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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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1279
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62 int in_menu_callback;
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428
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63
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64 Lisp_Object Vmenubar_pointer_glyph;
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65
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442
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66 /* prefix key(s) that must match in order to activate menu.
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67 This is ugly. fix me.
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68 */
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69 Lisp_Object Vmenu_accelerator_prefix;
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70
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71 /* list of modifier keys to match accelerator for top level menus */
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72 Lisp_Object Vmenu_accelerator_modifiers;
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73
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74 /* whether menu accelerators are enabled */
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75 Lisp_Object Vmenu_accelerator_enabled;
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76
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77 /* keymap for auxiliary menu accelerator functions */
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78 Lisp_Object Vmenu_accelerator_map;
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79
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80 Lisp_Object Qmenu_force;
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81 Lisp_Object Qmenu_fallback;
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82 Lisp_Object Qmenu_quit;
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83 Lisp_Object Qmenu_up;
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84 Lisp_Object Qmenu_down;
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85 Lisp_Object Qmenu_left;
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86 Lisp_Object Qmenu_right;
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87 Lisp_Object Qmenu_select;
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88 Lisp_Object Qmenu_escape;
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89
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428
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90 static int
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91 menubar_variable_changed (Lisp_Object sym, Lisp_Object *val,
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92 Lisp_Object in_object, int flags)
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93 {
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94 MARK_MENUBAR_CHANGED;
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95 return 0;
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96 }
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97
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98 void
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99 update_frame_menubars (struct frame *f)
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100 {
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101 if (f->menubar_changed || f->windows_changed)
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102 MAYBE_FRAMEMETH (f, update_frame_menubars, (f));
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103
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104 f->menubar_changed = 0;
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105 }
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106
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107 void
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108 free_frame_menubars (struct frame *f)
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109 {
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110 /* If we had directly allocated any memory for the menubars instead
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111 of using all Lisp_Objects this is where we would now free it. */
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112
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113 MAYBE_FRAMEMETH (f, free_frame_menubars, (f));
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114 }
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115
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116 static void
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117 menubar_visible_p_changed (Lisp_Object specifier, struct window *w,
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118 Lisp_Object oldval)
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119 {
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120 MARK_MENUBAR_CHANGED;
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121 }
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122
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123 static void
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124 menubar_visible_p_changed_in_frame (Lisp_Object specifier, struct frame *f,
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125 Lisp_Object oldval)
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126 {
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127 update_frame_menubars (f);
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128 }
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129
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130 Lisp_Object
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442
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131 current_frame_menubar (const struct frame* f)
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428
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132 {
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133 struct window *w = XWINDOW (FRAME_LAST_NONMINIBUF_WINDOW (f));
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134 return symbol_value_in_buffer (Qcurrent_menubar, w->buffer);
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135 }
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136
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137 Lisp_Object
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138 menu_parse_submenu_keywords (Lisp_Object desc, Lisp_Object gui_item)
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139 {
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442
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140 Lisp_Gui_Item *pgui_item = XGUI_ITEM (gui_item);
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428
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141
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142 /* Menu descriptor should be a list */
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143 CHECK_CONS (desc);
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144
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145 /* First element may be menu name, although can be omitted.
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146 Let's think that if stuff begins with anything than a keyword
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147 or a list (submenu), this is a menu name, expected to be a string */
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148 if (!KEYWORDP (XCAR (desc)) && !CONSP (XCAR (desc)))
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149 {
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150 CHECK_STRING (XCAR (desc));
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151 pgui_item->name = XCAR (desc);
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152 desc = XCDR (desc);
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153 if (!NILP (desc))
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154 CHECK_CONS (desc);
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155 }
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156
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157 /* Walk along all key-value pairs */
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158 while (!NILP(desc) && KEYWORDP (XCAR (desc)))
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159 {
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160 Lisp_Object key, val;
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161 key = XCAR (desc);
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162 desc = XCDR (desc);
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163 CHECK_CONS (desc);
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164 val = XCAR (desc);
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165 desc = XCDR (desc);
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166 if (!NILP (desc))
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167 CHECK_CONS (desc);
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168 gui_item_add_keyval_pair (gui_item, key, val, ERROR_ME);
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169 }
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170
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171 /* Return the rest - supposed to be a list of items */
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172 return desc;
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173 }
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174
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175 DEFUN ("menu-find-real-submenu", Fmenu_find_real_submenu, 2, 2, 0, /*
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176 Find a submenu descriptor within DESC by following PATH.
