/////////////////////////////////////////////////////////////////////////////// // Name: wx/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 Ballueder & Vadim Zeitlin // Modified by: // Created: 07.04.98 (adapted from appconf.h) // Copyright: (c) 1997 Karsten Ballueder Ballueder@usa.net // Vadim Zeitlin // Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// #ifndef _WX_CONFBASE_H_ #define _WX_CONFBASE_H_ #include "wx/defs.h" #include "wx/string.h" #include "wx/object.h" #include "wx/base64.h" class WXDLLIMPEXP_FWD_BASE wxArrayString; // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- /// shall we be case sensitive in parsing variable names? #ifndef wxCONFIG_CASE_SENSITIVE #define wxCONFIG_CASE_SENSITIVE 0 #endif /// separates group and entry names (probably shouldn't be changed) #ifndef wxCONFIG_PATH_SEPARATOR #define wxCONFIG_PATH_SEPARATOR wxT('/') #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 wxT('!') #endif #if wxUSE_CONFIG /// should we use registry instead of configuration files under Windows? // (i.e. whether wxConfigBase::Create() will create a wxFileConfig (if it's // false) or wxRegConfig (if it's true and we're under Win32)) #ifndef wxUSE_CONFIG_NATIVE #define wxUSE_CONFIG_NATIVE 1 #endif // not all compilers can deal with template Read/Write() methods, define this // symbol if the template functions are available #if !defined( __VMS ) && \ !(defined(__HP_aCC) && defined(__hppa)) #define wxHAS_CONFIG_TEMPLATE_RW #endif // Style flags for constructor style parameter enum { wxCONFIG_USE_LOCAL_FILE = 1, wxCONFIG_USE_GLOBAL_FILE = 2, wxCONFIG_USE_RELATIVE_PATH = 4, wxCONFIG_USE_NO_ESCAPE_CHARACTERS = 8, wxCONFIG_USE_SUBDIR = 16 }; // ---------------------------------------------------------------------------- // abstract base class wxConfigBase which defines the interface for derived // classes // // wxConfig organizes the items in a tree-like structure (modelled 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 WXDLLIMPEXP_BASE wxConfigBase : public wxObject { 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(bool createOnDemand = true) { if ( createOnDemand && (!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 wxUSE_CONFIG_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 bool Read(const wxString& key, wxString *pStr) const; bool Read(const wxString& key, wxString *pStr, const wxString& defVal) const; // read a number (long) bool Read(const wxString& key, long *pl) const; bool Read(const wxString& key, long *pl, long defVal) const; // read an int (wrapper around `long' version) bool Read(const wxString& key, int *pi) const; bool Read(const wxString& key, int *pi, int defVal) const; // read a double bool Read(const wxString& key, double* val) const; bool Read(const wxString& key, double* val, double defVal) const; // read a float bool Read(const wxString& key, float* val) const; bool Read(const wxString& key, float* val, float defVal) const; // read a bool bool Read(const wxString& key, bool* val) const; bool Read(const wxString& key, bool* val, bool defVal) const; #if wxUSE_BASE64 // read a binary data block bool Read(const wxString& key, wxMemoryBuffer* data) const { return DoReadBinary(key, data); } // no default version since it does not make sense for binary data #endif // wxUSE_BASE64 #ifdef wxHAS_CONFIG_TEMPLATE_RW // read other types, for which wxFromString is defined template bool Read(const wxString& key, T* value) const { wxString s; if ( !Read(key, &s) ) return false; return wxFromString(s, value); } template bool Read(const wxString& key, T* value, const T& defVal) const { const bool found = Read(key, value); if ( !found ) { if (IsRecordingDefaults()) ((wxConfigBase *)this)->Write(key, defVal); *value = defVal; } return found; } #endif // wxHAS_CONFIG_TEMPLATE_RW // convenience functions returning directly the value wxString Read(const wxString& key, const wxString& defVal = wxEmptyString) const { wxString s; (void)Read(key, &s, defVal); return s; } // we have to provide a separate version for C strings as otherwise the // template Read() would be used wxString Read(const wxString& key, const char* defVal) const { return Read(key, wxString(defVal)); } wxString Read(const wxString& key, const wchar_t* defVal) const { return Read(key, wxString(defVal)); } long ReadLong(const wxString& key, long defVal) const { long l; (void)Read(key, &l, defVal); return l; } double ReadDouble(const wxString& key, double defVal) const { double d; (void)Read(key, &d, defVal); return d; } bool ReadBool(const wxString& key, bool defVal) const { bool b; (void)Read(key, &b, defVal); return b; } template T ReadObject(const wxString& key, T const& defVal) const { T t; (void)Read(key, &t, defVal); return t; } // for compatibility with wx 2.8 long Read(const wxString& key, long defVal) const { return ReadLong(key, defVal); } // write the value (return true on success) bool Write(const wxString& key, const wxString& value) { return DoWriteString(key, value); } bool Write(const wxString& key, long value) { return DoWriteLong(key, value); } bool Write(const wxString& key, double value) { return DoWriteDouble(key, value); } bool Write(const wxString& key, bool value) { return DoWriteBool(key, value); } #if wxUSE_BASE64 bool Write(const wxString& key, const wxMemoryBuffer& buf) { return DoWriteBinary(key, buf); } #endif // wxUSE_BASE64 // we have to provide a separate version for C strings as otherwise they // would be converted to bool and not to wxString as expected! bool Write(const wxString& key, const char *value) { return Write(key, wxString(value)); } bool Write(const wxString& key, const unsigned char *value) { return Write(key, wxString(value)); } bool Write(const wxString& key, const wchar_t *value) { return Write(key, wxString(value)); } // we also have to provide specializations for other types which we want to // handle using the specialized DoWriteXXX() instead of the generic template // version below bool Write(const wxString& key, char value) { return DoWriteLong(key, value); } bool Write(const wxString& key, unsigned char value) { return DoWriteLong(key, value); } bool Write(const wxString& key, short value) { return DoWriteLong(key, value); } bool Write(const wxString& key, unsigned short value) { return DoWriteLong(key, value); } bool Write(const wxString& key, unsigned int value) { return DoWriteLong(key, value); } bool Write(const wxString& key, int value) { return DoWriteLong(key, value); } bool Write(const wxString& key, unsigned long value) { return DoWriteLong(key, value); } bool Write(const wxString& key, float value) { return DoWriteDouble(key, value); } // Causes ambiguities in under OpenVMS #if !defined( __VMS ) // for other types, use wxToString() template bool Write(const wxString& key, T const& value) { return Write(key, wxToString(value)); } #endif // 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, ...) // primarily for use by uninstallation 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; } // Used wxIniConfig to set members in constructor void SetAppName(const wxString& appName) { m_appName = appName; } void SetVendorName(const wxString& vendorName) { m_vendorName = 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; } // return the path without trailing separator, if any: this should be called // to sanitize paths referring to the group names before passing them to // wxConfigPathChanger as "/foo/bar/" should be the same as "/foo/bar" and it // isn't interpreted in the same way by it (and this can't be changed there // as it's not the same for the entries names) static wxString RemoveTrailingSeparator(const wxString& key); // do read/write the values of different types virtual bool DoReadString(const wxString& key, wxString *pStr) const = 0; virtual bool DoReadLong(const wxString& key, long *pl) const = 0; virtual bool DoReadDouble(const wxString& key, double* val) const; virtual bool DoReadBool(const wxString& key, bool* val) const; #if wxUSE_BASE64 virtual bool DoReadBinary(const wxString& key, wxMemoryBuffer* buf) const = 0; #endif // wxUSE_BASE64 virtual bool DoWriteString(const wxString& key, const wxString& value) = 0; virtual bool DoWriteLong(const wxString& key, long value) = 0; virtual bool DoWriteDouble(const wxString& key, double value); virtual bool DoWriteBool(const wxString& key, bool value); #if wxUSE_BASE64 virtual bool DoWriteBinary(const wxString& key, const wxMemoryBuffer& buf) = 0; #endif // wxUSE_BASE64 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; wxDECLARE_ABSTRACT_CLASS(wxConfigBase); }; // 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 WXDLLIMPEXP_BASE wxConfigPathChanger { public: // ctor/dtor do path changing/restoring of the path wxConfigPathChanger(const wxConfigBase *pContainer, const wxString& strEntry); ~wxConfigPathChanger(); // get the key name const wxString& Name() const { return m_strName; } // this method must be called if the original path (i.e. the current path at // the moment of creation of this object) could have been deleted to prevent // us from restoring the not existing (any more) path // // if the original path doesn't exist any more, the path will be restored to // the deepest still existing component of the old path void UpdateIfDeleted(); 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? wxDECLARE_NO_COPY_CLASS(wxConfigPathChanger); }; #endif // 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. */ WXDLLIMPEXP_BASE wxString wxExpandEnvVars(const wxString &sz); /* Split path into parts removing '..' in progress */ WXDLLIMPEXP_BASE void wxSplitPath(wxArrayString& aParts, const wxString& path); #endif // _WX_CONFBASE_H_