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1 | ;;; artist.el --- draw ascii graphics with your mouse |
2 | ||
3 | ;; Copyright (C) 2000 Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: Tomas Abrahamsson <tab@lysator.liu.se> | |
6 | ;; Maintainer: Tomas Abrahamsson <tab@lysator.liu.se> | |
7 | ;; Keywords: mouse | |
8 | ;; Version: 1.2.2 | |
9 | ;; Release-date: 22-Oct-2000 | |
10 | ;; Location: http://www.lysator.liu.se/~tab/artist/ | |
11 | ||
12 | ;; This file is part of GNU Emacs. | |
13 | ||
14 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
15 | ;; it under the terms of the GNU General Public License as published by | |
16 | ;; the Free Software Foundation; either version 2, or (at your option) | |
17 | ;; any later version. | |
18 | ||
19 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
20 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | ;; GNU General Public License for more details. | |
23 | ||
24 | ;; You should have received a copy of the GNU General Public License | |
25 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
26 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
27 | ;; Boston, MA 02111-1307, USA. | |
28 | ||
29 | ;;; Commentary: | |
30 | ||
31 | ;; What is artist? | |
32 | ;; --------------- | |
33 | ;; | |
34 | ;; Artist is an Emacs lisp package that allows you to draw lines, | |
35 | ;; rectangles and ellipses by using your mouse and/or keyboard. The | |
36 | ;; shapes are made up with the ascii characters |, -, / and \. | |
37 | ;; | |
38 | ;; Features are: | |
39 | ;; | |
40 | ;; * Intersecting: When a `|' intersects with a `-', a `+' is | |
41 | ;; drawn, like this: | \ / | |
42 | ;; --+-- X | |
43 | ;; | / \ | |
44 | ;; | |
45 | ;; * Rubber-banding: When drawing lines you can interactively see the | |
46 | ;; result while holding the mouse button down and moving the mouse. If | |
47 | ;; your machine is not fast enough (a 386 is a bit to slow, but a | |
48 | ;; pentium is well enough), you can turn this feature off. You will | |
49 | ;; then see 1's and 2's which mark the 1st and 2nd endpoint of the line | |
50 | ;; you are drawing. | |
51 | ;; | |
52 | ;; * Drawing operations: The following drawing operations are implemented: | |
53 | ;; | |
54 | ;; lines straight-lines | |
55 | ;; rectangles squares | |
56 | ;; poly-lines straight poly-lines | |
57 | ;; ellipses circles | |
58 | ;; text (see-thru) text (overwrite) | |
59 | ;; spray-can setting size for spraying | |
60 | ;; vaporize line vaporize lines | |
61 | ;; erase characters erase rectangles | |
62 | ;; | |
63 | ;; Straight lines are lines that go horizontally, vertically or | |
64 | ;; diagonally. Plain lines go in any direction. The operations in | |
65 | ;; the right column are accessed by holding down the shift key while | |
66 | ;; drawing. | |
67 | ;; | |
68 | ;; It is possible to vaporize (erase) entire lines and connected lines | |
69 | ;; (rectangles for example) as long as the lines being vaporized are | |
70 | ;; straight and connected at their endpoints. Vaporizing is inspired | |
71 | ;; by the drawrect package by Jari Aalto <jari.aalto@poboxes.com>. | |
72 | ;; | |
73 | ;; * Flood-filling: You can fill any area with a certain character by | |
74 | ;; flood-filling. | |
75 | ;; | |
76 | ;; * Cut copy and paste: You can cut, copy and paste rectangular | |
77 | ;; regions. Artist also interfaces with the rect package (this can be | |
78 | ;; turned off if it causes you any trouble) so anything you cut in | |
79 | ;; artist can be yanked with C-x r y and vice versa. | |
80 | ;; | |
81 | ;; * Drawing with keys: Everything you can do with the mouse, you can | |
82 | ;; also do without the mouse. | |
83 | ;; | |
84 | ;; * Arrows: After having drawn a (straight) line or a (straight) | |
85 | ;; poly-line, you can set arrows on the line-ends by typing < or >. | |
86 | ;; | |
87 | ;; * Aspect-ratio: You can set the variable artist-aspect-ratio to | |
88 | ;; reflect the height-width ratio for the font you are using. Squares | |
89 | ;; and circles are then drawn square/round. Note, that once your | |
90 | ;; ascii-file is shown with font with a different height-width ratio, | |
91 | ;; the squares won't be square and the circles won't be round. | |
92 | ;; | |
93 | ;; * Picture mode compatibility: Artist is picture mode compatible (this | |
94 | ;; can be turned off). | |
95 | ;; | |
96 | ;; See the documentation for the function artist-mode for a detailed | |
97 | ;; description on how to use artist. | |
98 | ;; | |
99 | ;; | |
100 | ;; What about adding my own drawing modes? | |
101 | ;; --------------------------------------- | |
102 | ;; | |
103 | ;; See the short guide at the end of this file. | |
104 | ;; If you add a new drawing mode, send it to me, and I would gladly | |
105 | ;; include in the next release! | |
106 | ||
107 | ||
108 | ;;; Installation: | |
109 | ||
110 | ;; To use artist, put this in your .emacs: | |
111 | ;; | |
112 | ;; (autoload 'artist-mode "artist" "Enter artist-mode" t) | |
113 | ||
114 | ||
115 | ;;; Requirements: | |
116 | ||
117 | ;; Artist requires Emacs 19.28 or higher. | |
118 | ;; | |
119 | ;; Artist requires the `rect' package (which comes with Emacs) to be | |
120 | ;; loadable, unless the variable `artist-interface-with-rect' is set | |
121 | ;; to nil. | |
122 | ;; | |
123 | ;; Artist also requires the Picture mode (which also comes with Emacs) | |
124 | ;; to be loadable, unless the variable `artist-picture-compatibility' | |
125 | ;; is set to nil. | |
126 | ||
127 | ;;; Known bugs: | |
128 | ||
129 | ;; The shifted operations are not available when drawing with the mouse | |
130 | ;; in Emacs 19.29 and 19.30. | |
131 | ;; | |
132 | ;; It is not possible to change between shifted and unshifted operation | |
133 | ;; while drawing with the mouse. (See the comment in the function | |
134 | ;; artist-shift-has-changed for further details.) | |
135 | ||
136 | ||
137 | ;;; ChangeLog: | |
138 | ||
139 | ;; 1.2.2 19-Nov-2000 | |
140 | ;; Changed: More documentation fixes. | |
141 | ;; Bugfix: The arrow characters (`artist-arrows'), which | |
142 | ;; got wrong in 1.1, are now corrected. | |
143 | ;; | |
144 | ;; 1.2.1 15-Nov-2000 | |
145 | ;; New: Documentation fixes. | |
146 | ;; Bugfix: Sets next-line-add-newlines to t while in artist-mode. | |
147 | ;; Drawing with keys was confusing without this fix, if | |
148 | ;; next-line-add-newlines was set to nil. | |
149 | ;; Thanks to Tatsuo Furukawa <tatsuo@kobe.hp.com> for this. | |
150 | ;; | |
151 | ;; 1.2 22-Oct-2000 | |
152 | ;; New: Updated to work with Emacs 21 | |
153 | ;; | |
154 | ;; 1.1 15-Aug-2000 | |
155 | ;; Bugfix: Cursor follows mouse pointer more closely. | |
156 | ;; New: Works with Emacs 20.x | |
157 | ;; New: Variables are customizable | |
158 | ;; | |
159 | ;; 1.1-beta1 21-Apr-1998 | |
160 | ;; New: Spray-can (Utterly useless, I believe, but it was fun | |
161 | ;; to implement :-) after an idea by Karl-Johan Karlsson | |
162 | ;; <kj@lysator.liu.se>. | |
163 | ;; New: Freehand drawing (with pen). | |
164 | ;; New: Vaporizing lines. | |
165 | ;; New: Text-rendering using figlet. | |
166 | ;; New: Picture mode compatibility. | |
167 | ;; Changed: All Artist keys now uses the prefix C-c C-a not to conflict | |
168 | ;; with Picture mode. | |
169 | ;; Bugfix: No longer leaves traces of lines when rubberbanding | |
170 | ;; if the buffer auto-scrolls. | |
171 | ;; Bugfix: Infinite loop sometimes when rubberbanding was turned | |
172 | ;; off. | |
173 | ;; | |
174 | ;; 1.0 01-Mar-1998 | |
175 | ;; First official release. | |
176 | ||
177 | ;;; Code: | |
178 | ||
179 | ;; Variables | |
180 | ||
181 | (defconst artist-version "1.2.2") | |
182 | (defconst artist-maintainer-address "tab@lysator.liu.se") | |
183 | ||
184 | ||
185 | (eval-and-compile | |
186 | (condition-case () | |
187 | (require 'custom) | |
188 | (error nil)) | |
189 | (if (and (featurep 'custom) (fboundp 'custom-declare-variable)) | |
190 | nil ;; We've got what we needed | |
191 | ;; We have the old custom-library, hack around it! | |
192 | (defmacro defgroup (&rest args) | |
193 | nil) | |
194 | (defmacro defface (var values doc &rest args) | |
195 | (` (make-face (, var)))) | |
196 | (defmacro defcustom (var value doc &rest args) | |
197 | (` (defvar (, var) (, value) (, doc)))))) | |
198 | ||
199 | ;; User options | |
200 | ;; vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv | |
201 | ||
202 | (defgroup artist nil | |
203 | "Customization of the Artist mode." | |
204 | :group 'mouse) | |
205 | ||
206 | (defgroup artist-text nil | |
207 | "Customization of the text rendering." | |
208 | :group 'artist) | |
209 | ||
210 | (defcustom artist-rubber-banding t | |
211 | "Interactively do rubber-banding when non-nil." | |
212 | :group 'artist | |
213 | :type 'boolean) | |
214 | ||
215 | (defcustom artist-first-char ?1 | |
216 | "Character to set at first point when not rubber-banding." | |
217 | :group 'artist | |
218 | :type 'character) | |
219 | ||
220 | (defcustom artist-second-char ?2 | |
221 | "Character to set at second point when not rubber-banding." | |
222 | :group 'artist | |
223 | :type 'character) | |
224 | ||
225 | (defcustom artist-interface-with-rect t | |
226 | "Whether to interface with the rect package or not. | |
227 | ||
228 | Interfacing to the rect package means that the Copy and Paste operations | |
229 | will use the rectangle buffer when accessing the copied area. This means | |
230 | that you can insert a rectangle which is copied using the artist package | |
231 | and vice versa. | |
232 | ||
233 | If this causes any problem for you (for example, if the implementation of | |
234 | the rectangle package changes), you can set this variable to nil, and the | |
235 | artist package will use its own copy buffer." | |
236 | :group 'artist | |
237 | :type 'boolean) | |
238 | ||
239 | (defvar artist-arrows [ ?> nil ?v ?L ?< nil ?^ nil ] | |
240 | ;; This is a defvar, not a defcustom, since the custom | |
241 | ;; package shows vectors of characters as a vector of integers, | |
242 | ;; which is confusing | |
243 | "A vector of characters to use as arrows. | |
244 | ||
245 | The vector is 8 elements long and contains a character for each | |
246 | direction, or nil if there is no suitable character to use for arrow | |
247 | in that direction. | |
248 | ||
249 | The directions are as follows: | |
250 | ||
251 | 5 6 7 | |
252 | \\ | / | |
253 | 4 - * - 0 | |
254 | / | \\ | |
255 | 3 2 1") | |
256 | ||
257 | (defcustom artist-aspect-ratio 1 | |
258 | "Defines the character height-to-width aspect ratio. | |
259 | This is used when drawing squares and circles. If the height of the" | |
260 | :group 'artist | |
261 | :type 'number) | |
262 | ||
263 | (defcustom artist-trim-line-endings t | |
264 | "Whether or not to remove white-space at end of lines. | |
265 | ||
266 | If non-nil, line-endings are trimmed (that is, extraneous white-space | |
267 | at the end of the line is removed) when the shape is drawn." | |
268 | :group 'artist | |
269 | :type 'boolean) | |
270 | ||
271 | ||
272 | (defcustom artist-flood-fill-right-border 'window-width | |
273 | "Right edge definition, used when flood-filling. | |
274 | ||
275 | When flood-filling, if the area is not closed off to the right, then | |
276 | flood-filling will fill no more to the right than specified by this | |
277 | variable. This limit is called the fill-border." | |
278 | :group 'artist | |
279 | :type '(choice (const :tag "limited to window" window-width) | |
280 | (const :tag "limited to value of `fill-column'" fill-column))) | |
281 | ||
282 | (defcustom artist-flood-fill-show-incrementally t | |
283 | "Whether or not to incrementally update display when flood-filling. | |
284 | ||
285 | If non-nil, incrementally update display when flood-filling. | |
286 | If set to non-nil, this currently implies discarding any input events | |
287 | during the flood-fill." | |
288 | :group 'artist | |
289 | :type 'boolean) | |
290 | ||
291 | ||
292 | (defcustom artist-ellipse-right-char ?\) | |
293 | "Character to use at the rightmost position when drawing narrow ellipses. | |
294 | ||
295 | In this figure, it is the right parenthesis (the ``)'' character): | |
296 | ----- | |
297 | ( ) | |
298 | -----" | |
299 | :group 'artist | |
300 | :type 'character) | |
301 | ||
302 | ||
303 | (defcustom artist-ellipse-left-char ?\( | |
304 | "Character to use at the leftmost position when drawing narrow ellipses. | |
305 | ||
306 | In this figure, it is the left parenthesis (the ``('' character): | |
307 | ----- | |
308 | ( ) | |
309 | -----" | |
310 | :group 'artist | |
311 | :type 'character) | |
312 | ||
313 | (defcustom artist-picture-compatibility t | |
314 | "Whether or not picture mode compatibility is on." | |
315 | :group 'artist | |
316 | :type 'boolean) | |
317 | ||
318 | ||
319 | ||
320 | ||
321 | (defcustom artist-vaporize-fuzziness 1 | |
322 | "How to vaporize lines that are cut off. | |
323 | ||
324 | Accept this many characters cutting off a line and still treat | |
325 | it as one line. | |
326 | Example: | |
327 | If `artist-vaporize-fuzziness' is 2, then those will be recognized as | |
328 | lines from A to B (provided you start vaporizing them at the ``*''): | |
329 | / | |
330 | A----*------/-----------B | |
331 | \\/ | |
332 | A----*----/\\------------B | |
333 | / \\ | |
334 | ||
335 | but this one won't, since it is cut off by more than 2 characters: | |
336 | \\/ / | |
337 | A----*----/\\/----------B | |
338 | / /\\ | |
339 | (in fact, only the left part (between the A and the leftmost ``/'' | |
340 | crossing the line) will be vaporized)" | |
341 | :group 'artist | |
342 | :type 'integer) | |
343 | ||
344 | ||
345 | (defvar artist-pointer-shape (if (eq window-system 'x) x-pointer-crosshair nil) | |
346 | "*If in X Windows, use this pointer shape while drawing with the mouse.") | |
347 | ||
348 | ||
349 | (defcustom artist-text-renderer 'artist-figlet | |
350 | "Function for doing text rendering." | |
351 | :group 'artist-text | |
352 | :type 'symbol) | |
353 | ||
354 | ||
355 | (defcustom artist-figlet-program "figlet" | |
356 | "Program to run for `figlet'." | |
357 | :group 'artist-text | |
358 | :type 'string) | |
359 | ||
360 | ||
361 | (defcustom artist-figlet-default-font "standard" | |
362 | "Default font for `figlet'." | |
363 | :group 'artist-text | |
364 | :type 'string) | |
365 | ||
366 | ||
367 | (defcustom artist-figlet-list-fonts-command | |
368 | ;; list files ending with *.flf in any directory printed by the | |
369 | ;; ``figlet -I2'' command. I think this will not produce more than | |
370 | ;; one directory, but it never hurts to be on the safe side... | |
371 | "for dir in `figlet -I2`; do cd $dir; ls *.flf; done" | |
372 | "Command to run to get list of available fonts." | |
373 | :group 'artist-text | |
374 | :type 'string) | |
375 | ||
376 | ||
377 | (defcustom artist-spray-interval 0.2 | |
378 | "Number of seconds between repeated spraying." | |
379 | :group 'artist | |
380 | :type 'number) | |
381 | ||
382 | ||
383 | (defcustom artist-spray-radius 4 | |
384 | "Size of the area for spraying." | |
385 | :group 'artist | |
386 | :type 'integer) | |
387 | ||
388 | ||
389 | (defvar artist-spray-chars '(?\ ?. ?- ?+ ?m ?% ?* ?#) | |
390 | ;; This is a defvar, not a defcustom, since the custom | |
391 | ;; package shows lists of characters as a lists of integers, | |
392 | ;; which is confusing | |
393 | "*Characters (``color'') to use when spraying. | |
394 | They should be ordered | |
395 | from the ``lightest'' to the ``heaviest'' since spraying replaces a | |
396 | light character with the next heavier one.") | |
397 | ||
398 | ||
399 | (defvar artist-spray-new-char ?. | |
400 | "*Initial character to use when spraying. | |
401 | This character is used if spraying upon a character that is | |
402 | not in `artist-spray-chars'. The character defined by this variable | |
403 | should be in `artist-spray-chars', or spraying will behave | |
404 | strangely.") | |
405 | ||
406 | ||
407 | ;; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
408 | ;; End of user options | |
409 | ||
410 | ||
411 | ;; Internal variables | |
412 | ;; | |
413 | (defvar artist-mode nil | |
414 | "Non-nil to enable `artist-mode' and nil to disable.") | |
415 | (make-variable-buffer-local 'artist-mode) | |
416 | ||
417 | (defvar artist-mode-name " Artist" | |
418 | "Name of artist mode beginning with a space (appears in the mode-line).") | |
419 | ||
420 | (defvar artist-curr-go 'pen-char | |
421 | "Current selected graphics operation.") | |
422 | (make-variable-buffer-local 'artist-curr-go) | |
423 | ||
424 | (defvar artist-line-char-set nil | |
425 | "Boolean to tell whether user has set some char to use when drawing lines.") | |
426 | (make-variable-buffer-local 'artist-line-char-set) | |
427 | ||
428 | (defvar artist-line-char nil | |
429 | "Char to use when drawing lines.") | |
430 | (make-variable-buffer-local 'artist-line-char) | |
431 | ||
432 | (defvar artist-fill-char-set nil | |
433 | "Boolean to tell whether user has set some char to use when filling.") | |
434 | (make-variable-buffer-local 'artist-fill-char-set) | |
435 | ||
436 | (defvar artist-fill-char nil | |
437 | "Char to use when filling.") | |
438 | (make-variable-buffer-local 'artist-fill-char) | |
439 | ||
440 | (defvar artist-erase-char ?\ | |
441 | "Char to use when erasing.") | |
442 | (make-variable-buffer-local 'artist-erase-char) | |
443 | ||
444 | (defvar artist-default-fill-char ?. | |
445 | "Char to use when a fill-char is required but none is set.") | |
446 | (make-variable-buffer-local 'artist-default-fill-char) | |
447 | ||
448 | ; This variable is not buffer local | |
449 | (defvar artist-copy-buffer nil | |
450 | "Copy buffer.") | |
451 | ||
452 | (defvar artist-draw-region-min-y 0 | |
453 | "Line-number for top-most visited line for draw operation.") | |
454 | (make-variable-buffer-local 'artist-draw-region-min-y) | |
455 | ||
456 | (defvar artist-draw-region-max-y 0 | |
457 | "Line-number for bottom-most visited line for draw operation.") | |
458 | (make-variable-buffer-local 'artist-draw-region-max-y) | |
459 | ||
460 | (defvar artist-borderless-shapes nil | |
461 | "When non-nil, draw shapes without border. | |
462 | The fill char is used instead, if it is set.") | |
463 | (make-variable-buffer-local 'artist-borderless-shapes) | |
464 | ||
465 | ||
466 | (eval-when-compile | |
467 | ;; Make rect available at compile-time | |
468 | (require 'rect) ; for interfacing with rect | |
469 | (require 'reporter) ; the bug-reporting tool | |
470 | (require 'picture)) ; picture mode compatibility | |
471 | ||
472 | (if artist-interface-with-rect | |
473 | (require 'rect)) | |
474 | ||
475 | (require 'reporter) | |
476 | ||
477 | (if artist-picture-compatibility | |
478 | (require 'picture)) | |
479 | ||
480 | ||
481 | (defvar artist-mode-map | |
482 | (let ((map (make-sparse-keymap))) | |
483 | (setq artist-mode-map (make-sparse-keymap)) | |
484 | (define-key map [down-mouse-1] 'artist-down-mouse-1) | |
485 | (define-key map [S-down-mouse-1] 'artist-down-mouse-1) | |
486 | (define-key map [down-mouse-2] 'artist-mouse-choose-operation) | |
487 | (define-key map [S-down-mouse-2] 'artist-mouse-choose-operation) | |
488 | (define-key map [down-mouse-3] 'artist-down-mouse-3) | |
489 | (define-key map [S-down-mouse-3] 'artist-down-mouse-3) | |
490 | (define-key map "\r" 'artist-key-set-point) ; return | |
491 | (define-key map [up] 'artist-previous-line) | |
492 | (define-key map "\C-p" 'artist-previous-line) | |
493 | (define-key map [down] 'artist-next-line) | |
494 | (define-key map "\C-n" 'artist-next-line) | |
495 | (define-key map [left] 'artist-backward-char) | |
496 | (define-key map "\C-b" 'artist-backward-char) | |
497 | (define-key map [right] 'artist-forward-char) | |
498 | (define-key map "\C-f" 'artist-forward-char) | |
499 | (define-key map "<" 'artist-toggle-first-arrow) | |
500 | (define-key map ">" 'artist-toggle-second-arrow) | |
501 | (define-key map "\C-c\C-a\C-e" 'artist-select-erase-char) | |
502 | (define-key map "\C-c\C-a\C-f" 'artist-select-fill-char) | |
503 | (define-key map "\C-c\C-a\C-l" 'artist-select-line-char) | |
504 | (define-key map "\C-c\C-a\C-o" 'artist-select-operation) | |
505 | (define-key map "\C-c\C-a\C-r" 'artist-toggle-rubber-banding) | |
506 | (define-key map "\C-c\C-a\C-t" 'artist-toggle-trim-line-endings) | |
507 | (define-key map "\C-c\C-a\C-s" 'artist-toggle-borderless-shapes) | |
508 | (define-key map "\C-c\C-c" 'artist-mode-off) | |
509 | (define-key map "\C-c\C-al" 'artist-select-op-line) | |
510 | (define-key map "\C-c\C-aL" 'artist-select-op-straight-line) | |
511 | (define-key map "\C-c\C-ar" 'artist-select-op-rectangle) | |
512 | (define-key map "\C-c\C-aR" 'artist-select-op-square) | |
513 | (define-key map "\C-c\C-as" 'artist-select-op-square) | |
514 | (define-key map "\C-c\C-ap" 'artist-select-op-poly-line) | |
515 | (define-key map "\C-c\C-aP" 'artist-select-op-straight-poly-line) | |
516 | (define-key map "\C-c\C-ae" 'artist-select-op-ellipse) | |
517 | (define-key map "\C-c\C-ac" 'artist-select-op-circle) | |
518 | (define-key map "\C-c\C-at" 'artist-select-op-text-see-thru) | |
519 | (define-key map "\C-c\C-aT" 'artist-select-op-text-overwrite) | |
520 | (define-key map "\C-c\C-aS" 'artist-select-op-spray-can) | |
521 | (define-key map "\C-c\C-az" 'artist-select-op-spray-set-size) | |
522 | (define-key map "\C-c\C-a\C-d" 'artist-select-op-erase-char) | |
523 | (define-key map "\C-c\C-aE" 'artist-select-op-erase-rectangle) | |
524 | (define-key map "\C-c\C-av" 'artist-select-op-vaporize-line) | |
525 | (define-key map "\C-c\C-aV" 'artist-select-op-vaporize-lines) | |
526 | (define-key map "\C-c\C-a\C-k" 'artist-select-op-cut-rectangle) | |
527 | (define-key map "\C-c\C-a\M-w" 'artist-select-op-copy-rectangle) | |
528 | (define-key map "\C-c\C-a\C-y" 'artist-select-op-paste) | |
529 | (define-key map "\C-c\C-af" 'artist-select-op-flood-fill) | |
530 | (define-key map "\C-c\C-a\C-b" 'artist-submit-bug-report) | |
531 | map) | |
532 | "Keymap for `artist-minor-mode'.") | |
533 | ||
534 | (defvar artist-replacement-table (make-vector 256 0) | |
535 | "Replacement table for `artist-replace-char'.") | |
536 | ||
537 | ||
538 | ;;; | |
539 | ;;; The table of graphic operations | |
540 | ;;; | |
541 | (defvar artist-mt | |
542 | ;; Implementation note: Maybe this should be done using a structure | |
543 | ;; in the cl package? | |
544 | ;; | |
545 | '( | |
546 | (menu | |
547 | ("Drawing" | |
548 | ((function-call | |
549 | ( "Undo" do-undo undo)) | |
550 | ||
551 | (separator ) | |
552 | (graphics-operation | |
553 | ("Pen" (("Pen" pen-char "pen-c" | |
554 | artist-no-arrows nil | |
555 | nil nil nil | |
556 | artist-do-continously | |
557 | artist-pen | |
558 | (nil)) | |
559 | ("Pen Line" pen-line "pen-l" | |
560 | artist-arrows artist-pen-set-arrow-points | |
561 | artist-pen-reset-last-xy nil nil | |
562 | artist-do-continously | |
563 | artist-pen-line | |
564 | (nil))))) | |
565 | ||
566 | (graphics-operation | |
567 | ("Line" (("line" line "line" | |
568 | artist-arrows artist-set-arrow-points-for-2points | |
569 | nil nil nil | |
570 | 2 | |
571 | artist-draw-line | |
572 | (artist-undraw-line | |
573 | artist-nil nil)) | |
574 | ("straight line" s-line "sline" | |
575 | artist-arrows artist-set-arrow-points-for-2points | |
576 | nil nil nil | |
577 | 2 | |
578 | artist-draw-sline | |
579 | (artist-undraw-sline | |
580 | artist-nil nil))))) | |
581 | ||
582 | (graphics-operation | |
583 | ("Rectangle" (("rectangle" rect "rect" | |
584 | artist-no-arrows nil | |
585 | nil nil nil | |
586 | 2 | |
587 | artist-draw-rect | |
588 | (artist-undraw-rect | |
589 | artist-t-if-fill-char-set artist-fill-rect)) | |
590 | ("square" square "square" | |
591 | artist-no-arrows nil | |
592 | nil nil nil | |
593 | 2 | |
594 | artist-draw-square | |
595 | (artist-undraw-square | |
596 | artist-t-if-fill-char-set artist-fill-square))))) | |
597 | ||
598 | (graphics-operation | |
599 | ("Poly-line" (("poly-line" polyline "poly" | |
600 | artist-arrows artist-set-arrow-points-for-poly | |
601 | nil nil nil | |
602 | artist-do-poly | |
603 | artist-draw-line | |
604 | (artist-undraw-line | |
605 | artist-nil nil)) | |
606 | ("straight poly-line" spolyline "s-poly" | |
607 | artist-arrows artist-set-arrow-points-for-poly | |
608 | nil nil nil | |
609 | artist-do-poly | |
610 | artist-draw-sline | |
611 | (artist-undraw-sline | |
612 | artist-nil nil))))) | |
613 | ||
614 | (graphics-operation | |
615 | ("Ellipse" (("ellipse" ellipse "ellipse" | |
616 | artist-no-arrows nil | |
617 | nil nil nil | |
618 | 2 | |
619 | artist-draw-ellipse | |
620 | (artist-undraw-ellipse | |
621 | artist-t-if-fill-char-set artist-fill-ellipse)) | |
622 | ("circle" circle "circle" | |
623 | artist-no-arrows nil | |
624 | nil nil nil | |
625 | 2 | |
626 | artist-draw-circle | |
627 | (artist-undraw-circle | |
628 | artist-t-if-fill-char-set artist-fill-circle))))) | |
629 | ||
630 | (graphics-operation | |
631 | ("Text" (("text see-thru" text-thru "text-thru" | |
632 | artist-no-arrows nil | |
633 | nil nil nil | |
634 | 1 | |
635 | artist-text-see-thru | |
636 | nil) | |
637 | ("text overwrite" text-ovwrt "text-ovwrt" | |
638 | artist-no-arrows nil | |
639 | nil nil nil | |
640 | 1 | |
641 | artist-text-overwrite | |
642 | nil)))) | |
643 | ||
644 | (graphics-operation | |
645 | ("Spray-can" (("spray-can" spray-can "spray-can" | |
646 | artist-no-arrows nil | |
647 | nil nil nil | |
648 | artist-do-continously | |
649 | artist-spray | |
650 | (artist-spray-get-interval)) | |
651 | ("spray set size" spray-get-size "spray-size" | |
652 | artist-no-arrows nil | |
653 | nil artist-spray-clear-circle artist-spray-set-radius | |
654 | 2 | |
655 | artist-draw-circle | |
656 | (artist-undraw-circle | |
657 | artist-nil nil))))) | |
658 | ||
659 | (graphics-operation | |
660 | ("Erase" (("erase char" erase-char "erase-c" | |
661 | artist-no-arrows nil | |
662 | nil nil nil | |
663 | artist-do-continously | |
664 | artist-erase-char | |
665 | (nil)) | |
666 | ("erase rectangle" erase-rect "erase-r" | |
667 | artist-no-arrows nil | |
668 | nil nil nil | |
669 | 2 | |
670 | artist-draw-rect | |
671 | (artist-undraw-rect | |
672 | artist-t artist-erase-rect))))) | |
673 | ||
674 | (graphics-operation | |
675 | ("Vaporize" (("vaporize line" vaporize-line "vaporize-1" | |
676 | artist-no-arrows nil | |
677 | nil nil nil | |
678 | 1 | |
679 | artist-vaporize-line | |
680 | nil) | |
681 | ("vaporize lines" vaporize-lines "vaporize-n" | |
682 | artist-no-arrows nil | |
683 | nil nil nil | |
684 | 1 | |
685 | artist-vaporize-lines | |
686 | nil))))))) | |
687 | ||
688 | (menu | |
689 | ("Edit" | |
690 | ((graphics-operation | |
691 | ("Cut" (("cut rectangle" cut-r "cut-r" | |
692 | artist-no-arrows nil | |
693 | nil nil nil | |
694 | 2 | |
695 | artist-draw-rect | |
696 | (artist-undraw-rect | |
697 | artist-t artist-cut-rect) | |
698 | ("cut square" cut-s "cut-s" | |
699 | artist-no-arrows nil | |
700 | nil nil nil | |
701 | 2 | |
702 | artist-draw-square | |
703 | (artist-undraw-square | |
704 | artist-t artist-cut-square))))) | |
705 | ||
706 | (graphics-operation | |
707 | ("Copy" (("copy rectangle" copy-r "copy-r" | |
708 | artist-no-arrows nil | |
709 | nil nil nil | |
710 | 2 | |
711 | artist-draw-rect | |
712 | (artist-undraw-rect | |
713 | artist-t artist-copy-rect) | |
714 | ("copy square" copy-s "copy-s" | |
715 | artist-no-arrows nil | |
716 | nil nil nil | |
717 | 2 | |
718 | artist-draw-square | |
719 | (artist-undraw-square | |
720 | artist-t artist-copy-square))))) | |
721 | ||
722 | (graphics-operation | |
723 | ("Paste" (("paste" paste "paste" | |
724 | artist-no-arrows nil | |
725 | nil nil nil | |
726 | 1 | |
727 | artist-paste | |
728 | nil) | |
729 | ("paste" paste "paste" | |
730 | artist-no-arrows nil | |
731 | nil nil nil | |
732 | 1 | |
733 | artist-paste | |
734 | nil)))) | |
735 | ||
736 | (graphics-operation | |
737 | ("Flood-fill" (("flood-fill" flood-fill "flood" | |
738 | artist-no-arrows nil | |
739 | nil nil nil | |
740 | 1 | |
741 | artist-flood-fill | |
742 | nil) | |
743 | ("flood-fill" flood-fill "flood" | |
744 | artist-no-arrows nil | |
745 | nil nil nil | |
746 | 1 | |
747 | artist-flood-fill | |
748 | nil))))))))) | |
749 | ||
750 | (menu | |
751 | ("Settings" | |
752 | ((function-call | |
753 | ("Set Fill" set-fill artist-select-fill-char)) | |
754 | ||
755 | (function-call | |
756 | ("Set Line" set-line artist-select-line-char)) | |
757 | ||
758 | (function-call | |
759 | ("Set Erase" set-erase artist-select-erase-char)) | |
760 | ||
761 | (function-call | |
762 | ("Rubber-banding" rubber-band artist-toggle-rubber-banding)) | |
763 | ||
764 | (function-call | |
765 | ("Trimming" trimming artist-toggle-trim-line-endings)) | |
766 | ||
767 | (function-call | |
768 | ("Borders" borders artist-toggle-borderless-shapes)) | |
769 | ||
770 | (function-call | |
771 | ("Spray-chars" spray-chars artist-select-spray-chars))))) | |
772 | ||
773 | ) ;; end of list | |
774 | ||
775 | "Master Table for `artist-mode'. | |
776 | This table is primarily a table over the different graphics operations | |
777 | available in artist mode, but it also holds layout information for the | |
778 | popup menu. | |
779 | ||
780 | The master table is a list of table elements. The elements of this table | |
781 | have the layout | |
782 | ||
783 | (TAG INFO-PART) | |
784 | ||
785 | There are three kinds of TAG: | |
786 | ||
787 | `menu' -- a sub-menu | |
788 | `separator' -- produce a separator in the popup menu | |
789 | `function-call' -- call a function | |
790 | `graphics-operation' -- a graphics operation | |
791 | ||
792 | The layout of the INFO-PART for `menu' is | |
793 | ||
794 | (TITLE ((TAG-1 INFO-PART-1) (TAG-2 INFO-PART-2) ...)) | |
795 | ||
796 | TITLE is the title of the submenu; this is followed by a list of | |
797 | menu items, each on the general form (TAG INFO-PART). | |
798 | ||
799 | ||
800 | The layout of the INFO-PART for `separator' is empty and not used. | |
801 | ||
802 | ||
803 | This is the layout of the INFO-PART for `function-call': | |
804 | ||
805 | (KEYWORD SYMBOL FN) | |
806 | ||
807 | KEYWORD is a string naming the operation, and appears in the popup menu. | |
808 | SYMBOL is the symbol for the operations. | |
809 | FN is the function performing the operation. This function | |
810 | is called with no arguments. Its return value is ignored. | |
811 | ||
812 | ||
813 | The layout of the INFO-PART for `graphics-operation' is | |
814 | ||
815 | (TITLE (UNSHIFTED SHIFTED)) | |
816 | ||
817 | TITLE is the the title that appears in the popup menu. UNSHIFTED | |
818 | and SHIFTED specify for unshifted and shifted operation. Both | |
819 | have the form | |
820 | ||
821 | (KEYWORD KEY-SYMBOL MODE-LINE ARROW-PRED ARROW-SET-FN | |
822 | INIT-FN PREP-FILL-FN EXIT-FN DRAW-HOW DRAW-FN EXTRA-DRAW-INFO) | |
823 | ||
824 | KEYWORD is a string specifying the name of the shape to draw. | |
825 | This is used when selecting drawing operation. | |
826 | KEY-SYMBOL is the key which is used when looking up members | |
827 | through the functions `artist-go-get-MEMBER-from-symbol' | |
828 | and `artist-fc-get-MEMBER-from-symbol'. | |
829 | MODE-LINE is a string that appears in the mode-line when drawing | |
830 | the shape. | |
831 | ARROW-PRED is a function that is called to find out if the shape | |
832 | can have arrows. The function is called with no arguments and | |
833 | must return nil or t. | |
834 | ARROW-SET-FN is a function that is called to set arrow end-points. | |
835 | Arguments and return values for this funcion are described below. | |
836 | INIT-FN is, if non-nil, a function that is called when the first | |
837 | point of the shape is set. Arguments and return values for | |
838 | this funcion are described below. | |
839 | PREP-FILL-FN is, if non-nil, a function that is called after | |
840 | the last point is set, but before the filling is done. | |
841 | Arguments and return values for this funcion are described below. | |
842 | EXIT-FN is, if non-nil, a function that is called after filling | |
843 | is done. Arguments and return values for this funcion are | |
844 | described below. | |
845 | DRAW-HOW defines the kind of shape. The kinds of shapes are: | |
846 | `artist-do-continously' -- Do drawing operation continously, | |
847 | as long as the mouse button is held down. | |
848 | `artist-do-poly' -- Do drawing operation many times. | |
849 | 1 -- Do drawing operation only once. | |
850 | 2 -- The drawing operation requires two points. | |
851 | DRAW-FN is the function to call for drawing. Arguments and | |
852 | return values for this funcion are described below. | |
853 | EXTRA-DRAW-INFO the layout of this depends on the value of DRAW-HOW: | |
854 | If DRAW-HOW is `artist-do-continously': | |
855 | ||
856 | (INTERVAL-FN) | |
857 | ||
858 | INTERVAL-FN is, if non-nil, a function to call for getting | |
859 | an interval between repeated calls to the DRAW-FN. | |
860 | This function is called with no arguments and must | |
861 | return a number, the interval in seconds. | |
862 | If nil, calls to DRAW-FN are done only when the mouse | |
863 | or cursor is moved. | |
864 | ||
865 | If DRAW-HOW is either `artist-do-poly' or 2: | |
866 | ||
867 | (UNDRAW-FN FILL-PRED FILL-FN) | |
868 | ||
869 | UNDRAW-FN is a function to call for undrawing the shape. | |
870 | Arguments and return values for this funcion are | |
871 | described below. | |
872 | FILL-PRED is a function that is called to find out if the shape | |
873 | can have arrows. The function must take no arguments and | |
874 | return nil or t. | |
875 | FILL-FN is a function to call for filling the shape. | |
876 | Arguments and return values for this funcion are | |
877 | described below. | |
878 | ||
879 | If DRAW-HOW is 1: | |
880 | ||
881 | () | |
882 | ||
883 | Note! All symbols and keywords (both in the `funcion-call' INFO-PART | |
884 | as well as in the `graphics-operation' INFO-PART) must be unique. | |
885 | ||
886 | The following table describe function arguments and return value | |
887 | for different functions and DRAW-HOWs. | |
888 | ||
889 | If DRAW-HOW is either `artist-do-continously' or 1: | |
890 | ||
891 | INIT-FN X Y ==> ignored | |
892 | PREP-FILL-FN X Y ==> ignored | |
893 | EXIT-FN X Y ==> ignored | |
894 | ARROW-SET-FN X Y ==> ignored | |
895 | DRAW-FN X Y ==> ignored | |
896 | ||
897 | If DRAW-HOW is 2: | |
898 | ||
899 | INIT-FN X1 Y1 ==> ignored | |
900 | PREP-FILL-FN X1 Y1 X2 Y2 ==> ignored | |
901 | EXIT-FN X1 Y1 X2 Y2 ==> ignored | |
902 | ARROW-SET-FN X1 Y1 X2 Y2 ==> ignored | |
903 | DRAW-FN X1 Y1 X2 Y2 ==> (ENDPOINT-1 ENDPOINT-2 SHAPE) | |
904 | UNDRAW-FN (ENDPOINT-1 ENDPOINT-2 SHAPE) ==> ignored | |
905 | FILL-FN (ENDPOINT-1 ENDPOINT-2 SHAPE) X1 Y1 X2 Y2 ==> ignored | |
906 | ||
907 | ENDPOINT-1 and ENDPOINT-2 are endpoints which are created with | |
908 | `artist-make-endpoint' | |
909 | SHAPE is an opaque structure, created by the DRAW-FN and intented | |
910 | to be used only by the UNDRAW-FN. | |
911 | ||
912 | If DRAW-HOW is `artist-do-poly': | |
913 | ||
914 | INIT-FN X1 Y1 | |
915 | PREP-FILL-FN POINT-LIST | |
916 | ARROW-SET-FN POINT-LIST | |
917 | EXIT-FN POINT-LIST | |
918 | DRAW-FN X-LAST Y-LAST X-NEW Y-NEW ==> (ENDPOINT-1 ENDPOINT-2 SHAPE) | |
919 | UNDRAW-FN (ENDPOINT-1 ENDPOINT-2 SHAPE) | |
920 | FILL-FN POINT-LIST | |
921 | ||
922 | ENDPOINT-1 and ENDPOINT-2 are endpoints which are created with | |
923 | `artist-make-endpoint'. | |
924 | SHAPE is an opaque structure, created by the DRAW-FN and intented | |
925 | to be used only by the UNDRAW-FN. | |
926 | POINT-LIST is a list of vectors [X Y].") | |
927 | ||
928 | ||
929 | ;; | |
930 | ;; Accessors for the master table | |
931 | ;; | |
932 | ||
933 | (defun artist-mt-get-tag (element) | |
934 | "Retrieve the tag component from the master table ELEMENT." | |
935 | (elt element 0)) | |
936 | ||
937 | (defun artist-mt-get-info-part (element) | |
938 | "Retrieve the info part component from the master table ELEMENT." | |
939 | (elt element 1)) | |
940 | ||
941 | ;; For the 'graphics-operation info-parts | |
942 | ;; | |
943 | (defsubst artist-go-get-desc (info-part) | |
944 | "Retrieve the description component from a graphics operation INFO-PART." | |
945 | (elt info-part 0)) | |
946 | ||
947 | (defsubst artist-go-get-unshifted (info-part) | |
948 | "Retrieve the unshifted info from a graphics operation INFO-PART." | |
949 | (elt (elt info-part 1) 0)) | |
950 | ||
951 | (defsubst artist-go-get-shifted (info-part) | |
952 | "Retrieve the shifted info from a graphics operation INFO-PART." | |
953 | (elt (elt info-part 1) 1)) | |
954 | ||
955 | (defsubst artist-go-get-keyword (info-variant-part) | |
956 | "Retrieve the keyword component from an INFO-VARIANT-PART. | |
957 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
958 | (elt info-variant-part 0)) | |
959 | ||
960 | (defsubst artist-go-get-symbol (info-variant-part) | |
961 | "Retrieve the symbol component from an INFO-VARIANT-PART. | |
962 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
963 | (elt info-variant-part 1)) | |
964 | ||
965 | (defsubst artist-go-get-mode-line (info-variant-part) | |
966 | "Retrieve the mode line component from an INFO-VARIANT-PART. | |
967 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
968 | (elt info-variant-part 2)) | |
969 | ||
970 | (defsubst artist-go-get-arrow-pred (info-variant-part) | |
971 | "Retrieve the arrow predicate component from an INFO-VARIANT-PART. | |
972 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
973 | (elt info-variant-part 3)) | |
974 | ||
975 | (defsubst artist-go-get-arrow-set-fn (info-variant-part) | |
976 | "Retrieve the arrow set component from an INFO-VARIANT-PART. | |
977 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
978 | (elt info-variant-part 4)) | |
979 | ||
980 | (defsubst artist-go-get-init-fn (info-variant-part) | |
981 | "Retrieve the init function component from an INFO-VARIANT-PART. | |
982 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
983 | (elt info-variant-part 5)) | |
984 | ||
985 | (defsubst artist-go-get-prep-fill-fn (info-variant-part) | |
986 | "Retrieve the fill preparation function component from an INFO-VARIANT-PART. | |
987 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
988 | (elt info-variant-part 6)) | |
989 | ||
990 | (defsubst artist-go-get-exit-fn (info-variant-part) | |
991 | "Retrieve the exit component from an INFO-VARIANT-PART. | |
992 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
993 | (elt info-variant-part 7)) | |
994 | ||
995 | (defsubst artist-go-get-draw-how (info-variant-part) | |
996 | "Retrieve the draw how component from an INFO-VARIANT-PART. | |
997 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
998 | (elt info-variant-part 8)) | |
999 | ||
1000 | (defsubst artist-go-get-draw-fn (info-variant-part) | |
1001 | "Retrieve the draw function component from an INFO-VARIANT-PART. | |
1002 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part." | |
1003 | (elt info-variant-part 9)) | |
1004 | ||
1005 | (defsubst artist-go-get-undraw-fn (info-variant-part) | |
1006 | "Retrieve the undraw function component from an INFO-VARIANT-PART. | |
1007 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part. | |
1008 | This interval function component is available only if the `draw-how' | |
1009 | component is other than `artist-do-continously' or 1." | |
1010 | (elt (elt info-variant-part 10) 0)) | |
1011 | ||
1012 | (defsubst artist-go-get-interval-fn (info-variant-part) | |
1013 | "Retrieve the interval function component from an INFO-VARIANT-PART. | |
1014 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part. | |
1015 | This interval function component is available only if the `draw-how' | |
1016 | component is `artist-do-continously'." | |
1017 | (elt (elt info-variant-part 10) 0)) | |
1018 | ||
1019 | (defsubst artist-go-get-fill-pred (info-variant-part) | |
1020 | "Retrieve the fill predicate component from an INFO-VARIANT-PART. | |
1021 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part. | |
1022 | This interval function component is available only if the `draw-how' | |
1023 | component is other than `artist-do-continously' or 1." | |
1024 | (elt (elt info-variant-part 10) 1)) | |
1025 | ||
1026 | (defsubst artist-go-get-fill-fn (info-variant-part) | |
1027 | "Retrieve the fill function component from an INFO-VARIANT-PART. | |
1028 | An INFO-VARIANT-PART is the shifted or unshifted info from a info-part. | |
1029 | This interval function component is available only if the `draw-how' | |
1030 | component is other than `artist-do-continously' or 1." | |
1031 | (elt (elt info-variant-part 10) 2)) | |
1032 | ||
1033 | ;; For the 'function-call info-parts | |
1034 | ;; | |
1035 | (defsubst artist-fc-get-keyword (info-part) | |
1036 | "Retrieve the keyword component from a graphics operation INFO-PART." | |
1037 | (elt info-part 0)) | |
1038 | ||
1039 | (defsubst artist-fc-get-symbol (info-part) | |
1040 | "Retrieve the symbol component from a graphics operation INFO-PART." | |
1041 | (elt info-part 1)) | |
1042 | ||
1043 | (defsubst artist-fc-get-fn (info-part) | |
1044 | "Retrieve the function component from a graphics operation INFO-PART." | |
1045 | (elt info-part 2)) | |
1046 | ||
1047 | ;; For the 'menu info-parts | |
1048 | ;; | |
1049 | (defsubst artist-mn-get-title (info-part) | |
1050 | "Retrieve the title component from a graphics operation INFO-PART." | |
1051 | (elt info-part 0)) | |
1052 | ||
1053 | (defsubst artist-mn-get-items (info-part) | |
1054 | "Retrieve the items component from a graphics operation INFO-PART." | |
1055 | (elt info-part 1)) | |
1056 | ||
1057 | ;;; --------------------------------- | |
1058 | ;;; The artist-mode | |
1059 | ;;; --------------------------------- | |
1060 | ||
fb39bbbd | 1061 | ;;;###autoload |
b95b34e5 GM |
1062 | (defun artist-mode (&optional state) |
1063 | "Toggle artist mode. With arg, turn artist mode on if arg is positive. | |
1064 | Artist lets you draw lines, squares, rectangles and poly-lines, ellipses | |
1065 | and circles with your mouse and/or keyboard. | |
1066 | ||
1067 | How to quit artist mode | |
1068 | ||
1069 | Type \\[artist-mode-off] to quit artist-mode. | |
1070 | ||
1071 | ||
1072 | How to submit a bug report | |
1073 | ||
1074 | Type \\[artist-submit-bug-report] to submit a bug report. | |
1075 | ||
1076 | ||
1077 | Drawing with the mouse: | |
1078 | ||
1079 | mouse-2 | |
1080 | shift mouse-2 Pops up a menu where you can select what to draw with | |
1081 | mouse-1, and where you can do some settings (described | |
1082 | below). | |
1083 | ||
1084 | mouse-1 | |
1085 | shift mouse-1 Draws lines, rectangles or poly-lines, erases, cuts, copies | |
1086 | or pastes: | |
1087 | ||
1088 | Operation Not shifted Shifted | |
1089 | -------------------------------------------------------------- | |
1090 | Pen fill-char at point line from last point | |
1091 | to new point | |
1092 | -------------------------------------------------------------- | |
1093 | Line Line in any direction Straight line | |
1094 | -------------------------------------------------------------- | |
1095 | Rectangle Rectangle Square | |
1096 | -------------------------------------------------------------- | |
1097 | Poly-line Poly-line in any dir Straight poly-lines | |
1098 | -------------------------------------------------------------- | |
1099 | Ellipses Ellipses Circles | |
1100 | -------------------------------------------------------------- | |
1101 | Text Text (see thru) Text (overwrite) | |
1102 | -------------------------------------------------------------- | |
1103 | Spray-can Spray-can Set size for spray | |
1104 | -------------------------------------------------------------- | |
1105 | Erase Erase character Erase rectangle | |
1106 | -------------------------------------------------------------- | |
1107 | Vaporize Erase single line Erase connected | |
1108 | lines | |
1109 | -------------------------------------------------------------- | |
1110 | Cut Cut rectangle Cut square | |
1111 | -------------------------------------------------------------- | |
1112 | Copy Copy rectangle Copy square | |
1113 | -------------------------------------------------------------- | |
1114 | Paste Paste Paste | |
1115 | -------------------------------------------------------------- | |
1116 | Flood-fill Flood-fill Flood-fill | |
1117 | -------------------------------------------------------------- | |
1118 | ||
1119 | * Straight lines can only go horiziontally, vertically | |
1120 | or diagonally. | |
1121 | ||
1122 | * Poly-lines are drawn while holding mouse-1 down. When you | |
1123 | release the button, the point is set. If you want a segment | |
1124 | to be straight, hold down shift before pressing the | |
1125 | mouse-1 button. Click mouse-2 or mouse-3 to stop drawing | |
1126 | poly-lines. | |
1127 | ||
1128 | * See thru for text means that text already in the buffer | |
1129 | will be visible through blanks in the text rendered, while | |
1130 | overwrite means the opposite. | |
1131 | ||
1132 | * Vaporizing connected lines only vaporizes lines whose | |
1133 | _endpoints_ are connected. See also the variable | |
1134 | `artist-vaporize-fuzziness'. | |
1135 | ||
1136 | * Cut copies, then clears the rectangle/square. | |
1137 | ||
1138 | * When drawing lines or poly-lines, you can set arrows. | |
1139 | See below under ``Arrows'' for more info. | |
1140 | ||
1141 | * The mode line shows the currently selected drawing operation. | |
1142 | In addition, if it has an asterisk (*) at the end, you | |
1143 | are currently drawing something. | |
1144 | ||
1145 | * Be patient when flood-filling -- large areas take quite | |
1146 | some time to fill. | |
1147 | ||
1148 | ||
1149 | mouse-3 Erases character under pointer | |
1150 | shift mouse-3 Erases rectangle | |
1151 | ||
1152 | ||
1153 | Settings | |
1154 | ||
1155 | Set fill Sets the character used when filling rectangles/squares | |
1156 | ||
1157 | Set line Sets the character used when drawing lines | |
1158 | ||
1159 | Erase char Sets the character used when erasing | |
1160 | ||
1161 | Rubber-banding Toggles rubber-banding | |
1162 | ||
1163 | Trimming Toggles trimming of line-endings (that is: when the shape | |
1164 | is drawn, extraneous white-space at end of lines is removed) | |
1165 | ||
1166 | Borders Toggles the drawing of line borders around filled shapes. | |
1167 | ||
1168 | ||
1169 | Drawing with keys | |
1170 | ||
1171 | \\[artist-key-set-point] Does one of the following: | |
1172 | For lines/rectangles/squares: sets the first/second endpoint | |
1173 | For poly-lines: sets a point (use C-u \\[artist-key-set-point] to set last point) | |
1174 | When erase characters: toggles erasing | |
1175 | When cutting/copying: Sets first/last endpoint of rect/square | |
1176 | When pasting: Pastes | |
1177 | ||
1178 | \\[artist-select-operation] Selects what to draw | |
1179 | ||
1180 | Move around with \\[artist-next-line], \\[artist-previous-line], \\[artist-forward-char] and \\[artist-backward-char]. | |
1181 | ||
1182 | \\[artist-select-fill-char] Sets the charater to use when filling | |
1183 | \\[artist-select-line-char] Sets the charater to use when drawing | |
1184 | \\[artist-select-erase-char] Sets the charater to use when erasing | |
1185 | \\[artist-toggle-rubber-banding] Toggles rubber-banding | |
1186 | \\[artist-toggle-trim-line-endings] Toggles trimming of line-endings | |
1187 | \\[artist-toggle-borderless-shapes] Toggles borders on drawn shapes | |
1188 | ||
1189 | ||
1190 | Arrows | |
1191 | ||
1192 | \\[artist-toggle-first-arrow] Sets/unsets an arrow at the beginning | |
1193 | of the line/poly-line | |
1194 | ||
1195 | \\[artist-toggle-second-arrow] Sets/unsets an arrow at the end | |
1196 | of the line/poly-line | |
1197 | ||
1198 | ||
1199 | Selecting operation | |
1200 | ||
1201 | There are some keys for quickly selecting drawing operations: | |
1202 | ||
1203 | \\[artist-select-op-line] Selects drawing lines | |
1204 | \\[artist-select-op-straight-line] Selects drawing straight lines | |
1205 | \\[artist-select-op-rectangle] Selects drawing rectangles | |
1206 | \\[artist-select-op-square] Selects drawing squares | |
1207 | \\[artist-select-op-poly-line] Selects drawing poly-lines | |
1208 | \\[artist-select-op-straight-poly-line] Selects drawing straight poly-lines | |
1209 | \\[artist-select-op-ellipse] Selects drawing ellipses | |
1210 | \\[artist-select-op-circle] Selects drawing circles | |
1211 | \\[artist-select-op-text-see-thru] Selects rendering text (see thru) | |
1212 | \\[artist-select-op-text-overwrite] Selects rendering text (overwrite) | |
1213 | \\[artist-select-op-spray-can] Spray with spray-can | |
1214 | \\[artist-select-op-spray-set-size] Set size for the spray-can | |
1215 | \\[artist-select-op-erase-char] Selects erasing characters | |
1216 | \\[artist-select-op-erase-rectangle] Selects erasing rectangles | |
1217 | \\[artist-select-op-vaporize-line] Selects vaporizing single lines | |
1218 | \\[artist-select-op-vaporize-lines] Selects vaporizing connected lines | |
1219 | \\[artist-select-op-cut-rectangle] Selects cutting rectangles | |
1220 | \\[artist-select-op-copy-rectangle] Selects copying rectangles | |
1221 | \\[artist-select-op-paste] Selects pasting | |
1222 | \\[artist-select-op-flood-fill] Selects flood-filling | |
1223 | ||
1224 | ||
1225 | Variables | |
1226 | ||
1227 | This is a brief overview of the different varaibles. For more info, | |
1228 | see the documentation for the variables (type \\[describe-variable] <variable> RET). | |
1229 | ||
1230 | artist-rubber-banding Interactively do rubber-banding or not | |
1231 | artist-first-char What to set at first/second point... | |
1232 | artist-second-char ...when not rubber-banding | |
1233 | artist-interface-with-rect If cut/copy/paste should interface with rect | |
1234 | artist-arrows The arrows to use when drawing arrows | |
1235 | artist-aspect-ratio Character height-to-width for squares | |
1236 | artist-trim-line-endings Trimming of line endings | |
1237 | artist-flood-fill-right-border Right border when flood-filling | |
1238 | artist-flood-fill-show-incrementally Update display while filling | |
1239 | artist-pointer-shape Pointer shape to use while drawing | |
1240 | artist-ellipse-left-char Character to use for narrow ellipses | |
1241 | artist-ellipse-right-char Character to use for narrow ellipses | |
1242 | artist-borderless-shapes If shapes should have borders | |
1243 | artist-picture-compatibility Whether or not to be picture mode compatible | |
1244 | artist-vaporize-fuzziness Tolerance when recognizing lines | |
1245 | artist-spray-interval Seconds between repeated sprayings | |
1246 | artist-spray-radius Size of the spray-area | |
1247 | artist-spray-chars The spray-``color'' | |
1248 | artist-spray-new-chars Initial spray-``color'' | |
1249 | ||
1250 | Hooks | |
1251 | ||
1252 | When entering artist-mode, the hook `artist-mode-init-hook' is called. | |
1253 | When quitting artist-mode, the hook `artist-mode-exit-hook' is called. | |
1254 | ||
1255 | ||
1256 | Keymap summary | |
1257 | ||
1258 | \\{artist-mode-map}" | |
1259 | (interactive) | |
1260 | (if (setq artist-mode | |
1261 | (if (null state) (not artist-mode) | |
1262 | (> (prefix-numeric-value state) 0))) | |
1263 | (artist-mode-init) | |
1264 | (artist-mode-exit))) | |
1265 | ||
1266 | ;; insert our minor mode string | |
1267 | (or (assq 'artist-mode minor-mode-alist) | |
1268 | (setq minor-mode-alist | |
1269 | (cons '(artist-mode artist-mode-name) | |
1270 | minor-mode-alist))) | |
1271 | ||
1272 | ;; insert our minor mode keymap | |
1273 | (or (assq 'artist-mode minor-mode-map-alist) | |
1274 | (setq minor-mode-map-alist | |
1275 | (cons (cons 'artist-mode artist-mode-map) | |
1276 | minor-mode-map-alist))) | |
1277 | ||
1278 | ||
1279 | ||
1280 | (eval-when-compile | |
1281 | ;; Variables that are made local in artist-mode-init | |
1282 | (defvar artist-key-is-drawing nil) | |
1283 | (defvar artist-key-endpoint1 nil) | |
1284 | (defvar artist-key-poly-point-list nil) | |
1285 | (defvar artist-key-shape nil) | |
1286 | (defvar artist-key-draw-how nil) | |
1287 | (defvar artist-popup-menu-table nil) | |
1288 | (defvar artist-key-compl-table nil) | |
1289 | (defvar artist-rb-save-data nil) | |
1290 | (defvar artist-arrow-point-1 nil) | |
1291 | (defvar artist-arrow-point-2 nil)) | |
1292 | ||
1293 | ||
1294 | ;; Init and exit | |
1295 | (defun artist-mode-init () | |
1296 | "Init Artist mode. This will call the hook `artist-mode-init-hook'." | |
1297 | (let ((i 0)) | |
1298 | (while (< i 256) | |
1299 | (aset artist-replacement-table i i) | |
1300 | (setq i (1+ i)))) | |
1301 | (aset artist-replacement-table ?\n ?\ ) | |
1302 | (aset artist-replacement-table ?\t ?\ ) | |
1303 | (aset artist-replacement-table 0 ?\ ) | |
1304 | (make-local-variable 'artist-key-is-drawing) | |
1305 | (make-local-variable 'artist-key-endpoint1) | |
1306 | (make-local-variable 'artist-key-poly-point-list) | |
1307 | (make-local-variable 'artist-key-shape) | |
1308 | (make-local-variable 'artist-key-draw-how) | |
1309 | (make-local-variable 'artist-popup-menu-table) | |
1310 | (make-local-variable 'artist-key-compl-table) | |
1311 | (make-local-variable 'artist-rb-save-data) | |
1312 | (make-local-variable 'artist-arrow-point-1) | |
1313 | (make-local-variable 'artist-arrow-point-2) | |
1314 | (setq artist-key-is-drawing nil) | |
1315 | (setq artist-key-endpoint1 nil) | |
1316 | (setq artist-key-poly-point-list nil) | |
1317 | (setq artist-key-shape nil) | |
1318 | (setq artist-popup-menu-table (artist-compute-popup-menu-table artist-mt)) | |
1319 | (setq artist-key-compl-table (artist-compute-key-compl-table artist-mt)) | |
1320 | (setq artist-rb-save-data (make-vector 7 0)) | |
1321 | (setq artist-arrow-point-1 nil) | |
1322 | (setq artist-arrow-point-2 nil) | |
1323 | (make-local-variable 'next-line-add-newlines) | |
1324 | (setq next-line-add-newlines t) | |
1325 | (setq artist-key-draw-how | |
1326 | (artist-go-get-draw-how-from-symbol artist-curr-go)) | |
1327 | (if (and artist-picture-compatibility (not (eq major-mode 'picture-mode))) | |
1328 | (progn | |
1329 | (picture-mode) | |
1330 | (message ""))) | |
1331 | (run-hooks 'artist-mode-init-hook) | |
1332 | (artist-mode-line-show-curr-operation artist-key-is-drawing)) | |
1333 | ||
1334 | (defun artist-mode-exit () | |
1335 | "Exit Artist mode. This will call the hook `artist-mode-exit-hook'." | |
1336 | (if (and artist-picture-compatibility (eq major-mode 'picture-mode)) | |
1337 | (picture-mode-exit)) | |
1338 | (kill-local-variable 'next-line-add-newlines) | |
1339 | (run-hooks 'artist-mode-exit-hook)) | |
1340 | ||
1341 | (defun artist-mode-off () | |
1342 | "Turn Artist mode off." | |
1343 | (interactive) | |
1344 | (artist-mode -1) | |
1345 | (force-mode-line-update)) | |
1346 | ||
1347 | ;; | |
1348 | ;; General routines | |
1349 | ;; | |
1350 | ||
1351 | (defun artist-update-display () | |
1352 | "Repaint the display." | |
1353 | (sit-for 0)) | |
1354 | ||
1355 | (defun artist-mode-line-show-curr-operation (is-drawing) | |
1356 | "Show current operation in mode-line. If IS-DRAWING, show that." | |
1357 | (let ((mtext (concat artist-mode-name "/" | |
1358 | (artist-go-get-mode-line-from-symbol artist-curr-go) | |
1359 | (if is-drawing "/*" "")))) | |
1360 | (setcdr (assq 'artist-mode minor-mode-alist) (list mtext))) | |
1361 | (force-mode-line-update)) | |
1362 | ||
1363 | ||
1364 | (defun artist-t-if-fill-char-set () | |
1365 | "Return the value of the variable `artist-fill-char-set'." | |
1366 | artist-fill-char-set) | |
1367 | ||
1368 | (defun artist-t () | |
1369 | "Always return t." | |
1370 | t) | |
1371 | ||
1372 | (defun artist-nil () | |
1373 | "Always return nil." | |
1374 | nil) | |
1375 | ||
1376 | (defun artist-arrows () | |
1377 | "Say yes to arrows!" | |
1378 | t) | |
1379 | ||
1380 | (defun artist-no-arrows () | |
1381 | "Say no to arrows!" | |
1382 | nil) | |
1383 | ||
1384 | ;; | |
1385 | ;; Auxiliary init-routines | |
1386 | ;; | |
1387 | ||
1388 | ; | |
1389 | ; Computing the table for the x-popup-menu from the master table | |
1390 | ; | |
1391 | ||
1392 | (defun artist-compute-popup-menu-table (menu-table) | |
1393 | "Create a menu from from MENU-TABLE data. | |
1394 | The returned value is suitable for the `x-popup-menu' function." | |
1395 | (cons "Artist menu" | |
1396 | (artist-compute-popup-menu-table-sub menu-table))) | |
1397 | ||
1398 | (defun artist-compute-popup-menu-table-sub (menu-table) | |
1399 | "Compute operation table suitable for `x-popup-menu' from MENU-TABLE." | |
1400 | (mapcar | |
1401 | (lambda (element) | |
1402 | (let ((element-tag (artist-mt-get-tag element))) | |
1403 | (cond ((eq element-tag 'graphics-operation) | |
1404 | (let* ((info-part (artist-mt-get-info-part element)) | |
1405 | (descr (artist-go-get-desc info-part)) | |
1406 | (unshifted (artist-go-get-unshifted info-part)) | |
1407 | (symbol (artist-go-get-symbol unshifted))) | |
1408 | (list descr symbol))) | |
1409 | ||
1410 | ((eq element-tag 'function-call) | |
1411 | (let* ((info-part (artist-mt-get-info-part element)) | |
1412 | (keyword (artist-fc-get-keyword info-part)) | |
1413 | (symbol (artist-fc-get-symbol info-part))) | |
1414 | (list keyword symbol))) | |
