1 ;;; annotations.el --- interface to marginal annotations
3 ;; Copyright (C) 1992-1994 Free Software Foundation, Inc.
5 ;; Author: Chuck Thompson <cthomp@cs.uiuc.edu>
6 ;; Maintainer: XEmacs Development Team
8 ;; Keywords: extensions, hypermedia, outlines
10 ;; This file is part of XEmacs.
12 ;; XEmacs is free software; you can redistribute it and/or modify it
13 ;; under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 2, or (at your option)
17 ;; XEmacs is distributed in the hope that it will be useful, but
18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 ;; General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with XEmacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 ;; Boston, MA 02111-1307, USA.
27 ;;; Synched up with: Not in FSF.
31 ;; Enhanced by Andy Piper <ajp@eng.cam.ac.uk>: 6-may-94
33 ;; Last modified: 12-May-95 by Chuck Thompson.
35 ;; The annotations are implemented on top of extents. The extent property
36 ;; 'annotation of an extent being used as an annotation is vector of size 6:
37 ;; [<data> <action> <menu> <glyph> <down-glyph> <rightp>]
43 (defvar make-annotation-hook nil
44 "*Function or functions to run immediately after creating an annotation.")
47 (defvar before-delete-annotation-hook nil
48 "*Function or functions to run immediately before deleting an annotation.")
51 (defvar after-delete-annotation-hook nil
52 "*Function or functions to run immediately after deleting an annotation.")
54 (defvar annotation-local-map-default
55 (let ((map (make-sparse-keymap)))
56 (set-keymap-name map 'annotation-local-map)
57 (define-key map 'button1 'annotation-activate-function-default)
58 (define-key map 'button3 'annotation-popup-menu)
60 "Keymap used to activate annotations with only annotation data passed.")
62 (defvar annotation-local-map-with-event
63 (let ((map (make-sparse-keymap)))
64 (set-keymap-name map 'annotation-local-map)
65 (define-key map 'button1 'annotation-activate-function-with-event)
66 (define-key map 'button3 'annotation-popup-menu)
68 "Keymap used to activate annotations with annotation data and event passed.")
71 ;; When the mouse is pressed and released over an annotation glyph
72 ;; this will run the annotation action passing a single arg, the value
73 ;; of the annotation data field.
75 (defun annotation-activate-function-default (event)
77 (let ((extent (event-glyph-extent event))
80 ;; make the glyph look pressed
81 (cond ((annotation-down-glyph extent)
82 (setq up-glyph (annotation-glyph extent))
83 (set-annotation-glyph extent (annotation-down-glyph extent))))
85 (setq event (next-event event))
86 (if (button-release-event-p event)
87 (setq mouse-down nil)))
88 ;; make the glyph look released
89 (cond ((annotation-down-glyph extent)
90 (set-annotation-glyph extent up-glyph)))
91 (if (eq extent (event-glyph-extent event))
92 (if (annotation-action extent)
93 (funcall (annotation-action extent) (annotation-data extent))))))
96 ;; When the mouse is pressed and released over an annotation glyph
97 ;; this will run the annotation action passing two args, the value
98 ;; of the annotation data field and the event which triggered the
101 (defun annotation-activate-function-with-event (event)
103 (let ((extent (event-glyph-extent event))
106 ;; make the glyph look pressed
107 (cond ((annotation-down-glyph extent)
108 (setq up-glyph (annotation-glyph extent))
109 (set-annotation-glyph extent (annotation-down-glyph extent))))
111 (setq event (next-event event))
112 (if (button-release-event-p event)
113 (setq mouse-down nil)))
114 ;; make the glyph look released
115 (cond ((annotation-down-glyph extent)
116 (set-annotation-glyph extent up-glyph)))
117 (if (eq extent (event-glyph-extent event))
118 (if (annotation-action extent)
119 (funcall (annotation-action extent) (annotation-data extent)
122 ;; #### Glyphs should be glyphs should be glyphs
124 (defun make-annotation (glyph &optional pos layout buffer with-event d-glyph rightp)
125 "Create a marginal annotation, displayed using GLYPH, at position POS.
