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// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
#ifndef __FORMVAL_IMPL_H__
#define __FORMVAL_IMPL_H__
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
// This file contains compliant implementations of FormattedValue which can be
// leveraged by ICU formatters.
//
// Each implementation is defined in its own cpp file in order to split
// dependencies more modularly.
#include "unicode/formattedvalue.h"
#include "capi_helper.h"
#include "fphdlimp.h"
#include "util.h"
#include "uvectr32.h"
#include "formatted_string_builder.h"
/**
* Represents the type of constraint for ConstrainedFieldPosition.
*
* Constraints are used to control the behavior of iteration in FormattedValue.
*
* @internal
*/
typedef enum UCFPosConstraintType {
/**
* Represents the lack of a constraint.
*
* This is the value of fConstraint if no "constrain" methods were called.
*
* @internal
*/
UCFPOS_CONSTRAINT_NONE = 0,
/**
* Represents that the field category is constrained.
*
* This is the value of fConstraint if constraintCategory was called.
*
* FormattedValue implementations should not change the field category
* while this constraint is active.
*
* @internal
*/
UCFPOS_CONSTRAINT_CATEGORY,
/**
* Represents that the field and field category are constrained.
*
* This is the value of fConstraint if constraintField was called.
*
* FormattedValue implementations should not change the field or field category
* while this constraint is active.
*
* @internal
*/
UCFPOS_CONSTRAINT_FIELD
} UCFPosConstraintType;
U_NAMESPACE_BEGIN
/**
* Implementation of FormattedValue using FieldPositionHandler to accept fields.
*/
class FormattedValueFieldPositionIteratorImpl : public UMemory, public FormattedValue {
public:
/** @param initialFieldCapacity Initially allocate space for this many fields. */
FormattedValueFieldPositionIteratorImpl(int32_t initialFieldCapacity, UErrorCode& status);
virtual ~FormattedValueFieldPositionIteratorImpl();
// Implementation of FormattedValue (const):
UnicodeString toString(UErrorCode& status) const U_OVERRIDE;
UnicodeString toTempString(UErrorCode& status) const U_OVERRIDE;
Appendable& appendTo(Appendable& appendable, UErrorCode& status) const U_OVERRIDE;
UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const U_OVERRIDE;
// Additional methods used during construction phase only (non-const):
FieldPositionIteratorHandler getHandler(UErrorCode& status);
void appendString(UnicodeString string, UErrorCode& status);
/**
* Computes the spans for duplicated values.
* For example, if the string has fields:
*
* ...aa..[b.cc]..d.[bb.e.c]..a..
*
* then the spans will be the bracketed regions.
*
* Assumes that the currently known fields are sorted
* and all in the same category.
*/
void addOverlapSpans(UFieldCategory spanCategory, int8_t firstIndex, UErrorCode& status);
/**
* Sorts the fields: start index first, length second.
*/
void sort();
private:
UnicodeString fString;
UVector32 fFields;
};
/**
* Implementation of FormattedValue based on FormattedStringBuilder.
*
* The implementation currently revolves around numbers and number fields.
* However, it can be generalized in the future when there is a need.
*
* @author sffc (Shane Carr)
*/
// Exported as U_I18N_API for tests
class U_I18N_API FormattedValueStringBuilderImpl : public UMemory, public FormattedValue {
public:
FormattedValueStringBuilderImpl(FormattedStringBuilder::Field numericField);
virtual ~FormattedValueStringBuilderImpl();
// Implementation of FormattedValue (const):
UnicodeString toString(UErrorCode& status) const U_OVERRIDE;
UnicodeString toTempString(UErrorCode& status) const U_OVERRIDE;
Appendable& appendTo(Appendable& appendable, UErrorCode& status) const U_OVERRIDE;
UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const U_OVERRIDE;
// Additional helper functions:
UBool nextFieldPosition(FieldPosition& fp, UErrorCode& status) const;
void getAllFieldPositions(FieldPositionIteratorHandler& fpih, UErrorCode& status) const;
inline FormattedStringBuilder& getStringRef() {
return fString;
}
inline const FormattedStringBuilder& getStringRef() const {
return fString;
}
private:
FormattedStringBuilder fString;
FormattedStringBuilder::Field fNumericField;
bool nextPositionImpl(ConstrainedFieldPosition& cfpos, FormattedStringBuilder::Field numericField, UErrorCode& status) const;
static bool isIntOrGroup(FormattedStringBuilder::Field field);
int32_t trimBack(int32_t limit) const;
int32_t trimFront(int32_t start) const;
};
// C API Helpers for FormattedValue
// Magic number as ASCII == "UFV"
struct UFormattedValueImpl;
typedef IcuCApiHelper<UFormattedValue, UFormattedValueImpl, 0x55465600> UFormattedValueApiHelper;
struct UFormattedValueImpl : public UMemory, public UFormattedValueApiHelper {
// This pointer should be set by the child class.
FormattedValue* fFormattedValue = nullptr;
};
/** Boilerplate to check for valid status before dereferencing the fData pointer. */
#define UPRV_FORMATTED_VALUE_METHOD_GUARD(returnExpression) \
if (U_FAILURE(status)) { \
return returnExpression; \
} \
if (fData == nullptr) { \
status = fErrorCode; \
return returnExpression; \
} \
/** Implementation of the methods from U_FORMATTED_VALUE_SUBCLASS_AUTO. */
#define UPRV_FORMATTED_VALUE_SUBCLASS_AUTO_IMPL(Name) \
Name::Name(Name&& src) U_NOEXCEPT \
: fData(src.fData), fErrorCode(src.fErrorCode) { \
src.fData = nullptr; \
src.fErrorCode = U_INVALID_STATE_ERROR; \
} \
Name::~Name() { \
delete fData; \
fData = nullptr; \
} \
Name& Name::operator=(Name&& src) U_NOEXCEPT { \
delete fData; \
fData = src.fData; \
src.fData = nullptr; \
fErrorCode = src.fErrorCode; \
src.fErrorCode = U_INVALID_STATE_ERROR; \
return *this; \
} \
UnicodeString Name::toString(UErrorCode& status) const { \
UPRV_FORMATTED_VALUE_METHOD_GUARD(ICU_Utility::makeBogusString()) \
return fData->toString(status); \
} \
UnicodeString Name::toTempString(UErrorCode& status) const { \
UPRV_FORMATTED_VALUE_METHOD_GUARD(ICU_Utility::makeBogusString()) \
return fData->toTempString(status); \
} \
Appendable& Name::appendTo(Appendable& appendable, UErrorCode& status) const { \
UPRV_FORMATTED_VALUE_METHOD_GUARD(appendable) \
return fData->appendTo(appendable, status); \
} \
UBool Name::nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const { \
UPRV_FORMATTED_VALUE_METHOD_GUARD(FALSE) \
return fData->nextPosition(cfpos, status); \
}
/** Like UPRV_FORMATTED_VALUE_CAPI_AUTO_IMPL but without impl type declarations. */
#define UPRV_FORMATTED_VALUE_CAPI_NO_IMPLTYPE_AUTO_IMPL(CType, ImplType, HelperType, Prefix) \
U_CAPI CType* U_EXPORT2 \
Prefix ## _openResult (UErrorCode* ec) { \
if (U_FAILURE(*ec)) { \
return nullptr; \
} \
ImplType* impl = new ImplType(); \
if (impl == nullptr) { \
*ec = U_MEMORY_ALLOCATION_ERROR; \
return nullptr; \
} \
return static_cast<HelperType*>(impl)->exportForC(); \
} \
U_DRAFT const UFormattedValue* U_EXPORT2 \
Prefix ## _resultAsValue (const CType* uresult, UErrorCode* ec) { \
const ImplType* result = HelperType::validate(uresult, *ec); \
if (U_FAILURE(*ec)) { return nullptr; } \
return static_cast<const UFormattedValueApiHelper*>(result)->exportConstForC(); \
} \
U_CAPI void U_EXPORT2 \
Prefix ## _closeResult (CType* uresult) { \
UErrorCode localStatus = U_ZERO_ERROR; \
const ImplType* impl = HelperType::validate(uresult, localStatus); \
delete impl; \
}
/**
* Implementation of the standard methods for a UFormattedValue "subclass" C API.
* @param CPPType The public C++ type, like FormattedList
* @param CType The public C type, like UFormattedList
* @param ImplType A name to use for the implementation class
* @param HelperType A name to use for the "mixin" typedef for C API conversion
* @param Prefix The C API prefix, like ulistfmt
* @param MagicNumber A unique 32-bit number to use to identify this type
*/
#define UPRV_FORMATTED_VALUE_CAPI_AUTO_IMPL(CPPType, CType, ImplType, HelperType, Prefix, MagicNumber) \
U_NAMESPACE_BEGIN \
class ImplType; \
typedef IcuCApiHelper<CType, ImplType, MagicNumber> HelperType; \
class ImplType : public UFormattedValueImpl, public HelperType { \
public: \
ImplType(); \
~ImplType(); \
CPPType fImpl; \
}; \
ImplType::ImplType() { \
fFormattedValue = &fImpl; \
} \
ImplType::~ImplType() {} \
U_NAMESPACE_END \
UPRV_FORMATTED_VALUE_CAPI_NO_IMPLTYPE_AUTO_IMPL(CType, ImplType, HelperType, Prefix)
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif // __FORMVAL_IMPL_H__
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