/* -*- 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 <utility>
#include <vcl/settings.hxx>
#include "PresenterToolBar.hxx"

#include "PresenterBitmapContainer.hxx"
#include "PresenterCanvasHelper.hxx"
#include "PresenterGeometryHelper.hxx"
#include "PresenterPaintManager.hxx"
#include "PresenterTimer.hxx"
#include "PresenterWindowManager.hxx"
#include <DrawController.hxx>

#include <cppuhelper/compbase.hxx>
#include <com/sun/star/awt/XWindowPeer.hpp>
#include <com/sun/star/drawing/framework/XConfigurationController.hpp>
#include <com/sun/star/drawing/framework/XPane.hpp>
#include <com/sun/star/geometry/AffineMatrix2D.hpp>
#include <com/sun/star/rendering/CompositeOperation.hpp>
#include <com/sun/star/rendering/RenderState.hpp>
#include <com/sun/star/rendering/TextDirection.hpp>
#include <com/sun/star/rendering/ViewState.hpp>
#include <com/sun/star/rendering/XSpriteCanvas.hpp>
#include <com/sun/star/util/Color.hpp>
#include <rtl/ustrbuf.hxx>

using namespace ::com::sun::star;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::drawing::framework;

namespace sdext::presenter {

const sal_Int32 gnGapSize (20);

namespace {

    class Text
    {
    public:
        Text();
        Text (
            OUString sText,
            PresenterTheme::SharedFontDescriptor pFont);

        void SetText (const OUString& rsText);
        const OUString& GetText() const;
        const PresenterTheme::SharedFontDescriptor& GetFont() const;

        void Paint (
            const Reference<rendering::XCanvas>& rxCanvas,
            const rendering::ViewState& rViewState,
            const awt::Rectangle& rBoundingBox);

        geometry::RealRectangle2D GetBoundingBox (
            const Reference<rendering::XCanvas>& rxCanvas);

    private:
        OUString msText;
        PresenterTheme::SharedFontDescriptor mpFont;
    };

    class ElementMode
    {
    public:
        ElementMode();
        ElementMode(const ElementMode&) = delete;
        ElementMode& operator=(const ElementMode&) = delete;

        SharedBitmapDescriptor mpIcon;
        OUString msAction;
        Text maText;

        void ReadElementMode (
            const Reference<beans::XPropertySet>& rxProperties,
            const OUString& rsModeName,
            std::shared_ptr<ElementMode> const & rpDefaultMode,
            ::sdext::presenter::PresenterToolBar::Context const & rContext);
    };
    typedef std::shared_ptr<ElementMode> SharedElementMode;

}  // end of anonymous namespace

class PresenterToolBar::Context
{
public:
    Context() = default;
    Context(const Context&) = delete;
    Context& operator=(const Context&) = delete;
    Reference<drawing::XPresenterHelper> mxPresenterHelper;
    css::uno::Reference<css::rendering::XCanvas> mxCanvas;
};

//===== PresenterToolBar::Element =============================================

namespace {
    typedef cppu::WeakComponentImplHelper<
        css::document::XEventListener,
        css::frame::XStatusListener
        > ElementInterfaceBase;

    class Element
        : private ::cppu::BaseMutex,
          public ElementInterfaceBase
    {
    public:
        explicit Element (::rtl::Reference<PresenterToolBar> pToolBar);
        Element(const Element&) = delete;
        Element& operator=(const Element&) = delete;

        virtual void SAL_CALL disposing() override;

        virtual void SetModes (
            const SharedElementMode& rpNormalMode,
            const SharedElementMode& rpMouseOverMode,
            const SharedElementMode& rpSelectedMode,
            const SharedElementMode& rpDisabledMode,
            const SharedElementMode& rpMouseOverSelectedMode);
        void CurrentSlideHasChanged();
        void SetLocation (const awt::Point& rLocation);
        void SetSize (const geometry::RealSize2D& rSize);
        virtual void Paint (
            const Reference<rendering::XCanvas>& rxCanvas,
            const rendering::ViewState& rViewState) = 0;
        awt::Size const & GetBoundingSize (
            const Reference<rendering::XCanvas>& rxCanvas);
        awt::Rectangle GetBoundingBox() const;
        virtual bool SetState (const bool bIsOver, const bool bIsPressed);
        void Invalidate (const bool bSynchronous);
        bool IsOutside (const awt::Rectangle& rBox);
        virtual bool IsFilling() const;
        void UpdateState();

