/*
Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/

/**
 * @fileOverview Spell Check As You Type (SCAYT).
 * Button name : Scayt.
 */

(function()
{
	var commandName 	= 'scaytcheck',
		openPage		= '',
		scayt_paused	= null,
		scayt_control_id = null;

	// Checks if a value exists in an array
	function in_array(needle, haystack)
	{
		var found = false, key;
		for (key in haystack)
		{
			if ((haystack[key] === needle) || ( haystack[key] == needle))
			{
				found = true;
				break;
			}
		}
		return found;
	}

	var onEngineLoad = function()
	{
		var editor = this;

		var createInstance = function()	// Create new instance every time Document is created.
		{
			// Initialise Scayt instance.
			var oParams = {};
			// Get the iframe.
			oParams.srcNodeRef = editor.document.getWindow().$.frameElement;
			// syntax : AppName.AppVersion@AppRevision
			oParams.assocApp  = 'CKEDITOR.' + CKEDITOR.version + '@' + CKEDITOR.revision;
			oParams.customerid = editor.config.scayt_customerid  || '1:WvF0D4-UtPqN1-43nkD4-NKvUm2-daQqk3-LmNiI-z7Ysb4-mwry24-T8YrS3-Q2tpq2';
			oParams.customDictionaryIds = editor.config.scayt_customDictionaryIds || '';
			oParams.userDictionaryName = editor.config.scayt_userDictionaryName || '';
			oParams.sLang = editor.config.scayt_sLang || 'en_US';

			oParams.onBeforeChange = function()
			{
				if ( !editor.checkDirty() )
					setTimeout( function(){ editor.resetDirty(); } );
			};

			var scayt_custom_params = window.scayt_custom_params;
			if ( typeof scayt_custom_params == 'object')
			{
				for ( var k in scayt_custom_params )
				{
					oParams[ k ] = scayt_custom_params[ k ];
				}
			}
			// needs for restoring a specific scayt control settings
			if ( scayt_control_id )
				oParams.id = scayt_control_id;

			var scayt_control = new window.scayt( oParams );

			// Copy config.
			var	lastInstance = plugin.instances[ editor.name ];
			if ( lastInstance )
			{
				scayt_control.sLang = lastInstance.sLang;
				scayt_control.option( lastInstance.option() );
				scayt_control.paused = lastInstance.paused;
			}

			plugin.instances[ editor.name ] = scayt_control;

			//window.scayt.uiTags
			var menuGroup = 'scaytButton';
			var uiTabs = window.scayt.uiTags;
			var fTabs  = [];

			for (var i = 0,l=4; i<l; i++)
			    fTabs.push( uiTabs[i] && plugin.uiTabs[i] );

			plugin.uiTabs = fTabs;
			try {
				scayt_control.setDisabled( scayt_paused === false );
			} catch (e) {}

			editor.fire( 'showScaytState' );
		};

		editor.on( 'contentDom', createInstance );
		editor.on( 'contentDomUnload', function()
			{
				// Remove scripts.
				var scripts = CKEDITOR.document.getElementsByTag( 'script' ),
					scaytIdRegex =  /^dojoIoScript(\d+)$/i,
					scaytSrcRegex =  /^https?:\/\/svc\.spellchecker\.net\/spellcheck\/script\/ssrv\.cgi/i;

				for ( var i=0; i < scripts.count(); i++ )
				{
					var script = scripts.getItem( i ),
						id = script.getId(),
						src = script.getAttribute( 'src' );

					if ( id && src && id.match( scaytIdRegex ) && src.match( scaytSrcRegex ))
						script.remove();
				}
			});

		editor.on( 'beforeCommandExec', function( ev )		// Disable SCAYT before Source command execution.
			{
				if ( (ev.data.name == 'source' ||  ev.data.name == 'newpage') && editor.mode == 'wysiwyg' )
				{
					var scayt_instance = plugin.getScayt( editor );
					if ( scayt_instance )
					{
						scayt_paused = scayt_instance.paused = !scayt_instance.disabled;
						// store a control id for restore a specific scayt control settings
						scayt_control_id = scayt_instance.id;
						scayt_instance.destroy( true );
						delete plugin.instances[ editor.name ];
					}
				}
			});

		editor.on( 'destroy', function( ev )
			{
				var editor = ev.editor,
					scayt_instance = plugin.getScayt( editor );
				// store a control id for restore a specific scayt control settings
				scayt_control_id = scayt_instance.id;
				scayt_instance.destroy( true );
				delete plugin.instances[ editor.name ];
			});

