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0
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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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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Not in FSF. */
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23
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24 /* #### There ain't much here because menubars have not been
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25 properly abstracted yet. */
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26
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27 #include <config.h>
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28 #include "lisp.h"
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29
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195
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30 #include "buffer.h"
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0
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31 #include "device.h"
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32 #include "frame.h"
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251
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33 #include "gui.h"
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0
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34 #include "menubar.h"
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35 #include "redisplay.h"
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36 #include "window.h"
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37
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38 int menubar_show_keybindings;
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39 Lisp_Object Vmenubar_configuration;
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40
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41 Lisp_Object Qcurrent_menubar;
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42
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43 Lisp_Object Qactivate_menubar_hook, Vactivate_menubar_hook;
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44
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45 Lisp_Object Vmenubar_visible_p;
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46
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47 static Lisp_Object Vcurrent_menubar; /* DO NOT ever reference this.
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48 Always go through Qcurrent_menubar.
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49 See below. */
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175
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50
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0
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51 Lisp_Object Vblank_menubar;
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52
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53 int popup_menu_titles;
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54
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55 Lisp_Object Vmenubar_pointer_glyph;
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56
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57 static int
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58 menubar_variable_changed (Lisp_Object sym, Lisp_Object *val,
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59 Lisp_Object in_object, int flags)
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60 {
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61 MARK_MENUBAR_CHANGED;
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62 return 0;
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63 }
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64
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65 void
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66 update_frame_menubars (struct frame *f)
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67 {
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68 if (f->menubar_changed || f->windows_changed)
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69 MAYBE_FRAMEMETH (f, update_frame_menubars, (f));
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70
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71 f->menubar_changed = 0;
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72 }
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73
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74 void
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75 free_frame_menubars (struct frame *f)
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76 {
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77 /* If we had directly allocated any memory for the menubars instead
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78 of using all Lisp_Objects this is where we would now free it. */
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79
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80 MAYBE_FRAMEMETH (f, free_frame_menubars, (f));
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81 }
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82
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83 static void
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84 menubar_visible_p_changed (Lisp_Object specifier, struct window *w,
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85 Lisp_Object oldval)
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86 {
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87 MARK_MENUBAR_CHANGED;
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88 }
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89
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90 static void
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91 menubar_visible_p_changed_in_frame (Lisp_Object specifier, struct frame *f,
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92 Lisp_Object oldval)
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93 {
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94 update_frame_menubars (f);
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95 }
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96
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251
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97 Lisp_Object
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98 current_frame_menubar (CONST struct frame* f)
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99 {
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100 struct window *w = XWINDOW (FRAME_LAST_NONMINIBUF_WINDOW (f));
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101 return symbol_value_in_buffer (Qcurrent_menubar, w->buffer);
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102 }
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103
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104 Lisp_Object
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105 menu_parse_submenu_keywords (Lisp_Object desc, struct gui_item* pgui_item)
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106 {
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107 /* Menu descriptor should be a list */
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108 CHECK_CONS (desc);
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272
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109
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251
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110 /* First element may be menu name, although can be omitted.
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111 Let's think that if stuff begins with anything than a keyword
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112 or a list (submenu), this is a menu name, expected to be a stirng */
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113 if (!KEYWORDP (XCAR (desc)) && !CONSP (XCAR (desc)))
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114 {
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115 CHECK_STRING (XCAR (desc));
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116 pgui_item->name = XCAR (desc);
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117 desc = XCDR (desc);
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118 if (!NILP (desc))
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119 CHECK_CONS (desc);
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120 }
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121
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122 /* Walk along all key-value pairs */
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123 while (!NILP(desc) && KEYWORDP (XCAR (desc)))
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124 {
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125 Lisp_Object key, val;
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126 key = XCAR (desc);
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127 desc = XCDR (desc);
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128 CHECK_CONS (desc);
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129 val = XCAR (desc);
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130 desc = XCDR (desc);
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131 if (!NILP (desc))
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132 CHECK_CONS (desc);
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133 gui_item_add_keyval_pair (pgui_item, key, val);
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134 }
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135
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136 /* Return the rest - supposed to be a list of items */
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137 return desc;
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138 }
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139
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140 DEFUN ("menu-find-real-submenu", Fmenu_find_real_submenu, 2, 2, 0, /*
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141 Find a submenu descriptor within DESC by following PATH.
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142 This function finds a submenu descriptor, either from the description
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143 DESC or generated by a filter within DESC. The function regards :config
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144 and :included keywords in the DESC, and expands submenus along the
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145 PATH using :filter functions. Return value is a descriptor for the
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146 submenu, NOT expanded and NOT checked against :config and :included.
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147 Also, individual menu items are not looked for, only submenus.
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148
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272
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149 See also 'find-menu-item'.
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251
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150 */
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151 (desc, path))
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152 {
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153 Lisp_Object path_entry, submenu_desc, submenu;
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154 struct gcpro gcpro1;
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155 struct gui_item gui_item;
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156
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157 gui_item_init (&gui_item);
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269
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158 GCPRO_GUI_ITEM (&gui_item);
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251
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159
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160 EXTERNAL_LIST_LOOP (path_entry, path)
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161 {
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162 /* Verify that DESC describes a menu, not single item */
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163 if (!CONSP (desc))
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164 RETURN_UNGCPRO (Qnil);
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165
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166 /* Parse this menu */
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167 desc = menu_parse_submenu_keywords (desc, &gui_item);
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168
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169 /* Check that this (sub)menu is active */
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170 if (!gui_item_active_p (&gui_item))
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171 RETURN_UNGCPRO (Qnil);
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172
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173 /* Apply :filter */
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174 if (!NILP (gui_item.filter))
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175 desc = call1 (gui_item.filter, desc);
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176
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177 /* Find the next menu on the path inside this one */
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178 EXTERNAL_LIST_LOOP (submenu_desc, desc)
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179 {
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180 submenu = XCAR (submenu_desc);
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181 if (CONSP (submenu)
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182 && STRINGP (XCAR (submenu))
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183 && !NILP (Fstring_equal (XCAR (submenu), XCAR (path_entry))))
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184 {
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185 desc = submenu;
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186 goto descend;
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187 }
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188 }
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189 /* Submenu not found */
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190 RETURN_UNGCPRO (Qnil);
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272
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191
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251
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192 descend:
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193 /* Prepare for the next iteration */
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194 gui_item_init (&gui_item);
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195 }
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196
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197 /* We have successfully descended down the end of the path */
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198 UNGCPRO;
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199 return desc;
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200 }
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201
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20
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202 DEFUN ("popup-menu", Fpopup_menu, 1, 2, 0, /*
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0
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203 Pop up the given menu.
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204 A menu description is a list of menu items, strings, and submenus.
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205
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206 The first element of a menu must be a string, which is the name of the menu.
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207 This is the string that will be displayed in the parent menu, if any. For
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208 toplevel menus, it is ignored. This string is not displayed in the menu
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209 itself.
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210
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211 If an element of a menu is a string, then that string will be presented in
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212 the menu as unselectable text.
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213
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214 If an element of a menu is a string consisting solely of hyphens, then that
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215 item will be presented as a solid horizontal line.
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216
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217 If an element of a menu is a list, it is treated as a submenu. The name of
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218 that submenu (the first element in the list) will be used as the name of the
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219 item representing this menu on the parent.
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220
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221 Otherwise, the element must be a vector, which describes a menu item.
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222 A menu item can have any of the following forms:
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223
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185
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224 [ "name" callback <active-p> ]
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259
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225 [ "name" callback <active-p> <suffix> ]
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185
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226 [ "name" callback :<keyword> <value> :<keyword> <value> ... ]
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227
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228 The name is the string to display on the menu; it is filtered through the
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229 resource database, so it is possible for resources to override what string
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230 is actually displayed.
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231
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232 If the `callback' of a menu item is a symbol, then it must name a command.
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233 It will be invoked with `call-interactively'. If it is a list, then it is
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234 evaluated with `eval'.
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235
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236 The possible keywords are this:
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237
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238 :active <form> Same as <active-p> in the first two forms: the
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239 expression is evaluated just before the menu is
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240 displayed, and the menu will be selectable only if
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241 the result is non-nil.
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242
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259
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243 :suffix <form> Same as <suffix> in the second form: the expression
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244 is evaluated just before the menu is displayed and
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245 resulting string is appended to the displayed name,
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246 providing a convenient way of adding the name of a
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247 command's ``argument'' to the menu, like
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248 ``Kill Buffer NAME''.
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0
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249
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185
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250 :keys "string" Normally, the keyboard equivalents of commands in
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0
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251 menus are displayed when the `callback' is a symbol.
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252 This can be used to specify keys for more complex menu
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253 items. It is passed through `substitute-command-keys'
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254 first.
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255
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256 :style <style> Specifies what kind of object this menu item is:
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257
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258 nil A normal menu item.
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259 toggle A toggle button.
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260 radio A radio button.
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261
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262 The only difference between toggle and radio buttons is
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263 how they are displayed. But for consistency, a toggle
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264 button should be used when there is one option whose
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265 value can be turned on or off, and radio buttons should
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266 be used when there is a set of mutually exclusive
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267 options. When using a group of radio buttons, you
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268 should arrange for no more than one to be marked as
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269 selected at a time.
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270
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271 :selected <form> Meaningful only when STYLE is `toggle' or `radio'.
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272 This specifies whether the button will be in the
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273 selected or unselected state.
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274
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275 For example:
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276
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185
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277 [ "Save As..." write-file t ]
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278 [ "Revert Buffer" revert-buffer (buffer-modified-p) ]
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279 [ "Read Only" toggle-read-only :style toggle :selected buffer-read-only ]
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0
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280
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281 See menubar.el for many more examples.
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20
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282 */
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283 (menu_desc, event))
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0
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284 {
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285 struct frame *f = decode_frame(Qnil);
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286 MAYBE_FRAMEMETH (f, popup_menu, (menu_desc,event));
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287 return Qnil;
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288 }
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289
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195
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290 DEFUN ("normalize-menu-item-name", Fnormalize_menu_item_name, 1, 2, 0, /*
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272
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291 Convert a menu item name string into normal form, and return the new string.
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195
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292 Menu item names should be converted to normal form before being compared.
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293 */
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294 (name, buffer))
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295 {
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296 struct buffer *buf = decode_buffer (buffer, 0);
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297 struct Lisp_String *n;
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298 Charcount end;
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299 int i;
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300 Bufbyte *name_data;
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301 Bufbyte *string_result;
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302 Bufbyte *string_result_ptr;
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303 Emchar elt;
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304 int expecting_underscore = 0;
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197
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305
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195
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306 CHECK_STRING (name);
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197
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307
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195
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308 n = XSTRING (name);
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309 end = string_char_length (n);
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310 name_data = string_data (n);
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197
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311
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195
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312 string_result = (Bufbyte *) alloca (end * MAX_EMCHAR_LEN);
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313 string_result_ptr = string_result;
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219
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314 for (i = 0; i < end; i++)
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195
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315 {
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219
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316 elt = charptr_emchar (name_data);
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195
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317 elt = DOWNCASE (buf, elt);
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219
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318 if (expecting_underscore)
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195
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319 {
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320 expecting_underscore = 0;
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219
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321 switch (elt)
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195
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322 {
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219
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323 case '%':
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324 /* Allow `%%' to mean `%'. */
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325 string_result_ptr += set_charptr_emchar (string_result_ptr, '%');
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326 break;
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327 case '_':
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328 break;
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329 default:
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195
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330 string_result_ptr += set_charptr_emchar (string_result_ptr, '%');
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331 string_result_ptr += set_charptr_emchar (string_result_ptr, elt);
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332 }
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333 }
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219
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334 else if (elt == '%')
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335 expecting_underscore = 1;
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195
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336 else
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337 string_result_ptr += set_charptr_emchar (string_result_ptr, elt);
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219
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338 INC_CHARPTR (name_data);
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195
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339 }
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340
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341 return make_string (string_result, string_result_ptr - string_result);
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342 }
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343
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0
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344 void
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345 syms_of_menubar (void)
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346 {
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347 defsymbol (&Qcurrent_menubar, "current-menubar");
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20
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348 DEFSUBR (Fpopup_menu);
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195
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349 DEFSUBR (Fnormalize_menu_item_name);
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251
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350 DEFSUBR (Fmenu_find_real_submenu);
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0
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351 }
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352
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353 void
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354 vars_of_menubar (void)
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355 {
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356 {
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357 /* put in Vblank_menubar a menubar value which has no visible
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358 * items. This is a bit tricky due to various quirks. We
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359 * could use '(["" nil nil]), but this is apparently equivalent
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360 * to '(nil), and a new frame created with this menubar will
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361 * get a vertically-squished menubar. If we use " " as the
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362 * button title instead of "", we get an etched button border.
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363 * So we use
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364 * '(("No active menubar" ["" nil nil]))
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365 * which creates a menu whose title is "No active menubar",
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366 * and this works fine.
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367 */
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368
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369 Lisp_Object menu_item[3];
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370 static CONST char *blank_msg = "No active menubar";
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371
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372 menu_item[0] = build_string ("");
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373 menu_item[1] = Qnil;
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374 menu_item[2] = Qnil;
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185
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375 Vblank_menubar = Fcons (Fcons (build_string (blank_msg),
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376 Fcons (Fvector (3, &menu_item[0]),
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0
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377 Qnil)),
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378 Qnil);
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379 Vblank_menubar = Fpurecopy (Vblank_menubar);
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380 staticpro (&Vblank_menubar);
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381 }
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382
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383 DEFVAR_BOOL ("popup-menu-titles", &popup_menu_titles /*
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384 If true, popup menus will have title bars at the top.
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385 */ );
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386 popup_menu_titles = 1;
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387
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388 /* #### Replace current menubar with a specifier. */
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389
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390 /* All C code must access the menubar via Qcurrent_menubar
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391 because it can be buffer-local. Note that Vcurrent_menubar
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392 doesn't need to exist at all, except for the magic function. */
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393
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394 DEFVAR_LISP_MAGIC ("current-menubar", &Vcurrent_menubar /*
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395 The current menubar. This may be buffer-local.
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396
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397 When the menubar is changed, the function `set-menubar-dirty-flag' has to
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398 be called for the menubar to be updated on the frame. See `set-menubar'
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399 and `set-buffer-menubar'.
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400
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401 A menubar is a list of menus and menu-items.
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402 A menu is a list of menu items, keyword-value pairs, strings, and submenus.
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403
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404 The first element of a menu must be a string, which is the name of the menu.
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405 This is the string that will be displayed in the parent menu, if any. For
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406 toplevel menus, it is ignored. This string is not displayed in the menu
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407 itself.
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408
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409 Immediately following the name string of the menu, any of three
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410 optional keyword-value pairs is permitted.
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411
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412 If an element of a menu (or menubar) is a string, then that string will be
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413 presented as unselectable text.
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414
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415 If an element of a menu is a string consisting solely of hyphens, then that
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416 item will be presented as a solid horizontal line.
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417
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418 If an element of a menu is a list, it is treated as a submenu. The name of
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419 that submenu (the first element in the list) will be used as the name of the
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420 item representing this menu on the parent.
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421
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422 If an element of a menubar is `nil', then it is used to represent the
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423 division between the set of menubar-items which are flushleft and those
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424 which are flushright.
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425
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426 Otherwise, the element must be a vector, which describes a menu item.
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427 A menu item can have any of the following forms:
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428
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185
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429 [ "name" callback <active-p> ]
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259
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430 [ "name" callback <active-p> <suffix> ]
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185
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431 [ "name" callback :<keyword> <value> :<keyword> <value> ... ]
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0
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432
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433 The name is the string to display on the menu; it is filtered through the
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434 resource database, so it is possible for resources to override what string
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435 is actually displayed.
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436
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437 If the `callback' of a menu item is a symbol, then it must name a command.
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438 It will be invoked with `call-interactively'. If it is a list, then it is
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439 evaluated with `eval'.
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440
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441 The possible keywords are this:
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442
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443 :active <form> Same as <active-p> in the first two forms: the
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444 expression is evaluated just before the menu is
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445 displayed, and the menu will be selectable only if
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446 the result is non-nil.
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447
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259
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448 :suffix <form> Same as <suffix> in the second form: the expression
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449 is evaluated just before the menu is displayed and
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450 resulting string is appended to the displayed name,
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451 providing a convenient way of adding the name of a
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452 command's ``argument'' to the menu, like
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453 ``Kill Buffer NAME''.
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0
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454
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185
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455 :keys "string" Normally, the keyboard equivalents of commands in
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0
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456 menus are displayed when the `callback' is a symbol.
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457 This can be used to specify keys for more complex menu
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458 items. It is passed through `substitute-command-keys'
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459 first.
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460
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461 :style <style> Specifies what kind of object this menu item is:
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462
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463 nil A normal menu item.
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464 toggle A toggle button.
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465 radio A radio button.
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466 button A menubar button.
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467
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468 The only difference between toggle and radio buttons is
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469 how they are displayed. But for consistency, a toggle
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470 button should be used when there is one option whose
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471 value can be turned on or off, and radio buttons should
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472 be used when there is a set of mutually exclusive
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473 options. When using a group of radio buttons, you
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474 should arrange for no more than one to be marked as
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475 selected at a time.
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476
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477 :selected <form> Meaningful only when STYLE is `toggle', `radio' or
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478 `button'. This specifies whether the button will be in
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479 the selected or unselected state.
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480
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481 :included <form> This can be used to control the visibility of a menu or
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482 menu item. The form is evaluated and the menu or menu
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483 item is only displayed if the result is non-nil.
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484
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485 :config <symbol> This is an efficient shorthand for
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486 :included (memq symbol menubar-configuration)
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487 See the variable `menubar-configuration'.
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488
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489 :filter <function> A menu filter can only be used in a menu item list.
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490 (i.e.: not in a menu item itself). It is used to
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491 sensitize or incrementally create a submenu only when
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492 it is selected by the user and not every time the
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493 menubar is activated. The filter function is passed
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494 the list of menu items in the submenu and must return a
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495 list of menu items to be used for the menu. It is
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496 called only when the menu is about to be displayed, so
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497 other menus may already be displayed. Vile and
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498 terrible things will happen if a menu filter function
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499 changes the current buffer, window, or frame. It
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500 also should not raise, lower, or iconify any frames.
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501 Basically, the filter function should have no
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502 side-effects.
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503
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504 For example:
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|
|
505
|
|
185
|
506 ("File"
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|
0
|
507 :filter file-menu-filter ; file-menu-filter is a function that takes
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508 ; one argument (a list of menu items) and
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|
509 ; returns a list of menu items
|
|
185
|
510 [ "Save As..." write-file t ]
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|
|
511 [ "Revert Buffer" revert-buffer (buffer-modified-p) ]
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|
|
512 [ "Read Only" toggle-read-only :style toggle
|
|
0
|
513 :selected buffer-read-only ]
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|
|
514 )
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515
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|
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516 See x-menubar.el for many more examples.
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|
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517
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|
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518 After the menubar is clicked upon, but before any menus are popped up,
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519 the functions on the `activate-menubar-hook' are invoked to make top-level
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520 changes to the menus and menubar. Note, however, that the use of menu
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521 filters (using the :filter keyword) is usually a more efficient way to
|
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|
522 dynamically alter or sensitize menus.
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|
523 */, menubar_variable_changed);
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|
|
524
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|
|
525 Vcurrent_menubar = Qnil;
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526
|
|
|
527 DEFVAR_LISP ("activate-menubar-hook", &Vactivate_menubar_hook /*
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|
|
528 Function or functions called before a menubar menu is pulled down.
|
|
|
529 These functions are called with no arguments, and should interrogate and
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|
|
530 modify the value of `current-menubar' as desired.
|
|
|
531
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|
532 The functions on this hook are invoked after the mouse goes down, but before
|
|
|
533 the menu is mapped, and may be used to activate, deactivate, add, or delete
|
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|
534 items from the menus. However, it is probably the case that using a :filter
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|
|
535 keyword in a submenu would be a more efficient way of updating menus. See
|
|
|
536 the documentation of `current-menubar'.
|
|
|
537
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|
|
538 These functions may return the symbol `t' to assert that they have made
|
|
|
539 no changes to the menubar. If any other value is returned, the menubar is
|
|
|
540 recomputed. If `t' is returned but the menubar has been changed, then the
|
|
|
541 changes may not show up right away. Returning `nil' when the menubar has
|
|
|
542 not changed is not so bad; more computation will be done, but redisplay of
|
|
|
543 the menubar will still be performed optimally.
|
|
|
544 */ );
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|
|
545 Vactivate_menubar_hook = Qnil;
|
|
|
546 defsymbol (&Qactivate_menubar_hook, "activate-menubar-hook");
|
|
|
547
|
|
|
548 DEFVAR_BOOL ("menubar-show-keybindings", &menubar_show_keybindings /*
|
|
|
549 If true, the menubar will display keyboard equivalents.
|
|
|
550 If false, only the command names will be displayed.
|
|
|
551 */ );
|
|
|
552 menubar_show_keybindings = 1;
|
|
|
553
|
|
|
554 DEFVAR_LISP_MAGIC ("menubar-configuration", &Vmenubar_configuration /*
|
|
|
555 A list of symbols, against which the value of the :config tag for each
|
|
|
556 menubar item will be compared. If a menubar item has a :config tag, then
|
|
|
557 it is omitted from the menubar if that tag is not a member of the
|
|
|
558 `menubar-configuration' list.
|
|
|
559 */ , menubar_variable_changed);
|
|
|
560 Vmenubar_configuration = Qnil;
|
|
|
561
|
|
|
562 DEFVAR_LISP ("menubar-pointer-glyph", &Vmenubar_pointer_glyph /*
|
|
|
563 *The shape of the mouse-pointer when over the menubar.
|
|
|
564 This is a glyph; use `set-glyph-image' to change it.
|
|
|
565 If unspecified in a particular domain, the window-system-provided
|
|
|
566 default pointer is used.
|
|
|
567 */ );
|
|
|
568
|
|
|
569 Fprovide (intern ("menubar"));
|
|
|
570 }
|
|
|
571
|
|
|
572 void
|
|
|
573 specifier_vars_of_menubar (void)
|
|
|
574 {
|
|
|
575 DEFVAR_SPECIFIER ("menubar-visible-p", &Vmenubar_visible_p /*
|
|
|
576 *Whether the menubar is visible.
|
|
|
577 This is a specifier; use `set-specifier' to change it.
|
|
|
578 */ );
|
|
|
579 Vmenubar_visible_p = Fmake_specifier (Qboolean);
|
|
|
580
|
|
|
581 set_specifier_fallback (Vmenubar_visible_p, list1 (Fcons (Qnil, Qt)));
|
|
|
582 set_specifier_caching (Vmenubar_visible_p,
|
|
|
583 slot_offset (struct window,
|
|
|
584 menubar_visible_p),
|
|
|
585 menubar_visible_p_changed,
|
|
|
586 slot_offset (struct frame,
|
|
|
587 menubar_visible_p),
|
|
|
588 menubar_visible_p_changed_in_frame);
|
|
|
589 }
|
|
|
590
|
|
|
591 void
|
|
|
592 complex_vars_of_menubar (void)
|
|
|
593 {
|
|
|
594 Vmenubar_pointer_glyph = Fmake_glyph_internal (Qpointer);
|
|
|
595 }
|
