/**
* @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/* globals document, Event */
import ImageLoadObserver from '../../src/image/imageloadobserver';
import Observer from '@ckeditor/ckeditor5-engine/src/view/observer/observer';
import View from '@ckeditor/ckeditor5-engine/src/view/view';
import createViewRoot from '@ckeditor/ckeditor5-engine/tests/view/_utils/createroot';
import { setData } from '@ckeditor/ckeditor5-engine/src/dev-utils/view';
describe( 'ImageLoadObserver', () => {
let view, viewDocument, observer, domRoot, viewRoot;
beforeEach( () => {
view = new View();
viewDocument = view.document;
observer = view.addObserver( ImageLoadObserver );
viewRoot = createViewRoot( viewDocument );
domRoot = document.createElement( 'div' );
view.attachDomRoot( domRoot );
} );
afterEach( () => {
view.destroy();
} );
it( 'should extend Observer', () => {
expect( observer ).instanceof( Observer );
} );
it( 'should fire `loadImage` event for images in the document that are loaded with a delay', () => {
const spy = sinon.spy();
viewDocument.on( 'imageLoaded', spy );
setData( view, '
' );
sinon.assert.notCalled( spy );
domRoot.querySelector( 'img' ).dispatchEvent( new Event( 'load' ) );
sinon.assert.calledOnce( spy );
} );
it( 'should fire `layoutChanged` along with `imageLoaded` event', () => {
const layoutChangedSpy = sinon.spy();
const imageLoadedSpy = sinon.spy();
view.document.on( 'layoutChanged', layoutChangedSpy );
view.document.on( 'imageLoaded', imageLoadedSpy );
observer._fireEvents( {} );
sinon.assert.calledOnce( layoutChangedSpy );
sinon.assert.calledOnce( imageLoadedSpy );
} );
it( 'should not fire events when observer is disabled', () => {
const layoutChangedSpy = sinon.spy();
const imageLoadedSpy = sinon.spy();
view.document.on( 'layoutChanged', layoutChangedSpy );
view.document.on( 'imageLoaded', imageLoadedSpy );
observer.isEnabled = false;
observer._fireEvents( {} );
sinon.assert.notCalled( layoutChangedSpy );
sinon.assert.notCalled( imageLoadedSpy );
} );
it( 'should not fire `loadImage` event for images removed from document', () => {
const spy = sinon.spy();
viewDocument.on( 'imageLoaded', spy );
setData( view, '
' );
sinon.assert.notCalled( spy );
const img = domRoot.querySelector( 'img' );
setData( view, '' );
img.dispatchEvent( new Event( 'load' ) );
sinon.assert.notCalled( spy );
} );
it( 'should do nothing with an image when changes are in the other parent', () => {
setData(
view,
'foo
'
);
const viewP = viewRoot.getChild( 0 );
const viewDiv = viewRoot.getChild( 1 );
const mapSpy = sinon.spy( view.domConverter, 'mapViewToDom' );
// Change only the paragraph.
view.change( writer => {
const text = writer.createText( 'foo', { b: true } );
writer.insert( writer.createPositionAt( viewRoot.getChild( 0 ).getChild( 0 ), 0 ), text );
writer.wrap( writer.createRangeOn( text ), writer.createAttributeElement( 'b' ) );
} );
sinon.assert.calledWith( mapSpy, viewP );
sinon.assert.neverCalledWith( mapSpy, viewDiv );
} );
it( 'should not throw when synced child was removed in the meanwhile', () => {
let viewDiv;
const mapSpy = sinon.spy( view.domConverter, 'mapViewToDom' );
view.change( writer => {
viewDiv = writer.createContainerElement( 'div' );
viewRoot.fire( 'change:children', viewDiv );
} );
expect( () => {
view._renderer.render();
sinon.assert.calledWith( mapSpy, viewDiv );
} ).to.not.throw();
} );
it( 'should stop observing images on destroy', () => {
const spy = sinon.spy();
viewDocument.on( 'imageLoaded', spy );
setData( view, '
' );
observer.destroy();
domRoot.querySelector( 'img' ).dispatchEvent( new Event( 'load' ) );
sinon.assert.notCalled( spy );
} );
} );