1415 | ||
1416 | ((eq element-tag 'separator) | |
1417 | '("" "")) | |
1418 | ||
1419 | ((eq element-tag 'menu) | |
1420 | (let* ((info-part (artist-mt-get-info-part element)) | |
1421 | (title (artist-mn-get-title info-part)) | |
1422 | (items (artist-mn-get-items info-part))) | |
1423 | (cons title (artist-compute-popup-menu-table-sub items)))) | |
1424 | ||
1425 | (t | |
1426 | (error "Internal error: unknown element-tag: \"%s\"" | |
1427 | element-tag))))) | |
1428 | menu-table)) | |
1429 | ||
1430 | ; | |
1431 | ; Computing the completion table from the master table | |
1432 | ; | |
1433 | ||
1434 | (defun artist-compute-key-compl-table (menu-table) | |
1435 | "Compute completion table from MENU-TABLE, suitable for `completing-read'." | |
1436 | (apply | |
1437 | 'nconc | |
1438 | (artist-remove-nulls | |
1439 | (mapcar | |
1440 | (lambda (element) | |
1441 | (let ((element-tag (artist-mt-get-tag element))) | |
1442 | (cond ((eq element-tag 'graphics-operation) | |
1443 | (let* ((info-part (artist-mt-get-info-part element)) | |
1444 | (unshifted (artist-go-get-unshifted info-part)) | |
1445 | (shifted (artist-go-get-shifted info-part)) | |
1446 | (unshifted-kwd (artist-go-get-keyword unshifted)) | |
1447 | (shifted-kwd (artist-go-get-keyword shifted))) | |
1448 | (list (list unshifted-kwd) (list shifted-kwd)))) | |
1449 | ((eq element-tag 'menu) | |
1450 | (let* ((info-part (artist-mt-get-info-part element)) | |
1451 | (items (artist-mn-get-items info-part))) | |
1452 | (artist-compute-key-compl-table items))) | |
1453 | (t | |
1454 | nil)))) | |
1455 | menu-table)))) | |
1456 | ||
1457 | ||
1458 | ; | |
1459 | ; Retrieving a symbol (graphics operation or function-call) from a keyword | |
1460 | ; | |
1461 | ||
1462 | (defun artist-mt-get-symbol-from-keyword (kwd) | |
1463 | "Search master table for keyword KWD and return its symbol." | |
1464 | (artist-mt-get-symbol-from-keyword-sub artist-mt kwd)) | |
1465 | ||
1466 | (defun artist-mt-get-symbol-from-keyword-sub (table kwd) | |
1467 | "Search TABLE for keyword KWD and return its symbol." | |
1468 | (catch 'found | |
1469 | (mapcar | |
1470 | (lambda (element) | |
1471 | (let ((element-tag (artist-mt-get-tag element))) | |
1472 | (cond ((eq element-tag 'graphics-operation) | |
1473 | (let* ((info-part (artist-mt-get-info-part element)) | |
1474 | (unshifted (artist-go-get-unshifted info-part)) | |
1475 | (shifted (artist-go-get-shifted info-part)) | |
1476 | (unshifted-kwd (artist-go-get-keyword unshifted)) | |
1477 | (shifted-kwd (artist-go-get-keyword shifted)) | |
1478 | (unshifted-sym (artist-go-get-symbol unshifted)) | |
1479 | (shifted-sym (artist-go-get-symbol shifted))) | |
1480 | (if (string-equal kwd unshifted-kwd) | |
1481 | (throw 'found unshifted-sym)) | |
1482 | (if (string-equal kwd shifted-kwd) | |
1483 | (throw 'found shifted-sym)))) | |
1484 | ||
1485 | ((eq element-tag 'function-call) | |
1486 | (let* ((info-part (artist-mt-get-info-part element)) | |
1487 | (keyword (artist-fc-get-keyword info-part)) | |
1488 | (symbol (artist-fc-get-symbol info-part))) | |
1489 | (if (string-equal kwd keyword) | |
1490 | (throw 'found symbol)))) | |
1491 | ((eq element-tag 'menu) | |
1492 | (let* ((info-part (artist-mt-get-info-part element)) | |
1493 | (items (artist-mn-get-items info-part)) | |
1494 | (answer (artist-mt-get-symbol-from-keyword-sub | |
1495 | items kwd))) | |
1496 | (if answer (throw 'found answer)))) | |
1497 | (t | |
1498 | nil)))) | |
1499 | table) | |
1500 | nil)) | |
1501 | ||
1502 | ||
1503 | ; | |
1504 | ; Retrieving info from a graphics operation symbol | |
1505 | ; | |
1506 | ||
1507 | (defun artist-go-retrieve-from-symbol (symbol retrieve-fn) | |
1508 | "Search the master table for a graphics operation SYMBOL. | |
1509 | Calls RETRIEVE-FN to retrieve information from that symbol's | |
1510 | info-variant-part." | |
1511 | (artist-go-retrieve-from-symbol-sub artist-mt symbol retrieve-fn)) | |
1512 | ||
1513 | (defun artist-go-retrieve-from-symbol-sub (table symbol retrieve-fn) | |
1514 | "Search the TABLE for a graphics operation SYMBOL. | |
1515 | Calls RETRIEVE-FN to retrieve information from that symbol's | |
1516 | info-variant-part." | |
1517 | (catch 'found | |
1518 | (mapcar | |
1519 | (lambda (element) | |
1520 | (let ((element-tag (artist-mt-get-tag element))) | |
1521 | (cond ((eq element-tag 'graphics-operation) | |
1522 | (let* ((info-part (artist-mt-get-info-part element)) | |
1523 | (unshifted (artist-go-get-unshifted info-part)) | |
1524 | (shifted (artist-go-get-shifted info-part)) | |
1525 | (unshifted-sym (artist-go-get-symbol unshifted)) | |
1526 | (shifted-sym (artist-go-get-symbol shifted)) | |
1527 | (variant-part (cond | |
1528 | ((eq unshifted-sym symbol) unshifted) | |
1529 | ((eq shifted-sym symbol) shifted) | |
1530 | (t nil)))) | |
1531 | (if variant-part ; if found do: | |
1532 | (throw 'found (funcall retrieve-fn variant-part))))) | |
1533 | ||
1534 | ((eq element-tag 'menu) | |
1535 | (let* ((info-part (artist-mt-get-info-part element)) | |
1536 | (items (artist-mn-get-items info-part)) | |
1537 | (answer (artist-go-retrieve-from-symbol-sub | |
1538 | items symbol retrieve-fn))) | |
1539 | (if answer (throw 'found answer))))))) | |
1540 | ||
1541 | table) | |
1542 | nil)) | |
1543 | ||
1544 | (defun artist-go-get-keyword-from-symbol (symbol) | |
1545 | "Search the master table, get keyword from a graphics operation SYMBOL." | |
1546 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-keyword)) | |
1547 | ||
1548 | (defun artist-go-get-mode-line-from-symbol (symbol) | |
1549 | "Search the master table, get mode-line from a graphics operation SYMBOL." | |
1550 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-mode-line)) | |
1551 | ||
1552 | (defun artist-go-get-arrow-pred-from-symbol (symbol) | |
1553 | "Search the master table, get arrow-pred from a graphics operation SYMBOL." | |
1554 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-arrow-pred)) | |
1555 | ||
1556 | (defun artist-go-get-arrow-set-fn-from-symbol (symbol) | |
1557 | "Search the master table, get arrow-set-fn from a graphics operation SYMBOL." | |
1558 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-arrow-set-fn)) | |
1559 | ||
1560 | (defun artist-go-get-init-fn-from-symbol (symbol) | |
1561 | "Search the master table, get init-fn from a graphics operation SYMBOL." | |
1562 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-init-fn)) | |
1563 | ||
1564 | (defun artist-go-get-prep-fill-fn-from-symbol (symbol) | |
1565 | "Search the master table, get prep-fill-fn from a graphics operation SYMBOL." | |
1566 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-prep-fill-fn)) | |
1567 | ||
1568 | (defun artist-go-get-exit-fn-from-symbol (symbol) | |
1569 | "Search the master table, get exit-fn from a graphics operation SYMBOL." | |
1570 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-exit-fn)) | |
1571 | ||
1572 | (defun artist-go-get-draw-fn-from-symbol (symbol) | |
1573 | "Search the master table, get draw-fn from a graphics operation SYMBOL." | |
1574 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-draw-fn)) | |
1575 | ||
1576 | (defun artist-go-get-draw-how-from-symbol (symbol) | |
1577 | "Search the master table, get draw-how from a graphics operation SYMBOL." | |
1578 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-draw-how)) | |
1579 | ||
1580 | (defun artist-go-get-undraw-fn-from-symbol (symbol) | |
1581 | "Search the master table, get undraw-fn from a graphics operation SYMBOL." | |
1582 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-undraw-fn)) | |
1583 | ||
1584 | (defun artist-go-get-interval-fn-from-symbol (symbol) | |
1585 | "Search the master table, get interval-fn from a graphics operation SYMBOL." | |
1586 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-interval-fn)) | |
1587 | ||
1588 | (defun artist-go-get-fill-pred-from-symbol (symbol) | |
1589 | "Search the master table, get fill-pred from a graphics operation SYMBOL." | |
1590 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-fill-pred)) | |
1591 | ||
1592 | (defun artist-go-get-fill-fn-from-symbol (symbol) | |
1593 | "Search the master table, get fill-fn from a graphics operation SYMBOL." | |
1594 | (artist-go-retrieve-from-symbol symbol 'artist-go-get-fill-fn)) | |
1595 | ||
1596 | (defun artist-go-get-symbol-shift (symbol is-shifted) | |
1597 | "Search for (shifted or unshifted) graphics operation SYMBOL. | |
1598 | If IS-SHIFTED is non-nil, return the shifted symbol, | |
1599 | otherwise the shifted symbol." | |
1600 | (artist-go-get-symbol-shift-sub artist-mt symbol is-shifted)) | |
1601 | ||
1602 | (defun artist-go-get-symbol-shift-sub (table symbol is-shifted) | |
1603 | "Search TABLE for (shifted or unshifted) graphics SYMBOL. | |
1604 | If IS-SHIFTED is non-nil, return the shifted symbol, | |
1605 | otherwise the shifted symbol." | |
1606 | (catch 'found | |
1607 | (mapcar | |
1608 | (lambda (element) | |
1609 | (let ((element-tag (artist-mt-get-tag element))) | |
1610 | (cond ((eq element-tag 'graphics-operation) | |
1611 | (let* ((info-part (artist-mt-get-info-part element)) | |
1612 | (unshift-variant (artist-go-get-unshifted info-part)) | |
1613 | (shift-variant (artist-go-get-shifted info-part)) | |
1614 | (unshift-sym (artist-go-get-symbol unshift-variant)) | |
1615 | (shift-sym (artist-go-get-symbol shift-variant))) | |
1616 | (if (or (eq symbol unshift-sym) (eq symbol shift-sym)) | |
1617 | (throw 'found (if is-shifted shift-sym unshift-sym))))) | |
1618 | ||
1619 | ((eq element-tag 'menu) | |
1620 | (let* ((info-part (artist-mt-get-info-part element)) | |
1621 | (items (artist-mn-get-items info-part)) | |
1622 | (answer (artist-go-get-symbol-shift-sub | |
1623 | items symbol is-shifted))) | |
1624 | (if answer (throw 'found answer))))))) | |
1625 | ||
1626 | table) | |
1627 | nil)) | |
1628 | ||
1629 | ; | |
1630 | ; Retrieving info from a function-call symbol | |
1631 | ; | |
1632 | ||
1633 | (defun artist-fc-retrieve-from-symbol (symbol retrieve-fn) | |
1634 | "Search the master table for a function call SYMBOL. | |
1635 | Calls RETRIEVE-FN to retrieve information from that symbol's | |
1636 | info-variant-part." | |
1637 | (artist-fc-retrieve-from-symbol-sub artist-mt symbol retrieve-fn)) | |
1638 | ||
1639 | (defun artist-fc-retrieve-from-symbol-sub (table symbol retrieve-fn) | |
1640 | "Search TABLE for a function-call SYMBOL. | |
1641 | Calls RETRIEVE-FN to retrieve information from that symbol's | |
1642 | info-variant-part." | |
1643 | (catch 'found | |
1644 | (mapcar | |
1645 | (lambda (element) | |
1646 | (let ((element-tag (artist-mt-get-tag element))) | |
1647 | (cond ((eq element-tag 'function-call) | |
1648 | (let* ((info-part (artist-mt-get-info-part element)) | |
1649 | (fc-symbol (artist-fc-get-symbol info-part))) | |
1650 | (if (eq fc-symbol symbol) | |
1651 | (throw 'found (funcall retrieve-fn info-part))))) | |
1652 | ||
1653 | ((eq element-tag 'menu) | |
1654 | (let* ((info-part (artist-mt-get-info-part element)) | |
1655 | (items (artist-mn-get-items info-part)) | |
1656 | (answer (artist-fc-retrieve-from-symbol-sub | |
1657 | items symbol retrieve-fn))) | |
1658 | (if answer (throw 'found answer))))))) | |
1659 | ||
1660 | table) | |
1661 | nil)) | |
1662 | ||
1663 | (defun artist-fc-get-fn-from-symbol (symbol) | |
1664 | "Search the master table to get function from a function call SYMBOL." | |
1665 | (artist-fc-retrieve-from-symbol symbol 'artist-fc-get-fn)) | |
1666 | ||
1667 | ||
1668 | ;; | |
1669 | ;; Utilities | |
1670 | ;; | |
1671 | ||
1672 | ;; Macro that won't funcall the function if it is nil. | |
1673 | ;; | |
1674 | (defmacro artist-funcall (fn &rest args) | |
1675 | "Call function FN with ARGS iff FN is not nil." | |
1676 | (list 'if fn (cons 'funcall (cons fn args)))) | |
1677 | ||
1678 | (defun artist-butlast (l) | |
1679 | "Return the list L with all elements but the last." | |
1680 | (cond ((null l) nil) | |
1681 | ((null (cdr l)) nil) | |
1682 | (t (cons (car l) (artist-butlast (cdr l)))))) | |
1683 | ||
1684 | (defun artist-last (seq &optional n) | |
1685 | "Return the last link in the list SEQ. | |
1686 | With optional argument N, returns Nth-to-last link (default 1)." | |
1687 | (if (not n) | |
1688 | (setq n 1)) | |
1689 | (let ((len (length seq))) | |
1690 | (elt seq (- len n)))) | |
1691 | ||
1692 | (defun artist-remove-nulls (l) | |
1693 | "Remove nils in list L." | |
1694 | (cond ((null l) nil) | |
1695 | ((null (car l)) (artist-remove-nulls (cdr l))) | |
1696 | (t (cons (car l) (artist-remove-nulls (cdr l)))))) | |
1697 | ||
1698 | (defun artist-uniq (l) | |
1699 | "Remove consecutive duplicates in list L. Comparison is done with `equal'." | |
1700 | (cond ((null l) nil) | |
1701 | ((null (cdr l)) l) ; only one element in list | |
1702 | ((equal (car l) (car (cdr l))) (artist-uniq (cdr l))) ; first 2 equal | |
1703 | (t (cons (car l) (artist-uniq (cdr l)))))) ; first 2 are different | |
1704 | ||
1705 | (defmacro artist-push (x stack) | |
1706 | "Push element X to a STACK." | |
1707 | (list 'setq stack (list 'cons x stack))) | |
1708 | ||
1709 | (defmacro artist-pop (stack) | |
1710 | "Pop an element from a STACK." | |
1711 | (list 'prog1 | |
1712 | (list 'car stack) | |
1713 | (list 'setq stack (list 'cdr stack)))) | |
1714 | ||
1715 | (defun artist-string-split (str r) | |
1716 | "Split string STR at occurrences of regexp R, returning a list of strings." | |
1717 | (let ((res nil) | |
1718 | (start 0) | |
1719 | (match-pos 0)) | |
1720 | (while (setq match-pos (string-match r str start)) | |
1721 | (setq res (cons (copy-sequence (substring str start match-pos)) res)) | |
1722 | (setq start (match-end 0))) | |
1723 | (if (null res) | |
1724 | (list str) | |
1725 | (if (< (match-end 0) (- (length str) 1)) | |
1726 | (setq res (cons (substring str (match-end 0) (length str)) res))) | |
1727 | (reverse res)))) | |
1728 | ||
1729 | (defun artist-string-to-file (str file-name) | |
1730 | "Write string STR to file FILE-NAME." | |
1731 | (write-region str 'end-is-ignored file-name nil 'no-message)) | |
1732 | ||
1733 | (defun artist-file-to-string (file-name) | |
1734 | "Read from file FILE-NAME into a string." | |
1735 | (save-excursion | |
1736 | (let ((tmp-buffer (get-buffer-create (concat "*artist-" file-name "*")))) | |
1737 | (set-buffer tmp-buffer) | |
1738 | (goto-char (point-min)) | |
1739 | (insert-file-contents file-name nil nil nil t) | |
1740 | (let ((str (copy-sequence (buffer-substring (point-min) | |
1741 | (point-max))))) | |
1742 | (kill-buffer tmp-buffer) | |
1743 | str)))) | |
1744 | ||
1745 | (defun artist-clear-buffer (buf) | |
1746 | "Clear contents of buffer BUF." | |
1747 | (save-excursion | |
1748 | (set-buffer buf) | |
1749 | (goto-char (point-min)) | |
1750 | (delete-char (- (point-max) (point-min)) nil))) | |
1751 | ||
1752 | ||
1753 | (defun artist-system (program stdin &optional program-args) | |
1754 | "Run PROGRAM synchronously with the contents of string STDIN to stdin. | |
1755 | Optional args PROGRAM-ARGS are arguments to PROGRAM. | |
1756 | Return a list (RETURN-CODE STDOUT STDERR)." | |
1757 | (save-excursion | |
1758 | (let* ((tmp-stdin-file-name (if stdin | |
1759 | (make-temp-name | |
1760 | (concat (file-name-as-directory | |
1761 | (or (getenv "TMPDIR") "/tmp")) | |
1762 | "artist-stdin.")) | |
1763 | nil)) | |
1764 | (tmp-stdout-buffer (get-buffer-create | |
1765 | (concat "*artist-" program "*"))) | |
1766 | (tmp-stderr-file-name (make-temp-name | |
1767 | (concat (file-name-as-directory | |
1768 | (or (getenv "TMPDIR") "/tmp")) | |
1769 | "artist-stdout."))) | |
1770 | (binary-process-input nil) ; for msdos | |
1771 | (binary-process-output nil)) | |
1772 | ||
1773 | ;; Prepare stdin | |
1774 | (if stdin (artist-string-to-file stdin tmp-stdin-file-name)) | |
1775 | ||
1776 | ;; Clear the buffer | |
1777 | (artist-clear-buffer tmp-stdout-buffer) | |
1778 | ||
1779 | ;; Start the program | |
1780 | (unwind-protect | |
1781 | (let ((res (if program-args | |
1782 | (apply 'call-process | |
1783 | program | |
1784 | tmp-stdin-file-name | |
1785 | (list tmp-stdout-buffer | |
1786 | tmp-stderr-file-name) | |
1787 | nil | |
1788 | (if (stringp program-args) | |
1789 | (list program-args) | |
1790 | program-args)) | |
1791 | (apply 'call-process | |
1792 | program | |
1793 | tmp-stdin-file-name | |
1794 | (list tmp-stdout-buffer | |
1795 | tmp-stderr-file-name) | |
1796 | nil)))) | |
1797 | ||
1798 | ;; the return value | |
1799 | (list res | |
1800 | (save-excursion | |
1801 | (set-buffer tmp-stdout-buffer) | |
1802 | (copy-sequence (buffer-substring (point-min) | |
1803 | (point-max)))) | |
1804 | (artist-file-to-string tmp-stderr-file-name))) | |
1805 | ||
1806 | ;; Unwind: remove temporary files and buffers | |
1807 | (if (and stdin (file-exists-p tmp-stdin-file-name)) | |
1808 | (delete-file tmp-stdin-file-name)) | |
1809 | (if (file-exists-p tmp-stderr-file-name) | |
1810 | (delete-file tmp-stderr-file-name)) | |
1811 | (if (memq tmp-stdout-buffer (buffer-list)) | |
1812 | (kill-buffer tmp-stdout-buffer)))))) | |
1813 | ||
1814 | ;; Routines that deal with the buffer | |
1815 | ;; | |
1816 | ;; artist-current-line get line number (top of buffer is 0) | |
1817 | ;; | |
1818 | ;; artist-move-to-xy move to (x,y) (0,0) is beg-of-buffer | |
1819 | ;; | |
1820 | ;; artist-get-char-at-xy get char in at (x,y) | |
1821 | ;; | |
1822 | ;; artist-replace-char overwrite (replace) char at point | |
1823 | ;; artist-replace-chars overwrite (replace) chars at point | |
1824 | ;; | |
1825 | ||
1826 | (defsubst artist-current-column () | |
1827 | "Return point's current column." | |
1828 | (current-column)) | |
1829 | ||
1830 | (defsubst artist-current-line () | |
1831 | "Return point's current line, buffer-relative. Top of buffer is 0." | |
1832 | (+ (count-lines 1 (point)) | |
1833 | (if (= (current-column) 0) 1 0) | |
1834 | -1)) | |
1835 | ||
1836 | (defsubst artist-move-to-xy (x y) | |
1837 | "Move to column X, at row Y from the top of buffer. Top line is 0." | |
1838 | ;; | |
1839 | ;; Q: Why do we do forward-line twice? | |
1840 | ;; A: The documentation for forward-line says | |
1841 | ;; | |
1842 | ;; "... Returns the count of lines left to move. ... With | |
1843 | ;; positive N, a non-empty line at the end counts as one | |
1844 | ;; line successfully moved (for the return value)." | |
1845 | ;; | |
1846 | ;; This means that if we are trying to move forward past the end | |
1847 | ;; of the buffer, and that last line happened to be longer than | |
1848 | ;; the current column, then we end up at the end of that last | |
1849 | ;; line, and forward-line returns one less than we actually | |
1850 | ;; wanted to move. | |
1851 | ;; | |
1852 | ;; Example: In the figure below, the `X' is the very last | |
1853 | ;; character in the buffer ("a non-empty line at the | |
1854 | ;; end"). Suppose point is at at P. Then (forward-line 1) | |
1855 | ;; returns 0 and puts point after the `X'. | |
1856 | ;; | |
1857 | ;; --------top of buffer-------- | |
1858 | ;; | |
1859 | ;; P X | |
1860 | ;; -------bottom of buffer------ | |
1861 | ;; | |
1862 | ;; But, if we are at the end of buffer when trying to move | |
1863 | ;; forward, then forward-line will return the (for us) correct | |
1864 | ;; value, which is good, because we will come to the end of the | |
1865 | ;; buffer by the first forward-line. The second forward-line | |
1866 | ;; will then get us where we really wanted to go. | |
1867 | ;; | |
1868 | ;; If we are not moving past the end of the buffer, then the | |
1869 | ;; second forward-line will return 0. | |
1870 | ;; | |
1871 | ;; Q: What happens if we are moving upwards? | |
1872 | ;; A: That will work good. insert-char won't insert a negative | |
1873 | ;; number of chars, and forward-line will fail silently if we are | |
1874 | ;; moving past the beginning of the buffer. | |
1875 | ;; | |
1876 | (forward-line (- y (artist-current-line))) | |
1877 | (insert-char ?\n (forward-line (- y (artist-current-line)))) | |
1878 | (move-to-column (max x 0) t) | |
1879 | (let ((curr-y (artist-current-line))) | |
1880 | (setq artist-draw-region-min-y (min curr-y artist-draw-region-min-y)) | |
1881 | (setq artist-draw-region-max-y (max curr-y artist-draw-region-max-y)))) | |
1882 | ||
1883 | (defsubst artist-get-char-at-xy (x y) | |
1884 | "Return the character found at column X, row Y. | |
1885 | Also updates the variables `artist-draw-min-y' and `artist-draw-max-y'." | |
1886 | (artist-move-to-xy x y) | |
1887 | (let ((curr-y (artist-current-line))) | |
1888 | (setq artist-draw-region-min-y (min curr-y artist-draw-region-min-y)) | |
1889 | (setq artist-draw-region-max-y (max curr-y artist-draw-region-max-y))) | |
1890 | (following-char)) | |
1891 | ||
1892 | ||
1893 | (defun artist-get-char-at-xy-conv (x y) | |
1894 | "Retrieve the character at X, Y, converting tabs and new-lines to spaces." | |
1895 | (save-excursion | |
1896 | (aref artist-replacement-table (artist-get-char-at-xy x y)))) | |
1897 | ||
1898 | ||
1899 | (defun artist-replace-char (new-char) | |
1900 | "Replace the character at point with NEW-CHAR." | |
1901 | ;; Check that the variable exists first. The doc says it was added in 19.23. | |
1902 | (if (and (and (boundp 'emacs-major-version) (>= emacs-major-version 20)) | |
1903 | (and (boundp 'emacs-minor-version) (<= emacs-minor-version 3))) | |
1904 | ;; This is a bug workaround for Emacs 20, versions up to 20.3: | |
1905 | ;; The self-insert-command doesn't care about the overwrite-mode, | |
1906 | ;; so the insertion is done in the same way as in picture mode. | |
1907 | ;; This seems to be a little bit slower. | |
1908 | (progn | |
1909 | (artist-move-to-xy (1+ (artist-current-column)) | |
1910 | (artist-current-line)) | |
1911 | (delete-char -1) | |
1912 | (insert (aref artist-replacement-table new-char))) | |
1913 | ;; In emacs-19, the self-insert-command works better and faster | |
1914 | (let ((overwrite-mode 'overwrite-mode-textual) | |
1915 | (fill-column 32765) ; Large :-) | |
1916 | (blink-matching-paren nil)) | |
1917 | (setq last-command-event (aref artist-replacement-table new-char)) | |
1918 | (self-insert-command 1)))) | |
1919 | ||
1920 | (defun artist-replace-chars (new-char count) | |
1921 | "Replace characters at point with NEW-CHAR. COUNT chars are replaced." | |
1922 | ;; Check that the variable exists first. The doc says it was added in 19.23. | |
1923 | (if (and (and (boundp 'emacs-major-version) (>= emacs-major-version 20)) | |
1924 | (and (boundp 'emacs-minor-version) (<= emacs-minor-version 3))) | |
1925 | ;; This is a bug workaround for Emacs 20, versions up to 20.3: | |
1926 | ;; The self-insert-command doesn't care about the overwrite-mode, | |
1927 | ;; so the insertion is done in the same way as in picture mode. | |
1928 | ;; This seems to be a little bit slower. | |
1929 | (let* ((replaced-c (aref artist-replacement-table new-char)) | |
1930 | (replaced-s (let ((tmp-s "") (i count)) | |
1931 | (while (> i 0) | |
1932 | (setq i (1- i)) | |
1933 | (setq tmp-s (concat tmp-s replaced-c)))))) | |
1934 | (artist-move-to-xy (+ (artist-current-column) count) | |
1935 | (artist-current-line)) | |
1936 | (delete-char (- count)) | |
1937 | (insert replaced-s)) | |
1938 | ;; In emacs-19, the self-insert-command works better | |
1939 | (let ((overwrite-mode 'overwrite-mode-textual) | |
1940 | (fill-column 32765) ; Large :-) | |
1941 | (blink-matching-paren nil)) | |
1942 | (setq last-command-event (aref artist-replacement-table new-char)) | |
1943 | (self-insert-command count)))) | |
1944 | ||
1945 | (defsubst artist-replace-string (string &optional see-thru) | |
1946 | "Replace contents at point with STRING. | |
1947 | With optional argument SEE-THRU, set to non-nil, text in the buffer | |
1948 | ``shines thru'' blanks in the STRING." | |
1949 | (let ((char-list (append string nil)) ; convert the string to a list | |
1950 | (overwrite-mode 'overwrite-mode-textual) | |
1951 | (fill-column 32765) ; Large :-) | |
1952 | (blink-matching-paren nil)) | |
1953 | (while char-list | |
1954 | (let ((c (car char-list))) | |
1955 | (if (and see-thru (= (aref artist-replacement-table c) ?\ )) | |
1956 | (artist-move-to-xy (1+ (artist-current-column)) | |
1957 | (artist-current-line)) | |
1958 | (artist-replace-char c))) | |
1959 | (setq char-list (cdr char-list))))) | |
1960 | ||
1961 | ;; | |
1962 | ;; Routines for setting and unsetting points | |
1963 | ;; Used when not rubber-banding | |
1964 | ;; | |
1965 | (defun artist-no-rb-unset-point1 () | |
1966 | "Unsets point 1 when not rubber-banding." | |
1967 | (let ((x-now (artist-current-column)) | |
1968 | (y-now (artist-current-line)) | |
1969 | (x (aref artist-rb-save-data 0)) | |
1970 | (y (aref artist-rb-save-data 1))) | |
1971 | (artist-move-to-xy x y) | |
1972 | (artist-replace-char (aref artist-rb-save-data 2)) | |
1973 | (artist-move-to-xy x-now y-now))) | |
1974 | ||
1975 | (defun artist-no-rb-set-point1 (x y) | |
1976 | "Set point 1 at X, Y when not rubber-banding." | |
1977 | (let ((x-now (artist-current-column)) | |
1978 | (y-now (artist-current-line))) | |
1979 | (aset artist-rb-save-data 0 x) | |
1980 | (aset artist-rb-save-data 1 y) | |
1981 | (aset artist-rb-save-data 2 (artist-get-char-at-xy x y)) | |
1982 | (artist-move-to-xy x y) | |
1983 | (artist-replace-char artist-first-char) | |
1984 | (artist-move-to-xy x-now y-now) | |
1985 | (aset artist-rb-save-data 6 0))) | |
1986 | ||
1987 | (defun artist-no-rb-unset-point2 () | |
1988 | "This function unsets point 2 when not rubber-banding." | |
1989 | (if (= (aref artist-rb-save-data 6) 1) | |
1990 | (let ((x-now (artist-current-column)) | |
1991 | (y-now (artist-current-line)) | |
1992 | (x (aref artist-rb-save-data 3)) | |
1993 | (y (aref artist-rb-save-data 4))) | |
1994 | (artist-move-to-xy x y) | |
1995 | (artist-replace-char (aref artist-rb-save-data 5)) | |
1996 | (artist-move-to-xy x-now y-now)))) | |
1997 | ||
1998 | (defun artist-no-rb-set-point2 (x y) | |
1999 | "Set point 2 at X, Y when not rubber-banding." | |
2000 | (let ((x-now (artist-current-column)) | |
2001 | (y-now (artist-current-line))) | |
2002 | (aset artist-rb-save-data 3 x) | |
2003 | (aset artist-rb-save-data 4 y) | |
2004 | (aset artist-rb-save-data 5 (artist-get-char-at-xy x y)) | |
2005 | (artist-move-to-xy x y) | |
2006 | (artist-replace-char artist-second-char) | |
2007 | (artist-move-to-xy x-now y-now) | |
2008 | (aset artist-rb-save-data 6 1))) | |
2009 | ||
2010 | (defun artist-no-rb-unset-points () | |
2011 | "This function unsets point 1 and 2 when not rubber-banding." | |
2012 | (artist-no-rb-unset-point1) | |
2013 | (artist-no-rb-unset-point2)) | |
2014 | ||
2015 | ||
2016 | ;; artist-intersection-char | |
2017 | ;; | |
2018 | ;; Note: If changing this, see the notes for artist-unintersection-char | |
2019 | ;; and artist-vaporize-lines | |
2020 | ;; | |
2021 | (defun artist-intersection-char (new-c old-c) | |
2022 | "Calculates intersection character when drawing a NEW-C on top of an OLD-C. | |
2023 | Return character according to this scheme: | |
2024 | ||
2025 | OLD-C NEW-C return | |
2026 | - | + | |
2027 | | - + | |
2028 | + | + | |
2029 | + - + | |
2030 | \\ / X | |
2031 | / \\ X | |
2032 | X / X | |
2033 | X \\ X | |
2034 | other combinations NEW-C" | |
2035 | ||
2036 | (cond ((and (= old-c ?- ) (= new-c ?| )) ?+ ) | |
2037 | ((and (= old-c ?| ) (= new-c ?- )) ?+ ) | |
2038 | ((and (= old-c ?+ ) (= new-c ?- )) ?+ ) | |
2039 | ((and (= old-c ?+ ) (= new-c ?| )) ?+ ) | |
2040 | ((and (= old-c ?\\ ) (= new-c ?/ )) ?X ) | |
2041 | ((and (= old-c ?/ ) (= new-c ?\\ )) ?X ) | |
2042 | ((and (= old-c ?X ) (= new-c ?/ )) ?X ) | |
2043 | ((and (= old-c ?X ) (= new-c ?\\ )) ?X ) | |
2044 | (t new-c))) | |
2045 | ||
2046 | ;; artist-unintersection-char | |
2047 | ;; | |
2048 | ;; Note: If changing this, see the note for artist-vaporize-lines | |
2049 | ;; | |
2050 | (defun artist-unintersection-char (line-c buffer-c) | |
2051 | "Restore character to before intersection when removing LINE-C from BUFFER-C. | |
2052 | Return character according to this scheme: | |
2053 | ||
2054 | LINE-C BUFFER-C return | |
2055 | - + | | |
2056 | | + - | |
2057 | \\ X / | |
2058 | / X \\ | |
2059 | other combinations `artist-erase-char'." | |
2060 | ||
2061 | (cond ((and (= line-c ?- ) (= buffer-c ?+ )) ?| ) | |
2062 | ((and (= line-c ?| ) (= buffer-c ?+ )) ?- ) | |
2063 | ((and (= line-c ?\\ ) (= buffer-c ?X )) ?/ ) | |
2064 | ((and (= line-c ?/ ) (= buffer-c ?X )) ?\\ ) | |
2065 | ((= line-c buffer-c) artist-erase-char) | |
2066 | (t buffer-c))) | |
2067 | ||
2068 | ||
2069 | ;; Computing the line-char to use | |
2070 | ;; for use with borderless shapes | |
2071 | ;; | |
2072 | (defsubst artist-compute-line-char () | |
2073 | "Compute which character to use for lines, if any. | |
2074 | Return value is either nil for the default characters that make up lines, or | |
2075 | a character chosen depending on the variables `artist-borderless-shapes', | |
2076 | `artist-fill-char-set', `artist-fill-char' and | |
2077 | `artist-line-char-set' and `artist-line-char'." | |
2078 | (if (and artist-borderless-shapes artist-fill-char-set) | |
2079 | artist-fill-char | |
2080 | (if artist-line-char-set | |
2081 | artist-line-char | |
2082 | nil))) | |
2083 | ||
2084 | ||
2085 | ;; Things for drawing horizontal, vertical and diagonal (straight) lines. | |
2086 | ;; | |
2087 | ;; A line here is a vector: | |
2088 | ;; [ start-x start-y length direction saved-char-1 saved-char-2 ... ] | |
2089 | ;; directions start with 0 at the x-axis and counts anti clockwise. | |
2090 | ;; | |
2091 | (defvar artist-direction-info | |
2092 | ;; x y char | |
2093 | [ [ 1 0 ?- ] ; direction 0 | |
2094 | [ 1 1 ?\\ ] ; direction 1 | |
2095 | [ 0 1 ?| ] ; direction 2 | |
2096 | [ -1 1 ?/ ] ; direction 3 | |
2097 | [ -1 0 ?- ] ; direction 4 | |
2098 | [ -1 -1 ?\\ ] ; direction 5 | |
2099 | [ 0 -1 ?| ] ; direction 6 | |
2100 | [ 1 -1 ?/ ] ] ; direction 7 | |
2101 | "Table used for stepping x and y coordinates in a specific direction. | |
2102 | This table is also used for determining which char to use for that direction.") | |
2103 | ||
2104 | (defsubst artist-direction-step-x (direction) | |
2105 | "Return the x-step for DIRECTION from the `artist-direction-info' table." | |
2106 | (aref (aref artist-direction-info direction) 0)) | |
2107 | ||
2108 | (defsubst artist-direction-step-y (direction) | |
2109 | "Return the y-step for DIRECTION from the `artist-direction-info' table." | |
2110 | (aref (aref artist-direction-info direction) 1)) | |
2111 | ||
2112 | (defun artist-direction-char (direction) | |
2113 | "Return the character for DIRECTION from the `artist-direction-info' table." | |
2114 | (aref (aref artist-direction-info direction) 2)) | |
2115 | ||
2116 | ;; artist-find-direction | |
2117 | ;; | |
2118 | ;; | |
2119 | ;; | |
2120 | (defun artist-find-direction (x1 y1 x2 y2) | |
2121 | "Find the direction from point X1,Y1 to X2,Y2. | |
2122 | Returns a DIRECTION, a number 0--7, coded as follows: | |
2123 | ||
2124 | 5 6 7 | |
2125 | \\ | / | |
2126 | 4 - * - 0 | |
2127 | / | \\ | |
2128 | 3 2 1" | |
2129 | (let ((delta-x (- x2 x1)) | |
2130 | (delta-y (- y2 y1))) | |
2131 | (cond ((>= delta-x (* 2 (abs delta-y))) 0) | |
2132 | ((>= delta-y (* 2 (abs delta-x))) 2) | |
2133 | ((>= (- delta-x) (* 2 (abs delta-y))) 4) | |
2134 | ((>= (- delta-y) (* 2 (abs delta-x))) 6) | |
2135 | ((and (>= delta-x 0) (>= delta-y 0)) 1) | |
2136 | ((and (<= delta-x 0) (>= delta-y 0)) 3) | |
2137 | ((and (<= delta-x 0) (<= delta-y 0)) 5) | |
2138 | ((and (>= delta-x 0) (<= delta-y 0)) 7)))) | |
2139 | ||
2140 | (defun artist-straight-calculate-length (direction x1 y1 x2 y2) | |
2141 | "Calculate length for a straight line in DIRECTION from X1,Y1 to X2,Y2." | |
2142 | (cond ((or (= direction 7) | |
2143 | (= direction 0) | |
2144 | (= direction 1)) (1+ (- x2 x1))) | |
2145 | ((or (= direction 3) | |
2146 | (= direction 4) | |
2147 | (= direction 5)) (1+ (- x1 x2))) | |
2148 | (t (1+ (abs (- y2 y1)))))) | |
2149 | ||
2150 | (defun artist-sline (x1 y1 x2 y2) | |
2151 | "Create a straight line from X1,Y1 to X2,Y2." | |
2152 | (let* ((direction (artist-find-direction x1 y1 x2 y2)) | |
2153 | (length (artist-straight-calculate-length direction x1 y1 x2 y2)) | |
2154 | (line (make-vector (+ length 4) x1))) | |
2155 | ;; not needed: | |
2156 | ;; (aset line 0 x1) | |
2157 | ;; because we set all elements to x1 | |
2158 | (aset line 1 y1) | |
2159 | (aset line 2 length) | |
2160 | (aset line 3 direction) | |
2161 | line)) | |
2162 | ||
2163 | (defun artist-save-chars-under-sline (line) | |
2164 | "Save characters under a LINE." | |
2165 | (let ((x (aref line 0)) | |
2166 | (y (aref line 1)) | |
2167 | (length (+ (aref line 2) 4)) | |
2168 | (direction (aref line 3)) | |
2169 | (i 4)) | |
2170 | (while (< i length) | |
2171 | (aset line i (artist-get-char-at-xy x y)) | |
2172 | (setq x (+ x (artist-direction-step-x direction))) | |
2173 | (setq y (+ y (artist-direction-step-y direction))) | |
2174 | (setq i (1+ i)))) | |
2175 | line) | |
2176 | ||
2177 | ||
2178 | ||
2179 | ;; Things for drawing lines in all directions. | |
2180 | ;; The line drawing engine is the eight-point alrogithm. | |
2181 | ;; | |
2182 | ;; A line is here a list of (x y saved-char new-char)s. | |
2183 | ;; | |
2184 | (defvar artist-octant-info | |
2185 | ;; Initial Step in Step in | |
2186 | ;; coeffs x and y x and y | |
2187 | ;; for if q >= 0 if g < 0 | |
2188 | ;; dfdx,dfdy | |
2189 | [ [ 2 1 1 0 1 1 ] ; 1st octant | |
2190 | [ 1 2 1 1 0 1 ] ; 2nd octant | |
2191 | [ -1 2 0 1 -1 1 ] ; 3rd octant | |
2192 | [ -2 1 -1 1 -1 0 ] ; 4th octant | |
2193 | [ -2 -1 -1 0 -1 -1 ] ; 5th octant | |
2194 | [ -1 -2 -1 -1 0 -1 ] ; 6th octant | |
2195 | [ 1 -2 0 -1 1 -1 ] ; 7th octant | |
2196 | [ 2 -1 1 -1 1 0 ] ] ; 8th octant | |
2197 | "Table used by line drawing algorithm (eight point).") | |
2198 | ||
2199 | ;; Primitives for the artist-octant-info. | |
2200 | ;; Decrease octant by 1 since elt counts from 0 and octant counts from 1. | |
2201 | ;; | |
2202 | (defsubst artist-get-dfdx-init-coeff (octant) | |
2203 | "Retrieve dfdx component for OCTANT." | |
2204 | (aref (aref artist-octant-info (- octant 1)) 0)) | |
2205 | ||
2206 | (defsubst artist-get-dfdy-init-coeff (octant) | |
2207 | "Retrieve dfdy component for OCTANT." | |
2208 | (aref (aref artist-octant-info (- octant 1)) 1)) | |
2209 | ||
2210 | (defsubst artist-get-x-step-q>=0 (octant) | |
2211 | "Retrieve x-step component for OCTANT when q >= 0." | |
2212 | (aref (aref artist-octant-info (- octant 1)) 2)) | |
2213 | ||
2214 | (defsubst artist-get-y-step-q>=0 (octant) | |
2215 | "Retrieve y-step component for OCTANT when q >= 0." | |
2216 | (aref (aref artist-octant-info (- octant 1)) 3)) | |
2217 | ||
2218 | (defsubst artist-get-x-step-q<0 (octant) | |
2219 | "Retrieve x-step component for OCTANT for q < 0." | |
2220 | (aref (aref artist-octant-info (- octant 1)) 4)) | |
2221 | ||
2222 | (defsubst artist-get-y-step-q<0 (octant) | |
2223 | "Retrieve y-step component for OCTANT for q < 0." | |
2224 | (aref (aref artist-octant-info (- octant 1)) 5)) | |
2225 | ||
2226 | ||
2227 | ;; Find octant from x1 y1 x2 y2 coordinates. | |
2228 | ;; | |
2229 | (defun artist-find-octant (x1 y1 x2 y2) | |
2230 | "Find octant for a line from X1,Y1 to X2,Y2. | |
2231 | Octant are numbered 1--8, anti-clockwise as: | |
2232 | ||
2233 | \\3|2/ | |
2234 | 4\\|/1 | |
2235 | ---+--- | |
2236 | 5/|\\8 | |
2237 | /6|7\\" | |
2238 | ||
2239 | (if (<= x1 x2) ; quadrant 1 or 4 | |
2240 | (if (<= y1 y2) ; quadrant 1, octant 1 or 2 | |
2241 | (if (>= (- x2 x1) (- y2 y1)) | |
2242 | 1 | |
2243 | 2) | |
2244 | (if (>= (- x2 x1) (- (- y2 y1))) ; quadrant 4, octant 7 or 8 | |
2245 | 8 | |
2246 | 7)) | |
2247 | (if (<= y1 y2) ; quadrant 2 or 3 | |
2248 | (if (>= (- (- x2 x1)) (- y2 y1)) ; quadrant 2, octant 3 or 4 | |
2249 | 4 | |
2250 | 3) | |
2251 | (if (>= (- (- x2 x1)) (- (- y2 y1))) ; quadrant 3, octant 5 or 6 | |
2252 | 5 | |
2253 | 6)))) | |
2254 | ||
2255 | ;; Some inline funtions for creating, setting and reading | |
2256 | ;; members of a coordinate | |
2257 | ;; | |
2258 | (defsubst artist-new-coord (x y &optional new-char) | |
2259 | "Create a new coordinate at X,Y for use in a line. | |
2260 | Optional argument NEW-CHAR can be used for setting the new-char component | |
2261 | in the coord." | |
2262 | (let ((coord (make-vector 4 x))) | |
2263 | (aset coord 1 y) | |
2264 | (aset coord 3 new-char) | |
2265 | coord)) | |
2266 | ||
2267 | (defsubst artist-coord-get-x (coord) | |
2268 | "Retrieve the x component of a COORD." | |
2269 | (aref coord 0)) | |
2270 | ||
2271 | (defsubst artist-coord-get-y (coord) | |
2272 | "Retrieve the y component of a COORD." | |
2273 | (aref coord 1)) | |
2274 | ||
2275 | (defsubst artist-coord-set-x (coord new-x) | |
2276 | "Set the x component of a COORD to NEW-X." | |
2277 | (aset coord 0 new-x) | |
2278 | coord) | |
2279 | ||
2280 | (defsubst artist-coord-set-y (coord new-y) | |
2281 | "Set the y component of a COORD to NEW-Y." | |
2282 | (aset coord 1 new-y) | |
2283 | coord) | |
2284 | ||
2285 | (defsubst artist-coord-get-saved-char (coord) | |
2286 | "Retrieve the saved char component of a COORD." | |
2287 | (aref coord 2)) | |
2288 | ||
2289 | (defsubst artist-coord-get-new-char (coord) | |
2290 | "Retrieve the new char component of a COORD." | |
2291 | (aref coord 3)) | |
2292 | ||
2293 | (defsubst artist-coord-add-saved-char (coord saved-char) | |
2294 | "Set the saved char component of a COORD to SAVED-CHAR." | |
2295 | (aset coord 2 saved-char) | |
2296 | coord) | |
2297 | ||
2298 | (defsubst artist-coord-add-new-char (coord new-char) | |
2299 | "Set the new char component of a COORD to NEW-CHAR." | |
2300 | (aset coord 3 new-char) | |
2301 | coord) | |
2302 | ||
2303 | (defsubst artist-coord-set-new-char (coord new-char) | |
2304 | "Set the new char component of a COORD to NEW-CHAR." | |
2305 | (aset coord 3 new-char) | |
2306 | coord) | |
2307 | ||
2308 | ||
2309 | ;; Pretend we are plotting a pixel. Instead we just list it | |
2310 | ;; | |
2311 | (defmacro artist-put-pixel (point-list x y) | |
2312 | "In POINT-LIST, store a ``pixel'' at coord X,Y." | |
2313 | (list 'setq point-list | |
2314 | (list 'append point-list (list 'list (list 'artist-new-coord x y))))) | |
2315 | ||
2316 | ;; Calculate list of points using eight point algorithm | |
2317 | ;; return a list of coords | |
2318 | ;; | |
2319 | (defun artist-eight-point (x1 y1 x2 y2) | |
2320 | "Run the eight-point algorithm to get a list of coords from X1,Y1 to X2,Y2." | |
2321 | (let* ((point-list nil) | |
2322 | (octant (artist-find-octant x1 y1 x2 y2)) | |
2323 | (dfdx-coeff (artist-get-dfdx-init-coeff octant)) | |
2324 | (dfdy-coeff (artist-get-dfdy-init-coeff octant)) | |
2325 | (x-step-q>=0 (artist-get-x-step-q>=0 octant)) | |
2326 | (y-step-q>=0 (artist-get-y-step-q>=0 octant)) | |
2327 | (x-step-q<0 (artist-get-x-step-q<0 octant)) | |
2328 | (y-step-q<0 (artist-get-y-step-q<0 octant)) | |
2329 | (dfdx (- (- y2 y1))) | |
2330 | (dfdy (- x2 x1)) | |
2331 | (x x1) | |
2332 | (y y1) | |
2333 | (f 0) | |
2334 | (q (+ (* 2 f) | |
2335 | (* dfdx-coeff dfdx) | |
2336 | (* dfdy-coeff dfdy)))) | |
2337 | (artist-put-pixel point-list x y) | |
2338 | (while (or (not (eq x x2)) (not (eq y y2))) | |
2339 | (if (>= q 0) | |
2340 | (progn | |
2341 | (setq x (+ x x-step-q>=0)) | |
2342 | (setq y (+ y y-step-q>=0)) | |
2343 | (setq f (+ f (* x-step-q>=0 dfdx) (* y-step-q>=0 dfdy)))) | |
2344 | (progn | |
2345 | (setq x (+ x x-step-q<0)) | |
2346 | (setq y (+ y y-step-q<0)) | |
2347 | (setq f (+ f (* x-step-q<0 dfdx) (* y-step-q<0 dfdy))))) | |
2348 | (setq q (+ (* 2 f) (* dfdx-coeff dfdx) (* dfdy-coeff dfdy))) | |
2349 | (artist-put-pixel point-list x y)) | |
2350 | point-list)) | |
2351 | ||
2352 | ;; artist-save-chars-under-point-list | |
2353 | ;; Remebers the chars that were there before we did draw the line. | |
2354 | ;; Returns point-list. | |
2355 | ;; | |
2356 | (defun artist-save-chars-under-point-list (point-list) | |
2357 | "Save characters originally under POINT-LIST." | |
2358 | (mapcar | |
2359 | (lambda (coord) | |
2360 | (artist-coord-add-saved-char | |
2361 | coord | |
2362 | (artist-get-char-at-xy (artist-coord-get-x coord) | |
2363 | (artist-coord-get-y coord)))) | |
2364 | point-list)) | |
2365 | ||
2366 | ;; artist-calculate-new-char, artist-calculate-new-chars | |
2367 | ;; Calculates which char to insert depending on direction of point-list. | |
2368 | ;; | |
2369 | ;; Depending on new-coord's position relative to last-coord one of the | |
2370 | ;; following chars are returned: \ | / - o, as indicated by this: | |
2371 | ;; | |
2372 | ;; \ | / | |
2373 | ;; - o - | |
2374 | ;; / | \ | |
2375 | ;; | |
2376 | ;; artist-calculate-new-char works on one coordinate, returns char. | |
2377 | ;; artist-calculate-new-chars works on a point-list, returns point-list. | |
2378 | ;; | |
2379 | (defun artist-calculate-new-char (last-coord new-coord) | |
2380 | "Return a line-char to use when moving from LAST-COORD to NEW-COORD." | |
2381 | (let ((last-x (artist-coord-get-x last-coord)) | |
2382 | (last-y (artist-coord-get-y last-coord)) | |
2383 | (new-x (artist-coord-get-x new-coord)) | |
2384 | (new-y (artist-coord-get-y new-coord))) | |
2385 | (cond ((> new-x last-x) (cond ((< new-y last-y) ?/ ) | |
2386 | ((> new-y last-y) ?\\ ) | |
2387 | (t ?- ))) | |
2388 | ((< new-x last-x) (cond ((< new-y last-y) ?\\ ) | |
2389 | ((> new-y last-y) ?/ ) | |
2390 | (t ?- ))) | |
2391 | ((eq new-y last-y) ?o) | |
2392 | (t ?| )))) | |
2393 | ||
2394 | (defun artist-calculate-new-chars (point-list) | |
2395 | "Return a list of coords with line-chars calculated. Input: POINT-LIST." | |
2396 | (if (null (cdr point-list)) | |
2397 | (list (artist-coord-add-new-char (car point-list) ?o )) | |
2398 | (let ((last-coord (car point-list))) | |
2399 | (cons (artist-coord-add-new-char | |
2400 | (car point-list) | |
2401 | (artist-calculate-new-char (car (cdr point-list)) | |
2402 | (car point-list))) | |
2403 | (mapcar | |
2404 | (lambda (this-coord) | |
2405 | (prog1 | |
2406 | (artist-coord-add-new-char | |
2407 | this-coord | |
2408 | (artist-calculate-new-char last-coord this-coord)) | |
2409 | (setq last-coord this-coord))) | |
2410 | (cdr point-list)))))) | |
2411 | ||
2412 | ;; artist-modify-new-chars | |
2413 | ;; Replaces some characters with some other characters. | |
2414 | ;; | |
2415 | ;; artist-modify-new-chars works on a point-list, returns point-list. | |
2416 | ;; | |
2417 | (defun artist-modify-new-chars (point-list) | |
2418 | "Replace intersecting characters in POINT-LIST. | |
2419 | This function returns a point-list." | |
2420 | (mapcar | |
2421 | (lambda (coord) | |
2422 | (let* ((new-c (artist-coord-get-new-char coord)) | |
2423 | (saved-c (artist-coord-get-saved-char coord)) | |
2424 | (modified-c (artist-intersection-char new-c saved-c))) | |
2425 | (artist-coord-set-new-char coord modified-c))) | |
2426 | point-list)) | |
2427 | ||
2428 | ||
2429 | ;; | |
2430 | ;; functions for accessing endoints and elements in object requiring | |
2431 | ;; 2 endpoints | |
2432 | ;; | |
2433 | ||
2434 | (defun artist-make-endpoint (x y) | |
2435 | "Create an endpoint at X, Y." | |
2436 | (let ((new-endpoint (make-vector 2 x))) | |
2437 | (aset new-endpoint 1 y) | |
2438 | new-endpoint)) | |
2439 | ||
2440 | (defun artist-endpoint-get-x (endpoint) | |
2441 | "Retrieve the x component of an ENDPOINT." | |
2442 | (aref endpoint 0)) | |
2443 | ||
2444 | (defun artist-endpoint-get-y (endpoint) | |
2445 | "Retrieve the y component of an ENDPOINT." | |
2446 | (aref endpoint 1)) | |
2447 | ||
2448 | (defun artist-make-2point-object (endpoint1 endpoint2 shapeinfo) | |
2449 | "Create a 2-point object of ENDPOINT1, ENDPOINT2 and SHAPEINFO." | |
2450 | (list endpoint1 endpoint2 shapeinfo)) | |
2451 | ||
2452 | (defun artist-2point-get-endpoint1 (obj) | |
2453 | "Retrieve the first endpoint of a 2-point object OBJ." | |
2454 | (elt obj 0)) | |
2455 | ||
2456 | (defun artist-2point-get-endpoint2 (obj) | |
2457 | "Retrieve the second endpoint of a 2-point object OBJ." | |
2458 | (elt obj 1)) | |
2459 | ||
2460 | (defun artist-2point-get-shapeinfo (obj) | |
2461 | "Retrieve the shapeinfo component of a 2-point object OBJ." | |
2462 | (elt obj 2)) | |
2463 | ||
2464 | ||
2465 | ;; | |
2466 | ;; Drawing and undrawing lines (any direction) | |
2467 | ;; | |
2468 | ||
2469 | (defun artist-draw-line (x1 y1 x2 y2) | |
2470 | "Draws a line from X1, Y1 to X2, Y2. | |
2471 | ||
2472 | Output is a line, which is a list (END-POINT-1 END-POINT-2 SHAPE-INFO). | |
2473 | ||
2474 | END-POINT-1 and END-POINT-2 are two-element vectors on the form [X Y]. | |
2475 | SHAPE-INFO is a list of vectors [X Y SAVED-CHAR NEW-CHAR]." | |
2476 | (let ((endpoint1 (artist-make-endpoint x1 y1)) | |
2477 | (endpoint2 (artist-make-endpoint x2 y2))) | |
2478 | (artist-make-2point-object | |
2479 | endpoint1 | |
2480 | endpoint2 | |
2481 | (mapcar | |
2482 | (lambda (coord) | |
2483 | (artist-move-to-xy (artist-coord-get-x coord) | |
2484 | (artist-coord-get-y coord)) | |
2485 | (if artist-line-char-set | |
2486 | (artist-replace-char artist-line-char) | |
2487 | (artist-replace-char (artist-coord-get-new-char coord))) | |
2488 | coord) | |
2489 | (artist-modify-new-chars | |
2490 | (artist-calculate-new-chars | |
2491 | (artist-save-chars-under-point-list | |
2492 | (artist-eight-point x1 y1 x2 y2)))))))) | |
2493 | ||
2494 | (defun artist-undraw-line (line) | |
2495 | "Undraws LINE." | |
2496 | (mapcar | |
2497 | (lambda (coord) | |
2498 | (artist-move-to-xy (artist-coord-get-x coord) | |
2499 | (artist-coord-get-y coord)) | |
2500 | (artist-replace-char (artist-coord-get-saved-char coord)) | |
2501 | coord) | |
2502 | (artist-2point-get-shapeinfo line))) | |
2503 | ||
2504 | ;; | |
2505 | ;; Drawing and undrawing straight lines | |
2506 | ;; | |
2507 | ||
2508 | (defun artist-draw-sline (x1 y1 x2 y2) | |
2509 | "Draw a strait line from X1, Y1 to X2, Y2. | |
2510 | Straight lines are vertical, horizontal or diagonal lines. | |
2511 | They are faster to draw and most often they are what you need | |
2512 | when drawing a simple image. | |
2513 | ||
2514 | Output is a straight line, which is a list on the form | |
2515 | (END-POINT-1 END-POINT-2 SHAPE-INFO). | |
2516 | ||
2517 | END-POINT-1 and END-POINT-2 are two-element vectors on the form [X Y]. | |
2518 | SHAPE-INFO is a vector [START-X START-Y LENGTH-OF-LINE DIRECTION | |
2519 | ORIGINAL-CHAR-1 ORIGINAL-CHAR-2 ... ]." | |
2520 | (let* ((line (artist-save-chars-under-sline (artist-sline x1 y1 x2 y2))) | |
2521 | (x (aref line 0)) | |
2522 | (y (aref line 1)) | |
2523 | (length (+ (aref line 2) 4)) | |
2524 | (direction (aref line 3)) | |
2525 | (line-char (artist-direction-char direction)) | |
2526 | (i 4) | |
2527 | (endpoint1 (artist-make-endpoint x y)) | |
2528 | (endpoint2 nil)) | |
2529 | (while (< i length) | |
2530 | (artist-move-to-xy x y) | |
2531 | (if artist-line-char-set | |
2532 | (artist-replace-char artist-line-char) | |
2533 | (artist-replace-char (artist-intersection-char | |
2534 | line-char | |
2535 | (aref line i)))) | |
2536 | (if (not (< (1+ i) length)) | |
2537 | ;; This is the last element. Set the second endpoint | |
2538 | (setq endpoint2 (artist-make-endpoint x y))) | |
2539 | (setq x (+ x (artist-direction-step-x direction))) | |
2540 | (setq y (+ y (artist-direction-step-y direction))) | |
2541 | (setq i (1+ i))) | |
2542 | (artist-make-2point-object endpoint1 endpoint2 line))) | |
2543 | ||
2544 | ||
2545 | (defun artist-undraw-sline (line) | |
2546 | "Undraw a straight line LINE." | |
2547 | (if line | |
2548 | (let* ((shape-info (artist-2point-get-shapeinfo line)) | |
2549 | (x (aref shape-info 0)) | |
2550 | (y (aref shape-info 1)) | |
2551 | (length (+ (aref shape-info 2) 4)) | |
2552 | (direction (aref shape-info 3)) | |
2553 | (i 4)) | |
2554 | (while (< i length) | |
2555 | (artist-move-to-xy x y) | |
2556 | (artist-replace-char (aref shape-info i)) | |
2557 | (setq x (+ x (artist-direction-step-x direction))) | |
2558 | (setq y (+ y (artist-direction-step-y direction))) | |
2559 | (setq i (1+ i)))))) | |
2560 | ||
2561 | ||
2562 | ;; | |
2563 | ;; Drawing and undrawing rectangles and squares | |
2564 | ;; | |
2565 | ||
2566 | (defun artist-draw-rect (x1 y1 x2 y2) | |
2567 | "Draws a rectangle with corners at X1, Y1 and X2, Y2. | |
2568 | ||
2569 | Output is a rectangle, which is a list on the form | |
2570 | (END-POINT-1 END-POINT-2 SHAPE-INFO). | |
2571 | ||
2572 | END-POINT-1 and END-POINT-2 are two-element vectors on the form [X Y]. | |
2573 | SHAPE-INFO is a list of four straight lines." | |
2574 | (let* ((artist-line-char (artist-compute-line-char)) | |
2575 | (artist-line-char-set artist-line-char) | |
2576 | (line1 (artist-draw-sline x1 y1 x2 y1)) | |
2577 | (line2 (artist-draw-sline x2 y1 x2 y2)) | |
2578 | (line3 (artist-draw-sline x2 y2 x1 y2)) | |
2579 | (line4 (artist-draw-sline x1 y2 x1 y1)) | |
2580 | (endpoint1 (artist-make-endpoint x1 y1)) | |
2581 | (endpoint2 (artist-make-endpoint x2 y2))) | |
2582 | (artist-make-2point-object endpoint1 | |
2583 | endpoint2 | |
2584 | (list line1 line2 line3 line4)))) | |
2585 | ||
2586 | (defun artist-undraw-rect (rectangle) | |
2587 | "Undraws RECTANGLE." | |
2588 | (if rectangle | |
2589 | (let ((shape-info (artist-2point-get-shapeinfo rectangle))) | |
2590 | (artist-undraw-sline (elt shape-info 3)) | |
2591 | (artist-undraw-sline (elt shape-info 2)) | |
2592 | (artist-undraw-sline (elt shape-info 1)) | |
2593 | (artist-undraw-sline (elt shape-info 0))))) | |
2594 | ||
2595 | ||
2596 | (defun artist-rect-corners-squarify (x1 y1 x2 y2) | |
2597 | "Compute square corners from rectangle corners at X1, Y1 and X2, Y2. | |
2598 | The square's first corner will be X1, Y1. The position of the second corner | |
2599 | depends on which of X2 and Y2 is most far away from X1, Y1." | |
2600 | (let* ((delta-x (- x2 x1)) | |
2601 | (delta-y (- y2 y1)) | |
2602 | (delta-x-sign (if (< delta-x 0) -1 1)) | |
2603 | (delta-y-sign (if (< delta-y 0) -1 1)) | |
2604 | (new-x2) ; set below | |
2605 | (new-y2)) ; set below | |
2606 | ||
2607 | ;; Check which of x2 and y2 is most distant | |
2608 | ;; take care to the aspect ratio | |
2609 | (if (> (abs delta-x) (abs delta-y)) | |
2610 | ||
2611 | ;; *** x2 more distant than y2 (with care taken to aspect ratio) | |
2612 | (progn | |
2613 | (setq new-x2 x2) | |
2614 | (setq new-y2 (+ y1 (round (/ (* (abs delta-x) delta-y-sign) | |
2615 | artist-aspect-ratio))))) | |
2616 | ||
2617 | ;; *** y2 more distant than x2 (with care taken to aspect ratio) | |
2618 | (progn | |
2619 | (setq new-x2 (round (+ x1 (* (* (abs delta-y) delta-x-sign) | |
2620 | artist-aspect-ratio)))) | |
2621 | (setq new-y2 y2))) | |
2622 | ||
2623 | ;; Return this | |
2624 | (list x1 y1 new-x2 new-y2))) | |
2625 | ||
2626 | ||
2627 | (defun artist-draw-square (x1 y1 x2 y2) | |
2628 | "Draw a square with corners at X1, Y1 and X2, Y2. | |
2629 | ||
2630 | Output is a square, which is a list on the form | |
2631 | (END-POINT-1 END-POINT-2 SHAPE-INFO). | |
2632 | ||
2633 | END-POINT-1 and END-POINT-2 are two-element vectors on the form [X Y]. | |
2634 | SHAPE-INFO is a list of four straight lines." | |
2635 | (let* ((artist-line-char (artist-compute-line-char)) | |
2636 | (artist-line-char-set artist-line-char) | |
2637 | (square-corners (artist-rect-corners-squarify x1 y1 x2 y2)) | |
2638 | (new-x1 (elt square-corners 0)) | |
2639 | (new-y1 (elt square-corners 1)) | |
2640 | (new-x2 (elt square-corners 2)) | |
2641 | (new-y2 (elt square-corners 3)) | |
2642 | (endpoint1 (artist-make-endpoint new-x1 new-y1)) | |
2643 | (endpoint2 (artist-make-endpoint new-x2 new-y2)) | |
2644 | (line1 (artist-draw-sline new-x1 new-y1 new-x2 new-y1)) | |
2645 | (line2 (artist-draw-sline new-x2 new-y1 new-x2 new-y2)) | |
2646 | (line3 (artist-draw-sline new-x2 new-y2 new-x1 new-y2)) | |
2647 | (line4 (artist-draw-sline new-x1 new-y2 new-x1 new-y1))) | |
2648 | (artist-make-2point-object endpoint1 | |
2649 | endpoint2 | |
2650 | (list line1 line2 line3 line4)))) | |
2651 | ||
2652 | (defun artist-undraw-square (square) | |
2653 | "Undraws SQUARE." | |
2654 | (if square | |
2655 | (let ((shape-info (artist-2point-get-shapeinfo square))) | |
2656 | (artist-undraw-sline (elt shape-info 3)) | |
2657 | (artist-undraw-sline (elt shape-info 2)) | |
2658 | (artist-undraw-sline (elt shape-info 1)) | |
2659 | (artist-undraw-sline (elt shape-info 0))))) | |
2660 | ||
2661 | ;; | |
2662 | ;; Filling rectangles and squares | |
2663 | ;; | |
2664 | ||
2665 | (defun artist-fill-rect (rect x1 y1 x2 y2) | |
2666 | "Fill rectangle RECT from X1,Y1 to X2,Y2." | |
2667 | (let ((x (1+ (min x1 x2))) | |
2668 | (y (1+ (min y1 y2))) | |
2669 | (x-max (max x1 x2)) | |
2670 | (y-max (max y1 y2))) | |
2671 | (let ((w (- x-max x))) | |
2672 | (while (< y y-max) | |
2673 | (artist-move-to-xy x y) | |
2674 | (artist-replace-chars artist-fill-char w) | |
2675 | (setq y (1+ y)))))) | |
2676 | ||
2677 | (defun artist-fill-square (square x1 y1 x2 y2) | |
2678 | "Fills a SQUARE from X1,Y1 to X2,Y2." | |
2679 | (let* ((square-corners (artist-rect-corners-squarify x1 y1 x2 y2)) | |
2680 | (new-x1 (elt square-corners 0)) | |
2681 | (new-y1 (elt square-corners 1)) | |
2682 | (new-x2 (elt square-corners 2)) | |
2683 | (new-y2 (elt square-corners 3)) | |
2684 | (x (1+ (min new-x1 new-x2))) | |
2685 | (y (1+ (min new-y1 new-y2))) | |
2686 | (x-max (max new-x1 new-x2)) | |
2687 | (y-max (max new-y1 new-y2)) | |
2688 | (w (- x-max x))) | |
2689 | (while (< y y-max) | |
2690 | (artist-move-to-xy x y) | |
2691 | (artist-replace-chars artist-fill-char w) | |
2692 | (setq y (1+ y))))) | |
2693 | ||
2694 | ||
2695 | ;; | |
2696 | ;; Pen drawing | |
2697 | ;; | |
2698 | ||
2699 | (defun artist-pen (x1 y1) | |
2700 | "Draws a character at X1, Y1. | |
2701 | The character is replaced with the character in `artist-fill-char'." | |
2702 | (artist-move-to-xy x1 y1) | |
2703 | (artist-replace-char (if artist-line-char-set | |
2704 | artist-line-char | |
2705 | (if artist-fill-char-set | |
2706 | artist-fill-char | |
2707 | artist-default-fill-char)))) | |
2708 | ||
2709 | ||
2710 | (defun artist-pen-line (x1 y1) | |
2711 | "Draws a line from last pen position to X1, Y1. | |
2712 | The character is replaced with the character in `artist-fill-char'. | |
2713 | This will store all points in `artist-key-poly-point-list' in reversed | |
2714 | order (I assume it is faster to cons to the beginning of the list than | |
2715 | to append to the end of the list, when doing free-hand drawing)." | |
2716 | (let ((artist-line-char (if artist-line-char-set | |
2717 | artist-line-char | |
2718 | (if artist-fill-char-set | |
2719 | artist-fill-char | |
2720 | artist-default-fill-char)))) | |
2721 | ||
2722 | ;; Draw line from last point to this | |
2723 | (let ((x-last (car (car artist-key-poly-point-list))) | |
2724 | (y-last (cdr (car artist-key-poly-point-list)))) | |
2725 | (artist-move-to-xy x-last y-last) | |
2726 | (artist-replace-char artist-line-char) | |
2727 | (artist-draw-line x-last y-last x1 y1)) | |
2728 | ||
2729 | ;; Update the point-list | |
2730 | (setq artist-key-poly-point-list | |
2731 | (cons (cons x1 y1) artist-key-poly-point-list)))) | |
2732 | ||
2733 | (defun artist-pen-reset-last-xy (x1 y1) | |
2734 | "Reset the last x and y points to X1, Y1 when doing pen-drawing." | |
2735 | (artist-clear-arrow-points) | |
2736 | (setq artist-key-poly-point-list (list (cons x1 y1)))) | |
2737 | ||
2738 | ||
2739 | (defun artist-pen-set-arrow-points (x1 y1) | |
2740 | "Set arrow points for pen drawing using X1, Y1. | |
2741 | Also, the `artist-key-poly-point-list' is reversed." | |
2742 | ||
2743 | (setq artist-key-poly-point-list | |
2744 | (artist-uniq artist-key-poly-point-list)) | |
2745 | ||
2746 | (if (>= (length artist-key-poly-point-list) 2) | |
2747 | ||
2748 | ;; Only set arrow-points if the point-list has two or more entries | |
2749 | (let ((xn (car (car artist-key-poly-point-list))) | |
2750 | (yn (cdr (car artist-key-poly-point-list))) | |
2751 | (xn-1 (car (car (cdr artist-key-poly-point-list)))) | |
2752 | (yn-1 (cdr (car (cdr artist-key-poly-point-list)))) | |
2753 | (dirn)) ; direction for point n | |
2754 | (setq artist-key-poly-point-list (reverse artist-key-poly-point-list)) | |
2755 | (let ((x0 (car (car artist-key-poly-point-list))) | |
2756 | (y0 (cdr (car artist-key-poly-point-list))) | |
2757 | (x1 (car (car (cdr artist-key-poly-point-list)))) | |
2758 | (y1 (cdr (car (cdr artist-key-poly-point-list)))) | |
2759 | (dir0)) ; direction for point 0 | |
2760 | (setq dir0 (artist-find-direction x1 y1 x0 y0)) | |
2761 | (setq dirn (artist-find-direction xn-1 yn-1 xn yn)) | |
2762 | (setq artist-arrow-point-1 (artist-make-arrow-point x0 y0 dir0)) | |
2763 | (setq artist-arrow-point-2 (artist-make-arrow-point xn yn dirn)))))) | |
2764 | ||
2765 | ||
2766 | ;; | |
2767 | ;; Text rendering | |
2768 | ;; | |
2769 | (defun artist-figlet-run (text font extra-args) | |
2770 | "Run figlet rendering TEXT using FONT. | |
2771 | EXTRA-ARGS for figlet, for the command line, may be specified." | |
2772 | (let* ((figlet-args (cond ((and font extra-args) | |
2773 | (cons (concat "-f" font) | |
2774 | (artist-string-split extra-args "[ \t]+"))) | |
2775 | (font (concat "-f" font)) | |
2776 | (extra-args | |