		// Listen to data manipulation to reflect scayt markup.
		editor.on( 'afterSetData', function()
			{
				if ( plugin.isScaytEnabled( editor ) ) {
					window.setTimeout( function(){ plugin.getScayt( editor ).refresh(); }, 10 );
				}
			});

		// Reload spell-checking for current word after insertion completed.
		editor.on( 'insertElement', function()
			{
				var scayt_instance = plugin.getScayt( editor );
				if ( plugin.isScaytEnabled( editor ) )
				{
					// Unlock the selection before reload, SCAYT will take
					// care selection update.
					if ( CKEDITOR.env.ie )
						editor.getSelection().unlock( true );

					// Swallow any SCAYT engine errors.
					window.setTimeout( function(){ scayt_instance.refresh(); }, 10 );
				}
			}, this, null, 50 );

		editor.on( 'insertHtml', function()
			{
				var scayt_instance = plugin.getScayt( editor );
				if ( plugin.isScaytEnabled( editor ) )
				{
					// Unlock the selection before reload, SCAYT will take
					// care selection update.
					if ( CKEDITOR.env.ie )
						editor.getSelection().unlock( true );

					// Swallow any SCAYT engine errors.
					window.setTimeout( function(){ scayt_instance.refresh(); },10 );
				}
			}, this, null, 50 );

		editor.on( 'scaytDialog', function( ev )	// Communication with dialog.
			{
				ev.data.djConfig = window.djConfig;
				ev.data.scayt_control = plugin.getScayt( editor );
				ev.data.tab = openPage;
				ev.data.scayt = window.scayt;
			});

		var dataProcessor = editor.dataProcessor,
			htmlFilter = dataProcessor && dataProcessor.htmlFilter;

		if ( htmlFilter )
		{
			htmlFilter.addRules(
				{
					elements :
					{
						span : function( element )
						{
							if ( element.attributes.scayt_word && element.attributes.scaytid )
							{
								delete element.name;	// Write children, but don't write this node.
								return element;
							}
						}
					}
				}
			);
		}

		if ( editor.document )
			createInstance();
	};

	CKEDITOR.plugins.scayt =
	{
		engineLoaded : false,
		instances : {},
		getScayt : function( editor )
		{
			return this.instances[ editor.name ];
		},
		isScaytReady : function( editor )
		{
			return this.engineLoaded === true &&
				'undefined' !== typeof window.scayt && this.getScayt( editor );
		},
		isScaytEnabled : function( editor )
		{
			var scayt_instance = this.getScayt( editor );
			return ( scayt_instance ) ? scayt_instance.disabled === false : false;
		},
		loadEngine : function( editor )
		{
			// SCAYT doesn't work with Opera.
			if ( CKEDITOR.env.opera )
				return null;

			if ( this.engineLoaded === true )
				return onEngineLoad.apply( editor );	// Add new instance.
			else if ( this.engineLoaded == -1 )			// We are waiting.
				return CKEDITOR.on( 'scaytReady', function(){ onEngineLoad.apply( editor ); } );	// Use function(){} to avoid rejection as duplicate.

			CKEDITOR.on( 'scaytReady', onEngineLoad, editor );
			CKEDITOR.on( 'scaytReady', function()
				{
					this.engineLoaded = true;
				},
				this,
				null,
				0
			);	// First to run.

			this.engineLoaded = -1;	// Loading in progress.

