text: ﻿/**
   * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
   * For licensing, see LICENSE.md or http://ckeditor.com/license
   */
  
  /**
   * @fileOverview Increase and Decrease Indent commands.
   */
  
  ( function() {
  	'use strict';
  
  	var TRISTATE_DISABLED = CKEDITOR.TRISTATE_DISABLED,
  		TRISTATE_OFF = CKEDITOR.TRISTATE_OFF;
  
  	CKEDITOR.plugins.add( 'indent', {
  		// jscs:disable maximumLineLength
  		lang: 'af,ar,az,bg,bn,bs,ca,cs,cy,da,de,de-ch,el,en,en-au,en-ca,en-gb,eo,es,es-mx,et,eu,fa,fi,fo,fr,fr-ca,gl,gu,he,hi,hr,hu,id,is,it,ja,ka,km,ko,ku,lt,lv,mk,mn,ms,nb,nl,no,oc,pl,pt,pt-br,ro,ru,si,sk,sl,sq,sr,sr-latn,sv,th,tr,tt,ug,uk,vi,zh,zh-cn', // %REMOVE_LINE_CORE%
  		// jscs:enable maximumLineLength
  		icons: 'indent,indent-rtl,outdent,outdent-rtl', // %REMOVE_LINE_CORE%
  		hidpi: true, // %REMOVE_LINE_CORE%
  
  		init: function( editor ) {
  			var genericDefinition = CKEDITOR.plugins.indent.genericDefinition;
  
  			// Register generic commands.
  			setupGenericListeners( editor, editor.addCommand( 'indent', new genericDefinition( true ) ) );
  			setupGenericListeners( editor, editor.addCommand( 'outdent', new genericDefinition() ) );
  
  			// Create and register toolbar button if possible.
  			if ( editor.ui.addButton ) {
  				editor.ui.addButton( 'Indent', {
  					label: editor.lang.indent.indent,
  					command: 'indent',
  					directional: true,
  					toolbar: 'indent,20'
  				} );
  
  				editor.ui.addButton( 'Outdent', {
  					label: editor.lang.indent.outdent,
  					command: 'outdent',
  					directional: true,
  					toolbar: 'indent,10'
  				} );
  			}
  
  			// Register dirChanged listener.
  			editor.on( 'dirChanged', function( evt ) {
  				var range = editor.createRange(),
  					dataNode = evt.data.node;
  
  				range.setStartBefore( dataNode );
  				range.setEndAfter( dataNode );
  
  				var walker = new CKEDITOR.dom.walker( range ),
  					node;
  
  				while ( ( node = walker.next() ) ) {
  					if ( node.type == CKEDITOR.NODE_ELEMENT ) {
  						// A child with the defined dir is to be ignored.
  						if ( !node.equals( dataNode ) && node.getDirection() ) {
  							range.setStartAfter( node );
  							walker = new CKEDITOR.dom.walker( range );
  							continue;
  						}
  
  						// Switch alignment classes.
  						var classes = editor.config.indentClasses;
  						if ( classes ) {
  							var suffix = ( evt.data.dir == 'ltr' ) ? [ '_rtl', '' ] : [ '', '_rtl' ];
  							for ( var i = 0; i < classes.length; i++ ) {
  								if ( node.hasClass( classes[ i ] + suffix[ 0 ] ) ) {
  									node.removeClass( classes[ i ] + suffix[ 0 ] );
  									node.addClass( classes[ i ] + suffix[ 1 ] );
  								}
  							}
  						}
  
  						// Switch the margins.
  						var marginLeft = node.getStyle( 'margin-right' ),
  							marginRight = node.getStyle( 'margin-left' );
  
  						marginLeft ? node.setStyle( 'margin-left', marginLeft ) : node.removeStyle( 'margin-left' );
  						marginRight ? node.setStyle( 'margin-right', marginRight ) : node.removeStyle( 'margin-right' );
  					}
  				}
  			} );
  		}
  	} );
  
  	/**
  	 * Global command class definitions and global helpers.
  	 *
  	 * @class
  	 * @singleton
  	 */
  	CKEDITOR.plugins.indent = {
  		/**
  		 * A base class for a generic command definition, responsible mainly for creating
  		 * Increase Indent and Decrease Indent toolbar buttons as well as for refreshing
  		 * UI states.
  		 *
  		 * Commands of this class do not perform any indentation by themselves. They
  		 * delegate this job to content-specific indentation commands (i.e. indentlist).
  		 *
  		 * @class CKEDITOR.plugins.indent.genericDefinition
  		 * @extends CKEDITOR.commandDefinition
  		 * @param {CKEDITOR.editor} editor The editor instance this command will be
  		 * applied to.
  		 * @param {String} name The name of the command.
  		 * @param {Boolean} [isIndent] Defines the command as indenting or outdenting.
  		 */
  		genericDefinition: function( isIndent ) {
  			/**
  			 * Determines whether the command belongs to the indentation family.
  			 * Otherwise it is assumed to be an outdenting command.
  			 *
  			 * @readonly
  			 * @property {Boolean} [=false]
  			 */
  			this.isIndent = !!isIndent;
  
  			// Mimic naive startDisabled behavior for outdent.
  			this.startDisabled = !this.isIndent;
  		},
  
  		/**
  		 * A base class for specific indentation command definitions responsible for
  		 * handling a pre-defined set of elements i.e. indentlist for lists or
  		 * indentblock for text block elements.
  		 *
  		 * Commands of this class perform indentation operations and modify the DOM structure.
  		 * They listen for events fired by {@link CKEDITOR.plugins.indent.genericDefinition}
  		 * and execute defined actions.
  		 *
  		 * **NOTE**: This is not an {@link CKEDITOR.command editor command}.
  		 * Context-specific commands are internal, for indentation system only.
  		 *
  		 * @class CKEDITOR.plugins.indent.specificDefinition
  		 * @param {CKEDITOR.editor} editor The editor instance this command will be
  		 * applied to.
  		 * @param {String} name The name of the command.
  		 * @param {Boolean} [isIndent] Defines the command as indenting or outdenting.
  		 */
  		specificDefinition: function( editor, name, isIndent ) {
  			this.name = name;
  			this.editor = editor;
  
  			/**
  			 * An object of jobs handled by the command. Each job consists
  			 * of two functions: `refresh` and `exec` as well as the execution priority.
  			 *
  			 *	* The `refresh` function determines whether a job is doable for
  			 *	  a particular context. These functions are executed in the
  			 *	  order of priorities, one by one, for all plugins that registered
  			 *	  jobs. As jobs are related to generic commands, refreshing
  			 *	  occurs when the global command is firing the `refresh` event.
  			 *
  			 *	  **Note**: This function must return either {@link CKEDITOR#TRISTATE_DISABLED}
  			 *	  or {@link CKEDITOR#TRISTATE_OFF}.
  			 *
  			 *	* The `exec` function modifies the DOM if possible. Just like
  			 *	  `refresh`, `exec` functions are executed in the order of priorities
  			 *	  while the generic command is executed. This function is not executed
  			 *	  if `refresh` for this job returned {@link CKEDITOR#TRISTATE_DISABLED}.
  			 *
  			 *	  **Note**: This function must return a Boolean value, indicating whether it
  			 *	  was successful. If a job was successful, then no other jobs are being executed.
  			 *
  			 * Sample definition:
  			 *
  			 *		command.jobs = {
  			 *			// Priority = 20.
  			 *			'20': {
  			 *				refresh( editor, path ) {
  			 *					if ( condition )
  			 *						return CKEDITOR.TRISTATE_OFF;
  			 *					else
  			 *						return CKEDITOR.TRISTATE_DISABLED;
  			 *				},
  			 *				exec( editor ) {
  			 *					// DOM modified! This was OK.
  			 *					return true;
  			 *				}
  			 *			},
  			 *			// Priority = 60. This job is done later.
  			 *			'60': {
  			 *				// Another job.
  			 *			}
  			 *		};
  			 *
  			 * For additional information, please check comments for
  			 * the `setupGenericListeners` function.
  			 *
  			 * @readonly
  			 * @property {Object} [={}]
  			 */
  			this.jobs = {};
  
  			/**
  			 * Determines whether the editor that the command belongs to has
  			 * {@link CKEDITOR.config#enterMode config.enterMode} set to {@link CKEDITOR#ENTER_BR}.
  			 *
  			 * @readonly
  			 * @see CKEDITOR.config#enterMode
  			 * @property {Boolean} [=false]
  			 */
  			this.enterBr = editor.config.enterMode == CKEDITOR.ENTER_BR;
  
  			/**
  			 * Determines whether the command belongs to the indentation family.
  			 * Otherwise it is assumed to be an outdenting command.
  			 *
  			 * @readonly
  			 * @property {Boolean} [=false]
  			 */
  			this.isIndent = !!isIndent;
  
  			/**
  			 * The name of the global command related to this one.
  			 *
  			 * @readonly
  			 */
  			this.relatedGlobal = isIndent ? 'indent' : 'outdent';
  
  			/**
  			 * A keystroke associated with this command (*Tab* or *Shift+Tab*).
  			 *
  			 * @readonly
  			 */
  			this.indentKey = isIndent ? 9 : CKEDITOR.SHIFT + 9;
  
  			/**
  			 * Stores created markers for the command so they can eventually be
  			 * purged after the `exec` function is run.
  			 */
  			this.database = {};
  		},
  
  		/**
  		 * Registers content-specific commands as a part of the indentation system
  		 * directed by generic commands. Once a command is registered,
  		 * it listens for events of a related generic command.
  		 *
  		 *		CKEDITOR.plugins.indent.registerCommands( editor, {
  		 *			'indentlist': new indentListCommand( editor, 'indentlist' ),
  		 *			'outdentlist': new indentListCommand( editor, 'outdentlist' )
  		 *		} );
  		 *
  		 * Content-specific commands listen for the generic command's `exec` and
  		 * try to execute their own jobs, one after another. If some execution is
  		 * successful, `evt.data.done` is set so no more jobs (commands) are involved.
  		 *
  		 * Content-specific commands also listen for the generic command's `refresh`
  		 * and fill the `evt.data.states` object with states of jobs. A generic command
  		 * uses this data to determine its own state and to update the UI.
  		 *
  		 * @member CKEDITOR.plugins.indent
  		 * @param {CKEDITOR.editor} editor The editor instance this command is
  		 * applied to.
  		 * @param {Object} commands An object of {@link CKEDITOR.command}.
  		 */
  		registerCommands: function( editor, commands ) {
  			editor.on( 'pluginsLoaded', function() {
  				for ( var name in commands ) {
  					( function( editor, command ) {
  						var relatedGlobal = editor.getCommand( command.relatedGlobal );
  
  						for ( var priority in command.jobs ) {
  							// Observe generic exec event and execute command when necessary.
  							// If the command was successfully handled by the command and
  							// DOM has been modified, stop event propagation so no other plugin
  							// will bother. Job is done.
  							relatedGlobal.on( 'exec', function( evt ) {
  								if ( evt.data.done )
  									return;
  
  								// Make sure that anything this command will do is invisible
  								// for undoManager. What undoManager only can see and
  								// remember is the execution of the global command (relatedGlobal).
  								editor.fire( 'lockSnapshot' );
  
  								if ( command.execJob( editor, priority ) )
  									evt.data.done = true;
  
  								editor.fire( 'unlockSnapshot' );
  
  								// Clean up the markers.
  								CKEDITOR.dom.element.clearAllMarkers( command.database );
  							}, this, null, priority );
  
  							// Observe generic refresh event and force command refresh.
  							// Once refreshed, save command state in event data
  							// so generic command plugin can update its own state and UI.
  							relatedGlobal.on( 'refresh', function( evt ) {
  								if ( !evt.data.states )
  									evt.data.states = {};
  
  								evt.data.states[ command.name + '@' + priority ] =
  									command.refreshJob( editor, priority, evt.data.path );
  							}, this, null, priority );
  						}
  
  						// Since specific indent commands have no UI elements,
  						// they need to be manually registered as a editor feature.
  						editor.addFeature( command );
  					} )( this, commands[ name ] );
  				}
  			} );
  		}
  	};
  
  	CKEDITOR.plugins.indent.genericDefinition.prototype = {
  		context: 'p',
  
  		exec: function() {}
  	};
  
  	CKEDITOR.plugins.indent.specificDefinition.prototype = {
  		/**
  		 * Executes the content-specific procedure if the context is correct.
  		 * It calls the `exec` function of a job of the given `priority`
  		 * that modifies the DOM.
  		 *
  		 * @param {CKEDITOR.editor} editor The editor instance this command
  		 * will be applied to.
  		 * @param {Number} priority The priority of the job to be executed.
  		 * @returns {Boolean} Indicates whether the job was successful.
  		 */
  		execJob: function( editor, priority ) {
  			var job = this.jobs[ priority ];
  
  			if ( job.state != TRISTATE_DISABLED )
  				return job.exec.call( this, editor );
  		},
  
  		/**
  		 * Calls the `refresh` function of a job of the given `priority`.
  		 * The function returns the state of the job which can be either
  		 * {@link CKEDITOR#TRISTATE_DISABLED} or {@link CKEDITOR#TRISTATE_OFF}.
  		 *
  		 * @param {CKEDITOR.editor} editor The editor instance this command
  		 * will be applied to.
  		 * @param {Number} priority The priority of the job to be executed.
  		 * @returns {Number} The state of the job.
  		 */
  		refreshJob: function( editor, priority, path ) {
  			var job = this.jobs[ priority ];
  
  			if ( !editor.activeFilter.checkFeature( this ) )
  				job.state = TRISTATE_DISABLED;
  			else
  				job.state = job.refresh.call( this, editor, path );
  
  			return job.state;
  		},
  
  		/**
  		 * Checks if the element path contains the element handled
  		 * by this indentation command.
  		 *
  		 * @param {CKEDITOR.dom.elementPath} node A path to be checked.
  		 * @returns {CKEDITOR.dom.element}
  		 */
  		getContext: function( path ) {
  			return path.contains( this.context );
  		}
  	};
  
  	/**
  	 * Attaches event listeners for this generic command. Since the indentation
  	 * system is event-oriented, generic commands communicate with
  	 * content-specific commands using the `exec` and `refresh` events.
  	 *
  	 * Listener priorities are crucial. Different indentation phases
  	 * are executed with different priorities.
  	 *
  	 * For the `exec` event:
  	 *
  	 *	* 0: Selection and bookmarks are saved by the generic command.
  	 *	* 1-99: Content-specific commands try to indent the code by executing
  	 *	  their own jobs ({@link CKEDITOR.plugins.indent.specificDefinition#jobs}).
  	 *	* 100: Bookmarks are re-selected by the generic command.
  	 *
  	 * The visual interpretation looks as follows:
  	 *
  	 *		  +------------------+
  	 *		  | Exec event fired |
  	 *		  +------ + ---------+
  	 *		          |
  	 *		        0 -<----------+ Selection and bookmarks saved.
  	 *		          |
  	 *		          |
  	 *		       25 -<---+ Exec 1st job of plugin#1 (return false, continuing...).
  	 *		          |
  	 *		          |
  	 *		       50 -<---+ Exec 1st job of plugin#2 (return false, continuing...).
  	 *		          |
  	 *		          |
  	 *		       75 -<---+ Exec 2nd job of plugin#1 (only if plugin#2 failed).
  	 *		          |
  	 *		          |
  	 *		      100 -<-----------+ Re-select bookmarks, clean-up.
  	 *		          |
  	 *		+-------- v ----------+
  	 *		| Exec event finished |
  	 *		+---------------------+
  	 *
  	 * For the `refresh` event:
  	 *
  	 *	* <100: Content-specific commands refresh their job states according
  	 *	  to the given path. Jobs save their states in the `evt.data.states` object
  	 *	  passed along with the event. This can be either {@link CKEDITOR#TRISTATE_DISABLED}
  	 *	  or {@link CKEDITOR#TRISTATE_OFF}.
  	 *	* 100: Command state is determined according to what states
  	 *	  have been returned by content-specific jobs (`evt.data.states`).
  	 *	  UI elements are updated at this stage.
  	 *
  	 *	  **Note**: If there is at least one job with the {@link CKEDITOR#TRISTATE_OFF} state,
  	 *	  then the generic command state is also {@link CKEDITOR#TRISTATE_OFF}. Otherwise,
  	 *	  the command state is {@link CKEDITOR#TRISTATE_DISABLED}.
  	 *
  	 * @param {CKEDITOR.command} command The command to be set up.
  	 * @private
  	 */
  	function setupGenericListeners( editor, command ) {
  		var selection, bookmarks;
  
  		// Set the command state according to content-specific
  		// command states.
  		command.on( 'refresh', function( evt ) {
  			// If no state comes with event data, disable command.
  			var states = [ TRISTATE_DISABLED ];
  
  			for ( var s in evt.data.states )
  				states.push( evt.data.states[ s ] );
  
  			this.setState( CKEDITOR.tools.search( states, TRISTATE_OFF ) ? TRISTATE_OFF : TRISTATE_DISABLED );
  		}, command, null, 100 );
  
  		// Initialization. Save bookmarks and mark event as not handled
  		// by any plugin (command) yet.
  		command.on( 'exec', function( evt ) {
  			selection = editor.getSelection();
  			bookmarks = selection.createBookmarks( 1 );
  
  			// Mark execution as not handled yet.
  			if ( !evt.data )
  				evt.data = {};
  
  			evt.data.done = false;
  		}, command, null, 0 );
  
  		// Housekeeping. Make sure selectionChange will be called.
  		// Also re-select previously saved bookmarks.
  		command.on( 'exec', function() {
  			editor.forceNextSelectionCheck();
  			selection.selectBookmarks( bookmarks );
  		}, command, null, 100 );
  	}
  } )();
  