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: 18
  42         });
  43
  44         if (options.mapurl) {
  45                 var newLayer = new OpenLayers.Layer.OSM("Local Tiles", options.mapurl, {numZoomLevels: 19, isBaseLayer: true});
  46                 map.addLayer(newLayer);
  47         } else {
  48                 map.addLayer(new OpenLayers.Layer.OSM());
  49         }
  50
  51         // this nightmare is possible through http://docs.openlayers.org/library/spherical_mercator.html
  52         if (options.google_apikey && options.google_apikey != 'null') {
  53                 googleLayer = new OpenLayers.Layer.Google(
  54                         "Google Hybrid",
  55                         {type: G_HYBRID_MAP,
  56                          'sphericalMercator': true,
  57                          'maxExtent': new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
  58                          projection: new OpenLayers.Projection("EPSG:3857")}
  59                 );
  60                 map.addLayer(googleLayer);
  61         }
  62         if (options.format == 'CSV') {
  63                 pois = new OpenLayers.Layer.Text( "CSV",
  64                         { location: options.csvurl,
  65                           projection: new OpenLayers.Projection("EPSG:4326")
  66                         });
  67         } else if (options.format == 'GeoJSON') {
  68                 pois = new OpenLayers.Layer.Vector("GeoJSON", {
  69                         protocol: new OpenLayers.Protocol.HTTP({
  70                                 url: options.jsonurl,
  71                                 format: new OpenLayers.Format.GeoJSON()
  72                         }),
  73                         strategies: [new OpenLayers.Strategy.Fixed()],
  74                         projection: new OpenLayers.Projection("EPSG:4326")
  75                 });
  76         } else {
  77                 pois = new OpenLayers.Layer.Vector("KML", {
  78                         protocol: new OpenLayers.Protocol.HTTP({
  79                                 url: options.kmlurl,
  80                                 format: new OpenLayers.Format.KML({
  81                                         extractStyles: true,
  82                                         extractAttributes: true
  83                                 })
  84                         }),
  85                         strategies: [new OpenLayers.Strategy.Fixed()],
  86                         projection: new OpenLayers.Projection("EPSG:4326")
  87                 });
  88         }
  89         map.addLayer(pois);
  90         select = new OpenLayers.Control.SelectFeature(pois);
  91         map.addControl(select);
  92         select.activate();
  93
  94         pois.events.on({
  95                 "featureselected": function (event) {
  96                         var feature = event.feature;
  97                         var content = '<h2><a href="' + feature.attributes.href + '">' +feature.attributes.name + "</a></h2>" + feature.attributes.description;
  98                         popup = new OpenLayers.Popup.FramedCloud("chicken",
  99                                 feature.geometry.getBounds().getCenterLonLat(),
 100                                 new OpenLayers.Size(100,100),
 101                                 content,
 102                                 null, true, function () {select.unselectAll()});
 103                         feature.popup = popup;
 104                         map.addPopup(popup);
 105                 },
 106                 "featureunselected": function (event) {
 107                         var feature = event.feature;
 108                         if (feature.popup) {
 109                                 map.removePopup(feature.popup);
 110                                 feature.popup.destroy();
 111                                 delete feature.popup;
 112                         }
 113                 }
 114         });
 115
 116         if (options.editable) {
 117                 vlayer = new OpenLayers.Layer.Vector( "Editable" );
 118                 map.addControl(new OpenLayers.Control.EditingToolbar(vlayer));
 119                 map.addLayer(vlayer);
 120         }
 121
 122         if (options.fullscreen) {
 123                 map.addControl(new OpenLayers.Control.PanZoomBar());
 124                 map.addControl(new OpenLayers.Control.LayerSwitcher({'ascending':false}));
 125                 map.addControl(new OpenLayers.Control.MousePosition());
 126                 map.addControl(new OpenLayers.Control.KeyboardDefaults());
 127         } else {
 128                 map.addControl(new OpenLayers.Control.ZoomPanel());
 129         }
 130
 131         //Set start centrepoint and zoom
 132         if (!options.lat || !options.lon) {
 133                 options.lat = urlParams['lat'];
 134                 options.lon = urlParams['lon'];
 135         }
 136         if (!options.zoom) {
 137                 options.zoom = urlParams['zoom'];
 138         }
 139         if (options.lat && options.lon) {
 140                 var lat = options.lat;
 141                 var lon = options.lon;
 142                 var zoom= options.zoom || 10;
 143                 center = new OpenLayers.LonLat( lon, lat ).transform(
 144                         new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
 145                         map.getProjectionObject() // to Spherical Mercator Projection
 146                 );
 147                 map.setCenter (center, zoom);
 148         } else {
 149                 pois.events.register("loadend", this, function () { map.zoomToExtent(pois.getDataExtent()); });
 150         }
 151 }