-
Notifications
You must be signed in to change notification settings - Fork 6
/
Copy pathkite-color.el
507 lines (462 loc) · 22.2 KB
/
kite-color.el
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
;;; kite-color.el --- Color-related functions for Kite
;; Copyright (C) 2012 Julian Scheid
;; Author: Julian Scheid <[email protected]>
;; Keywords: tools
;; Package: kite
;; Compatibility: GNU Emacs 24
;; This file is not part of GNU Emacs.
;; Kite is free software: you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; Kite is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
;; License for more details.
;; You should have received a copy of the GNU General Public License
;; along with Kite. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This package provides functions for parsing and generating color
;; representations according to the CSS3 Color Module, as well as
;; visualizing colors with and without alpha channel.
;;
;; It is part of Kite, a WebKit inspector front-end.
;;; Code:
(require 'cl)
(require 'color)
(eval-when-compile
(require 'rx))
(defun* kite--make-color-image
(rgba-float-color
&key
(width 16)
(height 16)
(checker-size 8)
(bg-color-1 (color-hsl-to-rgb 0 0 1))
(bg-color-2 (color-hsl-to-rgb 0 0 0.5)))
"Return an image that visualizes the given RGBA-FLOAT-COLOR,
which should be a list containing four float values in the range
0..1.
WIDTH and HEIGHT determine the image dimensions in pixels.
Colors with an alpha value less than one (i.e. semi-transparent
colors) will be shown superimposed on top of a checkerboard.
CHECKER-SIZE gives the size of each checkerboard tile in pixels,
and BG-COLOR-1 and BG-COLOR-2 are lists consisting of three
floating point values each, giving the RGB color values to use
for the checkerboard tiles."
(create-image
(with-output-to-string
(let ((scale 255)
(row 0)
(bg-color-list (list bg-color-1 bg-color-2))
(alpha (nth 3 rgba-float-color)))
(princ (format "P3\n%d %d\n%d\n" width height scale))
(while (< row height)
(let ((column 0))
(while (< column width)
(let ((bg-color (nth
(logxor (mod (/ column checker-size) 2)
(mod (/ row checker-size) 2))
bg-color-list)))
(dolist (component
(mapcar* (lambda (fg bg)
(+ (* fg alpha)
(* bg (- 1 alpha))))
rgba-float-color bg-color))
(princ (format "%d " (round (* scale component)))))
(setq column (1+ column)))))
(princ "\n")
(setq row (1+ row)))))
'pbm t))
(eval-when-compile
(defconst kite--color-keywords
(let ((table (make-hash-table :test 'equal)))
;; 4.1. HTML4 color keywords
(puthash "black" (color-name-to-rgb "#000000") table)
(puthash "green" (color-name-to-rgb "#008000") table)
(puthash "silver" (color-name-to-rgb "#C0C0C0") table)
(puthash "lime" (color-name-to-rgb "#00FF00") table)
(puthash "gray" (color-name-to-rgb "#808080") table)
(puthash "olive" (color-name-to-rgb "#808000") table)
(puthash "white" (color-name-to-rgb "#FFFFFF") table)
(puthash "yellow" (color-name-to-rgb "#FFFF00") table)
(puthash "maroon" (color-name-to-rgb "#800000") table)
(puthash "navy" (color-name-to-rgb "#000080") table)
(puthash "red" (color-name-to-rgb "#FF0000") table)
(puthash "blue" (color-name-to-rgb "#0000FF") table)
(puthash "purple" (color-name-to-rgb "#800080") table)
(puthash "teal" (color-name-to-rgb "#008080") table)
(puthash "fuchsia" (color-name-to-rgb "#FF00FF") table)
(puthash "aqua" (color-name-to-rgb "#00FFFF") table)
;; 4.2.3. 'transparent' color keyword
(puthash "transparent" '(0 0 0 0) table)
;; 4.3. SVG color keywords
(puthash "aliceblue" (color-name-to-rgb "#F0F8FF") table)
(puthash "antiquewhite" (color-name-to-rgb "#FAEBD7") table)
(puthash "aqua" (color-name-to-rgb "#00FFFF") table)
(puthash "aquamarine" (color-name-to-rgb "#7FFFD4") table)
(puthash "azure" (color-name-to-rgb "#F0FFFF") table)
(puthash "beige" (color-name-to-rgb "#F5F5DC") table)
(puthash "bisque" (color-name-to-rgb "#FFE4C4") table)
(puthash "black" (color-name-to-rgb "#000000") table)
(puthash "blanchedalmond" (color-name-to-rgb "#FFEBCD") table)
(puthash "blue" (color-name-to-rgb "#0000FF") table)
(puthash "blueviolet" (color-name-to-rgb "#8A2BE2") table)
(puthash "brown" (color-name-to-rgb "#A52A2A") table)
(puthash "burlywood" (color-name-to-rgb "#DEB887") table)
(puthash "cadetblue" (color-name-to-rgb "#5F9EA0") table)
(puthash "chartreuse" (color-name-to-rgb "#7FFF00") table)
(puthash "chocolate" (color-name-to-rgb "#D2691E") table)
(puthash "coral" (color-name-to-rgb "#FF7F50") table)
(puthash "cornflowerblue" (color-name-to-rgb "#6495ED") table)
(puthash "cornsilk" (color-name-to-rgb "#FFF8DC") table)
(puthash "crimson" (color-name-to-rgb "#DC143C") table)
(puthash "cyan" (color-name-to-rgb "#00FFFF") table)
(puthash "darkblue" (color-name-to-rgb "#00008B") table)
(puthash "darkcyan" (color-name-to-rgb "#008B8B") table)
(puthash "darkgoldenrod" (color-name-to-rgb "#B8860B") table)
(puthash "darkgray" (color-name-to-rgb "#A9A9A9") table)
(puthash "darkgreen" (color-name-to-rgb "#006400") table)
(puthash "darkgrey" (color-name-to-rgb "#A9A9A9") table)
(puthash "darkkhaki" (color-name-to-rgb "#BDB76B") table)
(puthash "darkmagenta" (color-name-to-rgb "#8B008B") table)
(puthash "darkolivegreen" (color-name-to-rgb "#556B2F") table)
(puthash "darkorange" (color-name-to-rgb "#FF8C00") table)
(puthash "darkorchid" (color-name-to-rgb "#9932CC") table)
(puthash "darkred" (color-name-to-rgb "#8B0000") table)
(puthash "darksalmon" (color-name-to-rgb "#E9967A") table)
(puthash "darkseagreen" (color-name-to-rgb "#8FBC8F") table)
(puthash "darkslateblue" (color-name-to-rgb "#483D8B") table)
(puthash "darkslategray" (color-name-to-rgb "#2F4F4F") table)
(puthash "darkslategrey" (color-name-to-rgb "#2F4F4F") table)
(puthash "darkturquoise" (color-name-to-rgb "#00CED1") table)
(puthash "darkviolet" (color-name-to-rgb "#9400D3") table)
(puthash "deeppink" (color-name-to-rgb "#FF1493") table)
(puthash "deepskyblue" (color-name-to-rgb "#00BFFF") table)
(puthash "dimgray" (color-name-to-rgb "#696969") table)
(puthash "dimgrey" (color-name-to-rgb "#696969") table)
(puthash "dodgerblue" (color-name-to-rgb "#1E90FF") table)
(puthash "firebrick" (color-name-to-rgb "#B22222") table)
(puthash "floralwhite" (color-name-to-rgb "#FFFAF0") table)
(puthash "forestgreen" (color-name-to-rgb "#228B22") table)
(puthash "fuchsia" (color-name-to-rgb "#FF00FF") table)
(puthash "gainsboro" (color-name-to-rgb "#DCDCDC") table)
(puthash "ghostwhite" (color-name-to-rgb "#F8F8FF") table)
(puthash "gold" (color-name-to-rgb "#FFD700") table)
(puthash "goldenrod" (color-name-to-rgb "#DAA520") table)
(puthash "gray" (color-name-to-rgb "#808080") table)
(puthash "green" (color-name-to-rgb "#008000") table)
(puthash "greenyellow" (color-name-to-rgb "#ADFF2F") table)
(puthash "grey" (color-name-to-rgb "#808080") table)
(puthash "honeydew" (color-name-to-rgb "#F0FFF0") table)
(puthash "hotpink" (color-name-to-rgb "#FF69B4") table)
(puthash "indianred" (color-name-to-rgb "#CD5C5C") table)
(puthash "indigo" (color-name-to-rgb "#4B0082") table)
(puthash "ivory" (color-name-to-rgb "#FFFFF0") table)
(puthash "khaki" (color-name-to-rgb "#F0E68C") table)
(puthash "lavender" (color-name-to-rgb "#E6E6FA") table)
(puthash "lavenderblush" (color-name-to-rgb "#FFF0F5") table)
(puthash "lawngreen" (color-name-to-rgb "#7CFC00") table)
(puthash "lemonchiffon" (color-name-to-rgb "#FFFACD") table)
(puthash "lightblue" (color-name-to-rgb "#ADD8E6") table)
(puthash "lightcoral" (color-name-to-rgb "#F08080") table)
(puthash "lightcyan" (color-name-to-rgb "#E0FFFF") table)
(puthash "lightgoldenrodyellow" (color-name-to-rgb "#FAFAD2") table)
(puthash "lightgray" (color-name-to-rgb "#D3D3D3") table)
(puthash "lightgreen" (color-name-to-rgb "#90EE90") table)
(puthash "lightgrey" (color-name-to-rgb "#D3D3D3") table)
(puthash "lightpink" (color-name-to-rgb "#FFB6C1") table)
(puthash "lightsalmon" (color-name-to-rgb "#FFA07A") table)
(puthash "lightseagreen" (color-name-to-rgb "#20B2AA") table)
(puthash "lightskyblue" (color-name-to-rgb "#87CEFA") table)
(puthash "lightslategray" (color-name-to-rgb "#778899") table)
(puthash "lightslategrey" (color-name-to-rgb "#778899") table)
(puthash "lightsteelblue" (color-name-to-rgb "#B0C4DE") table)
(puthash "lightyellow" (color-name-to-rgb "#FFFFE0") table)
(puthash "lime" (color-name-to-rgb "#00FF00") table)
(puthash "limegreen" (color-name-to-rgb "#32CD32") table)
(puthash "linen" (color-name-to-rgb "#FAF0E6") table)
(puthash "magenta" (color-name-to-rgb "#FF00FF") table)
(puthash "maroon" (color-name-to-rgb "#800000") table)
(puthash "mediumaquamarine" (color-name-to-rgb "#66CDAA") table)
(puthash "mediumblue" (color-name-to-rgb "#0000CD") table)
(puthash "mediumorchid" (color-name-to-rgb "#BA55D3") table)
(puthash "mediumpurple" (color-name-to-rgb "#9370DB") table)
(puthash "mediumseagreen" (color-name-to-rgb "#3CB371") table)
(puthash "mediumslateblue" (color-name-to-rgb "#7B68EE") table)
(puthash "mediumspringgreen" (color-name-to-rgb "#00FA9A") table)
(puthash "mediumturquoise" (color-name-to-rgb "#48D1CC") table)
(puthash "mediumvioletred" (color-name-to-rgb "#C71585") table)
(puthash "midnightblue" (color-name-to-rgb "#191970") table)
(puthash "mintcream" (color-name-to-rgb "#F5FFFA") table)
(puthash "mistyrose" (color-name-to-rgb "#FFE4E1") table)
(puthash "moccasin" (color-name-to-rgb "#FFE4B5") table)
(puthash "navajowhite" (color-name-to-rgb "#FFDEAD") table)
(puthash "navy" (color-name-to-rgb "#000080") table)
(puthash "oldlace" (color-name-to-rgb "#FDF5E6") table)
(puthash "olive" (color-name-to-rgb "#808000") table)
(puthash "olivedrab" (color-name-to-rgb "#6B8E23") table)
(puthash "orange" (color-name-to-rgb "#FFA500") table)
(puthash "orangered" (color-name-to-rgb "#FF4500") table)
(puthash "orchid" (color-name-to-rgb "#DA70D6") table)
(puthash "palegoldenrod" (color-name-to-rgb "#EEE8AA") table)
(puthash "palegreen" (color-name-to-rgb "#98FB98") table)
(puthash "paleturquoise" (color-name-to-rgb "#AFEEEE") table)
(puthash "palevioletred" (color-name-to-rgb "#DB7093") table)
(puthash "papayawhip" (color-name-to-rgb "#FFEFD5") table)
(puthash "peachpuff" (color-name-to-rgb "#FFDAB9") table)
(puthash "peru" (color-name-to-rgb "#CD853F") table)
(puthash "pink" (color-name-to-rgb "#FFC0CB") table)
(puthash "plum" (color-name-to-rgb "#DDA0DD") table)
(puthash "powderblue" (color-name-to-rgb "#B0E0E6") table)
(puthash "purple" (color-name-to-rgb "#800080") table)
(puthash "red" (color-name-to-rgb "#FF0000") table)
(puthash "rosybrown" (color-name-to-rgb "#BC8F8F") table)
(puthash "royalblue" (color-name-to-rgb "#4169E1") table)
(puthash "saddlebrown" (color-name-to-rgb "#8B4513") table)
(puthash "salmon" (color-name-to-rgb "#FA8072") table)
(puthash "sandybrown" (color-name-to-rgb "#F4A460") table)
(puthash "seagreen" (color-name-to-rgb "#2E8B57") table)
(puthash "seashell" (color-name-to-rgb "#FFF5EE") table)
(puthash "sienna" (color-name-to-rgb "#A0522D") table)
(puthash "silver" (color-name-to-rgb "#C0C0C0") table)
(puthash "skyblue" (color-name-to-rgb "#87CEEB") table)
(puthash "slateblue" (color-name-to-rgb "#6A5ACD") table)
(puthash "slategray" (color-name-to-rgb "#708090") table)
(puthash "slategrey" (color-name-to-rgb "#708090") table)
(puthash "snow" (color-name-to-rgb "#FFFAFA") table)
(puthash "springgreen" (color-name-to-rgb "#00FF7F") table)
(puthash "steelblue" (color-name-to-rgb "#4682B4") table)
(puthash "tan" (color-name-to-rgb "#D2B48C") table)
(puthash "teal" (color-name-to-rgb "#008080") table)
(puthash "thistle" (color-name-to-rgb "#D8BFD8") table)
(puthash "tomato" (color-name-to-rgb "#FF6347") table)
(puthash "turquoise" (color-name-to-rgb "#40E0D0") table)
(puthash "violet" (color-name-to-rgb "#EE82EE") table)
(puthash "wheat" (color-name-to-rgb "#F5DEB3") table)
(puthash "white" (color-name-to-rgb "#FFFFFF") table)
(puthash "whitesmoke" (color-name-to-rgb "#F5F5F5") table)
(puthash "yellow" (color-name-to-rgb "#FFFF00") table)
(puthash "yellowgreen" (color-name-to-rgb "#9ACD32") table)
table)
"Hash map from lower-case CSS3 color keywords to the
corresponding RGB or (in the case of `transparent') RGBA values,
with each color component a float value in the range 0..1."))
(defconst kite-color-regexp
;; Shortcuts for use in the regex
(eval-when-compile
(let ((rx-constituents
(append rx-constituents
(list
(cons 'integer-ws
(rx (0+ (syntax whitespace))
(group
(opt "-")
(or (sequence (1+ digit)
(opt "." (0+ digit)))
(sequence "." (1+ digit))))
(0+ (syntax whitespace))))
(cons 'float-ws
(rx (0+ (syntax whitespace))
(group
(opt "-")
(or (sequence (1+ digit)
(opt "." (0+ digit)))
(sequence "." (1+ digit))))
(0+ (syntax whitespace))))
(cons 'percent-ws
(rx (0+ (syntax whitespace))
(group
(opt "-")
(1+ digit))
(0+ (syntax whitespace))
"%"
(0+ (syntax whitespace))))))))
(rx-to-string
`(: string-start
(or
;; 4.1. HTML4 color keywords
;; 4.2.3. 'transparent' color keywords
;; 4.3 SVG color keywords
(group ; 1
,(append
'(or)
(let ((keys))
(maphash (lambda (key value)
(setq keys
(cons
(append
'(sequence)
(mapcar
(lambda (chr) (list 'char
(downcase chr)
(upcase chr)))
(string-to-list key)))
keys)))
(eval-when-compile kite--color-keywords))
keys)))
;; 4.2.1. RGB color values
;; #FFFFFF notation
(group ; 2
"#"
(= 6 hex-digit))
;; #FFF notation
(group ; 3
"#"
(= 3 hex-digit))
;; rgb notation, 0-255 values
(: "rgb("
integer-ws ; 4
","
integer-ws ; 5
","
integer-ws ; 6
")")
;; rgb notation, 0%-100% values
(: "rgb("
percent-ws ; 7
","
percent-ws ; 8
","
percent-ws ; 9
")")
;; 4.2.2. RGBA color values
;; rgba notation, 0-255 values
(: "rgba("
integer-ws ; 10
","
integer-ws ; 11
","
integer-ws ; 12
","
float-ws ; 13
")")
;; rgba notation, 0%-100% values
(: "rgba("
percent-ws ; 14
","
percent-ws ; 15
","
percent-ws ; 16
","
float-ws ; 17
")")
;; 4.2.4 HSL color values
(: "hsl("
integer-ws ; 18
","
percent-ws ; 19
","
percent-ws ; 20
")")
;; 4.2.5 HSLA color values
(: "hsla("
integer-ws ; 21
","
percent-ws ; 22
","
percent-ws ; 23
","
float-ws ; 24
")"))
string-end))))
"Regular expression matching any of the color representations
described in the CSS3 Color Module")
(defun kite-parse-color-match (string)
"Return the RGB or RGBA color values corresponding to the color
last matched by `kite-color-regexp', as per the CSS3 Color
Module (W3C Candidate Recommendation 14 May 2003) section 4. See
http://www.w3.org/TR/2003/CR-css3-color-20030514 .
STRING should be given if the last search was by `string-match'
on STRING. If STRING is nil, the current buffer should be the
same buffer the search/match was performed in.
HSL values will be converted to RGB, and all components will be
normalized and clamped to the range 0..1 as per the spec.
The returned value is either a list of three float values in the
range 0..1 corresponding to red, green, and blue components (if
the matched color did not have an alpha component) or a list of
four float values in the range 0..1 corresponding to red, green,
blue, and alpha otherwise. This function does not deal in color
spaces or color profiles and thus its result should be treated as
a 'raw' color value."
(flet
((clamp (n)
(max 0.0 (min 1.0 n)))
(color-hue-to-rgb (v1 v2 h)
(cond
((< h 0) (setq h (+ h 1)))
((> h 1) (setq h (- h 1))))
(cond
((< h (/ 1.0 6))
(+ v1 (* (- v2 v1) h 6.0)))
((< h 0.5)
v2)
((< h (/ 2.0 3))
(+ v1 (* (- v2 v1) (- (/ 2.0 3) h) 6.0)))
(t
v1))))
(cond
;; color keyword
((match-string 1 string)
(gethash (match-string 1 string) (eval-when-compile kite--color-keywords)))
;; #FFFFFF
((match-string 2 string)
(color-name-to-rgb (match-string 2 string)))
;; #FFF
((match-string 3 string)
(let ((match (match-string 3 string)))
(list (/ (string-to-number (substring match 1 2) 16) 15.0)
(/ (string-to-number (substring match 2 3) 16) 15.0)
(/ (string-to-number (substring match 3 4) 16) 15.0))))
;; rgb(n,n,n)
((match-string 4 string)
(list (clamp (/ (string-to-number (match-string 4 string)) 255.0))
(clamp (/ (string-to-number (match-string 5 string)) 255.0))
(clamp (/ (string-to-number (match-string 6 string)) 255.0))))
;; rgb(n%,n%,n%)
((match-string 7 string)
(list (clamp (/ (string-to-number (match-string 7 string)) 100.0))
(clamp (/ (string-to-number (match-string 8 string)) 100.0))
(clamp (/ (string-to-number (match-string 9 string)) 100.0))))
;; rgba(n,n,n,a)
((match-string 10 string)
(list (clamp (/ (string-to-number (match-string 10 string)) 255.0))
(clamp (/ (string-to-number (match-string 11 string)) 255.0))
(clamp (/ (string-to-number (match-string 12 string)) 255.0))
(clamp (string-to-number (match-string 13 string)))))
;; rgba(n%,n%,n%,a)
((match-string 14 string)
(list (clamp (/ (string-to-number (match-string 14 string)) 100.0))
(clamp (/ (string-to-number (match-string 15 string)) 100.0))
(clamp (/ (string-to-number (match-string 16 string)) 100.0))
(clamp (string-to-number (match-string 17 string)))))
;; hsl(n,n%,n%)
((match-string 18 string)
(mapcar #'clamp
(color-hsl-to-rgb
(mod (/ (string-to-number (match-string 18 string)) 360.0) 1.0)
(clamp (/ (string-to-number (match-string 19 string)) 100.0))
(clamp (/ (string-to-number (match-string 20 string)) 100.0)))))
;; hsla(n,n%,n%,a)
((match-string 21 string)
(append
(mapcar #'clamp
(color-hsl-to-rgb
(mod (/ (string-to-number (match-string 21 string)) 360.0) 1.0)
(clamp (/ (string-to-number (match-string 22 string)) 100.0))
(clamp (/ (string-to-number (match-string 23 string)) 100.0))))
(list
(clamp (string-to-number (match-string 24 string)))))))))
(defun kite-parse-color (string)
(when (let ((case-fold-search nil))
(string-match kite-color-regexp string))
(kite-parse-color-match string)))
(defun kite--rgba-value (color)
"If COLOR is an RGB triplet, turn it into an RGBA quadruplet by
appending an alpha value of 1. Otherwise, return the value
as-is"
(if (eq 3 (length color))
(append color (list 1))
color))
(provide 'kite-color)
;;; kite-color.el ends here