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428
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1 /* scrollbar implementation -- mswindows interface.
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2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1994 Amdahl Corporation.
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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 #include <config.h>
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27 #include "lisp.h"
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28
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29 #include "console-msw.h"
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617
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30 #include "elhash.h"
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428
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31 #include "events.h"
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32 #include "frame.h"
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617
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33 #include "opaque.h"
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428
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34 #include "scrollbar-msw.h"
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35 #include "scrollbar.h"
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36 #include "specifier.h"
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37 #include "window.h"
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38
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39 /* We use a similar sort of vertical scrollbar drag hack for mswindows
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40 * scrollbars as is used for Motif or Lucid scrollbars under X.
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41 * We do character-based instead of line-based scrolling, which can mean that
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42 * without the hack it is impossible to drag to the end of a buffer. */
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43 #define VERTICAL_SCROLLBAR_DRAG_HACK
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44
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45 static int vertical_drag_in_progress = 0;
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46
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617
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47 /* As long as the HWND is around, the scrollbar instance must be GC-protected.
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48 We have gotten crashes, apparently from trying to access a dead, freed
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49 frame inside of a window mirror pointed to by the scrollbar structure. */
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50 static Lisp_Object Vmswindows_scrollbar_instance_table;
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51
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428
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52 static void
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53 mswindows_create_scrollbar_instance (struct frame *f, int vertical,
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54 struct scrollbar_instance *sb)
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55 {
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56 int orientation;
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617
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57 Lisp_Object ptr;
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442
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58
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428
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59 sb->scrollbar_data = xnew_and_zero (struct mswindows_scrollbar_data);
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442
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60
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428
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61 if (vertical)
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62 orientation = SBS_VERT;
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63 else
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64 orientation = SBS_HORZ;
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442
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65
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428
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66 SCROLLBAR_MSW_HANDLE (sb) =
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546
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67 CreateWindowEx (0, "SCROLLBAR", 0, orientation|WS_CHILD,
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68 CW_USEDEFAULT, CW_USEDEFAULT,
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69 CW_USEDEFAULT, CW_USEDEFAULT,
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70 FRAME_MSWINDOWS_HANDLE (f),
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71 NULL, NULL, NULL);
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72 SCROLLBAR_MSW_INFO (sb).cbSize = sizeof (SCROLLINFO);
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428
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73 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL;
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617
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74 GetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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75 &SCROLLBAR_MSW_INFO (sb));
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76 ptr = make_opaque_ptr (SCROLLBAR_MSW_HANDLE (sb));
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77 Fputhash (ptr, wrap_scrollbar_instance (sb),
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78 Vmswindows_scrollbar_instance_table);
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79 SetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_USERDATA,
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80 (LONG) LISP_TO_VOID (ptr));
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428
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81 }
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82
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83 static void
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84 mswindows_free_scrollbar_instance (struct scrollbar_instance *sb)
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85 {
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617
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86 void *opaque =
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87 (void *) GetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_USERDATA);
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88 Lisp_Object ptr;
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89
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90 VOID_TO_LISP (ptr, opaque);
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91 assert (OPAQUE_PTRP (ptr));
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92 ptr = Fremhash (ptr, Vmswindows_scrollbar_instance_table);
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93 assert (!NILP (ptr));
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428
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94 DestroyWindow (SCROLLBAR_MSW_HANDLE (sb));
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442
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95 if (sb->scrollbar_data)
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428
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96 xfree (sb->scrollbar_data);
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97 }
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98
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99 static void
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611
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100 unshow_that_mofo (void *handle)
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101 {
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102 ShowScrollBar ((HWND) handle, SB_CTL, 0);
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103 }
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104
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105 static void
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428
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106 mswindows_release_scrollbar_instance (struct scrollbar_instance *sb)
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107 {
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611
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108 if (gc_in_progress)
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109 /* #### way bogus! need to remove the offending call.