126 GLYPH may be either a glyph object or a string. Use layout policy
127 LAYOUT and place the annotation in buffer BUFFER. If POS is nil, point is
128 used. If LAYOUT is nil, `whitespace' is used. If BUFFER is nil, the
129 current buffer is used. If WITH-EVENT is non-nil, then when an annotation
130 is activated, the triggering event is passed as the second arg to the
131 annotation function. If D-GLYPH is non-nil then it is used as the glyph
132 that will be displayed when button1 is down. If RIGHTP is non-nil then
133 the glyph will be displayed on the right side of the buffer instead of the
135 (let ((new-annotation))
136 ;; get the buffer to add the annotation at
138 (setq buffer (current-buffer))
139 (setq buffer (get-buffer buffer)))
140 ;; get the position to put it at
145 ;; make sure it gets some layout policy
147 (setq layout 'whitespace))
149 ;; make sure the glyph arguments are actually glyphs
150 (if (and glyph (not (glyphp glyph)))
151 (setq glyph (make-glyph glyph)))
152 (if (and d-glyph (not (glyphp d-glyph)))
153 (setq d-glyph (make-glyph d-glyph)))
155 ;; create the actual annotation
156 (setq new-annotation (make-extent pos pos buffer))
157 (detach-extent new-annotation)
158 (set-extent-endpoints new-annotation pos pos)
160 (set-extent-end-glyph new-annotation glyph layout)
161 (set-extent-begin-glyph new-annotation glyph layout))
162 (set-extent-property new-annotation 'annotation
163 (vector nil nil nil glyph d-glyph rightp))
164 (set-extent-property new-annotation 'end-closed t)
165 (set-extent-property new-annotation 'start-open t)
166 (set-extent-property new-annotation 'duplicable t)
168 (set-extent-property new-annotation 'keymap
169 annotation-local-map-with-event)
170 (set-extent-property new-annotation 'keymap
171 annotation-local-map-default))
172 (run-hook-with-args 'make-annotation-hook new-annotation)
175 (fset 'make-graphic-annotation 'make-annotation)
176 (make-obsolete 'make-graphic-annotation 'make-annotation)
179 (defun delete-annotation (annotation)
180 "Remove ANNOTATION from its buffer. This does not modify the buffer text."
181 (if (not (annotationp annotation))
182 (error "%s is not an annotation" annotation)
184 (run-hook-with-args 'before-delete-annotation-hook annotation)
185 (delete-extent annotation)
186 (run-hooks 'after-delete-annotation-hook))))
189 (defun annotationp (annotation)
190 "T if OBJECT is an annotation."
191 (and (extent-live-p annotation)
192 (not (null (extent-property annotation 'annotation)))))
194 (defun annotation-visible (annotation)
195 "T if there is enough available space to display ANNOTATION."
196 (if (not (annotationp annotation))
197 (error "%s is not an annotation" annotation)
198 (not (extent-property annotation 'glyph-invisible))))
201 (defun annotation-at (&optional pos buffer)
202 "Return the first annotation at POS in BUFFER.
203 BUFFER defaults to the current buffer. POS defaults to point in BUFFER."
204 (car (annotations-at pos buffer)))
205 (make-obsolete 'annotation-at 'annotations-at)
207 (defun annotation-layout (annotation)
208 "Return the layout policy of annotation ANNOTATION. The layout policy
209 is set using `set-annotation-layout'."
210 (if (not (annotationp annotation))
211 (error "%s is not an annotation" annotation)
212 (if (eq 'right (annotation-side annotation))
213 (extent-end-glyph-layout annotation)
214 (extent-begin-glyph-layout annotation))))
217 (defun annotation-side (annotation)
218 "Return the side of the buffer the annotation is displayed on.
219 Return value is either 'left or 'right."
220 (if (aref (extent-property annotation 'annotation) 5)
224 (defun set-annotation-layout (annotation layout)
225 "Set the layout policy of ANNOTATION to LAYOUT. The function
226 `annotation-layout' returns the current layout policy."
