jQuery插件——可以动态改动颜色的jQueryColor
1、请选择代码框中所有代码后, 保存为 jquery.color.js
- /*!
- * jQuery Color Animations v@VERSION
- * https://github.com/jquery/jquery-color
- *
- * Copyright 2012 jQuery Foundation and other contributors
- * Released under the MIT license.
- * http://jquery.org/license
- *
- * Date: @DATE
- */
- (function( jQuery, undefined ) {
- var stepHooks = "backgroundColor borderBottomColor borderLeftColor borderRightColor borderTopColor color columnRuleColor outlineColor textDecorationColor textEmphasisColor",
- // plusequals test for += 100 -= 100
- rplusequals = /^([\-+])=\s*(\d+\.?\d*)/,
- // a set of RE's that can match strings and generate color tuples.
- stringParsers = [{
- re: /rgba?\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*(?:,\s*(\d?(?:\.\d+)?)\s*)?\)/,
- parse: function( execResult ) {
- return [
- execResult[ 1 ],
- execResult[ 2 ],
- execResult[ 3 ],
- execResult[ 4 ]
- ];
- }
- }, {
- re: /rgba?\(\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d?(?:\.\d+)?)\s*)?\)/,
- parse: function( execResult ) {
- return [
- execResult[ 1 ] * 2.55,
- execResult[ 2 ] * 2.55,
- execResult[ 3 ] * 2.55,
- execResult[ 4 ]
- ];
- }
- }, {
- // this regex ignores A-F because it's compared against an already lowercased string
- re: /#([a-f0-9]{2})([a-f0-9]{2})([a-f0-9]{2})/,
- parse: function( execResult ) {
- return [
- parseInt( execResult[ 1 ], 16 ),
- parseInt( execResult[ 2 ], 16 ),
- parseInt( execResult[ 3 ], 16 )
- ];
- }
- }, {
- // this regex ignores A-F because it's compared against an already lowercased string
- re: /#([a-f0-9])([a-f0-9])([a-f0-9])/,
- parse: function( execResult ) {
- return [
- parseInt( execResult[ 1 ] + execResult[ 1 ], 16 ),
- parseInt( execResult[ 2 ] + execResult[ 2 ], 16 ),
- parseInt( execResult[ 3 ] + execResult[ 3 ], 16 )
- ];
- }
- }, {
- re: /hsla?\(\s*(\d+(?:\.\d+)?)\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d?(?:\.\d+)?)\s*)?\)/,
- space: "hsla",
- parse: function( execResult ) {
- return [
- execResult[ 1 ],
- execResult[ 2 ] / 100,
- execResult[ 3 ] / 100,
- execResult[ 4 ]
- ];
- }
- }],
- // jQuery.Color( )
- color = jQuery.Color = function( color, green, blue, alpha ) {
- return new jQuery.Color.fn.parse( color, green, blue, alpha );
- },
- spaces = {
- rgba: {
- props: {
- red: {
- idx: 0,
- type: "byte"
- },
- green: {
- idx: 1,
- type: "byte"
- },
- blue: {
- idx: 2,
- type: "byte"
- }
- }
- },
- hsla: {
- props: {
- hue: {
- idx: 0,
- type: "degrees"
- },
- saturation: {
- idx: 1,
- type: "percent"
- },
- lightness: {
- idx: 2,
- type: "percent"
- }
- }
- }
- },
- propTypes = {
- "byte": {
- floor: true,
- max: 255
- },
- "percent": {
- max: 1
- },
- "degrees": {
- mod: 360,
- floor: true
- }
- },
- support = color.support = {},
- // element for support tests
- supportElem = jQuery( "<p>" )[ 0 ],
- // colors = jQuery.Color.names
- colors,
- // local aliases of functions called often
- each = jQuery.each;
- // determine rgba support immediately
- supportElem.style.cssText = "background-color:rgba(1,1,1,.5)";
- support.rgba = supportElem.style.backgroundColor.indexOf( "rgba" ) > -1;
- // define cache name and alpha properties
- // for rgba and hsla spaces
- each( spaces, function( spaceName, space ) {
- space.cache = "_" + spaceName;
- space.props.alpha = {
- idx: 3,
- type: "percent",
- def: 1
- };
- });
