1 files changed, 65 insertions, 0 deletions
diff --git a/intl/lwbrk/WordBreaker.h b/intl/lwbrk/WordBreaker.h
new file mode 100644
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+++ b/intl/lwbrk/WordBreaker.h
@@ -0,0 +1,65 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+#ifndef mozilla_intl_WordBreaker_h__
+#define mozilla_intl_WordBreaker_h__
+
+#include <cstdint>
+
+#define NS_WORDBREAKER_NEED_MORE_TEXT -1
+
+namespace mozilla {
+namespace intl {
+
+struct WordRange {
+  uint32_t mBegin;
+  uint32_t mEnd;
+};
+
+class WordBreaker final {
+ public:
+  // WordBreaker is a utility class with only static methods. No need to
+  // instantiate it.
+  WordBreaker() = delete;
+  ~WordBreaker() = delete;
+
+  // Find the word boundary by scanning forward and backward from aPos.
+  //
+  // @return WordRange where mBegin equals to the offset to first character in
+  // the word and mEnd equals to the offset to the last character plus 1. mEnd
+  // can be aLen if the desired word is at the end of aText.
+  //
+  // If aPos is already at the end of aText or beyond, both mBegin and mEnd
+  // equals to aLen.
+  static WordRange FindWord(const char16_t* aText, uint32_t aLen,
+                            uint32_t aPos);
+
+  // Find the next word break opportunity starting from aPos + 1. It can return
+  // aLen if there's no break opportunity between [aPos + 1, aLen - 1].
+  //
+  // If aPos is already at the end of aText or beyond, i.e. aPos >= aLen, return
+  // NS_WORDBREAKER_NEED_MORE_TEXT.
+  //
+  // DEPRECATED: Use WordBreakIteratorUtf16 instead.
+  static int32_t Next(const char16_t* aText, uint32_t aLen, uint32_t aPos);
+
+ private:
+  enum WordBreakClass : uint8_t {
+    kWbClassSpace = 0,
+    kWbClassAlphaLetter,
+    kWbClassPunct,
+    kWbClassHanLetter,
+    kWbClassKatakanaLetter,
+    kWbClassHiraganaLetter,
+    kWbClassHWKatakanaLetter,
+    kWbClassScriptioContinua
+  };
+
+  static WordBreakClass GetClass(char16_t aChar);
+};
+
+}  // namespace intl
+}  // namespace mozilla
+
+#endif /* mozilla_intl_WordBreaker_h__ */