ckeditor5-image-upload-base64
Version:
The development environment of CKEditor 5 – the best browser-based rich text editor.
62 lines (55 loc) • 1.97 kB
JavaScript
/**
* @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/**
* @module image/image/imageloadobserver
*/
import Observer from '@ckeditor/ckeditor5-engine/src/view/observer/observer';
/**
* Observes all new images added to the {@link module:engine/view/document~Document},
* fires {@link module:engine/view/document~Document#event:imageLoaded} and
* {@link module:engine/view/document~Document#event:layoutChanged} event every time when the new image
* has been loaded.
*
* **Note:** This event is not fired for images that has been added to the document and rendered as `complete` (already loaded).
*
* @extends module:engine/view/observer/observer~Observer
*/
export default class ImageLoadObserver extends Observer {
/**
* @inheritDoc
*/
observe( domRoot ) {
this.listenTo( domRoot, 'load', ( event, domEvent ) => {
const domElement = domEvent.target;
if ( domElement.tagName == 'IMG' ) {
this._fireEvents( domEvent );
}
// Use capture phase for better performance (#4504).
}, { useCapture: true } );
}
/**
* Fires {@link module:engine/view/document~Document#event:layoutChanged} and
* {@link module:engine/view/document~Document#event:imageLoaded}
* if observer {@link #isEnabled is enabled}.
*
* @protected
* @param {Event} domEvent The DOM event.
*/
_fireEvents( domEvent ) {
if ( this.isEnabled ) {
this.document.fire( 'layoutChanged' );
this.document.fire( 'imageLoaded', domEvent );
}
}
}
/**
* Fired when an <img/> DOM element has been loaded in the DOM root.
*
* Introduced by {@link module:image/image/imageloadobserver~ImageLoadObserver}.
*
* @see module:image/image/imageloadobserver~ImageLoadObserver
* @event module:engine/view/document~Document#event:imageLoaded
* @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.
*/