# all files / src/dialogs/ MessageDialog.js

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     /**
     * MessageDialogs display a confirmation or alert message. By default, the rendered dialog box
     * consists of a header that contains the dialog title, a body with the message, and a footer that
     * contains any {@link OO.ui.ActionWidget action widgets}. The MessageDialog class is the only type
     * of {@link OO.ui.Dialog dialog} that is usually instantiated directly.
     *
     * There are two basic types of message dialogs, confirmation and alert:
     *
     * - **confirmation**: the dialog title describes what a progressive action will do and the message provides
     *  more details about the consequences.
     * - **alert**: the dialog title describes which event occurred and the message provides more information
     *  about why the event occurred.
     *
     * The MessageDialog class specifies two actions: ‘accept’, the primary
     * action (e.g., ‘ok’) and ‘reject,’ the safe action (e.g., ‘cancel’). Both will close the window,
     * passing along the selected action.
     *
     * For more information and examples, please see the [OOjs UI documentation on MediaWiki][1].
     *
     *     @example
     *     // Example: Creating and opening a message dialog window.
     *     var messageDialog = new OO.ui.MessageDialog();
     *
     *     // Create and append a window manager.
     *     var windowManager = new OO.ui.WindowManager();
     *     $( 'body' ).append( windowManager.$element );
     *     windowManager.addWindows( [ messageDialog ] );
     *     // Open the window.
     *     windowManager.openWindow( messageDialog, {
     *         title: 'Basic message dialog',
     *         message: 'This is the message'
     *     } );
     *
     * [1]: https://www.mediawiki.org/wiki/OOjs_UI/Windows/Message_Dialogs
     *
     * @class
     * @extends OO.ui.Dialog
     *
     * @constructor
     * @param {Object} [config] Configuration options
     */
    OO.ui.MessageDialog = function OoUiMessageDialog( config ) {
    	// Parent constructor
    	OO.ui.MessageDialog.parent.call( this, config );

    	// Properties
    	this.verticalActionLayout = null;

    	// Initialization
    	this.$element.addClass( 'oo-ui-messageDialog' );
    };

    /* Setup */

    OO.inheritClass( OO.ui.MessageDialog, OO.ui.Dialog );

    /* Static Properties */

    /**
     * @static
     * @inheritdoc
     */
    OO.ui.MessageDialog.static.name = 'message';

    /**
     * @static
     * @inheritdoc
     */
    OO.ui.MessageDialog.static.size = 'small';

    /**
     * Dialog title.
     *
     * The title of a confirmation dialog describes what a progressive action will do. The
     * title of an alert dialog describes which event occurred.
     *
     * @static
     * @inheritable
     * @property {jQuery|string|Function|null}
     */
    OO.ui.MessageDialog.static.title = null;

    /**
     * The message displayed in the dialog body.
     *
     * A confirmation message describes the consequences of a progressive action. An alert
     * message describes why an event occurred.
     *
     * @static
     * @inheritable
     * @property {jQuery|string|Function|null}
     */
    OO.ui.MessageDialog.static.message = null;

    /**
     * @static
     * @inheritdoc
     */
    OO.ui.MessageDialog.static.actions = [
    	// Note that OO.ui.alert() and OO.ui.confirm() rely on these.
    	{ action: 'accept', label: OO.ui.deferMsg( 'ooui-dialog-message-accept' ), flags: 'primary' },
    	{ action: 'reject', label: OO.ui.deferMsg( 'ooui-dialog-message-reject' ), flags: 'safe' }
    ];

    /* Methods */

    /**
     * @inheritdoc
     */
    OO.ui.MessageDialog.prototype.setManager = function ( manager ) {
    	OO.ui.MessageDialog.parent.prototype.setManager.call( this, manager );

    	// Events
    	this.manager.connect( this, {
    		resize: 'onResize'
    	} );

    	return this;
    };

    /**
     * Handle window resized events.
     *
     * @private
     */
    OO.ui.MessageDialog.prototype.onResize = function () {
    	var dialog = this;
    	dialog.fitActions();
    	// Wait for CSS transition to finish and do it again :(
    	setTimeout( function () {
    		dialog.fitActions();
    	}, 300 );
    };

    /**
     * Toggle action layout between vertical and horizontal.
     *
     * @private
     * @param {boolean} [value] Layout actions vertically, omit to toggle
     * @chainable
     */
    OO.ui.MessageDialog.prototype.toggleVerticalActionLayout = function ( value ) {
    	value = value === undefined ? !this.verticalActionLayout : !!value;

    	if ( value !== this.verticalActionLayout ) {
    		this.verticalActionLayout = value;
    		this.$actions
    			.toggleClass( 'oo-ui-messageDialog-actions-vertical', value )
    			.toggleClass( 'oo-ui-messageDialog-actions-horizontal', !value );
    	}

    	return this;
    };

    /**
     * @inheritdoc
     */
    OO.ui.MessageDialog.prototype.getActionProcess = function ( action ) {
    	Eif ( action ) {
    		return new OO.ui.Process( function () {
    			this.close( { action: action } );
    		}, this );
    	}
    	return OO.ui.MessageDialog.parent.prototype.getActionProcess.call( this, action );
    };

    /**
     * @inheritdoc
     *
     * @param {Object} [data] Dialog opening data
     * @param {jQuery|string|Function|null} [data.title] Description of the action being confirmed
     * @param {jQuery|string|Function|null} [data.message] Description of the action's consequence
     * @param {string} [data.size] Symbolic name of the dialog size, see OO.ui.Window
     * @param {Object[]} [data.actions] List of OO.ui.ActionOptionWidget configuration options for each
     *   action item
     */
    OO.ui.MessageDialog.prototype.getSetupProcess = function ( data ) {
    	data = data || {};

    	// Parent method
    	return OO.ui.MessageDialog.parent.prototype.getSetupProcess.call( this, data )
    		.next( function () {
    			this.title.setLabel(
    				data.title !== undefined ? data.title : this.constructor.static.title
    			);
    			this.message.setLabel(
    				data.message !== undefined ? data.message : this.constructor.static.message
    			);
    			this.size = data.size !== undefined ? data.size : this.constructor.static.size;
    		}, this );
    };

    /**
     * @inheritdoc
     */
    OO.ui.MessageDialog.prototype.getReadyProcess = function ( data ) {
    	data = data || {};

    	// Parent method
    	return OO.ui.MessageDialog.parent.prototype.getReadyProcess.call( this, data )
    		.next( function () {
    			// Focus the primary action button
    			var actions = this.actions.get();
    			actions = actions.filter( function ( action ) {
    				return action.getFlags().indexOf( 'primary' ) > -1;
    			} );
    			Eif ( actions.length > 0 ) {
    				actions[ 0 ].focus();
    			}
    		}, this );
    };

    /**
     * @inheritdoc
     */
    OO.ui.MessageDialog.prototype.getBodyHeight = function () {
    	var bodyHeight, oldOverflow,
    		$scrollable = this.container.$element;

    	oldOverflow = $scrollable[ 0 ].style.overflow;
    	$scrollable[ 0 ].style.overflow = 'hidden';

    	OO.ui.Element.static.reconsiderScrollbars( $scrollable[ 0 ] );

    	bodyHeight = this.text.$element.outerHeight( true );
    	$scrollable[ 0 ].style.overflow = oldOverflow;

    	return bodyHeight;
    };

    /**
     * @inheritdoc
     */
    OO.ui.MessageDialog.prototype.setDimensions = function ( dim ) {
    	var $scrollable = this.container.$element;
    	OO.ui.MessageDialog.parent.prototype.setDimensions.call( this, dim );

    	// Twiddle the overflow property, otherwise an unnecessary scrollbar will be produced.
    	// Need to do it after transition completes (250ms), add 50ms just in case.
    	setTimeout( function () {
    		var oldOverflow = $scrollable[ 0 ].style.overflow,
    			activeElement = document.activeElement;

    		$scrollable[ 0 ].style.overflow = 'hidden';

    		OO.ui.Element.static.reconsiderScrollbars( $scrollable[ 0 ] );

    		// Check reconsiderScrollbars didn't destroy our focus, as we
    		// are doing this after the ready process.
    		Iif ( activeElement && activeElement !== document.activeElement && activeElement.focus ) {
    			activeElement.focus();
    		}

    		$scrollable[ 0 ].style.overflow = oldOverflow;
    	}, 300 );

    	return this;
    };

    /**
     * @inheritdoc
     */
    OO.ui.MessageDialog.prototype.initialize = function () {
    	// Parent method
    	OO.ui.MessageDialog.parent.prototype.initialize.call( this );

    	// Properties
    	this.$actions = $( '<div>' );
    	this.container = new OO.ui.PanelLayout( {
    		scrollable: true, classes: [ 'oo-ui-messageDialog-container' ]
    	} );
    	this.text = new OO.ui.PanelLayout( {
    		padded: true, expanded: false, classes: [ 'oo-ui-messageDialog-text' ]
    	} );
    	this.message = new OO.ui.LabelWidget( {
    		classes: [ 'oo-ui-messageDialog-message' ]
    	} );

    	// Initialization
    	this.title.$element.addClass( 'oo-ui-messageDialog-title' );
    	this.$content.addClass( 'oo-ui-messageDialog-content' );
    	this.container.$element.append( this.text.$element );
    	this.text.$element.append( this.title.$element, this.message.$element );
    	this.$body.append( this.container.$element );
    	this.$actions.addClass( 'oo-ui-messageDialog-actions' );
    	this.$foot.append( this.$actions );
    };

    /**
     * @inheritdoc
     */
    OO.ui.MessageDialog.prototype.attachActions = function () {
    	var i, len, other, special, others;

    	// Parent method
    	OO.ui.MessageDialog.parent.prototype.attachActions.call( this );

    	special = this.actions.getSpecial();
    	others = this.actions.getOthers();

    	if ( special.safe ) {
    		this.$actions.append( special.safe.$element );
    		special.safe.toggleFramed( false );
    	}
    	Iif ( others.length ) {
    		for ( i = 0, len = others.length; i < len; i++ ) {
    			other = others[ i ];
    			this.$actions.append( other.$element );
    			other.toggleFramed( false );
    		}
    	}
    	Eif ( special.primary ) {
    		this.$actions.append( special.primary.$element );
    		special.primary.toggleFramed( false );
    	}

    	Iif ( !this.isOpening() ) {
    		// If the dialog is currently opening, this will be called automatically soon.
    		// This also calls #fitActions.
    		this.updateSize();
    	}
    };

    /**
     * Fit action actions into columns or rows.
     *
     * Columns will be used if all labels can fit without overflow, otherwise rows will be used.
     *
     * @private
     */
    OO.ui.MessageDialog.prototype.fitActions = function () {
    	var i, len, action,
    		previous = this.verticalActionLayout,
    		actions = this.actions.get();

    	// Detect clipping
    	this.toggleVerticalActionLayout( false );
    	for ( i = 0, len = actions.length; i < len; i++ ) {
    		action = actions[ i ];
    		Iif ( action.$element.innerWidth() < action.$label.outerWidth( true ) ) {
    			this.toggleVerticalActionLayout( true );
    			break;
    		}
    	}

    	// Move the body out of the way of the foot
    	this.$body.css( 'bottom', this.$foot.outerHeight( true ) );

    	if ( this.verticalActionLayout !== previous ) {
    		// We changed the layout, window height might need to be updated.
    		this.updateSize();
    	}
    };