☰

YouTube Viewfinding

Zoom, rotate & crop YouTube videos

  1. // ==UserScript==
  2. // @name        YouTube Viewfinding
  3. // @version     0.20
  4. // @description Zoom, rotate & crop YouTube videos
  5. // @author      Callum Latham
  6. // @namespace   https://greasyfork.org/users/696211-ctl2
  7. // @license     GNU GPLv3
  8. // @compatible  chrome
  9. // @compatible  edge
  10. // @compatible  firefox Video dimensions affect page scrolling
  11. // @compatible  opera Video dimensions affect page scrolling
  12. // @match       *://www.youtube.com/*
  13. // @match       *://youtube.com/*
  14. // @require     https://update.greasyfork.org/scripts/446506/1588535/%24Config.js
  15. // @grant       GM.setValue
  16. // @grant       GM.getValue
  17. // @grant       GM.deleteValue
  18. // ==/UserScript==
  19.  
  20. /* global $Config */
  21.  
  22. (() => {
  23. const isEmbed = window.location.pathname.split('/')[1] === 'embed';
  24.  
  25. // Don't run in non-embed frames (e.g. stream chat frame)
  26. if (window.parent !== window && !isEmbed) {
  27. 	return;
  28. }
  29.  
  30. const VAR_ZOOM = '--viewfind-zoom';
  31. const LIMITS = {none: 'None', static: 'Static', fit: 'Fit'};
  32.  
  33. const $config = new $Config(
  34. 	'VIEWFIND_TREE',
  35. 	(() => {
  36. 		const isCSSRule = (() => {
  37. 			const wrapper = document.createElement('style');
  38. 			const regex = /\s/g;
  39. 			
  40. 			return (property, text) => {
  41. 				const ruleText = `${property}:${text};`;
  42. 				
  43. 				document.head.appendChild(wrapper);
  44. 				wrapper.sheet.insertRule(`:not(*){${ruleText}}`);
  45. 				
  46. 				const [{style: {cssText}}] = wrapper.sheet.cssRules;
  47. 				
  48. 				wrapper.remove();
  49. 				
  50. 				return cssText.replaceAll(regex, '') === ruleText.replaceAll(regex, '') || `Must be a valid CSS ${property} rule`;
  51. 			};
  52. 		})();
  53. 		
  54. 		const getHideId = (() => {
  55. 			let id = -1;
  56. 			
  57. 			return () => ++id;
  58. 		})();
  59. 		
  60. 		const glowHideId = getHideId();
  61. 		
  62. 		return {
  63. 			get: (_, configs) => Object.assign(...configs),
  64. 			children: [
  65. 				{
  66. 					label: 'Controls',
  67. 					children: [
  68. 						{
  69. 							label: 'Keybinds',
  70. 							descendantPredicate: ([actions, reset, configure]) => {
  71. 								const keybinds = [...actions.children.slice(1), reset, configure].map(({children}) => children.filter(({value}) => value !== '').map(({value}) => value));
  72. 								
  73. 								for (let i = 0; i < keybinds.length - 1; ++i) {
  74. 									for (let j = i + 1; j < keybinds.length; ++j) {
  75. 										if (keybinds[i].length === keybinds[j].length && keybinds[i].every((keyA) => keybinds[j].some((keyB) => keyA === keyB))) {
  76. 											return 'Another action has this keybind';
  77. 										}
  78. 									}
  79. 								}
  80. 								
  81. 								return true;
  82. 							},
  83. 							get: (_, configs) => ({keys: Object.assign(...configs)}),
  84. 							children: (() => {
  85. 								const seed = {
  86. 									value: '',
  87. 									listeners: {
  88. 										keydown: (event) => {
  89. 											switch (event.key) {
  90. 											case 'Enter':
  91. 											case 'Escape':
  92. 												return;
  93. 											}
  94. 											
  95. 											event.preventDefault();
  96. 											
  97. 											event.target.value = event.code;
  98. 											
  99. 											event.target.dispatchEvent(new InputEvent('input'));
  100. 										},
  101. 									},
  102. 								};
  103. 								
  104. 								const getKeys = (children) => new Set(children.filter(({value}) => value !== '').map(({value}) => value));
  105. 								
  106. 								const getNode = (label, keys, get) => ({
  107. 									label,
  108. 									seed,
  109. 									children: keys.map((value) => ({...seed, value})),
  110. 									get,
  111. 								});
  112. 								
  113. 								return [
  114. 									{
  115. 										label: 'Actions',
  116. 										get: (_, [toggle, ...controls]) => Object.assign(...controls.map(({id, keys}) => ({
  117. 											[id]: {
  118. 												toggle,
  119. 												keys,
  120. 											},
  121. 										}))),
  122. 										children: [
  123. 											{
  124. 												label: 'Toggle?',
  125. 												value: false,
  126. 												get: ({value}) => value,
  127. 											},
  128. 											...[
  129. 												['Pan / Zoom', ['KeyZ'], 'pan'],
  130. 												['Rotate', ['IntlBackslash'], 'rotate'],
  131. 												['Crop', ['KeyZ', 'IntlBackslash'], 'crop'],
  132. 											].map(([label, keys, id]) => getNode(label, keys, ({children}) => ({id, keys: getKeys(children)}))),
  133. 										],
  134. 									},
  135. 									getNode('Reset', ['KeyX'], ({children}) => ({reset: {keys: getKeys(children)}})),
  136. 									getNode('Configure', ['AltLeft', 'KeyX'], ({children}) => ({config: {keys: getKeys(children)}})),
  137. 								];
  138. 							})(),
  139. 						},
  140. 						{
  141. 							label: 'Scroll Speeds',
  142. 							get: (_, configs) => ({speeds: Object.assign(...configs)}),
  143. 							children: [
  144. 								{
  145. 									label: 'Zoom',
  146. 									value: -100,
  147. 									get: ({value}) => ({zoom: value / 150000}),
  148. 								},
  149. 								{
  150. 									label: 'Rotate',
  151. 									value: -100,
  152. 									// 150000 * (5 - 0.8) / 2π ≈ 100000
  153. 									get: ({value}) => ({rotate: value / 100000}),
  154. 								},
  155. 								{
  156. 									label: 'Crop',
  157. 									value: -100,
  158. 									get: ({value}) => ({crop: value / 300000}),
  159. 								},
  160. 							],
  161. 						},
  162. 						{
  163. 							label: 'Drag Inversions',
  164. 							get: (_, configs) => ({multipliers: Object.assign(...configs)}),
  165. 							children: [
  166. 								['Pan', 'pan'],
  167. 								['Rotate', 'rotate'],
  168. 								['Crop', 'crop'],
  169. 							].map(([label, key, value = false]) => ({
  170. 								label,
  171. 								value,
  172. 								get: ({value}) => ({[key]: value ? -1 : 1}),
  173. 							})),
  174. 						},
  175. 						{
  176. 							label: 'Click Movement Allowance (px)',
  177. 							value: 2,
  178. 							predicate: (value) => value >= 0 || 'Allowance must be positive',
  179. 							inputAttributes: {min: 0},
  180. 							get: ({value: clickCutoff}) => ({clickCutoff}),
  181. 						},
  182. 					],
  183. 				},
  184. 				{
  185. 					label: 'Behaviour',
  186. 					children: [
  187. 						...(() => {
  188. 							const typeNode = {
  189. 								label: 'Type',
  190. 								get: ({value}) => ({type: value}),
  191. 							};
  192. 							
  193. 							const hiddenNodes = {
  194. 								[LIMITS.static]: {
  195. 									label: 'Value (%)',
  196. 									predicate: (value) => value >= 0 || 'Limit must be positive',
  197. 									inputAttributes: {min: 0},
  198. 									get: ({value}) => ({custom: value / 100}),
  199. 								},
  200. 								[LIMITS.fit]: {
  201. 									label: 'Glow Allowance (%)',
  202. 									predicate: (value) => value >= 0 || 'Allowance must be positive',
  203. 									inputAttributes: {min: 0},
  204. 									get: ({value}) => ({frame: value / 100}),
  205. 								},
  206. 							};
  207. 							
  208. 							const getNode = (label, key, value, options, ...hidden) => {
  209. 								const hideIds = {};
  210. 								const children = [{...typeNode, value, options}];
  211. 								
  212. 								for (const {id, value} of hidden) {
  213. 									const node = {...hiddenNodes[id], value, hideId: getHideId()};
  214. 									
  215. 									hideIds[node.hideId] = id;
  216. 									
  217. 									children.push(node);
  218. 								}
  219. 								
  220. 								if (hidden.length > 0) {
  221. 									children[0].onUpdate = (value) => {
  222. 										const hide = {};
  223. 										
  224. 										for (const [id, type] of Object.entries(hideIds)) {
  225. 											hide[id] = value !== type;
  226. 										}
  227. 										
  228. 										return {hide};
  229. 									};
  230. 								}
  231. 								
  232. 								return {
  233. 									label,
  234. 									get: (_, configs) => ({[key]: Object.assign(...configs)}),
  235. 									children,
  236. 								};
  237. 							};
  238. 							
  239. 							return [
  240. 								getNode(
  241. 									'Zoom In Limit',
  242. 									'zoomInLimit',
  243. 									LIMITS.static,
  244. 									[LIMITS.none, LIMITS.static, LIMITS.fit],
  245. 									{id: LIMITS.static, value: 500},
  246. 									{id: LIMITS.fit, value: 0},
  247. 								),
  248. 								getNode(
  249. 									'Zoom Out Limit',
  250. 									'zoomOutLimit',
  251. 									LIMITS.static,
  252. 									[LIMITS.none, LIMITS.static, LIMITS.fit],
  253. 									{id: LIMITS.static, value: 80},
  254. 									{id: LIMITS.fit, value: 300},
  255. 								),
  256. 								getNode(
  257. 									'Pan Limit',
  258. 									'panLimit',
  259. 									LIMITS.static,
  260. 									[LIMITS.none, LIMITS.static, LIMITS.fit],
  261. 									{id: LIMITS.static, value: 50},
  262. 								),
  263. 								getNode(
  264. 									'Snap Pan Limit',
  265. 									'snapPanLimit',
  266. 									LIMITS.fit,
  267. 									[LIMITS.none, LIMITS.fit],
  268. 								),
  269. 							];
  270. 						})(),
  271. 						{
  272. 							label: 'While Viewfinding',
  273. 							get: (_, configs) => {
  274. 								const {overlayKill, overlayHide, ...config} = Object.assign(...configs);
  275. 								
  276. 								return {
  277. 									active: {
  278. 										overlayRule: overlayKill && [overlayHide ? 'display' : 'pointer-events', 'none'],
  279. 										...config,
  280. 									},
  281. 								};
  282. 							},
  283. 							children: [
  284. 								{
  285. 									label: 'Pause Video?',
  286. 									value: false,
  287. 									get: ({value: pause}) => ({pause}),
  288. 								},
  289. 								{
  290. 									label: 'Hide Glow?',
  291. 									value: false,
  292. 									get: ({value: hideGlow}) => ({hideGlow}),
  293. 									hideId: glowHideId,
  294. 								},
  295. 								...((hideId) => [
  296. 									{
  297. 										label: 'Disable Overlay?',
  298. 										value: true,
  299. 										get: ({value: overlayKill}, configs) => Object.assign({overlayKill}, ...configs),
  300. 										onUpdate: (value) => ({hide: {[hideId]: !value}}),
  301. 										children: [
  302. 											{
  303. 												label: 'Hide Overlay?',
  304. 												value: false,
  305. 												get: ({value: overlayHide}) => ({overlayHide}),
  306. 												hideId,
  307. 											},
  308. 										],
  309. 									},
  310. 								])(getHideId()),
  311. 							],
  312. 						},
  313. 						
  314. 					],
  315. 				},
  316. 				{
  317. 					label: 'Glow',
  318. 					value: true,
  319. 					onUpdate: (value) => ({hide: {[glowHideId]: !value}}),
  320. 					get: ({value: on}, configs) => {
  321. 						if (!on) {
  322. 							return {};
  323. 						}
  324. 						
  325. 						const {turnover, ...config} = Object.assign(...configs);
  326. 						const sampleCount = Math.floor(config.fps * turnover);
  327. 						
  328. 						// avoid taking more samples than there's space for
  329. 						if (sampleCount > config.size) {
  330. 							const fps = config.size / turnover;
  331. 							
  332. 							return {
  333. 								glow: {
  334. 									...config,
  335. 									sampleCount: config.size,
  336. 									interval: 1000 / fps,
  337. 									fps,
  338. 								},
  339. 							};
  340. 						}
  341. 						
  342. 						return {
  343. 							glow: {
  344. 								...config,
  345. 								interval: 1000 / config.fps,
  346. 								sampleCount,
  347. 							},
  348. 						};
  349. 					},
  350. 					children: [
  351. 						(() => {
  352. 							const [seed, getChild] = (() => {
  353. 								const options = ['blur', 'brightness', 'contrast', 'drop-shadow', 'grayscale', 'hue-rotate', 'invert', 'opacity', 'saturate', 'sepia'];
  354. 								const ids = {};
  355. 								const hide = {};
  356. 								
  357. 								for (const option of options) {
  358. 									ids[option] = getHideId();
  359. 									
  360. 									hide[ids[option]] = true;
  361. 								}
  362. 								
  363. 								const min0Amount = {
  364. 									label: 'Amount (%)',
  365. 									value: 100,
  366. 									predicate: (value) => value >= 0 || 'Amount must be positive',
  367. 									inputAttributes: {min: 0},
  368. 								};
  369. 								
  370. 								const max100Amount = {
  371. 									label: 'Amount (%)',
  372. 									value: 0,
  373. 									predicate: (value) => {
  374. 										if (value < 0) {
  375. 											return 'Amount must be positive';
  376. 										}
  377. 										
  378. 										return value <= 100 || 'Amount may not exceed 100%';
  379. 									},
  380. 									inputAttributes: {min: 0, max: 100},
  381. 								};
  382. 								
  383. 								const getScaled = (value) => `calc(${value}px/var(${VAR_ZOOM}))`;
  384. 								
  385. 								const root = {
  386. 									label: 'Function',
  387. 									options,
  388. 									value: options[0],
  389. 									get: ({value}, configs) => {
  390. 										const config = Object.assign(...configs);
  391. 										
  392. 										switch (value) {
  393. 										case options[0]:
  394. 											return {
  395. 												filter: config.blurScale ? `blur(${config.blur}px)` : `blur(${getScaled(config.blur)})`,
  396. 												blur: {
  397. 													x: config.blur,
  398. 													y: config.blur,
  399. 													scale: config.blurScale,
  400. 												},
  401. 											};
  402. 										
  403. 										case options[3]:
  404. 											return {
  405. 												filter: config.shadowScale ?
  406. 													`drop-shadow(${config.shadow} ${config.shadowX}px ${config.shadowY}px ${config.shadowSpread}px)` :
  407. 													`drop-shadow(${config.shadow} ${getScaled(config.shadowX)} ${getScaled(config.shadowY)} ${getScaled(config.shadowSpread)})`,
  408. 												blur: {
  409. 													x: config.shadowSpread + Math.abs(config.shadowX),
  410. 													y: config.shadowSpread + Math.abs(config.shadowY),
  411. 													scale: config.shadowScale,
  412. 												},
  413. 											};
  414. 										
  415. 										case options[5]:
  416. 											return {filter: `hue-rotate(${config.hueRotate}deg)`};
  417. 										}
  418. 										
  419. 										return {filter: `${value}(${config[value]}%)`};
  420. 									},
  421. 									onUpdate: (value) => ({hide: {...hide, [ids[value]]: false}}),
  422. 								};
  423. 								
  424. 								const children = {
  425. 									'blur': [
  426. 										{
  427. 											label: 'Distance (px)',
  428. 											value: 0,
  429. 											get: ({value}) => ({blur: value}),
  430. 											predicate: (value) => value >= 0 || 'Distance must be positive',
  431. 											inputAttributes: {min: 0},
  432. 											hideId: ids.blur,
  433. 										},
  434. 										{
  435. 											label: 'Scale?',
  436. 											value: false,
  437. 											get: ({value}) => ({blurScale: value}),
  438. 											hideId: ids.blur,
  439. 										},
  440. 									],
  441. 									'brightness': [
  442. 										{
  443. 											...min0Amount,
  444. 											hideId: ids.brightness,
  445. 											get: ({value}) => ({brightness: value}),
  446. 										},
  447. 									],
  448. 									'contrast': [
  449. 										{
  450. 											...min0Amount,
  451. 											hideId: ids.contrast,
  452. 											get: ({value}) => ({contrast: value}),
  453. 										},
  454. 									],
  455. 									'drop-shadow': [
  456. 										{
  457. 											label: 'Colour',
  458. 											input: 'color',
  459. 											value: '#FFFFFF',
  460. 											get: ({value}) => ({shadow: value}),
  461. 											hideId: ids['drop-shadow'],
  462. 										},
  463. 										{
  464. 											label: 'Horizontal Offset (px)',
  465. 											value: 0,
  466. 											get: ({value}) => ({shadowX: value}),
  467. 											hideId: ids['drop-shadow'],
  468. 										},
  469. 										{
  470. 											label: 'Vertical Offset (px)',
  471. 											value: 0,
  472. 											get: ({value}) => ({shadowY: value}),
  473. 											hideId: ids['drop-shadow'],
  474. 										},
  475. 										{
  476. 											label: 'Spread (px)',
  477. 											value: 0,
  478. 											predicate: (value) => value >= 0 || 'Spread must be positive',
  479. 											inputAttributes: {min: 0},
  480. 											get: ({value}) => ({shadowSpread: value}),
  481. 											hideId: ids['drop-shadow'],
  482. 										},
  483. 										{
  484. 											label: 'Scale?',
  485. 											value: true,
  486. 											get: ({value}) => ({shadowScale: value}),
  487. 											hideId: ids['drop-shadow'],
  488. 										},
  489. 									],
  490. 									'grayscale': [
  491. 										{
  492. 											...max100Amount,
  493. 											hideId: ids.grayscale,
  494. 											get: ({value}) => ({grayscale: value}),
  495. 										},
  496. 									],
  497. 									'hue-rotate': [
  498. 										{
  499. 											label: 'Angle (deg)',
  500. 											value: 0,
  501. 											get: ({value}) => ({hueRotate: value}),
  502. 											hideId: ids['hue-rotate'],
  503. 										},
  504. 									],
  505. 									'invert': [
  506. 										{
  507. 											...max100Amount,
  508. 											hideId: ids.invert,
  509. 											get: ({value}) => ({invert: value}),
  510. 										},
  511. 									],
  512. 									'opacity': [
  513. 										{
  514. 											...max100Amount,
  515. 											value: 100,
  516. 											hideId: ids.opacity,
  517. 											get: ({value}) => ({opacity: value}),
  518. 										},
  519. 									],
  520. 									'saturate': [
  521. 										{
  522. 											...min0Amount,
  523. 											hideId: ids.saturate,
  524. 											get: ({value}) => ({saturate: value}),
  525. 										},
  526. 									],
  527. 									'sepia': [
  528. 										{
  529. 											...max100Amount,
  530. 											hideId: ids.sepia,
  531. 											get: ({value}) => ({sepia: value}),
  532. 										},
  533. 									],
  534. 								};
  535. 								
  536. 								return [
  537. 									{...root, children: Object.values(children).flat()}, (id, ...values) => {
  538. 										const replacements = [];
  539. 										
  540. 										for (const [i, child] of children[id].entries()) {
  541. 											replacements.push({...child, value: values[i]});
  542. 										}
  543. 										
  544. 										return {
  545. 											...root,
  546. 											value: id,
  547. 											children: Object.values({...children, [id]: replacements}).flat(),
  548. 										};
  549. 									},
  550. 								];
  551. 							})();
  552. 							
  553. 							return {
  554. 								label: 'Filter',
  555. 								get: (_, configs) => {
  556. 									const scaled = {x: 0, y: 0};
  557. 									const unscaled = {x: 0, y: 0};
  558. 									
  559. 									let filter = '';
  560. 									
  561. 									for (const config of configs) {
  562. 										filter += config.filter;
  563. 										
  564. 										if ('blur' in config) {
  565. 											const target = config.blur.scale ? scaled : unscaled;
  566. 											
  567. 											target.x = Math.max(target.x, config.blur.x);
  568. 											target.y = Math.max(target.y, config.blur.y);
  569. 										}
  570. 									}
  571. 									
  572. 									return {filter, blur: {scaled, unscaled}};
  573. 								},
  574. 								children: [
  575. 									getChild('saturate', 150),
  576. 									getChild('brightness', 150),
  577. 									getChild('blur', 25, false),
  578. 								],
  579. 								seed,
  580. 							};
  581. 						})(),
  582. 						{
  583. 							label: 'Update',
  584. 							childPredicate: ([{value: fps}, {value: turnover}]) => fps * turnover >= 1 || `${turnover} second turnover cannot be achieved at ${fps} hertz`,
  585. 							children: [
  586. 								{
  587. 									label: 'Frequency (Hz)',
  588. 									value: 15,
  589. 									predicate: (value) => {
  590. 										if (value > 144) {
  591. 											return 'Update frequency may not be above 144 hertz';
  592. 										}
  593. 										
  594. 										return value >= 0 || 'Update frequency must be positive';
  595. 									},
  596. 									inputAttributes: {min: 0, max: 144},
  597. 									get: ({value: fps}) => ({fps}),
  598. 								},
  599. 								{
  600. 									label: 'Turnover Time (s)',
  601. 									value: 3,
  602. 									predicate: (value) => value >= 0 || 'Turnover time must be positive',
  603. 									inputAttributes: {min: 0},
  604. 									get: ({value: turnover}) => ({turnover}),
  605. 								},
  606. 								{
  607. 									label: 'Reverse?',
  608. 									value: false,
  609. 									get: ({value: doFlip}) => ({doFlip}),
  610. 								},
  611. 							],
  612. 						},
  613. 						{
  614. 							label: 'Size (px)',
  615. 							value: 50,
  616. 							predicate: (value) => value >= 0 || 'Size must be positive',
  617. 							inputAttributes: {min: 0},
  618. 							get: ({value}) => ({size: value}),
  619. 						},
  620. 						{
  621. 							label: 'End Point (%)',
  622. 							value: 103,
  623. 							predicate: (value) => value >= 0 || 'End point must be positive',
  624. 							inputAttributes: {min: 0},
  625. 							get: ({value}) => ({end: value / 100}),
  626. 						},
  627. 					].map((node) => ({...node, hideId: glowHideId})),
  628. 				},
  629. 				{
  630. 					label: 'Interfaces',
  631. 					children: [
  632. 						{
  633. 							label: 'Crop',
  634. 							get: (_, configs) => ({crop: Object.assign(...configs)}),
  635. 							children: [
  636. 								{
  637. 									label: 'Colours',
  638. 									get: (_, configs) => ({colour: Object.assign(...configs)}),
  639. 									children: [
  640. 										{
  641. 											label: 'Fill',
  642. 											get: (_, [colour, opacity]) => ({fill: `${colour}${opacity}`}),
  643. 											children: [
  644. 												{
  645. 													label: 'Colour',
  646. 													value: '#808080',
  647. 													input: 'color',
  648. 													get: ({value}) => value,
  649. 												},
  650. 												{
  651. 													label: 'Opacity (%)',
  652. 													value: 40,
  653. 													predicate: (value) => {
  654. 														if (value < 0) {
  655. 															return 'Opacity must be positive';
  656. 														}
  657. 														
  658. 														return value <= 100 || 'Opacity may not exceed 100%';
  659. 													},
  660. 													inputAttributes: {min: 0, max: 100},
  661. 													get: ({value}) => Math.round(255 * value / 100).toString(16),
  662. 												},
  663. 											],
  664. 										},
  665. 										{
  666. 											label: 'Shadow',
  667. 											value: '#000000',
  668. 											input: 'color',
  669. 											get: ({value: shadow}) => ({shadow}),
  670. 										},
  671. 										{
  672. 											label: 'Border',
  673. 											value: '#ffffff',
  674. 											input: 'color',
  675. 											get: ({value: border}) => ({border}),
  676. 										},
  677. 									],
  678. 								},
  679. 								{
  680. 									label: 'Handle Size (%)',
  681. 									value: 6,
  682. 									predicate: (value) => {
  683. 										if (value < 0) {
  684. 											return 'Size must be positive';
  685. 										}
  686. 										
  687. 										return value <= 50 || 'Size may not exceed 50%';
  688. 									},
  689. 									inputAttributes: {min: 0, max: 50},
  690. 									get: ({value}) => ({handle: value / 100}),
  691. 								},
  692. 							],
  693. 						},
  694. 						{
  695. 							label: 'Crosshair',
  696. 							get: (value, configs) => ({crosshair: Object.assign(...configs)}),
  697. 							children: [
  698. 								{
  699. 									label: 'Outer Thickness (px)',
  700. 									value: 3,
  701. 									predicate: (value) => value >= 0 || 'Thickness must be positive',
  702. 									inputAttributes: {min: 0},
  703. 									get: ({value: outer}) => ({outer}),
  704. 								},
  705. 								{
  706. 									label: 'Inner Thickness (px)',
  707. 									value: 1,
  708. 									predicate: (value) => value >= 0 || 'Thickness must be positive',
  709. 									inputAttributes: {min: 0},
  710. 									get: ({value: inner}) => ({inner}),
  711. 								},
  712. 								{
  713. 									label: 'Inner Diameter (px)',
  714. 									value: 157,
  715. 									predicate: (value) => value >= 0 || 'Diameter must be positive',
  716. 									inputAttributes: {min: 0},
  717. 									get: ({value: gap}) => ({gap}),
  718. 								},
  719. 								((hideId) => ({
  720. 									label: 'Text',
  721. 									value: true,
  722. 									onUpdate: (value) => ({hide: {[hideId]: !value}}),
  723. 									get: ({value}, configs) => {
  724. 										if (!value) {
  725. 											return {};
  726. 										}
  727. 										
  728. 										const {translateX, translateY, ...config} = Object.assign(...configs);
  729. 										
  730. 										return {
  731. 											text: {
  732. 												translate: {
  733. 													x: translateX,
  734. 													y: translateY,
  735. 												},
  736. 												...config,
  737. 											},
  738. 										};
  739. 									},
  740. 									children: [
  741. 										{
  742. 											label: 'Font',
  743. 											value: '30px "Harlow Solid", cursive',
  744. 											predicate: isCSSRule.bind(null, 'font'),
  745. 											get: ({value: font}) => ({font}),
  746. 										},
  747. 										{
  748. 											label: 'Position (%)',
  749. 											get: (_, configs) => ({position: Object.assign(...configs)}),
  750. 											children: ['x', 'y'].map((label) => ({
  751. 												label,
  752. 												value: 0,
  753. 												predicate: (value) => Math.abs(value) <= 50 || 'Position must be on-screen',
  754. 												inputAttributes: {min: -50, max: 50},
  755. 												get: ({value}) => ({[label]: value + 50}),
  756. 											})),
  757. 										},
  758. 										{
  759. 											label: 'Offset (px)',
  760. 											get: (_, configs) => ({offset: Object.assign(...configs)}),
  761. 											children: [
  762. 												{
  763. 													label: 'x',
  764. 													value: -6,
  765. 													get: ({value: x}) => ({x}),
  766. 												},
  767. 												{
  768. 													label: 'y',
  769. 													value: -25,
  770. 													get: ({value: y}) => ({y}),
  771. 												},
  772. 											],
  773. 										},
  774. 										(() => {
  775. 											const options = ['Left', 'Center', 'Right'];
  776. 											
  777. 											return {
  778. 												label: 'Alignment',
  779. 												value: options[2],
  780. 												options,
  781. 												get: ({value}) => ({align: value.toLowerCase(), translateX: options.indexOf(value) * -50}),
  782. 											};
  783. 										})(),
  784. 										(() => {
  785. 											const options = ['Top', 'Middle', 'Bottom'];
  786. 											
  787. 											return {
  788. 												label: 'Baseline',
  789. 												value: options[0],
  790. 												options,
  791. 												get: ({value}) => ({translateY: options.indexOf(value) * -50}),
  792. 											};
  793. 										})(),
  794. 										{
  795. 											label: 'Line height (%)',
  796. 											value: 90,
  797. 											predicate: (value) => value >= 0 || 'Height must be positive',
  798. 											inputAttributes: {min: 0},
  799. 											get: ({value}) => ({height: value / 100}),
  800. 										},
  801. 									].map((node) => ({...node, hideId})),
  802. 								}))(getHideId()),
  803. 								{
  804. 									label: 'Colours',
  805. 									get: (_, configs) => ({colour: Object.assign(...configs)}),
  806. 									children: [
  807. 										{
  808. 											label: 'Fill',
  809. 											value: '#ffffff',
  810. 											input: 'color',
  811. 											get: ({value: fill}) => ({fill}),
  812. 										},
  813. 										{
  814. 											label: 'Shadow',
  815. 											value: '#000000',
  816. 											input: 'color',
  817. 											get: ({value: shadow}) => ({shadow}),
  818. 										},
  819. 									],
  820. 								},
  821. 							],
  822. 						},
  823. 					],
  824. 				},
  825. 			],
  826. 		};
  827. 	})(),
  828. 	{
  829. 		defaultStyle: {
  830. 			headBase: '#c80000',
  831. 			headButtonExit: '#000000',
  832. 			borderHead: '#ffffff',
  833. 			borderTooltip: '#c80000',
  834. 			width: Math.min(90, screen.width / 16),
  835. 			height: 90,
  836. 		},
  837. 		outerStyle: {
  838. 			zIndex: 10000,
  839. 			scrollbarColor: 'initial',
  840. 		},
  841. 		patches: [
  842. 			// removing "Glow Allowance" from pan limits
  843. 			({children: [, {children}]}) => {
  844. 				// pan
  845. 				children[2].children.splice(2, 1);
  846. 				// snap pan
  847. 				children[3].children.splice(1, 1);
  848. 			},
  849. 		],
  850. 	},
  851. );
  852.  
  853. const CLASS_VIEWFINDER = 'viewfind-element';
  854. const DEGREES = {
  855. 	45: Math.PI / 4,
  856. 	90: Math.PI / 2,
  857. 	180: Math.PI,
  858. 	270: Math.PI / 2 * 3,
  859. 	360: Math.PI * 2,
  860. };
  861. const SELECTOR_VIDEO = '#movie_player video.html5-main-video';
  862.  
  863. // STATE
  864.  
  865. // elements
  866. let video;
  867. let altTarget;
  868. let viewport;
  869. let cinematics;
  870.  
  871. // derived values
  872. let videoTheta;
  873. let videoHypotenuse;
  874. let isThin;
  875. let viewportRatio;
  876. let viewportRatioInverse;
  877. const halfDimensions = {
  878. 	video: {},
  879. 	viewport: {},
  880. };
  881.  
  882. // other
  883. let stopped = true;
  884. let stopDrag;
  885.  
  886. const handleVideoChange = () => {
  887. 	DimensionCache.id++;
  888. 	
  889. 	halfDimensions.video.width = video.clientWidth / 2;
  890. 	halfDimensions.video.height = video.clientHeight / 2;
  891. 	
  892. 	videoTheta = getTheta(0, 0, video.clientWidth, video.clientHeight);
  893. 	videoHypotenuse = Math.sqrt(halfDimensions.video.width * halfDimensions.video.width + halfDimensions.video.height * halfDimensions.video.height);
  894. };
  895.  
  896. const handleViewportChange = () => {
  897. 	DimensionCache.id++;
  898. 	
  899. 	isThin = getTheta(0, 0, viewport.clientWidth, viewport.clientHeight) < videoTheta;
  900. 	
  901. 	halfDimensions.viewport.width = viewport.clientWidth / 2;
  902. 	halfDimensions.viewport.height = viewport.clientHeight / 2;
  903. 	
  904. 	viewportRatio = viewport.clientWidth / viewport.clientHeight;
  905. 	viewportRatioInverse = 1 / viewportRatio;
  906. 	
  907. 	position.constrain();
  908. 	
  909. 	glow.handleViewChange(true);
  910. };
  911.  
  912. // ROTATION HELPERS
  913.  
  914. const getTheta = (fromX, fromY, toX, toY) => Math.atan2(toY - fromY, toX - fromX);
  915.  
  916. const getRotatedCorners = (radius, theta) => {
  917. 	const angle0 = DEGREES[90] - theta + rotation.value;
  918. 	const angle1 = theta + rotation.value - DEGREES[90];
  919. 	
  920. 	return [
  921. 		{
  922. 			x: Math.abs(radius * Math.cos(angle0)),
  923. 			y: Math.abs(radius * Math.sin(angle0)),
  924. 		},
  925. 		{
  926. 			x: Math.abs(radius * Math.cos(angle1)),
  927. 			y: Math.abs(radius * Math.sin(angle1)),
  928. 		},
  929. 	];
  930. };
  931.  
  932. // CSS HELPER
  933.  
  934. const css = new function () {
  935. 	this.has = (name) => document.body.classList.contains(name);
  936. 	this.tag = (name, doAdd = true) => document.body.classList[doAdd ? 'add' : 'remove'](name);
  937. 	
  938. 	this.getSelector = (...classes) => `body.${classes.join('.')}`;
  939. 	
  940. 	const getSheet = () => {
  941. 		const element = document.createElement('style');
  942. 		
  943. 		document.head.appendChild(element);
  944. 		
  945. 		return element.sheet;
  946. 	};
  947. 	
  948. 	const getRuleString = (selector, ...declarations) => `${selector}{${declarations.map(([property, value]) => `${property}:${value};`).join('')}}`;
  949. 	
  950. 	this.add = function (...rule) {
  951. 		this.insertRule(getRuleString(...rule));
  952. 	}.bind(getSheet());
  953. 	
  954. 	this.Toggleable = class {
  955. 		static sheet = getSheet();
  956. 		
  957. 		static active = [];
  958. 		
  959. 		static id = 0;
  960. 		
  961. 		static add(rule, id) {
  962. 			this.sheet.insertRule(rule, this.active.length);
  963. 			
  964. 			this.active.push(id);
  965. 		}
  966. 		
  967. 		static remove(id) {
  968. 			let index = this.active.indexOf(id);
  969. 			
  970. 			while (index >= 0) {
  971. 				this.sheet.deleteRule(index);
  972. 				
  973. 				this.active.splice(index, 1);
  974. 				
  975. 				index = this.active.indexOf(id);
  976. 			}
  977. 		}
  978. 		
  979. 		id = this.constructor.id++;
  980. 		
  981. 		add(...rule) {
  982. 			this.constructor.add(getRuleString(...rule), this.id);
  983. 		}
  984. 		
  985. 		remove() {
  986. 			this.constructor.remove(this.id);
  987. 		}
  988. 	};
  989. }();
  990.  
  991. // ACTION MANAGER
  992.  
  993. const enabler = new function () {
  994. 	this.CLASS_ABLE = 'viewfind-action-able';
  995. 	this.CLASS_DRAGGING = 'viewfind-action-dragging';
  996. 	
  997. 	this.keys = new Set();
  998. 	
  999. 	this.didPause = false;
  1000. 	this.isHidingGlow = false;
  1001. 	
  1002. 	this.setActive = (action) => {
  1003. 		const {active, keys} = $config.get();
  1004. 		
  1005. 		if (active.hideGlow && Boolean(action) !== this.isHidingGlow) {
  1006. 			if (action) {
  1007. 				this.isHidingGlow = true;
  1008. 				
  1009. 				glow.hide();
  1010. 			} else if (this.isHidingGlow) {
  1011. 				this.isHidingGlow = false;
  1012. 				
  1013. 				glow.show();
  1014. 			}
  1015. 		}
  1016. 		
  1017. 		this.activeAction?.onInactive?.();
  1018. 		
  1019. 		if (action) {
  1020. 			this.activeAction = action;
  1021. 			this.toggled = keys[action.CODE].toggle;
  1022. 			
  1023. 			action.onActive?.();
  1024. 			
  1025. 			if (active.pause && !video.paused) {
  1026. 				video.pause();
  1027. 				
  1028. 				this.didPause = true;
  1029. 			}
  1030. 			
  1031. 			return;
  1032. 		}
  1033. 		
  1034. 		if (this.didPause) {
  1035. 			video.play();
  1036. 			
  1037. 			this.didPause = false;
  1038. 		}
  1039. 		
  1040. 		this.activeAction = this.toggled = undefined;
  1041. 	};
  1042. 	
  1043. 	this.handleChange = () => {
  1044. 		if (stopped || stopDrag || video.ended) {
  1045. 			return;
  1046. 		}
  1047. 		
  1048. 		const {keys} = $config.get();
  1049. 		
  1050. 		let activeAction;
  1051. 		
  1052. 		for (const action of Object.values(actions)) {
  1053. 			if (
  1054. 				keys[action.CODE].keys.size === 0 || !this.keys.isSupersetOf(keys[action.CODE].keys) || activeAction && ('toggle' in keys[action.CODE] ?
  1055. 					!('toggle' in keys[activeAction.CODE]) || keys[activeAction.CODE].keys.size >= keys[action.CODE].keys.size :
  1056. 					!('toggle' in keys[activeAction.CODE]) && keys[activeAction.CODE].keys.size >= keys[action.CODE].keys.size)
  1057. 			) {
  1058. 				if ('CLASS_ABLE' in action) {
  1059. 					css.tag(action.CLASS_ABLE, false);
  1060. 				}
  1061. 				
  1062. 				continue;
  1063. 			}
  1064. 			
  1065. 			if (activeAction && 'CLASS_ABLE' in activeAction) {
  1066. 				css.tag(activeAction.CLASS_ABLE, false);
  1067. 			}
  1068. 			
  1069. 			activeAction = action;
  1070. 		}
  1071. 		
  1072. 		if (activeAction === this.activeAction) {
  1073. 			return;
  1074. 		}
  1075. 		
  1076. 		if (activeAction) {
  1077. 			if ('CLASS_ABLE' in activeAction) {
  1078. 				css.tag(activeAction.CLASS_ABLE);
  1079. 				
  1080. 				css.tag(this.CLASS_ABLE);
  1081. 				
  1082. 				this.setActive(activeAction);
  1083. 				
  1084. 				return;
  1085. 			}
  1086. 			
  1087. 			this.activeAction?.onInactive?.();
  1088. 			
  1089. 			activeAction.onActive();
  1090. 			
  1091. 			this.activeAction = activeAction;
  1092. 		}
  1093. 		
  1094. 		css.tag(this.CLASS_ABLE, false);
  1095. 		
  1096. 		this.setActive(false);
  1097. 	};
  1098. 	
  1099. 	this.stop = () => {
  1100. 		css.tag(this.CLASS_ABLE, false);
  1101. 		
  1102. 		for (const action of Object.values(actions)) {
  1103. 			if ('CLASS_ABLE' in action) {
  1104. 				css.tag(action.CLASS_ABLE, false);
  1105. 			}
  1106. 		}
  1107. 		
  1108. 		this.setActive(false);
  1109. 	};
  1110. 	
  1111. 	this.updateConfig = (() => {
  1112. 		const rule = new css.Toggleable();
  1113. 		const selector = `${css.getSelector(this.CLASS_ABLE)} #contentContainer.tp-yt-app-drawer[swipe-open]::after`
  1114. 			+ `,${css.getSelector(this.CLASS_ABLE)} #movie_player > .html5-video-container ~ :not(.${CLASS_VIEWFINDER})`;
  1115. 		
  1116. 		return () => {
  1117. 			const {overlayRule} = $config.get().active;
  1118. 			
  1119. 			rule.remove();
  1120. 			
  1121. 			if (overlayRule) {
  1122. 				rule.add(selector, overlayRule);
  1123. 			}
  1124. 		};
  1125. 	})();
  1126. 	
  1127. 	$config.ready.then(() => {
  1128. 		this.updateConfig();
  1129. 	});
  1130. 	
  1131. 	// insertion order decides priority
  1132. 	css.add(`${css.getSelector(this.CLASS_DRAGGING)} #movie_player`, ['cursor', 'grabbing']);
  1133. 	css.add(`${css.getSelector(this.CLASS_ABLE)} #movie_player`, ['cursor', 'grab']);
  1134. }();
  1135.  
  1136. // ELEMENT CONTAINER SETUP
  1137.  
  1138. const containers = new function () {
  1139. 	for (const name of ['background', 'foreground', 'tracker']) {
  1140. 		this[name] = document.createElement('div');
  1141. 		
  1142. 		this[name].classList.add(CLASS_VIEWFINDER);
  1143. 	}
  1144. 	
  1145. 	// make an outline of the uncropped video
  1146. 	css.add(`${css.getSelector(enabler.CLASS_ABLE)} #${this.foreground.id = 'viewfind-outlined'}`, ['outline', '1px solid white']);
  1147. 	
  1148. 	this.background.style.position = this.foreground.style.position = 'absolute';
  1149. 	this.background.style.pointerEvents = this.foreground.style.pointerEvents = this.tracker.style.pointerEvents = 'none';
  1150. 	this.tracker.style.height = this.tracker.style.width = '100%';
  1151. }();
  1152.  
  1153. // MODIFIERS
  1154.  
  1155. class Cache {
  1156. 	targets = [];
  1157. 	
  1158. 	constructor(...targets) {
  1159. 		for (const source of targets) {
  1160. 			this.targets.push({source});
  1161. 		}
  1162. 	}
  1163. 	
  1164. 	update(target) {
  1165. 		return target.value !== (target.value = target.source.value);
  1166. 	}
  1167. 	
  1168. 	isStale() {
  1169. 		return this.targets.reduce((value, target) => value || this.update(target), false);
  1170. 	}
  1171. }
  1172.  
  1173. class ConfigCache extends Cache {
  1174. 	static id = 0;
  1175. 	
  1176. 	id = this.constructor.id;
  1177. 	
  1178. 	constructor(...targets) {
  1179. 		super(...targets);
  1180. 	}
  1181. 	
  1182. 	isStale() {
  1183. 		if (this.id === (this.id = this.constructor.id)) {
  1184. 			return super.isStale();
  1185. 		}
  1186. 		
  1187. 		for (const target of this.targets) {
  1188. 			target.value = target.source.value;
  1189. 		}
  1190. 		
  1191. 		return true;
  1192. 	}
  1193. }
  1194.  
  1195. class DimensionCache extends ConfigCache {
  1196. 	static id = 0;
  1197. }
  1198.  
  1199. const rotation = new function () {
  1200. 	this.value = DEGREES[90];
  1201. 	
  1202. 	this.reset = () => {
  1203. 		this.value = DEGREES[90];
  1204. 		
  1205. 		video.style.removeProperty('rotate');
  1206. 	};
  1207. 	
  1208. 	this.apply = () => {
  1209. 		// Conversion from anticlockwise rotation from the x-axis to clockwise rotation from the y-axis
  1210. 		video.style.setProperty('rotate', `${DEGREES[90] - this.value}rad`);
  1211. 		
  1212. 		delete actions.reset.restore;
  1213. 	};
  1214. 	
  1215. 	// dissimilar from other constrain functions in that no effective limit is applied
  1216. 	// -1.5π < rotation <= 0.5π
  1217. 	// 0 <= 0.5π - rotation < 2π
  1218. 	this.constrain = () => {
  1219. 		this.value %= DEGREES[360];
  1220. 		
  1221. 		if (this.value > DEGREES[90]) {
  1222. 			this.value -= DEGREES[360];
  1223. 		} else if (this.value <= -DEGREES[270]) {
  1224. 			this.value += DEGREES[360];
  1225. 		}
  1226. 		
  1227. 		this.apply();
  1228. 	};
  1229. }();
  1230.  
  1231. const zoom = new function () {
  1232. 	this.value = 1;
  1233. 	
  1234. 	const scaleRule = new css.Toggleable();
  1235. 	
  1236. 	this.reset = () => {
  1237. 		this.value = 1;
  1238. 		
  1239. 		video.style.removeProperty('scale');
  1240. 		
  1241. 		scaleRule.remove();
  1242. 		scaleRule.add(':root', [VAR_ZOOM, '1']);
  1243. 	};
  1244. 	
  1245. 	this.apply = () => {
  1246. 		video.style.setProperty('scale', `${this.value}`);
  1247. 		
  1248. 		scaleRule.remove();
  1249. 		scaleRule.add(':root', [VAR_ZOOM, `${this.value}`]);
  1250. 		
  1251. 		delete actions.reset.restore;
  1252. 	};
  1253. 	
  1254. 	const getFit = (corner0, corner1, doSplit = false) => {
  1255. 		const x = Math.max(corner0.x, corner1.x) / viewport.clientWidth;
  1256. 		const y = Math.max(corner0.y, corner1.y) / viewport.clientHeight;
  1257. 		
  1258. 		return doSplit ? [0.5 / x, 0.5 / y] : 0.5 / Math.max(x, y);
  1259. 	};
  1260. 	
  1261. 	this.getFit = (width, height) => getFit(...getRotatedCorners(Math.sqrt(width * width + height * height), getTheta(0, 0, width, height)));
  1262. 	this.getVideoFit = (doSplit) => getFit(...getRotatedCorners(videoHypotenuse, videoTheta), doSplit);
  1263. 	
  1264. 	this.constrain = (() => {
  1265. 		const limitGetters = {
  1266. 			[LIMITS.static]: [({custom}) => custom, ({custom}) => custom],
  1267. 			[LIMITS.fit]: (() => {
  1268. 				const getGetter = () => {
  1269. 					const zoomCache = new Cache(this);
  1270. 					const rotationCache = new DimensionCache(rotation);
  1271. 					const configCache = new ConfigCache();
  1272. 					
  1273. 					let updateOnZoom;
  1274. 					
  1275. 					let value;
  1276. 					
  1277. 					return ({frame}, glow) => {
  1278. 						let fallthrough = rotationCache.isStale();
  1279. 						
  1280. 						if (configCache.isStale()) {
  1281. 							if (glow) {
  1282. 								const {scaled} = glow.blur;
  1283. 								
  1284. 								updateOnZoom = frame > 0 && (scaled.x > 0 || scaled.y > 0);
  1285. 							} else {
  1286. 								updateOnZoom = false;
  1287. 							}
  1288. 							
  1289. 							fallthrough = true;
  1290. 						}
  1291. 						
  1292. 						if (zoomCache.isStale() && updateOnZoom || fallthrough) {
  1293. 							if (glow) {
  1294. 								const base = glow.end - 1;
  1295. 								const {scaled, unscaled} = glow.blur;
  1296. 								
  1297. 								value = this.getFit(
  1298. 									halfDimensions.video.width + Math.max(0, base * halfDimensions.video.width + Math.max(unscaled.x, scaled.x * this.value)) * frame,
  1299. 									halfDimensions.video.height + Math.max(0, base * halfDimensions.video.height + Math.max(unscaled.y, scaled.y * this.value)) * frame,
  1300. 								);
  1301. 							} else {
  1302. 								value = this.getVideoFit();
  1303. 							}
  1304. 						}
  1305. 						
  1306. 						return value;
  1307. 					};
  1308. 				};
  1309. 				
  1310. 				return [getGetter(), getGetter()];
  1311. 			})(),
  1312. 		};
  1313. 		
  1314. 		return () => {
  1315. 			const {zoomOutLimit, zoomInLimit, glow} = $config.get();
  1316. 			
  1317. 			if (zoomOutLimit.type !== 'None') {
  1318. 				this.value = Math.max(limitGetters[zoomOutLimit.type][0](zoomOutLimit, glow), this.value);
  1319. 			}
  1320. 			
  1321. 			if (zoomInLimit.type !== 'None') {
  1322. 				this.value = Math.min(limitGetters[zoomInLimit.type][1](zoomInLimit, glow, 1), this.value);
  1323. 			}
  1324. 			
  1325. 			this.apply();
  1326. 		};
  1327. 	})();
  1328. }();
  1329.  
  1330. const position = new function () {
  1331. 	this.x = this.y = 0;
  1332. 	
  1333. 	this.getValues = () => ({x: this.x, y: this.y});
  1334. 	
  1335. 	this.reset = () => {
  1336. 		this.x = this.y = 0;
  1337. 		
  1338. 		video.style.removeProperty('translate');
  1339. 	};
  1340. 	
  1341. 	this.apply = () => {
  1342. 		video.style.setProperty('transform-origin', `${(0.5 + this.x) * 100}% ${(0.5 - this.y) * 100}%`);
  1343. 		video.style.setProperty('translate', `${-this.x * 100}% ${this.y * 100}%`);
  1344. 		
  1345. 		delete actions.reset.restore;
  1346. 	};
  1347. 	
  1348. 	this.constrain = (() => {
  1349. 		// logarithmic progress from "low" to infinity
  1350. 		const getProgress = (low, target) => 1 - low / target;
  1351. 		
  1352. 		const getProgressed = ({x: fromX, y: fromY, z: lowZ}, {x: toX, y: toY}, targetZ) => {
  1353. 			const p = getProgress(lowZ, targetZ);
  1354. 			
  1355. 			return {x: p * (toX - fromX) + fromX, y: p * (toY - fromY) + fromY};
  1356. 		};
  1357. 		
  1358. 		// y = mx + c
  1359. 		const getLineY = ({m, c}, x = this.x) => m * x + c;
  1360. 		// x = (y - c) / m
  1361. 		const getLineX = ({m, c}, y = this.y) => (y - c) / m;
  1362. 		
  1363. 		const getM = (from, to) => (to.y - from.y) / (to.x - from.x);
  1364. 		const getLine = (m, {x, y}) => ({c: y - m * x, m});
  1365. 		const getFlipped = ({x, y}) => ({x: -x, y: -y});
  1366. 		
  1367. 		const correctY = (line, left, right) => {
  1368. 			if (this.x >= left.x && this.x <= right.x) {
  1369. 				this.y = getLineY(line, this.x);
  1370. 				
  1371. 				return true;
  1372. 			}
  1373. 		};
  1374. 		
  1375. 		const correctX = (line, bottom, top) => {
  1376. 			if (this.y >= bottom.y && this.y <= top.y) {
  1377. 				this.x = getLineX(line, this.y);
  1378. 				
  1379. 				return true;
  1380. 			}
  1381. 		};
  1382. 		
  1383. 		const isAbove = ({m, c}, {x, y} = this) => m * x + c < y;
  1384. 		const isRight = ({m, c}, {x, y} = this) => (y - c) / m < x;
  1385. 		
  1386. 		const apply2DFrame = (points, lines) => {
  1387. 			const {x, y} = this;
  1388. 			
  1389. 			if (Math.abs(lines.right.c) === Infinity) {
  1390. 				this.x = Math.min(points.topRight.x, Math.max(points.topLeft.x, this.x));
  1391. 			} else if (isRight(lines.right)) {
  1392. 				if (correctX(lines.right, points.bottomRight, points.topRight)) {
  1393. 					return;
  1394. 				}
  1395. 			} else if (!isRight(lines.left)) {
  1396. 				if (correctX(lines.left, points.bottomLeft, points.topLeft)) {
  1397. 					return;
  1398. 				}
  1399. 			}
  1400. 			
  1401. 			if (isAbove(lines.top)) {
  1402. 				if (correctY(lines.top, points.topLeft, points.topRight)) {
  1403. 					return;
  1404. 				}
  1405. 			} else if (!isAbove(lines.bottom)) {
  1406. 				if (correctY(lines.bottom, points.bottomLeft, points.bottomRight)) {
  1407. 					return;
  1408. 				}
  1409. 			}
  1410. 			
  1411. 			if (x <= points.bottomLeft.x && y <= points.bottomLeft.y) {
  1412. 				this.x = points.bottomLeft.x;
  1413. 				this.y = points.bottomLeft.y;
  1414. 			} else if (x >= points.bottomRight.x && y <= points.bottomRight.y) {
  1415. 				this.x = points.bottomRight.x;
  1416. 				this.y = points.bottomRight.y;
  1417. 			} else if (x <= points.topLeft.x && y >= points.topLeft.y) {
  1418. 				this.x = points.topLeft.x;
  1419. 				this.y = points.topLeft.y;
  1420. 			} else if (x >= points.topRight.x && y >= points.topRight.y) {
  1421. 				this.x = points.topRight.x;
  1422. 				this.y = points.topRight.y;
  1423. 			}
  1424. 		};
  1425. 		
  1426. 		const apply1DSideFrame = {
  1427. 			x: (line) => {
  1428. 				this.x = Math.max(-line.x, Math.min(line.x, this.x));
  1429. 				
  1430. 				this.y = getLineY(line);
  1431. 			},
  1432. 			y: (line) => {
  1433. 				this.y = Math.max(-line.y, Math.min(line.y, this.y));
  1434. 				
  1435. 				this.x = getLineX(line);
  1436. 			},
  1437. 		};
  1438. 		
  1439. 		const swap = (array, i0, i1) => {
  1440. 			const temp = array[i0];
  1441. 			
  1442. 			array[i0] = array[i1];
  1443. 			array[i1] = temp;
  1444. 		};
  1445. 		
  1446. 		const getBoundApplyFrame = (() => {
  1447. 			const getBound = (first, second, isTopLeft) => {
  1448. 				if (zoom.value <= first.z) {
  1449. 					return false;
  1450. 				}
  1451. 				
  1452. 				if (zoom.value >= second.z) {
  1453. 					const progress = zoom.value / second.z;
  1454. 					
  1455. 					const x = isTopLeft ?
  1456. 						-0.5 - (-0.5 - second.x) / progress :
  1457. 						0.5 - (0.5 - second.x) / progress;
  1458. 					
  1459. 					return {
  1460. 						x,
  1461. 						y: 0.5 - (0.5 - second.y) / progress,
  1462. 					};
  1463. 				}
  1464. 				
  1465. 				return {
  1466. 					...getProgressed(first, second.vpEnd, zoom.value),
  1467. 					axis: second.vpEnd.axis,
  1468. 					m: second.y / second.x,
  1469. 					c: 0,
  1470. 				};
  1471. 			};
  1472. 			
  1473. 			const getFrame = (point0, point1) => {
  1474. 				const points = {};
  1475. 				const lines = {};
  1476. 				
  1477. 				const flipped0 = getFlipped(point0);
  1478. 				const flipped1 = getFlipped(point1);
  1479. 				
  1480. 				const m0 = getM(point0, point1);
  1481. 				const m1 = getM(flipped0, point1);
  1482. 				
  1483. 				lines.top = getLine(m0, point0);
  1484. 				lines.bottom = getLine(m0, flipped0);
  1485. 				
  1486. 				lines.left = getLine(m1, point0);
  1487. 				lines.right = getLine(m1, flipped0);
  1488. 				
  1489. 				points.topLeft = point0;
  1490. 				points.topRight = point1;
  1491. 				points.bottomLeft = flipped1;
  1492. 				points.bottomRight = flipped0;
  1493. 				
  1494. 				if (video.clientWidth < video.clientHeight) {
  1495. 					if (getLineX(lines.right, 0) < getLineX(lines.left, 0)) {
  1496. 						swap(lines, 'right', 'left');
  1497. 						
  1498. 						swap(points, 'bottomLeft', 'bottomRight');
  1499. 						swap(points, 'topLeft', 'topRight');
  1500. 					}
  1501. 				} else {
  1502. 					if (lines.top.c < lines.bottom.c) {
  1503. 						swap(lines, 'top', 'bottom');
  1504. 						
  1505. 						swap(points, 'topLeft', 'bottomLeft');
  1506. 						swap(points, 'topRight', 'bottomRight');
  1507. 					}
  1508. 				}
  1509. 				
  1510. 				return [points, lines];
  1511. 			};
  1512. 			
  1513. 			return (first0, second0, first1, second1) => {
  1514. 				const point0 = getBound(first0, second0, true);
  1515. 				const point1 = getBound(first1, second1, false);
  1516. 				
  1517. 				if (!point0 && !point1) {
  1518. 					return () => {
  1519. 						this.x = this.y = 0;
  1520. 					};
  1521. 				}
  1522. 				
  1523. 				if (!point0 || !point1 || point0.axis && point0.axis === point1.axis) {
  1524. 					// todo choose the longer line?
  1525. 					const point = point0 || point1;
  1526. 					const {axis} = point;
  1527. 					
  1528. 					point.axis ??= Math.abs(point.x) > Math.abs(point.y) ? 'x' : 'y';
  1529. 					
  1530. 					if (point[point.axis] < 0) {
  1531. 						point.x = -point.x;
  1532. 						point.y = -point.y;
  1533. 					}
  1534. 					
  1535. 					if (!axis) {
  1536. 						point.m = point.y / point.x;
  1537. 						
  1538. 						point.c = 0;
  1539. 					}
  1540. 					
  1541. 					return apply1DSideFrame[point.axis].bind(null, point);
  1542. 				}
  1543. 				
  1544. 				return apply2DFrame.bind(null, ...getFrame(point0, point1));
  1545. 			};
  1546. 		})();
  1547. 		
  1548. 		const snapZoom = (() => {
  1549. 			const getDirected = (first, second, flipX, flipY) => {
  1550. 				const line0 = [first, {}];
  1551. 				const line1 = [{z: second.z}, {}];
  1552. 				
  1553. 				if (flipX) {
  1554. 					line0[1].x = -second.vpEnd.x;
  1555. 					line1[0].x = -second.x;
  1556. 					line1[1].x = -0.5;
  1557. 				} else {
  1558. 					line0[1].x = second.vpEnd.x;
  1559. 					line1[0].x = second.x;
  1560. 					line1[1].x = 0.5;
  1561. 				}
  1562. 				
  1563. 				if (flipY) {
  1564. 					line0[1].y = -second.vpEnd.y;
  1565. 					line1[0].y = -second.y;
  1566. 					line1[1].y = -0.5;
  1567. 				} else {
  1568. 					line0[1].y = second.vpEnd.y;
  1569. 					line1[0].y = second.y;
  1570. 					line1[1].y = 0.5;
  1571. 				}
  1572. 				
  1573. 				return [line0, line1];
  1574. 			};
  1575. 			
  1576. 			// https://math.stackexchange.com/questions/2223691/intersect-2-lines-at-the-same-ratio-through-a-point
  1577. 			const getIntersectProgress = ({x, y}, [{x: g, y: e}, {x: f, y: d}], [{x: k, y: i}, {x: j, y: h}], doFlip) => {
  1578. 				const a = d * j - d * k - j * e + e * k - h * f + h * g + i * f - i * g;
  1579. 				const b = d * k - d * x - e * k + e * x + j * e - k * e - j * y + k * y - h * g + h * x + i * g - i * x - f * i + g * i + f * y - g * y;
  1580. 				const c = k * e - e * x - k * y - g * i + i * x + g * y;
  1581. 				
  1582. 				return (doFlip ? -b - Math.sqrt(b * b - 4 * a * c) : -b + Math.sqrt(b * b - 4 * a * c)) / (2 * a);
  1583. 			};
  1584. 			
  1585. 			const getLineFromPoints = (from, to) => getLine(getM(from, to), from);
  1586. 			
  1587. 			// line with progressed start point
  1588. 			const getProgressedLine = (line, {z}) => [getProgressed(...line, z), line[1]];
  1589. 			
  1590. 			return (first0, _second0, first1, second1) => {
  1591. 				const second0 = {..._second0, x: -_second0.x, vpEnd: {..._second0.vpEnd, x: -_second0.vpEnd.x}};
  1592. 				
  1593. 				const absPosition = {x: Math.abs(this.x), y: Math.abs(this.y)};
  1594. 				
  1595. 				const getPairings = (flipX0, flipY0, flipX1, flipY1) => {
  1596. 					const [lineFirst0, lineSecond0] = getDirected(first0, second0, flipX0, flipY0);
  1597. 					const [lineFirst1, lineSecond1] = getDirected(first1, second1, flipX1, flipY1);
  1598. 					
  1599. 					// array structure is:
  1600. 					// start zoom for both lines
  1601. 					// 0 line start and its infinite zoom point
  1602. 					// 1 line start and its infinite zoom point
  1603. 					
  1604. 					return [
  1605. 						first0.z >= first1.z ?
  1606. 							[first0.z, lineFirst0, getProgressedLine(lineFirst1, first0)] :
  1607. 							[first1.z, getProgressedLine(lineFirst0, first1), lineFirst1],
  1608. 						
  1609. 						...second0.z >= second1.z ?
  1610. 							[
  1611. 								[second1.z, getProgressedLine(lineFirst0, second1), lineSecond1],
  1612. 								[second0.z, lineSecond0, getProgressedLine(lineSecond1, second0)],
  1613. 							] :
  1614. 							[
  1615. 								[second0.z, lineSecond0, getProgressedLine(lineFirst1, second0)],
  1616. 								[second1.z, getProgressedLine(lineSecond0, second1), lineSecond1],
  1617. 							],
  1618. 					];
  1619. 				};
  1620. 				
  1621. 				const [pair0, pair1, pair2, doFlip = false] = (() => {
  1622. 					if (this.x >= 0 !== this.y >= 0) {
  1623. 						return isAbove(getLineFromPoints(second0, {x: 0.5, y: 0.5}), absPosition) ?
  1624. 							[...getPairings(false, false, true, false), true] :
  1625. 							getPairings(false, false, false, true);
  1626. 					}
  1627. 					
  1628. 					return isAbove(getLineFromPoints(second1, {x: 0.5, y: 0.5}), absPosition) ?
  1629. 						getPairings(true, false, false, false) :
  1630. 						[...getPairings(false, true, false, false), true];
  1631. 				})();
  1632. 				
  1633. 				const applyZoomPairSecond = ([z, ...pair], maxP = 1) => {
  1634. 					const p = getIntersectProgress(absPosition, ...pair, doFlip);
  1635. 					
  1636. 					if (p >= 0 && p <= maxP) {
  1637. 						// I don't think the >= 1 check is necessary but best be safe
  1638. 						zoom.value = p >= 1 ? Number.MAX_SAFE_INTEGER : z / (1 - p);
  1639. 						
  1640. 						return true;
  1641. 					}
  1642. 					
  1643. 					return false;
  1644. 				};
  1645. 				
  1646. 				if (
  1647. 					applyZoomPairSecond(pair2)
  1648. 					|| applyZoomPairSecond(pair1, getProgress(pair1[0], pair2[0]))
  1649. 					|| applyZoomPairSecond(pair0, getProgress(pair0[0], pair1[0]))
  1650. 				) {
  1651. 					return;
  1652. 				}
  1653. 				
  1654. 				zoom.value = pair0[0];
  1655. 			};
  1656. 		})();
  1657. 		
  1658. 		const getZoomPoints = (() => {
  1659. 			const getPoints = (fitZoom, doFlip) => {
  1660. 				const getGenericRotated = (x, y, angle) => {
  1661. 					const radius = Math.sqrt(x * x + y * y);
  1662. 					const pointTheta = getTheta(0, 0, x, y) + angle;
  1663. 					
  1664. 					return {
  1665. 						x: radius * Math.cos(pointTheta),
  1666. 						y: radius * Math.sin(pointTheta),
  1667. 					};
  1668. 				};
  1669. 				
  1670. 				const getRotated = (xRaw, yRaw) => {
  1671. 					// Multiplying by video dimensions to have the axes' scales match the video's
  1672. 					// Using midPoint's raw values would only work if points moved elliptically around the centre of rotation
  1673. 					const rotated = getGenericRotated(xRaw * video.clientWidth, yRaw * video.clientHeight, (DEGREES[90] - rotation.value) % DEGREES[180]);
  1674. 					
  1675. 					rotated.x /= video.clientWidth;
  1676. 					rotated.y /= video.clientHeight;
  1677. 					
  1678. 					return rotated;
  1679. 				};
  1680. 				
  1681. 				return [
  1682. 					{...getRotated(halfDimensions.viewport.width / video.clientWidth / fitZoom[0], 0), axis: doFlip ? 'y' : 'x'},
  1683. 					{...getRotated(0, halfDimensions.viewport.height / video.clientHeight / fitZoom[1]), axis: doFlip ? 'x' : 'y'},
  1684. 				];
  1685. 			};
  1686. 			
  1687. 			const getIntersection = (line, corner, middle) => {
  1688. 				const getIntersection = (line0, line1) => {
  1689. 					const a0 = line0[0].y - line0[1].y;
  1690. 					const b0 = line0[1].x - line0[0].x;
  1691. 					const c0 = line0[1].x * line0[0].y - line0[0].x * line0[1].y;
  1692. 					
  1693. 					const a1 = line1[0].y - line1[1].y;
  1694. 					const b1 = line1[1].x - line1[0].x;
  1695. 					const c1 = line1[1].x * line1[0].y - line1[0].x * line1[1].y;
  1696. 					
  1697. 					const d = a0 * b1 - b0 * a1;
  1698. 					
  1699. 					return {
  1700. 						x: (c0 * b1 - b0 * c1) / d,
  1701. 						y: (a0 * c1 - c0 * a1) / d,
  1702. 					};
  1703. 				};
  1704. 				
  1705. 				const {x, y} = getIntersection([{x: 0, y: 0}, middle], [line, corner]);
  1706. 				const progress = isThin ? (y - line.y) / (corner.y - line.y) : (x - line.x) / (corner.x - line.x);
  1707. 				
  1708. 				return {x, y, z: line.z / (1 - progress), c: line.y};
  1709. 			};
  1710. 			
  1711. 			const getIntersect = (yIntersect, corner, right, top) => {
  1712. 				const point0 = getIntersection(yIntersect, corner, right);
  1713. 				const point1 = getIntersection(yIntersect, corner, top);
  1714. 				
  1715. 				const [point, vpEnd] = point0.z > point1.z ? [point0, {...right}] : [point1, {...top}];
  1716. 				
  1717. 				if (Math.sign(point[vpEnd.axis]) !== Math.sign(vpEnd[vpEnd.axis])) {
  1718. 					vpEnd.x = -vpEnd.x;
  1719. 					vpEnd.y = -vpEnd.y;
  1720. 				}
  1721. 				
  1722. 				return {...point, vpEnd};
  1723. 			};
  1724. 			
  1725. 			// the angle from 0,0 to the center of the video edge angled towards the viewport's upper-right corner
  1726. 			const getQuadrantAngle = (isEvenQuadrant) => {
  1727. 				const angle = (rotation.value + DEGREES[360]) % DEGREES[90];
  1728. 				
  1729. 				return isEvenQuadrant ? angle : DEGREES[90] - angle;
  1730. 			};
  1731. 			
  1732. 			return () => {
  1733. 				const isEvenQuadrant = (Math.floor(rotation.value / DEGREES[90]) + 3) % 2 === 0;
  1734. 				const quadrantAngle = getQuadrantAngle(isEvenQuadrant);
  1735. 				
  1736. 				const progress = quadrantAngle / DEGREES[90] * -2 + 1;
  1737. 				const progressAngles = {
  1738. 					base: Math.atan(progress * viewportRatio),
  1739. 					side: Math.atan(progress * viewportRatioInverse),
  1740. 				};
  1741. 				const progressCosines = {
  1742. 					base: Math.cos(progressAngles.base),
  1743. 					side: Math.cos(progressAngles.side),
  1744. 				};
  1745. 				
  1746. 				const fitZoom = zoom.getVideoFit(true);
  1747. 				const points = getPoints(fitZoom, quadrantAngle >= DEGREES[45]);
  1748. 				
  1749. 				const sideIntersection = getIntersect(
  1750. 					((cornerAngle) => ({
  1751. 						x: 0,
  1752. 						y: (halfDimensions.video.height - halfDimensions.video.width * Math.tan(cornerAngle)) / video.clientHeight,
  1753. 						z: halfDimensions.viewport.width / (progressCosines.side * Math.abs(halfDimensions.video.width / Math.cos(cornerAngle))),
  1754. 					}))(quadrantAngle + progressAngles.side),
  1755. 					isEvenQuadrant ? {x: -0.5, y: 0.5} : {x: 0.5, y: 0.5},
  1756. 					...points,
  1757. 				);
  1758. 				
  1759. 				const baseIntersection = getIntersect(
  1760. 					((cornerAngle) => ({
  1761. 						x: 0,
  1762. 						y: (halfDimensions.video.height - halfDimensions.video.width * Math.tan(cornerAngle)) / video.clientHeight,
  1763. 						z: halfDimensions.viewport.height / (progressCosines.base * Math.abs(halfDimensions.video.width / Math.cos(cornerAngle))),
  1764. 					}))(DEGREES[90] - quadrantAngle - progressAngles.base),
  1765. 					isEvenQuadrant ? {x: 0.5, y: 0.5} : {x: -0.5, y: 0.5},
  1766. 					...points,
  1767. 				);
  1768. 				
  1769. 				const [originSide, originBase] = fitZoom.map((z) => ({x: 0, y: 0, z}));
  1770. 				
  1771. 				return isEvenQuadrant ?
  1772. 					[...[originSide, sideIntersection], ...[originBase, baseIntersection]] :
  1773. 					[...[originBase, baseIntersection], ...[originSide, sideIntersection]];
  1774. 			};
  1775. 		})();
  1776. 		
  1777. 		let zoomPoints;
  1778. 		
  1779. 		const getEnsureZoomPoints = (() => {
  1780. 			const updateLog = [];
  1781. 			let count = 0;
  1782. 			
  1783. 			return () => {
  1784. 				const zoomPointCache = new DimensionCache(rotation);
  1785. 				const callbackCache = new Cache(zoom);
  1786. 				const id = count++;
  1787. 				
  1788. 				return () => {
  1789. 					if (zoomPointCache.isStale()) {
  1790. 						updateLog.length = 0;
  1791. 						
  1792. 						zoomPoints = getZoomPoints();
  1793. 					}
  1794. 					
  1795. 					if (callbackCache.isStale() || !updateLog[id]) {
  1796. 						updateLog[id] = true;
  1797. 						
  1798. 						return true;
  1799. 					}
  1800. 					
  1801. 					return false;
  1802. 				};
  1803. 			};
  1804. 		})();
  1805. 		
  1806. 		const handlers = {
  1807. 			[LIMITS.static]: ({custom: ratio}) => {
  1808. 				const bound = 0.5 + (ratio - 0.5) / zoom.value;
  1809. 				
  1810. 				this.x = Math.max(-bound, Math.min(bound, this.x));
  1811. 				this.y = Math.max(-bound, Math.min(bound, this.y));
  1812. 			},
  1813. 			[LIMITS.fit]: (() => {
  1814. 				let boundApplyFrame;
  1815. 				
  1816. 				const ensure = getEnsureZoomPoints();
  1817. 				
  1818. 				return () => {
  1819. 					if (ensure()) {
  1820. 						boundApplyFrame = getBoundApplyFrame(...zoomPoints);
  1821. 					}
  1822. 					
  1823. 					boundApplyFrame();
  1824. 				};
  1825. 			})(),
  1826. 		};
  1827. 		
  1828. 		const snapHandlers = {
  1829. 			[LIMITS.fit]: (() => {
  1830. 				const ensure = getEnsureZoomPoints();
  1831. 				
  1832. 				return () => {
  1833. 					ensure();
  1834. 					
  1835. 					snapZoom(...zoomPoints);
  1836. 					
  1837. 					zoom.constrain();
  1838. 				};
  1839. 			})(),
  1840. 		};
  1841. 		
  1842. 		return (doZoom = false) => {
  1843. 			const {panLimit, snapPanLimit} = $config.get();
  1844. 			
  1845. 			if (doZoom) {
  1846. 				snapHandlers[snapPanLimit.type]?.();
  1847. 			}
  1848. 			
  1849. 			handlers[panLimit.type]?.(panLimit);
  1850. 			
  1851. 			this.apply();
  1852. 		};
  1853. 	})();
  1854. }();
  1855.  
  1856. const crop = new function () {
  1857. 	this.top = this.right = this.bottom = this.left = 0;
  1858. 	
  1859. 	this.getValues = () => ({top: this.top, right: this.right, bottom: this.bottom, left: this.left});
  1860. 	
  1861. 	this.reveal = () => {
  1862. 		this.top = this.right = this.bottom = this.left = 0;
  1863. 		
  1864. 		rule.remove();
  1865. 	};
  1866. 	
  1867. 	this.reset = () => {
  1868. 		this.reveal();
  1869. 		
  1870. 		actions.crop.reset();
  1871. 	};
  1872. 	
  1873. 	const rule = new css.Toggleable();
  1874. 	
  1875. 	this.apply = () => {
  1876. 		rule.remove();
  1877. 		rule.add(
  1878. 			`${SELECTOR_VIDEO}:not(.${this.CLASS_ABLE} *)`,
  1879. 			['clip-path', `inset(${this.top * 100}% ${this.right * 100}% ${this.bottom * 100}% ${this.left * 100}%)`],
  1880. 		);
  1881. 		
  1882. 		delete actions.reset.restore;
  1883. 		
  1884. 		glow.handleViewChange();
  1885. 		glow.reset();
  1886. 	};
  1887. 	
  1888. 	this.getDimensions = (width = video.clientWidth, height = video.clientHeight) => [
  1889. 		width * (1 - this.left - this.right),
  1890. 		height * (1 - this.top - this.bottom),
  1891. 	];
  1892. }();
  1893.  
  1894. // FUNCTIONALITY
  1895.  
  1896. const glow = (() => {
  1897. 	const videoCanvas = new OffscreenCanvas(0, 0);
  1898. 	const videoCtx = videoCanvas.getContext('2d', {alpha: false});
  1899. 	
  1900. 	const glowCanvas = document.createElement('canvas');
  1901. 	const glowCtx = glowCanvas.getContext('2d', {alpha: false});
  1902. 	
  1903. 	glowCanvas.style.setProperty('position', 'absolute');
  1904. 	
  1905. 	class Sector {
  1906. 		canvas = new OffscreenCanvas(0, 0);
  1907. 		ctx = this.canvas.getContext('2d', {alpha: false});
  1908. 		
  1909. 		update(doFill) {
  1910. 			if (doFill) {
  1911. 				this.fill();
  1912. 			} else {
  1913. 				this.shift();
  1914. 				this.take();
  1915. 			}
  1916. 			
  1917. 			this.giveEdge();
  1918. 			
  1919. 			if (this.hasCorners) {
  1920. 				this.giveCorners();
  1921. 			}
  1922. 		}
  1923. 	}
  1924. 	
  1925. 	class Side extends Sector {
  1926. 		setDimensions(doShiftRight, sWidth, sHeight, sx, sy, dx, dy, dWidth, dHeight) {
  1927. 			this.canvas.width = sWidth;
  1928. 			this.canvas.height = sHeight;
  1929. 			
  1930. 			this.shift = this.ctx.drawImage.bind(this.ctx, this.canvas, doShiftRight ? 1 : -1, 0);
  1931. 			
  1932. 			this.fill = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, 1, sHeight, 0, 0, sWidth, sHeight);
  1933. 			this.take = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, 1, sHeight, doShiftRight ? 0 : sWidth - 1, 0, 1, sHeight);
  1934. 			
  1935. 			this.giveEdge = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, sWidth, sHeight, dx, dy, dWidth, dHeight);
  1936. 			
  1937. 			if (dy === 0) {
  1938. 				this.hasCorners = false;
  1939. 				
  1940. 				return;
  1941. 			}
  1942. 			
  1943. 			this.hasCorners = true;
  1944. 			
  1945. 			const giveCorner0 = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, sWidth, 1, dx, 0, dWidth, dy);
  1946. 			const giveCorner1 = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, sHeight - 1, sWidth, 1, dx, dy + dHeight, dWidth, dy);
  1947. 			
  1948. 			this.giveCorners = () => {
  1949. 				giveCorner0();
  1950. 				giveCorner1();
  1951. 			};
  1952. 		}
  1953. 	}
  1954. 	
  1955. 	class Base extends Sector {
  1956. 		setDimensions(doShiftDown, sWidth, sHeight, sx, sy, dx, dy, dWidth, dHeight) {
  1957. 			this.canvas.width = sWidth;
  1958. 			this.canvas.height = sHeight;
  1959. 			
  1960. 			this.shift = this.ctx.drawImage.bind(this.ctx, this.canvas, 0, doShiftDown ? 1 : -1);
  1961. 			
  1962. 			this.fill = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, sWidth, 1, 0, 0, sWidth, sHeight);
  1963. 			this.take = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, sWidth, 1, 0, doShiftDown ? 0 : sHeight - 1, sWidth, 1);
  1964. 			
  1965. 			this.giveEdge = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, sWidth, sHeight, dx, dy, dWidth, dHeight);
  1966. 			
  1967. 			if (dx === 0) {
  1968. 				this.hasCorners = false;
  1969. 				
  1970. 				return;
  1971. 			}
  1972. 			
  1973. 			this.hasCorners = true;
  1974. 			
  1975. 			const giveCorner0 = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, 1, sHeight, 0, dy, dx, dHeight);
  1976. 			const giveCorner1 = glowCtx.drawImage.bind(glowCtx, this.canvas, sWidth - 1, 0, 1, sHeight, dx + dWidth, dy, dx, dHeight);
  1977. 			
  1978. 			this.giveCorners = () => {
  1979. 				giveCorner0();
  1980. 				giveCorner1();
  1981. 			};
  1982. 		}
  1983. 		
  1984. 		setClipPath(points) {
  1985. 			this.clipPath = new Path2D();
  1986. 			
  1987. 			this.clipPath.moveTo(...points[0]);
  1988. 			this.clipPath.lineTo(...points[1]);
  1989. 			this.clipPath.lineTo(...points[2]);
  1990. 			this.clipPath.closePath();
  1991. 		}
  1992. 		
  1993. 		update(doFill) {
  1994. 			glowCtx.save();
  1995. 			
  1996. 			glowCtx.clip(this.clipPath);
  1997. 			
  1998. 			super.update(doFill);
  1999. 			
  2000. 			glowCtx.restore();
  2001. 		}
  2002. 	}
  2003. 	
  2004. 	const components = {
  2005. 		left: new Side(),
  2006. 		right: new Side(),
  2007. 		top: new Base(),
  2008. 		bottom: new Base(),
  2009. 	};
  2010. 	
  2011. 	const setComponentDimensions = (sampleCount, size, isInset, doFlip) => {
  2012. 		const [croppedWidth, croppedHeight] = crop.getDimensions();
  2013. 		const halfCanvas = {x: Math.ceil(glowCanvas.width / 2), y: Math.ceil(glowCanvas.height / 2)};
  2014. 		const halfVideo = {x: croppedWidth / 2, y: croppedHeight / 2};
  2015. 		const dWidth = Math.ceil(Math.min(halfVideo.x, size));
  2016. 		const dHeight = Math.ceil(Math.min(halfVideo.y, size));
  2017. 		const [dWidthScale, dHeightScale, sideWidth, sideHeight] = isInset ?
  2018. 			[0, 0, videoCanvas.width / croppedWidth * glowCanvas.width, videoCanvas.height / croppedHeight * glowCanvas.height] :
  2019. 			[halfCanvas.x - halfVideo.x, halfCanvas.y - halfVideo.y, croppedWidth, croppedHeight];
  2020. 		
  2021. 		components.left.setDimensions(!doFlip, sampleCount, videoCanvas.height, 0, 0, 0, dHeightScale, dWidth, sideHeight);
  2022. 		
  2023. 		components.right.setDimensions(doFlip, sampleCount, videoCanvas.height, videoCanvas.width - 1, 0, glowCanvas.width - dWidth, dHeightScale, dWidth, sideHeight);
  2024. 		
  2025. 		components.top.setDimensions(!doFlip, videoCanvas.width, sampleCount, 0, 0, dWidthScale, 0, sideWidth, dHeight);
  2026. 		components.top.setClipPath([[0, 0], [halfCanvas.x, halfCanvas.y], [glowCanvas.width, 0]]);
  2027. 		
  2028. 		components.bottom.setDimensions(doFlip, videoCanvas.width, sampleCount, 0, videoCanvas.height - 1, dWidthScale, glowCanvas.height - dHeight, sideWidth, dHeight);
  2029. 		components.bottom.setClipPath([[0, glowCanvas.height], [halfCanvas.x, halfCanvas.y], [glowCanvas.width, glowCanvas.height]]);
  2030. 	};
  2031. 	
  2032. 	class Instance {
  2033. 		constructor() {
  2034. 			const {filter, sampleCount, size, end, doFlip} = $config.get().glow;
  2035. 			
  2036. 			// Setup canvases
  2037. 			
  2038. 			glowCanvas.style.setProperty('filter', filter);
  2039. 			
  2040. 			[glowCanvas.width, glowCanvas.height] = crop.getDimensions().map((dimension) => dimension * end);
  2041. 			
  2042. 			glowCanvas.style.setProperty('left', `${crop.left * 100 + (1 - end) * (1 - crop.left - crop.right) * 50}%`);
  2043. 			glowCanvas.style.setProperty('top', `${crop.top * 100 + (1 - end) * (1 - crop.top - crop.bottom) * 50}%`);
  2044. 			
  2045. 			[videoCanvas.width, videoCanvas.height] = crop.getDimensions(video.videoWidth, video.videoHeight);
  2046. 			
  2047. 			setComponentDimensions(sampleCount, size, end <= 1, doFlip);
  2048. 			
  2049. 			this.update(true);
  2050. 		}
  2051. 		
  2052. 		update(doFill = false) {
  2053. 			videoCtx.drawImage(
  2054. 				video,
  2055. 				crop.left * video.videoWidth,
  2056. 				crop.top * video.videoHeight,
  2057. 				video.videoWidth * (1 - crop.left - crop.right),
  2058. 				video.videoHeight * (1 - crop.top - crop.bottom),
  2059. 				0,
  2060. 				0,
  2061. 				videoCanvas.width,
  2062. 				videoCanvas.height,
  2063. 			);
  2064. 			
  2065. 			components.left.update(doFill);
  2066. 			components.right.update(doFill);
  2067. 			components.top.update(doFill);
  2068. 			components.bottom.update(doFill);
  2069. 		}
  2070. 	}
  2071. 	
  2072. 	return new function () {
  2073. 		const container = document.createElement('div');
  2074. 		
  2075. 		container.style.display = 'none';
  2076. 		
  2077. 		container.appendChild(glowCanvas);
  2078. 		containers.background.appendChild(container);
  2079. 		
  2080. 		this.isHidden = false;
  2081. 		
  2082. 		let instance, startCopyLoop, stopCopyLoop;
  2083. 		
  2084. 		const play = () => {
  2085. 			if (!video.paused && !this.isHidden && !enabler.isHidingGlow) {
  2086. 				startCopyLoop?.();
  2087. 			}
  2088. 		};
  2089. 		
  2090. 		const fill = () => {
  2091. 			if (!this.isHidden) {
  2092. 				instance.update(true);
  2093. 			}
  2094. 		};
  2095. 		
  2096. 		const handleVisibilityChange = () => {
  2097. 			if (document.hidden) {
  2098. 				stopCopyLoop();
  2099. 			} else {
  2100. 				play();
  2101. 			}
  2102. 		};
  2103. 		
  2104. 		this.handleSizeChange = () => {
  2105. 			instance = new Instance();
  2106. 		};
  2107. 		
  2108. 		// set up pausing if glow isn't visible
  2109. 		this.handleViewChange = (() => {
  2110. 			const cache = new Cache(rotation, zoom);
  2111. 			
  2112. 			let corners;
  2113. 			
  2114. 			return (doForce = false) => {
  2115. 				if (doForce || cache.isStale()) {
  2116. 					corners = getRotatedCorners(halfDimensions.viewport.width / zoom.value, halfDimensions.viewport.height / zoom.value);
  2117. 				}
  2118. 				
  2119. 				const videoX = position.x * video.clientWidth;
  2120. 				const videoY = position.y * video.clientHeight;
  2121. 				
  2122. 				for (const corner of corners) {
  2123. 					if (
  2124. 						// unpause if the viewport extends more than 1 pixel beyond a video edge
  2125. 						videoX + corner.x > (0.5 - crop.right) * video.clientWidth + 1
  2126. 						|| videoX - corner.x < (crop.left - 0.5) * video.clientWidth - 1
  2127. 						|| videoY + corner.y > (0.5 - crop.top) * video.clientHeight + 1
  2128. 						|| videoY - corner.y < (crop.bottom - 0.5) * video.clientHeight - 1
  2129. 					) {
  2130. 						// fill if newly visible
  2131. 						if (this.isHidden) {
  2132. 							instance?.update(true);
  2133. 						}
  2134. 						
  2135. 						this.isHidden = false;
  2136. 						
  2137. 						glowCanvas.style.removeProperty('visibility');
  2138. 						
  2139. 						play();
  2140. 						
  2141. 						return;
  2142. 					}
  2143. 				}
  2144. 				
  2145. 				this.isHidden = true;
  2146. 				
  2147. 				glowCanvas.style.visibility = 'hidden';
  2148. 				
  2149. 				stopCopyLoop?.();
  2150. 			};
  2151. 		})();
  2152. 		
  2153. 		const loop = {};
  2154. 		
  2155. 		this.start = () => {
  2156. 			const config = $config.get().glow;
  2157. 			
  2158. 			if (!config) {
  2159. 				return;
  2160. 			}
  2161. 			
  2162. 			if (!enabler.isHidingGlow) {
  2163. 				container.style.removeProperty('display');
  2164. 			}
  2165. 			
  2166. 			// todo handle this?
  2167. 			if (crop.left + crop.right >= 1 || crop.top + crop.bottom >= 1) {
  2168. 				return;
  2169. 			}
  2170. 			
  2171. 			let loopId = -1;
  2172. 			
  2173. 			if (loop.interval !== config.interval || loop.fps !== config.fps) {
  2174. 				loop.interval = config.interval;
  2175. 				loop.fps = config.fps;
  2176. 				loop.wasSlow = false;
  2177. 				loop.throttleCount = 0;
  2178. 			}
  2179. 			
  2180. 			stopCopyLoop = () => ++loopId;
  2181. 			
  2182. 			instance = new Instance();
  2183. 			
  2184. 			startCopyLoop = async () => {
  2185. 				const id = ++loopId;
  2186. 				
  2187. 				await new Promise((resolve) => {
  2188. 					window.setTimeout(resolve, config.interval);
  2189. 				});
  2190. 				
  2191. 				while (id === loopId) {
  2192. 					const startTime = Date.now();
  2193. 					
  2194. 					instance.update();
  2195. 					
  2196. 					const delay = loop.interval - (Date.now() - startTime);
  2197. 					
  2198. 					if (delay <= 0) {
  2199. 						if (loop.wasSlow) {
  2200. 							loop.interval = 1000 / (loop.fps - ++loop.throttleCount);
  2201. 						}
  2202. 						
  2203. 						loop.wasSlow = !loop.wasSlow;
  2204. 						
  2205. 						continue;
  2206. 					}
  2207. 					
  2208. 					if (delay > 2 && loop.throttleCount > 0) {
  2209. 						console.warn(`[${GM.info.script.name}] Glow update frequency reduced from ${loop.fps} hertz to ${loop.fps - loop.throttleCount} hertz due to poor performance.`);
  2210. 						
  2211. 						loop.fps -= loop.throttleCount;
  2212. 						
  2213. 						loop.throttleCount = 0;
  2214. 					}
  2215. 					
  2216. 					loop.wasSlow = false;
  2217. 					
  2218. 					await new Promise((resolve) => {
  2219. 						window.setTimeout(resolve, delay);
  2220. 					});
  2221. 				}
  2222. 			};
  2223. 			
  2224. 			play();
  2225. 			
  2226. 			video.addEventListener('pause', stopCopyLoop);
  2227. 			video.addEventListener('play', play);
  2228. 			video.addEventListener('seeked', fill);
  2229. 			
  2230. 			document.addEventListener('visibilitychange', handleVisibilityChange);
  2231. 		};
  2232. 		
  2233. 		const priorCrop = {};
  2234. 		
  2235. 		this.hide = () => {
  2236. 			Object.assign(priorCrop, crop);
  2237. 			
  2238. 			stopCopyLoop?.();
  2239. 			
  2240. 			container.style.display = 'none';
  2241. 		};
  2242. 		
  2243. 		this.show = () => {
  2244. 			if (Object.entries(priorCrop).some(([edge, value]) => crop[edge] !== value)) {
  2245. 				this.reset();
  2246. 			} else {
  2247. 				play();
  2248. 			}
  2249. 			
  2250. 			container.style.removeProperty('display');
  2251. 		};
  2252. 		
  2253. 		this.stop = () => {
  2254. 			this.hide();
  2255. 			
  2256. 			video.removeEventListener('pause', stopCopyLoop);
  2257. 			video.removeEventListener('play', play);
  2258. 			video.removeEventListener('seeked', fill);
  2259. 			
  2260. 			document.removeEventListener('visibilitychange', handleVisibilityChange);
  2261. 			
  2262. 			startCopyLoop = undefined;
  2263. 			stopCopyLoop = undefined;
  2264. 		};
  2265. 		
  2266. 		this.reset = () => {
  2267. 			this.stop();
  2268. 			
  2269. 			this.start();
  2270. 		};
  2271. 	}();
  2272. })();
  2273.  
  2274. const peek = (stop = false) => {
  2275. 	const prior = {
  2276. 		zoom: zoom.value,
  2277. 		rotation: rotation.value,
  2278. 		crop: crop.getValues(),
  2279. 		position: position.getValues(),
  2280. 	};
  2281. 	
  2282. 	position.reset();
  2283. 	rotation.reset();
  2284. 	zoom.reset();
  2285. 	crop.reset();
  2286. 	
  2287. 	glow[stop ? 'stop' : 'reset']();
  2288. 	
  2289. 	return () => {
  2290. 		zoom.value = prior.zoom;
  2291. 		rotation.value = prior.rotation;
  2292. 		Object.assign(position, prior.position);
  2293. 		Object.assign(crop, prior.crop);
  2294. 		
  2295. 		actions.crop.set(prior.crop);
  2296. 		
  2297. 		position.apply();
  2298. 		rotation.apply();
  2299. 		zoom.apply();
  2300. 		crop.apply();
  2301. 	};
  2302. };
  2303.  
  2304. const actions = (() => {
  2305. 	const drag = (event, clickCallback, moveCallback, target = video) => new Promise((resolve) => {
  2306. 		event.stopImmediatePropagation();
  2307. 		event.preventDefault();
  2308. 		
  2309. 		// window blur events don't fire if devtools is open
  2310. 		stopDrag?.();
  2311. 		
  2312. 		target.setPointerCapture(event.pointerId);
  2313. 		
  2314. 		css.tag(enabler.CLASS_DRAGGING);
  2315. 		
  2316. 		const cancel = (event) => {
  2317. 			event.stopImmediatePropagation();
  2318. 			event.preventDefault();
  2319. 		};
  2320. 		
  2321. 		document.addEventListener('click', cancel, true);
  2322. 		document.addEventListener('dblclick', cancel, true);
  2323. 		
  2324. 		const clickDisallowListener = ({clientX, clientY}) => {
  2325. 			const {clickCutoff} = $config.get();
  2326. 			const distance = Math.abs(event.clientX - clientX) + Math.abs(event.clientY - clientY);
  2327. 			
  2328. 			if (distance >= clickCutoff) {
  2329. 				target.removeEventListener('pointermove', clickDisallowListener);
  2330. 				target.removeEventListener('pointerup', clickCallback);
  2331. 			}
  2332. 		};
  2333. 		
  2334. 		if (clickCallback) {
  2335. 			target.addEventListener('pointermove', clickDisallowListener);
  2336. 			target.addEventListener('pointerup', clickCallback, {once: true});
  2337. 		}
  2338. 		
  2339. 		target.addEventListener('pointermove', moveCallback);
  2340. 		
  2341. 		stopDrag = () => {
  2342. 			css.tag(enabler.CLASS_DRAGGING, false);
  2343. 			
  2344. 			target.removeEventListener('pointermove', moveCallback);
  2345. 			
  2346. 			if (clickCallback) {
  2347. 				target.removeEventListener('pointermove', clickDisallowListener);
  2348. 				target.removeEventListener('pointerup', clickCallback);
  2349. 			}
  2350. 			
  2351. 			// delay removing listeners for events that happen after pointerup
  2352. 			window.setTimeout(() => {
  2353. 				document.removeEventListener('dblclick', cancel, true);
  2354. 				document.removeEventListener('click', cancel, true);
  2355. 			}, 0);
  2356. 			
  2357. 			window.removeEventListener('blur', stopDrag);
  2358. 			target.removeEventListener('pointerup', stopDrag);
  2359. 			
  2360. 			target.releasePointerCapture(event.pointerId);
  2361. 			
  2362. 			stopDrag = undefined;
  2363. 			
  2364. 			enabler.handleChange();
  2365. 			
  2366. 			resolve();
  2367. 		};
  2368. 		
  2369. 		window.addEventListener('blur', stopDrag);
  2370. 		target.addEventListener('pointerup', stopDrag);
  2371. 	});
  2372. 	
  2373. 	const getOnScroll = (() => {
  2374. 		// https://stackoverflow.com/a/30134826
  2375. 		const multipliers = [1, 40, 800];
  2376. 		
  2377. 		return (callback) => (event) => {
  2378. 			event.stopImmediatePropagation();
  2379. 			event.preventDefault();
  2380. 			
  2381. 			if (event.deltaY !== 0) {
  2382. 				callback(event.deltaY * multipliers[event.deltaMode]);
  2383. 			}
  2384. 		};
  2385. 	})();
  2386. 	
  2387. 	const addListeners = ({onMouseDown, onRightClick, onScroll}, doAdd = true) => {
  2388. 		const property = `${doAdd ? 'add' : 'remove'}EventListener`;
  2389. 		
  2390. 		altTarget[property]('pointerdown', onMouseDown);
  2391. 		altTarget[property]('contextmenu', onRightClick, true);
  2392. 		altTarget[property]('wheel', onScroll);
  2393. 	};
  2394. 	
  2395. 	return {
  2396. 		crop: new function () {
  2397. 			let top = 0, right = 0, bottom = 0, left = 0, handle;
  2398. 			
  2399. 			const values = {};
  2400. 			
  2401. 			Object.defineProperty(values, 'top', {get: () => top, set: (value) => top = value});
  2402. 			Object.defineProperty(values, 'right', {get: () => right, set: (value) => right = value});
  2403. 			Object.defineProperty(values, 'bottom', {get: () => bottom, set: (value) => bottom = value});
  2404. 			Object.defineProperty(values, 'left', {get: () => left, set: (value) => left = value});
  2405. 			
  2406. 			class Button {
  2407. 				// allowance for rounding errors
  2408. 				static ALLOWANCE_HANDLE = 0.0001;
  2409. 				
  2410. 				static CLASS_HANDLE = 'viewfind-crop-handle';
  2411. 				static CLASS_EDGES = {
  2412. 					left: 'viewfind-crop-left',
  2413. 					top: 'viewfind-crop-top',
  2414. 					right: 'viewfind-crop-right',
  2415. 					bottom: 'viewfind-crop-bottom',
  2416. 				};
  2417. 				
  2418. 				static OPPOSITES = {
  2419. 					left: 'right',
  2420. 					right: 'left',
  2421. 					
  2422. 					top: 'bottom',
  2423. 					bottom: 'top',
  2424. 				};
  2425. 				
  2426. 				callbacks = [];
  2427. 				
  2428. 				element = document.createElement('div');
  2429. 				
  2430. 				constructor(...edges) {
  2431. 					this.edges = edges;
  2432. 					
  2433. 					this.isHandle = true;
  2434. 					
  2435. 					this.element.style.position = 'absolute';
  2436. 					this.element.style.pointerEvents = 'all';
  2437. 					
  2438. 					for (const edge of edges) {
  2439. 						this.element.style[edge] = '0';
  2440. 						
  2441. 						this.element.classList.add(Button.CLASS_EDGES[edge]);
  2442. 						
  2443. 						this.element.style.setProperty(`border-${Button.OPPOSITES[edge]}-width`, '1px');
  2444. 					}
  2445. 					
  2446. 					this.element.addEventListener('contextmenu', (event) => {
  2447. 						event.stopPropagation();
  2448. 						event.preventDefault();
  2449. 						
  2450. 						this.reset(false);
  2451. 					});
  2452. 					
  2453. 					this.element.addEventListener('pointerdown', (() => {
  2454. 						const clickListener = ({offsetX, offsetY, target}) => {
  2455. 							this.set({
  2456. 								width: (this.edges.includes('left') ? offsetX : target.clientWidth - offsetX) / video.clientWidth,
  2457. 								height: (this.edges.includes('top') ? offsetY : target.clientHeight - offsetY) / video.clientHeight,
  2458. 							}, false);
  2459. 						};
  2460. 						
  2461. 						const getDragListener = (event, target) => {
  2462. 							const getWidth = (() => {
  2463. 								if (this.edges.includes('left')) {
  2464. 									const position = this.element.clientWidth - event.offsetX;
  2465. 									
  2466. 									return ({offsetX}) => offsetX + position;
  2467. 								}
  2468. 								
  2469. 								const position = target.offsetWidth + event.offsetX;
  2470. 								
  2471. 								return ({offsetX}) => position - offsetX;
  2472. 							})();
  2473. 							
  2474. 							const getHeight = (() => {
  2475. 								if (this.edges.includes('top')) {
  2476. 									const position = this.element.clientHeight - event.offsetY;
  2477. 									
  2478. 									return ({offsetY}) => offsetY + position;
  2479. 								}
  2480. 								
  2481. 								const position = target.offsetHeight + event.offsetY;
  2482. 								
  2483. 								return ({offsetY}) => position - offsetY;
  2484. 							})();
  2485. 							
  2486. 							return (event) => {
  2487. 								this.set({
  2488. 									width: getWidth(event) / video.clientWidth,
  2489. 									height: getHeight(event) / video.clientHeight,
  2490. 								});
  2491. 							};
  2492. 						};
  2493. 						
  2494. 						return async (event) => {
  2495. 							if (event.buttons === 1) {
  2496. 								const target = this.element.parentElement;
  2497. 								
  2498. 								if (this.isHandle) {
  2499. 									this.setPanel();
  2500. 								}
  2501. 								
  2502. 								await drag(event, clickListener, getDragListener(event, target), target);
  2503. 								
  2504. 								this.updateCounterpart();
  2505. 							}
  2506. 						};
  2507. 					})());
  2508. 				}
  2509. 				
  2510. 				notify() {
  2511. 					for (const callback of this.callbacks) {
  2512. 						callback();
  2513. 					}
  2514. 				}
  2515. 				
  2516. 				set isHandle(value) {
  2517. 					this._isHandle = value;
  2518. 					
  2519. 					this.element.classList[value ? 'add' : 'remove'](Button.CLASS_HANDLE);
  2520. 				}
  2521. 				
  2522. 				get isHandle() {
  2523. 					return this._isHandle;
  2524. 				}
  2525. 				
  2526. 				reset() {
  2527. 					this.isHandle = true;
  2528. 					
  2529. 					for (const edge of this.edges) {
  2530. 						values[edge] = 0;
  2531. 					}
  2532. 				}
  2533. 			}
  2534. 			
  2535. 			class EdgeButton extends Button {
  2536. 				constructor(edge) {
  2537. 					super(edge);
  2538. 					
  2539. 					this.edge = edge;
  2540. 				}
  2541. 				
  2542. 				updateCounterpart() {
  2543. 					if (this.counterpart.isHandle) {
  2544. 						this.counterpart.setHandle();
  2545. 					}
  2546. 				}
  2547. 				
  2548. 				setCrop(value = 0) {
  2549. 					values[this.edge] = value;
  2550. 				}
  2551. 				
  2552. 				setPanel() {
  2553. 					this.isHandle = false;
  2554. 					
  2555. 					this.setCrop(handle);
  2556. 					
  2557. 					this.setHandle();
  2558. 				}
  2559. 			}
  2560. 			
  2561. 			class SideButton extends EdgeButton {
  2562. 				flow() {
  2563. 					let size = 1;
  2564. 					
  2565. 					if (top <= Button.ALLOWANCE_HANDLE) {
  2566. 						size -= handle;
  2567. 						
  2568. 						this.element.style.top = `${handle * 100}%`;
  2569. 					} else {
  2570. 						size -= top;
  2571. 						
  2572. 						this.element.style.top = `${top * 100}%`;
  2573. 					}
  2574. 					
  2575. 					if (bottom <= Button.ALLOWANCE_HANDLE) {
  2576. 						size -= handle;
  2577. 					} else {
  2578. 						size -= bottom;
  2579. 					}
  2580. 					
  2581. 					this.element.style.height = `${Math.max(0, size * 100)}%`;
  2582. 				}
  2583. 				
  2584. 				setBounds(counterpart, components) {
  2585. 					this.counterpart = components[counterpart];
  2586. 					
  2587. 					components.top.callbacks.push(() => {
  2588. 						this.flow();
  2589. 					});
  2590. 					
  2591. 					components.bottom.callbacks.push(() => {
  2592. 						this.flow();
  2593. 					});
  2594. 				}
  2595. 				
  2596. 				setHandle(doNotify = true) {
  2597. 					this.element.style.width = `${Math.min(1 - values[this.counterpart.edge], handle) * 100}%`;
  2598. 					
  2599. 					if (doNotify) {
  2600. 						this.notify();
  2601. 					}
  2602. 				}
  2603. 				
  2604. 				set({width}, doUpdateCounterpart = true) {
  2605. 					if (this.isHandle !== (this.isHandle = width <= Button.ALLOWANCE_HANDLE)) {
  2606. 						this.flow();
  2607. 					}
  2608. 					
  2609. 					if (doUpdateCounterpart) {
  2610. 						this.updateCounterpart();
  2611. 					}
  2612. 					
  2613. 					if (this.isHandle) {
  2614. 						this.setCrop();
  2615. 						
  2616. 						this.setHandle();
  2617. 						
  2618. 						return;
  2619. 					}
  2620. 					
  2621. 					const size = Math.min(1 - values[this.counterpart.edge], width);
  2622. 					
  2623. 					this.setCrop(size);
  2624. 					
  2625. 					this.element.style.width = `${size * 100}%`;
  2626. 					
  2627. 					this.notify();
  2628. 				}
  2629. 				
  2630. 				reset(isGeneral = true) {
  2631. 					super.reset();
  2632. 					
  2633. 					if (isGeneral) {
  2634. 						this.element.style.top = `${handle * 100}%`;
  2635. 						this.element.style.height = `${(0.5 - handle) * 200}%`;
  2636. 						this.element.style.width = `${handle * 100}%`;
  2637. 						
  2638. 						return;
  2639. 					}
  2640. 					
  2641. 					this.flow();
  2642. 					
  2643. 					this.setHandle();
  2644. 					
  2645. 					this.updateCounterpart();
  2646. 				}
  2647. 			}
  2648. 			
  2649. 			class BaseButton extends EdgeButton {
  2650. 				flow() {
  2651. 					let size = 1;
  2652. 					
  2653. 					if (left <= Button.ALLOWANCE_HANDLE) {
  2654. 						size -= handle;
  2655. 						
  2656. 						this.element.style.left = `${handle * 100}%`;
  2657. 					} else {
  2658. 						size -= left;
  2659. 						
  2660. 						this.element.style.left = `${left * 100}%`;
  2661. 					}
  2662. 					
  2663. 					if (right <= Button.ALLOWANCE_HANDLE) {
  2664. 						size -= handle;
  2665. 					} else {
  2666. 						size -= right;
  2667. 					}
  2668. 					
  2669. 					this.element.style.width = `${Math.max(0, size) * 100}%`;
  2670. 				}
  2671. 				
  2672. 				setBounds(counterpart, components) {
  2673. 					this.counterpart = components[counterpart];
  2674. 					
  2675. 					components.left.callbacks.push(() => {
  2676. 						this.flow();
  2677. 					});
  2678. 					
  2679. 					components.right.callbacks.push(() => {
  2680. 						this.flow();
  2681. 					});
  2682. 				}
  2683. 				
  2684. 				setHandle(doNotify = true) {
  2685. 					this.element.style.height = `${Math.min(1 - values[this.counterpart.edge], handle) * 100}%`;
  2686. 					
  2687. 					if (doNotify) {
  2688. 						this.notify();
  2689. 					}
  2690. 				}
  2691. 				
  2692. 				set({height}, doUpdateCounterpart = false) {
  2693. 					if (this.isHandle !== (this.isHandle = height <= Button.ALLOWANCE_HANDLE)) {
  2694. 						this.flow();
  2695. 					}
  2696. 					
  2697. 					if (doUpdateCounterpart) {
  2698. 						this.updateCounterpart();
  2699. 					}
  2700. 					
  2701. 					if (this.isHandle) {
  2702. 						this.setCrop();
  2703. 						
  2704. 						this.setHandle();
  2705. 						
  2706. 						return;
  2707. 					}
  2708. 					
  2709. 					const size = Math.min(1 - values[this.counterpart.edge], height);
  2710. 					
  2711. 					this.setCrop(size);
  2712. 					
  2713. 					this.element.style.height = `${size * 100}%`;
  2714. 					
  2715. 					this.notify();
  2716. 				}
  2717. 				
  2718. 				reset(isGeneral = true) {
  2719. 					super.reset();
  2720. 					
  2721. 					if (isGeneral) {
  2722. 						this.element.style.left = `${handle * 100}%`;
  2723. 						this.element.style.width = `${(0.5 - handle) * 200}%`;
  2724. 						this.element.style.height = `${handle * 100}%`;
  2725. 						
  2726. 						return;
  2727. 					}
  2728. 					
  2729. 					this.flow();
  2730. 					
  2731. 					this.setHandle();
  2732. 					
  2733. 					this.updateCounterpart();
  2734. 				}
  2735. 			}
  2736. 			
  2737. 			class CornerButton extends Button {
  2738. 				static CLASS_NAME = 'viewfind-crop-corner';
  2739. 				
  2740. 				constructor(sectors, ...edges) {
  2741. 					super(...edges);
  2742. 					
  2743. 					this.element.classList.add(CornerButton.CLASS_NAME);
  2744. 					
  2745. 					this.sectors = sectors;
  2746. 					
  2747. 					for (const sector of sectors) {
  2748. 						sector.callbacks.push(this.flow.bind(this));
  2749. 					}
  2750. 				}
  2751. 				
  2752. 				flow() {
  2753. 					let isHandle = true;
  2754. 					
  2755. 					if (this.sectors[0].isHandle) {
  2756. 						this.element.style.width = `${Math.min(1 - values[this.sectors[0].counterpart.edge], handle) * 100}%`;
  2757. 					} else {
  2758. 						this.element.style.width = `${values[this.edges[0]] * 100}%`;
  2759. 						
  2760. 						isHandle = false;
  2761. 					}
  2762. 					
  2763. 					if (this.sectors[1].isHandle) {
  2764. 						this.element.style.height = `${Math.min(1 - values[this.sectors[1].counterpart.edge], handle) * 100}%`;
  2765. 					} else {
  2766. 						this.element.style.height = `${values[this.edges[1]] * 100}%`;
  2767. 						
  2768. 						isHandle = false;
  2769. 					}
  2770. 					
  2771. 					this.isHandle = isHandle;
  2772. 				}
  2773. 				
  2774. 				updateCounterpart() {
  2775. 					for (const sector of this.sectors) {
  2776. 						sector.updateCounterpart();
  2777. 					}
  2778. 				}
  2779. 				
  2780. 				set(size) {
  2781. 					for (const sector of this.sectors) {
  2782. 						sector.set(size);
  2783. 					}
  2784. 				}
  2785. 				
  2786. 				reset(isGeneral = true) {
  2787. 					this.isHandle = true;
  2788. 					
  2789. 					this.element.style.width = `${handle * 100}%`;
  2790. 					this.element.style.height = `${handle * 100}%`;
  2791. 					
  2792. 					if (isGeneral) {
  2793. 						return;
  2794. 					}
  2795. 					
  2796. 					for (const sector of this.sectors) {
  2797. 						sector.reset(false);
  2798. 					}
  2799. 				}
  2800. 				
  2801. 				setPanel() {
  2802. 					for (const sector of this.sectors) {
  2803. 						sector.setPanel();
  2804. 					}
  2805. 				}
  2806. 			}
  2807. 			
  2808. 			this.CODE = 'crop';
  2809. 			
  2810. 			this.CLASS_ABLE = 'viewfind-action-able-crop';
  2811. 			
  2812. 			const container = document.createElement('div');
  2813. 			
  2814. 			// todo ditch the containers object
  2815. 			container.style.width = container.style.height = 'inherit';
  2816. 			
  2817. 			containers.foreground.append(container);
  2818. 			
  2819. 			this.reset = () => {
  2820. 				for (const component of Object.values(this.components)) {
  2821. 					component.reset(true);
  2822. 				}
  2823. 			};
  2824. 			
  2825. 			this.onRightClick = (event) => {
  2826. 				if (event.target.parentElement.id === container.id) {
  2827. 					return;
  2828. 				}
  2829. 				
  2830. 				event.stopPropagation();
  2831. 				event.preventDefault();
  2832. 				
  2833. 				if (stopDrag) {
  2834. 					return;
  2835. 				}
  2836. 				
  2837. 				this.reset();
  2838. 			};
  2839. 			
  2840. 			this.onScroll = getOnScroll((distance) => {
  2841. 				const increment = distance * $config.get().speeds.crop / zoom.value;
  2842. 				
  2843. 				this.components.top.set({height: top + Math.min((1 - top - bottom) / 2, increment)});
  2844. 				this.components.left.set({width: left + Math.min((1 - left - right) / 2, increment)});
  2845. 				
  2846. 				this.components.bottom.set({height: bottom + increment});
  2847. 				this.components.right.set({width: right + increment});
  2848. 			});
  2849. 			
  2850. 			this.onMouseDown = (() => {
  2851. 				const getDragListener = () => {
  2852. 					const multiplier = $config.get().multipliers.crop;
  2853. 					
  2854. 					const setX = ((right, left, change) => {
  2855. 						const clamped = Math.max(-left, Math.min(right, change * multiplier / video.clientWidth));
  2856. 						
  2857. 						this.components.left.set({width: left + clamped});
  2858. 						this.components.right.set({width: right - clamped});
  2859. 					}).bind(undefined, right, left);
  2860. 					
  2861. 					const setY = ((top, bottom, change) => {
  2862. 						const clamped = Math.max(-top, Math.min(bottom, change * multiplier / video.clientHeight));
  2863. 						
  2864. 						this.components.top.set({height: top + clamped});
  2865. 						
  2866. 						this.components.bottom.set({height: bottom - clamped});
  2867. 					}).bind(undefined, top, bottom);
  2868. 					
  2869. 					let priorEvent;
  2870. 					
  2871. 					return ({offsetX, offsetY}) => {
  2872. 						if (!priorEvent) {
  2873. 							priorEvent = {offsetX, offsetY};
  2874. 							
  2875. 							return;
  2876. 						}
  2877. 						
  2878. 						setX(offsetX - priorEvent.offsetX);
  2879. 						setY(offsetY - priorEvent.offsetY);
  2880. 					};
  2881. 				};
  2882. 				
  2883. 				const clickListener = () => {
  2884. 					zoom.value = zoom.getFit((1 - left - right) * halfDimensions.video.width, (1 - top - bottom) * halfDimensions.video.height);
  2885. 					
  2886. 					zoom.constrain();
  2887. 					
  2888. 					position.x = (left - right) / 2;
  2889. 					position.y = (bottom - top) / 2;
  2890. 					
  2891. 					position.constrain();
  2892. 				};
  2893. 				
  2894. 				return (event) => {
  2895. 					if (event.buttons === 1) {
  2896. 						drag(event, clickListener, getDragListener(), container);
  2897. 					}
  2898. 				};
  2899. 			})();
  2900. 			
  2901. 			this.components = {
  2902. 				top: new BaseButton('top'),
  2903. 				right: new SideButton('right'),
  2904. 				bottom: new BaseButton('bottom'),
  2905. 				left: new SideButton('left'),
  2906. 			};
  2907. 			
  2908. 			this.components.top.setBounds('bottom', this.components);
  2909. 			this.components.right.setBounds('left', this.components);
  2910. 			this.components.bottom.setBounds('top', this.components);
  2911. 			this.components.left.setBounds('right', this.components);
  2912. 			
  2913. 			this.components.topLeft = new CornerButton([this.components.left, this.components.top], 'left', 'top');
  2914. 			this.components.topRight = new CornerButton([this.components.right, this.components.top], 'right', 'top');
  2915. 			this.components.bottomLeft = new CornerButton([this.components.left, this.components.bottom], 'left', 'bottom');
  2916. 			this.components.bottomRight = new CornerButton([this.components.right, this.components.bottom], 'right', 'bottom');
  2917. 			
  2918. 			container.append(...Object.values(this.components).map(({element}) => element));
  2919. 			
  2920. 			this.set = ({top, right, bottom, left}) => {
  2921. 				this.components.top.set({height: top});
  2922. 				this.components.right.set({width: right});
  2923. 				this.components.bottom.set({height: bottom});
  2924. 				this.components.left.set({width: left});
  2925. 			};
  2926. 			
  2927. 			this.onInactive = () => {
  2928. 				addListeners(this, false);
  2929. 				
  2930. 				if (crop.left === left && crop.top === top && crop.right === right && crop.bottom === bottom) {
  2931. 					return;
  2932. 				}
  2933. 				
  2934. 				crop.left = left;
  2935. 				crop.top = top;
  2936. 				crop.right = right;
  2937. 				crop.bottom = bottom;
  2938. 				
  2939. 				crop.apply();
  2940. 			};
  2941. 			
  2942. 			this.onActive = () => {
  2943. 				const config = $config.get().crop;
  2944. 				
  2945. 				handle = config.handle / Math.max(zoom.value, 1);
  2946. 				
  2947. 				for (const component of [this.components.top, this.components.bottom, this.components.left, this.components.right]) {
  2948. 					if (component.isHandle) {
  2949. 						component.setHandle();
  2950. 					}
  2951. 				}
  2952. 				
  2953. 				crop.reveal();
  2954. 				
  2955. 				addListeners(this);
  2956. 				
  2957. 				if (!enabler.isHidingGlow) {
  2958. 					glow.handleViewChange();
  2959. 					
  2960. 					glow.reset();
  2961. 				}
  2962. 			};
  2963. 			
  2964. 			const draggingSelector = css.getSelector(enabler.CLASS_DRAGGING);
  2965. 			
  2966. 			this.updateConfig = (() => {
  2967. 				const rule = new css.Toggleable();
  2968. 				
  2969. 				return () => {
  2970. 					// set handle size
  2971. 					for (const button of [this.components.left, this.components.top, this.components.right, this.components.bottom]) {
  2972. 						if (button.isHandle) {
  2973. 							button.setHandle();
  2974. 						}
  2975. 					}
  2976. 					
  2977. 					rule.remove();
  2978. 					
  2979. 					const {colour} = $config.get().crop;
  2980. 					const {id} = container;
  2981. 					
  2982. 					rule.add(`#${id}>:hover.${Button.CLASS_HANDLE},#${id}>:not(.${Button.CLASS_HANDLE})`, ['background-color', colour.fill]);
  2983. 					rule.add(`#${id}>*`, ['border-color', colour.border]);
  2984. 					rule.add(`#${id}:not(${draggingSelector} *)>:not(:hover)`, ['filter', `drop-shadow(${colour.shadow} 0 0 1px)`]);
  2985. 				};
  2986. 			})();
  2987. 			
  2988. 			$config.ready.then(() => {
  2989. 				this.updateConfig();
  2990. 			});
  2991. 			
  2992. 			container.id = 'viewfind-crop-container';
  2993. 			
  2994. 			(() => {
  2995. 				const {id} = container;
  2996. 				
  2997. 				css.add(`${css.getSelector(enabler.CLASS_DRAGGING)} #${id}`, ['cursor', 'grabbing']);
  2998. 				css.add(`${css.getSelector(enabler.CLASS_ABLE)} #${id}`, ['cursor', 'grab']);
  2999. 				css.add(`#${id}>:not(${draggingSelector} .${Button.CLASS_HANDLE})`, ['border-style', 'solid']);
  3000. 				css.add(`${draggingSelector} #${id}>.${Button.CLASS_HANDLE}`, ['filter', 'none']);
  3001. 				
  3002. 				for (const [side, sideClass] of Object.entries(Button.CLASS_EDGES)) {
  3003. 					css.add(
  3004. 						`${draggingSelector} #${id}>.${sideClass}.${Button.CLASS_HANDLE}~.${sideClass}.${CornerButton.CLASS_NAME}`,
  3005. 						[`border-${CornerButton.OPPOSITES[side]}-style`, 'none'],
  3006. 						['filter', 'none'],
  3007. 					);
  3008. 					
  3009. 					// in fullscreen, 16:9 videos get an offsetLeft of 1px on my 16:9 monitor
  3010. 					// I'm extending buttons by 1px so that they reach the edge of screens like mine at default zoom
  3011. 					css.add(`#${id}>.${sideClass}`, [`margin-${side}`, '-1px'], [`padding-${side}`, '1px']);
  3012. 				}
  3013. 				
  3014. 				css.add(`#${id}:not(.${this.CLASS_ABLE} *)`, ['display', 'none']);
  3015. 			})();
  3016. 		}(),
  3017. 		
  3018. 		pan: new function () {
  3019. 			this.CODE = 'pan';
  3020. 			
  3021. 			this.CLASS_ABLE = 'viewfind-action-able-pan';
  3022. 			
  3023. 			this.onActive = () => {
  3024. 				this.updateCrosshair();
  3025. 				
  3026. 				addListeners(this);
  3027. 			};
  3028. 			
  3029. 			this.onInactive = () => {
  3030. 				addListeners(this, false);
  3031. 			};
  3032. 			
  3033. 			this.updateCrosshair = (() => {
  3034. 				const getRoundedString = (number, decimal = 2) => {
  3035. 					const raised = `${Math.round(number * Math.pow(10, decimal))}`.padStart(decimal + 1, '0');
  3036. 					
  3037. 					return `${raised.substr(0, raised.length - decimal)}.${raised.substr(raised.length - decimal)}`;
  3038. 				};
  3039. 				
  3040. 				const getSigned = (ratio) => {
  3041. 					const percent = Math.round(ratio * 100);
  3042. 					
  3043. 					if (percent <= 0) {
  3044. 						return `${percent}`;
  3045. 					}
  3046. 					
  3047. 					return `+${percent}`;
  3048. 				};
  3049. 				
  3050. 				return () => {
  3051. 					crosshair.text.innerText = `${getRoundedString(zoom.value)}×\n${getSigned(position.x)}%\n${getSigned(position.y)}%`;
  3052. 				};
  3053. 			})();
  3054. 			
  3055. 			this.onScroll = getOnScroll((distance) => {
  3056. 				const increment = distance * $config.get().speeds.zoom;
  3057. 				
  3058. 				if (increment > 0) {
  3059. 					zoom.value *= 1 + increment;
  3060. 				} else {
  3061. 					zoom.value /= 1 - increment;
  3062. 				}
  3063. 				
  3064. 				zoom.constrain();
  3065. 				
  3066. 				position.constrain();
  3067. 				
  3068. 				this.updateCrosshair();
  3069. 			});
  3070. 			
  3071. 			this.onRightClick = (event) => {
  3072. 				event.stopImmediatePropagation();
  3073. 				event.preventDefault();
  3074. 				
  3075. 				if (stopDrag) {
  3076. 					return;
  3077. 				}
  3078. 				
  3079. 				position.x = position.y = 0;
  3080. 				zoom.value = 1;
  3081. 				
  3082. 				position.apply();
  3083. 				
  3084. 				zoom.constrain();
  3085. 				
  3086. 				this.updateCrosshair();
  3087. 			};
  3088. 			
  3089. 			this.onMouseDown = (() => {
  3090. 				const getDragListener = () => {
  3091. 					const {multipliers} = $config.get();
  3092. 					
  3093. 					let priorEvent;
  3094. 					
  3095. 					const change = {x: 0, y: 0};
  3096. 					
  3097. 					return ({offsetX, offsetY}) => {
  3098. 						if (priorEvent) {
  3099. 							change.x = (priorEvent.offsetX + change.x - offsetX) * multipliers.pan;
  3100. 							change.y = (priorEvent.offsetY - change.y - offsetY) * -multipliers.pan;
  3101. 							
  3102. 							position.x += change.x / video.clientWidth;
  3103. 							position.y += change.y / video.clientHeight;
  3104. 							
  3105. 							position.constrain();
  3106. 							
  3107. 							this.updateCrosshair();
  3108. 						}
  3109. 						
  3110. 						// events in firefox seem to lose their data after finishing propagation
  3111. 						// so assigning the whole event doesn't work
  3112. 						priorEvent = {offsetX, offsetY};
  3113. 					};
  3114. 				};
  3115. 				
  3116. 				const clickListener = (event) => {
  3117. 					position.x = event.offsetX / video.clientWidth - 0.5;
  3118. 					// Y increases moving down the page
  3119. 					// I flip that to make trigonometry easier
  3120. 					position.y = -event.offsetY / video.clientHeight + 0.5;
  3121. 					
  3122. 					position.constrain(true);
  3123. 					
  3124. 					this.updateCrosshair();
  3125. 				};
  3126. 				
  3127. 				return (event) => {
  3128. 					if (event.buttons === 1) {
  3129. 						drag(event, clickListener, getDragListener());
  3130. 					}
  3131. 				};
  3132. 			})();
  3133. 		}(),
  3134. 		
  3135. 		rotate: new function () {
  3136. 			this.CODE = 'rotate';
  3137. 			
  3138. 			this.CLASS_ABLE = 'viewfind-action-able-rotate';
  3139. 			
  3140. 			this.onActive = () => {
  3141. 				this.updateCrosshair();
  3142. 				
  3143. 				addListeners(this);
  3144. 			};
  3145. 			
  3146. 			this.onInactive = () => {
  3147. 				addListeners(this, false);
  3148. 			};
  3149. 			
  3150. 			this.updateCrosshair = () => {
  3151. 				const angle = DEGREES[90] - rotation.value;
  3152. 				
  3153. 				crosshair.text.innerText = `${Math.floor((DEGREES[90] - rotation.value) / Math.PI * 180)}°\n≈${Math.round(angle / DEGREES[90]) % 4 * 90}°`;
  3154. 			};
  3155. 			
  3156. 			this.onScroll = getOnScroll((distance) => {
  3157. 				rotation.value += distance * $config.get().speeds.rotate;
  3158. 				
  3159. 				rotation.constrain();
  3160. 				
  3161. 				zoom.constrain();
  3162. 				position.constrain();
  3163. 				
  3164. 				this.updateCrosshair();
  3165. 			});
  3166. 			
  3167. 			this.onRightClick = (event) => {
  3168. 				event.stopImmediatePropagation();
  3169. 				event.preventDefault();
  3170. 				
  3171. 				if (stopDrag) {
  3172. 					return;
  3173. 				}
  3174. 				
  3175. 				rotation.value = DEGREES[90];
  3176. 				
  3177. 				rotation.apply();
  3178. 				
  3179. 				zoom.constrain();
  3180. 				position.constrain();
  3181. 				
  3182. 				this.updateCrosshair();
  3183. 			};
  3184. 			
  3185. 			this.onMouseDown = (() => {
  3186. 				const getDragListener = () => {
  3187. 					const {multipliers} = $config.get();
  3188. 					const middleX = containers.tracker.clientWidth / 2;
  3189. 					const middleY = containers.tracker.clientHeight / 2;
  3190. 					
  3191. 					const priorPosition = position.getValues();
  3192. 					const priorZoom = zoom.value;
  3193. 					
  3194. 					let priorMouseTheta;
  3195. 					
  3196. 					return (event) => {
  3197. 						const mouseTheta = getTheta(middleX, middleY, event.offsetX, event.offsetY);
  3198. 						
  3199. 						if (priorMouseTheta === undefined) {
  3200. 							priorMouseTheta = mouseTheta;
  3201. 							
  3202. 							return;
  3203. 						}
  3204. 						
  3205. 						position.x = priorPosition.x;
  3206. 						position.y = priorPosition.y;
  3207. 						zoom.value = priorZoom;
  3208. 						
  3209. 						rotation.value += (priorMouseTheta - mouseTheta) * multipliers.rotate;
  3210. 						
  3211. 						rotation.constrain();
  3212. 						
  3213. 						zoom.constrain();
  3214. 						position.constrain();
  3215. 						
  3216. 						this.updateCrosshair();
  3217. 						
  3218. 						priorMouseTheta = mouseTheta;
  3219. 					};
  3220. 				};
  3221. 				
  3222. 				const clickListener = () => {
  3223. 					rotation.value = Math.round(rotation.value / DEGREES[90]) * DEGREES[90];
  3224. 					
  3225. 					rotation.constrain();
  3226. 					
  3227. 					zoom.constrain();
  3228. 					position.constrain();
  3229. 					
  3230. 					this.updateCrosshair();
  3231. 				};
  3232. 				
  3233. 				return (event) => {
  3234. 					if (event.buttons === 1) {
  3235. 						drag(event, clickListener, getDragListener(), containers.tracker);
  3236. 					}
  3237. 				};
  3238. 			})();
  3239. 		}(),
  3240. 		
  3241. 		configure: new function () {
  3242. 			this.CODE = 'config';
  3243. 			
  3244. 			this.onActive = async () => {
  3245. 				await $config.edit();
  3246. 				
  3247. 				updateConfigs();
  3248. 				
  3249. 				viewport.focus();
  3250. 				
  3251. 				glow.reset();
  3252. 				
  3253. 				position.constrain();
  3254. 				zoom.constrain();
  3255. 			};
  3256. 		}(),
  3257. 		