227 (if (not (annotationp annotation))
228 (error "%s is not an annotation" annotation)
229 (if (eq 'right (annotation-side annotation))
230 (set-extent-end-glyph-layout annotation layout)
231 (set-extent-begin-glyph-layout annotation layout))))
233 ;; Now that annotations use glyphs this function has little value and
234 ;; will actually not work as is.
235 ;(defun annotation-type (annotation)
236 ; "Return the display type of the annotation ANNOTATION. The type will
237 ;be one of the following symbols:
242 ; nil (the object is not an annotation)"
243 ; (if (not (annotationp annotation))
245 ; (let ((glyph (annotation-glyph annotation)))
246 ; (if (stringp glyph)
248 ; (if (not (pixmapp glyph))
249 ; (error "%s is a corrupt annotation" annotation)
250 ; (if (> (pixmap-depth glyph) 0)
253 (make-obsolete 'annotation-type "This function no longer has any meaning.")
255 (defun annotation-width (annotation)
256 "Return the width of the annotation ANNOTATION in pixels."
257 (if (not (annotationp annotation))
258 (error "%s is not an annotation" annotation)
259 (glyph-width (annotation-glyph annotation))))
261 (defun annotation-glyph (annotation)
262 "If ANNOTATION is of type `string' return the string. Otherwise, return
263 the glyph object used to display ANNOTATION. The glyph is set using
264 `set-annotation-glyph'."
265 (if (not (annotationp annotation))
266 (error "%s is not an annotation" annotation)
267 (aref (extent-property annotation 'annotation) 3)))
269 (defun set-annotation-glyph (annotation glyph &optional layout side)
270 "Set the representation of ANNOTATION to GLYPH.
271 GLYPH should be a glyph object. If LAYOUT is non-nil, set the layout
272 policy of the annotation to LAYOUT. If SIDE is equal to 'left or 'right
273 change the side of the annotation to that value.
274 The function `annotation-glyph' returns the current glyph."
275 (if (not (annotationp annotation))
276 (error "%s is not an annotation" annotation)
278 (or layout (setq layout (annotation-layout annotation)))
279 (or side (setq side (annotation-side annotation)))
280 (cond ((eq side 'left)
281 (set-extent-begin-glyph annotation glyph layout)
282 (set-extent-end-glyph annotation nil)
283 (aset (extent-property annotation 'annotation) 5 nil))
285 (set-extent-end-glyph annotation glyph layout)
286 (set-extent-begin-glyph annotation nil)
287 (aset (extent-property annotation 'annotation) 5 nil)))
288 (aset (extent-property annotation 'annotation) 3 glyph)
289 (annotation-glyph annotation)))
291 (defun annotation-down-glyph (annotation)
292 "If ANNOTATION is of type `string' return the down string. Otherwise,
293 return the glyph object of the down-glyph representing ANNOTATION.
294 The down-glyph is set using `set-annotation-down-glyph'."
295 (if (not (annotationp annotation))
296 (error "%s is not an annotation" annotation)
297 (aref (extent-property annotation 'annotation) 4)))
299 (defun set-annotation-down-glyph (annotation glyph)
300 "Set the depressed representation of ANNOTATION to GLYPH.
301 GLYPH should be a glyph object.
302 The function `annotation-down-glyph' returns the current down-glyph."
303 (if (not (annotationp annotation))
304 (error "%s is not an annotation" annotation)
305 (aset (extent-property annotation 'annotation) 4 glyph)))
307 (define-obsolete-function-alias 'annotation-graphic 'annotation-glyph)
308 (define-obsolete-function-alias 'set-annotation-graphic 'set-annotation-glyph)
310 (defun annotation-data (annotation)
311 "Return the data associated with annotation ANNOTATION. The data is
312 set using `set-annotation-data'."
313 (if (not (annotationp annotation))
314 (error "%s is not an annotation" annotation)
315 (aref (extent-property annotation 'annotation) 0)))
317 (defun set-annotation-data (annotation data)
318 "Set the data field of ANNOTATION to DATA.
319 The function `annotation-data' returns the current data."
320 (if (not (annotationp annotation))
321 (error "%s is not an annotation" annotation)
322 (aset (extent-property annotation 'annotation) 0 data)))
324 (defun annotation-action (annotation)
325 "Return the action associated with annotation ANNOTATION. The action
326 is set using `set-annotation-action'."
327 (if (not (annotationp annotation))
328 (error "%s is not an annotation" annotation)
329 (aref (extent-property annotation 'annotation) 1)))
331 (defun set-annotation-action (annotation action)
332 "Set the action field of ANNOTATION to ACTION.
333 The function `annotation-action' returns the current action."
334 (if (not (annotationp annotation))
335 (error "%s is not an annotation" annotation)
336 (aset (extent-property annotation 'annotation) 1 action)))
338 (defun annotation-face (annotation)
339 "Return the face associated with annotation ANNOTATION.
340 The face is set using `set-annotation-face'."
341 (if (not (annotationp annotation))
342 (error "%s is not an annotation" annotation)
343 (extent-face annotation)))
345 (defun set-annotation-face (annotation face)
346 "Set the face associated with annotation ANNOTATION to FACE.
347 The function `annotation-face' returns the current face."
348 (if (not (annotationp annotation))
349 (error "%s is not an annotation" annotation)
350 (set-extent-face annotation face)))
352 (defun hide-annotation (annotation)
353 "Remove ANNOTATION's glyph so that it is invisible."
354 (if (eq (annotation-side annotation) 'left)
355 (set-extent-begin-glyph annotation nil)
356 (set-extent-end-glyph annotation nil)))
357 (define-obsolete-function-alias 'annotation-hide 'hide-annotation)
359 (defun reveal-annotation (annotation)
360 "Add ANNOTATION's glyph so that it is visible."
361 (if (eq (annotation-side annotation) 'left)
362 (set-extent-begin-glyph annotation (annotation-glyph annotation))
363 (set-extent-end-glyph annotation (annotation-glyph annotation))))
364 (define-obsolete-function-alias 'annotation-reveal 'reveal-annotation)
367 (defun annotations-in-region (start end buffer)
368 "Return all annotations in BUFFER between START and END inclusively."
372 (if (< start (point-min))
373 (error "<start> not in range of buffer"))
374 (if (> end (point-max))
375 (error "<end> not in range of buffer"))
378 (map-extents #'(lambda (extent dummy)
380 (setq note-list (cons extent note-list))
382 buffer start end nil 'end-closed 'annotation)
386 (defun annotations-at (&optional pos buffer)
387 "Return a list of all annotations at POS in BUFFER.
388 If BUFFER is nil, the current buffer is used. If POS is nil, point is used."
390 (setq buffer (current-buffer)))
396 (annotations-in-region pos pos buffer)
400 (defun annotation-list (&optional buffer)
401 "Return a list of all annotations in BUFFER.
402 If BUFFER is nil, the current buffer is used."
404 (setq buffer (current-buffer)))
408 (annotations-in-region (point-min) (point-max) buffer)))
411 (defun all-annotations ()
412 "Return a list of all annotations in existence."
413 (let ((b (buffer-list))
416 (setq result (nconc result (annotation-list (car b))))
420 ;;; #### really this menus junk should append to the prevailing menu
421 ;;; in the same way `popup-mode-menu' does. --jwz
423 ;; annotations menu stuff
424 (defun annotation-popup-menu (event)
425 "Pop up a menu of annotations commands.
426 Point is temporarily moved to the click position."
428 (let ((extent (event-glyph-extent event)))
430 (goto-char (extent-end-position extent))
431 (if (annotation-menu extent)
432 (popup-menu (annotation-menu extent))
433 (popup-mode-menu)))))
435 (defun set-annotation-menu (annotation menu)
436 "Set the menu field of ANNOTATION to MENU. The function
437 `annotation-menu' returns the current menu."
438 (if (not (annotationp annotation))
439 (error "%s is not an annotation" annotation)
440 (aset (extent-property annotation 'annotation) 2 menu)))
442 (defun annotation-menu (annotation)
443 "Return the menu associated with annotation ANNOTATION. The menu
444 is set using `set-annotation-menu'."
445 (if (not (annotationp annotation))
446 (error "%s is not an annotation" annotation)
447 (aref (extent-property annotation 'annotation) 2)))
449 (provide 'annotations)
451 ;;; annotations.el ends here