Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame^] | 1 | // © 2016 and later: Unicode, Inc. and others. |
| 2 | // License & terms of use: http://www.unicode.org/copyright.html |
| 3 | /* |
| 4 | *********************************************************************** |
| 5 | * Copyright (c) 2002-2007, International Business Machines Corporation |
| 6 | * and others. All Rights Reserved. |
| 7 | *********************************************************************** |
| 8 | * Date Name Description |
| 9 | * 06/06/2002 aliu Creation. |
| 10 | *********************************************************************** |
| 11 | */ |
| 12 | #ifndef _ANYTRANS_H_ |
| 13 | #define _ANYTRANS_H_ |
| 14 | |
| 15 | #include "unicode/utypes.h" |
| 16 | |
| 17 | #if !UCONFIG_NO_TRANSLITERATION |
| 18 | |
| 19 | #include "unicode/translit.h" |
| 20 | #include "unicode/uscript.h" |
| 21 | #include "uhash.h" |
| 22 | |
| 23 | U_NAMESPACE_BEGIN |
| 24 | |
| 25 | /** |
| 26 | * A transliterator named Any-T or Any-T/V, where T is the target |
| 27 | * script and V is the optional variant, that uses multiple |
| 28 | * transliterators, all going to T or T/V, all with script sources. |
| 29 | * The target must be a script. It partitions text into runs of the |
| 30 | * same script, and then based on the script of each run, |
| 31 | * transliterates from that script to the given target or |
| 32 | * target/variant. Adjacent COMMON or INHERITED script characters are |
| 33 | * included in each run. |
| 34 | * |
| 35 | * @author Alan Liu |
| 36 | */ |
| 37 | class AnyTransliterator : public Transliterator { |
| 38 | |
| 39 | /** |
| 40 | * Cache mapping UScriptCode values to Transliterator*. |
| 41 | */ |
| 42 | UHashtable* cache; |
| 43 | |
| 44 | /** |
| 45 | * The target or target/variant string. |
| 46 | */ |
| 47 | UnicodeString target; |
| 48 | |
| 49 | /** |
| 50 | * The target script code. Never USCRIPT_INVALID_CODE. |
| 51 | */ |
| 52 | UScriptCode targetScript; |
| 53 | |
| 54 | public: |
| 55 | |
| 56 | /** |
| 57 | * Destructor. |
| 58 | */ |
| 59 | virtual ~AnyTransliterator(); |
| 60 | |
| 61 | /** |
| 62 | * Copy constructor. |
| 63 | */ |
| 64 | AnyTransliterator(const AnyTransliterator&); |
| 65 | |
| 66 | /** |
| 67 | * Transliterator API. |
| 68 | */ |
| 69 | virtual AnyTransliterator* clone() const; |
| 70 | |
| 71 | /** |
| 72 | * Implements {@link Transliterator#handleTransliterate}. |
| 73 | */ |
| 74 | virtual void handleTransliterate(Replaceable& text, UTransPosition& index, |
| 75 | UBool incremental) const; |
| 76 | |
| 77 | /** |
| 78 | * ICU "poor man's RTTI", returns a UClassID for the actual class. |
| 79 | */ |
| 80 | virtual UClassID getDynamicClassID() const; |
| 81 | |
| 82 | /** |
| 83 | * ICU "poor man's RTTI", returns a UClassID for this class. |
| 84 | */ |
| 85 | U_I18N_API static UClassID U_EXPORT2 getStaticClassID(); |
| 86 | |
| 87 | private: |
| 88 | |
| 89 | /** |
| 90 | * Private constructor |
| 91 | * @param id the ID of the form S-T or S-T/V, where T is theTarget |
| 92 | * and V is theVariant. Must not be empty. |
| 93 | * @param theTarget the target name. Must not be empty, and must |
| 94 | * name a script corresponding to theTargetScript. |
| 95 | * @param theVariant the variant name, or the empty string if |
| 96 | * there is no variant |
| 97 | * @param theTargetScript the script code corresponding to |
| 98 | * theTarget. |
| 99 | * @param ec error code, fails if the internal hashtable cannot be |
| 100 | * allocated |
| 101 | */ |
| 102 | AnyTransliterator(const UnicodeString& id, |
| 103 | const UnicodeString& theTarget, |
| 104 | const UnicodeString& theVariant, |
| 105 | UScriptCode theTargetScript, |
| 106 | UErrorCode& ec); |
| 107 | |
| 108 | /** |
| 109 | * Returns a transliterator from the given source to our target or |
| 110 | * target/variant. Returns NULL if the source is the same as our |
| 111 | * target script, or if the source is USCRIPT_INVALID_CODE. |
| 112 | * Caches the result and returns the same transliterator the next |
| 113 | * time. The caller does NOT own the result and must not delete |
| 114 | * it. |
| 115 | */ |
| 116 | Transliterator* getTransliterator(UScriptCode source) const; |
| 117 | |
| 118 | /** |
| 119 | * Registers standard transliterators with the system. Called by |
| 120 | * Transliterator during initialization. |
| 121 | */ |
| 122 | static void registerIDs(); |
| 123 | |
| 124 | friend class Transliterator; // for registerIDs() |
| 125 | }; |
| 126 | |
| 127 | U_NAMESPACE_END |
| 128 | |
| 129 | #endif /* #if !UCONFIG_NO_TRANSLITERATION */ |
| 130 | |
| 131 | #endif |