43 lines
1.4 KiB
JavaScript
43 lines
1.4 KiB
JavaScript
const { platform } = require('../utils');
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const assets = require('../../common/assets');
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const loaderWidth = 5;
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const loaderColor = '#0090ed';
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function drawCircle(canvas, context, color, lineWidth, outerWidth, percent) {
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canvas.width = canvas.height = outerWidth;
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context.translate(outerWidth * 0.5, outerWidth * 0.5);
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context.rotate(-Math.PI * 0.5);
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const radius = (outerWidth - lineWidth) * 0.5;
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context.beginPath();
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context.arc(0, 0, radius, 0, Math.PI * 2 * percent, false);
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context.strokeStyle = color;
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context.lineCap = 'square';
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context.lineWidth = lineWidth;
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context.stroke();
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}
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function drawNewFavicon(progressRatio) {
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const canvas = document.createElement('canvas');
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const size = 32;
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const context = canvas.getContext('2d');
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drawCircle(canvas, context, '#efefef', loaderWidth, size, 1);
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drawCircle(canvas, context, loaderColor, loaderWidth, size, progressRatio);
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return canvas.toDataURL();
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}
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module.exports.updateFavicon = function(progressRatio) {
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if (platform() === 'web') {
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const link = document.querySelector("link[rel*='icon']");
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const progress = progressRatio * 100;
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if (progress === 0 || progress === 100) {
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link.type = 'image/png';
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link.href = assets.get('favicon-32x32.png');
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document.getElementsByTagName('head')[0].appendChild(link);
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return;
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}
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link.href = drawNewFavicon(progressRatio);
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document.getElementsByTagName('head')[0].appendChild(link);
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}
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};
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