90 lines
3.7 KiB
Java
90 lines
3.7 KiB
Java
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.text;
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/**
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* AndroidCharacter exposes some character properties that are not
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* easily accessed from java.lang.Character.
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*/
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public class AndroidCharacter
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{
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public static final int EAST_ASIAN_WIDTH_NEUTRAL = 0;
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public static final int EAST_ASIAN_WIDTH_AMBIGUOUS = 1;
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public static final int EAST_ASIAN_WIDTH_HALF_WIDTH = 2;
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public static final int EAST_ASIAN_WIDTH_FULL_WIDTH = 3;
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public static final int EAST_ASIAN_WIDTH_NARROW = 4;
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public static final int EAST_ASIAN_WIDTH_WIDE = 5;
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/**
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* Fill in the first <code>count</code> bytes of <code>dest</code> with the
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* directionalities from the first <code>count</code> chars of <code>src</code>.
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* This is just like Character.getDirectionality() except it is a
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* batch operation.
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*/
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public native static void getDirectionalities(char[] src, byte[] dest,
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int count);
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/**
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* Calculate the East Asian Width of a character according to
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* <a href="http://unicode.org/reports/tr11/">Unicode TR#11</a>. The return
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* will be one of {@link #EAST_ASIAN_WIDTH_NEUTRAL},
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* {@link #EAST_ASIAN_WIDTH_AMBIGUOUS}, {@link #EAST_ASIAN_WIDTH_HALF_WIDTH},
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* {@link #EAST_ASIAN_WIDTH_FULL_WIDTH}, {@link #EAST_ASIAN_WIDTH_NARROW},
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* or {@link #EAST_ASIAN_WIDTH_WIDE}.
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*
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* @param input the character to measure
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* @return the East Asian Width for input
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*/
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public native static int getEastAsianWidth(char input);
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/**
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* Fill the first <code>count</code> bytes of <code>dest</code> with the
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* East Asian Width from <code>count</code> chars of <code>src</code>
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* starting at <code>start</code>. East Asian Width is calculated based on
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* <a href="http://unicode.org/reports/tr11/">Unicode TR#11</a>. Each entry
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* in <code>dest</code> will be one of {@link #EAST_ASIAN_WIDTH_NEUTRAL},
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* {@link #EAST_ASIAN_WIDTH_AMBIGUOUS}, {@link #EAST_ASIAN_WIDTH_HALF_WIDTH},
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* {@link #EAST_ASIAN_WIDTH_FULL_WIDTH}, {@link #EAST_ASIAN_WIDTH_NARROW},
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* or {@link #EAST_ASIAN_WIDTH_WIDE}.
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*
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* @param src character array of input to measure
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* @param start first character in array to measure
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* @param count maximum number of characters to measure
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* @param dest byte array of results for each character in src
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*/
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public native static void getEastAsianWidths(char[] src, int start,
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int count, byte[] dest);
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/**
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* Replace the specified slice of <code>text</code> with the chars'
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* right-to-left mirrors (if any), returning true if any
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* replacements were made.
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*
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* @param text array of characters to apply mirror operation
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* @param start first character in array to mirror
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* @param count maximum number of characters to mirror
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* @return true if replacements were made
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*/
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public native static boolean mirror(char[] text, int start, int count);
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/**
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* Return the right-to-left mirror (or the original char if none)
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* of the specified char.
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*/
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public native static char getMirror(char ch);
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}
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