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layoutcursor.cpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Guido Tack <tack@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Guido Tack, 2006
00008  *
00009  *  Last modified:
00010  *     $Date: 2009-01-21 11:36:29 +0100 (Wed, 21 Jan 2009) $ by $Author: schulte $
00011  *     $Revision: 8083 $
00012  *
00013  *  This file is part of Gecode, the generic constraint
00014  *  development environment:
00015  *     http://www.gecode.org
00016  *
00017  * Permission is hereby granted, free of charge, to any person obtaining
00018  * a copy of this software and associated documentation files (the
00019  * "Software"), to deal in the Software without restriction, including
00020  * without limitation the rights to use, copy, modify, merge, publish,
00021  * distribute, sublicense, and/or sell copies of the Software, and to
00022  * permit persons to whom the Software is furnished to do so, subject to
00023  * the following conditions:
00024  *
00025  * The above copyright notice and this permission notice shall be
00026  * included in all copies or substantial portions of the Software.
00027  *
00028  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00029  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00030  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00031  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00032  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00033  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00034  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00035  *
00036  */
00037 
00038 #include <gecode/gist/layoutcursor.hh>
00039 
00040 namespace Gecode { namespace Gist {
00041 
00042   Shape*
00043   Shape::allocate(Extent e, const Shape* subShape) {
00044     Shape* shape = Shape::allocate(subShape->depth() + 1);
00045     (*shape)[0] = e;
00046     for (int i=subShape->depth(); i--;) {
00047       (*shape)[i+1] = (*subShape)[i];
00048     }
00049     return shape;
00050   }
00051 
00052   Shape*
00053   Shape::allocate(const Shape* subShape) {
00054     Shape* shape = Shape::allocate(subShape->depth());
00055     for (int i=subShape->depth(); i--;) {
00056       (*shape)[i] = (*subShape)[i];
00057     }
00058     return shape;
00059   }
00060 
00061   bool
00062   Shape::getExtentAtDepth(int depth, Extent& extent) {
00063     if (depth > _depth)
00064       return false;
00065     extent = Extent(0,0);
00066     for (int i=0; i <= depth; i++) {
00067       Extent currentExtent = shape[i];
00068       extent.l += currentExtent.l;
00069       extent.r += currentExtent.r;
00070     }
00071     return true;
00072   }
00073 
00074   BoundingBox
00075   Shape::getBoundingBox(void) {
00076     int lastLeft = 0;
00077     int lastRight = 0;
00078     int left = 0;
00079     int right = 0;
00080     for (int i=0; i<_depth; i++) {
00081       Extent curExtent = shape[i];
00082       lastLeft = lastLeft + curExtent.l;
00083       lastRight = lastRight + curExtent.r;
00084       if (lastLeft < left)
00085         left = lastLeft;
00086       if (lastRight > right)
00087         right = lastRight;
00088     }
00089     return BoundingBox(left, right);
00090   }
00091 
00092   LayoutCursor::LayoutCursor(VisualNode* theNode)
00093    : NodeCursor<VisualNode>(theNode) {}
00094 
00095   void
00096   LayoutCursor::processCurrentNode() {
00097     VisualNode* currentNode = node();
00098     if (currentNode->isDirty()) {
00099       Extent extent(Layout::extent);
00100       unsigned int numberOfChildren = currentNode->getNumberOfChildren();
00101       if (currentNode->isHidden()) {
00102         currentNode->setShape(Shape::hidden);
00103       } else if (numberOfChildren < 1) {
00104         currentNode->setShape(Shape::leaf);
00105       } else {
00106         currentNode->computeShape(startNode());
00107       }
00108       currentNode->setDirty(false);
00109     }
00110     if (currentNode->getNumberOfChildren() >= 1)
00111       currentNode->setChildrenLayoutDone(true);
00112   }
00113 
00114 }}
00115 
00116 // STATISTICS: gist-any