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