| blob | 97862afb6783986f2422659b1838006ca7524a51 |
1 ;;; facemenu.el --- create a face menu for interactively adding fonts to text
3 ;; Copyright (C) 1994-1996, 2001-2011 Free Software Foundation, Inc.
5 ;; Author: Boris Goldowsky <boris@gnu.org>
6 ;; Keywords: faces
7 ;; Package: emacs
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 3 of the License, or
14 ;; (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
24 ;;; Commentary:
26 ;; This file defines a menu of faces (bold, italic, etc) which allows you to
27 ;; set the face used for a region of the buffer. Some faces also have
28 ;; keybindings, which are shown in the menu.
29 ;;
30 ;; The menu also contains submenus for indentation and justification-changing
31 ;; commands.
33 ;;; Usage:
34 ;; Selecting a face from the menu or typing the keyboard equivalent will
35 ;; change the region to use that face. If you use transient-mark-mode and the
36 ;; region is not active, the face will be remembered and used for the next
37 ;; insertion. It will be forgotten if you move point or make other
38 ;; modifications before inserting or typing anything.
39 ;;
40 ;; Faces can be selected from the keyboard as well.
41 ;; The standard keybindings are M-o (or ESC o) + letter:
42 ;; M-o i = "set italic", M-o b = "set bold", etc.
44 ;;; Customization:
45 ;; An alternative set of keybindings that may be easier to type can be set up
46 ;; using "Alt" or "Hyper" keys. This requires that you either have or create
47 ;; an Alt or Hyper key on your keyboard. On my keyboard, there is a key
48 ;; labeled "Alt", but to make it act as an Alt key I have to put this command
49 ;; into my .xinitrc:
50 ;; xmodmap -e "add Mod3 = Alt_L"
51 ;; Or, I can make it into a Hyper key with this:
52 ;; xmodmap -e "keysym Alt_L = Hyper_L" -e "add Mod2 = Hyper_L"
53 ;; Check with local X-perts for how to do it on your system.
54 ;; Then you can define your keybindings with code like this in your .emacs:
55 ;; (setq facemenu-keybindings
56 ;; '((default . [?\H-d])
57 ;; (bold . [?\H-b])
58 ;; (italic . [?\H-i])
59 ;; (bold-italic . [?\H-l])
60 ;; (underline . [?\H-u])))
61 ;; (facemenu-update)
62 ;; (setq facemenu-keymap global-map)
63 ;; (define-key global-map [?\H-c] 'facemenu-set-foreground) ; set fg color
64 ;; (define-key global-map [?\H-C] 'facemenu-set-background) ; set bg color
65 ;;
66 ;; The order of the faces that appear in the menu and their keybindings can be
67 ;; controlled by setting the variables `facemenu-keybindings' and
68 ;; `facemenu-new-faces-at-end'. List faces that you want to use in documents
69 ;; in `facemenu-listed-faces'.
71 ;;; Known Problems:
72 ;; Bold and Italic do not combine to create bold-italic if you select them
73 ;; both, although most other combinations (eg bold + underline + some color)
74 ;; do the intuitive thing.
75 ;;
76 ;; There is at present no way to display what the faces look like in
77 ;; the menu itself.
78 ;;
79 ;; `list-faces-display' shows the faces in a different order than
80 ;; this menu, which could be confusing. I do /not/ sort the list
81 ;; alphabetically, because I like the default order: it puts the most
82 ;; basic, common fonts first.
83 ;;
84 ;; Please send me any other problems, comments or ideas.
86 ;;; Code:
92 ;; Global bindings:
97 "Create a face menu for interactively adding fonts to text."
108 "Alist of interesting faces and keybindings.
109 Each element is itself a list: the car is the name of the face,
110 the next element is the key to use as a keyboard equivalent of the menu item;
111 the binding is made in `facemenu-keymap'.
113 The faces specifically mentioned in this list are put at the top of
114 the menu, in the order specified. All other faces which are defined
115 in `facemenu-listed-faces' are listed after them, but get no
116 keyboard equivalents.