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110 see mark_redisplay(). */
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111 register_post_gc_action (unshow_that_mofo,
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112 (void *) SCROLLBAR_MSW_HANDLE (sb));
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113 else
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114 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, 0);
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428
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115 SCROLLBAR_MSW_SIZE (sb) = 0;
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116 }
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117
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118 #define UPDATE_POS_FIELD(field) \
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119 if (new_##field >= 0 && SCROLLBAR_MSW_DATA (sb)->field != new_##field) { \
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120 SCROLLBAR_MSW_DATA (sb)->field = new_##field; \
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121 pos_changed = 1; \
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122 }
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123
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124 static void
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125 mswindows_update_scrollbar_instance_values (struct window *w,
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126 struct scrollbar_instance *sb,
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127 int new_line_increment,
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128 int new_page_increment,
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129 int new_minimum, int new_maximum,
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130 int new_slider_size,
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131 int new_slider_position,
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132 int new_scrollbar_width,
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133 int new_scrollbar_height,
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134 int new_scrollbar_x,
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135 int new_scrollbar_y)
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136 {
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137 int pos_changed = 0;
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138 int vert = GetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_STYLE) & SBS_VERT;
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139
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140 #if 0
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141 stderr_out ("[%d, %d], page = %d, pos = %d, inhibit = %d\n", new_minimum, new_maximum,
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142 new_slider_size, new_slider_position,inhibit_slider_size_change);
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143 #endif
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144
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145 /* These might be optimized, but since at least one will change at each
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146 call, it's probably not worth it. */
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147 SCROLLBAR_MSW_INFO (sb).nMin = new_minimum;
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148 SCROLLBAR_MSW_INFO (sb).nMax = new_maximum;
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149 SCROLLBAR_MSW_INFO (sb).nPage = new_slider_size + 1; /* +1 for DISABLENOSCROLL */
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150 SCROLLBAR_MSW_INFO (sb).nPos = new_slider_position;
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151 #ifndef VERTICAL_SCROLLBAR_DRAG_HACK
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152 SCROLLBAR_MSW_INFO (sb).fMask = ((vert && vertical_drag_in_progress)
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153 ? SIF_RANGE | SIF_POS
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154 : SIF_ALL | SIF_DISABLENOSCROLL);
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155 #else
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156 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL | SIF_DISABLENOSCROLL;
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157
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158 /* Ignore XEmacs' requests to update the thumb position and size; they don't
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159 * bear any relation to reality because we're reporting made-up positions */
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160 if (!(vert && vertical_drag_in_progress))
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161 #endif
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162 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb),
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163 TRUE);
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164
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165 UPDATE_POS_FIELD (scrollbar_x);
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166 UPDATE_POS_FIELD (scrollbar_y);
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167 UPDATE_POS_FIELD (scrollbar_width);
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168 UPDATE_POS_FIELD (scrollbar_height);
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169
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442
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170 if (pos_changed)
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428
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171 {
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617
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172 MoveWindow (SCROLLBAR_MSW_HANDLE (sb),
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173 new_scrollbar_x, new_scrollbar_y,
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174 new_scrollbar_width, new_scrollbar_height,
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175 TRUE);
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428
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176 }
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177 }
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178
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179 static void
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180 mswindows_update_scrollbar_instance_status (struct window *w,
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181 int active, int size,
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182 struct scrollbar_instance *sb)
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183 {
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184 if (SCROLLBAR_MSW_SIZE (sb) != size)
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185 {
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186 SCROLLBAR_MSW_SIZE (sb) = size;
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187 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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188 SCROLLBAR_MSW_SIZE (sb));
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189 SCROLLBAR_MSW_INFO(sb).fMask |= SIF_DISABLENOSCROLL;
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190 SetScrollInfo(SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb), TRUE);
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191 }
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192 }
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193
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194 void
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195 mswindows_handle_scrollbar_event (HWND hwnd, int code, int pos)
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196 {
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197 struct frame *f;
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198 Lisp_Object win, frame;
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617
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199 struct scrollbar_instance *sb = 0;
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200 void *v;
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428
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201 SCROLLINFO scrollinfo;
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202 int vert = GetWindowLong (hwnd, GWL_STYLE) & SBS_VERT;
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203 int value;
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204
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617
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205 v = (void *) GetWindowLong (hwnd, GWL_USERDATA);
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206 if (!v)
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546
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207 {
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617
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208 /* apparently this can happen, as it was definitely necessary
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209 to put the check in for sb below (VERTICAL_SCROLLBAR_DRAG_HACK) */
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546
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210 frame = mswindows_find_frame (hwnd);
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211 f = XFRAME (frame);
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212 win = FRAME_SELECTED_WINDOW (f);
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213 }
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214 else
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215 {
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617
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216 Lisp_Object ptr;
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217 VOID_TO_LISP (ptr, v);
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218 assert (OPAQUE_PTRP (ptr));
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219 ptr = Fgethash (ptr, Vmswindows_scrollbar_instance_table, Qnil);
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220 sb = XSCROLLBAR_INSTANCE (ptr);
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546
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221 win = real_window (sb->mirror, 0);
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617
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222 frame = WINDOW_FRAME (XWINDOW (win));
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546
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223 f = XFRAME (frame);
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224 }
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428
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225
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617
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226 /* SB_LINEDOWN == SB_CHARLEFT etc. This is the way they will
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227 always be -- any Windows is binary compatible backward with
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228 old programs. */
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428
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229
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230 switch (code)
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231 {
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232 case SB_LINEDOWN:
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233 mswindows_enqueue_misc_user_event
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234 (frame, vert ? Qscrollbar_line_down : Qscrollbar_char_right, win);
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235 break;
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442
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236
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428
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237 case SB_LINEUP:
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238 mswindows_enqueue_misc_user_event
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239 (frame, vert ? Qscrollbar_line_up : Qscrollbar_char_left, win);
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240 break;
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442
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241
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428
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242 case SB_PAGEDOWN:
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243 mswindows_enqueue_misc_user_event
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244 (win, vert ? Qscrollbar_page_down : Qscrollbar_page_right,
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245 vert ? Fcons (win, Qnil) : win);
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246 break;
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247
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248 case SB_PAGEUP:
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249 mswindows_enqueue_misc_user_event
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250 (frame,
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251 vert ? Qscrollbar_page_up : Qscrollbar_page_left,
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252 vert ? Fcons (win, Qnil) : win);
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253 break;
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442
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254
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428
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255 case SB_BOTTOM:
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256 mswindows_enqueue_misc_user_event
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257 (frame, vert ? Qscrollbar_to_bottom : Qscrollbar_to_right, win);
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258 break;
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259
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260 case SB_TOP:
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261 mswindows_enqueue_misc_user_event
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262 (frame, vert ? Qscrollbar_to_top : Qscrollbar_to_left, win);
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263 break;
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264
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265 case SB_THUMBTRACK:
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266 case SB_THUMBPOSITION:
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267 scrollinfo.cbSize = sizeof(SCROLLINFO);
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268 scrollinfo.fMask = SIF_ALL;
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269 GetScrollInfo (hwnd, SB_CTL, &scrollinfo);
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270 vertical_drag_in_progress = vert;
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271 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
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272 if (vert && (scrollinfo.nTrackPos > scrollinfo.nPos))