  3258. 		reset: new function () {
  3259. 			this.CODE = 'reset';
  3260. 			
  3261. 			this.onActive = () => {
  3262. 				if (this.restore) {
  3263. 					this.restore();
  3264. 				} else {
  3265. 					this.restore = peek();
  3266. 				}
  3267. 			};
  3268. 		}(),
  3269. 	};
  3270. })();
  3271.  
  3272. const crosshair = new function () {
  3273. 	this.container = document.createElement('div');
  3274. 	
  3275. 	this.lines = {
  3276. 		horizontal: document.createElement('div'),
  3277. 		vertical: document.createElement('div'),
  3278. 	};
  3279. 	
  3280. 	this.text = document.createElement('div');
  3281. 	
  3282. 	const id = 'viewfind-crosshair';
  3283. 	
  3284. 	this.container.id = id;
  3285. 	this.container.classList.add(CLASS_VIEWFINDER);
  3286. 	
  3287. 	css.add(`#${id}:not(${css.getSelector(actions.pan.CLASS_ABLE)} *):not(${css.getSelector(actions.rotate.CLASS_ABLE)} *)`, ['display', 'none']);
  3288. 	
  3289. 	this.lines.horizontal.style.position = this.lines.vertical.style.position = this.text.style.position = this.container.style.position = 'absolute';
  3290. 	
  3291. 	this.lines.horizontal.style.top = '50%';
  3292. 	this.lines.horizontal.style.width = '100%';
  3293. 	
  3294. 	this.lines.vertical.style.left = '50%';
  3295. 	this.lines.vertical.style.height = '100%';
  3296. 	
  3297. 	this.text.style.userSelect = 'none';
  3298. 	
  3299. 	this.container.style.top = '0';
  3300. 	this.container.style.width = '100%';
  3301. 	this.container.style.height = '100%';
  3302. 	this.container.style.pointerEvents = 'none';
  3303. 	
  3304. 	this.container.append(this.lines.horizontal, this.lines.vertical);
  3305. 	
  3306. 	this.clip = () => {
  3307. 		const {outer, inner, gap} = $config.get().crosshair;
  3308. 		
  3309. 		const thickness = Math.max(inner, outer);
  3310. 		
  3311. 		const {width, height} = halfDimensions.viewport;
  3312. 		const halfGap = gap / 2;
  3313. 		
  3314. 		const startInner = (thickness - inner) / 2;
  3315. 		const startOuter = (thickness - outer) / 2;
  3316. 		
  3317. 		const endInner = thickness - startInner;
  3318. 		const endOuter = thickness - startOuter;
  3319. 		
  3320. 		this.lines.horizontal.style.clipPath = 'path(\''
  3321. 			+ `M0 ${startOuter}L${width - halfGap} ${startOuter}L${width - halfGap} ${startInner}L${width + halfGap} ${startInner}L${width + halfGap} ${startOuter}L${viewport.clientWidth} ${startOuter}`
  3322. 			+ `L${viewport.clientWidth} ${endOuter}L${width + halfGap} ${endOuter}L${width + halfGap} ${endInner}L${width - halfGap} ${endInner}L${width - halfGap} ${endOuter}L0 ${endOuter}`
  3323. 			+ 'Z\')';
  3324. 		
  3325. 		this.lines.vertical.style.clipPath = 'path(\''
  3326. 			+ `M${startOuter} 0L${startOuter} ${height - halfGap}L${startInner} ${height - halfGap}L${startInner} ${height + halfGap}L${startOuter} ${height + halfGap}L${startOuter} ${viewport.clientHeight}`
  3327. 			+ `L${endOuter} ${viewport.clientHeight}L${endOuter} ${height + halfGap}L${endInner} ${height + halfGap}L${endInner} ${height - halfGap}L${endOuter} ${height - halfGap}L${endOuter} 0`
  3328. 			+ 'Z\')';
  3329. 	};
  3330. 	
  3331. 	this.updateConfig = (doClip = true) => {
  3332. 		const {colour, outer, inner, text} = $config.get().crosshair;
  3333. 		const thickness = Math.max(inner, outer);
  3334. 		
  3335. 		this.container.style.filter = `drop-shadow(${colour.shadow} 0 0 1px)`;
  3336. 		
  3337. 		this.lines.horizontal.style.translate = `0 -${thickness / 2}px`;
  3338. 		this.lines.vertical.style.translate = `-${thickness / 2}px 0`;
  3339. 		
  3340. 		this.lines.horizontal.style.height = this.lines.vertical.style.width = `${thickness}px`;
  3341. 		
  3342. 		this.lines.horizontal.style.backgroundColor = this.lines.vertical.style.backgroundColor = colour.fill;
  3343. 		
  3344. 		if (text) {
  3345. 			this.text.style.color = colour.fill;
  3346. 			
  3347. 			this.text.style.font = text.font;
  3348. 			this.text.style.left = `${text.position.x}%`;
  3349. 			this.text.style.top = `${text.position.y}%`;
  3350. 			this.text.style.transform = `translate(${text.translate.x}%,${text.translate.y}%) translate(${text.offset.x}px,${text.offset.y}px)`;
  3351. 			this.text.style.textAlign = text.align;
  3352. 			this.text.style.lineHeight = text.height;
  3353. 			
  3354. 			this.container.append(this.text);
  3355. 		} else {
  3356. 			this.text.remove();
  3357. 		}
  3358. 		
  3359. 		if (doClip) {
  3360. 			this.clip();
  3361. 		}
  3362. 	};
  3363. 	
  3364. 	$config.ready.then(() => {
  3365. 		this.updateConfig(false);
  3366. 	});
  3367. }();
  3368.  
  3369. // ELEMENT CHANGE LISTENERS
  3370.  
  3371. const observer = new function () {
  3372. 	const onResolutionChange = () => {
  3373. 		glow.handleSizeChange?.();
  3374. 	};
  3375. 	
  3376. 	const styleObserver = new MutationObserver((() => {
  3377. 		const properties = ['top', 'left', 'width', 'height', 'scale', 'rotate', 'translate', 'transform-origin'];
  3378. 		
  3379. 		let priorStyle;
  3380. 		
  3381. 		return () => {
  3382. 			// mousemove events on video with ctrlKey=true trigger this but have no effect
  3383. 			if (video.style.cssText === priorStyle) {
  3384. 				return;
  3385. 			}
  3386. 			
  3387. 			priorStyle = video.style.cssText;
  3388. 			
  3389. 			for (const property of properties) {
  3390. 				containers.background.style[property] = video.style[property];
  3391. 				containers.foreground.style[property] = video.style[property];
  3392. 				
  3393. 				// cinematics doesn't exist for embedded vids
  3394. 				if (cinematics) {
  3395. 					cinematics.style[property] = video.style[property];
  3396. 				}
  3397. 			}
  3398. 			
  3399. 			glow.handleViewChange();
  3400. 		};
  3401. 	})());
  3402. 	
  3403. 	const videoObserver = new ResizeObserver(() => {
  3404. 		handleVideoChange();
  3405. 		
  3406. 		glow.handleSizeChange?.();
  3407. 	});
  3408. 	
  3409. 	const viewportObserver = new ResizeObserver(() => {
  3410. 		handleViewportChange();
  3411. 		
  3412. 		crosshair.clip();
  3413. 	});
  3414. 	
  3415. 	this.start = () => {
  3416. 		video.addEventListener('resize', onResolutionChange);
  3417. 		
  3418. 		styleObserver.observe(video, {attributes: true, attributeFilter: ['style']});
  3419. 		viewportObserver.observe(viewport);
  3420. 		videoObserver.observe(video);
  3421. 		
  3422. 		glow.handleViewChange();
  3423. 	};
  3424. 	
  3425. 	this.stop = () => {
  3426. 		video.removeEventListener('resize', onResolutionChange);
  3427. 		
  3428. 		styleObserver.disconnect();
  3429. 		viewportObserver.disconnect();
  3430. 		videoObserver.disconnect();
  3431. 	};
  3432. }();
  3433.  
  3434. // NAVIGATION LISTENERS
  3435.  
  3436. const stop = () => {
  3437. 	if (stopped) {
  3438. 		return;
  3439. 	}
  3440. 	
  3441. 	stopped = true;
  3442. 	
  3443. 	enabler.stop();
  3444. 	
  3445. 	stopDrag?.();
  3446. 	
  3447. 	observer.stop();
  3448. 	
  3449. 	containers.background.remove();
  3450. 	containers.foreground.remove();
  3451. 	containers.tracker.remove();
  3452. 	crosshair.container.remove();
  3453. 	
  3454. 	return peek(true);
  3455. };
  3456.  
  3457. const start = () => {
  3458. 	if (!stopped || viewport.classList.contains('ad-showing')) {
  3459. 		return;
  3460. 	}
  3461. 	
  3462. 	stopped = false;
  3463. 	
  3464. 	observer.start();
  3465. 	
  3466. 	glow.start();
  3467. 	
  3468. 	viewport.append(containers.background, containers.foreground, containers.tracker, crosshair.container);
  3469. 	
  3470. 	// User may have a static minimum zoom greater than 1
  3471. 	zoom.constrain();
  3472. 	
  3473. 	enabler.handleChange();
  3474. };
  3475.  
  3476. const updateConfigs = () => {
  3477. 	ConfigCache.id++;
  3478. 	
  3479. 	enabler.updateConfig();
  3480. 	actions.crop.updateConfig();
  3481. 	crosshair.updateConfig();
  3482. };
  3483.  
  3484. // LISTENER ASSIGNMENTS
  3485.  
  3486. // load & navigation
  3487. (() => {
  3488. 	const getNode = (node, selector, ...selectors) => new Promise((resolve) => {
  3489. 		for (const child of node.children) {
  3490. 			if (child.matches(selector)) {
  3491. 				resolve(selectors.length === 0 ? child : getNode(child, ...selectors));
  3492. 				
  3493. 				return;
  3494. 			}
  3495. 		}
  3496. 		
  3497. 		new MutationObserver((changes, observer) => {
  3498. 			for (const {addedNodes} of changes) {
  3499. 				for (const child of addedNodes) {
  3500. 					if (child.matches(selector)) {
  3501. 						resolve(selectors.length === 0 ? child : getNode(child, ...selectors));
  3502. 						
  3503. 						observer.disconnect();
  3504. 						
  3505. 						return;
  3506. 					}
  3507. 				}
  3508. 			}
  3509. 		}).observe(node, {childList: true});
  3510. 	});
  3511. 	
  3512. 	const init = async () => {
  3513. 		if (unsafeWindow.ytplayer?.bootstrapPlayerContainer?.childElementCount > 0) {
  3514. 			// wait for the video to be moved to ytd-app
  3515. 			await new Promise((resolve) => {
  3516. 				new MutationObserver((changes, observer) => {
  3517. 					resolve();
  3518. 					
  3519. 					observer.disconnect();
  3520. 				}).observe(unsafeWindow.ytplayer.bootstrapPlayerContainer, {childList: true});
  3521. 			});
  3522. 		}
  3523. 		
  3524. 		try {
  3525. 			await $config.ready;
  3526. 		} catch (error) {
  3527. 			if (!$config.reset || !window.confirm(`${error.message}\n\nWould you like to erase your data?`)) {
  3528. 				console.error(error);
  3529. 				
  3530. 				return;
  3531. 			}
  3532. 			
  3533. 			await $config.reset();
  3534. 			
  3535. 			updateConfigs();
  3536. 		}
  3537. 		
  3538. 		if (isEmbed) {
  3539. 			video = document.body.querySelector(SELECTOR_VIDEO);
  3540. 		} else {
  3541. 			const pageManager = await getNode(document.body, 'ytd-app', '#content', 'ytd-page-manager');
  3542. 			
  3543. 			const page = pageManager.getCurrentPage() ?? await new Promise((resolve) => {
  3544. 				new MutationObserver(([{addedNodes: [page]}], observer) => {
  3545. 					if (page) {
  3546. 						resolve(page);
  3547. 						
  3548. 						observer.disconnect();
  3549. 					}
  3550. 				}).observe(pageManager, {childList: true});
  3551. 			});
  3552. 			
  3553. 			await page.playerEl.getPlayerPromise();
  3554. 			
  3555. 			video = page.playerEl.querySelector(SELECTOR_VIDEO);
  3556. 			cinematics = page.querySelector('#cinematics');
  3557. 			
  3558. 			// navigation to a new video
  3559. 			new MutationObserver(() => {
  3560. 				video.removeEventListener('play', startIfReady);
  3561. 				
  3562. 				power.off();
  3563. 				
  3564. 				// this callback can occur after metadata loads
  3565. 				startIfReady();
  3566. 			}).observe(page, {attributes: true, attributeFilter: ['video-id']});
  3567. 			
  3568. 			// navigation to a non-video page
  3569. 			new MutationObserver(() => {
  3570. 				if (video.src === '') {
  3571. 					video.removeEventListener('play', startIfReady);
  3572. 					
  3573. 					power.off();
  3574. 				}
  3575. 			}).observe(video, {attributes: true, attributeFilter: ['src']});
  3576. 		}
  3577. 		
  3578. 		viewport = video.parentElement.parentElement;
  3579. 		altTarget = viewport.parentElement;
  3580. 		
  3581. 		containers.foreground.style.zIndex = crosshair.container.style.zIndex = video.parentElement.computedStyleMap?.().get('z-index').value ?? 10;
  3582. 		crosshair.clip();
  3583. 		
  3584. 		handleVideoChange();
  3585. 		handleViewportChange();
  3586. 		
  3587. 		const startIfReady = () => {
  3588. 			if (video.readyState >= HTMLMediaElement.HAVE_METADATA) {
  3589. 				start();
  3590. 			}
  3591. 		};
  3592. 		
  3593. 		const power = new function () {
  3594. 			this.off = () => {
  3595. 				delete this.wake;
  3596. 				
  3597. 				stop();
  3598. 			};
  3599. 			
  3600. 			this.sleep = () => {
  3601. 				this.wake ??= stop();
  3602. 			};
  3603. 		}();
  3604. 		
  3605. 		new MutationObserver((() => {
  3606. 			return () => {
  3607. 				// video end
  3608. 				if (viewport.classList.contains('ended-mode')) {
  3609. 					power.off();
  3610. 					
  3611. 					video.addEventListener('play', startIfReady, {once: true});
  3612. 				// ad start
  3613. 				} else if (viewport.classList.contains('ad-showing')) {
  3614. 					power.sleep();
  3615. 				}
  3616. 			};
  3617. 		})()).observe(viewport, {attributes: true, attributeFilter: ['class']});
  3618. 		
  3619. 		// glow initialisation requires video dimensions
  3620. 		startIfReady();
  3621. 		
  3622. 		video.addEventListener('loadedmetadata', () => {
  3623. 			if (viewport.classList.contains('ad-showing')) {
  3624. 				return;
  3625. 			}
  3626. 			
  3627. 			start();
  3628. 			
  3629. 			if (power.wake) {
  3630. 				power.wake();
  3631. 				
  3632. 				delete power.wake;
  3633. 			}
  3634. 		});
  3635. 	};
  3636. 	
  3637. 	if (!('ytPageType' in unsafeWindow) || unsafeWindow.ytPageType === 'watch') {
  3638. 		init();
  3639. 		
  3640. 		return;
  3641. 	}
  3642. 	
  3643. 	const initListener = ({detail: {newPageType}}) => {
  3644. 		if (newPageType === 'ytd-watch-flexy') {
  3645. 			init();
  3646. 			
  3647. 			document.body.removeEventListener('yt-page-type-changed', initListener);
  3648. 		}
  3649. 	};
  3650. 	
  3651. 	document.body.addEventListener('yt-page-type-changed', initListener);
  3652. })();
  3653.  
  3654. // keyboard state change
  3655.  
  3656. document.addEventListener('keydown', ({code}) => {
  3657. 	if (enabler.toggled) {
  3658. 		enabler.keys[enabler.keys.has(code) ? 'delete' : 'add'](code);
  3659. 		
  3660. 		enabler.handleChange();
  3661. 	} else if (!enabler.keys.has(code)) {
  3662. 		enabler.keys.add(code);
  3663. 		
  3664. 		enabler.handleChange();
  3665. 	}
  3666. });
  3667.  
  3668. document.addEventListener('keyup', ({code}) => {
  3669. 	if (enabler.toggled) {
  3670. 		return;
  3671. 	}
  3672. 	
  3673. 	if (enabler.keys.has(code)) {
  3674. 		enabler.keys.delete(code);
  3675. 		
  3676. 		enabler.handleChange();
  3677. 	}
  3678. });
  3679.  
  3680. window.addEventListener('blur', () => {
  3681. 	if (enabler.toggled) {
  3682. 		stopDrag?.();
  3683. 	} else {
  3684. 		enabler.keys.clear();
  3685. 		
  3686. 		enabler.handleChange();
  3687. 	}
  3688. });
  3689.  
  3690. // failsafe config access
  3691.  
  3692. new MutationObserver((changes) => {
  3693. 	for (const {addedNodes} of changes) {
  3694. 		for (const node of addedNodes) {
  3695. 			if (!node.classList.contains('ytp-contextmenu')) {
  3696. 				continue;
  3697. 			}
  3698. 			
  3699. 			const container = node.querySelector('.ytp-panel-menu');
  3700. 			const option = container.lastElementChild.cloneNode(true);
  3701. 			
  3702. 			option.children[0].style.visibility = 'hidden';
  3703. 			option.children[1].innerText = 'Configure Viewfinding';
  3704. 			
  3705. 			option.addEventListener('click', ({button}) => {
  3706. 				if (button === 0) {
  3707. 					actions.configure.onActive();
  3708. 				}
  3709. 			});
  3710. 			
  3711. 			container.appendChild(option);
  3712. 			
  3713. 			new ResizeObserver((_, observer) => {
  3714. 				if (container.clientWidth === 0) {
  3715. 					option.remove();
  3716. 					
  3717. 					observer.disconnect();
  3718. 				}
  3719. 			}).observe(container);
  3720. 		}
  3721. 	}
  3722. }).observe(document.body, {childList: true});
  3723. })();