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bcd70d97 | 1 | ;;; wid-edit.el --- Functions for creating and using widgets -*-byte-compile-dynamic: t; lexical-binding:t -*- |
d543e20b | 2 | ;; |
73b0cd50 | 3 | ;; Copyright (C) 1996-1997, 1999-2011 Free Software Foundation, Inc. |
d543e20b PA |
4 | ;; |
5 | ;; Author: Per Abrahamsen <abraham@dina.kvl.dk> | |
a89a9d34 | 6 | ;; Maintainer: FSF |
d543e20b | 7 | ;; Keywords: extensions |
bd78fa1d | 8 | ;; Package: emacs |
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 | ||
d543e20b | 59 | ;;; Compatibility. |
bfa6c260 | 60 | |
4084d128 RS |
61 | (defun widget-event-point (event) |
62 | "Character position of the end of event if that exists, or nil." | |
17030183 | 63 | (posn-point (event-end event))) |
4084d128 | 64 | |
bfa6c260 DL |
65 | (defun widget-button-release-event-p (event) |
66 | "Non-nil if EVENT is a mouse-button-release event object." | |
67 | (and (eventp event) | |
68 | (memq (event-basic-type event) '(mouse-1 mouse-2 mouse-3)) | |
69 | (or (memq 'click (event-modifiers event)) | |
70 | (memq 'drag (event-modifiers event))))) | |
d543e20b PA |
71 | |
72 | ;;; Customization. | |
73 | ||
74 | (defgroup widgets nil | |
75 | "Customization support for the Widget Library." | |
76 | :link '(custom-manual "(widget)Top") | |
62f44662 | 77 | :link '(emacs-library-link :tag "Lisp File" "widget.el") |
d543e20b | 78 | :prefix "widget-" |
6f320937 | 79 | :group 'extensions) |
d543e20b | 80 | |
8697863a | 81 | (defgroup widget-documentation nil |
cb9026a3 | 82 | "Options controlling the display of documentation strings." |
8697863a PA |
83 | :group 'widgets) |
84 | ||
6aaedd12 PA |
85 | (defgroup widget-faces nil |
86 | "Faces used by the widget library." | |
87 | :group 'widgets | |
88 | :group 'faces) | |
89 | ||
0efefc52 | 90 | (defvar widget-documentation-face 'widget-documentation |
a89a9d34 | 91 | "Face used for documentation strings in widgets. |
0b296dac RS |
92 | This exists as a variable so it can be set locally in certain buffers.") |
93 | ||
0efefc52 MB |
94 | (defface widget-documentation '((((class color) |
95 | (background dark)) | |
96 | (:foreground "lime green")) | |
97 | (((class color) | |
98 | (background light)) | |
99 | (:foreground "dark green")) | |
100 | (t nil)) | |
8697863a PA |
101 | "Face used for documentation text." |
102 | :group 'widget-documentation | |
103 | :group 'widget-faces) | |
c4f6e489 GM |
104 | (define-obsolete-face-alias 'widget-documentation-face |
105 | 'widget-documentation "22.1") | |
8697863a | 106 | |
0efefc52 | 107 | (defvar widget-button-face 'widget-button |
a89a9d34 | 108 | "Face used for buttons in widgets. |
2f477381 RS |
109 | This exists as a variable so it can be set locally in certain buffers.") |
110 | ||
0efefc52 | 111 | (defface widget-button '((t (:weight bold))) |
d543e20b | 112 | "Face used for widget buttons." |
6aaedd12 | 113 | :group 'widget-faces) |
c4f6e489 | 114 | (define-obsolete-face-alias 'widget-button-face 'widget-button "22.1") |
d543e20b PA |
115 | |
116 | (defcustom widget-mouse-face 'highlight | |
117 | "Face used for widget buttons when the mouse is above them." | |
118 | :type 'face | |
6aaedd12 | 119 | :group 'widget-faces) |
d543e20b | 120 | |
2670cf80 EZ |
121 | ;; TTY gets special definitions here and in the next defface, because |
122 | ;; the gray colors defined for other displays cause black text on a black | |
123 | ;; background, at least on light-background TTYs. | |
0efefc52 MB |
124 | (defface widget-field '((((type tty)) |
125 | :background "yellow3" | |
126 | :foreground "black") | |
127 | (((class grayscale color) | |
128 | (background light)) | |
129 | :background "gray85") | |
130 | (((class grayscale color) | |
131 | (background dark)) | |
132 | :background "dim gray") | |
133 | (t | |
134 | :slant italic)) | |
d543e20b | 135 | "Face used for editable fields." |
6aaedd12 | 136 | :group 'widget-faces) |
c4f6e489 | 137 | (define-obsolete-face-alias 'widget-field-face 'widget-field "22.1") |
0efefc52 MB |
138 | |
139 | (defface widget-single-line-field '((((type tty)) | |
140 | :background "green3" | |
141 | :foreground "black") | |
142 | (((class grayscale color) | |
143 | (background light)) | |
144 | :background "gray85") | |
145 | (((class grayscale color) | |
146 | (background dark)) | |
147 | :background "dim gray") | |
148 | (t | |
149 | :slant italic)) | |
c953515e PA |
150 | "Face used for editable fields spanning only a single line." |
151 | :group 'widget-faces) | |
c4f6e489 GM |
152 | (define-obsolete-face-alias 'widget-single-line-field-face |
153 | 'widget-single-line-field "22.1") | |
c953515e | 154 | |
33eae9c0 RS |
155 | ;;; This causes display-table to be loaded, and not usefully. |
156 | ;;;(defvar widget-single-line-display-table | |
157 | ;;; (let ((table (make-display-table))) | |
158 | ;;; (aset table 9 "^I") | |
159 | ;;; (aset table 10 "^J") | |
160 | ;;; table) | |
161 | ;;; "Display table used for single-line editable fields.") | |
162 | ||
163 | ;;;(when (fboundp 'set-face-display-table) | |
164 | ;;; (set-face-display-table 'widget-single-line-field-face | |
165 | ;;; widget-single-line-display-table)) | |
c953515e | 166 | |
d543e20b PA |
167 | ;;; Utility functions. |
168 | ;; | |
169 | ;; These are not really widget specific. | |
170 | ||
d543e20b | 171 | (defun widget-princ-to-string (object) |
bfa6c260 DL |
172 | "Return string representation of OBJECT, any Lisp object. |
173 | No quoting characters are used; no delimiters are printed around | |
174 | the contents of strings." | |
175 | (with-output-to-string | |
176 | (princ object))) | |
d543e20b PA |
177 | |
178 | (defun widget-clear-undo () | |
179 | "Clear all undo information." | |
180 | (buffer-disable-undo (current-buffer)) | |
181 | (buffer-enable-undo)) | |
182 | ||
a3c88c59 PA |
183 | (defcustom widget-menu-max-size 40 |
184 | "Largest number of items allowed in a popup-menu. | |
185 | Larger menus are read through the minibuffer." | |
186 | :group 'widgets | |
187 | :type 'integer) | |
188 | ||
703c3a11 KH |
189 | (defcustom widget-menu-max-shortcuts 40 |
190 | "Largest number of items for which it works to choose one with a character. | |
191 | For a larger number of items, the minibuffer is used." | |
192 | :group 'widgets | |
193 | :type 'integer) | |
194 | ||
195 | (defcustom widget-menu-minibuffer-flag nil | |
9201cc28 | 196 | "Control how to ask for a choice from the keyboard. |
0b296dac RS |
197 | Non-nil means use the minibuffer; |
198 | nil means read a single character." | |
199 | :group 'widgets | |
200 | :type 'boolean) | |
201 | ||
d543e20b PA |
202 | (defun widget-choose (title items &optional event) |
203 | "Choose an item from a list. | |
204 | ||
205 | First argument TITLE is the name of the list. | |
77339a6e | 206 | Second argument ITEMS is a list whose members are either |
6d528fc5 PA |
207 | (NAME . VALUE), to indicate selectable items, or just strings to |
208 | indicate unselectable items. | |
d543e20b PA |
209 | Optional third argument EVENT is an input event. |
210 | ||
211 | The user is asked to choose between each NAME from the items alist, | |
212 | and the VALUE of the chosen element will be returned. If EVENT is a | |
213 | mouse event, and the number of elements in items is less than | |
214 | `widget-menu-max-size', a popup menu will be used, otherwise the | |
215 | minibuffer." | |
216 | (cond ((and (< (length items) widget-menu-max-size) | |
fb55ff10 | 217 | event (display-popup-menus-p)) |
7fdbdbea | 218 | ;; Mouse click. |
d543e20b PA |
219 | (x-popup-menu event |
220 | (list title (cons "" items)))) | |
703c3a11 KH |
221 | ((or widget-menu-minibuffer-flag |
222 | (> (length items) widget-menu-max-shortcuts)) | |
0b296dac | 223 | ;; Read the choice of name from the minibuffer. |
e5dfabb4 | 224 | (setq items (widget-remove-if 'stringp items)) |
d543e20b PA |
225 | (let ((val (completing-read (concat title ": ") items nil t))) |
226 | (if (stringp val) | |
227 | (let ((try (try-completion val items))) | |
228 | (when (stringp try) | |
229 | (setq val try)) | |
bfa6c260 | 230 | (cdr (assoc val items)))))) |
0b296dac RS |
231 | (t |
232 | ;; Construct a menu of the choices | |
233 | ;; and then use it for prompting for a single character. | |
7fdbdbea DL |
234 | (let* ((overriding-terminal-local-map (make-sparse-keymap)) |
235 | (next-digit ?0) | |
236 | map choice some-choice-enabled value) | |
0b296dac RS |
237 | ;; Define SPC as a prefix char to get to this menu. |
238 | (define-key overriding-terminal-local-map " " | |
239 | (setq map (make-sparse-keymap title))) | |
7c0a9c8f | 240 | (with-current-buffer (get-buffer-create " widget-choose") |
d4b8422f RS |
241 | (erase-buffer) |
242 | (insert "Available choices:\n\n") | |
243 | (while items | |
244 | (setq choice (car items) items (cdr items)) | |
245 | (if (consp choice) | |
246 | (let* ((name (car choice)) | |
247 | (function (cdr choice))) | |
248 | (insert (format "%c = %s\n" next-digit name)) | |
cfc198e5 RS |
249 | (define-key map (vector next-digit) function) |
250 | (setq some-choice-enabled t))) | |
d4b8422f RS |
251 | ;; Allocate digits to disabled alternatives |
252 | ;; so that the digit of a given alternative never varies. | |
253 | (setq next-digit (1+ next-digit))) | |
b0c8b840 JD |
254 | (insert "\nC-g = Quit") |
255 | (goto-char (point-min)) | |
256 | (forward-line)) | |
cfc198e5 RS |
257 | (or some-choice-enabled |
258 | (error "None of the choices is currently meaningful")) | |
d4b8422f | 259 | (define-key map [?\C-g] 'keyboard-quit) |
0b296dac | 260 | (define-key map [t] 'keyboard-quit) |
4d52438e KH |
261 | (define-key map [?\M-\C-v] 'scroll-other-window) |
262 | (define-key map [?\M--] 'negative-argument) | |
0b296dac | 263 | (setcdr map (nreverse (cdr map))) |
0b296dac RS |
264 | ;; Read a char with the menu, and return the result |
265 | ;; that corresponds to it. | |
d4b8422f | 266 | (save-window-excursion |
4d52438e | 267 | (let ((buf (get-buffer " widget-choose"))) |
d970106b | 268 | (fit-window-to-buffer (display-buffer buf)) |
4d52438e KH |
269 | (let ((cursor-in-echo-area t) |
270 | keys | |
271 | (char 0) | |
272 | (arg 1)) | |
421be070 RS |
273 | (while (not (or (and (integerp char) |
274 | (>= char ?0) (< char next-digit)) | |
4d52438e KH |
275 | (eq value 'keyboard-quit))) |
276 | ;; Unread a SPC to lead to our new menu. | |
00d00aa9 | 277 | (setq unread-command-events (cons ?\s unread-command-events)) |
4d52438e | 278 | (setq keys (read-key-sequence title)) |
bfa6c260 DL |
279 | (setq value |
280 | (lookup-key overriding-terminal-local-map keys t) | |
421be070 | 281 | char (aref keys 1)) |
4d52438e | 282 | (cond ((eq value 'scroll-other-window) |
bfa6c260 DL |
283 | (let ((minibuffer-scroll-window |
284 | (get-buffer-window buf))) | |
4d52438e | 285 | (if (> 0 arg) |
bfa6c260 DL |
286 | (scroll-other-window-down |
287 | (window-height minibuffer-scroll-window)) | |
4d52438e KH |
288 | (scroll-other-window)) |
289 | (setq arg 1))) | |
290 | ((eq value 'negative-argument) | |
291 | (setq arg -1)) | |
292 | (t | |
293 | (setq arg 1))))))) | |
0b296dac RS |
294 | (when (eq value 'keyboard-quit) |
295 | (error "Canceled")) | |
296 | value)))) | |
d543e20b | 297 | |
e5dfabb4 RS |
298 | (defun widget-remove-if (predictate list) |
299 | (let (result (tail list)) | |
300 | (while tail | |
301 | (or (funcall predictate (car tail)) | |
302 | (setq result (cons (car tail) result))) | |
303 | (setq tail (cdr tail))) | |
304 | (nreverse result))) | |
305 | ||
d543e20b | 306 | ;;; Widget text specifications. |
77339a6e | 307 | ;; |
bfa6c260 | 308 | ;; These functions are for specifying text properties. |
d543e20b | 309 | |
7c0a9c8f SM |
310 | ;; We can set it to nil now that get_local_map uses get_pos_property. |
311 | (defconst widget-field-add-space nil | |
8697863a | 312 | "Non-nil means add extra space at the end of editable text fields. |
8697863a | 313 | If you don't add the space, it will become impossible to edit a zero |
bfa6c260 | 314 | size field.") |
8697863a | 315 | |
bfa6c260 | 316 | (defvar widget-field-use-before-change t |
da5ec617 | 317 | "Non-nil means use `before-change-functions' to track editable fields. |
c790cad4 GM |
318 | This enables the use of undo. Using before hooks also means that |
319 | the :notify function can't know the new value.") | |
da5ec617 | 320 | |
d543e20b | 321 | (defun widget-specify-field (widget from to) |
0a3a0b56 | 322 | "Specify editable button for WIDGET between FROM and TO." |
0ce5b5d5 PA |
323 | ;; Terminating space is not part of the field, but necessary in |
324 | ;; order for local-map to work. Remove next sexp if local-map works | |
325 | ;; at the end of the overlay. | |
326 | (save-excursion | |
327 | (goto-char to) | |
62f44662 PA |
328 | (cond ((null (widget-get widget :size)) |
329 | (forward-char 1)) | |
330 | (widget-field-add-space | |
331 | (insert-and-inherit " "))) | |
0ce5b5d5 | 332 | (setq to (point))) |
a850ac03 | 333 | (let ((keymap (widget-get widget :keymap)) |
0efefc52 | 334 | (face (or (widget-get widget :value-face) 'widget-field)) |
a850ac03 | 335 | (help-echo (widget-get widget :help-echo)) |
0fa42821 | 336 | (follow-link (widget-get widget :follow-link)) |
a850ac03 MB |
337 | (rear-sticky |
338 | (or (not widget-field-add-space) (widget-get widget :size)))) | |
233d5cde | 339 | (if (functionp help-echo) |
77339a6e | 340 | (setq help-echo 'widget-mouse-help)) |
1d3c7fd6 | 341 | (when (= (char-before to) ?\n) |
a850ac03 MB |
342 | ;; When the last character in the field is a newline, we want to |
343 | ;; give it a `field' char-property of `boundary', which helps the | |
344 | ;; C-n/C-p act more naturally when entering/leaving the field. We | |
1d3c7fd6 | 345 | ;; do this by making a small secondary overlay to contain just that |
a850ac03 MB |
346 | ;; one character. |
347 | (let ((overlay (make-overlay (1- to) to nil t nil))) | |
348 | (overlay-put overlay 'field 'boundary) | |
263a40a6 RS |
349 | ;; We need the real field for tabbing. |
350 | (overlay-put overlay 'real-field widget) | |
5701edda DL |
351 | ;; Use `local-map' here, not `keymap', so that normal editing |
352 | ;; works in the field when, say, Custom uses `suppress-keymap'. | |
353 | (overlay-put overlay 'local-map keymap) | |
a850ac03 | 354 | (overlay-put overlay 'face face) |
0fa42821 | 355 | (overlay-put overlay 'follow-link follow-link) |
a850ac03 MB |
356 | (overlay-put overlay 'help-echo help-echo)) |
357 | (setq to (1- to)) | |
358 | (setq rear-sticky t)) | |
359 | (let ((overlay (make-overlay from to nil nil rear-sticky))) | |
360 | (widget-put widget :field-overlay overlay) | |
361 | ;;(overlay-put overlay 'detachable nil) | |
362 | (overlay-put overlay 'field widget) | |
5701edda | 363 | (overlay-put overlay 'local-map keymap) |
a850ac03 | 364 | (overlay-put overlay 'face face) |
0fa42821 | 365 | (overlay-put overlay 'follow-link follow-link) |
a850ac03 | 366 | (overlay-put overlay 'help-echo help-echo))) |
e9367b9c RS |
367 | (widget-specify-secret widget)) |
368 | ||
369 | (defun widget-specify-secret (field) | |
370 | "Replace text in FIELD with value of `:secret', if non-nil." | |
371 | (let ((secret (widget-get field :secret)) | |
372 | (size (widget-get field :size))) | |
373 | (when secret | |
374 | (let ((begin (widget-field-start field)) | |
375 | (end (widget-field-end field))) | |
bfa6c260 | 376 | (when size |
e9367b9c | 377 | (while (and (> end begin) |
00d00aa9 | 378 | (eq (char-after (1- end)) ?\s)) |
e9367b9c RS |
379 | (setq end (1- end)))) |
380 | (while (< begin end) | |
381 | (let ((old (char-after begin))) | |
382 | (unless (eq old secret) | |
383 | (subst-char-in-region begin (1+ begin) old secret) | |
384 | (put-text-property begin (1+ begin) 'secret old)) | |
385 | (setq begin (1+ begin)))))))) | |
d543e20b | 386 | |
d543e20b | 387 | (defun widget-specify-button (widget from to) |
0a3a0b56 | 388 | "Specify button for WIDGET between FROM and TO." |
233d5cde | 389 | (let ((overlay (make-overlay from to nil t nil)) |
0fa42821 | 390 | (follow-link (widget-get widget :follow-link)) |
233d5cde | 391 | (help-echo (widget-get widget :help-echo))) |
0a3a0b56 | 392 | (widget-put widget :button-overlay overlay) |
233d5cde DL |
393 | (if (functionp help-echo) |
394 | (setq help-echo 'widget-mouse-help)) | |
0a3a0b56 | 395 | (overlay-put overlay 'button widget) |
7fdbdbea | 396 | (overlay-put overlay 'keymap (widget-get widget :keymap)) |
f24485f1 | 397 | (overlay-put overlay 'evaporate t) |
bfa6c260 DL |
398 | ;; We want to avoid the face with image buttons. |
399 | (unless (widget-get widget :suppress-face) | |
5eb8942b | 400 | (overlay-put overlay 'face (widget-apply widget :button-face-get)) |
3bff434b | 401 | (overlay-put overlay 'mouse-face |
cc2fba21 RS |
402 | ;; Make new list structure for the mouse-face value |
403 | ;; so that different widgets will have | |
404 | ;; different `mouse-face' property values | |
405 | ;; and will highlight separately. | |
406 | (let ((mouse-face-value | |
407 | (widget-apply widget :mouse-face-get))) | |
408 | ;; If it's a list, copy it. | |
409 | (if (listp mouse-face-value) | |
410 | (copy-sequence mouse-face-value) | |
411 | ;; If it's a symbol, put it in a list. | |
412 | (list mouse-face-value))))) | |
0e726aa5 | 413 | (overlay-put overlay 'pointer 'hand) |
0fa42821 | 414 | (overlay-put overlay 'follow-link follow-link) |
233d5cde DL |
415 | (overlay-put overlay 'help-echo help-echo))) |
416 | ||
06b60517 | 417 | (defun widget-mouse-help (_window overlay _point) |
233d5cde DL |
418 | "Help-echo callback for widgets whose :help-echo is a function." |
419 | (with-current-buffer (overlay-buffer overlay) | |
420 | (let* ((widget (widget-at (overlay-start overlay))) | |
421 | (help-echo (if widget (widget-get widget :help-echo)))) | |
422 | (if (functionp help-echo) | |
423 | (funcall help-echo widget) | |
424 | help-echo)))) | |
d543e20b | 425 | |
d543e20b | 426 | (defun widget-specify-sample (widget from to) |
bfa6c260 | 427 | "Specify sample for WIDGET between FROM and TO." |
7fdbdbea DL |
428 | (let ((overlay (make-overlay from to nil t nil))) |
429 | (overlay-put overlay 'face (widget-apply widget :sample-face-get)) | |
f24485f1 | 430 | (overlay-put overlay 'evaporate t) |
0f648ca2 PA |
431 | (widget-put widget :sample-overlay overlay))) |
432 | ||
d543e20b | 433 | (defun widget-specify-doc (widget from to) |
bfa6c260 | 434 | "Specify documentation for WIDGET between FROM and TO." |
4ee1cf9f PA |
435 | (let ((overlay (make-overlay from to nil t nil))) |
436 | (overlay-put overlay 'widget-doc widget) | |
437 | (overlay-put overlay 'face widget-documentation-face) | |
f24485f1 | 438 | (overlay-put overlay 'evaporate t) |
4ee1cf9f | 439 | (widget-put widget :doc-overlay overlay))) |
d543e20b PA |
440 | |
441 | (defmacro widget-specify-insert (&rest form) | |
bfa6c260 DL |
442 | "Execute FORM without inheriting any text properties." |
443 | `(save-restriction | |
444 | (let ((inhibit-read-only t) | |
407e43be SM |
445 | (inhibit-modification-hooks t)) |
446 | (narrow-to-region (point) (point)) | |
447 | (prog1 (progn ,@form) | |
448 | (goto-char (point-max)))))) | |
d543e20b | 449 | |
6866bf6a JL |
450 | (defface widget-inactive |
451 | '((t :inherit shadow)) | |
d543e20b | 452 | "Face used for inactive widgets." |
6aaedd12 | 453 | :group 'widget-faces) |
c4f6e489 GM |
454 | (define-obsolete-face-alias 'widget-inactive-face |
455 | 'widget-inactive "22.1") | |
d543e20b PA |
456 | |
457 | (defun widget-specify-inactive (widget from to) | |
458 | "Make WIDGET inactive for user modifications." | |
459 | (unless (widget-get widget :inactive) | |
460 | (let ((overlay (make-overlay from to nil t nil))) | |
0efefc52 | 461 | (overlay-put overlay 'face 'widget-inactive) |
6aaedd12 | 462 | ;; This is disabled, as it makes the mouse cursor change shape. |
0efefc52 | 463 | ;; (overlay-put overlay 'mouse-face 'widget-inactive) |
6d528fc5 PA |
464 | (overlay-put overlay 'evaporate t) |
465 | (overlay-put overlay 'priority 100) | |
a89a9d34 | 466 | (overlay-put overlay 'modification-hooks '(widget-overlay-inactive)) |
d543e20b PA |
467 | (widget-put widget :inactive overlay)))) |
468 | ||
06b60517 | 469 | (defun widget-overlay-inactive (&rest _junk) |
d543e20b PA |
470 | "Ignoring the arguments, signal an error." |
471 | (unless inhibit-read-only | |
a89a9d34 | 472 | (error "The widget here is not active"))) |
d543e20b PA |
473 | |
474 | ||
475 | (defun widget-specify-active (widget) | |
476 | "Make WIDGET active for user modifications." | |
477 | (let ((inactive (widget-get widget :inactive))) | |
478 | (when inactive | |
479 | (delete-overlay inactive) | |
480 | (widget-put widget :inactive nil)))) | |
481 | ||
482 | ;;; Widget Properties. | |
483 | ||
484 | (defsubst widget-type (widget) | |
e5784820 | 485 | "Return the type of WIDGET. The type is a symbol." |
d543e20b PA |
486 | (car widget)) |
487 | ||
0e520006 PA |
488 | ;;;###autoload |
