264 lines
9.8 KiB
C
264 lines
9.8 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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// Name: wx/fileconf.h
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// Purpose: wxFileConfig derivation of wxConfigBase
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 07.04.98 (adapted from appconf.cpp)
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// Copyright: (c) 1997 Karsten Ballueder & Vadim Zeitlin
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// Ballueder@usa.net <zeitlin@dptmaths.ens-cachan.fr>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _FILECONF_H
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#define _FILECONF_H
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#include "wx/defs.h"
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#if wxUSE_CONFIG
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#include "wx/textfile.h"
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#include "wx/string.h"
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#include "wx/confbase.h"
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#include "wx/filename.h"
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// ----------------------------------------------------------------------------
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// wxFileConfig
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// ----------------------------------------------------------------------------
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/*
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wxFileConfig derives from base Config and implements file based config class,
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i.e. it uses ASCII disk files to store the information. These files are
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alternatively called INI, .conf or .rc in the documentation. They are
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organized in groups or sections, which can nest (i.e. a group contains
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subgroups, which contain their own subgroups &c). Each group has some
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number of entries, which are "key = value" pairs. More precisely, the format
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is:
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# comments are allowed after either ';' or '#' (Win/UNIX standard)
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# blank lines (as above) are ignored
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# global entries are members of special (no name) top group
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written_for = Windows
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platform = Linux
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# the start of the group 'Foo'
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[Foo] # may put comments like this also
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# following 3 lines are entries
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key = value
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another_key = " strings with spaces in the beginning should be quoted, \
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otherwise the spaces are lost"
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last_key = but you don't have to put " normally (nor quote them, like here)
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# subgroup of the group 'Foo'
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# (order is not important, only the name is: separator is '/', as in paths)
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[Foo/Bar]
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# entries prefixed with "!" are immutable, i.e. can't be changed if they are
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# set in the system-wide config file
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!special_key = value
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bar_entry = whatever
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[Foo/Bar/Fubar] # depth is (theoretically :-) unlimited
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# may have the same name as key in another section
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bar_entry = whatever not
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You have {read/write/delete}Entry functions (guess what they do) and also
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setCurrentPath to select current group. enum{Subgroups/Entries} allow you
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to get all entries in the config file (in the current group). Finally,
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flush() writes immediately all changed entries to disk (otherwise it would
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be done automatically in dtor)
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wxFileConfig manages not less than 2 config files for each program: global
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and local (or system and user if you prefer). Entries are read from both of
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them and the local entries override the global ones unless the latter is
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immutable (prefixed with '!') in which case a warning message is generated
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and local value is ignored. Of course, the changes are always written to local
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file only.
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The names of these files can be specified in a number of ways. First of all,
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you can use the standard convention: using the ctor which takes 'strAppName'
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parameter will probably be sufficient for 90% of cases. If, for whatever
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reason you wish to use the files with some other names, you can always use the
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second ctor.
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wxFileConfig also may automatically expand the values of environment variables
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in the entries it reads: for example, if you have an entry
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score_file = $HOME/.score
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a call to Read(&str, "score_file") will return a complete path to .score file
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unless the expansion was previously disabled with SetExpandEnvVars(false) call
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(it's on by default, the current status can be retrieved with
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IsExpandingEnvVars function).
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*/
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class WXDLLIMPEXP_FWD_BASE wxFileConfigGroup;
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class WXDLLIMPEXP_FWD_BASE wxFileConfigEntry;
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class WXDLLIMPEXP_FWD_BASE wxFileConfigLineList;
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#if wxUSE_STREAMS
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class WXDLLIMPEXP_FWD_BASE wxInputStream;
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class WXDLLIMPEXP_FWD_BASE wxOutputStream;
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#endif // wxUSE_STREAMS
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class WXDLLIMPEXP_BASE wxFileConfig : public wxConfigBase
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{
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public:
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// construct the "standard" full name for global (system-wide) and
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// local (user-specific) config files from the base file name.
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//
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// the following are the filenames returned by this functions:
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// global local
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// Unix /etc/file.ext ~/.file
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// Win %windir%\file.ext %USERPROFILE%\file.ext
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//
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// where file is the basename of szFile, ext is its extension
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// or .conf (Unix) or .ini (Win) if it has none
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static wxFileName GetGlobalFile(const wxString& szFile);
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static wxFileName GetLocalFile(const wxString& szFile, int style = 0);
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static wxString GetGlobalFileName(const wxString& szFile)
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{
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return GetGlobalFile(szFile).GetFullPath();
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}
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static wxString GetLocalFileName(const wxString& szFile, int style = 0)
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{
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return GetLocalFile(szFile, style).GetFullPath();
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}
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// ctor & dtor
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// New constructor: one size fits all. Specify wxCONFIG_USE_LOCAL_FILE or
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// wxCONFIG_USE_GLOBAL_FILE to say which files should be used.
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wxFileConfig(const wxString& appName = wxEmptyString,
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const wxString& vendorName = wxEmptyString,
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const wxString& localFilename = wxEmptyString,
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const wxString& globalFilename = wxEmptyString,
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long style = wxCONFIG_USE_LOCAL_FILE | wxCONFIG_USE_GLOBAL_FILE,
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const wxMBConv& conv = wxConvAuto());
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#if wxUSE_STREAMS
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// ctor that takes an input stream.
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wxFileConfig(wxInputStream &inStream, const wxMBConv& conv = wxConvAuto());
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#endif // wxUSE_STREAMS
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// dtor will save unsaved data
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virtual ~wxFileConfig();
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// under Unix, set the umask to be used for the file creation, do nothing
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// under other systems
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#ifdef __UNIX__
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void SetUmask(int mode) { m_umask = mode; }
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#else // !__UNIX__
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void SetUmask(int WXUNUSED(mode)) { }
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#endif // __UNIX__/!__UNIX__
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// implement inherited pure virtual functions
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virtual void SetPath(const wxString& strPath);
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virtual const wxString& GetPath() const;
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virtual bool GetFirstGroup(wxString& str, long& lIndex) const;
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virtual bool GetNextGroup (wxString& str, long& lIndex) const;
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virtual bool GetFirstEntry(wxString& str, long& lIndex) const;
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virtual bool GetNextEntry (wxString& str, long& lIndex) const;
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virtual size_t GetNumberOfEntries(bool bRecursive = false) const;
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virtual size_t GetNumberOfGroups(bool bRecursive = false) const;
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virtual bool HasGroup(const wxString& strName) const;
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virtual bool HasEntry(const wxString& strName) const;
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virtual bool Flush(bool bCurrentOnly = false);
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virtual bool RenameEntry(const wxString& oldName, const wxString& newName);
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virtual bool RenameGroup(const wxString& oldName, const wxString& newName);
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virtual bool DeleteEntry(const wxString& key, bool bGroupIfEmptyAlso = true);
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virtual bool DeleteGroup(const wxString& szKey);
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virtual bool DeleteAll();
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// additional, wxFileConfig-specific, functionality
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#if wxUSE_STREAMS
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// save the entire config file text to the given stream, note that the text
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// won't be saved again in dtor when Flush() is called if you use this method
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// as it won't be "changed" any more
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virtual bool Save(wxOutputStream& os, const wxMBConv& conv = wxConvAuto());
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#endif // wxUSE_STREAMS
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public:
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// functions to work with this list
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wxFileConfigLineList *LineListAppend(const wxString& str);
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wxFileConfigLineList *LineListInsert(const wxString& str,
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wxFileConfigLineList *pLine); // NULL => Prepend()
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void LineListRemove(wxFileConfigLineList *pLine);
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bool LineListIsEmpty();
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protected:
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virtual bool DoReadString(const wxString& key, wxString *pStr) const;
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virtual bool DoReadLong(const wxString& key, long *pl) const;
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#if wxUSE_BASE64
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virtual bool DoReadBinary(const wxString& key, wxMemoryBuffer* buf) const;
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#endif // wxUSE_BASE64
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virtual bool DoWriteString(const wxString& key, const wxString& szValue);
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virtual bool DoWriteLong(const wxString& key, long lValue);
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#if wxUSE_BASE64
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virtual bool DoWriteBinary(const wxString& key, const wxMemoryBuffer& buf);
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#endif // wxUSE_BASE64
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private:
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// GetXXXFileName helpers: return ('/' terminated) directory names
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static wxString GetGlobalDir();
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static wxString GetLocalDir(int style = 0);
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// common part of all ctors (assumes that m_str{Local|Global}File are already
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// initialized
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void Init();
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// common part of from dtor and DeleteAll
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void CleanUp();
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// parse the whole file
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void Parse(const wxTextBuffer& buffer, bool bLocal);
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// the same as SetPath("/")
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void SetRootPath();
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// real SetPath() implementation, returns true if path could be set or false
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// if path doesn't exist and createMissingComponents == false
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bool DoSetPath(const wxString& strPath, bool createMissingComponents);
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// set/test the dirty flag
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void SetDirty() { m_isDirty = true; }
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void ResetDirty() { m_isDirty = false; }
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bool IsDirty() const { return m_isDirty; }
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// member variables
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// ----------------
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wxFileConfigLineList *m_linesHead, // head of the linked list
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*m_linesTail; // tail
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wxFileName m_fnLocalFile, // local file name passed to ctor
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m_fnGlobalFile; // global
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wxString m_strPath; // current path (not '/' terminated)
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wxFileConfigGroup *m_pRootGroup, // the top (unnamed) group
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*m_pCurrentGroup; // the current group
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wxMBConv *m_conv;
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#ifdef __UNIX__
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int m_umask; // the umask to use for file creation
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#endif // __UNIX__
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bool m_isDirty; // if true, we have unsaved changes
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wxDECLARE_NO_COPY_CLASS(wxFileConfig);
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DECLARE_ABSTRACT_CLASS(wxFileConfig)
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};
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#endif
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// wxUSE_CONFIG
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#endif
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//_FILECONF_H
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