/*
Copyright (c) 2003-2009, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/

CKEDITOR.plugins.add( 'menu',
{
	beforeInit : function( editor )
	{
		var groups = editor.config.menu_groups.split( ',' ),
			groupsOrder = {};

		for ( var i = 0 ; i < groups.length ; i++ )
			groupsOrder[ groups[ i ] ] = i + 1;

		editor._.menuGroups = groupsOrder;
		editor._.menuItems = {};
	},

	requires : [ 'floatpanel' ]
});

CKEDITOR.tools.extend( CKEDITOR.editor.prototype,
{
	addMenuGroup : function( name, order )
	{
		this._.menuGroups[ name ] = order || 100;
	},

	addMenuItem : function( name, definition )
	{
		if ( this._.menuGroups[ definition.group ] )
			this._.menuItems[ name ] = new CKEDITOR.menuItem( this, name, definition );
	},

	addMenuItems : function( definitions )
	{
		for ( var itemName in definitions )
		{
			this.addMenuItem( itemName, definitions[ itemName ] );
		}
	},

	getMenuItem : function( name )
	{
		return this._.menuItems[ name ];
	}
});

(function()
{
	CKEDITOR.menu = CKEDITOR.tools.createClass(
	{
		$ : function( editor, level )
		{
			this.id = 'cke_' + CKEDITOR.tools.getNextNumber();

			this.editor = editor;
			this.items = [];

			this._.level = level || 1;
		},

		_ :
		{
			showSubMenu : function( index )
			{
				var menu = this._.subMenu,
					item = this.items[ index ],
					subItems = item.getItems && item.getItems();

				// If this item has no subitems, we just hide the submenu, if
				// available, and return back.
				if ( !subItems )
				{
					this._.panel.hideChild();
					return;
				}

				// Create the submenu, if not available, or clean the existing
				// one.
				if ( menu )
					menu.removeAll();
				else
				{
					menu = this._.subMenu = new CKEDITOR.menu( this.editor, this._.level + 1 );
					menu.parent = this;
					menu.onClick = CKEDITOR.tools.bind( this.onClick, this );
				}

				// Add all submenu items to the menu.
				for ( var itemName in subItems )
				{
					menu.add( this.editor.getMenuItem( itemName ) );
				}

				// Get the element representing the current item.
				var element = this._.panel.getBlock( this.id ).element.getDocument().getById( this.id + String( index ) );

				// Show the submenu.
				menu.show( element, 2 );
			}
		},

		proto :
		{
			add : function( item )
			{
				// Later we may sort the items, but Array#sort is not stable in
				// some browsers, here we're forcing the original sequence with
				// 'order' attribute if it hasn't been assigned. (#3868)
				if ( !item.order )
					item.order = this.items.length;

				this.items.push( item );
			},

			removeAll : function()
			{
				this.items = [];
			},

			show : function( offsetParent, corner, offsetX, offsetY )
			{
				var items = this.items,
					editor = this.editor,
					panel = this._.panel,
					element = this._.element;

				// Create the floating panel for this menu.
				if ( !panel )
				{
					panel = this._.panel = new CKEDITOR.ui.floatPanel( this.editor, CKEDITOR.document.getBody(),
						{
							css : [ CKEDITOR.getUrl( editor.skinPath + 'editor.css' ) ],
							level : this._.level - 1,
							className : editor.skinClass + ' cke_contextmenu'
						},
						this._.level);

					panel.onEscape = CKEDITOR.tools.bind( function()
					{
						this.onEscape && this.onEscape();
						this.hide();
					},
					this );

					panel.onHide = CKEDITOR.tools.bind( function()
					{
						this.onHide && this.onHide();
					},
					this );

					// Create an autosize block inside the panel.
					var block = panel.addBlock( this.id );
					block.autoSize = true;

					var keys = block.keys;
					keys[ 40 ]	= 'next';					// ARROW-DOWN
					keys[ 9 ]	= 'next';					// TAB
					keys[ 38 ]	= 'prev';					// ARROW-UP
					keys[ CKEDITOR.SHIFT + 9 ]	= 'prev';	// SHIFT + TAB
					keys[ 32 ]	= 'click';					// SPACE
					keys[ 39 ]	= 'click';					// ARROW-RIGHT

					element = this._.element = block.element;
					element.addClass( editor.skinClass );

					var elementDoc = element.getDocument();
					elementDoc.getBody().setStyle( 'overflow', 'hidden' );
					elementDoc.getElementsByTag( 'html' ).getItem( 0 ).setStyle( 'overflow', 'hidden' );

					this._.itemOverFn = CKEDITOR.tools.addFunction( function( index )
						{
							clearTimeout( this._.showSubTimeout );
							this._.showSubTimeout = CKEDITOR.tools.setTimeout( this._.showSubMenu, editor.config.menu_subMenuDelay, this, [ index ] );
						},
						this);

					this._.itemOutFn = CKEDITOR.tools.addFunction( function( index )
						{
							clearTimeout( this._.showSubTimeout );
						},
						this);

					this._.itemClickFn = CKEDITOR.tools.addFunction( function( index )
						{
							var item = this.items[ index ];

							if ( item.state == CKEDITOR.TRISTATE_DISABLED )
							{
								this.hide();
								return;
							}

							if ( item.getItems )
								this._.showSubMenu( index );
							else
								this.onClick && this.onClick( item );
						},
						this);
				}

				// Put the items in the right order.
				sortItems( items );

				// Build the HTML that composes the menu and its items.
				var output = [ '<div class="cke_menu">' ];

				var length = items.length,
					lastGroup = length && items[ 0 ].group;

				for ( var i = 0 ; i < length ; i++ )
				{
					var item = items[ i ];
					if ( lastGroup != item.group )
					{
						output.push( '<div class="cke_menuseparator"></div>' );
						lastGroup = item.group;
					}

					item.render( this, i, output );
				}

				output.push( '</div>' );

				// Inject the HTML inside the panel.
				element.setHtml( output.join( '' ) );

				// Show the panel.
				if ( this.parent )
					this.parent._.panel.showAsChild( panel, this.id, offsetParent, corner, offsetX, offsetY );
				else
					panel.showBlock( this.id, offsetParent, corner, offsetX, offsetY );
				
				editor.fire( 'menuShow', [ panel ] );
			},

			hide : function()
			{
				this._.panel && this._.panel.hide();
			}
		}
	});

	function sortItems( items )
	{
		items.sort( function( itemA, itemB )
			{
				if ( itemA.group < itemB.group )
					return -1;
				else if ( itemA.group > itemB.group )
					return 1;

				return itemA.order < itemB.order ? -1 :
					itemA.order > itemB.order ? 1 :
					0;
			});
	}
})();

CKEDITOR.menuItem = CKEDITOR.tools.createClass(
{
	$ : function( editor, name, definition )
	{
		CKEDITOR.tools.extend( this, definition,
			// Defaults
			{
				order : 0,
				className : 'cke_button_' + name
			});

		// Transform the group name into its order number.
		this.group = editor._.menuGroups[ this.group ];

		this.editor = editor;
		this.name = name;
	},

	proto :
	{
		render : function( menu, index, output )
		{
			var id = menu.id + String( index ),
				state = ( typeof this.state == 'undefined' ) ? CKEDITOR.TRISTATE_OFF : this.state;

			var classes = ' cke_' + (
				state == CKEDITOR.TRISTATE_ON ? 'on' :
				state == CKEDITOR.TRISTATE_DISABLED ? 'disabled' :
				'off' );

			var htmlLabel = this.label;
			if ( state == CKEDITOR.TRISTATE_DISABLED )
				htmlLabel = this.editor.lang.common.unavailable.replace( '%1', htmlLabel );

			if ( this.className )
				classes += ' ' + this.className;

			output.push(
				'<span class="cke_menuitem">' +
				'<a id="', id, '"' +
					' class="', classes, '" href="javascript:void(\'', ( this.label || '' ).replace( "'", '' ), '\')"' +
					' title="', this.label, '"' +
					' tabindex="-1"' +
					'_cke_focus=1' +
					' hidefocus="true"' );

			// Some browsers don't cancel key events in the keydown but in the
			// keypress.
			// TODO: Check if really needed for Gecko+Mac.
			if ( CKEDITOR.env.opera || ( CKEDITOR.env.gecko && CKEDITOR.env.mac ) )
			{
				output.push(
					' onkeypress="return false;"' );
			}

			// With Firefox, we need to force the button to redraw, otherwise it
			// will remain in the focus state.
			if ( CKEDITOR.env.gecko )
			{
				output.push(
					' onblur="this.style.cssText = this.style.cssText;"' );
			}

			var offset = ( this.iconOffset || 0 ) * -16;
			output.push(
//					' onkeydown="return CKEDITOR.ui.button._.keydown(', index, ', event);"' +
					' onmouseover="CKEDITOR.tools.callFunction(', menu._.itemOverFn, ',', index, ');"' +
					' onmouseout="CKEDITOR.tools.callFunction(', menu._.itemOutFn, ',', index, ');"' +
					' onclick="CKEDITOR.tools.callFunction(', menu._.itemClickFn, ',', index, '); return false;"' +
					'>' +
						'<span class="cke_icon_wrapper"><span class="cke_icon"' +
							( this.icon ? ' style="background-image:url(' + CKEDITOR.getUrl( this.icon ) + ');background-position:0 ' + offset + 'px;"></span>'
							: '' ) +
							'></span></span>' +
						'<span class="cke_label">' );

			if ( this.getItems )
			{
				output.push(
							'<span class="cke_menuarrow"></span>' );
			}

			output.push(
							htmlLabel,
						'</span>' +
				'</a>' +
				'</span>' );
		}
	}
});

/**
 * The amount of time, in milliseconds, the editor waits before showing submenu
 * options when moving the mouse over options that contains submenus, like the
 * "Cell Properties" entry for tables.
 * @type Number
 * @default 400
 * @example
 * // Remove the submenu delay.
 * config.menu_subMenuDelay = 0;
 */
CKEDITOR.config.menu_subMenuDelay = 400;

/**
 * A comma separated list of items group names to be displayed in the context
 * menu. The items order will reflect the order in this list if no priority
 * has been definted in the groups.
 * @type String
 * @default 'clipboard,form,tablecell,tablecellproperties,tablerow,tablecolumn,table,anchor,link,image,flash,checkbox,radio,textfield,hiddenfield,imagebutton,button,select,textarea'
 * @example
 * config.menu_groups = 'clipboard,table,anchor,link,image';
 */
CKEDITOR.config.menu_groups =
	'clipboard,' +
	'form,' +
	'tablecell,tablecellproperties,tablerow,tablecolumn,table,'+
	'anchor,link,image,flash,' +
	'checkbox,radio,textfield,hiddenfield,imagebutton,button,select,textarea';
