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bfa6c260 | 1 | ;;; wid-edit.el --- Functions for creating and using widgets -*-byte-compile-dynamic: t;-*- |
d543e20b | 2 | ;; |
937382fa GM |
3 | ;; Copyright (C) 1996, 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
4 | ;; 2006, 2007, 2008 Free Software Foundation, Inc. | |
d543e20b PA |
5 | ;; |
6 | ;; Author: Per Abrahamsen <abraham@dina.kvl.dk> | |
a89a9d34 | 7 | ;; Maintainer: FSF |
d543e20b | 8 | ;; Keywords: extensions |
d543e20b | 9 | |
ef3f635f RS |
10 | ;; This file is part of GNU Emacs. |
11 | ||
eb3fa2cf | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
ef3f635f | 13 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
ef3f635f RS |
16 | |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
ef3f635f | 24 | |
7fdbdbea DL |
25 | ;;; Wishlist items (from widget.texi): |
26 | ||
27 | ;; * The `menu-choice' tag should be prettier, something like the | |
28 | ;; abbreviated menus in Open Look. | |
29 | ||
30 | ;; * Finish `:tab-order'. | |
31 | ||
32 | ;; * Make indentation work with glyphs and proportional fonts. | |
33 | ||
34 | ;; * Add commands to show overview of object and class hierarchies to | |
35 | ;; the browser. | |
36 | ||
37 | ;; * Find a way to disable mouse highlight for inactive widgets. | |
38 | ||
39 | ;; * Find a way to make glyphs look inactive. | |
40 | ||
41 | ;; * Add `key-binding' widget. | |
42 | ||
43 | ;; * Add `widget' widget for editing widget specifications. | |
44 | ||
45 | ;; * Find clean way to implement variable length list. See | |
46 | ;; `TeX-printer-list' for an explanation. | |
47 | ||
48 | ;; * `C-h' in `widget-prompt-value' should give type specific help. | |
49 | ||
50 | ;; * A mailto widget. [This should work OK as a url-link if with | |
51 | ;; browse-url-browser-function' set up appropriately.] | |
52 | ||
d543e20b PA |
53 | ;;; Commentary: |
54 | ;; | |
55 | ;; See `widget.el'. | |
56 | ||
57 | ;;; Code: | |
58 | ||
a5e6116d JB |
59 | (defvar widget) |
60 | ||
d543e20b | 61 | ;;; Compatibility. |
bfa6c260 | 62 | |
4084d128 RS |
63 | (defun widget-event-point (event) |
64 | "Character position of the end of event if that exists, or nil." | |
17030183 | 65 | (posn-point (event-end event))) |
4084d128 | 66 | |
bfa6c260 DL |
67 | (defun widget-button-release-event-p (event) |
68 | "Non-nil if EVENT is a mouse-button-release event object." | |
69 | (and (eventp event) | |
70 | (memq (event-basic-type event) '(mouse-1 mouse-2 mouse-3)) | |
71 | (or (memq 'click (event-modifiers event)) | |
72 | (memq 'drag (event-modifiers event))))) | |
d543e20b PA |
73 | |
74 | ;;; Customization. | |
75 | ||
76 | (defgroup widgets nil | |
77 | "Customization support for the Widget Library." | |
78 | :link '(custom-manual "(widget)Top") | |
62f44662 | 79 | :link '(emacs-library-link :tag "Lisp File" "widget.el") |
d543e20b PA |
80 | :prefix "widget-" |
81 | :group 'extensions | |
d543e20b PA |
82 | :group 'hypermedia) |
83 | ||
8697863a | 84 | (defgroup widget-documentation nil |
cb9026a3 | 85 | "Options controlling the display of documentation strings." |
8697863a PA |
86 | :group 'widgets) |
87 | ||
6aaedd12 PA |
88 | (defgroup widget-faces nil |
89 | "Faces used by the widget library." | |
90 | :group 'widgets | |
91 | :group 'faces) | |
92 | ||
0efefc52 | 93 | (defvar widget-documentation-face 'widget-documentation |
a89a9d34 | 94 | "Face used for documentation strings in widgets. |
0b296dac RS |
95 | This exists as a variable so it can be set locally in certain buffers.") |
96 | ||
0efefc52 MB |
97 | (defface widget-documentation '((((class color) |
98 | (background dark)) | |
99 | (:foreground "lime green")) | |
100 | (((class color) | |
101 | (background light)) | |
102 | (:foreground "dark green")) | |
103 | (t nil)) | |
8697863a PA |
104 | "Face used for documentation text." |
105 | :group 'widget-documentation | |
106 | :group 'widget-faces) | |
0efefc52 MB |
107 | ;; backward compatibility alias |
108 | (put 'widget-documentation-face 'face-alias 'widget-documentation) | |
8697863a | 109 | |
0efefc52 | 110 | (defvar widget-button-face 'widget-button |
a89a9d34 | 111 | "Face used for buttons in widgets. |
2f477381 RS |
112 | This exists as a variable so it can be set locally in certain buffers.") |
113 | ||
0efefc52 | 114 | (defface widget-button '((t (:weight bold))) |
d543e20b | 115 | "Face used for widget buttons." |
6aaedd12 | 116 | :group 'widget-faces) |
0efefc52 MB |
117 | ;; backward compatibility alias |
118 | (put 'widget-button-face 'face-alias 'widget-button) | |
d543e20b PA |
119 | |
120 | (defcustom widget-mouse-face 'highlight | |
121 | "Face used for widget buttons when the mouse is above them." | |
122 | :type 'face | |
6aaedd12 | 123 | :group 'widget-faces) |
d543e20b | 124 | |
2670cf80 EZ |
125 | ;; TTY gets special definitions here and in the next defface, because |
126 | ;; the gray colors defined for other displays cause black text on a black | |
127 | ;; background, at least on light-background TTYs. | |
0efefc52 MB |
128 | (defface widget-field '((((type tty)) |
129 | :background "yellow3" | |
130 | :foreground "black") | |
131 | (((class grayscale color) | |
132 | (background light)) | |
133 | :background "gray85") | |
134 | (((class grayscale color) | |
135 | (background dark)) | |
136 | :background "dim gray") | |
137 | (t | |
138 | :slant italic)) | |
d543e20b | 139 | "Face used for editable fields." |
6aaedd12 | 140 | :group 'widget-faces) |
0efefc52 MB |
141 | ;; backward-compatibility alias |
142 | (put 'widget-field-face 'face-alias 'widget-field) | |
143 | ||
144 | (defface widget-single-line-field '((((type tty)) | |
145 | :background "green3" | |
146 | :foreground "black") | |
147 | (((class grayscale color) | |
148 | (background light)) | |
149 | :background "gray85") | |
150 | (((class grayscale color) | |
151 | (background dark)) | |
152 | :background "dim gray") | |
153 | (t | |
154 | :slant italic)) | |
c953515e PA |
155 | "Face used for editable fields spanning only a single line." |
156 | :group 'widget-faces) | |
0efefc52 MB |
157 | ;; backward-compatibility alias |
158 | (put 'widget-single-line-field-face 'face-alias 'widget-single-line-field) | |
c953515e | 159 | |
33eae9c0 RS |
160 | ;;; This causes display-table to be loaded, and not usefully. |
161 | ;;;(defvar widget-single-line-display-table | |
162 | ;;; (let ((table (make-display-table))) | |
163 | ;;; (aset table 9 "^I") | |
164 | ;;; (aset table 10 "^J") | |
165 | ;;; table) | |
166 | ;;; "Display table used for single-line editable fields.") | |
167 | ||
168 | ;;;(when (fboundp 'set-face-display-table) | |
169 | ;;; (set-face-display-table 'widget-single-line-field-face | |
170 | ;;; widget-single-line-display-table)) | |
c953515e | 171 | |
d543e20b PA |
172 | ;;; Utility functions. |
173 | ;; | |
174 | ;; These are not really widget specific. | |
175 | ||
d543e20b | 176 | (defun widget-princ-to-string (object) |
bfa6c260 DL |
177 | "Return string representation of OBJECT, any Lisp object. |
178 | No quoting characters are used; no delimiters are printed around | |
179 | the contents of strings." | |
180 | (with-output-to-string | |
181 | (princ object))) | |
d543e20b PA |
182 | |
183 | (defun widget-clear-undo () | |
184 | "Clear all undo information." | |
185 | (buffer-disable-undo (current-buffer)) | |
186 | (buffer-enable-undo)) | |
187 | ||
a3c88c59 PA |
188 | (defcustom widget-menu-max-size 40 |
189 | "Largest number of items allowed in a popup-menu. | |
190 | Larger menus are read through the minibuffer." | |
191 | :group 'widgets | |
192 | :type 'integer) | |
193 | ||
703c3a11 KH |
194 | (defcustom widget-menu-max-shortcuts 40 |
195 | "Largest number of items for which it works to choose one with a character. | |
196 | For a larger number of items, the minibuffer is used." | |
197 | :group 'widgets | |
198 | :type 'integer) | |
199 | ||
200 | (defcustom widget-menu-minibuffer-flag nil | |
0b296dac RS |
201 | "*Control how to ask for a choice from the keyboard. |
202 | Non-nil means use the minibuffer; | |
203 | nil means read a single character." | |
204 | :group 'widgets | |
205 | :type 'boolean) | |
206 | ||
d543e20b PA |
207 | (defun widget-choose (title items &optional event) |
208 | "Choose an item from a list. | |
209 | ||
210 | First argument TITLE is the name of the list. | |
77339a6e | 211 | Second argument ITEMS is a list whose members are either |
6d528fc5 PA |
212 | (NAME . VALUE), to indicate selectable items, or just strings to |
213 | indicate unselectable items. | |
d543e20b PA |
214 | Optional third argument EVENT is an input event. |
215 | ||
216 | The user is asked to choose between each NAME from the items alist, | |
217 | and the VALUE of the chosen element will be returned. If EVENT is a | |
218 | mouse event, and the number of elements in items is less than | |
219 | `widget-menu-max-size', a popup menu will be used, otherwise the | |
220 | minibuffer." | |
221 | (cond ((and (< (length items) widget-menu-max-size) | |
fb55ff10 | 222 | event (display-popup-menus-p)) |
7fdbdbea | 223 | ;; Mouse click. |
d543e20b PA |
224 | (x-popup-menu event |
225 | (list title (cons "" items)))) | |
703c3a11 KH |
226 | ((or widget-menu-minibuffer-flag |
227 | (> (length items) widget-menu-max-shortcuts)) | |
0b296dac | 228 | ;; Read the choice of name from the minibuffer. |
e5dfabb4 | 229 | (setq items (widget-remove-if 'stringp items)) |
d543e20b PA |
230 | (let ((val (completing-read (concat title ": ") items nil t))) |
231 | (if (stringp val) | |
232 | (let ((try (try-completion val items))) | |
233 | (when (stringp try) | |
234 | (setq val try)) | |
bfa6c260 | 235 | (cdr (assoc val items)))))) |
0b296dac RS |
236 | (t |
237 | ;; Construct a menu of the choices | |
238 | ;; and then use it for prompting for a single character. | |
7fdbdbea DL |
239 | (let* ((overriding-terminal-local-map (make-sparse-keymap)) |
240 | (next-digit ?0) | |
241 | map choice some-choice-enabled value) | |
0b296dac RS |
242 | ;; Define SPC as a prefix char to get to this menu. |
243 | (define-key overriding-terminal-local-map " " | |
244 | (setq map (make-sparse-keymap title))) | |
7c0a9c8f | 245 | (with-current-buffer (get-buffer-create " widget-choose") |
d4b8422f RS |
246 | (erase-buffer) |
247 | (insert "Available choices:\n\n") | |
248 | (while items | |
249 | (setq choice (car items) items (cdr items)) | |
250 | (if (consp choice) | |
251 | (let* ((name (car choice)) | |
252 | (function (cdr choice))) | |
253 | (insert (format "%c = %s\n" next-digit name)) | |
cfc198e5 RS |
254 | (define-key map (vector next-digit) function) |
255 | (setq some-choice-enabled t))) | |
d4b8422f RS |
256 | ;; Allocate digits to disabled alternatives |
257 | ;; so that the digit of a given alternative never varies. | |
258 | (setq next-digit (1+ next-digit))) | |
259 | (insert "\nC-g = Quit")) | |
cfc198e5 RS |
260 | (or some-choice-enabled |
261 | (error "None of the choices is currently meaningful")) | |
d4b8422f | 262 | (define-key map [?\C-g] 'keyboard-quit) |
0b296dac | 263 | (define-key map [t] 'keyboard-quit) |
4d52438e KH |
264 | (define-key map [?\M-\C-v] 'scroll-other-window) |
265 | (define-key map [?\M--] 'negative-argument) | |
0b296dac | 266 | (setcdr map (nreverse (cdr map))) |
0b296dac RS |
267 | ;; Read a char with the menu, and return the result |
268 | ;; that corresponds to it. | |
d4b8422f | 269 | (save-window-excursion |
4d52438e | 270 | (let ((buf (get-buffer " widget-choose"))) |
d970106b | 271 | (fit-window-to-buffer (display-buffer buf)) |
4d52438e KH |
272 | (let ((cursor-in-echo-area t) |
273 | keys | |
274 | (char 0) | |
275 | (arg 1)) | |
421be070 RS |
276 | (while (not (or (and (integerp char) |
277 | (>= char ?0) (< char next-digit)) | |
4d52438e KH |
278 | (eq value 'keyboard-quit))) |
279 | ;; Unread a SPC to lead to our new menu. | |
00d00aa9 | 280 | (setq unread-command-events (cons ?\s unread-command-events)) |
4d52438e | 281 | (setq keys (read-key-sequence title)) |
bfa6c260 DL |
282 | (setq value |
283 | (lookup-key overriding-terminal-local-map keys t) | |
421be070 | 284 | char (aref keys 1)) |
4d52438e | 285 | (cond ((eq value 'scroll-other-window) |
bfa6c260 DL |
286 | (let ((minibuffer-scroll-window |
287 | (get-buffer-window buf))) | |
4d52438e | 288 | (if (> 0 arg) |
bfa6c260 DL |
289 | (scroll-other-window-down |
290 | (window-height minibuffer-scroll-window)) | |
4d52438e KH |
291 | (scroll-other-window)) |
292 | (setq arg 1))) | |
293 | ((eq value 'negative-argument) | |
294 | (setq arg -1)) | |
295 | (t | |
296 | (setq arg 1))))))) | |
0b296dac RS |
297 | (when (eq value 'keyboard-quit) |
298 | (error "Canceled")) | |
299 | value)))) | |
d543e20b | 300 | |
e5dfabb4 RS |
301 | (defun widget-remove-if (predictate list) |
302 | (let (result (tail list)) | |
303 | (while tail | |
304 | (or (funcall predictate (car tail)) | |
305 | (setq result (cons (car tail) result))) | |
306 | (setq tail (cdr tail))) | |
307 | (nreverse result))) | |
308 | ||
d543e20b | 309 | ;;; Widget text specifications. |
77339a6e | 310 | ;; |
bfa6c260 | 311 | ;; These functions are for specifying text properties. |
d543e20b | 312 | |
7c0a9c8f SM |
313 | ;; We can set it to nil now that get_local_map uses get_pos_property. |
314 | (defconst widget-field-add-space nil | |
8697863a | 315 | "Non-nil means add extra space at the end of editable text fields. |
8697863a | 316 | If you don't add the space, it will become impossible to edit a zero |
bfa6c260 | 317 | size field.") |
8697863a | 318 | |
bfa6c260 | 319 | (defvar widget-field-use-before-change t |
da5ec617 | 320 | "Non-nil means use `before-change-functions' to track editable fields. |
bfa6c260 | 321 | This enables the use of undo, but doesn't work on Emacs 19.34 and earlier. |
da5ec617 | 322 | Using before hooks also means that the :notify function can't know the |
bfa6c260 | 323 | new value.") |
da5ec617 | 324 | |
d543e20b | 325 | (defun widget-specify-field (widget from to) |
0a3a0b56 | 326 | "Specify editable button for WIDGET between FROM and TO." |
0ce5b5d5 PA |
327 | ;; Terminating space is not part of the field, but necessary in |
328 | ;; order for local-map to work. Remove next sexp if local-map works | |
329 | ;; at the end of the overlay. | |
330 | (save-excursion | |
331 | (goto-char to) | |
62f44662 PA |
332 | (cond ((null (widget-get widget :size)) |
333 | (forward-char 1)) | |
334 | (widget-field-add-space | |
335 | (insert-and-inherit " "))) | |
0ce5b5d5 | 336 | (setq to (point))) |
a850ac03 | 337 | (let ((keymap (widget-get widget :keymap)) |
0efefc52 | 338 | (face (or (widget-get widget :value-face) 'widget-field)) |
a850ac03 | 339 | (help-echo (widget-get widget :help-echo)) |
0fa42821 | 340 | (follow-link (widget-get widget :follow-link)) |
a850ac03 MB |
341 | (rear-sticky |
342 | (or (not widget-field-add-space) (widget-get widget :size)))) | |
233d5cde | 343 | (if (functionp help-echo) |
77339a6e | 344 | (setq help-echo 'widget-mouse-help)) |
a850ac03 MB |
345 | (when (= (char-before to) ?\n) |
346 | ;; When the last character in the field is a newline, we want to | |
347 | ;; give it a `field' char-property of `boundary', which helps the | |
348 | ;; C-n/C-p act more naturally when entering/leaving the field. We | |
349 | ;; do this by making a small secondary overlay to contain just that | |
350 | ;; one character. | |
351 | (let ((overlay (make-overlay (1- to) to nil t nil))) | |
352 | (overlay-put overlay 'field 'boundary) | |
263a40a6 RS |
353 | ;; We need the real field for tabbing. |
354 | (overlay-put overlay 'real-field widget) | |
5701edda DL |
355 | ;; Use `local-map' here, not `keymap', so that normal editing |
356 | ;; works in the field when, say, Custom uses `suppress-keymap'. | |
357 | (overlay-put overlay 'local-map keymap) | |
a850ac03 | 358 | (overlay-put overlay 'face face) |
0fa42821 | 359 | (overlay-put overlay 'follow-link follow-link) |
a850ac03 MB |
360 | (overlay-put overlay 'help-echo help-echo)) |
361 | (setq to (1- to)) | |
362 | (setq rear-sticky t)) | |
363 | (let ((overlay (make-overlay from to nil nil rear-sticky))) | |
364 | (widget-put widget :field-overlay overlay) | |
365 | ;;(overlay-put overlay 'detachable nil) | |
366 | (overlay-put overlay 'field widget) | |
5701edda | 367 | (overlay-put overlay 'local-map keymap) |
a850ac03 | 368 | (overlay-put overlay 'face face) |
0fa42821 | 369 | (overlay-put overlay 'follow-link follow-link) |
a850ac03 | 370 | (overlay-put overlay 'help-echo help-echo))) |
e9367b9c RS |
371 | (widget-specify-secret widget)) |
372 | ||
373 | (defun widget-specify-secret (field) | |
374 | "Replace text in FIELD with value of `:secret', if non-nil." | |
375 | (let ((secret (widget-get field :secret)) | |
376 | (size (widget-get field :size))) | |
377 | (when secret | |
378 | (let ((begin (widget-field-start field)) | |
379 | (end (widget-field-end field))) | |
bfa6c260 | 380 | (when size |
e9367b9c | 381 | (while (and (> end begin) |
00d00aa9 | 382 | (eq (char-after (1- end)) ?\s)) |
e9367b9c RS |
383 | (setq end (1- end)))) |
384 | (while (< begin end) | |
385 | (let ((old (char-after begin))) | |
386 | (unless (eq old secret) | |
387 | (subst-char-in-region begin (1+ begin) old secret) | |
388 | (put-text-property begin (1+ begin) 'secret old)) | |
389 | (setq begin (1+ begin)))))))) | |
d543e20b | 390 | |
d543e20b | 391 | (defun widget-specify-button (widget from to) |
0a3a0b56 | 392 | "Specify button for WIDGET between FROM and TO." |
233d5cde | 393 | (let ((overlay (make-overlay from to nil t nil)) |
0fa42821 | 394 | (follow-link (widget-get widget :follow-link)) |
233d5cde | 395 | (help-echo (widget-get widget :help-echo))) |
0a3a0b56 | 396 | (widget-put widget :button-overlay overlay) |
233d5cde DL |
397 | (if (functionp help-echo) |
398 | (setq help-echo 'widget-mouse-help)) | |
0a3a0b56 | 399 | (overlay-put overlay 'button widget) |
7fdbdbea | 400 | (overlay-put overlay 'keymap (widget-get widget :keymap)) |
f24485f1 | 401 | (overlay-put overlay 'evaporate t) |
bfa6c260 DL |
402 | ;; We want to avoid the face with image buttons. |
403 | (unless (widget-get widget :suppress-face) | |
5eb8942b | 404 | (overlay-put overlay 'face (widget-apply widget :button-face-get)) |
3bff434b | 405 | (overlay-put overlay 'mouse-face |
cc2fba21 RS |
406 | ;; Make new list structure for the mouse-face value |
407 | ;; so that different widgets will have | |
408 | ;; different `mouse-face' property values | |
409 | ;; and will highlight separately. | |
410 | (let ((mouse-face-value | |
411 | (widget-apply widget :mouse-face-get))) | |
412 | ;; If it's a list, copy it. | |
413 | (if (listp mouse-face-value) | |
414 | (copy-sequence mouse-face-value) | |
415 | ;; If it's a symbol, put it in a list. | |
416 | (list mouse-face-value))))) | |
0e726aa5 | 417 | (overlay-put overlay 'pointer 'hand) |
0fa42821 | 418 | (overlay-put overlay 'follow-link follow-link) |
233d5cde DL |
419 | (overlay-put overlay 'help-echo help-echo))) |
420 | ||
421 | (defun widget-mouse-help (window overlay point) | |
422 | "Help-echo callback for widgets whose :help-echo is a function." | |
423 | (with-current-buffer (overlay-buffer overlay) | |
424 | (let* ((widget (widget-at (overlay-start overlay))) | |
425 | (help-echo (if widget (widget-get widget :help-echo)))) | |
426 | (if (functionp help-echo) | |
427 | (funcall help-echo widget) | |
428 | help-echo)))) | |
d543e20b | 429 | |
d543e20b | 430 | (defun widget-specify-sample (widget from to) |
bfa6c260 | 431 | "Specify sample for WIDGET between FROM and TO." |
7fdbdbea DL |
432 | (let ((overlay (make-overlay from to nil t nil))) |
433 | (overlay-put overlay 'face (widget-apply widget :sample-face-get)) | |
f24485f1 | 434 | (overlay-put overlay 'evaporate t) |
0f648ca2 PA |
435 | (widget-put widget :sample-overlay overlay))) |
436 | ||
d543e20b | 437 | (defun widget-specify-doc (widget from to) |
bfa6c260 | 438 | "Specify documentation for WIDGET between FROM and TO." |
4ee1cf9f PA |
439 | (let ((overlay (make-overlay from to nil t nil))) |
440 | (overlay-put overlay 'widget-doc widget) | |
441 | (overlay-put overlay 'face widget-documentation-face) | |
f24485f1 | 442 | (overlay-put overlay 'evaporate t) |
4ee1cf9f | 443 | (widget-put widget :doc-overlay overlay))) |
d543e20b PA |
444 | |
445 | (defmacro widget-specify-insert (&rest form) | |
bfa6c260 DL |
446 | "Execute FORM without inheriting any text properties." |
447 | `(save-restriction | |
448 | (let ((inhibit-read-only t) | |
407e43be SM |
449 | (inhibit-modification-hooks t)) |
450 | (narrow-to-region (point) (point)) | |
451 | (prog1 (progn ,@form) | |
452 | (goto-char (point-max)))))) | |
d543e20b | 453 | |
6866bf6a JL |
454 | (defface widget-inactive |
455 | '((t :inherit shadow)) | |
d543e20b | 456 | "Face used for inactive widgets." |
6aaedd12 | 457 | :group 'widget-faces) |
0efefc52 MB |
458 | ;; backward-compatibility alias |
459 | (put 'widget-inactive-face 'face-alias 'widget-inactive) | |
d543e20b PA |
460 | |
461 | (defun widget-specify-inactive (widget from to) | |
462 | "Make WIDGET inactive for user modifications." | |
463 | (unless (widget-get widget :inactive) | |
464 | (let ((overlay (make-overlay from to nil t nil))) | |
0efefc52 | 465 | (overlay-put overlay 'face 'widget-inactive) |
6aaedd12 | 466 | ;; This is disabled, as it makes the mouse cursor change shape. |
0efefc52 | 467 | ;; (overlay-put overlay 'mouse-face 'widget-inactive) |
6d528fc5 PA |
468 | (overlay-put overlay 'evaporate t) |
469 | (overlay-put overlay 'priority 100) | |
a89a9d34 | 470 | (overlay-put overlay 'modification-hooks '(widget-overlay-inactive)) |
d543e20b PA |
471 | (widget-put widget :inactive overlay)))) |
472 | ||
473 | (defun widget-overlay-inactive (&rest junk) | |
474 | "Ignoring the arguments, signal an error." | |
475 | (unless inhibit-read-only | |
a89a9d34 | 476 | (error "The widget here is not active"))) |
d543e20b PA |
477 | |
478 | ||
479 | (defun widget-specify-active (widget) | |
480 | "Make WIDGET active for user modifications." | |
481 | (let ((inactive (widget-get widget :inactive))) | |
482 | (when inactive | |
483 | (delete-overlay inactive) | |
484 | (widget-put widget :inactive nil)))) | |
485 | ||
486 | ;;; Widget Properties. | |
487 | ||
488 | (defsubst widget-type (widget) | |
e5784820 | 489 | "Return the type of WIDGET. The type is a symbol." |
d543e20b PA |
490 | (car widget)) |
491 | ||
0e520006 PA |
492 | ;;;###autoload |
493 | (defun widgetp (widget) | |
4837b516 | 494 | "Return non-nil if WIDGET is a widget." |
0e520006 PA |
495 | (if (symbolp widget) |
496 | (get widget 'widget-type) | |
497 | (and (consp widget) | |
bbc562cc PA |
498 | (symbolp (car widget)) |
499 | (get (car widget) 'widget-type)))) | |
0e520006 | 500 | |
944c91b6 PA |
501 | (defun widget-get-indirect (widget property) |
502 | "In WIDGET, get the value of PROPERTY. | |
bfa6c260 | 503 | If the value is a symbol, return its binding. |
944c91b6 PA |
504 | Otherwise, just return the value." |
505 | (let ((value (widget-get widget property))) | |
506 | (if (symbolp value) | |
507 | (symbol-value value) | |
508 | value))) | |
509 | ||
d543e20b | 510 | (defun widget-member (widget property) |
4837b516 | 511 | "Non-nil if there is a definition in WIDGET for PROPERTY." |
ff83e968 | 512 | (cond ((plist-member (cdr widget) property) |
d543e20b PA |
513 | t) |
514 | ((car widget) | |
515 | (widget-member (get (car widget) 'widget-type) property)) | |
516 | (t nil))) | |
517 | ||
d543e20b PA |
518 | (defun widget-value (widget) |
519 | "Extract the current value of WIDGET." | |
520 | (widget-apply widget | |
521 | :value-to-external (widget-apply widget :value-get))) | |
522 | ||
523 | (defun widget-value-set (widget value) | |
524 | "Set the current value of WIDGET to VALUE." | |
525 | (widget-apply widget | |
526 | :value-set (widget-apply widget | |
527 | :value-to-internal value))) | |
528 | ||
783824f5 | 529 | (defun widget-default-get (widget) |
4c2f559e | 530 | "Extract the default external value of WIDGET." |
77339a6e | 531 | (widget-apply widget :value-to-external |
4c2f559e PA |
532 | (or (widget-get widget :value) |
533 | (widget-apply widget :default-get)))) | |
783824f5 | 534 | |
d543e20b | 535 | (defun widget-match-inline (widget vals) |
a89a9d34 | 536 | "In WIDGET, match the start of VALS." |
d543e20b PA |
537 | (cond ((widget-get widget :inline) |
538 | (widget-apply widget :match-inline vals)) | |
b2aeee30 | 539 | ((and (listp vals) |
d543e20b PA |
540 | (widget-apply widget :match (car vals))) |
541 | (cons (list (car vals)) (cdr vals))) | |
542 | (t nil))) | |
543 | ||
544 | (defun widget-apply-action (widget &optional event) | |
545 | "Apply :action in WIDGET in response to EVENT." | |
8697863a PA |
546 | (if (widget-apply widget :active) |
547 | (widget-apply widget :action event) | |
548 | (error "Attempt to perform action on inactive widget"))) | |
6d528fc5 | 549 | |
a3c88c59 PA |
550 | ;;; Helper functions. |
551 | ;; | |
552 | ;; These are widget specific. | |
553 | ||
554 | ;;;###autoload | |
555 | (defun widget-prompt-value (widget prompt &optional value unbound) | |
556 | "Prompt for a value matching WIDGET, using PROMPT. | |
557 | The current value is assumed to be VALUE, unless UNBOUND is non-nil." | |
558 | (unless (listp widget) | |
559 | (setq widget (list widget))) | |
560 | (setq prompt (format "[%s] %s" (widget-type widget) prompt)) | |
561 | (setq widget (widget-convert widget)) | |
562 | (let ((answer (widget-apply widget :prompt-value prompt value unbound))) | |
563 | (unless (widget-apply widget :match answer) | |
bfa6c260 | 564 | (error "Value does not match %S type" (car widget))) |
a3c88c59 PA |
565 | answer)) |
566 | ||
567 | (defun widget-get-sibling (widget) | |
568 | "Get the item WIDGET is assumed to toggle. | |
569 | This is only meaningful for radio buttons or checkboxes in a list." | |
7fdbdbea | 570 | (let* ((children (widget-get (widget-get widget :parent) :children)) |
a3c88c59 PA |
571 | child) |
572 | (catch 'child | |
573 | (while children | |
574 | (setq child (car children) | |
575 | children (cdr children)) | |
576 | (when (eq (widget-get child :button) widget) | |
577 | (throw 'child child))) | |
578 | nil))) | |
579 | ||
6aaedd12 PA |
580 | (defun widget-map-buttons (function &optional buffer maparg) |
581 | "Map FUNCTION over the buttons in BUFFER. | |
582 | FUNCTION is called with the arguments WIDGET and MAPARG. | |
583 | ||
584 | If FUNCTION returns non-nil, the walk is cancelled. | |
585 | ||
586 | The arguments MAPARG, and BUFFER default to nil and (current-buffer), | |
587 | respectively." | |
588 | (let ((cur (point-min)) | |
589 | (widget nil) | |
6aaedd12 | 590 | (overlays (if buffer |
7c0a9c8f | 591 | (with-current-buffer buffer (overlay-lists)) |
6aaedd12 PA |
592 | (overlay-lists)))) |
593 | (setq overlays (append (car overlays) (cdr overlays))) | |
594 | (while (setq cur (pop overlays)) | |
595 | (setq widget (overlay-get cur 'button)) | |
596 | (if (and widget (funcall function widget maparg)) | |
597 | (setq overlays nil))))) | |
598 | ||
bfa6c260 | 599 | ;;; Images. |
d543e20b | 600 | |
bfa6c260 | 601 | (defcustom widget-image-directory (file-name-as-directory |
0f936484 | 602 | (expand-file-name "images/custom" data-directory)) |
bfa6c260 | 603 | "Where widget button images are located. |
d543e20b | 604 | If this variable is nil, widget will try to locate the directory |
25ac13b5 | 605 | automatically." |
d543e20b PA |
606 | :group 'widgets |
607 | :type 'directory) | |
608 | ||
bfa6c260 | 609 | (defcustom widget-image-enable t |
80b709bc | 610 | "If non-nil, use image buttons in widgets when available." |
bfa6c260 | 611 | :version "21.1" |
d543e20b PA |
612 | :group 'widgets |
613 | :type 'boolean) | |
614 | ||
25ac13b5 PA |
615 | (defcustom widget-image-conversion |
616 | '((xpm ".xpm") (gif ".gif") (png ".png") (jpeg ".jpg" ".jpeg") | |
617 | (xbm ".xbm")) | |
618 | "Conversion alist from image formats to file name suffixes." | |
619 | :group 'widgets | |
620 | :type '(repeat (cons :format "%v" | |
621 | (symbol :tag "Image Format" unknown) | |
622 | (repeat :tag "Suffixes" | |
623 | (string :format "%v"))))) | |
624 | ||
bfa6c260 DL |
625 | (defun widget-image-find (image) |
626 | "Create a graphical button from IMAGE. | |
627 | IMAGE should either already be an image, or be a file name sans | |
3acab5ef | 628 | extension (xpm, xbm, gif, jpg, or png) located in |
bfa6c260 DL |
629 | `widget-image-directory' or otherwise where `find-image' will find it." |
630 | (cond ((not (and image widget-image-enable (display-graphic-p))) | |
631 | ;; We don't want or can't use images. | |
3acab5ef | 632 | nil) |
bfa6c260 DL |
633 | ((and (consp image) |
634 | (eq 'image (car image))) | |
635 | ;; Already an image spec. Use it. | |
3acab5ef | 636 | image) |
25ac13b5 PA |
637 | ((stringp image) |
638 | ;; A string. Look it up in relevant directories. | |
bfa6c260 | 639 | (let* ((load-path (cons widget-image-directory load-path)) |
bfa6c260 DL |
640 | specs) |
641 | (dolist (elt widget-image-conversion) | |
642 | (dolist (ext (cdr elt)) | |
643 | (push (list :type (car elt) :file (concat image ext)) specs))) | |
644 | (setq specs (nreverse specs)) | |
645 | (find-image specs))) | |
d543e20b | 646 | (t |
25ac13b5 | 647 | ;; Oh well. |
3acab5ef PA |
648 | nil))) |
649 | ||
0efefc52 | 650 | (defvar widget-button-pressed-face 'widget-button-pressed |
bfa6c260 DL |
651 | "Face used for pressed buttons in widgets. |
652 | This exists as a variable so it can be set locally in certain | |
653 | buffers.") | |
654 | ||
655 | (defun widget-image-insert (widget tag image &optional down inactive) | |
3acab5ef | 656 | "In WIDGET, insert the text TAG or, if supported, IMAGE. |
bfa6c260 DL |
657 | IMAGE should either be an image or an image file name sans extension |
658 | \(xpm, xbm, gif, jpg, or png) located in `widget-image-directory'. | |
659 | ||
660 | Optional arguments DOWN and INACTIVE are used instead of IMAGE when the | |
661 | button is pressed or inactive, respectively. These are currently ignored." | |
662 | (if (and (display-graphic-p) | |
663 | (setq image (widget-image-find image))) | |
664 | (progn (widget-put widget :suppress-face t) | |
665 | (insert-image image | |
666 | (propertize | |
edf29496 SM |
667 | ;; Use a `list' so it's unique and won't get |
668 | ;; accidentally merged with neighbouring images. | |
669 | tag 'mouse-face (list widget-button-pressed-face)))) | |
bfa6c260 | 670 | (insert tag))) |
d543e20b | 671 | |
e6038ca3 CY |
672 | (defun widget-move-and-invoke (event) |
673 | "Move to where you click, and if it is an active field, invoke it." | |
674 | (interactive "e") | |
675 | (mouse-set-point event) | |
87911bdb CY |
676 | (let ((pos (widget-event-point event))) |
677 | (if (and pos (get-char-property pos 'button)) | |
678 | (widget-button-click event)))) | |
e6038ca3 | 679 | |
25ac13b5 PA |
680 | ;;; Buttons. |
681 | ||
682 | (defgroup widget-button nil | |
683 | "The look of various kinds of buttons." | |
684 | :group 'widgets) | |
685 | ||
686 | (defcustom widget-button-prefix "" | |
687 | "String used as prefix for buttons." | |
688 | :type 'string | |
3acab5ef | 689 | :group 'widget-button) |
25ac13b5 PA |
690 | |
691 | (defcustom widget-button-suffix "" | |
692 | "String used as suffix for buttons." | |
693 | :type 'string | |
3acab5ef | 694 | :group 'widget-button) |
25ac13b5 | 695 | |
d543e20b PA |
696 | ;;; Creating Widgets. |
697 | ||
698 | ;;;###autoload | |
699 | (defun widget-create (type &rest args) | |
bfa6c260 | 700 | "Create widget of TYPE. |
d543e20b PA |
701 | The optional ARGS are additional keyword arguments." |
702 | (let ((widget (apply 'widget-convert type args))) | |
703 | (widget-apply widget :create) | |
704 | widget)) | |
705 | ||
706 | (defun widget-create-child-and-convert (parent type &rest args) | |
707 | "As part of the widget PARENT, create a child widget TYPE. | |
708 | The child is converted, using the keyword arguments ARGS." | |
709 | (let ((widget (apply 'widget-convert type args))) | |
710 | (widget-put widget :parent parent) | |
711 | (unless (widget-get widget :indent) | |
712 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
713 | (or (widget-get widget :extra-offset) 0) | |
714 | (widget-get parent :offset)))) | |
715 | (widget-apply widget :create) | |
716 | widget)) | |
717 | ||
718 | (defun widget-create-child (parent type) | |
719 | "Create widget of TYPE." | |
4c2f559e | 720 | (let ((widget (widget-copy type))) |
d543e20b PA |
721 | (widget-put widget :parent parent) |
722 | (unless (widget-get widget :indent) | |
723 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
724 | (or (widget-get widget :extra-offset) 0) | |
725 | (widget-get parent :offset)))) | |
726 | (widget-apply widget :create) | |
727 | widget)) | |
728 | ||
729 | (defun widget-create-child-value (parent type value) | |
730 | "Create widget of TYPE with value VALUE." | |
4c2f559e | 731 | (let ((widget (widget-copy type))) |
d543e20b PA |
732 | (widget-put widget :value (widget-apply widget :value-to-internal value)) |
733 | (widget-put widget :parent parent) | |
734 | (unless (widget-get widget :indent) | |
735 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
736 | (or (widget-get widget :extra-offset) 0) | |
737 | (widget-get parent :offset)))) | |
738 | (widget-apply widget :create) | |
739 | widget)) | |
740 | ||
741 | ;;;###autoload | |
742 | (defun widget-delete (widget) | |
743 | "Delete WIDGET." | |
744 | (widget-apply widget :delete)) | |
745 | ||
4c2f559e PA |
746 | (defun widget-copy (widget) |
747 | "Make a deep copy of WIDGET." | |
748 | (widget-apply (copy-sequence widget) :copy)) | |
749 | ||
d543e20b | 750 | (defun widget-convert (type &rest args) |
bfa6c260 | 751 | "Convert TYPE to a widget without inserting it in the buffer. |
d543e20b PA |
752 | The optional ARGS are additional keyword arguments." |
753 | ;; Don't touch the type. | |
bfa6c260 | 754 | (let* ((widget (if (symbolp type) |
d543e20b | 755 | (list type) |
ef3f635f | 756 | (copy-sequence type))) |
d543e20b | 757 | (current widget) |
ab6a3668 | 758 | done |
d543e20b PA |
759 | (keys args)) |
760 | ;; First set the :args keyword. | |
761 | (while (cdr current) ;Look in the type. | |
ab6a3668 RS |
762 | (if (and (keywordp (cadr current)) |
763 | ;; If the last element is a keyword, | |
764 | ;; it is still the :args element, | |
765 | ;; even though it is a keyword. | |
766 | (cddr current)) | |
767 | (if (eq (cadr current) :args) | |
768 | ;; If :args is explicitly specified, obey it. | |
769 | (setq current nil) | |
770 | ;; Some other irrelevant keyword. | |
771 | (setq current (cdr (cdr current)))) | |
7fdbdbea DL |
772 | (setcdr current (list :args (cdr current))) |
773 | (setq current nil))) | |
ab6a3668 RS |
774 | (while (and args (not done)) ;Look in ARGS. |
775 | (cond ((eq (car args) :args) | |
776 | ;; Handle explicit specification of :args. | |
777 | (setq args (cadr args) | |
778 | done t)) | |
779 | ((keywordp (car args)) | |
780 | (setq args (cddr args))) | |
781 | (t (setq done t)))) | |
782 | (when done | |
783 | (widget-put widget :args args)) | |
d543e20b PA |
784 | ;; Then Convert the widget. |
785 | (setq type widget) | |
786 | (while type | |
787 | (let ((convert-widget (plist-get (cdr type) :convert-widget))) | |
788 | (if convert-widget | |
789 | (setq widget (funcall convert-widget widget)))) | |
790 | (setq type (get (car type) 'widget-type))) | |
791 | ;; Finally set the keyword args. | |
bfa6c260 | 792 | (while keys |
d543e20b | 793 | (let ((next (nth 0 keys))) |
bfa6c260 DL |
794 | (if (keywordp next) |
795 | (progn | |
d543e20b PA |
796 | (widget-put widget next (nth 1 keys)) |
797 | (setq keys (nthcdr 2 keys))) | |
798 | (setq keys nil)))) | |
799 | ;; Convert the :value to internal format. | |
800 | (if (widget-member widget :value) | |
7fdbdbea DL |
801 | (widget-put widget |
802 | :value (widget-apply widget | |
803 | :value-to-internal | |
804 | (widget-get widget :value)))) | |
d543e20b PA |
805 | ;; Return the newly create widget. |
806 | widget)) | |
807 | ||
0e520006 | 808 | ;;;###autoload |
d543e20b | 809 | (defun widget-insert (&rest args) |
7fdbdbea | 810 | "Call `insert' with ARGS even if surrounding text is read only." |
d543e20b | 811 | (let ((inhibit-read-only t) |
7fdbdbea | 812 | (inhibit-modification-hooks t)) |
4ee1cf9f | 813 | (apply 'insert args))) |
d543e20b | 814 | |
8697863a PA |
815 | (defun widget-convert-text (type from to |
816 | &optional button-from button-to | |
817 | &rest args) | |
6aaedd12 | 818 | "Return a widget of type TYPE with endpoint FROM TO. |
00d00aa9 JB |
819 | No text will be inserted to the buffer, instead the text between FROM |
820 | and TO will be used as the widgets end points. If optional arguments | |
6aaedd12 | 821 | BUTTON-FROM and BUTTON-TO are given, these will be used as the widgets |
8697863a PA |
822 | button end points. |
823 | Optional ARGS are extra keyword arguments for TYPE." | |
824 | (let ((widget (apply 'widget-convert type :delete 'widget-leave-text args)) | |
6aaedd12 | 825 | (from (copy-marker from)) |
2ff864e0 | 826 | (to (copy-marker to))) |
6aaedd12 PA |
827 | (set-marker-insertion-type from t) |
828 | (set-marker-insertion-type to nil) | |
829 | (widget-put widget :from from) | |
830 | (widget-put widget :to to) | |
831 | (when button-from | |
832 | (widget-specify-button widget button-from button-to)) | |
833 | widget)) | |
834 | ||
8697863a | 835 | (defun widget-convert-button (type from to &rest args) |
6aaedd12 | 836 | "Return a widget of type TYPE with endpoint FROM TO. |
8697863a | 837 | Optional ARGS are extra keyword arguments for TYPE. |
6aaedd12 PA |
838 | No text will be inserted to the buffer, instead the text between FROM |
839 | and TO will be used as the widgets end points, as well as the widgets | |
840 | button end points." | |
8697863a PA |
841 | (apply 'widget-convert-text type from to from to args)) |
842 | ||
843 | (defun widget-leave-text (widget) | |
844 | "Remove markers and overlays from WIDGET and its children." | |
7fdbdbea | 845 | (let ((button (widget-get widget :button-overlay)) |
0f648ca2 | 846 | (sample (widget-get widget :sample-overlay)) |
4ee1cf9f | 847 | (doc (widget-get widget :doc-overlay)) |
7fdbdbea DL |
848 | (field (widget-get widget :field-overlay))) |
849 | (set-marker (widget-get widget :from) nil) | |
850 | (set-marker (widget-get widget :to) nil) | |
208920be PA |
851 | (when button |
852 | (delete-overlay button)) | |
0f648ca2 PA |
853 | (when sample |
854 | (delete-overlay sample)) | |
4ee1cf9f PA |
855 | (when doc |
856 | (delete-overlay doc)) | |
208920be PA |
857 | (when field |
858 | (delete-overlay field)) | |
7fdbdbea | 859 | (mapc 'widget-leave-text (widget-get widget :children)))) |
6aaedd12 | 860 | |
d543e20b PA |
861 | ;;; Keymap and Commands. |
862 | ||
cd8990c1 RS |
863 | ;;;###autoload |
864 | (defalias 'advertised-widget-backward 'widget-backward) | |
865 | ||
0e520006 | 866 | ;;;###autoload |
bfa6c260 DL |
867 | (defvar widget-keymap |
868 | (let ((map (make-sparse-keymap))) | |
869 | (define-key map "\t" 'widget-forward) | |
82b1b71e | 870 | (define-key map "\e\t" 'widget-backward) |
cd8990c1 | 871 | (define-key map [(shift tab)] 'advertised-widget-backward) |
bfa6c260 DL |
872 | (define-key map [backtab] 'widget-backward) |
873 | (define-key map [down-mouse-2] 'widget-button-click) | |
bb55f90e | 874 | (define-key map [down-mouse-1] 'widget-button-click) |
2b786e07 JR |
875 | ;; The following definition needs to avoid using escape sequences that |
876 | ;; might get converted to ^M when building loaddefs.el | |
877 | (define-key map [(control ?m)] 'widget-button-press) | |
bfa6c260 | 878 | map) |
d543e20b PA |
879 | "Keymap containing useful binding for buffers containing widgets. |
880 | Recommended as a parent keymap for modes using widgets.") | |
881 | ||
d543e20b | 882 | (defvar widget-global-map global-map |
f4b020f6 | 883 | "Keymap used for events a widget does not handle itself.") |
d543e20b PA |
884 | (make-variable-buffer-local 'widget-global-map) |
885 | ||
bfa6c260 DL |
886 | (defvar widget-field-keymap |
887 | (let ((map (copy-keymap widget-keymap))) | |
bfa6c260 DL |
888 | (define-key map "\C-k" 'widget-kill-line) |
889 | (define-key map "\M-\t" 'widget-complete) | |
890 | (define-key map "\C-m" 'widget-field-activate) | |
8b9a0f45 | 891 | ;; Since the widget code uses a `field' property to identify fields, |
0697c662 | 892 | ;; ordinary beginning-of-line does the right thing. |
8b9a0f45 | 893 | ;; (define-key map "\C-a" 'widget-beginning-of-line) |
0697c662 | 894 | (define-key map "\C-e" 'widget-end-of-line) |
bfa6c260 | 895 | map) |
d543e20b PA |
896 | "Keymap used inside an editable field.") |
897 | ||
bfa6c260 DL |
898 | (defvar widget-text-keymap |
899 | (let ((map (copy-keymap widget-keymap))) | |
8b9a0f45 | 900 | ;; Since the widget code uses a `field' property to identify fields, |
0697c662 | 901 | ;; ordinary beginning-of-line does the right thing. |
8b9a0f45 | 902 | ;; (define-key map "\C-a" 'widget-beginning-of-line) |
0697c662 | 903 | (define-key map "\C-e" 'widget-end-of-line) |
bfa6c260 | 904 | map) |
d543e20b PA |
905 | "Keymap used inside a text field.") |
906 | ||
d543e20b | 907 | (defun widget-field-activate (pos &optional event) |
e2896b22 | 908 | "Invoke the editable field at point." |
d543e20b | 909 | (interactive "@d") |
a850ac03 | 910 | (let ((field (widget-field-at pos))) |
d543e20b PA |
911 | (if field |
912 | (widget-apply-action field event) | |
913 | (call-interactively | |
914 | (lookup-key widget-global-map (this-command-keys)))))) | |
915 | ||
0efefc52 | 916 | (defface widget-button-pressed |
ea81d57e DN |
917 | '((((min-colors 88) (class color)) |
918 | (:foreground "red1")) | |
919 | (((class color)) | |
a3c88c59 PA |
920 | (:foreground "red")) |
921 | (t | |
e31c1fd5 | 922 | (:weight bold :underline t))) |
a3c88c59 | 923 | "Face used for pressed buttons." |
6aaedd12 | 924 | :group 'widget-faces) |
0efefc52 MB |
925 | ;; backward-compatibility alias |
926 | (put 'widget-button-pressed-face 'face-alias 'widget-button-pressed) | |
a3c88c59 | 927 | |
b0c4ae71 CY |
928 | (defvar widget-button-click-moves-point nil |
929 | "If non-nil, `widget-button-click' moves point to a button after invoking it. | |
930 | If nil, point returns to its original position after invoking a button.") | |
931 | ||
