1;;; tool-bar.el --- setting up the tool bar
2;;
3;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
4;;   2005, 2006, 2007 Free Software Foundation, Inc.
5;;
6;; Author: Dave Love <fx@gnu.org>
7;; Keywords: mouse frames
8
9;; This file is part of GNU Emacs.
10
11;; GNU Emacs is free software; you can redistribute it and/or modify
12;; it under the terms of the GNU General Public License as published by
13;; the Free Software Foundation; either version 2, or (at your option)
14;; any later version.
15
16;; GNU Emacs is distributed in the hope that it will be useful,
17;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19;; GNU General Public License for more details.
20
21;; You should have received a copy of the GNU General Public License
22;; along with GNU Emacs; see the file COPYING.  If not, write to the
23;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24;; Boston, MA 02110-1301, USA.
25
26;;; Commentary:
27
28;; Provides `tool-bar-mode' to control display of the tool-bar and
29;; bindings for the global tool bar with convenience functions
30;; `tool-bar-add-item' and `tool-bar-add-item-from-menu'.
31
32;; The normal global binding for [tool-bar] (below) uses the value of
33;; `tool-bar-map' as the actual keymap to define the tool bar.  Modes
34;; may either bind items under the [tool-bar] prefix key of the local
35;; map to add to the global bar or may set `tool-bar-map'
36;; buffer-locally to override it.  (Some items are removed from the
37;; global bar in modes which have `special' as their `mode-class'
38;; property.)
39
40;; Todo: Somehow make tool bars easily customizable by the naive?
41
42;;; Code:
43
44;; The autoload cookie doesn't work when preloading.
45;; Deleting it means invoking this command won't work
46;; when you are on a tty.  I hope that won't cause too much trouble -- rms.
47(define-minor-mode tool-bar-mode
48  "Toggle use of the tool bar.
49With numeric ARG, display the tool bar if and only if ARG is positive.
50
51See `tool-bar-add-item' and `tool-bar-add-item-from-menu' for
52conveniently adding tool bar items."
53  :init-value nil
54  :global t
55  :group 'mouse
56  :group 'frames
57  (and (display-images-p)
58       (let ((lines (if tool-bar-mode 1 0)))
59	 ;; Alter existing frames...
60	 (mapc (lambda (frame)
61		 (modify-frame-parameters frame
62					  (list (cons 'tool-bar-lines lines))))
63	       (frame-list))
64	 ;; ...and future ones.
65	 (let ((elt (assq 'tool-bar-lines default-frame-alist)))
66	   (if elt
67	       (setcdr elt lines)
68	     (add-to-list 'default-frame-alist (cons 'tool-bar-lines lines)))))
69       (if (and tool-bar-mode
70		(display-graphic-p)
71		(= 1 (length (default-value 'tool-bar-map)))) ; not yet setup
72	   (tool-bar-setup))))
73
74;;;###autoload
75;; We want to pretend the toolbar by standard is on, as this will make
76;; customize consider disabling the toolbar a customization, and save
77;; that.  We could do this for real by setting :init-value above, but
78;; that would turn on the toolbar in MS Windows where it is currently
79;; useless, and it would overwrite disabling the tool bar from X
80;; resources.  If anyone want to implement this in a cleaner way,
81;; please do so.
82;; -- Per Abrahamsen <abraham@dina.kvl.dk> 2002-02-21.
83(put 'tool-bar-mode 'standard-value '(t))
84
85(defvar tool-bar-map (make-sparse-keymap)
86  "Keymap for the tool bar.
87Define this locally to override the global tool bar.")
88
89(global-set-key [tool-bar]
90		'(menu-item "tool bar" ignore
91			    :filter (lambda (ignore) tool-bar-map)))
92
93;;;###autoload
94(defun tool-bar-add-item (icon def key &rest props)
95  "Add an item to the tool bar.
96ICON names the image, DEF is the key definition and KEY is a symbol
97for the fake function key in the menu keymap.  Remaining arguments
98PROPS are additional items to add to the menu item specification.  See
99Info node `(elisp)Tool Bar'.  Items are added from left to right.
100
101ICON is the base name of a file containing the image to use.  The
102function will first try to use low-color/ICON.xpm if display-color-cells
103is less or equal to 256, then ICON.xpm, then ICON.pbm, and finally
104ICON.xbm, using `find-image'.
105
106Use this function only to make bindings in the global value of `tool-bar-map'.
107To define items in any other map, use `tool-bar-local-item'."
108  (apply 'tool-bar-local-item icon def key tool-bar-map props))
109
110;;;###autoload
111(defun tool-bar-local-item (icon def key map &rest props)
112  "Add an item to the tool bar in map MAP.
113ICON names the image, DEF is the key definition and KEY is a symbol
114for the fake function key in the menu keymap.  Remaining arguments
115PROPS are additional items to add to the menu item specification.  See
116Info node `(elisp)Tool Bar'.  Items are added from left to right.
117
118ICON is the base name of a file containing the image to use.  The
119function will first try to use low-color/ICON.xpm if display-color-cells
120is less or equal to 256, then ICON.xpm, then ICON.pbm, and finally
121ICON.xbm, using `find-image'."
122  (let* ((fg (face-attribute 'tool-bar :foreground))
123	 (bg (face-attribute 'tool-bar :background))
124	 (colors (nconc (if (eq fg 'unspecified) nil (list :foreground fg))
125			(if (eq bg 'unspecified) nil (list :background bg))))
126	 (xpm-spec (list :type 'xpm :file (concat icon ".xpm")))
127	 (xpm-lo-spec (if (> (display-color-cells) 256)
128			  nil
129			(list :type 'xpm :file
130                              (concat "low-color/" icon ".xpm"))))
131	 (pbm-spec (append (list :type 'pbm :file
132                                 (concat icon ".pbm")) colors))
133	 (xbm-spec (append (list :type 'xbm :file
134                                 (concat icon ".xbm")) colors))
135	 (image (find-image
136		(if (display-color-p)
137		    (list xpm-lo-spec xpm-spec pbm-spec xbm-spec)
138		  (list pbm-spec xbm-spec xpm-lo-spec xpm-spec)))))
139
140    (when (and (display-images-p) image)
141      (unless (image-mask-p image)
142	(setq image (append image '(:mask heuristic))))
143      (define-key-after map (vector key)
144	`(menu-item ,(symbol-name key) ,def :image ,image ,@props)))))
145
146;;;###autoload
147(defun tool-bar-add-item-from-menu (command icon &optional map &rest props)
148  "Define tool bar binding for COMMAND in keymap MAP using the given ICON.
149This makes a binding for COMMAND in `tool-bar-map', copying its
150binding from the menu bar in MAP (which defaults to `global-map'), but
151modifies the binding by adding an image specification for ICON.  It
152finds ICON just like `tool-bar-add-item'.  PROPS are additional
153properties to add to the binding.
154
155MAP must contain appropriate binding for `[menu-bar]' which holds a keymap.
156
157Use this function only to make bindings in the global value of `tool-bar-map'.
158To define items in any other map, use `tool-bar-local-item-from-menu'."
159  (apply 'tool-bar-local-item-from-menu command icon
160	 (default-value 'tool-bar-map) map props))
161
162;;;###autoload
163(defun tool-bar-local-item-from-menu (command icon in-map &optional from-map &rest props)
164  "Define local tool bar binding for COMMAND using the given ICON.
165This makes a binding for COMMAND in IN-MAP, copying its binding from
166the menu bar in FROM-MAP (which defaults to `global-map'), but
167modifies the binding by adding an image specification for ICON.  It
168finds ICON just like `tool-bar-add-item'.  PROPS are additional
169properties to add to the binding.
170
171FROM-MAP must contain appropriate binding for `[menu-bar]' which
172holds a keymap."
173  (unless from-map
174    (setq from-map global-map))
175  (let* ((menu-bar-map (lookup-key from-map [menu-bar]))
176	 (keys (where-is-internal command menu-bar-map))
177	 (fg (face-attribute 'tool-bar :foreground))
178	 (bg (face-attribute 'tool-bar :background))
179	 (colors (nconc (if (eq fg 'unspecified) nil (list :foreground fg))
180			(if (eq bg 'unspecified) nil (list :background bg))))
181	 (xpm-spec (list :type 'xpm :file (concat icon ".xpm")))
182	 (xpm-lo-spec (if (> (display-color-cells) 256)
183			  nil
184			(list :type 'xpm :file
185                              (concat "low-color/" icon ".xpm"))))
186	 (pbm-spec (append (list :type 'pbm :file
187                                 (concat icon ".pbm")) colors))
188	 (xbm-spec (append (list :type 'xbm :file
189                                 (concat icon ".xbm")) colors))
190	 (spec (if (display-color-p)
191		   (list xpm-lo-spec xpm-spec pbm-spec xbm-spec)
192		 (list pbm-spec xbm-spec xpm-lo-spec xpm-spec)))
193	 (image (find-image spec))
194	 submap key)
195    (when (and (display-images-p) image)
196      ;; We'll pick up the last valid entry in the list of keys if
197      ;; there's more than one.