- function clamp( value, prop, allowEmpty ) {
- var type = propTypes[ prop.type ] || {};
- if ( value == null ) {
- return (allowEmpty || !prop.def) ? null : prop.def;
- }
- // ~~ is an short way of doing floor for positive numbers
- value = type.floor ? ~~value : parseFloat( value );
- // IE will pass in empty strings as value for alpha,
- // which will hit this case
- if ( isNaN( value ) ) {
- return prop.def;
- }
- if ( type.mod ) {
- // we add mod before modding to make sure that negatives values
- // get converted properly: -10 -> 350
- return (value + type.mod) % type.mod;
- }
- // for now all property types without mod have min and max
- return 0 > value ? 0 : type.max < value ? type.max : value;
- }
- function stringParse( string ) {
- var inst = color(),
- rgba = inst._rgba = [];
- string = string.toLowerCase();
- each( stringParsers, function( i, parser ) {
- var parsed,
- match = parser.re.exec( string ),
- values = match && parser.parse( match ),
- spaceName = parser.space || "rgba";
- if ( values ) {
- parsed = inst[ spaceName ]( values );
- // if this was an rgba parse the assignment might happen twice
- // oh well....
- inst[ spaces[ spaceName ].cache ] = parsed[ spaces[ spaceName ].cache ];
- rgba = inst._rgba = parsed._rgba;
- // exit each( stringParsers ) here because we matched
- return false;
- }
- });
- // Found a stringParser that handled it
- if ( rgba.length ) {
- // if this came from a parsed string, force "transparent" when alpha is 0
- // chrome, (and maybe others) return "transparent" as rgba(0,0,0,0)
- if ( rgba.join() === "0,0,0,0" ) {
- jQuery.extend( rgba, colors.transparent );
- }
- return inst;
- }
- // named colors
- return colors[ string ];
- }
- color.fn = jQuery.extend( color.prototype, {
- parse: function( red, green, blue, alpha ) {
- if ( red === undefined ) {
- this._rgba = [ null, null, null, null ];
- return this;
- }
- if ( red.jquery || red.nodeType ) {
- red = jQuery( red ).css( green );
- green = undefined;
- }
- var inst = this,
- type = jQuery.type( red ),
- rgba = this._rgba = [];
- // more than 1 argument specified - assume ( red, green, blue, alpha )
- if ( green !== undefined ) {
- red = [ red, green, blue, alpha ];
- type = "array";
- }
- if ( type === "string" ) {
- return this.parse( stringParse( red ) || colors._default );
- }
- if ( type === "array" ) {
- each( spaces.rgba.props, function( key, prop ) {
- rgba[ prop.idx ] = clamp( red[ prop.idx ], prop );
- });
- return this;
- }
- if ( type === "object" ) {
- if ( red instanceof color ) {
- each( spaces, function( spaceName, space ) {
- if ( red[ space.cache ] ) {
- inst[ space.cache ] = red[ space.cache ].slice();
- }
- });
- } else {
- each( spaces, function( spaceName, space ) {
- var cache = space.cache;
- each( space.props, function( key, prop ) {
- // if the cache doesn't exist, and we know how to convert
- if ( !inst[ cache ] && space.to ) {
- // if the value was null, we don't need to copy it
- // if the key was alpha, we don't need to copy it either
- if ( key === "alpha" || red[ key ] == null ) {
- return;
- }
- inst[ cache ] = space.to( inst._rgba );
- }
- // this is the only case where we allow nulls for ALL properties.
- // call clamp with alwaysAllowEmpty
- inst[ cache ][ prop.idx ] = clamp( red[ key ], prop, true );
- });
- // everything defined but alpha?
