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view.js 18 KB

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