/************************************************************** * * 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 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. * *************************************************************/ #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 // Platform #ifndef _SVWIN_H #include #endif #include #include #include // Module #include "vcl/dllapi.h" // Libraries #include #include #include #include #include // 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 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