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[emacs.git] / lisp / facemenu.el
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1 ;;; facemenu.el --- create a face menu for interactively adding fonts to text
3 ;; Copyright (C) 1994, 1995, 1996, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006 Free Software Foundation, Inc.
6 ;; Author: Boris Goldowsky <boris@gnu.org>
7 ;; Keywords: faces
9 ;; This file is part of GNU Emacs.
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.
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.
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.
26 ;;; Commentary:
28 ;; This file defines a menu of faces (bold, italic, etc) which allows you to
29 ;; set the face used for a region of the buffer. Some faces also have
30 ;; keybindings, which are shown in the menu.
32 ;; The menu also contains submenus for indentation and justification-changing
33 ;; commands.
35 ;;; Usage:
36 ;; Selecting a face from the menu or typing the keyboard equivalent will
37 ;; change the region to use that face. If you use transient-mark-mode and the
38 ;; region is not active, the face will be remembered and used for the next
39 ;; insertion. It will be forgotten if you move point or make other
40 ;; modifications before inserting or typing anything.
42 ;; Faces can be selected from the keyboard as well.
43 ;; The standard keybindings are M-o (or ESC o) + letter:
44 ;; M-o i = "set italic", M-o b = "set bold", etc.
46 ;;; Customization:
47 ;; An alternative set of keybindings that may be easier to type can be set up
48 ;; using "Alt" or "Hyper" keys. This requires that you either have or create
49 ;; an Alt or Hyper key on your keyboard. On my keyboard, there is a key
50 ;; labeled "Alt", but to make it act as an Alt key I have to put this command
51 ;; into my .xinitrc:
52 ;; xmodmap -e "add Mod3 = Alt_L"
53 ;; Or, I can make it into a Hyper key with this:
54 ;; xmodmap -e "keysym Alt_L = Hyper_L" -e "add Mod2 = Hyper_L"
55 ;; Check with local X-perts for how to do it on your system.
56 ;; Then you can define your keybindings with code like this in your .emacs:
57 ;; (setq facemenu-keybindings
58 ;; '((default . [?\H-d])
59 ;; (bold . [?\H-b])
60 ;; (italic . [?\H-i])
61 ;; (bold-italic . [?\H-l])
62 ;; (underline . [?\H-u])))
63 ;; (facemenu-update)
64 ;; (setq facemenu-keymap global-map)
65 ;; (define-key global-map [?\H-c] 'facemenu-set-foreground) ; set fg color
66 ;; (define-key global-map [?\H-C] 'facemenu-set-background) ; set bg color
68 ;; The order of the faces that appear in the menu and their keybindings can be
69 ;; controlled by setting the variables `facemenu-keybindings' and
70 ;; `facemenu-new-faces-at-end'. List faces that you want to use in documents
71 ;; in `facemenu-listed-faces'.
73 ;;; Known Problems:
74 ;; Bold and Italic do not combine to create bold-italic if you select them
75 ;; both, although most other combinations (eg bold + underline + some color)
76 ;; do the intuitive thing.
78 ;; There is at present no way to display what the faces look like in
79 ;; the menu itself.
81 ;; `list-faces-display' shows the faces in a different order than
82 ;; this menu, which could be confusing. I do /not/ sort the list
83 ;; alphabetically, because I like the default order: it puts the most
84 ;; basic, common fonts first.
86 ;; Please send me any other problems, comments or ideas.
88 ;;; Code:
90 (eval-when-compile
91 (require 'help)
92 (require 'button))
94 ;;; Provide some binding for startup:
95 ;;;###autoload (define-key global-map "\M-o" 'facemenu-keymap)
96 ;;;###autoload (autoload 'facemenu-keymap "facemenu" "Keymap for face-changing commands." t 'keymap)
98 ;; Global bindings:
99 (define-key global-map [C-down-mouse-2] 'facemenu-menu)
100 (define-key global-map "\M-o" 'facemenu-keymap)
102 (defgroup facemenu nil
103 "Create a face menu for interactively adding fonts to text."
