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August 12, 2019 14:13
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| class ClipPath { | |
| /** | |
| * Checks if css property clip-path supports 'polygon()' attribute | |
| * @return {Boolean} Return TRUE if browser has support | |
| */ | |
| hasSupportToPolygon = (function () { | |
| var testEl = document.createElement('div'); | |
| var propValue = 'polygon(0 0, 0 0, 0 0, 0 0)'; | |
| testEl.style.clipPath = propValue; | |
| return testEl.style.clipPath === propValue; | |
| })(); | |
| /** | |
| * Generate an unique identifier | |
| * @return {String} | |
| */ | |
| getUniqueID = () => { | |
| return 'clip-path-' + Math.random().toString(36).substring(7); | |
| } | |
| /** | |
| * Use SVG polygon | |
| */ | |
| SVGPolyfill = (element, pathPoints, edge) => { | |
| var units = 'px'; | |
| var svgUnits = 'userSpaceOnUse'; | |
| if(pathPoints.indexOf('%') !== -1){ | |
| units = '%'; | |
| svgUnits = 'objectBoundingBox'; | |
| } | |
| pathPoints = pathPoints.replace(/px|em|%/g, ''); | |
| // Remove units from path | |
| if(units !== 'px'){ | |
| var finishedPathPoints = ''; | |
| var arrayPathPoints = pathPoints.split(', '); | |
| for (var i = 0; i < arrayPathPoints.length; i++) | |
| { | |
| var item = arrayPathPoints[i]; | |
| var arrayPathPoint = item.split(' '); | |
| var lN = Number(arrayPathPoint[0]), rN = Number(arrayPathPoint[1]); | |
| if(lN !== 0){ | |
| lN = (lN/100); | |
| } | |
| if(rN !== 0){ | |
| rN = (rN/100); | |
| } | |
| finishedPathPoints += lN+' '+rN; | |
| if(i < (arrayPathPoints.length - 1)){ | |
| finishedPathPoints += ', '; | |
| } | |
| } | |
| pathPoints = finishedPathPoints; | |
| } | |
| var elClipPathId = element.getAttribute('data-clip-path-id'); | |
| if(elClipPathId) { | |
| var actualClipPath = document.getElementById(elClipPathId); | |
| actualClipPath.setAttribute('clipPathUnits', svgUnits); | |
| var actualPolygon = document.querySelector('#' + elClipPathId + ' > polygon'); | |
| actualPolygon.setAttribute('points', pathPoints); | |
| } else { | |
| var clipPathID = this.getUniqueID(); | |
| var svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg'); | |
| svg.setAttribute('width', '0'); | |
| svg.setAttribute('height', '0'); | |
| svg.setAttribute('data-clip-path-id', clipPathID); | |
| svg.setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:xlink', 'http://www.w3.org/1999/xlink'); | |
| if(edge){ | |
| if(element.getAttribute('class')){ | |
| svg.setAttribute('class', element.getAttribute('class')); | |
| } | |
| element.setAttribute('class', ''); | |
| element.style.width = "100%"; | |
| element.style.height = "100%"; | |
| svg.style.width = "100%"; | |
| svg.style.height = "100%"; | |
| var defs = document.createElementNS('http://www.w3.org/2000/svg', 'defs'); | |
| var clipPath = document.createElementNS('http://www.w3.org/2000/svg', 'clipPath'); | |
| clipPath.setAttribute('id', clipPathID); | |
| clipPath.setAttribute('clipPathUnits', svgUnits); | |
| var polygon = document.createElementNS('http://www.w3.org/2000/svg', 'polygon'); | |
| polygon.setAttribute('points', pathPoints); | |
| var foreignObject = document.createElementNS('http://www.w3.org/2000/svg', 'foreignObject'); | |
| foreignObject.setAttribute('clip-path', 'url(#'+clipPathID+')'); | |
| foreignObject.setAttribute('width', '100%'); | |
| foreignObject.setAttribute('height', '100%'); | |
| foreignObject.appendChild(element.cloneNode(true)); | |
| svg.appendChild(foreignObject); | |
| clipPath.appendChild(polygon); | |
| defs.appendChild(clipPath); | |
| svg.appendChild(defs); | |
| element.parentNode.replaceChild(svg, element); | |
| }else{ | |
| var clipPath = document.createElementNS('http://www.w3.org/2000/svg', 'clipPath'); | |
| clipPath.setAttribute('id', clipPathID); | |
| clipPath.setAttribute('clipPathUnits', svgUnits); | |
| var polygon = document.createElementNS('http://www.w3.org/2000/svg', 'polygon'); | |
| polygon.setAttribute('points', pathPoints); | |
| clipPath.appendChild(polygon); | |
| svg.appendChild(clipPath); | |
| document.body.appendChild(svg); | |
| element.setAttribute('data-clip-path-id', clipPathID); | |
| setTimeout(function () { | |
| element.style.clipPath = 'url(#' + clipPathID + ')'; | |
| }, 0); | |
| } | |
| } | |
| } | |
| /** | |
| * Apply clip path | |
| */ | |
| applyClipPath = (element, pathPoints, _supportPolygon) => { | |
| _supportPolygon = typeof _supportPolygon !== 'undefined' ? _supportPolygon : this.hasSupportToPolygon; | |
| // Chrome / Safari | |
| if(typeof(element.style.webkitClipPath) !== 'undefined'){ | |
| element.style.webkitClipPath = 'polygon(' + pathPoints + ')'; | |
| // Unprefixed support | |
| } else if(_supportPolygon){ | |
| element.style.clipPath = 'polygon(' + pathPoints + ')'; | |
| // SVG | |
| } else { | |
| //Edge | |
| if(window.navigator.userAgent.indexOf("Edge") > -1){ | |
| this.SVGPolyfill(element, pathPoints, true); | |
| //Other | |
| }else{ | |
| this.SVGPolyfill(element, pathPoints); | |
| } | |
| } | |
| } | |
| /** | |
| * Main function | |
| */ | |
| make = (selector, pathPoints, supportPolygon) => { | |
| if(!selector) { | |
| console.error('Missing selector'); | |
| return false; | |
| } | |
| var nodeList = document.querySelectorAll(selector || ''); | |
| nodeList.forEach((element) => { | |
| var elementPathPoints = element.getAttribute('data-clip') || pathPoints; | |
| if(elementPathPoints) { | |
| this.applyClipPath(element, elementPathPoints, supportPolygon); | |
| } else { | |
| console.error('Missing clip-path parameters. Please check ClipPath() arguments or data-clip attribute.', element); | |
| } | |
| }); | |
| } | |
| } | |
| export { ClipPath }; |
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