core/DesktopEditor/fontengine/FontManager.h

/*
 * Copyright (C) Ascensio System SIA, 2009-2026
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation, together with the
 * additional terms provided in the LICENSE file.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
 * details, see the GNU AGPL at: https://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA by email at info@onlyoffice.com
 * or by postal mail at 20A-6 Ernesta Birznieka-Upisha Street, Riga,
 * LV-1050, Latvia, European Union.
 *
 * The interactive user interfaces in modified versions of the Program
 * are required to display Appropriate Legal Notices in accordance with
 * Section 5 of the GNU AGPL version 3.
 *
 * No trademark rights are granted under this License.
 *
 * All non-code elements of the Product, including illustrations,
 * icon sets, and technical writing content, are licensed under the
 * Creative Commons Attribution-ShareAlike 4.0 International License:
 * https://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
 * This license applies only to such non-code elements and does not
 * modify or replace the licensing terms applicable to the Program's
 * source code, which remains licensed under the GNU Affero General
 * Public License v3.
 *
 * SPDX-License-Identifier: AGPL-3.0-only
 */
#ifndef _BUILD_FONT_ENGINE_FONTMANAGER_H_
#define _BUILD_FONT_ENGINE_FONTMANAGER_H_

#include <map>
#include <list>
#include "FontFile.h"

class CFontStream : public NSFonts::IFontStream
{
public:
	BYTE*	m_pData;
	LONG	m_lSize;
	bool    m_bIsAttach;

public:
	CFontStream();
	virtual ~CFontStream();

public:
	virtual int CreateFromFile(const std::wstring& strFileName, BYTE* pDataUse = NULL);
	virtual int CreateFromMemory(BYTE* pData, LONG lSize, bool bClear);
	virtual void GetMemory(BYTE*& pData, LONG& lSize);
};

class CApplicationFontStreams : public NSFonts::IApplicationFontStreams
{
private:
	// this map should be periodically checked and unused streams should be removed
	std::map<std::wstring, CFontStream*> m_mapStreams;

public:
	CApplicationFontStreams();
	virtual ~CApplicationFontStreams();

public:
	NSFonts::IFontStream* GetStream(const std::wstring& strFile);
	void CheckStreams(std::map<std::wstring, bool>& mapFiles);
	void Clear();
};

class CFontsCache : public NSFonts::IFontsCache
{
	friend class CFontManager;
	friend class CApplicationFonts;
private:
	std::map<std::string, CFontFile*>	m_mapFiles;
	NSFonts::IApplicationFontStreams*	m_pApplicationFontStreams;

private:
	std::list<std::string>              m_arFiles;
	int m_lCacheSize;

	FT_Library m_pLibrary;

public:
	CFontsCache();
	virtual ~CFontsCache();
	virtual void Clear();
	virtual void SetCacheSize(const int& lMaxSize);
	FT_Library GetLibrary();

public:
	virtual void SetStreams(NSFonts::IApplicationFontStreams* pStreams) { m_pApplicationFontStreams = pStreams; }
	virtual NSFonts::IFontFile* LockFont(NSFonts::CLibrary& library, const std::wstring& strFileName, const int& lFaceIndex, const double& dSize);
};

class CApplicationFonts;
class CFontManager : public NSFonts::IFontManager
{
	friend class CApplicationFonts;

public:
	CFontFile*		m_pFont;
	CGlyphString	m_oString;

	std::wstring	m_sName;

	INT	m_bUseDefaultFont;
	double	m_fCharSpacing;
	INT	m_bStringGID;

	int m_lUnits_Per_Em;
	int m_lAscender;
	int m_lDescender;
	int m_lLineHeight;

	int m_nLOAD_MODE;
	int m_nRENDER_MODE;

	bool m_bCorrectFontByName;

	CApplicationFonts*	m_pApplication;
	CFontsCache*		m_pOwnerCache;

public:
	CFontManager();
	~CFontManager();

public:
	virtual void AfterLoad();

	virtual void Initialize();
	virtual void SetOwnerCache(NSFonts::IFontsCache* pCache);

	virtual NSFonts::IFontsCache* GetCache();
	virtual NSFonts::IApplicationFonts* GetApplication();
	virtual NSFonts::IFontFile* GetFile();

	virtual double GetCharSpacing() { return m_fCharSpacing; }
	virtual void SetCharSpacing(const double &dCharSpacing);

	virtual int GetStringGID() { return m_bStringGID; }
	virtual void SetStringGID(const int& bStringGID);

	virtual int GetUnitsPerEm() { return m_lUnits_Per_Em; }
	virtual int GetAscender() { return m_lAscender; }
	virtual int GetDescender() { return m_lDescender; }
	virtual int GetLineHeight() { return m_lLineHeight; }

	virtual std::wstring GetName() { return m_sName; }

	virtual double UpdateSize(const double& dOldSize, const double& dDpi, const double& dNewDpi);
	
	virtual INT LoadString1(const std::wstring& wsBuffer, const float& fX, const float& fY);
	virtual INT LoadString2(const std::wstring& wsBuffer, const float& fX, const float& fY);
	virtual INT LoadString1(const unsigned int* pGids, const unsigned int& nGidsCount, const float& fX, const float& fY);
	virtual INT LoadString2(const unsigned int* pGids, const unsigned int& nGidsCount, const float& fX, const float& fY);
	virtual INT LoadString3(const int& gid, const float& fX, const float& fY);
	virtual INT LoadString3C(const int& gid, const float& fX, const float& fY);
	virtual INT LoadString2C(const int& wsBuffer, const float& fX, const float& fY);

	virtual int GetKerning(UINT unPrevGID, UINT unGID);
	virtual int GetUnderline(float *pfStartX, float *pfStartY, float *pfEndX, float *pfEndY, float *pfSize);

	virtual TFontCacheSizes MeasureChar(const LONG& lUnicode);

	virtual TBBoxAdvance MeasureChar2(const LONG& lUnicode);
	virtual TBBox MeasureString();
	virtual TBBox MeasureString2();
	
	virtual INT GetNextChar2(TGlyph*& pGlyph, float& fX, float& fY);

	virtual INT SetTextMatrix(const double& fA, const double& fB, const double& fC, const double& fD, const double& fE, const double& fF);
	virtual INT SetTextMatrix2(const double& fA, const double& fB, const double& fC, const double& fD, const double& fE, const double& fF);

	virtual INT GetStringPath(NSFonts::ISimpleGraphicsPath* pPath);

	virtual NSFonts::CFontInfo* GetFontInfoByParams(NSFonts::CFontSelectFormat& oFormat, bool bIsDictionaryUse = true);
	virtual std::vector<NSFonts::CFontInfo*> GetAllStylesByFontName(const std::wstring& strName);
	virtual INT LoadFontByName(const std::wstring& sName, const double& dSize, const int& lStyle, const double& dDpiX, const double& dDpiY);
	virtual INT LoadFontFromFile(const std::wstring& sPath, const int& lFaceIndex, const double& dSize, const double& dDpiX, const double& dDpiY);
	virtual INT LoadFontFromFile2(NSFonts::IFontsCache* pCache, const std::wstring& sPath, const int& lFaceIndex, const double& dSize, const double& dDpiX, const double& dDpiY);
	virtual void CloseFont();

	virtual std::wstring GetFontType();
	virtual unsigned int GetNameIndex(const std::wstring& wsName);
	virtual unsigned int GetGIDByUnicode(const unsigned int& unCode);
	virtual int GetUnicodeByGID(const int& gid);

	virtual void SetSubpixelRendering(const bool& hmul, const bool& vmul);

	virtual void GetFace(double& d0, double& d1, double& d2);
	virtual void GetLimitsY(double& dMin, double& dMax);

	virtual void SetUseCorrentFontByName(const bool& use);

	CFontFile* GetFontFileBySymbol(CFontFile* pFile, int code);
};

#endif // _BUILD_FONT_ENGINE_FONTMANAGER_H_