From 081fd3863698a273eb468cceec84cc0cffb10261 Mon Sep 17 00:00:00 2001
From: Antoine Beaupré <anarcat@koumbit.org>
Date: Fri, 24 Aug 2012 15:55:28 -0400
Subject: make layers completely customizable

---
 IkiWiki/Plugin/osm.pm        | 17 ++++++++++++---
 underlays/osm/ikiwiki/osm.js | 51 +++++++++++++++++++++++++++++++-------------
 2 files changed, 50 insertions(+), 18 deletions(-)

diff --git a/IkiWiki/Plugin/osm.pm b/IkiWiki/Plugin/osm.pm
index d86dbd66e..4c50fec53 100644
--- a/IkiWiki/Plugin/osm.pm
+++ b/IkiWiki/Plugin/osm.pm
@@ -67,10 +67,19 @@ sub getsetup () {
 			safe => 0,
 			rebuild => 1,
 		},
-		osm_map_url => {
+		osm_layers => {
 			type => "string",
-			example => "/tiles/\${z}/\${x}/\${y}.png",
-			description => "Url to get map tiles from (if none specified, uses the openstreetmap server, see http://wiki.openstreetmap.org/wiki/Creating_your_own_tiles for more info on serving your own tiles)",
+			example => { OSM => 1,
+				     Google => 'Hybrid',
+			},
+			description => "Layers to use in the map. If the value is 1, use the default for the map, otherwise the argument is a URL (for OSM layers, e.g. http://a.tile.stamen.com/toner/\${z}/\${x}/\${y}.png) or a type option for Google maps (Normal, Satellite, Hybrid or Physical).",
+			safe => 0,
+			rebuild => 1,
+		},
+		osm_layers_order => {
+			type => "string",
+			example => { 'OSM', 'Google' },
+			description => "Display order for the layers. The first layer is the default layer, must match exactly the left side of the osm_layers hash.",
 			safe => 0,
 			rebuild => 1,
 		},
@@ -580,6 +589,8 @@ sub map_setup_code($;@) {
 	if ($mapurl) {
 		$options{'mapurl'} = $mapurl;
 	}
+        $options{'layers'} = $config{osm_layers};
+        $options{'layers_order'} = $config{osm_layers_order};
 
 	return "mapsetup('mapdiv-$name', " . to_json(\%options) . ");";
 }
diff --git a/underlays/osm/ikiwiki/osm.js b/underlays/osm/ikiwiki/osm.js
index 4f53b1dc8..9547ee29c 100644
--- a/underlays/osm/ikiwiki/osm.js
+++ b/underlays/osm/ikiwiki/osm.js
@@ -41,23 +41,44 @@ function mapsetup(divname, options) {
 		numZoomLevels: 19
 	});
 
-	if (options.mapurl) {
-		map.addLayer(new OpenLayers.Layer.OSM("OpenStreetMap (Local)", options.mapurl));
-	} else {
-		map.addLayer(new OpenLayers.Layer.OSM("OpenStreetMap (Mapnik)"));
+	for (x in options.layers_order) {
+		layer = options.layers_order[x];
+		console.log("setting up layer: " + layer + " with argument : " + options.layers[layer]);
+		if (layer.indexOf("Google") >= 0) {
+			if (options.google_apikey && options.google_apikey != 'null') {
+				var gtype = G_NORMAL_MAP;
+				var gtext = "";
+				if (options.layers[layer] == "Satellite") {
+					gtype = G_SATELLITE_MAP;
+				} else if (options.layers[layer] == "Hybrid") {
+					gtype = G_HYBRID_MAP // the normal map overlaying the satellite photographs
+				} else if (options.layers[layer] == "Physical") {
+					gtype = G_PHYSICAL_MAP // terrain information
+				}
+				// this nightmare is possible through http://docs.openlayers.org/library/spherical_mercator.html
+				googleLayer = new OpenLayers.Layer.Google(
+					"Google " + options.layers[layer],
+					{type: gtype,
+					 'sphericalMercator': true,
+					 'maxExtent': new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
+					 projection: new OpenLayers.Projection("EPSG:3857")}
+				);
+				map.addLayer(googleLayer);
+			} else {
+				console.log("no API key defined for Google layer, skipping");
+			}
+		} else { // OSM
+			if (options.layers[layer] != 1) {
+				l = options.layers[layer];
+				fqdn = l.split("/")[2].split(".")
+				text = fqdn[fqdn.length-2]
+				map.addLayer(new OpenLayers.Layer.OSM("OpenStreetMap (" + text + ")", l));
+			} else {
+				map.addLayer(new OpenLayers.Layer.OSM("OpenStreetMap (Mapnik)"));
+			}
+		}
 	}
 
-	// this nightmare is possible through http://docs.openlayers.org/library/spherical_mercator.html
-	if (options.google_apikey && options.google_apikey != 'null') {
-		googleLayer = new OpenLayers.Layer.Google(
-			"Google Hybrid",
-			{type: G_HYBRID_MAP,
-			 'sphericalMercator': true,
-			 'maxExtent': new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
-			 projection: new OpenLayers.Projection("EPSG:3857")}
-		);
-		map.addLayer(googleLayer);
-	}
 	if (options.format == 'CSV') {
 		pois = new OpenLayers.Layer.Text( "CSV",
 			{ location: options.csvurl,
-- 
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