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Edit File: jquery.mmenu.pagescroll.js

/*	
 * jQuery mmenu pageScroll add-on
 * mmenu.frebsite.nl
 *
 * Copyright (c) Fred Heusschen
 */

(function( $ ) {

var _PLUGIN_ = 'mmenu',
		_ADDON_  = 'pageScroll';

$[ _PLUGIN_ ].addons[ _ADDON_ ] = {

//	setup: fired once per menu
		setup: function()
		{
			var that = this,
				opts = this.opts[ _ADDON_ ],
				conf = this.conf[ _ADDON_ ];

glbl = $[ _PLUGIN_ ].glbl;

//	Extend shorthand options
			if ( typeof opts == 'boolean' )
			{
				opts = {
					scroll: opts
				};
			}
			opts = this.opts[ _ADDON_ ] = $.extend( true, {}, $[ _PLUGIN_ ].defaults[ _ADDON_ ], opts );

if ( opts.scroll )
			{
				this.bind( 'close:finish',
					function()
					{
						scrollTo( conf.scrollOffset );
					}
				);
			}

if ( opts.update )
			{
				var that = this,
					orgs = [],
					scts = [];

that.bind(
					'initListview:after',
					function( $panel )
					{

that.__filterListItemAnchors( $panel.find( '.' + _c.listview ).children( 'li' ) )
							.each(
								function()
								{
									var href = $(this).attr( 'href' );

if ( anchorInPage( href ) )
									{
										orgs.push( href );
									}
								}
							);

scts = orgs.reverse();

}
				);

var _selected = -1;

glbl.$wndw
					.on( _e.scroll + '-' + _ADDON_,
						function( e )
						{
							var ofst = glbl.$wndw.scrollTop();

for ( var s = 0; s < scts.length; s++ )
							{
								if ( $(scts[ s ]).offset().top < ofst + conf.updateOffset )
								{
									if ( _selected !== s )
									{
										_selected = s;
										that.setSelected( 
											that.__filterListItemAnchors( 
												that.$pnls.children( '.' + _c.opened ).find( '.' + _c.listview ).children( 'li' )
											)
											.filter( '[href="' + scts[ s ] + '"]' )
											.parent()
										);
									}
									break;
								}
							}
						}
					);
			}
		},

//	add: fired once per page load
		add: function()
		{
			_c = $[ _PLUGIN_ ]._c;
			_d = $[ _PLUGIN_ ]._d;
			_e = $[ _PLUGIN_ ]._e;
		},

//	clickAnchor: prevents default behavior when clicking an anchor
		clickAnchor: function( $a, inMenu )
		{
			$section = false;

if ( !inMenu ||
				!this.opts[ _ADDON_ ].scroll ||
				!this.opts.offCanvas ||
				!glbl.$page ||
				!glbl.$page.length
			) {
				return;
			}

var href = $a.attr( 'href' );

if ( anchorInPage( href ) )
			{
				$section = $(href);
				if ( glbl.$html.hasClass( _c.mm( 'widescreen' ) ) )
				{
					scrollTo( this.conf[ _ADDON_ ].scrollOffset );
				}
			}
		}
	};

//	Default options and configuration
	$[ _PLUGIN_ ].defaults[ _ADDON_ ] = {
		scroll: false,
		update: false
	};
	$[ _PLUGIN_ ].configuration[ _ADDON_ ] = {
		scrollOffset: 0,
		updateOffset: 50
	};

var _c, _d, _e, glbl;

var $section = false;

})( jQuery );