# all files / src/ Toolbar.js

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     /**
     * Toolbars are complex interface components that permit users to easily access a variety
     * of {@link OO.ui.Tool tools} (e.g., formatting commands) and actions, which are additional commands that are
     * part of the toolbar, but not configured as tools.
     *
     * Individual tools are customized and then registered with a {@link OO.ui.ToolFactory tool factory}, which creates
     * the tools on demand. Each tool has a symbolic name (used when registering the tool), a title (e.g., ‘Insert
     * image’), and an icon.
     *
     * Individual tools are organized in {@link OO.ui.ToolGroup toolgroups}, which can be {@link OO.ui.MenuToolGroup menus}
     * of tools, {@link OO.ui.ListToolGroup lists} of tools, or a single {@link OO.ui.BarToolGroup bar} of tools.
     * The arrangement and order of the toolgroups is customized when the toolbar is set up. Tools can be presented in
     * any order, but each can only appear once in the toolbar.
     *
     * The toolbar can be synchronized with the state of the external "application", like a text
     * editor's editing area, marking tools as active/inactive (e.g. a 'bold' tool would be shown as
     * active when the text cursor was inside bolded text) or enabled/disabled (e.g. a table caption
     * tool would be disabled while the user is not editing a table). A state change is signalled by
     * emitting the {@link #event-updateState 'updateState' event}, which calls Tools'
     * {@link OO.ui.Tool#onUpdateState onUpdateState method}.
     *
     * The following is an example of a basic toolbar.
     *
     *     @example
     *     // Example of a toolbar
     *     // Create the toolbar
     *     var toolFactory = new OO.ui.ToolFactory();
     *     var toolGroupFactory = new OO.ui.ToolGroupFactory();
     *     var toolbar = new OO.ui.Toolbar( toolFactory, toolGroupFactory );
     *
     *     // We will be placing status text in this element when tools are used
     *     var $area = $( '<p>' ).text( 'Toolbar example' );
     *
     *     // Define the tools that we're going to place in our toolbar
     *
     *     // Create a class inheriting from OO.ui.Tool
     *     function SearchTool() {
     *         SearchTool.parent.apply( this, arguments );
     *     }
     *     OO.inheritClass( SearchTool, OO.ui.Tool );
     *     // Each tool must have a 'name' (used as an internal identifier, see later) and at least one
     *     // of 'icon' and 'title' (displayed icon and text).
     *     SearchTool.static.name = 'search';
     *     SearchTool.static.icon = 'search';
     *     SearchTool.static.title = 'Search...';
     *     // Defines the action that will happen when this tool is selected (clicked).
     *     SearchTool.prototype.onSelect = function () {
     *         $area.text( 'Search tool clicked!' );
     *         // Never display this tool as "active" (selected).
     *         this.setActive( false );
     *     };
     *     SearchTool.prototype.onUpdateState = function () {};
     *     // Make this tool available in our toolFactory and thus our toolbar
     *     toolFactory.register( SearchTool );
     *
     *     // Register two more tools, nothing interesting here
     *     function SettingsTool() {
     *         SettingsTool.parent.apply( this, arguments );
     *     }
     *     OO.inheritClass( SettingsTool, OO.ui.Tool );
     *     SettingsTool.static.name = 'settings';
     *     SettingsTool.static.icon = 'settings';
     *     SettingsTool.static.title = 'Change settings';
     *     SettingsTool.prototype.onSelect = function () {
     *         $area.text( 'Settings tool clicked!' );
     *         this.setActive( false );
     *     };
     *     SettingsTool.prototype.onUpdateState = function () {};
     *     toolFactory.register( SettingsTool );
     *
     *     // Register two more tools, nothing interesting here
     *     function StuffTool() {
     *         StuffTool.parent.apply( this, arguments );
     *     }
     *     OO.inheritClass( StuffTool, OO.ui.Tool );
     *     StuffTool.static.name = 'stuff';
     *     StuffTool.static.icon = 'ellipsis';
     *     StuffTool.static.title = 'More stuff';
     *     StuffTool.prototype.onSelect = function () {
     *         $area.text( 'More stuff tool clicked!' );
     *         this.setActive( false );
     *     };
     *     StuffTool.prototype.onUpdateState = function () {};
     *     toolFactory.register( StuffTool );
     *
     *     // This is a PopupTool. Rather than having a custom 'onSelect' action, it will display a