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273 /* new buffer position =
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274 * buffer position at start of drag +
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275 * ((text remaining in buffer at start of drag) *
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276 * (amount that the thumb has been moved) /
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277 * (space that remained past end of the thumb at start of drag)) */
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278 value = (int)
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279 (scrollinfo.nPos
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280 + (((double)
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281 (scrollinfo.nMax - scrollinfo.nPos)
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282 * (scrollinfo.nTrackPos - scrollinfo.nPos))
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283 / (scrollinfo.nMax - scrollinfo.nPage - scrollinfo.nPos)))
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284 - 2; /* ensure that the last line doesn't disappear off screen */
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285 else
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286 #endif
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287 value = scrollinfo.nTrackPos;
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288 mswindows_enqueue_misc_user_event
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289 (frame,
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290 vert ? Qscrollbar_vertical_drag : Qscrollbar_horizontal_drag,
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291 Fcons (win, make_int (value)));
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292 break;
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293
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294 case SB_ENDSCROLL:
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295 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
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546
|
296 if (vertical_drag_in_progress && sb)
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428
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297 /* User has just dropped the thumb - finally update it */
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298 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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299 &SCROLLBAR_MSW_INFO (sb), TRUE);
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|
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300 #endif
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301 vertical_drag_in_progress = 0;
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302 break;
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303 }
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|
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304 }
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305
|
|
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306 static int
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|
464
|
307 can_scroll (struct scrollbar_instance* scrollbar)
|
|
428
|
308 {
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|
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309 return scrollbar != NULL
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|
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310 && IsWindowVisible (SCROLLBAR_MSW_HANDLE (scrollbar))
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|
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311 && IsWindowEnabled (SCROLLBAR_MSW_HANDLE (scrollbar));
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|
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312 }
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|
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313
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|
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314 int
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|
464
|
315 mswindows_handle_mousewheel_event (Lisp_Object frame, int keys, int delta,
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|
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316 POINTS where)
|
|
428
|
317 {
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|
442
|
318 int hasVertBar, hasHorzBar; /* Indicates presence of scroll bars */
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|
428
|
319 unsigned wheelScrollLines = 0; /* Number of lines per wheel notch */
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|
464
|
320 Lisp_Object win;
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|
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321 struct window_mirror *mirror;
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|
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322 POINT donde_esta;
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|
428
|
323
|
|
464
|
324 donde_esta.x = where.x;
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|
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325 donde_esta.y = where.y;
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|
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326
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|
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327 ScreenToClient (FRAME_MSWINDOWS_HANDLE (XFRAME (frame)), &donde_esta);
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|
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328
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|
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329 /* Find the window to scroll */
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|
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330 {
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|
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331 int mene, _mene, tekel, upharsin;
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|
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332 Bufpos mens, sana;
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|
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333 Charcount in;
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|
|
334 Lisp_Object corpore, sano;
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|
|
335 struct window *needle_in_haystack;
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|
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336
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|
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337 pixel_to_glyph_translation (XFRAME (frame), donde_esta.x, donde_esta.y,
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|
|
338 &mene, &_mene, &tekel, &upharsin,
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|
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339 &needle_in_haystack,
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|
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340 &mens, &sana, &in, &corpore, &sano);
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|
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341
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|
|
342 if (needle_in_haystack)
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|
|
343 {
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|
|
344 XSETWINDOW (win, needle_in_haystack);
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|
|
345 }
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|
|
346 else
|
|
|
347 {
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|
|
