1 /* GENERATED SOURCE. DO NOT MODIFY. */ 2 // © 2016 and later: Unicode, Inc. and others. 3 // License & terms of use: http://www.unicode.org/copyright.html#License 4 /* 5 ******************************************************************************* 6 * Copyright (C) 2009-2011, Google, International Business Machines Corporation 7 * and others. All Rights Reserved. 8 ******************************************************************************* 9 */ 10 package ohos.global.icu.text; 11 12 import ohos.global.icu.impl.UCaseProps; 13 import ohos.global.icu.lang.UCharacter; 14 15 /** 16 * A transliterator that performs locale-sensitive toLower() 17 * case mapping. 18 */ 19 class CaseFoldTransliterator extends Transliterator{ 20 21 /** 22 * Package accessible ID. 23 */ 24 static final String _ID = "Any-CaseFold"; 25 26 // TODO: Add variants for tr, az, lt, default = default locale 27 28 /** 29 * System registration hook. 30 */ register()31 static void register() { 32 Transliterator.registerFactory(_ID, new Transliterator.Factory() { 33 @Override 34 public Transliterator getInstance(String ID) { 35 return new CaseFoldTransliterator(); 36 } 37 }); 38 39 Transliterator.registerSpecialInverse("CaseFold", "Upper", false); 40 } 41 42 private final UCaseProps csp; 43 private ReplaceableContextIterator iter; 44 private StringBuilder result; 45 46 /** 47 * Constructs a transliterator. 48 */ 49 CaseFoldTransliterator()50 public CaseFoldTransliterator() { 51 super(_ID, null); 52 csp=UCaseProps.INSTANCE; 53 iter=new ReplaceableContextIterator(); 54 result = new StringBuilder(); 55 } 56 57 /** 58 * Implements {@link Transliterator#handleTransliterate}. 59 */ 60 @Override handleTransliterate(Replaceable text, Position offsets, boolean isIncremental)61 protected synchronized void handleTransliterate(Replaceable text, 62 Position offsets, boolean isIncremental) { 63 if(csp==null) { 64 return; 65 } 66 67 if(offsets.start >= offsets.limit) { 68 return; 69 } 70 71 iter.setText(text); 72 result.setLength(0); 73 int c, delta; 74 75 // Walk through original string 76 // If there is a case change, modify corresponding position in replaceable 77 78 iter.setIndex(offsets.start); 79 iter.setLimit(offsets.limit); 80 iter.setContextLimits(offsets.contextStart, offsets.contextLimit); 81 while((c=iter.nextCaseMapCP())>=0) { 82 c=csp.toFullFolding(c, result, 0); // toFullFolding(int c, StringBuffer out, int options) 83 84 if(iter.didReachLimit() && isIncremental) { 85 // the case mapping function tried to look beyond the context limit 86 // wait for more input 87 offsets.start=iter.getCaseMapCPStart(); 88 return; 89 } 90 91 /* decode the result */ 92 if(c<0) { 93 /* c mapped to itself, no change */ 94 continue; 95 } else if(c<=UCaseProps.MAX_STRING_LENGTH) { 96 /* replace by the mapping string */ 97 delta=iter.replace(result.toString()); 98 result.setLength(0); 99 } else { 100 /* replace by single-code point mapping */ 101 delta=iter.replace(UTF16.valueOf(c)); 102 } 103 104 if(delta!=0) { 105 offsets.limit += delta; 106 offsets.contextLimit += delta; 107 } 108 } 109 offsets.start = offsets.limit; 110 } 111 112 static SourceTargetUtility sourceTargetUtility = null; 113 114 /* (non-Javadoc) 115 * @see ohos.global.icu.text.Transliterator#addSourceTargetSet(ohos.global.icu.text.UnicodeSet, ohos.global.icu.text.UnicodeSet, ohos.global.icu.text.UnicodeSet) 116 */ 117 @Override addSourceTargetSet(UnicodeSet inputFilter, UnicodeSet sourceSet, UnicodeSet targetSet)118 public void addSourceTargetSet(UnicodeSet inputFilter, UnicodeSet sourceSet, UnicodeSet targetSet) { 119 synchronized (UppercaseTransliterator.class) { 120 if (sourceTargetUtility == null) { 121 sourceTargetUtility = new SourceTargetUtility(new Transform<String,String>() { 122 @Override 123 public String transform(String source) { 124 return UCharacter.foldCase(source, true); 125 } 126 }); 127 } 128 } 129 sourceTargetUtility.addSourceTargetSet(this, inputFilter, sourceSet, targetSet); 130 } 131 } 132