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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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442
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3 Copyright (c) 1995, 1996, 2000 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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268 positions" are only used internally and are of type Membpos.
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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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665
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361 Membpos 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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373 typedef int Endpoint_Index;
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374
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665
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375 #define membpos_to_startind(x, start_open) \
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428
|
376 ((Endpoint_Index) (((x) << 1) + !!(start_open)))
|
|
665
|
377 #define membpos_to_endind(x, end_open) \
|
|
428
|
378 ((Endpoint_Index) (((x) << 1) - !!(end_open)))
|
|
|
379
|
|
|
380 /* Combination macros */
|
|
665
|
381 #define bytebpos_to_startind(buf, x, start_open) \
|
|
|
382 membpos_to_startind (bytebpos_to_membpos (buf, x), start_open)
|
|
|
383 #define bytebpos_to_endind(buf, x, end_open) \
|
|
|
384 membpos_to_endind (bytebpos_to_membpos (buf, x), end_open)
|
|
428
|
385
|
|
|
386 /* ------------------------------- */
|
|
|
387 /* buffer-or-string primitives */
|
|
|
388 /* ------------------------------- */
|
|
|
389
|
|
665
|
390 /* Similar for Bytebposs and start/end indices. */
|
|
|
391
|
|
|
392 #define buffer_or_string_bytebpos_to_startind(obj, ind, start_open) \
|
|
|
393 membpos_to_startind (buffer_or_string_bytebpos_to_membpos (obj, ind), \
|
|
428
|
394 start_open)
|
|
|
395
|
|
665
|
396 #define buffer_or_string_bytebpos_to_endind(obj, ind, end_open) \
|
|
|
397 membpos_to_endind (buffer_or_string_bytebpos_to_membpos (obj, ind), \
|
|
428
|
398 end_open)
|
|
|
399
|
|
|
400 /* ------------------------------- */
|
|
|
401 /* Lisp-level functions */
|
|
|
402 /* ------------------------------- */
|
|
|
403
|
|
|
404 /* flags for decode_extent() */
|
|
|
405 #define DE_MUST_HAVE_BUFFER 1
|
|
|
406 #define DE_MUST_BE_ATTACHED 2
|
|
|
407
|
|
|
408 Lisp_Object Vlast_highlighted_extent;
|
|
458
|
409 Fixnum mouse_highlight_priority;
|
|
428
|
410
|
|
|
411 Lisp_Object Qextentp;
|
|
|
412 Lisp_Object Qextent_live_p;
|
|
|
413
|
|
|
414 Lisp_Object Qall_extents_closed;
|
|
|
415 Lisp_Object Qall_extents_open;
|
|
|
416 Lisp_Object Qall_extents_closed_open;
|
|
|
417 Lisp_Object Qall_extents_open_closed;
|
|
|
418 Lisp_Object Qstart_in_region;
|
|
|
419 Lisp_Object Qend_in_region;
|
|
|
420 Lisp_Object Qstart_and_end_in_region;
|
|
|
421 Lisp_Object Qstart_or_end_in_region;
|
|
|
422 Lisp_Object Qnegate_in_region;
|
|
|
423
|
|
|
424 Lisp_Object Qdetached;
|
|
|
425 Lisp_Object Qdestroyed;
|
|
|
426 Lisp_Object Qbegin_glyph;
|
|
|
427 Lisp_Object Qend_glyph;
|
|
|
428 Lisp_Object Qstart_open;
|
|
|
429 Lisp_Object Qend_open;
|
|
|
430 Lisp_Object Qstart_closed;
|
|
|
431 Lisp_Object Qend_closed;
|
|
|
432 Lisp_Object Qread_only;
|
|
|
433 /* Qhighlight defined in general.c */
|
|
|
434 Lisp_Object Qunique;
|
|
|
435 Lisp_Object Qduplicable;
|
|
|
436 Lisp_Object Qdetachable;
|
|
|
437 Lisp_Object Qpriority;
|
|
|
438 Lisp_Object Qmouse_face;
|
|
|
439 Lisp_Object Qinitial_redisplay_function;
|
|
|
440
|
|
|
441 Lisp_Object Qglyph_layout; /* This exists only for backwards compatibility. */
|
|
|
442 Lisp_Object Qbegin_glyph_layout, Qend_glyph_layout;
|
|
|
443 Lisp_Object Qoutside_margin;
|
|
|
444 Lisp_Object Qinside_margin;
|
|
|
445 Lisp_Object Qwhitespace;
|
|
|
446 /* Qtext defined in general.c */
|
|
|
447
|
|
|
448 Lisp_Object Qcopy_function;
|
|
|
449 Lisp_Object Qpaste_function;
|
|
|
450
|
|
|
451 /* The idea here is that if we're given a list of faces, we
|
|
|
452 need to "memoize" this so that two lists of faces that are `equal'
|
|
|
453 turn into the same object. When `set-extent-face' is called, we
|
|
|
454 "memoize" into a list of actual faces; when `extent-face' is called,
|
|
|
455 we do a reverse lookup to get the list of symbols. */
|
|
|
456
|
|
|
457 static Lisp_Object canonicalize_extent_property (Lisp_Object prop,
|
|
|
458 Lisp_Object value);
|
|
|
459 Lisp_Object Vextent_face_memoize_hash_table;
|
|
|
460 Lisp_Object Vextent_face_reverse_memoize_hash_table;
|
|
|
461 Lisp_Object Vextent_face_reusable_list;
|
|
|
462 /* FSFmacs bogosity */
|
|
|
463 Lisp_Object Vdefault_text_properties;
|
|
|
464
|
|
|
465 EXFUN (Fextent_properties, 1);
|
|
|
466 EXFUN (Fset_extent_property, 3);
|
|
|
467
|
|
442
|
468 /* if true, we don't want to set any redisplay flags on modeline extent
|
|
|
469 changes */
|
|
|
470 int in_modeline_generation;
|
|
|
471
|
|
428
|
472
|
|
|
473 /************************************************************************/
|
|
|
474 /* Generalized gap array */
|
|
|
475 /************************************************************************/
|
|
|
476
|
|
|
477 /* This generalizes the "array with a gap" model used to store buffer
|
|
|
478 characters. This is based on the stuff in insdel.c and should
|
|
|
479 probably be merged with it. This is not extent-specific and should
|
|
|
480 perhaps be moved into a separate file. */
|
|
|
481
|
|
|
482 /* ------------------------------- */
|
|
|
483 /* internal functions */
|
|
|
484 /* ------------------------------- */
|
|
|
485
|
|
|
486 /* Adjust the gap array markers in the range (FROM, TO]. Parallel to
|
|
|
487 adjust_markers() in insdel.c. */
|
|
|
488
|
|
|
489 static void
|
|
665
|
490 gap_array_adjust_markers (Gap_Array *ga, Membpos from,
|
|
|
491 Membpos to, int amount)
|
|
428
|
492 {
|
|
|
493 Gap_Array_Marker *m;
|
|
|
494
|
|
|
495 for (m = ga->markers; m; m = m->next)
|
|
|
496 m->pos = do_marker_adjustment (m->pos, from, to, amount);
|
|
|
497 }
|
|
|
498
|
|
|
499 /* Move the gap to array position POS. Parallel to move_gap() in
|
|
|
500 insdel.c but somewhat simplified. */
|
|
|
501
|
|
|
502 static void
|
|
|
503 gap_array_move_gap (Gap_Array *ga, int pos)
|
|
|
504 {
|
|
|
505 int gap = ga->gap;
|
|
|
506 int gapsize = ga->gapsize;
|
|
|
507
|
|
|
508 assert (ga->array);
|
|
|
509 if (pos < gap)
|
|
|
510 {
|
|
|
511 memmove (GAP_ARRAY_MEMEL_ADDR (ga, pos + gapsize),
|
|
|
512 GAP_ARRAY_MEMEL_ADDR (ga, pos),
|
|
|
513 (gap - pos)*ga->elsize);
|
|
665
|
514 gap_array_adjust_markers (ga, (Membpos) pos, (Membpos) gap,
|
|
428
|
515 gapsize);
|
|
|
516 }
|
|
|
517 else if (pos > gap)
|
|
|
518 {
|
|
|
519 memmove (GAP_ARRAY_MEMEL_ADDR (ga, gap),
|
|
|
520 GAP_ARRAY_MEMEL_ADDR (ga, gap + gapsize),
|
|
|
521 (pos - gap)*ga->elsize);
|
|
665
|
522 gap_array_adjust_markers (ga, (Membpos) (gap + gapsize),
|
|
|
523 (Membpos) (pos + gapsize), - gapsize);
|
|
428
|
524 }
|
|
|
525 ga->gap = pos;
|
|
|
526 }
|
|
|
527
|
|
|
528 /* Make the gap INCREMENT characters longer. Parallel to make_gap() in
|
|
|
529 insdel.c. */
|
|
|
530
|
|
|
531 static void
|
|
|
532 gap_array_make_gap (Gap_Array *ga, int increment)
|
|
|
533 {
|
|
|
534 char *ptr = ga->array;
|
|
|
535 int real_gap_loc;
|
|
|
536 int old_gap_size;
|
|
|
537
|
|
|
538 /* If we have to get more space, get enough to last a while. We use
|
|
|
539 a geometric progression that saves on realloc space. */
|
|
|
540 increment += 100 + ga->numels / 8;
|
|
|
541
|
|
|
542 ptr = (char *) xrealloc (ptr,
|
|
|
543 (ga->numels + ga->gapsize + increment)*ga->elsize);
|
|
|
544 if (ptr == 0)
|
|
|
545 memory_full ();
|
|
|
546 ga->array = ptr;
|
|
|
547
|
|
|
548 real_gap_loc = ga->gap;
|
|
|
549 old_gap_size = ga->gapsize;
|
|
|
550
|
|
|
551 /* Call the newly allocated space a gap at the end of the whole space. */
|
|
|
552 ga->gap = ga->numels + ga->gapsize;
|
|
|
553 ga->gapsize = increment;
|
|
|
554
|
|
|
555 /* Move the new gap down to be consecutive with the end of the old one.
|
|
|
556 This adjusts the markers properly too. */
|
|
|
557 gap_array_move_gap (ga, real_gap_loc + old_gap_size);
|
|
|
558
|
|
|
559 /* Now combine the two into one large gap. */
|
|
|
560 ga->gapsize += old_gap_size;
|
|
|
561 ga->gap = real_gap_loc;
|
|
|
562 }
|
|
|
563
|
|
|
564 /* ------------------------------- */
|
|
|
565 /* external functions */
|
|
|
566 /* ------------------------------- */
|
|
|
567
|
|
|
568 /* Insert NUMELS elements (pointed to by ELPTR) into the specified
|
|
|
569 gap array at POS. */
|
|
|
570
|
|
|
571 static void
|
|
|
572 gap_array_insert_els (Gap_Array *ga, int pos, void *elptr, int numels)
|
|
|
573 {
|
|
|
574 assert (pos >= 0 && pos <= ga->numels);
|
|
|
575 if (ga->gapsize < numels)
|
|
|
576 gap_array_make_gap (ga, numels - ga->gapsize);
|
|
|
577 if (pos != ga->gap)
|
|
|
578 gap_array_move_gap (ga, pos);
|
|
|
579
|
|
|
580 memcpy (GAP_ARRAY_MEMEL_ADDR (ga, ga->gap), (char *) elptr,
|
|
|
581 numels*ga->elsize);
|
|
|
582 ga->gapsize -= numels;
|
|
|
583 ga->gap += numels;
|
|
|
584 ga->numels += numels;
|
|
|
585 /* This is the equivalent of insert-before-markers.
|
|
|
586
|
|
|
587 #### Should only happen if marker is "moves forward at insert" type.
|
|
|
588 */
|
|
|
589
|
|
|
590 gap_array_adjust_markers (ga, pos - 1, pos, numels);
|
|
|
591 }
|
|
|
592
|
|
|
593 /* Delete NUMELS elements from the specified gap array, starting at FROM. */
|
|
|
594
|
|
|
595 static void
|
|
|
596 gap_array_delete_els (Gap_Array *ga, int from, int numdel)
|
|
|
597 {
|
|
|
598 int to = from + numdel;
|
|
|
599 int gapsize = ga->gapsize;
|
|
|
600
|
|
|
601 assert (from >= 0);
|
|
|
602 assert (numdel >= 0);
|
|
|
603 assert (to <= ga->numels);
|
|
|
604
|
|
|
605 /* Make sure the gap is somewhere in or next to what we are deleting. */
|
|
|
606 if (to < ga->gap)
|
|
|
607 gap_array_move_gap (ga, to);
|
|
|
608 if (from > ga->gap)
|
|
|
609 gap_array_move_gap (ga, from);
|
|
|
610
|
|
|
611 /* Relocate all markers pointing into the new, larger gap
|
|
|
612 to point at the end of the text before the gap. */
|
|
|
613 gap_array_adjust_markers (ga, to + gapsize, to + gapsize,
|
|
|
614 - numdel - gapsize);
|
|
|
615
|
|
|
616 ga->gapsize += numdel;
|
|
|
617 ga->numels -= numdel;
|
|
|
618 ga->gap = from;
|
|
|
619 }
|
|
|
620
|
|
|
621 static Gap_Array_Marker *
|
|
|
622 gap_array_make_marker (Gap_Array *ga, int pos)
|
|
|
623 {
|
|
|
624 Gap_Array_Marker *m;
|
|
|
625
|
|
|
626 assert (pos >= 0 && pos <= ga->numels);
|
|
|
627 if (gap_array_marker_freelist)
|
|
|
628 {
|
|
|
629 m = gap_array_marker_freelist;
|
|
|
630 gap_array_marker_freelist = gap_array_marker_freelist->next;
|
|
|
631 }
|
|
|
632 else
|
|
|
633 m = xnew (Gap_Array_Marker);
|
|
|
634
|
|
|
635 m->pos = GAP_ARRAY_ARRAY_TO_MEMORY_POS (ga, pos);
|
|
|
636 m->next = ga->markers;
|
|
|
637 ga->markers = m;
|
|
|
638 return m;
|
|
|
639 }
|
|
|
640
|
|
|
641 static void
|
|
|
642 gap_array_delete_marker (Gap_Array *ga, Gap_Array_Marker *m)
|
|
|
643 {
|
|
|
644 Gap_Array_Marker *p, *prev;
|
|
|
645
|
|
|
646 for (prev = 0, p = ga->markers; p && p != m; prev = p, p = p->next)
|
|
|
647 ;
|
|
|
648 assert (p);
|
|
|
649 if (prev)
|
|
|
650 prev->next = p->next;
|
|
|
651 else
|
|
|
652 ga->markers = p->next;
|
|
|
653 m->next = gap_array_marker_freelist;
|
|
|
654 m->pos = 0xDEADBEEF; /* -559038737 as an int */
|
|
|
655 gap_array_marker_freelist = m;
|
|
|
656 }
|
|
|
657
|
|
|
658 static void
|
|
|
659 gap_array_delete_all_markers (Gap_Array *ga)
|
|
|
660 {
|
|
|
661 Gap_Array_Marker *p, *next;
|
|
|
662
|
|
|
663 for (p = ga->markers; p; p = next)
|
|
|
664 {
|
|
|
665 next = p->next;
|
|
|
666 p->next = gap_array_marker_freelist;
|
|
|
667 p->pos = 0xDEADBEEF; /* -559038737 as an int */
|
|
|
668 gap_array_marker_freelist = p;
|
|
|
669 }
|
|
|
670 }
|
|
|
671
|
|
|
672 static void
|
|
|
673 gap_array_move_marker (Gap_Array *ga, Gap_Array_Marker *m, int pos)
|
|
|
674 {
|
|
|
675 assert (pos >= 0 && pos <= ga->numels);
|
|
|
676 m->pos = GAP_ARRAY_ARRAY_TO_MEMORY_POS (ga, pos);
|
|
|
677 }
|
|
|
678
|
|
|
679 #define gap_array_marker_pos(ga, m) \
|
|
|
680 GAP_ARRAY_MEMORY_TO_ARRAY_POS (ga, (m)->pos)
|
|
|
681
|
|
|
682 static Gap_Array *
|
|
|
683 make_gap_array (int elsize)
|
|
|
684 {
|
|
|
685 Gap_Array *ga = xnew_and_zero (Gap_Array);
|
|
|
686 ga->elsize = elsize;
|
|
|
687 return ga;
|
|
|
688 }
|
|
|
689
|
|
|
690 static void
|
|
|
691 free_gap_array (Gap_Array *ga)
|
|
|
692 {
|
|
|
693 if (ga->array)
|
|
|
694 xfree (ga->array);
|
|
|
695 gap_array_delete_all_markers (ga);
|
|
|
696 xfree (ga);
|
|
|
697 }
|
|
|
698
|
|
|
699
|
|
|
700 /************************************************************************/
|
|
|
701 /* Extent list primitives */
|
|
|
702 /************************************************************************/
|
|
|
703
|
|
|
704 /* A list of extents is maintained as a double gap array: one gap array
|
|
|
705 is ordered by start index (the "display order") and the other is
|
|
|
706 ordered by end index (the "e-order"). Note that positions in an
|
|
|
707 extent list should logically be conceived of as referring *to*
|
|
|
708 a particular extent (as is the norm in programs) rather than
|
|
|
709 sitting between two extents. Note also that callers of these
|
|
|
710 functions should not be aware of the fact that the extent list is
|
|
|
711 implemented as an array, except for the fact that positions are
|
|
|
712 integers (this should be generalized to handle integers and linked
|
|
|
713 list equally well).
|
|
|
714 */
|
|
|
715
|
|
|
716 /* Number of elements in an extent list */
|
|
|
717 #define extent_list_num_els(el) GAP_ARRAY_NUM_ELS(el->start)
|
|
|
718
|
|
|
719 /* Return the position at which EXTENT is located in the specified extent
|
|
|
720 list (in the display order if ENDP is 0, in the e-order otherwise).
|
|
|
721 If the extent is not found, the position where the extent would
|
|
|
722 be inserted is returned. If ENDP is 0, the insertion would go after
|
|
|
723 all other equal extents. If ENDP is not 0, the insertion would go
|
|
|
724 before all other equal extents. If FOUNDP is not 0, then whether
|
|
|
725 the extent was found will get written into it. */
|
|
|
726
|
|
|
727 static int
|
|
|
728 extent_list_locate (Extent_List *el, EXTENT extent, int endp, int *foundp)
|
|
|
729 {
|
|
|
730 Gap_Array *ga = endp ? el->end : el->start;
|
|
|
731 int left = 0, right = GAP_ARRAY_NUM_ELS (ga);
|
|
|
732 int oldfoundpos, foundpos;
|
|
|
733 int found;
|
|
|
734
|
|
|
735 while (left != right)
|
|
|
736 {
|
|
|
737 /* RIGHT might not point to a valid extent (i.e. it's at the end
|
|
|
738 of the list), so NEWPOS must round down. */
|
|
647
|
739 int newpos = (left + right) >> 1;
|
|
428
|
740 EXTENT e = EXTENT_GAP_ARRAY_AT (ga, (int) newpos);
|
|
|
741
|
|
|
742 if (endp ? EXTENT_E_LESS (e, extent) : EXTENT_LESS (e, extent))
|
|
647
|
743 left = newpos + 1;
|
|
428
|
744 else
|
|
|
745 right = newpos;
|
|
|
746 }
|
|
|
747
|
|
|
748 /* Now we're at the beginning of all equal extents. */
|
|
|
749 found = 0;
|
|
|
750 oldfoundpos = foundpos = left;
|
|
|
751 while (foundpos < GAP_ARRAY_NUM_ELS (ga))
|
|
|
752 {
|
|
|
753 EXTENT e = EXTENT_GAP_ARRAY_AT (ga, foundpos);
|
|
|
754 if (e == extent)
|
|
|
755 {
|
|
|
756 found = 1;
|
|
|
757 break;
|
|
|
758 }
|
|
|
759 if (!EXTENT_EQUAL (e, extent))
|
|
|
760 break;
|
|
|
761 foundpos++;
|
|
|
762 }
|
|
|
763 if (foundp)
|
|
|
764 *foundp = found;
|
|
|
765 if (found || !endp)
|
|
|
766 return foundpos;
|
|
|
767 else
|
|
|
768 return oldfoundpos;
|
|
|
769 }
|
|
|
770
|
|
|
771 /* Return the position of the first extent that begins at or after POS
|
|
|
772 (or ends at or after POS, if ENDP is not 0).
|
|
|
773
|
|
|
774 An out-of-range value for POS is allowed, and guarantees that the
|
|
|
775 position at the beginning or end of the extent list is returned. */
|
|
|
776
|
|
|
777 static int
|
|
665
|
778 extent_list_locate_from_pos (Extent_List *el, Membpos pos, int endp)
|
|
428
|
779 {
|
|
|
780 struct extent fake_extent;
|
|
|
781 /*
|
|
|
782
|
|
|
783 Note that if we search for [POS, POS], then we get the following:
|
|
|
784
|
|
|
785 -- if ENDP is 0, then all extents whose start position is <= POS
|
|
|
786 lie before the returned position, and all extents whose start
|
|
|
787 position is > POS lie at or after the returned position.
|
|
|
788
|
|
|
789 -- if ENDP is not 0, then all extents whose end position is < POS
|
|
|
790 lie before the returned position, and all extents whose end
|
|
|
791 position is >= POS lie at or after the returned position.
|
|
|
792
|
|
|
793 */
|
|
|
794 set_extent_start (&fake_extent, endp ? pos : pos-1);
|
|
|
795 set_extent_end (&fake_extent, endp ? pos : pos-1);
|
|
|
796 return extent_list_locate (el, &fake_extent, endp, 0);
|
|
|
797 }
|
|
|
798
|
|
|
799 /* Return the extent at POS. */
|
|
|
800
|
|
|
801 static EXTENT
|
|
665
|
802 extent_list_at (Extent_List *el, Membpos pos, int endp)
|
|
428
|
803 {
|
|
|
804 Gap_Array *ga = endp ? el->end : el->start;
|
|
|
805
|
|
|
806 assert (pos >= 0 && pos < GAP_ARRAY_NUM_ELS (ga));
|
|
|
807 return EXTENT_GAP_ARRAY_AT (ga, pos);
|
|
|
808 }
|
|
|
809
|
|
|
810 /* Insert an extent into an extent list. */
|
|
|
811
|
|
|
812 static void
|
|
|
813 extent_list_insert (Extent_List *el, EXTENT extent)
|
|
|
814 {
|
|
|
815 int pos, foundp;
|
|
|
816
|
|
|
817 pos = extent_list_locate (el, extent, 0, &foundp);
|
|
|
818 assert (!foundp);
|
|
|
819 gap_array_insert_els (el->start, pos, &extent, 1);
|
|
|
820 pos = extent_list_locate (el, extent, 1, &foundp);
|
|
|
821 assert (!foundp);
|
|
|
822 gap_array_insert_els (el->end, pos, &extent, 1);
|
|
|
823 }
|
|
|
824
|
|
|
825 /* Delete an extent from an extent list. */
|
|
|
826
|
|
|
827 static void
|
|
|
828 extent_list_delete (Extent_List *el, EXTENT extent)
|
|
|
829 {
|
|
|
830 int pos, foundp;
|
|
|
831
|
|
|
832 pos = extent_list_locate (el, extent, 0, &foundp);
|
|
|
833 assert (foundp);
|
|
|
834 gap_array_delete_els (el->start, pos, 1);
|
|
|
835 pos = extent_list_locate (el, extent, 1, &foundp);
|
|
|
836 assert (foundp);
|
|
|
837 gap_array_delete_els (el->end, pos, 1);
|
|
|
838 }
|
|
|
839
|
|
|
840 static void
|
|
|
841 extent_list_delete_all (Extent_List *el)
|
|
|
842 {
|
|
|
843 gap_array_delete_els (el->start, 0, GAP_ARRAY_NUM_ELS (el->start));
|
|
|
844 gap_array_delete_els (el->end, 0, GAP_ARRAY_NUM_ELS (el->end));
|
|
|
845 }
|
|
|
846
|
|
|
847 static Extent_List_Marker *
|
|
|
848 extent_list_make_marker (Extent_List *el, int pos, int endp)
|
|
|
849 {
|
|
|
850 Extent_List_Marker *m;
|
|
|
851
|
|
|
852 if (extent_list_marker_freelist)
|
|
|
853 {
|
|
|
854 m = extent_list_marker_freelist;
|
|
|
855 extent_list_marker_freelist = extent_list_marker_freelist->next;
|
|
|
856 }
|
|
|
857 else
|
|
|
858 m = xnew (Extent_List_Marker);
|
|
|
859
|
|
|
860 m->m = gap_array_make_marker (endp ? el->end : el->start, pos);
|
|
|
861 m->endp = endp;
|
|
|
862 m->next = el->markers;
|
|
|
863 el->markers = m;
|
|
|
864 return m;
|
|
|
865 }
|
|
|
866
|
|
|
867 #define extent_list_move_marker(el, mkr, pos) \
|
|
|
868 gap_array_move_marker((mkr)->endp ? (el)->end : (el)->start, (mkr)->m, pos)
|
|
|
869
|
|
|
870 static void
|
|
|
871 extent_list_delete_marker (Extent_List *el, Extent_List_Marker *m)
|
|
|
872 {
|
|
|
873 Extent_List_Marker *p, *prev;
|
|
|
874
|
|
|
875 for (prev = 0, p = el->markers; p && p != m; prev = p, p = p->next)
|
|
|
876 ;
|
|
|
877 assert (p);
|
|
|
878 if (prev)
|
|
|
879 prev->next = p->next;
|
|
|
880 else
|
|
|
881 el->markers = p->next;
|
|
|
882 m->next = extent_list_marker_freelist;
|
|
|
883 extent_list_marker_freelist = m;
|
|
|
884 gap_array_delete_marker (m->endp ? el->end : el->start, m->m);
|
|
|
885 }
|
|
|
886
|
|
|
887 #define extent_list_marker_pos(el, mkr) \
|
|
|
888 gap_array_marker_pos ((mkr)->endp ? (el)->end : (el)->start, (mkr)->m)
|
|
|
889
|
|
|
890 static Extent_List *
|
|
|
891 allocate_extent_list (void)
|
|
|
892 {
|
|
|
893 Extent_List *el = xnew (Extent_List);
|
|
440
|
894 el->start = make_gap_array (sizeof (EXTENT));
|
|
|
895 el->end = make_gap_array (sizeof (EXTENT));
|
|
428
|
896 el->markers = 0;
|
|
|
897 return el;
|
|
|
898 }
|
|
|
899
|
|
|
900 static void
|
|
|
901 free_extent_list (Extent_List *el)
|
|
|
902 {
|
|
|
903 free_gap_array (el->start);
|
|
|
904 free_gap_array (el->end);
|
|
|
905 xfree (el);
|
|
|
906 }
|
|
|
907
|
|
|
908
|
|
|
909 /************************************************************************/
|
|
|
910 /* Auxiliary extent structure */
|
|
|
911 /************************************************************************/
|
|
|
912
|
|
|
913 static Lisp_Object
|
|
|
914 mark_extent_auxiliary (Lisp_Object obj)
|
|
|
915 {
|
|
|
916 struct extent_auxiliary *data = XEXTENT_AUXILIARY (obj);
|
|
|
917 mark_object (data->begin_glyph);
|
|
|
918 mark_object (data->end_glyph);
|
|
|
919 mark_object (data->invisible);
|
|
|
920 mark_object (data->children);
|
|
|
921 mark_object (data->read_only);
|
|
|
922 mark_object (data->mouse_face);
|
|
|
923 mark_object (data->initial_redisplay_function);
|
|
|
924 mark_object (data->before_change_functions);
|
|
|
925 mark_object (data->after_change_functions);
|
|
|
926 return data->parent;
|
|
|
927 }
|
|
|
928
|
|
|
929 DEFINE_LRECORD_IMPLEMENTATION ("extent-auxiliary", extent_auxiliary,
|
|
|
930 mark_extent_auxiliary, internal_object_printer,
|
|
|
931 0, 0, 0, 0, struct extent_auxiliary);
|
|
|
932
|
|
|
933 void
|
|
|
934 allocate_extent_auxiliary (EXTENT ext)
|
|
|
935 {
|
|
|
936 Lisp_Object extent_aux;
|
|
|
937 struct extent_auxiliary *data =
|
|
|
938 alloc_lcrecord_type (struct extent_auxiliary, &lrecord_extent_auxiliary);
|
|
|
939
|
|
|
940 copy_lcrecord (data, &extent_auxiliary_defaults);
|
|
|
941 XSETEXTENT_AUXILIARY (extent_aux, data);
|
|
|
942 ext->plist = Fcons (extent_aux, ext->plist);
|
|
|
943 ext->flags.has_aux = 1;
|
|
|
944 }
|
|
|
945
|
|
|
946
|
|
|
947 /************************************************************************/
|
|
|
948 /* Extent info structure */
|
|
|
949 /************************************************************************/
|
|
|
950
|
|
|
951 /* An extent-info structure consists of a list of the buffer or string's
|
|
|
952 extents and a "stack of extents" that lists all of the extents over
|
|
|
953 a particular position. The stack-of-extents info is used for
|
|
|
954 optimization purposes -- it basically caches some info that might
|
|
|
955 be expensive to compute. Certain otherwise hard computations are easy
|
|
|
956 given the stack of extents over a particular position, and if the
|
|
|
957 stack of extents over a nearby position is known (because it was
|
|
|
958 calculated at some prior point in time), it's easy to move the stack
|
|
|
959 of extents to the proper position.
|
|
|
960
|
|
|
961 Given that the stack of extents is an optimization, and given that
|
|
|
962 it requires memory, a string's stack of extents is wiped out each
|
|
|
963 time a garbage collection occurs. Therefore, any time you retrieve
|
|
|
964 the stack of extents, it might not be there. If you need it to
|
|
|
965 be there, use the _force version.
|
|
|
966
|
|
|
967 Similarly, a string may or may not have an extent_info structure.
|
|
|
968 (Generally it won't if there haven't been any extents added to the
|
|
|
969 string.) So use the _force version if you need the extent_info
|
|
|
970 structure to be there. */
|
|
|
971
|
|
|
972 static struct stack_of_extents *allocate_soe (void);
|
|
|
973 static void free_soe (struct stack_of_extents *soe);
|
|
|
974 static void soe_invalidate (Lisp_Object obj);
|
|
|
975
|
|
|
976 static Lisp_Object
|
|
|
977 mark_extent_info (Lisp_Object obj)
|
|
|
978 {
|
|
|
979 struct extent_info *data = (struct extent_info *) XEXTENT_INFO (obj);
|
|
|
980 int i;
|
|
|
981 Extent_List *list = data->extents;
|
|
|
982
|
|
|
983 /* Vbuffer_defaults and Vbuffer_local_symbols are buffer-like
|
|
|
984 objects that are created specially and never have their extent
|
|
|
985 list initialized (or rather, it is set to zero in
|
|
|
986 nuke_all_buffer_slots()). However, these objects get
|
|
|
987 garbage-collected so we have to deal.
|
|
|
988
|
|
|
989 (Also the list can be zero when we're dealing with a destroyed
|
|
|
990 buffer.) */
|
|
|
991
|
|
|
992 if (list)
|
|
|
993 {
|
|
|
994 for (i = 0; i < extent_list_num_els (list); i++)
|
|
|
995 {
|
|
|
996 struct extent *extent = extent_list_at (list, i, 0);
|
|
|
997 Lisp_Object exobj;
|
|
|
998
|
|
|
999 XSETEXTENT (exobj, extent);
|
|
|
1000 mark_object (exobj);
|
|
|
1001 }
|
|
|
1002 }
|
|
|
1003
|
|
|
1004 return Qnil;
|
|
|
1005 }
|
|
|
1006
|
|
|
1007 static void
|
|
|
1008 finalize_extent_info (void *header, int for_disksave)
|
|
|
1009 {
|
|
|
1010 struct extent_info *data = (struct extent_info *) header;
|
|
|
1011
|
|
|
1012 if (for_disksave)
|
|
|
1013 return;
|
|
|
1014
|
|
|
1015 if (data->soe)
|
|
|
1016 {
|
|
|
1017 free_soe (data->soe);
|
|
|
1018 data->soe = 0;
|
|
|
1019 }
|
|
|
1020 if (data->extents)
|
|
|
1021 {
|
|
|
1022 free_extent_list (data->extents);
|
|
|
1023 data->extents = 0;
|
|
|
1024 }
|
|
|
1025 }
|
|
|
1026
|
|
|
1027 DEFINE_LRECORD_IMPLEMENTATION ("extent-info", extent_info,
|
|
|
1028 mark_extent_info, internal_object_printer,
|
|
|
1029 finalize_extent_info, 0, 0, 0,
|
|
|
1030 struct extent_info);
|
|
|
1031
|
|
|
1032 static Lisp_Object
|
|
|
1033 allocate_extent_info (void)
|
|
|
1034 {
|
|
|
1035 Lisp_Object extent_info;
|
|
|
1036 struct extent_info *data =
|
|
|
1037 alloc_lcrecord_type (struct extent_info, &lrecord_extent_info);
|
|
|
1038
|
|
|
1039 XSETEXTENT_INFO (extent_info, data);
|
|
|
1040 data->extents = allocate_extent_list ();
|
|
|
1041 data->soe = 0;
|
|
|
1042 return extent_info;
|
|
|
1043 }
|
|
|
1044
|
|
|
1045 void
|
|
|
1046 flush_cached_extent_info (Lisp_Object extent_info)
|
|
|
1047 {
|
|
|
1048 struct extent_info *data = XEXTENT_INFO (extent_info);
|
|
|
1049
|
|
|
1050 if (data->soe)
|
|
|
1051 {
|
|
|
1052 free_soe (data->soe);
|
|
|
1053 data->soe = 0;
|
|
|
1054 }
|
|
|
1055 }
|
|
|
1056
|
|
|
1057
|
|
|
1058 /************************************************************************/
|
|
|
1059 /* Buffer/string extent primitives */
|
|
|
1060 /************************************************************************/
|
|
|
1061
|
|
|
1062 /* The functions in this section are the ONLY ones that should know
|
|
|
1063 about the internal implementation of the extent lists. Other functions
|
|
|
1064 should only know that there are two orderings on extents, the "display"
|
|
|
1065 order (sorted by start position, basically) and the e-order (sorted
|
|
|
1066 by end position, basically), and that certain operations are provided
|
|
|
1067 to manipulate the list. */
|
|
|
1068
|
|
|
1069 /* ------------------------------- */
|
|
|
1070 /* basic primitives */
|
|
|
1071 /* ------------------------------- */
|
|
|
1072
|
|
|
1073 static Lisp_Object
|
|
|
1074 decode_buffer_or_string (Lisp_Object object)
|
|
|
1075 {
|
|
|
1076 if (NILP (object))
|
|
|
1077 XSETBUFFER (object, current_buffer);
|
|
|
1078 else if (BUFFERP (object))
|
|
|
1079 CHECK_LIVE_BUFFER (object);
|
|
|
1080 else if (STRINGP (object))
|
|
|
1081 ;
|
|
|
1082 else
|
|
|
1083 dead_wrong_type_argument (Qbuffer_or_string_p, object);
|
|
|
1084
|
|
|
1085 return object;
|
|
|
1086 }
|
|
|
1087
|
|
|
1088 EXTENT
|
|
|
1089 extent_ancestor_1 (EXTENT e)
|
|
|
1090 {
|
|
|
1091 while (e->flags.has_parent)
|
|
|
1092 {
|
|
|
1093 /* There should be no circularities except in case of a logic
|
|
|
1094 error somewhere in the extent code */
|
|
|
1095 e = XEXTENT (XEXTENT_AUXILIARY (XCAR (e->plist))->parent);
|
|
|
1096 }
|
|
|
1097 return e;
|
|
|
1098 }
|
|
|
1099
|
|
|
1100 /* Given an extent object (string or buffer or nil), return its extent info.
|
|
|
1101 This may be 0 for a string. */
|
|
|
1102
|
|
|
1103 static struct extent_info *
|
|
|
1104 buffer_or_string_extent_info (Lisp_Object object)
|
|
|
1105 {
|
|
|
1106 if (STRINGP (object))
|
|
|
1107 {
|
|
|
1108 Lisp_Object plist = XSTRING (object)->plist;
|
|
|
1109 if (!CONSP (plist) || !EXTENT_INFOP (XCAR (plist)))
|
|
|
1110 return 0;
|
|
|
1111 return XEXTENT_INFO (XCAR (plist));
|
|
|
1112 }
|
|
|
1113 else if (NILP (object))
|
|
|
1114 return 0;
|
|
|
1115 else
|
|
|
1116 return XEXTENT_INFO (XBUFFER (object)->extent_info);
|
|
|
1117 }
|
|
|
1118
|
|
|
1119 /* Given a string or buffer, return its extent list. This may be
|
|
|
1120 0 for a string. */
|
|
|
1121
|
|
|
1122 static Extent_List *
|
|
|
1123 buffer_or_string_extent_list (Lisp_Object object)
|
|
|
1124 {
|
|
|
1125 struct extent_info *info = buffer_or_string_extent_info (object);
|
|
|
1126
|
|
|
1127 if (!info)
|
|
|
1128 return 0;
|
|
|
1129 return info->extents;
|
|
|
1130 }
|
|
|
1131
|
|
|
1132 /* Given a string or buffer, return its extent info. If it's not there,
|
|
|
1133 create it. */
|
|
|
1134
|
|
|
1135 static struct extent_info *
|
|
|
1136 buffer_or_string_extent_info_force (Lisp_Object object)
|
|
|
1137 {
|
|
|
1138 struct extent_info *info = buffer_or_string_extent_info (object);
|
|
|
1139
|
|
|
1140 if (!info)
|
|
|
1141 {
|
|
|
1142 Lisp_Object extent_info;
|
|
|
1143
|
|
|
1144 assert (STRINGP (object)); /* should never happen for buffers --
|
|
|
1145 the only buffers without an extent
|
|
|
1146 info are those after finalization,
|
|
|
1147 destroyed buffers, or special
|
|
|
1148 Lisp-inaccessible buffer objects. */
|
|
|
1149 extent_info = allocate_extent_info ();
|
|
|
1150 XSTRING (object)->plist = Fcons (extent_info, XSTRING (object)->plist);
|
|
|
1151 return XEXTENT_INFO (extent_info);
|
|
|
1152 }
|
|
|
1153
|
|
|
1154 return info;
|
|
|
1155 }
|
|
|
1156
|
|
|
1157 /* Detach all the extents in OBJECT. Called from redisplay. */
|
|
|
1158
|
|
|
1159 void
|
|
|
1160 detach_all_extents (Lisp_Object object)
|
|
|
1161 {
|
|
|
1162 struct extent_info *data = buffer_or_string_extent_info (object);
|
|
|
1163
|
|
|
1164 if (data)
|
|
|
1165 {
|
|
|
1166 if (data->extents)
|
|
|
1167 {
|
|
|
1168 int i;
|
|
|
1169
|
|
|
1170 for (i = 0; i < extent_list_num_els (data->extents); i++)
|
|
|
1171 {
|
|
|
1172 EXTENT e = extent_list_at (data->extents, i, 0);
|
|
|
1173 /* No need to do detach_extent(). Just nuke the damn things,
|
|
|
1174 which results in the equivalent but faster. */
|
|
|
1175 set_extent_start (e, -1);
|
|
|
1176 set_extent_end (e, -1);
|
|
|
1177 }
|
|
|
1178 }
|
|
|
1179
|
|
|
1180 /* But we need to clear all the lists containing extents or
|
|
|
1181 havoc will result. */
|
|
|
1182 extent_list_delete_all (data->extents);
|
|
|
1183 soe_invalidate (object);
|
|
|
1184 }
|
|
|
1185 }
|
|
|
1186
|
|
|
1187
|
|
|
1188 void
|
|
|
1189 init_buffer_extents (struct buffer *b)
|
|
|
1190 {
|
|
|
1191 b->extent_info = allocate_extent_info ();
|
|
|
1192 }
|
|
|
1193
|
|
|
1194 void
|
|
|
1195 uninit_buffer_extents (struct buffer *b)
|
|
|
1196 {
|
|
|
1197 struct extent_info *data = XEXTENT_INFO (b->extent_info);
|
|
|
1198
|
|
|
1199 /* Don't destroy the extents here -- there may still be children
|
|
|
1200 extents pointing to the extents. */
|
|
|
1201 detach_all_extents (make_buffer (b));
|
|
|
1202 finalize_extent_info (data, 0);
|
|
|
1203 }
|
|
|
1204
|
|
|
1205 /* Retrieve the extent list that an extent is a member of; the
|
|
|
1206 return value will never be 0 except in destroyed buffers (in which
|
|
|
1207 case the only extents that can refer to this buffer are detached
|
|
|
1208 ones). */
|
|
|
1209
|
|
|
1210 #define extent_extent_list(e) buffer_or_string_extent_list (extent_object (e))
|
|
|
1211
|
|
|
1212 /* ------------------------------- */
|
|
|
1213 /* stack of extents */
|
|
|
1214 /* ------------------------------- */
|
|
|
1215
|
|
|
1216 #ifdef ERROR_CHECK_EXTENTS
|
|
|
1217
|
|
|
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
|
|
|
1282 XSETEXTENT (extent, e);
|
|
|
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;
|
|
665
|
1301 printf ("SOE pos is %d (membpos %d)\n",
|
|
428
|
1302 soe->pos < 0 ? soe->pos :
|
|
665
|
1303 buffer_or_string_membpos_to_bytebpos (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
|
|
665
|
1378 soe_move (Lisp_Object obj, Membpos 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
|
|
665
|
1392 printf ("Moving SOE from %d (membpos %d) to %d (membpos %d)\n",
|
|
428
|
1393 soe->pos < 0 ? soe->pos :
|
|
665
|
1394 buffer_or_string_membpos_to_bytebpos (obj, soe->pos), soe->pos,
|
|
|
1395 buffer_or_string_membpos_to_bytebpos (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,
|
|
665
|
1536 use extent_endpoint_charbpos(). */
|
|
|
1537
|
|
|
1538 static Bytebpos
|
|
|
1539 extent_endpoint_bytebpos (EXTENT extent, int endp)
|
|
428
|
1540 {
|
|
|
1541 assert (EXTENT_LIVE_P (extent));
|
|
|
1542 assert (!extent_detached_p (extent));
|
|
|
1543 {
|
|
665
|
1544 Membpos i = endp ? extent_end (extent) : extent_start (extent);
|
|
428
|
1545 Lisp_Object obj = extent_object (extent);
|
|
665
|
1546 return buffer_or_string_membpos_to_bytebpos (obj, i);
|
|
428
|
1547 }
|
|
|
1548 }
|
|
|
1549
|
|
665
|
1550 static Charbpos
|
|
|
1551 extent_endpoint_charbpos (EXTENT extent, int endp)
|
|
428
|
1552 {
|
|
|
1553 assert (EXTENT_LIVE_P (extent));
|
|
|
1554 assert (!extent_detached_p (extent));
|
|
|
1555 {
|
|
665
|
1556 Membpos i = endp ? extent_end (extent) : extent_start (extent);
|
|
428
|
1557 Lisp_Object obj = extent_object (extent);
|
|
665
|
1558 return buffer_or_string_membpos_to_charbpos (obj, i);
|
|
428
|
1559 }
|
|
|
1560 }
|
|
|
1561
|
|
|
1562 /* A change to an extent occurred that will change the display, so
|
|
|
1563 notify redisplay. Maybe also recurse over all the extent's
|
|
|
1564 descendants. */
|
|
|
1565
|
|
|
1566 static void
|
|
|
1567 extent_changed_for_redisplay (EXTENT extent, int descendants_too,
|
|
|
1568 int invisibility_change)
|
|
|
1569 {
|
|
|
1570 Lisp_Object object;
|
|
|
1571 Lisp_Object rest;
|
|
|
1572
|
|
|
1573 /* we could easily encounter a detached extent while traversing the
|
|
|
1574 children, but we should never be able to encounter a dead extent. */
|
|
|
1575 assert (EXTENT_LIVE_P (extent));
|
|
|
1576
|
|
|
1577 if (descendants_too)
|
|
|
1578 {
|
|
|
1579 Lisp_Object children = extent_children (extent);
|
|
|
1580
|
|
|
1581 if (!NILP (children))
|
|
|
1582 {
|
|
|
1583 /* first mark all of the extent's children. We will lose big-time
|
|
|
1584 if there are any circularities here, so we sure as hell better
|
|
|
1585 ensure that there aren't. */
|
|
|
1586 LIST_LOOP (rest, XWEAK_LIST_LIST (children))
|
|
|
1587 extent_changed_for_redisplay (XEXTENT (XCAR (rest)), 1,
|
|
|
1588 invisibility_change);
|
|
|
1589 }
|
|
|
1590 }
|
|
|
1591
|
|
|
1592 /* now mark the extent itself. */
|
|
|
1593
|
|
|
1594 object = extent_object (extent);
|
|
|
1595
|
|
442
|
1596 if (extent_detached_p (extent))
|
|
428
|
1597 return;
|
|
|
1598
|
|
442
|
1599 else if (STRINGP (object))
|
|
|
1600 {
|
|
|
1601 /* #### Changes to string extents can affect redisplay if they are
|
|
|
1602 in the modeline or in the gutters.
