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0
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1 /* Redisplay data structures.
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2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1996 Chuck Thompson.
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4 Copyright (C) 1995, 1996 Ben Wing.
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: Not in FSF. */
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24
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25 #ifndef _XEMACS_REDISPLAY_H_
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26 #define _XEMACS_REDISPLAY_H_
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27
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28 /* Redisplay DASSERT types */
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2
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29 #define DB_DISP_POS 1
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30 #define DB_DISP_TEXT_LAYOUT 2
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31 #define DB_DISP_REDISPLAY 4
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0
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32
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33 /* These are the possible return values from pixel_to_glyph_translation. */
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34 #define OVER_MODELINE 0
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35 #define OVER_TEXT 1
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36 #define OVER_OUTSIDE 2
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37 #define OVER_NOTHING 3
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38 #define OVER_BORDER 4
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39 #define OVER_TOOLBAR 5
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40
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41 #define NO_BLOCK -1
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42
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43 /* Imagine that the text in the buffer is displayed on a piece of paper
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44 the width of the frame and very very tall. The line start cache is
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45 an array of struct line_start_cache's, describing the start and
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46 end buffer positions for a contiguous set of lines on that piece
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47 of paper. */
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48
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49 struct line_start_cache
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50 {
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51 Bufpos start, end;
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52 int height;
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53 };
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54
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55 typedef struct line_start_cache_dynarr_type
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56 {
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57 Dynarr_declare (struct line_start_cache);
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58 } line_start_cache_dynarr;
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59
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60 /* The possible types of runes.
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61
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62 #### The Lisp_Glyph type is broken. There should instead be a pixmap
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63 type. Currently the device-specific output routines have to worry
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64 about whether the glyph is textual or not, etc. For Mule this is
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65 a big problem because you might need multiple fonts to display the
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66 text. It also eliminates optimizations that could come from glumping
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67 the text of multiple text glyphs together -- this makes displaying
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68 binary files (with lots of control chars, etc.) very very slow. */
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69
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70 #define RUNE_BLANK 0
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71 #define RUNE_CHAR 1
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72 #define RUNE_DGLYPH 2
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73 #define RUNE_HLINE 3
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74 #define RUNE_VLINE 4
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75
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76 #define CURSOR_ON 0
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77 #define CURSOR_OFF 1
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78 #define NO_CURSOR 2
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79 #define NEXT_CURSOR 3
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80 #define IGNORE_CURSOR 4
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81
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82 #define DEFAULT_INDEX (face_index) 0
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83 #define MODELINE_INDEX (face_index) 1
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84
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85 /* A rune is a single display element, such as a printable character
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86 or pixmap. Any single character in a buffer has one or more runes
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87 (or zero, if the character is invisible) corresponding to it.
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88 (Printable characters typically have one rune associated with them,
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89 but control characters have two -- a ^ and a letter -- and other
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90 non-printing characters (those displayed in octal) have four. */
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91
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92 struct rune
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93 {
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94 face_index findex; /* face rune is displayed with. The
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95 face_index is an index into a
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96 window-specific array of face cache
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97 elements. Each face cache element
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98 corresponds to one "merged face"
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99 (the result of merging all the
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100 faces that overlap the rune) and
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101 contains the instance values for
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102 each of the face properties in this
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103 particular window. */
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104
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105 short xpos; /* horizontal starting position in pixels */
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106 short width; /* pixel width of rune */
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107
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108
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109 Bufpos bufpos; /* buffer position this rune is displaying;
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110 for the modeline, the value here is a
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111 Charcount, but who's looking? */
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112 Bufpos endpos; /* if set this rune covers a range of pos */
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113 /* #### Chuck, what does it mean for a rune
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114 to cover a range of pos? I don't get
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115 this. */
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116 unsigned int cursor_type :3; /* is this rune covered by the cursor? */
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117 unsigned int type :3; /* type of rune object */
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118
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119 union /* Information specific to the type of rune */
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120 {
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121 /* DGLYPH */
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122 struct
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123 {
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124 Lisp_Object glyph;
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125 Lisp_Object extent; /* extent rune is attached to, if any.
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126 If this is a rune in the modeline
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127 then this might be nil. */
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128
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129 int xoffset; /* Number of pixels that need to be
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130 chopped off the left of the glyph.
