Ext.util.Color

[demon222]

simple color invert function

use: Ext.util.Color.invertHex('ffffff') - > 000000

Ext.util.Color = function() {
    return {
                decToHex: function( n ) {
                        var HCHARS = '0123456789ABCDEF';
                        n = parseInt(n, 10);
                        n = ( !isNaN( n )) ? n : 0;
                        n = (n > 255 || n < 0) ? 0 : n;
                        return HCHARS.charAt( ( n - n % 16 ) / 16 ) + HCHARS.charAt( n % 16 );
                },
        getHCharPos: function( c ) {
            var HCHARS = '0123456789ABCDEF';
            return HCHARS.indexOf( c.toUpperCase() );
        },
        hexToDec: function( hex ) {
            var s = hex.split('');
            return ( ( Ext.util.Color.getHCharPos( s[0] ) * 16 ) + Ext.util.Color.getHCharPos( s[1] ) );
        },
                rgbToHex: function( r, g, b ) {
                        if( r instanceof Array ) { return Ext.util.Color.rgbToHex.call( this, r[0], r[1], r[2] ); }
                        return Ext.util.Color.decToHex( r ) + Ext.util.Color.decToHex( g ) + Ext.util.Color.decToHex( b );
                },               
        hexToRgb: function( hex ) {
            return [ Ext.util.Color.hexToDec( hex.substr(0, 2) ), Ext.util.Color.hexToDec( hex.substr(2, 2) ), Ext.util.Color.hexToDec( hex.substr(4, 2) ) ];
        },
        invertRgb: function( r, g, b ) {
            if( r instanceof Array ) { return Ext.util.Color.invertRgb.call( this, r[0], r[1], r[2] ); }
            return [255-r,255-g,255-b];
        },
                invertHex: function( hex ) {
                    var rgb = Ext.util.Color.hexToRgb(hex),
                    invert =  Ext.util.Color.invertRgb(rgb[0], rgb[1], rgb[2]);
                    return Ext.util.Color.rgbToHex(invert[0], invert[1], invert[2]);
                }
    }
}(); 

[mitchellsimoens]

Nice!