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428
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1 /* Implements an elisp-programmable menubar.
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2 Copyright (C) 1993, 1994 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Tinker Systems and INS Engineering Corp.
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826
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4 Copyright (C) 2001, 2002 Ben Wing.
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428
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: Not in FSF. */
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24
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442
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25 /* Authorship:
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26
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27 Created by Ben Wing as part of device-abstraction work for 19.12.
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28 Menu filters and many other keywords added by Stig for 19.12.
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29 Menu accelerators c. 1997? by ??. Moved here from event-stream.c.
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30 Much other work post-1996 by ??.
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31 */
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428
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32
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33 #include <config.h>
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34 #include "lisp.h"
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35
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36 #include "buffer.h"
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872
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37 #include "device-impl.h"
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38 #include "frame-impl.h"
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428
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39 #include "gui.h"
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442
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40 #include "keymap.h"
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428
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41 #include "menubar.h"
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42 #include "redisplay.h"
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800
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43 #include "specifier.h"
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872
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44 #include "window-impl.h"
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428
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45
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46 int menubar_show_keybindings;
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47 Lisp_Object Vmenubar_configuration;
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48
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49 Lisp_Object Qcurrent_menubar;
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50
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51 Lisp_Object Qactivate_menubar_hook, Vactivate_menubar_hook;
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52
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53 Lisp_Object Vmenubar_visible_p;
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54
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55 static Lisp_Object Vcurrent_menubar; /* DO NOT ever reference this.
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56 Always go through Qcurrent_menubar.
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57 See below. */
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58
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59 Lisp_Object Vblank_menubar;
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60
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61 int popup_menu_titles;
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62
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63 Lisp_Object Vmenubar_pointer_glyph;
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64
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442
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65 /* prefix key(s) that must match in order to activate menu.
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66 This is ugly. fix me.
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67 */
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68 Lisp_Object Vmenu_accelerator_prefix;
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69
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70 /* list of modifier keys to match accelerator for top level menus */
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71 Lisp_Object Vmenu_accelerator_modifiers;
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72
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73 /* whether menu accelerators are enabled */
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74 Lisp_Object Vmenu_accelerator_enabled;
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75
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76 /* keymap for auxiliary menu accelerator functions */
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77 Lisp_Object Vmenu_accelerator_map;
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78
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79 Lisp_Object Qmenu_force;
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80 Lisp_Object Qmenu_fallback;
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81 Lisp_Object Qmenu_quit;
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82 Lisp_Object Qmenu_up;
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83 Lisp_Object Qmenu_down;
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84 Lisp_Object Qmenu_left;
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85 Lisp_Object Qmenu_right;
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86 Lisp_Object Qmenu_select;
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87 Lisp_Object Qmenu_escape;
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88
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428
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89 static int
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90 menubar_variable_changed (Lisp_Object sym, Lisp_Object *val,
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91 Lisp_Object in_object, int flags)
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92 {
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93 MARK_MENUBAR_CHANGED;
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94 return 0;
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95 }
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96
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97 void
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98 update_frame_menubars (struct frame *f)
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99 {
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100 if (f->menubar_changed || f->windows_changed)
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101 MAYBE_FRAMEMETH (f, update_frame_menubars, (f));
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102
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103 f->menubar_changed = 0;
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104 }
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105
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106 void
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107 free_frame_menubars (struct frame *f)
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108 {
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109 /* If we had directly allocated any memory for the menubars instead
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110 of using all Lisp_Objects this is where we would now free it. */
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111
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112 MAYBE_FRAMEMETH (f, free_frame_menubars, (f));
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113 }
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114
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115 static void
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116 menubar_visible_p_changed (Lisp_Object specifier, struct window *w,
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117 Lisp_Object oldval)
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118 {
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119 MARK_MENUBAR_CHANGED;
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120 }
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121
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122 static void
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123 menubar_visible_p_changed_in_frame (Lisp_Object specifier, struct frame *f,
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124 Lisp_Object oldval)
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125 {
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126 update_frame_menubars (f);
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127 }
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128
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129 Lisp_Object
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442
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130 current_frame_menubar (const struct frame* f)
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428
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131 {
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132 struct window *w = XWINDOW (FRAME_LAST_NONMINIBUF_WINDOW (f));
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133 return symbol_value_in_buffer (Qcurrent_menubar, w->buffer);
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134 }
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135
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136 Lisp_Object
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137 menu_parse_submenu_keywords (Lisp_Object desc, Lisp_Object gui_item)
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138 {
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442
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139 Lisp_Gui_Item *pgui_item = XGUI_ITEM (gui_item);
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428
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140
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141 /* Menu descriptor should be a list */
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142 CHECK_CONS (desc);
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143
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144 /* First element may be menu name, although can be omitted.
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145 Let's think that if stuff begins with anything than a keyword
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146 or a list (submenu), this is a menu name, expected to be a string */
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147 if (!KEYWORDP (XCAR (desc)) && !CONSP (XCAR (desc)))
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148 {
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149 CHECK_STRING (XCAR (desc));
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150 pgui_item->name = XCAR (desc);
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151 desc = XCDR (desc);
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152 if (!NILP (desc))
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153 CHECK_CONS (desc);
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154 }
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155
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156 /* Walk along all key-value pairs */
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157 while (!NILP(desc) && KEYWORDP (XCAR (desc)))
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158 {
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159 Lisp_Object key, val;
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160 key = XCAR (desc);
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161 desc = XCDR (desc);
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162 CHECK_CONS (desc);
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163 val = XCAR (desc);
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164 desc = XCDR (desc);
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165 if (!NILP (desc))
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166 CHECK_CONS (desc);
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167 gui_item_add_keyval_pair (gui_item, key, val, ERROR_ME);
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168 }
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169
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170 /* Return the rest - supposed to be a list of items */
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171 return desc;
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172 }
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173
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174 DEFUN ("menu-find-real-submenu", Fmenu_find_real_submenu, 2, 2, 0, /*
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175 Find a submenu descriptor within DESC by following PATH.
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176 This function finds a submenu descriptor, either from the description
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177 DESC or generated by a filter within DESC. The function regards :config
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178 and :included keywords in the DESC, and expands submenus along the
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179 PATH using :filter functions. Return value is a descriptor for the
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180 submenu, NOT expanded and NOT checked against :config and :included.
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181 Also, individual menu items are not looked for, only submenus.
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182
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183 See also 'find-menu-item'.
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184 */
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185 (desc, path))
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186 {
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187 Lisp_Object path_entry, submenu_desc, submenu;
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442
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188 struct gcpro gcpro1, gcpro2;
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428
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189 Lisp_Object gui_item = allocate_gui_item ();
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440
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190 Lisp_Gui_Item* pgui_item = XGUI_ITEM (gui_item);
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428
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191
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442
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192 GCPRO2 (gui_item, desc);
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428
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193
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194 EXTERNAL_LIST_LOOP (path_entry, path)
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195 {
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196 /* Verify that DESC describes a menu, not single item */
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197 if (!CONSP (desc))
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198 RETURN_UNGCPRO (Qnil);
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199
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200 /* Parse this menu */
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201 desc = menu_parse_submenu_keywords (desc, gui_item);
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202
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203 /* Check that this (sub)menu is active */
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204 if (!gui_item_active_p (gui_item))
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205 RETURN_UNGCPRO (Qnil);
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206
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207 /* Apply :filter */
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208 if (!NILP (pgui_item->filter))
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209 desc = call1 (pgui_item->filter, desc);
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210
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211 /* Find the next menu on the path inside this one */
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212 EXTERNAL_LIST_LOOP (submenu_desc, desc)
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213 {
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214 submenu = XCAR (submenu_desc);
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215 if (CONSP (submenu)
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216 && STRINGP (XCAR (submenu))
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217 && !NILP (Fstring_equal (XCAR (submenu), XCAR (path_entry))))
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218 {
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219 desc = submenu;
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220 goto descend;
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221 }
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222 }
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223 /* Submenu not found */
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224 RETURN_UNGCPRO (Qnil);
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225
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226 descend:
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227 /* Prepare for the next iteration */
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228 gui_item_init (gui_item);
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229 }
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230
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231 /* We have successfully descended down the end of the path */
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232 UNGCPRO;
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233 return desc;
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234 }
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235
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236 DEFUN ("popup-menu", Fpopup_menu, 1, 2, 0, /*
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444
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237 Pop up the menu described by MENU-DESCRIPTION.
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428
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238 A menu description is a list of menu items, strings, and submenus.
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239
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240 The first element of a menu must be a string, which is the name of the menu.
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241 This is the string that will be displayed in the parent menu, if any. For
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242 toplevel menus, it is ignored. This string is not displayed in the menu
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243 itself.
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244
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245 If an element of a menu is a string, then that string will be presented in
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246 the menu as unselectable text.
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247
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248 If an element of a menu is a string consisting solely of hyphens, then that
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249 item will be presented as a solid horizontal line.
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250
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251 If an element of a menu is a list, it is treated as a submenu. The name of
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252 that submenu (the first element in the list) will be used as the name of the
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253 item representing this menu on the parent.
