580 lines
21 KiB
Java
580 lines
21 KiB
Java
/**
|
|
*******************************************************************************
|
|
* Copyright (C) 1996-2001, International Business Machines Corporation and *
|
|
* others. All Rights Reserved. *
|
|
*******************************************************************************
|
|
*
|
|
* $Source: /xsrl/Nsvn/icu/unicodetools/com/ibm/text/UCD/Normalizer.java,v $
|
|
* $Date: 2004/04/17 18:21:39 $
|
|
* $Revision: 1.16 $
|
|
*
|
|
*******************************************************************************
|
|
*/
|
|
|
|
package com.ibm.text.UCD;
|
|
|
|
import java.util.*;
|
|
import com.ibm.icu.text.UTF16;
|
|
|
|
import com.ibm.text.utility.*;
|
|
|
|
|
|
/**
|
|
* Implements Unicode Normalization Forms C, D, KC, KD.<br>
|
|
* See UTR#15 for details.<br>
|
|
* Copyright © 1998-1999 Unicode, Inc. All Rights Reserved.<br>
|
|
* The Unicode Consortium makes no expressed or implied warranty of any
|
|
* kind, and assumes no liability for errors or omissions.
|
|
* No liability is assumed for incidental and consequential damages
|
|
* in connection with or arising out of the use of the information here.
|
|
* @author Mark Davis
|
|
*/
|
|
|
|
public final class Normalizer implements UCD_Types {
|
|
public static final String copyright =
|
|
"Copyright (C) 2000, IBM Corp. and others. All Rights Reserved.";
|
|
|
|
public static boolean SHOW_PROGRESS = false;
|
|
|
|
/**
|
|
* Create a normalizer for a given form.
|
|
*/
|
|
public Normalizer(byte form, String unicodeVersion) {
|
|
this.form = form;
|
|
this.composition = (form & NF_COMPOSITION_MASK) != 0;
|
|
this.compatibility = (form & NF_COMPATIBILITY_MASK) != 0;
|
|
this.data = getData(unicodeVersion);
|
|
}
|
|
|
|
/**
|
|
* Create a normalizer for a given form.
|
|
*/
|
|
// public Normalizer(byte form) {
|
|
// this(form,"");
|
|
//}
|
|
|
|
/**
|
|
* Return string name
|
|
*/
|
|
public static String getName(byte form) {
|
|
return UCD_Names.NF_NAME[form];
|
|
}
|
|
|
|
/**
|
|
* Return string name
|
|
*/
|
|
public String getName() {
|
|
return getName(form);
|
|
}
|
|
|
|
/**
|
|
* Return string name
|
|
*/
|
|
public String getUCDVersion() {
|
|
return data.getUCDVersion();
|
|
}
|
|
|
|
/**
|
|
* Does compose?
|
|
*/
|
|
public boolean isComposition() {
|
|
return composition;
|
|
}
|
|
|
|
/**
|
|
* Does compose?
|
|
*/
|
|
public boolean isCompatibility() {
|
|
return compatibility;
|
|
}
|
|
|
|
/**
|
|
* Normalizes text according to the chosen form,
|
|
* replacing contents of the target buffer.
|
|
* @param source the original text, unnormalized
|
|
* @param target the resulting normalized text
|
|
*/
|
|
public StringBuffer normalize(String source, StringBuffer target) {
|
|
|
|
// First decompose the source into target,
|
|
// then compose if the form requires.
|
|
|
|
if (source.length() != 0) {
|
|
internalDecompose(source, target, true, compatibility);
|
|
if (composition) {
|
|
internalCompose(target);
|
|
}
|
|
}
|
|
return target;
|
|
}
|
|
|
|
/**
|
|
* Normalizes text according to the chosen form,
|
|
* replacing contents of the target buffer.
