User:Dialectric/vector.js

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//------------------------------------------------------
// recolor test
// task: to override inline styles for some table elements to better fit dark theme
// status: testing only - do not use
//------------------------------------------------------
/*

function fixLightColorBackground(anElement) {
    var c = anElement.style.backgroundColor ;
    var c = c.substring(1);      // strip #
    var rgb = parseInt(c, 16);   // convert rrggbb to decimal
    var r = (rgb >> 16) & 0xff;  // extract red
    var g = (rgb >>  8) & 0xff;  // extract green
    var b = (rgb >>  0) & 0xff;  // extract blue

    var luma = 0.2126 * r + 0.7152 * g + 0.0722 * b; // per ITU-R BT.709

    if (luma < 40) {
        // pick a different colour
        anElement.style.backgroundColor = '#272822';
        anElement.style.color = '#F8F8F2';
    }

    if (luma > 44) {
        // pick a different colour
        anElement.style.border = '#4px solid #FFF';
    }
};


function ready(callback){
    // in case the document is already rendered
    if (document.readyState!='loading') callback();
    // modern browsers
    else if (document.addEventListener) document.addEventListener('DOMContentLoaded', callback);
    // IE <= 8
    else document.attachEvent('onreadystatechange', function(){
        if (document.readyState=='complete') callback();
    });
}

ready(function(){
    // do something

        var target = document.querySelectorAll('table');
        Array.prototype.forEach.call(target, function(element){
        fixLightColorBackground(element); 
        });
        var target = document.querySelectorAll('th');
        Array.prototype.forEach.call(target, function(element){
        fixLightColorBackground(element); 
        });
        var target = document.querySelectorAll('h2');
        Array.prototype.forEach.call(target, function(element){
        fixLightColorBackground(element); 
        });
        var target = document.querySelectorAll('tr');
        Array.prototype.forEach.call(target, function(element){
         //element.removeAttribute('style');
         //element.style.border = '2px solid #F00';
        });
    });

*/