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0
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1 /* Window definitions for XEmacs.
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2 Copyright (C) 1985, 1986, 1992, 1993, 1994, 1995
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3 Free Software Foundation, Inc.
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4 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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5 Copyright (C) 1995, 1996 Ben Wing.
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6 Copyright (C) 1996 Chuck Thompson.
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7
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8 This file is part of XEmacs.
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9
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10 XEmacs is free software; you can redistribute it and/or modify it
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11 under the terms of the GNU General Public License as published by the
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12 Free Software Foundation; either version 2, or (at your option) any
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13 later version.
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14
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15 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with XEmacs; see the file COPYING. If not, write to
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22 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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23 Boston, MA 02111-1307, USA. */
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24
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25 /* Synched up with: FSF 19.30. */
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26
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27 #ifndef _XEMACS_WINDOW_H_
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28 #define _XEMACS_WINDOW_H_
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29
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30 #include "redisplay.h"
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31 #include "scrollbar.h"
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32
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33 /* All windows in use are arranged into a tree, with pointers up and down.
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34
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35 Windows that are leaves of the tree are actually displayed
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36 and show the contents of buffers. Windows that are not leaves
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37 are used for representing the way groups of leaf windows are
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38 arranged on the frame. Leaf windows never become non-leaves.
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39 They are deleted only by calling delete-window on them (but
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40 this can be done implicitly). Combination windows can be created
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41 and deleted at any time.
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42
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43 A leaf window has a non-nil buffer field, and also
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44 has markers in its start and pointm fields. Non-leaf windows
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45 have nil in these fields.
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46
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47 Non-leaf windows are either vertical or horizontal combinations.
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48
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49 A vertical combination window has children that are arranged on the frame
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50 one above the next. Its vchild field points to the uppermost child.
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51 The parent field of each of the children points to the vertical
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52 combination window. The next field of each child points to the
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53 child below it, or is nil for the lowest child. The prev field
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54 of each child points to the child above it, or is nil for the
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55 highest child.
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56
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57 A horizontal combination window has children that are side by side.
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58 Its hchild field points to the leftmost child. In each child
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59 the next field points to the child to the right and the prev field
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60 points to the child to the left.
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61
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62 The children of a vertical combination window may be leaf windows
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63 or horizontal combination windows. The children of a horizontal
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64 combination window may be leaf windows or vertical combination windows.
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65
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66 At the top of the tree are two windows which have nil as parent.
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67 The second of these is minibuf_window. The first one manages all
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68 the frame area that is not minibuffer, and is called the root window.
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69 Different windows can be the root at different times;
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70 initially the root window is a leaf window, but if more windows
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71 are created then that leaf window ceases to be root and a newly
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72 made combination window becomes root instead.
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73
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74 In any case, on screens which have an ordinary window and a
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75 minibuffer, prev of the minibuf window is the root window and next of
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76 the root window is the minibuf window. On minibufferless screens or
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77 minibuffer-only screens, the root window and the minibuffer window are
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78 one and the same, so its prev and next members are nil.
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79
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80 A dead window has the `dead' flag set on it. Note that unlike other
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81 dead objects, dead windows can be made live again through restoring a
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82 window configuration. This means that the values in a dead window
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83 need to be preserved, except for those that are reconstructed by from
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84 the window configuration. */
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85
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86 struct window
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87 {
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88 struct lcrecord_header header;
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89
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90 /* The frame this window is on. */
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91 Lisp_Object frame;
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92 /* t if this window is a minibuffer window. */
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93 Lisp_Object mini_p;
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94 /* Following child (to right or down) at same level of tree */
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95 Lisp_Object next;
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96 /* Preceding child (to left or up) at same level of tree */
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97 Lisp_Object prev;
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98 /* First child of this window. */
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99 /* vchild is used if this is a vertical combination,
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100 hchild if this is a horizontal combination. */
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101 Lisp_Object hchild, vchild;
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102 /* The window this one is a child of. */
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103 Lisp_Object parent;
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104
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105 /* The upper left corner coordinates of this window,
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106 as integers (pixels) relative to upper left corner of frame = 0, 0 */
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107 int pixel_left;
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108 int pixel_top;
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109 /* The size of the window (in pixels) */
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110 int pixel_height;
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111 int pixel_width;
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112
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113 /* The buffer displayed in this window */
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114 /* Of the fields vchild, hchild and buffer, only one is non-nil. */
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115 Lisp_Object buffer;
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116 /* A marker pointing to where in the text to start displaying */
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117 /* need one for each set of display structures */
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118 Lisp_Object start[3];
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119 /* A marker pointing to where in the text point is in this window,
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120 used only when the window is not selected.
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121 This exists so that when multiple windows show one buffer
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122 each one can have its own value of point. */
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123 /* need one for each set of display structures */
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124 Lisp_Object pointm[3];
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125 /* A marker pointing to where in the text the scrollbar is pointing */
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126 Lisp_Object sb_point;
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127 /* Number of columns display within the window is scrolled to the left. */
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128 int hscroll;
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129 /* Number saying how recently window was selected */
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130 Lisp_Object use_time;
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131 /* text.modified of displayed buffer as of last time display completed */
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132 Lisp_Object last_modified[3];
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133 /* Value of point at that time */
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134 Lisp_Object last_point[3];
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135 /* Value of start at that time */
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136 Lisp_Object last_start[3];
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137 /* buf.face_change as of last time display completed */
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138 Lisp_Object last_facechange[3];
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139
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140 /* face cache elements correct for this window and its current buffer */
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141 face_cachel_dynarr *face_cachels;
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142 /* glyph cache elements correct for this window and its current buffer */
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143 glyph_cachel_dynarr *glyph_cachels;
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144
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145
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146 /* List of starting positions for display lines. Only valid if
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147 buffer has not changed. */
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148 line_start_cache_dynarr *line_start_cache;
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149 Lisp_Object line_cache_last_updated;
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150 int line_cache_validation_override;
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151
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152 /* Length of longest line currently displayed. Used to control the
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153 width of the horizontal scrollbars. */
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154 int max_line_len;
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155
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156 /* Frame coords of point at that time */
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157 int last_point_x[3];
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158 int last_point_y[3];
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159
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160 /* Number of characters in buffer past bottom of window,
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161 as of last redisplay that finished. */
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162 /* need one for each set of display structures */
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163 int window_end_pos[3];
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164
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165 /* Non-nil means window is marked as dedicated. */
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166 Lisp_Object dedicated;
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167
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168 #if 0 /* FSFmacs */
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169 /* The column number currently displayed in this window's mode line,
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170 or nil if column numbers are not being displayed. */
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171 Lisp_Object column_number_displayed;
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172 #endif
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173 /* If redisplay in this window goes beyond this buffer position,
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174 must run the redisplay-end-trigger-functions. */
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175 Lisp_Object redisplay_end_trigger;
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176
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177 /* Set by redisplay to the last position seen. This is used
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178 to implement the redisplay-end-trigger-functions. */
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179 Bufpos last_redisplay_pos;
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180
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181 /* specifier values cached in the struct window: */
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182
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183 /* Display-table to use for displaying chars in this window. */
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184 Lisp_Object display_table;
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185 /* Thickness of modeline shadow, in pixels. If negative, draw
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186 as recessed. */
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187 Lisp_Object modeline_shadow_thickness;
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188 /* Non-nil means to display a modeline for the buffer. */
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189 Lisp_Object has_modeline_p;
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190 #ifdef HAVE_SCROLLBARS
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191 /* Width of vertical scrollbars. */
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192 Lisp_Object scrollbar_width;
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193 /* Height of horizontal scrollbars. */
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194 Lisp_Object scrollbar_height;
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195 /* Pointer to use for vertical and horizontal scrollbars. */
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196 Lisp_Object scrollbar_pointer;
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197 #endif
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198 #ifdef HAVE_TOOLBARS
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199 /* Toolbar specification for each of the four positions.