|
|
* @param source the original text, unnormalized
|
|
* @param target the resulting normalized text
|
|
*/
|
|
public boolean isFCD(String source) {
|
|
if (source.length() == 0) return true;
|
|
StringBuffer noReorder = new StringBuffer();
|
|
StringBuffer reorder = new StringBuffer();
|
|
|
|
internalDecompose(source, noReorder, false, false);
|
|
internalDecompose(source, reorder, true, false);
|
|
|
|
return reorder.toString().equals(noReorder.toString());
|
|
}
|
|
|
|
/**
|
|
* Normalizes text according to the chosen form
|
|
* @param source the original text, unnormalized
|
|
* @return target the resulting normalized text
|
|
*/
|
|
public String normalize(String source) {
|
|
return normalize(source, new StringBuffer()).toString();
|
|
}
|
|
|
|
/**
|
|
* Normalizes text according to the chosen form
|
|
* @param source the original text, unnormalized
|
|
* @return target the resulting normalized text
|
|
*/
|
|
public String normalize(int cp) {
|
|
return normalize(UTF16.valueOf(cp));
|
|
}
|
|
|
|
/**
|
|
private StringBuffer hasDecompositionBuffer = new StringBuffer();
|
|
|
|
public boolean hasDecomposition(int cp) {
|
|
hasDecompositionBuffer.setLength(0);
|
|
normalize(UTF16.valueOf(cp), hasDecompositionBuffer);
|
|
if (hasDecompositionBuffer.length() != 1) return true;
|
|
return cp != hasDecompositionBuffer.charAt(0);
|
|
}
|
|
*/
|
|
|
|
/**
|
|
* Does a quick check to see if the string is in the current form. Checks canonical order and
|
|
* isAllowed().
|
|
* @param source source text
|
|
* @return YES, NO, MAYBE
|
|
*/
|
|
/*
|
|
public static final int NO = 0, YES = 1, MAYBE = -1;
|
|
|
|
public int quickCheck(String source) {
|
|
short lastCanonicalClass = 0;
|
|
int result = YES;
|
|
for (int i = 0; i < source.length(); ++i) {
|
|
char ch = source.charAt(i);
|
|
short canonicalClass = data.getCanonicalClass(ch);
|
|
if (lastCanonicalClass > canonicalClass && canonicalClass != 0) {
|
|
return NO;
|
|
}
|
|
int check = isAllowed(ch);
|
|
if (check == NO) return NO;
|
|
if (check == MAYBE) result = MAYBE;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Find whether the given character is allowed in the current form.
|
|
* @return YES, NO, MAYBE
|
|
*/
|
|
/*
|
|
public int isAllowed(char ch) {
|
|
if (composition) {
|
|
if (compatibility) {
|
|
if (data.isCompatibilityExcluded(ch)) {
|
|
return NO;
|
|
}
|
|
} else {
|
|
if (data.isExcluded(ch)) {
|
|
return NO;
|
|
}
|
|
}
|
|
if (data.isTrailing(ch)) {
|
|
return MAYBE;
|
|
}
|
|
} else { // decomposition: both NFD and NFKD
|
|
if (data.normalizationDiffers(compatibility,ch)) return NO;
|
|
}
|
|
return YES;
|
|
}
|
|
|
|
/**
|
|
* Utility: Gets the combining class of a character from the
|
|
* Unicode Character Database. Only a byte is needed, but since they are signed in Java
|
|
* return an int to forstall problems.
|
|
* @param ch the source character
|
|
* @return value from 0 to 255
|
|
*/
|
|
|
|
public short getCanonicalClass(int ch) {
|
|
return data.getCanonicalClass(ch);
|
|
}
|
|
|
|
/**
|
|
* Utility: Checks whether there is a recursive decomposition of a character from the
|
|
* Unicode Character Database. It is compatibility or canonical according to the particular
|
|
* normalizer.
|
|
* @param ch the source character
|
|
*/
|
|
public boolean isNormalized(int ch) {
|
|
return !data.normalizationDiffers(ch, composition, compatibility);
|
|
}
|
|
|
|
/**
|
|
* Utility: Checks whether there is a recursive decomposition of a character from the
|
|
* Unicode Character Database. It is compatibility or canonical according to the particular
|
|
* normalizer.
|
|
* @param ch the source character
|
|
*/
|
|
public boolean isNormalized(String s) {
|
|
if (UTF16.countCodePoint(s) > 1) {
|
|
return !data.normalizationDiffers(UTF16.charAt(s,0), composition, compatibility);
|
|
}
|
|
return s.equals(normalize(s)); // TODO: OPTIMIZE LATER
|
|
}
|
|
|
|
/**
|
|
* Utility: Gets recursive decomposition of a character from the
|
|
* Unicode Character Database.
|
|
* @param compatibility If false selects the recursive
|
|
* canonical decomposition, otherwise selects
|
|
* the recursive compatibility AND canonical decomposition.
|
|
* @param ch the source character
|
|
* @param buffer buffer to be filled with the decomposition
|
|
*/
|
|
public void getRecursiveDecomposition(char ch, StringBuffer buffer) {
|
|
data.getRecursiveDecomposition(ch, buffer, compatibility);
|
|
}
|
|
|
|
/**
|
|
* Utility: Gets composition mapping.
|
|
* @return IntEnumeration with the pair -> value mapping, where the
|
|
* pair is firstChar << 16 | secondChar.
|
|
* Will need to be fixed for surrogates.
|
|
*/
|
|
|
|
public void getCompositionStatus(BitSet leading, BitSet trailing, BitSet resulting) {
|
|
Iterator it = data.compTable.keySet().iterator();
|
|
while (it.hasNext()) {
|
|
Long key = (Long)it.next();
|
|
Integer result = (Integer)data.compTable.get(key);
|
|
long keyLong = key.longValue();
|
|
if (leading != null) leading.set((int)(keyLong >>> 32));
|
|
if (trailing != null) trailing.set((int)keyLong);
|
|
if (resulting != null) resulting.set(result.intValue());
|
|
}
|
|
for (int i = UCD.LBase; i < UCD.TLimit; ++i) {
|
|
if (leading != null && UCD.isLeadingJamo(i)) leading.set(i); // set all initial Jamo (that form syllables)
|
|
if (trailing != null && UCD.isNonLeadJamo(i)) trailing.set(i); // set all final Jamo (that form syllables)
|
|
}
|
|
if (leading != null) {
|
|
for (int i = UCD.SBase; i < UCD.SLimit; ++i) {
|
|
if (UCD.isDoubleHangul(i)) leading.set(i); // set all two-Jamo syllables
|
|
}
|
|
}
|
|
}
|
|
|
|
public boolean isTrailing(int cp) {
|
|
return this.composition ? data.isTrailing(cp) : false;
|
|
}
|
|
|
|
public boolean isLeading(int cp) {
|
|
return this.composition ? data.isLeading(cp) : false;
|
|
}
|
|
|
|
public int getComposition(int first, int second) {
|
|
return data.getPairwiseComposition(first, second);
|
|
}
|
|
|
|
// ======================================
|
|
// PRIVATES
|
|
// ======================================
|
|
|
|
/**
|
|
* The current form.
|
|
*/
|
|
private byte form;
|
|
private boolean composition;
|
|
private boolean compatibility;
|
|
|
|
/**
|
|
* Decomposes text, either canonical or compatibility,
|
|
* replacing contents of the target buffer.
|
|
* @param form the normalization form. If NF_COMPATIBILITY_MASK
|
|
* bit is on in this byte, then selects the recursive
|
|
* compatibility decomposition, otherwise selects
|
|
* the recursive canonical decomposition.
|
|
* @param source the original text, unnormalized
|
|
* @param target the resulting normalized text
|
|
*/
|
|
private void internalDecompose(String source, StringBuffer target, boolean reorder, boolean compat) {
|
|
StringBuffer buffer = new StringBuffer();
|
|
int ch32;
|
|
for (int i = 0; i < source.length(); i += UTF16.getCharCount(ch32)) {
|
|
buffer.setLength(0);
|
|
ch32 = UTF16.charAt(source, i);
|
|
data.getRecursiveDecomposition(ch32, buffer, compat);
|
|
|
|
// add all of the characters in the decomposition.
|
|
// (may be just the original character, if there was
|
|
// no decomposition mapping)
|
|
|
|
int ch;
|
|
for (int j = 0; j < buffer.length(); j += UTF16.getCharCount(ch)) {
|
|
ch = UTF16.charAt(buffer, j);
|
|
int chClass = data.getCanonicalClass(ch);
|
|
int k = target.length(); // insertion point
|
|
if (chClass != 0 && reorder) {
|
|
|
|
// bubble-sort combining marks as necessary
|
|
|
|
int ch2;
|
|
for (; k > 0; k -= UTF16.getCharCount(ch2)) {
|
|
ch2 = UTF16.charAt(target, k-1);
|
|
if (data.getCanonicalClass(ch2) <= chClass) break;
|
|
}
|
|
}
|
|
target.insert(k, UTF16.valueOf(ch));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Composes text in place. Target must already
|
|
* have been decomposed.
|
|
* Uses UTF16, which is a utility class for supplementary character support in Java.
|
|
* @param target input: decomposed text.
|
|
* output: the resulting normalized text.
