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CodeBlocksPortable/wxWidgets-3.0.5/include/wx/fontmap.h

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/////////////////////////////////////////////////////////////////////////////
// Name: wx/fontmap.h
// Purpose: wxFontMapper class
// Author: Vadim Zeitlin
// Modified by:
// Created: 04.11.99
// Copyright: (c) Vadim Zeitlin
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_FONTMAPPER_H_
#define _WX_FONTMAPPER_H_
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#if wxUSE_FONTMAP
#include "wx/fontenc.h" // for wxFontEncoding
#if wxUSE_GUI
#include "wx/fontutil.h" // for wxNativeEncodingInfo
#endif // wxUSE_GUI
#if wxUSE_CONFIG && wxUSE_FILECONFIG
class WXDLLIMPEXP_FWD_BASE wxConfigBase;
#endif // wxUSE_CONFIG
class WXDLLIMPEXP_FWD_CORE wxFontMapper;
#if wxUSE_GUI
class WXDLLIMPEXP_FWD_CORE wxWindow;
#endif // wxUSE_GUI
// ============================================================================
// wxFontMapper manages user-definable correspondence between wxWidgets font
// encodings and the fonts present on the machine.
//
// This is a singleton class, font mapper objects can only be accessed using
// wxFontMapper::Get().
// ============================================================================
// ----------------------------------------------------------------------------
// wxFontMapperBase: this is a non-interactive class which just uses its built
// in knowledge of the encodings equivalence
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxFontMapperBase
{
public:
// constructor and such
// ---------------------
// default ctor
wxFontMapperBase();
// virtual dtor for any base class
virtual ~wxFontMapperBase();
// return instance of the wxFontMapper singleton
// wxBase code only cares that it's a wxFontMapperBase
// In wxBase, wxFontMapper is only forward declared
// so one cannot implicitly cast from it to wxFontMapperBase.
static wxFontMapperBase *Get();
// set the singleton to 'mapper' instance and return previous one
static wxFontMapper *Set(wxFontMapper *mapper);
// delete the existing font mapper if any
static void Reset();
// translates charset strings to encoding
// --------------------------------------
// returns the encoding for the given charset (in the form of RFC 2046) or
// wxFONTENCODING_SYSTEM if couldn't decode it
//
// interactive parameter is ignored in the base class, we behave as if it
// were always false
virtual wxFontEncoding CharsetToEncoding(const wxString& charset,
bool interactive = true);
// information about supported encodings
// -------------------------------------
// get the number of font encodings we know about
static size_t GetSupportedEncodingsCount();
// get the n-th supported encoding
static wxFontEncoding GetEncoding(size_t n);
// return canonical name of this encoding (this is a short string,
// GetEncodingDescription() returns a longer one)
static wxString GetEncodingName(wxFontEncoding encoding);
// return a list of all names of this encoding (see GetEncodingName)
static const wxChar** GetAllEncodingNames(wxFontEncoding encoding);
// return user-readable string describing the given encoding
//
// NB: hard-coded now, but might change later (read it from config?)
static wxString GetEncodingDescription(wxFontEncoding encoding);
// find the encoding corresponding to the given name, inverse of
// GetEncodingName() and less general than CharsetToEncoding()
//
// returns wxFONTENCODING_MAX if the name is not a supported encoding
static wxFontEncoding GetEncodingFromName(const wxString& name);
// functions which allow to configure the config object used: by default,
// the global one (from wxConfigBase::Get() will be used) and the default
// root path for the config settings is the string returned by
// GetDefaultConfigPath()
// ----------------------------------------------------------------------
#if wxUSE_CONFIG && wxUSE_FILECONFIG
// set the root config path to use (should be an absolute path)
void SetConfigPath(const wxString& prefix);
// return default config path
static const wxString& GetDefaultConfigPath();
#endif // wxUSE_CONFIG
// returns true for the base class and false for a "real" font mapper object
// (implementation-only)
virtual bool IsDummy() { return true; }
protected:
#if wxUSE_CONFIG && wxUSE_FILECONFIG
// get the config object we're using -- either the global config object
// or a wxMemoryConfig object created by this class otherwise
wxConfigBase *GetConfig();
// gets the root path for our settings -- if it wasn't set explicitly, use
// GetDefaultConfigPath()
const wxString& GetConfigPath();
// change to the given (relative) path in the config, return true if ok
// (then GetConfig() will return something !NULL), false if no config
// object
//
// caller should provide a pointer to the string variable which should be
// later passed to RestorePath()
bool ChangePath(const wxString& pathNew, wxString *pathOld);
// restore the config path after use
void RestorePath(const wxString& pathOld);
// config object and path (in it) to use
wxConfigBase *m_configDummy;
wxString m_configRootPath;
#endif // wxUSE_CONFIG
// the real implementation of the base class version of CharsetToEncoding()
//
// returns wxFONTENCODING_UNKNOWN if encoding is unknown and we shouldn't
// ask the user about it, wxFONTENCODING_SYSTEM if it is unknown but we
// should/could ask the user
int NonInteractiveCharsetToEncoding(const wxString& charset);
private:
// the global fontmapper object or NULL
static wxFontMapper *sm_instance;
friend class wxFontMapperPathChanger;
wxDECLARE_NO_COPY_CLASS(wxFontMapperBase);
};
// ----------------------------------------------------------------------------
// wxFontMapper: interactive extension of wxFontMapperBase
//
// The default implementations of all functions will ask the user if they are
// not capable of finding the answer themselves and store the answer in a
// config file (configurable via SetConfigXXX functions). This behaviour may
// be disabled by giving the value of false to "interactive" parameter.
// However, the functions will always consult the config file to allow the
// user-defined values override the default logic and there is no way to
// disable this -- which shouldn't be ever needed because if "interactive" was
// never true, the config file is never created anyhow.
// ----------------------------------------------------------------------------
#if wxUSE_GUI
class WXDLLIMPEXP_CORE wxFontMapper : public wxFontMapperBase
{
public:
// default ctor
wxFontMapper();
// virtual dtor for a base class
virtual ~wxFontMapper();
// working with the encodings
// --------------------------
// returns the encoding for the given charset (in the form of RFC 2046) or
// wxFONTENCODING_SYSTEM if couldn't decode it
virtual wxFontEncoding CharsetToEncoding(const wxString& charset,
bool interactive = true);
// find an alternative for the given encoding (which is supposed to not be
// available on this system). If successful, return true and fill info
// structure with the parameters required to create the font, otherwise
// return false
virtual bool GetAltForEncoding(wxFontEncoding encoding,
wxNativeEncodingInfo *info,
const wxString& facename = wxEmptyString,
bool interactive = true);
// version better suitable for 'public' use. Returns wxFontEcoding
// that can be used it wxFont ctor
bool GetAltForEncoding(wxFontEncoding encoding,
wxFontEncoding *alt_encoding,
const wxString& facename = wxEmptyString,
bool interactive = true);
// checks whether given encoding is available in given face or not.
//
// if no facename is given (default), return true if it's available in any
// facename at alll.
virtual bool IsEncodingAvailable(wxFontEncoding encoding,
const wxString& facename = wxEmptyString);
// configure the appearance of the dialogs we may popup
// ----------------------------------------------------
// the parent window for modal dialogs
void SetDialogParent(wxWindow *parent) { m_windowParent = parent; }
// the title for the dialogs (note that default is quite reasonable)
void SetDialogTitle(const wxString& title) { m_titleDialog = title; }
// GUI code needs to know it's a wxFontMapper because there
// are additional methods in the subclass.
static wxFontMapper *Get();
// pseudo-RTTI since we aren't a wxObject.
virtual bool IsDummy() { return false; }
protected:
// GetAltForEncoding() helper: tests for the existence of the given
// encoding and saves the result in config if ok - this results in the
// following (desired) behaviour: when an unknown/unavailable encoding is
// requested for the first time, the user is asked about a replacement,
// but if he doesn't choose any and the default logic finds one, it will
// be saved in the config so that the user won't be asked about it any
// more
bool TestAltEncoding(const wxString& configEntry,
wxFontEncoding encReplacement,
wxNativeEncodingInfo *info);
// the title for our dialogs
wxString m_titleDialog;
// the parent window for our dialogs
wxWindow *m_windowParent;
private:
wxDECLARE_NO_COPY_CLASS(wxFontMapper);
};
#endif // wxUSE_GUI
// ----------------------------------------------------------------------------
// global variables
// ----------------------------------------------------------------------------
// the default font mapper for wxWidgets programs do NOT use! This is for
// backward compatibility, use wxFontMapper::Get() instead
#define wxTheFontMapper (wxFontMapper::Get())
#else // !wxUSE_FONTMAP
#if wxUSE_GUI
// wxEncodingToCodepage (utils.cpp) needs wxGetNativeFontEncoding
#include "wx/fontutil.h"
#endif
#endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
#endif // _WX_FONTMAPPER_H_