| /************************************************************** |
| * |
| * 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 INCLUDED_PDFI_TREEVISITING_HXX |
| #define INCLUDED_PDFI_TREEVISITING_HXX |
| |
| #include <sal/config.h> |
| #include <list> |
| |
| |
| namespace pdfi |
| { |
| class PDFIProcessor; |
| class StyleContainer; |
| struct HyperlinkElement; |
| struct TextElement; |
| struct ParagraphElement; |
| struct FrameElement; |
| struct PolyPolyElement; |
| struct ImageElement; |
| struct PageElement; |
| struct DocumentElement; |
| struct EmitContext; |
| struct Element; |
| |
| /** To be visited by all tree element types |
| |
| Visitor interface from the "visitor pattern". Implementor gets |
| called with actual tree node instances. |
| */ |
| struct ElementTreeVisitor |
| { |
| virtual void visit( HyperlinkElement&, const std::list< Element* >::const_iterator& ) = 0; |
| virtual void visit( TextElement&, const std::list< Element* >::const_iterator& ) = 0; |
| virtual void visit( ParagraphElement&, const std::list< Element* >::const_iterator& ) = 0; |
| virtual void visit( FrameElement&, const std::list< Element* >::const_iterator& ) = 0; |
| virtual void visit( PolyPolyElement&, const std::list< Element* >::const_iterator& ) = 0; |
| virtual void visit( ImageElement&, const std::list< Element* >::const_iterator& ) = 0; |
| virtual void visit( PageElement&, const std::list< Element* >::const_iterator& ) = 0; |
| virtual void visit( DocumentElement&, const std::list< Element* >::const_iterator& ) = 0; |
| }; |
| typedef boost::shared_ptr<ElementTreeVisitor> ElementTreeVisitorSharedPtr; |
| |
| /** Visitee interface |
| |
| To be implemented by every tree node that needs to be |
| visitable. |
| */ |
| struct ElementTreeVisitable |
| { |
| virtual void visitedBy( ElementTreeVisitor&, const std::list< Element* >::const_iterator& rParentIt ) = 0; |
| }; |
| typedef boost::shared_ptr<ElementTreeVisitable> ElementTreeVisitableSharedPtr; |
| } |
| |
| #endif |