| /* |
| * 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); |
| } |