1 /*!
2 * jQuery Color Animations v2.1.1
3 * https://github.com/jquery/jquery-color
4 *
5 * Copyright 2012 jQuery Foundation and other contributors
6 * Released under the MIT license.
7 * http://jquery.org/license
8 *
9 * Date: Sun Oct 28 15:08:06 2012 -0400
10 */
11 (function( jQuery, undefined ) {
12
13 var stepHooks = "backgroundColor borderBottomColor borderLeftColor borderRightColor borderTopColor color columnRuleColor outlineColor textDecorationColor textEmphasisColor",
14
15 // plusequals test for += 100 -= 100
16 rplusequals = /^([\-+])=\s*(\d+\.?\d*)/,
17 // a set of RE's that can match strings and generate color tuples.
18 stringParsers = [{
19 re: /rgba?\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*(?:,\s*(\d?(?:\.\d+)?)\s*)?\)/,
20 parse: function( execResult ) {
21 return [
22 execResult[ 1 ],
23 execResult[ 2 ],
24 execResult[ 3 ],
25 execResult[ 4 ]
26 ];
27 }
28 }, {
29 re: /rgba?\(\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d?(?:\.\d+)?)\s*)?\)/,
30 parse: function( execResult ) {
31 return [
32 execResult[ 1 ] * 2.55,
33 execResult[ 2 ] * 2.55,
34 execResult[ 3 ] * 2.55,
35 execResult[ 4 ]
36 ];
37 }
38 }, {
39 // this regex ignores A-F because it's compared against an already lowercased string
40 re: /#([a-f0-9]{2})([a-f0-9]{2})([a-f0-9]{2})/,
41 parse: function( execResult ) {
42 return [
43 parseInt( execResult[ 1 ], 16 ),
44 parseInt( execResult[ 2 ], 16 ),
45 parseInt( execResult[ 3 ], 16 )
46 ];
47 }
48 }, {
49 // this regex ignores A-F because it's compared against an already lowercased string
50 re: /#([a-f0-9])([a-f0-9])([a-f0-9])/,
51 parse: function( execResult ) {
52 return [
53 parseInt( execResult[ 1 ] + execResult[ 1 ], 16 ),
54 parseInt( execResult[ 2 ] + execResult[ 2 ], 16 ),
55 parseInt( execResult[ 3 ] + execResult[ 3 ], 16 )
56 ];
57 }
58 }, {
59 re: /hsla?\(\s*(\d+(?:\.\d+)?)\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d?(?:\.\d+)?)\s*)?\)/,
60 space: "hsla",
61 parse: function( execResult ) {
62 return [
63 execResult[ 1 ],
64 execResult[ 2 ] / 100,
65 execResult[ 3 ] / 100,
66 execResult[ 4 ]
67 ];
68 }
69 }],
70
71 // jQuery.Color( )
72 color = jQuery.Color = function( color, green, blue, alpha ) {
73 return new jQuery.Color.fn.parse( color, green, blue, alpha );
74 },
75 spaces = {
76 rgba: {
77 props: {
78 red: {
79 idx: 0,
80 type: "byte"
81 },
82 green: {
83 idx: 1,
84 type: "byte"
85 },
86 blue: {
87 idx: 2,
88 type: "byte"
89 }
90 }
91 },
92
93 hsla: {
94 props: {
95 hue: {
96 idx: 0,
97 type: "degrees"
98 },
99 saturation: {
100 idx: 1,
101 type: "percent"
102 },
103 lightness: {
104 idx: 2,
105 type: "percent"
106 }
107 }
108 }
109 },
110 propTypes = {
111 "byte": {
112 floor: true,
113 max: 255
114 },
115 "percent": {
116 max: 1
117 },
118 "degrees": {
119 mod: 360,
120 floor: true
121 }
122 },
123 support = color.support = {},
124
125 // element for support tests
126 supportElem = jQuery( "<p>" )[ 0 ],
127
128 // colors = jQuery.Color.names
129 colors,
130
131 // local aliases of functions called often
132 each = jQuery.each;
133
134 // determine rgba support immediately
135 supportElem.style.cssText = "background-color:rgba(1,1,1,.5)";
136 support.rgba = supportElem.style.backgroundColor.indexOf( "rgba" ) > -1;
137
138 // define cache name and alpha properties
139 // for rgba and hsla spaces
140 each( spaces, function( spaceName, space ) {
141 space.cache = "_" + spaceName;
142 space.props.alpha = {
143 idx: 3,
144 type: "percent",
145 def: 1
146 };
147 });
148
149 function clamp( value, prop, allowEmpty ) {
