# all files / src/ ToolGroup.js

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     /**
     * ToolGroups are collections of {@link OO.ui.Tool tools} that are used in a {@link OO.ui.Toolbar toolbar}.
     * The type of toolgroup ({@link OO.ui.ListToolGroup list}, {@link OO.ui.BarToolGroup bar}, or {@link OO.ui.MenuToolGroup menu})
     * to which a tool belongs determines how the tool is arranged and displayed in the toolbar. Toolgroups
     * themselves are created on demand with a {@link OO.ui.ToolGroupFactory toolgroup factory}.
     *
     * Toolgroups can contain individual tools, groups of tools, or all available tools, as specified
     * using the `include` config option. See OO.ui.ToolFactory#extract on documentation of the format.
     * The options `exclude`, `promote`, and `demote` support the same formats.
     *
     * See {@link OO.ui.Toolbar toolbars} for a full example. For more information about toolbars in general,
     * please see the [OOUI documentation on MediaWiki][1].
     *
     * [1]: https://www.mediawiki.org/wiki/OOUI/Toolbars
     *
     * @abstract
     * @class
     * @extends OO.ui.Widget
     * @mixins OO.ui.mixin.GroupElement
     *
     * @constructor
     * @param {OO.ui.Toolbar} toolbar
     * @param {Object} [config] Configuration options
     * @cfg {Array|string} [include] List of tools to include in the toolgroup, see above.
     * @cfg {Array|string} [exclude] List of tools to exclude from the toolgroup, see above.
     * @cfg {Array|string} [promote] List of tools to promote to the beginning of the toolgroup, see above.
     * @cfg {Array|string} [demote] List of tools to demote to the end of the toolgroup, see above.
     *  This setting is particularly useful when tools have been added to the toolgroup
     *  en masse (e.g., via the catch-all selector).
     */
    OO.ui.ToolGroup = function OoUiToolGroup( toolbar, config ) {
    	// Allow passing positional parameters inside the config object
    	if ( OO.isPlainObject( toolbar ) && config === undefined ) {
    		config = toolbar;
    		toolbar = config.toolbar;
    	}

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

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

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

    	// Properties
    	this.toolbar = toolbar;
    	this.tools = {};
    	this.pressed = null;
    	this.autoDisabled = false;
    	this.include = config.include || [];
    	this.exclude = config.exclude || [];
    	this.promote = config.promote || [];
    	this.demote = config.demote || [];
    	this.onCapturedMouseKeyUpHandler = this.onCapturedMouseKeyUp.bind( this );

    	// Events
    	this.$group.on( {
    		mousedown: this.onMouseKeyDown.bind( this ),
    		mouseup: this.onMouseKeyUp.bind( this ),
    		keydown: this.onMouseKeyDown.bind( this ),
    		keyup: this.onMouseKeyUp.bind( this ),
    		focus: this.onMouseOverFocus.bind( this ),
    		blur: this.onMouseOutBlur.bind( this ),
    		mouseover: this.onMouseOverFocus.bind( this ),
    		mouseout: this.onMouseOutBlur.bind( this )
    	} );
    	this.toolbar.getToolFactory().connect( this, { register: 'onToolFactoryRegister' } );
    	this.aggregate( { disable: 'itemDisable' } );
    	this.connect( this, {
    		itemDisable: 'updateDisabled',
    		disable: 'onDisable'
    	} );

    	// Initialization
    	this.$group.addClass( 'oo-ui-toolGroup-tools' );
    	this.$element
    		.addClass( 'oo-ui-toolGroup' )
    		.append( this.$group );
    	this.onDisable( this.isDisabled() );
    	this.populate();
    };

    /* Setup */

    OO.inheritClass( OO.ui.ToolGroup, OO.ui.Widget );
    OO.mixinClass( OO.ui.ToolGroup, OO.ui.mixin.GroupElement );

    /* Events */

    /**
     * @event update
     */

    /* Static Properties */

    /**
     * Show labels in tooltips.
     *
     * @static
     * @inheritable
     * @property {boolean}
     */
    OO.ui.ToolGroup.static.titleTooltips = false;

    /**
     * Show acceleration labels in tooltips.
     *
     * Note: The OOUI library does not include an accelerator system, but does contain
     * a hook for one. To use an accelerator system, subclass the {@link OO.ui.Toolbar toolbar} and
     * override the {@link OO.ui.Toolbar#getToolAccelerator getToolAccelerator} method, which is
     * meant to return a label that describes the accelerator keys for a given tool (e.g., 'Ctrl + M').
     *
     * @static
     * @inheritable
     * @property {boolean}
     */
    OO.ui.ToolGroup.static.accelTooltips = false;

