/* -*- 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 "contwnd.hxx"

#include <svx/svdpage.hxx>

#include <svx/svdopath.hxx>

#include <svx/xfillit0.hxx>

#include <svx/xfltrit.hxx>

#include <svx/xflclit.hxx>

#include <basegfx/polygon/b2dpolypolygontools.hxx>

#include <svx/sdrpaintwindow.hxx>

#include <vcl/ptrstyle.hxx>

using namespace css;

#define TRANSCOL COL_WHITE

ContourWindow::ContourWindow(weld::Dialog* pDialog)

    : GraphCtrl(pDialog)

    , aWorkRect(0, 0, 0, 0)

    , bPipetteMode(false)

    , bWorkplaceMode(false)

    , bClickValid(false)

{

}

void ContourWindow::SetPolyPolygon(const tools::PolyPolygon& rPolyPoly)

{

    SdrPage* pPage = mpModel->GetPage(0);

    const sal_uInt16 nPolyCount = rPolyPoly.Count();

    // First delete all drawing objects

    aPolyPoly = rPolyPoly;

    // To avoid to have destroyed objects which are still selected, it is necessary to deselect

    // them first (!)

    mpView->UnmarkAllObj();

    // clear SdrObjects with broadcasting

    pPage->ClearSdrObjList();

    for (sal_uInt16 i = 0; i < nPolyCount; i++)

    {

        basegfx::B2DPolyPolygon aPolyPolygon;

        aPolyPolygon.append(aPolyPoly[ i ].getB2DPolygon());

        rtl::Reference<SdrPathObj> pPathObj = new SdrPathObj(

            *mpModel,

            SdrObjKind::PathFill,

            std::move(aPolyPolygon));

        SfxItemSet aSet(mpModel->GetItemPool());

        aSet.Put(XFillStyleItem(drawing::FillStyle_SOLID));

        aSet.Put(XFillColorItem(u""_ustr, TRANSCOL));

        aSet.Put(XFillTransparenceItem(50) );

        pPathObj->SetMergedItemSetAndBroadcast(aSet);

        pPage->InsertObject( pPathObj.get() );

    }

    if (nPolyCount)

    {

        mpView->MarkAll();

        mpView->CombineMarkedObjects(false);

    }

    mpModel->SetChanged(false);

}

const tools::PolyPolygon& ContourWindow::GetPolyPolygon()

{

    if ( mpModel->IsChanged() )

    {

        SdrPage* pPage = mpModel->GetPage( 0 );

        aPolyPoly = tools::PolyPolygon();

        if ( pPage && pPage->GetObjCount() )

        {

            SdrPathObj* pPathObj = static_cast<SdrPathObj*>(pPage->GetObj(0));

            // Not sure if subdivision is needed for ContourWindow, but maybe it cannot handle

            // curves at all. Keeping subdivision here for security

            const basegfx::B2DPolyPolygon aB2DPolyPolygon(basegfx::utils::adaptiveSubdivideByAngle(pPathObj->GetPathPoly()));

            aPolyPoly = tools::PolyPolygon(aB2DPolyPolygon);

        }

        mpModel->SetChanged( false );

    }

    return aPolyPoly;

}

void ContourWindow::InitSdrModel()

{

    GraphCtrl::InitSdrModel();

    SfxItemSet aSet( mpModel->GetItemPool() );

    aSet.Put( XFillColorItem( u""_ustr, TRANSCOL ) );

    aSet.Put( XFillTransparenceItem( 50 ) );

    mpView->SetAttributes( aSet );

    mpView->SetFrameDragSingles();

}

void ContourWindow::SdrObjCreated( const SdrObject&  )

{

    mpView->MarkAll();

    mpView->CombineMarkedObjects( false );

}

bool ContourWindow::IsContourChanged() const

{

    SdrPage*    pPage = mpModel->GetPage( 0 );

    bool        bRet = false;

    if ( pPage && pPage->GetObjCount() )

        bRet = static_cast<SdrPathObj*>( pPage->GetObj( 0 ) )->GetPathPoly().count() && mpModel->IsChanged();

    return bRet;

}

bool ContourWindow::MouseButtonDown( const MouseEvent& rMEvt )

{

    if ( bWorkplaceMode )

    {

        const Point aLogPt(GetDrawingArea()->get_ref_device().PixelToLogic(rMEvt.GetPosPixel()));

        SetPolyPolygon( tools::PolyPolygon() );

        aWorkRect = tools::Rectangle( aLogPt, aLogPt );

        Invalidate(tools::Rectangle(Point(), GetGraphicSize()));

        SetEditMode( true );

