oppi.li
loading up the forgejo repo on tangled to test page performance
1import $ from 'jquery';
2import {GET} from '../modules/fetch.js';
3import {hideElem, loadElem, queryElemChildren} from '../utils/dom.js';
4import {parseDom} from '../utils.js';
5
6function getDefaultSvgBoundsIfUndefined(text, src) {
7 const DefaultSize = 300;
8 const MaxSize = 99999;
9
10 const svgDoc = parseDom(text, 'image/svg+xml');
11 const svg = svgDoc.documentElement;
12 const width = svg?.width?.baseVal;
13 const height = svg?.height?.baseVal;
14 if (width === undefined || height === undefined) {
15 return null; // in case some svg is invalid or doesn't have the width/height
16 }
17 if (width.unitType === SVGLength.SVG_LENGTHTYPE_PERCENTAGE || height.unitType === SVGLength.SVG_LENGTHTYPE_PERCENTAGE) {
18 const img = new Image();
19 img.src = src;
20 if (img.width > 1 && img.width < MaxSize && img.height > 1 && img.height < MaxSize) {
21 return {
22 width: img.width,
23 height: img.height,
24 };
25 }
26 if (svg.hasAttribute('viewBox')) {
27 const viewBox = svg.viewBox.baseVal;
28 return {
29 width: DefaultSize,
30 height: DefaultSize * viewBox.width / viewBox.height,
31 };
32 }
33 return {
34 width: DefaultSize,
35 height: DefaultSize,
36 };
37 }
38 return null;
39}
40
41function createContext(imageAfter, imageBefore) {
42 const sizeAfter = {
43 width: imageAfter?.width || 0,
44 height: imageAfter?.height || 0,
45 };
46 const sizeBefore = {
47 width: imageBefore?.width || 0,
48 height: imageBefore?.height || 0,
49 };
50 const maxSize = {
51 width: Math.max(sizeBefore.width, sizeAfter.width),
52 height: Math.max(sizeBefore.height, sizeAfter.height),
53 };
54
55 return {
56 imageAfter,
57 imageBefore,
58 sizeAfter,
59 sizeBefore,
60 maxSize,
61 ratio: [
62 Math.floor(maxSize.width - sizeAfter.width) / 2,
63 Math.floor(maxSize.height - sizeAfter.height) / 2,
64 Math.floor(maxSize.width - sizeBefore.width) / 2,
65 Math.floor(maxSize.height - sizeBefore.height) / 2,
66 ],
67 };
68}
69
70export function initImageDiff() {
71 $('.image-diff:not([data-image-diff-loaded])').each(async function() {
72 const $container = $(this);
73 this.setAttribute('data-image-diff-loaded', 'true');
74
75 // the container may be hidden by "viewed" checkbox, so use the parent's width for reference
76 const diffContainerWidth = Math.max($container.closest('.diff-file-box').width() - 300, 100);
77
78 const imageInfos = [{
79 path: this.getAttribute('data-path-after'),
80 mime: this.getAttribute('data-mime-after'),
81 $images: $container.find('img.image-after'), // matches 3 <img>
82 $boundsInfo: $container.find('.bounds-info-after'),
83 }, {
84 path: this.getAttribute('data-path-before'),
85 mime: this.getAttribute('data-mime-before'),
86 $images: $container.find('img.image-before'), // matches 3 <img>
87 $boundsInfo: $container.find('.bounds-info-before'),
88 }];
89
90 await Promise.all(imageInfos.map(async (info) => {
91 const [success] = await Promise.all(Array.from(info.$images, (img) => {
92 return loadElem(img, info.path);
93 }));
94 // only the first images is associated with $boundsInfo
95 if (!success) info.$boundsInfo.text('(image error)');
96 if (info.mime === 'image/svg+xml') {
97 const resp = await GET(info.path);
98 const text = await resp.text();
99 const bounds = getDefaultSvgBoundsIfUndefined(text, info.path);
100 if (bounds) {
101 info.$images.each(function() {
102 this.setAttribute('width', bounds.width);
103 this.setAttribute('height', bounds.height);
104 });
105 hideElem(info.$boundsInfo);
106 }
107 }
108 }));
109
110 const $imagesAfter = imageInfos[0].$images;
