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imageloadobserver.js 4.1 KB

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  1. /**
  2. * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.
  3. * For licensing, see LICENSE.md.
  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 Position from '@ckeditor/ckeditor5-engine/src/view/position';
  10. import Range from '@ckeditor/ckeditor5-engine/src/view/range';
  11. import createViewRoot from '@ckeditor/ckeditor5-engine/tests/view/_utils/createroot';
  12. import { setData } from '@ckeditor/ckeditor5-engine/src/dev-utils/view';
  13. describe( 'ImageLoadObserver', () => {
  14. let view, viewDocument, observer, domRoot, viewRoot;
  15. beforeEach( () => {
  16. view = new View();
  17. viewDocument = view.document;
  18. observer = view.addObserver( ImageLoadObserver );
  19. viewRoot = createViewRoot( viewDocument );
  20. domRoot = document.createElement( 'div' );
  21. view.attachDomRoot( domRoot );
  22. } );
  23. afterEach( () => {
  24. view.destroy();
  25. } );
  26. it( 'should extend Observer', () => {
  27. expect( observer ).instanceof( Observer );
  28. } );
  29. it( 'should fire `loadImage` event for images in the document that are loaded with a delay', () => {
  30. const spy = sinon.spy();
  31. viewDocument.on( 'imageLoaded', spy );
  32. setData( view, '<img src="foo.png" />' );
  33. sinon.assert.notCalled( spy );
  34. domRoot.querySelector( 'img' ).dispatchEvent( new Event( 'load' ) );
  35. sinon.assert.calledOnce( spy );
  36. } );
  37. it( 'should fire `layoutChanged` along with `imageLoaded` event', () => {
  38. const layoutChangedSpy = sinon.spy();
  39. const imageLoadedSpy = sinon.spy();
  40. view.document.on( 'layoutChanged', layoutChangedSpy );
  41. view.document.on( 'imageLoaded', imageLoadedSpy );
  42. observer._fireEvents( {} );
  43. sinon.assert.calledOnce( layoutChangedSpy );
  44. sinon.assert.calledOnce( imageLoadedSpy );
  45. } );
  46. it( 'should not fire events when observer is disabled', () => {
  47. const layoutChangedSpy = sinon.spy();
  48. const imageLoadedSpy = sinon.spy();
  49. view.document.on( 'layoutChanged', layoutChangedSpy );
  50. view.document.on( 'imageLoaded', imageLoadedSpy );
  51. observer.isEnabled = false;
  52. observer._fireEvents( {} );
  53. sinon.assert.notCalled( layoutChangedSpy );
  54. sinon.assert.notCalled( imageLoadedSpy );
  55. } );
  56. it( 'should not fire `loadImage` event for images removed from document', () => {
  57. const spy = sinon.spy();
  58. viewDocument.on( 'imageLoaded', spy );
  59. setData( view, '<img src="foo.png" />' );
  60. sinon.assert.notCalled( spy );
  61. const img = domRoot.querySelector( 'img' );
  62. setData( view, '' );
  63. img.dispatchEvent( new Event( 'load' ) );
  64. sinon.assert.notCalled( spy );
  65. } );
  66. it( 'should do nothing with an image when changes are in the other parent', () => {
  67. setData( view, '<container:p><attribute:b>foo</attribute:b></container:p><container:div><img src="foo.png" /></container:div>' );
  68. const viewP = viewRoot.getChild( 0 );
  69. const viewDiv = viewRoot.getChild( 1 );
  70. const mapSpy = sinon.spy( view.domConverter, 'mapViewToDom' );
  71. // Change only the paragraph.
  72. view.change( writer => {
  73. const text = writer.createText( 'foo', { b: true } );
  74. writer.insert( Position.createAt( viewRoot.getChild( 0 ).getChild( 0 ) ), text );
  75. writer.wrap( Range.createOn( text ), writer.createAttributeElement( 'b' ) );
  76. } );
  77. sinon.assert.calledWith( mapSpy, viewP );
  78. sinon.assert.neverCalledWith( mapSpy, viewDiv );
  79. } );
  80. it( 'should not throw when synced child was removed in the meanwhile', () => {
  81. let viewDiv;
  82. const mapSpy = sinon.spy( view.domConverter, 'mapViewToDom' );
  83. view.change( writer => {
  84. viewDiv = writer.createContainerElement( 'div' );
  85. viewRoot.fire( 'change:children', viewDiv );
  86. } );
  87. expect( () => {
  88. view._renderer.render();
  89. sinon.assert.calledWith( mapSpy, viewDiv );
  90. } ).to.not.throw();
  91. } );
  92. it( 'should stop observing images on destroy', () => {
  93. const spy = sinon.spy();
  94. viewDocument.on( 'imageLoaded', spy );
  95. setData( view, '<img src="foo.png" />' );
  96. observer.destroy();
  97. domRoot.querySelector( 'img' ).dispatchEvent( new Event( 'load' ) );
  98. sinon.assert.notCalled( spy );
  99. } );
  100. } );