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Viewing file:     colors.js (1.02 KB)      -rw-r--r--

NETDATA.colorHex2Rgb = function (hex) {
    // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
    let shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
    hex = hex.replace(shorthandRegex, function (m, r, g, b) {
        return r + r + g + g + b + b;
    });

    let result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
    return result ? {
        r: parseInt(result[1], 16),
        g: parseInt(result[2], 16),
        b: parseInt(result[3], 16)
    } : null;
};

NETDATA.colorLuminance = function (hex, lum) {
    // validate hex string
    hex = String(hex).replace(/[^0-9a-f]/gi, '');
    if (hex.length < 6) {
        hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
    }

    lum = lum || 0;

    // convert to decimal and change luminosity
    let rgb = "#";
    for (let i = 0; i < 3; i++) {
        let c = parseInt(hex.substr(i * 2, 2), 16);
        c = Math.round(Math.min(Math.max(0, c + (c * lum)), 255)).toString(16);
        rgb += ("00" + c).substr(c.length);
    }

    return rgb;
};