118 If you change this variable after loading facemenu.el, you will need to call
119 `facemenu-update' to make it take effect."
124 "Where in the menu to insert newly-created faces.
125 This should be nil to put them at the top of the menu, or t to put them
140 "List of faces to include in the Face menu.
141 Each element should be a symbol, the name of a face.
143 added to the Face menu, and need not be in this list.
145 This value takes effect when you load facemenu.el. If the
146 list includes symbols which are not defined as faces, they
147 are ignored; however, subsequently defining or creating
148 those faces adds them to the menu then. You can call
149 `facemenu-update' to recalculate the menu contents, such as
150 if you change the value of this variable,
152 If this variable is t, all faces that you apply to text
153 using the face menu commands (even by name), and all faces
154 that you define or create, are added to the menu. You may
155 find it useful to set this variable to t temporarily while
156 you define some faces, so that they will be added. However,
157 if the value is no longer t and you call `facemenu-update',
158 it will remove any faces not explicitly in the list."
168 map)
176 map)
184 map)
189 ;;; Condition for enabling menu items that set faces.
191 ;; Enable the facemenu if facemenu-add-face-function is defined
192 ;; (e.g. in Tex-mode and SGML mode), or if font-lock is off.
194 facemenu-add-face-function))
206 map)
217 map)
231 map)
235 ;; This is split up to avoid an overlong line in loaddefs.el.
241 (define-key map [df] (cons (purecopy "Display Faces") 'list-faces-display))
242 (define-key map [dp] (cons (purecopy "Describe Properties")
243 'describe-text-properties))
244 (define-key map [ra] (cons (purecopy "Remove Text Properties")
245 'facemenu-remove-all))
246 (define-key map [rm] (cons (purecopy "Remove Face Properties")
247 'facemenu-remove-face-props))
248 (define-key map [s1] (list (purecopy "--"))))
249 (let ((map facemenu-menu))
250 (define-key map [in] (cons (purecopy "Indentation")
251 'facemenu-indentation-menu))
252 (define-key map [ju] (cons (purecopy "Justification")
253 'facemenu-justification-menu))
254 (define-key map [s2] (list (purecopy "--")))
255 (define-key map [sp] (cons (purecopy "Special Properties")
256 'facemenu-special-menu))
257 (define-key map [bg] (cons (purecopy "Background Color")
258 'facemenu-background-menu))
259 (define-key map [fg] (cons (purecopy "Foreground Color")
260 'facemenu-foreground-menu))
261 (define-key map [fc] (cons (purecopy "Face")
262 'facemenu-face-menu)))
263 (defalias 'facemenu-menu facemenu-menu)
265 (defvar facemenu-keymap
266 (let ((map (make-sparse-keymap "Set face")))
267 (define-key map "o" (cons (purecopy "Other...") 'facemenu-set-face))
268 (define-key map "\M-o" 'font-lock-fontify-block)
269 map)
270 "Keymap for face-changing commands.
271 `Facemenu-update' fills in the keymap according to the bindings
272 requested in `facemenu-keybindings'.")
273 (defalias 'facemenu-keymap facemenu-keymap)
276 (defcustom facemenu-add-face-function nil
277 "Function called at beginning of text to change or nil.
278 This function is passed the FACE to set and END of text to change, and must
279 return a string which is inserted. It may set `facemenu-end-add-face'."
280 :type '(choice (const :tag "None" nil)
281 function)
282 :group 'facemenu)
284 (defcustom facemenu-end-add-face nil
285 "String to insert or function called at end of text to change or nil.
286 This function is passed the FACE to set, and must return a string which is
287 inserted."
288 :type '(choice (const :tag "None" nil)
289 string
290 function)
291 :group 'facemenu)
293 (defcustom facemenu-remove-face-function nil
294 "When non-nil, this is a function called to remove faces.
295 This function is passed the START and END of text to change.
296 May also be t meaning to use `facemenu-add-face-function'."
297 :type '(choice (const :tag "None" nil)
298 (const :tag "Use add-face" t)
299 function)
300 :group 'facemenu)
302 ;;; Internal Variables
304 (defvar facemenu-color-alist nil
305 "Alist of colors, used for completion.
306 If this is nil, then the value of (defined-colors) is used.")
308 (defun facemenu-update ()
310 You can call this to update things if you change any of the menu configuration
311 variables."
312 (interactive)
314 ;; Add each defined face to the menu.
315 (facemenu-iterate 'facemenu-add-new-face
316 (facemenu-complete-face-list facemenu-keybindings)))
318 (defun facemenu-set-face (face &optional start end)
319 "Apply FACE to the region or next character typed.
321 If the region is active (normally true except in Transient
322 Mark mode) and nonempty, and there is no prefix argument,
323 this command applies FACE to the region. Otherwise, it applies FACE
324 to the faces to use for the next character
325 inserted. (Moving point or switching buffers before typing
326 a character to insert cancels the specification.)
329 the list of faces to be used. For any other value of FACE,
331 of faces to be used, and removing any faces further
332 along in the list that would be completely overridden by
333 preceding faces (including FACE).
335 This command can also add FACE to the menu of faces,
336 if `facemenu-listed-faces' says to do that."
337 (interactive (list (progn
338 (barf-if-buffer-read-only)
339 (read-face-name "Use face"))
340 (if (and mark-active (not current-prefix-arg))
341 (region-beginning))
342 (if (and mark-active (not current-prefix-arg))
343 (region-end))))
344 (facemenu-add-new-face face)
345 (facemenu-add-face face start end))
347 (defun facemenu-set-foreground (color &optional start end)
348 "Set the foreground COLOR of the region or next character typed.
349 This command reads the color in the minibuffer.
351 If the region is active (normally true except in Transient Mark mode)
352 and there is no prefix argument, this command sets the region to the
353 requested face.
355 Otherwise, this command specifies the face for the next character
356 inserted. Moving point or switching buffers before
357 typing a character to insert cancels the specification."
358 (interactive (list (progn
359 (barf-if-buffer-read-only)
360 (read-color "Foreground color: "))
361 (if (and mark-active (not current-prefix-arg))
362 (region-beginning))
363 (if (and mark-active (not current-prefix-arg))
364 (region-end))))
365 (facemenu-set-face-from-menu
366 (facemenu-add-new-color color 'facemenu-foreground-menu)
367 start end))
369 (defun facemenu-set-background (color &optional start end)
370 "Set the background COLOR of the region or next character typed.
371 This command reads the color in the minibuffer.
373 If the region is active (normally true except in Transient Mark mode)
374 and there is no prefix argument, this command sets the region to the
375 requested face.
377 Otherwise, this command specifies the face for the next character
378 inserted. Moving point or switching buffers before
379 typing a character to insert cancels the specification."
380 (interactive (list (progn
381 (barf-if-buffer-read-only)
382 (read-color "Background color: "))
383 (if (and mark-active (not current-prefix-arg))
384 (region-beginning))
385 (if (and mark-active (not current-prefix-arg))
386 (region-end))))
387 (facemenu-set-face-from-menu
388 (facemenu-add-new-color color 'facemenu-background-menu)
389 start end))
391 (defun facemenu-set-face-from-menu (face start end)
392 "Set the FACE of the region or next character typed.
393 This function is designed to be called from a menu; FACE is determined
394 using the event type of the menu entry. If FACE is a symbol whose
396 foreground or background to the color specified by the rest of the
397 symbol's name. Any other symbol is considered the name of a face.
399 If the region is active (normally true except in Transient Mark mode)
400 and there is no prefix argument, this command sets the region to the
401 requested face.
403 Otherwise, this command specifies the face for the next character
404 inserted. Moving point or switching buffers before typing a character
405 to insert cancels the specification."
406 (interactive (list last-command-event
407 (if (and mark-active (not current-prefix-arg))
408 (region-beginning))
409 (if (and mark-active (not current-prefix-arg))
410 (region-end))))
411 (barf-if-buffer-read-only)
412 (facemenu-add-face
413 (let ((fn (symbol-name face)))
415 (list (list (if (string= (match-string 1 fn) "f")
416 :foreground
417 :background)
418 (match-string 2 fn)))
419 face))
420 start end))
422 (defun facemenu-set-invisible (start end)
423 "Make the region invisible.
424 This sets the `invisible' text property; it can be undone with
425 `facemenu-remove-special'."
426 (interactive "r")
427 (add-text-properties start end '(invisible t)))
429 (defun facemenu-set-intangible (start end)
430 "Make the region intangible: disallow moving into it.
431 This sets the `intangible' text property; it can be undone with
432 `facemenu-remove-special'."
433 (interactive "r")
434 (add-text-properties start end '(intangible t)))
436 (defun facemenu-set-read-only (start end)
437 "Make the region unmodifiable.
438 This sets the `read-only' text property; it can be undone with
439 `facemenu-remove-special'."
440 (interactive "r")
441 (add-text-properties start end '(read-only t)))
443 (defun facemenu-remove-face-props (start end)
444 "Remove `face' and `mouse-face' text properties."
445 (interactive "*r") ; error if buffer is read-only despite the next line.
446 (let ((inhibit-read-only t))
447 (remove-text-properties
448 start end '(face nil mouse-face nil))))
450 (defun facemenu-remove-all (start end)
451 "Remove all text properties from the region."
452 (interactive "*r") ; error if buffer is read-only despite the next line.
453 (let ((inhibit-read-only t))
454 (set-text-properties start end nil)))
456 (defun facemenu-remove-special (start end)
458 These special properties include `invisible', `intangible' and `read-only'."
459 (interactive "*r") ; error if buffer is read-only despite the next line.
460 (let ((inhibit-read-only t))
461 (remove-text-properties
462 start end '(invisible nil intangible nil read-only nil))))
463 \f
464 (defalias 'facemenu-read-color 'read-color)
466 (defcustom list-colors-sort nil
467 "Color sort order for `list-colors-display'.
468 `nil' means default implementation-dependent order (defined in `x-colors').
469 `name' sorts by color name.
470 `rgb' sorts by red, green, blue components.
471 `(rgb-dist . COLOR)' sorts by the RGB distance to the specified color.
472 `hsv' sorts by hue, saturation, value.
473 `(hsv-dist . COLOR)' sorts by the HSV distance to the specified color
474 and excludes grayscale colors."
475 :type '(choice (const :tag "Unsorted" nil)
476 (const :tag "Color Name" name)
477 (const :tag "Red-Green-Blue" rgb)
478 (cons :tag "Distance on RGB cube"
479 (const :tag "Distance from Color" rgb-dist)
480 (color :tag "Source Color Name"))
481 (const :tag "Hue-Saturation-Value" hsv)
482 (cons :tag "Distance on HSV cylinder"
483 (const :tag "Distance from Color" hsv-dist)
484 (color :tag "Source Color Name")))
485 :group 'facemenu
486 :version "24.1")
488 (defun list-colors-sort-key (color)
489 "Return a list of keys for sorting colors depending on `list-colors-sort'.
490 COLOR is the name of the color. When return value is nil,
491 filter out the color from the output."
492 (require 'color)
493 (cond
494 ((null list-colors-sort) color)
495 ((eq list-colors-sort 'name)
496 (downcase color))
497 ((eq list-colors-sort 'rgb)
498 (color-values color))
499 ((eq (car-safe list-colors-sort) 'rgb-dist)
500 (color-distance color (cdr list-colors-sort)))
501 ((eq list-colors-sort 'hsv)
502 (apply 'color-rgb-to-hsv (color-name-to-rgb color)))
503 ((eq (car-safe list-colors-sort) 'hsv-dist)
504 (let* ((c-rgb (color-name-to-rgb color))
505 (c-hsv (apply 'color-rgb-to-hsv c-rgb))
506 (o-hsv (apply 'color-rgb-to-hsv
507 (color-name-to-rgb (cdr list-colors-sort)))))
508 (unless (and (eq (nth 0 c-rgb) (nth 1 c-rgb)) ; exclude grayscale
509 (eq (nth 1 c-rgb) (nth 2 c-rgb)))
510 ;; 3D Euclidean distance (sqrt is not needed for sorting)
511 (+ (expt (- 180 (abs (- 180 (abs (- (nth 0 c-hsv) ; wrap hue
512 (nth 0 o-hsv)))))) 2)
513 (expt (- (nth 1 c-hsv) (nth 1 o-hsv)) 2)
514 (expt (- (nth 2 c-hsv) (nth 2 o-hsv)) 2)))))))
516 (defun list-colors-display (&optional list buffer-name callback)
517 "Display names of defined colors, and show what they look like.
518 If the optional argument LIST is non-nil, it should be a list of
519 colors to display. Otherwise, this command computes a list of
520 colors that the current display can handle.
522 If the optional argument BUFFER-NAME is nil, it defaults to
523 *Colors*.
525 If the optional argument CALLBACK is non-nil, it should be a
526 function to call each time the user types RET or clicks on a
527 color. The function should accept a single argument, the color
528 name.
530 You can change the color sort order by customizing `list-colors-sort'."
531 (interactive)
532 (when (and (null list) (> (display-color-cells) 0))
533 (setq list (list-colors-duplicates (defined-colors)))
534 (when list-colors-sort
535 ;; Schwartzian transform with `(color key1 key2 key3 ...)'.
536 (setq list (mapcar
537 'car
538 (sort (delq nil (mapcar
539 (lambda (c)
540 (let ((key (list-colors-sort-key
541 (car c))))
542 (when key
543 (cons c (if (consp key) key
544 (list key))))))
545 list))
546 (lambda (a b)
547 (let* ((a-keys (cdr a))
548 (b-keys (cdr b))
549 (a-key (car a-keys))
550 (b-key (car b-keys)))
551 ;; Skip common keys at the beginning of key lists.
552 (while (and a-key b-key (equal a-key b-key))
553 (setq a-keys (cdr a-keys) a-key (car a-keys)
554 b-keys (cdr b-keys) b-key (car b-keys)))
555 (cond
556 ((and (numberp a-key) (numberp b-key))
557 (< a-key b-key))
558 ((and (stringp a-key) (stringp b-key))
559 (string< a-key b-key)))))))))
560 (when (memq (display-visual-class) '(gray-scale pseudo-color direct-color))
561 ;; Don't show more than what the display can handle.
562 (let ((lc (nthcdr (1- (display-color-cells)) list)))
563 (if lc
564 (setcdr lc nil)))))
565 (unless buffer-name
566 (setq buffer-name "*Colors*"))
567 (with-help-window buffer-name
568 (with-current-buffer standard-output
569 (erase-buffer)
570 (setq truncate-lines t)))
571 (let ((buf (get-buffer buffer-name))
572 (inhibit-read-only t))
573 ;; Display buffer before generating content, to allow
574 ;; `list-colors-print' to get the right window-width.
575 (with-selected-window (or (get-buffer-window buf t) (selected-window))
576 (with-current-buffer buf
577 (list-colors-print list callback)
578 (set-buffer-modified-p nil)))
579 (when callback
580 (pop-to-buffer buf)
581 (message "Click on a color to select it."))))
583 (defun list-colors-print (list &optional callback)
584 (let ((callback-fn
585 (if callback
586 `(lambda (button)
587 (funcall ,callback (button-get button 'color-name))))))
588 (dolist (color list)
589 (if (consp color)
590 (if (cdr color)
591 (setq color (sort color (lambda (a b)
592 (string< (downcase a)
593 (downcase b))))))
594 (setq color (list color)))
595 (let* ((opoint (point))
596 (color-values (color-values (car color)))
597 (light-p (>= (apply 'max color-values)
598 (* (car (color-values "white")) .5)))
599 (max-len (max (- (window-width) 33) 20)))
600 (insert (car color))
601 (indent-to 22)
602 (put-text-property opoint (point) 'face `(:background ,(car color)))
603 (put-text-property
604 (prog1 (point)
605 (insert " ")
606 (if (cdr color)
607 ;; Insert as many color names as possible, fitting max-len.