489 | (defun widgetp (widget) | |
4837b516 | 490 | "Return non-nil if WIDGET is a widget." |
0e520006 PA |
491 | (if (symbolp widget) |
492 | (get widget 'widget-type) | |
493 | (and (consp widget) | |
bbc562cc PA |
494 | (symbolp (car widget)) |
495 | (get (car widget) 'widget-type)))) | |
0e520006 | 496 | |
944c91b6 PA |
497 | (defun widget-get-indirect (widget property) |
498 | "In WIDGET, get the value of PROPERTY. | |
bfa6c260 | 499 | If the value is a symbol, return its binding. |
944c91b6 PA |
500 | Otherwise, just return the value." |
501 | (let ((value (widget-get widget property))) | |
502 | (if (symbolp value) | |
503 | (symbol-value value) | |
504 | value))) | |
505 | ||
d543e20b | 506 | (defun widget-member (widget property) |
4837b516 | 507 | "Non-nil if there is a definition in WIDGET for PROPERTY." |
ff83e968 | 508 | (cond ((plist-member (cdr widget) property) |
d543e20b PA |
509 | t) |
510 | ((car widget) | |
511 | (widget-member (get (car widget) 'widget-type) property)) | |
512 | (t nil))) | |
513 | ||
d543e20b PA |
514 | (defun widget-value (widget) |
515 | "Extract the current value of WIDGET." | |
516 | (widget-apply widget | |
517 | :value-to-external (widget-apply widget :value-get))) | |
518 | ||
519 | (defun widget-value-set (widget value) | |
520 | "Set the current value of WIDGET to VALUE." | |
521 | (widget-apply widget | |
522 | :value-set (widget-apply widget | |
523 | :value-to-internal value))) | |
524 | ||
783824f5 | 525 | (defun widget-default-get (widget) |
4c2f559e | 526 | "Extract the default external value of WIDGET." |
77339a6e | 527 | (widget-apply widget :value-to-external |
4c2f559e PA |
528 | (or (widget-get widget :value) |
529 | (widget-apply widget :default-get)))) | |
783824f5 | 530 | |
d543e20b | 531 | (defun widget-match-inline (widget vals) |
a89a9d34 | 532 | "In WIDGET, match the start of VALS." |
d543e20b PA |
533 | (cond ((widget-get widget :inline) |
534 | (widget-apply widget :match-inline vals)) | |
b2aeee30 | 535 | ((and (listp vals) |
d543e20b PA |
536 | (widget-apply widget :match (car vals))) |
537 | (cons (list (car vals)) (cdr vals))) | |
538 | (t nil))) | |
539 | ||
540 | (defun widget-apply-action (widget &optional event) | |
541 | "Apply :action in WIDGET in response to EVENT." | |
8697863a PA |
542 | (if (widget-apply widget :active) |
543 | (widget-apply widget :action event) | |
544 | (error "Attempt to perform action on inactive widget"))) | |
6d528fc5 | 545 | |
a3c88c59 PA |
546 | ;;; Helper functions. |
547 | ;; | |
548 | ;; These are widget specific. | |
549 | ||
550 | ;;;###autoload | |
551 | (defun widget-prompt-value (widget prompt &optional value unbound) | |
552 | "Prompt for a value matching WIDGET, using PROMPT. | |
553 | The current value is assumed to be VALUE, unless UNBOUND is non-nil." | |
554 | (unless (listp widget) | |
555 | (setq widget (list widget))) | |
556 | (setq prompt (format "[%s] %s" (widget-type widget) prompt)) | |
557 | (setq widget (widget-convert widget)) | |
558 | (let ((answer (widget-apply widget :prompt-value prompt value unbound))) | |
559 | (unless (widget-apply widget :match answer) | |
bfa6c260 | 560 | (error "Value does not match %S type" (car widget))) |
a3c88c59 PA |
561 | answer)) |
562 | ||
563 | (defun widget-get-sibling (widget) | |
564 | "Get the item WIDGET is assumed to toggle. | |
565 | This is only meaningful for radio buttons or checkboxes in a list." | |
7fdbdbea | 566 | (let* ((children (widget-get (widget-get widget :parent) :children)) |
a3c88c59 PA |
567 | child) |
568 | (catch 'child | |
569 | (while children | |
570 | (setq child (car children) | |
571 | children (cdr children)) | |
572 | (when (eq (widget-get child :button) widget) | |
573 | (throw 'child child))) | |
574 | nil))) | |
575 | ||
6aaedd12 PA |
576 | (defun widget-map-buttons (function &optional buffer maparg) |
577 | "Map FUNCTION over the buttons in BUFFER. | |
578 | FUNCTION is called with the arguments WIDGET and MAPARG. | |
579 | ||
580 | If FUNCTION returns non-nil, the walk is cancelled. | |
581 | ||
582 | The arguments MAPARG, and BUFFER default to nil and (current-buffer), | |
583 | respectively." | |
584 | (let ((cur (point-min)) | |
585 | (widget nil) | |
6aaedd12 | 586 | (overlays (if buffer |
7c0a9c8f | 587 | (with-current-buffer buffer (overlay-lists)) |
6aaedd12 PA |
588 | (overlay-lists)))) |
589 | (setq overlays (append (car overlays) (cdr overlays))) | |
590 | (while (setq cur (pop overlays)) | |
591 | (setq widget (overlay-get cur 'button)) | |
592 | (if (and widget (funcall function widget maparg)) | |
593 | (setq overlays nil))))) | |
594 | ||
bfa6c260 | 595 | ;;; Images. |
d543e20b | 596 | |
bfa6c260 | 597 | (defcustom widget-image-directory (file-name-as-directory |
0f936484 | 598 | (expand-file-name "images/custom" data-directory)) |
bfa6c260 | 599 | "Where widget button images are located. |
d543e20b | 600 | If this variable is nil, widget will try to locate the directory |
25ac13b5 | 601 | automatically." |
d543e20b PA |
602 | :group 'widgets |
603 | :type 'directory) | |
604 | ||
bfa6c260 | 605 | (defcustom widget-image-enable t |
80b709bc | 606 | "If non-nil, use image buttons in widgets when available." |
bfa6c260 | 607 | :version "21.1" |
d543e20b PA |
608 | :group 'widgets |
609 | :type 'boolean) | |
610 | ||
25ac13b5 PA |
611 | (defcustom widget-image-conversion |
612 | '((xpm ".xpm") (gif ".gif") (png ".png") (jpeg ".jpg" ".jpeg") | |
613 | (xbm ".xbm")) | |
614 | "Conversion alist from image formats to file name suffixes." | |
615 | :group 'widgets | |
616 | :type '(repeat (cons :format "%v" | |
617 | (symbol :tag "Image Format" unknown) | |
618 | (repeat :tag "Suffixes" | |
619 | (string :format "%v"))))) | |
620 | ||
bfa6c260 DL |
621 | (defun widget-image-find (image) |
622 | "Create a graphical button from IMAGE. | |
623 | IMAGE should either already be an image, or be a file name sans | |
3acab5ef | 624 | extension (xpm, xbm, gif, jpg, or png) located in |
bfa6c260 DL |
625 | `widget-image-directory' or otherwise where `find-image' will find it." |
626 | (cond ((not (and image widget-image-enable (display-graphic-p))) | |
627 | ;; We don't want or can't use images. | |
3acab5ef | 628 | nil) |
bfa6c260 DL |
629 | ((and (consp image) |
630 | (eq 'image (car image))) | |
631 | ;; Already an image spec. Use it. | |
3acab5ef | 632 | image) |
25ac13b5 PA |
633 | ((stringp image) |
634 | ;; A string. Look it up in relevant directories. | |
bfa6c260 | 635 | (let* ((load-path (cons widget-image-directory load-path)) |
bfa6c260 DL |
636 | specs) |
637 | (dolist (elt widget-image-conversion) | |
638 | (dolist (ext (cdr elt)) | |
6bfa51ba CY |
639 | (push (list :type (car elt) :file (concat image ext)) |
640 | specs))) | |
647f9993 | 641 | (find-image (nreverse specs)))) |
d543e20b | 642 | (t |
25ac13b5 | 643 | ;; Oh well. |
3acab5ef PA |
644 | nil))) |
645 | ||
0efefc52 | 646 | (defvar widget-button-pressed-face 'widget-button-pressed |
bfa6c260 DL |
647 | "Face used for pressed buttons in widgets. |
648 | This exists as a variable so it can be set locally in certain | |
649 | buffers.") | |
650 | ||
06b60517 | 651 | (defun widget-image-insert (widget tag image &optional _down _inactive) |
3acab5ef | 652 | "In WIDGET, insert the text TAG or, if supported, IMAGE. |
bfa6c260 DL |
653 | IMAGE should either be an image or an image file name sans extension |
654 | \(xpm, xbm, gif, jpg, or png) located in `widget-image-directory'. | |
655 | ||
656 | Optional arguments DOWN and INACTIVE are used instead of IMAGE when the | |
657 | button is pressed or inactive, respectively. These are currently ignored." | |
6f320937 | 658 | (if (and (featurep 'image) |
bfa6c260 DL |
659 | (setq image (widget-image-find image))) |
660 | (progn (widget-put widget :suppress-face t) | |
f331f1f8 | 661 | (insert-image image tag)) |
bfa6c260 | 662 | (insert tag))) |
d543e20b | 663 | |
e6038ca3 CY |
664 | (defun widget-move-and-invoke (event) |
665 | "Move to where you click, and if it is an active field, invoke it." | |
666 | (interactive "e") | |
667 | (mouse-set-point event) | |
87911bdb CY |
668 | (let ((pos (widget-event-point event))) |
669 | (if (and pos (get-char-property pos 'button)) | |
670 | (widget-button-click event)))) | |
e6038ca3 | 671 | |
25ac13b5 PA |
672 | ;;; Buttons. |
673 | ||
674 | (defgroup widget-button nil | |
675 | "The look of various kinds of buttons." | |
676 | :group 'widgets) | |
677 | ||
678 | (defcustom widget-button-prefix "" | |
679 | "String used as prefix for buttons." | |
680 | :type 'string | |
3acab5ef | 681 | :group 'widget-button) |
25ac13b5 PA |
682 | |
683 | (defcustom widget-button-suffix "" | |
684 | "String used as suffix for buttons." | |
685 | :type 'string | |
3acab5ef | 686 | :group 'widget-button) |
25ac13b5 | 687 | |
d543e20b PA |
688 | ;;; Creating Widgets. |
689 | ||
690 | ;;;###autoload | |
691 | (defun widget-create (type &rest args) | |
bfa6c260 | 692 | "Create widget of TYPE. |
d543e20b PA |
693 | The optional ARGS are additional keyword arguments." |
694 | (let ((widget (apply 'widget-convert type args))) | |
695 | (widget-apply widget :create) | |
696 | widget)) | |
697 | ||
698 | (defun widget-create-child-and-convert (parent type &rest args) | |
699 | "As part of the widget PARENT, create a child widget TYPE. | |
700 | The child is converted, using the keyword arguments ARGS." | |
701 | (let ((widget (apply 'widget-convert type args))) | |
702 | (widget-put widget :parent parent) | |
703 | (unless (widget-get widget :indent) | |
704 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
705 | (or (widget-get widget :extra-offset) 0) | |
706 | (widget-get parent :offset)))) | |
707 | (widget-apply widget :create) | |
708 | widget)) | |
709 | ||
710 | (defun widget-create-child (parent type) | |
711 | "Create widget of TYPE." | |
4c2f559e | 712 | (let ((widget (widget-copy type))) |
d543e20b PA |
713 | (widget-put widget :parent parent) |
714 | (unless (widget-get widget :indent) | |
715 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
716 | (or (widget-get widget :extra-offset) 0) | |
717 | (widget-get parent :offset)))) | |
718 | (widget-apply widget :create) | |
719 | widget)) | |
720 | ||
721 | (defun widget-create-child-value (parent type value) | |
722 | "Create widget of TYPE with value VALUE." | |
4c2f559e | 723 | (let ((widget (widget-copy type))) |
d543e20b PA |
724 | (widget-put widget :value (widget-apply widget :value-to-internal value)) |
725 | (widget-put widget :parent parent) | |
726 | (unless (widget-get widget :indent) | |
727 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
728 | (or (widget-get widget :extra-offset) 0) | |
729 | (widget-get parent :offset)))) | |
730 | (widget-apply widget :create) | |
731 | widget)) | |
732 | ||
733 | ;;;###autoload | |
734 | (defun widget-delete (widget) | |
735 | "Delete WIDGET." | |
736 | (widget-apply widget :delete)) | |
737 | ||
4c2f559e PA |
738 | (defun widget-copy (widget) |
739 | "Make a deep copy of WIDGET." | |
740 | (widget-apply (copy-sequence widget) :copy)) | |
741 | ||
d543e20b | 742 | (defun widget-convert (type &rest args) |
bfa6c260 | 743 | "Convert TYPE to a widget without inserting it in the buffer. |
d543e20b PA |
744 | The optional ARGS are additional keyword arguments." |
745 | ;; Don't touch the type. | |
bfa6c260 | 746 | (let* ((widget (if (symbolp type) |
d543e20b | 747 | (list type) |
ef3f635f | 748 | (copy-sequence type))) |
d543e20b | 749 | (current widget) |
ab6a3668 | 750 | done |
d543e20b PA |
751 | (keys args)) |
752 | ;; First set the :args keyword. | |
753 | (while (cdr current) ;Look in the type. | |
ab6a3668 RS |
754 | (if (and (keywordp (cadr current)) |
755 | ;; If the last element is a keyword, | |
756 | ;; it is still the :args element, | |
757 | ;; even though it is a keyword. | |
758 | (cddr current)) | |
759 | (if (eq (cadr current) :args) | |
760 | ;; If :args is explicitly specified, obey it. | |
761 | (setq current nil) | |
762 | ;; Some other irrelevant keyword. | |
763 | (setq current (cdr (cdr current)))) | |
7fdbdbea DL |
764 | (setcdr current (list :args (cdr current))) |
765 | (setq current nil))) | |
ab6a3668 RS |
766 | (while (and args (not done)) ;Look in ARGS. |
767 | (cond ((eq (car args) :args) | |
768 | ;; Handle explicit specification of :args. | |
769 | (setq args (cadr args) | |
770 | done t)) | |
771 | ((keywordp (car args)) | |
772 | (setq args (cddr args))) | |
773 | (t (setq done t)))) | |
774 | (when done | |
775 | (widget-put widget :args args)) | |
d543e20b PA |
776 | ;; Then Convert the widget. |
777 | (setq type widget) | |
778 | (while type | |
779 | (let ((convert-widget (plist-get (cdr type) :convert-widget))) | |
780 | (if convert-widget | |
781 | (setq widget (funcall convert-widget widget)))) | |
782 | (setq type (get (car type) 'widget-type))) | |
783 | ;; Finally set the keyword args. | |
bfa6c260 | 784 | (while keys |
d543e20b | 785 | (let ((next (nth 0 keys))) |
bfa6c260 DL |
786 | (if (keywordp next) |
787 | (progn | |
d543e20b PA |
788 | (widget-put widget next (nth 1 keys)) |
789 | (setq keys (nthcdr 2 keys))) | |
790 | (setq keys nil)))) | |
791 | ;; Convert the :value to internal format. | |
792 | (if (widget-member widget :value) | |
7fdbdbea DL |
793 | (widget-put widget |
794 | :value (widget-apply widget | |
795 | :value-to-internal | |
796 | (widget-get widget :value)))) | |
d543e20b PA |
797 | ;; Return the newly create widget. |
798 | widget)) | |
799 | ||
0e520006 | 800 | ;;;###autoload |
d543e20b | 801 | (defun widget-insert (&rest args) |
7fdbdbea | 802 | "Call `insert' with ARGS even if surrounding text is read only." |
d543e20b | 803 | (let ((inhibit-read-only t) |
7fdbdbea | 804 | (inhibit-modification-hooks t)) |
4ee1cf9f | 805 | (apply 'insert args))) |
d543e20b | 806 | |
8697863a PA |
807 | (defun widget-convert-text (type from to |
808 | &optional button-from button-to | |
809 | &rest args) | |
6aaedd12 | 810 | "Return a widget of type TYPE with endpoint FROM TO. |
00d00aa9 JB |
811 | No text will be inserted to the buffer, instead the text between FROM |
812 | and TO will be used as the widgets end points. If optional arguments | |
6aaedd12 | 813 | BUTTON-FROM and BUTTON-TO are given, these will be used as the widgets |
8697863a PA |
814 | button end points. |
815 | Optional ARGS are extra keyword arguments for TYPE." | |
816 | (let ((widget (apply 'widget-convert type :delete 'widget-leave-text args)) | |
6aaedd12 | 817 | (from (copy-marker from)) |
2ff864e0 | 818 | (to (copy-marker to))) |
6aaedd12 PA |
819 | (set-marker-insertion-type from t) |
820 | (set-marker-insertion-type to nil) | |
821 | (widget-put widget :from from) | |
822 | (widget-put widget :to to) | |
823 | (when button-from | |
824 | (widget-specify-button widget button-from button-to)) | |
825 | widget)) | |
826 | ||
8697863a | 827 | (defun widget-convert-button (type from to &rest args) |
6aaedd12 | 828 | "Return a widget of type TYPE with endpoint FROM TO. |
8697863a | 829 | Optional ARGS are extra keyword arguments for TYPE. |
6aaedd12 PA |
830 | No text will be inserted to the buffer, instead the text between FROM |
831 | and TO will be used as the widgets end points, as well as the widgets | |
832 | button end points." | |
8697863a PA |
833 | (apply 'widget-convert-text type from to from to args)) |
834 | ||
835 | (defun widget-leave-text (widget) | |
836 | "Remove markers and overlays from WIDGET and its children." | |
7fdbdbea | 837 | (let ((button (widget-get widget :button-overlay)) |
0f648ca2 | 838 | (sample (widget-get widget :sample-overlay)) |
4ee1cf9f | 839 | (doc (widget-get widget :doc-overlay)) |
7fdbdbea DL |
840 | (field (widget-get widget :field-overlay))) |
841 | (set-marker (widget-get widget :from) nil) | |
842 | (set-marker (widget-get widget :to) nil) | |
208920be PA |
843 | (when button |
844 | (delete-overlay button)) | |
0f648ca2 PA |
845 | (when sample |
846 | (delete-overlay sample)) | |
4ee1cf9f PA |
847 | (when doc |
848 | (delete-overlay doc)) | |
208920be PA |
849 | (when field |
850 | (delete-overlay field)) | |
7fdbdbea | 851 | (mapc 'widget-leave-text (widget-get widget :children)))) |
6aaedd12 | 852 | |
d543e20b PA |
853 | ;;; Keymap and Commands. |
854 | ||
60d61f43 GM |
855 | ;; This alias exists only so that one can choose in doc-strings (e.g. |
856 | ;; Custom-mode) which key-binding of widget-keymap one wants to refer to. | |
857 | ;; http://lists.gnu.org/archive/html/emacs-devel/2008-11/msg00480.html | |
8cb95edf SM |
858 | (define-obsolete-function-alias 'advertised-widget-backward |
859 | 'widget-backward "23.2") | |
cd8990c1 | 860 | |
0e520006 | 861 | ;;;###autoload |
bfa6c260 DL |
862 | (defvar widget-keymap |
863 | (let ((map (make-sparse-keymap))) | |
864 | (define-key map "\t" 'widget-forward) | |
82b1b71e | 865 | (define-key map "\e\t" 'widget-backward) |
8cb95edf SM |
866 | (define-key map [(shift tab)] 'widget-backward) |
867 | (put 'widget-backward :advertised-binding [(shift tab)]) | |
bfa6c260 DL |
868 | (define-key map [backtab] 'widget-backward) |
869 | (define-key map [down-mouse-2] 'widget-button-click) | |
bb55f90e | 870 | (define-key map [down-mouse-1] 'widget-button-click) |
2b786e07 JR |
871 | ;; The following definition needs to avoid using escape sequences that |
872 | ;; might get converted to ^M when building loaddefs.el | |
873 | (define-key map [(control ?m)] 'widget-button-press) | |
bfa6c260 | 874 | map) |
d543e20b | 875 | "Keymap containing useful binding for buffers containing widgets. |
56a03f46 GM |
876 | Recommended as a parent keymap for modes using widgets. |
877 | Note that such modes will need to require wid-edit.") | |
d543e20b | 878 | |
d543e20b | 879 | (defvar widget-global-map global-map |
f4b020f6 | 880 | "Keymap used for events a widget does not handle itself.") |
d543e20b PA |
881 | (make-variable-buffer-local 'widget-global-map) |
882 | ||
bfa6c260 DL |
883 | (defvar widget-field-keymap |
884 | (let ((map (copy-keymap widget-keymap))) | |
bfa6c260 DL |
885 | (define-key map "\C-k" 'widget-kill-line) |
886 | (define-key map "\M-\t" 'widget-complete) | |
887 | (define-key map "\C-m" 'widget-field-activate) | |
8b9a0f45 | 888 | ;; Since the widget code uses a `field' property to identify fields, |
0697c662 | 889 | ;; ordinary beginning-of-line does the right thing. |
8b9a0f45 | 890 | ;; (define-key map "\C-a" 'widget-beginning-of-line) |
0697c662 | 891 | (define-key map "\C-e" 'widget-end-of-line) |
bfa6c260 | 892 | map) |
d543e20b PA |
893 | "Keymap used inside an editable field.") |
894 | ||
bfa6c260 DL |
895 | (defvar widget-text-keymap |
896 | (let ((map (copy-keymap widget-keymap))) | |
8b9a0f45 | 897 | ;; Since the widget code uses a `field' property to identify fields, |
0697c662 | 898 | ;; ordinary beginning-of-line does the right thing. |
8b9a0f45 | 899 | ;; (define-key map "\C-a" 'widget-beginning-of-line) |
0697c662 | 900 | (define-key map "\C-e" 'widget-end-of-line) |
bfa6c260 | 901 | map) |
d543e20b PA |
902 | "Keymap used inside a text field.") |
903 | ||
d543e20b | 904 | (defun widget-field-activate (pos &optional event) |
e2896b22 | 905 | "Invoke the editable field at point." |
d543e20b | 906 | (interactive "@d") |
a850ac03 | 907 | (let ((field (widget-field-at pos))) |
d543e20b PA |
908 | (if field |
909 | (widget-apply-action field event) | |
910 | (call-interactively | |
911 | (lookup-key widget-global-map (this-command-keys)))))) | |
912 | ||
0efefc52 | 913 | (defface widget-button-pressed |
ea81d57e DN |
914 | '((((min-colors 88) (class color)) |
915 | (:foreground "red1")) | |
916 | (((class color)) | |
a3c88c59 PA |
917 | (:foreground "red")) |
918 | (t | |
e31c1fd5 | 919 | (:weight bold :underline t))) |
a3c88c59 | 920 | "Face used for pressed buttons." |
6aaedd12 | 921 | :group 'widget-faces) |
c4f6e489 GM |
922 | (define-obsolete-face-alias 'widget-button-pressed-face |
923 | 'widget-button-pressed "22.1") | |
a3c88c59 | 924 | |
b0c4ae71 CY |
925 | (defvar widget-button-click-moves-point nil |
926 | "If non-nil, `widget-button-click' moves point to a button after invoking it. | |
927 | If nil, point returns to its original position after invoking a button.") | |
928 | ||
d543e20b | 929 | (defun widget-button-click (event) |
bfa6c260 | 930 | "Invoke the button that the mouse is pointing at." |
bc3420db | 931 | (interactive "e") |
bfa6c260 | 932 | (if (widget-event-point event) |
bc7b6e08 CY |
933 | (let* ((oevent event) |
934 | (mouse-1 (memq (event-basic-type event) '(mouse-1 down-mouse-1))) | |
935 | (pos (widget-event-point event)) | |
bc3420db | 936 | (start (event-start event)) |
77339a6e | 937 | (button (get-char-property |
bc3420db | 938 | pos 'button (and (windowp (posn-window start)) |
b0c4ae71 CY |
939 | (window-buffer (posn-window start))))) |
940 | newpoint) | |
bc7b6e08 CY |
941 | (when (or (null button) |
942 | (catch 'button-press-cancelled | |
943 | ;; Mouse click on a widget button. Do the following | |
944 | ;; in a save-excursion so that the click on the button | |
945 | ;; doesn't change point. | |
946 | (save-selected-window | |
947 | (select-window (posn-window (event-start event))) | |
948 | (save-excursion | |
949 | (goto-char (posn-point (event-start event))) | |
950 | (let* ((overlay (widget-get button :button-overlay)) | |
951 | (pressed-face (or (widget-get button :pressed-face) | |
952 | widget-button-pressed-face)) | |
953 | (face (overlay-get overlay 'face)) | |
954 | (mouse-face (overlay-get overlay 'mouse-face))) | |
955 | (unwind-protect | |
956 | ;; Read events, including mouse-movement | |
957 | ;; events, waiting for a release event. If we | |
958 | ;; began with a mouse-1 event and receive a | |
959 | ;; movement event, that means the user wants | |
960 | ;; to perform drag-selection, so cancel the | |
961 | ;; button press and do the default mouse-1 | |
962 | ;; action. For mouse-2, just highlight/ | |
963 | ;; unhighlight the button the mouse was | |
964 | ;; initially on when we move over it. | |
965 | (save-excursion | |
966 | (when face ; avoid changing around image | |
967 | (overlay-put overlay 'face pressed-face) | |
968 | (overlay-put overlay 'mouse-face pressed-face)) | |
969 | (unless (widget-apply button :mouse-down-action event) | |
970 | (let ((track-mouse t)) | |
971 | (while (not (widget-button-release-event-p event)) | |
972 | (setq event (read-event)) | |
973 | (when (and mouse-1 (mouse-movement-p event)) | |
974 | (push event unread-command-events) | |
975 | (setq event oevent) | |
976 | (throw 'button-press-cancelled t)) | |
0fdbf6bc RS |
977 | (unless (or (integerp event) |
978 | (memq (car event) '(switch-frame select-window)) | |
979 | (eq (car event) 'scroll-bar-movement)) | |
980 | (setq pos (widget-event-point event)) | |
981 | (if (and pos | |
982 | (eq (get-char-property pos 'button) | |
983 | button)) | |
984 | (when face | |
985 | (overlay-put overlay 'face pressed-face) | |
986 | (overlay-put overlay 'mouse-face pressed-face)) | |
987 | (overlay-put overlay 'face face) | |
988 | (overlay-put overlay 'mouse-face mouse-face)))))) | |
bc7b6e08 CY |
989 | |
990 | ;; When mouse is released over the button, run | |
991 | ;; its action function. | |
b0c4ae71 CY |
992 | (when (and pos (eq (get-char-property pos 'button) button)) |
993 | (goto-char pos) | |
994 | (widget-apply-action button event) | |
995 | (if widget-button-click-moves-point | |
996 | (setq newpoint (point))))) | |
bc7b6e08 CY |
997 | (overlay-put overlay 'face face) |
998 | (overlay-put overlay 'mouse-face mouse-face)))) | |
999 | ||
b0c4ae71 | 1000 | (if newpoint (goto-char newpoint)) |
bc7b6e08 CY |
1001 | ;; This loses if the widget action switches windows. -- cyd |
1002 | ;; (unless (pos-visible-in-window-p (widget-event-point event)) | |
1003 | ;; (mouse-set-point event) | |
1004 | ;; (beginning-of-line) | |
1005 | ;; (recenter)) | |
1006 | ) | |
1007 | nil)) | |
38c3526f RS |
1008 | (let ((up t) command) |
1009 | ;; Mouse click not on a widget button. Find the global | |
1010 | ;; command to run, and check whether it is bound to an | |
1011 | ;; up event. | |
bc7b6e08 | 1012 | (if mouse-1 |
bfa6c260 | 1013 | (cond ((setq command ;down event |
38c3526f | 1014 | (lookup-key widget-global-map [down-mouse-1])) |
bfa6c260 DL |
1015 | (setq up nil)) |
1016 | ((setq command ;up event | |
38c3526f RS |
1017 | (lookup-key widget-global-map [mouse-1])))) |
1018 | (cond ((setq command ;down event | |
1019 | (lookup-key widget-global-map [down-mouse-2])) | |
1020 | (setq up nil)) | |
1021 | ((setq command ;up event | |
1022 | (lookup-key widget-global-map [mouse-2]))))) | |
1023 | (when up | |
1024 | ;; Don't execute up events twice. | |
1025 | (while (not (widget-button-release-event-p event)) | |
1026 | (setq event (read-event)))) | |
1027 | (when command | |
1028 | (call-interactively command))))) | |
bfa6c260 | 1029 | (message "You clicked somewhere weird."))) |
a3c88c59 | 1030 | |
d543e20b | 1031 | (defun widget-button-press (pos &optional event) |
25ac13b5 | 1032 | "Invoke button at POS." |
d543e20b | 1033 | (interactive "@d") |
0a3a0b56 | 1034 | (let ((button (get-char-property pos 'button))) |
d543e20b PA |
1035 | (if button |
1036 | (widget-apply-action button event) | |
1037 | (let ((command (lookup-key widget-global-map (this-command-keys)))) | |
1038 | (when (commandp command) | |
1039 | (call-interactively command)))))) | |
1040 | ||
8697863a PA |
1041 | (defun widget-tabable-at (&optional pos) |
1042 | "Return the tabable widget at POS, or nil. | |
1043 | POS defaults to the value of (point)." | |
a850ac03 | 1044 | (let ((widget (widget-at pos))) |
8697863a PA |
1045 | (if widget |
1046 | (let ((order (widget-get widget :tab-order))) | |
1047 | (if order | |
1048 | (if (>= order 0) | |
bfa6c260 DL |
1049 | widget) |
1050 | widget))))) | |
8697863a | 1051 | |
35194e3f | 1052 | (defvar widget-use-overlay-change t |
4ee1cf9f | 1053 | "If non-nil, use overlay change functions to tab around in the buffer. |
c790cad4 | 1054 | This is much faster.") |
4ee1cf9f | 1055 | |
d543e20b PA |
1056 | (defun widget-move (arg) |
1057 | "Move point to the ARG next field or button. | |
1058 | ARG may be negative to move backward." | |
0a3a0b56 | 1059 | (or (bobp) (> arg 0) (backward-char)) |
ea13a2b4 | 1060 | (let ((wrapped 0) |
0a3a0b56 | 1061 | (number arg) |
407e43be | 1062 | (old (widget-tabable-at))) |
0a3a0b56 PA |
1063 | ;; Forward. |
1064 | (while (> arg 0) | |
4ee1cf9f | 1065 | (cond ((eobp) |
ea13a2b4 AS |
1066 | (goto-char (point-min)) |
1067 | (setq wrapped (1+ wrapped))) | |
4ee1cf9f PA |
1068 | (widget-use-overlay-change |
1069 | (goto-char (next-overlay-change (point)))) | |
1070 | (t | |
1071 | (forward-char 1))) | |
ea13a2b4 | 1072 | (and (= wrapped 2) |
0a3a0b56 PA |
1073 | (eq arg number) |
1074 | (error "No buttons or fields found")) | |
8697863a | 1075 | (let ((new (widget-tabable-at))) |
0a3a0b56 PA |
1076 | (when new |
1077 | (unless (eq new old) | |
8697863a | 1078 | (setq arg (1- arg)) |
0a3a0b56 PA |
1079 | (setq old new))))) |
1080 | ;; Backward. | |
1081 | (while (< arg 0) | |
4ee1cf9f | 1082 | (cond ((bobp) |
ea13a2b4 AS |
1083 | (goto-char (point-max)) |
1084 | (setq wrapped (1+ wrapped))) | |
4ee1cf9f PA |
1085 | (widget-use-overlay-change |
1086 | (goto-char (previous-overlay-change (point)))) | |
1087 | (t | |
1088 | (backward-char 1))) | |
ea13a2b4 | 1089 | (and (= wrapped 2) |
0a3a0b56 PA |
1090 | (eq arg number) |
1091 | (error "No buttons or fields found")) | |
8697863a | 1092 | (let ((new (widget-tabable-at))) |
0a3a0b56 PA |
1093 | (when new |
1094 | (unless (eq new old) | |
8697863a PA |
1095 | (setq arg (1+ arg)))))) |
1096 | (let ((new (widget-tabable-at))) | |
1097 | (while (eq (widget-tabable-at) new) | |
1098 | (backward-char))) | |
0ce5b5d5 PA |
1099 | (forward-char)) |
1100 | (widget-echo-help (point)) | |
1101 | (run-hooks 'widget-move-hook)) | |
d543e20b PA |
1102 | |
1103 | (defun widget-forward (arg) | |
1104 | "Move point to the next field or button. | |
1105 | With optional ARG, move across that many fields." | |
1106 | (interactive "p") | |
1107 | (run-hooks 'widget-forward-hook) | |
1108 | (widget-move arg)) | |
1109 | ||
1110 | (defun widget-backward (arg) | |
1111 | "Move point to the previous field or button. | |
1112 | With optional ARG, move across that many fields." | |
1113 | (interactive "p") | |
1114 | (run-hooks 'widget-backward-hook) | |
1115 | (widget-move (- arg))) | |
1116 | ||
8b9a0f45 | 1117 | ;; Since the widget code uses a `field' property to identify fields, |
0697c662 | 1118 | ;; ordinary beginning-of-line does the right thing. |
8b9a0f45 | 1119 | (defalias 'widget-beginning-of-line 'beginning-of-line) |
0697c662 MB |
1120 | |
1121 | (defun widget-end-of-line () | |
1122 | "Go to end of field or end of line, whichever is first. | |
1123 | Trailing spaces at the end of padded fields are not considered part of | |
1124 | the field." | |
1125 | (interactive) | |
1126 | ;; Ordinary end-of-line does the right thing, because we're inside | |
1127 | ;; text with a `field' property. | |
1128 | (end-of-line) | |
1129 | (unless (eolp) | |
1130 | ;; ... except that we want to ignore trailing spaces in fields that | |
1131 | ;; aren't terminated by a newline, because they are used as padding, | |
1132 | ;; and ignored when extracting the entered value of the field. | |
1133 | (skip-chars-backward " " (field-beginning (1- (point)))))) | |
d543e20b PA |
1134 | |
1135 | (defun widget-kill-line () | |
1136 | "Kill to end of field or end of line, whichever is first." | |
1137 | (interactive) | |
0ce5b5d5 | 1138 | (let* ((field (widget-field-find (point))) |
0ce5b5d5 | 1139 | (end (and field (widget-field-end field)))) |
7fdbdbea | 1140 | (if (and field (> (line-beginning-position 2) end)) |
0ce5b5d5 | 1141 | (kill-region (point) end) |
d543e20b PA |
1142 | (call-interactively 'kill-line)))) |
1143 | ||
0ce5b5d5 PA |
1144 | (defcustom widget-complete-field (lookup-key global-map "\M-\t") |
1145 | "Default function to call for completion inside fields." | |
1146 | :options '(ispell-complete-word complete-tag lisp-complete-symbol) | |
1147 | :type 'function | |
1148 | :group 'widgets) | |
1149 | ||
301f9235 | 1150 | (defun widget-narrow-to-field () |
00d00aa9 | 1151 | "Narrow to field." |
301f9235 EZ |
1152 | (interactive) |
1153 | (let ((field (widget-field-find (point)))) | |
1154 | (if field | |
1155 | (narrow-to-region (line-beginning-position) (line-end-position))))) | |
1156 | ||
6095a05b GM |
1157 | ;; This used to say: |
1158 | ;; "When not inside a field, move to the previous button or field." | |
1159 | ;; but AFAICS, it has always just thrown an error. | |
0ce5b5d5 PA |
1160 | (defun widget-complete () |
1161 | "Complete content of editable field from point. | |
6095a05b | 1162 | When not inside a field, signal an error." |
0ce5b5d5 | 1163 | (interactive) |
bcd70d97 SM |
1164 | (let ((data (widget-completions-at-point))) |
1165 | (cond | |
1166 | ((functionp data) (funcall data)) | |
1167 | ((consp data) | |
1168 | (let ((completion-extra-properties (nth 3 data))) | |
1169 | (completion-in-region (nth 0 data) (nth 1 data) (nth 2 data) | |
1170 | (plist-get completion-extra-properties | |
1171 | :predicate)))) | |
1172 | ((widget-field-find (point)) | |
1173 | ;; This defaulting used to be performed in widget-default-complete, but | |
1174 | ;; it seems more appropriate here than in widget-default-completions. | |
1175 | (call-interactively 'widget-complete-field)) | |
1176 | (t | |
1177 | (error "Not in an editable field"))))) | |
1178 | ;; We may want to use widget completion in buffers where the major mode | |
1179 | ;; hasn't added widget-completions-at-point to completion-at-point-functions, | |
1180 | ;; so it's not really obsolete (yet). | |
1181 | ;; (make-obsolete 'widget-complete 'completion-at-point "24.1") | |
1182 | ||
1183 | (defun widget-completions-at-point () | |
0ce5b5d5 | 1184 | (let ((field (widget-field-find (point)))) |
bcd70d97 SM |
1185 | (when field |
1186 | (widget-apply field :completions-function)))) | |
0ce5b5d5 | 1187 | |
d543e20b PA |
1188 | ;;; Setting up the buffer. |
1189 | ||
7c0a9c8f SM |
1190 | (defvar widget-field-new nil |
1191 | "List of all newly created editable fields in the buffer.") | |
d543e20b PA |
1192 | (make-variable-buffer-local 'widget-field-new) |
1193 | ||
7c0a9c8f SM |
1194 | (defvar widget-field-list nil |
1195 | "List of all editable fields in the buffer.") | |
d543e20b PA |
1196 | (make-variable-buffer-local 'widget-field-list) |
1197 | ||
a850ac03 MB |
1198 | (defun widget-at (&optional pos) |
1199 | "The button or field at POS (default, point)." | |
1200 | (or (get-char-property (or pos (point)) 'button) | |
1201 | (widget-field-at pos))) | |
1202 | ||
0e520006 | 1203 | ;;;###autoload |
d543e20b PA |
1204 | (defun widget-setup () |
1205 | "Setup current buffer so editing string widgets works." | |
1206 | (let ((inhibit-read-only t) | |
7fdbdbea | 1207 | (inhibit-modification-hooks t) |
d543e20b PA |
1208 | field) |
1209 | (while widget-field-new | |
1210 | (setq field (car widget-field-new) | |
1211 | widget-field-new (cdr widget-field-new) | |
1212 | widget-field-list (cons field widget-field-list)) | |
0a3a0b56 PA |
1213 | (let ((from (car (widget-get field :field-overlay))) |
1214 | (to (cdr (widget-get field :field-overlay)))) | |
bfa6c260 | 1215 | (widget-specify-field field |
6aaedd12 | 1216 | (marker-position from) (marker-position to)) |
0a3a0b56 PA |
1217 | (set-marker from nil) |
1218 | (set-marker to nil)))) | |
d543e20b | 1219 | (widget-clear-undo) |
4ee1cf9f | 1220 | (widget-add-change)) |
d543e20b PA |
1221 | |
1222 | (defvar widget-field-last nil) | |
1223 | ;; Last field containing point. | |
1224 | (make-variable-buffer-local 'widget-field-last) | |
1225 | ||
1226 | (defvar widget-field-was nil) | |
1227 | ;; The widget data before the change. | |
1228 | (make-variable-buffer-local 'widget-field-was) | |
1229 | ||
a850ac03 MB |
1230 | (defun widget-field-at (pos) |
1231 | "Return the widget field at POS, or nil if none." | |
1232 | (let ((field (get-char-property (or pos (point)) 'field))) | |
1233 | (if (eq field 'boundary) | |
263a40a6 | 1234 | (get-char-property (or pos (point)) 'real-field) |
a850ac03 MB |
1235 | field))) |
1236 | ||
0a3a0b56 | 1237 | (defun widget-field-buffer (widget) |
80a7a1bf | 1238 | "Return the buffer of WIDGET's editing field." |
6aaedd12 | 1239 | (let ((overlay (widget-get widget :field-overlay))) |
ec725166 MB |
1240 | (cond ((overlayp overlay) |
1241 | (overlay-buffer overlay)) | |
1242 | ((consp overlay) | |
1243 | (marker-buffer (car overlay)))))) | |
0a3a0b56 PA |
1244 | |
1245 | (defun widget-field-start (widget) | |
1246 | "Return the start of WIDGET's editing field." | |
6aaedd12 | 1247 | (let ((overlay (widget-get widget :field-overlay))) |
ec725166 MB |
1248 | (if (overlayp overlay) |
1249 | (overlay-start overlay) | |
1250 | (car overlay)))) | |
0a3a0b56 PA |
1251 | |
1252 | (defun widget-field-end (widget) | |
1253 | "Return the end of WIDGET's editing field." | |
6aaedd12 | 1254 | (let ((overlay (widget-get widget :field-overlay))) |
a850ac03 MB |
1255 | ;; Don't subtract one if local-map works at the end of the overlay, |
1256 | ;; or if a special `boundary' field has been added after the widget | |
1257 | ;; field. | |
ec725166 | 1258 | (if (overlayp overlay) |
e47f89f0 EZ |
1259 | ;; Don't proceed if overlay has been removed from buffer. |
1260 | (when (overlay-buffer overlay) | |
1261 | (if (and (not (eq (with-current-buffer | |
1262 | (widget-field-buffer widget) | |
1263 | (save-restriction | |
1264 | ;; `widget-narrow-to-field' can be | |
1265 | ;; active when this function is called | |
1266 | ;; from an change-functions hook. So | |
1267 | ;; temporarily remove field narrowing | |
1268 | ;; before to call `get-char-property'. | |
1269 | (widen) | |
1270 | (get-char-property (overlay-end overlay) | |
1271 | 'field))) | |
1272 | 'boundary)) | |
1273 | (or widget-field-add-space | |
1274 | (null (widget-get widget :size)))) | |
1275 | (1- (overlay-end overlay)) | |
1276 | (overlay-end overlay))) | |
ec725166 | 1277 | (cdr overlay)))) |
0a3a0b56 | 1278 | |
bb12edf1 SM |
1279 | (defun widget-field-text-end (widget) |
1280 | (let ((to (widget-field-end widget)) | |
1281 | (size (widget-get widget :size))) | |
1282 | (if (or (null size) (zerop size)) | |
1283 | to | |
1284 | (let ((from (widget-field-start widget))) | |
1285 | (if (and from to) | |
1286 | (with-current-buffer (widget-field-buffer widget) | |
1287 | (while (and (> to from) | |
1288 | (eq (char-after (1- to)) ?\s)) | |
1289 | (setq to (1- to))) | |
1290 | to)))))) | |
1291 | ||
d543e20b | 1292 | (defun widget-field-find (pos) |
0a3a0b56 | 1293 | "Return the field at POS. |
00d00aa9 | 1294 | Unlike (get-char-property POS 'field), this works with empty fields too." |
d543e20b PA |
1295 | (let ((fields widget-field-list) |
1296 | field found) | |
1297 | (while fields | |
1298 | (setq field (car fields) | |
1299 | fields (cdr fields)) | |
7fdbdbea DL |
1300 | (when (and (<= (widget-field-start field) pos) |
1301 | (<= pos (widget-field-end field))) | |
1302 | (when found | |
1303 | (error "Overlapping fields")) | |
1304 | (setq found field))) | |
d543e20b PA |
1305 | found)) |
1306 | ||
4ee1cf9f | 1307 | (defun widget-before-change (from to) |
944c91b6 PA |
1308 | ;; This is how, for example, a variable changes its state to `modified'. |
1309 | ;; when it is being edited. | |
540a8bd2 RS |
1310 | (unless inhibit-read-only |
1311 | (let ((from-field (widget-field-find from)) | |
1312 | (to-field (widget-field-find to))) | |
1313 | (cond ((not (eq from-field to-field)) | |
1314 | (add-hook 'post-command-hook 'widget-add-change nil t) | |
808bcfd2 KH |
1315 | (signal 'text-read-only |
1316 | '("Change should be restricted to a single field"))) | |
540a8bd2 RS |
1317 | ((null from-field) |
1318 | (add-hook 'post-command-hook 'widget-add-change nil t) | |
808bcfd2 KH |
1319 | (signal 'text-read-only |
1320 | '("Attempt to change text outside editable field"))) | |
540a8bd2 | 1321 | (widget-field-use-before-change |
7fdbdbea | 1322 | (widget-apply from-field :notify from-field)))))) |
4ee1cf9f PA |
1323 | |
1324 | (defun widget-add-change () | |
4ee1cf9f | 1325 | (remove-hook 'post-command-hook 'widget-add-change t) |
4ee1cf9f | 1326 | (add-hook 'before-change-functions 'widget-before-change nil t) |
4ee1cf9f | 1327 | (add-hook 'after-change-functions 'widget-after-change nil t)) |
c6753d66 | 1328 | |
06b60517 | 1329 | (defun widget-after-change (from to _old) |
bfa6c260 | 1330 | "Adjust field size and text properties." |
7fdbdbea DL |
1331 | (let ((field (widget-field-find from)) |
1332 | (other (widget-field-find to))) | |
1333 | (when field | |
1334 | (unless (eq field other) | |
1335 | (error "Change in different fields")) | |
1336 | (let ((size (widget-get field :size))) | |
1337 | (when size | |
1338 | (let ((begin (widget-field-start field)) | |
1339 | (end (widget-field-end field))) | |
1340 | (cond ((< (- end begin) size) | |
1341 | ;; Field too small. | |
1342 | (save-excursion | |
1343 | (goto-char end) | |
00d00aa9 | 1344 | (insert-char ?\s (- (+ begin size) end)))) |
7fdbdbea DL |
1345 | ((> (- end begin) size) |
1346 | ;; Field too large and | |
1347 | (if (or (< (point) (+ begin size)) | |
1348 | (> (point) end)) | |
1349 | ;; Point is outside extra space. | |
1350 | (setq begin (+ begin size)) | |
1351 | ;; Point is within the extra space. | |
1352 | (setq begin (point))) | |
1353 | (save-excursion | |
1354 | (goto-char end) | |
00d00aa9 | 1355 | (while (and (eq (preceding-char) ?\s) |
7fdbdbea | 1356 | (> (point) begin)) |
d355a0b7 | 1357 | (delete-char -1))))))) |
7fdbdbea DL |
1358 | (widget-specify-secret field)) |
1359 | (widget-apply field :notify field)))) | |
d543e20b PA |
1360 | |
1361 | ;;; Widget Functions | |
1362 | ;; | |
bfa6c260 | 1363 | ;; These functions are used in the definition of multiple widgets. |
d543e20b | 1364 | |
a3c88c59 PA |
1365 | (defun widget-parent-action (widget &optional event) |
1366 | "Tell :parent of WIDGET to handle the :action. | |
1367 | Optional EVENT is the event that triggered the action." | |
1368 | (widget-apply (widget-get widget :parent) :action event)) | |
1369 | ||
d543e20b PA |
1370 | (defun widget-children-value-delete (widget) |
1371 | "Delete all :children and :buttons in WIDGET." | |
bfa6c260 | 1372 | (mapc 'widget-delete (widget-get widget :children)) |
d543e20b | 1373 | (widget-put widget :children nil) |
bfa6c260 | 1374 | (mapc 'widget-delete (widget-get widget :buttons)) |
d543e20b PA |
1375 | (widget-put widget :buttons nil)) |
1376 | ||
a3c88c59 PA |
1377 | (defun widget-children-validate (widget) |
1378 | "All the :children must be valid." | |
1379 | (let ((children (widget-get widget :children)) | |
1380 | child found) | |
1381 | (while (and children (not found)) | |
1382 | (setq child (car children) | |
1383 | children (cdr children) | |
1384 | found (widget-apply child :validate))) | |
1385 | found)) | |
1386 | ||
6b61353c KH |
1387 | (defun widget-child-value-get (widget) |
1388 | "Get the value of the first member of :children in WIDGET." | |
1389 | (widget-value (car (widget-get widget :children)))) | |
1390 | ||
1391 | (defun widget-child-value-inline (widget) | |
1392 | "Get the inline value of the first member of :children in WIDGET." | |
1393 | (widget-apply (car (widget-get widget :children)) :value-inline)) | |
1394 | ||
1395 | (defun widget-child-validate (widget) | |
1396 | "The result of validating the first member of :children in WIDGET." | |
1397 | (widget-apply (car (widget-get widget :children)) :validate)) | |
1398 | ||
1399 | (defun widget-type-value-create (widget) | |
1400 | "Convert and instantiate the value of the :type attribute of WIDGET. | |
1401 | Store the newly created widget in the :children attribute. | |