d543e20b | 932 | (defun widget-button-click (event) |
bfa6c260 | 933 | "Invoke the button that the mouse is pointing at." |
bc3420db | 934 | (interactive "e") |
bfa6c260 | 935 | (if (widget-event-point event) |
bc7b6e08 CY |
936 | (let* ((oevent event) |
937 | (mouse-1 (memq (event-basic-type event) '(mouse-1 down-mouse-1))) | |
938 | (pos (widget-event-point event)) | |
bc3420db | 939 | (start (event-start event)) |
77339a6e | 940 | (button (get-char-property |
bc3420db | 941 | pos 'button (and (windowp (posn-window start)) |
b0c4ae71 CY |
942 | (window-buffer (posn-window start))))) |
943 | newpoint) | |
bc7b6e08 CY |
944 | (when (or (null button) |
945 | (catch 'button-press-cancelled | |
946 | ;; Mouse click on a widget button. Do the following | |
947 | ;; in a save-excursion so that the click on the button | |
948 | ;; doesn't change point. | |
949 | (save-selected-window | |
950 | (select-window (posn-window (event-start event))) | |
951 | (save-excursion | |
952 | (goto-char (posn-point (event-start event))) | |
953 | (let* ((overlay (widget-get button :button-overlay)) | |
954 | (pressed-face (or (widget-get button :pressed-face) | |
955 | widget-button-pressed-face)) | |
956 | (face (overlay-get overlay 'face)) | |
957 | (mouse-face (overlay-get overlay 'mouse-face))) | |
958 | (unwind-protect | |
959 | ;; Read events, including mouse-movement | |
960 | ;; events, waiting for a release event. If we | |
961 | ;; began with a mouse-1 event and receive a | |
962 | ;; movement event, that means the user wants | |
963 | ;; to perform drag-selection, so cancel the | |
964 | ;; button press and do the default mouse-1 | |
965 | ;; action. For mouse-2, just highlight/ | |
966 | ;; unhighlight the button the mouse was | |
967 | ;; initially on when we move over it. | |
968 | (save-excursion | |
969 | (when face ; avoid changing around image | |
970 | (overlay-put overlay 'face pressed-face) | |
971 | (overlay-put overlay 'mouse-face pressed-face)) | |
972 | (unless (widget-apply button :mouse-down-action event) | |
973 | (let ((track-mouse t)) | |
974 | (while (not (widget-button-release-event-p event)) | |
975 | (setq event (read-event)) | |
976 | (when (and mouse-1 (mouse-movement-p event)) | |
977 | (push event unread-command-events) | |
978 | (setq event oevent) | |
979 | (throw 'button-press-cancelled t)) | |
0fdbf6bc RS |
980 | (unless (or (integerp event) |
981 | (memq (car event) '(switch-frame select-window)) | |
982 | (eq (car event) 'scroll-bar-movement)) | |
983 | (setq pos (widget-event-point event)) | |
984 | (if (and pos | |
985 | (eq (get-char-property pos 'button) | |
986 | button)) | |
987 | (when face | |
988 | (overlay-put overlay 'face pressed-face) | |
989 | (overlay-put overlay 'mouse-face pressed-face)) | |
990 | (overlay-put overlay 'face face) | |
991 | (overlay-put overlay 'mouse-face mouse-face)))))) | |
bc7b6e08 CY |
992 | |
993 | ;; When mouse is released over the button, run | |
994 | ;; its action function. | |
b0c4ae71 CY |
995 | (when (and pos (eq (get-char-property pos 'button) button)) |
996 | (goto-char pos) | |
997 | (widget-apply-action button event) | |
998 | (if widget-button-click-moves-point | |
999 | (setq newpoint (point))))) | |
bc7b6e08 CY |
1000 | (overlay-put overlay 'face face) |
1001 | (overlay-put overlay 'mouse-face mouse-face)))) | |
1002 | ||
b0c4ae71 | 1003 | (if newpoint (goto-char newpoint)) |
bc7b6e08 CY |
1004 | ;; This loses if the widget action switches windows. -- cyd |
1005 | ;; (unless (pos-visible-in-window-p (widget-event-point event)) | |
1006 | ;; (mouse-set-point event) | |
1007 | ;; (beginning-of-line) | |
1008 | ;; (recenter)) | |
1009 | ) | |
1010 | nil)) | |
38c3526f RS |
1011 | (let ((up t) command) |
1012 | ;; Mouse click not on a widget button. Find the global | |
1013 | ;; command to run, and check whether it is bound to an | |
1014 | ;; up event. | |
bc7b6e08 | 1015 | (if mouse-1 |
bfa6c260 | 1016 | (cond ((setq command ;down event |
38c3526f | 1017 | (lookup-key widget-global-map [down-mouse-1])) |
bfa6c260 DL |
1018 | (setq up nil)) |
1019 | ((setq command ;up event | |
38c3526f RS |
1020 | (lookup-key widget-global-map [mouse-1])))) |
1021 | (cond ((setq command ;down event | |
1022 | (lookup-key widget-global-map [down-mouse-2])) | |
1023 | (setq up nil)) | |
1024 | ((setq command ;up event | |
1025 | (lookup-key widget-global-map [mouse-2]))))) | |
1026 | (when up | |
1027 | ;; Don't execute up events twice. | |
1028 | (while (not (widget-button-release-event-p event)) | |
1029 | (setq event (read-event)))) | |
1030 | (when command | |
1031 | (call-interactively command))))) | |
bfa6c260 | 1032 | (message "You clicked somewhere weird."))) |
a3c88c59 | 1033 | |
d543e20b | 1034 | (defun widget-button-press (pos &optional event) |
25ac13b5 | 1035 | "Invoke button at POS." |
d543e20b | 1036 | (interactive "@d") |
0a3a0b56 | 1037 | (let ((button (get-char-property pos 'button))) |
d543e20b PA |
1038 | (if button |
1039 | (widget-apply-action button event) | |
1040 | (let ((command (lookup-key widget-global-map (this-command-keys)))) | |
1041 | (when (commandp command) | |
1042 | (call-interactively command)))))) | |
1043 | ||
8697863a PA |
1044 | (defun widget-tabable-at (&optional pos) |
1045 | "Return the tabable widget at POS, or nil. | |
1046 | POS defaults to the value of (point)." | |
a850ac03 | 1047 | (let ((widget (widget-at pos))) |
8697863a PA |
1048 | (if widget |
1049 | (let ((order (widget-get widget :tab-order))) | |
1050 | (if order | |
1051 | (if (>= order 0) | |
bfa6c260 DL |
1052 | widget) |
1053 | widget))))) | |
8697863a | 1054 | |
35194e3f | 1055 | (defvar widget-use-overlay-change t |
4ee1cf9f | 1056 | "If non-nil, use overlay change functions to tab around in the buffer. |
35194e3f | 1057 | This is much faster, but doesn't work reliably on Emacs 19.34.") |
4ee1cf9f | 1058 | |
d543e20b PA |
1059 | (defun widget-move (arg) |
1060 | "Move point to the ARG next field or button. | |
1061 | ARG may be negative to move backward." | |
0a3a0b56 | 1062 | (or (bobp) (> arg 0) (backward-char)) |
ea13a2b4 | 1063 | (let ((wrapped 0) |
0a3a0b56 | 1064 | (number arg) |
407e43be | 1065 | (old (widget-tabable-at))) |
0a3a0b56 PA |
1066 | ;; Forward. |
1067 | (while (> arg 0) | |
4ee1cf9f | 1068 | (cond ((eobp) |
ea13a2b4 AS |
1069 | (goto-char (point-min)) |
1070 | (setq wrapped (1+ wrapped))) | |
4ee1cf9f PA |
1071 | (widget-use-overlay-change |
1072 | (goto-char (next-overlay-change (point)))) | |
1073 | (t | |
1074 | (forward-char 1))) | |
ea13a2b4 | 1075 | (and (= wrapped 2) |
0a3a0b56 PA |
1076 | (eq arg number) |
1077 | (error "No buttons or fields found")) | |
8697863a | 1078 | (let ((new (widget-tabable-at))) |
0a3a0b56 PA |
1079 | (when new |
1080 | (unless (eq new old) | |
8697863a | 1081 | (setq arg (1- arg)) |
0a3a0b56 PA |
1082 | (setq old new))))) |
1083 | ;; Backward. | |
1084 | (while (< arg 0) | |
4ee1cf9f | 1085 | (cond ((bobp) |
ea13a2b4 AS |
1086 | (goto-char (point-max)) |
1087 | (setq wrapped (1+ wrapped))) | |
4ee1cf9f PA |
1088 | (widget-use-overlay-change |
1089 | (goto-char (previous-overlay-change (point)))) | |
1090 | (t | |
1091 | (backward-char 1))) | |
ea13a2b4 | 1092 | (and (= wrapped 2) |
0a3a0b56 PA |
1093 | (eq arg number) |
1094 | (error "No buttons or fields found")) | |
8697863a | 1095 | (let ((new (widget-tabable-at))) |
0a3a0b56 PA |
1096 | (when new |
1097 | (unless (eq new old) | |
8697863a PA |
1098 | (setq arg (1+ arg)))))) |
1099 | (let ((new (widget-tabable-at))) | |
1100 | (while (eq (widget-tabable-at) new) | |
1101 | (backward-char))) | |
0ce5b5d5 PA |
1102 | (forward-char)) |
1103 | (widget-echo-help (point)) | |
1104 | (run-hooks 'widget-move-hook)) | |
d543e20b PA |
1105 | |
1106 | (defun widget-forward (arg) | |
1107 | "Move point to the next field or button. | |
1108 | With optional ARG, move across that many fields." | |
1109 | (interactive "p") | |
1110 | (run-hooks 'widget-forward-hook) | |
1111 | (widget-move arg)) | |
1112 | ||
1113 | (defun widget-backward (arg) | |
1114 | "Move point to the previous field or button. | |
1115 | With optional ARG, move across that many fields." | |
1116 | (interactive "p") | |
1117 | (run-hooks 'widget-backward-hook) | |
1118 | (widget-move (- arg))) | |
1119 | ||
8b9a0f45 | 1120 | ;; Since the widget code uses a `field' property to identify fields, |
0697c662 | 1121 | ;; ordinary beginning-of-line does the right thing. |
8b9a0f45 | 1122 | (defalias 'widget-beginning-of-line 'beginning-of-line) |
0697c662 MB |
1123 | |
1124 | (defun widget-end-of-line () | |
1125 | "Go to end of field or end of line, whichever is first. | |
1126 | Trailing spaces at the end of padded fields are not considered part of | |
1127 | the field." | |
1128 | (interactive) | |
1129 | ;; Ordinary end-of-line does the right thing, because we're inside | |
1130 | ;; text with a `field' property. | |
1131 | (end-of-line) | |
1132 | (unless (eolp) | |
1133 | ;; ... except that we want to ignore trailing spaces in fields that | |
1134 | ;; aren't terminated by a newline, because they are used as padding, | |
1135 | ;; and ignored when extracting the entered value of the field. | |
1136 | (skip-chars-backward " " (field-beginning (1- (point)))))) | |
d543e20b PA |
1137 | |
1138 | (defun widget-kill-line () | |
1139 | "Kill to end of field or end of line, whichever is first." | |
1140 | (interactive) | |
0ce5b5d5 | 1141 | (let* ((field (widget-field-find (point))) |
0ce5b5d5 | 1142 | (end (and field (widget-field-end field)))) |
7fdbdbea | 1143 | (if (and field (> (line-beginning-position 2) end)) |
0ce5b5d5 | 1144 | (kill-region (point) end) |
d543e20b PA |
1145 | (call-interactively 'kill-line)))) |
1146 | ||
0ce5b5d5 PA |
1147 | (defcustom widget-complete-field (lookup-key global-map "\M-\t") |
1148 | "Default function to call for completion inside fields." | |
1149 | :options '(ispell-complete-word complete-tag lisp-complete-symbol) | |
1150 | :type 'function | |
1151 | :group 'widgets) | |
1152 | ||
301f9235 | 1153 | (defun widget-narrow-to-field () |
00d00aa9 | 1154 | "Narrow to field." |
301f9235 EZ |
1155 | (interactive) |
1156 | (let ((field (widget-field-find (point)))) | |
1157 | (if field | |
1158 | (narrow-to-region (line-beginning-position) (line-end-position))))) | |
1159 | ||
0ce5b5d5 PA |
1160 | (defun widget-complete () |
1161 | "Complete content of editable field from point. | |
1162 | When not inside a field, move to the previous button or field." | |
1163 | (interactive) | |
1164 | (let ((field (widget-field-find (point)))) | |
1165 | (if field | |
301f9235 EZ |
1166 | (save-restriction |
1167 | (widget-narrow-to-field) | |
1168 | (widget-apply field :complete)) | |
1169 | (error "Not in an editable field")))) | |
0ce5b5d5 | 1170 | |
d543e20b PA |
1171 | ;;; Setting up the buffer. |
1172 | ||
7c0a9c8f SM |
1173 | (defvar widget-field-new nil |
1174 | "List of all newly created editable fields in the buffer.") | |
d543e20b PA |
1175 | (make-variable-buffer-local 'widget-field-new) |
1176 | ||
7c0a9c8f SM |
1177 | (defvar widget-field-list nil |
1178 | "List of all editable fields in the buffer.") | |
d543e20b PA |
1179 | (make-variable-buffer-local 'widget-field-list) |
1180 | ||
a850ac03 MB |
1181 | (defun widget-at (&optional pos) |
1182 | "The button or field at POS (default, point)." | |
1183 | (or (get-char-property (or pos (point)) 'button) | |
1184 | (widget-field-at pos))) | |
1185 | ||
0e520006 | 1186 | ;;;###autoload |
d543e20b PA |
1187 | (defun widget-setup () |
1188 | "Setup current buffer so editing string widgets works." | |
1189 | (let ((inhibit-read-only t) | |
7fdbdbea | 1190 | (inhibit-modification-hooks t) |
d543e20b PA |
1191 | field) |
1192 | (while widget-field-new | |
1193 | (setq field (car widget-field-new) | |
1194 | widget-field-new (cdr widget-field-new) | |
1195 | widget-field-list (cons field widget-field-list)) | |
0a3a0b56 PA |
1196 | (let ((from (car (widget-get field :field-overlay))) |
1197 | (to (cdr (widget-get field :field-overlay)))) | |
bfa6c260 | 1198 | (widget-specify-field field |
6aaedd12 | 1199 | (marker-position from) (marker-position to)) |
0a3a0b56 PA |
1200 | (set-marker from nil) |
1201 | (set-marker to nil)))) | |
d543e20b | 1202 | (widget-clear-undo) |
4ee1cf9f | 1203 | (widget-add-change)) |
d543e20b PA |
1204 | |
1205 | (defvar widget-field-last nil) | |
1206 | ;; Last field containing point. | |
1207 | (make-variable-buffer-local 'widget-field-last) | |
1208 | ||
1209 | (defvar widget-field-was nil) | |
1210 | ;; The widget data before the change. | |
1211 | (make-variable-buffer-local 'widget-field-was) | |
1212 | ||
a850ac03 MB |
1213 | (defun widget-field-at (pos) |
1214 | "Return the widget field at POS, or nil if none." | |
1215 | (let ((field (get-char-property (or pos (point)) 'field))) | |
1216 | (if (eq field 'boundary) | |
263a40a6 | 1217 | (get-char-property (or pos (point)) 'real-field) |
a850ac03 MB |
1218 | field))) |
1219 | ||
0a3a0b56 | 1220 | (defun widget-field-buffer (widget) |
80a7a1bf | 1221 | "Return the buffer of WIDGET's editing field." |
6aaedd12 | 1222 | (let ((overlay (widget-get widget :field-overlay))) |
ec725166 MB |
1223 | (cond ((overlayp overlay) |
1224 | (overlay-buffer overlay)) | |
1225 | ((consp overlay) | |
1226 | (marker-buffer (car overlay)))))) | |
0a3a0b56 PA |
1227 | |
1228 | (defun widget-field-start (widget) | |
1229 | "Return the start of WIDGET's editing field." | |
6aaedd12 | 1230 | (let ((overlay (widget-get widget :field-overlay))) |
ec725166 MB |
1231 | (if (overlayp overlay) |
1232 | (overlay-start overlay) | |
1233 | (car overlay)))) | |
0a3a0b56 PA |
1234 | |
1235 | (defun widget-field-end (widget) | |
1236 | "Return the end of WIDGET's editing field." | |
6aaedd12 | 1237 | (let ((overlay (widget-get widget :field-overlay))) |
a850ac03 MB |
1238 | ;; Don't subtract one if local-map works at the end of the overlay, |
1239 | ;; or if a special `boundary' field has been added after the widget | |
1240 | ;; field. | |
ec725166 | 1241 | (if (overlayp overlay) |
e47f89f0 EZ |
1242 | ;; Don't proceed if overlay has been removed from buffer. |
1243 | (when (overlay-buffer overlay) | |
1244 | (if (and (not (eq (with-current-buffer | |
1245 | (widget-field-buffer widget) | |
1246 | (save-restriction | |
1247 | ;; `widget-narrow-to-field' can be | |
1248 | ;; active when this function is called | |
1249 | ;; from an change-functions hook. So | |
1250 | ;; temporarily remove field narrowing | |
1251 | ;; before to call `get-char-property'. | |
1252 | (widen) | |
1253 | (get-char-property (overlay-end overlay) | |
1254 | 'field))) | |
1255 | 'boundary)) | |
1256 | (or widget-field-add-space | |
1257 | (null (widget-get widget :size)))) | |
1258 | (1- (overlay-end overlay)) | |
1259 | (overlay-end overlay))) | |
ec725166 | 1260 | (cdr overlay)))) |
0a3a0b56 | 1261 | |
d543e20b | 1262 | (defun widget-field-find (pos) |
0a3a0b56 | 1263 | "Return the field at POS. |
00d00aa9 | 1264 | Unlike (get-char-property POS 'field), this works with empty fields too." |
d543e20b PA |
1265 | (let ((fields widget-field-list) |
1266 | field found) | |
1267 | (while fields | |
1268 | (setq field (car fields) | |
1269 | fields (cdr fields)) | |
7fdbdbea DL |
1270 | (when (and (<= (widget-field-start field) pos) |
1271 | (<= pos (widget-field-end field))) | |
1272 | (when found | |
1273 | (error "Overlapping fields")) | |
1274 | (setq found field))) | |
d543e20b PA |
1275 | found)) |
1276 | ||
4ee1cf9f | 1277 | (defun widget-before-change (from to) |
944c91b6 PA |
1278 | ;; This is how, for example, a variable changes its state to `modified'. |
1279 | ;; when it is being edited. | |
540a8bd2 RS |
1280 | (unless inhibit-read-only |
1281 | (let ((from-field (widget-field-find from)) | |
1282 | (to-field (widget-field-find to))) | |
1283 | (cond ((not (eq from-field to-field)) | |
1284 | (add-hook 'post-command-hook 'widget-add-change nil t) | |
808bcfd2 KH |
1285 | (signal 'text-read-only |
1286 | '("Change should be restricted to a single field"))) | |
540a8bd2 RS |
1287 | ((null from-field) |
1288 | (add-hook 'post-command-hook 'widget-add-change nil t) | |
808bcfd2 KH |
1289 | (signal 'text-read-only |
1290 | '("Attempt to change text outside editable field"))) | |
540a8bd2 | 1291 | (widget-field-use-before-change |
7fdbdbea | 1292 | (widget-apply from-field :notify from-field)))))) |
4ee1cf9f PA |
1293 | |
1294 | (defun widget-add-change () | |
4ee1cf9f | 1295 | (remove-hook 'post-command-hook 'widget-add-change t) |
4ee1cf9f | 1296 | (add-hook 'before-change-functions 'widget-before-change nil t) |
4ee1cf9f | 1297 | (add-hook 'after-change-functions 'widget-after-change nil t)) |
c6753d66 | 1298 | |
d543e20b | 1299 | (defun widget-after-change (from to old) |
bfa6c260 | 1300 | "Adjust field size and text properties." |
7fdbdbea DL |
1301 | (let ((field (widget-field-find from)) |
1302 | (other (widget-field-find to))) | |
1303 | (when field | |
1304 | (unless (eq field other) | |
1305 | (error "Change in different fields")) | |
1306 | (let ((size (widget-get field :size))) | |
1307 | (when size | |
1308 | (let ((begin (widget-field-start field)) | |
1309 | (end (widget-field-end field))) | |
1310 | (cond ((< (- end begin) size) | |
1311 | ;; Field too small. | |
1312 | (save-excursion | |
1313 | (goto-char end) | |
00d00aa9 | 1314 | (insert-char ?\s (- (+ begin size) end)))) |
7fdbdbea DL |
1315 | ((> (- end begin) size) |
1316 | ;; Field too large and | |
1317 | (if (or (< (point) (+ begin size)) | |
1318 | (> (point) end)) | |
1319 | ;; Point is outside extra space. | |
1320 | (setq begin (+ begin size)) | |
1321 | ;; Point is within the extra space. | |
1322 | (setq begin (point))) | |
1323 | (save-excursion | |
1324 | (goto-char end) | |
00d00aa9 | 1325 | (while (and (eq (preceding-char) ?\s) |
7fdbdbea DL |
1326 | (> (point) begin)) |
1327 | (delete-backward-char 1))))))) | |
1328 | (widget-specify-secret field)) | |
1329 | (widget-apply field :notify field)))) | |
d543e20b PA |
1330 | |
1331 | ;;; Widget Functions | |
1332 | ;; | |
bfa6c260 | 1333 | ;; These functions are used in the definition of multiple widgets. |
d543e20b | 1334 | |
a3c88c59 PA |
1335 | (defun widget-parent-action (widget &optional event) |
1336 | "Tell :parent of WIDGET to handle the :action. | |
1337 | Optional EVENT is the event that triggered the action." | |
1338 | (widget-apply (widget-get widget :parent) :action event)) | |
1339 | ||
d543e20b PA |
1340 | (defun widget-children-value-delete (widget) |
1341 | "Delete all :children and :buttons in WIDGET." | |
bfa6c260 | 1342 | (mapc 'widget-delete (widget-get widget :children)) |
d543e20b | 1343 | (widget-put widget :children nil) |
bfa6c260 | 1344 | (mapc 'widget-delete (widget-get widget :buttons)) |
d543e20b PA |
1345 | (widget-put widget :buttons nil)) |
1346 | ||
a3c88c59 PA |
1347 | (defun widget-children-validate (widget) |
1348 | "All the :children must be valid." | |
1349 | (let ((children (widget-get widget :children)) | |
1350 | child found) | |
1351 | (while (and children (not found)) | |
1352 | (setq child (car children) | |
1353 | children (cdr children) | |
1354 | found (widget-apply child :validate))) | |
1355 | found)) | |
1356 | ||
6b61353c KH |
1357 | (defun widget-child-value-get (widget) |
1358 | "Get the value of the first member of :children in WIDGET." | |
1359 | (widget-value (car (widget-get widget :children)))) | |
1360 | ||
1361 | (defun widget-child-value-inline (widget) | |
1362 | "Get the inline value of the first member of :children in WIDGET." | |
1363 | (widget-apply (car (widget-get widget :children)) :value-inline)) | |
1364 | ||
1365 | (defun widget-child-validate (widget) | |
1366 | "The result of validating the first member of :children in WIDGET." | |
1367 | (widget-apply (car (widget-get widget :children)) :validate)) | |
1368 | ||
1369 | (defun widget-type-value-create (widget) | |
1370 | "Convert and instantiate the value of the :type attribute of WIDGET. | |
1371 | Store the newly created widget in the :children attribute. | |
1372 | ||
1373 | The value of the :type attribute should be an unconverted widget type." | |
1374 | (let ((value (widget-get widget :value)) | |
1375 | (type (widget-get widget :type))) | |
0e726aa5 KS |
1376 | (widget-put widget :children |
1377 | (list (widget-create-child-value widget | |
6b61353c KH |
1378 | (widget-convert type) |
1379 | value))))) | |
1380 | ||
1381 | (defun widget-type-default-get (widget) | |
1382 | "Get default value from the :type attribute of WIDGET. | |
1383 | ||
1384 | The value of the :type attribute should be an unconverted widget type." | |
1385 | (widget-default-get (widget-convert (widget-get widget :type)))) | |
1386 | ||
1387 | (defun widget-type-match (widget value) | |
1388 | "Non-nil if the :type value of WIDGET matches VALUE. | |
1389 | ||
1390 | The value of the :type attribute should be an unconverted widget type." | |
1391 | (widget-apply (widget-convert (widget-get widget :type)) :match value)) | |
1392 | ||
4c2f559e PA |
1393 | (defun widget-types-copy (widget) |
1394 | "Copy :args as widget types in WIDGET." | |
1395 | (widget-put widget :args (mapcar 'widget-copy (widget-get widget :args))) | |
