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YouTube Viewfinding

Zoom, rotate & crop YouTube videos

当前为 2025-05-11 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        YouTube Viewfinding
  3. // @version     0.17
  4. // @description Zoom, rotate & crop YouTube videos
  5. // @author      Callum Latham
  6. // @namespace   https://greasyfork.org/users/696211-ctl2
  7. // @license     GNU GPLv3
  8. // @compatible  chrome
  9. // @compatible  edge
  10. // @compatible  firefox Video dimensions affect page scrolling
  11. // @compatible  opera Video dimensions affect page scrolling
  12. // @match       *://www.youtube.com/*
  13. // @match       *://youtube.com/*
  14. // @require     https://update.greasyfork.org/scripts/446506/1586076/%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 hiddenNodes = {
  198. 								[LIMITS.static]: {
  199. 									label: 'Value (%)',
  200. 									predicate: (value) => value >= 0 || 'Limit must be positive',
  201. 									inputAttributes: {min: 0},
  202. 									get: ({value}) => ({custom: value / 100}),
  203. 								},
  204. 								[LIMITS.fit]: {
  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. 							
  212. 							const getNode = (label, key, value, options, ...hidden) => {
  213. 								const hideIds = {};
  214. 								const children = [{...typeNode, value, options}];
  215. 								
  216. 								for (const {id, value} of hidden) {
  217. 									const node = {...hiddenNodes[id], value, hideId: getHideId()};
  218. 									
  219. 									hideIds[node.hideId] = id;
  220. 									
  221. 									children.push(node);
  222. 								}
  223. 								
  224. 								if (hidden.length > 0) {
  225. 									children[0].onUpdate = (value) => {
  226. 										const hide = {};
  227. 										
  228. 										for (const [id, type] of Object.entries(hideIds)) {
  229. 											hide[id] = value !== type;
  230. 										}
  231. 										
  232. 										return {hide};
  233. 									};
  234. 								}
  235. 								
  236. 								return {
  237. 									label,
  238. 									get: (_, configs) => ({[key]: Object.assign(...configs)}),
  239. 									children,
  240. 								};
  241. 							};
  242. 							
  243. 							return [
  244. 								getNode(
  245. 									'Zoom In Limit',
  246. 									'zoomInLimit',
  247. 									LIMITS.static,
  248. 									[LIMITS.none, LIMITS.static, LIMITS.fit],
  249. 									{id: LIMITS.static, value: 500},
  250. 									{id: LIMITS.fit, value: 0},
  251. 								),
  252. 								getNode(
  253. 									'Zoom Out Limit',
  254. 									'zoomOutLimit',
  255. 									LIMITS.static,
  256. 									[LIMITS.none, LIMITS.static, LIMITS.fit],
  257. 									{id: LIMITS.static, value: 80},
  258. 									{id: LIMITS.fit, value: 300},
  259. 								),
  260. 								getNode(
  261. 									'Pan Limit',
  262. 									'panLimit',
  263. 									LIMITS.static,
  264. 									[LIMITS.none, LIMITS.static, LIMITS.fit],
  265. 									{id: LIMITS.static, value: 50},
  266. 								),
  267. 								getNode(
  268. 									'Snap Pan Limit',
  269. 									'snapPanLimit',
  270. 									LIMITS.fit,
  271. 									[LIMITS.none, LIMITS.fit],
  272. 								),
  273. 							];
  274. 						})(),
  275. 						{
  276. 							label: 'While Viewfinding',
  277. 							get: (_, configs) => {
  278. 								const {overlayKill, overlayHide, ...config} = Object.assign(...configs);
  279. 								
  280. 								return {
  281. 									active: {
  282. 										overlayRule: overlayKill && [overlayHide ? 'display' : 'pointer-events', 'none'],
  283. 										...config,
  284. 									},
  285. 								};
  286. 							},
  287. 							children: [
  288. 								{
  289. 									label: 'Pause Video?',
  290. 									value: false,
  291. 									get: ({value: pause}) => ({pause}),
  292. 								},
  293. 								{
  294. 									label: 'Hide Glow?',
  295. 									value: false,
  296. 									get: ({value: hideGlow}) => ({hideGlow}),
  297. 									hideId: glowHideId,
  298. 								},
  299. 								...((hideId) => [
  300. 									{
  301. 										label: 'Disable Overlay?',
  302. 										value: true,
  303. 										get: ({value: overlayKill}, configs) => Object.assign({overlayKill}, ...configs),
  304. 										onUpdate: (value) => ({hide: {[hideId]: !value}}),
  305. 										children: [
  306. 											{
  307. 												label: 'Hide Overlay?',
  308. 												value: false,
  309. 												get: ({value: overlayHide}) => ({overlayHide}),
  310. 												hideId,
  311. 											},
  312. 										],
  313. 									},
  314. 								])(getHideId()),
  315. 							],
  316. 						},
  317. 						
  318. 					],
  319. 				},
  320. 				{
  321. 					label: 'Glow',
  322. 					value: true,
  323. 					onUpdate: (value) => ({hide: {[glowHideId]: !value}}),
  324. 					get: ({value: on}, configs) => {
  325. 						if (!on) {
  326. 							return {};
  327. 						}
  328. 						
  329. 						const {turnover, ...config} = Object.assign(...configs);
  330. 						const sampleCount = Math.floor(config.fps * turnover);
  331. 						
  332. 						// avoid taking more samples than there's space for
  333. 						if (sampleCount > config.size) {
  334. 							const fps = config.size / turnover;
  335. 							
  336. 							return {
  337. 								glow: {
  338. 									...config,
  339. 									sampleCount: config.size,
  340. 									interval: 1000 / fps,
  341. 									fps,
  342. 								},
  343. 							};
  344. 						}
  345. 						
  346. 						return {
  347. 							glow: {
  348. 								...config,
  349. 								interval: 1000 / config.fps,
  350. 								sampleCount,
  351. 							},
  352. 						};
  353. 					},
  354. 					children: [
  355. 						(() => {
  356. 							const [seed, getChild] = (() => {
  357. 								const options = ['blur', 'brightness', 'contrast', 'drop-shadow', 'grayscale', 'hue-rotate', 'invert', 'opacity', 'saturate', 'sepia'];
  358. 								const ids = {};
  359. 								const hide = {};
  360. 								
  361. 								for (const option of options) {
  362. 									ids[option] = getHideId();
  363. 									
  364. 									hide[ids[option]] = true;
  365. 								}
  366. 								
  367. 								const min0Amount = {
  368. 									label: 'Amount (%)',
  369. 									value: 100,
  370. 									predicate: (value) => value >= 0 || 'Amount must be positive',
  371. 									inputAttributes: {min: 0},
  372. 								};
  373. 								
  374. 								const max100Amount = {
  375. 									label: 'Amount (%)',
  376. 									value: 0,
  377. 									predicate: (value) => {
  378. 										if (value < 0) {
  379. 											return 'Amount must be positive';
  380. 										}
  381. 										
  382. 										return value <= 100 || 'Amount may not exceed 100%';
  383. 									},
  384. 									inputAttributes: {min: 0, max: 100},
  385. 								};
  386. 								
  387. 								const getScaled = (value) => `calc(${value}px/var(${VAR_ZOOM}))`;
  388. 								
  389. 								const root = {
  390. 									label: 'Function',
  391. 									options,
  392. 									value: options[0],
  393. 									get: ({value}, configs) => {
  394. 										const config = Object.assign(...configs);
  395. 										
  396. 										switch (value) {
  397. 										case options[0]:
  398. 											return {
  399. 												filter: config.blurScale ? `blur(${config.blur}px)` : `blur(${getScaled(config.blur)})`,
  400. 												blur: {
  401. 													x: config.blur,
  402. 													y: config.blur,
  403. 													scale: config.blurScale,
  404. 												},
  405. 											};
  406. 										
  407. 										case options[3]:
  408. 											return {
  409. 												filter: config.shadowScale ?
  410. 													`drop-shadow(${config.shadow} ${config.shadowX}px ${config.shadowY}px ${config.shadowSpread}px)` :
  411. 													`drop-shadow(${config.shadow} ${getScaled(config.shadowX)} ${getScaled(config.shadowY)} ${getScaled(config.shadowSpread)})`,
  412. 												blur: {
  413. 													x: config.shadowSpread + Math.abs(config.shadowX),
  414. 													y: config.shadowSpread + Math.abs(config.shadowY),
  415. 													scale: config.shadowScale,
  416. 												},
  417. 											};
  418. 										
  419. 										case options[5]:
  420. 											return {filter: `hue-rotate(${config.hueRotate}deg)`};
  421. 										}
  422. 										
  423. 										return {filter: `${value}(${config[value]}%)`};
  424. 									},
  425. 									onUpdate: (value) => ({hide: {...hide, [ids[value]]: false}}),
  426. 								};
  427. 								
  428. 								const children = {
  429. 									'blur': [
  430. 										{
  431. 											label: 'Distance (px)',
  432. 											value: 0,
  433. 											get: ({value}) => ({blur: value}),
  434. 											predicate: (value) => value >= 0 || 'Distance must be positive',
  435. 											inputAttributes: {min: 0},
  436. 											hideId: ids.blur,
  437. 										},
  438. 										{
  439. 											label: 'Scale?',
  440. 											value: false,
  441. 											get: ({value}) => ({blurScale: value}),
  442. 											hideId: ids.blur,
  443. 										},
  444. 									],
  445. 									'brightness': [
  446. 										{
  447. 											...min0Amount,
  448. 											hideId: ids.brightness,
  449. 											get: ({value}) => ({brightness: value}),
  450. 										},
  451. 									],
  452. 									'contrast': [
  453. 										{
  454. 											...min0Amount,
  455. 											hideId: ids.contrast,
  456. 											get: ({value}) => ({contrast: value}),
  457. 										},
  458. 									],
  459. 									'drop-shadow': [
  460. 										{
  461. 											label: 'Colour',
  462. 											input: 'color',
  463. 											value: '#FFFFFF',
  464. 											get: ({value}) => ({shadow: value}),
  465. 											hideId: ids['drop-shadow'],
  466. 										},
  467. 										{
  468. 											label: 'Horizontal Offset (px)',
  469. 											value: 0,
  470. 											get: ({value}) => ({shadowX: value}),
  471. 											hideId: ids['drop-shadow'],
  472. 										},
  473. 										{
  474. 											label: 'Vertical Offset (px)',
  475. 											value: 0,
  476. 											get: ({value}) => ({shadowY: value}),
  477. 											hideId: ids['drop-shadow'],
  478. 										},
  479. 										{
  480. 											label: 'Spread (px)',
  481. 											value: 0,
  482. 											predicate: (value) => value >= 0 || 'Spread must be positive',
  483. 											inputAttributes: {min: 0},
  484. 											get: ({value}) => ({shadowSpread: value}),
  485. 											hideId: ids['drop-shadow'],
  486. 										},
  487. 										{
  488. 											label: 'Scale?',
  489. 											value: true,
  490. 											get: ({value}) => ({shadowScale: value}),
  491. 											hideId: ids['drop-shadow'],
  492. 										},
  493. 									],
  494. 									'grayscale': [
  495. 										{
  496. 											...max100Amount,
  497. 											hideId: ids.grayscale,
  498. 											get: ({value}) => ({grayscale: value}),
  499. 										},
  500. 									],
  501. 									'hue-rotate': [
  502. 										{
  503. 											label: 'Angle (deg)',
  504. 											value: 0,
  505. 											get: ({value}) => ({hueRotate: value}),
  506. 											hideId: ids['hue-rotate'],
  507. 										},
  508. 									],
  509. 									'invert': [
  510. 										{
  511. 											...max100Amount,
  512. 											hideId: ids.invert,
  513. 											get: ({value}) => ({invert: value}),
  514. 										},
  515. 									],
  516. 									'opacity': [
  517. 										{
  518. 											...max100Amount,
  519. 											value: 100,
  520. 											hideId: ids.opacity,
  521. 											get: ({value}) => ({opacity: value}),
  522. 										},
  523. 									],
  524. 									'saturate': [
  525. 										{
  526. 											...min0Amount,
  527. 											hideId: ids.saturate,
  528. 											get: ({value}) => ({saturate: value}),
  529. 										},
  530. 									],
  531. 									'sepia': [
  532. 										{
  533. 											...max100Amount,
  534. 											hideId: ids.sepia,
  535. 											get: ({value}) => ({sepia: value}),
  536. 										},
  537. 									],
  538. 								};
  539. 								
  540. 								return [
  541. 									{...root, children: Object.values(children).flat()}, (id, ...values) => {
  542. 										const replacements = [];
  543. 										
  544. 										for (const [i, child] of children[id].entries()) {
  545. 											replacements.push({...child, value: values[i]});
  546. 										}
  547. 										
  548. 										return {
  549. 											...root,
  550. 											value: id,
  551. 											children: Object.values({...children, [id]: replacements}).flat(),
  552. 										};
  553. 									},
  554. 								];
  555. 							})();
  556. 							
  557. 							return {
  558. 								label: 'Filter',
  559. 								get: (_, configs) => {
  560. 									const scaled = {x: 0, y: 0};
  561. 									const unscaled = {x: 0, y: 0};
  562. 									
  563. 									let filter = '';
  564. 									
  565. 									for (const config of configs) {
  566. 										filter += config.filter;
  567. 										
  568. 										if ('blur' in config) {
  569. 											const target = config.blur.scale ? scaled : unscaled;
  570. 											
  571. 											target.x = Math.max(target.x, config.blur.x);
  572. 											target.y = Math.max(target.y, config.blur.y);
  573. 										}
  574. 									}
  575. 									
  576. 									return {filter, blur: {scaled, unscaled}};
  577. 								},
  578. 								children: [
  579. 									getChild('saturate', 150),
  580. 									getChild('brightness', 150),
  581. 									getChild('blur', 25, false),
  582. 								],
  583. 								seed,
  584. 							};
  585. 						})(),
  586. 						{
  587. 							label: 'Update',
  588. 							childPredicate: ([{value: fps}, {value: turnover}]) => fps * turnover >= 1 || `${turnover} second turnover cannot be achieved at ${fps} hertz`,
  589. 							children: [
  590. 								{
  591. 									label: 'Frequency (Hz)',
  592. 									value: 15,
  593. 									predicate: (value) => {
  594. 										if (value > 144) {
  595. 											return 'Update frequency may not be above 144 hertz';
  596. 										}
  597. 										
  598. 										return value >= 0 || 'Update frequency must be positive';
  599. 									},
  600. 									inputAttributes: {min: 0, max: 144},
  601. 									get: ({value: fps}) => ({fps}),
  602. 								},
  603. 								{
  604. 									label: 'Turnover Time (s)',
  605. 									value: 3,
  606. 									predicate: (value) => value >= 0 || 'Turnover time must be positive',
  607. 									inputAttributes: {min: 0},
  608. 									get: ({value: turnover}) => ({turnover}),
  609. 								},
  610. 								{
  611. 									label: 'Reverse?',
  612. 									value: false,
  613. 									get: ({value: doFlip}) => ({doFlip}),
  614. 								},
  615. 							],
  616. 						},
  617. 						{
  618. 							label: 'Size (px)',
  619. 							value: 50,
  620. 							predicate: (value) => value >= 0 || 'Size must be positive',
  621. 							inputAttributes: {min: 0},
  622. 							get: ({value}) => ({size: value}),
  623. 						},
  624. 						{
  625. 							label: 'End Point (%)',
  626. 							value: 103,
  627. 							predicate: (value) => value >= 0 || 'End point must be positive',
  628. 							inputAttributes: {min: 0},
  629. 							get: ({value}) => ({end: value / 100}),
  630. 						},
  631. 					].map((node) => ({...node, hideId: glowHideId})),
  632. 				},
  633. 				{
  634. 					label: 'Interfaces',
  635. 					children: [
  636. 						{
  637. 							label: 'Crop',
  638. 							get: (_, configs) => ({crop: Object.assign(...configs)}),
  639. 							children: [
  640. 								{
  641. 									label: 'Colours',
  642. 									get: (_, configs) => ({colour: Object.assign(...configs)}),
  643. 									children: [
  644. 										{
  645. 											label: 'Fill',
  646. 											get: (_, [colour, opacity]) => ({fill: `${colour}${opacity}`}),
  647. 											children: [
  648. 												{
  649. 													label: 'Colour',
  650. 													value: '#808080',
  651. 													input: 'color',
  652. 													get: ({value}) => value,
  653. 												},
  654. 												{
  655. 													label: 'Opacity (%)',
  656. 													value: 40,
  657. 													predicate: (value) => {
  658. 														if (value < 0) {
  659. 															return 'Opacity must be positive';
  660. 														}
  661. 														
  662. 														return value <= 100 || 'Opacity may not exceed 100%';
  663. 													},
  664. 													inputAttributes: {min: 0, max: 100},
  665. 													get: ({value}) => Math.round(255 * value / 100).toString(16),
  666. 												},
  667. 											],
  668. 										},
  669. 										{
  670. 											label: 'Shadow',
  671. 											value: '#000000',
  672. 											input: 'color',
  673. 											get: ({value: shadow}) => ({shadow}),
  674. 										},
  675. 										{
  676. 											label: 'Border',
  677. 											value: '#ffffff',
  678. 											input: 'color',
  679. 											get: ({value: border}) => ({border}),
  680. 										},
  681. 									],
  682. 								},
  683. 								{
  684. 									label: 'Handle Size (%)',
  685. 									value: 6,
  686. 									predicate: (value) => {
  687. 										if (value < 0) {
  688. 											return 'Size must be positive';
  689. 										}
  690. 										
  691. 										return value <= 50 || 'Size may not exceed 50%';
  692. 									},
  693. 									inputAttributes: {min: 0, max: 50},
  694. 									get: ({value}) => ({handle: value / 100}),
  695. 								},
  696. 							],
  697. 						},
  698. 						{
  699. 							label: 'Crosshair',
  700. 							get: (value, configs) => ({crosshair: Object.assign(...configs)}),
  701. 							children: [
  702. 								{
  703. 									label: 'Outer Thickness (px)',
  704. 									value: 3,
  705. 									predicate: (value) => value >= 0 || 'Thickness must be positive',
  706. 									inputAttributes: {min: 0},
  707. 									get: ({value: outer}) => ({outer}),
  708. 								},
  709. 								{
  710. 									label: 'Inner Thickness (px)',
  711. 									value: 1,
  712. 									predicate: (value) => value >= 0 || 'Thickness must be positive',
  713. 									inputAttributes: {min: 0},
  714. 									get: ({value: inner}) => ({inner}),
  715. 								},
  716. 								{
  717. 									label: 'Inner Diameter (px)',
  718. 									value: 157,
  719. 									predicate: (value) => value >= 0 || 'Diameter must be positive',
  720. 									inputAttributes: {min: 0},
  721. 									get: ({value: gap}) => ({gap}),
  722. 								},
  723. 								((hideId) => ({
  724. 									label: 'Text',
  725. 									value: true,
  726. 									onUpdate: (value) => ({hide: {[hideId]: !value}}),
  727. 									get: ({value}, configs) => {
  728. 										if (!value) {
  729. 											return {};
  730. 										}
  731. 										
  732. 										const {translateX, translateY, ...config} = Object.assign(...configs);
  733. 										
  734. 										return {
  735. 											text: {
  736. 												translate: {
  737. 													x: translateX,
  738. 													y: translateY,
  739. 												},
  740. 												...config,
  741. 											},
  742. 										};
  743. 									},
  744. 									children: [
  745. 										{
  746. 											label: 'Font',
  747. 											value: '30px "Harlow Solid", cursive',
  748. 											predicate: isCSSRule.bind(null, 'font'),
  749. 											get: ({value: font}) => ({font}),
  750. 										},
  751. 										{
  752. 											label: 'Position (%)',
  753. 											get: (_, configs) => ({position: Object.assign(...configs)}),
  754. 											children: ['x', 'y'].map((label) => ({
  755. 												label,
  756. 												value: 0,
  757. 												predicate: (value) => Math.abs(value) <= 50 || 'Position must be on-screen',
  758. 												inputAttributes: {min: -50, max: 50},
  759. 												get: ({value}) => ({[label]: value + 50}),
  760. 											})),
  761. 										},
  762. 										{
  763. 											label: 'Offset (px)',
  764. 											get: (_, configs) => ({offset: Object.assign(...configs)}),
  765. 											children: [
  766. 												{
  767. 													label: 'x',
  768. 													value: -6,
  769. 													get: ({value: x}) => ({x}),
  770. 												},
  771. 												{
  772. 													label: 'y',
  773. 													value: -25,
  774. 													get: ({value: y}) => ({y}),
  775. 												},
  776. 											],
  777. 										},
  778. 										(() => {
  779. 											const options = ['Left', 'Center', 'Right'];
  780. 											
  781. 											return {
  782. 												label: 'Alignment',
  783. 												value: options[2],
  784. 												options,
  785. 												get: ({value}) => ({align: value.toLowerCase(), translateX: options.indexOf(value) * -50}),
  786. 											};
  787. 										})(),
  788. 										(() => {
  789. 											const options = ['Top', 'Middle', 'Bottom'];
  790. 											
  791. 											return {
  792. 												label: 'Baseline',
  793. 												value: options[0],
  794. 												options,
  795. 												get: ({value}) => ({translateY: options.indexOf(value) * -50}),
  796. 											};
  797. 										})(),
  798. 										{
  799. 											label: 'Line height (%)',
  800. 											value: 90,
  801. 											predicate: (value) => value >= 0 || 'Height must be positive',
  802. 											inputAttributes: {min: 0},
  803. 											get: ({value}) => ({height: value / 100}),
  804. 										},
  805. 									].map((node) => ({...node, hideId})),
  806. 								}))(getHideId()),
  807. 								{
  808. 									label: 'Colours',
  809. 									get: (_, configs) => ({colour: Object.assign(...configs)}),
  810. 									children: [
  811. 										{
  812. 											label: 'Fill',
  813. 											value: '#ffffff',
  814. 											input: 'color',
  815. 											get: ({value: fill}) => ({fill}),
  816. 										},
  817. 										{
  818. 											label: 'Shadow',
  819. 											value: '#000000',
  820. 											input: 'color',
  821. 											get: ({value: shadow}) => ({shadow}),
  822. 										},
  823. 									],
  824. 								},
  825. 							],
  826. 						},
  827. 					],
  828. 				},
  829. 			],
  830. 		};
  831. 	})(),
  832. 	{
  833. 		defaultStyle: {
  834. 			headBase: '#c80000',
  835. 			headButtonExit: '#000000',
  836. 			borderHead: '#ffffff',
  837. 			borderTooltip: '#c80000',
  838. 			width: Math.min(90, screen.width / 16),
  839. 			height: 90,
  840. 		},
  841. 		outerStyle: {
  842. 			zIndex: 10000,
  843. 			scrollbarColor: 'initial',
  844. 		},
  845. 		patches: [
  846. 			// removing "Glow Allowance" from pan limits
  847. 			({children: [, {children}]}) => {
  848. 				// pan
  849. 				children[2].children.splice(2, 1);
  850. 				// snap pan
  851. 				children[3].children.splice(1, 1);
  852. 			},
  853. 		],
  854. 	},
  855. );
  856.  
  857. const CLASS_VIEWFINDER = 'viewfind-element';
  858. const DEGREES = {
  859. 	45: Math.PI / 4,
  860. 	90: Math.PI / 2,
  861. 	180: Math.PI,
  862. 	270: Math.PI / 2 * 3,
  863. 	360: Math.PI * 2,
  864. };
  865. const SELECTOR_VIDEO = '#movie_player video.html5-main-video';
  866.  
  867. // STATE
  868.  
  869. // elements
  870. let video;
  871. let altTarget;
  872. let viewport;
  873. let cinematics;
  874.  
  875. // derived values
  876. let videoAngle;
  877. let isThin;
  878. let viewportRatio;
  879. let viewportRatioInverse;
  880. const halfDimensions = {
  881. 	video: {},
  882. 	viewport: {},
  883. };
  884.  
  885. // other
  886. let stopped = true;
  887. let stopDrag;
  888.  
  889. const handleViewportChange = () => {
  890. 	ViewportCache.id++;
  891. 	
  892. 	isThin = getTheta(0, 0, viewport.clientWidth, viewport.clientHeight) < videoAngle;
  893. 	
  894. 	halfDimensions.video.width = video.clientWidth / 2;
  895. 	halfDimensions.video.height = video.clientHeight / 2;
  896. 	
  897. 	halfDimensions.viewport.width = viewport.clientWidth / 2;
  898. 	halfDimensions.viewport.height = viewport.clientHeight / 2;
  899. 	
  900. 	viewportRatio = viewport.clientWidth / viewport.clientHeight;
  901. 	viewportRatioInverse = 1 / viewportRatio;
  902. 	
  903. 	position.constrain();
  904. 	
  905. 	glow.handleViewChange(true);
  906. };
  907.  
  908. // ROTATION HELPERS
  909.  
  910. const getTheta = (fromX, fromY, toX, toY) => Math.atan2(toY - fromY, toX - fromX);
  911.  
  912. const getRotatedCorners = (x, y, angle = rotation.value - DEGREES[90]) => {
  913. 	const radius = Math.sqrt(x * x + y * y);
  914. 	
  915. 	const topAngle = getTheta(0, 0, x, y) + angle;
  916. 	const bottomAngle = getTheta(0, 0, x, -y) + angle;
  917. 	
  918. 	return [
  919. 		{
  920. 			x: Math.abs(radius * Math.cos(topAngle)),
  921. 			y: Math.abs(radius * Math.sin(topAngle)),
  922. 		},
  923. 		{
  924. 			x: Math.abs(radius * Math.cos(bottomAngle)),
  925. 			y: Math.abs(radius * Math.sin(bottomAngle)),
  926. 		},
  927. 	];
  928. };
  929.  
  930. // CSS HELPER
  931.  
  932. const css = new function () {
  933. 	this.has = (name) => document.body.classList.contains(name);
  934. 	this.tag = (name, doAdd = true) => document.body.classList[doAdd ? 'add' : 'remove'](name);
  935. 	
  936. 	this.getSelector = (...classes) => `body.${classes.join('.')}`;
  937. 	
  938. 	const getSheet = () => {
  939. 		const element = document.createElement('style');
  940. 		
  941. 		document.head.appendChild(element);
  942. 		
  943. 		return element.sheet;
  944. 	};
  945. 	
  946. 	const getRuleString = (selector, ...declarations) => `${selector}{${declarations.map(([property, value]) => `${property}:${value};`).join('')}}`;
  947. 	
  948. 	this.add = function (...rule) {
  949. 		this.insertRule(getRuleString(...rule));
  950. 	}.bind(getSheet());
  951. 	
  952. 	this.Toggleable = class {
  953. 		static sheet = getSheet();
  954. 		
  955. 		static active = [];
  956. 		
  957. 		static id = 0;
  958. 		
  959. 		static add(rule, id) {
  960. 			this.sheet.insertRule(rule, this.active.length);
  961. 			
  962. 			this.active.push(id);
  963. 		}
  964. 		
  965. 		static remove(id) {
  966. 			let index = this.active.indexOf(id);
  967. 			
  968. 			while (index >= 0) {
  969. 				this.sheet.deleteRule(index);
  970. 				
  971. 				this.active.splice(index, 1);
  972. 				
  973. 				index = this.active.indexOf(id);
  974. 			}
  975. 		}
  976. 		
  977. 		id = this.constructor.id++;
  978. 		
  979. 		add(...rule) {
  980. 			this.constructor.add(getRuleString(...rule), this.id);
  981. 		}
  982. 		
  983. 		remove() {
  984. 			this.constructor.remove(this.id);
  985. 		}
  986. 	};
  987. }();
  988.  
  989. // ACTION MANAGER
  990.  
  991. const enabler = new function () {
  992. 	this.CLASS_ABLE = 'viewfind-action-able';
  993. 	this.CLASS_DRAGGING = 'viewfind-action-dragging';
  994. 	
  995. 	this.keys = new Set();
  996. 	
  997. 	this.didPause = false;
  998. 	this.isHidingGlow = false;
  999. 	
  1000. 	this.setActive = (action) => {
  1001. 		const {active, keys} = $config.get();
  1002. 		
  1003. 		if (active.hideGlow && Boolean(action) !== this.isHidingGlow) {
  1004. 			if (action) {
  1005. 				this.isHidingGlow = true;
  1006. 				
  1007. 				glow.hide();
  1008. 			} else if (this.isHidingGlow) {
  1009. 				this.isHidingGlow = false;
  1010. 				
  1011. 				glow.show();
  1012. 			}
  1013. 		}
  1014. 		
  1015. 		this.activeAction?.onInactive?.();
  1016. 		
  1017. 		if (action) {
  1018. 			this.activeAction = action;
  1019. 			this.toggled = keys[action.CODE].toggle;
  1020. 			
  1021. 			action.onActive?.();
  1022. 			
  1023. 			if (active.pause && !video.paused) {
  1024. 				video.pause();
  1025. 				
  1026. 				this.didPause = true;
  1027. 			}
  1028. 			
  1029. 			return;
  1030. 		}
  1031. 		
  1032. 		if (this.didPause) {
  1033. 			video.play();
  1034. 			
  1035. 			this.didPause = false;
  1036. 		}
  1037. 		
  1038. 		this.activeAction = this.toggled = undefined;
  1039. 	};
  1040. 	
  1041. 	this.handleChange = () => {
  1042. 		if (stopped || stopDrag || video.ended) {
  1043. 			return;
  1044. 		}
  1045. 		
  1046. 		const {keys} = $config.get();
  1047. 		
  1048. 		let activeAction;
  1049. 		
  1050. 		for (const action of Object.values(actions)) {
  1051. 			if (
  1052. 				!this.keys.isSupersetOf(keys[action.CODE].keys) || activeAction && ('toggle' in keys[action.CODE] ?
  1053. 					!('toggle' in keys[activeAction.CODE]) || keys[activeAction.CODE].keys.size >= keys[action.CODE].keys.size :
  1054. 					!('toggle' in keys[activeAction.CODE]) && keys[activeAction.CODE].keys.size >= keys[action.CODE].keys.size)
  1055. 			) {
  1056. 				if ('CLASS_ABLE' in action) {
  1057. 					css.tag(action.CLASS_ABLE, false);
  1058. 				}
  1059. 				
  1060. 				continue;
  1061. 			}
  1062. 			
  1063. 			if (activeAction && 'CLASS_ABLE' in activeAction) {
  1064. 				css.tag(activeAction.CLASS_ABLE, false);
  1065. 			}
  1066. 			
  1067. 			activeAction = action;
  1068. 		}
  1069. 		
  1070. 		if (activeAction === this.activeAction) {
  1071. 			return;
  1072. 		}
  1073. 		
  1074. 		if (activeAction) {
  1075. 			if ('CLASS_ABLE' in activeAction) {
  1076. 				css.tag(activeAction.CLASS_ABLE);
  1077. 				
  1078. 				css.tag(this.CLASS_ABLE);
  1079. 				
  1080. 				this.setActive(activeAction);
  1081. 				
  1082. 				return;
  1083. 			}
  1084. 			
  1085. 			this.activeAction?.onInactive?.();
  1086. 			
  1087. 			activeAction.onActive();
  1088. 			
  1089. 			this.activeAction = activeAction;
  1090. 		}
  1091. 		
  1092. 		css.tag(this.CLASS_ABLE, false);
  1093. 		
  1094. 		this.setActive(false);
  1095. 	};
  1096. 	
  1097. 	this.stop = () => {
  1098. 		css.tag(this.CLASS_ABLE, false);
  1099. 		
  1100. 		for (const action of Object.values(actions)) {
  1101. 			if ('CLASS_ABLE' in action) {
  1102. 				css.tag(action.CLASS_ABLE, false);
  1103. 			}
  1104. 		}
  1105. 		
  1106. 		this.setActive(false);
  1107. 	};
  1108. 	
  1109. 	this.updateConfig = (() => {
  1110. 		const rule = new css.Toggleable();
  1111. 		const selector = `${css.getSelector(this.CLASS_ABLE)} #contentContainer.tp-yt-app-drawer[swipe-open]::after`
  1112. 			+ `,${css.getSelector(this.CLASS_ABLE)} #movie_player > .html5-video-container ~ :not(.${CLASS_VIEWFINDER})`;
  1113. 		
  1114. 		return () => {
  1115. 			const {overlayRule} = $config.get().active;
  1116. 			
  1117. 			rule.remove();
  1118. 			
  1119. 			if (overlayRule) {
  1120. 				rule.add(selector, overlayRule);
  1121. 			}
  1122. 		};
  1123. 	})();
  1124. 	
  1125. 	$config.ready.then(() => {
  1126. 		this.updateConfig();
  1127. 	});
  1128. 	
  1129. 	// insertion order decides priority
  1130. 	css.add(`${css.getSelector(this.CLASS_DRAGGING)} #movie_player`, ['cursor', 'grabbing']);
  1131. 	css.add(`${css.getSelector(this.CLASS_ABLE)} #movie_player`, ['cursor', 'grab']);
  1132. }();
  1133.  
  1134. // ELEMENT CONTAINER SETUP
  1135.  
  1136. const containers = new function () {
  1137. 	for (const name of ['background', 'foreground', 'tracker']) {
  1138. 		this[name] = document.createElement('div');
  1139. 		
  1140. 		this[name].classList.add(CLASS_VIEWFINDER);
  1141. 	}
  1142. 	
  1143. 	// make an outline of the uncropped video
  1144. 	css.add(`${css.getSelector(enabler.CLASS_ABLE)} #${this.foreground.id = 'viewfind-outlined'}`, ['outline', '1px solid white']);
  1145. 	
  1146. 	this.background.style.position = this.foreground.style.position = 'absolute';
  1147. 	this.background.style.pointerEvents = this.foreground.style.pointerEvents = this.tracker.style.pointerEvents = 'none';
  1148. 	this.tracker.style.height = this.tracker.style.width = '100%';
  1149. }();
  1150.  
