1 files changed, 47 insertions, 0 deletions
diff --git a/include/minikin/GraphemeBreak.h b/include/minikin/GraphemeBreak.h
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+++ b/include/minikin/GraphemeBreak.h
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+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINIKIN_GRAPHEME_BREAK_H
+#define MINIKIN_GRAPHEME_BREAK_H
+
+namespace android {
+
+class GraphemeBreak {
+public:
+    // These values must be kept in sync with CURSOR_AFTER etc in Paint.java
+    enum MoveOpt {
+        AFTER = 0,
+        AT_OR_AFTER = 1,
+        BEFORE = 2,
+        AT_OR_BEFORE = 3,
+        AT = 4
+    };
+
+    // Determine whether the given offset is a grapheme break.
+    // This implementation generally follows Unicode TR29 extended
+    // grapheme break, but with some tweaks to more closely match
+    // existing implementations.
+    static bool isGraphemeBreak(const uint16_t* buf, size_t start, size_t count, size_t offset);
+
+    // Matches Android's Java API. Note, return (size_t)-1 for AT to
+    // signal non-break because unsigned return type.
+    static size_t getTextRunCursor(const uint16_t* buf, size_t start, size_t count,
+            size_t offset, MoveOpt opt);
+};
+
+}  // namespace android
+
+#endif  // MINIKIN_GRAPHEME_BREAK_H
+\ No newline at end of file