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+/**
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+ * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.
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+ * For licensing, see LICENSE.md.
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+ */
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+
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+/* globals document, Event */
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+
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+import ImageLoadObserver from '../../src/image/imageloadobserver';
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+import View from '@ckeditor/ckeditor5-engine/src/view/view';
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+import Position from '@ckeditor/ckeditor5-engine/src/view/position';
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+import Range from '@ckeditor/ckeditor5-engine/src/view/range';
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+import createViewRoot from '@ckeditor/ckeditor5-engine/tests/view/_utils/createroot';
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+import { setData } from '@ckeditor/ckeditor5-engine/src/dev-utils/view';
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+
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+describe( 'ClickObserver', () => {
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+ let view, viewDocument, observer, domRoot, viewRoot;
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+
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+ beforeEach( () => {
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+ view = new View();
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+ viewDocument = view.document;
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+ observer = view.addObserver( ImageLoadObserver );
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+
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+ viewRoot = createViewRoot( viewDocument );
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+ domRoot = document.createElement( 'div' );
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+ view.attachDomRoot( domRoot );
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+ } );
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+
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+ afterEach( () => {
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+ view.destroy();
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+ } );
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+
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+ it( 'should fire `loadImage` event for images in the document that are loaded with a delay', () => {
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+ const spy = sinon.spy();
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+
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+ viewDocument.on( 'imageLoad', spy );
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+
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+ setData( view, '<img src="foo.png" />' );
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+
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+ sinon.assert.notCalled( spy );
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+
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+ domRoot.querySelector( 'img' ).dispatchEvent( new Event( 'load' ) );
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+
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+ sinon.assert.calledOnce( spy );
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+ } );
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+
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+ it( 'should not fire `loadImage` event for images removed from document', () => {
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+ const spy = sinon.spy();
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+
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+ viewDocument.on( 'imageLoad', spy );
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+
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+ setData( view, '<img src="foo.png" />' );
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+
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+ sinon.assert.notCalled( spy );
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+
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+ const img = domRoot.querySelector( 'img' );
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+
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+ setData( view, '' );
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+
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+ img.dispatchEvent( new Event( 'load' ) );
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+
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+ sinon.assert.notCalled( spy );
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+ } );
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+
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+ it( 'should do nothing with an image when changes are in the other parent', () => {
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+ setData( view, '<container:p><attribute:b>foo</attribute:b></container:p><container:div><img src="foo.png" /></container:div>' );
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+
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+ const viewP = viewRoot.getChild( 0 );
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+ const viewDiv = viewRoot.getChild( 1 );
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+
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+ const mapSpy = sinon.spy( view.domConverter, 'mapViewToDom' );
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+
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+ // Change only the paragraph.
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+ view.change( writer => {
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+ const text = writer.createText( 'foo', { b: true } );
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+
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+ writer.insert( Position.createAt( viewRoot.getChild( 0 ).getChild( 0 ) ), text );
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+ writer.wrap( Range.createOn( text ), writer.createAttributeElement( 'b' ) );
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+ } );
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+
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+ sinon.assert.calledWith( mapSpy, viewP );
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+ sinon.assert.neverCalledWith( mapSpy, viewDiv );
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+ } );
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+
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+ it( 'should call `view#render` along with `imageLoad` event', () => {
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+ const renderSpy = sinon.spy();
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+ const imageLoadSpy = sinon.spy();
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+
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+ view.on( 'render', renderSpy );
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+ view.document.on( 'imageLoad', imageLoadSpy );
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+
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+ observer.onDomEvent( {} );
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+
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+ sinon.assert.calledOnce( renderSpy );
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+ sinon.assert.calledOnce( imageLoadSpy );
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+ } );
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+} );
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