1396 | widget) | |
1397 | ||
aeba6f9a DL |
1398 | ;; Made defsubst to speed up face editor creation. |
1399 | (defsubst widget-types-convert-widget (widget) | |
d543e20b PA |
1400 | "Convert :args as widget types in WIDGET." |
1401 | (widget-put widget :args (mapcar 'widget-convert (widget-get widget :args))) | |
1402 | widget) | |
1403 | ||
a3c88c59 PA |
1404 | (defun widget-value-convert-widget (widget) |
1405 | "Initialize :value from :args in WIDGET." | |
1406 | (let ((args (widget-get widget :args))) | |
bfa6c260 | 1407 | (when args |
a3c88c59 PA |
1408 | (widget-put widget :value (car args)) |
1409 | ;; Don't convert :value here, as this is done in `widget-convert'. | |
1410 | ;; (widget-put widget :value (widget-apply widget | |
1411 | ;; :value-to-internal (car args))) | |
1412 | (widget-put widget :args nil))) | |
1413 | widget) | |
1414 | ||
1415 | (defun widget-value-value-get (widget) | |
1416 | "Return the :value property of WIDGET." | |
1417 | (widget-get widget :value)) | |
1418 | ||
d543e20b PA |
1419 | ;;; The `default' Widget. |
1420 | ||
1421 | (define-widget 'default nil | |
1422 | "Basic widget other widgets are derived from." | |
1423 | :value-to-internal (lambda (widget value) value) | |
1424 | :value-to-external (lambda (widget value) value) | |
25ac13b5 PA |
1425 | :button-prefix 'widget-button-prefix |
1426 | :button-suffix 'widget-button-suffix | |
bfa6c260 | 1427 | :complete 'widget-default-complete |
d543e20b PA |
1428 | :create 'widget-default-create |
1429 | :indent nil | |
1430 | :offset 0 | |
1431 | :format-handler 'widget-default-format-handler | |
77339a6e | 1432 | :button-face-get 'widget-default-button-face-get |
73e60f53 | 1433 | :mouse-face-get 'widget-default-mouse-face-get |
77339a6e | 1434 | :sample-face-get 'widget-default-sample-face-get |
d543e20b | 1435 | :delete 'widget-default-delete |
4c2f559e | 1436 | :copy 'identity |
d543e20b PA |
1437 | :value-set 'widget-default-value-set |
1438 | :value-inline 'widget-default-value-inline | |
6b61353c | 1439 | :value-delete 'ignore |
783824f5 | 1440 | :default-get 'widget-default-default-get |
d543e20b | 1441 | :menu-tag-get 'widget-default-menu-tag-get |
99f01612 | 1442 | :validate #'ignore |
d543e20b PA |
1443 | :active 'widget-default-active |
1444 | :activate 'widget-specify-active | |
1445 | :deactivate 'widget-default-deactivate | |
99f01612 | 1446 | :mouse-down-action #'ignore |
d543e20b | 1447 | :action 'widget-default-action |
6d528fc5 PA |
1448 | :notify 'widget-default-notify |
1449 | :prompt-value 'widget-default-prompt-value) | |
d543e20b | 1450 | |
0ce5b5d5 PA |
1451 | (defun widget-default-complete (widget) |
1452 | "Call the value of the :complete-function property of WIDGET. | |
48b0e82e | 1453 | If that does not exist, call the value of `widget-complete-field'." |
7fdbdbea DL |
1454 | (call-interactively (or (widget-get widget :complete-function) |
1455 | widget-complete-field))) | |
0ce5b5d5 | 1456 | |
d543e20b PA |
1457 | (defun widget-default-create (widget) |
1458 | "Create WIDGET at point in the current buffer." | |
1459 | (widget-specify-insert | |
1460 | (let ((from (point)) | |
d543e20b PA |
1461 | button-begin button-end |
1462 | sample-begin sample-end | |
1463 | doc-begin doc-end | |
1464 | value-pos) | |
1465 | (insert (widget-get widget :format)) | |
1466 | (goto-char from) | |
1467 | ;; Parse escapes in format. | |
1468 | (while (re-search-forward "%\\(.\\)" nil t) | |
7fdbdbea DL |
1469 | (let ((escape (char-after (match-beginning 1)))) |
1470 | (delete-backward-char 2) | |
d543e20b | 1471 | (cond ((eq escape ?%) |
bfa6c260 | 1472 | (insert ?%)) |
d543e20b | 1473 | ((eq escape ?\[) |
25ac13b5 | 1474 | (setq button-begin (point)) |
944c91b6 | 1475 | (insert (widget-get-indirect widget :button-prefix))) |
d543e20b | 1476 | ((eq escape ?\]) |
944c91b6 | 1477 | (insert (widget-get-indirect widget :button-suffix)) |
d543e20b PA |
1478 | (setq button-end (point))) |
1479 | ((eq escape ?\{) | |
1480 | (setq sample-begin (point))) | |
1481 | ((eq escape ?\}) | |
1482 | (setq sample-end (point))) | |
1483 | ((eq escape ?n) | |
1484 | (when (widget-get widget :indent) | |
bfa6c260 | 1485 | (insert ?\n) |
00d00aa9 | 1486 | (insert-char ?\s (widget-get widget :indent)))) |
d543e20b | 1487 | ((eq escape ?t) |
bfa6c260 | 1488 | (let ((image (widget-get widget :tag-glyph)) |
25ac13b5 | 1489 | (tag (widget-get widget :tag))) |
bfa6c260 DL |
1490 | (cond (image |
1491 | (widget-image-insert widget (or tag "image") image)) | |
25ac13b5 PA |
1492 | (tag |
1493 | (insert tag)) | |
1494 | (t | |
bfa6c260 DL |
1495 | (princ (widget-get widget :value) |
1496 | (current-buffer)))))) | |
d543e20b | 1497 | ((eq escape ?d) |
25ac13b5 PA |
1498 | (let ((doc (widget-get widget :doc))) |
1499 | (when doc | |
1500 | (setq doc-begin (point)) | |
1501 | (insert doc) | |
1502 | (while (eq (preceding-char) ?\n) | |
1503 | (delete-backward-char 1)) | |
bfa6c260 | 1504 | (insert ?\n) |
25ac13b5 | 1505 | (setq doc-end (point))))) |
4a1b7052 CY |
1506 | ((eq escape ?h) |
1507 | (widget-add-documentation-string-button widget)) | |
d543e20b PA |
1508 | ((eq escape ?v) |
1509 | (if (and button-begin (not button-end)) | |
1510 | (widget-apply widget :value-create) | |
1511 | (setq value-pos (point)))) | |
bfa6c260 | 1512 | (t |
d543e20b PA |
1513 | (widget-apply widget :format-handler escape))))) |
1514 | ;; Specify button, sample, and doc, and insert value. | |
1515 | (and button-begin button-end | |
1516 | (widget-specify-button widget button-begin button-end)) | |
1517 | (and sample-begin sample-end | |
1518 | (widget-specify-sample widget sample-begin sample-end)) | |
1519 | (and doc-begin doc-end | |
1520 | (widget-specify-doc widget doc-begin doc-end)) | |
1521 | (when value-pos | |
1522 | (goto-char value-pos) | |
1523 | (widget-apply widget :value-create))) | |
7fdbdbea DL |
1524 | (let ((from (point-min-marker)) |
1525 | (to (point-max-marker))) | |
3bff434b | 1526 | (set-marker-insertion-type from t) |
d543e20b PA |
1527 | (set-marker-insertion-type to nil) |
1528 | (widget-put widget :from from) | |
6d528fc5 PA |
1529 | (widget-put widget :to to))) |
1530 | (widget-clear-undo)) | |
d543e20b PA |
1531 | |
1532 | (defun widget-default-format-handler (widget escape) | |
4a1b7052 | 1533 | (error "Unknown escape `%c'" escape)) |
d543e20b PA |
1534 | |
1535 | (defun widget-default-button-face-get (widget) | |
1536 | ;; Use :button-face or widget-button-face | |
0b296dac RS |
1537 | (or (widget-get widget :button-face) |
1538 | (let ((parent (widget-get widget :parent))) | |
1539 | (if parent | |
1540 | (widget-apply parent :button-face-get) | |
2f477381 | 1541 | widget-button-face)))) |
d543e20b | 1542 | |
73e60f53 CY |
1543 | (defun widget-default-mouse-face-get (widget) |
1544 | ;; Use :mouse-face or widget-mouse-face | |
1545 | (or (widget-get widget :mouse-face) | |
1546 | (let ((parent (widget-get widget :parent))) | |
1547 | (if parent | |
1548 | (widget-apply parent :mouse-face-get) | |
1549 | widget-mouse-face)))) | |
1550 | ||
d543e20b PA |
1551 | (defun widget-default-sample-face-get (widget) |
1552 | ;; Use :sample-face. | |
1553 | (widget-get widget :sample-face)) | |
1554 | ||
1555 | (defun widget-default-delete (widget) | |
bfa6c260 | 1556 | "Remove widget from the buffer." |
d543e20b PA |
1557 | (let ((from (widget-get widget :from)) |
1558 | (to (widget-get widget :to)) | |
9097aeb7 PA |
1559 | (inactive-overlay (widget-get widget :inactive)) |
1560 | (button-overlay (widget-get widget :button-overlay)) | |
0f648ca2 | 1561 | (sample-overlay (widget-get widget :sample-overlay)) |
4ee1cf9f | 1562 | (doc-overlay (widget-get widget :doc-overlay)) |
7fdbdbea | 1563 | (inhibit-modification-hooks t) |
0a3a0b56 | 1564 | (inhibit-read-only t)) |
d543e20b | 1565 | (widget-apply widget :value-delete) |
6b61353c | 1566 | (widget-children-value-delete widget) |
9097aeb7 PA |
1567 | (when inactive-overlay |
1568 | (delete-overlay inactive-overlay)) | |
1569 | (when button-overlay | |
1570 | (delete-overlay button-overlay)) | |
0f648ca2 PA |
1571 | (when sample-overlay |
1572 | (delete-overlay sample-overlay)) | |
4ee1cf9f PA |
1573 | (when doc-overlay |
1574 | (delete-overlay doc-overlay)) | |
d543e20b PA |
1575 | (when (< from to) |
1576 | ;; Kludge: this doesn't need to be true for empty formats. | |
1577 | (delete-region from to)) | |
1578 | (set-marker from nil) | |
6d528fc5 PA |
1579 | (set-marker to nil)) |
1580 | (widget-clear-undo)) | |
d543e20b PA |
1581 | |
1582 | (defun widget-default-value-set (widget value) | |
bfa6c260 | 1583 | "Recreate widget with new value." |
d0acc4ea RS |
1584 | (let* ((old-pos (point)) |
1585 | (from (copy-marker (widget-get widget :from))) | |
1586 | (to (copy-marker (widget-get widget :to))) | |
1587 | (offset (if (and (<= from old-pos) (<= old-pos to)) | |
1588 | (if (>= old-pos (1- to)) | |
1589 | (- old-pos to 1) | |
1590 | (- old-pos from))))) | |
1591 | ;;??? Bug: this ought to insert the new value before deleting the old one, | |
bfa6c260 | 1592 | ;; so that markers on either side of the value automatically |
d0acc4ea RS |
1593 | ;; stay on the same side. -- rms. |
1594 | (save-excursion | |
1595 | (goto-char (widget-get widget :from)) | |
1596 | (widget-apply widget :delete) | |
1597 | (widget-put widget :value value) | |
1598 | (widget-apply widget :create)) | |
1599 | (if offset | |
1600 | (if (< offset 0) | |
1601 | (goto-char (+ (widget-get widget :to) offset 1)) | |
1602 | (goto-char (min (+ from offset) (1- (widget-get widget :to)))))))) | |
d543e20b PA |
1603 | |
1604 | (defun widget-default-value-inline (widget) | |
bfa6c260 | 1605 | "Wrap value in a list unless it is inline." |
d543e20b PA |
1606 | (if (widget-get widget :inline) |
1607 | (widget-value widget) | |
1608 | (list (widget-value widget)))) | |
1609 | ||
783824f5 | 1610 | (defun widget-default-default-get (widget) |
bfa6c260 | 1611 | "Get `:value'." |
783824f5 RS |
1612 | (widget-get widget :value)) |
1613 | ||
d543e20b | 1614 | (defun widget-default-menu-tag-get (widget) |
bfa6c260 | 1615 | "Use tag or value for menus." |
d543e20b PA |
1616 | (or (widget-get widget :menu-tag) |
1617 | (widget-get widget :tag) | |
1618 | (widget-princ-to-string (widget-get widget :value)))) | |
1619 | ||
1620 | (defun widget-default-active (widget) | |
4837b516 | 1621 | "Return t if this widget is active (user modifiable)." |
0640c647 GM |
1622 | (or (widget-get widget :always-active) |
1623 | (and (not (widget-get widget :inactive)) | |
1624 | (let ((parent (widget-get widget :parent))) | |
77339a6e | 1625 | (or (null parent) |
0640c647 | 1626 | (widget-apply parent :active)))))) |
d543e20b PA |
1627 | |
1628 | (defun widget-default-deactivate (widget) | |
1629 | "Make WIDGET inactive for user modifications." | |
1630 | (widget-specify-inactive widget | |
1631 | (widget-get widget :from) | |
1632 | (widget-get widget :to))) | |
1633 | ||
1634 | (defun widget-default-action (widget &optional event) | |
bfa6c260 | 1635 | "Notify the parent when a widget changes." |
d543e20b PA |
1636 | (let ((parent (widget-get widget :parent))) |
1637 | (when parent | |
1638 | (widget-apply parent :notify widget event)))) | |
1639 | ||
1640 | (defun widget-default-notify (widget child &optional event) | |
bfa6c260 | 1641 | "Pass notification to parent." |
d543e20b PA |
1642 | (widget-default-action widget event)) |
1643 | ||
6d528fc5 | 1644 | (defun widget-default-prompt-value (widget prompt value unbound) |
4a1b7052 | 1645 | "Read an arbitrary value." |
7fdbdbea | 1646 | (eval-minibuffer prompt)) |
6d528fc5 | 1647 | |
4a1b7052 CY |
1648 | (defun widget-docstring (widget) |
1649 | "Return the documentation string specificied by WIDGET, or nil if none. | |
1650 | If WIDGET has a `:doc' property, that specifies the documentation string. | |
1651 | Otherwise, try the `:documentation-property' property. If this | |
1652 | is a function, call it with the widget's value as an argument; if | |
1653 | it is a symbol, use this symbol together with the widget's value | |
1654 | as the argument to `documentation-property'." | |
1655 | (let ((doc (or (widget-get widget :doc) | |
1656 | (let ((doc-prop (widget-get widget :documentation-property)) | |
1657 | (value (widget-get widget :value))) | |
1658 | (cond ((functionp doc-prop) | |
1659 | (funcall doc-prop value)) | |
1660 | ((symbolp doc-prop) | |
1661 | (documentation-property value doc-prop))))))) | |
1662 | (when (and (stringp doc) (> (length doc) 0)) | |
1663 | ;; Remove any redundant `*' in the beginning. | |
1664 | (when (eq (aref doc 0) ?*) | |
1665 | (setq doc (substring doc 1))) | |
1666 | ;; Remove trailing newlines. | |
1667 | (when (string-match "\n+\\'" doc) | |
1668 | (setq doc (substring doc 0 (match-beginning 0)))) | |
1669 | doc))) | |
1670 | ||
d543e20b PA |
1671 | ;;; The `item' Widget. |
1672 | ||
1673 | (define-widget 'item 'default | |
1674 | "Constant items for inclusion in other widgets." | |
a3c88c59 | 1675 | :convert-widget 'widget-value-convert-widget |
d543e20b PA |
1676 | :value-create 'widget-item-value-create |
1677 | :value-delete 'ignore | |
a3c88c59 | 1678 | :value-get 'widget-value-value-get |
d543e20b PA |
1679 | :match 'widget-item-match |
1680 | :match-inline 'widget-item-match-inline | |
1681 | :action 'widget-item-action | |
1682 | :format "%t\n") | |
1683 | ||
d543e20b | 1684 | (defun widget-item-value-create (widget) |
bfa6c260 DL |
1685 | "Insert the printed representation of the value." |
1686 | (princ (widget-get widget :value) (current-buffer))) | |
d543e20b PA |
1687 | |
1688 | (defun widget-item-match (widget value) | |
1689 | ;; Match if the value is the same. | |
1690 | (equal (widget-get widget :value) value)) | |
1691 | ||
1692 | (defun widget-item-match-inline (widget values) | |
1693 | ;; Match if the value is the same. | |
1694 | (let ((value (widget-get widget :value))) | |
1695 | (and (listp value) | |
1696 | (<= (length value) (length values)) | |
e5dfabb4 | 1697 | (let ((head (widget-sublist values 0 (length value)))) |
d543e20b | 1698 | (and (equal head value) |
e5dfabb4 RS |
1699 | (cons head (widget-sublist values (length value)))))))) |
1700 | ||
1701 | (defun widget-sublist (list start &optional end) | |
1702 | "Return the sublist of LIST from START to END. | |
1703 | If END is omitted, it defaults to the length of LIST." | |
0a3a0b56 PA |
1704 | (if (> start 0) (setq list (nthcdr start list))) |
1705 | (if end | |
bfa6c260 | 1706 | (unless (<= end start) |
0a3a0b56 PA |
1707 | (setq list (copy-sequence list)) |
1708 | (setcdr (nthcdr (- end start 1) list) nil) | |
1709 | list) | |
1710 | (copy-sequence list))) | |
d543e20b PA |
1711 | |
1712 | (defun widget-item-action (widget &optional event) | |
1713 | ;; Just notify itself. | |
1714 | (widget-apply widget :notify widget event)) | |
1715 | ||
d543e20b PA |
1716 | ;;; The `push-button' Widget. |
1717 | ||
7fdbdbea | 1718 | ;; (defcustom widget-push-button-gui t |
80b709bc | 1719 | ;; "If non-nil, use GUI push buttons when available." |
7fdbdbea DL |
1720 | ;; :group 'widgets |
1721 | ;; :type 'boolean) | |
d543e20b PA |
1722 | |
1723 | ;; Cache already created GUI objects. | |
7fdbdbea | 1724 | ;; (defvar widget-push-button-cache nil) |
d543e20b | 1725 | |
25ac13b5 PA |
1726 | (defcustom widget-push-button-prefix "[" |
1727 | "String used as prefix for buttons." | |
1728 | :type 'string | |
1729 | :group 'widget-button) | |
1730 | ||
1731 | (defcustom widget-push-button-suffix "]" | |
1732 | "String used as suffix for buttons." | |
1733 | :type 'string | |
1734 | :group 'widget-button) | |
1735 | ||
d543e20b PA |
1736 | (define-widget 'push-button 'item |
1737 | "A pushable button." | |
25ac13b5 PA |
1738 | :button-prefix "" |
1739 | :button-suffix "" | |
d543e20b PA |
1740 | :value-create 'widget-push-button-value-create |
1741 | :format "%[%v%]") | |
1742 | ||
1743 | (defun widget-push-button-value-create (widget) | |
bfa6c260 | 1744 | "Insert text representing the `on' and `off' states." |
d543e20b PA |
1745 | (let* ((tag (or (widget-get widget :tag) |
1746 | (widget-get widget :value))) | |
da5ec617 | 1747 | (tag-glyph (widget-get widget :tag-glyph)) |
25ac13b5 | 1748 | (text (concat widget-push-button-prefix |
7fdbdbea DL |
1749 | tag widget-push-button-suffix))) |
1750 | (if tag-glyph | |
1751 | (widget-image-insert widget text tag-glyph) | |
1752 | (insert text)))) | |
d543e20b | 1753 | |
7fdbdbea DL |
1754 | ;; (defun widget-gui-action (widget) |
1755 | ;; "Apply :action for WIDGET." | |
1756 | ;; (widget-apply-action widget (this-command-keys))) | |
d543e20b PA |
1757 | |
1758 | ;;; The `link' Widget. | |
1759 | ||
25ac13b5 PA |
1760 | (defcustom widget-link-prefix "[" |
1761 | "String used as prefix for links." | |
1762 | :type 'string | |
1763 | :group 'widget-button) | |
1764 | ||
1765 | (defcustom widget-link-suffix "]" | |
1766 | "String used as suffix for links." | |
1767 | :type 'string | |
1768 | :group 'widget-button) | |
1769 | ||
d543e20b PA |
1770 | (define-widget 'link 'item |
1771 | "An embedded link." | |
25ac13b5 PA |
1772 | :button-prefix 'widget-link-prefix |
1773 | :button-suffix 'widget-link-suffix | |
23e33070 | 1774 | :follow-link 'mouse-face |
d543e20b | 1775 | :help-echo "Follow the link." |
25ac13b5 | 1776 | :format "%[%t%]") |
d543e20b PA |
1777 | |
1778 | ;;; The `info-link' Widget. | |
1779 | ||
1780 | (define-widget 'info-link 'link | |
1781 | "A link to an info file." | |
1782 | :action 'widget-info-link-action) | |
1783 | ||
1784 | (defun widget-info-link-action (widget &optional event) | |
1785 | "Open the info node specified by WIDGET." | |
7c0a9c8f | 1786 | (info (widget-value widget))) |
d543e20b PA |
1787 | |
1788 | ;;; The `url-link' Widget. | |
1789 | ||
1790 | (define-widget 'url-link 'link | |
1791 | "A link to an www page." | |
1792 | :action 'widget-url-link-action) | |
1793 | ||
1794 | (defun widget-url-link-action (widget &optional event) | |
00d00aa9 | 1795 | "Open the URL specified by WIDGET." |
af0f19d7 | 1796 | (browse-url (widget-value widget))) |
d543e20b | 1797 | |
a59b7025 KH |
1798 | ;;; The `function-link' Widget. |
1799 | ||
1800 | (define-widget 'function-link 'link | |
1801 | "A link to an Emacs function." | |
1802 | :action 'widget-function-link-action) | |
1803 | ||
1804 | (defun widget-function-link-action (widget &optional event) | |
1805 | "Show the function specified by WIDGET." | |
1806 | (describe-function (widget-value widget))) | |
1807 | ||
1808 | ;;; The `variable-link' Widget. | |
1809 | ||
1810 | (define-widget 'variable-link 'link | |
1811 | "A link to an Emacs variable." | |
1812 | :action 'widget-variable-link-action) | |
1813 | ||
1814 | (defun widget-variable-link-action (widget &optional event) | |
1815 | "Show the variable specified by WIDGET." | |
1816 | (describe-variable (widget-value widget))) | |
1817 | ||
62f44662 PA |
1818 | ;;; The `file-link' Widget. |
1819 | ||
1820 | (define-widget 'file-link 'link | |
1821 | "A link to a file." | |
1822 | :action 'widget-file-link-action) | |
1823 | ||
1824 | (defun widget-file-link-action (widget &optional event) | |
1825 | "Find the file specified by WIDGET." | |
1826 | (find-file (widget-value widget))) | |
1827 | ||
1828 | ;;; The `emacs-library-link' Widget. | |
1829 | ||
1830 | (define-widget 'emacs-library-link 'link | |
1831 | "A link to an Emacs Lisp library file." | |
1832 | :action 'widget-emacs-library-link-action) | |
1833 | ||
1834 | (defun widget-emacs-library-link-action (widget &optional event) | |
00d00aa9 | 1835 | "Find the Emacs library file specified by WIDGET." |
62f44662 PA |
1836 | (find-file (locate-library (widget-value widget)))) |
1837 | ||
4ee1cf9f | 1838 | ;;; The `emacs-commentary-link' Widget. |
77339a6e | 1839 | |
4ee1cf9f PA |
1840 | (define-widget 'emacs-commentary-link 'link |
1841 | "A link to Commentary in an Emacs Lisp library file." | |
1842 | :action 'widget-emacs-commentary-link-action) | |
77339a6e | 1843 | |
4ee1cf9f PA |
1844 | (defun widget-emacs-commentary-link-action (widget &optional event) |
1845 | "Find the Commentary section of the Emacs file specified by WIDGET." | |
1846 | (finder-commentary (widget-value widget))) | |
1847 | ||
d543e20b PA |
1848 | ;;; The `editable-field' Widget. |
1849 | ||
1850 | (define-widget 'editable-field 'default | |
3bff434b | 1851 | "An editable text field. |
10dbcdd7 | 1852 | Note: In an `editable-field' widget, the `%v' escape must be preceded |
3bff434b | 1853 | by some other text in the `:format' string (if specified)." |
a3c88c59 | 1854 | :convert-widget 'widget-value-convert-widget |
d543e20b PA |
1855 | :keymap widget-field-keymap |
1856 | :format "%v" | |
7fdbdbea | 1857 | :help-echo "M-TAB: complete field; RET: enter value" |
d543e20b | 1858 | :value "" |
a3c88c59 PA |
1859 | :prompt-internal 'widget-field-prompt-internal |
1860 | :prompt-history 'widget-field-history | |
1861 | :prompt-value 'widget-field-prompt-value | |
d543e20b PA |
1862 | :action 'widget-field-action |
1863 | :validate 'widget-field-validate | |
1864 | :valid-regexp "" | |
820d4181 | 1865 | :error "Field's value doesn't match allowed forms" |
d543e20b PA |
1866 | :value-create 'widget-field-value-create |
1867 | :value-delete 'widget-field-value-delete | |
1868 | :value-get 'widget-field-value-get | |
1869 | :match 'widget-field-match) | |
1870 | ||
a3c88c59 PA |
1871 | (defvar widget-field-history nil |
1872 | "History of field minibuffer edits.") | |
1873 | ||
1874 | (defun widget-field-prompt-internal (widget prompt initial history) | |
a3545af4 | 1875 | "Read string for WIDGET prompting with PROMPT. |
bfa6c260 DL |
1876 | INITIAL is the initial input and HISTORY is a symbol containing |
1877 | the earlier input." | |
a3c88c59 PA |
1878 | (read-string prompt initial history)) |
1879 | ||
1880 | (defun widget-field-prompt-value (widget prompt value unbound) | |
bfa6c260 | 1881 | "Prompt for a string." |
7fdbdbea DL |
1882 | (widget-apply widget |
1883 | :value-to-external | |
1884 | (widget-apply widget | |
1885 | :prompt-internal prompt | |
1886 | (unless unbound | |
1887 | (cons (widget-apply widget | |
1888 | :value-to-internal value) | |
1889 | 0)) | |
1890 | (widget-get widget :prompt-history)))) | |
d543e20b | 1891 | |
0b296dac | 1892 | (defvar widget-edit-functions nil) |
211c9fe9 | 1893 | |
d543e20b | 1894 | (defun widget-field-action (widget &optional event) |
bfa6c260 | 1895 | "Move to next field." |
f1231b8e | 1896 | (widget-forward 1) |
0b296dac | 1897 | (run-hook-with-args 'widget-edit-functions widget)) |
d543e20b PA |
1898 | |
1899 | (defun widget-field-validate (widget) | |
bfa6c260 | 1900 | "Valid if the content matches `:valid-regexp'." |
7fdbdbea DL |
1901 | (unless (string-match (widget-get widget :valid-regexp) |
1902 | (widget-apply widget :value-get)) | |
1903 | widget)) | |
d543e20b PA |
1904 | |
1905 | (defun widget-field-value-create (widget) | |
bfa6c260 | 1906 | "Create an editable text field." |
d543e20b PA |
1907 | (let ((size (widget-get widget :size)) |
1908 | (value (widget-get widget :value)) | |
0a3a0b56 | 1909 | (from (point)) |
c953515e PA |
1910 | ;; This is changed to a real overlay in `widget-setup'. We |
1911 | ;; need the end points to behave differently until | |
bfa6c260 | 1912 | ;; `widget-setup' is called. |
0a3a0b56 PA |
1913 | (overlay (cons (make-marker) (make-marker)))) |
1914 | (widget-put widget :field-overlay overlay) | |
d543e20b PA |
1915 | (insert value) |
1916 | (and size | |
1917 | (< (length value) size) | |
00d00aa9 | 1918 | (insert-char ?\s (- size (length value)))) |
d543e20b PA |
1919 | (unless (memq widget widget-field-list) |
1920 | (setq widget-field-new (cons widget widget-field-new))) | |
0a3a0b56 PA |
1921 | (move-marker (cdr overlay) (point)) |
1922 | (set-marker-insertion-type (cdr overlay) nil) | |
1923 | (when (null size) | |
1924 | (insert ?\n)) | |
1925 | (move-marker (car overlay) from) | |
1926 | (set-marker-insertion-type (car overlay) t))) | |
d543e20b PA |
1927 | |
1928 | (defun widget-field-value-delete (widget) | |
bfa6c260 | 1929 | "Remove the widget from the list of active editing fields." |
d543e20b | 1930 | (setq widget-field-list (delq widget widget-field-list)) |
ec725166 | 1931 | (setq widget-field-new (delq widget widget-field-new)) |
d543e20b | 1932 | ;; These are nil if the :format string doesn't contain `%v'. |
0a3a0b56 | 1933 | (let ((overlay (widget-get widget :field-overlay))) |
d8f02b91 | 1934 | (when (overlayp overlay) |
0a3a0b56 | 1935 | (delete-overlay overlay)))) |
d543e20b PA |
1936 | |
1937 | (defun widget-field-value-get (widget) | |
bfa6c260 | 1938 | "Return current text in editing field." |
0a3a0b56 PA |
1939 | (let ((from (widget-field-start widget)) |
1940 | (to (widget-field-end widget)) | |
1941 | (buffer (widget-field-buffer widget)) | |
d543e20b PA |
1942 | (size (widget-get widget :size)) |
1943 | (secret (widget-get widget :secret)) | |
1944 | (old (current-buffer))) | |
1945 | (if (and from to) | |
bfa6c260 | 1946 | (progn |
0a3a0b56 | 1947 | (set-buffer buffer) |
d543e20b PA |
1948 | (while (and size |
1949 | (not (zerop size)) | |
1950 | (> to from) | |
00d00aa9 | 1951 | (eq (char-after (1- to)) ?\s)) |
d543e20b PA |
1952 | (setq to (1- to))) |
1953 | (let ((result (buffer-substring-no-properties from to))) | |
1954 | (when secret | |
1955 | (let ((index 0)) | |
1956 | (while (< (+ from index) to) | |
1957 | (aset result index | |
0a3a0b56 | 1958 | (get-char-property (+ from index) 'secret)) |
d543e20b PA |
1959 | (setq index (1+ index))))) |
1960 | (set-buffer old) | |
1961 | result)) | |
1962 | (widget-get widget :value)))) | |
1963 | ||
1964 | (defun widget-field-match (widget value) | |
1965 | ;; Match any string. | |
1966 | (stringp value)) | |
1967 | ||
1968 | ;;; The `text' Widget. | |
1969 | ||
1970 | (define-widget 'text 'editable-field | |
7fce8d93 SM |
1971 | "A multiline text area." |
1972 | :keymap widget-text-keymap) | |
d543e20b PA |
1973 | |
1974 | ;;; The `menu-choice' Widget. | |
1975 | ||
1976 | (define-widget 'menu-choice 'default | |
1977 | "A menu of options." | |
1978 | :convert-widget 'widget-types-convert-widget | |
4c2f559e | 1979 | :copy 'widget-types-copy |
d543e20b PA |
1980 | :format "%[%t%]: %v" |
1981 | :case-fold t | |
1982 | :tag "choice" | |
1983 | :void '(item :format "invalid (%t)\n") | |
1984 | :value-create 'widget-choice-value-create | |
6b61353c KH |
1985 | :value-get 'widget-child-value-get |
1986 | :value-inline 'widget-child-value-inline | |
783824f5 | 1987 | :default-get 'widget-choice-default-get |
a3c88c59 | 1988 | :mouse-down-action 'widget-choice-mouse-down-action |
d543e20b PA |
1989 | :action 'widget-choice-action |
1990 | :error "Make a choice" | |
1991 | :validate 'widget-choice-validate | |
1992 | :match 'widget-choice-match | |
1993 | :match-inline 'widget-choice-match-inline) | |
1994 | ||
1995 | (defun widget-choice-value-create (widget) | |
bfa6c260 | 1996 | "Insert the first choice that matches the value." |
d543e20b PA |
1997 | (let ((value (widget-get widget :value)) |
1998 | (args (widget-get widget :args)) | |
4084d128 | 1999 | (explicit (widget-get widget :explicit-choice)) |
d543e20b | 2000 | current) |
25e3656c | 2001 | (if explicit |
4084d128 RS |
2002 | (progn |
2003 | ;; If the user specified the choice for this value, | |
25e3656c | 2004 | ;; respect that choice. |
4084d128 RS |
2005 | (widget-put widget :children (list (widget-create-child-value |
2006 | widget explicit value))) | |
25e3656c LT |
2007 | (widget-put widget :choice explicit) |
2008 | (widget-put widget :explicit-choice nil)) | |
4084d128 RS |
2009 | (while args |
2010 | (setq current (car args) | |
2011 | args (cdr args)) | |
2012 | (when (widget-apply current :match value) | |
2013 | (widget-put widget :children (list (widget-create-child-value | |
2014 | widget current value))) | |
2015 | (widget-put widget :choice current) | |
2016 | (setq args nil | |
2017 | current nil))) | |
2018 | (when current | |
2019 | (let ((void (widget-get widget :void))) | |
2020 | (widget-put widget :children (list (widget-create-child-and-convert | |
2021 | widget void :value value))) | |
2022 | (widget-put widget :choice void)))))) | |
d543e20b | 2023 | |
783824f5 RS |
2024 | (defun widget-choice-default-get (widget) |
2025 | ;; Get default for the first choice. | |
2026 | (widget-default-get (car (widget-get widget :args)))) | |
2027 | ||
a3c88c59 PA |
2028 | (defcustom widget-choice-toggle nil |
2029 | "If non-nil, a binary choice will just toggle between the values. | |
2030 | Otherwise, the user will explicitly have to choose between the values | |
25ac13b5 | 2031 | when he invoked the menu." |
a3c88c59 PA |
2032 | :type 'boolean |
2033 | :group 'widgets) | |
2034 | ||
2035 | (defun widget-choice-mouse-down-action (widget &optional event) | |
2036 | ;; Return non-nil if we need a menu. | |
2037 | (let ((args (widget-get widget :args)) | |
2038 | (old (widget-get widget :choice))) | |
e2c00a47 | 2039 | (cond ((not (display-popup-menus-p)) |
a3c88c59 PA |
2040 | ;; No place to pop up a menu. |
2041 | nil) | |
a3c88c59 PA |
2042 | ((< (length args) 2) |
2043 | ;; Empty or singleton list, just return the value. | |
2044 | nil) | |
2045 | ((> (length args) widget-menu-max-size) | |
2046 | ;; Too long, prompt. | |
2047 | nil) | |
2048 | ((> (length args) 2) | |
2049 | ;; Reasonable sized list, use menu. | |
2050 | t) | |
2051 | ((and widget-choice-toggle (memq old args)) | |
2052 | ;; We toggle. | |
2053 | nil) | |
2054 | (t | |
2055 | ;; Ask which of the two. | |
2056 | t)))) | |
2057 | ||
d543e20b PA |
2058 | (defun widget-choice-action (widget &optional event) |
2059 | ;; Make a choice. | |
2060 | (let ((args (widget-get widget :args)) | |
2061 | (old (widget-get widget :choice)) | |
2062 | (tag (widget-apply widget :menu-tag-get)) | |
2063 | (completion-ignore-case (widget-get widget :case-fold)) | |
4084d128 | 2064 | this-explicit |
d543e20b PA |
2065 | current choices) |
2066 | ;; Remember old value. | |
2067 | (if (and old (not (widget-apply widget :validate))) | |
2068 | (let* ((external (widget-value widget)) | |
2069 | (internal (widget-apply old :value-to-internal external))) | |
2070 | (widget-put old :value internal))) | |
2071 | ;; Find new choice. | |
2072 | (setq current | |
2073 | (cond ((= (length args) 0) | |
2074 | nil) | |
2075 | ((= (length args) 1) | |
2076 | (nth 0 args)) | |
a3c88c59 PA |
2077 | ((and widget-choice-toggle |
2078 | (= (length args) 2) | |
d543e20b PA |
2079 | (memq old args)) |
2080 | (if (eq old (nth 0 args)) | |
2081 | (nth 1 args) | |
2082 | (nth 0 args))) | |
2083 | (t | |
2084 | (while args | |
2085 | (setq current (car args) | |
2086 | args (cdr args)) | |
2087 | (setq choices | |
2088 | (cons (cons (widget-apply current :menu-tag-get) | |
2089 | current) | |
2090 | choices))) | |
4084d128 | 2091 | (setq this-explicit t) |
d543e20b | 2092 | (widget-choose tag (reverse choices) event)))) |
d0acc4ea | 2093 | (when current |
25e3656c LT |
2094 | ;; If this was an explicit user choice, record the choice, |
2095 | ;; so that widget-choice-value-create will respect it. | |
4084d128 | 2096 | (when this-explicit |
25e3656c | 2097 | (widget-put widget :explicit-choice current)) |
4c2f559e | 2098 | (widget-value-set widget (widget-default-get current)) |
d0acc4ea RS |
2099 | (widget-setup) |
2100 | (widget-apply widget :notify widget event))) | |
d4b8422f | 2101 | (run-hook-with-args 'widget-edit-functions widget)) |
d543e20b PA |
2102 | |
2103 | (defun widget-choice-validate (widget) | |
2104 | ;; Valid if we have made a valid choice. | |
7fdbdbea DL |
2105 | (if (eq (widget-get widget :void) (widget-get widget :choice)) |
2106 | widget | |
2107 | (widget-apply (car (widget-get widget :children)) :validate))) | |
d543e20b PA |
2108 | |
2109 | (defun widget-choice-match (widget value) | |
2110 | ;; Matches if one of the choices matches. | |
2111 | (let ((args (widget-get widget :args)) | |
2112 | current found) | |
2113 | (while (and args (not found)) | |
2114 | (setq current (car args) | |
2115 | args (cdr args) | |
2116 | found (widget-apply current :match value))) | |
2117 | found)) | |
2118 | ||
2119 | (defun widget-choice-match-inline (widget values) | |
2120 | ;; Matches if one of the choices matches. | |
2121 | (let ((args (widget-get widget :args)) | |
2122 | current found) | |
2123 | (while (and args (null found)) | |
2124 | (setq current (car args) | |
2125 | args (cdr args) | |
2126 | found (widget-match-inline current values))) | |
2127 | found)) | |
2128 | ||
2129 | ;;; The `toggle' Widget. | |
2130 | ||
2131 | (define-widget 'toggle 'item | |
2132 | "Toggle between two states." | |
2133 | :format "%[%v%]\n" | |
2134 | :value-create 'widget-toggle-value-create | |
2135 | :action 'widget-toggle-action | |
2136 | :match (lambda (widget value) t) | |
2137 | :on "on" | |
2138 | :off "off") | |
2139 | ||
2140 | (defun widget-toggle-value-create (widget) | |
bfa6c260 | 2141 | "Insert text representing the `on' and `off' states." |
d543e20b | 2142 | (if (widget-value widget) |
3058e436 | 2143 | (let ((image (widget-get widget :on-glyph))) |
805e9a05 | 2144 | (and (display-graphic-p) |
3058e436 MB |
2145 | (listp image) |
2146 | (not (eq (car image) 'image)) | |
2147 | (widget-put widget :on-glyph (setq image (eval image)))) | |
805e9a05 RS |
2148 | (widget-image-insert widget |
2149 | (widget-get widget :on) | |
3058e436 MB |
2150 | image)) |
2151 | (let ((image (widget-get widget :off-glyph))) | |
2152 | (and (display-graphic-p) | |
2153 | (listp image) | |
2154 | (not (eq (car image) 'image)) | |
2155 | (widget-put widget :off-glyph (setq image (eval image)))) | |
2156 | (widget-image-insert widget (widget-get widget :off) image)))) | |
d543e20b PA |
2157 | |
2158 | (defun widget-toggle-action (widget &optional event) | |
2159 | ;; Toggle value. | |
d0acc4ea RS |
2160 | (widget-value-set widget (not (widget-value widget))) |
2161 | (widget-apply widget :notify widget event) | |
d4b8422f | 2162 | (run-hook-with-args 'widget-edit-functions widget)) |
6d528fc5 | 2163 | |
d543e20b PA |
2164 | ;;; The `checkbox' Widget. |
2165 | ||
2166 | (define-widget 'checkbox 'toggle | |
2167 | "A checkbox toggle." | |
25ac13b5 PA |
2168 | :button-suffix "" |
2169 | :button-prefix "" | |
d543e20b PA |
2170 | :format "%[%v%]" |
2171 | :on "[X]" | |
35a7ac84 DL |
2172 | ;; We could probably do the same job as the images using single |
2173 | ;; space characters in a boxed face with a stretch specification to | |
2174 | ;; make them square. | |
8cf30128 KS |
2175 | :on-glyph '(create-image "\300\300\141\143\067\076\034\030" |
2176 | 'xbm t :width 8 :height 8 | |
805e9a05 | 2177 | :background "grey75" ; like default mode line |
b6715b9f | 2178 | :foreground "black" |
8cf30128 | 2179 | :relief -2 |
1ed74431 | 2180 | :ascent 'center) |
805e9a05 | 2181 | :off "[ ]" |
8cf30128 KS |
2182 | :off-glyph '(create-image (make-string 8 0) |
2183 | 'xbm t :width 8 :height 8 | |
805e9a05 RS |
2184 | :background "grey75" |
2185 | :foreground "black" | |
8cf30128 | 2186 | :relief -2 |
805e9a05 | 2187 | :ascent 'center) |
99f01612 | 2188 | :help-echo "Toggle this item." |
d543e20b PA |
2189 | :action 'widget-checkbox-action) |
2190 | ||
2191 | (defun widget-checkbox-action (widget &optional event) | |
2192 | "Toggle checkbox, notify parent, and set active state of sibling." | |
2193 | (widget-toggle-action widget event) | |
2194 | (let ((sibling (widget-get-sibling widget))) | |
2195 | (when sibling | |
2196 | (if (widget-value widget) | |
2197 | (widget-apply sibling :activate) | |
6872b31c EZ |
2198 | (widget-apply sibling :deactivate)) |
2199 | (widget-clear-undo)))) | |
d543e20b PA |
2200 | |
2201 | ;;; The `checklist' Widget. | |
2202 | ||
2203 | (define-widget 'checklist 'default | |
2204 | "A multiple choice widget." | |
2205 | :convert-widget 'widget-types-convert-widget | |
4c2f559e | 2206 | :copy 'widget-types-copy |
d543e20b PA |
2207 | :format "%v" |
2208 | :offset 4 | |
2209 | :entry-format "%b %v" | |
d543e20b PA |
2210 | :greedy nil |
2211 | :value-create 'widget-checklist-value-create | |
d543e20b PA |
2212 | :value-get 'widget-checklist-value-get |
2213 | :validate 'widget-checklist-validate | |
2214 | :match 'widget-checklist-match | |
2215 | :match-inline 'widget-checklist-match-inline) | |
2216 | ||
2217 | (defun widget-checklist-value-create (widget) | |
2218 | ;; Insert all values | |
2219 | (let ((alist (widget-checklist-match-find widget (widget-get widget :value))) | |
2220 | (args (widget-get widget :args))) | |
bfa6c260 | 2221 | (while args |
d543e20b PA |
2222 | (widget-checklist-add-item widget (car args) (assq (car args) alist)) |
2223 | (setq args (cdr args))) | |
2224 | (widget-put widget :children (nreverse (widget-get widget :children))))) | |
2225 | ||
2226 | (defun widget-checklist-add-item (widget type chosen) | |
bfa6c260 DL |
2227 | "Create checklist item in WIDGET of type TYPE. |
2228 | If the item is checked, CHOSEN is a cons whose cdr is the value." | |
d543e20b PA |
2229 | (and (eq (preceding-char) ?\n) |
2230 | (widget-get widget :indent) | |
00d00aa9 | 2231 | (insert-char ?\s (widget-get widget :indent))) |
bfa6c260 | 2232 | (widget-specify-insert |
d543e20b PA |
2233 | (let* ((children (widget-get widget :children)) |
2234 | (buttons (widget-get widget :buttons)) | |
2235 | (button-args (or (widget-get type :sibling-args) | |
2236 | (widget-get widget :button-args))) | |
2237 | (from (point)) | |
2238 | child button) | |
2239 | (insert (widget-get widget :entry-format)) | |
2240 | (goto-char from) | |
2241 | ;; Parse % escapes in format. | |
2242 | (while (re-search-forward "%\\([bv%]\\)" nil t) | |
7fdbdbea DL |
2243 | (let ((escape (char-after (match-beginning 1)))) |
2244 | (delete-backward-char 2) | |
d543e20b | 2245 | (cond ((eq escape ?%) |
bfa6c260 | 2246 | (insert ?%)) |
d543e20b PA |
2247 | ((eq escape ?b) |
2248 | (setq button (apply 'widget-create-child-and-convert | |
2249 | widget 'checkbox | |
2250 | :value (not (null chosen)) | |
2251 | button-args))) | |
2252 | ((eq escape ?v) | |
2253 | (setq child | |
2254 | (cond ((not chosen) | |
2255 | (let ((child (widget-create-child widget type))) | |
2256 | (widget-apply child :deactivate) | |
2257 | child)) | |
2258 | ((widget-get type :inline) | |
2259 | (widget-create-child-value | |
2260 | widget type (cdr chosen))) | |
2261 | (t | |
2262 | (widget-create-child-value | |
2263 | widget type (car (cdr chosen))))))) | |
bfa6c260 | 2264 | (t |
d543e20b PA |
2265 | (error "Unknown escape `%c'" escape))))) |
2266 | ;; Update properties. | |
2267 | (and button child (widget-put child :button button)) | |
2268 | (and button (widget-put widget :buttons (cons button buttons))) | |
2269 | (and child (widget-put widget :children (cons child children)))))) | |
2270 | ||
2271 | (defun widget-checklist-match (widget values) | |
2272 | ;; All values must match a type in the checklist. | |
2273 | (and (listp values) | |
2274 | (null (cdr (widget-checklist-match-inline widget values))))) | |
2275 | ||
2276 | (defun widget-checklist-match-inline (widget values) | |
2277 | ;; Find the values which match a type in the checklist. | |
2278 | (let ((greedy (widget-get widget :greedy)) | |
ef3f635f | 2279 | (args (copy-sequence (widget-get widget :args))) |
d543e20b PA |
2280 | found rest) |
2281 | (while values | |
2282 | (let ((answer (widget-checklist-match-up args values))) | |
bfa6c260 | 2283 | (cond (answer |
d543e20b PA |
2284 | (let ((vals (widget-match-inline answer values))) |
2285 | (setq found (append found (car vals)) | |
2286 | values (cdr vals) | |
2287 | args (delq answer args)))) | |
2288 | (greedy | |
2289 | (setq rest (append rest (list (car values))) | |
2290 | values (cdr values))) | |
bfa6c260 | 2291 | (t |
d543e20b PA |
2292 | (setq rest (append rest values) |
2293 | values nil))))) | |
2294 | (cons found rest))) | |
2295 | ||
2296 | (defun widget-checklist-match-find (widget vals) | |
bfa6c260 DL |
2297 | "Find the vals which match a type in the checklist. |
2298 | Return an alist of (TYPE MATCH)." | |
d543e20b | 2299 | (let ((greedy (widget-get widget :greedy)) |
ef3f635f | 2300 | (args (copy-sequence (widget-get widget :args))) |
d543e20b PA |
2301 | found) |
2302 | (while vals | |
2303 | (let ((answer (widget-checklist-match-up args vals))) | |
bfa6c260 | 2304 | (cond (answer |
d543e20b PA |
2305 | (let ((match (widget-match-inline answer vals))) |
2306 | (setq found (cons (cons answer (car match)) found) | |
2307 | vals (cdr match) | |
2308 | args (delq answer args)))) | |
2309 | (greedy | |
2310 | (setq vals (cdr vals))) | |
bfa6c260 | 2311 | (t |
d543e20b PA |
2312 | (setq vals nil))))) |
2313 | found)) | |
2314 | ||
2315 | (defun widget-checklist-match-up (args vals) | |
bfa6c260 | 2316 | "Return the first type from ARGS that matches VALS." |
d543e20b PA |
2317 | (let (current found) |
2318 | (while (and args (null found)) | |
2319 | (setq current (car args) | |
2320 | args (cdr args) | |
2321 | found (widget-match-inline current vals))) | |
2322 | (if found | |
bfa6c260 | 2323 | current))) |
d543e20b PA |
2324 | |
2325 | (defun widget-checklist-value-get (widget) | |
2326 | ;; The values of all selected items. | |
2327 | (let ((children (widget-get widget :children)) | |
2328 | child result) | |
bfa6c260 | 2329 | (while children |
d543e20b PA |
2330 | (setq child (car children) |
2331 | children (cdr children)) | |
2332 | (if (widget-value (widget-get child :button)) | |
2333 | (setq result (append result (widget-apply child :value-inline))))) | |
2334 | result)) | |
2335 | ||
2336 | (defun widget-checklist-validate (widget) | |
2337 | ;; Ticked chilren must be valid. | |
2338 | (let ((children (widget-get widget :children)) | |
2339 | child button found) | |
2340 | (while (and children (not found)) | |
2341 | (setq child (car children) | |
2342 | children (cdr children) | |
2343 | button (widget-get child :button) | |
2344 | found (and (widget-value button) | |
2345 | (widget-apply child :validate)))) | |
2346 | found)) | |
2347 | ||
2348 | ;;; The `option' Widget | |
2349 | ||
2350 | (define-widget 'option 'checklist | |
2351 | "An widget with an optional item." | |
2352 | :inline t) | |
2353 | ||
2354 | ;;; The `choice-item' Widget. | |
2355 | ||
2356 | (define-widget 'choice-item 'item | |
2357 | "Button items that delegate action events to their parents." | |
a3c88c59 | 2358 | :action 'widget-parent-action |
d543e20b PA |
2359 | :format "%[%t%] \n") |
2360 | ||
d543e20b PA |
2361 | ;;; The `radio-button' Widget. |
2362 | ||
2363 | (define-widget 'radio-button 'toggle | |
2364 | "A radio button for use in the `radio' widget." | |
2365 | :notify 'widget-radio-button-notify | |
2366 | :format "%[%v%]" | |
25ac13b5 PA |
2367 | :button-suffix "" |
2368 | :button-prefix "" | |
d543e20b PA |
2369 | :on "(*)" |
2370 | :on-glyph "radio1" | |
2371 | :off "( )" | |
2372 | :off-glyph "radio0") | |
2373 | ||
2374 | (defun widget-radio-button-notify (widget child &optional event) | |
2375 | ;; Tell daddy. | |
2376 | (widget-apply (widget-get widget :parent) :action widget event)) | |
2377 | ||
2378 | ;;; The `radio-button-choice' Widget. | |
2379 | ||
2380 | (define-widget 'radio-button-choice 'default | |
2381 | "Select one of multiple options." | |
2382 | :convert-widget 'widget-types-convert-widget | |
4c2f559e | 2383 | :copy 'widget-types-copy |
d543e20b PA |
2384 | :offset 4 |
2385 | :format "%v" | |
2386 | :entry-format "%b %v" | |
d543e20b | 2387 | :value-create 'widget-radio-value-create |
d543e20b PA |
2388 | :value-get 'widget-radio-value-get |
2389 | :value-inline 'widget-radio-value-inline | |
2390 | :value-set 'widget-radio-value-set | |
2391 | :error "You must push one of the buttons" | |
2392 | :validate 'widget-radio-validate | |
2393 | :match 'widget-choice-match | |
2394 | :match-inline 'widget-choice-match-inline | |
2395 | :action 'widget-radio-action) | |
2396 | ||
2397 | (defun widget-radio-value-create (widget) | |
2398 | ;; Insert all values | |
2399 | (let ((args (widget-get widget :args)) | |
2400 | arg) | |
bfa6c260 | 2401 | (while args |
d543e20b PA |
2402 | (setq arg (car args) |
2403 | args (cdr args)) | |
2404 | (widget-radio-add-item widget arg)))) | |
2405 | ||
2406 | (defun widget-radio-add-item (widget type) | |
2407 | "Add to radio widget WIDGET a new radio button item of type TYPE." | |
2408 | ;; (setq type (widget-convert type)) | |
2409 | (and (eq (preceding-char) ?\n) | |
2410 | (widget-get widget :indent) | |
00d00aa9 | 2411 | (insert-char ?\s (widget-get widget :indent))) |
bfa6c260 | 2412 | (widget-specify-insert |
d543e20b PA |
2413 | (let* ((value (widget-get widget :value)) |
2414 | (children (widget-get widget :children)) | |
2415 | (buttons (widget-get widget :buttons)) | |
2416 | (button-args (or (widget-get type :sibling-args) | |
2417 | (widget-get widget :button-args))) | |
2418 | (from (point)) | |
2419 | (chosen (and (null (widget-get widget :choice)) | |
2420 | (widget-apply type :match value))) | |
2421 | child button) | |
2422 | (insert (widget-get widget :entry-format)) | |
2423 | (goto-char from) | |
2424 | ;; Parse % escapes in format. | |
2425 | (while (re-search-forward "%\\([bv%]\\)" nil t) | |
7fdbdbea DL |
2426 | (let ((escape (char-after (match-beginning 1)))) |
2427 | (delete-backward-char 2) | |
d543e20b | 2428 | (cond ((eq escape ?%) |
bfa6c260 | 2429 | (insert ?%)) |
d543e20b PA |
2430 | ((eq escape ?b) |
2431 | (setq button (apply 'widget-create-child-and-convert | |
bfa6c260 | 2432 | widget 'radio-button |
d543e20b PA |
2433 | :value (not (null chosen)) |
2434 | button-args))) | |
2435 | ((eq escape ?v) | |
2436 | (setq child (if chosen | |
2437 | (widget-create-child-value | |
2438 | widget type value) | |
2439 | (widget-create-child widget type))) | |
bfa6c260 | 2440 | (unless chosen |
d543e20b | 2441 | (widget-apply child :deactivate))) |
bfa6c260 | 2442 | (t |
d543e20b PA |
2443 | (error "Unknown escape `%c'" escape))))) |
2444 | ;; Update properties. | |
2445 | (when chosen | |
2446 | (widget-put widget :choice type)) | |
bfa6c260 | 2447 | (when button |
d543e20b PA |
2448 | (widget-put child :button button) |
2449 | (widget-put widget :buttons (nconc buttons (list button)))) | |
2450 | (when child | |
2451 | (widget-put widget :children (nconc children (list child)))) | |
2452 | child))) | |
2453 | ||
2454 | (defun widget-radio-value-get (widget) | |
2455 | ;; Get value of the child widget. | |
2456 | (let ((chosen (widget-radio-chosen widget))) | |
2457 | (and chosen (widget-value chosen)))) | |
2458 | ||
2459 | (defun widget-radio-chosen (widget) | |
2460 | "Return the widget representing the chosen radio button." | |
2461 | (let ((children (widget-get widget :children)) | |
2462 | current found) | |
2463 | (while children | |
2464 | (setq current (car children) | |
2465 | children (cdr children)) | |
7fdbdbea DL |
2466 | (when (widget-apply (widget-get current :button) :value-get) |
2467 | (setq found current | |
2468 | children nil))) | |
d543e20b PA |
2469 | found)) |
2470 | ||
2471 | (defun widget-radio-value-inline (widget) | |
2472 | ;; Get value of the child widget. | |
2473 | (let ((children (widget-get widget :children)) | |
2474 | current found) | |
2475 | (while children | |
2476 | (setq current (car children) | |
2477 | children (cdr children)) | |
7fdbdbea DL |
2478 | (when (widget-apply (widget-get current :button) :value-get) |
2479 | (setq found (widget-apply current :value-inline) | |
2480 | children nil))) | |
d543e20b PA |
2481 | found)) |
2482 | ||
2483 | (defun widget-radio-value-set (widget value) | |
2484 | ;; We can't just delete and recreate a radio widget, since children | |
2485 | ;; can be added after the original creation and won't be recreated | |
2486 | ;; by `:create'. | |
2487 | (let ((children (widget-get widget :children)) | |
2488 | current found) | |
2489 | (while children | |
2490 | (setq current (car children) | |
2491 | children (cdr children)) | |
2492 | (let* ((button (widget-get current :button)) | |
2493 | (match (and (not found) | |
2494 | (widget-apply current :match value)))) | |
2495 | (widget-value-set button match) | |
bfa6c260 DL |
2496 | (if match |
2497 | (progn | |
d543e20b PA |
2498 | (widget-value-set current value) |
2499 | (widget-apply current :activate)) | |
2500 | (widget-apply current :deactivate)) | |
2501 | (setq found (or found match)))))) | |
2502 | ||
2503 | (defun widget-radio-validate (widget) | |
2504 | ;; Valid if we have made a valid choice. | |
2505 | (let ((children (widget-get widget :children)) | |
2506 | current found button) | |
2507 | (while (and children (not found)) | |
2508 | (setq current (car children) | |
2509 | children (cdr children) | |
2510 | button (widget-get current :button) | |
2511 | found (widget-apply button :value-get))) | |
2512 | (if found | |
2513 | (widget-apply current :validate) | |
2514 | widget))) | |
2515 | ||
2516 | (defun widget-radio-action (widget child event) | |
2517 | ;; Check if a radio button was pressed. | |
2518 | (let ((children (widget-get widget :children)) | |
2519 | (buttons (widget-get widget :buttons)) | |
2520 | current) | |
2521 | (when (memq child buttons) | |
2522 | (while children | |
2523 | (setq current (car children) | |
2524 | children (cdr children)) | |
2525 | (let* ((button (widget-get current :button))) | |
2526 | (cond ((eq child button) | |
2527 | (widget-value-set button t) | |
2528 | (widget-apply current :activate)) | |
2529 | ((widget-value button) | |
2530 | (widget-value-set button nil) | |
2531 | (widget-apply current :deactivate))))))) | |
2532 | ;; Pass notification to parent. | |
2533 | (widget-apply widget :notify child event)) | |
2534 | ||
2535 | ;;; The `insert-button' Widget. | |
2536 | ||
2537 | (define-widget 'insert-button 'push-button | |
2ff864e0 DL |
2538 | "An insert button for the `editable-list' widget." |
2539 | :tag "INS" | |
2540 | :help-echo "Insert a new item into the list at this position." | |
d543e20b PA |
2541 | :action 'widget-insert-button-action) |
2542 | ||
2543 | (defun widget-insert-button-action (widget &optional event) | |
2544 | ;; Ask the parent to insert a new item. | |
bfa6c260 | 2545 | (widget-apply (widget-get widget :parent) |
d543e20b PA |
2546 | :insert-before (widget-get widget :widget))) |
2547 | ||
2ff864e0 DL |
2548 | ;;; The `delete-button' Widget. |
2549 | ||
2550 | (define-widget 'delete-button 'push-button | |
2551 | "A delete button for the `editable-list' widget." | |
2552 | :tag "DEL" | |
2553 | :help-echo "Delete this item from the list." | |
2554 | :action 'widget-delete-button-action) | |
2555 | ||
2556 | (defun widget-delete-button-action (widget &optional event) | |
2557 | ;; Ask the parent to insert a new item. | |
2558 | (widget-apply (widget-get widget :parent) | |
2559 | :delete-at (widget-get widget :widget))) | |
2560 | ||
d543e20b PA |
2561 | ;;; The `editable-list' Widget. |
2562 | ||
7fdbdbea | 2563 | ;; (defcustom widget-editable-list-gui nil |
80b709bc | 2564 | ;; "If non-nil, use GUI push-buttons in editable list when available." |
7fdbdbea DL |
2565 | ;; :type 'boolean |
2566 | ;; :group 'widgets) | |
d543e20b PA |
2567 | |
2568 | (define-widget 'editable-list 'default | |
2569 | "A variable list of widgets of the same type." | |
2570 | :convert-widget 'widget-types-convert-widget | |
4c2f559e | 2571 | :copy 'widget-types-copy |
d543e20b PA |
2572 | :offset 12 |
2573 | :format "%v%i\n" | |
2574 | :format-handler 'widget-editable-list-format-handler | |
2ff864e0 | 2575 | :entry-format "%i %d %v" |
d543e20b | 2576 | :value-create 'widget-editable-list-value-create |
d543e20b | 2577 | :value-get 'widget-editable-list-value-get |
a3c88c59 | 2578 | :validate 'widget-children-validate |
d543e20b PA |
2579 | :match 'widget-editable-list-match |
2580 | :match-inline 'widget-editable-list-match-inline | |
2581 | :insert-before 'widget-editable-list-insert-before | |
2582 | :delete-at 'widget-editable-list-delete-at) | |
2583 | ||
2584 | (defun widget-editable-list-format-handler (widget escape) | |
2585 | ;; We recognize the insert button. | |
407e43be | 2586 | ;; (let ((widget-push-button-gui widget-editable-list-gui)) |
d543e20b PA |
2587 | (cond ((eq escape ?i) |
2588 | (and (widget-get widget :indent) | |
00d00aa9 | 2589 | (insert-char ?\s (widget-get widget :indent))) |
bfa6c260 | 2590 | (apply 'widget-create-child-and-convert |
d543e20b PA |
2591 | widget 'insert-button |
2592 | (widget-get widget :append-button-args))) | |
bfa6c260 | 2593 | (t |
7fdbdbea | 2594 | (widget-default-format-handler widget escape))) |
407e43be | 2595 | ;; ) |
7fdbdbea | 2596 | ) |
d543e20b PA |
2597 | |
2598 | (defun widget-editable-list-value-create (widget) | |
2599 | ;; Insert all values | |
2600 | (let* ((value (widget-get widget :value)) | |
2601 | (type (nth 0 (widget-get widget :args))) | |
d543e20b PA |
2602 | children) |
2603 | (widget-put widget :value-pos (copy-marker (point))) | |
2604 | (set-marker-insertion-type (widget-get widget :value-pos) t) | |
2605 | (while value | |
2606 | (let ((answer (widget-match-inline type value))) | |
2607 | (if answer | |
2608 | (setq children (cons (widget-editable-list-entry-create | |
2609 | widget | |
7fdbdbea | 2610 | (if (widget-get type :inline) |
d543e20b PA |
2611 | (car answer) |
2612 | (car (car answer))) | |
2613 | t) | |
2614 | children) | |
2615 | value (cdr answer)) | |
2616 | (setq value nil)))) | |
2617 | (widget-put widget :children (nreverse children)))) | |
2618 | ||
2619 | (defun widget-editable-list-value-get (widget) | |
2620 | ;; Get value of the child widget. | |
2621 | (apply 'append (mapcar (lambda (child) (widget-apply child :value-inline)) | |
2622 | (widget-get widget :children)))) | |
2623 | ||
d543e20b PA |
2624 | (defun widget-editable-list-match (widget value) |
2625 | ;; Value must be a list and all the members must match the type. | |
2626 | (and (listp value) | |
2627 | (null (cdr (widget-editable-list-match-inline widget value))))) | |
2628 | ||
2629 | (defun widget-editable-list-match-inline (widget value) | |
2630 | (let ((type (nth 0 (widget-get widget :args))) | |
2631 | (ok t) | |
2632 | found) | |
2633 | (while (and value ok) | |
2634 | (let ((answer (widget-match-inline type value))) | |
bfa6c260 | 2635 | (if answer |
d543e20b PA |
2636 | (setq found (append found (car answer)) |
2637 | value (cdr answer)) | |
2638 | (setq ok nil)))) | |
2639 | (cons found value))) | |
2640 | ||
2641 | (defun widget-editable-list-insert-before (widget before) | |
2642 | ;; Insert a new child in the list of children. | |
2643 | (save-excursion | |
2644 | (let ((children (widget-get widget :children)) | |
2645 | (inhibit-read-only t) | |
c6753d66 | 2646 | before-change-functions |
d543e20b | 2647 | after-change-functions) |
bfa6c260 | 2648 | (cond (before |
d543e20b PA |
2649 | (goto-char (widget-get before :entry-from))) |
2650 | (t | |
2651 | (goto-char (widget-get widget :value-pos)))) | |
bfa6c260 | 2652 | (let ((child (widget-editable-list-entry-create |
d543e20b PA |
2653 | widget nil nil))) |
2654 | (when (< (widget-get child :entry-from) (widget-get widget :from)) | |
2655 | (set-marker (widget-get widget :from) | |
2656 | (widget-get child :entry-from))) | |
d543e20b PA |
2657 | (if (eq (car children) before) |
2658 | (widget-put widget :children (cons child children)) | |
2659 | (while (not (eq (car (cdr children)) before)) | |
2660 | (setq children (cdr children))) | |
2661 | (setcdr children (cons child (cdr children))))))) | |
2662 | (widget-setup) | |
0a3a0b56 | 2663 | (widget-apply widget :notify widget)) |
d543e20b PA |
2664 | |
2665 | (defun widget-editable-list-delete-at (widget child) | |
2666 | ;; Delete child from list of children. | |
2667 | (save-excursion | |
ef3f635f | 2668 | (let ((buttons (copy-sequence (widget-get widget :buttons))) |
d543e20b PA |
2669 | button |
2670 | (inhibit-read-only t) | |
c6753d66 | 2671 | before-change-functions |
d543e20b PA |
2672 | after-change-functions) |
2673 | (while buttons | |
2674 | (setq button (car buttons) | |
2675 | buttons (cdr buttons)) | |
2676 | (when (eq (widget-get button :widget) child) | |
2677 | (widget-put widget | |
2678 | :buttons (delq button (widget-get widget :buttons))) | |
2679 | (widget-delete button)))) | |
2680 | (let ((entry-from (widget-get child :entry-from)) | |
2681 | (entry-to (widget-get child :entry-to)) | |
2682 | (inhibit-read-only t) | |
c6753d66 | 2683 | before-change-functions |
d543e20b PA |
2684 | after-change-functions) |
2685 | (widget-delete child) | |
2686 | (delete-region entry-from entry-to) | |
2687 | (set-marker entry-from nil) | |
2688 | (set-marker entry-to nil)) | |
2689 | (widget-put widget :children (delq child (widget-get widget :children)))) | |
2690 | (widget-setup) | |
2691 | (widget-apply widget :notify widget)) | |
2692 | ||
2693 | (defun widget-editable-list-entry-create (widget value conv) | |
2694 | ;; Create a new entry to the list. | |
2695 | (let ((type (nth 0 (widget-get widget :args))) | |
407e43be | 2696 | ;; (widget-push-button-gui widget-editable-list-gui) |
2ff864e0 | 2697 | child delete insert) |
bfa6c260 | 2698 | (widget-specify-insert |
d543e20b PA |
2699 | (save-excursion |
2700 | (and (widget-get widget :indent) | |
00d00aa9 | 2701 | (insert-char ?\s (widget-get widget :indent))) |
d543e20b PA |
2702 | (insert (widget-get widget :entry-format))) |
2703 | ;; Parse % escapes in format. | |
2704 | (while (re-search-forward "%\\(.\\)" nil t) | |
7fdbdbea DL |
2705 | (let ((escape (char-after (match-beginning 1)))) |
2706 | (delete-backward-char 2) | |
d543e20b | 2707 | (cond ((eq escape ?%) |
bfa6c260 | 2708 | (insert ?%)) |
2ff864e0 DL |
2709 | ((eq escape ?i) |
2710 | (setq insert (apply 'widget-create-child-and-convert | |
2711 | widget 'insert-button | |
2712 | (widget-get widget :insert-button-args)))) | |
2713 | ((eq escape ?d) | |
2714 | (setq delete (apply 'widget-create-child-and-convert | |
2715 | widget 'delete-button | |
2716 | (widget-get widget :delete-button-args)))) | |
d543e20b PA |
2717 | ((eq escape ?v) |
2718 | (if conv | |
bfa6c260 | 2719 | (setq child (widget-create-child-value |
d543e20b | 2720 | widget type value)) |
bfa6c260 | 2721 | (setq child (widget-create-child-value |
4c2f559e | 2722 | widget type (widget-default-get type))))) |
bfa6c260 | 2723 | (t |
d543e20b | 2724 | (error "Unknown escape `%c'" escape))))) |
407e43be SM |
2725 | (let ((buttons (widget-get widget :buttons))) |
2726 | (if insert (push insert buttons)) | |
2727 | (if delete (push delete buttons)) | |
2728 | (widget-put widget :buttons buttons)) | |
7fdbdbea DL |
2729 | (let ((entry-from (point-min-marker)) |
2730 | (entry-to (point-max-marker))) | |
d543e20b PA |
2731 | (set-marker-insertion-type entry-from t) |
2732 | (set-marker-insertion-type entry-to nil) | |
2733 | (widget-put child :entry-from entry-from) | |
2734 | (widget-put child :entry-to entry-to))) | |
407e43be SM |
2735 | (if insert (widget-put insert :widget child)) |
2736 | (if delete (widget-put delete :widget child)) | |
d543e20b PA |
2737 | child)) |
2738 | ||
2739 | ;;; The `group' Widget. | |
2740 | ||
2741 | (define-widget 'group 'default | |
a89a9d34 | 2742 | "A widget which groups other widgets inside." |
d543e20b | 2743 | :convert-widget 'widget-types-convert-widget |
4c2f559e | 2744 | :copy 'widget-types-copy |
d543e20b PA |
2745 | :format "%v" |
2746 | :value-create 'widget-group-value-create | |
d543e20b | 2747 | :value-get 'widget-editable-list-value-get |
783824f5 | 2748 | :default-get 'widget-group-default-get |
a3c88c59 | 2749 | :validate 'widget-children-validate |
d543e20b PA |
2750 | :match 'widget-group-match |
2751 | :match-inline 'widget-group-match-inline) | |
2752 | ||
2753 | (defun widget-group-value-create (widget) | |
2754 | ;; Create each component. | |
2755 | (let ((args (widget-get widget :args)) | |
2756 | (value (widget-get widget :value)) | |
2757 | arg answer children) | |
2758 | (while args | |
2759 | (setq arg (car args) | |
2760 | args (cdr args) | |
2761 | answer (widget-match-inline arg value) | |
2762 | value (cdr answer)) | |
2763 | (and (eq (preceding-char) ?\n) | |
2764 | (widget-get widget :indent) | |
00d00aa9 | 2765 | (insert-char ?\s (widget-get widget :indent))) |
3acab5ef PA |
2766 | (push (cond ((null answer) |
2767 | (widget-create-child widget arg)) | |
2768 | ((widget-get arg :inline) | |
7fdbdbea | 2769 | (widget-create-child-value widget arg (car answer))) |
3acab5ef | 2770 | (t |
7fdbdbea | 2771 | (widget-create-child-value widget arg (car (car answer))))) |
3acab5ef | 2772 | children)) |
d543e20b PA |
2773 | (widget-put widget :children (nreverse children)))) |
2774 | ||
783824f5 RS |
2775 | (defun widget-group-default-get (widget) |
2776 | ;; Get the default of the components. | |
2777 | (mapcar 'widget-default-get (widget-get widget :args))) | |
2778 | ||
d543e20b PA |
2779 | (defun widget-group-match (widget values) |
2780 | ;; Match if the components match. | |
2781 | (and (listp values) | |
2782 | (let ((match (widget-group-match-inline widget values))) | |
2783 | (and match (null (cdr match)))))) | |
2784 | ||
2785 | (defun widget-group-match-inline (widget vals) | |
2786 | ;; Match if the components match. | |
2787 | (let ((args (widget-get widget :args)) | |
2788 | argument answer found) | |
2789 | (while args | |
2790 | (setq argument (car args) | |
2791 | args (cdr args) | |
2792 | answer (widget-match-inline argument vals)) | |
bfa6c260 | 2793 | (if answer |
d543e20b PA |
2794 | (setq vals (cdr answer) |
2795 | found (append found (car answer))) | |
2796 | (setq vals nil | |
2797 | args nil))) | |
2798 | (if answer | |
bfa6c260 | 2799 | (cons found vals)))) |
d543e20b | 2800 | |
3acab5ef | 2801 | ;;; The `visibility' Widget. |
d543e20b | 2802 | |
3acab5ef PA |
2803 | (define-widget 'visibility 'item |
2804 | "An indicator and manipulator for hidden items." | |
2805 | :format "%[%v%]" | |
2806 | :button-prefix "" | |
2807 | :button-suffix "" | |
c6753d66 RS |
2808 | :on "Hide" |
2809 | :off "Show" | |
3acab5ef PA |
2810 | :value-create 'widget-visibility-value-create |
2811 | :action 'widget-toggle-action | |
2812 | :match (lambda (widget value) t)) | |
d543e20b | 2813 | |
3acab5ef PA |
2814 | (defun widget-visibility-value-create (widget) |
2815 | ;; Insert text representing the `on' and `off' states. | |
2816 | (let ((on (widget-get widget :on)) | |
2817 | (off (widget-get widget :off))) | |
2818 | (if on | |
2819 | (setq on (concat widget-push-button-prefix | |
2820 | on | |
2821 | widget-push-button-suffix)) | |
2822 | (setq on "")) | |
2823 | (if off | |
2824 | (setq off (concat widget-push-button-prefix | |
c6753d66 RS |
2825 | off |
2826 | widget-push-button-suffix)) | |
3acab5ef PA |
2827 | (setq off "")) |
2828 | (if (widget-value widget) | |
bfa6c260 DL |
2829 | (widget-image-insert widget on "down" "down-pushed") |
2830 | (widget-image-insert widget off "right" "right-pushed")))) | |
c6753d66 | 2831 | |
8697863a PA |
2832 | ;;; The `documentation-link' Widget. |
2833 | ;; | |
2834 | ;; This is a helper widget for `documentation-string'. | |
3acab5ef | 2835 | |
8697863a PA |
2836 | (define-widget 'documentation-link 'link |
2837 | "Link type used in documentation strings." | |
2838 | :tab-order -1 | |
bfa6c260 | 2839 | :help-echo "Describe this symbol" |
8697863a PA |
2840 | :action 'widget-documentation-link-action) |
2841 | ||
8697863a | 2842 | (defun widget-documentation-link-action (widget &optional event) |
f9923499 | 2843 | "Display documentation for WIDGET's value. Ignore optional argument EVENT." |
9dccd7ef RS |
2844 | (let* ((string (widget-get widget :value)) |
2845 | (symbol (intern string))) | |
2846 | (if (and (fboundp symbol) (boundp symbol)) | |
f9923499 | 2847 | ;; If there are two doc strings, give the user a way to pick one. |
9dccd7ef RS |
2848 | (apropos (concat "\\`" (regexp-quote string) "\\'")) |
2849 | (if (fboundp symbol) | |
2850 | (describe-function symbol) | |
2851 | (describe-variable symbol))))) | |
8697863a PA |
2852 | |
2853 | (defcustom widget-documentation-links t | |
2854 | "Add hyperlinks to documentation strings when non-nil." | |
2855 | :type 'boolean | |
2856 | :group 'widget-documentation) | |
2857 | ||
2858 | (defcustom widget-documentation-link-regexp "`\\([^\n`' ]+\\)'" | |
2859 | "Regexp for matching potential links in documentation strings. | |
2860 | The first group should be the link itself." | |
2861 | :type 'regexp | |
2862 | :group 'widget-documentation) | |
2863 | ||
2864 | (defcustom widget-documentation-link-p 'intern-soft | |
2865 | "Predicate used to test if a string is useful as a link. | |
a3545af4 | 2866 | The value should be a function. The function will be called with one |
8697863a PA |
2867 | argument, a string, and should return non-nil if there should be a |
2868 | link for that string." | |
2869 | :type 'function | |
2870 | :options '(widget-documentation-link-p) | |
2871 | :group 'widget-documentation) | |
2872 | ||
2873 | (defcustom widget-documentation-link-type 'documentation-link | |
2874 | "Widget type used for links in documentation strings." | |
2875 | :type 'symbol | |
2876 | :group 'widget-documentation) | |
2877 | ||
2878 | (defun widget-documentation-link-add (widget from to) | |
2879 | (widget-specify-doc widget from to) | |
2880 | (when widget-documentation-links | |
2881 | (let ((regexp widget-documentation-link-regexp) | |
a89a9d34 DL |
2882 | (buttons (widget-get widget :buttons)) |
2883 | (widget-mouse-face (default-value 'widget-mouse-face)) | |
2884 | (widget-button-face widget-documentation-face) | |
2885 | (widget-button-pressed-face widget-documentation-face)) | |
8697863a PA |
2886 | (save-excursion |
2887 | (goto-char from) | |
2888 | (while (re-search-forward regexp to t) | |
2889 | (let ((name (match-string 1)) | |
a1a4fa22 PA |
2890 | (begin (match-beginning 1)) |
2891 | (end (match-end 1))) | |
7fdbdbea DL |
2892 | (when (funcall widget-documentation-link-p name) |
2893 | (push (widget-convert-button widget-documentation-link-type | |
2894 | begin end :value name) | |
8697863a PA |
2895 | buttons))))) |
2896 | (widget-put widget :buttons buttons))) | |
2897 | (let ((indent (widget-get widget :indent))) | |
2898 | (when (and indent (not (zerop indent))) | |
bfa6c260 | 2899 | (save-excursion |
8697863a PA |
2900 | (save-restriction |
2901 | (narrow-to-region from to) | |
2902 | (goto-char (point-min)) | |
2903 | (while (search-forward "\n" nil t) | |
00d00aa9 | 2904 | (insert-char ?\s indent))))))) |
8697863a PA |
2905 | |
2906 | ;;; The `documentation-string' Widget. | |
0ce5b5d5 | 2907 | |
3acab5ef PA |
2908 | (define-widget 'documentation-string 'item |
2909 | "A documentation string." | |
2910 | :format "%v" | |
2911 | :action 'widget-documentation-string-action | |
4a1b7052 CY |
2912 | :value-create 'widget-documentation-string-value-create |
2913 | :visibility-widget 'visibility) | |
3acab5ef PA |
2914 | |
2915 | (defun widget-documentation-string-value-create (widget) | |
2916 | ;; Insert documentation string. | |
2917 | (let ((doc (widget-value widget)) | |
8697863a | 2918 | (indent (widget-get widget :indent)) |
6aaedd12 PA |
2919 | (shown (widget-get (widget-get widget :parent) :documentation-shown)) |
2920 | (start (point))) | |
3acab5ef PA |
2921 | (if (string-match "\n" doc) |
2922 | (let ((before (substring doc 0 (match-beginning 0))) | |
2923 | (after (substring doc (match-beginning 0))) | |
7fdbdbea | 2924 | button) |
3e318d97 CY |
2925 | (when (and indent (not (zerop indent))) |
2926 | (insert-char ?\s indent)) | |
00d00aa9 | 2927 | (insert before ?\s) |
8697863a | 2928 | (widget-documentation-link-add widget start (point)) |
7fdbdbea DL |
2929 | (setq button |
2930 | (widget-create-child-and-convert | |
4a1b7052 | 2931 | widget (widget-get widget :visibility-widget) |
8697863a | 2932 | :help-echo "Show or hide rest of the documentation." |
dd98f00a | 2933 | :on "Hide Rest" |
c6753d66 | 2934 | :off "More" |
0640c647 | 2935 | :always-active t |
3acab5ef | 2936 | :action 'widget-parent-action |
7fdbdbea | 2937 | shown)) |
3acab5ef | 2938 | (when shown |
0ce5b5d5 | 2939 | (setq start (point)) |
8697863a | 2940 | (when (and indent (not (zerop indent))) |
00d00aa9 | 2941 | (insert-char ?\s indent)) |
0ce5b5d5 | 2942 | (insert after) |
8697863a | 2943 | (widget-documentation-link-add widget start (point))) |
7fdbdbea | 2944 | (widget-put widget :buttons (list button))) |
3e318d97 CY |
2945 | (when (and indent (not (zerop indent))) |
2946 | (insert-char ?\s indent)) | |
6aaedd12 | 2947 | (insert doc) |
8697863a | 2948 | (widget-documentation-link-add widget start (point)))) |
bfa6c260 | 2949 | (insert ?\n)) |
3acab5ef PA |
2950 | |
2951 | (defun widget-documentation-string-action (widget &rest ignore) | |
2952 | ;; Toggle documentation. | |
2953 | (let ((parent (widget-get widget :parent))) | |
bfa6c260 | 2954 | (widget-put parent :documentation-shown |
3acab5ef PA |
2955 | (not (widget-get parent :documentation-shown)))) |
2956 | ;; Redraw. | |
d543e20b | 2957 | (widget-value-set widget (widget-value widget))) |
4a1b7052 CY |
2958 | |
2959 | (defun widget-add-documentation-string-button (widget &rest args) | |
2960 | "Insert a new `documentation-string' widget based on WIDGET. | |
2961 | The new widget becomes a child of WIDGET, and is also added to | |
2962 | its `:buttons' list. The documentation string is found from | |
2963 | WIDGET using the function `widget-docstring'. | |
2964 | Optional ARGS specifies additional keyword arguments for the | |
2965 | `documentation-string' widget." | |
2966 | (let ((doc (widget-docstring widget)) | |
2967 | (indent (widget-get widget :indent)) | |
2968 | (doc-indent (widget-get widget :documentation-indent))) | |
2969 | (when doc | |
2970 | (and (eq (preceding-char) ?\n) | |
2971 | indent | |
2972 | (insert-char ?\s indent)) | |
2973 | (unless (or (numberp doc-indent) (null doc-indent)) | |
2974 | (setq doc-indent 0)) | |
4a1b7052 CY |
2975 | (widget-put widget :buttons |
2976 | (cons (apply 'widget-create-child-and-convert | |
2977 | widget 'documentation-string | |
511ab56a | 2978 | :indent doc-indent |
4a1b7052 CY |
2979 | (nconc args (list doc))) |
2980 | (widget-get widget :buttons)))))) | |
fc56773e | 2981 | \f |
d543e20b PA |
2982 | ;;; The Sexp Widgets. |
2983 | ||
2984 | (define-widget 'const 'item | |
2985 | "An immutable sexp." | |
6d528fc5 | 2986 | :prompt-value 'widget-const-prompt-value |
d543e20b PA |
2987 | :format "%t\n%d") |
2988 | ||
6d528fc5 PA |
2989 | (defun widget-const-prompt-value (widget prompt value unbound) |
2990 | ;; Return the value of the const. | |
2991 | (widget-value widget)) | |
2992 | ||
2993 | (define-widget 'function-item 'const | |
d543e20b PA |
2994 | "An immutable function name." |
2995 | :format "%v\n%h" | |
2996 | :documentation-property (lambda (symbol) | |
2997 | (condition-case nil | |
2998 | (documentation symbol t) | |
2999 | (error nil)))) | |
3000 | ||
6d528fc5 | 3001 | (define-widget 'variable-item 'const |
d543e20b PA |
3002 | "An immutable variable name." |
3003 | :format "%v\n%h" | |
3004 | :documentation-property 'variable-documentation) | |
3005 | ||
cc0a25e1 RS |
3006 | (define-widget 'other 'sexp |
3007 | "Matches any value, but doesn't let the user edit the value. | |
3008 | This is useful as last item in a `choice' widget. | |
3009 | You should use this widget type with a default value, | |
b720878d | 3010 | as in (other DEFAULT) or (other :tag \"NAME\" DEFAULT). |
cc0a25e1 RS |
3011 | If the user selects this alternative, that specifies DEFAULT |
3012 | as the value." | |
3013 | :tag "Other" | |
3014 | :format "%t%n" | |
3015 | :value 'other) | |
3016 | ||
6d528fc5 PA |
3017 | (defvar widget-string-prompt-value-history nil |
3018 | "History of input to `widget-string-prompt-value'.") | |
3019 | ||
a3c88c59 PA |
3020 | (define-widget 'string 'editable-field |
3021 | "A string" | |
3022 | :tag "String" | |
3023 | :format "%{%t%}: %v" | |
0ce5b5d5 | 3024 | :complete-function 'ispell-complete-word |
a3c88c59 | 3025 | :prompt-history 'widget-string-prompt-value-history) |
6d528fc5 | 3026 | |
937382fa | 3027 | (defvar widget) |
b0628208 DL |
3028 | |
3029 | (defun widget-string-complete () | |
3030 | "Complete contents of string field. | |
3031 | Completions are taken from the :completion-alist property of the | |
3032 | widget. If that isn't a list, it's evalled and expected to yield a list." | |
3033 | (interactive) | |
3034 | (let* ((prefix (buffer-substring-no-properties (widget-field-start widget) | |
3035 | (point))) | |
3036 | (completion-ignore-case (widget-get widget :completion-ignore-case)) | |
3037 | (alist (widget-get widget :completion-alist)) | |
3038 | (_ (unless (listp alist) | |
3039 | (setq alist (eval alist)))) | |
3040 | (completion (try-completion prefix alist))) | |
3041 | (cond ((eq completion t) | |
3042 | (when completion-ignore-case | |
3043 | ;; Replace field with completion in case its case is different. | |
3044 | (delete-region (widget-field-start widget) | |
3045 | (widget-field-end widget)) | |
e0576f07 | 3046 | (insert-and-inherit (car (assoc-string prefix alist t)))) |
b0628208 DL |
3047 | (message "Only match")) |
3048 | ((null completion) | |
3049 | (error "No match")) | |
3050 | ((not (eq t (compare-strings prefix nil nil completion nil nil | |
3051 | completion-ignore-case))) | |
3052 | (when completion-ignore-case | |
3053 | ;; Replace field with completion in case its case is different. | |
3054 | (delete-region (widget-field-start widget) | |
3055 | (widget-field-end widget)) | |
3056 | (insert-and-inherit completion))) | |
3057 | (t | |
3058 | (message "Making completion list...") | |
3059 | (with-output-to-temp-buffer "*Completions*" | |
3060 | (display-completion-list | |
3061 | (all-completions prefix alist nil))) | |
3062 | (message "Making completion list...done"))))) | |
3063 | ||
d543e20b PA |
3064 | (define-widget 'regexp 'string |
3065 | "A regular expression." | |
6d528fc5 PA |
3066 | :match 'widget-regexp-match |
3067 | :validate 'widget-regexp-validate | |
4ee1cf9f | 3068 | ;; Doesn't work well with terminating newline. |
0efefc52 | 3069 | ;; :value-face 'widget-single-line-field |
d543e20b PA |
3070 | :tag "Regexp") |
3071 | ||
6d528fc5 PA |
3072 | (defun widget-regexp-match (widget value) |
3073 | ;; Match valid regexps. | |
3074 | (and (stringp value) | |
a3c88c59 | 3075 | (condition-case nil |
6d528fc5 PA |
3076 | (prog1 t |
3077 | (string-match value "")) | |
3078 | (error nil)))) | |
3079 | ||
3080 | (defun widget-regexp-validate (widget) | |
3081 | "Check that the value of WIDGET is a valid regexp." | |
7fdbdbea DL |
3082 | (condition-case data |
3083 | (prog1 nil | |
3084 | (string-match (widget-value widget) "")) | |
3085 | (error (widget-put widget :error (error-message-string data)) | |
3086 | widget))) | |
6d528fc5 | 3087 | |
d543e20b | 3088 | (define-widget 'file 'string |
bfa6c260 | 3089 | "A file widget. |
f29cf2b1 | 3090 | It reads a file name from an editable text field." |
f1231b8e | 3091 | :complete-function 'widget-file-complete |
6d528fc5 | 3092 | :prompt-value 'widget-file-prompt-value |
a3c88c59 | 3093 | :format "%{%t%}: %v" |
4ee1cf9f | 3094 | ;; Doesn't work well with terminating newline. |
0efefc52 | 3095 | ;; :value-face 'widget-single-line-field |
f1231b8e RS |
3096 | :tag "File") |
3097 | ||
3098 | (defun widget-file-complete () | |
3099 | "Perform completion on file name preceding point." | |
3100 | (interactive) | |
3101 | (let* ((end (point)) | |
d315fc0f | 3102 | (beg (widget-field-start widget)) |
f1231b8e RS |
3103 | (pattern (buffer-substring beg end)) |
3104 | (name-part (file-name-nondirectory pattern)) | |
d315fc0f RS |
3105 | ;; I think defaulting to root is right |
3106 | ;; because these really should be absolute file names. | |
3107 | (directory (or (file-name-directory pattern) "/")) | |
f1231b8e RS |
3108 | (completion (file-name-completion name-part directory))) |
3109 | (cond ((eq completion t)) | |
3110 | ((null completion) | |
3111 | (message "Can't find completion for \"%s\"" pattern) | |
3112 | (ding)) | |
3113 | ((not (string= name-part completion)) | |
3114 | (delete-region beg end) | |
3115 | (insert (expand-file-name completion directory))) | |
3116 | (t | |
3117 | (message "Making completion list...") | |
7fdbdbea DL |
3118 | (with-output-to-temp-buffer "*Completions*" |
3119 | (display-completion-list | |
3120 | (sort (file-name-all-completions name-part directory) | |
f5fab556 MY |
3121 | 'string<) |
3122 | name-part)) | |
f1231b8e | 3123 | (message "Making completion list...%s" "done"))))) |
d543e20b | 3124 | |
6d528fc5 PA |
3125 | (defun widget-file-prompt-value (widget prompt value unbound) |
3126 | ;; Read file from minibuffer. | |
3127 | (abbreviate-file-name | |
3128 | (if unbound | |
3129 | (read-file-name prompt) | |
5b76833f | 3130 | (let ((prompt2 (format "%s (default %s): " prompt value)) |
6d528fc5 PA |
3131 | (dir (file-name-directory value)) |
3132 | (file (file-name-nondirectory value)) | |
3133 | (must-match (widget-get widget :must-match))) | |
3134 | (read-file-name prompt2 dir nil must-match file))))) | |
3135 | ||
f1231b8e RS |
3136 | ;;;(defun widget-file-action (widget &optional event) |
3137 | ;;; ;; Read a file name from the minibuffer. | |
3138 | ;;; (let* ((value (widget-value widget)) | |
3139 | ;;; (dir (file-name-directory value)) | |
3140 | ;;; (file (file-name-nondirectory value)) | |
3141 | ;;; (menu-tag (widget-apply widget :menu-tag-get)) | |
3142 | ;;; (must-match (widget-get widget :must-match)) | |
5b76833f | 3143 | ;;; (answer (read-file-name (concat menu-tag " (default " value "): ") |
f1231b8e RS |
3144 | ;;; dir nil must-match file))) |
3145 | ;;; (widget-value-set widget (abbreviate-file-name answer)) | |
3146 | ;;; (widget-setup) | |
3147 | ;;; (widget-apply widget :notify widget event))) | |
d543e20b | 3148 | |
bd1f16ce | 3149 | ;; Fixme: use file-name-as-directory. |
d543e20b | 3150 | (define-widget 'directory 'file |
bfa6c260 | 3151 | "A directory widget. |
f29cf2b1 | 3152 | It reads a directory name from an editable text field." |
d543e20b PA |
3153 | :tag "Directory") |
3154 | ||
a3c88c59 PA |
3155 | (defvar widget-symbol-prompt-value-history nil |
3156 | "History of input to `widget-symbol-prompt-value'.") | |
3157 | ||
3158 | (define-widget 'symbol 'editable-field | |
4084d128 | 3159 | "A Lisp symbol." |
d543e20b PA |
3160 | :value nil |
3161 | :tag "Symbol" | |
a3c88c59 | 3162 | :format "%{%t%}: %v" |
d543e20b | 3163 | :match (lambda (widget value) (symbolp value)) |
f1231b8e | 3164 | :complete-function 'lisp-complete-symbol |
a3c88c59 PA |
3165 | :prompt-internal 'widget-symbol-prompt-internal |
3166 | :prompt-match 'symbolp | |
3167 | :prompt-history 'widget-symbol-prompt-value-history | |
d543e20b PA |
3168 | :value-to-internal (lambda (widget value) |
3169 | (if (symbolp value) | |
3170 | (symbol-name value) | |
3171 | value)) | |
3172 | :value-to-external (lambda (widget value) | |
3173 | (if (stringp value) | |
3174 | (intern value) | |
3175 | value))) | |
3176 | ||
a3c88c59 PA |
3177 | (defun widget-symbol-prompt-internal (widget prompt initial history) |
3178 | ;; Read file from minibuffer. | |
bfa6c260 | 3179 | (let ((answer (completing-read prompt obarray |
a3c88c59 PA |
3180 | (widget-get widget :prompt-match) |
3181 | nil initial history))) | |
3182 | (if (and (stringp answer) | |
3183 | (not (zerop (length answer)))) | |
3184 | answer | |
3185 | (error "No value")))) | |
3186 | ||
3187 | (defvar widget-function-prompt-value-history nil | |
3188 | "History of input to `widget-function-prompt-value'.") | |
3189 | ||
99477684 | 3190 | (define-widget 'function 'restricted-sexp |
4084d128 | 3191 | "A Lisp function." |
7fdbdbea DL |
3192 | :complete-function (lambda () |
3193 | (interactive) | |
3194 | (lisp-complete-symbol 'fboundp)) | |
a3c88c59 PA |
3195 | :prompt-value 'widget-field-prompt-value |
3196 | :prompt-internal 'widget-symbol-prompt-internal | |
3197 | :prompt-match 'fboundp | |
3198 | :prompt-history 'widget-function-prompt-value-history | |
3199 | :action 'widget-field-action | |
bd1f16ce | 3200 | :match-alternatives '(functionp) |
7fdbdbea DL |
3201 | :validate (lambda (widget) |
3202 | (unless (functionp (widget-value widget)) | |
3203 | (widget-put widget :error (format "Invalid function: %S" | |
3204 | (widget-value widget))) | |
3205 | widget)) | |
3206 | :value 'ignore | |
d543e20b PA |
3207 | :tag "Function") |
3208 | ||
a3c88c59 PA |
3209 | (defvar widget-variable-prompt-value-history nil |
3210 | "History of input to `widget-variable-prompt-value'.") | |
3211 | ||
d543e20b | 3212 | (define-widget 'variable 'symbol |
be96282a | 3213 | "A Lisp variable." |
a3c88c59 PA |
3214 | :prompt-match 'boundp |
3215 | :prompt-history 'widget-variable-prompt-value-history | |
7fdbdbea DL |
3216 | :complete-function (lambda () |
3217 | (interactive) | |
3218 | (lisp-complete-symbol 'boundp)) | |
d543e20b PA |
3219 | :tag "Variable") |
3220 | ||
fc56773e RS |
3221 | (define-widget 'coding-system 'symbol |
3222 | "A MULE coding-system." | |
3223 | :format "%{%t%}: %v" | |
3224 | :tag "Coding system" | |
7fdbdbea | 3225 | :base-only nil |
b0628208 | 3226 | :prompt-history 'coding-system-value-history |
fc56773e | 3227 | :prompt-value 'widget-coding-system-prompt-value |
7fdbdbea DL |
3228 | :action 'widget-coding-system-action |
3229 | :complete-function (lambda () | |
3230 | (interactive) | |
3231 | (lisp-complete-symbol 'coding-system-p)) | |
3232 | :validate (lambda (widget) | |
3233 | (unless (coding-system-p (widget-value widget)) | |
3234 | (widget-put widget :error (format "Invalid coding system: %S" | |
3235 | (widget-value widget))) | |
3236 | widget)) | |
3237 | :value 'undecided | |
3238 | :prompt-match 'coding-system-p) | |
3239 | ||
fc56773e | 3240 | (defun widget-coding-system-prompt-value (widget prompt value unbound) |
7fdbdbea DL |
3241 | "Read coding-system from minibuffer." |
3242 | (if (widget-get widget :base-only) | |
3243 | (intern | |
5b76833f | 3244 | (completing-read (format "%s (default %s): " prompt value) |
7fdbdbea DL |
3245 | (mapcar #'list (coding-system-list t)) nil nil nil |
3246 | coding-system-history)) | |
5b76833f | 3247 | (read-coding-system (format "%s (default %s): " prompt value) value))) |
fc56773e RS |
3248 | |
3249 | (defun widget-coding-system-action (widget &optional event) | |
fc56773e RS |
3250 | (let ((answer |
3251 | (widget-coding-system-prompt-value | |
3252 | widget | |
3253 | (widget-apply widget :menu-tag-get) | |
3254 | (widget-value widget) | |
3255 | t))) | |
3256 | (widget-value-set widget answer) | |
3257 | (widget-apply widget :notify widget event) | |
3258 | (widget-setup))) | |
fc56773e | 3259 | \f |
0f5642c2 | 3260 | ;;; I'm not sure about what this is good for? KFS. |
987cee97 RS |
3261 | (defvar widget-key-sequence-prompt-value-history nil |
3262 | "History of input to `widget-key-sequence-prompt-value'.") | |
3263 | ||
0f5642c2 KS |
3264 | (defvar widget-key-sequence-default-value [ignore] |
3265 | "Default value for an empty key sequence.") | |
3266 | ||
3267 | (defvar widget-key-sequence-map | |
3268 | (let ((map (make-sparse-keymap))) | |
3269 | (set-keymap-parent map widget-field-keymap) | |
3270 | (define-key map [(control ?q)] 'widget-key-sequence-read-event) | |
3271 | map)) | |
987cee97 RS |
3272 | |
3273 | (define-widget 'key-sequence 'restricted-sexp | |
0f5642c2 | 3274 | "A key sequence." |
987cee97 RS |
3275 | :prompt-value 'widget-field-prompt-value |
3276 | :prompt-internal 'widget-symbol-prompt-internal | |
0f5642c2 | 3277 | ; :prompt-match 'fboundp ;; What was this good for? KFS |
987cee97 RS |
3278 | :prompt-history 'widget-key-sequence-prompt-value-history |
3279 | :action 'widget-field-action | |
3280 | :match-alternatives '(stringp vectorp) | |
0f5642c2 KS |
3281 | :format "%{%t%}: %v" |
3282 | :validate 'widget-key-sequence-validate | |
3283 | :value-to-internal 'widget-key-sequence-value-to-internal | |
3284 | :value-to-external 'widget-key-sequence-value-to-external | |
3285 | :value widget-key-sequence-default-value | |
3286 | :keymap widget-key-sequence-map | |
3287 | :help-echo "C-q: insert KEY, EVENT, or CODE; RET: enter value" | |
987cee97 | 3288 | :tag "Key sequence") |
0f5642c2 KS |
3289 | |
3290 | (defun widget-key-sequence-read-event (ev) | |
3291 | (interactive (list | |
3292 | (let ((inhibit-quit t) quit-flag) | |
3293 | (read-event "Insert KEY, EVENT, or CODE: ")))) | |
3294 | (let ((ev2 (and (memq 'down (event-modifiers ev)) | |
3295 | (read-event))) | |
3296 | (tr (and (keymapp function-key-map) | |
3297 | (lookup-key function-key-map (vector ev))))) | |
3298 | (when (and (integerp ev) | |
3299 | (or (and (<= ?0 ev) (< ev (+ ?0 (min 10 read-quoted-char-radix)))) | |
3300 | (and (<= ?a (downcase ev)) | |
3301 | (< (downcase ev) (+ ?a -10 (min 36 read-quoted-char-radix)))))) | |
