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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#if JS_HAS_INTL_API
// This cache, once primed, has these properties:
//
// runtimeDefaultLocale:
// Locale information provided by the embedding, guiding SpiderMonkey's
// selection of a default locale. See RuntimeDefaultLocale(), whose
// value controls the value returned by DefaultLocale() that's what's
// *actually* used.
// icuDefaultTimeZone:
// Time zone information provided by ICU. See intl_defaultTimeZone(),
// whose value controls the value returned by DefaultTimeZone() that's
// what's *actually* used.
// formatters:
// A Record storing formatters consistent with the above
// runtimeDefaultLocale/localTZA values, for use with the appropriate
// ES6 toLocale*String Date method when called with its first two
// arguments having the value |undefined|.
//
// The "formatters" Record has (some subset of) these properties, as determined
// by all values of the first argument passed to |GetCachedFormat|:
//
// dateTimeFormat: for Date's toLocaleString operation
// dateFormat: for Date's toLocaleDateString operation
// timeFormat: for Date's toLocaleTimeString operation
//
// Using this cache, then, requires
// 1) verifying the current runtimeDefaultLocale/icuDefaultTimeZone are
// consistent with cached values, then
// 2) seeing if the desired formatter is cached and returning it if so, or else
// 3) create the desired formatter and store and return it.
var dateTimeFormatCache = new Record();
/**
* Get a cached DateTimeFormat formatter object, created like so:
*
* var opts = ToDateTimeOptions(undefined, required, defaults);
* return new Intl.DateTimeFormat(undefined, opts);
*
* |format| must be a key from the "formatters" Record described above.
*/
function GetCachedFormat(format, required, defaults) {
assert(format === "dateTimeFormat" ||
format === "dateFormat" ||
format === "timeFormat",
"unexpected format key: please update the comment by " +
"dateTimeFormatCache");
var formatters;
if (!IsRuntimeDefaultLocale(dateTimeFormatCache.runtimeDefaultLocale) ||
!intl_isDefaultTimeZone(dateTimeFormatCache.icuDefaultTimeZone))
{
formatters = dateTimeFormatCache.formatters = new Record();
dateTimeFormatCache.runtimeDefaultLocale = RuntimeDefaultLocale();
dateTimeFormatCache.icuDefaultTimeZone = intl_defaultTimeZone();
} else {
formatters = dateTimeFormatCache.formatters;
}
var fmt = formatters[format];
if (fmt === undefined) {
var options = ToDateTimeOptions(undefined, required, defaults);
fmt = formatters[format] = intl_DateTimeFormat(undefined, options);
}
return fmt;
}
/**
* Format this Date object into a date and time string, using the locale and
* formatting options provided.
*
* Spec: ECMAScript Language Specification, 5.1 edition, 15.9.5.5.
* Spec: ECMAScript Internationalization API Specification, 13.3.1.
*/
function Date_toLocaleString() {
// Steps 1-2.
var x = callFunction(ThisTimeValue, this, DATE_METHOD_LOCALE_STRING);
if (Number_isNaN(x))
return "Invalid Date";
// Steps 3-4.
var locales = arguments.length > 0 ? arguments[0] : undefined;
var options = arguments.length > 1 ? arguments[1] : undefined;
// Step 5-6.
var dateTimeFormat;
if (locales === undefined && options === undefined) {
// This cache only optimizes for the old ES5 toLocaleString without
// locales and options.
dateTimeFormat = GetCachedFormat("dateTimeFormat", "any", "all");
} else {
options = ToDateTimeOptions(options, "any", "all");
dateTimeFormat = intl_DateTimeFormat(locales, options);
}
// Step 7.
return intl_FormatDateTime(dateTimeFormat, x, /* formatToParts = */ false);
}
/**
* Format this Date object into a date string, using the locale and formatting
* options provided.
*
* Spec: ECMAScript Language Specification, 5.1 edition, 15.9.5.6.
* Spec: ECMAScript Internationalization API Specification, 13.3.2.
*/
function Date_toLocaleDateString() {
// Steps 1-2.
var x = callFunction(ThisTimeValue, this, DATE_METHOD_LOCALE_DATE_STRING);
if (Number_isNaN(x))
return "Invalid Date";
// Steps 3-4.
var locales = arguments.length > 0 ? arguments[0] : undefined;
var options = arguments.length > 1 ? arguments[1] : undefined;
// Step 5-6.
var dateTimeFormat;
if (locales === undefined && options === undefined) {
// This cache only optimizes for the old ES5 toLocaleDateString without
// locales and options.
dateTimeFormat = GetCachedFormat("dateFormat", "date", "date");
} else {
options = ToDateTimeOptions(options, "date", "date");
dateTimeFormat = intl_DateTimeFormat(locales, options);
}
// Step 7.
return intl_FormatDateTime(dateTimeFormat, x, /* formatToParts = */ false);
}
/**
* Format this Date object into a time string, using the locale and formatting
* options provided.
*
* Spec: ECMAScript Language Specification, 5.1 edition, 15.9.5.7.
* Spec: ECMAScript Internationalization API Specification, 13.3.3.
*/
function Date_toLocaleTimeString() {
// Steps 1-2.
var x = callFunction(ThisTimeValue, this, DATE_METHOD_LOCALE_TIME_STRING);
if (Number_isNaN(x))
return "Invalid Date";
// Steps 3-4.
var locales = arguments.length > 0 ? arguments[0] : undefined;
var options = arguments.length > 1 ? arguments[1] : undefined;
// Step 5-6.
var dateTimeFormat;
if (locales === undefined && options === undefined) {
// This cache only optimizes for the old ES5 toLocaleTimeString without
// locales and options.
dateTimeFormat = GetCachedFormat("timeFormat", "time", "time");
} else {
options = ToDateTimeOptions(options, "time", "time");
dateTimeFormat = intl_DateTimeFormat(locales, options);
}
// Step 7.
return intl_FormatDateTime(dateTimeFormat, x, /* formatToParts = */ false);
}
#endif // JS_HAS_INTL_API
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