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- /**
- * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
- /**
- * @module typing/inputcommand
- */
- import Command from '@ckeditor/ckeditor5-core/src/command/command';
- import ChangeBuffer from './changebuffer';
- /**
- * The input command. Used by the {@link module:typing/input~Input input feature} to handle typing.
- *
- * @extends module:core/command/command~Command
- */
- export default class InputCommand extends Command {
- /**
- * Creates an instance of the command.
- *
- * @param {module:core/editor/editor~Editor} editor
- * @param {Number} undoStepSize The maximum number of atomic changes
- * which can be contained in one batch in the command buffer.
- */
- constructor( editor, undoStepSize ) {
- super( editor );
- /**
- * Typing's change buffer used to group subsequent changes into batches.
- *
- * @readonly
- * @private
- * @member {module:typing/changebuffer~ChangeBuffer} #_buffer
- */
- this._buffer = new ChangeBuffer( editor.document, undoStepSize );
- }
- /**
- * @inheritDoc
- */
- destroy() {
- super.destroy();
- this._buffer.destroy();
- this._buffer = null;
- }
- /**
- * The current change buffer.
- *
- * @type {module:typing/changebuffer~ChangeBuffer}
- */
- get buffer() {
- return this._buffer;
- }
- /**
- * Executes the input command. It replaces the content within the given range with the given text.
- * Replacing is a two step process, first content within the range is removed and then new text is inserted
- * on the beginning of the range (which after removal is a collapsed range).
- *
- * @param {Object} [options] The command options.
- * @param {String} [options.text] Text to be inserted.
- * @param {module:engine/model/range~Range} [options.range] Range in which the text is inserted. Defaults
- * to the first range in the current selection.
- * @param {module:engine/model/position~Position} [options.resultPosition] Position at which the selection
- * should be placed after the insertion. If not specified, the selection will be placed right after
- * the inserted text.
- */
- _doExecute( options = {} ) {
- const doc = this.editor.document;
- const text = options.text;
- const range = options.range || doc.selection.getFirstRange();
- const resultPosition = options.resultPosition;
- let textInsertions = 0;
- if ( range && text !== undefined ) {
- doc.enqueueChanges( () => {
- const isCollapsedRange = range.isCollapsed;
- if ( !isCollapsedRange ) {
- this._buffer.batch.remove( range );
- }
- if ( text && text.length ) {
- textInsertions = text.length;
- this._buffer.batch.weakInsert( range.start, text );
- }
- if ( resultPosition ) {
- this.editor.data.model.selection.collapse( resultPosition );
- } else if ( isCollapsedRange ) {
- // If range was collapsed just shift the selection by the number of inserted characters.
- this.editor.data.model.selection.collapse( range.start.getShiftedBy( textInsertions ) );
- }
- this._buffer.input( textInsertions );
- } );
- }
- }
- }
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