Add support for accessing native bidi implementation via jni.

Include a simple test to verify that the bidi code works.

1 files changed, 48 insertions, 0 deletions

diff --git a/core/java/android/text/AndroidBidi.java b/core/java/android/text/AndroidBidi.java
new file mode 100644
index 0000000..e4f934e
--- /dev/null
+++ b/core/java/android/text/AndroidBidi.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+package android.text;
+
+/**
+ * Access the ICU bidi implementation.
+ * @hide
+ */
+/* package */ class AndroidBidi {
+
+    public static int bidi(int dir, char[] chs, byte[] chInfo, int n, boolean haveInfo) {
+        if (chs == null || chInfo == null) {
+            throw new NullPointerException();
+        }
+
+        if (n < 0 || chs.length < n || chInfo.length < n) {
+            throw new IndexOutOfBoundsException();
+        }
+
+        switch(dir) {
+            case Layout.DIR_REQUEST_LTR: dir = 0; break;
+            case Layout.DIR_REQUEST_RTL: dir = 1; break;
+            case Layout.DIR_REQUEST_DEFAULT_LTR: dir = -2; break;
+            case Layout.DIR_REQUEST_DEFAULT_RTL: dir = -1; break;
+            default: dir = 0; break;
+        }
+
+        int result = runBidi(dir, chs, chInfo, n, haveInfo);
+        result = (result & 0x1) == 0 ? Layout.DIR_LEFT_TO_RIGHT : Layout.DIR_RIGHT_TO_LEFT;
+        return result;
+    }
+
+    private native static int runBidi(int dir, char[] chs, byte[] chInfo, int n, boolean haveInfo);
+}
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