-/*
- 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 wxExpandEnvVars(const wxString &sz);
-
-/*
- Split path into parts removing '..' in progress
- */
-extern void wxSplitPath(wxArrayString& aParts, const char *sz);
-
-// ----------------------------------------------------------------------------
-// abstract base class wxConfigBase 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 wxConfigBase
-{
-public:
- // static functions
- // sets the config object, returns the previous pointer
- static wxConfigBase *Set(wxConfigBase *pConfig);
- // get the config object, creates it on demand unless DontCreateOnDemand
- // was called
- static wxConfigBase *Get() { if ( !ms_pConfig ) Create(); return ms_pConfig; }
- // create a new config object: this function will create the "best"
- // implementation of wxConfig available for the current platform, see
- // comments near definition wxCONFIG_WIN32_NATIVE for details. It returns
- // the created object and also sets it as ms_pConfig.
- static wxConfigBase *Create();
- // should Get() try to create a new log object if the current one is NULL?
- static void DontCreateOnDemand() { ms_bAutoCreate = FALSE; }
-
- // ctor & virtual dtor
- // environment variable expansion is on by default
- wxConfigBase() { m_bExpandEnvVars = TRUE; }
- // empty but ensures that dtor of all derived classes is virtual
- virtual ~wxConfigBase() { }
-
- // 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) const = 0;
- virtual bool GetNextGroup (wxString& str, long& lIndex) const = 0;
- // enumerate entries
- virtual bool GetFirstEntry(wxString& str, long& lIndex) const = 0;
- virtual bool GetNextEntry (wxString& str, long& lIndex) const = 0;
- // get number of entries/subgroups in the current group, with or without
- // it's subgroups
- virtual uint GetNumberOfEntries(bool bRecursive = FALSE) const = 0;
- virtual uint GetNumberOfGroups(bool bRecursive = FALSE) const = 0;
-
- // tests of existence
- // returns TRUE if the group by this name exists
- virtual bool HasGroup(const wxString& strName) const = 0;
- // same as above, but for an entry
- virtual bool HasEntry(const wxString& strName) const = 0;
- // returns TRUE if either a group or an entry with a given name exist
- bool Exists(const wxString& strName) const
- { return HasGroup(strName) || HasEntry(strName); }
-
- // 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
- virtual 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;
-
- // options
- // we can automatically expand environment variables in the config entries
- // (this option is on by default, you can turn it on/off at any time)
- bool IsExpandingEnvVars() const { return m_bExpandEnvVars; }
- void SetExpandEnvVars(bool bDoIt = TRUE) { m_bExpandEnvVars = bDoIt; }
- // does expansion only if needed
- wxString ExpandEnvVars(const wxString& str) const
- {
- wxString tmp; // Required for BC++
- if (IsExpandingEnvVars())
- tmp = wxExpandEnvVars(str);
- else
- tmp = str;
- return tmp;
- }
-
-protected:
- static bool IsImmutable(const char *szKey)
- { return *szKey == wxCONFIG_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 the function returns
- class PathChanger
- {
- public:
- // ctor/dtor do path changing/restorin
- PathChanger(const wxConfigBase *pContainer, const wxString& strEntry);
- ~PathChanger();
-
- // get the key name
- const wxString& Name() const { return m_strName; }
-
- private:
- wxConfigBase *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?
- };
-
-private:
- // are we doing automatic environment variable expansion?
- bool m_bExpandEnvVars;
-
- // static variables
- static wxConfigBase *ms_pConfig;
- static bool ms_bAutoCreate;
-};
-
-// ----------------------------------------------------------------------------
-// the native wxConfigBase implementation
-// ----------------------------------------------------------------------------
-
-// under Windows we prefer to use the native implementation
-#if defined(__WXMSW__) && wxCONFIG_WIN32_NATIVE
- #ifdef __WIN32__
projects / wxWidgets.git / blobdiff