//
//
// Editited  2009 by Jonathan Krusy <krusy@netzfactor.de>.
// netzfactor GmbH
//
//	-	German Text!
//
// 	-	Needs Mootools
//	-	Need an object with ID: detail 
//	 	to display Cluster Details
//
// Clusterer.js - marker clustering routines for Google Maps apps
//  
//
// Using these routines is very easy.
//
// 1) Load the routines into your code:
//
//        <script src="http://www.acme.com/javascript/Clusterer.js" type="text/javascript"></script>
//
// 2) Create a Clusterer object, passing it your map object:
//
//        var clusterer = new Clusterer( map );
//
// 3) Wherever you now do map.addOverlay( marker ), instead call
//    clusterer.AddMarker( marker, title ).  The title is just a
//    short descriptive string to use in the cluster info-boxes.
//
// 4) If you are doing any map.removeOverlay( marker ) calls, change those
//    to clusterer.RemoveMarker( marker ).
//
// That's it!  Everything else happens automatically.
//
//
// The current version of this code is always available at:
// http://www.acme.com/javascript/
//
//
// Copyright © 2005,2006 by Jef Poskanzer <jef@mail.acme.com>.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
//
// For commentary on this license please see http://www.acme.com/license.html
//
// ------------------------------------------------------------------------------------
//

// Constructor.
Clusterer = function ( map )
    {
    this.map = map;
    this.markers = [];
    this.clusters = [];
    this.timeout = null;
    this.currentZoomLevel = map.getZoom();

    this.maxVisibleMarkers = Clusterer.defaultMaxVisibleMarkers;
    this.gridSize = Clusterer.defaultGridSize;
    this.minMarkersPerCluster = Clusterer.defaultMinMarkersPerCluster;
    this.maxLinesPerInfoBox = Clusterer.defaultMaxLinesPerInfoBox;
    this.icon = Clusterer.defaultIcon;

    GEvent.addListener( map, 'zoomend', Clusterer.MakeCaller( Clusterer.Display, this ) );
    GEvent.addListener( map, 'moveend', Clusterer.MakeCaller( Clusterer.Display, this ) );
    GEvent.addListener( map, 'infowindowclose', Clusterer.MakeCaller( Clusterer.PopDown, this ) );
    };


Clusterer.defaultMaxVisibleMarkers = 20;
Clusterer.defaultGridSize = 5;
Clusterer.defaultMinMarkersPerCluster = 3;
Clusterer.defaultMaxLinesPerInfoBox = 8;

Clusterer.defaultIcon = new GIcon();
Clusterer.defaultIcon.image = 'http://www.acme.com/resources/images/markers/blue_large.PNG';
Clusterer.defaultIcon.shadow = 'http://www.acme.com/resources/images/markers/shadow_large.PNG';
Clusterer.defaultIcon.iconSize = new GSize( 30, 51 );
Clusterer.defaultIcon.shadowSize = new GSize( 56, 51 );
Clusterer.defaultIcon.iconAnchor = new GPoint( 13, 34 );
Clusterer.defaultIcon.infoWindowAnchor = new GPoint( 13, 3 );
Clusterer.defaultIcon.infoShadowAnchor = new GPoint( 27, 37 );


// Call this to change the cluster icon.
Clusterer.prototype.SetIcon = function ( icon )
    {
    this.icon = icon;
    };


// NF Sets the marker-Array
Clusterer.prototype.SetMarkers = function ( markers )
    {
    this.markers = markers;
    }

// Changes the maximum number of visible markers before clustering kicks in.
Clusterer.prototype.SetMaxVisibleMarkers = function ( n )
    {
    this.maxVisibleMarkers = n;
    };


// Sets the minumum number of markers for a cluster.
Clusterer.prototype.SetMinMarkersPerCluster = function ( n )
    {
    this.minMarkersPerCluster = n;
    };


