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| -rw-r--r-- | include/vcl/fontcharmap.hxx | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/include/vcl/fontcharmap.hxx b/include/vcl/fontcharmap.hxx new file mode 100644 index 000000000..2a4e1dd08 --- /dev/null +++ b/include/vcl/fontcharmap.hxx @@ -0,0 +1,168 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_FONTCHARMAP_HXX +#define INCLUDED_FONTCHARMAP_HXX + +#include <vcl/dllapi.h> +#include <tools/ref.hxx> + +class ImplFontCharMap; +class CmapResult; +class FontCharMap; +class OutputDevice; + +typedef sal_uInt32 sal_UCS4; +typedef tools::SvRef<ImplFontCharMap> ImplFontCharMapRef; +typedef tools::SvRef<FontCharMap> FontCharMapRef; + +class VCL_DLLPUBLIC FontCharMap : public SvRefBase +{ +public: + /** A new FontCharMap is created based on a "default" map, which includes + all codepoints in the Unicode BMP range, including surrogates. + **/ + FontCharMap(); + FontCharMap( const CmapResult& rCR ); + virtual ~FontCharMap() override; + + /** Get the default font character map + + @returns the default font character map. + */ + static FontCharMapRef GetDefaultMap( bool bSymbols ); + + /** Determines if the font character map is the "default". The default map + includes all codepoints in the Unicode BMP range, including surrogates. + + @returns true if default map, false if not default map. + */ + bool IsDefaultMap() const; + + /** Does the font character map include the UCS4 character? + + @returns true if character exists in font character map, false is not. + */ + bool HasChar( sal_UCS4 ) const; + + /** Returns the number of chars supported by the font, which + are inside the unicode range from cMin to cMax (inclusive). + + @param cMin Lowest codepoint in range to be counted + @param cMax Highest codepoint in range to be counted + + @returns number of characters in the font charmap between the two + codepoints. + */ + int CountCharsInRange( sal_UCS4 cMin, sal_UCS4 cMax ) const; + + /** Get the number of characters in the font character map. + + @returns number of characters in the font character map. + */ + int GetCharCount() const; + + /** Get the first character in the font character map. + + @returns first character in the font character map. + */ + sal_UCS4 GetFirstChar() const; + + /** Get the last character in the font character map. + + @returns last character in the font character map. + */ + sal_UCS4 GetLastChar() const; + + /** Get the next character in the font character map. This is important + because character maps (e.g. the default map which holds the characters + in the BMP plane) can have discontiguous ranges. + + @param cChar Character from which to find next character + + @returns next character in the font character map. + */ + sal_UCS4 GetNextChar( sal_UCS4 cChar ) const; + + /** Get the previous character in the font character map. This is important + because character maps (e.g. the default map which holds the characters + in the BMP plane) can have discontiguous ranges. + + @param cChar Character from which to find previous character + + @returns previous character in the font character map. + */ + sal_UCS4 GetPrevChar( sal_UCS4 cChar ) const; + + /** Get the index of a particular character in the font character map. The + index is different from the codepoint, because font character maps can + + determine the index. + + @param cChar Character used to find index number + + @returns Index of character in font character map. + */ + int GetIndexFromChar( sal_UCS4 cChar ) const; + + /** Get the character at a particular index in the font character map. The + index is different from the codepoint, because font character maps can + + determine the character. + + @param nCharIndex Index used to find the character + + @returns Character in font character map. + */ + sal_UCS4 GetCharFromIndex( int nCharIndex ) const; + + int GetGlyphIndex( sal_UCS4 ) const; + +private: + ImplFontCharMapRef mpImplFontCharMap; + + friend class ::OutputDevice; + + int findRangeIndex( sal_UCS4 ) const; + + FontCharMap( ImplFontCharMapRef const & pIFCMap ); + + // prevent assignment and copy construction + FontCharMap( const FontCharMap& ) = delete; + void operator=( const FontCharMap& ) = delete; +}; + +// CmapResult is a normalized version of the many CMAP formats +class VCL_PLUGIN_PUBLIC CmapResult +{ +public: + explicit CmapResult( bool bSymbolic = false, + const sal_UCS4* pRangeCodes = nullptr, int nRangeCount = 0 ); + + const sal_UCS4* mpRangeCodes; + const int* mpStartGlyphs; + const sal_uInt16* mpGlyphIds; + int mnRangeCount; + bool mbSymbolic; + bool mbRecoded; +}; + +#endif // INCLUDED_FONTCHARMAP_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |