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