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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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771
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6 Copyright (C) 2001, 2002 Ben Wing.
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428
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7
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8 This file is part of XEmacs.
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9
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10 XEmacs is free software; you can redistribute it and/or modify it
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11 under the terms of the GNU General Public License as published by the
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12 Free Software Foundation; either version 2, or (at your option) any
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13 later version.
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14
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15 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with XEmacs; see the file COPYING. If not, write to
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22 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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23 Boston, MA 02111-1307, USA. */
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24
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25 /* Synched up with: Not in FSF. */
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26
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771
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27 /* This file essentially Mule-ized (except perhaps some Unicode splitting).
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28 5-2000. */
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29
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428
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30 #include <config.h>
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31 #include "lisp.h"
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32
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800
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33 #include "device.h"
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617
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34 #include "elhash.h"
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428
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35 #include "events.h"
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36 #include "frame.h"
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617
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37 #include "opaque.h"
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428
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38 #include "scrollbar.h"
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39 #include "specifier.h"
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40 #include "window.h"
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41
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800
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42 #include "console-msw.h"
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43 #include "scrollbar-msw.h"
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44
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428
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45 /* We use a similar sort of vertical scrollbar drag hack for mswindows
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46 * scrollbars as is used for Motif or Lucid scrollbars under X.
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47 * We do character-based instead of line-based scrolling, which can mean that
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48 * without the hack it is impossible to drag to the end of a buffer. */
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49 #define VERTICAL_SCROLLBAR_DRAG_HACK
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50
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51 static int vertical_drag_in_progress = 0;
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673
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52 extern Lisp_Object mswindows_find_frame (HWND hwnd);
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428
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53
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617
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54 /* As long as the HWND is around, the scrollbar instance must be GC-protected.
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55 We have gotten crashes, apparently from trying to access a dead, freed
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56 frame inside of a window mirror pointed to by the scrollbar structure. */
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57 static Lisp_Object Vmswindows_scrollbar_instance_table;
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58
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428
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59 static void
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60 mswindows_create_scrollbar_instance (struct frame *f, int vertical,
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61 struct scrollbar_instance *sb)
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62 {
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63 int orientation;
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617
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64 Lisp_Object ptr;
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442
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65
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428
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66 sb->scrollbar_data = xnew_and_zero (struct mswindows_scrollbar_data);
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442
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67
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428
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68 if (vertical)
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69 orientation = SBS_VERT;
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70 else
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71 orientation = SBS_HORZ;
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442
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72
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428
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73 SCROLLBAR_MSW_HANDLE (sb) =
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771
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74 qxeCreateWindowEx (0, XETEXT ("SCROLLBAR"), 0, orientation|WS_CHILD,
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75 CW_USEDEFAULT, CW_USEDEFAULT,
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76 CW_USEDEFAULT, CW_USEDEFAULT,
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77 FRAME_MSWINDOWS_HANDLE (f),
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78 NULL, NULL, NULL);
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546
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79 SCROLLBAR_MSW_INFO (sb).cbSize = sizeof (SCROLLINFO);
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428
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80 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL;
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617
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81 GetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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82 &SCROLLBAR_MSW_INFO (sb));
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83 ptr = make_opaque_ptr (SCROLLBAR_MSW_HANDLE (sb));
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84 Fputhash (ptr, wrap_scrollbar_instance (sb),
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85 Vmswindows_scrollbar_instance_table);
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771
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86 qxeSetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_USERDATA,
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617
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87 (LONG) LISP_TO_VOID (ptr));
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428
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88 }
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89
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90 static void
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91 mswindows_free_scrollbar_instance (struct scrollbar_instance *sb)
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92 {
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617
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93 void *opaque =
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771
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94 (void *) qxeGetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_USERDATA);
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617
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95 Lisp_Object ptr;
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96
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97 VOID_TO_LISP (ptr, opaque);
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98 assert (OPAQUE_PTRP (ptr));
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99 ptr = Fremhash (ptr, Vmswindows_scrollbar_instance_table);
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100 assert (!NILP (ptr));
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428
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101 DestroyWindow (SCROLLBAR_MSW_HANDLE (sb));
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442
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102 if (sb->scrollbar_data)
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428
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103 xfree (sb->scrollbar_data);
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104 }
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105
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106 static void
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611
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107 unshow_that_mofo (void *handle)
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108 {
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109 ShowScrollBar ((HWND) handle, SB_CTL, 0);
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110 }
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111
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112 static void
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428
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113 mswindows_release_scrollbar_instance (struct scrollbar_instance *sb)
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114 {
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611
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115 if (gc_in_progress)
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116 /* #### way bogus! need to remove the offending call.
