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( function ( mw, $ ) {
'use strict';
var notification,
// The #mw-notification-area div that all notifications are contained inside.
$area,
// Number of open notification boxes at any time
openNotificationCount = 0,
isPageReady = false,
preReadyNotifQueue = [],
rAF = window.requestAnimationFrame || setTimeout;
/**
* A Notification object for 1 message.
*
* The underscore in the name is to avoid a bug <https://github.com/senchalabs/jsduck/issues/304>.
* It is not part of the actual class name.
*
* The constructor is not publicly accessible; use mw.notification#notify instead.
* This does not insert anything into the document (see #start).
*
* @class mw.Notification_
* @alternateClassName mw.Notification
* @constructor
* @private
*/
function Notification( message, options ) {
var $notification, $notificationTitle, $notificationContent;
$notification = $( '<div class="mw-notification"></div>' )
.data( 'mw.notification', this )
.addClass( options.autoHide ? 'mw-notification-autohide' : 'mw-notification-noautohide' );
if ( options.tag ) {
// Sanitize options.tag before it is used by any code. (Including Notification class methods)
options.tag = options.tag.replace( /[ _\-]+/g, '-' ).replace( /[^\-a-z0-9]+/ig, '' );
if ( options.tag ) {
$notification.addClass( 'mw-notification-tag-' + options.tag );
} else {
delete options.tag;
}
}
if ( options.type ) {
// Sanitize options.type
options.type = options.type.replace( /[ _\-]+/g, '-' ).replace( /[^\-a-z0-9]+/ig, '' );
$notification.addClass( 'mw-notification-type-' + options.type );
}
if ( options.title ) {
$notificationTitle = $( '<div class="mw-notification-title"></div>' )
.text( options.title )
.appendTo( $notification );
}
$notificationContent = $( '<div class="mw-notification-content"></div>' );
if ( typeof message === 'object' ) {
// Handle mw.Message objects separately from DOM nodes and jQuery objects
if ( message instanceof mw.Message ) {
$notificationContent.html( message.parse() );
} else {
$notificationContent.append( message );
}
} else {
$notificationContent.text( message );
}
$notificationContent.appendTo( $notification );
// Private state parameters, meant for internal use only
// isOpen: Set to true after .start() is called to avoid double calls.
// Set back to false after .close() to avoid duplicating the close animation.
// isPaused: false after .resume(), true after .pause(). Avoids duplicating or breaking the hide timeouts.
// Set to true initially so .start() can call .resume().
// message: The message passed to the notification. Unused now but may be used in the future
// to stop replacement of a tagged notification with another notification using the same message.
// options: The options passed to the notification with a little sanitization. Used by various methods.
// $notification: jQuery object containing the notification DOM node.
this.isOpen = false;
this.isPaused = true;
this.message = message;
this.options = options;
this.$notification = $notification;
}
/**
* Start the notification. Called automatically by mw.notification#notify
* (possibly asynchronously on document-ready).
*
* This inserts the notification into the page, closes any matching tagged notifications,
* handles the fadeIn animations and replacement transitions, and starts autoHide timers.
*
* @private
*/
Notification.prototype.start = function () {
var options, $notification, $tagMatches, autohideCount;
$area.show();
if ( this.isOpen ) {
return;
}
this.isOpen = true;
openNotificationCount++;
options = this.options;
$notification = this.$notification;
if ( options.tag ) {
// Find notifications with the same tag
$tagMatches = $area.find( '.mw-notification-tag-' + options.tag );
}
// If we found existing notification with the same tag, replace them
if ( options.tag && $tagMatches.length ) {
// While there can be only one "open" notif with a given tag, there can be several
// matches here because they remain in the DOM until the animation is finished.
$tagMatches.each( function () {
var notif = $( this ).data( 'mw.notification' );
if ( notif && notif.isOpen ) {
// Detach from render flow with position absolute so that the new tag can
// occupy its space instead.
notif.$notification
.css( {
position: 'absolute',
width: notif.$notification.width()
} )
.css( notif.$notification.position() )
.addClass( 'mw-notification-replaced' );
notif.close();
}
} );
$notification
.insertBefore( $tagMatches.first() )
.addClass( 'mw-notification-visible' );
} else {
$area.append( $notification );
rAF( function () {
// This frame renders the element in the area (invisible)
rAF( function () {
$notification.addClass( 'mw-notification-visible' );
} );
} );
}
// By default a notification is paused.
// If this notification is within the first {autoHideLimit} notifications then
// start the auto-hide timer as soon as it's created.
autohideCount = $area.find( '.mw-notification-autohide' ).length;
if ( autohideCount <= notification.autoHideLimit ) {
this.resume();
}
};
/**
* Pause any running auto-hide timer for this notification
*/
Notification.prototype.pause = function () {
if ( this.isPaused ) {
return;
}
this.isPaused = true;
if ( this.timeout ) {
clearTimeout( this.timeout );
delete this.timeout;
}
};
/**
* Start autoHide timer if not already started.
* Does nothing if autoHide is disabled.
* Either to resume from pause or to make the first start.
*/
Notification.prototype.resume = function () {
var notif = this;
if ( !notif.isPaused ) {
return;
}
// Start any autoHide timeouts
if ( notif.options.autoHide ) {
notif.isPaused = false;
notif.timeout = setTimeout( function () {
// Already finished, so don't try to re-clear it
delete notif.timeout;
notif.close();
}, notification.autoHideSeconds * 1000 );
}
};
/**
* Close the notification.