1402 | ||
1403 | The value of the :type attribute should be an unconverted widget type." | |
1404 | (let ((value (widget-get widget :value)) | |
1405 | (type (widget-get widget :type))) | |
0e726aa5 KS |
1406 | (widget-put widget :children |
1407 | (list (widget-create-child-value widget | |
6b61353c KH |
1408 | (widget-convert type) |
1409 | value))))) | |
1410 | ||
1411 | (defun widget-type-default-get (widget) | |
1412 | "Get default value from the :type attribute of WIDGET. | |
1413 | ||
1414 | The value of the :type attribute should be an unconverted widget type." | |
1415 | (widget-default-get (widget-convert (widget-get widget :type)))) | |
1416 | ||
1417 | (defun widget-type-match (widget value) | |
1418 | "Non-nil if the :type value of WIDGET matches VALUE. | |
1419 | ||
1420 | The value of the :type attribute should be an unconverted widget type." | |
1421 | (widget-apply (widget-convert (widget-get widget :type)) :match value)) | |
1422 | ||
4c2f559e PA |
1423 | (defun widget-types-copy (widget) |
1424 | "Copy :args as widget types in WIDGET." | |
1425 | (widget-put widget :args (mapcar 'widget-copy (widget-get widget :args))) | |
1426 | widget) | |
1427 | ||
aeba6f9a DL |
1428 | ;; Made defsubst to speed up face editor creation. |
1429 | (defsubst widget-types-convert-widget (widget) | |
d543e20b PA |
1430 | "Convert :args as widget types in WIDGET." |
1431 | (widget-put widget :args (mapcar 'widget-convert (widget-get widget :args))) | |
1432 | widget) | |
1433 | ||
a3c88c59 PA |
1434 | (defun widget-value-convert-widget (widget) |
1435 | "Initialize :value from :args in WIDGET." | |
1436 | (let ((args (widget-get widget :args))) | |
bfa6c260 | 1437 | (when args |
a3c88c59 PA |
1438 | (widget-put widget :value (car args)) |
1439 | ;; Don't convert :value here, as this is done in `widget-convert'. | |
1440 | ;; (widget-put widget :value (widget-apply widget | |
1441 | ;; :value-to-internal (car args))) | |
1442 | (widget-put widget :args nil))) | |
1443 | widget) | |
1444 | ||
1445 | (defun widget-value-value-get (widget) | |
1446 | "Return the :value property of WIDGET." | |
1447 | (widget-get widget :value)) | |
1448 | ||
d543e20b PA |
1449 | ;;; The `default' Widget. |
1450 | ||
1451 | (define-widget 'default nil | |
1452 | "Basic widget other widgets are derived from." | |
06b60517 JB |
1453 | :value-to-internal (lambda (_widget value) value) |
1454 | :value-to-external (lambda (_widget value) value) | |
25ac13b5 PA |
1455 | :button-prefix 'widget-button-prefix |
1456 | :button-suffix 'widget-button-suffix | |
bcd70d97 | 1457 | :completions-function #'widget-default-completions |
d543e20b PA |
1458 | :create 'widget-default-create |
1459 | :indent nil | |
1460 | :offset 0 | |
1461 | :format-handler 'widget-default-format-handler | |
77339a6e | 1462 | :button-face-get 'widget-default-button-face-get |
73e60f53 | 1463 | :mouse-face-get 'widget-default-mouse-face-get |
77339a6e | 1464 | :sample-face-get 'widget-default-sample-face-get |
d543e20b | 1465 | :delete 'widget-default-delete |
4c2f559e | 1466 | :copy 'identity |
d543e20b PA |
1467 | :value-set 'widget-default-value-set |
1468 | :value-inline 'widget-default-value-inline | |
6b61353c | 1469 | :value-delete 'ignore |
783824f5 | 1470 | :default-get 'widget-default-default-get |
d543e20b | 1471 | :menu-tag-get 'widget-default-menu-tag-get |
99f01612 | 1472 | :validate #'ignore |
d543e20b PA |
1473 | :active 'widget-default-active |
1474 | :activate 'widget-specify-active | |
1475 | :deactivate 'widget-default-deactivate | |
99f01612 | 1476 | :mouse-down-action #'ignore |
d543e20b | 1477 | :action 'widget-default-action |
6d528fc5 PA |
1478 | :notify 'widget-default-notify |
1479 | :prompt-value 'widget-default-prompt-value) | |
d543e20b | 1480 | |
587faadd CY |
1481 | (defvar widget--completing-widget) |
1482 | ||
bcd70d97 SM |
1483 | (defun widget-default-completions (widget) |
1484 | "Return completion data, like `completion-at-point-functions' would." | |
1485 | (let ((completions (widget-get widget :completions))) | |
1486 | (if completions | |
1487 | (list (widget-field-start widget) | |
1488 | (max (point) (widget-field-text-end widget)) | |
1489 | completions) | |
1490 | (if (widget-get widget :complete) | |
1491 | (lambda () (widget-apply widget :complete)) | |
1492 | (if (widget-get widget :complete-function) | |
1493 | (lambda () | |
1494 | (let ((widget--completing-widget widget)) | |
1495 | (call-interactively | |
1496 | (widget-get widget :complete-function))))))))) | |
0ce5b5d5 | 1497 | |
d543e20b PA |
1498 | (defun widget-default-create (widget) |
1499 | "Create WIDGET at point in the current buffer." | |
1500 | (widget-specify-insert | |
1501 | (let ((from (point)) | |
d543e20b PA |
1502 | button-begin button-end |
1503 | sample-begin sample-end | |
1504 | doc-begin doc-end | |
1505 | value-pos) | |
1506 | (insert (widget-get widget :format)) | |
1507 | (goto-char from) | |
1508 | ;; Parse escapes in format. | |
1509 | (while (re-search-forward "%\\(.\\)" nil t) | |
7fdbdbea | 1510 | (let ((escape (char-after (match-beginning 1)))) |
d355a0b7 | 1511 | (delete-char -2) |
d543e20b | 1512 | (cond ((eq escape ?%) |
bfa6c260 | 1513 | (insert ?%)) |
d543e20b | 1514 | ((eq escape ?\[) |
25ac13b5 | 1515 | (setq button-begin (point)) |
944c91b6 | 1516 | (insert (widget-get-indirect widget :button-prefix))) |
d543e20b | 1517 | ((eq escape ?\]) |
944c91b6 | 1518 | (insert (widget-get-indirect widget :button-suffix)) |
d543e20b PA |
1519 | (setq button-end (point))) |
1520 | ((eq escape ?\{) | |
1521 | (setq sample-begin (point))) | |
1522 | ((eq escape ?\}) | |
1523 | (setq sample-end (point))) | |
1524 | ((eq escape ?n) | |
1525 | (when (widget-get widget :indent) | |
bfa6c260 | 1526 | (insert ?\n) |
00d00aa9 | 1527 | (insert-char ?\s (widget-get widget :indent)))) |
d543e20b | 1528 | ((eq escape ?t) |
bfa6c260 | 1529 | (let ((image (widget-get widget :tag-glyph)) |
25ac13b5 | 1530 | (tag (widget-get widget :tag))) |
bfa6c260 DL |
1531 | (cond (image |
1532 | (widget-image-insert widget (or tag "image") image)) | |
25ac13b5 PA |
1533 | (tag |
1534 | (insert tag)) | |
1535 | (t | |
bfa6c260 DL |
1536 | (princ (widget-get widget :value) |
1537 | (current-buffer)))))) | |
d543e20b | 1538 | ((eq escape ?d) |
25ac13b5 PA |
1539 | (let ((doc (widget-get widget :doc))) |
1540 | (when doc | |
1541 | (setq doc-begin (point)) | |
1542 | (insert doc) | |
1543 | (while (eq (preceding-char) ?\n) | |
d355a0b7 | 1544 | (delete-char -1)) |
bfa6c260 | 1545 | (insert ?\n) |
25ac13b5 | 1546 | (setq doc-end (point))))) |
4a1b7052 CY |
1547 | ((eq escape ?h) |
1548 | (widget-add-documentation-string-button widget)) | |
d543e20b PA |
1549 | ((eq escape ?v) |
1550 | (if (and button-begin (not button-end)) | |
1551 | (widget-apply widget :value-create) | |
1552 | (setq value-pos (point)))) | |
bfa6c260 | 1553 | (t |
d543e20b PA |
1554 | (widget-apply widget :format-handler escape))))) |
1555 | ;; Specify button, sample, and doc, and insert value. | |
1556 | (and button-begin button-end | |
1557 | (widget-specify-button widget button-begin button-end)) | |
1558 | (and sample-begin sample-end | |
1559 | (widget-specify-sample widget sample-begin sample-end)) | |
1560 | (and doc-begin doc-end | |
1561 | (widget-specify-doc widget doc-begin doc-end)) | |
1562 | (when value-pos | |
1563 | (goto-char value-pos) | |
1564 | (widget-apply widget :value-create))) | |
7fdbdbea DL |
1565 | (let ((from (point-min-marker)) |
1566 | (to (point-max-marker))) | |
3bff434b | 1567 | (set-marker-insertion-type from t) |
d543e20b PA |
1568 | (set-marker-insertion-type to nil) |
1569 | (widget-put widget :from from) | |
6d528fc5 PA |
1570 | (widget-put widget :to to))) |
1571 | (widget-clear-undo)) | |
d543e20b | 1572 | |
06b60517 | 1573 | (defun widget-default-format-handler (_widget escape) |
4a1b7052 | 1574 | (error "Unknown escape `%c'" escape)) |
d543e20b PA |
1575 | |
1576 | (defun widget-default-button-face-get (widget) | |
1577 | ;; Use :button-face or widget-button-face | |
0b296dac RS |
1578 | (or (widget-get widget :button-face) |
1579 | (let ((parent (widget-get widget :parent))) | |
1580 | (if parent | |
1581 | (widget-apply parent :button-face-get) | |
2f477381 | 1582 | widget-button-face)))) |
d543e20b | 1583 | |
73e60f53 CY |
1584 | (defun widget-default-mouse-face-get (widget) |
1585 | ;; Use :mouse-face or widget-mouse-face | |
1586 | (or (widget-get widget :mouse-face) | |
1587 | (let ((parent (widget-get widget :parent))) | |
1588 | (if parent | |
1589 | (widget-apply parent :mouse-face-get) | |
1590 | widget-mouse-face)))) | |
1591 | ||
d543e20b PA |
1592 | (defun widget-default-sample-face-get (widget) |
1593 | ;; Use :sample-face. | |
1594 | (widget-get widget :sample-face)) | |
1595 | ||
1596 | (defun widget-default-delete (widget) | |
bfa6c260 | 1597 | "Remove widget from the buffer." |
d543e20b PA |
1598 | (let ((from (widget-get widget :from)) |
1599 | (to (widget-get widget :to)) | |
9097aeb7 PA |
1600 | (inactive-overlay (widget-get widget :inactive)) |
1601 | (button-overlay (widget-get widget :button-overlay)) | |
0f648ca2 | 1602 | (sample-overlay (widget-get widget :sample-overlay)) |
4ee1cf9f | 1603 | (doc-overlay (widget-get widget :doc-overlay)) |
7fdbdbea | 1604 | (inhibit-modification-hooks t) |
0a3a0b56 | 1605 | (inhibit-read-only t)) |
d543e20b | 1606 | (widget-apply widget :value-delete) |
6b61353c | 1607 | (widget-children-value-delete widget) |
9097aeb7 PA |
1608 | (when inactive-overlay |
1609 | (delete-overlay inactive-overlay)) | |
1610 | (when button-overlay | |
1611 | (delete-overlay button-overlay)) | |
0f648ca2 PA |
1612 | (when sample-overlay |
1613 | (delete-overlay sample-overlay)) | |
4ee1cf9f PA |
1614 | (when doc-overlay |
1615 | (delete-overlay doc-overlay)) | |
d543e20b PA |
1616 | (when (< from to) |
1617 | ;; Kludge: this doesn't need to be true for empty formats. | |
1618 | (delete-region from to)) | |
1619 | (set-marker from nil) | |
6d528fc5 PA |
1620 | (set-marker to nil)) |
1621 | (widget-clear-undo)) | |
d543e20b PA |
1622 | |
1623 | (defun widget-default-value-set (widget value) | |
bfa6c260 | 1624 | "Recreate widget with new value." |
d0acc4ea RS |
1625 | (let* ((old-pos (point)) |
1626 | (from (copy-marker (widget-get widget :from))) | |
1627 | (to (copy-marker (widget-get widget :to))) | |
1628 | (offset (if (and (<= from old-pos) (<= old-pos to)) | |
1629 | (if (>= old-pos (1- to)) | |
1630 | (- old-pos to 1) | |
1631 | (- old-pos from))))) | |
1632 | ;;??? Bug: this ought to insert the new value before deleting the old one, | |
bfa6c260 | 1633 | ;; so that markers on either side of the value automatically |
d0acc4ea RS |
1634 | ;; stay on the same side. -- rms. |
1635 | (save-excursion | |
1636 | (goto-char (widget-get widget :from)) | |
1637 | (widget-apply widget :delete) | |
1638 | (widget-put widget :value value) | |
1639 | (widget-apply widget :create)) | |
1640 | (if offset | |
1641 | (if (< offset 0) | |
1642 | (goto-char (+ (widget-get widget :to) offset 1)) | |
1643 | (goto-char (min (+ from offset) (1- (widget-get widget :to)))))))) | |
d543e20b PA |
1644 | |
1645 | (defun widget-default-value-inline (widget) | |
bfa6c260 | 1646 | "Wrap value in a list unless it is inline." |
d543e20b PA |
1647 | (if (widget-get widget :inline) |
1648 | (widget-value widget) | |
1649 | (list (widget-value widget)))) | |
1650 | ||
783824f5 | 1651 | (defun widget-default-default-get (widget) |
bfa6c260 | 1652 | "Get `:value'." |
783824f5 RS |
1653 | (widget-get widget :value)) |
1654 | ||
d543e20b | 1655 | (defun widget-default-menu-tag-get (widget) |
bfa6c260 | 1656 | "Use tag or value for menus." |
d543e20b PA |
1657 | (or (widget-get widget :menu-tag) |
1658 | (widget-get widget :tag) | |
1659 | (widget-princ-to-string (widget-get widget :value)))) | |
1660 | ||
1661 | (defun widget-default-active (widget) | |
4837b516 | 1662 | "Return t if this widget is active (user modifiable)." |
0640c647 GM |
1663 | (or (widget-get widget :always-active) |
1664 | (and (not (widget-get widget :inactive)) | |
1665 | (let ((parent (widget-get widget :parent))) | |
77339a6e | 1666 | (or (null parent) |
0640c647 | 1667 | (widget-apply parent :active)))))) |
d543e20b PA |
1668 | |
1669 | (defun widget-default-deactivate (widget) | |
1670 | "Make WIDGET inactive for user modifications." | |
1671 | (widget-specify-inactive widget | |
1672 | (widget-get widget :from) | |
1673 | (widget-get widget :to))) | |
1674 | ||
1675 | (defun widget-default-action (widget &optional event) | |
bfa6c260 | 1676 | "Notify the parent when a widget changes." |
d543e20b PA |
1677 | (let ((parent (widget-get widget :parent))) |
1678 | (when parent | |
1679 | (widget-apply parent :notify widget event)))) | |
1680 | ||
06b60517 | 1681 | (defun widget-default-notify (widget _child &optional event) |
bfa6c260 | 1682 | "Pass notification to parent." |
d543e20b PA |
1683 | (widget-default-action widget event)) |
1684 | ||
06b60517 | 1685 | (defun widget-default-prompt-value (_widget prompt _value _unbound) |
4a1b7052 | 1686 | "Read an arbitrary value." |
7fdbdbea | 1687 | (eval-minibuffer prompt)) |
6d528fc5 | 1688 | |
4a1b7052 CY |
1689 | (defun widget-docstring (widget) |
1690 | "Return the documentation string specificied by WIDGET, or nil if none. | |
1691 | If WIDGET has a `:doc' property, that specifies the documentation string. | |
1692 | Otherwise, try the `:documentation-property' property. If this | |
1693 | is a function, call it with the widget's value as an argument; if | |
1694 | it is a symbol, use this symbol together with the widget's value | |
1695 | as the argument to `documentation-property'." | |
1696 | (let ((doc (or (widget-get widget :doc) | |
1697 | (let ((doc-prop (widget-get widget :documentation-property)) | |
1698 | (value (widget-get widget :value))) | |
1699 | (cond ((functionp doc-prop) | |
1700 | (funcall doc-prop value)) | |
1701 | ((symbolp doc-prop) | |
1702 | (documentation-property value doc-prop))))))) | |
1703 | (when (and (stringp doc) (> (length doc) 0)) | |
1704 | ;; Remove any redundant `*' in the beginning. | |
1705 | (when (eq (aref doc 0) ?*) | |
1706 | (setq doc (substring doc 1))) | |
1707 | ;; Remove trailing newlines. | |
1708 | (when (string-match "\n+\\'" doc) | |
1709 | (setq doc (substring doc 0 (match-beginning 0)))) | |
1710 | doc))) | |
1711 | ||
d543e20b PA |
1712 | ;;; The `item' Widget. |
1713 | ||
1714 | (define-widget 'item 'default | |
1715 | "Constant items for inclusion in other widgets." | |
a3c88c59 | 1716 | :convert-widget 'widget-value-convert-widget |
d543e20b PA |
1717 | :value-create 'widget-item-value-create |
1718 | :value-delete 'ignore | |
a3c88c59 | 1719 | :value-get 'widget-value-value-get |
d543e20b PA |
1720 | :match 'widget-item-match |
1721 | :match-inline 'widget-item-match-inline | |
1722 | :action 'widget-item-action | |
1723 | :format "%t\n") | |
1724 | ||
d543e20b | 1725 | (defun widget-item-value-create (widget) |
bfa6c260 DL |
1726 | "Insert the printed representation of the value." |
1727 | (princ (widget-get widget :value) (current-buffer))) | |
d543e20b PA |
1728 | |
1729 | (defun widget-item-match (widget value) | |
1730 | ;; Match if the value is the same. | |
1731 | (equal (widget-get widget :value) value)) | |
1732 | ||
06b60517 | 1733 | (defun widget-item-match-inline (widget vals) |
d543e20b PA |
1734 | ;; Match if the value is the same. |
1735 | (let ((value (widget-get widget :value))) | |
1736 | (and (listp value) | |
06b60517 JB |
1737 | (<= (length value) (length vals)) |
1738 | (let ((head (widget-sublist vals 0 (length value)))) | |
d543e20b | 1739 | (and (equal head value) |
06b60517 | 1740 | (cons head (widget-sublist vals (length value)))))))) |
e5dfabb4 RS |
1741 | |
1742 | (defun widget-sublist (list start &optional end) | |
1743 | "Return the sublist of LIST from START to END. | |
1744 | If END is omitted, it defaults to the length of LIST." | |
0a3a0b56 PA |
1745 | (if (> start 0) (setq list (nthcdr start list))) |
1746 | (if end | |
bfa6c260 | 1747 | (unless (<= end start) |
0a3a0b56 PA |
1748 | (setq list (copy-sequence list)) |
1749 | (setcdr (nthcdr (- end start 1) list) nil) | |
1750 | list) | |
1751 | (copy-sequence list))) | |
d543e20b PA |
1752 | |
1753 | (defun widget-item-action (widget &optional event) | |
1754 | ;; Just notify itself. | |
1755 | (widget-apply widget :notify widget event)) | |
1756 | ||
d543e20b PA |
1757 | ;;; The `push-button' Widget. |
1758 | ||
7fdbdbea | 1759 | ;; (defcustom widget-push-button-gui t |
80b709bc | 1760 | ;; "If non-nil, use GUI push buttons when available." |
7fdbdbea DL |
1761 | ;; :group 'widgets |
1762 | ;; :type 'boolean) | |
d543e20b PA |
1763 | |
1764 | ;; Cache already created GUI objects. | |
7fdbdbea | 1765 | ;; (defvar widget-push-button-cache nil) |
d543e20b | 1766 | |
25ac13b5 PA |
1767 | (defcustom widget-push-button-prefix "[" |
1768 | "String used as prefix for buttons." | |
1769 | :type 'string | |
1770 | :group 'widget-button) | |
1771 | ||
1772 | (defcustom widget-push-button-suffix "]" | |
1773 | "String used as suffix for buttons." | |
1774 | :type 'string | |
1775 | :group 'widget-button) | |
1776 | ||
d543e20b PA |
1777 | (define-widget 'push-button 'item |
1778 | "A pushable button." | |
25ac13b5 PA |
1779 | :button-prefix "" |
1780 | :button-suffix "" | |
d543e20b PA |
1781 | :value-create 'widget-push-button-value-create |
1782 | :format "%[%v%]") | |
1783 | ||
1784 | (defun widget-push-button-value-create (widget) | |
bfa6c260 | 1785 | "Insert text representing the `on' and `off' states." |
d543e20b PA |
1786 | (let* ((tag (or (widget-get widget :tag) |
1787 | (widget-get widget :value))) | |
da5ec617 | 1788 | (tag-glyph (widget-get widget :tag-glyph)) |
25ac13b5 | 1789 | (text (concat widget-push-button-prefix |
7fdbdbea DL |
1790 | tag widget-push-button-suffix))) |
1791 | (if tag-glyph | |
1792 | (widget-image-insert widget text tag-glyph) | |
1793 | (insert text)))) | |
d543e20b | 1794 | |
7fdbdbea DL |
1795 | ;; (defun widget-gui-action (widget) |
1796 | ;; "Apply :action for WIDGET." | |
1797 | ;; (widget-apply-action widget (this-command-keys))) | |
d543e20b PA |
1798 | |
1799 | ;;; The `link' Widget. | |
1800 | ||
25ac13b5 PA |
1801 | (defcustom widget-link-prefix "[" |
1802 | "String used as prefix for links." | |
1803 | :type 'string | |
1804 | :group 'widget-button) | |
1805 | ||
1806 | (defcustom widget-link-suffix "]" | |
1807 | "String used as suffix for links." | |
1808 | :type 'string | |
1809 | :group 'widget-button) | |
1810 | ||
d543e20b PA |
1811 | (define-widget 'link 'item |
1812 | "An embedded link." | |
25ac13b5 PA |
1813 | :button-prefix 'widget-link-prefix |
1814 | :button-suffix 'widget-link-suffix | |
23e33070 | 1815 | :follow-link 'mouse-face |
d543e20b | 1816 | :help-echo "Follow the link." |
25ac13b5 | 1817 | :format "%[%t%]") |
d543e20b PA |
1818 | |
1819 | ;;; The `info-link' Widget. | |
1820 | ||
1821 | (define-widget 'info-link 'link | |
1822 | "A link to an info file." | |
1823 | :action 'widget-info-link-action) | |
1824 | ||
06b60517 | 1825 | (defun widget-info-link-action (widget &optional _event) |
d543e20b | 1826 | "Open the info node specified by WIDGET." |
7c0a9c8f | 1827 | (info (widget-value widget))) |
d543e20b PA |
1828 | |
1829 | ;;; The `url-link' Widget. | |
1830 | ||
1831 | (define-widget 'url-link 'link | |
1832 | "A link to an www page." | |
1833 | :action 'widget-url-link-action) | |
1834 | ||
06b60517 | 1835 | (defun widget-url-link-action (widget &optional _event) |
00d00aa9 | 1836 | "Open the URL specified by WIDGET." |
af0f19d7 | 1837 | (browse-url (widget-value widget))) |
d543e20b | 1838 | |
a59b7025 KH |
1839 | ;;; The `function-link' Widget. |
1840 | ||
1841 | (define-widget 'function-link 'link | |
1842 | "A link to an Emacs function." | |
1843 | :action 'widget-function-link-action) | |
1844 | ||
06b60517 | 1845 | (defun widget-function-link-action (widget &optional _event) |
a59b7025 KH |
1846 | "Show the function specified by WIDGET." |
1847 | (describe-function (widget-value widget))) | |
1848 | ||
1849 | ;;; The `variable-link' Widget. | |
1850 | ||
1851 | (define-widget 'variable-link 'link | |
1852 | "A link to an Emacs variable." | |
1853 | :action 'widget-variable-link-action) | |
1854 | ||
06b60517 | 1855 | (defun widget-variable-link-action (widget &optional _event) |
a59b7025 KH |
1856 | "Show the variable specified by WIDGET." |
1857 | (describe-variable (widget-value widget))) | |
1858 | ||
62f44662 PA |
1859 | ;;; The `file-link' Widget. |
1860 | ||
1861 | (define-widget 'file-link 'link | |
1862 | "A link to a file." | |
1863 | :action 'widget-file-link-action) | |
1864 | ||
06b60517 | 1865 | (defun widget-file-link-action (widget &optional _event) |
62f44662 PA |
1866 | "Find the file specified by WIDGET." |
1867 | (find-file (widget-value widget))) | |
1868 | ||
1869 | ;;; The `emacs-library-link' Widget. | |
1870 | ||
1871 | (define-widget 'emacs-library-link 'link | |
1872 | "A link to an Emacs Lisp library file." | |
1873 | :action 'widget-emacs-library-link-action) | |
1874 | ||
06b60517 | 1875 | (defun widget-emacs-library-link-action (widget &optional _event) |
00d00aa9 | 1876 | "Find the Emacs library file specified by WIDGET." |
62f44662 PA |
1877 | (find-file (locate-library (widget-value widget)))) |
1878 | ||
4ee1cf9f | 1879 | ;;; The `emacs-commentary-link' Widget. |
77339a6e | 1880 | |
4ee1cf9f PA |
1881 | (define-widget 'emacs-commentary-link 'link |
1882 | "A link to Commentary in an Emacs Lisp library file." | |
1883 | :action 'widget-emacs-commentary-link-action) | |
77339a6e | 1884 | |
06b60517 | 1885 | (defun widget-emacs-commentary-link-action (widget &optional _event) |
4ee1cf9f PA |
1886 | "Find the Commentary section of the Emacs file specified by WIDGET." |
1887 | (finder-commentary (widget-value widget))) | |
1888 | ||
d543e20b PA |
1889 | ;;; The `editable-field' Widget. |
1890 | ||
1891 | (define-widget 'editable-field 'default | |
3bff434b | 1892 | "An editable text field. |
10dbcdd7 | 1893 | Note: In an `editable-field' widget, the `%v' escape must be preceded |
3bff434b | 1894 | by some other text in the `:format' string (if specified)." |
a3c88c59 | 1895 | :convert-widget 'widget-value-convert-widget |
d543e20b PA |
1896 | :keymap widget-field-keymap |
1897 | :format "%v" | |
7fdbdbea | 1898 | :help-echo "M-TAB: complete field; RET: enter value" |
d543e20b | 1899 | :value "" |
a3c88c59 PA |
1900 | :prompt-internal 'widget-field-prompt-internal |
1901 | :prompt-history 'widget-field-history | |
1902 | :prompt-value 'widget-field-prompt-value | |
d543e20b PA |
1903 | :action 'widget-field-action |
1904 | :validate 'widget-field-validate | |
1905 | :valid-regexp "" | |
820d4181 | 1906 | :error "Field's value doesn't match allowed forms" |
d543e20b | 1907 | :value-create 'widget-field-value-create |
6f320937 | 1908 | :value-set 'widget-field-value-set |
d543e20b PA |
1909 | :value-delete 'widget-field-value-delete |
1910 | :value-get 'widget-field-value-get | |
1911 | :match 'widget-field-match) | |
1912 | ||
a3c88c59 PA |
1913 | (defvar widget-field-history nil |
1914 | "History of field minibuffer edits.") | |
1915 | ||
06b60517 | 1916 | (defun widget-field-prompt-internal (_widget prompt initial history) |
a3545af4 | 1917 | "Read string for WIDGET prompting with PROMPT. |
bfa6c260 DL |
1918 | INITIAL is the initial input and HISTORY is a symbol containing |
1919 | the earlier input." | |
a3c88c59 PA |
1920 | (read-string prompt initial history)) |
1921 | ||
1922 | (defun widget-field-prompt-value (widget prompt value unbound) | |
bfa6c260 | 1923 | "Prompt for a string." |
7fdbdbea DL |
1924 | (widget-apply widget |
1925 | :value-to-external | |
1926 | (widget-apply widget | |
1927 | :prompt-internal prompt | |
1928 | (unless unbound | |
1929 | (cons (widget-apply widget | |
1930 | :value-to-internal value) | |
1931 | 0)) | |
1932 | (widget-get widget :prompt-history)))) | |
d543e20b | 1933 | |
0b296dac | 1934 | (defvar widget-edit-functions nil) |
211c9fe9 | 1935 | |
06b60517 | 1936 | (defun widget-field-action (widget &optional _event) |
bfa6c260 | 1937 | "Move to next field." |
f1231b8e | 1938 | (widget-forward 1) |
0b296dac | 1939 | (run-hook-with-args 'widget-edit-functions widget)) |
d543e20b PA |
1940 | |
1941 | (defun widget-field-validate (widget) | |
bfa6c260 | 1942 | "Valid if the content matches `:valid-regexp'." |
7fdbdbea DL |
1943 | (unless (string-match (widget-get widget :valid-regexp) |
1944 | (widget-apply widget :value-get)) | |
1945 | widget)) | |
d543e20b | 1946 | |
6f320937 CY |
1947 | (defun widget-field-value-set (widget value) |
1948 | "Set an editable text field WIDGET to VALUE" | |
1949 | (let ((from (widget-field-start widget)) | |
1950 | (to (widget-field-text-end widget)) | |
06b60517 | 1951 | (buffer (widget-field-buffer widget))) |
6f320937 CY |
1952 | (when (and from to (buffer-live-p buffer)) |
1953 | (with-current-buffer buffer | |
1954 | (goto-char from) | |
1955 | (delete-char (- to from)) | |
1956 | (insert value))))) | |
1957 | ||
d543e20b | 1958 | (defun widget-field-value-create (widget) |
bfa6c260 | 1959 | "Create an editable text field." |
d543e20b PA |
1960 | (let ((size (widget-get widget :size)) |
1961 | (value (widget-get widget :value)) | |
0a3a0b56 | 1962 | (from (point)) |
c953515e PA |
1963 | ;; This is changed to a real overlay in `widget-setup'. We |
1964 | ;; need the end points to behave differently until | |
bfa6c260 | 1965 | ;; `widget-setup' is called. |
0a3a0b56 PA |
1966 | (overlay (cons (make-marker) (make-marker)))) |
1967 | (widget-put widget :field-overlay overlay) | |
d543e20b PA |
1968 | (insert value) |
1969 | (and size | |
1970 | (< (length value) size) | |
00d00aa9 | 1971 | (insert-char ?\s (- size (length value)))) |
d543e20b PA |
1972 | (unless (memq widget widget-field-list) |
1973 | (setq widget-field-new (cons widget widget-field-new))) | |
0a3a0b56 PA |
1974 | (move-marker (cdr overlay) (point)) |
1975 | (set-marker-insertion-type (cdr overlay) nil) | |
1976 | (when (null size) | |
1977 | (insert ?\n)) | |
1978 | (move-marker (car overlay) from) | |
1979 | (set-marker-insertion-type (car overlay) t))) | |
d543e20b PA |
1980 | |
1981 | (defun widget-field-value-delete (widget) | |
bfa6c260 | 1982 | "Remove the widget from the list of active editing fields." |
d543e20b | 1983 | (setq widget-field-list (delq widget widget-field-list)) |
ec725166 | 1984 | (setq widget-field-new (delq widget widget-field-new)) |
d543e20b | 1985 | ;; These are nil if the :format string doesn't contain `%v'. |
0a3a0b56 | 1986 | (let ((overlay (widget-get widget :field-overlay))) |
d8f02b91 | 1987 | (when (overlayp overlay) |
0a3a0b56 | 1988 | (delete-overlay overlay)))) |
d543e20b PA |
1989 | |
1990 | (defun widget-field-value-get (widget) | |
bfa6c260 | 1991 | "Return current text in editing field." |
0a3a0b56 | 1992 | (let ((from (widget-field-start widget)) |
bb12edf1 | 1993 | (to (widget-field-text-end widget)) |
0a3a0b56 | 1994 | (buffer (widget-field-buffer widget)) |
d543e20b PA |
1995 | (secret (widget-get widget :secret)) |
1996 | (old (current-buffer))) | |
1997 | (if (and from to) | |
bfa6c260 | 1998 | (progn |
0a3a0b56 | 1999 | (set-buffer buffer) |
d543e20b PA |
2000 | (let ((result (buffer-substring-no-properties from to))) |
2001 | (when secret | |
2002 | (let ((index 0)) | |
2003 | (while (< (+ from index) to) | |
2004 | (aset result index | |
0a3a0b56 | 2005 | (get-char-property (+ from index) 'secret)) |
d543e20b PA |
2006 | (setq index (1+ index))))) |
2007 | (set-buffer old) | |
2008 | result)) | |
2009 | (widget-get widget :value)))) | |
2010 | ||
06b60517 | 2011 | (defun widget-field-match (_widget value) |
d543e20b PA |
2012 | ;; Match any string. |
2013 | (stringp value)) | |
2014 | ||
2015 | ;;; The `text' Widget. | |
2016 | ||
2017 | (define-widget 'text 'editable-field | |
7fce8d93 SM |
2018 | "A multiline text area." |
2019 | :keymap widget-text-keymap) | |
d543e20b PA |
2020 | |
2021 | ;;; The `menu-choice' Widget. | |
2022 | ||
2023 | (define-widget 'menu-choice 'default | |
2024 | "A menu of options." | |
2025 | :convert-widget 'widget-types-convert-widget | |
4c2f559e | 2026 | :copy 'widget-types-copy |
d543e20b PA |
2027 | :format "%[%t%]: %v" |
2028 | :case-fold t | |
2029 | :tag "choice" | |
2030 | :void '(item :format "invalid (%t)\n") | |
2031 | :value-create 'widget-choice-value-create | |
6b61353c KH |
2032 | :value-get 'widget-child-value-get |
2033 | :value-inline 'widget-child-value-inline | |
783824f5 | 2034 | :default-get 'widget-choice-default-get |
a3c88c59 | 2035 | :mouse-down-action 'widget-choice-mouse-down-action |
d543e20b PA |
2036 | :action 'widget-choice-action |
2037 | :error "Make a choice" | |
2038 | :validate 'widget-choice-validate | |
2039 | :match 'widget-choice-match | |
2040 | :match-inline 'widget-choice-match-inline) | |
2041 | ||
2042 | (defun widget-choice-value-create (widget) | |
bfa6c260 | 2043 | "Insert the first choice that matches the value." |
d543e20b PA |
2044 | (let ((value (widget-get widget :value)) |
2045 | (args (widget-get widget :args)) | |
4084d128 | 2046 | (explicit (widget-get widget :explicit-choice)) |
d543e20b | 2047 | current) |
25e3656c | 2048 | (if explicit |
4084d128 RS |
2049 | (progn |
2050 | ;; If the user specified the choice for this value, | |
25e3656c | 2051 | ;; respect that choice. |
4084d128 RS |
2052 | (widget-put widget :children (list (widget-create-child-value |
2053 | widget explicit value))) | |
25e3656c LT |
2054 | (widget-put widget :choice explicit) |
2055 | (widget-put widget :explicit-choice nil)) | |
4084d128 RS |
2056 | (while args |
2057 | (setq current (car args) | |
2058 | args (cdr args)) | |
2059 | (when (widget-apply current :match value) | |
2060 | (widget-put widget :children (list (widget-create-child-value | |
2061 | widget current value))) | |
2062 | (widget-put widget :choice current) | |
2063 | (setq args nil | |
2064 | current nil))) | |
2065 | (when current | |
2066 | (let ((void (widget-get widget :void))) | |
2067 | (widget-put widget :children (list (widget-create-child-and-convert | |
2068 | widget void :value value))) | |
2069 | (widget-put widget :choice void)))))) | |
d543e20b | 2070 | |
783824f5 RS |
2071 | (defun widget-choice-default-get (widget) |
2072 | ;; Get default for the first choice. | |
2073 | (widget-default-get (car (widget-get widget :args)))) | |
2074 | ||
a3c88c59 PA |
2075 | (defcustom widget-choice-toggle nil |
2076 | "If non-nil, a binary choice will just toggle between the values. | |
2077 | Otherwise, the user will explicitly have to choose between the values | |
25ac13b5 | 2078 | when he invoked the menu." |
a3c88c59 PA |
2079 | :type 'boolean |
2080 | :group 'widgets) | |
2081 | ||
06b60517 | 2082 | (defun widget-choice-mouse-down-action (widget &optional _event) |
a3c88c59 PA |
2083 | ;; Return non-nil if we need a menu. |
2084 | (let ((args (widget-get widget :args)) | |
2085 | (old (widget-get widget :choice))) | |
e2c00a47 | 2086 | (cond ((not (display-popup-menus-p)) |
a3c88c59 PA |
2087 | ;; No place to pop up a menu. |
2088 | nil) | |
a3c88c59 PA |
2089 | ((< (length args) 2) |
2090 | ;; Empty or singleton list, just return the value. | |
2091 | nil) | |
2092 | ((> (length args) widget-menu-max-size) | |
2093 | ;; Too long, prompt. | |
2094 | nil) | |
2095 | ((> (length args) 2) | |
2096 | ;; Reasonable sized list, use menu. | |
2097 | t) | |
2098 | ((and widget-choice-toggle (memq old args)) | |
2099 | ;; We toggle. | |
2100 | nil) | |
2101 | (t | |
2102 | ;; Ask which of the two. | |
2103 | t)))) | |
2104 | ||
d543e20b PA |
2105 | (defun widget-choice-action (widget &optional event) |
2106 | ;; Make a choice. | |
2107 | (let ((args (widget-get widget :args)) | |
2108 | (old (widget-get widget :choice)) | |
2109 | (tag (widget-apply widget :menu-tag-get)) | |
2110 | (completion-ignore-case (widget-get widget :case-fold)) | |
4084d128 | 2111 | this-explicit |
d543e20b PA |
2112 | current choices) |
2113 | ;; Remember old value. | |
2114 | (if (and old (not (widget-apply widget :validate))) | |
2115 | (let* ((external (widget-value widget)) | |
2116 | (internal (widget-apply old :value-to-internal external))) | |
2117 | (widget-put old :value internal))) | |
2118 | ;; Find new choice. | |
2119 | (setq current | |
2120 | (cond ((= (length args) 0) | |
2121 | nil) | |
2122 | ((= (length args) 1) | |
2123 | (nth 0 args)) | |
a3c88c59 PA |
2124 | ((and widget-choice-toggle |
2125 | (= (length args) 2) | |
d543e20b PA |
2126 | (memq old args)) |
2127 | (if (eq old (nth 0 args)) | |
2128 | (nth 1 args) | |
2129 | (nth 0 args))) | |
2130 | (t | |
2131 | (while args | |
2132 | (setq current (car args) | |
2133 | args (cdr args)) | |
2134 | (setq choices | |
2135 | (cons (cons (widget-apply current :menu-tag-get) | |
2136 | current) | |
2137 | choices))) | |
4084d128 | 2138 | (setq this-explicit t) |
d543e20b | 2139 | (widget-choose tag (reverse choices) event)))) |
d0acc4ea | 2140 | (when current |
25e3656c LT |
2141 | ;; If this was an explicit user choice, record the choice, |
2142 | ;; so that widget-choice-value-create will respect it. | |
4084d128 | 2143 | (when this-explicit |
25e3656c | 2144 | (widget-put widget :explicit-choice current)) |
4c2f559e | 2145 | (widget-value-set widget (widget-default-get current)) |
d0acc4ea RS |
2146 | (widget-setup) |
2147 | (widget-apply widget :notify widget event))) | |
d4b8422f | 2148 | (run-hook-with-args 'widget-edit-functions widget)) |
d543e20b PA |
2149 | |
2150 | (defun widget-choice-validate (widget) | |
2151 | ;; Valid if we have made a valid choice. | |
7fdbdbea DL |
2152 | (if (eq (widget-get widget :void) (widget-get widget :choice)) |
2153 | widget | |
2154 | (widget-apply (car (widget-get widget :children)) :validate))) | |
d543e20b PA |
2155 | |
2156 | (defun widget-choice-match (widget value) | |
2157 | ;; Matches if one of the choices matches. | |
2158 | (let ((args (widget-get widget :args)) | |
2159 | current found) | |
2160 | (while (and args (not found)) | |
2161 | (setq current (car args) | |
2162 | args (cdr args) | |
2163 | found (widget-apply current :match value))) | |
2164 | found)) | |
2165 | ||
06b60517 | 2166 | (defun widget-choice-match-inline (widget vals) |
d543e20b PA |
2167 | ;; Matches if one of the choices matches. |
2168 | (let ((args (widget-get widget :args)) | |
2169 | current found) | |
2170 | (while (and args (null found)) | |
2171 | (setq current (car args) | |
2172 | args (cdr args) | |
06b60517 | 2173 | found (widget-match-inline current vals))) |
d543e20b PA |
2174 | found)) |
2175 | ||
2176 | ;;; The `toggle' Widget. | |
2177 | ||
2178 | (define-widget 'toggle 'item | |
2179 | "Toggle between two states." | |
2180 | :format "%[%v%]\n" | |
2181 | :value-create 'widget-toggle-value-create | |
2182 | :action 'widget-toggle-action | |
06b60517 | 2183 | :match (lambda (_widget _value) t) |
d543e20b PA |
2184 | :on "on" |
2185 | :off "off") | |
2186 | ||
2187 | (defun widget-toggle-value-create (widget) | |
bfa6c260 | 2188 | "Insert text representing the `on' and `off' states." |
895123f5 CY |
2189 | (let* ((val (widget-value widget)) |
2190 | (text (widget-get widget (if val :on :off))) | |
2191 | (img (widget-image-find | |
2192 | (widget-get widget (if val :on-glyph :off-glyph))))) | |
2193 | (widget-image-insert widget (or text "") | |
2194 | (if img | |
2195 | (append img '(:ascent center)))))) | |
d543e20b PA |
2196 | |
2197 | (defun widget-toggle-action (widget &optional event) | |
2198 | ;; Toggle value. | |
d0acc4ea RS |
2199 | (widget-value-set widget (not (widget-value widget))) |
2200 | (widget-apply widget :notify widget event) | |
d4b8422f | 2201 | (run-hook-with-args 'widget-edit-functions widget)) |
6d528fc5 | 2202 | |
d543e20b PA |
2203 | ;;; The `checkbox' Widget. |
2204 | ||
2205 | (define-widget 'checkbox 'toggle | |
2206 | "A checkbox toggle." | |
25ac13b5 PA |
2207 | :button-suffix "" |
2208 | :button-prefix "" | |
d543e20b PA |
2209 | :format "%[%v%]" |
2210 | :on "[X]" | |
35a7ac84 DL |
2211 | ;; We could probably do the same job as the images using single |
2212 | ;; space characters in a boxed face with a stretch specification to | |
2213 | ;; make them square. | |
01898dc2 | 2214 | :on-glyph "checked" |
805e9a05 | 2215 | :off "[ ]" |
01898dc2 | 2216 | :off-glyph "unchecked" |
99f01612 | 2217 | :help-echo "Toggle this item." |
d543e20b PA |
2218 | :action 'widget-checkbox-action) |
2219 | ||
2220 | (defun widget-checkbox-action (widget &optional event) | |
2221 | "Toggle checkbox, notify parent, and set active state of sibling." | |
2222 | (widget-toggle-action widget event) | |
2223 | (let ((sibling (widget-get-sibling widget))) | |
2224 | (when sibling | |
2225 | (if (widget-value widget) | |
2226 | (widget-apply sibling :activate) | |
6872b31c EZ |
2227 | (widget-apply sibling :deactivate)) |
2228 | (widget-clear-undo)))) | |
d543e20b PA |
2229 | |
2230 | ;;; The `checklist' Widget. | |
2231 | ||
2232 | (define-widget 'checklist 'default | |
2233 | "A multiple choice widget." | |
2234 | :convert-widget 'widget-types-convert-widget | |
4c2f559e | 2235 | :copy 'widget-types-copy |
d543e20b PA |
2236 | :format "%v" |
2237 | :offset 4 | |
2238 | :entry-format "%b %v" | |
d543e20b PA |
2239 | :greedy nil |
2240 | :value-create 'widget-checklist-value-create | |
d543e20b PA |
2241 | :value-get 'widget-checklist-value-get |
2242 | :validate 'widget-checklist-validate | |
2243 | :match 'widget-checklist-match | |
2244 | :match-inline 'widget-checklist-match-inline) | |
2245 | ||
2246 | (defun widget-checklist-value-create (widget) | |
2247 | ;; Insert all values | |
61328d7c CY |
2248 | (let ((alist (widget-checklist-match-find widget)) |
2249 | (args (widget-get widget :args))) | |
2250 | (dolist (item args) | |
2251 | (widget-checklist-add-item widget item (assq item alist))) | |
d543e20b PA |
2252 | (widget-put widget :children (nreverse (widget-get widget :children))))) |
2253 | ||
2254 | (defun widget-checklist-add-item (widget type chosen) | |
bfa6c260 DL |
2255 | "Create checklist item in WIDGET of type TYPE. |
2256 | If the item is checked, CHOSEN is a cons whose cdr is the value." | |
d543e20b PA |
2257 | (and (eq (preceding-char) ?\n) |
2258 | (widget-get widget :indent) | |
00d00aa9 | 2259 | (insert-char ?\s (widget-get widget :indent))) |
bfa6c260 | 2260 | (widget-specify-insert |
d543e20b PA |
2261 | (let* ((children (widget-get widget :children)) |
2262 | (buttons (widget-get widget :buttons)) | |
2263 | (button-args (or (widget-get type :sibling-args) | |
2264 | (widget-get widget :button-args))) | |
2265 | (from (point)) | |
2266 | child button) | |
2267 | (insert (widget-get widget :entry-format)) | |
2268 | (goto-char from) | |
2269 | ;; Parse % escapes in format. | |
2270 | (while (re-search-forward "%\\([bv%]\\)" nil t) | |
7fdbdbea | 2271 | (let ((escape (char-after (match-beginning 1)))) |
d355a0b7 | 2272 | (delete-char -2) |
d543e20b | 2273 | (cond ((eq escape ?%) |
bfa6c260 | 2274 | (insert ?%)) |
d543e20b PA |
2275 | ((eq escape ?b) |
2276 | (setq button (apply 'widget-create-child-and-convert | |
2277 | widget 'checkbox | |
2278 | :value (not (null chosen)) | |
2279 | button-args))) | |
2280 | ((eq escape ?v) | |
2281 | (setq child | |
2282 | (cond ((not chosen) | |
2283 | (let ((child (widget-create-child widget type))) | |
2284 | (widget-apply child :deactivate) | |
2285 | child)) | |
2286 | ((widget-get type :inline) | |
2287 | (widget-create-child-value | |
2288 | widget type (cdr chosen))) | |
2289 | (t | |
2290 | (widget-create-child-value | |
2291 | widget type (car (cdr chosen))))))) | |
bfa6c260 | 2292 | (t |
d543e20b PA |
2293 | (error "Unknown escape `%c'" escape))))) |
2294 | ;; Update properties. | |
2295 | (and button child (widget-put child :button button)) | |
2296 | (and button (widget-put widget :buttons (cons button buttons))) | |
2297 | (and child (widget-put widget :children (cons child children)))))) | |
2298 | ||
06b60517 | 2299 | (defun widget-checklist-match (widget vals) |
d543e20b | 2300 | ;; All values must match a type in the checklist. |
06b60517 JB |
2301 | (and (listp vals) |
2302 | (null (cdr (widget-checklist-match-inline widget vals))))) | |
d543e20b | 2303 | |
06b60517 | 2304 | (defun widget-checklist-match-inline (widget vals) |
d543e20b PA |
2305 | ;; Find the values which match a type in the checklist. |
2306 | (let ((greedy (widget-get widget :greedy)) | |
ef3f635f | 2307 | (args (copy-sequence (widget-get widget :args))) |
d543e20b | 2308 | found rest) |
06b60517 JB |
2309 | (while vals |
2310 | (let ((answer (widget-checklist-match-up args vals))) | |
bfa6c260 | 2311 | (cond (answer |
3f1a8558 GM |
2312 | (let ((vals2 (widget-match-inline answer vals))) |
2313 | (setq found (append found (car vals2)) | |
2314 | vals (cdr vals2) | |
d543e20b PA |
2315 | args (delq answer args)))) |
2316 | (greedy | |
06b60517 JB |
2317 | (setq rest (append rest (list (car vals))) |
2318 | vals (cdr vals))) | |
bfa6c260 | 2319 | (t |
06b60517 JB |
2320 | (setq rest (append rest vals) |
2321 | vals nil))))) | |
d543e20b PA |
2322 | (cons found rest))) |
2323 | ||
61328d7c | 2324 | (defun widget-checklist-match-find (widget &optional vals) |
bfa6c260 DL |
2325 | "Find the vals which match a type in the checklist. |
2326 | Return an alist of (TYPE MATCH)." | |
61328d7c | 2327 | (or vals (setq vals (widget-get widget :value))) |
d543e20b | 2328 | (let ((greedy (widget-get widget :greedy)) |
ef3f635f | 2329 | (args (copy-sequence (widget-get widget :args))) |
d543e20b PA |
2330 | found) |
2331 | (while vals | |
2332 | (let ((answer (widget-checklist-match-up args vals))) | |
bfa6c260 | 2333 | (cond (answer |
d543e20b PA |
2334 | (let ((match (widget-match-inline answer vals))) |
2335 | (setq found (cons (cons answer (car match)) found) | |
2336 | vals (cdr match) | |
2337 | args (delq answer args)))) | |
2338 | (greedy | |
2339 | (setq vals (cdr vals))) | |
bfa6c260 | 2340 | (t |
d543e20b PA |
2341 | (setq vals nil))))) |
2342 | found)) | |
2343 | ||
2344 | (defun widget-checklist-match-up (args vals) | |
bfa6c260 | 2345 | "Return the first type from ARGS that matches VALS." |
d543e20b PA |
2346 | (let (current found) |
2347 | (while (and args (null found)) | |
2348 | (setq current (car args) | |
2349 | args (cdr args) | |
2350 | found (widget-match-inline current vals))) | |
2351 | (if found | |
bfa6c260 | 2352 | current))) |
d543e20b PA |
2353 | |
2354 | (defun widget-checklist-value-get (widget) | |
2355 | ;; The values of all selected items. | |
2356 | (let ((children (widget-get widget :children)) | |
2357 | child result) | |
bfa6c260 | 2358 | (while children |
d543e20b PA |
2359 | (setq child (car children) |
2360 | children (cdr children)) | |
2361 | (if (widget-value (widget-get child :button)) | |
2362 | (setq result (append result (widget-apply child :value-inline))))) | |
2363 | result)) | |
2364 | ||
2365 | (defun widget-checklist-validate (widget) | |
2366 | ;; Ticked chilren must be valid. | |
2367 | (let ((children (widget-get widget :children)) | |
2368 | child button found) | |
2369 | (while (and children (not found)) | |
2370 | (setq child (car children) | |
2371 | children (cdr children) | |
2372 | button (widget-get child :button) | |
2373 | found (and (widget-value button) | |
2374 | (widget-apply child :validate)))) | |
2375 | found)) | |
2376 | ||
2377 | ;;; The `option' Widget | |
2378 | ||
2379 | (define-widget 'option 'checklist | |
2380 | "An widget with an optional item." | |
2381 | :inline t) | |
2382 | ||
2383 | ;;; The `choice-item' Widget. | |
2384 | ||
2385 | (define-widget 'choice-item 'item | |
2386 | "Button items that delegate action events to their parents." | |
a3c88c59 | 2387 | :action 'widget-parent-action |
d543e20b PA |
2388 | :format "%[%t%] \n") |
2389 | ||
d543e20b PA |
2390 | ;;; The `radio-button' Widget. |
2391 | ||
2392 | (define-widget 'radio-button 'toggle | |
2393 | "A radio button for use in the `radio' widget." | |
2394 | :notify 'widget-radio-button-notify | |
2395 | :format "%[%v%]" | |
25ac13b5 PA |
2396 | :button-suffix "" |
2397 | :button-prefix "" | |
d543e20b PA |
2398 | :on "(*)" |
2399 | :on-glyph "radio1" | |
2400 | :off "( )" | |
2401 | :off-glyph "radio0") | |
2402 | ||
06b60517 | 2403 | (defun widget-radio-button-notify (widget _child &optional event) |
d543e20b PA |
2404 | ;; Tell daddy. |
2405 | (widget-apply (widget-get widget :parent) :action widget event)) | |
2406 | ||
2407 | ;;; The `radio-button-choice' Widget. | |
2408 | ||
2409 | (define-widget 'radio-button-choice 'default | |
2410 | "Select one of multiple options." | |
2411 | :convert-widget 'widget-types-convert-widget | |
4c2f559e | 2412 | :copy 'widget-types-copy |
d543e20b PA |
2413 | :offset 4 |
2414 | :format "%v" | |
2415 | :entry-format "%b %v" | |
d543e20b | 2416 | :value-create 'widget-radio-value-create |
d543e20b PA |
2417 | :value-get 'widget-radio-value-get |
2418 | :value-inline 'widget-radio-value-inline | |
2419 | :value-set 'widget-radio-value-set | |
2420 | :error "You must push one of the buttons" | |
2421 | :validate 'widget-radio-validate | |
2422 | :match 'widget-choice-match | |
2423 | :match-inline 'widget-choice-match-inline | |
2424 | :action 'widget-radio-action) | |
2425 | ||
2426 | (defun widget-radio-value-create (widget) | |
2427 | ;; Insert all values | |
2428 | (let ((args (widget-get widget :args)) | |
2429 | arg) | |
bfa6c260 | 2430 | (while args |
d543e20b PA |
2431 | (setq arg (car args) |
2432 | args (cdr args)) | |
2433 | (widget-radio-add-item widget arg)))) | |
2434 | ||
2435 | (defun widget-radio-add-item (widget type) | |
2436 | "Add to radio widget WIDGET a new radio button item of type TYPE." | |
2437 | ;; (setq type (widget-convert type)) | |
2438 | (and (eq (preceding-char) ?\n) | |
2439 | (widget-get widget :indent) | |
00d00aa9 | 2440 | (insert-char ?\s (widget-get widget :indent))) |
bfa6c260 | 2441 | (widget-specify-insert |
d543e20b PA |
2442 | (let* ((value (widget-get widget :value)) |
2443 | (children (widget-get widget :children)) | |
2444 | (buttons (widget-get widget :buttons)) | |
2445 | (button-args (or (widget-get type :sibling-args) | |
2446 | (widget-get widget :button-args))) | |
2447 | (from (point)) | |
2448 | (chosen (and (null (widget-get widget :choice)) | |
2449 | (widget-apply type :match value))) | |
2450 | child button) | |
2451 | (insert (widget-get widget :entry-format)) | |
2452 | (goto-char from) | |
2453 | ;; Parse % escapes in format. | |
2454 | (while (re-search-forward "%\\([bv%]\\)" nil t) | |
7fdbdbea | 2455 | (let ((escape (char-after (match-beginning 1)))) |
d355a0b7 | 2456 | (delete-char -2) |
d543e20b | 2457 | (cond ((eq escape ?%) |
bfa6c260 | 2458 | (insert ?%)) |
d543e20b PA |
2459 | ((eq escape ?b) |
2460 | (setq button (apply 'widget-create-child-and-convert | |
bfa6c260 | 2461 | widget 'radio-button |
d543e20b PA |
2462 | :value (not (null chosen)) |
2463 | button-args))) | |
2464 | ((eq escape ?v) | |
2465 | (setq child (if chosen | |
2466 | (widget-create-child-value | |
2467 | widget type value) | |
2468 | (widget-create-child widget type))) | |
bfa6c260 | 2469 | (unless chosen |
d543e20b | 2470 | (widget-apply child :deactivate))) |
bfa6c260 | 2471 | (t |
d543e20b PA |
2472 | (error "Unknown escape `%c'" escape))))) |
2473 | ;; Update properties. | |
2474 | (when chosen | |
2475 | (widget-put widget :choice type)) | |
bfa6c260 | 2476 | (when button |
d543e20b PA |
2477 | (widget-put child :button button) |
2478 | (widget-put widget :buttons (nconc buttons (list button)))) | |
2479 | (when child | |
2480 | (widget-put widget :children (nconc children (list child)))) | |
2481 | child))) | |
2482 | ||
2483 | (defun widget-radio-value-get (widget) | |
2484 | ;; Get value of the child widget. | |
2485 | (let ((chosen (widget-radio-chosen widget))) | |
2486 | (and chosen (widget-value chosen)))) | |
2487 | ||
2488 | (defun widget-radio-chosen (widget) | |
2489 | "Return the widget representing the chosen radio button." | |
2490 | (let ((children (widget-get widget :children)) | |
2491 | current found) | |
2492 | (while children | |
2493 | (setq current (car children) | |
2494 | children (cdr children)) | |
7fdbdbea DL |
2495 | (when (widget-apply (widget-get current :button) :value-get) |
2496 | (setq found current | |
2497 | children nil))) | |
d543e20b PA |
2498 | found)) |
2499 | ||
2500 | (defun widget-radio-value-inline (widget) | |
2501 | ;; Get value of the child widget. | |
2502 | (let ((children (widget-get widget :children)) | |
2503 | current found) | |
2504 | (while children | |
2505 | (setq current (car children) | |
2506 | children (cdr children)) | |
7fdbdbea DL |
2507 | (when (widget-apply (widget-get current :button) :value-get) |
2508 | (setq found (widget-apply current :value-inline) | |
2509 | children nil))) | |
d543e20b PA |
2510 | found)) |
2511 | ||
2512 | (defun widget-radio-value-set (widget value) | |
2513 | ;; We can't just delete and recreate a radio widget, since children | |
2514 | ;; can be added after the original creation and won't be recreated | |
2515 | ;; by `:create'. | |
2516 | (let ((children (widget-get widget :children)) | |
2517 | current found) | |
2518 | (while children | |
2519 | (setq current (car children) | |
2520 | children (cdr children)) | |
2521 | (let* ((button (widget-get current :button)) | |
2522 | (match (and (not found) | |
2523 | (widget-apply current :match value)))) | |
2524 | (widget-value-set button match) | |
bfa6c260 DL |
2525 | (if match |
2526 | (progn | |
d543e20b PA |
2527 | (widget-value-set current value) |
2528 | (widget-apply current :activate)) | |
2529 | (widget-apply current :deactivate)) | |
2530 | (setq found (or found match)))))) | |
2531 | ||
2532 | (defun widget-radio-validate (widget) | |
2533 | ;; Valid if we have made a valid choice. | |
2534 | (let ((children (widget-get widget :children)) | |
2535 | current found button) | |
2536 | (while (and children (not found)) | |
2537 | (setq current (car children) | |
2538 | children (cdr children) | |
2539 | button (widget-get current :button) | |
2540 | found (widget-apply button :value-get))) | |
2541 | (if found | |
2542 | (widget-apply current :validate) | |
2543 | widget))) | |
2544 | ||
2545 | (defun widget-radio-action (widget child event) | |
2546 | ;; Check if a radio button was pressed. | |
2547 | (let ((children (widget-get widget :children)) | |
2548 | (buttons (widget-get widget :buttons)) | |
2549 | current) | |
2550 | (when (memq child buttons) | |
2551 | (while children | |
2552 | (setq current (car children) | |
2553 | children (cdr children)) | |
2554 | (let* ((button (widget-get current :button))) | |
2555 | (cond ((eq child button) | |
2556 | (widget-value-set button t) | |
2557 | (widget-apply current :activate)) | |
2558 | ((widget-value button) | |
2559 | (widget-value-set button nil) | |
2560 | (widget-apply current :deactivate))))))) | |
2561 | ;; Pass notification to parent. | |
2562 | (widget-apply widget :notify child event)) | |
2563 | ||
2564 | ;;; The `insert-button' Widget. | |
2565 | ||
2566 | (define-widget 'insert-button 'push-button | |
2ff864e0 DL |
2567 | "An insert button for the `editable-list' widget." |
2568 | :tag "INS" | |
2569 | :help-echo "Insert a new item into the list at this position." | |
d543e20b PA |
2570 | :action 'widget-insert-button-action) |
2571 | ||
06b60517 | 2572 | (defun widget-insert-button-action (widget &optional _event) |
d543e20b | 2573 | ;; Ask the parent to insert a new item. |
bfa6c260 | 2574 | (widget-apply (widget-get widget :parent) |
d543e20b PA |
2575 | :insert-before (widget-get widget :widget))) |
2576 | ||
2ff864e0 DL |
2577 | ;;; The `delete-button' Widget. |
2578 | ||
2579 | (define-widget 'delete-button 'push-button | |
2580 | "A delete button for the `editable-list' widget." | |
2581 | :tag "DEL" | |
2582 | :help-echo "Delete this item from the list." | |
2583 | :action 'widget-delete-button-action) | |
2584 | ||
06b60517 | 2585 | (defun widget-delete-button-action (widget &optional _event) |
2ff864e0 DL |
2586 | ;; Ask the parent to insert a new item. |
2587 | (widget-apply (widget-get widget :parent) | |
2588 | :delete-at (widget-get widget :widget))) | |
2589 | ||
d543e20b PA |
2590 | ;;; The `editable-list' Widget. |
2591 | ||
7fdbdbea | 2592 | ;; (defcustom widget-editable-list-gui nil |
80b709bc | 2593 | ;; "If non-nil, use GUI push-buttons in editable list when available." |
7fdbdbea DL |
2594 | ;; :type 'boolean |
2595 | ;; :group 'widgets) | |
d543e20b PA |
2596 | |
2597 | (define-widget 'editable-list 'default | |
2598 | "A variable list of widgets of the same type." | |
2599 | :convert-widget 'widget-types-convert-widget | |
4c2f559e | 2600 | :copy 'widget-types-copy |
d543e20b PA |
2601 | :offset 12 |
2602 | :format "%v%i\n" | |
2603 | :format-handler 'widget-editable-list-format-handler | |
2ff864e0 | 2604 | :entry-format "%i %d %v" |
d543e20b | 2605 | :value-create 'widget-editable-list-value-create |
d543e20b | 2606 | :value-get 'widget-editable-list-value-get |
a3c88c59 | 2607 | :validate 'widget-children-validate |
d543e20b PA |
2608 | :match 'widget-editable-list-match |
2609 | :match-inline 'widget-editable-list-match-inline | |
2610 | :insert-before 'widget-editable-list-insert-before | |
2611 | :delete-at 'widget-editable-list-delete-at) | |
2612 | ||
2613 | (defun widget-editable-list-format-handler (widget escape) | |
2614 | ;; We recognize the insert button. | |
407e43be | 2615 | ;; (let ((widget-push-button-gui widget-editable-list-gui)) |
d543e20b PA |
2616 | (cond ((eq escape ?i) |
2617 | (and (widget-get widget :indent) | |
00d00aa9 | 2618 | (insert-char ?\s (widget-get widget :indent))) |
bfa6c260 | 2619 | (apply 'widget-create-child-and-convert |
d543e20b PA |
2620 | widget 'insert-button |
2621 | (widget-get widget :append-button-args))) | |
bfa6c260 | 2622 | (t |
7fdbdbea | 2623 | (widget-default-format-handler widget escape))) |
407e43be | 2624 | ;; ) |
7fdbdbea | 2625 | ) |
d543e20b PA |
2626 | |
2627 | (defun widget-editable-list-value-create (widget) | |
2628 | ;; Insert all values | |
2629 | (let* ((value (widget-get widget :value)) | |
2630 | (type (nth 0 (widget-get widget :args))) | |
d543e20b PA |
2631 | children) |
2632 | (widget-put widget :value-pos (copy-marker (point))) | |
2633 | (set-marker-insertion-type (widget-get widget :value-pos) t) | |
2634 | (while value | |
2635 | (let ((answer (widget-match-inline type value))) | |
2636 | (if answer | |
2637 | (setq children (cons (widget-editable-list-entry-create | |
2638 | widget | |
7fdbdbea | 2639 | (if (widget-get type :inline) |
d543e20b PA |
2640 | (car answer) |
2641 | (car (car answer))) | |
2642 | t) | |
2643 | children) | |
2644 | value (cdr answer)) | |
2645 | (setq value nil)))) | |
2646 | (widget-put widget :children (nreverse children)))) | |
2647 | ||
2648 | (defun widget-editable-list-value-get (widget) | |
2649 | ;; Get value of the child widget. | |
2650 | (apply 'append (mapcar (lambda (child) (widget-apply child :value-inline)) | |
2651 | (widget-get widget :children)))) | |
2652 | ||
d543e20b PA |
2653 | (defun widget-editable-list-match (widget value) |
2654 | ;; Value must be a list and all the members must match the type. | |
2655 | (and (listp value) | |
2656 | (null (cdr (widget-editable-list-match-inline widget value))))) | |
2657 | ||
2658 | (defun widget-editable-list-match-inline (widget value) | |
2659 | (let ((type (nth 0 (widget-get widget :args))) | |
2660 | (ok t) | |
2661 | found) | |
2662 | (while (and value ok) | |
2663 | (let ((answer (widget-match-inline type value))) | |
bfa6c260 | 2664 | (if answer |
d543e20b PA |
2665 | (setq found (append found (car answer)) |
2666 | value (cdr answer)) | |
2667 | (setq ok nil)))) | |
2668 | (cons found value))) | |
2669 | ||
2670 | (defun widget-editable-list-insert-before (widget before) | |
2671 | ;; Insert a new child in the list of children. | |
2672 | (save-excursion | |
2673 | (let ((children (widget-get widget :children)) | |
2674 | (inhibit-read-only t) | |
c6753d66 | 2675 | before-change-functions |
d543e20b | 2676 | after-change-functions) |
bfa6c260 | 2677 | (cond (before |
d543e20b PA |
2678 | (goto-char (widget-get before :entry-from))) |
2679 | (t | |
2680 | (goto-char (widget-get widget :value-pos)))) | |
bfa6c260 | 2681 | (let ((child (widget-editable-list-entry-create |
d543e20b PA |
2682 | widget nil nil))) |
2683 | (when (< (widget-get child :entry-from) (widget-get widget :from)) | |
2684 | (set-marker (widget-get widget :from) | |
2685 | (widget-get child :entry-from))) | |
d543e20b PA |
2686 | (if (eq (car children) before) |
2687 | (widget-put widget :children (cons child children)) | |
2688 | (while (not (eq (car (cdr children)) before)) | |
2689 | (setq children (cdr children))) | |
2690 | (setcdr children (cons child (cdr children))))))) | |
2691 | (widget-setup) | |
0a3a0b56 | 2692 | (widget-apply widget :notify widget)) |
d543e20b PA |
2693 | |
2694 | (defun widget-editable-list-delete-at (widget child) | |
2695 | ;; Delete child from list of children. | |
2696 | (save-excursion | |
ef3f635f | 2697 | (let ((buttons (copy-sequence (widget-get widget :buttons))) |
d543e20b PA |
2698 | button |
2699 | (inhibit-read-only t) | |
c6753d66 | 2700 | before-change-functions |
d543e20b PA |
2701 | after-change-functions) |
2702 | (while buttons | |
2703 | (setq button (car buttons) | |
2704 | buttons (cdr buttons)) | |
2705 | (when (eq (widget-get button :widget) child) | |
2706 | (widget-put widget | |
2707 | :buttons (delq button (widget-get widget :buttons))) | |
2708 | (widget-delete button)))) | |
2709 | (let ((entry-from (widget-get child :entry-from)) | |
2710 | (entry-to (widget-get child :entry-to)) | |
2711 | (inhibit-read-only t) | |
c6753d66 | 2712 | before-change-functions |
d543e20b PA |
2713 | after-change-functions) |
2714 | (widget-delete child) | |
2715 | (delete-region entry-from entry-to) | |
2716 | (set-marker entry-from nil) | |
2717 | (set-marker entry-to nil)) | |
2718 | (widget-put widget :children (delq child (widget-get widget :children)))) | |
2719 | (widget-setup) | |
2720 | (widget-apply widget :notify widget)) | |
2721 | ||
2722 | (defun widget-editable-list-entry-create (widget value conv) | |
2723 | ;; Create a new entry to the list. | |
2724 | (let ((type (nth 0 (widget-get widget :args))) | |
407e43be | 2725 | ;; (widget-push-button-gui widget-editable-list-gui) |
2ff864e0 | 2726 | child delete insert) |
bfa6c260 | 2727 | (widget-specify-insert |
d543e20b PA |
2728 | (save-excursion |
2729 | (and (widget-get widget :indent) | |
00d00aa9 | 2730 | (insert-char ?\s (widget-get widget :indent))) |
d543e20b PA |
2731 | (insert (widget-get widget :entry-format))) |
2732 | ;; Parse % escapes in format. | |
2733 | (while (re-search-forward "%\\(.\\)" nil t) | |
7fdbdbea | 2734 | (let ((escape (char-after (match-beginning 1)))) |
d355a0b7 | 2735 | (delete-char -2) |
d543e20b | 2736 | (cond ((eq escape ?%) |
bfa6c260 | 2737 | (insert ?%)) |
2ff864e0 DL |
2738 | ((eq escape ?i) |
2739 | (setq insert (apply 'widget-create-child-and-convert | |
2740 | widget 'insert-button | |
2741 | (widget-get widget :insert-button-args)))) | |
2742 | ((eq escape ?d) | |
2743 | (setq delete (apply 'widget-create-child-and-convert | |
2744 | widget 'delete-button | |
2745 | (widget-get widget :delete-button-args)))) | |
d543e20b PA |
2746 | ((eq escape ?v) |
2747 | (if conv | |
bfa6c260 | 2748 | (setq child (widget-create-child-value |
d543e20b | 2749 | widget type value)) |
bfa6c260 | 2750 | (setq child (widget-create-child-value |
4c2f559e | 2751 | widget type (widget-default-get type))))) |
bfa6c260 | 2752 | (t |
d543e20b | 2753 | (error "Unknown escape `%c'" escape))))) |
407e43be SM |
2754 | (let ((buttons (widget-get widget :buttons))) |
2755 | (if insert (push insert buttons)) | |
2756 | (if delete (push delete buttons)) | |
2757 | (widget-put widget :buttons buttons)) | |
7fdbdbea DL |
2758 | (let ((entry-from (point-min-marker)) |
2759 | (entry-to (point-max-marker))) | |
d543e20b PA |
2760 | (set-marker-insertion-type entry-from t) |
2761 | (set-marker-insertion-type entry-to nil) | |
2762 | (widget-put child :entry-from entry-from) | |
2763 | (widget-put child :entry-to entry-to))) | |
407e43be SM |
2764 | (if insert (widget-put insert :widget child)) |
2765 | (if delete (widget-put delete :widget child)) | |
d543e20b PA |
2766 | child)) |
2767 | ||
2768 | ;;; The `group' Widget. | |
2769 | ||
2770 | (define-widget 'group 'default | |
a89a9d34 | 2771 | "A widget which groups other widgets inside." |
d543e20b | 2772 | :convert-widget 'widget-types-convert-widget |
4c2f559e | 2773 | :copy 'widget-types-copy |
d543e20b PA |
2774 | :format "%v" |
2775 | :value-create 'widget-group-value-create | |
d543e20b | 2776 | :value-get 'widget-editable-list-value-get |
783824f5 | 2777 | :default-get 'widget-group-default-get |
a3c88c59 | 2778 | :validate 'widget-children-validate |
d543e20b PA |
2779 | :match 'widget-group-match |
2780 | :match-inline 'widget-group-match-inline) | |
2781 | ||
2782 | (defun widget-group-value-create (widget) | |
2783 | ;; Create each component. | |
2784 | (let ((args (widget-get widget :args)) | |
2785 | (value (widget-get widget :value)) | |
2786 | arg answer children) | |
2787 | (while args | |
2788 | (setq arg (car args) | |
2789 | args (cdr args) | |
2790 | answer (widget-match-inline arg value) | |
2791 | value (cdr answer)) | |
2792 | (and (eq (preceding-char) ?\n) | |
2793 | (widget-get widget :indent) | |
00d00aa9 | 2794 | (insert-char ?\s (widget-get widget :indent))) |
3acab5ef PA |
2795 | (push (cond ((null answer) |
2796 | (widget-create-child widget arg)) | |
2797 | ((widget-get arg :inline) | |
7fdbdbea | 2798 | (widget-create-child-value widget arg (car answer))) |
3acab5ef | 2799 | (t |
7fdbdbea | 2800 | (widget-create-child-value widget arg (car (car answer))))) |
3acab5ef | 2801 | children)) |
d543e20b PA |
2802 | (widget-put widget :children (nreverse children)))) |
2803 | ||
783824f5 RS |
2804 | (defun widget-group-default-get (widget) |
2805 | ;; Get the default of the components. | |
2806 | (mapcar 'widget-default-get (widget-get widget :args))) | |
2807 | ||
06b60517 | 2808 | (defun widget-group-match (widget vals) |
d543e20b | 2809 | ;; Match if the components match. |
06b60517 JB |
2810 | (and (listp vals) |
2811 | (let ((match (widget-group-match-inline widget vals))) | |
d543e20b PA |
2812 | (and match (null (cdr match)))))) |
2813 | ||
2814 | (defun widget-group-match-inline (widget vals) | |
2815 | ;; Match if the components match. | |