// Sets the maximum number of lines in an info box.
Clusterer.prototype.SetMaxLinesPerInfoBox = function ( n )
    {
    this.maxLinesPerInfoBox = n;
    };


// Call this to add a marker.
Clusterer.prototype.AddMarker = function ( marker, title )
    {
    if ( marker.setMap != null )
	marker.setMap( this.map );

    marker.title = title;
    marker.onMap = false;
    //dropMarker(marker,400);
    this.markers.push( marker );
    this.DisplayLater();
    };


Clusterer.prototype.HideMarker = function ( marker ) {
	marker.onMap = false;
	this.DisplayLater();
}

// Call this to remove a marker.
Clusterer.prototype.RemoveMarker = function ( marker ) {
	//Durchlaufe alle Marker
	for ( var i = 0; i < this.markers.length; ++i )
		//Wenn der durchlaufene Marker dem übergebenem Marker entspricht...
		if ( this.markers[i] == marker ) {
			//... und auf der Karte ist...
	   	if ( marker.onMap )
	   		//... lösche den Marker!
				this.map.removeOverlay( marker );
				
			// Durchlaufe alle Cluster
	   	for ( var j = 0; j < this.clusters.length; ++j ) {
				var cluster = this.clusters[j];
				
				// Wenn Cluster gesetzt...
				if ( cluster != null ) {
					
					// ...durchlaufe die Marker des Clusters
	    		for ( var k = 0; k < cluster.markers.length; ++k ) {
	    		
	    			// Wenn der durchlaufene Marker dem übergebenem Marker entspricht...
						if ( cluster.markers[k] == marker ) {
							
							// Setze den Marker auf null
		    			cluster.markers[k] = null;
		    			--cluster.markerCount;
		    			
		    			//John:
		    			cluster.markers.splice(k, 1);

		    			break;
		    		}
		    	} // End Cluster-Marker-Schleife
		    	
		    	// Wenn keine Marker vorhanden sind...
		   		if ( cluster.markerCount == 0 )	{
		   			// cleare diesen Cluster
						this.ClearCluster( cluster );
						this.clusters[j] = null;
					} else if ( cluster == this.poppedUpCluster )
						Clusterer.RePop( this );
		   	}
			} // End Cluster-Schleife
	   	this.markers[i] = null;
	   	
	   	//John:
	   	this.markers.splice(i,1);
	   	break;
	   }
	this.DisplayLater();
};


Clusterer.prototype.DisplayLater = function ()
    {
    if ( this.timeout != null )
	clearTimeout( this.timeout );
    this.timeout = setTimeout( Clusterer.MakeCaller( Clusterer.Display, this ), 500 );
    };


Clusterer.Display = function ( clusterer ) {
	var i, j, marker, cluster;

  clearTimeout( clusterer.timeout );

  var newZoomLevel = clusterer.map.getZoom();
  if ( newZoomLevel != clusterer.currentZoomLevel )	{
		// When the zoom level changes, we have to remove all the clusters.
		for ( i = 0; i < clusterer.clusters.length; ++i ) {
	    if ( clusterer.clusters[i] != null ) {
				clusterer.ClearCluster( clusterer.clusters[i] );
				clusterer.clusters[i] = null;
			}
		}
		clusterer.clusters.length = 0;
		clusterer.currentZoomLevel = newZoomLevel;
	}

  // Get the current bounds of the visible area.
  var bounds = clusterer.map.getBounds();

  // Expand the bounds a little, so things look smoother when scrolling
  // by small amounts.
  var sw = bounds.getSouthWest();
  var ne = bounds.getNorthEast();
  var dx = ne.lng() - sw.lng();
  var dy = ne.lat() - sw.lat();
  if ( dx < 300 && dy < 150 ) {
		dx *= 0.10;
		dy *= 0.10;
		bounds = new GLatLngBounds(
	  	new GLatLng( sw.lat() - dy, sw.lng() - dx ),
	  	new GLatLng( ne.lat() + dy, ne.lng() + dx ) );
	}

