Add Hyphenation class

third_party/WebKit/Source/platform/text/Hyphenation.h

+// Copyright 2016 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.
+
+#ifndef Hyphenation_h
+#define Hyphenation_h
+
+#include "platform/PlatformExport.h"
+#include "wtf/Forward.h"
+#include "wtf/HashMap.h"
+#include "wtf/RefCounted.h"
+#include "wtf/text/AtomicStringHash.h"
+#include "wtf/text/StringHash.h"
+
+namespace blink {
+
+class StringView;
+
+class PLATFORM_EXPORT Hyphenation : public RefCounted<Hyphenation> {
+public:
+    virtual ~Hyphenation() {}
+
+    static Hyphenation* get(const AtomicString& locale);
+
+    virtual size_t lastHyphenLocation(const StringView&, size_t beforeIndex, const AtomicString& locale) const = 0;
+
+    static void setForTesting(const AtomicString& locale, PassRefPtr<Hyphenation>);
+    static void clearForTesting();
+
+private:
+    using HyphenationMap = HashMap<AtomicString, RefPtr<Hyphenation>, CaseFoldingHash>;
+
+    static HyphenationMap& getHyphenationMap();
+    static PassRefPtr<Hyphenation> platformGetHyphenation(const AtomicString& locale);
+};
+
+} // namespace blink
+
+#endif // Hyphenation_h