- if ( inst[ cache ] && jQuery.inArray( null, inst[ cache ].slice( 0, 3 ) ) < 0 ) {
- // use the default of 1
- inst[ cache ][ 3 ] = 1;
- if ( space.from ) {
- inst._rgba = space.from( inst[ cache ] );
- }
- }
- });
- }
- return this;
- }
- },
- is: function( compare ) {
- var is = color( compare ),
- same = true,
- inst = this;
- each( spaces, function( _, space ) {
- var localCache,
- isCache = is[ space.cache ];
- if (isCache) {
- localCache = inst[ space.cache ] || space.to && space.to( inst._rgba ) || [];
- each( space.props, function( _, prop ) {
- if ( isCache[ prop.idx ] != null ) {
- same = ( isCache[ prop.idx ] === localCache[ prop.idx ] );
- return same;
- }
- });
- }
- return same;
- });
- return same;
- },
- _space: function() {
- var used = [],
- inst = this;
- each( spaces, function( spaceName, space ) {
- if ( inst[ space.cache ] ) {
- used.push( spaceName );
- }
- });
- return used.pop();
- },
- transition: function( other, distance ) {
- var end = color( other ),
- spaceName = end._space(),
- space = spaces[ spaceName ],
- startColor = this.alpha() === 0 ? color( "transparent" ) : this,
- start = startColor[ space.cache ] || space.to( startColor._rgba ),
- result = start.slice();
- end = end[ space.cache ];
- each( space.props, function( key, prop ) {
- var index = prop.idx,
- startValue = start[ index ],
- endValue = end[ index ],
- type = propTypes[ prop.type ] || {};
- // if null, don't override start value
- if ( endValue === null ) {
- return;
- }
- // if null - use end
- if ( startValue === null ) {
- result[ index ] = endValue;
- } else {
- if ( type.mod ) {
- if ( endValue - startValue > type.mod / 2 ) {
- startValue += type.mod;
- } else if ( startValue - endValue > type.mod / 2 ) {
- startValue -= type.mod;
- }
- }
- result[ index ] = clamp( ( endValue - startValue ) * distance + startValue, prop );
- }
- });
- return this[ spaceName ]( result );
- },
- blend: function( opaque ) {
- // if we are already opaque - return ourself
- if ( this._rgba[ 3 ] === 1 ) {
- return this;
- }
- var rgb = this._rgba.slice(),
- a = rgb.pop(),
- blend = color( opaque )._rgba;
- return color( jQuery.map( rgb, function( v, i ) {
- return ( 1 - a ) * blend[ i ] + a * v;
- }));
- },
- toRgbaString: function() {
- var prefix = "rgba(",
- rgba = jQuery.map( this._rgba, function( v, i ) {
- return v == null ? ( i > 2 ? 1 : 0 ) : v;
- });
- if ( rgba[ 3 ] === 1 ) {
- rgba.pop();
- prefix = "rgb(";
- }
- return prefix + rgba.join() + ")";
- },
- toHslaString: function() {
- var prefix = "hsla(",
- hsla = jQuery.map( this.hsla(), function( v, i ) {
- if ( v == null ) {
- v = i > 2 ? 1 : 0;
- }
- // catch 1 and 2
- if ( i && i < 3 ) {
- v = Math.round( v * 100 ) + "%";
- }
- return v;
- });
- if ( hsla[ 3 ] === 1 ) {
- hsla.pop();
- prefix = "hsl(";
- }
- return prefix + hsla.join() + ")";
- },
- toHexString: function( includeAlpha ) {
- var rgba = this._rgba.slice(),
- alpha = rgba.pop();
- if ( includeAlpha ) {
- rgba.push( ~~( alpha * 255 ) );
- }
- return "#" + jQuery.map( rgba, function( v ) {
- // default to 0 when nulls exist
- v = ( v || 0 ).toString( 16 );
- return v.length === 1 ? "0" + v : v;
- }).join("");
- },
- toString: function() {
- return this._rgba[ 3 ] === 0 ? "transparent" : this.toRgbaString();
- }
- });
- color.fn.parse.prototype = color.fn;
- // hsla conversions adapted from:
- // https://code.google.com/p/maashaack/source/browse/packages/graphics/trunk/src/graphics/colors/HUE2RGB.as?r=5021
- function hue2rgb( p, q, h ) {
- h = ( h + 1 ) % 1;
- if ( h * 6 < 1 ) {
- return p + (q - p) * h * 6;
- }
- if ( h * 2 < 1) {
- return q;
- }
- if ( h * 3 < 2 ) {
- return p + (q - p) * ((2/3) - h) * 6;
- }
- return p;
- }
- spaces.hsla.to = function ( rgba ) {
- if ( rgba[ 0 ] == null || rgba[ 1 ] == null || rgba[ 2 ] == null ) {
- return [ null, null, null, rgba[ 3 ] ];
- }
- var r = rgba[ 0 ] / 255,
- g = rgba[ 1 ] / 255,
- b = rgba[ 2 ] / 255,
- a = rgba[ 3 ],
- max = Math.max( r, g, b ),
- min = Math.min( r, g, b ),
- diff = max - min,
- add = max + min,
- l = add * 0.5,
- h, s;
- if ( min === max ) {
- h = 0;
- } else if ( r === max ) {
- h = ( 60 * ( g - b ) / diff ) + 360;
- } else if ( g === max ) {
- h = ( 60 * ( b - r ) / diff ) + 120;
- } else {
- h = ( 60 * ( r - g ) / diff ) + 240;
- }
- // chroma (diff) == 0 means greyscale which, by definition, saturation = 0%
- // otherwise, saturation is based on the ratio of chroma (diff) to lightness (add)
- if ( diff === 0 ) {
- s = 0;
- } else if ( l <= 0.5 ) {
- s = diff / add;
- } else {
- s = diff / ( 2 - add );
- }
- return [ Math.round(h) % 360, s, l, a == null ? 1 : a ];
- };
- spaces.hsla.from = function ( hsla ) {
- if ( hsla[ 0 ] == null || hsla[ 1 ] == null || hsla[ 2 ] == null ) {
- return [ null, null, null, hsla[ 3 ] ];
- }
- var h = hsla[ 0 ] / 360,
- s = hsla[ 1 ],
- l = hsla[ 2 ],
- a = hsla[ 3 ],
- q = l <= 0.5 ? l * ( 1 + s ) : l + s - l * s,
- p = 2 * l - q;
- return [
- Math.round( hue2rgb( p, q, h + ( 1 / 3 ) ) * 255 ),
- Math.round( hue2rgb( p, q, h ) * 255 ),
- Math.round( hue2rgb( p, q, h - ( 1 / 3 ) ) * 255 ),
- a
- ];
- };
- each( spaces, function( spaceName, space ) {
- var props = space.props,
- cache = space.cache,
- to = space.to,
- from = space.from;
- // makes rgba() and hsla()
- color.fn[ spaceName ] = function( value ) {
- // generate a cache for this space if it doesn't exist
- if ( to && !this[ cache ] ) {
- this[ cache ] = to( this._rgba );
- }
- if ( value === undefined ) {
- return this[ cache ].slice();
- }
- var ret,
- type = jQuery.type( value ),
- arr = ( type === "array" || type === "object" ) ? value : arguments,
- local = this[ cache ].slice();
- each( props, function( key, prop ) {
- var val = arr[ type === "object" ? key : prop.idx ];
- if ( val == null ) {
- val = local[ prop.idx ];
- }
- local[ prop.idx ] = clamp( val, prop );
- });
- if ( from ) {
- ret = color( from( local ) );
- ret[ cache ] = local;
- return ret;
- } else {
- return color( local );
- }
- };
- // makes red() green() blue() alpha() hue() saturation() lightness()
- each( props, function( key, prop ) {
- // alpha is included in more than one space
- if ( color.fn[ key ] ) {
- return;
- }
- color.fn[ key ] = function( value ) {
- var vtype = jQuery.type( value ),
- fn = ( key === "alpha" ? ( this._hsla ? "hsla" : "rgba" ) : spaceName ),
- local = this[ fn ](),
- cur = local[ prop.idx ],
- match;
- if ( vtype === "undefined" ) {
- return cur;
- }
- if ( vtype === "function" ) {
- value = value.call( this, cur );
- vtype = jQuery.type( value );
- }
- if ( value == null && prop.empty ) {
- return this;
- }
- if ( vtype === "string" ) {
- match = rplusequals.exec( value );
- if ( match ) {
- value = cur + parseFloat( match[ 2 ] ) * ( match[ 1 ] === "+" ? 1 : -1 );
- }
- }
- local[ prop.idx ] = value;
- return this[ fn ]( local );
- };
- });
- });
- // add cssHook and .fx.step function for each named hook.
- // accept a space separated string of properties
- color.hook = function( hook ) {
- var hooks = hook.split( " " );
- each( hooks, function( i, hook ) {
- jQuery.cssHooks[ hook ] = {
- set: function( elem, value ) {
- var parsed, curElem,
- backgroundColor = "";
- if ( jQuery.type( value ) !== "string" || ( parsed = stringParse( value ) ) ) {
- value = color( parsed || value );
- if ( !support.rgba && value._rgba[ 3 ] !== 1 ) {
- curElem = hook === "backgroundColor" ? elem.parentNode : elem;
- while (
- (backgroundColor === "" || backgroundColor === "transparent") &&
- curElem && curElem.style
- ) {
- try {
- backgroundColor = jQuery.css( curElem, "backgroundColor" );
- curElem = curElem.parentNode;
- } catch ( e ) {
- }
- }
- value = value.blend( backgroundColor && backgroundColor !== "transparent" ?
- backgroundColor :
- "_default" );
- }
- value = value.toRgbaString();
- }
- try {
- elem.style[ hook ] = value;
- } catch( e ) {
- // wrapped to prevent IE from throwing errors on "invalid" values like 'auto' or 'inherit'
- }
- }
- };
- jQuery.fx.step[ hook ] = function( fx ) {
- if ( !fx.colorInit ) {
- fx.start = color( fx.elem, hook );
- fx.end = color( fx.end );
- fx.colorInit = true;
- }
- jQuery.cssHooks[ hook ].set( fx.elem, fx.start.transition( fx.end, fx.pos ) );
- };
- });
- };
- color.hook( stepHooks );
- jQuery.cssHooks.borderColor = {
- expand: function( value ) {
- var expanded = {};
- each( [ "Top", "Right", "Bottom", "Left" ], function( i, part ) {
- expanded[ "border" + part + "Color" ] = value;
- });
- return expanded;
- }
- };
- // Basic color names only.
- // Usage of any of the other color names requires adding yourself or including
- // jquery.color.svg-names.js.
- colors = jQuery.Color.names = {
- // 4.1. Basic color keywords
- aqua: "#00ffff",
- black: "#000000",
- blue: "#0000ff",
- fuchsia: "#ff00ff",
- gray: "#808080",
- green: "#008000",
- lime: "#00ff00",
- maroon: "#800000",
- navy: "#000080",
- olive: "#808000",
- purple: "#800080",
- red: "#ff0000",
- silver: "#c0c0c0",
- teal: "#008080",
- white: "#ffffff",
- yellow: "#ffff00",
- // 4.2.3. "transparent" color keyword
- transparent: [ null, null, null, 0 ],
- _default: "#ffffff"
- };
- })( jQuery );
2、调用实例:
- <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.js" type="text/javascript"></script>
- <script type="text/javascript" src="jquery.color.js"></script>
- <div id="test" style="background-color: #00ffff">Test string</div>
- <script type="text/javascript">
- var $div = $("#test").animate({"background-color": 'transparent'}, 1400);
- </script>
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