/* This file is part of the KDE project
   Copyright 2005-2006 Stefan Nikolaus <stefan.nikolaus@kdemail.net>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

// Local
#include "StyleCommand.h"

#include <QBrush>

#include <kdebug.h>
#include <klocale.h>

#include "Cell.h"
#include "CellStorage.h"
#include "Sheet.h"
#include "Style.h"
#include "StyleStorage.h"

using namespace KSpread;

StyleCommand::StyleCommand(QUndoCommand* parent)
    : AbstractRegionCommand(parent)
    , m_horizontalPen( QPen(QColor(), 0, Qt::NoPen) )
    , m_verticalPen( QPen(QColor(), 0, Qt::NoPen) )
    , m_horizontalPenChanged( false )
    , m_verticalPenChanged( false )
    , m_style( new Style() )
{
}

StyleCommand::~StyleCommand()
{
    delete m_style;
}

bool StyleCommand::process(Element* element)
{
    const QRect range = element->rect();
    if ( !m_reverse ) // (re)do
    {
        if ( m_firstrun )
        {
            const QRect rect = range.adjusted(m_style->hasAttribute(Style::LeftPen) ? -1 : 0,
                                              m_style->hasAttribute(Style::TopPen) ? -1 : 0,
                                              m_style->hasAttribute(Style::RightPen) ? 1 : 0,
                                              m_style->hasAttribute(Style::BottomPen) ? 1 : 0);
            const QList< QPair<QRectF,SharedSubStyle> > rawUndoData
                    = m_sheet->styleStorage()->undoData( Region(rect) );
            for ( int i = 0; i < rawUndoData.count(); ++i )
            {
//                 if ( m_style->hasAttribute( rawUndoData[i].second->type() ) ||
//                      rawUndoData[i].second->type() == Style::DefaultStyleKey ||
//                      rawUndoData[i].second->type() == Style::NamedStyleKey )
                    m_undoData << rawUndoData[i];
            }
        }
        // special handling for the border
        bool hasLeftPen = m_style->hasAttribute( Style::LeftPen );
        bool hasRightPen = m_style->hasAttribute( Style::RightPen );
        bool hasTopPen = m_style->hasAttribute( Style::TopPen );
        bool hasBottomPen = m_style->hasAttribute( Style::BottomPen );
        const QPen leftPen = m_style->leftBorderPen();
        const QPen rightPen = m_style->rightBorderPen();
        const QPen topPen = m_style->topBorderPen();
        const QPen bottomPen = m_style->bottomBorderPen();
        m_style->clearAttribute( Style::LeftPen );
        m_style->clearAttribute( Style::RightPen );
        m_style->clearAttribute( Style::TopPen );
        m_style->clearAttribute( Style::BottomPen );

        // use the horizontal/vertical pens
        if ( m_horizontalPenChanged )
        {
            m_style->setTopBorderPen( m_horizontalPen );
            m_style->setBottomBorderPen( m_horizontalPen );
            hasTopPen = hasBottomPen = true;
        }
        if ( m_verticalPenChanged )
        {
            m_style->setLeftBorderPen( m_verticalPen );
            m_style->setRightBorderPen( m_verticalPen );
            hasLeftPen = hasRightPen = true;
        }

        // special handling for indentation: reset the indentation first
        if ( m_style->hasAttribute( Style::Indentation ) )
        {
            Style style;
            style.setIndentation( 0 );
            m_sheet->cellStorage()->setStyle( Region(range), style );
        }

        // special handling for precision: reset the precision first
        if ( m_style->hasAttribute( Style::Precision ) )
        {
            Style style;
            style.setPrecision( 0 ); // insert storage default
            m_sheet->cellStorage()->setStyle( Region(range), style );
        }

        // set the actual style
        m_sheet->cellStorage()->setStyle( Region(range), *m_style );

        // prepare to restore pens
        m_style->clearAttribute( Style::LeftPen );
        m_style->clearAttribute( Style::RightPen );
        m_style->clearAttribute( Style::TopPen );
        m_style->clearAttribute( Style::BottomPen );

