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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /intl/icu/source/i18n/formattedval_impl.h
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
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Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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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.
+ *
+ * TODO(ICU-20897): This class is unused. If it is not needed when fixing ICU-20897,
+ * it should be deleted.
+ */
+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 override;
+ UnicodeString toTempString(UErrorCode& status) const override;
+ Appendable& appendTo(Appendable& appendable, UErrorCode& status) const override;
+ UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const 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;
+};
+
+
+// Internal struct that must be exported for MSVC
+struct U_I18N_API SpanInfo {
+ UFieldCategory category;
+ int32_t spanValue;
+ int32_t start;
+ int32_t length;
+};
+
+// Export an explicit template instantiation of the MaybeStackArray that
+// is used as a data member of CEBuffer.
+//
+// When building DLLs for Windows this is required even though
+// no direct access to the MaybeStackArray leaks out of the i18n library.
+//
+// See digitlst.h, pluralaffix.h, datefmt.h, and others for similar examples.
+//
+#if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
+template class U_I18N_API MaybeStackArray<SpanInfo, 8>;
+#endif
+
+/**
+ * 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();
+
+ FormattedValueStringBuilderImpl(FormattedValueStringBuilderImpl&&) = default;
+ FormattedValueStringBuilderImpl& operator=(FormattedValueStringBuilderImpl&&) = default;
+
+ // Implementation of FormattedValue (const):
+
+ UnicodeString toString(UErrorCode& status) const override;
+ UnicodeString toTempString(UErrorCode& status) const override;
+ Appendable& appendTo(Appendable& appendable, UErrorCode& status) const override;
+ UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const 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;
+ }
+ void resetString();
+
+ /**
+ * Adds additional metadata used for span fields.
+ *
+ * category: the category to use for the span field.
+ * spanValue: the value of the span field: index of the list item, for example.
+ * start: the start position within the string of the span. -1 if unknown.
+ * length: the length of the span, used to split adjacent fields.
+ */
+ void appendSpanInfo(UFieldCategory category, int32_t spanValue, int32_t start, int32_t length, UErrorCode& status);
+ void prependSpanInfo(UFieldCategory category, int32_t spanValue, int32_t start, int32_t length, UErrorCode& status);
+
+private:
+ FormattedStringBuilder fString;
+ FormattedStringBuilder::Field fNumericField;
+ MaybeStackArray<SpanInfo, 8> spanIndices;
+ int32_t spanIndicesCount = 0;
+
+ bool nextPositionImpl(ConstrainedFieldPosition& cfpos, FormattedStringBuilder::Field numericField, UErrorCode& status) const;
+ static bool isIntOrGroup(FormattedStringBuilder::Field field);
+ static bool isTrimmable(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) 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) 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_CAPI 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__