1*06bcd5d2SAndrew Rist /************************************************************** 2cdf0e10cSrcweir * 3*06bcd5d2SAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 4*06bcd5d2SAndrew Rist * or more contributor license agreements. See the NOTICE file 5*06bcd5d2SAndrew Rist * distributed with this work for additional information 6*06bcd5d2SAndrew Rist * regarding copyright ownership. The ASF licenses this file 7*06bcd5d2SAndrew Rist * to you under the Apache License, Version 2.0 (the 8*06bcd5d2SAndrew Rist * "License"); you may not use this file except in compliance 9*06bcd5d2SAndrew Rist * with the License. You may obtain a copy of the License at 10*06bcd5d2SAndrew Rist * 11*06bcd5d2SAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12*06bcd5d2SAndrew Rist * 13*06bcd5d2SAndrew Rist * Unless required by applicable law or agreed to in writing, 14*06bcd5d2SAndrew Rist * software distributed under the License is distributed on an 15*06bcd5d2SAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*06bcd5d2SAndrew Rist * KIND, either express or implied. See the License for the 17*06bcd5d2SAndrew Rist * specific language governing permissions and limitations 18*06bcd5d2SAndrew Rist * under the License. 19*06bcd5d2SAndrew Rist * 20*06bcd5d2SAndrew Rist *************************************************************/ 21*06bcd5d2SAndrew Rist 22*06bcd5d2SAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir #ifndef INCLUDED_PDFI_TREEVISITING_HXX 25cdf0e10cSrcweir #define INCLUDED_PDFI_TREEVISITING_HXX 26cdf0e10cSrcweir 27cdf0e10cSrcweir #include <sal/config.h> 28cdf0e10cSrcweir #include <list> 29cdf0e10cSrcweir 30cdf0e10cSrcweir 31cdf0e10cSrcweir namespace pdfi 32cdf0e10cSrcweir { 33cdf0e10cSrcweir class PDFIProcessor; 34cdf0e10cSrcweir class StyleContainer; 35cdf0e10cSrcweir struct HyperlinkElement; 36cdf0e10cSrcweir struct TextElement; 37cdf0e10cSrcweir struct ParagraphElement; 38cdf0e10cSrcweir struct FrameElement; 39cdf0e10cSrcweir struct PolyPolyElement; 40cdf0e10cSrcweir struct ImageElement; 41cdf0e10cSrcweir struct PageElement; 42cdf0e10cSrcweir struct DocumentElement; 43cdf0e10cSrcweir struct EmitContext; 44cdf0e10cSrcweir struct Element; 45cdf0e10cSrcweir 46cdf0e10cSrcweir /** To be visited by all tree element types 47cdf0e10cSrcweir 48cdf0e10cSrcweir Visitor interface from the "visitor pattern". Implementor gets 49cdf0e10cSrcweir called with actual tree node instances. 50cdf0e10cSrcweir */ 51cdf0e10cSrcweir struct ElementTreeVisitor 52cdf0e10cSrcweir { 53cdf0e10cSrcweir virtual void visit( HyperlinkElement&, const std::list< Element* >::const_iterator& ) = 0; 54cdf0e10cSrcweir virtual void visit( TextElement&, const std::list< Element* >::const_iterator& ) = 0; 55cdf0e10cSrcweir virtual void visit( ParagraphElement&, const std::list< Element* >::const_iterator& ) = 0; 56cdf0e10cSrcweir virtual void visit( FrameElement&, const std::list< Element* >::const_iterator& ) = 0; 57cdf0e10cSrcweir virtual void visit( PolyPolyElement&, const std::list< Element* >::const_iterator& ) = 0; 58cdf0e10cSrcweir virtual void visit( ImageElement&, const std::list< Element* >::const_iterator& ) = 0; 59cdf0e10cSrcweir virtual void visit( PageElement&, const std::list< Element* >::const_iterator& ) = 0; 60cdf0e10cSrcweir virtual void visit( DocumentElement&, const std::list< Element* >::const_iterator& ) = 0; 61cdf0e10cSrcweir }; 62cdf0e10cSrcweir typedef boost::shared_ptr<ElementTreeVisitor> ElementTreeVisitorSharedPtr; 63cdf0e10cSrcweir 64cdf0e10cSrcweir /** Visitee interface 65cdf0e10cSrcweir 66cdf0e10cSrcweir To be implemented by every tree node that needs to be 67cdf0e10cSrcweir visitable. 68cdf0e10cSrcweir */ 69cdf0e10cSrcweir struct ElementTreeVisitable 70cdf0e10cSrcweir { 71cdf0e10cSrcweir virtual void visitedBy( ElementTreeVisitor&, const std::list< Element* >::const_iterator& rParentIt ) = 0; 72cdf0e10cSrcweir }; 73cdf0e10cSrcweir typedef boost::shared_ptr<ElementTreeVisitable> ElementTreeVisitableSharedPtr; 74cdf0e10cSrcweir } 75cdf0e10cSrcweir 76cdf0e10cSrcweir #endif 77