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/* -*- Mode: js; js-indent-level: 2; indent-tabs-mode: nil -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
/**
* This lib relies on `l10n.js' to implement localizable date/time strings.
*
* The proposed `DateTimeFormat' object should provide all the features that are
* planned for the `Intl.DateTimeFormat' constructor, but the API does not match
* exactly the ES-i18n draft.
* - https://bugzilla.mozilla.org/show_bug.cgi?id=769872
* - http://wiki.ecmascript.org/doku.php?id=globalization:specification_drafts
*
* Besides, this `DateTimeFormat' object provides two features that aren't
* planned in the ES-i18n spec:
* - a `toLocaleFormat()' that really works (i.e. fully translated);
* - a `fromNow()' method to handle relative dates ("pretty dates").
*
* WARNING: this library relies on the non-standard `toLocaleFormat()' method,
* which is specific to Firefox -- no other browser is supported.
*/
navigator.mozL10n.DateTimeFormat = function(locales, options) {
var _ = navigator.mozL10n.get;
// https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Date/toLocaleFormat
function localeFormat(d, format) {
var tokens = format.match(/(%E.|%O.|%.)/g);
for (var i = 0; tokens && i < tokens.length; i++) {
var value = '';
// http://pubs.opengroup.org/onlinepubs/007908799/xsh/strftime.html
switch (tokens[i]) {
// localized day/month names
case '%a':
value = _('weekday-' + d.getDay() + '-short');
break;
case '%A':
value = _('weekday-' + d.getDay() + '-long');
break;
case '%b':
case '%h':
value = _('month-' + d.getMonth() + '-short');
break;
case '%B':
value = _('month-' + d.getMonth() + '-long');
break;
// like %H, but in 12-hour format and without any leading zero
case '%I':
value = d.getHours() % 12 || 12;
break;
// like %d, without any leading zero
case '%e':
value = d.getDate();
break;
// localized date/time strings
case '%c':
case '%x':
case '%X':
// ensure the localized format string doesn't contain any %c|%x|%X
var tmp = _('dateTimeFormat_' + tokens[i]);
if (tmp && !(/(%c|%x|%X)/).test(tmp)) {
value = localeFormat(d, tmp);
}
break;
// other tokens don't require any localization
}
format = format.replace(tokens[i], value || d.toLocaleFormat(tokens[i]));
}
return format;
}
// variant of John Resig's PrettyDate.js
function prettyDate(time, useCompactFormat) {
switch (time.constructor) {
case String: // timestamp
time = parseInt(time);
break;
case Date:
time = time.getTime();
break;
}
var secDiff = (Date.now() - time) / 1000;
if (isNaN(secDiff)) {
return _('incorrectDate');
}
var f = useCompactFormat ? '-short' : '-long';
if (secDiff >= 0) { // past
var dayDiff = Math.floor(secDiff / 86400);
if (secDiff < 3600) {
return _('minutesAgo' + f, { m: Math.floor(secDiff / 60) });
} else if (dayDiff === 0) {
return _('hoursAgo' + f, { h: Math.floor(secDiff / 3600) });
} else if (dayDiff < 10) {
return _('daysAgo' + f, { d: dayDiff });
}
}
if (secDiff < 0) { // future
secDiff = -secDiff;
dayDiff = Math.floor(secDiff / 86400);
if (secDiff < 3600) {
return _('inMinutes' + f, { m: Math.floor(secDiff / 60) });
} else if (dayDiff === 0) {
return _('inHours' + f, { h: Math.floor(secDiff / 3600) });
} else if (dayDiff < 10) {
return _('inDays' + f, { d: dayDiff });
}
}
// too far: return an absolute date
return localeFormat(new Date(time), '%x');
}
// API
return {
localeDateString: function localeDateString(d) {
return localeFormat(d, '%x');
},
localeTimeString: function localeTimeString(d) {
return localeFormat(d, '%X');
},
localeString: function localeString(d) {
return localeFormat(d, '%c');
},
localeFormat: localeFormat,
fromNow: prettyDate
};
};
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