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- /**
- * @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/imageupload/imageuploadprogress
- */
- /* globals setTimeout */
- import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
- import FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';
- import uploadingPlaceholder from '../../theme/icons/image_placeholder.svg';
- import { getViewImgFromWidget } from '../image/utils';
- import '../../theme/imageuploadprogress.css';
- import '../../theme/imageuploadicon.css';
- import '../../theme/imageuploadloader.css';
- /**
- * The image upload progress plugin.
- * It shows a placeholder when the image is read from the disk and a progress bar while the image is uploading.
- *
- * @extends module:core/plugin~Plugin
- */
- export default class ImageUploadProgress extends Plugin {
- /**
- * @inheritDoc
- */
- constructor( editor ) {
- super( editor );
- /**
- * The image placeholder that is displayed before real image data can be accessed.
- *
- * @protected
- * @member {String} #placeholder
- */
- this.placeholder = 'data:image/svg+xml;utf8,' + encodeURIComponent( uploadingPlaceholder );
- }
- /**
- * @inheritDoc
- */
- init() {
- const editor = this.editor;
- // Upload status change - update image's view according to that status.
- editor.editing.downcastDispatcher.on( 'attribute:uploadStatus:image', ( ...args ) => this.uploadStatusChange( ...args ) );
- }
- /**
- * This method is called each time the image `uploadStatus` attribute is changed.
- *
- * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.
- * @param {Object} data Additional information about the change.
- * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi
- */
- uploadStatusChange( evt, data, conversionApi ) {
- const editor = this.editor;
- const modelImage = data.item;
- const uploadId = modelImage.getAttribute( 'uploadId' );
- if ( !conversionApi.consumable.consume( data.item, evt.name ) ) {
- return;
- }
- const fileRepository = editor.plugins.get( FileRepository );
- const status = uploadId ? data.attributeNewValue : null;
- const placeholder = this.placeholder;
- const viewFigure = editor.editing.mapper.toViewElement( modelImage );
- const viewWriter = conversionApi.writer;
- if ( status == 'reading' ) {
- // Start "appearing" effect and show placeholder with infinite progress bar on the top
- // while image is read from disk.
- _startAppearEffect( viewFigure, viewWriter );
- _showPlaceholder( placeholder, viewFigure, viewWriter );
- return;
- }
- // Show progress bar on the top of the image when image is uploading.
- if ( status == 'uploading' ) {
- const loader = fileRepository.loaders.get( uploadId );
- // Start appear effect if needed - see https://github.com/ckeditor/ckeditor5-image/issues/191.
- _startAppearEffect( viewFigure, viewWriter );
- if ( !loader ) {
- // There is no loader associated with uploadId - this means that image came from external changes.
- // In such cases we still want to show the placeholder until image is fully uploaded.
- // Show placeholder if needed - see https://github.com/ckeditor/ckeditor5-image/issues/191.
- _showPlaceholder( placeholder, viewFigure, viewWriter );
- } else {
- // Hide placeholder and initialize progress bar showing upload progress.
- _hidePlaceholder( viewFigure, viewWriter );
- _showProgressBar( viewFigure, viewWriter, loader, editor.editing.view );
- _displayLocalImage( viewFigure, viewWriter, loader );
- }
- return;
- }
- if ( status == 'complete' && fileRepository.loaders.get( uploadId ) ) {
- _showCompleteIcon( viewFigure, viewWriter, editor.editing.view );
- }
- // Clean up.
- _hideProgressBar( viewFigure, viewWriter );
- _hidePlaceholder( viewFigure, viewWriter );
- _stopAppearEffect( viewFigure, viewWriter );
- }
- }
- // Adds ck-appear class to the image figure if one is not already applied.
- //
- // @param {module:engine/view/containerelement~ContainerElement} viewFigure
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- function _startAppearEffect( viewFigure, writer ) {
- if ( !viewFigure.hasClass( 'ck-appear' ) ) {
- writer.addClass( 'ck-appear', viewFigure );
- }
- }
- // Removes ck-appear class to the image figure if one is not already removed.
- //
- // @param {module:engine/view/containerelement~ContainerElement} viewFigure
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- function _stopAppearEffect( viewFigure, writer ) {
- writer.removeClass( 'ck-appear', viewFigure );
- }
- // Shows placeholder together with infinite progress bar on given image figure.
- //
- // @param {String} Data-uri with a svg placeholder.
- // @param {module:engine/view/containerelement~ContainerElement} viewFigure
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- function _showPlaceholder( placeholder, viewFigure, writer ) {
- if ( !viewFigure.hasClass( 'ck-image-upload-placeholder' ) ) {
- writer.addClass( 'ck-image-upload-placeholder', viewFigure );
- }
- const viewImg = getViewImgFromWidget( viewFigure );
- if ( viewImg.getAttribute( 'src' ) !== placeholder ) {
- writer.setAttribute( 'src', placeholder, viewImg );
- }
- if ( !_getUIElement( viewFigure, 'placeholder' ) ) {
- writer.insert( writer.createPositionAfter( viewImg ), _createPlaceholder( writer ) );
- }
- }
- // Removes placeholder together with infinite progress bar on given image figure.
- //
- // @param {module:engine/view/containerelement~ContainerElement} viewFigure
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- function _hidePlaceholder( viewFigure, writer ) {
- if ( viewFigure.hasClass( 'ck-image-upload-placeholder' ) ) {
- writer.removeClass( 'ck-image-upload-placeholder', viewFigure );
- }
- _removeUIElement( viewFigure, writer, 'placeholder' );
- }
- // Shows progress bar displaying upload progress.
- // Attaches it to the file loader to update when upload percentace is changed.
- //
- // @param {module:engine/view/containerelement~ContainerElement} viewFigure
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- // @param {module:upload/filerepository~FileLoader} loader
- // @param {module:engine/view/view~View} view
- function _showProgressBar( viewFigure, writer, loader, view ) {
- const progressBar = _createProgressBar( writer );
- writer.insert( writer.createPositionAt( viewFigure, 'end' ), progressBar );
- // Update progress bar width when uploadedPercent is changed.
- loader.on( 'change:uploadedPercent', ( evt, name, value ) => {
- view.change( writer => {
- writer.setStyle( 'width', value + '%', progressBar );
- } );
- } );
- }
- // Hides upload progress bar.
- //
- // @param {module:engine/view/containerelement~ContainerElement} viewFigure
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- function _hideProgressBar( viewFigure, writer ) {
- _removeUIElement( viewFigure, writer, 'progressBar' );
- }
- // Shows complete icon and hides after a certain amount of time.
- //
- // @param {module:engine/view/containerelement~ContainerElement} viewFigure
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- // @param {module:engine/view/view~View} view
- function _showCompleteIcon( viewFigure, writer, view ) {
- const completeIcon = writer.createUIElement( 'div', { class: 'ck-image-upload-complete-icon' } );
- writer.insert( writer.createPositionAt( viewFigure, 'end' ), completeIcon );
- setTimeout( () => {
- view.change( writer => writer.remove( writer.createRangeOn( completeIcon ) ) );
- }, 3000 );
- }
- // Create progress bar element using {@link module:engine/view/uielement~UIElement}.
- //
- // @private
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- // @returns {module:engine/view/uielement~UIElement}
- function _createProgressBar( writer ) {
- const progressBar = writer.createUIElement( 'div', { class: 'ck-progress-bar' } );
- writer.setCustomProperty( 'progressBar', true, progressBar );
- return progressBar;
- }
- // Create placeholder element using {@link module:engine/view/uielement~UIElement}.
- //
- // @private
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- // @returns {module:engine/view/uielement~UIElement}
- function _createPlaceholder( writer ) {
- const placeholder = writer.createUIElement( 'div', { class: 'ck-upload-placeholder-loader' } );
- writer.setCustomProperty( 'placeholder', true, placeholder );
- return placeholder;
- }
- // Returns {@link module:engine/view/uielement~UIElement} of given unique property from image figure element.
- // Returns `undefined` if element is not found.
- //
- // @private
- // @param {module:engine/view/element~Element} imageFigure
- // @param {String} uniqueProperty
- // @returns {module:engine/view/uielement~UIElement|undefined}
- function _getUIElement( imageFigure, uniqueProperty ) {
- for ( const child of imageFigure.getChildren() ) {
- if ( child.getCustomProperty( uniqueProperty ) ) {
- return child;
- }
- }
- }
- // Removes {@link module:engine/view/uielement~UIElement} of given unique property from image figure element.
- //
- // @private
- // @param {module:engine/view/element~Element} imageFigure
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- // @param {String} uniqueProperty
- function _removeUIElement( viewFigure, writer, uniqueProperty ) {
- const element = _getUIElement( viewFigure, uniqueProperty );
- if ( element ) {
- writer.remove( writer.createRangeOn( element ) );
- }
- }
- // Displays local data from file loader.
- //
- // @param {module:engine/view/element~Element} imageFigure
- // @param {module:engine/view/downcastwriter~DowncastWriter} writer
- // @param {module:upload/filerepository~FileLoader} loader
- function _displayLocalImage( viewFigure, writer, loader ) {
- if ( loader.data ) {
- const viewImg = getViewImgFromWidget( viewFigure );
- writer.setAttribute( 'src', loader.data, viewImg );
- }
- }
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