/**
* @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md.
*/
/**
* @module engine/controller/datacontroller
*/
import mix from '@ckeditor/ckeditor5-utils/src/mix';
import ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';
import Mapper from '../conversion/mapper';
import ModelConversionDispatcher from '../conversion/modelconversiondispatcher';
import { insertText } from '../conversion/model-to-view-converters';
import ViewConversionDispatcher from '../conversion/viewconversiondispatcher';
import { convertText, convertToModelFragment } from '../conversion/view-to-model-converters';
import ViewDocumentFragment from '../view/documentfragment';
import ModelRange from '../model/range';
import ModelElement from '../model/element';
import insertContent from './insertcontent';
import deleteContent from './deletecontent';
import modifySelection from './modifyselection';
import getSelectedContent from './getselectedcontent';
/**
* 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 ~DataController#get get}
* and {@link ~DataController#set set} data of the {@link ~DataController#model model}
* using given:
*
* * {@link module:engine/dataprocessor/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~ObservableMixin
*/
export default class DataController {
/**
* Creates data controller instance.
*
* @param {module:engine/model/model~Model} model Data model.
* @param {module:engine/dataprocessor/dataprocessor~DataProcessor} [dataProcessor] Data processor which should used by the controller.
*/
constructor( model, dataProcessor ) {
/**
* Data model.
*
* @readonly
* @member {module:engine/model/model~Model}
*/
this.model = model;
/**
* Data processor used during the conversion.
*
* @readonly
* @member {module: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 {module:engine/conversion/mapper~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:$element', customInsertConverter );
*
* Or use {@link module:engine/conversion/buildmodelconverter~ModelConverterBuilder}:
*
* buildModelConverter().for( data.modelToView ).fromAttribute( 'bold' ).toElement( 'b' );
*
* @readonly
* @member {module:engine/conversion/modelconversiondispatcher~ModelConversionDispatcher}
*/
this.modelToView = new ModelConversionDispatcher( this.model, {
mapper: this.mapper
} );
this.modelToView.on( 'insert:$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 module:engine/conversion/buildviewconverter~ViewConverterBuilder}:
*
* buildViewConverter().for( data.viewToModel ).fromElement( 'b' ).toAttribute( 'bold', 'true' );
*
* @readonly
* @member {module:engine/conversion/viewconversiondispatcher~ViewConversionDispatcher}
*/
this.viewToModel = new ViewConversionDispatcher( this.model, {
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' } );
[ 'insertContent', 'deleteContent', 'modifySelection', 'getSelectedContent' ]
.forEach( methodName => this.decorate( methodName ) );
}
/**
* 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.document.getRoot( rootName ) );
}
/**
* Returns the content of the given {@link module:engine/model/element~Element model's element} or
* {@link module:engine/model/documentfragment~DocumentFragment model document fragment} converted by the
* {@link #modelToView model to view converters} and formatted by the
* {@link #processor data processor}.
*
* @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} modelElementOrFragment
* Element which content will be stringified.
* @returns {String} Output data.
*/
stringify( modelElementOrFragment ) {
// model -> view
const viewDocumentFragment = this.toView( modelElementOrFragment );
// view -> data
return this.processor.toData( viewDocumentFragment );
}
/**
* Returns the content of the given {@link module:engine/model/element~Element model element} or
* {@link module:engine/model/documentfragment~DocumentFragment model document fragment} converted by the
* {@link #modelToView model to view converters} to a
* {@link module:engine/view/documentfragment~DocumentFragment view document fragment}.
*
* @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} modelElementOrFragment
* Element or document fragment which content will be converted.
* @returns {module:engine/view/documentfragment~DocumentFragment} Output view DocumentFragment.
*/
toView( modelElementOrFragment ) {
const modelRange = ModelRange.createIn( modelElementOrFragment );
const viewDocumentFragment = new ViewDocumentFragment();
this.mapper.bindElements( modelElementOrFragment, 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.document.getRoot( rootName );
this.model.enqueueChange( 'transparent', writer => {
// 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.document.selection.removeAllRanges();
this.model.document.selection.clearAttributes();
writer.remove( ModelRange.createIn( modelRoot ) );
writer.insert( this.parse( data ), modelRoot );
} );
}
/**
* 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='$root'] Base context in which the view will be converted to the model. See:
* {@link module:engine/conversion/viewconversiondispatcher~ViewConversionDispatcher#convert}.
* @returns {module:engine/model/documentfragment~DocumentFragment} Parsed data.
*/
parse( data, context = '$root' ) {
// data -> view
const viewDocumentFragment = this.processor.toView( data );
// view -> model
return this.toModel( viewDocumentFragment, context );
}
/**
* Returns wrapped by {module:engine/model/documentfragment~DocumentFragment} result of the given
* {@link module:engine/view/element~Element view element} or
* {@link module:engine/view/documentfragment~DocumentFragment view document fragment} converted by the
* {@link #viewToModel view to model converters}.
*
* When marker elements were converted during conversion process then will be set as DocumentFragment's
* {@link module:engine/model/documentfragment~DocumentFragment#markers static markers map}.
*
* @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewElementOrFragment
* Element or document fragment which content will be converted.
* @param {String} [context='$root'] Base context in which the view will be converted to the model. See:
* {@link module:engine/conversion/viewconversiondispatcher~ViewConversionDispatcher#convert}.
* @returns {module:engine/model/documentfragment~DocumentFragment} Output document fragment.
*/
toModel( viewElementOrFragment, context = '$root' ) {
return this.viewToModel.convert( viewElementOrFragment, { context: [ context ] } );
}
/**
* Removes all event listeners set by the DataController.
*/
destroy() {}
/**
* See {@link module:engine/controller/insertcontent.insertContent}.
*
* @fires insertContent
* @param {module:engine/model/documentfragment~DocumentFragment|module:engine/model/item~Item} content The content to insert.
* @param {module:engine/model/selection~Selection} selection Selection into which the content should be inserted.
*/
insertContent( content, selection ) {
insertContent( this, content, selection );
}
/**
* See {@link module:engine/controller/deletecontent.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 Selection of which the content should be deleted.
* @param {Object} options See {@link module:engine/controller/deletecontent~deleteContent}'s options.
*/
deleteContent( selection, options ) {
deleteContent( this, selection, options );
}
/**
* See {@link module:engine/controller/modifyselection.modifySelection}.
*
* @fires modifySelection
* @param {module:engine/model/selection~Selection} selection The selection to modify.
* @param {Object} options See {@link module:engine/controller/modifyselection~modifySelection}'s options.
*/
modifySelection( selection, options ) {
modifySelection( this, selection, options );
}
/**
* See {@link module:engine/controller/getselectedcontent.getSelectedContent}.
*
* @fires module:engine/controller/datacontroller~DataController#getSelectedContent
* @param {module:engine/model/selection~Selection} selection The selection of which content will be retrieved.
* @returns {module:engine/model/documentfragment~DocumentFragment} Document fragment holding the clone of the selected content.
*/
getSelectedContent( selection ) {
return getSelectedContent( selection );
}
/**
* Checks whether given {@link module:engine/model/range~Range range} or {@link module:engine/model/element~Element element}
* has any content.
*
* Content is any text node or element which is registered in {@link module:engine/model/schema~Schema schema}.
*
* @param {module:engine/model/range~Range|module:engine/model/element~Element} rangeOrElement Range or element to check.
* @returns {Boolean}
*/
hasContent( rangeOrElement ) {
if ( rangeOrElement instanceof ModelElement ) {
rangeOrElement = ModelRange.createIn( rangeOrElement );
}
if ( rangeOrElement.isCollapsed ) {
return false;
}
for ( const item of rangeOrElement.getItems() ) {
// Remember, `TreeWalker` returns always `textProxy` nodes.
if ( item.is( 'textProxy' ) || this.model.schema.objects.has( item.name ) ) {
return true;
}
}
return false;
}
}
mix( DataController, ObservableMixin );
/**
* 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 {Array} args The arguments passed to the original method.
*/
/**
* Event fired when {@link #deleteContent} method is called.
*
* The {@link #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 {Array} args The arguments passed to the original method.
*/
/**
* Event fired when {@link #modifySelection} method is called.
*
* The {@link #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 {Array} args The arguments passed to the original method.
*/
/**
* Event fired when {@link #getSelectedContent} method is called.
*
* The {@link #getSelectedContent default action of that method} is implemented as a
* listener to this event so it can be fully customized by the features.
*
* @event getSelectedContent
* @param {Array} args The arguments passed to the original method.
*/