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authorCraig Andrews <candrews@integralblue.com>2009-12-29 16:19:33 -0500
committerCraig Andrews <candrews@integralblue.com>2009-12-29 16:19:33 -0500
commit552de999bfe660cbf88eb9b1ce19e55b2f6b3d92 (patch)
tree11a5fb833dc376f85059442dcc77e26cf4e42359
parent98ce7daf5650ebd7e6f6bbaca6e57069ffccae55 (diff)
Revert "Drop the Google Client API-based AJAX geolocation lookup shim -- it fails to ask for user permission, causing us quite a bit of difficulty."
This reverts commit 749b8b5b8ca4d1c39d350879aadddbdb9d8b71d5.
-rw-r--r--js/geometa.js123
1 files changed, 118 insertions, 5 deletions
diff --git a/js/geometa.js b/js/geometa.js
index 87e3c99a1..21deb1885 100644
--- a/js/geometa.js
+++ b/js/geometa.js
@@ -1,4 +1,4 @@
-// A shim to implement the W3C Geolocation API Specification using Gears
+// A shim to implement the W3C Geolocation API Specification using Gears or the Ajax API
if (typeof navigator.geolocation == "undefined" || navigator.geolocation.shim ) (function(){
// -- BEGIN GEARS_INIT
@@ -96,9 +96,122 @@ var GearsGeoLocation = (function() {
};
});
-// If you have Gears installed use that
-if (window.google && google.gears) {
- navigator.geolocation = GearsGeoLocation();
-}
+var AjaxGeoLocation = (function() {
+ // -- PRIVATE
+ var loading = false;
+ var loadGoogleLoader = function() {
+ if (!hasGoogleLoader() && !loading) {
+ loading = true;
+ var s = document.createElement('script');
+ s.src = (document.location.protocol == "https:"?"https://":"http://") + 'www.google.com/jsapi?callback=_google_loader_apiLoaded';
+ s.type = "text/javascript";
+ document.getElementsByTagName('body')[0].appendChild(s);
+ }
+ };
+
+ var queue = [];
+ var addLocationQueue = function(callback) {
+ queue.push(callback);
+ }
+
+ var runLocationQueue = function() {
+ if (hasGoogleLoader()) {
+ while (queue.length > 0) {
+ var call = queue.pop();
+ call();
+ }
+ }
+ }
+
+ window['_google_loader_apiLoaded'] = function() {
+ runLocationQueue();
+ }
+
+ var hasGoogleLoader = function() {
+ return (window['google'] && google['loader']);
+ }
+
+ var checkGoogleLoader = function(callback) {
+ if (hasGoogleLoader()) return true;
+
+ addLocationQueue(callback);
+
+ loadGoogleLoader();
+
+ return false;
+ };
+
+ loadGoogleLoader(); // start to load as soon as possible just in case
+
+ // -- PUBLIC
+ return {
+ shim: true,
+
+ type: "ClientLocation",
+
+ lastPosition: null,
+
+ getCurrentPosition: function(successCallback, errorCallback, options) {
+ var self = this;
+ if (!checkGoogleLoader(function() {
+ self.getCurrentPosition(successCallback, errorCallback, options);
+ })) return;
+
+ if (google.loader.ClientLocation) {
+ var cl = google.loader.ClientLocation;
+
+ var position = {
+ coords: {
+ latitude: cl.latitude,
+ longitude: cl.longitude,
+ altitude: null,
+ accuracy: 43000, // same as Gears accuracy over wifi?
+ altitudeAccuracy: null,
+ heading: null,
+ speed: null,
+ },
+ // extra info that is outside of the bounds of the core API
+ address: {
+ city: cl.address.city,
+ country: cl.address.country,
+ country_code: cl.address.country_code,
+ region: cl.address.region
+ },
+ timestamp: new Date()
+ };
+
+ successCallback(position);
+
+ this.lastPosition = position;
+ } else if (errorCallback === "function") {
+ errorCallback({ code: 3, message: "Using the Google ClientLocation API and it is not able to calculate a location."});
+ }
+ },
+
+ watchPosition: function(successCallback, errorCallback, options) {
+ this.getCurrentPosition(successCallback, errorCallback, options);
+
+ var self = this;
+ var watchId = setInterval(function() {
+ self.getCurrentPosition(successCallback, errorCallback, options);
+ }, 10000);
+
+ return watchId;
+ },
+
+ clearWatch: function(watchId) {
+ clearInterval(watchId);
+ },
+
+ getPermission: function(siteName, imageUrl, extraMessage) {
+ // for now just say yes :)
+ return true;
+ }
+
+ };
+});
+
+// If you have Gears installed use that, else use Ajax ClientLocation
+navigator.geolocation = (window.google && google.gears) ? GearsGeoLocation() : AjaxGeoLocation();
})();