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209
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1 ;;; menubar.el --- Menubar support for XEmacs
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2
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3 ;; Copyright (C) 1991-4, 1997 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995 Tinker Systems and INS Engineering Corp.
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5 ;; Copyright (C) 1995, 1996 Ben Wing.
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6
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7 ;; Maintainer: XEmacs Development Team
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8 ;; Keywords: internal, extensions, dumped
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9
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10 ;; This file is part of XEmacs.
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11
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12 ;; XEmacs is free software; you can redistribute it and/or modify it
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13 ;; under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; XEmacs is distributed in the hope that it will be useful, but
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18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 ;; General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with XEmacs; see the file COPYING. If not, write to the
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24 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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25 ;; Boston, MA 02111-1307, USA.
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26
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27 ;;; Synched up with: Not in FSF. (Completely divergent from FSF menu-bar.el)
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28
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29 ;;; Commentary:
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30
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31 ;; This file is dumped with XEmacs (when menubar support is compiled in).
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32
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33 ;; Some stuff in FSF menu-bar.el is in x-menubar.el
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34
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35 ;;; Code:
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36
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37 (defvar default-menubar nil)
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38
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39 ;; this function is considered "part of the lexicon" by many,
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40 ;; so we'll leave it here.
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41 (defun kill-this-buffer () ; for the menubar
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42 "Kill the current buffer."
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43 (interactive)
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44 (kill-buffer (current-buffer)))
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45
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46 (defun set-menubar-dirty-flag ()
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47 "Tell XEmacs that the menubar has to be updated.
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48 NOTE: XEmacs now recognizes when you set a different value for
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49 `current-menubar'. You *only* need to call this function if you
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50 destructively modify a part of the menubar and don't set `current-menubar'.
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51 Note that all the functions that modify a menu call this automatically."
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52 (setq-default current-menubar (default-value 'current-menubar)))
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53
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54 ;; #### shouldn't this perhaps be `copy-tree'?
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55 (defun set-menubar (menubar)
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56 "Set the default menubar to be MENUBAR.
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57 See `current-menubar' for a description of the syntax of a menubar."
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58 (check-menu-syntax menubar t)
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59 (setq-default current-menubar (copy-sequence menubar)))
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60
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61 (defun set-buffer-menubar (menubar)
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62 "Set the buffer-local menubar to be MENUBAR.
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63 See `current-menubar' for a description of the syntax of a menubar."
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64 (check-menu-syntax menubar t)
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65 (make-local-variable 'current-menubar)
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66 (setq current-menubar (copy-sequence menubar)))
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67
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68 (defun check-menu-syntax (menu &optional menubar-p)
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69 ;; The C code does syntax checking on the value of `current-menubar',
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70 ;; but it's better to do it early, before things have gotten messed up.
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71 (if menubar-p
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72 nil
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73 (or (stringp (car menu))
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74 (signal 'error
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75 (list "menu name (first element) must be a string" menu)))
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76 ;;(or (cdr menu) (signal 'error (list "menu is empty" menu)))
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77 (setq menu (cdr menu)))
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78 (let (menuitem item)
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79 (while (keywordp (setq item (car menu)))
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80 (or (memq item '(:config :included :filter :accelerator))
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81 (signal 'error
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82 (list "menu keyword must be :config, :included, :accelerator or :filter"
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83 item)))
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84 (if (or (not (cdr menu))
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85 (vectorp (nth 1 menu))
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86 (keywordp (nth 1 menu)))
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87 (signal 'error (list "strange keyword value" item (nth 1 menu))))
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88 (setq menu (nthcdr 2 menu)))
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89 (while menu
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90 (setq menuitem (car menu))
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91 (cond
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92 ((stringp menuitem)
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93 (and (string-match "^\\(-+\\|=+\\):\\(.*\\)" menuitem)
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94 (setq item (match-string 2 menuitem))
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95 (or (member item '(;; Motif-compatible
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96 "singleLine"
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97 "doubleLine"
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98 "singleDashedLine"
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99 "doubleDashedLine"
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100 "noLine"
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101 "shadowEtchedIn"
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102 "shadowEtchedOut"
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103 "shadowEtchedInDash"
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104 "shadowEtchedOutDash"
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105 ;; non-Motif (Lucid menubar widget only)
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106 "shadowDoubleEtchedIn"
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107 "shadowDoubleEtchedOut"
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108 "shadowDoubleEtchedInDash"
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109 "shadowDoubleEtchedOutDash"
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110 ))
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111 (signal 'error (list "bogus separator style in menu item" item)))
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112 ))
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113 ((null menuitem)
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114 (or menubar-p
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115 (signal 'error (list "nil is only permitted in the top level of menubars"))))
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116 ((consp menuitem)
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117 (check-menu-syntax menuitem))
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118 ((vectorp menuitem)
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119 (let ((L (length menuitem))
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120 plistp)
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121 (and (< L 3)
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122 (signal 'error
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123 (list "button descriptors must be at least 3 long"
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124 menuitem)))
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125 (setq plistp (or (>= L 5) (keywordp (aref menuitem 2))))
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126 (or (stringp (aref menuitem 0))
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127 (signal 'error
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128 (list
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129 "first element of a button must be a string (the label)"
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130 menuitem)))
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131 (or plistp
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132 (< L 4)
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133 (null (aref menuitem 3))
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134 (stringp (aref menuitem 3))
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135 (signal 'error
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136 (list
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137 "fourth element of a button must be a string (the label suffix)"
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138 menuitem)))
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139 (if plistp
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140 (let ((i 2)
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141 selp
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142 style
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143 item)
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144 (while (< i L)
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145 (setq item (aref menuitem i))
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146 (cond ((not (memq item '(:active :suffix :keys :style
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147 :full :included :selected
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148 :accelerator)))
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149 (signal 'error
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150 (list (if (keywordp item)
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151 "unknown menu item keyword"
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152 "not a keyword")
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153 item menuitem)))
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154 ((eq item :style)
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155 (setq style (aref menuitem (1+ i)))
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156 (or (memq style '(nil toggle radio button text))
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157 (signal 'error (list "unknown style" style
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158 menuitem))))
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159 ((eq item :selected) (setq selp t))
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160 )
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161 (setq i (+ i (if (eq item :full) 1 2))))
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162 (if (and selp (not (memq style '(toggle button radio))))
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163 (signal 'error
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164 (list
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165 ":selected only makes sense with :style toggle, radio, or button"
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166 menuitem)))
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167 )))
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168 )
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169 (t (signal 'error (list "unrecognised menu descriptor" menuitem))))
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170 (setq menu (cdr menu)))))
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171
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172
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173 ;;; menu manipulation functions
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174
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175 (defun find-menu-item (menubar item-path-list &optional parent)
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176 "Search MENUBAR for item given by ITEM-PATH-LIST starting from PARENT.
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177 Returns (ITEM . PARENT), where PARENT is the immediate parent of
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178 the item found.
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179 If the item does not exist, the car of the returned value is nil.
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180 If some menu in the ITEM-PATH-LIST does not exist, an error is signalled."
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225
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181 (check-argument-type 'listp item-path-list)
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182 (unless parent
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183 (setq item-path-list (mapcar 'normalize-menu-item-name item-path-list)))
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209
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184 (if (not (consp menubar))
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185 nil
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186 (let ((rest menubar)
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187 result)
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225
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188 (when (stringp (car rest))
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189 (setq rest (cdr rest)))
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209
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190 (while (keywordp (car rest))
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191 (setq rest (cddr rest)))
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192 (while rest
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193 (if (and (car rest)
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194 (equal (car item-path-list)
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225
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195 (normalize-menu-item-name
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196 (cond ((vectorp (car rest))
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197 (aref (car rest) 0))
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198 ((stringp (car rest))
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199 (car rest))
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200 (t
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201 (caar rest))))))
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202 (setq result (car rest)
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203 rest nil)
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209
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204 (setq rest (cdr rest))))
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205 (if (cdr item-path-list)
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225
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206 (cond ((consp result)
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207 (find-menu-item (cdr result) (cdr item-path-list) result))
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208 (result
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209 (signal 'error (list (gettext "not a submenu") result)))
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210 (t
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211 (signal 'error (list (gettext "no such submenu")
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212 (car item-path-list)))))
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209
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213 (cons result parent)))))
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214
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215 (defun add-menu-item-1 (leaf-p menu-path new-item before)
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216 ;; This code looks like it could be cleaned up some more
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217 ;; Do we really need 6 calls to find-menu-item?
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218 (when before (setq before (normalize-menu-item-name before)))
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219 (let* ((item-name
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220 (cond ((vectorp new-item) (aref new-item 0))
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221 ((consp new-item) (car new-item))
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222 (t nil)))
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223 (menubar current-menubar)
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224 (menu (condition-case ()
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225 (car (find-menu-item menubar menu-path))
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226 (error nil)))
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227 (item-found (cond
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228 ((null item-name)
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229 nil)
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230 ((not (listp menu))
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231 (signal 'error (list (gettext "not a submenu")
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232 menu-path)))
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233 (menu
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234 (find-menu-item (cdr menu) (list item-name)))
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235 (t
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236 (find-menu-item menubar (list item-name)))
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237 )))
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238 (unless menubar
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239 (error "`current-menubar' is nil: can't add menus to it."))
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240 (unless menu
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241 (let ((rest menu-path)
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242 (so-far menubar))
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243 (while rest
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244 ;;; (setq menu (car (find-menu-item (cdr so-far) (list (car rest)))))
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245 (setq menu
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246 (if (eq so-far menubar)
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247 (car (find-menu-item so-far (list (car rest))))
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248 (car (find-menu-item (cdr so-far) (list (car rest))))))
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249 (unless menu
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250 (let ((rest2 so-far))
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251 (while (and (cdr rest2) (car (cdr rest2)))
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252 (setq rest2 (cdr rest2)))
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253 (setcdr rest2
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254 (nconc (list (setq menu (list (car rest))))
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255 (cdr rest2)))))
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256 (setq so-far menu)
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257 (setq rest (cdr rest)))))
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258 (if (and item-found (car item-found))
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259 ;; hack the item in place.
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260 (if menu
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261 ;; Isn't it very bad form to use nsubstitute for side effects?
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262 (nsubstitute new-item (car item-found) menu)
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263 (setq current-menubar (nsubstitute new-item
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264 (car item-found)
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265 current-menubar)))
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266 ;; OK, we have to add the whole thing...
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267 ;; if BEFORE is specified, try to add it there.
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268 (unless menu (setq menu current-menubar))
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269 (when before
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270 (setq before (car (find-menu-item menu (list before)))))
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271 (let ((rest menu)
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272 (added-before nil))
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273 (while rest
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274 (if (eq before (car (cdr rest)))
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275 (progn
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276 (setcdr rest (cons new-item (cdr rest)))
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277 (setq rest nil added-before t))
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278 (setq rest (cdr rest))))
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279 (when (not added-before)
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280 ;; adding before the first item on the menubar itself is harder
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281 (if (and (eq menu menubar) (eq before (car menu)))
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282 (setq menu (cons new-item menu)
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283 current-menubar menu)
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284 ;; otherwise, add the item to the end.
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285 (nconc menu (list new-item))))))
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286 (set-menubar-dirty-flag)
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287 new-item))
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288
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289 (defun add-menu-button (menu-path menu-leaf &optional before)
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290 "Add a menu item to some menu, creating the menu first if necessary.
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291 If the named item exists already, it is changed.
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292 MENU-PATH identifies the menu under which the new menu item should be inserted.
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293 It is a list of strings; for example, (\"File\") names the top-level \"File\"
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294 menu. (\"File\" \"Foo\") names a hypothetical submenu of \"File\".
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295 MENU-LEAF is a menubar leaf node. See the documentation of `current-menubar'.
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296 BEFORE, if provided, is the name of a menu item before which this item should
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297 be added, if this item is not on the menu already. If the item is already
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298 present, it will not be moved."
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299 (add-menu-item-1 t menu-path menu-leaf before))
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300
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301 ;; I actually liked the old name better, but the interface has changed too
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302 ;; drastically to keep it. --Stig
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303 (defun add-submenu (menu-path submenu &optional before)
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304 "Add a menu to the menubar or one of its submenus.
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305 If the named menu exists already, it is changed.
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306 MENU-PATH identifies the menu under which the new menu should be inserted.
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307 It is a list of strings; for example, (\"File\") names the top-level \"File\"
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308 menu. (\"File\" \"Foo\") names a hypothetical submenu of \"File\".
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309 If MENU-PATH is nil, then the menu will be added to the menubar itself.
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310 SUBMENU is the new menu to add.
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311 See the documentation of `current-menubar' for the syntax.
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312 BEFORE, if provided, is the name of a menu before which this menu should
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313 be added, if this menu is not on its parent already. If the menu is already
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314 present, it will not be moved."
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315 (check-menu-syntax submenu nil)
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316 (add-menu-item-1 nil menu-path submenu before))
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317
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318 (defun purecopy-menubar (x)
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319 ;; this calls purecopy on the strings, and the contents of the vectors,
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320 ;; but not on the vectors themselves, or the conses - those must be
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321 ;; writable.
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322 (cond ((vectorp x)
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323 (let ((i (length x)))
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324 (while (> i 0)
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325 (aset x (1- i) (purecopy (aref x (1- i))))
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326 (setq i (1- i))))
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327 x)
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328 ((consp x)
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329 (let ((rest x))
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330 (while rest
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331 (setcar rest (purecopy-menubar (car rest)))
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332 (setq rest (cdr rest))))
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333 x)
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334 (t
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335 (purecopy x))))
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336
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337 (defun delete-menu-item (path)
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338 "Remove the named menu item from the menu hierarchy.
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339 PATH is a list of strings which identify the position of the menu item in
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340 the menu hierarchy. The documentation of `add-submenu' describes menu-paths."
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341 (let* ((pair (condition-case nil (find-menu-item current-menubar path)
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342 (error nil)))
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343 (item (car pair))
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344 (parent (or (cdr pair) current-menubar)))
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345 (if (not item)
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346 nil
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347 ;; the menubar is the only special case, because other menus begin
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348 ;; with their name.
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349 (if (eq parent current-menubar)
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350 (setq current-menubar (delq item parent))
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351 (delq item parent))
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352 (set-menubar-dirty-flag)
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353 item)))
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354
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355 (defun relabel-menu-item (path new-name)
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356 "Change the string of the specified menu item.
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357 PATH is a list of strings which identify the position of the menu item in
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358 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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359 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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360 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\".
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361 NEW-NAME is the string that the menu item will be printed as from now on."
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362 (or (stringp new-name)
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363 (setq new-name (signal 'wrong-type-argument (list 'stringp new-name))))
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364 (let* ((menubar current-menubar)
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365 (pair (find-menu-item menubar path))
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366 (item (car pair))
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367 (menu (cdr pair)))
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368 (or item
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369 (signal 'error (list (if menu (gettext "No such menu item")
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370 (gettext "No such menu"))
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371 path)))
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372 (if (and (consp item)
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373 (stringp (car item)))
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374 (setcar item new-name)
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375 (aset item 0 new-name))
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376 (set-menubar-dirty-flag)
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377 item))
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378
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379 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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380 ;;
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381 ;; these are all bad style. Why in the world would we put evaluable forms
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382 ;; into the menubar if we didn't want people to use 'em?
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383 ;; x-font-menu.el is the only known offender right now and that ought to be
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384 ;; rehashed a bit.
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385 ;;
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386
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387 (defun enable-menu-item-1 (path toggle-p on-p)
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388 (let (menu item)
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389 (if (and (vectorp path) (> (length path) 2)) ; limited syntax checking...
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390 (setq item path)
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391 (let* ((menubar current-menubar)
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392 (pair (find-menu-item menubar path)))
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393 (setq item (car pair)
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394 menu (cdr pair))
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395 (or item
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396 (signal 'error (list (if menu
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397 "No such menu item"
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398 "No such menu")
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399 path)))
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400 (if (consp item)
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401 (error "%S is a menu, not a menu item" path))))
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402 (if (or (> (length item) 4)
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403 (and (symbolp (aref item 2))
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404 (= ?: (aref (symbol-name (aref item 2)) 0))))
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405 ;; plist-like syntax
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406 (let ((i 2)
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407 (keyword (if toggle-p :selected :active))
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408 (ok nil))
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409 (while (< i (length item))
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410 (cond ((eq (aref item i) keyword)
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411 (aset item (1+ i) on-p)
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412 (setq ok t)))
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413 (setq i (+ i 2)))
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414 (cond (ok nil)
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415 (toggle-p
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416 (signal 'error (list "not a toggle menu item" item)))
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417 (t
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418 ;; Need to copy the item to extend it, sigh...
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419 (let ((cons (memq item menu))
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420 (new-item (vconcat item (list keyword on-p))))
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421 (if cons
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422 (setcar cons (setq item new-item))
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423 (if menu
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424 (error "couldn't find %S on its parent?" item)
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425 (error "no %S slot to set: %S" keyword item)))))))
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426 ;; positional syntax
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427 (if toggle-p
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428 (signal 'error (list "not a toggle menu item" item))
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429 (aset item 2 on-p)))
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430 (set-menubar-dirty-flag)
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431 item))
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432
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433 (defun enable-menu-item (path)
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434 "Make the named menu item be selectable.
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435 PATH is a list of strings which identify the position of the menu item in
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436 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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437 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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438 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\"."
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439 (enable-menu-item-1 path nil t))
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440
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441 (defun disable-menu-item (path)
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442 "Make the named menu item be unselectable.
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443 PATH is a list of strings which identify the position of the menu item in
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444 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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445 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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446 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\"."
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447 (enable-menu-item-1 path nil nil))
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448
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449 (defun select-toggle-menu-item (path)
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450 "Make the named toggle- or radio-style menu item be in the `selected' state.
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451 PATH is a list of strings which identify the position of the menu item in
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452 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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453 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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454 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\"."
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455 (enable-menu-item-1 path t t))
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456
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457 (defun deselect-toggle-menu-item (path)
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458 "Make the named toggle- or radio-style menu item be in the `unselected' state.
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459 PATH is a list of strings which identify the position of the menu item in
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460 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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461 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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462 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\"."
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463 (enable-menu-item-1 path t nil))
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464
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465
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466 (defun get-popup-menu-response (menu-desc &optional event)
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467 "Pop up the given menu and wait for a response.
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468 This blocks until the response is received, and returns the misc-user
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469 event that encapsulates the response. To execute it, you can do
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470 (funcall (event-function response) (event-object response))
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471 If no response was received, nil is returned.
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472
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473 MENU-DESC and EVENT are as in the call to `popup-menu'."
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474 ;; partially stolen from w3
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475 (let ((echo-keystrokes 0)
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476 new-event)
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477 (popup-menu menu-desc event)
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478 (catch 'popup-done
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479 (while t
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480 (setq new-event (next-command-event new-event))
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481 (cond ((misc-user-event-p new-event)
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482 (throw 'popup-done new-event))
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483 ((not (popup-up-p))
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484 (setq unread-command-events (cons new-event
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485 unread-command-events))
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486 (throw 'popup-done nil))
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487 ((button-release-event-p new-event);; don't beep twice
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488 nil)
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489 ((event-matches-key-specifier-p (quit-char))
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490 (signal 'quit nil))
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491 (t
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492 (beep)
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493 (message "please make a choice from the menu.")))))))
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494
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495 (defun popup-menu-and-execute-in-window (menu-desc event)
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496 "Pop up the given menu and execute its response in EVENT's window.
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497 This blocks until the response is received, temporarily selects
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498 EVENT's window, and executes the command specified in the response.
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499 EVENT can also be a window. See `popup-menu' for the semantics of
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500 MENU-DESC."
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501 (let ((response
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502 (get-popup-menu-response menu-desc
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503 (and (eventp event) event))))
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504 (and (misc-user-event-p response)
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505 (save-selected-window
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506 (select-window (if (windowp event) event
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507 (event-window event)))
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508 (funcall (event-function response)
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509 (event-object response))))))
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510
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511 ;; provide default bindings for menu accelerator map
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512 (and (boundp 'menu-accelerator-map)
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513 (keymapp menu-accelerator-map)
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514 (progn
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515 (define-key menu-accelerator-map "\e" 'menu-escape)
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516 (define-key menu-accelerator-map [left] 'menu-left)
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517 (define-key menu-accelerator-map [right] 'menu-right)
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518 (define-key menu-accelerator-map [up] 'menu-up)
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519 (define-key menu-accelerator-map [down] 'menu-down)
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520 (define-key menu-accelerator-map [return] 'menu-select)
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521 (define-key menu-accelerator-map [kp_down] 'menu-down)
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522 (define-key menu-accelerator-map [kp_up] 'menu-down)
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523 (define-key menu-accelerator-map [kp_left] 'menu-left)
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524 (define-key menu-accelerator-map [kp_right] 'menu-right)
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525 (define-key menu-accelerator-map [kp_enter] 'menu-select)
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526 (define-key menu-accelerator-map "\C-g" 'menu-quit)))
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527
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528
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529 (provide 'menubar)
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530
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531 ;;; menubar.el ends here
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