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