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254
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255 Otherwise, the element must be a vector, which describes a menu item.
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256 A menu item can have any of the following forms:
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257
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258 [ "name" callback <active-p> ]
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259 [ "name" callback <active-p> <suffix> ]
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260 [ "name" callback :<keyword> <value> :<keyword> <value> ... ]
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261
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262 The name is the string to display on the menu; it is filtered through the
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263 resource database, so it is possible for resources to override what string
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264 is actually displayed.
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265
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266 If the `callback' of a menu item is a symbol, then it must name a command.
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267 It will be invoked with `call-interactively'. If it is a list, then it is
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268 evaluated with `eval'.
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269
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270 The possible keywords are this:
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271
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272 :active <form> Same as <active-p> in the first two forms: the
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273 expression is evaluated just before the menu is
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274 displayed, and the menu will be selectable only if
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275 the result is non-nil.
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276
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277 :suffix <form> Same as <suffix> in the second form: the expression
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278 is evaluated just before the menu is displayed and
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279 resulting string is appended to the displayed name,
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280 providing a convenient way of adding the name of a
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281 command's ``argument'' to the menu, like
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282 ``Kill Buffer NAME''.
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283
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284 :keys "string" Normally, the keyboard equivalents of commands in
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285 menus are displayed when the `callback' is a symbol.
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286 This can be used to specify keys for more complex menu
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287 items. It is passed through `substitute-command-keys'
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288 first.
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289
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290 :style <style> Specifies what kind of object this menu item is:
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291
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292 nil A normal menu item.
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293 toggle A toggle button.
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294 radio A radio button.
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295
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296 The only difference between toggle and radio buttons is
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297 how they are displayed. But for consistency, a toggle
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298 button should be used when there is one option whose
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|
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299 value can be turned on or off, and radio buttons should
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|
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300 be used when there is a set of mutually exclusive
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301 options. When using a group of radio buttons, you
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302 should arrange for no more than one to be marked as
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303 selected at a time.
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304
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305 :selected <form> Meaningful only when STYLE is `toggle' or `radio'.
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306 This specifies whether the button will be in the
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307 selected or unselected state.
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308
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|
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309 For example:
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310
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311 [ "Save As..." write-file t ]
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312 [ "Revert Buffer" revert-buffer (buffer-modified-p) ]
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313 [ "Read Only" toggle-read-only :style toggle :selected buffer-read-only ]
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314
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315 See menubar.el for many more examples.
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316 */
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444
|
317 (menu_description, event))
|
|
428
|
318 {
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|
444
|
319 struct frame *f = decode_frame (Qnil);
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|