|
|
|
1603
|
|
|
1604 If the extent is in some generated-modeline-string: when we
|
|
|
1605 change an extent in generated-modeline-string, this changes its
|
|
|
1606 parent, which is in `modeline-format', so we should force the
|
|
|
1607 modeline to be updated. But how to determine whether a string
|
|
|
1608 is a `generated-modeline-string'? Looping through all buffers
|
|
|
1609 is not very efficient. Should we add all
|
|
|
1610 `generated-modeline-string' strings to a hash table? Maybe
|
|
|
1611 efficiency is not the greatest concern here and there's no big
|
|
|
1612 loss in looping over the buffers.
|
|
|
1613
|
|
|
1614 If the extent is in a gutter we mark the gutter as
|
|
|
1615 changed. This means (a) we can update extents in the gutters
|
|
|
1616 when we need it. (b) we don't have to update the gutters when
|
|
|
1617 only extents attached to buffers have changed. */
|
|
|
1618
|
|
|
1619 if (!in_modeline_generation)
|
|
|
1620 MARK_EXTENTS_CHANGED;
|
|
|
1621 gutter_extent_signal_changed_region_maybe (object,
|
|
665
|
1622 extent_endpoint_charbpos (extent, 0),
|
|
|
1623 extent_endpoint_charbpos (extent, 1));
|
|
442
|
1624 }
|
|
|
1625 else if (BUFFERP (object))
|
|
|
1626 {
|
|
|
1627 struct buffer *b;
|
|
|
1628 b = XBUFFER (object);
|
|
|
1629 BUF_FACECHANGE (b)++;
|
|
|
1630 MARK_EXTENTS_CHANGED;
|
|
|
1631 if (invisibility_change)
|
|
|
1632 MARK_CLIP_CHANGED;
|
|
|
1633 buffer_extent_signal_changed_region (b,
|
|
665
|
1634 extent_endpoint_charbpos (extent, 0),
|
|
|
1635 extent_endpoint_charbpos (extent, 1));
|
|
442
|
1636 }
|
|
428
|
1637 }
|
|
|
1638
|
|
|
1639 /* A change to an extent occurred that might affect redisplay.
|
|
|
1640 This is called when properties such as the endpoints, the layout,
|
|
|
1641 or the priority changes. Redisplay will be affected only if
|
|
|
1642 the extent has any displayable attributes. */
|
|
|
1643
|
|
|
1644 static void
|
|
|
1645 extent_maybe_changed_for_redisplay (EXTENT extent, int descendants_too,
|
|
|
1646 int invisibility_change)
|
|
|
1647 {
|
|
|
1648 /* Retrieve the ancestor for efficiency */
|
|
|
1649 EXTENT anc = extent_ancestor (extent);
|
|
|
1650 if (!NILP (extent_face (anc)) ||
|
|
|
1651 !NILP (extent_begin_glyph (anc)) ||
|
|
|
1652 !NILP (extent_end_glyph (anc)) ||
|
|
|
1653 !NILP (extent_mouse_face (anc)) ||
|
|
|
1654 !NILP (extent_invisible (anc)) ||
|
|
|
1655 !NILP (extent_initial_redisplay_function (anc)) ||
|
|
|
1656 invisibility_change)
|
|
|
1657 extent_changed_for_redisplay (extent, descendants_too,
|
|
|
1658 invisibility_change);
|
|
|
1659 }
|
|
|
1660
|
|
|
1661 static EXTENT
|
|
|
1662 make_extent_detached (Lisp_Object object)
|
|
|
1663 {
|
|
|
1664 EXTENT extent = allocate_extent ();
|
|
|
1665
|
|
|
1666 assert (NILP (object) || STRINGP (object) ||
|
|
|
1667 (BUFFERP (object) && BUFFER_LIVE_P (XBUFFER (object))));
|
|
|
1668 extent_object (extent) = object;
|
|
|
1669 /* Now make sure the extent info exists. */
|
|
|
1670 if (!NILP (object))
|
|
|
1671 buffer_or_string_extent_info_force (object);
|
|
|
1672 return extent;
|
|
|
1673 }
|
|
|
1674
|
|
|
1675 /* A "real" extent is any extent other than the internal (not-user-visible)
|
|
|
1676 extents used by `map-extents'. */
|
|
|
1677
|
|
|
1678 static EXTENT
|
|
|
1679 real_extent_at_forward (Extent_List *el, int pos, int endp)
|
|
|
1680 {
|
|
|
1681 for (; pos < extent_list_num_els (el); pos++)
|
|
|
1682 {
|
|
|
1683 EXTENT e = extent_list_at (el, pos, endp);
|
|
|
1684 if (!extent_internal_p (e))
|
|
|
1685 return e;
|
|
|
1686 }
|
|
|
1687 return 0;
|
|
|
1688 }
|
|
|
1689
|
|
|
1690 static EXTENT
|
|
|
1691 real_extent_at_backward (Extent_List *el, int pos, int endp)
|
|
|
1692 {
|
|
|
1693 for (; pos >= 0; pos--)
|
|
|
1694 {
|
|
|
1695 EXTENT e = extent_list_at (el, pos, endp);
|
|
|
1696 if (!extent_internal_p (e))
|
|
|
1697 return e;
|
|
|
1698 }
|
|
|
1699 return 0;
|
|
|
1700 }
|
|
|
1701
|
|
|
1702 static EXTENT
|
|
|
1703 extent_first (Lisp_Object obj)
|
|
|
1704 {
|
|
|
1705 Extent_List *el = buffer_or_string_extent_list (obj);
|
|
|
1706
|
|
|
1707 if (!el)
|
|
|
1708 return 0;
|
|
|
1709 return real_extent_at_forward (el, 0, 0);
|
|
|
1710 }
|
|
|
1711
|
|
|
1712 #ifdef DEBUG_XEMACS
|
|
|
1713 static EXTENT
|
|
|
1714 extent_e_first (Lisp_Object obj)
|
|
|
1715 {
|
|
|
1716 Extent_List *el = buffer_or_string_extent_list (obj);
|
|
|
1717
|
|
|
1718 if (!el)
|
|
|
1719 return 0;
|
|
|
1720 return real_extent_at_forward (el, 0, 1);
|
|
|
1721 }
|
|
|
1722 #endif
|
|
|
1723
|
|
|
1724 static EXTENT
|
|
|
1725 extent_next (EXTENT e)
|
|
|
1726 {
|
|
|
1727 Extent_List *el = extent_extent_list (e);
|
|
|
1728 int foundp;
|
|
|
1729 int pos = extent_list_locate (el, e, 0, &foundp);
|
|
|
1730 assert (foundp);
|
|
|
1731 return real_extent_at_forward (el, pos+1, 0);
|
|
|
1732 }
|
|
|
1733
|
|
|
1734 #ifdef DEBUG_XEMACS
|
|
|
1735 static EXTENT
|
|
|
1736 extent_e_next (EXTENT e)
|
|
|
1737 {
|
|
|
1738 Extent_List *el = extent_extent_list (e);
|
|
|
1739 int foundp;
|
|
|
1740 int pos = extent_list_locate (el, e, 1, &foundp);
|
|
|
1741 assert (foundp);
|
|
|
1742 return real_extent_at_forward (el, pos+1, 1);
|
|
|
1743 }
|
|
|
1744 #endif
|
|
|
1745
|
|
|
1746 static EXTENT
|
|
|
1747 extent_last (Lisp_Object obj)
|
|
|
1748 {
|
|
|
1749 Extent_List *el = buffer_or_string_extent_list (obj);
|
|
|
1750
|
|
|
1751 if (!el)
|
|
|
1752 return 0;
|
|
|
1753 return real_extent_at_backward (el, extent_list_num_els (el) - 1, 0);
|
|
|
1754 }
|
|
|
1755
|
|
|
1756 #ifdef DEBUG_XEMACS
|
|
|
1757 static EXTENT
|
|
|
1758 extent_e_last (Lisp_Object obj)
|
|
|
1759 {
|
|
|
1760 Extent_List *el = buffer_or_string_extent_list (obj);
|
|
|
1761
|
|
|
1762 if (!el)
|
|
|
1763 return 0;
|
|
|
1764 return real_extent_at_backward (el, extent_list_num_els (el) - 1, 1);
|
|
|
1765 }
|
|
|
1766 #endif
|
|
|
1767
|
|
|
1768 static EXTENT
|
|
|
1769 extent_previous (EXTENT e)
|
|
|
1770 {
|
|
|
1771 Extent_List *el = extent_extent_list (e);
|
|
|
1772 int foundp;
|
|
|
1773 int pos = extent_list_locate (el, e, 0, &foundp);
|
|
|
1774 assert (foundp);
|
|
|
1775 return real_extent_at_backward (el, pos-1, 0);
|
|
|
1776 }
|
|
|
1777
|
|
|
1778 #ifdef DEBUG_XEMACS
|
|
|
1779 static EXTENT
|
|
|
1780 extent_e_previous (EXTENT e)
|
|
|
1781 {
|
|
|
1782 Extent_List *el = extent_extent_list (e);
|
|
|
1783 int foundp;
|
|
|
1784 int pos = extent_list_locate (el, e, 1, &foundp);
|
|
|
1785 assert (foundp);
|
|
|
1786 return real_extent_at_backward (el, pos-1, 1);
|
|
|
1787 }
|
|
|
1788 #endif
|
|
|
1789
|
|
|
1790 static void
|
|
|
1791 extent_attach (EXTENT extent)
|
|
|
1792 {
|
|
|
1793 Extent_List *el = extent_extent_list (extent);
|
|
|
1794
|
|
|
1795 extent_list_insert (el, extent);
|
|
|
1796 soe_insert (extent_object (extent), extent);
|
|
|
1797 /* only this extent changed */
|
|
|
1798 extent_maybe_changed_for_redisplay (extent, 0,
|
|
|
1799 !NILP (extent_invisible (extent)));
|
|
|
1800 }
|
|
|
1801
|
|
|
1802 static void
|
|
|
1803 extent_detach (EXTENT extent)
|
|
|
1804 {
|
|
|
1805 Extent_List *el;
|
|
|
1806
|
|
|
1807 if (extent_detached_p (extent))
|
|
|
1808 return;
|
|
|
1809 el = extent_extent_list (extent);
|
|
|
1810
|
|
|
1811 /* call this before messing with the extent. */
|
|
|
1812 extent_maybe_changed_for_redisplay (extent, 0,
|
|
|
1813 !NILP (extent_invisible (extent)));
|
|
|
1814 extent_list_delete (el, extent);
|
|
|
1815 soe_delete (extent_object (extent), extent);
|
|
|
1816 set_extent_start (extent, -1);
|
|
|
1817 set_extent_end (extent, -1);
|
|
|
1818 }
|
|
|
1819
|
|
|
1820 /* ------------------------------- */
|
|
|
1821 /* map-extents et al. */
|
|
|
1822 /* ------------------------------- */
|
|
|
1823
|
|
|
1824 /* Returns true iff map_extents() would visit the given extent.
|
|
|
1825 See the comments at map_extents() for info on the overlap rule.
|
|
|
1826 Assumes that all validation on the extent and buffer positions has
|
|
|
1827 already been performed (see Fextent_in_region_p ()).
|
|
|
1828 */
|
|
|
1829 static int
|
|
665
|
1830 extent_in_region_p (EXTENT extent, Bytebpos from, Bytebpos to,
|
|
428
|
1831 unsigned int flags)
|
|
|
1832 {
|
|
|
1833 Lisp_Object obj = extent_object (extent);
|
|
|
1834 Endpoint_Index start, end, exs, exe;
|
|
|
1835 int start_open, end_open;
|
|
|
1836 unsigned int all_extents_flags = flags & ME_ALL_EXTENTS_MASK;
|
|
|
1837 unsigned int in_region_flags = flags & ME_IN_REGION_MASK;
|
|
|
1838 int retval;
|
|
|
1839
|
|
|
1840 /* A zero-length region is treated as closed-closed. */
|
|
|
1841 if (from == to)
|
|
|
1842 {
|
|
|
1843 flags |= ME_END_CLOSED;
|
|
|
1844 flags &= ~ME_START_OPEN;
|
|
|
1845 }
|
|
|
1846
|
|
|
1847 /* So is a zero-length extent. */
|
|
|
1848 if (extent_start (extent) == extent_end (extent))
|
|
|
1849 start_open = 0, end_open = 0;
|
|
|
1850 /* `all_extents_flags' will almost always be zero. */
|
|
|
1851 else if (all_extents_flags == 0)
|
|
|
1852 {
|
|
|
1853 start_open = extent_start_open_p (extent);
|
|
|
1854 end_open = extent_end_open_p (extent);
|
|
|
1855 }
|
|
|
1856 else
|
|
|
1857 switch (all_extents_flags)
|
|
|
1858 {
|
|
|
1859 case ME_ALL_EXTENTS_CLOSED: start_open = 0, end_open = 0; break;
|
|
|
1860 case ME_ALL_EXTENTS_OPEN: start_open = 1, end_open = 1; break;
|
|
|
1861 case ME_ALL_EXTENTS_CLOSED_OPEN: start_open = 0, end_open = 1; break;
|
|
|
1862 case ME_ALL_EXTENTS_OPEN_CLOSED: start_open = 1, end_open = 0; break;
|
|
442
|
1863 default: abort(); return 0;
|
|
428
|
1864 }
|
|
|
1865
|
|
665
|
1866 start = buffer_or_string_bytebpos_to_startind (obj, from,
|
|
428
|
1867 flags & ME_START_OPEN);
|
|
665
|
1868 end = buffer_or_string_bytebpos_to_endind (obj, to, ! (flags & ME_END_CLOSED));
|
|
|
1869 exs = membpos_to_startind (extent_start (extent), start_open);
|
|
|
1870 exe = membpos_to_endind (extent_end (extent), end_open);
|
|
428
|
1871
|
|
|
1872 /* It's easy to determine whether an extent lies *outside* the
|
|
|
1873 region -- just determine whether it's completely before
|
|
|
1874 or completely after the region. Reject all such extents, so
|
|
|
1875 we're now left with only the extents that overlap the region.
|
|
|
1876 */
|
|
|
1877
|
|
|
1878 if (exs > end || exe < start)
|
|
|
1879 return 0;
|
|
|
1880
|
|
|
1881 /* See if any further restrictions are called for. */
|
|
|
1882 /* in_region_flags will almost always be zero. */
|
|
|
1883 if (in_region_flags == 0)
|
|
|
1884 retval = 1;
|
|
|
1885 else
|
|
|
1886 switch (in_region_flags)
|
|
|
1887 {
|
|
|
1888 case ME_START_IN_REGION:
|
|
|
1889 retval = start <= exs && exs <= end; break;
|
|
|
1890 case ME_END_IN_REGION:
|
|
|
1891 retval = start <= exe && exe <= end; break;
|
|
|
1892 case ME_START_AND_END_IN_REGION:
|
|
|
1893 retval = start <= exs && exe <= end; break;
|
|
|
1894 case ME_START_OR_END_IN_REGION:
|
|
|
1895 retval = (start <= exs && exs <= end) || (start <= exe && exe <= end);
|
|
|
1896 break;
|
|
|
1897 default:
|
|
442
|
1898 abort(); return 0;
|
|
428
|
1899 }
|
|
|
1900 return flags & ME_NEGATE_IN_REGION ? !retval : retval;
|
|
|
1901 }
|
|
|
1902
|
|
|
1903 struct map_extents_struct
|
|
|
1904 {
|
|
|
1905 Extent_List *el;
|
|
|
1906 Extent_List_Marker *mkr;
|
|
|
1907 EXTENT range;
|
|
|
1908 };
|
|
|
1909
|
|
|
1910 static Lisp_Object
|
|
|
1911 map_extents_unwind (Lisp_Object obj)
|
|
|
1912 {
|
|
|
1913 struct map_extents_struct *closure =
|
|
|
1914 (struct map_extents_struct *) get_opaque_ptr (obj);
|
|
|
1915 free_opaque_ptr (obj);
|
|
|
1916 if (closure->range)
|
|
|
1917 extent_detach (closure->range);
|
|
|
1918 if (closure->mkr)
|
|
|
1919 extent_list_delete_marker (closure->el, closure->mkr);
|
|
|
1920 return Qnil;
|
|
|
1921 }
|
|
|
1922
|
|
|
1923 /* This is the guts of `map-extents' and the other functions that
|
|
|
1924 map over extents. In theory the operation of this function is
|
|
|
1925 simple: just figure out what extents we're mapping over, and
|
|
|
1926 call the function on each one of them in the range. Unfortunately
|
|
|
1927 there are a wide variety of things that the mapping function
|
|
|
1928 might do, and we have to be very tricky to avoid getting messed
|
|
|
1929 up. Furthermore, this function needs to be very fast (it is
|
|
|
1930 called multiple times every time text is inserted or deleted
|
|
|
1931 from a buffer), and so we can't always afford the overhead of
|
|
|
1932 dealing with all the possible things that the mapping function
|
|
|
1933 might do; thus, there are many flags that can be specified
|
|
|
1934 indicating what the mapping function might or might not do.
|
|
|
1935
|
|
|
1936 The result of all this is that this is the most complicated
|
|
|
1937 function in this file. Change it at your own risk!
|
|
|
1938
|
|
|
1939 A potential simplification to the logic below is to determine
|
|
|
1940 all the extents that the mapping function should be called on
|
|
|
1941 before any calls are actually made and save them in an array.
|
|
|
1942 That introduces its own complications, however (the array
|
|
|
1943 needs to be marked for garbage-collection, and a static array
|
|
|
1944 cannot be used because map_extents() needs to be reentrant).
|
|
|
1945 Furthermore, the results might be a little less sensible than
|
|
|
1946 the logic below. */
|
|
|
1947
|
|
|
1948
|
|
|
1949 static void
|
|
665
|
1950 map_extents_bytebpos (Bytebpos from, Bytebpos to, map_extents_fun fn, void *arg,
|
|
428
|
1951 Lisp_Object obj, EXTENT after, unsigned int flags)
|
|
|
1952 {
|
|
665
|
1953 Membpos st, en; /* range we're mapping over */
|
|
428
|
1954 EXTENT range = 0; /* extent for this, if ME_MIGHT_MODIFY_TEXT */
|
|
|
1955 Extent_List *el = 0; /* extent list we're iterating over */
|
|
|
1956 Extent_List_Marker *posm = 0; /* marker for extent list,
|
|
|
1957 if ME_MIGHT_MODIFY_EXTENTS */
|
|
|
1958 /* count and struct for unwind-protect, if ME_MIGHT_THROW */
|
|
|
1959 int count = 0;
|
|
|
1960 struct map_extents_struct closure;
|
|
|
1961
|
|
|
1962 #ifdef ERROR_CHECK_EXTENTS
|
|
|
1963 assert (from <= to);
|
|
|
1964 assert (from >= buffer_or_string_absolute_begin_byte (obj) &&
|
|
|
1965 from <= buffer_or_string_absolute_end_byte (obj) &&
|
|
|
1966 to >= buffer_or_string_absolute_begin_byte (obj) &&
|
|
|
1967 to <= buffer_or_string_absolute_end_byte (obj));
|
|
|
1968 #endif
|
|
|
1969
|
|
|
1970 if (after)
|
|
|
1971 {
|
|
|
1972 assert (EQ (obj, extent_object (after)));
|
|
|
1973 assert (!extent_detached_p (after));
|
|
|
1974 }
|
|
|
1975
|
|
|
1976 el = buffer_or_string_extent_list (obj);
|
|
|
1977 if (!el || !extent_list_num_els(el))
|
|
|
1978 return;
|
|
|
1979 el = 0;
|
|
|
1980
|
|
665
|
1981 st = buffer_or_string_bytebpos_to_membpos (obj, from);
|
|
|
1982 en = buffer_or_string_bytebpos_to_membpos (obj, to);
|
|
428
|
1983
|
|
|
1984 if (flags & ME_MIGHT_MODIFY_TEXT)
|
|
|
1985 {
|
|
|
1986 /* The mapping function might change the text in the buffer,
|
|
|
1987 so make an internal extent to hold the range we're mapping
|
|
|
1988 over. */
|
|
|
1989 range = make_extent_detached (obj);
|
|
|
1990 set_extent_start (range, st);
|
|
|
1991 set_extent_end (range, en);
|
|
|
1992 range->flags.start_open = flags & ME_START_OPEN;
|
|
|
1993 range->flags.end_open = !(flags & ME_END_CLOSED);
|
|
|
1994 range->flags.internal = 1;
|
|
|
1995 range->flags.detachable = 0;
|
|
|
1996 extent_attach (range);
|
|
|
1997 }
|
|
|
1998
|
|
|
1999 if (flags & ME_MIGHT_THROW)
|
|
|
2000 {
|
|
|
2001 /* The mapping function might throw past us so we need to use an
|
|
|
2002 unwind_protect() to eliminate the internal extent and range
|
|
|
2003 that we use. */
|
|
|
2004 count = specpdl_depth ();
|
|
|
2005 closure.range = range;
|
|
|
2006 closure.mkr = 0;
|
|
|
2007 record_unwind_protect (map_extents_unwind,
|
|
|
2008 make_opaque_ptr (&closure));
|
|
|
2009 }
|
|
|
2010
|
|
|
2011 /* ---------- Figure out where we start and what direction
|
|
|
2012 we move in. This is the trickiest part of this
|
|
|
2013 function. ---------- */
|
|
|
2014
|
|
|
2015 /* If ME_START_IN_REGION, ME_END_IN_REGION or ME_START_AND_END_IN_REGION
|
|
|
2016 was specified and ME_NEGATE_IN_REGION was not specified, our job
|
|
|
2017 is simple because of the presence of the display order and e-order.
|
|
|
2018 (Note that theoretically do something similar for
|
|
|
2019 ME_START_OR_END_IN_REGION, but that would require more trickiness
|
|
|
2020 than it's worth to avoid hitting the same extent twice.)
|
|
|
2021
|
|
|
2022 In the general case, all the extents that overlap a range can be
|
|
|
2023 divided into two classes: those whose start position lies within
|
|
|
2024 the range (including the range's end but not including the
|
|
|
2025 range's start), and those that overlap the start position,
|
|
|
2026 i.e. those in the SOE for the start position. Or equivalently,
|
|
|
2027 the extents can be divided into those whose end position lies
|
|
|
2028 within the range and those in the SOE for the end position. Note
|
|
|
2029 that for this purpose we treat both the range and all extents in
|
|
|
2030 the buffer as closed on both ends. If this is not what the ME_
|
|
|
2031 flags specified, then we've mapped over a few too many extents,
|
|
|
2032 but no big deal because extent_in_region_p() will filter them
|
|
|
2033 out. Ideally, we could move the SOE to the closer of the range's
|
|
|
2034 two ends and work forwards or backwards from there. However, in
|
|
|
2035 order to make the semantics of the AFTER argument work out, we
|
|
|
2036 have to always go in the same direction; so we choose to always
|
|
|
2037 move the SOE to the start position.
|
|
|
2038
|
|
|
2039 When it comes time to do the SOE stage, we first call soe_move()
|
|
|
2040 so that the SOE gets set up. Note that the SOE might get
|
|
|
2041 changed while we are mapping over its contents. If we can
|
|
|
2042 guarantee that the SOE won't get moved to a new position, we
|
|
|
2043 simply need to put a marker in the SOE and we will track deletions
|
|
|
2044 and insertions of extents in the SOE. If the SOE might get moved,
|
|
|
2045 however (this would happen as a result of a recursive invocation
|
|
|
2046 of map-extents or a call to a redisplay-type function), then
|
|
|
2047 trying to track its changes is hopeless, so we just keep a
|
|
|
2048 marker to the first (or last) extent in the SOE and use that as
|
|
|
2049 our bound.
|
|
|
2050
|
|
|
2051 Finally, if DONT_USE_SOE is defined, we don't use the SOE at all
|
|
|
2052 and instead just map from the beginning of the buffer. This is
|
|
|
2053 used for testing purposes and allows the SOE to be calculated
|
|
|
2054 using map_extents() instead of the other way around. */
|
|
|
2055
|
|
|
2056 {
|
|
|
2057 int range_flag; /* ME_*_IN_REGION subset of flags */
|
|
|
2058 int do_soe_stage = 0; /* Are we mapping over the SOE? */
|
|
|
2059 /* Does the range stage map over start or end positions? */
|
|
|
2060 int range_endp;
|
|
|
2061 /* If type == 0, we include the start position in the range stage mapping.
|
|
|
2062 If type == 1, we exclude the start position in the range stage mapping.
|
|
|
2063 If type == 2, we begin at range_start_pos, an extent-list position.
|
|
|
2064 */
|
|
|
2065 int range_start_type = 0;
|
|
|
2066 int range_start_pos = 0;
|
|
|
2067 int stage;
|
|
|
2068
|
|
|
2069 range_flag = flags & ME_IN_REGION_MASK;
|
|
|
2070 if ((range_flag == ME_START_IN_REGION ||
|
|
|
2071 range_flag == ME_START_AND_END_IN_REGION) &&
|
|
|
2072 !(flags & ME_NEGATE_IN_REGION))
|
|
|
2073 {
|
|
|
2074 /* map over start position in [range-start, range-end]. No SOE
|
|
|
2075 stage. */
|
|
|
2076 range_endp = 0;
|
|
|
2077 }
|
|
|
2078 else if (range_flag == ME_END_IN_REGION && !(flags & ME_NEGATE_IN_REGION))
|
|
|
2079 {
|
|
|
2080 /* map over end position in [range-start, range-end]. No SOE
|
|
|
2081 stage. */
|
|
|
2082 range_endp = 1;
|
|
|
2083 }
|
|
|
2084 else
|
|
|
2085 {
|
|
|
2086 /* Need to include the SOE extents. */
|
|
|
2087 #ifdef DONT_USE_SOE
|
|
|
2088 /* Just brute-force it: start from the beginning. */
|
|
|
2089 range_endp = 0;
|
|
|
2090 range_start_type = 2;
|
|
|
2091 range_start_pos = 0;
|
|
|
2092 #else
|
|
|
2093 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents_force (obj);
|
|
|
2094 int numsoe;
|
|
|
2095
|
|
|
2096 /* Move the SOE to the closer end of the range. This dictates
|
|
|
2097 whether we map over start positions or end positions. */
|
|
|
2098 range_endp = 0;
|
|
|
2099 soe_move (obj, st);
|
|
|
2100 numsoe = extent_list_num_els (soe->extents);
|
|
|
2101 if (numsoe)
|
|
|
2102 {
|
|
|
2103 if (flags & ME_MIGHT_MOVE_SOE)
|
|
|
2104 {
|
|
|
2105 int foundp;
|
|
|
2106 /* Can't map over SOE, so just extend range to cover the
|
|
|
2107 SOE. */
|
|
|
2108 EXTENT e = extent_list_at (soe->extents, 0, 0);
|
|
|
2109 range_start_pos =
|
|
|
2110 extent_list_locate (buffer_or_string_extent_list (obj), e, 0,
|
|
|
2111 &foundp);
|
|
|
2112 assert (foundp);
|
|
|
2113 range_start_type = 2;
|
|
|
2114 }
|
|
|
2115 else
|
|
|
2116 {
|
|
|
2117 /* We can map over the SOE. */
|
|
|
2118 do_soe_stage = 1;
|
|
|
2119 range_start_type = 1;
|
|
|
2120 }
|
|
|
2121 }
|
|
|
2122 else
|
|
|
2123 {
|
|
|
2124 /* No extents in the SOE to map over, so we act just as if
|
|
|
2125 ME_START_IN_REGION or ME_END_IN_REGION was specified.
|
|
|
2126 RANGE_ENDP already specified so no need to do anything else. */
|
|
|
2127 }
|
|
|
2128 }
|
|
|
2129 #endif
|
|
|
2130
|
|
|
2131 /* ---------- Now loop over the extents. ---------- */
|
|
|
2132
|
|
|
2133 /* We combine the code for the two stages because much of it
|
|
|
2134 overlaps. */
|
|
|
2135 for (stage = 0; stage < 2; stage++)
|
|
|
2136 {
|
|
|
2137 int pos = 0; /* Position in extent list */
|
|
|
2138
|
|
|
2139 /* First set up start conditions */
|
|
|
2140 if (stage == 0)
|
|
|
2141 { /* The SOE stage */
|
|
|
2142 if (!do_soe_stage)
|
|
|
2143 continue;
|
|
|
2144 el = buffer_or_string_stack_of_extents_force (obj)->extents;
|
|
|
2145 /* We will always be looping over start extents here. */
|
|
|
2146 assert (!range_endp);
|
|
|
2147 pos = 0;
|
|
|
2148 }
|
|
|
2149 else
|
|
|
2150 { /* The range stage */
|
|
|
2151 el = buffer_or_string_extent_list (obj);
|
|
|
2152 switch (range_start_type)
|
|
|
2153 {
|
|
|
2154 case 0:
|
|
|
2155 pos = extent_list_locate_from_pos (el, st, range_endp);
|
|
|
2156 break;
|
|
|
2157 case 1:
|
|
|
2158 pos = extent_list_locate_from_pos (el, st + 1, range_endp);
|
|
|
2159 break;
|
|
|
2160 case 2:
|
|
|
2161 pos = range_start_pos;
|
|
|
2162 break;
|
|
|
2163 }
|
|
|
2164 }
|
|
|
2165
|
|
|
2166 if (flags & ME_MIGHT_MODIFY_EXTENTS)
|
|
|
2167 {
|
|
|
2168 /* Create a marker to track changes to the extent list */
|
|
|
2169 if (posm)
|
|
|
2170 /* Delete the marker used in the SOE stage. */
|
|
|
2171 extent_list_delete_marker
|
|
|
2172 (buffer_or_string_stack_of_extents_force (obj)->extents, posm);
|
|
|
2173 posm = extent_list_make_marker (el, pos, range_endp);
|
|
|
2174 /* tell the unwind function about the marker. */
|
|
|
2175 closure.el = el;
|
|
|
2176 closure.mkr = posm;
|
|
|
2177 }
|
|
|
2178
|
|
|
2179 /* Now loop! */
|
|
|
2180 for (;;)
|
|
|
2181 {
|
|
|
2182 EXTENT e;
|
|
|
2183 Lisp_Object obj2;
|
|
|
2184
|
|
|
2185 /* ----- update position in extent list
|
|
|
2186 and fetch next extent ----- */
|
|
|
2187
|
|
|
2188 if (posm)
|
|
|
2189 /* fetch POS again to track extent insertions or deletions */
|
|
|
2190 pos = extent_list_marker_pos (el, posm);
|
|
|
2191 if (pos >= extent_list_num_els (el))
|
|
|
2192 break;
|
|
|
2193 e = extent_list_at (el, pos, range_endp);
|
|
|
2194 pos++;
|
|
|
2195 if (posm)
|
|
|
2196 /* now point the marker to the next one we're going to process.
|
|
|
2197 This ensures graceful behavior if this extent is deleted. */
|
|
|
2198 extent_list_move_marker (el, posm, pos);
|
|
|
2199
|
|
|
2200 /* ----- deal with internal extents ----- */
|
|
|
2201
|
|
|
2202 if (extent_internal_p (e))
|
|
|
2203 {
|
|
|
2204 if (!(flags & ME_INCLUDE_INTERNAL))
|
|
|
2205 continue;
|
|
|
2206 else if (e == range)
|
|
|
2207 {
|
|
|
2208 /* We're processing internal extents and we've
|
|
|
2209 come across our own special range extent.
|
|
|
2210 (This happens only in adjust_extents*() and
|
|
|
2211 process_extents*(), which handle text
|
|
|
2212 insertion and deletion.) We need to omit
|
|
|
2213 processing of this extent; otherwise
|
|
|
2214 we will probably end up prematurely
|
|
|
2215 terminating this loop. */
|
|
|
2216 continue;
|
|
|
2217 }
|
|
|
2218 }
|
|
|
2219
|
|
|
2220 /* ----- deal with AFTER condition ----- */
|
|
|
2221
|
|
|
2222 if (after)
|
|
|
2223 {
|
|
|
2224 /* if e > after, then we can stop skipping extents. */
|
|
|
2225 if (EXTENT_LESS (after, e))
|
|
|
2226 after = 0;
|
|
|
2227 else /* otherwise, skip this extent. */
|
|
|
2228 continue;
|
|
|
2229 }
|
|
|
2230
|
|
|
2231 /* ----- stop if we're completely outside the range ----- */
|
|
|
2232
|
|
|
2233 /* fetch ST and EN again to track text insertions or deletions */
|
|
|
2234 if (range)
|
|
|
2235 {
|
|
|
2236 st = extent_start (range);
|
|
|
2237 en = extent_end (range);
|
|
|
2238 }
|
|
|
2239 if (extent_endpoint (e, range_endp) > en)
|
|
|
2240 {
|
|
|
2241 /* Can't be mapping over SOE because all extents in
|
|
|
2242 there should overlap ST */
|
|
|
2243 assert (stage == 1);
|
|
|
2244 break;
|
|
|
2245 }
|
|
|
2246
|
|
|
2247 /* ----- Now actually call the function ----- */
|
|
|
2248
|
|
|
2249 obj2 = extent_object (e);
|
|
|
2250 if (extent_in_region_p (e,
|
|
665
|
2251 buffer_or_string_membpos_to_bytebpos (obj2,
|
|
428
|
2252 st),
|
|
665
|
2253 buffer_or_string_membpos_to_bytebpos (obj2,
|
|
428
|
2254 en),
|
|
|
2255 flags))
|
|
|
2256 {
|
|
|
2257 if ((*fn)(e, arg))
|
|
|
2258 {
|
|
|
2259 /* Function wants us to stop mapping. */
|
|
|
2260 stage = 1; /* so outer for loop will terminate */
|
|
|
2261 break;
|
|
|
2262 }
|
|
|
2263 }
|
|
|
2264 }
|
|
|
2265 }
|
|
|
2266 /* ---------- Finished looping. ---------- */
|
|
|
2267 }
|
|
|
2268
|
|
|
2269 if (flags & ME_MIGHT_THROW)
|
|
|
2270 /* This deletes the range extent and frees the marker. */
|
|
|
2271 unbind_to (count, Qnil);
|
|
|
2272 else
|
|
|
2273 {
|
|
|
2274 /* Delete them ourselves */
|
|
|
2275 if (range)
|
|
|
2276 extent_detach (range);
|
|
|
2277 if (posm)
|
|
|
2278 extent_list_delete_marker (el, posm);
|
|
|
2279 }
|
|
|
2280 }
|
|
|
2281
|
|
|
2282 void
|
|
665
|
2283 map_extents (Charbpos from, Charbpos to, map_extents_fun fn,
|
|
428
|
2284 void *arg, Lisp_Object obj, EXTENT after, unsigned int flags)
|
|
|
2285 {
|
|
665
|
2286 map_extents_bytebpos (buffer_or_string_charbpos_to_bytebpos (obj, from),
|
|
|
2287 buffer_or_string_charbpos_to_bytebpos (obj, to), fn, arg,
|
|
428
|
2288 obj, after, flags);
|
|
|
2289 }
|
|
|
2290
|
|
|
2291 /* ------------------------------- */
|
|
|
2292 /* adjust_extents() */
|
|
|
2293 /* ------------------------------- */
|
|
|
2294
|
|
|
2295 /* Add AMOUNT to all extent endpoints in the range (FROM, TO]. This
|
|
|
2296 happens whenever the gap is moved or (under Mule) a character in a
|
|
|
2297 string is substituted for a different-length one. The reason for
|
|
|
2298 this is that extent endpoints behave just like markers (all memory
|
|
|
2299 indices do) and this adjustment correct for markers -- see
|
|
|
2300 adjust_markers(). Note that it is important that we visit all
|
|
|
2301 extent endpoints in the range, irrespective of whether the
|
|
|
2302 endpoints are open or closed.
