// Name: textfile.h
// Purpose: interface of wxTextFile
// Author: wxWidgets team
-// RCS-ID: $Id$
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
+// TODO: document wxTextBuffer
+
+/**
+ The line termination type.
+*/
+enum wxTextFileType
+{
+ wxTextFileType_None, //!< incomplete (the last line of the file only)
+ wxTextFileType_Unix, //!< line is terminated with 'LF' = 0xA = 10 = '\\n'
+ wxTextFileType_Dos, //!< line is terminated with 'CR' 'LF'
+ wxTextFileType_Mac, //!< line is terminated with 'CR' = 0xD = 13 = '\\r'
+ wxTextFileType_Os2 //!< line is terminated with 'CR' 'LF'
+};
+
/**
@class wxTextFile
- @wxheader{textfile.h}
The wxTextFile is a simple class which allows to work with text files on line by
line basis. It also understands the differences in line termination characters
One word of warning: the class is not at all optimized for big files and thus
it will load the file entirely into memory when opened. Of course, you should
- not
- work in this way with large files (as an estimation, anything over 1 Megabyte is
- surely too big for this class). On the other hand, it is not a serious
+ not work in this way with large files (as an estimation, anything over 1 Megabyte
+ is surely too big for this class). On the other hand, it is not a serious
limitation for small files like configuration files or program sources
which are well handled by wxTextFile.
The typical things you may do with wxTextFile in order are:
- Create and open it: this is done with either
- wxTextFile::Create or wxTextFile::Open
- function which opens the file (name may be specified either as the argument to
- these functions or in the constructor), reads its contents in memory (in the
- case of @c Open()) and closes it.
- Work with the lines in the file: this may be done either with "direct
- access" functions like wxTextFile::GetLineCount and
- wxTextFile::GetLine (@e operator[] does exactly the same
- but looks more like array addressing) or with "sequential access" functions
- which include wxTextFile::GetFirstLine/
- wxTextFile::GetNextLine and also
- wxTextFile::GetLastLine/wxTextFile::GetPrevLine.
- For the sequential access functions the current line number is maintained: it is
- returned by wxTextFile::GetCurrentLine and may be
- changed with wxTextFile::GoToLine.
- Add/remove lines to the file: wxTextFile::AddLine and
- wxTextFile::InsertLine add new lines while
- wxTextFile::RemoveLine deletes the existing ones.
- wxTextFile::Clear resets the file to empty.
- Save your changes: notice that the changes you make to the file will @b not be
- saved automatically; calling wxTextFile::Close or doing
- nothing discards them! To save the changes you must explicitly call
- wxTextFile::Write - here, you may also change the line
- termination type if you wish.
-
+ - Create and open it: this is done with either wxTextFile::Create or wxTextFile::Open
+ function which opens the file (name may be specified either as the argument to
+ these functions or in the constructor), reads its contents in memory (in the
+ case of wxTextFile::Open()) and closes it.
+ - Work with the lines in the file: this may be done either with "direct
+ access" functions like wxTextFile::GetLineCount and wxTextFile::GetLine
+ (@e operator[] does exactly the same but looks more like array addressing)
+ or with "sequential access" functions which include wxTextFile::GetFirstLine,
+ wxTextFile::GetNextLine and also wxTextFile::GetLastLine, wxTextFile::GetPrevLine.
+ For the sequential access functions the current line number is maintained: it is
+ returned by wxTextFile::GetCurrentLine and may be changed with wxTextFile::GoToLine.
+ - Add/remove lines to the file: wxTextFile::AddLine and wxTextFile::InsertLine
+ add new lines while wxTextFile::RemoveLine deletes the existing ones.
+ wxTextFile::Clear resets the file to empty.
+ - Save your changes: notice that the changes you make to the file will @b not be
+ saved automatically; calling wxTextFile::Close or doing nothing discards them!
+ To save the changes you must explicitly call wxTextFile::Write - here, you may
+ also change the line termination type if you wish.
@library{wxbase}
@category{file}
class wxTextFile
{
public:
+ /**
+ Default type for current platform determined at compile time.
+ */
+ static const wxTextFileType typeDefault;
+
+ /**
+ Default constructor, use Create() or Open() with a file name parameter to
+ initialize the object.
+ */
+ wxTextFile();
+
/**
Constructor does not load the file into memory, use Open() to do it.