|
|
*/
|
|
private void internalCompose(StringBuffer target) {
|
|
int starterPos = 0;
|
|
int starterCh = UTF16.charAt(target,0);
|
|
int compPos = UTF16.getCharCount(starterCh); // length of last composition
|
|
int lastClass = data.getCanonicalClass(starterCh);
|
|
if (lastClass != 0) lastClass = 256; // fix for strings staring with a combining mark
|
|
int oldLen = target.length();
|
|
|
|
// Loop on the decomposed characters, combining where possible
|
|
|
|
int ch;
|
|
for (int decompPos = compPos; decompPos < target.length(); decompPos += UTF16.getCharCount(ch)) {
|
|
ch = UTF16.charAt(target, decompPos);
|
|
if (SHOW_PROGRESS) System.out.println(Utility.hex(target)
|
|
+ ", decompPos: " + decompPos
|
|
+ ", compPos: " + compPos
|
|
+ ", ch: " + Utility.hex(ch)
|
|
);
|
|
int chClass = data.getCanonicalClass(ch);
|
|
int composite = data.getPairwiseComposition(starterCh, ch);
|
|
if (composite != data.NOT_COMPOSITE
|
|
&& (lastClass < chClass || lastClass == 0)) {
|
|
UTF16.setCharAt(target, starterPos, composite);
|
|
// we know that we will only be replacing non-supplementaries by non-supplementaries
|
|
// so we don't have to adjust the decompPos
|
|
starterCh = composite;
|
|
} else {
|
|
if (chClass == 0) {
|
|
starterPos = compPos;
|
|
starterCh = ch;
|
|
}
|
|
lastClass = chClass;
|
|
UTF16.setCharAt(target, compPos, ch);
|
|
if (target.length() != oldLen) { // MAY HAVE TO ADJUST!
|
|
System.out.println("ADJUSTING: " + Utility.hex(target));
|
|
decompPos += target.length() - oldLen;
|
|
oldLen = target.length();
|
|
}
|
|
compPos += UTF16.getCharCount(ch);
|
|
}
|
|
}
|
|
target.setLength(compPos);
|
|
}
|
|
|
|
static class Stub {
|
|
private UCD ucd;
|
|
private HashMap compTable = new HashMap();
|
|
private BitSet isSecond = new BitSet();
|
|
private BitSet isFirst = new BitSet();
|
|
private BitSet canonicalRecompose = new BitSet();
|
|
private BitSet compatibilityRecompose = new BitSet();
|
|
static final int NOT_COMPOSITE = 0xFFFF;
|
|
|
|
Stub(String version) {
|
|
ucd = UCD.make(version);
|
|
for (int i = 0; i < 0x10FFFF; ++i) {
|
|
if (!ucd.isAssigned(i)) continue;
|
|
if (ucd.isPUA(i)) continue;
|
|
if (ucd.isNonLeadJamo(i)) isSecond.set(i);
|
|
if (ucd.isLeadingJamoComposition(i)) isFirst.set(i);
|
|
byte dt = ucd.getDecompositionType(i);
|
|
if (dt != CANONICAL) continue;
|
|
if (!ucd.getBinaryProperty(i, CompositionExclusion)) {
|
|
try {
|
|
String s = ucd.getDecompositionMapping(i);
|
|
int len = UTF16.countCodePoint(s);
|
|
if (len != 2) {
|
|
if (len > 2) {
|
|
if (ucd.getVersion().compareTo("3.0.0") >= 0) {
|
|
throw new IllegalArgumentException("BAD LENGTH: " + len + ucd.toString(i));
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
int a = UTF16.charAt(s, 0);
|
|
if (ucd.getCombiningClass(a) != 0) continue;
|
|
isFirst.set(a);
|
|
|
|
int b = UTF16.charAt(s, UTF16.getCharCount(a));
|
|
isSecond.set(b);
|
|
|
|
// have a recomposition, so set the bit
|
|
canonicalRecompose.set(i);
|
|
|
|
// set the compatibility recomposition bit
|
|
// ONLY if the component characters
|
|
// don't compatibility decompose
|
|
if (ucd.getDecompositionType(a) <= CANONICAL
|
|
&& ucd.getDecompositionType(b) <= CANONICAL) {
|
|
compatibilityRecompose.set(i);
|
|
}
|
|
|
|
long key = (((long)a)<<32) | b;
|
|
|
|
/*if (i == '\u1E0A' || key == 0x004400000307) {
|
|
System.out.println(Utility.hex(s));
|
|
System.out.println(Utility.hex(i));
|
|
System.out.println(Utility.hex(key));
|
|
}*/
|
|
compTable.put(new Long(key), new Integer(i));
|
|
} catch (Exception e) {
|
|
throw new ChainException("Error: {0}", new Object[]{ucd.toString(i)}, e);
|
|
}
|
|
}
|
|
}
|
|
// process compatibilityRecompose
|
|
// have to do this afterwards, since we don't know whether the pieces
|
|
// are allowable until we have processed all the characters
|
|
/*
|
|
Iterator it = compTable.keySet().iterator();
|
|
while (it.hasNext()) {
|
|
Long key = (Long)it.next();
|
|
int cp = compTable.get(key);
|
|
long keyLong = key.longValue();
|
|
int first = (int)(keyLong >>> 32);
|
|
int second = (int)keyLong;
|
|
if (ucd.
|
|
*/
|
|
}
|
|
|
|
String getUCDVersion() {
|
|
return ucd.getVersion();
|
|
}
|
|
|
|
/*
|
|
Problem: differs: true, call: false U+0385 GREEK DIALYTIKA TONOS
|
|
Problem: differs: true, call: false U+03D3 GREEK UPSILON WITH ACUTE AND HOOK SYMBOL
|
|
Problem: differs: true, call: false U+03D4 GREEK UPSILON WITH DIAERESIS AND HOOK SYMBOL
|
|
Problem: differs: true, call: false U+1E9B LATIN SMALL LETTER LONG S WITH DOT ABOVE
|
|
Problem: differs: true, call: false U+1FC1 GREEK DIALYTIKA AND PERISPOMENI
|
|
Problem: differs: true, call: false U+1FCD GREEK PSILI AND VARIA
|
|
Problem: differs: true, call: false U+1FCE GREEK PSILI AND OXIA
|
|
Problem: differs: true, call: false U+1FCF GREEK PSILI AND PERISPOMENI
|
|
Problem: differs: true, call: false U+1FDD GREEK DASIA AND VARIA
|
|
Problem: differs: true, call: false U+1FDE GREEK DASIA AND OXIA
|
|
Problem: differs: true, call: false U+1FDF GREEK DASIA AND PERISPOMENI
|
|
Problem: differs: true, call: false U+1FED GREEK DIALYTIKA AND VARIA
|
|
*/
|
|
|
|
short getCanonicalClass(int cp) {
|
|
return ucd.getCombiningClass(cp);
|
|
}
|
|
|
|
boolean isTrailing(int cp) {
|
|
return isSecond.get(cp);
|
|
}
|
|
|
|
boolean isLeading(int cp) {
|
|
return isFirst.get(cp);
|
|
}
|
|
|
|
boolean normalizationDiffers(int cp, boolean composition, boolean compat) {
|
|
byte dt = ucd.getDecompositionType(cp);
|
|
if (!composition) {
|
|
if (compat) return dt >= CANONICAL;
|
|
else return dt == CANONICAL;
|
|
} else {
|
|
// almost the same, except that we add back in the characters
|
|
// that RECOMPOSE
|
|
if (compat) return dt >= CANONICAL && !compatibilityRecompose.get(cp);
|
|
else return dt == CANONICAL && !canonicalRecompose.get(cp);
|
|
}
|
|
}
|
|
|
|
public void getRecursiveDecomposition(int cp, StringBuffer buffer, boolean compat) {
|
|
byte dt = ucd.getDecompositionType(cp);
|
|
// we know we decompose all CANONICAL, plus > CANONICAL if compat is TRUE.
|
|
if (dt == CANONICAL || dt > CANONICAL && compat) {
|
|
String s = ucd.getDecompositionMapping(cp);
|
|
if (s.equals(UTF16.valueOf(cp))) {
|
|
System.out.println("fix");
|
|
}
|
|
for (int i = 0; i < s.length(); i += UTF16.getCharCount(cp)) {
|
|
cp = UTF16.charAt(s, i);
|
|
getRecursiveDecomposition(cp, buffer, compat);
|
|
}
|
|
} else {
|
|
UTF16.append(buffer, cp);
|
|
}
|
|
}
|
|
|
|
int getPairwiseComposition(int starterCh, int ch) {
|
|
int hangulPoss = UCD.composeHangul(starterCh, ch);
|
|
if (hangulPoss != 0xFFFF) return hangulPoss;
|
|
Object obj = compTable.get(new Long((((long)starterCh)<<32) | ch));
|
|
if (obj == null) return 0xFFFF;
|
|
return ((Integer)obj).intValue();
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Contains normalization data from the Unicode Character Database.
|
|
* use false for the minimal set, true for the real set.
|
|
*/
|
|
private Stub data;
|
|
|
|
private static HashMap versionCache = new HashMap();
|
|
|
|
private static Stub getData (String version) {
|
|
if (version.length() == 0) version = UCD.latestVersion;
|
|
Stub result = (Stub)versionCache.get(version);
|
|
if (result == null) {
|
|
result = new Stub(version);
|
|
versionCache.put(version, result);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Just accessible for testing.
|
|
*/
|
|
/*
|
|
boolean isExcluded (char ch) {
|
|
return data.isExcluded(ch);
|
|
}
|
|
|
|
/**
|
|
* Just accessible for testing.
|
|
*/
|
|
/*
|
|
String getRawDecompositionMapping (char ch) {
|
|
return data.getRawDecompositionMapping(ch);
|
|
}
|
|
//*/
|
|
} |