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d543e20b PA |
1 | ;;; wid-edit.el --- Functions for creating and using widgets. |
2 | ;; | |
3 | ;; Copyright (C) 1996, 1997 Free Software Foundation, Inc. | |
4 | ;; | |
5 | ;; Author: Per Abrahamsen <abraham@dina.kvl.dk> | |
6 | ;; Keywords: extensions | |
c953515e | 7 | ;; Version: 1.9942 |
d543e20b PA |
8 | ;; X-URL: http://www.dina.kvl.dk/~abraham/custom/ |
9 | ||
ef3f635f RS |
10 | ;; This file is part of GNU Emacs. |
11 | ||
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation; either version 2, or (at your option) | |
15 | ;; any later version. | |
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 | |
23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
24 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
25 | ;; Boston, MA 02111-1307, USA. | |
26 | ||
d543e20b PA |
27 | ;;; Commentary: |
28 | ;; | |
29 | ;; See `widget.el'. | |
30 | ||
31 | ;;; Code: | |
32 | ||
33 | (require 'widget) | |
3acab5ef | 34 | (eval-when-compile (require 'cl)) |
d543e20b PA |
35 | |
36 | ;;; Compatibility. | |
37 | ||
38 | (eval-and-compile | |
39 | (autoload 'pp-to-string "pp") | |
40 | (autoload 'Info-goto-node "info") | |
41 | ||
42 | (when (string-match "XEmacs" emacs-version) | |
43 | (condition-case nil | |
44 | (require 'overlay) | |
45 | (error (load-library "x-overlay")))) | |
46 | ||
a3c88c59 PA |
47 | (if (string-match "XEmacs" emacs-version) |
48 | (defun widget-event-point (event) | |
49 | "Character position of the end of event if that exists, or nil." | |
50 | (if (mouse-event-p event) | |
51 | (event-point event) | |
52 | nil)) | |
53 | (defun widget-event-point (event) | |
54 | "Character position of the end of event if that exists, or nil." | |
55 | (posn-point (event-end event)))) | |
56 | ||
c953515e | 57 | (defalias 'widget-read-event (if (string-match "XEmacs" emacs-version) |
0ce5b5d5 PA |
58 | 'next-event |
59 | 'read-event)) | |
60 | ||
61 | ;; The following should go away when bundled with Emacs. | |
d543e20b PA |
62 | (condition-case () |
63 | (require 'custom) | |
64 | (error nil)) | |
65 | ||
66 | (unless (and (featurep 'custom) (fboundp 'custom-declare-variable)) | |
67 | ;; We have the old custom-library, hack around it! | |
68 | (defmacro defgroup (&rest args) nil) | |
69 | (defmacro defcustom (var value doc &rest args) | |
6d528fc5 | 70 | (` (defvar (, var) (, value) (, doc)))) |
d543e20b PA |
71 | (defmacro defface (&rest args) nil) |
72 | (define-widget-keywords :prefix :tag :load :link :options :type :group) | |
73 | (when (fboundp 'copy-face) | |
74 | (copy-face 'default 'widget-documentation-face) | |
75 | (copy-face 'bold 'widget-button-face) | |
76 | (copy-face 'italic 'widget-field-face))) | |
77 | ||
a3c88c59 PA |
78 | (unless (fboundp 'button-release-event-p) |
79 | ;; XEmacs function missing from Emacs. | |
80 | (defun button-release-event-p (event) | |
81 | "Non-nil if EVENT is a mouse-button-release event object." | |
82 | (and (eventp event) | |
83 | (memq (event-basic-type event) '(mouse-1 mouse-2 mouse-3)) | |
84 | (or (memq 'click (event-modifiers event)) | |
85 | (memq 'drag (event-modifiers event)))))) | |
d543e20b | 86 | |
c953515e PA |
87 | (unless (fboundp 'functionp) |
88 | ;; Missing from Emacs 19.34 and earlier. | |
89 | (defun functionp (object) | |
90 | "Non-nil of OBJECT is a type of object that can be called as a function." | |
91 | (or (subrp object) (byte-code-function-p object) | |
92 | (eq (car-safe object) 'lambda) | |
93 | (and (symbolp object) (fboundp object))))) | |
94 | ||
d543e20b PA |
95 | (unless (fboundp 'error-message-string) |
96 | ;; Emacs function missing in XEmacs. | |
97 | (defun error-message-string (obj) | |
98 | "Convert an error value to an error message." | |
99 | (let ((buf (get-buffer-create " *error-message*"))) | |
100 | (erase-buffer buf) | |
101 | (display-error obj buf) | |
102 | (buffer-string buf))))) | |
103 | ||
d5c42d02 PA |
104 | (when (let ((a "foo")) |
105 | (put-text-property 1 2 'foo 1 a) | |
106 | (put-text-property 1 2 'bar 2 a) | |
107 | (set-text-properties 1 2 nil a) | |
108 | (text-properties-at 1 a)) | |
109 | ;; XEmacs 20.2 and earlier had a buggy set-text-properties. | |
110 | (defun set-text-properties (start end props &optional buffer-or-string) | |
111 | "Completely replace properties of text from START to END. | |
112 | The third argument PROPS is the new property list. | |
113 | The optional fourth argument, BUFFER-OR-STRING, | |
114 | is the string or buffer containing the text." | |
115 | (map-extents #'(lambda (extent ignored) | |
116 | (remove-text-properties | |
117 | start end | |
118 | (list (extent-property extent 'text-prop) | |
119 | nil) | |
120 | buffer-or-string) | |
121 | nil) | |
122 | buffer-or-string start end nil nil 'text-prop) | |
123 | (add-text-properties start end props buffer-or-string))) | |
124 | ||
d543e20b PA |
125 | ;;; Customization. |
126 | ||
127 | (defgroup widgets nil | |
128 | "Customization support for the Widget Library." | |
129 | :link '(custom-manual "(widget)Top") | |
130 | :link '(url-link :tag "Development Page" | |
131 | "http://www.dina.kvl.dk/~abraham/custom/") | |
132 | :prefix "widget-" | |
133 | :group 'extensions | |
d543e20b PA |
134 | :group 'hypermedia) |
135 | ||
8697863a PA |
136 | (defgroup widget-documentation nil |
137 | "Options controling the display of documentation strings." | |
138 | :group 'widgets) | |
139 | ||
6aaedd12 PA |
140 | (defgroup widget-faces nil |
141 | "Faces used by the widget library." | |
142 | :group 'widgets | |
143 | :group 'faces) | |
144 | ||
0b296dac RS |
145 | (defvar widget-documentation-face 'widget-documentation-face |
146 | "Face used for documentation strings in widges. | |
147 | This exists as a variable so it can be set locally in certain buffers.") | |
148 | ||
8697863a PA |
149 | (defface widget-documentation-face '((((class color) |
150 | (background dark)) | |
151 | (:foreground "lime green")) | |
152 | (((class color) | |
153 | (background light)) | |
154 | (:foreground "dark green")) | |
155 | (t nil)) | |
156 | "Face used for documentation text." | |
157 | :group 'widget-documentation | |
158 | :group 'widget-faces) | |
159 | ||
d543e20b PA |
160 | (defface widget-button-face '((t (:bold t))) |
161 | "Face used for widget buttons." | |
6aaedd12 | 162 | :group 'widget-faces) |
d543e20b PA |
163 | |
164 | (defcustom widget-mouse-face 'highlight | |
165 | "Face used for widget buttons when the mouse is above them." | |
166 | :type 'face | |
6aaedd12 | 167 | :group 'widget-faces) |
d543e20b PA |
168 | |
169 | (defface widget-field-face '((((class grayscale color) | |
170 | (background light)) | |
6d528fc5 | 171 | (:background "gray85")) |
d543e20b PA |
172 | (((class grayscale color) |
173 | (background dark)) | |
25ac13b5 | 174 | (:background "dim gray")) |
d543e20b PA |
175 | (t |
176 | (:italic t))) | |
177 | "Face used for editable fields." | |
6aaedd12 | 178 | :group 'widget-faces) |
d543e20b | 179 | |
c953515e PA |
180 | (defface widget-single-line-field-face '((((class grayscale color) |
181 | (background light)) | |
182 | (:background "gray85")) | |
183 | (((class grayscale color) | |
184 | (background dark)) | |
185 | (:background "dim gray")) | |
186 | (t | |
187 | (:italic t))) | |
188 | "Face used for editable fields spanning only a single line." | |
189 | :group 'widget-faces) | |
190 | ||
191 | (defvar widget-single-line-display-table | |
192 | (let ((table (make-display-table))) | |
193 | (aset table 9 "^I") | |
194 | (aset table 10 "^J") | |
195 | table) | |
196 | "Display table used for single-line editable fields.") | |
197 | ||
198 | (when (fboundp 'set-face-display-table) | |
199 | (set-face-display-table 'widget-single-line-field-face | |
200 | widget-single-line-display-table)) | |
201 | ||
d543e20b PA |
202 | ;;; Utility functions. |
203 | ;; | |
204 | ;; These are not really widget specific. | |
205 | ||
206 | (defsubst widget-plist-member (plist prop) | |
207 | ;; Return non-nil if PLIST has the property PROP. | |
208 | ;; PLIST is a property list, which is a list of the form | |
209 | ;; (PROP1 VALUE1 PROP2 VALUE2 ...). PROP is a symbol. | |
210 | ;; Unlike `plist-get', this allows you to distinguish between a missing | |
211 | ;; property and a property with the value nil. | |
212 | ;; The value is actually the tail of PLIST whose car is PROP. | |
213 | (while (and plist (not (eq (car plist) prop))) | |
214 | (setq plist (cdr (cdr plist)))) | |
215 | plist) | |
216 | ||
217 | (defun widget-princ-to-string (object) | |
218 | ;; Return string representation of OBJECT, any Lisp object. | |
219 | ;; No quoting characters are used; no delimiters are printed around | |
220 | ;; the contents of strings. | |
221 | (save-excursion | |
222 | (set-buffer (get-buffer-create " *widget-tmp*")) | |
223 | (erase-buffer) | |
224 | (let ((standard-output (current-buffer))) | |
225 | (princ object)) | |
226 | (buffer-string))) | |
227 | ||
228 | (defun widget-clear-undo () | |
229 | "Clear all undo information." | |
230 | (buffer-disable-undo (current-buffer)) | |
231 | (buffer-enable-undo)) | |
232 | ||
a3c88c59 PA |
233 | (defcustom widget-menu-max-size 40 |
234 | "Largest number of items allowed in a popup-menu. | |
235 | Larger menus are read through the minibuffer." | |
236 | :group 'widgets | |
237 | :type 'integer) | |
238 | ||
c953515e | 239 | (defcustom widget-menu-minibuffer-flag (string-match "XEmacs" emacs-version) |
0b296dac RS |
240 | "*Control how to ask for a choice from the keyboard. |
241 | Non-nil means use the minibuffer; | |
242 | nil means read a single character." | |
243 | :group 'widgets | |
244 | :type 'boolean) | |
245 | ||
d543e20b PA |
246 | (defun widget-choose (title items &optional event) |
247 | "Choose an item from a list. | |
248 | ||
249 | First argument TITLE is the name of the list. | |
6d528fc5 PA |
250 | Second argument ITEMS is an list whose members are either |
251 | (NAME . VALUE), to indicate selectable items, or just strings to | |
252 | indicate unselectable items. | |
d543e20b PA |
253 | Optional third argument EVENT is an input event. |
254 | ||
255 | The user is asked to choose between each NAME from the items alist, | |
256 | and the VALUE of the chosen element will be returned. If EVENT is a | |
257 | mouse event, and the number of elements in items is less than | |
258 | `widget-menu-max-size', a popup menu will be used, otherwise the | |
259 | minibuffer." | |
260 | (cond ((and (< (length items) widget-menu-max-size) | |
261 | event (fboundp 'x-popup-menu) window-system) | |
262 | ;; We are in Emacs-19, pressed by the mouse | |
263 | (x-popup-menu event | |
264 | (list title (cons "" items)))) | |
265 | ((and (< (length items) widget-menu-max-size) | |
266 | event (fboundp 'popup-menu) window-system) | |
267 | ;; We are in XEmacs, pressed by the mouse | |
268 | (let ((val (get-popup-menu-response | |
269 | (cons title | |
270 | (mapcar | |
271 | (function | |
272 | (lambda (x) | |
6d528fc5 PA |
273 | (if (stringp x) |
274 | (vector x nil nil) | |
275 | (vector (car x) (list (car x)) t)))) | |
d543e20b PA |
276 | items))))) |
277 | (setq val (and val | |
278 | (listp (event-object val)) | |
279 | (stringp (car-safe (event-object val))) | |
280 | (car (event-object val)))) | |
281 | (cdr (assoc val items)))) | |
0b296dac RS |
282 | (widget-menu-minibuffer-flag |
283 | ;; Read the choice of name from the minibuffer. | |
e5dfabb4 | 284 | (setq items (widget-remove-if 'stringp items)) |
d543e20b PA |
285 | (let ((val (completing-read (concat title ": ") items nil t))) |
286 | (if (stringp val) | |
287 | (let ((try (try-completion val items))) | |
288 | (when (stringp try) | |
289 | (setq val try)) | |
290 | (cdr (assoc val items))) | |
0b296dac RS |
291 | nil))) |
292 | (t | |
293 | ;; Construct a menu of the choices | |
294 | ;; and then use it for prompting for a single character. | |
295 | (let* ((overriding-terminal-local-map | |
296 | (make-sparse-keymap)) | |
297 | map choice (next-digit ?0) | |
298 | value) | |
299 | ;; Define SPC as a prefix char to get to this menu. | |
300 | (define-key overriding-terminal-local-map " " | |
301 | (setq map (make-sparse-keymap title))) | |
d4b8422f RS |
302 | (save-excursion |
303 | (set-buffer (get-buffer-create " widget-choose")) | |
304 | (erase-buffer) | |
305 | (insert "Available choices:\n\n") | |
306 | (while items | |
307 | (setq choice (car items) items (cdr items)) | |
308 | (if (consp choice) | |
309 | (let* ((name (car choice)) | |
310 | (function (cdr choice))) | |
311 | (insert (format "%c = %s\n" next-digit name)) | |
312 | (define-key map (vector next-digit) function))) | |
313 | ;; Allocate digits to disabled alternatives | |
314 | ;; so that the digit of a given alternative never varies. | |
315 | (setq next-digit (1+ next-digit))) | |
316 | (insert "\nC-g = Quit")) | |
317 | (define-key map [?\C-g] 'keyboard-quit) | |
0b296dac RS |
318 | (define-key map [t] 'keyboard-quit) |
319 | (setcdr map (nreverse (cdr map))) | |
320 | ;; Unread a SPC to lead to our new menu. | |
321 | (setq unread-command-events (cons ?\ unread-command-events)) | |
322 | ;; Read a char with the menu, and return the result | |
323 | ;; that corresponds to it. | |
d4b8422f RS |
324 | (save-window-excursion |
325 | (display-buffer (get-buffer " widget-choose")) | |
326 | (let ((cursor-in-echo-area t)) | |
327 | (setq value | |
328 | (lookup-key overriding-terminal-local-map | |
329 | (read-key-sequence title) t)))) | |
0b296dac RS |
330 | (when (eq value 'keyboard-quit) |
331 | (error "Canceled")) | |
332 | value)))) | |
d543e20b | 333 | |
e5dfabb4 RS |
334 | (defun widget-remove-if (predictate list) |
335 | (let (result (tail list)) | |
336 | (while tail | |
337 | (or (funcall predictate (car tail)) | |
338 | (setq result (cons (car tail) result))) | |
339 | (setq tail (cdr tail))) | |
340 | (nreverse result))) | |
341 | ||
d543e20b PA |
342 | ;;; Widget text specifications. |
343 | ;; | |
344 | ;; These functions are for specifying text properties. | |
345 | ||
346 | (defun widget-specify-none (from to) | |
347 | ;; Clear all text properties between FROM and TO. | |
348 | (set-text-properties from to nil)) | |
349 | ||
350 | (defun widget-specify-text (from to) | |
351 | ;; Default properties. | |
352 | (add-text-properties from to (list 'read-only t | |
353 | 'front-sticky t | |
d5c42d02 | 354 | 'rear-nonsticky nil |
0a3a0b56 PA |
355 | 'start-open nil |
356 | 'end-open nil))) | |
d543e20b | 357 | |
8697863a PA |
358 | (defcustom widget-field-add-space |
359 | (or (< emacs-major-version 20) | |
360 | (and (eq emacs-major-version 20) | |
361 | (< emacs-minor-version 3)) | |
362 | (not (string-match "XEmacs" emacs-version))) | |
363 | "Non-nil means add extra space at the end of editable text fields. | |
364 | ||
365 | This is needed on all versions of Emacs, and on XEmacs before 20.3. | |
366 | If you don't add the space, it will become impossible to edit a zero | |
367 | size field." | |
368 | :type 'boolean | |
369 | :group 'widgets) | |
370 | ||
da5ec617 PA |
371 | (defcustom widget-field-use-before-change |
372 | (or (> emacs-minor-version 34) | |
373 | (> emacs-major-version 20) | |
374 | (string-match "XEmacs" emacs-version)) | |
375 | "Non-nil means use `before-change-functions' to track editable fields. | |
376 | This enables the use of undo, but doesn'f work on Emacs 19.34 and earlier. | |
377 | Using before hooks also means that the :notify function can't know the | |
378 | new value." | |
379 | :type 'boolean | |
380 | :group 'widgets) | |
381 | ||
d543e20b | 382 | (defun widget-specify-field (widget from to) |
0a3a0b56 PA |
383 | "Specify editable button for WIDGET between FROM and TO." |
384 | (put-text-property from to 'read-only nil) | |
0ce5b5d5 PA |
385 | ;; Terminating space is not part of the field, but necessary in |
386 | ;; order for local-map to work. Remove next sexp if local-map works | |
387 | ;; at the end of the overlay. | |
388 | (save-excursion | |
389 | (goto-char to) | |
8697863a PA |
390 | (when widget-field-add-space |
391 | (insert-and-inherit " ")) | |
0ce5b5d5 | 392 | (setq to (point))) |
a1a4fa22 PA |
393 | (if widget-field-add-space |
394 | (add-text-properties (1- to) to | |
395 | '(front-sticky nil start-open t read-only to)) | |
396 | (add-text-properties to (1+ to) | |
397 | '(front-sticky nil start-open t read-only to))) | |
0a3a0b56 PA |
398 | (add-text-properties (1- from) from |
399 | '(rear-nonsticky t end-open t read-only from)) | |
d543e20b | 400 | (let ((map (widget-get widget :keymap)) |
0a3a0b56 PA |
401 | (face (or (widget-get widget :value-face) 'widget-field-face)) |
402 | (help-echo (widget-get widget :help-echo)) | |
403 | (overlay (make-overlay from to nil nil t))) | |
d543e20b | 404 | (unless (or (stringp help-echo) (null help-echo)) |
0a3a0b56 PA |
405 | (setq help-echo 'widget-mouse-help)) |
406 | (widget-put widget :field-overlay overlay) | |
407 | (overlay-put overlay 'detachable nil) | |
408 | (overlay-put overlay 'field widget) | |
409 | (overlay-put overlay 'local-map map) | |
410 | (overlay-put overlay 'keymap map) | |
411 | (overlay-put overlay 'face face) | |
412 | (overlay-put overlay 'balloon-help help-echo) | |
413 | (overlay-put overlay 'help-echo help-echo))) | |
d543e20b | 414 | |
d543e20b | 415 | (defun widget-specify-button (widget from to) |
0a3a0b56 | 416 | "Specify button for WIDGET between FROM and TO." |
d543e20b | 417 | (let ((face (widget-apply widget :button-face-get)) |
0a3a0b56 PA |
418 | (help-echo (widget-get widget :help-echo)) |
419 | (overlay (make-overlay from to nil t nil))) | |
420 | (widget-put widget :button-overlay overlay) | |
d543e20b PA |
421 | (unless (or (null help-echo) (stringp help-echo)) |
422 | (setq help-echo 'widget-mouse-help)) | |
0a3a0b56 PA |
423 | (overlay-put overlay 'button widget) |
424 | (overlay-put overlay 'mouse-face widget-mouse-face) | |
425 | (overlay-put overlay 'balloon-help help-echo) | |
426 | (overlay-put overlay 'help-echo help-echo) | |
427 | (overlay-put overlay 'face face))) | |
d543e20b PA |
428 | |
429 | (defun widget-mouse-help (extent) | |
