X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/9619dfdb4bac9df864b738c2180120a680fe9cec..2e03861300bca1a44d50a9e9c684ffc0e2d6ad65:/public/javascripts/map.js

diff --git a/public/javascripts/map.js b/public/javascripts/map.js
index 4ba66b03f..0c13b016e 100644
--- a/public/javascripts/map.js
+++ b/public/javascripts/map.js
@@ -2,49 +2,47 @@ var map;
 var markers;
 var popup;
 
-function createMap(divName, centre, zoom) {
-   OpenLayers.Util.onImageLoadError = function() {
-      this.src = OpenLayers.Util.getImagesLocation() + "404.png";
-   }
-
-   map = new OpenLayers.Map(divName,
-                            { maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
-                              numZoomLevels: 19,
-                              maxResolution: 156543,
-                              units: 'm',
-                              projection: "EPSG:41001" });
+OpenLayers._getScriptLocation = function () {
+   return "/openlayers/";
+}
+   
+function createMap(divName) {
+   map = new OpenLayers.Map(divName);
 
-   var mapnik = new OpenLayers.Layer.TMS("Mapnik",
-                                         "http://tile.openstreetmap.org/",
-                                         { type: 'png', getURL: getTileURL });
+   var mapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik", { displayOutsideMaxExtent: true });
    map.addLayer(mapnik);
 
-   var osmarender = new OpenLayers.Layer.TMS("Osmarender",
-                                             "http://dev.openstreetmap.org/~ojw/Tiles/tile.php/",
-                                             { type: 'png', getURL: getTileURL });
+   var osmarender = new OpenLayers.Layer.OSM.Osmarender("Osmarender", { displayOutsideMaxExtent: true });
    map.addLayer(osmarender);
 
+   var maplint = new OpenLayers.Layer.OSM.Maplint("Maplint", { displayOutsideMaxExtent: true });
+   map.addLayer(maplint);
+
+   var numZoomLevels = Math.max(mapnik.numZoomLevels, osmarender.numZoomLevels);
+   markers = new OpenLayers.Layer.Markers("Markers", { 
+      displayInLayerSwitcher: false, numZoomLevels: numZoomLevels,
+      maxExtent: new OpenLayers.Bounds(-20037508,-20037508,20037508,20037508),
+      maxResolution: 156543,
+      units: "m",
+      projection: "EPSG:41001"
+   });
+   map.addLayer(markers);
+
    map.addControl(new OpenLayers.Control.LayerSwitcher());
-   map.setCenter(centre, zoom);
+   map.addControl(new OpenLayers.Control.KeyboardDefaults());
 
    return map;
 }
 
-function getTileURL(bounds) {
-   var res = this.map.getResolution();
-   var x = Math.round((bounds.left - this.maxExtent.left) / (res * this.tileSize.w));
-   var y = Math.round((this.maxExtent.top - bounds.top) / (res * this.tileSize.h));
-   var z = this.map.getZoom();
+function getArrowIcon() {
+   var size = new OpenLayers.Size(25, 22);
+   var offset = new OpenLayers.Pixel(-30, -27);
+   var icon = new OpenLayers.Icon("/images/arrow.png", size, offset);
 
-   return this.url + z + "/" + x + "/" + y + "." + this.type;
+   return icon;
 }
 
 function addMarkerToMap(position, icon, description) {
-   if (markers == null) {
-      markers = new OpenLayers.Layer.Markers("markers");
-      map.addLayer(markers);
-   }
-
    var marker = new OpenLayers.Marker(position, icon);
 
    markers.addMarker(marker);
@@ -57,17 +55,11 @@ function addMarkerToMap(position, icon, description) {
 }
 
 function openMapPopup(marker, description) {
-//   var box = document.createElement("div");
-//   box.innerHTML = description;
-//   box.style.display = 'none';
-//   box.style.width = "200px";
-//   document.body.appendChild(box);
-
    closeMapPopup();
 
    popup = new OpenLayers.Popup.AnchoredBubble("popup", marker.lonlat,
-                                               new OpenLayers.Size(200, 50),
-                                               "<p>" + description + "</p>",
+                                               sizeMapPopup(description),
+                                               "<p style='padding-right: 28px'>" + description + "</p>",
                                                marker.icon, true);
    popup.setBackgroundColor("#E3FFC5");
    map.addPopup(popup);
@@ -82,29 +74,128 @@ function closeMapPopup() {
    }
 }
 