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131 This has the effect of shifting the
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132 glyph to the left while still clipping
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133 at XPOS. */
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134 } dglyph;
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135
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136 /* CHAR */
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137 struct
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138 {
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139 Emchar ch; /* Cbaracter of this rune. */
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140 } chr;
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141
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142 /* HLINE */
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143 struct
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144 {
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145 int thickness; /* how thick to make hline */
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146 int yoffset; /* how far down from top of line to put top */
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147 } hline;
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148 } object; /* actual rune object */
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149 };
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150
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151 typedef struct rune_dynarr_type
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152 {
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153 Dynarr_declare (struct rune);
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154 } rune_dynarr;
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155
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156 /* These must have distinct values. Note that the ordering actually
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157 represents priority levels. TEXT has the lowest priority level. */
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158 enum display_type
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159 {
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160 TEXT,
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161 LEFT_OUTSIDE_MARGIN,
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162 LEFT_INSIDE_MARGIN,
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163 RIGHT_INSIDE_MARGIN,
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164 RIGHT_OUTSIDE_MARGIN,
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165 OVERWRITE
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166 };
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167
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168 /* A display block represents a run of text on a single line.
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169 Apparently there is only one display block per line for each
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170 of the types listed in `enum display_type'.
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171
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172 A display block consists mostly of an array of runes, one per
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173 atomic display element (printable character, pixmap, etc.). */
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174
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175 /* #### Yuckity yuckity yuck yuck yuck yuck yuck!!
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176
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177 Chuck, I think you should redo this. It should not be the
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178 responsibility of the device-specific code to worry about
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179 the different faces. The generic stuff in redisplay-output.c
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180 should glump things up into sub-blocks, each of which
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181 corresponds to a single pixmap or a single run of text in
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182 the same font.
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183
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184 It might still make sense for the device-specific output routine
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185 to get passed an entire display line. That way, it can make
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186 calls to XDrawText() (which draws multiple runs of single-font
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187 data) instead of XDrawString(). The reason for this is to
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188 reduce the amount of X traffic, which will help things significantly
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189 on a slow line. */
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190
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191 struct display_block
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192 {
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193 enum display_type type; /* type of display block */
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194
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195 int start_pos; /* starting pixel position of block */
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196 int end_pos; /* ending pixel position of block */
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197
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198 rune_dynarr *runes; /* Dynamic array of runes */
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199 };
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200
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201 typedef struct display_block_dynarr_type
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202 {
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203 Dynarr_declare (struct display_block);
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204 } display_block_dynarr;
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205
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206 typedef struct layout_bounds_type
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207 {
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208 int left_out;
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209 int left_in;
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210 int left_white;
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211 int right_white;
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212 int right_in;
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213 int right_out;
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214 } layout_bounds;
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215
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216 struct glyph_block
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217 {
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218 Lisp_Object glyph;
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219 Lisp_Object extent;
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220 /* The rest are only used by margin routines. */
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221 face_index findex;
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222 int active;
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223 int width;
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224 };
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225
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226 typedef struct glyph_block_dynarr_type
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227 {
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228 Dynarr_declare (struct glyph_block);
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229 } glyph_block_dynarr;
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230
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231 struct display_line
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232 {
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233 short ypos; /* vertical position in pixels
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234 of the baseline for this line. */
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235 unsigned short ascent, descent; /* maximum values for this line.
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236 The ascent is the number of
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237 pixels above the baseline, and
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238 the descent is the number of
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239 pixels below the baseline.
