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Current view: top level - slideshow/source/engine/shapes - drawshapesubsetting.hxx (source / functions) Hit Total Coverage
Test: commit c8344322a7af75b84dd3ca8f78b05543a976dfd5 Lines: 0 7 0.0 %
Date: 2015-06-13 12:38:46 Functions: 0 7 0.0 %
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       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_SLIDESHOW_SOURCE_ENGINE_SHAPES_DRAWSHAPESUBSETTING_HXX
      21             : #define INCLUDED_SLIDESHOW_SOURCE_ENGINE_SHAPES_DRAWSHAPESUBSETTING_HXX
      22             : 
      23             : #include <boost/shared_ptr.hpp>
      24             : #include <boost/noncopyable.hpp>
      25             : 
      26             : #include "doctreenode.hxx"
      27             : #include "attributableshape.hxx"
      28             : 
      29             : 
      30             : class GDIMetaFile;
      31             : 
      32             : namespace slideshow
      33             : {
      34             :     namespace internal
      35             :     {
      36             :         /** This class encapsulates the subsetting aspects of a
      37             :             DrawShape.
      38             :          */
      39           0 :         class DrawShapeSubsetting : private boost::noncopyable
      40             :         {
      41             :         public:
      42             :             /** Create empty shape subset handling.
      43             : 
      44             :                 This method creates a subset handler which contains no
      45             :                 subset information. All methods will return default
      46             :                 values.
      47             : 
      48             :                 @param rMtf
      49             :                 Metafile to retrieve subset info from (must have been
      50             :                 generated with verbose text comments switched on).
      51             :              */
      52             :             DrawShapeSubsetting();
      53             : 
      54             :             /** Create new shape subset handling.
      55             : 
      56             :                 @param rShapeSubset
      57             :                 The subset this object represents (can be empty, then
      58             :                 denoting 'represents a whole shape')
      59             : 
      60             :                 @param rMtf
      61             :                 Metafile to retrieve subset info from (must have been
      62             :                 generated with verbose text comments switched on).
      63             :              */
      64             :             DrawShapeSubsetting( const DocTreeNode&                         rShapeSubset,
      65             :                                  const ::boost::shared_ptr< GDIMetaFile >&  rMtf );
      66             : 
      67             :             /** Reset metafile.
      68             : 
      69             :                 Use this method to completely reset the
      70             :                 ShapeSubsetting, with a new metafile. Note that any
      71             :                 information previously set will be lost, including
      72             :                 added subset shapes!
      73             : 
      74             :                 @param rMtf
      75             :                 Metafile to retrieve subset info from (must have been
      76             :                 generated with verbose text comments switched on).
      77             :              */
      78             :             void reset( const ::boost::shared_ptr< GDIMetaFile >&   rMtf );
      79             : 
      80             :             // Shape subsetting methods
      81             : 
      82             : 
      83             :             /// Return subset node for this shape
      84             :             DocTreeNode                 getSubsetNode       () const;
      85             : 
      86             :             /// Get subset shape for given node, if any
      87             :             AttributableShapeSharedPtr  getSubsetShape      ( const DocTreeNode& rTreeNode ) const;
      88             : 
      89             :             /// Add child subset shape (or increase use count, if already existent)
      90             :             void                        addSubsetShape      ( const AttributableShapeSharedPtr& rShape );
      91             : 
      92             :             /** Revoke subset shape
      93             : 
      94             :                 This method revokes a subset shape, decrementing the
      95             :                 use count for this subset by one. If the use count
      96             :                 reaches zero (i.e. when the number of addSubsetShape()
      97             :                 matches the number of revokeSubsetShape() calls for
      98             :                 the same subset), the subset entry is removed from the
      99             :                 internal list, and subsequent getSubsetShape() calls
     100             :                 will return the empty pointer for this subset.
     101             : 
     102             :                 @return true, if the subset shape was physically
     103             :                 removed from the list (false is returned, when nothing
     104             :                 was removed, either because only the use count was
     105             :                 decremented, or there was no such subset found, in the
     106             :                 first place).
     107             :              */
     108             :             bool                        revokeSubsetShape   ( const AttributableShapeSharedPtr& rShape );
     109             : 
     110             : 
     111             :             // Doc tree methods
     112             : 
     113             : 
     114             :             /// Return overall number of nodes for given type
     115             :             sal_Int32   getNumberOfTreeNodes        ( DocTreeNode::NodeType eNodeType ) const;
     116             : 
     117             :             /// Return tree node of given index and given type
     118             :             DocTreeNode getTreeNode                 ( sal_Int32             nNodeIndex,
     119             :                                                       DocTreeNode::NodeType eNodeType ) const;
     120             : 
     121             :             /// Return number of nodes of given type, below parent node
     122             :             sal_Int32   getNumberOfSubsetTreeNodes  ( const DocTreeNode&    rParentNode,
     123             :                                                       DocTreeNode::NodeType eNodeType ) const;
     124             : 
     125             :             /// Return tree node of given index and given type, relative to parent node
     126             :             DocTreeNode getSubsetTreeNode           ( const DocTreeNode&    rParentNode,
     127             :                                                       sal_Int32             nNodeIndex,
     128             :                                                       DocTreeNode::NodeType eNodeType ) const;
     129             : 
     130             :             // Helper
     131             : 
     132             : 
     133             :             /** Return a vector of currently active subsets.
     134             : 
     135             :                 Needed when rendering a shape, this method provides a
     136             :                 vector of subsets currently visible (the range as
     137             :                 returned by getEffectiveSubset(), minus the parts that
     138             :                 are currently hidden, because displayed by child
     139             :                 shapes).
     140             :              */
     141           0 :             const VectorOfDocTreeNodes& getActiveSubsets() const {  return maCurrentSubsets; }
     142             : 
     143             :             /** This enum classifies each action index in the
     144             :                 metafile.
     145             : 
     146             :                 Of interest are, of course, the places where
     147             :                 structural shape and/or text elements end. The
     148             :                 remainder of the action gets classified as 'noop'
     149             :              */
     150             :             enum IndexClassificator
     151             :             {
     152             :                 CLASS_NOOP,
     153             :                 CLASS_SHAPE_START,
     154             :                 CLASS_SHAPE_END,
     155             : 
     156             :                 CLASS_LINE_END,
     157             :                 CLASS_PARAGRAPH_END,
     158             :                 CLASS_SENTENCE_END,
     159             :                 CLASS_WORD_END,
     160             :                 CLASS_CHARACTER_CELL_END
     161             :             };
     162             : 
     163             :             typedef ::std::vector< IndexClassificator > IndexClassificatorVector;
     164             : 
     165             :         private:
     166             :             /** Entry for subset shape
     167             : 
     168             :                 This struct contains data for every subset shape
     169             :                 generated. Note that for a given start/end action
     170             :                 index combination, only one subset instance is
     171             :                 generated (and reused for subsequent queries).
     172             :              */
     173           0 :             struct SubsetEntry
     174             :             {
     175             :                 AttributableShapeSharedPtr  mpShape;
     176             :                 sal_Int32                   mnStartActionIndex;
     177             :                 sal_Int32                   mnEndActionIndex;
     178             : 
     179             :                 /// Number of times this subset was queried, and not yet revoked
     180             :                 int                         mnSubsetQueriedCount;
     181             : 
     182           0 :                 sal_Int32 getHashValue() const
     183             :                 {
     184             :                     // TODO(Q3): That's a hack. We assume that start
     185             :                     // index will always be less than 65535 (if this
     186             :                     // assumption is violated, hash map performance
     187             :                     // will degrade severely)
     188           0 :                     return mnStartActionIndex*SAL_MAX_INT16 + mnEndActionIndex;
     189             :                 }
     190             : 
     191             :                 /// The shape set is ordered according to this method
     192           0 :                 bool operator<(const SubsetEntry& rOther) const
     193             :                 {
     194           0 :                     return getHashValue() < rOther.getHashValue();
     195             :                 }
     196             : 
     197             :             };
     198             : 
     199             :             typedef ::std::set< SubsetEntry >       ShapeSet;
     200             : 
     201             :             void ensureInitializedNodeTree() const;
     202             :             void updateSubsetBounds( const SubsetEntry& rSubsetEntry );
     203             :             void updateSubsets();
     204             :             void initCurrentSubsets();
     205             :             void reset();
     206             : 
     207             :             static sal_Int32   implGetNumberOfTreeNodes( const IndexClassificatorVector::const_iterator&   rBegin,
     208             :                                                   const IndexClassificatorVector::const_iterator&   rEnd,
     209             :                                                   DocTreeNode::NodeType                             eNodeType );
     210             :             DocTreeNode implGetTreeNode( const IndexClassificatorVector::const_iterator&    rBegin,
     211             :                                          const IndexClassificatorVector::const_iterator&    rEnd,
     212             :                                          sal_Int32                                          nNodeIndex,
     213             :                                          DocTreeNode::NodeType                              eNodeType ) const;
     214             : 
     215             :             mutable IndexClassificatorVector    maActionClassVector;
     216             : 
     217             :             /// Metafile to retrieve subset info from
     218             :             ::boost::shared_ptr< GDIMetaFile >  mpMtf;
     219             : 
     220             :             /// Subset of the metafile represented by this object
     221             :             DocTreeNode                         maSubset;
     222             : 
     223             :             /// the list of subset shapes spawned from this one.
     224             :             ShapeSet                            maSubsetShapes;
     225             : 
     226             :             /// caches minimal subset index from maSubsetShapes
     227             :             sal_Int32                           mnMinSubsetActionIndex;
     228             : 
     229             :             /// caches maximal subset index from maSubsetShapes
     230             :             sal_Int32                           mnMaxSubsetActionIndex;
     231             : 
     232             :             /** Current number of subsets to render (calculated from
     233             :                 maSubset and mnMin/MaxSubsetActionIndex).
     234             : 
     235             :                 Note that this is generally _not_ equivalent to
     236             :                 maSubset, as it excludes all active subset children!
     237             :              */
     238             :             mutable VectorOfDocTreeNodes        maCurrentSubsets;
     239             : 
     240             :             /// Whether the shape's doc tree has been initialized successfully, or not
     241             :             mutable bool                        mbNodeTreeInitialized;
     242             :         };
     243             : 
     244             :     }
     245             : }
     246             : 
     247             : #endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_SHAPES_DRAWSHAPESUBSETTING_HXX
     248             : 
     249             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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