3302 | (setq unread-command-events (cons ev unread-command-events) | |
3303 | ev (read-quoted-char (format "Enter code (radix %d)" read-quoted-char-radix)) | |
3304 | tr nil) | |
e0576f07 | 3305 | (if (and (integerp ev) (not (characterp ev))) |
0f5642c2 KS |
3306 | (insert (char-to-string ev)))) ;; throw invalid char error |
3307 | (setq ev (key-description (list ev))) | |
3308 | (when (arrayp tr) | |
3309 | (setq tr (key-description (list (aref tr 0)))) | |
3310 | (if (y-or-n-p (format "Key %s is translated to %s -- use %s? " ev tr tr)) | |
3311 | (setq ev tr ev2 nil))) | |
3312 | (insert (if (= (char-before) ?\s) "" " ") ev " ") | |
3313 | (if ev2 | |
3314 | (insert (key-description (list ev2)) " ")))) | |
3315 | ||
3316 | (defun widget-key-sequence-validate (widget) | |
3317 | (unless (or (stringp (widget-value widget)) | |
3318 | (vectorp (widget-value widget))) | |
3319 | (widget-put widget :error (format "Invalid key sequence: %S" | |
3320 | (widget-value widget))) | |
3321 | widget)) | |
3322 | ||
3323 | (defun widget-key-sequence-value-to-internal (widget value) | |
3324 | (if (widget-apply widget :match value) | |
3325 | (if (equal value widget-key-sequence-default-value) | |
3326 | "" | |
3327 | (key-description value)) | |
3328 | value)) | |
3329 | ||
3330 | (defun widget-key-sequence-value-to-external (widget value) | |
3331 | (if (stringp value) | |
3332 | (if (string-match "\\`[[:space:]]*\\'" value) | |
3333 | widget-key-sequence-default-value | |
3334 | (read-kbd-macro value)) | |
3335 | value)) | |
3336 | ||
987cee97 | 3337 | \f |
a3c88c59 | 3338 | (define-widget 'sexp 'editable-field |
be96282a | 3339 | "An arbitrary Lisp expression." |
d543e20b | 3340 | :tag "Lisp expression" |
a3c88c59 | 3341 | :format "%{%t%}: %v" |
d543e20b PA |
3342 | :value nil |
3343 | :validate 'widget-sexp-validate | |
3344 | :match (lambda (widget value) t) | |
3345 | :value-to-internal 'widget-sexp-value-to-internal | |
6d528fc5 | 3346 | :value-to-external (lambda (widget value) (read value)) |
a3c88c59 | 3347 | :prompt-history 'widget-sexp-prompt-value-history |
6d528fc5 | 3348 | :prompt-value 'widget-sexp-prompt-value) |
d543e20b PA |
3349 | |
3350 | (defun widget-sexp-value-to-internal (widget value) | |
3351 | ;; Use pp for printer representation. | |
6d1ab9d4 RS |
3352 | (let ((pp (if (symbolp value) |
3353 | (prin1-to-string value) | |
3354 | (pp-to-string value)))) | |
d543e20b PA |
3355 | (while (string-match "\n\\'" pp) |
3356 | (setq pp (substring pp 0 -1))) | |
3357 | (if (or (string-match "\n\\'" pp) | |
3358 | (> (length pp) 40)) | |
3359 | (concat "\n" pp) | |
3360 | pp))) | |
3361 | ||
3362 | (defun widget-sexp-validate (widget) | |
3363 | ;; Valid if we can read the string and there is no junk left after it. | |
99f01612 DL |
3364 | (with-temp-buffer |
3365 | (insert (widget-apply widget :value-get)) | |
3366 | (goto-char (point-min)) | |
1d869634 DL |
3367 | (let (err) |
3368 | (condition-case data | |
3369 | (progn | |
3370 | ;; Avoid a confusing end-of-file error. | |
3371 | (skip-syntax-forward "\\s-") | |
3372 | (if (eobp) | |
3373 | (setq err "Empty sexp -- use `nil'?") | |
7fdbdbea | 3374 | (unless (widget-apply widget :match (read (current-buffer))) |
1d869634 | 3375 | (setq err (widget-get widget :type-error)))) |
3bc603c4 LH |
3376 | ;; Allow whitespace after expression. |
3377 | (skip-syntax-forward "\\s-") | |
1d869634 DL |
3378 | (if (and (not (eobp)) |
3379 | (not err)) | |
3380 | (setq err (format "Junk at end of expression: %s" | |
3381 | (buffer-substring (point) | |
3382 | (point-max)))))) | |
3383 | (end-of-file ; Avoid confusing error message. | |
3384 | (setq err "Unbalanced sexp")) | |
3385 | (error (setq err (error-message-string data)))) | |
3386 | (if (not err) | |
3387 | nil | |
3388 | (widget-put widget :error err) | |
3389 | widget)))) | |
d543e20b | 3390 | |
6d528fc5 PA |
3391 | (defvar widget-sexp-prompt-value-history nil |
3392 | "History of input to `widget-sexp-prompt-value'.") | |
3393 | ||
3394 | (defun widget-sexp-prompt-value (widget prompt value unbound) | |
3395 | ;; Read an arbitrary sexp. | |
3396 | (let ((found (read-string prompt | |
a3c88c59 PA |
3397 | (if unbound nil (cons (prin1-to-string value) 0)) |
3398 | (widget-get widget :prompt-history)))) | |
bfa6c260 DL |
3399 | (let ((answer (read-from-string found))) |
3400 | (unless (= (cdr answer) (length found)) | |
3401 | (error "Junk at end of expression: %s" | |
3402 | (substring found (cdr answer)))) | |
3403 | (car answer)))) | |
a3c88c59 | 3404 | |
0b296dac RS |
3405 | (define-widget 'restricted-sexp 'sexp |
3406 | "A Lisp expression restricted to values that match. | |
3407 | To use this type, you must define :match or :match-alternatives." | |
3408 | :type-error "The specified value is not valid" | |
3409 | :match 'widget-restricted-sexp-match | |
3410 | :value-to-internal (lambda (widget value) | |
3411 | (if (widget-apply widget :match value) | |
3412 | (prin1-to-string value) | |
3413 | value))) | |
3414 | ||
3415 | (defun widget-restricted-sexp-match (widget value) | |
3416 | (let ((alternatives (widget-get widget :match-alternatives)) | |
3417 | matched) | |
3418 | (while (and alternatives (not matched)) | |
3419 | (if (cond ((functionp (car alternatives)) | |
3420 | (funcall (car alternatives) value)) | |
3421 | ((and (consp (car alternatives)) | |
3422 | (eq (car (car alternatives)) 'quote)) | |
3423 | (eq value (nth 1 (car alternatives))))) | |
3424 | (setq matched t)) | |
3425 | (setq alternatives (cdr alternatives))) | |
3426 | matched)) | |
fc56773e | 3427 | \f |
0b296dac | 3428 | (define-widget 'integer 'restricted-sexp |
d543e20b PA |
3429 | "An integer." |
3430 | :tag "Integer" | |
3431 | :value 0 | |
3432 | :type-error "This field should contain an integer" | |
0b296dac RS |
3433 | :match-alternatives '(integerp)) |
3434 | ||
3435 | (define-widget 'number 'restricted-sexp | |
d9bfd9dc | 3436 | "A number (floating point or integer)." |
0b296dac RS |
3437 | :tag "Number" |
3438 | :value 0.0 | |
d9bfd9dc | 3439 | :type-error "This field should contain a number (floating point or integer)" |
0b296dac | 3440 | :match-alternatives '(numberp)) |
d543e20b | 3441 | |
d9bfd9dc MR |
3442 | (define-widget 'float 'restricted-sexp |
3443 | "A floating point number." | |
3444 | :tag "Floating point number" | |
3445 | :value 0.0 | |
3446 | :type-error "This field should contain a floating point number" | |
3447 | :match-alternatives '(floatp)) | |
3448 | ||
a3c88c59 | 3449 | (define-widget 'character 'editable-field |
0b296dac | 3450 | "A character." |
d543e20b PA |
3451 | :tag "Character" |
3452 | :value 0 | |
bfa6c260 | 3453 | :size 1 |
d543e20b | 3454 | :format "%{%t%}: %v\n" |
6d528fc5 PA |
3455 | :valid-regexp "\\`.\\'" |
3456 | :error "This field should contain a single character" | |
d543e20b | 3457 | :value-to-internal (lambda (widget value) |
bfa6c260 | 3458 | (if (stringp value) |
a3c88c59 PA |
3459 | value |
3460 | (char-to-string value))) | |
d543e20b PA |
3461 | :value-to-external (lambda (widget value) |
3462 | (if (stringp value) | |
3463 | (aref value 0) | |
3464 | value)) | |
a3c88c59 | 3465 | :match (lambda (widget value) |
e2056874 | 3466 | (characterp value))) |
d543e20b | 3467 | |
d543e20b | 3468 | (define-widget 'list 'group |
be96282a | 3469 | "A Lisp list." |
d543e20b PA |
3470 | :tag "List" |
3471 | :format "%{%t%}:\n%v") | |
3472 | ||
3473 | (define-widget 'vector 'group | |
be96282a | 3474 | "A Lisp vector." |
d543e20b PA |
3475 | :tag "Vector" |
3476 | :format "%{%t%}:\n%v" | |
3477 | :match 'widget-vector-match | |
3478 | :value-to-internal (lambda (widget value) (append value nil)) | |
3479 | :value-to-external (lambda (widget value) (apply 'vector value))) | |
3480 | ||
bfa6c260 | 3481 | (defun widget-vector-match (widget value) |
d543e20b PA |
3482 | (and (vectorp value) |
3483 | (widget-group-match widget | |
bd042c03 | 3484 | (widget-apply widget :value-to-internal value)))) |
d543e20b PA |
3485 | |
3486 | (define-widget 'cons 'group | |
3487 | "A cons-cell." | |
3488 | :tag "Cons-cell" | |
3489 | :format "%{%t%}:\n%v" | |
3490 | :match 'widget-cons-match | |
3491 | :value-to-internal (lambda (widget value) | |
3492 | (list (car value) (cdr value))) | |
3493 | :value-to-external (lambda (widget value) | |
407e43be | 3494 | (apply 'cons value))) |
d543e20b | 3495 | |
bfa6c260 | 3496 | (defun widget-cons-match (widget value) |
d543e20b PA |
3497 | (and (consp value) |
3498 | (widget-group-match widget | |
3499 | (widget-apply widget :value-to-internal value)))) | |
fc56773e | 3500 | \f |
6b61353c KH |
3501 | ;;; The `lazy' Widget. |
3502 | ;; | |
3503 | ;; Recursive datatypes. | |
3504 | ||
3505 | (define-widget 'lazy 'default | |
3506 | "Base widget for recursive datastructures. | |
3507 | ||
3508 | The `lazy' widget will, when instantiated, contain a single inferior | |
3509 | widget, of the widget type specified by the :type parameter. The | |
3510 | value of the `lazy' widget is the same as the value of the inferior | |
3511 | widget. When deriving a new widget from the 'lazy' widget, the :type | |
3512 | parameter is allowed to refer to the widget currently being defined, | |
3513 | thus allowing recursive datastructures to be described. | |
3514 | ||
3515 | The :type parameter takes the same arguments as the defcustom | |
3516 | parameter with the same name. | |
3517 | ||
3518 | Most composite widgets, i.e. widgets containing other widgets, does | |
3519 | not allow recursion. That is, when you define a new widget type, none | |
3520 | of the inferior widgets may be of the same type you are currently | |
3521 | defining. | |
3522 | ||
3523 | In Lisp, however, it is custom to define datastructures in terms of | |
3524 | themselves. A list, for example, is defined as either nil, or a cons | |
3525 | cell whose cdr itself is a list. The obvious way to translate this | |
3526 | into a widget type would be | |
3527 | ||
3528 | (define-widget 'my-list 'choice | |
3529 | \"A list of sexps.\" | |
3530 | :tag \"Sexp list\" | |
3531 | :args '((const nil) (cons :value (nil) sexp my-list))) | |
3532 | ||
3533 | Here we attempt to define my-list as a choice of either the constant | |
3534 | nil, or a cons-cell containing a sexp and my-lisp. This will not work | |
3535 | because the `choice' widget does not allow recursion. | |
3536 | ||
0e726aa5 KS |
3537 | Using the `lazy' widget you can overcome this problem, as in this |
3538 | example: | |
6b61353c KH |
3539 | |
3540 | (define-widget 'sexp-list 'lazy | |
3541 | \"A list of sexps.\" | |
3542 | :tag \"Sexp list\" | |
3543 | :type '(choice (const nil) (cons :value (nil) sexp sexp-list)))" | |
3544 | :format "%{%t%}: %v" | |
3545 | ;; We don't convert :type because we want to allow recursive | |
3546 | ;; datastructures. This is slow, so we should not create speed | |
0e726aa5 | 3547 | ;; critical widgets by deriving from this. |
6b61353c KH |
3548 | :convert-widget 'widget-value-convert-widget |
3549 | :value-create 'widget-type-value-create | |
3550 | :value-get 'widget-child-value-get | |
3551 | :value-inline 'widget-child-value-inline | |
3552 | :default-get 'widget-type-default-get | |
3553 | :match 'widget-type-match | |
3554 | :validate 'widget-child-validate) | |
3555 | ||
3556 | \f | |
fc56773e RS |
3557 | ;;; The `plist' Widget. |
3558 | ;; | |
3559 | ;; Property lists. | |
3560 | ||
3561 | (define-widget 'plist 'list | |
3562 | "A property list." | |
3563 | :key-type '(symbol :tag "Key") | |
3564 | :value-type '(sexp :tag "Value") | |
3565 | :convert-widget 'widget-plist-convert-widget | |
3566 | :tag "Plist") | |
3567 | ||
3568 | (defvar widget-plist-value-type) ;Dynamic variable | |
3569 | ||
3570 | (defun widget-plist-convert-widget (widget) | |
3571 | ;; Handle `:options'. | |
3572 | (let* ((options (widget-get widget :options)) | |
4681ca3a | 3573 | (widget-plist-value-type (widget-get widget :value-type)) |
bfa6c260 | 3574 | (other `(editable-list :inline t |
fc56773e | 3575 | (group :inline t |
7fdbdbea | 3576 | ,(widget-get widget :key-type) |
4681ca3a | 3577 | ,widget-plist-value-type))) |
fc56773e RS |
3578 | (args (if options |
3579 | (list `(checklist :inline t | |
3580 | :greedy t | |
3581 | ,@(mapcar 'widget-plist-convert-option | |
3582 | options)) | |
3583 | other) | |
3584 | (list other)))) | |
3585 | (widget-put widget :args args) | |
3586 | widget)) | |
d543e20b | 3587 | |
fc56773e RS |
3588 | (defun widget-plist-convert-option (option) |
3589 | ;; Convert a single plist option. | |
3590 | (let (key-type value-type) | |
3591 | (if (listp option) | |
3592 | (let ((key (nth 0 option))) | |
3593 | (setq value-type (nth 1 option)) | |
3594 | (if (listp key) | |
31d5543d | 3595 | (setq key-type key) |
fc56773e RS |
3596 | (setq key-type `(const ,key)))) |
3597 | (setq key-type `(const ,option) | |
3598 | value-type widget-plist-value-type)) | |
3599 | `(group :format "Key: %v" :inline t ,key-type ,value-type))) | |
3600 | ||
3601 | ||
3602 | ;;; The `alist' Widget. | |
3603 | ;; | |
3604 | ;; Association lists. | |
3605 | ||
3606 | (define-widget 'alist 'list | |
3607 | "An association list." | |
a7013a02 | 3608 | :key-type '(sexp :tag "Key") |
fc56773e RS |
3609 | :value-type '(sexp :tag "Value") |
3610 | :convert-widget 'widget-alist-convert-widget | |
3611 | :tag "Alist") | |
3612 | ||
3613 | (defvar widget-alist-value-type) ;Dynamic variable | |
3614 | ||
3615 | (defun widget-alist-convert-widget (widget) | |
3616 | ;; Handle `:options'. | |
3617 | (let* ((options (widget-get widget :options)) | |
4681ca3a | 3618 | (widget-alist-value-type (widget-get widget :value-type)) |
bfa6c260 | 3619 | (other `(editable-list :inline t |
fc56773e | 3620 | (cons :format "%v" |
7fdbdbea | 3621 | ,(widget-get widget :key-type) |
4681ca3a | 3622 | ,widget-alist-value-type))) |
fc56773e RS |
3623 | (args (if options |
3624 | (list `(checklist :inline t | |
3625 | :greedy t | |
3626 | ,@(mapcar 'widget-alist-convert-option | |
3627 | options)) | |
3628 | other) | |
3629 | (list other)))) | |
3630 | (widget-put widget :args args) | |
3631 | widget)) | |
3632 | ||
3633 | (defun widget-alist-convert-option (option) | |
3634 | ;; Convert a single alist option. | |
3635 | (let (key-type value-type) | |
3636 | (if (listp option) | |
3637 | (let ((key (nth 0 option))) | |
3638 | (setq value-type (nth 1 option)) | |
3639 | (if (listp key) | |
31d5543d | 3640 | (setq key-type key) |
fc56773e RS |
3641 | (setq key-type `(const ,key)))) |
3642 | (setq key-type `(const ,option) | |
3643 | value-type widget-alist-value-type)) | |
3644 | `(cons :format "Key: %v" ,key-type ,value-type))) | |
3645 | \f | |
d543e20b PA |
3646 | (define-widget 'choice 'menu-choice |
3647 | "A union of several sexp types." | |
3648 | :tag "Choice" | |
c6753d66 | 3649 | :format "%{%t%}: %[Value Menu%] %v" |
8697863a PA |
3650 | :button-prefix 'widget-push-button-prefix |
3651 | :button-suffix 'widget-push-button-suffix | |
a3c88c59 PA |
3652 | :prompt-value 'widget-choice-prompt-value) |
3653 | ||
3654 | (defun widget-choice-prompt-value (widget prompt value unbound) | |
bfa6c260 | 3655 | "Make a choice." |
a3c88c59 PA |
3656 | (let ((args (widget-get widget :args)) |
3657 | (completion-ignore-case (widget-get widget :case-fold)) | |
3658 | current choices old) | |
7fdbdbea | 3659 | ;; Find the first arg that matches VALUE. |
a3c88c59 PA |
3660 | (let ((look args)) |
3661 | (while look | |
3662 | (if (widget-apply (car look) :match value) | |
3663 | (setq old (car look) | |
3664 | look nil) | |
3665 | (setq look (cdr look))))) | |
3666 | ;; Find new choice. | |
3667 | (setq current | |
3668 | (cond ((= (length args) 0) | |
3669 | nil) | |
3670 | ((= (length args) 1) | |
3671 | (nth 0 args)) | |
3672 | ((and (= (length args) 2) | |
3673 | (memq old args)) | |
3674 | (if (eq old (nth 0 args)) | |
3675 | (nth 1 args) | |
3676 | (nth 0 args))) | |
3677 | (t | |
3678 | (while args | |
3679 | (setq current (car args) | |
3680 | args (cdr args)) | |
3681 | (setq choices | |
3682 | (cons (cons (widget-apply current :menu-tag-get) | |
3683 | current) | |
3684 | choices))) | |
3685 | (let ((val (completing-read prompt choices nil t))) | |
3686 | (if (stringp val) | |
3687 | (let ((try (try-completion val choices))) | |
3688 | (when (stringp try) | |
3689 | (setq val try)) | |
3690 | (cdr (assoc val choices))) | |
3691 | nil))))) | |
3692 | (if current | |
3693 | (widget-prompt-value current prompt nil t) | |
3694 | value))) | |
fc56773e | 3695 | \f |
d543e20b PA |
3696 | (define-widget 'radio 'radio-button-choice |
3697 | "A union of several sexp types." | |
3698 | :tag "Choice" | |
a3c88c59 PA |
3699 | :format "%{%t%}:\n%v" |
3700 | :prompt-value 'widget-choice-prompt-value) | |
d543e20b PA |
3701 | |
3702 | (define-widget 'repeat 'editable-list | |
3703 | "A variable length homogeneous list." | |
3704 | :tag "Repeat" | |
3705 | :format "%{%t%}:\n%v%i\n") | |
3706 | ||
3707 | (define-widget 'set 'checklist | |
3708 | "A list of members from a fixed set." | |
3709 | :tag "Set" | |
3710 | :format "%{%t%}:\n%v") | |
3711 | ||
3712 | (define-widget 'boolean 'toggle | |
3713 | "To be nil or non-nil, that is the question." | |
3714 | :tag "Boolean" | |
6d528fc5 | 3715 | :prompt-value 'widget-boolean-prompt-value |
8697863a PA |
3716 | :button-prefix 'widget-push-button-prefix |
3717 | :button-suffix 'widget-push-button-suffix | |
c6753d66 RS |
3718 | :format "%{%t%}: %[Toggle%] %v\n" |
3719 | :on "on (non-nil)" | |
3720 | :off "off (nil)") | |
d543e20b | 3721 | |
6d528fc5 PA |
3722 | (defun widget-boolean-prompt-value (widget prompt value unbound) |
3723 | ;; Toggle a boolean. | |
a3c88c59 | 3724 | (y-or-n-p prompt)) |
fc56773e | 3725 | \f |
d543e20b PA |
3726 | ;;; The `color' Widget. |
3727 | ||
77339a6e | 3728 | ;; Fixme: match |
bfa6c260 | 3729 | (define-widget 'color 'editable-field |
0f648ca2 | 3730 | "Choose a color name (with sample)." |
ce4374c7 | 3731 | :format "%{%t%}: %v (%{sample%})\n" |
0f648ca2 PA |
3732 | :size 10 |
3733 | :tag "Color" | |
3734 | :value "black" | |
3735 | :complete 'widget-color-complete | |
3736 | :sample-face-get 'widget-color-sample-face-get | |
3737 | :notify 'widget-color-notify | |
3738 | :action 'widget-color-action) | |
3739 | ||
3740 | (defun widget-color-complete (widget) | |
3741 | "Complete the color in WIDGET." | |
99f01612 | 3742 | (require 'facemenu) ; for facemenu-color-alist |
0f648ca2 PA |
3743 | (let* ((prefix (buffer-substring-no-properties (widget-field-start widget) |
3744 | (point))) | |
451a66e3 | 3745 | (list (or facemenu-color-alist (defined-colors))) |
0f648ca2 PA |
3746 | (completion (try-completion prefix list))) |
3747 | (cond ((eq completion t) | |
3748 | (message "Exact match.")) | |
3749 | ((null completion) | |
3750 | (error "Can't find completion for \"%s\"" prefix)) | |
3751 | ((not (string-equal prefix completion)) | |
3752 | (insert-and-inherit (substring completion (length prefix)))) | |
3753 | (t | |
3754 | (message "Making completion list...") | |
7fdbdbea | 3755 | (with-output-to-temp-buffer "*Completions*" |
f5fab556 MY |
3756 | (display-completion-list (all-completions prefix list nil) |
3757 | prefix)) | |
0f648ca2 | 3758 | (message "Making completion list...done"))))) |
d543e20b | 3759 | |
0f648ca2 | 3760 | (defun widget-color-sample-face-get (widget) |
4ee1cf9f PA |
3761 | (let* ((value (condition-case nil |
3762 | (widget-value widget) | |
76834555 GM |
3763 | (error (widget-get widget :value))))) |
3764 | (if (color-defined-p value) | |
546cf5b0 | 3765 | (list (cons 'foreground-color value)) |
76834555 | 3766 | 'default))) |
d543e20b | 3767 | |
d543e20b | 3768 | (defun widget-color-action (widget &optional event) |
bd1f16ce | 3769 | "Prompt for a color." |
d543e20b PA |
3770 | (let* ((tag (widget-apply widget :menu-tag-get)) |
3771 | (prompt (concat tag ": ")) | |
4ee1cf9f PA |
3772 | (value (widget-value widget)) |
3773 | (start (widget-field-start widget)) | |
99f01612 | 3774 | (answer (facemenu-read-color prompt))) |
d543e20b PA |
3775 | (unless (zerop (length answer)) |
3776 | (widget-value-set widget answer) | |
0a3a0b56 PA |
3777 | (widget-setup) |
3778 | (widget-apply widget :notify widget event)))) | |
d543e20b | 3779 | |
0f648ca2 | 3780 | (defun widget-color-notify (widget child &optional event) |
00d00aa9 | 3781 | "Update the sample, and notify the parent." |
bfa6c260 | 3782 | (overlay-put (widget-get widget :sample-overlay) |
0f648ca2 PA |
3783 | 'face (widget-apply widget :sample-face-get)) |
3784 | (widget-default-notify widget child event)) | |
fc56773e | 3785 | \f |
d543e20b PA |
3786 | ;;; The Help Echo |
3787 | ||
d543e20b | 3788 | (defun widget-echo-help (pos) |
233d5cde | 3789 | "Display help-echo text for widget at POS." |
d543e20b PA |
3790 | (let* ((widget (widget-at pos)) |
3791 | (help-echo (and widget (widget-get widget :help-echo)))) | |
233d5cde DL |
3792 | (if (functionp help-echo) |
3793 | (setq help-echo (funcall help-echo widget))) | |
6b61353c | 3794 | (if help-echo (message "%s" (eval help-echo))))) |
d543e20b PA |
3795 | |
3796 | ;;; The End: | |
3797 | ||
3798 | (provide 'wid-edit) | |
3799 | ||
cbee283d | 3800 | ;; arch-tag: a076e75e-18a1-4b46-8be5-3f317bcbc707 |
aeba6f9a | 3801 | ;;; wid-edit.el ends here |