1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
// 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
(function() {
// We are already defined. Hooray!
if (window.google && google.gears) {
return;
}
var factory = null;
// Firefox
if (typeof GearsFactory != 'undefined') {
factory = new GearsFactory();
} else {
// IE
try {
factory = new ActiveXObject('Gears.Factory');
// privateSetGlobalObject is only required and supported on WinCE.
if (factory.getBuildInfo().indexOf('ie_mobile') != -1) {
factory.privateSetGlobalObject(this);
}
} catch (e) {
// Safari
if ((typeof navigator.mimeTypes != 'undefined')
&& navigator.mimeTypes["application/x-googlegears"]) {
factory = document.createElement("object");
factory.style.display = "none";
factory.width = 0;
factory.height = 0;
factory.type = "application/x-googlegears";
document.documentElement.appendChild(factory);
}
}
}
// *Do not* define any objects if Gears is not installed. This mimics the
// behavior of Gears defining the objects in the future.
if (!factory) {
return;
}
// Now set up the objects, being careful not to overwrite anything.
//
// Note: In Internet Explorer for Windows Mobile, you can't add properties to
// the window object. However, global objects are automatically added as
// properties of the window object in all browsers.
if (!window.google) {
google = {};
}
if (!google.gears) {
google.gears = {factory: factory};
}
})();
// -- END GEARS_INIT
var GearsGeoLocation = (function() {
// -- PRIVATE
var geo = google.gears.factory.create('beta.geolocation');
var wrapSuccess = function(callback, self) { // wrap it for lastPosition love
return function(position) {
callback(position);
self.lastPosition = position;
}
}
// -- PUBLIC
return {
shim: true,
type: "Gears",
lastPosition: null,
getCurrentPosition: function(successCallback, errorCallback, options) {
var self = this;
var sc = wrapSuccess(successCallback, self);
geo.getCurrentPosition(sc, errorCallback, options);
},
watchPosition: function(successCallback, errorCallback, options) {
geo.watchPosition(successCallback, errorCallback, options);
},
clearWatch: function(watchId) {
geo.clearWatch(watchId);
},
getPermission: function(siteName, imageUrl, extraMessage) {
geo.getPermission(siteName, imageUrl, extraMessage);
}
};
});
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();
})();
|
