149 lines
4.7 KiB
C++
149 lines
4.7 KiB
C++
/*
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*******************************************************************************
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*
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* Copyright (C) 1998-1999, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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*
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* File schriter.h
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*
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* Modification History:
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*
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* Date Name Description
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* 05/05/99 stephen Cleaned up.
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*******************************************************************************
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*/
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#ifndef SCHRITER_H
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#define SCHRITER_H
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#include "unicode/utypes.h"
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#include "unicode/chariter.h"
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#include "unicode/uchriter.h"
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/**
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* A concrete subclass of CharacterIterator that iterates over the
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* characters (code units or code points) in a UnicodeString.
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* It's possible not only to create an
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* iterator that iterates over an entire UnicodeString, but also to
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* create one that iterates over only a subrange of a UnicodeString
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* (iterators over different subranges of the same UnicodeString don't
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* compare equal).
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*/
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class U_COMMON_API StringCharacterIterator : public UCharCharacterIterator {
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public:
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/**
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* Create an iterator over the UnicodeString referred to by "text".
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* The UnicodeString object is copied.
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* The iteration range is the whole string, and the starting position is 0.
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* @stable
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*/
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StringCharacterIterator(const UnicodeString& text);
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/**
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* Create an iterator over the UnicodeString referred to by "text".
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* The iteration range is the whole string, and the starting
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* position is specified by "pos". If "pos" is outside the valid
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* iteration range, the behavior of this object is undefined.
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* @stable
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*/
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StringCharacterIterator(const UnicodeString& text,
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UTextOffset pos);
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/**
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* Create an iterator over the UnicodeString referred to by "text".
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* The UnicodeString object is copied.
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* The iteration range begins with the code unit specified by
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* "begin" and ends with the code unit BEFORE the code unit specfied
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* by "end". The starting position is specified by "pos". If
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* "begin" and "end" don't form a valid range on "text" (i.e., begin
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* >= end or either is negative or greater than text.size()), or
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* "pos" is outside the range defined by "begin" and "end", the
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* behavior of this iterator is undefined.
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* @stable
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*/
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StringCharacterIterator(const UnicodeString& text,
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UTextOffset begin,
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UTextOffset end,
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UTextOffset pos);
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/**
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* Copy constructor. The new iterator iterates over the same range
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* of the same string as "that", and its initial position is the
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* same as "that"'s current position.
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* The UnicodeString object in "that" is copied.
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* @stable
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*/
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StringCharacterIterator(const StringCharacterIterator& that);
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/**
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* Destructor.
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* @stable
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*/
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virtual ~StringCharacterIterator();
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/**
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* Assignment operator. *this is altered to iterate over the same
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* range of the same string as "that", and refers to the same
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* character within that string as "that" does.
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* @stable
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*/
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StringCharacterIterator&
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operator=(const StringCharacterIterator& that);
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/**
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* Returns true if the iterators iterate over the same range of the
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* same string and are pointing at the same character.
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* @stable
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*/
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virtual bool_t operator==(const CharacterIterator& that) const;
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/**
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* Returns a new StringCharacterIterator referring to the same
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* character in the same range of the same string as this one. The
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* caller must delete the new iterator.
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* @draft
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*/
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virtual CharacterIterator* clone(void) const;
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/**
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* Sets the iterator to iterate over the provided string.
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* @draft
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*/
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void setText(const UnicodeString& newText);
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/**
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* Copies the UnicodeString under iteration into the UnicodeString
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* referred to by "result". Even if this iterator iterates across
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* only a part of this string, the whole string is copied. @param
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* result Receives a copy of the text under iteration.
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* @stable
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*/
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virtual void getText(UnicodeString& result);
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/**
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* Return a class ID for this object (not really public)
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* @stable
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*/
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virtual UClassID getDynamicClassID(void) const
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{ return getStaticClassID(); }
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/**
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* Return a class ID for this class (not really public)
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* @stable
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*/
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static UClassID getStaticClassID(void)
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{ return (UClassID)(&fgClassID); }
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protected:
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StringCharacterIterator();
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void setText(const UChar* newText, int32_t newTextLength);
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UnicodeString text;
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static UClassID fgClassID;
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};
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#endif
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