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
|
/* -*- Mode: js; js-indent-level: 2; indent-tabs-mode: nil -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
function tzSelect(regionSelector, citySelector, onchange) {
var TIMEZONE_FILE = '/shared/resources/tz.json';
/**
* Activate a timezone selector UI
*/
function newTZSelector(onchangeTZ, currentID) {
var gRegion = currentID.replace(/\/.*/, '');
var gCity = currentID.replace(/.*?\//, '');
var gTZ = null;
function loadTZ(callback) {
var xhr = new XMLHttpRequest();
xhr.open('GET', TIMEZONE_FILE, true);
xhr.responseType = 'json';
xhr.onreadystatechange = function() {
if (xhr.readyState == 4) {
if (xhr.status == 200 || xhr.status === 0) {
gTZ = xhr.response;
}
callback();
}
};
xhr.send();
}
function fillSelectElement(selector, options) {
selector.innerHTML = '';
options.sort(function(a, b) {
return (a.text > b.text);
});
for (var i = 0; i < options.length; i++) {
var option = document.createElement('option');
option.textContent = options[i].text;
option.selected = options[i].selected;
option.value = options[i].value;
selector.appendChild(option);
}
}
function getSelectedText(selector) {
var options = selector.querySelectorAll('option');
return options[selector.selectedIndex].textContent;
}
function fillRegions() {
var _ = navigator.mozL10n.get;
var options = [];
for (var c in gTZ) {
options.push({
text: _('tzRegion-' + c) || c,
value: c,
selected: (c == gRegion)
});
}
fillSelectElement(regionSelector, options);
fillCities();
}
function fillCities() {
gRegion = regionSelector.value;
var list = gTZ[gRegion];
var options = [];
for (var i = 0; i < list.length; i++) {
options.push({
text: list[i].name || list[i].city.replace(/_/g, ' '),
value: i,
selected: (list[i].city == gCity)
});
}
fillSelectElement(citySelector, options);
setTimezone();
}
function setTimezone() {
var res = gTZ[gRegion][citySelector.value];
gCity = res.city;
var offset = res.offset.split(',');
onchangeTZ({
id: res.id || gRegion + '/' + res.city,
region: getSelectedText(regionSelector),
city: getSelectedText(citySelector),
cc: res.cc,
utcOffset: offset[0],
dstOffset: offset[1]
});
}
regionSelector.onchange = fillCities;
citySelector.onchange = setTimezone;
loadTZ(fillRegions);
}
/**
* Monitor time.timezone changes
*/
function newTZObserver() {
var settings = window.navigator.mozSettings;
if (!settings)
return;
settings.addObserver('time.timezone', function(event) {
setTimezoneDescription(event.settingValue);
});
var reqTimezone = settings.createLock().get('time.timezone');
reqTimezone.onsuccess = function dt_getStatusSuccess() {
var lastMozSettingValue = reqTimezone.result['time.timezone'];
if (!lastMozSettingValue) {
lastMozSettingValue = 'Pacific/Pago_Pago';
}
setTimezoneDescription(lastMozSettingValue);
// initialize the timezone selector with the initial TZ setting
newTZSelector(function updateTZ(tz) {
var req = settings.createLock().set({ 'time.timezone': tz.id });
if (onchange) {
req.onsuccess = function updateTZ_callback() {
// Wait until the timezone is actually set
// before calling the callback.
window.addEventListener('moztimechange', function timeChanged() {
window.removeEventListener('moztimechange', timeChanged);
onchange(tz);
});
}
}
}, lastMozSettingValue);
console.log('Initial TZ value: ' + lastMozSettingValue);
};
function setTimezoneDescription(timezoneID) {
regionSelector.value = timezoneID.replace(/\/.*/, '');
citySelector.value = timezoneID.replace(/.*?\//, '');
}
}
/**
* Startup -- make sure webL10n is ready before using tzSelect()
*/
newTZObserver();
}
|