  1151. // MODIFIERS
  1152.  
  1153. class Cache {
  1154. 	targets = [];
  1155. 	
  1156. 	constructor(...targets) {
  1157. 		for (const source of targets) {
  1158. 			this.targets.push({source});
  1159. 		}
  1160. 	}
  1161. 	
  1162. 	update(target) {
  1163. 		return target.value !== (target.value = target.source.value);
  1164. 	}
  1165. 	
  1166. 	isStale() {
  1167. 		return this.targets.reduce((value, target) => value || this.update(target), false);
  1168. 	}
  1169. }
  1170.  
  1171. class ConfigCache extends Cache {
  1172. 	static id = 0;
  1173. 	
  1174. 	id = this.constructor.id;
  1175. 	
  1176. 	constructor(...targets) {
  1177. 		super(...targets);
  1178. 	}
  1179. 	
  1180. 	isStale() {
  1181. 		if (this.id === (this.id = this.constructor.id)) {
  1182. 			return super.isStale();
  1183. 		}
  1184. 		
  1185. 		for (const target of this.targets) {
  1186. 			target.value = target.source.value;
  1187. 		}
  1188. 		
  1189. 		return true;
  1190. 	}
  1191. }
  1192.  
  1193. class ViewportCache extends ConfigCache {
  1194. 	static id = 0;
  1195. }
  1196.  
  1197. const rotation = new function () {
  1198. 	this.value = DEGREES[90];
  1199. 	
  1200. 	this.reset = () => {
  1201. 		this.value = DEGREES[90];
  1202. 		
  1203. 		video.style.removeProperty('rotate');
  1204. 	};
  1205. 	
  1206. 	this.apply = () => {
  1207. 		// Conversion from anticlockwise rotation from the x-axis to clockwise rotation from the y-axis
  1208. 		video.style.setProperty('rotate', `${DEGREES[90] - this.value}rad`);
  1209. 		
  1210. 		delete actions.reset.restore;
  1211. 	};
  1212. 	
  1213. 	// dissimilar from other constrain functions in that no effective limit is applied
  1214. 	// -1.5π < rotation <= 0.5π
  1215. 	// 0 <= 0.5π - rotation < 2π
  1216. 	this.constrain = () => {
  1217. 		this.value %= DEGREES[360];
  1218. 		
  1219. 		if (this.value > DEGREES[90]) {
  1220. 			this.value -= DEGREES[360];
  1221. 		} else if (this.value <= -DEGREES[270]) {
  1222. 			this.value += DEGREES[360];
  1223. 		}
  1224. 		
  1225. 		this.apply();
  1226. 	};
  1227. }();
  1228.  
  1229. const zoom = new function () {
  1230. 	this.value = 1;
  1231. 	
  1232. 	const scaleRule = new css.Toggleable();
  1233. 	
  1234. 	this.reset = () => {
  1235. 		this.value = 1;
  1236. 		
  1237. 		video.style.removeProperty('scale');
  1238. 		
  1239. 		scaleRule.remove();
  1240. 		scaleRule.add(':root', [VAR_ZOOM, '1']);
  1241. 	};
  1242. 	
  1243. 	this.apply = () => {
  1244. 		video.style.setProperty('scale', `${this.value}`);
  1245. 		
  1246. 		scaleRule.remove();
  1247. 		scaleRule.add(':root', [VAR_ZOOM, `${this.value}`]);
  1248. 		
  1249. 		delete actions.reset.restore;
  1250. 	};
  1251. 	
  1252. 	this.getFit = (width = 1, height = 1, doSplit = false) => {
  1253. 		const [corner0, corner1] = getRotatedCorners(width * video.clientWidth, height * video.clientHeight);
  1254. 		
  1255. 		return doSplit ?
  1256. 			[
  1257. 				1 / Math.max(corner0.x / viewport.clientWidth, corner1.x / viewport.clientWidth),
  1258. 				1 / Math.max(corner0.y / viewport.clientHeight, corner1.y / viewport.clientHeight),
  1259. 			] :
  1260. 			1 / Math.max(
  1261. 				corner0.x / viewport.clientWidth, corner1.x / viewport.clientWidth,
  1262. 				corner0.y / viewport.clientHeight, corner1.y / viewport.clientHeight,
  1263. 			);
  1264. 	};
  1265. 	
  1266. 	this.constrain = (() => {
  1267. 		const limitGetters = {
  1268. 			[LIMITS.static]: [({custom}) => custom, ({custom}) => custom],
  1269. 			[LIMITS.fit]: (() => {
  1270. 				const getGetter = () => {
  1271. 					const zoomCache = new Cache(this);
  1272. 					const rotationCache = new ViewportCache(rotation);
  1273. 					const configCache = new ConfigCache();
  1274. 					
  1275. 					let updateOnZoom;
  1276. 					
  1277. 					let value;
  1278. 					
  1279. 					return ({frame}, glow) => {
  1280. 						let fallthrough = rotationCache.isStale();
  1281. 						
  1282. 						if (configCache.isStale()) {
  1283. 							if (glow) {
  1284. 								const {scaled} = glow.blur;
  1285. 								
  1286. 								updateOnZoom = frame > 0 && (scaled.x > 0 || scaled.y > 0);
  1287. 							} else {
  1288. 								updateOnZoom = false;
  1289. 							}
  1290. 							
  1291. 							fallthrough = true;
  1292. 						}
  1293. 						
  1294. 						if (zoomCache.isStale() && updateOnZoom || fallthrough) {
  1295. 							if (glow) {
  1296. 								const base = glow.end - 1;
  1297. 								const {scaled, unscaled} = glow.blur;
  1298. 								
  1299. 								value = this.getFit(
  1300. 									1 + Math.max(0, base + Math.max(unscaled.x / video.clientWidth, scaled.x * this.value / video.clientWidth)) * frame,
  1301. 									1 + Math.max(0, base + Math.max(unscaled.y / video.clientHeight, scaled.y * this.value / video.clientHeight)) * frame,
  1302. 								);
  1303. 							} else {
  1304. 								value = this.getFit();
  1305. 							}
  1306. 						}
  1307. 						
  1308. 						return value;
  1309. 					};
  1310. 				};
  1311. 				
  1312. 				return [getGetter(), getGetter()];
  1313. 			})(),
  1314. 		};
  1315. 		
  1316. 		return () => {
  1317. 			const {zoomOutLimit, zoomInLimit, glow} = $config.get();
  1318. 			
  1319. 			if (zoomOutLimit.type !== 'None') {
  1320. 				this.value = Math.max(limitGetters[zoomOutLimit.type][0](zoomOutLimit, glow), this.value);
  1321. 			}
  1322. 			
  1323. 			if (zoomInLimit.type !== 'None') {
  1324. 				this.value = Math.min(limitGetters[zoomInLimit.type][1](zoomInLimit, glow, 1), this.value);
  1325. 			}
  1326. 			
  1327. 			this.apply();
  1328. 		};
  1329. 	})();
  1330. }();
  1331.  
  1332. const position = new function () {
  1333. 	this.x = this.y = 0;
  1334. 	
  1335. 	this.getValues = () => ({x: this.x, y: this.y});
  1336. 	
  1337. 	this.reset = () => {
  1338. 		this.x = this.y = 0;
  1339. 		
  1340. 		video.style.removeProperty('translate');
  1341. 	};
  1342. 	
  1343. 	this.apply = () => {
  1344. 		video.style.setProperty('transform-origin', `${(0.5 + this.x) * 100}% ${(0.5 - this.y) * 100}%`);
  1345. 		video.style.setProperty('translate', `${-this.x * 100}% ${this.y * 100}%`);
  1346. 		
  1347. 		delete actions.reset.restore;
  1348. 	};
  1349. 	
  1350. 	this.constrain = (() => {
  1351. 		// logarithmic progress from "low" to infinity
  1352. 		const getProgress = (low, target) => 1 - low / target;
  1353. 		
  1354. 		const getProgressed = ({x: fromX, y: fromY, z: lowZ}, {x: toX, y: toY}, targetZ) => {
  1355. 			const p = getProgress(lowZ, targetZ);
  1356. 			
  1357. 			return {x: p * (toX - fromX) + fromX, y: p * (toY - fromY) + fromY};
  1358. 		};
  1359. 		
  1360. 		// y = mx + c
  1361. 		const getLineY = ({m, c}, x = this.x) => m * x + c;
  1362. 		// x = (y - c) / m
  1363. 		const getLineX = ({m, c}, y = this.y) => (y - c) / m;
  1364. 		
  1365. 		const getM = (from, to) => (to.y - from.y) / (to.x - from.x);
  1366. 		const getLine = (m, {x, y}) => ({c: y - m * x, m});
  1367. 		const getFlipped = ({x, y}) => ({x: -x, y: -y});
  1368. 		
  1369. 		const correctY = (line, left, right) => {
  1370. 			if (this.x >= left.x && this.x <= right.x) {
  1371. 				this.y = getLineY(line, this.x);
  1372. 				
  1373. 				return true;
  1374. 			}
  1375. 		};
  1376. 		
  1377. 		const correctX = (line, bottom, top) => {
  1378. 			if (this.y >= bottom.y && this.y <= top.y) {
  1379. 				this.x = getLineX(line, this.y);
  1380. 				
  1381. 				return true;
  1382. 			}
  1383. 		};
  1384. 		
  1385. 		const isAbove = ({m, c}, {x, y} = this) => m * x + c < y;
  1386. 		const isRight = ({m, c}, {x, y} = this) => (y - c) / m < x;
  1387. 		
  1388. 		const apply2DFrame = (points, lines) => {
  1389. 			const {x, y} = this;
  1390. 			
  1391. 			if (Math.abs(lines.right.c) === Infinity) {
  1392. 				this.x = Math.min(points.topRight.x, Math.max(points.topLeft.x, this.x));
  1393. 			} else if (isRight(lines.right)) {
  1394. 				if (correctX(lines.right, points.bottomRight, points.topRight)) {
  1395. 					return;
  1396. 				}
  1397. 			} else if (!isRight(lines.left)) {
  1398. 				if (correctX(lines.left, points.bottomLeft, points.topLeft)) {
  1399. 					return;
  1400. 				}
  1401. 			}
  1402. 			
  1403. 			if (isAbove(lines.top)) {
  1404. 				if (correctY(lines.top, points.topLeft, points.topRight)) {
  1405. 					return;
  1406. 				}
  1407. 			} else if (!isAbove(lines.bottom)) {
  1408. 				if (correctY(lines.bottom, points.bottomLeft, points.bottomRight)) {
  1409. 					return;
  1410. 				}
  1411. 			}
  1412. 			
  1413. 			if (x <= points.bottomLeft.x && y <= points.bottomLeft.y) {
  1414. 				this.x = points.bottomLeft.x;
  1415. 				this.y = points.bottomLeft.y;
  1416. 			} else if (x >= points.bottomRight.x && y <= points.bottomRight.y) {
  1417. 				this.x = points.bottomRight.x;
  1418. 				this.y = points.bottomRight.y;
  1419. 			} else if (x <= points.topLeft.x && y >= points.topLeft.y) {
  1420. 				this.x = points.topLeft.x;
  1421. 				this.y = points.topLeft.y;
  1422. 			} else if (x >= points.topRight.x && y >= points.topRight.y) {
  1423. 				this.x = points.topRight.x;
  1424. 				this.y = points.topRight.y;
  1425. 			}
  1426. 		};
  1427. 		
  1428. 		const apply1DSideFrame = {
  1429. 			x: (line) => {
  1430. 				this.x = Math.max(-line.x, Math.min(line.x, this.x));
  1431. 				
  1432. 				this.y = getLineY(line);
  1433. 			},
  1434. 			y: (line) => {
  1435. 				this.y = Math.max(-line.y, Math.min(line.y, this.y));
  1436. 				
  1437. 				this.x = getLineX(line);
  1438. 			},
  1439. 		};
  1440. 		
  1441. 		const swap = (array, i0, i1) => {
  1442. 			const temp = array[i0];
  1443. 			
  1444. 			array[i0] = array[i1];
  1445. 			array[i1] = temp;
  1446. 		};
  1447. 		
  1448. 		const getBoundApplyFrame = (() => {
  1449. 			const getBound = (first, second, isTopLeft) => {
  1450. 				if (zoom.value <= first.z) {
  1451. 					return false;
  1452. 				}
  1453. 				
  1454. 				if (zoom.value >= second.z) {
  1455. 					const progress = zoom.value / second.z;
  1456. 					
  1457. 					const x = isTopLeft ?
  1458. 						-0.5 - (-0.5 - second.x) / progress :
  1459. 						0.5 - (0.5 - second.x) / progress;
  1460. 					
  1461. 					return {
  1462. 						x,
  1463. 						y: 0.5 - (0.5 - second.y) / progress,
  1464. 					};
  1465. 				}
  1466. 				
  1467. 				return {
  1468. 					...getProgressed(first, second.vpEnd, zoom.value),
  1469. 					axis: second.vpEnd.axis,
  1470. 					m: second.y / second.x,
  1471. 					c: 0,
  1472. 				};
  1473. 			};
  1474. 			
  1475. 			const getFrame = (point0, point1) => {
  1476. 				const points = {};
  1477. 				const lines = {};
  1478. 				
  1479. 				const flipped0 = getFlipped(point0);
  1480. 				const flipped1 = getFlipped(point1);
  1481. 				
  1482. 				const m0 = getM(point0, point1);
  1483. 				const m1 = getM(flipped0, point1);
  1484. 				
  1485. 				lines.top = getLine(m0, point0);
  1486. 				lines.bottom = getLine(m0, flipped0);
  1487. 				
  1488. 				lines.left = getLine(m1, point0);
  1489. 				lines.right = getLine(m1, flipped0);
  1490. 				
  1491. 				points.topLeft = point0;
  1492. 				points.topRight = point1;
  1493. 				points.bottomLeft = flipped1;
  1494. 				points.bottomRight = flipped0;
  1495. 				
  1496. 				if (video.clientWidth < video.clientHeight) {
  1497. 					if (getLineX(lines.right, 0) < getLineX(lines.left, 0)) {
  1498. 						swap(lines, 'right', 'left');
  1499. 						
  1500. 						swap(points, 'bottomLeft', 'bottomRight');
  1501. 						swap(points, 'topLeft', 'topRight');
  1502. 					}
  1503. 				} else {
  1504. 					if (lines.top.c < lines.bottom.c) {
  1505. 						swap(lines, 'top', 'bottom');
  1506. 						
  1507. 						swap(points, 'topLeft', 'bottomLeft');
  1508. 						swap(points, 'topRight', 'bottomRight');
  1509. 					}
  1510. 				}
  1511. 				
  1512. 				return [points, lines];
  1513. 			};
  1514. 			
  1515. 			return (first0, second0, first1, second1) => {
  1516. 				const point0 = getBound(first0, second0, true);
  1517. 				const point1 = getBound(first1, second1, false);
  1518. 				
  1519. 				if (!point0 && !point1) {
  1520. 					return () => {
  1521. 						this.x = this.y = 0;
  1522. 					};
  1523. 				}
  1524. 				
  1525. 				if (!point0 || !point1 || point0.axis && point0.axis === point1.axis) {
  1526. 					// todo choose the longer line?
  1527. 					const point = point0 || point1;
  1528. 					const {axis} = point;
  1529. 					
  1530. 					point.axis ??= Math.abs(point.x) > Math.abs(point.y) ? 'x' : 'y';
  1531. 					
  1532. 					if (point[point.axis] < 0) {
  1533. 						point.x = -point.x;
  1534. 						point.y = -point.y;
  1535. 					}
  1536. 					
  1537. 					if (!axis) {
  1538. 						point.m = point.y / point.x;
  1539. 						
  1540. 						point.c = 0;
  1541. 					}
  1542. 					
  1543. 					return apply1DSideFrame[point.axis].bind(null, point);
  1544. 				}
  1545. 				
  1546. 				return apply2DFrame.bind(null, ...getFrame(point0, point1));
  1547. 			};
  1548. 		})();
  1549. 		
  1550. 		const snapZoom = (() => {
  1551. 			const getDirected = (first, second, flipX, flipY) => {
  1552. 				const line0 = [first, {}];
  1553. 				const line1 = [{z: second.z}, {}];
  1554. 				
  1555. 				if (flipX) {
  1556. 					line0[1].x = -second.vpEnd.x;
  1557. 					line1[0].x = -second.x;
  1558. 					line1[1].x = -0.5;
  1559. 				} else {
  1560. 					line0[1].x = second.vpEnd.x;
  1561. 					line1[0].x = second.x;
  1562. 					line1[1].x = 0.5;
  1563. 				}
  1564. 				
  1565. 				if (flipY) {
  1566. 					line0[1].y = -second.vpEnd.y;
  1567. 					line1[0].y = -second.y;
  1568. 					line1[1].y = -0.5;
  1569. 				} else {
  1570. 					line0[1].y = second.vpEnd.y;
  1571. 					line1[0].y = second.y;
  1572. 					line1[1].y = 0.5;
  1573. 				}
  1574. 				
  1575. 				return [line0, line1];
  1576. 			};
  1577. 			