2816 | (let ((args (widget-get widget :args)) | |
2817 | argument answer found) | |
2818 | (while args | |
2819 | (setq argument (car args) | |
61328d7c CY |
2820 | args (cdr args)) |
2821 | (if (setq answer (widget-match-inline argument vals)) | |
2822 | (setq found (append found (car answer)) | |
2823 | vals (cdr answer)) | |
d543e20b PA |
2824 | (setq vals nil |
2825 | args nil))) | |
2826 | (if answer | |
bfa6c260 | 2827 | (cons found vals)))) |
d543e20b | 2828 | |
3acab5ef | 2829 | ;;; The `visibility' Widget. |
d543e20b | 2830 | |
3acab5ef | 2831 | (define-widget 'visibility 'item |
647f9993 CY |
2832 | "An indicator and manipulator for hidden items. |
2833 | ||
2834 | The following properties have special meanings for this widget: | |
895123f5 | 2835 | :on-glyph Image filename or spec to display when the item is visible. |
647f9993 | 2836 | :on Text shown if the \"on\" image is nil or cannot be displayed. |
895123f5 | 2837 | :off-glyph Image filename or spec to display when the item is hidden. |
647f9993 | 2838 | :off Text shown if the \"off\" image is nil cannot be displayed." |
3acab5ef PA |
2839 | :format "%[%v%]" |
2840 | :button-prefix "" | |
2841 | :button-suffix "" | |
895123f5 | 2842 | :on-glyph "down" |
c6753d66 | 2843 | :on "Hide" |
895123f5 | 2844 | :off-glyph "right" |
c6753d66 | 2845 | :off "Show" |
3acab5ef PA |
2846 | :value-create 'widget-visibility-value-create |
2847 | :action 'widget-toggle-action | |
06b60517 | 2848 | :match (lambda (_widget _value) t)) |
d543e20b | 2849 | |
895123f5 | 2850 | (defalias 'widget-visibility-value-create 'widget-toggle-value-create) |
c6753d66 | 2851 | |
8697863a PA |
2852 | ;;; The `documentation-link' Widget. |
2853 | ;; | |
2854 | ;; This is a helper widget for `documentation-string'. | |
3acab5ef | 2855 | |
8697863a PA |
2856 | (define-widget 'documentation-link 'link |
2857 | "Link type used in documentation strings." | |
2858 | :tab-order -1 | |
bfa6c260 | 2859 | :help-echo "Describe this symbol" |
8697863a PA |
2860 | :action 'widget-documentation-link-action) |
2861 | ||
06b60517 | 2862 | (defun widget-documentation-link-action (widget &optional _event) |
f9923499 | 2863 | "Display documentation for WIDGET's value. Ignore optional argument EVENT." |
9dccd7ef RS |
2864 | (let* ((string (widget-get widget :value)) |
2865 | (symbol (intern string))) | |
2866 | (if (and (fboundp symbol) (boundp symbol)) | |
f9923499 | 2867 | ;; If there are two doc strings, give the user a way to pick one. |
9dccd7ef RS |
2868 | (apropos (concat "\\`" (regexp-quote string) "\\'")) |
2869 | (if (fboundp symbol) | |
2870 | (describe-function symbol) | |
2871 | (describe-variable symbol))))) | |
8697863a PA |
2872 | |
2873 | (defcustom widget-documentation-links t | |
2874 | "Add hyperlinks to documentation strings when non-nil." | |
2875 | :type 'boolean | |
2876 | :group 'widget-documentation) | |
2877 | ||
2878 | (defcustom widget-documentation-link-regexp "`\\([^\n`' ]+\\)'" | |
2879 | "Regexp for matching potential links in documentation strings. | |
2880 | The first group should be the link itself." | |
2881 | :type 'regexp | |
2882 | :group 'widget-documentation) | |
2883 | ||
2884 | (defcustom widget-documentation-link-p 'intern-soft | |
2885 | "Predicate used to test if a string is useful as a link. | |
a3545af4 | 2886 | The value should be a function. The function will be called with one |
8697863a PA |
2887 | argument, a string, and should return non-nil if there should be a |
2888 | link for that string." | |
2889 | :type 'function | |
2890 | :options '(widget-documentation-link-p) | |
2891 | :group 'widget-documentation) | |
2892 | ||
2893 | (defcustom widget-documentation-link-type 'documentation-link | |
2894 | "Widget type used for links in documentation strings." | |
2895 | :type 'symbol | |
2896 | :group 'widget-documentation) | |
2897 | ||
2898 | (defun widget-documentation-link-add (widget from to) | |
2899 | (widget-specify-doc widget from to) | |
2900 | (when widget-documentation-links | |
2901 | (let ((regexp widget-documentation-link-regexp) | |
a89a9d34 DL |
2902 | (buttons (widget-get widget :buttons)) |
2903 | (widget-mouse-face (default-value 'widget-mouse-face)) | |
2904 | (widget-button-face widget-documentation-face) | |
2905 | (widget-button-pressed-face widget-documentation-face)) | |
8697863a PA |
2906 | (save-excursion |
2907 | (goto-char from) | |
2908 | (while (re-search-forward regexp to t) | |
2909 | (let ((name (match-string 1)) | |
a1a4fa22 PA |
2910 | (begin (match-beginning 1)) |
2911 | (end (match-end 1))) | |
7fdbdbea DL |
2912 | (when (funcall widget-documentation-link-p name) |
2913 | (push (widget-convert-button widget-documentation-link-type | |
2914 | begin end :value name) | |
8697863a PA |
2915 | buttons))))) |
2916 | (widget-put widget :buttons buttons))) | |
2917 | (let ((indent (widget-get widget :indent))) | |
2918 | (when (and indent (not (zerop indent))) | |
bfa6c260 | 2919 | (save-excursion |
8697863a PA |
2920 | (save-restriction |
2921 | (narrow-to-region from to) | |
2922 | (goto-char (point-min)) | |
2923 | (while (search-forward "\n" nil t) | |
00d00aa9 | 2924 | (insert-char ?\s indent))))))) |
8697863a PA |
2925 | |
2926 | ;;; The `documentation-string' Widget. | |
0ce5b5d5 | 2927 | |
3acab5ef PA |
2928 | (define-widget 'documentation-string 'item |
2929 | "A documentation string." | |
2930 | :format "%v" | |
2931 | :action 'widget-documentation-string-action | |
4a1b7052 CY |
2932 | :value-create 'widget-documentation-string-value-create |
2933 | :visibility-widget 'visibility) | |
3acab5ef PA |
2934 | |
2935 | (defun widget-documentation-string-value-create (widget) | |
2936 | ;; Insert documentation string. | |
2937 | (let ((doc (widget-value widget)) | |
8697863a | 2938 | (indent (widget-get widget :indent)) |
6aaedd12 PA |
2939 | (shown (widget-get (widget-get widget :parent) :documentation-shown)) |
2940 | (start (point))) | |
3acab5ef PA |
2941 | (if (string-match "\n" doc) |
2942 | (let ((before (substring doc 0 (match-beginning 0))) | |
2943 | (after (substring doc (match-beginning 0))) | |
7fdbdbea | 2944 | button) |
3e318d97 CY |
2945 | (when (and indent (not (zerop indent))) |
2946 | (insert-char ?\s indent)) | |
00d00aa9 | 2947 | (insert before ?\s) |
8697863a | 2948 | (widget-documentation-link-add widget start (point)) |
7fdbdbea DL |
2949 | (setq button |
2950 | (widget-create-child-and-convert | |
4a1b7052 | 2951 | widget (widget-get widget :visibility-widget) |
8697863a | 2952 | :help-echo "Show or hide rest of the documentation." |
647f9993 | 2953 | :on "Hide" |
c6753d66 | 2954 | :off "More" |
0640c647 | 2955 | :always-active t |
3acab5ef | 2956 | :action 'widget-parent-action |
7fdbdbea | 2957 | shown)) |
3acab5ef | 2958 | (when shown |
0ce5b5d5 | 2959 | (setq start (point)) |
8697863a | 2960 | (when (and indent (not (zerop indent))) |
00d00aa9 | 2961 | (insert-char ?\s indent)) |
0ce5b5d5 | 2962 | (insert after) |
8697863a | 2963 | (widget-documentation-link-add widget start (point))) |
7fdbdbea | 2964 | (widget-put widget :buttons (list button))) |
3e318d97 CY |
2965 | (when (and indent (not (zerop indent))) |
2966 | (insert-char ?\s indent)) | |
6aaedd12 | 2967 | (insert doc) |
8697863a | 2968 | (widget-documentation-link-add widget start (point)))) |
bfa6c260 | 2969 | (insert ?\n)) |
3acab5ef | 2970 | |
06b60517 | 2971 | (defun widget-documentation-string-action (widget &rest _ignore) |
3acab5ef PA |
2972 | ;; Toggle documentation. |
2973 | (let ((parent (widget-get widget :parent))) | |
bfa6c260 | 2974 | (widget-put parent :documentation-shown |
3acab5ef PA |
2975 | (not (widget-get parent :documentation-shown)))) |
2976 | ;; Redraw. | |
d543e20b | 2977 | (widget-value-set widget (widget-value widget))) |
4a1b7052 CY |
2978 | |
2979 | (defun widget-add-documentation-string-button (widget &rest args) | |
2980 | "Insert a new `documentation-string' widget based on WIDGET. | |
2981 | The new widget becomes a child of WIDGET, and is also added to | |
2982 | its `:buttons' list. The documentation string is found from | |
2983 | WIDGET using the function `widget-docstring'. | |
2984 | Optional ARGS specifies additional keyword arguments for the | |
2985 | `documentation-string' widget." | |
2986 | (let ((doc (widget-docstring widget)) | |
2987 | (indent (widget-get widget :indent)) | |
2988 | (doc-indent (widget-get widget :documentation-indent))) | |
2989 | (when doc | |
2990 | (and (eq (preceding-char) ?\n) | |
2991 | indent | |
2992 | (insert-char ?\s indent)) | |
2993 | (unless (or (numberp doc-indent) (null doc-indent)) | |
2994 | (setq doc-indent 0)) | |
4a1b7052 CY |
2995 | (widget-put widget :buttons |
2996 | (cons (apply 'widget-create-child-and-convert | |
2997 | widget 'documentation-string | |
511ab56a | 2998 | :indent doc-indent |
4a1b7052 CY |
2999 | (nconc args (list doc))) |
3000 | (widget-get widget :buttons)))))) | |
fc56773e | 3001 | \f |
d543e20b PA |
3002 | ;;; The Sexp Widgets. |
3003 | ||
3004 | (define-widget 'const 'item | |
3005 | "An immutable sexp." | |
6d528fc5 | 3006 | :prompt-value 'widget-const-prompt-value |
d543e20b PA |
3007 | :format "%t\n%d") |
3008 | ||
06b60517 | 3009 | (defun widget-const-prompt-value (widget _prompt _value _unbound) |
6d528fc5 PA |
3010 | ;; Return the value of the const. |
3011 | (widget-value widget)) | |
3012 | ||
3013 | (define-widget 'function-item 'const | |
d543e20b PA |
3014 | "An immutable function name." |
3015 | :format "%v\n%h" | |
3016 | :documentation-property (lambda (symbol) | |
3017 | (condition-case nil | |
3018 | (documentation symbol t) | |
3019 | (error nil)))) | |
3020 | ||
6d528fc5 | 3021 | (define-widget 'variable-item 'const |
d543e20b PA |
3022 | "An immutable variable name." |
3023 | :format "%v\n%h" | |
3024 | :documentation-property 'variable-documentation) | |
3025 | ||
cc0a25e1 RS |
3026 | (define-widget 'other 'sexp |
3027 | "Matches any value, but doesn't let the user edit the value. | |
3028 | This is useful as last item in a `choice' widget. | |
3029 | You should use this widget type with a default value, | |
b720878d | 3030 | as in (other DEFAULT) or (other :tag \"NAME\" DEFAULT). |
cc0a25e1 RS |
3031 | If the user selects this alternative, that specifies DEFAULT |
3032 | as the value." | |
3033 | :tag "Other" | |
3034 | :format "%t%n" | |
3035 | :value 'other) | |
3036 | ||
6d528fc5 PA |
3037 | (defvar widget-string-prompt-value-history nil |
3038 | "History of input to `widget-string-prompt-value'.") | |
3039 | ||
a3c88c59 PA |
3040 | (define-widget 'string 'editable-field |
3041 | "A string" | |
3042 | :tag "String" | |
3043 | :format "%{%t%}: %v" | |
0ce5b5d5 | 3044 | :complete-function 'ispell-complete-word |
a3c88c59 | 3045 | :prompt-history 'widget-string-prompt-value-history) |
6d528fc5 | 3046 | |
d543e20b PA |
3047 | (define-widget 'regexp 'string |
3048 | "A regular expression." | |
6d528fc5 PA |
3049 | :match 'widget-regexp-match |
3050 | :validate 'widget-regexp-validate | |
4ee1cf9f | 3051 | ;; Doesn't work well with terminating newline. |
0efefc52 | 3052 | ;; :value-face 'widget-single-line-field |
d543e20b PA |
3053 | :tag "Regexp") |
3054 | ||
06b60517 | 3055 | (defun widget-regexp-match (_widget value) |
6d528fc5 PA |
3056 | ;; Match valid regexps. |
3057 | (and (stringp value) | |
a3c88c59 | 3058 | (condition-case nil |
6d528fc5 PA |
3059 | (prog1 t |
3060 | (string-match value "")) | |
3061 | (error nil)))) | |
3062 | ||
3063 | (defun widget-regexp-validate (widget) | |
3064 | "Check that the value of WIDGET is a valid regexp." | |
7fdbdbea DL |
3065 | (condition-case data |
3066 | (prog1 nil | |
3067 | (string-match (widget-value widget) "")) | |
3068 | (error (widget-put widget :error (error-message-string data)) | |
3069 | widget))) | |
6d528fc5 | 3070 | |
d543e20b | 3071 | (define-widget 'file 'string |
bfa6c260 | 3072 | "A file widget. |
f29cf2b1 | 3073 | It reads a file name from an editable text field." |
bcd70d97 | 3074 | :completions #'completion-file-name-table |
6d528fc5 | 3075 | :prompt-value 'widget-file-prompt-value |
a3c88c59 | 3076 | :format "%{%t%}: %v" |
4ee1cf9f | 3077 | ;; Doesn't work well with terminating newline. |
0efefc52 | 3078 | ;; :value-face 'widget-single-line-field |
f1231b8e RS |
3079 | :tag "File") |
3080 | ||
6d528fc5 PA |
3081 | (defun widget-file-prompt-value (widget prompt value unbound) |
3082 | ;; Read file from minibuffer. | |
3083 | (abbreviate-file-name | |
3084 | (if unbound | |
3085 | (read-file-name prompt) | |
5b76833f | 3086 | (let ((prompt2 (format "%s (default %s): " prompt value)) |
6d528fc5 PA |
3087 | (dir (file-name-directory value)) |
3088 | (file (file-name-nondirectory value)) | |
3089 | (must-match (widget-get widget :must-match))) | |
3090 | (read-file-name prompt2 dir nil must-match file))))) | |
3091 | ||
f1231b8e RS |
3092 | ;;;(defun widget-file-action (widget &optional event) |
3093 | ;;; ;; Read a file name from the minibuffer. | |
3094 | ;;; (let* ((value (widget-value widget)) | |
3095 | ;;; (dir (file-name-directory value)) | |
3096 | ;;; (file (file-name-nondirectory value)) | |
3097 | ;;; (menu-tag (widget-apply widget :menu-tag-get)) | |
3098 | ;;; (must-match (widget-get widget :must-match)) | |
5b76833f | 3099 | ;;; (answer (read-file-name (concat menu-tag " (default " value "): ") |
f1231b8e RS |
3100 | ;;; dir nil must-match file))) |
3101 | ;;; (widget-value-set widget (abbreviate-file-name answer)) | |
3102 | ;;; (widget-setup) | |
3103 | ;;; (widget-apply widget :notify widget event))) | |
d543e20b | 3104 | |
bd1f16ce | 3105 | ;; Fixme: use file-name-as-directory. |
d543e20b | 3106 | (define-widget 'directory 'file |
bfa6c260 | 3107 | "A directory widget. |
f29cf2b1 | 3108 | It reads a directory name from an editable text field." |
d543e20b PA |
3109 | :tag "Directory") |
3110 | ||
a3c88c59 PA |
3111 | (defvar widget-symbol-prompt-value-history nil |
3112 | "History of input to `widget-symbol-prompt-value'.") | |
3113 | ||
3114 | (define-widget 'symbol 'editable-field | |
4084d128 | 3115 | "A Lisp symbol." |
d543e20b PA |
3116 | :value nil |
3117 | :tag "Symbol" | |
a3c88c59 | 3118 | :format "%{%t%}: %v" |
06b60517 | 3119 | :match (lambda (_widget value) (symbolp value)) |
bcd70d97 | 3120 | :completions obarray |
a3c88c59 PA |
3121 | :prompt-internal 'widget-symbol-prompt-internal |
3122 | :prompt-match 'symbolp | |
3123 | :prompt-history 'widget-symbol-prompt-value-history | |
06b60517 | 3124 | :value-to-internal (lambda (_widget value) |
d543e20b PA |
3125 | (if (symbolp value) |
3126 | (symbol-name value) | |
3127 | value)) | |
06b60517 | 3128 | :value-to-external (lambda (_widget value) |
d543e20b PA |
3129 | (if (stringp value) |
3130 | (intern value) | |
3131 | value))) | |
3132 | ||
a3c88c59 PA |
3133 | (defun widget-symbol-prompt-internal (widget prompt initial history) |
3134 | ;; Read file from minibuffer. | |
bfa6c260 | 3135 | (let ((answer (completing-read prompt obarray |
a3c88c59 PA |
3136 | (widget-get widget :prompt-match) |
3137 | nil initial history))) | |
3138 | (if (and (stringp answer) | |
3139 | (not (zerop (length answer)))) | |
3140 | answer | |
3141 | (error "No value")))) | |
3142 | ||
3143 | (defvar widget-function-prompt-value-history nil | |
3144 | "History of input to `widget-function-prompt-value'.") | |
3145 | ||
99477684 | 3146 | (define-widget 'function 'restricted-sexp |
4084d128 | 3147 | "A Lisp function." |
bcd70d97 SM |
3148 | :completions (apply-partially #'completion-table-with-predicate |
3149 | obarray #'fboundp 'strict) | |
a3c88c59 PA |
3150 | :prompt-value 'widget-field-prompt-value |
3151 | :prompt-internal 'widget-symbol-prompt-internal | |
3152 | :prompt-match 'fboundp | |
3153 | :prompt-history 'widget-function-prompt-value-history | |
3154 | :action 'widget-field-action | |
bd1f16ce | 3155 | :match-alternatives '(functionp) |
7fdbdbea DL |
3156 | :validate (lambda (widget) |
3157 | (unless (functionp (widget-value widget)) | |
3158 | (widget-put widget :error (format "Invalid function: %S" | |
3159 | (widget-value widget))) | |
3160 | widget)) | |
3161 | :value 'ignore | |
d543e20b PA |
3162 | :tag "Function") |
3163 | ||
a3c88c59 PA |
3164 | (defvar widget-variable-prompt-value-history nil |
3165 | "History of input to `widget-variable-prompt-value'.") | |
3166 | ||
d543e20b | 3167 | (define-widget 'variable 'symbol |
be96282a | 3168 | "A Lisp variable." |
a3c88c59 PA |
3169 | :prompt-match 'boundp |
3170 | :prompt-history 'widget-variable-prompt-value-history | |
bcd70d97 SM |
3171 | :completions (apply-partially #'completion-table-with-predicate |
3172 | obarray #'boundp 'strict) | |
d543e20b PA |
3173 | :tag "Variable") |
3174 | ||
fc56773e RS |
3175 | (define-widget 'coding-system 'symbol |
3176 | "A MULE coding-system." | |
3177 | :format "%{%t%}: %v" | |
3178 | :tag "Coding system" | |
7fdbdbea | 3179 | :base-only nil |
b0628208 | 3180 | :prompt-history 'coding-system-value-history |
fc56773e | 3181 | :prompt-value 'widget-coding-system-prompt-value |
7fdbdbea | 3182 | :action 'widget-coding-system-action |
bcd70d97 SM |
3183 | :completions (apply-partially #'completion-table-with-predicate |
3184 | obarray #'coding-system-p 'strict) | |
7fdbdbea DL |
3185 | :validate (lambda (widget) |
3186 | (unless (coding-system-p (widget-value widget)) | |
3187 | (widget-put widget :error (format "Invalid coding system: %S" | |
3188 | (widget-value widget))) | |
3189 | widget)) | |
3190 | :value 'undecided | |
3191 | :prompt-match 'coding-system-p) | |
3192 | ||
06b60517 | 3193 | (defun widget-coding-system-prompt-value (widget prompt value _unbound) |
7fdbdbea DL |
3194 | "Read coding-system from minibuffer." |
3195 | (if (widget-get widget :base-only) | |
3196 | (intern | |
5b76833f | 3197 | (completing-read (format "%s (default %s): " prompt value) |
7fdbdbea DL |
3198 | (mapcar #'list (coding-system-list t)) nil nil nil |
3199 | coding-system-history)) | |
5b76833f | 3200 | (read-coding-system (format "%s (default %s): " prompt value) value))) |
fc56773e RS |
3201 | |
3202 | (defun widget-coding-system-action (widget &optional event) | |
fc56773e RS |
3203 | (let ((answer |
3204 | (widget-coding-system-prompt-value | |
3205 | widget | |
3206 | (widget-apply widget :menu-tag-get) | |
3207 | (widget-value widget) | |
3208 | t))) | |
3209 | (widget-value-set widget answer) | |
3210 | (widget-apply widget :notify widget event) | |
3211 | (widget-setup))) | |
fc56773e | 3212 | \f |
0f5642c2 | 3213 | ;;; I'm not sure about what this is good for? KFS. |
987cee97 RS |
3214 | (defvar widget-key-sequence-prompt-value-history nil |
3215 | "History of input to `widget-key-sequence-prompt-value'.") | |
3216 | ||
0f5642c2 KS |
3217 | (defvar widget-key-sequence-default-value [ignore] |
3218 | "Default value for an empty key sequence.") | |
3219 | ||
3220 | (defvar widget-key-sequence-map | |
3221 | (let ((map (make-sparse-keymap))) | |
3222 | (set-keymap-parent map widget-field-keymap) | |
3223 | (define-key map [(control ?q)] 'widget-key-sequence-read-event) | |
3224 | map)) | |
987cee97 RS |
3225 | |
3226 | (define-widget 'key-sequence 'restricted-sexp | |
0f5642c2 | 3227 | "A key sequence." |
987cee97 RS |
3228 | :prompt-value 'widget-field-prompt-value |
3229 | :prompt-internal 'widget-symbol-prompt-internal | |
0f5642c2 | 3230 | ; :prompt-match 'fboundp ;; What was this good for? KFS |
987cee97 RS |
3231 | :prompt-history 'widget-key-sequence-prompt-value-history |
3232 | :action 'widget-field-action | |
3233 | :match-alternatives '(stringp vectorp) | |
0f5642c2 KS |
3234 | :format "%{%t%}: %v" |
3235 | :validate 'widget-key-sequence-validate | |
3236 | :value-to-internal 'widget-key-sequence-value-to-internal | |
3237 | :value-to-external 'widget-key-sequence-value-to-external | |
3238 | :value widget-key-sequence-default-value | |
3239 | :keymap widget-key-sequence-map | |
3240 | :help-echo "C-q: insert KEY, EVENT, or CODE; RET: enter value" | |
987cee97 | 3241 | :tag "Key sequence") |
0f5642c2 KS |
3242 | |
3243 | (defun widget-key-sequence-read-event (ev) | |
3244 | (interactive (list | |
3245 | (let ((inhibit-quit t) quit-flag) | |
3246 | (read-event "Insert KEY, EVENT, or CODE: ")))) | |
3247 | (let ((ev2 (and (memq 'down (event-modifiers ev)) | |
3248 | (read-event))) | |
3249 | (tr (and (keymapp function-key-map) | |
3250 | (lookup-key function-key-map (vector ev))))) | |
3251 | (when (and (integerp ev) | |
3252 | (or (and (<= ?0 ev) (< ev (+ ?0 (min 10 read-quoted-char-radix)))) | |
3253 | (and (<= ?a (downcase ev)) | |
3254 | (< (downcase ev) (+ ?a -10 (min 36 read-quoted-char-radix)))))) | |
3255 | (setq unread-command-events (cons ev unread-command-events) | |
3256 | ev (read-quoted-char (format "Enter code (radix %d)" read-quoted-char-radix)) | |
3257 | tr nil) | |
e0576f07 | 3258 | (if (and (integerp ev) (not (characterp ev))) |
0f5642c2 KS |
3259 | (insert (char-to-string ev)))) ;; throw invalid char error |