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200 This is not a size hog because the value here is not copied,
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201 and will be shared with the specs in the specifier. */
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202 Lisp_Object toolbar[4];
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203 /* Toolbar size for each of the four positions. */
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204 Lisp_Object toolbar_size[4];
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205 /* Toolbar visibility status for each of the four positions. */
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206 Lisp_Object toolbar_visible_p[4];
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207 /* Caption status of toolbar. */
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208 Lisp_Object toolbar_buttons_captioned_p;
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209 /* The following four don't really need to be cached except
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210 that we need to know when they've changed. */
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211 Lisp_Object default_toolbar;
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212 Lisp_Object default_toolbar_width, default_toolbar_height;
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213 Lisp_Object default_toolbar_visible_p;
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214 #endif
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215 Lisp_Object left_margin_width, right_margin_width;
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216 Lisp_Object minimum_line_ascent, minimum_line_descent;
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217 Lisp_Object use_left_overflow, use_right_overflow;
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218 #ifdef HAVE_MENUBARS
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219 /* Visibility of menubar. */
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220 Lisp_Object menubar_visible_p;
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221 #endif
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222 Lisp_Object text_cursor_visible_p;
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223
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224 /* one-bit flags: */
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225
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226 /* marker used when restoring a window configuration */
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227 unsigned int config_mark :1;
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228 /* Non-zero means window was dead. */
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229 unsigned int dead :1;
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230 /* Non-zero means next redisplay must use the value of start
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231 set up for it in advance. Set by scrolling commands. */
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232 unsigned int force_start :1;
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233 /* Non-zero means must regenerate modeline of this window */
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234 unsigned int redo_modeline :1;
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235 /* Non-zero means current value of `start'
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236 was the beginning of a line when it was chosen. */
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237 unsigned int start_at_line_beg :1;
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238 /* new redisplay flag */
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239 unsigned int windows_changed :1;
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240 unsigned int shadow_thickness_changed :1;
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241 };
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242
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243 #define CURRENT_DISP 0
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244 #define DESIRED_DISP 1
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245 #define CMOTION_DISP 2
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246
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247 struct window_mirror
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248 {
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249 /* Frame this mirror is on. */
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250 struct frame *frame;
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251
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252 /* Following child (to right or down) at same level of tree */
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253 struct window_mirror *next;
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254
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255 /* There is no prev field because we never traverse this structure
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256 backwards. Same goes for the parent field. */
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257
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258 /* First child of this window. */
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259 /* vchild is used if this is a vertical combination,
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260 hchild if this is a horizontal combination. */
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261 struct window_mirror *hchild, *vchild;
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262
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263 /* Dynamic array of display lines */
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264 display_line_dynarr *current_display_lines;
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265 display_line_dynarr *desired_display_lines;
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266
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267 /* Buffer current_display_lines represent. */
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268 struct buffer *buffer;
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269
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270 #ifdef HAVE_SCROLLBARS
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271 /* Scrollbars associated with window, if any. */
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272 struct scrollbar_instance *scrollbar_vertical_instance;
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273 struct scrollbar_instance *scrollbar_horizontal_instance;
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274 #endif
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275
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276 /* Flag indicating whether a subwindow is currently being displayed. */
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277 unsigned int subwindows_being_displayed :1;
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0
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278
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279 /* Keep track of the truncation status in this window so we can
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280 detect when it has changed. #### Magic variables would be a huge
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281 win here. */
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282 unsigned int truncate_win :1;
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0
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283 };
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284
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285 #ifdef emacs /* some things other than emacs want the structs */
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286
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287 DECLARE_LRECORD (window, struct window);
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288 #define XWINDOW(x) XRECORD (x, window, struct window)
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289 #define XSETWINDOW(x, p) XSETRECORD (x, p, window)
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290 #define WINDOWP(x) RECORDP (x, window)
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291 #define GC_WINDOWP(x) GC_RECORDP (x, window)
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292 #define CHECK_WINDOW(x) CHECK_RECORD (x, window)
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293 #define CONCHECK_WINDOW(x) CONCHECK_RECORD (x, window)
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294
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295 extern Lisp_Object Qwindow_live_p;
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296
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297 #define WINDOW_LIVE_P(x) (!(x)->dead)
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298 #define CHECK_LIVE_WINDOW(x) \
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299 do { CHECK_WINDOW (x); \
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300 if (!WINDOW_LIVE_P (XWINDOW (x))) \
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301 dead_wrong_type_argument (Qwindow_live_p, (x)); \
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302 } while (0)
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303 #define CONCHECK_LIVE_WINDOW(x) \
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304 do { CONCHECK_WINDOW (x); \
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305 if (!WINDOW_LIVE_P (XWINDOW (x))) \
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306 x = wrong_type_argument (Qwindow_live_p, (x)); \
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307 } while (0)
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308
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309 /* 1 if W is a minibuffer window. */
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310 #define MINI_WINDOW_P(W) (!EQ ((W)->mini_p, Qnil))
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311
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312 /* 1 if we are dealing with a parentless window (this includes the
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313 root window on a frame and the minibuffer window; both of these
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314 are siblings). */
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315 #define TOP_LEVEL_WINDOW_P(w) NILP ((w)->parent)
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316
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317 /* Set all redisplay flags indicating a window has changed */
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318 #define MARK_WINDOWS_CHANGED(w) do { \
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319 (w)->windows_changed = 1; \
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320 if (!NILP (w->frame)) \
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321 MARK_FRAME_WINDOWS_CHANGED (XFRAME (w->frame)); \
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322 else \
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323 windows_changed = 1; } while (0)
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324
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325 #define WINDOW_TTY_P(w) FRAME_TTY_P (XFRAME ((w)->frame))
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326 #define WINDOW_X_P(w) FRAME_X_P (XFRAME ((w)->frame))
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327 #define WINDOW_NS_P(w) FRAME_NS_P (XFRAME ((w)->frame))
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328 #define WINDOW_WIN_P(w) FRAME_WIN_P (XFRAME ((w)->frame))
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329
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330 DECLARE_LRECORD (window_configuration, struct window_config);
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331
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332 /* The minibuffer window of the selected frame.
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333 Note that you cannot test for minibufferness of an arbitrary window
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334 by comparing against this; but you can test for minibufferness of
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335 the selected window or of any window that is displayed. */
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336 extern Lisp_Object minibuf_window;
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337
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338 /* Non-nil => window to for C-M-v to scroll
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339 when the minibuffer is selected. */
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340 extern Lisp_Object Vminibuf_scroll_window;
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341
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342 /* Prompt to display in front of the minibuffer contents, or nil */
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343 extern Lisp_Object Vminibuf_prompt;
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344
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345 /* Depth in minibuffer invocations */
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346 extern int minibuf_level;
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347
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348 Lisp_Object allocate_window (void);
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349 int window_char_width (struct window *, int include_margins_p);
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350 int window_char_height (struct window *, int include_gutters_p);
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351 int window_displayed_height (struct window *);
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352 int window_is_leftmost (struct window *w);
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353 int window_is_rightmost (struct window *w);
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354 int window_truncation_on (struct window *w);
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355 int window_needs_vertical_divider (struct window *);
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356 int window_scrollbar_width (struct window *w);
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357 int window_scrollbar_height (struct window *w);
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358 int window_modeline_height (struct window *w);
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359 int window_left_margin_width (struct window *w);
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360 int window_right_margin_width (struct window *w);
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361 int window_top_gutter_height (struct window *w);
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362 int window_bottom_gutter_height (struct window *w);
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363 int window_left_gutter_width (struct window *w, int modeline);
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364 int window_right_gutter_width (struct window *w, int modeline);
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365 int window_bottom_toolbar_height (struct window *w);
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366
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367 void delete_all_subwindows (struct window *w);
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368 void set_window_pixheight (Lisp_Object window, int pixheight,
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369 int nodelete);
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370 void set_window_pixwidth (Lisp_Object window, int pixwidth,
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371 int nodelete);
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372 void window_scroll (Lisp_Object window, Lisp_Object n, int direction,
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373 Error_behavior errb);
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374 int buffer_window_count (struct buffer *b, struct frame *f);
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375 int buffer_window_mru (struct window *w);
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376 void check_frame_size (struct frame *frame, int *rows, int *cols);
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377 void mark_windows_in_use (Lisp_Object window, int mark);
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378 struct window *decode_window (Lisp_Object window);
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379 struct window *find_window_by_pixel_pos (unsigned int pix_x,
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380 unsigned int pix_y,
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381 Lisp_Object win);
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382
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383 /* new functions to handle the window mirror */
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384 void free_window_mirror (struct window_mirror *mir);
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385 Lisp_Object real_window (struct window_mirror *mir, int no_abort);
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386 struct window_mirror *find_window_mirror (struct window *w);
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387 display_line_dynarr *window_display_lines (struct window *w, int);
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388 struct buffer *window_display_buffer (struct window *w);
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389 void set_window_display_buffer (struct window *w, struct buffer *b);
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390 void update_frame_window_mirror (struct frame *f);
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391
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392 int map_windows (struct frame *f,
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393 int (*mapfun) (struct window *w, void *closure),
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394 void *closure);
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395 void some_window_value_changed (Lisp_Object specifier, struct window *w,
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396 Lisp_Object oldval);
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397
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398 #define WINDOW_FRAME(w) ((w)->frame)
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399 #define WINDOW_BUFFER(w) ((w)->buffer)
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400 #define WINDOW_DEVICE(w) FRAME_DEVICE (XFRAME (WINDOW_FRAME (w)))
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401 #define WINDOW_CONSOLE(w) DEVICE_CONSOLE (XDEVICE (WINDOW_DEVICE (w)))
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402
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403 /* XEmacs window size and positioning macros. */
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404 #define WINDOW_TOP(w) ((w)->pixel_top)
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405 #define WINDOW_TEXT_TOP(w) (WINDOW_TOP (w) + window_top_gutter_height (w))
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406 #define WINDOW_BOTTOM(w) ((w)->pixel_top + (w)->pixel_height)
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407 #define WINDOW_TEXT_BOTTOM(w) (WINDOW_BOTTOM (w) - window_bottom_gutter_height (w))
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408 #define WINDOW_LEFT(w) ((w)->pixel_left)
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409 #define WINDOW_TEXT_LEFT(w) (WINDOW_LEFT (w) + window_left_gutter_width (w, 0))
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410 #define WINDOW_MODELINE_LEFT(w) \
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411 (WINDOW_LEFT (w) + window_left_gutter_width (w, 1))
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412 #define WINDOW_RIGHT(w) ((w)->pixel_left + (w)->pixel_width)
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413 #define WINDOW_TEXT_RIGHT(w) \
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414 (WINDOW_RIGHT (w) - window_right_gutter_width (w, 0))
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415 #define WINDOW_MODELINE_RIGHT(w) \
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416 (WINDOW_RIGHT (w) - window_right_gutter_width (w, 1))
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417
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418 #define WINDOW_HEIGHT(w) ((w)->pixel_height)
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419 #define WINDOW_TEXT_HEIGHT(w) (WINDOW_TEXT_BOTTOM (w) - WINDOW_TEXT_TOP (w))
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420 #define WINDOW_WIDTH(w) ((w)->pixel_width)
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421 #define WINDOW_TEXT_WIDTH(w) (WINDOW_TEXT_RIGHT (w) - WINDOW_TEXT_LEFT (w))
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422
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423 #define WINDOW_HAS_MODELINE_P(w) (!NILP (w->has_modeline_p))
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424
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425 #define MODELINE_OFF_SHADOW_THICKNESS_ADJUSTED(win) \
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426 abs ((!WINDOW_HAS_MODELINE_P (win) \
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427 ? ((XINT (win->modeline_shadow_thickness) > 1) \
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428 ? XINT (win->modeline_shadow_thickness) - 1 \
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429 : ((XINT (win->modeline_shadow_thickness) < -1) \
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430 ? XINT (win->modeline_shadow_thickness) + 1 \
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431 : XINT (win->modeline_shadow_thickness))) \
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432 : XINT (win->modeline_shadow_thickness)))
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433
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434 #define MODELINE_SHADOW_THICKNESS(win) \
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435 (MODELINE_OFF_SHADOW_THICKNESS_ADJUSTED (win) > 10 \
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436 ? 10 \
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437 : MODELINE_OFF_SHADOW_THICKNESS_ADJUSTED (win))
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438
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439 #endif /* emacs */
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440
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441 #endif /* _XEMACS_WINDOW_H_ */
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