Line data    Source code

       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             : #include <boost/mem_fn.hpp>
      21             : #include "page.hxx"
      22             : 
      23             : namespace canvas
      24             : {
      25           0 :     Page::Page( const IRenderModuleSharedPtr &rRenderModule ) :
      26             :         mpRenderModule(rRenderModule),
      27           0 :         mpSurface(rRenderModule->createSurface(::basegfx::B2ISize()))
      28             :     {
      29           0 :     }
      30             : 
      31           0 :     void Page::validate()
      32             :     {
      33           0 :         if(!(isValid()))
      34             :         {
      35             :             ::std::for_each( mpFragments.begin(),
      36             :                              mpFragments.end(),
      37           0 :                              ::boost::mem_fn(&PageFragment::refresh));
      38             :         }
      39           0 :     }
      40             : 
      41           0 :     bool Page::isValid() const
      42             :     {
      43           0 :         return mpSurface && mpSurface->isValid();
      44             :     }
      45             : 
      46           0 :     FragmentSharedPtr Page::allocateSpace( const ::basegfx::B2ISize& rSize )
      47             :     {
      48           0 :         SurfaceRect rect(rSize);
      49           0 :         if(insert(rect))
      50             :         {
      51           0 :             FragmentSharedPtr pFragment(new PageFragment(rect,this));
      52           0 :             mpFragments.push_back(pFragment);
      53           0 :             return pFragment;
      54             :         }
      55             : 
      56           0 :         return FragmentSharedPtr();
      57             :     }
      58             : 
      59           0 :     bool Page::nakedFragment( const FragmentSharedPtr& pFragment )
      60             :     {
      61           0 :         SurfaceRect rect(pFragment->getSize());
      62           0 :         if(insert(rect))
      63             :         {
      64           0 :             pFragment->setPage(this);
      65           0 :             mpFragments.push_back(pFragment);
      66           0 :             return true;
      67             :         }
      68             : 
      69           0 :         return false;
      70             :     }
      71             : 
      72           0 :     void Page::free( const FragmentSharedPtr& pFragment )
      73             :     {
      74             :         // the fragment passes as argument is no longer
      75             :         // dedicated to this page. either it is about to
      76             :         // be relocated to some other page or it will
      77             :         // currently be deleted. in either case, simply
      78             :         // remove the reference from our internal storage.
      79             :         FragmentContainer_t::iterator it(
      80             :             std::remove(
      81           0 :                 mpFragments.begin(),mpFragments.end(),pFragment));
      82           0 :         mpFragments.erase(it,mpFragments.end());
      83           0 :     }
      84             : 
      85           0 :     bool Page::insert( SurfaceRect& r )
      86             :     {
      87           0 :         const FragmentContainer_t::const_iterator aEnd(mpFragments.end());
      88           0 :         FragmentContainer_t::const_iterator       it(mpFragments.begin());
      89           0 :         while(it != aEnd)
      90             :         {
      91           0 :             const SurfaceRect &rect = (*it)->getRect();
      92           0 :             const sal_Int32 x = rect.maPos.getX();
      93           0 :             const sal_Int32 y = rect.maPos.getY();
      94             :             // to avoid interpolation artifacts from other textures,
      95             :             // one pixel gap between them
      96           0 :             const sal_Int32 w = rect.maSize.getX()+1;
      97           0 :             const sal_Int32 h = rect.maSize.getY()+1;
      98             : 
      99             :             // probe location to the right
     100           0 :             r.maPos.setX(x+w);
     101           0 :             r.maPos.setY(y);
     102           0 :             if(isValidLocation(r))
     103           0 :                 return true;
     104             : 
     105             :             // probe location at bottom
     106           0 :             r.maPos.setX(x);
     107           0 :             r.maPos.setY(y+h);
     108           0 :             if(isValidLocation(r))
     109           0 :                 return true;
     110             : 
     111           0 :             ++it;
     112             :         }
     113             : 
     114           0 :         r.maPos.setX(0);
     115           0 :         r.maPos.setY(0);
     116             : 
     117           0 :         return isValidLocation(r);
     118             :     }
     119             : 
     120           0 :     bool Page::isValidLocation( const SurfaceRect& r ) const
     121             :     {
     122             :         // the rectangle passed as argument has a valid
     123             :         // location if and only if there's no intersection
     124             :         // with existing areas.
     125           0 :         SurfaceRect aBoundary(mpRenderModule->getPageSize()-basegfx::B2IVector(1,1));
     126           0 :         if( !r.inside(aBoundary) )
     127           0 :             return false;
     128             : 
     129           0 :         const FragmentContainer_t::const_iterator aEnd(mpFragments.end());
     130           0 :         FragmentContainer_t::const_iterator       it(mpFragments.begin());
     131           0 :         while(it != aEnd)
     132             :         {
     133           0 :             if(r.intersection((*it)->getRect()))
     134           0 :                 return false;
     135             : 
     136           0 :             ++it;
     137             :         }
     138             : 
     139           0 :         return true;
     140             :     }
     141             : }
     142             : 
     143             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */