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428
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1 /* Face data structures.
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2 Copyright (C) 1995 Board of Trustees, University of Illinois.
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771
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3 Copyright (C) 1995, 2002 Ben Wing
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428
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Not in FSF. */
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23
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24 #ifndef INCLUDED_faces_h_
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25 #define INCLUDED_faces_h_
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26
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27 #include "charset.h" /* for NUM_LEADING_BYTES */
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428
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28
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440
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29 /* a Lisp_Face is the C object corresponding to a face. There is one
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30 of these per face. It basically contains all of the specifiers for
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31 the built-in face properties, plus the plist of user-specified
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32 properties. */
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33
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34 struct Lisp_Face
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35 {
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2720
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36 #ifdef MC_ALLOC
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37 struct lrecord_header header;
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38 #else /* MC_ALLOC */
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428
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39 struct lcrecord_header header;
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2720
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40 #endif /* MC_ALLOC */
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41
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42 Lisp_Object name;
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43 Lisp_Object doc_string;
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44 unsigned int dirty :1; /* Set whenever a face property is changed on
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45 a face. */
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46
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47 Lisp_Object foreground;
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48 Lisp_Object background;
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49 Lisp_Object font;
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50
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51 Lisp_Object display_table;
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52 Lisp_Object background_pixmap;
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53
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54 Lisp_Object underline;
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55 Lisp_Object strikethru;
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56 Lisp_Object highlight;
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57 Lisp_Object dim;
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58 Lisp_Object blinking;
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59 Lisp_Object reverse;
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60
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61 Lisp_Object plist;
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62
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63 Lisp_Object charsets_warned_about;
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64 };
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65
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66 /*
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67
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68 A face cache element caches the results of instantiating the
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69 properties of a face in a particular window. (Instantiation can
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70 take a long time so this is very important.) Each window contains
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71 an array of face cache elements (called the "face cache"), one for
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72 each face that has been seen in the window so far.
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73
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74 Some tricky stuff is done to make sure the face cache does not
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75 become inconsistent:
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76
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77 1) Switching buffers in a window clears the face cache for that
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78 window, because this can change the way any property is
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79 instantiated in the window.
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80 2) Setting a face property causes that face to be marked as
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81 dirty. This causes various stuff to happen to make sure
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82 the appropriate face cache elements are invalidated.
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83 (#### Actually this doesn't work quite right, and errs
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84 too much on the side of invalidating unnecessary stuff.)
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85
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86 There are also face cache elements for "merged faces", which are the
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87 result of merging all the faces that overlap a particular buffer
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88 position. The merging is always done in the context of a particular
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89 domain (specifically, a window), and the face cache element is
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90 specific to a particular window. (Face cache elements are contained
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91 in an array that is attached to each struct_window.) The reason that
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92 the merging takes place in the context of a particular window has
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93 to do with the way the merging works:
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94
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95 1) All extents overlying the buffer position are sorted by descending
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96 priority.
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97 2) The property of a particular merged face comes from the highest-
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98 priority face that specifies a value for that particular property.
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99 3) The way to determine whether a face specifies a value for a
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100 particular property is to instantiate that face's property in
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101 the window in question with the no-fallback option set, to
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102 see if we got anything.
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103
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104 For Mule, things get a bit trickier because there can be multiple
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105 fonts per face/window combination -- the charset is an argument
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106 to specifier-instance.
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107
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108 We have two possible data structure representations:
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109
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110 1) Keep the original "one font per face cache element" representation
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111 and use a different face cache element for each charset.
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112 2) Allow multiple fonts to be in a single face cache element.
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113
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114 I've chosen to use (2) -- the data structure gets more complicated
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115 but the algorithms for maintaining face cache elements end up
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116 simpler.
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117 */
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118
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119 #define NUM_STATIC_CACHEL_FACES 4
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120
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121 typedef struct face_cachel face_cachel;
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122 struct face_cachel
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123 {
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124 /* There are two kinds of cachels; those created from a single face
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125 and those created by merging more than one face. In the former
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126 case, the FACE element specifies the face used. In the latter
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127 case, the MERGED_FACES_STATIC and MERGED_FACES elements specify
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128 the faces used for merging by giving the indices of the
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129 corresponding single-face cachels.
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130
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131 Formerly we didn't bother to keep track of the faces used for
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442
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132 merging. We do now because we need to do so because there is no
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428
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133 other way to properly handle multiple charsets for Mule in the
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134 presence of display tables short of always computing the values
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135 for all charsets, which is very expensive. Instead, we use a
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136 lazy scheme where we only compute the font for a particular charset
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137 when it is needed. (The exception is the font for the ASCII charset.
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138 We always compute it, just like the other attributes, because
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139 many places in the C code refer to the font of the ASCII charset
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140 and expect it to always be there.)
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141
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142 We store the first four faces in a static array, and use a
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143 Dynarr for the rest. This has the advantage that the space used
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144 is small but the Dynarr will almost never be created, so we
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145 won't spend much time in malloc()/free().
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146
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147 The order of the faces here is decreasing extent priority. */
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148 Lisp_Object face;
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149 int merged_faces_static[NUM_STATIC_CACHEL_FACES];
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150 int_dynarr *merged_faces;
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151 int nfaces;
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152
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153 /* The values stored here are computed by calling specifier_instance()
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154 on the appropriate specifiers. This means that we will have either
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155 a value computed from the face itself or a value computed from the
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156 default face. We need to distinguish the two so that merging works
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157 properly -- a value that comes from the default face is treated
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158 as "unspecified" during merging and is overridden by lower-priority
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159 faces. This is what the _specified flags below are for. */
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160
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161 Lisp_Object foreground;
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162 Lisp_Object background;
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771
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163 /* There are currently 128 or 129 possible charsets under Mule. For the
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428
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164 moment we just take the easy way out and allocate space for each
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165 of them. This avoids messing with Dynarrs.
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166
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167 #### We should look into this and probably clean it up
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168 to use Dynarrs. This may be a big space hog as is. */
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169 Lisp_Object font[NUM_LEADING_BYTES];
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170
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171 Lisp_Object display_table;
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172 Lisp_Object background_pixmap;
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173
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174 unsigned int underline :1;
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175 unsigned int strikethru :1;
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176 unsigned int highlight :1;
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177 unsigned int dim :1;
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178 unsigned int blinking :1;
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179 unsigned int reverse :1;
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180
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181 /* Used when merging to tell if the above field represents an actual
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182 value of this face or a fallback value. */
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183 /* #### Of course we should use a bit array or something. */
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184 unsigned char font_specified[NUM_LEADING_BYTES];
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185 unsigned int foreground_specified :1;
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186 unsigned int background_specified :1;
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187 unsigned int display_table_specified :1;
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188 unsigned int background_pixmap_specified :1;
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189
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190 unsigned int strikethru_specified :1;
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191 unsigned int underline_specified :1;
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192 unsigned int highlight_specified :1;
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193 unsigned int dim_specified :1;
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194 unsigned int blinking_specified :1;
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195 unsigned int reverse_specified :1;
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196
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197 /* The updated flag is set after we calculate the values for the
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198 face cachel and cleared whenever a face changes, to indicate
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199 that the values stored here might be wrong. The next time
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200 we go to access the values, we recompute them; if any values
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201 change, we set the DIRTY flag, which tells the output routines
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202 that a face value has in fact changed and the sections of text
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203 using this face need to be redrawn.
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204
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205 It is trickier with fonts because we don't automatically
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206 recompute the fonts but do it only when it is necessary.
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207 (The ASCII font is an exception, of course; see above).
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208
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209 In the case of fonts, we maintain a separate updated flag
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210 for each font. Whenever we need to access the font for
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211 a particular charset, we recalculate it if either its
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212 value is Qunbound (meaning it's never been computed at all)
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213 or the updated flag is not set. We set the dirty flag if
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214 the value is not the same as before and the previous value
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215 was not Qunbound.