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320 MAYBE_FRAMEMETH (f, popup_menu, (menu_description, event));
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|
428
|
321 return Qnil;
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|
|
322 }
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323
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|
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324 DEFUN ("normalize-menu-item-name", Fnormalize_menu_item_name, 1, 2, 0, /*
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|
|
325 Convert a menu item name string into normal form, and return the new string.
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|
|
326 Menu item names should be converted to normal form before being compared.
|
|
442
|
327 This removes %_'s (accelerator indications) and converts %% to %.
|
|
428
|
328 */
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|
|
329 (name, buffer))
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|
|
330 {
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|
|
331 struct buffer *buf = decode_buffer (buffer, 0);
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|
|
332 Charcount end;
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|
|
333 int i;
|
|
867
|
334 Ibyte *name_data;
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|
|
335 Ibyte *string_result;
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|
|
336 Ibyte *string_result_ptr;
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|
|
337 Ichar elt;
|
|
428
|
338 int expecting_underscore = 0;
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|
|
339
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|
|
340 CHECK_STRING (name);
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|
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341
|
|
826
|
342 end = string_char_length (name);
|
|
793
|
343 name_data = XSTRING_DATA (name);
|
|
428
|
344
|
|
867
|
345 string_result = (Ibyte *) ALLOCA (end * MAX_ICHAR_LEN);
|
|
428
|
346 string_result_ptr = string_result;
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|
|
347 for (i = 0; i < end; i++)
|
|
|
348 {
|
|
867
|
349 elt = itext_ichar (name_data);
|
|
428
|
350 elt = DOWNCASE (buf, elt);
|
|
|
351 if (expecting_underscore)
|
|
|
352 {
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|
|
353 expecting_underscore = 0;
|
|
|
354 switch (elt)
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|
|
355 {
|
|
|
356 case '%':
|
|
|
357 /* Allow `%%' to mean `%'. */
|
|
867
|
358 string_result_ptr += set_itext_ichar (string_result_ptr, '%');
|
|
428
|
359 break;
|
|
|
360 case '_':
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|
|
361 break;
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|
|
362 default:
|
|
867
|
363 string_result_ptr += set_itext_ichar (string_result_ptr, '%');
|
|
|
364 string_result_ptr += set_itext_ichar (string_result_ptr, elt);
|
|
428
|
365 }
|
|
|
366 }
|
|
|
367 else if (elt == '%')
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|
|
368 expecting_underscore = 1;
|
|
|
369 else
|
|
867
|
370 string_result_ptr += set_itext_ichar (string_result_ptr, elt);
|
|
|
371 INC_IBYTEPTR (name_data);
|
|
428
|
372 }
|
|
|
373
|
|
442
|
374 if (string_result_ptr - string_result == XSTRING_LENGTH (name)
|
|
|
375 && !memcmp (string_result, XSTRING_DATA (name), XSTRING_LENGTH (name)))
|
|
|
376 return name;
|
|
|
377
|
|
428
|
378 return make_string (string_result, string_result_ptr - string_result);
|
|
|
379 }
|
|
|
380
|
|
|
381 void
|
|
|
382 syms_of_menubar (void)
|
|
|
383 {
|
|
563
|
384 DEFSYMBOL (Qcurrent_menubar);
|
|
442
|
385
|
|
563
|
386 DEFSYMBOL (Qmenu_force);
|
|
|
387 DEFSYMBOL (Qmenu_fallback);
|
|
442
|
388
|
|
563
|
389 DEFSYMBOL (Qmenu_quit);
|
|
|
390 DEFSYMBOL (Qmenu_up);
|
|
|
391 DEFSYMBOL (Qmenu_down);
|
|
|
392 DEFSYMBOL (Qmenu_left);
|
|
|
393 DEFSYMBOL (Qmenu_right);
|
|
|
394 DEFSYMBOL (Qmenu_select);
|
|
|
395 DEFSYMBOL (Qmenu_escape);
|
|
442
|
396
|
|
428
|
397 DEFSUBR (Fpopup_menu);
|
|
|
398 DEFSUBR (Fnormalize_menu_item_name);
|
|
|
399 DEFSUBR (Fmenu_find_real_submenu);
|
|
|
400 }
|
|
|
401
|
|
|
402 void
|
|
|
403 vars_of_menubar (void)
|
|
|
404 {
|
|
440
|
405 /* put in Vblank_menubar a menubar value which has no visible
|
|
|
406 * items. This is a bit tricky due to various quirks. We
|
|
|
407 * could use '(["" nil nil]), but this is apparently equivalent
|
|
|
408 * to '(nil), and a new frame created with this menubar will
|
|
|
409 * get a vertically-squished menubar. If we use " " as the
|
|
|
410 * button title instead of "", we get an etched button border.
|
|
|
411 * So we use
|
|
|
412 * '(("No active menubar" ["" nil nil]))
|
|
|
413 * which creates a menu whose title is "No active menubar",
|
|
|
414 * and this works fine.
|
|
|
415 */
|
|
428
|
416
|
|
771
|
417 Vblank_menubar = list1 (list2 (build_msg_string ("No active menubar"),
|
|
440
|
418 vector3 (build_string (""), Qnil, Qnil)));
|
|
|
419 staticpro (&Vblank_menubar);
|
|
428
|
420
|
|
|
421 DEFVAR_BOOL ("popup-menu-titles", &popup_menu_titles /*
|
|
|
422 If true, popup menus will have title bars at the top.
|
|
|
423 */ );
|
|
|
424 popup_menu_titles = 1;
|
|
|
425
|
|
|
426 /* #### Replace current menubar with a specifier. */
|
|
|
427
|
|
|
428 /* All C code must access the menubar via Qcurrent_menubar
|
|
|
429 because it can be buffer-local. Note that Vcurrent_menubar
|
|
|
430 doesn't need to exist at all, except for the magic function. */
|
|
|
431
|
|
|
432 DEFVAR_LISP_MAGIC ("current-menubar", &Vcurrent_menubar /*
|
|
|
433 The current menubar. This may be buffer-local.
|
|
|
434
|
|
|
435 When the menubar is changed, the function `set-menubar-dirty-flag' has to
|
|
|
436 be called for the menubar to be updated on the frame. See `set-menubar'
|
|
|
437 and `set-buffer-menubar'.
|
|
|
438
|
|
|
439 A menubar is a list of menus and menu-items.
|
|
|
440 A menu is a list of menu items, keyword-value pairs, strings, and submenus.
|
|
|
441
|
|
|
442 The first element of a menu must be a string, which is the name of the menu.
|
|
|
443 This is the string that will be displayed in the parent menu, if any. For
|
|
|
444 toplevel menus, it is ignored. This string is not displayed in the menu
|
|
|
445 itself.