608 (let ((names (list (car color)))
609 (others (cdr color))
610 (len (length (car color)))
611 newlen)
612 (while (and others
613 (< (setq newlen (+ len 2 (length (car others))))
614 max-len))
615 (setq len newlen)
616 (push (pop others) names))
617 (insert (mapconcat 'identity (nreverse names) ", ")))
618 (insert (car color))))
619 (point)
620 'face (list :foreground (car color)))
621 (indent-to (max (- (window-width) 8) 44))
622 (insert (propertize
623 (apply 'format "#%02x%02x%02x"
624 (mapcar (lambda (c) (lsh c -8))
625 color-values))
626 'mouse-face 'highlight
627 'help-echo
628 (let ((hsv (apply 'color-rgb-to-hsv
629 (color-name-to-rgb (car color)))))
630 (format "H:%d S:%d V:%d"
631 (nth 0 hsv) (nth 1 hsv) (nth 2 hsv)))))
632 (when callback
633 (make-text-button
634 opoint (point)
635 'follow-link t
636 'mouse-face (list :background (car color)
637 :foreground (if light-p "black" "white"))
638 'color-name (car color)
639 'action callback-fn)))
641 (goto-char (point-min))))
644 (defun list-colors-duplicates (&optional list)
645 "Return a list of colors with grouped duplicate colors.
646 If a color has no duplicates, then the element of the returned list
647 has the form '(COLOR-NAME). The element of the returned list with
648 duplicate colors has the form '(COLOR-NAME DUPLICATE-COLOR-NAME ...).
649 This function uses the predicate `facemenu-color-equal' to compare
650 color names. If the optional argument LIST is non-nil, it should
651 be a list of colors to display. Otherwise, this function uses
652 a list of colors that the current display can handle."
653 (let* ((list (mapcar 'list (or list (defined-colors))))
654 (l list))
655 (while (cdr l)
656 (if (and (facemenu-color-equal (car (car l)) (car (car (cdr l))))
657 (not (if (fboundp 'w32-default-color-map)
658 (not (assoc (car (car l)) (w32-default-color-map))))))
659 (progn
660 (setcdr (car l) (cons (car (car (cdr l))) (cdr (car l))))
661 (setcdr l (cdr (cdr l))))
662 (setq l (cdr l))))
663 list))
665 (defun facemenu-color-equal (a b)
666 "Return t if colors A and B are the same color.
667 A and B should be strings naming colors.
668 This function queries the display system to find out what the color
669 names mean. It returns nil if the colors differ or if it can't
670 determine the correct answer."
671 (cond ((equal a b) t)
672 ((equal (color-values a) (color-values b)))))
675 (defvar facemenu-self-insert-data nil)
677 (defun facemenu-post-self-insert-function ()
678 (when (and (car facemenu-self-insert-data)
679 (eq last-command (cdr facemenu-self-insert-data)))
680 (put-text-property (1- (point)) (point)
681 'face (car facemenu-self-insert-data))
682 (setq facemenu-self-insert-data nil))
683 (remove-hook 'post-self-insert-hook 'facemenu-post-self-insert-function))
685 (defun facemenu-set-self-insert-face (face)
686 "Arrange for the next self-inserted char to have face `face'."
687 (setq facemenu-self-insert-data (cons face this-command))
688 (add-hook 'post-self-insert-hook 'facemenu-post-self-insert-function))
690 (defun facemenu-add-face (face &optional start end)
691 "Add FACE to text between START and END.
692 If START is nil or START to END is empty, add FACE to next typed character
693 instead. For each section of that region that has a different face property,
694 FACE will be consed onto it, and other faces that are completely hidden by
695 that will be removed from the list.
696 If `facemenu-add-face-function' and maybe `facemenu-end-add-face' are non-nil,
697 they are used to set the face information.