|
|
|
2303
|
|
|
2304 We could use map_extents() for this (and in fact the function
|
|
|
2305 was originally written that way), but the gap is in an incoherent
|
|
|
2306 state when this function is called and this function plays
|
|
|
2307 around with extent endpoints without detaching and reattaching
|
|
|
2308 the extents (this is provably correct and saves lots of time),
|
|
|
2309 so for safety we make it just look at the extent lists directly. */
|
|
|
2310
|
|
|
2311 void
|
|
665
|
2312 adjust_extents (Lisp_Object obj, Membpos from, Membpos to, int amount)
|
|
428
|
2313 {
|
|
|
2314 int endp;
|
|
|
2315 int pos;
|
|
|
2316 int startpos[2];
|
|
|
2317 Extent_List *el;
|
|
|
2318 Stack_Of_Extents *soe;
|
|
|
2319
|
|
|
2320 #ifdef ERROR_CHECK_EXTENTS
|
|
|
2321 sledgehammer_extent_check (obj);
|
|
|
2322 #endif
|
|
|
2323 el = buffer_or_string_extent_list (obj);
|
|
|
2324
|
|
|
2325 if (!el || !extent_list_num_els(el))
|
|
|
2326 return;
|
|
|
2327
|
|
|
2328 /* IMPORTANT! Compute the starting positions of the extents to
|
|
|
2329 modify BEFORE doing any modification! Otherwise the starting
|
|
|
2330 position for the second time through the loop might get
|
|
|
2331 incorrectly calculated (I got bit by this bug real bad). */
|
|
|
2332 startpos[0] = extent_list_locate_from_pos (el, from+1, 0);
|
|
|
2333 startpos[1] = extent_list_locate_from_pos (el, from+1, 1);
|
|
|
2334 for (endp = 0; endp < 2; endp++)
|
|
|
2335 {
|
|
|
2336 for (pos = startpos[endp]; pos < extent_list_num_els (el);
|
|
|
2337 pos++)
|
|
|
2338 {
|
|
|
2339 EXTENT e = extent_list_at (el, pos, endp);
|
|
|
2340 if (extent_endpoint (e, endp) > to)
|
|
|
2341 break;
|
|
|
2342 set_extent_endpoint (e,
|
|
|
2343 do_marker_adjustment (extent_endpoint (e, endp),
|
|
|
2344 from, to, amount),
|
|
|
2345 endp);
|
|
|
2346 }
|
|
|
2347 }
|
|
|
2348
|
|
|
2349 /* The index for the buffer's SOE is a memory index and thus
|
|
|
2350 needs to be adjusted like a marker. */
|
|
|
2351 soe = buffer_or_string_stack_of_extents (obj);
|
|
|
2352 if (soe && soe->pos >= 0)
|
|
|
2353 soe->pos = do_marker_adjustment (soe->pos, from, to, amount);
|
|
|
2354 }
|
|
|
2355
|
|
|
2356 /* ------------------------------- */
|
|
|
2357 /* adjust_extents_for_deletion() */
|
|
|
2358 /* ------------------------------- */
|
|
|
2359
|
|
|
2360 struct adjust_extents_for_deletion_arg
|
|
|
2361 {
|
|
|
2362 EXTENT_dynarr *list;
|
|
|
2363 };
|
|
|
2364
|
|
|
2365 static int
|
|
|
2366 adjust_extents_for_deletion_mapper (EXTENT extent, void *arg)
|
|
|
2367 {
|
|
|
2368 struct adjust_extents_for_deletion_arg *closure =
|
|
|
2369 (struct adjust_extents_for_deletion_arg *) arg;
|
|
|
2370
|
|
|
2371 Dynarr_add (closure->list, extent);
|
|
|
2372 return 0; /* continue mapping */
|
|
|
2373 }
|
|
|
2374
|
|
|
2375 /* For all extent endpoints in the range (FROM, TO], move them to the beginning
|
|
|
2376 of the new gap. Note that it is important that we visit all extent
|
|
|
2377 endpoints in the range, irrespective of whether the endpoints are open or
|
|
|
2378 closed.
|
|
|
2379
|
|
|
2380 This function deals with weird stuff such as the fact that extents
|
|
|
2381 may get reordered.
|
|
|
2382
|
|
|
2383 There is no string correspondent for this because you can't
|
|
|
2384 delete characters from a string.
|
|
|
2385 */
|
|
|
2386
|
|
|
2387 void
|
|
665
|
2388 adjust_extents_for_deletion (Lisp_Object object, Bytebpos from,
|
|
|
2389 Bytebpos to, int gapsize, int numdel,
|
|
428
|
2390 int movegapsize)
|
|
|
2391 {
|
|
|
2392 struct adjust_extents_for_deletion_arg closure;
|
|
|
2393 int i;
|
|
665
|
2394 Membpos adjust_to = (Membpos) (to + gapsize);
|
|
428
|
2395 Bytecount amount = - numdel - movegapsize;
|
|
665
|
2396 Membpos oldsoe = 0, newsoe = 0;
|
|
428
|
2397 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (object);
|
|
|
2398
|
|
|
2399 #ifdef ERROR_CHECK_EXTENTS
|
|
|
2400 sledgehammer_extent_check (object);
|
|
|
2401 #endif
|
|
|
2402 closure.list = Dynarr_new (EXTENT);
|
|
|
2403
|
|
|
2404 /* We're going to be playing weird games below with extents and the SOE
|
|
|
2405 and such, so compute the list now of all the extents that we're going
|
|
|
2406 to muck with. If we do the mapping and adjusting together, things can
|
|
|
2407 get all screwed up. */
|
|
|
2408
|
|
665
|
2409 map_extents_bytebpos (from, to, adjust_extents_for_deletion_mapper,
|
|
428
|
2410 (void *) &closure, object, 0,
|
|
|
2411 /* extent endpoints move like markers regardless
|
|
|
2412 of their open/closeness. */
|
|
|
2413 ME_ALL_EXTENTS_CLOSED | ME_END_CLOSED |
|
|
|
2414 ME_START_OR_END_IN_REGION | ME_INCLUDE_INTERNAL);
|
|
|
2415
|
|
|
2416 /*
|
|
|
2417 Old and new values for the SOE's position. (It gets adjusted
|
|
|
2418 like a marker, just like extent endpoints.)
|
|
|
2419 */
|
|
|
2420
|
|
|
2421 if (soe)
|
|
|
2422 {
|
|
|
2423 oldsoe = soe->pos;
|
|
|
2424 if (soe->pos >= 0)
|
|
|
2425 newsoe = do_marker_adjustment (soe->pos,
|
|
|
2426 adjust_to, adjust_to,
|
|
|
2427 amount);
|
|
|
2428 else
|
|
|
2429 newsoe = soe->pos;
|
|
|
2430 }
|
|
|
2431
|
|
|
2432 for (i = 0; i < Dynarr_length (closure.list); i++)
|
|
|
2433 {
|
|
|
2434 EXTENT extent = Dynarr_at (closure.list, i);
|
|
665
|
2435 Membpos new_start = extent_start (extent);
|
|
|
2436 Membpos new_end = extent_end (extent);
|
|
428
|
2437
|
|
|
2438 /* do_marker_adjustment() will not adjust values that should not be
|
|
|
2439 adjusted. We're passing the same funky arguments to
|
|
|
2440 do_marker_adjustment() as buffer_delete_range() does. */
|
|
|
2441 new_start =
|
|
|
2442 do_marker_adjustment (new_start,
|
|
|
2443 adjust_to, adjust_to,
|
|
|
2444 amount);
|
|
|
2445 new_end =
|
|
|
2446 do_marker_adjustment (new_end,
|
|
|
2447 adjust_to, adjust_to,
|
|
|
2448 amount);
|
|
|
2449
|
|
|
2450 /* We need to be very careful here so that the SOE doesn't get
|
|
|
2451 corrupted. We are shrinking extents out of the deleted region
|
|
|
2452 and simultaneously moving the SOE's pos out of the deleted
|
|
|
2453 region, so the SOE should contain the same extents at the end
|
|
|
2454 as at the beginning. However, extents may get reordered
|
|
|
2455 by this process, so we have to operate by pulling the extents
|
|
|
2456 out of the buffer and SOE, changing their bounds, and then
|
|
|
2457 reinserting them. In order for the SOE not to get screwed up,
|
|
|
2458 we have to make sure that the SOE's pos points to its old
|
|
|
2459 location whenever we pull an extent out, and points to its
|
|
|
2460 new location whenever we put the extent back in.
|
|
|
2461 */
|
|
|
2462
|
|
|
2463 if (new_start != extent_start (extent) ||
|
|
|
2464 new_end != extent_end (extent))
|
|
|
2465 {
|
|
|
2466 extent_detach (extent);
|
|
|
2467 set_extent_start (extent, new_start);
|
|
|
2468 set_extent_end (extent, new_end);
|
|
|
2469 if (soe)
|
|
|
2470 soe->pos = newsoe;
|
|
|
2471 extent_attach (extent);
|
|
|
2472 if (soe)
|
|
|
2473 soe->pos = oldsoe;
|
|
|
2474 }
|
|
|
2475 }
|
|
|
2476
|
|
|
2477 if (soe)
|
|
|
2478 soe->pos = newsoe;
|
|
|
2479
|
|
|
2480 #ifdef ERROR_CHECK_EXTENTS
|
|
|
2481 sledgehammer_extent_check (object);
|
|
|
2482 #endif
|
|
|
2483 Dynarr_free (closure.list);
|
|
|
2484 }
|
|
|
2485
|
|
|
2486 /* ------------------------------- */
|
|
|
2487 /* extent fragments */
|
|
|
2488 /* ------------------------------- */
|
|
|
2489
|
|
|
2490 /* Imagine that the buffer is divided up into contiguous,
|
|
|
2491 nonoverlapping "runs" of text such that no extent
|
|
|
2492 starts or ends within a run (extents that abut the
|
|
|
2493 run don't count).
|
|
|
2494
|
|
|
2495 An extent fragment is a structure that holds data about
|
|
|
2496 the run that contains a particular buffer position (if
|
|
|
2497 the buffer position is at the junction of two runs, the
|
|
|
2498 run after the position is used) -- the beginning and
|
|
|
2499 end of the run, a list of all of the extents in that
|
|
|
2500 run, the "merged face" that results from merging all of
|
|
|
2501 the faces corresponding to those extents, the begin and
|
|
|
2502 end glyphs at the beginning of the run, etc. This is
|
|
|
2503 the information that redisplay needs in order to
|
|
|
2504 display this run.
|
|
|
2505
|
|
|
2506 Extent fragments have to be very quick to update to
|
|
|
2507 a new buffer position when moving linearly through
|
|
|
2508 the buffer. They rely on the stack-of-extents code,
|
|
|
2509 which does the heavy-duty algorithmic work of determining
|
|
|
2510 which extents overly a particular position. */
|
|
|
2511
|
|
|
2512 /* This function returns the position of the beginning of
|
|
|
2513 the first run that begins after POS, or returns POS if
|
|
|
2514 there are no such runs. */
|
|
|
2515
|
|
665
|
2516 static Bytebpos
|
|
|
2517 extent_find_end_of_run (Lisp_Object obj, Bytebpos pos, int outside_accessible)
|
|
428
|
2518 {
|
|
|
2519 Extent_List *sel;
|
|
|
2520 Extent_List *bel = buffer_or_string_extent_list (obj);
|
|
665
|
2521 Bytebpos pos1, pos2;
|
|
428
|
2522 int elind1, elind2;
|
|
665
|
2523 Membpos mempos = buffer_or_string_bytebpos_to_membpos (obj, pos);
|
|
|
2524 Bytebpos limit = outside_accessible ?
|
|
428
|
2525 buffer_or_string_absolute_end_byte (obj) :
|
|
|
2526 buffer_or_string_accessible_end_byte (obj);
|
|
|
2527
|
|
|
2528 if (!bel || !extent_list_num_els(bel))
|
|
|
2529 return limit;
|
|
|
2530
|
|
|
2531 sel = buffer_or_string_stack_of_extents_force (obj)->extents;
|
|
|
2532 soe_move (obj, mempos);
|
|
|
2533
|
|
|
2534 /* Find the first start position after POS. */
|
|
|
2535 elind1 = extent_list_locate_from_pos (bel, mempos+1, 0);
|
|
|
2536 if (elind1 < extent_list_num_els (bel))
|
|
665
|
2537 pos1 = buffer_or_string_membpos_to_bytebpos
|
|
428
|
2538 (obj, extent_start (extent_list_at (bel, elind1, 0)));
|
|
|
2539 else
|
|
|
2540 pos1 = limit;
|
|
|
2541
|
|
|
2542 /* Find the first end position after POS. The extent corresponding
|
|
|
2543 to this position is either in the SOE or is greater than or
|
|
|
2544 equal to POS1, so we just have to look in the SOE. */
|
|
|
2545 elind2 = extent_list_locate_from_pos (sel, mempos+1, 1);
|
|
|
2546 if (elind2 < extent_list_num_els (sel))
|
|
665
|
2547 pos2 = buffer_or_string_membpos_to_bytebpos
|
|
428
|
2548 (obj, extent_end (extent_list_at (sel, elind2, 1)));
|
|
|
2549 else
|
|
|
2550 pos2 = limit;
|
|
|
2551
|
|
|
2552 return min (min (pos1, pos2), limit);
|
|
|
2553 }
|
|
|
2554
|
|
665
|
2555 static Bytebpos
|
|
|
2556 extent_find_beginning_of_run (Lisp_Object obj, Bytebpos pos,
|
|
428
|
2557 int outside_accessible)
|
|
|
2558 {
|
|
|
2559 Extent_List *sel;
|
|
|
2560 Extent_List *bel = buffer_or_string_extent_list (obj);
|
|
665
|
2561 Bytebpos pos1, pos2;
|
|
428
|
2562 int elind1, elind2;
|
|
665
|
2563 Membpos mempos = buffer_or_string_bytebpos_to_membpos (obj, pos);
|
|
|
2564 Bytebpos limit = outside_accessible ?
|
|
428
|
2565 buffer_or_string_absolute_begin_byte (obj) :
|
|
|
2566 buffer_or_string_accessible_begin_byte (obj);
|
|
|
2567
|
|
|
2568 if (!bel || !extent_list_num_els(bel))
|
|
|
2569 return limit;
|
|
|
2570
|
|
|
2571 sel = buffer_or_string_stack_of_extents_force (obj)->extents;
|
|
|
2572 soe_move (obj, mempos);
|
|
|
2573
|
|
|
2574 /* Find the first end position before POS. */
|
|
|
2575 elind1 = extent_list_locate_from_pos (bel, mempos, 1);
|
|
|
2576 if (elind1 > 0)
|
|
665
|
2577 pos1 = buffer_or_string_membpos_to_bytebpos
|
|
428
|
2578 (obj, extent_end (extent_list_at (bel, elind1 - 1, 1)));
|
|
|
2579 else
|
|
|
2580 pos1 = limit;
|
|
|
2581
|
|
|
2582 /* Find the first start position before POS. The extent corresponding
|
|
|
2583 to this position is either in the SOE or is less than or
|
|
|
2584 equal to POS1, so we just have to look in the SOE. */
|
|
|
2585 elind2 = extent_list_locate_from_pos (sel, mempos, 0);
|
|
|
2586 if (elind2 > 0)
|
|
665
|
2587 pos2 = buffer_or_string_membpos_to_bytebpos
|
|
428
|
2588 (obj, extent_start (extent_list_at (sel, elind2 - 1, 0)));
|
|
|
2589 else
|
|
|
2590 pos2 = limit;
|
|
|
2591
|
|
|
2592 return max (max (pos1, pos2), limit);
|
|
|
2593 }
|
|
|
2594
|
|
|
2595 struct extent_fragment *
|
|
|
2596 extent_fragment_new (Lisp_Object buffer_or_string, struct frame *frm)
|
|
|
2597 {
|
|
|
2598 struct extent_fragment *ef = xnew_and_zero (struct extent_fragment);
|
|
|
2599
|
|
|
2600 ef->object = buffer_or_string;
|
|
|
2601 ef->frm = frm;
|
|
|
2602 ef->extents = Dynarr_new (EXTENT);
|
|
|
2603 ef->begin_glyphs = Dynarr_new (glyph_block);
|
|
|
2604 ef->end_glyphs = Dynarr_new (glyph_block);
|
|
|
2605
|
|
|
2606 return ef;
|
|
|
2607 }
|
|
|
2608
|
|
|
2609 void
|
|
|
2610 extent_fragment_delete (struct extent_fragment *ef)
|
|
|
2611 {
|
|
|
2612 Dynarr_free (ef->extents);
|
|
|
2613 Dynarr_free (ef->begin_glyphs);
|
|
|
2614 Dynarr_free (ef->end_glyphs);
|
|
|
2615 xfree (ef);
|
|
|
2616 }
|
|
|
2617
|
|
|
2618 static int
|
|
|
2619 extent_priority_sort_function (const void *humpty, const void *dumpty)
|
|
|
2620 {
|
|
442
|
2621 const EXTENT foo = * (const EXTENT *) humpty;
|
|
|
2622 const EXTENT bar = * (const EXTENT *) dumpty;
|
|
428
|
2623 if (extent_priority (foo) < extent_priority (bar))
|
|
|
2624 return -1;
|
|
|
2625 return extent_priority (foo) > extent_priority (bar);
|
|
|
2626 }
|
|
|
2627
|
|
|
2628 static void
|
|
|
2629 extent_fragment_sort_by_priority (EXTENT_dynarr *extarr)
|
|
|
2630 {
|
|
|
2631 int i;
|
|
|
2632
|
|
|
2633 /* Sort our copy of the stack by extent_priority. We use a bubble
|
|
|
2634 sort here because it's going to be faster than qsort() for small
|
|
|
2635 numbers of extents (less than 10 or so), and 99.999% of the time
|
|
|
2636 there won't ever be more extents than this in the stack. */
|
|
|
2637 if (Dynarr_length (extarr) < 10)
|
|
|
2638 {
|
|
|
2639 for (i = 1; i < Dynarr_length (extarr); i++)
|
|
|
2640 {
|
|
|
2641 int j = i - 1;
|
|
|
2642 while (j >= 0 &&
|
|
|
2643 (extent_priority (Dynarr_at (extarr, j)) >
|
|
|
2644 extent_priority (Dynarr_at (extarr, j+1))))
|
|
|
2645 {
|
|
|
2646 EXTENT tmp = Dynarr_at (extarr, j);
|
|
|
2647 Dynarr_at (extarr, j) = Dynarr_at (extarr, j+1);
|
|
|
2648 Dynarr_at (extarr, j+1) = tmp;
|
|
|
2649 j--;
|
|
|
2650 }
|
|
|
2651 }
|
|
|
2652 }
|
|
|
2653 else
|
|
|
2654 /* But some loser programs mess up and may create a large number
|
|
|
2655 of extents overlapping the same spot. This will result in
|
|
|
2656 catastrophic behavior if we use the bubble sort above. */
|
|
|
2657 qsort (Dynarr_atp (extarr, 0), Dynarr_length (extarr),
|
|
|
2658 sizeof (EXTENT), extent_priority_sort_function);
|
|
|
2659 }
|
|
|
2660
|
|
|
2661 /* If PROP is the `invisible' property of an extent,
|
|
|
2662 this is 1 if the extent should be treated as invisible. */
|
|
|
2663
|
|
|
2664 #define EXTENT_PROP_MEANS_INVISIBLE(buf, prop) \
|
|
|
2665 (EQ (buf->invisibility_spec, Qt) \
|
|
|
2666 ? ! NILP (prop) \
|
|
|
2667 : invisible_p (prop, buf->invisibility_spec))
|
|
|
2668
|
|
|
2669 /* If PROP is the `invisible' property of a extent,
|
|
|
2670 this is 1 if the extent should be treated as invisible
|
|
|
2671 and should have an ellipsis. */
|
|
|
2672
|
|
|
2673 #define EXTENT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS(buf, prop) \
|
|
|
2674 (EQ (buf->invisibility_spec, Qt) \
|
|
|
2675 ? 0 \
|
|
|
2676 : invisible_ellipsis_p (prop, buf->invisibility_spec))
|
|
|
2677
|
|
|
2678 /* This is like a combination of memq and assq.
|
|
|
2679 Return 1 if PROPVAL appears as an element of LIST
|
|
|
2680 or as the car of an element of LIST.
|
|
|
2681 If PROPVAL is a list, compare each element against LIST
|
|
|
2682 in that way, and return 1 if any element of PROPVAL is found in LIST.
|
|
|
2683 Otherwise return 0.
|
|
|
2684 This function cannot quit. */
|
|
|
2685
|
|
|
2686 static int
|
|
|
2687 invisible_p (REGISTER Lisp_Object propval, Lisp_Object list)
|
|
|
2688 {
|
|
|
2689 REGISTER Lisp_Object tail, proptail;
|
|
|
2690 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
2691 {
|
|
|
2692 REGISTER Lisp_Object tem;
|
|
|
2693 tem = XCAR (tail);
|
|
|
2694 if (EQ (propval, tem))
|
|
|
2695 return 1;
|
|
|
2696 if (CONSP (tem) && EQ (propval, XCAR (tem)))
|
|
|
2697 return 1;
|
|
|
2698 }
|
|
|
2699 if (CONSP (propval))
|
|
|
2700 for (proptail = propval; CONSP (proptail);
|
|
|
2701 proptail = XCDR (proptail))
|
|
|
2702 {
|
|
|
2703 Lisp_Object propelt;
|
|
|
2704 propelt = XCAR (proptail);
|
|
|
2705 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
2706 {
|
|
|
2707 REGISTER Lisp_Object tem;
|
|
|
2708 tem = XCAR (tail);
|
|
|
2709 if (EQ (propelt, tem))
|
|
|
2710 return 1;
|
|
|
2711 if (CONSP (tem) && EQ (propelt, XCAR (tem)))
|
|
|
2712 return 1;
|
|
|
2713 }
|
|
|
2714 }
|
|
|
2715 return 0;
|
|
|
2716 }
|
|
|
2717
|
|
|
2718 /* Return 1 if PROPVAL appears as the car of an element of LIST
|
|
|
2719 and the cdr of that element is non-nil.
|
|
|
2720 If PROPVAL is a list, check each element of PROPVAL in that way,
|
|
|
2721 and the first time some element is found,
|
|
|
2722 return 1 if the cdr of that element is non-nil.
|
|
|
2723 Otherwise return 0.
|
|
|
2724 This function cannot quit. */
|
|
|
2725
|
|
|
2726 static int
|
|
|
2727 invisible_ellipsis_p (REGISTER Lisp_Object propval, Lisp_Object list)
|
|
|
2728 {
|
|
|
2729 REGISTER Lisp_Object tail, proptail;
|
|
|
2730 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
2731 {
|
|
|
2732 REGISTER Lisp_Object tem;
|
|
|
2733 tem = XCAR (tail);
|
|
|
2734 if (CONSP (tem) && EQ (propval, XCAR (tem)))
|
|
|
2735 return ! NILP (XCDR (tem));
|
|
|
2736 }
|
|
|
2737 if (CONSP (propval))
|
|
|
2738 for (proptail = propval; CONSP (proptail);
|
|
|
2739 proptail = XCDR (proptail))
|
|
|
2740 {
|
|
|
2741 Lisp_Object propelt;
|
|
|
2742 propelt = XCAR (proptail);
|
|
|
2743 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
2744 {
|
|
|
2745 REGISTER Lisp_Object tem;
|
|
|
2746 tem = XCAR (tail);
|
|
|
2747 if (CONSP (tem) && EQ (propelt, XCAR (tem)))
|
|
|
2748 return ! NILP (XCDR (tem));
|
|
|
2749 }
|
|
|
2750 }
|
|
|
2751 return 0;
|
|
|
2752 }
|
|
|
2753
|
|
|
2754 face_index
|
|
|
2755 extent_fragment_update (struct window *w, struct extent_fragment *ef,
|
|
665
|
2756 Bytebpos pos)
|
|
428
|
2757 {
|
|
|
2758 int i;
|
|
|
2759 Extent_List *sel =
|
|
|
2760 buffer_or_string_stack_of_extents_force (ef->object)->extents;
|
|
|
2761 EXTENT lhe = 0;
|
|
|
2762 struct extent dummy_lhe_extent;
|
|
665
|
2763 Membpos mempos = buffer_or_string_bytebpos_to_membpos (ef->object, pos);
|
|
428
|
2764
|
|
|
2765 #ifdef ERROR_CHECK_EXTENTS
|
|
|
2766 assert (pos >= buffer_or_string_accessible_begin_byte (ef->object)
|
|
|
2767 && pos <= buffer_or_string_accessible_end_byte (ef->object));
|
|
|
2768 #endif
|
|
|
2769
|
|
|
2770 Dynarr_reset (ef->extents);
|
|
|
2771 Dynarr_reset (ef->begin_glyphs);
|
|
|
2772 Dynarr_reset (ef->end_glyphs);
|
|
|
2773
|
|
|
2774 ef->previously_invisible = ef->invisible;
|
|
|
2775 if (ef->invisible)
|
|
|
2776 {
|
|
|
2777 if (ef->invisible_ellipses)
|
|
|
2778 ef->invisible_ellipses_already_displayed = 1;
|
|
|
2779 }
|
|
|
2780 else
|
|
|
2781 ef->invisible_ellipses_already_displayed = 0;
|
|
|
2782 ef->invisible = 0;
|
|
|
2783 ef->invisible_ellipses = 0;
|
|
|
2784
|
|
|
2785 /* Set up the begin and end positions. */
|
|
|
2786 ef->pos = pos;
|
|
|
2787 ef->end = extent_find_end_of_run (ef->object, pos, 0);
|
|
|
2788
|
|
|
2789 /* Note that extent_find_end_of_run() already moved the SOE for us. */
|
|
|
2790 /* soe_move (ef->object, mempos); */
|
|
|
2791
|
|
|
2792 /* Determine the begin glyphs at POS. */
|
|
|
2793 for (i = 0; i < extent_list_num_els (sel); i++)
|
|
|
2794 {
|
|
|
2795 EXTENT e = extent_list_at (sel, i, 0);
|
|
|
2796 if (extent_start (e) == mempos && !NILP (extent_begin_glyph (e)))
|
|
|
2797 {
|
|
|
2798 Lisp_Object glyph = extent_begin_glyph (e);
|
|
|
2799 struct glyph_block gb;
|
|
|
2800
|
|
|
2801 gb.glyph = glyph;
|
|
|
2802 XSETEXTENT (gb.extent, e);
|
|
|
2803 Dynarr_add (ef->begin_glyphs, gb);
|
|
|
2804 }
|
|
|
2805 }
|
|
|
2806
|
|
|
2807 /* Determine the end glyphs at POS. */
|
|
|
2808 for (i = 0; i < extent_list_num_els (sel); i++)
|
|
|
2809 {
|
|
|
2810 EXTENT e = extent_list_at (sel, i, 1);
|
|
|
2811 if (extent_end (e) == mempos && !NILP (extent_end_glyph (e)))
|
|
|
2812 {
|
|
|
2813 Lisp_Object glyph = extent_end_glyph (e);
|
|
|
2814 struct glyph_block gb;
|
|
|
2815
|
|
|
2816 gb.glyph = glyph;
|
|
|
2817 XSETEXTENT (gb.extent, e);
|
|
|
2818 Dynarr_add (ef->end_glyphs, gb);
|
|
|
2819 }
|
|
|
2820 }
|
|
|
2821
|
|
|
2822 /* We tried determining all the charsets used in the run here,
|
|
|
2823 but that fails even if we only do the current line -- display
|
|
|
2824 tables or non-printable characters might cause other charsets
|
|
|
2825 to be used. */
|
|
|
2826
|
|
|
2827 /* Determine whether the last-highlighted-extent is present. */
|
|
|
2828 if (EXTENTP (Vlast_highlighted_extent))
|
|
|
2829 lhe = XEXTENT (Vlast_highlighted_extent);
|
|
|
2830
|
|
|
2831 /* Now add all extents that overlap the character after POS and
|
|
|
2832 have a non-nil face. Also check if the character is invisible. */
|
|
|
2833 for (i = 0; i < extent_list_num_els (sel); i++)
|
|
|
2834 {
|
|
|
2835 EXTENT e = extent_list_at (sel, i, 0);
|
|
|
2836 if (extent_end (e) > mempos)
|
|
|
2837 {
|
|
|
2838 Lisp_Object invis_prop = extent_invisible (e);
|
|
|
2839
|
|
|
2840 if (!NILP (invis_prop))
|
|
|
2841 {
|
|
|
2842 if (!BUFFERP (ef->object))
|
|
|
2843 /* #### no `string-invisibility-spec' */
|
|
|
2844 ef->invisible = 1;
|
|
|
2845 else
|
|
|
2846 {
|
|
|
2847 if (!ef->invisible_ellipses_already_displayed &&
|
|
|
2848 EXTENT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS
|
|
|
2849 (XBUFFER (ef->object), invis_prop))
|
|
|
2850 {
|
|
|
2851 ef->invisible = 1;
|
|
|
2852 ef->invisible_ellipses = 1;
|
|
|
2853 }
|
|
|
2854 else if (EXTENT_PROP_MEANS_INVISIBLE
|
|
|
2855 (XBUFFER (ef->object), invis_prop))
|
|
|
2856 ef->invisible = 1;
|
|
|
2857 }
|
|
|
2858 }
|
|
|
2859
|
|
|
2860 /* Remember that one of the extents in the list might be our
|
|
|
2861 dummy extent representing the highlighting that is
|
|
|
2862 attached to some other extent that is currently
|
|
|
2863 mouse-highlighted. When an extent is mouse-highlighted,
|
|
|
2864 it is as if there are two extents there, of potentially
|
|
|
2865 different priorities: the extent being highlighted, with
|
|
|
2866 whatever face and priority it has; and an ephemeral
|
|
|
2867 extent in the `mouse-face' face with
|
|
|
2868 `mouse-highlight-priority'.
|
|
|
2869 */
|
|
|
2870
|
|
|
2871 if (!NILP (extent_face (e)))
|
|
|
2872 Dynarr_add (ef->extents, e);
|
|
|
2873 if (e == lhe)
|
|
|
2874 {
|
|
|
2875 Lisp_Object f;
|
|
|
2876 /* zeroing isn't really necessary; we only deref `priority'
|
|
|
2877 and `face' */
|
|
|
2878 xzero (dummy_lhe_extent);
|
|
|
2879 set_extent_priority (&dummy_lhe_extent,
|
|
|
2880 mouse_highlight_priority);
|
|
|
2881 /* Need to break up the following expression, due to an */
|
|
|
2882 /* error in the Digital UNIX 3.2g C compiler (Digital */
|
|
|
2883 /* UNIX Compiler Driver 3.11). */
|
|
|
2884 f = extent_mouse_face (lhe);
|
|
|
2885 extent_face (&dummy_lhe_extent) = f;
|
|
|
2886 Dynarr_add (ef->extents, &dummy_lhe_extent);
|
|
|
2887 }
|
|
|
2888 /* since we are looping anyway, we might as well do this here */
|
|
|
2889 if ((!NILP(extent_initial_redisplay_function (e))) &&
|
|
|
2890 !extent_in_red_event_p(e))
|
|
|
2891 {
|
|
|
2892 Lisp_Object function = extent_initial_redisplay_function (e);
|
|
|
2893 Lisp_Object obj;
|
|
|
2894
|
|
|
2895 /* printf ("initial redisplay function called!\n "); */
|
|
|
2896
|
|
|
2897 /* print_extent_2 (e);
|
|
|
2898 printf ("\n"); */
|
|
|
2899
|
|
|
2900 /* FIXME: One should probably inhibit the displaying of
|
|
|
2901 this extent to reduce flicker */
|
|
|
2902 extent_in_red_event_p(e) = 1;
|
|
|
2903
|
|
|
2904 /* call the function */
|
|
|
2905 XSETEXTENT(obj,e);
|
|
|
2906 if(!NILP(function))
|
|
|
2907 Fenqueue_eval_event(function,obj);
|
|
|
2908 }
|
|
|
2909 }
|
|
|
2910 }
|
|
|
2911
|
|
|
2912 extent_fragment_sort_by_priority (ef->extents);
|
|
|
2913
|
|
|
2914 /* Now merge the faces together into a single face. The code to
|
|
|
2915 do this is in faces.c because it involves manipulating faces. */
|
|
|
2916 return get_extent_fragment_face_cache_index (w, ef);
|
|
|
2917 }
|
|
|
2918
|
|
|
2919
|
|
|
2920 /************************************************************************/
|
|
|
2921 /* extent-object methods */
|
|
|
2922 /************************************************************************/
|
|
|
2923
|
|
|
2924 /* These are the basic helper functions for handling the allocation of
|
|
|
2925 extent objects. They are similar to the functions for other
|
|
|
2926 lrecord objects. allocate_extent() is in alloc.c, not here. */
|
|
|
2927
|
|
|
2928 static Lisp_Object
|
|
|
2929 mark_extent (Lisp_Object obj)
|
|
|
2930 {
|
|
|
2931 struct extent *extent = XEXTENT (obj);
|
|
|
2932
|
|
|
2933 mark_object (extent_object (extent));
|
|
|
2934 mark_object (extent_no_chase_normal_field (extent, face));
|
|
|
2935 return extent->plist;
|
|
|
2936 }
|
|
|
2937
|
|
|
2938 static void
|
|
|
2939 print_extent_1 (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
|
|
|
2940 {
|
|
|
2941 EXTENT ext = XEXTENT (obj);
|
|
|
2942 EXTENT anc = extent_ancestor (ext);
|
|
|
2943 Lisp_Object tail;
|
|
|
2944 char buf[64], *bp = buf;
|
|
|
2945
|
|
|
2946 /* Retrieve the ancestor and use it, for faster retrieval of properties */
|
|
|
2947
|
|
|
2948 if (!NILP (extent_begin_glyph (anc))) *bp++ = '*';
|
|
|
2949 *bp++ = (extent_start_open_p (anc) ? '(': '[');
|
|
|
2950 if (extent_detached_p (ext))
|
|
|
2951 strcpy (bp, "detached");
|
|
|
2952 else
|
|
|
2953 sprintf (bp, "%ld, %ld",
|
|
|
2954 (long) XINT (Fextent_start_position (obj)),
|
|
|
2955 (long) XINT (Fextent_end_position (obj)));
|
|
|
2956 bp += strlen (bp);
|
|
|
2957 *bp++ = (extent_end_open_p (anc) ? ')': ']');
|
|
|
2958 if (!NILP (extent_end_glyph (anc))) *bp++ = '*';
|
|
|
2959 *bp++ = ' ';
|
|
|
2960
|
|
|
2961 if (!NILP (extent_read_only (anc))) *bp++ = '%';
|
|
|
2962 if (!NILP (extent_mouse_face (anc))) *bp++ = 'H';
|
|
|
2963 if (extent_unique_p (anc)) *bp++ = 'U';
|
|
|
2964 else if (extent_duplicable_p (anc)) *bp++ = 'D';
|
|
|
2965 if (!NILP (extent_invisible (anc))) *bp++ = 'I';
|
|
|
2966
|
|
|
2967 if (!NILP (extent_read_only (anc)) || !NILP (extent_mouse_face (anc)) ||
|
|
|
2968 extent_unique_p (anc) ||
|
|
|
2969 extent_duplicable_p (anc) || !NILP (extent_invisible (anc)))
|
|
|
2970 *bp++ = ' ';
|
|
|
2971 *bp = '\0';
|
|
|
2972 write_c_string (buf, printcharfun);
|
|
|
2973
|
|
|
2974 tail = extent_plist_slot (anc);
|
|
|
2975
|
|
|
2976 for (; !NILP (tail); tail = Fcdr (Fcdr (tail)))
|
|
|
2977 {
|
|
|
2978 Lisp_Object v = XCAR (XCDR (tail));
|
|
|
2979 if (NILP (v)) continue;
|
|
|
2980 print_internal (XCAR (tail), printcharfun, escapeflag);
|
|
|
2981 write_c_string (" ", printcharfun);
|
|
|
2982 }
|
|
|
2983
|
|
|
2984 sprintf (buf, "0x%lx", (long) ext);
|
|
|
2985 write_c_string (buf, printcharfun);
|
|
|
2986 }
|
|
|
2987
|
|
|
2988 static void
|
|
|
2989 print_extent (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
|
|
|
2990 {
|
|
|
2991 if (escapeflag)
|
|
|
2992 {
|
|
442
|
2993 const char *title = "";
|
|
|
2994 const char *name = "";
|
|
|
2995 const char *posttitle = "";
|
|
428
|
2996 Lisp_Object obj2 = Qnil;
|
|
|
2997
|
|
|
2998 /* Destroyed extents have 't' in the object field, causing
|
|
|
2999 extent_object() to abort (maybe). */
|
|
|
3000 if (EXTENT_LIVE_P (XEXTENT (obj)))
|
|
|
3001 obj2 = extent_object (XEXTENT (obj));
|
|
|
3002
|
|
|
3003 if (NILP (obj2))
|
|
|
3004 title = "no buffer";
|
|
|
3005 else if (BUFFERP (obj2))
|
|
|
3006 {
|
|
|
3007 if (BUFFER_LIVE_P (XBUFFER (obj2)))
|
|
|
3008 {
|
|
|
3009 title = "buffer ";
|
|
|
3010 name = (char *) XSTRING_DATA (XBUFFER (obj2)->name);
|
|
|
3011 }
|
|
|
3012 else
|
|
|
3013 {
|
|
|
3014 title = "Killed Buffer";
|
|
|
3015 name = "";
|
|
|
3016 }
|
|
|
3017 }
|
|
|
3018 else
|
|
|
3019 {
|
|
|
3020 assert (STRINGP (obj2));
|
|
|
3021 title = "string \"";
|
|
|
3022 posttitle = "\"";
|
|
|
3023 name = (char *) XSTRING_DATA (obj2);
|
|
|
3024 }
|
|
|
3025
|
|
|
3026 if (print_readably)
|
|
|
3027 {
|
|
|
3028 if (!EXTENT_LIVE_P (XEXTENT (obj)))
|
|
563
|
3029 printing_unreadable_object ("#<destroyed extent>");
|
|
428
|
3030 else
|
|
563
|
3031 printing_unreadable_object ("#<extent 0x%lx>",
|
|
428
|
3032 (long) XEXTENT (obj));
|
|
|
3033 }
|
|
|
3034
|
|
|
3035 if (!EXTENT_LIVE_P (XEXTENT (obj)))
|
|
|
3036 write_c_string ("#<destroyed extent", printcharfun);
|
|
|
3037 else
|
|
|
3038 {
|
|
|
3039 char *buf = (char *)
|
|
|
3040 alloca (strlen (title) + strlen (name) + strlen (posttitle) + 1);
|
|
|
3041 write_c_string ("#<extent ", printcharfun);
|
|
|
3042 print_extent_1 (obj, printcharfun, escapeflag);
|
|
|
3043 write_c_string (extent_detached_p (XEXTENT (obj))
|
|
|
3044 ? " from " : " in ", printcharfun);
|
|
|
3045 sprintf (buf, "%s%s%s", title, name, posttitle);
|
|
|
3046 write_c_string (buf, printcharfun);
|
|
|
3047 }
|
|
|
3048 }
|
|
|
3049 else
|
|
|
3050 {
|
|
|
3051 if (print_readably)
|
|
563
|
3052 printing_unreadable_object ("#<extent>");
|
|
428
|
3053 write_c_string ("#<extent", printcharfun);
|
|
|
3054 }
|
|
|
3055 write_c_string (">", printcharfun);
|
|
|
3056 }
|
|
|
3057
|
|
|
3058 static int
|
|
|
3059 properties_equal (EXTENT e1, EXTENT e2, int depth)
|
|
|
3060 {
|
|
|
3061 /* When this function is called, all indirections have been followed.
|
|
|
3062 Thus, the indirection checks in the various macros below will not
|
|
|
3063 amount to anything, and could be removed. However, the time
|
|
|
3064 savings would probably not be significant. */
|
|
|
3065 if (!(EQ (extent_face (e1), extent_face (e2)) &&
|
|
|
3066 extent_priority (e1) == extent_priority (e2) &&
|
|
|
3067 internal_equal (extent_begin_glyph (e1), extent_begin_glyph (e2),
|
|
|
3068 depth + 1) &&
|
|
|
3069 internal_equal (extent_end_glyph (e1), extent_end_glyph (e2),
|
|
|
3070 depth + 1)))
|
|
|
3071 return 0;
|
|
|
3072
|
|
|
3073 /* compare the bit flags. */
|
|
|
3074 {
|
|
|
3075 /* The has_aux field should not be relevant. */
|
|
|
3076 int e1_has_aux = e1->flags.has_aux;
|
|
|
3077 int e2_has_aux = e2->flags.has_aux;
|
|
|
3078 int value;
|
|
|
3079
|
|
|
3080 e1->flags.has_aux = e2->flags.has_aux = 0;
|
|
|
3081 value = memcmp (&e1->flags, &e2->flags, sizeof (e1->flags));
|
|
|
3082 e1->flags.has_aux = e1_has_aux;
|
|
|
3083 e2->flags.has_aux = e2_has_aux;
|
|
|
3084 if (value)
|
|
|
3085 return 0;
|
|
|
3086 }
|
|
|
3087
|
|
|
3088 /* compare the random elements of the plists. */
|
|
|
3089 return !plists_differ (extent_no_chase_plist (e1),
|
|
|
3090 extent_no_chase_plist (e2),
|
|
|
3091 0, 0, depth + 1);
|
|
|
3092 }
|
|
|
3093
|
|
|
3094 static int
|
|
|
3095 extent_equal (Lisp_Object obj1, Lisp_Object obj2, int depth)
|
|
|
3096 {
|
|
|
3097 struct extent *e1 = XEXTENT (obj1);
|
|
|
3098 struct extent *e2 = XEXTENT (obj2);
|
|
|
3099 return
|
|
|
3100 (extent_start (e1) == extent_start (e2) &&
|
|
|
3101 extent_end (e1) == extent_end (e2) &&
|
|
|
3102 internal_equal (extent_object (e1), extent_object (e2), depth + 1) &&
|
|
|
3103 properties_equal (extent_ancestor (e1), extent_ancestor (e2),
|
|
|
3104 depth));
|
|
|
3105 }
|
|
|
3106
|
|
665
|
3107 static Hashcode
|
|
428
|
3108 extent_hash (Lisp_Object obj, int depth)
|
|
|
3109 {
|
|
|
3110 struct extent *e = XEXTENT (obj);
|
|
|
3111 /* No need to hash all of the elements; that would take too long.
