/* -*- 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 <vcl/dockingarea.hxx>
#include <vcl/syswin.hxx>
#include <vcl/menu.hxx>
#include <vcl/settings.hxx>

#include <svdata.hxx>

#include <map>

class DockingAreaWindow::ImplData
{
public:
    ImplData();
    ~ImplData();

    WindowAlign meAlign;
};

DockingAreaWindow::ImplData::ImplData()
{
    meAlign = WINDOWALIGN_TOP;
}

DockingAreaWindow::ImplData::~ImplData()
{
}

static void ImplInitBackground( DockingAreaWindow* pThis )
{
    const StyleSettings rSetting = Application::GetSettings().GetStyleSettings();
    const BitmapEx& rPersonaBitmap = pThis->GetAlign() == WINDOWALIGN_TOP ? rSetting.GetPersonaHeader() :rSetting.GetPersonaFooter();
    if ( !rPersonaBitmap.IsEmpty() &&( pThis->GetAlign() == WINDOWALIGN_TOP|| pThis->GetAlign()==WINDOWALIGN_BOTTOM ) )
    {
        Wallpaper aWallpaper( rPersonaBitmap );
        if(pThis->GetAlign()==WINDOWALIGN_TOP )
            aWallpaper.SetStyle( WALLPAPER_TOPRIGHT );
        else
            aWallpaper.SetStyle( WALLPAPER_BOTTOMRIGHT );
        aWallpaper.SetColor( rSetting.GetWorkspaceColor() );

        // we need to shift the bitmap vertically so that it spans over the
        // menubar conveniently
        long nMenubarHeight = 0;
        SystemWindow *pSysWin = pThis->GetSystemWindow();
        if ( pSysWin && pSysWin->GetMenuBar() )
        {
            vcl::Window *pMenubarWin = pSysWin->GetMenuBar()->GetWindow();
            if ( pMenubarWin )
                nMenubarHeight = pMenubarWin->GetOutputHeightPixel();
        }
        aWallpaper.SetRect( Rectangle( Point( 0, -nMenubarHeight ), Size( pThis->GetOutputWidthPixel(), pThis->GetOutputHeightPixel() + nMenubarHeight ) ) );

        pThis->SetBackground( aWallpaper );
    }
    else if( !pThis->IsNativeControlSupported( CTRL_TOOLBAR, PART_ENTIRE_CONTROL ) )
    {
        Wallpaper aWallpaper;
        aWallpaper.SetStyle( WALLPAPER_APPLICATIONGRADIENT );
        pThis->SetBackground( aWallpaper );
    }
    else
        pThis->SetBackground( Wallpaper( pThis->GetSettings().GetStyleSettings().GetFaceColor() ) );
}

DockingAreaWindow::DockingAreaWindow( vcl::Window* pParent ) :
    Window( WINDOW_DOCKINGAREA )
{
    ImplInit( pParent, WB_CLIPCHILDREN|WB_3DLOOK, NULL );

    mpImplData = new ImplData;
    ImplInitBackground( this );
}

DockingAreaWindow::~DockingAreaWindow()
{
    delete mpImplData;
}

void DockingAreaWindow::DataChanged( const DataChangedEvent& rDCEvt )
{
    Window::DataChanged( rDCEvt );

    if ( (rDCEvt.GetType() == DataChangedEventType::SETTINGS) && (rDCEvt.GetFlags() & AllSettingsFlags::STYLE) )
    {
        ImplInitBackground( this );
        Invalidate();
    }
}

static void ImplInvalidateMenubar( DockingAreaWindow* pThis )
{
    // due to a possible comon gradient covering menubar and top dockingarea
    // the menubar must be repainted if the top dockingarea changes size or visibility
    if( ImplGetSVData()->maNWFData.mbMenuBarDockingAreaCommonBG &&
        (pThis->GetAlign() == WINDOWALIGN_TOP)
        && pThis->IsNativeControlSupported( CTRL_TOOLBAR, PART_ENTIRE_CONTROL )
        && pThis->IsNativeControlSupported( CTRL_MENUBAR, PART_ENTIRE_CONTROL ) )
    {
        SystemWindow *pSysWin = pThis->GetSystemWindow();
        if( pSysWin && pSysWin->GetMenuBar() )
        {
            vcl::Window *pMenubarWin = pSysWin->GetMenuBar()->GetWindow();
            if( pMenubarWin )
                pMenubarWin->Invalidate();
        }
    }
}

void DockingAreaWindow::StateChanged( StateChangedType nType )
{
    Window::StateChanged( nType );

    if ( nType == StateChangedType::VISIBLE )
        ImplInvalidateMenubar( this );
}

bool DockingAreaWindow::IsHorizontal() const
{
    return ( mpImplData->meAlign == WINDOWALIGN_TOP || mpImplData->meAlign == WINDOWALIGN_BOTTOM );
}

void DockingAreaWindow::SetAlign( WindowAlign eNewAlign )
{
    if( eNewAlign != mpImplData->meAlign )
    {
        mpImplData->meAlign = eNewAlign;
        ImplInitBackground( this );
        Invalidate();
    }
}

