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+/**
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+ * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
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+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
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+ */
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+
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+/* globals console, window, document */
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+
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+import ClassicEditor from '@ckeditor/ckeditor5-editor-classic/src/classiceditor';
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+
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+import MultiCommand from '@ckeditor/ckeditor5-core/src/multicommand';
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+import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
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+import ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';
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+import Command from '@ckeditor/ckeditor5-core/src/command';
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+import first from '@ckeditor/ckeditor5-utils/src/first';
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+
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+import ArticlePluginSet from '@ckeditor/ckeditor5-core/tests/_utils/articlepluginset';
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+
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+class IndentBlockCommand extends Command {
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+ /**
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+ * @inheritDoc
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+ */
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+ refresh() {
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+ this.isEnabled = this._checkEnabled();
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+ }
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+
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+ /**
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+ * Indents or outdents (depends on the {@link #constructor}'s `indentDirection` parameter) selected list items.
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+ *
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+ * @fires execute
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+ */
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+ execute() {
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+ const model = this.editor.model;
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+ const doc = model.document;
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+
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+ const itemsToChange = Array.from( doc.selection.getSelectedBlocks() );
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+
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+ model.change( () => {
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+ for ( const item of itemsToChange ) {
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+ console.log( 'indent block', item );
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+ }
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+ } );
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+ }
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+
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+ /**
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+ * Checks whether the command can be enabled in the current context.
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+ *
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+ * @private
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+ * @returns {Boolean} Whether the command should be enabled.
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+ */
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+ _checkEnabled() {
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+ // Check whether any of position's ancestor is a list item.
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+ const block = first( this.editor.model.document.selection.getSelectedBlocks() );
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+
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+ // If selection is not in a list item, the command is disabled.
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+ if ( !block || !this.editor.model.schema.checkAttribute( block, 'indent' ) ) {
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+ return false;
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+ }
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+
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+ return true;
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+ }
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+}
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+
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+class IndentOutdent extends Plugin {
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+ init() {
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+ const editor = this.editor;
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+ const t = editor.t;
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+
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+ this._createButton( 'indent', t( 'Indent' ) );
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+ // this._createButton( 'outdent', t( 'Outdent' ) );
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+ this._createButton( 'indentList', t( 'Indent List' ) );
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+ // this._createButton( 'outdentList', t( 'Outdent List' ) );
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+ this._createButton( 'indentBlock', t( 'Indent Block' ) );
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+ // this._createButton( 'outdentBlock', t( 'Outdent Block' ) );
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+ }
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+
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+ _createButton( commandName, label ) {
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+ const editor = this.editor;
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+
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+ editor.ui.componentFactory.add( commandName, locale => {
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+ const command = editor.commands.get( commandName );
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+ const view = new ButtonView( locale );
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+
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+ view.set( {
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+ label,
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+ withText: true,
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+ tooltip: true
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+ } );
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+
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+ view.bind( 'isOn', 'isEnabled' ).to( command, 'value', 'isEnabled' );
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+
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+ // Execute command.
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+ this.listenTo( view, 'execute', () => editor.execute( commandName ) );
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+
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+ return view;
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+ } );
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+ }
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+
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+ afterInit() {
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+ const editor = this.editor;
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+
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+ editor.commands.add( 'indentBlock', new IndentBlockCommand( editor ) );
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+
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+ const indentCommand = new MultiCommand( editor );
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+
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+ indentCommand.registerChildCommand( editor.commands.get( 'indentList' ) );
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+ indentCommand.registerChildCommand( editor.commands.get( 'indentBlock' ) );
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+
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+ editor.commands.add( 'indent', indentCommand );
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+
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+ // TODO nicer API?
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+ // editor.commands.add( 'indentList', new Command(), 'indent' );
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+ // editor.commands.addMulti( 'indentList', new Command(), 'indent' );
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+ // editor.commands.addMulti( 'indentList', 'indent' );
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+
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+ const outdentCommand = new MultiCommand( editor );
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+ outdentCommand.registerChildCommand( editor.commands.get( 'outdentList' ) );
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+ editor.commands.add( 'outdent', outdentCommand );
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+ }
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+}
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+
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+class IndentBlock extends Plugin {
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+ init() {
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+ const schema = this.editor.model.schema;
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+ const conversion = this.editor.conversion;
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+
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+ schema.extend( 'paragraph', { allowAttributes: 'indent' } );
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+ schema.extend( 'heading1', { allowAttributes: 'indent' } );
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+
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+ conversion.for( 'upcast' ).attributeToAttribute( {
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+ view: {
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+ styles: {
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+ 'margin-left': /[\s\S]+/
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+ }
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+ },
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+ model: {
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+ key: 'indent',
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+ value: viewElement => {
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+ return viewElement.getStyle( 'margin-left' );
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+ }
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+ }
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+ } );
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+
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+ conversion.for( 'downcast' ).attributeToAttribute( {
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+ model: 'indent',
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+ view: modelAttributeValue => {
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+ return {
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+ key: 'style',
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+ value: {
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+ 'margin-left': modelAttributeValue
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+ }
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+ };
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+ }
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+ } );
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+ }
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+}
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+
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+ClassicEditor
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+ .create( document.querySelector( '#editor' ), {
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+ plugins: [ ArticlePluginSet, IndentOutdent, IndentBlock ],
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+ toolbar: [
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+ 'heading',
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+ // '|',
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+ // 'bold',
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+ // 'italic',
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+ // 'link',
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+ '|',
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+ 'indent',
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+ 'outdent',
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+ '|',
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+ 'indentList',
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+ 'outdentList',
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+ '|',
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+ 'indentBlock',
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+ 'outdentBlock',
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+ '|',
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+ 'bulletedList',
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+ 'numberedList',
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+ '|',
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+ // 'blockQuote',
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+ // 'insertTable',
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+ // 'mediaEmbed',
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+ 'undo',
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+ 'redo'
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+ ],
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+ image: {
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+ toolbar: [ 'imageStyle:full', 'imageStyle:side', '|', 'imageTextAlternative' ]
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+ },
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+ table: {
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+ contentToolbar: [
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+ 'tableColumn',
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+ 'tableRow',
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+ 'mergeTableCells'
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+ ]
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+ }
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+ } )
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+ .then( editor => {
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+ window.editor = editor;
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+ } )
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+ .catch( err => {
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+ console.error( err.stack );
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+ } );
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