imageloadobserver.js 4.5 KB

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  1. /**
  2. * @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
  3. * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  4. */
  5. /* globals document, Event */
  6. import ImageLoadObserver from '../../src/image/imageloadobserver';
  7. import Observer from '@ckeditor/ckeditor5-engine/src/view/observer/observer';
  8. import View from '@ckeditor/ckeditor5-engine/src/view/view';
  9. import createViewRoot from '@ckeditor/ckeditor5-engine/tests/view/_utils/createroot';
  10. import { setData } from '@ckeditor/ckeditor5-engine/src/dev-utils/view';
  11. import { StylesProcessor } from '@ckeditor/ckeditor5-engine/src/view/stylesmap';
  12. describe( 'ImageLoadObserver', () => {
  13. let view, viewDocument, observer, domRoot, viewRoot;
  14. beforeEach( () => {
  15. view = new View( new StylesProcessor() );
  16. viewDocument = view.document;
  17. observer = view.addObserver( ImageLoadObserver );
  18. viewRoot = createViewRoot( viewDocument );
  19. domRoot = document.createElement( 'div' );
  20. view.attachDomRoot( domRoot );
  21. } );
  22. afterEach( () => {
  23. view.destroy();
  24. } );
  25. it( 'should extend Observer', () => {
  26. expect( observer ).instanceof( Observer );
  27. } );
  28. it( 'should fire `loadImage` event for images in the document that are loaded with a delay', () => {
  29. const spy = sinon.spy();
  30. viewDocument.on( 'imageLoaded', spy );
  31. setData( view, '<img src="/assets/sample.png" />' );
  32. sinon.assert.notCalled( spy );
  33. domRoot.querySelector( 'img' ).dispatchEvent( new Event( 'load' ) );
  34. sinon.assert.calledOnce( spy );
  35. } );
  36. it( 'should fire `layoutChanged` along with `imageLoaded` event', () => {
  37. const layoutChangedSpy = sinon.spy();
  38. const imageLoadedSpy = sinon.spy();
  39. view.document.on( 'layoutChanged', layoutChangedSpy );
  40. view.document.on( 'imageLoaded', imageLoadedSpy );
  41. observer._fireEvents( {} );
  42. sinon.assert.calledOnce( layoutChangedSpy );
  43. sinon.assert.calledOnce( imageLoadedSpy );
  44. } );
  45. it( 'should not fire events when observer is disabled', () => {
  46. const layoutChangedSpy = sinon.spy();
  47. const imageLoadedSpy = sinon.spy();
  48. view.document.on( 'layoutChanged', layoutChangedSpy );
  49. view.document.on( 'imageLoaded', imageLoadedSpy );
  50. observer.isEnabled = false;
  51. observer._fireEvents( {} );
  52. sinon.assert.notCalled( layoutChangedSpy );
  53. sinon.assert.notCalled( imageLoadedSpy );
  54. } );
  55. it( 'should not fire `loadImage` event for images removed from document', () => {
  56. const spy = sinon.spy();
  57. viewDocument.on( 'imageLoaded', spy );
  58. setData( view, '<img src="/assets/sample.png" />' );
  59. sinon.assert.notCalled( spy );
  60. const img = domRoot.querySelector( 'img' );
  61. setData( view, '' );
  62. img.dispatchEvent( new Event( 'load' ) );
  63. sinon.assert.notCalled( spy );
  64. } );
  65. it( 'should not fire `loadImage` event for non-image elements', () => {
  66. const spy = sinon.spy();
  67. viewDocument.on( 'imageLoaded', spy );
  68. setData( view, '<p>foo</p>' );
  69. sinon.assert.notCalled( spy );
  70. const img = domRoot.querySelector( 'p' );
  71. img.dispatchEvent( new Event( 'load' ) );
  72. sinon.assert.notCalled( spy );
  73. } );
  74. it( 'should do nothing with an image when changes are in the other parent', () => {
  75. setData(
  76. view,
  77. '<container:p><attribute:b>foo</attribute:b></container:p><container:div><img src="/assets/sample.png" /></container:div>'
  78. );
  79. const viewP = viewRoot.getChild( 0 );
  80. const viewDiv = viewRoot.getChild( 1 );
  81. const mapSpy = sinon.spy( view.domConverter, 'mapViewToDom' );
  82. // Change only the paragraph.
  83. view.change( writer => {
  84. const text = writer.createText( 'foo', { b: true } );
  85. writer.insert( writer.createPositionAt( viewRoot.getChild( 0 ).getChild( 0 ), 0 ), text );
  86. writer.wrap( writer.createRangeOn( text ), writer.createAttributeElement( 'b' ) );
  87. } );
  88. sinon.assert.calledWith( mapSpy, viewP );
  89. sinon.assert.neverCalledWith( mapSpy, viewDiv );
  90. } );
  91. it( 'should not throw when synced child was removed in the meanwhile', () => {
  92. let viewDiv;
  93. const mapSpy = sinon.spy( view.domConverter, 'mapViewToDom' );
  94. view.change( writer => {
  95. viewDiv = writer.createContainerElement( 'div' );
  96. viewRoot.fire( 'change:children', viewDiv );
  97. } );
  98. expect( () => {
  99. view._renderer.render();
  100. sinon.assert.calledWith( mapSpy, viewDiv );
  101. } ).to.not.throw();
  102. } );
  103. it( 'should stop observing images on destroy', () => {
  104. const spy = sinon.spy();
  105. viewDocument.on( 'imageLoaded', spy );
  106. setData( view, '<img src="/assets/sample.png" />' );
  107. observer.destroy();
  108. domRoot.querySelector( 'img' ).dispatchEvent( new Event( 'load' ) );
  109. sinon.assert.notCalled( spy );
  110. } );
  111. } );