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177 This function finds a submenu descriptor, either from the description
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178 DESC or generated by a filter within DESC. The function regards :config
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179 and :included keywords in the DESC, and expands submenus along the
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180 PATH using :filter functions. Return value is a descriptor for the
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181 submenu, NOT expanded and NOT checked against :config and :included.
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182 Also, individual menu items are not looked for, only submenus.
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183
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184 See also 'find-menu-item'.
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185 */
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186 (desc, path))
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187 {
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188 Lisp_Object path_entry, submenu_desc, submenu;
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442
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189 struct gcpro gcpro1, gcpro2;
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428
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190 Lisp_Object gui_item = allocate_gui_item ();
|
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440
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191 Lisp_Gui_Item* pgui_item = XGUI_ITEM (gui_item);
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428
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192
|
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442
|
193 GCPRO2 (gui_item, desc);
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428
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194
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195 EXTERNAL_LIST_LOOP (path_entry, path)
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196 {
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197 /* Verify that DESC describes a menu, not single item */
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198 if (!CONSP (desc))
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199 RETURN_UNGCPRO (Qnil);
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200
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201 /* Parse this menu */
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202 desc = menu_parse_submenu_keywords (desc, gui_item);
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203
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204 /* Check that this (sub)menu is active */
|
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1913
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205 if (!gui_item_active_p (gui_item))
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428
|
206 RETURN_UNGCPRO (Qnil);
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207
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208 /* Apply :filter */
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209 if (!NILP (pgui_item->filter))
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210 desc = call1 (pgui_item->filter, desc);
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211
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212 /* Find the next menu on the path inside this one */
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213 EXTERNAL_LIST_LOOP (submenu_desc, desc)
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214 {
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215 submenu = XCAR (submenu_desc);
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216 if (CONSP (submenu)
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217 && STRINGP (XCAR (submenu))
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218 && !NILP (Fstring_equal (XCAR (submenu), XCAR (path_entry))))
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219 {
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220 desc = submenu;
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221 goto descend;
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222 }
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223 }
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224 /* Submenu not found */
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225 RETURN_UNGCPRO (Qnil);
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226
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227 descend:
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228 /* Prepare for the next iteration */
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229 gui_item_init (gui_item);
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230 }
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231
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232 /* We have successfully descended down the end of the path */
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233 UNGCPRO;
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234 return desc;
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235 }
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236
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237 DEFUN ("popup-menu", Fpopup_menu, 1, 2, 0, /*
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444
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238 Pop up the menu described by MENU-DESCRIPTION.
|
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428
|
239 A menu description is a list of menu items, strings, and submenus.
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240
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241 The first element of a menu must be a string, which is the name of the menu.
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242 This is the string that will be displayed in the parent menu, if any. For
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243 toplevel menus, it is ignored. This string is not displayed in the menu
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244 itself.
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245
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246 If an element of a menu is a string, then that string will be presented in
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247 the menu as unselectable text.
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248
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249 If an element of a menu is a string consisting solely of hyphens, then that
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250 item will be presented as a solid horizontal line.
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251
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252 If an element of a menu is a list, it is treated as a submenu. The name of
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253 that submenu (the first element in the list) will be used as the name of the
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254 item representing this menu on the parent.
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255
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256 Otherwise, the element must be a vector, which describes a menu item.
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257 A menu item can have any of the following forms:
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258
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259 [ "name" callback <active-p> ]
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260 [ "name" callback <active-p> <suffix> ]
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261 [ "name" callback :<keyword> <value> :<keyword> <value> ... ]
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|
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262
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263 The name is the string to display on the menu; it is filtered through the
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|
|
264 resource database, so it is possible for resources to override what string
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|
|
265 is actually displayed.
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|
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266
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|
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267 If the `callback' of a menu item is a symbol, then it must name a command.
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|
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268 It will be invoked with `call-interactively'. If it is a list, then it is
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|
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269 evaluated with `eval'.
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270
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|
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271 The possible keywords are this:
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272
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273 :active <form> Same as <active-p> in the first two forms: the
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|
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274 expression is evaluated just before the menu is
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275 displayed, and the menu will be selectable only if
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276 the result is non-nil.
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277
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278 :suffix <form> Same as <suffix> in the second form: the expression
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|
|
279 is evaluated just before the menu is displayed and
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|
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280 resulting string is appended to the displayed name,
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|
281 providing a convenient way of adding the name of a
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|
|
282 command's ``argument'' to the menu, like
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283 ``Kill Buffer NAME''.