*/
- wxTextFile(const wxString& strFile) const;
+ wxTextFile(const wxString& strFile);
/**
Destructor does nothing.
*/
- ~wxTextFile() const;
+ virtual ~wxTextFile();
/**
Adds a line to the end of file.
*/
- void AddLine(const wxString& str,
- wxTextFileType type = typeDefault) const;
+ void AddLine(const wxString& str, wxTextFileType type = typeDefault);
/**
Delete all lines from the file, set current line number to 0.
*/
- void Clear() const;
+ void Clear();
/**
- Closes the file and frees memory, @b losing all changes. Use Write()
- if you want to save them.
+ Closes the file and frees memory, @b "losing all changes".
+ Use Write() if you want to save them.
*/
- bool Close() const;
+ bool Close();
- //@{
/**
- Creates the file with the given name or the name which was given in the
- @ref ctor() constructor. The array of file lines is initially
- empty.
- It will fail if the file already exists, Open() should
- be used in this case.
+ Creates the file with the name which was given in the
+ wxTextFile(const wxString&) constructor.
+ The array of file lines is initially empty.
+
+ It will fail if the file already exists, Open() should be used in this case.
*/
- bool Create() const;
- const bool Create(const wxString& strFile) const;
- //@}
+ bool Create();
+
+ /**
+ Creates the file with the given name.
+ The array of file lines is initially empty.
+
+ It will fail if the file already exists, Open() should be used in this case.
+ */
+ bool Create(const wxString& strFile);
/**
Returns @true if the current line is the last one.
/**
Returns the current line: it has meaning only when you're using
GetFirstLine()/GetNextLine() functions, it doesn't get updated when
- you're using "direct access" functions like GetLine(). GetFirstLine() and
- GetLastLine() also change the value of the current line, as well as
- GoToLine().
+ you're using "direct access" functions like GetLine().
+ GetFirstLine() and GetLastLine() also change the value of the current line,
+ as well as GoToLine().
*/
size_t GetCurrentLine() const;
/**
- Get the line termination string corresponding to given constant. @e typeDefault
- is
- the value defined during the compilation and corresponds to the native format
- of the platform, i.e. it will be wxTextFileType_Dos under Windows,
- wxTextFileType_Unix under Unix (including Mac OS X when compiling with the
- Apple Developer Tools) and wxTextFileType_Mac under Mac OS (including
- Mac OS X when compiling with CodeWarrior).
+ Get the line termination string corresponding to given constant.
+
+ @e typeDefault is the value defined during the compilation and corresponds
+ to the native format of the platform, i.e. it will be @c wxTextFileType_Dos
+ under Windows and @c wxTextFileType_Unix under Unix (including Mac OS
+ X, the value @c wxTextFileType_Mac was only used for classic Mac OS
+ versions).
*/
- static const char* GetEOL(wxTextFileType type = typeDefault) const;
+ static const wxChar* GetEOL(wxTextFileType type = typeDefault);
/**
- This method together with GetNextLine()
- allows more "iterator-like" traversal of the list of lines, i.e. you may
- write something like:
+ This method together with GetNextLine() allows more "iterator-like"
+ traversal of the list of lines, i.e. you may write something like:
+
+ @code
+ wxTextFile file;
+ ...
+ for ( str = file.GetFirstLine(); !file.Eof(); str = file.GetNextLine() )
+ {
+ // do something with the current line in str
+ }
+ // do something with the last line in str
+ @endcode
*/
- wxString GetFirstLine() const;
+ wxString& GetFirstLine();
/**
- Gets the last line of the file. Together with
- GetPrevLine() it allows to enumerate the lines
+ Gets the last line of the file.
+
+ Together with GetPrevLine() it allows to enumerate the lines
in the file from the end to the beginning like this:
+
+ @code
+ wxTextFile file;
+ ...
+ for ( str = file.GetLastLine();
+ file.GetCurrentLine() > 0;
+ str = file.GetPrevLine() )
+ {
+ // do something with the current line in str
+ }
+ // do something with the first line in str
+ @endcode
*/
- wxString GetLastLine();
+ wxString& GetLastLine();
/**
- Retrieves the line number @a n from the file. The returned line may be
- modified but you shouldn't add line terminator at the end - this will be done
- by wxTextFile.
+ Retrieves the line number @a n from the file.
+
+ The returned line may be modified when non-const method is used but you
+ shouldn't add line terminator at the end -- this will be done by
+ wxTextFile itself.