|
|
|
446
|
|
442
|
447 Menu accelerators can be indicated in the string by putting the
|
|
|
448 sequence "%_" before the character corresponding to the key that will
|
|
|
449 invoke the menu or menu item. Uppercase and lowercase accelerators
|
|
|
450 are equivalent. The sequence "%%" is also special, and is translated
|
|
|
451 into a single %.
|
|
|
452
|
|
|
453 If no menu accelerator is present in the string, XEmacs will act as if
|
|
|
454 the first character has been tagged as an accelerator.
|
|
|
455
|
|
|
456 Immediately following the name string of the menu, various optional
|
|
|
457 keyword-value pairs are permitted: currently, :filter, :active, :included,
|
|
|
458 and :config. (See below.)
|
|
428
|
459
|
|
|
460 If an element of a menu (or menubar) is a string, then that string will be
|
|
|
461 presented as unselectable text.
|
|
|
462
|
|
|
463 If an element of a menu is a string consisting solely of hyphens, then that
|
|
|
464 item will be presented as a solid horizontal line.
|
|
|
465
|
|
442
|
466 If an element of a menu is a string beginning with "--:", it will be
|
|
|
467 presented as a line whose appearance is controlled by the rest of the
|
|
|
468 text in the string. The allowed line specs are system-dependent, and
|
|
|
469 currently work only under X Windows (with Lucid and Motif menubars);
|
|
|
470 otherwise, a solid horizontal line is presented, as if the string were
|
|
|
471 all hyphens.
|
|
|
472
|
|
|
473 The possibilities are:
|
|
|
474
|
|
|
475 "--:singleLine"
|
|
|
476 "--:doubleLine"
|
|
|
477 "--:singleDashedLine"
|
|
|
478 "--:doubleDashedLine"
|
|
|
479 "--:noLine"
|
|
|
480 "--:shadowEtchedIn"
|
|
|
481 "--:shadowEtchedOut"
|
|
|
482 "--:shadowEtchedInDash"
|
|
|
483 "--:shadowEtchedOutDash"
|
|
|
484 "--:shadowDoubleEtchedIn" (Lucid menubars only)
|
|
|
485 "--:shadowDoubleEtchedOut" (Lucid menubars only)
|
|
|
486 "--:shadowDoubleEtchedInDash" (Lucid menubars only)
|
|
|
487 "--:shadowDoubleEtchedOutDash" (Lucid menubars only)
|
|
|
488
|
|
428
|
489 If an element of a menu is a list, it is treated as a submenu. The name of
|
|
|
490 that submenu (the first element in the list) will be used as the name of the
|
|
|
491 item representing this menu on the parent.
|
|
|
492
|
|
|
493 If an element of a menubar is `nil', then it is used to represent the
|
|
|
494 division between the set of menubar-items which are flushleft and those
|
|
|
495 which are flushright.
|
|
|
496
|
|
|
497 Otherwise, the element must be a vector, which describes a menu item.
|
|
442
|
498 A menu item is of the following form:
|
|
|
499
|
|
|
500 [ "name" callback :<keyword> <value> :<keyword> <value> ... ]
|
|
|
501
|
|
|
502 The following forms are also accepted for compatibility, but deprecated:
|
|
428
|
503
|
|
|
504 [ "name" callback <active-p> ]
|
|
|
505 [ "name" callback <active-p> <suffix> ]
|
|
|
506
|
|
|
507 The name is the string to display on the menu; it is filtered through the
|
|
|
508 resource database, so it is possible for resources to override what string
|
|
442
|
509 is actually displayed. Menu accelerator indicators (the sequence `%_') are
|
|
|
510 also processed; see above. If the name is not a string, it will be
|
|
|
511 evaluated with `eval', and the result should be a string.
|
|
428
|
512
|
|
|
513 If the `callback' of a menu item is a symbol, then it must name a command.
|
|
|
514 It will be invoked with `call-interactively'. If it is a list, then it is
|
|
|
515 evaluated with `eval'.
|
|
|
516
|
|
442
|
517 In the deprecated forms, <active-p> is equivalent to using the :active
|
|
|
518 keyword, and <suffix> is equivalent to using the :suffix keyword.
|
|
428
|
519
|
|
442
|
520 The possible keywords are:
|
|
|
521
|
|
|
522 :active <form> The expression is evaluated just before the menu is
|
|
428
|
523 displayed, and the menu will be selectable only if
|
|
|
524 the result is non-nil.