|
|
|
3112 Just hash the most common ones. */
|
|
|
3113 return HASH3 (extent_start (e), extent_end (e),
|
|
|
3114 internal_hash (extent_object (e), depth + 1));
|
|
|
3115 }
|
|
|
3116
|
|
442
|
3117 static const struct lrecord_description extent_description[] = {
|
|
|
3118 { XD_LISP_OBJECT, offsetof (struct extent, object) },
|
|
|
3119 { XD_LISP_OBJECT, offsetof (struct extent, flags.face) },
|
|
|
3120 { XD_LISP_OBJECT, offsetof (struct extent, plist) },
|
|
|
3121 { XD_END }
|
|
|
3122 };
|
|
|
3123
|
|
428
|
3124 static Lisp_Object
|
|
|
3125 extent_getprop (Lisp_Object obj, Lisp_Object prop)
|
|
|
3126 {
|
|
|
3127 return Fextent_property (obj, prop, Qunbound);
|
|
|
3128 }
|
|
|
3129
|
|
|
3130 static int
|
|
|
3131 extent_putprop (Lisp_Object obj, Lisp_Object prop, Lisp_Object value)
|
|
|
3132 {
|
|
|
3133 Fset_extent_property (obj, prop, value);
|
|
|
3134 return 1;
|
|
|
3135 }
|
|
|
3136
|
|
|
3137 static int
|
|
|
3138 extent_remprop (Lisp_Object obj, Lisp_Object prop)
|
|
|
3139 {
|
|
|
3140 EXTENT ext = XEXTENT (obj);
|
|
|
3141
|
|
|
3142 /* This list is taken from Fset_extent_property, and should be kept
|
|
|
3143 in synch. */
|
|
|
3144 if (EQ (prop, Qread_only)
|
|
|
3145 || EQ (prop, Qunique)
|
|
|
3146 || EQ (prop, Qduplicable)
|
|
|
3147 || EQ (prop, Qinvisible)
|
|
|
3148 || EQ (prop, Qdetachable)
|
|
|
3149 || EQ (prop, Qdetached)
|
|
|
3150 || EQ (prop, Qdestroyed)
|
|
|
3151 || EQ (prop, Qpriority)
|
|
|
3152 || EQ (prop, Qface)
|
|
|
3153 || EQ (prop, Qinitial_redisplay_function)
|
|
|
3154 || EQ (prop, Qafter_change_functions)
|
|
|
3155 || EQ (prop, Qbefore_change_functions)
|
|
|
3156 || EQ (prop, Qmouse_face)
|
|
|
3157 || EQ (prop, Qhighlight)
|
|
|
3158 || EQ (prop, Qbegin_glyph_layout)
|
|
|
3159 || EQ (prop, Qend_glyph_layout)
|
|
|
3160 || EQ (prop, Qglyph_layout)
|
|
|
3161 || EQ (prop, Qbegin_glyph)
|
|
|
3162 || EQ (prop, Qend_glyph)
|
|
|
3163 || EQ (prop, Qstart_open)
|
|
|
3164 || EQ (prop, Qend_open)
|
|
|
3165 || EQ (prop, Qstart_closed)
|
|
|
3166 || EQ (prop, Qend_closed)
|
|
|
3167 || EQ (prop, Qkeymap))
|
|
|
3168 {
|
|
|
3169 /* #### Is this correct, anyway? */
|
|
|
3170 return -1;
|
|
|
3171 }
|
|
|
3172
|
|
|
3173 return external_remprop (extent_plist_addr (ext), prop, 0, ERROR_ME);
|
|
|
3174 }
|
|
|
3175
|
|
|
3176 static Lisp_Object
|
|
|
3177 extent_plist (Lisp_Object obj)
|
|
|
3178 {
|
|
|
3179 return Fextent_properties (obj);
|
|
|
3180 }
|
|
|
3181
|
|
442
|
3182 DEFINE_BASIC_LRECORD_IMPLEMENTATION_WITH_PROPS ("extent", extent,
|
|
|
3183 mark_extent,
|
|
|
3184 print_extent,
|
|
|
3185 /* NOTE: If you declare a
|
|
|
3186 finalization method here,
|
|
|
3187 it will NOT be called.
|
|
|
3188 Shaft city. */
|
|
|
3189 0,
|
|
|
3190 extent_equal, extent_hash,
|
|
|
3191 extent_description,
|
|
|
3192 extent_getprop, extent_putprop,
|
|
|
3193 extent_remprop, extent_plist,
|
|
|
3194 struct extent);
|
|
|
3195
|
|
428
|
3196
|
|
|
3197 /************************************************************************/
|
|
|
3198 /* basic extent accessors */
|
|
|
3199 /************************************************************************/
|
|
|
3200
|
|
|
3201 /* These functions are for checking externally-passed extent objects
|
|
|
3202 and returning an extent's basic properties, which include the
|
|
|
3203 buffer the extent is associated with, the endpoints of the extent's
|
|
|
3204 range, the open/closed-ness of those endpoints, and whether the
|
|
|
3205 extent is detached. Manipulating these properties requires
|
|
|
3206 manipulating the ordered lists that hold extents; thus, functions
|
|
|
3207 to do that are in a later section. */
|
|
|
3208
|
|
|
3209 /* Given a Lisp_Object that is supposed to be an extent, make sure it
|
|
|
3210 is OK and return an extent pointer. Extents can be in one of four
|
|
|
3211 states:
|
|
|
3212
|
|
|
3213 1) destroyed
|
|
|
3214 2) detached and not associated with a buffer
|
|
|
3215 3) detached and associated with a buffer
|
|
|
3216 4) attached to a buffer
|
|
|
3217
|
|
|
3218 If FLAGS is 0, types 2-4 are allowed. If FLAGS is DE_MUST_HAVE_BUFFER,
|
|
|
3219 types 3-4 are allowed. If FLAGS is DE_MUST_BE_ATTACHED, only type 4
|
|
|
3220 is allowed.
|
|
|
3221 */
|
|
|
3222
|
|
|
3223 static EXTENT
|
|
|
3224 decode_extent (Lisp_Object extent_obj, unsigned int flags)
|
|
|
3225 {
|
|
|
3226 EXTENT extent;
|
|
|
3227 Lisp_Object obj;
|
|
|
3228
|
|
|
3229 CHECK_LIVE_EXTENT (extent_obj);
|
|
|
3230 extent = XEXTENT (extent_obj);
|
|
|
3231 obj = extent_object (extent);
|
|
|
3232
|
|
|
3233 /* the following condition will fail if we're dealing with a freed extent */
|
|
|
3234 assert (NILP (obj) || BUFFERP (obj) || STRINGP (obj));
|
|
|
3235
|
|
|
3236 if (flags & DE_MUST_BE_ATTACHED)
|
|
|
3237 flags |= DE_MUST_HAVE_BUFFER;
|
|
|
3238
|
|
|
3239 /* if buffer is dead, then convert extent to have no buffer. */
|
|
|
3240 if (BUFFERP (obj) && !BUFFER_LIVE_P (XBUFFER (obj)))
|
|
|
3241 obj = extent_object (extent) = Qnil;
|
|
|
3242
|
|
|
3243 assert (!NILP (obj) || extent_detached_p (extent));
|
|
|
3244
|
|
|
3245 if ((NILP (obj) && (flags & DE_MUST_HAVE_BUFFER))
|
|
|
3246 || (extent_detached_p (extent) && (flags & DE_MUST_BE_ATTACHED)))
|
|
|
3247 {
|
|
442
|
3248 invalid_argument ("extent doesn't belong to a buffer or string",
|
|
|
3249 extent_obj);
|
|
428
|
3250 }
|
|
|
3251
|
|
|
3252 return extent;
|
|
|
3253 }
|
|
|
3254
|
|
|
3255 /* Note that the returned value is a buffer position, not a byte index. */
|
|
|
3256
|
|
|
3257 static Lisp_Object
|
|
|
3258 extent_endpoint_external (Lisp_Object extent_obj, int endp)
|
|
|
3259 {
|
|
|
3260 EXTENT extent = decode_extent (extent_obj, 0);
|
|
|
3261
|
|
|
3262 if (extent_detached_p (extent))
|
|
|
3263 return Qnil;
|
|
|
3264 else
|
|
665
|
3265 return make_int (extent_endpoint_charbpos (extent, endp));
|
|
428
|
3266 }
|
|
|
3267
|
|
|
3268 DEFUN ("extentp", Fextentp, 1, 1, 0, /*
|
|
|
3269 Return t if OBJECT is an extent.
|
|
|
3270 */
|
|
|
3271 (object))
|
|
|
3272 {
|
|
|
3273 return EXTENTP (object) ? Qt : Qnil;
|
|
|
3274 }
|
|
|
3275
|
|
|
3276 DEFUN ("extent-live-p", Fextent_live_p, 1, 1, 0, /*
|
|
|
3277 Return t if OBJECT is an extent that has not been destroyed.
|
|
|
3278 */
|
|
|
3279 (object))
|
|
|
3280 {
|
|
|
3281 return EXTENTP (object) && EXTENT_LIVE_P (XEXTENT (object)) ? Qt : Qnil;
|
|
|
3282 }
|
|
|
3283
|
|
|
3284 DEFUN ("extent-detached-p", Fextent_detached_p, 1, 1, 0, /*
|
|
|
3285 Return t if EXTENT is detached.
|
|
|
3286 */
|
|
|
3287 (extent))
|
|
|
3288 {
|
|
|
3289 return extent_detached_p (decode_extent (extent, 0)) ? Qt : Qnil;
|
|
|
3290 }
|
|
|
3291
|
|
|
3292 DEFUN ("extent-object", Fextent_object, 1, 1, 0, /*
|
|
|
3293 Return object (buffer or string) that EXTENT refers to.
|
|
|
3294 */
|
|
|
3295 (extent))
|
|
|
3296 {
|
|
|
3297 return extent_object (decode_extent (extent, 0));
|
|
|
3298 }
|
|
|
3299
|
|
|
3300 DEFUN ("extent-start-position", Fextent_start_position, 1, 1, 0, /*
|
|
|
3301 Return start position of EXTENT, or nil if EXTENT is detached.
|
|
|
3302 */
|
|
|
3303 (extent))
|
|
|
3304 {
|
|
|
3305 return extent_endpoint_external (extent, 0);
|
|
|
3306 }
|
|
|
3307
|
|
|
3308 DEFUN ("extent-end-position", Fextent_end_position, 1, 1, 0, /*
|
|
|
3309 Return end position of EXTENT, or nil if EXTENT is detached.
|
|
|
3310 */
|
|
|
3311 (extent))
|
|
|
3312 {
|
|
|
3313 return extent_endpoint_external (extent, 1);
|
|
|
3314 }
|
|
|
3315
|
|
|
3316 DEFUN ("extent-length", Fextent_length, 1, 1, 0, /*
|
|
|
3317 Return length of EXTENT in characters.
|
|
|
3318 */
|
|
|
3319 (extent))
|
|
|
3320 {
|
|
|
3321 EXTENT e = decode_extent (extent, DE_MUST_BE_ATTACHED);
|
|
665
|
3322 return make_int (extent_endpoint_charbpos (e, 1)
|
|
|
3323 - extent_endpoint_charbpos (e, 0));
|
|
428
|
3324 }
|
|
|
3325
|
|
|
3326 DEFUN ("next-extent", Fnext_extent, 1, 1, 0, /*
|
|
|
3327 Find next extent after EXTENT.
|
|
|
3328 If EXTENT is a buffer return the first extent in the buffer; likewise
|
|
|
3329 for strings.
|
|
|
3330 Extents in a buffer are ordered in what is called the "display"
|
|
|
3331 order, which sorts by increasing start positions and then by *decreasing*
|
|
|
3332 end positions.
|
|
|
3333 If you want to perform an operation on a series of extents, use
|
|
|
3334 `map-extents' instead of this function; it is much more efficient.
|
|
|
3335 The primary use of this function should be to enumerate all the
|
|
|
3336 extents in a buffer.
|
|
|
3337 Note: The display order is not necessarily the order that `map-extents'
|
|
|
3338 processes extents in!
|
|
|
3339 */
|
|
|
3340 (extent))
|
|
|
3341 {
|
|
|
3342 Lisp_Object val;
|
|
|
3343 EXTENT next;
|
|
|
3344
|
|
|
3345 if (EXTENTP (extent))
|
|
|
3346 next = extent_next (decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
|
3347 else
|
|
|
3348 next = extent_first (decode_buffer_or_string (extent));
|
|
|
3349
|
|
|
3350 if (!next)
|
|
|
3351 return Qnil;
|
|
|
3352 XSETEXTENT (val, next);
|
|
|
3353 return val;
|
|
|
3354 }
|
|
|
3355
|
|
|
3356 DEFUN ("previous-extent", Fprevious_extent, 1, 1, 0, /*
|
|
|
3357 Find last extent before EXTENT.
|
|
|
3358 If EXTENT is a buffer return the last extent in the buffer; likewise
|
|
|
3359 for strings.
|
|
|
3360 This function is analogous to `next-extent'.
|
|
|
3361 */
|
|
|
3362 (extent))
|
|
|
3363 {
|
|
|
3364 Lisp_Object val;
|
|
|
3365 EXTENT prev;
|
|
|
3366
|
|
|
3367 if (EXTENTP (extent))
|
|
|
3368 prev = extent_previous (decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
|
3369 else
|
|
|
3370 prev = extent_last (decode_buffer_or_string (extent));
|
|
|
3371
|
|
|
3372 if (!prev)
|
|
|
3373 return Qnil;
|
|
|
3374 XSETEXTENT (val, prev);
|
|
|
3375 return val;
|
|
|
3376 }
|
|
|
3377
|
|
|
3378 #ifdef DEBUG_XEMACS
|
|
|
3379
|
|
|
3380 DEFUN ("next-e-extent", Fnext_e_extent, 1, 1, 0, /*
|
|
|
3381 Find next extent after EXTENT using the "e" order.
|
|
|
3382 If EXTENT is a buffer return the first extent in the buffer; likewise
|
|
|
3383 for strings.
|
|
|
3384 */
|
|
|
3385 (extent))
|
|
|
3386 {
|
|
|
3387 Lisp_Object val;
|
|
|
3388 EXTENT next;
|
|
|
3389
|
|
|
3390 if (EXTENTP (extent))
|
|
|
3391 next = extent_e_next (decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
|
3392 else
|
|
|
3393 next = extent_e_first (decode_buffer_or_string (extent));
|
|
|
3394
|
|
|
3395 if (!next)
|
|
|
3396 return Qnil;
|
|
|
3397 XSETEXTENT (val, next);
|
|
|
3398 return val;
|
|
|
3399 }
|
|
|
3400
|
|
|
3401 DEFUN ("previous-e-extent", Fprevious_e_extent, 1, 1, 0, /*
|
|
|
3402 Find last extent before EXTENT using the "e" order.
|
|
|
3403 If EXTENT is a buffer return the last extent in the buffer; likewise
|
|
|
3404 for strings.
|
|
|
3405 This function is analogous to `next-e-extent'.
|
|
|
3406 */
|
|
|
3407 (extent))
|
|
|
3408 {
|
|
|
3409 Lisp_Object val;
|
|
|
3410 EXTENT prev;
|
|
|
3411
|
|
|
3412 if (EXTENTP (extent))
|
|
|
3413 prev = extent_e_previous (decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
|
3414 else
|
|
|
3415 prev = extent_e_last (decode_buffer_or_string (extent));
|
|
|
3416
|
|
|
3417 if (!prev)
|
|
|
3418 return Qnil;
|
|
|
3419 XSETEXTENT (val, prev);
|
|
|
3420 return val;
|
|
|
3421 }
|
|
|
3422
|
|
|
3423 #endif
|
|
|
3424
|
|
|
3425 DEFUN ("next-extent-change", Fnext_extent_change, 1, 2, 0, /*
|
|
|
3426 Return the next position after POS where an extent begins or ends.
|
|
|
3427 If POS is at the end of the buffer or string, POS will be returned;
|
|
|
3428 otherwise a position greater than POS will always be returned.
|
|
444
|
3429 If OBJECT is nil, the current buffer is assumed.
|
|
428
|
3430 */
|
|
|
3431 (pos, object))
|
|
|
3432 {
|
|
|
3433 Lisp_Object obj = decode_buffer_or_string (object);
|
|
665
|
3434 Bytebpos bpos;
|
|
428
|
3435
|
|
|
3436 bpos = get_buffer_or_string_pos_byte (obj, pos, GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
3437 bpos = extent_find_end_of_run (obj, bpos, 1);
|
|
665
|
3438 return make_int (buffer_or_string_bytebpos_to_charbpos (obj, bpos));
|
|
428
|
3439 }
|
|
|
3440
|
|
|
3441 DEFUN ("previous-extent-change", Fprevious_extent_change, 1, 2, 0, /*
|
|
|
3442 Return the last position before POS where an extent begins or ends.
|
|
|
3443 If POS is at the beginning of the buffer or string, POS will be returned;
|
|
|
3444 otherwise a position less than POS will always be returned.
|
|
|
3445 If OBJECT is nil, the current buffer is assumed.
|
|
|
3446 */
|
|
|
3447 (pos, object))
|
|
|
3448 {
|
|
|
3449 Lisp_Object obj = decode_buffer_or_string (object);
|
|
665
|
3450 Bytebpos bpos;
|
|
428
|
3451
|
|
|
3452 bpos = get_buffer_or_string_pos_byte (obj, pos, GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
3453 bpos = extent_find_beginning_of_run (obj, bpos, 1);
|
|
665
|
3454 return make_int (buffer_or_string_bytebpos_to_charbpos (obj, bpos));
|
|
428
|
3455 }
|
|
|
3456
|
|
|
3457
|
|
|
3458 /************************************************************************/
|
|
|
3459 /* parent and children stuff */
|
|
|
3460 /************************************************************************/
|
|
|
3461
|
|
|
3462 DEFUN ("extent-parent", Fextent_parent, 1, 1, 0, /*
|
|
|
3463 Return the parent (if any) of EXTENT.
|
|
|
3464 If an extent has a parent, it derives all its properties from that extent
|
|
|
3465 and has no properties of its own. (The only "properties" that the
|
|
|
3466 extent keeps are the buffer/string it refers to and the start and end
|
|
|
3467 points.) It is possible for an extent's parent to itself have a parent.
|
|
|
3468 */
|
|
|
3469 (extent))
|
|
|
3470 /* do I win the prize for the strangest split infinitive? */
|
|
|
3471 {
|
|
|
3472 EXTENT e = decode_extent (extent, 0);
|
|
|
3473 return extent_parent (e);
|
|
|
3474 }
|
|
|
3475
|
|
|
3476 DEFUN ("extent-children", Fextent_children, 1, 1, 0, /*
|
|
|
3477 Return a list of the children (if any) of EXTENT.
|
|
|
3478 The children of an extent are all those extents whose parent is that extent.
|
|
|
3479 This function does not recursively trace children of children.
|
|
|
3480 \(To do that, use `extent-descendants'.)
|
|
|
3481 */
|
|
|
3482 (extent))
|
|
|
3483 {
|
|
|
3484 EXTENT e = decode_extent (extent, 0);
|
|
|
3485 Lisp_Object children = extent_children (e);
|
|
|
3486
|
|
|
3487 if (!NILP (children))
|
|
|
3488 return Fcopy_sequence (XWEAK_LIST_LIST (children));
|
|
|
3489 else
|
|
|
3490 return Qnil;
|
|
|
3491 }
|
|
|
3492
|
|
|
3493 static void
|
|
|
3494 remove_extent_from_children_list (EXTENT e, Lisp_Object child)
|
|
|
3495 {
|
|
|
3496 Lisp_Object children = extent_children (e);
|
|
|
3497
|
|
|
3498 #ifdef ERROR_CHECK_EXTENTS
|
|
|
3499 assert (!NILP (memq_no_quit (child, XWEAK_LIST_LIST (children))));
|
|
|
3500 #endif
|
|
|
3501 XWEAK_LIST_LIST (children) =
|
|
|
3502 delq_no_quit (child, XWEAK_LIST_LIST (children));
|
|
|
3503 }
|
|
|
3504
|
|
|
3505 static void
|
|
|
3506 add_extent_to_children_list (EXTENT e, Lisp_Object child)
|
|
|
3507 {
|
|
|
3508 Lisp_Object children = extent_children (e);
|
|
|
3509
|
|
|
3510 if (NILP (children))
|
|
|
3511 {
|
|
|
3512 children = make_weak_list (WEAK_LIST_SIMPLE);
|
|
|
3513 set_extent_no_chase_aux_field (e, children, children);
|
|
|
3514 }
|
|
|
3515
|
|
|
3516 #ifdef ERROR_CHECK_EXTENTS
|
|
|
3517 assert (NILP (memq_no_quit (child, XWEAK_LIST_LIST (children))));
|
|
|
3518 #endif
|
|
|
3519 XWEAK_LIST_LIST (children) = Fcons (child, XWEAK_LIST_LIST (children));
|
|
|
3520 }
|
|
|
3521
|
|
|
3522 DEFUN ("set-extent-parent", Fset_extent_parent, 2, 2, 0, /*
|
|
|
3523 Set the parent of EXTENT to PARENT (may be nil).
|
|
|
3524 See `extent-parent'.
|
|
|
3525 */
|
|
|
3526 (extent, parent))
|
|
|
3527 {
|
|
|
3528 EXTENT e = decode_extent (extent, 0);
|
|
|
3529 Lisp_Object cur_parent = extent_parent (e);
|
|
|
3530 Lisp_Object rest;
|
|
|
3531
|
|
|
3532 XSETEXTENT (extent, e);
|
|
|
3533 if (!NILP (parent))
|
|
|
3534 CHECK_LIVE_EXTENT (parent);
|
|
|
3535 if (EQ (parent, cur_parent))
|
|
|
3536 return Qnil;
|
|
|
3537 for (rest = parent; !NILP (rest); rest = extent_parent (XEXTENT (rest)))
|
|
|
3538 if (EQ (rest, extent))
|
|
563
|
3539 signal_error (Qinvalid_change,
|
|
442
|
3540 "Circular parent chain would result",
|
|
|
3541 extent);
|
|
428
|
3542 if (NILP (parent))
|
|
|
3543 {
|
|
|
3544 remove_extent_from_children_list (XEXTENT (cur_parent), extent);
|
|
|
3545 set_extent_no_chase_aux_field (e, parent, Qnil);
|
|
|
3546 e->flags.has_parent = 0;
|
|
|
3547 }
|
|
|
3548 else
|
|
|
3549 {
|
|
|
3550 add_extent_to_children_list (XEXTENT (parent), extent);
|
|
|
3551 set_extent_no_chase_aux_field (e, parent, parent);
|
|
|
3552 e->flags.has_parent = 1;
|
|
|
3553 }
|
|
|
3554 /* changing the parent also changes the properties of all children. */
|
|
|
3555 {
|
|
|
3556 int old_invis = (!NILP (cur_parent) &&
|
|
|
3557 !NILP (extent_invisible (XEXTENT (cur_parent))));
|
|
|
3558 int new_invis = (!NILP (parent) &&
|
|
|
3559 !NILP (extent_invisible (XEXTENT (parent))));
|
|
|
3560
|
|
|
3561 extent_maybe_changed_for_redisplay (e, 1, new_invis != old_invis);
|
|
|
3562 }
|
|
|
3563
|
|
|
3564 return Qnil;
|
|
|
3565 }
|
|
|
3566
|
|
|
3567
|
|
|
3568 /************************************************************************/
|
|
|
3569 /* basic extent mutators */
|
|
|
3570 /************************************************************************/
|
|
|
3571
|
|
|
3572 /* Note: If you track non-duplicable extents by undo, you'll get bogus
|
|
|
3573 undo records for transient extents via update-extent.
|
|
|
3574 For example, query-replace will do this.
|
|
|
3575 */
|
|
|
3576
|
|
|
3577 static void
|
|
665
|
3578 set_extent_endpoints_1 (EXTENT extent, Membpos start, Membpos end)
|
|
428
|
3579 {
|
|
|
3580 #ifdef ERROR_CHECK_EXTENTS
|
|
|
3581 Lisp_Object obj = extent_object (extent);
|
|
|
3582
|
|
|
3583 assert (start <= end);
|
|
|
3584 if (BUFFERP (obj))
|
|
|
3585 {
|
|
665
|
3586 assert (valid_membpos_p (XBUFFER (obj), start));
|
|
|
3587 assert (valid_membpos_p (XBUFFER (obj), end));
|
|
428
|
3588 }
|
|
|
3589 #endif
|
|
|
3590
|
|
|
3591 /* Optimization: if the extent is already where we want it to be,
|
|
|
3592 do nothing. */
|
|
|
3593 if (!extent_detached_p (extent) && extent_start (extent) == start &&
|
|
|
3594 extent_end (extent) == end)
|
|
|
3595 return;
|
|
|
3596
|
|
|
3597 if (extent_detached_p (extent))
|
|
|
3598 {
|
|
|
3599 if (extent_duplicable_p (extent))
|
|
|
3600 {
|
|
|
3601 Lisp_Object extent_obj;
|
|
|
3602 XSETEXTENT (extent_obj, extent);
|
|
|
3603 record_extent (extent_obj, 1);
|
|
|
3604 }
|
|
|
3605 }
|
|
|
3606 else
|
|
|
3607 extent_detach (extent);
|
|
|
3608
|
|
|
3609 set_extent_start (extent, start);
|
|
|
3610 set_extent_end (extent, end);
|
|
|
3611 extent_attach (extent);
|
|
|
3612 }
|
|
|
3613
|
|
|
3614 /* Set extent's endpoints to S and E, and put extent in buffer or string
|
|
|
3615 OBJECT. (If OBJECT is nil, do not change the extent's object.) */
|
|
|
3616
|
|
|
3617 void
|
|
665
|
3618 set_extent_endpoints (EXTENT extent, Bytebpos s, Bytebpos e, Lisp_Object object)
|
|
|
3619 {
|
|
|
3620 Membpos start, end;
|
|
428
|
3621
|
|
|
3622 if (NILP (object))
|
|
|
3623 {
|
|
|
3624 object = extent_object (extent);
|
|
|
3625 assert (!NILP (object));
|
|
|
3626 }
|
|
|
3627 else if (!EQ (object, extent_object (extent)))
|
|
|
3628 {
|
|
|
3629 extent_detach (extent);
|
|
|
3630 extent_object (extent) = object;
|
|
|
3631 }
|
|
|
3632
|
|
|
3633 start = s < 0 ? extent_start (extent) :
|
|
665
|
3634 buffer_or_string_bytebpos_to_membpos (object, s);
|
|
428
|
3635 end = e < 0 ? extent_end (extent) :
|
|
665
|
3636 buffer_or_string_bytebpos_to_membpos (object, e);
|
|
428
|
3637 set_extent_endpoints_1 (extent, start, end);
|
|
|
3638 }
|
|
|
3639
|
|
|
3640 static void
|
|
|
3641 set_extent_openness (EXTENT extent, int start_open, int end_open)
|
|
|
3642 {
|
|
|
3643 if (start_open != -1)
|
|
|
3644 extent_start_open_p (extent) = start_open;
|
|
|
3645 if (end_open != -1)
|
|
|
3646 extent_end_open_p (extent) = end_open;
|
|
|
3647 /* changing the open/closedness of an extent does not affect
|
|
|
3648 redisplay. */
|
|
|
3649 }
|
|
|
3650
|
|
|
3651 static EXTENT
|
|
665
|
3652 make_extent_internal (Lisp_Object object, Bytebpos from, Bytebpos to)
|
|
428
|
3653 {
|
|
|
3654 EXTENT extent;
|
|
|
3655
|
|
|
3656 extent = make_extent_detached (object);
|
|
|
3657 set_extent_endpoints (extent, from, to, Qnil);
|
|
|
3658 return extent;
|
|
|
3659 }
|
|
|
3660
|
|
|
3661 static EXTENT
|
|
665
|
3662 copy_extent (EXTENT original, Bytebpos from, Bytebpos to, Lisp_Object object)
|
|
428
|
3663 {
|
|
|
3664 EXTENT e;
|
|
|
3665
|
|
|
3666 e = make_extent_detached (object);
|
|
|
3667 if (from >= 0)
|
|
|
3668 set_extent_endpoints (e, from, to, Qnil);
|
|
|
3669
|
|
|
3670 e->plist = Fcopy_sequence (original->plist);
|
|
|
3671 memcpy (&e->flags, &original->flags, sizeof (e->flags));
|
|
|
3672 if (e->flags.has_aux)
|
|
|
3673 {
|
|
|
3674 /* also need to copy the aux struct. It won't work for
|
|
|
3675 this extent to share the same aux struct as the original
|
|
|
3676 one. */
|
|
|
3677 struct extent_auxiliary *data =
|
|
|
3678 alloc_lcrecord_type (struct extent_auxiliary,
|
|
|
3679 &lrecord_extent_auxiliary);
|
|
|
3680
|
|
|
3681 copy_lcrecord (data, XEXTENT_AUXILIARY (XCAR (original->plist)));
|
|
|
3682 XSETEXTENT_AUXILIARY (XCAR (e->plist), data);
|
|
|
3683 }
|
|
|
3684
|
|
|
3685 {
|
|
|
3686 /* we may have just added another child to the parent extent. */
|
|
|
3687 Lisp_Object parent = extent_parent (e);
|
|
|
3688 if (!NILP (parent))
|
|
|
3689 {
|
|
|
3690 Lisp_Object extent;
|
|
|
3691 XSETEXTENT (extent, e);
|
|
|
3692 add_extent_to_children_list (XEXTENT (parent), extent);
|
|
|
3693 }
|
|
|
3694 }
|
|
|
3695
|
|
|
3696 return e;
|
|
|
3697 }
|
|
|
3698
|
|
|
3699 static void
|
|
|
3700 destroy_extent (EXTENT extent)
|
|
|
3701 {
|
|
|
3702 Lisp_Object rest, nextrest, children;
|
|
|
3703 Lisp_Object extent_obj;
|
|
|
3704
|
|
|
3705 if (!extent_detached_p (extent))
|
|
|
3706 extent_detach (extent);
|
|
|
3707 /* disassociate the extent from its children and parent */
|
|
|
3708 children = extent_children (extent);
|
|
|
3709 if (!NILP (children))
|
|
|
3710 {
|
|
|
3711 LIST_LOOP_DELETING (rest, nextrest, XWEAK_LIST_LIST (children))
|
|
|
3712 Fset_extent_parent (XCAR (rest), Qnil);
|
|
|
3713 }
|
|
|
3714 XSETEXTENT (extent_obj, extent);
|
|
|
3715 Fset_extent_parent (extent_obj, Qnil);
|
|
|
3716 /* mark the extent as destroyed */
|
|
|
3717 extent_object (extent) = Qt;
|
|
|
3718 }
|
|
|
3719
|
|
|
3720 DEFUN ("make-extent", Fmake_extent, 2, 3, 0, /*
|
|
|
3721 Make an extent for the range [FROM, TO) in BUFFER-OR-STRING.
|
|
|
3722 BUFFER-OR-STRING defaults to the current buffer. Insertions at point
|
|
|
3723 TO will be outside of the extent; insertions at FROM will be inside the
|
|
|
3724 extent, causing the extent to grow. (This is the same way that markers
|
|
|
3725 behave.) You can change the behavior of insertions at the endpoints
|
|
|
3726 using `set-extent-property'. The extent is initially detached if both
|
|
|
3727 FROM and TO are nil, and in this case BUFFER-OR-STRING defaults to nil,
|
|
|
3728 meaning the extent is in no buffer and no string.
|
|
|
3729 */
|
|
|
3730 (from, to, buffer_or_string))
|
|
|
3731 {
|
|
|
3732 Lisp_Object extent_obj;
|
|
|
3733 Lisp_Object obj;
|
|
|
3734
|
|
|
3735 obj = decode_buffer_or_string (buffer_or_string);
|
|
|
3736 if (NILP (from) && NILP (to))
|
|
|
3737 {
|
|
|
3738 if (NILP (buffer_or_string))
|
|
|
3739 obj = Qnil;
|
|
|
3740 XSETEXTENT (extent_obj, make_extent_detached (obj));
|
|
|
3741 }
|
|
|
3742 else
|
|
|
3743 {
|
|
665
|
3744 Bytebpos start, end;
|
|
428
|
3745
|
|
|
3746 get_buffer_or_string_range_byte (obj, from, to, &start, &end,
|
|
|
3747 GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
3748 XSETEXTENT (extent_obj, make_extent_internal (obj, start, end));
|
|
|
3749 }
|
|
|
3750 return extent_obj;
|
|
|
3751 }
|
|
|
3752
|
|
|
3753 DEFUN ("copy-extent", Fcopy_extent, 1, 2, 0, /*
|
|
|
3754 Make a copy of EXTENT. It is initially detached.
|
|
|
3755 Optional argument BUFFER-OR-STRING defaults to EXTENT's buffer or string.
|
|
|
3756 */
|
|
|
3757 (extent, buffer_or_string))
|
|
|
3758 {
|
|
|
3759 EXTENT ext = decode_extent (extent, 0);
|
|
|
3760
|
|
|
3761 if (NILP (buffer_or_string))
|
|
|
3762 buffer_or_string = extent_object (ext);
|
|
|
3763 else
|
|
|
3764 buffer_or_string = decode_buffer_or_string (buffer_or_string);
|
|
|
3765
|
|
|
3766 XSETEXTENT (extent, copy_extent (ext, -1, -1, buffer_or_string));
|
|
|
3767 return extent;
|
|
|
3768 }
|
|
|
3769
|
|
|
3770 DEFUN ("delete-extent", Fdelete_extent, 1, 1, 0, /*
|
|
|
3771 Remove EXTENT from its buffer and destroy it.
|
|
|
3772 This does not modify the buffer's text, only its display properties.
|
|
|
3773 The extent cannot be used thereafter.
|
|
|
3774 */
|
|
|
3775 (extent))
|
|
|
3776 {
|
|
|
3777 EXTENT ext;
|
|
|
3778
|
|
|
3779 /* We do not call decode_extent() here because already-destroyed
|
|
|
3780 extents are OK. */
|
|
|
3781 CHECK_EXTENT (extent);
|
|
|
3782 ext = XEXTENT (extent);
|
|
|
3783
|
|
|
3784 if (!EXTENT_LIVE_P (ext))
|
|
|
3785 return Qnil;
|
|
|
3786 destroy_extent (ext);
|
|
|
3787 return Qnil;
|
|
|
3788 }
|
|
|
3789
|
|
|
3790 DEFUN ("detach-extent", Fdetach_extent, 1, 1, 0, /*
|
|
|
3791 Remove EXTENT from its buffer in such a way that it can be re-inserted.
|
|
|
3792 An extent is also detached when all of its characters are all killed by a
|
|
|
3793 deletion, unless its `detachable' property has been unset.
|
|
|
3794
|
|
|
3795 Extents which have the `duplicable' attribute are tracked by the undo
|
|
|
3796 mechanism. Detachment via `detach-extent' and string deletion is recorded,
|
|
|
3797 as is attachment via `insert-extent' and string insertion. Extent motion,
|
|
|
3798 face changes, and attachment via `make-extent' and `set-extent-endpoints'
|
|
|
3799 are not recorded. This means that extent changes which are to be undo-able
|
|
|
3800 must be performed by character editing, or by insertion and detachment of
|
|
|
3801 duplicable extents.
|
|
|
3802 */
|
|
|
3803 (extent))
|
|
|
3804 {
|
|
|
3805 EXTENT ext = decode_extent (extent, 0);
|
|
|
3806
|
|
|
3807 if (extent_detached_p (ext))
|
|
|
3808 return extent;
|
|
|
3809 if (extent_duplicable_p (ext))
|
|
|
3810 record_extent (extent, 0);
|
|
|
3811 extent_detach (ext);
|
|
|
3812
|
|
|
3813 return extent;
|
|
|
3814 }
|
|
|
3815
|
|
|
3816 DEFUN ("set-extent-endpoints", Fset_extent_endpoints, 3, 4, 0, /*
|
|
|
3817 Set the endpoints of EXTENT to START, END.
|
|
|
3818 If START and END are null, call detach-extent on EXTENT.
|
|
|
3819 BUFFER-OR-STRING specifies the new buffer or string that the extent should
|
|
|
3820 be in, and defaults to EXTENT's buffer or string. (If nil, and EXTENT
|
|
|
3821 is in no buffer and no string, it defaults to the current buffer.)
|
|
|
3822 See documentation on `detach-extent' for a discussion of undo recording.
|
|
|
3823 */
|
|
|
3824 (extent, start, end, buffer_or_string))
|
|
|
3825 {
|
|
|
3826 EXTENT ext;
|
|
665
|
3827 Bytebpos s, e;
|
|
428
|
3828
|
|
|
3829 ext = decode_extent (extent, 0);
|
|
|
3830
|
|
|
3831 if (NILP (buffer_or_string))
|
|
|
3832 {
|
|
|
3833 buffer_or_string = extent_object (ext);
|
|
|
3834 if (NILP (buffer_or_string))
|
|
|
3835 buffer_or_string = Fcurrent_buffer ();
|
|
|
3836 }
|
|
|
3837 else
|
|
|
3838 buffer_or_string = decode_buffer_or_string (buffer_or_string);
|
|
|
3839
|
|
|
3840 if (NILP (start) && NILP (end))
|
|
|
3841 return Fdetach_extent (extent);
|
|
|
3842
|
|
|
3843 get_buffer_or_string_range_byte (buffer_or_string, start, end, &s, &e,
|
|
|
3844 GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
3845
|
|
468
|
3846 buffer_or_string_extent_info_force (buffer_or_string);
|
|
428
|
3847 set_extent_endpoints (ext, s, e, buffer_or_string);
|
|
|
3848 return extent;
|
|
|
3849 }
|
|
|
3850
|
|
|
3851
|
|
|
3852 /************************************************************************/
|
|
|
3853 /* mapping over extents */
|
|
|
3854 /************************************************************************/
|
|
|
3855
|
|
|
3856 static unsigned int
|
|
|
3857 decode_map_extents_flags (Lisp_Object flags)
|
|
|
3858 {
|
|
|
3859 unsigned int retval = 0;
|
|
|
3860 unsigned int all_extents_specified = 0;
|
|
|
3861 unsigned int in_region_specified = 0;
|
|
|
3862
|
|
|
3863 if (EQ (flags, Qt)) /* obsoleteness compatibility */
|
|
|
3864 return ME_END_CLOSED;
|
|
|
3865 if (NILP (flags))
|
|
|
3866 return 0;
|
|
|
3867 if (SYMBOLP (flags))
|
|
|
3868 flags = Fcons (flags, Qnil);
|
|
|
3869 while (!NILP (flags))
|
|
|
3870 {
|
|
|
3871 Lisp_Object sym;
|
|
|
3872 CHECK_CONS (flags);
|
|
|
3873 sym = XCAR (flags);
|
|
|
3874 CHECK_SYMBOL (sym);
|
|
|
3875 if (EQ (sym, Qall_extents_closed) || EQ (sym, Qall_extents_open) ||
|
|
|
3876 EQ (sym, Qall_extents_closed_open) ||
|
|
|
3877 EQ (sym, Qall_extents_open_closed))
|
|
|
3878 {
|
|
|
3879 if (all_extents_specified)
|
|
563
|
3880 invalid_argument ("Only one `all-extents-*' flag may be specified", Qunbound);
|
|
428
|
3881 all_extents_specified = 1;
|
|
|
3882 }
|
|
|
3883 if (EQ (sym, Qstart_in_region) || EQ (sym, Qend_in_region) ||
|
|
|
3884 EQ (sym, Qstart_and_end_in_region) ||
|
|
|
3885 EQ (sym, Qstart_or_end_in_region))
|
|
|
3886 {
|
|
|
3887 if (in_region_specified)
|
|
563
|
3888 invalid_argument ("Only one `*-in-region' flag may be specified", Qunbound);
|
|
428
|
3889 in_region_specified = 1;
|
|
|
3890 }
|
|
|
3891
|
|
|
3892 /* I do so love that conditional operator ... */
|
|
|
3893 retval |=
|
|
|
3894 EQ (sym, Qend_closed) ? ME_END_CLOSED :
|
|
|
3895 EQ (sym, Qstart_open) ? ME_START_OPEN :
|
|
|
3896 EQ (sym, Qall_extents_closed) ? ME_ALL_EXTENTS_CLOSED :
|
|
|
3897 EQ (sym, Qall_extents_open) ? ME_ALL_EXTENTS_OPEN :
|
|
|
3898 EQ (sym, Qall_extents_closed_open) ? ME_ALL_EXTENTS_CLOSED_OPEN :
|
|
|
3899 EQ (sym, Qall_extents_open_closed) ? ME_ALL_EXTENTS_OPEN_CLOSED :
|
|
|
3900 EQ (sym, Qstart_in_region) ? ME_START_IN_REGION :
|
|
|
3901 EQ (sym, Qend_in_region) ? ME_END_IN_REGION :
|
|
|
3902 EQ (sym, Qstart_and_end_in_region) ? ME_START_AND_END_IN_REGION :
|
|
|
3903 EQ (sym, Qstart_or_end_in_region) ? ME_START_OR_END_IN_REGION :
|
|
|
3904 EQ (sym, Qnegate_in_region) ? ME_NEGATE_IN_REGION :
|
|
563
|
3905 (invalid_constant ("Invalid `map-extents' flag", sym), 0);
|
|
428
|
3906
|
|
|
3907 flags = XCDR (flags);
|
|
|
3908 }
|
|
|
3909 return retval;
|
|
|
3910 }
|
|
|
3911
|
|
|
3912 DEFUN ("extent-in-region-p", Fextent_in_region_p, 1, 4, 0, /*
|
|
|
3913 Return whether EXTENT overlaps a specified region.
|
|
|
3914 This is equivalent to whether `map-extents' would visit EXTENT when called
|
|
|
3915 with these args.
