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14239447 | 1 | ;; allout-widgets.el --- Visually highlight allout outline structure. |
aac7a935 KM |
2 | |
3 | ;; Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Ken Manheimer | |
4 | ||
5 | ;; Author: Ken Manheimer <ken dot manheimer at gmail dot com> | |
6 | ;; Maintainer: Ken Manheimer <ken dot manheimer at gmail dot com> | |
7 | ;; Version: 1.0 | |
8 | ;; Created: Dec 2005 | |
9 | ;; Version: 1.0 | |
10 | ;; Keywords: outlines | |
11 | ;; Website: http://myriadicity.net/Sundry/EmacsAllout | |
12 | ||
13 | ;;; Commentary: | |
14 | ||
15 | ;; This is an allout outline-mode add-on that highlights outline structure | |
16 | ;; with graphical widgets. | |
17 | ;; | |
18 | ;; To activate, customize `allout-widgets-auto-activation'. You can also | |
19 | ;; invoke allout-widgets-mode in a particular allout buffer. When | |
20 | ;; auto-enabled, you can inhibit widget operation in particular allout | |
21 | ;; buffers by setting the variable `allout-widgets-mode-inhibit' non-nil in | |
22 | ;; that file's buffer. Use emacs *file local variables* to generally | |
23 | ;; inhibit for a file. | |
24 | ;; | |
25 | ;; See the `allout-widgets-mode' docstring for more details. | |
26 | ;; | |
27 | ;; Info about allout and allout-widgets development are available at | |
28 | ;; http://myriadicity.net/Sundry/EmacsAllout | |
29 | ;; | |
30 | ;; The graphics include: | |
31 | ;; | |
32 | ;; - icons for item bullets, varying to distinguish whether the item either | |
33 | ;; lacks any subitems, the subitems are currently collapsed within the | |
34 | ;; item, or the item is currently expanded. | |
35 | ;; | |
36 | ;; - guide lines connecting item bullet-icons with those of their subitems. | |
37 | ;; | |
38 | ;; - cue area between the bullet-icon and the start of the body headline, | |
39 | ;; for item numbering, encryption indicator, and distinctive bullets. | |
40 | ;; | |
41 | ;; The bullet-icon and guide line graphics provide keybindings and mouse | |
42 | ;; bindings for easy outline navigation and exposure control, extending | |
43 | ;; outline hot-spot navigation (see `allout-mode' docstring for details). | |
44 | ;; | |
45 | ;; Developers note: Our use of emacs widgets is unconventional. We | |
46 | ;; decorate existing text rather than substituting for it, to | |
47 | ;; piggy-back on existing allout operation. This employs the C-coded | |
48 | ;; efficiencies of widget-apply, widget-get, and widget-put, along | |
49 | ;; with the basic object-oriented organization of widget-create, to | |
50 | ;; systematically couple overlays, graphics, and other features with | |
51 | ;; allout-governed text. | |
52 | ||
53 | ;;;_: Code (structured with comments that delinieate an allout outline) | |
54 | ||
55 | ;;;_ : General Environment | |
56 | (require 'allout) | |
57 | (require 'widget) | |
58 | (require 'wid-edit) | |
59 | ||
60 | (eval-when-compile | |
61 | (progn | |
62 | (require 'overlay) | |
63 | (require 'cl) | |
64 | )) | |
65 | ||
66 | ;;;_ : internal variables needed before user-customization variables | |
67 | ;;; In order to enable activation of allout-widgets-mode via customization, | |
68 | ;;; allout-widgets-auto-activation uses a setting function. That function | |
69 | ;;; is invoked when the customization variable definition is evaluated, | |
70 | ;;; during file load, so the involved code must reside above that | |
71 | ;;; definition in the file. | |
72 | ;;;_ = allout-widgets-mode | |
73 | (defvar allout-widgets-mode nil | |
74 | "Allout mode enhanced with graphical widgets.") | |
75 | (make-variable-buffer-local 'allout-widgets-mode) | |
76 | ||
77 | ;;;_ : USER CUSTOMIZATION VARIABLES and incidental functions: | |
78 | ;;;_ > defgroup allout-widgets | |
79 | ;;;###autoload | |
80 | (defgroup allout-widgets nil | |
81 | "Allout extension that highlights outline structure graphically. | |
82 | ||
83 | Customize `allout-widgets-auto-activation' to activate allout-widgets | |
84 | with allout-mode." | |
85 | :group 'allout) | |
86 | ;;;_ > defgroup allout-widgets-developer | |
87 | (defgroup allout-widgets-developer nil | |
88 | "Settings for development of allout widgets extension." | |
89 | :group 'allout-widgets) | |
90 | ;;;_ ; some functions a bit early, for allout-auto-activation dependency: | |
91 | ;;;_ > allout-widgets-mode-enable | |
92 | (defun allout-widgets-mode-enable () | |
93 | "Enable allout-widgets-mode in allout-mode buffers. | |
94 | ||
95 | See `allout-widgets-mode-inhibit' for per-file/per-buffer | |
96 | inhibition of allout-widgets-mode." | |
97 | (add-hook 'allout-mode-off-hook 'allout-widgets-mode-off) | |
98 | (add-hook 'allout-mode-on-hook 'allout-widgets-mode-on) | |
99 | t) | |
100 | ;;;_ > allout-widgets-mode-disable | |
101 | (defun allout-widgets-mode-disable () | |
102 | "Disable allout-widgets-mode in allout-mode buffers. | |
103 | ||
104 | See `allout-widgets-mode-inhibit' for per-file/per-buffer | |
105 | inhibition of allout-widgets-mode." | |
106 | (remove-hook 'allout-mode-off-hook 'allout-widgets-mode-off) | |
107 | (remove-hook 'allout-mode-on-hook 'allout-widgets-mode-on) | |
108 | t) | |
109 | ;;;_ > allout-widgets-setup (varname value) | |
110 | ;;;###autoload | |
111 | (defun allout-widgets-setup (varname value) | |
112 | "Commission or decommision allout-widgets-mode along with allout-mode. | |
113 | ||
114 | Meant to be used by customization of `allout-widgets-auto-activation'." | |
115 | (set-default varname value) | |
116 | (if allout-widgets-auto-activation | |
117 | (allout-widgets-mode-enable) | |
118 | (allout-widgets-mode-disable))) | |
119 | ;;;_ = allout-widgets-auto-activation | |
120 | ;;;###autoload | |
121 | (defcustom allout-widgets-auto-activation nil | |
122 | "Activate to enable allout icon graphics wherever allout mode is active. | |
123 | ||
124 | Also enable `allout-auto-activation' for this to take effect upon | |
125 | visiting an outline. | |
126 | ||
127 | When this is set you can disable allout widgets in select files | |
128 | by setting `allout-widgets-mode-inhibit' | |
129 | ||
130 | Instead of setting `allout-widgets-auto-activation' you can | |
131 | explicitly invoke `allout-widgets-mode' in allout buffers where | |
132 | you want allout widgets operation. | |
133 | ||
134 | See `allout-widgets-mode' for allout widgets mode features." | |
135 | :type 'boolean | |
136 | :group 'allout-widgets | |
137 | :set 'allout-widgets-setup | |
138 | ) | |
139 | ;; ;;;_ = allout-widgets-allow-unruly-edits | |
140 | ;; (defcustom allout-widgets-allow-unruly-edits nil | |
141 | ;; "*Control whether manual edits are restricted to maintain outline integrity. | |
142 | ||
143 | ;; When nil, manual edits must either be within an item's body or encompass | |
144 | ;; one or more items completely - eg, killing topics as entities, rather than | |
145 | ;; deleting from the middle of one to the middle of another. | |
146 | ||
147 | ;; If you only occasionally need to make unrestricted change, you can set this | |
148 | ;; variable in the specific buffer using set-variable, or just deactivate | |
149 | ;; `allout-mode' temporarily. You can customize this to always allow unruly | |
150 | ;; edits, but you will be able to create outlines that are unnavigable in | |
151 | ;; principle, and not just for allout's navigation and exposure mechanisms." | |
152 | ;; :type 'boolean | |
153 | ;; :group allout-widgets) | |
154 | ;; (make-variable-buffer-local 'allout-widgets-allow-unruly-edits) | |
155 | ;;;_ = allout-widgets-auto-activation - below, for eval-order dependencies | |
156 | ;;;_ = allout-widgets-icons-dark-subdir | |
3a00a363 | 157 | (defcustom allout-widgets-icons-dark-subdir "icons/allout-widgets/dark-bg/" |
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158 | "Directory on `image-load-path' holding allout icons for dark backgrounds." |
159 | :type 'string | |
160 | :group 'allout-widgets) | |
161 | ;;;_ = allout-widgets-icons-light-subdir | |
3a00a363 | 162 | (defcustom allout-widgets-icons-light-subdir "icons/allout-widgets/light-bg/" |
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163 | "Directory on `image-load-path' holding allout icons for light backgrounds." |
164 | :type 'string | |
165 | :group 'allout-widgets) | |
166 | ;;;_ = allout-widgets-icon-types | |
167 | (defcustom allout-widgets-icon-types '(xpm png) | |
168 | "File extensions for the icon graphic format types, in order of preference." | |
169 | :type '(repeat symbol) | |
170 | :group 'allout-widgets) | |
171 | ||
172 | ;;;_ . Decoration format | |
173 | ;;;_ = allout-widgets-theme-dark-background | |
174 | (defcustom allout-widgets-theme-dark-background "allout-dark-bg" | |
175 | "Identify the outline's icon theme to use with a dark background." | |
176 | :type '(string) | |
177 | :group 'allout-widgets) | |
178 | ;;;_ = allout-widgets-theme-light-background | |
179 | (defcustom allout-widgets-theme-light-background "allout-light-bg" | |
180 | "Identify the outline's icon theme to use with a light background." | |
181 | :type '(string) | |
182 | :group 'allout-widgets) | |
183 | ;;;_ = allout-widgets-item-image-properties-emacs | |
184 | (defcustom allout-widgets-item-image-properties-emacs | |
185 | '(:ascent center :mask (heuristic t)) | |
186 | "*Default properties item widget images in mainline Emacs." | |
187 | :type 'plist | |
188 | :group 'allout-widgets) | |
189 | ;;;_ = allout-widgets-item-image-properties-xemacs | |
190 | (defcustom allout-widgets-item-image-properties-xemacs | |
191 | nil | |
192 | "*Default properties item widget images in XEmacs." | |
193 | :type 'plist | |
194 | :group 'allout-widgets) | |
195 | ;;;_ . Developer | |
196 | ;;;_ = allout-widgets-run-unit-tests-on-load | |
197 | (defcustom allout-widgets-run-unit-tests-on-load nil | |
198 | "*When non-nil, unit tests will be run at end of loading allout-widgets. | |
199 | ||
200 | Generally, allout widgets code developers are the only ones who'll want to | |
201 | set this. | |
202 | ||
203 | \(If set, this makes it an even better practice to exercise changes by | |
204 | doing byte-compilation with a repeat count, so the file is loaded after | |
205 | compilation.) | |
206 | ||
207 | See `allout-widgets-run-unit-tests' to see what's run." | |
208 | :type 'boolean | |
209 | :group 'allout-widgets-developer) | |
210 | ;;;_ = allout-widgets-time-decoration-activity | |
211 | (defcustom allout-widgets-time-decoration-activity nil | |
212 | "*Retain timing info of the last cooperative redecoration. | |
213 | ||
214 | The details are retained as the value of | |
215 | `allout-widgets-last-decoration-timing'. | |
216 | ||
217 | Generally, allout widgets code developers are the only ones who'll want to | |
218 | set this." | |
219 | :type 'boolean | |
220 | :group 'allout-widgets-developer) | |
221 | ;;;_ = allout-widgets-hook-error-post-time 0 | |
222 | (defcustom allout-widgets-hook-error-post-time 0 | |
223 | "*Amount of time to sit showing hook error messages. | |
224 | ||
225 | 0 is minimal, or nil to not post to the message area. | |
226 | ||
227 | This is for debugging purposes." | |
228 | :type 'integer | |
229 | :group 'allout-widgets-developer) | |
230 | ;;;_ = allout-widgets-maintain-tally nil | |
231 | (defcustom allout-widgets-maintain-tally nil | |
232 | "*If non-nil, maintain a collection of widgets, `allout-widgets-tally'. | |
233 | ||
234 | This is for debugging purposes. | |
235 | ||
236 | The tally shows the total number of item widgets in the current | |
237 | buffer, and tracking increases as new widgets are added and | |
238 | decreases as obsolete widgets are garbage collected." | |
239 | :type 'boolean | |
240 | :group 'allout-widgets-developer) | |
d806ab68 | 241 | (defvar allout-widgets-tally nil |
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242 | "Hash-table of existing allout widgets, for debugging. |
243 | ||
244 | Table is maintained iff `allout-widgets-maintain-tally' is non-nil. | |
245 | ||
246 | The table contents will be out of sync if any widgets are created | |
247 | or deleted while this variable is nil.") | |
248 | (make-variable-buffer-local 'allout-widgets-tally) | |
b8296902 | 249 | (defvar allout-widgets-mode-inhibit) ; defined below |
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250 | ;;;_ > allout-widgets-tally-string |
251 | (defun allout-widgets-tally-string () | |
252 | "Return a string giving the number of tracked widgets, or empty string if not tracking. | |
253 | ||
254 | The string is formed for appending to the allout-mode mode-line lighter. | |
255 | ||
256 | An empty string is also returned if tracking is inhibited or | |
257 | widgets are locally inhibited. | |
258 | ||
259 | The number varies according to the evanescence of objects on a | |
260 | hash table with weak keys, so tracking of widget erasures is often delayed." | |
261 | (when (and allout-widgets-maintain-tally (not allout-widgets-mode-inhibit)) | |
262 | (format ":%s" (hash-table-count allout-widgets-tally)))) | |
263 | ;;;_ = allout-widgets-track-decoration nil | |
264 | (defcustom allout-widgets-track-decoration nil | |
265 | "*If non-nil, show cursor position of each item decoration. | |
266 | ||
267 | This is for debugging purposes, and generally set at need in a | |
268 | buffer rather than as a prevailing configuration \(but it's handy | |
269 | to publicize it by making it a customization variable\)." | |
270 | :type 'boolean | |
271 | :group 'allout-widgets-developer) | |
272 | (make-variable-buffer-local 'allout-widgets-track-decoration) | |
273 | ||
274 | ;;;_ : Mode context - variables, hookup, and hooks | |
275 | ;;;_ . internal mode variables | |
276 | ;;;_ , Mode activation and environment | |
277 | ;;;_ = allout-widgets-version | |
278 | (defvar allout-widgets-version "1.0" | |
279 | "Version of currently loaded allout-widgets extension.") | |
280 | ;;;_ > allout-widgets-version | |
281 | (defun allout-widgets-version (&optional here) | |
282 | "Return string describing the loaded outline version." | |
283 | (interactive "P") | |
284 | (let ((msg (concat "Allout Outline Widgets Extension v " | |
285 | allout-widgets-version))) | |
286 | (if here (insert msg)) | |
287 | (message "%s" msg) | |
288 | msg)) | |
289 | ;;;_ = allout-widgets-mode-inhibit | |
290 | (defvar allout-widgets-mode-inhibit nil | |
291 | "Inhibit `allout-widgets-mode' from activating widgets. | |
292 | ||
293 | This also inhibits automatic adjustment of widgets to track allout outline | |
294 | changes. | |
295 | ||
296 | You can use this as a file local variable setting to disable | |
297 | allout widgets enhancements in selected buffers while generally | |
298 | enabling widgets by customizing `allout-widgets-auto-activation'. | |
299 | ||
300 | In addition, you can invoked `allout-widgets-mode' allout-mode | |
301 | buffers where this is set to enable and disable widget | |
302 | enhancements, directly.") | |
303 | ;;;###autoload | |
304 | (put 'allout-widgets-mode-inhibit 'safe-local-variable | |
4f91a816 | 305 | (if (fboundp 'booleanp) 'booleanp (lambda (x) (member x '(t nil))))) |
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306 | (make-variable-buffer-local 'allout-widgets-mode-inhibit) |
307 | ;;;_ = allout-inhibit-body-modification-hook | |
308 | (defvar allout-inhibit-body-modification-hook nil | |
309 | "Override de-escaping of text-prefixes in item bodies during specific changes. | |
310 | ||
311 | This is used by `allout-buffer-modification-handler' to signal such changes | |
312 | to `allout-body-modification-handler', and is always reset by | |
313 | `allout-post-command-business'.") | |
314 | (make-variable-buffer-local 'allout-inhibit-body-modification-hook) | |
315 | ;;;_ = allout-widgets-icons-cache | |
316 | (defvar allout-widgets-icons-cache nil | |
317 | "Cache allout icon images, as an association list. | |
318 | ||
319 | `allout-fetch-icon-image' uses this cache transparently, keying | |
320 | images with lists containing the name of the icon directory \(as | |
321 | found on the `load-path') and the icon name. | |
322 | ||
323 | Set this variable to `nil' to empty the cache, and have it replenish from the | |
324 | filesystem.") | |
325 | ;;;_ = allout-widgets-unset-inhibit-read-only | |
326 | (defvar allout-widgets-unset-inhibit-read-only nil | |
327 | "Tell `allout-widgets-post-command-business' to unset `inhibit-read-only'. | |
328 | ||
329 | Used by `allout-graphics-modification-handler'") | |
330 | ;;;_ = allout-widgets-reenable-before-change-handler | |
331 | (defvar allout-widgets-reenable-before-change-handler nil | |
332 | "Tell `allout-widgets-post-command-business' to reequip the handler. | |
333 | ||
334 | Necessary because the handler sometimes deliberately raises an | |
335 | error, causing it to be disabled.") | |
336 | ;;;_ , State for hooks | |
337 | ;;;_ = allout-unresolved-body-mod-workroster | |
338 | (defvar allout-unresolved-body-mod-workroster (make-hash-table :size 16) | |
339 | "List of body-overlays that did before-change business but not after-change. | |
340 | ||
341 | See `allout-post-command-business' and `allout-body-modification-handler'.") | |
342 | ;;;_ = allout-structure-unruly-deletion-message | |
343 | (defvar allout-structure-unruly-deletion-message | |
344 | "Unruly edit prevented -- | |
345 | To change the bullet character: \\[allout-rebullet-current-heading] | |
346 | To promote this item: \\[allout-shift-out] | |
347 | To demote it: \\[allout-shift-in] | |
348 | To delete it and offspring: \\[allout-kill-topic] | |
349 | See \\[describe-mode] for many more options." | |
350 | "Informative message presented on improper editing of outline structure. | |
351 | ||
352 | The structure includes the guides lines, bullet, and bullet cue.") | |
353 | ;;;_ = allout-widgets-changes-record | |
354 | (defvar allout-widgets-changes-record nil | |
355 | "Record outline changes for processing by post-command hook. | |
356 | ||
357 | Entries on the list are lists whose first element is a symbol indicating | |
358 | the change type and subsequent elements are data specific to that change | |
359 | type. Specifically: | |
360 | ||
361 | 'exposure `allout-exposure-from' `allout-exposure-to' `allout-exposure-flag' | |
362 | ||
363 | The changes are recorded in reverse order, with new values pushed | |
364 | onto the front.") | |
365 | (make-variable-buffer-local 'allout-widgets-changes-record) | |
366 | ;;;_ = allout-widgets-undo-exposure-record | |
367 | (defvar allout-widgets-undo-exposure-record nil | |
368 | "Record outline undo traces for processing by post-command hook. | |
369 | ||
370 | The changes are recorded in reverse order, with new values pushed | |
371 | onto the front.") | |
372 | (make-variable-buffer-local 'allout-widgets-undo-exposure-record) | |
373 | ;;;_ = allout-widgets-last-hook-error | |
374 | (defvar allout-widgets-last-hook-error nil | |
375 | "String holding last error string, for debugging purposes.") | |
376 | ;;;_ = allout-widgets-adjust-message-length-threshold 100 | |
377 | (defvar allout-widgets-adjust-message-length-threshold 100 | |
378 | "Display \"Adjusting widgets\" message above this number of pending changes." | |
379 | ) | |
380 | ;;;_ = allout-widgets-adjust-message-size-threshold 10000 | |
381 | (defvar allout-widgets-adjust-message-size-threshold 10000 | |
382 | "Display \"Adjusting widgets\" message above this size of pending changes." | |
383 | ) | |
384 | ;;;_ = allout-doing-exposure-undo-processor nil | |
385 | (defvar allout-undo-exposure-in-progress nil | |
386 | "Maintained true during `allout-widgets-exposure-undo-processor'") | |
387 | ;;;_ , Widget-specific outline text format | |
388 | ;;;_ = allout-escaped-prefix-regexp | |
389 | (defvar allout-escaped-prefix-regexp "" | |
390 | "*Regular expression for body text that would look like an item prefix if | |
391 | not altered with an escape sequence.") | |
392 | (make-variable-buffer-local 'allout-escaped-prefix-regexp) | |
393 | ;;;_ , Widget element formatting | |
394 | ;;;_ = allout-item-icon-keymap | |
395 | (defvar allout-item-icon-keymap | |
396 | (let ((km (make-sparse-keymap))) | |
397 | (dolist (digit '("0" "1" "2" "3" | |
398 | "4" "5" "6" "7" "8" "9")) | |
399 | (define-key km digit 'digit-argument)) | |
400 | (define-key km "-" 'negative-argument) | |
401 | ;; (define-key km [(return)] 'allout-tree-expand-command) | |
402 | ;; (define-key km [(meta return)] 'allout-toggle-torso-command) | |
403 | ;; (define-key km [(down-mouse-1)] 'allout-item-button-click) | |
404 | ;; (define-key km [(down-mouse-2)] 'allout-toggle-torso-event-command) | |
405 | ;; Override underlying mouse-1 and mouse-2 bindings in icon territory: | |
406 | (define-key km [(mouse-1)] (lambda () (interactive) nil)) | |
407 | (define-key km [(mouse-2)] (lambda () (interactive) nil)) | |
408 | ||
409 | ;; Catchall, handles actual keybindings, dynamically doing keymap lookups: | |
410 | (define-key km [t] 'allout-item-icon-key-handler) | |
411 | ||
412 | km) | |
413 | "General tree-node key bindings.") | |
414 | ;;;_ = allout-item-body-keymap | |
415 | (defvar allout-item-body-keymap | |
416 | (let ((km (make-sparse-keymap)) | |
417 | (local-map (current-local-map))) | |
418 | ;; (define-key km [(control return)] 'allout-tree-expand-command) | |
419 | ;; (define-key km [(meta return)] 'allout-toggle-torso-command) | |
420 | ;; XXX We need to reset this per buffer's mode; we do so in | |
421 | ;; allout-widgets-mode. | |
422 | (if local-map | |
423 | (set-keymap-parent km local-map)) | |
424 | ||
425 | km) | |
426 | "General key bindings for the text content of outline items.") | |
427 | (make-variable-buffer-local 'allout-item-body-keymap) | |
428 | ;;;_ = allout-body-span-category | |
429 | (defvar allout-body-span-category nil | |
430 | "Symbol carrying allout body-text overlay properties.") | |
431 | ;;;_ = allout-cue-span-keymap | |
432 | (defvar allout-cue-span-keymap | |
433 | (let ((km (make-sparse-keymap))) | |
434 | (set-keymap-parent km allout-item-icon-keymap) | |
435 | km) | |
436 | "Keymap used in the item cue area - the space between the icon and headline.") | |
437 | ;;;_ = allout-escapes-category | |
438 | (defvar allout-escapes-category nil | |
439 | "Symbol for category of text property used to hide escapes of prefix-like | |
440 | text in allout item bodies.") | |
441 | ;;;_ = allout-guides-category | |
442 | (defvar allout-guides-category nil | |
443 | "Symbol carrying allout icon-guides overlay properties.") | |
444 | ;;;_ = allout-guides-span-category | |
445 | (defvar allout-guides-span-category nil | |
446 | "Symbol carrying allout icon and guide lines overlay properties.") | |
447 | ;;;_ = allout-icon-span-category | |
448 | (defvar allout-icon-span-category nil | |
449 | "Symbol carrying allout icon and guide lines overlay properties.") | |
450 | ;;;_ = allout-cue-span-category | |
451 | (defvar allout-cue-span-category nil | |
452 | "Symbol carrying common properties of the space following the outline icon. | |
453 | ||
454 | \(That space is used to convey selected cues indicating body qualities, | |
455 | including things like: | |
456 | - encryption '~' | |
457 | - numbering '#' | |
458 | - indirect reference '@' | |
459 | - distinctive bullets - see `allout-distinctive-bullets-string'.\)") | |
460 | ;;;_ = allout-span-to-category | |
461 | (defvar allout-span-to-category | |
462 | '((:guides-span . allout-guides-span-category) | |
463 | (:cue-span . allout-cue-span-category) | |
464 | (:icon-span . allout-icon-span-category) | |
465 | (:body-span . allout-body-span-category)) | |
466 | "Association list mapping span identifier to category identifier.") | |
467 | ;;;_ = allout-trailing-category | |
468 | (defvar allout-trailing-category nil | |
469 | "Symbol carrying common properties of an overlay's trailing newline.") | |
470 | ;;;_ , Developer | |
471 | (defvar allout-widgets-last-decoration-timing nil | |
472 | "Timing details for the last cooperative decoration action. | |
473 | ||
474 | This is maintained when `allout-widgets-time-decoration-activity' is set. | |
475 | ||
476 | The value is a list containing two elements: | |
477 | - the elapsed time as a number of seconds | |
478 | - the list of changes processed, a la `allout-widgets-changes-record'. | |
479 | ||
480 | When active, the value is revised each time automatic decoration activity | |
481 | happens in the buffer.") | |
482 | (make-variable-buffer-local 'allout-widgets-last-decoration-timing) | |
483 | ;;;_ . mode hookup | |
484 | ;;;_ > define-minor-mode allout-widgets-mode (arg) | |
485 | ;;;###autoload | |
486 | (define-minor-mode allout-widgets-mode | |
487 | "Allout-mode extension, providing graphical decoration of outline structure. | |
488 | ||
489 | This is meant to operate along with allout-mode, via `allout-mode-hook'. | |
490 | ||
491 | If optional argument ARG is greater than 0, enable. | |
492 | If optional argument ARG is less than 0, disable. | |
493 | Anything else, toggle between active and inactive. | |
494 | ||
495 | The graphics include: | |
496 | ||
497 | - guide lines connecting item bullet-icons with those of their subitems. | |
498 | ||
499 | - icons for item bullets, varying to indicate whether or not the item | |
500 | has subitems, and if so, whether or not the item is expanded. | |
501 | ||
502 | - cue area between the bullet-icon and the start of the body headline, | |
503 | for item numbering, encryption indicator, and distinctive bullets. | |
504 | ||
505 | The bullet-icon and guide line graphics provide keybindings and mouse | |
506 | bindings for easy outline navigation and exposure control, extending | |
507 | outline hot-spot navigation \(see `allout-mode')." | |
508 | ||
509 | :lighter nil | |
510 | :keymap nil | |
511 | ||
512 | ;; define-minor-mode handles any provided argument according to emacs | |
513 | ;; minor-mode conventions - '(elisp) Minor Mode Conventions' - and sets | |
514 | ;; allout-widgets-mode accordingly *before* running the body code, so we | |
515 | ;; cue on that. | |
516 | (if allout-widgets-mode | |
517 | ;; Activating: | |
518 | (progn | |
519 | (allout-add-resumptions | |
520 | ;; XXX user may need say in line-truncation/hscrolling - an option | |
521 | ;; that abstracts mode. | |
522 | ;; truncate text lines to keep guide lines intact: | |
523 | '(truncate-lines t) | |
524 | ;; and enable autoscrolling to ease view of text | |
525 | '(auto-hscroll-mode t) | |
526 | '(line-move-ignore-fields t) | |
527 | '(widget-push-button-prefix "") | |
528 | '(widget-push-button-suffix "") | |
529 | ;; allout-escaped-prefix-regexp depends on allout-regexp: | |
530 | (list 'allout-escaped-prefix-regexp (concat "\\(\\\\\\)" | |
531 | "\\(" allout-regexp "\\)"))) | |
532 | (allout-add-resumptions | |
533 | (list 'allout-widgets-tally allout-widgets-tally) | |
534 | (list 'allout-widgets-escapes-sanitization-regexp-pair | |
535 | (list (concat "\\(\n\\|\\`\\)" | |
536 | allout-escaped-prefix-regexp | |
537 | ) | |
538 | ;; Include everything but the escape symbol. | |
539 | "\\1\\3")) | |
540 | ) | |
541 | ||
542 | (add-hook 'after-change-functions 'allout-widgets-after-change-handler | |
543 | nil t) | |
544 | ||
545 | (allout-setup-text-properties) | |
546 | (add-to-invisibility-spec '(allout-torso . t)) | |
547 | (add-to-invisibility-spec 'allout-escapes) | |
548 | ||
549 | (if (current-local-map) | |
550 | (set-keymap-parent allout-item-body-keymap (current-local-map))) | |
551 | ||
552 | (add-hook 'allout-exposure-change-hook | |
553 | 'allout-widgets-exposure-change-recorder nil 'local) | |
554 | (add-hook 'allout-structure-added-hook | |
555 | 'allout-widgets-additions-recorder nil 'local) | |
556 | (add-hook 'allout-structure-deleted-hook | |
557 | 'allout-widgets-deletions-recorder nil 'local) | |
558 | (add-hook 'allout-structure-shifted-hook | |
559 | 'allout-widgets-shifts-recorder nil 'local) | |
560 | (add-hook 'allout-after-copy-or-kill-hook | |
561 | 'allout-widgets-after-copy-or-kill-function nil 'local) | |
562 | ||
563 | (add-hook 'before-change-functions 'allout-widgets-before-change-handler | |
564 | nil 'local) | |
565 | (add-hook 'post-command-hook 'allout-widgets-post-command-business | |
566 | nil 'local) | |
567 | (add-hook 'pre-command-hook 'allout-widgets-pre-command-business | |
568 | nil 'local) | |
569 | ||
570 | ;; init the widgets tally for debugging: | |
571 | (if (not allout-widgets-tally) | |
572 | (setq allout-widgets-tally (make-hash-table | |
573 | :test 'eq :weakness 'key))) | |
574 | ;; add tally count display on minor-mode-alist just after | |
575 | ;; allout-mode entry. | |
576 | ;; (we use ternary condition form to keep condition simple for deletion.) | |
577 | (let* ((mode-line-entry '(allout-widgets-mode-inhibit "" | |
578 | (:eval (allout-widgets-tally-string)))) | |
579 | (associated (assoc (car mode-line-entry) minor-mode-alist)) | |
580 | ;; need location for it only if not already present: | |
581 | (after (and (not associated) | |
582 | (memq (assq 'allout-mode minor-mode-alist) minor-mode-alist)))) | |
583 | (if after | |
584 | (rplacd after (cons mode-line-entry (cdr after))))) | |
585 | (allout-widgets-prepopulate-buffer) | |
586 | t) | |
587 | ;; Deactivating: | |
588 | (let ((inhibit-read-only t) | |
589 | (was-modified (buffer-modified-p))) | |
590 | ||
591 | (allout-widgets-undecorate-region (point-min)(point-max)) | |
592 | (remove-from-invisibility-spec '(allout-torso . t)) | |
593 | (remove-from-invisibility-spec 'allout-escapes) | |
594 | ||
595 | (remove-hook 'after-change-functions | |
596 | 'allout-widgets-after-change-handler 'local) | |
597 | (remove-hook 'allout-exposure-change-hook | |
598 | 'allout-widgets-exposure-change-recorder 'local) | |
599 | (remove-hook 'allout-structure-added-hook | |
600 | 'allout-widgets-additions-recorder 'local) | |
601 | (remove-hook 'allout-structure-deleted-hook | |
602 | 'allout-widgets-deletions-recorder 'local) | |
603 | (remove-hook 'allout-structure-shifted-hook | |
604 | 'allout-widgets-shifts-recorder 'local) | |
605 | (remove-hook 'allout-after-copy-or-kill-hook | |
606 | 'allout-widgets-after-copy-or-kill-function 'local) | |
607 | (remove-hook 'before-change-functions | |
608 | 'allout-widgets-before-change-handler 'local) | |
609 | (remove-hook 'post-command-hook | |
610 | 'allout-widgets-post-command-business 'local) | |
611 | (remove-hook 'pre-command-hook | |
612 | 'allout-widgets-pre-command-business 'local) | |
613 | (assq-delete-all 'allout-widgets-mode-inhibit minor-mode-alist) | |
614 | (set-buffer-modified-p was-modified)))) | |
615 | ;;;_ > allout-widgets-mode-off | |
616 | (defun allout-widgets-mode-off () | |
617 | "Explicitly disable allout-widgets-mode." | |
618 | (allout-widgets-mode -1)) | |
619 | ;;;_ > allout-widgets-mode-off | |
620 | (defun allout-widgets-mode-on () | |
621 | "Explicitly disable allout-widgets-mode." | |
622 | (allout-widgets-mode 1)) | |
623 | ;;;_ > allout-setup-text-properties () | |
624 | (defun allout-setup-text-properties () | |
625 | "Configure category and literal text properties." | |
626 | ||
627 | ;; XXX body - before-change, entry, keymap | |
628 | ||
629 | (setplist 'allout-guides-span-category nil) | |
630 | (put 'allout-guides-span-category | |
631 | 'modification-hooks '(allout-graphics-modification-handler)) | |
632 | (put 'allout-guides-span-category 'local-map allout-item-icon-keymap) | |
633 | (put 'allout-guides-span-category 'mouse-face widget-button-face) | |
634 | (put 'allout-guides-span-category 'field 'structure) | |
635 | ;; (put 'allout-guides-span-category 'face 'widget-button) | |
636 | ||
637 | (setplist 'allout-icon-span-category | |
638 | (allout-widgets-copy-list (symbol-plist | |
639 | 'allout-guides-span-category))) | |
640 | (put 'allout-icon-span-category 'field 'structure) | |
641 | ||
642 | ;; XXX for body text we're instead going to use the buffer-wide | |
643 | ;; resources, like before/after-change-functions hooks and the | |
644 | ;; buffer's key map. that way we won't have to do painful provisions | |
645 | ;; to fixup things after edits, catch outlier interstitial | |
646 | ;; characters, like newline and empty lines after hidden subitems, | |
647 | ;; etc. | |
648 | (setplist 'allout-body-span-category nil) | |
649 | (put 'allout-body-span-category 'evaporate t) | |
650 | (put 'allout-body-span-category 'local-map allout-item-body-keymap) | |
651 | ;;(put 'allout-body-span-category | |
652 | ;; 'modification-hooks '(allout-body-modification-handler)) | |
653 | ;;(put 'allout-body-span-category 'field 'body) | |
654 | ||
655 | (setplist 'allout-cue-span-category nil) | |
656 | (put 'allout-cue-span-category 'evaporate t) | |
657 | (put 'allout-cue-span-category | |
658 | 'modification-hooks '(allout-body-modification-handler)) | |
659 | (put 'allout-cue-span-category 'local-map allout-cue-span-keymap) | |
660 | (put 'allout-cue-span-category 'mouse-face widget-button-face) | |
661 | (put 'allout-cue-span-category 'pointer 'arrow) | |
662 | (put 'allout-cue-span-category 'field 'structure) | |
663 | ||
664 | (setplist 'allout-trailing-category nil) | |
665 | (put 'allout-trailing-category 'evaporate t) | |
666 | (put 'allout-trailing-category 'local-map allout-item-body-keymap) | |
667 | ||
668 | (setplist 'allout-escapes-category nil) | |
669 | (put 'allout-escapes-category 'invisible 'allout-escapes) | |
670 | (put 'allout-escapes-category 'evaporate t)) | |
671 | ;;;_ > allout-widgets-prepopulate-buffer () | |
672 | (defun allout-widgets-prepopulate-buffer () | |
673 | "Step over the current buffers exposed items to do initial widgetizing." | |
674 | (if (not allout-widgets-mode-inhibit) | |
675 | (save-excursion | |
676 | (goto-char (point-min)) | |
677 | (while (allout-next-visible-heading 1) | |
678 | (when (not (widget-at (point))) | |
679 | (allout-get-or-create-item-widget)))))) | |
680 | ;;;_ . settings context | |
681 | ;;;_ = allout-container-item | |
682 | (defvar allout-container-item-widget nil | |
683 | "A widget for the current outline's overarching container as an item. | |
684 | ||
685 | The item has settings \(of the file/connection\) and maybe a body, but no | |
686 | icon/bullet.") | |
687 | (make-variable-buffer-local 'allout-container-item-widget) | |
688 | ;;;_ . Hooks and hook helpers | |
689 | ;;;_ , major command-loop business: | |
690 | ;;;_ > allout-widgets-pre-command-business (&optional recursing) | |
691 | (defun allout-widgets-pre-command-business (&optional recursing) | |
692 | "Handle actions pending before allout-mode activity." | |
693 | ) | |
694 | ;;;_ > allout-widgets-post-command-business (&optional recursing) | |
695 | (defun allout-widgets-post-command-business (&optional recursing) | |
696 | "Handle actions pending after any allout-mode commands. | |
697 | ||
698 | Optional RECURSING is for internal use, to limit recursion." | |
699 | ;; - check changed text for nesting discontinuities and escape anything | |
700 | ;; that's: (1) asterisks at bol or (2) excessively nested. | |
701 | (condition-case failure | |
702 | ||
703 | (when (and (boundp 'allout-mode) allout-mode) | |
704 | ||
705 | (if allout-widgets-unset-inhibit-read-only | |
706 | (setq inhibit-read-only nil | |
707 | allout-widgets-unset-inhibit-read-only nil)) | |
708 | ||
709 | (when allout-widgets-reenable-before-change-handler | |
710 | (add-hook 'before-change-functions | |
711 | 'allout-widgets-before-change-handler | |
712 | nil 'local) | |
713 | (setq allout-widgets-reenable-before-change-handler nil)) | |
714 | ||
715 | (when (or allout-widgets-undo-exposure-record | |
716 | allout-widgets-changes-record) | |
717 | (let* ((debug-on-signal t) | |
718 | (debug-on-error t) | |
719 | ;; inhibit recording new undo records when processing | |
720 | ;; effects of undo-exposure: | |
721 | (debugger 'allout-widgets-hook-error-handler) | |
722 | (adjusting-message " Adjusting widgets...") | |
723 | (replaced-message (allout-widgets-adjusting-message | |
724 | adjusting-message)) | |
725 | (start-time (current-time))) | |
726 | ||
727 | (if allout-widgets-undo-exposure-record | |
728 | ;; inhibit undo recording iff undoing exposure stuff. | |
729 | ;; XXX we might need to inhibit per respective | |
730 | ;; change-record, rather than assuming that some undo | |
731 | ;; activity during a command is all undo activity. | |
732 | (let ((buffer-undo-list t)) | |
733 | (allout-widgets-exposure-undo-processor) | |
734 | (allout-widgets-changes-dispatcher)) | |
735 | (allout-widgets-exposure-undo-processor) | |
736 | (allout-widgets-changes-dispatcher)) | |
737 | ||
738 | (if allout-widgets-time-decoration-activity | |
739 | (setq allout-widgets-last-decoration-timing | |
740 | (list (allout-elapsed-time-seconds (current-time) | |
741 | start-time) | |
742 | allout-widgets-changes-record))) | |
743 | ||
744 | (setq allout-widgets-changes-record nil) | |
745 | ||
746 | (if replaced-message | |
747 | (if (stringp replaced-message) | |
748 | (message replaced-message) | |
749 | (message ""))))) | |
750 | ||
751 | ;; Detect undecorated items, eg during isearch into previously | |
752 | ;; unexposed topics, and decorate "economically". Some | |
753 | ;; undecorated stuff is often exposed, to reduce lag, but the | |
754 | ;; item containing the cursor is decorated. We constrain | |
755 | ;; recursion to avoid being trapped by unexpectedly undecoratable | |
756 | ;; items. | |
757 | (when (and (not recursing) | |
758 | (not (allout-current-decorated-p)) | |
759 | (or (not (equal (allout-depth) 0)) | |
760 | (not allout-container-item-widget))) | |
761 | (let ((buffer-undo-list t)) | |
762 | (allout-widgets-exposure-change-recorder | |
763 | allout-recent-prefix-beginning allout-recent-prefix-end nil) | |
764 | (allout-widgets-post-command-business 'recursing))) | |
765 | ||
766 | ;; Detect and rectify fouled outline structure - decorated item | |
767 | ;; not at beginning of line. | |
768 | (let ((this-widget (or (widget-at (point)) | |
769 | ;; XXX we really should be checking across | |
770 | ;; edited span, not just point and point+1 | |
771 | (and (not (eq (point) (point-max))) | |
772 | (widget-at (1+ (point)))))) | |
773 | inserted-at) | |
774 | (save-excursion | |
775 | (if (and this-widget | |
776 | (goto-char (widget-get this-widget :from)) | |
777 | (not (bolp))) | |
778 | (if (not | |
779 | (condition-case err | |
780 | (yes-or-no-p | |
781 | (concat "Misplaced item won't be recognizable " | |
782 | " as part of outline - rectify? ")) | |
783 | (quit nil))) | |
784 | (progn | |
785 | (if (allout-hidden-p (max (1- (point)) 1)) | |
786 | (save-excursion | |
787 | (goto-char (max (1- (point)) 1)) | |
788 | (allout-show-to-offshoot))) | |
789 | (allout-widgets-undecorate-item this-widget)) | |
790 | ;; expose any hidden intervening items, so resulting | |
791 | ;; position is clear: | |
792 | (setq inserted-at (point)) | |
793 | (allout-unprotected (insert-before-markers "\n")) | |
794 | (forward-char -1) | |
795 | ;; ensure the inserted newline is visible: | |
796 | (allout-flag-region inserted-at (1+ inserted-at) nil) | |
797 | (allout-widgets-post-command-business 'recursing) | |
798 | (message (concat "outline structure corrected - item" | |
799 | " moved to beginning of new line")) | |
800 | ;; preserve cursor position in some cases: | |
801 | (if (and inserted-at | |
802 | (> (point) inserted-at)) | |
803 | (forward-char -1))))))) | |
804 | ||
805 | (error | |
806 | ;; zero work list so we don't get stuck futily retrying. | |
807 | ;; error recording done by allout-widgets-hook-error-handler. | |
808 | (setq allout-widgets-changes-record nil)))) | |
809 | ;;;_ , major change handlers: | |
810 | ;;;_ > allout-widgets-before-change-handler | |
811 | (defun allout-widgets-before-change-handler (beg end) | |
812 | "Business to be done before changes in a widgetized allout outline." | |
813 | ;; protect against unruly edits to structure: | |
814 | (cond | |
815 | (undo-in-progress (when (eq (get-text-property beg 'category) | |
816 | 'allout-icon-span-category) | |
817 | (save-excursion | |
818 | (goto-char beg) | |
819 | (let* ((item-widget (allout-get-item-widget))) | |
820 | (if item-widget | |
821 | (allout-widgets-exposure-undo-recorder | |
822 | item-widget)))))) | |
823 | (inhibit-read-only t) | |
824 | ((not (and (boundp 'allout-mode) allout-mode)) t) | |
825 | ((equal this-command 'quoted-insert) t) | |
826 | ((not (text-property-any beg (if (equal end beg) | |
827 | (min (1+ beg) (point-max)) | |
828 | end) | |
829 | 'field 'structure)) | |
830 | t) | |
831 | ((yes-or-no-p "Unruly edit of outline structure - allow? ") | |
832 | (setq allout-widgets-unset-inhibit-read-only (not inhibit-read-only) | |
833 | inhibit-read-only t)) | |
834 | (t | |
835 | ;; tell the allout-widgets-post-command-business to reestablish the hook: | |
836 | (setq allout-widgets-reenable-before-change-handler t) | |
837 | ;; and raise an error to prevent the edit (and disable the hook): | |
838 | (error | |
839 | (substitute-command-keys allout-structure-unruly-deletion-message))))) | |
840 | ;;;_ > allout-widgets-after-change-handler | |
841 | (defun allout-widgets-after-change-handler (beg end prelength) | |
842 | "Reconcile what needs to be reconciled for allout widgets after edits." | |
843 | ) | |
844 | ;;;_ > allout-current-decorated-p () | |
845 | (defun allout-current-decorated-p () | |
846 | "True if the current item is not decorated" | |
847 | (save-excursion | |
848 | (if (allout-back-to-current-heading) | |
849 | (if (> allout-recent-depth 0) | |
850 | (and (allout-get-item-widget) t) | |
851 | allout-container-item-widget)))) | |
852 | ||
853 | ;;;_ > allout-widgets-hook-error-handler | |
854 | (defun allout-widgets-hook-error-handler (mode args) | |
855 | "Process errors which occurred in the course of command hook operation. | |
856 | ||
857 | We store a backtrace of the error information in the variable, | |
858 | `allout-widgets-last-hook-error', unset the error handlers, and | |
859 | reraise the error, so that processing continues to the | |
860 | encompassing condition-case." | |
861 | ;; first deconstruct special error environment so errors here propagate | |
862 | ;; to encompassing condition-case: | |
863 | (setq debugger 'debug | |
864 | debug-on-error nil | |
865 | debug-on-signal nil) | |
866 | (let* ((bt (with-output-to-string (backtrace))) | |
867 | (this "allout-widgets-hook-error-handler") | |
868 | (header | |
869 | (format "allout-widgets-last-hook-error stored, %s/%s %s %s" | |
870 | this mode args | |
871 | (format-time-string "%e-%b-%Y %r" (current-time))))) | |
872 | ;; post to *Messages* then immediately replace with more compact notice: | |
873 | (message "%s" (setq allout-widgets-last-hook-error | |
874 | (format "%s:\n%s" header bt))) | |
875 | (message header) (sit-for allout-widgets-hook-error-post-time) | |
876 | ;; reraise the error, or one concerning this function if unexpected: | |
877 | (if (equal mode 'error) | |
878 | (apply 'signal args) | |
879 | (error "%s: unexpected mode, %s %s" this mode args)))) | |
880 | ;;;_ > allout-widgets-changes-exceed-threshold-p () | |
881 | (defun allout-widgets-adjusting-message (message) | |
882 | "Post MESSAGE when pending are likely to make a big enough delay. | |
883 | ||
884 | If posting of the MESSAGE is warranted and there already is a | |
885 | `current-message' in the minibuffer, the MESSAGE is appended to | |
886 | the current one, and the previously pending `current-message' is | |
887 | returned for later posting on completion. | |
888 | ||
889 | If posting of the MESSAGE is warranted, but no `current-message' | |
890 | is pending, then t is returned to indicate that case. | |
891 | ||
892 | If posting of the MESSAGE is not warranted, then nil is returned. | |
893 | ||
894 | See `allout-widgets-adjust-message-length-threshold', | |
895 | `allout-widgets-adjust-message-size-threshold' for message | |
896 | posting threshold criteria." | |
897 | (if (or (> (length allout-widgets-changes-record) | |
898 | allout-widgets-adjust-message-length-threshold) | |
899 | ;; for size, use distance from start of first to end of last: | |
900 | (let ((min (point-max)) | |
901 | (max 0) | |
902 | first second) | |
903 | (mapc (function (lambda (entry) | |
904 | (if (eq :undone-exposure (car entry)) | |
905 | nil | |
906 | (setq first (cadr entry) | |
907 | second (caddr entry)) | |
908 | (if (< (min first second) min) | |
909 | (setq min (min first second))) | |
910 | (if (> (max first second) max) | |
911 | (setq max (max first second)))))) | |
912 | allout-widgets-changes-record) | |
913 | (> (- max min) allout-widgets-adjust-message-size-threshold))) | |
914 | (let ((prior (current-message))) | |
915 | (message (if prior (concat prior " - " message) message)) | |
916 | (or prior t)))) | |
917 | ;;;_ > allout-widgets-changes-dispatcher () | |
918 | (defun allout-widgets-changes-dispatcher () | |
919 | "Dispatch CHANGES-RECORD items to respective widgets change processors." | |
920 | ||
921 | (if (not allout-widgets-mode-inhibit) | |
922 | (let* ((changes-record allout-widgets-changes-record) | |
923 | (changes-pending (and changes-record t)) | |
924 | entry | |
925 | exposures | |
926 | additions | |
927 | deletions | |
928 | shifts) | |
929 | ||
930 | (when changes-pending | |
931 | (while changes-record | |
932 | (setq entry (pop changes-record)) | |
933 | (case (car entry) | |
934 | (:exposed (push entry exposures)) | |
935 | (:added (push entry additions)) | |
936 | (:deleted (push entry deletions)) | |
937 | (:shifted (push entry shifts)))) | |
938 | ||
939 | (if exposures | |
940 | (allout-widgets-exposure-change-processor exposures)) | |
941 | (if additions | |
942 | (allout-widgets-additions-processor additions)) | |
943 | (if deletions | |
944 | (allout-widgets-deletions-processor deletions)) | |
945 | (if shifts | |
946 | (allout-widgets-shifts-processor shifts)))) | |
947 | (when (not (equal allout-widgets-mode-inhibit 'undecorated)) | |
948 | (allout-widgets-undecorate-region (point-min)(point-max)) | |
949 | (setq allout-widgets-mode-inhibit 'undecorated)))) | |
950 | ;;;_ > allout-widgets-exposure-change-recorder (from to flag) | |
951 | (defun allout-widgets-exposure-change-recorder (from to flag) | |
952 | "Record allout exposure changes for tracking during post-command processing. | |
953 | ||
954 | Records changes in `allout-widgets-changes-record'." | |
955 | (push (list :exposed from to flag) allout-widgets-changes-record)) | |
956 | ;;;_ > allout-widgets-exposure-change-processor (changes) | |
957 | (defun allout-widgets-exposure-change-processor (changes) | |
958 | "Widgetize and adjust item widgets tracking allout outline exposure changes. | |
959 | ||
960 | Generally invoked via `allout-exposure-change-hook'." | |
961 | ||
962 | (let ((changes (sort changes (function (lambda (this next) | |
963 | (< (cadr this) (cadr next)))))) | |
964 | ;; have to distinguish between concealing and exposing so that, eg, | |
965 | ;; `allout-expose-topic's mix is handled properly. | |
966 | handled-expose | |
967 | handled-conceal | |
968 | covered | |
969 | deactivate-mark) | |
970 | ||
971 | (dolist (change changes) | |
972 | (let (handling | |
973 | (from (cadr change)) | |
974 | bucket got | |
975 | (to (caddr change)) | |
976 | (flag (cadddr change)) | |
977 | parent) | |
978 | ||
979 | ;; swap from and to: | |
980 | (if (< to from) (setq bucket to | |
981 | to from | |
982 | from bucket)) | |
983 | ||
984 | ;; have we already handled exposure changes in this region? | |
985 | (setq handling (if flag 'handled-conceal 'handled-expose) | |
986 | got (allout-range-overlaps from to (symbol-value handling)) | |
987 | covered (car got)) | |
988 | (set handling (cadr got)) | |
989 | ||
990 | (when (not covered) | |
991 | (save-excursion | |
992 | (goto-char from) | |
993 | (cond | |
994 | ||
995 | ;; collapsing: | |
996 | (flag | |
997 | (allout-widgets-undecorate-region from to) | |
998 | (allout-beginning-of-current-line) | |
999 | (let ((widget (allout-get-item-widget))) | |
1000 | (if (not widget) | |
1001 | (allout-get-or-create-item-widget) | |
1002 | (widget-apply widget :redecorate)))) | |
1003 | ||
1004 | ;; expanding: | |
1005 | (t | |
1006 | (while (< (point) to) | |
1007 | (allout-beginning-of-current-line) | |
1008 | (setq parent (allout-get-item-widget)) | |
1009 | (if (not parent) | |
1010 | (setq parent (allout-get-or-create-item-widget)) | |
1011 | (widget-apply parent :redecorate)) | |
1012 | (allout-next-visible-heading 1) | |
1013 | (if (widget-get parent :has-subitems) | |
1014 | (allout-redecorate-visible-subtree parent)) | |
1015 | (if (> (point) to) | |
1016 | ;; subtree may be well beyond to - incorporate in ranges: | |
1017 | (setq handled-expose | |
1018 | (allout-range-overlaps from (point) handled-expose) | |
1019 | covered (car handled-expose) | |
1020 | handled-expose (cadr handled-expose))) | |
1021 | (allout-next-visible-heading 1)))))))))) | |
1022 | ||
1023 | ;;;_ > allout-widgets-additions-recorder (from to) | |
1024 | (defun allout-widgets-additions-recorder (from to) | |
1025 | "Record allout item additions for tracking during post-command processing. | |
1026 | ||
1027 | Intended for use on `allout-structure-added-hook'. | |
1028 | ||
1029 | FROM point at the start of the first new item and TO is point at the start | |
1030 | of the last one. | |
1031 | ||
1032 | Records changes in `allout-widgets-changes-record'." | |
1033 | (push (list :added from to) allout-widgets-changes-record)) | |
1034 | ;;;_ > allout-widgets-additions-processor (changes) | |
1035 | (defun allout-widgets-additions-processor (changes) | |
1036 | "Widgetize and adjust items tracking allout outline structure additions. | |
1037 | ||
1038 | Dispatched by `allout-widgets-post-command-business' in response to | |
1039 | :added entries recorded by `allout-widgets-additions-recorder'." | |
1040 | (save-excursion | |
1041 | (let (handled | |
1042 | covered) | |
1043 | (dolist (change changes) | |
1044 | (let ((from (cadr change)) | |
1045 | bucket | |
1046 | (to (caddr change))) | |
1047 | (if (< to from) (setq bucket to to from from bucket)) | |
1048 | ;; have we already handled exposure changes in this region? | |
1049 | (setq handled (allout-range-overlaps from to handled) | |
1050 | covered (car handled) | |
1051 | handled (cadr handled)) | |
1052 | (when (not covered) | |
1053 | (goto-char from) | |
1054 | ;; Prior sibling and parent can both be affected. | |
1055 | (if (allout-ascend) | |
1056 | (allout-redecorate-visible-subtree | |
1057 | (allout-get-or-create-item-widget 'redecorate))) | |
1058 | (if (< (point) from) | |
1059 | (goto-char from)) | |
1060 | (while (and (< (point) to) (not (eobp))) | |
1061 | (allout-beginning-of-current-line) | |
1062 | (allout-redecorate-visible-subtree | |
1063 | (allout-get-or-create-item-widget)) | |
1064 | (allout-next-visible-heading 1)) | |
1065 | (if (> (point) to) | |
1066 | ;; subtree may be well beyond to - incorporate in ranges: | |
1067 | (setq handled (allout-range-overlaps from (point) handled) | |
1068 | covered (car handled) | |
1069 | handled (cadr handled))))))))) | |
1070 | ||
1071 | ;;;_ > allout-widgets-deletions-recorder (depth from) | |
1072 | (defun allout-widgets-deletions-recorder (depth from) | |
1073 | "Record allout item deletions for tracking during post-command processing. | |
1074 | ||
1075 | Intended for use on `allout-structure-deleted-hook'. | |
1076 | ||
1077 | DEPTH is the depth of the deleted subtree, and FROM is the point from which | |
1078 | the subtree was deleted. | |
1079 | ||
1080 | Records changes in `allout-widgets-changes-record'." | |
1081 | (push (list :deleted depth from) allout-widgets-changes-record)) | |
1082 | ;;;_ > allout-widgets-deletions-processor (changes) | |
1083 | (defun allout-widgets-deletions-processor (changes) | |
1084 | "Adjust items tracking allout outline structure deletions. | |
1085 | ||
1086 | Dispatched by `allout-widgets-post-command-business' in response to | |
1087 | :deleted entries recorded by `allout-widgets-deletions-recorder'." | |
1088 | (save-excursion | |
1089 | (dolist (change changes) | |
1090 | (let ((depth (cadr change)) | |
1091 | (from (caddr change))) | |
1092 | (goto-char from) | |
1093 | (when (allout-previous-visible-heading 1) | |
1094 | (if (> depth 1) | |
1095 | (allout-ascend-to-depth (1- depth))) | |
1096 | (allout-redecorate-visible-subtree | |
1097 | (allout-get-or-create-item-widget 'redecorate))))))) | |
1098 | ||
1099 | ;;;_ > allout-widgets-shifts-recorder (shifted-amount at) | |
1100 | (defun allout-widgets-shifts-recorder (shifted-amount at) | |
1101 | "Record outline subtree shifts for tracking during post-command processing. | |
1102 | ||
1103 | Intended for use on `allout-structure-shifted-hook'. | |
1104 | ||
1105 | SHIFTED-AMOUNT is the depth change and AT is the point at the start of the | |
1106 | subtree that's been shifted. | |
1107 | ||
1108 | Records changes in `allout-widgets-changes-record'." | |
1109 | (push (list :shifted shifted-amount at) allout-widgets-changes-record)) | |
1110 | ;;;_ > allout-widgets-shifts-processor (changes) | |
1111 | (defun allout-widgets-shifts-processor (changes) | |
1112 | "Widgetize and adjust items tracking allout outline structure additions. | |
1113 | ||
1114 | Dispatched by `allout-widgets-post-command-business' in response to | |
1115 | :shifted entries recorded by `allout-widgets-shifts-recorder'." | |
1116 | (save-excursion | |
1117 | (dolist (change changes) | |
1118 | (goto-char (caddr change)) | |
1119 | (allout-ascend) | |
1120 | (allout-redecorate-visible-subtree)))) | |
1121 | ;;;_ > allout-widgets-after-copy-or-kill-function () | |
1122 | (defun allout-widgets-after-copy-or-kill-function () | |
1123 | "Do allout-widgets processing of text just placed in the kill ring. | |
1124 | ||
1125 | Intended for use on allout-after-copy-or-kill-hook." | |
1126 | (if (car kill-ring) | |
1127 | (setcar kill-ring (allout-widgets-undecorate-text (car kill-ring))))) | |
1128 | ||
1129 | ;;;_ > allout-widgets-exposure-undo-recorder (widget from-state) | |
1130 | (defun allout-widgets-exposure-undo-recorder (widget) | |
1131 | "Record outline exposure undo for tracking during post-command processing. | |
1132 | ||
1133 | Intended for use by `allout-graphics-modification-handler'. | |
1134 | ||
1135 | WIDGET is the widget being changed. | |
1136 | ||
1137 | Records changes in `allout-widgets-changes-record'." | |
1138 | ;; disregard the events if we're currently processing them. | |
1139 | (if (not allout-undo-exposure-in-progress) | |
1140 | (push widget allout-widgets-undo-exposure-record))) | |
1141 | ;;;_ > allout-widgets-exposure-undo-processor () | |
1142 | (defun allout-widgets-exposure-undo-processor () | |
1143 | "Adjust items tracking undo of allout outline structure exposure. | |
1144 | ||
1145 | Dispatched by `allout-widgets-post-command-business' in response to | |
1146 | :undone-exposure entries recorded by `allout-widgets-exposure-undo-recorder'." | |
1147 | (let* ((allout-undo-exposure-in-progress t) | |
1148 | ;; inhibit undo recording while twiddling exposure to track undo: | |
1149 | (widgets allout-widgets-undo-exposure-record) | |
1150 | widget widget-start-marker widget-end-marker | |
1151 | from-state icon-start-point to-state | |
1152 | handled covered) | |
1153 | (setq allout-widgets-undo-exposure-record nil) | |
1154 | (save-excursion | |
1155 | (dolist (widget widgets) | |
1156 | (setq widget-start-marker (widget-get widget :from) | |
1157 | widget-end-marker (widget-get widget :to) | |
1158 | from-state (widget-get widget :icon-state) | |
1159 | icon-start-point (widget-apply widget :actual-position | |
1160 | :icon-start) | |
1161 | to-state (get-text-property icon-start-point | |
1162 | :icon-state)) | |
1163 | (setq handled (allout-range-overlaps widget-start-marker | |
1164 | widget-end-marker | |
1165 | handled) | |
1166 | covered (car handled) | |
1167 | handled (cadr handled)) | |
1168 | (when (not covered) | |
1169 | (goto-char (widget-get widget :from)) | |
1170 | (when (not (allout-hidden-p)) | |
1171 | ;; adjust actual exposure to that of to-state viz from-state | |
1172 | (cond ((and (eq to-state 'closed) (eq from-state 'opened)) | |
1173 | (allout-hide-current-subtree) | |
1174 | (allout-decorate-item-and-context widget)) | |
1175 | ((and (eq to-state 'opened) (eq from-state 'closed)) | |
1176 | (save-excursion | |
1177 | (dolist | |
1178 | (expose-to (allout-chart-exposure-contour-by-icon)) | |
1179 | (goto-char expose-to) | |
1180 | (allout-show-to-offshoot))))))))))) | |
1181 | ;;;_ > allout-chart-exposure-contour-by-icon (&optional from-depth) | |
1182 | (defun allout-chart-exposure-contour-by-icon (&optional from-depth) | |
1183 | "Return points of subtree items to which exposure should be extended. | |
1184 | ||
1185 | The qualifying items are ones with a widget icon that is in the closed or | |
1186 | empty state, or items with undecorated subitems. | |
1187 | ||
1188 | The resulting list of points is in reverse order. | |
1189 | ||
1190 | Optional FROM-DEPTH is for internal use." | |
1191 | ;; During internal recursion, we return a pair: (at-end . result) | |
1192 | ;; Otherwise we just return the result. | |
1193 | (let ((from-depth from-depth) | |
1194 | start-point | |
1195 | at-end level-depth | |
1196 | this-widget | |
1197 | got subgot) | |
1198 | (if from-depth | |
1199 | (setq level-depth (allout-depth)) | |
1200 | ;; at containing item: | |
1201 | (setq start-point (point)) | |
1202 | (setq from-depth (allout-depth)) | |
1203 | (setq at-end (not (allout-next-heading)) | |
1204 | level-depth allout-recent-depth)) | |
1205 | ||
1206 | ;; traverse the level, recursing on deeper levels: | |
1207 | (while (and (not at-end) | |
1208 | (> allout-recent-depth from-depth) | |
1209 | (setq this-widget (allout-get-item-widget))) | |
1210 | (if (< level-depth allout-recent-depth) | |
1211 | ;; recurse: | |
1212 | (progn | |
1213 | (setq subgot (allout-chart-exposure-contour-by-icon level-depth) | |
1214 | at-end (car subgot) | |
1215 | subgot (cdr subgot)) | |
1216 | (if subgot (setq got (append subgot got)))) | |
1217 | ;; progress at this level: | |
1218 | (when (memq (widget-get this-widget :icon-state) '(closed empty)) | |
1219 | (push (point) got) | |
1220 | (allout-end-of-subtree)) | |
1221 | (setq at-end (not (allout-next-heading))))) | |
1222 | ||
1223 | ;; tailor result depending on whether or not we're a recursion: | |
1224 | (if (not start-point) | |
1225 | (cons at-end got) | |
1226 | (goto-char start-point) | |
1227 | got))) | |
1228 | ;;;_ > allout-range-overlaps (from to ranges) | |
1229 | (defun allout-range-overlaps (from to ranges) | |
1230 | "Return a pair indicating overlap of FROM and TO subtree range in RANGES. | |
1231 | ||
1232 | First element of result indicates whether candadate range FROM, TO | |
1233 | overlapped any of the existing ranges. | |
1234 | ||
1235 | Second element of result is a new version of RANGES incorporating the | |
1236 | candidate range with overlaps consolidated. | |
1237 | ||
1238 | FROM and TO must be in increasing order, as must be the pairs in RANGES." | |
1239 | ;; to append to the end: (rplacd next-to-last-cdr (list 'f)) | |
1240 | (let (new-ranges | |
1241 | entry | |
1242 | ;; the start of the range that includes the candidate from: | |
1243 | included-from | |
1244 | ;; the end of the range that includes the candidate to: | |
1245 | included-to | |
1246 | ;; the candidates were inserted: | |
1247 | done) | |
1248 | (while (and ranges (not done)) | |
1249 | (setq entry (car ranges) | |
1250 | ranges (cdr ranges)) | |
1251 | ||
1252 | (cond | |
1253 | ||
1254 | (included-from | |
1255 | ;; some entry included the candidate from. | |
1256 | (cond ((> (car entry) to) | |
1257 | ;; current entry exceeds end of candidate range - done. | |
1258 | (push (list included-from to) new-ranges) | |
1259 | (push entry new-ranges) | |
1260 | (setq included-to to | |
1261 | done t)) | |
1262 | ((>= (cadr entry) to) | |
1263 | ;; current entry includes end of candidate range - done. | |
1264 | (push (list included-from (cadr entry)) new-ranges) | |
1265 | (setq included-to (cadr entry) | |
1266 | done t)) | |
1267 | ;; current entry contained in candidate range - ditch, continue: | |
1268 | (t nil))) | |
1269 | ||
1270 | ((> (car entry) to) | |
1271 | ;; current entry start exceeds candidate end - done, placed as new entry | |
1272 | (push (list from to) new-ranges) | |
1273 | (push entry new-ranges) | |
1274 | (setq included-to to | |
1275 | done t)) | |
1276 | ||
1277 | ((>= (car entry) from) | |
1278 | ;; current entry start is above candidate start, but not above | |
1279 | ;; candidate end (by prior case). | |
1280 | (setq included-from from) | |
1281 | ;; now we have to check on whether this entry contains to, or continue: | |
1282 | (when (>= (cadr entry) to) | |
1283 | ;; current entry contains only candidate end - done: | |
1284 | (push (list included-from (cadr entry)) new-ranges) | |
1285 | (setq included-to (cadr entry) | |
1286 | done t)) | |
1287 | ;; otherwise, we will continue to look for placement of candidate end. | |
1288 | ) | |
1289 | ||
1290 | ((>= (cadr entry) to) | |
1291 | ;; current entry properly contains candidate range. | |
1292 | (push entry new-ranges) | |
1293 | (setq included-from (car entry) | |
1294 | included-to (cadr entry) | |
1295 | done t)) | |
1296 | ||
1297 | ((>= (cadr entry) from) | |
1298 | ;; current entry contains start of candidate range. | |
1299 | (setq included-from (car entry))) | |
1300 | ||
1301 | (t | |
1302 | ;; current entry is below the candidate range. | |
1303 | (push entry new-ranges)))) | |
1304 | ||
1305 | (cond ((and included-from included-to) | |
1306 | ;; candidates placed. | |
1307 | nil) | |
1308 | ((not (or included-from included-to)) | |
1309 | ;; candidates found no place, must be at the end: | |
1310 | (push (list from to) new-ranges)) | |
1311 | (included-from | |
1312 | ;; candidate start placed but end not: | |
1313 | (push (list included-from to) new-ranges)) | |
1314 | ;; might be included-to and not included-from, indicating new entry. | |
1315 | ) | |
1316 | (setq new-ranges (nreverse new-ranges)) | |
1317 | (if ranges (setq new-ranges (append new-ranges ranges))) | |
1318 | (list (if included-from t) new-ranges))) | |
1319 | ;;;_ > allout-test-range-overlaps () | |
1320 | (defun allout-test-range-overlaps () | |
1321 | "allout-range-overlaps unit tests." | |
1322 | (let* (ranges | |
1323 | got | |
1324 | (try (lambda (from to) | |
1325 | (setq got (allout-range-overlaps from to ranges)) | |
1326 | (setq ranges (cadr got)) | |
1327 | got))) | |
1328 | ;; ;; biggie: | |
1329 | ;; (setq ranges nil) | |
1330 | ;; ;; ~ .02 to .1 seconds for just repeated listing args instead of funcall | |
1331 | ;; ;; ~ 13 seconds for doing repeated funcall | |
1332 | ;; (message "time-trial: %s, resulting size %s" | |
1333 | ;; (time-trial | |
1334 | ;; '(let ((size 10000) | |
1335 | ;; doing) | |
1336 | ;; (random t) | |
1337 | ;; (dotimes (count size) | |
1338 | ;; (setq doing (random size)) | |
1339 | ;; (funcall try doing (+ doing (random 5))) | |
1340 | ;; ;;(list doing (+ doing (random 5))) | |
1341 | ;; ))) | |
1342 | ;; (length ranges)) | |
1343 | ;; (sit-for 2) | |
1344 | ||
1345 | ;; fresh: | |
1346 | (setq ranges nil) | |
1347 | (assert (equal (funcall try 3 5) '(nil ((3 5))))) | |
1348 | ;; add range at end: | |
1349 | (assert (equal (funcall try 10 12) '(nil ((3 5) (10 12))))) | |
1350 | ;; add range at beginning: | |
1351 | (assert (equal (funcall try 1 2) '(nil ((1 2) (3 5) (10 12))))) | |
1352 | ;; insert range somewhere in the middle: | |
1353 | (assert (equal (funcall try 7 9) '(nil ((1 2) (3 5) (7 9) (10 12))))) | |
1354 | ;; consolidate some: | |
1355 | (assert (equal (funcall try 5 8) '(t ((1 2) (3 9) (10 12))))) | |
1356 | ;; add more: | |
1357 | (assert (equal (funcall try 15 17) '(nil ((1 2) (3 9) (10 12) (15 17))))) | |
1358 | ;; add more: | |
1359 | (assert (equal (funcall try 20 22) | |
1360 | '(nil ((1 2) (3 9) (10 12) (15 17) (20 22))))) | |
1361 | ;; encompass more: | |
1362 | (assert (equal (funcall try 4 11) '(t ((1 2) (3 12) (15 17) (20 22))))) | |
1363 | ;; encompass all: | |
1364 | (assert (equal (funcall try 2 25) '(t ((1 25))))) | |
1365 | ||
1366 | ;; fresh slate: | |
1367 | (setq ranges nil) | |
1368 | (assert (equal (funcall try 20 25) '(nil ((20 25))))) | |
1369 | (assert (equal (funcall try 30 35) '(nil ((20 25) (30 35))))) | |
1370 | (assert (equal (funcall try 26 28) '(nil ((20 25) (26 28) (30 35))))) | |
1371 | (assert (equal (funcall try 15 20) '(t ((15 25) (26 28) (30 35))))) | |
1372 | (assert (equal (funcall try 10 30) '(t ((10 35))))) | |
1373 | (assert (equal (funcall try 5 6) '(nil ((5 6) (10 35))))) | |
1374 | (assert (equal (funcall try 2 100) '(t ((2 100))))) | |
1375 | ||
1376 | (setq ranges nil) | |
1377 | )) | |
1378 | ;;;_ > allout-widgetize-buffer (&optional doing) | |
1379 | (defun allout-widgetize-buffer (&optional doing) | |
1380 | "EXAMPLE FUNCTION. Widgetize items in buffer using allout-chart-subtree. | |
1381 | ||
1382 | We economize by just focusing on the first of local-maximum depth siblings. | |
1383 | ||
1384 | Optional DOING is for internal use - a chart of the current level, for | |
1385 | recursive operation." | |
1386 | ||
1387 | (interactive) | |
1388 | (if (not doing) | |
1389 | ||
1390 | (save-excursion | |
1391 | (goto-char (point-min)) | |
1392 | ;; Construct the chart by scanning the siblings: | |
1393 | (dolist (top-level-sibling (allout-chart-siblings)) | |
1394 | (goto-char top-level-sibling) | |
1395 | (let ((subchart (allout-chart-subtree))) | |
1396 | (if subchart | |
1397 | (allout-widgetize-buffer subchart))))) | |
1398 | ||
1399 | ;; save-excursion was done on recursion entry, not necessary here. | |
1400 | (let (have-sublists) | |
1401 | (dolist (sibling doing) | |
1402 | (when (listp sibling) | |
1403 | (setq have-sublists t) | |
1404 | (allout-widgetize-buffer sibling))) | |
1405 | (when (and (not have-sublists) (not (widget-at (car doing)))) | |
1406 | (goto-char (car doing)) | |
1407 | (allout-get-or-create-item-widget))))) | |
1408 | ||
1409 | ;;;_ : Item widget and constructors | |
1410 | ||
1411 | ;;;_ $ allout-item-widget | |
1412 | (define-widget 'allout-item-widget 'default | |
1413 | "A widget presenting an allout outline item." | |
1414 | ||
1415 | 'button nil | |
1416 | ;; widget-field-at respects this to get item if 'field is unused. | |
1417 | ;; we don't use field to avoid collision with end-of-line, etc, on which | |
1418 | ;; allout depends. | |
1419 | 'real-field nil | |
1420 | ||
1421 | ;; data fields: | |
1422 | ||
1423 | ||
1424 | ;; tailor the widget for a specific item | |
1425 | :create 'allout-decorate-item-and-context | |
1426 | :value-delete 'allout-widgets-undecorate-item | |
1427 | ;; Not Yet Converted (from original, tree-widget stab) | |
1428 | :expander 'allout-tree-event-dispatcher ; get children when nil :args | |
1429 | :expander-p 'identity ; always engage the :expander | |
1430 | :action 'allout-tree-widget-action | |
1431 | ;; :notify "when item changes" | |
1432 | ||
1433 | ;; force decoration of item but not context, unless already done this tick: | |
1434 | :redecorate 'allout-redecorate-item | |
1435 | :last-decorated-tick nil | |
1436 | ;; recognize the actual situation of the item's text: | |
1437 | :parse-item 'allout-parse-item-at-point | |
1438 | ;; decorate the entirety of the item, sans offspring: | |
1439 | :decorate-item-span 'allout-decorate-item-span | |
1440 | ;; decorate the various item elements: | |
1441 | :decorate-guides 'allout-decorate-item-guides | |
1442 | :decorate-icon 'allout-decorate-item-icon | |
1443 | :decorate-cue 'allout-decorate-item-cue | |
1444 | :decorate-body 'allout-decorate-item-body | |
1445 | :actual-position 'allout-item-actual-position | |
1446 | ||
1447 | ;; Layout parameters: | |
1448 | :is-container nil ; is this actually the encompassing file/connection? | |
1449 | ||
1450 | :from nil ; item beginning - marker | |
1451 | :to nil ; item end - marker | |
1452 | :span-overlay nil ; overlay by which actual postion is determined | |
1453 | ||
1454 | ;; also serves as guide-end: | |
1455 | :icon-start nil | |
1456 | :icon-end nil | |
1457 | :distinctive-start nil | |
1458 | ;; also serves as cue-start: | |
1459 | :distinctive-end nil | |
1460 | ;; also serves as cue-end: | |
1461 | :body-start nil | |
1462 | :body-end nil | |
1463 | :depth nil | |
1464 | :has-subitems nil | |
1465 | :was-has-subitems 'init | |
1466 | :expanded nil | |
1467 | :was-expanded 'init | |
1468 | :brief nil | |
1469 | :was-brief 'init | |
1470 | ||
1471 | :does-encrypt nil ; pending encryption when :is-encrypted false. | |
1472 | :is-encrypted nil | |
1473 | ||
1474 | ;; the actual location of the item text: | |
1475 | :location 'allout-item-location | |
1476 | ||
1477 | :button-keymap allout-item-icon-keymap ; XEmacs | |
1478 | :keymap allout-item-icon-keymap ; Emacs | |
1479 | ||
1480 | ;; Element regions: | |
1481 | :guides-span nil | |
1482 | :icon-span nil | |
1483 | :cue-span nil | |
1484 | :bullet nil | |
1485 | :was-bullet nil | |
1486 | :body-span nil | |
1487 | ||
1488 | :body-brevity-p 'allout-body-brevity-p | |
1489 | ||
1490 | ;; :guide-column-flags indicate (in reverse order) whether or not the | |
1491 | ;; item's ancestor at the depth corresponding to the column has a | |
1492 | ;; subsequent sibling - ie, whether or not the corresponding column needs | |
1493 | ;; a descender line to connect that ancestor with its sibling. | |
1494 | :guide-column-flags nil | |
1495 | :was-guide-column-flags 'init | |
1496 | ||
1497 | ;; ie, has subitems: | |
1498 | :populous-p 'allout-item-populous-p | |
1499 | :help-echo 'allout-tree-widget-help-echo | |
1500 | ) | |
1501 | ;;;_ > allout-new-item-widget () | |
1502 | (defsubst allout-new-item-widget () | |
1503 | "create a new item widget, not yet situated anywhere." | |
1504 | (if allout-widgets-maintain-tally | |
1505 | ;; all the extra overhead is incurred only when doing the | |
1506 | ;; maintenance, except the condition, which can't be avoided. | |
1507 | (let ((widget (widget-convert 'allout-item-widget))) | |
1508 | (puthash widget nil allout-widgets-tally) | |
1509 | widget) | |
1510 | (widget-convert 'allout-item-widget))) | |
1511 | ;;;_ : Item decoration | |
1512 | ;;;_ > allout-decorate-item-and-context (item-widget &optional redecorate | |
1513 | ;;; blank-container parent) | |
1514 | (defun allout-decorate-item-and-context (item-widget &optional redecorate | |
1515 | blank-container parent) | |
1516 | "Create or adjust widget decorations for ITEM-WIDGET and neighbors at point. | |
1517 | ||
1518 | The neighbors include its siblings and parent. | |
1519 | ||
1520 | ITEM-WIDGET can be a created or converted allout-item-widget. | |
1521 | ||
1522 | If you're only trying to get or create a widget for an item, use | |
1523 | `allout-get-or-create-item-widget'. If you have the item-widget, applying | |
1524 | :redecorate will do the right thing. | |
1525 | ||
1526 | Optional BLANK-CONTAINER is for internal use. It is used to fabricate a | |
1527 | container widget for an empty-bodied container, in the course of decorating | |
1528 | a proper \(non-container\) item which starts at the beginning of the file. | |
1529 | ||
1530 | Optional REDECORATE causes redecoration of the item-widget and | |
1531 | its siblings, even if already decorated in this cycle of the command loop. | |
1532 | ||
1533 | Optional PARENT, when provided, bypasses some navigation and computation | |
1534 | necessary to obtain the parent of the items being processed. | |
1535 | ||
1536 | We return the item-widget corresponding to the item at point." | |
1537 | ||
1538 | (when (or redecorate | |
1539 | (not (equal (widget-get item-widget :last-decorated-tick) | |
1540 | allout-command-counter))) | |
1541 | (let* ((allout-inhibit-body-modification-hook t) | |
1542 | (was-modified (buffer-modified-p)) | |
1543 | (was-point (point)) | |
1544 | prefix-start | |
1545 | (is-container (or blank-container | |
1546 | (not (setq prefix-start (allout-goto-prefix))) | |
1547 | (< was-point prefix-start))) | |
1548 | ;; steady-point (set in two steps) is reliable across parent | |
1549 | ;; widget-creation. | |
1550 | (steady-point (progn (if is-container (goto-char 1)) | |
1551 | (point-marker))) | |
1552 | (steady-point (progn (set-marker-insertion-type steady-point t) | |
1553 | steady-point)) | |
1554 | (parent (and (not is-container) | |
1555 | (allout-get-or-create-parent-widget))) | |
1556 | parent-flags parent-depth | |
1557 | successor-sibling | |
1558 | body | |
1559 | doing-item | |
1560 | sub-item-widget | |
1561 | depth | |
1562 | reverse-siblings-chart | |
1563 | (buffer-undo-list t)) | |
1564 | ||
1565 | ;; At this point the parent is decorated and parent-flags indicate | |
1566 | ;; its guide lines. We will iterate over the siblings according to a | |
1567 | ;; chart we create at the start, and going from last to first so we | |
1568 | ;; don't have to worry about text displacement caused by widgetizing. | |
1569 | ||
1570 | (if is-container | |
1571 | (progn (widget-put item-widget :is-container t) | |
1572 | (setq reverse-siblings-chart (list 1))) | |
1573 | (goto-char (widget-apply parent :actual-position :from)) | |
1574 | (if (widget-get parent :is-container) | |
1575 | ;; `allout-goto-prefix' will go to first non-container item: | |
1576 | (allout-goto-prefix) | |
1577 | (allout-next-heading)) | |
1578 | (setq depth (allout-recent-depth)) | |
1579 | (setq reverse-siblings-chart (list allout-recent-prefix-beginning)) | |
1580 | (while (allout-next-sibling) | |
1581 | (push allout-recent-prefix-beginning reverse-siblings-chart))) | |
1582 | ||
1583 | (dolist (doing-at reverse-siblings-chart) | |
1584 | (goto-char doing-at) | |
1585 | (when allout-widgets-track-decoration | |
1586 | (sit-for 0)) | |
1587 | ||
1588 | (setq doing-item (if (= doing-at steady-point) | |
1589 | item-widget | |
1590 | (or (allout-get-item-widget) | |
1591 | (allout-new-item-widget)))) | |
1592 | ||
1593 | (when (or redecorate (not (equal (widget-get doing-item | |
1594 | :last-decorated-tick) | |
1595 | allout-command-counter))) | |
1596 | (widget-apply doing-item :parse-item t blank-container) | |
1597 | (widget-apply doing-item :decorate-item-span) | |
1598 | ||
1599 | (widget-apply doing-item :decorate-guides | |
1600 | parent (and successor-sibling t)) | |
1601 | (widget-apply doing-item :decorate-icon) | |
1602 | (widget-apply doing-item :decorate-cue) | |
1603 | (widget-apply doing-item :decorate-body) | |
1604 | ||
1605 | (widget-put doing-item :last-decorated-tick allout-command-counter)) | |
1606 | ||
1607 | (setq successor-sibling doing-at)) | |
1608 | ||
1609 | (set-buffer-modified-p was-modified) | |
1610 | (goto-char steady-point) | |
1611 | ;; must null the marker or the buffer gets clogged with impedence: | |
1612 | (set-marker steady-point nil) | |
1613 | ||
1614 | item-widget))) | |
1615 | ;;;_ > allout-redecorate-item (item) | |
1616 | (defun allout-redecorate-item (item-widget) | |
1617 | "Resituate ITEM-WIDGET decorations, disregarding context. | |
1618 | ||
1619 | Use this to redecorate only the item, when you know that it's | |
1620 | situation with respect to siblings, parent, and offspring is | |
1621 | unchanged from its last decoration. Use | |
1622 | `allout-decorate-item-and-context' instead to reassess and adjust | |
1623 | relevent context, when suitable." | |
1624 | (if (not (equal (widget-get item-widget :last-decorated-tick) | |
1625 | allout-command-counter)) | |
1626 | (let ((was-modified (buffer-modified-p)) | |
1627 | (buffer-undo-list t)) | |
1628 | (widget-apply item-widget :parse-item) | |
1629 | (widget-apply item-widget :decorate-guides) | |
1630 | (widget-apply item-widget :decorate-icon) | |
1631 | (widget-apply item-widget :decorate-cue) | |
1632 | (widget-apply item-widget :decorate-body) | |
1633 | (set-buffer-modified-p was-modified)))) | |
1634 | ;;;_ > allout-redecorate-visible-subtree (&optional parent-widget | |
1635 | ;;; depth chart) | |
1636 | (defun allout-redecorate-visible-subtree (&optional parent-widget depth chart) | |
1637 | "Redecorate all visible items in subtree at point. | |
1638 | ||
1639 | Optional PARENT-WIDGET is for optimization, when the parent | |
1640 | widget is already available. | |
1641 | ||
1642 | Optional DEPTH restricts the excursion depth of covered. | |
1643 | ||
1644 | Optional CHART is for internal recursion, to carry a chart of the | |
1645 | target items. | |
1646 | ||
1647 | Point is left at the last sibling in the visible subtree." | |
1648 | ;; using a treatment that takes care of all the siblings on a level, we | |
1649 | ;; only need apply it to the first sibling on the level, and we can | |
1650 | ;; collect and pass the parent of the lower levels to recursive calls as | |
1651 | ;; we go. | |
1652 | (let ((parent-widget | |
1653 | (if (and parent-widget (widget-apply parent-widget | |
1654 | :actual-position :from)) | |
1655 | (progn (goto-char (widget-apply parent-widget | |
1656 | :actual-position :from)) | |
1657 | parent-widget) | |
1658 | (let ((got (allout-get-item-widget))) | |
1659 | (if got | |
1660 | (allout-decorate-item-and-context got 'redecorate) | |
1661 | (allout-get-or-create-item-widget 'redecorate))))) | |
1662 | (pending-chart (or chart (allout-chart-subtree nil 'visible))) | |
1663 | item-widget | |
1664 | previous-sibling-point | |
1665 | previous-sibling | |
1666 | recent-sibling-point) | |
1667 | (setq pending-chart (nreverse pending-chart)) | |
1668 | (dolist (sibling-point pending-chart) | |
1669 | (cond ((integerp sibling-point) | |
1670 | (when (not previous-sibling-point) | |
1671 | (goto-char sibling-point) | |
1672 | (if (setq item-widget (allout-get-item-widget nil)) | |
1673 | (allout-decorate-item-and-context item-widget 'redecorate | |
1674 | nil parent-widget) | |
1675 | (allout-get-or-create-item-widget))) | |
1676 | (setq previous-sibling-point sibling-point | |
1677 | recent-sibling-point sibling-point)) | |
1678 | ((listp sibling-point) | |
1679 | (if (or (not depth) | |
1680 | (> depth 1)) | |
1681 | (allout-redecorate-visible-subtree | |
1682 | (if (not previous-sibling-point) | |
1683 | ;; containment discontinuity - sigh | |
1684 | parent-widget | |
1685 | (allout-get-or-create-item-widget 'redecorate)) | |
1686 | (if depth (1- depth)) | |
1687 | sibling-point))))) | |
1688 | (if (and recent-sibling-point (< (point) recent-sibling-point)) | |
1689 | (goto-char recent-sibling-point)))) | |
1690 | ;;;_ > allout-parse-item-at-point (item-widget &optional at-beginning | |
1691 | ;;; blank-container) | |
1692 | (defun allout-parse-item-at-point (item-widget &optional at-beginning | |
1693 | blank-container) | |
1694 | "Set widget ITEM-WIDGET layout parameters per item-at-point's actual layout. | |
1695 | ||
1696 | If optional AT-BEGINNING is t, then point is assumed to be at the start of | |
1697 | the item prefix. | |
1698 | ||
1699 | If optional BLANK-CONTAINER is true, then the parameters of a container | |
1700 | which has an empty body are set. \(Though the body is blank, the object | |
1701 | may have subitems.\)" | |
1702 | ||
1703 | ;; Uncomment this sit-for to notice where decoration is happening: | |
1704 | ;; (sit-for .1) | |
1705 | (let* ((depth (allout-depth)) | |
1706 | (depth (if blank-container 0 depth)) | |
1707 | (is-container (or blank-container (zerop depth))) | |
1708 | ||
1709 | (does-encrypt (and (not is-container) | |
1710 | (allout-encrypted-type-prefix))) | |
1711 | (is-encrypted (and does-encrypt (allout-encrypted-topic-p))) | |
1712 | (icon-end allout-recent-prefix-end) | |
1713 | (icon-start (1- icon-end)) | |
1714 | body-start | |
1715 | body-end | |
1716 | bullet | |
1717 | has-subitems | |
1718 | (contents-depth (1+ depth)) | |
1719 | ) | |
1720 | (widget-put item-widget :depth depth) | |
1721 | (if is-container | |
1722 | ||
1723 | (progn | |
1724 | (widget-put item-widget :from (allout-set-boundary-marker | |
1725 | :from (point-min) | |
1726 | (widget-get item-widget :from))) | |
1727 | (widget-put item-widget :icon-end nil) | |
1728 | (widget-put item-widget :icon-start nil) | |
1729 | (setq body-start (widget-put item-widget :body-start 1))) | |
1730 | ||
1731 | ;; not container: | |
1732 | ||
1733 | (widget-put item-widget :from (allout-set-boundary-marker | |
1734 | :from (if at-beginning | |
1735 | (point) | |
1736 | allout-recent-prefix-beginning) | |
1737 | (widget-get item-widget :from))) | |
1738 | (widget-put item-widget :icon-start icon-start) | |
1739 | (widget-put item-widget :icon-end icon-end) | |
1740 | (when does-encrypt | |
1741 | (widget-put item-widget :does-encrypt t) | |
1742 | (widget-put item-widget :is-encrypted is-encrypted)) | |
1743 | ||
1744 | ;; cue area: | |
1745 | (setq body-start icon-end) | |
1746 | (widget-put item-widget :bullet (setq bullet (allout-get-bullet))) | |
1747 | (if (equal (char-after body-start) ? ) | |
1748 | (setq body-start (1+ body-start))) | |
1749 | (widget-put item-widget :body-start body-start) | |
1750 | ) | |
1751 | ||
1752 | ;; Both container and regular items: | |
1753 | ||
1754 | ;; :body-end (doesn't include a trailing blank line, if any) - | |
1755 | (widget-put item-widget :body-end (setq body-end | |
1756 | (if blank-container | |
1757 | 1 | |
1758 | (allout-end-of-entry)))) | |
1759 | ||
1760 | (widget-put item-widget :to (allout-set-boundary-marker | |
1761 | :to (if blank-container | |
1762 | (point-min) | |
1763 | (or (allout-pre-next-prefix) | |
1764 | (goto-char (point-max)))) | |
1765 | (widget-get item-widget :to))) | |
1766 | (widget-put item-widget :has-subitems | |
1767 | (setq has-subitems | |
1768 | (and | |
1769 | ;; has a subsequent item: | |
1770 | (not (= body-end (point-max))) | |
1771 | ;; subsequent item is deeper: | |
1772 | (< depth (setq contents-depth (allout-recent-depth)))))) | |
1773 | ;; note :expanded - true if widget item's content is currently visible? | |
1774 | (widget-put item-widget :expanded | |
1775 | (and has-subitems | |
1776 | ;; subsequent item is or isn't visible: | |
1777 | (save-excursion | |
1778 | (goto-char allout-recent-prefix-beginning) | |
1779 | (not (allout-hidden-p))))))) | |
1780 | ;;;_ > allout-set-boundary-marker (boundary position &optional current-marker) | |
1781 | (defun allout-set-boundary-marker (boundary position &optional current-marker) | |
1782 | "Set or create item widget BOUNDARY type marker at POSITION. | |
1783 | ||
1784 | Optional CURRENT-MARKER is the marker currently being used for | |
1785 | the boundary, if any. | |
1786 | ||
1787 | BOUNDARY type is either :from or :to, determining the marker insertion type." | |
1788 | (if (not position) (setq position (point))) | |
1789 | (if current-marker | |
1790 | (set-marker current-marker position) | |
1791 | (let ((marker (make-marker))) | |
1792 | ;; XXX dang - would like for :from boundary to advance after inserted | |
1793 | ;; text, but that would omit new header prefixes when allout | |
1794 | ;; relevels, etc. this competes with ad-hoc edits, which would | |
1795 | ;; better be omitted | |
1796 | (set-marker-insertion-type marker nil) | |
1797 | (set-marker marker position)))) | |
1798 | ;;;_ > allout-decorate-item-span (item-widget) | |
1799 | (defun allout-decorate-item-span (item-widget) | |
1800 | "Equip the item with a span, as an entirety. | |
1801 | ||
1802 | This span is implemented so it can be used to detect displacement | |
1803 | of the widget in absolute terms, and provides an offset bias for | |
1804 | the various element spans." | |
1805 | ||
1806 | (if (and (widget-get item-widget :is-container) | |
1807 | ;; the only case where the span could be empty. | |
1808 | (eq (widget-get item-widget :from) | |
1809 | (widget-get item-widget :to))) | |
1810 | nil | |
1811 | (allout-item-span item-widget | |
1812 | (widget-get item-widget :from) | |
1813 | (widget-get item-widget :to)))) | |
1814 | ;;;_ > allout-decorate-item-guides (item-widget | |
1815 | ;;; &optional parent-widget has-successor) | |
1816 | (defun allout-decorate-item-guides (item-widget | |
1817 | &optional parent-widget has-successor) | |
1818 | "Add ITEM-WIDGET guide icon-prefix descender and connector text properties. | |
1819 | ||
1820 | Optional arguments provide context for deriving the guides. In | |
1821 | their absence, the current guide column flags are used. | |
1822 | ||
1823 | Optional PARENT-WIDGET is the widget for the item's parent item. | |
1824 | ||
1825 | Optional HAS-SUCCESSOR is true iff the item is followed by a sibling. | |
1826 | ||
1827 | We also hide the header-prefix string. | |
1828 | ||
1829 | Guides are established according to the item-widget's :guide-column-flags, | |
1830 | when different than :was-guide-column-flags. Changing that property and | |
1831 | reapplying this method will rectify the glyphs." | |
1832 | ||
1833 | (when (not (widget-get item-widget :is-container)) | |
1834 | (let* ((depth (widget-get item-widget :depth)) | |
1835 | (parent-depth (and parent-widget | |
1836 | (widget-get parent-widget :depth))) | |
1837 | (parent-flags (and parent-widget | |
1838 | (widget-get parent-widget :guide-column-flags))) | |
1839 | (parent-flags-depth (length parent-flags)) | |
1840 | (extender-length (- depth (+ parent-flags-depth 2))) | |
1841 | (flags (or (and (> depth 1) | |
1842 | parent-widget | |
1843 | (widget-put item-widget :guide-column-flags | |
1844 | (append (list has-successor) | |
1845 | (if (< 0 extender-length) | |
1846 | (make-list extender-length | |
1847 | '-)) | |
1848 | parent-flags))) | |
1849 | (widget-get item-widget :guide-column-flags))) | |
1850 | (was-flags (widget-get item-widget :was-guide-column-flags)) | |
1851 | (guides-start (widget-get item-widget :from)) | |
1852 | (guides-end (widget-get item-widget :icon-start)) | |
1853 | (position guides-start) | |
1854 | (increment (length allout-header-prefix)) | |
1855 | reverse-flags | |
1856 | guide-name | |
1857 | extenders paint-extenders | |
1858 | (inhibit-read-only t)) | |
1859 | ||
1860 | (when (not (equal was-flags flags)) | |
1861 | ||
1862 | (setq reverse-flags (reverse flags)) | |
1863 | (while reverse-flags | |
1864 | (setq guide-name | |
1865 | (cond ((null (cdr reverse-flags)) | |
1866 | (if (car reverse-flags) | |
1867 | 'mid-connector | |
1868 | 'end-connector)) | |
1869 | ((eq (car reverse-flags) '-) | |
1870 | ;; accumulate extenders tally, to be painted on next | |
1871 | ;; non-extender flag, according to the flag type. | |
1872 | (setq extenders (1+ (or extenders 0))) | |
1873 | nil) | |
1874 | ((car reverse-flags) | |
1875 | 'through-descender) | |
1876 | (t 'skip-descender))) | |
1877 | (when guide-name | |
1878 | (put-text-property position (setq position (+ position increment)) | |
1879 | 'display (allout-fetch-icon-image guide-name)) | |
1880 | (if (> increment 1) (setq increment 1)) | |
1881 | (when extenders | |
1882 | ;; paint extenders after a connector, else leave spaces. | |
1883 | (dotimes (i extenders) | |
1884 | (put-text-property | |
1885 | position (setq position (1+ position)) | |
1886 | 'display (allout-fetch-icon-image | |
1887 | (if (memq guide-name '(mid-connector end-connector)) | |
1888 | 'extender-connector | |
1889 | 'skip-descender)))) | |
1890 | (setq extenders nil))) | |
1891 | (setq reverse-flags (cdr reverse-flags))) | |
1892 | (widget-put item-widget :was-guide-column-flags flags)) | |
1893 | ||
1894 | (allout-item-element-span-is item-widget :guides-span | |
1895 | guides-start guides-end)))) | |
1896 | ;;;_ > allout-decorate-item-icon (item-widget) | |
1897 | (defun allout-decorate-item-icon (item-widget) | |
1898 | "Add item icon glyph and distinctive bullet text properties to ITEM-WIDGET." | |
1899 | ||
1900 | (when (not (widget-get item-widget :is-container)) | |
1901 | (let* ((icon-start (widget-get item-widget :icon-start)) | |
1902 | (icon-end (widget-get item-widget :icon-end)) | |
1903 | (bullet (widget-get item-widget :bullet)) | |
1904 | (use-bullet bullet) | |
1905 | (was-bullet (widget-get item-widget :was-bullet)) | |
1906 | (distinctive (allout-distinctive-bullet bullet)) | |
1907 | (distinctive-start (widget-get item-widget :distinctive-start)) | |
1908 | (distinctive-end (widget-get item-widget :distinctive-end)) | |
1909 | (does-encrypt (widget-get item-widget :does-encrypt)) | |
1910 | (is-encrypted (and does-encrypt (widget-get item-widget | |
1911 | :is-encrypted))) | |
1912 | (expanded (widget-get item-widget :expanded)) | |
1913 | (has-subitems (widget-get item-widget :has-subitems)) | |
1914 | (inhibit-read-only t) | |
1915 | icon-state) | |
1916 | ||
1917 | (when (not (and (equal (widget-get item-widget :was-expanded) expanded) | |
1918 | (equal (widget-get item-widget :was-has-subitems) | |
1919 | has-subitems) | |
1920 | (equal (widget-get item-widget :was-does-encrypt) | |
1921 | does-encrypt) | |
1922 | (equal (widget-get item-widget :was-is-encrypted) | |
1923 | is-encrypted))) | |
1924 | ||
1925 | (setq icon-state | |
1926 | (cond (does-encrypt (if is-encrypted | |
3a00a363 KM |
1927 | 'locked-encrypted |
1928 | 'unlocked-encrypted)) | |
aac7a935 KM |
1929 | (expanded 'opened) |
1930 | (has-subitems 'closed) | |
1931 | (t 'empty))) | |
1932 | (put-text-property icon-start (1+ icon-start) | |
1933 | 'display (allout-fetch-icon-image icon-state)) | |
1934 | (widget-put item-widget :was-expanded expanded) | |
1935 | (widget-put item-widget :was-has-subitems has-subitems) | |
1936 | (widget-put item-widget :was-does-encrypt does-encrypt) | |
1937 | (widget-put item-widget :was-is-encrypted is-encrypted) | |
1938 | ;; preserve as a widget property to track last known: | |
1939 | (widget-put item-widget :icon-state icon-state) | |
1940 | ;; preserve as a text property to track undo: | |
1941 | (put-text-property icon-start icon-end :icon-state icon-state)) | |
1942 | (allout-item-element-span-is item-widget :icon-span | |
1943 | icon-start icon-end) | |
1944 | (when (not (string= was-bullet bullet)) | |
1945 | (cond ((not distinctive) | |
1946 | ;; XXX we strip the prior properties without even checking if | |
1947 | ;; the prior bullet was distinctive, because the widget | |
1948 | ;; provisions to convey that info is disappearing, sigh. | |
1949 | (remove-text-properties icon-end (1+ icon-end) '(display)) | |
1950 | (setq distinctive-start icon-end distinctive-end icon-end) | |
1951 | (widget-put item-widget :distinctive-start distinctive-start) | |
1952 | (widget-put item-widget :distinctive-end distinctive-end)) | |
1953 | ||
1954 | ((not (string= bullet allout-numbered-bullet)) | |
1955 | (setq distinctive-start icon-end distinctive-end (+ icon-end 1))) | |
1956 | ||
1957 | (does-encrypt | |
1958 | (setq distinctive-start icon-end distinctive-end (+ icon-end 1))) | |
1959 | ||
1960 | (t | |
1961 | (goto-char icon-end) | |
1962 | (looking-at "[0-9]+") | |
1963 | (setq use-bullet (buffer-substring icon-end (match-end 0))) | |
1964 | (setq distinctive-start icon-end | |
1965 | distinctive-end (match-end 0)))) | |
1966 | (put-text-property distinctive-start distinctive-end 'display | |
1967 | use-bullet) | |
1968 | (widget-put item-widget :was-bullet bullet) | |
1969 | (widget-put item-widget :distinctive-start distinctive-start) | |
1970 | (widget-put item-widget :distinctive-end distinctive-end))))) | |
1971 | ;;;_ > allout-decorate-item-cue (item-widget) | |
1972 | (defun allout-decorate-item-cue (item-widget) | |
1973 | "Incorporate space between bullet icon and body to the ITEM-WIDGET." | |
1974 | ;; NOTE: most of the cue-area | |
1975 | ||
1976 | (when (not (widget-get item-widget :is-container)) | |
1977 | (let* ((cue-start (or (widget-get item-widget :distinctive-end) | |
1978 | (widget-get item-widget :icon-end))) | |
1979 | (body-start (widget-get item-widget :body-start)) | |
1980 | (expanded (widget-get item-widget :expanded)) | |
1981 | (has-subitems (widget-get item-widget :has-subitems)) | |
1982 | (inhibit-read-only t)) | |
1983 | ||
1984 | (allout-item-element-span-is item-widget :cue-span cue-start body-start) | |
1985 | (put-text-property (1- body-start) body-start 'rear-nonsticky t)))) | |
1986 | ;;;_ > allout-decorate-item-body (item-widget &optional force) | |
1987 | (defun allout-decorate-item-body (item-widget &optional force) | |
1988 | "Incorporate item body text as part the ITEM-WIDGET. | |
1989 | ||
1990 | Optional FORCE means force reassignment of the region property." | |
1991 | ||
1992 | (let* ((allout-inhibit-body-modification-hook t) | |
1993 | (body-start (widget-get item-widget :body-start)) | |
1994 | (body-end (widget-get item-widget :body-end)) | |
1995 | (body-text-end body-end) | |
1996 | (inhibit-read-only t)) | |
1997 | ||
1998 | (allout-item-element-span-is item-widget :body-span | |
1999 | body-start (min (1+ body-end) (point-max)) | |
2000 | force))) | |
2001 | ;;;_ > allout-item-actual-position (item-widget field) | |
2002 | (defun allout-item-actual-position (item-widget field) | |
2003 | "Return ITEM-WIDGET FIELD position taking item displacement into account." | |
2004 | ||
2005 | ;; The item's sub-element positions (:icon-end, :body-start, etc) are | |
2006 | ;; accurate when the item is parsed, but some offsets from the start | |
2007 | ;; drift with text added in the body. | |
2008 | ;; | |
2009 | ;; Rather than reparse an item with every change (inefficient), or derive | |
2010 | ;; every position from a distinct field marker/overlay (prohibitive as | |
2011 | ;; the number of items grows), we use the displacement tracking of the | |
2012 | ;; :span-overlay's markers, against the registered :from or :body-end | |
2013 | ;; (depending on whether the requested field value is before or after the | |
2014 | ;; item body), to bias the registered values. | |
2015 | ;; | |
2016 | ;; This is not necessary/useful when the item is being decorated, because | |
0d327994 | 2017 | ;; that always must be preceded by a fresh item parse. |
aac7a935 KM |
2018 | |
2019 | (if (not (eq field :body-end)) | |
2020 | (widget-get item-widget :from) | |
2021 | ||
2022 | (let* ((span-overlay (widget-get item-widget :span-overlay)) | |
2023 | (body-end-position (widget-get item-widget :body-end)) | |
2024 | (ref-marker-position (and span-overlay | |
2025 | (overlay-end span-overlay))) | |
2026 | (offset (and body-end-position span-overlay | |
2027 | (- (or ref-marker-position 0) | |
2028 | body-end-position)))) | |
2029 | (+ (widget-get item-widget field) (or offset 0))))) | |
2030 | ;;;_ : Item undecoration | |
2031 | ;;;_ > allout-widgets-undecorate-region (start end) | |
2032 | (defun allout-widgets-undecorate-region (start end) | |
2033 | "Eliminate widgets and decorations for all items in region from START to END." | |
2034 | (let ((next start) | |
2035 | widget) | |
2036 | (save-excursion | |
2037 | (goto-char start) | |
2038 | (while (< (setq next (next-single-char-property-change next | |
2039 | 'display | |
2040 | (current-buffer) | |
2041 | end)) | |
2042 | end) | |
2043 | (goto-char next) | |
2044 | (when (setq widget (allout-get-item-widget)) | |
2045 | ;; if the next-property/overly progression got us to a widget: | |
2046 | (allout-widgets-undecorate-item widget t)))))) | |
2047 | ;;;_ > allout-widgets-undecorate-text (text) | |
2048 | (defun allout-widgets-undecorate-text (text) | |
2049 | "Eliminate widgets and decorations for all items in TEXT." | |
2050 | (remove-text-properties 0 (length text) | |
2051 | '(display nil :icon-state nil rear-nonsticky nil | |
2052 | category nil button nil field nil) | |
2053 | text) | |
2054 | text) | |
2055 | ;;;_ > allout-widgets-undecorate-item (item-widget &optional no-expose) | |
2056 | (defun allout-widgets-undecorate-item (item-widget &optional no-expose) | |
2057 | "Remove widget decorations from ITEM-WIDGET. | |
2058 | ||
2059 | Any concealed content head lines and item body is exposed, unless | |
2060 | optional NO-EXPOSE is non-nil." | |
2061 | (let ((from (widget-get item-widget :from)) | |
2062 | (to (widget-get item-widget :to)) | |
2063 | (text-properties-to-remove '(display nil | |
2064 | :icon-state nil | |
2065 | rear-nonsticky nil | |
2066 | category nil | |
2067 | button nil | |
2068 | field nil)) | |
2069 | (span-overlay (widget-get item-widget :span-overlay)) | |
2070 | (button-overlay (widget-get item-widget :button)) | |
2071 | (was-modified (buffer-modified-p)) | |
2072 | (buffer-undo-list t) | |
2073 | (inhibit-read-only t)) | |
2074 | (if (not no-expose) | |
2075 | (allout-flag-region from to nil)) | |
2076 | (allout-unprotected | |
2077 | (remove-text-properties from to text-properties-to-remove)) | |
2078 | (when span-overlay | |
2079 | (delete-overlay span-overlay) (widget-put item-widget :span-overlay nil)) | |
2080 | (when button-overlay | |
2081 | (delete-overlay button-overlay) (widget-put item-widget :button nil)) | |
2082 | (set-marker from nil) | |
2083 | (set-marker to nil) | |
2084 | (if (not was-modified) | |
2085 | (set-buffer-modified-p nil)))) | |
2086 | ||
2087 | ;;;_ : Item decoration support | |
2088 | ;;;_ > allout-item-span (item-widget &optional start end) | |
2089 | (defun allout-item-span (item-widget &optional start end) | |
2090 | "Return or register the location of an ITEM-WIDGET's actual START and END. | |
2091 | ||
2092 | If START and END are not passed in, return either a dotted pair | |
2093 | of the current span, if established, or nil if not yet set. | |
2094 | ||
2095 | When the START and END are passed, return the distance that the | |
2096 | start of the item moved. We return 0 if the span was not | |
2097 | previously established or is not moved." | |
2098 | (let ((overlay (widget-get item-widget :span-overlay)) | |
2099 | was-start was-end | |
2100 | changed) | |
2101 | (cond ((not overlay) (when start | |
2102 | (setq overlay (make-overlay start end nil t nil)) | |
2103 | (overlay-put overlay 'button item-widget) | |
d806ab68 | 2104 | (overlay-put overlay 'evaporate t) |
aac7a935 KM |
2105 | (widget-put item-widget :span-overlay overlay) |
2106 | t)) | |
2107 | ;; report: | |
2108 | ((not start) (cons (overlay-start overlay) (overlay-end overlay))) | |
2109 | ;; move: | |
2110 | ((or (not (equal (overlay-start overlay) start)) | |
2111 | (not (equal (overlay-end overlay) end))) | |
2112 | (move-overlay overlay start end) | |
2113 | t) | |
2114 | ;; specified span already set: | |
2115 | (t nil)))) | |
2116 | ;;;_ > allout-item-element-span-is (item-widget element | |
2117 | ;;; &optional start end force) | |
2118 | (defun allout-item-element-span-is (item-widget element | |
2119 | &optional start end force) | |
2120 | "Return or register the location of the indicated ITEM-WIDGET ELEMENT. | |
2121 | ||
2122 | ELEMENT is one of :guides-span, :icon-span, :cue-span, or :body-span. | |
2123 | ||
2124 | When optional START is specified, optional END must also be. | |
2125 | ||
2126 | START and END are the actual bounds of the region, if provided. | |
2127 | ||
2128 | If START and END are not passed in, we return either a dotted | |
2129 | pair of the current span, if established, or nil if not yet set. | |
2130 | ||
2131 | When the START and END are passed, we return t if the region | |
2132 | changed or nil if not. | |
2133 | ||
2134 | Optional FORCE means force assignment of the region's text | |
2135 | property, even if it's already set." | |
2136 | (let ((span (widget-get item-widget element))) | |
2137 | (cond ((or (not span) force) | |
2138 | (when start | |
2139 | (widget-put item-widget element (cons start end)) | |
2140 | (put-text-property start end 'category | |
2141 | (cdr (assoc element | |
2142 | allout-span-to-category))) | |
2143 | t)) | |
2144 | ;; report: | |
2145 | ((not start) span) | |
2146 | ;; move if necessary: | |
2147 | ((not (and (eq (car span) start) | |
2148 | (eq (cdr span) end))) | |
2149 | (widget-put item-widget element span) | |
2150 | t) | |
2151 | ;; specified span already set: | |
2152 | (t nil)))) | |
2153 | ;;;_ : Item widget retrieval (/ high-level creation): | |
2154 | ;;;_ > allout-get-item-widget (&optional container) | |
2155 | (defun allout-get-item-widget (&optional container) | |
2156 | "Return the widget for the item at point, or nil if no widget yet exists. | |
2157 | ||
2158 | Point must be situated *before* the start of the target item's | |
2159 | body, so we don't get an existing containing item when we're in | |
2160 | the process of creating an item in the middle of another. | |
2161 | ||
2162 | Optional CONTAINER is used to obtain the container item." | |
2163 | (if (or container (zerop (allout-depth))) | |
2164 | allout-container-item-widget | |
2165 | ;; allout-recent-* are calibrated by (allout-depth) if we got here. | |
2166 | (let ((got (widget-at allout-recent-prefix-beginning))) | |
2167 | (if (and got (listp got)) | |
2168 | (if (marker-position (widget-get got :from)) | |
2169 | (and | |
2170 | (>= (point) (widget-apply got :actual-position :from)) | |
2171 | (<= (point) (widget-apply got :actual-position :body-start)) | |
2172 | got) | |
2173 | ;; a wacky residual item - undecorate and disregard: | |
2174 | (allout-widgets-undecorate-item got) | |
2175 | nil))))) | |
2176 | ;;;_ > allout-get-or-create-item-widget (&optional redecorate blank-container) | |
2177 | (defun allout-get-or-create-item-widget (&optional redecorate blank-container) | |
2178 | "Return a widget for the item at point, creating the widget if necessary. | |
2179 | ||
2180 | When creating a widget, we assume there has been a context change | |
2181 | and decorate its siblings and parent, as well. | |
2182 | ||
2183 | Optional BLANK-CONTAINER is for internal use, to fabricate a | |
2184 | meta-container item with an empty body when the first proper | |
2185 | \(non-container\) item starts at the beginning of the file. | |
2186 | ||
2187 | Optional REDECORATE, if non-nil, means to redecorate the widget | |
2188 | if it already exists." | |
2189 | (let ((widget (allout-get-item-widget blank-container)) | |
2190 | (buffer-undo-list t)) | |
2191 | (cond (widget (if redecorate | |
2192 | (allout-redecorate-item widget)) | |
2193 | widget) | |
2194 | ((or blank-container (zerop (allout-depth))) | |
2195 | (or allout-container-item-widget | |
2196 | (setq allout-container-item-widget | |
2197 | (allout-decorate-item-and-context | |
2198 | (widget-convert 'allout-item-widget) | |
2199 | nil blank-container)))) | |
2200 | ;; create a widget for a regular/non-container item: | |
2201 | (t (allout-decorate-item-and-context (widget-convert | |
2202 | 'allout-item-widget)))))) | |
2203 | ;;;_ > allout-get-or-create-parent-widget (&optional redecorate) | |
2204 | (defun allout-get-or-create-parent-widget (&optional redecorate) | |
2205 | "Return widget for parent of item at point, decorating it if necessary. | |
2206 | ||
2207 | We return the container widget if we're above the first proper item in the | |
2208 | file. | |
2209 | ||
2210 | Optional REDECORATE, if non-nil, means to redecorate the widget if it | |
2211 | already exists. | |
2212 | ||
2213 | Point will wind up positioned on the beginning of the parent or beginning | |
2214 | of the buffer." | |
2215 | ;; use existing widget, if there, else establish it | |
2216 | (if (or (bobp) (and (not (allout-ascend)) | |
2217 | (looking-at allout-regexp))) | |
2218 | (allout-get-or-create-item-widget redecorate 'blank-container) | |
2219 | (allout-get-or-create-item-widget redecorate))) | |
2220 | ;;;_ : X- Item ancillaries | |
2221 | ;;;_ >X allout-body-modification-handler (beg end) | |
2222 | (defun allout-body-modification-handler (beg end) | |
2223 | "Do routine processing of body text before and after modification. | |
2224 | ||
2225 | Operation is inhibited by `allout-inhibit-body-modification-handler'." | |
2226 | ||
2227 | ;; The primary duties are: | |
2228 | ;; | |
2229 | ;; - marking of escaped prefix-like text for delayed cleanup of escapes | |
2230 | ;; - removal and replacement of the settings | |
2231 | ;; - maintenance of beginning-of-line guide lines | |
2232 | ;; | |
2233 | ;; ?? Escapes removal \(before changes\) is not done when edits span multiple | |
2234 | ;; items, recognizing that item structure is being preserved, including | |
2235 | ;; escaping of item-prefix-like text within bodies. See | |
2236 | ;; `allout-before-modification-handler' and | |
2237 | ;; `allout-inhibit-body-modification-handler'. | |
2238 | ;; | |
2239 | ;; Adds the overlay to the `allout-unresolved-body-mod-workhash' during | |
2240 | ;; before-change operation, and removes from that list during after-change | |
2241 | ;; operation. | |
2242 | (cond (allout-inhibit-body-modification-hook nil))) | |
2243 | ;;;_ >X allout-graphics-modification-handler (beg end) | |
2244 | (defun allout-graphics-modification-handler (beg end) | |
2245 | "Protect against incoherent deletion of decoration graphics. | |
2246 | ||
2247 | Deletes allowed only when inhibit-read-only is t." | |
2248 | (cond | |
2249 | (undo-in-progress (when (eq (get-text-property beg 'category) | |
2250 | 'allout-icon-span-category) | |
2251 | (save-excursion | |
2252 | (goto-char beg) | |
2253 | (let* ((item-widget (allout-get-item-widget))) | |
2254 | (if item-widget | |
2255 | (allout-widgets-exposure-undo-recorder | |
2256 | item-widget)))))) | |
2257 | (inhibit-read-only t) | |
2258 | ((not (and (boundp 'allout-mode) allout-mode)) t) | |
2259 | ((equal this-command 'quoted-insert) t) | |
2260 | ((yes-or-no-p "Unruly edit of outline structure - allow? ") | |
2261 | (setq allout-widgets-unset-inhibit-read-only (not inhibit-read-only) | |
2262 | inhibit-read-only t)) | |
2263 | (t (error | |
2264 | (substitute-command-keys allout-structure-unruly-deletion-message))))) | |
2265 | ;;;_ > allout-item-icon-key-handler () | |
2266 | (defun allout-item-icon-key-handler () | |
2267 | "Catchall handling of key bindings in item icon/cue hot-spots. | |
2268 | ||
2269 | Applies `allout-hotspot-key-handler' and calls the result, if any, as an | |
2270 | interactive command." | |
2271 | ||
2272 | (interactive) | |
2273 | (let* ((mapped-binding (allout-hotspot-key-handler))) | |
2274 | (when mapped-binding | |
2275 | (call-interactively mapped-binding)))) | |
2276 | ||
2277 | ;;;_ : Status | |
2278 | ;;;_ . allout-item-location (item-widget) | |
2279 | (defun allout-item-location (item-widget) | |
2280 | "Location of the start of the item's text." | |
2281 | (overlay-start (widget-get item-widget :span-overlay))) | |
2282 | ||
2283 | ;;;_ : Icon management | |
2284 | ;;;_ > allout-fetch-icon-image (name) | |
2285 | (defun allout-fetch-icon-image (name) | |
2286 | "Fetch allout icon for symbol NAME. | |
2287 | ||
2288 | We use a caching strategy, so the caller doesn't need to do so." | |
2289 | (let* ((types allout-widgets-icon-types) | |
2290 | (use-dir (if (equal (allout-frame-property nil 'background-mode) | |
2291 | 'light) | |
2292 | allout-widgets-icons-light-subdir | |
2293 | allout-widgets-icons-dark-subdir)) | |
2294 | (key (list name use-dir)) | |
2295 | (got (assoc key allout-widgets-icons-cache))) | |
2296 | (if got | |
2297 | ;; display system shows only first of subsequent adjacent | |
2298 | ;; `eq'-identical repeats - use copies to avoid this problem. | |
2299 | (allout-widgets-copy-list (cadr got)) | |
2300 | (while (and types (not got)) | |
2301 | (setq got | |
2302 | (allout-find-image | |
2303 | (list (append (list :type (car types) | |
2304 | :file (concat use-dir | |
2305 | (symbol-name name) | |
2306 | "." (symbol-name | |
2307 | (car types)))) | |
2308 | (if (featurep 'xemacs) | |
2309 | allout-widgets-item-image-properties-xemacs | |
2310 | allout-widgets-item-image-properties-emacs) | |
2311 | )))) | |
2312 | (setq types (cdr types))) | |
2313 | (if got | |
2314 | (push (list key got) allout-widgets-icons-cache)) | |
2315 | got))) | |
2316 | ||
2317 | ;;;_ : Miscellaneous | |
2318 | ;;;_ > allout-elapsed-time-seconds (triple) | |
2319 | (defun allout-elapsed-time-seconds (end start) | |
2320 | "Return seconds between `current-time' style time START/END triples." | |
2321 | (let ((elapsed (time-subtract end start))) | |
2322 | (+ (* (car elapsed) (expt 2.0 16)) | |
2323 | (cadr elapsed) | |
2324 | (/ (caddr elapsed) (expt 10.0 6))))) | |
2325 | ;;;_ > allout-frame-property (frame property) | |
2326 | (defalias 'allout-frame-property | |
2327 | (cond ((fboundp 'frame-parameter) | |
2328 | 'frame-parameter) | |
2329 | ((fboundp 'frame-property) | |
2330 | 'frame-property) | |
2331 | (t nil))) | |
2332 | ;;;_ > allout-find-image (specs) | |
2333 | (defalias 'allout-find-image | |
2334 | (if (fboundp 'find-image) | |
2335 | 'find-image | |
2336 | nil) ; aka, not-yet-implemented for xemacs. | |
2337 | ) | |
2338 | ;;;_ > allout-widgets-copy-list (list) | |
2339 | (defun allout-widgets-copy-list (list) | |
2340 | ;; duplicated from cl.el 'copy-list' as of 2008-08-17 | |
2341 | "Return a copy of LIST, which may be a dotted list. | |
2342 | The elements of LIST are not copied, just the list structure itself." | |
2343 | (if (consp list) | |
2344 | (let ((res nil)) | |
2345 | (while (consp list) (push (pop list) res)) | |
2346 | (prog1 (nreverse res) (setcdr res list))) | |
2347 | (car list))) | |
d806ab68 KM |
2348 | ;;;_ . allout-widgets-count-buttons-in-region (start end) |
2349 | (defun allout-widgets-count-buttons-in-region (start end) | |
2350 | "Debugging/diagnostic tool - count overlays with 'button' property in region." | |
2351 | (interactive "r") | |
2352 | (setq start (or start (point-min)) | |
2353 | end (or end (point-max))) | |
2354 | (if (> start end) (let ((interim start)) (setq start end end interim))) | |
2355 | (let ((button-overlays (delq nil | |
2356 | (mapcar (function (lambda (o) | |
2357 | (if (overlay-get o 'button) | |
2358 | o))) | |
2359 | (overlays-in start end))))) | |
2360 | (length button-overlays))) | |
aac7a935 KM |
2361 | |
2362 | ;;;_ : Run unit tests: | |
2363 | (defun allout-widgets-run-unit-tests () | |
2364 | (message "Running allout-widget tests...") | |
2365 | ||
2366 | (allout-test-range-overlaps) | |
2367 | ||
2368 | (message "Running allout-widget tests... Done.") | |
2369 | (sit-for .5)) | |
2370 | ||
2371 | (when allout-widgets-run-unit-tests-on-load | |
2372 | (allout-widgets-run-unit-tests)) | |
2373 | ||
2374 | ;;;_ : provide | |
2375 | (provide 'allout-widgets) | |
2376 | ||
2377 | ;;;_. Local emacs vars. | |
2378 | ;;;_ , Local variables: | |
2379 | ;;;_ , allout-layout: (-1 : 0) | |
2380 | ;;;_ , End: |