     *     // little popup window (a PopupWidget).
     *     function HelpTool( toolGroup, config ) {
     *         OO.ui.PopupTool.call( this, toolGroup, $.extend( { popup: {
     *             padded: true,
     *             label: 'Help',
     *             head: true
     *         } }, config ) );
     *         this.popup.$body.append( '<p>I am helpful!</p>' );
     *     }
     *     OO.inheritClass( HelpTool, OO.ui.PopupTool );
     *     HelpTool.static.name = 'help';
     *     HelpTool.static.icon = 'help';
     *     HelpTool.static.title = 'Help';
     *     toolFactory.register( HelpTool );
     *
     *     // Finally define which tools and in what order appear in the toolbar. Each tool may only be
     *     // used once (but not all defined tools must be used).
     *     toolbar.setup( [
     *         {
     *             // 'bar' tool groups display tools' icons only, side-by-side.
     *             type: 'bar',
     *             include: [ 'search', 'help' ]
     *         },
     *         {
     *             // 'list' tool groups display both the titles and icons, in a dropdown list.
     *             type: 'list',
     *             indicator: 'down',
     *             label: 'More',
     *             include: [ 'settings', 'stuff' ]
     *         }
     *         // Note how the tools themselves are toolgroup-agnostic - the same tool can be displayed
     *         // either in a 'list' or a 'bar'. There is a 'menu' tool group too, not showcased here,
     *         // since it's more complicated to use. (See the next example snippet on this page.)
     *     ] );
     *
     *     // Create some UI around the toolbar and place it in the document
     *     var frame = new OO.ui.PanelLayout( {
     *         expanded: false,
     *         framed: true
     *     } );
     *     var contentFrame = new OO.ui.PanelLayout( {
     *         expanded: false,
     *         padded: true
     *     } );
     *     frame.$element.append(
     *         toolbar.$element,
     *         contentFrame.$element.append( $area )
     *     );
     *     $( 'body' ).append( frame.$element );
     *
     *     // Here is where the toolbar is actually built. This must be done after inserting it into the
     *     // document.
     *     toolbar.initialize();
     *     toolbar.emit( 'updateState' );
     *
     * The following example extends the previous one to illustrate 'menu' toolgroups and the usage of
     * {@link #event-updateState 'updateState' event}.
     *
     *     @example
     *     // Create the toolbar
     *     var toolFactory = new OO.ui.ToolFactory();
     *     var toolGroupFactory = new OO.ui.ToolGroupFactory();
     *     var toolbar = new OO.ui.Toolbar( toolFactory, toolGroupFactory );
     *
     *     // We will be placing status text in this element when tools are used
     *     var $area = $( '<p>' ).text( 'Toolbar example' );
     *
     *     // Define the tools that we're going to place in our toolbar
     *
     *     // Create a class inheriting from OO.ui.Tool
     *     function SearchTool() {
     *         SearchTool.parent.apply( this, arguments );
     *     }
     *     OO.inheritClass( SearchTool, OO.ui.Tool );
     *     // Each tool must have a 'name' (used as an internal identifier, see later) and at least one
     *     // of 'icon' and 'title' (displayed icon and text).
     *     SearchTool.static.name = 'search';
     *     SearchTool.static.icon = 'search';
     *     SearchTool.static.title = 'Search...';
     *     // Defines the action that will happen when this tool is selected (clicked).
     *     SearchTool.prototype.onSelect = function () {
     *         $area.text( 'Search tool clicked!' );
     *         // Never display this tool as "active" (selected).
     *         this.setActive( false );
     *     };
     *     SearchTool.prototype.onUpdateState = function () {};
     *     // Make this tool available in our toolFactory and thus our toolbar
     *     toolFactory.register( SearchTool );
     *
     *     // Register two more tools, nothing interesting here
     *     function SettingsTool() {
     *         SettingsTool.parent.apply( this, arguments );
     *         this.reallyActive = false;
     *     }
     *     OO.inheritClass( SettingsTool, OO.ui.Tool );
     *     SettingsTool.static.name = 'settings';
     *     SettingsTool.static.icon = 'settings';
     *     SettingsTool.static.title = 'Change settings';
     *     SettingsTool.prototype.onSelect = function () {
     *         $area.text( 'Settings tool clicked!' );
     *         // Toggle the active state on each click
