player/js/utils/common.js

var subframeEnabled = false;
var supportsPath2D = typeof Path2D === 'function';
//supportsPath2D = false;
var cachedColors = {};
var colorMap = [];
var body;

function styleDiv(element){
    element.style.position = 'absolute';
    element.style.top = 0;
    element.style.left = 0;
    element.style.display = 'block';
    element.style.verticalAlign = 'top';
    element.style.backfaceVisibility  = element.style.webkitBackfaceVisibility = 'hidden';
    //element.style.transformStyle = element.style.webkitTransformStyle = "preserve-3d";
    styleUnselectableDiv(element);
}

function styleUnselectableDiv(element){
    element.style.userSelect = 'none';
    element.style.MozUserSelect = 'none';
    element.style.webkitUserSelect = 'none';
    element.style.oUserSelect = 'none';

}

function randomString(length, chars){
    if(chars === undefined){
        chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
    }
    var i;
    var result = '';
    for (i = length; i > 0; --i) result += chars[Math.round(Math.random() * (chars.length - 1))];
    return result;
}

function componentToHex(c) {
    var hex = c.toString(16);
    return hex.length == 1 ? '0' + hex : hex;
}

function rgbToHex(r, g, b) {
    if(r<0){
        r = 0;
    }
    if(g<0){
        g = 0;
    }
    if(b<0){
        b = 0;
    }
    return '#' + colorMap[r] + colorMap[g] + colorMap[b];
}

function fillToRgba(hex,alpha){
    if(!cachedColors[hex]){
        var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
        cachedColors[hex] = parseInt(result[1], 16)+','+parseInt(result[2], 16)+','+parseInt(result[3], 16);
    }
    return 'rgba('+cachedColors[hex]+','+alpha+')';
}

var fillColorToString = (function(){
    var colorMap = [];
    return function(colorArr,alpha){
        if(!colorMap[colorArr[0]]){
            colorMap[colorArr[0]] = [];
        }
        if(!colorMap[colorArr[0]][colorArr[1]]){
            colorMap[colorArr[0]][colorArr[1]] = [];
        }
        if(!colorMap[colorArr[0]][colorArr[1]][colorArr[2]]){
            if(alpha != undefined){
                colorArr[3] = alpha;
            }
            colorMap[colorArr[0]][colorArr[1]][colorArr[2]] = 'rgba('+colorArr.join(',')+')';
        }
        return colorMap[colorArr[0]][colorArr[1]][colorArr[2]];
    }
}());

function createColorMap(){
    var i;
    var hex;
    for(i=0;i<256;i+=1){
        hex = i.toString(16);
        colorMap[i] = hex.length == 1 ? '0' + hex : hex;
    }
}
createColorMap();