        // lang::XEventListener

        virtual void SAL_CALL disposing (const css::lang::EventObject& rEvent) override;

        // document::XEventListener

        virtual void SAL_CALL notifyEvent (const css::document::EventObject& rEvent) override;

        // frame::XStatusListener

        virtual void SAL_CALL statusChanged (const css::frame::FeatureStateEvent& rEvent) override;

    protected:
        ::rtl::Reference<PresenterToolBar> mpToolBar;
        awt::Point maLocation;
        awt::Size maSize;
        SharedElementMode mpNormal;
        SharedElementMode mpMouseOver;
        SharedElementMode mpSelected;
        SharedElementMode mpDisabled;
        SharedElementMode mpMouseOverSelected;
        SharedElementMode mpMode;
        bool mbIsOver;
        bool mbIsPressed;
        bool mbIsSelected;

        virtual awt::Size CreateBoundingSize (
            const Reference<rendering::XCanvas>& rxCanvas) = 0;

        bool IsEnabled() const { return mbIsEnabled;}
    private:
        bool mbIsEnabled;
    };

} // end of anonymous namespace

class PresenterToolBar::ElementContainerPart
    : public ::std::vector<rtl::Reference<Element> >
{
};

//===== Button ================================================================

namespace {

    class Button : public Element
    {
    public:
        static ::rtl::Reference<Element> Create (
            const ::rtl::Reference<PresenterToolBar>& rpToolBar);

        virtual void SAL_CALL disposing() override;

        virtual void Paint (
            const Reference<rendering::XCanvas>& rxCanvas,
            const rendering::ViewState& rViewState) override;

        // lang::XEventListener

        virtual void SAL_CALL disposing (const css::lang::EventObject& rEvent) override;

    protected:
        virtual awt::Size CreateBoundingSize (
            const Reference<rendering::XCanvas>& rxCanvas) override;

    private:
        bool mbIsListenerRegistered;

        Button (const ::rtl::Reference<PresenterToolBar>& rpToolBar);
        void Initialize();
        void PaintIcon (
            const Reference<rendering::XCanvas>& rxCanvas,
            const sal_Int32 nTextHeight,
            const rendering::ViewState& rViewState);
        PresenterBitmapDescriptor::Mode GetMode() const;
    };

//===== Label =================================================================

    class Label : public Element
    {
    public:
        explicit Label (const ::rtl::Reference<PresenterToolBar>& rpToolBar);

        void SetText (const OUString& rsText);
        virtual void Paint (
            const Reference<rendering::XCanvas>& rxCanvas,
            const rendering::ViewState& rViewState) override;
        virtual bool SetState (const bool bIsOver, const bool bIsPressed) override;

    protected:
        virtual awt::Size CreateBoundingSize (
            const Reference<rendering::XCanvas>& rxCanvas) override;
    };

// Some specialized controls.

    class TimeFormatter
    {
    public:
        static OUString FormatTime (const oslDateTime& rTime);
    };

    class TimeLabel : public Label
    {
    public:
        void ConnectToTimer();
        virtual void TimeHasChanged (const oslDateTime& rCurrentTime) = 0;
    protected:
        explicit TimeLabel(const ::rtl::Reference<PresenterToolBar>& rpToolBar);
        using Element::disposing;
        virtual void SAL_CALL disposing() override;
    private:
        class Listener : public PresenterClockTimer::Listener
        {
        public:
            explicit Listener (::rtl::Reference<TimeLabel> xLabel)
                : mxLabel(std::move(xLabel)) {}
            virtual ~Listener() {}
            virtual void TimeHasChanged (const oslDateTime& rCurrentTime) override
            { if (mxLabel.is()) mxLabel->TimeHasChanged(rCurrentTime); }
        private:
            ::rtl::Reference<TimeLabel> mxLabel;
        };
        std::shared_ptr<PresenterClockTimer::Listener> mpListener;
    };

