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275 lines
9.3 KiB
JavaScript
275 lines
9.3 KiB
JavaScript
import $ from 'jquery';
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import {hideElem} from '../utils/dom.js';
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function getDefaultSvgBoundsIfUndefined(svgXml, src) {
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const DefaultSize = 300;
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const MaxSize = 99999;
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const svg = svgXml.documentElement;
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const width = svg?.width?.baseVal;
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const height = svg?.height?.baseVal;
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if (width === undefined || height === undefined) {
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return null; // in case some svg is invalid or doesn't have the width/height
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}
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if (width.unitType === SVGLength.SVG_LENGTHTYPE_PERCENTAGE || height.unitType === SVGLength.SVG_LENGTHTYPE_PERCENTAGE) {
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const img = new Image();
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img.src = src;
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if (img.width > 1 && img.width < MaxSize && img.height > 1 && img.height < MaxSize) {
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return {
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width: img.width,
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height: img.height
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};
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}
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if (svg.hasAttribute('viewBox')) {
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const viewBox = svg.viewBox.baseVal;
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return {
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width: DefaultSize,
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height: DefaultSize * viewBox.width / viewBox.height
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};
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}
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return {
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width: DefaultSize,
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height: DefaultSize
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};
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}
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return null;
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}
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export function initImageDiff() {
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function createContext(image1, image2) {
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const size1 = {
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width: image1 && image1.width || 0,
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height: image1 && image1.height || 0
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};
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const size2 = {
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width: image2 && image2.width || 0,
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height: image2 && image2.height || 0
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};
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const max = {
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width: Math.max(size2.width, size1.width),
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height: Math.max(size2.height, size1.height)
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};
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return {
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image1: $(image1),
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image2: $(image2),
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size1,
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size2,
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max,
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ratio: [
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Math.floor(max.width - size1.width) / 2,
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Math.floor(max.height - size1.height) / 2,
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Math.floor(max.width - size2.width) / 2,
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Math.floor(max.height - size2.height) / 2
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]
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};
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}
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$('.image-diff:not([data-image-diff-loaded])').each(function() {
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const $container = $(this);
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$container.attr('data-image-diff-loaded', 'true');
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// the container may be hidden by "viewed" checkbox, so use the parent's width for reference
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const diffContainerWidth = Math.max($container.closest('.diff-file-box').width() - 300, 100);
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const pathAfter = $container.data('path-after');
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const pathBefore = $container.data('path-before');
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const imageInfos = [{
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loaded: false,
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path: pathAfter,
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$image: $container.find('img.image-after'),
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$boundsInfo: $container.find('.bounds-info-after')
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}, {
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loaded: false,
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path: pathBefore,
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$image: $container.find('img.image-before'),
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$boundsInfo: $container.find('.bounds-info-before')
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}];
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for (const info of imageInfos) {
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if (info.$image.length > 0) {
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$.ajax({
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url: info.path,
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success: (data, _, jqXHR) => {
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info.$image.on('load', () => {
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info.loaded = true;
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setReadyIfLoaded();
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}).on('error', () => {
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info.loaded = true;
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setReadyIfLoaded();
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info.$boundsInfo.text('(image error)');
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});
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info.$image.attr('src', info.path);
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if (jqXHR.getResponseHeader('Content-Type') === 'image/svg+xml') {
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const bounds = getDefaultSvgBoundsIfUndefined(data, info.path);
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if (bounds) {
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info.$image.attr('width', bounds.width);
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info.$image.attr('height', bounds.height);
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hideElem(info.$boundsInfo);
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}
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}
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}
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});
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} else {
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info.loaded = true;
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setReadyIfLoaded();
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}
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}
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function setReadyIfLoaded() {
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if (imageInfos[0].loaded && imageInfos[1].loaded) {
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initViews(imageInfos[0].$image, imageInfos[1].$image);
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}
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}
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function initViews($imageAfter, $imageBefore) {
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initSideBySide(createContext($imageAfter[0], $imageBefore[0]));
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if ($imageAfter.length > 0 && $imageBefore.length > 0) {
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initSwipe(createContext($imageAfter[1], $imageBefore[1]));
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initOverlay(createContext($imageAfter[2], $imageBefore[2]));
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}
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$container.find('> .gt-hidden').removeClass('gt-hidden');
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hideElem($container.find('.ui.loader'));
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}
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function initSideBySide(sizes) {
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let factor = 1;
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if (sizes.max.width > (diffContainerWidth - 24) / 2) {
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factor = (diffContainerWidth - 24) / 2 / sizes.max.width;
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}
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const widthChanged = sizes.image1.length !== 0 && sizes.image2.length !== 0 && sizes.image1[0].naturalWidth !== sizes.image2[0].naturalWidth;
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const heightChanged = sizes.image1.length !== 0 && sizes.image2.length !== 0 && sizes.image1[0].naturalHeight !== sizes.image2[0].naturalHeight;
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if (sizes.image1.length !== 0) {
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$container.find('.bounds-info-after .bounds-info-width').text(`${sizes.image1[0].naturalWidth}px`).addClass(widthChanged ? 'green' : '');
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$container.find('.bounds-info-after .bounds-info-height').text(`${sizes.image1[0].naturalHeight}px`).addClass(heightChanged ? 'green' : '');
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}
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if (sizes.image2.length !== 0) {
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$container.find('.bounds-info-before .bounds-info-width').text(`${sizes.image2[0].naturalWidth}px`).addClass(widthChanged ? 'red' : '');
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$container.find('.bounds-info-before .bounds-info-height').text(`${sizes.image2[0].naturalHeight}px`).addClass(heightChanged ? 'red' : '');
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}
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sizes.image1.css({
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width: sizes.size1.width * factor,
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height: sizes.size1.height * factor
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});
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sizes.image1.parent().css({
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margin: `10px auto`,
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width: sizes.size1.width * factor + 2,
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height: sizes.size1.height * factor + 2
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});
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sizes.image2.css({
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width: sizes.size2.width * factor,
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height: sizes.size2.height * factor
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});
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sizes.image2.parent().css({
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margin: `10px auto`,
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width: sizes.size2.width * factor + 2,
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height: sizes.size2.height * factor + 2
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});
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}
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function initSwipe(sizes) {
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let factor = 1;
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if (sizes.max.width > diffContainerWidth - 12) {
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factor = (diffContainerWidth - 12) / sizes.max.width;
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}
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sizes.image1.css({
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width: sizes.size1.width * factor,
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height: sizes.size1.height * factor
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});
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sizes.image1.parent().css({
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margin: `0px ${sizes.ratio[0] * factor}px`,
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width: sizes.size1.width * factor + 2,
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height: sizes.size1.height * factor + 2
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});
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sizes.image1.parent().parent().css({
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padding: `${sizes.ratio[1] * factor}px 0 0 0`,
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width: sizes.max.width * factor + 2
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});
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sizes.image2.css({
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width: sizes.size2.width * factor,
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height: sizes.size2.height * factor
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});
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sizes.image2.parent().css({
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margin: `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`,
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width: sizes.size2.width * factor + 2,
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height: sizes.size2.height * factor + 2
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});
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sizes.image2.parent().parent().css({
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width: sizes.max.width * factor + 2,
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height: sizes.max.height * factor + 2
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});
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$container.find('.diff-swipe').css({
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width: sizes.max.width * factor + 2,
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height: sizes.max.height * factor + 4
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});
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$container.find('.swipe-bar').on('mousedown', function(e) {
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e.preventDefault();
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const $swipeBar = $(this);
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const $swipeFrame = $swipeBar.parent();
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const width = $swipeFrame.width() - $swipeBar.width() - 2;
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$(document).on('mousemove.diff-swipe', (e2) => {
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e2.preventDefault();
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const value = Math.max(0, Math.min(e2.clientX - $swipeFrame.offset().left, width));
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$swipeBar.css({
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left: value
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});
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$container.find('.swipe-container').css({
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width: $swipeFrame.width() - value
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});
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$(document).on('mouseup.diff-swipe', () => {
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$(document).off('.diff-swipe');
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});
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});
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});
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}
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function initOverlay(sizes) {
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let factor = 1;
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if (sizes.max.width > diffContainerWidth - 12) {
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factor = (diffContainerWidth - 12) / sizes.max.width;
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}
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sizes.image1.css({
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width: sizes.size1.width * factor,
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height: sizes.size1.height * factor
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});
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sizes.image2.css({
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width: sizes.size2.width * factor,
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height: sizes.size2.height * factor
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});
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sizes.image1.parent().css({
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margin: `${sizes.ratio[1] * factor}px ${sizes.ratio[0] * factor}px`,
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width: sizes.size1.width * factor + 2,
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height: sizes.size1.height * factor + 2
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});
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sizes.image2.parent().css({
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margin: `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`,
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width: sizes.size2.width * factor + 2,
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height: sizes.size2.height * factor + 2
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});
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// some inner elements are `position: absolute`, so the container's height must be large enough
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// the "css(width, height)" is somewhat hacky and not easy to understand, it could be improved in the future
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sizes.image2.parent().parent().css({
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width: sizes.max.width * factor + 2,
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height: sizes.max.height * factor + 2 + 20 /* extra height for inner "position: absolute" elements */,
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});
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const $range = $container.find("input[type='range']");
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const onInput = () => sizes.image1.parent().css({
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opacity: $range.val() / 100
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});
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$range.on('input', onInput);
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onInput();
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}
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});
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}
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