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117 see mark_redisplay(). */
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118 register_post_gc_action (unshow_that_mofo,
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119 (void *) SCROLLBAR_MSW_HANDLE (sb));
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120 else
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121 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, 0);
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428
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122 SCROLLBAR_MSW_SIZE (sb) = 0;
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123 }
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124
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125 #define UPDATE_POS_FIELD(field) \
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126 if (new_##field >= 0 && SCROLLBAR_MSW_DATA (sb)->field != new_##field) { \
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127 SCROLLBAR_MSW_DATA (sb)->field = new_##field; \
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128 pos_changed = 1; \
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129 }
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130
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131 static void
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132 mswindows_update_scrollbar_instance_values (struct window *w,
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133 struct scrollbar_instance *sb,
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134 int new_line_increment,
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135 int new_page_increment,
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136 int new_minimum, int new_maximum,
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137 int new_slider_size,
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138 int new_slider_position,
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139 int new_scrollbar_width,
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140 int new_scrollbar_height,
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141 int new_scrollbar_x,
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142 int new_scrollbar_y)
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143 {
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144 int pos_changed = 0;
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771
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145 int vert = qxeGetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_STYLE) & SBS_VERT;
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428
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146
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147 #if 0
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148 stderr_out ("[%d, %d], page = %d, pos = %d, inhibit = %d\n", new_minimum, new_maximum,
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149 new_slider_size, new_slider_position,inhibit_slider_size_change);
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150 #endif
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151
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152 /* These might be optimized, but since at least one will change at each
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153 call, it's probably not worth it. */
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154 SCROLLBAR_MSW_INFO (sb).nMin = new_minimum;
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155 SCROLLBAR_MSW_INFO (sb).nMax = new_maximum;
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156 SCROLLBAR_MSW_INFO (sb).nPage = new_slider_size + 1; /* +1 for DISABLENOSCROLL */
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157 SCROLLBAR_MSW_INFO (sb).nPos = new_slider_position;
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158 #ifndef VERTICAL_SCROLLBAR_DRAG_HACK
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159 SCROLLBAR_MSW_INFO (sb).fMask = ((vert && vertical_drag_in_progress)
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160 ? SIF_RANGE | SIF_POS
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161 : SIF_ALL | SIF_DISABLENOSCROLL);
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162 #else
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163 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL | SIF_DISABLENOSCROLL;
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164
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165 /* Ignore XEmacs' requests to update the thumb position and size; they don't
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166 * bear any relation to reality because we're reporting made-up positions */
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167 if (!(vert && vertical_drag_in_progress))
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168 #endif
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169 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb),
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170 TRUE);
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171
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172 UPDATE_POS_FIELD (scrollbar_x);
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173 UPDATE_POS_FIELD (scrollbar_y);
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174 UPDATE_POS_FIELD (scrollbar_width);
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175 UPDATE_POS_FIELD (scrollbar_height);
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176
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442
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177 if (pos_changed)
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428
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178 {
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617
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179 MoveWindow (SCROLLBAR_MSW_HANDLE (sb),
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180 new_scrollbar_x, new_scrollbar_y,
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181 new_scrollbar_width, new_scrollbar_height,
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182 TRUE);
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428
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183 }
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184 }
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185
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186 static void
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187 mswindows_update_scrollbar_instance_status (struct window *w,
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188 int active, int size,
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189 struct scrollbar_instance *sb)
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190 {
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191 if (SCROLLBAR_MSW_SIZE (sb) != size)
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192 {
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193 SCROLLBAR_MSW_SIZE (sb) = size;
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194 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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195 SCROLLBAR_MSW_SIZE (sb));
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196 SCROLLBAR_MSW_INFO(sb).fMask |= SIF_DISABLENOSCROLL;
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197 SetScrollInfo(SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb), TRUE);
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198 }
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199 }
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200
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201 void
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202 mswindows_handle_scrollbar_event (HWND hwnd, int code, int pos)
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203 {
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204 struct frame *f;
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205 Lisp_Object win, frame;
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617
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206 struct scrollbar_instance *sb = 0;
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207 void *v;
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428
|
208 SCROLLINFO scrollinfo;
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771
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209 int vert = qxeGetWindowLong (hwnd, GWL_STYLE) & SBS_VERT;
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428
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210 int value;
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211
|
|
771
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212 v = (void *) qxeGetWindowLong (hwnd, GWL_USERDATA);
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617
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213 if (!v)
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546
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214 {
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617
|
215 /* apparently this can happen, as it was definitely necessary
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216 to put the check in for sb below (VERTICAL_SCROLLBAR_DRAG_HACK) */
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546
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217 frame = mswindows_find_frame (hwnd);
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218 f = XFRAME (frame);
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219 win = FRAME_SELECTED_WINDOW (f);
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220 }
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221 else
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222 {
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617
|
223 Lisp_Object ptr;
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224 VOID_TO_LISP (ptr, v);
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225 assert (OPAQUE_PTRP (ptr));
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226 ptr = Fgethash (ptr, Vmswindows_scrollbar_instance_table, Qnil);
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227 sb = XSCROLLBAR_INSTANCE (ptr);
|
|
664
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228 /* #### we're still hitting an abort here with 0 as the second
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229 parameter, although only occasionally. It seems that sometimes we
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230 receive events for scrollbars that don't exist anymore. I assume
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231 it must happen like this: The user does something that causes a
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232 scrollbar to disappear (e.g. Alt-TAB, causing recomputation of
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233 everything in the new frame) and then immediately uses the mouse
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234 wheel, generating scrollbar events. Both events get posted before
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235 we have a chance to process them, and in processing the first, the
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236 scrollbar mentioned in the second disappears. */
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237 win = real_window (sb->mirror, 1);
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238 if (NILP (win))
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239 return;
|
|
617
|
240 frame = WINDOW_FRAME (XWINDOW (win));
|
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546
|
241 f = XFRAME (frame);
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|
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242 }
|
|
428
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243
|
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673
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244 /* SB_LINEDOWN == SB_CHARLEFT etc. This is the way they will
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245 always be - any Windows is binary compatible backward with
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246 old programs */
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428
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247
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248 switch (code)
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249 {
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250 case SB_LINEDOWN:
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251 mswindows_enqueue_misc_user_event
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252 (frame, vert ? Qscrollbar_line_down : Qscrollbar_char_right, win);
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253 break;
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|
442
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254
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428
|
255 case SB_LINEUP:
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256 mswindows_enqueue_misc_user_event
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257 (frame, vert ? Qscrollbar_line_up : Qscrollbar_char_left, win);
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258 break;
|
|
442
|
259
|
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428
|
260 case SB_PAGEDOWN:
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261 mswindows_enqueue_misc_user_event
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262 (win, vert ? Qscrollbar_page_down : Qscrollbar_page_right,
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263 vert ? Fcons (win, Qnil) : win);
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264 break;
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265
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266 case SB_PAGEUP:
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267 mswindows_enqueue_misc_user_event
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268 (frame,
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269 vert ? Qscrollbar_page_up : Qscrollbar_page_left,
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270 vert ? Fcons (win, Qnil) : win);
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271 break;
|
|
442
|
272
|
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428
|
273 case SB_BOTTOM:
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274 mswindows_enqueue_misc_user_event
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275 (frame, vert ? Qscrollbar_to_bottom : Qscrollbar_to_right, win);
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276 break;
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277
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|
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278 case SB_TOP:
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279 mswindows_enqueue_misc_user_event
|
|
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280 (frame, vert ? Qscrollbar_to_top : Qscrollbar_to_left, win);
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281 break;
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282
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|
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283 case SB_THUMBTRACK:
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284 case SB_THUMBPOSITION:
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285 scrollinfo.cbSize = sizeof(SCROLLINFO);
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|
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286 scrollinfo.fMask = SIF_ALL;
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|
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287 GetScrollInfo (hwnd, SB_CTL, &scrollinfo);
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|
|
288 vertical_drag_in_progress = vert;
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|
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289 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
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290 if (vert && (scrollinfo.nTrackPos > scrollinfo.nPos))
|
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291 /* new buffer position =
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|
292 * buffer position at start of drag +
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|
|
293 * ((text remaining in buffer at start of drag) *
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|
|
294 * (amount that the thumb has been moved) /
|
|
|
295 * (space that remained past end of the thumb at start of drag)) */
|
|
|
296 value = (int)
|
|
|
297 (scrollinfo.nPos
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|
|
298 + (((double)
|
|
|
299 (scrollinfo.nMax - scrollinfo.nPos)
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|
|
300 * (scrollinfo.nTrackPos - scrollinfo.nPos))
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|
|
301 / (scrollinfo.nMax - scrollinfo.nPage - scrollinfo.nPos)))
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|
|
302 - 2; /* ensure that the last line doesn't disappear off screen */
|
|
|
303 else
|
|
|
304 #endif
|
|
|
305 value = scrollinfo.nTrackPos;
|
|
|
306 mswindows_enqueue_misc_user_event
|
|
|
307 (frame,
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|
|
308 vert ? Qscrollbar_vertical_drag : Qscrollbar_horizontal_drag,
|
|
|
309 Fcons (win, make_int (value)));
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|
|
310 break;
|
|
|
311
|
|
|
312 case SB_ENDSCROLL:
|
|
|
313 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
|
|
546
|
314 if (vertical_drag_in_progress && sb)
|
|
428
|
315 /* User has just dropped the thumb - finally update it */
|
|
|
316 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
|
|
|
317 &SCROLLBAR_MSW_INFO (sb), TRUE);
|
|
|
318 #endif
|
|
|
319 vertical_drag_in_progress = 0;
|
|
|
320 break;
|
|
|
321 }
|
|
|
322 }
|
|
|
323
|
|
|
324 static int
|
|
771
|
325 can_scroll (struct scrollbar_instance *scrollbar)
|
|
428
|
326 {
|
|
|
327 return scrollbar != NULL
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|
|
328 && IsWindowVisible (SCROLLBAR_MSW_HANDLE (scrollbar))
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|
|
329 && IsWindowEnabled (SCROLLBAR_MSW_HANDLE (scrollbar));
|
|
|
330 }
|
|
|
331
|
|
|
332 int
|
|
464
|
333 mswindows_handle_mousewheel_event (Lisp_Object frame, int keys, int delta,
|
|
|
334 POINTS where)
|
|
428
|
335 {
|
|
442
|
336 int hasVertBar, hasHorzBar; /* Indicates presence of scroll bars */
|
|
428
|
337 unsigned wheelScrollLines = 0; /* Number of lines per wheel notch */
|
|
707
|
338 Lisp_Object win, corpore, sano;
|
|
464
|
339 struct window_mirror *mirror;
|
|
707
|
340 int mene, _mene, tekel, upharsin;
|
|
|
341 Charbpos mens, sana;
|
|
|
342 Charcount in;
|
|
|
343 struct window *needle_in_haystack = 0;
|
|
464
|
344 POINT donde_esta;
|
|
428
|
345
|
|
464
|
346 donde_esta.x = where.x;
|
|
|
347 donde_esta.y = where.y;
|
|
|
348
|
|
|
349 /* Find the window to scroll */
|
|
|
350
|
|
707
|
351 /* The mouse event could actually occur outside of the emacs
|
|
|
352 frame. */
|
|
|
353 if (ScreenToClient (FRAME_MSWINDOWS_HANDLE (XFRAME (frame)),
|
|
|
354 &donde_esta) != 0)
|
|
771
|
355 /* stderr_out ("donde_esta: %d %d\n", donde_esta.x, donde_esta.y); */
|
|
|
356 pixel_to_glyph_translation (XFRAME (frame), donde_esta.x, donde_esta.y,
|
|
|
357 &mene, &_mene, &tekel, &upharsin,
|
|
|
358 &needle_in_haystack,
|
|
|
359 &mens, &sana, &in, &corpore, &sano);
|
|
|
360
|
|
|
361 if (needle_in_haystack)
|
|
707
|
362 {
|
|
793
|
363 win = wrap_window (needle_in_haystack);
|
|
771
|
364 /* stderr_out ("found needle\n");
|
|
|
365 debug_print (win); */
|
|
707
|
366 }
|
|
771
|
367 else
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707
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368 {
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369 win = FRAME_SELECTED_WINDOW (XFRAME (frame));
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370 needle_in_haystack = XWINDOW (win);
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371 }
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464
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372
|
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707
|
373 mirror = find_window_mirror (needle_in_haystack);
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428
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374
|
|
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375 /* Check that there is something to scroll */