*/
Notification.prototype.close = function () {
var notif = this;
if ( !this.isOpen ) {
return;
}
this.isOpen = false;
openNotificationCount--;
// Clear any remaining timeout on close
this.pause();
// Remove the mw-notification-autohide class from the notification to avoid
// having a half-closed notification counted as a notification to resume
// when handling {autoHideLimit}.
this.$notification.removeClass( 'mw-notification-autohide' );
// Now that a notification is being closed. Start auto-hide timers for any
// notification that has now become one of the first {autoHideLimit} notifications.
notification.resume();
rAF( function () {
notif.$notification.removeClass( 'mw-notification-visible' );
setTimeout( function () {
if ( openNotificationCount === 0 ) {
// Hide the area after the last notification closes. Otherwise, the padding on
// the area can be obscure content, despite the area being empty/invisible (T54659). // FIXME
$area.hide();
notif.$notification.remove();
} else {
notif.$notification.slideUp( 'fast', function () {
$( this ).remove();
} );
}
}, 500 );
} );
};
/**
* Helper function, take a list of notification divs and call
* a function on the Notification instance attached to them.
*
* @private
* @static
* @param {jQuery} $notifications A jQuery object containing notification divs
* @param {string} fn The name of the function to call on the Notification instance
*/
function callEachNotification( $notifications, fn ) {
$notifications.each( function () {
var notif = $( this ).data( 'mw.notification' );
if ( notif ) {
notif[ fn ]();
}
} );
}
/**
* Initialisation.
* Must only be called once, and not before the document is ready.
*
* @ignore
*/
function init() {
var offset, $window = $( window );
$area = $( '<div id="mw-notification-area" class="mw-notification-area mw-notification-area-layout"></div>' )
// Pause auto-hide timers when the mouse is in the notification area.
.on( {
mouseenter: notification.pause,
mouseleave: notification.resume
} )
// When clicking on a notification close it.
.on( 'click', '.mw-notification', function () {
var notif = $( this ).data( 'mw.notification' );
if ( notif ) {
notif.close();
}
} )
// Stop click events from <a> tags from propogating to prevent clicking.
// on links from hiding a notification.
.on( 'click', 'a', function ( e ) {
e.stopPropagation();
} );
// Prepend the notification area to the content area and save it's object.
mw.util.$content.prepend( $area );
offset = $area.offset();
$area.hide();
function updateAreaMode() {
var isFloating = $window.scrollTop() > offset.top;
$area
.toggleClass( 'mw-notification-area-floating', isFloating )
.toggleClass( 'mw-notification-area-layout', !isFloating );
}
$window.on( 'scroll', updateAreaMode );
// Initial mode
updateAreaMode();
}
/**
* @class mw.notification
* @singleton
*/
notification = {
/**
* Pause auto-hide timers for all notifications.
* Notifications will not auto-hide until resume is called.
*
* @see mw.Notification#pause
*/
pause: function () {
callEachNotification(
$area.children( '.mw-notification' ),
'pause'
);
},
/**
* Resume any paused auto-hide timers from the beginning.
* Only the first #autoHideLimit timers will be resumed.
*/
resume: function () {
callEachNotification(
// Only call resume on the first #autoHideLimit notifications.
// Exclude noautohide notifications to avoid bugs where #autoHideLimit
// `{ autoHide: false }` notifications are at the start preventing any
// auto-hide notifications from being autohidden.
$area.children( '.mw-notification-autohide' ).slice( 0, notification.autoHideLimit ),
'resume'
);
},
/**
* Display a notification message to the user.
*
* @param {HTMLElement|HTMLElement[]|jQuery|mw.Message|string} message
* @param {Object} options The options to use for the notification.
* See #defaults for details.
* @return {mw.Notification} Notification object
*/
notify: function ( message, options ) {
var notif;
options = $.extend( {}, notification.defaults, options );
notif = new Notification( message, options );
if ( isPageReady ) {
notif.start();
} else {
preReadyNotifQueue.push( notif );
}
return notif;
},
/**
* @property {Object}
* The defaults for #notify options parameter.
*
* - autoHide:
* A boolean indicating whether the notifification should automatically
* be hidden after shown. Or if it should persist.
*
* - tag:
* An optional string. When a notification is tagged only one message
* with that tag will be displayed. Trying to display a new notification
* with the same tag as one already being displayed will cause the other
* notification to be closed and this new notification to open up inside
* the same place as the previous notification.
*
* - title:
* An optional title for the notification. Will be displayed above the
* content. Usually in bold.
*
* - type:
* An optional string for the type of the message used for styling:
* Examples: 'info', 'warn', 'error'.
*/
defaults: {
autoHide: true,
tag: false,
title: undefined,
type: false
},
/**
* @property {number}
* Number of seconds to wait before auto-hiding notifications.
*/
autoHideSeconds: 5,
/**
* @property {number}
* Maximum number of notifications to count down auto-hide timers for.
* Only the first #autoHideLimit notifications being displayed will
* auto-hide. Any notifications further down in the list will only start
* counting down to auto-hide after the first few messages have closed.
*
* This basically represents the number of notifications the user should
* be able to process in #autoHideSeconds time.
*/
autoHideLimit: 3
};
$( function () {
var notif;
init();
// Handle pre-ready queue.
isPageReady = true;
while ( preReadyNotifQueue.length ) {
notif = preReadyNotifQueue.shift();
notif.start();
}
} );
mw.notification = notification;
}( mediaWiki, jQuery ) );