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