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240 The descent includes the baseline
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241 pixel-row itself, I think. */
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242 unsigned short clip; /* amount of bottom of line to clip
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243 in pixels.*/
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244 Bufpos bufpos; /* first buffer position on line */
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245 Bufpos end_bufpos; /* last buffer position on line */
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246 Charcount offset; /* adjustment to bufpos vals */
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247 Charcount num_chars; /* # of chars on line
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248 including expansion of tabs
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249 and control chars */
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250 int cursor_elt; /* rune block of TEXT display
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251 block cursor is at or -1 */
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2
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252 char used_prop_data; /* can't incrementally update if line
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0
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253 used propogation data */
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254
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255 layout_bounds bounds; /* line boundary positions */
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256
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257 char modeline; /* t if this line is a modeline */
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258
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259 /* Dynamic array of display blocks */
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260 display_block_dynarr *display_blocks;
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261
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262 /* Dynamic arrays of left and right glyph blocks */
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263 glyph_block_dynarr *left_glyphs;
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264 glyph_block_dynarr *right_glyphs;
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265 };
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266
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267 typedef struct display_line_dynarr_type
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268 {
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269 Dynarr_declare (struct display_line);
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270 } display_line_dynarr;
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271
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272 /* It could be argued that the following two structs belong in
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273 extents.h, but they're only used by redisplay and it simplifies
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274 the header files to put them here. */
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275
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276 typedef struct extent_dynarr_type
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277 {
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278 Dynarr_declare (struct extent *);
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279 } extent_dynarr;
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280
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281 struct font_metric_info
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282 {
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283 int width;
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284 int height; /* always ascent + descent; for convenience */
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285 int ascent;
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286 int descent;
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287
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288 char proportional_p;
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289 };
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290
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291 /* NOTE NOTE NOTE: Currently the positions in an extent fragment
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292 structure are Bytind's, not Bufpos's. This could change. */
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293
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294 struct extent_fragment
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295 {
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296 Lisp_Object object; /* buffer or string */
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297 struct frame *frm;
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298 Bytind pos, end;
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299 extent_dynarr *extents;
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300 glyph_block_dynarr *begin_glyphs, *end_glyphs;
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2
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301 unsigned int invisible:1;
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302 unsigned int invisible_ellipses:1;
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303 unsigned int previously_invisible:1;
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304 unsigned int invisible_ellipses_already_displayed:1;
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0
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305 };
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306
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307
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308 /*************************************************************************/
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309 /* change flags */
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310 /*************************************************************************/
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311
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312 /* Quick flags to signal redisplay. redisplay() sets them all to 0
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313 when it finishes. If none of them are set when it starts, it
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314 assumes that nothing needs to be done. Functions that make a change
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315 that is (potentially) visible on the screen should set the
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316 appropriate flag.
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317
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318 If any of these flags are set, redisplay will look more carefully
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319 to see if anything has really changed. */
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320
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321 /* non-nil if the contents of a buffer have changed since the last time
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322 redisplay completed */
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323 extern int buffers_changed;
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324 extern int buffers_changed_set;
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325
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326 /* Nonzero if head_clip or tail_clip of a buffer has changed
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327 since last redisplay that finished */
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328 extern int clip_changed;
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329 extern int clip_changed_set;
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330
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331 /* non-nil if any extent has changed since the last time redisplay completed */
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332 extern int extents_changed;
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333 extern int extents_changed_set;
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334
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335 /* non-nil if any face has changed since the last time redisplay completed */
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336 extern int faces_changed;
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337
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338 /* Nonzero means one or more frames have been marked as garbaged */
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339 extern int frame_changed;
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340
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341 /* True if an icon is in need of updating somewhere. */
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342 extern int icon_changed;
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343 extern int icon_changed_set;
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344
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345 /* True if a menubar is in need of updating somewhere. */
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346 extern int menubar_changed;
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347 extern int menubar_changed_set;
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348
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349 /* true iff we should redraw the modelines on the next redisplay */
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350 extern int modeline_changed;
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351 extern int modeline_changed_set;
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352