  // Partition the markers into visible and non-visible lists.
  var visibleMarkers = [];
  var nonvisibleMarkers = [];
  
  //NF build new...
  clusterer.markers.each(function(marker) {
  	//alert(marker);
   	if ( marker != null ) {
	   	if ( bounds.contains( marker.getPoint() ) ) {
				visibleMarkers.push( marker );
			} else {
				nonvisibleMarkers.push( marker );
			}
		}
  });
    
  // OLD - REMOVED BY JOHN
  /*for ( i = 0; i < clusterer.markers.length; ++i ){
			marker = clusterer.markers[i];
			if ( marker != null ) {
		    if ( bounds.contains( marker.getPoint() ) ) {
					visibleMarkers.push( marker );
			  } else {
					nonvisibleMarkers.push( marker );
				}
			}
		}*/

  // Take down the non-visible markers.
 	nonvisibleMarkers.each(function(marker) {
		if ( marker.onMap ) {
	    clusterer.map.removeOverlay( marker );
	    marker.onMap = false;
		}
	});

  // OLD - REMOVED BY JOHN
  /*for ( i = 0; i < nonvisibleMarkers.length; ++i ) {
			marker = nonvisibleMarkers[i];
			if ( marker.onMap ) {
	 	 		clusterer.map.removeOverlay( marker );
	 	 		marker.onMap = false;
	 	 	}
		}*/

  // Take down the non-visible clusters.
	clusterer.clusters.each(function(marker) {
		if ( cluster != null && ! bounds.contains( cluster.marker.getPoint() ) && cluster.onMap ) {
			clusterer.map.removeOverlay( cluster.marker );
			cluster.onMap = false;
	  }			
	});

	// OLD - REMOVED BY JOHN
  /*for ( i = 0; i < clusterer.clusters.length; ++i ) {
			cluster = clusterer.clusters[i];
			if ( cluster != null && ! bounds.contains( cluster.marker.getPoint() ) && cluster.onMap ) {
	   		clusterer.map.removeOverlay( cluster.marker );
	   		cluster.onMap = false;
	   	}
		}*/

  // Clustering!  This is some complicated stuff.  We have three goals
  // here.  One, limit the number of markers & clusters displayed, so the
  // maps code doesn't slow to a crawl.  Two, when possible keep existing
  // clusters instead of replacing them with new ones, so that the app pans
  // better.  And three, of course, be CPU and memory efficient.
  if ( visibleMarkers.length > clusterer.maxVisibleMarkers ) {
		// Add to the list of clusters by splitting up the current bounds
		// into a grid.
		var latRange = bounds.getNorthEast().lat() - bounds.getSouthWest().lat();
		var latInc = latRange / clusterer.gridSize;
		var lngInc = latInc / Math.cos( ( bounds.getNorthEast().lat() + bounds.getSouthWest().lat() ) / 2.0 * Math.PI / 180.0 );
		for ( var lat = bounds.getSouthWest().lat(); lat <= bounds.getNorthEast().lat(); lat += latInc ) {
	   	for ( var lng = bounds.getSouthWest().lng(); lng <= bounds.getNorthEast().lng(); lng += lngInc ) {
				cluster = new Object();
				cluster.clusterer = clusterer;
				cluster.bounds = new GLatLngBounds( new GLatLng( lat, lng ), new GLatLng( lat + latInc, lng + lngInc ) );
				cluster.markers = [];
				cluster.markerCount = 0;
				cluster.onMap = false;
				cluster.marker = null;
				clusterer.clusters.push( cluster );
			}
		}