+function sizeMapPopup(text) {
+   var box = document.createElement("div");
+
+   box.innerHTML = text;
+   box.style.visibility = "hidden";
+   box.style.position = "absolute";
+   box.style.top = "0px";
+   box.style.left = "0px";
+   box.style.width = "200px";
+   box.style.height = "auto";
+
+   document.body.appendChild(box);
+
+   var width = box.offsetWidth;
+   var height = box.offsetHeight;
+
+   document.body.removeChild(box);
+
+   return new OpenLayers.Size(width + 30, height + 24);
+}
+
 function removeMarkerFromMap(marker){
    markers.removeMarker(marker);
 }
 
+function getMapLayers() {
+   var layers = "";
+
+   for (var i=0; i< this.map.layers.length; i++) {
+      var layer = this.map.layers[i];
+
+      if (layer.isBaseLayer) {
+         layers += (layer == this.map.baseLayer) ? "B" : "0";
+      } else {
+         layers += (layer.getVisibility()) ? "T" : "F";
+      }
+   }
+
+   return layers;
+}
+
+function setMapLayers(layers) {
+   for (var i=0; i < layers.length; i++) {
+      var layer = map.layers[i];
+      var c = layers.charAt(i);
+
+      if (c == "B") {
+         map.setBaseLayer(layer);
+      } else if ( (c == "T") || (c == "F") ) {
+         layer.setVisibility(c == "T");
+      }
+   }
+}
+
 function mercatorToLonLat(merc) {
    var lon = (merc.lon / 20037508.34) * 180;
    var lat = (merc.lat / 20037508.34) * 180;
-   var PI = 3.14159265358979323846;
 
-   lat = 180/PI * (2 * Math.atan(Math.exp(lat * PI / 180)) - PI / 2);
+   lat = 180/Math.PI * (2 * Math.atan(Math.exp(lat * Math.PI / 180)) - Math.PI / 2);
 
    return new OpenLayers.LonLat(lon, lat);
 }
 
 function lonLatToMercator(ll) {
    var lon = ll.lon * 20037508.34 / 180;
-   var lat = Math.log(Math.tan((90 + ll.lat) * PI / 360)) / (PI / 180);
+   var lat = Math.log(Math.tan((90 + ll.lat) * Math.PI / 360)) / (Math.PI / 180);
 
    lat = lat * 20037508.34 / 180;
 
    return new OpenLayers.LonLat(lon, lat);
 }
 
+// for interacting with the PostGIS database which uses non spherical
+// Mercator. Taken from Freemap which in turn was taken from a standard
+// algorithm off the net.
+
+function lonLatToNonSphericalMercator(ll) {
+    var custLat  = ll.lat * (Math.PI/180);
+    var a = 6378137;
+    var b = 6356752.3142;
+    var f = (a-b)/a;
+    var e = Math.sqrt(2*f-Math.pow(f,2));
+    custLat=a*Math.log(Math.tan(Math.PI/4+custLat/2)*
+        Math.pow(( (1-e*Math.sin(custLat)) / (1+e*Math.sin(custLat))),e/2));
+    custLon = ll.lon * (Math.PI/180) * 6378137;
+    return new OpenLayers.LonLat (custLon,custLat);
+}
+
+function nonSphericalMercatorToLonLat(merc) {
+    var lon_deg, lat_deg;
+    var a = 6378137.0;
+    var b = 6356752.3142;
+    var k0 = 1.0;
+    var t = 1.0 - b/a;
+    var es = 2*t - t*t;
+    var e = Math.sqrt(es);
+    lon_deg = merc.lon;
+    lat_deg = merc.lat;
+    lon_deg /= a;
+    lat_deg /= a;
+    lon_deg /= k0;
+    lat_deg = phi2(Math.exp(-lat_deg/k0), e);
+    lon_deg *= (180/M_PI);
+    lat_deg *= (180/M_PI);
+    return new OpenLayers.LonLat(lon_deg,lat_deg);
+}
+
+function phi2 (ts,e) {
+    var eccnth = 0.5*e;
+    var Phi = (PI/2) - 2.0*Math.atan(ts);
+    var dphi;
+    var i=15;
+    do {
+        var con = e*Math.sin(Phi);
+        dphi = (PI/2) - 2.0*Math.atan(ts*Math.pow((1.0-con)/(1.0+con),eccnth))
+            - Phi;
+        Phi += dphi;
+    }
+    while(Math.abs(dphi) > 0.0000000001 && --i);
+    return Phi;
+}
+
 function scaleToZoom(scale) {
    return Math.log(360.0/(scale * 512.0)) / Math.log(2.0);
 }