104 :group 'faces
105 :prefix "facemenu-")
107 (defcustom facemenu-keybindings
108 '((default . "d")
109 (bold . "b")
110 (italic . "i")
111 (bold-italic . "l") ; {bold} intersect {italic} = {l}
112 (underline . "u"))
113 "Alist of interesting faces and keybindings.
114 Each element is itself a list: the car is the name of the face,
115 the next element is the key to use as a keyboard equivalent of the menu item;
116 the binding is made in `facemenu-keymap'.
118 The faces specifically mentioned in this list are put at the top of
119 the menu, in the order specified. All other faces which are defined
120 in `facemenu-listed-faces' are listed after them, but get no
121 keyboard equivalents.
123 If you change this variable after loading facemenu.el, you will need to call
124 `facemenu-update' to make it take effect."
125 :type '(repeat (cons face string))
126 :group 'facemenu)
128 (defcustom facemenu-new-faces-at-end t
129 "*Where in the menu to insert newly-created faces.
130 This should be nil to put them at the top of the menu, or t to put them
131 just before \"Other\" at the end."
132 :type 'boolean
133 :group 'facemenu)
135 (defcustom facemenu-listed-faces nil
136 "*List of faces to include in the Face menu.
137 Each element should be a symbol, the name of a face.
138 The \"basic \" faces in `facemenu-keybindings' are automatically
139 added to the Face menu, and need not be in this list.
141 This value takes effect when you load facemenu.el. If the
142 list includes symbols which are not defined as faces, they
143 are ignored; however, subsequently defining or creating
144 those faces adds them to the menu then. You can call
145 `facemenu-update' to recalculate the menu contents, such as
146 if you change the value of this variable,
148 If this variable is t, all faces that you apply to text
149 using the face menu commands (even by name), and all faces
150 that you define or create, are added to the menu. You may
151 find it useful to set this variable to t temporarily while
152 you define some faces, so that they will be added. However,
153 if the value is no longer t and you call `facemenu-update',
154 it will remove any faces not explicitly in the list."
155 :type '(choice (const :tag "List all faces" t)
156 (const :tag "None" nil)
157 (repeat symbol))
158 :group 'facemenu
159 :version "22.1")
161 ;;;###autoload
162 (defvar facemenu-face-menu
163 (let ((map (make-sparse-keymap "Face")))
164 (define-key map "o" (cons "Other..." 'facemenu-set-face))
165 map)
166 "Menu keymap for faces.")
167 ;;;###autoload
168 (defalias 'facemenu-face-menu facemenu-face-menu)
169 (put 'facemenu-face-menu 'menu-enable '(facemenu-enable-faces-p))
171 ;;;###autoload
172 (defvar facemenu-foreground-menu
173 (let ((map (make-sparse-keymap "Foreground Color")))
174 (define-key map "o" (cons "Other..." 'facemenu-set-foreground))
175 map)
176 "Menu keymap for foreground colors.")
177 ;;;###autoload
178 (defalias 'facemenu-foreground-menu facemenu-foreground-menu)
179 (put 'facemenu-foreground-menu 'menu-enable '(facemenu-enable-faces-p))
181 ;;;###autoload
182 (defvar facemenu-background-menu
183 (let ((map (make-sparse-keymap "Background Color")))
184 (define-key map "o" (cons "Other..." 'facemenu-set-background))
185 map)
186 "Menu keymap for background colors.")
187 ;;;###autoload
188 (defalias 'facemenu-background-menu facemenu-background-menu)
189 (put 'facemenu-background-menu 'menu-enable '(facemenu-enable-faces-p))
191 ;;; Condition for enabling menu items that set faces.
192 (defun facemenu-enable-faces-p ()
193 (not (and font-lock-mode font-lock-defaults)))
195 ;;;###autoload
196 (defvar facemenu-special-menu
197 (let ((map (make-sparse-keymap "Special")))
198 (define-key map [?s] (cons (purecopy "Remove Special")
199 'facemenu-remove-special))
200 (define-key map [?t] (cons (purecopy "Intangible")
201 'facemenu-set-intangible))
202 (define-key map [?v] (cons (purecopy "Invisible")
203 'facemenu-set-invisible))
204 (define-key map [?r] (cons (purecopy "Read-Only")
205 'facemenu-set-read-only))
206 map)
207 "Menu keymap for non-face text-properties.")
208 ;;;###autoload
209 (defalias 'facemenu-special-menu facemenu-special-menu)
211 ;;;###autoload
212 (defvar facemenu-justification-menu
213 (let ((map (make-sparse-keymap "Justification")))
214 (define-key map [?c] (cons (purecopy "Center") 'set-justification-center))
215 (define-key map [?b] (cons (purecopy "Full") 'set-justification-full))
216 (define-key map [?r] (cons (purecopy "Right") 'set-justification-right))
217 (define-key map [?l] (cons (purecopy "Left") 'set-justification-left))
218 (define-key map [?u] (cons (purecopy "Unfilled") 'set-justification-none))
219 map)
220 "Submenu for text justification commands.")
221 ;;;###autoload
222 (defalias 'facemenu-justification-menu facemenu-justification-menu)
224 ;;;###autoload
225 (defvar facemenu-indentation-menu
226 (let ((map (make-sparse-keymap "Indentation")))
227 (define-key map [decrease-right-margin]
228 (cons (purecopy "Indent Right Less") 'decrease-right-margin))
229 (define-key map [increase-right-margin]
230 (cons (purecopy "Indent Right More") 'increase-right-margin))
231 (define-key map [decrease-left-margin]
232 (cons (purecopy "Indent Less") 'decrease-left-margin))
233 (define-key map [increase-left-margin]
234 (cons (purecopy "Indent More") 'increase-left-margin))
235 map)
236 "Submenu for indentation commands.")
237 ;;;###autoload
238 (defalias 'facemenu-indentation-menu facemenu-indentation-menu)
240 ;; This is split up to avoid an overlong line in loaddefs.el.
241 ;;;###autoload
242 (defvar facemenu-menu nil
243 "Facemenu top-level menu keymap.")
244 ;;;###autoload
245 (setq facemenu-menu (make-sparse-keymap "Text Properties"))
246 ;;;###autoload
247 (let ((map facemenu-menu))
248 (define-key map [dc] (cons (purecopy "Display Colors") 'list-colors-display))
249 (define-key map [df] (cons (purecopy "Display Faces") 'list-faces-display))
250 (define-key map [dp] (cons (purecopy "Describe Properties")
251 'describe-text-properties))
252 (define-key map [ra] (cons (purecopy "Remove Text Properties")
253 'facemenu-remove-all))
254 (define-key map [rm] (cons (purecopy "Remove Face Properties")
255 'facemenu-remove-face-props))
256 (define-key map [s1] (list (purecopy "--"))))
257 ;;;###autoload
258 (let ((map facemenu-menu))
259 (define-key map [in] (cons (purecopy "Indentation")
260 'facemenu-indentation-menu))
261 (define-key map [ju] (cons (purecopy "Justification")
262 'facemenu-justification-menu))
263 (define-key map [s2] (list (purecopy "--")))
264 (define-key map [sp] (cons (purecopy "Special Properties")
265 'facemenu-special-menu))
266 (define-key map [bg] (cons (purecopy "Background Color")
267 'facemenu-background-menu))
268 (define-key map [fg] (cons (purecopy "Foreground Color")
269 'facemenu-foreground-menu))
270 (define-key map [fc] (cons (purecopy "Face")
271 'facemenu-face-menu)))
272 ;;;###autoload
273 (defalias 'facemenu-menu facemenu-menu)
275 (defvar facemenu-keymap
276 (let ((map (make-sparse-keymap "Set face")))
277 (define-key map "o" (cons (purecopy "Other...") 'facemenu-set-face))
278 map)
279 "Keymap for face-changing commands.
280 `Facemenu-update' fills in the keymap according to the bindings
281 requested in `facemenu-keybindings'.")
282 (defalias 'facemenu-keymap facemenu-keymap)
285 (defcustom facemenu-add-face-function nil
286 "Function called at beginning of text to change or nil.
287 This function is passed the FACE to set and END of text to change, and must
288 return a string which is inserted. It may set `facemenu-end-add-face'."
289 :type '(choice (const :tag "None" nil)
290 function)
291 :group 'facemenu)
293 (defcustom facemenu-end-add-face nil
294 "String to insert or function called at end of text to change or nil.
295 This function is passed the FACE to set, and must return a string which is
296 inserted."
297 :type '(choice (const :tag "None" nil)
298 string
299 function)
300 :group 'facemenu)
302 (defcustom facemenu-remove-face-function nil
303 "When non-nil, this is a function called to remove faces.
304 This function is passed the START and END of text to change.
305 May also be t meaning to use `facemenu-add-face-function'."
306 :type '(choice (const :tag "None" nil)
307 (const :tag "Use add-face" t)
308 function)
309 :group 'facemenu)
311 ;;; Internal Variables
313 (defvar facemenu-color-alist nil
314 "Alist of colors, used for completion.
315 If this is nil, then the value of (defined-colors) is used.")
317 (defun facemenu-update ()
318 "Add or update the \"Face\" menu in the menu bar.
319 You can call this to update things if you change any of the menu configuration
320 variables."
321 (interactive)
323 ;; Add each defined face to the menu.
324 (facemenu-iterate 'facemenu-add-new-face
325 (facemenu-complete-face-list facemenu-keybindings)))
327 ;;;###autoload
328 (defun facemenu-set-face (face &optional start end)
329 "Apply FACE to the region or next character typed.
331 If the region is active (normally true except in Transient
332 Mark mode) and nonempty, and there is no prefix argument,
333 this command applies FACE to the region. Otherwise, it applies FACE
334 to the faces to use for the next character
335 inserted. (Moving point or switching buffers before typing
336 a character to insert cancels the specification.)
338 If FACE is `default', to \"apply\" it means clearing
339 the list of faces to be used. For any other value of FACE,
340 to \"apply\" it means putting FACE at the front of the list
341 of faces to be used, and removing any faces further
342 along in the list that would be completely overridden by
343 preceding faces (including FACE).
345 This command can also add FACE to the menu of faces,
346 if `facemenu-listed-faces' says to do that."
347 (interactive (list (progn
348 (barf-if-buffer-read-only)
349 (read-face-name "Use face"))
350 (if (and mark-active (not current-prefix-arg))
351 (region-beginning))
352 (if (and mark-active (not current-prefix-arg))
353 (region-end))))
354 (facemenu-add-new-face face)
355 (facemenu-add-face face start end))
357 ;;;###autoload
358 (defun facemenu-set-foreground (color &optional start end)
359 "Set the foreground COLOR of the region or next character typed.
360 This command reads the color in the minibuffer.
362 If the region is active (normally true except in Transient Mark mode)
363 and there is no prefix argument, this command sets the region to the
364 requested face.
366 Otherwise, this command specifies the face for the next character
367 inserted. Moving point or switching buffers before
368 typing a character to insert cancels the specification."
369 (interactive (list (progn
370 (barf-if-buffer-read-only)
371 (facemenu-read-color "Foreground color: "))
372 (if (and mark-active (not current-prefix-arg))
373 (region-beginning))
374 (if (and mark-active (not current-prefix-arg))
375 (region-end))))
376 (facemenu-set-face-from-menu
377 (facemenu-add-new-color color 'facemenu-foreground-menu)
378 start end))
380 ;;;###autoload
381 (defun facemenu-set-background (color &optional start end)
382 "Set the background COLOR of the region or next character typed.
383 This command reads the color in the minibuffer.
385 If the region is active (normally true except in Transient Mark mode)
386 and there is no prefix argument, this command sets the region to the
387 requested face.
389 Otherwise, this command specifies the face for the next character
390 inserted. Moving point or switching buffers before
391 typing a character to insert cancels the specification."
392 (interactive (list (progn
393 (barf-if-buffer-read-only)
394 (facemenu-read-color "Background color: "))
395 (if (and mark-active (not current-prefix-arg))
396 (region-beginning))
397 (if (and mark-active (not current-prefix-arg))
398 (region-end))))
399 (facemenu-set-face-from-menu
400 (facemenu-add-new-color color 'facemenu-background-menu)
401 start end))
403 ;;;###autoload
404 (defun facemenu-set-face-from-menu (face start end)
405 "Set the FACE of the region or next character typed.
406 This function is designed to be called from a menu; FACE is determined
407 using the event type of the menu entry. If FACE is a symbol whose
408 name starts with \"fg:\" or \"bg:\", then this functions sets the
409 foreground or background to the color specified by the rest of the
410 symbol's name. Any other symbol is considered the name of a face.
412 If the region is active (normally true except in Transient Mark mode)
413 and there is no prefix argument, this command sets the region to the
414 requested face.
416 Otherwise, this command specifies the face for the next character
417 inserted. Moving point or switching buffers before typing a character
418 to insert cancels the specification."
419 (interactive (list last-command-event
420 (if (and mark-active (not current-prefix-arg))
421 (region-beginning))
422 (if (and mark-active (not current-prefix-arg))
423 (region-end))))
424 (barf-if-buffer-read-only)
425 (facemenu-add-face
426 (let ((fn (symbol-name face)))
427 (if (string-match "\\`\\([fb]\\)g:\\(.+\\)" fn)
428 (list (list (if (string= (match-string 1 fn) "f")
429 :foreground
430 :background)
431 (match-string 2 fn)))
432 face))
433 start end))
435 ;;;###autoload
436 (defun facemenu-set-invisible (start end)
437 "Make the region invisible.
438 This sets the `invisible' text property; it can be undone with
439 `facemenu-remove-special'."
440 (interactive "r")
441 (add-text-properties start end '(invisible t)))
443 ;;;###autoload
444 (defun facemenu-set-intangible (start end)
445 "Make the region intangible: disallow moving into it.
446 This sets the `intangible' text property; it can be undone with
447 `facemenu-remove-special'."
448 (interactive "r")
449 (add-text-properties start end '(intangible t)))
451 ;;;###autoload
452 (defun facemenu-set-read-only (start end)
453 "Make the region unmodifiable.
454 This sets the `read-only' text property; it can be undone with
455 `facemenu-remove-special'."
456 (interactive "r")
457 (add-text-properties start end '(read-only t)))
459 ;;;###autoload
460 (defun facemenu-remove-face-props (start end)
461 "Remove `face' and `mouse-face' text properties."
462 (interactive "*r") ; error if buffer is read-only despite the next line.
463 (let ((inhibit-read-only t))
464 (remove-text-properties
465 start end '(face nil mouse-face nil))))
467 ;;;###autoload
468 (defun facemenu-remove-all (start end)
469 "Remove all text properties from the region."
470 (interactive "*r") ; error if buffer is read-only despite the next line.
471 (let ((inhibit-read-only t))
472 (set-text-properties start end nil)))
474 ;;;###autoload
475 (defun facemenu-remove-special (start end)
476 "Remove all the \"special\" text properties from the region.
477 These special properties include `invisible', `intangible' and `read-only'."
478 (interactive "*r") ; error if buffer is read-only despite the next line.
479 (let ((inhibit-read-only t))
480 (remove-text-properties
481 start end '(invisible nil intangible nil read-only nil))))
483 ;;;###autoload
484 (defun facemenu-read-color (&optional prompt)
485 "Read a color using the minibuffer."
486 (let* ((completion-ignore-case t)
487 (col (completing-read (or prompt "Color: ")
488 (or facemenu-color-alist
489 (defined-colors))
490 nil t)))
491 (if (equal "" col)
493 col)))
495 ;;;###autoload
496 (defun list-colors-display (&optional list buffer-name)
497 "Display names of defined colors, and show what they look like.
498 If the optional argument LIST is non-nil, it should be a list of
499 colors to display. Otherwise, this command computes a list of
500 colors that the current display can handle. If the optional
501 argument BUFFER-NAME is nil, it defaults to *Colors*."
502 (interactive)
503 (when (and (null list) (> (display-color-cells) 0))
504 (setq list (list-colors-duplicates (defined-colors)))
505 (when (memq (display-visual-class) '(gray-scale pseudo-color direct-color))
506 ;; Don't show more than what the display can handle.
507 (let ((lc (nthcdr (1- (display-color-cells)) list)))
508 (if lc
509 (setcdr lc nil)))))
510 (with-output-to-temp-buffer (or buffer-name "*Colors*")
511 (save-excursion
512 (set-buffer standard-output)
513 (setq truncate-lines t)
514 (if temp-buffer-show-function
515 (list-colors-print list)
516 ;; Call list-colors-print from temp-buffer-show-hook
517 ;; to get the right value of window-width in list-colors-print
518 ;; after the buffer is displayed.
519 (add-hook 'temp-buffer-show-hook
520 (lambda () (list-colors-print list)) nil t)))))
522 (defun list-colors-print (list)
523 (dolist (color list)
524 (if (consp color)
525 (if (cdr color)
526 (setq color (sort color (lambda (a b)
527 (string< (downcase a)
528 (downcase b))))))
529 (setq color (list color)))
530 (put-text-property
531 (prog1 (point)
532 (insert (car color))
533 (indent-to 22))
534 (point)
535 'face (cons 'background-color (car color)))
536 (put-text-property
537 (prog1 (point)
538 (insert " " (if (cdr color)
539 (mapconcat 'identity (cdr color) ", ")
540 (car color))))
541 (point)
542 'face (cons 'foreground-color (car color)))
543 (indent-to (max (- (window-width) 8) 44))
544 (insert (apply 'format "#%02x%02x%02x"
545 (mapcar (lambda (c) (lsh c -8))
546 (color-values (car color)))))
548 (insert "\n"))
549 (goto-char (point-min)))
551 (defun list-colors-duplicates (&optional list)
552 "Return a list of colors with grouped duplicate colors.
553 If a color has no duplicates, then the element of the returned list
554 has the form '(COLOR-NAME). The element of the returned list with
555 duplicate colors has the form '(COLOR-NAME DUPLICATE-COLOR-NAME ...).
556 This function uses the predicate `facemenu-color-equal' to compare
557 color names. If the optional argument LIST is non-nil, it should
558 be a list of colors to display. Otherwise, this function uses
559 a list of colors that the current display can handle."
560 (let* ((list (mapcar 'list (or list (defined-colors))))
561 (l list))
562 (while (cdr l)
563 (if (and (facemenu-color-equal (car (car l)) (car (car (cdr l))))
564 (not (if (boundp 'w32-default-color-map)
565 (not (assoc (car (car l)) w32-default-color-map)))))
566 (progn
567 (setcdr (car l) (cons (car (car (cdr l))) (cdr (car l))))
568 (setcdr l (cdr (cdr l))))
569 (setq l (cdr l))))
570 list))
572 (defun facemenu-color-equal (a b)
573 "Return t if colors A and B are the same color.
574 A and B should be strings naming colors.
575 This function queries the display system to find out what the color
576 names mean. It returns nil if the colors differ or if it can't
577 determine the correct answer."
578 (cond ((equal a b) t)
579 ((equal (color-values a) (color-values b)))))
581 (defun facemenu-add-face (face &optional start end)
582 "Add FACE to text between START and END.
583 If START is nil or START to END is empty, add FACE to next typed character
584 instead. For each section of that region that has a different face property,
585 FACE will be consed onto it, and other faces that are completely hidden by
586 that will be removed from the list.
587 If `facemenu-add-face-function' and maybe `facemenu-end-add-face' are non-nil,
588 they are used to set the face information.
590 As a special case, if FACE is `default', then the region is left with NO face
591 text property. Otherwise, selecting the default face would not have any
592 effect. See `facemenu-remove-face-function'."
593 (interactive "*xFace: \nr")
594 (if (and (eq face 'default)
595 (not (eq facemenu-remove-face-function t)))
596 (if facemenu-remove-face-function
597 (funcall facemenu-remove-face-function start end)
598 (if (and start (< start end))
599 (remove-text-properties start end '(face default))
600 (setq self-insert-face 'default
601 self-insert-face-command this-command)))
602 (if facemenu-add-face-function
603 (save-excursion
604 (if end (goto-char end))
605 (save-excursion
606 (if start (goto-char start))
607 (insert-before-markers
608 (funcall facemenu-add-face-function face end)))
609 (if facemenu-end-add-face
610 (insert (if (stringp facemenu-end-add-face)
611 facemenu-end-add-face
612 (funcall facemenu-end-add-face face)))))
613 (if (and start (< start end))
614 (let ((part-start start) part-end)
615 (while (not (= part-start end))
616 (setq part-end (next-single-property-change part-start 'face
617 nil end))
618 (let ((prev (get-text-property part-start 'face)))
619 (put-text-property part-start part-end 'face
620 (if (null prev)
621 face
622 (facemenu-active-faces
623 (cons face
624 (if (listp prev)
625 prev
626 (list prev)))
627 ;; Specify the selected frame
628 ;; because nil would mean to use
629 ;; the new-frame default settings,
630 ;; and those are usually nil.
631 (selected-frame)))))
632 (setq part-start part-end)))
633 (setq self-insert-face (if (eq last-command self-insert-face-command)
634 (cons face (if (listp self-insert-face)
635 self-insert-face
636 (list self-insert-face)))
637 face)
638 self-insert-face-command this-command))))
639 (unless (facemenu-enable-faces-p)
640 (message "Font-lock mode will override any faces you set in this buffer")))
642 (defun facemenu-active-faces (face-list &optional frame)
643 "Return from FACE-LIST those faces that would be used for display.
644 This means each face attribute is not specified in a face earlier in FACE-LIST
645 and such a face is therefore active when used to display text.
646 If the optional argument FRAME is given, use the faces in that frame; otherwise
647 use the selected frame. If t, then the global, non-frame faces are used."
648 (let* ((mask-atts (copy-sequence
649 (if (consp (car face-list))
650 (face-attributes-as-vector (car face-list))
651 (or (internal-lisp-face-p (car face-list) frame)
652 (check-face (car face-list))))))
653 (active-list (list (car face-list)))
654 (face-list (cdr face-list))
655 (mask-len (length mask-atts)))
656 (while face-list
657 (if (let ((face-atts
658 (if (consp (car face-list))
659 (face-attributes-as-vector (car face-list))
660 (or (internal-lisp-face-p (car face-list) frame)
661 (check-face (car face-list)))))
662 (i mask-len)
663 (useful nil))
664 (while (>= (setq i (1- i)) 0)
665 (and (not (memq (aref face-atts i) '(nil unspecified)))
666 (memq (aref mask-atts i) '(nil unspecified))
667 (aset mask-atts i (setq useful t))))
668 useful)
669 (setq active-list (cons (car face-list) active-list)))
670 (setq face-list (cdr face-list)))
671 (nreverse active-list)))
673 (defun facemenu-add-new-face (face)
674 "Add FACE (a face) to the Face menu if `facemenu-listed-faces' says so.
675 This is called whenever you create a new face, and at other times."
676 (let* (name
677 symbol
678 menu docstring
679 (key (cdr (assoc face facemenu-keybindings)))
680 function menu-val)
681 (if (symbolp face)
682 (setq name (symbol-name face)
683 symbol face)
684 (setq name face
685 symbol (intern name)))
686 (setq menu 'facemenu-face-menu)
687 (setq docstring
688 (format "Select face `%s' for subsequent insertion."
