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- import $ from 'jquery';
- import {GET} from '../modules/fetch.js';
- import {hideElem, loadElem, queryElemChildren} from '../utils/dom.js';
- import {parseDom} from '../utils.js';
-
- function getDefaultSvgBoundsIfUndefined(text, src) {
- const DefaultSize = 300;
- const MaxSize = 99999;
-
- const svgDoc = parseDom(text, 'image/svg+xml');
- const svg = svgDoc.documentElement;
- const width = svg?.width?.baseVal;
- const height = svg?.height?.baseVal;
- if (width === undefined || height === undefined) {
- return null; // in case some svg is invalid or doesn't have the width/height
- }
- if (width.unitType === SVGLength.SVG_LENGTHTYPE_PERCENTAGE || height.unitType === SVGLength.SVG_LENGTHTYPE_PERCENTAGE) {
- const img = new Image();
- img.src = src;
- if (img.width > 1 && img.width < MaxSize && img.height > 1 && img.height < MaxSize) {
- return {
- width: img.width,
- height: img.height,
- };
- }
- if (svg.hasAttribute('viewBox')) {
- const viewBox = svg.viewBox.baseVal;
- return {
- width: DefaultSize,
- height: DefaultSize * viewBox.width / viewBox.height,
- };
- }
- return {
- width: DefaultSize,
- height: DefaultSize,
- };
- }
- return null;
- }
-
- function createContext(imageAfter, imageBefore) {
- const sizeAfter = {
- width: imageAfter?.width || 0,
- height: imageAfter?.height || 0,
- };
- const sizeBefore = {
- width: imageBefore?.width || 0,
- height: imageBefore?.height || 0,
- };
- const maxSize = {
- width: Math.max(sizeBefore.width, sizeAfter.width),
- height: Math.max(sizeBefore.height, sizeAfter.height),
- };
-
- return {
- imageAfter,
- imageBefore,
- sizeAfter,
- sizeBefore,
- maxSize,
- ratio: [
- Math.floor(maxSize.width - sizeAfter.width) / 2,
- Math.floor(maxSize.height - sizeAfter.height) / 2,
- Math.floor(maxSize.width - sizeBefore.width) / 2,
- Math.floor(maxSize.height - sizeBefore.height) / 2,
- ],
- };
- }
-
- export function initImageDiff() {
- $('.image-diff:not([data-image-diff-loaded])').each(async function() {
- const $container = $(this);
- this.setAttribute('data-image-diff-loaded', 'true');
-
- // the container may be hidden by "viewed" checkbox, so use the parent's width for reference
- const diffContainerWidth = Math.max($container.closest('.diff-file-box').width() - 300, 100);
-
- const imageInfos = [{
- path: this.getAttribute('data-path-after'),
- mime: this.getAttribute('data-mime-after'),
- $images: $container.find('img.image-after'), // matches 3 <img>
- $boundsInfo: $container.find('.bounds-info-after'),
- }, {
- path: this.getAttribute('data-path-before'),
- mime: this.getAttribute('data-mime-before'),
- $images: $container.find('img.image-before'), // matches 3 <img>
- $boundsInfo: $container.find('.bounds-info-before'),
- }];
-
- await Promise.all(imageInfos.map(async (info) => {
- const [success] = await Promise.all(Array.from(info.$images, (img) => {
- return loadElem(img, info.path);
- }));
- // only the first images is associated with $boundsInfo
- if (!success) info.$boundsInfo.text('(image error)');
- if (info.mime === 'image/svg+xml') {
- const resp = await GET(info.path);
- const text = await resp.text();
- const bounds = getDefaultSvgBoundsIfUndefined(text, info.path);
- if (bounds) {
- info.$images.each(function() {
- this.setAttribute('width', bounds.width);
- this.setAttribute('height', bounds.height);
- });
- hideElem(info.$boundsInfo);
- }
- }
- }));
-
- const $imagesAfter = imageInfos[0].$images;
