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         if (options.mapurl) {
  45                 map.addLayer(new OpenLayers.Layer.OSM("OpenStreetMap (Local)", options.mapurl));
  46         } else {
  47                 map.addLayer(new OpenLayers.Layer.OSM("OpenStreetMap (Mapnik)"));
  48         }
  49
  50         // this nightmare is possible through http://docs.openlayers.org/library/spherical_mercator.html
  51         if (options.google_apikey && options.google_apikey != 'null') {
  52                 googleLayer = new OpenLayers.Layer.Google(
  53                         "Google Hybrid",
  54                         {type: G_HYBRID_MAP,
  55                          'sphericalMercator': true,
  56                          'maxExtent': new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
  57                          projection: new OpenLayers.Projection("EPSG:3857")}
  58                 );
  59                 map.addLayer(googleLayer);
  60         }
  61         if (options.format == 'CSV') {
  62                 pois = new OpenLayers.Layer.Text( "CSV",
  63                         { location: options.csvurl,
  64                           projection: new OpenLayers.Projection("EPSG:4326")
  65                         });
  66         } else if (options.format == 'GeoJSON') {
  67                 pois = new OpenLayers.Layer.Vector("GeoJSON", {
  68                         protocol: new OpenLayers.Protocol.HTTP({
  69                                 url: options.jsonurl,
  70                                 format: new OpenLayers.Format.GeoJSON()
  71                         }),
  72                         strategies: [new OpenLayers.Strategy.Fixed()],
  73                         projection: new OpenLayers.Projection("EPSG:4326")
  74                 });
  75         } else {
  76                 pois = new OpenLayers.Layer.Vector("KML", {
  77                         protocol: new OpenLayers.Protocol.HTTP({
  78                                 url: options.kmlurl,
  79                                 format: new OpenLayers.Format.KML({
  80                                         extractStyles: true,
  81                                         extractAttributes: true
  82                                 })
  83                         }),
  84                         strategies: [new OpenLayers.Strategy.Fixed()],
  85                         projection: new OpenLayers.Projection("EPSG:4326")
  86                 });
  87         }
  88         map.addLayer(pois);
  89         select = new OpenLayers.Control.SelectFeature(pois);
  90         map.addControl(select);
  91         select.activate();
  92
  93         pois.events.on({
  94                 "featureselected": function (event) {
  95                         var feature = event.feature;
  96                         var content = '<h2><a href="' + feature.attributes.href + '">' +feature.attributes.name + "</a></h2>" + feature.attributes.description;
  97                         popup = new OpenLayers.Popup.FramedCloud("chicken",
  98                                 feature.geometry.getBounds().getCenterLonLat(),
  99                                 new OpenLayers.Size(100,100),
 100                                 content,
 101                                 null, true, function () {select.unselectAll()});
 102                         feature.popup = popup;
 103                         map.addPopup(popup);
 104                 },
 105                 "featureunselected": function (event) {
 106                         var feature = event.feature;
 107                         if (feature.popup) {
 108                                 map.removePopup(feature.popup);
 109                                 feature.popup.destroy();
 110                                 delete feature.popup;
 111                         }
 112                 }
 113         });
 114
 115         if (options.editable) {
 116                 vlayer = new OpenLayers.Layer.Vector( "Editable" );
 117                 map.addControl(new OpenLayers.Control.EditingToolbar(vlayer));
 118                 map.addLayer(vlayer);
 119         }
 120
 121         if (options.fullscreen) {
 122                 map.addControl(new OpenLayers.Control.PanZoomBar());
 123                 map.addControl(new OpenLayers.Control.LayerSwitcher({'ascending':false}));
 124                 map.addControl(new OpenLayers.Control.MousePosition());
 125                 map.addControl(new OpenLayers.Control.KeyboardDefaults());
 126         } else {
 127                 map.addControl(new OpenLayers.Control.ZoomPanel());
 128         }
 129
 130         //Set start centrepoint and zoom
 131         if (!options.lat || !options.lon) {
 132                 options.lat = urlParams['lat'];
 133                 options.lon = urlParams['lon'];
 134         }
 135         if (!options.zoom) {
 136                 options.zoom = urlParams['zoom'];
 137         }
 138         if (options.lat && options.lon) {
 139                 var lat = options.lat;
 140                 var lon = options.lon;
 141                 var zoom= options.zoom || 10;
 142                 center = new OpenLayers.LonLat( lon, lat ).transform(
 143                         new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
 144                         map.getProjectionObject() // to Spherical Mercator Projection
 145                 );
 146                 map.setCenter (center, zoom);
 147         } else {
 148                 pois.events.register("loadend", this, function () { map.zoomToExtent(pois.getDataExtent()); });
 149         }
 150 }