		// Put all the unclustered visible markers into a cluster - the first
		// one it fits in, which favors pre-existing clusters.
		var ghj = "";
		visibleMarkers.each(function(marker) {
			
			if ( marker != null && ! marker.inCluster )	{
				
				clusterer.clusters.each(function(cluster) {
				/*for ( j = 0; j < clusterer.clusters.length; ++j ) {
		    	cluster = clusterer.clusters[j];*/
		    	if ( cluster != null && cluster.bounds.contains( marker.getPoint() ) ) {
	    			ghj += ".";
						cluster.markers.push( marker );
						++cluster.markerCount;
						marker.inCluster = true;
					}
		    //}
		  	});
			}
		});
		
		// OLD - REMOVED BY JOHN
		/*for ( i = 0; i < visibleMarkers.length; ++i ) {
	  	marker = visibleMarkers[i];
	    if ( marker != null && ! marker.inCluster )	{
				for ( j = 0; j < clusterer.clusters.length; ++j ) {
		    	cluster = clusterer.clusters[j];
		    	if ( cluster != null && cluster.bounds.contains( marker.getPoint() ) ) {
						cluster.markers.push( marker );
						++cluster.markerCount;
						marker.inCluster = true;
					}
		    }
			}
	  }*/

		// Get rid of any clusters containing only a few markers.
		
		for ( i = 0; i < clusterer.clusters.length; ++i ) {
	    if ( clusterer.clusters[i] != null && clusterer.clusters[i].markerCount < clusterer.minMarkersPerCluster ) {
				clusterer.ClearCluster( clusterer.clusters[i] );
				clusterer.clusters[i] = null;
			}
		}

		// Shrink the clusters list.
		for ( i = clusterer.clusters.length - 1; i >= 0; --i ) {
	    if ( clusterer.clusters[i] != null ) {
				break;
	    } else {
				--clusterer.clusters.length;
			}
		}

		// Ok, we have our clusters.  Go through the markers in each
		// cluster and remove them from the map if they are currently up.
		for ( i = 0; i < clusterer.clusters.length; ++i ) {
	    cluster = clusterer.clusters[i];
	    if ( cluster != null ) {
				for ( j = 0; j < cluster.markers.length; ++j ){
		    	marker = cluster.markers[j];
		    	if ( marker != null && marker.onMap ) {
						clusterer.map.removeOverlay( marker );
						marker.onMap = false;
					}
		    }
			}
	  }

		// Now make cluster-markers for any clusters that need one.
		for ( i = 0; i < clusterer.clusters.length; ++i ) {
	    cluster = clusterer.clusters[i];
	    if ( cluster != null && cluster.marker == null ) {
				// Figure out the average coordinates of the markers in this
				// cluster.
				var xTotal = 0.0, yTotal = 0.0;
				for ( j = 0; j < cluster.markers.length; ++j ) {
		    	marker = cluster.markers[j];
		    	if ( marker != null ) {
						xTotal += ( + marker.getPoint().lng() );
						yTotal += ( + marker.getPoint().lat() );
					}
		    }
		    
				var location = new GLatLng( yTotal / cluster.markerCount, xTotal / cluster.markerCount );
				marker = new GMarker( location, { icon: clusterer.icon } );
				//dropMarker(marker, 10);
				cluster.marker = marker;
				GEvent.addListener( marker, 'click', Clusterer.MakeCaller( Clusterer.ZoomCluster, cluster ) );
				GEvent.addListener( marker, 'mouseover', Clusterer.MakeCaller( Clusterer.PopUp, cluster ) );

				GEvent.addListener(marker, 'dblclick', function(){
					var bounds = new GLatLngBounds();
					bounds.extend(marker.getLatLng());
					map.panTo(bounds.getCenter());
					map.zoomIn();		
				});
			}
	  }
	}

  // Display the visible markers not already up and not in clusters.
  for ( i = 0; i < visibleMarkers.length; ++i ) {
		marker = visibleMarkers[i];
		if ( marker != null && ! marker.onMap && ! marker.inCluster ) {
	 		clusterer.map.addOverlay( marker );
	    if ( marker.addedToMap != null ) {
				marker.addedToMap();
			}
	    marker.onMap = true;
	  }
	}

