diff options
Diffstat (limited to 'core/java')
| -rw-r--r-- | core/java/android/text/AndroidBidi.java | 48 |
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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