1 /************************************************************************* 2 * 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * Copyright 2000, 2010 Oracle and/or its affiliates. 6 * 7 * OpenOffice.org - a multi-platform office productivity suite 8 * 9 * This file is part of OpenOffice.org. 10 * 11 * OpenOffice.org is free software: you can redistribute it and/or modify 12 * it under the terms of the GNU Lesser General Public License version 3 13 * only, as published by the Free Software Foundation. 14 * 15 * OpenOffice.org is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU Lesser General Public License version 3 for more details 19 * (a copy is included in the LICENSE file that accompanied this code). 20 * 21 * You should have received a copy of the GNU Lesser General Public License 22 * version 3 along with OpenOffice.org. If not, see 23 * <http://www.openoffice.org/license.html> 24 * for a copy of the LGPLv3 License. 25 * 26 ************************************************************************/ 27 28 // MARKER(update_precomp.py): autogen include statement, do not remove 29 #include "precompiled_canvas.hxx" 30 31 #include <boost/bind.hpp> 32 #include "page.hxx" 33 34 namespace canvas 35 { 36 Page::Page( const IRenderModuleSharedPtr &rRenderModule ) : 37 mpRenderModule(rRenderModule), 38 mpSurface(rRenderModule->createSurface(::basegfx::B2ISize())) 39 { 40 } 41 42 void Page::validate() 43 { 44 if(!(isValid())) 45 { 46 ::std::for_each( mpFragments.begin(), 47 mpFragments.end(), 48 ::boost::mem_fn(&PageFragment::refresh)); 49 } 50 } 51 52 bool Page::isValid() const 53 { 54 return mpSurface && mpSurface->isValid(); 55 } 56 57 FragmentSharedPtr Page::allocateSpace( const ::basegfx::B2ISize& rSize ) 58 { 59 SurfaceRect rect(rSize); 60 if(insert(rect)) 61 { 62 FragmentSharedPtr pFragment(new PageFragment(rect,this)); 63 mpFragments.push_back(pFragment); 64 return pFragment; 65 } 66 67 return FragmentSharedPtr(); 68 } 69 70 bool Page::nakedFragment( const FragmentSharedPtr& pFragment ) 71 { 72 SurfaceRect rect(pFragment->getSize()); 73 if(insert(rect)) 74 { 75 pFragment->setPage(this); 76 mpFragments.push_back(pFragment); 77 return true; 78 } 79 80 return false; 81 } 82 83 void Page::free( const FragmentSharedPtr& pFragment ) 84 { 85 // the fragment passes as argument is no longer 86 // dedicated to this page. either it is about to 87 // be relocated to some other page or it will 88 // currently be deleted. in either case, simply 89 // remove the reference from our internal storage. 90 FragmentContainer_t::iterator it( 91 std::remove( 92 mpFragments.begin(),mpFragments.end(),pFragment)); 93 mpFragments.erase(it,mpFragments.end()); 94 } 95 96 bool Page::insert( SurfaceRect& r ) 97 { 98 const FragmentContainer_t::const_iterator aEnd(mpFragments.end()); 99 FragmentContainer_t::const_iterator it(mpFragments.begin()); 100 while(it != aEnd) 101 { 102 const SurfaceRect &rect = (*it)->getRect(); 103 const sal_Int32 x = rect.maPos.getX(); 104 const sal_Int32 y = rect.maPos.getY(); 105 // to avoid interpolation artifacts from other textures, 106 // one pixel gap between them 107 const sal_Int32 w = rect.maSize.getX()+1; 108 const sal_Int32 h = rect.maSize.getY()+1; 109 110 // probe location to the right 111 r.maPos.setX(x+w); 112 r.maPos.setY(y); 113 if(isValidLocation(r)) 114 return true; 115 116 // probe location at bottom 117 r.maPos.setX(x); 118 r.maPos.setY(y+h); 119 if(isValidLocation(r)) 120 return true; 121 122 ++it; 123 } 124 125 r.maPos.setX(0); 126 r.maPos.setY(0); 127 128 return isValidLocation(r); 129 } 130 131 bool Page::isValidLocation( const SurfaceRect& r ) const 132 { 133 // the rectangle passed as argument has a valid 134 // location if and only if there's no intersection 135 // with existing areas. 136 SurfaceRect aBoundary(mpRenderModule->getPageSize()-basegfx::B2IVector(1,1)); 137 if( !r.inside(aBoundary) ) 138 return false; 139 140 const FragmentContainer_t::const_iterator aEnd(mpFragments.end()); 141 FragmentContainer_t::const_iterator it(mpFragments.begin()); 142 while(it != aEnd) 143 { 144 if(r.intersection((*it)->getRect())) 145 return false; 146 147 ++it; 148 } 149 150 return true; 151 } 152 } 153