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428
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1 /* Copyright (c) 1994, 1995 Free Software Foundation, Inc.
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2 Copyright (c) 1995 Sun Microsystems, Inc.
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793
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3 Copyright (c) 1995, 1996, 2000, 2002 Ben Wing.
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428
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Not in FSF. */
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23
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24 /* This file has been Mule-ized. */
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25
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26 /* Written by Ben Wing <ben@xemacs.org>.
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27
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28 [Originally written by some people at Lucid.
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29 Hacked on by jwz.
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30 Start/end-open stuff added by John Rose (john.rose@eng.sun.com).
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31 Rewritten from scratch by Ben Wing, December 1994.] */
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32
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33 /* Commentary:
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34
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35 Extents are regions over a buffer, with a start and an end position
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36 denoting the region of the buffer included in the extent. In
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37 addition, either end can be closed or open, meaning that the endpoint
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38 is or is not logically included in the extent. Insertion of a character
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39 at a closed endpoint causes the character to go inside the extent;
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40 insertion at an open endpoint causes the character to go outside.
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41
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42 Extent endpoints are stored using memory indices (see insdel.c),
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43 to minimize the amount of adjusting that needs to be done when
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44 characters are inserted or deleted.
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45
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46 (Formerly, extent endpoints at the gap could be either before or
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47 after the gap, depending on the open/closedness of the endpoint.
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48 The intent of this was to make it so that insertions would
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49 automatically go inside or out of extents as necessary with no
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50 further work needing to be done. It didn't work out that way,
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51 however, and just ended up complexifying and buggifying all the
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52 rest of the code.)
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53
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54 Extents are compared using memory indices. There are two orderings
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55 for extents and both orders are kept current at all times. The normal
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56 or "display" order is as follows:
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57
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58 Extent A is "less than" extent B, that is, earlier in the display order,
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59 if: A-start < B-start,
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60 or if: A-start = B-start, and A-end > B-end
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61
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62 So if two extents begin at the same position, the larger of them is the
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63 earlier one in the display order (EXTENT_LESS is true).
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64
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65 For the e-order, the same thing holds: Extent A is "less than" extent B
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66 in e-order, that is, later in the buffer,
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67 if: A-end < B-end,
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68 or if: A-end = B-end, and A-start > B-start
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69
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70 So if two extents end at the same position, the smaller of them is the
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71 earlier one in the e-order (EXTENT_E_LESS is true).
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72
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73 The display order and the e-order are complementary orders: any
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74 theorem about the display order also applies to the e-order if you
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75 swap all occurrences of "display order" and "e-order", "less than"
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76 and "greater than", and "extent start" and "extent end".
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77
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78 Extents can be zero-length, and will end up that way if their endpoints
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79 are explicitly set that way or if their detachable property is nil
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80 and all the text in the extent is deleted. (The exception is open-open
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81 zero-length extents, which are barred from existing because there is
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82 no sensible way to define their properties. Deletion of the text in
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83 an open-open extent causes it to be converted into a closed-open
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84 extent.) Zero-length extents are primarily used to represent
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85 annotations, and behave as follows:
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86
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87 1) Insertion at the position of a zero-length extent expands the extent
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88 if both endpoints are closed; goes after the extent if it is closed-open;
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89 and goes before the extent if it is open-closed.
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90
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91 2) Deletion of a character on a side of a zero-length extent whose
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92 corresponding endpoint is closed causes the extent to be detached if
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93 it is detachable; if the extent is not detachable or the corresponding
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94 endpoint is open, the extent remains in the buffer, moving as necessary.
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95
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96 Note that closed-open, non-detachable zero-length extents behave exactly
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97 like markers and that open-closed, non-detachable zero-length extents
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98 behave like the "point-type" marker in Mule.
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99
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100
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101 #### The following information is wrong in places.
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102
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103 More about the different orders:
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104 --------------------------------
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105
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106 The extents in a buffer are ordered by "display order" because that
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107 is that order that the redisplay mechanism needs to process them in.
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108 The e-order is an auxiliary ordering used to facilitate operations
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109 over extents. The operations that can be performed on the ordered
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110 list of extents in a buffer are
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111
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112 1) Locate where an extent would go if inserted into the list.
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113 2) Insert an extent into the list.
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114 3) Remove an extent from the list.
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115 4) Map over all the extents that overlap a range.
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116
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117 (4) requires being able to determine the first and last extents
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118 that overlap a range.
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119
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120 NOTE: "overlap" is used as follows:
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121
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122 -- two ranges overlap if they have at least one point in common.
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123 Whether the endpoints are open or closed makes a difference here.
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124 -- a point overlaps a range if the point is contained within the
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125 range; this is equivalent to treating a point P as the range
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126 [P, P].
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127 -- In the case of an *extent* overlapping a point or range, the
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128 extent is normally treated as having closed endpoints. This
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129 applies consistently in the discussion of stacks of extents
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130 and such below. Note that this definition of overlap is not
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131 necessarily consistent with the extents that `map-extents'
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132 maps over, since `map-extents' sometimes pays attention to
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133 whether the endpoints of an extents are open or closed.
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134 But for our purposes, it greatly simplifies things to treat
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135 all extents as having closed endpoints.
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136
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137 First, define >, <, <=, etc. as applied to extents to mean
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138 comparison according to the display order. Comparison between an
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139 extent E and an index I means comparison between E and the range
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140 [I, I].
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141 Also define e>, e<, e<=, etc. to mean comparison according to the
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142 e-order.
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143 For any range R, define R(0) to be the starting index of the range
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144 and R(1) to be the ending index of the range.
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145 For any extent E, define E(next) to be the extent directly following
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146 E, and E(prev) to be the extent directly preceding E. Assume
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147 E(next) and E(prev) can be determined from E in constant time.
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148 (This is because we store the extent list as a doubly linked
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149 list.)
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150 Similarly, define E(e-next) and E(e-prev) to be the extents
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151 directly following and preceding E in the e-order.
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152
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153 Now:
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154
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155 Let R be a range.
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156 Let F be the first extent overlapping R.
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157 Let L be the last extent overlapping R.
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158
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159 Theorem 1: R(1) lies between L and L(next), i.e. L <= R(1) < L(next).
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160
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161 This follows easily from the definition of display order. The
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162 basic reason that this theorem applies is that the display order
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163 sorts by increasing starting index.
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164
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165 Therefore, we can determine L just by looking at where we would
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166 insert R(1) into the list, and if we know F and are moving forward
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167 over extents, we can easily determine when we've hit L by comparing
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168 the extent we're at to R(1).
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169
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170 Theorem 2: F(e-prev) e< [1, R(0)] e<= F.
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171
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172 This is the analog of Theorem 1, and applies because the e-order
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173 sorts by increasing ending index.
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174
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175 Therefore, F can be found in the same amount of time as operation (1),
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176 i.e. the time that it takes to locate where an extent would go if
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177 inserted into the e-order list.
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178
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179 If the lists were stored as balanced binary trees, then operation (1)
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180 would take logarithmic time, which is usually quite fast. However,
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181 currently they're stored as simple doubly-linked lists, and instead
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182 we do some caching to try to speed things up.
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183
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184 Define a "stack of extents" (or "SOE") as the set of extents
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185 (ordered in the display order) that overlap an index I, together with
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186 the SOE's "previous" extent, which is an extent that precedes I in
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187 the e-order. (Hopefully there will not be very many extents between
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188 I and the previous extent.)
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189
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190 Now:
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191
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192 Let I be an index, let S be the stack of extents on I, let F be
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193 the first extent in S, and let P be S's previous extent.
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194
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195 Theorem 3: The first extent in S is the first extent that overlaps
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196 any range [I, J].
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197
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198 Proof: Any extent that overlaps [I, J] but does not include I must
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199 have a start index > I, and thus be greater than any extent in S.
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200
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201 Therefore, finding the first extent that overlaps a range R is the
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202 same as finding the first extent that overlaps R(0).
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203
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204 Theorem 4: Let I2 be an index such that I2 > I, and let F2 be the
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205 first extent that overlaps I2. Then, either F2 is in S or F2 is
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206 greater than any extent in S.
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207
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208 Proof: If F2 does not include I then its start index is greater
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209 than I and thus it is greater than any extent in S, including F.
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210 Otherwise, F2 includes I and thus is in S, and thus F2 >= F.
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211
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212 */
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213
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214 #include <config.h>
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215 #include "lisp.h"
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216
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217 #include "buffer.h"
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218 #include "debug.h"
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219 #include "device.h"
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220 #include "elhash.h"
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872
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221 #include "extents-impl.h"
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428
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222 #include "faces.h"
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223 #include "frame.h"
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224 #include "glyphs.h"
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225 #include "insdel.h"
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226 #include "keymap.h"
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227 #include "opaque.h"
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228 #include "process.h"
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229 #include "redisplay.h"
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442
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230 #include "gutter.h"
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428
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231
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232 /* ------------------------------- */
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233 /* gap array */
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234 /* ------------------------------- */
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235
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236 /* Note that this object is not extent-specific and should perhaps be
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237 moved into another file. */
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238
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239 /* Holds a marker that moves as elements in the array are inserted and
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240 deleted, similar to standard markers. */
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241
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242 typedef struct gap_array_marker
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243 {
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244 int pos;
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245 struct gap_array_marker *next;
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246 } Gap_Array_Marker;
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247
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1204
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248
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428
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249 /* Holds a "gap array", which is an array of elements with a gap located
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250 in it. Insertions and deletions with a high degree of locality
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251 are very fast, essentially in constant time. Array positions as
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252 used and returned in the gap array functions are independent of
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253 the gap. */
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254
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1204
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255 /* Layout of gap array:
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256
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257 <------ gap ------><---- gapsize ----><----- numels - gap ---->
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258 <---------------------- numels + gapsize --------------------->
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259
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260 For marking purposes, we use two extra variables computed from
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261 the others -- the offset to the data past the gap, plus the number
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262 of elements in that data:
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263
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264 offset_past_gap = elsize * (gap + gapsize)
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265 els_past_gap = numels - gap
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266
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267 #### The current layout will not cut it for dumping purposes. If we
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268 need to dump one of these structures, we will have to rearrange things
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269 so that the gap array data and other fields are in one single memory
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270 block. Either this is a pointer off of struct gap_array, or it is
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271 struct gap_array itself; in the latter case, the interface below has to
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272 be modified so that functions that change the array pass in a ** rather
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273 than a *, since the pointer may move.
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274 */
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275
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276
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428
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277 typedef struct gap_array
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278 {
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1204
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279 Elemcount gap;
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280 Elemcount gapsize;
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281 Elemcount numels;
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282 Bytecount elsize;
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283 /* Redundant numbers computed from the others, for marking purposes */
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284 Bytecount offset_past_gap;
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285 Elemcount els_past_gap;
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428
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286 Gap_Array_Marker *markers;
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1204
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287 /* this is a stretchy array */
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288 char array[1];
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428
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289 } Gap_Array;
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290
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291 static Gap_Array_Marker *gap_array_marker_freelist;
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292
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293 /* Convert a "memory position" (i.e. taking the gap into account) into
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294 the address of the element at (i.e. after) that position. "Memory
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826
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295 positions" are only used internally and are of type Memxpos.
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428
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296 "Array positions" are used externally and are of type int. */
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297 #define GAP_ARRAY_MEMEL_ADDR(ga, memel) ((ga)->array + (ga)->elsize*(memel))
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298
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299 /* Number of elements currently in a gap array */
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300 #define GAP_ARRAY_NUM_ELS(ga) ((ga)->numels)
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301
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302 #define GAP_ARRAY_ARRAY_TO_MEMORY_POS(ga, pos) \
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303 ((pos) <= (ga)->gap ? (pos) : (pos) + (ga)->gapsize)
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304
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305 #define GAP_ARRAY_MEMORY_TO_ARRAY_POS(ga, pos) \
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306 ((pos) <= (ga)->gap ? (pos) : (pos) - (ga)->gapsize)
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307
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308 /* Convert an array position into the address of the element at
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309 (i.e. after) that position. */
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310 #define GAP_ARRAY_EL_ADDR(ga, pos) ((pos) < (ga)->gap ? \
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311 GAP_ARRAY_MEMEL_ADDR(ga, pos) : \
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312 GAP_ARRAY_MEMEL_ADDR(ga, (pos) + (ga)->gapsize))
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313
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314 /* ------------------------------- */
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315 /* extent list */
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316 /* ------------------------------- */
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317
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318 typedef struct extent_list_marker
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319 {
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320 Gap_Array_Marker *m;
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321 int endp;
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322 struct extent_list_marker *next;
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323 } Extent_List_Marker;
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324
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325 typedef struct extent_list
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326 {
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327 Gap_Array *start;
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328 Gap_Array *end;
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329 Extent_List_Marker *markers;
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330 } Extent_List;
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331
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332 static Extent_List_Marker *extent_list_marker_freelist;
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333
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334 #define EXTENT_LESS_VALS(e,st,nd) ((extent_start (e) < (st)) || \
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335 ((extent_start (e) == (st)) && \
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336 (extent_end (e) > (nd))))
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337
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338 #define EXTENT_EQUAL_VALS(e,st,nd) ((extent_start (e) == (st)) && \
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339 (extent_end (e) == (nd)))
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340
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341 #define EXTENT_LESS_EQUAL_VALS(e,st,nd) ((extent_start (e) < (st)) || \
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342 ((extent_start (e) == (st)) && \
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343 (extent_end (e) >= (nd))))
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344
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345 /* Is extent E1 less than extent E2 in the display order? */
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346 #define EXTENT_LESS(e1,e2) \
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347 EXTENT_LESS_VALS (e1, extent_start (e2), extent_end (e2))
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348
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349 /* Is extent E1 equal to extent E2? */
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350 #define EXTENT_EQUAL(e1,e2) \
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351 EXTENT_EQUAL_VALS (e1, extent_start (e2), extent_end (e2))
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352
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353 /* Is extent E1 less than or equal to extent E2 in the display order? */
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354 #define EXTENT_LESS_EQUAL(e1,e2) \
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355 EXTENT_LESS_EQUAL_VALS (e1, extent_start (e2), extent_end (e2))
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356
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357 #define EXTENT_E_LESS_VALS(e,st,nd) ((extent_end (e) < (nd)) || \
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358 ((extent_end (e) == (nd)) && \
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359 (extent_start (e) > (st))))
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360
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361 #define EXTENT_E_LESS_EQUAL_VALS(e,st,nd) ((extent_end (e) < (nd)) || \
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362 ((extent_end (e) == (nd)) && \
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363 (extent_start (e) >= (st))))
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364
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365 /* Is extent E1 less than extent E2 in the e-order? */
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366 #define EXTENT_E_LESS(e1,e2) \
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367 EXTENT_E_LESS_VALS(e1, extent_start (e2), extent_end (e2))
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368
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369 /* Is extent E1 less than or equal to extent E2 in the e-order? */
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370 #define EXTENT_E_LESS_EQUAL(e1,e2) \
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371 EXTENT_E_LESS_EQUAL_VALS (e1, extent_start (e2), extent_end (e2))
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372
|
|
|
373 #define EXTENT_GAP_ARRAY_AT(ga, pos) (* (EXTENT *) GAP_ARRAY_EL_ADDR(ga, pos))
|
|
|
374
|
|
|
375 /* ------------------------------- */
|
|
|
376 /* auxiliary extent structure */
|
|
|
377 /* ------------------------------- */
|
|
|
378
|
|
|
379 struct extent_auxiliary extent_auxiliary_defaults;
|
|
|
380
|
|
|
381 /* ------------------------------- */
|
|
|
382 /* buffer-extent primitives */
|
|
|
383 /* ------------------------------- */
|
|
|
384
|
|
|
385 typedef struct stack_of_extents
|
|
|
386 {
|
|
|
387 Extent_List *extents;
|
|
826
|
388 Memxpos pos; /* Position of stack of extents. EXTENTS is the list of
|
|
428
|
389 all extents that overlap this position. This position
|
|
|
390 can be -1 if the stack of extents is invalid (this
|
|
|
391 happens when a buffer is first created or a string's
|
|
|
392 stack of extents is created [a string's stack of extents
|
|
|
393 is nuked when a GC occurs, to conserve memory]). */
|
|
|
394 } Stack_Of_Extents;
|
|
|
395
|
|
|
396 /* ------------------------------- */
|
|
|
397 /* map-extents */
|
|
|
398 /* ------------------------------- */
|
|
|
399
|
|
826
|
400 typedef int (*map_extents_fun) (EXTENT extent, void *arg);
|
|
|
401
|
|
428
|
402 typedef int Endpoint_Index;
|
|
|
403
|
|
826
|
404 #define memxpos_to_startind(x, start_open) \
|
|
428
|
405 ((Endpoint_Index) (((x) << 1) + !!(start_open)))
|
|
826
|
406 #define memxpos_to_endind(x, end_open) \
|
|
428
|
407 ((Endpoint_Index) (((x) << 1) - !!(end_open)))
|
|
|
408
|
|
|
409 /* ------------------------------- */
|
|
|
410 /* buffer-or-string primitives */
|
|
|
411 /* ------------------------------- */
|
|
|
412
|
|
826
|
413 /* Similar for Bytebpos's and start/end indices. */
|
|
|
414
|
|
|
415 #define buffer_or_string_bytexpos_to_startind(obj, ind, start_open) \
|
|
|
416 memxpos_to_startind (buffer_or_string_bytexpos_to_memxpos (obj, ind), \
|
|
428
|
417 start_open)
|
|
|
418
|
|
826
|
419 #define buffer_or_string_bytexpos_to_endind(obj, ind, end_open) \
|
|
|
420 memxpos_to_endind (buffer_or_string_bytexpos_to_memxpos (obj, ind), \
|
|
428
|
421 end_open)
|
|
|
422
|
|
|
423 /* ------------------------------- */
|
|
|
424 /* Lisp-level functions */
|
|
|
425 /* ------------------------------- */
|
|
|
426
|
|
|
427 /* flags for decode_extent() */
|
|
|
428 #define DE_MUST_HAVE_BUFFER 1
|
|
|
429 #define DE_MUST_BE_ATTACHED 2
|
|
|
430
|
|
|
431 Lisp_Object Vlast_highlighted_extent;
|
|
458
|
432 Fixnum mouse_highlight_priority;
|
|
428
|
433
|
|
|
434 Lisp_Object Qextentp;
|
|
|
435 Lisp_Object Qextent_live_p;
|
|
|
436
|
|
|
437 Lisp_Object Qall_extents_closed;
|
|
|
438 Lisp_Object Qall_extents_open;
|
|
|
439 Lisp_Object Qall_extents_closed_open;
|
|
|
440 Lisp_Object Qall_extents_open_closed;
|
|
|
441 Lisp_Object Qstart_in_region;
|
|
|
442 Lisp_Object Qend_in_region;
|
|
|
443 Lisp_Object Qstart_and_end_in_region;
|
|
|
444 Lisp_Object Qstart_or_end_in_region;
|
|
|
445 Lisp_Object Qnegate_in_region;
|
|
|
446
|
|
|
447 Lisp_Object Qdetached;
|
|
|
448 Lisp_Object Qdestroyed;
|
|
|
449 Lisp_Object Qbegin_glyph;
|
|
|
450 Lisp_Object Qend_glyph;
|
|
|
451 Lisp_Object Qstart_open;
|
|
|
452 Lisp_Object Qend_open;
|
|
|
453 Lisp_Object Qstart_closed;
|
|
|
454 Lisp_Object Qend_closed;
|
|
|
455 Lisp_Object Qread_only;
|
|
|
456 /* Qhighlight defined in general.c */
|
|
|
457 Lisp_Object Qunique;
|
|
|
458 Lisp_Object Qduplicable;
|
|
|
459 Lisp_Object Qdetachable;
|
|
|
460 Lisp_Object Qpriority;
|
|
|
461 Lisp_Object Qmouse_face;
|
|
|
462 Lisp_Object Qinitial_redisplay_function;
|
|
|
463
|
|
|
464 Lisp_Object Qglyph_layout; /* This exists only for backwards compatibility. */
|
|
|
465 Lisp_Object Qbegin_glyph_layout, Qend_glyph_layout;
|
|
|
466 Lisp_Object Qoutside_margin;
|
|
|
467 Lisp_Object Qinside_margin;
|
|
|
468 Lisp_Object Qwhitespace;
|
|
|
469 /* Qtext defined in general.c */
|
|
|
470
|
|
|
471 Lisp_Object Qcopy_function;
|
|
|
472 Lisp_Object Qpaste_function;
|
|
|
473
|
|
|
474 static Lisp_Object canonicalize_extent_property (Lisp_Object prop,
|
|
|
475 Lisp_Object value);
|
|
826
|
476
|
|
|
477 typedef struct
|
|
|
478 {
|
|
|
479 Lisp_Object key, value;
|
|
|
480 } Lisp_Object_pair;
|
|
|
481 typedef struct
|
|
|
482 {
|
|
|
483 Dynarr_declare (Lisp_Object_pair);
|
|
|
484 } Lisp_Object_pair_dynarr;
|
|
|
485
|
|
|
486 static void extent_properties (EXTENT e, Lisp_Object_pair_dynarr *props);
|
|
|
487
|
|
428
|
488 Lisp_Object Vextent_face_memoize_hash_table;
|
|
|
489 Lisp_Object Vextent_face_reverse_memoize_hash_table;
|
|
|
490 Lisp_Object Vextent_face_reusable_list;
|
|
|
491 /* FSFmacs bogosity */
|
|
|
492 Lisp_Object Vdefault_text_properties;
|
|
|
493
|
|
442
|
494 /* if true, we don't want to set any redisplay flags on modeline extent
|
|
|
495 changes */
|
|
|
496 int in_modeline_generation;
|
|
|
497
|
|
428
|
498
|
|
|
499 /************************************************************************/
|
|
|
500 /* Generalized gap array */
|
|
|
501 /************************************************************************/
|
|
|
502
|
|
|
503 /* This generalizes the "array with a gap" model used to store buffer
|
|
|
504 characters. This is based on the stuff in insdel.c and should
|
|
|
505 probably be merged with it. This is not extent-specific and should
|
|
|
506 perhaps be moved into a separate file. */
|
|
|
507
|
|
|
508 /* ------------------------------- */
|
|
|
509 /* internal functions */
|
|
|
510 /* ------------------------------- */
|
|
|
511
|
|
|
512 /* Adjust the gap array markers in the range (FROM, TO]. Parallel to
|
|
|
513 adjust_markers() in insdel.c. */
|
|
|
514
|
|
|
515 static void
|
|
826
|
516 gap_array_adjust_markers (Gap_Array *ga, Memxpos from,
|
|
1204
|
517 Memxpos to, Elemcount amount)
|
|
428
|
518 {
|
|
|
519 Gap_Array_Marker *m;
|
|
|
520
|
|
|
521 for (m = ga->markers; m; m = m->next)
|
|
|
522 m->pos = do_marker_adjustment (m->pos, from, to, amount);
|
|
|
523 }
|
|
|
524
|
|
1204
|
525 static void
|
|
|
526 gap_array_recompute_derived_values (Gap_Array *ga)
|
|
|
527 {
|
|
|
528 ga->offset_past_gap = ga->elsize * (ga->gap + ga->gapsize);
|
|
|
529 ga->els_past_gap = ga->numels - ga->gap;
|
|
|
530 }
|
|
|
531
|
|
428
|
532 /* Move the gap to array position POS. Parallel to move_gap() in
|
|
|
533 insdel.c but somewhat simplified. */
|
|
|
534
|
|
|
535 static void
|
|
1204
|
536 gap_array_move_gap (Gap_Array *ga, Elemcount pos)
|
|
|
537 {
|
|
|
538 Elemcount gap = ga->gap;
|
|
|
539 Elemcount gapsize = ga->gapsize;
|
|
|
540
|
|
428
|
541 if (pos < gap)
|
|
|
542 {
|
|
|
543 memmove (GAP_ARRAY_MEMEL_ADDR (ga, pos + gapsize),
|
|
|
544 GAP_ARRAY_MEMEL_ADDR (ga, pos),
|
|
|
545 (gap - pos)*ga->elsize);
|
|
826
|
546 gap_array_adjust_markers (ga, (Memxpos) pos, (Memxpos) gap,
|
|
428
|
547 gapsize);
|
|
|
548 }
|
|
|
549 else if (pos > gap)
|
|
|
550 {
|
|
|
551 memmove (GAP_ARRAY_MEMEL_ADDR (ga, gap),
|
|
|
552 GAP_ARRAY_MEMEL_ADDR (ga, gap + gapsize),
|
|
|
553 (pos - gap)*ga->elsize);
|
|
826
|
554 gap_array_adjust_markers (ga, (Memxpos) (gap + gapsize),
|
|
|
555 (Memxpos) (pos + gapsize), - gapsize);
|
|
428
|
556 }
|
|
|
557 ga->gap = pos;
|
|
1204
|
558
|
|
|
559 gap_array_recompute_derived_values (ga);
|
|
428
|
560 }
|
|
|
561
|
|
|
562 /* Make the gap INCREMENT characters longer. Parallel to make_gap() in
|
|
1204
|
563 insdel.c. The gap array may be moved, so assign the return value back
|
|
|
564 to the array pointer. */
|
|
|
565
|
|
|
566 static Gap_Array *
|
|
|
567 gap_array_make_gap (Gap_Array *ga, Elemcount increment)
|
|
|
568 {
|
|
|
569 Elemcount real_gap_loc;
|
|
|
570 Elemcount old_gap_size;
|
|
428
|
571
|
|
|
572 /* If we have to get more space, get enough to last a while. We use
|
|
|
573 a geometric progression that saves on realloc space. */
|
|
|
574 increment += 100 + ga->numels / 8;
|
|
|
575
|
|
1204
|
576 ga = (Gap_Array *) xrealloc (ga,
|
|
|
577 offsetof (Gap_Array, array) +
|
|
|
578 (ga->numels + ga->gapsize + increment) *
|
|
|
579 ga->elsize);
|
|
|
580 if (ga == 0)
|
|
428
|
581 memory_full ();
|
|
|
582
|
|
|
583 real_gap_loc = ga->gap;
|
|
|
584 old_gap_size = ga->gapsize;
|
|
|
585
|
|
|
586 /* Call the newly allocated space a gap at the end of the whole space. */
|
|
|
587 ga->gap = ga->numels + ga->gapsize;
|
|
|
588 ga->gapsize = increment;
|
|
|
589
|
|
|
590 /* Move the new gap down to be consecutive with the end of the old one.
|
|
|
591 This adjusts the markers properly too. */
|
|
|
592 gap_array_move_gap (ga, real_gap_loc + old_gap_size);
|
|
|
593
|
|
|
594 /* Now combine the two into one large gap. */
|
|
|
595 ga->gapsize += old_gap_size;
|
|
|
596 ga->gap = real_gap_loc;
|
|
1204
|
597
|
|
|
598 gap_array_recompute_derived_values (ga);
|
|
|
599
|
|
|
600 return ga;
|
|
428
|
601 }
|
|
|
602
|
|
|
603 /* ------------------------------- */
|
|
|
604 /* external functions */
|
|
|
605 /* ------------------------------- */
|
|
|
606
|
|
|
607 /* Insert NUMELS elements (pointed to by ELPTR) into the specified
|
|
1204
|
608 gap array at POS. The gap array may be moved, so assign the
|
|
|
609 return value back to the array pointer. */
|
|
|
610
|
|
|
611 static Gap_Array *
|
|
|
612 gap_array_insert_els (Gap_Array *ga, Elemcount pos, void *elptr,
|
|
|
613 Elemcount numels)
|
|
428
|
614 {
|
|
|
615 assert (pos >= 0 && pos <= ga->numels);
|
|
|
616 if (ga->gapsize < numels)
|
|
1204
|
617 ga = gap_array_make_gap (ga, numels - ga->gapsize);
|
|
428
|
618 if (pos != ga->gap)
|
|
|
619 gap_array_move_gap (ga, pos);
|
|
|
620
|
|
|
621 memcpy (GAP_ARRAY_MEMEL_ADDR (ga, ga->gap), (char *) elptr,
|
|
|
622 numels*ga->elsize);
|
|
|
623 ga->gapsize -= numels;
|
|
|
624 ga->gap += numels;
|
|
|
625 ga->numels += numels;
|
|
1204
|
626 gap_array_recompute_derived_values (ga);
|
|
428
|
627 /* This is the equivalent of insert-before-markers.
|
|
|
628
|
|
|
629 #### Should only happen if marker is "moves forward at insert" type.
|
|
|
630 */
|
|
|
631
|
|
|
632 gap_array_adjust_markers (ga, pos - 1, pos, numels);
|
|
1204
|
633 return ga;
|
|
428
|
634 }
|
|
|
635
|
|
|
636 /* Delete NUMELS elements from the specified gap array, starting at FROM. */
|
|
|
637
|
|
|
638 static void
|
|
1204
|
639 gap_array_delete_els (Gap_Array *ga, Elemcount from, Elemcount numdel)
|
|
|
640 {
|
|
|
641 Elemcount to = from + numdel;
|
|
|
642 Elemcount gapsize = ga->gapsize;
|
|
428
|
643
|
|
|
644 assert (from >= 0);
|
|
|
645 assert (numdel >= 0);
|
|
|
646 assert (to <= ga->numels);
|
|
|
647
|
|
|
648 /* Make sure the gap is somewhere in or next to what we are deleting. */
|
|
|
649 if (to < ga->gap)
|
|
|
650 gap_array_move_gap (ga, to);
|
|
|
651 if (from > ga->gap)
|
|
|
652 gap_array_move_gap (ga, from);
|
|
|
653
|
|
|
654 /* Relocate all markers pointing into the new, larger gap
|
|
|
655 to point at the end of the text before the gap. */
|
|
|
656 gap_array_adjust_markers (ga, to + gapsize, to + gapsize,
|
|
|
657 - numdel - gapsize);
|
|
|
658
|
|
|
659 ga->gapsize += numdel;
|
|
|
660 ga->numels -= numdel;
|
|
|
661 ga->gap = from;
|
|
1204
|
662 gap_array_recompute_derived_values (ga);
|
|
428
|
663 }
|
|
|
664
|
|
|
665 static Gap_Array_Marker *
|
|
1204
|
666 gap_array_make_marker (Gap_Array *ga, Elemcount pos)
|
|
428
|
667 {
|
|
|
668 Gap_Array_Marker *m;
|
|
|
669
|
|
|
670 assert (pos >= 0 && pos <= ga->numels);
|
|
|
671 if (gap_array_marker_freelist)
|
|
|
672 {
|
|
|
673 m = gap_array_marker_freelist;
|
|
|
674 gap_array_marker_freelist = gap_array_marker_freelist->next;
|
|
|
675 }
|
|
|
676 else
|
|
|
677 m = xnew (Gap_Array_Marker);
|
|
|
678
|
|
|
679 m->pos = GAP_ARRAY_ARRAY_TO_MEMORY_POS (ga, pos);
|
|
|
680 m->next = ga->markers;
|
|
|
681 ga->markers = m;
|
|
|
682 return m;
|
|
|
683 }
|
|
|
684
|
|
|
685 static void
|
|
|
686 gap_array_delete_marker (Gap_Array *ga, Gap_Array_Marker *m)
|
|
|
687 {
|
|
|
688 Gap_Array_Marker *p, *prev;
|
|
|
689
|
|
|
690 for (prev = 0, p = ga->markers; p && p != m; prev = p, p = p->next)
|
|
|
691 ;
|
|
|
692 assert (p);
|
|
|
693 if (prev)
|
|
|
694 prev->next = p->next;
|
|
|
695 else
|
|
|
696 ga->markers = p->next;
|
|
|
697 m->next = gap_array_marker_freelist;
|
|
1204
|
698 m->pos = 0xDEADBEEF; /* -559038737 base 10 */
|
|
428
|
699 gap_array_marker_freelist = m;
|
|
|
700 }
|
|
|
701
|
|
|
702 static void
|
|
|
703 gap_array_delete_all_markers (Gap_Array *ga)
|
|
|
704 {
|
|
|
705 Gap_Array_Marker *p, *next;
|
|
|
706
|
|
|
707 for (p = ga->markers; p; p = next)
|
|
|
708 {
|
|
|
709 next = p->next;
|
|
|
710 p->next = gap_array_marker_freelist;
|
|
|
711 p->pos = 0xDEADBEEF; /* -559038737 as an int */
|
|
|
712 gap_array_marker_freelist = p;
|
|
|
713 }
|
|
|
714 }
|
|
|
715
|
|
|
716 static void
|
|
1204
|
717 gap_array_move_marker (Gap_Array *ga, Gap_Array_Marker *m, Elemcount pos)
|
|
428
|
718 {
|
|
|
719 assert (pos >= 0 && pos <= ga->numels);
|
|
|
720 m->pos = GAP_ARRAY_ARRAY_TO_MEMORY_POS (ga, pos);
|
|
|
721 }
|
|
|
722
|
|
|
723 #define gap_array_marker_pos(ga, m) \
|
|
|
724 GAP_ARRAY_MEMORY_TO_ARRAY_POS (ga, (m)->pos)
|
|
|
725
|
|
|
726 static Gap_Array *
|
|
1204
|
727 make_gap_array (Elemcount elsize)
|
|
428
|
728 {
|
|
|
729 Gap_Array *ga = xnew_and_zero (Gap_Array);
|
|
|
730 ga->elsize = elsize;
|
|
|
731 return ga;
|
|
|
732 }
|
|
|
733
|
|
|
734 static void
|
|
|
735 free_gap_array (Gap_Array *ga)
|
|
|
736 {
|
|
|
737 gap_array_delete_all_markers (ga);
|
|
|
738 xfree (ga);
|
|
|
739 }
|
|
|
740
|
|
|
741
|
|
|
742 /************************************************************************/
|
|
|
743 /* Extent list primitives */
|
|
|
744 /************************************************************************/
|
|
|
745
|
|
|
746 /* A list of extents is maintained as a double gap array: one gap array
|
|
|
747 is ordered by start index (the "display order") and the other is
|
|
|
748 ordered by end index (the "e-order"). Note that positions in an
|
|
|
749 extent list should logically be conceived of as referring *to*
|
|
|
750 a particular extent (as is the norm in programs) rather than
|
|
|
751 sitting between two extents. Note also that callers of these
|
|
|
752 functions should not be aware of the fact that the extent list is
|
|
|
753 implemented as an array, except for the fact that positions are
|
|
|
754 integers (this should be generalized to handle integers and linked
|
|
|
755 list equally well).
|
|
|
756 */
|
|
|
757
|
|
|
758 /* Number of elements in an extent list */
|
|
1204
|
759 #define extent_list_num_els(el) GAP_ARRAY_NUM_ELS (el->start)
|
|
428
|
760
|
|
|
761 /* Return the position at which EXTENT is located in the specified extent
|
|
|
762 list (in the display order if ENDP is 0, in the e-order otherwise).
|
|
|
763 If the extent is not found, the position where the extent would
|
|
|
764 be inserted is returned. If ENDP is 0, the insertion would go after
|
|
|
765 all other equal extents. If ENDP is not 0, the insertion would go
|
|
|
766 before all other equal extents. If FOUNDP is not 0, then whether
|
|
|
767 the extent was found will get written into it. */
|
|
|
768
|
|
|
769 static int
|
|
|
770 extent_list_locate (Extent_List *el, EXTENT extent, int endp, int *foundp)
|
|
|
771 {
|
|
|
772 Gap_Array *ga = endp ? el->end : el->start;
|
|
|
773 int left = 0, right = GAP_ARRAY_NUM_ELS (ga);
|
|
|
774 int oldfoundpos, foundpos;
|
|
|
775 int found;
|
|
|
776
|
|
|
777 while (left != right)
|
|
|
778 {
|
|
|
779 /* RIGHT might not point to a valid extent (i.e. it's at the end
|
|
|
780 of the list), so NEWPOS must round down. */
|
|
647
|
781 int newpos = (left + right) >> 1;
|
|
428
|
782 EXTENT e = EXTENT_GAP_ARRAY_AT (ga, (int) newpos);
|
|
|
783
|
|
|
784 if (endp ? EXTENT_E_LESS (e, extent) : EXTENT_LESS (e, extent))
|
|
647
|
785 left = newpos + 1;
|
|
428
|
786 else
|
|
|
787 right = newpos;
|
|
|
788 }
|
|
|
789
|
|
|
790 /* Now we're at the beginning of all equal extents. */
|
|
|
791 found = 0;
|
|
|
792 oldfoundpos = foundpos = left;
|
|
|
793 while (foundpos < GAP_ARRAY_NUM_ELS (ga))
|
|
|
794 {
|
|
|
795 EXTENT e = EXTENT_GAP_ARRAY_AT (ga, foundpos);
|
|
|
796 if (e == extent)
|
|
|
797 {
|
|
|
798 found = 1;
|
|
|
799 break;
|
|
|
800 }
|
|
|
801 if (!EXTENT_EQUAL (e, extent))
|
|
|
802 break;
|
|
|
803 foundpos++;
|
|
|
804 }
|
|
|
805 if (foundp)
|
|
|
806 *foundp = found;
|
|
|
807 if (found || !endp)
|
|
|
808 return foundpos;
|
|
|
809 else
|
|
|
810 return oldfoundpos;
|
|
|
811 }
|
|
|
812
|
|
|
813 /* Return the position of the first extent that begins at or after POS
|
|
|
814 (or ends at or after POS, if ENDP is not 0).
|
|
|
815
|
|
|
816 An out-of-range value for POS is allowed, and guarantees that the
|
|
|
817 position at the beginning or end of the extent list is returned. */
|
|
|
818
|
|
|
819 static int
|
|
826
|
820 extent_list_locate_from_pos (Extent_List *el, Memxpos pos, int endp)
|
|
428
|
821 {
|
|
|
822 struct extent fake_extent;
|
|
|
823 /*
|
|
|
824
|
|
|
825 Note that if we search for [POS, POS], then we get the following:
|
|
|
826
|
|
|
827 -- if ENDP is 0, then all extents whose start position is <= POS
|
|
|
828 lie before the returned position, and all extents whose start
|
|
|
829 position is > POS lie at or after the returned position.
|
|
|
830
|
|
|
831 -- if ENDP is not 0, then all extents whose end position is < POS
|
|
|
832 lie before the returned position, and all extents whose end
|
|
|
833 position is >= POS lie at or after the returned position.
|
|
|
834
|
|
|
835 */
|
|
|
836 set_extent_start (&fake_extent, endp ? pos : pos-1);
|
|
|
837 set_extent_end (&fake_extent, endp ? pos : pos-1);
|
|
|
838 return extent_list_locate (el, &fake_extent, endp, 0);
|
|
|
839 }
|
|
|
840
|
|
|
841 /* Return the extent at POS. */
|
|
|
842
|
|
|
843 static EXTENT
|
|
826
|
844 extent_list_at (Extent_List *el, Memxpos pos, int endp)
|
|
428
|
845 {
|
|
|
846 Gap_Array *ga = endp ? el->end : el->start;
|
|
|
847
|
|
|
848 assert (pos >= 0 && pos < GAP_ARRAY_NUM_ELS (ga));
|
|
|
849 return EXTENT_GAP_ARRAY_AT (ga, pos);
|
|
|
850 }
|
|
|
851
|
|
|
852 /* Insert an extent into an extent list. */
|
|
|
853
|
|
|
854 static void
|
|
|
855 extent_list_insert (Extent_List *el, EXTENT extent)
|
|
|
856 {
|
|
|
857 int pos, foundp;
|
|
|
858
|
|
|
859 pos = extent_list_locate (el, extent, 0, &foundp);
|
|
|
860 assert (!foundp);
|
|
1204
|
861 el->start = gap_array_insert_els (el->start, pos, &extent, 1);
|
|
428
|
862 pos = extent_list_locate (el, extent, 1, &foundp);
|
|
|
863 assert (!foundp);
|
|
1204
|
864 el->end = gap_array_insert_els (el->end, pos, &extent, 1);
|
|
428
|
865 }
|
|
|
866
|
|
|
867 /* Delete an extent from an extent list. */
|
|
|
868
|
|
|
869 static void
|
|
|
870 extent_list_delete (Extent_List *el, EXTENT extent)
|
|
|
871 {
|
|
|
872 int pos, foundp;
|
|
|
873
|
|
|
874 pos = extent_list_locate (el, extent, 0, &foundp);
|
|
|
875 assert (foundp);
|
|
|
876 gap_array_delete_els (el->start, pos, 1);
|
|
|
877 pos = extent_list_locate (el, extent, 1, &foundp);
|
|
|
878 assert (foundp);
|
|
|
879 gap_array_delete_els (el->end, pos, 1);
|
|
|
880 }
|
|
|
881
|
|
|
882 static void
|
|
|
883 extent_list_delete_all (Extent_List *el)
|
|
|
884 {
|
|
|
885 gap_array_delete_els (el->start, 0, GAP_ARRAY_NUM_ELS (el->start));
|
|
|
886 gap_array_delete_els (el->end, 0, GAP_ARRAY_NUM_ELS (el->end));
|
|
|
887 }
|
|
|
888
|
|
|
889 static Extent_List_Marker *
|
|
|
890 extent_list_make_marker (Extent_List *el, int pos, int endp)
|
|
|
891 {
|
|
|
892 Extent_List_Marker *m;
|
|
|
893
|
|
|
894 if (extent_list_marker_freelist)
|
|
|
895 {
|
|
|
896 m = extent_list_marker_freelist;
|
|
|
897 extent_list_marker_freelist = extent_list_marker_freelist->next;
|
|
|
898 }
|
|
|
899 else
|
|
|
900 m = xnew (Extent_List_Marker);
|
|
|
901
|
|
|
902 m->m = gap_array_make_marker (endp ? el->end : el->start, pos);
|
|
|
903 m->endp = endp;
|
|
|
904 m->next = el->markers;
|
|
|
905 el->markers = m;
|
|
|
906 return m;
|
|
|
907 }
|
|
|
908
|
|
|
909 #define extent_list_move_marker(el, mkr, pos) \
|
|
|
910 gap_array_move_marker((mkr)->endp ? (el)->end : (el)->start, (mkr)->m, pos)
|
|
|
911
|
|
|
912 static void
|
|
|
913 extent_list_delete_marker (Extent_List *el, Extent_List_Marker *m)
|
|
|
914 {
|
|
|
915 Extent_List_Marker *p, *prev;
|
|
|
916
|
|
|
917 for (prev = 0, p = el->markers; p && p != m; prev = p, p = p->next)
|
|
|
918 ;
|
|
|
919 assert (p);
|
|
|
920 if (prev)
|
|
|
921 prev->next = p->next;
|
|
|
922 else
|
|
|
923 el->markers = p->next;
|
|
|
924 m->next = extent_list_marker_freelist;
|
|
|
925 extent_list_marker_freelist = m;
|
|
|
926 gap_array_delete_marker (m->endp ? el->end : el->start, m->m);
|
|
|
927 }
|
|
|
928
|
|
|
929 #define extent_list_marker_pos(el, mkr) \
|
|
|
930 gap_array_marker_pos ((mkr)->endp ? (el)->end : (el)->start, (mkr)->m)
|
|
|
931
|
|
|
932 static Extent_List *
|
|
|
933 allocate_extent_list (void)
|
|
|
934 {
|
|
|
935 Extent_List *el = xnew (Extent_List);
|
|
440
|
936 el->start = make_gap_array (sizeof (EXTENT));
|
|
|
937 el->end = make_gap_array (sizeof (EXTENT));
|
|
428
|
938 el->markers = 0;
|
|
|
939 return el;
|
|
|
940 }
|
|
|
941
|
|
|
942 static void
|
|
|
943 free_extent_list (Extent_List *el)
|
|
|
944 {
|
|
|
945 free_gap_array (el->start);
|
|
|
946 free_gap_array (el->end);
|
|
|
947 xfree (el);
|
|
|
948 }
|
|
|
949
|
|
|
950
|
|
|
951 /************************************************************************/
|
|
|
952 /* Auxiliary extent structure */
|
|
|
953 /************************************************************************/
|
|
|
954
|
|
1204
|
955 static const struct memory_description extent_auxiliary_description[] ={
|
|
934
|
956 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, begin_glyph) },
|
|
|
957 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, end_glyph) },
|
|
|
958 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, parent) },
|
|
|
959 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, children) },
|
|
|
960 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, invisible) },
|
|
|
961 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, read_only) },
|
|
|
962 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, mouse_face) },
|
|
|
963 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, initial_redisplay_function) },
|
|
|
964 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, before_change_functions) },
|
|
|
965 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, after_change_functions) },
|
|
|
966 { XD_END }
|
|
|
967 };
|
|
428
|
968 static Lisp_Object
|
|
|
969 mark_extent_auxiliary (Lisp_Object obj)
|
|
|
970 {
|
|
|
971 struct extent_auxiliary *data = XEXTENT_AUXILIARY (obj);
|
|
|
972 mark_object (data->begin_glyph);
|
|
|
973 mark_object (data->end_glyph);
|
|
|
974 mark_object (data->invisible);
|
|
|
975 mark_object (data->children);
|
|
|
976 mark_object (data->read_only);
|
|
|
977 mark_object (data->mouse_face);
|
|
|
978 mark_object (data->initial_redisplay_function);
|
|
|
979 mark_object (data->before_change_functions);
|
|
|
980 mark_object (data->after_change_functions);
|
|
|
981 return data->parent;
|
|
|
982 }
|
|
|
983
|
|
934
|
984 DEFINE_LRECORD_IMPLEMENTATION ("extent-auxiliary", extent_auxiliary,
|
|
|
985 0, /*dumpable-flag*/
|
|
|
986 mark_extent_auxiliary, internal_object_printer,
|
|
1204
|
987 0, 0, 0, extent_auxiliary_description,
|
|
|
988 struct extent_auxiliary);
|
|
428
|
989 void
|
|
|
990 allocate_extent_auxiliary (EXTENT ext)
|
|
|
991 {
|
|
|
992 Lisp_Object extent_aux;
|
|
|
993 struct extent_auxiliary *data =
|
|
|
994 alloc_lcrecord_type (struct extent_auxiliary, &lrecord_extent_auxiliary);
|
|
|
995
|
|
|
996 copy_lcrecord (data, &extent_auxiliary_defaults);
|
|
793
|
997 extent_aux = wrap_extent_auxiliary (data);
|
|
428
|
998 ext->plist = Fcons (extent_aux, ext->plist);
|
|
|
999 ext->flags.has_aux = 1;
|
|
|
1000 }
|
|
|
1001
|
|
|
1002
|
|
|
1003 /************************************************************************/
|
|
|
1004 /* Extent info structure */
|
|
|
1005 /************************************************************************/
|
|
|
1006
|
|
|
1007 /* An extent-info structure consists of a list of the buffer or string's
|
|
|
1008 extents and a "stack of extents" that lists all of the extents over
|
|
|
1009 a particular position. The stack-of-extents info is used for
|
|
|
1010 optimization purposes -- it basically caches some info that might
|
|
|
1011 be expensive to compute. Certain otherwise hard computations are easy
|
|
|
1012 given the stack of extents over a particular position, and if the
|
|
|
1013 stack of extents over a nearby position is known (because it was
|
|
|
1014 calculated at some prior point in time), it's easy to move the stack
|
|
|
1015 of extents to the proper position.
|
|
|
1016
|
|
|
1017 Given that the stack of extents is an optimization, and given that
|
|
|
1018 it requires memory, a string's stack of extents is wiped out each
|
|
|
1019 time a garbage collection occurs. Therefore, any time you retrieve
|
|
|
1020 the stack of extents, it might not be there. If you need it to
|
|
|
1021 be there, use the _force version.
|
|
|
1022
|
|
|
1023 Similarly, a string may or may not have an extent_info structure.
|
|
|
1024 (Generally it won't if there haven't been any extents added to the
|
|
|
1025 string.) So use the _force version if you need the extent_info
|
|
|
1026 structure to be there. */
|
|
|
1027
|
|
|
1028 static struct stack_of_extents *allocate_soe (void);
|
|
|
1029 static void free_soe (struct stack_of_extents *soe);
|
|
|
1030 static void soe_invalidate (Lisp_Object obj);
|
|
|
1031
|
|
1204
|
1032 extern const struct sized_memory_description gap_array_marker_description;
|
|
|
1033
|
|
|
1034 static const struct memory_description gap_array_marker_description_1[] = {
|
|
|
1035 { XD_STRUCT_PTR, offsetof (Gap_Array_Marker, next), 1,
|
|
|
1036 &gap_array_marker_description },
|
|
|
1037 { XD_END }
|
|
|
1038 };
|
|
|
1039
|
|
|
1040 const struct sized_memory_description gap_array_marker_description = {
|
|
|
1041 sizeof (Gap_Array_Marker),
|
|
|
1042 gap_array_marker_description_1
|
|
934
|
1043 };
|
|
|
1044
|
|
1204
|
1045 static const struct memory_description lispobj_gap_array_description_1[] = {
|
|
|
1046 { XD_INT, offsetof (Gap_Array, gap) },
|
|
|
1047 { XD_INT, offsetof (Gap_Array, offset_past_gap) },
|
|
|
1048 { XD_INT, offsetof (Gap_Array, els_past_gap) },
|
|
|
1049 { XD_STRUCT_PTR, offsetof (Gap_Array, markers), 1,
|
|
|
1050 &gap_array_marker_description, XD_FLAG_NO_KKCC },
|
|
|
1051 { XD_STRUCT_ARRAY, offsetof (Gap_Array, array), XD_INDIRECT (0, 0),
|
|
|
1052 &lisp_object_description },
|
|
|
1053 { XD_STRUCT_ARRAY, XD_INDIRECT (1, offsetof (Gap_Array, array)),
|
|
|
1054 XD_INDIRECT (2, 0), &lisp_object_description },
|
|
934
|
1055 { XD_END }
|
|
|
1056 };
|
|
1204
|
1057
|
|
|
1058 static const struct sized_memory_description lispobj_gap_array_description = {
|
|
|
1059 sizeof (Gap_Array),
|
|
|
1060 lispobj_gap_array_description_1
|
|
|
1061 };
|
|
|
1062
|
|
|
1063 extern const struct sized_memory_description extent_list_marker_description;
|
|
|
1064
|
|
|
1065 static const struct memory_description extent_list_marker_description_1[] = {
|
|
|
1066 { XD_STRUCT_PTR, offsetof (Extent_List_Marker, m), 1,
|
|
|
1067 &gap_array_marker_description },
|
|
|
1068 { XD_STRUCT_PTR, offsetof (Extent_List_Marker, next), 1,
|
|
|
1069 &extent_list_marker_description },
|
|
|
1070 { XD_END }
|
|
|
1071 };
|
|
|
1072
|
|
|
1073 const struct sized_memory_description extent_list_marker_description = {
|
|
|
1074 sizeof (Extent_List_Marker),
|
|
|
1075 extent_list_marker_description_1
|
|
|
1076 };
|
|
|
1077
|
|
|
1078 static const struct memory_description extent_list_description_1[] = {
|
|
|
1079 { XD_STRUCT_PTR, offsetof (Extent_List, start), 1, &lispobj_gap_array_description },
|
|
|
1080 { XD_STRUCT_PTR, offsetof (Extent_List, end), 1, &lispobj_gap_array_description, XD_FLAG_NO_KKCC },
|
|
|
1081 { XD_STRUCT_PTR, offsetof (Extent_List, markers), 1, &extent_list_marker_description, XD_FLAG_NO_KKCC },
|
|
|
1082 { XD_END }
|
|
|
1083 };
|
|
|
1084
|
|
|
1085 static const struct sized_memory_description extent_list_description = {
|
|
|
1086 sizeof (Extent_List),
|
|
|
1087 extent_list_description_1
|
|
|
1088 };
|
|
|
1089
|
|
|
1090 static const struct memory_description stack_of_extents_description_1[] = {
|
|
|
1091 { XD_STRUCT_PTR, offsetof (Stack_Of_Extents, extents), 1, &extent_list_description },
|
|
|
1092 { XD_END }
|
|
|
1093 };
|
|
|
1094
|
|
|
1095 static const struct sized_memory_description stack_of_extents_description = {
|
|
|
1096 sizeof (Stack_Of_Extents),
|
|
|
1097 stack_of_extents_description_1
|
|
|
1098 };
|
|
|
1099
|
|
|
1100 static const struct memory_description extent_info_description [] = {
|
|
|
1101 { XD_STRUCT_PTR, offsetof (struct extent_info, extents), 1,
|
|
|
1102 &extent_list_description },
|
|
|
1103 { XD_STRUCT_PTR, offsetof (struct extent_info, soe), 1,
|
|
|
1104 &stack_of_extents_description, XD_FLAG_NO_KKCC },
|
|
|
1105 { XD_END }
|
|
|
1106 };
|
|
934
|
1107
|
|
428
|
1108 static Lisp_Object
|
|
|
1109 mark_extent_info (Lisp_Object obj)
|
|
|
1110 {
|
|
|
1111 struct extent_info *data = (struct extent_info *) XEXTENT_INFO (obj);
|
|
|
1112 int i;
|
|
|
1113 Extent_List *list = data->extents;
|
|
|
1114
|
|
|
1115 /* Vbuffer_defaults and Vbuffer_local_symbols are buffer-like
|
|
|
1116 objects that are created specially and never have their extent
|
|
|
1117 list initialized (or rather, it is set to zero in
|
|
|
1118 nuke_all_buffer_slots()). However, these objects get
|
|
|
1119 garbage-collected so we have to deal.
|
|
|
1120
|
|
|
1121 (Also the list can be zero when we're dealing with a destroyed
|
|
|
1122 buffer.) */
|
|
|
1123
|
|
|
1124 if (list)
|
|
|
1125 {
|
|
|
1126 for (i = 0; i < extent_list_num_els (list); i++)
|
|
|
1127 {
|
|
|
1128 struct extent *extent = extent_list_at (list, i, 0);
|
|
793
|
1129 Lisp_Object exobj = wrap_extent (extent);
|
|
|
1130
|
|
428
|
1131 mark_object (exobj);
|
|
|
1132 }
|
|
|
1133 }
|
|
|
1134
|
|
|
1135 return Qnil;
|
|
|
1136 }
|
|
|
1137
|
|
|
1138 static void
|
|
|
1139 finalize_extent_info (void *header, int for_disksave)
|
|
|
1140 {
|
|
|
1141 struct extent_info *data = (struct extent_info *) header;
|
|
|
1142
|
|
|
1143 if (for_disksave)
|
|
|
1144 return;
|
|
|
1145
|
|
|
1146 if (data->soe)
|
|
|
1147 {
|
|
|
1148 free_soe (data->soe);
|
|
|
1149 data->soe = 0;
|
|
|
1150 }
|
|
|
1151 if (data->extents)
|
|
|
1152 {
|
|
|
1153 free_extent_list (data->extents);
|
|
|
1154 data->extents = 0;
|
|
|
1155 }
|
|
|
1156 }
|
|
|
1157
|
|
934
|
1158 DEFINE_LRECORD_IMPLEMENTATION ("extent-info", extent_info,
|
|
|
1159 0, /*dumpable-flag*/
|
|
|
1160 mark_extent_info, internal_object_printer,
|
|
|
1161 finalize_extent_info, 0, 0,
|
|
1204
|
1162 extent_info_description,
|
|
934
|
1163 struct extent_info);
|
|
428
|
1164
|
|
|
1165 static Lisp_Object
|
|
|
1166 allocate_extent_info (void)
|
|
|
1167 {
|
|
|
1168 Lisp_Object extent_info;
|
|
|
1169 struct extent_info *data =
|
|
|
1170 alloc_lcrecord_type (struct extent_info, &lrecord_extent_info);
|
|
|
1171
|
|
793
|
1172 extent_info = wrap_extent_info (data);
|
|
428
|
1173 data->extents = allocate_extent_list ();
|
|
|
1174 data->soe = 0;
|
|
|
1175 return extent_info;
|
|
|
1176 }
|
|
|
1177
|
|
|
1178 void
|
|
|
1179 flush_cached_extent_info (Lisp_Object extent_info)
|
|
|
1180 {
|
|
|
1181 struct extent_info *data = XEXTENT_INFO (extent_info);
|
|
|
1182
|
|
|
1183 if (data->soe)
|
|
|
1184 {
|
|
|
1185 free_soe (data->soe);
|
|
|
1186 data->soe = 0;
|
|
|
1187 }
|
|
|
1188 }
|
|
|
1189
|
|
|
1190
|
|
|
1191 /************************************************************************/
|
|
|
1192 /* Buffer/string extent primitives */
|
|
|
1193 /************************************************************************/
|
|
|
1194
|
|
|
1195 /* The functions in this section are the ONLY ones that should know
|
|
|
1196 about the internal implementation of the extent lists. Other functions
|
|
|
1197 should only know that there are two orderings on extents, the "display"
|
|
|
1198 order (sorted by start position, basically) and the e-order (sorted
|
|
|
1199 by end position, basically), and that certain operations are provided
|
|
|
1200 to manipulate the list. */
|
|
|
1201
|
|
|
1202 /* ------------------------------- */
|
|
|
1203 /* basic primitives */
|
|
|
1204 /* ------------------------------- */
|
|
|
1205
|
|
|
1206 static Lisp_Object
|
|
|
1207 decode_buffer_or_string (Lisp_Object object)
|
|
|
1208 {
|
|
|
1209 if (NILP (object))
|
|
793
|
1210 object = wrap_buffer (current_buffer);
|
|
428
|
1211 else if (BUFFERP (object))
|
|
|
1212 CHECK_LIVE_BUFFER (object);
|
|
|
1213 else if (STRINGP (object))
|
|
|
1214 ;
|
|
|
1215 else
|
|
|
1216 dead_wrong_type_argument (Qbuffer_or_string_p, object);
|
|
|
1217
|
|
|
1218 return object;
|
|
|
1219 }
|
|
|
1220
|
|
|
1221 EXTENT
|
|
|
1222 extent_ancestor_1 (EXTENT e)
|
|
|
1223 {
|
|
|
1224 while (e->flags.has_parent)
|
|
|
1225 {
|
|
|
1226 /* There should be no circularities except in case of a logic
|
|
|
1227 error somewhere in the extent code */
|
|
|
1228 e = XEXTENT (XEXTENT_AUXILIARY (XCAR (e->plist))->parent);
|
|
|
1229 }
|
|
|
1230 return e;
|
|
|
1231 }
|
|
|
1232
|
|
|
1233 /* Given an extent object (string or buffer or nil), return its extent info.
|
|
|
1234 This may be 0 for a string. */
|
|
|
1235
|
|
|
1236 static struct extent_info *
|
|
|
1237 buffer_or_string_extent_info (Lisp_Object object)
|
|
|
1238 {
|
|
|
1239 if (STRINGP (object))
|
|
|
1240 {
|
|
793
|
1241 Lisp_Object plist = XSTRING_PLIST (object);
|
|
428
|
1242 if (!CONSP (plist) || !EXTENT_INFOP (XCAR (plist)))
|
|
|
1243 return 0;
|
|
|
1244 return XEXTENT_INFO (XCAR (plist));
|
|
|
1245 }
|
|
|
1246 else if (NILP (object))
|
|
|
1247 return 0;
|
|
|
1248 else
|
|
|
1249 return XEXTENT_INFO (XBUFFER (object)->extent_info);
|
|
|
1250 }
|
|
|
1251
|
|
|
1252 /* Given a string or buffer, return its extent list. This may be
|
|
|
1253 0 for a string. */
|
|
|
1254
|
|
|
1255 static Extent_List *
|
|
|
1256 buffer_or_string_extent_list (Lisp_Object object)
|
|
|
1257 {
|
|
|
1258 struct extent_info *info = buffer_or_string_extent_info (object);
|
|
|
1259
|
|
|
1260 if (!info)
|
|
|
1261 return 0;
|
|
|
1262 return info->extents;
|
|
|
1263 }
|
|
|
1264
|
|
|
1265 /* Given a string or buffer, return its extent info. If it's not there,
|
|
|
1266 create it. */
|
|
|
1267
|
|
|
1268 static struct extent_info *
|
|
|
1269 buffer_or_string_extent_info_force (Lisp_Object object)
|
|
|
1270 {
|
|
|
1271 struct extent_info *info = buffer_or_string_extent_info (object);
|
|
|
1272
|
|
|
1273 if (!info)
|
|
|
1274 {
|
|
|
1275 Lisp_Object extent_info;
|
|
|
1276
|
|
|
1277 assert (STRINGP (object)); /* should never happen for buffers --
|
|
|
1278 the only buffers without an extent
|
|
|
1279 info are those after finalization,
|
|
|
1280 destroyed buffers, or special
|
|
|
1281 Lisp-inaccessible buffer objects. */
|
|
|
1282 extent_info = allocate_extent_info ();
|
|
793
|
1283 XSTRING_PLIST (object) = Fcons (extent_info, XSTRING_PLIST (object));
|
|
428
|
1284 return XEXTENT_INFO (extent_info);
|
|
|
1285 }
|
|
|
1286
|
|
|
1287 return info;
|
|
|
1288 }
|
|
|
1289
|
|
|
1290 /* Detach all the extents in OBJECT. Called from redisplay. */
|
|
|
1291
|
|
|
1292 void
|
|
|
1293 detach_all_extents (Lisp_Object object)
|
|
|
1294 {
|
|
|
1295 struct extent_info *data = buffer_or_string_extent_info (object);
|
|
|
1296
|
|
|
1297 if (data)
|
|
|
1298 {
|
|
|
1299 if (data->extents)
|
|
|
1300 {
|
|
|
1301 int i;
|
|
|
1302
|
|
|
1303 for (i = 0; i < extent_list_num_els (data->extents); i++)
|
|
|
1304 {
|
|
|
1305 EXTENT e = extent_list_at (data->extents, i, 0);
|
|
|
1306 /* No need to do detach_extent(). Just nuke the damn things,
|
|
|
1307 which results in the equivalent but faster. */
|
|
|
1308 set_extent_start (e, -1);
|
|
|
1309 set_extent_end (e, -1);
|
|
|
1310 }
|
|
|
1311 }
|
|
|
1312
|
|
|
1313 /* But we need to clear all the lists containing extents or
|
|
|
1314 havoc will result. */
|
|
|
1315 extent_list_delete_all (data->extents);
|
|
|
1316 soe_invalidate (object);
|
|
|
1317 }
|
|
|
1318 }
|
|
|
1319
|
|
|
1320
|
|
|
1321 void
|
|
|
1322 init_buffer_extents (struct buffer *b)
|
|
|
1323 {
|
|
|
1324 b->extent_info = allocate_extent_info ();
|
|
|
1325 }
|
|
|
1326
|
|
|
1327 void
|
|
|
1328 uninit_buffer_extents (struct buffer *b)
|
|
|
1329 {
|
|
|
1330 struct extent_info *data = XEXTENT_INFO (b->extent_info);
|
|
|
1331
|
|
|
1332 /* Don't destroy the extents here -- there may still be children
|
|
|
1333 extents pointing to the extents. */
|
|
771
|
1334 detach_all_extents (wrap_buffer (b));
|
|
428
|
1335 finalize_extent_info (data, 0);
|
|
|
1336 }
|
|
|
1337
|
|
|
1338 /* Retrieve the extent list that an extent is a member of; the
|
|
|
1339 return value will never be 0 except in destroyed buffers (in which
|
|
|
1340 case the only extents that can refer to this buffer are detached
|
|
|
1341 ones). */
|
|
|
1342
|
|
|
1343 #define extent_extent_list(e) buffer_or_string_extent_list (extent_object (e))
|
|
|
1344
|
|
|
1345 /* ------------------------------- */
|
|
|
1346 /* stack of extents */
|
|
|
1347 /* ------------------------------- */
|
|
|
1348
|
|
|
1349 #ifdef ERROR_CHECK_EXTENTS
|
|
|
1350
|
|
771
|
1351 /* See unicode.c for more about sledgehammer checks */
|
|
|
1352
|
|
428
|
1353 void
|
|
|
1354 sledgehammer_extent_check (Lisp_Object object)
|
|
|
1355 {
|
|
|
1356 int i;
|
|
|
1357 int endp;
|
|
|
1358 Extent_List *el = buffer_or_string_extent_list (object);
|
|
|
1359 struct buffer *buf = 0;
|
|
|
1360
|
|
|
1361 if (!el)
|
|
|
1362 return;
|
|
|
1363
|
|
|
1364 if (BUFFERP (object))
|
|
|
1365 buf = XBUFFER (object);
|
|
|
1366
|
|
|
1367 for (endp = 0; endp < 2; endp++)
|
|
|
1368 for (i = 1; i < extent_list_num_els (el); i++)
|
|
|
1369 {
|
|
|
1370 EXTENT e1 = extent_list_at (el, i-1, endp);
|
|
|
1371 EXTENT e2 = extent_list_at (el, i, endp);
|
|
|
1372 if (buf)
|
|
|
1373 {
|
|
|
1374 assert (extent_start (e1) <= buf->text->gpt ||
|
|
|
1375 extent_start (e1) > buf->text->gpt + buf->text->gap_size);
|
|
|
1376 assert (extent_end (e1) <= buf->text->gpt ||
|
|
|
1377 extent_end (e1) > buf->text->gpt + buf->text->gap_size);
|
|
|
1378 }
|
|
|
1379 assert (extent_start (e1) <= extent_end (e1));
|
|
|
1380 assert (endp ? (EXTENT_E_LESS_EQUAL (e1, e2)) :
|
|
|
1381 (EXTENT_LESS_EQUAL (e1, e2)));
|
|
|
1382 }
|
|
|
1383 }
|
|
|
1384
|
|
|
1385 #endif
|
|
|
1386
|
|
|
1387 static Stack_Of_Extents *
|
|
|
1388 buffer_or_string_stack_of_extents (Lisp_Object object)
|
|
|
1389 {
|
|
|
1390 struct extent_info *info = buffer_or_string_extent_info (object);
|
|
|
1391 if (!info)
|
|
|
1392 return 0;
|
|
|
1393 return info->soe;
|
|
|
1394 }
|
|
|
1395
|
|
|
1396 static Stack_Of_Extents *
|
|
|
1397 buffer_or_string_stack_of_extents_force (Lisp_Object object)
|
|
|
1398 {
|
|
|
1399 struct extent_info *info = buffer_or_string_extent_info_force (object);
|
|
|
1400 if (!info->soe)
|
|
|
1401 info->soe = allocate_soe ();
|
|
|
1402 return info->soe;
|
|
|
1403 }
|
|
|
1404
|
|
983
|
1405 /* #### don't even think of #define'ing this, the prototype of
|
|
|
1406 print_extent_1 has changed! */
|
|
428
|
1407 /* #define SOE_DEBUG */
|
|
|
1408
|
|
|
1409 #ifdef SOE_DEBUG
|
|
|
1410
|
|
|
1411 static void print_extent_1 (char *buf, Lisp_Object extent);
|
|
|
1412
|
|
|
1413 static void
|
|
|
1414 print_extent_2 (EXTENT e)
|
|
|
1415 {
|
|
|
1416 Lisp_Object extent;
|
|
|
1417 char buf[200];
|
|
|
1418
|
|
793
|
1419 extent = wrap_extent (e);
|
|
428
|
1420 print_extent_1 (buf, extent);
|
|
|
1421 fputs (buf, stdout);
|
|
|
1422 }
|
|
|
1423
|
|
|
1424 static void
|
|
|
1425 soe_dump (Lisp_Object obj)
|
|
|
1426 {
|
|
|
1427 int i;
|
|
|
1428 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (obj);
|
|
|
1429 Extent_List *sel;
|
|
|
1430 int endp;
|
|
|
1431
|
|
|
1432 if (!soe)
|
|
|
1433 {
|
|
|
1434 printf ("No SOE");
|
|
|
1435 return;
|
|
|
1436 }
|
|
|
1437 sel = soe->extents;
|
|
826
|
1438 printf ("SOE pos is %d (memxpos %d)\n",
|
|
428
|
1439 soe->pos < 0 ? soe->pos :
|
|
826
|
1440 buffer_or_string_memxpos_to_bytexpos (obj, soe->pos),
|
|
428
|
1441 soe->pos);
|
|
|
1442 for (endp = 0; endp < 2; endp++)
|
|
|
1443 {
|
|
|
1444 printf (endp ? "SOE end:" : "SOE start:");
|
|
|
1445 for (i = 0; i < extent_list_num_els (sel); i++)
|
|
|
1446 {
|
|
|
1447 EXTENT e = extent_list_at (sel, i, endp);
|
|
|
1448 putchar ('\t');
|
|
|
1449 print_extent_2 (e);
|
|
|
1450 }
|
|
|
1451 putchar ('\n');
|
|
|
1452 }
|
|
|
1453 putchar ('\n');
|
|
|
1454 }
|
|
|
1455
|
|
|
1456 #endif
|
|
|
1457
|
|
|
1458 /* Insert EXTENT into OBJ's stack of extents, if necessary. */
|
|
|
1459
|
|
|
1460 static void
|
|
|
1461 soe_insert (Lisp_Object obj, EXTENT extent)
|
|
|
1462 {
|
|
|
1463 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (obj);
|
|
|
1464
|
|
|
1465 #ifdef SOE_DEBUG
|
|
|
1466 printf ("Inserting into SOE: ");
|
|
|
1467 print_extent_2 (extent);
|
|
|
1468 putchar ('\n');
|
|
|
1469 #endif
|
|
|
1470 if (!soe || soe->pos < extent_start (extent) ||
|
|
|
1471 soe->pos > extent_end (extent))
|
|
|
1472 {
|
|
|
1473 #ifdef SOE_DEBUG
|
|
|
1474 printf ("(not needed)\n\n");
|
|
|
1475 #endif
|
|
|
1476 return;
|
|
|
1477 }
|
|
|
1478 extent_list_insert (soe->extents, extent);
|
|
|
1479 #ifdef SOE_DEBUG
|
|
|
1480 puts ("SOE afterwards is:");
|
|
|
1481 soe_dump (obj);
|
|
|
1482 #endif
|
|
|
1483 }
|
|
|
1484
|
|
|
1485 /* Delete EXTENT from OBJ's stack of extents, if necessary. */
|
|
|
1486
|
|
|
1487 static void
|
|
|
1488 soe_delete (Lisp_Object obj, EXTENT extent)
|
|
|
1489 {
|
|
|
1490 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (obj);
|
|
|
1491
|
|
|
1492 #ifdef SOE_DEBUG
|
|
|
1493 printf ("Deleting from SOE: ");
|
|
|
1494 print_extent_2 (extent);
|
|
|
1495 putchar ('\n');
|
|
|
1496 #endif
|
|
|
1497 if (!soe || soe->pos < extent_start (extent) ||
|
|
|
1498 soe->pos > extent_end (extent))
|
|
|
1499 {
|
|
|
1500 #ifdef SOE_DEBUG
|
|
|
1501 puts ("(not needed)\n");
|
|
|
1502 #endif
|
|
|
1503 return;
|
|
|
1504 }
|
|
|
1505 extent_list_delete (soe->extents, extent);
|
|
|
1506 #ifdef SOE_DEBUG
|
|
|
1507 puts ("SOE afterwards is:");
|
|
|
1508 soe_dump (obj);
|
|
|
1509 #endif
|
|
|
1510 }
|
|
|
1511
|
|
|
1512 /* Move OBJ's stack of extents to lie over the specified position. */
|
|
|
1513
|
|
|
1514 static void
|
|
826
|
1515 soe_move (Lisp_Object obj, Memxpos pos)
|
|
428
|
1516 {
|
|
|
1517 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents_force (obj);
|
|
|
1518 Extent_List *sel = soe->extents;
|
|
|
1519 int numsoe = extent_list_num_els (sel);
|
|
|
1520 Extent_List *bel = buffer_or_string_extent_list (obj);
|
|
|
1521 int direction;
|
|
|
1522 int endp;
|
|
|
1523
|
|
|
1524 #ifdef ERROR_CHECK_EXTENTS
|
|
|
1525 assert (bel);
|
|
|
1526 #endif
|
|
|
1527
|
|
|
1528 #ifdef SOE_DEBUG
|
|
826
|
1529 printf ("Moving SOE from %d (memxpos %d) to %d (memxpos %d)\n",
|
|
428
|
1530 soe->pos < 0 ? soe->pos :
|
|
826
|
1531 buffer_or_string_memxpos_to_bytexpos (obj, soe->pos), soe->pos,
|
|
|
1532 buffer_or_string_memxpos_to_bytexpos (obj, pos), pos);
|
|
428
|
1533 #endif
|
|
|
1534 if (soe->pos < pos)
|
|
|
1535 {
|
|
|
1536 direction = 1;
|
|
|
1537 endp = 0;
|
|
|
1538 }
|
|
|
1539 else if (soe->pos > pos)
|
|
|
1540 {
|
|
|
1541 direction = -1;
|
|
|
1542 endp = 1;
|
|
|
1543 }
|
|
|
1544 else
|
|
|
1545 {
|
|
|
1546 #ifdef SOE_DEBUG
|
|
|
1547 puts ("(not needed)\n");
|
|
|
1548 #endif
|
|
|
1549 return;
|
|
|
1550 }
|
|
|
1551
|
|
|
1552 /* For DIRECTION = 1: Any extent that overlaps POS is either in the
|
|
|
1553 SOE (if the extent starts at or before SOE->POS) or is greater
|
|
|
1554 (in the display order) than any extent in the SOE (if it starts
|
|
|
1555 after SOE->POS).
|
|
|
1556
|
|
|
1557 For DIRECTION = -1: Any extent that overlaps POS is either in the
|
|
|
1558 SOE (if the extent ends at or after SOE->POS) or is less (in the
|
|
|
1559 e-order) than any extent in the SOE (if it ends before SOE->POS).
|
|
|
1560
|
|
|
1561 We proceed in two stages:
|
|
|
1562
|
|
|
1563 1) delete all extents in the SOE that don't overlap POS.
|
|
|
1564 2) insert all extents into the SOE that start (or end, when
|
|
|
1565 DIRECTION = -1) in (SOE->POS, POS] and that overlap
|
|
|
1566 POS. (Don't include SOE->POS in the range because those
|
|
|
1567 extents would already be in the SOE.)
|
|
|
1568 */
|
|
|
1569
|
|
|
1570 /* STAGE 1. */
|
|
|
1571
|
|
|
1572 if (numsoe > 0)
|
|
|
1573 {
|
|
|
1574 /* Delete all extents in the SOE that don't overlap POS.
|
|
|
1575 This is all extents that end before (or start after,
|
|
|
1576 if DIRECTION = -1) POS.
|
|
|
1577 */
|
|
|
1578
|
|
|
1579 /* Deleting extents from the SOE is tricky because it changes
|
|
|
1580 the positions of extents. If we are deleting in the forward
|
|
|
1581 direction we have to call extent_list_at() on the same position
|
|
|
1582 over and over again because positions after the deleted element
|
|
|
1583 get shifted back by 1. To make life simplest, we delete forward
|
|
|
1584 irrespective of DIRECTION.
|
|
|
1585 */
|
|
|
1586 int start, end;
|
|
|
1587 int i;
|
|
|
1588
|
|
|
1589 if (direction > 0)
|
|
|
1590 {
|
|
|
1591 start = 0;
|
|
|
1592 end = extent_list_locate_from_pos (sel, pos, 1);
|
|
|
1593 }
|
|
|
1594 else
|
|
|
1595 {
|
|
|
1596 start = extent_list_locate_from_pos (sel, pos+1, 0);
|
|
|
1597 end = numsoe;
|
|
|
1598 }
|
|
|
1599
|
|
|
1600 for (i = start; i < end; i++)
|
|
|
1601 extent_list_delete (sel, extent_list_at (sel, start /* see above */,
|
|
|
1602 !endp));
|
|
|
1603 }
|
|
|
1604
|
|
|
1605 /* STAGE 2. */
|
|
|
1606
|
|
|
1607 {
|
|
|
1608 int start_pos;
|
|
|
1609
|
|
|
1610 if (direction < 0)
|
|
|
1611 start_pos = extent_list_locate_from_pos (bel, soe->pos, endp) - 1;
|
|
|
1612 else
|
|
|
1613 start_pos = extent_list_locate_from_pos (bel, soe->pos + 1, endp);
|
|
|
1614
|
|
|
1615 for (; start_pos >= 0 && start_pos < extent_list_num_els (bel);
|
|
|
1616 start_pos += direction)
|
|
|
1617 {
|
|
|
1618 EXTENT e = extent_list_at (bel, start_pos, endp);
|
|
|
1619 if ((direction > 0) ?
|
|
|
1620 (extent_start (e) > pos) :
|
|
|
1621 (extent_end (e) < pos))
|
|
|
1622 break; /* All further extents lie on the far side of POS
|
|
|
1623 and thus can't overlap. */
|
|
|
1624 if ((direction > 0) ?
|
|
|
1625 (extent_end (e) >= pos) :
|
|
|
1626 (extent_start (e) <= pos))
|
|
|
1627 extent_list_insert (sel, e);
|
|
|
1628 }
|
|
|
1629 }
|
|
|
1630
|
|
|
1631 soe->pos = pos;
|
|
|
1632 #ifdef SOE_DEBUG
|
|
|
1633 puts ("SOE afterwards is:");
|
|
|
1634 soe_dump (obj);
|
|
|
1635 #endif
|
|
|
1636 }
|
|
|
1637
|
|
|
1638 static void
|
|
|
1639 soe_invalidate (Lisp_Object obj)
|
|
|
1640 {
|
|
|
1641 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (obj);
|
|
|
1642
|
|
|
1643 if (soe)
|
|
|
1644 {
|
|
|
1645 extent_list_delete_all (soe->extents);
|
|
|
1646 soe->pos = -1;
|
|
|
1647 }
|
|
|
1648 }
|
|
|
1649
|
|
|
1650 static struct stack_of_extents *
|
|
|
1651 allocate_soe (void)
|
|
|
1652 {
|
|
|
1653 struct stack_of_extents *soe = xnew_and_zero (struct stack_of_extents);
|
|
|
1654 soe->extents = allocate_extent_list ();
|
|
|
1655 soe->pos = -1;
|
|
|
1656 return soe;
|
|
|
1657 }
|
|
|
1658
|
|
|
1659 static void
|
|
|
1660 free_soe (struct stack_of_extents *soe)
|
|
|
1661 {
|
|
|
1662 free_extent_list (soe->extents);
|
|
|
1663 xfree (soe);
|
|
|
1664 }
|
|
|
1665
|
|
|
1666 /* ------------------------------- */
|
|
|
1667 /* other primitives */
|
|
|
1668 /* ------------------------------- */
|
|
|
1669
|
|
|
1670 /* Return the start (endp == 0) or end (endp == 1) of an extent as
|
|
|
1671 a byte index. If you want the value as a memory index, use
|
|
|
1672 extent_endpoint(). If you want the value as a buffer position,
|
|
826
|
1673 use extent_endpoint_char(). */
|
|
|
1674
|
|
|
1675 Bytexpos
|
|
|
1676 extent_endpoint_byte (EXTENT extent, int endp)
|
|
|
1677 {
|
|
|
1678 assert (EXTENT_LIVE_P (extent));
|
|
|
1679 assert (!extent_detached_p (extent));
|
|
|
1680 {
|
|
|
1681 Memxpos i = endp ? extent_end (extent) : extent_start (extent);
|
|
|
1682 Lisp_Object obj = extent_object (extent);
|
|
|
1683 return buffer_or_string_memxpos_to_bytexpos (obj, i);
|
|
|
1684 }
|
|
|
1685 }
|
|
|
1686
|
|
|
1687 Charxpos
|
|
|
1688 extent_endpoint_char (EXTENT extent, int endp)
|
|
428
|
1689 {
|
|
|
1690 assert (EXTENT_LIVE_P (extent));
|
|
|
1691 assert (!extent_detached_p (extent));
|
|
|
1692 {
|
|
826
|
1693 Memxpos i = endp ? extent_end (extent) : extent_start (extent);
|
|
428
|
1694 Lisp_Object obj = extent_object (extent);
|
|
826
|
1695 return buffer_or_string_memxpos_to_charxpos (obj, i);
|
|
428
|
1696 }
|
|
|
1697 }
|
|
|
1698
|
|
|
1699 static void
|
|
826
|
1700 signal_single_extent_changed (EXTENT extent, Lisp_Object property,
|
|
|
1701 Bytexpos old_start, Bytexpos old_end)
|
|
|
1702 {
|
|
|
1703 EXTENT anc = extent_ancestor (extent);
|
|
|
1704 /* Redisplay checks */
|
|
|
1705 if (NILP (property) ?
|
|
|
1706 (!NILP (extent_face (anc)) ||
|
|
|
1707 !NILP (extent_begin_glyph (anc)) ||
|
|
|
1708 !NILP (extent_end_glyph (anc)) ||
|
|
|
1709 !NILP (extent_mouse_face (anc)) ||
|
|
|
1710 !NILP (extent_invisible (anc)) ||
|
|
|
1711 !NILP (extent_initial_redisplay_function (anc))) :
|
|
|
1712 EQ (property, Qface) ||
|
|
|
1713 EQ (property, Qmouse_face) ||
|
|
|
1714 EQ (property, Qbegin_glyph) ||
|
|
|
1715 EQ (property, Qend_glyph) ||
|
|
|
1716 EQ (property, Qbegin_glyph_layout) ||
|
|
|
1717 EQ (property, Qend_glyph_layout) ||
|
|
|
1718 EQ (property, Qinvisible) ||
|
|
|
1719 EQ (property, Qinitial_redisplay_function) ||
|
|
|
1720 EQ (property, Qpriority))
|
|
|
1721 {
|
|
|
1722 Lisp_Object object = extent_object (extent);
|
|
|
1723
|
|
|
1724 if (extent_detached_p (extent))
|
|
|
1725 return;
|
|
|
1726
|
|
|
1727 else if (STRINGP (object))
|
|
|
1728 {
|
|
|
1729 /* #### Changes to string extents can affect redisplay if they are
|
|
|
1730 in the modeline or in the gutters.
|
|
|
1731
|
|
|
1732 If the extent is in some generated-modeline-string: when we
|
|
|
1733 change an extent in generated-modeline-string, this changes its
|
|
|
1734 parent, which is in `modeline-format', so we should force the
|
|
|
1735 modeline to be updated. But how to determine whether a string
|
|
|
1736 is a `generated-modeline-string'? Looping through all buffers
|
|
|
1737 is not very efficient. Should we add all
|
|
|
1738 `generated-modeline-string' strings to a hash table? Maybe
|
|
|
1739 efficiency is not the greatest concern here and there's no big
|
|
|
1740 loss in looping over the buffers.
|
|
|
1741
|
|
|
1742 If the extent is in a gutter we mark the gutter as
|
|
|
1743 changed. This means (a) we can update extents in the gutters
|
|
|
1744 when we need it. (b) we don't have to update the gutters when
|
|
|
1745 only extents attached to buffers have changed. */
|
|
|
1746
|
|
|
1747 if (!in_modeline_generation)
|
|
|
1748 MARK_EXTENTS_CHANGED;
|
|
|
1749 gutter_extent_signal_changed_region_maybe
|
|
|
1750 (object, extent_endpoint_char (extent, 0),
|
|
|
1751 extent_endpoint_char (extent, 1));
|
|
|
1752 }
|
|
|
1753 else if (BUFFERP (object))
|
|
|
1754 {
|
|
|
1755 struct buffer *b;
|
|
|
1756 b = XBUFFER (object);
|
|
|
1757 BUF_FACECHANGE (b)++;
|
|
|
1758 MARK_EXTENTS_CHANGED;
|
|
|
1759 if (NILP (property) ? !NILP (extent_invisible (anc)) :
|
|
|
1760 EQ (property, Qinvisible))
|
|
|
1761 MARK_CLIP_CHANGED;
|
|
|
1762 buffer_extent_signal_changed_region
|
|
|
1763 (b, extent_endpoint_char (extent, 0),
|
|
|
1764 extent_endpoint_char (extent, 1));
|
|
|
1765 }
|
|
|
1766 }
|
|
|
1767
|
|
|
1768 /* Check for syntax table property change */
|
|
|
1769 if (NILP (property) ? !NILP (Fextent_property (wrap_extent (extent),
|
|
|
1770 Qsyntax_table, Qnil)) :
|
|
|
1771 EQ (property, Qsyntax_table))
|
|
|
1772 signal_syntax_table_extent_changed (extent);
|
|
|
1773 }
|
|
|
1774
|
|
|
1775 /* Make note that a change has happened in EXTENT. The change was either
|
|
|
1776 to a property or to the endpoints (but not both at once). If PROPERTY
|
|
|
1777 is non-nil, the change happened to that property; otherwise, the change
|
|
|
1778 happened to the endpoints, and the old ones are given. Currently, all
|
|
|
1779 endpoints changes are in the form of two signals, a detach followed by
|
|
|
1780 an attach, and when detaching, we are signalled before the extent is
|
|
|
1781 detached. (You can distinguish a detach from an attach because the
|
|
|
1782 latter has old_start == -1 and old_end == -1.) (#### We don't currently
|
|
|
1783 give the old property. If someone needs that, this will have to
|
|
|
1784 change.) KLUDGE: If PROPERTY is Qt, all properties may have changed
|
|
|
1785 because the parent was changed. #### We need to handle this properly, by
|
|
|
1786 mapping over properties. */
|
|
|
1787
|
|
|
1788 static void
|
|
|
1789 signal_extent_changed (EXTENT extent, Lisp_Object property,
|
|
|
1790 Bytexpos old_start, Bytexpos old_end,
|
|
|
1791 int descendants_too)
|
|
|
1792 {
|
|
428
|
1793 /* we could easily encounter a detached extent while traversing the
|
|
|
1794 children, but we should never be able to encounter a dead extent. */
|
|
|
1795 assert (EXTENT_LIVE_P (extent));
|
|
|
1796
|
|
|
1797 if (descendants_too)
|
|
|
1798 {
|
|
|
1799 Lisp_Object children = extent_children (extent);
|
|
|
1800
|
|
|
1801 if (!NILP (children))
|
|
|
1802 {
|
|
826
|
1803 /* first process all of the extent's children. We will lose
|
|
|
1804 big-time if there are any circularities here, so we sure as
|
|
|
1805 hell better ensure that there aren't. */
|
|
831
|
1806 LIST_LOOP_2 (child, XWEAK_LIST_LIST (children))
|
|
|
1807 signal_extent_changed (XEXTENT (child), property, old_start,
|
|
840
|
1808 old_end, descendants_too);
|
|
428
|
1809 }
|
|
|
1810 }
|
|
|
1811
|
|
826
|
1812 /* now process the extent itself. */
|
|
|
1813 signal_single_extent_changed (extent, property, old_start, old_end);
|
|
|
1814 }
|
|
428
|
1815
|
|
|
1816 static void
|
|
826
|
1817 signal_extent_property_changed (EXTENT extent, Lisp_Object property,
|
|
|
1818 int descendants_too)
|
|
|
1819 {
|
|
|
1820 signal_extent_changed (extent, property, 0, 0, descendants_too);
|
|
428
|
1821 }
|
|
|
1822
|
|
|
1823 static EXTENT
|
|
|
1824 make_extent_detached (Lisp_Object object)
|
|
|
1825 {
|
|
|
1826 EXTENT extent = allocate_extent ();
|
|
|
1827
|
|
|
1828 assert (NILP (object) || STRINGP (object) ||
|
|
|
1829 (BUFFERP (object) && BUFFER_LIVE_P (XBUFFER (object))));
|
|
|
1830 extent_object (extent) = object;
|
|
|
1831 /* Now make sure the extent info exists. */
|
|
|
1832 if (!NILP (object))
|
|
|
1833 buffer_or_string_extent_info_force (object);
|
|
|
1834 return extent;
|
|
|
1835 }
|
|
|
1836
|
|
|
1837 /* A "real" extent is any extent other than the internal (not-user-visible)
|
|
|
1838 extents used by `map-extents'. */
|
|
|
1839
|
|
|
1840 static EXTENT
|
|
|
1841 real_extent_at_forward (Extent_List *el, int pos, int endp)
|
|
|
1842 {
|
|
|
1843 for (; pos < extent_list_num_els (el); pos++)
|
|
|
1844 {
|
|
|
1845 EXTENT e = extent_list_at (el, pos, endp);
|
|
|
1846 if (!extent_internal_p (e))
|
|
|
1847 return e;
|
|
|
1848 }
|
|
|
1849 return 0;
|
|
|
1850 }
|
|
|
1851
|
|
|
1852 static EXTENT
|
|
|
1853 real_extent_at_backward (Extent_List *el, int pos, int endp)
|
|
|
1854 {
|
|
|
1855 for (; pos >= 0; pos--)
|
|
|
1856 {
|
|
|
1857 EXTENT e = extent_list_at (el, pos, endp);
|
|
|
1858 if (!extent_internal_p (e))
|
|
|
1859 return e;
|
|
|
1860 }
|
|
|
1861 return 0;
|
|
|
1862 }
|
|
|
1863
|
|
|
1864 static EXTENT
|
|
|
1865 extent_first (Lisp_Object obj)
|
|
|
1866 {
|
|
|
1867 Extent_List *el = buffer_or_string_extent_list (obj);
|
|
|
1868
|
|
|
1869 if (!el)
|
|
|
1870 return 0;
|
|
|
1871 return real_extent_at_forward (el, 0, 0);
|
|
|
1872 }
|
|
|
1873
|
|
|
1874 #ifdef DEBUG_XEMACS
|
|
|
1875 static EXTENT
|
|
|
1876 extent_e_first (Lisp_Object obj)
|
|
|
1877 {
|
|
|
1878 Extent_List *el = buffer_or_string_extent_list (obj);
|
|
|
1879
|
|
|
1880 if (!el)
|
|
|
1881 return 0;
|
|
|
1882 return real_extent_at_forward (el, 0, 1);
|
|
|
1883 }
|
|
|
1884 #endif
|
|
|
1885
|
|
|
1886 static EXTENT
|
|
|
1887 extent_next (EXTENT e)
|
|
|
1888 {
|
|
|
1889 Extent_List *el = extent_extent_list (e);
|
|
|
1890 int foundp;
|
|
|
1891 int pos = extent_list_locate (el, e, 0, &foundp);
|
|
|
1892 assert (foundp);
|
|
|
1893 return real_extent_at_forward (el, pos+1, 0);
|
|
|
1894 }
|
|
|
1895
|
|
|
1896 #ifdef DEBUG_XEMACS
|
|
|
1897 static EXTENT
|
|
|
1898 extent_e_next (EXTENT e)
|
|
|
1899 {
|
|
|
1900 Extent_List *el = extent_extent_list (e);
|
|
|
1901 int foundp;
|
|
|
1902 int pos = extent_list_locate (el, e, 1, &foundp);
|
|
|
1903 assert (foundp);
|
|
|
1904 return real_extent_at_forward (el, pos+1, 1);
|
|
|
1905 }
|
|
|
1906 #endif
|
|
|
1907
|
|
|
1908 static EXTENT
|
|
|
1909 extent_last (Lisp_Object obj)
|
|
|
1910 {
|
|
|
1911 Extent_List *el = buffer_or_string_extent_list (obj);
|
|
|
1912
|
|
|
1913 if (!el)
|
|
|
1914 return 0;
|
|
|
1915 return real_extent_at_backward (el, extent_list_num_els (el) - 1, 0);
|
|
|
1916 }
|
|
|
1917
|
|
|
1918 #ifdef DEBUG_XEMACS
|
|
|
1919 static EXTENT
|
|
|
1920 extent_e_last (Lisp_Object obj)
|
|
|
1921 {
|
|
|
1922 Extent_List *el = buffer_or_string_extent_list (obj);
|
|
|
1923
|
|
|
1924 if (!el)
|
|
|
1925 return 0;
|
|
|
1926 return real_extent_at_backward (el, extent_list_num_els (el) - 1, 1);
|
|
|
1927 }
|
|
|
1928 #endif
|
|
|
1929
|
|
|
1930 static EXTENT
|
|
|
1931 extent_previous (EXTENT e)
|
|
|
1932 {
|
|
|
1933 Extent_List *el = extent_extent_list (e);
|
|
|
1934 int foundp;
|
|
|
1935 int pos = extent_list_locate (el, e, 0, &foundp);
|
|
|
1936 assert (foundp);
|
|
|
1937 return real_extent_at_backward (el, pos-1, 0);
|
|
|
1938 }
|
|
|
1939
|
|
|
1940 #ifdef DEBUG_XEMACS
|
|
|
1941 static EXTENT
|
|
|
1942 extent_e_previous (EXTENT e)
|
|
|
1943 {
|
|
|
1944 Extent_List *el = extent_extent_list (e);
|
|
|
1945 int foundp;
|
|
|
1946 int pos = extent_list_locate (el, e, 1, &foundp);
|
|
|
1947 assert (foundp);
|
|
|
1948 return real_extent_at_backward (el, pos-1, 1);
|
|
|
1949 }
|
|
|
1950 #endif
|
|
|
1951
|
|
|
1952 static void
|
|
|
1953 extent_attach (EXTENT extent)
|
|
|
1954 {
|
|
|
1955 Extent_List *el = extent_extent_list (extent);
|
|
|
1956
|
|
|
1957 extent_list_insert (el, extent);
|
|
|
1958 soe_insert (extent_object (extent), extent);
|
|
|
1959 /* only this extent changed */
|
|
826
|
1960 signal_extent_changed (extent, Qnil, -1, -1, 0);
|
|
428
|
1961 }
|
|
|
1962
|
|
|
1963 static void
|
|
|
1964 extent_detach (EXTENT extent)
|
|
|
1965 {
|
|
|
1966 Extent_List *el;
|
|
|
1967
|
|
|
1968 if (extent_detached_p (extent))
|
|
|
1969 return;
|
|
|
1970 el = extent_extent_list (extent);
|
|
|
1971
|
|
|
1972 /* call this before messing with the extent. */
|
|
826
|
1973 signal_extent_changed (extent, Qnil,
|
|
|
1974 extent_endpoint_byte (extent, 0),
|
|
|
1975 extent_endpoint_char (extent, 0),
|
|
|
1976 0);
|
|
428
|
1977 extent_list_delete (el, extent);
|
|
|
1978 soe_delete (extent_object (extent), extent);
|
|
|
1979 set_extent_start (extent, -1);
|
|
|
1980 set_extent_end (extent, -1);
|
|
|
1981 }
|
|
|
1982
|
|
|
1983 /* ------------------------------- */
|
|
|
1984 /* map-extents et al. */
|
|
|
1985 /* ------------------------------- */
|
|
|
1986
|
|
|
1987 /* Returns true iff map_extents() would visit the given extent.
|
|
|
1988 See the comments at map_extents() for info on the overlap rule.
|
|
|
1989 Assumes that all validation on the extent and buffer positions has
|
|
|
1990 already been performed (see Fextent_in_region_p ()).
|
|
|
1991 */
|
|
|
1992 static int
|
|
826
|
1993 extent_in_region_p (EXTENT extent, Bytexpos from, Bytexpos to,
|
|
428
|
1994 unsigned int flags)
|
|
|
1995 {
|
|
|
1996 Lisp_Object obj = extent_object (extent);
|
|
|
1997 Endpoint_Index start, end, exs, exe;
|
|
|
1998 int start_open, end_open;
|
|
|
1999 unsigned int all_extents_flags = flags & ME_ALL_EXTENTS_MASK;
|
|
|
2000 unsigned int in_region_flags = flags & ME_IN_REGION_MASK;
|
|
|
2001 int retval;
|
|
|
2002
|
|
|
2003 /* A zero-length region is treated as closed-closed. */
|
|
|
2004 if (from == to)
|
|
|
2005 {
|
|
|
2006 flags |= ME_END_CLOSED;
|
|
|
2007 flags &= ~ME_START_OPEN;
|
|
|
2008 }
|
|
|
2009
|
|
|
2010 /* So is a zero-length extent. */
|
|
|
2011 if (extent_start (extent) == extent_end (extent))
|
|
|
2012 start_open = 0, end_open = 0;
|
|
|
2013 /* `all_extents_flags' will almost always be zero. */
|
|
|
2014 else if (all_extents_flags == 0)
|
|
|
2015 {
|
|
|
2016 start_open = extent_start_open_p (extent);
|
|
|
2017 end_open = extent_end_open_p (extent);
|
|
|
2018 }
|
|
|
2019 else
|
|
|
2020 switch (all_extents_flags)
|
|
|
2021 {
|
|
|
2022 case ME_ALL_EXTENTS_CLOSED: start_open = 0, end_open = 0; break;
|
|
|
2023 case ME_ALL_EXTENTS_OPEN: start_open = 1, end_open = 1; break;
|
|
|
2024 case ME_ALL_EXTENTS_CLOSED_OPEN: start_open = 0, end_open = 1; break;
|
|
|
2025 case ME_ALL_EXTENTS_OPEN_CLOSED: start_open = 1, end_open = 0; break;
|
|
442
|
2026 default: abort(); return 0;
|
|
428
|
2027 }
|
|
|
2028
|
|
826
|
2029 start = buffer_or_string_bytexpos_to_startind (obj, from,
|
|
428
|
2030 flags & ME_START_OPEN);
|
|
826
|
2031 end = buffer_or_string_bytexpos_to_endind (obj, to,
|
|
|
2032 ! (flags & ME_END_CLOSED));
|
|
|
2033 exs = memxpos_to_startind (extent_start (extent), start_open);
|
|
|
2034 exe = memxpos_to_endind (extent_end (extent), end_open);
|
|
428
|
2035
|
|
|
2036 /* It's easy to determine whether an extent lies *outside* the
|
|
|
2037 region -- just determine whether it's completely before
|
|
|
2038 or completely after the region. Reject all such extents, so
|
|
|
2039 we're now left with only the extents that overlap the region.
|
|
|
2040 */
|
|
|
2041
|
|
|
2042 if (exs > end || exe < start)
|
|
|
2043 return 0;
|
|
|
2044
|
|
|
2045 /* See if any further restrictions are called for. */
|
|
|
2046 /* in_region_flags will almost always be zero. */
|
|
|
2047 if (in_region_flags == 0)
|
|
|
2048 retval = 1;
|
|
|
2049 else
|
|
|
2050 switch (in_region_flags)
|
|
|
2051 {
|
|
|
2052 case ME_START_IN_REGION:
|
|
|
2053 retval = start <= exs && exs <= end; break;
|
|
|
2054 case ME_END_IN_REGION:
|
|
|
2055 retval = start <= exe && exe <= end; break;
|
|
|
2056 case ME_START_AND_END_IN_REGION:
|
|
|
2057 retval = start <= exs && exe <= end; break;
|
|
|
2058 case ME_START_OR_END_IN_REGION:
|
|
|
2059 retval = (start <= exs && exs <= end) || (start <= exe && exe <= end);
|
|
|
2060 break;
|
|
|
2061 default:
|
|
442
|
2062 abort(); return 0;
|
|
428
|
2063 }
|
|
|
2064 return flags & ME_NEGATE_IN_REGION ? !retval : retval;
|
|
|
2065 }
|
|
|
2066
|
|
|
2067 struct map_extents_struct
|
|
|
2068 {
|
|
|
2069 Extent_List *el;
|
|
|
2070 Extent_List_Marker *mkr;
|
|
|
2071 EXTENT range;
|
|
|
2072 };
|
|
|
2073
|
|
|
2074 static Lisp_Object
|
|
|
2075 map_extents_unwind (Lisp_Object obj)
|
|
|
2076 {
|
|
|
2077 struct map_extents_struct *closure =
|
|
|
2078 (struct map_extents_struct *) get_opaque_ptr (obj);
|
|
|
2079 free_opaque_ptr (obj);
|
|
|
2080 if (closure->range)
|
|
|
2081 extent_detach (closure->range);
|
|
|
2082 if (closure->mkr)
|
|
|
2083 extent_list_delete_marker (closure->el, closure->mkr);
|
|
|
2084 return Qnil;
|
|
|
2085 }
|
|
|
2086
|
|
|
2087 /* This is the guts of `map-extents' and the other functions that
|
|
|
2088 map over extents. In theory the operation of this function is
|
|
|
2089 simple: just figure out what extents we're mapping over, and
|
|
|
2090 call the function on each one of them in the range. Unfortunately
|
|
|
2091 there are a wide variety of things that the mapping function
|
|
|
2092 might do, and we have to be very tricky to avoid getting messed
|
|
|
2093 up. Furthermore, this function needs to be very fast (it is
|
|
|
2094 called multiple times every time text is inserted or deleted
|
|
|
2095 from a buffer), and so we can't always afford the overhead of
|
|
|
2096 dealing with all the possible things that the mapping function
|
|
|
2097 might do; thus, there are many flags that can be specified
|
|
|
2098 indicating what the mapping function might or might not do.
|
|
|
2099
|
|
|
2100 The result of all this is that this is the most complicated
|
|
|
2101 function in this file. Change it at your own risk!
|
|
|
2102
|
|
|
2103 A potential simplification to the logic below is to determine
|
|
|
2104 all the extents that the mapping function should be called on
|
|
|
2105 before any calls are actually made and save them in an array.
|
|
|
2106 That introduces its own complications, however (the array
|
|
|
2107 needs to be marked for garbage-collection, and a static array
|
|
|
2108 cannot be used because map_extents() needs to be reentrant).
|
|
|
2109 Furthermore, the results might be a little less sensible than
|
|
|
2110 the logic below. */
|
|
|
2111
|
|
|
2112
|
|
|
2113 static void
|
|
826
|
2114 map_extents (Bytexpos from, Bytexpos to, map_extents_fun fn,
|
|
|
2115 void *arg, Lisp_Object obj, EXTENT after,
|
|
|
2116 unsigned int flags)
|
|
|
2117 {
|
|
|
2118 Memxpos st, en; /* range we're mapping over */
|
|
428
|
2119 EXTENT range = 0; /* extent for this, if ME_MIGHT_MODIFY_TEXT */
|
|
|
2120 Extent_List *el = 0; /* extent list we're iterating over */
|
|
|
2121 Extent_List_Marker *posm = 0; /* marker for extent list,
|
|
|
2122 if ME_MIGHT_MODIFY_EXTENTS */
|
|
|
2123 /* count and struct for unwind-protect, if ME_MIGHT_THROW */
|
|
|
2124 int count = 0;
|
|
|
2125 struct map_extents_struct closure;
|
|
|
2126
|
|
|
2127 #ifdef ERROR_CHECK_EXTENTS
|
|
|
2128 assert (from <= to);
|
|
|
2129 assert (from >= buffer_or_string_absolute_begin_byte (obj) &&
|
|
|
2130 from <= buffer_or_string_absolute_end_byte (obj) &&
|
|
|
2131 to >= buffer_or_string_absolute_begin_byte (obj) &&
|
|
|
2132 to <= buffer_or_string_absolute_end_byte (obj));
|
|
|
2133 #endif
|
|
|
2134
|
|
|
2135 if (after)
|
|
|
2136 {
|
|
|
2137 assert (EQ (obj, extent_object (after)));
|
|
|
2138 assert (!extent_detached_p (after));
|
|
|
2139 }
|
|
|
2140
|
|
|
2141 el = buffer_or_string_extent_list (obj);
|
|
|
2142 if (!el || !extent_list_num_els(el))
|
|
|
2143 return;
|
|
|
2144 el = 0;
|
|
|
2145
|
|
826
|
2146 st = buffer_or_string_bytexpos_to_memxpos (obj, from);
|
|
|
2147 en = buffer_or_string_bytexpos_to_memxpos (obj, to);
|
|
428
|
2148
|
|
|
2149 if (flags & ME_MIGHT_MODIFY_TEXT)
|
|
|
2150 {
|
|
|
2151 /* The mapping function might change the text in the buffer,
|
|
|
2152 so make an internal extent to hold the range we're mapping
|
|
|
2153 over. */
|
|
|
2154 range = make_extent_detached (obj);
|
|
|
2155 set_extent_start (range, st);
|
|
|
2156 set_extent_end (range, en);
|
|
|
2157 range->flags.start_open = flags & ME_START_OPEN;
|
|
|
2158 range->flags.end_open = !(flags & ME_END_CLOSED);
|
|
|
2159 range->flags.internal = 1;
|
|
|
2160 range->flags.detachable = 0;
|
|
|
2161 extent_attach (range);
|
|
|
2162 }
|
|
|
2163
|
|
|
2164 if (flags & ME_MIGHT_THROW)
|
|
|
2165 {
|
|
|
2166 /* The mapping function might throw past us so we need to use an
|
|
|
2167 unwind_protect() to eliminate the internal extent and range
|
|
|
2168 that we use. */
|
|
|
2169 count = specpdl_depth ();
|
|
|
2170 closure.range = range;
|
|
|
2171 closure.mkr = 0;
|
|
|
2172 record_unwind_protect (map_extents_unwind,
|
|
|
2173 make_opaque_ptr (&closure));
|
|
|
2174 }
|
|
|
2175
|
|
|
2176 /* ---------- Figure out where we start and what direction
|
|
|
2177 we move in. This is the trickiest part of this
|
|
|
2178 function. ---------- */
|
|
|
2179
|
|
|
2180 /* If ME_START_IN_REGION, ME_END_IN_REGION or ME_START_AND_END_IN_REGION
|
|
|
2181 was specified and ME_NEGATE_IN_REGION was not specified, our job
|
|
|
2182 is simple because of the presence of the display order and e-order.
|
|
|
2183 (Note that theoretically do something similar for
|
|
|
2184 ME_START_OR_END_IN_REGION, but that would require more trickiness
|
|
|
2185 than it's worth to avoid hitting the same extent twice.)
|
|
|
2186
|
|
|
2187 In the general case, all the extents that overlap a range can be
|
|
|
2188 divided into two classes: those whose start position lies within
|
|
|
2189 the range (including the range's end but not including the
|
|
|
2190 range's start), and those that overlap the start position,
|
|
|
2191 i.e. those in the SOE for the start position. Or equivalently,
|
|
|
2192 the extents can be divided into those whose end position lies
|
|
|
2193 within the range and those in the SOE for the end position. Note
|
|
|
2194 that for this purpose we treat both the range and all extents in
|
|
|
2195 the buffer as closed on both ends. If this is not what the ME_
|
|
|
2196 flags specified, then we've mapped over a few too many extents,
|
|
|
2197 but no big deal because extent_in_region_p() will filter them
|
|
|
2198 out. Ideally, we could move the SOE to the closer of the range's
|
|
|
2199 two ends and work forwards or backwards from there. However, in
|
|
|
2200 order to make the semantics of the AFTER argument work out, we
|
|
|
2201 have to always go in the same direction; so we choose to always
|
|
|
2202 move the SOE to the start position.
|
|
|
2203
|
|
|
2204 When it comes time to do the SOE stage, we first call soe_move()
|
|
|
2205 so that the SOE gets set up. Note that the SOE might get
|
|
|
2206 changed while we are mapping over its contents. If we can
|
|
|
2207 guarantee that the SOE won't get moved to a new position, we
|
|
|
2208 simply need to put a marker in the SOE and we will track deletions
|
|
|
2209 and insertions of extents in the SOE. If the SOE might get moved,
|
|
|
2210 however (this would happen as a result of a recursive invocation
|
|
|
2211 of map-extents or a call to a redisplay-type function), then
|
|
|
2212 trying to track its changes is hopeless, so we just keep a
|
|
|
2213 marker to the first (or last) extent in the SOE and use that as
|
|
|
2214 our bound.
|
|
|
2215
|
|
|
2216 Finally, if DONT_USE_SOE is defined, we don't use the SOE at all
|
|
|
2217 and instead just map from the beginning of the buffer. This is
|
|
|
2218 used for testing purposes and allows the SOE to be calculated
|
|
|
2219 using map_extents() instead of the other way around. */
|
|
|
2220
|
|
|
2221 {
|
|
|
2222 int range_flag; /* ME_*_IN_REGION subset of flags */
|
|
|
2223 int do_soe_stage = 0; /* Are we mapping over the SOE? */
|
|
|
2224 /* Does the range stage map over start or end positions? */
|
|
|
2225 int range_endp;
|
|
|
2226 /* If type == 0, we include the start position in the range stage mapping.
|
|
|
2227 If type == 1, we exclude the start position in the range stage mapping.
|
|
|
2228 If type == 2, we begin at range_start_pos, an extent-list position.
|
|
|
2229 */
|
|
|
2230 int range_start_type = 0;
|
|
|
2231 int range_start_pos = 0;
|
|
|
2232 int stage;
|
|
|
2233
|
|
|
2234 range_flag = flags & ME_IN_REGION_MASK;
|
|
|
2235 if ((range_flag == ME_START_IN_REGION ||
|
|
|
2236 range_flag == ME_START_AND_END_IN_REGION) &&
|
|
|
2237 !(flags & ME_NEGATE_IN_REGION))
|
|
|
2238 {
|
|
|
2239 /* map over start position in [range-start, range-end]. No SOE
|
|
|
2240 stage. */
|
|
|
2241 range_endp = 0;
|
|
|
2242 }
|
|
|
2243 else if (range_flag == ME_END_IN_REGION && !(flags & ME_NEGATE_IN_REGION))
|
|
|
2244 {
|
|
|
2245 /* map over end position in [range-start, range-end]. No SOE
|
|
|
2246 stage. */
|
|
|
2247 range_endp = 1;
|
|
|
2248 }
|
|
|
2249 else
|
|
|
2250 {
|
|
|
2251 /* Need to include the SOE extents. */
|
|
|
2252 #ifdef DONT_USE_SOE
|
|
|
2253 /* Just brute-force it: start from the beginning. */
|
|
|
2254 range_endp = 0;
|
|
|
2255 range_start_type = 2;
|
|
|
2256 range_start_pos = 0;
|
|
|
2257 #else
|
|
|
2258 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents_force (obj);
|
|
|
2259 int numsoe;
|
|
|
2260
|
|
|
2261 /* Move the SOE to the closer end of the range. This dictates
|
|
|
2262 whether we map over start positions or end positions. */
|
|
|
2263 range_endp = 0;
|
|
|
2264 soe_move (obj, st);
|
|
|
2265 numsoe = extent_list_num_els (soe->extents);
|
|
|
2266 if (numsoe)
|
|
|
2267 {
|
|
|
2268 if (flags & ME_MIGHT_MOVE_SOE)
|
|
|
2269 {
|
|
|
2270 int foundp;
|
|
|
2271 /* Can't map over SOE, so just extend range to cover the
|
|
|
2272 SOE. */
|
|
|
2273 EXTENT e = extent_list_at (soe->extents, 0, 0);
|
|
|
2274 range_start_pos =
|
|
|
2275 extent_list_locate (buffer_or_string_extent_list (obj), e, 0,
|
|
|
2276 &foundp);
|
|
|
2277 assert (foundp);
|
|
|
2278 range_start_type = 2;
|
|
|
2279 }
|
|
|
2280 else
|
|
|
2281 {
|
|
|
2282 /* We can map over the SOE. */
|
|
|
2283 do_soe_stage = 1;
|
|
|
2284 range_start_type = 1;
|
|
|
2285 }
|
|
|
2286 }
|
|
|
2287 else
|
|
|
2288 {
|
|
|
2289 /* No extents in the SOE to map over, so we act just as if
|
|
|
2290 ME_START_IN_REGION or ME_END_IN_REGION was specified.
|
|
|
2291 RANGE_ENDP already specified so no need to do anything else. */
|
|
|
2292 }
|
|
|
2293 }
|
|
|
2294 #endif
|
|
|
2295
|
|
|
2296 /* ---------- Now loop over the extents. ---------- */
|
|
|
2297
|
|
|
2298 /* We combine the code for the two stages because much of it
|
|
|
2299 overlaps. */
|
|
|
2300 for (stage = 0; stage < 2; stage++)
|
|
|
2301 {
|
|
|
2302 int pos = 0; /* Position in extent list */
|
|
|
2303
|
|
|
2304 /* First set up start conditions */
|
|
|
2305 if (stage == 0)
|
|
|
2306 { /* The SOE stage */
|
|
|
2307 if (!do_soe_stage)
|
|
|
2308 continue;
|
|
|
2309 el = buffer_or_string_stack_of_extents_force (obj)->extents;
|
|
|
2310 /* We will always be looping over start extents here. */
|
|
|
2311 assert (!range_endp);
|
|
|
2312 pos = 0;
|
|
|
2313 }
|
|
|
2314 else
|
|
|
2315 { /* The range stage */
|
|
|
2316 el = buffer_or_string_extent_list (obj);
|
|
|
2317 switch (range_start_type)
|
|
|
2318 {
|
|
|
2319 case 0:
|
|
|
2320 pos = extent_list_locate_from_pos (el, st, range_endp);
|
|
|
2321 break;
|
|
|
2322 case 1:
|
|
|
2323 pos = extent_list_locate_from_pos (el, st + 1, range_endp);
|
|
|
2324 break;
|
|
|
2325 case 2:
|
|
|
2326 pos = range_start_pos;
|
|
|
2327 break;
|
|
|
2328 }
|
|
|
2329 }
|
|
|
2330
|
|
|
2331 if (flags & ME_MIGHT_MODIFY_EXTENTS)
|
|
|
2332 {
|
|
|
2333 /* Create a marker to track changes to the extent list */
|
|
|
2334 if (posm)
|
|
|
2335 /* Delete the marker used in the SOE stage. */
|
|
|
2336 extent_list_delete_marker
|
|
|
2337 (buffer_or_string_stack_of_extents_force (obj)->extents, posm);
|
|
|
2338 posm = extent_list_make_marker (el, pos, range_endp);
|
|
|
2339 /* tell the unwind function about the marker. */
|
|
|
2340 closure.el = el;
|
|
|
2341 closure.mkr = posm;
|
|
|
2342 }
|
|
|
2343
|
|
|
2344 /* Now loop! */
|
|
|
2345 for (;;)
|
|
|
2346 {
|
|
|
2347 EXTENT e;
|
|
|
2348 Lisp_Object obj2;
|
|
|
2349
|
|
|
2350 /* ----- update position in extent list
|
|
|
2351 and fetch next extent ----- */
|
|
|
2352
|
|
|
2353 if (posm)
|
|
|
2354 /* fetch POS again to track extent insertions or deletions */
|
|
|
2355 pos = extent_list_marker_pos (el, posm);
|
|
|
2356 if (pos >= extent_list_num_els (el))
|
|
|
2357 break;
|
|
|
2358 e = extent_list_at (el, pos, range_endp);
|
|
|
2359 pos++;
|
|
|
2360 if (posm)
|
|
|
2361 /* now point the marker to the next one we're going to process.
|
|
|
2362 This ensures graceful behavior if this extent is deleted. */
|
|
|
2363 extent_list_move_marker (el, posm, pos);
|
|
|
2364
|
|
|
2365 /* ----- deal with internal extents ----- */
|
|
|
2366
|
|
|
2367 if (extent_internal_p (e))
|
|
|
2368 {
|
|
|
2369 if (!(flags & ME_INCLUDE_INTERNAL))
|
|
|
2370 continue;
|
|
|
2371 else if (e == range)
|
|
|
2372 {
|
|
|
2373 /* We're processing internal extents and we've
|
|
|
2374 come across our own special range extent.
|
|
|
2375 (This happens only in adjust_extents*() and
|
|
|
2376 process_extents*(), which handle text
|
|
|
2377 insertion and deletion.) We need to omit
|
|
|
2378 processing of this extent; otherwise
|
|
|
2379 we will probably end up prematurely
|
|
|
2380 terminating this loop. */
|
|
|
2381 continue;
|
|
|
2382 }
|
|
|
2383 }
|
|
|
2384
|
|
|
2385 /* ----- deal with AFTER condition ----- */
|
|
|
2386
|
|
|
2387 if (after)
|
|
|
2388 {
|
|
|
2389 /* if e > after, then we can stop skipping extents. */
|
|
|
2390 if (EXTENT_LESS (after, e))
|
|
|
2391 after = 0;
|
|
|
2392 else /* otherwise, skip this extent. */
|
|
|
2393 continue;
|
|
|
2394 }
|
|
|
2395
|
|
|
2396 /* ----- stop if we're completely outside the range ----- */
|
|
|
2397
|
|
|
2398 /* fetch ST and EN again to track text insertions or deletions */
|
|
|
2399 if (range)
|
|
|
2400 {
|
|
|
2401 st = extent_start (range);
|
|
|
2402 en = extent_end (range);
|
|
|
2403 }
|
|
|
2404 if (extent_endpoint (e, range_endp) > en)
|
|
|
2405 {
|
|
|
2406 /* Can't be mapping over SOE because all extents in
|
|
|
2407 there should overlap ST */
|
|
|
2408 assert (stage == 1);
|
|
|
2409 break;
|
|
|
2410 }
|
|
|
2411
|
|
|
2412 /* ----- Now actually call the function ----- */
|
|
|
2413
|
|
|
2414 obj2 = extent_object (e);
|
|
|
2415 if (extent_in_region_p (e,
|
|
826
|
2416 buffer_or_string_memxpos_to_bytexpos (obj2,
|
|
|
2417 st),
|
|
|
2418 buffer_or_string_memxpos_to_bytexpos (obj2,
|
|
|
2419 en),
|
|
428
|
2420 flags))
|
|
|
2421 {
|
|
|
2422 if ((*fn)(e, arg))
|
|
|
2423 {
|
|
|
2424 /* Function wants us to stop mapping. */
|
|
|
2425 stage = 1; /* so outer for loop will terminate */
|
|
|
2426 break;
|
|
|
2427 }
|
|
|
2428 }
|
|
|
2429 }
|
|
|
2430 }
|
|
|
2431 /* ---------- Finished looping. ---------- */
|
|
|
2432 }
|
|
|
2433
|
|
|
2434 if (flags & ME_MIGHT_THROW)
|
|
|
2435 /* This deletes the range extent and frees the marker. */
|
|
771
|
2436 unbind_to (count);
|
|
428
|
2437 else
|
|
|
2438 {
|
|
|
2439 /* Delete them ourselves */
|
|
|
2440 if (range)
|
|
|
2441 extent_detach (range);
|
|
|
2442 if (posm)
|
|
|
2443 extent_list_delete_marker (el, posm);
|
|
|
2444 }
|
|
|
2445 }
|
|
|
2446
|
|
|
2447 /* ------------------------------- */
|
|
|
2448 /* adjust_extents() */
|
|
|
2449 /* ------------------------------- */
|
|
|
2450
|
|
|
2451 /* Add AMOUNT to all extent endpoints in the range (FROM, TO]. This
|
|
|
2452 happens whenever the gap is moved or (under Mule) a character in a
|
|
|
2453 string is substituted for a different-length one. The reason for
|
|
|
2454 this is that extent endpoints behave just like markers (all memory
|
|
|
2455 indices do) and this adjustment correct for markers -- see
|
|
|
2456 adjust_markers(). Note that it is important that we visit all
|
|
|
2457 extent endpoints in the range, irrespective of whether the
|
|
|
2458 endpoints are open or closed.
|
|
|
2459
|
|
|
2460 We could use map_extents() for this (and in fact the function
|
|
|
2461 was originally written that way), but the gap is in an incoherent
|
|
|
2462 state when this function is called and this function plays
|
|
|
2463 around with extent endpoints without detaching and reattaching
|
|
|
2464 the extents (this is provably correct and saves lots of time),
|
|
|
2465 so for safety we make it just look at the extent lists directly. */
|
|
|
2466
|
|
|
2467 void
|
|
826
|
2468 adjust_extents (Lisp_Object obj, Memxpos from, Memxpos to, int amount)
|
|
428
|
2469 {
|
|
|
2470 int endp;
|
|
|
2471 int pos;
|
|
|
2472 int startpos[2];
|
|
|
2473 Extent_List *el;
|
|
|
2474 Stack_Of_Extents *soe;
|
|
|
2475
|
|
|
2476 #ifdef ERROR_CHECK_EXTENTS
|
|
|
2477 sledgehammer_extent_check (obj);
|
|
|
2478 #endif
|
|
|
2479 el = buffer_or_string_extent_list (obj);
|
|
|
2480
|
|
|
2481 if (!el || !extent_list_num_els(el))
|
|
|
2482 return;
|
|
|
2483
|
|
|
2484 /* IMPORTANT! Compute the starting positions of the extents to
|
|
|
2485 modify BEFORE doing any modification! Otherwise the starting
|
|
|
2486 position for the second time through the loop might get
|
|
|
2487 incorrectly calculated (I got bit by this bug real bad). */
|
|
|
2488 startpos[0] = extent_list_locate_from_pos (el, from+1, 0);
|
|
|
2489 startpos[1] = extent_list_locate_from_pos (el, from+1, 1);
|
|
|
2490 for (endp = 0; endp < 2; endp++)
|
|
|
2491 {
|
|
|
2492 for (pos = startpos[endp]; pos < extent_list_num_els (el);
|
|
|
2493 pos++)
|
|
|
2494 {
|
|
|
2495 EXTENT e = extent_list_at (el, pos, endp);
|
|
|
2496 if (extent_endpoint (e, endp) > to)
|
|
|
2497 break;
|
|
|
2498 set_extent_endpoint (e,
|
|
|
2499 do_marker_adjustment (extent_endpoint (e, endp),
|
|
|
2500 from, to, amount),
|
|
|
2501 endp);
|
|
|
2502 }
|
|
|
2503 }
|
|
|
2504
|
|
|
2505 /* The index for the buffer's SOE is a memory index and thus
|
|
|
2506 needs to be adjusted like a marker. */
|
|
|
2507 soe = buffer_or_string_stack_of_extents (obj);
|
|
|
2508 if (soe && soe->pos >= 0)
|
|
|
2509 soe->pos = do_marker_adjustment (soe->pos, from, to, amount);
|
|
|
2510 }
|
|
|
2511
|
|
|
2512 /* ------------------------------- */
|
|
|
2513 /* adjust_extents_for_deletion() */
|
|
|
2514 /* ------------------------------- */
|
|
|
2515
|
|
|
2516 struct adjust_extents_for_deletion_arg
|
|
|
2517 {
|
|
|
2518 EXTENT_dynarr *list;
|
|
|
2519 };
|
|
|
2520
|
|
|
2521 static int
|
|
|
2522 adjust_extents_for_deletion_mapper (EXTENT extent, void *arg)
|
|
|
2523 {
|
|
|
2524 struct adjust_extents_for_deletion_arg *closure =
|
|
|
2525 (struct adjust_extents_for_deletion_arg *) arg;
|
|
|
2526
|
|
|
2527 Dynarr_add (closure->list, extent);
|
|
|
2528 return 0; /* continue mapping */
|
|
|
2529 }
|
|
|
2530
|
|
|
2531 /* For all extent endpoints in the range (FROM, TO], move them to the beginning
|
|
|
2532 of the new gap. Note that it is important that we visit all extent
|
|
|
2533 endpoints in the range, irrespective of whether the endpoints are open or
|
|
|
2534 closed.
|
|
|
2535
|
|
|
2536 This function deals with weird stuff such as the fact that extents
|
|
|
2537 may get reordered.
|
|
|
2538
|
|
|
2539 There is no string correspondent for this because you can't
|
|
|
2540 delete characters from a string.
|
|
|
2541 */
|
|
|
2542
|
|
|
2543 void
|
|
826
|
2544 adjust_extents_for_deletion (Lisp_Object object, Bytexpos from,
|
|
|
2545 Bytexpos to, int gapsize, int numdel,
|
|
428
|
2546 int movegapsize)
|
|
|
2547 {
|
|
|
2548 struct adjust_extents_for_deletion_arg closure;
|
|
|
2549 int i;
|
|
826
|
2550 Memxpos adjust_to = (Memxpos) (to + gapsize);
|
|
428
|
2551 Bytecount amount = - numdel - movegapsize;
|
|
826
|
2552 Memxpos oldsoe = 0, newsoe = 0;
|
|
428
|
2553 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (object);
|
|
|
2554
|
|
|
2555 #ifdef ERROR_CHECK_EXTENTS
|
|
|
2556 sledgehammer_extent_check (object);
|
|
|
2557 #endif
|
|
|
2558 closure.list = Dynarr_new (EXTENT);
|
|
|
2559
|
|
|
2560 /* We're going to be playing weird games below with extents and the SOE
|
|
|
2561 and such, so compute the list now of all the extents that we're going
|
|
|
2562 to muck with. If we do the mapping and adjusting together, things can
|
|
|
2563 get all screwed up. */
|
|
|
2564
|
|
826
|
2565 map_extents (from, to, adjust_extents_for_deletion_mapper,
|
|
|
2566 (void *) &closure, object, 0,
|
|
|
2567 /* extent endpoints move like markers regardless
|
|
|
2568 of their open/closeness. */
|
|
|
2569 ME_ALL_EXTENTS_CLOSED | ME_END_CLOSED |
|
|
|
2570 ME_START_OR_END_IN_REGION | ME_INCLUDE_INTERNAL);
|
|
428
|
2571
|
|
|
2572 /*
|
|
|
2573 Old and new values for the SOE's position. (It gets adjusted
|
|
|
2574 like a marker, just like extent endpoints.)
|
|
|
2575 */
|
|
|
2576
|
|
|
2577 if (soe)
|
|
|
2578 {
|
|
|
2579 oldsoe = soe->pos;
|
|
|
2580 if (soe->pos >= 0)
|
|
|
2581 newsoe = do_marker_adjustment (soe->pos,
|
|
|
2582 adjust_to, adjust_to,
|
|
|
2583 amount);
|
|
|
2584 else
|
|
|
2585 newsoe = soe->pos;
|
|
|
2586 }
|
|
|
2587
|
|
|
2588 for (i = 0; i < Dynarr_length (closure.list); i++)
|
|
|
2589 {
|
|
|
2590 EXTENT extent = Dynarr_at (closure.list, i);
|
|
826
|
2591 Memxpos new_start = extent_start (extent);
|
|
|
2592 Memxpos new_end = extent_end (extent);
|
|
428
|
2593
|
|
|
2594 /* do_marker_adjustment() will not adjust values that should not be
|
|
|
2595 adjusted. We're passing the same funky arguments to
|
|
|
2596 do_marker_adjustment() as buffer_delete_range() does. */
|
|
|
2597 new_start =
|
|
|
2598 do_marker_adjustment (new_start,
|
|
|
2599 adjust_to, adjust_to,
|
|
|
2600 amount);
|
|
|
2601 new_end =
|
|
|
2602 do_marker_adjustment (new_end,
|
|
|
2603 adjust_to, adjust_to,
|
|
|
2604 amount);
|
|
|
2605
|
|
|
2606 /* We need to be very careful here so that the SOE doesn't get
|
|
|
2607 corrupted. We are shrinking extents out of the deleted region
|
|
|
2608 and simultaneously moving the SOE's pos out of the deleted
|
|
|
2609 region, so the SOE should contain the same extents at the end
|
|
|
2610 as at the beginning. However, extents may get reordered
|
|
|
2611 by this process, so we have to operate by pulling the extents
|
|
|
2612 out of the buffer and SOE, changing their bounds, and then
|
|
|
2613 reinserting them. In order for the SOE not to get screwed up,
|
|
|
2614 we have to make sure that the SOE's pos points to its old
|
|
|
2615 location whenever we pull an extent out, and points to its
|
|
|
2616 new location whenever we put the extent back in.
|
|
|
2617 */
|
|
|
2618
|
|
|
2619 if (new_start != extent_start (extent) ||
|
|
|
2620 new_end != extent_end (extent))
|
|
|
2621 {
|
|
|
2622 extent_detach (extent);
|
|
|
2623 set_extent_start (extent, new_start);
|
|
|
2624 set_extent_end (extent, new_end);
|
|
|
2625 if (soe)
|
|
|
2626 soe->pos = newsoe;
|
|
|
2627 extent_attach (extent);
|
|
|
2628 if (soe)
|
|
|
2629 soe->pos = oldsoe;
|
|
|
2630 }
|
|
|
2631 }
|
|
|
2632
|
|
|
2633 if (soe)
|
|
|
2634 soe->pos = newsoe;
|
|
|
2635
|
|
|
2636 #ifdef ERROR_CHECK_EXTENTS
|
|
|
2637 sledgehammer_extent_check (object);
|
|
|
2638 #endif
|
|
|
2639 Dynarr_free (closure.list);
|
|
|
2640 }
|
|
|
2641
|
|
|
2642 /* ------------------------------- */
|
|
|
2643 /* extent fragments */
|
|
|
2644 /* ------------------------------- */
|
|
|
2645
|
|
|
2646 /* Imagine that the buffer is divided up into contiguous,
|
|
|
2647 nonoverlapping "runs" of text such that no extent
|
|
|
2648 starts or ends within a run (extents that abut the
|
|
|
2649 run don't count).
|
|
|
2650
|
|
|
2651 An extent fragment is a structure that holds data about
|
|
|
2652 the run that contains a particular buffer position (if
|
|
|
2653 the buffer position is at the junction of two runs, the
|
|
|
2654 run after the position is used) -- the beginning and
|
|
|
2655 end of the run, a list of all of the extents in that
|
|
|
2656 run, the "merged face" that results from merging all of
|
|
|
2657 the faces corresponding to those extents, the begin and
|
|
|
2658 end glyphs at the beginning of the run, etc. This is
|
|
|
2659 the information that redisplay needs in order to
|
|
|
2660 display this run.
|
|
|
2661
|
|
|
2662 Extent fragments have to be very quick to update to
|
|
|
2663 a new buffer position when moving linearly through
|
|
|
2664 the buffer. They rely on the stack-of-extents code,
|
|
|
2665 which does the heavy-duty algorithmic work of determining
|
|
|
2666 which extents overly a particular position. */
|
|
|
2667
|
|
|
2668 /* This function returns the position of the beginning of
|
|
|
2669 the first run that begins after POS, or returns POS if
|
|
|
2670 there are no such runs. */
|
|
|
2671
|
|
826
|
2672 static Bytexpos
|
|
|
2673 extent_find_end_of_run (Lisp_Object obj, Bytexpos pos, int outside_accessible)
|
|
428
|
2674 {
|
|
|
2675 Extent_List *sel;
|
|
|
2676 Extent_List *bel = buffer_or_string_extent_list (obj);
|
|
826
|
2677 Bytexpos pos1, pos2;
|
|
428
|
2678 int elind1, elind2;
|
|
826
|
2679 Memxpos mempos = buffer_or_string_bytexpos_to_memxpos (obj, pos);
|
|
|
2680 Bytexpos limit = outside_accessible ?
|
|
428
|
2681 buffer_or_string_absolute_end_byte (obj) :
|
|
826
|
2682 buffer_or_string_accessible_end_byte (obj);
|
|
|
2683
|
|
|
2684 if (!bel || !extent_list_num_els (bel))
|
|
428
|
2685 return limit;
|
|
|
2686
|
|
|
2687 sel = buffer_or_string_stack_of_extents_force (obj)->extents;
|
|
|
2688 soe_move (obj, mempos);
|
|
|
2689
|
|
|
2690 /* Find the first start position after POS. */
|
|
|
2691 elind1 = extent_list_locate_from_pos (bel, mempos+1, 0);
|
|
|
2692 if (elind1 < extent_list_num_els (bel))
|
|
826
|
2693 pos1 = buffer_or_string_memxpos_to_bytexpos
|
|
428
|
2694 (obj, extent_start (extent_list_at (bel, elind1, 0)));
|
|
|
2695 else
|
|
|
2696 pos1 = limit;
|
|
|
2697
|
|
|
2698 /* Find the first end position after POS. The extent corresponding
|
|
|
2699 to this position is either in the SOE or is greater than or
|
|
|
2700 equal to POS1, so we just have to look in the SOE. */
|
|
|
2701 elind2 = extent_list_locate_from_pos (sel, mempos+1, 1);
|
|
|
2702 if (elind2 < extent_list_num_els (sel))
|
|
826
|
2703 pos2 = buffer_or_string_memxpos_to_bytexpos
|
|
428
|
2704 (obj, extent_end (extent_list_at (sel, elind2, 1)));
|
|
|
2705 else
|
|
|
2706 pos2 = limit;
|
|
|
2707
|
|
|
2708 return min (min (pos1, pos2), limit);
|
|
|
2709 }
|
|
|
2710
|
|
826
|
2711 static Bytexpos
|
|
|
2712 extent_find_beginning_of_run (Lisp_Object obj, Bytexpos pos,
|
|
428
|
2713 int outside_accessible)
|
|
|
2714 {
|
|
|
2715 Extent_List *sel;
|
|
|
2716 Extent_List *bel = buffer_or_string_extent_list (obj);
|
|
826
|
2717 Bytexpos pos1, pos2;
|
|
428
|
2718 int elind1, elind2;
|
|
826
|
2719 Memxpos mempos = buffer_or_string_bytexpos_to_memxpos (obj, pos);
|
|
|
2720 Bytexpos limit = outside_accessible ?
|
|
428
|
2721 buffer_or_string_absolute_begin_byte (obj) :
|
|
826
|
2722 buffer_or_string_accessible_begin_byte (obj);
|
|
428
|
2723
|
|
|
2724 if (!bel || !extent_list_num_els(bel))
|
|
|
2725 return limit;
|
|
|
2726
|
|
|
2727 sel = buffer_or_string_stack_of_extents_force (obj)->extents;
|
|
|
2728 soe_move (obj, mempos);
|
|
|
2729
|
|
|
2730 /* Find the first end position before POS. */
|
|
|
2731 elind1 = extent_list_locate_from_pos (bel, mempos, 1);
|
|
|
2732 if (elind1 > 0)
|
|
826
|
2733 pos1 = buffer_or_string_memxpos_to_bytexpos
|
|
428
|
2734 (obj, extent_end (extent_list_at (bel, elind1 - 1, 1)));
|
|
|
2735 else
|
|
|
2736 pos1 = limit;
|
|
|
2737
|
|
|
2738 /* Find the first start position before POS. The extent corresponding
|
|
|
2739 to this position is either in the SOE or is less than or
|
|
|
2740 equal to POS1, so we just have to look in the SOE. */
|
|
|
2741 elind2 = extent_list_locate_from_pos (sel, mempos, 0);
|
|
|
2742 if (elind2 > 0)
|
|
826
|
2743 pos2 = buffer_or_string_memxpos_to_bytexpos
|
|
428
|
2744 (obj, extent_start (extent_list_at (sel, elind2 - 1, 0)));
|
|
|
2745 else
|
|
|
2746 pos2 = limit;
|
|
|
2747
|
|
|
2748 return max (max (pos1, pos2), limit);
|
|
|
2749 }
|
|
|
2750
|
|
|
2751 struct extent_fragment *
|
|
|
2752 extent_fragment_new (Lisp_Object buffer_or_string, struct frame *frm)
|
|
|
2753 {
|
|
|
2754 struct extent_fragment *ef = xnew_and_zero (struct extent_fragment);
|
|
|
2755
|
|
|
2756 ef->object = buffer_or_string;
|
|
|
2757 ef->frm = frm;
|
|
|
2758 ef->extents = Dynarr_new (EXTENT);
|
|
|
2759 ef->begin_glyphs = Dynarr_new (glyph_block);
|
|
|
2760 ef->end_glyphs = Dynarr_new (glyph_block);
|
|
|
2761
|
|
|
2762 return ef;
|
|
|
2763 }
|
|
|
2764
|
|
|
2765 void
|
|
|
2766 extent_fragment_delete (struct extent_fragment *ef)
|
|
|
2767 {
|
|
|
2768 Dynarr_free (ef->extents);
|
|
|
2769 Dynarr_free (ef->begin_glyphs);
|
|
|
2770 Dynarr_free (ef->end_glyphs);
|
|
|
2771 xfree (ef);
|
|
|
2772 }
|
|
|
2773
|
|
|
2774 static int
|
|
|
2775 extent_priority_sort_function (const void *humpty, const void *dumpty)
|
|
|
2776 {
|
|
442
|
2777 const EXTENT foo = * (const EXTENT *) humpty;
|
|
|
2778 const EXTENT bar = * (const EXTENT *) dumpty;
|
|
428
|
2779 if (extent_priority (foo) < extent_priority (bar))
|
|
|
2780 return -1;
|
|
|
2781 return extent_priority (foo) > extent_priority (bar);
|
|
|
2782 }
|
|
|
2783
|
|
|
2784 static void
|
|
|
2785 extent_fragment_sort_by_priority (EXTENT_dynarr *extarr)
|
|
|
2786 {
|
|
|
2787 int i;
|
|
|
2788
|
|
|
2789 /* Sort our copy of the stack by extent_priority. We use a bubble
|
|
|
2790 sort here because it's going to be faster than qsort() for small
|
|
|
2791 numbers of extents (less than 10 or so), and 99.999% of the time
|
|
|
2792 there won't ever be more extents than this in the stack. */
|
|
|
2793 if (Dynarr_length (extarr) < 10)
|
|
|
2794 {
|
|
|
2795 for (i = 1; i < Dynarr_length (extarr); i++)
|
|
|
2796 {
|
|
|
2797 int j = i - 1;
|
|
|
2798 while (j >= 0 &&
|
|
|
2799 (extent_priority (Dynarr_at (extarr, j)) >
|
|
|
2800 extent_priority (Dynarr_at (extarr, j+1))))
|
|
|
2801 {
|
|
|
2802 EXTENT tmp = Dynarr_at (extarr, j);
|
|
|
2803 Dynarr_at (extarr, j) = Dynarr_at (extarr, j+1);
|
|
|
2804 Dynarr_at (extarr, j+1) = tmp;
|
|
|
2805 j--;
|
|
|
2806 }
|
|
|
2807 }
|
|
|
2808 }
|
|
|
2809 else
|
|
|
2810 /* But some loser programs mess up and may create a large number
|
|
|
2811 of extents overlapping the same spot. This will result in
|
|
|
2812 catastrophic behavior if we use the bubble sort above. */
|
|
|
2813 qsort (Dynarr_atp (extarr, 0), Dynarr_length (extarr),
|
|
|
2814 sizeof (EXTENT), extent_priority_sort_function);
|
|
|
2815 }
|
|
|
2816
|
|
|
2817 /* If PROP is the `invisible' property of an extent,
|
|
|
2818 this is 1 if the extent should be treated as invisible. */
|
|
|
2819
|
|
|
2820 #define EXTENT_PROP_MEANS_INVISIBLE(buf, prop) \
|
|
|
2821 (EQ (buf->invisibility_spec, Qt) \
|
|
|
2822 ? ! NILP (prop) \
|
|
|
2823 : invisible_p (prop, buf->invisibility_spec))
|
|
|
2824
|
|
|
2825 /* If PROP is the `invisible' property of a extent,
|
|
|
2826 this is 1 if the extent should be treated as invisible
|
|
|
2827 and should have an ellipsis. */
|
|
|
2828
|
|
|
2829 #define EXTENT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS(buf, prop) \
|
|
|
2830 (EQ (buf->invisibility_spec, Qt) \
|
|
|
2831 ? 0 \
|
|
|
2832 : invisible_ellipsis_p (prop, buf->invisibility_spec))
|
|
|
2833
|
|
|
2834 /* This is like a combination of memq and assq.
|
|
|
2835 Return 1 if PROPVAL appears as an element of LIST
|
|
|
2836 or as the car of an element of LIST.
|
|
|
2837 If PROPVAL is a list, compare each element against LIST
|
|
|
2838 in that way, and return 1 if any element of PROPVAL is found in LIST.
|
|
|
2839 Otherwise return 0.
|
|
|
2840 This function cannot quit. */
|
|
|
2841
|
|
|
2842 static int
|
|
|
2843 invisible_p (REGISTER Lisp_Object propval, Lisp_Object list)
|
|
|
2844 {
|
|
|
2845 REGISTER Lisp_Object tail, proptail;
|
|
|
2846 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
2847 {
|
|
|
2848 REGISTER Lisp_Object tem;
|
|
|
2849 tem = XCAR (tail);
|
|
|
2850 if (EQ (propval, tem))
|
|
|
2851 return 1;
|
|
|
2852 if (CONSP (tem) && EQ (propval, XCAR (tem)))
|
|
|
2853 return 1;
|
|
|
2854 }
|
|
|
2855 if (CONSP (propval))
|
|
|
2856 for (proptail = propval; CONSP (proptail);
|
|
|
2857 proptail = XCDR (proptail))
|
|
|
2858 {
|
|
|
2859 Lisp_Object propelt;
|
|
|
2860 propelt = XCAR (proptail);
|
|
|
2861 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
2862 {
|
|
|
2863 REGISTER Lisp_Object tem;
|
|
|
2864 tem = XCAR (tail);
|
|
|
2865 if (EQ (propelt, tem))
|
|
|
2866 return 1;
|
|
|
2867 if (CONSP (tem) && EQ (propelt, XCAR (tem)))
|
|
|
2868 return 1;
|
|
|
2869 }
|
|
|
2870 }
|
|
|
2871 return 0;
|
|
|
2872 }
|
|
|
2873
|
|
|
2874 /* Return 1 if PROPVAL appears as the car of an element of LIST
|
|
|
2875 and the cdr of that element is non-nil.
|
|
|
2876 If PROPVAL is a list, check each element of PROPVAL in that way,
|
|
|
2877 and the first time some element is found,
|
|
|
2878 return 1 if the cdr of that element is non-nil.
|
|
|
2879 Otherwise return 0.
|
|
|
2880 This function cannot quit. */
|
|
|
2881
|
|
|
2882 static int
|
|
|
2883 invisible_ellipsis_p (REGISTER Lisp_Object propval, Lisp_Object list)
|
|
|
2884 {
|
|
|
2885 REGISTER Lisp_Object tail, proptail;
|
|
|
2886 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
2887 {
|
|
|
2888 REGISTER Lisp_Object tem;
|
|
|
2889 tem = XCAR (tail);
|
|
|
2890 if (CONSP (tem) && EQ (propval, XCAR (tem)))
|
|
|
2891 return ! NILP (XCDR (tem));
|
|
|
2892 }
|
|
|
2893 if (CONSP (propval))
|
|
|
2894 for (proptail = propval; CONSP (proptail);
|
|
|
2895 proptail = XCDR (proptail))
|
|
|
2896 {
|
|
|
2897 Lisp_Object propelt;
|
|
|
2898 propelt = XCAR (proptail);
|
|
|
2899 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
2900 {
|
|
|
2901 REGISTER Lisp_Object tem;
|
|
|
2902 tem = XCAR (tail);
|
|
|
2903 if (CONSP (tem) && EQ (propelt, XCAR (tem)))
|
|
|
2904 return ! NILP (XCDR (tem));
|
|
|
2905 }
|
|
|
2906 }
|
|
|
2907 return 0;
|
|
|
2908 }
|
|
|
2909
|
|
|
2910 face_index
|
|
|
2911 extent_fragment_update (struct window *w, struct extent_fragment *ef,
|
|
826
|
2912 Bytexpos pos, Lisp_Object last_glyph)
|
|
428
|
2913 {
|
|
|
2914 int i;
|
|
819
|
2915 int seen_glyph = NILP (last_glyph) ? 1 : 0;
|
|
428
|
2916 Extent_List *sel =
|
|
|
2917 buffer_or_string_stack_of_extents_force (ef->object)->extents;
|
|
|
2918 EXTENT lhe = 0;
|
|
|
2919 struct extent dummy_lhe_extent;
|
|
826
|
2920 Memxpos mempos = buffer_or_string_bytexpos_to_memxpos (ef->object, pos);
|
|
428
|
2921
|
|
|
2922 #ifdef ERROR_CHECK_EXTENTS
|
|
|
2923 assert (pos >= buffer_or_string_accessible_begin_byte (ef->object)
|
|
|
2924 && pos <= buffer_or_string_accessible_end_byte (ef->object));
|
|
|
2925 #endif
|
|
|
2926
|
|
|
2927 Dynarr_reset (ef->extents);
|
|
|
2928 Dynarr_reset (ef->begin_glyphs);
|
|
|
2929 Dynarr_reset (ef->end_glyphs);
|
|
|
2930
|
|
|
2931 ef->previously_invisible = ef->invisible;
|
|
|
2932 if (ef->invisible)
|
|
|
2933 {
|
|
|
2934 if (ef->invisible_ellipses)
|
|
|
2935 ef->invisible_ellipses_already_displayed = 1;
|
|
|
2936 }
|
|
|
2937 else
|
|
|
2938 ef->invisible_ellipses_already_displayed = 0;
|
|
|
2939 ef->invisible = 0;
|
|
|
2940 ef->invisible_ellipses = 0;
|
|
|
2941
|
|
|
2942 /* Set up the begin and end positions. */
|
|
|
2943 ef->pos = pos;
|
|
|
2944 ef->end = extent_find_end_of_run (ef->object, pos, 0);
|
|
|
2945
|
|
|
2946 /* Note that extent_find_end_of_run() already moved the SOE for us. */
|
|
|
2947 /* soe_move (ef->object, mempos); */
|
|
|
2948
|
|
|
2949 /* Determine the begin glyphs at POS. */
|
|
|
2950 for (i = 0; i < extent_list_num_els (sel); i++)
|
|
|
2951 {
|
|
|
2952 EXTENT e = extent_list_at (sel, i, 0);
|
|
|
2953 if (extent_start (e) == mempos && !NILP (extent_begin_glyph (e)))
|
|
|
2954 {
|
|
|
2955 Lisp_Object glyph = extent_begin_glyph (e);
|
|
819
|
2956 if (seen_glyph) {
|
|
|
2957 struct glyph_block gb;
|
|
|
2958
|
|
|
2959 gb.glyph = glyph;
|
|
|
2960 gb.extent = wrap_extent (e);
|
|
|
2961 Dynarr_add (ef->begin_glyphs, gb);
|
|
|
2962 }
|
|
|
2963 else if (EQ (glyph, last_glyph))
|
|
|
2964 seen_glyph = 1;
|
|
428
|
2965 }
|
|
|
2966 }
|
|
|
2967
|
|
|
2968 /* Determine the end glyphs at POS. */
|
|
|
2969 for (i = 0; i < extent_list_num_els (sel); i++)
|
|
|
2970 {
|
|
|
2971 EXTENT e = extent_list_at (sel, i, 1);
|
|
|
2972 if (extent_end (e) == mempos && !NILP (extent_end_glyph (e)))
|
|
|
2973 {
|
|
|
2974 Lisp_Object glyph = extent_end_glyph (e);
|
|
819
|
2975 if (seen_glyph) {
|
|
|
2976 struct glyph_block gb;
|
|
|
2977
|
|
|
2978 gb.glyph = glyph;
|
|
|
2979 gb.extent = wrap_extent (e);
|
|
|
2980 Dynarr_add (ef->end_glyphs, gb);
|
|
|
2981 }
|
|
|
2982 else if (EQ (glyph, last_glyph))
|
|
|
2983 seen_glyph = 1;
|
|
428
|
2984 }
|
|
|
2985 }
|
|
|
2986
|
|
|
2987 /* We tried determining all the charsets used in the run here,
|
|
|
2988 but that fails even if we only do the current line -- display
|
|
|
2989 tables or non-printable characters might cause other charsets
|
|
|
2990 to be used. */
|
|
|
2991
|
|
|
2992 /* Determine whether the last-highlighted-extent is present. */
|
|
|
2993 if (EXTENTP (Vlast_highlighted_extent))
|
|
|
2994 lhe = XEXTENT (Vlast_highlighted_extent);
|
|
|
2995
|
|
|
2996 /* Now add all extents that overlap the character after POS and
|
|
|
2997 have a non-nil face. Also check if the character is invisible. */
|
|
|
2998 for (i = 0; i < extent_list_num_els (sel); i++)
|
|
|
2999 {
|
|
|
3000 EXTENT e = extent_list_at (sel, i, 0);
|
|
|
3001 if (extent_end (e) > mempos)
|
|
|
3002 {
|
|
|
3003 Lisp_Object invis_prop = extent_invisible (e);
|
|
|
3004
|
|
|
3005 if (!NILP (invis_prop))
|
|
|
3006 {
|
|
|
3007 if (!BUFFERP (ef->object))
|
|
|
3008 /* #### no `string-invisibility-spec' */
|
|
|
3009 ef->invisible = 1;
|
|
|
3010 else
|
|
|
3011 {
|
|
|
3012 if (!ef->invisible_ellipses_already_displayed &&
|
|
|
3013 EXTENT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS
|
|
|
3014 (XBUFFER (ef->object), invis_prop))
|
|
|
3015 {
|
|
|
3016 ef->invisible = 1;
|
|
|
3017 ef->invisible_ellipses = 1;
|
|
|
3018 }
|
|
|
3019 else if (EXTENT_PROP_MEANS_INVISIBLE
|
|
|
3020 (XBUFFER (ef->object), invis_prop))
|
|
|
3021 ef->invisible = 1;
|
|
|
3022 }
|
|
|
3023 }
|
|
|
3024
|
|
|
3025 /* Remember that one of the extents in the list might be our
|
|
|
3026 dummy extent representing the highlighting that is
|
|
|
3027 attached to some other extent that is currently
|
|
|
3028 mouse-highlighted. When an extent is mouse-highlighted,
|
|
|
3029 it is as if there are two extents there, of potentially
|
|
|
3030 different priorities: the extent being highlighted, with
|
|
|
3031 whatever face and priority it has; and an ephemeral
|
|
|
3032 extent in the `mouse-face' face with
|
|
|
3033 `mouse-highlight-priority'.
|
|
|
3034 */
|
|
|
3035
|
|
|
3036 if (!NILP (extent_face (e)))
|
|
|
3037 Dynarr_add (ef->extents, e);
|
|
|
3038 if (e == lhe)
|
|
|
3039 {
|
|
|
3040 Lisp_Object f;
|
|
|
3041 /* zeroing isn't really necessary; we only deref `priority'
|
|
|
3042 and `face' */
|
|
|
3043 xzero (dummy_lhe_extent);
|
|
|
3044 set_extent_priority (&dummy_lhe_extent,
|
|
|
3045 mouse_highlight_priority);
|
|
|
3046 /* Need to break up the following expression, due to an */
|
|
|
3047 /* error in the Digital UNIX 3.2g C compiler (Digital */
|
|
|
3048 /* UNIX Compiler Driver 3.11). */
|
|
|
3049 f = extent_mouse_face (lhe);
|
|
|
3050 extent_face (&dummy_lhe_extent) = f;
|
|
|
3051 Dynarr_add (ef->extents, &dummy_lhe_extent);
|
|
|
3052 }
|
|
|
3053 /* since we are looping anyway, we might as well do this here */
|
|
|
3054 if ((!NILP(extent_initial_redisplay_function (e))) &&
|
|
|
3055 !extent_in_red_event_p(e))
|
|
|
3056 {
|
|
|
3057 Lisp_Object function = extent_initial_redisplay_function (e);
|
|
|
3058 Lisp_Object obj;
|
|
|
3059
|
|
|
3060 /* printf ("initial redisplay function called!\n "); */
|
|
|
3061
|
|
|
3062 /* print_extent_2 (e);
|
|
|
3063 printf ("\n"); */
|
|
|
3064
|
|
|
3065 /* FIXME: One should probably inhibit the displaying of
|
|
|
3066 this extent to reduce flicker */
|
|
793
|
3067 extent_in_red_event_p (e) = 1;
|
|
428
|
3068
|
|
|
3069 /* call the function */
|
|
793
|
3070 obj = wrap_extent (e);
|
|
|
3071 if (!NILP (function))
|
|
|
3072 Fenqueue_eval_event (function, obj);
|
|
428
|
3073 }
|
|
|
3074 }
|
|
|
3075 }
|
|
|
3076
|
|
|
3077 extent_fragment_sort_by_priority (ef->extents);
|
|
|
3078
|
|
|
3079 /* Now merge the faces together into a single face. The code to
|
|
|
3080 do this is in faces.c because it involves manipulating faces. */
|
|
|
3081 return get_extent_fragment_face_cache_index (w, ef);
|
|
|
3082 }
|
|
|
3083
|
|
|
3084
|
|
|
3085 /************************************************************************/
|
|
|
3086 /* extent-object methods */
|
|
|
3087 /************************************************************************/
|
|
|
3088
|
|
|
3089 /* These are the basic helper functions for handling the allocation of
|
|
|
3090 extent objects. They are similar to the functions for other
|
|
|
3091 lrecord objects. allocate_extent() is in alloc.c, not here. */
|
|
|
3092
|
|
|
3093 static Lisp_Object
|
|
|
3094 mark_extent (Lisp_Object obj)
|
|
|
3095 {
|
|
|
3096 struct extent *extent = XEXTENT (obj);
|
|
|
3097
|
|
|
3098 mark_object (extent_object (extent));
|
|
|
3099 mark_object (extent_no_chase_normal_field (extent, face));
|
|
|
3100 return extent->plist;
|
|
|
3101 }
|
|
|
3102
|
|
|
3103 static void
|
|
|
3104 print_extent_1 (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
|
|
|
3105 {
|
|
|
3106 EXTENT ext = XEXTENT (obj);
|
|
|
3107 EXTENT anc = extent_ancestor (ext);
|
|
|
3108 Lisp_Object tail;
|
|
|
3109 char buf[64], *bp = buf;
|
|
|
3110
|
|
|
3111 /* Retrieve the ancestor and use it, for faster retrieval of properties */
|
|
|
3112
|
|
|
3113 if (!NILP (extent_begin_glyph (anc))) *bp++ = '*';
|
|
|
3114 *bp++ = (extent_start_open_p (anc) ? '(': '[');
|
|
|
3115 if (extent_detached_p (ext))
|
|
|
3116 strcpy (bp, "detached");
|
|
|
3117 else
|
|
826
|
3118 sprintf (bp, "%ld, %ld",
|
|
819
|
3119 XINT (Fextent_start_position (obj)),
|
|
|
3120 XINT (Fextent_end_position (obj)));
|
|
428
|
3121 bp += strlen (bp);
|
|
|
3122 *bp++ = (extent_end_open_p (anc) ? ')': ']');
|
|
|
3123 if (!NILP (extent_end_glyph (anc))) *bp++ = '*';
|
|
|
3124 *bp++ = ' ';
|
|
|
3125
|
|
|
3126 if (!NILP (extent_read_only (anc))) *bp++ = '%';
|
|
|
3127 if (!NILP (extent_mouse_face (anc))) *bp++ = 'H';
|
|
|
3128 if (extent_unique_p (anc)) *bp++ = 'U';
|
|
|
3129 else if (extent_duplicable_p (anc)) *bp++ = 'D';
|
|
|
3130 if (!NILP (extent_invisible (anc))) *bp++ = 'I';
|
|
|
3131
|
|
|
3132 if (!NILP (extent_read_only (anc)) || !NILP (extent_mouse_face (anc)) ||
|
|
|
3133 extent_unique_p (anc) ||
|
|
|
3134 extent_duplicable_p (anc) || !NILP (extent_invisible (anc)))
|
|
|
3135 *bp++ = ' ';
|
|
|
3136 *bp = '\0';
|
|
826
|
3137 write_c_string (printcharfun, buf);
|
|
428
|
3138
|
|
|
3139 tail = extent_plist_slot (anc);
|
|
|
3140
|
|
|
3141 for (; !NILP (tail); tail = Fcdr (Fcdr (tail)))
|
|
|
3142 {
|
|
|
3143 Lisp_Object v = XCAR (XCDR (tail));
|
|
|
3144 if (NILP (v)) continue;
|
|
800
|
3145 write_fmt_string_lisp (printcharfun, "%S ", 1, XCAR (tail));
|
|
428
|
3146 }
|
|
|
3147
|
|
800
|
3148 write_fmt_string (printcharfun, "0x%lx", (long) ext);
|
|
428
|
3149 }
|
|
|
3150
|
|
|
3151 static void
|
|
|
3152 print_extent (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
|
|
|
3153 {
|
|
|
3154 if (escapeflag)
|
|
|
3155 {
|
|
442
|
3156 const char *title = "";
|
|
|
3157 const char *name = "";
|
|
|
3158 const char *posttitle = "";
|
|
428
|
3159 Lisp_Object obj2 = Qnil;
|
|
|
3160
|
|
|
3161 /* Destroyed extents have 't' in the object field, causing
|
|
|
3162 extent_object() to abort (maybe). */
|
|
|
3163 if (EXTENT_LIVE_P (XEXTENT (obj)))
|
|
|
3164 obj2 = extent_object (XEXTENT (obj));
|
|
|
3165
|
|
|
3166 if (NILP (obj2))
|
|
|
3167 title = "no buffer";
|
|
|
3168 else if (BUFFERP (obj2))
|
|
|
3169 {
|
|
|
3170 if (BUFFER_LIVE_P (XBUFFER (obj2)))
|
|
|
3171 {
|
|
|
3172 title = "buffer ";
|
|
|
3173 name = (char *) XSTRING_DATA (XBUFFER (obj2)->name);
|
|
|
3174 }
|
|
|
3175 else
|
|
|
3176 {
|
|
|
3177 title = "Killed Buffer";
|
|
|
3178 name = "";
|
|
|
3179 }
|
|
|
3180 }
|
|
|
3181 else
|
|
|
3182 {
|
|
|
3183 assert (STRINGP (obj2));
|
|
|
3184 title = "string \"";
|
|
|
3185 posttitle = "\"";
|
|
|
3186 name = (char *) XSTRING_DATA (obj2);
|
|
|
3187 }
|
|
|
3188
|
|
|
3189 if (print_readably)
|
|
|
3190 {
|
|
|
3191 if (!EXTENT_LIVE_P (XEXTENT (obj)))
|
|
563
|
3192 printing_unreadable_object ("#<destroyed extent>");
|
|
428
|
3193 else
|
|
563
|
3194 printing_unreadable_object ("#<extent 0x%lx>",
|
|
428
|
3195 (long) XEXTENT (obj));
|
|
|
3196 }
|
|
|
3197
|
|
|
3198 if (!EXTENT_LIVE_P (XEXTENT (obj)))
|
|
826
|
3199 write_c_string (printcharfun, "#<destroyed extent");
|
|
428
|
3200 else
|
|
|
3201 {
|
|
826
|
3202 write_c_string (printcharfun, "#<extent ");
|
|
428
|
3203 print_extent_1 (obj, printcharfun, escapeflag);
|
|
826
|
3204 write_c_string (printcharfun, extent_detached_p (XEXTENT (obj))
|
|
|
3205 ? " from " : " in ");
|
|
800
|
3206 write_fmt_string (printcharfun, "%s%s%s", title, name, posttitle);
|
|
428
|
3207 }
|
|
|
3208 }
|
|
|
3209 else
|
|
|
3210 {
|
|
|
3211 if (print_readably)
|
|
563
|
3212 printing_unreadable_object ("#<extent>");
|
|
826
|
3213 write_c_string (printcharfun, "#<extent");
|
|
428
|
3214 }
|
|
826
|
3215 write_c_string (printcharfun, ">");
|
|
428
|
3216 }
|
|
|
3217
|
|
|
3218 static int
|
|
|
3219 properties_equal (EXTENT e1, EXTENT e2, int depth)
|
|
|
3220 {
|
|
|
3221 /* When this function is called, all indirections have been followed.
|
|
|
3222 Thus, the indirection checks in the various macros below will not
|
|
|
3223 amount to anything, and could be removed. However, the time
|
|
|
3224 savings would probably not be significant. */
|
|
|
3225 if (!(EQ (extent_face (e1), extent_face (e2)) &&
|
|
|
3226 extent_priority (e1) == extent_priority (e2) &&
|
|
|
3227 internal_equal (extent_begin_glyph (e1), extent_begin_glyph (e2),
|
|
|
3228 depth + 1) &&
|
|
|
3229 internal_equal (extent_end_glyph (e1), extent_end_glyph (e2),
|
|
|
3230 depth + 1)))
|
|
|
3231 return 0;
|
|
|
3232
|
|
|
3233 /* compare the bit flags. */
|
|
|
3234 {
|
|
|
3235 /* The has_aux field should not be relevant. */
|
|
|
3236 int e1_has_aux = e1->flags.has_aux;
|
|
|
3237 int e2_has_aux = e2->flags.has_aux;
|
|
|
3238 int value;
|
|
|
3239
|
|
|
3240 e1->flags.has_aux = e2->flags.has_aux = 0;
|
|
|
3241 value = memcmp (&e1->flags, &e2->flags, sizeof (e1->flags));
|
|
|
3242 e1->flags.has_aux = e1_has_aux;
|
|
|
3243 e2->flags.has_aux = e2_has_aux;
|
|
|
3244 if (value)
|
|
|
3245 return 0;
|
|
|
3246 }
|
|
|
3247
|
|
|
3248 /* compare the random elements of the plists. */
|
|
|
3249 return !plists_differ (extent_no_chase_plist (e1),
|
|
|
3250 extent_no_chase_plist (e2),
|
|
|
3251 0, 0, depth + 1);
|
|
|
3252 }
|
|
|
3253
|
|
|
3254 static int
|
|
|
3255 extent_equal (Lisp_Object obj1, Lisp_Object obj2, int depth)
|
|
|
3256 {
|
|
|
3257 struct extent *e1 = XEXTENT (obj1);
|
|
|
3258 struct extent *e2 = XEXTENT (obj2);
|
|
|
3259 return
|
|
|
3260 (extent_start (e1) == extent_start (e2) &&
|
|
|
3261 extent_end (e1) == extent_end (e2) &&
|
|
|
3262 internal_equal (extent_object (e1), extent_object (e2), depth + 1) &&
|
|
|
3263 properties_equal (extent_ancestor (e1), extent_ancestor (e2),
|
|
|
3264 depth));
|
|
|
3265 }
|
|
|
3266
|
|
665
|
3267 static Hashcode
|
|
428
|
3268 extent_hash (Lisp_Object obj, int depth)
|
|
|
3269 {
|
|
|
3270 struct extent *e = XEXTENT (obj);
|
|
|
3271 /* No need to hash all of the elements; that would take too long.
|
|
|
3272 Just hash the most common ones. */
|
|
|
3273 return HASH3 (extent_start (e), extent_end (e),
|
|
|
3274 internal_hash (extent_object (e), depth + 1));
|
|
|
3275 }
|
|
|
3276
|
|
1204
|
3277 static const struct memory_description extent_description[] = {
|
|
442
|
3278 { XD_LISP_OBJECT, offsetof (struct extent, object) },
|
|
|
3279 { XD_LISP_OBJECT, offsetof (struct extent, flags.face) },
|
|
|
3280 { XD_LISP_OBJECT, offsetof (struct extent, plist) },
|
|
|
3281 { XD_END }
|
|
|
3282 };
|
|
|
3283
|
|
428
|
3284 static Lisp_Object
|
|
|
3285 extent_getprop (Lisp_Object obj, Lisp_Object prop)
|
|
|
3286 {
|
|
|
3287 return Fextent_property (obj, prop, Qunbound);
|
|
|
3288 }
|
|
|
3289
|
|
|
3290 static int
|
|
|
3291 extent_putprop (Lisp_Object obj, Lisp_Object prop, Lisp_Object value)
|
|
|
3292 {
|
|
|
3293 Fset_extent_property (obj, prop, value);
|
|
|
3294 return 1;
|
|
|
3295 }
|
|
|
3296
|
|
|
3297 static int
|
|
|
3298 extent_remprop (Lisp_Object obj, Lisp_Object prop)
|
|
|
3299 {
|
|
826
|
3300 Lisp_Object retval = Fset_extent_property (obj, prop, Qunbound);
|
|
|
3301 if (UNBOUNDP (retval))
|
|
|
3302 return -1;
|
|
|
3303 else if (!NILP (retval))
|
|
|
3304 return 1;
|
|
|
3305 else
|
|
|
3306 return 0;
|
|
428
|
3307 }
|
|
|
3308
|
|
|
3309 static Lisp_Object
|
|
|
3310 extent_plist (Lisp_Object obj)
|
|
|
3311 {
|
|
|
3312 return Fextent_properties (obj);
|
|
|
3313 }
|
|
|
3314
|
|
934
|
3315 DEFINE_BASIC_LRECORD_IMPLEMENTATION_WITH_PROPS ("extent", extent,
|
|
|
3316 1, /*dumpable-flag*/
|
|
|
3317 mark_extent,
|
|
|
3318 print_extent,
|
|
|
3319 /* NOTE: If you declare a
|
|
|
3320 finalization method here,
|
|
|
3321 it will NOT be called.
|
|
|
3322 Shaft city. */
|
|
|
3323 0,
|
|
|
3324 extent_equal, extent_hash,
|
|
|
3325 extent_description,
|
|
|
3326 extent_getprop, extent_putprop,
|
|
|
3327 extent_remprop, extent_plist,
|
|
|
3328 struct extent);
|
|
428
|
3329
|
|
|
3330 /************************************************************************/
|
|
|
3331 /* basic extent accessors */
|
|
|
3332 /************************************************************************/
|
|
|
3333
|
|
|
3334 /* These functions are for checking externally-passed extent objects
|
|
|
3335 and returning an extent's basic properties, which include the
|
|
|
3336 buffer the extent is associated with, the endpoints of the extent's
|
|
|
3337 range, the open/closed-ness of those endpoints, and whether the
|
|
|
3338 extent is detached. Manipulating these properties requires
|
|
|
3339 manipulating the ordered lists that hold extents; thus, functions
|
|
|
3340 to do that are in a later section. */
|
|
|
3341
|
|
|
3342 /* Given a Lisp_Object that is supposed to be an extent, make sure it
|
|
|
3343 is OK and return an extent pointer. Extents can be in one of four
|
|
|
3344 states:
|
|
|
3345
|
|
|
3346 1) destroyed
|
|
|
3347 2) detached and not associated with a buffer
|
|
|
3348 3) detached and associated with a buffer
|
|
|
3349 4) attached to a buffer
|
|
|
3350
|
|
|
3351 If FLAGS is 0, types 2-4 are allowed. If FLAGS is DE_MUST_HAVE_BUFFER,
|
|
|
3352 types 3-4 are allowed. If FLAGS is DE_MUST_BE_ATTACHED, only type 4
|
|
|
3353 is allowed.
|
|
|
3354 */
|
|
|
3355
|
|
|
3356 static EXTENT
|
|
|
3357 decode_extent (Lisp_Object extent_obj, unsigned int flags)
|
|
|
3358 {
|
|
|
3359 EXTENT extent;
|
|
|
3360 Lisp_Object obj;
|
|
|
3361
|
|
|
3362 CHECK_LIVE_EXTENT (extent_obj);
|
|
|
3363 extent = XEXTENT (extent_obj);
|
|
|
3364 obj = extent_object (extent);
|
|
|
3365
|
|
|
3366 /* the following condition will fail if we're dealing with a freed extent */
|
|
|
3367 assert (NILP (obj) || BUFFERP (obj) || STRINGP (obj));
|
|
|
3368
|
|
|
3369 if (flags & DE_MUST_BE_ATTACHED)
|
|
|
3370 flags |= DE_MUST_HAVE_BUFFER;
|
|
|
3371
|
|
|
3372 /* if buffer is dead, then convert extent to have no buffer. */
|
|
|
3373 if (BUFFERP (obj) && !BUFFER_LIVE_P (XBUFFER (obj)))
|
|
|
3374 obj = extent_object (extent) = Qnil;
|
|
|
3375
|
|
|
3376 assert (!NILP (obj) || extent_detached_p (extent));
|
|
|
3377
|
|
|
3378 if ((NILP (obj) && (flags & DE_MUST_HAVE_BUFFER))
|
|
|
3379 || (extent_detached_p (extent) && (flags & DE_MUST_BE_ATTACHED)))
|
|
|
3380 {
|
|
442
|
3381 invalid_argument ("extent doesn't belong to a buffer or string",
|
|
|
3382 extent_obj);
|
|
428
|
3383 }
|
|
|
3384
|
|
|
3385 return extent;
|
|
|
3386 }
|
|
|
3387
|
|
826
|
3388 /* Note that the returned value is a char position, not a byte position. */
|
|
428
|
3389
|
|
|
3390 static Lisp_Object
|
|
|
3391 extent_endpoint_external (Lisp_Object extent_obj, int endp)
|
|
|
3392 {
|
|
|
3393 EXTENT extent = decode_extent (extent_obj, 0);
|
|
|
3394
|
|
|
3395 if (extent_detached_p (extent))
|
|
|
3396 return Qnil;
|
|
|
3397 else
|
|
826
|
3398 return make_int (extent_endpoint_char (extent, endp));
|
|
428
|
3399 }
|
|
|
3400
|
|
|
3401 DEFUN ("extentp", Fextentp, 1, 1, 0, /*
|
|
|
3402 Return t if OBJECT is an extent.
|
|
|
3403 */
|
|
|
3404 (object))
|
|
|
3405 {
|
|
|
3406 return EXTENTP (object) ? Qt : Qnil;
|
|
|
3407 }
|
|
|
3408
|
|
|
3409 DEFUN ("extent-live-p", Fextent_live_p, 1, 1, 0, /*
|
|
|
3410 Return t if OBJECT is an extent that has not been destroyed.
|
|
|
3411 */
|
|
|
3412 (object))
|
|
|
3413 {
|
|
|
3414 return EXTENTP (object) && EXTENT_LIVE_P (XEXTENT (object)) ? Qt : Qnil;
|
|
|
3415 }
|
|
|
3416
|
|
|
3417 DEFUN ("extent-detached-p", Fextent_detached_p, 1, 1, 0, /*
|
|
|
3418 Return t if EXTENT is detached.
|
|
|
3419 */
|
|
|
3420 (extent))
|
|
|
3421 {
|
|
|
3422 return extent_detached_p (decode_extent (extent, 0)) ? Qt : Qnil;
|
|
|
3423 }
|
|
|
3424
|
|
|
3425 DEFUN ("extent-object", Fextent_object, 1, 1, 0, /*
|
|
|
3426 Return object (buffer or string) that EXTENT refers to.
|
|
|
3427 */
|
|
|
3428 (extent))
|
|
|
3429 {
|
|
|
3430 return extent_object (decode_extent (extent, 0));
|
|
|
3431 }
|
|
|
3432
|
|
|
3433 DEFUN ("extent-start-position", Fextent_start_position, 1, 1, 0, /*
|
|
|
3434 Return start position of EXTENT, or nil if EXTENT is detached.
|
|
|
3435 */
|
|
|
3436 (extent))
|
|
|
3437 {
|
|
|
3438 return extent_endpoint_external (extent, 0);
|
|
|
3439 }
|
|
|
3440
|
|
|
3441 DEFUN ("extent-end-position", Fextent_end_position, 1, 1, 0, /*
|
|
|
3442 Return end position of EXTENT, or nil if EXTENT is detached.
|
|
|
3443 */
|
|
|
3444 (extent))
|
|
|
3445 {
|
|
|
3446 return extent_endpoint_external (extent, 1);
|
|
|
3447 }
|
|
|
3448
|
|
|
3449 DEFUN ("extent-length", Fextent_length, 1, 1, 0, /*
|
|
|
3450 Return length of EXTENT in characters.
|
|
|
3451 */
|
|
|
3452 (extent))
|
|
|
3453 {
|
|
|
3454 EXTENT e = decode_extent (extent, DE_MUST_BE_ATTACHED);
|
|
826
|
3455 return make_int (extent_endpoint_char (e, 1)
|
|
|
3456 - extent_endpoint_char (e, 0));
|
|
428
|
3457 }
|
|
|
3458
|
|
|
3459 DEFUN ("next-extent", Fnext_extent, 1, 1, 0, /*
|
|
|
3460 Find next extent after EXTENT.
|
|
|
3461 If EXTENT is a buffer return the first extent in the buffer; likewise
|
|
|
3462 for strings.
|
|
|
3463 Extents in a buffer are ordered in what is called the "display"
|
|
|
3464 order, which sorts by increasing start positions and then by *decreasing*
|
|
|
3465 end positions.
|
|
|
3466 If you want to perform an operation on a series of extents, use
|
|
|
3467 `map-extents' instead of this function; it is much more efficient.
|
|
|
3468 The primary use of this function should be to enumerate all the
|
|
|
3469 extents in a buffer.
|
|
|
3470 Note: The display order is not necessarily the order that `map-extents'
|
|
|
3471 processes extents in!
|
|
|
3472 */
|
|
|
3473 (extent))
|
|
|
3474 {
|
|
|
3475 EXTENT next;
|
|
|
3476
|
|
|
3477 if (EXTENTP (extent))
|
|
|
3478 next = extent_next (decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
|
3479 else
|
|
|
3480 next = extent_first (decode_buffer_or_string (extent));
|
|
|
3481
|
|
|
3482 if (!next)
|
|
|
3483 return Qnil;
|
|
793
|
3484 return wrap_extent (next);
|
|
428
|
3485 }
|
|
|
3486
|
|
|
3487 DEFUN ("previous-extent", Fprevious_extent, 1, 1, 0, /*
|
|
|
3488 Find last extent before EXTENT.
|
|
|
3489 If EXTENT is a buffer return the last extent in the buffer; likewise
|
|
|
3490 for strings.
|
|
|
3491 This function is analogous to `next-extent'.
|
|
|
3492 */
|
|
|
3493 (extent))
|
|
|
3494 {
|
|
|
3495 EXTENT prev;
|
|
|
3496
|
|
|
3497 if (EXTENTP (extent))
|
|
|
3498 prev = extent_previous (decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
|
3499 else
|
|
|
3500 prev = extent_last (decode_buffer_or_string (extent));
|
|
|
3501
|
|
|
3502 if (!prev)
|
|
|
3503 return Qnil;
|
|
793
|
3504 return wrap_extent (prev);
|
|
428
|
3505 }
|
|
|
3506
|
|
|
3507 #ifdef DEBUG_XEMACS
|
|
|
3508
|
|
|
3509 DEFUN ("next-e-extent", Fnext_e_extent, 1, 1, 0, /*
|
|
|
3510 Find next extent after EXTENT using the "e" order.
|
|
|
3511 If EXTENT is a buffer return the first extent in the buffer; likewise
|
|
|
3512 for strings.
|
|
|
3513 */
|
|
|
3514 (extent))
|
|
|
3515 {
|
|
|
3516 EXTENT next;
|
|
|
3517
|
|
|
3518 if (EXTENTP (extent))
|
|
|
3519 next = extent_e_next (decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
|
3520 else
|
|
|
3521 next = extent_e_first (decode_buffer_or_string (extent));
|
|
|
3522
|
|
|
3523 if (!next)
|
|
|
3524 return Qnil;
|
|
793
|
3525 return wrap_extent (next);
|
|
428
|
3526 }
|
|
|
3527
|
|
|
3528 DEFUN ("previous-e-extent", Fprevious_e_extent, 1, 1, 0, /*
|
|
|
3529 Find last extent before EXTENT using the "e" order.
|
|
|
3530 If EXTENT is a buffer return the last extent in the buffer; likewise
|
|
|
3531 for strings.
|
|
|
3532 This function is analogous to `next-e-extent'.
|
|
|
3533 */
|
|
|
3534 (extent))
|
|
|
3535 {
|
|
|
3536 EXTENT prev;
|
|
|
3537
|
|
|
3538 if (EXTENTP (extent))
|
|
|
3539 prev = extent_e_previous (decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
|
3540 else
|
|
|
3541 prev = extent_e_last (decode_buffer_or_string (extent));
|
|
|
3542
|
|
|
3543 if (!prev)
|
|
|
3544 return Qnil;
|
|
793
|
3545 return wrap_extent (prev);
|
|
428
|
3546 }
|
|
|
3547
|
|
|
3548 #endif
|
|
|
3549
|
|
|
3550 DEFUN ("next-extent-change", Fnext_extent_change, 1, 2, 0, /*
|
|
|
3551 Return the next position after POS where an extent begins or ends.
|
|
|
3552 If POS is at the end of the buffer or string, POS will be returned;
|
|
|
3553 otherwise a position greater than POS will always be returned.
|
|
444
|
3554 If OBJECT is nil, the current buffer is assumed.
|
|
428
|
3555 */
|
|
|
3556 (pos, object))
|
|
|
3557 {
|
|
|
3558 Lisp_Object obj = decode_buffer_or_string (object);
|
|
826
|
3559 Bytexpos xpos;
|
|
|
3560
|
|
|
3561 xpos = get_buffer_or_string_pos_byte (obj, pos, GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
3562 xpos = extent_find_end_of_run (obj, xpos, 1);
|
|
|
3563 return make_int (buffer_or_string_bytexpos_to_charxpos (obj, xpos));
|
|
428
|
3564 }
|
|
|
3565
|
|
|
3566 DEFUN ("previous-extent-change", Fprevious_extent_change, 1, 2, 0, /*
|
|
|
3567 Return the last position before POS where an extent begins or ends.
|
|
|
3568 If POS is at the beginning of the buffer or string, POS will be returned;
|
|
|
3569 otherwise a position less than POS will always be returned.
|
|
|
3570 If OBJECT is nil, the current buffer is assumed.
|
|
|
3571 */
|
|
|
3572 (pos, object))
|
|
|
3573 {
|
|
|
3574 Lisp_Object obj = decode_buffer_or_string (object);
|
|
826
|
3575 Bytexpos xpos;
|
|
|
3576
|
|
|
3577 xpos = get_buffer_or_string_pos_byte (obj, pos, GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
3578 xpos = extent_find_beginning_of_run (obj, xpos, 1);
|
|
|
3579 return make_int (buffer_or_string_bytexpos_to_charxpos (obj, xpos));
|
|
428
|
3580 }
|
|
|
3581
|
|
|
3582
|
|
|
3583 /************************************************************************/
|
|
|
3584 /* parent and children stuff */
|
|
|
3585 /************************************************************************/
|
|
|
3586
|
|
|
3587 DEFUN ("extent-parent", Fextent_parent, 1, 1, 0, /*
|
|
|
3588 Return the parent (if any) of EXTENT.
|
|
|
3589 If an extent has a parent, it derives all its properties from that extent
|
|
|
3590 and has no properties of its own. (The only "properties" that the
|
|
|
3591 extent keeps are the buffer/string it refers to and the start and end
|
|
|
3592 points.) It is possible for an extent's parent to itself have a parent.
|
|
|
3593 */
|
|
|
3594 (extent))
|
|
|
3595 /* do I win the prize for the strangest split infinitive? */
|
|
|
3596 {
|
|
|
3597 EXTENT e = decode_extent (extent, 0);
|
|
|
3598 return extent_parent (e);
|
|
|
3599 }
|
|
|
3600
|
|
|
3601 DEFUN ("extent-children", Fextent_children, 1, 1, 0, /*
|
|
|
3602 Return a list of the children (if any) of EXTENT.
|
|
|
3603 The children of an extent are all those extents whose parent is that extent.
|
|
|
3604 This function does not recursively trace children of children.
|
|
|
3605 \(To do that, use `extent-descendants'.)
|
|
|
3606 */
|
|
|
3607 (extent))
|
|
|
3608 {
|
|
|
3609 EXTENT e = decode_extent (extent, 0);
|
|
|
3610 Lisp_Object children = extent_children (e);
|
|
|
3611
|
|
|
3612 if (!NILP (children))
|
|
|
3613 return Fcopy_sequence (XWEAK_LIST_LIST (children));
|
|
|
3614 else
|
|
|
3615 return Qnil;
|
|
|
3616 }
|
|
|
3617
|
|
|
3618 static void
|
|
|
3619 remove_extent_from_children_list (EXTENT e, Lisp_Object child)
|
|
|
3620 {
|
|
|
3621 Lisp_Object children = extent_children (e);
|
|
|
3622
|
|
|
3623 #ifdef ERROR_CHECK_EXTENTS
|
|
|
3624 assert (!NILP (memq_no_quit (child, XWEAK_LIST_LIST (children))));
|
|
|
3625 #endif
|
|
|
3626 XWEAK_LIST_LIST (children) =
|
|
|
3627 delq_no_quit (child, XWEAK_LIST_LIST (children));
|
|
|
3628 }
|
|
|
3629
|
|
|
3630 static void
|
|
|
3631 add_extent_to_children_list (EXTENT e, Lisp_Object child)
|
|
|
3632 {
|
|
|
3633 Lisp_Object children = extent_children (e);
|
|
|
3634
|
|
|
3635 if (NILP (children))
|
|
|
3636 {
|
|
|
3637 children = make_weak_list (WEAK_LIST_SIMPLE);
|
|
|
3638 set_extent_no_chase_aux_field (e, children, children);
|
|
|
3639 }
|
|
|
3640
|
|
|
3641 #ifdef ERROR_CHECK_EXTENTS
|
|
|
3642 assert (NILP (memq_no_quit (child, XWEAK_LIST_LIST (children))));
|
|
|
3643 #endif
|
|
|
3644 XWEAK_LIST_LIST (children) = Fcons (child, XWEAK_LIST_LIST (children));
|
|
|
3645 }
|
|
|
3646
|
|
826
|
3647
|
|
|
3648 static int
|
|
|
3649 compare_key_value_pairs (const void *humpty, const void *dumpty)
|
|
|
3650 {
|
|
|
3651 Lisp_Object_pair *foo = (Lisp_Object_pair *) humpty;
|
|
|
3652 Lisp_Object_pair *bar = (Lisp_Object_pair *) dumpty;
|
|
|
3653 if (EQ (foo->key, bar->key))
|
|
|
3654 return 0;
|
|
|
3655 return !NILP (Fstring_lessp (foo->key, bar->key)) ? -1 : 1;
|
|
|
3656 }
|
|
|
3657
|
|
428
|
3658 DEFUN ("set-extent-parent", Fset_extent_parent, 2, 2, 0, /*
|
|
|
3659 Set the parent of EXTENT to PARENT (may be nil).
|
|
|
3660 See `extent-parent'.
|
|
|
3661 */
|
|
|
3662 (extent, parent))
|
|
|
3663 {
|
|
|
3664 EXTENT e = decode_extent (extent, 0);
|
|
|
3665 Lisp_Object cur_parent = extent_parent (e);
|
|
|
3666 Lisp_Object rest;
|
|
|
3667
|
|
793
|
3668 extent = wrap_extent (e);
|
|
428
|
3669 if (!NILP (parent))
|
|
|
3670 CHECK_LIVE_EXTENT (parent);
|
|
|
3671 if (EQ (parent, cur_parent))
|
|
|
3672 return Qnil;
|
|
|
3673 for (rest = parent; !NILP (rest); rest = extent_parent (XEXTENT (rest)))
|
|
|
3674 if (EQ (rest, extent))
|
|
563
|
3675 signal_error (Qinvalid_change,
|
|
442
|
3676 "Circular parent chain would result",
|
|
|
3677 extent);
|
|
428
|
3678 if (NILP (parent))
|
|
|
3679 {
|
|
|
3680 remove_extent_from_children_list (XEXTENT (cur_parent), extent);
|
|
|
3681 set_extent_no_chase_aux_field (e, parent, Qnil);
|
|
|
3682 e->flags.has_parent = 0;
|
|
|
3683 }
|
|
|
3684 else
|
|
|
3685 {
|
|
|
3686 add_extent_to_children_list (XEXTENT (parent), extent);
|
|
|
3687 set_extent_no_chase_aux_field (e, parent, parent);
|
|
|
3688 e->flags.has_parent = 1;
|
|
|
3689 }
|
|
|
3690 /* changing the parent also changes the properties of all children. */
|
|
|
3691 {
|
|
826
|
3692 Lisp_Object_pair_dynarr *oldprops, *newprops;
|
|
|
3693 int i, orignewlength;
|
|
|
3694
|
|
|
3695 /* perhaps there's a smarter way, but the following will work,
|
|
|
3696 and it's O(N*log N):
|
|
|
3697
|
|
|
3698 (1) get the old props.
|
|
|
3699 (2) get the new props.
|
|
|
3700 (3) sort both.
|
|
|
3701 (4) loop through old props; if key not in new, add it, with value
|
|
|
3702 Qunbound.
|
|
|
3703 (5) vice-versa for new props.
|
|
|
3704 (6) sort both again.
|
|
|
3705 (7) now we have identical lists of keys; we run through and compare
|
|
|
3706 the values.
|
|
|
3707
|
|
|
3708 Of course in reality the number of properties will be low, so
|
|
|
3709 an N^2 algorithm wouldn't be a problem, but the stuff below is just
|
|
|
3710 as easy to write given the existence of qsort and bsearch.
|
|
|
3711 */
|
|
|
3712
|
|
|
3713 oldprops = Dynarr_new (Lisp_Object_pair);
|
|
|
3714 newprops = Dynarr_new (Lisp_Object_pair);
|
|
|
3715 if (!NILP (cur_parent))
|
|
|
3716 extent_properties (XEXTENT (cur_parent), oldprops);
|
|
|
3717 if (!NILP (parent))
|
|
|
3718 extent_properties (XEXTENT (parent), newprops);
|
|
|
3719
|
|
|
3720 qsort (Dynarr_atp (oldprops, 0), Dynarr_length (oldprops),
|
|
|
3721 sizeof (Lisp_Object_pair), compare_key_value_pairs);
|
|
|
3722 qsort (Dynarr_atp (newprops, 0), Dynarr_length (newprops),
|
|
|
3723 sizeof (Lisp_Object_pair), compare_key_value_pairs);
|
|
|
3724 orignewlength = Dynarr_length (newprops);
|
|
|
3725 for (i = 0; i < Dynarr_length (oldprops); i++)
|
|
|
3726 {
|
|
|
3727 if (!bsearch (Dynarr_atp (oldprops, i), Dynarr_atp (newprops, 0),
|
|
|
3728 Dynarr_length (newprops), sizeof (Lisp_Object_pair),
|
|
|
3729 compare_key_value_pairs))
|
|
|
3730 {
|
|
|
3731 Lisp_Object_pair new;
|
|
|
3732 new.key = Dynarr_at (oldprops, i).key;
|
|
|
3733 new.value = Qunbound;
|
|
|
3734 Dynarr_add (newprops, new);
|
|
|
3735 }
|
|
|
3736 }
|
|
|
3737 for (i = 0; i < orignewlength; i++)
|
|
|
3738 {
|
|
859
|
3739 if (!Dynarr_length (oldprops) || !bsearch (Dynarr_atp (newprops, i),
|
|
|
3740 Dynarr_atp (oldprops, 0),
|
|
|
3741 Dynarr_length (oldprops),
|
|
|
3742 sizeof (Lisp_Object_pair),
|
|
|
3743 compare_key_value_pairs))
|
|
826
|
3744 {
|
|
|
3745 Lisp_Object_pair new;
|
|
|
3746 new.key = Dynarr_at (newprops, i).key;
|
|
|
3747 new.value = Qunbound;
|
|
|
3748 Dynarr_add (oldprops, new);
|
|
|
3749 }
|
|
|
3750 }
|
|
|
3751 qsort (Dynarr_atp (oldprops, 0), Dynarr_length (oldprops),
|
|
|
3752 sizeof (Lisp_Object_pair), compare_key_value_pairs);
|
|
|
3753 qsort (Dynarr_atp (newprops, 0), Dynarr_length (newprops),
|
|
|
3754 sizeof (Lisp_Object_pair), compare_key_value_pairs);
|
|
|
3755 for (i = 0; i < Dynarr_length (oldprops); i++)
|
|
|
3756 {
|
|
|
3757 assert (EQ (Dynarr_at (oldprops, i).key, Dynarr_at (newprops, i).key));
|
|
|
3758 if (!EQ (Dynarr_at (oldprops, i).value, Dynarr_at (newprops, i).value))
|
|
|
3759 signal_extent_property_changed (e, Dynarr_at (oldprops, i).key, 1);
|
|
|
3760 }
|
|
|
3761
|
|
|
3762 Dynarr_free (oldprops);
|
|
|
3763 Dynarr_free (newprops);
|
|
|
3764 #if 0
|
|
|
3765 {
|
|
428
|
3766 int old_invis = (!NILP (cur_parent) &&
|
|
|
3767 !NILP (extent_invisible (XEXTENT (cur_parent))));
|
|
|
3768 int new_invis = (!NILP (parent) &&
|
|
|
3769 !NILP (extent_invisible (XEXTENT (parent))));
|
|
|
3770
|
|
|
3771 extent_maybe_changed_for_redisplay (e, 1, new_invis != old_invis);
|
|
|
3772 }
|
|
826
|
3773 #endif /* 0 */
|
|
|
3774 }
|
|
428
|
3775 return Qnil;
|
|
|
3776 }
|
|
|
3777
|
|
|
3778
|
|
|
3779 /************************************************************************/
|
|
|
3780 /* basic extent mutators */
|
|
|
3781 /************************************************************************/
|
|
|
3782
|
|
|
3783 /* Note: If you track non-duplicable extents by undo, you'll get bogus
|
|
|
3784 undo records for transient extents via update-extent.
