From 132bfc539b598ce791c6184dd98d6a29f41c1b88 Mon Sep 17 00:00:00 2001
From: Mike Primm <mike@primmhome.com>
Date: Wed, 3 Aug 2011 21:14:15 -0500
Subject: [PATCH] Handle Leaflet freak-out on removed layers during tile load,
 clean up panning

---
 web/js/dynmaputils.js | 31 +++++++++++++++++++++++++++++++
 web/js/map.js         | 38 +++++++++++++++++++++++++-------------
 2 files changed, 56 insertions(+), 13 deletions(-)

diff --git a/web/js/dynmaputils.js b/web/js/dynmaputils.js
index fa2e5163..dbdfffa3 100644
--- a/web/js/dynmaputils.js
+++ b/web/js/dynmaputils.js
@@ -45,9 +45,40 @@ var DynmapTileLayer = L.TileLayer.extend({
 	updateTile: function(tile) {
 		this._loadTile(tile, tile.tilePoint, this._map.getZoom());
 	},
+	// Override to fix loads completing after layer removed
+	_addTilesFromCenterOut: function(bounds) {
+		if(this._container == null)		// Ignore if we've stopped being active layer
+			return;
+		var queue = [],
+			center = bounds.getCenter();
+		
+		for (var j = bounds.min.y; j <= bounds.max.y; j++) {
+			for (var i = bounds.min.x; i <= bounds.max.x; i++) {				
+				if ((i + ':' + j) in this._tiles) { continue; }
+				queue.push(new L.Point(i, j));
+			}
+		}
+		
+		// load tiles in order of their distance to center
+		queue.sort(function(a, b) {
+			return a.distanceTo(center) - b.distanceTo(center);
+		});
+		
+		var fragment = document.createDocumentFragment();
+		
+		this._tilesToLoad = queue.length;
+		for (var k = 0, len = this._tilesToLoad; k < len; k++) {
+			this._addTile(queue[k], fragment);
+		}
+		
+		this._container.appendChild(fragment);
+	},
 	
 	// We should override this, since Leaflet does modulo on tilePoint by default. (https://github.com/CloudMade/Leaflet/blob/master/src/layer/tile/TileLayer.js#L151)
 	_addTile: function(tilePoint) {
+		if(this._container == null)	// Ignore if we're not active layer
+			return;
+			
 		var tilePos = this._getTilePos(tilePoint),
 			zoom = this._map.getZoom(),
 			key = tilePoint.x + ':' + tilePoint.y,
diff --git a/web/js/map.js b/web/js/map.js
index 71078834..c79b12f2 100644
--- a/web/js/map.js
+++ b/web/js/map.js
@@ -299,7 +299,7 @@ DynMap.prototype = {
 		});
 	},
 	getProjection: function() { return this.maptype.getProjection(); },
-	selectMap: function(map, completed) {
+	selectMapAndPan: function(map, location, completed) {
 		if (!map) { throw "Cannot select map " + map; }
 		var me = this;
 		
@@ -333,9 +333,12 @@ DynMap.prototype = {
 		me.map.options.maxZoom = me.maptype.options.maxZoom;
 		me.map.options.minZoom = me.maptype.options.minZoom;
 				
-		if (projectionChanged || worldChanged) {
+		if (projectionChanged || worldChanged || location) {
 			var centerPoint;
-			if(worldChanged) {
+			if(location) {
+				centerPoint = me.getProjection().fromLocationToLatLng(location);
+			}
+			else if(worldChanged) {
 				var centerLocation = $.extend({ x: 0, y: 64, z: 0 }, mapWorld.center);
 				centerPoint = me.getProjection().fromLocationToLatLng(centerLocation);
 			}
@@ -369,28 +372,37 @@ DynMap.prototype = {
 			completed();
 		}
 	},
-	selectWorld: function(world, completed) {
+	selectMap: function(map, completed) {
+		this.selectMapAndPan(map, null, completed);
+	},
+	selectWorldAndPan: function(world, location, completed) {
 		var me = this;
 		if (typeof(world) === 'String') { world = me.worlds[world]; }
 		if (me.world === world) {
-			if (completed) { completed(); }
+			if(location) {
+				var latlng = me.maptype.getProjection().fromLocationToLatLng(location);
+				me.panToLatLng(latlng, completed);
+			}
+			else {
+				if (completed) { completed(); }
+			}
 			return;
 		}
-		me.selectMap(world.defaultmap, completed);
+		me.selectMapAndPan(world.defaultmap, location, completed);
+	},
+	selectWorld: function(world, completed) {
+		this.selectWorldAndPan(world, null, completed);
 	},
 	panToLocation: function(location, completed) {
 		var me = this;
-		var pan = function() {
-			var latlng = me.maptype.getProjection().fromLocationToLatLng(location);
-			me.panToLatLng(latlng, completed);
-		};
 		
 		if (location.world) {
-			me.selectWorld(location.world, function() {
-				pan();
+			me.selectWorldAndPan(location.world, location, function() {
+				if(completed) completed();
 			});
 		} else {
-			pan();
+			var latlng = me.maptype.getProjection().fromLocationToLatLng(location);
+			me.panToLatLng(latlng, completed);
 		}
 	},
 	panToLayerPoint: function(point, completed) {