2777 | (artist-string-split extra-args "[ \t]+")) | |
2778 | (t nil))) | |
2779 | (figlet-output (artist-system artist-figlet-program text figlet-args)) | |
2780 | (exit-code (elt figlet-output 0)) | |
2781 | (stdout (elt figlet-output 1)) | |
2782 | (stderr (elt figlet-output 2))) | |
2783 | (if (not (= exit-code 0)) | |
2784 | (error "Failed to render font: %s (%d)" stderr exit-code)) | |
2785 | stdout)) | |
2786 | ||
2787 | (defun artist-figlet-get-font-list () | |
2788 | "Read fonts in with the shell command. | |
2789 | Returns a list of strings." | |
2790 | (let* ((cmd-interpreter "/bin/sh") | |
2791 | (ls-cmd artist-figlet-list-fonts-command) | |
2792 | (result (artist-system cmd-interpreter ls-cmd nil)) | |
2793 | (exit-code (elt result 0)) | |
2794 | (stdout (elt result 1)) | |
2795 | (stderr (elt result 2))) | |
2796 | (if (not (= exit-code 0)) | |
2797 | (error "Failed to read available fonts: %s (%d)" stderr exit-code)) | |
2798 | (artist-string-split stdout ".flf\n"))) | |
2799 | ||
2800 | (defun artist-figlet-choose-font () | |
2801 | "Read any extra arguments for figlet." | |
2802 | (interactive) | |
2803 | (let* ((avail-fonts (artist-figlet-get-font-list)) | |
2804 | (font (completing-read (concat "Select font: (default " | |
2805 | artist-figlet-default-font | |
2806 | ") ") | |
2807 | (mapcar | |
2808 | (lambda (font) (cons font font)) | |
2809 | avail-fonts)))) | |
2810 | (if (string= font "") artist-figlet-default-font font))) | |
2811 | ||
2812 | (defun artist-figlet-get-extra-args () | |
2813 | "Read any extra arguments for figlet." | |
2814 | (let ((extra-args (read-input "Extra args to figlet: "))) | |
2815 | (if (string= extra-args "") | |
2816 | nil | |
2817 | extra-args))) | |
2818 | ||
2819 | (defun artist-figlet (text) | |
2820 | "Render TEXT using figlet." | |
2821 | (let* ((figlet-font (artist-figlet-choose-font)) | |
2822 | (figlet-extra-args (artist-figlet-get-extra-args))) | |
2823 | (artist-figlet-run text figlet-font figlet-extra-args))) | |
2824 | ||
2825 | ||
2826 | (defun artist-text-insert-common (x y text see-thru) | |
2827 | "At position X, Y, insert text TEXT. | |
2828 | If SEE-THRU is non-nil, then blanks in TEXT does not replace text | |
2829 | in the buffer." | |
2830 | (let* ((string-list (artist-string-split text "\n")) | |
2831 | (i 0) | |
2832 | (len (length string-list))) | |
2833 | (while (< i len) | |
2834 | (artist-move-to-xy x (+ y i)) | |
2835 | (artist-replace-string (car string-list) see-thru) | |
2836 | (setq string-list (cdr string-list)) | |
2837 | (setq i (1+ i))))) | |
2838 | ||
2839 | (defun artist-text-insert-see-thru (x y text) | |
2840 | "At position X, Y, insert text TEXT. | |
2841 | Let text already in buffer shine thru the TEXT inserted." | |
2842 | (artist-text-insert-common x y text t)) | |
2843 | ||
2844 | (defun artist-text-insert-overwrite (x y text) | |
2845 | "At position X, Y, insert text TEXT. | |
2846 | Let blanks in TEXT overwrite any text already in the buffer." | |
2847 | (artist-text-insert-common x y text nil)) | |
2848 | ||
2849 | (defun artist-text-see-thru (x y) | |
2850 | "Prompt for text to render, render it at X,Y. | |
2851 | This is done by calling the function specified by `artist-text-renderer', | |
2852 | which must return a list of strings, to be inserted in the buffer. | |
2853 | ||
2854 | Text already in the buffer ``shines thru'' blanks in the rendered text." | |
2855 | (let* ((input-text (read-input "Type text to render: ")) | |
2856 | (rendered-text (artist-funcall artist-text-renderer input-text))) | |
2857 | (artist-text-insert-see-thru x y rendered-text))) | |
2858 | ||
2859 | ||
2860 | (defun artist-text-overwrite (x y) | |
2861 | "Prompt for text to render, render it at X,Y. | |
2862 | This is done by calling the function specified by `artist-text-renderer', | |
2863 | which must return a list of strings, to be inserted in the buffer. | |
2864 | ||
2865 | Blanks in the rendered text overwrites any text in the buffer." | |
2866 | (let* ((input-text (read-input "Type text to render: ")) | |
2867 | (rendered-text (artist-funcall artist-text-renderer input-text))) | |
2868 | (artist-text-insert-overwrite x y rendered-text))) | |
2869 | ||
2870 | ;; | |
2871 | ;; Spraying | |
2872 | ;; | |
2873 | ||
2874 | (defun artist-spray-get-interval () | |
2875 | "Retrieves the interval for repeated spray." | |
2876 | artist-spray-interval) | |
2877 | ||
2878 | (defun artist-spray-random-points (n radius) | |
2879 | "Generate N random points within a radius of RADIUS. | |
2880 | Returns a list of points. Each point is on the form (X1 . Y1)." | |
2881 | (let ((points)) | |
2882 | (while (> n 0) | |
2883 | (let* ((angle (* (random 359) (/ pi 180))) | |
2884 | (dist (random radius)) | |
2885 | (point (cons (round (* dist (cos angle))) | |
2886 | (round (* dist (sin angle)))))) | |
2887 | (setq points (cons point points))) | |
2888 | (setq n (- n 1))) | |
2889 | points)) | |
2890 | ||
2891 | (defun artist-spray (x1 y1) | |
2892 | "Spray at X1, Y1." | |
2893 | (let* ((num-points (* artist-spray-radius artist-spray-radius)) | |
2894 | (spray-points (artist-spray-random-points num-points | |
2895 | artist-spray-radius))) | |
2896 | (while spray-points | |
2897 | ;; Replace one spray point | |
2898 | (let* ((point (car spray-points)) | |
2899 | (x (+ x1 (car point))) | |
2900 | (y (+ y1 (cdr point))) | |
2901 | (buf-c (artist-get-char-at-xy-conv x y)) | |
2902 | (this-c (memq buf-c artist-spray-chars)) | |
2903 | (next-c (cond ((null this-c) artist-spray-new-char) | |
2904 | ((null (cdr this-c)) (car this-c)) | |
2905 | (t (car (cdr this-c)))))) | |
2906 | (artist-move-to-xy x y) | |
2907 | (artist-replace-char next-c)) | |
2908 | ||
2909 | ;; Step to next spray point | |
2910 | (setq spray-points (cdr spray-points))))) | |
2911 | ||
2912 | (defun artist-spray-clear-circle (circle x1 y1 x2 y2) | |
2913 | "Clears circle CIRCLE at X1, Y1 through X2, Y2." | |
2914 | (artist-undraw-circle circle)) | |
2915 | ||
2916 | (defun artist-spray-set-radius (circle x1 y1 x2 y2) | |
2917 | "Set spray radius from CIRCLE at X1, Y1 through X2, Y2." | |
2918 | (let ((dx (- x2 x1)) | |
2919 | (dy (- y2 y1))) | |
2920 | (setq artist-spray-radius (round (sqrt (+ (* dx dx) (* dy dy))))) | |
2921 | (if (= 0 artist-spray-radius) | |
2922 | (setq artist-spray-radius 1)))) | |
2923 | ||
2924 | ;; | |
2925 | ;; Erasing | |
2926 | ;; | |
2927 | ||
2928 | (defun artist-erase-char (x1 y1) | |
2929 | "Erases a character at X1, Y1. | |
2930 | The character is replaced with the character in `artist-erase-char'." | |
2931 | (artist-move-to-xy x1 y1) | |
2932 | (artist-replace-char artist-erase-char)) | |
2933 | ||
2934 | (defun artist-erase-rect (rect x1 y1 x2 y2) | |
2935 | "Erase rectangle RECT from X1, Y1, X2, Y2." | |
2936 | (let ((artist-line-char-set t) | |
2937 | (artist-fill-char-set t) | |
2938 | (artist-line-char artist-erase-char) | |
2939 | (artist-fill-char artist-erase-char)) | |
2940 | (artist-draw-rect x1 y1 x2 y2) | |
2941 | (artist-fill-rect rect x1 y1 x2 y2))) | |
2942 | ||
2943 | ||
2944 | ;; | |
2945 | ;; Vaporizing (erasing) line and lines | |
2946 | ;; | |
2947 | ||
2948 | ||
2949 | (defun artist-vap-find-endpoint (x1 y1 step-x step-y accept-set reject-set) | |
2950 | "Find one endpoint for line through X1, Y1. | |
2951 | The endpoint is searched for in the direction defined by STEP-X, STEP-Y, | |
2952 | accepting characters in the list ACCEPT-SET, stopping immediately | |
2953 | when finding characters in the list REJECT-SET. Fuzziness, that is | |
2954 | the number of consecutive characters not in ACCEPT-SET to allow as | |
2955 | part of the line, is determined by the variable `artist-vaporize-fuzziness'. | |
2956 | An endpoint is a cons pair, (ENDPOINT-X . ENDPOINT-Y)." | |
2957 | (let ((x x1) | |
2958 | (y y1) | |
2959 | (x-last x1) | |
2960 | (y-last y1) | |
2961 | (done nil)) | |
2962 | (while (not done) | |
2963 | (let ((c (artist-get-char-at-xy-conv x y))) | |
2964 | (cond ((memq c reject-set) | |
2965 | (setq done t)) | |
2966 | ||
2967 | ;; We found a character we are accepting as part of the line. | |
2968 | ;; Update position | |
2969 | ((memq c accept-set) | |
2970 | (setq x-last x | |
2971 | y-last y | |
2972 | x (+ x step-x) | |
2973 | y (+ y step-y)) | |
2974 | (if (or (< x 0) (< y 0)) ;stop at the edge | |
2975 | (setq done t))) | |
2976 | ||
2977 | ;; We found a character we are not accepting as part of | |
2978 | ;; the line Search `artist-vaporize-fuzziness' | |
2979 | ;; characters away from this position in the same | |
2980 | ;; direction to see if there are any characters in the | |
2981 | ;; accept-set. If not, we have found the endpoint. | |
2982 | (t | |
2983 | (let ((fuzziness artist-vaporize-fuzziness) | |
2984 | (x-tmp x) | |
2985 | (y-tmp y)) | |
2986 | ||
2987 | ;; while we have more fuzziness left and we have not | |
2988 | ;; found a character accepted as a line, move | |
2989 | ;; forward! | |
2990 | (while (and (> fuzziness 0) (not (memq c accept-set))) | |
2991 | (setq x-tmp (+ x-tmp step-x)) | |
2992 | (setq y-tmp (+ y-tmp step-y)) | |
2993 | (setq c (artist-get-char-at-xy-conv x-tmp y-tmp)) | |
2994 | (setq fuzziness (- fuzziness 1))) | |
2995 | (if (memq c accept-set) | |
2996 | ||
2997 | ;; The line continues on the other side of the | |
2998 | ;; not-accepted character. | |
2999 | (setq x x-tmp | |
3000 | y y-tmp) | |
3001 | ||
3002 | ;; Else: We couldn't find any line on the other side. | |
3003 | ;; That means we are done searching for the endpoint. | |
3004 | (setq done t))))))) | |
3005 | (cons x-last y-last))) | |
3006 | ||
3007 | ||
3008 | (defun artist-vap-find-endpoints-horiz (x y) | |
3009 | "Find endpoints for a horizontal line through X, Y. | |
3010 | An endpoint is a cons pair, (ENDPOINT-X . ENDPOINT-Y)." | |
3011 | (list (artist-vap-find-endpoint x y 1 0 '(?- ?+) '(? )) | |
3012 | (artist-vap-find-endpoint x y -1 0 '(?- ?+) '(? )))) | |
3013 | ||
3014 | (defun artist-vap-find-endpoints-vert (x y) | |
3015 | "Find endpoints for a vertical line through X, Y. | |
3016 | An endpoint is a cons pair, (ENDPOINT-X . ENDPOINT-Y)." | |
3017 | (list (artist-vap-find-endpoint x y 0 1 '(?| ?+) '(? )) | |
3018 | (artist-vap-find-endpoint x y 0 -1 '(?| ?+) '(? )))) | |
3019 | ||
3020 | (defun artist-vap-find-endpoints-swne (x y) | |
3021 | "Find endpoints for a diagonal line (made by /'s) through X, Y. | |
3022 | An endpoint is a cons pair, (ENDPOINT-X . ENDPOINT-Y)." | |
3023 | (list (artist-vap-find-endpoint x y 1 -1 '(?/ ?X) '(? )) | |
3024 | (artist-vap-find-endpoint x y -1 1 '(?/ ?X) '(? )))) | |
3025 | ||
3026 | (defun artist-vap-find-endpoints-nwse (x y) | |
3027 | "Find endpoints for a diagonal line (made by \\'s) through X, Y. | |
3028 | An endpoint is a cons pair, (ENDPOINT-X . ENDPOINT-Y)." | |
3029 | (list (artist-vap-find-endpoint x y 1 1 '(?\\ ?X) '(? )) | |
3030 | (artist-vap-find-endpoint x y -1 -1 '(?\\ ?X) '(? )))) | |
3031 | ||
3032 | ||
3033 | (defun artist-vap-find-endpoints (x y) | |
3034 | "Given a point X1, Y1, return a list of endpoints of lines through X, Y. | |
3035 | An endpoint is a cons pair, (ENDPOINT-X . ENDPOINT-Y)." | |
3036 | (if artist-line-char-set | |
3037 | nil | |
3038 | (let ((c (artist-get-char-at-xy-conv x y))) | |
3039 | (cond ((eq c ?-) (artist-vap-find-endpoints-horiz x y)) | |
3040 | ((eq c ?|) (artist-vap-find-endpoints-vert x y)) | |
3041 | ((eq c ?/) (artist-vap-find-endpoints-swne x y)) | |
3042 | ((eq c ?\\) (artist-vap-find-endpoints-nwse x y)) | |
3043 | ((eq c ?+) (append (artist-vap-find-endpoints-horiz x y) | |
3044 | (artist-vap-find-endpoints-vert x y))) | |
3045 | ((eq c ?X) (append (artist-vap-find-endpoints-swne x y) | |
3046 | (artist-vap-find-endpoints-nwse x y))) | |
3047 | ||
3048 | ;; We don't know how to find directions when we are on | |
3049 | ;; another character | |
3050 | (t nil))))) | |
3051 | ||
3052 | ||
3053 | (defun artist-vap-group-in-pairs (l) | |
3054 | "Group elements in list L in pairs." | |
3055 | (cond ((null l) nil) | |
3056 | ((null (cdr l)) l) ; unevent number of elements in list | |
3057 | (t (append (list (list (car l) (car (cdr l)))) | |
3058 | (artist-vap-group-in-pairs (cdr (cdr l))))))) | |
3059 | ||
3060 | (defun artist-vaporize-by-endpoints (endpoint1 endpoint2) | |
3061 | "Given ENDPOINT1 and ENDPOINT2, vaporize the line between them. | |
3062 | An endpoint is a pair (X . Y)." | |
3063 | (let* ((x1 (car endpoint1)) | |
3064 | (y1 (cdr endpoint1)) | |
3065 | (x2 (car endpoint2)) | |
3066 | (y2 (cdr endpoint2)) | |
3067 | (dir (artist-find-direction x1 y1 x2 y2)) | |
3068 | (x-step (aref [1 1 0 -1 -1 -1 0 1] dir)) | |
3069 | (y-step (aref [0 1 1 1 0 -1 -1 -1] dir)) | |
3070 | (line-c (aref [?- ?\\ ?| ?/ ?- ?\\ ?| ?/] dir)) | |
3071 | (line-len (elt (list (abs (- x2 x1)) | |
3072 | (abs (- x2 x1)) | |
3073 | (abs (- y2 y1)) | |
3074 | (abs (- y2 y1)) | |
3075 | (abs (- x1 x2)) | |
3076 | (abs (- x1 x2)) | |
3077 | (abs (- y1 y2)) | |
3078 | (abs (- y1 y2))) | |
3079 | dir)) | |
3080 | (x x1) | |
3081 | (y y1)) | |
3082 | (while (>= line-len 0) | |
3083 | (let* ((buffer-c (artist-get-char-at-xy-conv x y)) | |
3084 | (new-c (artist-unintersection-char line-c buffer-c))) | |
3085 | (artist-move-to-xy x y) | |
3086 | (artist-replace-char new-c)) | |
3087 | (setq x (+ x x-step) | |
3088 | y (+ y y-step) | |
3089 | line-len (- line-len 1))))) | |
3090 | ||
3091 | ||
3092 | (defun artist-vaporize-line (x1 y1) | |
3093 | "Vaporize (erase) the straight line through X1, Y1. | |
3094 | Do this by replacing the characters that forms the line with | |
3095 | `artist-erase-char'. Output is a list of endpoints for lines | |
3096 | through X1, Y1. An endpoint is a cons pair, (ENDPOINT-X . ENDPOINT-Y)." | |
3097 | (let ((endpoints (artist-vap-find-endpoints x1 y1))) | |
3098 | (mapcar | |
3099 | (lambda (endpoints) | |
3100 | (let ((ep1 (car endpoints)) | |
3101 | (ep2 (car (cdr endpoints)))) | |
3102 | (artist-vaporize-by-endpoints ep1 ep2))) | |
3103 | (artist-vap-group-in-pairs endpoints)) | |
3104 | endpoints)) | |
3105 | ||
3106 | ||
3107 | ;; Implementation note: This depends on artist-vaporize-line doing | |
3108 | ;; unintersections of intersecting lines. | |
3109 | ;; | |
3110 | ;; Example: | |
3111 | ;; Suppose the buffer looks like this and that we start vaporizing | |
3112 | ;; lines at (3,0) (at the ``*''). | |
3113 | ;; | |
3114 | ;; 0123456 | |
3115 | ;; 0+--*--+ | |
3116 | ;; 1| | | |
3117 | ;; 2| | | |
3118 | ;; 3+-----+ | |
3119 | ;; | |
3120 | ;; We will then push (0,0) and (6,0) on the stack, and vaporize the | |
3121 | ;; topmost horizontal line: | |
3122 | ;; | |
3123 | ;; 0123456 | |
3124 | ;; 0| | | |
3125 | ;; 1| | | |
3126 | ;; 2| | | |
3127 | ;; 3+-----+ | |
3128 | ;; | |
3129 | ;; We will then pop (0,0) and remove the left-most vertival line while | |
3130 | ;; pushing the lower left corner (0,3) on the stack, and so on until | |
3131 | ;; the entire rectangle is vaporized. | |
3132 | ;; | |
3133 | ;; Now, What if the `+' in the upper left and upper right corners, | |
3134 | ;; had not been changed to `|' but to spaces instead? We would | |
3135 | ;; have failed when popping (0,0) and vaporizing that line because | |
3136 | ;; we wouldn't find any line at (0,0): | |
3137 | ;; | |
3138 | ;; 0123456 | |
3139 | ;; 0 | |
3140 | ;; 1| | | |
3141 | ;; 2| | | |
3142 | ;; 3+-----+ | |
3143 | ;; | |
3144 | ;; That's why we depend on artist-vaporize-line doing unintersecting | |
3145 | ;; of crossing lines. There are alternative ways to handle this | |
3146 | ;; if it becomes too much a trouble. | |
3147 | ;; | |
3148 | (defun artist-vaporize-lines (x1 y1) | |
3149 | "Vaporize lines reachable from point X1, Y1." | |
3150 | (let ((ep-stack nil)) | |
3151 | (mapcar | |
3152 | (lambda (ep) (artist-push ep ep-stack)) | |
3153 | (artist-vap-find-endpoints x1 y1)) | |
3154 | (while (not (null ep-stack)) | |
3155 | (let* ((vaporize-point (artist-pop ep-stack)) | |
3156 | (new-endpoints (artist-vaporize-line (car vaporize-point) | |
3157 | (cdr vaporize-point)))) | |
3158 | (mapcar | |
3159 | (lambda (endpoint) (artist-push endpoint ep-stack)) | |
3160 | new-endpoints))))) | |
3161 | ||
3162 | ||
3163 | ;; | |
3164 | ;; Circles and ellipses | |
3165 | ;; | |
3166 | (defun artist-ellipse-generate-quadrant (x-radius y-radius) | |
3167 | "Create a point-list for first quadrant. | |
3168 | Points go from (X-RADIUS, 0) to (0, Y-RADIUS). | |
3169 | Quadrant is generated around origo." | |
3170 | (let* ((rx2 (* x-radius x-radius)) | |
3171 | (ry2 (* y-radius y-radius)) | |
3172 | (2rx2 (* 2 rx2)) | |
3173 | (2ry2 (* 2 ry2)) | |
3174 | (p) | |
3175 | (x 0) | |
3176 | (y y-radius) | |
3177 | (px 0) | |
3178 | (py (* 2rx2 y)) | |
3179 | (point-list nil)) | |
3180 | (artist-put-pixel point-list x y) | |
3181 | (setq p (round (+ ry2 (- (* rx2 y-radius)) (* 0.25 rx2)))) | |
3182 | (while (< px py) | |
3183 | (setq x (1+ x) | |
3184 | px (+ px 2ry2)) | |
3185 | (if (< p 0) | |
3186 | (setq p (+ p ry2 px)) | |
3187 | (setq y (- y 1) | |
3188 | py (- py 2rx2) | |
3189 | p (+ p ry2 px (- py)))) | |
3190 | (artist-put-pixel point-list x y)) | |
3191 | (setq p (round (+ (* ry2 (+ x 0.5) (+ x 0.5)) | |
3192 | (* rx2 (- y 1) (- y 1)) | |
3193 | (- (* rx2 ry2))))) | |
3194 | (while (> y 0) | |
3195 | (setq y (- y 1) | |
3196 | py (- py 2rx2)) | |
3197 | (if (> p 0) | |
3198 | (setq p (+ p rx2 (- py))) | |
3199 | (setq x (1+ x) | |
3200 | px (+ px 2ry2) | |
3201 | p (+ p rx2 (- py) px))) | |
3202 | (artist-put-pixel point-list x y)) | |
3203 | point-list)) | |
3204 | ||
3205 | (defsubst artist-new-fill-item (x y width) | |
3206 | "Create a new item at X, Y, with WIDTH. | |
3207 | This is for use in fill-info in ellipses and circles." | |
3208 | (let ((new-item (make-vector 3 x))) | |
3209 | (aset new-item 1 y) | |
3210 | (aset new-item 2 width) | |
3211 | new-item)) | |
3212 | ||
3213 | (defsubst artist-fill-item-get-x (fill-item) | |
3214 | "Retrieve the x component of a FILL-ITEM." | |
3215 | (aref fill-item 0)) | |
3216 | ||
3217 | (defsubst artist-fill-item-set-x (fill-item new-x) | |
3218 | "Set the x component of a FILL-ITEM to NEW-X." | |
3219 | (aset fill-item 0 new-x) | |
3220 | fill-item) | |
3221 | ||
3222 | (defsubst artist-fill-item-get-y (fill-item) | |
3223 | "Retrieve the y component of a FILL-ITEM." | |
3224 | (aref fill-item 1)) | |
3225 | ||
3226 | (defsubst artist-fill-item-set-y (fill-item new-y) | |
3227 | "Set the y component of a FILL-ITEM to NEW-Y." | |
3228 | (aset fill-item 1 new-y) | |
3229 | fill-item) | |
3230 | ||
3231 | (defsubst artist-fill-item-get-width (fill-item) | |
3232 | "Retrieve the width component of a FILL-ITEM." | |
3233 | (aref fill-item 2)) | |
3234 | ||
3235 | (defsubst artist-fill-item-set-width (fill-item new-width) | |
3236 | "Set the width component of a FILL-ITEM to NEW-WIDTH." | |
3237 | (aset fill-item 2 new-width) | |
3238 | fill-item) | |
3239 | ||
3240 | ||
3241 | (defun artist-ellipse-point-list-add-center (x-center y-center point-list) | |
3242 | "Add offsets X-CENTER and Y-CENTER to coordinates in POINT-LIST." | |
3243 | (mapcar | |
3244 | (lambda (p) | |
3245 | (artist-coord-set-x p (+ x-center (artist-coord-get-x p))) | |
3246 | (artist-coord-set-y p (+ y-center (artist-coord-get-y p)))) | |
3247 | point-list)) | |
3248 | ||
3249 | ||
3250 | (defun artist-ellipse-fill-info-add-center (x-center y-center fill-info) | |
3251 | "Add offsets X-CENTER and Y-CENTER to fill-items in FILL-INFO." | |
3252 | (mapcar | |
3253 | (lambda (p) | |
3254 | (artist-fill-item-set-x p (+ x-center (artist-fill-item-get-x p))) | |
3255 | (artist-fill-item-set-y p (+ y-center (artist-fill-item-get-y p)))) | |
3256 | fill-info)) | |
3257 | ||
3258 | (defun artist-ellipse-remove-0-fills (fill-info) | |
3259 | "Remove fill-infos from FILL-INFO that fills a zero-width field." | |
3260 | (cond ((null fill-info) | |
3261 | nil) | |
3262 | ((= 0 (artist-fill-item-get-width (car fill-info))) | |
3263 | (artist-ellipse-remove-0-fills (cdr fill-info))) | |
3264 | (t | |
3265 | (append (list (car fill-info)) | |
3266 | (artist-ellipse-remove-0-fills (cdr fill-info)))))) | |
3267 | ||
3268 | ||
3269 | (defun artist-ellipse-compute-fill-info (point-list) | |
3270 | "Compute fill info for ellipse around 0,0 from POINT-LIST. | |
3271 | The POINT-LIST is expected to cover the first quadrant." | |
3272 | (let ((first-half nil) | |
3273 | (both-halves nil) | |
3274 | (last-y nil)) | |
3275 | ||
3276 | ;; Create first half (the lower one (since y grows downwards)) from | |
3277 | ;; the first quadrant. | |
3278 | (mapcar | |
3279 | (lambda (coord) | |
3280 | (let* ((x (artist-coord-get-x coord)) | |
3281 | (y (artist-coord-get-y coord)) | |
3282 | (width (max (- (* 2 x) 1) 0)) | |
3283 | (left-edge (- x width))) | |
3284 | (if (or (null last-y) (not (= y last-y))) | |
3285 | ;; This was either the first time, | |
3286 | ;; or it was the first time on a new line | |
3287 | (setq first-half | |
3288 | (append first-half | |
3289 | ;; Fill info item starts at left-edge on line y | |
3290 | (list (artist-new-fill-item left-edge y width))))) | |
3291 | (setq last-y y))) | |
3292 | point-list) | |
3293 | ||
3294 | ;; Create the other half by mirroring the first half. | |
3295 | (setq both-halves | |
3296 | (append first-half | |
3297 | (mapcar | |
3298 | (lambda (i) | |
3299 | (artist-new-fill-item (artist-fill-item-get-x i) | |
3300 | (- (artist-fill-item-get-y i)) | |
3301 | (artist-fill-item-get-width i))) | |
3302 | ;; The cdr below is so we don't include fill-info for | |
3303 | ;;; the middle line twice | |
3304 | (cdr (reverse first-half))))) | |
3305 | (artist-ellipse-remove-0-fills both-halves))) | |
3306 | ||
3307 | ||
3308 | (defun artist-ellipse-mirror-quadrant (point-list) | |
3309 | "Mirror a POINT-LIST describing first quadrant to create a complete ellipse." | |
3310 | (let ((right-half nil) | |
3311 | (left-half nil)) | |
3312 | ||
3313 | ;; First, if last char in that quadrant is `/', then replace it with `)' | |
3314 | ;; This way we avoids things | |
3315 | ;; --------- --------- | |
3316 | ;; / \ / \ | |
3317 | ;; that look like: \ / instead we get: ( ) | |
3318 | ;; \ / \ / | |
3319 | ;; --------- --------- | |
3320 | (let ((last-coord (artist-last point-list))) | |
3321 | (if (= (artist-coord-get-new-char last-coord) ?/) | |
3322 | (artist-coord-set-new-char last-coord artist-ellipse-right-char))) | |
3323 | ||
3324 | ;; Create the other part of the right half by mirroring the first part | |
3325 | (setq right-half | |
3326 | (append | |
3327 | point-list | |
3328 | (mapcar | |
3329 | (lambda (coord) | |
3330 | (let ((c (artist-coord-get-new-char coord))) | |
3331 | (artist-new-coord (artist-coord-get-x coord) | |
3332 | (- (artist-coord-get-y coord)) | |
3333 | (cond ((= c ?/) ?\\) | |
3334 | ((= c ?\\) ?/) | |
3335 | (t c))))) | |
3336 | ;; The cdr below is so we don't draw the middle right char twice | |
3337 | (cdr (reverse point-list))))) | |
3338 | ||
3339 | ;; Create the left half by mirroring the right half. | |
3340 | (setq left-half | |
3341 | (mapcar | |
3342 | (lambda (coord) | |
3343 | (let ((c (artist-coord-get-new-char coord))) | |
3344 | (artist-new-coord (- (artist-coord-get-x coord)) | |
3345 | (artist-coord-get-y coord) | |
3346 | (cond ((= c ?/) ?\\) | |
3347 | ((= c ?\\) ?/) | |
3348 | ((= c artist-ellipse-right-char) | |
3349 | artist-ellipse-left-char) | |
3350 | (t c))))) | |
3351 | ;; The cdr and butlast below is so we don't draw the middle top | |
3352 | ;; and middle bottom char twice. | |
3353 | (artist-butlast (cdr (reverse right-half))))) | |
3354 | (append right-half left-half))) | |
3355 | ||
3356 | ||
3357 | (defun artist-draw-ellipse-general (x y x-radius y-radius) | |
3358 | "Draw an ellipse with center at X, Y and X-RADIUS and Y-RADIUS. | |
3359 | ||
3360 | Output is an ellipse, which is a list (END-POINT-1 END-POINT-2 SHAPE-INFO). | |
3361 | ||
3362 | END-POINT-1 and END-POINT-2 are two-element vectors on the form [X Y]. | |
3363 | SHAPE-INFO is a two-element vector on the form [POINT-LIST FILL-INFO]. | |
3364 | ||
3365 | POINT-LIST is a list of vectors on the form [X Y SAVED-CHAR NEW-CHAR]. | |
3366 | FILL-INFO is a list of vectors on the form [X Y ELLIPSE-WIDTH-ON-THIS-LINE]. | |
3367 | ||
3368 | Ellipses with zero y-radius are not drawn correctly." | |
3369 | (let* ((point-list (artist-ellipse-generate-quadrant x-radius y-radius)) | |
3370 | (fill-info (artist-ellipse-compute-fill-info point-list)) | |
3371 | (shape-info (make-vector 2 0))) | |
3372 | ||
3373 | (setq point-list (artist-calculate-new-chars point-list)) | |
3374 | (setq point-list (artist-ellipse-mirror-quadrant point-list)) | |
3375 | (setq point-list (artist-ellipse-point-list-add-center x y point-list)) | |
3376 | (setq fill-info (artist-ellipse-fill-info-add-center x y fill-info)) | |
3377 | ||
3378 | ;; Draw the ellipse | |
3379 | (setq point-list | |
3380 | (mapcar | |
3381 | (lambda (coord) | |
3382 | (artist-move-to-xy (artist-coord-get-x coord) | |
3383 | (artist-coord-get-y coord)) | |
3384 | (if artist-line-char-set | |
3385 | (artist-replace-char artist-line-char) | |
3386 | (artist-replace-char (artist-coord-get-new-char coord))) | |
3387 | coord) | |
3388 | (artist-modify-new-chars | |
3389 | (artist-save-chars-under-point-list point-list)))) | |
3390 | ||
3391 | (aset shape-info 0 point-list) | |
3392 | (aset shape-info 1 fill-info) | |
3393 | (artist-make-2point-object (artist-make-endpoint x y) | |
3394 | (artist-make-endpoint x-radius y-radius) | |
3395 | shape-info))) | |
3396 | ||
3397 | (defun artist-draw-ellipse-with-0-height (x y x-radius y-radius) | |
3398 | "Draw an ellipse with center at X, Y and X-RADIUS and Y-RADIUS. | |
3399 | ||
3400 | Output is an ellipse, which is a list (END-POINT-1 END-POINT-2 SHAPE-INFO). | |
3401 | ||
3402 | END-POINT-1 and END-POINT-2 are two-element vectors on the form [X Y]. | |
3403 | SHAPE-INFO is a two-element vector on the form [POINT-LIST FILL-INFO]. | |
3404 | ||
3405 | POINT-LIST is a list of vectors on the form [X Y SAVED-CHAR NEW-CHAR]. | |
3406 | FILL-INFO is a list of vectors on the form [X Y ELLIPSE-WIDTH-ON-THIS-LINE]. | |
3407 | ||
3408 | The Y-RADIUS must be 0, but the X-RADUIS must not be 0." | |
3409 | (let ((point-list nil) | |
3410 | (width (max (- (abs (* 2 x-radius)) 1))) | |
3411 | (left-edge (1+ (- x (abs x-radius)))) | |
3412 | (line-char (if artist-line-char-set artist-line-char ?-)) | |
3413 | (i 0) | |
3414 | (point-list nil) | |
3415 | (fill-info nil) | |
3416 | (shape-info (make-vector 2 0))) | |
3417 | (while (< i width) | |
3418 | (let* ((line-x (+ left-edge i)) | |
3419 | (line-y y) | |
3420 | (new-coord (artist-new-coord line-x line-y))) | |
3421 | (artist-coord-add-saved-char new-coord | |
3422 | (artist-get-char-at-xy line-x line-y)) | |
3423 | (artist-move-to-xy line-x line-y) | |
3424 | (artist-replace-char line-char) | |
3425 | (setq point-list (append point-list (list new-coord))) | |
3426 | (setq i (1+ i)))) | |
3427 | (aset shape-info 0 point-list) | |
3428 | (aset shape-info 1 fill-info) | |
3429 | (artist-make-2point-object (artist-make-endpoint x y) | |
3430 | (artist-make-endpoint x-radius y-radius) | |
3431 | shape-info))) | |
3432 | ||
3433 | (defun artist-draw-ellipse (x1 y1 x2 y2) | |
3434 | "Draw an ellipse with center at X1, Y1 and point X2,Y2. | |
3435 | ||
3436 | Output is an ellipse, which is a list (END-POINT-1 END-POINT-2 SHAPE-INFO). | |
3437 | ||
3438 | END-POINT-1 and END-POINT-2 are two-element vectors on the form [X Y]. | |
3439 | SHAPE-INFO is a two-element vector on the form [POINT-LIST FILL-INFO]. | |
3440 | ||
3441 | POINT-LIST is a list of vectors on the form [X Y SAVED-CHAR NEW-CHAR]. | |
3442 | FILL-INFO is a list of vectors on the form [X Y ELLIPSE-WIDTH-ON-THIS-LINE]." | |
3443 | (let* ((artist-line-char (artist-compute-line-char)) | |
3444 | (artist-line-char-set artist-line-char) | |
3445 | (width (abs (- x2 x1))) | |
3446 | (height (abs (- y2 y1))) | |
3447 | ;; | |
3448 | ;; When we draw our ellipse, we want it to go through the cursor | |
3449 | ;; position, but since x1,y1, x2,y2 marks the corners of one | |
3450 | ;; of the quadrants, we have to enlarge the ellipse a bit. | |
3451 | ;; Ok, so then why by sqrt(2)? | |
3452 | ;; It comes from the equation for the ellipse (where a is the | |
3453 | ;; x-radius and b is the y-radius): | |
3454 | ;; f(x,y) = x^2 / a^2 + y^2 / b^2 - 1 = 0 | |
3455 | ;; and the fact that we want the enlarged ellipse to have the | |
3456 | ;; same proportions as the smaller square, therefore we have: | |
3457 | ;; a/b = x/y | |
3458 | ;; Solving this yields a-in-larger-ellipse = a-in-smaller * sqrt(2) | |
3459 | (x-radius (round (* width (sqrt 2)))) | |
3460 | (y-radius (round (* height (sqrt 2)))) | |
3461 | (x x1) | |
3462 | (y y1)) | |
3463 | (if (and (= y1 y2) (not (= x1 x2))) | |
3464 | (artist-draw-ellipse-with-0-height x y x-radius y-radius) | |
3465 | (artist-draw-ellipse-general x y x-radius y-radius)))) | |
3466 | ||
3467 | ||
3468 | (defun artist-undraw-ellipse (ellipse) | |
3469 | "Undraw ELLIPSE." | |
3470 | (if ellipse | |
3471 | (let ((point-list (aref (artist-2point-get-shapeinfo ellipse) 0))) | |
3472 | (mapcar | |
3473 | (lambda (coord) | |
3474 | (artist-move-to-xy (artist-coord-get-x coord) | |
3475 | (artist-coord-get-y coord)) | |
3476 | (artist-replace-char (artist-coord-get-saved-char coord)) | |
3477 | coord) | |
3478 | point-list)))) | |
3479 | ||
3480 | ||
3481 | (defun artist-draw-circle (x1 y1 x2 y2) | |
3482 | "Draw a circle with center at X1, Y1 and point X2,Y2. | |
3483 | ||
3484 | Output is an ellipse, which is a list (END-POINT-1 END-POINT-2 SHAPE-INFO). | |
3485 | ||
3486 | END-POINT-1 and END-POINT-2 are two-element vectors on the form [X Y]. | |
3487 | SHAPE-INFO is a two-element vector on the form [POINT-LIST FILL-INFO]. | |
3488 | ||
3489 | POINT-LIST is a list of vectors on the form [X Y SAVED-CHAR NEW-CHAR]. | |
3490 | FILL-INFO is a list of vectors on the form [X Y ELLIPSE-WIDTH-ON-THIS-LINE]." | |
3491 | (let* ((artist-line-char (artist-compute-line-char)) | |
3492 | (artist-line-char-set artist-line-char) | |
3493 | (width (abs (- x2 x1))) | |
3494 | (height (abs (- y2 y1))) | |
3495 | ;; When drawing our circle, we want it to through the cursor | |
3496 | ;; just as when drawing the ellispe, but we have to take | |
3497 | ;; care for the aspect-ratio. | |
3498 | ;; The equation for the ellipse (where a is the x-radius and | |
3499 | ;; b is the y-radius): | |
3500 | ;; f(x,y) = x^2 / a^2 + y^2 / b^2 - 1 = 0 | |
3501 | ;; together with the relationship | |
3502 | ;; a = aspect-ratio * b | |
3503 | ;; gives | |
3504 | ;; a = sqrt( x^2 + (aspect-ratio * y)^2 ) and | |
3505 | ;; b = a / aspect-ratio | |
3506 | (x-radius (round (sqrt (+ (* width width) | |
3507 | (* (* artist-aspect-ratio height) | |
3508 | (* artist-aspect-ratio height)))))) | |
3509 | (y-radius (round (/ x-radius artist-aspect-ratio)))) | |
3510 | (artist-draw-ellipse-general x1 y1 x-radius y-radius))) | |
3511 | ||
3512 | (defalias 'artist-undraw-circle 'artist-undraw-ellipse) | |
3513 | ||
3514 | ||
3515 | ; | |
3516 | ; Filling ellipses | |
3517 | ; | |
3518 | (defun artist-fill-ellipse (ellipse x y x-radius y-radius) | |
3519 | "Fill an ELLIPSE centered at X,Y with radius X-RADIUS and Y-RADIUS." | |
3520 | (let ((fill-info (aref (artist-2point-get-shapeinfo ellipse) 1))) | |
3521 | (mapcar | |
3522 | (lambda (fill-item) | |
3523 | (artist-move-to-xy (artist-fill-item-get-x fill-item) | |
3524 | (artist-fill-item-get-y fill-item)) | |
3525 | (artist-replace-chars artist-fill-char | |
3526 | (artist-fill-item-get-width fill-item)) | |
3527 | fill-item) | |
3528 | fill-info))) | |
3529 | ||
3530 | (defalias 'artist-fill-circle 'artist-fill-ellipse) | |
3531 | ||
3532 | ||
3533 | ;; | |
3534 | ;; Cutting, copying and pasting rectangles and squares | |
3535 | ;; (filling functions) | |
3536 | ;; | |
3537 | ||
3538 | (defun artist-cut-rect (rect x1 y1 x2 y2) | |
3539 | "Copy rectangle RECT drawn from X1, Y1 to X2, Y2, then clear it." | |
3540 | (artist-undraw-rect rect) | |
3541 | (artist-copy-generic x1 y1 x2 y2) | |
3542 | (artist-erase-rect rect x1 y1 x2 y2)) | |
3543 | ||
3544 | (defun artist-cut-square (square x1 y1 x2 y2) | |
3545 | "Copy a SQUARE drawn from X1, Y1 to X2, Y2 (made square), then clears it." | |
3546 | (artist-undraw-square square) | |
3547 | (let* ((square-corners (artist-rect-corners-squarify x1 y1 x2 y2)) | |
3548 | (new-x1 (elt square-corners 0)) | |
3549 | (new-y1 (elt square-corners 1)) | |
3550 | (new-x2 (elt square-corners 2)) | |
3551 | (new-y2 (elt square-corners 3))) | |
3552 | (artist-copy-generic new-x1 new-y1 new-x2 new-y2) | |
3553 | (artist-erase-rect square new-x1 new-y1 new-x2 new-y2))) | |
3554 | ||
3555 | ||
3556 | (defun artist-get-buffer-contents-at-xy (x y width) | |
3557 | "Retrieve contents from the buffer at X, Y. WIDTH characters are returned." | |
3558 | (artist-move-to-xy x y) | |
3559 | (let ((here (point)) | |
3560 | (there (save-excursion (artist-move-to-xy (+ x width) y) (point)))) | |
3561 | (untabify here there) | |
3562 | (setq there (save-excursion (artist-move-to-xy (+ x width) y) (point))) | |
3563 | (buffer-substring here there))) | |
3564 | ||
3565 | ||
3566 | (defun artist-copy-generic (x1 y1 x2 y2) | |
3567 | "Copy a rectangular area with corners at X1, Y1 and X2, Y2. | |
3568 | Output is a copy buffer, a list of strings, representing the | |
3569 | original contents of that area in the buffer." | |
3570 | (let* ((x (min x1 x2)) | |
3571 | (y (min y1 y2)) | |
3572 | (x-max (max x1 x2)) | |
3573 | (y-max (max y1 y2)) | |
3574 | (w (+ (- x-max x) 1)) | |
3575 | (l nil)) | |
3576 | (while (<= y y-max) | |
3577 | (setq l (cons (artist-get-buffer-contents-at-xy x y w) l)) | |
3578 | (setq y (1+ y))) | |
3579 | (if artist-interface-with-rect | |
3580 | (setq killed-rectangle (reverse l)) | |
3581 | (setq artist-copy-buffer (reverse l))))) | |
3582 | ||
3583 | ||
3584 | (defun artist-copy-rect (rect x1 y1 x2 y2) | |
3585 | "Copy rectangle RECT drawn from X1, Y1 to X2, Y2." | |
3586 | (artist-undraw-rect rect) | |
3587 | (artist-copy-generic x1 y1 x2 y2)) | |
3588 | ||
3589 | (defun artist-copy-square (square x1 y1 x2 y2) | |
3590 | "Copies a SQUARE drawn from X1, Y1 to X2, Y2 (but made square)." | |
3591 | (artist-undraw-square square) | |
3592 | (let* ((square-corners (artist-rect-corners-squarify x1 y1 x2 y2)) | |
3593 | (new-x1 (elt square-corners 0)) | |
3594 | (new-y1 (elt square-corners 1)) | |
3595 | (new-x2 (elt square-corners 2)) | |
3596 | (new-y2 (elt square-corners 3))) | |
3597 | (artist-copy-generic new-x1 new-y1 new-x2 new-y2))) | |
3598 | ||
3599 | (defun artist-paste (x y) | |
3600 | "Pastes the contents of the copy-buffer at X,Y." | |
3601 | (let ((copy-buf (if artist-interface-with-rect | |
3602 | killed-rectangle | |
3603 | artist-copy-buffer))) | |
3604 | (if (not (null copy-buf)) | |
3605 | (while (not (null copy-buf)) | |
3606 | (artist-move-to-xy x y) | |
3607 | (artist-replace-string (car copy-buf)) | |
3608 | (setq copy-buf (cdr copy-buf)) | |
3609 | (setq y (1+ y))) | |
3610 | (message "Nothing to paste")))) | |
3611 | ||
3612 | ||
3613 | ;; | |
3614 | ;; Flood filling | |
3615 | ;; | |
3616 | (defun artist-ff-too-far-right (x) | |
3617 | "Determine if the position X is too far to the right." | |
3618 | (cond ((numberp artist-flood-fill-right-border) | |
3619 | (> x artist-flood-fill-right-border)) | |
3620 | ((eq artist-flood-fill-right-border 'window-width) | |
3621 | (> x (- (window-width) 2))) | |
3622 | ((eq artist-flood-fill-right-border 'fill-column) | |
3623 | (> x fill-column)) | |
3624 | (t (error "Invalid value for `artist-flood-fill-right-border'")))) | |
3625 | ||
3626 | (defun artist-ff-get-rightmost-from-xy (x y) | |
3627 | "Find the rightmost position in this run, starting at X, Y." | |
3628 | (save-excursion | |
3629 | (let ((char-at-xy (artist-get-char-at-xy-conv x y)) | |
3630 | (last-x x)) | |
3631 | (setq x (1+ x)) | |
3632 | (while (and (not (artist-ff-too-far-right x)) | |
3633 | (= char-at-xy (artist-get-char-at-xy-conv x y))) | |
3634 | (setq last-x x) | |
3635 | (setq x (1+ x))) | |
3636 | last-x))) | |
3637 | ||
3638 | (defun artist-ff-is-topmost-line (x y) | |
3639 | "Determine whether the position X,Y is on the topmost line or not." | |
3640 | (= y 0)) | |
3641 | ||
3642 | (defun artist-ff-is-bottommost-line (x y) | |
3643 | "Determine whether the position X,Y is on the bottommost line or not." | |
3644 | (save-excursion | |
3645 | (goto-char (point-max)) | |
3646 | (beginning-of-line) | |
3647 | (let ((last-line (artist-current-line))) | |
3648 | (if (= (point) (point-max)) | |
3649 | ||
3650 | ;; Last line is empty, don't paint on it, report previous line | |
3651 | ;; as last line | |
3652 | (>= y (- last-line 1))) | |
3653 | (>= y last-line)))) | |
3654 | ||
3655 | ||
3656 | (defun artist-flood-fill (x1 y1) | |
3657 | "Flood-fill starting at X1, Y1. Fill with the char in `artist-fill-char'." | |
3658 | (let ((stack nil) | |
3659 | (input-queue nil) | |
3660 | ;; We are flood-filling the area that has this character. | |
3661 | (c (artist-get-char-at-xy-conv x1 y1)) | |
3662 | (artist-fill-char (if artist-fill-char-set | |
3663 | artist-fill-char | |
3664 | artist-default-fill-char))) | |
3665 | ||
3666 | ;; Fill only if the fill-char is not the same as the character whose | |
3667 | ;; area we are about to fill, or, in other words, don't fill if we | |
3668 | ;; needn't. | |
3669 | (if (not (= c artist-fill-char)) | |
3670 | (artist-push (artist-new-coord x1 y1) stack)) | |
3671 | ||
3672 | (while (not (null stack)) | |
3673 | (let* ((coord (artist-pop stack)) | |
3674 | (x (artist-coord-get-x coord)) | |
3675 | (y (artist-coord-get-y coord)) | |
3676 | ||
3677 | ;; Here we keep track of the leftmost and rightmost position | |
3678 | ;; for this run | |
3679 | (x-leftmost 0) | |
3680 | (x-rightmost 0) | |
3681 | (last-x 0) | |
3682 | ||
3683 | ;; Remember if line above and below are accessible | |
3684 | ;; Lines below the last one, and prior to the first-one | |
3685 | ;; are not accessible. | |
3686 | (lines-above nil) | |
3687 | (lines-below nil) | |
3688 | ||
3689 | ;; Remember char for position on line above and below, so we | |
3690 | ;; can find the rightmost positions on the runs. | |
3691 | (last-c-above -1) | |
3692 | (last-c-below -1)) | |
3693 | ||
3694 | (setq x-rightmost (artist-ff-get-rightmost-from-xy x y)) | |
3695 | (setq lines-above (not (artist-ff-is-topmost-line x y))) | |
3696 | (setq lines-below (not (artist-ff-is-bottommost-line x y))) | |
3697 | (setq last-x x-rightmost) | |
3698 | (setq x x-rightmost) | |
3699 | ||
3700 | ;; Search line above, push rightmost positions of runs for that line | |
3701 | (while (and (>= x 0) (= c (artist-get-char-at-xy-conv x y))) | |
3702 | (if lines-above | |
3703 | (let ((c-above (artist-get-char-at-xy-conv x (- y 1)))) | |
3704 | (if (and (= c-above c) (/= c-above last-c-above)) | |
3705 | (artist-push (artist-new-coord x (- y 1)) stack)) | |
3706 | (setq last-c-above c-above))) | |
3707 | (setq last-x x) | |
3708 | (setq x (- x 1))) | |
3709 | ||
3710 | ;; Remember the left-most position on this run | |
3711 | (setq x-leftmost last-x) | |
3712 | ||
3713 | ;; Search line below, push rightmost positions of runs for that line | |
3714 | (setq x x-rightmost) | |
3715 | (while (>= x x-leftmost) | |
3716 | (if lines-below | |
3717 | (let ((c-below (artist-get-char-at-xy-conv x (1+ y)))) | |
3718 | (if (and (= c-below c) (/= c-below last-c-below)) | |
3719 | (artist-push (artist-new-coord x (1+ y)) stack)) | |
3720 | (setq last-c-below c-below))) | |
3721 | (setq x (- x 1))) | |
3722 | ||
3723 | (artist-move-to-xy x-leftmost y) | |
3724 | (artist-replace-chars artist-fill-char (1+ (- x-rightmost x-leftmost))) | |
3725 | ||
3726 | ;; If we are to show incrementally, we have to remove any pending | |
3727 | ;; input from the input queue, because processing of pending input | |
3728 | ;; always has priority over display updates (although this input | |
3729 | ;; won't be processed until we are done). Later on we will queue | |
3730 | ;; the input on the input queue again. | |
3731 | (if artist-flood-fill-show-incrementally | |
3732 | (progn | |
3733 | (if (input-pending-p) | |
3734 | (discard-input)) | |
3735 | (artist-update-display))))))) | |
3736 | ||
3737 | ;; | |
3738 | ;; Accessors to arrow-points | |
3739 | ;; | |
3740 | ||
3741 | (defun artist-make-arrow-point (x y direction &optional state) | |
3742 | "Create an arrow point at X, Y for a line in direction DIRECTION. | |
3743 | Optional argument STATE can be used to set state (default is nil)." | |
3744 | (save-excursion | |
3745 | (let* ((arrow-point (make-vector 4 0)) | |
3746 | (arrow-marker (make-marker))) | |
3747 | (artist-move-to-xy x y) | |
3748 | (set-marker arrow-marker (point)) | |
3749 | (aset arrow-point 0 arrow-marker) | |
3750 | (aset arrow-point 1 (artist-get-char-at-xy x y)) | |
3751 | (aset arrow-point 2 direction) | |
3752 | (aset arrow-point 3 state) | |
3753 | arrow-point))) | |
3754 | ||
3755 | (defsubst artist-arrow-point-get-marker (arrow-point) | |
3756 | "Retrieve the marker component of an ARROW-POINT." | |
3757 | (aref arrow-point 0)) | |
3758 | ||
3759 | (defsubst artist-arrow-point-get-orig-char (arrow-point) | |
3760 | "Retrieve the orig char component of an ARROW-POINT." | |
3761 | (aref arrow-point 1)) | |
3762 | ||
3763 | (defsubst artist-arrow-point-get-direction (arrow-point) | |
3764 | "Retrieve the direction component of an ARROW-POINT." | |
3765 | (aref arrow-point 2)) | |
3766 | ||
3767 | (defsubst artist-arrow-point-get-state (arrow-point) | |
3768 | "Retrieve the state component of an ARROW-POINT." | |
3769 | (aref arrow-point 3)) | |
3770 | ||
3771 | (defsubst artist-arrow-point-set-state (arrow-point new-state) | |
3772 | "Set the state component of an ARROW-POINT to NEW-STATE." | |
3773 | (aset arrow-point 3 new-state)) | |
3774 | ||
3775 | ||
3776 | (defun artist-clear-arrow-points () | |
3777 | "Clear current endpoints." | |
3778 | (setq artist-arrow-point-1 nil) | |
3779 | (setq artist-arrow-point-2 nil)) | |
3780 | ||
3781 | (defun artist-set-arrow-points-for-poly (point-list) | |
3782 | "Generic function for setting arrow-points for poly-shapes from POINT-LIST." | |
3783 | (let* ((ep1 (elt point-list 0)) | |
3784 | (ep2 (elt point-list 1)) | |
3785 | (x1 (artist-endpoint-get-x ep1)) | |
3786 | (y1 (artist-endpoint-get-y ep1)) | |
3787 | (x2 (artist-endpoint-get-x ep2)) | |
3788 | (y2 (artist-endpoint-get-y ep2)) | |
3789 | (dir1 (artist-find-direction x2 y2 x1 y1)) | |
3790 | (epn (artist-last point-list)) | |
3791 | (epn-1 (artist-last point-list 2)) | |
3792 | (xn (artist-endpoint-get-x epn)) | |
3793 | (yn (artist-endpoint-get-y epn)) | |
3794 | (xn-1 (artist-endpoint-get-x epn-1)) | |
3795 | (yn-1 (artist-endpoint-get-y epn-1)) | |
3796 | (dirn (artist-find-direction xn-1 yn-1 xn yn))) | |
3797 | (setq artist-arrow-point-1 (artist-make-arrow-point x1 y1 dir1)) | |
3798 | (setq artist-arrow-point-2 (artist-make-arrow-point xn yn dirn)))) | |
3799 | ||
3800 | ||
3801 | (defun artist-set-arrow-points-for-2points (shape x1 y1 x2 y2) | |
3802 | "Generic function for setting arrow-points for 2-point shapes. | |
3803 | The 2-point shape SHAPE is drawn from X1, Y1 to X2, Y2." | |
3804 | (let* ((endpoint1 (artist-2point-get-endpoint1 shape)) | |
3805 | (endpoint2 (artist-2point-get-endpoint2 shape)) | |
3806 | (x1 (artist-endpoint-get-x endpoint1)) | |
3807 | (y1 (artist-endpoint-get-y endpoint1)) | |
3808 | (x2 (artist-endpoint-get-x endpoint2)) | |
3809 | (y2 (artist-endpoint-get-y endpoint2))) | |
3810 | (setq artist-arrow-point-1 | |
3811 | (artist-make-arrow-point x1 y1 | |
3812 | (artist-find-direction x2 y2 x1 y1))) | |
3813 | (setq artist-arrow-point-2 | |
3814 | (artist-make-arrow-point x2 y2 | |
3815 | (artist-find-direction x1 y1 x2 y2))))) | |
3816 | ||
3817 | ||
3818 | ;; | |
3819 | ;; Common routine for drawing/undrawing shapes based | |
3820 | ;; on the draw-how | |
3821 | ;; | |
3822 | ||
3823 | (defun artist-key-undraw-continously (x y) | |
3824 | "Undraw current continous shape with point at X, Y." | |
3825 | ;; No undraw-info for continous shapes | |
3826 | nil) | |
3827 | ||
3828 | (defun artist-key-undraw-poly (x y) | |
3829 | "Undraw current poly shape with point at X, Y." | |
3830 | (let ((undraw-fn (artist-go-get-undraw-fn-from-symbol artist-curr-go)) | |
3831 | (x1 (artist-endpoint-get-x artist-key-endpoint1)) | |
3832 | (y1 (artist-endpoint-get-y artist-key-endpoint1))) | |
3833 | (artist-funcall undraw-fn artist-key-shape))) | |
3834 | ||
3835 | (defun artist-key-undraw-1point (x y) | |
3836 | "Undraw current 1-point shape at X, Y." | |
3837 | ;; No undraw-info for 1-point shapes | |
3838 | nil) | |
3839 | ||
3840 | (defun artist-key-undraw-2points (x y) | |
3841 | "Undraw current 2-point shape at X, Y." | |
3842 | (let ((undraw-fn (artist-go-get-undraw-fn-from-symbol artist-curr-go)) | |
3843 | (x1 (artist-endpoint-get-x artist-key-endpoint1)) | |
3844 | (y1 (artist-endpoint-get-y artist-key-endpoint1))) | |
3845 | (artist-funcall undraw-fn artist-key-shape))) | |
3846 | ||
3847 | (defun artist-key-undraw-common () | |
3848 | "Common routine undrawing current shape." | |
3849 | (let ((draw-how (artist-go-get-draw-how-from-symbol artist-curr-go)) | |
3850 | (col (artist-current-column)) | |
3851 | (row (artist-current-line))) | |
3852 | ||
3853 | ;; Depending on what we are currently drawing, call other routines | |
3854 | ;; that knows how to do the job | |
3855 | ;; | |
3856 | (cond ((eq draw-how 'artist-do-continously) | |
3857 | (artist-key-undraw-continously col row)) | |
3858 | ((eq draw-how 'artist-do-poly) | |
3859 | (artist-key-undraw-poly col row)) | |
3860 | ((and (numberp draw-how) (= draw-how 1)) | |
3861 | (artist-key-undraw-1point col row)) | |
3862 | ((and (numberp draw-how) (= draw-how 2)) | |
3863 | (artist-key-undraw-2points col row)) | |
3864 | (t (message "Undrawing \"%s\"s is not yet implemented" draw-how))) | |
3865 | ||
3866 | ;; Now restore the old position | |
3867 | ;; | |
3868 | (artist-move-to-xy col row))) | |
3869 | ||
3870 | ||
3871 | ||
3872 | ;; Implementation note: This really should honor the interval-fn entry | |
3873 | ;; in the master table, `artist-mt', which would mean leaving a timer | |
3874 | ;; that calls `draw-fn' every now and then. That timer would then have | |
3875 | ;; to be cancelled and reinstalled whenever the user moves the cursor. | |
3876 | ;; This could be done, but what if the user suddenly switches to another | |
3877 | ;; drawing mode, or even kills the buffer! In the mouse case, it is much | |
3878 | ;; simpler: when at the end of `artist-mouse-draw-continously', the | |
3879 | ;; user has released the button, so the timer will always be cancelled | |
3880 | ;; at that point. | |
3881 | (defun artist-key-draw-continously (x y) | |
3882 | "Draws current continous shape at X,Y." | |
3883 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go))) | |
3884 | (setq artist-key-shape (artist-funcall draw-fn x y)))) | |
3885 | ||
3886 | (defun artist-key-draw-poly (x y) | |
3887 | "Draws current poly-point shape with nth point at X,Y." | |
3888 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go)) | |
3889 | (x1 (artist-endpoint-get-x artist-key-endpoint1)) | |
3890 | (y1 (artist-endpoint-get-y artist-key-endpoint1))) | |
3891 | (setq artist-key-shape (artist-funcall draw-fn x1 y1 x y)))) | |
3892 | ||
3893 | (defun artist-key-draw-1point (x y) | |
3894 | "Draws current 1-point shape at X,Y." | |
3895 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go))) | |
3896 | (setq artist-key-shape (artist-funcall draw-fn x y)))) | |
3897 | ||
3898 | ||
3899 | (defun artist-key-draw-2points (x y) | |
3900 | "Draws current 2-point shape at X,Y." | |
3901 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go)) | |
3902 | (x1 (artist-endpoint-get-x artist-key-endpoint1)) | |
3903 | (y1 (artist-endpoint-get-y artist-key-endpoint1))) | |
3904 | (setq artist-key-shape (artist-funcall draw-fn x1 y1 x y)))) | |
3905 | ||
3906 | (defun artist-key-draw-common () | |
3907 | "Common routine for drawing current shape." | |
3908 | (let ((draw-how (artist-go-get-draw-how-from-symbol artist-curr-go)) | |
3909 | (col (artist-current-column)) | |
3910 | (row (artist-current-line))) | |
3911 | ||
3912 | ;; Depending on what we are currently drawing, call other routines | |
3913 | ;; that knows how to do the job | |
3914 | ;; | |
3915 | (cond ((eq draw-how 'artist-do-continously) | |
3916 | (artist-key-draw-continously col row)) | |
3917 | ((eq draw-how 'artist-do-poly) | |
3918 | (artist-key-draw-poly col row)) | |
3919 | ((and (numberp draw-how) (= draw-how 1)) | |
3920 | (artist-key-draw-1point col row)) | |
3921 | ((and (numberp draw-how) (= draw-how 2)) | |
3922 | (artist-key-draw-2points col row)) | |
3923 | (t (message "Drawing \"%s\"s is not yet implemented" draw-how))) | |
3924 | ||
3925 | ;; Now restore the old position | |
3926 | ;; | |
3927 | (artist-move-to-xy col row))) | |
3928 | ||
3929 | ||
3930 | ||
3931 | ;; | |
3932 | ;; Functions related to trimming line-endings | |
3933 | ;; The region between the topmost and bottommost visited line is | |
3934 | ;; called a draw-region. | |
3935 | ;; | |
3936 | ||
3937 | (defun artist-draw-region-reset () | |
3938 | "Reset the current draw-region." | |
3939 | (setq artist-draw-region-max-y 0) | |
3940 | (setq artist-draw-region-min-y 1000000)) | |
3941 | ||
3942 | (defun artist-draw-region-trim-line-endings (min-y max-y) | |
3943 | "Trim lines in current draw-region from MIN-Y to MAX-Y. | |
3944 | Trimming here means removing white space at end of a line" | |
3945 | ;; Safetyc check: switch min-y and max-y if if max-y is smaller | |
3946 | (if (< max-y min-y) | |
3947 | (let ((tmp min-y)) | |
3948 | (setq min-y max-y) | |
3949 | (setq max-y tmp))) | |
3950 | (save-excursion | |
3951 | (let ((curr-y min-y)) | |
3952 | (while (<= curr-y max-y) | |
3953 | (artist-move-to-xy 0 curr-y) | |
3954 | (end-of-line) | |
3955 | (delete-horizontal-space) | |
3956 | (setq curr-y (1+ curr-y)))))) | |
3957 | ||
3958 | ;; | |
3959 | ;; Drawing shapes by using keys | |
3960 | ;; | |
3961 | ||
3962 | (defun artist-key-do-continously-continously (x y) | |
3963 | "Update current continous shape at X,Y." | |
3964 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go))) | |
3965 | (artist-funcall draw-fn x y))) | |
3966 | ||
3967 | ||
3968 | (defun artist-key-do-continously-poly (x y) | |
3969 | "Update current poly-point shape with nth point at X,Y." | |
3970 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go)) | |
3971 | (undraw-fn (artist-go-get-undraw-fn-from-symbol artist-curr-go)) | |
3972 | (x1 (artist-endpoint-get-x artist-key-endpoint1)) | |
3973 | (y1 (artist-endpoint-get-y artist-key-endpoint1)) | |
3974 | (x2 x) | |
3975 | (y2 y)) | |
3976 | ;; If not rubber-banding, then move the 2 | |
3977 | ;; Otherwise re-draw the shape to the new position | |
3978 | ;; | |
3979 | (if (not artist-rubber-banding) | |
3980 | (progn | |
3981 | (artist-no-rb-unset-point2) | |
3982 | (artist-no-rb-set-point2 x y)) | |
3983 | (progn | |
3984 | (artist-funcall undraw-fn artist-key-shape) | |
3985 | (setq artist-key-shape (artist-funcall draw-fn x1 y1 x2 y2)))))) | |
3986 | ||
3987 | ||
3988 | (defun artist-key-do-continously-1point (x y) | |
3989 | "Update current 1-point shape at X,Y." | |
3990 | ;; Nothing to do continously for operations | |
3991 | ;; where we have only one input point | |
3992 | nil) | |
3993 | ||
3994 | (defun artist-key-do-continously-2points (x y) | |
3995 | "Update current 2-point shape with 2nd point at X,Y." | |
3996 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go)) | |
3997 | (undraw-fn (artist-go-get-undraw-fn-from-symbol artist-curr-go)) | |
3998 | (x1 (artist-endpoint-get-x artist-key-endpoint1)) | |
3999 | (y1 (artist-endpoint-get-y artist-key-endpoint1)) | |
4000 | (x2 x) | |
4001 | (y2 y)) | |
4002 | ;; If not rubber-banding, then move the 2 | |
4003 | ;; Otherwise re-draw the shape to the new position | |
4004 | ;; | |
4005 | (if (not artist-rubber-banding) | |
4006 | (progn | |
4007 | (artist-no-rb-unset-point2) | |
4008 | (artist-no-rb-set-point2 x y)) | |
4009 | (progn | |
4010 | (artist-funcall undraw-fn artist-key-shape) | |
4011 | (setq artist-key-shape (artist-funcall draw-fn x1 y1 x2 y2)))))) | |
4012 | ||
4013 | ||
4014 | (defun artist-key-do-continously-common () | |
4015 | "Common routine for updating current shape." | |
4016 | (let ((draw-how (artist-go-get-draw-how-from-symbol artist-curr-go)) | |
4017 | (col (artist-current-column)) | |
4018 | (row (artist-current-line))) | |
4019 | ||
4020 | ;; Depending on what we are currently drawing, call other routines | |
4021 | ;; that knows how to do the job | |
4022 | ;; | |
4023 | (cond ((eq draw-how 'artist-do-continously) | |
4024 | (artist-key-do-continously-continously col row)) | |
4025 | ((eq draw-how 'artist-do-poly) | |
4026 | (artist-key-do-continously-poly col row)) | |
4027 | ((and (numberp draw-how) (= draw-how 1)) | |
4028 | (artist-key-do-continously-1point col row)) | |
4029 | ((and (numberp draw-how) (= draw-how 2)) | |
4030 | (artist-key-do-continously-2points col row)) | |
4031 | (t (message "Drawing \"%s\"s is not yet implemented" draw-how))) | |
4032 | ||
4033 | ;; Now restore the old position | |
4034 | ;; | |
4035 | (artist-move-to-xy col row))) | |
4036 | ||
4037 | ||
4038 | (defun artist-key-set-point-continously (x y) | |
4039 | "Set point for current continous shape at X,Y." | |
4040 | ;; Maybe set arrow-points for continous shapes | |
4041 | (let ((arrow-pred (artist-go-get-arrow-pred-from-symbol artist-curr-go)) | |
4042 | (arrow-set-fn (artist-go-get-arrow-set-fn-from-symbol artist-curr-go)) | |
4043 | (init-fn (artist-go-get-init-fn-from-symbol artist-curr-go)) | |
4044 | (prep-fill-fn (artist-go-get-prep-fill-fn-from-symbol artist-curr-go)) | |
4045 | (exit-fn (artist-go-get-exit-fn-from-symbol artist-curr-go))) | |
4046 | ||
4047 | (if (not artist-key-is-drawing) | |
4048 | ;; *** We are about to begin drawing | |
4049 | (progn | |
4050 | (artist-funcall init-fn x y)) | |
4051 | ||
4052 | ;; *** We are about to stop drawing | |
4053 | (progn | |
4054 | ||
4055 | (artist-funcall prep-fill-fn x y) | |
4056 | (if (artist-funcall arrow-pred) | |
4057 | (artist-funcall arrow-set-fn x y) | |
4058 | (artist-clear-arrow-points)) | |
4059 | (artist-funcall exit-fn x y)))) | |
4060 | ||
4061 | ;; Toggle the is-drawing flag | |
4062 | (setq artist-key-is-drawing (not artist-key-is-drawing))) | |
4063 | ||
4064 | ||
4065 | ||
4066 | (defun artist-key-set-point-poly (x y &optional this-is-last-point) | |
4067 | "Set point for current poly-point shape at X,Y. | |
4068 | If optional argument THIS-IS-LAST-POINT is non-nil, this point is the last." | |
4069 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go)) | |
4070 | (init-fn (artist-go-get-init-fn-from-symbol artist-curr-go)) | |
4071 | (prep-fill-fn (artist-go-get-prep-fill-fn-from-symbol artist-curr-go)) | |
4072 | (exit-fn (artist-go-get-exit-fn-from-symbol artist-curr-go)) | |
4073 | (fill-pred (artist-go-get-fill-pred-from-symbol artist-curr-go)) | |
4074 | (fill-fn (artist-go-get-fill-fn-from-symbol artist-curr-go)) | |
4075 | (arrow-pred (artist-go-get-arrow-pred-from-symbol artist-curr-go)) | |
4076 | (arrow-set-fn (artist-go-get-arrow-set-fn-from-symbol artist-curr-go))) | |
4077 | ||
4078 | (if (not artist-key-is-drawing) | |
4079 | ||
4080 | ;; *** We were not drawing ==> set first point | |
4081 | (progn | |
4082 | ||
4083 | (artist-funcall init-fn x y) | |
4084 | ||
4085 | ;; If not rubber-banding, set first point. | |
4086 | ;; Otherwise, draw the shape from x,y to x,y | |
4087 | (if (not artist-rubber-banding) | |
4088 | (artist-no-rb-set-point1 x y) | |
4089 | (setq artist-key-shape (artist-funcall draw-fn x y x y))) | |
4090 | ||
4091 | ;; Set first endpoint | |
4092 | (setq artist-key-endpoint1 (artist-make-endpoint x y)) | |
4093 | ||
4094 | ;; Set point-list to contain start point | |
4095 | (setq artist-key-poly-point-list (list (artist-make-endpoint x y))) | |
4096 | ||
4097 | ;; Since we are not ready, set the arrow-points to nil | |
4098 | (artist-clear-arrow-points) | |
4099 | ||
4100 | ;; Change state to drawing | |
4101 | (setq artist-key-is-drawing t) | |
4102 | ||
4103 | ;; Feedback | |
4104 | (message (substitute-command-keys | |
4105 | (concat "First point set. " | |
4106 | "Set next with \\[artist-key-set-point], " | |
4107 | "set last with C-u \\[artist-key-set-point]")))) | |
4108 | ||
4109 | ||
4110 | ;; *** We were drawing ==> we are about to set nth point | |
4111 | ;; (last point if the argument this-is-last-point is non-nil) | |
4112 | ;; | |
4113 | (let ((x1 (artist-endpoint-get-x artist-key-endpoint1)) | |
4114 | (y1 (artist-endpoint-get-y artist-key-endpoint1)) | |
4115 | (x2 x) | |
4116 | (y2 y)) | |
4117 | ||
4118 | ;; If not rubber-banding, undraw the 1's and 2's, then | |
4119 | ;; draw the shape (if we were rubber-banding, then the | |
4120 | ;; shape is already drawn in artist-key-do-continously-2points.) | |
4121 | ;; | |
4122 | (if (not artist-rubber-banding) | |
4123 | (progn | |
4124 | (artist-no-rb-unset-points) | |
4125 | (setq artist-key-shape (artist-funcall draw-fn x1 y1 x2 y2)))) | |
4126 | ||
4127 | ;; Set x2 and y2 from shape's second point | |
4128 | ;; (which might be different from the mouse's second point, | |
4129 | ;; if, for example, we are drawing a straight line) | |
4130 | ;; | |
4131 | (if (not (null artist-key-shape)) | |
4132 | (let ((endpoint2 (artist-2point-get-endpoint2 artist-key-shape))) | |
4133 | (setq x2 (artist-endpoint-get-x endpoint2)) | |
4134 | (setq y2 (artist-endpoint-get-y endpoint2)))) | |
4135 | ||
4136 | ;; Add the endpoint to the list of poly-points | |
4137 | (setq artist-key-poly-point-list | |
4138 | (append artist-key-poly-point-list | |
4139 | (list (artist-make-endpoint x2 y2)))) | |
4140 | ||
4141 | ;; Now do handle the case when this is the last point, | |
4142 | ;; and the case when this point isn't the last | |
4143 | ;; | |
4144 | (if (not this-is-last-point) | |
4145 | ;; ** This is not the last point | |
4146 | (progn | |
4147 | ;; Start drawing a new 2-point-shape from last endpoint. | |
4148 | ||
4149 | ;; First set the start-point | |
4150 | (setq x1 x2) | |
4151 | (setq y1 y2) | |
4152 | (setq artist-key-endpoint1 (artist-make-endpoint x1 y1)) | |
4153 | ||
4154 | ;; If we are not rubber-banding, then place the '1 | |
4155 | ;; Otherwise, draw the shape from x1,y1 to x1,y1 | |
4156 | (if (not artist-rubber-banding) | |
4157 | (artist-no-rb-set-point1 x1 y1) | |
4158 | (setq artist-key-shape (artist-funcall draw-fn x1 y1 x1 y1))) | |
4159 | ||
4160 | ;; Feedback | |
4161 | (message "Point set")) | |
4162 | ||
4163 | ;; ** This is the last point | |
4164 | (progn | |
4165 | ||
4166 | (artist-funcall prep-fill-fn artist-key-poly-point-list) | |
4167 | ||
4168 | ;; Maybe fill | |
4169 | (if (artist-funcall fill-pred) | |
4170 | (artist-funcall fill-fn artist-key-shape | |
4171 | artist-key-poly-point-list)) | |
4172 | ||
4173 | ;; Set the arrow-points | |
4174 | (if (artist-funcall arrow-pred) | |
4175 | (artist-funcall arrow-set-fn artist-key-poly-point-list) | |
4176 | (artist-clear-arrow-points)) | |
4177 | ||
4178 | (artist-funcall exit-fn artist-key-poly-point-list) | |
4179 | ||
4180 | ;; Change state to not drawing | |
4181 | (setq artist-key-shape nil) | |
4182 | (setq artist-key-endpoint1 nil) | |
4183 | (setq artist-key-is-drawing nil))))))) | |
4184 | ||
4185 | ||
4186 | (defun artist-key-set-point-1point (x y) | |
4187 | "Set point for current 1-point shape at X,Y." | |
4188 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go)) | |
4189 | (init-fn (artist-go-get-init-fn-from-symbol artist-curr-go)) | |
4190 | (prep-fill-fn (artist-go-get-prep-fill-fn-from-symbol artist-curr-go)) | |
4191 | (exit-fn (artist-go-get-exit-fn-from-symbol artist-curr-go)) | |
4192 | (draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go)) | |
4193 | (arrow-pred (artist-go-get-arrow-pred-from-symbol artist-curr-go)) | |
4194 | (arrow-set-fn (artist-go-get-arrow-set-fn-from-symbol artist-curr-go))) | |
4195 | (artist-funcall init-fn x y) | |
4196 | (artist-funcall draw-fn x y) | |
4197 | (artist-funcall prep-fill-fn x y) | |
4198 | (if (artist-funcall arrow-pred) | |
4199 | (artist-funcall arrow-set-fn x y) | |
4200 | (artist-clear-arrow-points)) | |
4201 | (artist-funcall exit-fn x y)) | |
4202 | (setq artist-key-shape nil) | |
4203 | (setq artist-key-is-drawing nil)) | |
4204 | ||
4205 | ||
4206 | (defun artist-key-set-point-2points (x y) | |
4207 | "Set first or second point in current 2-point shape at X,Y." | |
4208 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol artist-curr-go)) | |
4209 | (init-fn (artist-go-get-init-fn-from-symbol artist-curr-go)) | |
4210 | (prep-fill-fn (artist-go-get-prep-fill-fn-from-symbol artist-curr-go)) | |
4211 | (exit-fn (artist-go-get-exit-fn-from-symbol artist-curr-go)) | |
4212 | (fill-pred (artist-go-get-fill-pred-from-symbol artist-curr-go)) | |
4213 | (fill-fn (artist-go-get-fill-fn-from-symbol artist-curr-go)) | |
4214 | (arrow-pred (artist-go-get-arrow-pred-from-symbol artist-curr-go)) | |
4215 | (arrow-set-fn (artist-go-get-arrow-set-fn-from-symbol artist-curr-go))) | |
4216 | (if (not artist-key-is-drawing) | |
4217 | ||
4218 | ;; *** We were not drawing ==> set first point | |
4219 | (progn | |
4220 | ||
4221 | (artist-funcall init-fn x y) | |
4222 | ||
4223 | ;; If not rubber-banding, set first point. | |
4224 | ;; Otherwise, draw the shape from x,y to x,y | |
4225 | (if (not artist-rubber-banding) | |
4226 | (artist-no-rb-set-point1 x y) | |
4227 | (setq artist-key-shape (artist-funcall draw-fn x y x y))) | |
4228 | ||
4229 | ;; Set first endpoint | |
4230 | (setq artist-key-endpoint1 (artist-make-endpoint x y)) | |
4231 | ||
4232 | ;; Since we are not ready, clear the arrow-points | |
4233 | (artist-clear-arrow-points) | |
4234 | ||
4235 | ;; Change state to drawing | |
4236 | (setq artist-key-is-drawing t)) | |
4237 | ||
4238 | ;; *** We were drawing ==> we are about to set 2nd point | |
4239 | ;; and end the drawing operation | |
4240 | ||
4241 | (let ((x1 (artist-endpoint-get-x artist-key-endpoint1)) | |
4242 | (y1 (artist-endpoint-get-y artist-key-endpoint1)) | |
4243 | (x2 x) | |
4244 | (y2 y)) | |
4245 | ||
4246 | ;; If not rubber-banding, undraw the 1's and 2's, then | |
4247 | ;; draw the shape (if we were rubber-banding, then the | |
4248 | ;; shape is already drawn in artist-key-do-continously-2points.) | |
4249 | ;; | |
4250 | (if (not artist-rubber-banding) | |
4251 | (progn | |
4252 | (artist-no-rb-unset-points) | |
4253 | (setq artist-key-shape (artist-funcall draw-fn x1 y1 x2 y2)))) | |
4254 | ||
4255 | (artist-funcall prep-fill-fn artist-key-shape x1 y1 x2 y2) | |
4256 | ||
4257 | ;; Maybe fill | |
4258 | ;; | |
4259 | (if (artist-funcall fill-pred) | |
4260 | (artist-funcall fill-fn artist-key-shape x1 y1 x2 y2)) | |
4261 | ||
4262 | ;; Maybe set the arrow-points | |
4263 | ;; | |
4264 | (if (artist-funcall arrow-pred) | |
4265 | (artist-funcall arrow-set-fn artist-key-shape x1 y1 x2 y2) | |
4266 | (artist-clear-arrow-points)) | |
4267 | ||
4268 | (artist-funcall exit-fn artist-key-shape x1 y1 x2 y2) | |
4269 | ||
4270 | ;; Change state to not drawing | |
4271 | (setq artist-key-is-drawing nil))))) | |
4272 | ||
4273 | ||
4274 | (defun artist-key-set-point-common (arg) | |
4275 | "Common routine for setting point in current shape. | |
4276 | With ARG set to t, set the last point." | |
4277 | (let ((draw-how (artist-go-get-draw-how-from-symbol artist-curr-go)) | |
4278 | (col (artist-current-column)) | |
4279 | (row (artist-current-line)) | |
4280 | (was-drawing artist-key-is-drawing)) | |
4281 | ||
4282 | ;; First, if we are about to draw, then reset the draw-region | |
4283 | (if (not artist-key-is-drawing) | |
4284 | (artist-draw-region-reset)) | |
4285 | ||
4286 | ;; Depending on what we are currently drawing, call other routines | |
4287 | ;; that knows how to do the job | |
4288 | ;; | |
4289 | (cond ((eq draw-how 'artist-do-continously) | |
4290 | (artist-key-set-point-continously col row) | |
4291 | ;; Do this now, otherwise nothing will happen until we move. | |
4292 | (artist-key-do-continously-continously col row)) | |
4293 | ((eq draw-how 'artist-do-poly) | |
4294 | (artist-key-set-point-poly col row arg)) | |
4295 | ((and (numberp draw-how) (= draw-how 1)) | |
4296 | (artist-key-set-point-1point col row)) | |
4297 | ((and (numberp draw-how) (= draw-how 2)) | |
4298 | (artist-key-set-point-2points col row)) | |
4299 | (t (message "Drawing \"%s\"s is not yet implemented" draw-how))) | |
4300 | ||
4301 | ;; Maybe trim line endings | |
4302 | (if (and artist-trim-line-endings | |
4303 | was-drawing | |
4304 | (not artist-key-is-drawing)) | |
4305 | (artist-draw-region-trim-line-endings artist-draw-region-min-y | |
4306 | artist-draw-region-max-y)) | |
4307 | ||
4308 | ;; Now restore the old position | |
4309 | ;; | |
4310 | (artist-move-to-xy col row) | |
4311 | (artist-mode-line-show-curr-operation artist-key-is-drawing))) | |
4312 | ||
4313 | ;; | |
4314 | ;; Key navigation | |
4315 | ;; | |
4316 | ||
4317 | (defun artist-previous-line (&optional n) | |
4318 | "Move cursor up optional N lines (default is 1), updating current shape. | |
4319 | If N is negative, move cursor down." | |
4320 | (interactive "p") | |
4321 | (let ((col (artist-current-column))) | |
4322 | (if (not artist-key-is-drawing) | |
4323 | (progn | |
4324 | (previous-line n) | |
4325 | (move-to-column col t)) | |
4326 | (previous-line n) | |
4327 | (move-to-column col t) | |
4328 | (artist-key-do-continously-common)))) | |
4329 | ||
4330 | ||
4331 | (defun artist-next-line (&optional n) | |
4332 | "Move cursor down optional N lines (default is 1), updating current shape. | |
4333 | If N is negative, move cursor up." | |
4334 | (interactive "p") | |
4335 | (let ((col (artist-current-column))) | |
4336 | (if (not artist-key-is-drawing) | |
4337 | (progn | |
4338 | (next-line n) | |
4339 | (move-to-column col t)) | |
4340 | (next-line n) | |
4341 | (move-to-column col t) | |
4342 | (artist-key-do-continously-common)))) | |
4343 | ||
4344 | (defun artist-backward-char (&optional n) | |
4345 | "Move cursor backward optional N chars (default is 1), updating curr shape. | |
4346 | If N is negative, move forward." | |
4347 | (interactive "p") | |
4348 | (if (> n 0) | |
4349 | (artist-forward-char (- n)) | |
4350 | (artist-forward-char n))) | |
4351 | ||
4352 | (defun artist-forward-char (&optional n) | |
4353 | "Move cursor forward optional N chars (default is 1), updating curr shape. | |
4354 | If N is negative, move backward." | |
4355 | (interactive "p") | |
4356 | (let* ((step-x (if (>= n 0) 1 -1)) | |
4357 | (distance (abs n)) | |
4358 | (curr-col (artist-current-column)) | |
4359 | (new-col (max 0 (+ curr-col (* distance step-x))))) | |
4360 | (if (not artist-key-is-drawing) | |
4361 | (move-to-column new-col t) | |
4362 | (move-to-column new-col t) | |
4363 | (artist-key-do-continously-common)))) | |
4364 | ||
4365 | ||
4366 | (defun artist-key-set-point (&optional arg) | |
4367 | "Set a point for the current shape. With optional ARG, set the last point." | |
4368 | (interactive "P") | |
4369 | (artist-key-set-point-common arg)) | |
4370 | ||
4371 | ||
4372 | (defun artist-select-fill-char (c) | |
4373 | "Set current fill character to be C." | |
4374 | (interactive "cType fill char (type RET to turn off): ") | |
4375 | (cond ((eq c ?\r) (setq artist-fill-char-set nil) | |
4376 | (message "Fill cancelled")) | |
4377 | (t (setq artist-fill-char-set t) | |
4378 | (setq artist-fill-char c) | |
4379 | (message "Fill set to \"%c\"" c)))) | |
4380 | ||
4381 | ||
4382 | (defun artist-select-line-char (c) | |
4383 | "Set current line character to be C." | |
4384 | (interactive "cType line char (type RET to turn off): ") | |
4385 | (cond ((eq c ?\r) (setq artist-line-char-set nil) | |
4386 | (message "Normal lines")) | |
4387 | (t (setq artist-line-char-set t) | |
4388 | (setq artist-line-char c) | |
4389 | (message "Line drawn with \"%c\"" c))) | |
4390 | (if artist-key-is-drawing | |
4391 | (artist-key-do-continously-common))) | |
4392 | ||
4393 | ||
4394 | (defun artist-select-erase-char (c) | |
4395 | "Set current erase character to be C." | |
4396 | (interactive "cType char to use when erasing (type RET for normal): ") | |
4397 | (cond ((eq c ?\r) (setq artist-erase-char ?\ ) | |
4398 | (message "Normal erasing")) | |
4399 | (t (setq artist-erase-char c) | |
4400 | (message "Erasing with \"%c\"" c))) | |
4401 | (if artist-key-is-drawing | |
4402 | (artist-key-do-continously-common))) | |
4403 | ||
4404 | (defun artist-charlist-to-string (char-list) | |
4405 | "Convert a list of characters, CHAR-LIST, to a string." | |
4406 | (let ((result "")) | |
4407 | (while (not (null char-list)) | |
4408 | (setq result (concat result (char-to-string (car char-list)))) | |
4409 | (setq char-list (cdr char-list))) | |
4410 | result)) | |
4411 | ||
4412 | (defun artist-string-to-charlist (str) | |
4413 | "Convert a string, STR, to list of characters." | |
4414 | (append str nil)) | |
4415 | ||
4416 | (defun artist-select-spray-chars (chars initial-char) | |
4417 | "Set current spray characters to be CHARS, starting with INITIAL-CHAR." | |
4418 | ;; This huge unreadable `interactive'-clause does the following | |
4419 | ;; 1. Asks for a string of spray-characters | |
4420 | ;; 2. Asks for the initial character (default is the first), | |
4421 | ;; and loops if the answer is not a char within the string in 1. | |
4422 | (interactive | |
4423 | (let* ((str (read-string "Select spray-can characters, lightest first: " | |
4424 | (artist-charlist-to-string artist-spray-chars))) | |
4425 | (char-list (artist-string-to-charlist str)) | |
4426 | (initial (let* ((err-msg "") | |
4427 | (ok nil) | |
4428 | (first-char-as-str (char-to-string (car char-list))) | |
4429 | (first-s) (first-c)) | |
4430 | (while (not ok) | |
4431 | (setq first-s | |
4432 | (read-string | |
4433 | (format (concat "%sSelect initial-character, " | |
4434 | "one of \"%s\" (%s): ") | |
4435 | err-msg str first-char-as-str))) | |
4436 | (if (equal first-s "") | |
4437 | (setq first-s first-char-as-str)) | |
4438 | (setq first-c (car (artist-string-to-charlist first-s))) | |
4439 | (setq ok (not (null (member first-c char-list)))) | |
4440 | (if (not ok) | |
4441 | (setq err-msg (format | |
4442 | "Not in spray-chars: \"%s\". " | |
4443 | (char-to-string first-c))))) | |
4444 | first-c))) | |
4445 | (list char-list initial))) | |
4446 | (setq artist-spray-chars chars) | |
4447 | (setq artist-spray-new-char initial-char) | |
4448 | (message "Spray-chars set to \"%s\", initial: \"%s\"" | |
4449 | (artist-charlist-to-string chars) (char-to-string initial-char))) | |
4450 | ||
4451 | ||
4452 | (defun artist-select-operation (op-str) | |
4453 | "Select drawing operation OP-STR." | |
4454 | (interactive (list (completing-read "Select operation: " | |
4455 | artist-key-compl-table))) | |
4456 | (let* ((op-symbol (artist-mt-get-symbol-from-keyword op-str)) | |
4457 | (draw-how (if op-symbol | |
4458 | (artist-go-get-draw-how-from-symbol op-symbol) | |
4459 | nil))) | |
4460 | ;; First check that the string was valid | |
4461 | (if (null op-symbol) | |
4462 | (error "Unknown drawing method: %s" op-str)) | |
4463 | ||
4464 | ;; Second, check that we are not about to switch to a different | |
4465 | ;; kind of shape (do that only if we are drawing with keys; | |
4466 | ;; otherwise this function cannot get called). | |
4467 | (if (and artist-key-is-drawing | |
4468 | (not (equal artist-key-draw-how draw-how))) | |
4469 | (error "Cannot switch to a different kind of shape while drawing")) | |
4470 | ||
4471 | ;; If we were drawing, undraw the shape | |
4472 | (if (and artist-key-is-drawing | |
4473 | artist-rubber-banding) | |
4474 | (artist-key-undraw-common)) | |
4475 | ||
4476 | ;; Set the current operation and draw-how | |
4477 | (setq artist-curr-go op-symbol) | |
4478 | (setq artist-key-draw-how draw-how) | |
4479 | ||
4480 | ;; If we were drawing, redraw the shape (but don't if shape | |
4481 | ;; is drawn by setting only one point) | |
4482 | (if (and artist-key-is-drawing | |
4483 | artist-rubber-banding | |
4484 | (not (eq artist-key-draw-how 1))) | |
4485 | (artist-key-draw-common))) | |
4486 | ||
4487 | ;; Feedback | |
4488 | (artist-mode-line-show-curr-operation artist-key-is-drawing)) | |
4489 | ||
4490 | ||
4491 | (defun artist-toggle-rubber-banding (&optional state) | |
4492 | "Toggle rubber-banding. | |
4493 | If optional argument STATE is positive, turn rubber-banding on." | |
4494 | (interactive) | |
4495 | (if artist-key-is-drawing | |
4496 | (error "Cannot toggle rubber-banding while drawing")) | |
4497 | (if (setq artist-rubber-banding | |
4498 | (if (null state) (not artist-rubber-banding) | |
4499 | (> (prefix-numeric-value state) 0))) | |
4500 | (message "Rubber-banding is now on") | |
4501 | (message "Rubber-banding is now off"))) | |
4502 | ||
4503 | ||
4504 | (defun artist-toggle-trim-line-endings (&optional state) | |
4505 | "Toggle trimming of line-endings. | |
4506 | If optional argument STATE is positive, turn trimming on." | |
4507 | (interactive) | |
4508 | (if (setq artist-trim-line-endings | |
4509 | (if (null state) (not artist-trim-line-endings) | |
4510 | (> (prefix-numeric-value state) 0))) | |
4511 | (message "Trimming is now on") | |
4512 | (message "Trimming is now off"))) | |
4513 | ||
4514 | ||
4515 | (defun artist-toggle-borderless-shapes (&optional state) | |
4516 | "Toggle borders of shapes. | |
4517 | If optional argument STATE is positive, turn borders on." | |
4518 | (interactive) | |
4519 | (if (setq artist-borderless-shapes | |
4520 | (if (null state) (not artist-borderless-shapes) | |
4521 | (> (prefix-numeric-value state) 0))) | |
4522 | (message "Borders are now off") | |
4523 | (message "Borders are now on"))) | |
4524 | ||
4525 | ||
4526 | (defun artist-toggle-first-arrow () | |
4527 | "Toggle first arrow for shape, if possible." | |
4528 | (interactive) | |
4529 | (save-excursion | |
4530 | (if (not (null artist-arrow-point-1)) | |
4531 | (let* ((arrow-point artist-arrow-point-1) | |
4532 | (arrow-state (artist-arrow-point-get-state arrow-point)) | |
4533 | (arrow-marker (artist-arrow-point-get-marker arrow-point)) | |
4534 | (direction (artist-arrow-point-get-direction arrow-point)) | |
4535 | (orig-char (artist-arrow-point-get-orig-char arrow-point)) | |
4536 | (arrow-char (aref artist-arrows direction)) | |
4537 | (new-state (not arrow-state))) | |
4538 | ||
4539 | (goto-char (marker-position arrow-marker)) | |
4540 | ||
4541 | (if new-state | |
4542 | (if arrow-char | |
4543 | (artist-replace-char arrow-char)) | |
4544 | (artist-replace-char orig-char)) | |
4545 | ||
4546 | (artist-arrow-point-set-state artist-arrow-point-1 new-state))))) | |
4547 | ||
4548 | (defun artist-toggle-second-arrow () | |
4549 | "Toggle second arrow for shape, if possible." | |
4550 | (interactive) | |
4551 | (save-excursion | |
4552 | (if (not (null artist-arrow-point-2)) | |
4553 | (let* ((arrow-point artist-arrow-point-2) | |
4554 | (arrow-state (artist-arrow-point-get-state arrow-point)) | |
4555 | (arrow-marker (artist-arrow-point-get-marker arrow-point)) | |
4556 | (direction (artist-arrow-point-get-direction arrow-point)) | |
4557 | (orig-char (artist-arrow-point-get-orig-char arrow-point)) | |
4558 | (arrow-char (aref artist-arrows direction)) | |
4559 | (new-state (not arrow-state))) | |
4560 | ||
4561 | (goto-char (marker-position arrow-marker)) | |
4562 | ||
4563 | (if new-state | |
4564 | (if arrow-char | |
4565 | (artist-replace-char arrow-char)) | |
4566 | (artist-replace-char orig-char)) | |
4567 | ||
4568 | (artist-arrow-point-set-state artist-arrow-point-2 new-state))))) | |
4569 | ||
4570 | ||
4571 | (defun artist-select-op-line () | |
4572 | "Select drawing lines." | |
4573 | (interactive) | |
4574 | (artist-select-operation "line")) | |
4575 | ||
4576 | (defun artist-select-op-straight-line () | |
4577 | "Select drawing straight lines." | |
4578 | (interactive) | |
4579 | (artist-select-operation "straight line")) | |
4580 | ||
4581 | (defun artist-select-op-rectangle () | |
4582 | "Select drawing rectangles." | |
4583 | (interactive) | |
4584 | (artist-select-operation "rectangle")) | |
4585 | ||
4586 | (defun artist-select-op-square () | |
4587 | "Select drawing squares." | |
4588 | (interactive) | |
4589 | (artist-select-operation "square")) | |
4590 | ||
4591 | (defun artist-select-op-poly-line () | |
4592 | "Select drawing poly-lines." | |
4593 | (interactive) | |
4594 | (artist-select-operation "poly-line")) | |
4595 | ||
4596 | (defun artist-select-op-straight-poly-line () | |
4597 | "Select drawing straight poly-lines." | |
4598 | (interactive) | |
4599 | (artist-select-operation "straight poly-line")) | |
4600 | ||
4601 | (defun artist-select-op-ellipse () | |
4602 | "Select drawing ellipses." | |
4603 | (interactive) | |
4604 | (artist-select-operation "ellipse")) | |
4605 | ||
4606 | (defun artist-select-op-circle () | |
4607 | "Select drawing circles." | |
4608 | (interactive) | |
4609 | (artist-select-operation "circle")) | |
4610 | ||
4611 | (defun artist-select-op-text-see-thru () | |
4612 | "Select rendering text (see thru)." | |
4613 | (interactive) | |
4614 | (artist-select-operation "text see-thru")) | |
4615 | ||
4616 | (defun artist-select-op-text-overwrite () | |
4617 | "Select rendering text (overwrite)." | |
4618 | (interactive) | |
4619 | (artist-select-operation "text overwrite")) | |
4620 | ||
4621 | (defun artist-select-op-spray-can () | |
4622 | "Select spraying." | |
4623 | (interactive) | |
4624 | (artist-select-operation "spray-can")) | |
4625 | ||
4626 | (defun artist-select-op-spray-set-size () | |
4627 | "Select setting size for spraying." | |
4628 | (interactive) | |
4629 | (artist-select-operation "spray set size")) | |
4630 | ||
4631 | (defun artist-select-op-erase-char () | |
4632 | "Select erasing characters." | |
4633 | (interactive) | |
4634 | (artist-select-operation "erase char")) | |
4635 | ||
4636 | (defun artist-select-op-erase-rectangle () | |
4637 | "Select erasing rectangles." | |
4638 | (interactive) | |
4639 | (artist-select-operation "erase rectangle")) | |
4640 | ||
4641 | (defun artist-select-op-vaporize-line () | |
4642 | "Select vaporizing single lines." | |
4643 | (interactive) | |
4644 | (artist-select-operation "vaporize line")) | |
4645 | ||
4646 | (defun artist-select-op-vaporize-lines () | |
4647 | "Select vaporizing connected lines." | |
4648 | (interactive) | |
4649 | (artist-select-operation "vaporize lines")) | |
4650 | ||
4651 | (defun artist-select-op-cut-rectangle () | |
4652 | "Select cutting rectangles." | |
4653 | (interactive) | |
4654 | (artist-select-operation "cut rectangle")) | |
4655 | ||
4656 | (defun artist-select-op-cut-square () | |
4657 | "Select cutting squares." | |
4658 | (interactive) | |
4659 | (artist-select-operation "cut square")) | |
4660 | ||
4661 | (defun artist-select-op-copy-rectangle () | |
4662 | "Select copying rectangles." | |
4663 | (interactive) | |
4664 | (artist-select-operation "copy rectangle")) | |
4665 | ||
4666 | (defun artist-select-op-copy-square () | |
4667 | "Select copying squares." | |
4668 | (interactive) | |
4669 | (artist-select-operation "cut square")) | |
4670 | ||
4671 | (defun artist-select-op-paste () | |
4672 | "Select pasting." | |
4673 | (interactive) | |
4674 | (artist-select-operation "paste")) | |
4675 | ||
4676 | (defun artist-select-op-flood-fill () | |
4677 | "Select flood-filling." | |
4678 | (interactive) | |
4679 | (artist-select-operation "flood-fill")) | |
4680 | ||
4681 | ||
4682 | ;; Drawing lines by using mouse | |
4683 | ;; Mouse button actions | |
4684 | ;; | |
4685 | ||
4686 | (defun artist-update-pointer-shape () | |
4687 | "Perform the update of the X Windows pointer shape." | |
4688 | (set-mouse-color nil)) | |
4689 | ||
4690 | (defun artist-set-pointer-shape (new-pointer-shape) | |
4691 | "Set the shape of the X Windows pointer to NEW-POINTER-SHAPE." | |
4692 | (setq x-pointer-shape new-pointer-shape) | |
4693 | (artist-update-pointer-shape)) | |
4694 | ||
4695 | (defsubst artist-event-is-shifted (ev) | |
4696 | "Check whether the shift-key is pressed in event EV." | |
4697 | (memq 'shift (event-modifiers ev))) | |
4698 | ||
4699 | (defun artist-do-nothing () | |
4700 | "Function that does nothing." | |
4701 | (interactive)) | |
4702 | ||
4703 | (defun artist-down-mouse-1 (ev) | |
4704 | "Perform drawing action for event EV." | |
4705 | (interactive "@e") | |
4706 | (let* ((real (artist-go-get-symbol-shift | |
4707 | artist-curr-go (artist-event-is-shifted ev))) | |
4708 | (draw-how (artist-go-get-draw-how-from-symbol real)) | |
4709 | ;; Remember original values for draw-region-min-y and max-y | |
4710 | ;; in case we are interrupting a key-draw operation. | |
4711 | (orig-draw-region-min-y artist-draw-region-min-y) | |
4712 | (orig-draw-region-max-y artist-draw-region-max-y) | |
4713 | (orig-pointer-shape (if (eq window-system 'x) x-pointer-shape nil)) | |
4714 | (echo-keystrokes 10000) ; a lot of seconds | |
4715 | ;; Remember original binding for the button-up event to this | |
4716 | ;; button-down event. | |
4717 | (key (let* ((basic (event-basic-type ev)) | |
4718 | (unshifted basic) | |
4719 | (shifted (make-symbol (concat "S-" (symbol-name basic))))) | |
4720 | (if (artist-event-is-shifted ev) | |
4721 | (make-vector 1 shifted) | |
4722 | (make-vector 1 unshifted)))) | |
4723 | (orig-button-up-binding (lookup-key (current-global-map) key))) | |
4724 | ||
4725 | (unwind-protect | |
4726 | (progn | |
4727 | (if (eq window-system 'x) | |
4728 | (artist-set-pointer-shape artist-pointer-shape)) | |
4729 | ||
4730 | ;; Redefine the button-up binding temporarily (the original | |
4731 | ;; binding is restored in the unwind-forms below). This is to | |
4732 | ;; avoid the phenomenon outlined in this scenario: | |
4733 | ;; | |
4734 | ;; 1. A routine which reads something from the mini-buffer (such | |
4735 | ;; as the text renderer) is called from below. | |
4736 | ;; 2. Meanwhile, the users releases the mouse button. | |
4737 | ;; 3. As a (funny :-) coincidence, the binding for the | |
4738 | ;; button-up event is often mouse-set-point, so Emacs | |
4739 | ;; sets the point to where the button was released, which is | |
4740 | ;; in the buffer where the user wants to place the text. | |
4741 | ;; 4. The user types C-x o (or uses the mouse once again) | |
4742 | ;; until he reaches the mini-buffer which is still prompting | |
4743 | ;; for some text to render. | |
4744 | ;; | |
4745 | ;; To do this foolproof, all local and minor-mode maps should | |
4746 | ;; be searched and temporarily changed as well, since they | |
4747 | ;; too might have some binding for the button-up event, | |
4748 | ;; but I hope dealing with the global map will suffice. | |
4749 | (define-key (current-global-map) key 'artist-do-nothing) | |
4750 | ||
4751 | (artist-draw-region-reset) | |
4752 | ||
4753 | (artist-mode-line-show-curr-operation t) | |
4754 | ||
4755 | (cond ((eq draw-how 'artist-do-continously) | |
4756 | (artist-mouse-draw-continously ev)) | |
4757 | ((eq draw-how 'artist-do-poly) | |
4758 | (artist-mouse-draw-poly ev)) | |
4759 | ((and (numberp draw-how) (= draw-how 1)) | |
4760 | (artist-mouse-draw-1point ev)) | |
4761 | ((and (numberp draw-how) (= draw-how 2)) | |
4762 | (artist-mouse-draw-2points ev)) | |
4763 | (t (message "Drawing \"%s\"s is not yet implemented" | |
4764 | draw-how))) | |
4765 | ||
4766 | (if artist-trim-line-endings | |
4767 | (artist-draw-region-trim-line-endings artist-draw-region-min-y | |
4768 | artist-draw-region-max-y)) | |
4769 | (setq artist-draw-region-min-y orig-draw-region-min-y) | |
4770 | (setq artist-draw-region-max-y orig-draw-region-max-y)) | |
4771 | ||
4772 | ; This is protected | |
4773 | (if (eq window-system 'x) | |
4774 | (artist-set-pointer-shape orig-pointer-shape)) | |
4775 | ||
4776 | (if orig-button-up-binding | |
4777 | (define-key (current-global-map) key orig-button-up-binding)) | |
4778 | ||
4779 | (artist-mode-line-show-curr-operation artist-key-is-drawing)))) | |
4780 | ||
4781 | ||
4782 | (defun artist-mouse-choose-operation (ev op) | |
4783 | "Choose operation for evenvt EV and operation OP." | |
4784 | (interactive | |
4785 | (progn | |
4786 | (select-window (posn-window (event-start last-input-event))) | |
4787 | (list last-input-event | |
4788 | (x-popup-menu last-nonmenu-event artist-popup-menu-table)))) | |
4789 | ||
4790 | (let ((draw-fn (artist-go-get-draw-fn-from-symbol (car op))) | |
4791 | (set-fn (artist-fc-get-fn-from-symbol (car op)))) | |
4792 | (cond | |
4793 | ||
4794 | ;; *** It was a draw-function | |
4795 | ((not (listp draw-fn)) | |
4796 | (let* ((unshifted (artist-go-get-symbol-shift (car op) nil)) | |
4797 | (shifted (artist-go-get-symbol-shift (car op) t)) | |
4798 | (shift-state (artist-event-is-shifted ev)) | |
4799 | (selected-op (if shift-state shifted unshifted)) | |
4800 | (keyword (artist-go-get-keyword-from-symbol selected-op))) | |
4801 | (artist-select-operation keyword))) | |
4802 | ||
4803 | ;; *** It was a set/unset function | |
4804 | ((not (listp set-fn)) | |
4805 | (call-interactively set-fn))))) | |
4806 | ||
4807 | ||
4808 | (defun artist-down-mouse-3 (ev) | |
4809 | "Erase character or rectangle, depending on event EV." | |
4810 | (interactive "@e") | |
4811 | (let ((artist-curr-go 'erase-char)) | |
4812 | (artist-down-mouse-1 ev)) | |
4813 | ;; Restore mode-line | |
4814 | (artist-mode-line-show-curr-operation artist-key-is-drawing)) | |
4815 | ||
4816 | ||
4817 | ;; | |
4818 | ;; Mouse routines | |
4819 | ;; | |
4820 | ||
4821 | (defsubst artist-shift-has-changed (shift-state ev) | |
4822 | "From the last SHIFT-STATE and EV, determine if the shift-state has changed." | |
4823 | ;; This one simply doesn't work. | |
4824 | ;; | |
4825 | ;; There seems to be no way to tell whether the user has pressed shift | |
4826 | ;; while dragging the cursor around when we are in a track-mouse | |
4827 | ;; form. Calling (event-modifiers ev) yields nil :-( Neither is the | |
4828 | ;; (event-basic-type ev) of any help (it is simply `mouse-movement'). | |
4829 | ;; | |
4830 | ;; So this doesn't work: | |
4831 | ;; (cond ((and shift-state (not (artist-event-is-shifted ev))) t) | |
4832 | ;; ((and (not shift-state) (artist-event-is-shifted ev)) t) | |
4833 | ;; (t nil)) | |
4834 | nil) | |
4835 | ||
4836 | (defun artist-coord-win-to-buf (coord) | |
4837 | "Convert a window-relative coordinate COORD to a buffer-relative coordinate." | |
4838 | (let ((window-x (car coord)) | |
4839 | (window-y (cdr coord)) | |
4840 | (window-start-x (window-hscroll)) | |
4841 | (window-start-y (save-excursion (goto-char (window-start)) | |
4842 | (artist-current-line)))) | |
4843 | (cons (+ window-x window-start-x) | |
4844 | (+ window-y window-start-y)))) | |
4845 | ||
4846 | ||
4847 | (defun artist-mouse-draw-continously (ev) | |
4848 | "Generic function for shapes that requires 1 point as input. | |
4849 | Operation is done continously while the mouse button is hold down. | |
4850 | The event, EV, is the mouse event." | |
4851 | (let* ((unshifted (artist-go-get-symbol-shift artist-curr-go nil)) | |
4852 | (shifted (artist-go-get-symbol-shift artist-curr-go t)) | |
4853 | (shift-state (artist-event-is-shifted ev)) | |
4854 | (op (if shift-state shifted unshifted)) | |
4855 | (draw-how (artist-go-get-draw-how-from-symbol op)) | |
4856 | (init-fn (artist-go-get-init-fn-from-symbol op)) | |
4857 | (prep-fill-fn (artist-go-get-prep-fill-fn-from-symbol op)) | |
4858 | (exit-fn (artist-go-get-exit-fn-from-symbol op)) | |
4859 | (draw-fn (artist-go-get-draw-fn-from-symbol op)) | |
4860 | (interval-fn (artist-go-get-interval-fn-from-symbol op)) | |
4861 | (interval (artist-funcall interval-fn)) | |
4862 | (arrow-pred (artist-go-get-arrow-pred-from-symbol op)) | |
4863 | (arrow-set-fn (artist-go-get-arrow-set-fn-from-symbol op)) | |
4864 | (ev-start (event-start ev)) | |
4865 | (initial-win (posn-window ev-start)) | |
4866 | (ev-start-pos (artist-coord-win-to-buf (posn-col-row ev-start))) | |
4867 | (x1 (car ev-start-pos)) | |
4868 | (y1 (cdr ev-start-pos)) | |
4869 | (shape) | |
4870 | (timer)) | |
4871 | (select-window (posn-window ev-start)) | |
4872 | (artist-funcall init-fn x1 y1) | |
4873 | (if (not artist-rubber-banding) | |
4874 | (artist-no-rb-set-point1 x1 y1)) | |
4875 | (track-mouse | |
4876 | (while (or (mouse-movement-p ev) | |
4877 | (member 'down (event-modifiers ev))) | |
4878 | (setq ev-start-pos (artist-coord-win-to-buf | |
4879 | (posn-col-row (event-start ev)))) | |
4880 | (setq x1 (car ev-start-pos)) | |
4881 | (setq y1 (cdr ev-start-pos)) | |
4882 | ||
4883 | ;; Cancel previous timer | |
4884 | (if timer | |
4885 | (cancel-timer timer)) | |
4886 | ||
4887 | (if (not (eq initial-win (posn-window (event-start ev)))) | |
4888 | ;; If we moved outside the window, do nothing | |
4889 | nil | |
4890 | ||
4891 | ;; Still in same window: | |
4892 | ;; | |
4893 | ;; Check if user presses or releases shift key | |
4894 | (if (artist-shift-has-changed shift-state ev) | |
4895 | ||
4896 | ;; First check that the draw-how is the same as we | |
4897 | ;; already have. Otherwise, ignore the changed shift-state. | |
4898 | (if (not (eq draw-how | |
4899 | (artist-go-get-draw-how-from-symbol | |
4900 | (if (not shift-state) shifted unshifted)))) | |
4901 | (message "Cannot switch to shifted operation") | |
4902 | ||
4903 | ;; progn is "implicit" since this is the else-part | |
4904 | (setq shift-state (not shift-state)) | |
4905 | (setq op (if shift-state shifted unshifted)) | |
4906 | (setq draw-how (artist-go-get-draw-how-from-symbol op)) | |
4907 | (setq draw-fn (artist-go-get-draw-fn-from-symbol op)))) | |
4908 | ||
4909 | ;; Draw the new shape | |
4910 | (setq shape (artist-funcall draw-fn x1 y1)) | |
4911 | (artist-move-to-xy x1 y1) | |
4912 | ||
4913 | ;; Start the timer to call `draw-fn' repeatedly every | |
4914 | ;; `interval' second | |
4915 | (if (and interval draw-fn) | |
4916 | (setq timer (run-at-time interval interval draw-fn x1 y1)))) | |
4917 | ||
4918 | ;; Read next event | |
4919 | (setq ev (read-event)))) | |
4920 | ||
4921 | ;; Cancel any timers | |
4922 | (if timer | |
4923 | (cancel-timer timer)) | |
4924 | ||
4925 | (artist-funcall prep-fill-fn x1 y1) | |
4926 | ||
4927 | (if (artist-funcall arrow-pred) | |
4928 | (artist-funcall arrow-set-fn x1 y1) | |
4929 | (artist-clear-arrow-points)) | |
4930 | ||
4931 | (artist-funcall exit-fn x1 y1) | |
4932 | (artist-move-to-xy x1 y1))) | |
4933 | ||
4934 | ||
4935 | ||
4936 | (defun artist-mouse-draw-poly (ev) | |
4937 | "Generic function for shapes requiring several points as input. | |
4938 | The event, EV, is the mouse event." | |
4939 | (interactive "@e") | |
4940 | (message "Mouse-1: set new point, mouse-2: set last point") | |
4941 | (let* ((unshifted (artist-go-get-symbol-shift artist-curr-go nil)) | |
4942 | (shifted (artist-go-get-symbol-shift artist-curr-go t)) | |
4943 | (shift-state (artist-event-is-shifted ev)) | |
4944 | (op (if shift-state shifted unshifted)) | |
4945 | (draw-how (artist-go-get-draw-how-from-symbol op)) | |
4946 | (init-fn (artist-go-get-init-fn-from-symbol op)) | |
4947 | (prep-fill-fn (artist-go-get-prep-fill-fn-from-symbol op)) | |
4948 | (exit-fn (artist-go-get-exit-fn-from-symbol op)) | |
4949 | (draw-fn (artist-go-get-draw-fn-from-symbol op)) | |
4950 | (undraw-fn (artist-go-get-undraw-fn-from-symbol op)) | |
4951 | (fill-pred (artist-go-get-fill-pred-from-symbol op)) | |
4952 | (fill-fn (artist-go-get-fill-fn-from-symbol op)) | |
4953 | (arrow-pred (artist-go-get-arrow-pred-from-symbol op)) | |
4954 | (arrow-set-fn (artist-go-get-arrow-set-fn-from-symbol op)) | |
4955 | (ev-start (event-start ev)) | |
4956 | (initial-win (posn-window ev-start)) | |
4957 | (ev-start-pos (artist-coord-win-to-buf (posn-col-row ev-start))) | |
4958 | (x1-last (car ev-start-pos)) | |
4959 | (y1-last (cdr ev-start-pos)) | |
4960 | (x2 x1-last) | |
4961 | (y2 y1-last) | |
4962 | (is-down t) | |
4963 | (shape nil) | |
4964 | (point-list (list (artist-make-endpoint x1-last y1-last))) | |
4965 | (done nil)) | |
4966 | (select-window (posn-window ev-start)) | |
4967 | (artist-funcall init-fn x1-last y1-last) | |
4968 | (if (not artist-rubber-banding) | |
4969 | (artist-no-rb-set-point1 x1-last y1-last)) | |
4970 | (track-mouse | |
4971 | (while (not done) | |
4972 | ;; decide what to do | |
4973 | (cond | |
4974 | ||
4975 | ;; *** Mouse button is released. | |
4976 | ((and is-down | |
4977 | (or (member 'click (event-modifiers ev)) | |
4978 | (member 'drag (event-modifiers ev)))) | |
4979 | ;; First, if not rubber-banding, draw the line. | |
4980 | ;; | |
4981 | (if (not artist-rubber-banding) | |
4982 | (progn | |
4983 | (artist-no-rb-unset-points) | |
4984 | (setq shape (artist-funcall draw-fn x1-last y1-last x2 y2)))) | |
4985 | ||
4986 | ;; Set the second point to the shape's second point | |
4987 | ;; (which might be different from the mouse's second point, | |
4988 | ;; if, for example, we are drawing a straight line) | |
4989 | ;; | |
4990 | (if (not (null shape)) | |
4991 | (let ((endpoint2 (artist-2point-get-endpoint2 shape))) | |
4992 | (setq x1-last (artist-endpoint-get-x endpoint2)) | |
4993 | (setq y1-last (artist-endpoint-get-y endpoint2)))) | |
4994 | (setq point-list (cons (artist-make-endpoint x1-last y1-last) | |
4995 | point-list)) | |
4996 | (setq shape nil) | |
4997 | (setq is-down nil)) | |
4998 | ||
4999 | ;; *** Mouse button 2 or 3 down | |
5000 | ((and (member 'down (event-modifiers ev)) | |
5001 | (or (equal (event-basic-type ev) 'mouse-2) | |
5002 | (equal (event-basic-type ev) 'mouse-3))) | |
5003 | ;; Ignore | |
5004 | nil) | |
5005 | ||
5006 | ;; *** Mouse button 2 or 3 released | |
5007 | ((and (or (member 'click (event-modifiers ev)) | |
5008 | (member 'drag (event-modifiers ev))) | |
5009 | (or (equal (event-basic-type ev) 'mouse-2) | |
5010 | (equal (event-basic-type ev) 'mouse-3))) | |
5011 | ||
5012 | ;; This means the end of our poly-line drawing-session. | |
5013 | ;; | |
5014 | (setq done t)) | |
5015 | ||
5016 | ;; *** Mouse button 1 went down | |
5017 | ((and (not is-down) | |
5018 | (member 'down (event-modifiers ev)) | |
5019 | (equal (event-basic-type ev) 'mouse-1)) | |
5020 | ;; Check whether the (possibly new, that depends on if shift | |
5021 | ;; has been pressed or released) symbol has the same draw-how | |
5022 | ;; information as the previous had. If it hasn't, we can't | |
5023 | ;; proceed. | |
5024 | ;; | |
5025 | (if (not (eq draw-how | |
5026 | (artist-go-get-draw-how-from-symbol | |
5027 | (if (not shift-state) shifted unshifted)))) | |
5028 | (message "Cannot switch operation") | |
5029 | (progn | |
5030 | ;; Decide operation | |
5031 | ;; | |
5032 | (setq unshifted | |
5033 | (artist-go-get-symbol-shift artist-curr-go nil) | |
5034 | shifted | |
5035 | (artist-go-get-symbol-shift artist-curr-go t) | |
5036 | shift-state (artist-event-is-shifted ev) | |
5037 | op (if shift-state shifted unshifted) | |
5038 | draw-how (artist-go-get-draw-how-from-symbol op) | |
5039 | draw-fn (artist-go-get-draw-fn-from-symbol op) | |
5040 | undraw-fn (artist-go-get-undraw-fn-from-symbol op) | |
5041 | fill-pred (artist-go-get-fill-pred-from-symbol op) | |
5042 | fill-fn (artist-go-get-fill-fn-from-symbol op)) | |
5043 | ||
5044 | ;; Draw shape from last place to this place | |
5045 | ||
5046 | ;; set x2 and y2 | |
5047 | ;; | |
5048 | (setq ev-start-pos (artist-coord-win-to-buf | |
5049 | (posn-col-row (event-start ev)))) | |
5050 | (setq x2 (car ev-start-pos)) | |
5051 | (setq y2 (cdr ev-start-pos)) | |
5052 | ||
5053 | ;; Draw the new shape (if not rubber-banding, place both marks) | |
5054 | ;; | |
5055 | (if artist-rubber-banding | |
5056 | (setq shape (artist-funcall draw-fn x1-last y1-last x2 y2)) | |
5057 | (progn | |
5058 | (artist-no-rb-set-point1 x1-last y1-last) | |
5059 | (artist-no-rb-set-point2 x2 y2))) | |
5060 | ||
5061 | ;; Show new operation in mode-line | |
5062 | (let ((artist-curr-go op)) | |
5063 | (artist-mode-line-show-curr-operation t)))) | |
5064 | ||
5065 | (setq is-down t)) | |
5066 | ||
5067 | ||
5068 | ;; *** Mouse moved, button is down and we are still in orig window | |
5069 | ((and (mouse-movement-p ev) | |
5070 | is-down | |
5071 | (eq initial-win (posn-window (event-start ev)))) | |
5072 | ;; Draw shape from last place to this place | |
5073 | ;; | |
5074 | ;; set x2 and y2 | |
5075 | (setq ev-start-pos (artist-coord-win-to-buf | |
5076 | (posn-col-row (event-start ev)))) | |
5077 | (setq x2 (car ev-start-pos)) | |
5078 | (setq y2 (cdr ev-start-pos)) | |
5079 | ||
5080 | ;; First undraw last shape | |
5081 | ;; (unset last point if not rubberbanding) | |
5082 | ;; | |
5083 | (artist-funcall undraw-fn shape) | |
5084 | ||
5085 | ;; Draw the new shape (if not rubberbanding, set 2nd mark) | |
5086 | ;; | |
5087 | (if artist-rubber-banding | |
5088 | (setq shape (artist-funcall draw-fn x1-last y1-last x2 y2)) | |
5089 | (progn | |
5090 | (artist-no-rb-unset-point2) | |
5091 | (artist-no-rb-set-point2 x2 y2))) | |
5092 | ;; Move cursor | |
5093 | (artist-move-to-xy x2 y2)) | |
5094 | ||
5095 | ;; *** Mouse moved, button is down but we are NOT in orig window | |
5096 | ((and (mouse-movement-p ev) | |
5097 | is-down | |
5098 | (not (eq initial-win (posn-window (event-start ev))))) | |
5099 | ;; Ignore | |
5100 | nil) | |
5101 | ||
5102 | ||
5103 | ;; *** Moving mouse while mouse button is not down | |
5104 | ((and (mouse-movement-p ev) (not is-down)) | |
5105 | ;; don't do anything. | |
5106 | nil) | |
5107 | ||
5108 | ||
5109 | ;; *** Mouse button 1 went down, first time | |
5110 | ((and is-down | |
5111 | (member 'down (event-modifiers ev)) | |
5112 | (equal (event-basic-type ev) 'mouse-1)) | |
5113 | ;; don't do anything | |
5114 | nil) | |
5115 | ||
5116 | ||
5117 | ;; *** Another event | |
5118 | (t | |
5119 | ;; End drawing | |
5120 | ;; | |
5121 | (setq done t))) | |
5122 | ||
5123 | ;; Read next event (only if we should not stop) | |
5124 | (if (not done) | |
5125 | (setq ev (read-event))))) | |
5126 | ||
5127 | ;; Reverse point-list (last points are cond'ed first) | |
5128 | (setq point-list (reverse point-list)) | |
5129 | ||
5130 | (artist-funcall prep-fill-fn point-list) | |
5131 | ||
5132 | ;; Maybe fill | |
5133 | (if (artist-funcall fill-pred) | |
5134 | (artist-funcall fill-fn point-list)) | |
5135 | ||
5136 | ;; Maybe set arrow points | |
5137 | (if (artist-funcall arrow-pred) | |
5138 | (artist-funcall arrow-set-fn point-list) | |
5139 | (artist-clear-arrow-points)) | |
5140 | ||
5141 | (artist-funcall exit-fn point-list) | |
5142 | (artist-move-to-xy x2 y2))) | |
5143 | ||
5144 | ||
5145 | (defun artist-mouse-draw-1point (ev) | |
5146 | "Generic function for shapes requiring only 1 point as input. | |
5147 | Operation is done once. The event, EV, is the mouse event." | |
5148 | (interactive "@e") | |
5149 | (let* ((unshifted (artist-go-get-symbol-shift artist-curr-go nil)) | |
5150 | (shifted (artist-go-get-symbol-shift artist-curr-go t)) | |
5151 | (shift-state (artist-event-is-shifted ev)) | |
5152 | (op (if shift-state shifted unshifted)) | |
5153 | (draw-how (artist-go-get-draw-how-from-symbol op)) | |
5154 | (init-fn (artist-go-get-init-fn-from-symbol op)) | |
5155 | (prep-fill-fn (artist-go-get-prep-fill-fn-from-symbol op)) | |
5156 | (exit-fn (artist-go-get-exit-fn-from-symbol op)) | |
5157 | (draw-fn (artist-go-get-draw-fn-from-symbol op)) | |
5158 | (arrow-pred (artist-go-get-arrow-pred-from-symbol op)) | |
5159 | (arrow-set-fn (artist-go-get-arrow-set-fn-from-symbol op)) | |
5160 | (ev-start (event-start ev)) | |
5161 | (ev-start-pos (artist-coord-win-to-buf (posn-col-row ev-start))) | |
5162 | (x1 (car ev-start-pos)) | |
5163 | (y1 (cdr ev-start-pos))) | |
5164 | (select-window (posn-window ev-start)) | |
5165 | (artist-funcall init-fn x1 y1) | |
5166 | (artist-funcall draw-fn x1 y1) | |
5167 | (artist-funcall prep-fill-fn x1 y1) | |
5168 | (if (artist-funcall arrow-pred) | |
5169 | (artist-funcall arrow-set-fn x1 y1) | |
5170 | (artist-clear-arrow-points)) | |
5171 | (artist-funcall exit-fn x1 y1) | |
5172 | (artist-move-to-xy x1 y1))) | |
5173 | ||
5174 | ||
5175 | (defun artist-mouse-draw-2points (ev) | |
5176 | "Generic function for shapes requiring 2 points as input. | |
5177 | The event, EV, is the mouse event." | |
5178 | (interactive "@e") | |
5179 | (let* ((unshifted (artist-go-get-symbol-shift artist-curr-go nil)) | |
5180 | (shifted (artist-go-get-symbol-shift artist-curr-go t)) | |
5181 | (shift-state (artist-event-is-shifted ev)) | |
5182 | (op (if shift-state shifted unshifted)) | |
5183 | (draw-how (artist-go-get-draw-how-from-symbol op)) | |
5184 | (init-fn (artist-go-get-init-fn-from-symbol op)) | |
5185 | (prep-fill-fn (artist-go-get-prep-fill-fn-from-symbol op)) | |
5186 | (exit-fn (artist-go-get-exit-fn-from-symbol op)) | |
5187 | (draw-fn (artist-go-get-draw-fn-from-symbol op)) | |
5188 | (undraw-fn (artist-go-get-undraw-fn-from-symbol op)) | |
5189 | (fill-pred (artist-go-get-fill-pred-from-symbol op)) | |
5190 | (fill-fn (artist-go-get-fill-fn-from-symbol op)) | |
5191 | (arrow-pred (artist-go-get-arrow-pred-from-symbol op)) | |
5192 | (arrow-set-fn (artist-go-get-arrow-set-fn-from-symbol op)) | |
5193 | (ev-start (event-start ev)) | |
5194 | (initial-win (posn-window ev-start)) | |
5195 | (ev-start-pos (artist-coord-win-to-buf (posn-col-row ev-start))) | |
5196 | (x1 (car ev-start-pos)) | |
5197 | (y1 (cdr ev-start-pos)) | |
5198 | (x2) | |
5199 | (y2) | |
5200 | (shape)) | |
5201 | (select-window (posn-window ev-start)) | |
5202 | (artist-funcall init-fn x1 y1) | |
5203 | (if (not artist-rubber-banding) | |
5204 | (artist-no-rb-set-point1 x1 y1)) | |
5205 | (track-mouse | |
5206 | (while (or (mouse-movement-p ev) | |
5207 | (member 'down (event-modifiers ev))) | |
5208 | (setq ev-start-pos (artist-coord-win-to-buf | |
5209 | (posn-col-row (event-start ev)))) | |
5210 | (setq x2 (car ev-start-pos)) | |
5211 | (setq y2 (cdr ev-start-pos)) | |
5212 | ||
5213 | (if (not (eq initial-win (posn-window (event-start ev)))) | |
5214 | ;; If we moved outside the window, do nothing | |
5215 | nil | |
5216 | ||
5217 | ;; Still in same window: | |
5218 | ;; | |
5219 | ;; First undraw last shape (unset last point if not rubberbanding) | |
5220 | (if artist-rubber-banding | |
5221 | (artist-funcall undraw-fn shape) | |
5222 | (artist-no-rb-unset-point2)) | |
5223 | ||
5224 | ;; Check if user presses or releases shift key | |
5225 | (if (artist-shift-has-changed shift-state ev) | |
5226 | ||
5227 | ;; First check that the draw-how is the same as we | |
5228 | ;; already have. Otherwise, ignore the changed shift-state. | |
5229 | (if (not (eq draw-how | |
5230 | (artist-go-get-draw-how-from-symbol | |
5231 | (if (not shift-state) shifted unshifted)))) | |
5232 | (message "Cannot switch to shifted operation") | |
5233 | ||
5234 | (message "Switching") | |
5235 | ;; progn is "implicit" since this is the else-part | |
5236 | (setq shift-state (not shift-state)) | |
5237 | (setq op (if shift-state shifted unshifted)) | |
5238 | (setq draw-how (artist-go-get-draw-how-from-symbol op)) | |
5239 | (setq draw-fn (artist-go-get-draw-fn-from-symbol op)) | |
5240 | (setq undraw-fn (artist-go-get-undraw-fn-from-symbol op)) | |
5241 | (setq fill-pred (artist-go-get-fill-pred-from-symbol op)) | |
5242 | (setq fill-fn (artist-go-get-fill-fn-from-symbol op)))) | |
5243 | ||
5244 | ;; Draw the new shape | |
5245 | (if artist-rubber-banding | |
5246 | (setq shape (artist-funcall draw-fn x1 y1 x2 y2)) | |
5247 | (artist-no-rb-set-point2 x2 y2)) | |
5248 | ;; Move cursor | |
5249 | (artist-move-to-xy x2 y2)) | |
5250 | ||
5251 | ||
5252 | ;; Read next event | |
5253 | (setq ev (read-event)))) | |
5254 | ||
5255 | ;; If we are not rubber-banding (that is, we were moving around the `2') | |
5256 | ;; draw the shape | |
5257 | (if (not artist-rubber-banding) | |
5258 | (progn | |
5259 | (artist-no-rb-unset-points) | |
5260 | (setq shape (artist-funcall draw-fn x1 y1 x2 y2)))) | |
5261 | ||
5262 | (artist-funcall prep-fill-fn shape x1 y1 x2 y2) | |
5263 | ||
5264 | ;; Maybe fill | |
5265 | (if (artist-funcall fill-pred) | |
5266 | (artist-funcall fill-fn shape x1 y1 x2 y2)) | |
5267 | ||
5268 | ;; Maybe set arrow-points | |
5269 | (if (artist-funcall arrow-pred) | |
5270 | (artist-funcall arrow-set-fn shape x1 y1 x2 y2) | |
5271 | (artist-clear-arrow-points)) | |
5272 | ||
5273 | (artist-funcall exit-fn shape x1 y1 x2 y2) | |
5274 | (artist-move-to-xy x2 y2))) | |
5275 | ||
5276 | ||
5277 | ;; | |
5278 | ;; Bug-report-submitting | |
5279 | ;; | |
5280 | (defun artist-submit-bug-report () | |
5281 | "Submit via mail a bug report on Artist." | |
5282 | (interactive) | |
5283 | (require 'reporter) | |
5284 | (if (y-or-n-p "Do you want to submit a bug report on Artist? ") | |
5285 | (let ((to artist-maintainer-address) | |
5286 | (vars '(window-system | |
5287 | window-system-version | |
5288 | ;; | |
5289 | artist-rubber-banding | |
5290 | artist-interface-with-rect | |
5291 | artist-aspect-ratio | |
5292 | ;; Now the internal ones | |
5293 | artist-curr-go | |
5294 | artist-key-poly-point-list | |
5295 | artist-key-shape | |
5296 | artist-key-draw-how | |
5297 | artist-arrow-point-1 | |
5298 | artist-arrow-point-2))) | |
5299 | ;; Remove those variables from vars that are not bound | |
5300 | (mapcar | |
5301 | (function | |
5302 | (lambda (x) | |
5303 | (if (not (and (boundp x) (symbol-value x))) | |
5304 | (setq vars (delq x vars))))) vars) | |
5305 | (reporter-submit-bug-report | |
5306 | artist-maintainer-address | |
5307 | (concat "artist.el " artist-version) | |
5308 | vars | |
5309 | nil nil | |
5310 | (concat "Hello Tomas,\n\n" | |
5311 | "I have a nice bug report on Artist for you! Here it is:"))))) | |
5312 | ||
5313 | ||
5314 | ;; | |
5315 | ;; Now provide this minor mode | |
5316 | ;; | |
5317 | ||
5318 | (provide 'artist) | |
5319 | ||
5320 | ||
5321 | ;;; About adding drawing modes | |
5322 | ;;; -------------------------- | |
5323 | ||
5324 | ;; If you are going to add a new drawing mode, read the following | |
5325 | ;; sketchy outlines to get started a bit easier. | |
5326 | ;; | |
5327 | ;; 1. If your new drawing mode falls into one of the following | |
5328 | ;; categories, goto point 2, otherwise goto point 3. | |
5329 | ;; | |
5330 | ;; - Modes where the shapes are drawn continously, as long as | |
5331 | ;; the mouse button is held down (continous modes). | |
5332 | ;; Example: the erase-char mode, the pen and pen-line modes. | |
5333 | ;; | |
5334 | ;; - Modes where the shape is made up of from 2 points to an | |
5335 | ;; arbitrary number of points (poly-point modes). | |
5336 | ;; Example: the poly-line mode | |
5337 | ;; | |
5338 | ;; - Modes where the shape is made up of 2 points (2-point | |
5339 | ;; modes). | |
5340 | ;; Example: lines, rectangles | |
5341 | ;; | |
5342 | ;; - Modes where the shape is made up of 1 point (1-point | |
5343 | ;; modes). This mode differs from the continous modes in | |
5344 | ;; that the shape is drawn only once when the mouse button | |
5345 | ;; is pressed. | |
5346 | ;; Examples: paste, a flood-fill, vaporize modes | |
5347 | ;; | |
5348 | ;; | |
5349 | ;; 2. To make it easier and more flexible to program new drawing | |
5350 | ;; modes, you might choose to specify | |
5351 | ;; init-fn: a function to be called at the very beginning | |
5352 | ;; of the drawing phase, | |
5353 | ;; prep-fill-fn: a function to be called before filling, | |
5354 | ;; arrow-set-fn: a function for setting arrows, to be called | |
5355 | ;; after filling, and | |
5356 | ;; exit-fn: a function to be called at the very end of | |
5357 | ;; the drawing phase. | |
5358 | ;; For each of the cases below, the arguments given to the init-fn, | |
5359 | ;; prep-fill-fn, arrow-set-fn and exit-fn are stated. | |
5360 | ;; | |
5361 | ;; If your mode matches the continous mode or the 1-point mode: | |
5362 | ;; | |
5363 | ;; a. Create a draw-function that draws your shape. Your function | |
5364 | ;; must take x and y as arguments. The return value is not | |
5365 | ;; used. | |
5366 | ;; | |
5367 | ;; b. Add your mode to the master table, `artist-mt'. | |
5368 | ;; | |
5369 | ;; init-fn: x y | |
5370 | ;; prep-fill-fn: x y | |
5371 | ;; arrow-set-fn: x y | |
5372 | ;; exit-fn: x y | |
5373 | ;; | |
5374 | ;; If your mode matches the 2-point mode: | |
5375 | ;; | |
5376 | ;; a. Create one draw-function that draws your shape and one | |
5377 | ;; undraw-function that undraws it. | |
5378 | ;; | |
5379 | ;; The draw-function must take x1, y1, x2 and y2 as | |
5380 | ;; arguments. It must return a list with three elements: | |
5381 | ;; Endpoint1: a vector [x1 y1] | |
5382 | ;; Endpoint2: a vector [x2 y2] | |
5383 | ;; Shapeinfo: all info necessary for your undraw-function to | |
5384 | ;; be able to undraw the shape | |
5385 | ;; Use the artist-endpoint-* accessors to create and inspect | |
5386 | ;; the endpoints. | |
5387 | ;; | |
5388 | ;; If applicable, you must be able to draw your shape without | |
5389 | ;; borders if the `artist-borderless-shapes' is non-nil. | |
5390 | ;; See `artist-draw-rect' for an example. | |
5391 | ;; | |
5392 | ;; The undraw-function must take one argument: the list created | |
5393 | ;; by your draw-function. The return value is not used. | |
5394 | ;; | |
5395 | ;; b. If you want to provide a fill-function, then create a | |
5396 | ;; function that takes 5 arguments: the list created by your | |
5397 | ;; draw-function, x1, y1, x2 and y2. The return value is not | |
5398 | ;; used. | |
5399 | ;; | |
5400 | ;; c. Add your mode to the master table, `artist-mt'. | |
5401 | ;; | |
5402 | ;; init-fn: x1 y1 | |
5403 | ;; prep-fill-fn: shape x1 y1 x2 y2 | |
5404 | ;; arrow-set-fn: shape x1 y1 x2 y2 | |
5405 | ;; exit-fn: shape x1 y1 x2 y2 | |
5406 | ;; | |
5407 | ;; If your mode matches the poly-point mode: | |
5408 | ;; | |
5409 | ;; a. Create one draw-function that draws your shape and one | |
5410 | ;; undraw-function that undraws it. The draw- and | |
5411 | ;; undraw-functions are used to to draw/undraw a segment of | |
5412 | ;; your poly-point mode between 2 points. The draw- and | |
5413 | ;; undraw-functions are then really 2-point mode functions. | |
5414 | ;; They must take the same arguments and return the same | |
5415 | ;; values as those of the 2-point mode. | |
5416 | ;; | |
5417 | ;; If applicable, you must be able to draw your shape without | |
5418 | ;; borders if the `artist-borderless-shapes' is non-nil. | |
5419 | ;; See `artist-draw-rect' for an example. | |
5420 | ;; | |
5421 | ;; b. If you want to provide a fill-function, then create a | |
5422 | ;; function that takes 1 argument: a list of points where each | |
5423 | ;; point is a vector, [x, y]. | |
5424 | ;; | |
5425 | ;; c. Add your mode to the master table, `artist-mt'. | |
5426 | ;; | |
5427 | ;; init-fn: x1 y1 | |
5428 | ;; prep-fill-fn: point-list | |
5429 | ;; arrow-set-fn: point-list | |
5430 | ;; exit-fn: point-list | |
5431 | ;; | |
5432 | ;; The arrow-set-fn must set the variables `artist-arrow-point-1' | |
5433 | ;; and `artist-arrow-point-2'. If your mode does not take arrows, | |
5434 | ;; you must set the variables to nil. Use the accessors | |
5435 | ;; artist-arrow-point-* to create and inspect arrow-points. | |
5436 | ;; | |
5437 | ;; | |
5438 | ;; 3. If your mode doesn't match any of the categories, you are facing | |
5439 | ;; a bit more work, and I cannot be as detailed as above. Here is a | |
5440 | ;; brief outline of what you have to do: | |
5441 | ;; | |
5442 | ;; a. Decide on a name for your type of mode. Let's assume that | |
5443 | ;; you decided on `xxx'. Then you should use the draw-how | |
5444 | ;; symbol artist-do-xxx. | |
5445 | ;; | |
5446 | ;; b. Create a function artist-mouse-draw-xxx for drawing with | |
5447 | ;; mouse. It should be called from `artist-down-mouse-1'. | |
5448 | ;; | |
5449 | ;; The all coordinates must be converted from window-relative | |
5450 | ;; to buffer relative before saved or handed over to | |
5451 | ;; any other function. Converting is done with | |
5452 | ;; the function `artist-coord-win-to-buf'. | |
5453 | ;; | |
5454 | ;; It must take care to the `artist-rubber-banding' variable | |
5455 | ;; and perform rubber-banding accordingly. Use the | |
5456 | ;; artist-no-rb-* functions if not rubber-banding. | |
5457 | ;; | |
5458 | ;; If applicable, you must be able to draw your shape without | |
5459 | ;; borders if the `artist-borderless-shapes' is non-nil. | |
5460 | ;; See `artist-draw-rect' for an example. | |
5461 | ;; | |
5462 | ;; You must call the init-fn, the prep-fill-fn, arrow-set-fn | |
5463 | ;; and the exit-fn at the apropriate points. | |
5464 | ;; | |
5465 | ;; When artist-mouse-draw-xxx ends, the shape for your mode | |
5466 | ;; must be completely drawn. | |
5467 | ;; | |
5468 | ;; c. Create functions for drawing with keys: | |
5469 | ;; | |
5470 | ;; - artist-key-set-point-xxx for setting a point in the | |
5471 | ;; mode, to be called from `artist-key-set-point-common'. | |
5472 | ;; | |
5473 | ;; - artist-key-do-continously-xxx to be called from | |
5474 | ;; `artist-key-do-continously-common' whenever the user | |
5475 | ;; moves around. | |
5476 | ;; | |
5477 | ;; As for the artist-mouse-draw-xxx, these two functions must | |
5478 | ;; take care to do rubber-banding, borderless shapes and to | |
5479 | ;; set arrows. | |
5480 | ;; | |
5481 | ;; These functions should set the variable `artist-key-shape' | |
5482 | ;; to the shape drawn. | |
5483 | ;; | |
5484 | ;; d. Create artist-key-draw-xxx and artist-key-undraw-xxx for | |
5485 | ;; drawing and undrawing. These are needed when the user | |
5486 | ;; switches operation to draw another shape of the same type | |
5487 | ;; of drawing mode. | |
5488 | ;; | |
5489 | ;; You should provide these functions. You might think that | |
5490 | ;; only you is using your type of mode, so noone will be able | |
5491 | ;; to switch to another operation of the same type of mode, | |
5492 | ;; but someone else might base a new drawing mode upon your | |
5493 | ;; work. | |
5494 | ;; | |
5495 | ;; You must call the init-fn, the prep-fill-fn, arrow-set-fn | |
5496 | ;; and the exit-fn at the apropriate points. | |
5497 | ;; | |
5498 | ;; e. Add your new mode to the master table, `artist-mt'. | |
5499 | ;; | |
5500 | ;; | |
5501 | ;; Happy hacking! Please let me hear if you add any drawing modes! | |
5502 | ;; Don't hesitate to ask me any questions. | |
5503 | ||
5504 | ||
5505 | ;; artist.el ends here |