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/*
* 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;
}
/**
* @author: Eyad Aboulouz
* Bidi text reordering and reshaping by by calling native reorderReshapeBidiText function
* @param chs
* @param reshapedChs
* @param off
* @param len
* @return int
* @hide
*/
public static int reorderAndReshapeBidiText(char[] chs, char[] outputChs, int off, int len) {
if (chs == null)
throw new NullPointerException();
if (off < 0 || len < 0 || off + len > chs.length)
throw new IndexOutOfBoundsException();
return reorderReshapeBidiText(chs, outputChs, off, len);
}
/**
* @author: Eyad Aboulouz
* Arabic text reshaping by by calling native reshapeArabicText function
* @param chs
* @param map
* @param off
* @param len
* @return int
* @hide
*/
public static int reshapeReversedArabicText(char[] chs, char[] outputChs, int off, int len) {
if (chs == null)
throw new NullPointerException();
if (off < 0 || len < 0 || off + len > chs.length)
throw new IndexOutOfBoundsException();
return reshapeArabicText(chs, outputChs, off, len);
}
private native static int runBidi(int dir, char[] chs, byte[] chInfo, int n, boolean haveInfo);
private native static int reorderReshapeBidiText(char[] chs, char[] outputChs, int off, int len);
private native static int reshapeArabicText(char[] chs, char[] outputChs, int off, int len);
}
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