    /**
     * Automatically disable the toolgroup when all tools are disabled
     *
     * @static
     * @inheritable
     * @property {boolean}
     */
    OO.ui.ToolGroup.static.autoDisable = true;

    /**
     * @abstract
     * @static
     * @inheritable
     * @property {string}
     */
    OO.ui.ToolGroup.static.name = null;

    /* Methods */

    /**
     * @inheritdoc
     */
    OO.ui.ToolGroup.prototype.isDisabled = function () {
    	return this.autoDisabled || OO.ui.ToolGroup.parent.prototype.isDisabled.apply( this, arguments );
    };

    /**
     * @inheritdoc
     */
    OO.ui.ToolGroup.prototype.updateDisabled = function () {
    	var i, item, allDisabled = true;

    	if ( this.constructor.static.autoDisable ) {
    		for ( i = this.items.length - 1; i >= 0; i-- ) {
    			item = this.items[ i ];
    			if ( !item.isDisabled() ) {
    				allDisabled = false;
    				break;
    			}
    		}
    		this.autoDisabled = allDisabled;
    	}
    	OO.ui.ToolGroup.parent.prototype.updateDisabled.apply( this, arguments );
    };

    /**
     * Handle disable events.
     *
     * @protected
     * @param {boolean} isDisabled
     */
    OO.ui.ToolGroup.prototype.onDisable = function ( isDisabled ) {
    	this.$group.toggleClass( 'oo-ui-toolGroup-disabled-tools', isDisabled );
    	this.$group.toggleClass( 'oo-ui-toolGroup-enabled-tools', !isDisabled );
    };

    /**
     * Handle mouse down and key down events.
     *
     * @protected
     * @param {jQuery.Event} e Mouse down or key down event
     */
    OO.ui.ToolGroup.prototype.onMouseKeyDown = function ( e ) {
    	if (
    		!this.isDisabled() &&
    		( e.which === OO.ui.MouseButtons.LEFT || e.which === OO.ui.Keys.SPACE || e.which === OO.ui.Keys.ENTER )
    	) {
    		this.pressed = this.findTargetTool( e );
    		if ( this.pressed ) {
    			this.pressed.setActive( true );
    			this.getElementDocument().addEventListener( 'mouseup', this.onCapturedMouseKeyUpHandler, true );
    			this.getElementDocument().addEventListener( 'keyup', this.onCapturedMouseKeyUpHandler, true );
    			return false;
    		}
    	}
    };

    /**
     * Handle captured mouse up and key up events.
     *
     * @protected
     * @param {MouseEvent|KeyboardEvent} e Mouse up or key up event
     */
    OO.ui.ToolGroup.prototype.onCapturedMouseKeyUp = function ( e ) {
    	this.getElementDocument().removeEventListener( 'mouseup', this.onCapturedMouseKeyUpHandler, true );
    	this.getElementDocument().removeEventListener( 'keyup', this.onCapturedMouseKeyUpHandler, true );
    	// onMouseKeyUp may be called a second time, depending on where the mouse is when the button is
    	// released, but since `this.pressed` will no longer be true, the second call will be ignored.
    	this.onMouseKeyUp( e );
    };

    /**
     * Handle mouse up and key up events.
     *
     * @protected
     * @param {MouseEvent|KeyboardEvent} e Mouse up or key up event
     */
    OO.ui.ToolGroup.prototype.onMouseKeyUp = function ( e ) {
    	var tool = this.findTargetTool( e );

    	if (
    		!this.isDisabled() && this.pressed && this.pressed === tool &&
    		( e.which === OO.ui.MouseButtons.LEFT || e.which === OO.ui.Keys.SPACE || e.which === OO.ui.Keys.ENTER )
    	) {
    		this.pressed.onSelect();
    		this.pressed = null;
    		e.preventDefault();
    		e.stopPropagation();
    	}

    	this.pressed = null;
    };

    /**
     * Handle mouse over and focus events.
     *
     * @protected
     * @param {jQuery.Event} e Mouse over or focus event
     */
    OO.ui.ToolGroup.prototype.onMouseOverFocus = function ( e ) {
    	var tool = this.findTargetTool( e );

    	if ( this.pressed && this.pressed === tool ) {
    		this.pressed.setActive( true );
    	}
    };