     *         this.reallyActive = !this.reallyActive;
     *         this.setActive( this.reallyActive );
     *         // To update the menu label
     *         this.toolbar.emit( 'updateState' );
     *     };
     *     SettingsTool.prototype.onUpdateState = function () {};
     *     toolFactory.register( SettingsTool );
     *
     *     // Register two more tools, nothing interesting here
     *     function StuffTool() {
     *         StuffTool.parent.apply( this, arguments );
     *         this.reallyActive = false;
     *     }
     *     OO.inheritClass( StuffTool, OO.ui.Tool );
     *     StuffTool.static.name = 'stuff';
     *     StuffTool.static.icon = 'ellipsis';
     *     StuffTool.static.title = 'More stuff';
     *     StuffTool.prototype.onSelect = function () {
     *         $area.text( 'More stuff tool clicked!' );
     *         // Toggle the active state on each click
     *         this.reallyActive = !this.reallyActive;
     *         this.setActive( this.reallyActive );
     *         // To update the menu label
     *         this.toolbar.emit( 'updateState' );
     *     };
     *     StuffTool.prototype.onUpdateState = function () {};
     *     toolFactory.register( StuffTool );
     *
     *     // This is a PopupTool. Rather than having a custom 'onSelect' action, it will display a
     *     // little popup window (a PopupWidget). 'onUpdateState' is also already implemented.
     *     function HelpTool( toolGroup, config ) {
     *         OO.ui.PopupTool.call( this, toolGroup, $.extend( { popup: {
     *             padded: true,
     *             label: 'Help',
     *             head: true
     *         } }, config ) );
     *         this.popup.$body.append( '<p>I am helpful!</p>' );
     *     }
     *     OO.inheritClass( HelpTool, OO.ui.PopupTool );
     *     HelpTool.static.name = 'help';
     *     HelpTool.static.icon = 'help';
     *     HelpTool.static.title = 'Help';
     *     toolFactory.register( HelpTool );
     *
     *     // Finally define which tools and in what order appear in the toolbar. Each tool may only be
     *     // used once (but not all defined tools must be used).
     *     toolbar.setup( [
     *         {
     *             // 'bar' tool groups display tools' icons only, side-by-side.
     *             type: 'bar',
     *             include: [ 'search', 'help' ]
     *         },
     *         {
     *             // 'menu' tool groups display both the titles and icons, in a dropdown menu.
     *             // Menu label indicates which items are selected.
     *             type: 'menu',
     *             indicator: 'down',
     *             include: [ 'settings', 'stuff' ]
     *         }
     *     ] );
     *
     *     // Create some UI around the toolbar and place it in the document
     *     var frame = new OO.ui.PanelLayout( {
     *         expanded: false,
     *         framed: true
     *     } );
     *     var contentFrame = new OO.ui.PanelLayout( {
     *         expanded: false,
     *         padded: true
     *     } );
     *     frame.$element.append(
     *         toolbar.$element,
     *         contentFrame.$element.append( $area )
     *     );
     *     $( 'body' ).append( frame.$element );
     *
     *     // Here is where the toolbar is actually built. This must be done after inserting it into the
     *     // document.
     *     toolbar.initialize();
     *     toolbar.emit( 'updateState' );
     *
     * @class
     * @extends OO.ui.Element
     * @mixins OO.EventEmitter
     * @mixins OO.ui.mixin.GroupElement
     *
     * @constructor
     * @param {OO.ui.ToolFactory} toolFactory Factory for creating tools
     * @param {OO.ui.ToolGroupFactory} toolGroupFactory Factory for creating toolgroups
     * @param {Object} [config] Configuration options
     * @cfg {boolean} [actions] Add an actions section to the toolbar. Actions are commands that are included
     *  in the toolbar, but are not configured as tools. By default, actions are displayed on the right side of
     *  the toolbar.
     * @cfg {string} [position='top'] Whether the toolbar is positioned above ('top') or below ('bottom') content.
     * @cfg {jQuery} [$overlay] An overlay for the popup.
     *  See <https://www.mediawiki.org/wiki/OOUI/Concepts#Overlays>.
     */
    OO.ui.Toolbar = function OoUiToolbar( toolFactory, toolGroupFactory, config ) {
    	// Allow passing positional parameters inside the config object
    	if ( OO.isPlainObject( toolFactory ) && config === undefined ) {
    		config = toolFactory;
    		toolFactory = config.toolFactory;
    		toolGroupFactory = config.toolGroupFactory;
    	}

