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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This file contains implementation details, the public interface is declared
// in time_format.h.
#ifndef UI_BASE_L10N_FORMATTER_H_
#define UI_BASE_L10N_FORMATTER_H_
#include <memory>
#include "base/lazy_instance.h"
#include "base/macros.h"
#include "third_party/icu/source/common/unicode/unistr.h"
#include "third_party/icu/source/i18n/unicode/msgfmt.h"
#include "third_party/icu/source/i18n/unicode/plurrule.h"
#include "ui/base/l10n/time_format.h"
#include "ui/base/ui_base_export.h"
namespace ui {
struct Pluralities;
// Formatter for a (format, length) combination. May either be instantiated
// with four parameters for use in TimeFormat::Simple() or with ten parameters
// for use in TimeFormat::Detailed().
class Formatter {
public:
enum Unit {
UNIT_SEC,
UNIT_MIN,
UNIT_HOUR,
UNIT_DAY,
UNIT_COUNT // Enum size counter, not a unit. Must be last.
};
enum TwoUnits {
TWO_UNITS_MIN_SEC,
TWO_UNITS_HOUR_MIN,
TWO_UNITS_DAY_HOUR,
TWO_UNITS_COUNT // Enum size counter, not a unit pair. Must be last.
};
Formatter(const Pluralities& sec_pluralities,
const Pluralities& min_pluralities,
const Pluralities& hour_pluralities,
const Pluralities& day_pluralities);
Formatter(const Pluralities& sec_pluralities,
const Pluralities& min_pluralities,
const Pluralities& hour_pluralities,
const Pluralities& day_pluralities,
const Pluralities& min_sec_pluralities1,
const Pluralities& min_sec_pluralities2,
const Pluralities& hour_min_pluralities1,
const Pluralities& hour_min_pluralities2,
const Pluralities& day_hour_pluralities1,
const Pluralities& day_hour_pluralities2);
void Format(Unit unit, int value, icu::UnicodeString* formatted_string) const;
void Format(TwoUnits units,
int value_1,
int value_2,
icu::UnicodeString* formatted_string) const;
private:
// Create a hard-coded fallback message format for plural formatting.
// This will never be called unless translators make a mistake.
std::unique_ptr<icu::MessageFormat> CreateFallbackFormat(
const icu::PluralRules& rules,
const Pluralities& pluralities) const;
std::unique_ptr<icu::MessageFormat> InitFormat(
const Pluralities& pluralities);
std::unique_ptr<icu::MessageFormat> simple_format_[UNIT_COUNT];
std::unique_ptr<icu::MessageFormat> detailed_format_[TWO_UNITS_COUNT][2];
DISALLOW_IMPLICIT_CONSTRUCTORS(Formatter);
};
// Class to hold all Formatters, intended to be used in a global LazyInstance.
class UI_BASE_EXPORT FormatterContainer {
public:
FormatterContainer();
~FormatterContainer();
const Formatter* Get(TimeFormat::Format format,
TimeFormat::Length length) const;
void ResetForTesting() {
Shutdown();
Initialize();
}
private:
void Initialize();
void Shutdown();
std::unique_ptr<Formatter> formatter_[TimeFormat::FORMAT_COUNT]
[TimeFormat::LENGTH_COUNT];
DISALLOW_COPY_AND_ASSIGN(FormatterContainer);
};
// Windows compilation requires full definition of FormatterContainer before
// LazyInstance<FormatterContainter> may be declared.
extern UI_BASE_EXPORT base::LazyInstance<FormatterContainer> g_container;
// For use in unit tests only.
extern UI_BASE_EXPORT bool formatter_force_fallback;
} // namespace ui
#endif // UI_BASE_L10N_FORMATTER_H_