    /**
     * Handle mouse out and blur events.
     *
     * @protected
     * @param {jQuery.Event} e Mouse out or blur event
     */
    OO.ui.ToolGroup.prototype.onMouseOutBlur = function ( e ) {
    	var tool = this.findTargetTool( e );

    	if ( this.pressed && this.pressed === tool ) {
    		this.pressed.setActive( false );
    	}
    };

    /**
     * Get the closest tool to a jQuery.Event.
     *
     * Only tool links are considered, which prevents other elements in the tool such as popups from
     * triggering tool group interactions.
     *
     * @private
     * @param {jQuery.Event} e
     * @return {OO.ui.Tool|null} Tool, `null` if none was found
     */
    OO.ui.ToolGroup.prototype.findTargetTool = function ( e ) {
    	var tool,
    		$item = $( e.target ).closest( '.oo-ui-tool-link' );

    	if ( $item.length ) {
    		tool = $item.parent().data( 'oo-ui-tool' );
    	}

    	return tool && !tool.isDisabled() ? tool : null;
    };

    /**
     * Handle tool registry register events.
     *
     * If a tool is registered after the group is created, we must repopulate the list to account for:
     *
     * - a tool being added that may be included
     * - a tool already included being overridden
     *
     * @protected
     * @param {string} name Symbolic name of tool
     */
    OO.ui.ToolGroup.prototype.onToolFactoryRegister = function () {
    	this.populate();
    };

    /**
     * Get the toolbar that contains the toolgroup.
     *
     * @return {OO.ui.Toolbar} Toolbar that contains the toolgroup
     */
    OO.ui.ToolGroup.prototype.getToolbar = function () {
    	return this.toolbar;
    };

    /**
     * Add and remove tools based on configuration.
     */
    OO.ui.ToolGroup.prototype.populate = function () {
    	var i, len, name, tool,
    		toolFactory = this.toolbar.getToolFactory(),
    		names = {},
    		add = [],
    		remove = [],
    		list = this.toolbar.getToolFactory().getTools(
    			this.include, this.exclude, this.promote, this.demote
    		);

    	// Build a list of needed tools
    	for ( i = 0, len = list.length; i < len; i++ ) {
    		name = list[ i ];
    		if (
    			// Tool exists
    			toolFactory.lookup( name ) &&
    			// Tool is available or is already in this group
    			( this.toolbar.isToolAvailable( name ) || this.tools[ name ] )
    		) {
    			// Hack to prevent infinite recursion via ToolGroupTool. We need to reserve the tool before
    			// creating it, but we can't call reserveTool() yet because we haven't created the tool.
    			this.toolbar.tools[ name ] = true;
    			tool = this.tools[ name ];
    			if ( !tool ) {
    				// Auto-initialize tools on first use
    				this.tools[ name ] = tool = toolFactory.create( name, this );
    				tool.updateTitle();
    			}
    			this.toolbar.reserveTool( tool );
    			add.push( tool );
    			names[ name ] = true;
    		}
    	}
    	// Remove tools that are no longer needed
    	for ( name in this.tools ) {
    		if ( !names[ name ] ) {
    			this.tools[ name ].destroy();
    			this.toolbar.releaseTool( this.tools[ name ] );
    			remove.push( this.tools[ name ] );
    			delete this.tools[ name ];
    		}
    	}
    	if ( remove.length ) {
    		this.removeItems( remove );
    	}
    	// Update emptiness state
    	if ( add.length ) {
    		this.$element.removeClass( 'oo-ui-toolGroup-empty' );
    	} else {
    		this.$element.addClass( 'oo-ui-toolGroup-empty' );
    	}
    	// Re-add tools (moving existing ones to new locations)
    	this.addItems( add );
    	// Disabled state may depend on items
    	this.updateDisabled();
    };

    /**
     * Destroy toolgroup.
     */
    OO.ui.ToolGroup.prototype.destroy = function () {
    	var name;

    	this.clearItems();
    	this.toolbar.getToolFactory().disconnect( this );
    	for ( name in this.tools ) {
    		this.toolbar.releaseTool( this.tools[ name ] );
    		this.tools[ name ].disconnect( this ).destroy();
    		delete this.tools[ name ];
    	}
    	this.$element.remove();
    };