  1578. 			// https://math.stackexchange.com/questions/2223691/intersect-2-lines-at-the-same-ratio-through-a-point
  1579. 			const getIntersectProgress = ({x, y}, [{x: g, y: e}, {x: f, y: d}], [{x: k, y: i}, {x: j, y: h}], doFlip) => {
  1580. 				const a = d * j - d * k - j * e + e * k - h * f + h * g + i * f - i * g;
  1581. 				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;
  1582. 				const c = k * e - e * x - k * y - g * i + i * x + g * y;
  1583. 				
  1584. 				return (doFlip ? -b - Math.sqrt(b * b - 4 * a * c) : -b + Math.sqrt(b * b - 4 * a * c)) / (2 * a);
  1585. 			};
  1586. 			
  1587. 			const getLineFromPoints = (from, to) => getLine(getM(from, to), from);
  1588. 			
  1589. 			// line with progressed start point
  1590. 			const getProgressedLine = (line, {z}) => [getProgressed(...line, z), line[1]];
  1591. 			
  1592. 			return (first0, _second0, first1, second1) => {
  1593. 				const second0 = {..._second0, x: -_second0.x, vpEnd: {..._second0.vpEnd, x: -_second0.vpEnd.x}};
  1594. 				
  1595. 				const absPosition = {x: Math.abs(this.x), y: Math.abs(this.y)};
  1596. 				
  1597. 				const getPairings = (flipX0, flipY0, flipX1, flipY1) => {
  1598. 					const [lineFirst0, lineSecond0] = getDirected(first0, second0, flipX0, flipY0);
  1599. 					const [lineFirst1, lineSecond1] = getDirected(first1, second1, flipX1, flipY1);
  1600. 					
  1601. 					// array structure is:
  1602. 					// start zoom for both lines
  1603. 					// 0 line start and its infinite zoom point
  1604. 					// 1 line start and its infinite zoom point
  1605. 					
  1606. 					return [
  1607. 						first0.z >= first1.z ?
  1608. 							[first0.z, lineFirst0, getProgressedLine(lineFirst1, first0)] :
  1609. 							[first1.z, getProgressedLine(lineFirst0, first1), lineFirst1],
  1610. 						
  1611. 						...second0.z >= second1.z ?
  1612. 							[
  1613. 								[second1.z, getProgressedLine(lineFirst0, second1), lineSecond1],
  1614. 								[second0.z, lineSecond0, getProgressedLine(lineSecond1, second0)],
  1615. 							] :
  1616. 							[
  1617. 								[second0.z, lineSecond0, getProgressedLine(lineFirst1, second0)],
  1618. 								[second1.z, getProgressedLine(lineSecond0, second1), lineSecond1],
  1619. 							],
  1620. 					];
  1621. 				};
  1622. 				
  1623. 				const [pair0, pair1, pair2, doFlip = false] = (() => {
  1624. 					if (this.x >= 0 !== this.y >= 0) {
  1625. 						return isAbove(getLineFromPoints(second0, {x: 0.5, y: 0.5}), absPosition) ?
  1626. 							[...getPairings(false, false, true, false), true] :
  1627. 							getPairings(false, false, false, true);
  1628. 					}
  1629. 					
  1630. 					return isAbove(getLineFromPoints(second1, {x: 0.5, y: 0.5}), absPosition) ?
  1631. 						getPairings(true, false, false, false) :
  1632. 						[...getPairings(false, true, false, false), true];
  1633. 				})();
  1634. 				
  1635. 				const applyZoomPairSecond = ([z, ...pair], maxP = 1) => {
  1636. 					const p = getIntersectProgress(absPosition, ...pair, doFlip);
  1637. 					
  1638. 					if (p >= 0 && p <= maxP) {
  1639. 						// I don't think the >= 1 check is necessary but best be safe
  1640. 						zoom.value = p >= 1 ? Number.MAX_SAFE_INTEGER : z / (1 - p);
  1641. 						
  1642. 						return true;
  1643. 					}
  1644. 					
  1645. 					return false;
  1646. 				};
  1647. 				
  1648. 				if (
  1649. 					applyZoomPairSecond(pair2)
  1650. 					|| applyZoomPairSecond(pair1, getProgress(pair1[0], pair2[0]))
  1651. 					|| applyZoomPairSecond(pair0, getProgress(pair0[0], pair1[0]))
  1652. 				) {
  1653. 					return;
  1654. 				}
  1655. 				
  1656. 				zoom.value = pair0[0];
  1657. 			};
  1658. 		})();
  1659. 		
  1660. 		const getZoomPoints = (() => {
  1661. 			const getPoints = (fitZoom, doFlip) => {
  1662. 				const getGenericRotated = (x, y, angle) => {
  1663. 					const radius = Math.sqrt(x * x + y * y);
  1664. 					const pointTheta = getTheta(0, 0, x, y) + angle;
  1665. 					
  1666. 					return {
  1667. 						x: radius * Math.cos(pointTheta),
  1668. 						y: radius * Math.sin(pointTheta),
  1669. 					};
  1670. 				};
  1671. 				
  1672. 				const getRotated = (xRaw, yRaw) => {
  1673. 					// Multiplying by video dimensions to have the axes' scales match the video's
  1674. 					// Using midPoint's raw values would only work if points moved elliptically around the centre of rotation
  1675. 					const rotated = getGenericRotated(xRaw * video.clientWidth, yRaw * video.clientHeight, (DEGREES[90] - rotation.value) % DEGREES[180]);
  1676. 					
  1677. 					rotated.x /= video.clientWidth;
  1678. 					rotated.y /= video.clientHeight;
  1679. 					
  1680. 					return rotated;
  1681. 				};
  1682. 				
  1683. 				return [
  1684. 					{...getRotated(halfDimensions.viewport.width / video.clientWidth / fitZoom[0], 0), axis: doFlip ? 'y' : 'x'},
  1685. 					{...getRotated(0, halfDimensions.viewport.height / video.clientHeight / fitZoom[1]), axis: doFlip ? 'x' : 'y'},
  1686. 				];
  1687. 			};
  1688. 			
  1689. 			const getIntersection = (line, corner, middle) => {
  1690. 				const getIntersection = (line0, line1) => {
  1691. 					const a0 = line0[0].y - line0[1].y;
  1692. 					const b0 = line0[1].x - line0[0].x;
  1693. 					const c0 = line0[1].x * line0[0].y - line0[0].x * line0[1].y;
  1694. 					
  1695. 					const a1 = line1[0].y - line1[1].y;
  1696. 					const b1 = line1[1].x - line1[0].x;
  1697. 					const c1 = line1[1].x * line1[0].y - line1[0].x * line1[1].y;
  1698. 					
  1699. 					const d = a0 * b1 - b0 * a1;
  1700. 					
  1701. 					return {
  1702. 						x: (c0 * b1 - b0 * c1) / d,
  1703. 						y: (a0 * c1 - c0 * a1) / d,
  1704. 					};
  1705. 				};
  1706. 				
  1707. 				const {x, y} = getIntersection([{x: 0, y: 0}, middle], [line, corner]);
  1708. 				const progress = isThin ? (y - line.y) / (corner.y - line.y) : (x - line.x) / (corner.x - line.x);
  1709. 				
  1710. 				return {x, y, z: line.z / (1 - progress), c: line.y};
  1711. 			};
  1712. 			
  1713. 			const getIntersect = (yIntersect, corner, right, top) => {
  1714. 				const point0 = getIntersection(yIntersect, corner, right);
  1715. 				const point1 = getIntersection(yIntersect, corner, top);
  1716. 				
  1717. 				const [point, vpEnd] = point0.z > point1.z ? [point0, {...right}] : [point1, {...top}];
  1718. 				
  1719. 				if (Math.sign(point[vpEnd.axis]) !== Math.sign(vpEnd[vpEnd.axis])) {
  1720. 					vpEnd.x = -vpEnd.x;
  1721. 					vpEnd.y = -vpEnd.y;
  1722. 				}
  1723. 				
  1724. 				return {...point, vpEnd};
  1725. 			};
  1726. 			
  1727. 			// the angle from 0,0 to the center of the video edge angled towards the viewport's upper-right corner
  1728. 			const getQuadrantAngle = (isEvenQuadrant) => {
  1729. 				const angle = (rotation.value + DEGREES[360]) % DEGREES[90];
  1730. 				
  1731. 				return isEvenQuadrant ? angle : DEGREES[90] - angle;
  1732. 			};
  1733. 			
  1734. 			return () => {
  1735. 				const isEvenQuadrant = (Math.floor(rotation.value / DEGREES[90]) + 3) % 2 === 0;
  1736. 				const quadrantAngle = getQuadrantAngle(isEvenQuadrant);
  1737. 				
  1738. 				const progress = quadrantAngle / DEGREES[90] * -2 + 1;
  1739. 				const progressAngles = {
  1740. 					base: Math.atan(progress * viewportRatio),
  1741. 					side: Math.atan(progress * viewportRatioInverse),
  1742. 				};
  1743. 				const progressCosines = {
  1744. 					base: Math.cos(progressAngles.base),
  1745. 					side: Math.cos(progressAngles.side),
  1746. 				};
  1747. 				
  1748. 				const fitZoom = zoom.getFit(1, 1, true);
  1749. 				const points = getPoints(fitZoom, quadrantAngle >= DEGREES[45]);
  1750. 				
  1751. 				const sideIntersection = getIntersect(
  1752. 					((cornerAngle) => ({
  1753. 						x: 0,
  1754. 						y: (halfDimensions.video.height - halfDimensions.video.width * Math.tan(cornerAngle)) / video.clientHeight,
  1755. 						z: halfDimensions.viewport.width / (progressCosines.side * Math.abs(halfDimensions.video.width / Math.cos(cornerAngle))),
  1756. 					}))(quadrantAngle + progressAngles.side),
  1757. 					isEvenQuadrant ? {x: -0.5, y: 0.5} : {x: 0.5, y: 0.5},
  1758. 					...points,
  1759. 				);
  1760. 				
  1761. 				const baseIntersection = getIntersect(
  1762. 					((cornerAngle) => ({
  1763. 						x: 0,
  1764. 						y: (halfDimensions.video.height - halfDimensions.video.width * Math.tan(cornerAngle)) / video.clientHeight,
  1765. 						z: halfDimensions.viewport.height / (progressCosines.base * Math.abs(halfDimensions.video.width / Math.cos(cornerAngle))),
  1766. 					}))(DEGREES[90] - quadrantAngle - progressAngles.base),
  1767. 					isEvenQuadrant ? {x: 0.5, y: 0.5} : {x: -0.5, y: 0.5},
  1768. 					...points,
  1769. 				);
  1770. 				
  1771. 				const [originSide, originBase] = fitZoom.map((z) => ({x: 0, y: 0, z}));
  1772. 				
  1773. 				return isEvenQuadrant ?
  1774. 					[...[originSide, sideIntersection], ...[originBase, baseIntersection]] :
  1775. 					[...[originBase, baseIntersection], ...[originSide, sideIntersection]];
  1776. 			};
  1777. 		})();
  1778. 		
  1779. 		let zoomPoints;
  1780. 		
  1781. 		const getEnsureZoomPoints = (() => {
  1782. 			const updateLog = [];
  1783. 			let count = 0;
  1784. 			
  1785. 			return () => {
  1786. 				const zoomPointCache = new ViewportCache(rotation);
  1787. 				const callbackCache = new Cache(zoom);
  1788. 				const id = count++;
  1789. 				
  1790. 				return () => {
  1791. 					if (zoomPointCache.isStale()) {
  1792. 						updateLog.length = 0;
  1793. 						
  1794. 						zoomPoints = getZoomPoints();
  1795. 					}
  1796. 					
  1797. 					if (callbackCache.isStale() || !updateLog[id]) {
  1798. 						updateLog[id] = true;
  1799. 						
  1800. 						return true;
  1801. 					}
  1802. 					
  1803. 					return false;
  1804. 				};
  1805. 			};
  1806. 		})();
  1807. 		
  1808. 		const handlers = {
  1809. 			[LIMITS.static]: ({custom: ratio}) => {
  1810. 				const bound = 0.5 + (ratio - 0.5) / zoom.value;
  1811. 				
  1812. 				this.x = Math.max(-bound, Math.min(bound, this.x));
  1813. 				this.y = Math.max(-bound, Math.min(bound, this.y));
  1814. 			},
  1815. 			[LIMITS.fit]: (() => {
  1816. 				let boundApplyFrame;
  1817. 				
  1818. 				const ensure = getEnsureZoomPoints();
  1819. 				
  1820. 				return () => {
  1821. 					if (ensure()) {
  1822. 						boundApplyFrame = getBoundApplyFrame(...zoomPoints);
  1823. 					}
  1824. 					
  1825. 					boundApplyFrame();
  1826. 				};
  1827. 			})(),
  1828. 		};
  1829. 		
  1830. 		const snapHandlers = {
  1831. 			[LIMITS.fit]: (() => {
  1832. 				const ensure = getEnsureZoomPoints();
  1833. 				
  1834. 				return () => {
  1835. 					ensure();
  1836. 					
  1837. 					snapZoom(...zoomPoints);
  1838. 					
  1839. 					zoom.constrain();
  1840. 				};
  1841. 			})(),
  1842. 		};
  1843. 		
  1844. 		return (doZoom = false) => {
  1845. 			const {panLimit, snapPanLimit} = $config.get();
  1846. 			
  1847. 			if (doZoom) {
  1848. 				snapHandlers[snapPanLimit.type]?.();
  1849. 			}
  1850. 			
  1851. 			handlers[panLimit.type]?.(panLimit);
  1852. 			
  1853. 			this.apply();
  1854. 		};
  1855. 	})();
  1856. }();
  1857.  
  1858. const crop = new function () {
  1859. 	this.top = this.right = this.bottom = this.left = 0;
  1860. 	
  1861. 	this.getValues = () => ({top: this.top, right: this.right, bottom: this.bottom, left: this.left});
  1862. 	
  1863. 	this.reveal = () => {
  1864. 		this.top = this.right = this.bottom = this.left = 0;
  1865. 		
  1866. 		rule.remove();
  1867. 	};
  1868. 	
  1869. 	this.reset = () => {
  1870. 		this.reveal();
  1871. 		
  1872. 		actions.crop.reset();
  1873. 	};
  1874. 	
  1875. 	const rule = new css.Toggleable();
  1876. 	
  1877. 	this.apply = () => {
  1878. 		rule.remove();
  1879. 		rule.add(
  1880. 			`${SELECTOR_VIDEO}:not(.${this.CLASS_ABLE} *)`,
  1881. 			['clip-path', `inset(${this.top * 100}% ${this.right * 100}% ${this.bottom * 100}% ${this.left * 100}%)`],
  1882. 		);
  1883. 		
  1884. 		delete actions.reset.restore;
  1885. 		
  1886. 		glow.handleViewChange();
  1887. 		glow.reset();
  1888. 	};
  1889. 	
  1890. 	this.getDimensions = (width = video.clientWidth, height = video.clientHeight) => [
  1891. 		width * (1 - this.left - this.right),
  1892. 		height * (1 - this.top - this.bottom),
  1893. 	];
  1894. }();
  1895.  
  1896. // FUNCTIONALITY
  1897.  
  1898. const glow = (() => {
  1899. 	const videoCanvas = new OffscreenCanvas(0, 0);
  1900. 	const videoCtx = videoCanvas.getContext('2d', {alpha: false});
  1901. 	
  1902. 	const glowCanvas = document.createElement('canvas');
  1903. 	const glowCtx = glowCanvas.getContext('2d', {alpha: false});
  1904. 	
  1905. 	glowCanvas.style.setProperty('position', 'absolute');
  1906. 	
  1907. 	class Sector {
  1908. 		canvas = new OffscreenCanvas(0, 0);
  1909. 		ctx = this.canvas.getContext('2d', {alpha: false});
  1910. 		
  1911. 		update(doFill) {
  1912. 			if (doFill) {
  1913. 				this.fill();
  1914. 			} else {
  1915. 				this.shift();
  1916. 				this.take();
  1917. 			}
  1918. 			
  1919. 			this.giveEdge();
  1920. 			
  1921. 			if (this.hasCorners) {
  1922. 				this.giveCorners();
  1923. 			}
  1924. 		}
  1925. 	}
  1926. 	
  1927. 	class Side extends Sector {
  1928. 		setDimensions(doShiftRight, sWidth, sHeight, sx, sy, dx, dy, dWidth, dHeight) {
  1929. 			this.canvas.width = sWidth;
  1930. 			this.canvas.height = sHeight;
  1931. 			
  1932. 			this.shift = this.ctx.drawImage.bind(this.ctx, this.canvas, doShiftRight ? 1 : -1, 0);
  1933. 			
  1934. 			this.fill = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, 1, sHeight, 0, 0, sWidth, sHeight);
  1935. 			this.take = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, 1, sHeight, doShiftRight ? 0 : sWidth - 1, 0, 1, sHeight);
  1936. 			
  1937. 			this.giveEdge = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, sWidth, sHeight, dx, dy, dWidth, dHeight);
  1938. 			
  1939. 			if (dy === 0) {
  1940. 				this.hasCorners = false;
  1941. 				
  1942. 				return;
  1943. 			}
  1944. 			
  1945. 			this.hasCorners = true;
  1946. 			
  1947. 			const giveCorner0 = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, sWidth, 1, dx, 0, dWidth, dy);
  1948. 			const giveCorner1 = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, sHeight - 1, sWidth, 1, dx, dy + dHeight, dWidth, dy);
  1949. 			
  1950. 			this.giveCorners = () => {
  1951. 				giveCorner0();
  1952. 				giveCorner1();
  1953. 			};
  1954. 		}
  1955. 	}
  1956. 	
  1957. 	class Base extends Sector {
  1958. 		setDimensions(doShiftDown, sWidth, sHeight, sx, sy, dx, dy, dWidth, dHeight) {
  1959. 			this.canvas.width = sWidth;
  1960. 			this.canvas.height = sHeight;
  1961. 			
  1962. 			this.shift = this.ctx.drawImage.bind(this.ctx, this.canvas, 0, doShiftDown ? 1 : -1);
  1963. 			
  1964. 			this.fill = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, sWidth, 1, 0, 0, sWidth, sHeight);
  1965. 			this.take = this.ctx.drawImage.bind(this.ctx, videoCanvas, sx, sy, sWidth, 1, 0, doShiftDown ? 0 : sHeight - 1, sWidth, 1);
  1966. 			
  1967. 			this.giveEdge = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, sWidth, sHeight, dx, dy, dWidth, dHeight);
  1968. 			
  1969. 			if (dx === 0) {
  1970. 				this.hasCorners = false;
  1971. 				
  1972. 				return;
  1973. 			}
  1974. 			
  1975. 			this.hasCorners = true;
  1976. 			
  1977. 			const giveCorner0 = glowCtx.drawImage.bind(glowCtx, this.canvas, 0, 0, 1, sHeight, 0, dy, dx, dHeight);
  1978. 			const giveCorner1 = glowCtx.drawImage.bind(glowCtx, this.canvas, sWidth - 1, 0, 1, sHeight, dx + dWidth, dy, dx, dHeight);
  1979. 			
  1980. 			this.giveCorners = () => {
  1981. 				giveCorner0();
  1982. 				giveCorner1();
  1983. 			};
  1984. 		}
  1985. 		
  1986. 		setClipPath(points) {
  1987. 			this.clipPath = new Path2D();
  1988. 			
  1989. 			this.clipPath.moveTo(...points[0]);
  1990. 			this.clipPath.lineTo(...points[1]);
  1991. 			this.clipPath.lineTo(...points[2]);
  1992. 			this.clipPath.closePath();
  1993. 		}
  1994. 		
  1995. 		update(doFill) {
  1996. 			glowCtx.save();
  1997. 			
  1998. 			glowCtx.clip(this.clipPath);
  1999. 			
  2000. 			super.update(doFill);
  2001. 			
  2002. 			glowCtx.restore();
  2003. 		}
  2004. 	}
  2005. 	
  2006. 	const components = {
  2007. 		left: new Side(),
  2008. 		right: new Side(),
  2009. 		top: new Base(),
  2010. 		bottom: new Base(),
  2011. 	};
  2012. 	
  2013. 	const setComponentDimensions = (sampleCount, size, isInset, doFlip) => {
  2014. 		const [croppedWidth, croppedHeight] = crop.getDimensions();
  2015. 		const halfCanvas = {x: Math.ceil(glowCanvas.width / 2), y: Math.ceil(glowCanvas.height / 2)};
  2016. 		const halfVideo = {x: croppedWidth / 2, y: croppedHeight / 2};
  2017. 		const dWidth = Math.ceil(Math.min(halfVideo.x, size));
  2018. 		const dHeight = Math.ceil(Math.min(halfVideo.y, size));
  2019. 		const [dWidthScale, dHeightScale, sideWidth, sideHeight] = isInset ?
  2020. 			[0, 0, videoCanvas.width / croppedWidth * glowCanvas.width, videoCanvas.height / croppedHeight * glowCanvas.height] :
  2021. 			[halfCanvas.x - halfVideo.x, halfCanvas.y - halfVideo.y, croppedWidth, croppedHeight];
  2022. 		
  2023. 		components.left.setDimensions(!doFlip, sampleCount, videoCanvas.height, 0, 0, 0, dHeightScale, dWidth, sideHeight);
  2024. 		
  2025. 		components.right.setDimensions(doFlip, sampleCount, videoCanvas.height, videoCanvas.width - 1, 0, glowCanvas.width - dWidth, dHeightScale, dWidth, sideHeight);
  2026. 		
  2027. 		components.top.setDimensions(!doFlip, videoCanvas.width, sampleCount, 0, 0, dWidthScale, 0, sideWidth, dHeight);
  2028. 		components.top.setClipPath([[0, 0], [halfCanvas.x, halfCanvas.y], [glowCanvas.width, 0]]);
  2029. 		
  2030. 		components.bottom.setDimensions(doFlip, videoCanvas.width, sampleCount, 0, videoCanvas.height - 1, dWidthScale, glowCanvas.height - dHeight, sideWidth, dHeight);
  2031. 		components.bottom.setClipPath([[0, glowCanvas.height], [halfCanvas.x, halfCanvas.y], [glowCanvas.width, glowCanvas.height]]);
  2032. 	};
  2033. 	
  2034. 	class Instance {
  2035. 		constructor() {
  2036. 			const {filter, sampleCount, size, end, doFlip} = $config.get().glow;
  2037. 			
  2038. 			// Setup canvases
  2039. 			
  2040. 			glowCanvas.style.setProperty('filter', filter);
  2041. 			
  2042. 			[glowCanvas.width, glowCanvas.height] = crop.getDimensions().map((dimension) => dimension * end);
  2043. 			
  2044. 			glowCanvas.style.setProperty('left', `${crop.left * 100 + (1 - end) * (1 - crop.left - crop.right) * 50}%`);
  2045. 			glowCanvas.style.setProperty('top', `${crop.top * 100 + (1 - end) * (1 - crop.top - crop.bottom) * 50}%`);
  2046. 			
  2047. 			[videoCanvas.width, videoCanvas.height] = crop.getDimensions(video.videoWidth, video.videoHeight);
  2048. 			
  2049. 			setComponentDimensions(sampleCount, size, end <= 1, doFlip);
  2050. 			
  2051. 			this.update(true);
  2052. 		}
  2053. 		
  2054. 		update(doFill = false) {
  2055. 			videoCtx.drawImage(
  2056. 				video,
  2057. 				crop.left * video.videoWidth,
  2058. 				crop.top * video.videoHeight,
  2059. 				video.videoWidth * (1 - crop.left - crop.right),
  2060. 				video.videoHeight * (1 - crop.top - crop.bottom),
  2061. 				0,
  2062. 				0,
  2063. 				videoCanvas.width,
  2064. 				videoCanvas.height,
  2065. 			);
  2066. 			
  2067. 			components.left.update(doFill);
  2068. 			components.right.update(doFill);
  2069. 			components.top.update(doFill);
  2070. 			components.bottom.update(doFill);
  2071. 		}
  2072. 	}
  2073. 	
  2074. 	return new function () {
  2075. 		const container = document.createElement('div');
  2076. 		
  2077. 		container.style.display = 'none';
  2078. 		
  2079. 		container.appendChild(glowCanvas);
  2080. 		containers.background.appendChild(container);
  2081. 		
  2082. 		this.isHidden = false;
  2083. 		
  2084. 		let instance, startCopyLoop, stopCopyLoop;
  2085. 		
  2086. 		const play = () => {
  2087. 			if (!video.paused && !this.isHidden && !enabler.isHidingGlow) {
  2088. 				startCopyLoop?.();
  2089. 			}
  2090. 		};
  2091. 		
  2092. 		const fill = () => {
  2093. 			if (!this.isHidden) {
  2094. 				instance.update(true);
  2095. 			}
  2096. 		};
  2097. 		
  2098. 		const handleVisibilityChange = () => {
  2099. 			if (document.hidden) {
  2100. 				stopCopyLoop();
  2101. 			} else {
  2102. 				play();
  2103. 			}
  2104. 		};
  2105. 		
  2106. 		this.handleSizeChange = () => {
  2107. 			instance = new Instance();
  2108. 		};
  2109. 		
  2110. 		// set up pausing if glow isn't visible
  2111. 		this.handleViewChange = (() => {
  2112. 			const cache = new Cache(rotation, zoom);
  2113. 			
  2114. 			let corners;
  2115. 			
  2116. 			return (doForce = false) => {
  2117. 				if (doForce || cache.isStale()) {
  2118. 					corners = getRotatedCorners(viewport.clientWidth / 2 / zoom.value, viewport.clientHeight / 2 / zoom.value);
  2119. 				}
  2120. 				
  2121. 				const videoX = position.x * video.clientWidth;
  2122. 				const videoY = position.y * video.clientHeight;
  2123. 				
  2124. 				for (const corner of corners) {
  2125. 					if (
  2126. 						// unpause if the viewport extends more than 1 pixel beyond a video edge
  2127. 						videoX + corner.x > (0.5 - crop.right) * video.clientWidth + 1
  2128. 						|| videoX - corner.x < (crop.left - 0.5) * video.clientWidth - 1
  2129. 						|| videoY + corner.y > (0.5 - crop.top) * video.clientHeight + 1
  2130. 						|| videoY - corner.y < (crop.bottom - 0.5) * video.clientHeight - 1
  2131. 					) {
  2132. 						// fill if newly visible
  2133. 						if (this.isHidden) {
  2134. 							instance?.update(true);
  2135. 						}
  2136. 						
  2137. 						this.isHidden = false;
  2138. 						
  2139. 						glowCanvas.style.removeProperty('visibility');
  2140. 						
  2141. 						play();
  2142. 						
  2143. 						return;
  2144. 					}
  2145. 				}
  2146. 				
  2147. 				this.isHidden = true;
  2148. 				
  2149. 				glowCanvas.style.visibility = 'hidden';
  2150. 				
  2151. 				stopCopyLoop?.();
  2152. 			};
  2153. 		})();
  2154. 		
  2155. 		const loop = {};
  2156. 		
  2157. 		this.start = () => {
  2158. 			const config = $config.get().glow;
  2159. 			
  2160. 			if (!config) {
  2161. 				return;
  2162. 			}
  2163. 			
  2164. 			if (!enabler.isHidingGlow) {
  2165. 				container.style.removeProperty('display');
  2166. 			}
  2167. 			
  2168. 			// todo handle this?
  2169. 			if (crop.left + crop.right >= 1 || crop.top + crop.bottom >= 1) {
  2170. 				return;
  2171. 			}
  2172. 			
  2173. 			let loopId = -1;
  2174. 			
  2175. 			if (loop.interval !== config.interval || loop.fps !== config.fps) {
  2176. 				loop.interval = config.interval;
  2177. 				loop.fps = config.fps;
  2178. 				loop.wasSlow = false;
  2179. 				loop.throttleCount = 0;
  2180. 			}
  2181. 			
  2182. 			stopCopyLoop = () => ++loopId;
  2183. 			
  2184. 			instance = new Instance();
  2185. 			
  2186. 			startCopyLoop = async () => {
  2187. 				const id = ++loopId;
  2188. 				
  2189. 				await new Promise((resolve) => {
  2190. 					window.setTimeout(resolve, config.interval);
  2191. 				});
  2192. 				
  2193. 				while (id === loopId) {
  2194. 					const startTime = Date.now();
  2195. 					
  2196. 					instance.update();
  2197. 					
  2198. 					const delay = loop.interval - (Date.now() - startTime);
  2199. 					
  2200. 					if (delay <= 0) {
  2201. 						if (loop.wasSlow) {
  2202. 							loop.interval = 1000 / (loop.fps - ++loop.throttleCount);
  2203. 						}
  2204. 						
  2205. 						loop.wasSlow = !loop.wasSlow;
  2206. 						
  2207. 						continue;
  2208. 					}
  2209. 					
  2210. 					if (delay > 2 && loop.throttleCount > 0) {
  2211. 						console.warn(`[${GM.info.script.name}] Glow update frequency reduced from ${loop.fps} hertz to ${loop.fps - loop.throttleCount} hertz due to poor performance.`);
  2212. 						
  2213. 						loop.fps -= loop.throttleCount;
  2214. 						
  2215. 						loop.throttleCount = 0;
  2216. 					}
  2217. 					
  2218. 					loop.wasSlow = false;
  2219. 					
  2220. 					await new Promise((resolve) => {
  2221. 						window.setTimeout(resolve, delay);
  2222. 					});
  2223. 				}
  2224. 			};
  2225. 			
  2226. 			play();
  2227. 			
  2228. 			video.addEventListener('pause', stopCopyLoop);
  2229. 			video.addEventListener('play', play);
  2230. 			video.addEventListener('seeked', fill);
  2231. 			
  2232. 			document.addEventListener('visibilitychange', handleVisibilityChange);
  2233. 		};
  2234. 		
  2235. 		const priorCrop = {};
  2236. 		
  2237. 		this.hide = () => {
  2238. 			Object.assign(priorCrop, crop);
  2239. 			
  2240. 			stopCopyLoop?.();
  2241. 			
  2242. 			container.style.display = 'none';
  2243. 		};
  2244. 		
  2245. 		this.show = () => {
  2246. 			if (Object.entries(priorCrop).some(([edge, value]) => crop[edge] !== value)) {
  2247. 				this.reset();
  2248. 			} else {
  2249. 				play();
  2250. 			}
  2251. 			
  2252. 			container.style.removeProperty('display');
  2253. 		};
  2254. 		
  2255. 		this.stop = () => {
  2256. 			this.hide();
  2257. 			
  2258. 			video.removeEventListener('pause', stopCopyLoop);
  2259. 			video.removeEventListener('play', play);
  2260. 			video.removeEventListener('seeked', fill);
  2261. 			
  2262. 			document.removeEventListener('visibilitychange', handleVisibilityChange);
  2263. 			
  2264. 			startCopyLoop = undefined;
  2265. 			stopCopyLoop = undefined;
  2266. 		};
  2267. 		
  2268. 		this.reset = () => {
  2269. 			this.stop();
  2270. 			
  2271. 			this.start();
  2272. 		};
  2273. 	}();
  2274. })();
  2275.  
  2276. const peek = (stop = false) => {
  2277. 	const prior = {
  2278. 		zoom: zoom.value,
  2279. 		rotation: rotation.value,
  2280. 		crop: crop.getValues(),
  2281. 		position: position.getValues(),
  2282. 	};
  2283. 	
  2284. 	position.reset();
  2285. 	rotation.reset();
  2286. 	zoom.reset();
  2287. 	crop.reset();
  2288. 	
  2289. 	glow[stop ? 'stop' : 'reset']();
  2290. 	
  2291. 	return () => {
  2292. 		zoom.value = prior.zoom;
  2293. 		rotation.value = prior.rotation;
  2294. 		Object.assign(position, prior.position);
  2295. 		Object.assign(crop, prior.crop);
  2296. 		
  2297. 		actions.crop.set(prior.crop);
  2298. 		
  2299. 		position.apply();
  2300. 		rotation.apply();
  2301. 		zoom.apply();
  2302. 		crop.apply();
  2303. 	};
  2304. };
  2305.  
  2306. const actions = (() => {
  2307. 	const drag = (event, clickCallback, moveCallback, target = video) => new Promise((resolve) => {
  2308. 		event.stopImmediatePropagation();
  2309. 		event.preventDefault();
  2310. 		
  2311. 		// window blur events don't fire if devtools is open
  2312. 		stopDrag?.();
  2313. 		
  2314. 		target.setPointerCapture(event.pointerId);
  2315. 		
  2316. 		css.tag(enabler.CLASS_DRAGGING);
  2317. 		
  2318. 		const cancel = (event) => {
  2319. 			event.stopImmediatePropagation();
  2320. 			event.preventDefault();
  2321. 		};
  2322. 		
  2323. 		document.addEventListener('click', cancel, true);
  2324. 		document.addEventListener('dblclick', cancel, true);
  2325. 		
  2326. 		const clickDisallowListener = ({clientX, clientY}) => {
  2327. 			const {clickCutoff} = $config.get();
  2328. 			const distance = Math.abs(event.clientX - clientX) + Math.abs(event.clientY - clientY);
  2329. 			
  2330. 			if (distance >= clickCutoff) {
  2331. 				target.removeEventListener('pointermove', clickDisallowListener);
  2332. 				target.removeEventListener('pointerup', clickCallback);
  2333. 			}
  2334. 		};
  2335. 		
  2336. 		if (clickCallback) {
  2337. 			target.addEventListener('pointermove', clickDisallowListener);
  2338. 			target.addEventListener('pointerup', clickCallback, {once: true});
  2339. 		}
  2340. 		
  2341. 		target.addEventListener('pointermove', moveCallback);
  2342. 		
  2343. 		stopDrag = () => {
  2344. 			css.tag(enabler.CLASS_DRAGGING, false);
  2345. 			
  2346. 			target.removeEventListener('pointermove', moveCallback);
  2347. 			
  2348. 			if (clickCallback) {
  2349. 				target.removeEventListener('pointermove', clickDisallowListener);
  2350. 				target.removeEventListener('pointerup', clickCallback);
  2351. 			}
  2352. 			
  2353. 			// delay removing listeners for events that happen after pointerup
  2354. 			window.setTimeout(() => {
  2355. 				document.removeEventListener('dblclick', cancel, true);
  2356. 				document.removeEventListener('click', cancel, true);
  2357. 			}, 0);
  2358. 			
  2359. 			window.removeEventListener('blur', stopDrag);
  2360. 			target.removeEventListener('pointerup', stopDrag);
  2361. 			
  2362. 			target.releasePointerCapture(event.pointerId);
  2363. 			
  2364. 			stopDrag = undefined;
  2365. 			
  2366. 			enabler.handleChange();
  2367. 			
  2368. 			resolve();
  2369. 		};
  2370. 		
  2371. 		window.addEventListener('blur', stopDrag);
  2372. 		target.addEventListener('pointerup', stopDrag);
  2373. 	});
  2374. 	
  2375. 	const getOnScroll = (() => {
  2376. 		// https://stackoverflow.com/a/30134826
  2377. 		const multipliers = [1, 40, 800];
  2378. 		
  2379. 		return (callback) => (event) => {
  2380. 			event.stopImmediatePropagation();
  2381. 			event.preventDefault();
  2382. 			
  2383. 			if (event.deltaY !== 0) {
  2384. 				callback(event.deltaY * multipliers[event.deltaMode]);
  2385. 			}
  2386. 		};
  2387. 	})();
  2388. 	
  2389. 	const addListeners = ({onMouseDown, onRightClick, onScroll}, doAdd = true) => {
  2390. 		const property = `${doAdd ? 'add' : 'remove'}EventListener`;
  2391. 		
  2392. 		altTarget[property]('pointerdown', onMouseDown);
  2393. 		altTarget[property]('contextmenu', onRightClick, true);
  2394. 		altTarget[property]('wheel', onScroll);
  2395. 	};
  2396. 	
  2397. 	return {
  2398. 		crop: new function () {
  2399. 			let top = 0, right = 0, bottom = 0, left = 0, handle;
  2400. 			
  2401. 			const values = {};
  2402. 			
  2403. 			Object.defineProperty(values, 'top', {get: () => top, set: (value) => top = value});
  2404. 			Object.defineProperty(values, 'right', {get: () => right, set: (value) => right = value});
  2405. 			Object.defineProperty(values, 'bottom', {get: () => bottom, set: (value) => bottom = value});
  2406. 			Object.defineProperty(values, 'left', {get: () => left, set: (value) => left = value});
  2407. 			
  2408. 			class Button {
  2409. 				// allowance for rounding errors
  2410. 				static ALLOWANCE_HANDLE = 0.0001;
  2411. 				
  2412. 				static CLASS_HANDLE = 'viewfind-crop-handle';
  2413. 				static CLASS_EDGES = {
  2414. 					left: 'viewfind-crop-left',
  2415. 					top: 'viewfind-crop-top',
  2416. 					right: 'viewfind-crop-right',
  2417. 					bottom: 'viewfind-crop-bottom',
  2418. 				};
  2419. 				
  2420. 				static OPPOSITES = {
  2421. 					left: 'right',
  2422. 					right: 'left',
  2423. 					
  2424. 					top: 'bottom',
  2425. 					bottom: 'top',
  2426. 				};
  2427. 				
  2428. 				callbacks = [];
  2429. 				
  2430. 				element = document.createElement('div');
  2431. 				
  2432. 				constructor(...edges) {
  2433. 					this.edges = edges;
  2434. 					
  2435. 					this.isHandle = true;
  2436. 					
  2437. 					this.element.style.position = 'absolute';
  2438. 					this.element.style.pointerEvents = 'all';
  2439. 					
  2440. 					for (const edge of edges) {
  2441. 						this.element.style[edge] = '0';
  2442. 						
  2443. 						this.element.classList.add(Button.CLASS_EDGES[edge]);
  2444. 						
  2445. 						this.element.style.setProperty(`border-${Button.OPPOSITES[edge]}-width`, '1px');
  2446. 					}
  2447. 					
  2448. 					this.element.addEventListener('contextmenu', (event) => {
  2449. 						event.stopPropagation();
  2450. 						event.preventDefault();
  2451. 						
  2452. 						this.reset(false);
  2453. 					});
  2454. 					
  2455. 					this.element.addEventListener('pointerdown', (() => {
  2456. 						const clickListener = ({offsetX, offsetY, target}) => {
  2457. 							this.set({
  2458. 								width: (this.edges.includes('left') ? offsetX : target.clientWidth - offsetX) / video.clientWidth,
  2459. 								height: (this.edges.includes('top') ? offsetY : target.clientHeight - offsetY) / video.clientHeight,
  2460. 							}, false);
  2461. 						};
  2462. 						
  2463. 						const getDragListener = (event, target) => {
  2464. 							const getWidth = (() => {
  2465. 								if (this.edges.includes('left')) {
  2466. 									const position = this.element.clientWidth - event.offsetX;
  2467. 									
  2468. 									return ({offsetX}) => offsetX + position;
  2469. 								}
  2470. 								
  2471. 								const position = target.offsetWidth + event.offsetX;
  2472. 								
  2473. 								return ({offsetX}) => position - offsetX;
  2474. 							})();
  2475. 							
  2476. 							const getHeight = (() => {
  2477. 								if (this.edges.includes('top')) {
  2478. 									const position = this.element.clientHeight - event.offsetY;
  2479. 									
  2480. 									return ({offsetY}) => offsetY + position;
  2481. 								}
  2482. 								
  2483. 								const position = target.offsetHeight + event.offsetY;
  2484. 								
  2485. 								return ({offsetY}) => position - offsetY;
  2486. 							})();
  2487. 							
  2488. 							return (event) => {
  2489. 								this.set({
  2490. 									width: getWidth(event) / video.clientWidth,
  2491. 									height: getHeight(event) / video.clientHeight,
  2492. 								});
  2493. 							};
  2494. 						};
  2495. 						
  2496. 						return async (event) => {
  2497. 							if (event.buttons === 1) {
  2498. 								const target = this.element.parentElement;
  2499. 								
  2500. 								if (this.isHandle) {
  2501. 									this.setPanel();
  2502. 								}
  2503. 								
  2504. 								await drag(event, clickListener, getDragListener(event, target), target);
  2505. 								
  2506. 								this.updateCounterpart();
  2507. 							}
  2508. 						};
  2509. 					})());
  2510. 				}
  2511. 				
  2512. 				notify() {
  2513. 					for (const callback of this.callbacks) {
  2514. 						callback();
  2515. 					}
  2516. 				}
  2517. 				
  2518. 				set isHandle(value) {
  2519. 					this._isHandle = value;
  2520. 					
  2521. 					this.element.classList[value ? 'add' : 'remove'](Button.CLASS_HANDLE);
  2522. 				}
  2523. 				
  2524. 				get isHandle() {
  2525. 					return this._isHandle;
  2526. 				}
  2527. 				
  2528. 				reset() {
  2529. 					this.isHandle = true;
  2530. 					
  2531. 					for (const edge of this.edges) {
  2532. 						values[edge] = 0;
  2533. 					}
  2534. 				}
  2535. 			}
  2536. 			
  2537. 			class EdgeButton extends Button {
  2538. 				constructor(edge) {
  2539. 					super(edge);
  2540. 					
  2541. 					this.edge = edge;
  2542. 				}
  2543. 				
  2544. 				updateCounterpart() {
  2545. 					if (this.counterpart.isHandle) {
  2546. 						this.counterpart.setHandle();
  2547. 					}
  2548. 				}
  2549. 				
  2550. 				setCrop(value = 0) {
  2551. 					values[this.edge] = value;
  2552. 				}
  2553. 				
  2554. 				setPanel() {
  2555. 					this.isHandle = false;
  2556. 					
  2557. 					this.setCrop(handle);
  2558. 					
  2559. 					this.setHandle();
  2560. 				}
  2561. 			}
  2562. 			
  2563. 			class SideButton extends EdgeButton {
  2564. 				flow() {
  2565. 					let size = 1;
  2566. 					
  2567. 					if (top <= Button.ALLOWANCE_HANDLE) {
  2568. 						size -= handle;
  2569. 						
  2570. 						this.element.style.top = `${handle * 100}%`;
  2571. 					} else {
  2572. 						size -= top;
  2573. 						
  2574. 						this.element.style.top = `${top * 100}%`;
  2575. 					}
  2576. 					
  2577. 					if (bottom <= Button.ALLOWANCE_HANDLE) {
  2578. 						size -= handle;
  2579. 					} else {
  2580. 						size -= bottom;
  2581. 					}
  2582. 					
  2583. 					this.element.style.height = `${Math.max(0, size * 100)}%`;
  2584. 				}
  2585. 				
  2586. 				setBounds(counterpart, components) {
  2587. 					this.counterpart = components[counterpart];
  2588. 					
  2589. 					components.top.callbacks.push(() => {
  2590. 						this.flow();
  2591. 					});
  2592. 					
  2593. 					components.bottom.callbacks.push(() => {
  2594. 						this.flow();
  2595. 					});
  2596. 				}
  2597. 				
  2598. 				setHandle(doNotify = true) {
  2599. 					this.element.style.width = `${Math.min(1 - values[this.counterpart.edge], handle) * 100}%`;
  2600. 					
  2601. 					if (doNotify) {
  2602. 						this.notify();
  2603. 					}
  2604. 				}
  2605. 				
  2606. 				set({width}, doUpdateCounterpart = true) {
  2607. 					if (this.isHandle !== (this.isHandle = width <= Button.ALLOWANCE_HANDLE)) {
  2608. 						this.flow();
  2609. 					}
  2610. 					
  2611. 					if (doUpdateCounterpart) {
  2612. 						this.updateCounterpart();
  2613. 					}
  2614. 					
  2615. 					if (this.isHandle) {
  2616. 						this.setCrop();
  2617. 						
  2618. 						this.setHandle();
  2619. 						
  2620. 						return;
  2621. 					}
  2622. 					
  2623. 					const size = Math.min(1 - values[this.counterpart.edge], width);
  2624. 					
  2625. 					this.setCrop(size);
  2626. 					
  2627. 					this.element.style.width = `${size * 100}%`;
  2628. 					
  2629. 					this.notify();
  2630. 				}
  2631. 				
  2632. 				reset(isGeneral = true) {
  2633. 					super.reset();
  2634. 					
  2635. 					if (isGeneral) {
  2636. 						this.element.style.top = `${handle * 100}%`;
  2637. 						this.element.style.height = `${(0.5 - handle) * 200}%`;
  2638. 						this.element.style.width = `${handle * 100}%`;
  2639. 						
  2640. 						return;
  2641. 					}
  2642. 					
  2643. 					this.flow();
  2644. 					
  2645. 					this.setHandle();
  2646. 					
  2647. 					this.updateCounterpart();
  2648. 				}
  2649. 			}
  2650. 			
  2651. 			class BaseButton extends EdgeButton {
  2652. 				flow() {
  2653. 					let size = 1;
  2654. 					
  2655. 					if (left <= Button.ALLOWANCE_HANDLE) {
  2656. 						size -= handle;
  2657. 						
  2658. 						this.element.style.left = `${handle * 100}%`;
  2659. 					} else {
  2660. 						size -= left;
  2661. 						
  2662. 						this.element.style.left = `${left * 100}%`;
  2663. 					}
  2664. 					
  2665. 					if (right <= Button.ALLOWANCE_HANDLE) {
  2666. 						size -= handle;
  2667. 					} else {
  2668. 						size -= right;
  2669. 					}
  2670. 					
  2671. 					this.element.style.width = `${Math.max(0, size) * 100}%`;
  2672. 				}
  2673. 				
  2674. 				setBounds(counterpart, components) {
  2675. 					this.counterpart = components[counterpart];
  2676. 					
  2677. 					components.left.callbacks.push(() => {
  2678. 						this.flow();
  2679. 					});
  2680. 					
  2681. 					components.right.callbacks.push(() => {
  2682. 						this.flow();
  2683. 					});
  2684. 				}
  2685. 				
  2686. 				setHandle(doNotify = true) {
  2687. 					this.element.style.height = `${Math.min(1 - values[this.counterpart.edge], handle) * 100}%`;
  2688. 					
  2689. 					if (doNotify) {
  2690. 						this.notify();
  2691. 					}
  2692. 				}
  2693. 				
  2694. 				set({height}, doUpdateCounterpart = false) {
  2695. 					if (this.isHandle !== (this.isHandle = height <= Button.ALLOWANCE_HANDLE)) {
  2696. 						this.flow();
  2697. 					}
  2698. 					
  2699. 					if (doUpdateCounterpart) {
  2700. 						this.updateCounterpart();
  2701. 					}
  2702. 					
  2703. 					if (this.isHandle) {
  2704. 						this.setCrop();
  2705. 						
  2706. 						this.setHandle();
  2707. 						
  2708. 						return;
  2709. 					}
  2710. 					
  2711. 					const size = Math.min(1 - values[this.counterpart.edge], height);
  2712. 					
  2713. 					this.setCrop(size);
  2714. 					
  2715. 					this.element.style.height = `${size * 100}%`;
  2716. 					
  2717. 					this.notify();
  2718. 				}
  2719. 				
  2720. 				reset(isGeneral = true) {
  2721. 					super.reset();
  2722. 					
  2723. 					if (isGeneral) {
  2724. 						this.element.style.left = `${handle * 100}%`;
  2725. 						this.element.style.width = `${(0.5 - handle) * 200}%`;
  2726. 						this.element.style.height = `${handle * 100}%`;
  2727. 						
  2728. 						return;
  2729. 					}
  2730. 					
  2731. 					this.flow();
  2732. 					
  2733. 					this.setHandle();
  2734. 					
  2735. 					this.updateCounterpart();
  2736. 				}
  2737. 			}
  2738. 			
  2739. 			class CornerButton extends Button {
  2740. 				static CLASS_NAME = 'viewfind-crop-corner';
  2741. 				
  2742. 				constructor(sectors, ...edges) {
  2743. 					super(...edges);
  2744. 					
  2745. 					this.element.classList.add(CornerButton.CLASS_NAME);
  2746. 					
  2747. 					this.sectors = sectors;
  2748. 					
  2749. 					for (const sector of sectors) {
  2750. 						sector.callbacks.push(this.flow.bind(this));
  2751. 					}
  2752. 				}
  2753. 				
  2754. 				flow() {
  2755. 					let isHandle = true;
  2756. 					
  2757. 					if (this.sectors[0].isHandle) {
  2758. 						this.element.style.width = `${Math.min(1 - values[this.sectors[0].counterpart.edge], handle) * 100}%`;
  2759. 					} else {
  2760. 						this.element.style.width = `${values[this.edges[0]] * 100}%`;
  2761. 						
  2762. 						isHandle = false;
  2763. 					}
  2764. 					
  2765. 					if (this.sectors[1].isHandle) {
  2766. 						this.element.style.height = `${Math.min(1 - values[this.sectors[1].counterpart.edge], handle) * 100}%`;
  2767. 					} else {
  2768. 						this.element.style.height = `${values[this.edges[1]] * 100}%`;
  2769. 						
  2770. 						isHandle = false;
  2771. 					}
  2772. 					
  2773. 					this.isHandle = isHandle;
  2774. 				}
  2775. 				
  2776. 				updateCounterpart() {
  2777. 					for (const sector of this.sectors) {
  2778. 						sector.updateCounterpart();
  2779. 					}
  2780. 				}
  2781. 				
  2782. 				set(size) {
  2783. 					for (const sector of this.sectors) {
  2784. 						sector.set(size);
  2785. 					}
  2786. 				}
  2787. 				
  2788. 				reset(isGeneral = true) {
  2789. 					this.isHandle = true;
  2790. 					
  2791. 					this.element.style.width = `${handle * 100}%`;
  2792. 					this.element.style.height = `${handle * 100}%`;
  2793. 					
  2794. 					if (isGeneral) {
  2795. 						return;
  2796. 					}
  2797. 					
  2798. 					for (const sector of this.sectors) {
  2799. 						sector.reset(false);
  2800. 					}
  2801. 				}
  2802. 				
  2803. 				setPanel() {
  2804. 					for (const sector of this.sectors) {
  2805. 						sector.setPanel();
  2806. 					}
  2807. 				}
  2808. 			}
  2809. 			
  2810. 			this.CODE = 'crop';
  2811. 			
  2812. 			this.CLASS_ABLE = 'viewfind-action-able-crop';
  2813. 			
  2814. 			const container = document.createElement('div');
  2815. 			
  2816. 			// todo ditch the containers object
  2817. 			container.style.width = container.style.height = 'inherit';
  2818. 			
  2819. 			containers.foreground.append(container);
  2820. 			
  2821. 			this.reset = () => {
  2822. 				for (const component of Object.values(this.components)) {
  2823. 					component.reset(true);
  2824. 				}
  2825. 			};
  2826. 			
  2827. 			this.onRightClick = (event) => {
  2828. 				if (event.target.parentElement.id === container.id) {
  2829. 					return;
  2830. 				}
  2831. 				
  2832. 				event.stopPropagation();
  2833. 				event.preventDefault();
  2834. 				
  2835. 				if (stopDrag) {
  2836. 					return;
  2837. 				}
  2838. 				
  2839. 				this.reset();
  2840. 			};
  2841. 			
  2842. 			this.onScroll = getOnScroll((distance) => {
  2843. 				const increment = distance * $config.get().speeds.crop / zoom.value;
  2844. 				
  2845. 				this.components.top.set({height: top + Math.min((1 - top - bottom) / 2, increment)});
  2846. 				this.components.left.set({width: left + Math.min((1 - left - right) / 2, increment)});
  2847. 				
  2848. 				this.components.bottom.set({height: bottom + increment});
  2849. 				this.components.right.set({width: right + increment});
  2850. 			});
  2851. 			
  2852. 			this.onMouseDown = (() => {
  2853. 				const getDragListener = () => {
  2854. 					const multiplier = $config.get().multipliers.crop;
  2855. 					
  2856. 					const setX = ((right, left, change) => {
  2857. 						const clamped = Math.max(-left, Math.min(right, change * multiplier / video.clientWidth));
  2858. 						
  2859. 						this.components.left.set({width: left + clamped});
  2860. 						this.components.right.set({width: right - clamped});
  2861. 					}).bind(undefined, right, left);
  2862. 					
  2863. 					const setY = ((top, bottom, change) => {
  2864. 						const clamped = Math.max(-top, Math.min(bottom, change * multiplier / video.clientHeight));
  2865. 						
  2866. 						this.components.top.set({height: top + clamped});
  2867. 						
  2868. 						this.components.bottom.set({height: bottom - clamped});
  2869. 					}).bind(undefined, top, bottom);
  2870. 					
  2871. 					let priorEvent;
  2872. 					
  2873. 					return ({offsetX, offsetY}) => {
  2874. 						if (!priorEvent) {
  2875. 							priorEvent = {offsetX, offsetY};
  2876. 							
  2877. 							return;
  2878. 						}
  2879. 						
  2880. 						setX(offsetX - priorEvent.offsetX);
  2881. 						setY(offsetY - priorEvent.offsetY);
  2882. 					};
  2883. 				};
  2884. 				
  2885. 				const clickListener = () => {
  2886. 					zoom.value = zoom.getFit(1 - left - right, 1 - top - bottom);
  2887. 					
  2888. 					zoom.constrain();
  2889. 					
  2890. 					position.x = (left - right) / 2;
  2891. 					position.y = (bottom - top) / 2;
  2892. 					
  2893. 					position.constrain();
  2894. 				};
  2895. 				
  2896. 				return (event) => {
  2897. 					if (event.buttons === 1) {
  2898. 						drag(event, clickListener, getDragListener(), container);
  2899. 					}
  2900. 				};
  2901. 			})();
  2902. 			
  2903. 			this.components = {
  2904. 				top: new BaseButton('top'),
  2905. 				right: new SideButton('right'),
  2906. 				bottom: new BaseButton('bottom'),
  2907. 				left: new SideButton('left'),
  2908. 			};
  2909. 			
  2910. 			this.components.top.setBounds('bottom', this.components);
  2911. 			this.components.right.setBounds('left', this.components);
  2912. 			this.components.bottom.setBounds('top', this.components);
  2913. 			this.components.left.setBounds('right', this.components);
  2914. 			
  2915. 			this.components.topLeft = new CornerButton([this.components.left, this.components.top], 'left', 'top');
  2916. 			this.components.topRight = new CornerButton([this.components.right, this.components.top], 'right', 'top');
  2917. 			this.components.bottomLeft = new CornerButton([this.components.left, this.components.bottom], 'left', 'bottom');
  2918. 			this.components.bottomRight = new CornerButton([this.components.right, this.components.bottom], 'right', 'bottom');
  2919. 			
  2920. 			container.append(...Object.values(this.components).map(({element}) => element));
  2921. 			
  2922. 			this.set = ({top, right, bottom, left}) => {
  2923. 				this.components.top.set({height: top});
  2924. 				this.components.right.set({width: right});
  2925. 				this.components.bottom.set({height: bottom});
  2926. 				this.components.left.set({width: left});
  2927. 			};
  2928. 			
  2929. 			this.onInactive = () => {
  2930. 				addListeners(this, false);
  2931. 				
  2932. 				if (crop.left === left && crop.top === top && crop.right === right && crop.bottom === bottom) {
  2933. 					return;
  2934. 				}
  2935. 				
  2936. 				crop.left = left;
  2937. 				crop.top = top;
  2938. 				crop.right = right;
  2939. 				crop.bottom = bottom;
  2940. 				
  2941. 				crop.apply();
  2942. 			};
  2943. 			
  2944. 			this.onActive = () => {
  2945. 				const config = $config.get().crop;
  2946. 				
  2947. 				handle = config.handle / Math.max(zoom.value, 1);
  2948. 				
  2949. 				for (const component of [this.components.top, this.components.bottom, this.components.left, this.components.right]) {
  2950. 					if (component.isHandle) {
  2951. 						component.setHandle();
  2952. 					}
  2953. 				}
  2954. 				
  2955. 				crop.reveal();
  2956. 				
  2957. 				addListeners(this);
  2958. 				
  2959. 				if (!enabler.isHidingGlow) {
  2960. 					glow.handleViewChange();
  2961. 					
  2962. 					glow.reset();
  2963. 				}
  2964. 			};
  2965. 			
  2966. 			const draggingSelector = css.getSelector(enabler.CLASS_DRAGGING);
  2967. 			
  2968. 			this.updateConfig = (() => {
  2969. 				const rule = new css.Toggleable();
  2970. 				
  2971. 				return () => {
  2972. 					// set handle size
  2973. 					for (const button of [this.components.left, this.components.top, this.components.right, this.components.bottom]) {
  2974. 						if (button.isHandle) {
  2975. 							button.setHandle();
  2976. 						}
  2977. 					}
  2978. 					
  2979. 					rule.remove();
  2980. 					
  2981. 					const {colour} = $config.get().crop;
  2982. 					const {id} = container;
  2983. 					
  2984. 					rule.add(`#${id}>:hover.${Button.CLASS_HANDLE},#${id}>:not(.${Button.CLASS_HANDLE})`, ['background-color', colour.fill]);
  2985. 					rule.add(`#${id}>*`, ['border-color', colour.border]);
  2986. 					rule.add(`#${id}:not(${draggingSelector} *)>:not(:hover)`, ['filter', `drop-shadow(${colour.shadow} 0 0 1px)`]);
  2987. 				};
  2988. 			})();
  2989. 			
  2990. 			$config.ready.then(() => {
  2991. 				this.updateConfig();
  2992. 			});
  2993. 			
  2994. 			container.id = 'viewfind-crop-container';
  2995. 			
  2996. 			(() => {
  2997. 				const {id} = container;
  2998. 				
  2999. 				css.add(`${css.getSelector(enabler.CLASS_DRAGGING)} #${id}`, ['cursor', 'grabbing']);
  3000. 				css.add(`${css.getSelector(enabler.CLASS_ABLE)} #${id}`, ['cursor', 'grab']);
  3001. 				css.add(`#${id}>:not(${draggingSelector} .${Button.CLASS_HANDLE})`, ['border-style', 'solid']);
  3002. 				css.add(`${draggingSelector} #${id}>.${Button.CLASS_HANDLE}`, ['filter', 'none']);
  3003. 				
  3004. 				for (const [side, sideClass] of Object.entries(Button.CLASS_EDGES)) {
  3005. 					css.add(
  3006. 						`${draggingSelector} #${id}>.${sideClass}.${Button.CLASS_HANDLE}~.${sideClass}.${CornerButton.CLASS_NAME}`,
  3007. 						[`border-${CornerButton.OPPOSITES[side]}-style`, 'none'],
  3008. 						['filter', 'none'],
  3009. 					);
  3010. 					
  3011. 					// in fullscreen, 16:9 videos get an offsetLeft of 1px on my 16:9 monitor
  3012. 					// I'm extending buttons by 1px so that they reach the edge of screens like mine at default zoom
  3013. 					css.add(`#${id}>.${sideClass}`, [`margin-${side}`, '-1px'], [`padding-${side}`, '1px']);
  3014. 				}
  3015. 				
  3016. 				css.add(`#${id}:not(.${this.CLASS_ABLE} *)`, ['display', 'none']);
  3017. 			})();
  3018. 		}(),
  3019. 		
  3020. 		pan: new function () {
  3021. 			this.CODE = 'pan';
  3022. 			
  3023. 			this.CLASS_ABLE = 'viewfind-action-able-pan';
  3024. 			
  3025. 			this.onActive = () => {
  3026. 				this.updateCrosshair();
  3027. 				
  3028. 				addListeners(this);
  3029. 			};
  3030. 			
  3031. 			this.onInactive = () => {
  3032. 				addListeners(this, false);
  3033. 			};
  3034. 			
  3035. 			this.updateCrosshair = (() => {
  3036. 				const getRoundedString = (number, decimal = 2) => {
  3037. 					const raised = `${Math.round(number * Math.pow(10, decimal))}`.padStart(decimal + 1, '0');
  3038. 					
  3039. 					return `${raised.substr(0, raised.length - decimal)}.${raised.substr(raised.length - decimal)}`;
  3040. 				};
  3041. 				
  3042. 				const getSigned = (ratio) => {
  3043. 					const percent = Math.round(ratio * 100);
  3044. 					
  3045. 					if (percent <= 0) {
  3046. 						return `${percent}`;
  3047. 					}
  3048. 					
  3049. 					return `+${percent}`;
  3050. 				};
  3051. 				
  3052. 				return () => {
  3053. 					crosshair.text.innerText = `${getRoundedString(zoom.value)}×\n${getSigned(position.x)}%\n${getSigned(position.y)}%`;
  3054. 				};
  3055. 			})();
  3056. 			
  3057. 			this.onScroll = getOnScroll((distance) => {
  3058. 				const increment = distance * $config.get().speeds.zoom;
  3059. 				
  3060. 				if (increment > 0) {
  3061. 					zoom.value *= 1 + increment;
  3062. 				} else {
  3063. 					zoom.value /= 1 - increment;
  3064. 				}
  3065. 				
  3066. 				zoom.constrain();
  3067. 				
  3068. 				position.constrain();
  3069. 				
  3070. 				this.updateCrosshair();
  3071. 			});
  3072. 			
  3073. 			this.onRightClick = (event) => {
  3074. 				event.stopImmediatePropagation();
  3075. 				event.preventDefault();
  3076. 				
  3077. 				if (stopDrag) {
  3078. 					return;
  3079. 				}
  3080. 				
  3081. 				position.x = position.y = 0;
  3082. 				zoom.value = 1;
  3083. 				
  3084. 				position.apply();
  3085. 				
  3086. 				zoom.constrain();
  3087. 				
  3088. 				this.updateCrosshair();
  3089. 			};
  3090. 			
  3091. 			this.onMouseDown = (() => {
  3092. 				const getDragListener = () => {
  3093. 					const {multipliers} = $config.get();
  3094. 					
  3095. 					let priorEvent;
  3096. 					
  3097. 					const change = {x: 0, y: 0};
  3098. 					
  3099. 					return ({offsetX, offsetY}) => {
  3100. 						if (priorEvent) {
  3101. 							change.x = (priorEvent.offsetX + change.x - offsetX) * multipliers.pan;
  3102. 							change.y = (priorEvent.offsetY - change.y - offsetY) * -multipliers.pan;
  3103. 							
  3104. 							position.x += change.x / video.clientWidth;
  3105. 							position.y += change.y / video.clientHeight;
  3106. 							
  3107. 							position.constrain();
  3108. 							
  3109. 							this.updateCrosshair();
  3110. 						}
  3111. 						
  3112. 						// events in firefox seem to lose their data after finishing propagation
  3113. 						// so assigning the whole event doesn't work
  3114. 						priorEvent = {offsetX, offsetY};
  3115. 					};
  3116. 				};
  3117. 				
  3118. 				const clickListener = (event) => {
  3119. 					position.x = event.offsetX / video.clientWidth - 0.5;
  3120. 					// Y increases moving down the page
  3121. 					// I flip that to make trigonometry easier
  3122. 					position.y = -event.offsetY / video.clientHeight + 0.5;
  3123. 					
  3124. 					position.constrain(true);
  3125. 					
  3126. 					this.updateCrosshair();
  3127. 				};
  3128. 				
  3129. 				return (event) => {
  3130. 					if (event.buttons === 1) {
  3131. 						drag(event, clickListener, getDragListener());
  3132. 					}
  3133. 				};
  3134. 			})();
  3135. 		}(),
  3136. 		
  3137. 		rotate: new function () {
  3138. 			this.CODE = 'rotate';
  3139. 			
  3140. 			this.CLASS_ABLE = 'viewfind-action-able-rotate';
  3141. 			
  3142. 			this.onActive = () => {
  3143. 				this.updateCrosshair();
  3144. 				
  3145. 				addListeners(this);
  3146. 			};
  3147. 			
  3148. 			this.onInactive = () => {
  3149. 				addListeners(this, false);
  3150. 			};
  3151. 			
  3152. 			this.updateCrosshair = () => {
  3153. 				const angle = DEGREES[90] - rotation.value;
  3154. 				
  3155. 				crosshair.text.innerText = `${Math.floor((DEGREES[90] - rotation.value) / Math.PI * 180)}°\n≈${Math.round(angle / DEGREES[90]) % 4 * 90}°`;
  3156. 			};
  3157. 			
  3158. 			this.onScroll = getOnScroll((distance) => {
  3159. 				rotation.value += distance * $config.get().speeds.rotate;
  3160. 				
  3161. 				rotation.constrain();
  3162. 				
  3163. 				zoom.constrain();
  3164. 				position.constrain();
  3165. 				
  3166. 				this.updateCrosshair();
  3167. 			});
  3168. 			
  3169. 			this.onRightClick = (event) => {
  3170. 				event.stopImmediatePropagation();
  3171. 				event.preventDefault();
  3172. 				
  3173. 				if (stopDrag) {
  3174. 					return;
  3175. 				}
  3176. 				
  3177. 				rotation.value = DEGREES[90];
  3178. 				
  3179. 				rotation.apply();
  3180. 				
  3181. 				zoom.constrain();
  3182. 				position.constrain();
  3183. 				
  3184. 				this.updateCrosshair();
  3185. 			};
  3186. 			
  3187. 			this.onMouseDown = (() => {
  3188. 				const getDragListener = () => {
  3189. 					const {multipliers} = $config.get();
  3190. 					const middleX = containers.tracker.clientWidth / 2;
  3191. 					const middleY = containers.tracker.clientHeight / 2;
  3192. 					
  3193. 					const priorPosition = position.getValues();
  3194. 					const priorZoom = zoom.value;
  3195. 					
  3196. 					let priorMouseTheta;
  3197. 					
  3198. 					return (event) => {
  3199. 						const mouseTheta = getTheta(middleX, middleY, event.offsetX, event.offsetY);
  3200. 						
  3201. 						if (priorMouseTheta === undefined) {
  3202. 							priorMouseTheta = mouseTheta;
  3203. 							
  3204. 							return;
  3205. 						}
  3206. 						
  3207. 						position.x = priorPosition.x;
  3208. 						position.y = priorPosition.y;
  3209. 						zoom.value = priorZoom;
  3210. 						
  3211. 						rotation.value += (priorMouseTheta - mouseTheta) * multipliers.rotate;
  3212. 						
  3213. 						rotation.constrain();
  3214. 						
  3215. 						zoom.constrain();
  3216. 						position.constrain();
  3217. 						
  3218. 						this.updateCrosshair();
  3219. 						
  3220. 						priorMouseTheta = mouseTheta;
  3221. 					};
  3222. 				};
  3223. 				
  3224. 				const clickListener = () => {
  3225. 					rotation.value = Math.round(rotation.value / DEGREES[90]) * DEGREES[90];
  3226. 					
  3227. 					rotation.constrain();
  3228. 					
  3229. 					zoom.constrain();
  3230. 					position.constrain();
  3231. 					
  3232. 					this.updateCrosshair();
  3233. 				};
  3234. 				
  3235. 				return (event) => {
  3236. 					if (event.buttons === 1) {
  3237. 						drag(event, clickListener, getDragListener(), containers.tracker);
  3238. 					}
  3239. 				};
  3240. 			})();
  3241. 		}(),
  3242. 		
  3243. 		configure: new function () {
  3244. 			this.CODE = 'config';
  3245. 			
  3246. 			this.onActive = async () => {
  3247. 				await $config.edit();
  3248. 				
  3249. 				updateConfigs();
  3250. 				
  3251. 				viewport.focus();
  3252. 				
  3253. 				glow.reset();
  3254. 				
  3255. 				position.constrain();
  3256. 				zoom.constrain();
  3257. 			};
  3258. 		}(),
  3259. 		
  3260. 		reset: new function () {
  3261. 			this.CODE = 'reset';
  3262. 			
  3263. 			this.onActive = () => {
  3264. 				if (this.restore) {
  3265. 					this.restore();
  3266. 				} else {
  3267. 					this.restore = peek();
  3268. 				}
  3269. 			};
  3270. 		}(),
  3271. 	};
  3272. })();
  3273.  
  3274. const crosshair = new function () {
  3275. 	this.container = document.createElement('div');
  3276. 	
  3277. 	this.lines = {
  3278. 		horizontal: document.createElement('div'),
  3279. 		vertical: document.createElement('div'),
  3280. 	};
  3281. 	
  3282. 	this.text = document.createElement('div');
  3283. 	
  3284. 	const id = 'viewfind-crosshair';
  3285. 	
  3286. 	this.container.id = id;
  3287. 	this.container.classList.add(CLASS_VIEWFINDER);
  3288. 	
  3289. 	css.add(`#${id}:not(${css.getSelector(actions.pan.CLASS_ABLE)} *):not(${css.getSelector(actions.rotate.CLASS_ABLE)} *)`, ['display', 'none']);
  3290. 	
  3291. 	this.lines.horizontal.style.position = this.lines.vertical.style.position = this.text.style.position = this.container.style.position = 'absolute';
  3292. 	
  3293. 	this.lines.horizontal.style.top = '50%';
  3294. 	this.lines.horizontal.style.width = '100%';
  3295. 	
  3296. 	this.lines.vertical.style.left = '50%';
  3297. 	this.lines.vertical.style.height = '100%';
  3298. 	
  3299. 	this.text.style.userSelect = 'none';
  3300. 	
  3301. 	this.container.style.top = '0';
  3302. 	this.container.style.width = '100%';
  3303. 	this.container.style.height = '100%';
  3304. 	this.container.style.pointerEvents = 'none';
  3305. 	
  3306. 	this.container.append(this.lines.horizontal, this.lines.vertical);
  3307. 	
  3308. 	this.clip = () => {
  3309. 		const {outer, inner, gap} = $config.get().crosshair;
  3310. 		
  3311. 		const thickness = Math.max(inner, outer);
  3312. 		
  3313. 		const halfWidth = viewport.clientWidth / 2;
  3314. 		const halfHeight = viewport.clientHeight / 2;
  3315. 		const halfGap = gap / 2;
  3316. 		
  3317. 		const startInner = (thickness - inner) / 2;
  3318. 		const startOuter = (thickness - outer) / 2;
  3319. 		
  3320. 		const endInner = thickness - startInner;
  3321. 		const endOuter = thickness - startOuter;
  3322. 		
  3323. 		this.lines.horizontal.style.clipPath = 'path(\''
  3324. 			+ `M0 ${startOuter}L${halfWidth - halfGap} ${startOuter}L${halfWidth - halfGap} ${startInner}L${halfWidth + halfGap} ${startInner}L${halfWidth + halfGap} ${startOuter}L${viewport.clientWidth} ${startOuter}`
  3325. 			+ `L${viewport.clientWidth} ${endOuter}L${halfWidth + halfGap} ${endOuter}L${halfWidth + halfGap} ${endInner}L${halfWidth - halfGap} ${endInner}L${halfWidth - halfGap} ${endOuter}L0 ${endOuter}`
  3326. 			+ 'Z\')';
  3327. 		
  3328. 		this.lines.vertical.style.clipPath = 'path(\''
  3329. 			+ `M${startOuter} 0L${startOuter} ${halfHeight - halfGap}L${startInner} ${halfHeight - halfGap}L${startInner} ${halfHeight + halfGap}L${startOuter} ${halfHeight + halfGap}L${startOuter} ${viewport.clientHeight}`
  3330. 			+ `L${endOuter} ${viewport.clientHeight}L${endOuter} ${halfHeight + halfGap}L${endInner} ${halfHeight + halfGap}L${endInner} ${halfHeight - halfGap}L${endOuter} ${halfHeight - halfGap}L${endOuter} 0`
  3331. 			+ 'Z\')';
  3332. 	};
  3333. 	
  3334. 	this.updateConfig = (doClip = true) => {
  3335. 		const {colour, outer, inner, text} = $config.get().crosshair;
  3336. 		const thickness = Math.max(inner, outer);
  3337. 		
  3338. 		this.container.style.filter = `drop-shadow(${colour.shadow} 0 0 1px)`;
  3339. 		
  3340. 		this.lines.horizontal.style.translate = `0 -${thickness / 2}px`;
  3341. 		this.lines.vertical.style.translate = `-${thickness / 2}px 0`;
  3342. 		
  3343. 		this.lines.horizontal.style.height = this.lines.vertical.style.width = `${thickness}px`;
  3344. 		
  3345. 		this.lines.horizontal.style.backgroundColor = this.lines.vertical.style.backgroundColor = colour.fill;
  3346. 		
  3347. 		if (text) {
  3348. 			this.text.style.color = colour.fill;
  3349. 			
  3350. 			this.text.style.font = text.font;
  3351. 			this.text.style.left = `${text.position.x}%`;
  3352. 			this.text.style.top = `${text.position.y}%`;
  3353. 			this.text.style.transform = `translate(${text.translate.x}%,${text.translate.y}%) translate(${text.offset.x}px,${text.offset.y}px)`;
  3354. 			this.text.style.textAlign = text.align;
  3355. 			this.text.style.lineHeight = text.height;
  3356. 			
  3357. 			this.container.append(this.text);
  3358. 		} else {
  3359. 			this.text.remove();
  3360. 		}
  3361. 		
  3362. 		if (doClip) {
  3363. 			this.clip();
  3364. 		}
  3365. 	};
  3366. 	
  3367. 	$config.ready.then(() => {
  3368. 		this.updateConfig(false);
  3369. 	});
  3370. }();
  3371.  
  3372. // ELEMENT CHANGE LISTENERS
  3373.  
  3374. const observer = new function () {
  3375. 	const onResolutionChange = () => {
  3376. 		glow.handleSizeChange?.();
  3377. 	};
  3378. 	
  3379. 	const styleObserver = new MutationObserver((() => {
  3380. 		const properties = ['top', 'left', 'width', 'height', 'scale', 'rotate', 'translate', 'transform-origin'];
  3381. 		
  3382. 		let priorStyle;
  3383. 		
  3384. 		return () => {
  3385. 			// mousemove events on video with ctrlKey=true trigger this but have no effect
  3386. 			if (video.style.cssText === priorStyle) {
  3387. 				return;
  3388. 			}
  3389. 			
  3390. 			priorStyle = video.style.cssText;
  3391. 			
  3392. 			for (const property of properties) {
  3393. 				containers.background.style[property] = video.style[property];
  3394. 				containers.foreground.style[property] = video.style[property];
  3395. 				
  3396. 				// cinematics doesn't exist for embedded vids
  3397. 				if (cinematics) {
  3398. 					cinematics.style[property] = video.style[property];
  3399. 				}
  3400. 			}
  3401. 			
  3402. 			glow.handleViewChange();
  3403. 		};
  3404. 	})());
  3405. 	
  3406. 	const videoObserver = new ResizeObserver(() => {
  3407. 		handleViewportChange();
  3408. 		
  3409. 		glow.handleSizeChange?.();
  3410. 	});
  3411. 	
  3412. 	const viewportObserver = new ResizeObserver(() => {
  3413. 		handleViewportChange();
  3414. 		
  3415. 		crosshair.clip();
  3416. 	});
  3417. 	
  3418. 	this.start = () => {
  3419. 		video.addEventListener('resize', onResolutionChange);
  3420. 		
  3421. 		styleObserver.observe(video, {attributes: true, attributeFilter: ['style']});
  3422. 		viewportObserver.observe(viewport);
  3423. 		videoObserver.observe(video);
  3424. 		
  3425. 		glow.handleViewChange();
  3426. 	};
  3427. 	
  3428. 	this.stop = () => {
  3429. 		video.removeEventListener('resize', onResolutionChange);
  3430. 		
  3431. 		styleObserver.disconnect();
  3432. 		viewportObserver.disconnect();
  3433. 		videoObserver.disconnect();
  3434. 	};
  3435. }();
  3436.  
  3437. // NAVIGATION LISTENERS
  3438.  
  3439. const stop = () => {
  3440. 	if (stopped) {
  3441. 		return;
  3442. 	}
  3443. 	
  3444. 	stopped = true;
  3445. 	
  3446. 	enabler.stop();
  3447. 	
  3448. 	stopDrag?.();
  3449. 	
  3450. 	observer.stop();
  3451. 	
  3452. 	containers.background.remove();
  3453. 	containers.foreground.remove();
  3454. 	containers.tracker.remove();
  3455. 	crosshair.container.remove();
  3456. 	
  3457. 	return peek(true);
  3458. };
  3459.  
  3460. const start = () => {
  3461. 	if (!stopped || viewport.classList.contains('ad-showing')) {
  3462. 		return;
  3463. 	}
  3464. 	
  3465. 	stopped = false;
  3466. 	
  3467. 	observer.start();
  3468. 	
  3469. 	glow.start();
  3470. 	
  3471. 	viewport.append(containers.background, containers.foreground, containers.tracker, crosshair.container);
  3472. 	
  3473. 	// User may have a static minimum zoom greater than 1
  3474. 	zoom.constrain();
  3475. 	
  3476. 	enabler.handleChange();
  3477. };
  3478.  
  3479. const updateConfigs = () => {
  3480. 	ConfigCache.id++;
  3481. 	
  3482. 	enabler.updateConfig();
  3483. 	actions.crop.updateConfig();
  3484. 	crosshair.updateConfig();
  3485. };
  3486.  
  3487. // LISTENER ASSIGNMENTS
  3488.  
  3489. // load & navigation
  3490. (() => {
  3491. 	const getNode = (node, selector, ...selectors) => new Promise((resolve) => {
  3492. 		for (const child of node.children) {
  3493. 			if (child.matches(selector)) {
  3494. 				resolve(selectors.length === 0 ? child : getNode(child, ...selectors));
  3495. 				
  3496. 				return;
  3497. 			}
  3498. 		}
  3499. 		
  3500. 		new MutationObserver((changes, observer) => {
  3501. 			for (const {addedNodes} of changes) {
  3502. 				for (const child of addedNodes) {
  3503. 					if (child.matches(selector)) {
  3504. 						resolve(selectors.length === 0 ? child : getNode(child, ...selectors));
  3505. 						
  3506. 						observer.disconnect();
  3507. 						
  3508. 						return;
  3509. 					}
  3510. 				}
  3511. 			}
  3512. 		}).observe(node, {childList: true});
  3513. 	});
  3514. 	
  3515. 	const init = async () => {
  3516. 		if (unsafeWindow.ytplayer?.bootstrapPlayerContainer?.childElementCount > 0) {
  3517. 			// wait for the video to be moved to ytd-app
  3518. 			await new Promise((resolve) => {
  3519. 				new MutationObserver((changes, observer) => {
  3520. 					resolve();
  3521. 					
  3522. 					observer.disconnect();
  3523. 				}).observe(unsafeWindow.ytplayer.bootstrapPlayerContainer, {childList: true});
  3524. 			});
  3525. 		}
  3526. 		
  3527. 		try {
  3528. 			await $config.ready;
  3529. 		} catch (error) {
  3530. 			if (!$config.reset || !window.confirm(`${error.message}\n\nWould you like to erase your data?`)) {
  3531. 				console.error(error);
  3532. 				
  3533. 				return;
  3534. 			}
  3535. 			
  3536. 			await $config.reset();
  3537. 			
  3538. 			updateConfigs();
  3539. 		}
  3540. 		
  3541. 		if (isEmbed) {
  3542. 			video = document.body.querySelector(SELECTOR_VIDEO);
  3543. 		} else {
  3544. 			const pageManager = await getNode(document.body, 'ytd-app', '#content', 'ytd-page-manager');
  3545. 			
  3546. 			const page = pageManager.getCurrentPage() ?? await new Promise((resolve) => {
  3547. 				new MutationObserver(([{addedNodes: [page]}], observer) => {
  3548. 					if (page) {
  3549. 						resolve(page);
  3550. 						
  3551. 						observer.disconnect();
  3552. 					}
  3553. 				}).observe(pageManager, {childList: true});
  3554. 			});
  3555. 			
  3556. 			await page.playerEl.getPlayerPromise();
  3557. 			
  3558. 			video = page.playerEl.querySelector(SELECTOR_VIDEO);
  3559. 			cinematics = page.querySelector('#cinematics');
  3560. 			
  3561. 			// navigation to a new video
  3562. 			new MutationObserver(() => {
  3563. 				video.removeEventListener('play', startIfReady);
  3564. 				
  3565. 				power.off();
  3566. 				
  3567. 				// this callback can occur after metadata loads
  3568. 				startIfReady();
  3569. 			}).observe(page, {attributes: true, attributeFilter: ['video-id']});
  3570. 			
  3571. 			// navigation to a non-video page
  3572. 			new MutationObserver(() => {
  3573. 				if (video.src === '') {
  3574. 					video.removeEventListener('play', startIfReady);
  3575. 					
  3576. 					power.off();
  3577. 				}
  3578. 			}).observe(video, {attributes: true, attributeFilter: ['src']});
  3579. 		}
  3580. 		
  3581. 		viewport = video.parentElement.parentElement;
  3582. 		altTarget = viewport.parentElement;
  3583. 		
  3584. 		containers.foreground.style.zIndex = crosshair.container.style.zIndex = video.parentElement.computedStyleMap?.().get('z-index').value ?? 10;
  3585. 		crosshair.clip();
  3586. 		
  3587. 		videoAngle = getTheta(0, 0, video.clientWidth, video.clientHeight);
  3588. 		handleViewportChange();
  3589. 		
  3590. 		const startIfReady = () => {
  3591. 			if (video.readyState >= HTMLMediaElement.HAVE_METADATA) {
  3592. 				start();
  3593. 			}
  3594. 		};
  3595. 		
  3596. 		const power = new function () {
  3597. 			this.off = () => {
  3598. 				delete this.wake;
  3599. 				
  3600. 				stop();
  3601. 			};
  3602. 			
  3603. 			this.sleep = () => {
  3604. 				this.wake ??= stop();
  3605. 			};
  3606. 		}();
  3607. 		
  3608. 		new MutationObserver((() => {
  3609. 			return () => {
  3610. 				// video end
  3611. 				if (viewport.classList.contains('ended-mode')) {
  3612. 					power.off();
  3613. 					
  3614. 					video.addEventListener('play', startIfReady, {once: true});
  3615. 				// ad start
  3616. 				} else if (viewport.classList.contains('ad-showing')) {
  3617. 					power.sleep();
  3618. 				}
  3619. 			};
  3620. 		})()).observe(viewport, {attributes: true, attributeFilter: ['class']});
  3621. 		
  3622. 		// glow initialisation requires video dimensions
  3623. 		startIfReady();
  3624. 		
  3625. 		video.addEventListener('loadedmetadata', () => {
  3626. 			if (viewport.classList.contains('ad-showing')) {
  3627. 				return;
  3628. 			}
  3629. 			
  3630. 			start();
  3631. 			
  3632. 			if (power.wake) {
  3633. 				power.wake();
  3634. 				
  3635. 				delete power.wake;
  3636. 			}
  3637. 		});
  3638. 	};
  3639. 	
  3640. 	if (!('ytPageType' in unsafeWindow) || unsafeWindow.ytPageType === 'watch') {
  3641. 		init();
  3642. 		
  3643. 		return;
  3644. 	}
  3645. 	
  3646. 	const initListener = ({detail: {newPageType}}) => {
  3647. 		if (newPageType === 'ytd-watch-flexy') {
  3648. 			init();
  3649. 			
  3650. 			document.body.removeEventListener('yt-page-type-changed', initListener);
  3651. 		}
  3652. 	};
  3653. 	
  3654. 	document.body.addEventListener('yt-page-type-changed', initListener);
  3655. })();
  3656.  
  3657. // keyboard state change
  3658.  
  3659. document.addEventListener('keydown', ({code}) => {
  3660. 	if (enabler.toggled) {
  3661. 		enabler.keys[enabler.keys.has(code) ? 'delete' : 'add'](code);
  3662. 		
  3663. 		enabler.handleChange();
  3664. 	} else if (!enabler.keys.has(code)) {
  3665. 		enabler.keys.add(code);
  3666. 		
  3667. 		enabler.handleChange();
  3668. 	}
  3669. });
  3670.  
  3671. document.addEventListener('keyup', ({code}) => {
  3672. 	if (enabler.toggled) {
  3673. 		return;
  3674. 	}
  3675. 	
  3676. 	if (enabler.keys.has(code)) {
  3677. 		enabler.keys.delete(code);
  3678. 		
  3679. 		enabler.handleChange();
  3680. 	}
  3681. });
  3682.  
  3683. window.addEventListener('blur', () => {
  3684. 	if (enabler.toggled) {
  3685. 		stopDrag?.();
  3686. 	} else {
  3687. 		enabler.keys.clear();
  3688. 		
  3689. 		enabler.handleChange();
  3690. 	}
  3691. });
  3692. })();