57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
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import { find } from 'lodash'
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const createFaviconService = () => {
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let favimg, favcanvas, favcontext, favicon
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const faviconWidth = 48
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const faviconHeight = 48
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const strokeColor = 'rgb(200, 0, 0)'
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const fillColor = 'rgb(255, 90, 90)'
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const badgeRadius = 12
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const initFaviconService = () => {
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const nodes = document.getElementsByTagName('link')
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favicon = find(nodes, node => node.rel === 'icon')
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if (favicon) {
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favcanvas = document.createElement('canvas')
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favcanvas.width = faviconWidth
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favcanvas.height = faviconHeight
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favimg = new Image()
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favimg.src = favicon.href
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favcontext = favcanvas.getContext('2d')
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}
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}
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const clearFaviconBadge = () => {
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if (!favimg || !favcontext || !favicon) return
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favcontext.clearRect(0, 0, faviconWidth, faviconHeight)
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favcontext.drawImage(favimg, 0, 0, favimg.width, favimg.height, 0, 0, faviconWidth, faviconHeight)
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favicon.href = favcanvas.toDataURL('image/png')
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}
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const drawFaviconBadge = () => {
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if (!favimg || !favcontext || !favcontext) return
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clearFaviconBadge()
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favcontext.drawImage(favimg, 0, 0, favimg.width, favimg.height, 0, 0, faviconWidth, faviconHeight)
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favcontext.fillStyle = fillColor
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favcontext.strokeStyle = strokeColor
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favcontext.beginPath()
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favcontext.arc(faviconWidth - badgeRadius, faviconHeight - badgeRadius, badgeRadius, 0, 2 * Math.PI, false)
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favcontext.fill()
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favcontext.stroke()
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favicon.href = favcanvas.toDataURL('image/png')
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}
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return {
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initFaviconService,
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clearFaviconBadge,
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drawFaviconBadge
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}
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}
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const FaviconService = createFaviconService()
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export default FaviconService
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