underlays/osm/ikiwiki/osm.js

   1 // taken from http://stackoverflow.com/questions/901115/get-query-string-values-in-javascript
   2 var urlParams = {};
   3 (function () {
   4         var e,
   5         a = /\\+/g,  // Regex for replacing addition symbol with a space
   6         r = /([^&=]+)=?([^&]*)/g,
   7         d = function (s) { return decodeURIComponent(s.replace(a, " ")); },
   8         q = window.location.search.substring(1);
   9
  10         while (e = r.exec(q))
  11         urlParams[d(e[1])] = d(e[2]);
  12 })();
  13
  14 function mapsetup(divname, options) {
  15         div = document.getElementById(divname);
  16         if (options.fullscreen) {
  17                 permalink = 'permalink';
  18                 div.style.top = 0;
  19                 div.style.left = 0;
  20                 div.style.position = 'absolute';
  21                 div.style.width = '100%';
  22                 div.style.height = '100%';
  23         }
  24         else {
  25                 div.style.height = options.height;
  26                 div.style.width = options.width;
  27                 div.style.float = options.float;
  28                 permalink = {base: options.href, title: "View larger map"};
  29         }
  30         map = new OpenLayers.Map(divname, {
  31                 controls: [
  32                         new OpenLayers.Control.Navigation(),
  33                         new OpenLayers.Control.ScaleLine(),
  34                         new OpenLayers.Control.Permalink(permalink)
  35                 ],
  36                 displayProjection: new OpenLayers.Projection("EPSG:4326"),
  37                 maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
  38                 projection: "EPSG:900913",
  39                 units: "m",
  40                 maxResolution: 156543.0339,
  41                 numZoomLevels: 19
  42         });
  43
  44         for (x in options.layers_order) {
  45                 layer = options.layers_order[x];
  46                 console.log("setting up layer: " + layer + " with argument : " + options.layers[layer]);
  47                 if (layer.indexOf("Google") >= 0) {
  48                         if (options.google_apikey && options.google_apikey != 'null') {
  49                                 var gtype = G_NORMAL_MAP;
  50                                 var gtext = "";
  51                                 if (options.layers[layer] == "Satellite") {
  52                                         gtype = G_SATELLITE_MAP;
  53                                 } else if (options.layers[layer] == "Hybrid") {
  54                                         gtype = G_HYBRID_MAP // the normal map overlaying the satellite photographs
  55                                 } else if (options.layers[layer] == "Physical") {
  56                                         gtype = G_PHYSICAL_MAP // terrain information
  57                                 }
  58                                 // this nightmare is possible through http://docs.openlayers.org/library/spherical_mercator.html
  59                                 googleLayer = new OpenLayers.Layer.Google(
  60                                         "Google " + options.layers[layer],
  61                                         {type: gtype,
  62                                          'sphericalMercator': true,
  63                                          'maxExtent': new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
  64                                          projection: new OpenLayers.Projection("EPSG:3857")}
  65                                 );
  66                                 map.addLayer(googleLayer);
  67                         } else {
  68                                 console.log("no API key defined for Google layer, skipping");
  69                         }
  70                 } else { // OSM
  71                         if (options.layers[layer] != 1) {
  72                                 l = options.layers[layer];
  73                                 fqdn = l.split("/")[2].split(".")
  74                                 text = fqdn[fqdn.length-2]
  75                                 map.addLayer(new OpenLayers.Layer.OSM("OpenStreetMap (" + text + ")", l));
  76                         } else {
  77                                 map.addLayer(new OpenLayers.Layer.OSM("OpenStreetMap (Mapnik)"));
  78                         }
  79                 }
  80         }
  81
  82         if (options.format == 'CSV') {
  83                 pois = new OpenLayers.Layer.Text( "CSV",
  84                         { location: options.csvurl,
  85                           projection: new OpenLayers.Projection("EPSG:4326")
  86                         });
  87         } else if (options.format == 'GeoJSON') {
  88                 pois = new OpenLayers.Layer.Vector("GeoJSON", {
  89                         protocol: new OpenLayers.Protocol.HTTP({
  90                                 url: options.jsonurl,
  91                                 format: new OpenLayers.Format.GeoJSON()
  92                         }),
  93                         strategies: [new OpenLayers.Strategy.Fixed()],
  94                         projection: new OpenLayers.Projection("EPSG:4326")
  95                 });
  96         } else {
  97                 pois = new OpenLayers.Layer.Vector("KML", {
  98                         protocol: new OpenLayers.Protocol.HTTP({
  99                                 url: options.kmlurl,
 100                                 format: new OpenLayers.Format.KML({
 101                                         extractStyles: true,
 102                                         extractAttributes: true
 103                                 })
 104                         }),
 105                         strategies: [new OpenLayers.Strategy.Fixed()],
 106                         projection: new OpenLayers.Projection("EPSG:4326")
 107                 });
 108         }
 109         map.addLayer(pois);
 110         select = new OpenLayers.Control.SelectFeature(pois);
 111         map.addControl(select);
 112         select.activate();
 113
 114         pois.events.on({
 115                 "featureselected": function (event) {
 116                         var feature = event.feature;
 117                         var content = '<h2><a href="' + feature.attributes.href + '">' +feature.attributes.name + "</a></h2>" + feature.attributes.description;
 118                         popup = new OpenLayers.Popup.FramedCloud("chicken",
 119                                 feature.geometry.getBounds().getCenterLonLat(),
 120                                 new OpenLayers.Size(100,100),
 121                                 content,
 122                                 null, true, function () {select.unselectAll()});
 123                         feature.popup = popup;
 124                         map.addPopup(popup);
 125                 },
 126                 "featureunselected": function (event) {
 127                         var feature = event.feature;
 128                         if (feature.popup) {
 129                                 map.removePopup(feature.popup);
 130                                 feature.popup.destroy();
 131                                 delete feature.popup;
 132                         }
 133                 }
 134         });
 135
 136         if (options.editable) {
 137                 vlayer = new OpenLayers.Layer.Vector( "Editable" );
 138                 map.addControl(new OpenLayers.Control.EditingToolbar(vlayer));
 139                 map.addLayer(vlayer);
 140         }
 141
 142         if (options.fullscreen) {
 143                 map.addControl(new OpenLayers.Control.PanZoomBar());
 144                 map.addControl(new OpenLayers.Control.LayerSwitcher({'ascending':false}));
 145                 map.addControl(new OpenLayers.Control.MousePosition());
 146                 map.addControl(new OpenLayers.Control.KeyboardDefaults());
 147         } else {
 148                 map.addControl(new OpenLayers.Control.ZoomPanel());
 149         }
 150
 151         //Set start centrepoint and zoom
 152         if (!options.lat || !options.lon) {
 153                 options.lat = urlParams['lat'];
 154                 options.lon = urlParams['lon'];
 155         }
 156         if (!options.zoom) {
 157                 options.zoom = urlParams['zoom'];
 158         }
 159         if (options.lat && options.lon) {
 160                 var lat = options.lat;
 161                 var lon = options.lon;
 162                 var zoom= options.zoom || 10;
 163                 center = new OpenLayers.LonLat( lon, lat ).transform(
 164                         new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
 165                         map.getProjectionObject() // to Spherical Mercator Projection
 166                 );
 167                 map.setCenter (center, zoom);
 168         } else {
 169                 pois.events.register("loadend", this, function () { map.zoomToExtent(pois.getDataExtent()); });
 170         }
 171 }