|
|
|
3916 */
|
|
|
3917 (extent, from, to, flags))
|
|
|
3918 {
|
|
665
|
3919 Bytebpos start, end;
|
|
428
|
3920 EXTENT ext = decode_extent (extent, DE_MUST_BE_ATTACHED);
|
|
|
3921 Lisp_Object obj = extent_object (ext);
|
|
|
3922
|
|
|
3923 get_buffer_or_string_range_byte (obj, from, to, &start, &end, GB_ALLOW_NIL |
|
|
|
3924 GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
3925
|
|
|
3926 return extent_in_region_p (ext, start, end, decode_map_extents_flags (flags)) ?
|
|
|
3927 Qt : Qnil;
|
|
|
3928 }
|
|
|
3929
|
|
|
3930 struct slow_map_extents_arg
|
|
|
3931 {
|
|
|
3932 Lisp_Object map_arg;
|
|
|
3933 Lisp_Object map_routine;
|
|
|
3934 Lisp_Object result;
|
|
|
3935 Lisp_Object property;
|
|
|
3936 Lisp_Object value;
|
|
|
3937 };
|
|
|
3938
|
|
|
3939 static int
|
|
|
3940 slow_map_extents_function (EXTENT extent, void *arg)
|
|
|
3941 {
|
|
|
3942 /* This function can GC */
|
|
|
3943 struct slow_map_extents_arg *closure = (struct slow_map_extents_arg *) arg;
|
|
|
3944 Lisp_Object extent_obj;
|
|
|
3945
|
|
|
3946 XSETEXTENT (extent_obj, extent);
|
|
|
3947
|
|
|
3948 /* make sure this extent qualifies according to the PROPERTY
|
|
|
3949 and VALUE args */
|
|
|
3950
|
|
|
3951 if (!NILP (closure->property))
|
|
|
3952 {
|
|
|
3953 Lisp_Object value = Fextent_property (extent_obj, closure->property,
|
|
|
3954 Qnil);
|
|
|
3955 if ((NILP (closure->value) && NILP (value)) ||
|
|
|
3956 (!NILP (closure->value) && !EQ (value, closure->value)))
|
|
|
3957 return 0;
|
|
|
3958 }
|
|
|
3959
|
|
|
3960 closure->result = call2 (closure->map_routine, extent_obj,
|
|
|
3961 closure->map_arg);
|
|
|
3962 return !NILP (closure->result);
|
|
|
3963 }
|
|
|
3964
|
|
|
3965 DEFUN ("map-extents", Fmap_extents, 1, 8, 0, /*
|
|
|
3966 Map FUNCTION over the extents which overlap a region in OBJECT.
|
|
|
3967 OBJECT is normally a buffer or string but could be an extent (see below).
|
|
|
3968 The region is normally bounded by [FROM, TO) (i.e. the beginning of the
|
|
|
3969 region is closed and the end of the region is open), but this can be
|
|
|
3970 changed with the FLAGS argument (see below for a complete discussion).
|
|
|
3971
|
|
|
3972 FUNCTION is called with the arguments (extent, MAPARG). The arguments
|
|
|
3973 OBJECT, FROM, TO, MAPARG, and FLAGS are all optional and default to
|
|
|
3974 the current buffer, the beginning of OBJECT, the end of OBJECT, nil,
|
|
|
3975 and nil, respectively. `map-extents' returns the first non-nil result
|
|
|
3976 produced by FUNCTION, and no more calls to FUNCTION are made after it
|
|
|
3977 returns non-nil.
|
|
|
3978
|
|
|
3979 If OBJECT is an extent, FROM and TO default to the extent's endpoints,
|
|
|
3980 and the mapping omits that extent and its predecessors. This feature
|
|
|
3981 supports restarting a loop based on `map-extents'. Note: OBJECT must
|
|
|
3982 be attached to a buffer or string, and the mapping is done over that
|
|
|
3983 buffer or string.
|
|
|
3984
|
|
|
3985 An extent overlaps the region if there is any point in the extent that is
|
|
|
3986 also in the region. (For the purpose of overlap, zero-length extents and
|
|
|
3987 regions are treated as closed on both ends regardless of their endpoints'
|
|
|
3988 specified open/closedness.) Note that the endpoints of an extent or region
|
|
|
3989 are considered to be in that extent or region if and only if the
|
|
|
3990 corresponding end is closed. For example, the extent [5,7] overlaps the
|
|
|
3991 region [2,5] because 5 is in both the extent and the region. However, (5,7]
|
|
|
3992 does not overlap [2,5] because 5 is not in the extent, and neither [5,7] nor
|
|
|
3993 \(5,7] overlaps the region [2,5) because 5 is not in the region.
|
|
|
3994
|
|
|
3995 The optional FLAGS can be a symbol or a list of one or more symbols,
|
|
|
3996 modifying the behavior of `map-extents'. Allowed symbols are:
|
|
|
3997
|
|
|
3998 end-closed The region's end is closed.
|
|
|
3999
|
|
|
4000 start-open The region's start is open.
|
|
|
4001
|
|
|
4002 all-extents-closed Treat all extents as closed on both ends for the
|
|
|
4003 purpose of determining whether they overlap the
|
|
|
4004 region, irrespective of their actual open- or
|
|
|
4005 closedness.
|
|
|
4006 all-extents-open Treat all extents as open on both ends.
|
|
|
4007 all-extents-closed-open Treat all extents as start-closed, end-open.
|
|
|
4008 all-extents-open-closed Treat all extents as start-open, end-closed.
|
|
|
4009
|
|
|
4010 start-in-region In addition to the above conditions for extent
|
|
|
4011 overlap, the extent's start position must lie within
|
|
|
4012 the specified region. Note that, for this
|
|
|
4013 condition, open start positions are treated as if
|
|
|
4014 0.5 was added to the endpoint's value, and open
|
|
|
4015 end positions are treated as if 0.5 was subtracted
|
|
|
4016 from the endpoint's value.
|
|
|
4017 end-in-region The extent's end position must lie within the
|
|
|
4018 region.
|
|
|
4019 start-and-end-in-region Both the extent's start and end positions must lie
|
|
|
4020 within the region.
|
|
|
4021 start-or-end-in-region Either the extent's start or end position must lie
|
|
|
4022 within the region.
|
|
|
4023
|
|
|
4024 negate-in-region The condition specified by a `*-in-region' flag
|
|
|
4025 must NOT hold for the extent to be considered.
|
|
|
4026
|
|
|
4027
|
|
|
4028 At most one of `all-extents-closed', `all-extents-open',
|
|
|
4029 `all-extents-closed-open', and `all-extents-open-closed' may be specified.
|
|
|
4030
|
|
|
4031 At most one of `start-in-region', `end-in-region',
|
|
|
4032 `start-and-end-in-region', and `start-or-end-in-region' may be specified.
|
|
|
4033
|
|
|
4034 If optional arg PROPERTY is non-nil, only extents with that property set
|
|
|
4035 on them will be visited. If optional arg VALUE is non-nil, only extents
|
|
|
4036 whose value for that property is `eq' to VALUE will be visited.
|
|
|
4037 */
|
|
|
4038 (function, object, from, to, maparg, flags, property, value))
|
|
|
4039 {
|
|
|
4040 /* This function can GC */
|
|
|
4041 struct slow_map_extents_arg closure;
|
|
|
4042 unsigned int me_flags;
|
|
665
|
4043 Bytebpos start, end;
|
|
428
|
4044 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4045 EXTENT after = 0;
|
|
|
4046
|
|
|
4047 if (EXTENTP (object))
|
|
|
4048 {
|
|
|
4049 after = decode_extent (object, DE_MUST_BE_ATTACHED);
|
|
|
4050 if (NILP (from))
|
|
|
4051 from = Fextent_start_position (object);
|
|
|
4052 if (NILP (to))
|
|
|
4053 to = Fextent_end_position (object);
|
|
|
4054 object = extent_object (after);
|
|
|
4055 }
|
|
|
4056 else
|
|
|
4057 object = decode_buffer_or_string (object);
|
|
|
4058
|
|
|
4059 get_buffer_or_string_range_byte (object, from, to, &start, &end,
|
|
|
4060 GB_ALLOW_NIL | GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
4061
|
|
|
4062 me_flags = decode_map_extents_flags (flags);
|
|
|
4063
|
|
|
4064 if (!NILP (property))
|
|
|
4065 {
|
|
|
4066 if (!NILP (value))
|
|
|
4067 value = canonicalize_extent_property (property, value);
|
|
|
4068 }
|
|
|
4069
|
|
|
4070 GCPRO5 (function, maparg, object, property, value);
|
|
|
4071
|
|
|
4072 closure.map_arg = maparg;
|
|
|
4073 closure.map_routine = function;
|
|
|
4074 closure.result = Qnil;
|
|
|
4075 closure.property = property;
|
|
|
4076 closure.value = value;
|
|
|
4077
|
|
665
|
4078 map_extents_bytebpos (start, end, slow_map_extents_function,
|
|
428
|
4079 (void *) &closure, object, after,
|
|
|
4080 /* You never know what the user might do ... */
|
|
|
4081 me_flags | ME_MIGHT_CALL_ELISP);
|
|
|
4082
|
|
|
4083 UNGCPRO;
|
|
|
4084 return closure.result;
|
|
|
4085 }
|
|
|
4086
|
|
|
4087
|
|
|
4088 /************************************************************************/
|
|
|
4089 /* mapping over extents -- other functions */
|
|
|
4090 /************************************************************************/
|
|
|
4091
|
|
|
4092 /* ------------------------------- */
|
|
|
4093 /* map-extent-children */
|
|
|
4094 /* ------------------------------- */
|
|
|
4095
|
|
|
4096 struct slow_map_extent_children_arg
|
|
|
4097 {
|
|
|
4098 Lisp_Object map_arg;
|
|
|
4099 Lisp_Object map_routine;
|
|
|
4100 Lisp_Object result;
|
|
|
4101 Lisp_Object property;
|
|
|
4102 Lisp_Object value;
|
|
665
|
4103 Bytebpos start_min;
|
|
|
4104 Bytebpos prev_start;
|
|
|
4105 Bytebpos prev_end;
|
|
428
|
4106 };
|
|
|
4107
|
|
|
4108 static int
|
|
|
4109 slow_map_extent_children_function (EXTENT extent, void *arg)
|
|
|
4110 {
|
|
|
4111 /* This function can GC */
|
|
|
4112 struct slow_map_extent_children_arg *closure =
|
|
|
4113 (struct slow_map_extent_children_arg *) arg;
|
|
|
4114 Lisp_Object extent_obj;
|
|
665
|
4115 Bytebpos start = extent_endpoint_bytebpos (extent, 0);
|
|
|
4116 Bytebpos end = extent_endpoint_bytebpos (extent, 1);
|
|
428
|
4117 /* Make sure the extent starts inside the region of interest,
|
|
|
4118 rather than just overlaps it.
|
|
|
4119 */
|
|
|
4120 if (start < closure->start_min)
|
|
|
4121 return 0;
|
|
|
4122 /* Make sure the extent is not a child of a previous visited one.
|
|
|
4123 We know already, because of extent ordering,
|
|
|
4124 that start >= prev_start, and that if
|
|
|
4125 start == prev_start, then end <= prev_end.
|
|
|
4126 */
|
|
|
4127 if (start == closure->prev_start)
|
|
|
4128 {
|
|
|
4129 if (end < closure->prev_end)
|
|
|
4130 return 0;
|
|
|
4131 }
|
|
|
4132 else /* start > prev_start */
|
|
|
4133 {
|
|
|
4134 if (start < closure->prev_end)
|
|
|
4135 return 0;
|
|
|
4136 /* corner case: prev_end can be -1 if there is no prev */
|
|
|
4137 }
|
|
|
4138 XSETEXTENT (extent_obj, extent);
|
|
|
4139
|
|
|
4140 /* make sure this extent qualifies according to the PROPERTY
|
|
|
4141 and VALUE args */
|
|
|
4142
|
|
|
4143 if (!NILP (closure->property))
|
|
|
4144 {
|
|
|
4145 Lisp_Object value = Fextent_property (extent_obj, closure->property,
|
|
|
4146 Qnil);
|
|
|
4147 if ((NILP (closure->value) && NILP (value)) ||
|
|
|
4148 (!NILP (closure->value) && !EQ (value, closure->value)))
|
|
|
4149 return 0;
|
|
|
4150 }
|
|
|
4151
|
|
|
4152 closure->result = call2 (closure->map_routine, extent_obj,
|
|
|
4153 closure->map_arg);
|
|
|
4154
|
|
|
4155 /* Since the callback may change the buffer, compute all stored
|
|
|
4156 buffer positions here.
|
|
|
4157 */
|
|
|
4158 closure->start_min = -1; /* no need for this any more */
|
|
665
|
4159 closure->prev_start = extent_endpoint_bytebpos (extent, 0);
|
|
|
4160 closure->prev_end = extent_endpoint_bytebpos (extent, 1);
|
|
428
|
4161
|
|
|
4162 return !NILP (closure->result);
|
|
|
4163 }
|
|
|
4164
|
|
|
4165 DEFUN ("map-extent-children", Fmap_extent_children, 1, 8, 0, /*
|
|
|
4166 Map FUNCTION over the extents in the region from FROM to TO.
|
|
|
4167 FUNCTION is called with arguments (extent, MAPARG). See `map-extents'
|
|
|
4168 for a full discussion of the arguments FROM, TO, and FLAGS.
|
|
|
4169
|
|
|
4170 The arguments are the same as for `map-extents', but this function differs
|
|
|
4171 in that it only visits extents which start in the given region, and also
|
|
|
4172 in that, after visiting an extent E, it skips all other extents which start
|
|
|
4173 inside E but end before E's end.
|
|
|
4174
|
|
|
4175 Thus, this function may be used to walk a tree of extents in a buffer:
|
|
|
4176 (defun walk-extents (buffer &optional ignore)
|
|
|
4177 (map-extent-children 'walk-extents buffer))
|
|
|
4178 */
|
|
|
4179 (function, object, from, to, maparg, flags, property, value))
|
|
|
4180 {
|
|
|
4181 /* This function can GC */
|
|
|
4182 struct slow_map_extent_children_arg closure;
|
|
|
4183 unsigned int me_flags;
|
|
665
|
4184 Bytebpos start, end;
|
|
428
|
4185 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4186 EXTENT after = 0;
|
|
|
4187
|
|
|
4188 if (EXTENTP (object))
|
|
|
4189 {
|
|
|
4190 after = decode_extent (object, DE_MUST_BE_ATTACHED);
|
|
|
4191 if (NILP (from))
|
|
|
4192 from = Fextent_start_position (object);
|
|
|
4193 if (NILP (to))
|
|
|
4194 to = Fextent_end_position (object);
|
|
|
4195 object = extent_object (after);
|
|
|
4196 }
|
|
|
4197 else
|
|
|
4198 object = decode_buffer_or_string (object);
|
|
|
4199
|
|
|
4200 get_buffer_or_string_range_byte (object, from, to, &start, &end,
|
|
|
4201 GB_ALLOW_NIL | GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
4202
|
|
|
4203 me_flags = decode_map_extents_flags (flags);
|
|
|
4204
|
|
|
4205 if (!NILP (property))
|
|
|
4206 {
|
|
|
4207 if (!NILP (value))
|
|
|
4208 value = canonicalize_extent_property (property, value);
|
|
|
4209 }
|
|
|
4210
|
|
|
4211 GCPRO5 (function, maparg, object, property, value);
|
|
|
4212
|
|
|
4213 closure.map_arg = maparg;
|
|
|
4214 closure.map_routine = function;
|
|
|
4215 closure.result = Qnil;
|
|
|
4216 closure.property = property;
|
|
|
4217 closure.value = value;
|
|
|
4218 closure.start_min = start;
|
|
|
4219 closure.prev_start = -1;
|
|
|
4220 closure.prev_end = -1;
|
|
665
|
4221 map_extents_bytebpos (start, end, slow_map_extent_children_function,
|
|
428
|
4222 (void *) &closure, object, after,
|
|
|
4223 /* You never know what the user might do ... */
|
|
|
4224 me_flags | ME_MIGHT_CALL_ELISP);
|
|
|
4225
|
|
|
4226 UNGCPRO;
|
|
|
4227 return closure.result;
|
|
|
4228 }
|
|
|
4229
|
|
|
4230 /* ------------------------------- */
|
|
|
4231 /* extent-at */
|
|
|
4232 /* ------------------------------- */
|
|
|
4233
|
|
|
4234 /* find "smallest" matching extent containing pos -- (flag == 0) means
|
|
|
4235 all extents match, else (EXTENT_FLAGS (extent) & flag) must be true;
|
|
|
4236 for more than one matching extent with precisely the same endpoints,
|
|
|
4237 we choose the last extent in the extents_list.
|
|
|
4238 The search stops just before "before", if that is non-null.
|
|
|
4239 */
|
|
|
4240
|
|
|
4241 struct extent_at_arg
|
|
|
4242 {
|
|
442
|
4243 Lisp_Object best_match; /* or list of extents */
|
|
665
|
4244 Membpos best_start;
|
|
|
4245 Membpos best_end;
|
|
428
|
4246 Lisp_Object prop;
|
|
|
4247 EXTENT before;
|
|
442
|
4248 int all_extents;
|
|
428
|
4249 };
|
|
|
4250
|
|
|
4251 enum extent_at_flag
|
|
|
4252 {
|
|
|
4253 EXTENT_AT_AFTER,
|
|
|
4254 EXTENT_AT_BEFORE,
|
|
|
4255 EXTENT_AT_AT
|
|
|
4256 };
|
|
|
4257
|
|
|
4258 static enum extent_at_flag
|
|
|
4259 decode_extent_at_flag (Lisp_Object at_flag)
|
|
|
4260 {
|
|
|
4261 if (NILP (at_flag))
|
|
|
4262 return EXTENT_AT_AFTER;
|
|
|
4263
|
|
|
4264 CHECK_SYMBOL (at_flag);
|
|
|
4265 if (EQ (at_flag, Qafter)) return EXTENT_AT_AFTER;
|
|
|
4266 if (EQ (at_flag, Qbefore)) return EXTENT_AT_BEFORE;
|
|
|
4267 if (EQ (at_flag, Qat)) return EXTENT_AT_AT;
|
|
|
4268
|
|
563
|
4269 invalid_constant ("Invalid AT-FLAG in `extent-at'", at_flag);
|
|
428
|
4270 return EXTENT_AT_AFTER; /* unreached */
|
|
|
4271 }
|
|
|
4272
|
|
|
4273 static int
|
|
|
4274 extent_at_mapper (EXTENT e, void *arg)
|
|
|
4275 {
|
|
|
4276 struct extent_at_arg *closure = (struct extent_at_arg *) arg;
|
|
|
4277
|
|
|
4278 if (e == closure->before)
|
|
|
4279 return 1;
|
|
|
4280
|
|
|
4281 /* If closure->prop is non-nil, then the extent is only acceptable
|
|
|
4282 if it has a non-nil value for that property. */
|
|
|
4283 if (!NILP (closure->prop))
|
|
|
4284 {
|
|
|
4285 Lisp_Object extent;
|
|
|
4286 XSETEXTENT (extent, e);
|
|
|
4287 if (NILP (Fextent_property (extent, closure->prop, Qnil)))
|
|
|
4288 return 0;
|
|
|
4289 }
|
|
|
4290
|
|
442
|
4291 if (!closure->all_extents)
|
|
428
|
4292 {
|
|
442
|
4293 EXTENT current;
|
|
|
4294
|
|
|
4295 if (NILP (closure->best_match))
|
|
428
|
4296 goto accept;
|
|
442
|
4297 current = XEXTENT (closure->best_match);
|
|
428
|
4298 /* redundant but quick test */
|
|
442
|
4299 if (extent_start (current) > extent_start (e))
|
|
428
|
4300 return 0;
|
|
|
4301
|
|
|
4302 /* we return the "last" best fit, instead of the first --
|
|
|
4303 this is because then the glyph closest to two equivalent
|
|
|
4304 extents corresponds to the "extent-at" the text just past
|
|
|
4305 that same glyph */
|
|
|
4306 else if (!EXTENT_LESS_VALS (e, closure->best_start,
|
|
|
4307 closure->best_end))
|
|
|
4308 goto accept;
|
|
|
4309 else
|
|
|
4310 return 0;
|
|
|
4311 accept:
|
|
442
|
4312 XSETEXTENT (closure->best_match, e);
|
|
428
|
4313 closure->best_start = extent_start (e);
|
|
|
4314 closure->best_end = extent_end (e);
|
|
|
4315 }
|
|
442
|
4316 else
|
|
|
4317 {
|
|
|
4318 Lisp_Object extent;
|
|
|
4319
|
|
|
4320 XSETEXTENT (extent, e);
|
|
|
4321 closure->best_match = Fcons (extent, closure->best_match);
|
|
|
4322 }
|
|
428
|
4323
|
|
|
4324 return 0;
|
|
|
4325 }
|
|
|
4326
|
|
|
4327 static Lisp_Object
|
|
665
|
4328 extent_at_bytebpos (Bytebpos position, Lisp_Object object, Lisp_Object property,
|
|
442
|
4329 EXTENT before, enum extent_at_flag at_flag, int all_extents)
|
|
428
|
4330 {
|
|
|
4331 struct extent_at_arg closure;
|
|
442
|
4332 struct gcpro gcpro1;
|
|
428
|
4333
|
|
|
4334 /* it might be argued that invalid positions should cause
|
|
|
4335 errors, but the principle of least surprise dictates that
|
|
|
4336 nil should be returned (extent-at is often used in
|
|
|
4337 response to a mouse event, and in many cases previous events
|
|
|
4338 have changed the buffer contents).
|
|
|
4339
|
|
|
4340 Also, the openness stuff in the text-property code currently
|
|
|
4341 does not check its limits and might go off the end. */
|
|
|
4342 if ((at_flag == EXTENT_AT_BEFORE
|
|
|
4343 ? position <= buffer_or_string_absolute_begin_byte (object)
|
|
|
4344 : position < buffer_or_string_absolute_begin_byte (object))
|
|
|
4345 || (at_flag == EXTENT_AT_AFTER
|
|
|
4346 ? position >= buffer_or_string_absolute_end_byte (object)
|
|
|
4347 : position > buffer_or_string_absolute_end_byte (object)))
|
|
|
4348 return Qnil;
|
|
|
4349
|
|
442
|
4350 closure.best_match = Qnil;
|
|
428
|
4351 closure.prop = property;
|
|
|
4352 closure.before = before;
|
|
442
|
4353 closure.all_extents = all_extents;
|
|
|
4354
|
|
|
4355 GCPRO1 (closure.best_match);
|
|
665
|
4356 map_extents_bytebpos (at_flag == EXTENT_AT_BEFORE ? position - 1 : position,
|
|
428
|
4357 at_flag == EXTENT_AT_AFTER ? position + 1 : position,
|
|
|
4358 extent_at_mapper, (void *) &closure, object, 0,
|
|
|
4359 ME_START_OPEN | ME_ALL_EXTENTS_CLOSED);
|
|
442
|
4360 if (all_extents)
|
|
|
4361 closure.best_match = Fnreverse (closure.best_match);
|
|
|
4362 UNGCPRO;
|
|
|
4363
|
|
|
4364 return closure.best_match;
|
|
428
|
4365 }
|
|
|
4366
|
|
|
4367 DEFUN ("extent-at", Fextent_at, 1, 5, 0, /*
|
|
|
4368 Find "smallest" extent at POS in OBJECT having PROPERTY set.
|
|
|
4369 Normally, an extent is "at" POS if it overlaps the region (POS, POS+1);
|
|
|
4370 i.e. if it covers the character after POS. (However, see the definition
|
|
|
4371 of AT-FLAG.) "Smallest" means the extent that comes last in the display
|
|
|
4372 order; this normally means the extent whose start position is closest to
|
|
|
4373 POS. See `next-extent' for more information.
|
|
|
4374 OBJECT specifies a buffer or string and defaults to the current buffer.
|
|
|
4375 PROPERTY defaults to nil, meaning that any extent will do.
|
|
|
4376 Properties are attached to extents with `set-extent-property', which see.
|
|
|
4377 Returns nil if POS is invalid or there is no matching extent at POS.
|
|
|
4378 If the fourth argument BEFORE is not nil, it must be an extent; any returned
|
|
|
4379 extent will precede that extent. This feature allows `extent-at' to be
|
|
|
4380 used by a loop over extents.
|
|
|
4381 AT-FLAG controls how end cases are handled, and should be one of:
|
|
|
4382
|
|
|
4383 nil or `after' An extent is at POS if it covers the character
|
|
|
4384 after POS. This is consistent with the way
|
|
|
4385 that text properties work.
|
|
|
4386 `before' An extent is at POS if it covers the character
|
|
|
4387 before POS.
|
|
|
4388 `at' An extent is at POS if it overlaps or abuts POS.
|
|
|
4389 This includes all zero-length extents at POS.
|
|
|
4390
|
|
|
4391 Note that in all cases, the start-openness and end-openness of the extents
|
|
|
4392 considered is ignored. If you want to pay attention to those properties,
|
|
|
4393 you should use `map-extents', which gives you more control.
|
|
|
4394 */
|
|
|
4395 (pos, object, property, before, at_flag))
|
|
|
4396 {
|
|
665
|
4397 Bytebpos position;
|
|
428
|
4398 EXTENT before_extent;
|
|
|
4399 enum extent_at_flag fl;
|
|
|
4400
|
|
|
4401 object = decode_buffer_or_string (object);
|
|
|
4402 position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD);
|
|
|
4403 if (NILP (before))
|
|
|
4404 before_extent = 0;
|
|
|
4405 else
|
|
|
4406 before_extent = decode_extent (before, DE_MUST_BE_ATTACHED);
|
|
|
4407 if (before_extent && !EQ (object, extent_object (before_extent)))
|
|
442
|
4408 invalid_argument ("extent not in specified buffer or string", object);
|
|
428
|
4409 fl = decode_extent_at_flag (at_flag);
|
|
|
4410
|
|
665
|
4411 return extent_at_bytebpos (position, object, property, before_extent, fl, 0);
|
|
442
|
4412 }
|
|
|
4413
|
|
|
4414 DEFUN ("extents-at", Fextents_at, 1, 5, 0, /*
|
|
|
4415 Find all extents at POS in OBJECT having PROPERTY set.
|
|
|
4416 Normally, an extent is "at" POS if it overlaps the region (POS, POS+1);
|
|
|
4417 i.e. if it covers the character after POS. (However, see the definition
|
|
|
4418 of AT-FLAG.)
|
|
|
4419 This provides similar functionality to `extent-list', but does so in a way
|
|
|
4420 that is compatible with `extent-at'. (For example, errors due to POS out of
|
|
|
4421 range are ignored; this makes it safer to use this function in response to
|
|
|
4422 a mouse event, because in many cases previous events have changed the buffer
|
|
|
4423 contents.)
|
|
|
4424 OBJECT specifies a buffer or string and defaults to the current buffer.
|
|
|
4425 PROPERTY defaults to nil, meaning that any extent will do.
|
|
|
4426 Properties are attached to extents with `set-extent-property', which see.
|
|
|
4427 Returns nil if POS is invalid or there is no matching extent at POS.
|
|
|
4428 If the fourth argument BEFORE is not nil, it must be an extent; any returned
|
|
|
4429 extent will precede that extent. This feature allows `extents-at' to be
|
|
|
4430 used by a loop over extents.
|
|
|
4431 AT-FLAG controls how end cases are handled, and should be one of:
|
|
|
4432
|
|
|
4433 nil or `after' An extent is at POS if it covers the character
|
|
|
4434 after POS. This is consistent with the way
|
|
|
4435 that text properties work.
|
|
|
4436 `before' An extent is at POS if it covers the character
|
|
|
4437 before POS.
|
|
|
4438 `at' An extent is at POS if it overlaps or abuts POS.
|
|
|
4439 This includes all zero-length extents at POS.
|
|
|
4440
|
|
|
4441 Note that in all cases, the start-openness and end-openness of the extents
|
|
|
4442 considered is ignored. If you want to pay attention to those properties,
|
|
|
4443 you should use `map-extents', which gives you more control.
|
|
|
4444 */
|
|
|
4445 (pos, object, property, before, at_flag))
|
|
|
4446 {
|
|
665
|
4447 Bytebpos position;
|
|
442
|
4448 EXTENT before_extent;
|
|
|
4449 enum extent_at_flag fl;
|
|
|
4450
|
|
|
4451 object = decode_buffer_or_string (object);
|
|
|
4452 position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD);
|
|
|
4453 if (NILP (before))
|
|
|
4454 before_extent = 0;
|
|
|
4455 else
|
|
|
4456 before_extent = decode_extent (before, DE_MUST_BE_ATTACHED);
|
|
|
4457 if (before_extent && !EQ (object, extent_object (before_extent)))
|
|
|
4458 invalid_argument ("extent not in specified buffer or string", object);
|
|
|
4459 fl = decode_extent_at_flag (at_flag);
|
|
|
4460
|
|
665
|
4461 return extent_at_bytebpos (position, object, property, before_extent, fl, 1);
|
|
428
|
4462 }
|
|
|
4463
|
|
|
4464 /* ------------------------------- */
|
|
|
4465 /* verify_extent_modification() */
|
|
|
4466 /* ------------------------------- */
|
|
|
4467
|
|
|
4468 /* verify_extent_modification() is called when a buffer or string is
|
|
|
4469 modified to check whether the modification is occuring inside a
|
|
|
4470 read-only extent.
|
|
|
4471 */
|
|
|
4472
|
|
|
4473 struct verify_extents_arg
|
|
|
4474 {
|
|
|
4475 Lisp_Object object;
|
|
665
|
4476 Membpos start;
|
|
|
4477 Membpos end;
|
|
428
|
4478 Lisp_Object iro; /* value of inhibit-read-only */
|
|
|
4479 };
|
|
|
4480
|
|
|
4481 static int
|
|
|
4482 verify_extent_mapper (EXTENT extent, void *arg)
|
|
|
4483 {
|
|
|
4484 struct verify_extents_arg *closure = (struct verify_extents_arg *) arg;
|
|
|
4485 Lisp_Object prop = extent_read_only (extent);
|
|
|
4486
|
|
|
4487 if (NILP (prop))
|
|
|
4488 return 0;
|
|
|
4489
|
|
|
4490 if (CONSP (closure->iro) && !NILP (Fmemq (prop, closure->iro)))
|
|
|
4491 return 0;
|
|
|
4492
|
|
|
4493 #if 0 /* Nobody seems to care for this any more -sb */
|
|
|
4494 /* Allow deletion if the extent is completely contained in
|
|
|
4495 the region being deleted.
|
|
|
4496 This is important for supporting tokens which are internally
|
|
|
4497 write-protected, but which can be killed and yanked as a whole.
|
|
|
4498 Ignore open/closed distinctions at this point.
|
|
|
4499 -- Rose
|
|
|
4500 */
|
|
|
4501 if (closure->start != closure->end &&
|
|
|
4502 extent_start (extent) >= closure->start &&
|
|
|
4503 extent_end (extent) <= closure->end)
|
|
|
4504 return 0;
|
|
|
4505 #endif
|
|
|
4506
|
|
|
4507 while (1)
|
|
|
4508 Fsignal (Qbuffer_read_only, (list1 (closure->object)));
|
|
|
4509
|
|
|
4510 RETURN_NOT_REACHED(0)
|
|
|
4511 }
|
|
|
4512
|
|
|
4513 /* Value of Vinhibit_read_only is precomputed and passed in for
|
|
|
4514 efficiency */
|
|
|
4515
|
|
|
4516 void
|
|
665
|
4517 verify_extent_modification (Lisp_Object object, Bytebpos from, Bytebpos to,
|
|
428
|
4518 Lisp_Object inhibit_read_only_value)
|
|
|
4519 {
|
|
|
4520 int closed;
|
|
|
4521 struct verify_extents_arg closure;
|
|
|
4522
|
|
|
4523 /* If insertion, visit closed-endpoint extents touching the insertion
|
|
|
4524 point because the text would go inside those extents. If deletion,
|
|
|
4525 treat the range as open on both ends so that touching extents are not
|
|
|
4526 visited. Note that we assume that an insertion is occurring if the
|
|
|
4527 changed range has zero length, and a deletion otherwise. This
|
|
|
4528 fails if a change (i.e. non-insertion, non-deletion) is happening.
|
|
|
4529 As far as I know, this doesn't currently occur in XEmacs. --ben */
|
|
|
4530 closed = (from==to);
|
|
|
4531 closure.object = object;
|
|
665
|
4532 closure.start = buffer_or_string_bytebpos_to_membpos (object, from);
|
|
|
4533 closure.end = buffer_or_string_bytebpos_to_membpos (object, to);
|
|
428
|
4534 closure.iro = inhibit_read_only_value;
|
|
|
4535
|
|
665
|
4536 map_extents_bytebpos (from, to, verify_extent_mapper, (void *) &closure,
|
|
428
|
4537 object, 0, closed ? ME_END_CLOSED : ME_START_OPEN);
|
|
|
4538 }
|
|
|
4539
|
|
|
4540 /* ------------------------------------ */
|
|
|
4541 /* process_extents_for_insertion() */
|
|
|
4542 /* ------------------------------------ */
|
|
|
4543
|
|
|
4544 struct process_extents_for_insertion_arg
|
|
|
4545 {
|
|
665
|
4546 Bytebpos opoint;
|
|
428
|
4547 int length;
|
|
|
4548 Lisp_Object object;
|
|
|
4549 };
|
|
|
4550
|
|
|
4551 /* A region of length LENGTH was just inserted at OPOINT. Modify all
|
|
|
4552 of the extents as required for the insertion, based on their
|
|
|
4553 start-open/end-open properties.
|
|
|
4554 */
|
|
|
4555
|
|
|
4556 static int
|
|
|
4557 process_extents_for_insertion_mapper (EXTENT extent, void *arg)
|
|
|
4558 {
|
|
|
4559 struct process_extents_for_insertion_arg *closure =
|
|
|
4560 (struct process_extents_for_insertion_arg *) arg;
|
|
665
|
4561 Membpos indice = buffer_or_string_bytebpos_to_membpos (closure->object,
|
|
428
|
4562 closure->opoint);
|
|
|
4563
|
|
|
4564 /* When this function is called, one end of the newly-inserted text should
|
|
|
4565 be adjacent to some endpoint of the extent, or disjoint from it. If
|
|
|
4566 the insertion overlaps any existing extent, something is wrong.
|
|
|
4567 */
|
|
|
4568 #ifdef ERROR_CHECK_EXTENTS
|
|
|
4569 if (extent_start (extent) > indice &&
|
|
|
4570 extent_start (extent) < indice + closure->length)
|
|
|
4571 abort ();
|
|
|
4572 if (extent_end (extent) > indice &&
|
|
|
4573 extent_end (extent) < indice + closure->length)
|
|
|
4574 abort ();
|
|
|
4575 #endif
|
|
|
4576
|
|
|
4577 /* The extent-adjustment code adjusted the extent's endpoints as if
|
|
468
|
4578 all extents were closed-open -- endpoints at the insertion point
|
|
|
4579 remain unchanged. We need to fix the other kinds of extents:
|
|
|
4580
|
|
|
4581 1. Start position of start-open extents needs to be moved.
|
|
|
4582
|
|
|
4583 2. End position of end-closed extents needs to be moved.
|
|
|
4584
|
|
|
4585 Note that both conditions hold for zero-length (] extents at the
|
|
|
4586 insertion point. But under these rules, zero-length () extents
|
|
|
4587 would get adjusted such that their start is greater than their
|
|
|
4588 end; instead of allowing that, we treat them as [) extents by
|
|
|
4589 modifying condition #1 to not fire nothing when dealing with a
|
|
|
4590 zero-length open-open extent.
|
|
|
4591
|
|
|
4592 Existence of zero-length open-open extents is unfortunately an
|
|
|
4593 inelegant part of the extent model, but there is no way around
|
|
|
4594 it. */
|
|
428
|
4595
|
|
|
4596 {
|
|
665
|
4597 Membpos new_start = extent_start (extent);
|
|
|
4598 Membpos new_end = extent_end (extent);
|
|
468
|
4599
|
|
|
4600 if (indice == extent_start (extent) && extent_start_open_p (extent)
|
|
|
4601 /* zero-length () extents are exempt; see comment above. */
|
|
|
4602 && !(new_start == new_end && extent_end_open_p (extent))
|
|
|
4603 )
|
|
428
|
4604 new_start += closure->length;
|
|
|
4605 if (indice == extent_end (extent) && !extent_end_open_p (extent))
|
|
|
4606 new_end += closure->length;
|
|
468
|
4607
|
|
428
|
4608 set_extent_endpoints_1 (extent, new_start, new_end);
|
|
|
4609 }
|
|
|
4610
|
|
|
4611 return 0;
|
|
|
4612 }
|
|
|
4613
|
|
|
4614 void
|
|
665
|
4615 process_extents_for_insertion (Lisp_Object object, Bytebpos opoint,
|
|
428
|
4616 Bytecount length)
|
|
|
4617 {
|
|
|
4618 struct process_extents_for_insertion_arg closure;
|
|
|
4619
|
|
|
4620 closure.opoint = opoint;
|
|
|
4621 closure.length = length;
|
|
|
4622 closure.object = object;
|
|
|
4623
|
|
665
|
4624 map_extents_bytebpos (opoint, opoint + length,
|
|
428
|
4625 process_extents_for_insertion_mapper,
|
|
|
4626 (void *) &closure, object, 0,
|
|
|
4627 ME_END_CLOSED | ME_MIGHT_MODIFY_EXTENTS |
|
|
|
4628 ME_INCLUDE_INTERNAL);
|
|
|
4629 }
|
|
|
4630
|
|
|
4631 /* ------------------------------------ */
|
|
|
4632 /* process_extents_for_deletion() */
|
|
|
4633 /* ------------------------------------ */
|
|
|
4634
|
|
|
4635 struct process_extents_for_deletion_arg
|
|
|
4636 {
|
|
665
|
4637 Membpos start, end;
|
|
428
|
4638 int destroy_included_extents;
|
|
|
4639 };
|
|
|
4640
|
|
|
4641 /* This function is called when we're about to delete the range [from, to].