			// compose scayt url
			var protocol = document.location.protocol;
			// Default to 'http' for unknown.
			protocol = protocol.search( /https?:/) != -1? protocol : 'http:';
			var baseUrl  = 'svc.spellchecker.net/spellcheck31/lf/scayt/scayt22.js';

			var scaytUrl  =  editor.config.scayt_srcUrl || ( protocol + '//' + baseUrl );
			var scaytConfigBaseUrl =  plugin.parseUrl( scaytUrl ).path +  '/';

			CKEDITOR._djScaytConfig =
			{
				baseUrl: scaytConfigBaseUrl,
				addOnLoad:
				[
					function()
					{
						CKEDITOR.fireOnce( 'scaytReady' );
					}
				],
				isDebug: false
			};
			// Append javascript code.
			CKEDITOR.document.getHead().append(
				CKEDITOR.document.createElement( 'script',
					{
						attributes :
							{
								type : 'text/javascript',
								src : scaytUrl
							}
					})
			);

			return null;
		},
		parseUrl : function ( data )
		{
			var match;
			if ( data.match && ( match = data.match(/(.*)[\/\\](.*?\.\w+)$/) ) )
				return { path: match[1], file: match[2] };
			else
				return data;
		}
	};

	var plugin = CKEDITOR.plugins.scayt;

	// Context menu constructing.
	var addButtonCommand = function( editor, buttonName, buttonLabel, commandName, command, menugroup, menuOrder )
	{
		editor.addCommand( commandName, command );

		// If the "menu" plugin is loaded, register the menu item.
		editor.addMenuItem( commandName,
			{
				label : buttonLabel,
				command : commandName,
				group : menugroup,
				order : menuOrder
			});
	};

	var commandDefinition =
	{
		preserveState : true,
		editorFocus : false,

		exec: function( editor )
		{
			if ( plugin.isScaytReady( editor ) )
			{
				var isEnabled = plugin.isScaytEnabled( editor );

				this.setState( isEnabled ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_ON );

				var scayt_control = plugin.getScayt( editor );
				scayt_control.setDisabled( isEnabled );
			}
			else if ( !editor.config.scayt_autoStartup && plugin.engineLoaded >= 0 )	// Load first time
			{
				this.setState( CKEDITOR.TRISTATE_DISABLED );

				editor.on( 'showScaytState', function()
					{
						this.removeListener();
						this.setState( plugin.isScaytEnabled( editor ) ? CKEDITOR.TRISTATE_ON : CKEDITOR.TRISTATE_OFF );
					},
					this);

				plugin.loadEngine( editor );
			}
		}
	};

	// Add scayt plugin.
	CKEDITOR.plugins.add( 'scayt',
	{
		requires : [ 'menubutton' ],

		beforeInit : function( editor )
		{
			// Register own rbc menu group.
			editor.config.menu_groups = 'scayt_suggest,scayt_moresuggest,scayt_control,' + editor.config.menu_groups;
		},

		init : function( editor )
		{
			var moreSuggestions = {};
			var mainSuggestions = {};

			// Scayt command.
			var command = editor.addCommand( commandName, commandDefinition );

			// Add Options dialog.
			CKEDITOR.dialog.add( commandName, CKEDITOR.getUrl( this.path + 'dialogs/options.js' ) );
			// read ui tags
			var confuiTabs = editor.config.scayt_uiTabs || '1,1,1';
			var uiTabs =[];
			// string to array convert
			confuiTabs = confuiTabs.split( ',' );
			// check array length ! always must be 3 filled with 1 or 0
			for (var i=0,l=3; i<l; i++)
			{
				var flag = parseInt(confuiTabs[i] || '1' ,10);
				uiTabs.push( flag );
			}

			var menuGroup = 'scaytButton';
			editor.addMenuGroup( menuGroup );
			// combine menu items to render
			var uiMuneItems = {};

			// always added
			uiMuneItems.scaytToggle =
				{
					label : editor.lang.scayt.enable,
					command : commandName,
					group : menuGroup
				};

			if (uiTabs[0] == 1)
				uiMuneItems.scaytOptions =
				{
					label : editor.lang.scayt.options,
					group : menuGroup,
					onClick : function()
					{
						openPage = 'options';
						editor.openDialog( commandName );
					}
				};

			if (uiTabs[1] == 1)
				uiMuneItems.scaytLangs =
				{
					label : editor.lang.scayt.langs,
					group : menuGroup,
					onClick : function()
					{
						openPage = 'langs';
						editor.openDialog( commandName );
					}
				};
			if (uiTabs[2] == 1)
				uiMuneItems.scaytDict =
				{
					label : editor.lang.scayt.dictionariesTab,
					group : menuGroup,
					onClick : function()
					{
						openPage = 'dictionaries';
						editor.openDialog( commandName );
					}
				};
			// always added
			uiMuneItems.scaytAbout =
				{
					label : editor.lang.scayt.about,
					group : menuGroup,
					onClick : function()
					{
						openPage = 'about';
						editor.openDialog( commandName );
					}
				}
			;

			uiTabs[3] = 1; // about us tab is always on
			plugin.uiTabs = uiTabs;

			editor.addMenuItems( uiMuneItems );

				editor.ui.add( 'Scayt', CKEDITOR.UI_MENUBUTTON,
					{
						label : editor.lang.scayt.title,
						title : editor.lang.scayt.title,
						className : 'cke_button_scayt',
						onRender: function()
						{
							command.on( 'state', function()
							{
								this.setState( command.state );
							},
							this);
						},
						onMenu : function()
						{
							var isEnabled = plugin.isScaytEnabled( editor );

							editor.getMenuItem( 'scaytToggle' ).label = editor.lang.scayt[ isEnabled ? 'disable' : 'enable' ];

							return {
								scaytToggle  : CKEDITOR.TRISTATE_OFF,
								scaytOptions : isEnabled && plugin.uiTabs[0] ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED,
								scaytLangs   : isEnabled && plugin.uiTabs[1] ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED,
								scaytDict    : isEnabled && plugin.uiTabs[2] ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED,
								scaytAbout   : isEnabled && plugin.uiTabs[3] ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED
							};
						}
					});

			// If the "contextmenu" plugin is loaded, register the listeners.
			if ( editor.contextMenu && editor.addMenuItems )
			{
				editor.contextMenu.addListener( function(  )
					{
						if ( !plugin.isScaytEnabled( editor ) )
							return null;

						var scayt_control = plugin.getScayt( editor ),
							node = scayt_control.getScaytNode();

						if ( !node )
							return null;

							var word = scayt_control.getWord( node );

						if ( !word )
							return null;

						var sLang = scayt_control.getLang(),
							_r = {},
							items_suggestion = window.scayt.getSuggestion( word, sLang );
						if ( !items_suggestion || !items_suggestion.length )
							return null;
						// Remove unused commands and menuitems
						for ( i in moreSuggestions )
						{
							delete editor._.menuItems[ i ];
							delete editor._.commands[ i ];
						}
						for ( i in mainSuggestions )
						{
							delete editor._.menuItems[ i ];
							delete editor._.commands[ i ];
						}
						moreSuggestions = {};		// Reset items.
						mainSuggestions = {};

						var moreSuggestionsUnable = editor.config.scayt_moreSuggestions || 'on';
						var moreSuggestionsUnableAdded = false;

						var maxSuggestions = editor.config.scayt_maxSuggestions;
						( typeof maxSuggestions != 'number' ) && ( maxSuggestions = 5 );
						!maxSuggestions && ( maxSuggestions = items_suggestion.length );

						var contextCommands = editor.config.scayt_contextCommands || 'all';
						contextCommands = contextCommands.split( '|' );

						for ( var i = 0, l = items_suggestion.length; i < l; i += 1 )
						{
							var commandName = 'scayt_suggestion_' + items_suggestion[i].replace( ' ', '_' );
							var exec = ( function( el, s )
								{
									return {
										exec: function()
										{
											scayt_control.replace(el, s);
										}
									};
								})( node, items_suggestion[i] );

							if ( i < maxSuggestions )
							{
								addButtonCommand( editor, 'button_' + commandName, items_suggestion[i],
									commandName, exec, 'scayt_suggest', i + 1 );
								_r[ commandName ] = CKEDITOR.TRISTATE_OFF;
								mainSuggestions[ commandName ] = CKEDITOR.TRISTATE_OFF;
							}
							else if ( moreSuggestionsUnable == 'on' )
							{
								addButtonCommand( editor, 'button_' + commandName, items_suggestion[i],
									commandName, exec, 'scayt_moresuggest', i + 1 );
								moreSuggestions[ commandName ] = CKEDITOR.TRISTATE_OFF;
								moreSuggestionsUnableAdded = true;
							}
						}

						if ( moreSuggestionsUnableAdded )
						{
							// Register the More suggestions group;
							editor.addMenuItem( 'scayt_moresuggest',
							{
								label : editor.lang.scayt.moreSuggestions,
								group : 'scayt_moresuggest',
								order : 10,
								getItems : function()
								{
									return moreSuggestions;
								}
							});
							mainSuggestions[ 'scayt_moresuggest' ] = CKEDITOR.TRISTATE_OFF;
						}

						if ( in_array( 'all', contextCommands )  || in_array( 'ignore', contextCommands)  )
						{
							var ignore_command = {
								exec: function(){
									scayt_control.ignore( node );
								}
							};
							addButtonCommand( editor, 'ignore', editor.lang.scayt.ignore, 'scayt_ignore', ignore_command, 'scayt_control', 1 );
							mainSuggestions[ 'scayt_ignore' ] = CKEDITOR.TRISTATE_OFF;
						}

						if ( in_array( 'all', contextCommands )  || in_array( 'ignoreall', contextCommands ) )
						{
							var ignore_all_command = {
								exec: function(){
									scayt_control.ignoreAll( node );
								}
							};
							addButtonCommand(editor, 'ignore_all', editor.lang.scayt.ignoreAll, 'scayt_ignore_all', ignore_all_command, 'scayt_control', 2);
							mainSuggestions['scayt_ignore_all'] = CKEDITOR.TRISTATE_OFF;
						}

						if ( in_array( 'all', contextCommands )  || in_array( 'add', contextCommands ) )
						{
							var addword_command = {
								exec: function(){
									window.scayt.addWordToUserDictionary( node );
								}
							};
							addButtonCommand(editor, 'add_word', editor.lang.scayt.addWord, 'scayt_add_word', addword_command, 'scayt_control', 3);
							mainSuggestions['scayt_add_word'] = CKEDITOR.TRISTATE_OFF;
						}

						if ( scayt_control.fireOnContextMenu )
							scayt_control.fireOnContextMenu( editor );

						return mainSuggestions;
					});
			}

			// Start plugin
			if ( editor.config.scayt_autoStartup )
			{
				var showInitialState = function()
				{
					editor.removeListener( 'showScaytState', showInitialState );
					command.setState( plugin.isScaytEnabled( editor ) ? CKEDITOR.TRISTATE_ON : CKEDITOR.TRISTATE_OFF );
				};
				editor.on( 'showScaytState', showInitialState );
				editor.on( 'instanceReady', function()
				{
					plugin.loadEngine( editor );
				});
			}
		},

		afterInit : function( editor )
		{
			// Prevent word marker line from displaying in elements path. (#3570)
			var elementsPathFilters;
			if ( editor._.elementsPath && ( elementsPathFilters = editor._.elementsPath.filters ) )
			{
				elementsPathFilters.push( function( element )
				{
					if ( element.hasAttribute( 'scaytid' ) )
						return false;
				} );
			}

		}
	});
})();

/**
 * If enabled (true), turns on SCAYT automatically after loading the editor.
 * @name CKEDITOR.config.scayt_autoStartup
 * @type Boolean
 * @default false
 * @example
 * config.scayt_autoStartup = true;
 */

/**
 * Defines the number of SCAYT suggestions to show in the main context menu.
 * The possible values are:
 * <ul>
 *	<li>0 (zero): All suggestions are displayed in the main context menu.</li>
 *	<li>Positive number: The maximum number of suggestions to shown in context
 *		menu. Other entries will be shown in "More Suggestions" sub-menu.</li>
 *	<li>Negative number: No suggestions are shown in the main context menu. All
 *		entries will be listed in the "Suggestions" sub-menu.</li>
 * </ul>
 * @name CKEDITOR.config.scayt_maxSuggestions
 * @type Number
 * @default 5
 * @example
 * // Display only three suggestions in the main context menu.
 * config.scayt_maxSuggestions = 3;
 * @example
 * // Do not show the suggestions directly.
 * config.scayt_maxSuggestions = -1;
 */

/**
 * Sets the customer ID for SCAYT. Required for migration from free version
 * with banner to paid version.
 * @name CKEDITOR.config.scayt_customerid
 * @type String
 * @default ''
 * @example
 * // Load SCAYT using my customer ID.
 * config.scayt_customerid  = 'your-encrypted-customer-id';
 */

/**
 * Enables/disables the "More Suggestions" sub-menu in the context menu.
 * The possible values are "on" or "off".
 * @name CKEDITOR.config.scayt_moreSuggestions
 * @type String
 * @default 'on'
 * @example
 * // Disables the "More Suggestions" sub-menu.
 * config.scayt_moreSuggestions = 'off';
 */

/**
 * Customizes the display of SCAYT context menu commands ("Add Word", "Ignore"
 * and "Ignore All"). It must be a string with one or more of the following
 * words separated by a pipe ("|"):
 * <ul>
 *	<li>"off": disables all options.</li>
 *	<li>"all": enables all options.</li>
 *	<li>"ignore": enables the "Ignore" option.</li>
 *	<li>"ignoreall": enables the "Ignore All" option.</li>
 *	<li>"add": enables the "Add Word" option.</li>
 * </ul>
 * @name CKEDITOR.config.scayt_contextCommands
 * @type String
 * @default 'all'
 * @example
 * // Show only "Add Word" and "Ignore All" in the context menu.
 * config.scayt_contextCommands = 'add|ignoreall';
 */

/**
 * Sets the default spellchecking language for SCAYT.
 * @name CKEDITOR.config.scayt_sLang
 * @type String
 * @default 'en_US'
 * @example
 * // Sets SCAYT to German.
 * config.scayt_sLang = 'de_DE';
 */

/**
 * Sets the visibility of the SCAYT tabs in the settings dialog and toolbar
 * button. The value must contain a "1" (enabled) or "0" (disabled) number for
 * each of the following entries, in this precise order, separated by a
 * comma (","): "Options", "Languages" and "Dictionary".
 * @name CKEDITOR.config.scayt_uiTabs
 * @type String
 * @default '1,1,1'
 * @example
 * // Hide the "Languages" tab.
 * config.scayt_uiTabs = '1,0,1';
 */


/**
 * Set the URL to SCAYT core. Required to switch to licensed version of SCAYT application.
 * Further details at http://wiki.spellchecker.net/doku.php?id=3rd:wysiwyg:fckeditor:wscckf3l .
 * @name CKEDITOR.config.scayt_srcUrl
 * @type String
 * @default ''
 * @example
 * config.scayt_srcUrl = "http://my-host/spellcheck/lf/scayt/scayt.js";
 */

/**
 * Links SCAYT to custom dictionaries. It's a string containing dictionary ids
 * separared by commas (","). Available only for licensed version.
 * Further details at http://wiki.spellchecker.net/doku.php?id=custom_dictionary_support .
 * @name CKEDITOR.config.scayt_customDictionaryIds
 * @type String
 * @default ''
 * @example
 * config.scayt_customDictionaryIds = '3021,3456,3478"';
 */

/**
 * Makes it possible to activate a custom dictionary on SCAYT. The user
 * dictionary name must be used. Available only for licensed version.
 * @name CKEDITOR.config.scayt_userDictionaryName
 * @type String
 * @default ''
 * @example
 * config.scayt_userDictionaryName = 'MyDictionary';
 */