|
|
|
3785 For example, query-replace will do this.
|
|
|
3786 */
|
|
|
3787
|
|
|
3788 static void
|
|
826
|
3789 set_extent_endpoints_1 (EXTENT extent, Memxpos start, Memxpos end)
|
|
428
|
3790 {
|
|
|
3791 #ifdef ERROR_CHECK_EXTENTS
|
|
|
3792 Lisp_Object obj = extent_object (extent);
|
|
|
3793
|
|
|
3794 assert (start <= end);
|
|
|
3795 if (BUFFERP (obj))
|
|
|
3796 {
|
|
665
|
3797 assert (valid_membpos_p (XBUFFER (obj), start));
|
|
|
3798 assert (valid_membpos_p (XBUFFER (obj), end));
|
|
428
|
3799 }
|
|
|
3800 #endif
|
|
|
3801
|
|
|
3802 /* Optimization: if the extent is already where we want it to be,
|
|
|
3803 do nothing. */
|
|
|
3804 if (!extent_detached_p (extent) && extent_start (extent) == start &&
|
|
|
3805 extent_end (extent) == end)
|
|
|
3806 return;
|
|
|
3807
|
|
|
3808 if (extent_detached_p (extent))
|
|
|
3809 {
|
|
|
3810 if (extent_duplicable_p (extent))
|
|
|
3811 {
|
|
793
|
3812 Lisp_Object extent_obj = wrap_extent (extent);
|
|
|
3813
|
|
428
|
3814 record_extent (extent_obj, 1);
|
|
|
3815 }
|
|
|
3816 }
|
|
|
3817 else
|
|
|
3818 extent_detach (extent);
|
|
|
3819
|
|
|
3820 set_extent_start (extent, start);
|
|
|
3821 set_extent_end (extent, end);
|
|
|
3822 extent_attach (extent);
|
|
|
3823 }
|
|
|
3824
|
|
|
3825 /* Set extent's endpoints to S and E, and put extent in buffer or string
|
|
|
3826 OBJECT. (If OBJECT is nil, do not change the extent's object.) */
|
|
|
3827
|
|
|
3828 void
|
|
826
|
3829 set_extent_endpoints (EXTENT extent, Bytexpos s, Bytexpos e,
|
|
|
3830 Lisp_Object object)
|
|
|
3831 {
|
|
|
3832 Memxpos start, end;
|
|
428
|
3833
|
|
|
3834 if (NILP (object))
|
|
|
3835 {
|
|
|
3836 object = extent_object (extent);
|
|
|
3837 assert (!NILP (object));
|
|
|
3838 }
|
|
|
3839 else if (!EQ (object, extent_object (extent)))
|
|
|
3840 {
|
|
|
3841 extent_detach (extent);
|
|
|
3842 extent_object (extent) = object;
|
|
|
3843 }
|
|
|
3844
|
|
|
3845 start = s < 0 ? extent_start (extent) :
|
|
826
|
3846 buffer_or_string_bytexpos_to_memxpos (object, s);
|
|
428
|
3847 end = e < 0 ? extent_end (extent) :
|
|
826
|
3848 buffer_or_string_bytexpos_to_memxpos (object, e);
|
|
428
|
3849 set_extent_endpoints_1 (extent, start, end);
|
|
|
3850 }
|
|
|
3851
|
|
|
3852 static void
|
|
|
3853 set_extent_openness (EXTENT extent, int start_open, int end_open)
|
|
|
3854 {
|
|
|
3855 if (start_open != -1)
|
|
826
|
3856 {
|
|
|
3857 extent_start_open_p (extent) = start_open;
|
|
|
3858 signal_extent_property_changed (extent, Qstart_open, 1);
|
|
|
3859 }
|
|
428
|
3860 if (end_open != -1)
|
|
826
|
3861 {
|
|
|
3862 extent_end_open_p (extent) = end_open;
|
|
|
3863 signal_extent_property_changed (extent, Qend_open, 1);
|
|
|
3864 }
|
|
428
|
3865 }
|
|
|
3866
|
|
|
3867 static EXTENT
|
|
826
|
3868 make_extent (Lisp_Object object, Bytexpos from, Bytexpos to)
|
|
428
|
3869 {
|
|
|
3870 EXTENT extent;
|
|
|
3871
|
|
|
3872 extent = make_extent_detached (object);
|
|
|
3873 set_extent_endpoints (extent, from, to, Qnil);
|
|
|
3874 return extent;
|
|
|
3875 }
|
|
|
3876
|
|
826
|
3877 /* Copy ORIGINAL, changing it to span FROM,TO in OBJECT. */
|
|
|
3878
|
|
428
|
3879 static EXTENT
|
|
826
|
3880 copy_extent (EXTENT original, Bytexpos from, Bytexpos to, Lisp_Object object)
|
|
428
|
3881 {
|
|
|
3882 EXTENT e;
|
|
|
3883
|
|
|
3884 e = make_extent_detached (object);
|
|
|
3885 if (from >= 0)
|
|
|
3886 set_extent_endpoints (e, from, to, Qnil);
|
|
|
3887
|
|
|
3888 e->plist = Fcopy_sequence (original->plist);
|
|
|
3889 memcpy (&e->flags, &original->flags, sizeof (e->flags));
|
|
|
3890 if (e->flags.has_aux)
|
|
|
3891 {
|
|
|
3892 /* also need to copy the aux struct. It won't work for
|
|
|
3893 this extent to share the same aux struct as the original
|
|
|
3894 one. */
|
|
|
3895 struct extent_auxiliary *data =
|
|
|
3896 alloc_lcrecord_type (struct extent_auxiliary,
|
|
|
3897 &lrecord_extent_auxiliary);
|
|
|
3898
|
|
|
3899 copy_lcrecord (data, XEXTENT_AUXILIARY (XCAR (original->plist)));
|
|
793
|
3900 XCAR (e->plist) = wrap_extent_auxiliary (data);
|
|
428
|
3901 }
|
|
|
3902
|
|
|
3903 {
|
|
|
3904 /* we may have just added another child to the parent extent. */
|
|
|
3905 Lisp_Object parent = extent_parent (e);
|
|
|
3906 if (!NILP (parent))
|
|
|
3907 {
|
|
793
|
3908 Lisp_Object extent = wrap_extent (e);
|
|
|
3909
|
|
428
|
3910 add_extent_to_children_list (XEXTENT (parent), extent);
|
|
|
3911 }
|
|
|
3912 }
|
|
|
3913
|
|
|
3914 return e;
|
|
|
3915 }
|
|
|
3916
|
|
|
3917 static void
|
|
|
3918 destroy_extent (EXTENT extent)
|
|
|
3919 {
|
|
|
3920 Lisp_Object rest, nextrest, children;
|
|
|
3921 Lisp_Object extent_obj;
|
|
|
3922
|
|
|
3923 if (!extent_detached_p (extent))
|
|
|
3924 extent_detach (extent);
|
|
|
3925 /* disassociate the extent from its children and parent */
|
|
|
3926 children = extent_children (extent);
|
|
|
3927 if (!NILP (children))
|
|
|
3928 {
|
|
|
3929 LIST_LOOP_DELETING (rest, nextrest, XWEAK_LIST_LIST (children))
|
|
|
3930 Fset_extent_parent (XCAR (rest), Qnil);
|
|
|
3931 }
|
|
793
|
3932 extent_obj = wrap_extent (extent);
|
|
428
|
3933 Fset_extent_parent (extent_obj, Qnil);
|
|
|
3934 /* mark the extent as destroyed */
|
|
|
3935 extent_object (extent) = Qt;
|
|
|
3936 }
|
|
|
3937
|
|
|
3938 DEFUN ("make-extent", Fmake_extent, 2, 3, 0, /*
|
|
|
3939 Make an extent for the range [FROM, TO) in BUFFER-OR-STRING.
|
|
|
3940 BUFFER-OR-STRING defaults to the current buffer. Insertions at point
|
|
|
3941 TO will be outside of the extent; insertions at FROM will be inside the
|
|
|
3942 extent, causing the extent to grow. (This is the same way that markers
|
|
|
3943 behave.) You can change the behavior of insertions at the endpoints
|
|
|
3944 using `set-extent-property'. The extent is initially detached if both
|
|
|
3945 FROM and TO are nil, and in this case BUFFER-OR-STRING defaults to nil,
|
|
|
3946 meaning the extent is in no buffer and no string.
|
|
|
3947 */
|
|
|
3948 (from, to, buffer_or_string))
|
|
|
3949 {
|
|
|
3950 Lisp_Object extent_obj;
|
|
|
3951 Lisp_Object obj;
|
|
|
3952
|
|
|
3953 obj = decode_buffer_or_string (buffer_or_string);
|
|
|
3954 if (NILP (from) && NILP (to))
|
|
|
3955 {
|
|
|
3956 if (NILP (buffer_or_string))
|
|
|
3957 obj = Qnil;
|
|
793
|
3958 extent_obj = wrap_extent (make_extent_detached (obj));
|
|
428
|
3959 }
|
|
|
3960 else
|
|
|
3961 {
|
|
826
|
3962 Bytexpos start, end;
|
|
428
|
3963
|
|
|
3964 get_buffer_or_string_range_byte (obj, from, to, &start, &end,
|
|
|
3965 GB_ALLOW_PAST_ACCESSIBLE);
|
|
826
|
3966 extent_obj = wrap_extent (make_extent (obj, start, end));
|
|
428
|
3967 }
|
|
|
3968 return extent_obj;
|
|
|
3969 }
|
|
|
3970
|
|
|
3971 DEFUN ("copy-extent", Fcopy_extent, 1, 2, 0, /*
|
|
|
3972 Make a copy of EXTENT. It is initially detached.
|
|
|
3973 Optional argument BUFFER-OR-STRING defaults to EXTENT's buffer or string.
|
|
|
3974 */
|
|
|
3975 (extent, buffer_or_string))
|
|
|
3976 {
|
|
|
3977 EXTENT ext = decode_extent (extent, 0);
|
|
|
3978
|
|
|
3979 if (NILP (buffer_or_string))
|
|
|
3980 buffer_or_string = extent_object (ext);
|
|
|
3981 else
|
|
|
3982 buffer_or_string = decode_buffer_or_string (buffer_or_string);
|
|
|
3983
|
|
793
|
3984 return wrap_extent (copy_extent (ext, -1, -1, buffer_or_string));
|
|
428
|
3985 }
|
|
|
3986
|
|
|
3987 DEFUN ("delete-extent", Fdelete_extent, 1, 1, 0, /*
|
|
|
3988 Remove EXTENT from its buffer and destroy it.
|
|
|
3989 This does not modify the buffer's text, only its display properties.
|
|
|
3990 The extent cannot be used thereafter.
|
|
|
3991 */
|
|
|
3992 (extent))
|
|
|
3993 {
|
|
|
3994 EXTENT ext;
|
|
|
3995
|
|
|
3996 /* We do not call decode_extent() here because already-destroyed
|
|
|
3997 extents are OK. */
|
|
|
3998 CHECK_EXTENT (extent);
|
|
|
3999 ext = XEXTENT (extent);
|
|
|
4000
|
|
|
4001 if (!EXTENT_LIVE_P (ext))
|
|
|
4002 return Qnil;
|
|
|
4003 destroy_extent (ext);
|
|
|
4004 return Qnil;
|
|
|
4005 }
|
|
|
4006
|
|
|
4007 DEFUN ("detach-extent", Fdetach_extent, 1, 1, 0, /*
|
|
|
4008 Remove EXTENT from its buffer in such a way that it can be re-inserted.
|
|
|
4009 An extent is also detached when all of its characters are all killed by a
|
|
|
4010 deletion, unless its `detachable' property has been unset.
|
|
|
4011
|
|
|
4012 Extents which have the `duplicable' attribute are tracked by the undo
|
|
|
4013 mechanism. Detachment via `detach-extent' and string deletion is recorded,
|
|
|
4014 as is attachment via `insert-extent' and string insertion. Extent motion,
|
|
|
4015 face changes, and attachment via `make-extent' and `set-extent-endpoints'
|
|
|
4016 are not recorded. This means that extent changes which are to be undo-able
|
|
|
4017 must be performed by character editing, or by insertion and detachment of
|
|
|
4018 duplicable extents.
|
|
|
4019 */
|
|
|
4020 (extent))
|
|
|
4021 {
|
|
|
4022 EXTENT ext = decode_extent (extent, 0);
|
|
|
4023
|
|
|
4024 if (extent_detached_p (ext))
|
|
|
4025 return extent;
|
|
|
4026 if (extent_duplicable_p (ext))
|
|
|
4027 record_extent (extent, 0);
|
|
|
4028 extent_detach (ext);
|
|
|
4029
|
|
|
4030 return extent;
|
|
|
4031 }
|
|
|
4032
|
|
|
4033 DEFUN ("set-extent-endpoints", Fset_extent_endpoints, 3, 4, 0, /*
|
|
|
4034 Set the endpoints of EXTENT to START, END.
|
|
|
4035 If START and END are null, call detach-extent on EXTENT.
|
|
|
4036 BUFFER-OR-STRING specifies the new buffer or string that the extent should
|
|
|
4037 be in, and defaults to EXTENT's buffer or string. (If nil, and EXTENT
|
|
|
4038 is in no buffer and no string, it defaults to the current buffer.)
|
|
|
4039 See documentation on `detach-extent' for a discussion of undo recording.
|
|
|
4040 */
|
|
|
4041 (extent, start, end, buffer_or_string))
|
|
|
4042 {
|
|
|
4043 EXTENT ext;
|
|
826
|
4044 Bytexpos s, e;
|
|
428
|
4045
|
|
|
4046 ext = decode_extent (extent, 0);
|
|
|
4047
|
|
|
4048 if (NILP (buffer_or_string))
|
|
|
4049 {
|
|
|
4050 buffer_or_string = extent_object (ext);
|
|
|
4051 if (NILP (buffer_or_string))
|
|
|
4052 buffer_or_string = Fcurrent_buffer ();
|
|
|
4053 }
|
|
|
4054 else
|
|
|
4055 buffer_or_string = decode_buffer_or_string (buffer_or_string);
|
|
|
4056
|
|
|
4057 if (NILP (start) && NILP (end))
|
|
|
4058 return Fdetach_extent (extent);
|
|
|
4059
|
|
|
4060 get_buffer_or_string_range_byte (buffer_or_string, start, end, &s, &e,
|
|
|
4061 GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
4062
|
|
468
|
4063 buffer_or_string_extent_info_force (buffer_or_string);
|
|
428
|
4064 set_extent_endpoints (ext, s, e, buffer_or_string);
|
|
|
4065 return extent;
|
|
|
4066 }
|
|
|
4067
|
|
|
4068
|
|
|
4069 /************************************************************************/
|
|
|
4070 /* mapping over extents */
|
|
|
4071 /************************************************************************/
|
|
|
4072
|
|
|
4073 static unsigned int
|
|
|
4074 decode_map_extents_flags (Lisp_Object flags)
|
|
|
4075 {
|
|
|
4076 unsigned int retval = 0;
|
|
|
4077 unsigned int all_extents_specified = 0;
|
|
|
4078 unsigned int in_region_specified = 0;
|
|
|
4079
|
|
|
4080 if (EQ (flags, Qt)) /* obsoleteness compatibility */
|
|
|
4081 return ME_END_CLOSED;
|
|
|
4082 if (NILP (flags))
|
|
|
4083 return 0;
|
|
|
4084 if (SYMBOLP (flags))
|
|
|
4085 flags = Fcons (flags, Qnil);
|
|
|
4086 while (!NILP (flags))
|
|
|
4087 {
|
|
|
4088 Lisp_Object sym;
|
|
|
4089 CHECK_CONS (flags);
|
|
|
4090 sym = XCAR (flags);
|
|
|
4091 CHECK_SYMBOL (sym);
|
|
|
4092 if (EQ (sym, Qall_extents_closed) || EQ (sym, Qall_extents_open) ||
|
|
|
4093 EQ (sym, Qall_extents_closed_open) ||
|
|
|
4094 EQ (sym, Qall_extents_open_closed))
|
|
|
4095 {
|
|
|
4096 if (all_extents_specified)
|
|
563
|
4097 invalid_argument ("Only one `all-extents-*' flag may be specified", Qunbound);
|
|
428
|
4098 all_extents_specified = 1;
|
|
|
4099 }
|
|
|
4100 if (EQ (sym, Qstart_in_region) || EQ (sym, Qend_in_region) ||
|
|
|
4101 EQ (sym, Qstart_and_end_in_region) ||
|
|
|
4102 EQ (sym, Qstart_or_end_in_region))
|
|
|
4103 {
|
|
|
4104 if (in_region_specified)
|
|
563
|
4105 invalid_argument ("Only one `*-in-region' flag may be specified", Qunbound);
|
|
428
|
4106 in_region_specified = 1;
|
|
|
4107 }
|
|
|
4108
|
|
|
4109 /* I do so love that conditional operator ... */
|
|
|
4110 retval |=
|
|
|
4111 EQ (sym, Qend_closed) ? ME_END_CLOSED :
|
|
|
4112 EQ (sym, Qstart_open) ? ME_START_OPEN :
|
|
|
4113 EQ (sym, Qall_extents_closed) ? ME_ALL_EXTENTS_CLOSED :
|
|
|
4114 EQ (sym, Qall_extents_open) ? ME_ALL_EXTENTS_OPEN :
|
|
|
4115 EQ (sym, Qall_extents_closed_open) ? ME_ALL_EXTENTS_CLOSED_OPEN :
|
|
|
4116 EQ (sym, Qall_extents_open_closed) ? ME_ALL_EXTENTS_OPEN_CLOSED :
|
|
|
4117 EQ (sym, Qstart_in_region) ? ME_START_IN_REGION :
|
|
|
4118 EQ (sym, Qend_in_region) ? ME_END_IN_REGION :
|
|
|
4119 EQ (sym, Qstart_and_end_in_region) ? ME_START_AND_END_IN_REGION :
|
|
|
4120 EQ (sym, Qstart_or_end_in_region) ? ME_START_OR_END_IN_REGION :
|
|
|
4121 EQ (sym, Qnegate_in_region) ? ME_NEGATE_IN_REGION :
|
|
563
|
4122 (invalid_constant ("Invalid `map-extents' flag", sym), 0);
|
|
428
|
4123
|
|
|
4124 flags = XCDR (flags);
|
|
|
4125 }
|
|
|
4126 return retval;
|
|
|
4127 }
|
|
|
4128
|
|
|
4129 DEFUN ("extent-in-region-p", Fextent_in_region_p, 1, 4, 0, /*
|
|
|
4130 Return whether EXTENT overlaps a specified region.
|
|
|
4131 This is equivalent to whether `map-extents' would visit EXTENT when called
|
|
|
4132 with these args.
|
|
|
4133 */
|
|
|
4134 (extent, from, to, flags))
|
|
|
4135 {
|
|
826
|
4136 Bytexpos start, end;
|
|
428
|
4137 EXTENT ext = decode_extent (extent, DE_MUST_BE_ATTACHED);
|
|
|
4138 Lisp_Object obj = extent_object (ext);
|
|
|
4139
|
|
|
4140 get_buffer_or_string_range_byte (obj, from, to, &start, &end, GB_ALLOW_NIL |
|
|
|
4141 GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
4142
|
|
|
4143 return extent_in_region_p (ext, start, end, decode_map_extents_flags (flags)) ?
|
|
|
4144 Qt : Qnil;
|
|
|
4145 }
|
|
|
4146
|
|
|
4147 struct slow_map_extents_arg
|
|
|
4148 {
|
|
|
4149 Lisp_Object map_arg;
|
|
|
4150 Lisp_Object map_routine;
|
|
|
4151 Lisp_Object result;
|
|
|
4152 Lisp_Object property;
|
|
|
4153 Lisp_Object value;
|
|
|
4154 };
|
|
|
4155
|
|
|
4156 static int
|
|
|
4157 slow_map_extents_function (EXTENT extent, void *arg)
|
|
|
4158 {
|
|
|
4159 /* This function can GC */
|
|
|
4160 struct slow_map_extents_arg *closure = (struct slow_map_extents_arg *) arg;
|
|
793
|
4161 Lisp_Object extent_obj = wrap_extent (extent);
|
|
|
4162
|
|
428
|
4163
|
|
|
4164 /* make sure this extent qualifies according to the PROPERTY
|
|
|
4165 and VALUE args */
|
|
|
4166
|
|
|
4167 if (!NILP (closure->property))
|
|
|
4168 {
|
|
|
4169 Lisp_Object value = Fextent_property (extent_obj, closure->property,
|
|
|
4170 Qnil);
|
|
|
4171 if ((NILP (closure->value) && NILP (value)) ||
|
|
|
4172 (!NILP (closure->value) && !EQ (value, closure->value)))
|
|
|
4173 return 0;
|
|
|
4174 }
|
|
|
4175
|
|
|
4176 closure->result = call2 (closure->map_routine, extent_obj,
|
|
|
4177 closure->map_arg);
|
|
|
4178 return !NILP (closure->result);
|
|
|
4179 }
|
|
|
4180
|
|
|
4181 DEFUN ("map-extents", Fmap_extents, 1, 8, 0, /*
|
|
|
4182 Map FUNCTION over the extents which overlap a region in OBJECT.
|
|
|
4183 OBJECT is normally a buffer or string but could be an extent (see below).
|
|
|
4184 The region is normally bounded by [FROM, TO) (i.e. the beginning of the
|
|
|
4185 region is closed and the end of the region is open), but this can be
|
|
|
4186 changed with the FLAGS argument (see below for a complete discussion).
|
|
|
4187
|
|
|
4188 FUNCTION is called with the arguments (extent, MAPARG). The arguments
|
|
|
4189 OBJECT, FROM, TO, MAPARG, and FLAGS are all optional and default to
|
|
|
4190 the current buffer, the beginning of OBJECT, the end of OBJECT, nil,
|
|
|
4191 and nil, respectively. `map-extents' returns the first non-nil result
|
|
|
4192 produced by FUNCTION, and no more calls to FUNCTION are made after it
|
|
|
4193 returns non-nil.
|
|
|
4194
|
|
|
4195 If OBJECT is an extent, FROM and TO default to the extent's endpoints,
|
|
|
4196 and the mapping omits that extent and its predecessors. This feature
|
|
|
4197 supports restarting a loop based on `map-extents'. Note: OBJECT must
|
|
|
4198 be attached to a buffer or string, and the mapping is done over that
|
|
|
4199 buffer or string.
|
|
|
4200
|
|
|
4201 An extent overlaps the region if there is any point in the extent that is
|
|
|
4202 also in the region. (For the purpose of overlap, zero-length extents and
|
|
|
4203 regions are treated as closed on both ends regardless of their endpoints'
|
|
|
4204 specified open/closedness.) Note that the endpoints of an extent or region
|
|
|
4205 are considered to be in that extent or region if and only if the
|
|
|
4206 corresponding end is closed. For example, the extent [5,7] overlaps the
|
|
|
4207 region [2,5] because 5 is in both the extent and the region. However, (5,7]
|
|
|
4208 does not overlap [2,5] because 5 is not in the extent, and neither [5,7] nor
|
|
|
4209 \(5,7] overlaps the region [2,5) because 5 is not in the region.
|
|
|
4210
|
|
|
4211 The optional FLAGS can be a symbol or a list of one or more symbols,
|
|
|
4212 modifying the behavior of `map-extents'. Allowed symbols are:
|
|
|
4213
|
|
|
4214 end-closed The region's end is closed.
|
|
|
4215
|
|
|
4216 start-open The region's start is open.
|
|
|
4217
|
|
|
4218 all-extents-closed Treat all extents as closed on both ends for the
|
|
|
4219 purpose of determining whether they overlap the
|
|
|
4220 region, irrespective of their actual open- or
|
|
|
4221 closedness.
|
|
|
4222 all-extents-open Treat all extents as open on both ends.
|
|
|
4223 all-extents-closed-open Treat all extents as start-closed, end-open.
|
|
|
4224 all-extents-open-closed Treat all extents as start-open, end-closed.
|
|
|
4225
|
|
|
4226 start-in-region In addition to the above conditions for extent
|
|
|
4227 overlap, the extent's start position must lie within
|
|
|
4228 the specified region. Note that, for this
|
|
|
4229 condition, open start positions are treated as if
|
|
|
4230 0.5 was added to the endpoint's value, and open
|
|
|
4231 end positions are treated as if 0.5 was subtracted
|
|
|
4232 from the endpoint's value.
|
|
|
4233 end-in-region The extent's end position must lie within the
|
|
|
4234 region.
|
|
|
4235 start-and-end-in-region Both the extent's start and end positions must lie
|
|
|
4236 within the region.
|
|
|
4237 start-or-end-in-region Either the extent's start or end position must lie
|
|
|
4238 within the region.
|
|
|
4239
|
|
|
4240 negate-in-region The condition specified by a `*-in-region' flag
|
|
|
4241 must NOT hold for the extent to be considered.
|
|
|
4242
|
|
|
4243
|
|
|
4244 At most one of `all-extents-closed', `all-extents-open',
|
|
|
4245 `all-extents-closed-open', and `all-extents-open-closed' may be specified.
|
|
|
4246
|
|
|
4247 At most one of `start-in-region', `end-in-region',
|
|
|
4248 `start-and-end-in-region', and `start-or-end-in-region' may be specified.
|
|
|
4249
|
|
|
4250 If optional arg PROPERTY is non-nil, only extents with that property set
|
|
|
4251 on them will be visited. If optional arg VALUE is non-nil, only extents
|
|
|
4252 whose value for that property is `eq' to VALUE will be visited.
|
|
|
4253 */
|
|
|
4254 (function, object, from, to, maparg, flags, property, value))
|
|
|
4255 {
|
|
|
4256 /* This function can GC */
|
|
|
4257 struct slow_map_extents_arg closure;
|
|
|
4258 unsigned int me_flags;
|
|
826
|
4259 Bytexpos start, end;
|
|
428
|
4260 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4261 EXTENT after = 0;
|
|
|
4262
|
|
|
4263 if (EXTENTP (object))
|
|
|
4264 {
|
|
|
4265 after = decode_extent (object, DE_MUST_BE_ATTACHED);
|
|
|
4266 if (NILP (from))
|
|
|
4267 from = Fextent_start_position (object);
|
|
|
4268 if (NILP (to))
|
|
|
4269 to = Fextent_end_position (object);
|
|
|
4270 object = extent_object (after);
|
|
|
4271 }
|
|
|
4272 else
|
|
|
4273 object = decode_buffer_or_string (object);
|
|
|
4274
|
|
|
4275 get_buffer_or_string_range_byte (object, from, to, &start, &end,
|
|
|
4276 GB_ALLOW_NIL | GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
4277
|
|
|
4278 me_flags = decode_map_extents_flags (flags);
|
|
|
4279
|
|
|
4280 if (!NILP (property))
|
|
|
4281 {
|
|
|
4282 if (!NILP (value))
|
|
|
4283 value = canonicalize_extent_property (property, value);
|
|
|
4284 }
|
|
|
4285
|
|
|
4286 GCPRO5 (function, maparg, object, property, value);
|
|
|
4287
|
|
|
4288 closure.map_arg = maparg;
|
|
|
4289 closure.map_routine = function;
|
|
|
4290 closure.result = Qnil;
|
|
|
4291 closure.property = property;
|
|
|
4292 closure.value = value;
|
|
|
4293
|
|
826
|
4294 map_extents (start, end, slow_map_extents_function,
|
|
|
4295 (void *) &closure, object, after,
|
|
|
4296 /* You never know what the user might do ... */
|
|
|
4297 me_flags | ME_MIGHT_CALL_ELISP);
|
|
428
|
4298
|
|
|
4299 UNGCPRO;
|
|
|
4300 return closure.result;
|
|
|
4301 }
|
|
|
4302
|
|
|
4303
|
|
|
4304 /************************************************************************/
|
|
|
4305 /* mapping over extents -- other functions */
|
|
|
4306 /************************************************************************/
|
|
|
4307
|
|
|
4308 /* ------------------------------- */
|
|
|
4309 /* map-extent-children */
|
|
|
4310 /* ------------------------------- */
|
|
|
4311
|
|
|
4312 struct slow_map_extent_children_arg
|
|
|
4313 {
|
|
|
4314 Lisp_Object map_arg;
|
|
|
4315 Lisp_Object map_routine;
|
|
|
4316 Lisp_Object result;
|
|
|
4317 Lisp_Object property;
|
|
|
4318 Lisp_Object value;
|
|
826
|
4319 Bytexpos start_min;
|
|
|
4320 Bytexpos prev_start;
|
|
|
4321 Bytexpos prev_end;
|
|
428
|
4322 };
|
|
|
4323
|
|
|
4324 static int
|
|
|
4325 slow_map_extent_children_function (EXTENT extent, void *arg)
|
|
|
4326 {
|
|
|
4327 /* This function can GC */
|
|
|
4328 struct slow_map_extent_children_arg *closure =
|
|
|
4329 (struct slow_map_extent_children_arg *) arg;
|
|
|
4330 Lisp_Object extent_obj;
|
|
826
|
4331 Bytexpos start = extent_endpoint_byte (extent, 0);
|
|
|
4332 Bytexpos end = extent_endpoint_byte (extent, 1);
|
|
428
|
4333 /* Make sure the extent starts inside the region of interest,
|
|
|
4334 rather than just overlaps it.
|
|
|
4335 */
|
|
|
4336 if (start < closure->start_min)
|
|
|
4337 return 0;
|
|
|
4338 /* Make sure the extent is not a child of a previous visited one.
|
|
|
4339 We know already, because of extent ordering,
|
|
|
4340 that start >= prev_start, and that if
|
|
|
4341 start == prev_start, then end <= prev_end.
|
|
|
4342 */
|
|
|
4343 if (start == closure->prev_start)
|
|
|
4344 {
|
|
|
4345 if (end < closure->prev_end)
|
|
|
4346 return 0;
|
|
|
4347 }
|
|
|
4348 else /* start > prev_start */
|
|
|
4349 {
|
|
|
4350 if (start < closure->prev_end)
|
|
|
4351 return 0;
|
|
|
4352 /* corner case: prev_end can be -1 if there is no prev */
|
|
|
4353 }
|
|
793
|
4354 extent_obj = wrap_extent (extent);
|
|
428
|
4355
|
|
|
4356 /* make sure this extent qualifies according to the PROPERTY
|
|
|
4357 and VALUE args */
|
|
|
4358
|
|
|
4359 if (!NILP (closure->property))
|
|
|
4360 {
|
|
|
4361 Lisp_Object value = Fextent_property (extent_obj, closure->property,
|
|
|
4362 Qnil);
|
|
|
4363 if ((NILP (closure->value) && NILP (value)) ||
|
|
|
4364 (!NILP (closure->value) && !EQ (value, closure->value)))
|
|
|
4365 return 0;
|
|
|
4366 }
|
|
|
4367
|
|
|
4368 closure->result = call2 (closure->map_routine, extent_obj,
|
|
|
4369 closure->map_arg);
|
|
|
4370
|
|
|
4371 /* Since the callback may change the buffer, compute all stored
|
|
|
4372 buffer positions here.
|
|
|
4373 */
|
|
|
4374 closure->start_min = -1; /* no need for this any more */
|
|
826
|
4375 closure->prev_start = extent_endpoint_byte (extent, 0);
|
|
|
4376 closure->prev_end = extent_endpoint_byte (extent, 1);
|
|
428
|
4377
|
|
|
4378 return !NILP (closure->result);
|
|
|
4379 }
|
|
|
4380
|
|
|
4381 DEFUN ("map-extent-children", Fmap_extent_children, 1, 8, 0, /*
|
|
|
4382 Map FUNCTION over the extents in the region from FROM to TO.
|
|
|
4383 FUNCTION is called with arguments (extent, MAPARG). See `map-extents'
|
|
|
4384 for a full discussion of the arguments FROM, TO, and FLAGS.
|
|
|
4385
|
|
|
4386 The arguments are the same as for `map-extents', but this function differs
|
|
|
4387 in that it only visits extents which start in the given region, and also
|
|
|
4388 in that, after visiting an extent E, it skips all other extents which start
|
|
|
4389 inside E but end before E's end.
|
|
|
4390
|
|
|
4391 Thus, this function may be used to walk a tree of extents in a buffer:
|
|
|
4392 (defun walk-extents (buffer &optional ignore)
|
|
|
4393 (map-extent-children 'walk-extents buffer))
|
|
|
4394 */
|
|
|
4395 (function, object, from, to, maparg, flags, property, value))
|
|
|
4396 {
|
|
|
4397 /* This function can GC */
|
|
|
4398 struct slow_map_extent_children_arg closure;
|
|
|
4399 unsigned int me_flags;
|
|
826
|
4400 Bytexpos start, end;
|
|
428
|
4401 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4402 EXTENT after = 0;
|
|
|
4403
|
|
|
4404 if (EXTENTP (object))
|
|
|
4405 {
|
|
|
4406 after = decode_extent (object, DE_MUST_BE_ATTACHED);
|
|
|
4407 if (NILP (from))
|
|
|
4408 from = Fextent_start_position (object);
|
|
|
4409 if (NILP (to))
|
|
|
4410 to = Fextent_end_position (object);
|
|
|
4411 object = extent_object (after);
|
|
|
4412 }
|
|
|
4413 else
|
|
|
4414 object = decode_buffer_or_string (object);
|
|
|
4415
|
|
|
4416 get_buffer_or_string_range_byte (object, from, to, &start, &end,
|
|
|
4417 GB_ALLOW_NIL | GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
4418
|
|
|
4419 me_flags = decode_map_extents_flags (flags);
|
|
|
4420
|
|
|
4421 if (!NILP (property))
|
|
|
4422 {
|
|
|
4423 if (!NILP (value))
|
|
|
4424 value = canonicalize_extent_property (property, value);
|
|
|
4425 }
|
|
|
4426
|
|
|
4427 GCPRO5 (function, maparg, object, property, value);
|
|
|
4428
|
|
|
4429 closure.map_arg = maparg;
|
|
|
4430 closure.map_routine = function;
|
|
|
4431 closure.result = Qnil;
|
|
|
4432 closure.property = property;
|
|
|
4433 closure.value = value;
|
|
|
4434 closure.start_min = start;
|
|
|
4435 closure.prev_start = -1;
|
|
|
4436 closure.prev_end = -1;
|
|
826
|
4437 map_extents (start, end, slow_map_extent_children_function,
|
|
|
4438 (void *) &closure, object, after,
|
|
|
4439 /* You never know what the user might do ... */
|
|
|
4440 me_flags | ME_MIGHT_CALL_ELISP);
|
|
428
|
4441
|
|
|
4442 UNGCPRO;
|
|
|
4443 return closure.result;
|
|
|
4444 }
|
|
|
4445
|
|
|
4446 /* ------------------------------- */
|
|
|
4447 /* extent-at */
|
|
|
4448 /* ------------------------------- */
|
|
|
4449
|
|
|
4450 /* find "smallest" matching extent containing pos -- (flag == 0) means
|
|
|
4451 all extents match, else (EXTENT_FLAGS (extent) & flag) must be true;
|
|
|
4452 for more than one matching extent with precisely the same endpoints,
|
|
|
4453 we choose the last extent in the extents_list.
|
|
|
4454 The search stops just before "before", if that is non-null.
|
|
|
4455 */
|
|
|
4456
|
|
|
4457 struct extent_at_arg
|
|
|
4458 {
|
|
442
|
4459 Lisp_Object best_match; /* or list of extents */
|
|
826
|
4460 Memxpos best_start;
|
|
|
4461 Memxpos best_end;
|
|
428
|
4462 Lisp_Object prop;
|
|
|
4463 EXTENT before;
|
|
442
|
4464 int all_extents;
|
|
428
|
4465 };
|
|
|
4466
|
|
|
4467 static enum extent_at_flag
|
|
|
4468 decode_extent_at_flag (Lisp_Object at_flag)
|
|
|
4469 {
|
|
|
4470 if (NILP (at_flag))
|
|
|
4471 return EXTENT_AT_AFTER;
|
|
|
4472
|
|
|
4473 CHECK_SYMBOL (at_flag);
|
|
|
4474 if (EQ (at_flag, Qafter)) return EXTENT_AT_AFTER;
|
|
|
4475 if (EQ (at_flag, Qbefore)) return EXTENT_AT_BEFORE;
|
|
|
4476 if (EQ (at_flag, Qat)) return EXTENT_AT_AT;
|
|
|
4477
|
|
563
|
4478 invalid_constant ("Invalid AT-FLAG in `extent-at'", at_flag);
|
|
1204
|
4479 RETURN_NOT_REACHED (EXTENT_AT_AFTER);
|
|
428
|
4480 }
|
|
|
4481
|
|
|
4482 static int
|
|
|
4483 extent_at_mapper (EXTENT e, void *arg)
|
|
|
4484 {
|
|
|
4485 struct extent_at_arg *closure = (struct extent_at_arg *) arg;
|
|
|
4486
|
|
|
4487 if (e == closure->before)
|
|
|
4488 return 1;
|
|
|
4489
|
|
|
4490 /* If closure->prop is non-nil, then the extent is only acceptable
|
|
|
4491 if it has a non-nil value for that property. */
|
|
|
4492 if (!NILP (closure->prop))
|
|
|
4493 {
|
|
793
|
4494 Lisp_Object extent = wrap_extent (e);
|
|
|
4495
|
|
428
|
4496 if (NILP (Fextent_property (extent, closure->prop, Qnil)))
|
|
|
4497 return 0;
|
|
|
4498 }
|
|
|
4499
|
|
442
|
4500 if (!closure->all_extents)
|
|
428
|
4501 {
|
|
442
|
4502 EXTENT current;
|
|
|
4503
|
|
|
4504 if (NILP (closure->best_match))
|
|
428
|
4505 goto accept;
|
|
442
|
4506 current = XEXTENT (closure->best_match);
|
|
428
|
4507 /* redundant but quick test */
|
|
442
|
4508 if (extent_start (current) > extent_start (e))
|
|
428
|
4509 return 0;
|
|
|
4510
|
|
|
4511 /* we return the "last" best fit, instead of the first --
|
|
|
4512 this is because then the glyph closest to two equivalent
|
|
|
4513 extents corresponds to the "extent-at" the text just past
|
|
|
4514 that same glyph */
|
|
|
4515 else if (!EXTENT_LESS_VALS (e, closure->best_start,
|
|
|
4516 closure->best_end))
|
|
|
4517 goto accept;
|
|
|
4518 else
|
|
|
4519 return 0;
|
|
|
4520 accept:
|
|
793
|
4521 closure->best_match = wrap_extent (e);
|
|
428
|
4522 closure->best_start = extent_start (e);
|
|
|
4523 closure->best_end = extent_end (e);
|
|
|
4524 }
|
|
442
|
4525 else
|
|
|
4526 {
|
|
793
|
4527 Lisp_Object extent = wrap_extent (e);
|
|
|
4528
|
|
442
|
4529 closure->best_match = Fcons (extent, closure->best_match);
|
|
|
4530 }
|
|
428
|
4531
|
|
|
4532 return 0;
|
|
|
4533 }
|
|
|
4534
|
|
826
|
4535 Lisp_Object
|
|
|
4536 extent_at (Bytexpos position, Lisp_Object object,
|
|
|
4537 Lisp_Object property, EXTENT before,
|
|
|
4538 enum extent_at_flag at_flag, int all_extents)
|
|
428
|
4539 {
|
|
|
4540 struct extent_at_arg closure;
|
|
442
|
4541 struct gcpro gcpro1;
|
|
428
|
4542
|
|
|
4543 /* it might be argued that invalid positions should cause
|
|
|
4544 errors, but the principle of least surprise dictates that
|
|
|
4545 nil should be returned (extent-at is often used in
|
|
|
4546 response to a mouse event, and in many cases previous events
|
|
|
4547 have changed the buffer contents).
|
|
|
4548
|
|
|
4549 Also, the openness stuff in the text-property code currently
|
|
|
4550 does not check its limits and might go off the end. */
|
|
|
4551 if ((at_flag == EXTENT_AT_BEFORE
|
|
|
4552 ? position <= buffer_or_string_absolute_begin_byte (object)
|
|
|
4553 : position < buffer_or_string_absolute_begin_byte (object))
|
|
|
4554 || (at_flag == EXTENT_AT_AFTER
|
|
|
4555 ? position >= buffer_or_string_absolute_end_byte (object)
|
|
|
4556 : position > buffer_or_string_absolute_end_byte (object)))
|
|
|
4557 return Qnil;
|
|
|
4558
|
|
442
|
4559 closure.best_match = Qnil;
|
|
428
|
4560 closure.prop = property;
|
|
|
4561 closure.before = before;
|
|
442
|
4562 closure.all_extents = all_extents;
|
|
|
4563
|
|
|
4564 GCPRO1 (closure.best_match);
|
|
826
|
4565 map_extents (at_flag == EXTENT_AT_BEFORE ? prev_bytexpos (object, position) :
|
|
|
4566 position,
|
|
|
4567 at_flag == EXTENT_AT_AFTER ? next_bytexpos (object, position) :
|
|
|
4568 position,
|
|
|
4569 extent_at_mapper, (void *) &closure, object, 0,
|
|
|
4570 ME_START_OPEN | ME_ALL_EXTENTS_CLOSED);
|
|
442
|
4571 if (all_extents)
|
|
|
4572 closure.best_match = Fnreverse (closure.best_match);
|
|
|
4573 UNGCPRO;
|
|
|
4574
|
|
|
4575 return closure.best_match;
|
|
428
|
4576 }
|
|
|
4577
|
|
|
4578 DEFUN ("extent-at", Fextent_at, 1, 5, 0, /*
|
|
|
4579 Find "smallest" extent at POS in OBJECT having PROPERTY set.
|
|
|
4580 Normally, an extent is "at" POS if it overlaps the region (POS, POS+1);
|
|
|
4581 i.e. if it covers the character after POS. (However, see the definition
|
|
|
4582 of AT-FLAG.) "Smallest" means the extent that comes last in the display
|
|
|
4583 order; this normally means the extent whose start position is closest to
|
|
|
4584 POS. See `next-extent' for more information.
|
|
|
4585 OBJECT specifies a buffer or string and defaults to the current buffer.
|
|
|
4586 PROPERTY defaults to nil, meaning that any extent will do.
|
|
|
4587 Properties are attached to extents with `set-extent-property', which see.
|
|
|
4588 Returns nil if POS is invalid or there is no matching extent at POS.
|
|
|
4589 If the fourth argument BEFORE is not nil, it must be an extent; any returned
|
|
|
4590 extent will precede that extent. This feature allows `extent-at' to be
|
|
|
4591 used by a loop over extents.
|
|
|
4592 AT-FLAG controls how end cases are handled, and should be one of:
|
|
|
4593
|
|
|
4594 nil or `after' An extent is at POS if it covers the character
|
|
|
4595 after POS. This is consistent with the way
|
|
|
4596 that text properties work.
|
|
|
4597 `before' An extent is at POS if it covers the character
|
|
|
4598 before POS.
|
|
|
4599 `at' An extent is at POS if it overlaps or abuts POS.
|
|
|
4600 This includes all zero-length extents at POS.
|
|
|
4601
|
|
|
4602 Note that in all cases, the start-openness and end-openness of the extents
|
|
|
4603 considered is ignored. If you want to pay attention to those properties,
|
|
|
4604 you should use `map-extents', which gives you more control.
|
|
|
4605 */
|
|
|
4606 (pos, object, property, before, at_flag))
|
|
|
4607 {
|
|
826
|
4608 Bytexpos position;
|
|
428
|
4609 EXTENT before_extent;
|
|
|
4610 enum extent_at_flag fl;
|
|
|
4611
|
|
|
4612 object = decode_buffer_or_string (object);
|
|
|
4613 position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD);
|
|
|
4614 if (NILP (before))
|
|
|
4615 before_extent = 0;
|
|
|
4616 else
|
|
|
4617 before_extent = decode_extent (before, DE_MUST_BE_ATTACHED);
|
|
|
4618 if (before_extent && !EQ (object, extent_object (before_extent)))
|
|
442
|
4619 invalid_argument ("extent not in specified buffer or string", object);
|
|
428
|
4620 fl = decode_extent_at_flag (at_flag);
|
|
|
4621
|
|
826
|
4622 return extent_at (position, object, property, before_extent, fl, 0);
|
|
442
|
4623 }
|
|
|
4624
|
|
|
4625 DEFUN ("extents-at", Fextents_at, 1, 5, 0, /*
|
|
|
4626 Find all extents at POS in OBJECT having PROPERTY set.
|
|
|
4627 Normally, an extent is "at" POS if it overlaps the region (POS, POS+1);
|
|
|
4628 i.e. if it covers the character after POS. (However, see the definition
|
|
|
4629 of AT-FLAG.)
|
|
|
4630 This provides similar functionality to `extent-list', but does so in a way
|
|
|
4631 that is compatible with `extent-at'. (For example, errors due to POS out of
|
|
|
4632 range are ignored; this makes it safer to use this function in response to
|
|
|
4633 a mouse event, because in many cases previous events have changed the buffer
|
|
|
4634 contents.)
|
|
|
4635 OBJECT specifies a buffer or string and defaults to the current buffer.
|
|
|
4636 PROPERTY defaults to nil, meaning that any extent will do.
|
|
|
4637 Properties are attached to extents with `set-extent-property', which see.
|
|
|
4638 Returns nil if POS is invalid or there is no matching extent at POS.
|
|
|
4639 If the fourth argument BEFORE is not nil, it must be an extent; any returned
|
|
|
4640 extent will precede that extent. This feature allows `extents-at' to be
|
|
|
4641 used by a loop over extents.
|
|
|
4642 AT-FLAG controls how end cases are handled, and should be one of:
|
|
|
4643
|
|
|
4644 nil or `after' An extent is at POS if it covers the character
|
|
|
4645 after POS. This is consistent with the way
|
|
|
4646 that text properties work.
|
|
|
4647 `before' An extent is at POS if it covers the character
|
|
|
4648 before POS.
|
|
|
4649 `at' An extent is at POS if it overlaps or abuts POS.
|
|
|
4650 This includes all zero-length extents at POS.
|
|
|
4651
|
|
|
4652 Note that in all cases, the start-openness and end-openness of the extents
|
|
|
4653 considered is ignored. If you want to pay attention to those properties,
|
|
|
4654 you should use `map-extents', which gives you more control.
|
|
|
4655 */
|
|
|
4656 (pos, object, property, before, at_flag))
|
|
|
4657 {
|
|
826
|
4658 Bytexpos position;
|
|
442
|
4659 EXTENT before_extent;
|
|
|
4660 enum extent_at_flag fl;
|
|
|
4661
|
|
|
4662 object = decode_buffer_or_string (object);
|
|
|
4663 position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD);
|
|
|
4664 if (NILP (before))
|
|
|
4665 before_extent = 0;
|
|
|
4666 else
|
|
|
4667 before_extent = decode_extent (before, DE_MUST_BE_ATTACHED);
|
|
|
4668 if (before_extent && !EQ (object, extent_object (before_extent)))
|
|
|
4669 invalid_argument ("extent not in specified buffer or string", object);
|
|
|
4670 fl = decode_extent_at_flag (at_flag);
|
|
|
4671
|
|
826
|
4672 return extent_at (position, object, property, before_extent, fl, 1);
|
|
428
|
4673 }
|
|
|
4674
|
|
|
4675 /* ------------------------------- */
|
|
|
4676 /* verify_extent_modification() */
|
|
|
4677 /* ------------------------------- */
|
|
|
4678
|
|
|
4679 /* verify_extent_modification() is called when a buffer or string is
|
|
|
4680 modified to check whether the modification is occuring inside a
|
|
|
4681 read-only extent.
|
|
|
4682 */
|
|
|
4683
|
|
|
4684 struct verify_extents_arg
|
|
|
4685 {
|
|
|
4686 Lisp_Object object;
|
|
826
|
4687 Memxpos start;
|
|
|
4688 Memxpos end;
|
|
428
|
4689 Lisp_Object iro; /* value of inhibit-read-only */
|
|
|
4690 };
|
|
|
4691
|
|
|
4692 static int
|
|
|
4693 verify_extent_mapper (EXTENT extent, void *arg)
|
|
|
4694 {
|
|
|
4695 struct verify_extents_arg *closure = (struct verify_extents_arg *) arg;
|
|
|
4696 Lisp_Object prop = extent_read_only (extent);
|
|
|
4697
|
|
|
4698 if (NILP (prop))
|
|
|
4699 return 0;
|
|
|
4700
|
|
|
4701 if (CONSP (closure->iro) && !NILP (Fmemq (prop, closure->iro)))
|
|
|
4702 return 0;
|
|
|
4703
|
|
|
4704 #if 0 /* Nobody seems to care for this any more -sb */
|
|
|
4705 /* Allow deletion if the extent is completely contained in
|
|
|
4706 the region being deleted.
|
|
|
4707 This is important for supporting tokens which are internally
|
|
|
4708 write-protected, but which can be killed and yanked as a whole.
|
|
|
4709 Ignore open/closed distinctions at this point.
|
|
|
4710 -- Rose
|
|
|
4711 */
|
|
|
4712 if (closure->start != closure->end &&
|
|
|
4713 extent_start (extent) >= closure->start &&
|
|
|
4714 extent_end (extent) <= closure->end)
|
|
|
4715 return 0;
|
|
|
4716 #endif
|
|
|
4717
|
|
|
4718 while (1)
|
|
|
4719 Fsignal (Qbuffer_read_only, (list1 (closure->object)));
|
|
|
4720
|
|
1204
|
4721 RETURN_NOT_REACHED(0);
|
|
428
|
4722 }
|
|
|
4723
|
|
|
4724 /* Value of Vinhibit_read_only is precomputed and passed in for
|
|
|
4725 efficiency */
|
|
|
4726
|
|
|
4727 void
|
|
826
|
4728 verify_extent_modification (Lisp_Object object, Bytexpos from, Bytexpos to,
|
|
428
|
4729 Lisp_Object inhibit_read_only_value)
|
|
|
4730 {
|
|
|
4731 int closed;
|
|
|
4732 struct verify_extents_arg closure;
|
|
|
4733
|
|
|
4734 /* If insertion, visit closed-endpoint extents touching the insertion
|
|
|
4735 point because the text would go inside those extents. If deletion,
|
|
|
4736 treat the range as open on both ends so that touching extents are not
|
|
|
4737 visited. Note that we assume that an insertion is occurring if the
|
|
|
4738 changed range has zero length, and a deletion otherwise. This
|
|
|
4739 fails if a change (i.e. non-insertion, non-deletion) is happening.
