M7350/base/core/java/android/text/AndroidCharacter.java

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2024-09-09 08:52:07 +00:00
/*
* Copyright (C) 2006 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;
/**
* AndroidCharacter exposes some character properties that are not
* easily accessed from java.lang.Character.
*/
public class AndroidCharacter
{
public static final int EAST_ASIAN_WIDTH_NEUTRAL = 0;
public static final int EAST_ASIAN_WIDTH_AMBIGUOUS = 1;
public static final int EAST_ASIAN_WIDTH_HALF_WIDTH = 2;
public static final int EAST_ASIAN_WIDTH_FULL_WIDTH = 3;
public static final int EAST_ASIAN_WIDTH_NARROW = 4;
public static final int EAST_ASIAN_WIDTH_WIDE = 5;
/**
* Fill in the first <code>count</code> bytes of <code>dest</code> with the
* directionalities from the first <code>count</code> chars of <code>src</code>.
* This is just like Character.getDirectionality() except it is a
* batch operation.
*/
public native static void getDirectionalities(char[] src, byte[] dest,
int count);
/**
* Calculate the East Asian Width of a character according to
* <a href="http://unicode.org/reports/tr11/">Unicode TR#11</a>. The return
* will be one of {@link #EAST_ASIAN_WIDTH_NEUTRAL},
* {@link #EAST_ASIAN_WIDTH_AMBIGUOUS}, {@link #EAST_ASIAN_WIDTH_HALF_WIDTH},
* {@link #EAST_ASIAN_WIDTH_FULL_WIDTH}, {@link #EAST_ASIAN_WIDTH_NARROW},
* or {@link #EAST_ASIAN_WIDTH_WIDE}.
*
* @param input the character to measure
* @return the East Asian Width for input
*/
public native static int getEastAsianWidth(char input);
/**
* Fill the first <code>count</code> bytes of <code>dest</code> with the
* East Asian Width from <code>count</code> chars of <code>src</code>
* starting at <code>start</code>. East Asian Width is calculated based on
* <a href="http://unicode.org/reports/tr11/">Unicode TR#11</a>. Each entry
* in <code>dest</code> will be one of {@link #EAST_ASIAN_WIDTH_NEUTRAL},
* {@link #EAST_ASIAN_WIDTH_AMBIGUOUS}, {@link #EAST_ASIAN_WIDTH_HALF_WIDTH},
* {@link #EAST_ASIAN_WIDTH_FULL_WIDTH}, {@link #EAST_ASIAN_WIDTH_NARROW},
* or {@link #EAST_ASIAN_WIDTH_WIDE}.
*
* @param src character array of input to measure
* @param start first character in array to measure
* @param count maximum number of characters to measure
* @param dest byte array of results for each character in src
*/
public native static void getEastAsianWidths(char[] src, int start,
int count, byte[] dest);
/**
* Replace the specified slice of <code>text</code> with the chars'
* right-to-left mirrors (if any), returning true if any
* replacements were made.
*
* @param text array of characters to apply mirror operation
* @param start first character in array to mirror
* @param count maximum number of characters to mirror
* @return true if replacements were made
*/
public native static boolean mirror(char[] text, int start, int count);
/**
* Return the right-to-left mirror (or the original char if none)
* of the specified char.
*/
public native static char getMirror(char ch);
}