430 | "Find mouse help string for button in extent." | |
431 | (let* ((widget (widget-at (extent-start-position extent))) | |
432 | (help-echo (and widget (widget-get widget :help-echo)))) | |
433 | (cond ((stringp help-echo) | |
434 | help-echo) | |
435 | ((and (symbolp help-echo) (fboundp help-echo) | |
436 | (stringp (setq help-echo (funcall help-echo widget)))) | |
437 | help-echo) | |
438 | (t | |
439 | (format "(widget %S :help-echo %S)" widget help-echo))))) | |
440 | ||
441 | (defun widget-specify-sample (widget from to) | |
442 | ;; Specify sample for WIDGET between FROM and TO. | |
443 | (let ((face (widget-apply widget :sample-face-get))) | |
444 | (when face | |
445 | (add-text-properties from to (list 'start-open t | |
446 | 'end-open t | |
447 | 'face face))))) | |
d543e20b PA |
448 | (defun widget-specify-doc (widget from to) |
449 | ;; Specify documentation for WIDGET between FROM and TO. | |
450 | (add-text-properties from to (list 'widget-doc widget | |
0b296dac | 451 | 'face widget-documentation-face))) |
d543e20b PA |
452 | |
453 | (defmacro widget-specify-insert (&rest form) | |
454 | ;; Execute FORM without inheriting any text properties. | |
6d528fc5 PA |
455 | (` |
456 | (save-restriction | |
d543e20b PA |
457 | (let ((inhibit-read-only t) |
458 | result | |
c6753d66 | 459 | before-change-functions |
d543e20b PA |
460 | after-change-functions) |
461 | (insert "<>") | |
462 | (narrow-to-region (- (point) 2) (point)) | |
463 | (widget-specify-none (point-min) (point-max)) | |
464 | (goto-char (1+ (point-min))) | |
6d528fc5 | 465 | (setq result (progn (,@ form))) |
d543e20b PA |
466 | (delete-region (point-min) (1+ (point-min))) |
467 | (delete-region (1- (point-max)) (point-max)) | |
468 | (goto-char (point-max)) | |
6d528fc5 | 469 | result)))) |
d543e20b PA |
470 | |
471 | (defface widget-inactive-face '((((class grayscale color) | |
472 | (background dark)) | |
473 | (:foreground "light gray")) | |
474 | (((class grayscale color) | |
475 | (background light)) | |
83427907 | 476 | (:foreground "dim gray")) |
d543e20b PA |
477 | (t |
478 | (:italic t))) | |
479 | "Face used for inactive widgets." | |
6aaedd12 | 480 | :group 'widget-faces) |
d543e20b PA |
481 | |
482 | (defun widget-specify-inactive (widget from to) | |
483 | "Make WIDGET inactive for user modifications." | |
484 | (unless (widget-get widget :inactive) | |
485 | (let ((overlay (make-overlay from to nil t nil))) | |
486 | (overlay-put overlay 'face 'widget-inactive-face) | |
6aaedd12 PA |
487 | ;; This is disabled, as it makes the mouse cursor change shape. |
488 | ;; (overlay-put overlay 'mouse-face 'widget-inactive-face) | |
6d528fc5 PA |
489 | (overlay-put overlay 'evaporate t) |
490 | (overlay-put overlay 'priority 100) | |
d543e20b PA |
491 | (overlay-put overlay (if (string-match "XEmacs" emacs-version) |
492 | 'read-only | |
493 | 'modification-hooks) '(widget-overlay-inactive)) | |
494 | (widget-put widget :inactive overlay)))) | |
495 | ||
496 | (defun widget-overlay-inactive (&rest junk) | |
497 | "Ignoring the arguments, signal an error." | |
498 | (unless inhibit-read-only | |
499 | (error "Attempt to modify inactive widget"))) | |
500 | ||
501 | ||
502 | (defun widget-specify-active (widget) | |
503 | "Make WIDGET active for user modifications." | |
504 | (let ((inactive (widget-get widget :inactive))) | |
505 | (when inactive | |
506 | (delete-overlay inactive) | |
507 | (widget-put widget :inactive nil)))) | |
508 | ||
509 | ;;; Widget Properties. | |
510 | ||
511 | (defsubst widget-type (widget) | |
512 | "Return the type of WIDGET, a symbol." | |
513 | (car widget)) | |
514 | ||
515 | (defun widget-put (widget property value) | |
516 | "In WIDGET set PROPERTY to VALUE. | |
517 | The value can later be retrived with `widget-get'." | |
518 | (setcdr widget (plist-put (cdr widget) property value))) | |
519 | ||
520 | (defun widget-get (widget property) | |
521 | "In WIDGET, get the value of PROPERTY. | |
522 | The value could either be specified when the widget was created, or | |
523 | later with `widget-put'." | |
524 | (let ((missing t) | |
525 | value tmp) | |
526 | (while missing | |
527 | (cond ((setq tmp (widget-plist-member (cdr widget) property)) | |
528 | (setq value (car (cdr tmp)) | |
529 | missing nil)) | |
530 | ((setq tmp (car widget)) | |
531 | (setq widget (get tmp 'widget-type))) | |
532 | (t | |
533 | (setq missing nil)))) | |
534 | value)) | |
535 | ||
944c91b6 PA |
536 | (defun widget-get-indirect (widget property) |
537 | "In WIDGET, get the value of PROPERTY. | |
538 | If the value is a symbol, return its binding. | |
539 | Otherwise, just return the value." | |
540 | (let ((value (widget-get widget property))) | |
541 | (if (symbolp value) | |
542 | (symbol-value value) | |
543 | value))) | |
544 | ||
d543e20b PA |
545 | (defun widget-member (widget property) |
546 | "Non-nil iff there is a definition in WIDGET for PROPERTY." | |
547 | (cond ((widget-plist-member (cdr widget) property) | |
548 | t) | |
549 | ((car widget) | |
550 | (widget-member (get (car widget) 'widget-type) property)) | |
551 | (t nil))) | |
552 | ||
553 | ;;;###autoload | |
554 | (defun widget-apply (widget property &rest args) | |
555 | "Apply the value of WIDGET's PROPERTY to the widget itself. | |
556 | ARGS are passed as extra arguments to the function." | |
557 | (apply (widget-get widget property) widget args)) | |
558 | ||
559 | (defun widget-value (widget) | |
560 | "Extract the current value of WIDGET." | |
561 | (widget-apply widget | |
562 | :value-to-external (widget-apply widget :value-get))) | |
563 | ||
564 | (defun widget-value-set (widget value) | |
565 | "Set the current value of WIDGET to VALUE." | |
566 | (widget-apply widget | |
567 | :value-set (widget-apply widget | |
568 | :value-to-internal value))) | |
569 | ||
570 | (defun widget-match-inline (widget vals) | |
571 | ;; In WIDGET, match the start of VALS. | |
572 | (cond ((widget-get widget :inline) | |
573 | (widget-apply widget :match-inline vals)) | |
574 | ((and vals | |
575 | (widget-apply widget :match (car vals))) | |
576 | (cons (list (car vals)) (cdr vals))) | |
577 | (t nil))) | |
578 | ||
579 | (defun widget-apply-action (widget &optional event) | |
580 | "Apply :action in WIDGET in response to EVENT." | |
8697863a PA |
581 | (if (widget-apply widget :active) |
582 | (widget-apply widget :action event) | |
583 | (error "Attempt to perform action on inactive widget"))) | |
6d528fc5 | 584 | |
a3c88c59 PA |
585 | ;;; Helper functions. |
586 | ;; | |
587 | ;; These are widget specific. | |
588 | ||
589 | ;;;###autoload | |
590 | (defun widget-prompt-value (widget prompt &optional value unbound) | |
591 | "Prompt for a value matching WIDGET, using PROMPT. | |
592 | The current value is assumed to be VALUE, unless UNBOUND is non-nil." | |
593 | (unless (listp widget) | |
594 | (setq widget (list widget))) | |
595 | (setq prompt (format "[%s] %s" (widget-type widget) prompt)) | |
596 | (setq widget (widget-convert widget)) | |
597 | (let ((answer (widget-apply widget :prompt-value prompt value unbound))) | |
598 | (unless (widget-apply widget :match answer) | |
599 | (error "Value does not match %S type." (car widget))) | |
600 | answer)) | |
601 | ||
602 | (defun widget-get-sibling (widget) | |
603 | "Get the item WIDGET is assumed to toggle. | |
604 | This is only meaningful for radio buttons or checkboxes in a list." | |
605 | (let* ((parent (widget-get widget :parent)) | |
606 | (children (widget-get parent :children)) | |
607 | child) | |
608 | (catch 'child | |
609 | (while children | |
610 | (setq child (car children) | |
611 | children (cdr children)) | |
612 | (when (eq (widget-get child :button) widget) | |
613 | (throw 'child child))) | |
614 | nil))) | |
615 | ||
6aaedd12 PA |
616 | (defun widget-map-buttons (function &optional buffer maparg) |
617 | "Map FUNCTION over the buttons in BUFFER. | |
618 | FUNCTION is called with the arguments WIDGET and MAPARG. | |
619 | ||
620 | If FUNCTION returns non-nil, the walk is cancelled. | |
621 | ||
622 | The arguments MAPARG, and BUFFER default to nil and (current-buffer), | |
623 | respectively." | |
624 | (let ((cur (point-min)) | |
625 | (widget nil) | |
626 | (parent nil) | |
627 | (overlays (if buffer | |
628 | (save-excursion (set-buffer buffer) (overlay-lists)) | |
629 | (overlay-lists)))) | |
630 | (setq overlays (append (car overlays) (cdr overlays))) | |
631 | (while (setq cur (pop overlays)) | |
632 | (setq widget (overlay-get cur 'button)) | |
633 | (if (and widget (funcall function widget maparg)) | |
634 | (setq overlays nil))))) | |
635 | ||
d543e20b PA |
636 | ;;; Glyphs. |
637 | ||
638 | (defcustom widget-glyph-directory (concat data-directory "custom/") | |
639 | "Where widget glyphs are located. | |
640 | If this variable is nil, widget will try to locate the directory | |
25ac13b5 | 641 | automatically." |
d543e20b PA |
642 | :group 'widgets |
643 | :type 'directory) | |
644 | ||
645 | (defcustom widget-glyph-enable t | |
646 | "If non nil, use glyphs in images when available." | |
647 | :group 'widgets | |
648 | :type 'boolean) | |
649 | ||
25ac13b5 PA |
650 | (defcustom widget-image-conversion |
651 | '((xpm ".xpm") (gif ".gif") (png ".png") (jpeg ".jpg" ".jpeg") | |
652 | (xbm ".xbm")) | |
653 | "Conversion alist from image formats to file name suffixes." | |
654 | :group 'widgets | |
655 | :type '(repeat (cons :format "%v" | |
656 | (symbol :tag "Image Format" unknown) | |
657 | (repeat :tag "Suffixes" | |
658 | (string :format "%v"))))) | |
659 | ||
3acab5ef PA |
660 | (defun widget-glyph-find (image tag) |
661 | "Create a glyph corresponding to IMAGE with string TAG as fallback. | |
662 | IMAGE should either already be a glyph, or be a file name sans | |
663 | extension (xpm, xbm, gif, jpg, or png) located in | |
664 | `widget-glyph-directory'." | |
665 | (cond ((not (and image | |
666 | (string-match "XEmacs" emacs-version) | |
d543e20b PA |
667 | widget-glyph-enable |
668 | (fboundp 'make-glyph) | |
25ac13b5 | 669 | (fboundp 'locate-file) |
d543e20b PA |
670 | image)) |
671 | ;; We don't want or can't use glyphs. | |
3acab5ef | 672 | nil) |
d543e20b PA |
673 | ((and (fboundp 'glyphp) |
674 | (glyphp image)) | |
3acab5ef PA |
675 | ;; Already a glyph. Use it. |
676 | image) | |
25ac13b5 PA |
677 | ((stringp image) |
678 | ;; A string. Look it up in relevant directories. | |
679 | (let* ((dirlist (list (or widget-glyph-directory | |
680 | (concat data-directory | |
681 | "custom/")) | |
682 | data-directory)) | |
683 | (formats widget-image-conversion) | |
684 | file) | |
685 | (while (and formats (not file)) | |
0ce5b5d5 PA |
686 | (when (valid-image-instantiator-format-p (car (car formats))) |
687 | (setq file (locate-file image dirlist | |
688 | (mapconcat 'identity | |
689 | (cdr (car formats)) | |
690 | ":")))) | |
691 | (unless file | |
25ac13b5 | 692 | (setq formats (cdr formats)))) |
0ce5b5d5 PA |
693 | (and file |
694 | ;; We create a glyph with the file as the default image | |
695 | ;; instantiator, and the TAG fallback | |
696 | (make-glyph (list (vector (car (car formats)) ':file file) | |
697 | (vector 'string ':data tag)))))) | |
25ac13b5 PA |
698 | ((valid-instantiator-p image 'image) |
699 | ;; A valid image instantiator (e.g. [gif :file "somefile"] etc.) | |
3acab5ef PA |
700 | (make-glyph (list image |
701 | (vector 'string ':data tag)))) | |
0ce5b5d5 PA |
702 | ((consp image) |
703 | ;; This could be virtually anything. Let `make-glyph' sort it out. | |
704 | (make-glyph image)) | |
d543e20b | 705 | (t |
25ac13b5 | 706 | ;; Oh well. |
3acab5ef PA |
707 | nil))) |
708 | ||
709 | (defun widget-glyph-insert (widget tag image &optional down inactive) | |
710 | "In WIDGET, insert the text TAG or, if supported, IMAGE. | |
711 | IMAGE should either be a glyph, an image instantiator, or an image file | |
712 | name sans extension (xpm, xbm, gif, jpg, or png) located in | |
713 | `widget-glyph-directory'. | |
714 | ||
715 | Optional arguments DOWN and INACTIVE is used instead of IMAGE when the | |
716 | glyph is pressed or inactive, respectively. | |
717 | ||
718 | WARNING: If you call this with a glyph, and you want the user to be | |
719 | able to invoke the glyph, make sure it is unique. If you use the | |
720 | same glyph for multiple widgets, invoking any of the glyphs will | |
0ce5b5d5 PA |
721 | cause the last created widget to be invoked. |
722 | ||
723 | Instead of an instantiator, you can also use a list of instantiators, | |
724 | or whatever `make-glyph' will accept. However, in that case you must | |
725 | provide the fallback TAG as a part of the instantiator yourself." | |
3acab5ef PA |
726 | (let ((glyph (widget-glyph-find image tag))) |
727 | (if glyph | |
728 | (widget-glyph-insert-glyph widget | |
729 | glyph | |
730 | (widget-glyph-find down tag) | |
731 | (widget-glyph-find inactive tag)) | |
732 | (insert tag)))) | |
25ac13b5 PA |
733 | |
734 | (defun widget-glyph-insert-glyph (widget glyph &optional down inactive) | |
3acab5ef PA |
735 | "In WIDGET, insert GLYPH. |
736 | If optional arguments DOWN and INACTIVE are given, they should be | |
737 | glyphs used when the widget is pushed and inactive, respectively." | |
da5ec617 PA |
738 | (when widget |
739 | (set-glyph-property glyph 'widget widget) | |
740 | (when down | |
741 | (set-glyph-property down 'widget widget)) | |
742 | (when inactive | |
743 | (set-glyph-property inactive 'widget widget))) | |
d543e20b | 744 | (insert "*") |
3acab5ef | 745 | (let ((ext (make-extent (point) (1- (point)))) |
da5ec617 | 746 | (help-echo (and widget (widget-get widget :help-echo)))) |
3acab5ef | 747 | (set-extent-property ext 'invisible t) |
8697863a PA |
748 | (set-extent-property ext 'start-open t) |
749 | (set-extent-property ext 'end-open t) | |
3acab5ef PA |
750 | (set-extent-end-glyph ext glyph) |
751 | (when help-echo | |
752 | (set-extent-property ext 'balloon-help help-echo) | |
753 | (set-extent-property ext 'help-echo help-echo))) | |
da5ec617 PA |
754 | (when widget |
755 | (widget-put widget :glyph-up glyph) | |
756 | (when down (widget-put widget :glyph-down down)) | |
757 | (when inactive (widget-put widget :glyph-inactive inactive)))) | |
d543e20b | 758 | |
25ac13b5 PA |
759 | ;;; Buttons. |
760 | ||
761 | (defgroup widget-button nil | |
762 | "The look of various kinds of buttons." | |
763 | :group 'widgets) | |
764 | ||
765 | (defcustom widget-button-prefix "" | |
766 | "String used as prefix for buttons." | |
767 | :type 'string | |
3acab5ef | 768 | :group 'widget-button) |
25ac13b5 PA |
769 | |
770 | (defcustom widget-button-suffix "" | |
771 | "String used as suffix for buttons." | |
772 | :type 'string | |
3acab5ef | 773 | :group 'widget-button) |
25ac13b5 | 774 | |
d543e20b PA |
775 | ;;; Creating Widgets. |
776 | ||
777 | ;;;###autoload | |
778 | (defun widget-create (type &rest args) | |
779 | "Create widget of TYPE. | |
780 | The optional ARGS are additional keyword arguments." | |
781 | (let ((widget (apply 'widget-convert type args))) | |
782 | (widget-apply widget :create) | |
783 | widget)) | |
784 | ||
785 | (defun widget-create-child-and-convert (parent type &rest args) | |
786 | "As part of the widget PARENT, create a child widget TYPE. | |
787 | The child is converted, using the keyword arguments ARGS." | |
788 | (let ((widget (apply 'widget-convert type args))) | |
789 | (widget-put widget :parent parent) | |
790 | (unless (widget-get widget :indent) | |
791 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
792 | (or (widget-get widget :extra-offset) 0) | |
793 | (widget-get parent :offset)))) | |
794 | (widget-apply widget :create) | |
795 | widget)) | |
796 | ||
797 | (defun widget-create-child (parent type) | |
798 | "Create widget of TYPE." | |
ef3f635f | 799 | (let ((widget (copy-sequence type))) |
d543e20b PA |
800 | (widget-put widget :parent parent) |
801 | (unless (widget-get widget :indent) | |
802 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
803 | (or (widget-get widget :extra-offset) 0) | |
804 | (widget-get parent :offset)))) | |
805 | (widget-apply widget :create) | |
806 | widget)) | |
807 | ||
808 | (defun widget-create-child-value (parent type value) | |
809 | "Create widget of TYPE with value VALUE." | |
ef3f635f | 810 | (let ((widget (copy-sequence type))) |
d543e20b PA |
811 | (widget-put widget :value (widget-apply widget :value-to-internal value)) |
812 | (widget-put widget :parent parent) | |
813 | (unless (widget-get widget :indent) | |
814 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
815 | (or (widget-get widget :extra-offset) 0) | |
816 | (widget-get parent :offset)))) | |
817 | (widget-apply widget :create) | |
818 | widget)) | |
819 | ||
820 | ;;;###autoload | |
821 | (defun widget-delete (widget) | |
822 | "Delete WIDGET." | |
823 | (widget-apply widget :delete)) | |
824 | ||
825 | (defun widget-convert (type &rest args) | |
826 | "Convert TYPE to a widget without inserting it in the buffer. | |
827 | The optional ARGS are additional keyword arguments." | |
828 | ;; Don't touch the type. | |
829 | (let* ((widget (if (symbolp type) | |
830 | (list type) | |
ef3f635f | 831 | (copy-sequence type))) |
d543e20b PA |
832 | (current widget) |
833 | (keys args)) | |
834 | ;; First set the :args keyword. | |
835 | (while (cdr current) ;Look in the type. | |
836 | (let ((next (car (cdr current)))) | |
837 | (if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:)) | |
838 | (setq current (cdr (cdr current))) | |
839 | (setcdr current (list :args (cdr current))) | |
840 | (setq current nil)))) | |
841 | (while args ;Look in the args. | |
842 | (let ((next (nth 0 args))) | |
843 | (if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:)) | |
844 | (setq args (nthcdr 2 args)) | |
845 | (widget-put widget :args args) | |
846 | (setq args nil)))) | |
847 | ;; Then Convert the widget. | |
848 | (setq type widget) | |
849 | (while type | |
850 | (let ((convert-widget (plist-get (cdr type) :convert-widget))) | |
851 | (if convert-widget | |
852 | (setq widget (funcall convert-widget widget)))) | |
853 | (setq type (get (car type) 'widget-type))) | |
