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0
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1 /* Generic scrollbar implementation.
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2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1995 Free Software Foundation, Inc.
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4 Copyright (C) 1995 Sun Microsystems, Inc.
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5 Copyright (C) 1995 Darrell Kindred <dkindred+@cmu.edu>.
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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24 /* Synched up with: Not in FSF. */
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25
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26 /* This file has been Mule-ized. */
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27
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28 #include <config.h>
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29 #include "lisp.h"
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30
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31 #include "buffer.h"
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32 #include "commands.h"
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33 #include "scrollbar.h"
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34 #include "device.h"
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35 #include "frame.h"
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36 #include "glyphs.h"
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37 #include "window.h"
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38
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39 Lisp_Object Qinit_scrollbar_from_resources;
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40
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41 Lisp_Object Qscrollbar_line_up;
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42 Lisp_Object Qscrollbar_line_down;
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43 Lisp_Object Qscrollbar_page_up;
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44 Lisp_Object Qscrollbar_page_down;
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45 Lisp_Object Qscrollbar_to_top;
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46 Lisp_Object Qscrollbar_to_bottom;
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47 Lisp_Object Qscrollbar_vertical_drag;
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48
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49 Lisp_Object Qscrollbar_char_left;
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50 Lisp_Object Qscrollbar_char_right;
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51 Lisp_Object Qscrollbar_page_left;
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52 Lisp_Object Qscrollbar_page_right;
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53 Lisp_Object Qscrollbar_to_left;
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54 Lisp_Object Qscrollbar_to_right;
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55 Lisp_Object Qscrollbar_horizontal_drag;
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56
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57 #define DEFAULT_SCROLLBAR_WIDTH 15
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58 #define DEFAULT_SCROLLBAR_HEIGHT 15
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59
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282
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60 /* Width and height of the scrollbar. */
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0
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61 Lisp_Object Vscrollbar_width;
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282
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62 Lisp_Object Vscrollbar_height;
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0
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63
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282
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64 /* Scrollbar visibility specifiers */
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65 Lisp_Object Vhorizontal_scrollbar_visible_p;
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66 Lisp_Object Vvertical_scrollbar_visible_p;
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67
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68 /* Scrollbar location specifiers */
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69 Lisp_Object Vscrollbar_on_left_p;
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70 Lisp_Object Vscrollbar_on_top_p;
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0
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71
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72 Lisp_Object Vscrollbar_pointer_glyph;
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73
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280
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74 EXFUN (Fcenter_to_window_line, 2);
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75
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0
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76 static void update_scrollbar_instance (struct window *w, int vertical,
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77 struct scrollbar_instance *instance);
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78
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79
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80 static void
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81 free_scrollbar_instance (struct scrollbar_instance *instance,
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82 struct frame *frame)
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83 {
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84 if (!instance)
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85 return;
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86 else
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87 {
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88 struct device *d = XDEVICE (frame->device);
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89
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90 MAYBE_DEVMETH (d, free_scrollbar_instance, (instance));
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91 xfree (instance);
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92 }
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93 }
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94
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95 static void
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96 free_window_mirror_scrollbars (struct window_mirror *mir)
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97 {
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98 struct frame *f = mir->frame;
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99 free_scrollbar_instance (mir->scrollbar_vertical_instance, f);
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100 mir->scrollbar_vertical_instance = 0;
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101 free_scrollbar_instance (mir->scrollbar_horizontal_instance, f);
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102 mir->scrollbar_horizontal_instance = 0;
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103 }
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104
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105 static struct window_mirror *
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106 free_scrollbars_loop (Lisp_Object window, struct window_mirror *mir)
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107 {
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108 struct window_mirror *retval = NULL;
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109
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110 while (mir)
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111 {
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112 struct scrollbar_instance *vinst = mir->scrollbar_vertical_instance;
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113 struct scrollbar_instance *hinst = mir->scrollbar_horizontal_instance;
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114 struct frame *f;
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115
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116 assert (!NILP (window));
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117 f = XFRAME (XWINDOW (window)->frame);
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118
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119 if (mir->vchild)
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120 {
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121 retval = free_scrollbars_loop (XWINDOW (window)->vchild,
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122 mir->vchild);
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123 }
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124 else if (mir->hchild)
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125 {
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126 retval = free_scrollbars_loop (XWINDOW (window)->hchild,
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127 mir->hchild);
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128 }
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129
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130 if (retval != NULL)
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131 return retval;
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132
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133 if (hinst || vinst)
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134 free_window_mirror_scrollbars (mir);
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135
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136 mir = mir->next;
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137 window = XWINDOW (window)->next;
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138 }
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139
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140 return NULL;
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141 }
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142
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143 /* Destroy all scrollbars associated with FRAME. Only called from
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144 delete_frame_internal.