|
|
|
4642 Detach all of the extents that are completely inside the range [from, to],
|
|
|
4643 if they're detachable or open-open. */
|
|
|
4644
|
|
|
4645 static int
|
|
|
4646 process_extents_for_deletion_mapper (EXTENT extent, void *arg)
|
|
|
4647 {
|
|
|
4648 struct process_extents_for_deletion_arg *closure =
|
|
|
4649 (struct process_extents_for_deletion_arg *) arg;
|
|
|
4650
|
|
|
4651 /* If the extent lies completely within the range that
|
|
|
4652 is being deleted, then nuke the extent if it's detachable
|
|
|
4653 (otherwise, it will become a zero-length extent). */
|
|
|
4654
|
|
|
4655 if (closure->start <= extent_start (extent) &&
|
|
|
4656 extent_end (extent) <= closure->end)
|
|
|
4657 {
|
|
|
4658 if (extent_detachable_p (extent))
|
|
|
4659 {
|
|
|
4660 if (closure->destroy_included_extents)
|
|
|
4661 destroy_extent (extent);
|
|
|
4662 else
|
|
|
4663 extent_detach (extent);
|
|
|
4664 }
|
|
|
4665 }
|
|
|
4666
|
|
|
4667 return 0;
|
|
|
4668 }
|
|
|
4669
|
|
|
4670 /* DESTROY_THEM means destroy the extents instead of just deleting them.
|
|
|
4671 It is unused currently, but perhaps might be used (there used to
|
|
|
4672 be a function process_extents_for_destruction(), #if 0'd out,
|
|
|
4673 that did the equivalent). */
|
|
|
4674 void
|
|
665
|
4675 process_extents_for_deletion (Lisp_Object object, Bytebpos from,
|
|
|
4676 Bytebpos to, int destroy_them)
|
|
428
|
4677 {
|
|
|
4678 struct process_extents_for_deletion_arg closure;
|
|
|
4679
|
|
665
|
4680 closure.start = buffer_or_string_bytebpos_to_membpos (object, from);
|
|
|
4681 closure.end = buffer_or_string_bytebpos_to_membpos (object, to);
|
|
428
|
4682 closure.destroy_included_extents = destroy_them;
|
|
|
4683
|
|
665
|
4684 map_extents_bytebpos (from, to, process_extents_for_deletion_mapper,
|
|
428
|
4685 (void *) &closure, object, 0,
|
|
|
4686 ME_END_CLOSED | ME_MIGHT_MODIFY_EXTENTS);
|
|
|
4687 }
|
|
|
4688
|
|
|
4689 /* ------------------------------- */
|
|
|
4690 /* report_extent_modification() */
|
|
|
4691 /* ------------------------------- */
|
|
|
4692 struct report_extent_modification_closure {
|
|
|
4693 Lisp_Object buffer;
|
|
665
|
4694 Charbpos start, end;
|
|
428
|
4695 int afterp;
|
|
|
4696 int speccount;
|
|
|
4697 };
|
|
|
4698
|
|
|
4699 static Lisp_Object
|
|
|
4700 report_extent_modification_restore (Lisp_Object buffer)
|
|
|
4701 {
|
|
|
4702 if (current_buffer != XBUFFER (buffer))
|
|
|
4703 Fset_buffer (buffer);
|
|
|
4704 return Qnil;
|
|
|
4705 }
|
|
|
4706
|
|
|
4707 static int
|
|
|
4708 report_extent_modification_mapper (EXTENT extent, void *arg)
|
|
|
4709 {
|
|
|
4710 struct report_extent_modification_closure *closure =
|
|
|
4711 (struct report_extent_modification_closure *)arg;
|
|
|
4712 Lisp_Object exobj, startobj, endobj;
|
|
|
4713 Lisp_Object hook = (closure->afterp
|
|
|
4714 ? extent_after_change_functions (extent)
|
|
|
4715 : extent_before_change_functions (extent));
|
|
|
4716 if (NILP (hook))
|
|
|
4717 return 0;
|
|
|
4718
|
|
|
4719 XSETEXTENT (exobj, extent);
|
|
|
4720 XSETINT (startobj, closure->start);
|
|
|
4721 XSETINT (endobj, closure->end);
|
|
|
4722
|
|
|
4723 /* Now that we are sure to call elisp, set up an unwind-protect so
|
|
|
4724 inside_change_hook gets restored in case we throw. Also record
|
|
|
4725 the current buffer, in case we change it. Do the recording only
|
|
438
|
4726 once.
|
|
|
4727
|
|
|
4728 One confusing thing here is that our caller never actually calls
|
|
|
4729 unbind_to (closure.speccount, Qnil). This is because
|
|
665
|
4730 map_extents_bytebpos() unbinds before, and with a smaller
|
|
438
|
4731 speccount. The additional unbind_to() in
|
|
|
4732 report_extent_modification() would cause XEmacs to abort. */
|
|
428
|
4733 if (closure->speccount == -1)
|
|
|
4734 {
|
|
|
4735 closure->speccount = specpdl_depth ();
|
|
|
4736 record_unwind_protect (report_extent_modification_restore,
|
|
|
4737 Fcurrent_buffer ());
|
|
|
4738 }
|
|
|
4739
|
|
|
4740 /* The functions will expect closure->buffer to be the current
|
|
|
4741 buffer, so change it if it isn't. */
|
|
|
4742 if (current_buffer != XBUFFER (closure->buffer))
|
|
|
4743 Fset_buffer (closure->buffer);
|
|
|
4744
|
|
|
4745 /* #### It's a shame that we can't use any of the existing run_hook*
|
|
|
4746 functions here. This is so because all of them work with
|
|
|
4747 symbols, to be able to retrieve default values of local hooks.
|
|
438
|
4748 <sigh>
|
|
|
4749
|
|
|
4750 #### Idea: we could set up a dummy symbol, and call the hook
|
|
|
4751 functions on *that*. */
|
|
428
|
4752
|
|
|
4753 if (!CONSP (hook) || EQ (XCAR (hook), Qlambda))
|
|
|
4754 call3 (hook, exobj, startobj, endobj);
|
|
|
4755 else
|
|
|
4756 {
|
|
|
4757 Lisp_Object tail;
|
|
|
4758 EXTERNAL_LIST_LOOP (tail, hook)
|
|
438
|
4759 /* #### Shouldn't this perform the same Fset_buffer() check as
|
|
|
4760 above? */
|
|
428
|
4761 call3 (XCAR (tail), exobj, startobj, endobj);
|
|
|
4762 }
|
|
|
4763 return 0;
|
|
|
4764 }
|
|
|
4765
|
|
|
4766 void
|
|
665
|
4767 report_extent_modification (Lisp_Object buffer, Charbpos start, Charbpos end,
|
|
438
|
4768 int afterp)
|
|
428
|
4769 {
|
|
|
4770 struct report_extent_modification_closure closure;
|
|
|
4771
|
|
|
4772 closure.buffer = buffer;
|
|
|
4773 closure.start = start;
|
|
|
4774 closure.end = end;
|
|
|
4775 closure.afterp = afterp;
|
|
|
4776 closure.speccount = -1;
|
|
|
4777
|
|
|
4778 map_extents (start, end, report_extent_modification_mapper, (void *)&closure,
|
|
|
4779 buffer, NULL, ME_MIGHT_CALL_ELISP);
|
|
|
4780 }
|
|
|
4781
|
|
|
4782
|
|
|
4783 /************************************************************************/
|
|
|
4784 /* extent properties */
|
|
|
4785 /************************************************************************/
|
|
|
4786
|
|
|
4787 static void
|
|
|
4788 set_extent_invisible (EXTENT extent, Lisp_Object value)
|
|
|
4789 {
|
|
|
4790 if (!EQ (extent_invisible (extent), value))
|
|
|
4791 {
|
|
|
4792 set_extent_invisible_1 (extent, value);
|
|
|
4793 extent_changed_for_redisplay (extent, 1, 1);
|
|
|
4794 }
|
|
|
4795 }
|
|
|
4796
|
|
|
4797 /* This function does "memoization" -- similar to the interning
|
|
|
4798 that happens with symbols. Given a list of faces, an equivalent
|
|
|
4799 list is returned such that if this function is called twice with
|
|
|
4800 input that is `equal', the resulting outputs will be `eq'.
|
|
|
4801
|
|
|
4802 Note that the inputs and outputs are in general *not* `equal' --
|
|
|
4803 faces in symbol form become actual face objects in the output.
|
|
|
4804 This is necessary so that temporary faces stay around. */
|
|
|
4805
|
|
|
4806 static Lisp_Object
|
|
|
4807 memoize_extent_face_internal (Lisp_Object list)
|
|
|
4808 {
|
|
|
4809 int len;
|
|
|
4810 int thelen;
|
|
|
4811 Lisp_Object cons, thecons;
|
|
|
4812 Lisp_Object oldtail, tail;
|
|
|
4813 struct gcpro gcpro1;
|
|
|
4814
|
|
|
4815 if (NILP (list))
|
|
|
4816 return Qnil;
|
|
|
4817 if (!CONSP (list))
|
|
|
4818 return Fget_face (list);
|
|
|
4819
|
|
|
4820 /* To do the memoization, we use a hash table mapping from
|
|
|
4821 external lists to internal lists. We do `equal' comparisons
|
|
|
4822 on the keys so the memoization works correctly.
|
|
|
4823
|
|
|
4824 Note that we canonicalize things so that the keys in the
|
|
|
4825 hash table (the external lists) always contain symbols and
|
|
|
4826 the values (the internal lists) always contain face objects.
|
|
|
4827
|
|
|
4828 We also maintain a "reverse" table that maps from the internal
|
|
|
4829 lists to the external equivalents. The idea here is twofold:
|
|
|
4830
|
|
|
4831 1) `extent-face' wants to return a list containing face symbols
|
|
|
4832 rather than face objects.
|
|
|
4833 2) We don't want things to get quite so messed up if the user
|
|
|
4834 maliciously side-effects the returned lists.
|
|
|
4835 */
|
|
|
4836
|
|
|
4837 len = XINT (Flength (list));
|
|
|
4838 thelen = XINT (Flength (Vextent_face_reusable_list));
|
|
|
4839 oldtail = Qnil;
|
|
|
4840 tail = Qnil;
|
|
|
4841 GCPRO1 (oldtail);
|
|
|
4842
|
|
|
4843 /* We canonicalize the given list into another list.
|
|
|
4844 We try to avoid consing except when necessary, so we have
|
|
|
4845 a reusable list.
|
|
|
4846 */
|
|
|
4847
|
|
|
4848 if (thelen < len)
|
|
|
4849 {
|
|
|
4850 cons = Vextent_face_reusable_list;
|
|
|
4851 while (!NILP (XCDR (cons)))
|
|
|
4852 cons = XCDR (cons);
|
|
|
4853 XCDR (cons) = Fmake_list (make_int (len - thelen), Qnil);
|
|
|
4854 }
|
|
|
4855 else if (thelen > len)
|
|
|
4856 {
|
|
|
4857 int i;
|
|
|
4858
|
|
|
4859 /* Truncate the list temporarily so it's the right length;
|
|
|
4860 remember the old tail. */
|
|
|
4861 cons = Vextent_face_reusable_list;
|
|
|
4862 for (i = 0; i < len - 1; i++)
|
|
|
4863 cons = XCDR (cons);
|
|
|
4864 tail = cons;
|
|
|
4865 oldtail = XCDR (cons);
|
|
|
4866 XCDR (cons) = Qnil;
|
|
|
4867 }
|
|
|
4868
|
|
|
4869 thecons = Vextent_face_reusable_list;
|
|
|
4870 EXTERNAL_LIST_LOOP (cons, list)
|
|
|
4871 {
|
|
|
4872 Lisp_Object face = Fget_face (XCAR (cons));
|
|
|
4873
|
|
|
4874 XCAR (thecons) = Fface_name (face);
|
|
|
4875 thecons = XCDR (thecons);
|
|
|
4876 }
|
|
|
4877
|
|
|
4878 list = Fgethash (Vextent_face_reusable_list, Vextent_face_memoize_hash_table,
|
|
|
4879 Qnil);
|
|
|
4880 if (NILP (list))
|
|
|
4881 {
|
|
|
4882 Lisp_Object symlist = Fcopy_sequence (Vextent_face_reusable_list);
|
|
|
4883 Lisp_Object facelist = Fcopy_sequence (Vextent_face_reusable_list);
|
|
|
4884
|
|
|
4885 LIST_LOOP (cons, facelist)
|
|
|
4886 {
|
|
|
4887 XCAR (cons) = Fget_face (XCAR (cons));
|
|
|
4888 }
|
|
|
4889 Fputhash (symlist, facelist, Vextent_face_memoize_hash_table);
|
|
|
4890 Fputhash (facelist, symlist, Vextent_face_reverse_memoize_hash_table);
|
|
|
4891 list = facelist;
|
|
|
4892 }
|
|
|
4893
|
|
|
4894 /* Now restore the truncated tail of the reusable list, if necessary. */
|
|
|
4895 if (!NILP (tail))
|
|
|
4896 XCDR (tail) = oldtail;
|
|
|
4897
|
|
|
4898 UNGCPRO;
|
|
|
4899 return list;
|
|
|
4900 }
|
|
|
4901
|
|
|
4902 static Lisp_Object
|
|
|
4903 external_of_internal_memoized_face (Lisp_Object face)
|
|
|
4904 {
|
|
|
4905 if (NILP (face))
|
|
|
4906 return Qnil;
|
|
|
4907 else if (!CONSP (face))
|
|
|
4908 return XFACE (face)->name;
|
|
|
4909 else
|
|
|
4910 {
|
|
|
4911 face = Fgethash (face, Vextent_face_reverse_memoize_hash_table,
|
|
|
4912 Qunbound);
|
|
|
4913 assert (!UNBOUNDP (face));
|
|
|
4914 return face;
|
|
|
4915 }
|
|
|
4916 }
|
|
|
4917
|
|
|
4918 static Lisp_Object
|
|
|
4919 canonicalize_extent_property (Lisp_Object prop, Lisp_Object value)
|
|
|
4920 {
|
|
|
4921 if (EQ (prop, Qface) || EQ (prop, Qmouse_face))
|
|
|
4922 value = (external_of_internal_memoized_face
|
|
|
4923 (memoize_extent_face_internal (value)));
|
|
|
4924 return value;
|
|
|
4925 }
|
|
|
4926
|
|
|
4927 /* Do we need a lisp-level function ? */
|
|
|
4928 DEFUN ("set-extent-initial-redisplay-function", Fset_extent_initial_redisplay_function,
|
|
444
|
4929 2,2,0, /*
|
|
428
|
4930 Note: This feature is experimental!
|
|
|
4931
|
|
|
4932 Set initial-redisplay-function of EXTENT to the function
|
|
|
4933 FUNCTION.
|
|
|
4934
|
|
|
4935 The first time the EXTENT is (re)displayed, an eval event will be
|
|
|
4936 dispatched calling FUNCTION with EXTENT as its only argument.
|
|
|
4937 */
|
|
|
4938 (extent, function))
|
|
|
4939 {
|
|
|
4940 EXTENT e = decode_extent(extent, DE_MUST_BE_ATTACHED);
|
|
|
4941
|
|
|
4942 e = extent_ancestor (e); /* Is this needed? Macro also does chasing!*/
|
|
|
4943 set_extent_initial_redisplay_function(e,function);
|
|
|
4944 extent_in_red_event_p(e) = 0; /* If the function changed we can spawn
|
|
|
4945 new events */
|
|
|
4946 extent_changed_for_redisplay(e,1,0); /* Do we need to mark children too ?*/
|
|
|
4947
|
|
|
4948 return function;
|
|
|
4949 }
|
|
|
4950
|
|
|
4951 DEFUN ("extent-face", Fextent_face, 1, 1, 0, /*
|
|
|
4952 Return the name of the face in which EXTENT is displayed, or nil
|
|
|
4953 if the extent's face is unspecified. This might also return a list
|
|
|
4954 of face names.
|
|
|
4955 */
|
|
|
4956 (extent))
|
|
|
4957 {
|
|
|
4958 Lisp_Object face;
|
|
|
4959
|
|
|
4960 CHECK_EXTENT (extent);
|
|
|
4961 face = extent_face (XEXTENT (extent));
|
|
|
4962
|
|
|
4963 return external_of_internal_memoized_face (face);
|
|
|
4964 }
|
|
|
4965
|
|
|
4966 DEFUN ("set-extent-face", Fset_extent_face, 2, 2, 0, /*
|
|
|
4967 Make the given EXTENT have the graphic attributes specified by FACE.
|
|
|
4968 FACE can also be a list of faces, and all faces listed will apply,
|
|
|
4969 with faces earlier in the list taking priority over those later in the
|
|
|
4970 list.
|
|
|
4971 */
|
|
|
4972 (extent, face))
|
|
|
4973 {
|
|
|
4974 EXTENT e = decode_extent(extent, 0);
|
|
|
4975 Lisp_Object orig_face = face;
|
|
|
4976
|
|
|
4977 /* retrieve the ancestor for efficiency and proper redisplay noting. */
|
|
|
4978 e = extent_ancestor (e);
|
|
|
4979
|
|
|
4980 face = memoize_extent_face_internal (face);
|
|
|
4981
|
|
|
4982 extent_face (e) = face;
|
|
|
4983 extent_changed_for_redisplay (e, 1, 0);
|
|
|
4984
|
|
|
4985 return orig_face;
|
|
|
4986 }
|
|
|
4987
|
|
|
4988
|
|
|
4989 DEFUN ("extent-mouse-face", Fextent_mouse_face, 1, 1, 0, /*
|
|
|
4990 Return the face used to highlight EXTENT when the mouse passes over it.
|
|
|
4991 The return value will be a face name, a list of face names, or nil
|
|
|
4992 if the extent's mouse face is unspecified.
|
|
|
4993 */
|
|
|
4994 (extent))
|
|
|
4995 {
|
|
|
4996 Lisp_Object face;
|
|
|
4997
|
|
|
4998 CHECK_EXTENT (extent);
|
|
|
4999 face = extent_mouse_face (XEXTENT (extent));
|
|
|
5000
|
|
|
5001 return external_of_internal_memoized_face (face);
|
|
|
5002 }
|
|
|
5003
|
|
|
5004 DEFUN ("set-extent-mouse-face", Fset_extent_mouse_face, 2, 2, 0, /*
|
|
|
5005 Set the face used to highlight EXTENT when the mouse passes over it.
|
|
|
5006 FACE can also be a list of faces, and all faces listed will apply,
|
|
|
5007 with faces earlier in the list taking priority over those later in the
|
|
|
5008 list.
|
|
|
5009 */
|
|
|
5010 (extent, face))
|
|
|
5011 {
|
|
|
5012 EXTENT e;
|
|
|
5013 Lisp_Object orig_face = face;
|
|
|
5014
|
|
|
5015 CHECK_EXTENT (extent);
|
|
|
5016 e = XEXTENT (extent);
|
|
|
5017 /* retrieve the ancestor for efficiency and proper redisplay noting. */
|
|
|
5018 e = extent_ancestor (e);
|
|
|
5019
|
|
|
5020 face = memoize_extent_face_internal (face);
|
|
|
5021
|
|
|
5022 set_extent_mouse_face (e, face);
|
|
|
5023 extent_changed_for_redisplay (e, 1, 0);
|
|
|
5024
|
|
|
5025 return orig_face;
|
|
|
5026 }
|
|
|
5027
|
|
|
5028 void
|
|
|
5029 set_extent_glyph (EXTENT extent, Lisp_Object glyph, int endp,
|
|
|
5030 glyph_layout layout)
|
|
|
5031 {
|
|
|
5032 extent = extent_ancestor (extent);
|
|
|
5033
|
|
|
5034 if (!endp)
|
|
|
5035 {
|
|
|
5036 set_extent_begin_glyph (extent, glyph);
|
|
647
|
5037 set_extent_begin_glyph_layout (extent, layout);
|
|
428
|
5038 }
|
|
|
5039 else
|
|
|
5040 {
|
|
|
5041 set_extent_end_glyph (extent, glyph);
|
|
647
|
5042 set_extent_end_glyph_layout (extent, layout);
|
|
428
|
5043 }
|
|
|
5044
|
|
|
5045 extent_changed_for_redisplay (extent, 1, 0);
|
|
|
5046 }
|
|
|
5047
|
|
|
5048 static Lisp_Object
|
|
|
5049 glyph_layout_to_symbol (glyph_layout layout)
|
|
|
5050 {
|
|
|
5051 switch (layout)
|
|
|
5052 {
|
|
|
5053 case GL_TEXT: return Qtext;
|
|
|
5054 case GL_OUTSIDE_MARGIN: return Qoutside_margin;
|
|
|
5055 case GL_INSIDE_MARGIN: return Qinside_margin;
|
|
|
5056 case GL_WHITESPACE: return Qwhitespace;
|
|
|
5057 default:
|
|
|
5058 abort ();
|
|
|
5059 return Qnil; /* unreached */
|
|
|
5060 }
|
|
|
5061 }
|
|
|
5062
|
|
|
5063 static glyph_layout
|
|
|
5064 symbol_to_glyph_layout (Lisp_Object layout_obj)
|
|
|
5065 {
|
|
|
5066 if (NILP (layout_obj))
|
|
|
5067 return GL_TEXT;
|
|
|
5068
|
|
|
5069 CHECK_SYMBOL (layout_obj);
|
|
|
5070 if (EQ (layout_obj, Qoutside_margin)) return GL_OUTSIDE_MARGIN;
|
|
|
5071 if (EQ (layout_obj, Qinside_margin)) return GL_INSIDE_MARGIN;
|
|
|
5072 if (EQ (layout_obj, Qwhitespace)) return GL_WHITESPACE;
|
|
|
5073 if (EQ (layout_obj, Qtext)) return GL_TEXT;
|
|
|
5074
|
|
563
|
5075 invalid_constant ("Unknown glyph layout type", layout_obj);
|
|
428
|
5076 return GL_TEXT; /* unreached */
|
|
|
5077 }
|
|
|
5078
|
|
|
5079 static Lisp_Object
|
|
|
5080 set_extent_glyph_1 (Lisp_Object extent_obj, Lisp_Object glyph, int endp,
|
|
|
5081 Lisp_Object layout_obj)
|
|
|
5082 {
|
|
442
|
5083 EXTENT extent = decode_extent (extent_obj, 0);
|
|
428
|
5084 glyph_layout layout = symbol_to_glyph_layout (layout_obj);
|
|
|
5085
|
|
|
5086 /* Make sure we've actually been given a valid glyph or it's nil
|
|
|
5087 (meaning we're deleting a glyph from an extent). */
|
|
|
5088 if (!NILP (glyph))
|
|
|
5089 CHECK_BUFFER_GLYPH (glyph);
|
|
|
5090
|
|
|
5091 set_extent_glyph (extent, glyph, endp, layout);
|
|
|
5092 return glyph;
|
|
|
5093 }
|
|
|
5094
|
|
|
5095 DEFUN ("set-extent-begin-glyph", Fset_extent_begin_glyph, 2, 3, 0, /*
|
|
|
5096 Display a bitmap, subwindow or string at the beginning of EXTENT.
|
|
|
5097 BEGIN-GLYPH must be a glyph object. The layout policy defaults to `text'.
|
|
|
5098 */
|
|
|
5099 (extent, begin_glyph, layout))
|
|
|
5100 {
|
|
|
5101 return set_extent_glyph_1 (extent, begin_glyph, 0, layout);
|
|
|
5102 }
|
|
|
5103
|
|
|
5104 DEFUN ("set-extent-end-glyph", Fset_extent_end_glyph, 2, 3, 0, /*
|
|
|
5105 Display a bitmap, subwindow or string at the end of EXTENT.
|
|
|
5106 END-GLYPH must be a glyph object. The layout policy defaults to `text'.
|
|
|
5107 */
|
|
|
5108 (extent, end_glyph, layout))
|
|
|
5109 {
|
|
|
5110 return set_extent_glyph_1 (extent, end_glyph, 1, layout);
|
|
|
5111 }
|
|
|
5112
|
|
|
5113 DEFUN ("extent-begin-glyph", Fextent_begin_glyph, 1, 1, 0, /*
|
|
|
5114 Return the glyph object displayed at the beginning of EXTENT.
|
|
|
5115 If there is none, nil is returned.
|
|
|
5116 */
|
|
|
5117 (extent))
|
|
|
5118 {
|
|
|
5119 return extent_begin_glyph (decode_extent (extent, 0));
|
|
|
5120 }
|
|
|
5121
|
|
|
5122 DEFUN ("extent-end-glyph", Fextent_end_glyph, 1, 1, 0, /*
|
|
|
5123 Return the glyph object displayed at the end of EXTENT.
|
|
|
5124 If there is none, nil is returned.
|
|
|
5125 */
|
|
|
5126 (extent))
|
|
|
5127 {
|
|
|
5128 return extent_end_glyph (decode_extent (extent, 0));
|
|
|
5129 }
|
|
|
5130
|
|
|
5131 DEFUN ("set-extent-begin-glyph-layout", Fset_extent_begin_glyph_layout, 2, 2, 0, /*
|
|
|
5132 Set the layout policy of EXTENT's begin glyph.
|
|
|
5133 Access this using the `extent-begin-glyph-layout' function.
|
|
|
5134 */
|
|
|
5135 (extent, layout))
|
|
|
5136 {
|
|
|
5137 EXTENT e = decode_extent (extent, 0);
|
|
|
5138 e = extent_ancestor (e);
|
|
647
|
5139 set_extent_begin_glyph_layout (e, symbol_to_glyph_layout (layout));
|
|
428
|
5140 extent_maybe_changed_for_redisplay (e, 1, 0);
|
|
|
5141 return layout;
|
|
|
5142 }
|
|
|
5143
|
|
|
5144 DEFUN ("set-extent-end-glyph-layout", Fset_extent_end_glyph_layout, 2, 2, 0, /*
|
|
|
5145 Set the layout policy of EXTENT's end glyph.
|
|
|
5146 Access this using the `extent-end-glyph-layout' function.
|
|
|
5147 */
|
|
|
5148 (extent, layout))
|
|
|
5149 {
|
|
|
5150 EXTENT e = decode_extent (extent, 0);
|
|
|
5151 e = extent_ancestor (e);
|
|
647
|
5152 set_extent_end_glyph_layout (e, symbol_to_glyph_layout (layout));
|
|
428
|
5153 extent_maybe_changed_for_redisplay (e, 1, 0);
|
|
|
5154 return layout;
|
|
|
5155 }
|
|
|
5156
|
|
|
5157 DEFUN ("extent-begin-glyph-layout", Fextent_begin_glyph_layout, 1, 1, 0, /*
|
|
|
5158 Return the layout policy associated with EXTENT's begin glyph.
|
|
|
5159 Set this using the `set-extent-begin-glyph-layout' function.
|
|
|
5160 */
|
|
|
5161 (extent))
|
|
|
5162 {
|
|
|
5163 EXTENT e = decode_extent (extent, 0);
|
|
|
5164 return glyph_layout_to_symbol ((glyph_layout) extent_begin_glyph_layout (e));
|
|
|
5165 }
|
|
|
5166
|
|
|
5167 DEFUN ("extent-end-glyph-layout", Fextent_end_glyph_layout, 1, 1, 0, /*
|
|
|
5168 Return the layout policy associated with EXTENT's end glyph.
|
|
|
5169 Set this using the `set-extent-end-glyph-layout' function.
|
|
|
5170 */
|
|
|
5171 (extent))
|
|
|
5172 {
|
|
|
5173 EXTENT e = decode_extent (extent, 0);
|
|
|
5174 return glyph_layout_to_symbol ((glyph_layout) extent_end_glyph_layout (e));
|
|
|
5175 }
|
|
|
5176
|
|
|
5177 DEFUN ("set-extent-priority", Fset_extent_priority, 2, 2, 0, /*
|
|
|
5178 Set the display priority of EXTENT to PRIORITY (an integer).
|
|
|
5179 When the extent attributes are being merged for display, the priority
|
|
|
5180 is used to determine which extent takes precedence in the event of a
|
|
|
5181 conflict (two extents whose faces both specify font, for example: the
|
|
|
5182 font of the extent with the higher priority will be used).
|
|
|
5183 Extents are created with priority 0; priorities may be negative.
|
|
|
5184 */
|
|
|
5185 (extent, priority))
|
|
|
5186 {
|
|
|
5187 EXTENT e = decode_extent (extent, 0);
|
|
|
5188
|
|
|
5189 CHECK_INT (priority);
|
|
|
5190 e = extent_ancestor (e);
|
|
|
5191 set_extent_priority (e, XINT (priority));
|
|
|
5192 extent_maybe_changed_for_redisplay (e, 1, 0);
|
|
|
5193 return priority;
|
|
|
5194 }
|
|
|
5195
|
|
|
5196 DEFUN ("extent-priority", Fextent_priority, 1, 1, 0, /*
|
|
|
5197 Return the display priority of EXTENT; see `set-extent-priority'.
|
|
|
5198 */
|
|
|
5199 (extent))
|
|
|
5200 {
|
|
|
5201 EXTENT e = decode_extent (extent, 0);
|
|
|
5202 return make_int (extent_priority (e));
|
|
|
5203 }
|
|
|
5204
|
|
|
5205 DEFUN ("set-extent-property", Fset_extent_property, 3, 3, 0, /*
|
|
|
5206 Change a property of an extent.
|
|
|
5207 PROPERTY may be any symbol; the value stored may be accessed with
|
|
|
5208 the `extent-property' function.
|
|
|
5209 The following symbols have predefined meanings:
|
|
|
5210
|
|
|
5211 detached Removes the extent from its buffer; setting this is
|
|
|
5212 the same as calling `detach-extent'.
|
|
|
5213
|
|
|
5214 destroyed Removes the extent from its buffer, and makes it
|
|
|
5215 unusable in the future; this is the same calling
|
|
|
5216 `delete-extent'.
|
|
|
5217
|
|
|
5218 priority Change redisplay priority; same as `set-extent-priority'.
|
|
|
5219
|
|
|
5220 start-open Whether the set of characters within the extent is
|
|
|
5221 treated being open on the left, that is, whether
|
|
|
5222 the start position is an exclusive, rather than
|
|
|
5223 inclusive, boundary. If true, then characters
|
|
|
5224 inserted exactly at the beginning of the extent
|
|
|
5225 will remain outside of the extent; otherwise they
|
|
|
5226 will go into the extent, extending it.
|
|
|
5227
|
|
|
5228 end-open Whether the set of characters within the extent is
|
|
|
5229 treated being open on the right, that is, whether
|
|
|
5230 the end position is an exclusive, rather than
|
|
|
5231 inclusive, boundary. If true, then characters
|
|
|
5232 inserted exactly at the end of the extent will
|
|
|
5233 remain outside of the extent; otherwise they will
|
|
|
5234 go into the extent, extending it.
|
|
|
5235
|
|
|
5236 By default, extents have the `end-open' but not the
|
|
|
5237 `start-open' property set.
|
|
|
5238
|
|
|
5239 read-only Text within this extent will be unmodifiable.
|
|
|
5240
|
|
|
5241 initial-redisplay-function (EXPERIMENTAL)
|
|
|
5242 function to be called the first time (part of) the extent
|
|
|
5243 is redisplayed. It will be called with the extent as its
|
|
|
5244 first argument.
|
|
|
5245 Note: The function will not be called immediately
|
|
|
5246 during redisplay, an eval event will be dispatched.
|
|
|
5247
|
|
|
5248 detachable Whether the extent gets detached (as with
|
|
|
5249 `detach-extent') when all the text within the
|
|
|
5250 extent is deleted. This is true by default. If
|
|
|
5251 this property is not set, the extent becomes a
|
|
|
5252 zero-length extent when its text is deleted. (In
|
|
|
5253 such a case, the `start-open' property is
|
|
|
5254 automatically removed if both the `start-open' and
|
|
|
5255 `end-open' properties are set, since zero-length
|
|
|
5256 extents open on both ends are not allowed.)
|
|
|
5257
|
|
|
5258 face The face in which to display the text. Setting
|
|
|
5259 this is the same as calling `set-extent-face'.
|
|
|
5260
|
|
|
5261 mouse-face If non-nil, the extent will be highlighted in this
|
|
|
5262 face when the mouse moves over it.
|
|
|
5263
|
|
|
5264 pointer If non-nil, and a valid pointer glyph, this specifies
|
|
|
5265 the shape of the mouse pointer while over the extent.
|
|
|
5266
|
|
|
5267 highlight Obsolete: Setting this property is equivalent to
|
|
|
5268 setting a `mouse-face' property of `highlight'.
|
|
|
5269 Reading this property returns non-nil if
|
|
|
5270 the extent has a non-nil `mouse-face' property.
|
|
|
5271
|
|
|
5272 duplicable Whether this extent should be copied into strings,
|
|
|
5273 so that kill, yank, and undo commands will restore
|
|
|
5274 or copy it. `duplicable' extents are copied from
|
|
|
5275 an extent into a string when `buffer-substring' or
|
|
|
5276 a similar function creates a string. The extents
|
|
|
5277 in a string are copied into other strings created
|
|
|
5278 from the string using `concat' or `substring'.
|
|
|
5279 When `insert' or a similar function inserts the
|
|
|
5280 string into a buffer, the extents are copied back
|
|
|
5281 into the buffer.
|
|
|
5282
|
|
|
5283 unique Meaningful only in conjunction with `duplicable'.
|
|
|
5284 When this is set, there may be only one instance
|
|
|
5285 of this extent attached at a time: if it is copied
|
|
|
5286 to the kill ring and then yanked, the extent is
|
|
|
5287 not copied. If, however, it is killed (removed
|
|
|
5288 from the buffer) and then yanked, it will be
|
|
|
5289 re-attached at the new position.
|
|
|
5290
|
|
|
5291 invisible If the value is non-nil, text under this extent
|
|
|
5292 may be treated as not present for the purpose of
|
|
|
5293 redisplay, or may be displayed using an ellipsis
|
|
|
5294 or other marker; see `buffer-invisibility-spec'
|
|
|
5295 and `invisible-text-glyph'. In all cases,
|
|
|
5296 however, the text is still visible to other
|
|
|
5297 functions that examine a buffer's text.
|
|
|
5298
|
|
|
5299 keymap This keymap is consulted for mouse clicks on this
|
|
|
5300 extent, or keypresses made while point is within the
|
|
|
5301 extent.
|
|
|
5302
|
|
|
5303 copy-function This is a hook that is run when a duplicable extent
|
|
|
5304 is about to be copied from a buffer to a string (or
|
|
|
5305 the kill ring). It is called with three arguments,
|
|
|
5306 the extent, and the buffer-positions within it
|
|
|
5307 which are being copied. If this function returns
|
|
|
5308 nil, then the extent will not be copied; otherwise
|
|
|
5309 it will.
|
|
|
5310
|
|
|
5311 paste-function This is a hook that is run when a duplicable extent is
|
|
|
5312 about to be copied from a string (or the kill ring)
|
|
|
5313 into a buffer. It is called with three arguments,
|
|
|
5314 the original extent, and the buffer positions which
|
|
|
5315 the copied extent will occupy. (This hook is run
|
|
|
5316 after the corresponding text has already been
|
|
|
5317 inserted into the buffer.) Note that the extent
|
|
|
5318 argument may be detached when this function is run.
|
|
|
5319 If this function returns nil, no extent will be
|
|
|
5320 inserted. Otherwise, there will be an extent
|
|
|
5321 covering the range in question.
|
|
|
5322
|
|
|
5323 If the original extent is not attached to a buffer,
|
|
|
5324 then it will be re-attached at this range.
|
|
|
5325 Otherwise, a copy will be made, and that copy
|
|
|
5326 attached here.
|
|
|
5327
|
|
|
5328 The copy-function and paste-function are meaningful
|
|
|
5329 only for extents with the `duplicable' flag set,
|
|
|
5330 and if they are not specified, behave as if `t' was
|
|
|
5331 the returned value. When these hooks are invoked,
|
|
|
5332 the current buffer is the buffer which the extent
|
|
|
5333 is being copied from/to, respectively.
|
|
|
5334
|
|
|
5335 begin-glyph A glyph to be displayed at the beginning of the extent,
|
|
|
5336 or nil.
|
|
|
5337
|
|
|
5338 end-glyph A glyph to be displayed at the end of the extent,
|
|
|
5339 or nil.
|
|
|
5340
|
|
|
5341 begin-glyph-layout The layout policy (one of `text', `whitespace',
|
|
|
5342 `inside-margin', or `outside-margin') of the extent's
|
|
|
5343 begin glyph.
|
|
|
5344
|
|
|
5345 end-glyph-layout The layout policy of the extent's end glyph.
|
|
|
5346 */
|
|
|
5347 (extent, property, value))
|
|
|
5348 {
|
|
|
5349 /* This function can GC if property is `keymap' */
|
|
|
5350 EXTENT e = decode_extent (extent, 0);
|
|
|
5351
|
|
|
5352 if (EQ (property, Qread_only))
|
|
|
5353 set_extent_read_only (e, value);
|
|
|
5354 else if (EQ (property, Qunique))
|
|
|
5355 extent_unique_p (e) = !NILP (value);
|
|
|
5356 else if (EQ (property, Qduplicable))
|
|
|
5357 extent_duplicable_p (e) = !NILP (value);
|
|
|
5358 else if (EQ (property, Qinvisible))
|
|
|
5359 set_extent_invisible (e, value);
|
|
|
5360 else if (EQ (property, Qdetachable))
|
|
|
5361 extent_detachable_p (e) = !NILP (value);
|
|
|
5362
|
|
|
5363 else if (EQ (property, Qdetached))
|
|
|
5364 {
|
|
|
5365 if (NILP (value))
|
|
563
|
5366 invalid_operation ("can only set `detached' to t", Qunbound);
|
|
428
|
5367 Fdetach_extent (extent);
|
|
|
5368 }
|
|
|
5369 else if (EQ (property, Qdestroyed))
|
|
|
5370 {
|
|
|
5371 if (NILP (value))
|
|
563
|
5372 invalid_operation ("can only set `destroyed' to t", Qunbound);
|
|
428
|
5373 Fdelete_extent (extent);
|
|
|
5374 }
|
|
|
5375 else if (EQ (property, Qpriority))
|
|
|
5376 Fset_extent_priority (extent, value);
|
|
|
5377 else if (EQ (property, Qface))
|
|
|
5378 Fset_extent_face (extent, value);
|
|
|
5379 else if (EQ (property, Qinitial_redisplay_function))
|
|
|
5380 Fset_extent_initial_redisplay_function (extent, value);
|
|
|
5381 else if (EQ (property, Qbefore_change_functions))
|
|
|
5382 set_extent_before_change_functions (e, value);
|
|
|
5383 else if (EQ (property, Qafter_change_functions))
|
|
|
5384 set_extent_after_change_functions (e, value);
|
|
|
5385 else if (EQ (property, Qmouse_face))
|
|
|
5386 Fset_extent_mouse_face (extent, value);
|
|
|
5387 /* Obsolete: */
|
|
|
5388 else if (EQ (property, Qhighlight))
|
|
|
5389 Fset_extent_mouse_face (extent, Qhighlight);
|
|
|
5390 else if (EQ (property, Qbegin_glyph_layout))
|
|
|
5391 Fset_extent_begin_glyph_layout (extent, value);
|
|
|
5392 else if (EQ (property, Qend_glyph_layout))
|
|
|
5393 Fset_extent_end_glyph_layout (extent, value);
|
|
|
5394 /* For backwards compatibility. We use begin glyph because it is by
|
|
|
5395 far the more used of the two. */
|
|
|
5396 else if (EQ (property, Qglyph_layout))
|
|
|
5397 Fset_extent_begin_glyph_layout (extent, value);
|
|
|
5398 else if (EQ (property, Qbegin_glyph))
|
|
|
5399 Fset_extent_begin_glyph (extent, value, Qnil);
|
|
|
5400 else if (EQ (property, Qend_glyph))
|
|
|
5401 Fset_extent_end_glyph (extent, value, Qnil);
|
|
|
5402 else if (EQ (property, Qstart_open))
|
|
|
5403 set_extent_openness (e, !NILP (value), -1);
|
|
|
5404 else if (EQ (property, Qend_open))
|
|
|
5405 set_extent_openness (e, -1, !NILP (value));
|
|
|
5406 /* Support (but don't document...) the obvious *_closed antonyms. */
|
|
|
5407 else if (EQ (property, Qstart_closed))
|
|
|
5408 set_extent_openness (e, NILP (value), -1);
|
|
|
5409 else if (EQ (property, Qend_closed))
|
|
|
5410 set_extent_openness (e, -1, NILP (value));
|
|
|
5411 else
|
|
|
5412 {
|
|
|
5413 if (EQ (property, Qkeymap))
|
|
|
5414 while (!NILP (value) && NILP (Fkeymapp (value)))
|
|
|
5415 value = wrong_type_argument (Qkeymapp, value);
|
|
|
5416
|
|
|
5417 external_plist_put (extent_plist_addr (e), property, value, 0, ERROR_ME);
|
|
|
5418 }
|
|
|
5419
|
|
|
5420 return value;
|
|
|
5421 }
|
|
|
5422
|
|
|
5423 DEFUN ("set-extent-properties", Fset_extent_properties, 2, 2, 0, /*
|
|
|
5424 Change some properties of EXTENT.
|
|
|
5425 PLIST is a property list.
|
|
|
5426 For a list of built-in properties, see `set-extent-property'.
|
|
|
5427 */
|
|
|
5428 (extent, plist))
|
|
|
5429 {
|
|
|
5430 /* This function can GC, if one of the properties is `keymap' */
|
|
|
5431 Lisp_Object property, value;
|
|
|
5432 struct gcpro gcpro1;
|
|
|
5433 GCPRO1 (plist);
|
|
|
5434
|
|
|
5435 plist = Fcopy_sequence (plist);
|
|
|
5436 Fcanonicalize_plist (plist, Qnil);
|
|
|
5437
|
|
|
5438 while (!NILP (plist))
|
|
|
5439 {
|
|
|
5440 property = Fcar (plist); plist = Fcdr (plist);
|
|
|
5441 value = Fcar (plist); plist = Fcdr (plist);
|
|
|
5442 Fset_extent_property (extent, property, value);
|
|
|
5443 }
|
|
|
5444 UNGCPRO;
|
|
|
5445 return Qnil;
|
|
|
5446 }
|
|
|
5447
|
|
|
5448 DEFUN ("extent-property", Fextent_property, 2, 3, 0, /*
|
|
|
5449 Return EXTENT's value for property PROPERTY.
|
|
444
|
5450 If no such property exists, DEFAULT is returned.
|
|
428
|
5451 See `set-extent-property' for the built-in property names.
|
|
|
5452 */
|
|
|
5453 (extent, property, default_))
|
|
|
5454 {
|
|
|
5455 EXTENT e = decode_extent (extent, 0);
|
|
|
5456
|
|
|
5457 if (EQ (property, Qdetached))
|
|
|
5458 return extent_detached_p (e) ? Qt : Qnil;
|
|
|
5459 else if (EQ (property, Qdestroyed))
|
|
|
5460 return !EXTENT_LIVE_P (e) ? Qt : Qnil;
|
|
|
5461 else if (EQ (property, Qstart_open))
|
|
|
5462 return extent_normal_field (e, start_open) ? Qt : Qnil;
|
|
|
5463 else if (EQ (property, Qend_open))
|
|
|
5464 return extent_normal_field (e, end_open) ? Qt : Qnil;
|
|
|
5465 else if (EQ (property, Qunique))
|
|
|
5466 return extent_normal_field (e, unique) ? Qt : Qnil;
|
|
|
5467 else if (EQ (property, Qduplicable))
|
|
|
5468 return extent_normal_field (e, duplicable) ? Qt : Qnil;
|
|
|
5469 else if (EQ (property, Qdetachable))
|
|
|
5470 return extent_normal_field (e, detachable) ? Qt : Qnil;
|
|
|
5471 /* Support (but don't document...) the obvious *_closed antonyms. */
|
|
|
5472 else if (EQ (property, Qstart_closed))
|
|
|
5473 return extent_start_open_p (e) ? Qnil : Qt;
|
|
|
5474 else if (EQ (property, Qend_closed))
|
|
|
5475 return extent_end_open_p (e) ? Qnil : Qt;
|
|
|
5476 else if (EQ (property, Qpriority))
|
|
|
5477 return make_int (extent_priority (e));
|
|
|
5478 else if (EQ (property, Qread_only))
|
|
|
5479 return extent_read_only (e);
|
|
|
5480 else if (EQ (property, Qinvisible))
|
|
|
5481 return extent_invisible (e);
|
|
|
5482 else if (EQ (property, Qface))
|
|
|
5483 return Fextent_face (extent);
|
|
|
5484 else if (EQ (property, Qinitial_redisplay_function))
|
|
|
5485 return extent_initial_redisplay_function (e);
|
|
|
5486 else if (EQ (property, Qbefore_change_functions))
|
|
|
5487 return extent_before_change_functions (e);
|
|
|
5488 else if (EQ (property, Qafter_change_functions))
|
|
|
5489 return extent_after_change_functions (e);
|
|
|
5490 else if (EQ (property, Qmouse_face))
|
|
|
5491 return Fextent_mouse_face (extent);
|
|
|
5492 /* Obsolete: */
|
|
|
5493 else if (EQ (property, Qhighlight))
|
|
|
5494 return !NILP (Fextent_mouse_face (extent)) ? Qt : Qnil;
|
|
|
5495 else if (EQ (property, Qbegin_glyph_layout))
|
|
|
5496 return Fextent_begin_glyph_layout (extent);
|
|
|
5497 else if (EQ (property, Qend_glyph_layout))
|
|
|
5498 return Fextent_end_glyph_layout (extent);
|
|
|
5499 /* For backwards compatibility. We use begin glyph because it is by
|
|
|
5500 far the more used of the two. */
|
|
|
5501 else if (EQ (property, Qglyph_layout))
|
|
|
5502 return Fextent_begin_glyph_layout (extent);
|
|
|
5503 else if (EQ (property, Qbegin_glyph))
|
|
|
5504 return extent_begin_glyph (e);
|
|
|
5505 else if (EQ (property, Qend_glyph))
|
|
|
5506 return extent_end_glyph (e);
|
|
|
5507 else
|
|
|
5508 {
|
|
|
5509 Lisp_Object value = external_plist_get (extent_plist_addr (e),
|
|
|
5510 property, 0, ERROR_ME);
|
|
|
5511 return UNBOUNDP (value) ? default_ : value;
|
|
|
5512 }
|
|
|
5513 }
|
|
|
5514
|
|
|
5515 DEFUN ("extent-properties", Fextent_properties, 1, 1, 0, /*
|
|
|
5516 Return a property list of the attributes of EXTENT.
|
|
|
5517 Do not modify this list; use `set-extent-property' instead.
|
|
|
5518 */
|
|
|
5519 (extent))
|
|
|
5520 {
|
|
|
5521 EXTENT e, anc;
|
|
|
5522 Lisp_Object result, face, anc_obj;
|
|
|
5523 glyph_layout layout;
|
|
|
5524
|
|
|
5525 CHECK_EXTENT (extent);
|
|
|
5526 e = XEXTENT (extent);
|
|
|
5527 if (!EXTENT_LIVE_P (e))
|
|
|
5528 return cons3 (Qdestroyed, Qt, Qnil);
|
|
|
5529
|
|
|
5530 anc = extent_ancestor (e);
|
|
|
5531 XSETEXTENT (anc_obj, anc);
|
|
|
5532
|
|
|
5533 /* For efficiency, use the ancestor for all properties except detached */
|
|
|
5534
|
|
|
5535 result = extent_plist_slot (anc);
|
|
|
5536
|
|
|
5537 if (!NILP (face = Fextent_face (anc_obj)))
|
|
|
5538 result = cons3 (Qface, face, result);
|
|
|
5539
|
|
|
5540 if (!NILP (face = Fextent_mouse_face (anc_obj)))
|
|
|
5541 result = cons3 (Qmouse_face, face, result);
|
|
|
5542
|
|
|
5543 if ((layout = (glyph_layout) extent_begin_glyph_layout (anc)) != GL_TEXT)
|
|
|
5544 {
|
|
|
5545 Lisp_Object sym = glyph_layout_to_symbol (layout);
|
|
|
5546 result = cons3 (Qglyph_layout, sym, result); /* compatibility */
|
|
|
5547 result = cons3 (Qbegin_glyph_layout, sym, result);
|
|
|
5548 }
|
|
|
5549
|
|
|
5550 if ((layout = (glyph_layout) extent_end_glyph_layout (anc)) != GL_TEXT)
|
|
|
5551 result = cons3 (Qend_glyph_layout, glyph_layout_to_symbol (layout), result);
|
|
|
5552
|
|
|
5553 if (!NILP (extent_end_glyph (anc)))
|
|
|
5554 result = cons3 (Qend_glyph, extent_end_glyph (anc), result);
|
|
|
5555
|
|
|
5556 if (!NILP (extent_begin_glyph (anc)))
|
|
|
5557 result = cons3 (Qbegin_glyph, extent_begin_glyph (anc), result);
|
|
|
5558
|
|
|
5559 if (extent_priority (anc) != 0)
|
|
|
5560 result = cons3 (Qpriority, make_int (extent_priority (anc)), result);
|
|
|
5561
|
|
|
5562 if (!NILP (extent_initial_redisplay_function (anc)))
|
|
|
5563 result = cons3 (Qinitial_redisplay_function,
|
|
|
5564 extent_initial_redisplay_function (anc), result);
|
|
|
5565
|
|
|
5566 if (!NILP (extent_before_change_functions (anc)))
|
|
|
5567 result = cons3 (Qbefore_change_functions,
|
|
|
5568 extent_before_change_functions (anc), result);
|
|
|
5569
|
|
|
5570 if (!NILP (extent_after_change_functions (anc)))
|
|
|
5571 result = cons3 (Qafter_change_functions,
|
|
|
5572 extent_after_change_functions (anc), result);
|
|
|
5573
|
|
|
5574 if (!NILP (extent_invisible (anc)))
|
|
|
5575 result = cons3 (Qinvisible, extent_invisible (anc), result);
|
|
|
5576
|
|
|
5577 if (!NILP (extent_read_only (anc)))
|
|
|
5578 result = cons3 (Qread_only, extent_read_only (anc), result);
|
|
|
5579
|
|
|
5580 if (extent_normal_field (anc, end_open))
|
|
|
5581 result = cons3 (Qend_open, Qt, result);
|
|
|
5582
|
|
|
5583 if (extent_normal_field (anc, start_open))
|
|
|
5584 result = cons3 (Qstart_open, Qt, result);
|
|
|
5585
|
|
|
5586 if (extent_normal_field (anc, detachable))
|
|
|
5587 result = cons3 (Qdetachable, Qt, result);
|
|
|
5588
|
|
|
5589 if (extent_normal_field (anc, duplicable))
|
|
|
5590 result = cons3 (Qduplicable, Qt, result);
|
|
|
5591
|
|
|
5592 if (extent_normal_field (anc, unique))
|
|
|
5593 result = cons3 (Qunique, Qt, result);
|
|
|
5594
|
|
|
5595 /* detached is not an inherited property */
|
|
|
5596 if (extent_detached_p (e))
|
|
|
5597 result = cons3 (Qdetached, Qt, result);
|
|
|
5598
|
|
|
5599 return result;
|
|
|
5600 }
|
|
|
5601
|
|
|
5602
|
|
|
5603 /************************************************************************/
|
|
|
5604 /* highlighting */
|
|
|
5605 /************************************************************************/
|
|
|
5606
|
|
|
5607 /* The display code looks into the Vlast_highlighted_extent variable to
|
|
|
5608 correctly display highlighted extents. This updates that variable,
|
|
|
5609 and marks the appropriate buffers as needing some redisplay.
|
|
|
5610 */
|
|
|
5611 static void
|
|
|
5612 do_highlight (Lisp_Object extent_obj, int highlight_p)
|
|
|
5613 {
|
|
|
5614 if (( highlight_p && (EQ (Vlast_highlighted_extent, extent_obj))) ||
|
|
|
5615 (!highlight_p && (EQ (Vlast_highlighted_extent, Qnil))))
|
|
|
5616 return;
|
|
|
5617 if (EXTENTP (Vlast_highlighted_extent) &&
|
|
|
5618 EXTENT_LIVE_P (XEXTENT (Vlast_highlighted_extent)))
|
|
|
5619 {
|
|
|
5620 /* do not recurse on descendants. Only one extent is highlighted
|
|
|
5621 at a time. */
|
|
|
5622 extent_changed_for_redisplay (XEXTENT (Vlast_highlighted_extent), 0, 0);
|
|
|
5623 }
|
|
|
5624 Vlast_highlighted_extent = Qnil;
|
|
|
5625 if (!NILP (extent_obj)
|
|
|
5626 && BUFFERP (extent_object (XEXTENT (extent_obj)))
|
|
|
5627 && highlight_p)
|
|
|
5628 {
|
|
|
5629 extent_changed_for_redisplay (XEXTENT (extent_obj), 0, 0);
|
|
|
5630 Vlast_highlighted_extent = extent_obj;
|
|
|
5631 }
|
|
|
5632 }
|
|
|
5633
|
|
|
5634 DEFUN ("force-highlight-extent", Fforce_highlight_extent, 1, 2, 0, /*
|
|
|
5635 Highlight or unhighlight the given extent.
|
|
|
5636 If the second arg is non-nil, it will be highlighted, else dehighlighted.
|
|
|
5637 This is the same as `highlight-extent', except that it will work even
|
|
|
5638 on extents without the `mouse-face' property.
|
|
|
5639 */
|
|
|
5640 (extent, highlight_p))
|
|
|
5641 {
|
|
|
5642 if (NILP (extent))
|
|
|
5643 highlight_p = Qnil;
|
|
|
5644 else
|
|
|
5645 XSETEXTENT (extent, decode_extent (extent, DE_MUST_BE_ATTACHED));
|
|
|
5646 do_highlight (extent, !NILP (highlight_p));
|
|
|
5647 return Qnil;
|
|
|
5648 }
|
|
|
5649
|
|
|
5650 DEFUN ("highlight-extent", Fhighlight_extent, 1, 2, 0, /*
|
|
|
5651 Highlight EXTENT, if it is highlightable.
|
|
|
5652 \(that is, if it has the `mouse-face' property).
|
|
|
5653 If the second arg is non-nil, it will be highlighted, else dehighlighted.
|
|
|
5654 Highlighted extents are displayed as if they were merged with the face
|
|
|
5655 or faces specified by the `mouse-face' property.
|
|
|
5656 */
|
|
|
5657 (extent, highlight_p))
|
|
|
5658 {
|
|
|
5659 if (EXTENTP (extent) && NILP (extent_mouse_face (XEXTENT (extent))))
|
|
|
5660 return Qnil;
|
|
|
5661 else
|
|
|
5662 return Fforce_highlight_extent (extent, highlight_p);
|
|
|
5663 }
|
|
|
5664
|
|
|
5665
|
|
|
5666 /************************************************************************/
|
|
|
5667 /* strings and extents */
|
|
|
5668 /************************************************************************/
|
|
|
5669
|
|
|
5670 /* copy/paste hooks */
|
|
|
5671
|
|
|
5672 static int
|
|
665
|
5673 run_extent_copy_paste_internal (EXTENT e, Charbpos from, Charbpos to,
|
|
428
|
5674 Lisp_Object object,
|
|
|
5675 Lisp_Object prop)
|
|
|
5676 {
|
|
|
5677 /* This function can GC */
|
|
|
5678 Lisp_Object extent;
|
|
|
5679 Lisp_Object copy_fn;
|
|
|
5680 XSETEXTENT (extent, e);
|
|
|
5681 copy_fn = Fextent_property (extent, prop, Qnil);
|
|
|
5682 if (!NILP (copy_fn))
|
|
|
5683 {
|
|
|
5684 Lisp_Object flag;
|
|
|
5685 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
5686 GCPRO3 (extent, copy_fn, object);
|
|
|
5687 if (BUFFERP (object))
|
|
|
5688 flag = call3_in_buffer (XBUFFER (object), copy_fn, extent,
|
|
|
5689 make_int (from), make_int (to));
|
|
|
5690 else
|
|
|
5691 flag = call3 (copy_fn, extent, make_int (from), make_int (to));
|
|
|
5692 UNGCPRO;
|
|
|
5693 if (NILP (flag) || !EXTENT_LIVE_P (XEXTENT (extent)))
|
|
|
5694 return 0;
|
|
|
5695 }
|
|
|
5696 return 1;
|
|
|
5697 }
|
|
|
5698
|
|
|
5699 static int
|
|
665
|
5700 run_extent_copy_function (EXTENT e, Bytebpos from, Bytebpos to)
|
|
428
|
5701 {
|
|
|
5702 Lisp_Object object = extent_object (e);
|
|
|
5703 /* This function can GC */
|
|
|
5704 return run_extent_copy_paste_internal
|
|
665
|
5705 (e, buffer_or_string_bytebpos_to_charbpos (object, from),
|
|
|
5706 buffer_or_string_bytebpos_to_charbpos (object, to), object,
|
|
428
|
5707 Qcopy_function);
|
|
|
5708 }
|
|
|
5709
|
|
|
5710 static int
|
|
665
|
5711 run_extent_paste_function (EXTENT e, Bytebpos from, Bytebpos to,
|
|
428
|
5712 Lisp_Object object)
|
|
|
5713 {
|
|
|
5714 /* This function can GC */
|
|
|
5715 return run_extent_copy_paste_internal
|
|
665
|
5716 (e, buffer_or_string_bytebpos_to_charbpos (object, from),
|
|
|
5717 buffer_or_string_bytebpos_to_charbpos (object, to), object,
|
|
428
|
5718 Qpaste_function);
|
|
|
5719 }
|
|
|
5720
|
|
|
5721 static void
|
|
665
|
5722 update_extent (EXTENT extent, Bytebpos from, Bytebpos to)
|
|
428
|
5723 {
|
|
|
5724 set_extent_endpoints (extent, from, to, Qnil);
|
|
|
5725 }
|
|
|
5726
|
|
|
5727 /* Insert an extent, usually from the dup_list of a string which
|
|
|
5728 has just been inserted.
|
|
|
5729 This code does not handle the case of undo.
|
|
|
5730 */
|
|
|
5731 static Lisp_Object
|
|
665
|
5732 insert_extent (EXTENT extent, Bytebpos new_start, Bytebpos new_end,
|
|
428
|
5733 Lisp_Object object, int run_hooks)
|
|
|
5734 {
|
|
|
5735 /* This function can GC */
|
|
|
5736 Lisp_Object tmp;
|
|
|
5737
|
|
|
5738 if (!EQ (extent_object (extent), object))
|
|
|
5739 goto copy_it;
|
|
|
5740
|
|
|
5741 if (extent_detached_p (extent))
|
|
|
5742 {
|
|
|
5743 if (run_hooks &&
|
|
|
5744 !run_extent_paste_function (extent, new_start, new_end, object))
|
|
|
5745 /* The paste-function said don't re-attach this extent here. */
|
|
|
5746 return Qnil;
|
|
|
5747 else
|
|
|
5748 update_extent (extent, new_start, new_end);
|
|
|
5749 }
|
|
|
5750 else
|
|
|
5751 {
|
|
665
|
5752 Bytebpos exstart = extent_endpoint_bytebpos (extent, 0);
|
|
|
5753 Bytebpos exend = extent_endpoint_bytebpos (extent, 1);
|
|
428
|
5754
|
|
|
5755 if (exend < new_start || exstart > new_end)
|
|
|
5756 goto copy_it;
|
|
|
5757 else
|
|
|
5758 {
|
|
|
5759 new_start = min (exstart, new_start);
|
|
|
5760 new_end = max (exend, new_end);
|
|
|
5761 if (exstart != new_start || exend != new_end)
|
|
|
5762 update_extent (extent, new_start, new_end);
|
|
|
5763 }
|
|
|
5764 }
|
|
|
5765
|
|
|
5766 XSETEXTENT (tmp, extent);
|
|
|
5767 return tmp;
|
|
|
5768
|
|
|
5769 copy_it:
|
|
|
5770 if (run_hooks &&
|
|
|
5771 !run_extent_paste_function (extent, new_start, new_end, object))
|
|
|
5772 /* The paste-function said don't attach a copy of the extent here. */
|
|
|
5773 return Qnil;
|
|
|
5774 else
|
|
|
5775 {
|
|
|
5776 XSETEXTENT (tmp, copy_extent (extent, new_start, new_end, object));
|
|
|
5777 return tmp;
|
|
|
5778 }
|
|
|
5779 }
|
|
|
5780
|
|
|
5781 DEFUN ("insert-extent", Finsert_extent, 1, 5, 0, /*
|
|
|
5782 Insert EXTENT from START to END in BUFFER-OR-STRING.
|
|
|
5783 BUFFER-OR-STRING defaults to the current buffer if omitted.
|
|
|
5784 This operation does not insert any characters,
|
|
|
5785 but otherwise acts as if there were a replicating extent whose
|
|
|
5786 parent is EXTENT in some string that was just inserted.
|
|
|
5787 Returns the newly-inserted extent.
|
|
|
5788 The fourth arg, NO-HOOKS, can be used to inhibit the running of the
|
|
|
5789 extent's `paste-function' property if it has one.
|
|
|
5790 See documentation on `detach-extent' for a discussion of undo recording.
|
|
|
5791 */
|
|
|
5792 (extent, start, end, no_hooks, buffer_or_string))
|
|
|
5793 {
|
|
|
5794 EXTENT ext = decode_extent (extent, 0);
|
|
|
5795 Lisp_Object copy;
|
|
665
|
5796 Bytebpos s, e;
|
|
428
|
5797
|
|
|
5798 buffer_or_string = decode_buffer_or_string (buffer_or_string);
|
|
|
5799 get_buffer_or_string_range_byte (buffer_or_string, start, end, &s, &e,
|
|
|
5800 GB_ALLOW_PAST_ACCESSIBLE);
|
|
|
5801
|
|
|
5802 copy = insert_extent (ext, s, e, buffer_or_string, NILP (no_hooks));
|
|
|
5803 if (EXTENTP (copy))
|
|
|
5804 {
|
|
|
5805 if (extent_duplicable_p (XEXTENT (copy)))
|
|
|
5806 record_extent (copy, 1);
|
|
|
5807 }
|
|
|
5808 return copy;
|
|
|
5809 }
|
|
|
5810
|
|
|
5811
|
|
|
5812 /* adding buffer extents to a string */
|
|
|
5813
|
|
|
5814 struct add_string_extents_arg
|
|
|
5815 {
|
|
665
|
5816 Bytebpos from;
|
|
428
|
5817 Bytecount length;
|
|
|
5818 Lisp_Object string;
|
|
|
5819 };
|
|
|
5820
|
|
|
5821 static int
|
|
|
5822 add_string_extents_mapper (EXTENT extent, void *arg)
|
|
|
5823 {
|
|
|
5824 /* This function can GC */
|
|
|
5825 struct add_string_extents_arg *closure =
|
|
|
5826 (struct add_string_extents_arg *) arg;
|
|
665
|
5827 Bytecount start = extent_endpoint_bytebpos (extent, 0) - closure->from;
|
|
|
5828 Bytecount end = extent_endpoint_bytebpos (extent, 1) - closure->from;
|
|
428
|
5829
|
|
|
5830 if (extent_duplicable_p (extent))
|
|
|
5831 {
|
|
|
5832 start = max (start, 0);
|
|
|
5833 end = min (end, closure->length);
|
|
|
5834
|
|
|
5835 /* Run the copy-function to give an extent the option of
|
|
|
5836 not being copied into the string (or kill ring).
|
|
|
5837 */
|
|
|
5838 if (extent_duplicable_p (extent) &&
|
|
|
5839 !run_extent_copy_function (extent, start + closure->from,
|
|
|
5840 end + closure->from))
|
|
|
5841 return 0;
|
|
|
5842 copy_extent (extent, start, end, closure->string);
|
|
|
5843 }
|
|
|
5844
|
|
|
5845 return 0;
|
|
|
5846 }
|
|
|
5847
|
|
|
5848 /* Add the extents in buffer BUF from OPOINT to OPOINT+LENGTH to
|
|
|
5849 the string STRING. */
|
|
|
5850 void
|
|
665
|
5851 add_string_extents (Lisp_Object string, struct buffer *buf, Bytebpos opoint,
|
|
428
|
5852 Bytecount length)
|
|
|
5853 {
|
|
|
5854 /* This function can GC */
|
|
|
5855 struct add_string_extents_arg closure;
|
|
|
5856 struct gcpro gcpro1, gcpro2;
|
|
|
5857 Lisp_Object buffer;
|
|
|
5858
|
|
|
5859 closure.from = opoint;
|
|
|
5860 closure.length = length;
|
|
|
5861 closure.string = string;
|
|
|
5862 buffer = make_buffer (buf);
|
|
|
5863 GCPRO2 (buffer, string);
|
|
665
|
5864 map_extents_bytebpos (opoint, opoint + length, add_string_extents_mapper,
|
|
428
|
5865 (void *) &closure, buffer, 0,
|
|
|
5866 /* ignore extents that just abut the region */
|
|
|
5867 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN |
|
|
|
5868 /* we are calling E-Lisp (the extent's copy function)
|
|
|
5869 so anything might happen */
|
|
|
5870 ME_MIGHT_CALL_ELISP);
|
|
|
5871 UNGCPRO;
|
|
|
5872 }
|
|
|
5873
|
|
|
5874 struct splice_in_string_extents_arg
|
|
|
5875 {
|
|
|
5876 Bytecount pos;
|
|
|
5877 Bytecount length;
|
|
665
|
5878 Bytebpos opoint;
|
|
428
|
5879 Lisp_Object buffer;
|
|
|
5880 };
|
|
|
5881
|
|
|
5882 static int
|
|
|
5883 splice_in_string_extents_mapper (EXTENT extent, void *arg)
|
|
|
5884 {
|
|
|
5885 /* This function can GC */
|
|
|
5886 struct splice_in_string_extents_arg *closure =
|
|
|
5887 (struct splice_in_string_extents_arg *) arg;
|
|
|
5888 /* BASE_START and BASE_END are the limits in the buffer of the string
|
|
|
5889 that was just inserted.
|
|
|
5890
|
|
|
5891 NEW_START and NEW_END are the prospective buffer positions of the
|
|
|
5892 extent that is going into the buffer. */
|
|
665
|
5893 Bytebpos base_start = closure->opoint;
|
|
|
5894 Bytebpos base_end = base_start + closure->length;
|
|
|
5895 Bytebpos new_start = (base_start + extent_endpoint_bytebpos (extent, 0) -
|
|
428
|
5896 closure->pos);
|
|
665
|
5897 Bytebpos new_end = (base_start + extent_endpoint_bytebpos (extent, 1) -
|
|
428
|
5898 closure->pos);
|
|
|
5899
|
|
|
5900 if (new_start < base_start)
|
|
|
5901 new_start = base_start;
|
|
|
5902 if (new_end > base_end)
|
|
|
5903 new_end = base_end;
|
|
|
5904 if (new_end <= new_start)
|
|
|
5905 return 0;
|
|
|
5906
|
|
|
5907 if (!extent_duplicable_p (extent))
|
|
|
5908 return 0;
|
|
|
5909
|
|
|
5910 if (!inside_undo &&
|
|
|
5911 !run_extent_paste_function (extent, new_start, new_end,
|
|
|
5912 closure->buffer))
|
|
|
5913 return 0;
|
|
|
5914 copy_extent (extent, new_start, new_end, closure->buffer);
|
|
|
5915
|
|
|
5916 return 0;
|
|
|
5917 }
|
|
|
5918
|
|
|
5919 /* We have just inserted a section of STRING (starting at POS, of
|
|
|
5920 length LENGTH) into buffer BUF at OPOINT. Do whatever is necessary
|
|
|
5921 to get the string's extents into the buffer. */
|
|
|
5922
|
|
|
5923 void
|
|
|
5924 splice_in_string_extents (Lisp_Object string, struct buffer *buf,
|
|
665
|
5925 Bytebpos opoint, Bytecount length, Bytecount pos)
|
|
428
|
5926 {
|
|
|
5927 struct splice_in_string_extents_arg closure;
|
|
|
5928 struct gcpro gcpro1, gcpro2;
|
|
|
5929 Lisp_Object buffer;
|
|
|
5930
|
|
|
5931 buffer = make_buffer (buf);
|
|
|
5932 closure.opoint = opoint;
|
|
|
5933 closure.pos = pos;
|
|
|
5934 closure.length = length;
|
|
|
5935 closure.buffer = buffer;
|
|
|
5936 GCPRO2 (buffer, string);
|
|
665
|
5937 map_extents_bytebpos (pos, pos + length,
|
|
428
|
5938 splice_in_string_extents_mapper,
|
|
|
5939 (void *) &closure, string, 0,
|
|
|
5940 /* ignore extents that just abut the region */
|
|
|
5941 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN |
|
|
|
5942 /* we are calling E-Lisp (the extent's copy function)
|
|
|
5943 so anything might happen */
|
|
|
5944 ME_MIGHT_CALL_ELISP);
|
|
|
5945 UNGCPRO;
|
|
|
5946 }
|
|
|
5947
|
|
|
5948 struct copy_string_extents_arg
|
|
|
5949 {
|
|
|
5950 Bytecount new_pos;
|
|
|
5951 Bytecount old_pos;
|
|
|
5952 Bytecount length;
|
|
|
5953 Lisp_Object new_string;
|
|
|
5954 };
|
|
|
5955
|
|
|
5956 struct copy_string_extents_1_arg
|
|
|
5957 {
|
|
|
5958 Lisp_Object parent_in_question;
|
|
|
5959 EXTENT found_extent;
|
|
|
5960 };
|
|
|
5961
|
|
|
5962 static int
|
|
|
5963 copy_string_extents_mapper (EXTENT extent, void *arg)
|
|
|
5964 {
|
|
|
5965 struct copy_string_extents_arg *closure =
|
|
|
5966 (struct copy_string_extents_arg *) arg;
|
|
|
5967 Bytecount old_start, old_end, new_start, new_end;
|
|
|
5968
|
|
665
|
5969 old_start = extent_endpoint_bytebpos (extent, 0);
|
|
|
5970 old_end = extent_endpoint_bytebpos (extent, 1);
|
|
428
|
5971
|
|
|
5972 old_start = max (closure->old_pos, old_start);
|
|
|
5973 old_end = min (closure->old_pos + closure->length, old_end);
|
|
|
5974
|
|
|
5975 if (old_start >= old_end)
|
|
|
5976 return 0;
|
|
|
5977
|
|
|
5978 new_start = old_start + closure->new_pos - closure->old_pos;
|
|
|
5979 new_end = old_end + closure->new_pos - closure->old_pos;
|
|
|
5980
|
|
|
5981 copy_extent (extent, new_start, new_end, closure->new_string);
|
|
|
5982 return 0;
|
|
|
5983 }
|
|
|
5984
|
|
|
5985 /* The string NEW_STRING was partially constructed from OLD_STRING.
|
|
|
5986 In particular, the section of length LEN starting at NEW_POS in
|
|
|
5987 NEW_STRING came from the section of the same length starting at
|
|
|
5988 OLD_POS in OLD_STRING. Copy the extents as appropriate. */
|
|
|
5989
|
|
|
5990 void
|
|
|
5991 copy_string_extents (Lisp_Object new_string, Lisp_Object old_string,
|
|
|
5992 Bytecount new_pos, Bytecount old_pos,
|
|
|
5993 Bytecount length)
|
|
|
5994 {
|
|
|
5995 struct copy_string_extents_arg closure;
|
|
|
5996 struct gcpro gcpro1, gcpro2;
|
|
|
5997
|
|
|
5998 closure.new_pos = new_pos;
|
|
|
5999 closure.old_pos = old_pos;
|
|
|
6000 closure.new_string = new_string;
|
|
|
6001 closure.length = length;
|
|
|
6002 GCPRO2 (new_string, old_string);
|
|
665
|
6003 map_extents_bytebpos (old_pos, old_pos + length,
|
|
428
|
6004 copy_string_extents_mapper,
|
|
|
6005 (void *) &closure, old_string, 0,
|
|
|
6006 /* ignore extents that just abut the region */
|
|
|
6007 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN |
|
|
|
6008 /* we are calling E-Lisp (the extent's copy function)
|
|
|
6009 so anything might happen */
|
|
|
6010 ME_MIGHT_CALL_ELISP);
|
|
|
6011 UNGCPRO;
|
|
|
6012 }
|
|
|
6013
|
|
|
6014 /* Checklist for sanity checking:
|
|
|
6015 - {kill, yank, copy} at {open, closed} {start, end} of {writable, read-only} extent
|
|
|
6016 - {kill, copy} & yank {once, repeatedly} duplicable extent in {same, different} buffer
|
|
|
6017 */
|
|
|
6018
|
|
|
6019
|
|
|
6020 /************************************************************************/
|
|
|
6021 /* text properties */
|
|
|
6022 /************************************************************************/
|
|
|
6023
|
|
|
6024 /* Text properties
|
|
|
6025 Originally this stuff was implemented in lisp (all of the functionality
|
|
|
6026 exists to make that possible) but speed was a problem.
|
|
|
6027 */
|
|
|
6028
|
|
|
6029 Lisp_Object Qtext_prop;
|
|
|
6030 Lisp_Object Qtext_prop_extent_paste_function;
|
|
|
6031
|
|
|
6032 static Lisp_Object
|
|
665
|
6033 get_text_property_bytebpos (Bytebpos position, Lisp_Object prop,
|
|
428
|
6034 Lisp_Object object, enum extent_at_flag fl,
|
|
|
6035 int text_props_only)
|
|
|
6036 {
|
|
|
6037 Lisp_Object extent;
|
|
|
6038
|
|
|
6039 /* text_props_only specifies whether we only consider text-property
|
|
|
6040 extents (those with the 'text-prop property set) or all extents. */
|
|
|
6041 if (!text_props_only)
|
|
665
|
6042 extent = extent_at_bytebpos (position, object, prop, 0, fl, 0);
|
|
428
|
6043 else
|
|
|
6044 {
|
|
|
6045 EXTENT prior = 0;
|
|
|
6046 while (1)
|
|
|
6047 {
|
|
665
|
6048 extent = extent_at_bytebpos (position, object, Qtext_prop, prior,
|
|
442
|
6049 fl, 0);
|
|
428
|
6050 if (NILP (extent))
|
|
|
6051 return Qnil;
|
|
|
6052 if (EQ (prop, Fextent_property (extent, Qtext_prop, Qnil)))
|
|
|
6053 break;
|
|
|
6054 prior = XEXTENT (extent);
|
|
|
6055 }
|
|
|
6056 }
|
|
|
6057
|
|
|
6058 if (!NILP (extent))
|
|
|
6059 return Fextent_property (extent, prop, Qnil);
|
|
|
6060 if (!NILP (Vdefault_text_properties))
|
|
|
6061 return Fplist_get (Vdefault_text_properties, prop, Qnil);
|
|
|
6062 return Qnil;
|
|
|
6063 }
|
|
|
6064
|
|
|
6065 static Lisp_Object
|
|
|
6066 get_text_property_1 (Lisp_Object pos, Lisp_Object prop, Lisp_Object object,
|
|
|
6067 Lisp_Object at_flag, int text_props_only)
|
|
|
6068 {
|
|
665
|
6069 Bytebpos position;
|
|
428
|
6070 int invert = 0;
|
|
|
6071
|
|
|
6072 object = decode_buffer_or_string (object);
|
|
|
6073 position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD);
|
|
|
6074
|
|
|
6075 /* We canonicalize the start/end-open/closed properties to the
|
|
|
6076 non-default version -- "adding" the default property really
|
|
|
6077 needs to remove the non-default one. See below for more
|
|
|
6078 on this. */
|
|
|
6079 if (EQ (prop, Qstart_closed))
|
|
|
6080 {
|
|
|
6081 prop = Qstart_open;
|
|
|
6082 invert = 1;
|
|
|
6083 }
|
|
|
6084
|
|
|
6085 if (EQ (prop, Qend_open))
|
|
|
6086 {
|
|
|
6087 prop = Qend_closed;
|
|
|
6088 invert = 1;
|
|
|
6089 }
|
|
|
6090
|
|
|
6091 {
|
|
|
6092 Lisp_Object val =
|
|
665
|
6093 get_text_property_bytebpos (position, prop, object,
|
|
428
|
6094 decode_extent_at_flag (at_flag),
|
|
|
6095 text_props_only);
|
|
|
6096 if (invert)
|
|
|
6097 val = NILP (val) ? Qt : Qnil;
|
|
|
6098 return val;
|
|
|
6099 }
|
|
|
6100 }
|
|
|
6101
|
|
|
6102 DEFUN ("get-text-property", Fget_text_property, 2, 4, 0, /*
|
|
|
6103 Return the value of the PROP property at the given position.
|
|
|
6104 Optional arg OBJECT specifies the buffer or string to look in, and
|
|
|
6105 defaults to the current buffer.
|
|
|
6106 Optional arg AT-FLAG controls what it means for a property to be "at"
|
|
|
6107 a position, and has the same meaning as in `extent-at'.
|
|
|
6108 This examines only those properties added with `put-text-property'.
|
|
|
6109 See also `get-char-property'.
|
|
|
6110 */
|
|
|
6111 (pos, prop, object, at_flag))
|
|
|
6112 {
|
|
|
6113 return get_text_property_1 (pos, prop, object, at_flag, 1);
|
|
|
6114 }
|
|
|
6115
|
|
|
6116 DEFUN ("get-char-property", Fget_char_property, 2, 4, 0, /*
|
|
|
6117 Return the value of the PROP property at the given position.
|
|
|
6118 Optional arg OBJECT specifies the buffer or string to look in, and
|
|
|
6119 defaults to the current buffer.
|
|
|
6120 Optional arg AT-FLAG controls what it means for a property to be "at"
|
|
|
6121 a position, and has the same meaning as in `extent-at'.
|
|
|
6122 This examines properties on all extents.
|
|
|
6123 See also `get-text-property'.
|
|
|
6124 */
|
|
|
6125 (pos, prop, object, at_flag))
|
|
|
6126 {
|
|
|
6127 return get_text_property_1 (pos, prop, object, at_flag, 0);
|
|
|
6128 }
|
|
|
6129
|
|
|
6130 /* About start/end-open/closed:
|
|
|
6131
|
|
|
6132 These properties have to be handled specially because of their
|
|
|
6133 strange behavior. If I put the "start-open" property on a region,
|
|
|
6134 then *all* text-property extents in the region have to have their
|
|
|
6135 start be open. This is unlike all other properties, which don't
|
|
|
6136 affect the extents of text properties other than their own.
|
|
|
6137
|
|
|
6138 So:
|
|
|
6139
|
|
|
6140 1) We have to map start-closed to (not start-open) and end-open
|
|
|
6141 to (not end-closed) -- i.e. adding the default is really the
|
|
|
6142 same as remove the non-default property. It won't work, for
|
|
|
6143 example, to have both "start-open" and "start-closed" on
|
|
|
6144 the same region.
|
|
|
6145 2) Whenever we add one of these properties, we go through all
|
|
|
6146 text-property extents in the region and set the appropriate
|
|
|
6147 open/closedness on them.
|
|
|
6148 3) Whenever we change a text-property extent for a property,
|
|
|
6149 we have to make sure we set the open/closedness properly.
|
|
|
6150
|
|
|
6151 (2) and (3) together rely on, and maintain, the invariant
|
|
|
6152 that the open/closedness of text-property extents is correct
|
|
|
6153 at the beginning and end of each operation.
|
|
|
6154 */
|
|
|
6155
|
|
|
6156 struct put_text_prop_arg
|
|
|
6157 {
|
|
|
6158 Lisp_Object prop, value; /* The property and value we are storing */
|
|
665
|
6159 Bytebpos start, end; /* The region into which we are storing it */
|
|
428
|
6160 Lisp_Object object;
|
|
|
6161 Lisp_Object the_extent; /* Our chosen extent; this is used for
|
|
|
6162 communication between subsequent passes. */
|
|
|
6163 int changed_p; /* Output: whether we have modified anything */
|
|
|
6164 };
|
|
|
6165
|
|
|
6166 static int
|
|
|
6167 put_text_prop_mapper (EXTENT e, void *arg)
|
|
|
6168 {
|
|
|
6169 struct put_text_prop_arg *closure = (struct put_text_prop_arg *) arg;
|
|
|
6170
|
|
|
6171 Lisp_Object object = closure->object;
|
|
|
6172 Lisp_Object value = closure->value;
|
|
665
|
6173 Bytebpos e_start, e_end;
|
|
|
6174 Bytebpos start = closure->start;
|
|
|
6175 Bytebpos end = closure->end;
|
|
428
|
6176 Lisp_Object extent, e_val;
|
|
|
6177 int is_eq;
|
|
|
6178
|
|
|
6179 XSETEXTENT (extent, e);
|
|
|
6180
|
|
|
6181 /* Note: in some cases when the property itself is 'start-open
|
|
|
6182 or 'end-closed, the checks to set the openness may do a bit
|
|
|
6183 of extra work; but it won't hurt because we then fix up the
|
|
|
6184 openness later on in put_text_prop_openness_mapper(). */
|
|
|
6185 if (!EQ (Fextent_property (extent, Qtext_prop, Qnil), closure->prop))
|
|
|
6186 /* It's not for this property; do nothing. */
|
|
|
6187 return 0;
|
|
|
6188
|
|
665
|
6189 e_start = extent_endpoint_bytebpos (e, 0);
|
|
|
6190 e_end = extent_endpoint_bytebpos (e, 1);
|
|
428
|
6191 e_val = Fextent_property (extent, closure->prop, Qnil);
|
|
|
6192 is_eq = EQ (value, e_val);
|
|
|
6193
|
|
|
6194 if (!NILP (value) && NILP (closure->the_extent) && is_eq)
|
|
|
6195 {
|
|
|
6196 /* We want there to be an extent here at the end, and we haven't picked
|
|
|
6197 one yet, so use this one. Extend it as necessary. We only reuse an
|
|
|
6198 extent which has an EQ value for the prop in question to avoid
|
|
|
6199 side-effecting the kill ring (that is, we never change the property
|
|
|
6200 on an extent after it has been created.)
