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#include "precompiled_svtools.hxx"

#include "mousefunction.hxx"
#include "svtools/table/tablecontrolinterface.hxx"

#include <tools/diagnose_ex.h>
#include <vcl/window.hxx>

//......................................................................................................................
namespace svt { namespace table
{
//......................................................................................................................

    //==================================================================================================================
    //= MouseFunction
    //==================================================================================================================
    //------------------------------------------------------------------------------------------------------------------
    oslInterlockedCount MouseFunction::acquire()
    {
        return osl_incrementInterlockedCount( &m_refCount );
    }

    //------------------------------------------------------------------------------------------------------------------
    oslInterlockedCount MouseFunction::release()
    {
        oslInterlockedCount newCount = osl_decrementInterlockedCount( &m_refCount );
        if ( newCount == 0 )
        {
            delete this;
            return 0;
        }
        return newCount;
    }

    //==================================================================================================================
    //= ColumnResize
    //==================================================================================================================
    //------------------------------------------------------------------------------------------------------------------
    FunctionResult ColumnResize::handleMouseMove( ITableControl& i_tableControl, MouseEvent const & i_event )
    {
        Point const aPoint = i_event.GetPosPixel();

        if ( m_nResizingColumn == COL_INVALID )
        {
            // if we hit a column divider, change the mosue pointer accordingly
            Pointer aNewPointer( POINTER_ARROW );
            TableCell const tableCell = i_tableControl.hitTest( aPoint );
            if ( ( tableCell.nRow == ROW_COL_HEADERS ) && ( tableCell.eArea == ColumnDivider ) )
            {
                aNewPointer = Pointer( POINTER_HSPLIT );
            }
            i_tableControl.setPointer( aNewPointer );

            return SkipFunction;    // TODO: is this correct?
        }

        ::Size const tableSize = i_tableControl.getTableSizePixel();

        // set proper pointer
        Pointer aNewPointer( POINTER_ARROW );
        ColumnMetrics const & columnMetrics( i_tableControl.getColumnMetrics( m_nResizingColumn ) );
        if  (   ( aPoint.X() > tableSize.Width() )
            ||  ( aPoint.X() < columnMetrics.nStartPixel )
            )
        {
            aNewPointer = Pointer( POINTER_NOTALLOWED );
        }
        else
        {
            aNewPointer = Pointer( POINTER_HSPLIT );
        }
        i_tableControl.setPointer( aNewPointer );

        // show tracking line
        i_tableControl.hideTracking();
        i_tableControl.showTracking(
            Rectangle(
                Point( aPoint.X(), 0 ),
                Size( 1, tableSize.Height() )
            ),
            SHOWTRACK_SPLIT | SHOWTRACK_WINDOW
        );

        (void)i_event;
        return ContinueFunction;
    }

    //------------------------------------------------------------------------------------------------------------------
    FunctionResult ColumnResize::handleMouseDown( ITableControl& i_tableControl, MouseEvent const & i_event )
    {
        if ( m_nResizingColumn != COL_INVALID )
        {
            OSL_ENSURE( false, "ColumnResize::handleMouseDown: suspicious: MouseButtonDown while still tracking?" );
            return ContinueFunction;
        }

        TableCell const tableCell( i_tableControl.hitTest( i_event.GetPosPixel() ) );
        if ( tableCell.nRow == ROW_COL_HEADERS )
        {
            if  (   ( tableCell.nColumn != COL_INVALID )
                &&  ( tableCell.eArea == ColumnDivider )
                )
            {
                m_nResizingColumn = tableCell.nColumn;
                i_tableControl.captureMouse();
                return ActivateFunction;
            }
        }

        return SkipFunction;
    }

    //------------------------------------------------------------------------------------------------------------------
    FunctionResult ColumnResize::handleMouseUp( ITableControl& i_tableControl, MouseEvent const & i_event )
    {
        if ( m_nResizingColumn == COL_INVALID )
            return SkipFunction;

        Point const aPoint = i_event.GetPosPixel();

        i_tableControl.hideTracking();
        PColumnModel const pColumn = i_tableControl.getModel()->getColumnModel( m_nResizingColumn );
        long const maxWidthLogical = pColumn->getMaxWidth();
        long const minWidthLogical = pColumn->getMinWidth();

        // new position of mouse 
        long const requestedEnd = aPoint.X();

        // old position of right border
        long const oldEnd = i_tableControl.getColumnMetrics( m_nResizingColumn ).nEndPixel;

        // position of left border if cursor in the to-be-resized column
        long const columnStart = i_tableControl.getColumnMetrics( m_nResizingColumn ).nStartPixel;
        long const requestedWidth = requestedEnd - columnStart;
            // TODO: this is not correct, strictly: It assumes that the mouse was pressed exactly on the "end" pos,
            // but for a while now, we have relaxed this, and allow clicking a few pixels aside, too

        if ( requestedEnd >= columnStart )
        {
            long requestedWidthLogical = i_tableControl.pixelWidthToAppFont( requestedWidth );
            // respect column width limits
            if ( oldEnd > requestedEnd )
            {
                // column has become smaller, check against minimum width
                if ( ( minWidthLogical != 0 ) && ( requestedWidthLogical < minWidthLogical ) )
                    requestedWidthLogical = minWidthLogical;
            }
            else if ( oldEnd < requestedEnd )
            {
                // column has become larger, check against max width
                if ( ( maxWidthLogical != 0 ) && ( requestedWidthLogical >= maxWidthLogical ) )
                    requestedWidthLogical = maxWidthLogical;
            }
            pColumn->setWidth( requestedWidthLogical );
            i_tableControl.invalidate( TableAreaAll );
        }

