layoutcursor.hpp

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Guido Tack <tack@gecode.org>
 *
 *  Copyright:
 *     Guido Tack, 2006
 *
 *  Last modified:
 *     $Date: 2010-08-11 12:41:24 +0200 (Wed, 11 Aug 2010) $ by $Author: tack $
 *     $Revision: 11340 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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namespace Gecode { namespace Gist {

  forceinline bool
  LayoutCursor::mayMoveDownwards(void) {
    return NodeCursor<VisualNode>::mayMoveDownwards() &&
           node()->isDirty();
  }

  inline
  LayoutCursor::LayoutCursor(VisualNode* theNode,
                             const VisualNode::NodeAllocator& na)
   : NodeCursor<VisualNode>(theNode,na) {}

  forceinline void
  LayoutCursor::processCurrentNode() {
    VisualNode* currentNode = node();
    if (currentNode->isDirty()) {
      if (currentNode->isHidden()) {
        // do nothing
      } else if (currentNode->getNumberOfChildren() < 1) {
        currentNode->setShape(Shape::leaf);
      } else {
        currentNode->computeShape(na,startNode());
      }
      currentNode->setDirty(false);
    }
    if (currentNode->getNumberOfChildren() >= 1)
      currentNode->setChildrenLayoutDone(true);
  }

}}

// STATISTICS: gist-any