--- /dev/null
+/*!
+ * jQuery Color Utilities
+ *
+ * Released under the MIT and GPL licenses.
+ *
+ * Mostly based on other plugins and functions (linted and optimized a little).
+ * Sources cited inline.
+ */
+( function ( $ ) {
+ /**
+ * @class jQuery.colorUtil
+ * @singleton
+ */
+ $.colorUtil = {
+
+ /**
+ * Parse CSS color strings looking for color tuples
+ *
+ * Based on highlightFade by Blair Mitchelmore
+ * <http://jquery.offput.ca/highlightFade/>
+ *
+ * @param {Array|string} color
+ * @return {Array}
+ */
+ getRGB: function ( color ) {
+ var result;
+
+ // Check if we're already dealing with an array of colors
+ if ( color && Array.isArray( color ) && color.length === 3 ) {
+ return color;
+ }
+
+ // Look for rgb(num,num,num)
+ // eslint-disable-next-line no-cond-assign
+ if ( result = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec( color ) ) {
+ return [
+ parseInt( result[ 1 ], 10 ),
+ parseInt( result[ 2 ], 10 ),
+ parseInt( result[ 3 ], 10 )
+ ];
+ }
+
+ // Look for rgb(num%,num%,num%)
+ // eslint-disable-next-line no-cond-assign
+ if ( result = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)%\s*,\s*([0-9]+(?:\.[0-9]+)?)%\s*,\s*([0-9]+(?:\.[0-9]+)?)%\s*\)/.exec( color ) ) {
+ return [
+ parseFloat( result[ 1 ] ) * 2.55,
+ parseFloat( result[ 2 ] ) * 2.55,
+ parseFloat( result[ 3 ] ) * 2.55
+ ];
+ }
+
+ // Look for #a0b1c2
+ // eslint-disable-next-line no-cond-assign
+ if ( result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec( color ) ) {
+ return [
+ parseInt( result[ 1 ], 16 ),
+ parseInt( result[ 2 ], 16 ),
+ parseInt( result[ 3 ], 16 )
+ ];
+ }
+
+ // Look for #fff
+ // eslint-disable-next-line no-cond-assign
+ if ( result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec( color ) ) {
+ return [
+ parseInt( result[ 1 ] + result[ 1 ], 16 ),
+ parseInt( result[ 2 ] + result[ 2 ], 16 ),
+ parseInt( result[ 3 ] + result[ 3 ], 16 )
+ ];
+ }
+
+ // Look for rgba(0, 0, 0, 0) == transparent in Safari 3
+ // eslint-disable-next-line no-cond-assign
+ if ( result = /rgba\(0, 0, 0, 0\)/.exec( color ) ) {
+ return $.colorUtil.colors.transparent;
+ }
+
+ // Otherwise, we're most likely dealing with a named color
+ return $.colorUtil.colors[ $.trim( color ).toLowerCase() ];
+ },
+
+ /**
+ * Named color map
+ *
+ * Based on Interface by Stefan Petre
+ * <http://interface.eyecon.ro/>
+ *
+ * @property {Object}
+ */
+ colors: {
+ aqua: [ 0, 255, 255 ],
+ azure: [ 240, 255, 255 ],
+ beige: [ 245, 245, 220 ],
+ black: [ 0, 0, 0 ],
+ blue: [ 0, 0, 255 ],
+ brown: [ 165, 42, 42 ],
+ cyan: [ 0, 255, 255 ],
+ darkblue: [ 0, 0, 139 ],
+ darkcyan: [ 0, 139, 139 ],
+ darkgrey: [ 169, 169, 169 ],
+ darkgreen: [ 0, 100, 0 ],
+ darkkhaki: [ 189, 183, 107 ],
+ darkmagenta: [ 139, 0, 139 ],
+ darkolivegreen: [ 85, 107, 47 ],
+ darkorange: [ 255, 140, 0 ],
+ darkorchid: [ 153, 50, 204 ],
+ darkred: [ 139, 0, 0 ],
+ darksalmon: [ 233, 150, 122 ],
+ darkviolet: [ 148, 0, 211 ],
+ fuchsia: [ 255, 0, 255 ],
+ gold: [ 255, 215, 0 ],
+ green: [ 0, 128, 0 ],
+ indigo: [ 75, 0, 130 ],
+ khaki: [ 240, 230, 140 ],
+ lightblue: [ 173, 216, 230 ],
+ lightcyan: [ 224, 255, 255 ],
+ lightgreen: [ 144, 238, 144 ],
+ lightgrey: [ 211, 211, 211 ],
+ lightpink: [ 255, 182, 193 ],
+ lightyellow: [ 255, 255, 224 ],
+ lime: [ 0, 255, 0 ],
+ magenta: [ 255, 0, 255 ],
+ maroon: [ 128, 0, 0 ],
+ navy: [ 0, 0, 128 ],
+ olive: [ 128, 128, 0 ],
+ orange: [ 255, 165, 0 ],
+ pink: [ 255, 192, 203 ],
+ purple: [ 128, 0, 128 ],
+ violet: [ 128, 0, 128 ],
+ red: [ 255, 0, 0 ],
+ silver: [ 192, 192, 192 ],
+ white: [ 255, 255, 255 ],
+ yellow: [ 255, 255, 0 ],
+ transparent: [ 255, 255, 255 ]
+ },
+
+ /**
+ * Convert an RGB color value to HSL.
+ *
+ * Conversion formula based on
+ * <http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript>
+ *
+ * Adapted from <https://en.wikipedia.org/wiki/HSL_color_space>.
+ *
+ * Assumes `r`, `g`, and `b` are contained in the set `[0, 255]` and
+ * returns `h`, `s`, and `l` in the set `[0, 1]`.
+ *
+ * @param {number} r The red color value
+ * @param {number} g The green color value
+ * @param {number} b The blue color value
+ * @return {number[]} The HSL representation
+ */
+ rgbToHsl: function ( r, g, b ) {
+ var d, h, s, l, min, max;
+
+ r = r / 255;
+ g = g / 255;
+ b = b / 255;
+
+ max = Math.max( r, g, b );
+ min = Math.min( r, g, b );
+ l = ( max + min ) / 2;
+
+ if ( max === min ) {
+ // achromatic
+ h = s = 0;
+ } else {
+ d = max - min;
+ s = l > 0.5 ? d / ( 2 - max - min ) : d / ( max + min );
+ switch ( max ) {
+ case r:
+ h = ( g - b ) / d + ( g < b ? 6 : 0 );
+ break;
+ case g:
+ h = ( b - r ) / d + 2;
+ break;
+ case b:
+ h = ( r - g ) / d + 4;
+ break;
+ }
+ h /= 6;
+ }
+
+ return [ h, s, l ];
+ },
+
+ /**
+ * Convert an HSL color value to RGB.
+ *
+ * Conversion formula based on
+ * <http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript>
+ *
+ * Adapted from <https://en.wikipedia.org/wiki/HSL_color_space>.
+ *
+ * Assumes `h`, `s`, and `l` are contained in the set `[0, 1]` and
+ * returns `r`, `g`, and `b` in the set `[0, 255]`.
+ *
+ * @param {number} h The hue
+ * @param {number} s The saturation
+ * @param {number} l The lightness
+ * @return {number[]} The RGB representation
+ */
+ hslToRgb: function ( h, s, l ) {
+ var r, g, b, hue2rgb, q, p;
+
+ if ( s === 0 ) {
+ r = g = b = l; // achromatic
+ } else {
+ hue2rgb = function ( p, q, t ) {
+ if ( t < 0 ) {
+ t += 1;
+ }
+ if ( t > 1 ) {
+ t -= 1;
+ }
+ if ( t < 1 / 6 ) {
+ return p + ( q - p ) * 6 * t;
+ }
+ if ( t < 1 / 2 ) {
+ return q;
+ }
+ if ( t < 2 / 3 ) {
+ return p + ( q - p ) * ( 2 / 3 - t ) * 6;
+ }
+ return p;
+ };
+
+ q = l < 0.5 ? l * ( 1 + s ) : l + s - l * s;
+ p = 2 * l - q;
+ r = hue2rgb( p, q, h + 1 / 3 );
+ g = hue2rgb( p, q, h );
+ b = hue2rgb( p, q, h - 1 / 3 );
+ }
+
+ return [ r * 255, g * 255, b * 255 ];
+ },
+
+ /**
+ * Get a brighter or darker rgb() value string.
+ *
+ * Usage:
+ *
+ * $.colorUtil.getColorBrightness( 'red', +0.1 );
+ * // > "rgb(255,50,50)"
+ * $.colorUtil.getColorBrightness( 'rgb(200,50,50)', -0.2 );
+ * // > "rgb(118,29,29)"
+ *
+ * @param {Mixed} currentColor Current value in css
+ * @param {number} mod Wanted brightness modification between -1 and 1
+ * @return {string} Like `'rgb(r,g,b)'`
+ */
+ getColorBrightness: function ( currentColor, mod ) {
+ var rgbArr = $.colorUtil.getRGB( currentColor ),
+ hslArr = $.colorUtil.rgbToHsl( rgbArr[ 0 ], rgbArr[ 1 ], rgbArr[ 2 ] );
+ rgbArr = $.colorUtil.hslToRgb( hslArr[ 0 ], hslArr[ 1 ], hslArr[ 2 ] + mod );
+
+ return 'rgb(' +
+ [ parseInt( rgbArr[ 0 ], 10 ), parseInt( rgbArr[ 1 ], 10 ), parseInt( rgbArr[ 2 ], 10 ) ].join( ',' ) +
+ ')';
+ }
+
+ };
+
+}( jQuery ) );
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff