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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 | |
4ee1cf9f | 7 | ;; Version: 1.9951 |
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") | |
4ee1cf9f | 41 | (autoload 'finder-commentary "finder" nil t) |
d543e20b PA |
42 | |
43 | (when (string-match "XEmacs" emacs-version) | |
44 | (condition-case nil | |
45 | (require 'overlay) | |
46 | (error (load-library "x-overlay")))) | |
47 | ||
a3c88c59 PA |
48 | (if (string-match "XEmacs" emacs-version) |
49 | (defun widget-event-point (event) | |
50 | "Character position of the end of event if that exists, or nil." | |
51 | (if (mouse-event-p event) | |
52 | (event-point event) | |
53 | nil)) | |
54 | (defun widget-event-point (event) | |
55 | "Character position of the end of event if that exists, or nil." | |
56 | (posn-point (event-end event)))) | |
57 | ||
c953515e | 58 | (defalias 'widget-read-event (if (string-match "XEmacs" emacs-version) |
0ce5b5d5 PA |
59 | 'next-event |
60 | 'read-event)) | |
61 | ||
d543e20b PA |
62 | (unless (and (featurep 'custom) (fboundp 'custom-declare-variable)) |
63 | ;; We have the old custom-library, hack around it! | |
64 | (defmacro defgroup (&rest args) nil) | |
65 | (defmacro defcustom (var value doc &rest args) | |
6d528fc5 | 66 | (` (defvar (, var) (, value) (, doc)))) |
d543e20b PA |
67 | (defmacro defface (&rest args) nil) |
68 | (define-widget-keywords :prefix :tag :load :link :options :type :group) | |
69 | (when (fboundp 'copy-face) | |
70 | (copy-face 'default 'widget-documentation-face) | |
71 | (copy-face 'bold 'widget-button-face) | |
72 | (copy-face 'italic 'widget-field-face))) | |
73 | ||
a3c88c59 PA |
74 | (unless (fboundp 'button-release-event-p) |
75 | ;; XEmacs function missing from Emacs. | |
76 | (defun button-release-event-p (event) | |
77 | "Non-nil if EVENT is a mouse-button-release event object." | |
78 | (and (eventp event) | |
79 | (memq (event-basic-type event) '(mouse-1 mouse-2 mouse-3)) | |
80 | (or (memq 'click (event-modifiers event)) | |
81 | (memq 'drag (event-modifiers event)))))) | |
d543e20b | 82 | |
c953515e PA |
83 | (unless (fboundp 'functionp) |
84 | ;; Missing from Emacs 19.34 and earlier. | |
85 | (defun functionp (object) | |
86 | "Non-nil of OBJECT is a type of object that can be called as a function." | |
87 | (or (subrp object) (byte-code-function-p object) | |
88 | (eq (car-safe object) 'lambda) | |
89 | (and (symbolp object) (fboundp object))))) | |
90 | ||
d543e20b PA |
91 | (unless (fboundp 'error-message-string) |
92 | ;; Emacs function missing in XEmacs. | |
93 | (defun error-message-string (obj) | |
94 | "Convert an error value to an error message." | |
95 | (let ((buf (get-buffer-create " *error-message*"))) | |
96 | (erase-buffer buf) | |
97 | (display-error obj buf) | |
98 | (buffer-string buf))))) | |
99 | ||
100 | ;;; Customization. | |
101 | ||
102 | (defgroup widgets nil | |
103 | "Customization support for the Widget Library." | |
104 | :link '(custom-manual "(widget)Top") | |
105 | :link '(url-link :tag "Development Page" | |
106 | "http://www.dina.kvl.dk/~abraham/custom/") | |
62f44662 | 107 | :link '(emacs-library-link :tag "Lisp File" "widget.el") |
d543e20b PA |
108 | :prefix "widget-" |
109 | :group 'extensions | |
d543e20b PA |
110 | :group 'hypermedia) |
111 | ||
8697863a PA |
112 | (defgroup widget-documentation nil |
113 | "Options controling the display of documentation strings." | |
114 | :group 'widgets) | |
115 | ||
6aaedd12 PA |
116 | (defgroup widget-faces nil |
117 | "Faces used by the widget library." | |
118 | :group 'widgets | |
119 | :group 'faces) | |
120 | ||
0b296dac RS |
121 | (defvar widget-documentation-face 'widget-documentation-face |
122 | "Face used for documentation strings in widges. | |
123 | This exists as a variable so it can be set locally in certain buffers.") | |
124 | ||
8697863a PA |
125 | (defface widget-documentation-face '((((class color) |
126 | (background dark)) | |
127 | (:foreground "lime green")) | |
128 | (((class color) | |
129 | (background light)) | |
130 | (:foreground "dark green")) | |
131 | (t nil)) | |
132 | "Face used for documentation text." | |
133 | :group 'widget-documentation | |
134 | :group 'widget-faces) | |
135 | ||
2f477381 RS |
136 | (defvar widget-button-face 'widget-button-face |
137 | "Face used for buttons in widges. | |
138 | This exists as a variable so it can be set locally in certain buffers.") | |
139 | ||
d543e20b PA |
140 | (defface widget-button-face '((t (:bold t))) |
141 | "Face used for widget buttons." | |
6aaedd12 | 142 | :group 'widget-faces) |
d543e20b PA |
143 | |
144 | (defcustom widget-mouse-face 'highlight | |
145 | "Face used for widget buttons when the mouse is above them." | |
146 | :type 'face | |
6aaedd12 | 147 | :group 'widget-faces) |
d543e20b PA |
148 | |
149 | (defface widget-field-face '((((class grayscale color) | |
150 | (background light)) | |
6d528fc5 | 151 | (:background "gray85")) |
d543e20b PA |
152 | (((class grayscale color) |
153 | (background dark)) | |
25ac13b5 | 154 | (:background "dim gray")) |
d543e20b PA |
155 | (t |
156 | (:italic t))) | |
157 | "Face used for editable fields." | |
6aaedd12 | 158 | :group 'widget-faces) |
d543e20b | 159 | |
c953515e PA |
160 | (defface widget-single-line-field-face '((((class grayscale color) |
161 | (background light)) | |
162 | (:background "gray85")) | |
163 | (((class grayscale color) | |
164 | (background dark)) | |
165 | (:background "dim gray")) | |
166 | (t | |
167 | (:italic t))) | |
168 | "Face used for editable fields spanning only a single line." | |
169 | :group 'widget-faces) | |
170 | ||
33eae9c0 RS |
171 | ;;; This causes display-table to be loaded, and not usefully. |
172 | ;;;(defvar widget-single-line-display-table | |
173 | ;;; (let ((table (make-display-table))) | |
174 | ;;; (aset table 9 "^I") | |
175 | ;;; (aset table 10 "^J") | |
176 | ;;; table) | |
177 | ;;; "Display table used for single-line editable fields.") | |
178 | ||
179 | ;;;(when (fboundp 'set-face-display-table) | |
180 | ;;; (set-face-display-table 'widget-single-line-field-face | |
181 | ;;; widget-single-line-display-table)) | |
c953515e | 182 | |
d543e20b PA |
183 | ;;; Utility functions. |
184 | ;; | |
185 | ;; These are not really widget specific. | |
186 | ||
d543e20b PA |
187 | (defun widget-princ-to-string (object) |
188 | ;; Return string representation of OBJECT, any Lisp object. | |
189 | ;; No quoting characters are used; no delimiters are printed around | |
190 | ;; the contents of strings. | |
191 | (save-excursion | |
192 | (set-buffer (get-buffer-create " *widget-tmp*")) | |
193 | (erase-buffer) | |
194 | (let ((standard-output (current-buffer))) | |
195 | (princ object)) | |
196 | (buffer-string))) | |
197 | ||
198 | (defun widget-clear-undo () | |
199 | "Clear all undo information." | |
200 | (buffer-disable-undo (current-buffer)) | |
201 | (buffer-enable-undo)) | |
202 | ||
a3c88c59 PA |
203 | (defcustom widget-menu-max-size 40 |
204 | "Largest number of items allowed in a popup-menu. | |
205 | Larger menus are read through the minibuffer." | |
206 | :group 'widgets | |
207 | :type 'integer) | |
208 | ||
c953515e | 209 | (defcustom widget-menu-minibuffer-flag (string-match "XEmacs" emacs-version) |
0b296dac RS |
210 | "*Control how to ask for a choice from the keyboard. |
211 | Non-nil means use the minibuffer; | |
212 | nil means read a single character." | |
213 | :group 'widgets | |
214 | :type 'boolean) | |
215 | ||
d543e20b PA |
216 | (defun widget-choose (title items &optional event) |
217 | "Choose an item from a list. | |
218 | ||
219 | First argument TITLE is the name of the list. | |
6d528fc5 PA |
220 | Second argument ITEMS is an list whose members are either |
221 | (NAME . VALUE), to indicate selectable items, or just strings to | |
222 | indicate unselectable items. | |
d543e20b PA |
223 | Optional third argument EVENT is an input event. |
224 | ||
225 | The user is asked to choose between each NAME from the items alist, | |
226 | and the VALUE of the chosen element will be returned. If EVENT is a | |
227 | mouse event, and the number of elements in items is less than | |
228 | `widget-menu-max-size', a popup menu will be used, otherwise the | |
229 | minibuffer." | |
230 | (cond ((and (< (length items) widget-menu-max-size) | |
231 | event (fboundp 'x-popup-menu) window-system) | |
232 | ;; We are in Emacs-19, pressed by the mouse | |
233 | (x-popup-menu event | |
234 | (list title (cons "" items)))) | |
235 | ((and (< (length items) widget-menu-max-size) | |
236 | event (fboundp 'popup-menu) window-system) | |
237 | ;; We are in XEmacs, pressed by the mouse | |
238 | (let ((val (get-popup-menu-response | |
239 | (cons title | |
240 | (mapcar | |
241 | (function | |
242 | (lambda (x) | |
6d528fc5 PA |
243 | (if (stringp x) |
244 | (vector x nil nil) | |
245 | (vector (car x) (list (car x)) t)))) | |
d543e20b PA |
246 | items))))) |
247 | (setq val (and val | |
248 | (listp (event-object val)) | |
249 | (stringp (car-safe (event-object val))) | |
250 | (car (event-object val)))) | |
251 | (cdr (assoc val items)))) | |
0b296dac RS |
252 | (widget-menu-minibuffer-flag |
253 | ;; Read the choice of name from the minibuffer. | |
e5dfabb4 | 254 | (setq items (widget-remove-if 'stringp items)) |
d543e20b PA |
255 | (let ((val (completing-read (concat title ": ") items nil t))) |
256 | (if (stringp val) | |
257 | (let ((try (try-completion val items))) | |
258 | (when (stringp try) | |
259 | (setq val try)) | |
260 | (cdr (assoc val items))) | |
0b296dac RS |
261 | nil))) |
262 | (t | |
263 | ;; Construct a menu of the choices | |
264 | ;; and then use it for prompting for a single character. | |
265 | (let* ((overriding-terminal-local-map | |
266 | (make-sparse-keymap)) | |
267 | map choice (next-digit ?0) | |
cfc198e5 | 268 | some-choice-enabled |
0b296dac RS |
269 | value) |
270 | ;; Define SPC as a prefix char to get to this menu. | |
271 | (define-key overriding-terminal-local-map " " | |
272 | (setq map (make-sparse-keymap title))) | |
d4b8422f RS |
273 | (save-excursion |
274 | (set-buffer (get-buffer-create " widget-choose")) | |
275 | (erase-buffer) | |
276 | (insert "Available choices:\n\n") | |
277 | (while items | |
278 | (setq choice (car items) items (cdr items)) | |
279 | (if (consp choice) | |
280 | (let* ((name (car choice)) | |
281 | (function (cdr choice))) | |
282 | (insert (format "%c = %s\n" next-digit name)) | |
cfc198e5 RS |
283 | (define-key map (vector next-digit) function) |
284 | (setq some-choice-enabled t))) | |
d4b8422f RS |
285 | ;; Allocate digits to disabled alternatives |
286 | ;; so that the digit of a given alternative never varies. | |
287 | (setq next-digit (1+ next-digit))) | |
288 | (insert "\nC-g = Quit")) | |
cfc198e5 RS |
289 | (or some-choice-enabled |
290 | (error "None of the choices is currently meaningful")) | |
d4b8422f | 291 | (define-key map [?\C-g] 'keyboard-quit) |
0b296dac | 292 | (define-key map [t] 'keyboard-quit) |
4d52438e KH |
293 | (define-key map [?\M-\C-v] 'scroll-other-window) |
294 | (define-key map [?\M--] 'negative-argument) | |
0b296dac | 295 | (setcdr map (nreverse (cdr map))) |
0b296dac RS |
296 | ;; Read a char with the menu, and return the result |
297 | ;; that corresponds to it. | |
d4b8422f | 298 | (save-window-excursion |
4d52438e KH |
299 | (let ((buf (get-buffer " widget-choose"))) |
300 | (display-buffer buf) | |
301 | (let ((cursor-in-echo-area t) | |
302 | keys | |
303 | (char 0) | |
304 | (arg 1)) | |
305 | (while (not (or (and (>= char ?0) (< char next-digit)) | |
306 | (eq value 'keyboard-quit))) | |
307 | ;; Unread a SPC to lead to our new menu. | |
308 | (setq unread-command-events (cons ?\ unread-command-events)) | |
309 | (setq keys (read-key-sequence title)) | |
310 | (setq value (lookup-key overriding-terminal-local-map keys t) | |
311 | char (string-to-char (substring keys 1))) | |
312 | (cond ((eq value 'scroll-other-window) | |
313 | (let ((minibuffer-scroll-window (get-buffer-window buf))) | |
314 | (if (> 0 arg) | |
315 | (scroll-other-window-down (window-height minibuffer-scroll-window)) | |
316 | (scroll-other-window)) | |
317 | (setq arg 1))) | |
318 | ((eq value 'negative-argument) | |
319 | (setq arg -1)) | |
320 | (t | |
321 | (setq arg 1))))))) | |
0b296dac RS |
322 | (when (eq value 'keyboard-quit) |
323 | (error "Canceled")) | |
324 | value)))) | |
d543e20b | 325 | |
e5dfabb4 RS |
326 | (defun widget-remove-if (predictate list) |
327 | (let (result (tail list)) | |
328 | (while tail | |
329 | (or (funcall predictate (car tail)) | |
330 | (setq result (cons (car tail) result))) | |
331 | (setq tail (cdr tail))) | |
332 | (nreverse result))) | |
333 | ||
d543e20b PA |
334 | ;;; Widget text specifications. |
335 | ;; | |
336 | ;; These functions are for specifying text properties. | |
337 | ||
8697863a PA |
338 | (defcustom widget-field-add-space |
339 | (or (< emacs-major-version 20) | |
340 | (and (eq emacs-major-version 20) | |
341 | (< emacs-minor-version 3)) | |
342 | (not (string-match "XEmacs" emacs-version))) | |
343 | "Non-nil means add extra space at the end of editable text fields. | |
344 | ||
345 | This is needed on all versions of Emacs, and on XEmacs before 20.3. | |
346 | If you don't add the space, it will become impossible to edit a zero | |
347 | size field." | |
348 | :type 'boolean | |
349 | :group 'widgets) | |
350 | ||
da5ec617 | 351 | (defcustom widget-field-use-before-change |
4ee1cf9f PA |
352 | (and (or (> emacs-minor-version 34) |
353 | (> emacs-major-version 19)) | |
354 | (not (string-match "XEmacs" emacs-version))) | |
da5ec617 | 355 | "Non-nil means use `before-change-functions' to track editable fields. |
cfc198e5 | 356 | This enables the use of undo, but doesn't work on Emacs 19.34 and earlier. |
da5ec617 PA |
357 | Using before hooks also means that the :notify function can't know the |
358 | new value." | |
359 | :type 'boolean | |
360 | :group 'widgets) | |
361 | ||
d543e20b | 362 | (defun widget-specify-field (widget from to) |
0a3a0b56 | 363 | "Specify editable button for WIDGET between FROM and TO." |
0ce5b5d5 PA |
364 | ;; Terminating space is not part of the field, but necessary in |
365 | ;; order for local-map to work. Remove next sexp if local-map works | |
366 | ;; at the end of the overlay. | |
367 | (save-excursion | |
368 | (goto-char to) | |
62f44662 PA |
369 | (cond ((null (widget-get widget :size)) |
370 | (forward-char 1)) | |
371 | (widget-field-add-space | |
372 | (insert-and-inherit " "))) | |
0ce5b5d5 | 373 | (setq to (point))) |
d543e20b | 374 | (let ((map (widget-get widget :keymap)) |
0a3a0b56 PA |
375 | (face (or (widget-get widget :value-face) 'widget-field-face)) |
376 | (help-echo (widget-get widget :help-echo)) | |
62f44662 PA |
377 | (overlay (make-overlay from to nil |
378 | nil (or (not widget-field-add-space) | |
379 | (widget-get widget :size))))) | |
d543e20b | 380 | (unless (or (stringp help-echo) (null help-echo)) |
0a3a0b56 PA |
381 | (setq help-echo 'widget-mouse-help)) |
382 | (widget-put widget :field-overlay overlay) | |
383 | (overlay-put overlay 'detachable nil) | |
384 | (overlay-put overlay 'field widget) | |
385 | (overlay-put overlay 'local-map map) | |
386 | (overlay-put overlay 'keymap map) | |
387 | (overlay-put overlay 'face face) | |
388 | (overlay-put overlay 'balloon-help help-echo) | |
389 | (overlay-put overlay 'help-echo help-echo))) | |
d543e20b | 390 | |
d543e20b | 391 | (defun widget-specify-button (widget from to) |
0a3a0b56 | 392 | "Specify button for WIDGET between FROM and TO." |
d543e20b | 393 | (let ((face (widget-apply widget :button-face-get)) |
0a3a0b56 PA |
394 | (help-echo (widget-get widget :help-echo)) |
395 | (overlay (make-overlay from to nil t nil))) | |
396 | (widget-put widget :button-overlay overlay) | |
d543e20b PA |
397 | (unless (or (null help-echo) (stringp help-echo)) |
398 | (setq help-echo 'widget-mouse-help)) | |
0a3a0b56 PA |
399 | (overlay-put overlay 'button widget) |
400 | (overlay-put overlay 'mouse-face widget-mouse-face) | |
401 | (overlay-put overlay 'balloon-help help-echo) | |
402 | (overlay-put overlay 'help-echo help-echo) | |
403 | (overlay-put overlay 'face face))) | |
d543e20b PA |
404 | |
405 | (defun widget-mouse-help (extent) | |
406 | "Find mouse help string for button in extent." | |
407 | (let* ((widget (widget-at (extent-start-position extent))) | |
408 | (help-echo (and widget (widget-get widget :help-echo)))) | |
409 | (cond ((stringp help-echo) | |
410 | help-echo) | |
411 | ((and (symbolp help-echo) (fboundp help-echo) | |
412 | (stringp (setq help-echo (funcall help-echo widget)))) | |
413 | help-echo) | |
414 | (t | |
415 | (format "(widget %S :help-echo %S)" widget help-echo))))) | |
416 | ||
417 | (defun widget-specify-sample (widget from to) | |
418 | ;; Specify sample for WIDGET between FROM and TO. | |
0f648ca2 PA |
419 | (let ((face (widget-apply widget :sample-face-get)) |
420 | (overlay (make-overlay from to nil t nil))) | |
421 | (overlay-put overlay 'face face) | |
422 | (widget-put widget :sample-overlay overlay))) | |
423 | ||
d543e20b PA |
424 | (defun widget-specify-doc (widget from to) |
425 | ;; Specify documentation for WIDGET between FROM and TO. | |
4ee1cf9f PA |
426 | (let ((overlay (make-overlay from to nil t nil))) |
427 | (overlay-put overlay 'widget-doc widget) | |
428 | (overlay-put overlay 'face widget-documentation-face) | |
429 | (widget-put widget :doc-overlay overlay))) | |
d543e20b PA |
430 | |
431 | (defmacro widget-specify-insert (&rest form) | |
432 | ;; Execute FORM without inheriting any text properties. | |
6d528fc5 PA |
433 | (` |
434 | (save-restriction | |
d543e20b PA |
435 | (let ((inhibit-read-only t) |
436 | result | |
c6753d66 | 437 | before-change-functions |
d543e20b PA |
438 | after-change-functions) |
439 | (insert "<>") | |
440 | (narrow-to-region (- (point) 2) (point)) | |
d543e20b | 441 | (goto-char (1+ (point-min))) |
6d528fc5 | 442 | (setq result (progn (,@ form))) |
d543e20b PA |
443 | (delete-region (point-min) (1+ (point-min))) |
444 | (delete-region (1- (point-max)) (point-max)) | |
445 | (goto-char (point-max)) | |
6d528fc5 | 446 | result)))) |
d543e20b PA |
447 | |
448 | (defface widget-inactive-face '((((class grayscale color) | |
449 | (background dark)) | |
450 | (:foreground "light gray")) | |
451 | (((class grayscale color) | |
452 | (background light)) | |
83427907 | 453 | (:foreground "dim gray")) |
d543e20b PA |
454 | (t |
455 | (:italic t))) | |
456 | "Face used for inactive widgets." | |
6aaedd12 | 457 | :group 'widget-faces) |
d543e20b PA |
458 | |
459 | (defun widget-specify-inactive (widget from to) | |
460 | "Make WIDGET inactive for user modifications." | |
461 | (unless (widget-get widget :inactive) | |
462 | (let ((overlay (make-overlay from to nil t nil))) | |
463 | (overlay-put overlay 'face 'widget-inactive-face) | |
6aaedd12 PA |
464 | ;; This is disabled, as it makes the mouse cursor change shape. |
465 | ;; (overlay-put overlay 'mouse-face 'widget-inactive-face) | |
6d528fc5 PA |
466 | (overlay-put overlay 'evaporate t) |
467 | (overlay-put overlay 'priority 100) | |
d543e20b PA |
468 | (overlay-put overlay (if (string-match "XEmacs" emacs-version) |
469 | 'read-only | |
470 | 'modification-hooks) '(widget-overlay-inactive)) | |
471 | (widget-put widget :inactive overlay)))) | |
472 | ||
473 | (defun widget-overlay-inactive (&rest junk) | |
474 | "Ignoring the arguments, signal an error." | |
475 | (unless inhibit-read-only | |
476 | (error "Attempt to modify inactive widget"))) | |
477 | ||
478 | ||
479 | (defun widget-specify-active (widget) | |
480 | "Make WIDGET active for user modifications." | |
481 | (let ((inactive (widget-get widget :inactive))) | |
482 | (when inactive | |
483 | (delete-overlay inactive) | |
484 | (widget-put widget :inactive nil)))) | |
485 | ||
486 | ;;; Widget Properties. | |
487 | ||
488 | (defsubst widget-type (widget) | |
489 | "Return the type of WIDGET, a symbol." | |
490 | (car widget)) | |
491 | ||
944c91b6 PA |
492 | (defun widget-get-indirect (widget property) |
493 | "In WIDGET, get the value of PROPERTY. | |
494 | If the value is a symbol, return its binding. | |
495 | Otherwise, just return the value." | |
496 | (let ((value (widget-get widget property))) | |
497 | (if (symbolp value) | |
498 | (symbol-value value) | |
499 | value))) | |
500 | ||
d543e20b PA |
501 | (defun widget-member (widget property) |
502 | "Non-nil iff there is a definition in WIDGET for PROPERTY." | |
503 | (cond ((widget-plist-member (cdr widget) property) | |
504 | t) | |
505 | ((car widget) | |
506 | (widget-member (get (car widget) 'widget-type) property)) | |
507 | (t nil))) | |
508 | ||
d543e20b PA |
509 | (defun widget-value (widget) |
510 | "Extract the current value of WIDGET." | |
511 | (widget-apply widget | |
512 | :value-to-external (widget-apply widget :value-get))) | |
513 | ||
514 | (defun widget-value-set (widget value) | |
515 | "Set the current value of WIDGET to VALUE." | |
516 | (widget-apply widget | |
517 | :value-set (widget-apply widget | |
518 | :value-to-internal value))) | |
519 | ||
520 | (defun widget-match-inline (widget vals) | |
521 | ;; In WIDGET, match the start of VALS. | |
522 | (cond ((widget-get widget :inline) | |
523 | (widget-apply widget :match-inline vals)) | |
524 | ((and vals | |
525 | (widget-apply widget :match (car vals))) | |
526 | (cons (list (car vals)) (cdr vals))) | |
527 | (t nil))) | |
528 | ||
529 | (defun widget-apply-action (widget &optional event) | |
530 | "Apply :action in WIDGET in response to EVENT." | |
8697863a PA |
531 | (if (widget-apply widget :active) |
532 | (widget-apply widget :action event) | |
533 | (error "Attempt to perform action on inactive widget"))) | |
6d528fc5 | 534 | |
a3c88c59 PA |
535 | ;;; Helper functions. |
536 | ;; | |
537 | ;; These are widget specific. | |
538 | ||
539 | ;;;###autoload | |
540 | (defun widget-prompt-value (widget prompt &optional value unbound) | |
541 | "Prompt for a value matching WIDGET, using PROMPT. | |
542 | The current value is assumed to be VALUE, unless UNBOUND is non-nil." | |
543 | (unless (listp widget) | |
544 | (setq widget (list widget))) | |
545 | (setq prompt (format "[%s] %s" (widget-type widget) prompt)) | |
546 | (setq widget (widget-convert widget)) | |
547 | (let ((answer (widget-apply widget :prompt-value prompt value unbound))) | |
548 | (unless (widget-apply widget :match answer) | |
549 | (error "Value does not match %S type." (car widget))) | |
550 | answer)) | |
551 | ||
552 | (defun widget-get-sibling (widget) | |
553 | "Get the item WIDGET is assumed to toggle. | |
554 | This is only meaningful for radio buttons or checkboxes in a list." | |
555 | (let* ((parent (widget-get widget :parent)) | |
556 | (children (widget-get parent :children)) | |
557 | child) | |
558 | (catch 'child | |
559 | (while children | |
560 | (setq child (car children) | |
561 | children (cdr children)) | |
562 | (when (eq (widget-get child :button) widget) | |
563 | (throw 'child child))) | |
564 | nil))) | |
565 | ||
6aaedd12 PA |
566 | (defun widget-map-buttons (function &optional buffer maparg) |
567 | "Map FUNCTION over the buttons in BUFFER. | |
568 | FUNCTION is called with the arguments WIDGET and MAPARG. | |
569 | ||
570 | If FUNCTION returns non-nil, the walk is cancelled. | |
571 | ||
572 | The arguments MAPARG, and BUFFER default to nil and (current-buffer), | |
573 | respectively." | |
574 | (let ((cur (point-min)) | |
575 | (widget nil) | |
576 | (parent nil) | |
577 | (overlays (if buffer | |
578 | (save-excursion (set-buffer buffer) (overlay-lists)) | |
579 | (overlay-lists)))) | |
580 | (setq overlays (append (car overlays) (cdr overlays))) | |
581 | (while (setq cur (pop overlays)) | |
582 | (setq widget (overlay-get cur 'button)) | |
583 | (if (and widget (funcall function widget maparg)) | |
584 | (setq overlays nil))))) | |
585 | ||
d543e20b PA |
586 | ;;; Glyphs. |
587 | ||
588 | (defcustom widget-glyph-directory (concat data-directory "custom/") | |
589 | "Where widget glyphs are located. | |
590 | If this variable is nil, widget will try to locate the directory | |
25ac13b5 | 591 | automatically." |
d543e20b PA |
592 | :group 'widgets |
593 | :type 'directory) | |
594 | ||
595 | (defcustom widget-glyph-enable t | |
596 | "If non nil, use glyphs in images when available." | |
597 | :group 'widgets | |
598 | :type 'boolean) | |
599 | ||
25ac13b5 PA |
600 | (defcustom widget-image-conversion |
601 | '((xpm ".xpm") (gif ".gif") (png ".png") (jpeg ".jpg" ".jpeg") | |
602 | (xbm ".xbm")) | |
603 | "Conversion alist from image formats to file name suffixes." | |
604 | :group 'widgets | |
605 | :type '(repeat (cons :format "%v" | |
606 | (symbol :tag "Image Format" unknown) | |
607 | (repeat :tag "Suffixes" | |
608 | (string :format "%v"))))) | |
609 | ||
3acab5ef PA |
610 | (defun widget-glyph-find (image tag) |
611 | "Create a glyph corresponding to IMAGE with string TAG as fallback. | |
612 | IMAGE should either already be a glyph, or be a file name sans | |
613 | extension (xpm, xbm, gif, jpg, or png) located in | |
614 | `widget-glyph-directory'." | |
615 | (cond ((not (and image | |
616 | (string-match "XEmacs" emacs-version) | |
d543e20b PA |
617 | widget-glyph-enable |
618 | (fboundp 'make-glyph) | |
25ac13b5 | 619 | (fboundp 'locate-file) |
d543e20b PA |
620 | image)) |
621 | ;; We don't want or can't use glyphs. | |
3acab5ef | 622 | nil) |
d543e20b PA |
623 | ((and (fboundp 'glyphp) |
624 | (glyphp image)) | |
3acab5ef PA |
625 | ;; Already a glyph. Use it. |
626 | image) | |
25ac13b5 PA |
627 | ((stringp image) |
628 | ;; A string. Look it up in relevant directories. | |
629 | (let* ((dirlist (list (or widget-glyph-directory | |
630 | (concat data-directory | |
631 | "custom/")) | |
632 | data-directory)) | |
633 | (formats widget-image-conversion) | |
634 | file) | |
635 | (while (and formats (not file)) | |
0ce5b5d5 PA |
636 | (when (valid-image-instantiator-format-p (car (car formats))) |
637 | (setq file (locate-file image dirlist | |
638 | (mapconcat 'identity | |
639 | (cdr (car formats)) | |
640 | ":")))) | |
641 | (unless file | |
25ac13b5 | 642 | (setq formats (cdr formats)))) |
0ce5b5d5 PA |
643 | (and file |
644 | ;; We create a glyph with the file as the default image | |
645 | ;; instantiator, and the TAG fallback | |
646 | (make-glyph (list (vector (car (car formats)) ':file file) | |
647 | (vector 'string ':data tag)))))) | |
25ac13b5 PA |
648 | ((valid-instantiator-p image 'image) |
649 | ;; A valid image instantiator (e.g. [gif :file "somefile"] etc.) | |
3acab5ef PA |
650 | (make-glyph (list image |
651 | (vector 'string ':data tag)))) | |
0ce5b5d5 PA |
652 | ((consp image) |
653 | ;; This could be virtually anything. Let `make-glyph' sort it out. | |
654 | (make-glyph image)) | |
d543e20b | 655 | (t |
25ac13b5 | 656 | ;; Oh well. |
3acab5ef PA |
657 | nil))) |
658 | ||
659 | (defun widget-glyph-insert (widget tag image &optional down inactive) | |
660 | "In WIDGET, insert the text TAG or, if supported, IMAGE. | |
661 | IMAGE should either be a glyph, an image instantiator, or an image file | |
662 | name sans extension (xpm, xbm, gif, jpg, or png) located in | |
663 | `widget-glyph-directory'. | |
664 | ||
665 | Optional arguments DOWN and INACTIVE is used instead of IMAGE when the | |
666 | glyph is pressed or inactive, respectively. | |
667 | ||
668 | WARNING: If you call this with a glyph, and you want the user to be | |
669 | able to invoke the glyph, make sure it is unique. If you use the | |
670 | same glyph for multiple widgets, invoking any of the glyphs will | |
0ce5b5d5 PA |
671 | cause the last created widget to be invoked. |
672 | ||
673 | Instead of an instantiator, you can also use a list of instantiators, | |
674 | or whatever `make-glyph' will accept. However, in that case you must | |
675 | provide the fallback TAG as a part of the instantiator yourself." | |
3acab5ef PA |
676 | (let ((glyph (widget-glyph-find image tag))) |
677 | (if glyph | |
678 | (widget-glyph-insert-glyph widget | |
679 | glyph | |
680 | (widget-glyph-find down tag) | |
681 | (widget-glyph-find inactive tag)) | |
682 | (insert tag)))) | |
25ac13b5 PA |
683 | |
684 | (defun widget-glyph-insert-glyph (widget glyph &optional down inactive) | |
3acab5ef PA |
685 | "In WIDGET, insert GLYPH. |
686 | If optional arguments DOWN and INACTIVE are given, they should be | |
687 | glyphs used when the widget is pushed and inactive, respectively." | |
da5ec617 PA |
688 | (when widget |
689 | (set-glyph-property glyph 'widget widget) | |
690 | (when down | |
691 | (set-glyph-property down 'widget widget)) | |
692 | (when inactive | |
693 | (set-glyph-property inactive 'widget widget))) | |
d543e20b | 694 | (insert "*") |
3acab5ef | 695 | (let ((ext (make-extent (point) (1- (point)))) |
da5ec617 | 696 | (help-echo (and widget (widget-get widget :help-echo)))) |
3acab5ef | 697 | (set-extent-property ext 'invisible t) |
8697863a PA |
698 | (set-extent-property ext 'start-open t) |
699 | (set-extent-property ext 'end-open t) | |
3acab5ef PA |
700 | (set-extent-end-glyph ext glyph) |
701 | (when help-echo | |
702 | (set-extent-property ext 'balloon-help help-echo) | |
703 | (set-extent-property ext 'help-echo help-echo))) | |
da5ec617 PA |
704 | (when widget |
705 | (widget-put widget :glyph-up glyph) | |
706 | (when down (widget-put widget :glyph-down down)) | |
707 | (when inactive (widget-put widget :glyph-inactive inactive)))) | |
d543e20b | 708 | |
25ac13b5 PA |
709 | ;;; Buttons. |
710 | ||
711 | (defgroup widget-button nil | |
712 | "The look of various kinds of buttons." | |
713 | :group 'widgets) | |
714 | ||
715 | (defcustom widget-button-prefix "" | |
716 | "String used as prefix for buttons." | |
717 | :type 'string | |
3acab5ef | 718 | :group 'widget-button) |
25ac13b5 PA |
719 | |
720 | (defcustom widget-button-suffix "" | |
721 | "String used as suffix for buttons." | |
722 | :type 'string | |
3acab5ef | 723 | :group 'widget-button) |
25ac13b5 | 724 | |
d543e20b PA |
725 | ;;; Creating Widgets. |
726 | ||
727 | ;;;###autoload | |
728 | (defun widget-create (type &rest args) | |
729 | "Create widget of TYPE. | |
730 | The optional ARGS are additional keyword arguments." | |
731 | (let ((widget (apply 'widget-convert type args))) | |
732 | (widget-apply widget :create) | |
733 | widget)) | |
734 | ||
735 | (defun widget-create-child-and-convert (parent type &rest args) | |
736 | "As part of the widget PARENT, create a child widget TYPE. | |
737 | The child is converted, using the keyword arguments ARGS." | |
738 | (let ((widget (apply 'widget-convert type args))) | |
739 | (widget-put widget :parent parent) | |
740 | (unless (widget-get widget :indent) | |
741 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
742 | (or (widget-get widget :extra-offset) 0) | |
743 | (widget-get parent :offset)))) | |
744 | (widget-apply widget :create) | |
745 | widget)) | |
746 | ||
747 | (defun widget-create-child (parent type) | |
748 | "Create widget of TYPE." | |
ef3f635f | 749 | (let ((widget (copy-sequence type))) |
d543e20b PA |
750 | (widget-put widget :parent parent) |
751 | (unless (widget-get widget :indent) | |
752 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
753 | (or (widget-get widget :extra-offset) 0) | |
754 | (widget-get parent :offset)))) | |
755 | (widget-apply widget :create) | |
756 | widget)) | |
757 | ||
758 | (defun widget-create-child-value (parent type value) | |
759 | "Create widget of TYPE with value VALUE." | |
ef3f635f | 760 | (let ((widget (copy-sequence type))) |
d543e20b PA |
761 | (widget-put widget :value (widget-apply widget :value-to-internal value)) |
762 | (widget-put widget :parent parent) | |
763 | (unless (widget-get widget :indent) | |
764 | (widget-put widget :indent (+ (or (widget-get parent :indent) 0) | |
765 | (or (widget-get widget :extra-offset) 0) | |
766 | (widget-get parent :offset)))) | |
767 | (widget-apply widget :create) | |
768 | widget)) | |
769 | ||
770 | ;;;###autoload | |
771 | (defun widget-delete (widget) | |
772 | "Delete WIDGET." | |
773 | (widget-apply widget :delete)) | |
774 | ||
775 | (defun widget-convert (type &rest args) | |
776 | "Convert TYPE to a widget without inserting it in the buffer. | |
777 | The optional ARGS are additional keyword arguments." | |
778 | ;; Don't touch the type. | |
779 | (let* ((widget (if (symbolp type) | |
780 | (list type) | |
ef3f635f | 781 | (copy-sequence type))) |
d543e20b PA |
782 | (current widget) |
783 | (keys args)) | |
784 | ;; First set the :args keyword. | |
785 | (while (cdr current) ;Look in the type. | |
786 | (let ((next (car (cdr current)))) | |
787 | (if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:)) | |
788 | (setq current (cdr (cdr current))) | |
789 | (setcdr current (list :args (cdr current))) | |
790 | (setq current nil)))) | |
791 | (while args ;Look in the args. | |
792 | (let ((next (nth 0 args))) | |
793 | (if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:)) | |
794 | (setq args (nthcdr 2 args)) | |
795 | (widget-put widget :args args) | |
796 | (setq args nil)))) | |
797 | ;; Then Convert the widget. | |
798 | (setq type widget) | |
799 | (while type | |
800 | (let ((convert-widget (plist-get (cdr type) :convert-widget))) | |
801 | (if convert-widget | |
802 | (setq widget (funcall convert-widget widget)))) | |
803 | (setq type (get (car type) 'widget-type))) | |
804 | ;; Finally set the keyword args. | |
805 | (while keys | |
806 | (let ((next (nth 0 keys))) | |
807 | (if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:)) | |
808 | (progn | |
809 | (widget-put widget next (nth 1 keys)) | |
810 | (setq keys (nthcdr 2 keys))) | |
811 | (setq keys nil)))) | |
812 | ;; Convert the :value to internal format. | |
813 | (if (widget-member widget :value) | |
814 | (let ((value (widget-get widget :value))) | |
815 | (widget-put widget | |
816 | :value (widget-apply widget :value-to-internal value)))) | |
817 | ;; Return the newly create widget. | |
818 | widget)) | |
819 | ||
820 | (defun widget-insert (&rest args) | |
821 | "Call `insert' with ARGS and make the text read only." | |
822 | (let ((inhibit-read-only t) | |
c6753d66 | 823 | before-change-functions |
d543e20b PA |
824 | after-change-functions |
825 | (from (point))) | |
4ee1cf9f | 826 | (apply 'insert args))) |
d543e20b | 827 | |
8697863a PA |
828 | (defun widget-convert-text (type from to |
829 | &optional button-from button-to | |
830 | &rest args) | |
6aaedd12 | 831 | "Return a widget of type TYPE with endpoint FROM TO. |
8697863a | 832 | Optional ARGS are extra keyword arguments for TYPE. |
6aaedd12 PA |
833 | and TO will be used as the widgets end points. If optional arguments |
834 | BUTTON-FROM and BUTTON-TO are given, these will be used as the widgets | |
8697863a PA |
835 | button end points. |
836 | Optional ARGS are extra keyword arguments for TYPE." | |
837 | (let ((widget (apply 'widget-convert type :delete 'widget-leave-text args)) | |
6aaedd12 PA |
838 | (from (copy-marker from)) |
839 | (to (copy-marker to))) | |
6aaedd12 PA |
840 | (set-marker-insertion-type from t) |
841 | (set-marker-insertion-type to nil) | |
842 | (widget-put widget :from from) | |
843 | (widget-put widget :to to) | |
844 | (when button-from | |
845 | (widget-specify-button widget button-from button-to)) | |
846 | widget)) | |
847 | ||
8697863a | 848 | (defun widget-convert-button (type from to &rest args) |
6aaedd12 | 849 | "Return a widget of type TYPE with endpoint FROM TO. |
8697863a | 850 | Optional ARGS are extra keyword arguments for TYPE. |
6aaedd12 PA |
851 | No text will be inserted to the buffer, instead the text between FROM |
852 | and TO will be used as the widgets end points, as well as the widgets | |
853 | button end points." | |
8697863a PA |
854 | (apply 'widget-convert-text type from to from to args)) |
855 | ||
856 | (defun widget-leave-text (widget) | |
857 | "Remove markers and overlays from WIDGET and its children." | |
858 | (let ((from (widget-get widget :from)) | |
859 | (to (widget-get widget :to)) | |
860 | (button (widget-get widget :button-overlay)) | |
0f648ca2 | 861 | (sample (widget-get widget :sample-overlay)) |
4ee1cf9f | 862 | (doc (widget-get widget :doc-overlay)) |
8697863a PA |
863 | (field (widget-get widget :field-overlay)) |
864 | (children (widget-get widget :children))) | |
865 | (set-marker from nil) | |
866 | (set-marker to nil) | |
208920be PA |
867 | (when button |
868 | (delete-overlay button)) | |
0f648ca2 PA |
869 | (when sample |
870 | (delete-overlay sample)) | |
4ee1cf9f PA |
871 | (when doc |
872 | (delete-overlay doc)) | |
208920be PA |
873 | (when field |
874 | (delete-overlay field)) | |
8697863a | 875 | (mapcar 'widget-leave-text children))) |
6aaedd12 | 876 | |
d543e20b PA |
877 | ;;; Keymap and Commands. |
878 | ||
879 | (defvar widget-keymap nil | |
880 | "Keymap containing useful binding for buffers containing widgets. | |
881 | Recommended as a parent keymap for modes using widgets.") | |
882 | ||
883 | (unless widget-keymap | |
884 | (setq widget-keymap (make-sparse-keymap)) | |
d543e20b | 885 | (define-key widget-keymap "\t" 'widget-forward) |
d543e20b PA |
886 | (define-key widget-keymap [(shift tab)] 'widget-backward) |
887 | (define-key widget-keymap [backtab] 'widget-backward) | |
a3c88c59 | 888 | (if (string-match "XEmacs" emacs-version) |
d543e20b | 889 | (progn |
a3c88c59 PA |
890 | ;;Glyph support. |
891 | (define-key widget-keymap [button1] 'widget-button1-click) | |
892 | (define-key widget-keymap [button2] 'widget-button-click)) | |
d543e20b PA |
893 | (define-key widget-keymap [down-mouse-2] 'widget-button-click)) |
894 | (define-key widget-keymap "\C-m" 'widget-button-press)) | |
895 | ||
896 | (defvar widget-global-map global-map | |
897 | "Keymap used for events the widget does not handle themselves.") | |
898 | (make-variable-buffer-local 'widget-global-map) | |
899 | ||
900 | (defvar widget-field-keymap nil | |
901 | "Keymap used inside an editable field.") | |
902 | ||
903 | (unless widget-field-keymap | |
904 | (setq widget-field-keymap (copy-keymap widget-keymap)) | |
905 | (unless (string-match "XEmacs" (emacs-version)) | |
906 | (define-key widget-field-keymap [menu-bar] 'nil)) | |
0ce5b5d5 PA |
907 | (define-key widget-field-keymap "\C-k" 'widget-kill-line) |
908 | (define-key widget-field-keymap "\M-\t" 'widget-complete) | |
d543e20b PA |
909 | (define-key widget-field-keymap "\C-m" 'widget-field-activate) |
910 | (define-key widget-field-keymap "\C-a" 'widget-beginning-of-line) | |
911 | (define-key widget-field-keymap "\C-e" 'widget-end-of-line) | |
912 | (set-keymap-parent widget-field-keymap global-map)) | |
913 | ||
914 | (defvar widget-text-keymap nil | |
915 | "Keymap used inside a text field.") | |
916 | ||
917 | (unless widget-text-keymap | |
918 | (setq widget-text-keymap (copy-keymap widget-keymap)) | |
919 | (unless (string-match "XEmacs" (emacs-version)) | |
920 | (define-key widget-text-keymap [menu-bar] 'nil)) | |
921 | (define-key widget-text-keymap "\C-a" 'widget-beginning-of-line) | |
922 | (define-key widget-text-keymap "\C-e" 'widget-end-of-line) | |
923 | (set-keymap-parent widget-text-keymap global-map)) | |
924 | ||
925 | (defun widget-field-activate (pos &optional event) | |
25ac13b5 | 926 | "Invoke the ediable field at point." |
d543e20b | 927 | (interactive "@d") |
0a3a0b56 | 928 | (let ((field (get-char-property pos 'field))) |
d543e20b PA |
929 | (if field |
930 | (widget-apply-action field event) | |
931 | (call-interactively | |
932 | (lookup-key widget-global-map (this-command-keys)))))) | |
933 | ||
a3c88c59 PA |
934 | (defface widget-button-pressed-face |
935 | '((((class color)) | |
936 | (:foreground "red")) | |
937 | (t | |
938 | (:bold t :underline t))) | |
939 | "Face used for pressed buttons." | |
6aaedd12 | 940 | :group 'widget-faces) |
a3c88c59 | 941 | |
d543e20b | 942 | (defun widget-button-click (event) |
d6bc306b | 943 | "Invoke the button that the mouse is pointing at, and move there." |
d543e20b | 944 | (interactive "@e") |
d6bc306b | 945 | (mouse-set-point event) |
d543e20b PA |
946 | (cond ((and (fboundp 'event-glyph) |
947 | (event-glyph event)) | |
a3c88c59 PA |
948 | (widget-glyph-click event)) |
949 | ((widget-event-point event) | |
950 | (let* ((pos (widget-event-point event)) | |
0a3a0b56 | 951 | (button (get-char-property pos 'button))) |
d543e20b | 952 | (if button |
0a3a0b56 PA |
953 | (let* ((overlay (widget-get button :button-overlay)) |
954 | (face (overlay-get overlay 'face)) | |
0ce5b5d5 | 955 | (mouse-face (overlay-get overlay 'mouse-face))) |
a3c88c59 PA |
956 | (unwind-protect |
957 | (let ((track-mouse t)) | |
0a3a0b56 PA |
958 | (overlay-put overlay |
959 | 'face 'widget-button-pressed-face) | |
a3c88c59 PA |
960 | (overlay-put overlay |
961 | 'mouse-face 'widget-button-pressed-face) | |
962 | (unless (widget-apply button :mouse-down-action event) | |
963 | (while (not (button-release-event-p event)) | |
0ce5b5d5 | 964 | (setq event (widget-read-event) |
a3c88c59 PA |
965 | pos (widget-event-point event)) |
966 | (if (and pos | |
0a3a0b56 | 967 | (eq (get-char-property pos 'button) |
a3c88c59 PA |
968 | button)) |
969 | (progn | |
970 | (overlay-put overlay | |
971 | 'face | |
972 | 'widget-button-pressed-face) | |
973 | (overlay-put overlay | |
974 | 'mouse-face | |
975 | 'widget-button-pressed-face)) | |
0a3a0b56 PA |
976 | (overlay-put overlay 'face face) |
977 | (overlay-put overlay 'mouse-face mouse-face)))) | |
a3c88c59 | 978 | (when (and pos |
0a3a0b56 | 979 | (eq (get-char-property pos 'button) button)) |
a3c88c59 | 980 | (widget-apply-action button event))) |
0a3a0b56 PA |
981 | (overlay-put overlay 'face face) |
982 | (overlay-put overlay 'mouse-face mouse-face))) | |
da5ec617 PA |
983 | (let ((up t) |
984 | command) | |
0ce5b5d5 PA |
985 | ;; Find the global command to run, and check whether it |
986 | ;; is bound to an up event. | |
987 | (cond ((setq command ;down event | |
da5ec617 PA |
988 | (lookup-key widget-global-map [ button2 ])) |
989 | (setq up nil)) | |
0ce5b5d5 | 990 | ((setq command ;down event |
da5ec617 PA |
991 | (lookup-key widget-global-map [ down-mouse-2 ])) |
992 | (setq up nil)) | |
0ce5b5d5 | 993 | ((setq command ;up event |
da5ec617 | 994 | (lookup-key widget-global-map [ button2up ]))) |
0ce5b5d5 | 995 | ((setq command ;up event |
da5ec617 PA |
996 | (lookup-key widget-global-map [ mouse-2])))) |
997 | (when up | |
0ce5b5d5 | 998 | ;; Don't execute up events twice. |
da5ec617 PA |
999 | (while (not (button-release-event-p event)) |
1000 | (setq event (widget-read-event)))) | |
1001 | (when command | |
0ce5b5d5 | 1002 | (call-interactively command)))))) |
d543e20b PA |
1003 | (t |
1004 | (message "You clicked somewhere weird.")))) | |
1005 | ||
1006 | (defun widget-button1-click (event) | |
25ac13b5 | 1007 | "Invoke glyph below mouse pointer." |
d543e20b PA |
1008 | (interactive "@e") |
1009 | (if (and (fboundp 'event-glyph) | |
1010 | (event-glyph event)) | |
a3c88c59 | 1011 | (widget-glyph-click event) |
d543e20b PA |
1012 | (call-interactively (lookup-key widget-global-map (this-command-keys))))) |
1013 | ||
a3c88c59 PA |
1014 | (defun widget-glyph-click (event) |
1015 | "Handle click on a glyph." | |
1016 | (let* ((glyph (event-glyph event)) | |
1017 | (widget (glyph-property glyph 'widget)) | |
1018 | (extent (event-glyph-extent event)) | |
1019 | (down-glyph (or (and widget (widget-get widget :glyph-down)) glyph)) | |
1020 | (up-glyph (or (and widget (widget-get widget :glyph-up)) glyph)) | |
1021 | (last event)) | |
1022 | ;; Wait for the release. | |
1023 | (while (not (button-release-event-p last)) | |
1024 | (if (eq extent (event-glyph-extent last)) | |
1025 | (set-extent-property extent 'end-glyph down-glyph) | |
1026 | (set-extent-property extent 'end-glyph up-glyph)) | |
1027 | (setq last (next-event event))) | |
1028 | ;; Release glyph. | |
1029 | (when down-glyph | |
1030 | (set-extent-property extent 'end-glyph up-glyph)) | |
1031 | ;; Apply widget action. | |
1032 | (when (eq extent (event-glyph-extent last)) | |
1033 | (let ((widget (glyph-property (event-glyph event) 'widget))) | |
1034 | (cond ((null widget) | |
1035 | (message "You clicked on a glyph.")) | |
1036 | ((not (widget-apply widget :active)) | |
1037 | (message "This glyph is inactive.")) | |
1038 | (t | |
1039 | (widget-apply-action widget event))))))) | |
1040 | ||
d543e20b | 1041 | (defun widget-button-press (pos &optional event) |
25ac13b5 | 1042 | "Invoke button at POS." |
d543e20b | 1043 | (interactive "@d") |
0a3a0b56 | 1044 | (let ((button (get-char-property pos 'button))) |
d543e20b PA |
1045 | (if button |
1046 | (widget-apply-action button event) | |
1047 | (let ((command (lookup-key widget-global-map (this-command-keys)))) | |
1048 | (when (commandp command) | |
1049 | (call-interactively command)))))) | |
1050 | ||
8697863a PA |
1051 | (defun widget-tabable-at (&optional pos) |
1052 | "Return the tabable widget at POS, or nil. | |
1053 | POS defaults to the value of (point)." | |
1054 | (unless pos | |
1055 | (setq pos (point))) | |
1056 | (let ((widget (or (get-char-property (point) 'button) | |
1057 | (get-char-property (point) 'field)))) | |
1058 | (if widget | |
1059 | (let ((order (widget-get widget :tab-order))) | |
1060 | (if order | |
1061 | (if (>= order 0) | |
1062 | widget | |
1063 | nil) | |
1064 | widget)) | |
1065 | nil))) | |
1066 | ||
4ee1cf9f PA |
1067 | (defcustom widget-use-overlay-change (string-match "XEmacs" emacs-version) |
1068 | "If non-nil, use overlay change functions to tab around in the buffer. | |
1069 | This is much faster, but doesn't work reliably on Emacs 19.34." | |
1070 | :type 'boolean | |
1071 | :group 'widgets) | |
1072 | ||
d543e20b PA |
1073 | (defun widget-move (arg) |
1074 | "Move point to the ARG next field or button. | |
1075 | ARG may be negative to move backward." | |
0a3a0b56 | 1076 | (or (bobp) (> arg 0) (backward-char)) |
0ce5b5d5 | 1077 | (let ((pos (point)) |
0a3a0b56 | 1078 | (number arg) |
8697863a | 1079 | (old (widget-tabable-at)) |
0a3a0b56 PA |
1080 | new) |
1081 | ;; Forward. | |
1082 | (while (> arg 0) | |
4ee1cf9f PA |
1083 | (cond ((eobp) |
1084 | (goto-char (point-min))) | |
1085 | (widget-use-overlay-change | |
1086 | (goto-char (next-overlay-change (point)))) | |
1087 | (t | |
1088 | (forward-char 1))) | |
0a3a0b56 PA |
1089 | (and (eq pos (point)) |
1090 | (eq arg number) | |
1091 | (error "No buttons or fields found")) | |
8697863a | 1092 | (let ((new (widget-tabable-at))) |
0a3a0b56 PA |
1093 | (when new |
1094 | (unless (eq new old) | |
8697863a | 1095 | (setq arg (1- arg)) |
0a3a0b56 PA |
1096 | (setq old new))))) |
1097 | ;; Backward. | |
1098 | (while (< arg 0) | |
4ee1cf9f PA |
1099 | (cond ((bobp) |
1100 | (goto-char (point-max))) | |
1101 | (widget-use-overlay-change | |
1102 | (goto-char (previous-overlay-change (point)))) | |
1103 | (t | |
1104 | (backward-char 1))) | |
0a3a0b56 PA |
1105 | (and (eq pos (point)) |
1106 | (eq arg number) | |
1107 | (error "No buttons or fields found")) | |
8697863a | 1108 | (let ((new (widget-tabable-at))) |
0a3a0b56 PA |
1109 | (when new |
1110 | (unless (eq new old) | |
8697863a PA |
1111 | (setq arg (1+ arg)))))) |
1112 | (let ((new (widget-tabable-at))) | |
1113 | (while (eq (widget-tabable-at) new) | |
1114 | (backward-char))) | |
0ce5b5d5 PA |
1115 | (forward-char)) |
1116 | (widget-echo-help (point)) | |
1117 | (run-hooks 'widget-move-hook)) | |
d543e20b PA |
1118 | |
1119 | (defun widget-forward (arg) | |
1120 | "Move point to the next field or button. | |
1121 | With optional ARG, move across that many fields." | |
1122 | (interactive "p") | |
1123 | (run-hooks 'widget-forward-hook) | |
1124 | (widget-move arg)) | |
1125 | ||
1126 | (defun widget-backward (arg) | |
1127 | "Move point to the previous field or button. | |
1128 | With optional ARG, move across that many fields." | |
1129 | (interactive "p") | |
1130 | (run-hooks 'widget-backward-hook) | |
1131 | (widget-move (- arg))) | |
1132 | ||
1133 | (defun widget-beginning-of-line () | |
1134 | "Go to beginning of field or beginning of line, whichever is first." | |
1135 | (interactive) | |
0ce5b5d5 PA |
1136 | (let* ((field (widget-field-find (point))) |
1137 | (start (and field (widget-field-start field)))) | |
1138 | (if (and start (not (eq start (point)))) | |
1139 | (goto-char start) | |
4ee1cf9f PA |
1140 | (call-interactively 'beginning-of-line))) |
1141 | ;; XEmacs: preserve the region | |
1142 | (setq zmacs-region-stays t)) | |
d543e20b PA |
1143 | |
1144 | (defun widget-end-of-line () | |
1145 | "Go to end of field or end of line, whichever is first." | |
1146 | (interactive) | |
0ce5b5d5 PA |
1147 | (let* ((field (widget-field-find (point))) |
1148 | (end (and field (widget-field-end field)))) | |
1149 | (if (and end (not (eq end (point)))) | |
1150 | (goto-char end) | |
4ee1cf9f PA |
1151 | (call-interactively 'end-of-line))) |
1152 | ;; XEmacs: preserve the region | |
1153 | (setq zmacs-region-stays t)) | |
d543e20b PA |
1154 | |
1155 | (defun widget-kill-line () | |
1156 | "Kill to end of field or end of line, whichever is first." | |
1157 | (interactive) | |
0ce5b5d5 PA |
1158 | (let* ((field (widget-field-find (point))) |
1159 | (newline (save-excursion (forward-line 1) (point))) | |
1160 | (end (and field (widget-field-end field)))) | |
1161 | (if (and field (> newline end)) | |
1162 | (kill-region (point) end) | |
d543e20b PA |
1163 | (call-interactively 'kill-line)))) |
1164 | ||
0ce5b5d5 PA |
1165 | (defcustom widget-complete-field (lookup-key global-map "\M-\t") |
1166 | "Default function to call for completion inside fields." | |
1167 | :options '(ispell-complete-word complete-tag lisp-complete-symbol) | |
1168 | :type 'function | |
1169 | :group 'widgets) | |
1170 | ||
1171 | (defun widget-complete () | |
1172 | "Complete content of editable field from point. | |
1173 | When not inside a field, move to the previous button or field." | |
1174 | (interactive) | |
1175 | (let ((field (widget-field-find (point)))) | |
1176 | (if field | |
1177 | (widget-apply field :complete) | |
1178 | (error "Not in an editable field")))) | |
1179 | ||
d543e20b PA |
1180 | ;;; Setting up the buffer. |
1181 | ||
1182 | (defvar widget-field-new nil) | |
1183 | ;; List of all newly created editable fields in the buffer. | |
1184 | (make-variable-buffer-local 'widget-field-new) | |
1185 | ||
1186 | (defvar widget-field-list nil) | |
1187 | ;; List of all editable fields in the buffer. | |
1188 | (make-variable-buffer-local 'widget-field-list) | |
1189 | ||
1190 | (defun widget-setup () | |
1191 | "Setup current buffer so editing string widgets works." | |
1192 | (let ((inhibit-read-only t) | |
1193 | (after-change-functions nil) | |
c6753d66 | 1194 | before-change-functions |
d543e20b PA |
1195 | field) |
1196 | (while widget-field-new | |
1197 | (setq field (car widget-field-new) | |
1198 | widget-field-new (cdr widget-field-new) | |
1199 | widget-field-list (cons field widget-field-list)) | |
0a3a0b56 PA |
1200 | (let ((from (car (widget-get field :field-overlay))) |
1201 | (to (cdr (widget-get field :field-overlay)))) | |
6aaedd12 PA |
1202 | (widget-specify-field field |
1203 | (marker-position from) (marker-position to)) | |
0a3a0b56 PA |
1204 | (set-marker from nil) |
1205 | (set-marker to nil)))) | |
d543e20b | 1206 | (widget-clear-undo) |
4ee1cf9f | 1207 | (widget-add-change)) |
d543e20b PA |
1208 | |
1209 | (defvar widget-field-last nil) | |
1210 | ;; Last field containing point. | |
1211 | (make-variable-buffer-local 'widget-field-last) | |
1212 | ||
1213 | (defvar widget-field-was nil) | |
1214 | ;; The widget data before the change. | |
1215 | (make-variable-buffer-local 'widget-field-was) | |
1216 | ||
0a3a0b56 PA |
1217 | (defun widget-field-buffer (widget) |
1218 | "Return the start of WIDGET's editing field." | |
6aaedd12 PA |
1219 | (let ((overlay (widget-get widget :field-overlay))) |
1220 | (and overlay (overlay-buffer overlay)))) | |
0a3a0b56 PA |
1221 | |
1222 | (defun widget-field-start (widget) | |
1223 | "Return the start of WIDGET's editing field." | |
6aaedd12 PA |
1224 | (let ((overlay (widget-get widget :field-overlay))) |
1225 | (and overlay (overlay-start overlay)))) | |
0a3a0b56 PA |
1226 | |
1227 | (defun widget-field-end (widget) | |
1228 | "Return the end of WIDGET's editing field." | |
6aaedd12 PA |
1229 | (let ((overlay (widget-get widget :field-overlay))) |
1230 | ;; Don't subtract one if local-map works at the end of the overlay. | |
62f44662 PA |
1231 | (and overlay (if (or widget-field-add-space |
1232 | (null (widget-get widget :size))) | |
8697863a PA |
1233 | (1- (overlay-end overlay)) |
1234 | (overlay-end overlay))))) | |
0a3a0b56 | 1235 | |
d543e20b | 1236 | (defun widget-field-find (pos) |
0a3a0b56 PA |
1237 | "Return the field at POS. |
1238 | Unlike (get-char-property POS 'field) this, works with empty fields too." | |
d543e20b PA |
1239 | (let ((fields widget-field-list) |
1240 | field found) | |
1241 | (while fields | |
1242 | (setq field (car fields) | |
1243 | fields (cdr fields)) | |
0a3a0b56 PA |
1244 | (let ((start (widget-field-start field)) |
1245 | (end (widget-field-end field))) | |
1246 | (when (and (<= start pos) (<= pos end)) | |
1247 | (when found | |
1248 | (debug "Overlapping fields")) | |
1249 | (setq found field)))) | |
d543e20b PA |
1250 | found)) |
1251 | ||
4ee1cf9f | 1252 | (defun widget-before-change (from to) |
944c91b6 PA |
1253 | ;; This is how, for example, a variable changes its state to `modified'. |
1254 | ;; when it is being edited. | |
540a8bd2 RS |
1255 | (unless inhibit-read-only |
1256 | (let ((from-field (widget-field-find from)) | |
1257 | (to-field (widget-field-find to))) | |
1258 | (cond ((not (eq from-field to-field)) | |
1259 | (add-hook 'post-command-hook 'widget-add-change nil t) | |
1260 | (error "Change should be restricted to a single field")) | |
1261 | ((null from-field) | |
1262 | (add-hook 'post-command-hook 'widget-add-change nil t) | |
1263 | (error "Attempt to change text outside editable field")) | |
1264 | (widget-field-use-before-change | |
1265 | (condition-case nil | |
1266 | (widget-apply from-field :notify from-field) | |
1267 | (error (debug "Before Change")))))))) | |
4ee1cf9f PA |
1268 | |
1269 | (defun widget-add-change () | |
1270 | (make-local-hook 'post-command-hook) | |
1271 | (remove-hook 'post-command-hook 'widget-add-change t) | |
1272 | (make-local-hook 'before-change-functions) | |
1273 | (add-hook 'before-change-functions 'widget-before-change nil t) | |
1274 | (make-local-hook 'after-change-functions) | |
1275 | (add-hook 'after-change-functions 'widget-after-change nil t)) | |
c6753d66 | 1276 | |
d543e20b PA |
1277 | (defun widget-after-change (from to old) |
1278 | ;; Adjust field size and text properties. | |
1279 | (condition-case nil | |
1280 | (let ((field (widget-field-find from)) | |
0a3a0b56 PA |
1281 | (other (widget-field-find to))) |
1282 | (when field | |
1283 | (unless (eq field other) | |
1284 | (debug "Change in different fields")) | |
8697863a PA |
1285 | (let ((size (widget-get field :size)) |
1286 | (secret (widget-get field :secret))) | |
0a3a0b56 PA |
1287 | (when size |
1288 | (let ((begin (widget-field-start field)) | |
1289 | (end (widget-field-end field))) | |
1290 | (cond ((< (- end begin) size) | |
1291 | ;; Field too small. | |
1292 | (save-excursion | |
1293 | (goto-char end) | |
1294 | (insert-char ?\ (- (+ begin size) end)))) | |
1295 | ((> (- end begin) size) | |
1296 | ;; Field too large and | |
1297 | (if (or (< (point) (+ begin size)) | |
1298 | (> (point) end)) | |
1299 | ;; Point is outside extra space. | |
1300 | (setq begin (+ begin size)) | |
1301 | ;; Point is within the extra space. | |
1302 | (setq begin (point))) | |
1303 | (save-excursion | |
1304 | (goto-char end) | |
1305 | (while (and (eq (preceding-char) ?\ ) | |
1306 | (> (point) begin)) | |
8697863a PA |
1307 | (delete-backward-char 1))))))) |
1308 | (when secret | |
1309 | (let ((begin (widget-field-start field)) | |
1310 | (end (widget-field-end field))) | |
1311 | (when size | |
1312 | (while (and (> end begin) | |
1313 | (eq (char-after (1- end)) ?\ )) | |
1314 | (setq end (1- end)))) | |
1315 | (while (< begin end) | |
1316 | (let ((old (char-after begin))) | |
1317 | (unless (eq old secret) | |
1318 | (subst-char-in-region begin (1+ begin) old secret) | |
1319 | (put-text-property begin (1+ begin) 'secret old)) | |
944c91b6 PA |
1320 | (setq begin (1+ begin))))))) |
1321 | (widget-apply field :notify field))) | |
0a3a0b56 | 1322 | (error (debug "After Change")))) |
d543e20b PA |
1323 | |
1324 | ;;; Widget Functions | |
1325 | ;; | |
1326 | ;; These functions are used in the definition of multiple widgets. | |
1327 | ||
a3c88c59 PA |
1328 | (defun widget-parent-action (widget &optional event) |
1329 | "Tell :parent of WIDGET to handle the :action. | |
1330 | Optional EVENT is the event that triggered the action." | |
1331 | (widget-apply (widget-get widget :parent) :action event)) | |
1332 | ||
d543e20b PA |
1333 | (defun widget-children-value-delete (widget) |
1334 | "Delete all :children and :buttons in WIDGET." | |
1335 | (mapcar 'widget-delete (widget-get widget :children)) | |
1336 | (widget-put widget :children nil) | |
1337 | (mapcar 'widget-delete (widget-get widget :buttons)) | |
1338 | (widget-put widget :buttons nil)) | |
1339 | ||
a3c88c59 PA |
1340 | (defun widget-children-validate (widget) |
1341 | "All the :children must be valid." | |
1342 | (let ((children (widget-get widget :children)) | |
1343 | child found) | |
1344 | (while (and children (not found)) | |
1345 | (setq child (car children) | |
1346 | children (cdr children) | |
1347 | found (widget-apply child :validate))) | |
1348 | found)) | |
1349 | ||
d543e20b PA |
1350 | (defun widget-types-convert-widget (widget) |
1351 | "Convert :args as widget types in WIDGET." | |
1352 | (widget-put widget :args (mapcar 'widget-convert (widget-get widget :args))) | |
1353 | widget) | |
1354 | ||
a3c88c59 PA |
1355 | (defun widget-value-convert-widget (widget) |
1356 | "Initialize :value from :args in WIDGET." | |
1357 | (let ((args (widget-get widget :args))) | |
1358 | (when args | |
1359 | (widget-put widget :value (car args)) | |
1360 | ;; Don't convert :value here, as this is done in `widget-convert'. | |
1361 | ;; (widget-put widget :value (widget-apply widget | |
1362 | ;; :value-to-internal (car args))) | |
1363 | (widget-put widget :args nil))) | |
1364 | widget) | |
1365 | ||
1366 | (defun widget-value-value-get (widget) | |
1367 | "Return the :value property of WIDGET." | |
1368 | (widget-get widget :value)) | |
1369 | ||
d543e20b PA |
1370 | ;;; The `default' Widget. |
1371 | ||
1372 | (define-widget 'default nil | |
1373 | "Basic widget other widgets are derived from." | |
1374 | :value-to-internal (lambda (widget value) value) | |
1375 | :value-to-external (lambda (widget value) value) | |
25ac13b5 PA |
1376 | :button-prefix 'widget-button-prefix |
1377 | :button-suffix 'widget-button-suffix | |
0ce5b5d5 | 1378 | :complete 'widget-default-complete |
d543e20b PA |
1379 | :create 'widget-default-create |
1380 | :indent nil | |
1381 | :offset 0 | |
1382 | :format-handler 'widget-default-format-handler | |
1383 | :button-face-get 'widget-default-button-face-get | |
1384 | :sample-face-get 'widget-default-sample-face-get | |
1385 | :delete 'widget-default-delete | |
1386 | :value-set 'widget-default-value-set | |
1387 | :value-inline 'widget-default-value-inline | |
1388 | :menu-tag-get 'widget-default-menu-tag-get | |
1389 | :validate (lambda (widget) nil) | |
1390 | :active 'widget-default-active | |
1391 | :activate 'widget-specify-active | |
1392 | :deactivate 'widget-default-deactivate | |
a3c88c59 | 1393 | :mouse-down-action (lambda (widget event) nil) |
d543e20b | 1394 | :action 'widget-default-action |
6d528fc5 PA |
1395 | :notify 'widget-default-notify |
1396 | :prompt-value 'widget-default-prompt-value) | |
d543e20b | 1397 | |
0ce5b5d5 PA |
1398 | (defun widget-default-complete (widget) |
1399 | "Call the value of the :complete-function property of WIDGET. | |
1400 | If that does not exists, call the value of `widget-complete-field'." | |
1401 | (let ((fun (widget-get widget :complete-function))) | |
1402 | (call-interactively (or fun widget-complete-field)))) | |
1403 | ||
d543e20b PA |
1404 | (defun widget-default-create (widget) |
1405 | "Create WIDGET at point in the current buffer." | |
1406 | (widget-specify-insert | |
1407 | (let ((from (point)) | |
d543e20b PA |
1408 | button-begin button-end |
1409 | sample-begin sample-end | |
1410 | doc-begin doc-end | |
1411 | value-pos) | |
1412 | (insert (widget-get widget :format)) | |
1413 | (goto-char from) | |
1414 | ;; Parse escapes in format. | |
1415 | (while (re-search-forward "%\\(.\\)" nil t) | |
1416 | (let ((escape (aref (match-string 1) 0))) | |
1417 | (replace-match "" t t) | |
1418 | (cond ((eq escape ?%) | |
1419 | (insert "%")) | |
1420 | ((eq escape ?\[) | |
25ac13b5 | 1421 | (setq button-begin (point)) |
944c91b6 | 1422 | (insert (widget-get-indirect widget :button-prefix))) |
d543e20b | 1423 | ((eq escape ?\]) |
944c91b6 | 1424 | (insert (widget-get-indirect widget :button-suffix)) |
d543e20b PA |
1425 | (setq button-end (point))) |
1426 | ((eq escape ?\{) | |
1427 | (setq sample-begin (point))) | |
1428 | ((eq escape ?\}) | |
1429 | (setq sample-end (point))) | |
1430 | ((eq escape ?n) | |
1431 | (when (widget-get widget :indent) | |
1432 | (insert "\n") | |
1433 | (insert-char ? (widget-get widget :indent)))) | |
1434 | ((eq escape ?t) | |
25ac13b5 PA |
1435 | (let ((glyph (widget-get widget :tag-glyph)) |
1436 | (tag (widget-get widget :tag))) | |
1437 | (cond (glyph | |
1438 | (widget-glyph-insert widget (or tag "image") glyph)) | |
1439 | (tag | |
1440 | (insert tag)) | |
1441 | (t | |
1442 | (let ((standard-output (current-buffer))) | |
1443 | (princ (widget-get widget :value))))))) | |
d543e20b | 1444 | ((eq escape ?d) |
25ac13b5 PA |
1445 | (let ((doc (widget-get widget :doc))) |
1446 | (when doc | |
1447 | (setq doc-begin (point)) | |
1448 | (insert doc) | |
1449 | (while (eq (preceding-char) ?\n) | |
1450 | (delete-backward-char 1)) | |
1451 | (insert "\n") | |
1452 | (setq doc-end (point))))) | |
d543e20b PA |
1453 | ((eq escape ?v) |
1454 | (if (and button-begin (not button-end)) | |
1455 | (widget-apply widget :value-create) | |
1456 | (setq value-pos (point)))) | |
1457 | (t | |
1458 | (widget-apply widget :format-handler escape))))) | |
1459 | ;; Specify button, sample, and doc, and insert value. | |
1460 | (and button-begin button-end | |
1461 | (widget-specify-button widget button-begin button-end)) | |
1462 | (and sample-begin sample-end | |
1463 | (widget-specify-sample widget sample-begin sample-end)) | |
1464 | (and doc-begin doc-end | |
1465 | (widget-specify-doc widget doc-begin doc-end)) | |
1466 | (when value-pos | |
1467 | (goto-char value-pos) | |
1468 | (widget-apply widget :value-create))) | |
1469 | (let ((from (copy-marker (point-min))) | |
1470 | (to (copy-marker (point-max)))) | |
d543e20b PA |
1471 | (set-marker-insertion-type from t) |
1472 | (set-marker-insertion-type to nil) | |
1473 | (widget-put widget :from from) | |
6d528fc5 PA |
1474 | (widget-put widget :to to))) |
1475 | (widget-clear-undo)) | |
d543e20b PA |
1476 | |
1477 | (defun widget-default-format-handler (widget escape) | |
1478 | ;; We recognize the %h escape by default. | |
6aaedd12 | 1479 | (let* ((buttons (widget-get widget :buttons))) |
d543e20b | 1480 | (cond ((eq escape ?h) |
6aaedd12 PA |
1481 | (let* ((doc-property (widget-get widget :documentation-property)) |
1482 | (doc-try (cond ((widget-get widget :doc)) | |
1483 | ((symbolp doc-property) | |
1484 | (documentation-property | |
1485 | (widget-get widget :value) | |
1486 | doc-property)) | |
1487 | (t | |
1488 | (funcall doc-property | |
1489 | (widget-get widget :value))))) | |
1490 | (doc-text (and (stringp doc-try) | |
1491 | (> (length doc-try) 1) | |
8697863a PA |
1492 | doc-try)) |
1493 | (doc-indent (widget-get widget :documentation-indent))) | |
6aaedd12 PA |
1494 | (when doc-text |
1495 | (and (eq (preceding-char) ?\n) | |
1496 | (widget-get widget :indent) | |
1497 | (insert-char ? (widget-get widget :indent))) | |
1498 | ;; The `*' in the beginning is redundant. | |
1499 | (when (eq (aref doc-text 0) ?*) | |
1500 | (setq doc-text (substring doc-text 1))) | |
1501 | ;; Get rid of trailing newlines. | |
1502 | (when (string-match "\n+\\'" doc-text) | |
1503 | (setq doc-text (substring doc-text 0 (match-beginning 0)))) | |
1504 | (push (widget-create-child-and-convert | |
1505 | widget 'documentation-string | |
8697863a PA |
1506 | :indent (cond ((numberp doc-indent ) |
1507 | doc-indent) | |
1508 | ((null doc-indent) | |
1509 | nil) | |
1510 | (t 0)) | |
6aaedd12 PA |
1511 | doc-text) |
1512 | buttons)))) | |
d543e20b PA |
1513 | (t |
1514 | (error "Unknown escape `%c'" escape))) | |
1515 | (widget-put widget :buttons buttons))) | |
1516 | ||
1517 | (defun widget-default-button-face-get (widget) | |
1518 | ;; Use :button-face or widget-button-face | |
0b296dac RS |
1519 | (or (widget-get widget :button-face) |
1520 | (let ((parent (widget-get widget :parent))) | |
1521 | (if parent | |
1522 | (widget-apply parent :button-face-get) | |
2f477381 | 1523 | widget-button-face)))) |
d543e20b PA |
1524 | |
1525 | (defun widget-default-sample-face-get (widget) | |
1526 | ;; Use :sample-face. | |
1527 | (widget-get widget :sample-face)) | |
1528 | ||
1529 | (defun widget-default-delete (widget) | |
1530 | ;; Remove widget from the buffer. | |
1531 | (let ((from (widget-get widget :from)) | |
1532 | (to (widget-get widget :to)) | |
9097aeb7 PA |
1533 | (inactive-overlay (widget-get widget :inactive)) |
1534 | (button-overlay (widget-get widget :button-overlay)) | |
0f648ca2 | 1535 | (sample-overlay (widget-get widget :sample-overlay)) |
4ee1cf9f | 1536 | (doc-overlay (widget-get widget :doc-overlay)) |
c6753d66 | 1537 | before-change-functions |
0a3a0b56 PA |
1538 | after-change-functions |
1539 | (inhibit-read-only t)) | |
d543e20b | 1540 | (widget-apply widget :value-delete) |
9097aeb7 PA |
1541 | (when inactive-overlay |
1542 | (delete-overlay inactive-overlay)) | |
1543 | (when button-overlay | |
1544 | (delete-overlay button-overlay)) | |
0f648ca2 PA |
1545 | (when sample-overlay |
1546 | (delete-overlay sample-overlay)) | |
4ee1cf9f PA |
1547 | (when doc-overlay |
1548 | (delete-overlay doc-overlay)) | |
d543e20b PA |
1549 | (when (< from to) |
1550 | ;; Kludge: this doesn't need to be true for empty formats. | |
1551 | (delete-region from to)) | |
1552 | (set-marker from nil) | |
6d528fc5 PA |
1553 | (set-marker to nil)) |
1554 | (widget-clear-undo)) | |
d543e20b PA |
1555 | |
1556 | (defun widget-default-value-set (widget value) | |
1557 | ;; Recreate widget with new value. | |
d0acc4ea RS |
1558 | (let* ((old-pos (point)) |
1559 | (from (copy-marker (widget-get widget :from))) | |
1560 | (to (copy-marker (widget-get widget :to))) | |
1561 | (offset (if (and (<= from old-pos) (<= old-pos to)) | |
1562 | (if (>= old-pos (1- to)) | |
1563 | (- old-pos to 1) | |
1564 | (- old-pos from))))) | |
1565 | ;;??? Bug: this ought to insert the new value before deleting the old one, | |
1566 | ;; so that markers on either side of the value automatically | |
1567 | ;; stay on the same side. -- rms. | |
1568 | (save-excursion | |
1569 | (goto-char (widget-get widget :from)) | |
1570 | (widget-apply widget :delete) | |
1571 | (widget-put widget :value value) | |
1572 | (widget-apply widget :create)) | |
1573 | (if offset | |
1574 | (if (< offset 0) | |
1575 | (goto-char (+ (widget-get widget :to) offset 1)) | |
1576 | (goto-char (min (+ from offset) (1- (widget-get widget :to)))))))) | |
d543e20b PA |
1577 | |
1578 | (defun widget-default-value-inline (widget) | |
1579 | ;; Wrap value in a list unless it is inline. | |
1580 | (if (widget-get widget :inline) | |
1581 | (widget-value widget) | |
1582 | (list (widget-value widget)))) | |
1583 | ||
1584 | (defun widget-default-menu-tag-get (widget) | |
1585 | ;; Use tag or value for menus. | |
1586 | (or (widget-get widget :menu-tag) | |
1587 | (widget-get widget :tag) | |
1588 | (widget-princ-to-string (widget-get widget :value)))) | |
1589 | ||
1590 | (defun widget-default-active (widget) | |
1591 | "Return t iff this widget active (user modifiable)." | |
1592 | (and (not (widget-get widget :inactive)) | |
1593 | (let ((parent (widget-get widget :parent))) | |
1594 | (or (null parent) | |
1595 | (widget-apply parent :active))))) | |
1596 | ||
1597 | (defun widget-default-deactivate (widget) | |
1598 | "Make WIDGET inactive for user modifications." | |
1599 | (widget-specify-inactive widget | |
1600 | (widget-get widget :from) | |
1601 | (widget-get widget :to))) | |
1602 | ||
1603 | (defun widget-default-action (widget &optional event) | |
1604 | ;; Notify the parent when a widget change | |
1605 | (let ((parent (widget-get widget :parent))) | |
1606 | (when parent | |
1607 | (widget-apply parent :notify widget event)))) | |
1608 | ||
1609 | (defun widget-default-notify (widget child &optional event) | |
1610 | ;; Pass notification to parent. | |
1611 | (widget-default-action widget event)) | |
1612 | ||
6d528fc5 PA |
1613 | (defun widget-default-prompt-value (widget prompt value unbound) |
1614 | ;; Read an arbitrary value. Stolen from `set-variable'. | |
1615 | ;; (let ((initial (if unbound | |
1616 | ;; nil | |
1617 | ;; ;; It would be nice if we could do a `(cons val 1)' here. | |
1618 | ;; (prin1-to-string (custom-quote value)))))) | |
1619 | (eval-minibuffer prompt )) | |
1620 | ||
d543e20b PA |
1621 | ;;; The `item' Widget. |
1622 | ||
1623 | (define-widget 'item 'default | |
1624 | "Constant items for inclusion in other widgets." | |
a3c88c59 | 1625 | :convert-widget 'widget-value-convert-widget |
d543e20b PA |
1626 | :value-create 'widget-item-value-create |
1627 | :value-delete 'ignore | |
a3c88c59 | 1628 | :value-get 'widget-value-value-get |
d543e20b PA |
1629 | :match 'widget-item-match |
1630 | :match-inline 'widget-item-match-inline | |
1631 | :action 'widget-item-action | |
1632 | :format "%t\n") | |
1633 | ||
d543e20b PA |
1634 | (defun widget-item-value-create (widget) |
1635 | ;; Insert the printed representation of the value. | |
1636 | (let ((standard-output (current-buffer))) | |
1637 | (princ (widget-get widget :value)))) | |
1638 | ||
1639 | (defun widget-item-match (widget value) | |
1640 | ;; Match if the value is the same. | |
1641 | (equal (widget-get widget :value) value)) | |
1642 | ||
1643 | (defun widget-item-match-inline (widget values) | |
1644 | ;; Match if the value is the same. | |
1645 | (let ((value (widget-get widget :value))) | |
1646 | (and (listp value) | |
1647 | (<= (length value) (length values)) | |
e5dfabb4 | 1648 | (let ((head (widget-sublist values 0 (length value)))) |
d543e20b | 1649 | (and (equal head value) |
e5dfabb4 RS |
1650 | (cons head (widget-sublist values (length value)))))))) |
1651 | ||
1652 | (defun widget-sublist (list start &optional end) | |
1653 | "Return the sublist of LIST from START to END. | |
1654 | If END is omitted, it defaults to the length of LIST." | |
0a3a0b56 PA |
1655 | (if (> start 0) (setq list (nthcdr start list))) |
1656 | (if end | |
1657 | (if (<= end start) | |
1658 | nil | |
1659 | (setq list (copy-sequence list)) | |
1660 | (setcdr (nthcdr (- end start 1) list) nil) | |
1661 | list) | |
1662 | (copy-sequence list))) | |
d543e20b PA |
1663 | |
1664 | (defun widget-item-action (widget &optional event) | |
1665 | ;; Just notify itself. | |
1666 | (widget-apply widget :notify widget event)) | |
1667 | ||
d543e20b PA |
1668 | ;;; The `push-button' Widget. |
1669 | ||
1670 | (defcustom widget-push-button-gui t | |
1671 | "If non nil, use GUI push buttons when available." | |
1672 | :group 'widgets | |
1673 | :type 'boolean) | |
1674 | ||
1675 | ;; Cache already created GUI objects. | |
1676 | (defvar widget-push-button-cache nil) | |
1677 | ||
25ac13b5 PA |
1678 | (defcustom widget-push-button-prefix "[" |
1679 | "String used as prefix for buttons." | |
1680 | :type 'string | |
1681 | :group 'widget-button) | |
1682 | ||
1683 | (defcustom widget-push-button-suffix "]" | |
1684 | "String used as suffix for buttons." | |
1685 | :type 'string | |
1686 | :group 'widget-button) | |
1687 | ||
d543e20b PA |
1688 | (define-widget 'push-button 'item |
1689 | "A pushable button." | |
25ac13b5 PA |
1690 | :button-prefix "" |
1691 | :button-suffix "" | |
d543e20b PA |
1692 | :value-create 'widget-push-button-value-create |
1693 | :format "%[%v%]") | |
1694 | ||
1695 | (defun widget-push-button-value-create (widget) | |
1696 | ;; Insert text representing the `on' and `off' states. | |
1697 | (let* ((tag (or (widget-get widget :tag) | |
1698 | (widget-get widget :value))) | |
da5ec617 | 1699 | (tag-glyph (widget-get widget :tag-glyph)) |
25ac13b5 PA |
1700 | (text (concat widget-push-button-prefix |
1701 | tag widget-push-button-suffix)) | |
d543e20b | 1702 | (gui (cdr (assoc tag widget-push-button-cache)))) |
da5ec617 PA |
1703 | (cond (tag-glyph |
1704 | (widget-glyph-insert widget text tag-glyph)) | |
1705 | ((and (fboundp 'make-gui-button) | |
d543e20b PA |
1706 | (fboundp 'make-glyph) |
1707 | widget-push-button-gui | |
1708 | (fboundp 'device-on-window-system-p) | |
1709 | (device-on-window-system-p) | |
1710 | (string-match "XEmacs" emacs-version)) | |
da5ec617 PA |
1711 | (unless gui |
1712 | (setq gui (make-gui-button tag 'widget-gui-action widget)) | |
1713 | (push (cons tag gui) widget-push-button-cache)) | |
1714 | (widget-glyph-insert-glyph widget | |
1715 | (make-glyph | |
1716 | (list (nth 0 (aref gui 1)) | |
1717 | (vector 'string ':data text))) | |
1718 | (make-glyph | |
1719 | (list (nth 1 (aref gui 1)) | |
1720 | (vector 'string ':data text))) | |
1721 | (make-glyph | |
1722 | (list (nth 2 (aref gui 1)) | |
1723 | (vector 'string ':data text))))) | |
1724 | (t | |
1725 | (insert text))))) | |
d543e20b PA |
1726 | |
1727 | (defun widget-gui-action (widget) | |
1728 | "Apply :action for WIDGET." | |
1729 | (widget-apply-action widget (this-command-keys))) | |
1730 | ||
1731 | ;;; The `link' Widget. | |
1732 | ||
25ac13b5 PA |
1733 | (defcustom widget-link-prefix "[" |
1734 | "String used as prefix for links." | |
1735 | :type 'string | |
1736 | :group 'widget-button) | |
1737 | ||
1738 | (defcustom widget-link-suffix "]" | |
1739 | "String used as suffix for links." | |
1740 | :type 'string | |
1741 | :group 'widget-button) | |
1742 | ||
d543e20b PA |
1743 | (define-widget 'link 'item |
1744 | "An embedded link." | |
25ac13b5 PA |
1745 | :button-prefix 'widget-link-prefix |
1746 | :button-suffix 'widget-link-suffix | |
d543e20b | 1747 | :help-echo "Follow the link." |
25ac13b5 | 1748 | :format "%[%t%]") |
d543e20b PA |
1749 | |
1750 | ;;; The `info-link' Widget. | |
1751 | ||
1752 | (define-widget 'info-link 'link | |
1753 | "A link to an info file." | |
1754 | :action 'widget-info-link-action) | |
1755 | ||
1756 | (defun widget-info-link-action (widget &optional event) | |
1757 | "Open the info node specified by WIDGET." | |
a3c88c59 | 1758 | (Info-goto-node (widget-value widget))) |
d543e20b PA |
1759 | |
1760 | ;;; The `url-link' Widget. | |
1761 | ||
1762 | (define-widget 'url-link 'link | |
1763 | "A link to an www page." | |
1764 | :action 'widget-url-link-action) | |
1765 | ||
1766 | (defun widget-url-link-action (widget &optional event) | |
1767 | "Open the url specified by WIDGET." | |
1768 | (require 'browse-url) | |
1769 | (funcall browse-url-browser-function (widget-value widget))) | |
1770 | ||
a59b7025 KH |
1771 | ;;; The `function-link' Widget. |
1772 | ||
1773 | (define-widget 'function-link 'link | |
1774 | "A link to an Emacs function." | |
1775 | :action 'widget-function-link-action) | |
1776 | ||
1777 | (defun widget-function-link-action (widget &optional event) | |
1778 | "Show the function specified by WIDGET." | |
1779 | (describe-function (widget-value widget))) | |
1780 | ||
1781 | ;;; The `variable-link' Widget. | |
1782 | ||
1783 | (define-widget 'variable-link 'link | |
1784 | "A link to an Emacs variable." | |
1785 | :action 'widget-variable-link-action) | |
1786 | ||
1787 | (defun widget-variable-link-action (widget &optional event) | |
1788 | "Show the variable specified by WIDGET." | |
1789 | (describe-variable (widget-value widget))) | |
1790 | ||
62f44662 PA |
1791 | ;;; The `file-link' Widget. |
1792 | ||
1793 | (define-widget 'file-link 'link | |
1794 | "A link to a file." | |
1795 | :action 'widget-file-link-action) | |
1796 | ||
1797 | (defun widget-file-link-action (widget &optional event) | |
1798 | "Find the file specified by WIDGET." | |
1799 | (find-file (widget-value widget))) | |
1800 | ||
1801 | ;;; The `emacs-library-link' Widget. | |
1802 | ||
1803 | (define-widget 'emacs-library-link 'link | |
1804 | "A link to an Emacs Lisp library file." | |
1805 | :action 'widget-emacs-library-link-action) | |
1806 | ||
1807 | (defun widget-emacs-library-link-action (widget &optional event) | |
1808 | "Find the Emacs Library file specified by WIDGET." | |
1809 | (find-file (locate-library (widget-value widget)))) | |
1810 | ||
4ee1cf9f PA |
1811 | ;;; The `emacs-commentary-link' Widget. |
1812 | ||
1813 | (define-widget 'emacs-commentary-link 'link | |
1814 | "A link to Commentary in an Emacs Lisp library file." | |
1815 | :action 'widget-emacs-commentary-link-action) | |
1816 | ||
1817 | (defun widget-emacs-commentary-link-action (widget &optional event) | |
1818 | "Find the Commentary section of the Emacs file specified by WIDGET." | |
1819 | (finder-commentary (widget-value widget))) | |
1820 | ||
d543e20b PA |
1821 | ;;; The `editable-field' Widget. |
1822 | ||
1823 | (define-widget 'editable-field 'default | |
1824 | "An editable text field." | |
a3c88c59 | 1825 | :convert-widget 'widget-value-convert-widget |
d543e20b PA |
1826 | :keymap widget-field-keymap |
1827 | :format "%v" | |
1828 | :value "" | |
a3c88c59 PA |
1829 | :prompt-internal 'widget-field-prompt-internal |
1830 | :prompt-history 'widget-field-history | |
1831 | :prompt-value 'widget-field-prompt-value | |
d543e20b PA |
1832 | :action 'widget-field-action |
1833 | :validate 'widget-field-validate | |
1834 | :valid-regexp "" | |
1835 | :error "No match" | |
1836 | :value-create 'widget-field-value-create | |
1837 | :value-delete 'widget-field-value-delete | |
1838 | :value-get 'widget-field-value-get | |
1839 | :match 'widget-field-match) | |
1840 | ||
a3c88c59 PA |
1841 | (defvar widget-field-history nil |
1842 | "History of field minibuffer edits.") | |
1843 | ||
1844 | (defun widget-field-prompt-internal (widget prompt initial history) | |
1845 | ;; Read string for WIDGET promptinhg with PROMPT. | |
1846 | ;; INITIAL is the initial input and HISTORY is a symbol containing | |
1847 | ;; the earlier input. | |
1848 | (read-string prompt initial history)) | |
1849 | ||
1850 | (defun widget-field-prompt-value (widget prompt value unbound) | |
1851 | ;; Prompt for a string. | |
1852 | (let ((initial (if unbound | |
1853 | nil | |
1854 | (cons (widget-apply widget :value-to-internal | |
1855 | value) 0))) | |
1856 | (history (widget-get widget :prompt-history))) | |
1857 | (let ((answer (widget-apply widget | |
1858 | :prompt-internal prompt initial history))) | |
1859 | (widget-apply widget :value-to-external answer)))) | |
d543e20b | 1860 | |
0b296dac | 1861 | (defvar widget-edit-functions nil) |
211c9fe9 | 1862 | |
d543e20b | 1863 | (defun widget-field-action (widget &optional event) |
f1231b8e RS |
1864 | ;; Move to next field. |
1865 | (widget-forward 1) | |
0b296dac | 1866 | (run-hook-with-args 'widget-edit-functions widget)) |
d543e20b PA |
1867 | |
1868 | (defun widget-field-validate (widget) | |
1869 | ;; Valid if the content matches `:valid-regexp'. | |
1870 | (save-excursion | |
1871 | (let ((value (widget-apply widget :value-get)) | |
1872 | (regexp (widget-get widget :valid-regexp))) | |
1873 | (if (string-match regexp value) | |
1874 | nil | |
1875 | widget)))) | |
1876 | ||
1877 | (defun widget-field-value-create (widget) | |
1878 | ;; Create an editable text field. | |
d543e20b PA |
1879 | (let ((size (widget-get widget :size)) |
1880 | (value (widget-get widget :value)) | |
0a3a0b56 | 1881 | (from (point)) |
c953515e PA |
1882 | ;; This is changed to a real overlay in `widget-setup'. We |
1883 | ;; need the end points to behave differently until | |
1884 | ;; `widget-setup' is called. | |
0a3a0b56 PA |
1885 | (overlay (cons (make-marker) (make-marker)))) |
1886 | (widget-put widget :field-overlay overlay) | |
d543e20b PA |
1887 | (insert value) |
1888 | (and size | |
1889 | (< (length value) size) | |
1890 | (insert-char ?\ (- size (length value)))) | |
1891 | (unless (memq widget widget-field-list) | |
1892 | (setq widget-field-new (cons widget widget-field-new))) | |
0a3a0b56 PA |
1893 | (move-marker (cdr overlay) (point)) |
1894 | (set-marker-insertion-type (cdr overlay) nil) | |
1895 | (when (null size) | |
1896 | (insert ?\n)) | |
1897 | (move-marker (car overlay) from) | |
1898 | (set-marker-insertion-type (car overlay) t))) | |
d543e20b PA |
1899 | |
1900 | (defun widget-field-value-delete (widget) | |
1901 | ;; Remove the widget from the list of active editing fields. | |
1902 | (setq widget-field-list (delq widget widget-field-list)) | |
1903 | ;; These are nil if the :format string doesn't contain `%v'. | |
0a3a0b56 PA |
1904 | (let ((overlay (widget-get widget :field-overlay))) |
1905 | (when overlay | |
1906 | (delete-overlay overlay)))) | |
d543e20b PA |
1907 | |
1908 | (defun widget-field-value-get (widget) | |
1909 | ;; Return current text in editing field. | |
0a3a0b56 PA |
1910 | (let ((from (widget-field-start widget)) |
1911 | (to (widget-field-end widget)) | |
1912 | (buffer (widget-field-buffer widget)) | |
d543e20b PA |
1913 | (size (widget-get widget :size)) |
1914 | (secret (widget-get widget :secret)) | |
1915 | (old (current-buffer))) | |
1916 | (if (and from to) | |
1917 | (progn | |
0a3a0b56 | 1918 | (set-buffer buffer) |
d543e20b PA |
1919 | (while (and size |
1920 | (not (zerop size)) | |
1921 | (> to from) | |
1922 | (eq (char-after (1- to)) ?\ )) | |
1923 | (setq to (1- to))) | |
1924 | (let ((result (buffer-substring-no-properties from to))) | |
1925 | (when secret | |
1926 | (let ((index 0)) | |
1927 | (while (< (+ from index) to) | |
1928 | (aset result index | |
0a3a0b56 | 1929 | (get-char-property (+ from index) 'secret)) |
d543e20b PA |
1930 | (setq index (1+ index))))) |
1931 | (set-buffer old) | |
1932 | result)) | |
1933 | (widget-get widget :value)))) | |
1934 | ||
1935 | (defun widget-field-match (widget value) | |
1936 | ;; Match any string. | |
1937 | (stringp value)) | |
1938 | ||
1939 | ;;; The `text' Widget. | |
1940 | ||
1941 | (define-widget 'text 'editable-field | |
1942 | :keymap widget-text-keymap | |
1943 | "A multiline text area.") | |
1944 | ||
1945 | ;;; The `menu-choice' Widget. | |
1946 | ||
1947 | (define-widget 'menu-choice 'default | |
1948 | "A menu of options." | |
1949 | :convert-widget 'widget-types-convert-widget | |
1950 | :format "%[%t%]: %v" | |
1951 | :case-fold t | |
1952 | :tag "choice" | |
1953 | :void '(item :format "invalid (%t)\n") | |
1954 | :value-create 'widget-choice-value-create | |
1955 | :value-delete 'widget-children-value-delete | |
1956 | :value-get 'widget-choice-value-get | |
1957 | :value-inline 'widget-choice-value-inline | |
a3c88c59 | 1958 | :mouse-down-action 'widget-choice-mouse-down-action |
d543e20b PA |
1959 | :action 'widget-choice-action |
1960 | :error "Make a choice" | |
1961 | :validate 'widget-choice-validate | |
1962 | :match 'widget-choice-match | |
1963 | :match-inline 'widget-choice-match-inline) | |
1964 | ||
1965 | (defun widget-choice-value-create (widget) | |
1966 | ;; Insert the first choice that matches the value. | |
1967 | (let ((value (widget-get widget :value)) | |
1968 | (args (widget-get widget :args)) | |
1969 | current) | |
1970 | (while args | |
1971 | (setq current (car args) | |
1972 | args (cdr args)) | |
1973 | (when (widget-apply current :match value) | |
1974 | (widget-put widget :children (list (widget-create-child-value | |
1975 | widget current value))) | |
1976 | (widget-put widget :choice current) | |
1977 | (setq args nil | |
1978 | current nil))) | |
1979 | (when current | |
1980 | (let ((void (widget-get widget :void))) | |
1981 | (widget-put widget :children (list (widget-create-child-and-convert | |
1982 | widget void :value value))) | |
1983 | (widget-put widget :choice void))))) | |
1984 | ||
1985 | (defun widget-choice-value-get (widget) | |
1986 | ;; Get value of the child widget. | |
1987 | (widget-value (car (widget-get widget :children)))) | |
1988 | ||
1989 | (defun widget-choice-value-inline (widget) | |
1990 | ;; Get value of the child widget. | |
1991 | (widget-apply (car (widget-get widget :children)) :value-inline)) | |
1992 | ||
a3c88c59 PA |
1993 | (defcustom widget-choice-toggle nil |
1994 | "If non-nil, a binary choice will just toggle between the values. | |
1995 | Otherwise, the user will explicitly have to choose between the values | |
25ac13b5 | 1996 | when he invoked the menu." |
a3c88c59 PA |
1997 | :type 'boolean |
1998 | :group 'widgets) | |
1999 | ||
2000 | (defun widget-choice-mouse-down-action (widget &optional event) | |
2001 | ;; Return non-nil if we need a menu. | |
2002 | (let ((args (widget-get widget :args)) | |
2003 | (old (widget-get widget :choice))) | |
2004 | (cond ((not window-system) | |
2005 | ;; No place to pop up a menu. | |
2006 | nil) | |
2007 | ((not (or (fboundp 'x-popup-menu) (fboundp 'popup-menu))) | |
2008 | ;; No way to pop up a menu. | |
2009 | nil) | |
2010 | ((< (length args) 2) | |
2011 | ;; Empty or singleton list, just return the value. | |
2012 | nil) | |
2013 | ((> (length args) widget-menu-max-size) | |
2014 | ;; Too long, prompt. | |
2015 | nil) | |
2016 | ((> (length args) 2) | |
2017 | ;; Reasonable sized list, use menu. | |
2018 | t) | |
2019 | ((and widget-choice-toggle (memq old args)) | |
2020 | ;; We toggle. | |
2021 | nil) | |
2022 | (t | |
2023 | ;; Ask which of the two. | |
2024 | t)))) | |
2025 | ||
d543e20b PA |
2026 | (defun widget-choice-action (widget &optional event) |
2027 | ;; Make a choice. | |
2028 | (let ((args (widget-get widget :args)) | |
2029 | (old (widget-get widget :choice)) | |
2030 | (tag (widget-apply widget :menu-tag-get)) | |
2031 | (completion-ignore-case (widget-get widget :case-fold)) | |
2032 | current choices) | |
2033 | ;; Remember old value. | |
2034 | (if (and old (not (widget-apply widget :validate))) | |
2035 | (let* ((external (widget-value widget)) | |
2036 | (internal (widget-apply old :value-to-internal external))) | |
2037 | (widget-put old :value internal))) | |
2038 | ;; Find new choice. | |
2039 | (setq current | |
2040 | (cond ((= (length args) 0) | |
2041 | nil) | |
2042 | ((= (length args) 1) | |
2043 | (nth 0 args)) | |
a3c88c59 PA |
2044 | ((and widget-choice-toggle |
2045 | (= (length args) 2) | |
d543e20b PA |
2046 | (memq old args)) |
2047 | (if (eq old (nth 0 args)) | |
2048 | (nth 1 args) | |
2049 | (nth 0 args))) | |
2050 | (t | |
2051 | (while args | |
2052 | (setq current (car args) | |
2053 | args (cdr args)) | |
2054 | (setq choices | |
2055 | (cons (cons (widget-apply current :menu-tag-get) | |
2056 | current) | |
2057 | choices))) | |
2058 | (widget-choose tag (reverse choices) event)))) | |
d0acc4ea RS |
2059 | (when current |
2060 | (widget-value-set widget | |
2061 | (widget-apply current :value-to-external | |
2062 | (widget-get current :value))) | |
2063 | (widget-setup) | |
2064 | (widget-apply widget :notify widget event))) | |
d4b8422f | 2065 | (run-hook-with-args 'widget-edit-functions widget)) |
d543e20b PA |
2066 | |
2067 | (defun widget-choice-validate (widget) | |
2068 | ;; Valid if we have made a valid choice. | |
2069 | (let ((void (widget-get widget :void)) | |
2070 | (choice (widget-get widget :choice)) | |
2071 | (child (car (widget-get widget :children)))) | |
2072 | (if (eq void choice) | |
2073 | widget | |
2074 | (widget-apply child :validate)))) | |
2075 | ||
2076 | (defun widget-choice-match (widget value) | |
2077 | ;; Matches if one of the choices matches. | |
2078 | (let ((args (widget-get widget :args)) | |
2079 | current found) | |
2080 | (while (and args (not found)) | |
2081 | (setq current (car args) | |
2082 | args (cdr args) | |
2083 | found (widget-apply current :match value))) | |
2084 | found)) | |
2085 | ||
2086 | (defun widget-choice-match-inline (widget values) | |
2087 | ;; Matches if one of the choices matches. | |
2088 | (let ((args (widget-get widget :args)) | |
2089 | current found) | |
2090 | (while (and args (null found)) | |
2091 | (setq current (car args) | |
2092 | args (cdr args) | |
2093 | found (widget-match-inline current values))) | |
2094 | found)) | |
2095 | ||
2096 | ;;; The `toggle' Widget. | |
2097 | ||
2098 | (define-widget 'toggle 'item | |
2099 | "Toggle between two states." | |
2100 | :format "%[%v%]\n" | |
2101 | :value-create 'widget-toggle-value-create | |
2102 | :action 'widget-toggle-action | |
2103 | :match (lambda (widget value) t) | |
2104 | :on "on" | |
2105 | :off "off") | |
2106 | ||
2107 | (defun widget-toggle-value-create (widget) | |
2108 | ;; Insert text representing the `on' and `off' states. | |
2109 | (if (widget-value widget) | |
2110 | (widget-glyph-insert widget | |
2111 | (widget-get widget :on) | |
2112 | (widget-get widget :on-glyph)) | |
2113 | (widget-glyph-insert widget | |
2114 | (widget-get widget :off) | |
2115 | (widget-get widget :off-glyph)))) | |
2116 | ||
2117 | (defun widget-toggle-action (widget &optional event) | |
2118 | ;; Toggle value. | |
d0acc4ea RS |
2119 | (widget-value-set widget (not (widget-value widget))) |
2120 | (widget-apply widget :notify widget event) | |
d4b8422f | 2121 | (run-hook-with-args 'widget-edit-functions widget)) |
6d528fc5 | 2122 | |
d543e20b PA |
2123 | ;;; The `checkbox' Widget. |
2124 | ||
2125 | (define-widget 'checkbox 'toggle | |
2126 | "A checkbox toggle." | |
25ac13b5 PA |
2127 | :button-suffix "" |
2128 | :button-prefix "" | |
d543e20b PA |
2129 | :format "%[%v%]" |
2130 | :on "[X]" | |
2131 | :on-glyph "check1" | |
2132 | :off "[ ]" | |
2133 | :off-glyph "check0" | |
2134 | :action 'widget-checkbox-action) | |
2135 | ||
2136 | (defun widget-checkbox-action (widget &optional event) | |
2137 | "Toggle checkbox, notify parent, and set active state of sibling." | |
2138 | (widget-toggle-action widget event) | |
2139 | (let ((sibling (widget-get-sibling widget))) | |
2140 | (when sibling | |
2141 | (if (widget-value widget) | |
2142 | (widget-apply sibling :activate) | |
2143 | (widget-apply sibling :deactivate))))) | |
2144 | ||
2145 | ;;; The `checklist' Widget. | |
2146 | ||
2147 | (define-widget 'checklist 'default | |
2148 | "A multiple choice widget." | |
2149 | :convert-widget 'widget-types-convert-widget | |
2150 | :format "%v" | |
2151 | :offset 4 | |
2152 | :entry-format "%b %v" | |
2153 | :menu-tag "checklist" | |
2154 | :greedy nil | |
2155 | :value-create 'widget-checklist-value-create | |
2156 | :value-delete 'widget-children-value-delete | |
2157 | :value-get 'widget-checklist-value-get | |
2158 | :validate 'widget-checklist-validate | |
2159 | :match 'widget-checklist-match | |
2160 | :match-inline 'widget-checklist-match-inline) | |
2161 | ||
2162 | (defun widget-checklist-value-create (widget) | |
2163 | ;; Insert all values | |
2164 | (let ((alist (widget-checklist-match-find widget (widget-get widget :value))) | |
2165 | (args (widget-get widget :args))) | |
2166 | (while args | |
2167 | (widget-checklist-add-item widget (car args) (assq (car args) alist)) | |
2168 | (setq args (cdr args))) | |
2169 | (widget-put widget :children (nreverse (widget-get widget :children))))) | |
2170 | ||
2171 | (defun widget-checklist-add-item (widget type chosen) | |
2172 | ;; Create checklist item in WIDGET of type TYPE. | |
2173 | ;; If the item is checked, CHOSEN is a cons whose cdr is the value. | |
2174 | (and (eq (preceding-char) ?\n) | |
2175 | (widget-get widget :indent) | |
2176 | (insert-char ? (widget-get widget :indent))) | |
2177 | (widget-specify-insert | |
2178 | (let* ((children (widget-get widget :children)) | |
2179 | (buttons (widget-get widget :buttons)) | |
2180 | (button-args (or (widget-get type :sibling-args) | |
2181 | (widget-get widget :button-args))) | |
2182 | (from (point)) | |
2183 | child button) | |
2184 | (insert (widget-get widget :entry-format)) | |
2185 | (goto-char from) | |
2186 | ;; Parse % escapes in format. | |
2187 | (while (re-search-forward "%\\([bv%]\\)" nil t) | |
2188 | (let ((escape (aref (match-string 1) 0))) | |
2189 | (replace-match "" t t) | |
2190 | (cond ((eq escape ?%) | |
2191 | (insert "%")) | |
2192 | ((eq escape ?b) | |
2193 | (setq button (apply 'widget-create-child-and-convert | |
2194 | widget 'checkbox | |
2195 | :value (not (null chosen)) | |
2196 | button-args))) | |
2197 | ((eq escape ?v) | |
2198 | (setq child | |
2199 | (cond ((not chosen) | |
2200 | (let ((child (widget-create-child widget type))) | |
2201 | (widget-apply child :deactivate) | |
2202 | child)) | |
2203 | ((widget-get type :inline) | |
2204 | (widget-create-child-value | |
2205 | widget type (cdr chosen))) | |
2206 | (t | |
2207 | (widget-create-child-value | |
2208 | widget type (car (cdr chosen))))))) | |
2209 | (t | |
2210 | (error "Unknown escape `%c'" escape))))) | |
2211 | ;; Update properties. | |
2212 | (and button child (widget-put child :button button)) | |
2213 | (and button (widget-put widget :buttons (cons button buttons))) | |
2214 | (and child (widget-put widget :children (cons child children)))))) | |
2215 | ||
2216 | (defun widget-checklist-match (widget values) | |
2217 | ;; All values must match a type in the checklist. | |
2218 | (and (listp values) | |
2219 | (null (cdr (widget-checklist-match-inline widget values))))) | |
2220 | ||
2221 | (defun widget-checklist-match-inline (widget values) | |
2222 | ;; Find the values which match a type in the checklist. | |
2223 | (let ((greedy (widget-get widget :greedy)) | |
ef3f635f | 2224 | (args (copy-sequence (widget-get widget :args))) |
d543e20b PA |
2225 | found rest) |
2226 | (while values | |
2227 | (let ((answer (widget-checklist-match-up args values))) | |
2228 | (cond (answer | |
2229 | (let ((vals (widget-match-inline answer values))) | |
2230 | (setq found (append found (car vals)) | |
2231 | values (cdr vals) | |
2232 | args (delq answer args)))) | |
2233 | (greedy | |
2234 | (setq rest (append rest (list (car values))) | |
2235 | values (cdr values))) | |
2236 | (t | |
2237 | (setq rest (append rest values) | |
2238 | values nil))))) | |
2239 | (cons found rest))) | |
2240 | ||
2241 | (defun widget-checklist-match-find (widget vals) | |
2242 | ;; Find the vals which match a type in the checklist. | |
2243 | ;; Return an alist of (TYPE MATCH). | |
2244 | (let ((greedy (widget-get widget :greedy)) | |
ef3f635f | 2245 | (args (copy-sequence (widget-get widget :args))) |
d543e20b PA |
2246 | found) |
2247 | (while vals | |
2248 | (let ((answer (widget-checklist-match-up args vals))) | |
2249 | (cond (answer | |
2250 | (let ((match (widget-match-inline answer vals))) | |
2251 | (setq found (cons (cons answer (car match)) found) | |
2252 | vals (cdr match) | |
2253 | args (delq answer args)))) | |
2254 | (greedy | |
2255 | (setq vals (cdr vals))) | |
2256 | (t | |
2257 | (setq vals nil))))) | |
2258 | found)) | |
2259 | ||
2260 | (defun widget-checklist-match-up (args vals) | |
2261 | ;; Rerturn the first type from ARGS that matches VALS. | |
2262 | (let (current found) | |
2263 | (while (and args (null found)) | |
2264 | (setq current (car args) | |
2265 | args (cdr args) | |
2266 | found (widget-match-inline current vals))) | |
2267 | (if found | |
2268 | current | |
2269 | nil))) | |
2270 | ||
2271 | (defun widget-checklist-value-get (widget) | |
2272 | ;; The values of all selected items. | |
2273 | (let ((children (widget-get widget :children)) | |
2274 | child result) | |
2275 | (while children | |
2276 | (setq child (car children) | |
2277 | children (cdr children)) | |
2278 | (if (widget-value (widget-get child :button)) | |
2279 | (setq result (append result (widget-apply child :value-inline))))) | |
2280 | result)) | |
2281 | ||
2282 | (defun widget-checklist-validate (widget) | |
2283 | ;; Ticked chilren must be valid. | |
2284 | (let ((children (widget-get widget :children)) | |
2285 | child button found) | |
2286 | (while (and children (not found)) | |
2287 | (setq child (car children) | |
2288 | children (cdr children) | |
2289 | button (widget-get child :button) | |
2290 | found (and (widget-value button) | |
2291 | (widget-apply child :validate)))) | |
2292 | found)) | |
2293 | ||
2294 | ;;; The `option' Widget | |
2295 | ||
2296 | (define-widget 'option 'checklist | |
2297 | "An widget with an optional item." | |
2298 | :inline t) | |
2299 | ||
2300 | ;;; The `choice-item' Widget. | |
2301 | ||
2302 | (define-widget 'choice-item 'item | |
2303 | "Button items that delegate action events to their parents." | |
a3c88c59 | 2304 | :action 'widget-parent-action |
d543e20b PA |
2305 | :format "%[%t%] \n") |
2306 | ||
d543e20b PA |
2307 | ;;; The `radio-button' Widget. |
2308 | ||
2309 | (define-widget 'radio-button 'toggle | |
2310 | "A radio button for use in the `radio' widget." | |
2311 | :notify 'widget-radio-button-notify | |
2312 | :format "%[%v%]" | |
25ac13b5 PA |
2313 | :button-suffix "" |
2314 | :button-prefix "" | |
d543e20b PA |
2315 | :on "(*)" |
2316 | :on-glyph "radio1" | |
2317 | :off "( )" | |
2318 | :off-glyph "radio0") | |
2319 | ||
2320 | (defun widget-radio-button-notify (widget child &optional event) | |
2321 | ;; Tell daddy. | |
2322 | (widget-apply (widget-get widget :parent) :action widget event)) | |
2323 | ||
2324 | ;;; The `radio-button-choice' Widget. | |
2325 | ||
2326 | (define-widget 'radio-button-choice 'default | |
2327 | "Select one of multiple options." | |
2328 | :convert-widget 'widget-types-convert-widget | |
2329 | :offset 4 | |
2330 | :format "%v" | |
2331 | :entry-format "%b %v" | |
2332 | :menu-tag "radio" | |
2333 | :value-create 'widget-radio-value-create | |
2334 | :value-delete 'widget-children-value-delete | |
2335 | :value-get 'widget-radio-value-get | |
2336 | :value-inline 'widget-radio-value-inline | |
2337 | :value-set 'widget-radio-value-set | |
2338 | :error "You must push one of the buttons" | |
2339 | :validate 'widget-radio-validate | |
2340 | :match 'widget-choice-match | |
2341 | :match-inline 'widget-choice-match-inline | |
2342 | :action 'widget-radio-action) | |
2343 | ||
2344 | (defun widget-radio-value-create (widget) | |
2345 | ;; Insert all values | |
2346 | (let ((args (widget-get widget :args)) | |
2347 | arg) | |
2348 | (while args | |
2349 | (setq arg (car args) | |
2350 | args (cdr args)) | |
2351 | (widget-radio-add-item widget arg)))) | |
2352 | ||
2353 | (defun widget-radio-add-item (widget type) | |
2354 | "Add to radio widget WIDGET a new radio button item of type TYPE." | |
2355 | ;; (setq type (widget-convert type)) | |
2356 | (and (eq (preceding-char) ?\n) | |
2357 | (widget-get widget :indent) | |
2358 | (insert-char ? (widget-get widget :indent))) | |
2359 | (widget-specify-insert | |
2360 | (let* ((value (widget-get widget :value)) | |
2361 | (children (widget-get widget :children)) | |
2362 | (buttons (widget-get widget :buttons)) | |
2363 | (button-args (or (widget-get type :sibling-args) | |
2364 | (widget-get widget :button-args))) | |
2365 | (from (point)) | |
2366 | (chosen (and (null (widget-get widget :choice)) | |
2367 | (widget-apply type :match value))) | |
2368 | child button) | |
2369 | (insert (widget-get widget :entry-format)) | |
2370 | (goto-char from) | |
2371 | ;; Parse % escapes in format. | |
2372 | (while (re-search-forward "%\\([bv%]\\)" nil t) | |
2373 | (let ((escape (aref (match-string 1) 0))) | |
2374 | (replace-match "" t t) | |
2375 | (cond ((eq escape ?%) | |
2376 | (insert "%")) | |
2377 | ((eq escape ?b) | |
2378 | (setq button (apply 'widget-create-child-and-convert | |
2379 | widget 'radio-button | |
2380 | :value (not (null chosen)) | |
2381 | button-args))) | |
2382 | ((eq escape ?v) | |
2383 | (setq child (if chosen | |
2384 | (widget-create-child-value | |
2385 | widget type value) | |
2386 | (widget-create-child widget type))) | |
2387 | (unless chosen | |
2388 | (widget-apply child :deactivate))) | |
2389 | (t | |
2390 | (error "Unknown escape `%c'" escape))))) | |
2391 | ;; Update properties. | |
2392 | (when chosen | |
2393 | (widget-put widget :choice type)) | |
2394 | (when button | |
2395 | (widget-put child :button button) | |
2396 | (widget-put widget :buttons (nconc buttons (list button)))) | |
2397 | (when child | |
2398 | (widget-put widget :children (nconc children (list child)))) | |
2399 | child))) | |
2400 | ||
2401 | (defun widget-radio-value-get (widget) | |
2402 | ;; Get value of the child widget. | |
2403 | (let ((chosen (widget-radio-chosen widget))) | |
2404 | (and chosen (widget-value chosen)))) | |
2405 | ||
2406 | (defun widget-radio-chosen (widget) | |
2407 | "Return the widget representing the chosen radio button." | |
2408 | (let ((children (widget-get widget :children)) | |
2409 | current found) | |
2410 | (while children | |
2411 | (setq current (car children) | |
2412 | children (cdr children)) | |
2413 | (let* ((button (widget-get current :button)) | |
2414 | (value (widget-apply button :value-get))) | |
2415 | (when value | |
2416 | (setq found current | |
2417 | children nil)))) | |
2418 | found)) | |
2419 | ||
2420 | (defun widget-radio-value-inline (widget) | |
2421 | ;; Get value of the child widget. | |
2422 | (let ((children (widget-get widget :children)) | |
2423 | current found) | |
2424 | (while children | |
2425 | (setq current (car children) | |
2426 | children (cdr children)) | |
2427 | (let* ((button (widget-get current :button)) | |
2428 | (value (widget-apply button :value-get))) | |
2429 | (when value | |
2430 | (setq found (widget-apply current :value-inline) | |
2431 | children nil)))) | |
2432 | found)) | |
2433 | ||
2434 | (defun widget-radio-value-set (widget value) | |
2435 | ;; We can't just delete and recreate a radio widget, since children | |
2436 | ;; can be added after the original creation and won't be recreated | |
2437 | ;; by `:create'. | |
2438 | (let ((children (widget-get widget :children)) | |
2439 | current found) | |
2440 | (while children | |
2441 | (setq current (car children) | |
2442 | children (cdr children)) | |
2443 | (let* ((button (widget-get current :button)) | |
2444 | (match (and (not found) | |
2445 | (widget-apply current :match value)))) | |
2446 | (widget-value-set button match) | |
2447 | (if match | |
2448 | (progn | |
2449 | (widget-value-set current value) | |
2450 | (widget-apply current :activate)) | |
2451 | (widget-apply current :deactivate)) | |
2452 | (setq found (or found match)))))) | |
2453 | ||
2454 | (defun widget-radio-validate (widget) | |
2455 | ;; Valid if we have made a valid choice. | |
2456 | (let ((children (widget-get widget :children)) | |
2457 | current found button) | |
2458 | (while (and children (not found)) | |
2459 | (setq current (car children) | |
2460 | children (cdr children) | |
2461 | button (widget-get current :button) | |
2462 | found (widget-apply button :value-get))) | |
2463 | (if found | |
2464 | (widget-apply current :validate) | |
2465 | widget))) | |
2466 | ||
2467 | (defun widget-radio-action (widget child event) | |
2468 | ;; Check if a radio button was pressed. | |
2469 | (let ((children (widget-get widget :children)) | |
2470 | (buttons (widget-get widget :buttons)) | |
2471 | current) | |
2472 | (when (memq child buttons) | |
2473 | (while children | |
2474 | (setq current (car children) | |
2475 | children (cdr children)) | |
2476 | (let* ((button (widget-get current :button))) | |
2477 | (cond ((eq child button) | |
2478 | (widget-value-set button t) | |
2479 | (widget-apply current :activate)) | |
2480 | ((widget-value button) | |
2481 | (widget-value-set button nil) | |
2482 | (widget-apply current :deactivate))))))) | |
2483 | ;; Pass notification to parent. | |
2484 | (widget-apply widget :notify child event)) | |
2485 | ||
2486 | ;;; The `insert-button' Widget. | |
2487 | ||
2488 | (define-widget 'insert-button 'push-button | |
2489 | "An insert button for the `editable-list' widget." | |
2490 | :tag "INS" | |
2491 | :help-echo "Insert a new item into the list at this position." | |
2492 | :action 'widget-insert-button-action) | |
2493 | ||
2494 | (defun widget-insert-button-action (widget &optional event) | |
2495 | ;; Ask the parent to insert a new item. | |
2496 | (widget-apply (widget-get widget :parent) | |
2497 | :insert-before (widget-get widget :widget))) | |
2498 | ||
2499 | ;;; The `delete-button' Widget. | |
2500 | ||
2501 | (define-widget 'delete-button 'push-button | |
2502 | "A delete button for the `editable-list' widget." | |
2503 | :tag "DEL" | |
2504 | :help-echo "Delete this item from the list." | |
2505 | :action 'widget-delete-button-action) | |
2506 | ||
2507 | (defun widget-delete-button-action (widget &optional event) | |
2508 | ;; Ask the parent to insert a new item. | |
2509 | (widget-apply (widget-get widget :parent) | |
2510 | :delete-at (widget-get widget :widget))) | |
2511 | ||
2512 | ;;; The `editable-list' Widget. | |
2513 | ||
2514 | (defcustom widget-editable-list-gui nil | |
2515 | "If non nil, use GUI push-buttons in editable list when available." | |
2516 | :type 'boolean | |
2517 | :group 'widgets) | |
2518 | ||
2519 | (define-widget 'editable-list 'default | |
2520 | "A variable list of widgets of the same type." | |
2521 | :convert-widget 'widget-types-convert-widget | |
2522 | :offset 12 | |
2523 | :format "%v%i\n" | |
2524 | :format-handler 'widget-editable-list-format-handler | |
2525 | :entry-format "%i %d %v" | |
2526 | :menu-tag "editable-list" | |
2527 | :value-create 'widget-editable-list-value-create | |
2528 | :value-delete 'widget-children-value-delete | |
2529 | :value-get 'widget-editable-list-value-get | |
a3c88c59 | 2530 | :validate 'widget-children-validate |
d543e20b PA |
2531 | :match 'widget-editable-list-match |
2532 | :match-inline 'widget-editable-list-match-inline | |
2533 | :insert-before 'widget-editable-list-insert-before | |
2534 | :delete-at 'widget-editable-list-delete-at) | |
2535 | ||
2536 | (defun widget-editable-list-format-handler (widget escape) | |
2537 | ;; We recognize the insert button. | |
2538 | (let ((widget-push-button-gui widget-editable-list-gui)) | |
2539 | (cond ((eq escape ?i) | |
2540 | (and (widget-get widget :indent) | |
2541 | (insert-char ? (widget-get widget :indent))) | |
2542 | (apply 'widget-create-child-and-convert | |
2543 | widget 'insert-button | |
2544 | (widget-get widget :append-button-args))) | |
2545 | (t | |
2546 | (widget-default-format-handler widget escape))))) | |
2547 | ||
2548 | (defun widget-editable-list-value-create (widget) | |
2549 | ;; Insert all values | |
2550 | (let* ((value (widget-get widget :value)) | |
2551 | (type (nth 0 (widget-get widget :args))) | |
2552 | (inlinep (widget-get type :inline)) | |
2553 | children) | |
2554 | (widget-put widget :value-pos (copy-marker (point))) | |
2555 | (set-marker-insertion-type (widget-get widget :value-pos) t) | |
2556 | (while value | |
2557 | (let ((answer (widget-match-inline type value))) | |
2558 | (if answer | |
2559 | (setq children (cons (widget-editable-list-entry-create | |
2560 | widget | |
2561 | (if inlinep | |
2562 | (car answer) | |
2563 | (car (car answer))) | |
2564 | t) | |
2565 | children) | |
2566 | value (cdr answer)) | |
2567 | (setq value nil)))) | |
2568 | (widget-put widget :children (nreverse children)))) | |
2569 | ||
2570 | (defun widget-editable-list-value-get (widget) | |
2571 | ;; Get value of the child widget. | |
2572 | (apply 'append (mapcar (lambda (child) (widget-apply child :value-inline)) | |
2573 | (widget-get widget :children)))) | |
2574 | ||
d543e20b PA |
2575 | (defun widget-editable-list-match (widget value) |
2576 | ;; Value must be a list and all the members must match the type. | |
2577 | (and (listp value) | |
2578 | (null (cdr (widget-editable-list-match-inline widget value))))) | |
2579 | ||
2580 | (defun widget-editable-list-match-inline (widget value) | |
2581 | (let ((type (nth 0 (widget-get widget :args))) | |
2582 | (ok t) | |
2583 | found) | |
2584 | (while (and value ok) | |
2585 | (let ((answer (widget-match-inline type value))) | |
2586 | (if answer | |
2587 | (setq found (append found (car answer)) | |
2588 | value (cdr answer)) | |
2589 | (setq ok nil)))) | |
2590 | (cons found value))) | |
2591 | ||
2592 | (defun widget-editable-list-insert-before (widget before) | |
2593 | ;; Insert a new child in the list of children. | |
2594 | (save-excursion | |
2595 | (let ((children (widget-get widget :children)) | |
2596 | (inhibit-read-only t) | |
c6753d66 | 2597 | before-change-functions |
d543e20b PA |
2598 | after-change-functions) |
2599 | (cond (before | |
2600 | (goto-char (widget-get before :entry-from))) | |
2601 | (t | |
2602 | (goto-char (widget-get widget :value-pos)))) | |
2603 | (let ((child (widget-editable-list-entry-create | |
2604 | widget nil nil))) | |
2605 | (when (< (widget-get child :entry-from) (widget-get widget :from)) | |
2606 | (set-marker (widget-get widget :from) | |
2607 | (widget-get child :entry-from))) | |
d543e20b PA |
2608 | (if (eq (car children) before) |
2609 | (widget-put widget :children (cons child children)) | |
2610 | (while (not (eq (car (cdr children)) before)) | |
2611 | (setq children (cdr children))) | |
2612 | (setcdr children (cons child (cdr children))))))) | |
2613 | (widget-setup) | |
0a3a0b56 | 2614 | (widget-apply widget :notify widget)) |
d543e20b PA |
2615 | |
2616 | (defun widget-editable-list-delete-at (widget child) | |
2617 | ;; Delete child from list of children. | |
2618 | (save-excursion | |
ef3f635f | 2619 | (let ((buttons (copy-sequence (widget-get widget :buttons))) |
d543e20b PA |
2620 | button |
2621 | (inhibit-read-only t) | |
c6753d66 | 2622 | before-change-functions |
d543e20b PA |
2623 | after-change-functions) |
2624 | (while buttons | |
2625 | (setq button (car buttons) | |
2626 | buttons (cdr buttons)) | |
2627 | (when (eq (widget-get button :widget) child) | |
2628 | (widget-put widget | |
2629 | :buttons (delq button (widget-get widget :buttons))) | |
2630 | (widget-delete button)))) | |
2631 | (let ((entry-from (widget-get child :entry-from)) | |
2632 | (entry-to (widget-get child :entry-to)) | |
2633 | (inhibit-read-only t) | |
c6753d66 | 2634 | before-change-functions |
d543e20b PA |
2635 | after-change-functions) |
2636 | (widget-delete child) | |
2637 | (delete-region entry-from entry-to) | |
2638 | (set-marker entry-from nil) | |
2639 | (set-marker entry-to nil)) | |
2640 | (widget-put widget :children (delq child (widget-get widget :children)))) | |
2641 | (widget-setup) | |
2642 | (widget-apply widget :notify widget)) | |
2643 | ||
2644 | (defun widget-editable-list-entry-create (widget value conv) | |
2645 | ;; Create a new entry to the list. | |
2646 | (let ((type (nth 0 (widget-get widget :args))) | |
2647 | (widget-push-button-gui widget-editable-list-gui) | |
2648 | child delete insert) | |
2649 | (widget-specify-insert | |
2650 | (save-excursion | |
2651 | (and (widget-get widget :indent) | |
2652 | (insert-char ? (widget-get widget :indent))) | |
2653 | (insert (widget-get widget :entry-format))) | |
2654 | ;; Parse % escapes in format. | |
2655 | (while (re-search-forward "%\\(.\\)" nil t) | |
2656 | (let ((escape (aref (match-string 1) 0))) | |
2657 | (replace-match "" t t) | |
2658 | (cond ((eq escape ?%) | |
2659 | (insert "%")) | |
2660 | ((eq escape ?i) | |
2661 | (setq insert (apply 'widget-create-child-and-convert | |
2662 | widget 'insert-button | |
2663 | (widget-get widget :insert-button-args)))) | |
2664 | ((eq escape ?d) | |
2665 | (setq delete (apply 'widget-create-child-and-convert | |
2666 | widget 'delete-button | |
2667 | (widget-get widget :delete-button-args)))) | |
2668 | ((eq escape ?v) | |
2669 | (if conv | |
2670 | (setq child (widget-create-child-value | |
2671 | widget type value)) | |
2672 | (setq child (widget-create-child widget type)))) | |
2673 | (t | |
2674 | (error "Unknown escape `%c'" escape))))) | |
2675 | (widget-put widget | |
2676 | :buttons (cons delete | |
2677 | (cons insert | |
2678 | (widget-get widget :buttons)))) | |
2679 | (let ((entry-from (copy-marker (point-min))) | |
2680 | (entry-to (copy-marker (point-max)))) | |
d543e20b PA |
2681 | (set-marker-insertion-type entry-from t) |
2682 | (set-marker-insertion-type entry-to nil) | |
2683 | (widget-put child :entry-from entry-from) | |
2684 | (widget-put child :entry-to entry-to))) | |
2685 | (widget-put insert :widget child) | |
2686 | (widget-put delete :widget child) | |
2687 | child)) | |
2688 | ||
2689 | ;;; The `group' Widget. | |
2690 | ||
2691 | (define-widget 'group 'default | |
2692 | "A widget which group other widgets inside." | |
2693 | :convert-widget 'widget-types-convert-widget | |
2694 | :format "%v" | |
2695 | :value-create 'widget-group-value-create | |
2696 | :value-delete 'widget-children-value-delete | |
2697 | :value-get 'widget-editable-list-value-get | |
a3c88c59 | 2698 | :validate 'widget-children-validate |
d543e20b PA |
2699 | :match 'widget-group-match |
2700 | :match-inline 'widget-group-match-inline) | |
2701 | ||
2702 | (defun widget-group-value-create (widget) | |
2703 | ;; Create each component. | |
2704 | (let ((args (widget-get widget :args)) | |
2705 | (value (widget-get widget :value)) | |
2706 | arg answer children) | |
2707 | (while args | |
2708 | (setq arg (car args) | |
2709 | args (cdr args) | |
2710 | answer (widget-match-inline arg value) | |
2711 | value (cdr answer)) | |
2712 | (and (eq (preceding-char) ?\n) | |
2713 | (widget-get widget :indent) | |
2714 | (insert-char ? (widget-get widget :indent))) | |
3acab5ef PA |
2715 | (push (cond ((null answer) |
2716 | (widget-create-child widget arg)) | |
2717 | ((widget-get arg :inline) | |
2718 | (widget-create-child-value widget arg (car answer))) | |
2719 | (t | |
2720 | (widget-create-child-value widget arg (car (car answer))))) | |
2721 | children)) | |
d543e20b PA |
2722 | (widget-put widget :children (nreverse children)))) |
2723 | ||
2724 | (defun widget-group-match (widget values) | |
2725 | ;; Match if the components match. | |
2726 | (and (listp values) | |
2727 | (let ((match (widget-group-match-inline widget values))) | |
2728 | (and match (null (cdr match)))))) | |
2729 | ||
2730 | (defun widget-group-match-inline (widget vals) | |
2731 | ;; Match if the components match. | |
2732 | (let ((args (widget-get widget :args)) | |
2733 | argument answer found) | |
2734 | (while args | |
2735 | (setq argument (car args) | |
2736 | args (cdr args) | |
2737 | answer (widget-match-inline argument vals)) | |
2738 | (if answer | |
2739 | (setq vals (cdr answer) | |
2740 | found (append found (car answer))) | |
2741 | (setq vals nil | |
2742 | args nil))) | |
2743 | (if answer | |
2744 | (cons found vals) | |
2745 | nil))) | |
2746 | ||
3acab5ef | 2747 | ;;; The `visibility' Widget. |
d543e20b | 2748 | |
3acab5ef PA |
2749 | (define-widget 'visibility 'item |
2750 | "An indicator and manipulator for hidden items." | |
2751 | :format "%[%v%]" | |
2752 | :button-prefix "" | |
2753 | :button-suffix "" | |
c6753d66 RS |
2754 | :on "Hide" |
2755 | :off "Show" | |
3acab5ef PA |
2756 | :value-create 'widget-visibility-value-create |
2757 | :action 'widget-toggle-action | |
2758 | :match (lambda (widget value) t)) | |
d543e20b | 2759 | |
3acab5ef PA |
2760 | (defun widget-visibility-value-create (widget) |
2761 | ;; Insert text representing the `on' and `off' states. | |
2762 | (let ((on (widget-get widget :on)) | |
2763 | (off (widget-get widget :off))) | |
2764 | (if on | |
2765 | (setq on (concat widget-push-button-prefix | |
2766 | on | |
2767 | widget-push-button-suffix)) | |
2768 | (setq on "")) | |
2769 | (if off | |
2770 | (setq off (concat widget-push-button-prefix | |
c6753d66 RS |
2771 | off |
2772 | widget-push-button-suffix)) | |
3acab5ef PA |
2773 | (setq off "")) |
2774 | (if (widget-value widget) | |
2775 | (widget-glyph-insert widget on "down" "down-pushed") | |
c6753d66 RS |
2776 | (widget-glyph-insert widget off "right" "right-pushed")))) |
2777 | ||
8697863a PA |
2778 | ;;; The `documentation-link' Widget. |
2779 | ;; | |
2780 | ;; This is a helper widget for `documentation-string'. | |
3acab5ef | 2781 | |
8697863a PA |
2782 | (define-widget 'documentation-link 'link |
2783 | "Link type used in documentation strings." | |
2784 | :tab-order -1 | |
2785 | :help-echo 'widget-documentation-link-echo-help | |
2786 | :action 'widget-documentation-link-action) | |
2787 | ||
2788 | (defun widget-documentation-link-echo-help (widget) | |
2789 | "Tell what this link will describe." | |
2790 | (concat "Describe the `" (widget-get widget :value) "' symbol.")) | |
2791 | ||
2792 | (defun widget-documentation-link-action (widget &optional event) | |
f9923499 | 2793 | "Display documentation for WIDGET's value. Ignore optional argument EVENT." |
9dccd7ef RS |
2794 | (let* ((string (widget-get widget :value)) |
2795 | (symbol (intern string))) | |
2796 | (if (and (fboundp symbol) (boundp symbol)) | |
f9923499 | 2797 | ;; If there are two doc strings, give the user a way to pick one. |
9dccd7ef RS |
2798 | (apropos (concat "\\`" (regexp-quote string) "\\'")) |
2799 | (if (fboundp symbol) | |
2800 | (describe-function symbol) | |
2801 | (describe-variable symbol))))) | |
8697863a PA |
2802 | |
2803 | (defcustom widget-documentation-links t | |
2804 | "Add hyperlinks to documentation strings when non-nil." | |
2805 | :type 'boolean | |
2806 | :group 'widget-documentation) | |
2807 | ||
2808 | (defcustom widget-documentation-link-regexp "`\\([^\n`' ]+\\)'" | |
2809 | "Regexp for matching potential links in documentation strings. | |
2810 | The first group should be the link itself." | |
2811 | :type 'regexp | |
2812 | :group 'widget-documentation) | |
2813 | ||
2814 | (defcustom widget-documentation-link-p 'intern-soft | |
2815 | "Predicate used to test if a string is useful as a link. | |
2816 | The value should be a function. The function will be called one | |
2817 | argument, a string, and should return non-nil if there should be a | |
2818 | link for that string." | |
2819 | :type 'function | |
2820 | :options '(widget-documentation-link-p) | |
2821 | :group 'widget-documentation) | |
2822 | ||
2823 | (defcustom widget-documentation-link-type 'documentation-link | |
2824 | "Widget type used for links in documentation strings." | |
2825 | :type 'symbol | |
2826 | :group 'widget-documentation) | |
2827 | ||
2828 | (defun widget-documentation-link-add (widget from to) | |
2829 | (widget-specify-doc widget from to) | |
2830 | (when widget-documentation-links | |
2831 | (let ((regexp widget-documentation-link-regexp) | |
2832 | (predicate widget-documentation-link-p) | |
2833 | (type widget-documentation-link-type) | |
2834 | (buttons (widget-get widget :buttons))) | |
2835 | (save-excursion | |
2836 | (goto-char from) | |
2837 | (while (re-search-forward regexp to t) | |
2838 | (let ((name (match-string 1)) | |
a1a4fa22 PA |
2839 | (begin (match-beginning 1)) |
2840 | (end (match-end 1))) | |
8697863a PA |
2841 | (when (funcall predicate name) |
2842 | (push (widget-convert-button type begin end :value name) | |
2843 | buttons))))) | |
2844 | (widget-put widget :buttons buttons))) | |
2845 | (let ((indent (widget-get widget :indent))) | |
2846 | (when (and indent (not (zerop indent))) | |
2847 | (save-excursion | |
2848 | (save-restriction | |
2849 | (narrow-to-region from to) | |
2850 | (goto-char (point-min)) | |
2851 | (while (search-forward "\n" nil t) | |
2852 | (insert-char ?\ indent))))))) | |
2853 | ||
2854 | ;;; The `documentation-string' Widget. | |
0ce5b5d5 | 2855 | |
3acab5ef PA |
2856 | (define-widget 'documentation-string 'item |
2857 | "A documentation string." | |
2858 | :format "%v" | |
2859 | :action 'widget-documentation-string-action | |
2860 | :value-delete 'widget-children-value-delete | |
2861 | :value-create 'widget-documentation-string-value-create) | |
2862 | ||
2863 | (defun widget-documentation-string-value-create (widget) | |
2864 | ;; Insert documentation string. | |
2865 | (let ((doc (widget-value widget)) | |
8697863a | 2866 | (indent (widget-get widget :indent)) |
6aaedd12 PA |
2867 | (shown (widget-get (widget-get widget :parent) :documentation-shown)) |
2868 | (start (point))) | |
3acab5ef PA |
2869 | (if (string-match "\n" doc) |
2870 | (let ((before (substring doc 0 (match-beginning 0))) | |
2871 | (after (substring doc (match-beginning 0))) | |
2872 | buttons) | |
2873 | (insert before " ") | |
8697863a | 2874 | (widget-documentation-link-add widget start (point)) |
3acab5ef PA |
2875 | (push (widget-create-child-and-convert |
2876 | widget 'visibility | |
8697863a | 2877 | :help-echo "Show or hide rest of the documentation." |
c6753d66 | 2878 | :off "More" |
3acab5ef PA |
2879 | :action 'widget-parent-action |
2880 | shown) | |
2881 | buttons) | |
2882 | (when shown | |
0ce5b5d5 | 2883 | (setq start (point)) |
8697863a PA |
2884 | (when (and indent (not (zerop indent))) |
2885 | (insert-char ?\ indent)) | |
0ce5b5d5 | 2886 | (insert after) |
8697863a | 2887 | (widget-documentation-link-add widget start (point))) |
3acab5ef | 2888 | (widget-put widget :buttons buttons)) |
6aaedd12 | 2889 | (insert doc) |
8697863a | 2890 | (widget-documentation-link-add widget start (point)))) |
3acab5ef PA |
2891 | (insert "\n")) |
2892 | ||
2893 | (defun widget-documentation-string-action (widget &rest ignore) | |
2894 | ;; Toggle documentation. | |
2895 | (let ((parent (widget-get widget :parent))) | |
2896 | (widget-put parent :documentation-shown | |
2897 | (not (widget-get parent :documentation-shown)))) | |
2898 | ;; Redraw. | |
d543e20b PA |
2899 | (widget-value-set widget (widget-value widget))) |
2900 | ||
2901 | ;;; The Sexp Widgets. | |
2902 | ||
2903 | (define-widget 'const 'item | |
2904 | "An immutable sexp." | |
6d528fc5 | 2905 | :prompt-value 'widget-const-prompt-value |
d543e20b PA |
2906 | :format "%t\n%d") |
2907 | ||
6d528fc5 PA |
2908 | (defun widget-const-prompt-value (widget prompt value unbound) |
2909 | ;; Return the value of the const. | |
2910 | (widget-value widget)) | |
2911 | ||
2912 | (define-widget 'function-item 'const | |
d543e20b PA |
2913 | "An immutable function name." |
2914 | :format "%v\n%h" | |
2915 | :documentation-property (lambda (symbol) | |
2916 | (condition-case nil | |
2917 | (documentation symbol t) | |
2918 | (error nil)))) | |
2919 | ||
6d528fc5 | 2920 | (define-widget 'variable-item 'const |
d543e20b PA |
2921 | "An immutable variable name." |
2922 | :format "%v\n%h" | |
2923 | :documentation-property 'variable-documentation) | |
2924 | ||
6d528fc5 PA |
2925 | (defvar widget-string-prompt-value-history nil |
2926 | "History of input to `widget-string-prompt-value'.") | |
2927 | ||
a3c88c59 PA |
2928 | (define-widget 'string 'editable-field |
2929 | "A string" | |
2930 | :tag "String" | |
2931 | :format "%{%t%}: %v" | |
0ce5b5d5 | 2932 | :complete-function 'ispell-complete-word |
a3c88c59 | 2933 | :prompt-history 'widget-string-prompt-value-history) |
6d528fc5 | 2934 | |
d543e20b PA |
2935 | (define-widget 'regexp 'string |
2936 | "A regular expression." | |
6d528fc5 PA |
2937 | :match 'widget-regexp-match |
2938 | :validate 'widget-regexp-validate | |
4ee1cf9f PA |
2939 | ;; Doesn't work well with terminating newline. |
2940 | ;; :value-face 'widget-single-line-field-face | |
d543e20b PA |
2941 | :tag "Regexp") |
2942 | ||
6d528fc5 PA |
2943 | (defun widget-regexp-match (widget value) |
2944 | ;; Match valid regexps. | |
2945 | (and (stringp value) | |
a3c88c59 | 2946 | (condition-case nil |
6d528fc5 PA |
2947 | (prog1 t |
2948 | (string-match value "")) | |
2949 | (error nil)))) | |
2950 | ||
2951 | (defun widget-regexp-validate (widget) | |
2952 | "Check that the value of WIDGET is a valid regexp." | |
2953 | (let ((val (widget-value widget))) | |
2954 | (condition-case data | |
2955 | (prog1 nil | |
2956 | (string-match val "")) | |
2957 | (error (widget-put widget :error (error-message-string data)) | |
2958 | widget)))) | |
2959 | ||
d543e20b PA |
2960 | (define-widget 'file 'string |
2961 | "A file widget. | |
25ac13b5 | 2962 | It will read a file name from the minibuffer when invoked." |
f1231b8e | 2963 | :complete-function 'widget-file-complete |
6d528fc5 | 2964 | :prompt-value 'widget-file-prompt-value |
a3c88c59 | 2965 | :format "%{%t%}: %v" |
4ee1cf9f PA |
2966 | ;; Doesn't work well with terminating newline. |
2967 | ;; :value-face 'widget-single-line-field-face | |
f1231b8e RS |
2968 | :tag "File") |
2969 | ||
2970 | (defun widget-file-complete () | |
2971 | "Perform completion on file name preceding point." | |
2972 | (interactive) | |
2973 | (let* ((end (point)) | |
2974 | (beg (save-excursion | |
2975 | (skip-chars-backward "^ ") | |
2976 | (point))) | |
2977 | (pattern (buffer-substring beg end)) | |
2978 | (name-part (file-name-nondirectory pattern)) | |
2979 | (directory (file-name-directory pattern)) | |
2980 | (completion (file-name-completion name-part directory))) | |
2981 | (cond ((eq completion t)) | |
2982 | ((null completion) | |
2983 | (message "Can't find completion for \"%s\"" pattern) | |
2984 | (ding)) | |
2985 | ((not (string= name-part completion)) | |
2986 | (delete-region beg end) | |
2987 | (insert (expand-file-name completion directory))) | |
2988 | (t | |
2989 | (message "Making completion list...") | |
2990 | (let ((list (file-name-all-completions name-part directory))) | |
2991 | (setq list (sort list 'string<)) | |
2992 | (with-output-to-temp-buffer "*Completions*" | |
2993 | (display-completion-list list))) | |
2994 | (message "Making completion list...%s" "done"))))) | |
d543e20b | 2995 | |
6d528fc5 PA |
2996 | (defun widget-file-prompt-value (widget prompt value unbound) |
2997 | ;; Read file from minibuffer. | |
2998 | (abbreviate-file-name | |
2999 | (if unbound | |
3000 | (read-file-name prompt) | |
a3c88c59 | 3001 | (let ((prompt2 (format "%s (default %s) " prompt value)) |
6d528fc5 PA |
3002 | (dir (file-name-directory value)) |
3003 | (file (file-name-nondirectory value)) | |
3004 | (must-match (widget-get widget :must-match))) | |
3005 | (read-file-name prompt2 dir nil must-match file))))) | |
3006 | ||
f1231b8e RS |
3007 | ;;;(defun widget-file-action (widget &optional event) |
3008 | ;;; ;; Read a file name from the minibuffer. | |
3009 | ;;; (let* ((value (widget-value widget)) | |
3010 | ;;; (dir (file-name-directory value)) | |
3011 | ;;; (file (file-name-nondirectory value)) | |
3012 | ;;; (menu-tag (widget-apply widget :menu-tag-get)) | |
3013 | ;;; (must-match (widget-get widget :must-match)) | |
3014 | ;;; (answer (read-file-name (concat menu-tag ": (default `" value "') ") | |
3015 | ;;; dir nil must-match file))) | |
3016 | ;;; (widget-value-set widget (abbreviate-file-name answer)) | |
3017 | ;;; (widget-setup) | |
3018 | ;;; (widget-apply widget :notify widget event))) | |
d543e20b PA |
3019 | |
3020 | (define-widget 'directory 'file | |
3021 | "A directory widget. | |
25ac13b5 | 3022 | It will read a directory name from the minibuffer when invoked." |
d543e20b PA |
3023 | :tag "Directory") |
3024 | ||
a3c88c59 PA |
3025 | (defvar widget-symbol-prompt-value-history nil |
3026 | "History of input to `widget-symbol-prompt-value'.") | |
3027 | ||
3028 | (define-widget 'symbol 'editable-field | |
d543e20b PA |
3029 | "A lisp symbol." |
3030 | :value nil | |
3031 | :tag "Symbol" | |
a3c88c59 | 3032 | :format "%{%t%}: %v" |
d543e20b | 3033 | :match (lambda (widget value) (symbolp value)) |
f1231b8e | 3034 | :complete-function 'lisp-complete-symbol |
a3c88c59 PA |
3035 | :prompt-internal 'widget-symbol-prompt-internal |
3036 | :prompt-match 'symbolp | |
3037 | :prompt-history 'widget-symbol-prompt-value-history | |
d543e20b PA |
3038 | :value-to-internal (lambda (widget value) |
3039 | (if (symbolp value) | |
3040 | (symbol-name value) | |
3041 | value)) | |
3042 | :value-to-external (lambda (widget value) | |
3043 | (if (stringp value) | |
3044 | (intern value) | |
3045 | value))) | |
3046 | ||
a3c88c59 PA |
3047 | (defun widget-symbol-prompt-internal (widget prompt initial history) |
3048 | ;; Read file from minibuffer. | |
3049 | (let ((answer (completing-read prompt obarray | |
3050 | (widget-get widget :prompt-match) | |
3051 | nil initial history))) | |
3052 | (if (and (stringp answer) | |
3053 | (not (zerop (length answer)))) | |
3054 | answer | |
3055 | (error "No value")))) | |
3056 | ||
3057 | (defvar widget-function-prompt-value-history nil | |
3058 | "History of input to `widget-function-prompt-value'.") | |
3059 | ||
d543e20b | 3060 | (define-widget 'function 'sexp |
d543e20b | 3061 | "A lisp function." |
0ce5b5d5 | 3062 | :complete-function 'lisp-complete-symbol |
a3c88c59 PA |
3063 | :prompt-value 'widget-field-prompt-value |
3064 | :prompt-internal 'widget-symbol-prompt-internal | |
3065 | :prompt-match 'fboundp | |
3066 | :prompt-history 'widget-function-prompt-value-history | |
3067 | :action 'widget-field-action | |
d543e20b PA |
3068 | :tag "Function") |
3069 | ||
a3c88c59 PA |
3070 | (defvar widget-variable-prompt-value-history nil |
3071 | "History of input to `widget-variable-prompt-value'.") | |
3072 | ||
d543e20b PA |
3073 | (define-widget 'variable 'symbol |
3074 | ;; Should complete on variables. | |
3075 | "A lisp variable." | |
a3c88c59 PA |
3076 | :prompt-match 'boundp |
3077 | :prompt-history 'widget-variable-prompt-value-history | |
d543e20b PA |
3078 | :tag "Variable") |
3079 | ||
6aaedd12 PA |
3080 | (when (featurep 'mule) |
3081 | (defvar widget-coding-system-prompt-value-history nil | |
3082 | "History of input to `widget-coding-system-prompt-value'.") | |
3083 | ||
3084 | (define-widget 'coding-system 'symbol | |
3085 | "A MULE coding-system." | |
3086 | :format "%{%t%}: %v" | |
3087 | :tag "Coding system" | |
3088 | :prompt-history 'widget-coding-system-prompt-value-history | |
3089 | :prompt-value 'widget-coding-system-prompt-value | |
3090 | :action 'widget-coding-system-action) | |
3091 | ||
3092 | (defun widget-coding-system-prompt-value (widget prompt value unbound) | |
3093 | ;; Read coding-system from minibuffer. | |
3094 | (intern | |
3095 | (completing-read (format "%s (default %s) " prompt value) | |
3096 | (mapcar (function | |
3097 | (lambda (sym) | |
3098 | (list (symbol-name sym)) | |
3099 | )) | |
3100 | (coding-system-list))))) | |
3101 | ||
3102 | (defun widget-coding-system-action (widget &optional event) | |
3103 | ;; Read a file name from the minibuffer. | |
3104 | (let ((answer | |
3105 | (widget-coding-system-prompt-value | |
3106 | widget | |
3107 | (widget-apply widget :menu-tag-get) | |
3108 | (widget-value widget) | |
3109 | t))) | |
3110 | (widget-value-set widget answer) | |
3111 | (widget-apply widget :notify widget event) | |
3112 | (widget-setup))) | |
3113 | ) | |
3114 | ||
a3c88c59 | 3115 | (define-widget 'sexp 'editable-field |
d543e20b PA |
3116 | "An arbitrary lisp expression." |
3117 | :tag "Lisp expression" | |
a3c88c59 | 3118 | :format "%{%t%}: %v" |
d543e20b PA |
3119 | :value nil |
3120 | :validate 'widget-sexp-validate | |
3121 | :match (lambda (widget value) t) | |
3122 | :value-to-internal 'widget-sexp-value-to-internal | |
6d528fc5 | 3123 | :value-to-external (lambda (widget value) (read value)) |
a3c88c59 | 3124 | :prompt-history 'widget-sexp-prompt-value-history |
6d528fc5 | 3125 | :prompt-value 'widget-sexp-prompt-value) |
d543e20b PA |
3126 | |
3127 | (defun widget-sexp-value-to-internal (widget value) | |
3128 | ;; Use pp for printer representation. | |
6d1ab9d4 RS |
3129 | (let ((pp (if (symbolp value) |
3130 | (prin1-to-string value) | |
3131 | (pp-to-string value)))) | |
d543e20b PA |
3132 | (while (string-match "\n\\'" pp) |
3133 | (setq pp (substring pp 0 -1))) | |
3134 | (if (or (string-match "\n\\'" pp) | |
3135 | (> (length pp) 40)) | |
3136 | (concat "\n" pp) | |
3137 | pp))) | |
3138 | ||
3139 | (defun widget-sexp-validate (widget) | |
3140 | ;; Valid if we can read the string and there is no junk left after it. | |
3141 | (save-excursion | |
3142 | (let ((buffer (set-buffer (get-buffer-create " *Widget Scratch*")))) | |
3143 | (erase-buffer) | |
3144 | (insert (widget-apply widget :value-get)) | |
3145 | (goto-char (point-min)) | |
3146 | (condition-case data | |
3147 | (let ((value (read buffer))) | |
3148 | (if (eobp) | |
3149 | (if (widget-apply widget :match value) | |
3150 | nil | |
3151 | (widget-put widget :error (widget-get widget :type-error)) | |
3152 | widget) | |
3153 | (widget-put widget | |
3154 | :error (format "Junk at end of expression: %s" | |
3155 | (buffer-substring (point) | |
3156 | (point-max)))) | |
3157 | widget)) | |
3158 | (error (widget-put widget :error (error-message-string data)) | |
3159 | widget))))) | |
3160 | ||
6d528fc5 PA |
3161 | (defvar widget-sexp-prompt-value-history nil |
3162 | "History of input to `widget-sexp-prompt-value'.") | |
3163 | ||
3164 | (defun widget-sexp-prompt-value (widget prompt value unbound) | |
3165 | ;; Read an arbitrary sexp. | |
3166 | (let ((found (read-string prompt | |
a3c88c59 PA |
3167 | (if unbound nil (cons (prin1-to-string value) 0)) |
3168 | (widget-get widget :prompt-history)))) | |
3169 | (save-excursion | |
3170 | (let ((buffer (set-buffer (get-buffer-create " *Widget Scratch*")))) | |
3171 | (erase-buffer) | |
3172 | (insert found) | |
3173 | (goto-char (point-min)) | |
3174 | (let ((answer (read buffer))) | |
3175 | (unless (eobp) | |
3176 | (error "Junk at end of expression: %s" | |
3177 | (buffer-substring (point) (point-max)))) | |
3178 | answer))))) | |
3179 | ||
0b296dac RS |
3180 | (define-widget 'restricted-sexp 'sexp |
3181 | "A Lisp expression restricted to values that match. | |
3182 | To use this type, you must define :match or :match-alternatives." | |
3183 | :type-error "The specified value is not valid" | |
3184 | :match 'widget-restricted-sexp-match | |
3185 | :value-to-internal (lambda (widget value) | |
3186 | (if (widget-apply widget :match value) | |
3187 | (prin1-to-string value) | |
3188 | value))) | |
3189 | ||
3190 | (defun widget-restricted-sexp-match (widget value) | |
3191 | (let ((alternatives (widget-get widget :match-alternatives)) | |
3192 | matched) | |
3193 | (while (and alternatives (not matched)) | |
3194 | (if (cond ((functionp (car alternatives)) | |
3195 | (funcall (car alternatives) value)) | |
3196 | ((and (consp (car alternatives)) | |
3197 | (eq (car (car alternatives)) 'quote)) | |
3198 | (eq value (nth 1 (car alternatives))))) | |
3199 | (setq matched t)) | |
3200 | (setq alternatives (cdr alternatives))) | |
3201 | matched)) | |
3202 | ||
3203 | (define-widget 'integer 'restricted-sexp | |
d543e20b PA |
3204 | "An integer." |
3205 | :tag "Integer" | |
3206 | :value 0 | |
3207 | :type-error "This field should contain an integer" | |
0b296dac RS |
3208 | :match-alternatives '(integerp)) |
3209 | ||
3210 | (define-widget 'number 'restricted-sexp | |
3211 | "A floating point number." | |
3212 | :tag "Number" | |
3213 | :value 0.0 | |
3214 | :type-error "This field should contain a number" | |
3215 | :match-alternatives '(numberp)) | |
d543e20b | 3216 | |
a3c88c59 | 3217 | (define-widget 'character 'editable-field |
0b296dac | 3218 | "A character." |
d543e20b PA |
3219 | :tag "Character" |
3220 | :value 0 | |
3221 | :size 1 | |
3222 | :format "%{%t%}: %v\n" | |
6d528fc5 PA |
3223 | :valid-regexp "\\`.\\'" |
3224 | :error "This field should contain a single character" | |
d543e20b | 3225 | :value-to-internal (lambda (widget value) |
a3c88c59 PA |
3226 | (if (stringp value) |
3227 | value | |
3228 | (char-to-string value))) | |
d543e20b PA |
3229 | :value-to-external (lambda (widget value) |
3230 | (if (stringp value) | |
3231 | (aref value 0) | |
3232 | value)) | |
a3c88c59 PA |
3233 | :match (lambda (widget value) |
3234 | (if (fboundp 'characterp) | |
3235 | (characterp value) | |
3236 | (integerp value)))) | |
d543e20b | 3237 | |
d543e20b PA |
3238 | (define-widget 'list 'group |
3239 | "A lisp list." | |
3240 | :tag "List" | |
3241 | :format "%{%t%}:\n%v") | |
3242 | ||
3243 | (define-widget 'vector 'group | |
3244 | "A lisp vector." | |
3245 | :tag "Vector" | |
3246 | :format "%{%t%}:\n%v" | |
3247 | :match 'widget-vector-match | |
3248 | :value-to-internal (lambda (widget value) (append value nil)) | |
3249 | :value-to-external (lambda (widget value) (apply 'vector value))) | |
3250 | ||
3251 | (defun widget-vector-match (widget value) | |
3252 | (and (vectorp value) | |
3253 | (widget-group-match widget | |
bd042c03 | 3254 | (widget-apply widget :value-to-internal value)))) |
d543e20b PA |
3255 | |
3256 | (define-widget 'cons 'group | |
3257 | "A cons-cell." | |
3258 | :tag "Cons-cell" | |
3259 | :format "%{%t%}:\n%v" | |
3260 | :match 'widget-cons-match | |
3261 | :value-to-internal (lambda (widget value) | |
3262 | (list (car value) (cdr value))) | |
3263 | :value-to-external (lambda (widget value) | |
3264 | (cons (nth 0 value) (nth 1 value)))) | |
3265 | ||
3266 | (defun widget-cons-match (widget value) | |
3267 | (and (consp value) | |
3268 | (widget-group-match widget | |
3269 | (widget-apply widget :value-to-internal value)))) | |
3270 | ||
3271 | (define-widget 'choice 'menu-choice | |
3272 | "A union of several sexp types." | |
3273 | :tag "Choice" | |
c6753d66 | 3274 | :format "%{%t%}: %[Value Menu%] %v" |
8697863a PA |
3275 | :button-prefix 'widget-push-button-prefix |
3276 | :button-suffix 'widget-push-button-suffix | |
a3c88c59 PA |
3277 | :prompt-value 'widget-choice-prompt-value) |
3278 | ||
3279 | (defun widget-choice-prompt-value (widget prompt value unbound) | |
3280 | "Make a choice." | |
3281 | (let ((args (widget-get widget :args)) | |
3282 | (completion-ignore-case (widget-get widget :case-fold)) | |
3283 | current choices old) | |
3284 | ;; Find the first arg that match VALUE. | |
3285 | (let ((look args)) | |
3286 | (while look | |
3287 | (if (widget-apply (car look) :match value) | |
3288 | (setq old (car look) | |
3289 | look nil) | |
3290 | (setq look (cdr look))))) | |
3291 | ;; Find new choice. | |
3292 | (setq current | |
3293 | (cond ((= (length args) 0) | |
3294 | nil) | |
3295 | ((= (length args) 1) | |
3296 | (nth 0 args)) | |
3297 | ((and (= (length args) 2) | |
3298 | (memq old args)) | |
3299 | (if (eq old (nth 0 args)) | |
3300 | (nth 1 args) | |
3301 | (nth 0 args))) | |
3302 | (t | |
3303 | (while args | |
3304 | (setq current (car args) | |
3305 | args (cdr args)) | |
3306 | (setq choices | |
3307 | (cons (cons (widget-apply current :menu-tag-get) | |
3308 | current) | |
3309 | choices))) | |
3310 | (let ((val (completing-read prompt choices nil t))) | |
3311 | (if (stringp val) | |
3312 | (let ((try (try-completion val choices))) | |
3313 | (when (stringp try) | |
3314 | (setq val try)) | |
3315 | (cdr (assoc val choices))) | |
3316 | nil))))) | |
3317 | (if current | |
3318 | (widget-prompt-value current prompt nil t) | |
3319 | value))) | |
d543e20b PA |
3320 | |
3321 | (define-widget 'radio 'radio-button-choice | |
3322 | "A union of several sexp types." | |
3323 | :tag "Choice" | |
a3c88c59 PA |
3324 | :format "%{%t%}:\n%v" |
3325 | :prompt-value 'widget-choice-prompt-value) | |
d543e20b PA |
3326 | |
3327 | (define-widget 'repeat 'editable-list | |
3328 | "A variable length homogeneous list." | |
3329 | :tag "Repeat" | |
3330 | :format "%{%t%}:\n%v%i\n") | |
3331 | ||
3332 | (define-widget 'set 'checklist | |
3333 | "A list of members from a fixed set." | |
3334 | :tag "Set" | |
3335 | :format "%{%t%}:\n%v") | |
3336 | ||
3337 | (define-widget 'boolean 'toggle | |
3338 | "To be nil or non-nil, that is the question." | |
3339 | :tag "Boolean" | |
6d528fc5 | 3340 | :prompt-value 'widget-boolean-prompt-value |
8697863a PA |
3341 | :button-prefix 'widget-push-button-prefix |
3342 | :button-suffix 'widget-push-button-suffix | |
c6753d66 RS |
3343 | :format "%{%t%}: %[Toggle%] %v\n" |
3344 | :on "on (non-nil)" | |
3345 | :off "off (nil)") | |
d543e20b | 3346 | |
6d528fc5 PA |
3347 | (defun widget-boolean-prompt-value (widget prompt value unbound) |
3348 | ;; Toggle a boolean. | |
a3c88c59 | 3349 | (y-or-n-p prompt)) |
6d528fc5 | 3350 | |
d543e20b PA |
3351 | ;;; The `color' Widget. |
3352 | ||
0f648ca2 PA |
3353 | (define-widget 'color 'editable-field |
3354 | "Choose a color name (with sample)." | |
3355 | :format "%t: %v (%{sample%})\n" | |
3356 | :size 10 | |
3357 | :tag "Color" | |
3358 | :value "black" | |
3359 | :complete 'widget-color-complete | |
3360 | :sample-face-get 'widget-color-sample-face-get | |
3361 | :notify 'widget-color-notify | |
3362 | :action 'widget-color-action) | |
3363 | ||
3364 | (defun widget-color-complete (widget) | |
3365 | "Complete the color in WIDGET." | |
3366 | (let* ((prefix (buffer-substring-no-properties (widget-field-start widget) | |
3367 | (point))) | |
3368 | (list (widget-color-choice-list)) | |
3369 | (completion (try-completion prefix list))) | |
3370 | (cond ((eq completion t) | |
3371 | (message "Exact match.")) | |
3372 | ((null completion) | |
3373 | (error "Can't find completion for \"%s\"" prefix)) | |
3374 | ((not (string-equal prefix completion)) | |
3375 | (insert-and-inherit (substring completion (length prefix)))) | |
3376 | (t | |
3377 | (message "Making completion list...") | |
3378 | (let ((list (all-completions prefix list nil))) | |
3379 | (with-output-to-temp-buffer "*Completions*" | |
3380 | (display-completion-list list))) | |
3381 | (message "Making completion list...done"))))) | |
d543e20b | 3382 | |
0f648ca2 | 3383 | (defun widget-color-sample-face-get (widget) |
4ee1cf9f PA |
3384 | (let* ((value (condition-case nil |
3385 | (widget-value widget) | |
3386 | (error (widget-get widget :value)))) | |
3387 | (symbol (intern (concat "fg:" value)))) | |
25ac13b5 PA |
3388 | (if (string-match "XEmacs" emacs-version) |
3389 | (prog1 symbol | |
3390 | (or (find-face symbol) | |
4ee1cf9f | 3391 | (set-face-foreground (make-face symbol) value))) |
25ac13b5 PA |
3392 | (condition-case nil |
3393 | (facemenu-get-face symbol) | |
3394 | (error 'default))))) | |
d543e20b | 3395 | |
d543e20b PA |
3396 | (defvar widget-color-choice-list nil) |
3397 | ;; Variable holding the possible colors. | |
3398 | ||
3399 | (defun widget-color-choice-list () | |
3400 | (unless widget-color-choice-list | |
3401 | (setq widget-color-choice-list | |
0f648ca2 PA |
3402 | (if (fboundp 'read-color-completion-table) |
3403 | (read-color-completion-table) | |
3404 | (mapcar '(lambda (color) (list color)) | |
3405 | (x-defined-colors))))) | |
d543e20b PA |
3406 | widget-color-choice-list) |
3407 | ||
d543e20b PA |
3408 | (defvar widget-color-history nil |
3409 | "History of entered colors") | |
3410 | ||
3411 | (defun widget-color-action (widget &optional event) | |
3412 | ;; Prompt for a color. | |
3413 | (let* ((tag (widget-apply widget :menu-tag-get)) | |
3414 | (prompt (concat tag ": ")) | |
4ee1cf9f PA |
3415 | (value (widget-value widget)) |
3416 | (start (widget-field-start widget)) | |
3417 | (pos (cond ((< (point) start) | |
3418 | 0) | |
3419 | ((> (point) (+ start (length value))) | |
3420 | (length value)) | |
3421 | (t | |
3422 | (- (point) start)))) | |
3423 | (answer (if (commandp 'read-color) | |
3424 | (read-color prompt) | |
3425 | (completing-read (concat tag ": ") | |
3426 | (widget-color-choice-list) | |
3427 | nil nil | |
3428 | (cons value pos) | |
3429 | 'widget-color-history)))) | |
d543e20b PA |
3430 | (unless (zerop (length answer)) |
3431 | (widget-value-set widget answer) | |
0a3a0b56 PA |
3432 | (widget-setup) |
3433 | (widget-apply widget :notify widget event)))) | |
d543e20b | 3434 | |
0f648ca2 PA |
3435 | (defun widget-color-notify (widget child &optional event) |
3436 | "Update the sample, and notofy the parent." | |
3437 | (overlay-put (widget-get widget :sample-overlay) | |
3438 | 'face (widget-apply widget :sample-face-get)) | |
3439 | (widget-default-notify widget child event)) | |
2f477381 | 3440 | |
d543e20b PA |
3441 | ;;; The Help Echo |
3442 | ||
3443 | (defun widget-echo-help-mouse () | |
3444 | "Display the help message for the widget under the mouse. | |
3445 | Enable with (run-with-idle-timer 1 t 'widget-echo-help-mouse)" | |
3446 | (let* ((pos (mouse-position)) | |
3447 | (frame (car pos)) | |
3448 | (x (car (cdr pos))) | |
3449 | (y (cdr (cdr pos))) | |
3450 | (win (window-at x y frame)) | |
3451 | (where (coordinates-in-window-p (cons x y) win))) | |
3452 | (when (consp where) | |
3453 | (save-window-excursion | |
3454 | (progn ; save-excursion | |
3455 | (select-window win) | |
3456 | (let* ((result (compute-motion (window-start win) | |
3457 | '(0 . 0) | |
3458 | (window-end win) | |
3459 | where | |
3460 | (window-width win) | |
3461 | (cons (window-hscroll) 0) | |
3462 | win))) | |
3463 | (when (and (eq (nth 1 result) x) | |
3464 | (eq (nth 2 result) y)) | |
3465 | (widget-echo-help (nth 0 result)))))))) | |
3466 | (unless track-mouse | |
3467 | (setq track-mouse t) | |
3468 | (add-hook 'post-command-hook 'widget-stop-mouse-tracking))) | |
3469 | ||
3470 | (defun widget-stop-mouse-tracking (&rest args) | |
3471 | "Stop the mouse tracking done while idle." | |
3472 | (remove-hook 'post-command-hook 'widget-stop-mouse-tracking) | |
3473 | (setq track-mouse nil)) | |
3474 | ||
3475 | (defun widget-at (pos) | |
3476 | "The button or field at POS." | |
0a3a0b56 PA |
3477 | (or (get-char-property pos 'button) |
3478 | (get-char-property pos 'field))) | |
d543e20b PA |
3479 | |
3480 | (defun widget-echo-help (pos) | |
3481 | "Display the help echo for widget at POS." | |
3482 | (let* ((widget (widget-at pos)) | |
3483 | (help-echo (and widget (widget-get widget :help-echo)))) | |
3484 | (cond ((stringp help-echo) | |
3485 | (message "%s" help-echo)) | |
3486 | ((and (symbolp help-echo) (fboundp help-echo) | |
3487 | (stringp (setq help-echo (funcall help-echo widget)))) | |
3488 | (message "%s" help-echo))))) | |
3489 | ||
3490 | ;;; The End: | |
3491 | ||
3492 | (provide 'wid-edit) | |
3493 | ||
3494 | ;; wid-edit.el ends here |