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284
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285 :keys "string" Normally, the keyboard equivalents of commands in
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286 menus are displayed when the `callback' is a symbol.
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287 This can be used to specify keys for more complex menu
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|
|
288 items. It is passed through `substitute-command-keys'
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289 first.
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290
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|
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291 :style <style> Specifies what kind of object this menu item is:
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292
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|
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293 nil A normal menu item.
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294 toggle A toggle button.
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295 radio A radio button.
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296
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|
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297 The only difference between toggle and radio buttons is
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|
|
298 how they are displayed. But for consistency, a toggle
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|
|
299 button should be used when there is one option whose
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|
|
300 value can be turned on or off, and radio buttons should
|
|
|
301 be used when there is a set of mutually exclusive
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|
|
302 options. When using a group of radio buttons, you
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|
|
303 should arrange for no more than one to be marked as
|
|
|
304 selected at a time.
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|
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305
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|
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306 :selected <form> Meaningful only when STYLE is `toggle' or `radio'.
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|
|
307 This specifies whether the button will be in the
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|
|
308 selected or unselected state.
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|
|
309
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|
|
310 For example:
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|
311
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|
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312 [ "Save As..." write-file t ]
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|
|
313 [ "Revert Buffer" revert-buffer (buffer-modified-p) ]
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|
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314 [ "Read Only" toggle-read-only :style toggle :selected buffer-read-only ]
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315
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|
|
316 See menubar.el for many more examples.
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|
|
317 */
|
|
444
|
318 (menu_description, event))
|
|
428
|
319 {
|
|
444
|
320 struct frame *f = decode_frame (Qnil);
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|
|
321 MAYBE_FRAMEMETH (f, popup_menu, (menu_description, event));
|
|
428
|
322 return Qnil;
|
|
|
323 }
|
|
|
324
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|
|
325 DEFUN ("normalize-menu-item-name", Fnormalize_menu_item_name, 1, 2, 0, /*
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|
|
326 Convert a menu item name string into normal form, and return the new string.
|
|
|
327 Menu item names should be converted to normal form before being compared.
|
|
442
|
328 This removes %_'s (accelerator indications) and converts %% to %.
|
|
428
|
329 */
|
|
|
330 (name, buffer))
|
|
|
331 {
|
|
|
332 struct buffer *buf = decode_buffer (buffer, 0);
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|
|
333 Charcount end;
|
|
|
334 int i;
|
|
867
|
335 Ibyte *name_data;
|
|
|
336 Ibyte *string_result;
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|
|
337 Ibyte *string_result_ptr;
|
|
|
338 Ichar elt;
|
|
428
|
339 int expecting_underscore = 0;
|
|
|
340
|
|
|
341 CHECK_STRING (name);