        // set the outer border styles
        Style style;
        if ( hasLeftPen )
        {
            style.setLeftBorderPen( leftPen );
            m_sheet->cellStorage()->setStyle( Region(QRect(range.left(), range.top(), 1, range.height())), style );
            m_style->setLeftBorderPen(leftPen); // restore pen
            // reset the border of the adjacent cell
            if (range.left() > 1)
            {
                Style tmpStyle;
                tmpStyle.setRightBorderPen(QPen(Qt::NoPen));
                const Region region(QRect(range.left() - 1, range.top(), 1, range.height()));
                m_sheet->cellStorage()->setStyle(region, tmpStyle);
                m_sheet->setRegionPaintDirty(region);
            }
        }
        if ( hasRightPen )
        {
            style.clear();
            style.setRightBorderPen( rightPen );
            m_sheet->cellStorage()->setStyle( Region(QRect(range.right(), range.top(), 1, range.height())), style );
            m_style->setRightBorderPen(rightPen); // restore pen
            // reset the border of the adjacent cell
            if (range.right() < KS_colMax)
            {
                Style tmpStyle;
                tmpStyle.setLeftBorderPen(QPen(Qt::NoPen));
                const Region region(QRect(range.right() + 1, range.top(), 1, range.height()));
                m_sheet->cellStorage()->setStyle(region, tmpStyle);
                m_sheet->setRegionPaintDirty(region);
            }
        }
        if ( hasTopPen )
        {
            style.clear();
            style.setTopBorderPen( topPen );
            m_sheet->cellStorage()->setStyle( Region(QRect(range.left(), range.top(), range.width(), 1)), style );
            m_style->setTopBorderPen(topPen); // restore pen
            // reset the border of the adjacent cell
            if (range.top() > 1)
            {
                Style tmpStyle;
                tmpStyle.setBottomBorderPen(QPen(Qt::NoPen));
                const Region region(QRect(range.left(), range.top() - 1, range.width(), 1));
                m_sheet->cellStorage()->setStyle(region, tmpStyle);
                m_sheet->setRegionPaintDirty(region);
            }
        }
        if ( hasBottomPen )
        {
            style.clear();
            style.setBottomBorderPen( bottomPen );
            m_sheet->cellStorage()->setStyle( Region(QRect(range.left(), range.bottom(), range.width(), 1)), style );
            m_style->setBottomBorderPen(bottomPen); // restore pen
            // reset the border of the adjacent cell
            if (range.bottom() < KS_rowMax)
            {
                Style tmpStyle;
                tmpStyle.setTopBorderPen(QPen(Qt::NoPen));
                const Region region(QRect(range.left(), range.bottom() + 1, range.width(), 1));
                m_sheet->cellStorage()->setStyle(region, tmpStyle);
                m_sheet->setRegionPaintDirty(region);
            }
        }
    }
    return true;
}

bool StyleCommand::preProcessing()
{
    if (m_firstrun)
    {
        if ( m_style->isDefault() )
            setText( i18n( "Reset Style" ) );
        else
            setText( i18n( "Change Style" ) );

        // special handling for precision
        if ( m_style->hasAttribute( Style::Precision ) )
        {
            if ( m_style->precision() == -1 ) // Style default
                m_style->setPrecision( 0 ); // storage default
            else if ( m_style->precision() == 0 )
                m_style->setPrecision( -1 ); // anything resulting in zero, but not storage default
        }
    }
    return AbstractRegionCommand::preProcessing();
}

bool StyleCommand::mainProcessing()
{
    if ( !m_reverse )
    {
    }
    else // m_reverse
    {
        Style style;
        style.setDefault();
        // special handling for indentation
        style.setIndentation( 0 ); // reset to zero
        // special handling for precision
        style.setPrecision( 0 ); // reset to storage default
        m_sheet->cellStorage()->setStyle( *this, style );
        for ( int i = 0; i < m_undoData.count(); ++i )
        {
            m_sheet->styleStorage()->insert( m_undoData[i].first.toRect(), m_undoData[i].second );
        }
    }
    return AbstractRegionCommand::mainProcessing();
}

bool StyleCommand::postProcessing()
{
    return true;
}
