b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
49 lines
1.7 KiB
JavaScript
Executable file
49 lines
1.7 KiB
JavaScript
Executable file
/**
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* Shim for navigator.mozHour12 API.
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* Send `localechanged` event if mozHour12 is changed.
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*
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* App need include following permission in manifest:
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*
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* "settings":{ "access": "readonly" }
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*/
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(function(){
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'use strict';
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// not polyfill if API already exists
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if (window.navigator.mozHour12 || window.navigator.hour12) {return;}
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// mock mozHour12 onto window.navigator
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window.navigator.mozHour12 = undefined;
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// set hour12 and emit the locale change event if value changed
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var _setMozHour12 = function(result) {
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if (result === null) {
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// locale.hour12 may be true, false, `undefined` or `null`.
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// We can't write to mozSettings with `undefined`, but we want to cast
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// null to be undefined because then we can easily assign
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// Intl hour12: navigator.mozHour12 which is a paradigm we want to use.
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//
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// if you set hour12 to undefined it uses automatic value, but it doesn't
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// work if you set it to `null`, so we cast here to `undefined`.
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result = undefined;
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}
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if (window.navigator.mozHour12 !== result) {
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window.navigator.mozHour12 = result;
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// emit the locale change event
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window.dispatchEvent(new CustomEvent('timeformatchange'));
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}
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};
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// handler observer event
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var _hour12Handler = function(event) {
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_setMozHour12(event.settingValue);
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};
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var _kLocaleTime = 'locale.hour12';
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// update mozHour12 to real value
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var req = window.navigator.mozSettings.createLock().get(_kLocaleTime);
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req.onsuccess = function() {
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_setMozHour12(req.result[_kLocaleTime]);
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};
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// monitor settings changes
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window.navigator.mozSettings.addObserver(_kLocaleTime, _hour12Handler);
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})();
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