854 | ;; Finally set the keyword args. | |
855 | (while keys | |
856 | (let ((next (nth 0 keys))) | |
857 | (if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:)) | |
858 | (progn | |
859 | (widget-put widget next (nth 1 keys)) | |
860 | (setq keys (nthcdr 2 keys))) | |
861 | (setq keys nil)))) | |
862 | ;; Convert the :value to internal format. | |
863 | (if (widget-member widget :value) | |
864 | (let ((value (widget-get widget :value))) | |
865 | (widget-put widget | |
866 | :value (widget-apply widget :value-to-internal value)))) | |
867 | ;; Return the newly create widget. | |
868 | widget)) | |
869 | ||
870 | (defun widget-insert (&rest args) | |
871 | "Call `insert' with ARGS and make the text read only." | |
872 | (let ((inhibit-read-only t) | |
c6753d66 | 873 | before-change-functions |
d543e20b PA |
874 | after-change-functions |
875 | (from (point))) | |
876 | (apply 'insert args) | |
877 | (widget-specify-text from (point)))) | |
878 | ||
8697863a PA |
879 | (defun widget-convert-text (type from to |
880 | &optional button-from button-to | |
881 | &rest args) | |
6aaedd12 | 882 | "Return a widget of type TYPE with endpoint FROM TO. |
8697863a | 883 | Optional ARGS are extra keyword arguments for TYPE. |
6aaedd12 PA |
884 | and TO will be used as the widgets end points. If optional arguments |
885 | BUTTON-FROM and BUTTON-TO are given, these will be used as the widgets | |
8697863a PA |
886 | button end points. |
887 | Optional ARGS are extra keyword arguments for TYPE." | |
888 | (let ((widget (apply 'widget-convert type :delete 'widget-leave-text args)) | |
6aaedd12 PA |
889 | (from (copy-marker from)) |
890 | (to (copy-marker to))) | |
891 | (widget-specify-text from to) | |
892 | (set-marker-insertion-type from t) | |
893 | (set-marker-insertion-type to nil) | |
894 | (widget-put widget :from from) | |
895 | (widget-put widget :to to) | |
896 | (when button-from | |
897 | (widget-specify-button widget button-from button-to)) | |
898 | widget)) | |
899 | ||
8697863a | 900 | (defun widget-convert-button (type from to &rest args) |
6aaedd12 | 901 | "Return a widget of type TYPE with endpoint FROM TO. |
8697863a | 902 | Optional ARGS are extra keyword arguments for TYPE. |
6aaedd12 PA |
903 | No text will be inserted to the buffer, instead the text between FROM |
904 | and TO will be used as the widgets end points, as well as the widgets | |
905 | button end points." | |
8697863a PA |
906 | (apply 'widget-convert-text type from to from to args)) |
907 | ||
908 | (defun widget-leave-text (widget) | |
909 | "Remove markers and overlays from WIDGET and its children." | |
910 | (let ((from (widget-get widget :from)) | |
911 | (to (widget-get widget :to)) | |
912 | (button (widget-get widget :button-overlay)) | |
913 | (field (widget-get widget :field-overlay)) | |
914 | (children (widget-get widget :children))) | |
915 | (set-marker from nil) | |
916 | (set-marker to nil) | |
208920be PA |
917 | (when button |
918 | (delete-overlay button)) | |
919 | (when field | |
920 | (delete-overlay field)) | |
8697863a | 921 | (mapcar 'widget-leave-text children))) |
6aaedd12 | 922 | |
d543e20b PA |
923 | ;;; Keymap and Commands. |
924 | ||
925 | (defvar widget-keymap nil | |
926 | "Keymap containing useful binding for buffers containing widgets. | |
927 | Recommended as a parent keymap for modes using widgets.") | |
928 | ||
929 | (unless widget-keymap | |
930 | (setq widget-keymap (make-sparse-keymap)) | |
d543e20b | 931 | (define-key widget-keymap "\t" 'widget-forward) |
d543e20b PA |
932 | (define-key widget-keymap [(shift tab)] 'widget-backward) |
933 | (define-key widget-keymap [backtab] 'widget-backward) | |
a3c88c59 | 934 | (if (string-match "XEmacs" emacs-version) |
d543e20b | 935 | (progn |
a3c88c59 PA |
936 | ;;Glyph support. |
937 | (define-key widget-keymap [button1] 'widget-button1-click) | |
938 | (define-key widget-keymap [button2] 'widget-button-click)) | |
d543e20b PA |
939 | (define-key widget-keymap [down-mouse-2] 'widget-button-click)) |
940 | (define-key widget-keymap "\C-m" 'widget-button-press)) | |
941 | ||
942 | (defvar widget-global-map global-map | |
943 | "Keymap used for events the widget does not handle themselves.") | |
944 | (make-variable-buffer-local 'widget-global-map) | |
945 | ||
946 | (defvar widget-field-keymap nil | |
947 | "Keymap used inside an editable field.") | |
948 | ||
949 | (unless widget-field-keymap | |
950 | (setq widget-field-keymap (copy-keymap widget-keymap)) | |
951 | (unless (string-match "XEmacs" (emacs-version)) | |
952 | (define-key widget-field-keymap [menu-bar] 'nil)) | |
0ce5b5d5 PA |
953 | (define-key widget-field-keymap "\C-k" 'widget-kill-line) |
954 | (define-key widget-field-keymap "\M-\t" 'widget-complete) | |
d543e20b PA |
955 | (define-key widget-field-keymap "\C-m" 'widget-field-activate) |
956 | (define-key widget-field-keymap "\C-a" 'widget-beginning-of-line) | |
957 | (define-key widget-field-keymap "\C-e" 'widget-end-of-line) | |
958 | (set-keymap-parent widget-field-keymap global-map)) | |
959 | ||
960 | (defvar widget-text-keymap nil | |
961 | "Keymap used inside a text field.") | |
962 | ||
963 | (unless widget-text-keymap | |
964 | (setq widget-text-keymap (copy-keymap widget-keymap)) | |
965 | (unless (string-match "XEmacs" (emacs-version)) | |
966 | (define-key widget-text-keymap [menu-bar] 'nil)) | |
967 | (define-key widget-text-keymap "\C-a" 'widget-beginning-of-line) | |
968 | (define-key widget-text-keymap "\C-e" 'widget-end-of-line) | |
969 | (set-keymap-parent widget-text-keymap global-map)) | |
970 | ||
971 | (defun widget-field-activate (pos &optional event) | |
25ac13b5 | 972 | "Invoke the ediable field at point." |
d543e20b | 973 | (interactive "@d") |
0a3a0b56 | 974 | (let ((field (get-char-property pos 'field))) |
d543e20b PA |
975 | (if field |
976 | (widget-apply-action field event) | |
977 | (call-interactively | |
978 | (lookup-key widget-global-map (this-command-keys)))))) | |
979 | ||
a3c88c59 PA |
980 | (defface widget-button-pressed-face |
981 | '((((class color)) | |
982 | (:foreground "red")) | |
983 | (t | |
984 | (:bold t :underline t))) | |
985 | "Face used for pressed buttons." | |
6aaedd12 | 986 | :group 'widget-faces) |
a3c88c59 | 987 | |
d543e20b | 988 | (defun widget-button-click (event) |
25ac13b5 | 989 | "Invoke button below mouse pointer." |
d543e20b PA |
990 | (interactive "@e") |
991 | (cond ((and (fboundp 'event-glyph) | |
992 | (event-glyph event)) | |
a3c88c59 PA |
993 | (widget-glyph-click event)) |
994 | ((widget-event-point event) | |
995 | (let* ((pos (widget-event-point event)) | |
0a3a0b56 | 996 | (button (get-char-property pos 'button))) |
d543e20b | 997 | (if button |
0a3a0b56 PA |
998 | (let* ((overlay (widget-get button :button-overlay)) |
999 | (face (overlay-get overlay 'face)) | |
0ce5b5d5 | 1000 | (mouse-face (overlay-get overlay 'mouse-face))) |
a3c88c59 PA |
1001 | (unwind-protect |
1002 | (let ((track-mouse t)) | |
0a3a0b56 PA |
1003 | (overlay-put overlay |
1004 | 'face 'widget-button-pressed-face) | |
a3c88c59 PA |
1005 | (overlay-put overlay |
1006 | 'mouse-face 'widget-button-pressed-face) | |
1007 | (unless (widget-apply button :mouse-down-action event) | |
1008 | (while (not (button-release-event-p event)) | |
0ce5b5d5 | 1009 | (setq event (widget-read-event) |
a3c88c59 PA |
1010 | pos (widget-event-point event)) |
1011 | (if (and pos | |
0a3a0b56 | 1012 | (eq (get-char-property pos 'button) |
a3c88c59 PA |
1013 | button)) |
1014 | (progn | |
1015 | (overlay-put overlay | |
1016 | 'face | |
1017 | 'widget-button-pressed-face) | |
1018 | (overlay-put overlay | |
1019 | 'mouse-face | |
1020 | 'widget-button-pressed-face)) | |
0a3a0b56 PA |
1021 | (overlay-put overlay 'face face) |
1022 | (overlay-put overlay 'mouse-face mouse-face)))) | |
a3c88c59 | 1023 | (when (and pos |
0a3a0b56 | 1024 | (eq (get-char-property pos 'button) button)) |
a3c88c59 | 1025 | (widget-apply-action button event))) |
0a3a0b56 PA |
1026 | (overlay-put overlay 'face face) |
1027 | (overlay-put overlay 'mouse-face mouse-face))) | |
da5ec617 PA |
1028 | (let ((up t) |
1029 | command) | |
0ce5b5d5 PA |
1030 | ;; Find the global command to run, and check whether it |
1031 | ;; is bound to an up event. | |
1032 | (cond ((setq command ;down event | |
da5ec617 PA |
1033 | (lookup-key widget-global-map [ button2 ])) |
1034 | (setq up nil)) | |
0ce5b5d5 | 1035 | ((setq command ;down event |
da5ec617 PA |
1036 | (lookup-key widget-global-map [ down-mouse-2 ])) |
1037 | (setq up nil)) | |
0ce5b5d5 | 1038 | ((setq command ;up event |
da5ec617 | 1039 | (lookup-key widget-global-map [ button2up ]))) |
0ce5b5d5 | 1040 | ((setq command ;up event |
da5ec617 PA |
1041 | (lookup-key widget-global-map [ mouse-2])))) |
1042 | (when up | |
0ce5b5d5 | 1043 | ;; Don't execute up events twice. |
da5ec617 PA |
1044 | (while (not (button-release-event-p event)) |
1045 | (setq event (widget-read-event)))) | |
1046 | (when command | |
0ce5b5d5 | 1047 | (call-interactively command)))))) |
d543e20b PA |
1048 | (t |
1049 | (message "You clicked somewhere weird.")))) | |
1050 | ||
1051 | (defun widget-button1-click (event) | |
25ac13b5 | 1052 | "Invoke glyph below mouse pointer." |
d543e20b PA |
1053 | (interactive "@e") |
1054 | (if (and (fboundp 'event-glyph) | |
1055 | (event-glyph event)) | |
a3c88c59 | 1056 | (widget-glyph-click event) |
d543e20b PA |
1057 | (call-interactively (lookup-key widget-global-map (this-command-keys))))) |
1058 | ||
a3c88c59 PA |
1059 | (defun widget-glyph-click (event) |
1060 | "Handle click on a glyph." | |
1061 | (let* ((glyph (event-glyph event)) | |
1062 | (widget (glyph-property glyph 'widget)) | |
1063 | (extent (event-glyph-extent event)) | |
1064 | (down-glyph (or (and widget (widget-get widget :glyph-down)) glyph)) | |
1065 | (up-glyph (or (and widget (widget-get widget :glyph-up)) glyph)) | |
1066 | (last event)) | |
1067 | ;; Wait for the release. | |
1068 | (while (not (button-release-event-p last)) | |
1069 | (if (eq extent (event-glyph-extent last)) | |
1070 | (set-extent-property extent 'end-glyph down-glyph) | |
1071 | (set-extent-property extent 'end-glyph up-glyph)) | |
1072 | (setq last (next-event event))) | |
1073 | ;; Release glyph. | |
1074 | (when down-glyph | |
1075 | (set-extent-property extent 'end-glyph up-glyph)) | |
1076 | ;; Apply widget action. | |
1077 | (when (eq extent (event-glyph-extent last)) | |
1078 | (let ((widget (glyph-property (event-glyph event) 'widget))) | |
1079 | (cond ((null widget) | |
1080 | (message "You clicked on a glyph.")) | |
1081 | ((not (widget-apply widget :active)) | |
1082 | (message "This glyph is inactive.")) | |
1083 | (t | |
1084 | (widget-apply-action widget event))))))) | |
1085 | ||
d543e20b | 1086 | (defun widget-button-press (pos &optional event) |
25ac13b5 | 1087 | "Invoke button at POS." |
d543e20b | 1088 | (interactive "@d") |
0a3a0b56 | 1089 | (let ((button (get-char-property pos 'button))) |
d543e20b PA |
1090 | (if button |
1091 | (widget-apply-action button event) | |
1092 | (let ((command (lookup-key widget-global-map (this-command-keys)))) | |
1093 | (when (commandp command) | |
1094 | (call-interactively command)))))) | |
1095 | ||
8697863a PA |
1096 | (defun widget-tabable-at (&optional pos) |
1097 | "Return the tabable widget at POS, or nil. | |
1098 | POS defaults to the value of (point)." | |
1099 | (unless pos | |
1100 | (setq pos (point))) | |
1101 | (let ((widget (or (get-char-property (point) 'button) | |
1102 | (get-char-property (point) 'field)))) | |
1103 | (if widget | |
1104 | (let ((order (widget-get widget :tab-order))) | |
1105 | (if order | |
1106 | (if (>= order 0) | |
1107 | widget | |
1108 | nil) | |
1109 | widget)) | |
1110 | nil))) | |
1111 | ||
d543e20b PA |
1112 | (defun widget-move (arg) |
1113 | "Move point to the ARG next field or button. | |
1114 | ARG may be negative to move backward." | |
0a3a0b56 | 1115 | (or (bobp) (> arg 0) (backward-char)) |
0ce5b5d5 | 1116 | (let ((pos (point)) |
0a3a0b56 | 1117 | (number arg) |
8697863a | 1118 | (old (widget-tabable-at)) |
0a3a0b56 PA |
1119 | new) |
1120 | ;; Forward. | |
1121 | (while (> arg 0) | |
1122 | (if (eobp) | |
1123 | (goto-char (point-min)) | |
d543e20b | 1124 | (forward-char 1)) |
0a3a0b56 PA |
1125 | (and (eq pos (point)) |
1126 | (eq arg number) | |
1127 | (error "No buttons or fields found")) | |
8697863a | 1128 | (let ((new (widget-tabable-at))) |
0a3a0b56 PA |
1129 | (when new |
1130 | (unless (eq new old) | |
8697863a | 1131 | (setq arg (1- arg)) |
0a3a0b56 PA |
1132 | (setq old new))))) |
1133 | ;; Backward. | |
1134 | (while (< arg 0) | |
1135 | (if (bobp) | |
1136 | (goto-char (point-max)) | |
1137 | (backward-char 1)) | |
1138 | (and (eq pos (point)) | |
1139 | (eq arg number) | |
1140 | (error "No buttons or fields found")) | |
8697863a | 1141 | (let ((new (widget-tabable-at))) |
0a3a0b56 PA |
1142 | (when new |
1143 | (unless (eq new old) | |
8697863a PA |
1144 | (setq arg (1+ arg)))))) |
1145 | (let ((new (widget-tabable-at))) | |
1146 | (while (eq (widget-tabable-at) new) | |
1147 | (backward-char))) | |
0ce5b5d5 PA |
1148 | (forward-char)) |
1149 | (widget-echo-help (point)) | |
1150 | (run-hooks 'widget-move-hook)) | |
d543e20b PA |
1151 | |
1152 | (defun widget-forward (arg) | |
1153 | "Move point to the next field or button. | |
1154 | With optional ARG, move across that many fields." | |
1155 | (interactive "p") | |
1156 | (run-hooks 'widget-forward-hook) | |
1157 | (widget-move arg)) | |
1158 | ||
1159 | (defun widget-backward (arg) | |
1160 | "Move point to the previous field or button. | |
1161 | With optional ARG, move across that many fields." | |
1162 | (interactive "p") | |
1163 | (run-hooks 'widget-backward-hook) | |
1164 | (widget-move (- arg))) | |
1165 | ||
1166 | (defun widget-beginning-of-line () | |
1167 | "Go to beginning of field or beginning of line, whichever is first." | |
1168 | (interactive) | |
0ce5b5d5 PA |
1169 | (let* ((field (widget-field-find (point))) |
1170 | (start (and field (widget-field-start field)))) | |
1171 | (if (and start (not (eq start (point)))) | |
1172 | (goto-char start) | |
1173 | (call-interactively 'beginning-of-line)))) | |
d543e20b PA |
1174 | |
1175 | (defun widget-end-of-line () | |
1176 | "Go to end of field or end of line, whichever is first." | |
1177 | (interactive) | |
0ce5b5d5 PA |
1178 | (let* ((field (widget-field-find (point))) |
1179 | (end (and field (widget-field-end field)))) | |
1180 | (if (and end (not (eq end (point)))) | |
1181 | (goto-char end) | |
1182 | (call-interactively 'end-of-line)))) | |
d543e20b PA |
1183 | |
1184 | (defun widget-kill-line () | |
1185 | "Kill to end of field or end of line, whichever is first." | |
1186 | (interactive) | |
0ce5b5d5 PA |
1187 | (let* ((field (widget-field-find (point))) |
1188 | (newline (save-excursion (forward-line 1) (point))) | |
1189 | (end (and field (widget-field-end field)))) | |
1190 | (if (and field (> newline end)) | |
1191 | (kill-region (point) end) | |
d543e20b PA |
1192 | (call-interactively 'kill-line)))) |
1193 | ||
0ce5b5d5 PA |
1194 | (defcustom widget-complete-field (lookup-key global-map "\M-\t") |
1195 | "Default function to call for completion inside fields." | |
1196 | :options '(ispell-complete-word complete-tag lisp-complete-symbol) | |
1197 | :type 'function | |
1198 | :group 'widgets) | |
1199 | ||
1200 | (defun widget-complete () | |
1201 | "Complete content of editable field from point. | |
1202 | When not inside a field, move to the previous button or field." | |
1203 | (interactive) | |
1204 | (let ((field (widget-field-find (point)))) | |
1205 | (if field | |
1206 | (widget-apply field :complete) | |
1207 | (error "Not in an editable field")))) | |
1208 | ||
d543e20b PA |
1209 | ;;; Setting up the buffer. |
1210 | ||
1211 | (defvar widget-field-new nil) | |
1212 | ;; List of all newly created editable fields in the buffer. | |
1213 | (make-variable-buffer-local 'widget-field-new) | |
1214 | ||
1215 | (defvar widget-field-list nil) | |
1216 | ;; List of all editable fields in the buffer. | |
1217 | (make-variable-buffer-local 'widget-field-list) | |
1218 | ||
1219 | (defun widget-setup () | |
1220 | "Setup current buffer so editing string widgets works." | |
1221 | (let ((inhibit-read-only t) | |
1222 | (after-change-functions nil) | |
c6753d66 | 1223 | before-change-functions |
d543e20b PA |
1224 | field) |
1225 | (while widget-field-new | |
1226 | (setq field (car widget-field-new) | |
1227 | widget-field-new (cdr widget-field-new) | |
1228 | widget-field-list (cons field widget-field-list)) | |
0a3a0b56 PA |
1229 | (let ((from (car (widget-get field :field-overlay))) |
1230 | (to (cdr (widget-get field :field-overlay)))) | |
6aaedd12 PA |
1231 | (widget-specify-field field |
1232 | (marker-position from) (marker-position to)) | |
0a3a0b56 PA |
1233 | (set-marker from nil) |
1234 | (set-marker to nil)))) | |
d543e20b PA |
1235 | (widget-clear-undo) |
1236 | ;; We need to maintain text properties and size of the editing fields. | |
1237 | (make-local-variable 'after-change-functions) | |
c6753d66 RS |
1238 | (setq after-change-functions |
1239 | (if widget-field-list '(widget-after-change) nil)) | |
da5ec617 PA |
1240 | (when widget-field-use-before-change |
1241 | (make-local-variable 'before-change-functions) | |
1242 | (setq before-change-functions | |
1243 | (if widget-field-list '(widget-before-change) nil)))) | |
d543e20b PA |
1244 | |
1245 | (defvar widget-field-last nil) | |
1246 | ;; Last field containing point. | |
1247 | (make-variable-buffer-local 'widget-field-last) | |
1248 | ||
1249 | (defvar widget-field-was nil) | |
1250 | ;; The widget data before the change. | |
1251 | (make-variable-buffer-local 'widget-field-was) | |
1252 | ||
0a3a0b56 PA |
1253 | (defun widget-field-buffer (widget) |
1254 | "Return the start of WIDGET's editing field." | |
6aaedd12 PA |
1255 | (let ((overlay (widget-get widget :field-overlay))) |
1256 | (and overlay (overlay-buffer overlay)))) | |
0a3a0b56 PA |
1257 | |
1258 | (defun widget-field-start (widget) | |
1259 | "Return the start of WIDGET's editing field." | |
6aaedd12 PA |
1260 | (let ((overlay (widget-get widget :field-overlay))) |
1261 | (and overlay (overlay-start overlay)))) | |
0a3a0b56 PA |
1262 | |
1263 | (defun widget-field-end (widget) | |
1264 | "Return the end of WIDGET's editing field." | |
6aaedd12 PA |
1265 | (let ((overlay (widget-get widget :field-overlay))) |
1266 | ;; Don't subtract one if local-map works at the end of the overlay. | |
8697863a PA |
1267 | (and overlay (if widget-field-add-space |
1268 | (1- (overlay-end overlay)) | |
1269 | (overlay-end overlay))))) | |
0a3a0b56 | 1270 | |
d543e20b | 1271 | (defun widget-field-find (pos) |
0a3a0b56 PA |
1272 | "Return the field at POS. |
1273 | Unlike (get-char-property POS 'field) this, works with empty fields too." | |
d543e20b PA |
1274 | (let ((fields widget-field-list) |
1275 | field found) | |
1276 | (while fields | |
1277 | (setq field (car fields) | |
1278 | fields (cdr fields)) | |
0a3a0b56 PA |
1279 | (let ((start (widget-field-start field)) |
1280 | (end (widget-field-end field))) | |
1281 | (when (and (<= start pos) (<= pos end)) | |
1282 | (when found | |
1283 | (debug "Overlapping fields")) | |
1284 | (setq found field)))) | |
d543e20b PA |
1285 | found)) |
1286 | ||
c6753d66 | 1287 | (defun widget-before-change (from &rest ignore) |
944c91b6 PA |
1288 | ;; This is how, for example, a variable changes its state to `modified'. |
1289 | ;; when it is being edited. | |
c6753d66 RS |
1290 | (condition-case nil |
1291 | (let ((field (widget-field-find from))) | |
1292 | (widget-apply field :notify field)) | |
944c91b6 | 1293 | (error (debug "Before Change")))) |
c6753d66 | 1294 | |
d543e20b PA |
1295 | (defun widget-after-change (from to old) |
1296 | ;; Adjust field size and text properties. | |
1297 | (condition-case nil | |
1298 | (let ((field (widget-field-find from)) | |
0a3a0b56 PA |
1299 | (other (widget-field-find to))) |
1300 | (when field | |
1301 | (unless (eq field other) | |
1302 | (debug "Change in different fields")) | |
8697863a PA |
1303 | (let ((size (widget-get field :size)) |
1304 | (secret (widget-get field :secret))) | |
0a3a0b56 PA |
1305 | (when size |
1306 | (let ((begin (widget-field-start field)) | |
1307 | (end (widget-field-end field))) | |
1308 | (cond ((< (- end begin) size) | |
1309 | ;; Field too small. | |
1310 | (save-excursion | |
1311 | (goto-char end) | |
1312 | (insert-char ?\ (- (+ begin size) end)))) | |
1313 | ((> (- end begin) size) | |
1314 | ;; Field too large and | |
1315 | (if (or (< (point) (+ begin size)) | |
1316 | (> (point) end)) | |
1317 | ;; Point is outside extra space. | |
1318 | (setq begin (+ begin size)) | |
1319 | ;; Point is within the extra space. | |
1320 | (setq begin (point))) | |
1321 | (save-excursion | |
1322 | (goto-char end) | |
1323 | (while (and (eq (preceding-char) ?\ ) | |
1324 | (> (point) begin)) | |
8697863a PA |
1325 | (delete-backward-char 1))))))) |
1326 | (when secret | |
1327 | (let ((begin (widget-field-start field)) | |
1328 | (end (widget-field-end field))) | |
1329 | (when size | |
1330 | (while (and (> end begin) | |
1331 | (eq (char-after (1- end)) ?\ )) | |
1332 | (setq end (1- end)))) | |
1333 | (while (< begin end) | |
1334 | (let ((old (char-after begin))) | |
1335 | (unless (eq old secret) | |
1336 | (subst-char-in-region begin (1+ begin) old secret) | |
1337 | (put-text-property begin (1+ begin) 'secret old)) | |
944c91b6 PA |
1338 | (setq begin (1+ begin))))))) |
1339 | (widget-apply field :notify field))) | |
0a3a0b56 | 1340 | (error (debug "After Change")))) |
d543e20b PA |
1341 | |
1342 | ;;; Widget Functions | |
1343 | ;; | |
1344 | ;; These functions are used in the definition of multiple widgets. | |
1345 | ||
a3c88c59 PA |
1346 | (defun widget-parent-action (widget &optional event) |
1347 | "Tell :parent of WIDGET to handle the :action. | |
1348 | Optional EVENT is the event that triggered the action." | |
1349 | (widget-apply (widget-get widget :parent) :action event)) | |
1350 | ||
d543e20b PA |
1351 | (defun widget-children-value-delete (widget) |
1352 | "Delete all :children and :buttons in WIDGET." | |
1353 | (mapcar 'widget-delete (widget-get widget :children)) | |
1354 | (widget-put widget :children nil) | |
1355 | (mapcar 'widget-delete (widget-get widget :buttons)) | |
1356 | (widget-put widget :buttons nil)) | |
1357 | ||
a3c88c59 PA |
1358 | (defun widget-children-validate (widget) |
1359 | "All the :children must be valid." | |
1360 | (let ((children (widget-get widget :children)) | |
1361 | child found) | |
1362 | (while (and children (not found)) | |
1363 | (setq child (car children) | |
1364 | children (cdr children) | |
1365 | found (widget-apply child :validate))) | |
1366 | found)) | |
1367 | ||
d543e20b PA |
1368 | (defun widget-types-convert-widget (widget) |
1369 | "Convert :args as widget types in WIDGET." | |
1370 | (widget-put widget :args (mapcar 'widget-convert (widget-get widget :args))) | |
1371 | widget) | |
1372 | ||
a3c88c59 PA |
1373 | (defun widget-value-convert-widget (widget) |
1374 | "Initialize :value from :args in WIDGET." | |
1375 | (let ((args (widget-get widget :args))) | |
1376 | (when args | |
1377 | (widget-put widget :value (car args)) | |
1378 | ;; Don't convert :value here, as this is done in `widget-convert'. | |
1379 | ;; (widget-put widget :value (widget-apply widget | |
1380 | ;; :value-to-internal (car args))) | |
1381 | (widget-put widget :args nil))) | |
1382 | widget) | |
1383 | ||
1384 | (defun widget-value-value-get (widget) | |
1385 | "Return the :value property of WIDGET." | |
1386 | (widget-get widget :value)) | |
1387 | ||
d543e20b PA |
1388 | ;;; The `default' Widget. |
1389 | ||
1390 | (define-widget 'default nil | |
1391 | "Basic widget other widgets are derived from." | |
1392 | :value-to-internal (lambda (widget value) value) | |
1393 | :value-to-external (lambda (widget value) value) | |
25ac13b5 PA |
1394 | :button-prefix 'widget-button-prefix |
1395 | :button-suffix 'widget-button-suffix | |
0ce5b5d5 | 1396 | :complete 'widget-default-complete |
d543e20b PA |
1397 | :create 'widget-default-create |
1398 | :indent nil | |
1399 | :offset 0 | |
1400 | :format-handler 'widget-default-format-handler | |
1401 | :button-face-get 'widget-default-button-face-get | |
1402 | :sample-face-get 'widget-default-sample-face-get | |
1403 | :delete 'widget-default-delete | |
1404 | :value-set 'widget-default-value-set | |
1405 | :value-inline 'widget-default-value-inline | |
1406 | :menu-tag-get 'widget-default-menu-tag-get | |
1407 | :validate (lambda (widget) nil) | |
1408 | :active 'widget-default-active | |
1409 | :activate 'widget-specify-active | |
1410 | :deactivate 'widget-default-deactivate | |
a3c88c59 | 1411 | :mouse-down-action (lambda (widget event) nil) |
d543e20b | 1412 | :action 'widget-default-action |
6d528fc5 PA |
1413 | :notify 'widget-default-notify |
1414 | :prompt-value 'widget-default-prompt-value) | |
d543e20b | 1415 | |
0ce5b5d5 PA |
1416 | (defun widget-default-complete (widget) |
1417 | "Call the value of the :complete-function property of WIDGET. | |
1418 | If that does not exists, call the value of `widget-complete-field'." | |
1419 | (let ((fun (widget-get widget :complete-function))) | |
1420 | (call-interactively (or fun widget-complete-field)))) | |
1421 | ||
d543e20b PA |
1422 | (defun widget-default-create (widget) |
1423 | "Create WIDGET at point in the current buffer." | |
1424 | (widget-specify-insert | |
1425 | (let ((from (point)) | |
d543e20b PA |
1426 | button-begin button-end |
1427 | sample-begin sample-end | |
1428 | doc-begin doc-end | |
1429 | value-pos) | |
1430 | (insert (widget-get widget :format)) | |
1431 | (goto-char from) | |
1432 | ;; Parse escapes in format. | |
1433 | (while (re-search-forward "%\\(.\\)" nil t) | |
1434 | (let ((escape (aref (match-string 1) 0))) | |
1435 | (replace-match "" t t) | |
1436 | (cond ((eq escape ?%) | |
1437 | (insert "%")) | |
1438 | ((eq escape ?\[) | |
25ac13b5 | 1439 | (setq button-begin (point)) |
944c91b6 | 1440 | (insert (widget-get-indirect widget :button-prefix))) |
d543e20b | 1441 | ((eq escape ?\]) |
944c91b6 | 1442 | (insert (widget-get-indirect widget :button-suffix)) |
d543e20b PA |
1443 | (setq button-end (point))) |
1444 | ((eq escape ?\{) | |
1445 | (setq sample-begin (point))) | |
1446 | ((eq escape ?\}) | |
1447 | (setq sample-end (point))) | |
1448 | ((eq escape ?n) | |
1449 | (when (widget-get widget :indent) | |
1450 | (insert "\n") | |
1451 | (insert-char ? (widget-get widget :indent)))) | |
1452 | ((eq escape ?t) | |
25ac13b5 PA |
1453 | (let ((glyph (widget-get widget :tag-glyph)) |
1454 | (tag (widget-get widget :tag))) | |
1455 | (cond (glyph | |
1456 | (widget-glyph-insert widget (or tag "image") glyph)) | |
1457 | (tag | |
1458 | (insert tag)) | |
1459 | (t | |
1460 | (let ((standard-output (current-buffer))) | |
1461 | (princ (widget-get widget :value))))))) | |
d543e20b | 1462 | ((eq escape ?d) |
25ac13b5 PA |
1463 | (let ((doc (widget-get widget :doc))) |
1464 | (when doc | |
1465 | (setq doc-begin (point)) | |
1466 | (insert doc) | |
1467 | (while (eq (preceding-char) ?\n) | |
1468 | (delete-backward-char 1)) | |
1469 | (insert "\n") | |
1470 | (setq doc-end (point))))) | |
d543e20b PA |
1471 | ((eq escape ?v) |
1472 | (if (and button-begin (not button-end)) | |
1473 | (widget-apply widget :value-create) | |
1474 | (setq value-pos (point)))) | |
1475 | (t | |
1476 | (widget-apply widget :format-handler escape))))) | |
1477 | ;; Specify button, sample, and doc, and insert value. | |
1478 | (and button-begin button-end | |
1479 | (widget-specify-button widget button-begin button-end)) | |
1480 | (and sample-begin sample-end | |
1481 | (widget-specify-sample widget sample-begin sample-end)) | |
1482 | (and doc-begin doc-end | |
1483 | (widget-specify-doc widget doc-begin doc-end)) | |
1484 | (when value-pos | |
1485 | (goto-char value-pos) | |
1486 | (widget-apply widget :value-create))) | |
1487 | (let ((from (copy-marker (point-min))) | |
1488 | (to (copy-marker (point-max)))) | |
1489 | (widget-specify-text from to) | |
1490 | (set-marker-insertion-type from t) | |
1491 | (set-marker-insertion-type to nil) | |
1492 | (widget-put widget :from from) | |
6d528fc5 PA |
1493 | (widget-put widget :to to))) |
1494 | (widget-clear-undo)) | |
d543e20b PA |
1495 | |
1496 | (defun widget-default-format-handler (widget escape) | |
1497 | ;; We recognize the %h escape by default. | |
6aaedd12 | 1498 | (let* ((buttons (widget-get widget :buttons))) |
d543e20b | 1499 | (cond ((eq escape ?h) |
6aaedd12 PA |
1500 | (let* ((doc-property (widget-get widget :documentation-property)) |
1501 | (doc-try (cond ((widget-get widget :doc)) | |
1502 | ((symbolp doc-property) | |
1503 | (documentation-property | |
1504 | (widget-get widget :value) | |
1505 | doc-property)) | |
1506 | (t | |
1507 | (funcall doc-property | |
1508 | (widget-get widget :value))))) | |
1509 | (doc-text (and (stringp doc-try) | |
1510 | (> (length doc-try) 1) | |
8697863a PA |
1511 | doc-try)) |
1512 | (doc-indent (widget-get widget :documentation-indent))) | |
6aaedd12 PA |
1513 | (when doc-text |
1514 | (and (eq (preceding-char) ?\n) | |
1515 | (widget-get widget :indent) | |
1516 | (insert-char ? (widget-get widget :indent))) | |
1517 | ;; The `*' in the beginning is redundant. | |
1518 | (when (eq (aref doc-text 0) ?*) | |
1519 | (setq doc-text (substring doc-text 1))) | |
1520 | ;; Get rid of trailing newlines. | |
1521 | (when (string-match "\n+\\'" doc-text) | |
1522 | (setq doc-text (substring doc-text 0 (match-beginning 0)))) | |
1523 | (push (widget-create-child-and-convert | |
1524 | widget 'documentation-string | |
8697863a PA |
1525 | :indent (cond ((numberp doc-indent ) |
1526 | doc-indent) | |
1527 | ((null doc-indent) | |
1528 | nil) | |
1529 | (t 0)) | |
6aaedd12 PA |
1530 | doc-text) |
1531 | buttons)))) | |
d543e20b PA |
1532 | (t |
1533 | (error "Unknown escape `%c'" escape))) | |
1534 | (widget-put widget :buttons buttons))) | |
1535 | ||
0b296dac RS |
1536 | (defvar widget-button-face nil |
1537 | "Face to use for buttons. | |
1538 | This is a variable so that it can be buffer-local.") | |
1539 | ||
d543e20b PA |
1540 | (defun widget-default-button-face-get (widget) |
1541 | ;; Use :button-face or widget-button-face | |
0b296dac RS |
1542 | (or (widget-get widget :button-face) |
1543 | (let ((parent (widget-get widget :parent))) | |
1544 | (if parent | |
1545 | (widget-apply parent :button-face-get) | |
1546 | 'widget-button-face)))) | |
d543e20b PA |
1547 | |
1548 | (defun widget-default-sample-face-get (widget) | |
1549 | ;; Use :sample-face. | |
1550 | (widget-get widget :sample-face)) | |
1551 | ||
1552 | (defun widget-default-delete (widget) | |
1553 | ;; Remove widget from the buffer. | |
1554 | (let ((from (widget-get widget :from)) | |
1555 | (to (widget-get widget :to)) | |
9097aeb7 PA |
1556 | (inactive-overlay (widget-get widget :inactive)) |
1557 | (button-overlay (widget-get widget :button-overlay)) | |
c6753d66 | 1558 | before-change-functions |
0a3a0b56 PA |
1559 | after-change-functions |
1560 | (inhibit-read-only t)) | |
d543e20b | 1561 | (widget-apply widget :value-delete) |
9097aeb7 PA |
1562 | (when inactive-overlay |
1563 | (delete-overlay inactive-overlay)) | |
1564 | (when button-overlay | |
1565 | (delete-overlay button-overlay)) | |
d543e20b PA |
1566 | (when (< from to) |
1567 | ;; Kludge: this doesn't need to be true for empty formats. | |
1568 | (delete-region from to)) | |
1569 | (set-marker from nil) | |
6d528fc5 PA |
1570 | (set-marker to nil)) |
1571 | (widget-clear-undo)) | |
d543e20b PA |
1572 | |
1573 | (defun widget-default-value-set (widget value) | |
1574 | ;; Recreate widget with new value. | |
d0acc4ea RS |
1575 | (let* ((old-pos (point)) |
1576 | (from (copy-marker (widget-get widget :from))) | |
1577 | (to (copy-marker (widget-get widget :to))) | |
1578 | (offset (if (and (<= from old-pos) (<= old-pos to)) | |
1579 | (if (>= old-pos (1- to)) | |
1580 | (- old-pos to 1) | |
1581 | (- old-pos from))))) | |
1582 | ;;??? Bug: this ought to insert the new value before deleting the old one, | |
1583 | ;; so that markers on either side of the value automatically | |
1584 | ;; stay on the same side. -- rms. | |
1585 | (save-excursion | |
1586 | (goto-char (widget-get widget :from)) | |
1587 | (widget-apply widget :delete) | |
1588 | (widget-put widget :value value) | |
1589 | (widget-apply widget :create)) | |
1590 | (if offset | |
1591 | (if (< offset 0) | |
1592 | (goto-char (+ (widget-get widget :to) offset 1)) | |
1593 | (goto-char (min (+ from offset) (1- (widget-get widget :to)))))))) | |
d543e20b PA |
1594 | |
1595 | (defun widget-default-value-inline (widget) | |
1596 | ;; Wrap value in a list unless it is inline. | |
1597 | (if (widget-get widget :inline) | |
1598 | (widget-value widget) | |
1599 | (list (widget-value widget)))) | |
1600 | ||
1601 | (defun widget-default-menu-tag-get (widget) | |
1602 | ;; Use tag or value for menus. | |
1603 | (or (widget-get widget :menu-tag) | |
1604 | (widget-get widget :tag) | |
1605 | (widget-princ-to-string (widget-get widget :value)))) | |
1606 | ||
1607 | (defun widget-default-active (widget) | |
1608 | "Return t iff this widget active (user modifiable)." | |
1609 | (and (not (widget-get widget :inactive)) | |
1610 | (let ((parent (widget-get widget :parent))) | |
1611 | (or (null parent) | |
1612 | (widget-apply parent :active))))) | |
1613 | ||
1614 | (defun widget-default-deactivate (widget) | |
1615 | "Make WIDGET inactive for user modifications." | |
1616 | (widget-specify-inactive widget | |
1617 | (widget-get widget :from) | |
1618 | (widget-get widget :to))) | |
1619 | ||
1620 | (defun widget-default-action (widget &optional event) | |
1621 | ;; Notify the parent when a widget change | |
1622 | (let ((parent (widget-get widget :parent))) | |
1623 | (when parent | |
1624 | (widget-apply parent :notify widget event)))) | |
1625 | ||
1626 | (defun widget-default-notify (widget child &optional event) | |
1627 | ;; Pass notification to parent. | |
1628 | (widget-default-action widget event)) | |
1629 | ||
6d528fc5 PA |
1630 | (defun widget-default-prompt-value (widget prompt value unbound) |
1631 | ;; Read an arbitrary value. Stolen from `set-variable'. | |
1632 | ;; (let ((initial (if unbound | |
1633 | ;; nil | |
1634 | ;; ;; It would be nice if we could do a `(cons val 1)' here. | |
1635 | ;; (prin1-to-string (custom-quote value)))))) | |
1636 | (eval-minibuffer prompt )) | |
1637 | ||
d543e20b PA |
1638 | ;;; The `item' Widget. |
1639 | ||
1640 | (define-widget 'item 'default | |
1641 | "Constant items for inclusion in other widgets." | |
a3c88c59 | 1642 | :convert-widget 'widget-value-convert-widget |
d543e20b PA |
1643 | :value-create 'widget-item-value-create |
1644 | :value-delete 'ignore | |
a3c88c59 | 1645 | :value-get 'widget-value-value-get |
d543e20b PA |
1646 | :match 'widget-item-match |
1647 | :match-inline 'widget-item-match-inline | |
1648 | :action 'widget-item-action | |
1649 | :format "%t\n") | |
1650 | ||
d543e20b PA |
1651 | (defun widget-item-value-create (widget) |
1652 | ;; Insert the printed representation of the value. | |
1653 | (let ((standard-output (current-buffer))) | |
1654 | (princ (widget-get widget :value)))) | |
1655 | ||
1656 | (defun widget-item-match (widget value) | |
1657 | ;; Match if the value is the same. | |
1658 | (equal (widget-get widget :value) value)) | |
1659 | ||
1660 | (defun widget-item-match-inline (widget values) | |
1661 | ;; Match if the value is the same. | |
1662 | (let ((value (widget-get widget :value))) | |
1663 | (and (listp value) | |
1664 | (<= (length value) (length values)) | |
e5dfabb4 | 1665 | (let ((head (widget-sublist values 0 (length value)))) |
d543e20b | 1666 | (and (equal head value) |
e5dfabb4 RS |
1667 | (cons head (widget-sublist values (length value)))))))) |
1668 | ||
1669 | (defun widget-sublist (list start &optional end) | |
1670 | "Return the sublist of LIST from START to END. | |
1671 | If END is omitted, it defaults to the length of LIST." | |
0a3a0b56 PA |