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145 */
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146 #define FREE_FRAME_SCROLLBARS_INTERNAL(cache) \
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147 do { \
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148 while (FRAME_SB_##cache (f)) \
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149 { \
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150 struct scrollbar_instance *tofree = FRAME_SB_##cache (f); \
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151 FRAME_SB_##cache (f) = FRAME_SB_##cache (f)->next; \
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152 tofree->next = NULL; \
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153 free_scrollbar_instance (tofree, f); \
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154 } \
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155 } while (0)
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156
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157 void
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158 free_frame_scrollbars (struct frame *f)
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159 {
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160 if (!HAS_FRAMEMETH_P (f, create_scrollbar_instance))
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161 return;
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162
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163 if (f->mirror_dirty)
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164 update_frame_window_mirror (f);
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165
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166 free_scrollbars_loop (f->root_window, f->root_mirror);
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167
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168 FREE_FRAME_SCROLLBARS_INTERNAL (VCACHE);
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169 FREE_FRAME_SCROLLBARS_INTERNAL (HCACHE);
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170 }
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171 #undef FREE_FRAME_SCROLLBARS_INTERNAL
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172
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173
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174 static struct scrollbar_instance *
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175 create_scrollbar_instance (struct frame *f, int vertical)
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176 {
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177 struct device *d = XDEVICE (f->device);
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178 struct scrollbar_instance *instance =
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185
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179 xnew_and_zero (struct scrollbar_instance);
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0
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180
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181 MAYBE_DEVMETH (d, create_scrollbar_instance, (f, vertical, instance));
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182
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183 return instance;
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184 }
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185
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186
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187 #define GET_SCROLLBAR_INSTANCE_INTERNAL(cache) \
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188 do { \
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189 if (FRAME_SB_##cache (f)) \
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190 { \
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191 struct scrollbar_instance *retval = FRAME_SB_##cache (f); \
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192 FRAME_SB_##cache (f) = FRAME_SB_##cache (f)->next; \
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193 retval->next = NULL; \
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194 return retval; \
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195 } \
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196 } while (0)
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197
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198 static struct scrollbar_instance *
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199 get_scrollbar_instance (struct frame *f, int vertical)
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200 {
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201 /* Check if there are any available scrollbars already in existence. */
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202 if (vertical)
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203 GET_SCROLLBAR_INSTANCE_INTERNAL (VCACHE);
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204 else
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205 GET_SCROLLBAR_INSTANCE_INTERNAL (HCACHE);
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206
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207 return create_scrollbar_instance (f, vertical);
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208 }
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209 #undef GET_SCROLLBAR_INSTANCE_INTERNAL
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210
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211 #define RELEASE_SCROLLBAR_INSTANCE_INTERNAL(cache) \
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212 do { \
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213 if (!FRAME_SB_##cache (f)) \
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214 { \
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215 instance->next = NULL; \
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216 FRAME_SB_##cache (f) = instance; \
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217 } \
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218 else \
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219 { \
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220 instance->next = FRAME_SB_##cache (f); \
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221 FRAME_SB_##cache (f) = instance; \
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222 } \
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223 } while (0)
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224
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225 static void
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226 release_scrollbar_instance (struct frame *f, int vertical,
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227 struct scrollbar_instance *instance)
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228 {
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229 /* #### should we do "instance->mir = 0;" for safety? */
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230 if (vertical)
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231 RELEASE_SCROLLBAR_INSTANCE_INTERNAL (VCACHE);
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232 else
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233 RELEASE_SCROLLBAR_INSTANCE_INTERNAL (HCACHE);
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234 }
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235 #undef RELEASE_SCROLLBAR_INSTANCE_INTERNAL
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236
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237 #ifdef MEMORY_USAGE_STATS
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238
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239 int
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240 compute_scrollbar_instance_usage (struct device *d,
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241 struct scrollbar_instance *inst,
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242 struct overhead_stats *ovstats)
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243 {
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244 int total = 0;
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245
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246 total += DEVMETH (d, compute_scrollbar_instance_usage, (d, inst, ovstats));
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247
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248 while (inst)
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249 {
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250 total += malloced_storage_size (inst, sizeof (*inst), ovstats);
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251 inst = inst->next;
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252 }
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253
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254 return total;
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255 }
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256
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257 #endif /* MEMORY_USAGE_STATS */
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258
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259 void
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260 update_window_scrollbars (struct window *w, struct window_mirror *mirror,
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261 int active, int horiz_only)
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262 {
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263 struct frame *f = XFRAME (w->frame);
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264 struct device *d = XDEVICE (f->device);
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265
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266 if (!HAS_DEVMETH_P (d, create_scrollbar_instance))
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267 return;
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268
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269 in_display++;
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270
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271 /* It is possible for this to get called from the mirror update
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272 routines. In that case the structure is in an indeterminate
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273 state but we know exactly what struct we are working with. So we
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274 pass it in in that case. We also take advantage of it at some
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275 other points where we know what the mirror struct is. */
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276 if (!mirror)
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277 mirror = find_window_mirror (w);
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278
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279 if (!mirror->scrollbar_vertical_instance && active)
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280 mirror->scrollbar_vertical_instance = get_scrollbar_instance (f, 1);
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281
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282 if (!mirror->scrollbar_horizontal_instance && active)
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283 mirror->scrollbar_horizontal_instance = get_scrollbar_instance (f, 0);
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284
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285 if (!horiz_only && mirror->scrollbar_vertical_instance)
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286 {
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287 int size = (active ? window_scrollbar_width (w) : 0);
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288 struct scrollbar_instance *instance;
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289
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290 instance = mirror->scrollbar_vertical_instance;
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291 instance->scrollbar_is_active = active;
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292 instance->mirror = mirror;
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293
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294 if (active && size)
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295 update_scrollbar_instance (w, 1, instance);
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296 MAYBE_DEVMETH (d, update_scrollbar_instance_status,
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297 (w, active, size, instance));
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298
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299 if (!active)
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300 {
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301 release_scrollbar_instance (f, 1, instance);
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302 mirror->scrollbar_vertical_instance = NULL;
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303 }
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304 }
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305
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306 if (mirror->scrollbar_horizontal_instance)
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307 {
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308 int size = (active ? window_scrollbar_height (w) : 0);
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309 struct scrollbar_instance *instance;
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310
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311 instance = mirror->scrollbar_horizontal_instance;
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312 instance->scrollbar_is_active = active;
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313 instance->mirror = mirror;
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314
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315 if (active && size)
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316 update_scrollbar_instance (w, 0, instance);
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317 MAYBE_DEVMETH (d, update_scrollbar_instance_status,
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318 (w, active, size, instance));
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319
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320 if (!active)
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321 {
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322 release_scrollbar_instance (f, 0, instance);
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323 mirror->scrollbar_horizontal_instance = NULL;
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324 }
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325 }
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326
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327 in_display--;
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328 }
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329
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330 void
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331 release_window_mirror_scrollbars (struct window_mirror *mir)
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332 {
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333 struct device *d = XDEVICE (mir->frame->device);
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334
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335 if (!HAS_DEVMETH_P (d, create_scrollbar_instance))
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336 return;
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337
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338 if (mir->scrollbar_vertical_instance)
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339 {
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340 release_scrollbar_instance (mir->frame, 1,
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341 mir->scrollbar_vertical_instance);
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342 MAYBE_DEVMETH (d, release_scrollbar_instance,
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343 (mir->scrollbar_vertical_instance));
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344 }
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345 mir->scrollbar_vertical_instance = 0;
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346
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347 if (mir->scrollbar_horizontal_instance)
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348 {
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349 release_scrollbar_instance (mir->frame, 0,
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350 mir->scrollbar_horizontal_instance);
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351 MAYBE_DEVMETH (d, release_scrollbar_instance,
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352 (mir->scrollbar_horizontal_instance));
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353 }
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354 mir->scrollbar_horizontal_instance = 0;
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355 }
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356
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357 /* This check needs to be done in the device-specific side. */
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358 #define UPDATE_DATA_FIELD(field, value) \
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359 if (instance->field != value) {\
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360 instance->field = value;\
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361 instance->scrollbar_instance_changed = 1;\
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362 }\
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363
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364 /*
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365 * If w->sb_point is on the top line then return w->sb_point else
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366 * return w->start. If flag, then return beginning point of line
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367 * which w->sb_point lies on.
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368 */
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369 static Bufpos
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370 scrollbar_point (struct window *w, int flag)
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371 {
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372 Bufpos start_pos, end_pos, sb_pos;
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373 Lisp_Object buf;
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374 struct buffer *b;
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375
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376 if (NILP (w->buffer)) /* non-leaf window */
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377 return 0;
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378
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379 start_pos = marker_position (w->start[CURRENT_DISP]);
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380 sb_pos = marker_position (w->sb_point);
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381
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382 if (!flag && sb_pos < start_pos)
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383 return start_pos;
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384
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385 buf = get_buffer (w->buffer, 0);
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386 if (!NILP (buf))
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387 b = XBUFFER (buf);
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388 else
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389 return start_pos;
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390
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391 if (flag)
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392 end_pos = find_next_newline_no_quit (b, sb_pos, -1);
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393 else
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394 end_pos = find_next_newline_no_quit (b, start_pos, 1);
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395
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396 if (flag)
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397 return end_pos;
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398 else if (sb_pos > end_pos)
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399 return start_pos;
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400 else
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401 return sb_pos;
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402 }
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403
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404 /*
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405 * Update a window's horizontal or vertical scrollbar.
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406 */
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407 static void
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408 update_scrollbar_instance (struct window *w, int vertical,
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409 struct scrollbar_instance *instance)
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410 {
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411 struct frame *f = XFRAME (w->frame);
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412 struct device *d = XDEVICE (f->device);
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413 struct buffer *b = XBUFFER (w->buffer);
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414 Bufpos start_pos, end_pos, sb_pos;
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102
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415 int scrollbar_width = window_scrollbar_width (w);
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0
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416 int scrollbar_height = window_scrollbar_height (w);
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417
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418 int new_line_increment = -1, new_page_increment = -1;
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419 int new_minimum = -1, new_maximum = -1;
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|
|
420 int new_slider_size = -1, new_slider_position = -1;
|
|
|
421 int new_width = -1, new_height = -1, new_x = -1, new_y = -1;
|
|
|
422 struct window *new_window = 0; /* kludge city */
|
|
|
423
|
|
|
424 end_pos = BUF_Z (b) - w->window_end_pos[CURRENT_DISP];
|
|
|
425 sb_pos = scrollbar_point (w, 0);
|
|
|
426 start_pos = sb_pos;
|
|
|
427
|
|
|
428 /* The end position must be strictly greater than the start
|
|
|
429 position, at least for the Motify scrollbar. It shouldn't hurt
|
|
|
430 anything for other scrollbar implementations. */
|
|
|
431 if (end_pos <= start_pos)
|
|
|
432 end_pos = start_pos + 1;
|
|
|
433
|
|
|
434 if (vertical)
|
|
|
435 {
|
|
|
436 new_height = WINDOW_TEXT_HEIGHT (w);
|
|
|
437 new_width = scrollbar_width;
|
|
|
438 }
|
|
|
439 else
|
|
|
440 {
|
|
|
441 new_height = scrollbar_height;
|
|
|
442 new_width = WINDOW_TEXT_WIDTH (w);
|
|
|
443 }
|
|
|
444
|
|
|
445 /* If the height and width are not greater than 0, then later on the
|
|
|
446 Motif widgets will bitch and moan. */
|
|
|
447 if (new_height <= 0)
|
|
|
448 new_height = 1;
|
|
|
449 if (new_width <= 0)
|
|
|
450 new_width = 1;
|
|
|
451
|
|
|
452 assert (instance->mirror && XWINDOW (real_window(instance->mirror, 0)) == w);
|
|
|
453
|
|
|
454 /* Only character-based scrollbars are implemented at the moment.
|
|
|
455 Line-based will be implemented in the future. */
|
|
|
456
|
|
|
457 instance->scrollbar_is_active = 1;
|
|
|
458 new_line_increment = 1;
|
|
|
459 new_page_increment = 1;
|
|
|
460
|
|
102
|
461 /* We used to check for inhibit_scrollbar_slider_size_change here,
|
|
|
462 but that seems bogus. */
|
|
|
463 {
|
|
|
464 int x_offset, y_offset;
|
|
0
|
465
|
|
102
|
466 /* Scrollbars are always the farthest from the text area. */
|
|
|
467 if (vertical)
|
|
|
468 {
|
|
282
|
469 x_offset = (!NILP (w->scrollbar_on_left_p)
|
|
102
|
470 ? WINDOW_LEFT (w)
|
|
284
|
471 : (WINDOW_RIGHT (w) - scrollbar_width
|
|
|
472 - (window_needs_vertical_divider (w)
|
|
|
473 ? window_divider_width (w) : 0)));
|
|
102
|
474 y_offset = WINDOW_TEXT_TOP (w) + f->scrollbar_y_offset;
|
|
|
475 }
|
|
|
476 else
|
|
|
477 {
|
|
|
478 x_offset = WINDOW_TEXT_LEFT (w);
|
|
|
479 y_offset = f->scrollbar_y_offset +
|
|
282
|
480 (!NILP (w->scrollbar_on_top_p)
|
|
102
|
481 ? WINDOW_TOP (w)
|
|
|
482 : WINDOW_TEXT_BOTTOM (w) + window_bottom_toolbar_height (w));
|
|
|
483 }
|
|
0
|
484
|
|
102
|
485 new_x = x_offset;
|
|
|
486 new_y = y_offset;
|
|
|
487 }
|
|
0
|
488
|
|
|
489 /* A disabled scrollbar has its slider sized to the entire height of
|
|
|
490 the scrollbar. Currently the minibuffer scrollbar is
|
|
|
491 disabled. */
|
|
|
492 if (!MINI_WINDOW_P (w) && vertical)
|
|
|
493 {
|
|
102
|
494 if (!DEVMETH_OR_GIVEN (d, inhibit_scrollbar_slider_size_change, (), 0))
|
|
0
|
495 {
|
|
|
496 new_minimum = BUF_BEGV (b);
|
|
|
497 new_maximum = max (BUF_ZV (b), new_minimum + 1);
|
|
|
498 new_slider_size = min ((end_pos - start_pos),
|
|
|
499 (new_maximum - new_minimum));
|
|
|
500 new_slider_position = sb_pos;
|
|
|
501 new_window = w;
|
|
|
502 }
|
|
|
503 }
|
|
|
504 else if (!MINI_WINDOW_P (w))
|
|
|
505 {
|
|
|
506 /* The minus one is to account for the truncation glyph. */
|
|
|
507 int wcw = window_char_width (w, 0) - 1;
|
|
|
508 int max_width, max_slide;
|
|
|
509
|
|
|
510 if (w->max_line_len < wcw)
|
|
|
511 {
|
|
|
512 max_width = 1;
|
|
|
513 max_slide = 1;
|
|
|
514 wcw = 1;
|
|
|
515 }
|
|
|
516 else
|
|
|
517 {
|
|
|
518 max_width = w->max_line_len + 2;
|
|
|
519 max_slide = max_width - wcw;
|
|
|
520 }
|
|
|
521
|
|
|
522 new_minimum = 0;
|
|
|
523 new_maximum = max_width;
|
|
|
524 new_slider_size = wcw;
|
|
|
525 new_slider_position = min (w->hscroll, max_slide);
|
|
|
526 }
|
|
102
|
527 else /* MINI_WINDOW_P (w) */
|
|
0
|
528 {
|
|
|
529 new_minimum = 1;
|
|
|
530 new_maximum = 2;
|
|
|
531 new_slider_size = 1;
|
|
|
532 new_slider_position = 1;
|
|
|
533 instance->scrollbar_is_active = 0;
|
|
|
534 }
|
|
|
535
|
|
|
536 DEVMETH (d, update_scrollbar_instance_values, (w, instance,
|
|
|
537 new_line_increment,
|
|
|
538 new_page_increment,
|
|
|
539 new_minimum,
|
|
|
540 new_maximum,
|
|
|
541 new_slider_size,
|
|
|
542 new_slider_position,
|
|
|
543 new_width, new_height,
|
|
|
544 new_x, new_y));
|
|
|
545 }
|
|
|
546
|
|
|
547 void
|
|
|
548 init_frame_scrollbars (struct frame *f)
|
|
|
549 {
|
|
|
550 struct device *d = XDEVICE (f->device);
|
|
|
551
|
|
|
552 if (HAS_DEVMETH_P (d, create_scrollbar_instance))
|
|
|
553 {
|
|
280
|
554 int depth = unlock_ghost_specifiers_protected ();
|
|
272
|
555 Lisp_Object frame;
|
|
0
|
556 XSETFRAME (frame, f);
|
|
|
557 call_critical_lisp_code (XDEVICE (FRAME_DEVICE (f)),
|
|
|
558 Qinit_scrollbar_from_resources,
|
|
|
559 frame);
|
|
276
|
560 unbind_to (depth, Qnil);
|
|
0
|
561 }
|
|
|
562 }
|
|
|
563
|
|
|
564 void
|
|
|
565 init_device_scrollbars (struct device *d)
|
|
|
566 {
|
|
|
567 if (HAS_DEVMETH_P (d, create_scrollbar_instance))
|
|
|
568 {
|
|
280
|
569 int depth = unlock_ghost_specifiers_protected ();
|
|
272
|
570 Lisp_Object device;
|
|
0
|
571 XSETDEVICE (device, d);
|
|
|
572 call_critical_lisp_code (d,
|
|
|
573 Qinit_scrollbar_from_resources,
|
|
|
574 device);
|
|
276
|
575 unbind_to (depth, Qnil);
|
|
0
|
576 }
|
|
|
577 }
|
|
|
578
|
|
|
579 void
|
|
|
580 init_global_scrollbars (struct device *d)
|
|
|
581 {
|
|
|
582 if (HAS_DEVMETH_P (d, create_scrollbar_instance))
|
|
|
583 {
|
|
280
|
584 int depth = unlock_ghost_specifiers_protected ();
|
|
0
|
585 call_critical_lisp_code (d,
|
|
|
586 Qinit_scrollbar_from_resources,
|
|
|
587 Qglobal);
|
|
276
|
588 unbind_to (depth, Qnil);
|
|
0
|
589 }
|
|
|
590 }
|
|
|
591
|
|
284
|
592 static void
|
|
|
593 vertical_scrollbar_changed_in_window (Lisp_Object specifier,
|
|
|
594 struct window *w,
|
|
|
595 Lisp_Object oldval)
|
|
|
596 {
|
|
|
597 /* Hold on your cerebella guys. If we always show the dividers,
|
|
|
598 changing scrollbar affects only how the text and scrollbar are
|
|
|
599 laid out in the window. If we do not want the dividers to show up
|
|
|
600 always, then we mark more drastic change, because changing
|
|
|
601 divider appearane changes lotta things. Although we actually need
|
|
|
602 to do this only if the scrollbar has appeared or disappeared
|
|
|
603 completely at either window edge, we do this always, as users
|
|
|
604 usually do not reposition scrollbars 200 times a second or so. Do
|
|
|
605 you? */
|
|
298
|
606 if (NILP (w->vertical_divider_always_visible_p))
|
|
284
|
607 MARK_FRAME_WINDOWS_STRUCTURE_CHANGED (XFRAME (WINDOW_FRAME (w)));
|
|
|
608 else
|
|
|
609 MARK_WINDOWS_CHANGED (w);
|
|
|
610 }
|
|
|
611
|
|
0
|
612 /* This function is called as a result of a change to the
|
|
|
613 `scrollbar-pointer' glyph. */
|
|
|
614 static void
|
|
|
615 scrollbar_pointer_changed_in_window (Lisp_Object specifier, struct window *w,
|
|
|
616 Lisp_Object oldval)
|
|
|
617 {
|
|
|
618 struct frame *f = XFRAME (WINDOW_FRAME (w));
|
|
|
619
|
|
|
620 if (f->init_finished)
|
|
|
621 MAYBE_FRAMEMETH (f, scrollbar_pointer_changed_in_window, (w));
|
|
|
622 }
|
|
|
623
|
|
|
624 /* ####
|
|
|
625
|
|
|
626 All of the following stuff is functions that handle scrollbar
|
|
|
627 actions. All of it should be moved into Lisp. This may require
|
|
|
628 adding some badly-needed primitives. */
|
|
|
629
|
|
|
630 /********** vertical scrollbar stuff **********/
|
|
|
631
|
|
|
632 /*
|
|
|
633 * If the original point is still visible, put the cursor back there.
|
|
|
634 * Otherwise, when scrolling down stick it at the beginning of the
|
|
|
635 * first visible line and when scrolling up stick it at the beginning
|
|
|
636 * of the last visible line.
|
|
|
637 */
|
|
|
638
|
|
|
639 /* #### This function should be moved into Lisp */
|
|
|
640 static void
|
|
|
641 scrollbar_reset_cursor (Lisp_Object win, Lisp_Object orig_pt)
|
|
|
642 {
|
|
|
643 /* When this function is called we know that start is already
|
|
|
644 accurate. We know this because either set-window-start or
|
|
|
645 recenter was called immediately prior to it being called. */
|
|
|
646 Lisp_Object buf;
|
|
|
647 Bufpos start_pos = XINT (Fwindow_start (win));
|
|
|
648 Bufpos ptint = XINT (orig_pt);
|
|
|
649 struct window *w = XWINDOW (win);
|
|
|
650 int selected = ((w == XWINDOW (Fselected_window (XFRAME (w->frame)->device)))
|
|
|
651 ? 1
|
|
|
652 : 0);
|
|
|
653
|
|
|
654 buf = Fwindow_buffer (win);
|
|
|
655 if (NILP (buf))
|
|
|
656 return; /* the window was deleted out from under us */
|
|
|
657
|
|
|
658 if (ptint < XINT (Fwindow_start (win)))
|
|
|
659 {
|
|
|
660 if (selected)
|
|
|
661 Fgoto_char (make_int (start_pos), buf);
|
|
|
662 else
|
|
|
663 Fset_window_point (win, make_int (start_pos));
|
|
|
664 }
|
|
|
665 else if (!point_would_be_visible (XWINDOW (win), start_pos, ptint))
|
|
|
666 {
|
|
|
667 Fmove_to_window_line (make_int (-1), win);
|
|
|
668
|
|
|
669 if (selected)
|
|
|
670 Fbeginning_of_line (Qnil, buf);
|
|
|
671 else
|
|
|
672 {
|
|
|
673 /* #### Taken from forward-line. */
|
|
|
674 Bufpos pos;
|
|
|
675
|
|
|
676 pos = find_next_newline (XBUFFER (buf),
|
|
|
677 marker_position (w->pointm[CURRENT_DISP]),
|
|
|
678 -1);
|
|
|
679 Fset_window_point (win, make_int (pos));
|
|
|
680 }
|
|
|
681 }
|
|
|
682 else
|
|
|
683 {
|
|
|
684 if (selected)
|
|
|
685 Fgoto_char (orig_pt, buf);
|
|
|
686 else
|
|
|
687 Fset_window_point (win, orig_pt);
|
|
|
688 }
|
|
|
689 }
|
|
|
690
|
|
20
|
691 DEFUN ("scrollbar-line-up", Fscrollbar_line_up, 1, 1, 0, /*
|
|
0
|
692 Function called when the line-up arrow on the scrollbar is clicked.
|
|
|
693 This is the little arrow at the top of the scrollbar. One argument, the
|
|
|
694 scrollbar's window. You can advise this function to change the scrollbar
|
|
|
695 behavior.
|
|
20
|
696 */
|
|
|
697 (window))
|
|
0
|
698 {
|
|
|
699 CHECK_LIVE_WINDOW (window);
|
|
|
700 window_scroll (window, make_int (1), -1, ERROR_ME_NOT);
|
|
|
701 zmacs_region_stays = 1;
|
|
|
702 return Qnil;
|
|
|
703 }
|
|
|
704
|
|
20
|
705 DEFUN ("scrollbar-line-down", Fscrollbar_line_down, 1, 1, 0, /*
|
|
0
|
706 Function called when the line-down arrow on the scrollbar is clicked.
|
|
|
707 This is the little arrow at the bottom of the scrollbar. One argument, the
|
|
|
708 scrollbar's window. You can advise this function to change the scrollbar
|
|
|
709 behavior.
|
|
20
|
710 */
|
|
|
711 (window))
|
|
0
|
712 {
|
|
|
713 CHECK_LIVE_WINDOW (window);
|
|
|
714 window_scroll (window, make_int (1), 1, ERROR_ME_NOT);
|
|
|
715 zmacs_region_stays = 1;
|
|
|
716 return Qnil;
|
|
|
717 }
|
|
|
718
|
|
20
|
719 DEFUN ("scrollbar-page-up", Fscrollbar_page_up, 1, 1, 0, /*
|
|
185
|
720 Function called when the user gives the "page-up" scrollbar action.
|
|
272
|
721 \(The way this is done can vary from scrollbar to scrollbar.) One argument,
|
|
0
|
722 a cons containing the scrollbar's window and a value (#### document me!
|
|
|
723 This value is nil for Motif/Lucid scrollbars and a number for Athena
|
|
|
724 scrollbars). You can advise this function to change the scrollbar
|
|
|
725 behavior.
|
|
20
|
726 */
|
|
|
727 (object))
|
|
0
|
728 {
|
|
|
729 Lisp_Object window = Fcar (object);
|
|
|
730
|
|
|
731 CHECK_LIVE_WINDOW (window);
|
|
|
732 /* Motif and Athena scrollbars behave differently, but in accordance
|
|
|
733 with their standard behaviors. It is not possible to hide the
|
|
|
734 differences down in lwlib because knowledge of XEmacs buffer and
|
|
|
735 cursor motion routines is necessary. */
|
|
82
|
736 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID) || \
|
|
225
|
737 defined (LWLIB_SCROLLBARS_ATHENA3D) || defined(HAVE_MS_WINDOWS)
|
|
0
|
738 window_scroll (window, Qnil, -1, ERROR_ME_NOT);
|
|
|
739 #else /* Athena */
|
|
|
740 {
|
|
|
741 Bufpos bufpos;
|
|
|
742 Lisp_Object value = Fcdr (object);
|
|
|
743
|
|
|
744 CHECK_INT (value);
|
|
|
745 Fmove_to_window_line (Qzero, window);
|
|
|
746 /* can't use Fvertical_motion() because it moves the buffer point
|
|
|
747 rather than the window's point.