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|
|
342
|
|
826
|
343 end = string_char_length (name);
|
|
793
|
344 name_data = XSTRING_DATA (name);
|
|
428
|
345
|
|
867
|
346 string_result = (Ibyte *) ALLOCA (end * MAX_ICHAR_LEN);
|
|
428
|
347 string_result_ptr = string_result;
|
|
|
348 for (i = 0; i < end; i++)
|
|
|
349 {
|
|
867
|
350 elt = itext_ichar (name_data);
|
|
428
|
351 elt = DOWNCASE (buf, elt);
|
|
|
352 if (expecting_underscore)
|
|
|
353 {
|
|
|
354 expecting_underscore = 0;
|
|
|
355 switch (elt)
|
|
|
356 {
|
|
|
357 case '%':
|
|
|
358 /* Allow `%%' to mean `%'. */
|
|
867
|
359 string_result_ptr += set_itext_ichar (string_result_ptr, '%');
|
|
428
|
360 break;
|
|
|
361 case '_':
|
|
|
362 break;
|
|
|
363 default:
|
|
867
|
364 string_result_ptr += set_itext_ichar (string_result_ptr, '%');
|
|
|
365 string_result_ptr += set_itext_ichar (string_result_ptr, elt);
|
|
428
|
366 }
|
|
|
367 }
|
|
|
368 else if (elt == '%')
|
|
|
369 expecting_underscore = 1;
|
|
|
370 else
|
|
867
|
371 string_result_ptr += set_itext_ichar (string_result_ptr, elt);
|
|
|
372 INC_IBYTEPTR (name_data);
|
|
428
|
373 }
|
|
|
374
|
|
442
|
375 if (string_result_ptr - string_result == XSTRING_LENGTH (name)
|
|
|
376 && !memcmp (string_result, XSTRING_DATA (name), XSTRING_LENGTH (name)))
|
|
|
377 return name;
|
|
|
378
|
|
428
|
379 return make_string (string_result, string_result_ptr - string_result);
|
|
|
380 }
|
|
|
381
|
|
|
382 void
|
|
|
383 syms_of_menubar (void)
|
|
|
384 {
|
|
563
|
385 DEFSYMBOL (Qcurrent_menubar);
|
|
442
|
386
|
|
563
|
387 DEFSYMBOL (Qmenu_force);
|
|
|
388 DEFSYMBOL (Qmenu_fallback);
|
|
442
|
389
|
|
563
|
390 DEFSYMBOL (Qmenu_quit);
|
|
|
391 DEFSYMBOL (Qmenu_up);
|
|
|
392 DEFSYMBOL (Qmenu_down);
|
|
|
393 DEFSYMBOL (Qmenu_left);
|
|
|
394 DEFSYMBOL (Qmenu_right);
|
|
|
395 DEFSYMBOL (Qmenu_select);
|
|
|
396 DEFSYMBOL (Qmenu_escape);
|
|
442
|
397
|
|
428
|
398 DEFSUBR (Fpopup_menu);
|
|
|
399 DEFSUBR (Fnormalize_menu_item_name);
|
|
|
400 DEFSUBR (Fmenu_find_real_submenu);
|
|
|
401 }
|
|
|
402
|
|
|
403 void
|
|
|
404 vars_of_menubar (void)
|
|
|
405 {
|
|
440
|
406 /* put in Vblank_menubar a menubar value which has no visible
|
|
|
407 * items. This is a bit tricky due to various quirks. We
|
|
|
408 * could use '(["" nil nil]), but this is apparently equivalent
|
|
|
409 * to '(nil), and a new frame created with this menubar will
|
|
|
410 * get a vertically-squished menubar. If we use " " as the
|
|
|
411 * button title instead of "", we get an etched button border.
|
|
|
412 * So we use
|
|
|
413 * '(("No active menubar" ["" nil nil]))
|
|
|
414 * which creates a menu whose title is "No active menubar",
|
|
|
415 * and this works fine.
|
|
|
416 */
|
|
428
|
417
|
|
771
|
418 Vblank_menubar = list1 (list2 (build_msg_string ("No active menubar"),
|
|
440
|
419 vector3 (build_string (""), Qnil, Qnil)));
|
|
|
420 staticpro (&Vblank_menubar);
|
|
428
|
421
|
|
|
422 DEFVAR_BOOL ("popup-menu-titles", &popup_menu_titles /*
|
|
|
423 If true, popup menus will have title bars at the top.
|
|
|
424 */ );
|
|
|
425 popup_menu_titles = 1;
|
|
|
426
|
|
|
427 /* #### Replace current menubar with a specifier. */
|
|
|
428
|
|
|
429 /* All C code must access the menubar via Qcurrent_menubar
|
|
|
430 because it can be buffer-local. Note that Vcurrent_menubar
|
|
|
431 doesn't need to exist at all, except for the magic function. */
|
|
|
432
|
|
|
433 DEFVAR_LISP_MAGIC ("current-menubar", &Vcurrent_menubar /*
|
|
|
434 The current menubar. This may be buffer-local.
|
|
|
435
|
|
|
436 When the menubar is changed, the function `set-menubar-dirty-flag' has to
|
|
|
437 be called for the menubar to be updated on the frame. See `set-menubar'
|
|
|
438 and `set-buffer-menubar'.
|
|
|
439
|
|
|
440 A menubar is a list of menus and menu-items.
|
|
|
441 A menu is a list of menu items, keyword-value pairs, strings, and submenus.
|
|
|
442
|
|
|
443 The first element of a menu must be a string, which is the name of the menu.
|
|
|
444 This is the string that will be displayed in the parent menu, if any. For
|
|
|
445 toplevel menus, it is ignored. This string is not displayed in the menu
|
|
|
446 itself.
|
|
|
447
|
|
442
|
448 Menu accelerators can be indicated in the string by putting the
|
|
|
449 sequence "%_" before the character corresponding to the key that will
|
|
|
450 invoke the menu or menu item. Uppercase and lowercase accelerators
|
|
|
451 are equivalent. The sequence "%%" is also special, and is translated
|
|
|
452 into a single %.