699 As a special case, if FACE is `default', then the region is left with NO face
700 text property. Otherwise, selecting the default face would not have any
701 effect. See `facemenu-remove-face-function'."
703 (cond
704 ((and (eq face 'default)
705 (not (eq facemenu-remove-face-function t)))
706 (if facemenu-remove-face-function
707 (funcall facemenu-remove-face-function start end)
708 (if (and start (< start end))
709 (remove-text-properties start end '(face default))
710 (facemenu-set-self-insert-face 'default))))
711 (facemenu-add-face-function
712 (save-excursion
713 (if end (goto-char end))
714 (save-excursion
715 (if start (goto-char start))
716 (insert-before-markers
717 (funcall facemenu-add-face-function face end)))
718 (if facemenu-end-add-face
719 (insert (if (stringp facemenu-end-add-face)
720 facemenu-end-add-face
721 (funcall facemenu-end-add-face face))))))
722 ((and start (< start end))
723 (let ((part-start start) part-end)
724 (while (not (= part-start end))
725 (setq part-end (next-single-property-change part-start 'face
726 nil end))
727 (let ((prev (get-text-property part-start 'face)))
728 (put-text-property part-start part-end 'face
729 (if (null prev)
730 face
731 (facemenu-active-faces
732 (cons face
733 (if (listp prev)
734 prev
735 (list prev)))
736 ;; Specify the selected frame
737 ;; because nil would mean to use
738 ;; the new-frame default settings,
739 ;; and those are usually nil.
740 (selected-frame)))))
741 (setq part-start part-end))))
742 (t
743 (facemenu-set-self-insert-face
744 (if (eq last-command (cdr facemenu-self-insert-data))
745 (cons face (if (listp (car facemenu-self-insert-data))
746 (car facemenu-self-insert-data)
747 (list (car facemenu-self-insert-data))))
748 face))))
749 (unless (facemenu-enable-faces-p)
750 (message "Font-lock mode will override any faces you set in this buffer")))
752 (defun facemenu-active-faces (face-list &optional frame)
753 "Return from FACE-LIST those faces that would be used for display.
754 This means each face attribute is not specified in a face earlier in FACE-LIST
755 and such a face is therefore active when used to display text.
756 If the optional argument FRAME is given, use the faces in that frame; otherwise
757 use the selected frame. If t, then the global, non-frame faces are used."
758 (let* ((mask-atts (copy-sequence
759 (if (consp (car face-list))
760 (face-attributes-as-vector (car face-list))
761 (or (internal-lisp-face-p (car face-list) frame)
762 (check-face (car face-list))))))
763 (active-list (list (car face-list)))
764 (face-list (cdr face-list))
765 (mask-len (length mask-atts)))
766 (while face-list
767 (if (let ((face-atts
768 (if (consp (car face-list))
769 (face-attributes-as-vector (car face-list))
770 (or (internal-lisp-face-p (car face-list) frame)
771 (check-face (car face-list)))))
772 (i mask-len)
773 (useful nil))
774 (while (>= (setq i (1- i)) 0)
775 (and (not (memq (aref face-atts i) '(nil unspecified)))
776 (memq (aref mask-atts i) '(nil unspecified))
777 (aset mask-atts i (setq useful t))))
778 useful)
779 (setq active-list (cons (car face-list) active-list)))
780 (setq face-list (cdr face-list)))
781 (nreverse active-list)))
783 (defun facemenu-add-new-face (face)
784 "Add FACE (a face) to the Face menu if `facemenu-listed-faces' says so.
785 This is called whenever you create a new face, and at other times."
786 (let* (name
787 symbol
788 menu docstring
789 (key (cdr (assoc face facemenu-keybindings)))
790 function menu-val)
791 (if (symbolp face)
792 (setq name (symbol-name face)
793 symbol face)
794 (setq name face
795 symbol (intern name)))
796 (setq menu 'facemenu-face-menu)
797 (setq docstring
798 (purecopy (format "Select face `%s' for subsequent insertion.
799 If the mark is active and there is no prefix argument,
800 apply face `%s' to the region instead.
801 This command was defined by `facemenu-add-new-face'."
802 name name)))
803 (cond ((facemenu-iterate ; check if equivalent face is already in the menu
804 (lambda (m) (and (listp m)
805 (symbolp (car m))
806 ;; Avoid error in face-equal
807 ;; when a non-face is erroneously present.
808 (facep (car m))
809 (face-equal (car m) symbol)))
810 (cdr (symbol-function menu))))
811 ;; Faces with a keyboard equivalent. These go at the front.
812 (key
813 (setq function (intern (concat "facemenu-set-" name)))
814 (fset function
815 `(lambda ()
816 ,docstring
817 (interactive)
818 (facemenu-set-face
819 (quote ,symbol)
820 (if (and mark-active (not current-prefix-arg))
821 (region-beginning))
822 (if (and mark-active (not current-prefix-arg))
823 (region-end)))))
824 (define-key 'facemenu-keymap key (cons name function))
825 (define-key menu key (cons name function)))
826 ;; Faces with no keyboard equivalent. Figure out where to put it:
827 ((or (eq t facemenu-listed-faces)
828 (memq symbol facemenu-listed-faces))
829 (setq key (vector symbol)
830 function 'facemenu-set-face-from-menu
831 menu-val (symbol-function menu))
832 (if (and facemenu-new-faces-at-end
833 (> (length menu-val) 3))
834 (define-key-after menu-val key (cons name function)
835 (car (nth (- (length menu-val) 3) menu-val)))
836 (define-key menu key (cons name function))))))
837 nil) ; Return nil for facemenu-iterate
839 (defun facemenu-add-new-color (color menu)
840 "Add COLOR (a color name string) to the appropriate Face menu.
841 MENU should be `facemenu-foreground-menu' or `facemenu-background-menu'.
842 Return the event type (a symbol) of the added menu entry.
844 This is called whenever you use a new color."
845 (let (symbol docstring)
846 (unless (color-defined-p color)
847 (error "Color `%s' undefined" color))
848 (cond ((eq menu 'facemenu-foreground-menu)
849 (setq docstring
850 (format "Select foreground color %s for subsequent insertion."
851 color)
852 symbol (intern (concat "fg:" color))))
853 ((eq menu 'facemenu-background-menu)
854 (setq docstring
855 (format "Select background color %s for subsequent insertion."
856 color)
857 symbol (intern (concat "bg:" color))))
858 (t (error "MENU should be `facemenu-foreground-menu' or `facemenu-background-menu'")))
859 (unless (facemenu-iterate ; Check if color is already in the menu.
860 (lambda (m) (and (listp m)
861 (eq (car m) symbol)))
862 (cdr (symbol-function menu)))
863 ;; Color is not in the menu. Figure out where to put it.
864 (let ((key (vector symbol))
865 (function 'facemenu-set-face-from-menu)
866 (menu-val (symbol-function menu)))
867 (if (and facemenu-new-faces-at-end
868 (> (length menu-val) 3))
869 (define-key-after menu-val key (cons color function)
870 (car (nth (- (length menu-val) 3) menu-val)))
871 (define-key menu key (cons color function)))))
872 symbol))
874 (defun facemenu-complete-face-list (&optional oldlist)
875 "Return list of all faces that look different.
876 Starts with given ALIST of faces, and adds elements only if they display
877 differently from any face already on the list.
878 The faces on ALIST will end up at the end of the returned list, in reverse
879 order."
880 (let ((list (nreverse (mapcar 'car oldlist))))
881 (facemenu-iterate
882 (lambda (new-face)
883 (if (not (memq new-face list))
884 (setq list (cons new-face list)))
885 nil)
886 (nreverse (face-list)))
887 list))
889 (defun facemenu-iterate (func list)
890 "Apply FUNC to each element of LIST until one returns non-nil.
891 Returns the non-nil value it found, or nil if all were nil."
892 (while (and list (not (funcall func (car list))))
893 (setq list (cdr list)))
894 (car list))
896 (facemenu-update)
898 (provide 'facemenu)
900 ;;; facemenu.el ends here