|
|
|
525
|
|
442
|
526 :suffix <form> The expression is evaluated just before the menu is
|
|
|
527 displayed and the resulting string is appended to
|
|
|
528 the displayed name, providing a convenient way of
|
|
|
529 adding the name of a command's ``argument'' to the
|
|
|
530 menu, like ``Kill Buffer NAME''.
|
|
428
|
531
|
|
|
532 :keys "string" Normally, the keyboard equivalents of commands in
|
|
|
533 menus are displayed when the `callback' is a symbol.
|
|
|
534 This can be used to specify keys for more complex menu
|
|
|
535 items. It is passed through `substitute-command-keys'
|
|
|
536 first.
|
|
|
537
|
|
|
538 :style <style> Specifies what kind of object this menu item is:
|
|
|
539
|
|
|
540 nil A normal menu item.
|
|
|
541 toggle A toggle button.
|
|
|
542 radio A radio button.
|
|
|
543 button A menubar button.
|
|
|
544
|
|
|
545 The only difference between toggle and radio buttons is
|
|
|
546 how they are displayed. But for consistency, a toggle
|
|
|
547 button should be used when there is one option whose
|
|
|
548 value can be turned on or off, and radio buttons should
|
|
|
549 be used when there is a set of mutually exclusive
|
|
|
550 options. When using a group of radio buttons, you
|
|
|
551 should arrange for no more than one to be marked as
|
|
|
552 selected at a time.
|
|
|
553
|
|
|
554 :selected <form> Meaningful only when STYLE is `toggle', `radio' or
|
|
|
555 `button'. This specifies whether the button will be in
|
|
|
556 the selected or unselected state.
|
|
|
557
|
|
|
558 :included <form> This can be used to control the visibility of a menu or
|
|
|
559 menu item. The form is evaluated and the menu or menu
|
|
|
560 item is only displayed if the result is non-nil.
|
|
|
561
|
|
|
562 :config <symbol> This is an efficient shorthand for
|
|
|
563 :included (memq symbol menubar-configuration)
|
|
|
564 See the variable `menubar-configuration'.
|
|
|
565
|
|
442
|
566 :filter <function> A menu filter can only be used at the beginning of a
|
|
|
567 submenu description (i.e. not in a menu item itself).
|
|
|
568 (Remember that most of the keywords can take evaluated
|
|
|
569 expressions as well as constants.) The filter is used to
|
|
|
570 incrementally create a submenu only when it is selected
|
|
|
571 by the user and not every time the menubar is activated.
|
|
|
572 The filter function is passed the list of menu items in
|
|
|
573 the submenu and must return the modified list to be
|
|
|
574 actually used. The filter MUST NOT destructively modify
|
|
|
575 the list of menu items passed to it. It is called only
|
|
|
576 when the menu is about to be displayed, so other menus
|
|
|
577 may already be displayed. Vile and terrible things will
|
|
|
578 happen if a menu filter function changes the current
|
|
|
579 buffer, window, or frame. It also should not raise,
|
|
|
580 lower, or iconify any frames. Basically, the filter
|
|
|
581 function should have no side-effects.
|
|
428
|
582
|
|
|
583 :key-sequence keys Used in FSF Emacs as an hint to an equivalent keybinding.
|
|
442
|
584 Ignored by XEmacs for easymenu.el compatibility.
|
|
|
585 (XEmacs computes this information automatically.)
|
|
428
|
586
|
|
|
587 For example:
|
|
|
588
|
|
442
|
589 ("%_File"
|
|
428
|
590 :filter file-menu-filter ; file-menu-filter is a function that takes
|
|
|
591 ; one argument (a list of menu items) and
|
|
|
592 ; returns a list of menu items
|
|
442
|
593 [ "Save %_As..." write-file t ]
|
|
|
594 [ "%_Revert Buffer" revert-buffer (buffer-modified-p) ]
|
|
|
595 [ "R%_ead Only" toggle-read-only :style toggle
|
|
428
|
596 :selected buffer-read-only ]
|
|
|
597 )
|
|
|
598
|
|
442
|
599 See menubar-items.el for many more examples.
|
|
428
|
600
|
|
|
601 After the menubar is clicked upon, but before any menus are popped up,
|
|
|
602 the functions on the `activate-menubar-hook' are invoked to make top-level
|
|
|
603 changes to the menus and menubar. Note, however, that the use of menu
|
|
|
604 filters (using the :filter keyword) is usually a more efficient way to
|
|
442
|
605 dynamically alter or sensitize menus. */, menubar_variable_changed);
|
|
428
|
606
|
|
|
607 Vcurrent_menubar = Qnil;
|
|
|
608
|
|
|
609 DEFVAR_LISP ("activate-menubar-hook", &Vactivate_menubar_hook /*
|
|
|
610 Function or functions called before a menubar menu is pulled down.
|
|
|
611 These functions are called with no arguments, and should interrogate and
|
|
|
612 modify the value of `current-menubar' as desired.
