search.h

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
*   Copyright (C) 2001-2011 IBM and others. All rights reserved.
**********************************************************************
*   Date        Name        Description
*  03/22/2000   helena      Creation.
**********************************************************************
*/

#ifndef SEARCH_H
#define SEARCH_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#if !UCONFIG_NO_COLLATION && !UCONFIG_NO_BREAK_ITERATION

#include "unicode/uobject.h"
#include "unicode/unistr.h"
#include "unicode/chariter.h"
#include "unicode/brkiter.h"
#include "unicode/usearch.h"

struct USearch;
typedef struct USearch USearch;

U_NAMESPACE_BEGIN

class U_I18N_API SearchIterator : public UObject {

public:

    // public constructors and destructors -------------------------------

    SearchIterator(const SearchIterator &other);

    virtual ~SearchIterator();

    // public get and set methods ----------------------------------------

    virtual void setOffset(int32_t position, UErrorCode &status) = 0;

    virtual int32_t getOffset(void) const = 0;

    void setAttribute(USearchAttribute       attribute,
                      USearchAttributeValue  value,
                      UErrorCode            &status);

    USearchAttributeValue getAttribute(USearchAttribute  attribute) const;
    
    int32_t getMatchedStart(void) const;

    int32_t getMatchedLength(void) const;
    
    void getMatchedText(UnicodeString &result) const;
    
    void setBreakIterator(BreakIterator *breakiter, UErrorCode &status);
    
    const BreakIterator * getBreakIterator(void) const;

    virtual void setText(const UnicodeString &text, UErrorCode &status);    

    virtual void setText(CharacterIterator &text, UErrorCode &status);
    
    const UnicodeString & getText(void) const;

    // operator overloading ----------------------------------------------

    virtual bool operator==(const SearchIterator &that) const;

    bool operator!=(const SearchIterator &that) const;

    // public methods ----------------------------------------------------

    virtual SearchIterator* safeClone(void) const = 0;

    int32_t first(UErrorCode &status);

    int32_t following(int32_t position, UErrorCode &status);
    
    int32_t last(UErrorCode &status);

    int32_t preceding(int32_t position, UErrorCode &status);

     int32_t next(UErrorCode &status);

    int32_t previous(UErrorCode &status);

    virtual void reset();

protected:
    // protected data members ---------------------------------------------

    USearch *m_search_;

    BreakIterator *m_breakiterator_;
    
    UnicodeString  m_text_;

    // protected constructors and destructors -----------------------------

    SearchIterator();

    SearchIterator(const UnicodeString &text, 
                         BreakIterator *breakiter = nullptr);

    SearchIterator(CharacterIterator &text, BreakIterator *breakiter = nullptr);

    // protected methods --------------------------------------------------

    SearchIterator & operator=(const SearchIterator &that);

    virtual int32_t handleNext(int32_t position, UErrorCode &status) 
                                                                         = 0;

     virtual int32_t handlePrev(int32_t position, UErrorCode &status) 
                                                                         = 0;

    virtual void setMatchLength(int32_t length);

    virtual void setMatchStart(int32_t position);

    void setMatchNotFound();
};

inline bool SearchIterator::operator!=(const SearchIterator &that) const
{
   return !operator==(that); 
}
U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_COLLATION */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif