/**
* @license Copyright (c) 2003-2016, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md.
*/
/**
* @module engine/controller/datacontroller
*/
import mix from '../../utils/mix.js';
import EmitterMixin from '../../utils/emittermixin.js';
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 ViewDocumentFragment from '../view/documentfragment.js';
import ModelRange from '../model/range.js';
import ModelPosition from '../model/position.js';
import insertContent from './insertcontent.js';
import deleteContent from './deletecontent.js';
import modifySelection from './modifyselection.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 #get get}
* and {@link #set set} data of the {@link #model model}
* using given:
*
* * {@link module:engine/dataProcessor.DataProcessor data processor},
* * {@link module:engine/conversion/modelconversiondispatcher~ModelConversionDispatcher model to view} and
* * {@link module:engine/conversion/viewconversiondispatcher~ViewConversionDispatcher view to model} converters.
*
* @mixes module:utils/emittermixin~EmitterMixin
*/
export default class DataController {
/**
* Creates data controller instance.
*
* @param {module:engine/model/document~Document} model Document model.
* @param {module:engine/dataProcessor~DataProcessor} [dataProcessor] Data processor which should used by the controller.
*/
constructor( model, dataProcessor ) {
/**
* Document model.
*
* @readonly
* @member {module:engine/model/document}
*/
this.model = model;
/**
* Data processor used during the conversion.
*
* @readonly
* @member {engine.dataProcessor.DataProcessor}
*/
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.
*
* @member {engine.conversion.Mapper}
*/
this.mapper = new Mapper();
/**
* Model to view conversion dispatcher used by the {@link #get get method}.
* To attach model to view converter to the data pipeline you need to add lister to this property:
*
* data.modelToView( 'insert:$element', customInsertConverter );
*
* Or use {@link engine.conversion.ModelConverterBuilder}:
*
* buildModelConverter().for( data.modelToView ).fromAttribute( 'bold' ).toElement( 'b' );
*
* @readonly
* @member {engine.conversion.ModelConversionDispatcher}
*/
this.modelToView = new ModelConversionDispatcher( {
mapper: this.mapper
} );
this.modelToView.on( 'insert:$text', insertText(), { priority: 'lowest' } );
/**
* View to model conversion dispatcher used by the {@link #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}:
*
* buildViewConverter().for( data.viewToModel ).fromElement( 'b' ).toAttribute( 'bold', 'true' );
*
* @readonly
* @member {engine.conversion.ViewConversionDispatcher}
*/
this.viewToModel = new ViewConversionDispatcher( {
schema: model.schema
} );
// Define default converters for text and elements.
//
// Note that if there is no default converter for the element it will be skipped, for instance `foo` will be
// converted to nothing. We add `convertToModelFragment` as a last converter so it converts children of that
// element to the document fragment so `foo` will be converted to `foo` if there is no converter for ``.
this.viewToModel.on( 'text', convertText(), { priority: 'lowest' } );
this.viewToModel.on( 'element', convertToModelFragment(), { priority: 'lowest' } );
this.viewToModel.on( 'documentFragment', convertToModelFragment(), { priority: 'lowest' } );
this.on( 'insertContent', ( evt, data ) => insertContent( this, data.content, data.selection, data.batch ) );
this.on( 'deleteContent', ( evt, data ) => deleteContent( data.selection, data.batch, data.options ) );
this.on( 'modifySelection', ( evt, data ) => modifySelection( data.selection, data.options ) );
}
/**
* Returns model's data converted by the {@link #modelToView model to view converters} and
* formatted by the {@link #processor data processor}.
*
* @param {String} [rootName='main'] Root name.
* @returns {String} Output data.
*/
get( rootName = 'main' ) {
// Get model range.
return this.stringify( this.model.getRoot( rootName ) );
}
/**
* Returns the content of the given {@link module:engine/model/Element model's element} converted by the
* {@link #modelToView model to view converters} and formatted by the
* {@link #processor data processor}.
*
* @param {module:engine/model/Element} modelElement Element which content will be stringified.
* @returns {String} Output data.
*/
stringify( modelElement ) {
// model -> view
const viewDocumentFragment = this.toView( modelElement );
// view -> data
return this.processor.toData( viewDocumentFragment );
}
/**
* Returns the content of the given {@link module:engine/model/Element model's element} converted by the
* {@link #modelToView model to view converters} to the
* {@link engine.view.DocumentFragment view DocumentFragment}.
*
* @param {module:engine/model/Element} modelElement Element which content will be stringified.
* @returns {engine.view.DocumentFragment} Output view DocumentFragment.
*/
toView( modelElement ) {
const modelRange = ModelRange.createIn( modelElement );
const viewDocumentFragment = new ViewDocumentFragment();
this.mapper.bindElements( modelElement, viewDocumentFragment );
this.modelToView.convertInsertion( modelRange );
this.mapper.clearBindings();
return viewDocumentFragment;
}
/**
* Sets input data parsed by the {@link #processor data processor} and
* converted by the {@link #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 #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.enqueueChanges( () => {
// Clearing selection is a workaround for ticket #569 (LiveRange loses position after removing data from document).
// After fixing it this code should be removed.
this.model.selection.removeAllRanges();
this.model.selection.clearAttributes();
// Initial batch should be ignored by features like undo, etc.
this.model.batch( 'transparent' )
.remove( ModelRange.createIn( modelRoot ) )
.insert( ModelPosition.createAt( modelRoot, 0 ), this.parse( data ) );
} );
}
/**
* Returns data parsed by the {@link #processor data processor} and then
* converted by the {@link #viewToModel view to model converters}.
*
* @see #set
* @param {String} data Data to parse.
* @param {String} [context='$root'] Base context in which view will be converted to the model. See:
* {@link engine.conversion.ViewConversionDispatcher#convert}.
* @returns {module:engine/model/DocumentFragment} Parsed data.
*/
parse( data, context = '$root' ) {
// data -> view
const viewDocumentFragment = this.processor.toView( data );
// view -> model
return this.viewToModel.convert( viewDocumentFragment, { context: [ context ] } );
}
/**
* Removes all event listeners set by the DataController.
*/
destroy() {}
/**
* See {@link engine.controller.insertContent}.
*
* @fires insertContent
* @param {module:engine/model/DocumentFragment} content The content to insert.
* @param {module:engine/model/Selection} selection Selection into which the content should be inserted.
* @param {module:engine/model/Batch} [batch] Batch to which deltas will be added. If not specified, then
* changes will be added to a new batch.
*/
insertContent( content, selection, batch ) {
this.fire( 'insertContent', { content, selection, batch } );
}
/**
* See {@link engine.controller.deleteContent}.
*
* Note: For the sake of predictability, the resulting selection should always be collapsed.
* In cases where a feature wants to modify deleting behavior so selection isn't collapsed
* (e.g. a table feature may want to keep row selection after pressing Backspace),
* then that behavior should be implemented in the view's listener. At the same time, the table feature
* will need to modify this method's behavior too, e.g. to "delete contents and then collapse
* the selection inside the last selected cell" or "delete the row and collapse selection somewhere near".
* That needs to be done in order to ensure that other features which use `deleteContent()` will work well with tables.
*
* @fires deleteContent
* @param {module:engine/model/Selection} selection Selection of which the content should be deleted.
* @param {module:engine/model/Batch} batch Batch to which deltas will be added.
* @param {Object} options See {@link engine.controller.deleteContent}'s options.
*/
deleteContent( selection, batch, options ) {
this.fire( 'deleteContent', { batch, selection, options } );
}
/**
* See {@link engine.controller.modifySelection}.
*
* @fires modifySelection
* @param {module:engine/model/Selection} The selection to modify.
* @param {Object} options See {@link engine.controller.modifySelection}'s options.
*/
modifySelection( selection, options ) {
this.fire( 'modifySelection', { selection, options } );
}
}
mix( DataController, EmitterMixin );
/**
* Event fired when {@link #insertContent} method is called.
* The {@link .insertContent default action of that method} is implemented as a
* listener to this event so it can be fully customized by the features.
*
* @event insertContent
* @param {Object} data
* @param {engine.view.DocumentFragment} data.content The content to insert.
* @param {module:engine/model/Selection} data.selection Selection into which the content should be inserted.
* @param {module:engine/model/Batch} [data.batch] Batch to which deltas will be added.
*/
/**
* Event fired when {@link #deleteContent} method is called.
* The {@link engine.controller.deleteContent default action of that method} is implemented as a
* listener to this event so it can be fully customized by the features.
*
* @event deleteContent
* @param {Object} data
* @param {module:engine/model/Batch} data.batch
* @param {module:engine/model/Selection} data.selection
* @param {Object} data.options See {@link engine.controller.deleteContent}'s options.
*/
/**
* Event fired when {@link #modifySelection} method is called.
* The {@link module:engine/controller/modifyselection~modifySelection default action of that method} is implemented as a
* listener to this event so it can be fully customized by the features.
*
* @event modifySelection
* @param {Object} data
* @param {module:engine/model/Selection} data.selection
* @param {Object} data.options See {@link module:engine/controller/modifyselection~modifySelection}'s options.
*/