        i_tableControl.setPointer( Pointer() );
        i_tableControl.releaseMouse();

        m_nResizingColumn = COL_INVALID;
        return DeactivateFunction;
    }

    //==================================================================================================================
    //= RowSelection
    //==================================================================================================================
    //------------------------------------------------------------------------------------------------------------------
    FunctionResult RowSelection::handleMouseMove( ITableControl& i_tableControl, MouseEvent const & i_event )
    {
        OSL_UNUSED( i_tableControl );
        OSL_UNUSED( i_event );
        return SkipFunction;
    }

    //------------------------------------------------------------------------------------------------------------------
    FunctionResult RowSelection::handleMouseDown( ITableControl& i_tableControl, MouseEvent const & i_event )
    {
        bool handled = false;

        TableCell const tableCell( i_tableControl.hitTest( i_event.GetPosPixel() ) );
        if ( tableCell.nRow >= 0 )
        {
            bool bSetCursor = false;
            if ( i_tableControl.getSelEngine()->GetSelectionMode() == NO_SELECTION )
            {
                bSetCursor = true;
            }
            else
            {
                if ( !i_tableControl.isRowSelected( tableCell.nRow ) )
                {
                    handled = i_tableControl.getSelEngine()->SelMouseButtonDown( i_event );
                }
                else
                {
                    bSetCursor = true;
                }
            }

            if ( bSetCursor )
            {
                i_tableControl.activateCell( tableCell.nColumn, tableCell.nRow );
                handled = true;
            }
        }

        if ( handled )
            m_bActive = true;
        return handled ? ActivateFunction : SkipFunction;
    }

    //------------------------------------------------------------------------------------------------------------------
    FunctionResult RowSelection::handleMouseUp( ITableControl& i_tableControl, MouseEvent const & i_event )
    {
        TableCell const tableCell = i_tableControl.hitTest( i_event.GetPosPixel() );
        if ( tableCell.nRow >= 0 )
        {			
            if ( i_tableControl.getSelEngine()->GetSelectionMode() != NO_SELECTION )
            {
                i_tableControl.getSelEngine()->SelMouseButtonUp( i_event );
            }
        }
        if ( m_bActive )
        {
            m_bActive = false;
            return DeactivateFunction;
        }
        return SkipFunction;
    }

    //==================================================================================================================
    //= ColumnSortHandler
    //==================================================================================================================
    //------------------------------------------------------------------------------------------------------------------
    FunctionResult ColumnSortHandler::handleMouseMove( ITableControl& i_tableControl, MouseEvent const & i_event )
    {
        OSL_UNUSED( i_tableControl );
        OSL_UNUSED( i_event );
        return SkipFunction;
    }

    //------------------------------------------------------------------------------------------------------------------
    FunctionResult ColumnSortHandler::handleMouseDown( ITableControl& i_tableControl, MouseEvent const & i_event )
    {
        if ( m_nActiveColumn != COL_INVALID )
        {
            OSL_ENSURE( false, "ColumnSortHandler::handleMouseDown: called while already active - suspicious!" );
            return ContinueFunction;
        }

        if ( i_tableControl.getModel()->getSortAdapter() == NULL )
            // no sorting support at the model
            return SkipFunction;

        TableCell const tableCell( i_tableControl.hitTest( i_event.GetPosPixel() ) );
        if ( ( tableCell.nRow != ROW_COL_HEADERS ) || ( tableCell.nColumn < 0 ) )
            return SkipFunction;

        // TODO: ensure the column header is rendered in some special way, indicating its current state

        m_nActiveColumn = tableCell.nColumn;
        return ActivateFunction;
    }

    //------------------------------------------------------------------------------------------------------------------
    FunctionResult ColumnSortHandler::handleMouseUp( ITableControl& i_tableControl, MouseEvent const & i_event )
    {
        if ( m_nActiveColumn == COL_INVALID )
            return SkipFunction;

        TableCell const tableCell( i_tableControl.hitTest( i_event.GetPosPixel() ) );
        if ( ( tableCell.nRow == ROW_COL_HEADERS ) && ( tableCell.nColumn == m_nActiveColumn ) )
        {
            ITableDataSort* pSort = i_tableControl.getModel()->getSortAdapter();
            ENSURE_OR_RETURN( pSort != NULL, "ColumnSortHandler::handleMouseUp: somebody is mocking with us!", DeactivateFunction );
                // in handleMousButtonDown, the model claimed to have sort support ...

            ColumnSortDirection eSortDirection = ColumnSortAscending;
            ColumnSort const aCurrentSort = pSort->getCurrentSortOrder();
            if ( aCurrentSort.nColumnPos == m_nActiveColumn )
                // invert existing sort order
                eSortDirection = ( aCurrentSort.eSortDirection == ColumnSortAscending ) ? ColumnSortDescending : ColumnSortAscending;

            pSort->sortByColumn( m_nActiveColumn, eSortDirection );
        }

        m_nActiveColumn = COL_INVALID;
        return DeactivateFunction;
    }

//......................................................................................................................
} } // namespace svt::table
//......................................................................................................................