- const $imagesBefore = imageInfos[1].$images;
-
- initSideBySide(this, createContext($imagesAfter[0], $imagesBefore[0]));
- if ($imagesAfter.length > 0 && $imagesBefore.length > 0) {
- initSwipe(createContext($imagesAfter[1], $imagesBefore[1]));
- initOverlay(createContext($imagesAfter[2], $imagesBefore[2]));
- }
-
- queryElemChildren(this, '.image-diff-tabs', (el) => el.classList.remove('is-loading'));
-
- function initSideBySide(container, sizes) {
- let factor = 1;
- if (sizes.maxSize.width > (diffContainerWidth - 24) / 2) {
- factor = (diffContainerWidth - 24) / 2 / sizes.maxSize.width;
- }
-
- const widthChanged = sizes.imageAfter && sizes.imageBefore && sizes.imageAfter.naturalWidth !== sizes.imageBefore.naturalWidth;
- const heightChanged = sizes.imageAfter && sizes.imageBefore && sizes.imageAfter.naturalHeight !== sizes.imageBefore.naturalHeight;
- if (sizes.imageAfter) {
- const boundsInfoAfterWidth = container.querySelector('.bounds-info-after .bounds-info-width');
- if (boundsInfoAfterWidth) {
- boundsInfoAfterWidth.textContent = `${sizes.imageAfter.naturalWidth}px`;
- boundsInfoAfterWidth.classList.toggle('green', widthChanged);
- }
- const boundsInfoAfterHeight = container.querySelector('.bounds-info-after .bounds-info-height');
- if (boundsInfoAfterHeight) {
- boundsInfoAfterHeight.textContent = `${sizes.imageAfter.naturalHeight}px`;
- boundsInfoAfterHeight.classList.toggle('green', heightChanged);
- }
- }
-
- if (sizes.imageBefore) {
- const boundsInfoBeforeWidth = container.querySelector('.bounds-info-before .bounds-info-width');
- if (boundsInfoBeforeWidth) {
- boundsInfoBeforeWidth.textContent = `${sizes.imageBefore.naturalWidth}px`;
- boundsInfoBeforeWidth.classList.toggle('red', widthChanged);
- }
- const boundsInfoBeforeHeight = container.querySelector('.bounds-info-before .bounds-info-height');
- if (boundsInfoBeforeHeight) {
- boundsInfoBeforeHeight.textContent = `${sizes.imageBefore.naturalHeight}px`;
- boundsInfoBeforeHeight.classList.add('red', heightChanged);
- }
- }
-
- if (sizes.imageAfter) {
- const container = sizes.imageAfter.parentNode;
- sizes.imageAfter.style.width = `${sizes.sizeAfter.width * factor}px`;
- sizes.imageAfter.style.height = `${sizes.sizeAfter.height * factor}px`;
- container.style.margin = '10px auto';
- container.style.width = `${sizes.sizeAfter.width * factor + 2}px`;
- container.style.height = `${sizes.sizeAfter.height * factor + 2}px`;
- }
-
- if (sizes.imageBefore) {
- const container = sizes.imageBefore.parentNode;
- sizes.imageBefore.style.width = `${sizes.sizeBefore.width * factor}px`;
- sizes.imageBefore.style.height = `${sizes.sizeBefore.height * factor}px`;
- container.style.margin = '10px auto';
- container.style.width = `${sizes.sizeBefore.width * factor + 2}px`;
- container.style.height = `${sizes.sizeBefore.height * factor + 2}px`;
- }
- }
-
- function initSwipe(sizes) {
- let factor = 1;
- if (sizes.maxSize.width > diffContainerWidth - 12) {
- factor = (diffContainerWidth - 12) / sizes.maxSize.width;
- }
-
- if (sizes.imageAfter) {
- const container = sizes.imageAfter.parentNode;
- const swipeFrame = container.parentNode;
- sizes.imageAfter.style.width = `${sizes.sizeAfter.width * factor}px`;
- sizes.imageAfter.style.height = `${sizes.sizeAfter.height * factor}px`;
- container.style.margin = `0px ${sizes.ratio[0] * factor}px`;
- container.style.width = `${sizes.sizeAfter.width * factor + 2}px`;
- container.style.height = `${sizes.sizeAfter.height * factor + 2}px`;
- swipeFrame.style.padding = `${sizes.ratio[1] * factor}px 0 0 0`;
- swipeFrame.style.width = `${sizes.maxSize.width * factor + 2}px`;
- }
-
- if (sizes.imageBefore) {
- const container = sizes.imageBefore.parentNode;
- const swipeFrame = container.parentNode;
- sizes.imageBefore.style.width = `${sizes.sizeBefore.width * factor}px`;
- sizes.imageBefore.style.height = `${sizes.sizeBefore.height * factor}px`;
- container.style.margin = `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`;
- container.style.width = `${sizes.sizeBefore.width * factor + 2}px`;
- container.style.height = `${sizes.sizeBefore.height * factor + 2}px`;
- swipeFrame.style.width = `${sizes.maxSize.width * factor + 2}px`;
- swipeFrame.style.height = `${sizes.maxSize.height * factor + 2}px`;
- }
-
- // extra height for inner "position: absolute" elements
- const swipe = $container.find('.diff-swipe')[0];
- if (swipe) {
- swipe.style.width = `${sizes.maxSize.width * factor + 2}px`;
- swipe.style.height = `${sizes.maxSize.height * factor + 30}px`;
- }
-
- $container.find('.swipe-bar').on('mousedown', function(e) {
- e.preventDefault();
-
- const $swipeBar = $(this);
- const $swipeFrame = $swipeBar.parent();
- const width = $swipeFrame.width() - $swipeBar.width() - 2;
-
- $(document).on('mousemove.diff-swipe', (e2) => {
- e2.preventDefault();
-
- const value = Math.max(0, Math.min(e2.clientX - $swipeFrame.offset().left, width));
- $swipeBar[0].style.left = `${value}px`;
- $container.find('.swipe-container')[0].style.width = `${$swipeFrame.width() - value}px`;
-
- $(document).on('mouseup.diff-swipe', () => {
- $(document).off('.diff-swipe');
- });
- });
- });
- }
-
- function initOverlay(sizes) {
- let factor = 1;
- if (sizes.maxSize.width > diffContainerWidth - 12) {
- factor = (diffContainerWidth - 12) / sizes.maxSize.width;
- }
-
- if (sizes.imageAfter) {
- const container = sizes.imageAfter.parentNode;
- sizes.imageAfter.style.width = `${sizes.sizeAfter.width * factor}px`;
- sizes.imageAfter.style.height = `${sizes.sizeAfter.height * factor}px`;
- container.style.margin = `${sizes.ratio[1] * factor}px ${sizes.ratio[0] * factor}px`;
- container.style.width = `${sizes.sizeAfter.width * factor + 2}px`;
- container.style.height = `${sizes.sizeAfter.height * factor + 2}px`;
- }
-
- if (sizes.imageBefore) {
- const container = sizes.imageBefore.parentNode;
- const overlayFrame = container.parentNode;
- sizes.imageBefore.style.width = `${sizes.sizeBefore.width * factor}px`;
- sizes.imageBefore.style.height = `${sizes.sizeBefore.height * factor}px`;
- container.style.margin = `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`;
- container.style.width = `${sizes.sizeBefore.width * factor + 2}px`;
- container.style.height = `${sizes.sizeBefore.height * factor + 2}px`;
-
- // some inner elements are `position: absolute`, so the container's height must be large enough
- overlayFrame.style.width = `${sizes.maxSize.width * factor + 2}px`;
- overlayFrame.style.height = `${sizes.maxSize.height * factor + 2}px`;
- }
-
- const rangeInput = $container[0].querySelector('input[type="range"]');
- function updateOpacity() {
- if (sizes.imageAfter) {
- sizes.imageAfter.parentNode.style.opacity = `${rangeInput.value / 100}`;
- }
- }
- rangeInput?.addEventListener('input', updateOpacity);
- updateOpacity();
- }
- });
- }
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