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353 /* non-nil if point has changed in some buffer since the last time
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354 redisplay completed */
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355 extern int point_changed;
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356 extern int point_changed_set;
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357
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358 /* non-nil if some frame has changed its size */
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359 extern int size_changed;
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360
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361 /* non-nil if some device has signaled that it wants to change size */
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362 extern int asynch_device_change_pending;
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363
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364 /* non-nil if any toolbar has changed */
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365 extern int toolbar_changed;
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366 extern int toolbar_changed_set;
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367
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368 /* non-nil if any window has changed since the last time redisplay completed */
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369 extern int windows_changed;
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370
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371 /* non-nil if any frame's window structure has changed since the last
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372 time redisplay completed */
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373 extern int windows_structure_changed;
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374
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375 /* These macros can be relatively expensive. Since they are often
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376 called numerous times between each call to redisplay, we keep track
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377 if each has already been called and don't bother doing most of the
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378 work if it is currently set. */
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379
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380 #define MARK_TYPE_CHANGED(object) do { \
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381 if (!object##_changed_set) { \
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382 Lisp_Object _devcons_, _concons_; \
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383 DEVICE_LOOP_NO_BREAK (_devcons_, _concons_) \
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384 { \
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385 Lisp_Object _frmcons_; \
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386 struct device *_d_ = XDEVICE (XCONS (_devcons_)->car); \
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387 DEVICE_FRAME_LOOP (_frmcons_, _d_) \
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388 { \
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389 struct frame *_f_ = XFRAME (XCONS (_frmcons_)->car); \
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390 _f_->object##_changed = 1; \
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391 _f_->modiff++; \
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392 } \
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393 _d_->object##_changed = 1; \
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394 } \
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395 object##_changed = 1; \
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396 object##_changed_set = 1; } \
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397 } while (0)
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398
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399 #define MARK_BUFFERS_CHANGED MARK_TYPE_CHANGED (buffers)
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400 #define MARK_CLIP_CHANGED MARK_TYPE_CHANGED (clip)
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401 #define MARK_EXTENTS_CHANGED MARK_TYPE_CHANGED (extents)
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402 #define MARK_ICON_CHANGED MARK_TYPE_CHANGED (icon)
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403 #define MARK_MENUBAR_CHANGED MARK_TYPE_CHANGED (menubar)
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404 #define MARK_MODELINE_CHANGED MARK_TYPE_CHANGED (modeline)
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405 #define MARK_POINT_CHANGED MARK_TYPE_CHANGED (point)
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406 #define MARK_TOOLBAR_CHANGED MARK_TYPE_CHANGED (toolbar)
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407
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408 /* Anytime a console, device or frame is added or deleted we need to reset
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409 these flags. */
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410 #define RESET_CHANGED_SET_FLAGS \
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411 do { \
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412 buffers_changed_set = 0; \
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413 clip_changed_set = 0; \
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414 extents_changed_set = 0; \
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415 icon_changed_set = 0; \
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416 menubar_changed_set = 0; \
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417 modeline_changed_set = 0; \
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418 point_changed_set = 0; \
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419 toolbar_changed_set = 0; \
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420 } while (0)
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421
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422
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423 /*************************************************************************/
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424 /* redisplay global variables */
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425 /*************************************************************************/
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426
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427 /* redisplay structre used by various utility routines. */
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428 extern display_line_dynarr *cmotion_display_lines;
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429
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430 /* nil or a symbol naming the window system
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431 under which emacs is running
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432 ('x is the only current possibility) */
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433 extern Lisp_Object Vwindow_system;
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434
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435 /* Nonzero means truncate lines in all windows less wide than the frame. */
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436 extern int truncate_partial_width_windows;
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437
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438 /* Nonzero if we're in a display critical section. */
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439 extern int in_display;
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440
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441 /* Nonzero means no need to redraw the entire frame on resuming
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442 a suspended Emacs. This is useful on terminals with multiple pages,
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443 where one page is used for Emacs and another for all else. */
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444 extern int no_redraw_on_reenter;
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445
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446 /* Nonzero means flash the frame instead of ringing the bell. */
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447 extern int visible_bell;
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448
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449 /* Thickness of shadow border around 3D modelines. */
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450 extern Lisp_Object Vmodeline_shadow_thickness;
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451
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452 /* Scroll if point lands on the bottom line and that line is partially
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453 clipped. */
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454 extern int scroll_on_clipped_lines;
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455
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456 extern Lisp_Object Vglobal_mode_string;
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457
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2
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458 /* The following two variables are defined in emacs.c and are used
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0
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459 to convey information discovered on the command line way early
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460 (before *anything* is initialized). */
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461
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462 /* If non-zero, a window-system was specified on the command line.
