Browse Source

Merge branch 't/432'

Piotrek Koszuliński 9 years ago
parent
commit
9c96b23685

+ 8 - 0
packages/ckeditor5-engine/src/conversion/mapper.js

@@ -55,6 +55,14 @@ export default class Mapper {
 		this._viewToModelMapping.set( viewElement, modelElement );
 	}
 
+	/**
+	 * Removes all model to view and view to model bindings.
+	 */
+	clearBindings() {
+		this._modelToViewMapping = new WeakMap();
+		this._viewToModelMapping = new WeakMap();
+	}
+
 	/**
 	 * Gets the corresponding model element.
 	 *

+ 13 - 13
packages/ckeditor5-engine/src/conversion/view-converter-builder.js

@@ -28,20 +28,20 @@ import isIterable from '../../utils/isiterable.js';
  *
  * 2. View element to model attribute:
  *
- *		BuildViewConverterFor( dispatcher ).fromElement( 'b' ).fromElement( 'strong' ).toAttributes( { bold: true } );
+ *		BuildViewConverterFor( dispatcher ).fromElement( 'b' ).fromElement( 'strong' ).toAttribute( 'bold', 'true' );
  *
  * 3. View attribute to model attribute:
  *
- *		BuildViewConverterFor( dispatcher ).fromAttribute( 'style', { 'font-weight': 'bold' } ).toAttributes( { bold: true } );
+ *		BuildViewConverterFor( dispatcher ).fromAttribute( 'style', { 'font-weight': 'bold' } ).toAttribute( 'bold', 'true' );
  *		BuildViewConverterFor( dispatcher )
  *			.fromAttribute( 'class' )
- *			.toAttributes( ( viewElement ) => ( { class: viewElement.getAttribute( 'class' ) } ) );
+ *			.toAttribute( ( viewElement ) => ( { class: viewElement.getAttribute( 'class' ) } ) );
  *
  * 4. View elements and attributes to model attribute:
  *
  *		BuildViewConverterFor( dispatcher )
  *			.fromElement( 'b' ).fromElement( 'strong' ).fromAttribute( 'style', { 'font-weight': 'bold' } )
- *			.toAttributes( { bold: true } );
+ *			.toAttribute( 'bold', 'true' );
  *
  * 5. View {@link engine.view.Matcher view element matcher instance} or {@link engine.view.Matcher#add matcher pattern}
  * to model element or attribute:
@@ -50,13 +50,13 @@ import isIterable from '../../utils/isiterable.js';
  *		matcher.add( 'div', { class: 'quote' } );
  *		BuildViewConverterFor( dispatcher ).from( matcher ).toElement( 'quote' );
  *
- *		BuildViewConverterFor( dispatcher ).from( { name: 'span', class: 'bold' } ).toAttributes( { bold: true } );
+ *		BuildViewConverterFor( dispatcher ).from( { name: 'span', class: 'bold' } ).toAttribute( 'bold', 'true' );
  *
  * Note, that converters built using `ViewConverterBuilder` automatically check {@link engine.model.Schema schema}
  * if created model structure is valid. If given conversion would be invalid according to schema, it is ignored.
  *
  * It is possible to provide creator functions as parameters for {@link engine.conversion.ViewConverterBuilder#toElement}
- * and {@link engine.conversion.ViewConverterBuilder#toAttributes} methods. See their descriptions to learn more.
+ * and {@link engine.conversion.ViewConverterBuilder#toAttribute} methods. See their descriptions to learn more.
  *
  * By default, converter will {@link engine.conversion.ViewConsumable#consume consume} every value specified in
  * given `from...` query, i.e. `.from( { name: 'span', class: 'bold' } )` will make converter consume both `span` name
@@ -118,7 +118,7 @@ class ViewConverterBuilder {
 	/**
 	 * Registers what view attribute should be converted.
 	 *
-	 *		BuildViewConverterFor( dispatcher ).fromAttribute( 'style', { 'font-weight': 'bold' } ).toAttributes( { bold: true } );
+	 *		BuildViewConverterFor( dispatcher ).fromAttribute( 'style', { 'font-weight': 'bold' } ).toAttribute( 'bold', 'true' );
 	 *
 	 * @chainable
 	 * @param {String|RegExp} key View attribute key.
@@ -140,7 +140,7 @@ class ViewConverterBuilder {
 	 *		matcher.add( 'div', { class: 'quote' } );
 	 *		BuildViewConverterFor( dispatcher ).from( matcher ).toElement( 'quote' );
 	 *
-	 *		BuildViewConverterFor( dispatcher ).from( { name: 'span', class: 'bold' } ).toAttributes( { bold: true } );
+	 *		BuildViewConverterFor( dispatcher ).from( { name: 'span', class: 'bold' } ).toAttribute( 'bold', 'true' );
 	 *
 	 * @chainable
 	 * @param {Object|engine.view.Matcher} matcher View matcher or view matcher pattern.
@@ -171,7 +171,7 @@ class ViewConverterBuilder {
 	 *		// span element would not be fired.
 	 *		BuildViewConverterFor( dispatcher )
 	 *			.from( { name: 'span', class: 'bold' } ).consuming( { class: 'bold' } )
-	 *			.toAttribute( { bold: true } );
+	 *			.toAttribute( 'bold', 'true' } );
 	 *
 	 *		BuildViewConverterFor( dispatcher )
 	 *			.fromElement( 'img' ).consuming( { name: true, attributes: [ 'src', 'title' ] } )
@@ -206,9 +206,9 @@ class ViewConverterBuilder {
 	 *			.from( { name: 'p', class: 'custom' } ).withPriority( 9 )
 	 *			.toElement( 'customParagraph' );
 	 *
-	 * **Note:** `ViewConverterBuilder` takes care so all `toElement` conversions takes place before all `toAttributes`
-	 * conversions. This is done by setting default `toElement` priority to `10` and `toAttributes` priority to `1000`.
-	 * It is recommended to set converter priority for `toElement` conversions below `500` and `toAttributes` priority
+	 * **Note:** `ViewConverterBuilder` takes care so all `toElement` conversions takes place before all `toAttribute`
+	 * conversions. This is done by setting default `toElement` priority to `10` and `toAttribute` priority to `1000`.
+	 * It is recommended to set converter priority for `toElement` conversions below `500` and `toAttribute` priority
 	 * above `500`. It is important that model elements are created before attributes, otherwise attributes would
 	 * not be applied or other errors may occur.
 	 *
@@ -296,7 +296,7 @@ class ViewConverterBuilder {
 	 * representing attribute key and attribute value or a function that returns an object with `key` and `value` properties.
 	 * If you provide creator function, it will be passed converted view element as first and only parameter.
 	 *
-	 *		BuildViewConverterFor( dispatcher ).fromAttribute( 'style', { 'font-weight': 'bold' } ).toAttribute( 'bold', true );
+	 *		BuildViewConverterFor( dispatcher ).fromAttribute( 'style', { 'font-weight': 'bold' } ).toAttribute( 'bold', 'true' );
 	 *		BuildViewConverterFor( dispatcher )
 	 *			.fromAttribute( 'class' )
 	 *			.toAttribute( ( viewElement ) => ( { key: 'class', value: viewElement.getAttribute( 'class' ) } ) );

+ 183 - 0
packages/ckeditor5-engine/src/datacontroller.js

@@ -5,11 +5,194 @@
 
 'use strict';
 