150 var type = propTypes[ prop.type ] || {};
151
152 if ( value == null ) {
153 return (allowEmpty || !prop.def) ? null : prop.def;
154 }
155
156 // ~~ is an short way of doing floor for positive numbers
157 value = type.floor ? ~~value : parseFloat( value );
158
159 // IE will pass in empty strings as value for alpha,
160 // which will hit this case
161 if ( isNaN( value ) ) {
162 return prop.def;
163 }
164
165 if ( type.mod ) {
166 // we add mod before modding to make sure that negatives values
167 // get converted properly: -10 -> 350
168 return (value + type.mod) % type.mod;
169 }
170
171 // for now all property types without mod have min and max
172 return 0 > value ? 0 : type.max < value ? type.max : value;
173 }
174
175 function stringParse( string ) {
176 var inst = color(),
177 rgba = inst._rgba = [];
178
179 string = string.toLowerCase();
180
181 each( stringParsers, function( i, parser ) {
182 var parsed,
183 match = parser.re.exec( string ),
184 values = match && parser.parse( match ),
185 spaceName = parser.space || "rgba";
186
187 if ( values ) {
188 parsed = inst[ spaceName ]( values );
189
190 // if this was an rgba parse the assignment might happen twice
191 // oh well....
192 inst[ spaces[ spaceName ].cache ] = parsed[ spaces[ spaceName ].cache ];
193 rgba = inst._rgba = parsed._rgba;
194
195 // exit each( stringParsers ) here because we matched
196 return false;
197 }
198 });
199
200 // Found a stringParser that handled it
201 if ( rgba.length ) {
202
203 // if this came from a parsed string, force "transparent" when alpha is 0
204 // chrome, (and maybe others) return "transparent" as rgba(0,0,0,0)
205 if ( rgba.join() === "0,0,0,0" ) {
206 jQuery.extend( rgba, colors.transparent );
207 }
208 return inst;
209 }
210
211 // named colors
212 return colors[ string ];
213 }
214
215 color.fn = jQuery.extend( color.prototype, {
216 parse: function( red, green, blue, alpha ) {
217 if ( red === undefined ) {
218 this._rgba = [ null, null, null, null ];
219 return this;
220 }
221 if ( red.jquery || red.nodeType ) {
222 red = jQuery( red ).css( green );
223 green = undefined;
224 }
225
226 var inst = this,
227 type = jQuery.type( red ),
228 rgba = this._rgba = [];
229
230 // more than 1 argument specified - assume ( red, green, blue, alpha )
231 if ( green !== undefined ) {
232 red = [ red, green, blue, alpha ];
233 type = "array";
234 }
235
236 if ( type === "string" ) {
237 return this.parse( stringParse( red ) || colors._default );
238 }
239
240 if ( type === "array" ) {
241 each( spaces.rgba.props, function( key, prop ) {
242 rgba[ prop.idx ] = clamp( red[ prop.idx ], prop );
243 });
244 return this;
245 }
246
247 if ( type === "object" ) {
248 if ( red instanceof color ) {
249 each( spaces, function( spaceName, space ) {
250 if ( red[ space.cache ] ) {
251 inst[ space.cache ] = red[ space.cache ].slice();
252 }
253 });
254 } else {
255 each( spaces, function( spaceName, space ) {
256 var cache = space.cache;
257 each( space.props, function( key, prop ) {
258
259 // if the cache doesn't exist, and we know how to convert
260 if ( !inst[ cache ] && space.to ) {
261
262 // if the value was null, we don't need to copy it
263 // if the key was alpha, we don't need to copy it either
264 if ( key === "alpha" || red[ key ] == null ) {
265 return;
266 }
267 inst[ cache ] = space.to( inst._rgba );
268 }
269
270 // this is the only case where we allow nulls for ALL properties.
271 // call clamp with alwaysAllowEmpty
272 inst[ cache ][ prop.idx ] = clamp( red[ key ], prop, true );
273 });
274
275 // everything defined but alpha?
