| /************************************************************** |
| * |
| * 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 |
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| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
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| * KIND, either express or implied. See the License for the |
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| *************************************************************/ |
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| |
| |
| #ifndef _SV_GRAPHITETEXTSRC_HXX |
| #define _SV_GRAPHITETEXTSRC_HXX |
| // Description: Implements the Graphite interfaces IGrTextSource and |
| // IGrGraphics which provide Graphite with access to the |
| // app's text storage system and the platform's font and |
| // graphics systems. |
| |
| // We need this to enable namespace support in libgrengine headers. |
| #define GR_NAMESPACE |
| |
| // Standard Library |
| #include <stdexcept> |
| // Platform |
| |
| #ifndef _SVWIN_H |
| #include <tools/svwin.h> |
| #endif |
| |
| #include <svsys.h> |
| #include <salgdi.hxx> |
| #include <sallayout.hxx> |
| |
| // Module |
| #include "vcl/dllapi.h" |
| |
| // Libraries |
| #include <preextstl.h> |
| #include <graphite/GrClient.h> |
| #include <graphite/Font.h> |
| #include <graphite/ITextSource.h> |
| #include <postextstl.h> |
| |
| // Module type definitions and forward declarations. |
| // |
| namespace grutils |
| { |
| class GrFeatureParser; |
| } |
| // Implements the Adaptor pattern to adapt the LayoutArgs and the ServerFont interfaces to the |
| // gr::IGrTextSource interface. |
| // @author tse |
| // |
| class TextSourceAdaptor : public gr::ITextSource |
| { |
| public: |
| TextSourceAdaptor(ImplLayoutArgs &layout_args, const int nContextLen) throw(); |
| ~TextSourceAdaptor(); |
| virtual gr::UtfType utfEncodingForm(); |
| virtual size_t getLength(); |
| virtual size_t fetch(gr::toffset ichMin, size_t cch, gr::utf32 * prgchBuffer); |
| virtual size_t fetch(gr::toffset ichMin, size_t cch, gr::utf16 * prgchwBuffer); |
| virtual size_t fetch(gr::toffset ichMin, size_t cch, gr::utf8 * prgchsBuffer); |
| virtual bool getRightToLeft(gr::toffset ich); |
| virtual unsigned int getDirectionDepth(gr::toffset ich); |
| virtual float getVerticalOffset(gr::toffset ich); |
| virtual gr::isocode getLanguage(gr::toffset ich); |
| |
| virtual ext_std::pair<gr::toffset, gr::toffset> propertyRange(gr::toffset ich); |
| virtual size_t getFontFeatures(gr::toffset ich, gr::FeatureSetting * prgfset); |
| virtual bool sameSegment(gr::toffset ich1, gr::toffset ich2); |
| virtual bool featureVariations() { return false; } |
| |
| operator ImplLayoutArgs & () throw(); |
| void setFeatures(const grutils::GrFeatureParser * pFeatures); |
| const ImplLayoutArgs & getLayoutArgs() const { return maLayoutArgs; } |
| size_t getContextLength() const { return mnEnd; }; |
| inline void switchLayoutArgs(ImplLayoutArgs & newArgs); |
| private: |
| // Prevent the generation of a default assignment operator. |
| TextSourceAdaptor & operator=(const TextSourceAdaptor &); |
| |
| void getCharProperties(const int, int &, int &, size_t &); |
| |
| ImplLayoutArgs maLayoutArgs; |
| size_t mnEnd; |
| const grutils::GrFeatureParser * mpFeatures; |
| }; |
| |
| inline TextSourceAdaptor::TextSourceAdaptor(ImplLayoutArgs &la, const int nContextLen) throw() |
| : maLayoutArgs(la), |
| mnEnd(std::min(la.mnLength, nContextLen)), |
| mpFeatures(NULL) |
| { |
| } |
| |
| inline TextSourceAdaptor::operator ImplLayoutArgs & () throw() { |
| return maLayoutArgs; |
| } |
| |
| inline void TextSourceAdaptor::switchLayoutArgs(ImplLayoutArgs & aNewArgs) |
| { |
| mnEnd += aNewArgs.mnMinCharPos - maLayoutArgs.mnMinCharPos; |
| maLayoutArgs = aNewArgs; |
| } |
| |
| #endif |