198      (dolist (k keys)
199	;; We're looking for a binding of the command in a submap of
200	;; the menu bar map, so the key sequence must be two or more
201	;; long.
202	(if (and (vectorp k)
203		 (> (length k) 1))
204	    (let ((m (lookup-key menu-bar-map (substring k 0 -1)))
205		  ;; Last element in the bound key sequence:
206		  (kk (aref k (1- (length k)))))
207	      (if (and (keymapp m)
208		       (symbolp kk))
209		  (setq submap m
210			key kk)))))
211      (when (and (symbolp submap) (boundp submap))
212	(setq submap (eval submap)))
213      (unless (image-mask-p image)
214	(setq image (append image '(:mask heuristic))))
215      (let ((defn (assq key (cdr submap))))
216	(if (eq (cadr defn) 'menu-item)
217	    (define-key-after in-map (vector key)
218	      (append (cdr defn) (list :image image) props))
219	  (setq defn (cdr defn))
220	  (define-key-after in-map (vector key)
221	    (let ((rest (cdr defn)))
222	      ;; If the rest of the definition starts
223	      ;; with a list of menu cache info, get rid of that.
224	      (if (and (consp rest) (consp (car rest)))
225		  (setq rest (cdr rest)))
226	      (append `(menu-item ,(car defn) ,rest)
227		      (list :image image) props))))))))
228
229;;; Set up some global items.  Additions/deletions up for grabs.
230
231(defun tool-bar-setup ()
232  ;; People say it's bad to have EXIT on the tool bar, since users
233  ;; might inadvertently click that button.
234  ;;(tool-bar-add-item-from-menu 'save-buffers-kill-emacs "exit")
235  (tool-bar-add-item-from-menu 'find-file "new")
236  (tool-bar-add-item-from-menu 'menu-find-file-existing "open")
237  (tool-bar-add-item-from-menu 'dired "diropen")
238  (tool-bar-add-item-from-menu 'kill-this-buffer "close")
239  (tool-bar-add-item-from-menu 'save-buffer "save" nil
240			       :visible '(or buffer-file-name
241					     (not (eq 'special
242						      (get major-mode
243							   'mode-class)))))
244  (tool-bar-add-item-from-menu 'write-file "saveas" nil
245			       :visible '(or buffer-file-name
246					     (not (eq 'special
247						      (get major-mode
248							   'mode-class)))))
249  (tool-bar-add-item-from-menu 'undo "undo" nil
250			       :visible '(not (eq 'special (get major-mode
251								'mode-class))))
252  (tool-bar-add-item-from-menu (lookup-key menu-bar-edit-menu [cut])
253			       "cut" nil
254			       :visible '(not (eq 'special (get major-mode
255								'mode-class))))
256  (tool-bar-add-item-from-menu (lookup-key menu-bar-edit-menu [copy])
257			       "copy")
258  (tool-bar-add-item-from-menu (lookup-key menu-bar-edit-menu [paste])
259			       "paste" nil
260			       :visible '(not (eq 'special (get major-mode
261								'mode-class))))
262  (tool-bar-add-item-from-menu 'nonincremental-search-forward "search")
263  ;;(tool-bar-add-item-from-menu 'ispell-buffer "spell")
264
265  ;; There's no icon appropriate for News and we need a command rather
266  ;; than a lambda for Read Mail.
267  ;;(tool-bar-add-item-from-menu 'compose-mail "mail/compose")
268
269  (tool-bar-add-item-from-menu 'print-buffer "print")
270
271  ;; tool-bar-add-item-from-menu itself operates on
272  ;; (default-value 'tool-bar-map), but when we don't use that function,
273  ;; we must explicitly operate on the default value.
274
275  (let ((tool-bar-map (default-value 'tool-bar-map)))
276    (tool-bar-add-item "preferences" 'customize 'customize
277		       :help "Edit preferences (customize)")
278
279    (tool-bar-add-item "help" (lambda ()
280				(interactive)
281				(popup-menu menu-bar-help-menu))
282		       'help
283		       :help "Pop up the Help menu"))
284  )
285
286(provide 'tool-bar)
287
288;;; arch-tag: 15f30f0a-d0d7-4d50-bbb7-f48fd0c8582f
289;;; tool-bar.el ends here
290