  // Display the visible clusters not already up.
  clusterer.clusters.each(function(cluster){
  	if ( cluster != null && ! cluster.onMap && bounds.contains( cluster.marker.getPoint() ) ) {
	  	clusterer.map.addOverlay( cluster.marker );
	    cluster.onMap = true;
	  }
  });
  
  /*for ( i = 0; i < clusterer.clusters.length; ++i ) {
		cluster = clusterer.clusters[i];
		if ( cluster != null && ! cluster.onMap && bounds.contains( cluster.marker.getPoint() ) ) {
	  	clusterer.map.addOverlay( cluster.marker );
	    cluster.onMap = true;
	  }
	}*/

  // In case a cluster is currently popped-up, re-pop to get any new
  // markers into the infobox.
  Clusterer.RePop( clusterer );
  
};

Clusterer.ZoomCluster = function ( cluster )
	{
		var myBounds = new GLatLngBounds();
		for ( var i = 0; i < cluster.markers.length; ++i ){
			var marker = cluster.markers[i];
			if ( marker != null ) {
				myBounds.extend(marker.getLatLng());
			}
		}
		map.setCenter(new GLatLng(myBounds.getCenter().lat(), myBounds.getCenter().lng()), map.getZoom()+1);
	};


Clusterer.PopUp = function ( cluster )
    {
    var clusterer = cluster.clusterer;
    var html = '<table width="100%">';
    var n = 0;
    var myBounds = new GLatLngBounds();
    var prids="";
    for ( var i = 0; i < cluster.markers.length; ++i ){
			var marker = cluster.markers[i];
			if ( marker != null ) {
				prids += marker.prid+",";
				myBounds.extend(marker.getLatLng());
				++n;
			  html += '<tr><td>';
			  if ( marker.getIcon().smallImage != null ) {
					html += '<img src="' + marker.getIcon().smallImage + '">';
				} else {
					html += '<img src="' + marker.getIcon().image + '" width="' + ( marker.getIcon().iconSize.width / 2 ) + '" height="' + ( marker.getIcon().iconSize.height / 2 ) + '">';
				}
			  html += '</td><td><a href="/profildetail.html?prid='+marker.prid+'">' + marker.title + '</a></td></tr>';
			  if ( n == clusterer.maxLinesPerInfoBox - 1 && cluster.markerCount > clusterer.maxLinesPerInfoBox  ) {
			  	
			  	for(var kk = n; kk < cluster.markers.length; ++kk) {
			  		var marker2 = cluster.markers[kk];
			  		if(marker2 != null) {
			  			prids += marker2.prid +",";
			  			myBounds.extend(marker2.getLatLng());
			  		}
			  	}
					html += '<tr><td colspan="2"><a href="#reloadMap" onClick="map.setCenter(new GLatLng'+myBounds.getCenter()+', '+map.getBoundsZoomLevel(myBounds)+'); return false;">...und ' + ( cluster.markerCount - n ) + ' weitere</a></td></tr>';
					$('detail').set("html", html);
					break;
				}
			}
		}
    html += '</table>';
    $('detail').set("html", html);
    clusterer.map.closeInfoWindow();
    //cluster.marker.openInfoWindowHtml( html );
    clusterer.poppedUpCluster = cluster;
    };


Clusterer.RePop = function ( clusterer )
    {
    if ( clusterer.poppedUpCluster != null )
	Clusterer.PopUp( clusterer.poppedUpCluster );
    };


Clusterer.PopDown = function ( clusterer )
    {
    clusterer.poppedUpCluster = null;
    };


Clusterer.prototype.ClearCluster = function ( cluster )
    {
    var i, marker;

    for ( i = 0; i < cluster.markers.length; ++i )
	if ( cluster.markers[i] != null )
	    {
	    cluster.markers[i].inCluster = false;
	    cluster.markers[i] = null;
	    }
    cluster.markers.length = 0;
    cluster.markerCount = 0;
    if ( cluster == this.poppedUpCluster )
	this.map.closeInfoWindow();
    if ( cluster.onMap )
	{
	this.map.removeOverlay( cluster.marker );
	cluster.onMap = false;
	}
    };

