100 lines
3.3 KiB
C++
100 lines
3.3 KiB
C++
// Copyright (C) 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
**********************************************************************
|
|
* Copyright (c) 2002-2005, International Business Machines Corporation
|
|
* and others. All Rights Reserved.
|
|
**********************************************************************
|
|
* Date Name Description
|
|
* 01/14/2002 aliu Creation.
|
|
**********************************************************************
|
|
*/
|
|
#ifndef UNIREPL_H
|
|
#define UNIREPL_H
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
/**
|
|
* \file
|
|
* \brief C++ API: UnicodeReplacer
|
|
*/
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
class Replaceable;
|
|
class UnicodeString;
|
|
class UnicodeSet;
|
|
|
|
/**
|
|
* <code>UnicodeReplacer</code> defines a protocol for objects that
|
|
* replace a range of characters in a Replaceable string with output
|
|
* text. The replacement is done via the Replaceable API so as to
|
|
* preserve out-of-band data.
|
|
*
|
|
* <p>This is a mixin class.
|
|
* @author Alan Liu
|
|
* @stable ICU 2.4
|
|
*/
|
|
class U_I18N_API UnicodeReplacer /* not : public UObject because this is an interface/mixin class */ {
|
|
|
|
public:
|
|
|
|
/**
|
|
* Destructor.
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual ~UnicodeReplacer();
|
|
|
|
/**
|
|
* Replace characters in 'text' from 'start' to 'limit' with the
|
|
* output text of this object. Update the 'cursor' parameter to
|
|
* give the cursor position and return the length of the
|
|
* replacement text.
|
|
*
|
|
* @param text the text to be matched
|
|
* @param start inclusive start index of text to be replaced
|
|
* @param limit exclusive end index of text to be replaced;
|
|
* must be greater than or equal to start
|
|
* @param cursor output parameter for the cursor position.
|
|
* Not all replacer objects will update this, but in a complete
|
|
* tree of replacer objects, representing the entire output side
|
|
* of a transliteration rule, at least one must update it.
|
|
* @return the number of 16-bit code units in the text replacing
|
|
* the characters at offsets start..(limit-1) in text
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual int32_t replace(Replaceable& text,
|
|
int32_t start,
|
|
int32_t limit,
|
|
int32_t& cursor) = 0;
|
|
|
|
/**
|
|
* Returns a string representation of this replacer. If the
|
|
* result of calling this function is passed to the appropriate
|
|
* parser, typically TransliteratorParser, it will produce another
|
|
* replacer that is equal to this one.
|
|
* @param result the string to receive the pattern. Previous
|
|
* contents will be deleted.
|
|
* @param escapeUnprintable if TRUE then convert unprintable
|
|
* character to their hex escape representations, \\uxxxx or
|
|
* \\Uxxxxxxxx. Unprintable characters are defined by
|
|
* Utility.isUnprintable().
|
|
* @return a reference to 'result'.
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual UnicodeString& toReplacerPattern(UnicodeString& result,
|
|
UBool escapeUnprintable) const = 0;
|
|
|
|
/**
|
|
* Union the set of all characters that may output by this object
|
|
* into the given set.
|
|
* @param toUnionTo the set into which to union the output characters
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual void addReplacementSetTo(UnicodeSet& toUnionTo) const = 0;
|
|
};
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif
|