/////////////////////////////////////////////////////////////////////////////// // Name: confbase.h // Purpose: declaration of the base class of all config implementations // (see also: fileconf.h and msw/regconf.h and iniconf.h) // Author: Karsten Ballüder & Vadim Zeitlin // Modified by: // Created: 07.04.98 (adapted from appconf.h) // RCS-ID: $Id$ // Copyright: (c) 1997 Karsten Ballüder Ballueder@usa.net // Vadim Zeitlin // Licence: wxWindows license /////////////////////////////////////////////////////////////////////////////// #ifndef _WX_CONFBASE_H_ #define _WX_CONFBASE_H_ #ifdef __GNUG__ #pragma interface "confbase.h" #endif #include "wx/defs.h" #if wxUSE_CONFIG #include "wx/string.h" // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- /// shall we be case sensitive in parsing variable names? #ifndef wxCONFIG_CASE_SENSITIVE #define wxCONFIG_CASE_SENSITIVE FALSE #endif /// separates group and entry names (probably shouldn't be changed) #ifndef wxCONFIG_PATH_SEPARATOR #define wxCONFIG_PATH_SEPARATOR '/' #endif /// introduces immutable entries // (i.e. the ones which can't be changed from the local config file) #ifndef wxCONFIG_IMMUTABLE_PREFIX #define wxCONFIG_IMMUTABLE_PREFIX '!' #endif /// should we use registry instead of configuration files under Win32? // (i.e. whether wxConfigBase::Create() will create a wxFileConfig (if it's // FALSE) or wxRegConfig (if it's true and we're under Win32) or wxIniConfig // (under Win16)) #ifndef wxCONFIG_WIN32_NATIVE #define wxCONFIG_WIN32_NATIVE TRUE #endif // Style flags for constructor style parameter enum { wxCONFIG_USE_LOCAL_FILE = 1, wxCONFIG_USE_GLOBAL_FILE = 2, wxCONFIG_USE_RELATIVE_PATH = 4 }; // ---------------------------------------------------------------------------- // 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 (TODO doubles and other types such as wxDate coming soon). // ---------------------------------------------------------------------------- class WXDLLEXPORT wxConfigBase { public: // constants // the type of an entry enum EntryType { Type_Unknown, Type_String, Type_Boolean, Type_Integer, // use Read(long *) Type_Float // use Read(double *) }; // 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 // ctor (can be used as default ctor too) // // Not all args will always be used by derived classes, but including // them all in each class ensures compatibility. If appName is empty, // uses wxApp name wxConfigBase(const wxString& appName = wxEmptyString, const wxString& vendorName = wxEmptyString, const wxString& localFilename = wxEmptyString, const wxString& globalFilename = wxEmptyString, long style = 0); // 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 size_t GetNumberOfEntries(bool bRecursive = FALSE) const = 0; virtual size_t 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); } // get the entry type virtual EntryType GetEntryType(const wxString& name) const { // by default all entries are strings return HasEntry(name) ? Type_String : Type_Unknown; } // 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(const wxString& key, wxString *pStr) const = 0; virtual bool Read(const wxString& key, wxString *pStr, const wxString& defVal) const; virtual wxString Read(const wxString& key, const wxString& defVal = wxEmptyString) const; virtual bool Read(const wxString& key, long *pl) const = 0; virtual bool Read(const wxString& key, long *pl, long defVal) const; virtual long Read(const wxString& strKey, long defVal) const { long l; Read(strKey, &l, defVal); return l; } // Convenience functions that are built on other forms // int virtual bool Read(const wxString& key, int *pi) const; virtual bool Read(const wxString& key, int *pi, int defVal) const; // double virtual bool Read(const wxString& key, double* val) const; virtual bool Read(const wxString& key, double* val, double defVal) const; // bool virtual bool Read(const wxString& key, bool* val) const; virtual bool Read(const wxString& key, bool* val, bool defVal) const; // write the value (return true on success) virtual bool Write(const wxString& key, const wxString& value) = 0; virtual bool Write(const wxString& key, long value) = 0; // Convenience functions virtual bool Write(const wxString& key, double value); virtual bool Write(const wxString& key, bool value); // permanently writes all changes virtual bool Flush(bool bCurrentOnly = FALSE) = 0; // renaming, all functions return FALSE on failure (probably because the new // name is already taken by an existing entry) // rename an entry virtual bool RenameEntry(const wxString& oldName, const wxString& newName) = 0; // rename a group virtual bool RenameGroup(const wxString& oldName, const wxString& newName) = 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 wxString& key, bool bDeleteGroupIfEmpty = TRUE) = 0; // delete the group (with all subgroups) virtual bool DeleteGroup(const wxString& key) = 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; } // recording of default values void SetRecordDefaults(bool bDoIt = TRUE) { m_bRecordDefaults = bDoIt; } bool IsRecordingDefaults() const { return m_bRecordDefaults; } // does expansion only if needed wxString ExpandEnvVars(const wxString& str) const; // misc accessors wxString GetAppName() const { return m_appName; } wxString GetVendorName() const { return m_vendorName; } void SetStyle(long style) { m_style = style; } long GetStyle() const { return m_style; } protected: static bool IsImmutable(const wxString& key) { return !key.IsEmpty() && key[0] == wxCONFIG_IMMUTABLE_PREFIX; } private: // are we doing automatic environment variable expansion? bool m_bExpandEnvVars; // do we record default values? bool m_bRecordDefaults; // static variables static wxConfigBase *ms_pConfig; static bool ms_bAutoCreate; // Application name and organisation name wxString m_appName; wxString m_vendorName; // Style flag long m_style; }; // 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 // Taken out of wxConfig since not all compilers can cope with nested classes. class wxConfigPathChanger { public: // ctor/dtor do path changing/restorin wxConfigPathChanger(const wxConfigBase *pContainer, const wxString& strEntry); ~wxConfigPathChanger(); // 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? }; // ---------------------------------------------------------------------------- // the native wxConfigBase implementation // ---------------------------------------------------------------------------- // under Windows we prefer to use the native implementation #if defined(__WXMSW__) && wxCONFIG_WIN32_NATIVE #ifdef __WIN32__ #define wxConfig wxRegConfig #define sm_classwxConfig sm_classwxRegConfig #else //WIN16 #define wxConfig wxIniConfig #define sm_classwxConfig sm_classwxIniConfig #endif #else // either we're under Unix or wish to use files even under Windows #define wxConfig wxFileConfig #define sm_classwxConfig sm_classwxFileConfig #endif #endif // wxUSE_CONFIG // ---------------------------------------------------------------------------- // various helper global functions (defined even if !wxUSE_CONFIG) // ---------------------------------------------------------------------------- /* 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 wxChar *sz); #endif // _WX_CONFIG_H_