111 const $imagesBefore = imageInfos[1].$images;
112
113 initSideBySide(this, createContext($imagesAfter[0], $imagesBefore[0]));
114 if ($imagesAfter.length > 0 && $imagesBefore.length > 0) {
115 initSwipe(createContext($imagesAfter[1], $imagesBefore[1]));
116 initOverlay(createContext($imagesAfter[2], $imagesBefore[2]));
117 }
118
119 queryElemChildren(this, '.image-diff-tabs', (el) => el.classList.remove('is-loading'));
120
121 function initSideBySide(container, sizes) {
122 let factor = 1;
123 if (sizes.maxSize.width > (diffContainerWidth - 24) / 2) {
124 factor = (diffContainerWidth - 24) / 2 / sizes.maxSize.width;
125 }
126
127 const widthChanged = sizes.imageAfter && sizes.imageBefore && sizes.imageAfter.naturalWidth !== sizes.imageBefore.naturalWidth;
128 const heightChanged = sizes.imageAfter && sizes.imageBefore && sizes.imageAfter.naturalHeight !== sizes.imageBefore.naturalHeight;
129 if (sizes.imageAfter) {
130 const boundsInfoAfterWidth = container.querySelector('.bounds-info-after .bounds-info-width');
131 if (boundsInfoAfterWidth) {
132 boundsInfoAfterWidth.textContent = `${sizes.imageAfter.naturalWidth}px`;
133 boundsInfoAfterWidth.classList.toggle('green', widthChanged);
134 }
135 const boundsInfoAfterHeight = container.querySelector('.bounds-info-after .bounds-info-height');
136 if (boundsInfoAfterHeight) {
137 boundsInfoAfterHeight.textContent = `${sizes.imageAfter.naturalHeight}px`;
138 boundsInfoAfterHeight.classList.toggle('green', heightChanged);
139 }
140 }
141
142 if (sizes.imageBefore) {
143 const boundsInfoBeforeWidth = container.querySelector('.bounds-info-before .bounds-info-width');
144 if (boundsInfoBeforeWidth) {
145 boundsInfoBeforeWidth.textContent = `${sizes.imageBefore.naturalWidth}px`;
146 boundsInfoBeforeWidth.classList.toggle('red', widthChanged);
147 }
148 const boundsInfoBeforeHeight = container.querySelector('.bounds-info-before .bounds-info-height');
149 if (boundsInfoBeforeHeight) {
150 boundsInfoBeforeHeight.textContent = `${sizes.imageBefore.naturalHeight}px`;
151 boundsInfoBeforeHeight.classList.add('red', heightChanged);
152 }
153 }
154
155 if (sizes.imageAfter) {
156 const container = sizes.imageAfter.parentNode;
157 sizes.imageAfter.style.width = `${sizes.sizeAfter.width * factor}px`;
158 sizes.imageAfter.style.height = `${sizes.sizeAfter.height * factor}px`;
159 container.style.margin = '10px auto';
160 container.style.width = `${sizes.sizeAfter.width * factor + 2}px`;
161 container.style.height = `${sizes.sizeAfter.height * factor + 2}px`;
162 }
163
164 if (sizes.imageBefore) {
165 const container = sizes.imageBefore.parentNode;
166 sizes.imageBefore.style.width = `${sizes.sizeBefore.width * factor}px`;
167 sizes.imageBefore.style.height = `${sizes.sizeBefore.height * factor}px`;
168 container.style.margin = '10px auto';
169 container.style.width = `${sizes.sizeBefore.width * factor + 2}px`;
170 container.style.height = `${sizes.sizeBefore.height * factor + 2}px`;
171 }
172 }
173
174 function initSwipe(sizes) {
175 let factor = 1;
176 if (sizes.maxSize.width > diffContainerWidth - 12) {
177 factor = (diffContainerWidth - 12) / sizes.maxSize.width;
178 }
179
180 if (sizes.imageAfter) {
181 const container = sizes.imageAfter.parentNode;
182 const swipeFrame = container.parentNode;
183 sizes.imageAfter.style.width = `${sizes.sizeAfter.width * factor}px`;
184 sizes.imageAfter.style.height = `${sizes.sizeAfter.height * factor}px`;
185 container.style.margin = `0px ${sizes.ratio[0] * factor}px`;
186 container.style.width = `${sizes.sizeAfter.width * factor + 2}px`;
187 container.style.height = `${sizes.sizeAfter.height * factor + 2}px`;
188 swipeFrame.style.padding = `${sizes.ratio[1] * factor}px 0 0 0`;
189 swipeFrame.style.width = `${sizes.maxSize.width * factor + 2}px`;
190 }
191
192 if (sizes.imageBefore) {
193 const container = sizes.imageBefore.parentNode;
194 const swipeFrame = container.parentNode;
195 sizes.imageBefore.style.width = `${sizes.sizeBefore.width * factor}px`;
196 sizes.imageBefore.style.height = `${sizes.sizeBefore.height * factor}px`;
197 container.style.margin = `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`;
198 container.style.width = `${sizes.sizeBefore.width * factor + 2}px`;
199 container.style.height = `${sizes.sizeBefore.height * factor + 2}px`;
200 swipeFrame.style.width = `${sizes.maxSize.width * factor + 2}px`;
201 swipeFrame.style.height = `${sizes.maxSize.height * factor + 2}px`;
202 }
203
204 // extra height for inner "position: absolute" elements
205 const swipe = $container.find('.diff-swipe')[0];
206 if (swipe) {
207 swipe.style.width = `${sizes.maxSize.width * factor + 2}px`;
208 swipe.style.height = `${sizes.maxSize.height * factor + 30}px`;
209 }
210
211 $container.find('.swipe-bar').on('mousedown', function(e) {
212 e.preventDefault();
213
214 const $swipeBar = $(this);
215 const $swipeFrame = $swipeBar.parent();
216 const width = $swipeFrame.width() - $swipeBar.width() - 2;
217
218 $(document).on('mousemove.diff-swipe', (e2) => {
219 e2.preventDefault();
220
221 const value = Math.max(0, Math.min(e2.clientX - $swipeFrame.offset().left, width));
222 $swipeBar[0].style.left = `${value}px`;
223 $container.find('.swipe-container')[0].style.width = `${$swipeFrame.width() - value}px`;
224
225 $(document).on('mouseup.diff-swipe', () => {
226 $(document).off('.diff-swipe');
227 });
228 });
229 });
230 }
231
232 function initOverlay(sizes) {
233 let factor = 1;
234 if (sizes.maxSize.width > diffContainerWidth - 12) {
235 factor = (diffContainerWidth - 12) / sizes.maxSize.width;
236 }
237
238 if (sizes.imageAfter) {
239 const container = sizes.imageAfter.parentNode;
240 sizes.imageAfter.style.width = `${sizes.sizeAfter.width * factor}px`;
241 sizes.imageAfter.style.height = `${sizes.sizeAfter.height * factor}px`;
242 container.style.margin = `${sizes.ratio[1] * factor}px ${sizes.ratio[0] * factor}px`;
243 container.style.width = `${sizes.sizeAfter.width * factor + 2}px`;
244 container.style.height = `${sizes.sizeAfter.height * factor + 2}px`;
245 }
246
247 if (sizes.imageBefore) {
248 const container = sizes.imageBefore.parentNode;
249 const overlayFrame = container.parentNode;
250 sizes.imageBefore.style.width = `${sizes.sizeBefore.width * factor}px`;
251 sizes.imageBefore.style.height = `${sizes.sizeBefore.height * factor}px`;
252 container.style.margin = `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`;
253 container.style.width = `${sizes.sizeBefore.width * factor + 2}px`;
254 container.style.height = `${sizes.sizeBefore.height * factor + 2}px`;
255
256 // some inner elements are `position: absolute`, so the container's height must be large enough
257 overlayFrame.style.width = `${sizes.maxSize.width * factor + 2}px`;
258 overlayFrame.style.height = `${sizes.maxSize.height * factor + 2}px`;
259 }
260
261 const rangeInput = $container[0].querySelector('input[type="range"]');
262 function updateOpacity() {
263 if (sizes.imageAfter) {
264 sizes.imageAfter.parentNode.style.opacity = `${rangeInput.value / 100}`;
265 }
266 }
267 rangeInput?.addEventListener('input', updateOpacity);
268 updateOpacity();
269 }
270 });
271}