+import Mapper from './conversion/mapper.js';
+
+import ModelConversionDispatcher from './conversion/modelconversiondispatcher.js';
+import { insertText } from './conversion/model-to-view-converters.js';
+
+import ViewConversionDispatcher from './conversion/viewconversiondispatcher.js';
+import { convertText, convertToModelFragment } from './conversion/view-to-model-converters.js';
+
+import Writer from './view/writer.js';
+import ViewDocumentFragment from './view/documentfragment.js';
+import DomConverter from './view/domconverter.js';
+import { NBSP_FILLER } from './view/filler.js';
+
+import ModelRange from './model/range.js';
+import ModelPosition from './model/position.js';
+
+/**
+ * Controller for the data pipeline. The data pipeline controls how data is retrieved from the document
+ * and set inside it. Hence, the controller features two methods which allow to {@link engine.DataController#get get}
+ * and {@link engine.DataController#set set} data of the {@link engine.DataController#model model}
+ * using given:
+ *
+ * * {@link engine.dataProcessor.DataProcessor data processor},
+ * * {@link engine.conversion.ModelConversionDispatcher model to view} and
+ * {@link engine.conversion.ViewConversionDispatcher view to model} converters.
+ *
+ * @memberOf engine
+ */
 export default class DataController {
+	/**
+	 * Creates data controller instance.
+	 *
+	 *
+	 * @param {engine.model.Document} modelDocument Model document.
+	 * @param {engine.dataProcessor.DataProcessor} dataProcessor Data processor which should used by the controller.
+	 */
 	constructor( modelDocument, dataProcessor ) {
+		/**
+		 * Model document.
+		 *
+		 * @readonly
+		 * @member {engine.model.document} engine.DataController#model
+		 */
 		this.model = modelDocument;
+
+		/**
+		 * Data processor used during the conversion.
+		 *
+		 * @readonly
+		 * @member {engine.dataProcessor.DataProcessor} engine.DataController#processor
+		 */
 		this.processor = dataProcessor;
+
+		/**
+		 * Mapper used for the conversion. It has no permanent bindings, because they are created when getting data and
+		 * cleared directly after data are converted. However, the mapper is defined as class property, because
+		 * it needs to be passed to the `ModelConversionDispatcher` as a conversion API.
+		 *
+		 * @private
+		 * @member {engine.conversion.Mapper} engine.DataController#_mapper
+		 */
+		this._mapper = new Mapper();
+
+		/**
+		 * Writer used during the conversion.
+		 *
+		 * @private
+		 * @member {engine.view.Writer} engine.DataController#_writer
+		 */
+		this._writer = new Writer();
+
+		/**
+		 * DOM converter used during the conversion.
+		 *
+		 * @private
+		 * @member {engine.view.DomConverter} engine.DataController#_domConverter
+		 */
+		this._domConverter = new DomConverter( { blockFiller: NBSP_FILLER } );
+
+		/**
+		 * Model to view conversion dispatcher used by the {@link engine.DataController#get get method}.
+		 * To attach model to view converter to the data pipeline you need to add lister to this property:
+		 *
+		 *		data.modelToView( 'insert:$element', customInsertConverter );
+		 *
+		 * Or use {@link engine.conversion.ModelConverterBuilder}:
+		 *
+		 *		BuildModelConverterFor( data.modelToView ).fromAttribute( 'bold' ).toElement( 'b' );
+		 *
+		 * @readonly
+		 * @member {engine.conversion.ModelConversionDispatcher} engine.DataController#modelToView
+		 */
+		this.modelToView = new ModelConversionDispatcher( {
+			writer: this._writer,
+			mapper: this._mapper
+		} );
+		this.modelToView.on( 'insert:$text', insertText() );
+
+		/**
+		 * View to model conversion dispatcher used by the {@link engine.DataController#set set method}.
+		 * To attach view to model converter to the data pipeline you need to add lister to this property:
+		 *
+		 *		data.viewToModel( 'element', customElementConverter );
+		 *
+		 * Or use {@link engine.conversion.ViewConverterBuilder}:
+		 *
+		 *		BuildViewConverterFor( data.viewToModel ).fromElement( 'b' ).toAttribute( 'bold', 'true' );
+		 *
+		 * @readonly
+		 * @member {engine.conversion.ViewConversionDispatcher} engine.DataController#viewToModel
+		 */
+		this.viewToModel = new ViewConversionDispatcher( {
+			schema: modelDocument.schema
+		} );
+		this.viewToModel.on( 'text', convertText() );
+		this.viewToModel.on( 'element', convertToModelFragment(), null, 9999 );
+		this.viewToModel.on( 'documentFragment', convertToModelFragment(), null, 9999 );
+	}
+
+	/**
+	 * Returns model's data converted by the {@link engine.DataController#modelToView model to view converters} and
+	 * formatted by the {@link engine.DataController#processor data processor}.
+	 *
+	 * @param {String} [rootName='main'] Root name.
+	 * @returns {String} Output data.
+	 */
+	get( rootName = 'main' ) {
+		// Get model range.
+		const modelRoot = this.model.getRoot( rootName );
+		const modelRange = ModelRange.createFromElement( modelRoot );
+
+		// model -> view.
+		const viewDocumentFragment = new ViewDocumentFragment();
+		this._mapper.bindElements( modelRoot, viewDocumentFragment );
+
+		this.modelToView.convertInsert( modelRange );
+
+		this._mapper.clearBindings();
+
+		// view -> DOM.
+		const domDocumentFragment = this._domConverter.viewToDom( viewDocumentFragment, document );
+
+		// DOM -> data.
+		return this.processor.toData( domDocumentFragment );
+	}
+
+	/**
+	 * Sets input data parsed by the {@link engine.DataController#processor data processor} and
+	 * converted by the {@link engine.DataController#viewToModel view to model converters}.
+	 *
+	 * This method also creates a batch with all the changes applied. If all you need is to parse data use
+	 * the {@link engine.dataController#parse} method.
+	 *
+	 * @param {String} data Input data.
+	 * @param {String} [rootName='main'] Root name.
+	 */
+	set( data, rootName = 'main' ) {
+		// Save to model.
+		const modelRoot = this.model.getRoot( rootName );
+
+		this.model.batch()
+			.remove( ModelRange.createFromElement( modelRoot ) )
+			.insert( ModelPosition.createAt( modelRoot, 0 ), this.parse( data ) );
+	}
+
+	/**
+	 * Returns data parsed by the {@link engine.DataController#processor data processor} and then
+	 * converted by the {@link engine.DataController#viewToModel view to model converters}.
+	 *
+	 * @see engine.DataController#set
+	 * @param {String} data Data to parse.
+	 * @returns {engine.model.DocumentFragment} Parsed data.
+	 */
+	parse( data ) {
+		// data -> DOM.
+		const domDocumentFragment = this.processor.toDom( data );
+
+		// DOM -> view.
+		const viewDocumentFragment = this._domConverter.domToView( domDocumentFragment );
+
+		// view -> model.
+		const modelDocumentFragment = this.viewToModel.convert( viewDocumentFragment, { context: [ '$root' ] } );
+
+		return modelDocumentFragment;
 	}
 
+	/**
+	 * Removes all event listeners set by the DataController.
+	 */
 	destroy() {}
 }

+ 0 - 28
packages/ckeditor5-engine/src/dataprocessor/dataprocessor.js

@@ -1,28 +0,0 @@
-/**
- * @license Copyright (c) 2003-2016, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
-
-/**
- * DataProcessor interface. It should be implemented by actual DataProcessors.
- * Each data processor implements a certain format of the data. E.g. `MarkdownDataProcessor` will convert the data
- * (Markdown string) to a DocumentFragment and back.
- *
- * @interface engine.dataProcessor.DataProcessor
- */
-
-/**
- * Converts a DocumentFragment to data.
- *
- * @method engine.dataProcessor.DataProcessor#toData
- * @param {DocumentFragment} fragment DocumentFragment to be processed.
- * @returns {*}
- */
-
-/**
- * Converts data to a DocumentFragment.
- *
- * @method engine.dataProcessor.DataProcessor#toDom
- * @param {*} data Data to be processed.
- * @returns {DocumentFragment}
- */

+ 24 - 0
packages/ckeditor5-engine/src/dataprocessor/dataprocessor.jsdoc

@@ -6,3 +6,27 @@
 /**
  * @namespace engine.dataProcessor
  */
+
+/**
+ * DataProcessor interface. It should be implemented by actual DataProcessors.
+ * Each data processor implements a certain format of the data. E.g. `MarkdownDataProcessor` will convert the data
+ * (Markdown string) to a DocumentFragment and back.
+ *
+ * @interface engine.dataProcessor.DataProcessor
+ */
+
+/**
+ * Converts a DocumentFragment to data.
+ *
+ * @method engine.dataProcessor.DataProcessor#toData
+ * @param {DocumentFragment} fragment DocumentFragment to be processed.
+ * @returns {*}
+ */
+
+/**
+ * Converts data to a DocumentFragment.
+ *
+ * @method engine.dataProcessor.DataProcessor#toDom
+ * @param {*} data Data to be processed.
+ * @returns {DocumentFragment}
+ */

+ 1 - 1
packages/ckeditor5-engine/src/view/filler.js

@@ -56,7 +56,7 @@ export const BR_FILLER = ( domDocument ) => {
  * @see engine.view.filler.BR_FILLER
  * @member {Function} engine.view.filler.NBSP_FILLER_FILLER
  */
-export const NBSP_FILLER = ( domDocument ) => domDocument.createTextNode( ' ' );
+export const NBSP_FILLER = ( domDocument ) => domDocument.createTextNode( '\u00A0' );
 
 /**
  * Length of the {@link engine.view.filler.INLINE_FILLER INLINE_FILLER}.

+ 343 - 306
packages/ckeditor5-engine/tests/conversion/mapper.js

@@ -21,350 +21,387 @@ import ViewPosition from '/ckeditor5/engine/view/position.js';
 import ViewRange from '/ckeditor5/engine/view/range.js';
 
 describe( 'Mapper', () => {
-	let modelDiv, modelP, modelImg;
-
-	let viewDiv, viewP, viewB, viewI, viewU, viewSup, viewImg;
-	let viewTextB, viewTextO, viewTextM, viewTextX, viewTextY, viewTextZZ, viewTextFOO, viewTextBAR;
-
-	let mapper;
-
-	before( () => {
-		// Tree Model:
-		//
-		// <div>             ---> modelDiv
-		//   ├─ x
-		//   ├─ <p>          ---> modelP
-		//   │   ├─ y
-		//   │   ├─ f {b,i}
-		//   │   ├─ o {b,i}
-		//   │   ├─ o {b,i}
-		//   │   ├─ b
-		//   │   ├─ a
-		//   │   ├─ r
-		//   │   ├─ <img>    ---> modelImg
-		//   │   ├─ b {u}
-		//   │   ├─ o {u,sup}
-		//   │   └─ m {u}
-		//   ├─ z
-		//   └─ z
-		//
-		// Tree View:
-		//
-		// <div>                 ---> viewDiv
-		//   ├─ x                ---> viewTextX
-		//   ├─ <p>              ---> viewP
-		//   │   ├─ y            ---> viewTextY
-		//   │   ├─ <b>          ---> viewB
-		//   │   │   └─ <i>      ---> viewI
-		//   │   │       └─ foo  ---> viewTextFOO
-		//   │   ├─ bar          ---> viewTextBAR
-		//   │   ├─ <img>        ---> viewImg
-		//   │   └─ <u>          ---> viewU
-		//   │       ├─ b        ---> viewTextB
-		//   │       ├─ <sup>    ---> viewSup
-		//   │       │    └─ o   ---> viewTextO
-		//   │       └─ m        ---> viewTextM
-		//   └─ zz               ---> viewTextZZ
-
-		modelImg = new ModelElement( 'img' );
-		modelP = new ModelElement( 'p', {}, [
-			'y',
-			new ModelText( 'foo', { b: true, i: true } ),
-			'bar',
-			modelImg,
-			new ModelText( 'b', { u: true } ),
-			new ModelText( 'o', { u: true, sup: true } ),
-			new ModelText( 'm', { u: true } )
-		] );
-
-		modelDiv = new ModelRootElement();
-		modelDiv.appendChildren( [
-			'x',
-			modelP,
-			'zz'
-		] );
-
-		viewTextB = new ViewText( 'b' );
-		viewTextO = new ViewText( 'o' );
-		viewTextM = new ViewText( 'm' );
-		viewTextX = new ViewText( 'x' );
-		viewTextY = new ViewText( 'y' );
-		viewTextZZ = new ViewText( 'zz' );
-		viewTextFOO = new ViewText( 'foo' );
-		viewTextBAR = new ViewText( 'bar' );
-		viewImg = new ViewElement( 'img' );
-		viewSup = new ViewElement( 'sup', {}, [ viewTextO ] );
-		viewU = new ViewElement( 'u', {}, [ viewTextB, viewSup, viewTextM ] );
-		viewI = new ViewElement( 'i', {}, [ viewTextFOO ] );
-		viewB = new ViewElement( 'b', {}, [ viewI ] );
-		viewP = new ViewElement( 'p', {}, [ viewTextY, viewB, viewTextBAR, viewImg, viewU ] );
-		viewDiv = new ViewElement( 'div', {}, [ viewTextX, viewP, viewTextZZ ] );
-
-		mapper = new Mapper();
-		mapper.bindElements( modelP, viewP );
-		mapper.bindElements( modelDiv, viewDiv );
-		mapper.bindElements( modelImg, viewImg );
+	describe( 'clearBindings', () => {
+		it( 'should remove all mapping', () => {
+			const viewA = new ViewElement( 'a' );
+			const viewB = new ViewElement( 'b' );
+			const viewC = new ViewElement( 'c' );
+
+			const modelA = new ModelElement( 'a' );
+			const modelB = new ModelElement( 'b' );
+			const modelC = new ModelElement( 'c' );
+
+			const mapper = new Mapper();
+			mapper.bindElements( modelA, viewA );
+			mapper.bindElements( modelB, viewB );
+			mapper.bindElements( modelC, viewC );
+
+			expect( mapper.toModelElement( viewA ) ).to.equal( modelA );
+			expect( mapper.toModelElement( viewB ) ).to.equal( modelB );
+			expect( mapper.toModelElement( viewC ) ).to.equal( modelC );
+
+			expect( mapper.toViewElement( modelA ) ).to.equal( viewA );
+			expect( mapper.toViewElement( modelB ) ).to.equal( viewB );
+			expect( mapper.toViewElement( modelC ) ).to.equal( viewC );
+
+			mapper.clearBindings();
+
+			expect( mapper.toModelElement( viewA ) ).to.be.undefined;
+			expect( mapper.toModelElement( viewB ) ).to.be.undefined;
+			expect( mapper.toModelElement( viewC ) ).to.be.undefined;
+
+			expect( mapper.toViewElement( modelA ) ).to.be.undefined;
+			expect( mapper.toViewElement( modelB ) ).to.be.undefined;
+			expect( mapper.toViewElement( modelC ) ).to.be.undefined;
+		} );
 	} );
 
-	describe( 'toModelElement', () => {
-		it( 'should return corresponding model element', () => {
-			expect( mapper.toModelElement( viewP ) ).to.equal( modelP );
-			expect( mapper.toModelElement( viewDiv ) ).to.equal( modelDiv );
-			expect( mapper.toModelElement( viewImg ) ).to.equal( modelImg );
+	describe( 'Standard mapping', () => {
+		let modelDiv, modelP, modelImg;
+
+		let viewDiv, viewP, viewB, viewI, viewU, viewSup, viewImg;
+		let viewTextB, viewTextO, viewTextM, viewTextX, viewTextY, viewTextZZ, viewTextFOO, viewTextBAR;
+
+		let mapper;
+
+		before( () => {
+			// Tree Model:
+			//
+			// <div>             ---> modelDiv
+			//   ├─ x
+			//   ├─ <p>          ---> modelP
+			//   │   ├─ y
+			//   │   ├─ f {b,i}
+			//   │   ├─ o {b,i}
+			//   │   ├─ o {b,i}
+			//   │   ├─ b
+			//   │   ├─ a
+			//   │   ├─ r
+			//   │   ├─ <img>    ---> modelImg
+			//   │   ├─ b {u}
+			//   │   ├─ o {u,sup}
+			//   │   └─ m {u}
+			//   ├─ z
+			//   └─ z
+			//
+			// Tree View:
+			//
+			// <div>                 ---> viewDiv
+			//   ├─ x                ---> viewTextX
+			//   ├─ <p>              ---> viewP
+			//   │   ├─ y            ---> viewTextY
+			//   │   ├─ <b>          ---> viewB
+			//   │   │   └─ <i>      ---> viewI
+			//   │   │       └─ foo  ---> viewTextFOO
+			//   │   ├─ bar          ---> viewTextBAR
+			//   │   ├─ <img>        ---> viewImg
+			//   │   └─ <u>          ---> viewU
+			//   │       ├─ b        ---> viewTextB
+			//   │       ├─ <sup>    ---> viewSup
+			//   │       │    └─ o   ---> viewTextO
+			//   │       └─ m        ---> viewTextM
+			//   └─ zz               ---> viewTextZZ
+
+			modelImg = new ModelElement( 'img' );
+			modelP = new ModelElement( 'p', {}, [
+				'y',
+				new ModelText( 'foo', { b: true, i: true } ),
+				'bar',
+				modelImg,
+				new ModelText( 'b', { u: true } ),
+				new ModelText( 'o', { u: true, sup: true } ),
+				new ModelText( 'm', { u: true } )
+			] );
+
+			modelDiv = new ModelRootElement();
+			modelDiv.appendChildren( [
+				'x',
+				modelP,
+				'zz'
+			] );
+
+			viewTextB = new ViewText( 'b' );
+			viewTextO = new ViewText( 'o' );
+			viewTextM = new ViewText( 'm' );
+			viewTextX = new ViewText( 'x' );
+			viewTextY = new ViewText( 'y' );
+			viewTextZZ = new ViewText( 'zz' );
+			viewTextFOO = new ViewText( 'foo' );
+			viewTextBAR = new ViewText( 'bar' );
+			viewImg = new ViewElement( 'img' );
+			viewSup = new ViewElement( 'sup', {}, [ viewTextO ] );
+			viewU = new ViewElement( 'u', {}, [ viewTextB, viewSup, viewTextM ] );
+			viewI = new ViewElement( 'i', {}, [ viewTextFOO ] );
+			viewB = new ViewElement( 'b', {}, [ viewI ] );
+			viewP = new ViewElement( 'p', {}, [ viewTextY, viewB, viewTextBAR, viewImg, viewU ] );
+			viewDiv = new ViewElement( 'div', {}, [ viewTextX, viewP, viewTextZZ ] );
+
+			mapper = new Mapper();
+			mapper.bindElements( modelP, viewP );
+			mapper.bindElements( modelDiv, viewDiv );
+			mapper.bindElements( modelImg, viewImg );
 		} );
-	} );
 