|
|
|
748
|
|
|
749 #### It does? Why does it take a window argument then? */
|
|
|
750 bufpos = vmotion (XWINDOW (window), XINT (Fwindow_point (window)),
|
|
|
751 XINT (value), 0);
|
|
|
752 Fset_window_point (window, make_int (bufpos));
|
|
280
|
753 Fcenter_to_window_line (Qzero, window);
|
|
0
|
754 }
|
|
|
755 #endif /* Athena */
|
|
|
756 zmacs_region_stays = 1;
|
|
|
757 return Qnil;
|
|
|
758 }
|
|
|
759
|
|
20
|
760 DEFUN ("scrollbar-page-down", Fscrollbar_page_down, 1, 1, 0, /*
|
|
185
|
761 Function called when the user gives the "page-down" scrollbar action.
|
|
272
|
762 \(The way this is done can vary from scrollbar to scrollbar.) One argument,
|
|
0
|
763 a cons containing the scrollbar's window and a value (#### document me!
|
|
|
764 This value is nil for Motif/Lucid scrollbars and a number for Athena
|
|
|
765 scrollbars). You can advise this function to change the scrollbar
|
|
|
766 behavior.
|
|
20
|
767 */
|
|
|
768 (object))
|
|
0
|
769 {
|
|
|
770 Lisp_Object window = Fcar (object);
|
|
|
771
|
|
|
772 CHECK_LIVE_WINDOW (window);
|
|
|
773 /* Motif and Athena scrollbars behave differently, but in accordance
|
|
|
774 with their standard behaviors. It is not possible to hide the
|
|
|
775 differences down in lwlib because knowledge of XEmacs buffer and
|
|
|
776 cursor motion routines is necessary. */
|
|
82
|
777 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID) || \
|
|
225
|
778 defined (LWLIB_SCROLLBARS_ATHENA3D) || defined (HAVE_MS_WINDOWS)
|
|
0
|
779 window_scroll (window, Qnil, 1, ERROR_ME_NOT);
|
|
|
780 #else /* Athena */
|
|
|
781 {
|
|
|
782 Lisp_Object value = Fcdr (object);
|
|
|
783 CHECK_INT (value);
|
|
|
784 Fmove_to_window_line (value, window);
|
|
280
|
785 Fcenter_to_window_line (Qzero, window);
|
|
0
|
786 }
|
|
|
787 #endif /* Athena */
|
|
|
788 zmacs_region_stays = 1;
|
|
|
789 return Qnil;
|
|
|
790 }
|
|
|
791
|
|
20
|
792 DEFUN ("scrollbar-to-top", Fscrollbar_to_top, 1, 1, 0, /*
|
|
185
|
793 Function called when the user invokes the "to-top" scrollbar action.
|
|
102
|
794 The way this is done can vary from scrollbar to scrollbar, but
|
|
|
795 C-button1 on the up-arrow is very common. One argument, the
|
|
|
796 scrollbar's window. You can advise this function to change the
|
|
0
|
797 scrollbar behavior.
|
|
20
|
798 */
|
|
|
799 (window))
|
|
0
|
800 {
|
|
102
|
801 Lisp_Object orig_pt = Fwindow_point (window);
|
|
0
|
802 Fset_window_point (window, Fpoint_min (Fwindow_buffer (window)));
|
|
280
|
803 Fcenter_to_window_line (Qzero, window);
|
|
0
|
804 scrollbar_reset_cursor (window, orig_pt);
|
|
|
805 zmacs_region_stays = 1;
|
|
|
806 return Qnil;
|
|
|
807 }
|
|
|
808
|
|
20
|
809 DEFUN ("scrollbar-to-bottom", Fscrollbar_to_bottom, 1, 1, 0, /*
|
|
185
|
810 Function called when the user invokes the "to-bottom" scrollbar action.
|
|
102
|
811 The way this is done can vary from scrollbar to scrollbar, but
|
|
|
812 C-button1 on the down-arrow is very common. One argument, the
|
|
|
813 scrollbar's window. You can advise this function to change the
|
|
0
|
814 scrollbar behavior.
|
|
20
|
815 */
|
|
|
816 (window))
|
|
0
|
817 {
|
|
102
|
818 Lisp_Object orig_pt = Fwindow_point (window);
|
|
0
|
819 Fset_window_point (window, Fpoint_max (Fwindow_buffer (window)));
|
|
280
|
820 Fcenter_to_window_line (make_int (-3), window);
|
|
0
|
821 scrollbar_reset_cursor (window, orig_pt);
|
|
|
822 zmacs_region_stays = 1;
|
|
|
823 return Qnil;
|
|
|
824 }
|
|
|
825
|
|
20
|
826 DEFUN ("scrollbar-vertical-drag", Fscrollbar_vertical_drag, 1, 1, 0, /*
|
|
102
|
827 Function called when the user drags the vertical scrollbar slider.
|
|
0
|
828 One argument, a cons containing the scrollbar's window and a value
|
|
2
|
829 between point-min and point-max. You can advise this function to
|
|
|
830 change the scrollbar behavior.
|
|
20
|
831 */
|
|
|
832 (object))
|
|
0
|
833 {
|
|
|
834 Bufpos start_pos;
|
|
|
835 Lisp_Object orig_pt;
|
|
|
836 Lisp_Object window = Fcar (object);
|
|
|
837 Lisp_Object value = Fcdr (object);
|
|
|
838
|
|
|
839 orig_pt = Fwindow_point (window);
|
|
|
840 Fset_marker (XWINDOW (window)->sb_point, value, Fwindow_buffer (window));
|
|
|
841 start_pos = scrollbar_point (XWINDOW (window), 1);
|
|
|
842 Fset_window_start (window, make_int (start_pos), Qnil);
|
|
|
843 scrollbar_reset_cursor (window, orig_pt);
|
|
82
|
844 Fsit_for(Qzero, Qnil);
|
|
0
|
845 zmacs_region_stays = 1;
|
|
|
846 return Qnil;
|
|
|
847 }
|
|
|
848
|
|
20
|
849 DEFUN ("scrollbar-set-hscroll", Fscrollbar_set_hscroll, 2, 2, 0, /*
|
|
272
|
850 Set WINDOW's hscroll position to VALUE.
|
|
0
|
851 This ensures that VALUE is in the proper range for the horizontal scrollbar.
|
|
20
|
852 */
|
|
|
853 (window, value))
|
|
0
|
854 {
|
|
|
855 struct window *w;
|
|
|
856 int hscroll, wcw, max_len;
|
|
|
857
|
|
|
858 CHECK_LIVE_WINDOW (window);
|
|
|
859 if (!EQ (value, Qmax))
|
|
|
860 CHECK_INT (value);
|
|
|
861
|
|
|
862 w = XWINDOW (window);
|
|
|
863 wcw = window_char_width (w, 0) - 1;
|
|
102
|
864 /* ### We should be able to scroll further right as long as there is
|
|
|
865 a visible truncation glyph. This calculation for max is bogus. */
|
|
|
866 max_len = w->max_line_len + 2;
|
|
0
|
867
|
|
|
868 if (EQ (value, Qmax) || (XINT (value) > (max_len - wcw)))
|
|
|
869 hscroll = max_len - wcw;
|
|
|
870 else
|
|
|
871 hscroll = XINT (value);
|
|
|
872
|
|
|
873 /* Can't allow this out of set-window-hscroll's acceptable range. */
|
|
227
|
874 /* #### What hell on the earth this code limits scroll size to the
|
|
371
|
875 machine-dependant SHORT size? -- kkm */
|
|
0
|
876 if (hscroll < 0)
|
|
|
877 hscroll = 0;
|
|
227
|
878 else if (hscroll >= (1 << (SHORTBITS - 1)) - 1)
|
|
0
|
879 hscroll = (1 << (SHORTBITS - 1)) - 1;
|
|
|
880
|
|
|
881 if (hscroll != w->hscroll)
|
|
|
882 Fset_window_hscroll (window, make_int (hscroll));
|
|
|
883
|
|
|
884 return Qnil;
|
|
|
885 }
|
|
|
886
|
|
|
887
|
|
|
888 /************************************************************************/
|
|
|
889 /* initialization */
|
|
|
890 /************************************************************************/
|
|
|
891
|
|
|
892 void
|
|
|
893 syms_of_scrollbar (void)
|
|
|
894 {
|
|
|
895 defsymbol (&Qscrollbar_line_up, "scrollbar-line-up");
|
|
|
896 defsymbol (&Qscrollbar_line_down, "scrollbar-line-down");
|
|
|
897 defsymbol (&Qscrollbar_page_up, "scrollbar-page-up");
|
|
|
898 defsymbol (&Qscrollbar_page_down, "scrollbar-page-down");
|
|
|
899 defsymbol (&Qscrollbar_to_top, "scrollbar-to-top");
|
|
|
900 defsymbol (&Qscrollbar_to_bottom, "scrollbar-to-bottom");
|
|
|
901 defsymbol (&Qscrollbar_vertical_drag, "scrollbar-vertical-drag");
|
|
185
|
902
|
|
0
|
903 defsymbol (&Qscrollbar_char_left, "scrollbar-char-left");
|
|
|
904 defsymbol (&Qscrollbar_char_right, "scrollbar-char-right");
|
|
|
905 defsymbol (&Qscrollbar_page_left, "scrollbar-page-left");
|
|
|
906 defsymbol (&Qscrollbar_page_right, "scrollbar-page-right");
|
|
|
907 defsymbol (&Qscrollbar_to_left, "scrollbar-to-left");
|
|
|
908 defsymbol (&Qscrollbar_to_right, "scrollbar-to-right");
|
|
|
909 defsymbol (&Qscrollbar_horizontal_drag, "scrollbar-horizontal-drag");
|
|
|
910
|
|
|
911 defsymbol (&Qinit_scrollbar_from_resources, "init-scrollbar-from-resources");
|
|
|
912
|
|
|
913 /* #### All these functions should be moved into Lisp.
|
|
|
914 See comment above. */
|
|
20
|
915 DEFSUBR (Fscrollbar_line_up);
|
|
|
916 DEFSUBR (Fscrollbar_line_down);
|
|
|
917 DEFSUBR (Fscrollbar_page_up);
|
|
|
918 DEFSUBR (Fscrollbar_page_down);
|
|
|
919 DEFSUBR (Fscrollbar_to_top);
|
|
|
920 DEFSUBR (Fscrollbar_to_bottom);
|
|
|
921 DEFSUBR (Fscrollbar_vertical_drag);
|
|
0
|
922
|
|
20
|
923 DEFSUBR (Fscrollbar_set_hscroll);
|
|
0
|
924 }
|
|
|
925
|
|
|
926 void
|
|
|
927 vars_of_scrollbar (void)
|
|
|
928 {
|
|
|
929 DEFVAR_LISP ("scrollbar-pointer-glyph", &Vscrollbar_pointer_glyph /*
|
|
|
930 *The shape of the mouse-pointer when over a scrollbar.
|
|
|
931 This is a glyph; use `set-glyph-image' to change it.
|
|
|
932 If unspecified in a particular domain, the window-system-provided
|
|
|
933 default pointer is used.
|
|
|
934 */ );
|
|
|
935
|
|
|
936 Fprovide (intern ("scrollbar"));
|
|
|
937 }
|
|
|
938
|
|
|
939 void
|
|
|
940 specifier_vars_of_scrollbar (void)
|
|
|
941 {
|
|
|
942 DEFVAR_SPECIFIER ("scrollbar-width", &Vscrollbar_width /*
|
|
|
943 *Width of vertical scrollbars.
|
|
|
944 This is a specifier; use `set-specifier' to change it.
|
|
|
945 */ );
|
|
276
|
946 Vscrollbar_width = make_magic_specifier (Qnatnum);
|
|
0
|
947 set_specifier_fallback
|
|
|
948 (Vscrollbar_width,
|
|
|
949 list1 (Fcons (Qnil, make_int (DEFAULT_SCROLLBAR_WIDTH))));
|
|
|
950 set_specifier_caching (Vscrollbar_width,
|
|
|
951 slot_offset (struct window,
|
|
|
952 scrollbar_width),
|
|
284
|
953 vertical_scrollbar_changed_in_window,
|
|
0
|
954 slot_offset (struct frame,
|
|
|
955 scrollbar_width),
|
|
282
|
956 frame_size_slipped);
|
|
0
|
957
|
|
|
958 DEFVAR_SPECIFIER ("scrollbar-height", &Vscrollbar_height /*
|
|
|
959 *Height of horizontal scrollbars.
