C++ wxJSONValue类代码示例

bool eSettings::AddReplace(const wxString& pattern) {
	wxJSONValue& replacements = m_jsonRoot[wxT("replaceHistory")];

	// Don't add duplicates
	if (replacements.Size() > 0) {
		const wxJSONValue last = replacements.ItemAt(0);
		if (last.AsString() == pattern) return false;
		
		// Check if there should be a duplicate lower down
		for (int i = 0; i < replacements.Size(); ++i) {
			if (replacements[i].AsString() == pattern) {
				replacements.Remove(i);
				break;
			}
		}
	}
	
	// Add the new item
	replacements.Insert(0, pattern);

	// Limit number of items to save
	if (replacements.Size() > 20) replacements.Remove(replacements.Size()-1);

	return true;
}

bool eSettings::AddFilterCommand(const wxString& command) {
	wxJSONValue& values = m_jsonRoot[wxT("filterCommandHistory")];

	// Don't add duplicates
	if (values.Size() > 0) {
		const wxJSONValue last = values.ItemAt(0);
		if (last.AsString() == command) return false;
		
		// Check if there should be a duplicate lower down
		for (int i = 0; i < values.Size(); ++i) {
			if (values[i].AsString() == command) {
				values.Remove(i);
				break;
			}
		}
	}
	
	// Add the new item
	values.Insert(0, command);

	// Limit number of items to save
	if (values.Size() > 20) values.Remove(values.Size()-1);

	return true;
}

wxString eSettings::GetRemoteProfileName(size_t profile_id) const {
	const wxJSONValue remotes = m_jsonRoot.ItemAt(wxT("remoteProfiles"));
	wxASSERT((int)profile_id < remotes.Size());
	const wxJSONValue profile = remotes.ItemAt(profile_id);
	
	return profile.ItemAt(wxT("name")).AsString();
}

//! Write the comment strings, if any.
int
wxJSONWriter::WriteComment( wxOutputStream& os, const wxJSONValue& value, bool indent )
{
    // the function returns the last character written which should be
    // a LF char or -1 in case of errors
    // if nothing is written, returns ZERO
    int lastChar = 0;

    // only write comments if the style include the WRITE_COMMENTS flag
    if ( (m_style & wxJSONWRITER_WRITE_COMMENTS ) == 0 ) {
        return lastChar;
    }

    const wxArrayString cmt = value.GetCommentArray();
    int cmtSize = cmt.GetCount();
    for ( int i = 0; i < cmtSize; i++ )    {
        if ( indent )    {
            WriteIndent( os );
        }
        else    {
            os.PutC( '\t' );
        }
        WriteString( os, cmt[i]);
        lastChar = cmt[i].Last();
        if ( lastChar != '\n' )   {
            os.PutC( '\n' );
            lastChar = '\n';
        }
    }
    return lastChar;
}

/*!
 This function is called for every value objects of INT type.
 This function uses the \n snprintf function to get the US-ASCII
 representation of the integer and simply copy it to the output stream.
 Returns -1 on stream errors or ZERO if no errors.
*/
int
wxJSONWriter::WriteIntValue( wxOutputStream& os, const wxJSONValue& value )
{
    int r = 0;
    char buffer[32];        // need to store 64-bits integers (max 20 digits)
    size_t len;

    wxJSONRefData* data = value.GetRefData();
    wxASSERT( data );

#if defined( wxJSON_64BIT_INT )

        // this is for wxW 2.8 Unicode: in order to use the cross-platform
        // format specifier, we use the wxString's sprintf() function and then
        // convert to UTF-8 before writing to the stream
        wxString s;
        s.Printf( _T("%") wxLongLongFmtSpec _T("d"),
                                                data->m_value.m_valInt64 );
        wxCharBuffer cb = s.ToUTF8();
        const char* cbData = cb.data();
        len = strlen( cbData );
        wxASSERT( len < 32 );
        memcpy( buffer, cbData, len );
        buffer[len] = 0;
    
#else
    snprintf( buffer, 32, "%ld", data->m_value.m_valLong );
#endif
    len = strlen( buffer );
    os.Write( buffer, len );
    if ( os.GetLastError() != wxSTREAM_NO_ERROR )    {
        r = -1;
    }
    return r;
}

bool eSettings::GetSettingBool(const wxString& name, bool& value) const {
	if (!m_jsonRoot.HasMember(wxT("settings"))) return false;

	const wxJSONValue settings = m_jsonRoot.ItemAt(wxT("settings"));
	if (!settings.HasMember(name)) return false;

	// old bool values may have been stored as ints
	const wxJSONValue val = settings.ItemAt(name);
	if (val.IsInt()) return (val.AsInt() > 0);

	if (!val.IsBool()) return false;

	value = val.AsBool();
	return true;
}

/*!
 This function is called for every value objects of DOUBLE type.
 This function uses the \n snprintf function to get the US-ASCII
 representation of the integer and simply copy it to the output stream.
 Returns -1 on stream errors or ZERO if no errors.

 Note that writing a double to a decimal ASCII representation could
 lay to unexpected results depending on the format string used in the
 conversion.
 See SetDoubleFmtString for details.
*/
int
wxJSONWriter::WriteDoubleValue( wxOutputStream& os, const wxJSONValue& value )
{
    int r = 0;

    char buffer[32];
    wxJSONRefData* data = value.GetRefData();
    wxASSERT( data );
    snprintf( buffer, 32, m_fmt, data->m_value.m_valDouble );
    size_t len = strlen( buffer );
    os.Write( buffer, len );
    if ( os.GetLastError() != wxSTREAM_NO_ERROR )    {
        r = -1;
    }
    return r;
}

/*!
 This function is called for every value objects of UINT type.
 This function uses the \n snprintf function to get the US-ASCII
 representation of the integer and simply copy it to the output stream.
 The function prepends a \b plus \b sign if the \c wxJSONWRITER_RECOGNIZE_UNSIGNED
 flag is set in the \c m_flags data member.
 Returns -1 on stream errors or ZERO if no errors.
*/
int
wxJSONWriter::WriteUIntValue( wxOutputStream& os, const wxJSONValue& value )
{
    int r = 0; size_t len;

    // prepend a plus sign if the style specifies that unsigned integers
    // have to be recognized by the JSON reader
    if ( m_style & wxJSONWRITER_RECOGNIZE_UNSIGNED )  {
        os.PutC( '+' );
    }

    char buffer[32];        // need to store 64-bits integers (max 20 digits)
    wxJSONRefData* data = value.GetRefData();
    wxASSERT( data );

#if defined( wxJSON_64BIT_INT )
    #if wxCHECK_VERSION(2, 9, 0 ) || !defined( wxJSON_USE_UNICODE )
        // this is fine for wxW 2.9 and for wxW 2.8 ANSI
        snprintf( buffer, 32, "%" wxLongLongFmtSpec "u",
                data->m_value.m_valUInt64 );
    #elif wxCHECK_VERSION(3, 0, 0) || !defined( wxJSON_USE_UNICODE )
        snprintf( buffer, 32, "%" wxLongLongFmtSpec "u",
             data->m_value.m_valUInt64 );
    #else
        // this is for wxW 2.8 Unicode: in order to use the cross-platform
        // format specifier, we use the wxString's sprintf() function and then
        // convert to UTF-8 before writing to the stream
        wxString s;
        s.Printf( _T("%") wxLongLongFmtSpec _T("u"),
                data->m_value.m_valInt64 );
        wxCharBuffer cb = s.ToUTF8();
        const char* cbData = cb.data();
        len = strlen( cbData );
        wxASSERT( len < 32 );
        memcpy( buffer, cbData, len );
        buffer[len] = 0;
    #endif
#else
    snprintf( buffer, 32, "%lu", data->m_value.m_valULong );
#endif
    len = strlen( buffer );
    os.Write( buffer, len );
    if ( os.GetLastError() != wxSTREAM_NO_ERROR )    {
        r = -1;
    }
    return r;
}

bool eSettings::GetSettingString(const wxString& name, wxString& value) const {
	if (!m_jsonRoot.HasMember(wxT("settings"))) return false;

	const wxJSONValue settings = m_jsonRoot.ItemAt(wxT("settings"));
	if (!settings.HasMember(name)) return false;

	const wxJSONValue val = settings.ItemAt(name);
	if (!val.IsString()) return false;

	value = val.AsString();
	return true;
}

/*!
 This function is called for every value objects of DOUBLE type.
 This function uses the \n snprintf function to get the US-ASCII
 representation of the integer and simply copy it to the output stream.
 Returns -1 on stream errors or ZERO if no errors.

 Note that writing a double to a decimal ASCII representation could
 lay to unexpected results depending on the format string used in the
 conversion.
 See SetDoubleFmtString for details.
*/
int
wxJSONWriter::WriteDoubleValue( wxOutputStream& os, const wxJSONValue& value )
{
    int r = 0;

    wxJSONRefData* data = value.GetRefData();
    wxASSERT( data );

    char* writeBuff = 0;
    // the buffer that has to be written is either UTF-8 or ANSI c_str() depending
    // on the 'm_noUtf8' flag
    wxCharBuffer utf8CB = wxString::FromCDouble(data->m_value.m_valDouble, 10).ToUTF8();        // the UTF-8 buffer
#if !defined(wxJSON_USE_UNICODE)
    wxCharBuffer ansiCB(str.c_str());        // the ANSI buffer    
    if (m_noUtf8)    
    {
        writeBuff = ansiCB.data();
    }
    else    
    {
        writeBuff = utf8CB.data();
    }
   #else
       writeBuff = utf8CB.data();
   #endif
        
    // NOTE: in ANSI builds UTF-8 conversion may fail (see samples/test5.cpp,
    // test 7.3) although I do not know why
    if (writeBuff == 0)    
    {
        const char* err = "<wxJSONWriter::WriteComment(): error converting the double to UTF-8>";
        os.Write(err, strlen(err));
        return 0;
    }
    size_t len = strlen(writeBuff);
    
    os.Write(writeBuff, len);
    if (os.GetLastError() != wxSTREAM_NO_ERROR)    
    {
        r = -1;
    }
    return r;
}

void eSettings::AddToRecent(const wxString& key, wxJSONValue& jsonArray, size_t max) {
	const wxJSONValue value(key);

	// Check if value is already in array
	int ndx = -1;
	for (int i = 0; i < jsonArray.Size(); ++i) {
		if (value.IsSameAs(jsonArray.ItemAt(i))) {
			ndx = i;
			break;
		}
	}

	if (ndx == 0) return; // No need to do anything if path is already top
	
	if (ndx > 0) jsonArray.Remove(ndx); // remove duplicate entry

	// Insert value at top
	jsonArray.Insert(0, value);

	// Make sure we have no more than max entries
	if (jsonArray.Size() > (int)max) jsonArray.Remove(max);
}

size_t eSettings::GetSearchCount() const {
	if (!m_jsonRoot.HasMember(wxT("searchHistory"))) return 0;

	const wxJSONValue searches = m_jsonRoot.ItemAt(wxT("searchHistory"));
	return searches.Size();
}

/*!
 This is a recursive function that gets the type of the \c value object and
 calls several protected functions depending on the type:

 \li \c WriteNullvalue for type NULL
 \li \c WriteStringValue() for STRING and CSTRING types
 \li \c WriteIntValue for INT types
 \li \c WriteUIntValue for UINT types
 \li \c WriteBoolValue for BOOL types
 \li \c WriteDoubleValue for DOUBLE types
 \li \c WriteMemoryBuff for MEMORYBUFF types

 If the value is an array or key/value map (types ARRAY and OBJECT), the function
 iterates through all JSON value object in the array/map and calls itself for every
 item in the container.
*/
int
wxJSONWriter::DoWrite( wxOutputStream& os, const wxJSONValue& value, const wxString* key, bool comma )
{
    // note that this function is recursive

    // some variables that cannot be allocated in the switch statement
    const wxJSONInternalMap* map = 0;
    int size;
    m_colNo = 1; m_lineNo = 1;
    // determine the comment position; it is one of:
    //
    //  wxJSONVALUE_COMMENT_BEFORE
    //  wxJSONVALUE_COMMENT_AFTER
    //  wxJSONVALUE_COMMENT_INLINE
    //
    // or -1 if comments have not to be written
    int commentPos = -1;
    if ( value.GetCommentCount() > 0 && (m_style & wxJSONWRITER_WRITE_COMMENTS))  {
        commentPos = value.GetCommentPos();
        if ( ( m_style & wxJSONWRITER_COMMENTS_BEFORE) != 0 ) {
            commentPos = wxJSONVALUE_COMMENT_BEFORE;
        }
        else if ( (m_style & wxJSONWRITER_COMMENTS_AFTER) != 0 ) {
            commentPos = wxJSONVALUE_COMMENT_AFTER;
        }
    }

    int lastChar = 0;  // check if WriteComment() writes the last LF char

    // first write the comment if it is BEFORE
    if ( commentPos == wxJSONVALUE_COMMENT_BEFORE )   {
        lastChar = WriteComment( os, value, true );
        if ( lastChar < 0 )   {
            return lastChar;
        }
        else if ( lastChar != '\n' )  {
            WriteSeparator( os );
        }
    }

    lastChar = WriteIndent( os );
    if ( lastChar < 0 )   {
        return lastChar;
    }

    // now write the key if it is not NULL
    if ( key )   {
        lastChar = WriteKey( os, *key );
    }
    if ( lastChar < 0 )   {
        return lastChar;
    }

    // now write the value
    wxJSONInternalMap::const_iterator it;    // declare the map object
    long int count = 0;

    wxJSONType t = value.GetType();
    switch ( t )  {
    case wxJSONTYPE_INVALID :
        WriteInvalid( os );
        wxFAIL_MSG( _T("wxJSONWriter::WriteEmpty() cannot be called (not a valid JSON text"));
        break;

    case wxJSONTYPE_INT :
    case wxJSONTYPE_SHORT :
    case wxJSONTYPE_LONG :
    case wxJSONTYPE_INT64 :
        lastChar = WriteIntValue( os, value );
        break;

    case wxJSONTYPE_UINT :
    case wxJSONTYPE_USHORT :
    case wxJSONTYPE_ULONG :
    case wxJSONTYPE_UINT64 :
        lastChar = WriteUIntValue( os, value );
        break;

    case wxJSONTYPE_NULL :
        lastChar = WriteNullValue( os );
        break;
    case wxJSONTYPE_BOOL :
        lastChar = WriteBoolValue( os, value );
        break;
//.........这里部分代码省略.........

size_t eSettings::GetPageCount() const {
	if (!m_jsonRoot.HasMember(wxT("pages"))) return 0;

	const wxJSONValue pages = m_jsonRoot.ItemAt(wxT("pages"));
	return pages.Size();
}

void eSettings::GetRecents(const wxJSONValue& jarray, wxArrayString& recents) const {
	for (int i = 0; i < jarray.Size(); ++i) {
		recents.Add(jarray.ItemAt(i).AsString());
	}
}