haiku-beta6/headers/private/servers/app/FontManager.h

/*
 * Copyright 2001-2005, Haiku.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		DarkWyrm <[email protected]>
 *		Axel Dörfler, [email protected]
 */
#ifndef FONT_MANAGER_H
#define FONT_MANAGER_H


#include "HashTable.h"

#include <Looper.h>
#include <ObjectList.h>

#include <ft2build.h>
#include FT_FREETYPE_H

class BPath;

class FontFamily;
class FontStyle;
class ServerFont;


/*!
	\class FontManager FontManager.h
	\brief Manager for the largest part of the font subsystem
*/
class FontManager : public BLooper {
	public:
		FontManager();
		virtual ~FontManager();

		status_t InitCheck() { return fInitStatus; }
		void SaveRecentFontMappings();

		virtual void MessageReceived(BMessage* message);

		int32 CheckRevision(uid_t user);
		int32 CountFamilies();

		int32 CountStyles(const char *family);
		FontFamily* FamilyAt(int32 index) const;

		FontFamily *GetFamily(uint16 familyID) const;
		FontFamily *GetFamily(const char *name);

		FontStyle *GetStyleByIndex(const char *family, int32 index);
		FontStyle *GetStyle(const char *family, const char *style, uint16 familyID = 0xffff,
						uint16 styleID = 0xffff, uint16 face = 0);
		FontStyle *GetStyle(const char *family, uint16 styleID);
		FontStyle *GetStyle(uint16 familyID, uint16 styleID) const;
		FontStyle* FindStyleMatchingFace(uint16 face) const;

		void RemoveStyle(FontStyle* style);
			// this call must not be used by anything else than class FontStyle

		const ServerFont* DefaultPlainFont() const;
		const ServerFont* DefaultBoldFont() const;
		const ServerFont* DefaultFixedFont() const;

		void AttachUser(uid_t userID);
		void DetachUser(uid_t userID);

	private:
		struct font_directory;
		struct font_mapping;

		bool _LoadRecentFontMappings();
		FontStyle* _GetDefaultStyle(const char *familyName, const char *styleName,
						const char *fallbackFamily, const char *fallbackStyle,
						uint16 fallbackFace);
		status_t _SetDefaultFonts();
		void _AddSystemPaths();
		font_directory* _FindDirectory(node_ref& nodeRef);
		void _RemoveDirectory(font_directory* directory);
		status_t _AddPath(const char* path);
		status_t _AddPath(BEntry& entry, font_directory** _newDirectory = NULL);

		void _RemoveStyle(font_directory& directory, FontStyle* style);
		void _RemoveStyle(dev_t device, uint64 directory, uint64 node);
		FontFamily* _FindFamily(const char* family) const;

		void _ScanFontsIfNecessary();
		void _ScanFonts();
		status_t _ScanFontDirectory(font_directory& directory);
		status_t _AddFont(font_directory& directory, BEntry& entry);

		FT_CharMap _GetSupportedCharmap(const FT_Face &face);

	private:
		status_t	fInitStatus;
		BObjectList<font_directory> fDirectories;
		BObjectList<font_mapping> fMappings;
		BObjectList<FontFamily> fFamilies;
		HashTable	fStyleHashTable;
		ServerFont*	fDefaultPlainFont;
		ServerFont*	fDefaultBoldFont;
		ServerFont*	fDefaultFixedFont;
		bool		fScanned;
		int32		fNextID;
};

extern FT_Library gFreeTypeLibrary;
extern FontManager *gFontManager;

#endif	/* FONT_MANAGER_H */