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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_TEXT_LAYOUT_LOCALE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_TEXT_LAYOUT_LOCALE_H_
#include "base/memory/raw_ptr.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/text/hyphenation.h"
#include "third_party/blink/renderer/platform/text/quotes_data.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/std_lib_extras.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string_hash.h"
#include "third_party/blink/renderer/platform/wtf/text/case_map.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include <unicode/uscript.h>
struct hb_language_impl_t;
namespace blink {
// A Unicode Line Break Style Identifier (key "lb".)
// https://www.unicode.org/reports/tr35/#UnicodeLineBreakStyleIdentifier
enum class LineBreakStrictness : uint8_t { kDefault, kNormal, kStrict, kLoose };
class PLATFORM_EXPORT LayoutLocale : public RefCounted<LayoutLocale> {
USING_FAST_MALLOC(LayoutLocale);
public:
static const LayoutLocale* Get(const AtomicString& locale);
static const LayoutLocale& GetDefault();
static const LayoutLocale& GetSystem();
static const LayoutLocale& ValueOrDefault(const LayoutLocale* locale) {
return locale ? *locale : GetDefault();
}
bool operator==(const LayoutLocale& other) const {
return string_ == other.string_;
}
bool operator!=(const LayoutLocale& other) const {
return string_ != other.string_;
}
const AtomicString& LocaleString() const { return string_; }
static const AtomicString& LocaleString(const LayoutLocale* locale) {
return locale ? locale->string_ : g_null_atom;
}
operator const AtomicString&() const { return string_; }
std::string Ascii() const { return string_.Ascii(); }
const hb_language_impl_t* HarfbuzzLanguage() const {
return harfbuzz_language_;
}
const char* LocaleForSkFontMgr() const;
UScriptCode GetScript() const { return script_; }
// Disambiguation of the Unified Han Ideographs.
UScriptCode GetScriptForHan() const;
bool HasScriptForHan() const;
static const LayoutLocale* LocaleForHan(const LayoutLocale*);
const char* LocaleForHanForSkFontMgr() const;
// The normalized locale data to construct |CaseMap| from.
const CaseMap::Locale& CaseMapLocale() const {
if (case_map_computed_)
return locale_for_case_map_;
ComputeCaseMapLocale();
return locale_for_case_map_;
}
Hyphenation* GetHyphenation() const;
scoped_refptr<QuotesData> GetQuotesData() const;
AtomicString LocaleWithBreakKeyword(LineBreakStrictness,
bool use_phrase = false) const;
static scoped_refptr<LayoutLocale> CreateForTesting(const AtomicString&);
static void SetHyphenationForTesting(const AtomicString&,
scoped_refptr<Hyphenation>);
static void AcceptLanguagesChanged(const String&);
static void ClearForTesting();
private:
explicit LayoutLocale(const AtomicString&);
void ComputeScriptForHan() const;
void ComputeCaseMapLocale() const;
AtomicString string_;
mutable std::string string_for_sk_font_mgr_;
mutable CaseMap::Locale locale_for_case_map_;
mutable scoped_refptr<Hyphenation> hyphenation_;
mutable scoped_refptr<QuotesData> quotes_data_;
// hb_language_t is defined in hb.h, which not all files can include.
raw_ptr<const hb_language_impl_t> harfbuzz_language_;
UScriptCode script_;
mutable UScriptCode script_for_han_;
mutable unsigned has_script_for_han_ : 1;
mutable unsigned hyphenation_computed_ : 1;
mutable unsigned quotes_data_computed_ : 1;
mutable unsigned case_map_computed_ : 1;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_TEXT_LAYOUT_LOCALE_H_
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