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 );
实例调用代码：
