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1 ;; Menubar support.
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2 ;; Copyright (C) 1991, 1992, 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 ;; Copyright (C) 1995, 1996 Ben Wing.
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5
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6 ;; This file is part of XEmacs.
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7
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8 ;; XEmacs is free software; you can redistribute it and/or modify it
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9 ;; under the terms of the GNU General Public License as published by
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10 ;; the Free Software Foundation; either version 2, or (at your option)
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11 ;; any later version.
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12
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13 ;; XEmacs is distributed in the hope that it will be useful, but
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14 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 ;; General Public License for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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16
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19 ;; along with XEmacs; see the file COPYING. If not, write to the
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70
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20 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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21 ;; Boston, MA 02111-1307, USA.
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22
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23 ;;; Synched up with: Not in FSF. (Completely divergent from FSF menu-bar.el)
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24 ;;; Some stuff in FSF menu-bar.el is in x-menubar.el
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25
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26 (defvar default-menubar nil)
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27
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28 ;; this function is considered "part of the lexicon" by many,
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29 ;; so we'll leave it here.
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30 (defun kill-this-buffer () ; for the menubar
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31 "Kill the current buffer."
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32 (interactive)
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33 (kill-buffer (current-buffer)))
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34
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35 (defun set-menubar-dirty-flag ()
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36 "Tell XEmacs that the menubar has to be updated.
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37 NOTE: XEmacs now recognizes when you set a different value for
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38 `current-menubar'. You *only* need to call this function if you
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39 destructively modify a part of the menubar and don't set `current-menubar'.
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40 Note that all the functions that modify a menu call this automatically."
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41 (setq-default current-menubar (default-value 'current-menubar)))
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42
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43 ;; #### shouldn't this perhaps be `copy-tree'?
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44 (defun set-menubar (menubar)
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45 "Set the default menubar to be MENUBAR.
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46 See `current-menubar' for a description of the syntax of a menubar."
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47 (check-menu-syntax menubar t)
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48 (setq-default current-menubar (copy-sequence menubar)))
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49
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50 (defun set-buffer-menubar (menubar)
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51 "Set the buffer-local menubar to be MENUBAR.
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52 See `current-menubar' for a description of the syntax of a menubar."
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53 (check-menu-syntax menubar t)
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54 (make-local-variable 'current-menubar)
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55 (setq current-menubar (copy-sequence menubar)))
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56
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57 (defun check-menu-syntax (menu &optional menubar-p)
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58 ;; The C code does syntax checking on the value of `current-menubar',
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59 ;; but it's better to do it early, before things have gotten messed up.
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60 (if menubar-p
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61 nil
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62 (or (stringp (car menu))
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63 (signal 'error
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64 (list "menu name (first element) must be a string" menu)))
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65 ;;(or (cdr menu) (signal 'error (list "menu is empty" menu)))
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66 (setq menu (cdr menu)))
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67 (let (menuitem item)
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68 (while (keywordp (setq item (car menu)))
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69 (or (memq item '(:config :included :filter))
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70 (signal 'error
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71 (list "menu keyword must be :config, :included, or :filter"
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72 item)))
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73 (if (or (not (cdr menu))
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74 (vectorp (nth 1 menu))
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75 (keywordp (nth 1 menu)))
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76 (signal 'error (list "strange keyword value" item (nth 1 menu))))
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77 (setq menu (nthcdr 2 menu)))
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78 (while menu
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79 (setq menuitem (car menu))
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80 (cond
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81 ((stringp menuitem)
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82 (and (string-match "^\\(-+\\|=+\\):\\(.*\\)" menuitem)
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83 (setq item (match-string 2 menuitem))
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84 (or (member item '(;; Motif-compatible
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85 "singleLine"
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86 "doubleLine"
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87 "singleDashedLine"
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88 "doubleDashedLine"
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89 "noLine"
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90 "shadowEtchedIn"
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91 "shadowEtchedOut"
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92 "shadowEtchedInDash"
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93 "shadowEtchedOutDash"
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94 ;; non-Motif (Lucid menubar widget only)
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95 "shadowDoubleEtchedIn"
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96 "shadowDoubleEtchedOut"
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97 "shadowDoubleEtchedInDash"
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98 "shadowDoubleEtchedOutDash"
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99 ))
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100 (signal 'error (list "bogus separator style in menu item" item)))
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101 ))
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102 ((null menuitem)
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103 (or menubar-p
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104 (signal 'error (list "nil is only permitted in the top level of menubars"))))
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105 ((consp menuitem)
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106 (check-menu-syntax menuitem))
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107 ((vectorp menuitem)
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108 (let ((L (length menuitem))
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109 plistp)
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110 (and (< L 3)
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111 (signal 'error
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112 (list "button descriptors must be at least 3 long"
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113 menuitem)))
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114 (setq plistp (or (>= L 5) (keywordp (aref menuitem 2))))
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115 (or (stringp (aref menuitem 0))
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116 (signal 'error
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117 (list
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118 "first element of a button must be a string (the label)"
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119 menuitem)))
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120 (or plistp
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121 (< L 4)
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122 (null (aref menuitem 3))
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123 (stringp (aref menuitem 3))
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124 (signal 'error
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125 (list
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126 "fourth element of a button must be a string (the label suffix)"
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127 menuitem)))
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128 (if plistp
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129 (let ((i 2)
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130 selp
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131 style
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132 item)
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133 (while (< i L)
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134 (setq item (aref menuitem i))
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135 (cond ((not (memq item '(:active :suffix :keys :style
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136 :full :included :selected)))
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137 (signal 'error
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138 (list (if (keywordp item)
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139 "unknown menu item keyword"
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140 "not a keyword")
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141 item menuitem)))
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142 ((eq item :style)
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143 (setq style (aref menuitem (1+ i)))
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144 (or (memq style '(nil toggle radio button text))
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145 (signal 'error (list "unknown style" style
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146 menuitem))))
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147 ((eq item :selected) (setq selp t))
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148 )
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149 (setq i (+ i (if (eq item :full) 1 2))))
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150 (if (and selp (not (memq style '(toggle button radio))))
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151 (signal 'error
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152 (list
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153 ":selected only makes sense with :style toggle, radio, or button"
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154 menuitem)))
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155 )))
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156 )
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157 (t (signal 'error (list "unrecognised menu descriptor" menuitem))))
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158 (setq menu (cdr menu)))))
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159
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160
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161 ;;; menu manipulation functions
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162
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163 (defun find-menu-item (menubar item-path-list &optional parent)
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164 "Search MENUBAR for item given by ITEM-PATH-LIST starting from PARENT.
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165 Returns (ITEM . PARENT), where PARENT is the immediate parent of
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166 the item found.
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167 If the item does not exist, the car of the returned value is nil.
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168 If some menu in the ITEM-PATH-LIST does not exist, an error is signalled."
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169 (or (listp item-path-list)
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170 (signal 'wrong-type-argument (list 'listp item-path-list)))
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171 (or parent (setq item-path-list (mapcar 'downcase item-path-list)))
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172 (if (not (consp menubar))
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173 nil
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174 (let ((rest menubar)
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175 result)
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176 (if (stringp (car rest))
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177 (setq rest (cdr rest)))
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178 (while (keywordp (car rest))
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179 (setq rest (cddr rest)))
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180 (while rest
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181 (if (and (car rest)
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182 (equal (car item-path-list)
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183 (downcase (if (vectorp (car rest))
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184 (aref (car rest) 0)
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185 (if (stringp (car rest))
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186 (car rest)
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187 (car (car rest)))))))
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188 (setq result (car rest) rest nil)
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189 (setq rest (cdr rest))))
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190 (if (cdr item-path-list)
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191 (if (consp result)
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192 (find-menu-item (cdr result) (cdr item-path-list) result)
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193 (if result
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194 (signal 'error (list (gettext "not a submenu") result))
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195 (signal 'error (list (gettext "no such submenu") (car item-path-list)))))
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196 (cons result parent)))))
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197
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198 (defun add-menu-item-1 (leaf-p menu-path new-item before)
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70
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199 ;; This code looks like it could be cleaned up some more
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200 ;; Do we really need 6 calls to find-menu-item?
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201 (when before (setq before (downcase before)))
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202 (let* ((item-name
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203 (cond ((vectorp new-item) (aref new-item 0))
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204 ((consp new-item) (car new-item))
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205 (t nil)))
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206 (menubar current-menubar)
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207 (menu (condition-case ()
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208 (car (find-menu-item menubar menu-path))
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209 (error nil)))
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70
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210 (item-found (cond
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211 ((null item-name)
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212 nil)
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213 ((not (listp menu))
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214 (signal 'error (list (gettext "not a submenu")
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215 menu-path)))
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216 (menu
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217 (find-menu-item (cdr menu) (list item-name)))
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218 (t
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219 (find-menu-item menubar (list item-name)))
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220 )))
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221 (unless menubar
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222 (error "`current-menubar' is nil: can't add menus to it."))
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223 (unless menu
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224 (let ((rest menu-path)
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225 (so-far menubar))
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226 (while rest
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227 ;;; (setq menu (car (find-menu-item (cdr so-far) (list (car rest)))))
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228 (setq menu
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229 (if (eq so-far menubar)
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230 (car (find-menu-item so-far (list (car rest))))
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231 (car (find-menu-item (cdr so-far) (list (car rest))))))
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232 (unless menu
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233 (let ((rest2 so-far))
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234 (while (and (cdr rest2) (car (cdr rest2)))
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235 (setq rest2 (cdr rest2)))
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236 (setcdr rest2
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237 (nconc (list (setq menu (list (car rest))))
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238 (cdr rest2)))))
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239 (setq so-far menu)
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240 (setq rest (cdr rest)))))
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0
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241 (if (and item-found (car item-found))
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242 ;; hack the item in place.
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243 (if menu
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70
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244 ;; Isn't it very bad form to use nsubstitute for side effects?
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245 (nsubstitute new-item (car item-found) menu)
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246 (setq current-menubar (nsubstitute new-item
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247 (car item-found)
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248 current-menubar)))
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249 ;; OK, we have to add the whole thing...
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250 ;; if BEFORE is specified, try to add it there.
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70
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251 (unless menu (setq menu current-menubar))
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252 (when before
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253 (setq before (car (find-menu-item menu (list before)))))
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254 (let ((rest menu)
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255 (added-before nil))
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256 (while rest
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257 (if (eq before (car (cdr rest)))
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258 (progn
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259 (setcdr rest (cons new-item (cdr rest)))
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260 (setq rest nil added-before t))
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261 (setq rest (cdr rest))))
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70
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262 (when (not added-before)
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263 ;; adding before the first item on the menubar itself is harder
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264 (if (and (eq menu menubar) (eq before (car menu)))
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265 (setq menu (cons new-item menu)
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266 current-menubar menu)
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267 ;; otherwise, add the item to the end.
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268 (nconc menu (list new-item))))))
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0
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269 (set-menubar-dirty-flag)
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270 new-item))
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271
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272 (defun add-menu-button (menu-path menu-leaf &optional before)
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273 "Add a menu item to some menu, creating the menu first if necessary.
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274 If the named item exists already, it is changed.
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275 MENU-PATH identifies the menu under which the new menu item should be inserted.
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276 It is a list of strings; for example, (\"File\") names the top-level \"File\"
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277 menu. (\"File\" \"Foo\") names a hypothetical submenu of \"File\".
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278 MENU-LEAF is a menubar leaf node. See the documentation of `current-menubar'.
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279 BEFORE, if provided, is the name of a menu item before which this item should
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280 be added, if this item is not on the menu already. If the item is already
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281 present, it will not be moved."
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282 (add-menu-item-1 t menu-path menu-leaf before))
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283
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284 ;; I actually liked the old name better, but the interface has changed too
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285 ;; drastically to keep it. --Stig
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286 (defun add-submenu (menu-path submenu &optional before)
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287 "Add a menu to the menubar or one of its submenus.
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288 If the named menu exists already, it is changed.
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289 MENU-PATH identifies the menu under which the new menu should be inserted.
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290 It is a list of strings; for example, (\"File\") names the top-level \"File\"
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291 menu. (\"File\" \"Foo\") names a hypothetical submenu of \"File\".
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292 If MENU-PATH is nil, then the menu will be added to the menubar itself.
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293 SUBMENU is the new menu to add.
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294 See the documentation of `current-menubar' for the syntax.
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295 BEFORE, if provided, is the name of a menu before which this menu should
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296 be added, if this menu is not on its parent already. If the menu is already
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297 present, it will not be moved."
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298 (check-menu-syntax submenu nil)
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299 (add-menu-item-1 nil menu-path submenu before))
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300
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301 (defun purecopy-menubar (x)
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302 ;; this calls purecopy on the strings, and the contents of the vectors,
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303 ;; but not on the vectors themselves, or the conses - those must be
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304 ;; writable.
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305 (cond ((vectorp x)
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306 (let ((i (length x)))
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307 (while (> i 0)
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308 (aset x (1- i) (purecopy (aref x (1- i))))
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309 (setq i (1- i))))
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310 x)
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311 ((consp x)
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312 (let ((rest x))
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313 (while rest
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314 (setcar rest (purecopy-menubar (car rest)))
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315 (setq rest (cdr rest))))
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316 x)
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317 (t
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318 (purecopy x))))
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319
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320 (defun delete-menu-item (path)
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321 "Remove the named menu item from the menu hierarchy.
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322 PATH is a list of strings which identify the position of the menu item in
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323 the menu hierarchy. The documentation of `add-submenu' describes menu-paths."
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324 (let* ((pair (condition-case nil (find-menu-item current-menubar path)
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325 (error nil)))
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326 (item (car pair))
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327 (parent (or (cdr pair) current-menubar)))
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328 (if (not item)
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329 nil
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330 ;; the menubar is the only special case, because other menus begin
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331 ;; with their name.
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332 (if (eq parent current-menubar)
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333 (setq current-menubar (delq item parent))
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334 (delq item parent))
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335 (set-menubar-dirty-flag)
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336 item)))
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337
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338 (defun relabel-menu-item (path new-name)
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339 "Change the string of the specified menu item.
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340 PATH is a list of strings which identify the position of the menu item in
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341 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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342 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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343 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\".
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344 NEW-NAME is the string that the menu item will be printed as from now on."
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345 (or (stringp new-name)
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346 (setq new-name (signal 'wrong-type-argument (list 'stringp new-name))))
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347 (let* ((menubar current-menubar)
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348 (pair (find-menu-item menubar path))
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349 (item (car pair))
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350 (menu (cdr pair)))
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351 (or item
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352 (signal 'error (list (if menu (gettext "No such menu item")
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353 (gettext "No such menu"))
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354 path)))
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355 (if (and (consp item)
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356 (stringp (car item)))
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357 (setcar item new-name)
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358 (aset item 0 new-name))
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359 (set-menubar-dirty-flag)
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360 item))
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361
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362 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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363 ;;
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364 ;; these are all bad style. Why in the world would we put evaluable forms
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365 ;; into the menubar if we didn't want people to use 'em?
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366 ;; x-font-menu.el is the only known offender right now and that ought to be
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367 ;; rehashed a bit.
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368 ;;
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369
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370 (defun enable-menu-item-1 (path toggle-p on-p)
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371 (let (menu item)
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372 (if (and (vectorp path) (> (length path) 2)) ; limited syntax checking...
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373 (setq item path)
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374 (let* ((menubar current-menubar)
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375 (pair (find-menu-item menubar path)))
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376 (setq item (car pair)
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377 menu (cdr pair))
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378 (or item
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379 (signal 'error (list (if menu
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380 "No such menu item"
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381 "No such menu")
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382 path)))
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383 (if (consp item)
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384 (error "%S is a menu, not a menu item" path))))
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385 (if (or (> (length item) 4)
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386 (and (symbolp (aref item 2))
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387 (= ?: (aref (symbol-name (aref item 2)) 0))))
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388 ;; plist-like syntax
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389 (let ((i 2)
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390 (keyword (if toggle-p :selected :active))
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391 (ok nil))
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392 (while (< i (length item))
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393 (cond ((eq (aref item i) keyword)
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394 (aset item (1+ i) on-p)
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395 (setq ok t)))
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396 (setq i (+ i 2)))
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397 (cond (ok nil)
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398 (toggle-p
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399 (signal 'error (list "not a toggle menu item" item)))
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400 (t
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401 ;; Need to copy the item to extend it, sigh...
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402 (let ((cons (memq item menu))
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403 (new-item (vconcat item (list keyword on-p))))
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404 (if cons
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405 (setcar cons (setq item new-item))
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406 (if menu
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407 (error "couldn't find %S on its parent?" item)
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408 (error "no %S slot to set: %S" keyword item)))))))
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409 ;; positional syntax
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410 (if toggle-p
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411 (signal 'error (list "not a toggle menu item" item))
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412 (aset item 2 on-p)))
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413 (set-menubar-dirty-flag)
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414 item))
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415
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416 (defun enable-menu-item (path)
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417 "Make the named menu item be selectable.
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418 PATH is a list of strings which identify the position of the menu item in
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419 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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420 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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421 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\"."
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422 (enable-menu-item-1 path nil t))
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423
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424 (defun disable-menu-item (path)
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425 "Make the named menu item be unselectable.
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426 PATH is a list of strings which identify the position of the menu item in
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427 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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428 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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429 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\"."
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430 (enable-menu-item-1 path nil nil))
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431
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432 (defun select-toggle-menu-item (path)
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433 "Make the named toggle- or radio-style menu item be in the `selected' state.
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434 PATH is a list of strings which identify the position of the menu item in
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435 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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436 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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437 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\"."
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438 (enable-menu-item-1 path t t))
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439
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440 (defun deselect-toggle-menu-item (path)
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441 "Make the named toggle- or radio-style menu item be in the `unselected' state.
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442 PATH is a list of strings which identify the position of the menu item in
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443 the menu hierarchy. (\"File\" \"Save\") means the menu item called \"Save\"
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444 under the toplevel \"File\" menu. (\"Menu\" \"Foo\" \"Item\") means the
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445 menu item called \"Item\" under the \"Foo\" submenu of \"Menu\"."
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446 (enable-menu-item-1 path t nil))
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447
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448
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449 (defun get-popup-menu-response (menu-desc &optional event)
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450 "Pop up the given menu and wait for a response.
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451 This blocks until the response is received, and returns the misc-user
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452 event that encapsulates the response. To execute it, you can do
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453 (funcall (event-function response) (event-object response))
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454 If no response was received, nil is returned.
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455
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456 MENU-DESC and EVENT are as in the call to `popup-menu'."
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457 ;; partially stolen from w3
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458 (let ((echo-keystrokes 0)
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459 new-event)
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460 (popup-menu menu-desc event)
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461 (catch 'popup-done
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462 (while t
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463 (setq new-event (next-command-event new-event))
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464 (cond ((misc-user-event-p new-event)
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465 (throw 'popup-done new-event))
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466 ((not (popup-up-p))
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467 (setq unread-command-events (cons new-event
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468 unread-command-events))
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469 (throw 'popup-done nil))
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470 ((button-release-event-p new-event);; don't beep twice
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471 nil)
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472 ((event-matches-key-specifier-p (quit-char))
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473 (signal 'quit nil))
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474 (t
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475 (beep)
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476 (message "please make a choice from the menu.")))))))
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477
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478 (defun popup-menu-and-execute-in-window (menu-desc event)
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479 "Pop up the given menu and execute its response in EVENT's window.
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480 This blocks until the response is received, temporarily selects
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481 EVENT's window, and executes the command specified in the response.
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482 EVENT can also be a window. See `popup-menu' for the semantics of
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483 MENU-DESC."
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484 (let ((response
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485 (get-popup-menu-response menu-desc
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486 (and (eventp event) event))))
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487 (and (misc-user-event-p response)
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488 (save-selected-window
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489 (select-window (if (windowp event) event
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490 (event-window event)))
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491 (funcall (event-function response)
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492 (event-object response))))))
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493
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494
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495 (provide 'menubar)
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