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- /**
- * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
- /**
- * @module image/imageupload/imageuploadprogress
- */
- 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 ViewPosition from '@ckeditor/ckeditor5-engine/src/view/position';
- import ViewRange from '@ckeditor/ckeditor5-engine/src/view/range';
- import '../../theme/imageuploadprogress.css';
- /**
- * Image upload progress plugin.
- * Shows placeholder when image is read from disk and progress bar while image is uploading.
- *
- * @extends module:core/plugin~Plugin
- */
- export default class ImageUploadProgress extends Plugin {
- /**
- * @inheritDoc
- */
- constructor( editor ) {
- super( editor );
- /**
- * Image's 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 ethod is called each time image's `uploadStatus` attribute is changed.
- *
- * @param {module:utils/eventinfo~EventInfo} evt Object containing information about the fired event.
- * @param {Object} data Additional information about the change.
- * @param {module:engine/conversion/modelconsumable~ModelConsumable} consumable Values to consume.
- * @param {Object} 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 ) || !uploadId ) {
- return;
- }
- const fileRepository = editor.plugins.get( FileRepository );
- const status = data.attributeNewValue;
- 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 );
- }
- return;
- }
- // Clean up.
- _hideProgressBar( viewFigure, viewWriter );
- _hidePlaceholder( viewFigure, viewWriter );
- _stopAppearEffect( viewFigure, viewWriter );
- }
- }
- // Symbol added to progress bar UIElement to distinguish it from other elements.
- const progressBarSymbol = Symbol( 'progress-bar' );
- // 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/writer~Writer} 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/writer~Writer} writer
- function _stopAppearEffect( viewFigure, writer ) {
- writer.removeClass( 'ck-appear', viewFigure );
- }
- // Shows placeholder together with infinite progress bar on given image figure.
- //
- // @param {module:engine/view/containerelement~ContainerElement} viewFigure
- // @param {module:engine/view/writer~Writer} writer
- function _showPlaceholder( placeholder, viewFigure, writer ) {
- if ( !viewFigure.hasClass( 'ck-image-upload-placeholder' ) ) {
- writer.addClass( 'ck-image-upload-placeholder', viewFigure );
- }
- if ( !viewFigure.hasClass( 'ck-infinite-progress' ) ) {
- writer.addClass( 'ck-infinite-progress', viewFigure );
- }
- const viewImg = viewFigure.getChild( 0 );
- if ( viewImg.getAttribute( 'src' ) !== placeholder ) {
- writer.setAttribute( 'src', placeholder, viewImg );
- }
- }
- // Removes placeholder together with infinite progress bar on given image figure.
- //
- // @param {module:engine/view/containerelement~ContainerElement} viewFigure
- // @param {module:engine/view/writer~Writer} writer
- function _hidePlaceholder( viewFigure, writer ) {
- if ( viewFigure.hasClass( 'ck-image-upload-placeholder' ) ) {
- writer.removeClass( 'ck-image-upload-placeholder', viewFigure );
- }
- if ( viewFigure.hasClass( 'ck-infinite-progress' ) ) {
- writer.removeClass( 'ck-infinite-progress', viewFigure );
- }
- }
- // 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/writer~Writer} 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( ViewPosition.createAt( 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/writer~Writer} writer
- function _hideProgressBar( viewFigure, writer ) {
- const progressBar = getProgressBar( viewFigure );
- if ( progressBar ) {
- writer.remove( ViewRange.createOn( progressBar ) );
- }
- }
- // Create progress bar element using {@link module:engine/view/uielement~UIElement}.
- //
- // @private
- // @param {module:engine/view/writer~Writer} writer
- // @returns {module:engine/view/uielement~UIElement}
- function createProgressBar( writer ) {
- const progressBar = writer.createUIElement( 'div', { class: 'ck-progress-bar' } );
- writer.setCustomProperty( progressBarSymbol, true, progressBar );
- return progressBar;
- }
- // Returns progress bar {@link module:engine/view/uielement~UIElement} from image figure element. Returns `undefined` if
- // progress bar element is not found.
- //
- // @private
- // @param {module:engine/view/element~Element} imageFigure
- // @returns {module:engine/view/uielement~UIElement|undefined}
- function getProgressBar( imageFigure ) {
- for ( const child of imageFigure.getChildren() ) {
- if ( child.getCustomProperty( progressBarSymbol ) ) {
- return child;
- }
- }
- }
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