1672 | (if (> start 0) (setq list (nthcdr start list))) |
1673 | (if end | |
1674 | (if (<= end start) | |
1675 | nil | |
1676 | (setq list (copy-sequence list)) | |
1677 | (setcdr (nthcdr (- end start 1) list) nil) | |
1678 | list) | |
1679 | (copy-sequence list))) | |
d543e20b PA |
1680 | |
1681 | (defun widget-item-action (widget &optional event) | |
1682 | ;; Just notify itself. | |
1683 | (widget-apply widget :notify widget event)) | |
1684 | ||
d543e20b PA |
1685 | ;;; The `push-button' Widget. |
1686 | ||
1687 | (defcustom widget-push-button-gui t | |
1688 | "If non nil, use GUI push buttons when available." | |
1689 | :group 'widgets | |
1690 | :type 'boolean) | |
1691 | ||
1692 | ;; Cache already created GUI objects. | |
1693 | (defvar widget-push-button-cache nil) | |
1694 | ||
25ac13b5 PA |
1695 | (defcustom widget-push-button-prefix "[" |
1696 | "String used as prefix for buttons." | |
1697 | :type 'string | |
1698 | :group 'widget-button) | |
1699 | ||
1700 | (defcustom widget-push-button-suffix "]" | |
1701 | "String used as suffix for buttons." | |
1702 | :type 'string | |
1703 | :group 'widget-button) | |
1704 | ||
d543e20b PA |
1705 | (define-widget 'push-button 'item |
1706 | "A pushable button." | |
25ac13b5 PA |
1707 | :button-prefix "" |
1708 | :button-suffix "" | |
d543e20b PA |
1709 | :value-create 'widget-push-button-value-create |
1710 | :format "%[%v%]") | |
1711 | ||
1712 | (defun widget-push-button-value-create (widget) | |
1713 | ;; Insert text representing the `on' and `off' states. | |
1714 | (let* ((tag (or (widget-get widget :tag) | |
1715 | (widget-get widget :value))) | |
da5ec617 | 1716 | (tag-glyph (widget-get widget :tag-glyph)) |
25ac13b5 PA |
1717 | (text (concat widget-push-button-prefix |
1718 | tag widget-push-button-suffix)) | |
d543e20b | 1719 | (gui (cdr (assoc tag widget-push-button-cache)))) |
da5ec617 PA |
1720 | (cond (tag-glyph |
1721 | (widget-glyph-insert widget text tag-glyph)) | |
1722 | ((and (fboundp 'make-gui-button) | |
d543e20b PA |
1723 | (fboundp 'make-glyph) |
1724 | widget-push-button-gui | |
1725 | (fboundp 'device-on-window-system-p) | |
1726 | (device-on-window-system-p) | |
1727 | (string-match "XEmacs" emacs-version)) | |
da5ec617 PA |
1728 | (unless gui |
1729 | (setq gui (make-gui-button tag 'widget-gui-action widget)) | |
1730 | (push (cons tag gui) widget-push-button-cache)) | |
1731 | (widget-glyph-insert-glyph widget | |
1732 | (make-glyph | |
1733 | (list (nth 0 (aref gui 1)) | |
1734 | (vector 'string ':data text))) | |
1735 | (make-glyph | |
1736 | (list (nth 1 (aref gui 1)) | |
1737 | (vector 'string ':data text))) | |
1738 | (make-glyph | |
1739 | (list (nth 2 (aref gui 1)) | |
1740 | (vector 'string ':data text))))) | |
1741 | (t | |
1742 | (insert text))))) | |
d543e20b PA |
1743 | |
1744 | (defun widget-gui-action (widget) | |
1745 | "Apply :action for WIDGET." | |
1746 | (widget-apply-action widget (this-command-keys))) | |
1747 | ||
1748 | ;;; The `link' Widget. | |
1749 | ||
25ac13b5 PA |
1750 | (defcustom widget-link-prefix "[" |
1751 | "String used as prefix for links." | |
1752 | :type 'string | |
1753 | :group 'widget-button) | |
1754 | ||
1755 | (defcustom widget-link-suffix "]" | |
1756 | "String used as suffix for links." | |
1757 | :type 'string | |
1758 | :group 'widget-button) | |
1759 | ||
d543e20b PA |
1760 | (define-widget 'link 'item |
1761 | "An embedded link." | |
25ac13b5 PA |
1762 | :button-prefix 'widget-link-prefix |
1763 | :button-suffix 'widget-link-suffix | |
d543e20b | 1764 | :help-echo "Follow the link." |
25ac13b5 | 1765 | :format "%[%t%]") |
d543e20b PA |
1766 | |
1767 | ;;; The `info-link' Widget. | |
1768 | ||
1769 | (define-widget 'info-link 'link | |
1770 | "A link to an info file." | |
1771 | :action 'widget-info-link-action) | |
1772 | ||
1773 | (defun widget-info-link-action (widget &optional event) | |
1774 | "Open the info node specified by WIDGET." | |
a3c88c59 | 1775 | (Info-goto-node (widget-value widget))) |
d543e20b PA |
1776 | |
1777 | ;;; The `url-link' Widget. | |
1778 | ||
1779 | (define-widget 'url-link 'link | |
1780 | "A link to an www page." | |
1781 | :action 'widget-url-link-action) | |
1782 | ||
1783 | (defun widget-url-link-action (widget &optional event) | |
1784 | "Open the url specified by WIDGET." | |
1785 | (require 'browse-url) | |
1786 | (funcall browse-url-browser-function (widget-value widget))) | |
1787 | ||
1788 | ;;; The `editable-field' Widget. | |
1789 | ||
1790 | (define-widget 'editable-field 'default | |
1791 | "An editable text field." | |
a3c88c59 | 1792 | :convert-widget 'widget-value-convert-widget |
d543e20b PA |
1793 | :keymap widget-field-keymap |
1794 | :format "%v" | |
1795 | :value "" | |
a3c88c59 PA |
1796 | :prompt-internal 'widget-field-prompt-internal |
1797 | :prompt-history 'widget-field-history | |
1798 | :prompt-value 'widget-field-prompt-value | |
d543e20b PA |
1799 | :action 'widget-field-action |
1800 | :validate 'widget-field-validate | |
1801 | :valid-regexp "" | |
1802 | :error "No match" | |
1803 | :value-create 'widget-field-value-create | |
1804 | :value-delete 'widget-field-value-delete | |
1805 | :value-get 'widget-field-value-get | |
1806 | :match 'widget-field-match) | |
1807 | ||
a3c88c59 PA |
1808 | (defvar widget-field-history nil |
1809 | "History of field minibuffer edits.") | |
1810 | ||
1811 | (defun widget-field-prompt-internal (widget prompt initial history) | |
1812 | ;; Read string for WIDGET promptinhg with PROMPT. | |
1813 | ;; INITIAL is the initial input and HISTORY is a symbol containing | |
1814 | ;; the earlier input. | |
1815 | (read-string prompt initial history)) | |
1816 | ||
1817 | (defun widget-field-prompt-value (widget prompt value unbound) | |
1818 | ;; Prompt for a string. | |
1819 | (let ((initial (if unbound | |
1820 | nil | |
1821 | (cons (widget-apply widget :value-to-internal | |
1822 | value) 0))) | |
1823 | (history (widget-get widget :prompt-history))) | |
1824 | (let ((answer (widget-apply widget | |
1825 | :prompt-internal prompt initial history))) | |
1826 | (widget-apply widget :value-to-external answer)))) | |
d543e20b | 1827 | |
0b296dac | 1828 | (defvar widget-edit-functions nil) |
211c9fe9 | 1829 | |
d543e20b | 1830 | (defun widget-field-action (widget &optional event) |
f1231b8e RS |
1831 | ;; Move to next field. |
1832 | (widget-forward 1) | |
0b296dac | 1833 | (run-hook-with-args 'widget-edit-functions widget)) |
d543e20b PA |
1834 | |
1835 | (defun widget-field-validate (widget) | |
1836 | ;; Valid if the content matches `:valid-regexp'. | |
1837 | (save-excursion | |
1838 | (let ((value (widget-apply widget :value-get)) | |
1839 | (regexp (widget-get widget :valid-regexp))) | |
1840 | (if (string-match regexp value) | |
1841 | nil | |
1842 | widget)))) | |
1843 | ||
1844 | (defun widget-field-value-create (widget) | |
1845 | ;; Create an editable text field. | |
d543e20b PA |
1846 | (let ((size (widget-get widget :size)) |
1847 | (value (widget-get widget :value)) | |
0a3a0b56 | 1848 | (from (point)) |
c953515e PA |
1849 | ;; This is changed to a real overlay in `widget-setup'. We |
1850 | ;; need the end points to behave differently until | |
1851 | ;; `widget-setup' is called. | |
0a3a0b56 PA |
1852 | (overlay (cons (make-marker) (make-marker)))) |
1853 | (widget-put widget :field-overlay overlay) | |
d543e20b PA |
1854 | (insert value) |
1855 | (and size | |
1856 | (< (length value) size) | |
1857 | (insert-char ?\ (- size (length value)))) | |
1858 | (unless (memq widget widget-field-list) | |
1859 | (setq widget-field-new (cons widget widget-field-new))) | |
0a3a0b56 PA |
1860 | (move-marker (cdr overlay) (point)) |
1861 | (set-marker-insertion-type (cdr overlay) nil) | |
1862 | (when (null size) | |
1863 | (insert ?\n)) | |
1864 | (move-marker (car overlay) from) | |
1865 | (set-marker-insertion-type (car overlay) t))) | |
d543e20b PA |
1866 | |
1867 | (defun widget-field-value-delete (widget) | |
1868 | ;; Remove the widget from the list of active editing fields. | |
1869 | (setq widget-field-list (delq widget widget-field-list)) | |
1870 | ;; These are nil if the :format string doesn't contain `%v'. | |
0a3a0b56 PA |
1871 | (let ((overlay (widget-get widget :field-overlay))) |
1872 | (when overlay | |
1873 | (delete-overlay overlay)))) | |
d543e20b PA |
1874 | |
1875 | (defun widget-field-value-get (widget) | |
1876 | ;; Return current text in editing field. | |
0a3a0b56 PA |
1877 | (let ((from (widget-field-start widget)) |
1878 | (to (widget-field-end widget)) | |
1879 | (buffer (widget-field-buffer widget)) | |
d543e20b PA |
1880 | (size (widget-get widget :size)) |
1881 | (secret (widget-get widget :secret)) | |
1882 | (old (current-buffer))) | |
1883 | (if (and from to) | |
1884 | (progn | |
0a3a0b56 | 1885 | (set-buffer buffer) |
d543e20b PA |
1886 | (while (and size |
1887 | (not (zerop size)) | |
1888 | (> to from) | |
1889 | (eq (char-after (1- to)) ?\ )) | |
1890 | (setq to (1- to))) | |
1891 | (let ((result (buffer-substring-no-properties from to))) | |
1892 | (when secret | |
1893 | (let ((index 0)) | |
1894 | (while (< (+ from index) to) | |
1895 | (aset result index | |
0a3a0b56 | 1896 | (get-char-property (+ from index) 'secret)) |
d543e20b PA |
1897 | (setq index (1+ index))))) |
1898 | (set-buffer old) | |
1899 | result)) | |
1900 | (widget-get widget :value)))) | |
1901 | ||
1902 | (defun widget-field-match (widget value) | |
1903 | ;; Match any string. | |
1904 | (stringp value)) | |
1905 | ||
1906 | ;;; The `text' Widget. | |
1907 | ||
1908 | (define-widget 'text 'editable-field | |
1909 | :keymap widget-text-keymap | |
1910 | "A multiline text area.") | |
1911 | ||
1912 | ;;; The `menu-choice' Widget. | |
1913 | ||
1914 | (define-widget 'menu-choice 'default | |
1915 | "A menu of options." | |
1916 | :convert-widget 'widget-types-convert-widget | |
1917 | :format "%[%t%]: %v" | |
1918 | :case-fold t | |
1919 | :tag "choice" | |
1920 | :void '(item :format "invalid (%t)\n") | |
1921 | :value-create 'widget-choice-value-create | |
1922 | :value-delete 'widget-children-value-delete | |
1923 | :value-get 'widget-choice-value-get | |
1924 | :value-inline 'widget-choice-value-inline | |
a3c88c59 | 1925 | :mouse-down-action 'widget-choice-mouse-down-action |
d543e20b PA |
1926 | :action 'widget-choice-action |
1927 | :error "Make a choice" | |
1928 | :validate 'widget-choice-validate | |
1929 | :match 'widget-choice-match | |
1930 | :match-inline 'widget-choice-match-inline) | |
1931 | ||
1932 | (defun widget-choice-value-create (widget) | |
1933 | ;; Insert the first choice that matches the value. | |
1934 | (let ((value (widget-get widget :value)) | |
1935 | (args (widget-get widget :args)) | |
1936 | current) | |
1937 | (while args | |
1938 | (setq current (car args) | |
1939 | args (cdr args)) | |
1940 | (when (widget-apply current :match value) | |
1941 | (widget-put widget :children (list (widget-create-child-value | |
1942 | widget current value))) | |
1943 | (widget-put widget :choice current) | |
1944 | (setq args nil | |
1945 | current nil))) | |
1946 | (when current | |
1947 | (let ((void (widget-get widget :void))) | |
1948 | (widget-put widget :children (list (widget-create-child-and-convert | |
1949 | widget void :value value))) | |
1950 | (widget-put widget :choice void))))) | |
1951 | ||
1952 | (defun widget-choice-value-get (widget) | |
1953 | ;; Get value of the child widget. | |
1954 | (widget-value (car (widget-get widget :children)))) | |
1955 | ||
1956 | (defun widget-choice-value-inline (widget) | |
1957 | ;; Get value of the child widget. | |
1958 | (widget-apply (car (widget-get widget :children)) :value-inline)) | |
1959 | ||
a3c88c59 PA |
1960 | (defcustom widget-choice-toggle nil |
1961 | "If non-nil, a binary choice will just toggle between the values. | |
1962 | Otherwise, the user will explicitly have to choose between the values | |
25ac13b5 | 1963 | when he invoked the menu." |
a3c88c59 PA |
1964 | :type 'boolean |
1965 | :group 'widgets) | |
1966 | ||
1967 | (defun widget-choice-mouse-down-action (widget &optional event) | |
1968 | ;; Return non-nil if we need a menu. | |
1969 | (let ((args (widget-get widget :args)) | |
1970 | (old (widget-get widget :choice))) | |
1971 | (cond ((not window-system) | |
1972 | ;; No place to pop up a menu. | |
1973 | nil) | |
1974 | ((not (or (fboundp 'x-popup-menu) (fboundp 'popup-menu))) | |
1975 | ;; No way to pop up a menu. | |
1976 | nil) | |
1977 | ((< (length args) 2) | |
1978 | ;; Empty or singleton list, just return the value. | |
1979 | nil) | |
1980 | ((> (length args) widget-menu-max-size) | |
1981 | ;; Too long, prompt. | |
1982 | nil) | |
1983 | ((> (length args) 2) | |
1984 | ;; Reasonable sized list, use menu. | |
1985 | t) | |
1986 | ((and widget-choice-toggle (memq old args)) | |
1987 | ;; We toggle. | |
1988 | nil) | |
1989 | (t | |
1990 | ;; Ask which of the two. | |
1991 | t)))) | |
1992 | ||
d543e20b PA |
1993 | (defun widget-choice-action (widget &optional event) |
1994 | ;; Make a choice. | |
1995 | (let ((args (widget-get widget :args)) | |
1996 | (old (widget-get widget :choice)) | |
1997 | (tag (widget-apply widget :menu-tag-get)) | |
1998 | (completion-ignore-case (widget-get widget :case-fold)) | |
1999 | current choices) | |
2000 | ;; Remember old value. | |
2001 | (if (and old (not (widget-apply widget :validate))) | |
2002 | (let* ((external (widget-value widget)) | |
2003 | (internal (widget-apply old :value-to-internal external))) | |
2004 | (widget-put old :value internal))) | |
2005 | ;; Find new choice. | |
2006 | (setq current | |
2007 | (cond ((= (length args) 0) | |
2008 | nil) | |
2009 | ((= (length args) 1) | |
2010 | (nth 0 args)) | |
a3c88c59 PA |
2011 | ((and widget-choice-toggle |
2012 | (= (length args) 2) | |
d543e20b PA |
2013 | (memq old args)) |
2014 | (if (eq old (nth 0 args)) | |
2015 | (nth 1 args) | |
2016 | (nth 0 args))) | |
2017 | (t | |
2018 | (while args | |
2019 | (setq current (car args) | |
2020 | args (cdr args)) | |
2021 | (setq choices | |
2022 | (cons (cons (widget-apply current :menu-tag-get) | |
2023 | current) | |
2024 | choices))) | |
2025 | (widget-choose tag (reverse choices) event)))) | |
d0acc4ea RS |
2026 | (when current |
2027 | (widget-value-set widget | |
2028 | (widget-apply current :value-to-external | |
2029 | (widget-get current :value))) | |
2030 | (widget-setup) | |
2031 | (widget-apply widget :notify widget event))) | |
d4b8422f | 2032 | (run-hook-with-args 'widget-edit-functions widget)) |
d543e20b PA |
2033 | |
2034 | (defun widget-choice-validate (widget) | |
2035 | ;; Valid if we have made a valid choice. | |
2036 | (let ((void (widget-get widget :void)) | |
2037 | (choice (widget-get widget :choice)) | |
2038 | (child (car (widget-get widget :children)))) | |
2039 | (if (eq void choice) | |
2040 | widget | |
2041 | (widget-apply child :validate)))) | |
2042 | ||
2043 | (defun widget-choice-match (widget value) | |
2044 | ;; Matches if one of the choices matches. | |
2045 | (let ((args (widget-get widget :args)) | |
2046 | current found) | |
2047 | (while (and args (not found)) | |
2048 | (setq current (car args) | |
2049 | args (cdr args) | |
2050 | found (widget-apply current :match value))) | |
2051 | found)) | |
2052 | ||
2053 | (defun widget-choice-match-inline (widget values) | |
2054 | ;; Matches if one of the choices matches. | |
2055 | (let ((args (widget-get widget :args)) | |
2056 | current found) | |
2057 | (while (and args (null found)) | |
2058 | (setq current (car args) | |
2059 | args (cdr args) | |
2060 | found (widget-match-inline current values))) | |
2061 | found)) | |
2062 | ||
2063 | ;;; The `toggle' Widget. | |
2064 | ||
2065 | (define-widget 'toggle 'item | |
2066 | "Toggle between two states." | |
2067 | :format "%[%v%]\n" | |
2068 | :value-create 'widget-toggle-value-create | |
2069 | :action 'widget-toggle-action | |
2070 | :match (lambda (widget value) t) | |
2071 | :on "on" | |
2072 | :off "off") | |
2073 | ||
2074 | (defun widget-toggle-value-create (widget) | |
2075 | ;; Insert text representing the `on' and `off' states. | |
2076 | (if (widget-value widget) | |
2077 | (widget-glyph-insert widget | |
2078 | (widget-get widget :on) | |
2079 | (widget-get widget :on-glyph)) | |
2080 | (widget-glyph-insert widget | |
2081 | (widget-get widget :off) | |
2082 | (widget-get widget :off-glyph)))) | |
2083 | ||
2084 | (defun widget-toggle-action (widget &optional event) | |
2085 | ;; Toggle value. | |
d0acc4ea RS |
2086 | (widget-value-set widget (not (widget-value widget))) |
2087 | (widget-apply widget :notify widget event) | |
d4b8422f | 2088 | (run-hook-with-args 'widget-edit-functions widget)) |
6d528fc5 | 2089 | |
d543e20b PA |
2090 | ;;; The `checkbox' Widget. |
2091 | ||
2092 | (define-widget 'checkbox 'toggle | |
2093 | "A checkbox toggle." | |
25ac13b5 PA |
2094 | :button-suffix "" |
2095 | :button-prefix "" | |
d543e20b PA |
2096 | :format "%[%v%]" |
2097 | :on "[X]" | |
2098 | :on-glyph "check1" | |
2099 | :off "[ ]" | |
2100 | :off-glyph "check0" | |
2101 | :action 'widget-checkbox-action) | |
2102 | ||
2103 | (defun widget-checkbox-action (widget &optional event) | |
2104 | "Toggle checkbox, notify parent, and set active state of sibling." | |
2105 | (widget-toggle-action widget event) | |
2106 | (let ((sibling (widget-get-sibling widget))) | |
2107 | (when sibling | |
2108 | (if (widget-value widget) | |
2109 | (widget-apply sibling :activate) | |
2110 | (widget-apply sibling :deactivate))))) | |
2111 | ||
2112 | ;;; The `checklist' Widget. | |
2113 | ||
2114 | (define-widget 'checklist 'default | |
2115 | "A multiple choice widget." | |
2116 | :convert-widget 'widget-types-convert-widget | |
2117 | :format "%v" | |
2118 | :offset 4 | |
2119 | :entry-format "%b %v" | |
2120 | :menu-tag "checklist" | |
2121 | :greedy nil | |
2122 | :value-create 'widget-checklist-value-create | |
2123 | :value-delete 'widget-children-value-delete | |
2124 | :value-get 'widget-checklist-value-get | |
2125 | :validate 'widget-checklist-validate | |
2126 | :match 'widget-checklist-match | |