276 if ( inst[ cache ] && jQuery.inArray( null, inst[ cache ].slice( 0, 3 ) ) < 0 ) {
277 // use the default of 1
278 inst[ cache ][ 3 ] = 1;
279 if ( space.from ) {
280 inst._rgba = space.from( inst[ cache ] );
281 }
282 }
283 });
284 }
285 return this;
286 }
287 },
288 is: function( compare ) {
289 var is = color( compare ),
290 same = true,
291 inst = this;
292
293 each( spaces, function( _, space ) {
294 var localCache,
295 isCache = is[ space.cache ];
296 if (isCache) {
297 localCache = inst[ space.cache ] || space.to && space.to( inst._rgba ) || [];
298 each( space.props, function( _, prop ) {
299 if ( isCache[ prop.idx ] != null ) {
300 same = ( isCache[ prop.idx ] === localCache[ prop.idx ] );
301 return same;
302 }
303 });
304 }
305 return same;
306 });
307 return same;
308 },
309 _space: function() {
310 var used = [],
311 inst = this;
312 each( spaces, function( spaceName, space ) {
313 if ( inst[ space.cache ] ) {
314 used.push( spaceName );
315 }
316 });
317 return used.pop();
318 },
319 transition: function( other, distance ) {
320 var end = color( other ),
321 spaceName = end._space(),
322 space = spaces[ spaceName ],
323 startColor = this.alpha() === 0 ? color( "transparent" ) : this,
324 start = startColor[ space.cache ] || space.to( startColor._rgba ),
325 result = start.slice();
326
327 end = end[ space.cache ];
328 each( space.props, function( key, prop ) {
329 var index = prop.idx,
330 startValue = start[ index ],
331 endValue = end[ index ],
332 type = propTypes[ prop.type ] || {};
333
334 // if null, don't override start value
335 if ( endValue === null ) {
336 return;
337 }
338 // if null - use end
339 if ( startValue === null ) {
340 result[ index ] = endValue;
341 } else {
342 if ( type.mod ) {
343 if ( endValue - startValue > type.mod / 2 ) {
344 startValue += type.mod;
345 } else if ( startValue - endValue > type.mod / 2 ) {
346 startValue -= type.mod;
347 }
348 }
349 result[ index ] = clamp( ( endValue - startValue ) * distance + startValue, prop );
350 }
351 });
352 return this[ spaceName ]( result );
353 },
354 blend: function( opaque ) {
355 // if we are already opaque - return ourself
356 if ( this._rgba[ 3 ] === 1 ) {
357 return this;
358 }
359
360 var rgb = this._rgba.slice(),
361 a = rgb.pop(),
362 blend = color( opaque )._rgba;
363
364 return color( jQuery.map( rgb, function( v, i ) {
365 return ( 1 - a ) * blend[ i ] + a * v;
366 }));
367 },
368 toRgbaString: function() {
369 var prefix = "rgba(",
370 rgba = jQuery.map( this._rgba, function( v, i ) {
371 return v == null ? ( i > 2 ? 1 : 0 ) : v;
372 });
373
374 if ( rgba[ 3 ] === 1 ) {
375 rgba.pop();
376 prefix = "rgb(";
377 }
378
379 return prefix + rgba.join() + ")";
380 },
381 toHslaString: function() {
382 var prefix = "hsla(",
383 hsla = jQuery.map( this.hsla(), function( v, i ) {
384 if ( v == null ) {
385 v = i > 2 ? 1 : 0;
386 }
387
388 // catch 1 and 2
389 if ( i && i < 3 ) {
390 v = Math.round( v * 100 ) + "%";
391 }
392 return v;
393 });
394
395 if ( hsla[ 3 ] === 1 ) {
396 hsla.pop();
397 prefix = "hsl(";
398 }
399 return prefix + hsla.join() + ")";
400 },
401 toHexString: function( includeAlpha ) {
402 var rgba = this._rgba.slice(),
403 alpha = rgba.pop();
404
405 if ( includeAlpha ) {
406 rgba.push( ~~( alpha * 255 ) );
407 }
408
409 return "#" + jQuery.map( rgba, function( v ) {
410
411 // default to 0 when nulls exist
412 v = ( v || 0 ).toString( 16 );
413 return v.length === 1 ? "0" + v : v;
414 }).join("");
415 },
416 toString: function() {
417 return this._rgba[ 3 ] === 0 ? "transparent" : this.toRgbaString();
418 }
419 });
420 color.fn.parse.prototype = color.fn;
421
422 // hsla conversions adapted from:
423 // https://code.google.com/p/maashaack/source/browse/packages/graphics/trunk/src/graphics/colors/HUE2RGB.as?r=5021