|
|
|
453
|
|
|
454 If no menu accelerator is present in the string, XEmacs will act as if
|
|
|
455 the first character has been tagged as an accelerator.
|
|
|
456
|
|
|
457 Immediately following the name string of the menu, various optional
|
|
|
458 keyword-value pairs are permitted: currently, :filter, :active, :included,
|
|
|
459 and :config. (See below.)
|
|
428
|
460
|
|
|
461 If an element of a menu (or menubar) is a string, then that string will be
|
|
|
462 presented as unselectable text.
|
|
|
463
|
|
|
464 If an element of a menu is a string consisting solely of hyphens, then that
|
|
|
465 item will be presented as a solid horizontal line.
|
|
|
466
|
|
442
|
467 If an element of a menu is a string beginning with "--:", it will be
|
|
|
468 presented as a line whose appearance is controlled by the rest of the
|
|
|
469 text in the string. The allowed line specs are system-dependent, and
|
|
|
470 currently work only under X Windows (with Lucid and Motif menubars);
|
|
|
471 otherwise, a solid horizontal line is presented, as if the string were
|
|
|
472 all hyphens.
|
|
|
473
|
|
|
474 The possibilities are:
|
|
|
475
|
|
|
476 "--:singleLine"
|
|
|
477 "--:doubleLine"
|
|
|
478 "--:singleDashedLine"
|
|
|
479 "--:doubleDashedLine"
|
|
|
480 "--:noLine"
|
|
|
481 "--:shadowEtchedIn"
|
|
|
482 "--:shadowEtchedOut"
|
|
|
483 "--:shadowEtchedInDash"
|
|
|
484 "--:shadowEtchedOutDash"
|
|
|
485 "--:shadowDoubleEtchedIn" (Lucid menubars only)
|
|
|
486 "--:shadowDoubleEtchedOut" (Lucid menubars only)
|
|
|
487 "--:shadowDoubleEtchedInDash" (Lucid menubars only)
|
|
|
488 "--:shadowDoubleEtchedOutDash" (Lucid menubars only)
|
|
|
489
|
|
428
|
490 If an element of a menu is a list, it is treated as a submenu. The name of
|
|
|
491 that submenu (the first element in the list) will be used as the name of the
|
|
|
492 item representing this menu on the parent.
|
|
|
493
|
|
|
494 If an element of a menubar is `nil', then it is used to represent the
|
|
|
495 division between the set of menubar-items which are flushleft and those
|
|
|
496 which are flushright.
|
|
|
497
|
|
|
498 Otherwise, the element must be a vector, which describes a menu item.
|
|
442
|
499 A menu item is of the following form:
|
|
|
500
|
|
|
501 [ "name" callback :<keyword> <value> :<keyword> <value> ... ]
|
|
|
502
|
|
|
503 The following forms are also accepted for compatibility, but deprecated:
|
|
428
|
504
|
|
|
505 [ "name" callback <active-p> ]
|
|
|
506 [ "name" callback <active-p> <suffix> ]
|
|
|
507
|
|
|
508 The name is the string to display on the menu; it is filtered through the
|
|
|
509 resource database, so it is possible for resources to override what string
|
|
442
|
510 is actually displayed. Menu accelerator indicators (the sequence `%_') are
|
|
|
511 also processed; see above. If the name is not a string, it will be
|
|
|
512 evaluated with `eval', and the result should be a string.
|
|
428
|
513
|
|
|
514 If the `callback' of a menu item is a symbol, then it must name a command.
|
|
|
515 It will be invoked with `call-interactively'. If it is a list, then it is
|
|
|
516 evaluated with `eval'.
|
|
|
517
|
|
442
|
518 In the deprecated forms, <active-p> is equivalent to using the :active
|
|
|
519 keyword, and <suffix> is equivalent to using the :suffix keyword.
|
|
428
|
520
|
|
442
|
521 The possible keywords are:
|
|
|
522
|
|
|
523 :active <form> The expression is evaluated just before the menu is
|
|
428
|
524 displayed, and the menu will be selectable only if
|
|
|
525 the result is non-nil.
|
|
|
526
|
|
442
|
527 :suffix <form> The expression is evaluated just before the menu is
|
|
|
528 displayed and the resulting string is appended to
|
|
|
529 the displayed name, providing a convenient way of
|
|
|
530 adding the name of a command's ``argument'' to the
|
|
|
531 menu, like ``Kill Buffer NAME''.