    }

    if (!bPipetteMode)

        return GraphCtrl::MouseButtonDown( rMEvt );

    return true;

}

bool ContourWindow::MouseMove( const MouseEvent& rMEvt )

{

    bClickValid = false;

    if ( bPipetteMode )

    {

        const Point aLogPt( GetDrawingArea()->get_ref_device().PixelToLogic( rMEvt.GetPosPixel() ) );

        aPipetteColor = GetDrawingArea()->get_ref_device().GetPixel( aLogPt );

        weld::CustomWidgetController::MouseMove( rMEvt );

        if ( aPipetteLink.IsSet() && tools::Rectangle( Point(), GetGraphicSize() ).Contains( aLogPt ) )

        {

            SetPointer( PointerStyle::RefHand );

            aPipetteLink.Call( *this );

        }

        return true;

    }

    return GraphCtrl::MouseMove( rMEvt );

}

bool ContourWindow::MouseButtonUp(const MouseEvent& rMEvt)

{

    const tools::Rectangle aGraphRect( Point(), GetGraphicSize() );

    const Point     aLogPt( GetDrawingArea()->get_ref_device().PixelToLogic( rMEvt.GetPosPixel() ) );

    bClickValid = aGraphRect.Contains( aLogPt );

    ReleaseMouse();

    if ( bPipetteMode )

    {

        weld::CustomWidgetController::MouseButtonUp( rMEvt );

        aPipetteClickLink.Call( *this );

        return true;

    }

    else if ( bWorkplaceMode )

    {

        GraphCtrl::MouseButtonUp( rMEvt );

        aWorkRect.SetRight( aLogPt.X() );

        aWorkRect.SetBottom( aLogPt.Y() );

        aWorkRect.Intersection( aGraphRect );

        aWorkRect.Normalize();

        if ( aWorkRect.Left() != aWorkRect.Right() && aWorkRect.Top() != aWorkRect.Bottom() )

        {

            tools::PolyPolygon _aPolyPoly( GetPolyPolygon() );

            _aPolyPoly.Clip( aWorkRect );

            SetPolyPolygon( _aPolyPoly );

            mpView->SetWorkArea( aWorkRect );

        }

        else

            mpView->SetWorkArea( aGraphRect );

        Invalidate( aGraphRect );

        aWorkplaceClickLink.Call( *this );

        return false;

    }

    return GraphCtrl::MouseButtonUp( rMEvt );

}

void ContourWindow::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect)

{

    // #i75482#

    // encapsulate the redraw using Begin/End and use the returned

    // data to get the target output device (e.g. when pre-rendering)

    SdrPaintWindow* pPaintWindow = mpView->BeginCompleteRedraw(&rRenderContext);

    pPaintWindow->SetOutputToWindow(true);

    OutputDevice& rTarget = pPaintWindow->GetTargetOutputDevice();

    const Graphic& rGraphic = GetGraphic();

    rTarget.Push(vcl::PushFlags::LINECOLOR |vcl::PushFlags::FILLCOLOR);

    rTarget.SetLineColor(COL_BLACK);

    rTarget.SetFillColor(COL_WHITE);

    rTarget.DrawRect( tools::Rectangle( Point(), GetGraphicSize() ) );

    rTarget.Pop();

    if (rGraphic.GetType() != GraphicType::NONE)

        rGraphic.Draw(rTarget, Point(), GetGraphicSize());

    if (aWorkRect.Left() != aWorkRect.Right() && aWorkRect.Top() != aWorkRect.Bottom())

    {

        tools::PolyPolygon _aPolyPoly(2);

        rTarget.Push(vcl::PushFlags::FILLCOLOR);

        _aPolyPoly.Insert(tools::Polygon(tools::Rectangle(Point(), GetGraphicSize())));

        _aPolyPoly.Insert(tools::Polygon(aWorkRect));

        rTarget.SetFillColor(COL_LIGHTRED);

        rTarget.DrawTransparent(_aPolyPoly, 50);

        rTarget.Pop();

    }

    // #i75482#

    const vcl::Region aRepaintRegion(rRect);

    mpView->DoCompleteRedraw(*pPaintWindow, aRepaintRegion);

    mpView->EndCompleteRedraw(*pPaintWindow, true);

}

void ContourWindow::SetDrawingArea(weld::DrawingArea* pDrawingArea)

{

    GraphCtrl::SetDrawingArea(pDrawingArea);

    Size aSize(pDrawingArea->get_ref_device().LogicToPixel(Size(270, 170), MapMode(MapUnit::MapAppFont)));

    pDrawingArea->set_size_request(aSize.Width(), aSize.Height());

    SetOutputSizePixel(aSize);

    SetSdrMode(true);

}

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