vcl/inc/fontcache.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_VCL_INC_FONTCACHE_HXX
  21 #define INCLUDED_VCL_INC_FONTCACHE_HXX
  22
  23 #include <rtl/ustring.hxx>
  24 #include <vcl/dllapi.h>
  25 #include <unordered_map>
  26
  27 #include "fontmanager.hxx"
  28
  29 namespace psp
  30 {
  31
  32 class VCL_PLUGIN_PUBLIC FontCache
  33 {
  34     struct FontDir;
  35     friend struct FontDir;
  36     struct FontFile;
  37     friend struct FontFile;
  38
  39     typedef std::list< PrintFontManager::PrintFont* > FontCacheEntry;
  40     struct FontFile
  41     {
  42         FontCacheEntry      m_aEntry;
  43     };
  44
  45     typedef std::unordered_map< OString, FontFile, OStringHash > FontDirMap;
  46     struct FontDir
  47     {
  48         sal_Int64   m_nTimestamp;
  49         bool        m_bNoFiles;
  50         bool        m_bUserOverrideOnly;
  51         FontDirMap  m_aEntries;
  52
  53         FontDir() : m_nTimestamp(0), m_bNoFiles(false), m_bUserOverrideOnly( false ) {}
  54     };
  55
  56     typedef std::unordered_map< int, FontDir > FontCacheData;
  57     FontCacheData   m_aCache;
  58     OUString        m_aCacheFile;
  59     bool            m_bDoFlush;
  60
  61     void read();
  62     void clearCache();
  63
  64     static void copyPrintFont( const PrintFontManager::PrintFont* pFrom, PrintFontManager::PrintFont* pTo );
  65     static bool equalsPrintFont( const PrintFontManager::PrintFont* pLeft, PrintFontManager::PrintFont* pRight );
  66     static PrintFontManager::PrintFont* clonePrintFont( const PrintFontManager::PrintFont* pFont );
  67
  68     void createCacheDir( int nDirID );
  69 public:
  70     FontCache();
  71     ~FontCache();
  72
  73     bool getFontCacheFile( int nDirID, const OString& rFile, std::list< PrintFontManager::PrintFont* >& rNewFonts ) const;
  74     void updateFontCacheEntry( const PrintFontManager::PrintFont*, bool bFlush );
  75
  76     // returns false for non cached directory
  77     // a cached but empty directory will return true but not append anything
  78     bool listDirectory( const OString& rDir, std::list< PrintFontManager::PrintFont* >& rNewFonts ) const;
  79     // returns true for directoris that contain only user overridden fonts
  80     bool scanAdditionalFiles( const OString& rDir );
  81
  82     void flush();
  83 };
  84
  85 } // namespace psp
  86
  87 #endif // INCLUDED_VCL_INC_FONTCACHE_HXX
  88
  89 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */