| /************************************************************** |
| * |
| * 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_TREEVISITORFACTORY_HXX |
| #define INCLUDED_PDFI_TREEVISITORFACTORY_HXX |
| |
| #include "pdfihelper.hxx" |
| #include <boost/shared_ptr.hpp> |
| |
| namespace pdfi |
| { |
| struct ElementTreeVisitor; |
| struct EmitContext; |
| class PDFIProcessor; |
| class StyleContainer; |
| |
| /** Tree manipulation factory |
| |
| Creates visitor objects performing various operations on the |
| pdf parse tree |
| */ |
| struct TreeVisitorFactory |
| { |
| virtual ~TreeVisitorFactory() {} |
| |
| /// Create visitor that combines tree nodes |
| virtual boost::shared_ptr<ElementTreeVisitor> createOptimizingVisitor(PDFIProcessor&) const = 0; |
| /// Create visitor that prepares style info |
| virtual boost::shared_ptr<ElementTreeVisitor> createStyleCollectingVisitor( |
| StyleContainer&, PDFIProcessor&) const = 0; |
| /// Create visitor that emits tree to an output target |
| virtual boost::shared_ptr<ElementTreeVisitor> createEmittingVisitor(EmitContext&, PDFIProcessor&) const = 0; |
| }; |
| |
| typedef boost::shared_ptr<TreeVisitorFactory> TreeVisitorFactorySharedPtr; |
| |
| TreeVisitorFactorySharedPtr createWriterTreeVisitorFactory(); |
| TreeVisitorFactorySharedPtr createImpressTreeVisitorFactory(); |
| TreeVisitorFactorySharedPtr createDrawTreeVisitorFactory(); |
| } |
| |
| #endif |
| |