2127 | :match-inline 'widget-checklist-match-inline) | |
2128 | ||
2129 | (defun widget-checklist-value-create (widget) | |
2130 | ;; Insert all values | |
2131 | (let ((alist (widget-checklist-match-find widget (widget-get widget :value))) | |
2132 | (args (widget-get widget :args))) | |
2133 | (while args | |
2134 | (widget-checklist-add-item widget (car args) (assq (car args) alist)) | |
2135 | (setq args (cdr args))) | |
2136 | (widget-put widget :children (nreverse (widget-get widget :children))))) | |
2137 | ||
2138 | (defun widget-checklist-add-item (widget type chosen) | |
2139 | ;; Create checklist item in WIDGET of type TYPE. | |
2140 | ;; If the item is checked, CHOSEN is a cons whose cdr is the value. | |
2141 | (and (eq (preceding-char) ?\n) | |
2142 | (widget-get widget :indent) | |
2143 | (insert-char ? (widget-get widget :indent))) | |
2144 | (widget-specify-insert | |
2145 | (let* ((children (widget-get widget :children)) | |
2146 | (buttons (widget-get widget :buttons)) | |
2147 | (button-args (or (widget-get type :sibling-args) | |
2148 | (widget-get widget :button-args))) | |
2149 | (from (point)) | |
2150 | child button) | |
2151 | (insert (widget-get widget :entry-format)) | |
2152 | (goto-char from) | |
2153 | ;; Parse % escapes in format. | |
2154 | (while (re-search-forward "%\\([bv%]\\)" nil t) | |
2155 | (let ((escape (aref (match-string 1) 0))) | |
2156 | (replace-match "" t t) | |
2157 | (cond ((eq escape ?%) | |
2158 | (insert "%")) | |
2159 | ((eq escape ?b) | |
2160 | (setq button (apply 'widget-create-child-and-convert | |
2161 | widget 'checkbox | |
2162 | :value (not (null chosen)) | |
2163 | button-args))) | |
2164 | ((eq escape ?v) | |
2165 | (setq child | |
2166 | (cond ((not chosen) | |
2167 | (let ((child (widget-create-child widget type))) | |
2168 | (widget-apply child :deactivate) | |
2169 | child)) | |
2170 | ((widget-get type :inline) | |
2171 | (widget-create-child-value | |
2172 | widget type (cdr chosen))) | |
2173 | (t | |
2174 | (widget-create-child-value | |
2175 | widget type (car (cdr chosen))))))) | |
2176 | (t | |
2177 | (error "Unknown escape `%c'" escape))))) | |
2178 | ;; Update properties. | |
2179 | (and button child (widget-put child :button button)) | |
2180 | (and button (widget-put widget :buttons (cons button buttons))) | |
2181 | (and child (widget-put widget :children (cons child children)))))) | |
2182 | ||
2183 | (defun widget-checklist-match (widget values) | |
2184 | ;; All values must match a type in the checklist. | |
2185 | (and (listp values) | |
2186 | (null (cdr (widget-checklist-match-inline widget values))))) | |
2187 | ||
2188 | (defun widget-checklist-match-inline (widget values) | |
2189 | ;; Find the values which match a type in the checklist. | |
2190 | (let ((greedy (widget-get widget :greedy)) | |
ef3f635f | 2191 | (args (copy-sequence (widget-get widget :args))) |
d543e20b PA |
2192 | found rest) |
2193 | (while values | |
2194 | (let ((answer (widget-checklist-match-up args values))) | |
2195 | (cond (answer | |
2196 | (let ((vals (widget-match-inline answer values))) | |
2197 | (setq found (append found (car vals)) | |
2198 | values (cdr vals) | |
2199 | args (delq answer args)))) | |
2200 | (greedy | |
2201 | (setq rest (append rest (list (car values))) | |
2202 | values (cdr values))) | |
2203 | (t | |
2204 | (setq rest (append rest values) | |
2205 | values nil))))) | |
2206 | (cons found rest))) | |
2207 | ||
2208 | (defun widget-checklist-match-find (widget vals) | |
2209 | ;; Find the vals which match a type in the checklist. | |
2210 | ;; Return an alist of (TYPE MATCH). | |
2211 | (let ((greedy (widget-get widget :greedy)) | |
ef3f635f | 2212 | (args (copy-sequence (widget-get widget :args))) |
d543e20b PA |
2213 | found) |
2214 | (while vals | |
2215 | (let ((answer (widget-checklist-match-up args vals))) | |
2216 | (cond (answer | |
2217 | (let ((match (widget-match-inline answer vals))) | |
2218 | (setq found (cons (cons answer (car match)) found) | |
2219 | vals (cdr match) | |
2220 | args (delq answer args)))) | |
2221 | (greedy | |
2222 | (setq vals (cdr vals))) | |
2223 | (t | |
2224 | (setq vals nil))))) | |
2225 | found)) | |
2226 | ||
2227 | (defun widget-checklist-match-up (args vals) | |
2228 | ;; Rerturn the first type from ARGS that matches VALS. | |
2229 | (let (current found) | |
2230 | (while (and args (null found)) | |
2231 | (setq current (car args) | |
2232 | args (cdr args) | |
2233 | found (widget-match-inline current vals))) | |
2234 | (if found | |
2235 | current | |
2236 | nil))) | |
2237 | ||
2238 | (defun widget-checklist-value-get (widget) | |
2239 | ;; The values of all selected items. | |
2240 | (let ((children (widget-get widget :children)) | |
2241 | child result) | |
2242 | (while children | |
2243 | (setq child (car children) | |
2244 | children (cdr children)) | |
2245 | (if (widget-value (widget-get child :button)) | |
2246 | (setq result (append result (widget-apply child :value-inline))))) | |
2247 | result)) | |
2248 | ||
2249 | (defun widget-checklist-validate (widget) | |
2250 | ;; Ticked chilren must be valid. | |
2251 | (let ((children (widget-get widget :children)) | |
2252 | child button found) | |
2253 | (while (and children (not found)) | |
2254 | (setq child (car children) | |
2255 | children (cdr children) | |
2256 | button (widget-get child :button) | |
2257 | found (and (widget-value button) | |
2258 | (widget-apply child :validate)))) | |
2259 | found)) | |
2260 | ||
2261 | ;;; The `option' Widget | |
2262 | ||
2263 | (define-widget 'option 'checklist | |
2264 | "An widget with an optional item." | |
2265 | :inline t) | |
2266 | ||
2267 | ;;; The `choice-item' Widget. | |
2268 | ||
2269 | (define-widget 'choice-item 'item | |
2270 | "Button items that delegate action events to their parents." | |
a3c88c59 | 2271 | :action 'widget-parent-action |
d543e20b PA |
2272 | :format "%[%t%] \n") |
2273 | ||
d543e20b PA |
2274 | ;;; The `radio-button' Widget. |
2275 | ||
2276 | (define-widget 'radio-button 'toggle | |
2277 | "A radio button for use in the `radio' widget." | |
2278 | :notify 'widget-radio-button-notify | |
2279 | :format "%[%v%]" | |
25ac13b5 PA |
2280 | :button-suffix "" |
2281 | :button-prefix "" | |
d543e20b PA |
2282 | :on "(*)" |
2283 | :on-glyph "radio1" | |
2284 | :off "( )" | |
2285 | :off-glyph "radio0") | |
2286 | ||
2287 | (defun widget-radio-button-notify (widget child &optional event) | |
2288 | ;; Tell daddy. | |
2289 | (widget-apply (widget-get widget :parent) :action widget event)) | |
2290 | ||
2291 | ;;; The `radio-button-choice' Widget. | |
2292 | ||
2293 | (define-widget 'radio-button-choice 'default | |
2294 | "Select one of multiple options." | |
2295 | :convert-widget 'widget-types-convert-widget | |
2296 | :offset 4 | |
2297 | :format "%v" | |
2298 | :entry-format "%b %v" | |
2299 | :menu-tag "radio" | |
2300 | :value-create 'widget-radio-value-create | |
2301 | :value-delete 'widget-children-value-delete | |
2302 | :value-get 'widget-radio-value-get | |
2303 | :value-inline 'widget-radio-value-inline | |
2304 | :value-set 'widget-radio-value-set | |
2305 | :error "You must push one of the buttons" | |
2306 | :validate 'widget-radio-validate | |
2307 | :match 'widget-choice-match | |
2308 | :match-inline 'widget-choice-match-inline | |
2309 | :action 'widget-radio-action) | |
2310 | ||
2311 | (defun widget-radio-value-create (widget) | |
2312 | ;; Insert all values | |
2313 | (let ((args (widget-get widget :args)) | |
2314 | arg) | |
2315 | (while args | |
2316 | (setq arg (car args) | |
2317 | args (cdr args)) | |
2318 | (widget-radio-add-item widget arg)))) | |
2319 | ||
2320 | (defun widget-radio-add-item (widget type) | |
2321 | "Add to radio widget WIDGET a new radio button item of type TYPE." | |
2322 | ;; (setq type (widget-convert type)) | |
2323 | (and (eq (preceding-char) ?\n) | |
2324 | (widget-get widget :indent) | |
2325 | (insert-char ? (widget-get widget :indent))) | |
2326 | (widget-specify-insert | |
2327 | (let* ((value (widget-get widget :value)) | |
2328 | (children (widget-get widget :children)) | |
2329 | (buttons (widget-get widget :buttons)) | |
2330 | (button-args (or (widget-get type :sibling-args) | |
2331 | (widget-get widget :button-args))) | |
2332 | (from (point)) | |
2333 | (chosen (and (null (widget-get widget :choice)) | |
2334 | (widget-apply type :match value))) | |
2335 | child button) | |
2336 | (insert (widget-get widget :entry-format)) | |
2337 | (goto-char from) | |
2338 | ;; Parse % escapes in format. | |
2339 | (while (re-search-forward "%\\([bv%]\\)" nil t) | |
2340 | (let ((escape (aref (match-string 1) 0))) | |
2341 | (replace-match "" t t) | |
2342 | (cond ((eq escape ?%) | |
2343 | (insert "%")) | |
2344 | ((eq escape ?b) | |
2345 | (setq button (apply 'widget-create-child-and-convert | |
2346 | widget 'radio-button | |
2347 | :value (not (null chosen)) | |
2348 | button-args))) | |
2349 | ((eq escape ?v) | |
2350 | (setq child (if chosen | |
2351 | (widget-create-child-value | |
2352 | widget type value) | |
2353 | (widget-create-child widget type))) | |
2354 | (unless chosen | |
2355 | (widget-apply child :deactivate))) | |
2356 | (t | |
2357 | (error "Unknown escape `%c'" escape))))) | |
2358 | ;; Update properties. | |
2359 | (when chosen | |
2360 | (widget-put widget :choice type)) | |
2361 | (when button | |
2362 | (widget-put child :button button) | |
2363 | (widget-put widget :buttons (nconc buttons (list button)))) | |
2364 | (when child | |
2365 | (widget-put widget :children (nconc children (list child)))) | |
2366 | child))) | |
2367 | ||
2368 | (defun widget-radio-value-get (widget) | |
2369 | ;; Get value of the child widget. | |
2370 | (let ((chosen (widget-radio-chosen widget))) | |
2371 | (and chosen (widget-value chosen)))) | |
2372 | ||
2373 | (defun widget-radio-chosen (widget) | |
2374 | "Return the widget representing the chosen radio button." | |
2375 | (let ((children (widget-get widget :children)) | |
2376 | current found) | |
2377 | (while children | |
2378 | (setq current (car children) | |
2379 | children (cdr children)) | |
2380 | (let* ((button (widget-get current :button)) | |
2381 | (value (widget-apply button :value-get))) | |
2382 | (when value | |
2383 | (setq found current | |
2384 | children nil)))) | |
2385 | found)) | |
2386 | ||
2387 | (defun widget-radio-value-inline (widget) | |
2388 | ;; Get value of the child widget. | |
2389 | (let ((children (widget-get widget :children)) | |
2390 | current found) | |
2391 | (while children | |
2392 | (setq current (car children) | |
2393 | children (cdr children)) | |
2394 | (let* ((button (widget-get current :button)) | |
2395 | (value (widget-apply button :value-get))) | |
2396 | (when value | |
2397 | (setq found (widget-apply current :value-inline) | |
2398 | children nil)))) | |
2399 | found)) | |
2400 | ||
2401 | (defun widget-radio-value-set (widget value) | |
2402 | ;; We can't just delete and recreate a radio widget, since children | |
2403 | ;; can be added after the original creation and won't be recreated | |
2404 | ;; by `:create'. | |
2405 | (let ((children (widget-get widget :children)) | |
2406 | current found) | |
2407 | (while children | |
2408 | (setq current (car children) | |
2409 | children (cdr children)) | |
2410 | (let* ((button (widget-get current :button)) | |
2411 | (match (and (not found) | |
2412 | (widget-apply current :match value)))) | |
2413 | (widget-value-set button match) | |
2414 | (if match | |
2415 | (progn | |
2416 | (widget-value-set current value) | |
2417 | (widget-apply current :activate)) | |
2418 | (widget-apply current :deactivate)) | |
2419 | (setq found (or found match)))))) | |
2420 | ||
2421 | (defun widget-radio-validate (widget) | |
2422 | ;; Valid if we have made a valid choice. | |
2423 | (let ((children (widget-get widget :children)) | |
2424 | current found button) | |
2425 | (while (and children (not found)) | |
2426 | (setq current (car children) | |
2427 | children (cdr children) | |
2428 | button (widget-get current :button) | |
2429 | found (widget-apply button :value-get))) | |
2430 | (if found | |
2431 | (widget-apply current :validate) | |
2432 | widget))) | |
2433 | ||
2434 | (defun widget-radio-action (widget child event) | |
2435 | ;; Check if a radio button was pressed. | |
2436 | (let ((children (widget-get widget :children)) | |
2437 | (buttons (widget-get widget :buttons)) | |
2438 | current) | |
2439 | (when (memq child buttons) | |
2440 | (while children | |
2441 | (setq current (car children) | |
2442 | children (cdr children)) | |
2443 | (let* ((button (widget-get current :button))) | |
2444 | (cond ((eq child button) | |
2445 | (widget-value-set button t) | |
2446 | (widget-apply current :activate)) | |
2447 | ((widget-value button) | |
2448 | (widget-value-set button nil) | |
2449 | (widget-apply current :deactivate))))))) | |
2450 | ;; Pass notification to parent. | |
2451 | (widget-apply widget :notify child event)) | |
2452 | ||
2453 | ;;; The `insert-button' Widget. | |
2454 | ||
2455 | (define-widget 'insert-button 'push-button | |
2456 | "An insert button for the `editable-list' widget." | |
2457 | :tag "INS" | |
2458 | :help-echo "Insert a new item into the list at this position." | |
2459 | :action 'widget-insert-button-action) | |
2460 | ||
2461 | (defun widget-insert-button-action (widget &optional event) | |
2462 | ;; Ask the parent to insert a new item. | |
2463 | (widget-apply (widget-get widget :parent) | |
2464 | :insert-before (widget-get widget :widget))) | |
2465 | ||
2466 | ;;; The `delete-button' Widget. | |
2467 | ||
2468 | (define-widget 'delete-button 'push-button | |
2469 | "A delete button for the `editable-list' widget." | |
2470 | :tag "DEL" | |
2471 | :help-echo "Delete this item from the list." | |
2472 | :action 'widget-delete-button-action) | |
2473 | ||
2474 | (defun widget-delete-button-action (widget &optional event) | |
2475 | ;; Ask the parent to insert a new item. | |
2476 | (widget-apply (widget-get widget :parent) | |
2477 | :delete-at (widget-get widget :widget))) | |
2478 | ||
2479 | ;;; The `editable-list' Widget. | |
2480 | ||
2481 | (defcustom widget-editable-list-gui nil | |
2482 | "If non nil, use GUI push-buttons in editable list when available." | |
2483 | :type 'boolean | |
2484 | :group 'widgets) | |
2485 | ||
2486 | (define-widget 'editable-list 'default | |
2487 | "A variable list of widgets of the same type." | |
2488 | :convert-widget 'widget-types-convert-widget | |
2489 | :offset 12 | |
2490 | :format "%v%i\n" | |
2491 | :format-handler 'widget-editable-list-format-handler | |
2492 | :entry-format "%i %d %v" | |
2493 | :menu-tag "editable-list" | |
2494 | :value-create 'widget-editable-list-value-create | |
2495 | :value-delete 'widget-children-value-delete | |
2496 | :value-get 'widget-editable-list-value-get | |
a3c88c59 | 2497 | :validate 'widget-children-validate |
d543e20b PA |
2498 | :match 'widget-editable-list-match |
2499 | :match-inline 'widget-editable-list-match-inline | |
2500 | :insert-before 'widget-editable-list-insert-before | |
2501 | :delete-at 'widget-editable-list-delete-at) | |
2502 | ||
2503 | (defun widget-editable-list-format-handler (widget escape) | |
2504 | ;; We recognize the insert button. | |
2505 | (let ((widget-push-button-gui widget-editable-list-gui)) | |
2506 | (cond ((eq escape ?i) | |
2507 | (and (widget-get widget :indent) | |
2508 | (insert-char ? (widget-get widget :indent))) | |
2509 | (apply 'widget-create-child-and-convert | |
2510 | widget 'insert-button | |
2511 | (widget-get widget :append-button-args))) | |
2512 | (t | |
2513 | (widget-default-format-handler widget escape))))) | |
2514 | ||
2515 | (defun widget-editable-list-value-create (widget) | |
2516 | ;; Insert all values | |
2517 | (let* ((value (widget-get widget :value)) | |
2518 | (type (nth 0 (widget-get widget :args))) | |
2519 | (inlinep (widget-get type :inline)) | |
2520 | children) | |
2521 | (widget-put widget :value-pos (copy-marker (point))) | |
2522 | (set-marker-insertion-type (widget-get widget :value-pos) t) | |
2523 | (while value | |
2524 | (let ((answer (widget-match-inline type value))) | |
2525 | (if answer | |
2526 | (setq children (cons (widget-editable-list-entry-create | |
2527 | widget | |
2528 | (if inlinep | |
2529 | (car answer) | |
2530 | (car (car answer))) | |
2531 | t) | |
2532 | children) | |
2533 | value (cdr answer)) | |
2534 | (setq value nil)))) | |
2535 | (widget-put widget :children (nreverse children)))) | |
2536 | ||
2537 | (defun widget-editable-list-value-get (widget) | |
2538 | ;; Get value of the child widget. | |
2539 | (apply 'append (mapcar (lambda (child) (widget-apply child :value-inline)) | |
2540 | (widget-get widget :children)))) | |
2541 | ||
d543e20b PA |
2542 | (defun widget-editable-list-match (widget value) |
2543 | ;; Value must be a list and all the members must match the type. | |
2544 | (and (listp value) | |
2545 | (null (cdr (widget-editable-list-match-inline widget value))))) | |
2546 | ||
2547 | (defun widget-editable-list-match-inline (widget value) | |
2548 | (let ((type (nth 0 (widget-get widget :args))) | |
2549 | (ok t) | |
2550 | found) | |
2551 | (while (and value ok) | |
2552 | (let ((answer (widget-match-inline type value))) | |
2553 | (if answer | |
2554 | (setq found (append found (car answer)) | |
2555 | value (cdr answer)) | |
2556 | (setq ok nil)))) | |
2557 | (cons found value))) | |
2558 | ||
2559 | (defun widget-editable-list-insert-before (widget before) | |
2560 | ;; Insert a new child in the list of children. | |
2561 | (save-excursion | |
2562 | (let ((children (widget-get widget :children)) | |
2563 | (inhibit-read-only t) | |
c6753d66 | 2564 | before-change-functions |
d543e20b PA |
2565 | after-change-functions) |
2566 | (cond (before | |
2567 | (goto-char (widget-get before :entry-from))) | |
2568 | (t | |
2569 | (goto-char (widget-get widget :value-pos)))) | |
2570 | (let ((child (widget-editable-list-entry-create | |
2571 | widget nil nil))) | |
2572 | (when (< (widget-get child :entry-from) (widget-get widget :from)) | |
2573 | (set-marker (widget-get widget :from) | |
2574 | (widget-get child :entry-from))) | |
2575 | (widget-specify-text (widget-get child :entry-from) | |
2576 | (widget-get child :entry-to)) | |
2577 | (if (eq (car children) before) | |
2578 | (widget-put widget :children (cons child children)) | |
2579 | (while (not (eq (car (cdr children)) before)) | |
2580 | (setq children (cdr children))) | |
2581 | (setcdr children (cons child (cdr children))))))) | |
2582 | (widget-setup) | |
0a3a0b56 | 2583 | (widget-apply widget :notify widget)) |
d543e20b PA |
2584 | |
2585 | (defun widget-editable-list-delete-at (widget child) | |
2586 | ;; Delete child from list of children. | |
2587 | (save-excursion | |
ef3f635f | 2588 | (let ((buttons (copy-sequence (widget-get widget :buttons))) |
d543e20b PA |
2589 | button |
2590 | (inhibit-read-only t) | |
c6753d66 | 2591 | before-change-functions |
d543e20b PA |
2592 | after-change-functions) |
2593 | (while buttons | |
2594 | (setq button (car buttons) | |
2595 | buttons (cdr buttons)) | |
2596 | (when (eq (widget-get button :widget) child) | |
2597 | (widget-put widget | |
2598 | :buttons (delq button (widget-get widget :buttons))) | |
2599 | (widget-delete button)))) | |
2600 | (let ((entry-from (widget-get child :entry-from)) | |
2601 | (entry-to (widget-get child :entry-to)) | |
2602 | (inhibit-read-only t) | |
c6753d66 | 2603 | before-change-functions |
d543e20b PA |
2604 | after-change-functions) |
2605 | (widget-delete child) | |
2606 | (delete-region entry-from entry-to) | |
2607 | (set-marker entry-from nil) | |
2608 | (set-marker entry-to nil)) | |
2609 | (widget-put widget :children (delq child (widget-get widget :children)))) | |
2610 | (widget-setup) | |
2611 | (widget-apply widget :notify widget)) | |
2612 | ||
2613 | (defun widget-editable-list-entry-create (widget value conv) | |
2614 | ;; Create a new entry to the list. | |
2615 | (let ((type (nth 0 (widget-get widget :args))) | |
2616 | (widget-push-button-gui widget-editable-list-gui) | |
2617 | child delete insert) | |
2618 | (widget-specify-insert | |
2619 | (save-excursion | |
2620 | (and (widget-get widget :indent) | |
2621 | (insert-char ? (widget-get widget :indent))) | |
2622 | (insert (widget-get widget :entry-format))) | |
2623 | ;; Parse % escapes in format. | |
2624 | (while (re-search-forward "%\\(.\\)" nil t) | |
2625 | (let ((escape (aref (match-string 1) 0))) | |
2626 | (replace-match "" t t) | |
2627 | (cond ((eq escape ?%) | |
2628 | (insert "%")) | |
2629 | ((eq escape ?i) | |
2630 | (setq insert (apply 'widget-create-child-and-convert | |
2631 | widget 'insert-button | |
2632 | (widget-get widget :insert-button-args)))) | |
2633 | ((eq escape ?d) | |
2634 | (setq delete (apply 'widget-create-child-and-convert | |
2635 | widget 'delete-button | |
2636 | (widget-get widget :delete-button-args)))) | |
2637 | ((eq escape ?v) | |
2638 | (if conv | |
2639 | (setq child (widget-create-child-value | |
2640 | widget type value)) | |
2641 | (setq child (widget-create-child widget type)))) | |
2642 | (t | |
2643 | (error "Unknown escape `%c'" escape))))) | |
2644 | (widget-put widget | |
2645 | :buttons (cons delete | |
2646 | (cons insert | |
2647 | (widget-get widget :buttons)))) | |
2648 | (let ((entry-from (copy-marker (point-min))) | |
2649 | (entry-to (copy-marker (point-max)))) | |
2650 | (widget-specify-text entry-from entry-to) | |
2651 | (set-marker-insertion-type entry-from t) | |
2652 | (set-marker-insertion-type entry-to nil) | |
2653 | (widget-put child :entry-from entry-from) | |
2654 | (widget-put child :entry-to entry-to))) | |
2655 | (widget-put insert :widget child) | |
2656 | (widget-put delete :widget child) | |
2657 | child)) | |
2658 | ||
2659 | ;;; The `group' Widget. | |
2660 | ||
2661 | (define-widget 'group 'default | |
2662 | "A widget which group other widgets inside." | |
2663 | :convert-widget 'widget-types-convert-widget | |
2664 | :format "%v" | |
2665 | :value-create 'widget-group-value-create | |
2666 | :value-delete 'widget-children-value-delete | |
2667 | :value-get 'widget-editable-list-value-get | |
a3c88c59 | 2668 | :validate 'widget-children-validate |
d543e20b PA |
2669 | :match 'widget-group-match |
2670 | :match-inline 'widget-group-match-inline) | |
2671 | ||
2672 | (defun widget-group-value-create (widget) | |
2673 | ;; Create each component. | |
2674 | (let ((args (widget-get widget :args)) | |
2675 | (value (widget-get widget :value)) | |
2676 | arg answer children) | |
2677 | (while args | |
2678 | (setq arg (car args) | |
2679 | args (cdr args) | |
2680 | answer (widget-match-inline arg value) | |
2681 | value (cdr answer)) | |
2682 | (and (eq (preceding-char) ?\n) | |
2683 | (widget-get widget :indent) | |
2684 | (insert-char ? (widget-get widget :indent))) | |
3acab5ef PA |
2685 | (push (cond ((null answer) |
2686 | (widget-create-child widget arg)) | |
2687 | ((widget-get arg :inline) | |
2688 | (widget-create-child-value widget arg (car answer))) | |
2689 | (t | |
2690 | (widget-create-child-value widget arg (car (car answer))))) | |
2691 | children)) | |
d543e20b PA |
2692 | (widget-put widget :children (nreverse children)))) |
2693 | ||
2694 | (defun widget-group-match (widget values) | |
2695 | ;; Match if the components match. | |
2696 | (and (listp values) | |
2697 | (let ((match (widget-group-match-inline widget values))) | |
2698 | (and match (null (cdr match)))))) | |
2699 | ||
2700 | (defun widget-group-match-inline (widget vals) | |
2701 | ;; Match if the components match. | |
2702 | (let ((args (widget-get widget :args)) | |
2703 | argument answer found) | |
2704 | (while args | |
2705 | (setq argument (car args) | |
2706 | args (cdr args) | |
2707 | answer (widget-match-inline argument vals)) | |
2708 | (if answer | |
2709 | (setq vals (cdr answer) | |
2710 | found (append found (car answer))) | |
2711 | (setq vals nil | |
2712 | args nil))) | |
2713 | (if answer | |
2714 | (cons found vals) | |
2715 | nil))) | |
2716 | ||
3acab5ef | 2717 | ;;; The `visibility' Widget. |
d543e20b | 2718 | |
3acab5ef PA |
2719 | (define-widget 'visibility 'item |
2720 | "An indicator and manipulator for hidden items." | |
2721 | :format "%[%v%]" | |
2722 | :button-prefix "" | |
2723 | :button-suffix "" | |
c6753d66 RS |
2724 | :on "Hide" |
2725 | :off "Show" | |
3acab5ef PA |
2726 | :value-create 'widget-visibility-value-create |
2727 | :action 'widget-toggle-action | |
2728 | :match (lambda (widget value) t)) | |
d543e20b | 2729 | |
3acab5ef PA |
2730 | (defun widget-visibility-value-create (widget) |
2731 | ;; Insert text representing the `on' and `off' states. | |
2732 | (let ((on (widget-get widget :on)) | |
2733 | (off (widget-get widget :off))) | |
2734 | (if on | |
2735 | (setq on (concat widget-push-button-prefix | |
2736 | on | |
2737 | widget-push-button-suffix)) | |
2738 | (setq on "")) | |
2739 | (if off | |
2740 | (setq off (concat widget-push-button-prefix | |
c6753d66 RS |
2741 | off |
2742 | widget-push-button-suffix)) | |
3acab5ef PA |
2743 | (setq off "")) |
2744 | (if (widget-value widget) | |
2745 | (widget-glyph-insert widget on "down" "down-pushed") | |
c6753d66 RS |
2746 | (widget-glyph-insert widget off "right" "right-pushed")))) |
2747 | ||
8697863a PA |
2748 | ;;; The `documentation-link' Widget. |
2749 | ;; | |
2750 | ;; This is a helper widget for `documentation-string'. | |
3acab5ef | 2751 | |
8697863a PA |
2752 | (define-widget 'documentation-link 'link |
2753 | "Link type used in documentation strings." | |
2754 | :tab-order -1 | |
2755 | :help-echo 'widget-documentation-link-echo-help | |
2756 | :action 'widget-documentation-link-action) | |
2757 | ||
2758 | (defun widget-documentation-link-echo-help (widget) | |
2759 | "Tell what this link will describe." | |
2760 | (concat "Describe the `" (widget-get widget :value) "' symbol.")) | |
2761 | ||
2762 | (defun widget-documentation-link-action (widget &optional event) | |
f9923499 | 2763 | "Display documentation for WIDGET's value. Ignore optional argument EVENT." |
9dccd7ef RS |
2764 | (let* ((string (widget-get widget :value)) |
2765 | (symbol (intern string))) | |
2766 | (if (and (fboundp symbol) (boundp symbol)) | |
f9923499 | 2767 | ;; If there are two doc strings, give the user a way to pick one. |
9dccd7ef RS |
2768 | (apropos (concat "\\`" (regexp-quote string) "\\'")) |
2769 | (if (fboundp symbol) | |
2770 | (describe-function symbol) | |
2771 | (describe-variable symbol))))) | |
8697863a PA |
2772 | |
2773 | (defcustom widget-documentation-links t | |
2774 | "Add hyperlinks to documentation strings when non-nil." | |
2775 | :type 'boolean | |
2776 | :group 'widget-documentation) | |
2777 | ||
2778 | (defcustom widget-documentation-link-regexp "`\\([^\n`' ]+\\)'" | |
2779 | "Regexp for matching potential links in documentation strings. | |
2780 | The first group should be the link itself." | |
2781 | :type 'regexp | |
2782 | :group 'widget-documentation) | |
2783 | ||
2784 | (defcustom widget-documentation-link-p 'intern-soft | |
2785 | "Predicate used to test if a string is useful as a link. | |
2786 | The value should be a function. The function will be called one | |
2787 | argument, a string, and should return non-nil if there should be a | |
2788 | link for that string." | |
2789 | :type 'function | |
2790 | :options '(widget-documentation-link-p) | |
2791 | :group 'widget-documentation) | |
2792 | ||
2793 | (defcustom widget-documentation-link-type 'documentation-link | |
2794 | "Widget type used for links in documentation strings." | |
2795 | :type 'symbol | |
2796 | :group 'widget-documentation) | |
2797 | ||
2798 | (defun widget-documentation-link-add (widget from to) | |
2799 | (widget-specify-doc widget from to) | |
2800 | (when widget-documentation-links | |
2801 | (let ((regexp widget-documentation-link-regexp) | |
2802 | (predicate widget-documentation-link-p) | |
2803 | (type widget-documentation-link-type) | |
2804 | (buttons (widget-get widget :buttons))) | |
2805 | (save-excursion | |
2806 | (goto-char from) | |
2807 | (while (re-search-forward regexp to t) | |
2808 | (let ((name (match-string 1)) | |
a1a4fa22 PA |
2809 | (begin (match-beginning 1)) |
2810 | (end (match-end 1))) | |
8697863a PA |
2811 | (when (funcall predicate name) |
2812 | (push (widget-convert-button type begin end :value name) | |
2813 | buttons))))) | |
2814 | (widget-put widget :buttons buttons))) | |
2815 | (let ((indent (widget-get widget :indent))) | |
2816 | (when (and indent (not (zerop indent))) | |
2817 | (save-excursion | |
2818 | (save-restriction | |
2819 | (narrow-to-region from to) | |
2820 | (goto-char (point-min)) | |
2821 | (while (search-forward "\n" nil t) | |
2822 | (insert-char ?\ indent))))))) | |
2823 | ||
2824 | ;;; The `documentation-string' Widget. | |
0ce5b5d5 | 2825 | |
3acab5ef PA |
2826 | (define-widget 'documentation-string 'item |
2827 | "A documentation string." | |
2828 | :format "%v" | |
2829 | :action 'widget-documentation-string-action | |
2830 | :value-delete 'widget-children-value-delete | |
2831 | :value-create 'widget-documentation-string-value-create) | |
2832 | ||
2833 | (defun widget-documentation-string-value-create (widget) | |
2834 | ;; Insert documentation string. | |
2835 | (let ((doc (widget-value widget)) | |
8697863a | 2836 | (indent (widget-get widget :indent)) |
6aaedd12 PA |
2837 | (shown (widget-get (widget-get widget :parent) :documentation-shown)) |
2838 | (start (point))) | |
3acab5ef PA |
2839 | (if (string-match "\n" doc) |
2840 | (let ((before (substring doc 0 (match-beginning 0))) | |
2841 | (after (substring doc (match-beginning 0))) | |
2842 | buttons) | |
2843 | (insert before " ") | |
8697863a | 2844 | (widget-documentation-link-add widget start (point)) |
3acab5ef PA |
2845 | (push (widget-create-child-and-convert |
2846 | widget 'visibility | |
8697863a | 2847 | :help-echo "Show or hide rest of the documentation." |
c6753d66 | 2848 | :off "More" |
3acab5ef PA |
2849 | :action 'widget-parent-action |
2850 | shown) | |
2851 | buttons) | |
2852 | (when shown | |
0ce5b5d5 | 2853 | (setq start (point)) |
8697863a PA |
2854 | (when (and indent (not (zerop indent))) |
2855 | (insert-char ?\ indent)) | |
0ce5b5d5 | 2856 | (insert after) |
8697863a | 2857 | (widget-documentation-link-add widget start (point))) |
3acab5ef | 2858 | (widget-put widget :buttons buttons)) |
6aaedd12 | 2859 | (insert doc) |
8697863a | 2860 | (widget-documentation-link-add widget start (point)))) |
3acab5ef PA |
2861 | (insert "\n")) |
2862 | ||
2863 | (defun widget-documentation-string-action (widget &rest ignore) | |
2864 | ;; Toggle documentation. | |
2865 | (let ((parent (widget-get widget :parent))) | |
2866 | (widget-put parent :documentation-shown | |
2867 | (not (widget-get parent :documentation-shown)))) | |
2868 | ;; Redraw. | |
d543e20b PA |
2869 | (widget-value-set widget (widget-value widget))) |
2870 | ||
2871 | ;;; The Sexp Widgets. | |
2872 | ||
2873 | (define-widget 'const 'item | |
2874 | "An immutable sexp." | |
6d528fc5 | 2875 | :prompt-value 'widget-const-prompt-value |
d543e20b PA |
2876 | :format "%t\n%d") |
2877 | ||
6d528fc5 PA |
2878 | (defun widget-const-prompt-value (widget prompt value unbound) |
2879 | ;; Return the value of the const. | |
2880 | (widget-value widget)) | |
2881 | ||
2882 | (define-widget 'function-item 'const | |
d543e20b PA |
2883 | "An immutable function name." |
2884 | :format "%v\n%h" | |
2885 | :documentation-property (lambda (symbol) | |
2886 | (condition-case nil | |
2887 | (documentation symbol t) | |
2888 | (error nil)))) | |
2889 | ||
6d528fc5 | 2890 | (define-widget 'variable-item 'const |
d543e20b PA |
2891 | "An immutable variable name." |
2892 | :format "%v\n%h" | |
2893 | :documentation-property 'variable-documentation) | |
2894 | ||
6d528fc5 PA |
2895 | (defvar widget-string-prompt-value-history nil |
2896 | "History of input to `widget-string-prompt-value'.") | |
2897 | ||
a3c88c59 PA |
2898 | (define-widget 'string 'editable-field |
2899 | "A string" | |
2900 | :tag "String" | |
2901 | :format "%{%t%}: %v" | |
0ce5b5d5 | 2902 | :complete-function 'ispell-complete-word |
a3c88c59 | 2903 | :prompt-history 'widget-string-prompt-value-history) |
6d528fc5 | 2904 | |
d543e20b PA |
2905 | (define-widget 'regexp 'string |
2906 | "A regular expression." | |
6d528fc5 PA |
2907 | :match 'widget-regexp-match |
2908 | :validate 'widget-regexp-validate | |
c953515e | 2909 | :value-face 'widget-single-line-field-face |
d543e20b PA |
2910 | :tag "Regexp") |
2911 | ||
6d528fc5 PA |
2912 | (defun widget-regexp-match (widget value) |
2913 | ;; Match valid regexps. | |
2914 | (and (stringp value) | |
a3c88c59 | 2915 | (condition-case nil |
6d528fc5 PA |
2916 | (prog1 t |
2917 | (string-match value "")) | |
2918 | (error nil)))) | |
2919 | ||
2920 | (defun widget-regexp-validate (widget) | |
2921 | "Check that the value of WIDGET is a valid regexp." | |
2922 | (let ((val (widget-value widget))) | |
2923 | (condition-case data | |
2924 | (prog1 nil | |
2925 | (string-match val "")) | |
2926 | (error (widget-put widget :error (error-message-string data)) | |
2927 | widget)))) | |
2928 | ||
d543e20b PA |
2929 | (define-widget 'file 'string |
2930 | "A file widget. | |
25ac13b5 | 2931 | It will read a file name from the minibuffer when invoked." |
f1231b8e | 2932 | :complete-function 'widget-file-complete |
6d528fc5 | 2933 | :prompt-value 'widget-file-prompt-value |
a3c88c59 | 2934 | :format "%{%t%}: %v" |
c953515e | 2935 | :value-face 'widget-single-line-field-face |
f1231b8e RS |
2936 | :tag "File") |
2937 | ||
2938 | (defun widget-file-complete () | |
2939 | "Perform completion on file name preceding point." | |
2940 | (interactive) | |
2941 | (let* ((end (point)) | |
2942 | (beg (save-excursion | |
2943 | (skip-chars-backward "^ ") | |
2944 | (point))) | |
2945 | (pattern (buffer-substring beg end)) | |
2946 | (name-part (file-name-nondirectory pattern)) | |
2947 | (directory (file-name-directory pattern)) | |
2948 | (completion (file-name-completion name-part directory))) | |
2949 | (cond ((eq completion t)) | |
2950 | ((null completion) | |
2951 | (message "Can't find completion for \"%s\"" pattern) | |
2952 | (ding)) | |
2953 | ((not (string= name-part completion)) | |
2954 | (delete-region beg end) | |
2955 | (insert (expand-file-name completion directory))) | |
2956 | (t | |
2957 | (message "Making completion list...") | |
2958 | (let ((list (file-name-all-completions name-part directory))) | |
2959 | (setq list (sort list 'string<)) | |
2960 | (with-output-to-temp-buffer "*Completions*" | |
2961 | (display-completion-list list))) | |
2962 | (message "Making completion list...%s" "done"))))) | |
d543e20b | 2963 | |
6d528fc5 PA |
2964 | (defun widget-file-prompt-value (widget prompt value unbound) |
2965 | ;; Read file from minibuffer. | |
2966 | (abbreviate-file-name | |
2967 | (if unbound | |
2968 | (read-file-name prompt) | |
a3c88c59 | 2969 | (let ((prompt2 (format "%s (default %s) " prompt value)) |
6d528fc5 PA |
2970 | (dir (file-name-directory value)) |
2971 | (file (file-name-nondirectory value)) | |
2972 | (must-match (widget-get widget :must-match))) | |
2973 | (read-file-name prompt2 dir nil must-match file))))) | |
2974 | ||
f1231b8e RS |
2975 | ;;;(defun widget-file-action (widget &optional event) |
2976 | ;;; ;; Read a file name from the minibuffer. | |
2977 | ;;; (let* ((value (widget-value widget)) | |
2978 | ;;; (dir (file-name-directory value)) | |
2979 | ;;; (file (file-name-nondirectory value)) | |
2980 | ;;; (menu-tag (widget-apply widget :menu-tag-get)) | |
2981 | ;;; (must-match (widget-get widget :must-match)) | |
2982 | ;;; (answer (read-file-name (concat menu-tag ": (default `" value "') ") | |
2983 | ;;; dir nil must-match file))) | |
2984 | ;;; (widget-value-set widget (abbreviate-file-name answer)) | |
2985 | ;;; (widget-setup) | |
2986 | ;;; (widget-apply widget :notify widget event))) | |
d543e20b PA |
2987 | |
2988 | (define-widget 'directory 'file | |
2989 | "A directory widget. | |
25ac13b5 | 2990 | It will read a directory name from the minibuffer when invoked." |
d543e20b PA |
2991 | :tag "Directory") |
2992 | ||
a3c88c59 PA |
2993 | (defvar widget-symbol-prompt-value-history nil |
2994 | "History of input to `widget-symbol-prompt-value'.") | |
2995 | ||
2996 | (define-widget 'symbol 'editable-field | |
d543e20b PA |
2997 | "A lisp symbol." |
2998 | :value nil | |
2999 | :tag "Symbol" | |
a3c88c59 | 3000 | :format "%{%t%}: %v" |
d543e20b | 3001 | :match (lambda (widget value) (symbolp value)) |
f1231b8e | 3002 | :complete-function 'lisp-complete-symbol |
a3c88c59 PA |
3003 | :prompt-internal 'widget-symbol-prompt-internal |
3004 | :prompt-match 'symbolp | |
3005 | :prompt-history 'widget-symbol-prompt-value-history | |
d543e20b PA |
3006 | :value-to-internal (lambda (widget value) |
3007 | (if (symbolp value) | |
3008 | (symbol-name value) | |
3009 | value)) | |
3010 | :value-to-external (lambda (widget value) | |
3011 | (if (stringp value) | |
3012 | (intern value) | |
3013 | value))) | |
3014 | ||
a3c88c59 PA |
3015 | (defun widget-symbol-prompt-internal (widget prompt initial history) |
3016 | ;; Read file from minibuffer. | |
3017 | (let ((answer (completing-read prompt obarray | |
3018 | (widget-get widget :prompt-match) | |
3019 | nil initial history))) | |
3020 | (if (and (stringp answer) | |
3021 | (not (zerop (length answer)))) | |
3022 | answer | |
3023 | (error "No value")))) | |
3024 | ||
3025 | (defvar widget-function-prompt-value-history nil | |
3026 | "History of input to `widget-function-prompt-value'.") | |
3027 | ||
d543e20b | 3028 | (define-widget 'function 'sexp |
d543e20b | 3029 | "A lisp function." |
0ce5b5d5 | 3030 | :complete-function 'lisp-complete-symbol |
a3c88c59 PA |
3031 | :prompt-value 'widget-field-prompt-value |
3032 | :prompt-internal 'widget-symbol-prompt-internal | |
3033 | :prompt-match 'fboundp | |
3034 | :prompt-history 'widget-function-prompt-value-history | |
3035 | :action 'widget-field-action | |
d543e20b PA |
3036 | :tag "Function") |
3037 | ||
a3c88c59 PA |
3038 | (defvar widget-variable-prompt-value-history nil |
3039 | "History of input to `widget-variable-prompt-value'.") | |
3040 | ||
d543e20b PA |
3041 | (define-widget 'variable 'symbol |
3042 | ;; Should complete on variables. | |
3043 | "A lisp variable." | |
a3c88c59 PA |
3044 | :prompt-match 'boundp |
3045 | :prompt-history 'widget-variable-prompt-value-history | |
d543e20b PA |
3046 | :tag "Variable") |
3047 | ||
6aaedd12 PA |
3048 | (when (featurep 'mule) |
3049 | (defvar widget-coding-system-prompt-value-history nil | |
3050 | "History of input to `widget-coding-system-prompt-value'.") | |
3051 | ||
3052 | (define-widget 'coding-system 'symbol | |
3053 | "A MULE coding-system." | |
3054 | :format "%{%t%}: %v" | |
3055 | :tag "Coding system" | |
3056 | :prompt-history 'widget-coding-system-prompt-value-history | |
3057 | :prompt-value 'widget-coding-system-prompt-value | |
3058 | :action 'widget-coding-system-action) | |
3059 | ||
3060 | (defun widget-coding-system-prompt-value (widget prompt value unbound) | |
3061 | ;; Read coding-system from minibuffer. | |
3062 | (intern | |
3063 | (completing-read (format "%s (default %s) " prompt value) | |
3064 | (mapcar (function | |
3065 | (lambda (sym) | |
3066 | (list (symbol-name sym)) | |
3067 | )) | |
3068 | (coding-system-list))))) | |
3069 | ||
3070 | (defun widget-coding-system-action (widget &optional event) | |
3071 | ;; Read a file name from the minibuffer. | |
3072 | (let ((answer | |
3073 | (widget-coding-system-prompt-value | |
3074 | widget | |
3075 | (widget-apply widget :menu-tag-get) | |
3076 | (widget-value widget) | |
3077 | t))) | |
3078 | (widget-value-set widget answer) | |
3079 | (widget-apply widget :notify widget event) | |
3080 | (widget-setup))) | |
3081 | ) | |
3082 | ||
a3c88c59 | 3083 | (define-widget 'sexp 'editable-field |
d543e20b PA |
3084 | "An arbitrary lisp expression." |
3085 | :tag "Lisp expression" | |
a3c88c59 | 3086 | :format "%{%t%}: %v" |
d543e20b PA |
3087 | :value nil |
3088 | :validate 'widget-sexp-validate | |
3089 | :match (lambda (widget value) t) | |
3090 | :value-to-internal 'widget-sexp-value-to-internal | |
6d528fc5 | 3091 | :value-to-external (lambda (widget value) (read value)) |
a3c88c59 | 3092 | :prompt-history 'widget-sexp-prompt-value-history |
6d528fc5 | 3093 | :prompt-value 'widget-sexp-prompt-value) |
d543e20b PA |
3094 | |
3095 | (defun widget-sexp-value-to-internal (widget value) | |
3096 | ;; Use pp for printer representation. | |
6d1ab9d4 RS |
3097 | (let ((pp (if (symbolp value) |
3098 | (prin1-to-string value) | |
3099 | (pp-to-string value)))) | |
d543e20b PA |
3100 | (while (string-match "\n\\'" pp) |
3101 | (setq pp (substring pp 0 -1))) | |
3102 | (if (or (string-match "\n\\'" pp) | |
3103 | (> (length pp) 40)) | |
3104 | (concat "\n" pp) | |
3105 | pp))) | |
3106 | ||
3107 | (defun widget-sexp-validate (widget) | |
3108 | ;; Valid if we can read the string and there is no junk left after it. | |
3109 | (save-excursion | |
3110 | (let ((buffer (set-buffer (get-buffer-create " *Widget Scratch*")))) | |
3111 | (erase-buffer) | |
3112 | (insert (widget-apply widget :value-get)) | |
3113 | (goto-char (point-min)) | |
3114 | (condition-case data | |
3115 | (let ((value (read buffer))) | |
3116 | (if (eobp) | |
3117 | (if (widget-apply widget :match value) | |
3118 | nil | |
3119 | (widget-put widget :error (widget-get widget :type-error)) | |
3120 | widget) | |
3121 | (widget-put widget | |
3122 | :error (format "Junk at end of expression: %s" | |
3123 | (buffer-substring (point) | |
3124 | (point-max)))) | |
3125 | widget)) | |
3126 | (error (widget-put widget :error (error-message-string data)) | |
3127 | widget))))) | |
3128 | ||
6d528fc5 PA |
3129 | (defvar widget-sexp-prompt-value-history nil |
3130 | "History of input to `widget-sexp-prompt-value'.") | |
3131 | ||
3132 | (defun widget-sexp-prompt-value (widget prompt value unbound) | |
3133 | ;; Read an arbitrary sexp. | |
3134 | (let ((found (read-string prompt | |
a3c88c59 PA |
3135 | (if unbound nil (cons (prin1-to-string value) 0)) |
3136 | (widget-get widget :prompt-history)))) | |
3137 | (save-excursion | |
3138 | (let ((buffer (set-buffer (get-buffer-create " *Widget Scratch*")))) | |
3139 | (erase-buffer) | |
3140 | (insert found) | |
3141 | (goto-char (point-min)) | |
3142 | (let ((answer (read buffer))) | |
3143 | (unless (eobp) | |
3144 | (error "Junk at end of expression: %s" | |
3145 | (buffer-substring (point) (point-max)))) | |
3146 | answer))))) | |
3147 | ||
0b296dac RS |
3148 | (define-widget 'restricted-sexp 'sexp |
3149 | "A Lisp expression restricted to values that match. | |
3150 | To use this type, you must define :match or :match-alternatives." | |
3151 | :type-error "The specified value is not valid" | |
3152 | :match 'widget-restricted-sexp-match | |
3153 | :value-to-internal (lambda (widget value) | |
3154 | (if (widget-apply widget :match value) | |
3155 | (prin1-to-string value) | |
3156 | value))) | |
3157 | ||
3158 | (defun widget-restricted-sexp-match (widget value) | |
3159 | (let ((alternatives (widget-get widget :match-alternatives)) | |
3160 | matched) | |
3161 | (while (and alternatives (not matched)) | |
3162 | (if (cond ((functionp (car alternatives)) | |
3163 | (funcall (car alternatives) value)) | |
3164 | ((and (consp (car alternatives)) | |
3165 | (eq (car (car alternatives)) 'quote)) | |
3166 | (eq value (nth 1 (car alternatives))))) | |
3167 | (setq matched t)) | |
3168 | (setq alternatives (cdr alternatives))) | |
3169 | matched)) | |
3170 | ||
3171 | (define-widget 'integer 'restricted-sexp | |
d543e20b PA |
3172 | "An integer." |
3173 | :tag "Integer" | |
3174 | :value 0 | |
3175 | :type-error "This field should contain an integer" | |
0b296dac RS |
3176 | :match-alternatives '(integerp)) |
3177 | ||
3178 | (define-widget 'number 'restricted-sexp | |
3179 | "A floating point number." | |
3180 | :tag "Number" | |
3181 | :value 0.0 | |
3182 | :type-error "This field should contain a number" | |
3183 | :match-alternatives '(numberp)) | |
d543e20b | 3184 | |
a3c88c59 | 3185 | (define-widget 'character 'editable-field |
0b296dac | 3186 | "A character." |
d543e20b PA |
3187 | :tag "Character" |
3188 | :value 0 | |
3189 | :size 1 | |
3190 | :format "%{%t%}: %v\n" | |
6d528fc5 PA |
3191 | :valid-regexp "\\`.\\'" |
3192 | :error "This field should contain a single character" | |
d543e20b | 3193 | :value-to-internal (lambda (widget value) |
a3c88c59 PA |
3194 | (if (stringp value) |
3195 | value | |
3196 | (char-to-string value))) | |
d543e20b PA |
3197 | :value-to-external (lambda (widget value) |
3198 | (if (stringp value) | |
3199 | (aref value 0) | |
3200 | value)) | |
a3c88c59 PA |
3201 | :match (lambda (widget value) |
3202 | (if (fboundp 'characterp) | |
3203 | (characterp value) | |
3204 | (integerp value)))) | |
d543e20b | 3205 | |
d543e20b PA |
3206 | (define-widget 'list 'group |
3207 | "A lisp list." | |
3208 | :tag "List" | |
3209 | :format "%{%t%}:\n%v") | |
3210 | ||
3211 | (define-widget 'vector 'group | |
3212 | "A lisp vector." | |
3213 | :tag "Vector" | |
3214 | :format "%{%t%}:\n%v" | |
3215 | :match 'widget-vector-match | |
3216 | :value-to-internal (lambda (widget value) (append value nil)) | |
3217 | :value-to-external (lambda (widget value) (apply 'vector value))) | |
3218 | ||
3219 | (defun widget-vector-match (widget value) | |
3220 | (and (vectorp value) | |
3221 | (widget-group-match widget | |
bd042c03 | 3222 | (widget-apply widget :value-to-internal value)))) |
d543e20b PA |
3223 | |
3224 | (define-widget 'cons 'group | |
3225 | "A cons-cell." | |
3226 | :tag "Cons-cell" | |
3227 | :format "%{%t%}:\n%v" | |
3228 | :match 'widget-cons-match | |
3229 | :value-to-internal (lambda (widget value) | |
3230 | (list (car value) (cdr value))) | |
3231 | :value-to-external (lambda (widget value) | |
3232 | (cons (nth 0 value) (nth 1 value)))) | |
3233 | ||
3234 | (defun widget-cons-match (widget value) | |
3235 | (and (consp value) | |
3236 | (widget-group-match widget | |
3237 | (widget-apply widget :value-to-internal value)))) | |
3238 | ||
3239 | (define-widget 'choice 'menu-choice | |
3240 | "A union of several sexp types." | |
3241 | :tag "Choice" | |
c6753d66 | 3242 | :format "%{%t%}: %[Value Menu%] %v" |
8697863a PA |
3243 | :button-prefix 'widget-push-button-prefix |
3244 | :button-suffix 'widget-push-button-suffix | |
a3c88c59 PA |
3245 | :prompt-value 'widget-choice-prompt-value) |
3246 | ||
3247 | (defun widget-choice-prompt-value (widget prompt value unbound) | |
3248 | "Make a choice." | |
3249 | (let ((args (widget-get widget :args)) | |
3250 | (completion-ignore-case (widget-get widget :case-fold)) | |
3251 | current choices old) | |
3252 | ;; Find the first arg that match VALUE. | |
3253 | (let ((look args)) | |
3254 | (while look | |
3255 | (if (widget-apply (car look) :match value) | |
3256 | (setq old (car look) | |
3257 | look nil) | |
3258 | (setq look (cdr look))))) | |
3259 | ;; Find new choice. | |
3260 | (setq current | |
3261 | (cond ((= (length args) 0) | |
3262 | nil) | |
3263 | ((= (length args) 1) | |
3264 | (nth 0 args)) | |
3265 | ((and (= (length args) 2) | |
3266 | (memq old args)) | |
3267 | (if (eq old (nth 0 args)) | |
3268 | (nth 1 args) | |
3269 | (nth 0 args))) | |
3270 | (t | |
3271 | (while args | |
3272 | (setq current (car args) | |
3273 | args (cdr args)) | |
3274 | (setq choices | |
3275 | (cons (cons (widget-apply current :menu-tag-get) | |
3276 | current) | |
3277 | choices))) | |
3278 | (let ((val (completing-read prompt choices nil t))) | |
3279 | (if (stringp val) | |
3280 | (let ((try (try-completion val choices))) | |
3281 | (when (stringp try) | |
3282 | (setq val try)) | |
3283 | (cdr (assoc val choices))) | |
3284 | nil))))) | |
3285 | (if current | |
3286 | (widget-prompt-value current prompt nil t) | |
3287 | value))) | |
d543e20b PA |
3288 | |
3289 | (define-widget 'radio 'radio-button-choice | |
3290 | "A union of several sexp types." | |
3291 | :tag "Choice" | |
a3c88c59 PA |
3292 | :format "%{%t%}:\n%v" |
3293 | :prompt-value 'widget-choice-prompt-value) | |
d543e20b PA |
3294 | |
3295 | (define-widget 'repeat 'editable-list | |
3296 | "A variable length homogeneous list." | |
3297 | :tag "Repeat" | |
3298 | :format "%{%t%}:\n%v%i\n") | |
3299 | ||
3300 | (define-widget 'set 'checklist | |
3301 | "A list of members from a fixed set." | |
3302 | :tag "Set" | |
3303 | :format "%{%t%}:\n%v") | |
3304 | ||
3305 | (define-widget 'boolean 'toggle | |
3306 | "To be nil or non-nil, that is the question." | |
3307 | :tag "Boolean" | |
6d528fc5 | 3308 | :prompt-value 'widget-boolean-prompt-value |
8697863a PA |
3309 | :button-prefix 'widget-push-button-prefix |
3310 | :button-suffix 'widget-push-button-suffix | |
c6753d66 RS |
3311 | :format "%{%t%}: %[Toggle%] %v\n" |
3312 | :on "on (non-nil)" | |
3313 | :off "off (nil)") | |
d543e20b | 3314 | |
6d528fc5 PA |
3315 | (defun widget-boolean-prompt-value (widget prompt value unbound) |
3316 | ;; Toggle a boolean. | |
a3c88c59 | 3317 | (y-or-n-p prompt)) |
6d528fc5 | 3318 | |
d543e20b PA |
3319 | ;;; The `color' Widget. |
3320 | ||
3321 | (define-widget 'color-item 'choice-item | |
3322 | "A color name (with sample)." | |
3323 | :format "%v (%{sample%})\n" | |
3324 | :sample-face-get 'widget-color-item-button-face-get) | |
3325 | ||
3326 | (defun widget-color-item-button-face-get (widget) | |
25ac13b5 PA |
3327 | (let ((symbol (intern (concat "fg:" (widget-value widget))))) |
3328 | (if (string-match "XEmacs" emacs-version) | |
3329 | (prog1 symbol | |
3330 | (or (find-face symbol) | |
3331 | (set-face-foreground (make-face symbol) (widget-value widget)))) | |
3332 | (condition-case nil | |
3333 | (facemenu-get-face symbol) | |
3334 | (error 'default))))) | |
d543e20b PA |
3335 | |
3336 | (define-widget 'color 'push-button | |
3337 | "Choose a color name (with sample)." | |
3338 | :format "%[%t%]: %v" | |
3339 | :tag "Color" | |
3340 | :value "black" | |
3341 | :value-create 'widget-color-value-create | |
3342 | :value-delete 'widget-children-value-delete | |
3343 | :value-get 'widget-color-value-get | |
3344 | :value-set 'widget-color-value-set | |
3345 | :action 'widget-color-action | |
3346 | :match 'widget-field-match | |
3347 | :tag "Color") | |
3348 | ||
3349 | (defvar widget-color-choice-list nil) | |
3350 | ;; Variable holding the possible colors. | |
3351 | ||
3352 | (defun widget-color-choice-list () | |
3353 | (unless widget-color-choice-list | |
3354 | (setq widget-color-choice-list | |
3355 | (mapcar '(lambda (color) (list color)) | |
3356 | (x-defined-colors)))) | |
3357 | widget-color-choice-list) | |
3358 | ||
3359 | (defun widget-color-value-create (widget) | |
3360 | (let ((child (widget-create-child-and-convert | |
3361 | widget 'color-item (widget-get widget :value)))) | |
3362 | (widget-put widget :children (list child)))) | |
3363 | ||
3364 | (defun widget-color-value-get (widget) | |
3365 | ;; Pass command to first child. | |
3366 | (widget-apply (car (widget-get widget :children)) :value-get)) | |
3367 | ||
3368 | (defun widget-color-value-set (widget value) | |
3369 | ;; Pass command to first child. | |
3370 | (widget-apply (car (widget-get widget :children)) :value-set value)) | |
3371 | ||
3372 | (defvar widget-color-history nil | |
3373 | "History of entered colors") | |
3374 | ||
3375 | (defun widget-color-action (widget &optional event) | |
3376 | ;; Prompt for a color. | |
3377 | (let* ((tag (widget-apply widget :menu-tag-get)) | |
3378 | (prompt (concat tag ": ")) | |
3379 | (answer (cond ((string-match "XEmacs" emacs-version) | |
3380 | (read-color prompt)) | |
3381 | ((fboundp 'x-defined-colors) | |
3382 | (completing-read (concat tag ": ") | |
3383 | (widget-color-choice-list) | |
3384 | nil nil nil 'widget-color-history)) | |
3385 | (t | |
3386 | (read-string prompt (widget-value widget)))))) | |
3387 | (unless (zerop (length answer)) | |
3388 | (widget-value-set widget answer) | |
0a3a0b56 PA |
3389 | (widget-setup) |
3390 | (widget-apply widget :notify widget event)))) | |
d543e20b PA |
3391 | |
3392 | ;;; The Help Echo | |
3393 | ||
3394 | (defun widget-echo-help-mouse () | |
3395 | "Display the help message for the widget under the mouse. | |
3396 | Enable with (run-with-idle-timer 1 t 'widget-echo-help-mouse)" | |
3397 | (let* ((pos (mouse-position)) | |
3398 | (frame (car pos)) | |
3399 | (x (car (cdr pos))) | |
3400 | (y (cdr (cdr pos))) | |
3401 | (win (window-at x y frame)) | |
3402 | (where (coordinates-in-window-p (cons x y) win))) | |
3403 | (when (consp where) | |
3404 | (save-window-excursion | |
3405 | (progn ; save-excursion | |
3406 | (select-window win) | |
3407 | (let* ((result (compute-motion (window-start win) | |
3408 | '(0 . 0) | |
3409 | (window-end win) | |
3410 | where | |
3411 | (window-width win) | |
3412 | (cons (window-hscroll) 0) | |
3413 | win))) | |
3414 | (when (and (eq (nth 1 result) x) | |
3415 | (eq (nth 2 result) y)) | |
3416 | (widget-echo-help (nth 0 result)))))))) | |
3417 | (unless track-mouse | |
3418 | (setq track-mouse t) | |
3419 | (add-hook 'post-command-hook 'widget-stop-mouse-tracking))) | |
3420 | ||
3421 | (defun widget-stop-mouse-tracking (&rest args) | |
3422 | "Stop the mouse tracking done while idle." | |
3423 | (remove-hook 'post-command-hook 'widget-stop-mouse-tracking) | |
3424 | (setq track-mouse nil)) | |
3425 | ||
3426 | (defun widget-at (pos) | |
3427 | "The button or field at POS." | |
0a3a0b56 PA |
3428 | (or (get-char-property pos 'button) |
3429 | (get-char-property pos 'field))) | |
d543e20b PA |
3430 | |
3431 | (defun widget-echo-help (pos) | |
3432 | "Display the help echo for widget at POS." | |
3433 | (let* ((widget (widget-at pos)) | |
3434 | (help-echo (and widget (widget-get widget :help-echo)))) | |
3435 | (cond ((stringp help-echo) | |
3436 | (message "%s" help-echo)) | |
3437 | ((and (symbolp help-echo) (fboundp help-echo) | |
3438 | (stringp (setq help-echo (funcall help-echo widget)))) | |
3439 | (message "%s" help-echo))))) | |
3440 | ||
3441 | ;;; The End: | |
3442 | ||
3443 | (provide 'wid-edit) | |
3444 | ||
3445 | ;; wid-edit.el ends here |