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376 hasVertBar = can_scroll (mirror->scrollbar_vertical_instance);
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377 hasHorzBar = can_scroll (mirror->scrollbar_horizontal_instance);
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|
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378 if (!hasVertBar && !hasHorzBar)
|
|
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379 return FALSE;
|
|
|
380
|
|
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381 /* No support for panning and zooming, so ignore */
|
|
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382 if (keys & (MK_SHIFT | MK_CONTROL))
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|
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383 return FALSE;
|
|
|
384
|
|
|
385 /* Get the number of lines per wheel delta */
|
|
771
|
386 qxeSystemParametersInfo (SPI_GETWHEELSCROLLLINES, 0, &wheelScrollLines, 0);
|
|
428
|
387
|
|
|
388 /* Calculate the amount to scroll */
|
|
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389 if (wheelScrollLines == WHEEL_PAGESCROLL)
|
|
|
390 {
|
|
|
391 /* Scroll by a page */
|
|
|
392 Lisp_Object function;
|
|
|
393 if (hasVertBar)
|
|
|
394 function = delta > 0 ? Qscrollbar_page_up : Qscrollbar_page_down;
|
|
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395 else
|
|
|
396 function = delta > 0 ? Qscrollbar_page_left : Qscrollbar_page_right;
|
|
|
397 mswindows_enqueue_misc_user_event (frame, function, Fcons (win, Qnil));
|
|
|
398 }
|
|
|
399 else /* Scroll by a number of lines */
|
|
|
400 {
|
|
|
401 /* Calc the number of lines to scroll */
|
|
|
402 int toScroll = MulDiv (delta, wheelScrollLines, WHEEL_DELTA);
|
|
|
403
|
|
|
404 /* Do the scroll */
|
|
|
405 Lisp_Object function;
|
|
|
406 if (hasVertBar)
|
|
|
407 function = delta > 0 ? Qscrollbar_line_up : Qscrollbar_line_down;
|
|
|
408 else
|
|
|
409 function = delta > 0 ? Qscrollbar_char_left : Qscrollbar_char_right;
|
|
|
410 if (toScroll < 0)
|
|
|
411 toScroll = -toScroll;
|
|
|
412 while (toScroll--)
|
|
|
413 mswindows_enqueue_misc_user_event (frame, function, win);
|
|
|
414 }
|
|
|
415
|
|
|
416 return TRUE;
|
|
|
417 }
|
|
|
418
|
|
|
419 #ifdef MEMORY_USAGE_STATS
|
|
|
420
|
|
|
421 static int
|
|
|
422 mswindows_compute_scrollbar_instance_usage (struct device *d,
|
|
|
423 struct scrollbar_instance *inst,
|
|
|
424 struct overhead_stats *ovstats)
|
|
|
425 {
|
|
|
426 int total = 0;
|
|
|
427
|
|
|
428 while (inst)
|
|
|
429 {
|
|
|
430 struct mswindows_scrollbar_data *data =
|
|
|
431 (struct mswindows_scrollbar_data *) inst->scrollbar_data;
|
|
|
432
|
|
|
433 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
|
434 inst = inst->next;
|
|
|
435 }
|
|
|
436
|
|
|
437 return total;
|
|
|
438 }
|
|
|
439
|
|
|
440 #endif /* MEMORY_USAGE_STATS */
|
|
|
441
|
|
|
442 /************************************************************************/
|
|
|
443 /* Device-specific ghost specifiers initialization */
|
|
|
444 /************************************************************************/
|
|
|
445
|
|
617
|
446 DEFUN ("mswindows-init-scrollbar-metrics", Fmswindows_init_scrollbar_metrics,
|
|
|
447 1, 1, 0, /*
|
|
428
|
448 */
|
|
|
449 (locale))
|
|
|
450 {
|
|
|
451 if (DEVICEP (locale))
|
|
|
452 {
|
|
|
453 add_spec_to_ghost_specifier (Vscrollbar_width,
|
|
|
454 make_int (GetSystemMetrics (SM_CXVSCROLL)),
|
|
|
455 locale, Qmswindows, Qnil);
|
|
|
456 add_spec_to_ghost_specifier (Vscrollbar_height,
|
|
|
457 make_int (GetSystemMetrics (SM_CYHSCROLL)),
|
|
|
458 locale, Qmswindows, Qnil);
|
|
|
459 }
|
|
|
460 return Qnil;
|
|
|
461 }
|
|
|
462
|
|
|
463
|
|
|
464 /************************************************************************/
|
|
|
465 /* initialization */
|
|
|
466 /************************************************************************/
|
|
|
467
|
|
|
468 void
|
|
|
469 console_type_create_scrollbar_mswindows (void)
|
|
|
470 {
|
|
|
471 CONSOLE_HAS_METHOD (mswindows, create_scrollbar_instance);
|
|
|
472 CONSOLE_HAS_METHOD (mswindows, free_scrollbar_instance);
|
|
|
473 CONSOLE_HAS_METHOD (mswindows, release_scrollbar_instance);
|
|
|
474 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_values);
|
|
|
475 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_status);
|
|
|
476 /* CONSOLE_HAS_METHOD (mswindows, scrollbar_width_changed_in_frame); */
|
|
|
477 #ifdef MEMORY_USAGE_STATS
|
|
|
478 CONSOLE_HAS_METHOD (mswindows, compute_scrollbar_instance_usage);
|
|
|
479 #endif
|
|
|
480 }
|
|
|
481
|
|
|
482 void
|
|
617
|
483 syms_of_scrollbar_mswindows (void)
|
|
428
|
484 {
|
|
|
485 DEFSUBR (Fmswindows_init_scrollbar_metrics);
|
|
|
486 }
|
|
|
487
|
|
|
488 void
|
|
617
|
489 vars_of_scrollbar_mswindows (void)
|
|
428
|
490 {
|
|
|
491 Fprovide (intern ("mswindows-scrollbars"));
|
|
|
492 }
|
|
|
493
|
|
617
|
494 void
|
|
|
495 complex_vars_of_scrollbar_mswindows (void)
|
|
|
496 {
|
|
|
497 staticpro (&Vmswindows_scrollbar_instance_table);
|
|
|
498 Vmswindows_scrollbar_instance_table =
|
|
|
499 make_lisp_hash_table (100, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
|
500 }
|