|
|
|
4740 As far as I know, this doesn't currently occur in XEmacs. --ben */
|
|
|
4741 closed = (from==to);
|
|
|
4742 closure.object = object;
|
|
826
|
4743 closure.start = buffer_or_string_bytexpos_to_memxpos (object, from);
|
|
|
4744 closure.end = buffer_or_string_bytexpos_to_memxpos (object, to);
|
|
428
|
4745 closure.iro = inhibit_read_only_value;
|
|
|
4746
|
|
826
|
4747 map_extents (from, to, verify_extent_mapper, (void *) &closure,
|
|
|
4748 object, 0, closed ? ME_END_CLOSED : ME_START_OPEN);
|
|
428
|
4749 }
|
|
|
4750
|
|
|
4751 /* ------------------------------------ */
|
|
|
4752 /* process_extents_for_insertion() */
|
|
|
4753 /* ------------------------------------ */
|
|
|
4754
|
|
|
4755 struct process_extents_for_insertion_arg
|
|
|
4756 {
|
|
826
|
4757 Bytexpos opoint;
|
|
428
|
4758 int length;
|
|
|
4759 Lisp_Object object;
|
|
|
4760 };
|
|
|
4761
|
|
|
4762 /* A region of length LENGTH was just inserted at OPOINT. Modify all
|
|
|
4763 of the extents as required for the insertion, based on their
|
|
|
4764 start-open/end-open properties.
|
|
|
4765 */
|
|
|
4766
|
|
|
4767 static int
|
|
|
4768 process_extents_for_insertion_mapper (EXTENT extent, void *arg)
|
|
|
4769 {
|
|
|
4770 struct process_extents_for_insertion_arg *closure =
|
|
|
4771 (struct process_extents_for_insertion_arg *) arg;
|
|
826
|
4772 Memxpos indice = buffer_or_string_bytexpos_to_memxpos (closure->object,
|
|
|
4773 closure->opoint);
|
|
428
|
4774
|
|
|
4775 /* When this function is called, one end of the newly-inserted text should
|
|
|
4776 be adjacent to some endpoint of the extent, or disjoint from it. If
|
|
|
4777 the insertion overlaps any existing extent, something is wrong.
|
|
|
4778 */
|
|
|
4779 #ifdef ERROR_CHECK_EXTENTS
|
|
|
4780 if (extent_start (extent) > indice &&
|
|
|
4781 extent_start (extent) < indice + closure->length)
|
|
|
4782 abort ();
|
|
|
4783 if (extent_end (extent) > indice &&
|
|
|
4784 extent_end (extent) < indice + closure->length)
|
|
|
4785 abort ();
|
|
|
4786 #endif
|
|
|
4787
|
|
|
4788 /* The extent-adjustment code adjusted the extent's endpoints as if
|
|
468
|
4789 all extents were closed-open -- endpoints at the insertion point
|
|
|
4790 remain unchanged. We need to fix the other kinds of extents:
|
|
|
4791
|
|
|
4792 1. Start position of start-open extents needs to be moved.
|
|
|
4793
|
|
|
4794 2. End position of end-closed extents needs to be moved.
|
|
|
4795
|
|
|
4796 Note that both conditions hold for zero-length (] extents at the
|
|
|
4797 insertion point. But under these rules, zero-length () extents
|
|
|
4798 would get adjusted such that their start is greater than their
|
|
|
4799 end; instead of allowing that, we treat them as [) extents by
|
|
|
4800 modifying condition #1 to not fire nothing when dealing with a
|
|
|
4801 zero-length open-open extent.
|
|
|
4802
|
|
|
4803 Existence of zero-length open-open extents is unfortunately an
|
|
|
4804 inelegant part of the extent model, but there is no way around
|
|
|
4805 it. */
|
|
428
|
4806
|
|
|
4807 {
|
|
826
|
4808 Memxpos new_start = extent_start (extent);
|
|
|
4809 Memxpos new_end = extent_end (extent);
|
|
468
|
4810
|
|
|
4811 if (indice == extent_start (extent) && extent_start_open_p (extent)
|
|
|
4812 /* zero-length () extents are exempt; see comment above. */
|
|
|
4813 && !(new_start == new_end && extent_end_open_p (extent))
|
|
|
4814 )
|
|
428
|
4815 new_start += closure->length;
|
|
|
4816 if (indice == extent_end (extent) && !extent_end_open_p (extent))
|
|
|
4817 new_end += closure->length;
|
|
468
|
4818
|
|
428
|
4819 set_extent_endpoints_1 (extent, new_start, new_end);
|
|
|
4820 }
|
|
|
4821
|
|
|
4822 return 0;
|
|
|
4823 }
|
|
|
4824
|
|
|
4825 void
|
|
826
|
4826 process_extents_for_insertion (Lisp_Object object, Bytexpos opoint,
|
|
428
|
4827 Bytecount length)
|
|
|
4828 {
|
|
|
4829 struct process_extents_for_insertion_arg closure;
|
|
|
4830
|
|
|
4831 closure.opoint = opoint;
|
|
|
4832 closure.length = length;
|
|
|
4833 closure.object = object;
|
|
|
4834
|
|
826
|
4835 map_extents (opoint, opoint + length,
|
|
|
4836 process_extents_for_insertion_mapper,
|
|
|
4837 (void *) &closure, object, 0,
|
|
|
4838 ME_END_CLOSED | ME_MIGHT_MODIFY_EXTENTS |
|
|
|
4839 ME_INCLUDE_INTERNAL);
|
|
428
|
4840 }
|
|
|
4841
|
|
|
4842 /* ------------------------------------ */
|
|
|
4843 /* process_extents_for_deletion() */
|
|
|
4844 /* ------------------------------------ */
|
|
|
4845
|
|
|
4846 struct process_extents_for_deletion_arg
|
|
|
4847 {
|
|
826
|
4848 Memxpos start, end;
|
|
428
|
4849 int destroy_included_extents;
|
|
|
4850 };
|
|
|
4851
|
|
|
4852 /* This function is called when we're about to delete the range [from, to].
|
|
|
4853 Detach all of the extents that are completely inside the range [from, to],
|
|
|
4854 if they're detachable or open-open. */
|
|
|
4855
|
|
|
4856 static int
|
|
|
4857 process_extents_for_deletion_mapper (EXTENT extent, void *arg)
|
|
|
4858 {
|
|
|
4859 struct process_extents_for_deletion_arg *closure =
|
|
|
4860 (struct process_extents_for_deletion_arg *) arg;
|
|
|
4861
|
|
|
4862 /* If the extent lies completely within the range that
|
|
|
4863 is being deleted, then nuke the extent if it's detachable
|
|
|
4864 (otherwise, it will become a zero-length extent). */
|
|
|
4865
|
|
|
4866 if (closure->start <= extent_start (extent) &&
|
|
|
4867 extent_end (extent) <= closure->end)
|
|
|
4868 {
|
|
|
4869 if (extent_detachable_p (extent))
|
|
|
4870 {
|
|
|
4871 if (closure->destroy_included_extents)
|
|
|
4872 destroy_extent (extent);
|
|
|
4873 else
|
|
|
4874 extent_detach (extent);
|
|
|
4875 }
|
|
|
4876 }
|
|
|
4877
|
|
|
4878 return 0;
|
|
|
4879 }
|
|
|
4880
|
|
|
4881 /* DESTROY_THEM means destroy the extents instead of just deleting them.
|
|
|
4882 It is unused currently, but perhaps might be used (there used to
|
|
|
4883 be a function process_extents_for_destruction(), #if 0'd out,
|
|
|
4884 that did the equivalent). */
|
|
|
4885 void
|
|
826
|
4886 process_extents_for_deletion (Lisp_Object object, Bytexpos from,
|
|
|
4887 Bytexpos to, int destroy_them)
|
|
428
|
4888 {
|
|
|
4889 struct process_extents_for_deletion_arg closure;
|
|
|
4890
|
|
826
|
4891 closure.start = buffer_or_string_bytexpos_to_memxpos (object, from);
|
|
|
4892 closure.end = buffer_or_string_bytexpos_to_memxpos (object, to);
|
|
428
|
4893 closure.destroy_included_extents = destroy_them;
|
|
|
4894
|
|
826
|
4895 map_extents (from, to, process_extents_for_deletion_mapper,
|
|
|
4896 (void *) &closure, object, 0,
|
|
|
4897 ME_END_CLOSED | ME_MIGHT_MODIFY_EXTENTS);
|
|
428
|
4898 }
|
|
|
4899
|
|
|
4900 /* ------------------------------- */
|
|
|
4901 /* report_extent_modification() */
|
|
|
4902 /* ------------------------------- */
|
|
826
|
4903
|
|
|
4904 struct report_extent_modification_closure
|
|
|
4905 {
|
|
428
|
4906 Lisp_Object buffer;
|
|
826
|
4907 Charxpos start, end;
|
|
428
|
4908 int afterp;
|
|
|
4909 int speccount;
|
|
|
4910 };
|
|
|
4911
|
|
|
4912 static Lisp_Object
|
|
|
4913 report_extent_modification_restore (Lisp_Object buffer)
|
|
|
4914 {
|
|
|
4915 if (current_buffer != XBUFFER (buffer))
|
|
|
4916 Fset_buffer (buffer);
|
|
|
4917 return Qnil;
|
|
|
4918 }
|
|
|
4919
|
|
|
4920 static int
|
|
|
4921 report_extent_modification_mapper (EXTENT extent, void *arg)
|
|
|
4922 {
|
|
|
4923 struct report_extent_modification_closure *closure =
|
|
|
4924 (struct report_extent_modification_closure *)arg;
|
|
|
4925 Lisp_Object exobj, startobj, endobj;
|
|
|
4926 Lisp_Object hook = (closure->afterp
|
|
|
4927 ? extent_after_change_functions (extent)
|
|
|
4928 : extent_before_change_functions (extent));
|
|
|
4929 if (NILP (hook))
|
|
|
4930 return 0;
|
|
|
4931
|
|
793
|
4932 exobj = wrap_extent (extent);
|
|
|
4933 startobj = make_int (closure->start);
|
|
|
4934 endobj = make_int (closure->end);
|
|
428
|
4935
|
|
|
4936 /* Now that we are sure to call elisp, set up an unwind-protect so
|
|
|
4937 inside_change_hook gets restored in case we throw. Also record
|
|
|
4938 the current buffer, in case we change it. Do the recording only
|
|
438
|
4939 once.
|
|
|
4940
|
|
|
4941 One confusing thing here is that our caller never actually calls
|
|
771
|
4942 unbind_to (closure.speccount). This is because
|
|
826
|
4943 map_extents() unbinds before, and with a smaller
|
|
771
|
4944 speccount. The additional unbind_to_1() in
|
|
438
|
4945 report_extent_modification() would cause XEmacs to abort. */
|
|
428
|
4946 if (closure->speccount == -1)
|
|
|
4947 {
|
|
|
4948 closure->speccount = specpdl_depth ();
|
|
|
4949 record_unwind_protect (report_extent_modification_restore,
|
|
|
4950 Fcurrent_buffer ());
|
|
|
4951 }
|
|
|
4952
|
|
|
4953 /* The functions will expect closure->buffer to be the current
|
|
|
4954 buffer, so change it if it isn't. */
|
|
|
4955 if (current_buffer != XBUFFER (closure->buffer))
|
|
|
4956 Fset_buffer (closure->buffer);
|
|
|
4957
|
|
|
4958 /* #### It's a shame that we can't use any of the existing run_hook*
|
|
|
4959 functions here. This is so because all of them work with
|
|
|
4960 symbols, to be able to retrieve default values of local hooks.
|
|
438
|
4961 <sigh>
|
|
|
4962
|
|
|
4963 #### Idea: we could set up a dummy symbol, and call the hook
|
|
|
4964 functions on *that*. */
|
|
428
|
4965
|
|
|
4966 if (!CONSP (hook) || EQ (XCAR (hook), Qlambda))
|
|
|
4967 call3 (hook, exobj, startobj, endobj);
|
|
|
4968 else
|
|
|
4969 {
|
|
|
4970 Lisp_Object tail;
|
|
|
4971 EXTERNAL_LIST_LOOP (tail, hook)
|
|
438
|
4972 /* #### Shouldn't this perform the same Fset_buffer() check as
|
|
|
4973 above? */
|
|
428
|
4974 call3 (XCAR (tail), exobj, startobj, endobj);
|
|
|
4975 }
|
|
|
4976 return 0;
|
|
|
4977 }
|
|
|
4978
|
|
|
4979 void
|
|
665
|
4980 report_extent_modification (Lisp_Object buffer, Charbpos start, Charbpos end,
|
|
438
|
4981 int afterp)
|
|
428
|
4982 {
|
|
|
4983 struct report_extent_modification_closure closure;
|
|
|
4984
|
|
|
4985 closure.buffer = buffer;
|
|
|
4986 closure.start = start;
|
|
|
4987 closure.end = end;
|
|
|
4988 closure.afterp = afterp;
|
|
|
4989 closure.speccount = -1;
|
|
|
4990
|
|
826
|
4991 map_extents (charbpos_to_bytebpos (XBUFFER (buffer), start),
|
|
|
4992 charbpos_to_bytebpos (XBUFFER (buffer), end),
|
|
|
4993 report_extent_modification_mapper, (void *)&closure,
|
|
428
|
4994 buffer, NULL, ME_MIGHT_CALL_ELISP);
|
|
|
4995 }
|
|
|
4996
|
|
|
4997
|
|
|
4998 /************************************************************************/
|
|
|
4999 /* extent properties */
|
|
|
5000 /************************************************************************/
|
|
|
5001
|
|
|
5002 static void
|
|
|
5003 set_extent_invisible (EXTENT extent, Lisp_Object value)
|
|
|
5004 {
|
|
|
5005 if (!EQ (extent_invisible (extent), value))
|
|
|
5006 {
|
|
|
5007 set_extent_invisible_1 (extent, value);
|
|
826
|
5008 signal_extent_property_changed (extent, Qinvisible, 1);
|
|
428
|
5009 }
|
|
|
5010 }
|
|
|
5011
|
|
|
5012 /* This function does "memoization" -- similar to the interning
|
|
|
5013 that happens with symbols. Given a list of faces, an equivalent
|
|
|
5014 list is returned such that if this function is called twice with
|
|
|
5015 input that is `equal', the resulting outputs will be `eq'.
|
|
|
5016
|
|
|
5017 Note that the inputs and outputs are in general *not* `equal' --
|
|
|
5018 faces in symbol form become actual face objects in the output.
|
|
|
5019 This is necessary so that temporary faces stay around. */
|
|
|
5020
|
|
|
5021 static Lisp_Object
|
|
|
5022 memoize_extent_face_internal (Lisp_Object list)
|
|
|
5023 {
|
|
|
5024 int len;
|
|
|
5025 int thelen;
|
|
|
5026 Lisp_Object cons, thecons;
|
|
|
5027 Lisp_Object oldtail, tail;
|
|
|
5028 struct gcpro gcpro1;
|
|
|
5029
|
|
|
5030 if (NILP (list))
|
|
|
5031 return Qnil;
|
|
|
5032 if (!CONSP (list))
|
|
|
5033 return Fget_face (list);
|
|
|
5034
|
|
|
5035 /* To do the memoization, we use a hash table mapping from
|
|
|
5036 external lists to internal lists. We do `equal' comparisons
|
|
|
5037 on the keys so the memoization works correctly.
|
|
|
5038
|
|
|
5039 Note that we canonicalize things so that the keys in the
|
|
|
5040 hash table (the external lists) always contain symbols and
|
|
|
5041 the values (the internal lists) always contain face objects.
|
|
|
5042
|
|
|
5043 We also maintain a "reverse" table that maps from the internal
|
|
|
5044 lists to the external equivalents. The idea here is twofold:
|
|
|
5045
|
|
|
5046 1) `extent-face' wants to return a list containing face symbols
|
|
|
5047 rather than face objects.
|
|
|
5048 2) We don't want things to get quite so messed up if the user
|
|
|
5049 maliciously side-effects the returned lists.
|
|
|
5050 */
|
|
|
5051
|
|
|
5052 len = XINT (Flength (list));
|
|
|
5053 thelen = XINT (Flength (Vextent_face_reusable_list));
|
|
|
5054 oldtail = Qnil;
|
|
|
5055 tail = Qnil;
|
|
|
5056 GCPRO1 (oldtail);
|
|
|
5057
|
|
|
5058 /* We canonicalize the given list into another list.
|
|
|
5059 We try to avoid consing except when necessary, so we have
|
|
|
5060 a reusable list.
|
|
|
5061 */
|
|
|
5062
|
|
|
5063 if (thelen < len)
|
|
|
5064 {
|
|
|
5065 cons = Vextent_face_reusable_list;
|
|
|
5066 while (!NILP (XCDR (cons)))
|
|
|
5067 cons = XCDR (cons);
|
|
|
5068 XCDR (cons) = Fmake_list (make_int (len - thelen), Qnil);
|
|
|
5069 }
|
|
|
5070 else if (thelen > len)
|
|
|
5071 {
|
|
|
5072 int i;
|
|
|
5073
|
|
|
5074 /* Truncate the list temporarily so it's the right length;
|
|
|
5075 remember the old tail. */
|
|
|
5076 cons = Vextent_face_reusable_list;
|
|
|
5077 for (i = 0; i < len - 1; i++)
|
|
|
5078 cons = XCDR (cons);
|
|
|
5079 tail = cons;
|
|
|
5080 oldtail = XCDR (cons);
|
|
|
5081 XCDR (cons) = Qnil;
|
|
|
5082 }
|
|
|
5083
|
|
|
5084 thecons = Vextent_face_reusable_list;
|
|
|
5085 EXTERNAL_LIST_LOOP (cons, list)
|
|
|
5086 {
|
|
|
5087 Lisp_Object face = Fget_face (XCAR (cons));
|
|
|
5088
|
|
|
5089 XCAR (thecons) = Fface_name (face);
|
|
|
5090 thecons = XCDR (thecons);
|
|
|
5091 }
|
|
|
5092
|
|
|
5093 list = Fgethash (Vextent_face_reusable_list, Vextent_face_memoize_hash_table,
|
|
|
5094 Qnil);
|
|
|
5095 if (NILP (list))
|
|
|
5096 {
|
|
|
5097 Lisp_Object symlist = Fcopy_sequence (Vextent_face_reusable_list);
|
|
|
5098 Lisp_Object facelist = Fcopy_sequence (Vextent_face_reusable_list);
|
|
|
5099
|
|
|
5100 LIST_LOOP (cons, facelist)
|
|
|
5101 {
|
|
|
5102 XCAR (cons) = Fget_face (XCAR (cons));
|
|
|
5103 }
|
|
|
5104 Fputhash (symlist, facelist, Vextent_face_memoize_hash_table);
|
|
|
5105 Fputhash (facelist, symlist, Vextent_face_reverse_memoize_hash_table);
|
|
|
5106 list = facelist;
|
|
|
5107 }
|
|
|
5108
|
|
|
5109 /* Now restore the truncated tail of the reusable list, if necessary. */
|
|
|
5110 if (!NILP (tail))
|
|
|
5111 XCDR (tail) = oldtail;
|
|
|
5112
|
|
|
5113 UNGCPRO;
|
|
|
5114 return list;
|
|
|
5115 }
|
|
|
5116
|
|
|
5117 static Lisp_Object
|
|
|
5118 external_of_internal_memoized_face (Lisp_Object face)
|
|
|
5119 {
|
|
|
5120 if (NILP (face))
|
|
|
5121 return Qnil;
|
|
|
5122 else if (!CONSP (face))
|
|
|
5123 return XFACE (face)->name;
|
|
|
5124 else
|
|
|
5125 {
|
|
|
5126 face = Fgethash (face, Vextent_face_reverse_memoize_hash_table,
|
|
|
5127 Qunbound);
|
|
|
5128 assert (!UNBOUNDP (face));
|
|
|
5129 return face;
|
|
|
5130 }
|
|
|
5131 }
|
|
|
5132
|
|
826
|
5133 /* The idea here is that if we're given a list of faces, we
|
|
|
5134 need to "memoize" this so that two lists of faces that are `equal'
|
|
|
5135 turn into the same object. When `set-extent-face' is called, we
|
|
|
5136 "memoize" into a list of actual faces; when `extent-face' is called,
|
|
|
5137 we do a reverse lookup to get the list of symbols. */
|
|
|
5138
|
|
428
|
5139 static Lisp_Object
|
|
|
5140 canonicalize_extent_property (Lisp_Object prop, Lisp_Object value)
|
|
|
5141 {
|
|
|
5142 if (EQ (prop, Qface) || EQ (prop, Qmouse_face))
|
|
|
5143 value = (external_of_internal_memoized_face
|
|
|
5144 (memoize_extent_face_internal (value)));
|
|
|
5145 return value;
|
|
|
5146 }
|
|
|
5147
|
|
|
5148 /* Do we need a lisp-level function ? */
|
|
826
|
5149 DEFUN ("set-extent-initial-redisplay-function",
|
|
|
5150 Fset_extent_initial_redisplay_function,
|
|
444
|
5151 2,2,0, /*
|
|
428
|
5152 Note: This feature is experimental!
|
|
|
5153
|
|
|
5154 Set initial-redisplay-function of EXTENT to the function
|
|
|
5155 FUNCTION.
|
|
|
5156
|
|
|
5157 The first time the EXTENT is (re)displayed, an eval event will be
|
|
|
5158 dispatched calling FUNCTION with EXTENT as its only argument.
|
|
|
5159 */
|
|
|
5160 (extent, function))
|
|
|
5161 {
|
|
826
|
5162 /* #### This is totally broken. */
|
|
|
5163 EXTENT e = decode_extent (extent, DE_MUST_BE_ATTACHED);
|
|
428
|
5164
|
|
|
5165 e = extent_ancestor (e); /* Is this needed? Macro also does chasing!*/
|
|
826
|
5166 set_extent_initial_redisplay_function (e, function);
|
|
|
5167 extent_in_red_event_p (e) = 0; /* If the function changed we can spawn
|
|
428
|
5168 new events */
|
|
826
|
5169 signal_extent_property_changed (e, Qinitial_redisplay_function, 1);
|
|
428
|
5170 return function;
|
|
|
5171 }
|
|
|
5172
|
|
|
5173 DEFUN ("extent-face", Fextent_face, 1, 1, 0, /*
|
|
|
5174 Return the name of the face in which EXTENT is displayed, or nil
|
|
|
5175 if the extent's face is unspecified. This might also return a list
|
|
|
5176 of face names.
|
|
|
5177 */
|
|
|
5178 (extent))
|
|
|
5179 {
|
|
|
5180 Lisp_Object face;
|
|
|
5181
|
|
|
5182 CHECK_EXTENT (extent);
|
|
|
5183 face = extent_face (XEXTENT (extent));
|
|
|
5184
|
|
|
5185 return external_of_internal_memoized_face (face);
|
|
|
5186 }
|
|
|
5187
|
|
|
5188 DEFUN ("set-extent-face", Fset_extent_face, 2, 2, 0, /*
|
|
|
5189 Make the given EXTENT have the graphic attributes specified by FACE.
|
|
|
5190 FACE can also be a list of faces, and all faces listed will apply,
|
|
|
5191 with faces earlier in the list taking priority over those later in the
|
|
|
5192 list.
|
|
|
5193 */
|
|
|
5194 (extent, face))
|
|
|
5195 {
|
|
|
5196 EXTENT e = decode_extent(extent, 0);
|
|
|
5197 Lisp_Object orig_face = face;
|
|
|
5198
|
|
|
5199 /* retrieve the ancestor for efficiency and proper redisplay noting. */
|
|
|
5200 e = extent_ancestor (e);
|
|
|
5201
|
|
|
5202 face = memoize_extent_face_internal (face);
|
|
|
5203
|
|
|
5204 extent_face (e) = face;
|
|
826
|
5205 signal_extent_property_changed (e, Qface, 1);
|
|
428
|
5206
|
|
|
5207 return orig_face;
|
|
|
5208 }
|
|
|
5209
|
|
|
5210
|
|
|
5211 DEFUN ("extent-mouse-face", Fextent_mouse_face, 1, 1, 0, /*
|
|
|
5212 Return the face used to highlight EXTENT when the mouse passes over it.
|
|
|
5213 The return value will be a face name, a list of face names, or nil
|
|
|
5214 if the extent's mouse face is unspecified.
|
|
|
5215 */
|
|
|
5216 (extent))
|
|
|
5217 {
|
|
|
5218 Lisp_Object face;
|
|
|
5219
|
|
|
5220 CHECK_EXTENT (extent);
|
|
|
5221 face = extent_mouse_face (XEXTENT (extent));
|
|
|
5222
|
|
|
5223 return external_of_internal_memoized_face (face);
|
|
|
5224 }
|
|
|
5225
|
|
|
5226 DEFUN ("set-extent-mouse-face", Fset_extent_mouse_face, 2, 2, 0, /*
|
|
|
5227 Set the face used to highlight EXTENT when the mouse passes over it.
|
|
|
5228 FACE can also be a list of faces, and all faces listed will apply,
|
|
|
5229 with faces earlier in the list taking priority over those later in the
|
|
|
5230 list.
|
|
|
5231 */
|
|
|
5232 (extent, face))
|
|
|
5233 {
|
|
|
5234 EXTENT e;
|
|
|
5235 Lisp_Object orig_face = face;
|
|
|
5236
|
|
|
5237 CHECK_EXTENT (extent);
|
|
|
5238 e = XEXTENT (extent);
|
|
|
5239 /* retrieve the ancestor for efficiency and proper redisplay noting. */
|
|
|
5240 e = extent_ancestor (e);
|
|
|
5241
|
|
|
5242 face = memoize_extent_face_internal (face);
|
|
|
5243
|
|
|
5244 set_extent_mouse_face (e, face);
|
|
826
|
5245 signal_extent_property_changed (e, Qmouse_face, 1);
|
|
428
|
5246
|
|
|
5247 return orig_face;
|
|
|
5248 }
|
|
|
5249
|
|
|
5250 void
|
|
|
5251 set_extent_glyph (EXTENT extent, Lisp_Object glyph, int endp,
|
|
|
5252 glyph_layout layout)
|
|
|
5253 {
|
|
|
5254 extent = extent_ancestor (extent);
|
|
|
5255
|
|
|
5256 if (!endp)
|
|
|
5257 {
|
|
|
5258 set_extent_begin_glyph (extent, glyph);
|
|
647
|
5259 set_extent_begin_glyph_layout (extent, layout);
|
|
826
|
5260 signal_extent_property_changed (extent, Qbegin_glyph, 1);
|
|
|
5261 signal_extent_property_changed (extent, Qbegin_glyph_layout, 1);
|
|
428
|
5262 }
|
|
|
5263 else
|
|
|
5264 {
|
|
|
5265 set_extent_end_glyph (extent, glyph);
|
|
647
|
5266 set_extent_end_glyph_layout (extent, layout);
|
|
826
|
5267 signal_extent_property_changed (extent, Qend_glyph, 1);
|
|
|
5268 signal_extent_property_changed (extent, Qend_glyph_layout, 1);
|
|
428
|
5269 }
|
|
|
5270 }
|
|
|
5271
|
|
|
5272 static Lisp_Object
|
|
|
5273 glyph_layout_to_symbol (glyph_layout layout)
|
|
|
5274 {
|
|
|
5275 switch (layout)
|
|
|
5276 {
|
|
|
5277 case GL_TEXT: return Qtext;
|
|
|
5278 case GL_OUTSIDE_MARGIN: return Qoutside_margin;
|
|
|
5279 case GL_INSIDE_MARGIN: return Qinside_margin;
|
|
|
5280 case GL_WHITESPACE: return Qwhitespace;
|
|
|
5281 default:
|
|
|
5282 abort ();
|
|
|
5283 return Qnil; /* unreached */
|
|
|
5284 }
|
|
|
5285 }
|
|
|
5286
|
|
|
5287 static glyph_layout
|
|
|
5288 symbol_to_glyph_layout (Lisp_Object layout_obj)
|
|
|
5289 {
|
|
|
5290 if (NILP (layout_obj))
|
|
|
5291 return GL_TEXT;
|
|
|
5292
|
|
|
5293 CHECK_SYMBOL (layout_obj);
|
|
|
5294 if (EQ (layout_obj, Qoutside_margin)) return GL_OUTSIDE_MARGIN;
|
|
|
5295 if (EQ (layout_obj, Qinside_margin)) return GL_INSIDE_MARGIN;
|
|
|
5296 if (EQ (layout_obj, Qwhitespace)) return GL_WHITESPACE;
|
|
|
5297 if (EQ (layout_obj, Qtext)) return GL_TEXT;
|
|
|
5298
|
|
563
|
5299 invalid_constant ("Unknown glyph layout type", layout_obj);
|
|
1204
|
5300 RETURN_NOT_REACHED (GL_TEXT);
|
|
428
|
5301 }
|
|
|
5302
|
|
|
5303 static Lisp_Object
|
|
|
5304 set_extent_glyph_1 (Lisp_Object extent_obj, Lisp_Object glyph, int endp,
|
|
|
5305 Lisp_Object layout_obj)
|
|
|
5306 {
|
|
442
|
5307 EXTENT extent = decode_extent (extent_obj, 0);
|
|
428
|
5308 glyph_layout layout = symbol_to_glyph_layout (layout_obj);
|
|
|
5309
|
|
|
5310 /* Make sure we've actually been given a valid glyph or it's nil
|
|
|
5311 (meaning we're deleting a glyph from an extent). */
|
|
|
5312 if (!NILP (glyph))
|
|
|
5313 CHECK_BUFFER_GLYPH (glyph);
|
|
|
5314
|
|
|
5315 set_extent_glyph (extent, glyph, endp, layout);
|
|
|
5316 return glyph;
|
|
|
5317 }
|
|
|
5318
|
|
|
5319 DEFUN ("set-extent-begin-glyph", Fset_extent_begin_glyph, 2, 3, 0, /*
|
|
|
5320 Display a bitmap, subwindow or string at the beginning of EXTENT.
|
|
|
5321 BEGIN-GLYPH must be a glyph object. The layout policy defaults to `text'.
|
|
|
5322 */
|
|
|
5323 (extent, begin_glyph, layout))
|
|
|
5324 {
|
|
|
5325 return set_extent_glyph_1 (extent, begin_glyph, 0, layout);
|
|
|
5326 }
|
|
|
5327
|
|
|
5328 DEFUN ("set-extent-end-glyph", Fset_extent_end_glyph, 2, 3, 0, /*
|
|
|
5329 Display a bitmap, subwindow or string at the end of EXTENT.
|
|
|
5330 END-GLYPH must be a glyph object. The layout policy defaults to `text'.
|
|
|
5331 */
|
|
|
5332 (extent, end_glyph, layout))
|
|
|
5333 {
|
|
|
5334 return set_extent_glyph_1 (extent, end_glyph, 1, layout);
|
|
|
5335 }
|
|
|
5336
|
|
|
5337 DEFUN ("extent-begin-glyph", Fextent_begin_glyph, 1, 1, 0, /*
|
|
|
5338 Return the glyph object displayed at the beginning of EXTENT.
|
|
|
5339 If there is none, nil is returned.
|
|
|
5340 */
|
|
|
5341 (extent))
|
|
|
5342 {
|
|
|
5343 return extent_begin_glyph (decode_extent (extent, 0));
|
|
|
5344 }
|
|
|
5345
|
|
|
5346 DEFUN ("extent-end-glyph", Fextent_end_glyph, 1, 1, 0, /*
|
|
|
5347 Return the glyph object displayed at the end of EXTENT.
|
|
|
5348 If there is none, nil is returned.
|
|
|
5349 */
|
|
|
5350 (extent))
|
|
|
5351 {
|
|
|
5352 return extent_end_glyph (decode_extent (extent, 0));
|
|
|
5353 }
|
|
|
5354
|
|
|
5355 DEFUN ("set-extent-begin-glyph-layout", Fset_extent_begin_glyph_layout, 2, 2, 0, /*
|
|
|
5356 Set the layout policy of EXTENT's begin glyph.
|
|
|
5357 Access this using the `extent-begin-glyph-layout' function.
|
|
|
5358 */
|
|
|
5359 (extent, layout))
|
|
|
5360 {
|
|
|
5361 EXTENT e = decode_extent (extent, 0);
|
|
|
5362 e = extent_ancestor (e);
|
|
647
|
5363 set_extent_begin_glyph_layout (e, symbol_to_glyph_layout (layout));
|
|
826
|
5364 signal_extent_property_changed (e, Qbegin_glyph_layout, 1);
|
|
428
|
5365 return layout;
|
|
|
5366 }
|
|
|
5367
|
|
|
5368 DEFUN ("set-extent-end-glyph-layout", Fset_extent_end_glyph_layout, 2, 2, 0, /*
|
|
|
5369 Set the layout policy of EXTENT's end glyph.
|
|
|
5370 Access this using the `extent-end-glyph-layout' function.
|
|
|
5371 */
|
|
|
5372 (extent, layout))
|
|
|
5373 {
|
|
|
5374 EXTENT e = decode_extent (extent, 0);
|
|
|
5375 e = extent_ancestor (e);
|
|
647
|
5376 set_extent_end_glyph_layout (e, symbol_to_glyph_layout (layout));
|
|
826
|
5377 signal_extent_property_changed (e, Qend_glyph_layout, 1);
|
|
428
|
5378 return layout;
|
|
|
5379 }
|
|
|
5380
|
|
|
5381 DEFUN ("extent-begin-glyph-layout", Fextent_begin_glyph_layout, 1, 1, 0, /*
|
|
|
5382 Return the layout policy associated with EXTENT's begin glyph.
|
|
|
5383 Set this using the `set-extent-begin-glyph-layout' function.
|
|
|
5384 */
|
|
|
5385 (extent))
|
|
|
5386 {
|
|
|
5387 EXTENT e = decode_extent (extent, 0);
|
|
|
5388 return glyph_layout_to_symbol ((glyph_layout) extent_begin_glyph_layout (e));
|
|
|
5389 }
|
|
|
5390
|
|
|
5391 DEFUN ("extent-end-glyph-layout", Fextent_end_glyph_layout, 1, 1, 0, /*
|
|
|
5392 Return the layout policy associated with EXTENT's end glyph.
|
|
|
5393 Set this using the `set-extent-end-glyph-layout' function.
|
|
|
5394 */
|
|
|
5395 (extent))
|
|
|
5396 {
|
|
|
5397 EXTENT e = decode_extent (extent, 0);
|
|
|
5398 return glyph_layout_to_symbol ((glyph_layout) extent_end_glyph_layout (e));
|
|
|
5399 }
|
|
|
5400
|
|
|
5401 DEFUN ("set-extent-priority", Fset_extent_priority, 2, 2, 0, /*
|
|
|
5402 Set the display priority of EXTENT to PRIORITY (an integer).
|
|
|
5403 When the extent attributes are being merged for display, the priority
|
|
|
5404 is used to determine which extent takes precedence in the event of a
|
|
|
5405 conflict (two extents whose faces both specify font, for example: the
|
|
|
5406 font of the extent with the higher priority will be used).
|
|
|
5407 Extents are created with priority 0; priorities may be negative.
|
|
|
5408 */
|
|
|
5409 (extent, priority))
|
|
|
5410 {
|
|
|
5411 EXTENT e = decode_extent (extent, 0);
|
|
|
5412
|
|
|
5413 CHECK_INT (priority);
|
|
|
5414 e = extent_ancestor (e);
|
|
|
5415 set_extent_priority (e, XINT (priority));
|
|
826
|
5416 signal_extent_property_changed (e, Qpriority, 1);
|
|
428
|
5417 return priority;
|
|
|
5418 }
|
|
|
5419
|
|
|
5420 DEFUN ("extent-priority", Fextent_priority, 1, 1, 0, /*
|
|
|
5421 Return the display priority of EXTENT; see `set-extent-priority'.
|
|
|
5422 */
|
|
|
5423 (extent))
|
|
|
5424 {
|
|
|
5425 EXTENT e = decode_extent (extent, 0);
|
|
|
5426 return make_int (extent_priority (e));
|
|
|
5427 }
|
|
|
5428
|
|
|
5429 DEFUN ("set-extent-property", Fset_extent_property, 3, 3, 0, /*
|
|
|
5430 Change a property of an extent.
|
|
|
5431 PROPERTY may be any symbol; the value stored may be accessed with
|
|
|
5432 the `extent-property' function.
|
|
|
5433 The following symbols have predefined meanings:
|
|
|
5434
|
|
|
5435 detached Removes the extent from its buffer; setting this is
|
|
|
5436 the same as calling `detach-extent'.
|
|
|
5437
|
|
|
5438 destroyed Removes the extent from its buffer, and makes it
|
|
|
5439 unusable in the future; this is the same calling
|
|
|
5440 `delete-extent'.
|
|
|
5441
|
|
|
5442 priority Change redisplay priority; same as `set-extent-priority'.
|
|
|
5443
|
|
|
5444 start-open Whether the set of characters within the extent is
|
|
|
5445 treated being open on the left, that is, whether
|
|
|
5446 the start position is an exclusive, rather than
|
|
|
5447 inclusive, boundary. If true, then characters
|
|
|
5448 inserted exactly at the beginning of the extent
|
|
|
5449 will remain outside of the extent; otherwise they
|
|
|
5450 will go into the extent, extending it.
|
|
|
5451
|
|
|
5452 end-open Whether the set of characters within the extent is
|
|
|
5453 treated being open on the right, that is, whether
|
|
|
5454 the end position is an exclusive, rather than
|
|
|
5455 inclusive, boundary. If true, then characters
|
|
|
5456 inserted exactly at the end of the extent will
|
|
|
5457 remain outside of the extent; otherwise they will
|
|
|
5458 go into the extent, extending it.
|
|
|
5459
|
|
|
5460 By default, extents have the `end-open' but not the
|
|
|
5461 `start-open' property set.
|
|
|
5462
|
|
|
5463 read-only Text within this extent will be unmodifiable.
|
|
|
5464
|
|
|
5465 initial-redisplay-function (EXPERIMENTAL)
|
|
|
5466 function to be called the first time (part of) the extent
|
|
|
5467 is redisplayed. It will be called with the extent as its
|
|
|
5468 first argument.
|
|
1041
|
5469 Note: The function will not be called immediately
|
|
|
5470 during redisplay, an eval event will be dispatched.
|
|
428
|
5471
|
|
|
5472 detachable Whether the extent gets detached (as with
|
|
|
5473 `detach-extent') when all the text within the
|
|
|
5474 extent is deleted. This is true by default. If
|
|
|
5475 this property is not set, the extent becomes a
|
|
|
5476 zero-length extent when its text is deleted. (In
|
|
|
5477 such a case, the `start-open' property is
|
|
|
5478 automatically removed if both the `start-open' and
|
|
|
5479 `end-open' properties are set, since zero-length
|
|
|
5480 extents open on both ends are not allowed.)
|
|
|
5481
|
|
|
5482 face The face in which to display the text. Setting
|
|
|
5483 this is the same as calling `set-extent-face'.
|
|
|
5484
|
|
1041
|
5485 mouse-face If non-nil, the extent will be highlighted in this
|
|
|
5486 face when the mouse moves over it.
|
|
428
|
5487
|
|
|
5488 pointer If non-nil, and a valid pointer glyph, this specifies
|
|
|
5489 the shape of the mouse pointer while over the extent.
|
|
|
5490
|
|
|
5491 highlight Obsolete: Setting this property is equivalent to
|
|
1041
|
5492 setting a `mouse-face' property of `highlight'.
|
|
|
5493 Reading this property returns non-nil if
|
|
|
5494 the extent has a non-nil `mouse-face' property.
|
|
428
|
5495
|
|
|
5496 duplicable Whether this extent should be copied into strings,
|
|
|
5497 so that kill, yank, and undo commands will restore
|
|
|
5498 or copy it. `duplicable' extents are copied from
|
|
|
5499 an extent into a string when `buffer-substring' or
|
|
|
5500 a similar function creates a string. The extents
|
|
|
5501 in a string are copied into other strings created
|
|
|
5502 from the string using `concat' or `substring'.
|
|
|
5503 When `insert' or a similar function inserts the
|
|
|
5504 string into a buffer, the extents are copied back
|
|
|
5505 into the buffer.
|
|
|
5506
|
|
|
5507 unique Meaningful only in conjunction with `duplicable'.
|
|
|
5508 When this is set, there may be only one instance
|
|
|
5509 of this extent attached at a time: if it is copied
|
|
|
5510 to the kill ring and then yanked, the extent is
|
|
|
5511 not copied. If, however, it is killed (removed
|
|
|
5512 from the buffer) and then yanked, it will be
|
|
|
5513 re-attached at the new position.
|
|
|
5514
|
|
|
5515 invisible If the value is non-nil, text under this extent
|
|
|
5516 may be treated as not present for the purpose of
|
|
|
5517 redisplay, or may be displayed using an ellipsis
|
|
|
5518 or other marker; see `buffer-invisibility-spec'
|
|
|
5519 and `invisible-text-glyph'. In all cases,
|
|
|
5520 however, the text is still visible to other
|
|
|
5521 functions that examine a buffer's text.
|
|
|
5522
|
|
|
5523 keymap This keymap is consulted for mouse clicks on this
|
|
|
5524 extent, or keypresses made while point is within the
|
|
|
5525 extent.
|
|
|
5526
|
|
|
5527 copy-function This is a hook that is run when a duplicable extent
|
|
|
5528 is about to be copied from a buffer to a string (or
|
|
|
5529 the kill ring). It is called with three arguments,
|
|
|
5530 the extent, and the buffer-positions within it
|
|
|
5531 which are being copied. If this function returns
|
|
|
5532 nil, then the extent will not be copied; otherwise
|
|
|
5533 it will.
|
|
|
5534
|
|
|
5535 paste-function This is a hook that is run when a duplicable extent is
|
|
|
5536 about to be copied from a string (or the kill ring)
|
|
|
5537 into a buffer. It is called with three arguments,
|
|
|
5538 the original extent, and the buffer positions which
|
|
|
5539 the copied extent will occupy. (This hook is run
|
|
|
5540 after the corresponding text has already been
|
|
|
5541 inserted into the buffer.) Note that the extent
|
|
|
5542 argument may be detached when this function is run.
|
|
|
5543 If this function returns nil, no extent will be
|
|
|
5544 inserted. Otherwise, there will be an extent
|
|
|
5545 covering the range in question.
|
|
|
5546
|
|
|
5547 If the original extent is not attached to a buffer,
|
|
|
5548 then it will be re-attached at this range.
|
|
|
5549 Otherwise, a copy will be made, and that copy
|
|
|
5550 attached here.
|
|
|
5551
|
|
|
5552 The copy-function and paste-function are meaningful
|
|
|
5553 only for extents with the `duplicable' flag set,
|
|
|
5554 and if they are not specified, behave as if `t' was
|
|
|
5555 the returned value. When these hooks are invoked,
|
|
|
5556 the current buffer is the buffer which the extent
|
|
|
5557 is being copied from/to, respectively.
|
|
|
5558
|
|
|
5559 begin-glyph A glyph to be displayed at the beginning of the extent,
|
|
|
5560 or nil.
|
|
|
5561
|
|
|
5562 end-glyph A glyph to be displayed at the end of the extent,
|
|
|
5563 or nil.
|
|
|
5564
|
|
|
5565 begin-glyph-layout The layout policy (one of `text', `whitespace',
|
|
|
5566 `inside-margin', or `outside-margin') of the extent's
|
|
|
5567 begin glyph.
|
|
|
5568
|
|
1041
|
5569 end-glyph-layout The layout policy of the extent's end glyph.
|
|
|
5570
|
|
|
5571 syntax-table A cons or a syntax table object. If a cons, the car must
|
|
|
5572 be an integer (interpreted as a syntax code, applicable to
|
|
|
5573 all characters in the extent). Otherwise, syntax of
|
|
|
5574 characters in the extent is looked up in the syntax table.
|
|
|
5575 You should use the text property API to manipulate this
|
|
|
5576 property. (This may be required in the future.)
|
|
428
|
5577 */
|
|
|
5578 (extent, property, value))
|
|
|
5579 {
|
|
|
5580 /* This function can GC if property is `keymap' */
|
|
|
5581 EXTENT e = decode_extent (extent, 0);
|
|
826
|
5582 int signal_change = 0;
|
|
|
5583
|
|
|
5584 /* If VALUE is unbound, the property is being removed through `remprop'.