    	// Configuration initialization
    	config = config || {};

    	// Parent constructor
    	OO.ui.Toolbar.parent.call( this, config );

    	// Mixin constructors
    	OO.EventEmitter.call( this );
    	OO.ui.mixin.GroupElement.call( this, config );

    	// Properties
    	this.toolFactory = toolFactory;
    	this.toolGroupFactory = toolGroupFactory;
    	this.groups = [];
    	this.tools = {};
    	this.position = config.position || 'top';
    	this.$bar = $( '<div>' );
    	this.$actions = $( '<div>' );
    	this.$popups = $( '<div>' );
    	this.initialized = false;
    	this.narrowThreshold = null;
    	this.onWindowResizeHandler = this.onWindowResize.bind( this );
    	this.$overlay = ( config.$overlay === true ? OO.ui.getDefaultOverlay() : config.$overlay ) || this.$element;

    	// Events
    	this.$element
    		.add( this.$bar ).add( this.$group ).add( this.$actions )
    		.on( 'mousedown keydown', this.onPointerDown.bind( this ) );

    	// Initialization
    	this.$group.addClass( 'oo-ui-toolbar-tools' );
    	if ( config.actions ) {
    		this.$bar.append( this.$actions.addClass( 'oo-ui-toolbar-actions' ) );
    	}
    	this.$popups.addClass( 'oo-ui-toolbar-popups' );
    	this.$bar
    		.addClass( 'oo-ui-toolbar-bar' )
    		.append( this.$group, '<div style="clear:both"></div>' );
    	// Possible classes: oo-ui-toolbar-position-top, oo-ui-toolbar-position-bottom
    	this.$element.addClass( 'oo-ui-toolbar oo-ui-toolbar-position-' + this.position ).append( this.$bar );
    	this.$overlay.append( this.$popups );
    };

    /* Setup */

    OO.inheritClass( OO.ui.Toolbar, OO.ui.Element );
    OO.mixinClass( OO.ui.Toolbar, OO.EventEmitter );
    OO.mixinClass( OO.ui.Toolbar, OO.ui.mixin.GroupElement );

    /* Events */

    /**
     * @event updateState
     *
     * An 'updateState' event must be emitted on the Toolbar (by calling `toolbar.emit( 'updateState' )`)
     * every time the state of the application using the toolbar changes, and an update to the state of
     * tools is required.
     *
     * @param {...Mixed} data Application-defined parameters
     */

    /* Methods */

    /**
     * Get the tool factory.
     *
     * @return {OO.ui.ToolFactory} Tool factory
     */
    OO.ui.Toolbar.prototype.getToolFactory = function () {
    	return this.toolFactory;
    };

    /**
     * Get the toolgroup factory.
     *
     * @return {OO.Factory} Toolgroup factory
     */
    OO.ui.Toolbar.prototype.getToolGroupFactory = function () {
    	return this.toolGroupFactory;
    };

    /**
     * Handles mouse down events.
     *
     * @private
     * @param {jQuery.Event} e Mouse down event
     */
    OO.ui.Toolbar.prototype.onPointerDown = function ( e ) {
    	var $closestWidgetToEvent = $( e.target ).closest( '.oo-ui-widget' ),
    		$closestWidgetToToolbar = this.$element.closest( '.oo-ui-widget' );
    	if ( !$closestWidgetToEvent.length || $closestWidgetToEvent[ 0 ] === $closestWidgetToToolbar[ 0 ] ) {
    		return false;
    	}
    };

    /**
     * Handle window resize event.
     *
     * @private
     * @param {jQuery.Event} e Window resize event
     */
    OO.ui.Toolbar.prototype.onWindowResize = function () {
    	this.$element.add( this.$popups ).toggleClass(
    		'oo-ui-toolbar-narrow',
    		this.$bar[ 0 ].clientWidth <= this.getNarrowThreshold()
    	);
    };

    /**
     * Get the (lazily-computed) width threshold for applying the oo-ui-toolbar-narrow
     * class.
     *
     * @private
     * @return {number} Width threshold in pixels
     */
    OO.ui.Toolbar.prototype.getNarrowThreshold = function () {
    	if ( this.narrowThreshold === null ) {
    		this.narrowThreshold = this.$group[ 0 ].offsetWidth + this.$actions[ 0 ].offsetWidth;
    	}
    	return this.narrowThreshold;
    };

    /**
     * Sets up handles and preloads required information for the toolbar to work.
     * This must be called after it is attached to a visible document and before doing anything else.
     */
    OO.ui.Toolbar.prototype.initialize = function () {
    	if ( !this.initialized ) {
    		this.initialized = true;
    		$( this.getElementWindow() ).on( 'resize', this.onWindowResizeHandler );
    		this.onWindowResize();
    	}
    };

    /**
     * Set up the toolbar.
     *
     * The toolbar is set up with a list of toolgroup configurations that specify the type of
     * toolgroup ({@link OO.ui.BarToolGroup bar}, {@link OO.ui.MenuToolGroup menu}, or {@link OO.ui.ListToolGroup list})
     * to add and which tools to include, exclude, promote, or demote within that toolgroup. Please
     * see {@link OO.ui.ToolGroup toolgroups} for more information about including tools in toolgroups.
     *
     * @param {Object.<string,Array>} groups List of toolgroup configurations
     * @param {Array|string} [groups.include] Tools to include in the toolgroup
     * @param {Array|string} [groups.exclude] Tools to exclude from the toolgroup
     * @param {Array|string} [groups.promote] Tools to promote to the beginning of the toolgroup
     * @param {Array|string} [groups.demote] Tools to demote to the end of the toolgroup
     */
    OO.ui.Toolbar.prototype.setup = function ( groups ) {
    	var i, len, type, group,
    		items = [],
    		defaultType = 'bar';

    	// Cleanup previous groups
    	this.reset();

    	// Build out new groups
    	for ( i = 0, len = groups.length; i < len; i++ ) {
    		group = groups[ i ];
    		if ( group.include === '*' ) {
    			// Apply defaults to catch-all groups
    			if ( group.type === undefined ) {
    				group.type = 'list';
    			}
    			if ( group.label === undefined ) {
    				group.label = OO.ui.msg( 'ooui-toolbar-more' );
    			}
    		}
    		// Check type has been registered
    		type = this.getToolGroupFactory().lookup( group.type ) ? group.type : defaultType;
    		items.push(
    			this.getToolGroupFactory().create( type, this, group )
    		);
    	}
    	this.addItems( items );
    };

    /**
     * Remove all tools and toolgroups from the toolbar.
     */
    OO.ui.Toolbar.prototype.reset = function () {
    	var i, len;

    	this.groups = [];
    	this.tools = {};
    	for ( i = 0, len = this.items.length; i < len; i++ ) {
    		this.items[ i ].destroy();
    	}
    	this.clearItems();
    };

    /**
     * Destroy the toolbar.
     *
     * Destroying the toolbar removes all event handlers and DOM elements that constitute the toolbar. Call
     * this method whenever you are done using a toolbar.
     */
    OO.ui.Toolbar.prototype.destroy = function () {
    	$( this.getElementWindow() ).off( 'resize', this.onWindowResizeHandler );
    	this.reset();
    	this.$element.remove();
    };

    /**
     * Check if the tool is available.
     *
     * Available tools are ones that have not yet been added to the toolbar.
     *
     * @param {string} name Symbolic name of tool
     * @return {boolean} Tool is available
     */
    OO.ui.Toolbar.prototype.isToolAvailable = function ( name ) {
    	return !this.tools[ name ];
    };

    /**
     * Prevent tool from being used again.
     *
     * @param {OO.ui.Tool} tool Tool to reserve
     */
    OO.ui.Toolbar.prototype.reserveTool = function ( tool ) {
    	this.tools[ tool.getName() ] = tool;
    };

    /**
     * Allow tool to be used again.
     *
     * @param {OO.ui.Tool} tool Tool to release
     */
    OO.ui.Toolbar.prototype.releaseTool = function ( tool ) {
    	delete this.tools[ tool.getName() ];
    };

    /**
     * Get accelerator label for tool.
     *
     * The OOUI library does not contain an accelerator system, but this is the hook for one. To
     * use an accelerator system, subclass the toolbar and override this method, which is meant to return a label
     * that describes the accelerator keys for the tool passed (by symbolic name) to the method.
     *
     * @param {string} name Symbolic name of tool
     * @return {string|undefined} Tool accelerator label if available
     */
    OO.ui.Toolbar.prototype.getToolAccelerator = function () {
    	return undefined;
    };