|
|
|
613
|
|
|
614 The functions on this hook are invoked after the mouse goes down, but before
|
|
|
615 the menu is mapped, and may be used to activate, deactivate, add, or delete
|
|
|
616 items from the menus. However, it is probably the case that using a :filter
|
|
|
617 keyword in a submenu would be a more efficient way of updating menus. See
|
|
|
618 the documentation of `current-menubar'.
|
|
|
619
|
|
|
620 These functions may return the symbol `t' to assert that they have made
|
|
|
621 no changes to the menubar. If any other value is returned, the menubar is
|
|
|
622 recomputed. If `t' is returned but the menubar has been changed, then the
|
|
|
623 changes may not show up right away. Returning `nil' when the menubar has
|
|
|
624 not changed is not so bad; more computation will be done, but redisplay of
|
|
|
625 the menubar will still be performed optimally.
|
|
|
626 */ );
|
|
|
627 Vactivate_menubar_hook = Qnil;
|
|
563
|
628 DEFSYMBOL (Qactivate_menubar_hook);
|
|
428
|
629
|
|
|
630 DEFVAR_BOOL ("menubar-show-keybindings", &menubar_show_keybindings /*
|
|
|
631 If true, the menubar will display keyboard equivalents.
|
|
|
632 If false, only the command names will be displayed.
|
|
|
633 */ );
|
|
|
634 menubar_show_keybindings = 1;
|
|
|
635
|
|
|
636 DEFVAR_LISP_MAGIC ("menubar-configuration", &Vmenubar_configuration /*
|
|
|
637 A list of symbols, against which the value of the :config tag for each
|
|
|
638 menubar item will be compared. If a menubar item has a :config tag, then
|
|
|
639 it is omitted from the menubar if that tag is not a member of the
|
|
|
640 `menubar-configuration' list.
|
|
|
641 */ , menubar_variable_changed);
|
|
|
642 Vmenubar_configuration = Qnil;
|
|
|
643
|
|
|
644 DEFVAR_LISP ("menubar-pointer-glyph", &Vmenubar_pointer_glyph /*
|
|
|
645 *The shape of the mouse-pointer when over the menubar.
|
|
|
646 This is a glyph; use `set-glyph-image' to change it.
|
|
|
647 If unspecified in a particular domain, the window-system-provided
|
|
|
648 default pointer is used.
|
|
|
649 */ );
|
|
|
650
|
|
442
|
651 DEFVAR_LISP ("menu-accelerator-prefix", &Vmenu_accelerator_prefix /*
|
|
|
652 Prefix key(s) that must be typed before menu accelerators will be activated.
|
|
|
653 Set this to a value acceptable by define-key.
|
|
|
654
|
|
|
655 NOTE: This currently only has any effect under X Windows.
|
|
|
656 */ );
|
|
|
657 Vmenu_accelerator_prefix = Qnil;
|
|
|
658
|
|
|
659 DEFVAR_LISP ("menu-accelerator-modifiers", &Vmenu_accelerator_modifiers /*
|
|
|
660 Modifier keys which must be pressed to get to the top level menu accelerators.
|
|
|
661 This is a list of modifier key symbols. All modifier keys must be held down
|
|
|
662 while a valid menu accelerator key is pressed in order for the top level
|
|
|
663 menu to become active.
|
|
|
664
|
|
|
665 NOTE: This currently only has any effect under X Windows.
|
|
|
666
|
|
|
667 See also menu-accelerator-enabled and menu-accelerator-prefix.
|
|
|
668 */ );
|
|
|
669 Vmenu_accelerator_modifiers = list1 (Qmeta);
|
|
|
670
|
|
|
671 DEFVAR_LISP ("menu-accelerator-enabled", &Vmenu_accelerator_enabled /*
|
|
|
672 Whether menu accelerator keys can cause the menubar to become active.
|
|
|
673 If 'menu-force or 'menu-fallback, then menu accelerator keys can
|
|
|
674 be used to activate the top level menu. Once the menubar becomes active, the
|
|
|
675 accelerator keys can be used regardless of the value of this variable.
|
|
|
676
|
|
|
677 menu-force is used to indicate that the menu accelerator key takes
|
|
|
678 precedence over bindings in the current keymap(s). menu-fallback means
|
|
|
679 that bindings in the current keymap take precedence over menu accelerator keys.