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463 Defined in emacs.c. */
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464 extern int display_arg;
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465
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466 /* Type of display specified. Defined in emacs.c. */
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467 extern char *display_use;
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468
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469
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470 /*************************************************************************/
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471 /* redisplay exported functions */
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472 /*************************************************************************/
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473
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474 int redisplay_text_width_string (struct window *w, int findex,
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475 Bufbyte *nonreloc, Lisp_Object reloc,
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476 Bytecount offset, Bytecount len);
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477 int redisplay_frame_text_width_string (struct frame *f,
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478 Lisp_Object face,
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479 Bufbyte *nonreloc,
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480 Lisp_Object reloc,
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481 Bytecount offset, Bytecount len);
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482 void redisplay (void);
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483 struct display_block *get_display_block_from_line (struct display_line *dl,
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484 enum display_type type);
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485 layout_bounds calculate_display_line_boundaries (struct window *w,
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486 int modeline);
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487 Bufpos point_at_center (struct window *w, int type, Bufpos start,
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488 Bufpos point);
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489 int line_at_center (struct window *w, int type, Bufpos start, Bufpos point);
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490 int window_half_pixpos (struct window *w);
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491 void redisplay_echo_area (void);
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492 void free_display_structs (struct window_mirror *mir);
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2
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493 Bufbyte *generate_formatted_string (struct window *w, Lisp_Object format_str,
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494 Lisp_Object result_str, face_index findex,
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495 int type);
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0
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496 int real_current_modeline_height (struct window *w);
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497 int pixel_to_glyph_translation (struct frame *f, int x_coord,
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498 int y_coord, int *col, int *row,
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499 int *obj_x, int *obj_y,
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500 struct window **w, Bufpos *bufpos,
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501 Bufpos *closest, Charcount *modeline_closest,
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502 Lisp_Object *obj1, Lisp_Object *obj2);
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503 void glyph_to_pixel_translation (struct window *w, int char_x,
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504 int char_y, int *pix_x, int *pix_y);
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505 void mark_redisplay (void (*) (Lisp_Object));
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506 int point_in_line_start_cache (struct window *w, Bufpos point,
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507 int min_past);
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508 int point_would_be_visible (struct window *w, Bufpos startp,
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509 Bufpos point);
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510 Bufpos start_of_last_line (struct window *w, Bufpos startp);
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511 Bufpos end_of_last_line (struct window *w, Bufpos startp);
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512 Bufpos start_with_line_at_pixpos (struct window *w, Bufpos point,
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513 int pixpos);
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514 Bufpos start_with_point_on_display_line (struct window *w, Bufpos point,
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|
515 int line);
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516 int redisplay_variable_changed (Lisp_Object sym, Lisp_Object *val,
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517 Lisp_Object in_object, int flags);
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518 void redisplay_glyph_changed (Lisp_Object glyph, Lisp_Object property,
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519 Lisp_Object locale);
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520
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|
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521 #ifdef MEMORY_USAGE_STATS
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|
|
522 int compute_display_line_dynarr_usage (display_line_dynarr *dyn,
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|
|
523 struct overhead_stats *ovstats);
|
|
|
524 int compute_line_start_cache_dynarr_usage (line_start_cache_dynarr *dyn,
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|
|
525 struct overhead_stats *ovstats);
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|
|
526 #endif
|
|
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527
|
|
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528
|
|
|
529 /* defined in redisplay-output.c */
|
|
|
530 int get_next_display_block (layout_bounds bounds,
|
|
|
531 display_block_dynarr *dba, int start_pos,
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|
|
532 int *next_start);
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|
|
533 void redisplay_clear_bottom_of_window (struct window *w,
|
|
|
534 display_line_dynarr *ddla,
|
|
|
535 int min_start, int max_end);
|
|
|
536 void redisplay_update_line (struct window *w, int first_line,
|
|
|
537 int last_line, int update_values);
|
|
|
538 void redisplay_output_window (struct window *w);
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|
|
539 int redisplay_move_cursor (struct window *w, Bufpos new_point,
|
|
|
540 int no_output_end);
|
|
|
541 void redisplay_redraw_cursor (struct frame *f, int run_begin_end_meths);
|
|
|
542 void output_display_line (struct window *w, display_line_dynarr *cdla,
|
|
|
543 display_line_dynarr *ddla, int line,
|
|
|
544 int force_start, int force_end);
|
|
|
545
|
|
|
546 #endif /* _XEMACS_REDISPLAY_H_ */
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