// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2009-2015, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
#ifndef FPHDLIMP_H
#define FPHDLIMP_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/fieldpos.h"
#include "unicode/fpositer.h"
#include "unicode/formattedvalue.h"
U_NAMESPACE_BEGIN
// utility FieldPositionHandler
// base class, null implementation
class U_I18N_API FieldPositionHandler:
public UMemory {
protected:
int32_t fShift = 0;
public:
virtual ~FieldPositionHandler();
virtual void addAttribute(int32_t id, int32_t start, int32_t limit) = 0;
virtual void shiftLast(int32_t delta) = 0;
virtual UBool isRecording()
const = 0;
void setShift(int32_t delta);
};
// utility subclass FieldPositionOnlyHandler
class FieldPositionOnlyHandler :
public FieldPositionHandler {
FieldPosition& pos;
UBool acceptFirstOnly =
false;
UBool seenFirst =
false;
public:
FieldPositionOnlyHandler(FieldPosition& pos);
virtual ~FieldPositionOnlyHandler();
void addAttribute(int32_t id, int32_t start, int32_t limit) override;
void shiftLast(int32_t delta) override;
UBool isRecording()
const override;
/**
* Enable this option to lock in the FieldPosition value after seeing the
* first occurrence of the field. The default behavior is to take the last
* occurrence.
*/
void setAcceptFirstOnly(UBool acceptFirstOnly);
};
// utility subclass FieldPositionIteratorHandler
// exported as U_I18N_API for tests
class U_I18N_API FieldPositionIteratorHandler :
public FieldPositionHandler {
FieldPositionIterator* iter;
// can be nullptr
UVector32* vec;
UErrorCode status;
UFieldCategory fCategory;
// Note, we keep a reference to status, so if status is on the stack, we have
// to be destroyed before status goes out of scope. Easiest thing is to
// allocate us on the stack in the same (or narrower) scope as status has.
// This attempts to encourage that by blocking heap allocation.
static void* U_EXPORT2
operator new(size_t) noexcept =
delete;
static void* U_EXPORT2
operator new[](size_t) noexcept =
delete;
#if U_HAVE_PLACEMENT_NEW
static void* U_EXPORT2
operator new(size_t,
void*) noexcept =
delete;
#endif
public:
FieldPositionIteratorHandler(FieldPositionIterator* posIter, UErrorCode& status
);
/** If using this constructor, you must call getError() when done formatting! */
FieldPositionIteratorHandler(UVector32* vec, UErrorCode& status);
~FieldPositionIteratorHandler();
void addAttribute(int32_t id, int32_t start, int32_t limit) override;
void shiftLast(int32_t delta) override;
UBool isRecording() const override;
/** Copies a failed error code into _status. */
inline void getError(UErrorCode& _status) {
if (U_SUCCESS(_status) && U_FAILURE(status)) {
_status = status;
}
}
inline void setCategory(UFieldCategory category) {
fCategory = category;
}
};
U_NAMESPACE_END
#endif /* !UCONFIG_NO_FORMATTING */
#endif /* FPHDLIMP_H */