|
|
428
|
532
|
|
|
533 :keys "string" Normally, the keyboard equivalents of commands in
|
|
|
534 menus are displayed when the `callback' is a symbol.
|
|
|
535 This can be used to specify keys for more complex menu
|
|
|
536 items. It is passed through `substitute-command-keys'
|
|
|
537 first.
|
|
|
538
|
|
|
539 :style <style> Specifies what kind of object this menu item is:
|
|
|
540
|
|
|
541 nil A normal menu item.
|
|
|
542 toggle A toggle button.
|
|
|
543 radio A radio button.
|
|
|
544 button A menubar button.
|
|
|
545
|
|
|
546 The only difference between toggle and radio buttons is
|
|
|
547 how they are displayed. But for consistency, a toggle
|
|
|
548 button should be used when there is one option whose
|
|
|
549 value can be turned on or off, and radio buttons should
|
|
|
550 be used when there is a set of mutually exclusive
|
|
|
551 options. When using a group of radio buttons, you
|
|
|
552 should arrange for no more than one to be marked as
|
|
|
553 selected at a time.
|
|
|
554
|
|
|
555 :selected <form> Meaningful only when STYLE is `toggle', `radio' or
|
|
|
556 `button'. This specifies whether the button will be in
|
|
|
557 the selected or unselected state.
|
|
|
558
|
|
|
559 :included <form> This can be used to control the visibility of a menu or
|
|
|
560 menu item. The form is evaluated and the menu or menu
|
|
|
561 item is only displayed if the result is non-nil.
|
|
|
562
|
|
|
563 :config <symbol> This is an efficient shorthand for
|
|
|
564 :included (memq symbol menubar-configuration)
|
|
|
565 See the variable `menubar-configuration'.
|
|
|
566
|
|
442
|
567 :filter <function> A menu filter can only be used at the beginning of a
|
|
|
568 submenu description (i.e. not in a menu item itself).
|
|
|
569 (Remember that most of the keywords can take evaluated
|
|
|
570 expressions as well as constants.) The filter is used to
|
|
|
571 incrementally create a submenu only when it is selected
|
|
|
572 by the user and not every time the menubar is activated.
|
|
|
573 The filter function is passed the list of menu items in
|
|
|
574 the submenu and must return the modified list to be
|
|
|
575 actually used. The filter MUST NOT destructively modify
|
|
|
576 the list of menu items passed to it. It is called only
|
|
|
577 when the menu is about to be displayed, so other menus
|
|
|
578 may already be displayed. Vile and terrible things will
|
|
|
579 happen if a menu filter function changes the current
|
|
|
580 buffer, window, or frame. It also should not raise,
|
|
|
581 lower, or iconify any frames. Basically, the filter
|
|
|
582 function should have no side-effects.
|
|
428
|
583
|
|
|
584 :key-sequence keys Used in FSF Emacs as an hint to an equivalent keybinding.
|
|
442
|
585 Ignored by XEmacs for easymenu.el compatibility.
|
|
|
586 (XEmacs computes this information automatically.)
|
|
428
|
587
|
|
|
588 For example:
|
|
|
589
|
|
442
|
590 ("%_File"
|
|
428
|
591 :filter file-menu-filter ; file-menu-filter is a function that takes
|
|
|
592 ; one argument (a list of menu items) and
|
|
|
593 ; returns a list of menu items
|
|
442
|
594 [ "Save %_As..." write-file t ]
|
|
|
595 [ "%_Revert Buffer" revert-buffer (buffer-modified-p) ]
|
|
|
596 [ "R%_ead Only" toggle-read-only :style toggle
|
|
428
|
597 :selected buffer-read-only ]
|
|
|
598 )
|
|
|
599
|
|
442
|
600 See menubar-items.el for many more examples.
|
|
428
|
601
|
|
|
602 After the menubar is clicked upon, but before any menus are popped up,
|
|
|
603 the functions on the `activate-menubar-hook' are invoked to make top-level
|
|
|
604 changes to the menus and menubar. Note, however, that the use of menu
|
|
|
605 filters (using the :filter keyword) is usually a more efficient way to
|
|
442
|
606 dynamically alter or sensitize menus. */, menubar_variable_changed);
|
|
428
|
607
|
|
|
608 Vcurrent_menubar = Qnil;
|
|
|
609
|
|
|
610 DEFVAR_LISP ("activate-menubar-hook", &Vactivate_menubar_hook /*
|
|
|
611 Function or functions called before a menubar menu is pulled down.
|
|
|
612 These functions are called with no arguments, and should interrogate and
|
|
|
613 modify the value of `current-menubar' as desired.
|
|
|
614
|
|
|
615 The functions on this hook are invoked after the mouse goes down, but before
|
|
|
616 the menu is mapped, and may be used to activate, deactivate, add, or delete
|
|
|
617 items from the menus. However, it is probably the case that using a :filter
|
|
|
618 keyword in a submenu would be a more efficient way of updating menus. See
|
|
|
619 the documentation of `current-menubar'.
|
|
|
620
|
|
|
621 These functions may return the symbol `t' to assert that they have made
|
|
|
622 no changes to the menubar. If any other value is returned, the menubar is
|
|
|
623 recomputed. If `t' is returned but the menubar has been changed, then the
|
|
|
624 changes may not show up right away. Returning `nil' when the menubar has
|
|
|
625 not changed is not so bad; more computation will be done, but redisplay of
|
|
|
626 the menubar will still be performed optimally.
|
|
|
627 */ );
|
|
|
628 Vactivate_menubar_hook = Qnil;
|
|
563
|
629 DEFSYMBOL (Qactivate_menubar_hook);
|
|
428
|
630
|
|
|
631 DEFVAR_BOOL ("menubar-show-keybindings", &menubar_show_keybindings /*
|
|
|
632 If true, the menubar will display keyboard equivalents.
|
|
|
633 If false, only the command names will be displayed.
|
|
|
634 */ );
|
|
|
635 menubar_show_keybindings = 1;
|
|
|
636
|
|
|
637 DEFVAR_LISP_MAGIC ("menubar-configuration", &Vmenubar_configuration /*
|
|
|
638 A list of symbols, against which the value of the :config tag for each
|
|
|
639 menubar item will be compared. If a menubar item has a :config tag, then
|
|
|
640 it is omitted from the menubar if that tag is not a member of the
|
|
|
641 `menubar-configuration' list.
|
|
|
642 */ , menubar_variable_changed);
|
|
|
643 Vmenubar_configuration = Qnil;
|
|
|
644
|
|
|
645 DEFVAR_LISP ("menubar-pointer-glyph", &Vmenubar_pointer_glyph /*
|
|
|
646 *The shape of the mouse-pointer when over the menubar.
|
|
|
647 This is a glyph; use `set-glyph-image' to change it.
|
|
|
648 If unspecified in a particular domain, the window-system-provided
|
|
|
649 default pointer is used.
|
|
|
650 */ );
|
|
|
651
|
|
442
|
652 DEFVAR_LISP ("menu-accelerator-prefix", &Vmenu_accelerator_prefix /*
|
|
|
653 Prefix key(s) that must be typed before menu accelerators will be activated.
|
|
|
654 Set this to a value acceptable by define-key.
|
|
|
655
|
|
|
656 NOTE: This currently only has any effect under X Windows.
|
|
|
657 */ );
|
|
|
658 Vmenu_accelerator_prefix = Qnil;
|
|
|
659
|
|
|
660 DEFVAR_LISP ("menu-accelerator-modifiers", &Vmenu_accelerator_modifiers /*
|
|
|
661 Modifier keys which must be pressed to get to the top level menu accelerators.
|
|
|
662 This is a list of modifier key symbols. All modifier keys must be held down
|
|
|
663 while a valid menu accelerator key is pressed in order for the top level
|
|
|
664 menu to become active.
|
|
|
665
|
|
|
666 NOTE: This currently only has any effect under X Windows.
|
|
|
667
|
|
|
668 See also menu-accelerator-enabled and menu-accelerator-prefix.
|
|
|
669 */ );
|
|
|
670 Vmenu_accelerator_modifiers = list1 (Qmeta);
|
|
|
671
|
|
|
672 DEFVAR_LISP ("menu-accelerator-enabled", &Vmenu_accelerator_enabled /*
|
|
|
673 Whether menu accelerator keys can cause the menubar to become active.
|
|
|
674 If 'menu-force or 'menu-fallback, then menu accelerator keys can
|
|
|
675 be used to activate the top level menu. Once the menubar becomes active, the
|
|
|
676 accelerator keys can be used regardless of the value of this variable.
|
|
|
677
|
|
|
678 menu-force is used to indicate that the menu accelerator key takes
|
|
|
679 precedence over bindings in the current keymap(s). menu-fallback means
|
|
|
680 that bindings in the current keymap take precedence over menu accelerator keys.
|
|
|
681 Thus a top level menu with an accelerator of "T" would be activated on a
|
|
|
682 keypress of Meta-t if menu-accelerator-enabled is menu-force.
|
|
|
683 However, if menu-accelerator-enabled is menu-fallback, then
|
|
|
684 Meta-t will not activate the menubar and will instead run the function
|
|
|
685 transpose-words, to which it is normally bound.
|
|
|
686
|
|
|
687 See also menu-accelerator-modifiers and menu-accelerator-prefix.
|
|
|
688 */ );
|
|
|
689 Vmenu_accelerator_enabled = Qnil;
|
|
|
690
|
|
|
691 DEFVAR_LISP ("menu-accelerator-map", &Vmenu_accelerator_map /*
|
|
|
692 Keymap for use when the menubar is active.
|
|
|
693 The actions menu-quit, menu-up, menu-down, menu-left, menu-right,
|
|
|
694 menu-select and menu-escape can be mapped to keys in this map.
|
|
|
695 NOTE: This currently only has any effect under X Windows.
|
|
|
696
|
|
|
697 menu-quit Immediately deactivate the menubar and any open submenus without
|
|
|
698 selecting an item.
|
|
|
699 menu-up Move the menu cursor up one row in the current menu. If the
|
|
|
700 move extends past the top of the menu, wrap around to the bottom.
|
|
|
701 menu-down Move the menu cursor down one row in the current menu. If the
|
|
|
702 move extends past the bottom of the menu, wrap around to the top.
|
|
|
703 If executed while the cursor is in the top level menu, move down
|
|
|
704 into the selected menu.
|
|
|
705 menu-left Move the cursor from a submenu into the parent menu. If executed
|
|
|
706 while the cursor is in the top level menu, move the cursor to the
|
|
|
707 left. If the move extends past the left edge of the menu, wrap
|
|
|
708 around to the right edge.
|
|
|
709 menu-right Move the cursor into a submenu. If the cursor is located in the
|
|
|
710 top level menu or is not currently on a submenu heading, then move
|
|
|
711 the cursor to the next top level menu entry. If the move extends
|
|
|
712 past the right edge of the menu, wrap around to the left edge.
|
|
|
713 menu-select Activate the item under the cursor. If the cursor is located on
|
|
|
714 a submenu heading, then move the cursor into the submenu.
|
|
|
715 menu-escape Pop up to the next level of menus. Moves from a submenu into its
|
|
|
716 parent menu. From the top level menu, this deactivates the
|
|
|
717 menubar.
|
|
|
718
|
|
|
719 This keymap can also contain normal key-command bindings, in which case the
|
|
|
720 menubar is deactivated and the corresponding command is executed.
|
|
|
721
|
|
|
722 The action bindings used by the menu accelerator code are designed to mimic
|
|
|
723 the actions of menu traversal keys in a commonly used PC operating system.
|
|
|
724 */ );
|
|
|
725
|
|
428
|
726 Fprovide (intern ("menubar"));
|
|
464
|
727 Fprovide (intern ("menu-accelerator-support"));
|
|
428
|
728 }
|
|
|
729
|
|
|
730 void
|
|
|
731 specifier_vars_of_menubar (void)
|
|
|
732 {
|
|
|
733 DEFVAR_SPECIFIER ("menubar-visible-p", &Vmenubar_visible_p /*
|
|
|
734 *Whether the menubar is visible.
|
|
|
735 This is a specifier; use `set-specifier' to change it.
|
|
|
736 */ );
|
|
|
737 Vmenubar_visible_p = Fmake_specifier (Qboolean);
|
|
|
738
|
|
|
739 set_specifier_fallback (Vmenubar_visible_p, list1 (Fcons (Qnil, Qt)));
|
|
|
740 set_specifier_caching (Vmenubar_visible_p,
|
|
438
|
741 offsetof (struct window, menubar_visible_p),
|
|
428
|
742 menubar_visible_p_changed,
|
|
438
|
743 offsetof (struct frame, menubar_visible_p),
|
|
444
|
744 menubar_visible_p_changed_in_frame, 0);
|
|
428
|
745 }
|
|
|
746
|
|
|
747 void
|
|
|
748 complex_vars_of_menubar (void)
|
|
|
749 {
|
|
|
750 Vmenubar_pointer_glyph = Fmake_glyph_internal (Qpointer);
|
|
442
|
751
|
|
|
752 Vmenu_accelerator_map = Fmake_keymap (Qnil);
|
|
428
|
753 }
|