689 name))
690 (cond ((facemenu-iterate ; check if equivalent face is already in the menu
691 (lambda (m) (and (listp m)
692 (symbolp (car m))
693 ;; Avoid error in face-equal
694 ;; when a non-face is erroneously present.
695 (facep (car m))
696 (face-equal (car m) symbol)))
697 (cdr (symbol-function menu))))
698 ;; Faces with a keyboard equivalent. These go at the front.
699 (key
700 (setq function (intern (concat "facemenu-set-" name)))
701 (fset function
702 `(lambda ()
703 ,docstring
704 (interactive)
705 (facemenu-set-face
706 (quote ,symbol)
707 (if (and mark-active (not current-prefix-arg))
708 (region-beginning))
709 (if (and mark-active (not current-prefix-arg))
710 (region-end)))))
711 (define-key 'facemenu-keymap key (cons name function))
712 (define-key menu key (cons name function)))
713 ;; Faces with no keyboard equivalent. Figure out where to put it:
714 ((or (eq t facemenu-listed-faces)
715 (memq symbol facemenu-listed-faces))
716 (setq key (vector symbol)
717 function 'facemenu-set-face-from-menu
718 menu-val (symbol-function menu))
719 (if (and facemenu-new-faces-at-end
720 (> (length menu-val) 3))
721 (define-key-after menu-val key (cons name function)
722 (car (nth (- (length menu-val) 3) menu-val)))
723 (define-key menu key (cons name function))))))
724 nil) ; Return nil for facemenu-iterate
726 (defun facemenu-add-new-color (color menu)
727 "Add COLOR (a color name string) to the appropriate Face menu.
728 MENU should be `facemenu-foreground-menu' or `facemenu-background-menu'.
729 Return the event type (a symbol) of the added menu entry.
731 This is called whenever you use a new color."
732 (let (symbol docstring)
733 (unless (color-defined-p color)
734 (error "Color `%s' undefined" color))
735 (cond ((eq menu 'facemenu-foreground-menu)
736 (setq docstring
737 (format "Select foreground color %s for subsequent insertion."
738 color)
739 symbol (intern (concat "fg:" color))))
740 ((eq menu 'facemenu-background-menu)
741 (setq docstring
742 (format "Select background color %s for subsequent insertion."
743 color)
744 symbol (intern (concat "bg:" color))))
745 (t (error "MENU should be `facemenu-foreground-menu' or `facemenu-background-menu'")))
746 (unless (facemenu-iterate ; Check if color is already in the menu.
747 (lambda (m) (and (listp m)
748 (eq (car m) symbol)))
749 (cdr (symbol-function menu)))
750 ;; Color is not in the menu. Figure out where to put it.
751 (let ((key (vector symbol))
752 (function 'facemenu-set-face-from-menu)
753 (menu-val (symbol-function menu)))
754 (if (and facemenu-new-faces-at-end
755 (> (length menu-val) 3))
756 (define-key-after menu-val key (cons color function)
757 (car (nth (- (length menu-val) 3) menu-val)))
758 (define-key menu key (cons color function)))))
759 symbol))
761 (defun facemenu-complete-face-list (&optional oldlist)
762 "Return list of all faces that look different.
763 Starts with given ALIST of faces, and adds elements only if they display
764 differently from any face already on the list.
765 The faces on ALIST will end up at the end of the returned list, in reverse
766 order."
767 (let ((list (nreverse (mapcar 'car oldlist))))
768 (facemenu-iterate
769 (lambda (new-face)
770 (if (not (memq new-face list))
771 (setq list (cons new-face list)))
772 nil)
773 (nreverse (face-list)))
774 list))
776 (defun facemenu-iterate (func list)
777 "Apply FUNC to each element of LIST until one returns non-nil.
778 Returns the non-nil value it found, or nil if all were nil."
779 (while (and list (not (funcall func (car list))))
780 (setq list (cdr list)))
781 (car list))
783 (facemenu-update)
785 (provide 'facemenu)
787 ;;; arch-tag: 85f6d02b-9085-420e-b651-0678f0e9c7eb
788 ;;; facemenu.el ends here