1*06bcd5d2SAndrew Rist /**************************************************************
2cdf0e10cSrcweir  *
3*06bcd5d2SAndrew Rist  * Licensed to the Apache Software Foundation (ASF) under one
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21*06bcd5d2SAndrew Rist 
22*06bcd5d2SAndrew Rist 
23cdf0e10cSrcweir 
24cdf0e10cSrcweir #ifndef INCLUDED_PDFI_TREEVISITORFACTORY_HXX
25cdf0e10cSrcweir #define INCLUDED_PDFI_TREEVISITORFACTORY_HXX
26cdf0e10cSrcweir 
27cdf0e10cSrcweir #include "pdfihelper.hxx"
28cdf0e10cSrcweir #include <boost/shared_ptr.hpp>
29cdf0e10cSrcweir 
30cdf0e10cSrcweir namespace pdfi
31cdf0e10cSrcweir {
32cdf0e10cSrcweir     struct ElementTreeVisitor;
33cdf0e10cSrcweir     struct EmitContext;
34cdf0e10cSrcweir     class PDFIProcessor;
35cdf0e10cSrcweir     class StyleContainer;
36cdf0e10cSrcweir 
37cdf0e10cSrcweir     /** Tree manipulation factory
38cdf0e10cSrcweir 
39cdf0e10cSrcweir         Creates visitor objects performing various operations on the
40cdf0e10cSrcweir         pdf parse tree
41cdf0e10cSrcweir      */
42cdf0e10cSrcweir     struct TreeVisitorFactory
43cdf0e10cSrcweir     {
~TreeVisitorFactorypdfi::TreeVisitorFactory44cdf0e10cSrcweir         virtual ~TreeVisitorFactory() {}
45cdf0e10cSrcweir 
46cdf0e10cSrcweir         /// Create visitor that combines tree nodes
47cdf0e10cSrcweir         virtual boost::shared_ptr<ElementTreeVisitor> createOptimizingVisitor(PDFIProcessor&) const = 0;
48cdf0e10cSrcweir         /// Create visitor that prepares style info
49cdf0e10cSrcweir         virtual boost::shared_ptr<ElementTreeVisitor> createStyleCollectingVisitor(
50cdf0e10cSrcweir             StyleContainer&, PDFIProcessor&) const = 0;
51cdf0e10cSrcweir         /// Create visitor that emits tree to an output target
52cdf0e10cSrcweir         virtual boost::shared_ptr<ElementTreeVisitor> createEmittingVisitor(EmitContext&, PDFIProcessor&) const = 0;
53cdf0e10cSrcweir     };
54cdf0e10cSrcweir 
55cdf0e10cSrcweir     typedef boost::shared_ptr<TreeVisitorFactory> TreeVisitorFactorySharedPtr;
56cdf0e10cSrcweir 
57cdf0e10cSrcweir     TreeVisitorFactorySharedPtr createWriterTreeVisitorFactory();
58cdf0e10cSrcweir     TreeVisitorFactorySharedPtr createImpressTreeVisitorFactory();
59cdf0e10cSrcweir     TreeVisitorFactorySharedPtr createDrawTreeVisitorFactory();
60cdf0e10cSrcweir }
61cdf0e10cSrcweir 
62cdf0e10cSrcweir #endif
63cdf0e10cSrcweir 
64