☰

YouTube Viewfinding

Zoom, rotate & crop YouTube videos

  1. // ==UserScript==
  2. // @name        YouTube Viewfinding
  3. // @version     0.15
  4. // @description Zoom, rotate & crop YouTube videos
  5. // @author      Callum Latham
  6. // @namespace   https://gf.qytechs.cn/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.gf.qytechs.cn/scripts/446506/1537901/%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: (children) => {
  71. 								const isMatch = ({children: a}, {children: b}) => {
  72. 									if (a.length !== b.length) {
  73. 										return false;
  74. 									}
  75. 									
  76. 									return a.every(({value: keyA}) => b.some(({value: keyB}) => keyA === keyB));
  77. 								};
  78. 								
  79. 								for (let i = 1; i < children.length; ++i) {
  80. 									if (children.slice(i).some((child) => isMatch(children[i - 1], child))) {
  81. 										return 'Another action has this key combination';
  82. 									}
  83. 								}
  84. 								
  85. 								return true;
  86. 							},
  87. 							get: (_, configs) => ({keys: Object.assign(...configs)}),
  88. 							children: (() => {
  89. 								const seed = {
  90. 									value: '',
  91. 									listeners: {
  92. 										keydown: (event) => {
  93. 											switch (event.key) {
  94. 											case 'Enter':
  95. 											case 'Escape':
  96. 												return;
  97. 											}
  98. 											
  99. 											event.preventDefault();
  100. 											
  101. 											event.target.value = event.code;
  102. 											
  103. 											event.target.dispatchEvent(new InputEvent('input'));
  104. 										},
  105. 									},
  106. 								};
  107. 								
  108. 								const getKeys = (children) => new Set(children.map(({value}) => value));
  109. 								
  110. 								const getNode = (label, keys, get) => ({
  111. 									label,
  112. 									seed,
  113. 									children: keys.map((value) => ({...seed, value})),
  114. 									get,
  115. 								});
  116. 								
  117. 								return [
  118. 									{
  119. 										label: 'Actions',
  120. 										get: (_, [toggle, ...controls]) => Object.assign(...controls.map(({id, keys}) => ({
  121. 											[id]: {
  122. 												toggle,
  123. 												keys,
  124. 											},
  125. 										}))),
  126. 										children: [
  127. 											{
  128. 												label: 'Toggle?',
  129. 												value: false,
  130. 												get: ({value}) => value,
  131. 											},
  132. 											...[
  133. 												['Pan / Zoom', ['KeyZ'], 'pan'],
  134. 												['Rotate', ['IntlBackslash'], 'rotate'],
  135. 												['Crop', ['KeyZ', 'IntlBackslash'], 'crop'],
  136. 											].map(([label, keys, id]) => getNode(label, keys, ({children}) => ({id, keys: getKeys(children)}))),
  137. 										],
  138. 									},
  139. 									getNode('Reset', ['KeyX'], ({children}) => ({reset: {keys: getKeys(children)}})),
  140. 									getNode('Configure', ['AltLeft', 'KeyX'], ({children}) => ({config: {keys: getKeys(children)}})),
  141. 								];
  142. 							})(),
  143. 						},
  144. 						{
  145. 							label: 'Scroll Speeds',
  146. 							get: (_, configs) => ({speeds: Object.assign(...configs)}),
  147. 							children: [
  148. 								{
  149. 									label: 'Zoom',
  150. 									value: -100,
  151. 									get: ({value}) => ({zoom: value / 150000}),
  152. 								},
  153. 								{
  154. 									label: 'Rotate',
  155. 									value: -100,
  156. 									// 150000 * (5 - 0.8) / 2π ≈ 100000
  157. 									get: ({value}) => ({rotate: value / 100000}),
  158. 								},
  159. 								{
  160. 									label: 'Crop',
  161. 									value: -100,
  162. 									get: ({value}) => ({crop: value / 300000}),
  163. 								},
  164. 							],
  165. 						},
  166. 						{
  167. 							label: 'Drag Inversions',
  168. 							get: (_, configs) => ({multipliers: Object.assign(...configs)}),
  169. 							children: [
  170. 								['Pan', 'pan'],
  171. 								['Rotate', 'rotate'],
  172. 								['Crop', 'crop'],
  173. 							].map(([label, key, value = false]) => ({
  174. 								label,
  175. 								value,
  176. 								get: ({value}) => ({[key]: value ? -1 : 1}),
  177. 							})),
  178. 						},
  179. 						{
  180. 							label: 'Click Movement Allowance (px)',
  181. 							value: 2,
  182. 							predicate: (value) => value >= 0 || 'Allowance must be positive',
  183. 							inputAttributes: {min: 0},
  184. 							get: ({value: clickCutoff}) => ({clickCutoff}),
  185. 						},
  186. 					],
  187. 				},
  188. 				{
  189. 					label: 'Behaviour',
  190. 					children: [
  191. 						...(() => {
  192. 							const typeNode = {
  193. 								label: 'Type',
  194. 								get: ({value}) => ({type: value}),
  195. 							};
  196. 							
  197. 							const staticNode = {
  198. 								label: 'Value (%)',
  199. 								predicate: (value) => value >= 0 || 'Limit must be positive',
  200. 								inputAttributes: {min: 0},
  201. 								get: ({value}) => ({custom: value / 100}),
  202. 							};
  203. 							
  204. 							const fitNode = {
  205. 								label: 'Glow Allowance (%)',
  206. 								predicate: (value) => value >= 0 || 'Allowance must be positive',
  207. 								inputAttributes: {min: 0},
  208. 								get: ({value}) => ({frame: value / 100}),
  209. 							};
  210. 							
  211. 							const options = Object.values(LIMITS);
  212. 							
  213. 							const getNode = (label, key, value, customValue, glowAllowance = 300) => {
  214. 								const staticId = getHideId();
  215. 								const fitId = getHideId();
  216. 								const onUpdate = (value) => ({
  217. 									hide: {
  218. 										[staticId]: value !== LIMITS.static,
  219. 										[fitId]: value !== LIMITS.fit,
  220. 									},
  221. 								});
  222. 								
  223. 								return {
  224. 									label,
  225. 									get: (_, configs) => ({[key]: Object.assign(...configs)}),
  226. 									children: [
  227. 										{...typeNode, value, options, onUpdate},
  228. 										{...staticNode, value: customValue, hideId: staticId},
  229. 										{...fitNode, value: glowAllowance, hideId: fitId},
  230. 									],
  231. 								};
  232. 							};
  233. 							
  234. 							return [
  235. 								getNode('Zoom In Limit', 'zoomInLimit', LIMITS.static, 500, 0),
  236. 								getNode('Zoom Out Limit', 'zoomOutLimit', LIMITS.static, 80),
  237. 								getNode('Pan Limit', 'panLimit', LIMITS.static, 50),
  238. 								{
  239. 									label: 'Snap Pan Limit',
  240. 									get: (_, configs) => ({snapPanLimit: Object.assign(...configs)}),
  241. 									children: ((hideId) => [
  242. 										{
  243. 											...typeNode,
  244. 											value: LIMITS.fit,
  245. 											options: [LIMITS.none, LIMITS.fit],
  246. 											onUpdate: (value) => ({hide: {[hideId]: value !== LIMITS.fit}}),
  247. 										},
  248. 										{...fitNode, value: 0, hideId},
  249. 									])(getHideId()),
  250. 								},
  251. 							];
  252. 						})(),
  253. 						{
  254. 							label: 'While Viewfinding',
  255. 							get: (_, configs) => {
  256. 								const {overlayKill, overlayHide, ...config} = Object.assign(...configs);
  257. 								
  258. 								return {
  259. 									active: {
  260. 										overlayRule: overlayKill && [overlayHide ? 'display' : 'pointer-events', 'none'],
  261. 										...config,
  262. 									},
  263. 								};
  264. 							},
  265. 							children: [
  266. 								{
  267. 									label: 'Pause Video?',
  268. 									value: false,
  269. 									get: ({value: pause}) => ({pause}),
  270. 								},
  271. 								{
  272. 									label: 'Hide Glow?',
  273. 									value: false,
  274. 									get: ({value: hideGlow}) => ({hideGlow}),
  275. 									hideId: glowHideId,
  276. 								},
  277. 								...((hideId) => [
  278. 									{
  279. 										label: 'Disable Overlay?',
  280. 										value: true,
  281. 										get: ({value: overlayKill}, configs) => Object.assign({overlayKill}, ...configs),
  282. 										onUpdate: (value) => ({hide: {[hideId]: !value}}),
  283. 										children: [
  284. 											{
  285. 												label: 'Hide Overlay?',
  286. 												value: false,
  287. 												get: ({value: overlayHide}) => ({overlayHide}),
  288. 												hideId,
  289. 											},
  290. 										],
  291. 									},
  292. 								])(getHideId()),
  293. 							],
  294. 						},
  295. 						
  296. 					],
  297. 				},
  298. 				{
  299. 					label: 'Glow',
  300. 					value: true,
  301. 					onUpdate: (value) => ({hide: {[glowHideId]: !value}}),
  302. 					get: ({value: on}, configs) => {
  303. 						if (!on) {
  304. 							return {};
  305. 						}
  306. 						
  307. 						const {turnover, ...config} = Object.assign(...configs);
  308. 						const sampleCount = Math.floor(config.fps * turnover);
  309. 						
  310. 						// avoid taking more samples than there's space for
  311. 						if (sampleCount > config.size) {
  312. 							const fps = config.size / turnover;
  313. 							
  314. 							return {
  315. 								glow: {
  316. 									...config,
  317. 									sampleCount: config.size,
  318. 									interval: 1000 / fps,
  319. 									fps,
  320. 								},
  321. 							};
  322. 						}
  323. 						
  324. 						return {
  325. 							glow: {
  326. 								...config,
  327. 								interval: 1000 / config.fps,
  328. 								sampleCount,
  329. 							},
  330. 						};
  331. 					},
  332. 					children: [
  333. 						(() => {
  334. 							const [seed, getChild] = (() => {
  335. 								const options = ['blur', 'brightness', 'contrast', 'drop-shadow', 'grayscale', 'hue-rotate', 'invert', 'opacity', 'saturate', 'sepia'];
  336. 								const ids = {};
  337. 								const hide = {};
  338. 								
  339. 								for (const option of options) {
  340. 									ids[option] = getHideId();
  341. 									
  342. 									hide[ids[option]] = true;
  343. 								}
  344. 								
  345. 								const min0Amount = {
  346. 									label: 'Amount (%)',
  347. 									value: 100,
  348. 									predicate: (value) => value >= 0 || 'Amount must be positive',
  349. 									inputAttributes: {min: 0},
  350. 								};
  351. 								
  352. 								const max100Amount = {
  353. 									label: 'Amount (%)',
  354. 									value: 0,
  355. 									predicate: (value) => {
  356. 										if (value < 0) {
  357. 											return 'Amount must be positive';
  358. 										}
  359. 										
  360. 										return value <= 100 || 'Amount may not exceed 100%';
  361. 									},
  362. 									inputAttributes: {min: 0, max: 100},
  363. 								};
  364. 								
  365. 								const getScaled = (value) => `calc(${value}px/var(${VAR_ZOOM}))`;
  366. 								
  367. 								const root = {
  368. 									label: 'Function',
  369. 									options,
  370. 									value: options[0],
  371. 									get: ({value}, configs) => {
  372. 										const config = Object.assign(...configs);
  373. 										
  374. 										switch (value) {
  375. 										case options[0]:
  376. 											return {
  377. 												filter: config.blurScale ? `blur(${config.blur}px)` : `blur(${getScaled(config.blur)})`,
  378. 												blur: {
  379. 													x: config.blur,
  380. 													y: config.blur,
  381. 													scale: config.blurScale,
  382. 												},
  383. 											};
  384. 										
  385. 										case options[3]:
  386. 											return {
  387. 												filter: config.shadowScale ?
  388. 													`drop-shadow(${config.shadow} ${config.shadowX}px ${config.shadowY}px ${config.shadowSpread}px)` :
  389. 													`drop-shadow(${config.shadow} ${getScaled(config.shadowX)} ${getScaled(config.shadowY)} ${getScaled(config.shadowSpread)})`,
  390. 												blur: {
  391. 													x: config.shadowSpread + Math.abs(config.shadowX),
  392. 													y: config.shadowSpread + Math.abs(config.shadowY),
  393. 													scale: config.shadowScale,
  394. 												},
  395. 											};
  396. 										
  397. 										case options[5]:
  398. 											return {filter: `hue-rotate(${config.hueRotate}deg)`};
  399. 										}
  400. 										
  401. 										return {filter: `${value}(${config[value]}%)`};
  402. 									},
  403. 									onUpdate: (value) => ({hide: {...hide, [ids[value]]: false}}),
  404. 								};
  405. 								
  406. 								const children = {
  407. 									'blur': [
  408. 										{
  409. 											label: 'Distance (px)',
  410. 											value: 0,
  411. 											get: ({value}) => ({blur: value}),
  412. 											predicate: (value) => value >= 0 || 'Distance must be positive',
  413. 											inputAttributes: {min: 0},
  414. 											hideId: ids.blur,
  415. 										},
  416. 										{
  417. 											label: 'Scale?',
  418. 											value: false,
  419. 											get: ({value}) => ({blurScale: value}),
  420. 											hideId: ids.blur,
  421. 										},
  422. 									],
  423. 									'brightness': [
  424. 										{
  425. 											...min0Amount,
  426. 											hideId: ids.brightness,
  427. 											get: ({value}) => ({brightness: value}),
  428. 										},
  429. 									],
  430. 									'contrast': [
  431. 										{
  432. 											...min0Amount,
  433. 											hideId: ids.contrast,
  434. 											get: ({value}) => ({contrast: value}),
  435. 										},
  436. 									],
  437. 									'drop-shadow': [
  438. 										{
  439. 											label: 'Colour',
  440. 											input: 'color',
  441. 											value: '#FFFFFF',
  442. 											get: ({value}) => ({shadow: value}),
  443. 											hideId: ids['drop-shadow'],
  444. 										},
  445. 										{
  446. 											label: 'Horizontal Offset (px)',
  447. 											value: 0,
  448. 											get: ({value}) => ({shadowX: value}),
  449. 											hideId: ids['drop-shadow'],
  450. 										},
  451. 										{
  452. 											label: 'Vertical Offset (px)',
  453. 											value: 0,
  454. 											get: ({value}) => ({shadowY: value}),
  455. 											hideId: ids['drop-shadow'],
  456. 										},
  457. 										{
  458. 											label: 'Spread (px)',
  459. 											value: 0,
  460. 											predicate: (value) => value >= 0 || 'Spread must be positive',
  461. 											inputAttributes: {min: 0},
  462. 											get: ({value}) => ({shadowSpread: value}),
  463. 											hideId: ids['drop-shadow'],
  464. 										},
  465. 										{
  466. 											label: 'Scale?',
  467. 											value: true,
  468. 											get: ({value}) => ({shadowScale: value}),
  469. 											hideId: ids['drop-shadow'],
  470. 										},
  471. 									],
  472. 									'grayscale': [
  473. 										{
  474. 											...max100Amount,
  475. 											hideId: ids.grayscale,
  476. 											get: ({value}) => ({grayscale: value}),
  477. 										},
  478. 									],
  479. 									'hue-rotate': [
  480. 										{
  481. 											label: 'Angle (deg)',
  482. 											value: 0,
  483. 											get: ({value}) => ({hueRotate: value}),
  484. 											hideId: ids['hue-rotate'],
  485. 										},
  486. 									],
  487. 									'invert': [
  488. 										{
  489. 											...max100Amount,
  490. 											hideId: ids.invert,
  491. 											get: ({value}) => ({invert: value}),
  492. 										},
  493. 									],
  494. 									'opacity': [
  495. 										{
  496. 											...max100Amount,
  497. 											value: 100,
  498. 											hideId: ids.opacity,
  499. 											get: ({value}) => ({opacity: value}),
  500. 										},
  501. 									],
  502. 									'saturate': [
  503. 										{
  504. 											...min0Amount,
  505. 											hideId: ids.saturate,
  506. 											get: ({value}) => ({saturate: value}),
  507. 										},
  508. 									],
  509. 									'sepia': [
  510. 										{
  511. 											...max100Amount,
  512. 											hideId: ids.sepia,
  513. 											get: ({value}) => ({sepia: value}),
  514. 										},
  515. 									],
  516. 								};
  517. 								
  518. 								return [
  519. 									{...root, children: Object.values(children).flat()}, (id, ...values) => {
  520. 										const replacements = [];
  521. 										
  522. 										for (const [i, child] of children[id].entries()) {
  523. 											replacements.push({...child, value: values[i]});
  524. 										}
  525. 										
  526. 										return {
  527. 											...root,
  528. 											value: id,
  529. 											children: Object.values({...children, [id]: replacements}).flat(),
  530. 										};
  531. 									},
  532. 								];
  533. 							})();
  534. 							
  535. 							return {
  536. 								label: 'Filter',
  537. 								get: (_, configs) => {
  538. 									const scaled = {x: 0, y: 0};
  539. 									const unscaled = {x: 0, y: 0};
  540. 									
  541. 									let filter = '';
  542. 									
  543. 									for (const config of configs) {
  544. 										filter += config.filter;
  545. 										
  546. 										if ('blur' in config) {
  547. 											const target = config.blur.scale ? scaled : unscaled;
  548. 											
  549. 											target.x = Math.max(target.x, config.blur.x);
  550. 											target.y = Math.max(target.y, config.blur.y);
  551. 										}
  552. 									}
  553. 									
  554. 									return {filter, blur: {scaled, unscaled}};
  555. 								},
  556. 								children: [
  557. 									getChild('saturate', 150),
  558. 									getChild('brightness', 150),
  559. 									getChild('blur', 25, false),
  560. 								],
  561. 								seed,
  562. 							};
  563. 						})(),
  564. 						{
  565. 							label: 'Update',
  566. 							childPredicate: ([{value: fps}, {value: turnover}]) => fps * turnover >= 1 || `${turnover} second turnover cannot be achieved at ${fps} hertz`,
  567. 							children: [
  568. 								{
  569. 									label: 'Frequency (Hz)',
  570. 									value: 15,
  571. 									predicate: (value) => {
  572. 										if (value > 144) {
  573. 											return 'Update frequency may not be above 144 hertz';
  574. 										}
  575. 										
  576. 										return value >= 0 || 'Update frequency must be positive';
  577. 									},
  578. 									inputAttributes: {min: 0, max: 144},
  579. 									get: ({value: fps}) => ({fps}),
  580. 								},
  581. 								{
  582. 									label: 'Turnover Time (s)',
  583. 									value: 3,
  584. 									predicate: (value) => value >= 0 || 'Turnover time must be positive',
  585. 									inputAttributes: {min: 0},
  586. 									get: ({value: turnover}) => ({turnover}),
  587. 								},
  588. 								{
  589. 									label: 'Reverse?',
  590. 									value: false,
  591. 									get: ({value: doFlip}) => ({doFlip}),
  592. 								},
  593. 							],
  594. 						},
  595. 						{
  596. 							label: 'Size (px)',
  597. 							value: 50,
  598. 							predicate: (value) => value >= 0 || 'Size must be positive',
  599. 							inputAttributes: {min: 0},
  600. 							get: ({value}) => ({size: value}),
  601. 						},
  602. 						{
  603. 							label: 'End Point (%)',
  604. 							value: 103,
  605. 							predicate: (value) => value >= 0 || 'End point must be positive',
  606. 							inputAttributes: {min: 0},
  607. 							get: ({value}) => ({end: value / 100}),
  608. 						},
  609. 					].map((node) => ({...node, hideId: glowHideId})),
  610. 				},
  611. 				{
  612. 					label: 'Interfaces',
  613. 					children: [
  614. 						{
  615. 							label: 'Crop',
  616. 							get: (_, configs) => ({crop: Object.assign(...configs)}),
  617. 							children: [
  618. 								{
  619. 									label: 'Colours',
  620. 									get: (_, configs) => ({colour: Object.assign(...configs)}),
  621. 									children: [
  622. 										{
  623. 											label: 'Fill',
  624. 											get: (_, [colour, opacity]) => ({fill: `${colour}${opacity}`}),
  625. 											children: [
  626. 												{
  627. 													label: 'Colour',
  628. 													value: '#808080',
  629. 													input: 'color',
  630. 													get: ({value}) => value,
  631. 												},
  632. 												{
  633. 													label: 'Opacity (%)',
  634. 													value: 40,
  635. 													predicate: (value) => {
  636. 														if (value < 0) {
  637. 															return 'Opacity must be positive';
  638. 														}
  639. 														
  640. 														return value <= 100 || 'Opacity may not exceed 100%';
  641. 													},
  642. 													inputAttributes: {min: 0, max: 100},
  643. 													get: ({value}) => Math.round(255 * value / 100).toString(16),
  644. 												},
  645. 											],
  646. 										},
  647. 										{
  648. 											label: 'Shadow',
  649. 											value: '#000000',
  650. 											input: 'color',
  651. 											get: ({value: shadow}) => ({shadow}),
  652. 										},
  653. 										{
  654. 											label: 'Border',
  655. 											value: '#ffffff',
  656. 											input: 'color',
  657. 											get: ({value: border}) => ({border}),
  658. 										},
  659. 									],
  660. 								},
  661. 								{
  662. 									label: 'Handle Size (%)',
  663. 									value: 6,
  664. 									predicate: (value) => {
  665. 										if (value < 0) {
  666. 											return 'Size must be positive';
  667. 										}
  668. 										
  669. 										return value <= 50 || 'Size may not exceed 50%';
  670. 									},
  671. 									inputAttributes: {min: 0, max: 50},
  672. 									get: ({value}) => ({handle: value / 100}),
  673. 								},
  674. 							],
  675. 						},
  676. 						{
  677. 							label: 'Crosshair',
  678. 							get: (value, configs) => ({crosshair: Object.assign(...configs)}),
  679. 							children: [
  680. 								{
  681. 									label: 'Outer Thickness (px)',
  682. 									value: 3,
  683. 									predicate: (value) => value >= 0 || 'Thickness must be positive',
  684. 									inputAttributes: {min: 0},
  685. 									get: ({value: outer}) => ({outer}),
  686. 								},
  687. 								{
  688. 									label: 'Inner Thickness (px)',
  689. 									value: 1,
  690. 									predicate: (value) => value >= 0 || 'Thickness must be positive',
  691. 									inputAttributes: {min: 0},
  692. 									get: ({value: inner}) => ({inner}),
  693. 								},
  694. 								{
  695. 									label: 'Inner Diameter (px)',
  696. 									value: 157,
  697. 									predicate: (value) => value >= 0 || 'Diameter must be positive',
  698. 									inputAttributes: {min: 0},
  699. 									get: ({value: gap}) => ({gap}),
  700. 								},
  701. 								((hideId) => ({
  702. 									label: 'Text',
  703. 									value: true,
  704. 									onUpdate: (value) => ({hide: {[hideId]: !value}}),
  705. 									get: ({value}, configs) => {
  706. 										if (!value) {
  707. 											return {};
  708. 										}
  709. 										
  710. 										const {translateX, translateY, ...config} = Object.assign(...configs);
  711. 										
  712. 										return {
  713. 											text: {
  714. 												translate: {
  715. 													x: translateX,
  716. 													y: translateY,
  717. 												},
  718. 												...config,
  719. 											},
  720. 										};
  721. 									},
  722. 									children: [
  723. 										{
  724. 											label: 'Font',
  725. 											value: '30px "Harlow Solid", cursive',
  726. 											predicate: isCSSRule.bind(null, 'font'),
  727. 											get: ({value: font}) => ({font}),
  728. 										},
  729. 										{
  730. 											label: 'Position (%)',
  731. 											get: (_, configs) => ({position: Object.assign(...configs)}),
  732. 											children: ['x', 'y'].map((label) => ({
  733. 												label,
  734. 												value: 0,
  735. 												predicate: (value) => Math.abs(value) <= 50 || 'Position must be on-screen',
  736. 												inputAttributes: {min: -50, max: 50},
  737. 												get: ({value}) => ({[label]: value + 50}),
  738. 											})),
  739. 										},
  740. 										{
  741. 											label: 'Offset (px)',
  742. 											get: (_, configs) => ({offset: Object.assign(...configs)}),
  743. 											children: [
  744. 												{
  745. 													label: 'x',
  746. 													value: -6,
  747. 													get: ({value: x}) => ({x}),
  748. 												},
  749. 												{
  750. 													label: 'y',
  751. 													value: -25,
  752. 													get: ({value: y}) => ({y}),
  753. 												},
  754. 											],
  755. 										},
  756. 										(() => {
  757. 											const options = ['Left', 'Center', 'Right'];
  758. 											
  759. 											return {
  760. 												label: 'Alignment',
  761. 												value: options[2],
  762. 												options,
  763. 												get: ({value}) => ({align: value.toLowerCase(), translateX: options.indexOf(value) * -50}),
  764. 											};
  765. 										})(),
  766. 										(() => {
  767. 											const options = ['Top', 'Middle', 'Bottom'];
  768. 											
  769. 											return {
  770. 												label: 'Baseline',
  771. 												value: options[0],
  772. 												options,
  773. 												get: ({value}) => ({translateY: options.indexOf(value) * -50}),
  774. 											};
  775. 										})(),
  776. 										{
  777. 											label: 'Line height (%)',
  778. 											value: 90,
  779. 											predicate: (value) => value >= 0 || 'Height must be positive',
  780. 											inputAttributes: {min: 0},
  781. 											get: ({value}) => ({height: value / 100}),
  782. 										},
  783. 									].map((node) => ({...node, hideId})),
  784. 								}))(getHideId()),
  785. 								{
  786. 									label: 'Colours',
  787. 									get: (_, configs) => ({colour: Object.assign(...configs)}),
  788. 									children: [
  789. 										{
  790. 											label: 'Fill',
  791. 											value: '#ffffff',
  792. 											input: 'color',
  793. 											get: ({value: fill}) => ({fill}),
  794. 										},
  795. 										{
  796. 											label: 'Shadow',
  797. 											value: '#000000',
  798. 											input: 'color',
  799. 											get: ({value: shadow}) => ({shadow}),
  800. 										},
  801. 									],
  802. 								},
  803. 							],
  804. 						},
  805. 					],
  806. 				},
  807. 			],
  808. 		};
  809. 	})(),
  810. 	{
  811. 		headBase: '#c80000',
  812. 		headButtonExit: '#000000',
  813. 		borderHead: '#ffffff',
  814. 		borderTooltip: '#c80000',
  815. 		width: Math.min(90, screen.width / 16),
  816. 		height: 90,
  817. 	},
  818. 	{
  819. 		zIndex: 10000,
  820. 		scrollbarColor: 'initial',
  821. 	},
  822. );
  823.  
  824. const CLASS_VIEWFINDER = 'viewfind-element';
  825. const PI_HALVES = [Math.PI / 2, Math.PI, 3 * Math.PI / 2, Math.PI * 2];
  826. const SELECTOR_VIDEO = '#movie_player video.html5-main-video';
  827.  
  828. // STATE
  829.  
  830. let video;
  831. let altTarget;
  832. let viewport;
  833. let cinematics;
  834.  
  835. let stopped = true;
  836. let stopDrag;
  837.  
  838. const viewportAngles = new function () {
  839. 	this.set = () => {
  840. 		this.side = getTheta(0, 0, viewport.clientWidth, viewport.clientHeight);
  841. 		
  842. 		// equals `getTheta(0, 0, viewport.clientHeight, viewport.clientWidth)`
  843. 		this.base = PI_HALVES[0] - this.side;
  844. 		
  845. 		glow.handleViewChange(true);
  846. 	};
  847. }();
  848.  
  849. // ROTATION HELPERS
  850.  
  851. const getTheta = (fromX, fromY, toX, toY) => Math.atan2(toY - fromY, toX - fromX);
  852.  
  853. const getRotatedCorners = (x, y) => {
  854. 	const angle = rotation.value - PI_HALVES[0];
  855. 	const radius = Math.sqrt(x * x + y * y);
  856. 	
  857. 	const topAngle = getTheta(0, 0, x, y) + angle;
  858. 	const bottomAngle = getTheta(0, 0, x, -y) + angle;
  859. 	
  860. 	return [
  861. 		{
  862. 			x: Math.abs(radius * Math.cos(topAngle)),
  863. 			y: Math.abs(radius * Math.sin(topAngle)),
  864. 		},
  865. 		{
  866. 			x: Math.abs(radius * Math.cos(bottomAngle)),
  867. 			y: Math.abs(radius * Math.sin(bottomAngle)),
  868. 		},
  869. 	];
  870. };
  871.  
  872. // CSS HELPER
  873.  
  874. const css = new function () {
  875. 	this.has = (name) => document.body.classList.contains(name);
  876. 	this.tag = (name, doAdd = true) => document.body.classList[doAdd ? 'add' : 'remove'](name);
  877. 	
  878. 	this.getSelector = (...classes) => `body.${classes.join('.')}`;
  879. 	
  880. 	const getSheet = () => {
  881. 		const element = document.createElement('style');
  882. 		
  883. 		document.head.appendChild(element);
  884. 		
  885. 		return element.sheet;
  886. 	};
  887. 	
  888. 	const getRuleString = (selector, ...declarations) => `${selector}{${declarations.map(([property, value]) => `${property}:${value};`).join('')}}`;
  889. 	
  890. 	this.add = function (...rule) {
  891. 		this.insertRule(getRuleString(...rule));
  892. 	}.bind(getSheet());
  893. 	
  894. 	this.Toggleable = class {
  895. 		static sheet = getSheet();
  896. 		
  897. 		static active = [];
  898. 		
  899. 		static id = 0;
  900. 		
  901. 		static add(rule, id) {
  902. 			this.sheet.insertRule(rule, this.active.length);
  903. 			
  904. 			this.active.push(id);
  905. 		}
  906. 		
  907. 		static remove(id) {
  908. 			let index = this.active.indexOf(id);
  909. 			
  910. 			while (index >= 0) {
  911. 				this.sheet.deleteRule(index);
  912. 				
  913. 				this.active.splice(index, 1);
  914. 				
  915. 				index = this.active.indexOf(id);
  916. 			}
  917. 		}
  918. 		
  919. 		id = this.constructor.id++;
  920. 		
  921. 		add(...rule) {
  922. 			this.constructor.add(getRuleString(...rule), this.id);
  923. 		}
  924. 		
  925. 		remove() {
  926. 			this.constructor.remove(this.id);
  927. 		}
  928. 	};
  929. }();
  930.  
  931. // ACTION MANAGER
  932.  
  933. const enabler = new function () {
  934. 	this.CLASS_ABLE = 'viewfind-action-able';
  935. 	this.CLASS_DRAGGING = 'viewfind-action-dragging';
  936. 	
  937. 	this.keys = new Set();
  938. 	
  939. 	this.didPause = false;
  940. 	this.isHidingGlow = false;
  941. 	
  942. 	this.setActive = (action) => {
  943. 		const {active, keys} = $config.get();
  944. 		
  945. 		if (active.hideGlow && Boolean(action) !== this.isHidingGlow) {
  946. 			if (action) {
  947. 				this.isHidingGlow = true;
  948. 				
  949. 				glow.hide();
  950. 			} else if (this.isHidingGlow) {
  951. 				this.isHidingGlow = false;
  952. 				
  953. 				glow.show();
  954. 			}
  955. 		}
  956. 		
  957. 		this.activeAction?.onInactive?.();
  958. 		
  959. 		if (action) {
  960. 			this.activeAction = action;
  961. 			this.toggled = keys[action.CODE].toggle;
  962. 			
  963. 			action.onActive?.();
  964. 			
  965. 			if (active.pause && !video.paused) {
  966. 				video.pause();
  967. 				
  968. 				this.didPause = true;
  969. 			}
  970. 			
  971. 			return;
  972. 		}
  973. 		
  974. 		if (this.didPause) {
  975. 			video.play();
  976. 			
  977. 			this.didPause = false;
  978. 		}
  979. 		
  980. 		this.activeAction = this.toggled = undefined;
  981. 	};
  982. 	
  983. 	this.handleChange = () => {
  984. 		if (stopped || stopDrag || video.ended) {
  985. 			return;
  986. 		}
  987. 		
  988. 		const {keys} = $config.get();
  989. 		
  990. 		let activeAction;
  991. 		
  992. 		for (const action of Object.values(actions)) {
  993. 			if (
  994. 				!this.keys.isSupersetOf(keys[action.CODE].keys) || activeAction && ('toggle' in keys[action.CODE] ?
  995. 					!('toggle' in keys[activeAction.CODE]) || keys[activeAction.CODE].keys.size >= keys[action.CODE].keys.size :
  996. 					!('toggle' in keys[activeAction.CODE]) && keys[activeAction.CODE].keys.size >= keys[action.CODE].keys.size)
  997. 			) {
  998. 				if ('CLASS_ABLE' in action) {
  999. 					css.tag(action.CLASS_ABLE, false);
  1000. 				}
  1001. 				
  1002. 				continue;
  1003. 			}
  1004. 			
  1005. 			if (activeAction && 'CLASS_ABLE' in activeAction) {
  1006. 				css.tag(activeAction.CLASS_ABLE, false);
  1007. 			}
  1008. 			
  1009. 			activeAction = action;
  1010. 		}
  1011. 		
  1012. 		if (activeAction === this.activeAction) {
  1013. 			return;
  1014. 		}
  1015. 		
  1016. 		if (activeAction) {
  1017. 			if ('CLASS_ABLE' in activeAction) {
  1018. 				css.tag(activeAction.CLASS_ABLE);
  1019. 				
  1020. 				css.tag(this.CLASS_ABLE);
  1021. 				
  1022. 				this.setActive(activeAction);
  1023. 				
  1024. 				return;
  1025. 			}
  1026. 			
  1027. 			this.activeAction?.onInactive?.();
  1028. 			
  1029. 			activeAction.onActive();
  1030. 			
  1031. 			this.activeAction = activeAction;
  1032. 		}
  1033. 		
  1034. 		css.tag(this.CLASS_ABLE, false);
  1035. 		
  1036. 		this.setActive(false);
  1037. 	};
  1038. 	
  1039. 	this.stop = () => {
  1040. 		css.tag(this.CLASS_ABLE, false);
  1041. 		
  1042. 		for (const action of Object.values(actions)) {
  1043. 			if ('CLASS_ABLE' in action) {
  1044. 				css.tag(action.CLASS_ABLE, false);
  1045. 			}
  1046. 		}
  1047. 		
  1048. 		this.setActive(false);
  1049. 	};
  1050. 	
  1051. 	this.updateConfig = (() => {
  1052. 		const rule = new css.Toggleable();
  1053. 		const selector = `${css.getSelector(this.CLASS_ABLE)} #contentContainer.tp-yt-app-drawer[swipe-open]::after`
  1054. 			+ `,${css.getSelector(this.CLASS_ABLE)} #movie_player > .html5-video-container ~ :not(.${CLASS_VIEWFINDER})`;
  1055. 		
  1056. 		return () => {
  1057. 			const {overlayRule} = $config.get().active;
  1058. 			
  1059. 			rule.remove();
  1060. 			
  1061. 			if (overlayRule) {
  1062. 				rule.add(selector, overlayRule);
  1063. 			}
  1064. 		};
  1065. 	})();
  1066. 	
  1067. 	$config.ready.then(() => {
  1068. 		this.updateConfig();
  1069. 	});
  1070. 	
  1071. 	// insertion order decides priority
  1072. 	css.add(`${css.getSelector(this.CLASS_DRAGGING)} #movie_player`, ['cursor', 'grabbing']);
  1073. 	css.add(`${css.getSelector(this.CLASS_ABLE)} #movie_player`, ['cursor', 'grab']);
  1074. }();
  1075.  
  1076. // ELEMENT CONTAINER SETUP
  1077.  
  1078. const containers = new function () {
  1079. 	for (const name of ['background', 'foreground', 'tracker']) {
  1080. 		this[name] = document.createElement('div');
  1081. 		
  1082. 		this[name].classList.add(CLASS_VIEWFINDER);
  1083. 	}
  1084. 	
  1085. 	// make an outline of the uncropped video
  1086. 	css.add(`${css.getSelector(enabler.CLASS_ABLE)} #${this.foreground.id = 'viewfind-outlined'}`, ['outline', '1px solid white']);
  1087. 	
  1088. 	this.background.style.position = this.foreground.style.position = 'absolute';
  1089. 	this.background.style.pointerEvents = this.foreground.style.pointerEvents = this.tracker.style.pointerEvents = 'none';
  1090. 	this.tracker.style.height = this.tracker.style.width = '100%';
  1091. }();
  1092.  
  1093. // MODIFIERS
  1094.  
  1095. class Cache {
  1096. 	targets = [];
  1097. 	
  1098. 	constructor(...targets) {
  1099. 		for (const source of targets) {
  1100. 			this.targets.push({source});
  1101. 		}
  1102. 	}
  1103. 	
  1104. 	update(target) {
  1105. 		return target.value !== (target.value = target.source.value);
  1106. 	}
  1107. 	
  1108. 	isStale() {
  1109. 		return this.targets.reduce((value, target) => value || this.update(target), false);
  1110. 	}
  1111. }
  1112.  
  1113. class ConfigCache extends Cache {
  1114. 	static id = 0;
  1115. 	
  1116. 	id = this.constructor.id;
  1117. 	
  1118. 	constructor(...targets) {
  1119. 		super(...targets);
  1120. 	}
  1121. 	
  1122. 	isStale() {
  1123. 		if (this.id === (this.id = this.constructor.id)) {
  1124. 			return super.isStale();
  1125. 		}
  1126. 		
  1127. 		for (const target of this.targets) {
  1128. 			target.value = target.source.value;
  1129. 		}
  1130. 		
  1131. 		return true;
  1132. 	}
  1133. }
  1134.  
  1135. const zoom = new function () {
  1136. 	this.value = 1;
  1137. 	
  1138. 	const scaleRule = new css.Toggleable();
  1139. 	
  1140. 	this.reset = () => {
  1141. 		this.value = 1;
  1142. 		
  1143. 		video.style.removeProperty('scale');
  1144. 		
  1145. 		scaleRule.remove();
  1146. 		scaleRule.add(':root', [VAR_ZOOM, '1']);
  1147. 	};
  1148. 	
  1149. 	this.apply = () => {
  1150. 		video.style.setProperty('scale', `${this.value}`);
  1151. 		
  1152. 		scaleRule.remove();
  1153. 		scaleRule.add(':root', [VAR_ZOOM, `${this.value}`]);
  1154. 		
  1155. 		delete actions.reset.restore;
  1156. 	};
  1157. 	
  1158. 	this.getFit = (width = 1, height = 1) => {
  1159. 		const [corner0, corner1] = getRotatedCorners(width * video.clientWidth, height * video.clientHeight);
  1160. 		
  1161. 		return 1 / Math.max(
  1162. 			corner0.x / viewport.clientWidth, corner1.x / viewport.clientWidth,
  1163. 			corner0.y / viewport.clientHeight, corner1.y / viewport.clientHeight,
  1164. 		);
  1165. 	};
  1166. 	
  1167. 	this.constrain = (() => {
  1168. 		const limitGetters = {
  1169. 			[LIMITS.static]: ({custom}) => custom,
  1170. 			[LIMITS.fit]: ({frame}, glow) => {
  1171. 				if (glow) {
  1172. 					const base = glow.end - 1;
  1173. 					const {scaled, unscaled} = glow.blur;
  1174. 					
  1175. 					return this.getFit(
  1176. 						1 + Math.max(0, base + Math.max(unscaled.x / video.clientWidth, scaled.x * this.value / video.clientWidth)) * frame,
  1177. 						1 + Math.max(0, base + Math.max(unscaled.y / video.clientHeight, scaled.y * this.value / video.clientHeight)) * frame,
  1178. 					);
  1179. 				}
  1180. 				
  1181. 				return this.getFit();
  1182. 			},
  1183. 		};
  1184. 		
  1185. 		return () => {
  1186. 			const {zoomOutLimit, zoomInLimit, glow} = $config.get();
  1187. 			
  1188. 			if (zoomOutLimit.type !== 'None') {
  1189. 				this.value = Math.max(limitGetters[zoomOutLimit.type](zoomOutLimit, glow), this.value);
  1190. 			}
  1191. 			
  1192. 			if (zoomInLimit.type !== 'None') {
  1193. 				this.value = Math.min(limitGetters[zoomInLimit.type](zoomInLimit, glow), this.value);
  1194. 			}
  1195. 			
  1196. 			this.apply();
  1197. 		};
  1198. 	})();
  1199. }();
  1200.  
  1201. const rotation = new function () {
  1202. 	this.value = PI_HALVES[0];
  1203. 	
  1204. 	this.reset = () => {
  1205. 		this.value = PI_HALVES[0];
  1206. 		
  1207. 		video.style.removeProperty('rotate');
  1208. 	};
  1209. 	
  1210. 	this.apply = () => {
  1211. 		// Conversion from anticlockwise rotation from the x-axis to clockwise rotation from the y-axis
  1212. 		video.style.setProperty('rotate', `${PI_HALVES[0] - this.value}rad`);
  1213. 		
  1214. 		delete actions.reset.restore;
  1215. 	};
  1216. 	
  1217. 	// dissimilar from other constrain functions in that no effective limit is applied
  1218. 	// -1.5π < rotation <= 0.5π
  1219. 	// 0 <= 0.5π - rotation < 2π
  1220. 	this.constrain = () => {
  1221. 		this.value %= PI_HALVES[3];
  1222. 		
  1223. 		if (this.value > PI_HALVES[0]) {
  1224. 			this.value -= PI_HALVES[3];
  1225. 		} else if (this.value <= -PI_HALVES[2]) {
  1226. 			this.value += PI_HALVES[3];
  1227. 		}
  1228. 		
  1229. 		this.apply();
  1230. 	};
  1231. }();
  1232.  
  1233. const position = new function () {
  1234. 	this.x = this.y = 0;
  1235. 	
  1236. 	this.getValues = () => ({x: this.x, y: this.y});
  1237. 	
  1238. 	this.reset = () => {
  1239. 		this.x = this.y = 0;
  1240. 		
  1241. 		video.style.removeProperty('translate');
  1242. 	};
  1243. 	
  1244. 	this.apply = () => {
  1245. 		video.style.setProperty('transform-origin', `${(0.5 + this.x) * 100}% ${(0.5 - this.y) * 100}%`);
  1246. 		video.style.setProperty('translate', `${-this.x * 100}% ${this.y * 100}%`);
  1247. 		
  1248. 		delete actions.reset.restore;
  1249. 	};
  1250. 	
  1251. 	this.constrain = (() => {
  1252. 		const applyFrameValues = (lowCorner, highCorner, sub, main) => {
  1253. 			this[sub] = Math.max(-lowCorner[sub], Math.min(highCorner[sub], this[sub]));
  1254. 			
  1255. 			const progress = (this[sub] + lowCorner[sub]) / (highCorner[sub] + lowCorner[sub]);
  1256. 			
  1257. 			if (this[main] < 0) {
  1258. 				const bound = Number.isNaN(progress) ?
  1259. 					-lowCorner[main] :
  1260. 					(lowCorner[main] - highCorner[main]) * progress - lowCorner[main];
  1261. 				
  1262. 				this[main] = Math.max(this[main], bound);
  1263. 			} else {
  1264. 				const bound = Number.isNaN(progress) ?
  1265. 					lowCorner[main] :
  1266. 					(highCorner[main] - lowCorner[main]) * progress + lowCorner[main];
  1267. 				
  1268. 				this[main] = Math.min(this[main], bound);
  1269. 			}
  1270. 		};
  1271. 		
  1272. 		const applyFrame = (firstCorner, secondCorner, firstCornerAngle, secondCornerAngle) => {
  1273. 			// The anti-clockwise angle from the first (top left) corner
  1274. 			const midPointAngle = (getTheta(0, 0, this.x, this.y) + PI_HALVES[1] + firstCornerAngle) % PI_HALVES[3];
  1275. 			
  1276. 			if (midPointAngle % PI_HALVES[1] < secondCornerAngle) {
  1277. 				// Frame is x-bound
  1278. 				const [lowCorner, highCorner] = this.x >= 0 ? [firstCorner, secondCorner] : [secondCorner, firstCorner];
  1279. 				
  1280. 				applyFrameValues(lowCorner, highCorner, 'y', 'x');
  1281. 			} else {
  1282. 				// Frame is y-bound
  1283. 				const [lowCorner, highCorner] = this.y >= 0 ? [firstCorner, secondCorner] : [secondCorner, firstCorner];
  1284. 				
  1285. 				applyFrameValues(lowCorner, highCorner, 'x', 'y');
  1286. 			}
  1287. 		};
  1288. 		
  1289. 		const getBoundApplyFrame = (() => {
  1290. 			const getCorner = (first, second) => {
  1291. 				if (zoom.value < first.z) {
  1292. 					return {x: 0, y: 0};
  1293. 				}
  1294. 				
  1295. 				if (zoom.value < second.z) {
  1296. 					const progress = (1 / zoom.value - 1 / first.z) / (1 / second.z - 1 / first.z);
  1297. 					
  1298. 					return {
  1299. 						x: Math.max(0, progress * (second.x - first.x) + first.x),
  1300. 						y: Math.max(0, progress * (second.y - first.y) + first.y),
  1301. 					};
  1302. 				}
  1303. 				
  1304. 				return {
  1305. 					x: Math.max(0, 0.5 - (0.5 - second.x) / (zoom.value / second.z)),
  1306. 					y: Math.max(0, 0.5 - (0.5 - second.y) / (zoom.value / second.z)),
  1307. 				};
  1308. 			};
  1309. 			
  1310. 			return (first0, second0, first1, second1) => {
  1311. 				const fFirstCorner = getCorner(first0, second0);
  1312. 				const fSecondCorner = getCorner(first1, second1);
  1313. 				
  1314. 				const fFirstCornerAngle = getTheta(0, 0, fFirstCorner.x, fFirstCorner.y);
  1315. 				const fSecondCornerAngle = fFirstCornerAngle + getTheta(0, 0, fSecondCorner.x, fSecondCorner.y);
  1316. 				
  1317. 				for (const [same, different] of [['x', 'y'], ['y', 'x']]) {
  1318. 					if (fFirstCorner[same] === 0 && fSecondCorner[same] === 0) {
  1319. 						if (fFirstCorner[different] > fSecondCorner[different]) {
  1320. 							return applyFrame.bind(null, fFirstCorner, fFirstCorner, fFirstCornerAngle, fFirstCornerAngle);
  1321. 						}
  1322. 						
  1323. 						return applyFrame.bind(null, fSecondCorner, fSecondCorner, fSecondCornerAngle, fSecondCornerAngle);
  1324. 					}
  1325. 				}
  1326. 				
  1327. 				return applyFrame.bind(null, fFirstCorner, fSecondCorner, fFirstCornerAngle, fSecondCornerAngle);
  1328. 			};
  1329. 		})();
  1330. 		
  1331. 		// https://math.stackexchange.com/questions/2223691/intersect-2-lines-at-the-same-ratio-through-a-point
  1332. 		const snapZoom = (() => {
  1333. 			const isAbove = (x, y, m, c) => m * x + c < y;
  1334. 			
  1335. 			const getPSecond = (low, high) => 1 - low / high;
  1336. 			const getPFirst = (low, high, target) => (target - low) / (high - low);
  1337. 			
  1338. 			const getProgressed = (p, [fromX, fromY], [toX, toY]) => [p * (toX - fromX) + fromX, p * (toY - fromY) + fromY];
  1339. 			
  1340. 			const getFlipped = (first, second, flipX, flipY) => {
  1341. 				const flippedFirst = [];
  1342. 				const flippedSecond = [];
  1343. 				const corner = [];
  1344. 				
  1345. 				if (flipX) {
  1346. 					flippedFirst[0] = -first.x;
  1347. 					flippedSecond[0] = -second.x;
  1348. 					corner[0] = -0.5;
  1349. 				} else {
  1350. 					flippedFirst[0] = first.x;
  1351. 					flippedSecond[0] = second.x;
  1352. 					corner[0] = 0.5;
  1353. 				}
  1354. 				
  1355. 				if (flipY) {
  1356. 					flippedFirst[1] = -first.y;
  1357. 					flippedSecond[1] = -second.y;
  1358. 					corner[1] = -0.5;
  1359. 				} else {
  1360. 					flippedFirst[1] = first.y;
  1361. 					flippedSecond[1] = second.y;
  1362. 					corner[1] = 0.5;
  1363. 				}
  1364. 				
  1365. 				return [flippedFirst, flippedSecond, corner];
  1366. 			};
  1367. 			
  1368. 			const getIntersectPSecond = ([[g, e], [f, d]], [[k, i], [j, h]], doFlip) => {
  1369. 				const x = Math.abs(position.x);
  1370. 				const y = Math.abs(position.y);
  1371. 				
  1372. 				const a = d * j - d * k - j * e + e * k - h * f + h * g + i * f - i * g;
  1373. 				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;
  1374. 				const c = k * e - e * x - k * y - g * i + i * x + g * y;
  1375. 				
  1376. 				return (doFlip ? -b - Math.sqrt(b * b - 4 * a * c) : -b + Math.sqrt(b * b - 4 * a * c)) / (2 * a);
  1377. 			};
  1378. 			
  1379. 			const applyZoomPairSecond = ([z, ...pair], doFlip) => {
  1380. 				const p = getIntersectPSecond(...pair, doFlip);
  1381. 				
  1382. 				if (p >= 0) {
  1383. 					zoom.value = p >= 1 ? Number.MAX_SAFE_INTEGER : z / (1 - p);
  1384. 					
  1385. 					return true;
  1386. 				}
  1387. 				
  1388. 				return false;
  1389. 			};
  1390. 			
  1391. 			const applyZoomPairFirst = ([z0, z1, ...pair], doFlip) => {
  1392. 				const p = getIntersectPSecond(...pair, doFlip);
  1393. 				
  1394. 				if (p >= 0) {
  1395. 					zoom.value = p * (z1 - z0) + z0;
  1396. 					
  1397. 					return true;
  1398. 				}
  1399. 				
  1400. 				return false;
  1401. 			};
  1402. 			
  1403. 			return (first0, second0, first1, second1) => {
  1404. 				const getPairings = (flipX0, flipY0, flipX1, flipY1) => {
  1405. 					const [flippedFirst0, flippedSecond0, corner0] = getFlipped(first0, second0, flipX0, flipY0);
  1406. 					const [flippedFirst1, flippedSecond1, corner1] = getFlipped(first1, second1, flipX1, flipY1);
  1407. 					
  1408. 					if (second0.z > second1.z) {
  1409. 						const progressedHigh = getProgressed(getPSecond(second1.z, second0.z), flippedSecond1, corner1);
  1410. 						const pairHigh = [
  1411. 							second0.z,
  1412. 							[flippedSecond0, corner0],
  1413. 							[progressedHigh, corner1],
  1414. 						];
  1415. 						
  1416. 						if (second1.z > first0.z) {
  1417. 							const progressedLow = getProgressed(getPFirst(first0.z, second0.z, second1.z), flippedFirst0, flippedSecond0);
  1418. 							
  1419. 							return [
  1420. 								pairHigh,
  1421. 								[
  1422. 									second1.z,
  1423. 									second0.z,
  1424. 									[progressedLow, flippedSecond0],
  1425. 									[flippedSecond1, progressedHigh],
  1426. 								],
  1427. 							];
  1428. 						}
  1429. 						
  1430. 						const progressedLow = getProgressed(getPSecond(second1.z, first0.z), flippedSecond1, corner1);
  1431. 						
  1432. 						return [
  1433. 							pairHigh,
  1434. 							[
  1435. 								first0.z,
  1436. 								second0.z,
  1437. 								[flippedFirst0, flippedSecond0],
  1438. 								[progressedLow, progressedHigh],
  1439. 							],
  1440. 						];
  1441. 					}
  1442. 					
  1443. 					const progressedHigh = getProgressed(getPSecond(second0.z, second1.z), flippedSecond0, corner0);
  1444. 					const pairHigh = [
  1445. 						second1.z,
  1446. 						[progressedHigh, corner0],
  1447. 						[flippedSecond1, corner1],
  1448. 					];
  1449. 					
  1450. 					if (second0.z > first1.z) {
  1451. 						const progressedLow = getProgressed(getPFirst(first1.z, second1.z, second0.z), flippedFirst1, flippedSecond1);
  1452. 						
  1453. 						return [
  1454. 							pairHigh,
  1455. 							[
  1456. 								second0.z,
  1457. 								second1.z,
  1458. 								[progressedLow, flippedSecond1],
  1459. 								[flippedSecond0, progressedHigh],
  1460. 							],
  1461. 						];
  1462. 					}
  1463. 					
  1464. 					const progressedLow = getProgressed(getPSecond(second0.z, first1.z), flippedSecond0, corner0);
  1465. 					
  1466. 					return [
  1467. 						pairHigh,
  1468. 						[
  1469. 							first1.z,
  1470. 							second1.z,
  1471. 							[flippedFirst1, flippedSecond1],
  1472. 							[progressedLow, progressedHigh],
  1473. 						],
  1474. 					];
  1475. 				};
  1476. 				
  1477. 				const [pair0, pair1, doFlip = false] = (() => {
  1478. 					const doInvert = position.x >= 0 === position.y < 0;
  1479. 					
  1480. 					if (doInvert) {
  1481. 						const m = (second0.y - 0.5) / (second0.x - 0.5);
  1482. 						const c = 0.5 - m * 0.5;
  1483. 						
  1484. 						if (isAbove(Math.abs(position.x), Math.abs(position.y), m, c)) {
  1485. 							return [...getPairings(false, false, true, false), true];
  1486. 						}
  1487. 						
  1488. 						return getPairings(false, false, false, true);
  1489. 					}
  1490. 					
  1491. 					const m = (second1.y - 0.5) / (second1.x - 0.5);
  1492. 					const c = 0.5 - m * 0.5;
  1493. 					
  1494. 					if (isAbove(Math.abs(position.x), Math.abs(position.y), m, c)) {
  1495. 						return getPairings(true, false, false, false);
  1496. 					}
  1497. 					
  1498. 					return [...getPairings(false, true, false, false), true];
  1499. 				})();
  1500. 				
  1501. 				if (applyZoomPairSecond(pair0, doFlip) || applyZoomPairFirst(pair1, doFlip)) {
  1502. 					return;
  1503. 				}
  1504. 				
  1505. 				zoom.value = pair1[0];
  1506. 			};
  1507. 		})();
  1508. 		
  1509. 		const getZoomPoints = (mod) => {
  1510. 			const [videoWidth, videoHeight] = (() => {
  1511. 				const {glow} = $config.get();
  1512. 				
  1513. 				if (glow) {
  1514. 					const {scaled, unscaled} = glow.blur;
  1515. 					
  1516. 					return [
  1517. 						(video.clientWidth + Math.max(0, glow.end * video.clientWidth - video.clientWidth + Math.max(unscaled.x, scaled.x * zoom.value)) * mod) / 2,
  1518. 						(video.clientHeight + Math.max(0, glow.end * video.clientHeight - video.clientHeight + Math.max(unscaled.y, scaled.y * zoom.value)) * mod) / 2,
  1519. 					];
  1520. 				}
  1521. 				
  1522. 				return [video.clientWidth / 2, video.clientHeight / 2];
  1523. 			})();
  1524. 			
  1525. 			const viewportWidth = viewport.clientWidth / 2;
  1526. 			const viewportHeight = viewport.clientHeight / 2;
  1527. 			
  1528. 			const quadrant = Math.floor(rotation.value / PI_HALVES[0]) + 3;
  1529. 			
  1530. 			// the angle from 0,0 to the center of the video edge angled towards the viewport's upper-right corner
  1531. 			const quadrantAngle = (() => {
  1532. 				const angle = (rotation.value + PI_HALVES[3]) % PI_HALVES[0];
  1533. 				
  1534. 				return quadrant % 2 === 0 ? angle : PI_HALVES[0] - angle;
  1535. 			})();
  1536. 			
  1537. 			const progress = quadrantAngle / PI_HALVES[0] * -2 + 1;
  1538. 			
  1539. 			const progressAngles = {
  1540. 				base: Math.atan(progress * viewportWidth / viewportHeight),
  1541. 				side: Math.atan(progress * viewportHeight / viewportWidth),
  1542. 			};
  1543. 			
  1544. 			const progressCosines = {
  1545. 				base: Math.cos(progressAngles.base),
  1546. 				side: Math.cos(progressAngles.side),
  1547. 			};
  1548. 			
  1549. 			const [baseCorners, sideCorners] = [
  1550. 				[
  1551. 					((cornerAngle) => ({
  1552. 						x: (videoWidth - videoHeight * Math.tan(cornerAngle)) / video.clientWidth,
  1553. 						y: 0,
  1554. 						z: viewportHeight / (progressCosines.base * Math.abs(videoHeight / Math.cos(cornerAngle))),
  1555. 					}))(progressAngles.base + quadrantAngle),
  1556. 					
  1557. 					((cornerAngle) => ({
  1558. 						x: 0,
  1559. 						y: (videoHeight - videoWidth * Math.tan(cornerAngle)) / video.clientHeight,
  1560. 						z: viewportHeight / (progressCosines.base * Math.abs(videoWidth / Math.cos(cornerAngle))),
  1561. 					}))(PI_HALVES[0] - progressAngles.base - quadrantAngle),
  1562. 				],
  1563. 				[
  1564. 					((cornerAngle) => ({
  1565. 						x: 0,
  1566. 						y: (videoHeight - videoWidth * Math.tan(cornerAngle)) / video.clientHeight,
  1567. 						z: viewportWidth / (progressCosines.side * Math.abs(videoWidth / Math.cos(cornerAngle))),
  1568. 					}))(progressAngles.side + quadrantAngle),
  1569. 					
  1570. 					((cornerAngle) => ({
  1571. 						x: (videoWidth - videoHeight * Math.tan(cornerAngle)) / video.clientWidth,
  1572. 						y: 0,
  1573. 						z: viewportWidth / (progressCosines.side * Math.abs(videoHeight / Math.cos(cornerAngle))),
  1574. 					}))(PI_HALVES[0] - progressAngles.side - quadrantAngle),
  1575. 				],
  1576. 			// ascending order by zoom
  1577. 			].map(([xCorner, yCorner]) => xCorner.z < yCorner.z ? [xCorner, yCorner] : [yCorner, xCorner]);
  1578. 			
  1579. 			return quadrant % 2 === 1 ? [...baseCorners, ...sideCorners] : [...sideCorners, ...baseCorners];
  1580. 		};
  1581. 		
  1582. 		const handlers = {
  1583. 			[LIMITS.static]: ({custom: ratio}) => {
  1584. 				const bound = 0.5 + (ratio - 0.5) / zoom.value;
  1585. 				
  1586. 				position.x = Math.max(-bound, Math.min(bound, position.x));
  1587. 				position.y = Math.max(-bound, Math.min(bound, position.y));
  1588. 			},
  1589. 			[LIMITS.fit]: (() => {
  1590. 				const cache = new ConfigCache(rotation, zoom);
  1591. 				
  1592. 				let boundApplyFrame;
  1593. 				
  1594. 				return ({frame}) => {
  1595. 					if (cache.isStale()) {
  1596. 						boundApplyFrame = getBoundApplyFrame(...getZoomPoints(frame));
  1597. 					}
  1598. 					
  1599. 					boundApplyFrame();
  1600. 				};
  1601. 			})(),
  1602. 		};
  1603. 		
  1604. 		const snapHandlers = {
  1605. 			[LIMITS.fit]: (() => {
  1606. 				const cache = new ConfigCache(rotation, zoom);
  1607. 				
  1608. 				let boundSnapZoom;
  1609. 				
  1610. 				return ({frame}) => {
  1611. 					if (cache.isStale()) {
  1612. 						boundSnapZoom = snapZoom.bind(null, ...getZoomPoints(frame));
  1613. 					}
  1614. 					
  1615. 					boundSnapZoom();
  1616. 					
  1617. 					zoom.constrain();
  1618. 				};
  1619. 			})(),
  1620. 		};
  1621. 		
  1622. 		return (doZoom = false) => {
  1623. 			const {panLimit, snapPanLimit} = $config.get();
  1624. 			
  1625. 			if (doZoom) {
  1626. 				snapHandlers[snapPanLimit.type]?.(snapPanLimit);
  1627. 			}
  1628. 			
  1629. 			handlers[panLimit.type]?.(panLimit);
  1630. 			
  1631. 			this.apply();
  1632. 		};
  1633. 	})();
  1634. }();
  1635.  
  1636. const crop = new function () {
  1637. 	this.top = this.right = this.bottom = this.left = 0;
  1638. 	
  1639. 	this.getValues = () => ({top: this.top, right: this.right, bottom: this.bottom, left: this.left});
  1640. 	
  1641. 	this.reveal = () => {
  1642. 		this.top = this.right = this.bottom = this.left = 0;
  1643. 		
  1644. 		rule.remove();
  1645. 	};
  1646. 	
  1647. 	this.reset = () => {
  1648. 		this.reveal();
  1649. 		
  1650. 		actions.crop.reset();
  1651. 	};
  1652. 	
  1653. 	const rule = new css.Toggleable();
  1654. 	
  1655. 	this.apply = () => {
  1656. 		rule.remove();
  1657. 		rule.add(
  1658. 			`${SELECTOR_VIDEO}:not(.${this.CLASS_ABLE} *)`,
  1659. 			['clip-path', `inset(${this.top * 100}% ${this.right * 100}% ${this.bottom * 100}% ${this.left * 100}%)`],
  1660. 		);
  1661. 		
  1662. 		delete actions.reset.restore;
  1663. 		
  1664. 		glow.handleViewChange();
  1665. 		glow.reset();
  1666. 	};
  1667. 	
  1668. 	this.getDimensions = (width = video.clientWidth, height = video.clientHeight) => [
  1669. 		width * (1 - this.left - this.right),
  1670. 		height * (1 - this.top - this.bottom),
  1671. 	];
  1672. }();
  1673.  
  1674. // FUNCTIONALITY
  1675.  
  1676. const glow = (() => {
  1677. 	const videoCanvas = new OffscreenCanvas(0, 0);
  1678. 	const videoCtx = videoCanvas.getContext('2d', {alpha: false});
  1679. 	
  1680. 	const glowCanvas = document.createElement('canvas');
  1681. 	const glowCtx = glowCanvas.getContext('2d', {alpha: false});
  1682. 	
  1683. 	glowCanvas.style.setProperty('position', 'absolute');
  1684. 	
  1685. 	class Sector {
  1686. 		canvas = new OffscreenCanvas(0, 0);
  1687. 		ctx = this.canvas.getContext('2d', {alpha: false});
  1688. 		
  1689. 		update(doFill) {
  1690. 			if (doFill) {
  1691. 				this.fill();
  1692. 			} else {
  1693. 				this.shift();
  1694. 				this.take();
  1695. 			}
  1696. 			
  1697. 			this.giveEdge();
  1698. 			
  1699. 			if (this.hasCorners) {
  1700. 				this.giveCorners();
  1701. 			}
  1702. 		}
  1703. 	}
  1704. 	
  1705. 	class Side extends Sector {
  1706. 		setDimensions(doShiftRight, sWidth, sHeight, sx, sy, dx, dy, dWidth, dHeight) {
  1707. 			this.canvas.width = sWidth;
  1708. 			this.canvas.height = sHeight;
  1709. 			
  1710. 			this.shift = this.ctx.drawImage.bind(this.ctx, this.canvas, doShiftRight ? 1 : -1, 0);
  1711. 			
  1712. 			this.fill = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, 1, sHeight, 0, 0, sWidth, sHeight);
  1713. 			this.take = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, 1, sHeight, doShiftRight ? 0 : sWidth - 1, 0, 1, sHeight);
  1714. 			
  1715. 			this.giveEdge = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, sWidth, sHeight, dx, dy, dWidth, dHeight);
  1716. 			
  1717. 			if (dy === 0) {
  1718. 				this.hasCorners = false;
  1719. 				
  1720. 				return;
  1721. 			}
  1722. 			
  1723. 			this.hasCorners = true;
  1724. 			
  1725. 			const giveCorner0 = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, sWidth, 1, dx, 0, dWidth, dy);
  1726. 			const giveCorner1 = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, sHeight - 1, sWidth, 1, dx, dy + dHeight, dWidth, dy);
  1727. 			
  1728. 			this.giveCorners = () => {
  1729. 				giveCorner0();
  1730. 				giveCorner1();
  1731. 			};
  1732. 		}
  1733. 	}
  1734. 	
  1735. 	class Base extends Sector {
  1736. 		setDimensions(doShiftDown, sWidth, sHeight, sx, sy, dx, dy, dWidth, dHeight) {
  1737. 			this.canvas.width = sWidth;
  1738. 			this.canvas.height = sHeight;
  1739. 			
  1740. 			this.shift = this.ctx.drawImage.bind(this.ctx, this.canvas, 0, doShiftDown ? 1 : -1);
  1741. 			
  1742. 			this.fill = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, sWidth, 1, 0, 0, sWidth, sHeight);
  1743. 			this.take = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, sWidth, 1, 0, doShiftDown ? 0 : sHeight - 1, sWidth, 1);
  1744. 			
  1745. 			this.giveEdge = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, sWidth, sHeight, dx, dy, dWidth, dHeight);
  1746. 			
  1747. 			if (dx === 0) {
  1748. 				this.hasCorners = false;
  1749. 				
  1750. 				return;
  1751. 			}
  1752. 			
  1753. 			this.hasCorners = true;
  1754. 			
  1755. 			const giveCorner0 = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, 1, sHeight, 0, dy, dx, dHeight);
  1756. 			const giveCorner1 = glowCtx.drawImage.bind(glowCtx, this.canvas, sWidth - 1, 0, 1, sHeight, dx + dWidth, dy, dx, dHeight);
  1757. 			
  1758. 			this.giveCorners = () => {
  1759. 				giveCorner0();
  1760. 				giveCorner1();
  1761. 			};
  1762. 		}
  1763. 		
  1764. 		setClipPath(points) {
  1765. 			this.clipPath = new Path2D();
  1766. 			
  1767. 			this.clipPath.moveTo(...points[0]);
  1768. 			this.clipPath.lineTo(...points[1]);
  1769. 			this.clipPath.lineTo(...points[2]);
  1770. 			this.clipPath.closePath();
  1771. 		}
  1772. 		
  1773. 		update(doFill) {
  1774. 			glowCtx.save();
  1775. 			
  1776. 			glowCtx.clip(this.clipPath);
  1777. 			
  1778. 			super.update(doFill);
  1779. 			
  1780. 			glowCtx.restore();
  1781. 		}
  1782. 	}
  1783. 	
  1784. 	const components = {
  1785. 		left: new Side(),
  1786. 		right: new Side(),
  1787. 		top: new Base(),
  1788. 		bottom: new Base(),
  1789. 	};
  1790. 	
  1791. 	const setComponentDimensions = (sampleCount, size, isInset, doFlip) => {
  1792. 		const [croppedWidth, croppedHeight] = crop.getDimensions();
  1793. 		const halfCanvas = {x: Math.ceil(glowCanvas.width / 2), y: Math.ceil(glowCanvas.height / 2)};
  1794. 		const halfVideo = {x: croppedWidth / 2, y: croppedHeight / 2};
  1795. 		const dWidth = Math.ceil(Math.min(halfVideo.x, size));
  1796. 		const dHeight = Math.ceil(Math.min(halfVideo.y, size));
  1797. 		const [dWidthScale, dHeightScale, sideWidth, sideHeight] = isInset ?
  1798. 			[0, 0, videoCanvas.width / croppedWidth * glowCanvas.width, videoCanvas.height / croppedHeight * glowCanvas.height] :
  1799. 			[halfCanvas.x - halfVideo.x, halfCanvas.y - halfVideo.y, croppedWidth, croppedHeight];
  1800. 		
  1801. 		components.left.setDimensions(!doFlip, sampleCount, videoCanvas.height, 0, 0, 0, dHeightScale, dWidth, sideHeight);
  1802. 		
  1803. 		components.right.setDimensions(doFlip, sampleCount, videoCanvas.height, videoCanvas.width - 1, 0, glowCanvas.width - dWidth, dHeightScale, dWidth, sideHeight);
  1804. 		
  1805. 		components.top.setDimensions(!doFlip, videoCanvas.width, sampleCount, 0, 0, dWidthScale, 0, sideWidth, dHeight);
  1806. 		components.top.setClipPath([[0, 0], [halfCanvas.x, halfCanvas.y], [glowCanvas.width, 0]]);
  1807. 		
  1808. 		components.bottom.setDimensions(doFlip, videoCanvas.width, sampleCount, 0, videoCanvas.height - 1, dWidthScale, glowCanvas.height - dHeight, sideWidth, dHeight);
  1809. 		components.bottom.setClipPath([[0, glowCanvas.height], [halfCanvas.x, halfCanvas.y], [glowCanvas.width, glowCanvas.height]]);
  1810. 	};
  1811. 	
  1812. 	class Instance {
  1813. 		constructor() {
  1814. 			const {filter, sampleCount, size, end, doFlip} = $config.get().glow;
  1815. 			
  1816. 			// Setup canvases
  1817. 			
  1818. 			glowCanvas.style.setProperty('filter', filter);
  1819. 			
  1820. 			[glowCanvas.width, glowCanvas.height] = crop.getDimensions().map((dimension) => dimension * end);
  1821. 			
  1822. 			glowCanvas.style.setProperty('left', `${crop.left * 100 + (1 - end) * (1 - crop.left - crop.right) * 50}%`);
  1823. 			glowCanvas.style.setProperty('top', `${crop.top * 100 + (1 - end) * (1 - crop.top - crop.bottom) * 50}%`);
  1824. 			
  1825. 			[videoCanvas.width, videoCanvas.height] = crop.getDimensions(video.videoWidth, video.videoHeight);
  1826. 			
  1827. 			setComponentDimensions(sampleCount, size, end <= 1, doFlip);
  1828. 			
  1829. 			this.update(true);
  1830. 		}
  1831. 		
  1832. 		update(doFill = false) {
  1833. 			videoCtx.drawImage(
  1834. 				video,
  1835. 				crop.left * video.videoWidth,
  1836. 				crop.top * video.videoHeight,
  1837. 				video.videoWidth * (1 - crop.left - crop.right),
  1838. 				video.videoHeight * (1 - crop.top - crop.bottom),
  1839. 				0,
  1840. 				0,
  1841. 				videoCanvas.width,
  1842. 				videoCanvas.height,
  1843. 			);
  1844. 			
  1845. 			components.left.update(doFill);
  1846. 			components.right.update(doFill);
  1847. 			components.top.update(doFill);
  1848. 			components.bottom.update(doFill);
  1849. 		}
  1850. 	}
  1851. 	
  1852. 	return new function () {
  1853. 		const container = document.createElement('div');
  1854. 		
  1855. 		container.style.display = 'none';
  1856. 		
  1857. 		container.appendChild(glowCanvas);
  1858. 		containers.background.appendChild(container);
  1859. 		
  1860. 		this.isHidden = false;
  1861. 		
  1862. 		let instance, startCopyLoop, stopCopyLoop;
  1863. 		
  1864. 		const play = () => {
  1865. 			if (!video.paused && !this.isHidden && !enabler.isHidingGlow) {
  1866. 				startCopyLoop?.();
  1867. 			}
  1868. 		};
  1869. 		
  1870. 		const fill = () => {
  1871. 			if (!this.isHidden) {
  1872. 				instance.update(true);
  1873. 			}
  1874. 		};
  1875. 		
  1876. 		const handleVisibilityChange = () => {
  1877. 			if (document.hidden) {
  1878. 				stopCopyLoop();
  1879. 			} else {
  1880. 				play();
  1881. 			}
  1882. 		};
  1883. 		
  1884. 		this.handleSizeChange = () => {
  1885. 			instance = new Instance();
  1886. 		};
  1887. 		
  1888. 		// set up pausing if glow isn't visible
  1889. 		this.handleViewChange = (() => {
  1890. 			const cache = new Cache(rotation, zoom);
  1891. 			
  1892. 			let corners;
  1893. 			
  1894. 			return (doForce = false) => {
  1895. 				if (doForce || cache.isStale()) {
  1896. 					corners = getRotatedCorners(viewport.clientWidth / 2 / zoom.value, viewport.clientHeight / 2 / zoom.value);
  1897. 				}
  1898. 				
  1899. 				const videoX = position.x * video.clientWidth;
  1900. 				const videoY = position.y * video.clientHeight;
  1901. 				
  1902. 				for (const corner of corners) {
  1903. 					if (
  1904. 						// unpause if the viewport extends more than 1 pixel beyond a video edge
  1905. 						videoX + corner.x > (0.5 - crop.right) * video.clientWidth + 1
  1906. 						|| videoX - corner.x < (crop.left - 0.5) * video.clientWidth - 1
  1907. 						|| videoY + corner.y > (0.5 - crop.top) * video.clientHeight + 1
  1908. 						|| videoY - corner.y < (crop.bottom - 0.5) * video.clientHeight - 1
  1909. 					) {
  1910. 						// fill if newly visible
  1911. 						if (this.isHidden) {
  1912. 							instance?.update(true);
  1913. 						}
  1914. 						
  1915. 						this.isHidden = false;
  1916. 						
  1917. 						glowCanvas.style.removeProperty('visibility');
  1918. 						
  1919. 						play();
  1920. 						
  1921. 						return;
  1922. 					}
  1923. 				}
  1924. 				
  1925. 				this.isHidden = true;
  1926. 				
  1927. 				glowCanvas.style.visibility = 'hidden';
  1928. 				
  1929. 				stopCopyLoop?.();
  1930. 			};
  1931. 		})();
  1932. 		
  1933. 		const loop = {};
  1934. 		
  1935. 		this.start = () => {
  1936. 			const config = $config.get().glow;
  1937. 			
  1938. 			if (!config) {
  1939. 				return;
  1940. 			}
  1941. 			
  1942. 			if (!enabler.isHidingGlow) {
  1943. 				container.style.removeProperty('display');
  1944. 			}
  1945. 			
  1946. 			// todo handle this?
  1947. 			if (crop.left + crop.right >= 1 || crop.top + crop.bottom >= 1) {
  1948. 				return;
  1949. 			}
  1950. 			
  1951. 			let loopId = -1;
  1952. 			
  1953. 			if (loop.interval !== config.interval || loop.fps !== config.fps) {
  1954. 				loop.interval = config.interval;
  1955. 				loop.fps = config.fps;
  1956. 				loop.wasSlow = false;
  1957. 				loop.throttleCount = 0;
  1958. 			}
  1959. 			
  1960. 			stopCopyLoop = () => ++loopId;
  1961. 			
  1962. 			instance = new Instance();
  1963. 			
  1964. 			startCopyLoop = async () => {
  1965. 				const id = ++loopId;
  1966. 				
  1967. 				await new Promise((resolve) => {
  1968. 					window.setTimeout(resolve, config.interval);
  1969. 				});
  1970. 				
  1971. 				while (id === loopId) {
  1972. 					const startTime = Date.now();
  1973. 					
  1974. 					instance.update();
  1975. 					
  1976. 					const delay = loop.interval - (Date.now() - startTime);
  1977. 					
  1978. 					if (delay <= 0) {
  1979. 						if (loop.wasSlow) {
  1980. 							loop.interval = 1000 / (loop.fps - ++loop.throttleCount);
  1981. 						}
  1982. 						
  1983. 						loop.wasSlow = !loop.wasSlow;
  1984. 						
  1985. 						continue;
  1986. 					}
  1987. 					
  1988. 					if (delay > 2 && loop.throttleCount > 0) {
  1989. 						console.warn(`[${GM.info.script.name}] Glow update frequency reduced from ${loop.fps} hertz to ${loop.fps - loop.throttleCount} hertz due to poor performance.`);
  1990. 						
  1991. 						loop.fps -= loop.throttleCount;
  1992. 						
  1993. 						loop.throttleCount = 0;
  1994. 					}
  1995. 					
  1996. 					loop.wasSlow = false;
  1997. 					
  1998. 					await new Promise((resolve) => {
  1999. 						window.setTimeout(resolve, delay);
  2000. 					});
  2001. 				}
  2002. 			};
  2003. 			
  2004. 			play();
  2005. 			
  2006. 			video.addEventListener('pause', stopCopyLoop);
  2007. 			video.addEventListener('play', play);
  2008. 			video.addEventListener('seeked', fill);
  2009. 			
  2010. 			document.addEventListener('visibilitychange', handleVisibilityChange);
  2011. 		};
  2012. 		
  2013. 		const priorCrop = {};
  2014. 		
  2015. 		this.hide = () => {
  2016. 			Object.assign(priorCrop, crop);
  2017. 			
  2018. 			stopCopyLoop?.();
  2019. 			
  2020. 			container.style.display = 'none';
  2021. 		};
  2022. 		
  2023. 		this.show = () => {
  2024. 			if (Object.entries(priorCrop).some(([edge, value]) => crop[edge] !== value)) {
  2025. 				this.reset();
  2026. 			} else {
  2027. 				play();
  2028. 			}
  2029. 			
  2030. 			container.style.removeProperty('display');
  2031. 		};
  2032. 		
  2033. 		this.stop = () => {
  2034. 			this.hide();
  2035. 			
  2036. 			video.removeEventListener('pause', stopCopyLoop);
  2037. 			video.removeEventListener('play', play);
  2038. 			video.removeEventListener('seeked', fill);
  2039. 			
  2040. 			document.removeEventListener('visibilitychange', handleVisibilityChange);
  2041. 			
  2042. 			startCopyLoop = undefined;
  2043. 			stopCopyLoop = undefined;
  2044. 		};
  2045. 		
  2046. 		this.reset = () => {
  2047. 			this.stop();
  2048. 			
  2049. 			this.start();
  2050. 		};
  2051. 	}();
  2052. })();
  2053.  
  2054. const peek = (stop = false) => {
  2055. 	const prior = {
  2056. 		zoom: zoom.value,
  2057. 		rotation: rotation.value,
  2058. 		crop: crop.getValues(),
  2059. 		position: position.getValues(),
  2060. 	};
  2061. 	
  2062. 	position.reset();
  2063. 	rotation.reset();
  2064. 	zoom.reset();
  2065. 	crop.reset();
  2066. 	
  2067. 	glow[stop ? 'stop' : 'reset']();
  2068. 	
  2069. 	return () => {
  2070. 		zoom.value = prior.zoom;
  2071. 		rotation.value = prior.rotation;
  2072. 		Object.assign(position, prior.position);
  2073. 		Object.assign(crop, prior.crop);
  2074. 		
  2075. 		actions.crop.set(prior.crop);
  2076. 		
  2077. 		position.apply();
  2078. 		rotation.apply();
  2079. 		zoom.apply();
  2080. 		crop.apply();
  2081. 	};
  2082. };
  2083.  
  2084. const actions = (() => {
  2085. 	const drag = (event, clickCallback, moveCallback, target = video) => new Promise((resolve) => {
  2086. 		event.stopImmediatePropagation();
  2087. 		event.preventDefault();
  2088. 		
  2089. 		// window blur events don't fire if devtools is open
  2090. 		stopDrag?.();
  2091. 		
  2092. 		target.setPointerCapture(event.pointerId);
  2093. 		
  2094. 		css.tag(enabler.CLASS_DRAGGING);
  2095. 		
  2096. 		const cancel = (event) => {
  2097. 			event.stopImmediatePropagation();
  2098. 			event.preventDefault();
  2099. 		};
  2100. 		
  2101. 		document.addEventListener('click', cancel, true);
  2102. 		document.addEventListener('dblclick', cancel, true);
  2103. 		
  2104. 		const clickDisallowListener = ({clientX, clientY}) => {
  2105. 			const {clickCutoff} = $config.get();
  2106. 			const distance = Math.abs(event.clientX - clientX) + Math.abs(event.clientY - clientY);
  2107. 			
  2108. 			if (distance >= clickCutoff) {
  2109. 				target.removeEventListener('pointermove', clickDisallowListener);
  2110. 				target.removeEventListener('pointerup', clickCallback);
  2111. 			}
  2112. 		};
  2113. 		
  2114. 		if (clickCallback) {
  2115. 			target.addEventListener('pointermove', clickDisallowListener);
  2116. 			target.addEventListener('pointerup', clickCallback, {once: true});
  2117. 		}
  2118. 		
  2119. 		target.addEventListener('pointermove', moveCallback);
  2120. 		
  2121. 		stopDrag = () => {
  2122. 			css.tag(enabler.CLASS_DRAGGING, false);
  2123. 			
  2124. 			target.removeEventListener('pointermove', moveCallback);
  2125. 			
  2126. 			if (clickCallback) {
  2127. 				target.removeEventListener('pointermove', clickDisallowListener);
  2128. 				target.removeEventListener('pointerup', clickCallback);
  2129. 			}
  2130. 			
  2131. 			// delay removing listeners for events that happen after pointerup
  2132. 			window.setTimeout(() => {
  2133. 				document.removeEventListener('dblclick', cancel, true);
  2134. 				document.removeEventListener('click', cancel, true);
  2135. 			}, 0);
  2136. 			
  2137. 			window.removeEventListener('blur', stopDrag);
  2138. 			target.removeEventListener('pointerup', stopDrag);
  2139. 			
  2140. 			target.releasePointerCapture(event.pointerId);
  2141. 			
  2142. 			stopDrag = undefined;
  2143. 			
  2144. 			enabler.handleChange();
  2145. 			
  2146. 			resolve();
  2147. 		};
  2148. 		
  2149. 		window.addEventListener('blur', stopDrag);
  2150. 		target.addEventListener('pointerup', stopDrag);
  2151. 	});
  2152. 	
  2153. 	const getOnScroll = (() => {
  2154. 		// https://stackoverflow.com/a/30134826
  2155. 		const multipliers = [1, 40, 800];
  2156. 		
  2157. 		return (callback) => (event) => {
  2158. 			event.stopImmediatePropagation();
  2159. 			event.preventDefault();
  2160. 			
  2161. 			if (event.deltaY !== 0) {
  2162. 				callback(event.deltaY * multipliers[event.deltaMode]);
  2163. 			}
  2164. 		};
  2165. 	})();
  2166. 	
  2167. 	const addListeners = ({onMouseDown, onRightClick, onScroll}, doAdd = true) => {
  2168. 		const property = `${doAdd ? 'add' : 'remove'}EventListener`;
  2169. 		
  2170. 		altTarget[property]('pointerdown', onMouseDown);
  2171. 		altTarget[property]('contextmenu', onRightClick, true);
  2172. 		altTarget[property]('wheel', onScroll);
  2173. 	};
  2174. 	
  2175. 	return {
  2176. 		crop: new function () {
  2177. 			let top = 0, right = 0, bottom = 0, left = 0, handle;
  2178. 			
  2179. 			const values = {};
  2180. 			
  2181. 			Object.defineProperty(values, 'top', {get: () => top, set: (value) => top = value});
  2182. 			Object.defineProperty(values, 'right', {get: () => right, set: (value) => right = value});
  2183. 			Object.defineProperty(values, 'bottom', {get: () => bottom, set: (value) => bottom = value});
  2184. 			Object.defineProperty(values, 'left', {get: () => left, set: (value) => left = value});
  2185. 			
  2186. 			class Button {
  2187. 				// allowance for rounding errors
  2188. 				static ALLOWANCE_HANDLE = 0.0001;
  2189. 				
  2190. 				static CLASS_HANDLE = 'viewfind-crop-handle';
  2191. 				static CLASS_EDGES = {
  2192. 					left: 'viewfind-crop-left',
  2193. 					top: 'viewfind-crop-top',
  2194. 					right: 'viewfind-crop-right',
  2195. 					bottom: 'viewfind-crop-bottom',
  2196. 				};
  2197. 				
  2198. 				static OPPOSITES = {
  2199. 					left: 'right',
  2200. 					right: 'left',
  2201. 					
  2202. 					top: 'bottom',
  2203. 					bottom: 'top',
  2204. 				};
  2205. 				
  2206. 				callbacks = [];
  2207. 				
  2208. 				element = document.createElement('div');
  2209. 				
  2210. 				constructor(...edges) {
  2211. 					this.edges = edges;
  2212. 					
  2213. 					this.isHandle = true;
  2214. 					
  2215. 					this.element.style.position = 'absolute';
  2216. 					this.element.style.pointerEvents = 'all';
  2217. 					
  2218. 					for (const edge of edges) {
  2219. 						this.element.style[edge] = '0';
  2220. 						
  2221. 						this.element.classList.add(Button.CLASS_EDGES[edge]);
  2222. 						
  2223. 						this.element.style.setProperty(`border-${Button.OPPOSITES[edge]}-width`, '1px');
  2224. 					}
  2225. 					
  2226. 					this.element.addEventListener('contextmenu', (event) => {
  2227. 						event.stopPropagation();
  2228. 						event.preventDefault();
  2229. 						
  2230. 						this.reset(false);
  2231. 					});
  2232. 					
  2233. 					this.element.addEventListener('pointerdown', (() => {
  2234. 						const clickListener = ({offsetX, offsetY, target}) => {
  2235. 							this.set({
  2236. 								width: (this.edges.includes('left') ? offsetX : target.clientWidth - offsetX) / video.clientWidth,
  2237. 								height: (this.edges.includes('top') ? offsetY : target.clientHeight - offsetY) / video.clientHeight,
  2238. 							}, false);
  2239. 						};
  2240. 						
  2241. 						const getDragListener = (event, target) => {
  2242. 							const getWidth = (() => {
  2243. 								if (this.edges.includes('left')) {
  2244. 									const position = this.element.clientWidth - event.offsetX;
  2245. 									
  2246. 									return ({offsetX}) => offsetX + position;
  2247. 								}
  2248. 								
  2249. 								const position = target.offsetWidth + event.offsetX;
  2250. 								
  2251. 								return ({offsetX}) => position - offsetX;
  2252. 							})();
  2253. 							
  2254. 							const getHeight = (() => {
  2255. 								if (this.edges.includes('top')) {
  2256. 									const position = this.element.clientHeight - event.offsetY;
  2257. 									
  2258. 									return ({offsetY}) => offsetY + position;
  2259. 								}
  2260. 								
  2261. 								const position = target.offsetHeight + event.offsetY;
  2262. 								
  2263. 								return ({offsetY}) => position - offsetY;
  2264. 							})();
  2265. 							
  2266. 							return (event) => {
  2267. 								this.set({
  2268. 									width: getWidth(event) / video.clientWidth,
  2269. 									height: getHeight(event) / video.clientHeight,
  2270. 								});
  2271. 							};
  2272. 						};
  2273. 						
  2274. 						return async (event) => {
  2275. 							if (event.buttons === 1) {
  2276. 								const target = this.element.parentElement;
  2277. 								
  2278. 								if (this.isHandle) {
  2279. 									this.setPanel();
  2280. 								}
  2281. 								
  2282. 								await drag(event, clickListener, getDragListener(event, target), target);
  2283. 								
  2284. 								this.updateCounterpart();
  2285. 							}
  2286. 						};
  2287. 					})());
  2288. 				}
  2289. 				
  2290. 				notify() {
  2291. 					for (const callback of this.callbacks) {
  2292. 						callback();
  2293. 					}
  2294. 				}
  2295. 				
  2296. 				set isHandle(value) {
  2297. 					this._isHandle = value;
  2298. 					
  2299. 					this.element.classList[value ? 'add' : 'remove'](Button.CLASS_HANDLE);
  2300. 				}
  2301. 				
  2302. 				get isHandle() {
  2303. 					return this._isHandle;
  2304. 				}
  2305. 				
  2306. 				reset() {
  2307. 					this.isHandle = true;
  2308. 					
  2309. 					for (const edge of this.edges) {
  2310. 						values[edge] = 0;
  2311. 					}
  2312. 				}
  2313. 			}
  2314. 			
  2315. 			class EdgeButton extends Button {
  2316. 				constructor(edge) {
  2317. 					super(edge);
  2318. 					
  2319. 					this.edge = edge;
  2320. 				}
  2321. 				
  2322. 				updateCounterpart() {
  2323. 					if (this.counterpart.isHandle) {
  2324. 						this.counterpart.setHandle();
  2325. 					}
  2326. 				}
  2327. 				
  2328. 				setCrop(value = 0) {
  2329. 					values[this.edge] = value;
  2330. 				}
  2331. 				
  2332. 				setPanel() {
  2333. 					this.isHandle = false;
  2334. 					
  2335. 					this.setCrop(handle);
  2336. 					
  2337. 					this.setHandle();
  2338. 				}
  2339. 			}
  2340. 			
  2341. 			class SideButton extends EdgeButton {
  2342. 				flow() {
  2343. 					let size = 1;
  2344. 					
  2345. 					if (top <= Button.ALLOWANCE_HANDLE) {
  2346. 						size -= handle;
  2347. 						
  2348. 						this.element.style.top = `${handle * 100}%`;
  2349. 					} else {
  2350. 						size -= top;
  2351. 						
  2352. 						this.element.style.top = `${top * 100}%`;
  2353. 					}
  2354. 					
  2355. 					if (bottom <= Button.ALLOWANCE_HANDLE) {
  2356. 						size -= handle;
  2357. 					} else {
  2358. 						size -= bottom;
  2359. 					}
  2360. 					
  2361. 					this.element.style.height = `${Math.max(0, size * 100)}%`;
  2362. 				}
  2363. 				
  2364. 				setBounds(counterpart, components) {
  2365. 					this.counterpart = components[counterpart];
  2366. 					
  2367. 					components.top.callbacks.push(() => {
  2368. 						this.flow();
  2369. 					});
  2370. 					
  2371. 					components.bottom.callbacks.push(() => {
  2372. 						this.flow();
  2373. 					});
  2374. 				}
  2375. 				
  2376. 				setHandle(doNotify = true) {
  2377. 					this.element.style.width = `${Math.min(1 - values[this.counterpart.edge], handle) * 100}%`;
  2378. 					
  2379. 					if (doNotify) {
  2380. 						this.notify();
  2381. 					}
  2382. 				}
  2383. 				
  2384. 				set({width}, doUpdateCounterpart = true) {
  2385. 					if (this.isHandle !== (this.isHandle = width <= Button.ALLOWANCE_HANDLE)) {
  2386. 						this.flow();
  2387. 					}
  2388. 					
  2389. 					if (doUpdateCounterpart) {
  2390. 						this.updateCounterpart();
  2391. 					}
  2392. 					
  2393. 					if (this.isHandle) {
  2394. 						this.setCrop();
  2395. 						
  2396. 						this.setHandle();
  2397. 						
  2398. 						return;
  2399. 					}
  2400. 					
  2401. 					const size = Math.min(1 - values[this.counterpart.edge], width);
  2402. 					
  2403. 					this.setCrop(size);
  2404. 					
  2405. 					this.element.style.width = `${size * 100}%`;
  2406. 					
  2407. 					this.notify();
  2408. 				}
  2409. 				
  2410. 				reset(isGeneral = true) {
  2411. 					super.reset();
  2412. 					
  2413. 					if (isGeneral) {
  2414. 						this.element.style.top = `${handle * 100}%`;
  2415. 						this.element.style.height = `${(0.5 - handle) * 200}%`;
  2416. 						this.element.style.width = `${handle * 100}%`;
  2417. 						
  2418. 						return;
  2419. 					}
  2420. 					
  2421. 					this.flow();
  2422. 					
  2423. 					this.setHandle();
  2424. 					
  2425. 					this.updateCounterpart();
  2426. 				}
  2427. 			}
  2428. 			
  2429. 			class BaseButton extends EdgeButton {
  2430. 				flow() {
  2431. 					let size = 1;
  2432. 					
  2433. 					if (left <= Button.ALLOWANCE_HANDLE) {
  2434. 						size -= handle;
  2435. 						
  2436. 						this.element.style.left = `${handle * 100}%`;
  2437. 					} else {
  2438. 						size -= left;
  2439. 						
  2440. 						this.element.style.left = `${left * 100}%`;
  2441. 					}
  2442. 					
  2443. 					if (right <= Button.ALLOWANCE_HANDLE) {
  2444. 						size -= handle;
  2445. 					} else {
  2446. 						size -= right;
  2447. 					}
  2448. 					
  2449. 					this.element.style.width = `${Math.max(0, size) * 100}%`;
  2450. 				}
  2451. 				
  2452. 				setBounds(counterpart, components) {
  2453. 					this.counterpart = components[counterpart];
  2454. 					
  2455. 					components.left.callbacks.push(() => {
  2456. 						this.flow();
  2457. 					});
  2458. 					
  2459. 					components.right.callbacks.push(() => {
  2460. 						this.flow();
  2461. 					});
  2462. 				}
  2463. 				
  2464. 				setHandle(doNotify = true) {
  2465. 					this.element.style.height = `${Math.min(1 - values[this.counterpart.edge], handle) * 100}%`;
  2466. 					
  2467. 					if (doNotify) {
  2468. 						this.notify();
  2469. 					}
  2470. 				}
  2471. 				
  2472. 				set({height}, doUpdateCounterpart = false) {
  2473. 					if (this.isHandle !== (this.isHandle = height <= Button.ALLOWANCE_HANDLE)) {
  2474. 						this.flow();
  2475. 					}
  2476. 					
  2477. 					if (doUpdateCounterpart) {
  2478. 						this.updateCounterpart();
  2479. 					}
  2480. 					
  2481. 					if (this.isHandle) {
  2482. 						this.setCrop();
  2483. 						
  2484. 						this.setHandle();
  2485. 						
  2486. 						return;
  2487. 					}
  2488. 					
  2489. 					const size = Math.min(1 - values[this.counterpart.edge], height);
  2490. 					
  2491. 					this.setCrop(size);
  2492. 					
  2493. 					this.element.style.height = `${size * 100}%`;
  2494. 					
  2495. 					this.notify();
  2496. 				}
  2497. 				
  2498. 				reset(isGeneral = true) {
  2499. 					super.reset();
  2500. 					
  2501. 					if (isGeneral) {
  2502. 						this.element.style.left = `${handle * 100}%`;
  2503. 						this.element.style.width = `${(0.5 - handle) * 200}%`;
  2504. 						this.element.style.height = `${handle * 100}%`;
  2505. 						
  2506. 						return;
  2507. 					}
  2508. 					
  2509. 					this.flow();
  2510. 					
  2511. 					this.setHandle();
  2512. 					
  2513. 					this.updateCounterpart();
  2514. 				}
  2515. 			}
  2516. 			
  2517. 			class CornerButton extends Button {
  2518. 				static CLASS_NAME = 'viewfind-crop-corner';
  2519. 				
  2520. 				constructor(sectors, ...edges) {
  2521. 					super(...edges);
  2522. 					
  2523. 					this.element.classList.add(CornerButton.CLASS_NAME);
  2524. 					
  2525. 					this.sectors = sectors;
  2526. 					
  2527. 					for (const sector of sectors) {
  2528. 						sector.callbacks.push(this.flow.bind(this));
  2529. 					}
  2530. 				}
  2531. 				
  2532. 				flow() {
  2533. 					let isHandle = true;
  2534. 					
  2535. 					if (this.sectors[0].isHandle) {
  2536. 						this.element.style.width = `${Math.min(1 - values[this.sectors[0].counterpart.edge], handle) * 100}%`;
  2537. 					} else {
  2538. 						this.element.style.width = `${values[this.edges[0]] * 100}%`;
  2539. 						
  2540. 						isHandle = false;
  2541. 					}
  2542. 					
  2543. 					if (this.sectors[1].isHandle) {
  2544. 						this.element.style.height = `${Math.min(1 - values[this.sectors[1].counterpart.edge], handle) * 100}%`;
  2545. 					} else {
  2546. 						this.element.style.height = `${values[this.edges[1]] * 100}%`;
  2547. 						
  2548. 						isHandle = false;
  2549. 					}
  2550. 					
  2551. 					this.isHandle = isHandle;
  2552. 				}
  2553. 				
  2554. 				updateCounterpart() {
  2555. 					for (const sector of this.sectors) {
  2556. 						sector.updateCounterpart();
  2557. 					}
  2558. 				}
  2559. 				
  2560. 				set(size) {
  2561. 					for (const sector of this.sectors) {
  2562. 						sector.set(size);
  2563. 					}
  2564. 				}
  2565. 				
  2566. 				reset(isGeneral = true) {
  2567. 					this.isHandle = true;
  2568. 					
  2569. 					this.element.style.width = `${handle * 100}%`;
  2570. 					this.element.style.height = `${handle * 100}%`;
  2571. 					
  2572. 					if (isGeneral) {
  2573. 						return;
  2574. 					}
  2575. 					
  2576. 					for (const sector of this.sectors) {
  2577. 						sector.reset(false);
  2578. 					}
  2579. 				}
  2580. 				
  2581. 				setPanel() {
  2582. 					for (const sector of this.sectors) {
  2583. 						sector.setPanel();
  2584. 					}
  2585. 				}
  2586. 			}
  2587. 			
  2588. 			this.CODE = 'crop';
  2589. 			
  2590. 			this.CLASS_ABLE = 'viewfind-action-able-crop';
  2591. 			
  2592. 			const container = document.createElement('div');
  2593. 			
  2594. 			// todo ditch the containers object
  2595. 			container.style.width = container.style.height = 'inherit';
  2596. 			
  2597. 			containers.foreground.append(container);
  2598. 			
  2599. 			this.reset = () => {
  2600. 				for (const component of Object.values(this.components)) {
  2601. 					component.reset(true);
  2602. 				}
  2603. 			};
  2604. 			
  2605. 			this.onRightClick = (event) => {
  2606. 				if (event.target.parentElement.id === container.id) {
  2607. 					return;
  2608. 				}
  2609. 				
  2610. 				event.stopPropagation();
  2611. 				event.preventDefault();
  2612. 				
  2613. 				if (stopDrag) {
  2614. 					return;
  2615. 				}
  2616. 				
  2617. 				this.reset();
  2618. 			};
  2619. 			
  2620. 			this.onScroll = getOnScroll((distance) => {
  2621. 				const increment = distance * $config.get().speeds.crop / zoom.value;
  2622. 				
  2623. 				this.components.top.set({height: top + Math.min((1 - top - bottom) / 2, increment)});
  2624. 				this.components.left.set({width: left + Math.min((1 - left - right) / 2, increment)});
  2625. 				
  2626. 				this.components.bottom.set({height: bottom + increment});
  2627. 				this.components.right.set({width: right + increment});
  2628. 			});
  2629. 			
  2630. 			this.onMouseDown = (() => {
  2631. 				const getDragListener = () => {
  2632. 					const multiplier = $config.get().multipliers.crop;
  2633. 					
  2634. 					const setX = ((right, left, change) => {
  2635. 						const clamped = Math.max(-left, Math.min(right, change * multiplier / video.clientWidth));
  2636. 						
  2637. 						this.components.left.set({width: left + clamped});
  2638. 						this.components.right.set({width: right - clamped});
  2639. 					}).bind(undefined, right, left);
  2640. 					
  2641. 					const setY = ((top, bottom, change) => {
  2642. 						const clamped = Math.max(-top, Math.min(bottom, change * multiplier / video.clientHeight));
  2643. 						
  2644. 						this.components.top.set({height: top + clamped});
  2645. 						
  2646. 						this.components.bottom.set({height: bottom - clamped});
  2647. 					}).bind(undefined, top, bottom);
  2648. 					
  2649. 					let priorEvent;
  2650. 					
  2651. 					return ({offsetX, offsetY}) => {
  2652. 						if (!priorEvent) {
  2653. 							priorEvent = {offsetX, offsetY};
  2654. 							
  2655. 							return;
  2656. 						}
  2657. 						
  2658. 						setX(offsetX - priorEvent.offsetX);
  2659. 						setY(offsetY - priorEvent.offsetY);
  2660. 					};
  2661. 				};
  2662. 				
  2663. 				const clickListener = () => {
  2664. 					zoom.value = zoom.getFit(1 - left - right, 1 - top - bottom);
  2665. 					
  2666. 					zoom.constrain();
  2667. 					
  2668. 					position.x = (left - right) / 2;
  2669. 					position.y = (bottom - top) / 2;
  2670. 					
  2671. 					position.constrain();
  2672. 				};
  2673. 				
  2674. 				return (event) => {
  2675. 					if (event.buttons === 1) {
  2676. 						drag(event, clickListener, getDragListener(), container);
  2677. 					}
  2678. 				};
  2679. 			})();
  2680. 			
  2681. 			this.components = {
  2682. 				top: new BaseButton('top'),
  2683. 				right: new SideButton('right'),
  2684. 				bottom: new BaseButton('bottom'),
  2685. 				left: new SideButton('left'),
  2686. 			};
  2687. 			
  2688. 			this.components.top.setBounds('bottom', this.components);
  2689. 			this.components.right.setBounds('left', this.components);
  2690. 			this.components.bottom.setBounds('top', this.components);
  2691. 			this.components.left.setBounds('right', this.components);
  2692. 			
  2693. 			this.components.topLeft = new CornerButton([this.components.left, this.components.top], 'left', 'top');
  2694. 			this.components.topRight = new CornerButton([this.components.right, this.components.top], 'right', 'top');
  2695. 			this.components.bottomLeft = new CornerButton([this.components.left, this.components.bottom], 'left', 'bottom');
  2696. 			this.components.bottomRight = new CornerButton([this.components.right, this.components.bottom], 'right', 'bottom');
  2697. 			
  2698. 			container.append(...Object.values(this.components).map(({element}) => element));
  2699. 			
  2700. 			this.set = ({top, right, bottom, left}) => {
  2701. 				this.components.top.set({height: top});
  2702. 				this.components.right.set({width: right});
  2703. 				this.components.bottom.set({height: bottom});
  2704. 				this.components.left.set({width: left});
  2705. 			};
  2706. 			
  2707. 			this.onInactive = () => {
  2708. 				addListeners(this, false);
  2709. 				
  2710. 				if (crop.left === left && crop.top === top && crop.right === right && crop.bottom === bottom) {
  2711. 					return;
  2712. 				}
  2713. 				
  2714. 				crop.left = left;
  2715. 				crop.top = top;
  2716. 				crop.right = right;
  2717. 				crop.bottom = bottom;
  2718. 				
  2719. 				crop.apply();
  2720. 			};
  2721. 			
  2722. 			this.onActive = () => {
  2723. 				const config = $config.get().crop;
  2724. 				
  2725. 				handle = config.handle / Math.max(zoom.value, 1);
  2726. 				
  2727. 				for (const component of [this.components.top, this.components.bottom, this.components.left, this.components.right]) {
  2728. 					if (component.isHandle) {
  2729. 						component.setHandle();
  2730. 					}
  2731. 				}
  2732. 				
  2733. 				crop.reveal();
  2734. 				
  2735. 				addListeners(this);
  2736. 				
  2737. 				if (!enabler.isHidingGlow) {
  2738. 					glow.handleViewChange();
  2739. 					
  2740. 					glow.reset();
  2741. 				}
  2742. 			};
  2743. 			
  2744. 			const draggingSelector = css.getSelector(enabler.CLASS_DRAGGING);
  2745. 			
  2746. 			this.updateConfig = (() => {
  2747. 				const rule = new css.Toggleable();
  2748. 				
  2749. 				return () => {
  2750. 					// set handle size
  2751. 					for (const button of [this.components.left, this.components.top, this.components.right, this.components.bottom]) {
  2752. 						if (button.isHandle) {
  2753. 							button.setHandle();
  2754. 						}
  2755. 					}
  2756. 					
  2757. 					rule.remove();
  2758. 					
  2759. 					const {colour} = $config.get().crop;
  2760. 					const {id} = container;
  2761. 					
  2762. 					rule.add(`#${id}>:hover.${Button.CLASS_HANDLE},#${id}>:not(.${Button.CLASS_HANDLE})`, ['background-color', colour.fill]);
  2763. 					rule.add(`#${id}>*`, ['border-color', colour.border]);
  2764. 					rule.add(`#${id}:not(${draggingSelector} *)>:not(:hover)`, ['filter', `drop-shadow(${colour.shadow} 0 0 1px)`]);
  2765. 				};
  2766. 			})();
  2767. 			
  2768. 			$config.ready.then(() => {
  2769. 				this.updateConfig();
  2770. 			});
  2771. 			
  2772. 			container.id = 'viewfind-crop-container';
  2773. 			
  2774. 			(() => {
  2775. 				const {id} = container;
  2776. 				
  2777. 				css.add(`${css.getSelector(enabler.CLASS_DRAGGING)} #${id}`, ['cursor', 'grabbing']);
  2778. 				css.add(`${css.getSelector(enabler.CLASS_ABLE)} #${id}`, ['cursor', 'grab']);
  2779. 				css.add(`#${id}>:not(${draggingSelector} .${Button.CLASS_HANDLE})`, ['border-style', 'solid']);
  2780. 				css.add(`${draggingSelector} #${id}>.${Button.CLASS_HANDLE}`, ['filter', 'none']);
  2781. 				
  2782. 				for (const [side, sideClass] of Object.entries(Button.CLASS_EDGES)) {
  2783. 					css.add(
  2784. 						`${draggingSelector} #${id}>.${sideClass}.${Button.CLASS_HANDLE}~.${sideClass}.${CornerButton.CLASS_NAME}`,
  2785. 						[`border-${CornerButton.OPPOSITES[side]}-style`, 'none'],
  2786. 						['filter', 'none'],
  2787. 					);
  2788. 					
  2789. 					// in fullscreen, 16:9 videos get an offsetLeft of 1px on my 16:9 monitor
  2790. 					// I'm extending buttons by 1px so that they reach the edge of screens like mine at default zoom
  2791. 					css.add(`#${id}>.${sideClass}`, [`margin-${side}`, '-1px'], [`padding-${side}`, '1px']);
  2792. 				}
  2793. 				
  2794. 				css.add(`#${id}:not(.${this.CLASS_ABLE} *)`, ['display', 'none']);
  2795. 			})();
  2796. 		}(),
  2797. 		
  2798. 		pan: new function () {
  2799. 			this.CODE = 'pan';
  2800. 			
  2801. 			this.CLASS_ABLE = 'viewfind-action-able-pan';
  2802. 			
  2803. 			this.onActive = () => {
  2804. 				this.updateCrosshair();
  2805. 				
  2806. 				addListeners(this);
  2807. 			};
  2808. 			
  2809. 			this.onInactive = () => {
  2810. 				addListeners(this, false);
  2811. 			};
  2812. 			
  2813. 			this.updateCrosshair = (() => {
  2814. 				const getRoundedString = (number, decimal = 2) => {
  2815. 					const raised = `${Math.round(number * Math.pow(10, decimal))}`.padStart(decimal + 1, '0');
  2816. 					
  2817. 					return `${raised.substr(0, raised.length - decimal)}.${raised.substr(raised.length - decimal)}`;
  2818. 				};
  2819. 				
  2820. 				const getSigned = (ratio) => {
  2821. 					const percent = Math.round(ratio * 100);
  2822. 					
  2823. 					if (percent <= 0) {
  2824. 						return `${percent}`;
  2825. 					}
  2826. 					
  2827. 					return `+${percent}`;
  2828. 				};
  2829. 				
  2830. 				return () => {
  2831. 					crosshair.text.innerText = `${getRoundedString(zoom.value)}×\n${getSigned(position.x)}%\n${getSigned(position.y)}%`;
  2832. 				};
  2833. 			})();
  2834. 			
  2835. 			this.onScroll = getOnScroll((distance) => {
  2836. 				const increment = distance * $config.get().speeds.zoom;
  2837. 				
  2838. 				if (increment > 0) {
  2839. 					zoom.value *= 1 + increment;
  2840. 				} else {
  2841. 					zoom.value /= 1 - increment;
  2842. 				}
  2843. 				
  2844. 				zoom.constrain();
  2845. 				
  2846. 				position.constrain();
  2847. 				
  2848. 				this.updateCrosshair();
  2849. 			});
  2850. 			
  2851. 			this.onRightClick = (event) => {
  2852. 				event.stopImmediatePropagation();
  2853. 				event.preventDefault();
  2854. 				
  2855. 				if (stopDrag) {
  2856. 					return;
  2857. 				}
  2858. 				
  2859. 				position.x = position.y = 0;
  2860. 				zoom.value = 1;
  2861. 				
  2862. 				position.apply();
  2863. 				
  2864. 				zoom.constrain();
  2865. 				
  2866. 				this.updateCrosshair();
  2867. 			};
  2868. 			
  2869. 			this.onMouseDown = (() => {
  2870. 				const getDragListener = () => {
  2871. 					const {multipliers} = $config.get();
  2872. 					
  2873. 					let priorEvent;
  2874. 					
  2875. 					const change = {x: 0, y: 0};
  2876. 					
  2877. 					return ({offsetX, offsetY}) => {
  2878. 						if (priorEvent) {
  2879. 							change.x = (priorEvent.offsetX + change.x - offsetX) * multipliers.pan;
  2880. 							change.y = (priorEvent.offsetY - change.y - offsetY) * -multipliers.pan;
  2881. 							
  2882. 							position.x += change.x / video.clientWidth;
  2883. 							position.y += change.y / video.clientHeight;
  2884. 							
  2885. 							position.constrain();
  2886. 							
  2887. 							this.updateCrosshair();
  2888. 						}
  2889. 						
  2890. 						// events in firefox seem to lose their data after finishing propagation
  2891. 						// so assigning the whole event doesn't work
  2892. 						priorEvent = {offsetX, offsetY};
  2893. 					};
  2894. 				};
  2895. 				
  2896. 				const clickListener = (event) => {
  2897. 					position.x = event.offsetX / video.clientWidth - 0.5;
  2898. 					// Y increases moving down the page
  2899. 					// I flip that to make trigonometry easier
  2900. 					position.y = -event.offsetY / video.clientHeight + 0.5;
  2901. 					
  2902. 					position.constrain(true);
  2903. 					
  2904. 					this.updateCrosshair();
  2905. 				};
  2906. 				
  2907. 				return (event) => {
  2908. 					if (event.buttons === 1) {
  2909. 						drag(event, clickListener, getDragListener());
  2910. 					}
  2911. 				};
  2912. 			})();
  2913. 		}(),
  2914. 		
  2915. 		rotate: new function () {
  2916. 			this.CODE = 'rotate';
  2917. 			
  2918. 			this.CLASS_ABLE = 'viewfind-action-able-rotate';
  2919. 			
  2920. 			this.onActive = () => {
  2921. 				this.updateCrosshair();
  2922. 				
  2923. 				addListeners(this);
  2924. 			};
  2925. 			
  2926. 			this.onInactive = () => {
  2927. 				addListeners(this, false);
  2928. 			};
  2929. 			
  2930. 			this.updateCrosshair = () => {
  2931. 				const angle = PI_HALVES[0] - rotation.value;
  2932. 				
  2933. 				crosshair.text.innerText = `${Math.floor((PI_HALVES[0] - rotation.value) / Math.PI * 180)}°\n≈${Math.round(angle / PI_HALVES[0]) % 4 * 90}°`;
  2934. 			};
  2935. 			
  2936. 			this.onScroll = getOnScroll((distance) => {
  2937. 				rotation.value += distance * $config.get().speeds.rotate;
  2938. 				
  2939. 				rotation.constrain();
  2940. 				
  2941. 				zoom.constrain();
  2942. 				position.constrain();
  2943. 				
  2944. 				this.updateCrosshair();
  2945. 			});
  2946. 			
  2947. 			this.onRightClick = (event) => {
  2948. 				event.stopImmediatePropagation();
  2949. 				event.preventDefault();
  2950. 				
  2951. 				if (stopDrag) {
  2952. 					return;
  2953. 				}
  2954. 				
  2955. 				rotation.value = PI_HALVES[0];
  2956. 				
  2957. 				rotation.apply();
  2958. 				
  2959. 				zoom.constrain();
  2960. 				position.constrain();
  2961. 				
  2962. 				this.updateCrosshair();
  2963. 			};
  2964. 			
  2965. 			this.onMouseDown = (() => {
  2966. 				const getDragListener = () => {
  2967. 					const {multipliers} = $config.get();
  2968. 					const middleX = containers.tracker.clientWidth / 2;
  2969. 					const middleY = containers.tracker.clientHeight / 2;
  2970. 					
  2971. 					const priorPosition = position.getValues();
  2972. 					const priorZoom = zoom.value;
  2973. 					
  2974. 					let priorMouseTheta;
  2975. 					
  2976. 					return (event) => {
  2977. 						const mouseTheta = getTheta(middleX, middleY, event.offsetX, event.offsetY);
  2978. 						
  2979. 						if (priorMouseTheta === undefined) {
  2980. 							priorMouseTheta = mouseTheta;
  2981. 							
  2982. 							return;
  2983. 						}
  2984. 						
  2985. 						position.x = priorPosition.x;
  2986. 						position.y = priorPosition.y;
  2987. 						zoom.value = priorZoom;
  2988. 						
  2989. 						rotation.value += (priorMouseTheta - mouseTheta) * multipliers.rotate;
  2990. 						
  2991. 						rotation.constrain();
  2992. 						
  2993. 						zoom.constrain();
  2994. 						position.constrain();
  2995. 						
  2996. 						this.updateCrosshair();
  2997. 						
  2998. 						priorMouseTheta = mouseTheta;
  2999. 					};
  3000. 				};
  3001. 				
  3002. 				const clickListener = () => {
  3003. 					rotation.value = Math.round(rotation.value / PI_HALVES[0]) * PI_HALVES[0];
  3004. 					
  3005. 					rotation.constrain();
  3006. 					
  3007. 					zoom.constrain();
  3008. 					position.constrain();
  3009. 					
  3010. 					this.updateCrosshair();
  3011. 				};
  3012. 				
  3013. 				return (event) => {
  3014. 					if (event.buttons === 1) {
  3015. 						drag(event, clickListener, getDragListener(), containers.tracker);
  3016. 					}
  3017. 				};
  3018. 			})();
  3019. 		}(),
  3020. 		
  3021. 		configure: new function () {
  3022. 			this.CODE = 'config';
  3023. 			
  3024. 			this.onActive = async () => {
  3025. 				await $config.edit();
  3026. 				
  3027. 				updateConfigs();
  3028. 				
  3029. 				viewport.focus();
  3030. 				
  3031. 				glow.reset();
  3032. 				
  3033. 				position.constrain();
  3034. 				zoom.constrain();
  3035. 			};
  3036. 		}(),
  3037. 		
  3038. 		reset: new function () {
  3039. 			this.CODE = 'reset';
  3040. 			
  3041. 			this.onActive = () => {
  3042. 				if (this.restore) {
  3043. 					this.restore();
  3044. 				} else {
  3045. 					this.restore = peek();
  3046. 				}
  3047. 			};
  3048. 		}(),
  3049. 	};
  3050. })();
  3051.  
  3052. const crosshair = new function () {
  3053. 	this.container = document.createElement('div');
  3054. 	
  3055. 	this.lines = {
  3056. 		horizontal: document.createElement('div'),
  3057. 		vertical: document.createElement('div'),
  3058. 	};
  3059. 	
  3060. 	this.text = document.createElement('div');
  3061. 	
  3062. 	const id = 'viewfind-crosshair';
  3063. 	
  3064. 	this.container.id = id;
  3065. 	this.container.classList.add(CLASS_VIEWFINDER);
  3066. 	
  3067. 	css.add(`#${id}:not(${css.getSelector(actions.pan.CLASS_ABLE)} *):not(${css.getSelector(actions.rotate.CLASS_ABLE)} *)`, ['display', 'none']);
  3068. 	
  3069. 	this.lines.horizontal.style.position = this.lines.vertical.style.position = this.text.style.position = this.container.style.position = 'absolute';
  3070. 	
  3071. 	this.lines.horizontal.style.top = '50%';
  3072. 	this.lines.horizontal.style.width = '100%';
  3073. 	
  3074. 	this.lines.vertical.style.left = '50%';
  3075. 	this.lines.vertical.style.height = '100%';
  3076. 	
  3077. 	this.text.style.userSelect = 'none';
  3078. 	
  3079. 	this.container.style.top = '0';
  3080. 	this.container.style.width = '100%';
  3081. 	this.container.style.height = '100%';
  3082. 	this.container.style.pointerEvents = 'none';
  3083. 	
  3084. 	this.container.append(this.lines.horizontal, this.lines.vertical);
  3085. 	
  3086. 	this.clip = () => {
  3087. 		const {outer, inner, gap} = $config.get().crosshair;
  3088. 		
  3089. 		const thickness = Math.max(inner, outer);
  3090. 		
  3091. 		const halfWidth = viewport.clientWidth / 2;
  3092. 		const halfHeight = viewport.clientHeight / 2;
  3093. 		const halfGap = gap / 2;
  3094. 		
  3095. 		const startInner = (thickness - inner) / 2;
  3096. 		const startOuter = (thickness - outer) / 2;
  3097. 		
  3098. 		const endInner = thickness - startInner;
  3099. 		const endOuter = thickness - startOuter;
  3100. 		
  3101. 		this.lines.horizontal.style.clipPath = 'path(\''
  3102. 			+ `M0 ${startOuter}L${halfWidth - halfGap} ${startOuter}L${halfWidth - halfGap} ${startInner}L${halfWidth + halfGap} ${startInner}L${halfWidth + halfGap} ${startOuter}L${viewport.clientWidth} ${startOuter}`
  3103. 			+ `L${viewport.clientWidth} ${endOuter}L${halfWidth + halfGap} ${endOuter}L${halfWidth + halfGap} ${endInner}L${halfWidth - halfGap} ${endInner}L${halfWidth - halfGap} ${endOuter}L0 ${endOuter}`
  3104. 			+ 'Z\')';
  3105. 		
  3106. 		this.lines.vertical.style.clipPath = 'path(\''
  3107. 			+ `M${startOuter} 0L${startOuter} ${halfHeight - halfGap}L${startInner} ${halfHeight - halfGap}L${startInner} ${halfHeight + halfGap}L${startOuter} ${halfHeight + halfGap}L${startOuter} ${viewport.clientHeight}`
  3108. 			+ `L${endOuter} ${viewport.clientHeight}L${endOuter} ${halfHeight + halfGap}L${endInner} ${halfHeight + halfGap}L${endInner} ${halfHeight - halfGap}L${endOuter} ${halfHeight - halfGap}L${endOuter} 0`
  3109. 			+ 'Z\')';
  3110. 	};
  3111. 	
  3112. 	this.updateConfig = (doClip = true) => {
  3113. 		const {colour, outer, inner, text} = $config.get().crosshair;
  3114. 		const thickness = Math.max(inner, outer);
  3115. 		
  3116. 		this.container.style.filter = `drop-shadow(${colour.shadow} 0 0 1px)`;
  3117. 		
  3118. 		this.lines.horizontal.style.translate = `0 -${thickness / 2}px`;
  3119. 		this.lines.vertical.style.translate = `-${thickness / 2}px 0`;
  3120. 		
  3121. 		this.lines.horizontal.style.height = this.lines.vertical.style.width = `${thickness}px`;
  3122. 		
  3123. 		this.lines.horizontal.style.backgroundColor = this.lines.vertical.style.backgroundColor = colour.fill;
  3124. 		
  3125. 		if (text) {
  3126. 			this.text.style.color = colour.fill;
  3127. 			
  3128. 			this.text.style.font = text.font;
  3129. 			this.text.style.left = `${text.position.x}%`;
  3130. 			this.text.style.top = `${text.position.y}%`;
  3131. 			this.text.style.transform = `translate(${text.translate.x}%,${text.translate.y}%) translate(${text.offset.x}px,${text.offset.y}px)`;
  3132. 			this.text.style.textAlign = text.align;
  3133. 			this.text.style.lineHeight = text.height;
  3134. 			
  3135. 			this.container.append(this.text);
  3136. 		} else {
  3137. 			this.text.remove();
  3138. 		}
  3139. 		
  3140. 		if (doClip) {
  3141. 			this.clip();
  3142. 		}
  3143. 	};
  3144. 	
  3145. 	$config.ready.then(() => {
  3146. 		this.updateConfig(false);
  3147. 	});
  3148. }();
  3149.  
  3150. // ELEMENT CHANGE LISTENERS
  3151.  
  3152. const observer = new function () {
  3153. 	const onResolutionChange = () => {
  3154. 		glow.handleSizeChange?.();
  3155. 	};
  3156. 	
  3157. 	const styleObserver = new MutationObserver((() => {
  3158. 		const properties = ['top', 'left', 'width', 'height', 'scale', 'rotate', 'translate', 'transform-origin'];
  3159. 		
  3160. 		let priorStyle;
  3161. 		
  3162. 		return () => {
  3163. 			// mousemove events on video with ctrlKey=true trigger this but have no effect
  3164. 			if (video.style.cssText === priorStyle) {
  3165. 				return;
  3166. 			}
  3167. 			
  3168. 			priorStyle = video.style.cssText;
  3169. 			
  3170. 			for (const property of properties) {
  3171. 				containers.background.style[property] = video.style[property];
  3172. 				containers.foreground.style[property] = video.style[property];
  3173. 				
  3174. 				// cinematics doesn't exist for embedded vids
  3175. 				if (cinematics) {
  3176. 					cinematics.style[property] = video.style[property];
  3177. 				}
  3178. 			}
  3179. 			
  3180. 			glow.handleViewChange();
  3181. 		};
  3182. 	})());
  3183. 	
  3184. 	const videoObserver = new ResizeObserver(() => {
  3185. 		viewportAngles.set();
  3186. 		
  3187. 		glow.handleSizeChange?.();
  3188. 	});
  3189. 	
  3190. 	const viewportObserver = new ResizeObserver(() => {
  3191. 		viewportAngles.set();
  3192. 		
  3193. 		crosshair.clip();
  3194. 	});
  3195. 	
  3196. 	this.start = () => {
  3197. 		video.addEventListener('resize', onResolutionChange);
  3198. 		
  3199. 		styleObserver.observe(video, {attributes: true, attributeFilter: ['style']});
  3200. 		viewportObserver.observe(viewport);
  3201. 		videoObserver.observe(video);
  3202. 		
  3203. 		glow.handleViewChange();
  3204. 	};
  3205. 	
  3206. 	this.stop = () => {
  3207. 		video.removeEventListener('resize', onResolutionChange);
  3208. 		
  3209. 		styleObserver.disconnect();
  3210. 		viewportObserver.disconnect();
  3211. 		videoObserver.disconnect();
  3212. 	};
  3213. }();
  3214.  
  3215. // NAVIGATION LISTENERS
  3216.  
  3217. const stop = () => {
  3218. 	if (stopped) {
  3219. 		return;
  3220. 	}
  3221. 	
  3222. 	stopped = true;
  3223. 	
  3224. 	enabler.stop();
  3225. 	
  3226. 	stopDrag?.();
  3227. 	
  3228. 	observer.stop();
  3229. 	
  3230. 	containers.background.remove();
  3231. 	containers.foreground.remove();
  3232. 	containers.tracker.remove();
  3233. 	crosshair.container.remove();
  3234. 	
  3235. 	return peek(true);
  3236. };
  3237.  
  3238. const start = () => {
  3239. 	if (!stopped || viewport.classList.contains('ad-showing')) {
  3240. 		return;
  3241. 	}
  3242. 	
  3243. 	stopped = false;
  3244. 	
  3245. 	observer.start();
  3246. 	
  3247. 	glow.start();
  3248. 	
  3249. 	viewport.append(containers.background, containers.foreground, containers.tracker, crosshair.container);
  3250. 	
  3251. 	// User may have a static minimum zoom greater than 1
  3252. 	zoom.constrain();
  3253. 	
  3254. 	enabler.handleChange();
  3255. };
  3256.  
  3257. const updateConfigs = () => {
  3258. 	ConfigCache.id++;
  3259. 	
  3260. 	enabler.updateConfig();
  3261. 	actions.crop.updateConfig();
  3262. 	crosshair.updateConfig();
  3263. };
  3264.  
  3265. // LISTENER ASSIGNMENTS
  3266.  
  3267. // load & navigation
  3268. (() => {
  3269. 	const getNode = (node, selector, ...selectors) => new Promise((resolve) => {
  3270. 		for (const child of node.children) {
  3271. 			if (child.matches(selector)) {
  3272. 				resolve(selectors.length === 0 ? child : getNode(child, ...selectors));
  3273. 				
  3274. 				return;
  3275. 			}
  3276. 		}
  3277. 	
  3278. 		new MutationObserver((changes, observer) => {
  3279. 			for (const {addedNodes} of changes) {
  3280. 				for (const child of addedNodes) {
  3281. 					if (child.matches(selector)) {
  3282. 						resolve(selectors.length === 0 ? child : getNode(child, ...selectors));
  3283. 						
  3284. 						observer.disconnect();
  3285. 						
  3286. 						return;
  3287. 					}
  3288. 				}
  3289. 			}
  3290. 		}).observe(node, {childList: true});
  3291. 	});
  3292.  
  3293. 	const init = async () => {
  3294. 		if (unsafeWindow.ytplayer?.bootstrapPlayerContainer?.childElementCount > 0) {
  3295. 			// wait for the video to be moved to ytd-app
  3296. 			await new Promise((resolve) => {
  3297. 				new MutationObserver((changes, observer) => {
  3298. 					resolve();
  3299. 					
  3300. 					observer.disconnect();
  3301. 				}).observe(unsafeWindow.ytplayer.bootstrapPlayerContainer, {childList: true});
  3302. 			});
  3303. 		}
  3304. 		
  3305. 		try {
  3306. 			await $config.ready;
  3307. 		} catch (error) {
  3308. 			if (!$config.reset || !window.confirm(`${error.message}\n\nWould you like to erase your data?`)) {
  3309. 				console.error(error);
  3310. 				
  3311. 				return;
  3312. 			}
  3313. 			
  3314. 			await $config.reset();
  3315. 			
  3316. 			updateConfigs();
  3317. 		}
  3318. 		
  3319. 		if (isEmbed) {
  3320. 			video = document.body.querySelector(SELECTOR_VIDEO);
  3321. 		} else {
  3322. 			const pageManager = await getNode(document.body, 'ytd-app', '#content', 'ytd-page-manager');
  3323.  
  3324. 			const page = pageManager.getCurrentPage() ?? await new Promise((resolve) => {
  3325. 				new MutationObserver(([{addedNodes: [page]}], observer) => {
  3326. 					if (page) {
  3327. 						resolve(page);
  3328. 						
  3329. 						observer.disconnect();
  3330. 					}
  3331. 				}).observe(pageManager, {childList: true});
  3332. 			});
  3333. 			
  3334. 			await page.playerEl.getPlayerPromise();
  3335. 			
  3336. 			video = page.playerEl.querySelector(SELECTOR_VIDEO);
  3337. 			cinematics = page.querySelector('#cinematics');
  3338. 			
  3339. 			// navigation to a new video
  3340. 			new MutationObserver(() => {
  3341. 				video.removeEventListener('play', startIfReady);
  3342. 				
  3343. 				power.off();
  3344. 				
  3345. 				// this callback can occur after metadata loads
  3346. 				startIfReady();
  3347. 			}).observe(page, {attributes: true, attributeFilter: ['video-id']});
  3348. 			
  3349. 			// navigation to a non-video page
  3350. 			new MutationObserver(() => {
  3351. 				if (video.src === '') {
  3352. 					video.removeEventListener('play', startIfReady);
  3353. 					
  3354. 					power.off();
  3355. 				}
  3356. 			}).observe(video, {attributes: true, attributeFilter: ['src']});
  3357. 		}
  3358. 		
  3359. 		viewport = video.parentElement.parentElement;
  3360. 		altTarget = viewport.parentElement;
  3361. 		
  3362. 		containers.foreground.style.zIndex = crosshair.container.style.zIndex = video.parentElement.computedStyleMap?.().get('z-index').value ?? 10;
  3363. 		crosshair.clip();
  3364. 		viewportAngles.set();
  3365. 		
  3366. 		const startIfReady = () => {
  3367. 			if (video.readyState >= HTMLMediaElement.HAVE_METADATA) {
  3368. 				start();
  3369. 			}
  3370. 		};
  3371. 		
  3372. 		const power = new function () {
  3373. 			this.off = () => {
  3374. 				delete this.wake;
  3375. 				
  3376. 				stop();
  3377. 			};
  3378. 			
  3379. 			this.sleep = () => {
  3380. 				this.wake ??= stop();
  3381. 			};
  3382. 		}();
  3383. 		
  3384. 		new MutationObserver((() => {
  3385. 			return () => {
  3386. 				// video end
  3387. 				if (viewport.classList.contains('ended-mode')) {
  3388. 					power.off();
  3389. 					
  3390. 					video.addEventListener('play', startIfReady, {once: true});
  3391. 				// ad start
  3392. 				} else if (viewport.classList.contains('ad-showing')) {
  3393. 					power.sleep();
  3394. 				}
  3395. 			};
  3396. 		})()).observe(viewport, {attributes: true, attributeFilter: ['class']});
  3397. 		
  3398. 		// glow initialisation requires video dimensions
  3399. 		startIfReady();
  3400. 		
  3401. 		video.addEventListener('loadedmetadata', () => {
  3402. 			if (viewport.classList.contains('ad-showing')) {
  3403. 				return;
  3404. 			}
  3405. 			
  3406. 			start();
  3407. 			
  3408. 			if (power.wake) {
  3409. 				power.wake();
  3410. 				
  3411. 				delete power.wake;
  3412. 			}
  3413. 		});
  3414. 	};
  3415. 	
  3416. 	if (!('ytPageType' in unsafeWindow) || unsafeWindow.ytPageType === 'watch') {
  3417. 		init();
  3418. 		
  3419. 		return;
  3420. 	}
  3421. 	
  3422. 	const initListener = ({detail: {newPageType}}) => {
  3423. 		if (newPageType === 'ytd-watch-flexy') {
  3424. 			init();
  3425. 			
  3426. 			document.body.removeEventListener('yt-page-type-changed', initListener);
  3427. 		}
  3428. 	};
  3429. 	
  3430. 	document.body.addEventListener('yt-page-type-changed', initListener);
  3431. })();
  3432.  
  3433. // keyboard state change
  3434.  
  3435. document.addEventListener('keydown', ({code}) => {
  3436. 	if (enabler.toggled) {
  3437. 		enabler.keys[enabler.keys.has(code) ? 'delete' : 'add'](code);
  3438. 		
  3439. 		enabler.handleChange();
  3440. 	} else if (!enabler.keys.has(code)) {
  3441. 		enabler.keys.add(code);
  3442. 		
  3443. 		enabler.handleChange();
  3444. 	}
  3445. });
  3446.  
  3447. document.addEventListener('keyup', ({code}) => {
  3448. 	if (enabler.toggled) {
  3449. 		return;
  3450. 	}
  3451. 	
  3452. 	if (enabler.keys.has(code)) {
  3453. 		enabler.keys.delete(code);
  3454. 		
  3455. 		enabler.handleChange();
  3456. 	}
  3457. });
  3458.  
  3459. window.addEventListener('blur', () => {
  3460. 	if (enabler.toggled) {
  3461. 		stopDrag?.();
  3462. 	} else {
  3463. 		enabler.keys.clear();
  3464. 		
  3465. 		enabler.handleChange();
  3466. 	}
  3467. });
  3468. })();

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