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- /**
- * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
- 'use strict';
- CKEDITOR.define( [
- 'document/element',
- 'document/rootelement',
- 'document/transaction',
- 'emittermixin',
- 'utils',
- 'ckeditorerror'
- ], ( Element, RootElement, Transaction, EmitterMixin, utils, CKEditorError ) => {
- const graveyardSymbol = Symbol( 'graveyard' );
- /**
- * Document tree model describes all editable data in the editor. It may contain multiple {@link #roots root elements},
- * for example if the editor have multiple editable areas, each area will be represented by the separate root.
- *
- * All changes in the document are done by {@link document.operation.Operation operations}. To create operations in
- * the simple way use use the {@link document.Transaction transaction} API, for example:
- *
- * document.createTransaction().insert( position, nodes ).split( otherPosition );
- *
- * @see #createTransaction
- *
- * @class document.Document
- */
- class Document {
- /**
- * Creates an empty document instance with no {@link #roots}.
- *
- * @constructor
- */
- constructor() {
- /**
- * List of roots that are owned and managed by this document.
- *
- * @readonly
- * @property {Map} roots
- */
- this.roots = new Map();
- // Graveyard tree root. Document always have a graveyard root, which stores removed nodes.
- this.createRoot( graveyardSymbol );
- /**
- * Document version. It starts from `0` and every operation increases the version number. It is used to ensure that
- * operations are applied on the proper document version. If the {@link document.operation.Operation#baseVersion} will
- * not match document version the {@link document-applyOperation-wrong-version} error is thrown.
- *
- * @readonly
- * @property {Number} version
- */
- this.version = 0;
- }
- /**
- * Graveyard tree root. Document always have a graveyard root, which stores removed nodes.
- *
- * @protected
- * @readonly
- * @property {document.RootElement} _graveyard
- */
- get _graveyard() {
- return this.getRoot( graveyardSymbol );
- }
- /**
- * This is the entry point for all document changes. All changes on the document are done using
- * {@link document.operation.Operation operations}. To create operations in the simple way use the
- * {@link document.Transaction} API available via {@link #createTransaction} method.
- *
- * @param {document.operation.Operation} operation Operation to be applied.
- */
- applyOperation( operation ) {
- if ( operation.baseVersion !== this.version ) {
- /**
- * Only operations with matching versions can be applied.
- *
- * @error document-applyOperation-wrong-version
- * @param {document.operation.Operation} operation
- */
- throw new CKEditorError(
- 'document-applyOperation-wrong-version: Only operations with matching versions can be applied.',
- { operation: operation } );
- }
- let changes = operation._execute();
- this.version++;
- this.fire( 'change', operation.type, changes );
- }
- /**
- * Creates a new top-level root.
- *
- * @param {String|Symbol} name Unique root name.
- * @returns {document.RootElement} Created root.
- */
- createRoot( name ) {
- if ( this.roots.has( name ) ) {
- /**
- * Root with specified name already exists.
- *
- * @error document-createRoot-name-exists
- * @param {document.Document} doc
- * @param {String} name
- */
- throw new CKEditorError(
- 'document-createRoot-name-exists: Root with specified name already exists.',
- { name: name }
- );
- }
- const root = new RootElement( this );
- this.roots.set( name, root );
- return root;
- }
- /**
- * Creates a {@link document.Transaction} instance which allows to change the document.
- *
- * @returns {document.Transaction} Transaction instance.
- */
- createTransaction() {
- return new Transaction( this );
- }
- /**
- * Returns top-level root by it's name.
- *
- * @param {String|Symbol} name Name of the root to get.
- * @returns (document.RootElement} Root registered under given name.
- */
- getRoot( name ) {
- if ( !this.roots.has( name ) ) {
- /**
- * Root with specified name does not exist.
- *
- * @error document-createRoot-root-not-exist
- * @param {String} name
- */
- throw new CKEditorError(
- 'document-createRoot-root-not-exist: Root with specified name does not exist.',
- { name: name }
- );
- }
- return this.roots.get( name );
- }
- /**
- * Fired when document changes by applying an operation.
- *
- * There are 5 types of change:
- *
- * * 'insert' when nodes are inserted,
- * * 'remove' when nodes are removed,
- * * 'reinsert' when remove is undone,
- * * 'move' when nodes are moved,
- * * 'attr' when attributes change.
- *
- * Change event is fired after the change is done. This means that any ranges or positions passed in
- * `changeInfo` are referencing nodes and paths in updated tree model.
- *
- * @event change
- * @param {String} type Change type, possible option: 'insert', 'remove', 'reinsert', 'move', 'attr'.
- * @param {Object} changeInfo Additional information about the change.
- * @param {document.Range} changeInfo.range Range containing changed nodes. Note that for 'remove' the range will be in the
- * {@link #_graveyard graveyard root}.
- * @param {document.Position} [changeInfo.sourcePosition] Change source position. Exists for 'remove', 'reinsert' and 'move'.
- * Note that for 'reinsert' the source position will be in the {@link #_graveyard graveyard root}.
- * @param {document.Attribute} [changeInfo.oldAttr] Only for 'attr' type. If the type is 'attr' and `oldAttr`
- * is `undefined` it means that new attribute was inserted. Otherwise it contains changed or removed attribute.
- * @param {document.Attribute} [changeInfo.newAttr] Only for 'attr' type. If the type is 'attr' and `newAttr`
- * is `undefined` it means that attribute was removed. Otherwise it contains changed or inserted attribute.
- */
- }
- utils.extend( Document.prototype, EmitterMixin );
- return Document;
- } );
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