Clusterer.prototype.nfClearCluster = function ()
    {
    var i, marker;

    for ( i = 0; i < this.markers.length; ++i )
	if ( this.markers[i] != null )
	    {
	    this.markers[i].inCluster = false;
	    this.markers[i] = null;
	    }
    this.markers.length = 0;
    this.markerCount = 0;
    if ( this == this.poppedUpCluster )
	this.map.closeInfoWindow();
    if ( this.onMap )
	{
	this.map.removeOverlay( this.marker );
	this.onMap = false;
	}
    };

// nf Clears all non-displayed markers
Clusterer.prototype.ClearNonDisplayed = function ( cluster ) {
	var bounds = this.map.getBounds();
  var i, j, marker;
	j = 0;
	alert(bounds.minX);
  for ( i = 0; i < cluster.markers.length; ++i )
		if ( cluster.markers[i] != null && !bounds.containsPoint(cluster.markers[i].getPoint())) {
	  	++j;
	  	cluster.markers[i].inCluster = false;
	    cluster.markers[i] = null;
	  }
  this.markers.length = i + 1 - j;
  this.markerCount = i + 1 - j;
  if ( cluster == this.poppedUpCluster )
		this.map.closeInfoWindow();
  if ( cluster.onMap ) {
		this.map.removeOverlay( this.marker );
		this.onMap = false;
	}
};


// This returns a function closure that calls the given routine with the
// specified arg.
Clusterer.MakeCaller = function ( func, arg )
    {
    return function () { func( arg ); };
    };


// Augment GMarker so it handles markers that have been created but
// not yet addOverlayed.

GMarker.prototype.setMap = function ( map )
    {
    this.map = map;
    };

GMarker.prototype.addedToMap = function ()
    {
    this.map = null;
    };

GMarker.prototype.origOpenInfoWindow = GMarker.prototype.openInfoWindow;
GMarker.prototype.openInfoWindow = function ( node, opts )
    {
    if ( this.map != null )
	return this.map.openInfoWindow( this.getPoint(), node, opts );
    else
	return this.origOpenInfoWindow( node, opts );
    };

GMarker.prototype.origOpenInfoWindowHtml = GMarker.prototype.openInfoWindowHtml;
GMarker.prototype.openInfoWindowHtml = function ( html, opts )
    {
    if ( this.map != null )
	return this.map.openInfoWindowHtml( this.getPoint(), html, opts );
    else
	return this.origOpenInfoWindowHtml( html, opts );
    };

GMarker.prototype.origOpenInfoWindowTabs = GMarker.prototype.openInfoWindowTabs;
GMarker.prototype.openInfoWindowTabs = function ( tabNodes, opts )
    {
    if ( this.map != null )
	return this.map.openInfoWindowTabs( this.getPoint(), tabNodes, opts );
    else
	return this.origOpenInfoWindowTabs( tabNodes, opts );
    };

GMarker.prototype.origOpenInfoWindowTabsHtml = GMarker.prototype.openInfoWindowTabsHtml;
GMarker.prototype.openInfoWindowTabsHtml = function ( tabHtmls, opts )
    {
    if ( this.map != null )
	return this.map.openInfoWindowTabsHtml( this.getPoint(), tabHtmls, opts );
    else
	return this.origOpenInfoWindowTabsHtml( tabHtmls, opts );
    };

GMarker.prototype.origShowMapBlowup = GMarker.prototype.showMapBlowup;
GMarker.prototype.showMapBlowup = function ( opts )
    {
    if ( this.map != null )
	return this.map.showMapBlowup( this.getPoint(), opts );
    else
	return this.origShowMapBlowup( opts );
    };