*/
- wxString GetLine(size_t n) const;
+ //@{
+ wxString& GetLine(size_t n);
+ const wxString& GetLine(size_t n) const;
+ //@}
/**
Get the number of lines in the file.
size_t GetLineCount() const;
/**
- Get the type of the line (see also wxTextFile::GetEOL)
+ Get the type of the line (see also wxTextFile::GetEOL).
*/
wxTextFileType GetLineType(size_t n) const;
/**
Get the name of the file.
*/
- const char* GetName() const;
+ const wxString& GetName() const;
/**
- Gets the next line (see GetFirstLine() for
- the example).
+ Gets the next line (see GetFirstLine() for the example).
*/
- wxString GetNextLine();
+ wxString& GetNextLine();
/**
Gets the previous line in the file.
*/
- wxString GetPrevLine();
+ wxString& GetPrevLine();
/**
- Changes the value returned by GetCurrentLine()
- and used by wxTextFile::GetFirstLine/GetNextLine().
+ Changes the value returned by GetCurrentLine() and used by GetFirstLine()
+ and GetNextLine().
*/
- void GoToLine(size_t n) const;
+ void GoToLine(size_t n);
/**
- Guess the type of file (which is supposed to be opened). If sufficiently
- many lines of the file are in DOS/Unix/Mac format, the corresponding value will
- be returned. If the detection mechanism fails wxTextFileType_None is returned.
+ Guess the type of file (which is supposed to be opened).
+
+ If sufficiently many lines of the file are in DOS/Unix/Mac format,
+ the corresponding value will be returned.
+ If the detection mechanism fails @c wxTextFileType_None is returned.
*/
wxTextFileType GuessType() const;
/**
- Insert a line before the line number @e n.
+ Insert a line before the line number @a n.
*/
void InsertLine(const wxString& str, size_t n,
- wxTextFileType type = typeDefault) const;
+ wxTextFileType type = typeDefault);
/**
Returns @true if the file is currently opened.
*/
bool IsOpened() const;
- //@{
/**
- )
- Open() opens the file with the given name or the name which was given in the
- @ref ctor() constructor and also loads file in memory on
- success. It will fail if the file does not exist,
- Create() should be used in this case.
- The @e conv argument is only meaningful in Unicode build of wxWidgets when
+ Opens the file with the name which was given in the wxTextFile(const wxString&)
+ constructor and also loads file in memory on success.
+
+ It will fail if the file does not exist, Create() should be used in this case.
+
+ The @a conv argument is only meaningful in Unicode build of wxWidgets when
it is used to convert the file to wide character representation.
*/
- bool Open() const;
- const bool Open(const wxString& strFile) const;
- //@}
+ bool Open(const wxMBConv& conv = wxConvAuto());
+
+ /**
+ Opens the file with the given name and also loads file in memory on success.
+
+ It will fail if the file does not exist, Create() should be used in this case.
+
+ The @a conv argument is only meaningful in Unicode build of wxWidgets when
+ it is used to convert the file to wide character representation.
+ */
+ bool Open(const wxString& strFile, const wxMBConv& conv = wxConvAuto());
/**
Delete line number @a n from the file.
*/
- void RemoveLine(size_t n) const;
+ void RemoveLine(size_t n);
/**
- )
- Change the file on disk. The @a typeNew parameter allows you to change the
- file format (default argument means "don't change type") and may be used to
- convert, for example, DOS files to Unix.
- The @e conv argument is only meaningful in Unicode build of wxWidgets when
- it is used to convert all lines to multibyte representation before writing them
+ Change the file on disk.
+
+ The @a typeNew parameter allows you to change the file format
+ (default argument means "don't change type") and may be used to convert,
+ for example, DOS files to Unix.
+
+ The @a conv argument is only meaningful in Unicode build of wxWidgets when
+ it is used to convert all lines to multibyte representation before writing
them to physical file.
- Returns @true if operation succeeded, @false if it failed.
+
+ @return
+ @true if operation succeeded, @false if it failed.
*/
- bool Write(wxTextFileType typeNew = wxTextFileType_None) const;
+ bool Write(wxTextFileType typeNew = wxTextFileType_None,
+ const wxMBConv& conv = wxConvAuto());
/**
The same as GetLine().
*/
- wxString operator[](size_t n) const;
+ wxString& operator[](size_t n) const;
};
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