-	describe( 'toViewElement', () => {
-		it( 'should return corresponding view element', () => {
-			expect( mapper.toViewElement( modelP ) ).to.equal( viewP );
-			expect( mapper.toViewElement( modelDiv ) ).to.equal( viewDiv );
-			expect( mapper.toViewElement( modelImg ) ).to.equal( viewImg );
+		describe( 'toModelElement', () => {
+			it( 'should return corresponding model element', () => {
+				expect( mapper.toModelElement( viewP ) ).to.equal( modelP );
+				expect( mapper.toModelElement( viewDiv ) ).to.equal( modelDiv );
+				expect( mapper.toModelElement( viewImg ) ).to.equal( modelImg );
+			} );
 		} );
-	} );
 
-	describe( 'toModelPosition', () => {
-		function createToModelTest( viewElement, viewOffset, modelElement, modelOffset ) {
-			const viewPosition = new ViewPosition( viewElement, viewOffset );
-			const modelPosition = mapper.toModelPosition( viewPosition );
-			expect( modelPosition.parent ).to.equal( modelElement );
-			expect( modelPosition.offset ).to.equal( modelOffset );
-		}
+		describe( 'toViewElement', () => {
+			it( 'should return corresponding view element', () => {
+				expect( mapper.toViewElement( modelP ) ).to.equal( viewP );
+				expect( mapper.toViewElement( modelDiv ) ).to.equal( viewDiv );
+				expect( mapper.toViewElement( modelImg ) ).to.equal( viewImg );
+			} );
+		} );
 
-		it( 'should transform viewDiv 0', () => createToModelTest( viewDiv, 0, modelDiv, 0 ) );
-		it( 'should transform viewDiv 1', () => createToModelTest( viewDiv, 1, modelDiv, 1 ) );
-		it( 'should transform viewDiv 2', () => createToModelTest( viewDiv, 2, modelDiv, 2 ) );
-		it( 'should transform viewDiv 3', () => createToModelTest( viewDiv, 3, modelDiv, 4 ) );
+		describe( 'toModelPosition', () => {
+			function createToModelTest( viewElement, viewOffset, modelElement, modelOffset ) {
+				const viewPosition = new ViewPosition( viewElement, viewOffset );
+				const modelPosition = mapper.toModelPosition( viewPosition );
+				expect( modelPosition.parent ).to.equal( modelElement );
+				expect( modelPosition.offset ).to.equal( modelOffset );
+			}
 
-		it( 'should transform viewTextX 0', () => createToModelTest( viewTextX, 0, modelDiv, 0 ) );
-		it( 'should transform viewTextX 1', () => createToModelTest( viewTextX, 1, modelDiv, 1 ) );
+			it( 'should transform viewDiv 0', () => createToModelTest( viewDiv, 0, modelDiv, 0 ) );
+			it( 'should transform viewDiv 1', () => createToModelTest( viewDiv, 1, modelDiv, 1 ) );
+			it( 'should transform viewDiv 2', () => createToModelTest( viewDiv, 2, modelDiv, 2 ) );
+			it( 'should transform viewDiv 3', () => createToModelTest( viewDiv, 3, modelDiv, 4 ) );
 
-		it( 'should transform viewP 0', () => createToModelTest( viewP, 0, modelP, 0 ) );
-		it( 'should transform viewP 1', () => createToModelTest( viewP, 1, modelP, 1 ) );
-		it( 'should transform viewP 2', () => createToModelTest( viewP, 2, modelP, 4 ) );
-		it( 'should transform viewP 3', () => createToModelTest( viewP, 3, modelP, 7 ) );
-		it( 'should transform viewP 4', () => createToModelTest( viewP, 4, modelP, 8 ) );
-		it( 'should transform viewP 5', () => createToModelTest( viewP, 5, modelP, 11 ) );
+			it( 'should transform viewTextX 0', () => createToModelTest( viewTextX, 0, modelDiv, 0 ) );
+			it( 'should transform viewTextX 1', () => createToModelTest( viewTextX, 1, modelDiv, 1 ) );
 
-		it( 'should transform viewTextY 0', () => createToModelTest( viewTextY, 0, modelP, 0 ) );
-		it( 'should transform viewTextY 1', () => createToModelTest( viewTextY, 1, modelP, 1 ) );
+			it( 'should transform viewP 0', () => createToModelTest( viewP, 0, modelP, 0 ) );
+			it( 'should transform viewP 1', () => createToModelTest( viewP, 1, modelP, 1 ) );
+			it( 'should transform viewP 2', () => createToModelTest( viewP, 2, modelP, 4 ) );
+			it( 'should transform viewP 3', () => createToModelTest( viewP, 3, modelP, 7 ) );
+			it( 'should transform viewP 4', () => createToModelTest( viewP, 4, modelP, 8 ) );
+			it( 'should transform viewP 5', () => createToModelTest( viewP, 5, modelP, 11 ) );
 
-		it( 'should transform viewB 0', () => createToModelTest( viewB, 0, modelP, 1 ) );
-		it( 'should transform viewB 1', () => createToModelTest( viewB, 1, modelP, 4 ) );
+			it( 'should transform viewTextY 0', () => createToModelTest( viewTextY, 0, modelP, 0 ) );
+			it( 'should transform viewTextY 1', () => createToModelTest( viewTextY, 1, modelP, 1 ) );
 
-		it( 'should transform viewI 0', () => createToModelTest( viewI, 0, modelP, 1 ) );
-		it( 'should transform viewI 1', () => createToModelTest( viewI, 1, modelP, 4 ) );
+			it( 'should transform viewB 0', () => createToModelTest( viewB, 0, modelP, 1 ) );
+			it( 'should transform viewB 1', () => createToModelTest( viewB, 1, modelP, 4 ) );
 
-		it( 'should transform viewTextFOO 0', () => createToModelTest( viewTextFOO, 0, modelP, 1 ) );
-		it( 'should transform viewTextFOO 1', () => createToModelTest( viewTextFOO, 1, modelP, 2 ) );
-		it( 'should transform viewTextFOO 2', () => createToModelTest( viewTextFOO, 2, modelP, 3 ) );
-		it( 'should transform viewTextFOO 3', () => createToModelTest( viewTextFOO, 3, modelP, 4 ) );
+			it( 'should transform viewI 0', () => createToModelTest( viewI, 0, modelP, 1 ) );
+			it( 'should transform viewI 1', () => createToModelTest( viewI, 1, modelP, 4 ) );
 
-		it( 'should transform viewTextBAR 0', () => createToModelTest( viewTextBAR, 0, modelP, 4 ) );
-		it( 'should transform viewTextBAR 1', () => createToModelTest( viewTextBAR, 1, modelP, 5 ) );
-		it( 'should transform viewTextBAR 2', () => createToModelTest( viewTextBAR, 2, modelP, 6 ) );
-		it( 'should transform viewTextBAR 3', () => createToModelTest( viewTextBAR, 3, modelP, 7 ) );
+			it( 'should transform viewTextFOO 0', () => createToModelTest( viewTextFOO, 0, modelP, 1 ) );
+			it( 'should transform viewTextFOO 1', () => createToModelTest( viewTextFOO, 1, modelP, 2 ) );
+			it( 'should transform viewTextFOO 2', () => createToModelTest( viewTextFOO, 2, modelP, 3 ) );
+			it( 'should transform viewTextFOO 3', () => createToModelTest( viewTextFOO, 3, modelP, 4 ) );
 
-		it( 'should transform viewU 0', () => createToModelTest( viewU, 0, modelP, 8 ) );
-		it( 'should transform viewU 1', () => createToModelTest( viewU, 1, modelP, 9 ) );
-		it( 'should transform viewU 2', () => createToModelTest( viewU, 2, modelP, 10 ) );
-		it( 'should transform viewU 3', () => createToModelTest( viewU, 3, modelP, 11 ) );
+			it( 'should transform viewTextBAR 0', () => createToModelTest( viewTextBAR, 0, modelP, 4 ) );
+			it( 'should transform viewTextBAR 1', () => createToModelTest( viewTextBAR, 1, modelP, 5 ) );
+			it( 'should transform viewTextBAR 2', () => createToModelTest( viewTextBAR, 2, modelP, 6 ) );
+			it( 'should transform viewTextBAR 3', () => createToModelTest( viewTextBAR, 3, modelP, 7 ) );
 
-		it( 'should transform viewTextB 0', () => createToModelTest( viewTextB, 0, modelP, 8 ) );
-		it( 'should transform viewTextB 1', () => createToModelTest( viewTextB, 1, modelP, 9 ) );
+			it( 'should transform viewU 0', () => createToModelTest( viewU, 0, modelP, 8 ) );
+			it( 'should transform viewU 1', () => createToModelTest( viewU, 1, modelP, 9 ) );
+			it( 'should transform viewU 2', () => createToModelTest( viewU, 2, modelP, 10 ) );
+			it( 'should transform viewU 3', () => createToModelTest( viewU, 3, modelP, 11 ) );
 
-		it( 'should transform viewSup 0', () => createToModelTest( viewSup, 0, modelP, 9 ) );
-		it( 'should transform viewSup 1', () => createToModelTest( viewSup, 1, modelP, 10 ) );
+			it( 'should transform viewTextB 0', () => createToModelTest( viewTextB, 0, modelP, 8 ) );
+			it( 'should transform viewTextB 1', () => createToModelTest( viewTextB, 1, modelP, 9 ) );
 
-		it( 'should transform viewTextO 0', () => createToModelTest( viewTextO, 0, modelP, 9 ) );
-		it( 'should transform viewTextO 1', () => createToModelTest( viewTextO, 1, modelP, 10 ) );
+			it( 'should transform viewSup 0', () => createToModelTest( viewSup, 0, modelP, 9 ) );
+			it( 'should transform viewSup 1', () => createToModelTest( viewSup, 1, modelP, 10 ) );
 
-		it( 'should transform viewTextM 0', () => createToModelTest( viewTextM, 0, modelP, 10 ) );
-		it( 'should transform viewTextM 1', () => createToModelTest( viewTextM, 1, modelP, 11 ) );
+			it( 'should transform viewTextO 0', () => createToModelTest( viewTextO, 0, modelP, 9 ) );
+			it( 'should transform viewTextO 1', () => createToModelTest( viewTextO, 1, modelP, 10 ) );
 
-		it( 'should transform viewTextZZ 0', () => createToModelTest( viewTextZZ, 0, modelDiv, 2 ) );
-		it( 'should transform viewTextZZ 1', () => createToModelTest( viewTextZZ, 1, modelDiv, 3 ) );
-		it( 'should transform viewTextZZ 2', () => createToModelTest( viewTextZZ, 2, modelDiv, 4 ) );
-	} );
+			it( 'should transform viewTextM 0', () => createToModelTest( viewTextM, 0, modelP, 10 ) );
+			it( 'should transform viewTextM 1', () => createToModelTest( viewTextM, 1, modelP, 11 ) );
 
-	describe( 'toViewPosition', () => {
-		function createToViewTest( modelElement, modelOffset, viewElement, viewOffset ) {
-			const modelPosition = ModelPosition.createFromParentAndOffset( modelElement, modelOffset );
-			const viewPosition = mapper.toViewPosition( modelPosition );
-			expect( viewPosition.parent ).to.equal( viewElement );
-			expect( viewPosition.offset ).to.equal( viewOffset );
-		}
-
-		it( 'should transform modelDiv 0', () => createToViewTest( modelDiv, 0, viewTextX, 0 ) );
-		it( 'should transform modelDiv 1', () => createToViewTest( modelDiv, 1, viewTextX, 1 ) );
-		it( 'should transform modelDiv 2', () => createToViewTest( modelDiv, 2, viewTextZZ, 0 ) );
-		it( 'should transform modelDiv 3', () => createToViewTest( modelDiv, 3, viewTextZZ, 1 ) );
-		it( 'should transform modelDiv 4', () => createToViewTest( modelDiv, 4, viewTextZZ, 2 ) );
-
-		it( 'should transform modelP 0', () => createToViewTest( modelP, 0, viewTextY, 0 ) );
-		it( 'should transform modelP 1', () => createToViewTest( modelP, 1, viewTextY, 1 ) );
-		it( 'should transform modelP 2', () => createToViewTest( modelP, 2, viewTextFOO, 1 ) );
-		it( 'should transform modelP 3', () => createToViewTest( modelP, 3, viewTextFOO, 2 ) );
-		it( 'should transform modelP 4', () => createToViewTest( modelP, 4, viewTextBAR, 0 ) );
-		it( 'should transform modelP 5', () => createToViewTest( modelP, 5, viewTextBAR, 1 ) );
-		it( 'should transform modelP 6', () => createToViewTest( modelP, 6, viewTextBAR, 2 ) );
-		it( 'should transform modelP 7', () => createToViewTest( modelP, 7, viewTextBAR, 3 ) );
-		it( 'should transform modelP 8', () => createToViewTest( modelP, 8, viewP, 4 ) );
-		it( 'should transform modelP 9', () => createToViewTest( modelP, 9, viewTextB, 1 ) );
-		it( 'should transform modelP 10', () => createToViewTest( modelP, 10, viewTextM, 0 ) );
-		it( 'should transform modelP 11', () => createToViewTest( modelP, 11, viewP, 5 ) );
-	} );
+			it( 'should transform viewTextZZ 0', () => createToModelTest( viewTextZZ, 0, modelDiv, 2 ) );
+			it( 'should transform viewTextZZ 1', () => createToModelTest( viewTextZZ, 1, modelDiv, 3 ) );
+			it( 'should transform viewTextZZ 2', () => createToModelTest( viewTextZZ, 2, modelDiv, 4 ) );
+		} );
 
-	describe( 'toModelRange', () => {
-		it( 'should transform range', () => {
-			const viewRange = ViewRange.createFromParentsAndOffsets( viewDiv, 0, viewTextFOO, 2 );
-			const modelRange = mapper.toModelRange( viewRange );
-			expect( modelRange.start.parent ).to.equal( modelDiv );
-			expect( modelRange.start.offset ).to.equal( 0 );
-			expect( modelRange.end.parent ).to.equal( modelP );
-			expect( modelRange.end.offset ).to.equal( 3 );
+		describe( 'toViewPosition', () => {
+			function createToViewTest( modelElement, modelOffset, viewElement, viewOffset ) {
+				const modelPosition = ModelPosition.createFromParentAndOffset( modelElement, modelOffset );
+				const viewPosition = mapper.toViewPosition( modelPosition );
+				expect( viewPosition.parent ).to.equal( viewElement );
+				expect( viewPosition.offset ).to.equal( viewOffset );
+			}
+
+			it( 'should transform modelDiv 0', () => createToViewTest( modelDiv, 0, viewTextX, 0 ) );
+			it( 'should transform modelDiv 1', () => createToViewTest( modelDiv, 1, viewTextX, 1 ) );
+			it( 'should transform modelDiv 2', () => createToViewTest( modelDiv, 2, viewTextZZ, 0 ) );
+			it( 'should transform modelDiv 3', () => createToViewTest( modelDiv, 3, viewTextZZ, 1 ) );
+			it( 'should transform modelDiv 4', () => createToViewTest( modelDiv, 4, viewTextZZ, 2 ) );
+
+			it( 'should transform modelP 0', () => createToViewTest( modelP, 0, viewTextY, 0 ) );
+			it( 'should transform modelP 1', () => createToViewTest( modelP, 1, viewTextY, 1 ) );
+			it( 'should transform modelP 2', () => createToViewTest( modelP, 2, viewTextFOO, 1 ) );
+			it( 'should transform modelP 3', () => createToViewTest( modelP, 3, viewTextFOO, 2 ) );
+			it( 'should transform modelP 4', () => createToViewTest( modelP, 4, viewTextBAR, 0 ) );
+			it( 'should transform modelP 5', () => createToViewTest( modelP, 5, viewTextBAR, 1 ) );
+			it( 'should transform modelP 6', () => createToViewTest( modelP, 6, viewTextBAR, 2 ) );
+			it( 'should transform modelP 7', () => createToViewTest( modelP, 7, viewTextBAR, 3 ) );
+			it( 'should transform modelP 8', () => createToViewTest( modelP, 8, viewP, 4 ) );
+			it( 'should transform modelP 9', () => createToViewTest( modelP, 9, viewTextB, 1 ) );
+			it( 'should transform modelP 10', () => createToViewTest( modelP, 10, viewTextM, 0 ) );
+			it( 'should transform modelP 11', () => createToViewTest( modelP, 11, viewP, 5 ) );
 		} );
-	} );
 
-	describe( 'toViewRange', () => {
-		it( 'should transform range', () => {
-			const modelRange = ModelRange.createFromParentsAndOffsets( modelDiv, 0, modelP, 3 );
-			const viewRange = mapper.toViewRange( modelRange );
-			expect( viewRange.start.parent ).to.equal( viewTextX );
-			expect( viewRange.start.offset ).to.equal( 0 );
-			expect( viewRange.end.parent ).to.equal( viewTextFOO );
-			expect( viewRange.end.offset ).to.equal( 2 );
+		describe( 'toModelRange', () => {
+			it( 'should transform range', () => {
+				const viewRange = ViewRange.createFromParentsAndOffsets( viewDiv, 0, viewTextFOO, 2 );
+				const modelRange = mapper.toModelRange( viewRange );
+				expect( modelRange.start.parent ).to.equal( modelDiv );
+				expect( modelRange.start.offset ).to.equal( 0 );
+				expect( modelRange.end.parent ).to.equal( modelP );
+				expect( modelRange.end.offset ).to.equal( 3 );
+			} );
 		} );
-	} );
-} );
 
-describe( 'Mapper for widget', () => {
-	let modelDiv, modelWidget, modelImg, modelCaption;
-
-	let viewDiv, viewWidget, viewMask, viewWrapper, viewImg, viewCaption;
-	let viewTextX, viewTextFOO, viewTextZZ, viewTextLABEL;
-
-	let mapper;
-
-	before( () => {
-		// Tree Model:
-		//
-		// <div>                 ---> modelDiv
-		//   ├─ x
-		//   ├─ <widget>         ---> modelWidget
-		//   │   ├─ <img>        ---> modelImg
-		//   │   └─ <caption>    ---> modelCaption
-		//   │       ├─ f
-		//   │       ├─ o
-		//   │       └─ o
-		//   ├─ z
-		//   └─ z
-		//
-		// Tree View:
-		//
-		// <div>                     ---> viewDiv
-		//   ├─ x                    ---> viewTextX
-		//   ├─ <widget>             ---> viewWidget
-		//   │   ├─ <mask>           ---> viewMask
-		//   │   │   └─ label        ---> viewTextLABEL
-		//   │   └─ <wrapper>        ---> viewWrapper
-		//   │       ├─ <img>        ---> viewImg
-		//   │       └─ <caption>    ---> viewCaption
-		//   │           └─ foo      ---> viewTextFOO
-		//   └─ zz                   ---> viewTextZZ
-
-		modelImg = new ModelElement( 'img' );
-		modelCaption = new ModelElement( 'caption', {}, 'foo' );
-		modelWidget = new ModelElement( 'widget', {}, [ modelImg, modelCaption ] );
-		modelDiv = new ModelRootElement();
-		modelDiv.appendChildren( [ 'x', modelWidget, 'zz' ] );
-
-		viewTextX = new ViewText( 'y' );
-		viewTextZZ = new ViewText( 'zz' );
-		viewTextFOO = new ViewText( 'foo' );
-		viewTextLABEL = new ViewText( 'label' );
-
-		viewImg = new ViewElement( 'img' );
-		viewMask = new ViewElement( 'mask', {}, [ viewTextLABEL ] );
-		viewCaption = new ViewElement( 'caption', {}, [ viewTextFOO ] );
-		viewWrapper = new ViewElement( 'wrapper', {}, [ viewImg, viewCaption ] );
-		viewWidget = new ViewElement( 'widget', [ viewMask, viewWrapper ] );
-		viewDiv = new ViewElement( 'div', {}, [ viewTextX, viewWidget, viewTextZZ ] );
-
-		mapper = new Mapper();
-		mapper.bindElements( modelDiv, viewDiv );
-		mapper.bindElements( modelWidget, viewWidget );
-		mapper.bindElements( modelImg, viewImg );
-		mapper.bindElements( modelCaption, viewCaption );
+		describe( 'toViewRange', () => {
+			it( 'should transform range', () => {
+				const modelRange = ModelRange.createFromParentsAndOffsets( modelDiv, 0, modelP, 3 );
+				const viewRange = mapper.toViewRange( modelRange );
+				expect( viewRange.start.parent ).to.equal( viewTextX );
+				expect( viewRange.start.offset ).to.equal( 0 );
+				expect( viewRange.end.parent ).to.equal( viewTextFOO );
+				expect( viewRange.end.offset ).to.equal( 2 );
+			} );
+		} );
 	} );
 
-	describe( 'toModelElement', () => {
-		it( 'should return corresponding model element', () => {
-			expect( mapper.toModelElement( viewDiv ) ).to.equal( modelDiv );
-			expect( mapper.toModelElement( viewWidget ) ).to.equal( modelWidget );
-			expect( mapper.toModelElement( viewImg ) ).to.equal( modelImg );
-			expect( mapper.toModelElement( viewCaption ) ).to.equal( modelCaption );
+	describe( 'Widget mapping', () => {
+		let modelDiv, modelWidget, modelImg, modelCaption;
+
+		let viewDiv, viewWidget, viewMask, viewWrapper, viewImg, viewCaption;
+		let viewTextX, viewTextFOO, viewTextZZ, viewTextLABEL;
+
+		let mapper;
+
+		before( () => {
+			// Tree Model:
+			//
+			// <div>                 ---> modelDiv
+			//   ├─ x
+			//   ├─ <widget>         ---> modelWidget
+			//   │   ├─ <img>        ---> modelImg
+			//   │   └─ <caption>    ---> modelCaption
+			//   │       ├─ f
+			//   │       ├─ o
+			//   │       └─ o
+			//   ├─ z
+			//   └─ z
+			//
+			// Tree View:
+			//
+			// <div>                     ---> viewDiv
+			//   ├─ x                    ---> viewTextX
+			//   ├─ <widget>             ---> viewWidget
+			//   │   ├─ <mask>           ---> viewMask
+			//   │   │   └─ label        ---> viewTextLABEL
+			//   │   └─ <wrapper>        ---> viewWrapper
+			//   │       ├─ <img>        ---> viewImg
+			//   │       └─ <caption>    ---> viewCaption
+			//   │           └─ foo      ---> viewTextFOO
+			//   └─ zz                   ---> viewTextZZ
+
+			modelImg = new ModelElement( 'img' );
+			modelCaption = new ModelElement( 'caption', {}, 'foo' );
+			modelWidget = new ModelElement( 'widget', {}, [ modelImg, modelCaption ] );
+			modelDiv = new ModelRootElement();
+			modelDiv.appendChildren( [ 'x', modelWidget, 'zz' ] );
+
+			viewTextX = new ViewText( 'y' );
+			viewTextZZ = new ViewText( 'zz' );
+			viewTextFOO = new ViewText( 'foo' );
+			viewTextLABEL = new ViewText( 'label' );
+
+			viewImg = new ViewElement( 'img' );
+			viewMask = new ViewElement( 'mask', {}, [ viewTextLABEL ] );
+			viewCaption = new ViewElement( 'caption', {}, [ viewTextFOO ] );
+			viewWrapper = new ViewElement( 'wrapper', {}, [ viewImg, viewCaption ] );
+			viewWidget = new ViewElement( 'widget', [ viewMask, viewWrapper ] );
+			viewDiv = new ViewElement( 'div', {}, [ viewTextX, viewWidget, viewTextZZ ] );
+
+			mapper = new Mapper();
+			mapper.bindElements( modelDiv, viewDiv );
+			mapper.bindElements( modelWidget, viewWidget );
+			mapper.bindElements( modelImg, viewImg );
+			mapper.bindElements( modelCaption, viewCaption );
 		} );
-	} );
 
-	describe( 'toViewElement', () => {
-		it( 'should return corresponding view element', () => {
-			expect( mapper.toViewElement( modelDiv ) ).to.equal( viewDiv );
-			expect( mapper.toViewElement( modelWidget ) ).to.equal( viewWidget );
-			expect( mapper.toViewElement( modelImg ) ).to.equal( viewImg );
-			expect( mapper.toViewElement( modelCaption ) ).to.equal( viewCaption );
+		describe( 'toModelElement', () => {
+			it( 'should return corresponding model element', () => {
+				expect( mapper.toModelElement( viewDiv ) ).to.equal( modelDiv );
+				expect( mapper.toModelElement( viewWidget ) ).to.equal( modelWidget );
+				expect( mapper.toModelElement( viewImg ) ).to.equal( modelImg );
+				expect( mapper.toModelElement( viewCaption ) ).to.equal( modelCaption );
+			} );
 		} );
-	} );
 
-	describe( 'toModelPosition', () => {
-		function createToModelTest( viewElement, viewOffset, modelElement, modelOffset ) {
-			const viewPosition = new ViewPosition( viewElement, viewOffset );
-			const modelPosition = mapper.toModelPosition( viewPosition );
-			expect( modelPosition.parent ).to.equal( modelElement );
-			expect( modelPosition.offset ).to.equal( modelOffset );
-		}
+		describe( 'toViewElement', () => {
+			it( 'should return corresponding view element', () => {
+				expect( mapper.toViewElement( modelDiv ) ).to.equal( viewDiv );
+				expect( mapper.toViewElement( modelWidget ) ).to.equal( viewWidget );
+				expect( mapper.toViewElement( modelImg ) ).to.equal( viewImg );
+				expect( mapper.toViewElement( modelCaption ) ).to.equal( viewCaption );
+			} );
+		} );
 
-		it( 'should transform viewDiv 0', () => createToModelTest( viewDiv, 0, modelDiv, 0 ) );
-		it( 'should transform viewDiv 1', () => createToModelTest( viewDiv, 1, modelDiv, 1 ) );
-		it( 'should transform viewDiv 2', () => createToModelTest( viewDiv, 2, modelDiv, 2 ) );
-		it( 'should transform viewDiv 3', () => createToModelTest( viewDiv, 3, modelDiv, 4 ) );
+		describe( 'toModelPosition', () => {
+			function createToModelTest( viewElement, viewOffset, modelElement, modelOffset ) {
+				const viewPosition = new ViewPosition( viewElement, viewOffset );
+				const modelPosition = mapper.toModelPosition( viewPosition );
+				expect( modelPosition.parent ).to.equal( modelElement );
+				expect( modelPosition.offset ).to.equal( modelOffset );
+			}
 
-		it( 'should transform viewTextX 0', () => createToModelTest( viewTextX, 0, modelDiv, 0 ) );
-		it( 'should transform viewTextX 1', () => createToModelTest( viewTextX, 1, modelDiv, 1 ) );
+			it( 'should transform viewDiv 0', () => createToModelTest( viewDiv, 0, modelDiv, 0 ) );
+			it( 'should transform viewDiv 1', () => createToModelTest( viewDiv, 1, modelDiv, 1 ) );
+			it( 'should transform viewDiv 2', () => createToModelTest( viewDiv, 2, modelDiv, 2 ) );
+			it( 'should transform viewDiv 3', () => createToModelTest( viewDiv, 3, modelDiv, 4 ) );
 
-		it( 'should transform viewTextZZ 0', () => createToModelTest( viewTextZZ, 0, modelDiv, 2 ) );
-		it( 'should transform viewTextZZ 1', () => createToModelTest( viewTextZZ, 1, modelDiv, 3 ) );
-		it( 'should transform viewTextZZ 2', () => createToModelTest( viewTextZZ, 2, modelDiv, 4 ) );
+			it( 'should transform viewTextX 0', () => createToModelTest( viewTextX, 0, modelDiv, 0 ) );
+			it( 'should transform viewTextX 1', () => createToModelTest( viewTextX, 1, modelDiv, 1 ) );
 
-		it( 'should transform viewImg 0', () => createToModelTest( viewImg, 0, modelImg, 0 ) );
+			it( 'should transform viewTextZZ 0', () => createToModelTest( viewTextZZ, 0, modelDiv, 2 ) );
+			it( 'should transform viewTextZZ 1', () => createToModelTest( viewTextZZ, 1, modelDiv, 3 ) );
+			it( 'should transform viewTextZZ 2', () => createToModelTest( viewTextZZ, 2, modelDiv, 4 ) );
 
-		it( 'should transform viewCaption 0', () => createToModelTest( viewCaption, 0, modelCaption, 0 ) );
-		it( 'should transform viewCaption 1', () => createToModelTest( viewCaption, 1, modelCaption, 3 ) );
+			it( 'should transform viewImg 0', () => createToModelTest( viewImg, 0, modelImg, 0 ) );
 
-		it( 'should transform viewTextFOO 0', () => createToModelTest( viewTextFOO, 0, modelCaption, 0 ) );
-		it( 'should transform viewTextFOO 1', () => createToModelTest( viewTextFOO, 1, modelCaption, 1 ) );
-		it( 'should transform viewTextFOO 2', () => createToModelTest( viewTextFOO, 2, modelCaption, 2 ) );
-		it( 'should transform viewTextFOO 3', () => createToModelTest( viewTextFOO, 3, modelCaption, 3 ) );
-	} );
+			it( 'should transform viewCaption 0', () => createToModelTest( viewCaption, 0, modelCaption, 0 ) );
+			it( 'should transform viewCaption 1', () => createToModelTest( viewCaption, 1, modelCaption, 3 ) );
+
+			it( 'should transform viewTextFOO 0', () => createToModelTest( viewTextFOO, 0, modelCaption, 0 ) );
+			it( 'should transform viewTextFOO 1', () => createToModelTest( viewTextFOO, 1, modelCaption, 1 ) );
+			it( 'should transform viewTextFOO 2', () => createToModelTest( viewTextFOO, 2, modelCaption, 2 ) );
+			it( 'should transform viewTextFOO 3', () => createToModelTest( viewTextFOO, 3, modelCaption, 3 ) );
+		} );
 
-	describe( 'toViewPosition', () => {
-		function createToViewTest( modelElement, modelOffset, viewElement, viewOffset ) {
-			const modelPosition = ModelPosition.createFromParentAndOffset( modelElement, modelOffset );
-			const viewPosition = mapper.toViewPosition( modelPosition );
-			expect( viewPosition.parent ).to.equal( viewElement );
-			expect( viewPosition.offset ).to.equal( viewOffset );
-		}
-
-		it( 'should transform modelDiv 0', () => createToViewTest( modelDiv, 0, viewTextX, 0 ) );
-		it( 'should transform modelDiv 1', () => createToViewTest( modelDiv, 1, viewTextX, 1 ) );
-		it( 'should transform modelDiv 2', () => createToViewTest( modelDiv, 2, viewTextZZ, 0 ) );
-		it( 'should transform modelDiv 3', () => createToViewTest( modelDiv, 3, viewTextZZ, 1 ) );
-		it( 'should transform modelDiv 4', () => createToViewTest( modelDiv, 4, viewTextZZ, 2 ) );
-
-		it( 'should transform modelImg 0', () => createToViewTest( modelImg, 0, viewImg, 0 ) );
-
-		it( 'should transform modelCaption 0', () => createToViewTest( modelCaption, 0, viewTextFOO, 0 ) );
-		it( 'should transform modelCaption 1', () => createToViewTest( modelCaption, 1, viewTextFOO, 1 ) );
-		it( 'should transform modelCaption 2', () => createToViewTest( modelCaption, 2, viewTextFOO, 2 ) );
-		it( 'should transform modelCaption 3', () => createToViewTest( modelCaption, 3, viewTextFOO, 3 ) );
+		describe( 'toViewPosition', () => {
+			function createToViewTest( modelElement, modelOffset, viewElement, viewOffset ) {
+				const modelPosition = ModelPosition.createFromParentAndOffset( modelElement, modelOffset );
+				const viewPosition = mapper.toViewPosition( modelPosition );
+				expect( viewPosition.parent ).to.equal( viewElement );
+				expect( viewPosition.offset ).to.equal( viewOffset );
+			}
+
+			it( 'should transform modelDiv 0', () => createToViewTest( modelDiv, 0, viewTextX, 0 ) );
+			it( 'should transform modelDiv 1', () => createToViewTest( modelDiv, 1, viewTextX, 1 ) );
+			it( 'should transform modelDiv 2', () => createToViewTest( modelDiv, 2, viewTextZZ, 0 ) );
+			it( 'should transform modelDiv 3', () => createToViewTest( modelDiv, 3, viewTextZZ, 1 ) );
+			it( 'should transform modelDiv 4', () => createToViewTest( modelDiv, 4, viewTextZZ, 2 ) );
+
+			it( 'should transform modelImg 0', () => createToViewTest( modelImg, 0, viewImg, 0 ) );
+
+			it( 'should transform modelCaption 0', () => createToViewTest( modelCaption, 0, viewTextFOO, 0 ) );
+			it( 'should transform modelCaption 1', () => createToViewTest( modelCaption, 1, viewTextFOO, 1 ) );
+			it( 'should transform modelCaption 2', () => createToViewTest( modelCaption, 2, viewTextFOO, 2 ) );
+			it( 'should transform modelCaption 3', () => createToViewTest( modelCaption, 3, viewTextFOO, 3 ) );
+		} );
 	} );
 } );

+ 189 - 0
packages/ckeditor5-engine/tests/datacontroller.js

@@ -0,0 +1,189 @@
+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md.
+ */
+
+/* bender-tags: view */
+
+'use strict';
+
+import ModelDocument from '/ckeditor5/engine/model/document.js';
+import DataController from '/ckeditor5/engine/datacontroller.js';
+import HtmlDataProcessor from '/ckeditor5/engine/dataprocessor/HtmlDataProcessor.js';
+
+import BuildViewConverterFor  from '/ckeditor5/engine/conversion/view-converter-builder.js';
+import BuildModelConverterFor  from '/ckeditor5/engine/conversion/model-converter-builder.js';
+
+import { getData, setData, stringify } from '/tests/engine/_utils/model.js';
+
+import count from '/ckeditor5/utils/count.js';
+
+describe( 'DataController', () => {
+	let modelDocument, htmlDataProcessor, data, schema;
+
+	beforeEach( () => {
+		modelDocument = new ModelDocument();
+		modelDocument.createRoot( 'main' );
+		modelDocument.createRoot( 'title' );
+
+		htmlDataProcessor = new HtmlDataProcessor();
+
+		data = new DataController( modelDocument, htmlDataProcessor );
+
+		schema = modelDocument.schema;
+	} );
+
+	describe( 'parse', () => {
+		it( 'should set text', () => {
+			schema.allow( { name: '$text', inside: '$root' } );
+			const model = data.parse( '<p>foo<b>bar</b></p>' );
+
+			expect( stringify( model ) ).to.equal( 'foobar' );
+		} );
+
+		it( 'should set paragraph', () => {
+			schema.registerItem( 'paragraph', '$block' );
+
+			BuildViewConverterFor( data.viewToModel ).fromElement( 'p' ).toElement( 'paragraph' );
+
+			const model = data.parse( '<p>foo<b>bar</b></p>' );
+
+			expect( stringify( model ) ).to.equal( '<paragraph>foobar</paragraph>' );
+		} );
+
+		it( 'should set two paragraphs', () => {
+			schema.registerItem( 'paragraph', '$block' );
+
+			BuildViewConverterFor( data.viewToModel ).fromElement( 'p' ).toElement( 'paragraph' );
+
+			const model = data.parse( '<p>foo</p><p>bar</p>' );
+
+			expect( stringify( model ) ).to.equal(
+				'<paragraph>foo</paragraph><paragraph>bar</paragraph>' );
+		} );
+
+		it( 'should set paragraphs with bold', () => {
+			schema.registerItem( 'paragraph', '$block' );
+			schema.allow( { name: '$text', attributes: [ 'bold' ], inside: '$block' } );
+
+			BuildViewConverterFor( data.viewToModel ).fromElement( 'p' ).toElement( 'paragraph' );
+			BuildViewConverterFor( data.viewToModel ).fromElement( 'b' ).toAttribute( 'bold', true );
+
+			const model = data.parse( '<p>foo<b>bar</b></p>' );
+
+			expect( stringify( model ) ).to.equal(
+				'<paragraph>foo<$text bold=true>bar</$text></paragraph>' );
+		} );
+	} );
+
+	describe( 'set', () => {
+		it( 'should set data to root', () => {
+			schema.allow( { name: '$text', inside: '$root' } );
+			data.set( 'foo' );
+
+			expect( getData( modelDocument, { withoutSelection: true } ) ).to.equal( 'foo' );
+		} );
+
+		it( 'should create a batch', () => {
+			schema.allow( { name: '$text', inside: '$root' } );
+			data.set( 'foo' );
+
+			expect( count( modelDocument.history.getDeltas() ) ).to.equal( 1 );
+		} );
+
+		it( 'should get root name as a parameter', () => {
+			schema.allow( { name: '$text', inside: '$root' } );
+			data.set( 'foo', 'main' );
+			data.set( 'Bar', 'title' );
+
+			expect( getData( modelDocument, { withoutSelection: true, rootName: 'main' } ) ).to.equal( 'foo' );
+			expect( getData( modelDocument, { withoutSelection: true, rootName: 'title' } ) ).to.equal( 'Bar' );
+
+			expect( count( modelDocument.history.getDeltas() ) ).to.equal( 2 );
+		} );
+
+		// This case was added when order of params was different and it really didn't work. Let's keep it
+		// if anyone will ever try to change this.
+		it( 'should allow setting empty data', () => {
+			schema.allow( { name: '$text', inside: '$root' } );
+
+			data.set( 'foo', 'title' );
+
+			expect( getData( modelDocument, { withoutSelection: true, rootName: 'title' } ) ).to.equal( 'foo' );
+
+			data.set( '', 'title' );
+
+			expect( getData( modelDocument, { withoutSelection: true, rootName: 'title' } ) ).to.equal( '' );
+		} );
+	} );
+
+	describe( 'get', () => {
+		it( 'should get paragraph with text', () => {
+			setData( modelDocument, '<paragraph>foo</paragraph>' );
+
+			BuildModelConverterFor( data.modelToView ).fromElement( 'paragraph' ).toElement( 'p' );
+
+			expect( data.get() ).to.equal( '<p>foo</p>' );
+		} );
+
+		it( 'should get empty paragraph', () => {
+			setData( modelDocument, '<paragraph></paragraph>' );
+
+			BuildModelConverterFor( data.modelToView ).fromElement( 'paragraph' ).toElement( 'p' );
+
+			expect( data.get() ).to.equal( '<p>&nbsp;</p>' );
+		} );
+
+		it( 'should get two paragraphs', () => {
+			setData( modelDocument, '<paragraph>foo</paragraph><paragraph>bar</paragraph>' );
+
+			BuildModelConverterFor( data.modelToView ).fromElement( 'paragraph' ).toElement( 'p' );
+
+			expect( data.get() ).to.equal( '<p>foo</p><p>bar</p>' );
+		} );
+
+		it( 'should get text directly in root', () => {
+			setData( modelDocument, 'foo' );
+
+			expect( data.get() ).to.equal( 'foo' );
+		} );
+
+		it( 'should get paragraphs without bold', () => {
+			setData( modelDocument, '<paragraph>foo<$text bold=true>bar</$text></paragraph>' );
+
+			BuildModelConverterFor( data.modelToView ).fromElement( 'paragraph' ).toElement( 'p' );
+
+			expect( data.get() ).to.equal( '<p>foobar</p>' );
+		} );
+
+		it( 'should get paragraphs with bold', () => {
+			setData( modelDocument, '<paragraph>foo<$text bold=true>bar</$text></paragraph>' );
+
+			BuildModelConverterFor( data.modelToView ).fromElement( 'paragraph' ).toElement( 'p' );
+			BuildModelConverterFor( data.modelToView ).fromAttribute( 'bold' ).toElement( 'b' );
+
+			expect( data.get() ).to.equal( '<p>foo<b>bar</b></p>' );
+		} );
+
+		it( 'should get root name as a parameter', () => {
+			setData( modelDocument, '<paragraph>foo</paragraph>', { rootName: 'main' } );
+			setData( modelDocument, 'Bar', { rootName: 'title' } );
+
+			BuildModelConverterFor( data.modelToView ).fromElement( 'paragraph' ).toElement( 'p' );
+			BuildModelConverterFor( data.modelToView ).fromAttribute( 'bold' ).toElement( 'b' );
+
+			expect( data.get() ).to.equal( '<p>foo</p>' );
+			expect( data.get( 'main' ) ).to.equal( '<p>foo</p>' );
+			expect( data.get( 'title' ) ).to.equal( 'Bar' );
+		} );
+	} );
+
+	describe( 'destroy', () => {
+		it( 'should be there for you', () => {
+			// Should not throw.
+			data.destroy();
+
+			expect( data ).to.respondTo( 'destroy' );
+		} );
+	} );
+} );