underlays/javascript/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                 numZoomLevels: 18
  38         });
  39
  40
  41         map.addLayer(new OpenLayers.Layer.OSM());
  42         if (options.format == 'CSV') {
  43                 pois = new OpenLayers.Layer.Text( "CSV",
  44                         { location:"/" + options.map + "/pois.txt",
  45                           projection: map.displayProjection
  46                         });
  47         } else if (options.format == 'GeoJSON') {
  48                 pois = new OpenLayers.Layer.Vector("GeoJSON", {
  49                         protocol: new OpenLayers.Protocol.HTTP({
  50                                 url: "/" + options.map + "/pois.json",
  51                                 format: new OpenLayers.Format.GeoJSON()
  52                         }),
  53                         strategies: [new OpenLayers.Strategy.Fixed()]
  54                 });
  55         } else {
  56                 pois = new OpenLayers.Layer.Vector("KML", {
  57                         protocol: new OpenLayers.Protocol.HTTP({
  58                                 url: "/" + options.map + "/pois.kml",
  59                                 format: new OpenLayers.Format.KML({
  60                                         extractStyles: true,
  61                                         extractAttributes: true
  62                                 })
  63                         }),
  64                 strategies: [new OpenLayers.Strategy.Fixed()]});
  65         }
  66         map.addLayer(pois);
  67         select = new OpenLayers.Control.SelectFeature(pois);
  68         map.addControl(select);
  69         select.activate();
  70
  71         pois.events.on({
  72                 "featureselected": function (event) {
  73                         var feature = event.feature;
  74                         var content = '<h2><a href="' + feature.attributes.href + '">' +feature.attributes.name + "</a></h2>" + feature.attributes.description;
  75                         popup = new OpenLayers.Popup.FramedCloud("chicken",
  76                                 feature.geometry.getBounds().getCenterLonLat(),
  77                                 new OpenLayers.Size(100,100),
  78                                 content,
  79                                 null, true, function () {select.unselectAll()});
  80                         feature.popup = popup;
  81                         map.addPopup(popup);
  82                 },
  83                 "featureunselected": function (event) {
  84                         var feature = event.feature;
  85                         if (feature.popup) {
  86                                 map.removePopup(feature.popup);
  87                                 feature.popup.destroy();
  88                                 delete feature.popup;
  89                         }
  90                 }
  91         });
  92
  93         if (options.editable) {
  94                 vlayer = new OpenLayers.Layer.Vector( "Editable" );
  95                 map.addControl(new OpenLayers.Control.EditingToolbar(vlayer));
  96                 map.addLayer(vlayer);
  97         }
  98
  99         if (options.fullscreen) {
 100                 map.addControl(new OpenLayers.Control.PanZoomBar());
 101                 map.addControl(new OpenLayers.Control.LayerSwitcher({'ascending':false}));
 102                 map.addControl(new OpenLayers.Control.MousePosition());
 103                 map.addControl(new OpenLayers.Control.KeyboardDefaults());
 104         } else {
 105                 map.addControl(new OpenLayers.Control.ZoomPanel());
 106         }
 107
 108         //Set start centrepoint and zoom
 109         if (!options.lat || !options.lon) {
 110                 options.lat = urlParams['lat'];
 111                 options.lon = urlParams['lon'];
 112         }
 113         if (!options.zoom) {
 114                 options.zoom = urlParams['zoom'];
 115         }
 116         if (options.lat && options.lon) {
 117                 var lat = options.lat;
 118                 var lon = options.lon;
 119                 var zoom= options.zoom || 10;
 120                 center = new OpenLayers.LonLat( lon, lat ).transform(
 121                         new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
 122                         map.getProjectionObject() // to Spherical Mercator Projection
 123                 );
 124                 map.setCenter (center, zoom);
 125         } else {
 126                 pois.events.register("loadend", this, function () { map.zoomToExtent(pois.getDataExtent()); });
 127         }
 128 }