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216
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217 #### Note that we don't yet deal with the case of the new
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218 value being Qunbound, as could happen if no fonts of the
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219 right sort are available on the system. In this case, the
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220 whole program will just crash. For the moment, this is
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221 OK (for debugging purposes) but we should fix this by
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222 storing a "blank font" if the instantiation fails. */
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223 unsigned int dirty :1;
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224 unsigned int updated :1;
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225 /* #### Of course we should use a bit array or something. */
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226 unsigned char font_updated[NUM_LEADING_BYTES];
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227 };
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228
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440
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229 DECLARE_LRECORD (face, Lisp_Face);
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230 #define XFACE(x) XRECORD (x, face, Lisp_Face)
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617
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231 #define wrap_face(p) wrap_record (p, face)
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428
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232 #define FACEP(x) RECORDP (x, face)
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233 #define CHECK_FACE(x) CHECK_RECORD (x, face)
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234
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235 Lisp_Object ensure_face_cachel_contains_charset (struct face_cachel *cachel,
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236 Lisp_Object domain,
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237 Lisp_Object charset);
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238 void ensure_face_cachel_complete (struct face_cachel *cachel,
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239 Lisp_Object domain,
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240 unsigned char *charsets);
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241 void update_face_cachel_data (struct face_cachel *cachel,
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242 Lisp_Object domain,
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243 Lisp_Object face);
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244 void face_cachel_charset_font_metric_info (struct face_cachel *cachel,
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245 unsigned char *charsets,
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246 struct font_metric_info *fm);
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247 void mark_face_cachels (face_cachel_dynarr *elements);
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248 void mark_face_cachels_as_clean (struct window *w);
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249 void mark_face_cachels_as_not_updated (struct window *w);
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250 void reset_face_cachel (struct face_cachel *inst);
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251 void reset_face_cachels (struct window *w);
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252 face_index get_builtin_face_cache_index (struct window *w,
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253 Lisp_Object face);
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254 #ifdef MEMORY_USAGE_STATS
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255 int compute_face_cachel_usage (face_cachel_dynarr *face_cachels,
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256 struct overhead_stats *ovstats);
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257 #endif /* MEMORY_USAGE_STATS */
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258
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259 EXFUN (Fface_name, 1);
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260 EXFUN (Ffind_face, 1);
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261 EXFUN (Fget_face, 1);
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262
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263 extern Lisp_Object Qstrikethru, Vbuilt_in_face_specifiers, Vdefault_face;
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264 extern Lisp_Object Vleft_margin_face, Vpointer_face, Vright_margin_face;
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432
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265 extern Lisp_Object Vtext_cursor_face, Vvertical_divider_face;
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428
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266 extern Lisp_Object Vtoolbar_face, Vgui_element_face, Vwidget_face;
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267
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268 void mark_all_faces_as_clean (void);
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269 void init_frame_faces (struct frame *f);
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270 void init_device_faces (struct device *d);
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271 void init_global_faces (struct device *d);
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272 face_index get_extent_fragment_face_cache_index (struct window *w,
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273 struct extent_fragment *ef);
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274 void update_frame_face_values (struct frame *f);
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275 void face_property_was_changed (Lisp_Object face, Lisp_Object property,
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276 Lisp_Object locale);
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277 void default_face_font_info (Lisp_Object domain, int *ascent,
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278 int *descent, int *height, int *width,
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279 int *proportional_p);
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280 void default_face_height_and_width (Lisp_Object domain,
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281 int *height, int *width);
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282 void default_face_height_and_width_1 (Lisp_Object domain,
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283 int *height, int *width);
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284
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285 #define FACE_CACHEL_FONT(cachel, charset) \
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286 (cachel->font[XCHARSET_LEADING_BYTE (charset) - MIN_LEADING_BYTE])
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428
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287
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288 #define WINDOW_FACE_CACHEL(window, index) \
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289 Dynarr_atp ((window)->face_cachels, index)
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290
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291 #define FACE_CACHEL_FINDEX_UNSAFE(cachel, offset) \
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292 ((offset) < NUM_STATIC_CACHEL_FACES \
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293 ? (cachel)->merged_faces_static[offset] \
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294 : Dynarr_at ((cachel)->merged_faces, (offset) - NUM_STATIC_CACHEL_FACES))
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295
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296 #define WINDOW_FACE_CACHEL_FACE(window, index) \
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297 (WINDOW_FACE_CACHEL (window, index)->face)
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298 #define WINDOW_FACE_CACHEL_FOREGROUND(window, index) \
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299 (WINDOW_FACE_CACHEL (window, index)->foreground)
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300 #define WINDOW_FACE_CACHEL_BACKGROUND(window, index) \
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301 (WINDOW_FACE_CACHEL (window, index)->background)
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302 /* #### This can be referenced by various functions,
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303 but face_cachels isn't initialized for the stream device.