WindowAlign DockingAreaWindow::GetAlign() const
{
    return mpImplData->meAlign;
}

void DockingAreaWindow::Paint( const Rectangle& )
{
    EnableNativeWidget( true ); // only required because the toolkit curently switches this flag off
    if( IsNativeControlSupported( CTRL_TOOLBAR, PART_ENTIRE_CONTROL ) )
    {
        ToolbarValue        aControlValue;
        const StyleSettings rSetting = Application::GetSettings().GetStyleSettings();

        if( GetAlign() == WINDOWALIGN_TOP && ImplGetSVData()->maNWFData.mbMenuBarDockingAreaCommonBG )
        {
            // give NWF a hint that this dockingarea is adjacent to the menubar
            // useful for special gradient effects that should cover both windows
            aControlValue.mbIsTopDockingArea = true;
        }

        ControlState        nState = ControlState::ENABLED;
        const bool isFooter = GetAlign() == WINDOWALIGN_BOTTOM && !rSetting.GetPersonaFooter().IsEmpty();

        if (( GetAlign() == WINDOWALIGN_TOP && !rSetting.GetPersonaHeader().IsEmpty() ) || isFooter  )
            Erase();
        else if ( !ImplGetSVData()->maNWFData.mbDockingAreaSeparateTB )
        {
            // draw a single toolbar background covering the whole docking area
            Point tmp;
            Rectangle aCtrlRegion( tmp, GetOutputSizePixel() );

            DrawNativeControl( CTRL_TOOLBAR, IsHorizontal() ? PART_DRAW_BACKGROUND_HORZ : PART_DRAW_BACKGROUND_VERT,
                               aCtrlRegion, nState, aControlValue, OUString() );

            if( !ImplGetSVData()->maNWFData.mbDockingAreaAvoidTBFrames )
            {
                // each toolbar gets a thin border to better recognize its borders on the homogeneous docking area
                sal_uInt16 nChildren = GetChildCount();
                for( sal_uInt16 n = 0; n < nChildren; n++ )
                {
                    vcl::Window* pChild = GetChild( n );
                    if ( pChild->IsVisible() )
                    {
                        Point aPos = pChild->GetPosPixel();
                        Size aSize = pChild->GetSizePixel();
                        Rectangle aRect( aPos, aSize );

                        SetLineColor( GetSettings().GetStyleSettings().GetLightColor() );
                        DrawLine( aRect.TopLeft(), aRect.TopRight() );
                        DrawLine( aRect.TopLeft(), aRect.BottomLeft() );

                        SetLineColor( GetSettings().GetStyleSettings().GetSeparatorColor() );
                        DrawLine( aRect.BottomLeft(), aRect.BottomRight() );
                        DrawLine( aRect.TopRight(), aRect.BottomRight() );
                    }
                }
            }
        }
        else
        {
            // create map to find toolbar lines
            Size aOutSz = GetOutputSizePixel();
            std::map< int, int > ranges;
            sal_uInt16 nChildren = GetChildCount();
            for( sal_uInt16 n = 0; n < nChildren; n++ )
            {
                vcl::Window* pChild = GetChild( n );
                Point aPos = pChild->GetPosPixel();
                Size aSize = pChild->GetSizePixel();
                if( IsHorizontal() )
                    ranges[ aPos.Y() ] = aSize.Height();
                else
                    ranges[ aPos.X() ] = aSize.Width();
            }

            // draw multiple toolbar backgrounds, i.e., one for each toolbar line
            for( std::map<int,int>::const_iterator it = ranges.begin(); it != ranges.end(); ++it )
            {
                Rectangle aTBRect;
                if( IsHorizontal() )
                {
                    aTBRect.Left()      = 0;
                    aTBRect.Right()     = aOutSz.Width() - 1;
                    aTBRect.Top()       = it->first;
                    aTBRect.Bottom()    = it->first + it->second - 1;
                }
                else
                {
                    aTBRect.Left()      = it->first;
                    aTBRect.Right()     = it->first + it->second - 1;
                    aTBRect.Top()       = 0;
                    aTBRect.Bottom()    = aOutSz.Height() - 1;
                }
                DrawNativeControl( CTRL_TOOLBAR, IsHorizontal() ? PART_DRAW_BACKGROUND_HORZ : PART_DRAW_BACKGROUND_VERT,
                                   aTBRect, nState, aControlValue, OUString() );
            }
        }
    }
}

void DockingAreaWindow::Resize()
{
    ImplInitBackground( this );
    ImplInvalidateMenubar( this );
    if( IsNativeControlSupported( CTRL_TOOLBAR, PART_ENTIRE_CONTROL ) )
        Invalidate();
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */