sdext/source/pdfimport/inc/treevisitorfactory.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_SDEXT_SOURCE_PDFIMPORT_INC_TREEVISITORFACTORY_HXX
  21 #define INCLUDED_SDEXT_SOURCE_PDFIMPORT_INC_TREEVISITORFACTORY_HXX
  22
  23 #include "pdfihelper.hxx"
  24 #include <memory>
  25
  26 namespace pdfi
  27 {
  28     struct ElementTreeVisitor;
  29     struct EmitContext;
  30     class PDFIProcessor;
  31     class StyleContainer;
  32
  33     /** Tree manipulation factory
  34
  35         Creates visitor objects performing various operations on the
  36         pdf parse tree
  37      */
  38     struct TreeVisitorFactory
  39     {
  40         virtual ~TreeVisitorFactory() {}
  41
  42         /// Create visitor that combines tree nodes
  43         virtual std::shared_ptr<ElementTreeVisitor> createOptimizingVisitor(PDFIProcessor&) const = 0;
  44         /// Create visitor that prepares style info
  45         virtual std::shared_ptr<ElementTreeVisitor> createStyleCollectingVisitor(
  46             StyleContainer&, PDFIProcessor&) const = 0;
  47         /// Create visitor that emits tree to an output target
  48         virtual std::shared_ptr<ElementTreeVisitor> createEmittingVisitor(EmitContext&) const = 0;
  49     };
  50
  51     typedef std::shared_ptr<TreeVisitorFactory> TreeVisitorFactorySharedPtr;
  52
  53     TreeVisitorFactorySharedPtr createWriterTreeVisitorFactory();
  54     TreeVisitorFactorySharedPtr createImpressTreeVisitorFactory();
  55     TreeVisitorFactorySharedPtr createDrawTreeVisitorFactory();
  56 }
  57
  58 #endif
  59
  60 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */