95 lines
3.1 KiB
JavaScript
95 lines
3.1 KiB
JavaScript
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import env from './env.js';
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import { buildTransformer } from './fourPointsTransform.js';
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var EVENT_SAVED_PROP = '___zrEVENTSAVED';
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var _calcOut = [];
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export function transformLocalCoord(out, elFrom, elTarget, inX, inY) {
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return transformCoordWithViewport(_calcOut, elFrom, inX, inY, true)
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&& transformCoordWithViewport(out, elTarget, _calcOut[0], _calcOut[1]);
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}
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export function transformCoordWithViewport(out, el, inX, inY, inverse) {
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if (el.getBoundingClientRect && env.domSupported && !isCanvasEl(el)) {
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var saved = el[EVENT_SAVED_PROP] || (el[EVENT_SAVED_PROP] = {});
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var markers = prepareCoordMarkers(el, saved);
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var transformer = preparePointerTransformer(markers, saved, inverse);
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if (transformer) {
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transformer(out, inX, inY);
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return true;
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}
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}
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return false;
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}
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function prepareCoordMarkers(el, saved) {
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var markers = saved.markers;
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if (markers) {
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return markers;
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}
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markers = saved.markers = [];
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var propLR = ['left', 'right'];
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var propTB = ['top', 'bottom'];
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for (var i = 0; i < 4; i++) {
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var marker = document.createElement('div');
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var stl = marker.style;
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var idxLR = i % 2;
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var idxTB = (i >> 1) % 2;
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stl.cssText = [
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'position: absolute',
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'visibility: hidden',
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'padding: 0',
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'margin: 0',
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'border-width: 0',
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'user-select: none',
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'width:0',
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'height:0',
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propLR[idxLR] + ':0',
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propTB[idxTB] + ':0',
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propLR[1 - idxLR] + ':auto',
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propTB[1 - idxTB] + ':auto',
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''
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].join('!important;');
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el.appendChild(marker);
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markers.push(marker);
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}
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return markers;
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}
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function preparePointerTransformer(markers, saved, inverse) {
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var transformerName = inverse ? 'invTrans' : 'trans';
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var transformer = saved[transformerName];
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var oldSrcCoords = saved.srcCoords;
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var srcCoords = [];
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var destCoords = [];
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var oldCoordTheSame = true;
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for (var i = 0; i < 4; i++) {
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var rect = markers[i].getBoundingClientRect();
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var ii = 2 * i;
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var x = rect.left;
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var y = rect.top;
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srcCoords.push(x, y);
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oldCoordTheSame = oldCoordTheSame && oldSrcCoords && x === oldSrcCoords[ii] && y === oldSrcCoords[ii + 1];
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destCoords.push(markers[i].offsetLeft, markers[i].offsetTop);
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}
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return (oldCoordTheSame && transformer)
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? transformer
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: (saved.srcCoords = srcCoords,
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saved[transformerName] = inverse
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? buildTransformer(destCoords, srcCoords)
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: buildTransformer(srcCoords, destCoords));
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}
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export function isCanvasEl(el) {
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return el.nodeName.toUpperCase() === 'CANVAS';
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}
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var replaceReg = /([&<>"'])/g;
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var replaceMap = {
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'&': '&',
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'<': '<',
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'>': '>',
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'"': '"',
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'\'': '''
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};
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export function encodeHTML(source) {
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return source == null
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? ''
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: (source + '').replace(replaceReg, function (str, c) {
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return replaceMap[c];
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});
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}
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