|
|
|
680 Thus a top level menu with an accelerator of "T" would be activated on a
|
|
|
681 keypress of Meta-t if menu-accelerator-enabled is menu-force.
|
|
|
682 However, if menu-accelerator-enabled is menu-fallback, then
|
|
|
683 Meta-t will not activate the menubar and will instead run the function
|
|
|
684 transpose-words, to which it is normally bound.
|
|
|
685
|
|
|
686 See also menu-accelerator-modifiers and menu-accelerator-prefix.
|
|
|
687 */ );
|
|
|
688 Vmenu_accelerator_enabled = Qnil;
|
|
|
689
|
|
|
690 DEFVAR_LISP ("menu-accelerator-map", &Vmenu_accelerator_map /*
|
|
|
691 Keymap for use when the menubar is active.
|
|
|
692 The actions menu-quit, menu-up, menu-down, menu-left, menu-right,
|
|
|
693 menu-select and menu-escape can be mapped to keys in this map.
|
|
|
694 NOTE: This currently only has any effect under X Windows.
|
|
|
695
|
|
|
696 menu-quit Immediately deactivate the menubar and any open submenus without
|
|
|
697 selecting an item.
|
|
|
698 menu-up Move the menu cursor up one row in the current menu. If the
|
|
|
699 move extends past the top of the menu, wrap around to the bottom.
|
|
|
700 menu-down Move the menu cursor down one row in the current menu. If the
|
|
|
701 move extends past the bottom of the menu, wrap around to the top.
|
|
|
702 If executed while the cursor is in the top level menu, move down
|
|
|
703 into the selected menu.
|
|
|
704 menu-left Move the cursor from a submenu into the parent menu. If executed
|
|
|
705 while the cursor is in the top level menu, move the cursor to the
|
|
|
706 left. If the move extends past the left edge of the menu, wrap
|
|
|
707 around to the right edge.
|
|
|
708 menu-right Move the cursor into a submenu. If the cursor is located in the
|
|
|
709 top level menu or is not currently on a submenu heading, then move
|
|
|
710 the cursor to the next top level menu entry. If the move extends
|
|
|
711 past the right edge of the menu, wrap around to the left edge.
|
|
|
712 menu-select Activate the item under the cursor. If the cursor is located on
|
|
|
713 a submenu heading, then move the cursor into the submenu.
|
|
|
714 menu-escape Pop up to the next level of menus. Moves from a submenu into its
|
|
|
715 parent menu. From the top level menu, this deactivates the
|
|
|
716 menubar.
|
|
|
717
|
|
|
718 This keymap can also contain normal key-command bindings, in which case the
|
|
|
719 menubar is deactivated and the corresponding command is executed.
|
|
|
720
|
|
|
721 The action bindings used by the menu accelerator code are designed to mimic
|
|
|
722 the actions of menu traversal keys in a commonly used PC operating system.
|
|
|
723 */ );
|
|
|
724
|
|
428
|
725 Fprovide (intern ("menubar"));
|
|
464
|
726 Fprovide (intern ("menu-accelerator-support"));
|
|
428
|
727 }
|
|
|
728
|
|
|
729 void
|
|
|
730 specifier_vars_of_menubar (void)
|
|
|
731 {
|
|
|
732 DEFVAR_SPECIFIER ("menubar-visible-p", &Vmenubar_visible_p /*
|
|
|
733 *Whether the menubar is visible.
|
|
|
734 This is a specifier; use `set-specifier' to change it.
|
|
|
735 */ );
|
|
|
736 Vmenubar_visible_p = Fmake_specifier (Qboolean);
|
|
|
737
|
|
|
738 set_specifier_fallback (Vmenubar_visible_p, list1 (Fcons (Qnil, Qt)));
|
|
|
739 set_specifier_caching (Vmenubar_visible_p,
|
|
438
|
740 offsetof (struct window, menubar_visible_p),
|
|
428
|
741 menubar_visible_p_changed,
|
|
438
|
742 offsetof (struct frame, menubar_visible_p),
|
|
444
|
743 menubar_visible_p_changed_in_frame, 0);
|
|
428
|
744 }
|
|
|
745
|
|
|
746 void
|
|
|
747 complex_vars_of_menubar (void)
|
|
|
748 {
|
|
|
749 Vmenubar_pointer_glyph = Fmake_glyph_internal (Qpointer);
|
|
442
|
750
|
|
|
751 Vmenu_accelerator_map = Fmake_keymap (Qnil);
|
|
428
|
752 }
|