348 win = FRAME_SELECTED_WINDOW (XFRAME (frame));
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|
|
349 needle_in_haystack = XWINDOW (win);
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|
|
350 }
|
|
|
351
|
|
|
352 mirror = find_window_mirror (needle_in_haystack);
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|
|
353 }
|
|
428
|
354
|
|
|
355 /* Check that there is something to scroll */
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|
|
356 hasVertBar = can_scroll (mirror->scrollbar_vertical_instance);
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|
|
357 hasHorzBar = can_scroll (mirror->scrollbar_horizontal_instance);
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|
|
358 if (!hasVertBar && !hasHorzBar)
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|
|
359 return FALSE;
|
|
|
360
|
|
|
361 /* No support for panning and zooming, so ignore */
|
|
|
362 if (keys & (MK_SHIFT | MK_CONTROL))
|
|
|
363 return FALSE;
|
|
|
364
|
|
|
365 /* Get the number of lines per wheel delta */
|
|
|
366 SystemParametersInfo (SPI_GETWHEELSCROLLLINES, 0, &wheelScrollLines, 0);
|
|
|
367
|
|
|
368 /* Calculate the amount to scroll */
|
|
|
369 if (wheelScrollLines == WHEEL_PAGESCROLL)
|
|
|
370 {
|
|
|
371 /* Scroll by a page */
|
|
|
372 Lisp_Object function;
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|
|
373 if (hasVertBar)
|
|
|
374 function = delta > 0 ? Qscrollbar_page_up : Qscrollbar_page_down;
|
|
|
375 else
|
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376 function = delta > 0 ? Qscrollbar_page_left : Qscrollbar_page_right;
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377 mswindows_enqueue_misc_user_event (frame, function, Fcons (win, Qnil));
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378 }
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379 else /* Scroll by a number of lines */
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380 {
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381 /* Calc the number of lines to scroll */
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382 int toScroll = MulDiv (delta, wheelScrollLines, WHEEL_DELTA);
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383
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384 /* Do the scroll */
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385 Lisp_Object function;
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386 if (hasVertBar)
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387 function = delta > 0 ? Qscrollbar_line_up : Qscrollbar_line_down;
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388 else
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389 function = delta > 0 ? Qscrollbar_char_left : Qscrollbar_char_right;
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390 if (toScroll < 0)
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391 toScroll = -toScroll;
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392 while (toScroll--)
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393 mswindows_enqueue_misc_user_event (frame, function, win);
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394 }
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395
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396 return TRUE;
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397 }
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398
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399 #ifdef MEMORY_USAGE_STATS
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400
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401 static int
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402 mswindows_compute_scrollbar_instance_usage (struct device *d,
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403 struct scrollbar_instance *inst,
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404 struct overhead_stats *ovstats)
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405 {
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406 int total = 0;
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407
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|
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408 while (inst)
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|
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409 {
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|
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410 struct mswindows_scrollbar_data *data =
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411 (struct mswindows_scrollbar_data *) inst->scrollbar_data;
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412
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|
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413 total += malloced_storage_size (data, sizeof (*data), ovstats);
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414 inst = inst->next;
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|
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415 }
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416
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417 return total;
|
|
|
418 }
|
|
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419
|
|
|
420 #endif /* MEMORY_USAGE_STATS */
|
|
|
421
|
|
|
422 /************************************************************************/
|
|
|
423 /* Device-specific ghost specifiers initialization */
|
|
|
424 /************************************************************************/
|
|
|
425
|
|
617
|
426 DEFUN ("mswindows-init-scrollbar-metrics", Fmswindows_init_scrollbar_metrics,
|
|
|
427 1, 1, 0, /*
|
|
428
|
428 */
|
|
|
429 (locale))
|
|
|
430 {
|
|
|
431 if (DEVICEP (locale))
|
|
|
432 {
|
|
|
433 add_spec_to_ghost_specifier (Vscrollbar_width,
|
|
|
434 make_int (GetSystemMetrics (SM_CXVSCROLL)),
|
|
|
435 locale, Qmswindows, Qnil);
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|
|
436 add_spec_to_ghost_specifier (Vscrollbar_height,
|
|
|
437 make_int (GetSystemMetrics (SM_CYHSCROLL)),
|
|
|
438 locale, Qmswindows, Qnil);
|
|
|
439 }
|
|
|
440 return Qnil;
|
|
|
441 }
|
|
|
442
|
|
|
443
|
|
|
444 /************************************************************************/
|
|
|
445 /* initialization */
|
|
|
446 /************************************************************************/
|
|
|
447
|
|
|
448 void
|
|
|
449 console_type_create_scrollbar_mswindows (void)
|
|
|
450 {
|
|
|
451 CONSOLE_HAS_METHOD (mswindows, create_scrollbar_instance);
|
|
|
452 CONSOLE_HAS_METHOD (mswindows, free_scrollbar_instance);
|
|
|
453 CONSOLE_HAS_METHOD (mswindows, release_scrollbar_instance);
|
|
|
454 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_values);
|
|
|
455 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_status);
|
|
|
456 /* CONSOLE_HAS_METHOD (mswindows, scrollbar_width_changed_in_frame); */
|
|
|
457 #ifdef MEMORY_USAGE_STATS
|
|
|
458 CONSOLE_HAS_METHOD (mswindows, compute_scrollbar_instance_usage);
|
|
|
459 #endif
|
|
|
460 }
|
|
|
461
|
|
|
462 void
|
|
617
|
463 syms_of_scrollbar_mswindows (void)
|
|
428
|
464 {
|
|
|
465 DEFSUBR (Fmswindows_init_scrollbar_metrics);
|
|
|
466 }
|
|
|
467
|
|
|
468 void
|
|
617
|
469 vars_of_scrollbar_mswindows (void)
|
|
428
|
470 {
|
|
|
471 Fprovide (intern ("mswindows-scrollbars"));
|
|
|
472 }
|
|
|
473
|
|
617
|
474 void
|
|
|
475 complex_vars_of_scrollbar_mswindows (void)
|
|
|
476 {
|
|
|
477 staticpro (&Vmswindows_scrollbar_instance_table);
|
|
|
478 Vmswindows_scrollbar_instance_table =
|
|
|
479 make_lisp_hash_table (100, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
|
480 }
|