|
|
|
960 This is a specifier; use `set-specifier' to change it.
|
|
|
961 */ );
|
|
276
|
962 Vscrollbar_height = make_magic_specifier (Qnatnum);
|
|
0
|
963 set_specifier_fallback
|
|
|
964 (Vscrollbar_height,
|
|
|
965 list1 (Fcons (Qnil, make_int (DEFAULT_SCROLLBAR_HEIGHT))));
|
|
|
966 set_specifier_caching (Vscrollbar_height,
|
|
|
967 slot_offset (struct window,
|
|
|
968 scrollbar_height),
|
|
|
969 some_window_value_changed,
|
|
|
970 slot_offset (struct frame,
|
|
|
971 scrollbar_height),
|
|
282
|
972 frame_size_slipped);
|
|
|
973
|
|
|
974 DEFVAR_SPECIFIER ("horizontal-scrollbar-visible-p", &Vhorizontal_scrollbar_visible_p /*
|
|
|
975 *Whether the horizontal scrollbar is visible.
|
|
|
976 This is a specifier; use `set-specifier' to change it.
|
|
|
977 */ );
|
|
|
978 Vhorizontal_scrollbar_visible_p = Fmake_specifier (Qboolean);
|
|
|
979 set_specifier_fallback (Vhorizontal_scrollbar_visible_p,
|
|
|
980 list1 (Fcons (Qnil, Qt)));
|
|
|
981 set_specifier_caching (Vhorizontal_scrollbar_visible_p,
|
|
|
982 slot_offset (struct window,
|
|
|
983 horizontal_scrollbar_visible_p),
|
|
|
984 some_window_value_changed,
|
|
|
985 slot_offset (struct frame,
|
|
|
986 horizontal_scrollbar_visible_p),
|
|
|
987 frame_size_slipped);
|
|
|
988
|
|
|
989 DEFVAR_SPECIFIER ("vertical-scrollbar-visible-p", &Vvertical_scrollbar_visible_p /*
|
|
|
990 *Whether the vertical scrollbar is visible.
|
|
|
991 This is a specifier; use `set-specifier' to change it.
|
|
|
992 */ );
|
|
|
993 Vvertical_scrollbar_visible_p = Fmake_specifier (Qboolean);
|
|
|
994 set_specifier_fallback (Vvertical_scrollbar_visible_p,
|
|
|
995 list1 (Fcons (Qnil, Qt)));
|
|
|
996 set_specifier_caching (Vvertical_scrollbar_visible_p,
|
|
|
997 slot_offset (struct window,
|
|
|
998 vertical_scrollbar_visible_p),
|
|
284
|
999 vertical_scrollbar_changed_in_window,
|
|
282
|
1000 slot_offset (struct frame,
|
|
|
1001 vertical_scrollbar_visible_p),
|
|
|
1002 frame_size_slipped);
|
|
|
1003
|
|
|
1004 DEFVAR_SPECIFIER ("scrollbar-on-left-p", &Vscrollbar_on_left_p /*
|
|
|
1005 *Whether the verical scrollbar is on the left side of window or frame.
|
|
|
1006 This is a specifier; use `set-specifier' to change it.
|
|
|
1007 */ );
|
|
|
1008 Vscrollbar_on_left_p = Fmake_specifier (Qboolean);
|
|
|
1009
|
|
|
1010 {
|
|
|
1011 /* Klugde. Under X, we want athena scrollbars on the left,
|
|
|
1012 while all other scrollbars go on the right by default. */
|
|
|
1013 Lisp_Object fallback = list1 (Fcons (Qnil, Qnil));
|
|
|
1014 #if defined (HAVE_X_WINDOWS) \
|
|
|
1015 && !defined (LWLIB_SCROLLBARS_MOTIF) \
|
|
|
1016 && !defined (LWLIB_SCROLLBARS_LUCID) \
|
|
|
1017 && !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
|
1018
|
|
|
1019 fallback = Fcons (Fcons (list1 (Qx), Qt), fallback);
|
|
|
1020 #endif
|
|
|
1021 set_specifier_fallback (Vscrollbar_on_left_p, fallback);
|
|
|
1022 }
|
|
|
1023
|
|
|
1024 set_specifier_caching (Vscrollbar_on_left_p,
|
|
|
1025 slot_offset (struct window,
|
|
|
1026 scrollbar_on_left_p),
|
|
284
|
1027 vertical_scrollbar_changed_in_window,
|
|
282
|
1028 slot_offset (struct frame,
|
|
|
1029 scrollbar_on_left_p),
|
|
|
1030 frame_size_slipped);
|
|
|
1031
|
|
|
1032 DEFVAR_SPECIFIER ("scrollbar-on-top-p", &Vscrollbar_on_top_p /*
|
|
|
1033 *Whether the verical scrollbar is on the top side of window or frame.
|
|
|
1034 This is a specifier; use `set-specifier' to change it.
|
|
|
1035 */ );
|
|
|
1036 Vscrollbar_on_top_p = Fmake_specifier (Qboolean);
|
|
|
1037 set_specifier_fallback (Vscrollbar_on_top_p,
|
|
|
1038 list1 (Fcons (Qnil, Qnil)));
|
|
|
1039 set_specifier_caching (Vscrollbar_on_top_p,
|
|
|
1040 slot_offset (struct window,
|
|
|
1041 scrollbar_on_top_p),
|
|
|
1042 some_window_value_changed,
|
|
|
1043 slot_offset (struct frame,
|
|
|
1044 scrollbar_on_top_p),
|
|
|
1045 frame_size_slipped);
|
|
0
|
1046 }
|
|
|
1047
|
|
|
1048 void
|
|
|
1049 complex_vars_of_scrollbar (void)
|
|
|
1050 {
|
|
|
1051 Vscrollbar_pointer_glyph = Fmake_glyph_internal (Qpointer);
|
|
|
1052
|
|
|
1053 set_specifier_caching (XGLYPH (Vscrollbar_pointer_glyph)->image,
|
|
|
1054 slot_offset (struct window,
|
|
|
1055 scrollbar_pointer),
|
|
|
1056 scrollbar_pointer_changed_in_window,
|
|
|
1057 0, 0);
|
|
|
1058 }
|
