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Revert "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.""

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This reverts commit 552de999bf.

Playing a bit of back-and-forth with this one :-)
This commit is contained in:
Craig Andrews 2009-12-29 17:12:52 -05:00
parent 552de999bf
commit 2cfa90c752
1 changed files with 5 additions and 118 deletions
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123
js/geometa.js
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@ -1,4 +1,4 @@
// A shim to implement the W3C Geolocation API Specification using Gears or the Ajax API
// A shim to implement the W3C Geolocation API Specification using Gears
if (typeof navigator.geolocation == "undefined" || navigator.geolocation.shim ) (function(){
// -- BEGIN GEARS_INIT
@ -96,122 +96,9 @@ var GearsGeoLocation = (function() {
};
});
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();
// If you have Gears installed use that
if (window.google && google.gears) {
navigator.geolocation = GearsGeoLocation();
}
})();