text: /**
   * Button for marking all changes as seen on the Watchlist
   *
   * @class mw.rcfilters.ui.MarkSeenButtonWidget
   * @extends OO.ui.ButtonWidget
   *
   * @constructor
   * @param {mw.rcfilters.Controller} controller
   * @param {mw.rcfilters.dm.ChangesListViewModel} model Changes list view model
   * @param {Object} [config] Configuration object
   */
  var MarkSeenButtonWidget = function MwRcfiltersUiMarkSeenButtonWidget( controller, model, config ) {
  	config = config || {};
  
  	// Parent
  	MarkSeenButtonWidget.parent.call( this, $.extend( {
  		label: mw.message( 'rcfilters-watchlist-markseen-button' ).text(),
  		icon: 'checkAll'
  	}, config ) );
  
  	this.controller = controller;
  	this.model = model;
  
  	// Events
  	this.connect( this, { click: 'onClick' } );
  	this.model.connect( this, { update: 'onModelUpdate' } );
  
  	this.$element.addClass( 'mw-rcfilters-ui-markSeenButtonWidget' );
  
  	this.onModelUpdate();
  };
  
  /* Initialization */
  
  OO.inheritClass( MarkSeenButtonWidget, OO.ui.ButtonWidget );
  
  /* Methods */
  
  /**
   * Respond to the button being clicked
   */
  MarkSeenButtonWidget.prototype.onClick = function () {
  	this.controller.markAllChangesAsSeen();
  	// assume there's no more unseen changes until the next model update
  	this.setDisabled( true );
  };
  
  /**
   * Respond to the model being updated with new changes
   */
  MarkSeenButtonWidget.prototype.onModelUpdate = function () {
  	this.setDisabled( !this.model.hasUnseenWatchedChanges() );
  };
  
  module.exports = MarkSeenButtonWidget;
  