-// ----------------------------------------------------------------------------
-// various helper global functions
-// ----------------------------------------------------------------------------
-
-/*
- Replace environment variables ($SOMETHING) with their values. The format is
- $VARNAME or ${VARNAME} where VARNAME contains alphanumeric characters and
- '_' only. '$' must be escaped ('\$') in order to be taken literally.
- */
-extern wxString ExpandEnvVars(const wxString& str);
-
-/*
- Split path into parts removing '..' in progress
- */
-extern void SplitPath(wxArrayString& aParts, const char *sz);
-
-// ----------------------------------------------------------------------------
-// abstract base class wxConfig which defines the interface for derived classes
-//
-// wxConfig organizes the items in a tree-like structure (modeled after the
-// Unix/Dos filesystem). There are groups (directories) and keys (files).
-// There is always one current group given by the current path.
-//
-// Keys are pairs "key_name = value" where value may be of string or integer
-// (long) type (@@@ doubles and other types such as wxDate coming soon).
-// ----------------------------------------------------------------------------
-class wxConfig
-{
-public:
- // static functions
- // sets the config object, returns the previous pointer
- static wxConfig *Set(wxConfig *pConfig);
- // get the config object, creates it on demand
- static wxConfig *Get() { if ( !ms_pConfig ) Create(); return ms_pConfig; }
- // create a new config object
- static void Create();
-
- // ctor & virtual dtor
- wxConfig() { }
- virtual ~wxConfig();
-
- // path management
- // set current path: if the first character is '/', it's the absolute path,
- // otherwise it's a relative path. '..' is supported. If the strPath
- // doesn't exist it is created.
- virtual void SetPath(const wxString& strPath) = 0;
- // retrieve the current path (always as absolute path)
- virtual const wxString& GetPath() const = 0;
-
- // enumeration: all functions here return false when there are no more items.
- // you must pass the same lIndex to GetNext and GetFirst (don't modify it)
- // enumerate subgroups
- virtual bool GetFirstGroup(wxString& str, long& lIndex) = 0;
- virtual bool GetNextGroup (wxString& str, long& lIndex) = 0;
- // enumerate entries
- virtual bool GetFirstEntry(wxString& str, long& lIndex) = 0;
- virtual bool GetNextEntry (wxString& str, long& lIndex) = 0;
-
- // key access: returns TRUE if value was really read, FALSE if default used
- // (and if the key is not found the default value is returned.)
- // read a string from the key
- virtual bool Read(wxString *pStr, const char *szKey,
- const char *szDefault = NULL) const = 0;
- // another version using statis buffer - it means it will be overwritten
- // after each call to this function!
- virtual const char *Read(const char *szKey,
- const char *szDefault = NULL) const;
- // the same for longs
- long Read(const char *szKey, long lDefault) const
- { long l; Read(&l, szKey, lDefault); return l; }
- // and another version: returns true if default value is returned
- virtual bool Read(long *pl, const char *szKey, long lDefault = 0) const = 0;
-
- // write the value (return true on success)
- virtual bool Write(const char *szKey, const char *szValue) = 0;
- virtual bool Write(const char *szKey, long lValue) = 0;
- // permanently writes all changes
- virtual bool Flush(bool bCurrentOnly = FALSE) = 0;
-
- // delete entries/groups
- // deletes the specified entry and the group it belongs to if
- // it was the last key in it and the second parameter is true
- virtual bool DeleteEntry(const char *szKey,
- bool bDeleteGroupIfEmpty = TRUE) = 0;
- // delete the group (with all subgroups)
- virtual bool DeleteGroup(const char *szKey) = 0;
- // delete the whole underlying object (disk file, registry key, ...)
- // primarly for use by desinstallation routine.
- virtual bool DeleteAll() = 0;
-
-protected:
- static bool IsImmutable(const char *szKey)
- { return *szKey == APPCONF_IMMUTABLE_PREFIX; }
-
- // a handy little class which changes current path to the path of given entry
- // and restores it in dtor: so if you declare a local variable of this type,
- // you work in the entry directory and the path is automatically restored
- // when function returns
- class PathChanger
- {
- public:
- // ctor/dtor do path changing/restorin
- PathChanger(const wxConfig *pContainer, const wxString& strEntry);
- ~PathChanger();
-
- // get the key name
- const wxString& Name() const { return m_strName; }
-
- private:
- wxConfig *m_pContainer; // object we live in
- wxString m_strName, // name of entry (i.e. name only)
- m_strOldPath; // saved path
- bool m_bChanged; // was the path changed?
- };
-
- // are we doing automatic environment variable expansion?
- bool m_bExpandEnvVars;
-
- // static variables
- static wxConfig *ms_pConfig;
-};
-
-#endif //_APPCONF_H
projects / wxWidgets.git / blobdiff