424
425 function hue2rgb( p, q, h ) {
426 h = ( h + 1 ) % 1;
427 if ( h * 6 < 1 ) {
428 return p + (q - p) * h * 6;
429 }
430 if ( h * 2 < 1) {
431 return q;
432 }
433 if ( h * 3 < 2 ) {
434 return p + (q - p) * ((2/3) - h) * 6;
435 }
436 return p;
437 }
438
439 spaces.hsla.to = function ( rgba ) {
440 if ( rgba[ 0 ] == null || rgba[ 1 ] == null || rgba[ 2 ] == null ) {
441 return [ null, null, null, rgba[ 3 ] ];
442 }
443 var r = rgba[ 0 ] / 255,
444 g = rgba[ 1 ] / 255,
445 b = rgba[ 2 ] / 255,
446 a = rgba[ 3 ],
447 max = Math.max( r, g, b ),
448 min = Math.min( r, g, b ),
449 diff = max - min,
450 add = max + min,
451 l = add * 0.5,
452 h, s;
453
454 if ( min === max ) {
455 h = 0;
456 } else if ( r === max ) {
457 h = ( 60 * ( g - b ) / diff ) + 360;
458 } else if ( g === max ) {
459 h = ( 60 * ( b - r ) / diff ) + 120;
460 } else {
461 h = ( 60 * ( r - g ) / diff ) + 240;
462 }
463
464 // chroma (diff) == 0 means greyscale which, by definition, saturation = 0%
465 // otherwise, saturation is based on the ratio of chroma (diff) to lightness (add)
466 if ( diff === 0 ) {
467 s = 0;
468 } else if ( l <= 0.5 ) {
469 s = diff / add;
470 } else {
471 s = diff / ( 2 - add );
472 }
473 return [ Math.round(h) % 360, s, l, a == null ? 1 : a ];
474 };
475
476 spaces.hsla.from = function ( hsla ) {
477 if ( hsla[ 0 ] == null || hsla[ 1 ] == null || hsla[ 2 ] == null ) {
478 return [ null, null, null, hsla[ 3 ] ];
479 }
480 var h = hsla[ 0 ] / 360,
481 s = hsla[ 1 ],
482 l = hsla[ 2 ],
483 a = hsla[ 3 ],
484 q = l <= 0.5 ? l * ( 1 + s ) : l + s - l * s,
485 p = 2 * l - q;
486
487 return [
488 Math.round( hue2rgb( p, q, h + ( 1 / 3 ) ) * 255 ),
489 Math.round( hue2rgb( p, q, h ) * 255 ),
490 Math.round( hue2rgb( p, q, h - ( 1 / 3 ) ) * 255 ),
491 a
492 ];
493 };
494
495
496 each( spaces, function( spaceName, space ) {
497 var props = space.props,
498 cache = space.cache,
499 to = space.to,
500 from = space.from;
501
502 // makes rgba() and hsla()
503 color.fn[ spaceName ] = function( value ) {
504
505 // generate a cache for this space if it doesn't exist
506 if ( to && !this[ cache ] ) {
507 this[ cache ] = to( this._rgba );
508 }
509 if ( value === undefined ) {
510 return this[ cache ].slice();
511 }
512
513 var ret,
514 type = jQuery.type( value ),
515 arr = ( type === "array" || type === "object" ) ? value : arguments,
516 local = this[ cache ].slice();
517
518 each( props, function( key, prop ) {
519 var val = arr[ type === "object" ? key : prop.idx ];
520 if ( val == null ) {
521 val = local[ prop.idx ];
522 }
523 local[ prop.idx ] = clamp( val, prop );
524 });
525
526 if ( from ) {
527 ret = color( from( local ) );
528 ret[ cache ] = local;
529 return ret;
530 } else {
531 return color( local );
532 }
533 };
534
535 // makes red() green() blue() alpha() hue() saturation() lightness()
536 each( props, function( key, prop ) {
537 // alpha is included in more than one space
538 if ( color.fn[ key ] ) {
539 return;
540 }
541 color.fn[ key ] = function( value ) {
542 var vtype = jQuery.type( value ),
543 fn = ( key === "alpha" ? ( this._hsla ? "hsla" : "rgba" ) : spaceName ),
544 local = this[ fn ](),
545 cur = local[ prop.idx ],
546 match;
547
548 if ( vtype === "undefined" ) {
549 return cur;
550 }
551
552 if ( vtype === "function" ) {
553 value = value.call( this, cur );
554 vtype = jQuery.type( value );
555 }
556 if ( value == null && prop.empty ) {
557 return this;
558 }
559 if ( vtype === "string" ) {
560 match = rplusequals.exec( value );
561 if ( match ) {
562 value = cur + parseFloat( match[ 2 ] ) * ( match[ 1 ] === "+" ? 1 : -1 );
563 }
564 }
565 local[ prop.idx ] = value;
566 return this[ fn ]( local );
567 };
568 });
569 });
570
571 // add cssHook and .fx.step function for each named hook.
572 // accept a space separated string of properties
573 color.hook = function( hook ) {
574 var hooks = hook.split( " " );
575 each( hooks, function( i, hook ) {
576 jQuery.cssHooks[ hook ] = {
577 set: function( elem, value ) {
578 var parsed, curElem,
579 backgroundColor = "";
580
581 if ( jQuery.type( value ) !== "string" || ( parsed = stringParse( value ) ) ) {
582 value = color( parsed || value );
583 if ( !support.rgba && value._rgba[ 3 ] !== 1 ) {
584 curElem = hook === "backgroundColor" ? elem.parentNode : elem;
585 while (
586 (backgroundColor === "" || backgroundColor === "transparent") &&
587 curElem && curElem.style
588 ) {
589 try {
590 backgroundColor = jQuery.css( curElem, "backgroundColor" );
591 curElem = curElem.parentNode;
592 } catch ( e ) {
593 }
594 }
595
596 value = value.blend( backgroundColor && backgroundColor !== "transparent" ?
597 backgroundColor :
598 "_default" );
599 }
600
601 value = value.toRgbaString();
602 }
603 try {
604 elem.style[ hook ] = value;
605 } catch( e ) {
606 // wrapped to prevent IE from throwing errors on "invalid" values like 'auto' or 'inherit'
607 }
608 }
609 };
610 jQuery.fx.step[ hook ] = function( fx ) {
611 if ( !fx.colorInit ) {
612 fx.start = color( fx.elem, hook );
613 fx.end = color( fx.end );
614 fx.colorInit = true;
615 }
616 jQuery.cssHooks[ hook ].set( fx.elem, fx.start.transition( fx.end, fx.pos ) );
617 };
618 });
619
620 };
621
622 color.hook( stepHooks );
623
624 jQuery.cssHooks.borderColor = {
625 expand: function( value ) {
626 var expanded = {};
627
628 each( [ "Top", "Right", "Bottom", "Left" ], function( i, part ) {
629 expanded[ "border" + part + "Color" ] = value;
630 });
631 return expanded;
632 }
633 };
634
635 // Basic color names only.
636 // Usage of any of the other color names requires adding yourself or including
637 // jquery.color.svg-names.js.
638 colors = jQuery.Color.names = {
639 // 4.1. Basic color keywords
640 aqua: "#00ffff",
641 black: "#000000",
642 blue: "#0000ff",
643 fuchsia: "#ff00ff",
644 gray: "#808080",
645 green: "#008000",
646 lime: "#00ff00",
647 maroon: "#800000",
648 navy: "#000080",
649 olive: "#808000",
650 purple: "#800080",
651 red: "#ff0000",
652 silver: "#c0c0c0",
653 teal: "#008080",
654 white: "#ffffff",
655 yellow: "#ffff00",
656
657 // 4.2.3. ‘transparent’ color keyword
658 transparent: [ null, null, null, 0 ],
659
660 _default: "#ffffff"
661 };
662
663 })( jQuery );| 联系我们 |
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