|
|
|
5585 Return Qunbound if removal disallowed, Qt if anything removed,
|
|
|
5586 Qnil otherwise. */
|
|
|
5587
|
|
|
5588 /* Keep in synch with stuff below. */
|
|
|
5589 if (UNBOUNDP (value))
|
|
|
5590 {
|
|
|
5591 int retval;
|
|
|
5592
|
|
|
5593 if (EQ (property, Qread_only)
|
|
|
5594 || EQ (property, Qunique)
|
|
|
5595 || EQ (property, Qduplicable)
|
|
|
5596 || EQ (property, Qinvisible)
|
|
|
5597 || EQ (property, Qdetachable)
|
|
|
5598 || EQ (property, Qdetached)
|
|
|
5599 || EQ (property, Qdestroyed)
|
|
|
5600 || EQ (property, Qpriority)
|
|
|
5601 || EQ (property, Qface)
|
|
|
5602 || EQ (property, Qinitial_redisplay_function)
|
|
|
5603 || EQ (property, Qafter_change_functions)
|
|
|
5604 || EQ (property, Qbefore_change_functions)
|
|
|
5605 || EQ (property, Qmouse_face)
|
|
|
5606 || EQ (property, Qhighlight)
|
|
|
5607 || EQ (property, Qbegin_glyph_layout)
|
|
|
5608 || EQ (property, Qend_glyph_layout)
|
|
|
5609 || EQ (property, Qglyph_layout)
|
|
|
5610 || EQ (property, Qbegin_glyph)
|
|
|
5611 || EQ (property, Qend_glyph)
|
|
|
5612 || EQ (property, Qstart_open)
|
|
|
5613 || EQ (property, Qend_open)
|
|
|
5614 || EQ (property, Qstart_closed)
|
|
|
5615 || EQ (property, Qend_closed)
|
|
|
5616 || EQ (property, Qkeymap))
|
|
|
5617 return Qunbound;
|
|
|
5618
|
|
|
5619 retval = external_remprop (extent_plist_addr (e), property, 0,
|
|
|
5620 ERROR_ME);
|
|
|
5621 if (retval)
|
|
|
5622 signal_extent_property_changed (e, property, 1);
|
|
|
5623 return retval ? Qt : Qnil;
|
|
|
5624 }
|
|
428
|
5625
|
|
|
5626 if (EQ (property, Qread_only))
|
|
826
|
5627 {
|
|
|
5628 set_extent_read_only (e, value);
|
|
|
5629 signal_change = 1;
|
|
|
5630 }
|
|
428
|
5631 else if (EQ (property, Qunique))
|
|
826
|
5632 {
|
|
|
5633 extent_unique_p (e) = !NILP (value);
|
|
|
5634 signal_change = 1;
|
|
|
5635 }
|
|
428
|
5636 else if (EQ (property, Qduplicable))
|
|
826
|
5637 {
|
|
|
5638 extent_duplicable_p (e) = !NILP (value);
|
|
|
5639 signal_change = 1;
|
|
|
5640 }
|
|
428
|
5641 else if (EQ (property, Qinvisible))
|
|
|
5642 set_extent_invisible (e, value);
|
|
|
5643 else if (EQ (property, Qdetachable))
|
|
826
|
5644 {
|
|
|
5645 extent_detachable_p (e) = !NILP (value);
|
|
|
5646 signal_change = 1;
|
|
|
5647 }
|
|
428
|
5648 else if (EQ (property, Qdetached))
|
|
|
5649 {
|
|
|
5650 if (NILP (value))
|
|
826
|
5651 invalid_operation ("can only set `detached' to t", Qunbound);
|
|
428
|
5652 Fdetach_extent (extent);
|
|
|
5653 }
|
|
|
5654 else if (EQ (property, Qdestroyed))
|
|
|
5655 {
|
|
|
5656 if (NILP (value))
|
|
826
|
5657 invalid_operation ("can only set `destroyed' to t", Qunbound);
|
|
428
|
5658 Fdelete_extent (extent);
|
|
|
5659 }
|
|
|
5660 else if (EQ (property, Qpriority))
|
|
|
5661 Fset_extent_priority (extent, value);
|
|
|
5662 else if (EQ (property, Qface))
|
|
|
5663 Fset_extent_face (extent, value);
|
|
|
5664 else if (EQ (property, Qinitial_redisplay_function))
|
|
|
5665 Fset_extent_initial_redisplay_function (extent, value);
|
|
|
5666 else if (EQ (property, Qbefore_change_functions))
|
|
826
|
5667 {
|
|
|
5668 set_extent_before_change_functions (e, value);
|
|
|
5669 signal_change = 1;
|
|
|
5670 }
|
|
428
|
5671 else if (EQ (property, Qafter_change_functions))
|
|
826
|
5672 {
|
|
|
5673 set_extent_after_change_functions (e, value);
|
|
|
5674 signal_change = 1;
|
|
|
5675 }
|
|
428
|
5676 else if (EQ (property, Qmouse_face))
|
|
|
5677 Fset_extent_mouse_face (extent, value);
|
|
|
5678 /* Obsolete: */
|
|
|
5679 else if (EQ (property, Qhighlight))
|
|
|
5680 Fset_extent_mouse_face (extent, Qhighlight);
|
|
|
5681 else if (EQ (property, Qbegin_glyph_layout))
|
|
|
5682 Fset_extent_begin_glyph_layout (extent, value);
|
|
|
5683 else if (EQ (property, Qend_glyph_layout))
|
|
|
5684 Fset_extent_end_glyph_layout (extent, value);
|
|
|
5685 /* For backwards compatibility. We use begin glyph because it is by
|
|
|
5686 far the more used of the two. */
|
|
|
5687 else if (EQ (property, Qglyph_layout))
|
|
|
5688 Fset_extent_begin_glyph_layout (extent, value);
|
|
|
5689 else if (EQ (property, Qbegin_glyph))
|
|
|
5690 Fset_extent_begin_glyph (extent, value, Qnil);
|
|
|
5691 else if (EQ (property, Qend_glyph))
|
|
|
5692 Fset_extent_end_glyph (extent, value, Qnil);
|
|
|
5693 else if (EQ (property, Qstart_open))
|
|
|
5694 set_extent_openness (e, !NILP (value), -1);
|
|
|
5695 else if (EQ (property, Qend_open))
|
|
|
5696 set_extent_openness (e, -1, !NILP (value));
|
|
|
5697 /* Support (but don't document...) the obvious *_closed antonyms. */
|
|
|
5698 else if (EQ (property, Qstart_closed))
|
|
|
5699 set_extent_openness (e, NILP (value), -1);
|
|
|
5700 else if (EQ (property, Qend_closed))
|
|
|
5701 set_extent_openness (e, -1, NILP (value));
|
|
|
5702 else
|
|
|
5703 {
|
|
|
5704 if (EQ (property, Qkeymap))
|
|
|
5705 while (!NILP (value) && NILP (Fkeymapp (value)))
|
|
|
5706 value = wrong_type_argument (Qkeymapp, value);
|
|
|
5707
|
|
|
5708 external_plist_put (extent_plist_addr (e), property, value, 0, ERROR_ME);
|
|
826
|
5709 signal_change = 1;
|
|
428
|
5710 }
|
|
|
5711
|
|
826
|
5712 if (signal_change)
|
|
|
5713 signal_extent_property_changed (e, property, 1);
|
|
428
|
5714 return value;
|
|
|
5715 }
|
|
|
5716
|
|
|
5717 DEFUN ("set-extent-properties", Fset_extent_properties, 2, 2, 0, /*
|
|
|
5718 Change some properties of EXTENT.
|
|
|
5719 PLIST is a property list.
|
|
|
5720 For a list of built-in properties, see `set-extent-property'.
|
|
|
5721 */
|
|
|
5722 (extent, plist))
|
|
|
5723 {
|
|
|
5724 /* This function can GC, if one of the properties is `keymap' */
|
|
|
5725 Lisp_Object property, value;
|
|
|
5726 struct gcpro gcpro1;
|
|
|
5727 GCPRO1 (plist);
|
|
|
5728
|
|
|
5729 plist = Fcopy_sequence (plist);
|
|
|
5730 Fcanonicalize_plist (plist, Qnil);
|
|
|
5731
|
|
|
5732 while (!NILP (plist))
|
|
|
5733 {
|
|
|
5734 property = Fcar (plist); plist = Fcdr (plist);
|
|
|
5735 value = Fcar (plist); plist = Fcdr (plist);
|
|
|
5736 Fset_extent_property (extent, property, value);
|
|
|
5737 }
|
|
|
5738 UNGCPRO;
|
|
|
5739 return Qnil;
|
|
|
5740 }
|
|
|
5741
|
|
|
5742 DEFUN ("extent-property", Fextent_property, 2, 3, 0, /*
|
|
|
5743 Return EXTENT's value for property PROPERTY.
|
|
444
|
5744 If no such property exists, DEFAULT is returned.
|
|
428
|
5745 See `set-extent-property' for the built-in property names.
|
|
|
5746 */
|
|
|
5747 (extent, property, default_))
|
|
|
5748 {
|
|
|
5749 EXTENT e = decode_extent (extent, 0);
|
|
|
5750
|
|
|
5751 if (EQ (property, Qdetached))
|
|
|
5752 return extent_detached_p (e) ? Qt : Qnil;
|
|
|
5753 else if (EQ (property, Qdestroyed))
|
|
|
5754 return !EXTENT_LIVE_P (e) ? Qt : Qnil;
|
|
|
5755 else if (EQ (property, Qstart_open))
|
|
|
5756 return extent_normal_field (e, start_open) ? Qt : Qnil;
|
|
|
5757 else if (EQ (property, Qend_open))
|
|
|
5758 return extent_normal_field (e, end_open) ? Qt : Qnil;
|
|
|
5759 else if (EQ (property, Qunique))
|
|
|
5760 return extent_normal_field (e, unique) ? Qt : Qnil;
|
|
|
5761 else if (EQ (property, Qduplicable))
|
|
|
5762 return extent_normal_field (e, duplicable) ? Qt : Qnil;
|
|
|
5763 else if (EQ (property, Qdetachable))
|
|
|
5764 return extent_normal_field (e, detachable) ? Qt : Qnil;
|
|
|
5765 /* Support (but don't document...) the obvious *_closed antonyms. */
|
|
|
5766 else if (EQ (property, Qstart_closed))
|
|
|
5767 return extent_start_open_p (e) ? Qnil : Qt;
|
|
|
5768 else if (EQ (property, Qend_closed))
|
|
|
5769 return extent_end_open_p (e) ? Qnil : Qt;
|
|
|
5770 else if (EQ (property, Qpriority))
|
|
|
5771 return make_int (extent_priority (e));
|
|
|
5772 else if (EQ (property, Qread_only))
|
|
|
5773 return extent_read_only (e);
|
|
|
5774 else if (EQ (property, Qinvisible))
|
|
|
5775 return extent_invisible (e);
|
|
|
5776 else if (EQ (property, Qface))
|
|
|
5777 return Fextent_face (extent);
|
|
|
5778 else if (EQ (property, Qinitial_redisplay_function))
|
|
|
5779 return extent_initial_redisplay_function (e);
|
|
|
5780 else if (EQ (property, Qbefore_change_functions))
|
|
|
5781 return extent_before_change_functions (e);
|
|
|
5782 else if (EQ (property, Qafter_change_functions))
|
|
|
5783 return extent_after_change_functions (e);
|
|
|
5784 else if (EQ (property, Qmouse_face))
|
|
|
5785 return Fextent_mouse_face (extent);
|
|
|
5786 /* Obsolete: */
|
|
|
5787 else if (EQ (property, Qhighlight))
|
|
|
5788 return !NILP (Fextent_mouse_face (extent)) ? Qt : Qnil;
|
|
|
5789 else if (EQ (property, Qbegin_glyph_layout))
|
|
|
5790 return Fextent_begin_glyph_layout (extent);
|
|
|
5791 else if (EQ (property, Qend_glyph_layout))
|
|
|
5792 return Fextent_end_glyph_layout (extent);
|
|
|
5793 /* For backwards compatibility. We use begin glyph because it is by
|
|
|
5794 far the more used of the two. */
|
|
|
5795 else if (EQ (property, Qglyph_layout))
|
|
|
5796 return Fextent_begin_glyph_layout (extent);
|
|
|
5797 else if (EQ (property, Qbegin_glyph))
|
|
|
5798 return extent_begin_glyph (e);
|
|
|
5799 else if (EQ (property, Qend_glyph))
|
|
|
5800 return extent_end_glyph (e);
|
|
|
5801 else
|
|
|
5802 {
|
|
|
5803 Lisp_Object value = external_plist_get (extent_plist_addr (e),
|
|
|
5804 property, 0, ERROR_ME);
|
|
|
5805 return UNBOUNDP (value) ? default_ : value;
|
|
|
5806 }
|
|
|
5807 }
|
|
|
5808
|
|
826
|
5809 static void
|
|
|
5810 extent_properties (EXTENT e, Lisp_Object_pair_dynarr *props)
|
|
|
5811 {
|
|
|
5812 Lisp_Object face, anc_obj;
|
|
428
|
5813 glyph_layout layout;
|
|
826
|
5814 EXTENT anc;
|
|
|
5815
|
|
|
5816 #define ADD_PROP(miftaaH, maal) \
|
|
|
5817 do { \
|
|
|
5818 Lisp_Object_pair p; \
|
|
|
5819 p.key = miftaaH; \
|
|
|
5820 p.value = maal; \
|
|
|
5821 Dynarr_add (props, p); \
|
|
|
5822 } while (0)
|
|
|
5823
|
|
428
|
5824 if (!EXTENT_LIVE_P (e))
|
|
826
|
5825 {
|
|
|
5826 ADD_PROP (Qdestroyed, Qt);
|
|
|
5827 return;
|
|
|
5828 }
|
|
428
|
5829
|
|
|
5830 anc = extent_ancestor (e);
|
|
793
|
5831 anc_obj = wrap_extent (anc);
|
|
428
|
5832
|
|
|
5833 /* For efficiency, use the ancestor for all properties except detached */
|
|
826
|
5834 {
|
|
|
5835 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, extent_plist_slot (anc))
|
|
|
5836 ADD_PROP (key, value);
|
|
|
5837 }
|
|
428
|
5838
|
|
|
5839 if (!NILP (face = Fextent_face (anc_obj)))
|
|
826
|
5840 ADD_PROP (Qface, face);
|
|
428
|
5841
|
|
|
5842 if (!NILP (face = Fextent_mouse_face (anc_obj)))
|
|
826
|
5843 ADD_PROP (Qmouse_face, face);
|
|
428
|
5844
|
|
|
5845 if ((layout = (glyph_layout) extent_begin_glyph_layout (anc)) != GL_TEXT)
|
|
|
5846 {
|
|
|
5847 Lisp_Object sym = glyph_layout_to_symbol (layout);
|
|
826
|
5848 ADD_PROP (Qglyph_layout, sym); /* compatibility */
|
|
|
5849 ADD_PROP (Qbegin_glyph_layout, sym);
|
|
428
|
5850 }
|
|
|
5851
|
|
|
5852 if ((layout = (glyph_layout) extent_end_glyph_layout (anc)) != GL_TEXT)
|
|
826
|
5853 ADD_PROP (Qend_glyph_layout, glyph_layout_to_symbol (layout));
|
|
428
|
5854
|
|
|
5855 if (!NILP (extent_end_glyph (anc)))
|
|
826
|
5856 ADD_PROP (Qend_glyph, extent_end_glyph (anc));
|
|
428
|
5857
|
|
|
5858 if (!NILP (extent_begin_glyph (anc)))
|
|
826
|
5859 ADD_PROP (Qbegin_glyph, extent_begin_glyph (anc));
|
|
428
|
5860
|
|
|
5861 if (extent_priority (anc) != 0)
|
|
826
|
5862 ADD_PROP (Qpriority, make_int (extent_priority (anc)));
|
|
428
|
5863
|
|
|
5864 if (!NILP (extent_initial_redisplay_function (anc)))
|
|
826
|
5865 ADD_PROP (Qinitial_redisplay_function,
|
|
|
5866 extent_initial_redisplay_function (anc));
|
|
428
|
5867
|
|
|
5868 if (!NILP (extent_before_change_functions (anc)))
|
|
826
|
5869 ADD_PROP (Qbefore_change_functions, extent_before_change_functions (anc));
|
|
428
|
5870
|
|
|
5871 if (!NILP (extent_after_change_functions (anc)))
|
|
826
|
5872 ADD_PROP (Qafter_change_functions, extent_after_change_functions (anc));
|
|
428
|
5873
|
|
|
5874 if (!NILP (extent_invisible (anc)))
|
|
826
|
5875 ADD_PROP (Qinvisible, extent_invisible (anc));
|
|
428
|
5876
|
|
|
5877 if (!NILP (extent_read_only (anc)))
|
|
826
|
5878 ADD_PROP (Qread_only, extent_read_only (anc));
|
|
428
|
5879
|
|
|
5880 if (extent_normal_field (anc, end_open))
|
|
826
|
5881 ADD_PROP (Qend_open, Qt);
|
|
428
|
5882
|
|
|
5883 if (extent_normal_field (anc, start_open))
|
|
826
|
5884 ADD_PROP (Qstart_open, Qt);
|
|
428
|
5885
|
|
|
5886 if (extent_normal_field (anc, detachable))
|
|
826
|
5887 ADD_PROP (Qdetachable, Qt);
|
|
428
|
5888
|
|
|
5889 if (extent_normal_field (anc, duplicable))
|
|
826
|
5890 ADD_PROP (Qduplicable, Qt);
|
|
428
|
5891
|
|
|
5892 if (extent_normal_field (anc, unique))
|
|
826
|
5893 ADD_PROP (Qunique, Qt);
|
|
428
|
5894
|
|
|
5895 /* detached is not an inherited property */
|
|
|
5896 if (extent_detached_p (e))
|
|
826
|
5897 ADD_PROP (Qdetached, Qt);
|
|
|
5898
|
|
|
5899 #undef ADD_PROP
|
|
|
5900 }
|
|
|
5901
|
|
|
5902 DEFUN ("extent-properties", Fextent_properties, 1, 1, 0, /*
|
|
|
5903 Return a property list of the attributes of EXTENT.
|
|
|
5904 Do not modify this list; use `set-extent-property' instead.
|
|
|
5905 */
|
|
|
5906 (extent))
|
|
|
5907 {
|
|
|
5908 EXTENT e;
|
|
|
5909 Lisp_Object result = Qnil;
|
|
|
5910 Lisp_Object_pair_dynarr *props;
|
|
|
5911 int i;
|
|
|
5912
|
|
|
5913 CHECK_EXTENT (extent);
|
|
|
5914 e = XEXTENT (extent);
|
|
|
5915 props = Dynarr_new (Lisp_Object_pair);
|
|
|
5916 extent_properties (e, props);
|
|
|
5917
|
|
|
5918 for (i = 0; i < Dynarr_length (props); i++)
|
|
|
5919 result = cons3 (Dynarr_at (props, i).key, Dynarr_at (props, i).value,
|
|
|
5920 result);
|
|
|
5921
|
|
|
5922 Dynarr_free (props);
|
|
428
|
5923 return result;
|
|
|
5924 }
|
|
|
5925
|
|
|
5926
|
|
|
5927 /************************************************************************/
|
|
|
5928 /* highlighting */
|
|
|
5929 /************************************************************************/
|
|
|
5930
|
|
|
5931 /* The display code looks into the Vlast_highlighted_extent variable to
|
|
|
5932 correctly display highlighted extents. This updates that variable,
|
|
|
5933 and marks the appropriate buffers as needing some redisplay.
|
|
|
5934 */
|
|
|
5935 static void
|
|
|
5936 do_highlight (Lisp_Object extent_obj, int highlight_p)
|
|
|
5937 {
|
|
|
5938 if (( highlight_p && (EQ (Vlast_highlighted_extent, extent_obj))) ||
|
|
|
5939 (!highlight_p && (EQ (Vlast_highlighted_extent, Qnil))))
|
|
|
5940 return;
|
|
|
5941 if (EXTENTP (Vlast_highlighted_extent) &&
|
|
|
5942 EXTENT_LIVE_P (XEXTENT (Vlast_highlighted_extent)))
|
|
|
5943 {
|
|
|
5944 /* do not recurse on descendants. Only one extent is highlighted
|
|
|
5945 at a time. */
|
|
826
|
5946 /* A bit of a lie. */
|
|
|
5947 signal_extent_property_changed (XEXTENT (Vlast_highlighted_extent),
|
|
|
5948 Qface, 0);
|
|
428
|
5949 }
|
|
|
5950 Vlast_highlighted_extent = Qnil;
|
|
|
5951 if (!NILP (extent_obj)
|
|
|
5952 && BUFFERP (extent_object (XEXTENT (extent_obj)))
|
|
|
5953 && highlight_p)
|
|
|
5954 {
|
|
826
|
5955 signal_extent_property_changed (XEXTENT (extent_obj), Qface, 0);
|
|
428
|
5956 Vlast_highlighted_extent = extent_obj;
|
|
|
5957 }
|
|
|
5958 }
|
|
|
5959
|
|
|
5960 DEFUN ("force-highlight-extent", Fforce_highlight_extent, 1, 2, 0, /*
|
|
|
5961 Highlight or unhighlight the given extent.
|
|
|
5962 If the second arg is non-nil, it will be highlighted, else dehighlighted.
|
|
|
5963 This is the same as `highlight-extent', except that it will work even
|
|
|
5964 on extents without the `mouse-face' property.
|
|
|
5965 */
|
|
|
5966 (extent, highlight_p))
|
|
|
5967 {
|
|
|
5968 if (NILP (extent))
|
|
|
5969 highlight_p = Qnil;
|
|
|
5970 else
|
|
793
|
5971 extent = wrap_extent (decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
428
|
5972 do_highlight (extent, !NILP (highlight_p));
|
|
|
5973 return Qnil;
|
|
|
5974 }
|
|
|
5975
|
|
|
5976 DEFUN ("highlight-extent", Fhighlight_extent, 1, 2, 0, /*
|
|
|
5977 Highlight EXTENT, if it is highlightable.
|
|
|
5978 \(that is, if it has the `mouse-face' property).
|
|
|
5979 If the second arg is non-nil, it will be highlighted, else dehighlighted.
|
|
|
5980 Highlighted extents are displayed as if they were merged with the face
|
|
|
5981 or faces specified by the `mouse-face' property.
|
|
|
5982 */
|
|
|
5983 (extent, highlight_p))
|
|
|
5984 {
|
|
|
5985 if (EXTENTP (extent) && NILP (extent_mouse_face (XEXTENT (extent))))
|
|
|
5986 return Qnil;
|
|
|
5987 else
|
|
|
5988 return Fforce_highlight_extent (extent, highlight_p);
|
|
|
5989 }
|
|
|
5990
|
|
|
5991
|
|
|
5992 /************************************************************************/
|
|
|
5993 /* strings and extents */
|
|
|
5994 /************************************************************************/
|
|
|
5995
|
|
|
5996 /* copy/paste hooks */
|
|
|
5997
|
|
|
5998 static int
|
|
826
|
5999 run_extent_copy_paste_internal (EXTENT e, Charxpos from, Charxpos to,
|
|
428
|
6000 Lisp_Object object,
|
|
|
6001 Lisp_Object prop)
|
|
|
6002 {
|
|
|
6003 /* This function can GC */
|
|
|
6004 Lisp_Object extent;
|
|
|
6005 Lisp_Object copy_fn;
|
|
793
|
6006 extent = wrap_extent (e);
|
|
428
|
6007 copy_fn = Fextent_property (extent, prop, Qnil);
|
|
|
6008 if (!NILP (copy_fn))
|
|
|
6009 {
|
|
|
6010 Lisp_Object flag;
|
|
|
6011 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
6012 GCPRO3 (extent, copy_fn, object);
|
|
|
6013 if (BUFFERP (object))
|
|
|
6014 flag = call3_in_buffer (XBUFFER (object), copy_fn, extent,
|
|
|
6015 make_int (from), make_int (to));
|
|
|
6016 else
|
|
|
6017 flag = call3 (copy_fn, extent, make_int (from), make_int (to));
|
|
|
6018 UNGCPRO;
|
|
|
6019 if (NILP (flag) || !EXTENT_LIVE_P (XEXTENT (extent)))
|
|
|
6020 return 0;
|
|
|
6021 }
|
|
|
6022 return 1;
|
|
|
6023 }
|
|
|
6024
|
|
|
6025 static int
|
|
826
|
6026 run_extent_copy_function (EXTENT e, Bytexpos from, Bytexpos to)
|
|
428
|
6027 {
|
|
|
6028 Lisp_Object object = extent_object (e);
|
|
|
6029 /* This function can GC */
|
|
|
6030 return run_extent_copy_paste_internal
|
|
826
|
6031 (e, buffer_or_string_bytexpos_to_charxpos (object, from),
|
|
|
6032 buffer_or_string_bytexpos_to_charxpos (object, to), object,
|
|
428
|
6033 Qcopy_function);
|
|
|
6034 }
|
|
|
6035
|
|
|
6036 static int
|
|
826
|
6037 run_extent_paste_function (EXTENT e, Bytexpos from, Bytexpos to,
|
|
428
|
6038 Lisp_Object object)
|
|
|
6039 {
|
|
|
6040 /* This function can GC */
|
|
|
6041 return run_extent_copy_paste_internal
|
|
826
|
6042 (e, buffer_or_string_bytexpos_to_charxpos (object, from),
|
|
|
6043 buffer_or_string_bytexpos_to_charxpos (object, to), object,
|
|
428
|
6044 Qpaste_function);
|
|
|
6045 }
|
|
|
6046
|
|
826
|
6047 static int
|
|
|
6048 run_extent_paste_function_char (EXTENT e, Charxpos from, Charxpos to,
|
|
|
6049 Lisp_Object object)
|
|
|
6050 {
|
|
|
6051 /* This function can GC */
|
|
|
6052 return run_extent_copy_paste_internal (e, from, to, object, Qpaste_function);
|
|
|
6053 }
|
|
|
6054
|
|
428
|
6055 static Lisp_Object
|
|
826
|
6056 insert_extent (EXTENT extent, Bytexpos new_start, Bytexpos new_end,
|
|
428
|
6057 Lisp_Object object, int run_hooks)
|
|
|
6058 {
|
|
|
6059 /* This function can GC */
|
|
|
6060 if (!EQ (extent_object (extent), object))
|
|
|
6061 goto copy_it;
|
|
|
6062
|
|
|
6063 if (extent_detached_p (extent))
|
|
|
6064 {
|
|
|
6065 if (run_hooks &&
|
|
|
6066 !run_extent_paste_function (extent, new_start, new_end, object))
|
|
|
6067 /* The paste-function said don't re-attach this extent here. */
|
|
|
6068 return Qnil;
|
|
|
6069 else
|
|
826
|
6070 set_extent_endpoints (extent, new_start, new_end, Qnil);
|
|
428
|
6071 }
|
|
|
6072 else
|
|
|
6073 {
|
|
826
|
6074 Bytexpos exstart = extent_endpoint_byte (extent, 0);
|
|
|
6075 Bytexpos exend = extent_endpoint_byte (extent, 1);
|
|
428
|
6076
|
|
|
6077 if (exend < new_start || exstart > new_end)
|
|
|
6078 goto copy_it;
|
|
|
6079 else
|
|
|
6080 {
|
|
|
6081 new_start = min (exstart, new_start);
|
|
|
6082 new_end = max (exend, new_end);
|
|
|
6083 if (exstart != new_start || exend != new_end)
|
|
826
|
6084 set_extent_endpoints (extent, new_start, new_end, Qnil);
|
|
428
|
6085 }
|
|
|
6086 }
|
|
|
6087
|
|
793
|
6088 return wrap_extent (extent);
|
|
428
|
6089
|
|
|
6090 copy_it:
|
|
|
6091 if (run_hooks &&
|
|
|
6092 !run_extent_paste_function (extent, new_start, new_end, object))
|
|
|
6093 /* The paste-function said don't attach a copy of the extent here. */
|
|
|
6094 return Qnil;
|
|
|
6095 else
|
|
793
|
6096 return wrap_extent (copy_extent (extent, new_start, new_end, object));
|
|
428
|
6097 }
|
|
|
6098
|
|
|
6099 DEFUN ("insert-extent", Finsert_extent, 1, 5, 0, /*
|
|
|
6100 Insert EXTENT from START to END in BUFFER-OR-STRING.
|
|
|
6101 BUFFER-OR-STRING defaults to the current buffer if omitted.
|
|
826
|
6102 If EXTENT is already on the same object, and overlaps or is adjacent to
|
|
|
6103 the given range, its range is merely extended to include the new range.
|
|
|
6104 Otherwise, a copy is made of the extent at the new position and object.
|
|
|
6105 When a copy is made, the new extent is returned, copy/paste hooks are run,
|
|
|
6106 and the change is noted for undo recording. When no copy is made, nil is
|
|
|
6107 returned. See documentation on `detach-extent' for a discussion of undo
|
|
|
6108 recording.
|
|
|
6109
|
|
428
|
6110 The fourth arg, NO-HOOKS, can be used to inhibit the running of the
|
|
826
|
6111 extent's `paste-function' property if it has one.
|
|
|
6112
|
|
|
6113 It's not really clear why this function exists any more. It was a holdover
|
|
|
6114 from a much older implementation of extents, before extents could really
|
|
|
6115 exist on strings.
|
|
428
|
6116 */
|
|
|
6117 (extent, start, end, no_hooks, buffer_or_string))
|
|
|
6118 {
|
|
|
6119 EXTENT ext = decode_extent (extent, 0);
|
|
|
6120 Lisp_Object copy;
|
|
826
|
6121 Bytexpos s, e;
|
|
428
|
6122
|
|
|
6123 buffer_or_string = decode_buffer_or_string (buffer_or_string);
|
|
|
6124 get_buffer_or_string_range_byte (buffer_or_string, start, end, &s, &e,
|
|
|
6125 GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
6126
|
|
|
6127 copy = insert_extent (ext, s, e, buffer_or_string, NILP (no_hooks));
|
|
|
6128 if (EXTENTP (copy))
|
|
|
6129 {
|
|
|
6130 if (extent_duplicable_p (XEXTENT (copy)))
|
|
|
6131 record_extent (copy, 1);
|
|
|
6132 }
|
|
|
6133 return copy;
|
|
|
6134 }
|
|
|
6135
|
|
|
6136
|
|
|
6137 /* adding buffer extents to a string */
|
|
|
6138
|
|
|
6139 struct add_string_extents_arg
|
|
|
6140 {
|
|
826
|
6141 Bytexpos from;
|
|
428
|
6142 Bytecount length;
|
|
|
6143 Lisp_Object string;
|
|
|
6144 };
|
|
|
6145
|
|
|
6146 static int
|
|
|
6147 add_string_extents_mapper (EXTENT extent, void *arg)
|
|
|
6148 {
|
|
|
6149 /* This function can GC */
|
|
|
6150 struct add_string_extents_arg *closure =
|
|
|
6151 (struct add_string_extents_arg *) arg;
|
|
826
|
6152 Bytecount start = extent_endpoint_byte (extent, 0) - closure->from;
|
|
|
6153 Bytecount end = extent_endpoint_byte (extent, 1) - closure->from;
|
|
428
|
6154
|
|
|
6155 if (extent_duplicable_p (extent))
|
|
|
6156 {
|
|
|
6157 start = max (start, 0);
|
|
|
6158 end = min (end, closure->length);
|
|
|
6159
|
|
|
6160 /* Run the copy-function to give an extent the option of
|
|
|
6161 not being copied into the string (or kill ring).
|
|
|
6162 */
|
|
|
6163 if (extent_duplicable_p (extent) &&
|
|
|
6164 !run_extent_copy_function (extent, start + closure->from,
|
|
|
6165 end + closure->from))
|
|
|
6166 return 0;
|
|
|
6167 copy_extent (extent, start, end, closure->string);
|
|
|
6168 }
|
|
|
6169
|
|
|
6170 return 0;
|
|
|
6171 }
|
|
|
6172
|
|
826
|
6173 struct add_string_extents_the_hard_way_arg
|
|
|
6174 {
|
|
|
6175 Charxpos from;
|
|
|
6176 Charcount length;
|
|
|
6177 Lisp_Object string;
|
|
|
6178 };
|
|
|
6179
|
|
|
6180 static int
|
|
|
6181 add_string_extents_the_hard_way_mapper (EXTENT extent, void *arg)
|
|
|
6182 {
|
|
|
6183 /* This function can GC */
|
|
|
6184 struct add_string_extents_arg *closure =
|
|
|
6185 (struct add_string_extents_arg *) arg;
|
|
|
6186 Charcount start = extent_endpoint_char (extent, 0) - closure->from;
|
|
|
6187 Charcount end = extent_endpoint_char (extent, 1) - closure->from;
|
|
|
6188
|
|
|
6189 if (extent_duplicable_p (extent))
|
|
|
6190 {
|
|
|
6191 start = max (start, 0);
|
|
|
6192 end = min (end, closure->length);
|
|
|
6193
|
|
|
6194 /* Run the copy-function to give an extent the option of
|
|
|
6195 not being copied into the string (or kill ring).
|
|
|
6196 */
|
|
|
6197 if (extent_duplicable_p (extent) &&
|
|
|
6198 !run_extent_copy_function (extent, start + closure->from,
|
|
|
6199 end + closure->from))
|
|
|
6200 return 0;
|
|
|
6201 copy_extent (extent,
|
|
|
6202 string_index_char_to_byte (closure->string, start),
|
|
|
6203 string_index_char_to_byte (closure->string, end),
|
|
|
6204 closure->string);
|
|
|
6205 }
|
|
|
6206
|
|
|
6207 return 0;
|
|
|
6208 }
|
|
|
6209
|
|
428
|
6210 /* Add the extents in buffer BUF from OPOINT to OPOINT+LENGTH to
|
|
|
6211 the string STRING. */
|
|
|
6212 void
|
|
826
|
6213 add_string_extents (Lisp_Object string, struct buffer *buf, Bytexpos opoint,
|
|
428
|
6214 Bytecount length)
|
|
|
6215 {
|
|
|
6216 /* This function can GC */
|
|
|
6217 struct gcpro gcpro1, gcpro2;
|
|
|
6218 Lisp_Object buffer;
|
|
|
6219
|
|
771
|
6220 buffer = wrap_buffer (buf);
|
|
428
|
6221 GCPRO2 (buffer, string);
|
|
826
|
6222
|
|
|
6223 if (XSTRING_FORMAT (string) == BUF_FORMAT (buf))
|
|
|
6224 {
|
|
|
6225 struct add_string_extents_arg closure;
|
|
|
6226 closure.from = opoint;
|
|
|
6227 closure.length = length;
|
|
|
6228 closure.string = string;
|
|
|
6229 map_extents (opoint, opoint + length, add_string_extents_mapper,
|
|
|
6230 (void *) &closure, buffer, 0,
|
|
|
6231 /* ignore extents that just abut the region */
|
|
|
6232 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN |
|
|
|
6233 /* we are calling E-Lisp (the extent's copy function)
|
|
|
6234 so anything might happen */
|
|
|
6235 ME_MIGHT_CALL_ELISP);
|
|
|
6236 }
|
|
|
6237 else
|
|
|
6238 {
|
|
|
6239 struct add_string_extents_the_hard_way_arg closure;
|
|
|
6240 closure.from = bytebpos_to_charbpos (buf, opoint);
|
|
|
6241 closure.length = (bytebpos_to_charbpos (buf, opoint + length) -
|
|
|
6242 closure.from);
|
|
|
6243 closure.string = string;
|
|
|
6244
|
|
|
6245 /* If the string and buffer are in different formats, things get
|
|
|
6246 tricky; the only reasonable way to do the operation is entirely in
|
|
|
6247 char offsets, which are invariant to format changes. In practice,
|
|
|
6248 this won't be time-consuming because the byte/char conversions are
|
|
|
6249 mostly in the buffer, which will be in a fixed-width format. */
|
|
|
6250 map_extents (opoint, opoint + length,
|
|
|
6251 add_string_extents_the_hard_way_mapper,
|
|
|
6252 (void *) &closure, buffer, 0,
|
|
|
6253 /* ignore extents that just abut the region */
|
|
|
6254 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN |
|
|
|
6255 /* we are calling E-Lisp (the extent's copy function)
|
|
|
6256 so anything might happen */
|
|
|
6257 ME_MIGHT_CALL_ELISP);
|
|
|
6258
|
|
|
6259 }
|
|
|
6260
|
|
428
|
6261 UNGCPRO;
|
|
|
6262 }
|
|
|
6263
|
|
|
6264 struct splice_in_string_extents_arg
|
|
|
6265 {
|
|
|
6266 Bytecount pos;
|
|
|
6267 Bytecount length;
|
|
826
|
6268 Bytexpos opoint;
|
|
428
|
6269 Lisp_Object buffer;
|
|
|
6270 };
|
|
|
6271
|
|
|
6272 static int
|
|
|
6273 splice_in_string_extents_mapper (EXTENT extent, void *arg)
|
|
|
6274 {
|
|
|
6275 /* This function can GC */
|
|
|
6276 struct splice_in_string_extents_arg *closure =
|
|
|
6277 (struct splice_in_string_extents_arg *) arg;
|
|
|
6278 /* BASE_START and BASE_END are the limits in the buffer of the string
|
|
|
6279 that was just inserted.
|
|
826
|
6280
|
|
428
|
6281 NEW_START and NEW_END are the prospective buffer positions of the
|
|
|
6282 extent that is going into the buffer. */
|
|
826
|
6283 Bytexpos base_start = closure->opoint;
|
|
|
6284 Bytexpos base_end = base_start + closure->length;
|
|
|
6285 Bytexpos new_start = (base_start + extent_endpoint_byte (extent, 0) -
|
|
|
6286 closure->pos);
|
|
|
6287 Bytexpos new_end = (base_start + extent_endpoint_byte (extent, 1) -
|
|
428
|
6288 closure->pos);
|
|
|
6289
|
|
|
6290 if (new_start < base_start)
|
|
|
6291 new_start = base_start;
|
|
|
6292 if (new_end > base_end)
|
|
|
6293 new_end = base_end;
|
|
|
6294 if (new_end <= new_start)
|
|
|
6295 return 0;
|
|
|
6296
|
|
|
6297 if (!extent_duplicable_p (extent))
|
|
|
6298 return 0;
|
|
|
6299
|
|
|
6300 if (!inside_undo &&
|
|
|
6301 !run_extent_paste_function (extent, new_start, new_end,
|
|
|
6302 closure->buffer))
|
|
|
6303 return 0;
|
|
|
6304 copy_extent (extent, new_start, new_end, closure->buffer);
|
|
|
6305
|
|
|
6306 return 0;
|
|
|
6307 }
|
|
|
6308
|
|
826
|
6309 struct splice_in_string_extents_the_hard_way_arg
|
|
|
6310 {
|
|
|
6311 Charcount pos;
|
|
|
6312 Charcount length;
|
|
|
6313 Charxpos opoint;
|
|
|
6314 Lisp_Object buffer;
|
|
|
6315 };
|
|
|
6316
|
|
|
6317 static int
|
|
|
6318 splice_in_string_extents_the_hard_way_mapper (EXTENT extent, void *arg)
|
|
|
6319 {
|
|
|
6320 /* This function can GC */
|
|
|
6321 struct splice_in_string_extents_arg *closure =
|
|
|
6322 (struct splice_in_string_extents_arg *) arg;
|
|
|
6323 /* BASE_START and BASE_END are the limits in the buffer of the string
|
|
|
6324 that was just inserted.
|
|
|
6325
|
|
|
6326 NEW_START and NEW_END are the prospective buffer positions of the
|
|
|
6327 extent that is going into the buffer. */
|
|
|
6328 Charxpos base_start = closure->opoint;
|
|
|
6329 Charxpos base_end = base_start + closure->length;
|
|
|
6330 Charxpos new_start = (base_start + extent_endpoint_char (extent, 0) -
|
|
|
6331 closure->pos);
|
|
|
6332 Charxpos new_end = (base_start + extent_endpoint_char (extent, 1) -
|
|
|
6333 closure->pos);
|
|
|
6334
|
|
|
6335 if (new_start < base_start)
|
|
|
6336 new_start = base_start;
|
|
|
6337 if (new_end > base_end)
|
|
|
6338 new_end = base_end;
|
|
|
6339 if (new_end <= new_start)
|
|
|
6340 return 0;
|
|
|
6341
|
|
|
6342 if (!extent_duplicable_p (extent))
|
|
|
6343 return 0;
|
|
|
6344
|
|
|
6345 if (!inside_undo &&
|
|
|
6346 !run_extent_paste_function_char (extent, new_start, new_end,
|
|
|
6347 closure->buffer))
|
|
|
6348 return 0;
|
|
|
6349 copy_extent (extent,
|
|
|
6350 charbpos_to_bytebpos (XBUFFER (closure->buffer), new_start),
|
|
|
6351 charbpos_to_bytebpos (XBUFFER (closure->buffer), new_end),
|
|
|
6352 closure->buffer);
|
|
|
6353
|
|
|
6354 return 0;
|
|
|
6355 }
|
|
|
6356
|
|
428
|
6357 /* We have just inserted a section of STRING (starting at POS, of
|
|
|
6358 length LENGTH) into buffer BUF at OPOINT. Do whatever is necessary
|
|
|
6359 to get the string's extents into the buffer. */
|
|
|
6360
|
|
|
6361 void
|
|
|
6362 splice_in_string_extents (Lisp_Object string, struct buffer *buf,
|
|
826
|
6363 Bytexpos opoint, Bytecount length, Bytecount pos)
|
|
|
6364 {
|
|
428
|
6365 struct gcpro gcpro1, gcpro2;
|
|
793
|
6366 Lisp_Object buffer = wrap_buffer (buf);
|
|
|
6367
|
|
428
|
6368 GCPRO2 (buffer, string);
|
|
826
|
6369 if (XSTRING_FORMAT (string) == BUF_FORMAT (buf))
|
|
|
6370 {
|
|
|
6371 struct splice_in_string_extents_arg closure;
|
|
|
6372 closure.opoint = opoint;
|
|
|
6373 closure.pos = pos;
|
|
|
6374 closure.length = length;
|
|
|
6375 closure.buffer = buffer;
|
|
|
6376 map_extents (pos, pos + length,
|
|
|
6377 splice_in_string_extents_mapper,
|
|
|
6378 (void *) &closure, string, 0,
|
|
|
6379 /* ignore extents that just abut the region */
|
|
|
6380 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN |
|
|
|
6381 /* we are calling E-Lisp (the extent's copy function)
|
|
|
6382 so anything might happen */
|
|
|
6383 ME_MIGHT_CALL_ELISP);
|
|
|
6384 }
|
|
|
6385 else
|
|
|
6386 {
|
|
|
6387 struct splice_in_string_extents_the_hard_way_arg closure;
|
|
|
6388 closure.opoint = bytebpos_to_charbpos (buf, opoint);
|
|
|
6389 closure.pos = string_index_byte_to_char (string, pos);
|
|
|
6390 closure.length = string_offset_byte_to_char_len (string, pos, length);
|
|
|
6391 closure.buffer = buffer;
|
|
|
6392
|
|
|
6393 /* If the string and buffer are in different formats, things get
|
|
|
6394 tricky; the only reasonable way to do the operation is entirely in
|
|
|
6395 char offsets, which are invariant to format changes. In practice,
|
|
|
6396 this won't be time-consuming because the byte/char conversions are
|
|
|
6397 mostly in the buffer, which will be in a fixed-width format. */
|
|
|
6398 map_extents (pos, pos + length,
|
|
|
6399 splice_in_string_extents_the_hard_way_mapper,
|
|
|
6400 (void *) &closure, string, 0,
|
|
|
6401 /* ignore extents that just abut the region */
|
|
|
6402 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN |
|
|
|
6403 /* we are calling E-Lisp (the extent's copy function)
|
|
|
6404 so anything might happen */
|
|
|
6405 ME_MIGHT_CALL_ELISP);
|
|
|
6406
|
|
|
6407 }
|
|
428
|
6408 UNGCPRO;
|
|
|
6409 }
|
|
|
6410
|
|
|
6411 struct copy_string_extents_arg
|
|
|
6412 {
|
|
|
6413 Bytecount new_pos;
|
|
|
6414 Bytecount old_pos;
|
|
|
6415 Bytecount length;
|
|
|
6416 Lisp_Object new_string;
|
|
|
6417 };
|
|
|
6418
|
|
|
6419 struct copy_string_extents_1_arg
|
|
|
6420 {
|
|
|
6421 Lisp_Object parent_in_question;
|
|
|
6422 EXTENT found_extent;
|
|
|
6423 };
|
|
|
6424
|
|
|
6425 static int
|
|
|
6426 copy_string_extents_mapper (EXTENT extent, void *arg)
|
|
|
6427 {
|
|
|
6428 struct copy_string_extents_arg *closure =
|
|
|
6429 (struct copy_string_extents_arg *) arg;
|
|
|
6430 Bytecount old_start, old_end, new_start, new_end;
|
|
|
6431
|
|
826
|
6432 old_start = extent_endpoint_byte (extent, 0);
|
|
|
6433 old_end = extent_endpoint_byte (extent, 1);
|
|
428
|
6434
|
|
|
6435 old_start = max (closure->old_pos, old_start);
|
|
|
6436 old_end = min (closure->old_pos + closure->length, old_end);
|
|
|
6437
|
|
|
6438 if (old_start >= old_end)
|
|
|
6439 return 0;
|
|
|
6440
|
|
|
6441 new_start = old_start + closure->new_pos - closure->old_pos;
|
|
|
6442 new_end = old_end + closure->new_pos - closure->old_pos;
|
|
|
6443
|
|
|
6444 copy_extent (extent, new_start, new_end, closure->new_string);
|
|
|
6445 return 0;
|
|
|
6446 }
|
|
|
6447
|
|
|
6448 /* The string NEW_STRING was partially constructed from OLD_STRING.
|
|
|
6449 In particular, the section of length LEN starting at NEW_POS in
|
|
|
6450 NEW_STRING came from the section of the same length starting at
|
|
|
6451 OLD_POS in OLD_STRING. Copy the extents as appropriate. */
|
|
|
6452
|
|
|
6453 void
|
|
|
6454 copy_string_extents (Lisp_Object new_string, Lisp_Object old_string,
|
|
|
6455 Bytecount new_pos, Bytecount old_pos,
|
|
|
6456 Bytecount length)
|
|
|
6457 {
|
|
|
6458 struct copy_string_extents_arg closure;
|
|
|
6459 struct gcpro gcpro1, gcpro2;
|
|
|
6460
|
|
|
6461 closure.new_pos = new_pos;
|
|
|
6462 closure.old_pos = old_pos;
|
|
|
6463 closure.new_string = new_string;
|
|
|
6464 closure.length = length;
|
|
|
6465 GCPRO2 (new_string, old_string);
|
|
826
|
6466 map_extents (old_pos, old_pos + length,
|
|
|
6467 copy_string_extents_mapper,
|
|
|
6468 (void *) &closure, old_string, 0,
|
|
|
6469 /* ignore extents that just abut the region */
|
|
|
6470 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN |
|
|
|
6471 /* we are calling E-Lisp (the extent's copy function)
|
|
|
6472 so anything might happen */
|
|
|
6473 ME_MIGHT_CALL_ELISP);
|
|
428
|
6474 UNGCPRO;
|
|
|
6475 }
|
|
|
6476
|
|
|
6477 /* Checklist for sanity checking:
|
|
|
6478 - {kill, yank, copy} at {open, closed} {start, end} of {writable, read-only} extent
|
|
|
6479 - {kill, copy} & yank {once, repeatedly} duplicable extent in {same, different} buffer
|
|
|
6480 */
|
|
|
6481
|
|
|
6482
|
|
|
6483 /************************************************************************/
|
|
|
6484 /* text properties */
|
|
|
6485 /************************************************************************/
|
|
|
6486
|
|
|
6487 /* Text properties
|
|
|
6488 Originally this stuff was implemented in lisp (all of the functionality
|
|
|
6489 exists to make that possible) but speed was a problem.
|
|
|
6490 */
|
|
|
6491
|
|
|
6492 Lisp_Object Qtext_prop;
|
|
|
6493 Lisp_Object Qtext_prop_extent_paste_function;
|
|
|
6494
|
|
826
|
6495 /* Retrieve the value of the property PROP of the text at position POSITION
|
|
|
6496 in OBJECT. TEXT-PROPS-ONLY means only look at extents with the
|
|
|
6497 `text-prop' property, i.e. extents created by the text property
|
|
|
6498 routines. Otherwise, all extents are examined. &&#### finish Note that
|
|
|
6499 the default extent_at_flag is EXTENT_AT_DEFAULT (same as
|
|
|
6500 EXTENT_AT_AFTER). */
|
|
|
6501 Lisp_Object
|
|
|
6502 get_char_property (Bytexpos position, Lisp_Object prop,
|
|
|
6503 Lisp_Object object, enum extent_at_flag fl,
|
|
|
6504 int text_props_only)
|
|
428
|
6505 {
|
|
|
6506 Lisp_Object extent;
|
|
|
6507
|
|
|
6508 /* text_props_only specifies whether we only consider text-property
|
|
|
6509 extents (those with the 'text-prop property set) or all extents. */
|
|
|
6510 if (!text_props_only)
|
|
826
|
6511 extent = extent_at (position, object, prop, 0, fl, 0);
|
|
428
|
6512 else
|
|
|
6513 {
|
|
|
6514 EXTENT prior = 0;
|
|
|
6515 while (1)
|
|
|
6516 {
|
|
826
|
6517 extent = extent_at (position, object, Qtext_prop, prior, fl, 0);
|
|
428
|
6518 if (NILP (extent))
|
|
|
6519 return Qnil;
|
|
|
6520 if (EQ (prop, Fextent_property (extent, Qtext_prop, Qnil)))
|
|
|
6521 break;
|
|
|
6522 prior = XEXTENT (extent);
|
|
|
6523 }
|
|
|
6524 }
|
|
|
6525
|
|
|
6526 if (!NILP (extent))
|
|
|
6527 return Fextent_property (extent, prop, Qnil);
|
|
|
6528 if (!NILP (Vdefault_text_properties))
|
|
|
6529 return Fplist_get (Vdefault_text_properties, prop, Qnil);
|
|
|
6530 return Qnil;
|
|
|
6531 }
|
|
|
6532
|
|
|
6533 static Lisp_Object
|
|
826
|
6534 get_char_property_char (Lisp_Object pos, Lisp_Object prop, Lisp_Object object,
|
|
|
6535 Lisp_Object at_flag, int text_props_only)
|
|
|
6536 {
|
|
|
6537 Bytexpos position;
|
|
428
|
6538 int invert = 0;
|
|
|
6539
|
|
|
6540 object = decode_buffer_or_string (object);
|
|
|
6541 position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD);
|
|
|
6542
|
|
|
6543 /* We canonicalize the start/end-open/closed properties to the
|
|
|
6544 non-default version -- "adding" the default property really
|
|
|
6545 needs to remove the non-default one. See below for more
|
|
|
6546 on this. */
|
|
|
6547 if (EQ (prop, Qstart_closed))
|
|
|
6548 {
|
|
|
6549 prop = Qstart_open;
|
|
|
6550 invert = 1;
|
|
|
6551 }
|
|
|
6552
|
|
|
6553 if (EQ (prop, Qend_open))
|
|
|
6554 {
|
|
|
6555 prop = Qend_closed;
|
|
|
6556 invert = 1;
|
|
|
6557 }
|
|
|
6558
|
|
|
6559 {
|
|
|
6560 Lisp_Object val =
|
|
826
|
6561 get_char_property (position, prop, object,
|
|
|
6562 decode_extent_at_flag (at_flag),
|
|
|
6563 text_props_only);
|
|
428
|
6564 if (invert)
|
|
|
6565 val = NILP (val) ? Qt : Qnil;
|
|
|
6566 return val;
|
|
|
6567 }
|
|
|
6568 }
|
|
|
6569
|
|
|
6570 DEFUN ("get-text-property", Fget_text_property, 2, 4, 0, /*
|
|
|
6571 Return the value of the PROP property at the given position.
|
|
|
6572 Optional arg OBJECT specifies the buffer or string to look in, and
|
|
|
6573 defaults to the current buffer.
|
|
|
6574 Optional arg AT-FLAG controls what it means for a property to be "at"
|
|
|
6575 a position, and has the same meaning as in `extent-at'.
|
|
|
6576 This examines only those properties added with `put-text-property'.
|
|
|
6577 See also `get-char-property'.
|
|
|
6578 */
|
|
|
6579 (pos, prop, object, at_flag))
|
|
|
6580 {
|
|
826
|
6581 return get_char_property_char (pos, prop, object, at_flag, 1);
|
|
428
|
6582 }
|
|
|
6583
|
|
|
6584 DEFUN ("get-char-property", Fget_char_property, 2, 4, 0, /*
|
|
|
6585 Return the value of the PROP property at the given position.
|
|
|
6586 Optional arg OBJECT specifies the buffer or string to look in, and
|
|
|
6587 defaults to the current buffer.
|
|
|
6588 Optional arg AT-FLAG controls what it means for a property to be "at"
|
|
|
6589 a position, and has the same meaning as in `extent-at'.
|
|
|
6590 This examines properties on all extents.
|
|
|
6591 See also `get-text-property'.
|
|
|
6592 */
|
|
|
6593 (pos, prop, object, at_flag))
|
|
|
6594 {
|
|
826
|
6595 return get_char_property_char (pos, prop, object, at_flag, 0);
|
|
428
|
6596 }
|
|
|
6597
|
|
|
6598 /* About start/end-open/closed:
|
|
|
6599
|
|
|
6600 These properties have to be handled specially because of their
|
|
|
6601 strange behavior. If I put the "start-open" property on a region,
|
|
|
6602 then *all* text-property extents in the region have to have their
|
|
|
6603 start be open. This is unlike all other properties, which don't
|
|
|
6604 affect the extents of text properties other than their own.
|
|
|
6605
|
|
|
6606 So:
|
|
|
6607
|
|
|
6608 1) We have to map start-closed to (not start-open) and end-open
|
|
|
6609 to (not end-closed) -- i.e. adding the default is really the
|
|
|
6610 same as remove the non-default property. It won't work, for
|
|
|
6611 example, to have both "start-open" and "start-closed" on
|
|
|
6612 the same region.
|
|
|
6613 2) Whenever we add one of these properties, we go through all
|
|
|
6614 text-property extents in the region and set the appropriate
|
|
|
6615 open/closedness on them.
|
|
|
6616 3) Whenever we change a text-property extent for a property,
|
|
|
6617 we have to make sure we set the open/closedness properly.
|
|
|
6618
|
|
|
6619 (2) and (3) together rely on, and maintain, the invariant
|
|
|
6620 that the open/closedness of text-property extents is correct
|
|
|
6621 at the beginning and end of each operation.
|
|
|
6622 */
|
|
|
6623
|
|
|
6624 struct put_text_prop_arg
|
|
|
6625 {
|
|
|
6626 Lisp_Object prop, value; /* The property and value we are storing */
|
|
826
|
6627 Bytexpos start, end; /* The region into which we are storing it */
|
|
428
|
6628 Lisp_Object object;
|
|
|
6629 Lisp_Object the_extent; /* Our chosen extent; this is used for
|
|
|
6630 communication between subsequent passes. */
|
|
|
6631 int changed_p; /* Output: whether we have modified anything */
|
|
|
6632 };
|
|
|
6633
|
|
|
6634 static int
|
|
|
6635 put_text_prop_mapper (EXTENT e, void *arg)
|
|
|
6636 {
|
|
|
6637 struct put_text_prop_arg *closure = (struct put_text_prop_arg *) arg;
|
|
|
6638
|
|
|
6639 Lisp_Object object = closure->object;
|
|
|
6640 Lisp_Object value = closure->value;
|
|
826
|
6641 Bytexpos e_start, e_end;
|
|
|
6642 Bytexpos start = closure->start;
|
|
|
6643 Bytexpos end = closure->end;
|
|
428
|
6644 Lisp_Object extent, e_val;
|
|
|
6645 int is_eq;
|
|
|
6646
|
|
793
|
6647 extent = wrap_extent (e);
|
|
428
|
6648
|
|
|
6649 /* Note: in some cases when the property itself is 'start-open
|
|
|
6650 or 'end-closed, the checks to set the openness may do a bit
|
|
|
6651 of extra work; but it won't hurt because we then fix up the
|
|
|
6652 openness later on in put_text_prop_openness_mapper(). */
|
|
|
6653 if (!EQ (Fextent_property (extent, Qtext_prop, Qnil), closure->prop))
|
|
|
6654 /* It's not for this property; do nothing. */
|
|
|
6655 return 0;
|
|
|
6656
|
|
826
|
6657 e_start = extent_endpoint_byte (e, 0);
|
|
|
6658 e_end = extent_endpoint_byte (e, 1);
|
|
428
|
6659 e_val = Fextent_property (extent, closure->prop, Qnil);
|
|
|
6660 is_eq = EQ (value, e_val);
|
|
|
6661
|
|
|
6662 if (!NILP (value) && NILP (closure->the_extent) && is_eq)
|
|
|
6663 {
|
|
|
6664 /* We want there to be an extent here at the end, and we haven't picked
|
|
|
6665 one yet, so use this one. Extend it as necessary. We only reuse an
|
|
|
6666 extent which has an EQ value for the prop in question to avoid
|
|
|
6667 side-effecting the kill ring (that is, we never change the property
|
|
|
6668 on an extent after it has been created.)
|
|
|
6669 */
|
|
|
6670 if (e_start != start || e_end != end)
|
|
|
6671 {
|
|
826
|
6672 Bytexpos new_start = min (e_start, start);
|
|
|
6673 Bytexpos new_end = max (e_end, end);
|
|
428
|
6674 set_extent_endpoints (e, new_start, new_end, Qnil);
|
|
|
6675 /* If we changed the endpoint, then we need to set its
|
|
|
6676 openness. */
|
|
|
6677 set_extent_openness (e, new_start != e_start
|
|
826
|
6678 ? !NILP (get_char_property
|
|
428
|
6679 (start, Qstart_open, object,
|
|
|
6680 EXTENT_AT_AFTER, 1)) : -1,
|
|
|
6681 new_end != e_end
|
|
826
|
6682 ? NILP (get_char_property
|
|
|
6683 (prev_bytexpos (object, end),
|
|
|
6684 Qend_closed, object,
|
|
428
|
6685 EXTENT_AT_AFTER, 1))
|
|
|
6686 : -1);
|
|
|
6687 closure->changed_p = 1;
|
|
|
6688 }
|
|
|
6689 closure->the_extent = extent;
|
|
|
6690 }
|
|
|
6691
|
|
|
6692 /* Even if we're adding a prop, at this point, we want all other extents of
|
|
|
6693 this prop to go away (as now they overlap). So the theory here is that,
|
|
|
6694 when we are adding a prop to a region that has multiple (disjoint)
|
|
|
6695 occurrences of that prop in it already, we pick one of those and extend
|
|
|
6696 it, and remove the others.
|
|
|
6697 */
|
|
|
6698
|
|
|
6699 else if (EQ (extent, closure->the_extent))
|
|
|
6700 {
|
|
|
6701 /* just in case map-extents hits it again (does that happen?) */
|
|
|
6702 ;
|
|
|
6703 }
|
|
|
6704 else if (e_start >= start && e_end <= end)
|
|
|
6705 {
|
|
|
6706 /* Extent is contained in region; remove it. Don't destroy or modify
|
|
|
6707 it, because we don't want to change the attributes pointed to by the
|
|
|
6708 duplicates in the kill ring.
|
|
|
6709 */
|
|
|
6710 extent_detach (e);
|
|
|
6711 closure->changed_p = 1;
|
|
|
6712 }
|
|
|
6713 else if (!NILP (closure->the_extent) &&
|
|
|
6714 is_eq &&
|
|
|
6715 e_start <= end &&
|
|
|
6716 e_end >= start)
|
|
|
6717 {
|
|
|
6718 EXTENT te = XEXTENT (closure->the_extent);
|
|
|
6719 /* This extent overlaps, and has the same prop/value as the extent we've
|
|
|
6720 decided to reuse, so we can remove this existing extent as well (the
|
|
|
6721 whole thing, even the part outside of the region) and extend
|
|
|
6722 the-extent to cover it, resulting in the minimum number of extents in
|
|
|
6723 the buffer.
|
|
|
6724 */
|
|
826
|
6725 Bytexpos the_start = extent_endpoint_byte (te, 0);
|
|
|
6726 Bytexpos the_end = extent_endpoint_byte (te, 1);
|
|
428
|
6727 if (e_start != the_start && /* note AND not OR -- hmm, why is this
|
|
|
6728 the case? I think it's because the
|
|
|
6729 assumption that the text-property
|
|
|
6730 extents don't overlap makes it
|
|
|
6731 OK; changing it to an OR would
|
|
|
6732 result in changed_p sometimes getting
|
|
|
6733 falsely marked. Is this bad? */
|
|
|
6734 e_end != the_end)
|
|
|
6735 {
|
|
826
|
6736 Bytexpos new_start = min (e_start, the_start);
|
|
|
6737 Bytexpos new_end = max (e_end, the_end);
|
|
428
|
6738 set_extent_endpoints (te, new_start, new_end, Qnil);
|
|
|
6739 /* If we changed the endpoint, then we need to set its
|
|
|
6740 openness. We are setting the endpoint to be the same as
|
|
|
6741 that of the extent we're about to remove, and we assume
|
|
|
6742 (the invariant mentioned above) that extent has the
|
|
|
6743 proper endpoint setting, so we just use it. */
|
|
|
6744 set_extent_openness (te, new_start != e_start ?
|
|
|
6745 (int) extent_start_open_p (e) : -1,
|
|
|
6746 new_end != e_end ?
|
|
|
6747 (int) extent_end_open_p (e) : -1);
|
|
|
6748 closure->changed_p = 1;
|
|
|
6749 }
|
|
|
6750 extent_detach (e);
|
|
|
6751 }
|
|
|
6752 else if (e_end <= end)
|
|
|
6753 {
|
|
|
6754 /* Extent begins before start but ends before end, so we can just
|
|
|
6755 decrease its end position.
|
|
|
6756 */
|
|
|
6757 if (e_end != start)
|
|
|
6758 {
|
|
|
6759 set_extent_endpoints (e, e_start, start, Qnil);
|
|
826
|
6760 set_extent_openness (e, -1,
|
|
|
6761 NILP (get_char_property
|
|
|
6762 (prev_bytexpos (object, start),
|
|
|
6763 Qend_closed, object,
|
|
|
6764 EXTENT_AT_AFTER, 1)));
|
|
428
|
6765 closure->changed_p = 1;
|
|
|
6766 }
|
|
|
6767 }
|
|
|
6768 else if (e_start >= start)
|
|
|
6769 {
|
|
|
6770 /* Extent ends after end but begins after start, so we can just
|
|
|
6771 increase its start position.
|
|
|
6772 */
|
|
|
6773 if (e_start != end)
|
|
|
6774 {
|
|
|
6775 set_extent_endpoints (e, end, e_end, Qnil);
|
|
826
|
6776 set_extent_openness (e, !NILP (get_char_property
|
|
428
|
6777 (end, Qstart_open, object,
|
|
|
6778 EXTENT_AT_AFTER, 1)), -1);
|
|
|
6779 closure->changed_p = 1;
|
|
|
6780 }
|
|
|
6781 }
|
|
|
6782 else
|
|
|
6783 {
|
|
|
6784 /* Otherwise, `extent' straddles the region. We need to split it.
|
|
|
6785 */
|
|
|
6786 set_extent_endpoints (e, e_start, start, Qnil);
|
|
826
|
6787 set_extent_openness (e, -1, NILP (get_char_property
|
|
|
6788 (prev_bytexpos (object, start),
|
|
|
6789 Qend_closed, object,
|
|
428
|
6790 EXTENT_AT_AFTER, 1)));
|
|
|
6791 set_extent_openness (copy_extent (e, end, e_end, extent_object (e)),
|
|
826
|
6792 !NILP (get_char_property
|
|
428
|
6793 (end, Qstart_open, object,
|
|
|
6794 EXTENT_AT_AFTER, 1)), -1);
|
|
|
6795 closure->changed_p = 1;
|
|
|
6796 }
|
|
|
6797
|
|
|
6798 return 0; /* to continue mapping. */
|
|
|
6799 }
|
|
|
6800
|
|
|
6801 static int
|
|
|
6802 put_text_prop_openness_mapper (EXTENT e, void *arg)
|
|
|
6803 {
|
|
|
6804 struct put_text_prop_arg *closure = (struct put_text_prop_arg *) arg;
|
|
826
|
6805 Bytexpos e_start, e_end;
|
|
|
6806 Bytexpos start = closure->start;
|
|
|
6807 Bytexpos end = closure->end;
|
|
793
|
6808 Lisp_Object extent = wrap_extent (e);
|
|
|
6809
|
|
826
|
6810 e_start = extent_endpoint_byte (e, 0);
|
|
|
6811 e_end = extent_endpoint_byte (e, 1);
|
|
428
|
6812
|
|
|
6813 if (NILP (Fextent_property (extent, Qtext_prop, Qnil)))
|
|
|
6814 {
|
|
|
6815 /* It's not a text-property extent; do nothing. */
|
|
|
6816 ;
|
|
|
6817 }
|
|
|
6818 /* Note end conditions and NILP/!NILP's carefully. */
|
|
|
6819 else if (EQ (closure->prop, Qstart_open)
|
|
|
6820 && e_start >= start && e_start < end)
|
|
|
6821 set_extent_openness (e, !NILP (closure->value), -1);
|
|
|
6822 else if (EQ (closure->prop, Qend_closed)
|
|
|
6823 && e_end > start && e_end <= end)
|
|
|
6824 set_extent_openness (e, -1, NILP (closure->value));
|
|
|
6825
|
|
|
6826 return 0; /* to continue mapping. */
|
|
|
6827 }
|
|
|
6828
|
|
|
6829 static int
|
|
826
|
6830 put_text_prop (Bytexpos start, Bytexpos end, Lisp_Object object,
|
|
428
|
6831 Lisp_Object prop, Lisp_Object value,
|
|
|
6832 int duplicable_p)
|
|
|
6833 {
|
|
|
6834 /* This function can GC */
|
|
|
6835 struct put_text_prop_arg closure;
|
|
|
6836
|
|
|
6837 if (start == end) /* There are no characters in the region. */
|
|
|
6838 return 0;
|
|
|
6839
|
|
|
6840 /* convert to the non-default versions, since a nil property is
|
|
|
6841 the same as it not being present. */
|
|
|
6842 if (EQ (prop, Qstart_closed))
|
|
|
6843 {
|
|
|
6844 prop = Qstart_open;
|
|
|
6845 value = NILP (value) ? Qt : Qnil;
|
|
|
6846 }
|
|
|
6847 else if (EQ (prop, Qend_open))
|
|
|
6848 {
|
|
|
6849 prop = Qend_closed;
|
|
|
6850 value = NILP (value) ? Qt : Qnil;
|
|
|
6851 }
|
|
|
6852
|
|
|
6853 value = canonicalize_extent_property (prop, value);
|
|
|
6854
|
|
|
6855 closure.prop = prop;
|
|
|
6856 closure.value = value;
|
|
|
6857 closure.start = start;
|
|
|
6858 closure.end = end;
|
|
|
6859 closure.object = object;
|
|
|
6860 closure.changed_p = 0;
|
|
|
6861 closure.the_extent = Qnil;
|
|
|
6862
|
|
826
|
6863 map_extents (start, end,
|
|
|
6864 put_text_prop_mapper,
|
|
|
6865 (void *) &closure, object, 0,
|
|
|
6866 /* get all extents that abut the region */
|
|
|
6867 ME_ALL_EXTENTS_CLOSED | ME_END_CLOSED |
|
|
|
6868 #if 0
|
|
|
6869 /* it might move the SOE because the callback function calls
|
|
|
6870 get_char_property(), which calls extent_at(), which calls
|
|
|
6871 map_extents()
|
|
|
6872
|
|
|
6873 #### this was comment out before, and nothing seemed broken;
|
|
|
6874 #### but when I added the above comment and uncommented it,
|
|
|
6875 #### text property operations (e.g. font-lock) suddenly
|
|
|
6876 #### became *WAY* slow, and dominated font-lock, when a
|
|
|
6877 #### single extent spanning the entire buffer
|
|
|
6878 #### existed. --ben */
|
|
|
6879 ME_MIGHT_MOVE_SOE |
|
|
|
6880 #endif
|
|
|
6881 /* it might QUIT or error if the user has
|
|
|
6882 fucked with the extent plist. */
|
|
|
6883 ME_MIGHT_THROW |
|
|
|
6884 ME_MIGHT_MODIFY_EXTENTS);
|
|
428
|
6885
|
|
|
6886 /* If we made it through the loop without reusing an extent
|
|
|
6887 (and we want there to be one) make it now.
|
|
|
6888 */
|
|
|
6889 if (!NILP (value) && NILP (closure.the_extent))
|
|
|
6890 {
|
|
826
|
6891 Lisp_Object extent =
|
|
|
6892 wrap_extent (make_extent (object, start, end));
|
|
793
|
6893
|
|
428
|
6894 closure.changed_p = 1;
|
|
|
6895 Fset_extent_property (extent, Qtext_prop, prop);
|
|
|
6896 Fset_extent_property (extent, prop, value);
|
|
|
6897 if (duplicable_p)
|
|
|
6898 {
|
|
|
6899 extent_duplicable_p (XEXTENT (extent)) = 1;
|
|
|
6900 Fset_extent_property (extent, Qpaste_function,
|
|
|
6901 Qtext_prop_extent_paste_function);
|
|
|
6902 }
|
|
|
6903 set_extent_openness (XEXTENT (extent),
|
|
826
|
6904 !NILP (get_char_property
|
|
428
|
6905 (start, Qstart_open, object,
|
|
|
6906 EXTENT_AT_AFTER, 1)),
|
|
826
|
6907 NILP (get_char_property
|
|
|
6908 (prev_bytexpos (object, end),
|
|
|
6909 Qend_closed, object,
|
|
428
|
6910 EXTENT_AT_AFTER, 1)));
|
|
|
6911 }
|
|
|
6912
|
|
|
6913 if (EQ (prop, Qstart_open) || EQ (prop, Qend_closed))
|
|
|
6914 {
|
|
826
|
6915 map_extents (start, end, put_text_prop_openness_mapper,
|
|
|
6916 (void *) &closure, object, 0,
|
|
|
6917 /* get all extents that abut the region */
|
|
|
6918 ME_ALL_EXTENTS_CLOSED | ME_END_CLOSED |
|
|
|
6919 ME_MIGHT_MODIFY_EXTENTS);
|
|
428
|
6920 }
|
|
|
6921
|
|
|
6922 return closure.changed_p;
|
|
|
6923 }
|
|
|
6924
|
|
|
6925 DEFUN ("put-text-property", Fput_text_property, 4, 5, 0, /*
|
|
|
6926 Adds the given property/value to all characters in the specified region.
|
|
|
6927 The property is conceptually attached to the characters rather than the
|
|
|
6928 region. The properties are copied when the characters are copied/pasted.
|
|
|
6929 Fifth argument OBJECT is the buffer or string containing the text, and
|
|
|
6930 defaults to the current buffer.
|
|
|
6931 */
|
|
|
6932 (start, end, prop, value, object))
|
|
|
6933 {
|
|
|
6934 /* This function can GC */
|
|
826
|
6935 Bytexpos s, e;
|
|
428
|
6936
|
|
|
6937 object = decode_buffer_or_string (object);
|
|
|
6938 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
6939 put_text_prop (s, e, object, prop, value, 1);
|
|
|
6940 return prop;
|
|
|
6941 }
|
|
|
6942
|
|
|
6943 DEFUN ("put-nonduplicable-text-property", Fput_nonduplicable_text_property,
|
|
|
6944 4, 5, 0, /*
|
|
|
6945 Adds the given property/value to all characters in the specified region.
|
|
|
6946 The property is conceptually attached to the characters rather than the
|
|
|
6947 region, however the properties will not be copied when the characters
|
|
|
6948 are copied.
|
|
|
6949 Fifth argument OBJECT is the buffer or string containing the text, and
|
|
|
6950 defaults to the current buffer.
|
|
|
6951 */
|
|
|
6952 (start, end, prop, value, object))
|
|
|
6953 {
|
|
|
6954 /* This function can GC */
|
|
826
|
6955 Bytexpos s, e;
|
|
428
|
6956
|
|
|
6957 object = decode_buffer_or_string (object);
|
|
|
6958 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
6959 put_text_prop (s, e, object, prop, value, 0);
|
|
|
6960 return prop;
|
|
|
6961 }
|
|
|
6962
|
|
|
6963 DEFUN ("add-text-properties", Fadd_text_properties, 3, 4, 0, /*
|
|
|
6964 Add properties to the characters from START to END.
|
|
|
6965 The third argument PROPS is a property list specifying the property values
|
|
|
6966 to add. The optional fourth argument, OBJECT, is the buffer or string
|
|
|
6967 containing the text and defaults to the current buffer. Returns t if
|
|
|
6968 any property was changed, nil otherwise.
|
|
|
6969 */
|
|
|
6970 (start, end, props, object))
|
|
|
6971 {
|
|
|
6972 /* This function can GC */
|
|
|
6973 int changed = 0;
|
|
826
|
6974 Bytexpos s, e;
|
|
428
|
6975
|
|
|
6976 object = decode_buffer_or_string (object);
|
|
|
6977 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
6978 CHECK_LIST (props);
|
|
|
6979 for (; !NILP (props); props = Fcdr (Fcdr (props)))
|
|
|
6980 {
|
|
|
6981 Lisp_Object prop = XCAR (props);
|
|
|
6982 Lisp_Object value = Fcar (XCDR (props));
|
|
|
6983 changed |= put_text_prop (s, e, object, prop, value, 1);
|
|
|
6984 }
|
|
|
6985 return changed ? Qt : Qnil;
|
|
|
6986 }
|
|
|
6987
|
|
|
6988
|
|
|
6989 DEFUN ("add-nonduplicable-text-properties", Fadd_nonduplicable_text_properties,
|
|
|
6990 3, 4, 0, /*
|
|
|
6991 Add nonduplicable properties to the characters from START to END.
|
|
|
6992 \(The properties will not be copied when the characters are copied.)
|
|
|
6993 The third argument PROPS is a property list specifying the property values
|
|
|
6994 to add. The optional fourth argument, OBJECT, is the buffer or string
|
|
|
6995 containing the text and defaults to the current buffer. Returns t if
|
|
|
6996 any property was changed, nil otherwise.
|
|
|
6997 */
|
|
|
6998 (start, end, props, object))
|
|
|
6999 {
|
|
|
7000 /* This function can GC */
|
|
|
7001 int changed = 0;
|
|
826
|
7002 Bytexpos s, e;
|
|
428
|
7003
|
|
|
7004 object = decode_buffer_or_string (object);
|
|
|
7005 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
7006 CHECK_LIST (props);
|
|
|
7007 for (; !NILP (props); props = Fcdr (Fcdr (props)))
|
|
|
7008 {
|
|
|
7009 Lisp_Object prop = XCAR (props);
|
|
|
7010 Lisp_Object value = Fcar (XCDR (props));
|
|
|
7011 changed |= put_text_prop (s, e, object, prop, value, 0);
|
|
|
7012 }
|
|
|
7013 return changed ? Qt : Qnil;
|
|
|
7014 }
|
|
|
7015
|
|
|
7016 DEFUN ("remove-text-properties", Fremove_text_properties, 3, 4, 0, /*
|
|
|
7017 Remove the given properties from all characters in the specified region.
|
|
|
7018 PROPS should be a plist, but the values in that plist are ignored (treated
|
|
|
7019 as nil). Returns t if any property was changed, nil otherwise.
|
|
|
7020 Fourth argument OBJECT is the buffer or string containing the text, and
|
|
|
7021 defaults to the current buffer.
|
|
|
7022 */
|
|
|
7023 (start, end, props, object))
|
|
|
7024 {
|
|
|
7025 /* This function can GC */
|
|
|
7026 int changed = 0;
|
|
826
|
7027 Bytexpos s, e;
|
|
428
|
7028
|
|
|
7029 object = decode_buffer_or_string (object);
|
|
|
7030 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
7031 CHECK_LIST (props);
|
|
|
7032 for (; !NILP (props); props = Fcdr (Fcdr (props)))
|
|
|
7033 {
|
|
|
7034 Lisp_Object prop = XCAR (props);
|
|
|
7035 changed |= put_text_prop (s, e, object, prop, Qnil, 1);
|
|
|
7036 }
|
|
|
7037 return changed ? Qt : Qnil;
|
|
|
7038 }
|
|
|
7039
|
|
|
7040 /* Whenever a text-prop extent is pasted into a buffer (via `yank' or `insert'
|
|
|
7041 or whatever) we attach the properties to the buffer by calling
|
|
|
7042 `put-text-property' instead of by simply allowing the extent to be copied or
|
|
|
7043 re-attached. Then we return nil, telling the extents code not to attach it
|
|
|
7044 again. By handing the insertion hackery in this way, we make kill/yank
|
|
|
7045 behave consistently with put-text-property and not fragment the extents
|
|
|
7046 (since text-prop extents must partition, not overlap).
|
|
|
7047
|
|
|
7048 The lisp implementation of this was probably fast enough, but since I moved
|
|
|
7049 the rest of the put-text-prop code here, I moved this as well for
|
|
|
7050 completeness.
|
|
|
7051 */
|
|
|
7052 DEFUN ("text-prop-extent-paste-function", Ftext_prop_extent_paste_function,
|
|
|
7053 3, 3, 0, /*
|
|
|
7054 Used as the `paste-function' property of `text-prop' extents.
|
|
|
7055 */
|
|
|
7056 (extent, from, to))
|
|
|
7057 {
|
|
|
7058 /* This function can GC */
|
|
|
7059 Lisp_Object prop, val;
|
|
|
7060
|
|
|
7061 prop = Fextent_property (extent, Qtext_prop, Qnil);
|
|
|
7062 if (NILP (prop))
|
|
563
|
7063 signal_error (Qinternal_error,
|
|
442
|
7064 "Internal error: no text-prop", extent);
|
|
428
|
7065 val = Fextent_property (extent, prop, Qnil);
|
|
|
7066 #if 0
|
|
|
7067 /* removed by bill perry, 2/9/97
|
|
|
7068 ** This little bit of code would not allow you to have a text property
|
|
|
7069 ** with a value of Qnil. This is bad bad bad.
|
|
|
7070 */
|
|
|
7071 if (NILP (val))
|
|
563
|
7072 signal_error_2 (Qinternal_error,
|
|
442
|
7073 "Internal error: no text-prop",
|
|
|
7074 extent, prop);
|
|
428
|
7075 #endif
|
|
|
7076 Fput_text_property (from, to, prop, val, Qnil);
|
|
|
7077 return Qnil; /* important! */
|
|
|
7078 }
|
|
|
7079
|
|
826
|
7080 Bytexpos
|
|
|
7081 next_single_property_change (Bytexpos pos, Lisp_Object prop,
|
|
|
7082 Lisp_Object object, Bytexpos limit)
|
|
|
7083 {
|
|
|
7084 Lisp_Object extent, value;
|
|
|
7085 int limit_was_nil;
|
|
|
7086
|
|
|
7087 if (limit < 0)
|
|
|
7088 {
|
|
|
7089 limit = buffer_or_string_accessible_end_byte (object);
|
|
|
7090 limit_was_nil = 1;
|
|
|
7091 }
|
|
|
7092 else
|
|
|
7093 limit_was_nil = 0;
|
|
|
7094
|
|
|
7095 extent = extent_at (pos, object, prop, 0, EXTENT_AT_AFTER, 0);
|
|
|
7096 if (!NILP (extent))
|
|
|
7097 value = Fextent_property (extent, prop, Qnil);
|
|
|
7098 else
|
|
|
7099 value = Qnil;
|
|
|
7100
|
|
|
7101 while (1)
|
|
|
7102 {
|
|
|
7103 pos = extent_find_end_of_run (object, pos, 1);
|
|
|
7104 if (pos >= limit)
|
|
|
7105 break; /* property is the same all the way to the end */
|
|
|
7106 extent = extent_at (pos, object, prop, 0, EXTENT_AT_AFTER, 0);
|
|
|
7107 if ((NILP (extent) && !NILP (value)) ||
|
|
|
7108 (!NILP (extent) && !EQ (value,
|
|
|
7109 Fextent_property (extent, prop, Qnil))))
|
|
|
7110 return pos;
|
|
|
7111 }
|
|
|
7112
|
|
|
7113 if (limit_was_nil)
|
|
|
7114 return -1;
|
|
|
7115 else
|
|
|
7116 return limit;
|
|
|
7117 }
|
|
|
7118
|
|
|
7119 Bytexpos
|
|
|
7120 previous_single_property_change (Bytexpos pos, Lisp_Object prop,
|
|
|
7121 Lisp_Object object, Bytexpos limit)
|
|
|
7122 {
|
|
|
7123 Lisp_Object extent, value;
|
|
|
7124 int limit_was_nil;
|
|
|
7125
|
|
|
7126 if (limit < 0)
|
|
|
7127 {
|
|
|
7128 limit = buffer_or_string_accessible_begin_byte (object);
|
|
|
7129 limit_was_nil = 1;
|
|
|
7130 }
|
|
|
7131 else
|
|
|
7132 limit_was_nil = 0;
|
|
|
7133
|
|
|
7134 extent = extent_at (pos, object, prop, 0, EXTENT_AT_BEFORE, 0);
|
|
|
7135 if (!NILP (extent))
|
|
|
7136 value = Fextent_property (extent, prop, Qnil);
|
|
|
7137 else
|
|
|
7138 value = Qnil;
|
|
|
7139
|
|
|
7140 while (1)
|
|
|
7141 {
|
|
|
7142 pos = extent_find_beginning_of_run (object, pos, 1);
|
|
|
7143 if (pos <= limit)
|
|
|
7144 break; /* property is the same all the way to the end */
|
|
|
7145 extent = extent_at (pos, object, prop, 0, EXTENT_AT_BEFORE, 0);
|
|
|
7146 if ((NILP (extent) && !NILP (value)) ||
|
|
|
7147 (!NILP (extent) && !EQ (value,
|
|
|
7148 Fextent_property (extent, prop, Qnil))))
|
|
|
7149 return pos;
|
|
|
7150 }
|
|
|
7151
|
|
|
7152 if (limit_was_nil)
|
|
|
7153 return -1;
|
|
|
7154 else
|
|
|
7155 return limit;
|
|
|
7156 }
|
|
428
|
7157
|
|
|
7158 DEFUN ("next-single-property-change", Fnext_single_property_change,
|
|
|
7159 2, 4, 0, /*
|
|
|
7160 Return the position of next property change for a specific property.
|
|
|
7161 Scans characters forward from POS till it finds a change in the PROP
|
|
|
7162 property, then returns the position of the change. The optional third
|
|
|
7163 argument OBJECT is the buffer or string to scan (defaults to the current
|
|
|
7164 buffer).
|
|
|
7165 The property values are compared with `eq'.
|
|
444
|
7166 Return nil if the property is constant all the way to the end of OBJECT.
|
|
428
|
7167 If the value is non-nil, it is a position greater than POS, never equal.
|
|
|
7168
|
|
|
7169 If the optional fourth argument LIMIT is non-nil, don't search
|
|
|
7170 past position LIMIT; return LIMIT if nothing is found before LIMIT.
|
|
|
7171 If two or more extents with conflicting non-nil values for PROP overlap
|
|
|
7172 a particular character, it is undefined which value is considered to be
|
|
|
7173 the value of PROP. (Note that this situation will not happen if you always
|
|
|
7174 use the text-property primitives.)
|
|
|
7175 */
|
|
|
7176 (pos, prop, object, limit))
|
|
|
7177 {
|
|
826
|
7178 Bytexpos xpos;
|
|
|
7179 Bytexpos blim;
|
|
428
|
7180
|
|
|
7181 object = decode_buffer_or_string (object);
|
|
826
|
7182 xpos = get_buffer_or_string_pos_byte (object, pos, 0);
|
|
|
7183 blim = !NILP (limit) ? get_buffer_or_string_pos_byte (object, limit, 0) : -1;
|
|
|
7184
|
|
|
7185 blim = next_single_property_change (xpos, prop, object, blim);
|
|
|
7186
|
|
|
7187 if (blim < 0)
|
|
428
|
7188 return Qnil;
|
|
|
7189 else
|
|
826
|
7190 return make_int (buffer_or_string_bytexpos_to_charxpos (object, blim));
|
|
|
7191 }
|
|
428
|
7192
|
|
|
7193 DEFUN ("previous-single-property-change", Fprevious_single_property_change,
|
|
|
7194 2, 4, 0, /*
|
|
|
7195 Return the position of next property change for a specific property.
|
|
|
7196 Scans characters backward from POS till it finds a change in the PROP
|
|
|
7197 property, then returns the position of the change. The optional third
|
|
|
7198 argument OBJECT is the buffer or string to scan (defaults to the current
|
|
|
7199 buffer).
|
|
|
7200 The property values are compared with `eq'.
|
|
444
|
7201 Return nil if the property is constant all the way to the start of OBJECT.
|
|
428
|
7202 If the value is non-nil, it is a position less than POS, never equal.
|
|
|
7203
|
|
|
7204 If the optional fourth argument LIMIT is non-nil, don't search back
|
|
|
7205 past position LIMIT; return LIMIT if nothing is found until LIMIT.
|
|
|
7206 If two or more extents with conflicting non-nil values for PROP overlap
|
|
|
7207 a particular character, it is undefined which value is considered to be
|
|
|
7208 the value of PROP. (Note that this situation will not happen if you always
|
|
|
7209 use the text-property primitives.)
|
|
|
7210 */
|
|
|
7211 (pos, prop, object, limit))
|
|
|
7212 {
|
|
826
|
7213 Bytexpos xpos;
|
|
|
7214 Bytexpos blim;
|
|
428
|
7215
|
|
|
7216 object = decode_buffer_or_string (object);
|
|
826
|
7217 xpos = get_buffer_or_string_pos_byte (object, pos, 0);
|
|
|
7218 blim = !NILP (limit) ? get_buffer_or_string_pos_byte (object, limit, 0) : -1;
|
|
|
7219
|
|
|
7220 blim = previous_single_property_change (xpos, prop, object, blim);
|
|
|
7221
|
|
|
7222 if (blim < 0)
|
|
428
|
7223 return Qnil;
|
|
|
7224 else
|
|
826
|
7225 return make_int (buffer_or_string_bytexpos_to_charxpos (object, blim));
|
|
428
|
7226 }
|
|
|
7227
|
|
|
7228 #ifdef MEMORY_USAGE_STATS
|
|
|
7229
|
|
|
7230 int
|
|
|
7231 compute_buffer_extent_usage (struct buffer *b, struct overhead_stats *ovstats)
|
|
|
7232 {
|
|
|
7233 /* #### not yet written */
|
|
|
7234 return 0;
|
|
|
7235 }
|
|
|
7236
|
|
|
7237 #endif /* MEMORY_USAGE_STATS */
|
|
|
7238
|
|
|
7239
|
|
|
7240 /************************************************************************/
|
|
|
7241 /* initialization */
|
|
|
7242 /************************************************************************/
|
|
|
7243
|
|
|
7244 void
|
|
|
7245 syms_of_extents (void)
|
|
|
7246 {
|
|
442
|
7247 INIT_LRECORD_IMPLEMENTATION (extent);
|
|
|
7248 INIT_LRECORD_IMPLEMENTATION (extent_info);
|
|
|
7249 INIT_LRECORD_IMPLEMENTATION (extent_auxiliary);
|
|
|
7250
|
|
563
|
7251 DEFSYMBOL (Qextentp);
|
|
|
7252 DEFSYMBOL (Qextent_live_p);
|
|
|
7253
|
|
|
7254 DEFSYMBOL (Qall_extents_closed);
|
|
|
7255 DEFSYMBOL (Qall_extents_open);
|
|
|
7256 DEFSYMBOL (Qall_extents_closed_open);
|
|
|
7257 DEFSYMBOL (Qall_extents_open_closed);
|
|
|
7258 DEFSYMBOL (Qstart_in_region);
|
|
|
7259 DEFSYMBOL (Qend_in_region);
|
|
|
7260 DEFSYMBOL (Qstart_and_end_in_region);
|
|
|
7261 DEFSYMBOL (Qstart_or_end_in_region);
|
|
|
7262 DEFSYMBOL (Qnegate_in_region);
|
|
|
7263
|
|
|
7264 DEFSYMBOL (Qdetached);
|
|
|
7265 DEFSYMBOL (Qdestroyed);
|
|
|
7266 DEFSYMBOL (Qbegin_glyph);
|
|
|
7267 DEFSYMBOL (Qend_glyph);
|
|
|
7268 DEFSYMBOL (Qstart_open);
|
|
|
7269 DEFSYMBOL (Qend_open);
|
|
|
7270 DEFSYMBOL (Qstart_closed);
|
|
|
7271 DEFSYMBOL (Qend_closed);
|
|
|
7272 DEFSYMBOL (Qread_only);
|
|
|
7273 /* DEFSYMBOL (Qhighlight); in faces.c */
|
|
|
7274 DEFSYMBOL (Qunique);
|
|
|
7275 DEFSYMBOL (Qduplicable);
|
|
|
7276 DEFSYMBOL (Qdetachable);
|
|
|
7277 DEFSYMBOL (Qpriority);
|
|
|
7278 DEFSYMBOL (Qmouse_face);
|
|
|
7279 DEFSYMBOL (Qinitial_redisplay_function);
|
|
|
7280
|
|
|
7281
|
|
|
7282 DEFSYMBOL (Qglyph_layout); /* backwards compatibility */
|
|
|
7283 DEFSYMBOL (Qbegin_glyph_layout);
|
|
|
7284 DEFSYMBOL (Qend_glyph_layout);
|
|
|
7285 DEFSYMBOL (Qoutside_margin);
|
|
|
7286 DEFSYMBOL (Qinside_margin);
|
|
|
7287 DEFSYMBOL (Qwhitespace);
|
|
428
|
7288 /* Qtext defined in general.c */
|
|
|
7289
|
|
563
|
7290 DEFSYMBOL (Qpaste_function);
|
|
|
7291 DEFSYMBOL (Qcopy_function);
|
|
|
7292
|
|
|
7293 DEFSYMBOL (Qtext_prop);
|
|
|
7294 DEFSYMBOL (Qtext_prop_extent_paste_function);
|
|
428
|
7295
|
|
|
7296 DEFSUBR (Fextentp);
|
|
|
7297 DEFSUBR (Fextent_live_p);
|
|
|
7298 DEFSUBR (Fextent_detached_p);
|
|
|
7299 DEFSUBR (Fextent_start_position);
|
|
|
7300 DEFSUBR (Fextent_end_position);
|
|
|
7301 DEFSUBR (Fextent_object);
|
|
|
7302 DEFSUBR (Fextent_length);
|
|
|
7303
|
|
|
7304 DEFSUBR (Fmake_extent);
|
|
|
7305 DEFSUBR (Fcopy_extent);
|
|
|
7306 DEFSUBR (Fdelete_extent);
|
|
|
7307 DEFSUBR (Fdetach_extent);
|
|
|
7308 DEFSUBR (Fset_extent_endpoints);
|
|
|
7309 DEFSUBR (Fnext_extent);
|
|
|
7310 DEFSUBR (Fprevious_extent);
|
|
1204
|
7311 #ifdef DEBUG_XEMACS
|
|
428
|
7312 DEFSUBR (Fnext_e_extent);
|
|
|
7313 DEFSUBR (Fprevious_e_extent);
|
|
|
7314 #endif
|
|
|
7315 DEFSUBR (Fnext_extent_change);
|
|
|
7316 DEFSUBR (Fprevious_extent_change);
|
|
|
7317
|
|
|
7318 DEFSUBR (Fextent_parent);
|
|
|
7319 DEFSUBR (Fextent_children);
|
|
|
7320 DEFSUBR (Fset_extent_parent);
|
|
|
7321
|
|
|
7322 DEFSUBR (Fextent_in_region_p);
|
|
|
7323 DEFSUBR (Fmap_extents);
|
|
|
7324 DEFSUBR (Fmap_extent_children);
|
|
|
7325 DEFSUBR (Fextent_at);
|
|
442
|
7326 DEFSUBR (Fextents_at);
|
|
428
|
7327
|
|
|
7328 DEFSUBR (Fset_extent_initial_redisplay_function);
|
|
|
7329 DEFSUBR (Fextent_face);
|
|
|
7330 DEFSUBR (Fset_extent_face);
|
|
|
7331 DEFSUBR (Fextent_mouse_face);
|
|
|
7332 DEFSUBR (Fset_extent_mouse_face);
|
|
|
7333 DEFSUBR (Fset_extent_begin_glyph);
|
|
|
7334 DEFSUBR (Fset_extent_end_glyph);
|
|
|
7335 DEFSUBR (Fextent_begin_glyph);
|
|
|
7336 DEFSUBR (Fextent_end_glyph);
|
|
|
7337 DEFSUBR (Fset_extent_begin_glyph_layout);
|
|
|
7338 DEFSUBR (Fset_extent_end_glyph_layout);
|
|
|
7339 DEFSUBR (Fextent_begin_glyph_layout);
|
|
|
7340 DEFSUBR (Fextent_end_glyph_layout);
|
|
|
7341 DEFSUBR (Fset_extent_priority);
|
|
|
7342 DEFSUBR (Fextent_priority);
|
|
|
7343 DEFSUBR (Fset_extent_property);
|
|
|
7344 DEFSUBR (Fset_extent_properties);
|
|
|
7345 DEFSUBR (Fextent_property);
|
|
|
7346 DEFSUBR (Fextent_properties);
|
|
|
7347
|
|
|
7348 DEFSUBR (Fhighlight_extent);
|
|
|
7349 DEFSUBR (Fforce_highlight_extent);
|
|
|
7350
|
|
|
7351 DEFSUBR (Finsert_extent);
|
|
|
7352
|
|
|
7353 DEFSUBR (Fget_text_property);
|
|
|
7354 DEFSUBR (Fget_char_property);
|
|
|
7355 DEFSUBR (Fput_text_property);
|
|
|
7356 DEFSUBR (Fput_nonduplicable_text_property);
|
|
|
7357 DEFSUBR (Fadd_text_properties);
|
|
|
7358 DEFSUBR (Fadd_nonduplicable_text_properties);
|
|
|
7359 DEFSUBR (Fremove_text_properties);
|
|
|
7360 DEFSUBR (Ftext_prop_extent_paste_function);
|
|
|
7361 DEFSUBR (Fnext_single_property_change);
|
|
|
7362 DEFSUBR (Fprevious_single_property_change);
|
|
|
7363 }
|
|
|
7364
|
|
|
7365 void
|
|
|
7366 reinit_vars_of_extents (void)
|
|
|
7367 {
|
|
|
7368 extent_auxiliary_defaults.begin_glyph = Qnil;
|
|
|
7369 extent_auxiliary_defaults.end_glyph = Qnil;
|
|
|
7370 extent_auxiliary_defaults.parent = Qnil;
|
|
|
7371 extent_auxiliary_defaults.children = Qnil;
|
|
|
7372 extent_auxiliary_defaults.priority = 0;
|
|
|
7373 extent_auxiliary_defaults.invisible = Qnil;
|
|
|
7374 extent_auxiliary_defaults.read_only = Qnil;
|
|
|
7375 extent_auxiliary_defaults.mouse_face = Qnil;
|
|
|
7376 extent_auxiliary_defaults.initial_redisplay_function = Qnil;
|
|
|
7377 extent_auxiliary_defaults.before_change_functions = Qnil;
|
|
|
7378 extent_auxiliary_defaults.after_change_functions = Qnil;
|
|
|
7379 }
|
|
|
7380
|
|
|
7381 void
|
|
|
7382 vars_of_extents (void)
|
|
|
7383 {
|
|
|
7384 reinit_vars_of_extents ();
|
|
|
7385
|
|
|
7386 DEFVAR_INT ("mouse-highlight-priority", &mouse_highlight_priority /*
|
|
|
7387 The priority to use for the mouse-highlighting pseudo-extent
|
|
|
7388 that is used to highlight extents with the `mouse-face' attribute set.
|
|
|
7389 See `set-extent-priority'.
|
|
|
7390 */ );
|
|
|
7391 /* Set mouse-highlight-priority (which ends up being used both for the
|
|
|
7392 mouse-highlighting pseudo-extent and the primary selection extent)
|
|
|
7393 to a very high value because very few extents should override it.
|
|
|
7394 1000 gives lots of room below it for different-prioritized extents.
|
|
|
7395 10 doesn't. ediff, for example, likes to use priorities around 100.
|
|
|
7396 --ben */
|
|
|
7397 mouse_highlight_priority = /* 10 */ 1000;
|
|
|
7398
|
|
|
7399 DEFVAR_LISP ("default-text-properties", &Vdefault_text_properties /*
|
|
|
7400 Property list giving default values for text properties.
|
|
|
7401 Whenever a character does not specify a value for a property, the value
|
|
|
7402 stored in this list is used instead. This only applies when the
|
|
|
7403 functions `get-text-property' or `get-char-property' are called.
|
|
|
7404 */ );
|
|
|
7405 Vdefault_text_properties = Qnil;
|
|
|
7406
|
|
|
7407 staticpro (&Vlast_highlighted_extent);
|
|
|
7408 Vlast_highlighted_extent = Qnil;
|
|
|
7409
|
|
|
7410 Vextent_face_reusable_list = Fcons (Qnil, Qnil);
|
|
|
7411 staticpro (&Vextent_face_reusable_list);
|
|
771
|
7412
|
|
428
|
7413 staticpro (&Vextent_face_memoize_hash_table);
|
|
|
7414 /* The memoize hash table maps from lists of symbols to lists of
|
|
|
7415 faces. It needs to be `equal' to implement the memoization.
|
|
|
7416 The reverse table maps in the other direction and just needs
|
|
|
7417 to do `eq' comparison because the lists of faces are already
|
|
|
7418 memoized. */
|
|
|
7419 Vextent_face_memoize_hash_table =
|
|
|
7420 make_lisp_hash_table (100, HASH_TABLE_VALUE_WEAK, HASH_TABLE_EQUAL);
|
|
|
7421 staticpro (&Vextent_face_reverse_memoize_hash_table);
|
|
|
7422 Vextent_face_reverse_memoize_hash_table =
|
|
|
7423 make_lisp_hash_table (100, HASH_TABLE_KEY_WEAK, HASH_TABLE_EQ);
|
|
|
7424 }
|