3260 | (setq ev (key-description (list ev))) | |
3261 | (when (arrayp tr) | |
3262 | (setq tr (key-description (list (aref tr 0)))) | |
3263 | (if (y-or-n-p (format "Key %s is translated to %s -- use %s? " ev tr tr)) | |
3264 | (setq ev tr ev2 nil))) | |
3265 | (insert (if (= (char-before) ?\s) "" " ") ev " ") | |
3266 | (if ev2 | |
3267 | (insert (key-description (list ev2)) " ")))) | |
3268 | ||
3269 | (defun widget-key-sequence-validate (widget) | |
3270 | (unless (or (stringp (widget-value widget)) | |
3271 | (vectorp (widget-value widget))) | |
3272 | (widget-put widget :error (format "Invalid key sequence: %S" | |
3273 | (widget-value widget))) | |
3274 | widget)) | |
3275 | ||
3276 | (defun widget-key-sequence-value-to-internal (widget value) | |
3277 | (if (widget-apply widget :match value) | |
3278 | (if (equal value widget-key-sequence-default-value) | |
3279 | "" | |
3280 | (key-description value)) | |
3281 | value)) | |
3282 | ||
06b60517 | 3283 | (defun widget-key-sequence-value-to-external (_widget value) |
0f5642c2 KS |
3284 | (if (stringp value) |
3285 | (if (string-match "\\`[[:space:]]*\\'" value) | |
3286 | widget-key-sequence-default-value | |
3287 | (read-kbd-macro value)) | |
3288 | value)) | |
3289 | ||
987cee97 | 3290 | \f |
a3c88c59 | 3291 | (define-widget 'sexp 'editable-field |
be96282a | 3292 | "An arbitrary Lisp expression." |
d543e20b | 3293 | :tag "Lisp expression" |
a3c88c59 | 3294 | :format "%{%t%}: %v" |
d543e20b PA |
3295 | :value nil |
3296 | :validate 'widget-sexp-validate | |
06b60517 | 3297 | :match (lambda (_widget _value) t) |
d543e20b | 3298 | :value-to-internal 'widget-sexp-value-to-internal |
06b60517 | 3299 | :value-to-external (lambda (_widget value) (read value)) |
a3c88c59 | 3300 | :prompt-history 'widget-sexp-prompt-value-history |
6d528fc5 | 3301 | :prompt-value 'widget-sexp-prompt-value) |
d543e20b | 3302 | |
06b60517 | 3303 | (defun widget-sexp-value-to-internal (_widget value) |
d543e20b | 3304 | ;; Use pp for printer representation. |
6d1ab9d4 RS |
3305 | (let ((pp (if (symbolp value) |
3306 | (prin1-to-string value) | |
3307 | (pp-to-string value)))) | |
d543e20b PA |
3308 | (while (string-match "\n\\'" pp) |
3309 | (setq pp (substring pp 0 -1))) | |
3310 | (if (or (string-match "\n\\'" pp) | |
3311 | (> (length pp) 40)) | |
3312 | (concat "\n" pp) | |
3313 | pp))) | |
3314 | ||
3315 | (defun widget-sexp-validate (widget) | |
3316 | ;; Valid if we can read the string and there is no junk left after it. | |
99f01612 DL |
3317 | (with-temp-buffer |
3318 | (insert (widget-apply widget :value-get)) | |
3319 | (goto-char (point-min)) | |
1d869634 | 3320 | (let (err) |
bcd70d97 | 3321 | (condition-case data ;Note: We get a spurious byte-compile warning here. |
1d869634 DL |
3322 | (progn |
3323 | ;; Avoid a confusing end-of-file error. | |
3324 | (skip-syntax-forward "\\s-") | |
3325 | (if (eobp) | |
3326 | (setq err "Empty sexp -- use `nil'?") | |
7fdbdbea | 3327 | (unless (widget-apply widget :match (read (current-buffer))) |
1d869634 | 3328 | (setq err (widget-get widget :type-error)))) |
3bc603c4 LH |
3329 | ;; Allow whitespace after expression. |
3330 | (skip-syntax-forward "\\s-") | |
1d869634 DL |
3331 | (if (and (not (eobp)) |
3332 | (not err)) | |
3333 | (setq err (format "Junk at end of expression: %s" | |
3334 | (buffer-substring (point) | |
3335 | (point-max)))))) | |
3336 | (end-of-file ; Avoid confusing error message. | |
3337 | (setq err "Unbalanced sexp")) | |
3338 | (error (setq err (error-message-string data)))) | |
3339 | (if (not err) | |
3340 | nil | |
3341 | (widget-put widget :error err) | |
3342 | widget)))) | |
d543e20b | 3343 | |
6d528fc5 PA |
3344 | (defvar widget-sexp-prompt-value-history nil |
3345 | "History of input to `widget-sexp-prompt-value'.") | |
3346 | ||
3347 | (defun widget-sexp-prompt-value (widget prompt value unbound) | |
3348 | ;; Read an arbitrary sexp. | |
3349 | (let ((found (read-string prompt | |
a3c88c59 PA |
3350 | (if unbound nil (cons (prin1-to-string value) 0)) |
3351 | (widget-get widget :prompt-history)))) | |
bfa6c260 DL |
3352 | (let ((answer (read-from-string found))) |
3353 | (unless (= (cdr answer) (length found)) | |
3354 | (error "Junk at end of expression: %s" | |
3355 | (substring found (cdr answer)))) | |
3356 | (car answer)))) | |
a3c88c59 | 3357 | |
0b296dac RS |
3358 | (define-widget 'restricted-sexp 'sexp |
3359 | "A Lisp expression restricted to values that match. | |
3360 | To use this type, you must define :match or :match-alternatives." | |
3361 | :type-error "The specified value is not valid" | |
3362 | :match 'widget-restricted-sexp-match | |
3363 | :value-to-internal (lambda (widget value) | |
3364 | (if (widget-apply widget :match value) | |
3365 | (prin1-to-string value) | |
3366 | value))) | |
3367 | ||
3368 | (defun widget-restricted-sexp-match (widget value) | |
3369 | (let ((alternatives (widget-get widget :match-alternatives)) | |
3370 | matched) | |
3371 | (while (and alternatives (not matched)) | |
3372 | (if (cond ((functionp (car alternatives)) | |
3373 | (funcall (car alternatives) value)) | |
3374 | ((and (consp (car alternatives)) | |
3375 | (eq (car (car alternatives)) 'quote)) | |
3376 | (eq value (nth 1 (car alternatives))))) | |
3377 | (setq matched t)) | |
3378 | (setq alternatives (cdr alternatives))) | |
3379 | matched)) | |
fc56773e | 3380 | \f |
0b296dac | 3381 | (define-widget 'integer 'restricted-sexp |
d543e20b PA |
3382 | "An integer." |
3383 | :tag "Integer" | |
3384 | :value 0 | |
3385 | :type-error "This field should contain an integer" | |
0b296dac RS |
3386 | :match-alternatives '(integerp)) |
3387 | ||
3388 | (define-widget 'number 'restricted-sexp | |
d9bfd9dc | 3389 | "A number (floating point or integer)." |
0b296dac RS |
3390 | :tag "Number" |
3391 | :value 0.0 | |
d9bfd9dc | 3392 | :type-error "This field should contain a number (floating point or integer)" |
0b296dac | 3393 | :match-alternatives '(numberp)) |
d543e20b | 3394 | |
d9bfd9dc MR |
3395 | (define-widget 'float 'restricted-sexp |
3396 | "A floating point number." | |
3397 | :tag "Floating point number" | |
3398 | :value 0.0 | |
3399 | :type-error "This field should contain a floating point number" | |
3400 | :match-alternatives '(floatp)) | |
3401 | ||
a3c88c59 | 3402 | (define-widget 'character 'editable-field |
0b296dac | 3403 | "A character." |
d543e20b PA |
3404 | :tag "Character" |
3405 | :value 0 | |
bfa6c260 | 3406 | :size 1 |
d543e20b | 3407 | :format "%{%t%}: %v\n" |
1d3c7fd6 | 3408 | :valid-regexp "\\`.\\'" |
6d528fc5 | 3409 | :error "This field should contain a single character" |
06b60517 | 3410 | :value-to-internal (lambda (_widget value) |
bfa6c260 | 3411 | (if (stringp value) |
a3c88c59 PA |
3412 | value |
3413 | (char-to-string value))) | |
06b60517 | 3414 | :value-to-external (lambda (_widget value) |
d543e20b PA |
3415 | (if (stringp value) |
3416 | (aref value 0) | |
3417 | value)) | |
06b60517 | 3418 | :match (lambda (_widget value) |
e2056874 | 3419 | (characterp value))) |
d543e20b | 3420 | |
d543e20b | 3421 | (define-widget 'list 'group |
be96282a | 3422 | "A Lisp list." |
d543e20b PA |
3423 | :tag "List" |
3424 | :format "%{%t%}:\n%v") | |
3425 | ||
3426 | (define-widget 'vector 'group | |
be96282a | 3427 | "A Lisp vector." |
d543e20b PA |
3428 | :tag "Vector" |
3429 | :format "%{%t%}:\n%v" | |
3430 | :match 'widget-vector-match | |
06b60517 JB |
3431 | :value-to-internal (lambda (_widget value) (append value nil)) |
3432 | :value-to-external (lambda (_widget value) (apply 'vector value))) | |
d543e20b | 3433 | |
bfa6c260 | 3434 | (defun widget-vector-match (widget value) |
d543e20b PA |
3435 | (and (vectorp value) |
3436 | (widget-group-match widget | |
bd042c03 | 3437 | (widget-apply widget :value-to-internal value)))) |
d543e20b PA |
3438 | |
3439 | (define-widget 'cons 'group | |
3440 | "A cons-cell." | |
3441 | :tag "Cons-cell" | |
3442 | :format "%{%t%}:\n%v" | |
3443 | :match 'widget-cons-match | |
06b60517 | 3444 | :value-to-internal (lambda (_widget value) |
d543e20b | 3445 | (list (car value) (cdr value))) |
06b60517 | 3446 | :value-to-external (lambda (_widget value) |
407e43be | 3447 | (apply 'cons value))) |
d543e20b | 3448 | |
bfa6c260 | 3449 | (defun widget-cons-match (widget value) |
d543e20b PA |
3450 | (and (consp value) |
3451 | (widget-group-match widget | |
3452 | (widget-apply widget :value-to-internal value)))) | |
fc56773e | 3453 | \f |
6b61353c KH |
3454 | ;;; The `lazy' Widget. |
3455 | ;; | |
3456 | ;; Recursive datatypes. | |
3457 | ||
3458 | (define-widget 'lazy 'default | |
3459 | "Base widget for recursive datastructures. | |
3460 | ||
3461 | The `lazy' widget will, when instantiated, contain a single inferior | |
3462 | widget, of the widget type specified by the :type parameter. The | |
3463 | value of the `lazy' widget is the same as the value of the inferior | |
3464 | widget. When deriving a new widget from the 'lazy' widget, the :type | |
3465 | parameter is allowed to refer to the widget currently being defined, | |
3466 | thus allowing recursive datastructures to be described. | |
3467 | ||
3468 | The :type parameter takes the same arguments as the defcustom | |
3469 | parameter with the same name. | |
3470 | ||
3471 | Most composite widgets, i.e. widgets containing other widgets, does | |
3472 | not allow recursion. That is, when you define a new widget type, none | |
3473 | of the inferior widgets may be of the same type you are currently | |
3474 | defining. | |
3475 | ||
3476 | In Lisp, however, it is custom to define datastructures in terms of | |
3477 | themselves. A list, for example, is defined as either nil, or a cons | |
3478 | cell whose cdr itself is a list. The obvious way to translate this | |
3479 | into a widget type would be | |
3480 | ||
3481 | (define-widget 'my-list 'choice | |
3482 | \"A list of sexps.\" | |
3483 | :tag \"Sexp list\" | |
3484 | :args '((const nil) (cons :value (nil) sexp my-list))) | |
3485 | ||
3486 | Here we attempt to define my-list as a choice of either the constant | |
3487 | nil, or a cons-cell containing a sexp and my-lisp. This will not work | |
3488 | because the `choice' widget does not allow recursion. | |
3489 | ||
0e726aa5 KS |
3490 | Using the `lazy' widget you can overcome this problem, as in this |
3491 | example: | |
6b61353c KH |
3492 | |
3493 | (define-widget 'sexp-list 'lazy | |
3494 | \"A list of sexps.\" | |
3495 | :tag \"Sexp list\" | |
3496 | :type '(choice (const nil) (cons :value (nil) sexp sexp-list)))" | |
3497 | :format "%{%t%}: %v" | |
3498 | ;; We don't convert :type because we want to allow recursive | |
3499 | ;; datastructures. This is slow, so we should not create speed | |
0e726aa5 | 3500 | ;; critical widgets by deriving from this. |
6b61353c KH |
3501 | :convert-widget 'widget-value-convert-widget |
3502 | :value-create 'widget-type-value-create | |
3503 | :value-get 'widget-child-value-get | |
3504 | :value-inline 'widget-child-value-inline | |
3505 | :default-get 'widget-type-default-get | |
3506 | :match 'widget-type-match | |
3507 | :validate 'widget-child-validate) | |
3508 | ||
3509 | \f | |
fc56773e RS |
3510 | ;;; The `plist' Widget. |
3511 | ;; | |
3512 | ;; Property lists. | |
3513 | ||
3514 | (define-widget 'plist 'list | |
3515 | "A property list." | |
3516 | :key-type '(symbol :tag "Key") | |
3517 | :value-type '(sexp :tag "Value") | |
3518 | :convert-widget 'widget-plist-convert-widget | |
3519 | :tag "Plist") | |
3520 | ||
3521 | (defvar widget-plist-value-type) ;Dynamic variable | |
3522 | ||
3523 | (defun widget-plist-convert-widget (widget) | |
3524 | ;; Handle `:options'. | |
3525 | (let* ((options (widget-get widget :options)) | |
4681ca3a | 3526 | (widget-plist-value-type (widget-get widget :value-type)) |
bfa6c260 | 3527 | (other `(editable-list :inline t |
fc56773e | 3528 | (group :inline t |
7fdbdbea | 3529 | ,(widget-get widget :key-type) |
4681ca3a | 3530 | ,widget-plist-value-type))) |
fc56773e RS |
3531 | (args (if options |
3532 | (list `(checklist :inline t | |
3533 | :greedy t | |
3534 | ,@(mapcar 'widget-plist-convert-option | |
3535 | options)) | |
3536 | other) | |
3537 | (list other)))) | |
3538 | (widget-put widget :args args) | |
3539 | widget)) | |
d543e20b | 3540 | |
fc56773e RS |
3541 | (defun widget-plist-convert-option (option) |
3542 | ;; Convert a single plist option. | |
3543 | (let (key-type value-type) | |
3544 | (if (listp option) | |
3545 | (let ((key (nth 0 option))) | |
3546 | (setq value-type (nth 1 option)) | |
3547 | (if (listp key) | |
31d5543d | 3548 | (setq key-type key) |
fc56773e RS |
3549 | (setq key-type `(const ,key)))) |
3550 | (setq key-type `(const ,option) | |
3551 | value-type widget-plist-value-type)) | |
3552 | `(group :format "Key: %v" :inline t ,key-type ,value-type))) | |
3553 | ||
3554 | ||
3555 | ;;; The `alist' Widget. | |
3556 | ;; | |
3557 | ;; Association lists. | |
3558 | ||
3559 | (define-widget 'alist 'list | |
3560 | "An association list." | |
a7013a02 | 3561 | :key-type '(sexp :tag "Key") |
fc56773e RS |
3562 | :value-type '(sexp :tag "Value") |
3563 | :convert-widget 'widget-alist-convert-widget | |
3564 | :tag "Alist") | |
3565 | ||
3566 | (defvar widget-alist-value-type) ;Dynamic variable | |
3567 | ||
3568 | (defun widget-alist-convert-widget (widget) | |
3569 | ;; Handle `:options'. | |
3570 | (let* ((options (widget-get widget :options)) | |
4681ca3a | 3571 | (widget-alist-value-type (widget-get widget :value-type)) |
bfa6c260 | 3572 | (other `(editable-list :inline t |
fc56773e | 3573 | (cons :format "%v" |
7fdbdbea | 3574 | ,(widget-get widget :key-type) |
4681ca3a | 3575 | ,widget-alist-value-type))) |
fc56773e RS |
3576 | (args (if options |
3577 | (list `(checklist :inline t | |
3578 | :greedy t | |
3579 | ,@(mapcar 'widget-alist-convert-option | |
3580 | options)) | |
3581 | other) | |
3582 | (list other)))) | |
3583 | (widget-put widget :args args) | |
3584 | widget)) | |
3585 | ||
3586 | (defun widget-alist-convert-option (option) | |
3587 | ;; Convert a single alist option. | |
3588 | (let (key-type value-type) | |
3589 | (if (listp option) | |
3590 | (let ((key (nth 0 option))) | |
3591 | (setq value-type (nth 1 option)) | |
3592 | (if (listp key) | |
31d5543d | 3593 | (setq key-type key) |
fc56773e RS |
3594 | (setq key-type `(const ,key)))) |
3595 | (setq key-type `(const ,option) | |
3596 | value-type widget-alist-value-type)) | |
3597 | `(cons :format "Key: %v" ,key-type ,value-type))) | |
3598 | \f | |
d543e20b PA |
3599 | (define-widget 'choice 'menu-choice |
3600 | "A union of several sexp types." | |
3601 | :tag "Choice" | |
c6753d66 | 3602 | :format "%{%t%}: %[Value Menu%] %v" |
8697863a PA |
3603 | :button-prefix 'widget-push-button-prefix |
3604 | :button-suffix 'widget-push-button-suffix | |
a3c88c59 PA |
3605 | :prompt-value 'widget-choice-prompt-value) |
3606 | ||
06b60517 | 3607 | (defun widget-choice-prompt-value (widget prompt value _unbound) |
bfa6c260 | 3608 | "Make a choice." |
a3c88c59 PA |
3609 | (let ((args (widget-get widget :args)) |
3610 | (completion-ignore-case (widget-get widget :case-fold)) | |
3611 | current choices old) | |
7fdbdbea | 3612 | ;; Find the first arg that matches VALUE. |
a3c88c59 PA |
3613 | (let ((look args)) |
3614 | (while look | |
3615 | (if (widget-apply (car look) :match value) | |
3616 | (setq old (car look) | |
3617 | look nil) | |
3618 | (setq look (cdr look))))) | |
3619 | ;; Find new choice. | |
3620 | (setq current | |
3621 | (cond ((= (length args) 0) | |
3622 | nil) | |
3623 | ((= (length args) 1) | |
3624 | (nth 0 args)) | |
3625 | ((and (= (length args) 2) | |
3626 | (memq old args)) | |
3627 | (if (eq old (nth 0 args)) | |
3628 | (nth 1 args) | |
3629 | (nth 0 args))) | |
3630 | (t | |
3631 | (while args | |
3632 | (setq current (car args) | |
3633 | args (cdr args)) | |
3634 | (setq choices | |
3635 | (cons (cons (widget-apply current :menu-tag-get) | |
3636 | current) | |
3637 | choices))) | |
3638 | (let ((val (completing-read prompt choices nil t))) | |
3639 | (if (stringp val) | |
3640 | (let ((try (try-completion val choices))) | |
3641 | (when (stringp try) | |
3642 | (setq val try)) | |
3643 | (cdr (assoc val choices))) | |
3644 | nil))))) | |
3645 | (if current | |
3646 | (widget-prompt-value current prompt nil t) | |
3647 | value))) | |
fc56773e | 3648 | \f |
d543e20b PA |
3649 | (define-widget 'radio 'radio-button-choice |
3650 | "A union of several sexp types." | |
3651 | :tag "Choice" | |
a3c88c59 PA |
3652 | :format "%{%t%}:\n%v" |
3653 | :prompt-value 'widget-choice-prompt-value) | |
d543e20b PA |
3654 | |
3655 | (define-widget 'repeat 'editable-list | |
3656 | "A variable length homogeneous list." | |
3657 | :tag "Repeat" | |
3658 | :format "%{%t%}:\n%v%i\n") | |
3659 | ||
3660 | (define-widget 'set 'checklist | |
3661 | "A list of members from a fixed set." | |
3662 | :tag "Set" | |
3663 | :format "%{%t%}:\n%v") | |
3664 | ||
3665 | (define-widget 'boolean 'toggle | |
3666 | "To be nil or non-nil, that is the question." | |
3667 | :tag "Boolean" | |
6d528fc5 | 3668 | :prompt-value 'widget-boolean-prompt-value |
8697863a PA |
3669 | :button-prefix 'widget-push-button-prefix |
3670 | :button-suffix 'widget-push-button-suffix | |
c6753d66 RS |
3671 | :format "%{%t%}: %[Toggle%] %v\n" |
3672 | :on "on (non-nil)" | |
3673 | :off "off (nil)") | |
d543e20b | 3674 | |
06b60517 | 3675 | (defun widget-boolean-prompt-value (_widget prompt _value _unbound) |
6d528fc5 | 3676 | ;; Toggle a boolean. |
a3c88c59 | 3677 | (y-or-n-p prompt)) |
fc56773e | 3678 | \f |
d543e20b PA |
3679 | ;;; The `color' Widget. |
3680 | ||
77339a6e | 3681 | ;; Fixme: match |
bfa6c260 | 3682 | (define-widget 'color 'editable-field |
0f648ca2 | 3683 | "Choose a color name (with sample)." |
ce4374c7 | 3684 | :format "%{%t%}: %v (%{sample%})\n" |
6f320937 | 3685 | :value-create 'widget-color-value-create |
0f648ca2 PA |
3686 | :size 10 |
3687 | :tag "Color" | |
3688 | :value "black" | |
bcd70d97 | 3689 | :completions (or facemenu-color-alist (defined-colors)) |
0f648ca2 PA |
3690 | :sample-face-get 'widget-color-sample-face-get |
3691 | :notify 'widget-color-notify | |
3692 | :action 'widget-color-action) | |
3693 | ||
6f320937 CY |
3694 | (defun widget-color-value-create (widget) |
3695 | (widget-field-value-create widget) | |
3696 | (widget-insert " ") | |
3697 | (widget-create-child-and-convert | |
3698 | widget 'push-button | |
587faadd | 3699 | :tag " Choose " :action 'widget-color--choose-action) |
6f320937 CY |
3700 | (widget-insert " ")) |
3701 | ||
06b60517 | 3702 | (defun widget-color--choose-action (widget &optional _event) |
6f320937 CY |
3703 | (list-colors-display |
3704 | nil nil | |
3705 | `(lambda (color) | |
3706 | (when (buffer-live-p ,(current-buffer)) | |
3707 | (widget-value-set ',(widget-get widget :parent) color) | |
3708 | (let* ((buf (get-buffer "*Colors*")) | |
3709 | (win (get-buffer-window buf 0))) | |
3710 | (bury-buffer buf) | |
3711 | (and win (> (length (window-list)) 1) | |
3712 | (delete-window win))) | |
3713 | (pop-to-buffer ,(current-buffer)))))) | |
3714 | ||
0f648ca2 | 3715 | (defun widget-color-sample-face-get (widget) |
4ee1cf9f PA |
3716 | (let* ((value (condition-case nil |
3717 | (widget-value widget) | |
76834555 GM |
3718 | (error (widget-get widget :value))))) |
3719 | (if (color-defined-p value) | |
546cf5b0 | 3720 | (list (cons 'foreground-color value)) |
76834555 | 3721 | 'default))) |
d543e20b | 3722 | |
d543e20b | 3723 | (defun widget-color-action (widget &optional event) |
bd1f16ce | 3724 | "Prompt for a color." |
d543e20b PA |
3725 | (let* ((tag (widget-apply widget :menu-tag-get)) |
3726 | (prompt (concat tag ": ")) | |
99f01612 | 3727 | (answer (facemenu-read-color prompt))) |
d543e20b PA |
3728 | (unless (zerop (length answer)) |
3729 | (widget-value-set widget answer) | |
0a3a0b56 PA |
3730 | (widget-setup) |
3731 | (widget-apply widget :notify widget event)))) | |
d543e20b | 3732 | |
0f648ca2 | 3733 | (defun widget-color-notify (widget child &optional event) |
00d00aa9 | 3734 | "Update the sample, and notify the parent." |
bfa6c260 | 3735 | (overlay-put (widget-get widget :sample-overlay) |
0f648ca2 PA |
3736 | 'face (widget-apply widget :sample-face-get)) |
3737 | (widget-default-notify widget child event)) | |
fc56773e | 3738 | \f |
d543e20b PA |
3739 | ;;; The Help Echo |
3740 | ||
d543e20b | 3741 | (defun widget-echo-help (pos) |
233d5cde | 3742 | "Display help-echo text for widget at POS." |
d543e20b PA |
3743 | (let* ((widget (widget-at pos)) |
3744 | (help-echo (and widget (widget-get widget :help-echo)))) | |
233d5cde DL |
3745 | (if (functionp help-echo) |
3746 | (setq help-echo (funcall help-echo widget))) | |
6b61353c | 3747 | (if help-echo (message "%s" (eval help-echo))))) |
d543e20b PA |
3748 | |
3749 | ;;; The End: | |
3750 | ||
3751 | (provide 'wid-edit) | |
3752 | ||
aeba6f9a | 3753 | ;;; wid-edit.el ends here |