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rep.h

00001 /*
00002 **********************************************************************
00003 * Copyright (C) 1999, International Business Machines Corporation and
00004 * others. All Rights Reserved.
00005 **********************************************************************
00006 *   Date        Name        Description
00007 *   11/17/99    aliu        Creation.  Ported from java.  Modified to
00008 *                           match current UnicodeString API.  Forced
00009 *                           to use name "handleReplaceBetween" because
00010 *                           of existing methods in UnicodeString.
00011 **********************************************************************
00012 */
00013 
00014 #ifndef REP_H
00015 #define REP_H
00016 
00017 #include "unicode/utypes.h"
00018 
00019 class UnicodeString;
00020 
00044 class U_COMMON_API Replaceable {
00045 
00046 public:
00047 
00052     virtual ~Replaceable();
00053 
00059     virtual int32_t length() const = 0;
00060 
00068     virtual UChar charAt(UTextOffset offset) const = 0;
00069 
00079     virtual UChar32 char32At(UTextOffset offset) const = 0;
00080 
00099     /* THIS API IS NOT NEEDED, BUT KEPT HERE AS A COMMENT IN
00100        CASE OF FUTURE NEED.  CURRENTLY INDIVIDUAL CHARACTER
00101        ACCESS SUFFICES. */
00102     /* virtual void extractBetween(UTextOffset srcStart,
00103                                 UTextOffset srcLimit,
00104                                 UChar* dst,
00105                                 UTextOffset dstStart = 0) const = 0; */
00106 
00120     virtual void handleReplaceBetween(UTextOffset start,
00121                                       UTextOffset limit,
00122                                       const UnicodeString& text) = 0;
00123     // Note: All other methods in this class take the names of
00124     // existing UnicodeString methods.  This method is the exception.
00125     // It is named differently because all replace methods of
00126     // UnicodeString return a UnicodeString&.  The 'between' is
00127     // required in order to conform to the UnicodeString naming
00128     // convention; API taking start/length are named <operation>, and
00129     // those taking start/limit are named <operationBetween>.  The
00130     // 'handle' is added because 'replaceBetween' and
00131     // 'doReplaceBetween' are already taken.
00132 
00153     virtual void copy(int32_t start, int32_t limit, int32_t dest) = 0;
00154 
00155 protected:
00156 
00160     Replaceable();
00161 };
00162 
00163 inline Replaceable::Replaceable() {}
00164 
00165 inline Replaceable::~Replaceable() {}
00166 
00167 #endif

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