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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <osl/diagnose.h>
#include <invmerge.hxx>
ScInvertMerger::ScInvertMerger( ::std::vector< tools::Rectangle >* pRectangles ) :
pRects( pRectangles )
{
// collect rectangles instead of inverting
}
ScInvertMerger::~ScInvertMerger()
{
Flush();
}
void ScInvertMerger::Flush()
{
FlushLine();
FlushTotal();
OSL_ENSURE( aLineRect.IsEmpty() && aTotalRect.IsEmpty(), "Flush: not empty" );
if ( !pRects )
return;
// also join vertically if there are non-adjacent columns involved
size_t nComparePos = 0;
while ( nComparePos < pRects->size() )
{
tools::Rectangle aCompRect = (*pRects)[nComparePos];
sal_Int32 nBottom = aCompRect.Bottom();
size_t nOtherPos = nComparePos + 1;
while ( nOtherPos < pRects->size() )
{
tools::Rectangle aOtherRect = (*pRects)[nOtherPos];
if ( aOtherRect.Top() > nBottom + 1 )
{
// rectangles are sorted, so we can stop searching
break;
}
if ( aOtherRect.Top() == nBottom + 1 &&
aOtherRect.Left() == aCompRect.Left() &&
aOtherRect.Right() == aCompRect.Right() )
{
// extend first rectangle
nBottom = aOtherRect.Bottom();
aCompRect.SetBottom( nBottom );
(*pRects)[nComparePos].SetBottom( nBottom );
// remove second rectangle
pRects->erase( pRects->begin() + nOtherPos );
// continue at unmodified nOtherPos
}
else
++nOtherPos;
}
++nComparePos;
}
}
void ScInvertMerger::FlushTotal()
{
if( aTotalRect.IsEmpty() )
return; // nothing to do
if ( pRects )
pRects->push_back( aTotalRect );
aTotalRect.SetEmpty();
}
void ScInvertMerger::FlushLine()
{
if( aLineRect.IsEmpty() )
return; // nothing to do
if ( aTotalRect.IsEmpty() )
{
aTotalRect = aLineRect; // start new total rect
}
else
{
if ( aLineRect.Left() == aTotalRect.Left() &&
aLineRect.Right() == aTotalRect.Right() &&
aLineRect.Top() == aTotalRect.Bottom() + 1 )
{
// extend total rect
aTotalRect.SetBottom( aLineRect.Bottom() );
}
else
{
FlushTotal(); // draw old total rect
aTotalRect = aLineRect; // and start new one
}
}
aLineRect.SetEmpty();
}
void ScInvertMerger::AddRect( const tools::Rectangle& rRect )
{
tools::Rectangle aJustified = rRect;
if ( rRect.Left() > rRect.Right() ) // switch for RTL layout
{
aJustified.SetLeft( rRect.Right() );
aJustified.SetRight( rRect.Left() );
}
if ( aLineRect.IsEmpty() )
{
aLineRect = aJustified; // start new line rect
}
else
{
bool bDone = false;
if ( aJustified.Top() == aLineRect.Top() &&
aJustified.Bottom() == aLineRect.Bottom() )
{
// try to extend line rect
if ( aJustified.Left() == aLineRect.Right() + 1 )
{
aLineRect.SetRight( aJustified.Right() );
bDone = true;
}
else if ( aJustified.Right() + 1 == aLineRect.Left() ) // for RTL layout
{
aLineRect.SetLeft( aJustified.Left() );
bDone = true;
}
}
if (!bDone)
{
FlushLine(); // use old line rect for total rect
aLineRect = aJustified; // and start new one
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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