view.js 18 KB

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  1. /* globals document */
  2. import View from '../../../src/view/view';
  3. import Observer from '../../../src/view/observer/observer';
  4. import MutationObserver from '../../../src/view/observer/mutationobserver';
  5. import KeyObserver from '../../../src/view/observer/keyobserver';
  6. import FakeSelectionObserver from '../../../src/view/observer/fakeselectionobserver';
  7. import SelectionObserver from '../../../src/view/observer/selectionobserver';
  8. import FocusObserver from '../../../src/view/observer/focusobserver';
  9. import CompositionObserver from '../../../src/view/observer/compositionobserver';
  10. import ViewRange from '../../../src/view/range';
  11. import ViewElement from '../../../src/view/element';
  12. import ViewPosition from '../../../src/view/position';
  13. import { isBlockFiller, BR_FILLER } from '../../../src/view/filler';
  14. import CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';
  15. import log from '@ckeditor/ckeditor5-utils/src/log';
  16. import count from '@ckeditor/ckeditor5-utils/src/count';
  17. import global from '@ckeditor/ckeditor5-utils/src/dom/global';
  18. import createViewRoot from '../_utils/createroot';
  19. import createElement from '@ckeditor/ckeditor5-utils/src/dom/createelement';
  20. import testUtils from '@ckeditor/ckeditor5-core/tests/_utils/utils';
  21. describe( 'view', () => {
  22. const DEFAULT_OBSERVERS_COUNT = 6;
  23. let domRoot, view, viewDocument, ObserverMock, instantiated, enabled, ObserverMockGlobalCount;
  24. testUtils.createSinonSandbox();
  25. beforeEach( () => {
  26. domRoot = createElement( document, 'div', {
  27. id: 'editor',
  28. contenteditable: 'true'
  29. } );
  30. document.body.appendChild( domRoot );
  31. view = new View();
  32. viewDocument = view.document;
  33. ObserverMock = class extends Observer {
  34. constructor( view ) {
  35. super( view );
  36. this.enable = sinon.spy();
  37. this.disable = sinon.spy();
  38. this.observe = sinon.spy();
  39. this.destroy = sinon.spy();
  40. }
  41. };
  42. instantiated = 0;
  43. enabled = 0;
  44. ObserverMockGlobalCount = class extends Observer {
  45. constructor( view ) {
  46. super( view );
  47. instantiated++;
  48. this.observe = sinon.spy();
  49. }
  50. enable() {
  51. enabled++;
  52. }
  53. };
  54. } );
  55. afterEach( () => {
  56. domRoot.remove();
  57. view.destroy();
  58. } );
  59. it( 'should add default observers', () => {
  60. expect( count( view._observers ) ).to.equal( DEFAULT_OBSERVERS_COUNT );
  61. expect( view.getObserver( MutationObserver ) ).to.be.instanceof( MutationObserver );
  62. expect( view.getObserver( SelectionObserver ) ).to.be.instanceof( SelectionObserver );
  63. expect( view.getObserver( FocusObserver ) ).to.be.instanceof( FocusObserver );
  64. expect( view.getObserver( KeyObserver ) ).to.be.instanceof( KeyObserver );
  65. expect( view.getObserver( FakeSelectionObserver ) ).to.be.instanceof( FakeSelectionObserver );
  66. expect( view.getObserver( CompositionObserver ) ).to.be.instanceof( CompositionObserver );
  67. } );
  68. describe( 'attachDomRoot()', () => {
  69. it( 'should attach DOM element to main view element', () => {
  70. const domDiv = document.createElement( 'div' );
  71. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  72. expect( count( view.domRoots ) ).to.equal( 0 );
  73. view.attachDomRoot( domDiv );
  74. expect( count( view.domRoots ) ).to.equal( 1 );
  75. expect( view.getDomRoot() ).to.equal( domDiv );
  76. expect( view.domConverter.mapViewToDom( viewRoot ) ).to.equal( domDiv );
  77. expect( view._renderer.markedChildren.has( viewRoot ) ).to.be.true;
  78. domDiv.remove();
  79. } );
  80. it( 'should attach DOM element to custom view element', () => {
  81. const domH1 = document.createElement( 'h1' );
  82. const viewH1 = createViewRoot( viewDocument, 'h1', 'header' );
  83. expect( count( view.domRoots ) ).to.equal( 0 );
  84. view.attachDomRoot( domH1, 'header' );
  85. expect( count( view.domRoots ) ).to.equal( 1 );
  86. expect( view.getDomRoot( 'header' ) ).to.equal( domH1 );
  87. expect( view.domConverter.mapViewToDom( viewH1 ) ).to.equal( domH1 );
  88. expect( view._renderer.markedChildren.has( viewH1 ) ).to.be.true;
  89. } );
  90. it( 'should call observe on each observer', () => {
  91. // The variable will be overwritten.
  92. view.destroy();
  93. view = new View();
  94. viewDocument = view.document;
  95. view._renderer.render = sinon.spy();
  96. const domDiv1 = document.createElement( 'div' );
  97. domDiv1.setAttribute( 'id', 'editor' );
  98. const domDiv2 = document.createElement( 'div' );
  99. domDiv2.setAttribute( 'id', 'editor' );
  100. const observerMock = view.addObserver( ObserverMock );
  101. const observerMockGlobalCount = view.addObserver( ObserverMockGlobalCount );
  102. createViewRoot( viewDocument, 'div', 'root1' );
  103. view.attachDomRoot( document.createElement( 'div' ), 'root1' );
  104. sinon.assert.calledOnce( observerMock.observe );
  105. sinon.assert.calledOnce( observerMockGlobalCount.observe );
  106. } );
  107. } );
  108. describe( 'addObserver()', () => {
  109. beforeEach( () => {
  110. // The variable will be overwritten.
  111. view.destroy();
  112. view = new View();
  113. viewDocument = view.document;
  114. view._renderer.render = sinon.spy();
  115. } );
  116. afterEach( () => {
  117. view.destroy();
  118. } );
  119. it( 'should be instantiated and enabled on adding', () => {
  120. const observerMock = view.addObserver( ObserverMock );
  121. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 1 );
  122. expect( observerMock ).to.have.property( 'document', viewDocument );
  123. sinon.assert.calledOnce( observerMock.enable );
  124. } );
  125. it( 'should return observer instance each time addObserver is called', () => {
  126. const observerMock1 = view.addObserver( ObserverMock );
  127. const observerMock2 = view.addObserver( ObserverMock );
  128. expect( observerMock1 ).to.be.instanceof( ObserverMock );
  129. expect( observerMock2 ).to.be.instanceof( ObserverMock );
  130. expect( observerMock1 ).to.equals( observerMock2 );
  131. } );
  132. it( 'should instantiate one observer only once', () => {
  133. view.addObserver( ObserverMockGlobalCount );
  134. view.addObserver( ObserverMockGlobalCount );
  135. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 1 );
  136. expect( instantiated ).to.equal( 1 );
  137. expect( enabled ).to.equal( 1 );
  138. view.addObserver( ObserverMock );
  139. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 2 );
  140. } );
  141. it( 'should instantiate child class of already registered observer', () => {
  142. class ObserverMock extends Observer {
  143. enable() {}
  144. }
  145. class ChildObserverMock extends ObserverMock {
  146. enable() {}
  147. }
  148. view.addObserver( ObserverMock );
  149. view.addObserver( ChildObserverMock );
  150. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 2 );
  151. } );
  152. it( 'should be disabled and re-enabled on render', () => {
  153. const observerMock = view.addObserver( ObserverMock );
  154. view.render();
  155. sinon.assert.calledOnce( observerMock.disable );
  156. sinon.assert.calledOnce( view._renderer.render );
  157. sinon.assert.calledTwice( observerMock.enable );
  158. } );
  159. it( 'should call observe on each root', () => {
  160. createViewRoot( viewDocument, 'div', 'roo1' );
  161. createViewRoot( viewDocument, 'div', 'roo2' );
  162. view.attachDomRoot( document.createElement( 'div' ), 'roo1' );
  163. view.attachDomRoot( document.createElement( 'div' ), 'roo2' );
  164. const observerMock = view.addObserver( ObserverMock );
  165. sinon.assert.calledTwice( observerMock.observe );
  166. } );
  167. } );
  168. describe( 'getObserver()', () => {
  169. it( 'should return observer it it is added', () => {
  170. const addedObserverMock = view.addObserver( ObserverMock );
  171. const getObserverMock = view.getObserver( ObserverMock );
  172. expect( getObserverMock ).to.be.instanceof( ObserverMock );
  173. expect( getObserverMock ).to.equal( addedObserverMock );
  174. } );
  175. it( 'should return undefined if observer is not added', () => {
  176. const getObserverMock = view.getObserver( ObserverMock );
  177. expect( getObserverMock ).to.be.undefined;
  178. } );
  179. } );
  180. describe( 'scrollToTheSelection()', () => {
  181. beforeEach( () => {
  182. // Silence the Rect warnings.
  183. testUtils.sinon.stub( log, 'warn' );
  184. } );
  185. it( 'does nothing when there are no ranges in the selection', () => {
  186. const stub = testUtils.sinon.stub( global.window, 'scrollTo' );
  187. view.scrollToTheSelection();
  188. sinon.assert.notCalled( stub );
  189. } );
  190. it( 'scrolls to the first range in selection with an offset', () => {
  191. const root = createViewRoot( viewDocument, 'div', 'main' );
  192. const stub = testUtils.sinon.stub( global.window, 'scrollTo' );
  193. const range = ViewRange.createIn( root );
  194. view.attachDomRoot( domRoot );
  195. // Make sure the window will have to scroll to the domRoot.
  196. Object.assign( domRoot.style, {
  197. position: 'absolute',
  198. top: '-1000px',
  199. left: '-1000px'
  200. } );
  201. view.change( writer => {
  202. writer.setSelection( range );
  203. } );
  204. view.scrollToTheSelection();
  205. sinon.assert.calledWithMatch( stub, sinon.match.number, sinon.match.number );
  206. } );
  207. } );
  208. describe( 'disableObservers()', () => {
  209. it( 'should disable observers', () => {
  210. const addedObserverMock = view.addObserver( ObserverMock );
  211. expect( addedObserverMock.enable.calledOnce ).to.be.true;
  212. expect( addedObserverMock.disable.called ).to.be.false;
  213. view.disableObservers();
  214. expect( addedObserverMock.enable.calledOnce ).to.be.true;
  215. expect( addedObserverMock.disable.calledOnce ).to.be.true;
  216. } );
  217. } );
  218. describe( 'enableObservers()', () => {
  219. it( 'should enable observers', () => {
  220. const addedObserverMock = view.addObserver( ObserverMock );
  221. view.disableObservers();
  222. expect( addedObserverMock.enable.calledOnce ).to.be.true;
  223. expect( addedObserverMock.disable.calledOnce ).to.be.true;
  224. view.enableObservers();
  225. expect( addedObserverMock.enable.calledTwice ).to.be.true;
  226. expect( addedObserverMock.disable.calledOnce ).to.be.true;
  227. } );
  228. } );
  229. describe( 'focus()', () => {
  230. let domEditable, viewEditable;
  231. beforeEach( () => {
  232. domEditable = document.createElement( 'div' );
  233. domEditable.setAttribute( 'contenteditable', 'true' );
  234. document.body.appendChild( domEditable );
  235. viewEditable = createViewRoot( viewDocument, 'div', 'main' );
  236. view.attachDomRoot( domEditable );
  237. view.change( writer => {
  238. writer.setSelection( viewEditable, 0 );
  239. } );
  240. } );
  241. afterEach( () => {
  242. document.body.removeChild( domEditable );
  243. } );
  244. it( 'should focus editable with selection', () => {
  245. const converterFocusSpy = testUtils.sinon.spy( view.domConverter, 'focus' );
  246. const renderSpy = testUtils.sinon.spy( view, 'render' );
  247. view.focus();
  248. expect( converterFocusSpy.called ).to.be.true;
  249. expect( renderSpy.calledOnce ).to.be.true;
  250. expect( document.activeElement ).to.equal( domEditable );
  251. const domSelection = document.getSelection();
  252. expect( domSelection.rangeCount ).to.equal( 1 );
  253. const domRange = domSelection.getRangeAt( 0 );
  254. expect( domRange.startContainer ).to.equal( domEditable );
  255. expect( domRange.startOffset ).to.equal( 0 );
  256. expect( domRange.collapsed ).to.be.true;
  257. } );
  258. it( 'should not focus if document is already focused', () => {
  259. const converterFocusSpy = testUtils.sinon.spy( view.domConverter, 'focus' );
  260. const renderSpy = testUtils.sinon.spy( view, 'render' );
  261. viewDocument.isFocused = true;
  262. view.focus();
  263. expect( converterFocusSpy.called ).to.be.false;
  264. expect( renderSpy.called ).to.be.false;
  265. } );
  266. it( 'should log warning when no selection', () => {
  267. const logSpy = testUtils.sinon.stub( log, 'warn' );
  268. view.change( writer => {
  269. writer.setSelection( null );
  270. } );
  271. view.focus();
  272. expect( logSpy.calledOnce ).to.be.true;
  273. expect( logSpy.args[ 0 ][ 0 ] ).to.match( /^view-focus-no-selection/ );
  274. } );
  275. } );
  276. describe( 'isFocused', () => {
  277. it( 'should change renderer.isFocused too', () => {
  278. expect( viewDocument.isFocused ).to.equal( false );
  279. expect( view._renderer.isFocused ).to.equal( false );
  280. viewDocument.isFocused = true;
  281. expect( viewDocument.isFocused ).to.equal( true );
  282. expect( view._renderer.isFocused ).to.equal( true );
  283. } );
  284. } );
  285. describe( 'render()', () => {
  286. it( 'disable observers, renders and enable observers', () => {
  287. const observerMock = view.addObserver( ObserverMock );
  288. const renderStub = sinon.stub( view._renderer, 'render' );
  289. view.render();
  290. sinon.assert.callOrder( observerMock.disable, renderStub, observerMock.enable );
  291. } );
  292. it( 'should fire view.document.layoutChanged event on render', () => {
  293. const spy = sinon.spy();
  294. view.document.on( 'layoutChanged', spy );
  295. view.render();
  296. sinon.assert.calledOnce( spy );
  297. view.render();
  298. sinon.assert.calledTwice( spy );
  299. } );
  300. } );
  301. describe( 'view and DOM integration', () => {
  302. it( 'should remove content of the DOM', () => {
  303. const domDiv = createElement( document, 'div', { id: 'editor' }, [
  304. createElement( document, 'p' ),
  305. createElement( document, 'p' )
  306. ] );
  307. const view = new View();
  308. const viewDocument = view.document;
  309. createViewRoot( viewDocument, 'div', 'main' );
  310. view.attachDomRoot( domDiv );
  311. view.render();
  312. expect( domDiv.childNodes.length ).to.equal( 1 );
  313. expect( isBlockFiller( domDiv.childNodes[ 0 ], BR_FILLER ) ).to.be.true;
  314. view.destroy();
  315. domDiv.remove();
  316. } );
  317. it( 'should render changes in the Document', () => {
  318. const domDiv = document.createElement( 'div' );
  319. const view = new View();
  320. const viewDocument = view.document;
  321. createViewRoot( viewDocument, 'div', 'main' );
  322. view.attachDomRoot( domDiv );
  323. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  324. view.render();
  325. expect( domDiv.childNodes.length ).to.equal( 1 );
  326. expect( domDiv.childNodes[ 0 ].tagName ).to.equal( 'P' );
  327. view.destroy();
  328. } );
  329. it( 'should render attribute changes', () => {
  330. const domRoot = document.createElement( 'div' );
  331. const view = new View();
  332. const viewDocument = view.document;
  333. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  334. view.attachDomRoot( domRoot );
  335. const viewP = new ViewElement( 'p', { class: 'foo' } );
  336. viewRoot._appendChild( viewP );
  337. view.render();
  338. expect( domRoot.childNodes.length ).to.equal( 1 );
  339. expect( domRoot.childNodes[ 0 ].getAttribute( 'class' ) ).to.equal( 'foo' );
  340. viewP._setAttribute( 'class', 'bar' );
  341. view.render();
  342. expect( domRoot.childNodes.length ).to.equal( 1 );
  343. expect( domRoot.childNodes[ 0 ].getAttribute( 'class' ) ).to.equal( 'bar' );
  344. view.destroy();
  345. domRoot.remove();
  346. } );
  347. } );
  348. describe( 'change()', () => {
  349. it( 'should throw when someone tries to change view during rendering', () => {
  350. const domDiv = document.createElement( 'div' );
  351. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  352. let renderingCalled = false;
  353. view.attachDomRoot( domDiv );
  354. view.change( writer => {
  355. const p = writer.createContainerElement( 'p' );
  356. const ui = writer.createUIElement( 'span', null, function( domDocument ) {
  357. const element = this.toDomElement( domDocument );
  358. expect( () => view.change( () => {} ) ).to.throw( CKEditorError, /^cannot-change-view-tree/ );
  359. renderingCalled = true;
  360. return element;
  361. } );
  362. writer.insert( ViewPosition.createAt( p ), ui );
  363. writer.insert( ViewPosition.createAt( viewRoot ), p );
  364. } );
  365. expect( renderingCalled ).to.be.true;
  366. domDiv.remove();
  367. } );
  368. it( 'should throw when someone tries to use change() method in post-fixer', () => {
  369. const domDiv = document.createElement( 'div' );
  370. createViewRoot( viewDocument, 'div', 'main' );
  371. view.attachDomRoot( domDiv );
  372. viewDocument.registerPostFixer( () => {
  373. expect( () => {
  374. view.change( () => {} );
  375. } ).to.throw( CKEditorError, /^cannot-change-view-tree/ );
  376. } );
  377. view.render();
  378. domDiv.remove();
  379. } );
  380. it( 'should fire render event and it should trigger rendering before listeners on normal priority', () => {
  381. const renderSpy = sinon.spy( view._renderer, 'render' );
  382. const eventSpy = sinon.spy();
  383. view.on( 'render', eventSpy );
  384. view.change( () => {} );
  385. sinon.assert.callOrder( renderSpy, eventSpy );
  386. } );
  387. it( 'should fire render event once for nested change blocks', () => {
  388. const renderSpy = sinon.spy( view._renderer, 'render' );
  389. const eventSpy = sinon.spy();
  390. view.on( 'render', eventSpy );
  391. view.change( () => {
  392. view.change( () => {} );
  393. view.change( () => {
  394. view.change( () => {} );
  395. view.change( () => {} );
  396. } );
  397. view.change( () => {} );
  398. } );
  399. sinon.assert.calledOnce( renderSpy );
  400. sinon.assert.calledOnce( eventSpy );
  401. sinon.assert.callOrder( renderSpy, eventSpy );
  402. } );
  403. it( 'should fire render event once even if render is called during the change', () => {
  404. const renderSpy = sinon.spy( view._renderer, 'render' );
  405. const eventSpy = sinon.spy();
  406. view.on( 'render', eventSpy );
  407. view.change( () => {
  408. view.render();
  409. view.change( () => {
  410. view.render();
  411. } );
  412. view.render();
  413. } );
  414. sinon.assert.calledOnce( renderSpy );
  415. sinon.assert.calledOnce( eventSpy );
  416. sinon.assert.callOrder( renderSpy, eventSpy );
  417. } );
  418. it( 'should call post-fixers after change but before rendering', () => {
  419. const postFixer1 = sinon.spy( () => false );
  420. const postFixer2 = sinon.spy( () => false );
  421. const changeSpy = sinon.spy();
  422. const eventSpy = sinon.spy();
  423. viewDocument.registerPostFixer( postFixer1 );
  424. viewDocument.registerPostFixer( postFixer2 );
  425. view.on( 'render', eventSpy );
  426. view.change( changeSpy );
  427. sinon.assert.calledOnce( postFixer1 );
  428. sinon.assert.calledOnce( postFixer2 );
  429. sinon.assert.calledOnce( changeSpy );
  430. sinon.assert.calledOnce( eventSpy );
  431. sinon.assert.callOrder( changeSpy, postFixer1, postFixer2, eventSpy );
  432. } );
  433. it( 'should call post-fixers until all are done', () => {
  434. let called = false;
  435. const postFixer1 = sinon.spy();
  436. const postFixer2 = sinon.spy();
  437. const changeSpy = sinon.spy();
  438. const eventSpy = sinon.spy();
  439. viewDocument.registerPostFixer( () => {
  440. if ( !called ) {
  441. called = true;
  442. postFixer1();
  443. return true;
  444. }
  445. postFixer2();
  446. return false;
  447. } );
  448. view.on( 'render', eventSpy );
  449. view.change( changeSpy );
  450. sinon.assert.calledOnce( postFixer1 );
  451. sinon.assert.calledOnce( postFixer2 );
  452. sinon.assert.calledOnce( changeSpy );
  453. sinon.assert.calledOnce( eventSpy );
  454. sinon.assert.callOrder( changeSpy, postFixer1, postFixer2, eventSpy );
  455. } );
  456. } );
  457. describe( 'destroy()', () => {
  458. it( 'should destroy all observers', () => {
  459. const observerMock = view.addObserver( ObserverMock );
  460. view.destroy();
  461. sinon.assert.calledOnce( observerMock.destroy );
  462. } );
  463. } );
  464. } );