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304 Since it doesn't need the value we just return nil here to avoid
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305 blowing up in multiple places. */
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306 #define WINDOW_FACE_CACHEL_FONT(window, index, charset) \
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307 ((window)->face_cachels \
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308 ? FACE_CACHEL_FONT (WINDOW_FACE_CACHEL (window, index), charset) \
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309 : Qnil)
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310 #define WINDOW_FACE_CACHEL_DISPLAY_TABLE(window, index) \
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311 (WINDOW_FACE_CACHEL (window, index)->display_table)
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312 #define WINDOW_FACE_CACHEL_BACKGROUND_PIXMAP(window, index) \
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313 (WINDOW_FACE_CACHEL (window, index)->background_pixmap)
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314 #define WINDOW_FACE_CACHEL_DIRTY(window, index) \
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315 (WINDOW_FACE_CACHEL (window, index)->dirty)
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316 #define WINDOW_FACE_CACHEL_UNDERLINE_P(window, index) \
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317 (WINDOW_FACE_CACHEL (window, index)->underline)
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318 #define WINDOW_FACE_CACHEL_HIGHLIGHT_P(window, index) \
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319 (WINDOW_FACE_CACHEL (window, index)->highlight)
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320 #define WINDOW_FACE_CACHEL_DIM_P(window, index) \
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321 (WINDOW_FACE_CACHEL (window, index)->dim)
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322 #define WINDOW_FACE_CACHEL_BLINKING_P(window, index) \
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323 (WINDOW_FACE_CACHEL (window, index)->blinking)
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324 #define WINDOW_FACE_CACHEL_REVERSE_P(window, index) \
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325 (WINDOW_FACE_CACHEL (window, index)->reverse)
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326
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327 #define FACE_PROPERTY_SPECIFIER(face, property) Fget (face, property, Qnil)
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328
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329 #define FACE_PROPERTY_INSTANCE_1(face, property, domain, errb, no_fallback, depth) \
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330 specifier_instance (FACE_PROPERTY_SPECIFIER (face, property), Qunbound, \
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331 domain, errb, 1, no_fallback, depth)
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332
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333 #define FACE_PROPERTY_INSTANCE(face, property, domain, no_fallback, depth) \
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793
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334 FACE_PROPERTY_INSTANCE_1 (face, property, domain, ERROR_ME_DEBUG_WARN, \
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428
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335 no_fallback, depth)
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336
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337 Lisp_Object face_property_matching_instance (Lisp_Object face,
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338 Lisp_Object property,
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339 Lisp_Object charset,
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340 Lisp_Object domain,
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578
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341 Error_Behavior errb,
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428
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342 int no_fallback,
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343 Lisp_Object depth);
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344
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345 #define FACE_PROPERTY_SPEC_LIST(face, property, locale) \
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346 Fspecifier_spec_list (FACE_PROPERTY_SPECIFIER (face, property), \
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347 locale, Qnil, Qnil)
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498
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348 #define SET_FACE_PROPERTY(face, property, value, locale, tag, how_to_add) \
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428
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349 Fadd_spec_to_specifier (FACE_PROPERTY_SPECIFIER (face, property), \
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498
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350 value, locale, tag, how_to_add)
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428
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351
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352 #define FACE_FOREGROUND(face, domain) \
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353 FACE_PROPERTY_INSTANCE (face, Qforeground, domain, 0, Qzero)
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354 #define FACE_BACKGROUND(face, domain) \
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355 FACE_PROPERTY_INSTANCE (face, Qbackground, domain, 0, Qzero)
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356 #define FACE_FONT(face, domain, charset) \
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357 face_property_matching_instance (face, Qfont, charset, domain, \
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793
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358 ERROR_ME_DEBUG_WARN, 0, Qzero)
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428
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359 #define FACE_DISPLAY_TABLE(face, domain) \
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360 FACE_PROPERTY_INSTANCE (face, Qdisplay_table, domain, 0, Qzero)
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361 #define FACE_BACKGROUND_PIXMAP(face, domain) \
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362 FACE_PROPERTY_INSTANCE (face, Qbackground_pixmap, domain, 0, Qzero)
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363 #define FACE_UNDERLINE_P(face, domain) \
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364 (!NILP (FACE_PROPERTY_INSTANCE (face, Qunderline, domain, 0, Qzero)))
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440
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365 #define FACE_STRIKETHRU_P(face, domain) \
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366 (!NILP (FACE_PROPERTY_INSTANCE (face, Qstrikethru, domain, 0, Qzero)))
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428
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367 #define FACE_HIGHLIGHT_P(face, domain) \
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368 (!NILP (FACE_PROPERTY_INSTANCE (face, Qhighlight, domain, 0, Qzero)))
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369 #define FACE_DIM_P(face, domain) \
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370 (!NILP (FACE_PROPERTY_INSTANCE (face, Qdim, domain, 0, Qzero)))
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371 #define FACE_BLINKING_P(face, domain) \
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372 (!NILP (FACE_PROPERTY_INSTANCE (face, Qblinking, domain, 0, Qzero)))
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373 #define FACE_REVERSE_P(face, domain) \
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374 (!NILP (FACE_PROPERTY_INSTANCE (face, Qreverse, domain, 0, Qzero)))
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375
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440
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376 #endif /* INCLUDED_faces_h_ */
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