|
|
|
6201 */
|
|
|
6202 if (e_start != start || e_end != end)
|
|
|
6203 {
|
|
665
|
6204 Bytebpos new_start = min (e_start, start);
|
|
|
6205 Bytebpos new_end = max (e_end, end);
|
|
428
|
6206 set_extent_endpoints (e, new_start, new_end, Qnil);
|
|
|
6207 /* If we changed the endpoint, then we need to set its
|
|
|
6208 openness. */
|
|
|
6209 set_extent_openness (e, new_start != e_start
|
|
665
|
6210 ? !NILP (get_text_property_bytebpos
|
|
428
|
6211 (start, Qstart_open, object,
|
|
|
6212 EXTENT_AT_AFTER, 1)) : -1,
|
|
|
6213 new_end != e_end
|
|
665
|
6214 ? NILP (get_text_property_bytebpos
|
|
428
|
6215 (end - 1, Qend_closed, object,
|
|
|
6216 EXTENT_AT_AFTER, 1))
|
|
|
6217 : -1);
|
|
|
6218 closure->changed_p = 1;
|
|
|
6219 }
|
|
|
6220 closure->the_extent = extent;
|
|
|
6221 }
|
|
|
6222
|
|
|
6223 /* Even if we're adding a prop, at this point, we want all other extents of
|
|
|
6224 this prop to go away (as now they overlap). So the theory here is that,
|
|
|
6225 when we are adding a prop to a region that has multiple (disjoint)
|
|
|
6226 occurrences of that prop in it already, we pick one of those and extend
|
|
|
6227 it, and remove the others.
|
|
|
6228 */
|
|
|
6229
|
|
|
6230 else if (EQ (extent, closure->the_extent))
|
|
|
6231 {
|
|
|
6232 /* just in case map-extents hits it again (does that happen?) */
|
|
|
6233 ;
|
|
|
6234 }
|
|
|
6235 else if (e_start >= start && e_end <= end)
|
|
|
6236 {
|
|
|
6237 /* Extent is contained in region; remove it. Don't destroy or modify
|
|
|
6238 it, because we don't want to change the attributes pointed to by the
|
|
|
6239 duplicates in the kill ring.
|
|
|
6240 */
|
|
|
6241 extent_detach (e);
|
|
|
6242 closure->changed_p = 1;
|
|
|
6243 }
|
|
|
6244 else if (!NILP (closure->the_extent) &&
|
|
|
6245 is_eq &&
|
|
|
6246 e_start <= end &&
|
|
|
6247 e_end >= start)
|
|
|
6248 {
|
|
|
6249 EXTENT te = XEXTENT (closure->the_extent);
|
|
|
6250 /* This extent overlaps, and has the same prop/value as the extent we've
|
|
|
6251 decided to reuse, so we can remove this existing extent as well (the
|
|
|
6252 whole thing, even the part outside of the region) and extend
|
|
|
6253 the-extent to cover it, resulting in the minimum number of extents in
|
|
|
6254 the buffer.
|
|
|
6255 */
|
|
665
|
6256 Bytebpos the_start = extent_endpoint_bytebpos (te, 0);
|
|
|
6257 Bytebpos the_end = extent_endpoint_bytebpos (te, 1);
|
|
428
|
6258 if (e_start != the_start && /* note AND not OR -- hmm, why is this
|
|
|
6259 the case? I think it's because the
|
|
|
6260 assumption that the text-property
|
|
|
6261 extents don't overlap makes it
|
|
|
6262 OK; changing it to an OR would
|
|
|
6263 result in changed_p sometimes getting
|
|
|
6264 falsely marked. Is this bad? */
|
|
|
6265 e_end != the_end)
|
|
|
6266 {
|
|
665
|
6267 Bytebpos new_start = min (e_start, the_start);
|
|
|
6268 Bytebpos new_end = max (e_end, the_end);
|
|
428
|
6269 set_extent_endpoints (te, new_start, new_end, Qnil);
|
|
|
6270 /* If we changed the endpoint, then we need to set its
|
|
|
6271 openness. We are setting the endpoint to be the same as
|
|
|
6272 that of the extent we're about to remove, and we assume
|
|
|
6273 (the invariant mentioned above) that extent has the
|
|
|
6274 proper endpoint setting, so we just use it. */
|
|
|
6275 set_extent_openness (te, new_start != e_start ?
|
|
|
6276 (int) extent_start_open_p (e) : -1,
|
|
|
6277 new_end != e_end ?
|
|
|
6278 (int) extent_end_open_p (e) : -1);
|
|
|
6279 closure->changed_p = 1;
|
|
|
6280 }
|
|
|
6281 extent_detach (e);
|
|
|
6282 }
|
|
|
6283 else if (e_end <= end)
|
|
|
6284 {
|
|
|
6285 /* Extent begins before start but ends before end, so we can just
|
|
|
6286 decrease its end position.
|
|
|
6287 */
|
|
|
6288 if (e_end != start)
|
|
|
6289 {
|
|
|
6290 set_extent_endpoints (e, e_start, start, Qnil);
|
|
665
|
6291 set_extent_openness (e, -1, NILP (get_text_property_bytebpos
|
|
428
|
6292 (start - 1, Qend_closed, object,
|
|
|
6293 EXTENT_AT_AFTER, 1)));
|
|
|
6294 closure->changed_p = 1;
|
|
|
6295 }
|
|
|
6296 }
|
|
|
6297 else if (e_start >= start)
|
|
|
6298 {
|
|
|
6299 /* Extent ends after end but begins after start, so we can just
|
|
|
6300 increase its start position.
|
|
|
6301 */
|
|
|
6302 if (e_start != end)
|
|
|
6303 {
|
|
|
6304 set_extent_endpoints (e, end, e_end, Qnil);
|
|
665
|
6305 set_extent_openness (e, !NILP (get_text_property_bytebpos
|
|
428
|
6306 (end, Qstart_open, object,
|
|
|
6307 EXTENT_AT_AFTER, 1)), -1);
|
|
|
6308 closure->changed_p = 1;
|
|
|
6309 }
|
|
|
6310 }
|
|
|
6311 else
|
|
|
6312 {
|
|
|
6313 /* Otherwise, `extent' straddles the region. We need to split it.
|
|
|
6314 */
|
|
|
6315 set_extent_endpoints (e, e_start, start, Qnil);
|
|
665
|
6316 set_extent_openness (e, -1, NILP (get_text_property_bytebpos
|
|
428
|
6317 (start - 1, Qend_closed, object,
|
|
|
6318 EXTENT_AT_AFTER, 1)));
|
|
|
6319 set_extent_openness (copy_extent (e, end, e_end, extent_object (e)),
|
|
665
|
6320 !NILP (get_text_property_bytebpos
|
|
428
|
6321 (end, Qstart_open, object,
|
|
|
6322 EXTENT_AT_AFTER, 1)), -1);
|
|
|
6323 closure->changed_p = 1;
|
|
|
6324 }
|
|
|
6325
|
|
|
6326 return 0; /* to continue mapping. */
|
|
|
6327 }
|
|
|
6328
|
|
|
6329 static int
|
|
|
6330 put_text_prop_openness_mapper (EXTENT e, void *arg)
|
|
|
6331 {
|
|
|
6332 struct put_text_prop_arg *closure = (struct put_text_prop_arg *) arg;
|
|
665
|
6333 Bytebpos e_start, e_end;
|
|
|
6334 Bytebpos start = closure->start;
|
|
|
6335 Bytebpos end = closure->end;
|
|
428
|
6336 Lisp_Object extent;
|
|
|
6337 XSETEXTENT (extent, e);
|
|
665
|
6338 e_start = extent_endpoint_bytebpos (e, 0);
|
|
|
6339 e_end = extent_endpoint_bytebpos (e, 1);
|
|
428
|
6340
|
|
|
6341 if (NILP (Fextent_property (extent, Qtext_prop, Qnil)))
|
|
|
6342 {
|
|
|
6343 /* It's not a text-property extent; do nothing. */
|
|
|
6344 ;
|
|
|
6345 }
|
|
|
6346 /* Note end conditions and NILP/!NILP's carefully. */
|
|
|
6347 else if (EQ (closure->prop, Qstart_open)
|
|
|
6348 && e_start >= start && e_start < end)
|
|
|
6349 set_extent_openness (e, !NILP (closure->value), -1);
|
|
|
6350 else if (EQ (closure->prop, Qend_closed)
|
|
|
6351 && e_end > start && e_end <= end)
|
|
|
6352 set_extent_openness (e, -1, NILP (closure->value));
|
|
|
6353
|
|
|
6354 return 0; /* to continue mapping. */
|
|
|
6355 }
|
|
|
6356
|
|
|
6357 static int
|
|
665
|
6358 put_text_prop (Bytebpos start, Bytebpos end, Lisp_Object object,
|
|
428
|
6359 Lisp_Object prop, Lisp_Object value,
|
|
|
6360 int duplicable_p)
|
|
|
6361 {
|
|
|
6362 /* This function can GC */
|
|
|
6363 struct put_text_prop_arg closure;
|
|
|
6364
|
|
|
6365 if (start == end) /* There are no characters in the region. */
|
|
|
6366 return 0;
|
|
|
6367
|
|
|
6368 /* convert to the non-default versions, since a nil property is
|
|
|
6369 the same as it not being present. */
|
|
|
6370 if (EQ (prop, Qstart_closed))
|
|
|
6371 {
|
|
|
6372 prop = Qstart_open;
|
|
|
6373 value = NILP (value) ? Qt : Qnil;
|
|
|
6374 }
|
|
|
6375 else if (EQ (prop, Qend_open))
|
|
|
6376 {
|
|
|
6377 prop = Qend_closed;
|
|
|
6378 value = NILP (value) ? Qt : Qnil;
|
|
|
6379 }
|
|
|
6380
|
|
|
6381 value = canonicalize_extent_property (prop, value);
|
|
|
6382
|
|
|
6383 closure.prop = prop;
|
|
|
6384 closure.value = value;
|
|
|
6385 closure.start = start;
|
|
|
6386 closure.end = end;
|
|
|
6387 closure.object = object;
|
|
|
6388 closure.changed_p = 0;
|
|
|
6389 closure.the_extent = Qnil;
|
|
|
6390
|
|
665
|
6391 map_extents_bytebpos (start, end,
|
|
428
|
6392 put_text_prop_mapper,
|
|
|
6393 (void *) &closure, object, 0,
|
|
|
6394 /* get all extents that abut the region */
|
|
|
6395 ME_ALL_EXTENTS_CLOSED | ME_END_CLOSED |
|
|
|
6396 /* it might QUIT or error if the user has
|
|
|
6397 fucked with the extent plist. */
|
|
|
6398 /* #### dmoore - I think this should include
|
|
|
6399 ME_MIGHT_MOVE_SOE, since the callback function
|
|
665
|
6400 might recurse back into map_extents_bytebpos. */
|
|
428
|
6401 ME_MIGHT_THROW |
|
|
|
6402 ME_MIGHT_MODIFY_EXTENTS);
|
|
|
6403
|
|
|
6404 /* If we made it through the loop without reusing an extent
|
|
|
6405 (and we want there to be one) make it now.
|
|
|
6406 */
|
|
|
6407 if (!NILP (value) && NILP (closure.the_extent))
|
|
|
6408 {
|
|
|
6409 Lisp_Object extent;
|
|
|
6410
|
|
|
6411 XSETEXTENT (extent, make_extent_internal (object, start, end));
|
|
|
6412 closure.changed_p = 1;
|
|
|
6413 Fset_extent_property (extent, Qtext_prop, prop);
|
|
|
6414 Fset_extent_property (extent, prop, value);
|
|
|
6415 if (duplicable_p)
|
|
|
6416 {
|
|
|
6417 extent_duplicable_p (XEXTENT (extent)) = 1;
|
|
|
6418 Fset_extent_property (extent, Qpaste_function,
|
|
|
6419 Qtext_prop_extent_paste_function);
|
|
|
6420 }
|
|
|
6421 set_extent_openness (XEXTENT (extent),
|
|
665
|
6422 !NILP (get_text_property_bytebpos
|
|
428
|
6423 (start, Qstart_open, object,
|
|
|
6424 EXTENT_AT_AFTER, 1)),
|
|
665
|
6425 NILP (get_text_property_bytebpos
|
|
428
|
6426 (end - 1, Qend_closed, object,
|
|
|
6427 EXTENT_AT_AFTER, 1)));
|
|
|
6428 }
|
|
|
6429
|
|
|
6430 if (EQ (prop, Qstart_open) || EQ (prop, Qend_closed))
|
|
|
6431 {
|
|
665
|
6432 map_extents_bytebpos (start, end,
|
|
428
|
6433 put_text_prop_openness_mapper,
|
|
|
6434 (void *) &closure, object, 0,
|
|
|
6435 /* get all extents that abut the region */
|
|
|
6436 ME_ALL_EXTENTS_CLOSED | ME_END_CLOSED |
|
|
|
6437 ME_MIGHT_MODIFY_EXTENTS);
|
|
|
6438 }
|
|
|
6439
|
|
|
6440 return closure.changed_p;
|
|
|
6441 }
|
|
|
6442
|
|
|
6443 DEFUN ("put-text-property", Fput_text_property, 4, 5, 0, /*
|
|
|
6444 Adds the given property/value to all characters in the specified region.
|
|
|
6445 The property is conceptually attached to the characters rather than the
|
|
|
6446 region. The properties are copied when the characters are copied/pasted.
|
|
|
6447 Fifth argument OBJECT is the buffer or string containing the text, and
|
|
|
6448 defaults to the current buffer.
|
|
|
6449 */
|
|
|
6450 (start, end, prop, value, object))
|
|
|
6451 {
|
|
|
6452 /* This function can GC */
|
|
665
|
6453 Bytebpos s, e;
|
|
428
|
6454
|
|
|
6455 object = decode_buffer_or_string (object);
|
|
|
6456 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
6457 put_text_prop (s, e, object, prop, value, 1);
|
|
|
6458 return prop;
|
|
|
6459 }
|
|
|
6460
|
|
|
6461 DEFUN ("put-nonduplicable-text-property", Fput_nonduplicable_text_property,
|
|
|
6462 4, 5, 0, /*
|
|
|
6463 Adds the given property/value to all characters in the specified region.
|
|
|
6464 The property is conceptually attached to the characters rather than the
|
|
|
6465 region, however the properties will not be copied when the characters
|
|
|
6466 are copied.
|
|
|
6467 Fifth argument OBJECT is the buffer or string containing the text, and
|
|
|
6468 defaults to the current buffer.
|
|
|
6469 */
|
|
|
6470 (start, end, prop, value, object))
|
|
|
6471 {
|
|
|
6472 /* This function can GC */
|
|
665
|
6473 Bytebpos s, e;
|
|
428
|
6474
|
|
|
6475 object = decode_buffer_or_string (object);
|
|
|
6476 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
6477 put_text_prop (s, e, object, prop, value, 0);
|
|
|
6478 return prop;
|
|
|
6479 }
|
|
|
6480
|
|
|
6481 DEFUN ("add-text-properties", Fadd_text_properties, 3, 4, 0, /*
|
|
|
6482 Add properties to the characters from START to END.
|
|
|
6483 The third argument PROPS is a property list specifying the property values
|
|
|
6484 to add. The optional fourth argument, OBJECT, is the buffer or string
|
|
|
6485 containing the text and defaults to the current buffer. Returns t if
|
|
|
6486 any property was changed, nil otherwise.
|
|
|
6487 */
|
|
|
6488 (start, end, props, object))
|
|
|
6489 {
|
|
|
6490 /* This function can GC */
|
|
|
6491 int changed = 0;
|
|
665
|
6492 Bytebpos s, e;
|
|
428
|
6493
|
|
|
6494 object = decode_buffer_or_string (object);
|
|
|
6495 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
6496 CHECK_LIST (props);
|
|
|
6497 for (; !NILP (props); props = Fcdr (Fcdr (props)))
|
|
|
6498 {
|
|
|
6499 Lisp_Object prop = XCAR (props);
|
|
|
6500 Lisp_Object value = Fcar (XCDR (props));
|
|
|
6501 changed |= put_text_prop (s, e, object, prop, value, 1);
|
|
|
6502 }
|
|
|
6503 return changed ? Qt : Qnil;
|
|
|
6504 }
|
|
|
6505
|
|
|
6506
|
|
|
6507 DEFUN ("add-nonduplicable-text-properties", Fadd_nonduplicable_text_properties,
|
|
|
6508 3, 4, 0, /*
|
|
|
6509 Add nonduplicable properties to the characters from START to END.
|
|
|
6510 \(The properties will not be copied when the characters are copied.)
|
|
|
6511 The third argument PROPS is a property list specifying the property values
|
|
|
6512 to add. The optional fourth argument, OBJECT, is the buffer or string
|
|
|
6513 containing the text and defaults to the current buffer. Returns t if
|
|
|
6514 any property was changed, nil otherwise.
|
|
|
6515 */
|
|
|
6516 (start, end, props, object))
|
|
|
6517 {
|
|
|
6518 /* This function can GC */
|
|
|
6519 int changed = 0;
|
|
665
|
6520 Bytebpos s, e;
|
|
428
|
6521
|
|
|
6522 object = decode_buffer_or_string (object);
|
|
|
6523 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
6524 CHECK_LIST (props);
|
|
|
6525 for (; !NILP (props); props = Fcdr (Fcdr (props)))
|
|
|
6526 {
|
|
|
6527 Lisp_Object prop = XCAR (props);
|
|
|
6528 Lisp_Object value = Fcar (XCDR (props));
|
|
|
6529 changed |= put_text_prop (s, e, object, prop, value, 0);
|
|
|
6530 }
|
|
|
6531 return changed ? Qt : Qnil;
|
|
|
6532 }
|
|
|
6533
|
|
|
6534 DEFUN ("remove-text-properties", Fremove_text_properties, 3, 4, 0, /*
|
|
|
6535 Remove the given properties from all characters in the specified region.
|
|
|
6536 PROPS should be a plist, but the values in that plist are ignored (treated
|
|
|
6537 as nil). Returns t if any property was changed, nil otherwise.
|
|
|
6538 Fourth argument OBJECT is the buffer or string containing the text, and
|
|
|
6539 defaults to the current buffer.
|
|
|
6540 */
|
|
|
6541 (start, end, props, object))
|
|
|
6542 {
|
|
|
6543 /* This function can GC */
|
|
|
6544 int changed = 0;
|
|
665
|
6545 Bytebpos s, e;
|
|
428
|
6546
|
|
|
6547 object = decode_buffer_or_string (object);
|
|
|
6548 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0);
|
|
|
6549 CHECK_LIST (props);
|
|
|
6550 for (; !NILP (props); props = Fcdr (Fcdr (props)))
|
|
|
6551 {
|
|
|
6552 Lisp_Object prop = XCAR (props);
|
|
|
6553 changed |= put_text_prop (s, e, object, prop, Qnil, 1);
|
|
|
6554 }
|
|
|
6555 return changed ? Qt : Qnil;
|
|
|
6556 }
|
|
|
6557
|
|
|
6558 /* Whenever a text-prop extent is pasted into a buffer (via `yank' or `insert'
|
|
|
6559 or whatever) we attach the properties to the buffer by calling
|
|
|
6560 `put-text-property' instead of by simply allowing the extent to be copied or
|
|
|
6561 re-attached. Then we return nil, telling the extents code not to attach it
|
|
|
6562 again. By handing the insertion hackery in this way, we make kill/yank
|
|
|
6563 behave consistently with put-text-property and not fragment the extents
|
|
|
6564 (since text-prop extents must partition, not overlap).
|
|
|
6565
|
|
|
6566 The lisp implementation of this was probably fast enough, but since I moved
|
|
|
6567 the rest of the put-text-prop code here, I moved this as well for
|
|
|
6568 completeness.
|
|
|
6569 */
|
|
|
6570 DEFUN ("text-prop-extent-paste-function", Ftext_prop_extent_paste_function,
|
|
|
6571 3, 3, 0, /*
|
|
|
6572 Used as the `paste-function' property of `text-prop' extents.
|
|
|
6573 */
|
|
|
6574 (extent, from, to))
|
|
|
6575 {
|
|
|
6576 /* This function can GC */
|
|
|
6577 Lisp_Object prop, val;
|
|
|
6578
|
|
|
6579 prop = Fextent_property (extent, Qtext_prop, Qnil);
|
|
|
6580 if (NILP (prop))
|
|
563
|
6581 signal_error (Qinternal_error,
|
|
442
|
6582 "Internal error: no text-prop", extent);
|
|
428
|
6583 val = Fextent_property (extent, prop, Qnil);
|
|
|
6584 #if 0
|
|
|
6585 /* removed by bill perry, 2/9/97
|
|
|
6586 ** This little bit of code would not allow you to have a text property
|
|
|
6587 ** with a value of Qnil. This is bad bad bad.
|
|
|
6588 */
|
|
|
6589 if (NILP (val))
|
|
563
|
6590 signal_error_2 (Qinternal_error,
|
|
442
|
6591 "Internal error: no text-prop",
|
|
|
6592 extent, prop);
|
|
428
|
6593 #endif
|
|
|
6594 Fput_text_property (from, to, prop, val, Qnil);
|
|
|
6595 return Qnil; /* important! */
|
|
|
6596 }
|
|
|
6597
|
|
|
6598 /* This function could easily be written in Lisp but the C code wants
|
|
|
6599 to use it in connection with invisible extents (at least currently).
|
|
|
6600 If this changes, consider moving this back into Lisp. */
|
|
|
6601
|
|
|
6602 DEFUN ("next-single-property-change", Fnext_single_property_change,
|
|
|
6603 2, 4, 0, /*
|
|
|
6604 Return the position of next property change for a specific property.
|
|
|
6605 Scans characters forward from POS till it finds a change in the PROP
|
|
|
6606 property, then returns the position of the change. The optional third
|
|
|
6607 argument OBJECT is the buffer or string to scan (defaults to the current
|
|
|
6608 buffer).
|
|
|
6609 The property values are compared with `eq'.
|
|
444
|
6610 Return nil if the property is constant all the way to the end of OBJECT.
|
|
428
|
6611 If the value is non-nil, it is a position greater than POS, never equal.
|
|
|
6612
|
|
|
6613 If the optional fourth argument LIMIT is non-nil, don't search
|
|
|
6614 past position LIMIT; return LIMIT if nothing is found before LIMIT.
|
|
|
6615 If two or more extents with conflicting non-nil values for PROP overlap
|
|
|
6616 a particular character, it is undefined which value is considered to be
|
|
|
6617 the value of PROP. (Note that this situation will not happen if you always
|
|
|
6618 use the text-property primitives.)
|
|
|
6619 */
|
|
|
6620 (pos, prop, object, limit))
|
|
|
6621 {
|
|
665
|
6622 Charbpos bpos;
|
|
|
6623 Charbpos blim;
|
|
428
|
6624 Lisp_Object extent, value;
|
|
|
6625 int limit_was_nil;
|
|
|
6626
|
|
|
6627 object = decode_buffer_or_string (object);
|
|
|
6628 bpos = get_buffer_or_string_pos_char (object, pos, 0);
|
|
|
6629 if (NILP (limit))
|
|
|
6630 {
|
|
|
6631 blim = buffer_or_string_accessible_end_char (object);
|
|
|
6632 limit_was_nil = 1;
|
|
|
6633 }
|
|
|
6634 else
|
|
|
6635 {
|
|
|
6636 blim = get_buffer_or_string_pos_char (object, limit, 0);
|
|
|
6637 limit_was_nil = 0;
|
|
|
6638 }
|
|
|
6639
|
|
|
6640 extent = Fextent_at (make_int (bpos), object, prop, Qnil, Qnil);
|
|
|
6641 if (!NILP (extent))
|
|
|
6642 value = Fextent_property (extent, prop, Qnil);
|
|
|
6643 else
|
|
|
6644 value = Qnil;
|
|
|
6645
|
|
|
6646 while (1)
|
|
|
6647 {
|
|
|
6648 bpos = XINT (Fnext_extent_change (make_int (bpos), object));
|
|
|
6649 if (bpos >= blim)
|
|
|
6650 break; /* property is the same all the way to the end */
|
|
|
6651 extent = Fextent_at (make_int (bpos), object, prop, Qnil, Qnil);
|
|
|
6652 if ((NILP (extent) && !NILP (value)) ||
|
|
|
6653 (!NILP (extent) && !EQ (value,
|
|
|
6654 Fextent_property (extent, prop, Qnil))))
|
|
|
6655 return make_int (bpos);
|
|
|
6656 }
|
|
|
6657
|
|
|
6658 /* I think it's more sensible for this function to return nil always
|
|
|
6659 in this situation and it used to do it this way, but it's been changed
|
|
|
6660 for FSF compatibility. */
|
|
|
6661 if (limit_was_nil)
|
|
|
6662 return Qnil;
|
|
|
6663 else
|
|
|
6664 return make_int (blim);
|
|
|
6665 }
|
|
|
6666
|
|
|
6667 /* See comment on previous function about why this is written in C. */
|
|
|
6668
|
|
|
6669 DEFUN ("previous-single-property-change", Fprevious_single_property_change,
|
|
|
6670 2, 4, 0, /*
|
|
|
6671 Return the position of next property change for a specific property.
|
|
|
6672 Scans characters backward from POS till it finds a change in the PROP
|
|
|
6673 property, then returns the position of the change. The optional third
|
|
|
6674 argument OBJECT is the buffer or string to scan (defaults to the current
|
|
|
6675 buffer).
|
|
|
6676 The property values are compared with `eq'.
|
|
444
|
6677 Return nil if the property is constant all the way to the start of OBJECT.
|
|
428
|
6678 If the value is non-nil, it is a position less than POS, never equal.
|
|
|
6679
|
|
|
6680 If the optional fourth argument LIMIT is non-nil, don't search back
|
|
|
6681 past position LIMIT; return LIMIT if nothing is found until LIMIT.
|
|
|
6682 If two or more extents with conflicting non-nil values for PROP overlap
|
|
|
6683 a particular character, it is undefined which value is considered to be
|
|
|
6684 the value of PROP. (Note that this situation will not happen if you always
|
|
|
6685 use the text-property primitives.)
|
|
|
6686 */
|
|
|
6687 (pos, prop, object, limit))
|
|
|
6688 {
|
|
665
|
6689 Charbpos bpos;
|
|
|
6690 Charbpos blim;
|
|
428
|
6691 Lisp_Object extent, value;
|
|
|
6692 int limit_was_nil;
|
|
|
6693
|
|
|
6694 object = decode_buffer_or_string (object);
|
|
|
6695 bpos = get_buffer_or_string_pos_char (object, pos, 0);
|
|
|
6696 if (NILP (limit))
|
|
|
6697 {
|
|
|
6698 blim = buffer_or_string_accessible_begin_char (object);
|
|
|
6699 limit_was_nil = 1;
|
|
|
6700 }
|
|
|
6701 else
|
|
|
6702 {
|
|
|
6703 blim = get_buffer_or_string_pos_char (object, limit, 0);
|
|
|
6704 limit_was_nil = 0;
|
|
|
6705 }
|
|
|
6706
|
|
|
6707 /* extent-at refers to the character AFTER bpos, but we want the
|
|
|
6708 character before bpos. Thus the - 1. extent-at simply
|
|
|
6709 returns nil on bogus positions, so not to worry. */
|
|
|
6710 extent = Fextent_at (make_int (bpos - 1), object, prop, Qnil, Qnil);
|
|
|
6711 if (!NILP (extent))
|
|
|
6712 value = Fextent_property (extent, prop, Qnil);
|
|
|
6713 else
|
|
|
6714 value = Qnil;
|
|
|
6715
|
|
|
6716 while (1)
|
|
|
6717 {
|
|
|
6718 bpos = XINT (Fprevious_extent_change (make_int (bpos), object));
|
|
|
6719 if (bpos <= blim)
|
|
|
6720 break; /* property is the same all the way to the beginning */
|
|
|
6721 extent = Fextent_at (make_int (bpos - 1), object, prop, Qnil, Qnil);
|
|
|
6722 if ((NILP (extent) && !NILP (value)) ||
|
|
|
6723 (!NILP (extent) && !EQ (value,
|
|
|
6724 Fextent_property (extent, prop, Qnil))))
|
|
|
6725 return make_int (bpos);
|
|
|
6726 }
|
|
|
6727
|
|
|
6728 /* I think it's more sensible for this function to return nil always
|
|
|
6729 in this situation and it used to do it this way, but it's been changed
|
|
|
6730 for FSF compatibility. */
|
|
|
6731 if (limit_was_nil)
|
|
|
6732 return Qnil;
|
|
|
6733 else
|
|
|
6734 return make_int (blim);
|
|
|
6735 }
|
|
|
6736
|
|
|
6737 #ifdef MEMORY_USAGE_STATS
|
|
|
6738
|
|
|
6739 int
|
|
|
6740 compute_buffer_extent_usage (struct buffer *b, struct overhead_stats *ovstats)
|
|
|
6741 {
|
|
|
6742 /* #### not yet written */
|
|
|
6743 return 0;
|
|
|
6744 }
|
|
|
6745
|
|
|
6746 #endif /* MEMORY_USAGE_STATS */
|
|
|
6747
|
|
|
6748
|
|
|
6749 /************************************************************************/
|
|
|
6750 /* initialization */
|
|
|
6751 /************************************************************************/
|
|
|
6752
|
|
|
6753 void
|
|
|
6754 syms_of_extents (void)
|
|
|
6755 {
|
|
442
|
6756 INIT_LRECORD_IMPLEMENTATION (extent);
|
|
|
6757 INIT_LRECORD_IMPLEMENTATION (extent_info);
|
|
|
6758 INIT_LRECORD_IMPLEMENTATION (extent_auxiliary);
|
|
|
6759
|
|
563
|
6760 DEFSYMBOL (Qextentp);
|
|
|
6761 DEFSYMBOL (Qextent_live_p);
|
|
|
6762
|
|
|
6763 DEFSYMBOL (Qall_extents_closed);
|
|
|
6764 DEFSYMBOL (Qall_extents_open);
|
|
|
6765 DEFSYMBOL (Qall_extents_closed_open);
|
|
|
6766 DEFSYMBOL (Qall_extents_open_closed);
|
|
|
6767 DEFSYMBOL (Qstart_in_region);
|
|
|
6768 DEFSYMBOL (Qend_in_region);
|
|
|
6769 DEFSYMBOL (Qstart_and_end_in_region);
|
|
|
6770 DEFSYMBOL (Qstart_or_end_in_region);
|
|
|
6771 DEFSYMBOL (Qnegate_in_region);
|
|
|
6772
|
|
|
6773 DEFSYMBOL (Qdetached);
|
|
|
6774 DEFSYMBOL (Qdestroyed);
|
|
|
6775 DEFSYMBOL (Qbegin_glyph);
|
|
|
6776 DEFSYMBOL (Qend_glyph);
|
|
|
6777 DEFSYMBOL (Qstart_open);
|
|
|
6778 DEFSYMBOL (Qend_open);
|
|
|
6779 DEFSYMBOL (Qstart_closed);
|
|
|
6780 DEFSYMBOL (Qend_closed);
|
|
|
6781 DEFSYMBOL (Qread_only);
|
|
|
6782 /* DEFSYMBOL (Qhighlight); in faces.c */
|
|
|
6783 DEFSYMBOL (Qunique);
|
|
|
6784 DEFSYMBOL (Qduplicable);
|
|
|
6785 DEFSYMBOL (Qdetachable);
|
|
|
6786 DEFSYMBOL (Qpriority);
|
|
|
6787 DEFSYMBOL (Qmouse_face);
|
|
|
6788 DEFSYMBOL (Qinitial_redisplay_function);
|
|
|
6789
|
|
|
6790
|
|
|
6791 DEFSYMBOL (Qglyph_layout); /* backwards compatibility */
|
|
|
6792 DEFSYMBOL (Qbegin_glyph_layout);
|
|
|
6793 DEFSYMBOL (Qend_glyph_layout);
|
|
|
6794 DEFSYMBOL (Qoutside_margin);
|
|
|
6795 DEFSYMBOL (Qinside_margin);
|
|
|
6796 DEFSYMBOL (Qwhitespace);
|
|
428
|
6797 /* Qtext defined in general.c */
|
|
|
6798
|
|
563
|
6799 DEFSYMBOL (Qpaste_function);
|
|
|
6800 DEFSYMBOL (Qcopy_function);
|
|
|
6801
|
|
|
6802 DEFSYMBOL (Qtext_prop);
|
|
|
6803 DEFSYMBOL (Qtext_prop_extent_paste_function);
|
|
428
|
6804
|
|
|
6805 DEFSUBR (Fextentp);
|
|
|
6806 DEFSUBR (Fextent_live_p);
|
|
|
6807 DEFSUBR (Fextent_detached_p);
|
|
|
6808 DEFSUBR (Fextent_start_position);
|
|
|
6809 DEFSUBR (Fextent_end_position);
|
|
|
6810 DEFSUBR (Fextent_object);
|
|
|
6811 DEFSUBR (Fextent_length);
|
|
|
6812
|
|
|
6813 DEFSUBR (Fmake_extent);
|
|
|
6814 DEFSUBR (Fcopy_extent);
|
|
|
6815 DEFSUBR (Fdelete_extent);
|
|
|
6816 DEFSUBR (Fdetach_extent);
|
|
|
6817 DEFSUBR (Fset_extent_endpoints);
|
|
|
6818 DEFSUBR (Fnext_extent);
|
|
|
6819 DEFSUBR (Fprevious_extent);
|
|
|
6820 #if DEBUG_XEMACS
|
|
|
6821 DEFSUBR (Fnext_e_extent);
|
|
|
6822 DEFSUBR (Fprevious_e_extent);
|
|
|
6823 #endif
|
|
|
6824 DEFSUBR (Fnext_extent_change);
|
|
|
6825 DEFSUBR (Fprevious_extent_change);
|
|
|
6826
|
|
|
6827 DEFSUBR (Fextent_parent);
|
|
|
6828 DEFSUBR (Fextent_children);
|
|
|
6829 DEFSUBR (Fset_extent_parent);
|
|
|
6830
|
|
|
6831 DEFSUBR (Fextent_in_region_p);
|
|
|
6832 DEFSUBR (Fmap_extents);
|
|
|
6833 DEFSUBR (Fmap_extent_children);
|
|
|
6834 DEFSUBR (Fextent_at);
|
|
442
|
6835 DEFSUBR (Fextents_at);
|
|
428
|
6836
|
|
|
6837 DEFSUBR (Fset_extent_initial_redisplay_function);
|
|
|
6838 DEFSUBR (Fextent_face);
|
|
|
6839 DEFSUBR (Fset_extent_face);
|
|
|
6840 DEFSUBR (Fextent_mouse_face);
|
|
|
6841 DEFSUBR (Fset_extent_mouse_face);
|
|
|
6842 DEFSUBR (Fset_extent_begin_glyph);
|
|
|
6843 DEFSUBR (Fset_extent_end_glyph);
|
|
|
6844 DEFSUBR (Fextent_begin_glyph);
|
|
|
6845 DEFSUBR (Fextent_end_glyph);
|
|
|
6846 DEFSUBR (Fset_extent_begin_glyph_layout);
|
|
|
6847 DEFSUBR (Fset_extent_end_glyph_layout);
|
|
|
6848 DEFSUBR (Fextent_begin_glyph_layout);
|
|
|
6849 DEFSUBR (Fextent_end_glyph_layout);
|
|
|
6850 DEFSUBR (Fset_extent_priority);
|
|
|
6851 DEFSUBR (Fextent_priority);
|
|
|
6852 DEFSUBR (Fset_extent_property);
|
|
|
6853 DEFSUBR (Fset_extent_properties);
|
|
|
6854 DEFSUBR (Fextent_property);
|
|
|
6855 DEFSUBR (Fextent_properties);
|
|
|
6856
|
|
|
6857 DEFSUBR (Fhighlight_extent);
|
|
|
6858 DEFSUBR (Fforce_highlight_extent);
|
|
|
6859
|
|
|
6860 DEFSUBR (Finsert_extent);
|
|
|
6861
|
|
|
6862 DEFSUBR (Fget_text_property);
|
|
|
6863 DEFSUBR (Fget_char_property);
|
|
|
6864 DEFSUBR (Fput_text_property);
|
|
|
6865 DEFSUBR (Fput_nonduplicable_text_property);
|
|
|
6866 DEFSUBR (Fadd_text_properties);
|
|
|
6867 DEFSUBR (Fadd_nonduplicable_text_properties);
|
|
|
6868 DEFSUBR (Fremove_text_properties);
|
|
|
6869 DEFSUBR (Ftext_prop_extent_paste_function);
|
|
|
6870 DEFSUBR (Fnext_single_property_change);
|
|
|
6871 DEFSUBR (Fprevious_single_property_change);
|
|
|
6872 }
|
|
|
6873
|
|
|
6874 void
|
|
|
6875 reinit_vars_of_extents (void)
|
|
|
6876 {
|
|
|
6877 extent_auxiliary_defaults.begin_glyph = Qnil;
|
|
|
6878 extent_auxiliary_defaults.end_glyph = Qnil;
|
|
|
6879 extent_auxiliary_defaults.parent = Qnil;
|
|
|
6880 extent_auxiliary_defaults.children = Qnil;
|
|
|
6881 extent_auxiliary_defaults.priority = 0;
|
|
|
6882 extent_auxiliary_defaults.invisible = Qnil;
|
|
|
6883 extent_auxiliary_defaults.read_only = Qnil;
|
|
|
6884 extent_auxiliary_defaults.mouse_face = Qnil;
|
|
|
6885 extent_auxiliary_defaults.initial_redisplay_function = Qnil;
|
|
|
6886 extent_auxiliary_defaults.before_change_functions = Qnil;
|
|
|
6887 extent_auxiliary_defaults.after_change_functions = Qnil;
|
|
|
6888 }
|
|
|
6889
|
|
|
6890 void
|
|
|
6891 vars_of_extents (void)
|
|
|
6892 {
|
|
|
6893 reinit_vars_of_extents ();
|
|
|
6894
|
|
|
6895 DEFVAR_INT ("mouse-highlight-priority", &mouse_highlight_priority /*
|
|
|
6896 The priority to use for the mouse-highlighting pseudo-extent
|
|
|
6897 that is used to highlight extents with the `mouse-face' attribute set.
|
|
|
6898 See `set-extent-priority'.
|
|
|
6899 */ );
|
|
|
6900 /* Set mouse-highlight-priority (which ends up being used both for the
|
|
|
6901 mouse-highlighting pseudo-extent and the primary selection extent)
|
|
|
6902 to a very high value because very few extents should override it.
|
|
|
6903 1000 gives lots of room below it for different-prioritized extents.
|
|
|
6904 10 doesn't. ediff, for example, likes to use priorities around 100.
|
|
|
6905 --ben */
|
|
|
6906 mouse_highlight_priority = /* 10 */ 1000;
|
|
|
6907
|
|
|
6908 DEFVAR_LISP ("default-text-properties", &Vdefault_text_properties /*
|
|
|
6909 Property list giving default values for text properties.
|
|
|
6910 Whenever a character does not specify a value for a property, the value
|
|
|
6911 stored in this list is used instead. This only applies when the
|
|
|
6912 functions `get-text-property' or `get-char-property' are called.
|
|
|
6913 */ );
|
|
|
6914 Vdefault_text_properties = Qnil;
|
|
|
6915
|
|
|
6916 staticpro (&Vlast_highlighted_extent);
|
|
|
6917 Vlast_highlighted_extent = Qnil;
|
|
|
6918
|
|
|
6919 Vextent_face_reusable_list = Fcons (Qnil, Qnil);
|
|
|
6920 staticpro (&Vextent_face_reusable_list);
|
|
|
6921 }
|
|
|
6922
|
|
|
6923 void
|
|
|
6924 complex_vars_of_extents (void)
|
|
|
6925 {
|
|
|
6926 staticpro (&Vextent_face_memoize_hash_table);
|
|
|
6927 /* The memoize hash table maps from lists of symbols to lists of
|
|
|
6928 faces. It needs to be `equal' to implement the memoization.
|
|
|
6929 The reverse table maps in the other direction and just needs
|
|
|
6930 to do `eq' comparison because the lists of faces are already
|
|
|
6931 memoized. */
|
|
|
6932 Vextent_face_memoize_hash_table =
|
|
|
6933 make_lisp_hash_table (100, HASH_TABLE_VALUE_WEAK, HASH_TABLE_EQUAL);
|
|
|
6934 staticpro (&Vextent_face_reverse_memoize_hash_table);
|
|
|
6935 Vextent_face_reverse_memoize_hash_table =
|
|
|
6936 make_lisp_hash_table (100, HASH_TABLE_KEY_WEAK, HASH_TABLE_EQ);
|
|
|
6937 }
|
