msgfmt.h

Go to the documentation of this file.

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
* Copyright (C) 2007-2013, International Business Machines Corporation and
* others. All Rights Reserved.
********************************************************************************
*
* File MSGFMT.H
*
* Modification History:
*
*   Date        Name        Description
*   02/19/97    aliu        Converted from java.
*   03/20/97    helena      Finished first cut of implementation.
*   07/22/98    stephen     Removed operator!= (defined in Format)
*   08/19/2002  srl         Removing Javaisms
*******************************************************************************/
 
#ifndef MSGFMT_H
#define MSGFMT_H
 
#include "unicode/utypes.h"
 
#if U_SHOW_CPLUSPLUS_API
 
#if !UCONFIG_NO_FORMATTING
 
#include "unicode/format.h"
#include "unicode/locid.h"
#include "unicode/messagepattern.h"
#include "unicode/parseerr.h"
#include "unicode/plurfmt.h"
#include "unicode/plurrule.h"
 
U_CDECL_BEGIN
// Forward declaration.
struct UHashtable;
typedef struct UHashtable UHashtable; 
U_CDECL_END
 
U_NAMESPACE_BEGIN
 
class AppendableWrapper;
class DateFormat;
class NumberFormat;
 
class U_I18N_API MessageFormat : public Format {
public:
#ifndef U_HIDE_OBSOLETE_API
    enum EFormatNumber {
        kMaxFormat = 10
    };
#endif  /* U_HIDE_OBSOLETE_API */
 
    MessageFormat(const UnicodeString& pattern,
                  UErrorCode &status);
 
    MessageFormat(const UnicodeString& pattern,
                  const Locale& newLocale,
                        UErrorCode& status);
    MessageFormat(const UnicodeString& pattern,
                  const Locale& newLocale,
                  UParseError& parseError,
                  UErrorCode& status);
    MessageFormat(const MessageFormat&);
 
    const MessageFormat& operator=(const MessageFormat&);
 
    virtual ~MessageFormat();
 
    virtual MessageFormat* clone() const override;
 
    virtual bool operator==(const Format& other) const override;
 
    virtual void setLocale(const Locale& theLocale);
 
    virtual const Locale& getLocale() const;
 
    virtual void applyPattern(const UnicodeString& pattern,
                              UErrorCode& status);
    virtual void applyPattern(const UnicodeString& pattern,
                             UParseError& parseError,
                             UErrorCode& status);
 
    virtual void applyPattern(const UnicodeString& pattern,
                              UMessagePatternApostropheMode aposMode,
                              UParseError* parseError,
                              UErrorCode& status);
 
    UMessagePatternApostropheMode getApostropheMode() const {
        return msgPattern.getApostropheMode();
    }
 
    virtual UnicodeString& toPattern(UnicodeString& appendTo) const;
 
    virtual void adoptFormats(Format** formatsToAdopt, int32_t count);
 
    virtual void setFormats(const Format** newFormats, int32_t cnt);
 
 
    virtual void adoptFormat(int32_t formatNumber, Format* formatToAdopt);
 
    virtual void setFormat(int32_t formatNumber, const Format& format);
 
    virtual StringEnumeration* getFormatNames(UErrorCode& status);
 
    virtual Format* getFormat(const UnicodeString& formatName, UErrorCode& status);
 
    virtual void setFormat(const UnicodeString& formatName, const Format& format, UErrorCode& status);
 
    virtual void adoptFormat(const UnicodeString& formatName, Format* formatToAdopt, UErrorCode& status);
 
    virtual const Format** getFormats(int32_t& count) const;
 
 
    using Format::format;
 
    UnicodeString& format(const Formattable* source,
                          int32_t count,
                          UnicodeString& appendTo,
                          FieldPosition& ignore,
                          UErrorCode& status) const;
 
    static UnicodeString& format(const UnicodeString& pattern,
                                 const Formattable* arguments,
                                 int32_t count,
                                 UnicodeString& appendTo,
                                 UErrorCode& status);
 
    virtual UnicodeString& format(const Formattable& obj,
                                  UnicodeString& appendTo,
                                  FieldPosition& pos,
                                  UErrorCode& status) const override;
 
    UnicodeString& format(const UnicodeString* argumentNames,
                          const Formattable* arguments,
                          int32_t count,
                          UnicodeString& appendTo,
                          UErrorCode& status) const;
    virtual Formattable* parse(const UnicodeString& source,
                               ParsePosition& pos,
                               int32_t& count) const;
 
    virtual Formattable* parse(const UnicodeString& source,
                               int32_t& count,
                               UErrorCode& status) const;
 
    virtual void parseObject(const UnicodeString& source,
                             Formattable& result,
                             ParsePosition& pos) const override;
 
    static UnicodeString autoQuoteApostrophe(const UnicodeString& pattern,
        UErrorCode& status);
 
 
    UBool usesNamedArguments() const;
 
 
#ifndef U_HIDE_INTERNAL_API
    int32_t getArgTypeCount() const;
#endif  /* U_HIDE_INTERNAL_API */
 
    virtual UClassID getDynamicClassID() const override;
 
    static UClassID U_EXPORT2 getStaticClassID();
 
#ifndef U_HIDE_INTERNAL_API
    static UBool equalFormats(const void* left, const void* right);
#endif  /* U_HIDE_INTERNAL_API */
 
private:
 
    Locale              fLocale;
    MessagePattern      msgPattern;
    Format**            formatAliases; // see getFormats
    int32_t             formatAliasesCapacity;
 
    MessageFormat() = delete; // default constructor not implemented
 
    class U_I18N_API PluralSelectorProvider : public PluralFormat::PluralSelector {
    public:
        PluralSelectorProvider(const MessageFormat &mf, UPluralType type);
        virtual ~PluralSelectorProvider();
        virtual UnicodeString select(void *ctx, double number, UErrorCode& ec) const override;
 
        void reset();
    private:
        const MessageFormat &msgFormat;
        PluralRules* rules;
        UPluralType type;
    };
 
    Formattable::Type* argTypes;
    int32_t            argTypeCount;
    int32_t            argTypeCapacity;
 
    UBool hasArgTypeConflicts;
 
    // Variable-size array management
    UBool allocateArgTypes(int32_t capacity, UErrorCode& status);
 
    NumberFormat* defaultNumberFormat;
    DateFormat*   defaultDateFormat;
 
    UHashtable* cachedFormatters;
    UHashtable* customFormatArgStarts;
 
    PluralSelectorProvider pluralProvider;
    PluralSelectorProvider ordinalProvider;
 
    const NumberFormat* getDefaultNumberFormat(UErrorCode&) const;
    const DateFormat*   getDefaultDateFormat(UErrorCode&) const;
 
    static int32_t findKeyword( const UnicodeString& s,
                                const char16_t * const *list);
 
    UnicodeString& format(const Formattable* arguments,
                          const UnicodeString *argumentNames,
                          int32_t cnt,
                          UnicodeString& appendTo,
                          FieldPosition* pos,
                          UErrorCode& status) const;
 
    void format(int32_t msgStart,
                const void *plNumber,
                const Formattable* arguments,
                const UnicodeString *argumentNames,
                int32_t cnt,
                AppendableWrapper& appendTo,
                FieldPosition* pos,
                UErrorCode& success) const;
 
    UnicodeString getArgName(int32_t partIndex);
 
    void setArgStartFormat(int32_t argStart, Format* formatter, UErrorCode& status);
 
    void setCustomArgStartFormat(int32_t argStart, Format* formatter, UErrorCode& status);
 
    int32_t nextTopLevelArgStart(int32_t partIndex) const;
 
    UBool argNameMatches(int32_t partIndex, const UnicodeString& argName, int32_t argNumber);
 
    void cacheExplicitFormats(UErrorCode& status);
 
    Format* createAppropriateFormat(UnicodeString& type,
                                    UnicodeString& style,
                                    Formattable::Type& formattableType,
                                    UParseError& parseError,
                                    UErrorCode& ec);
 
    const Formattable* getArgFromListByName(const Formattable* arguments,
                                            const UnicodeString *argumentNames,
                                            int32_t cnt, UnicodeString& name) const;
 
    Formattable* parse(int32_t msgStart,
                       const UnicodeString& source,
                       ParsePosition& pos,
                       int32_t& count,
                       UErrorCode& ec) const;
 
    FieldPosition* updateMetaData(AppendableWrapper& dest, int32_t prevLength,
                                  FieldPosition* fp, const Formattable* argId) const;
 
    int32_t findOtherSubMessage(int32_t partIndex) const;
 
    int32_t findFirstPluralNumberArg(int32_t msgStart, const UnicodeString &argName) const;
 
    Format* getCachedFormatter(int32_t argumentNumber) const;
 
    UnicodeString getLiteralStringUntilNextArgument(int32_t from) const;
 
    void copyObjects(const MessageFormat& that, UErrorCode& ec);
 
    void formatComplexSubMessage(int32_t msgStart,
                                 const void *plNumber,
                                 const Formattable* arguments,
                                 const UnicodeString *argumentNames,
                                 int32_t cnt,
                                 AppendableWrapper& appendTo,
                                 UErrorCode& success) const;
 
    NumberFormat* createIntegerFormat(const Locale& locale, UErrorCode& status) const;
 
    const Formattable::Type* getArgTypeList(int32_t& listCount) const {
        listCount = argTypeCount;
        return argTypes;
    }
 
    void resetPattern();
 
    class U_I18N_API DummyFormat : public Format {
    public:
        virtual bool operator==(const Format&) const override;
        virtual DummyFormat* clone() const override;
        virtual UnicodeString& format(const Formattable& obj,
                              UnicodeString& appendTo,
                              UErrorCode& status) const;
        virtual UnicodeString& format(const Formattable&,
                                      UnicodeString& appendTo,
                                      FieldPosition&,
                                      UErrorCode& status) const override;
        virtual UnicodeString& format(const Formattable& obj,
                                      UnicodeString& appendTo,
                                      FieldPositionIterator* posIter,
                                      UErrorCode& status) const override;
        virtual void parseObject(const UnicodeString&,
                                 Formattable&,
                                 ParsePosition&) const override;
    };
 
    friend class MessageFormatAdapter; // getFormatTypeList() access
};
 
U_NAMESPACE_END
 
#endif /* #if !UCONFIG_NO_FORMATTING */
 
#endif /* U_SHOW_CPLUSPLUS_API */
 
#endif // _MSGFMT
//eof