    class CurrentTimeLabel : public TimeLabel
    {
    public:
        static ::rtl::Reference<Element> Create (
            const ::rtl::Reference<PresenterToolBar>& rpToolBar);
        virtual void SetModes (
            const SharedElementMode& rpNormalMode,
            const SharedElementMode& rpMouseOverMode,
            const SharedElementMode& rpSelectedMode,
            const SharedElementMode& rpDisabledMode,
            const SharedElementMode& rpMouseOverSelectedMode) override;
    private:
        CurrentTimeLabel (const ::rtl::Reference<PresenterToolBar>& rpToolBar);
        virtual ~CurrentTimeLabel() override;
        virtual void TimeHasChanged (const oslDateTime& rCurrentTime) override;
    };

    class PresentationTimeLabel : public TimeLabel, public IPresentationTime
    {
    public:
        static ::rtl::Reference<Element> Create (
            const ::rtl::Reference<PresenterToolBar>& rpToolBar);
        virtual void SetModes (
            const SharedElementMode& rpNormalMode,
            const SharedElementMode& rpMouseOverMode,
            const SharedElementMode& rpSelectedMode,
            const SharedElementMode& rpDisabledMode,
            const SharedElementMode& rpMouseOverSelectedMode) override;
        virtual void restart() override;
        virtual bool isPaused() override;
        virtual void setPauseStatus(const bool pauseStatus) override;
        const TimeValue& getPauseTimeValue() const;
        void setPauseTimeValue(const TimeValue pauseTime);
    private:
        TimeValue maStartTimeValue;
        TimeValue pauseTimeValue;
        PresentationTimeLabel (const ::rtl::Reference<PresenterToolBar>& rpToolBar);
        bool paused;
        virtual ~PresentationTimeLabel() override;
        virtual void TimeHasChanged (const oslDateTime& rCurrentTime) override;
    };

    class VerticalSeparator : public Element
    {
    public:
        explicit VerticalSeparator (const ::rtl::Reference<PresenterToolBar>& rpToolBar);
        virtual void Paint (
            const Reference<rendering::XCanvas>& rxCanvas,
            const rendering::ViewState& rViewState) override;
        virtual bool IsFilling() const override;

    protected:
        virtual awt::Size CreateBoundingSize (
            const Reference<rendering::XCanvas>& rxCanvas) override;
    };

    class HorizontalSeparator : public Element
    {
    public:
        explicit HorizontalSeparator (const ::rtl::Reference<PresenterToolBar>& rpToolBar);
        virtual void Paint (
            const Reference<rendering::XCanvas>& rxCanvas,
            const rendering::ViewState& rViewState) override;
        virtual bool IsFilling() const override;

    protected:
        virtual awt::Size CreateBoundingSize (
            const Reference<rendering::XCanvas>& rxCanvas) override;
    };
} // end of anonymous namespace

//===== PresenterToolBar ======================================================

PresenterToolBar::PresenterToolBar (
    const Reference<XComponentContext>& rxContext,
    css::uno::Reference<css::awt::XWindow> xWindow,
    css::uno::Reference<css::rendering::XCanvas> xCanvas,
    ::rtl::Reference<PresenterController> pPresenterController,
    const Anchor eAnchor)
    : PresenterToolBarInterfaceBase(m_aMutex),
      mxComponentContext(rxContext),
      mxWindow(std::move(xWindow)),
      mxCanvas(std::move(xCanvas)),
      mpPresenterController(std::move(pPresenterController)),
      mbIsLayoutPending(false),
      meAnchor(eAnchor)
{
}

void PresenterToolBar::Initialize (
    const OUString& rsConfigurationPath)
{
    try
    {
        CreateControls(rsConfigurationPath);

        if (mxWindow.is())
        {
            mxWindow->addWindowListener(this);
            mxWindow->addPaintListener(this);
            mxWindow->addMouseListener(this);
            mxWindow->addMouseMotionListener(this);

            Reference<awt::XWindowPeer> xPeer (mxWindow, UNO_QUERY);
            if (xPeer.is())
                xPeer->setBackground(util::Color(0xff000000));

            mxWindow->setVisible(true);
        }

        mxSlideShowController = mpPresenterController->GetSlideShowController();
        UpdateSlideNumber();
        mbIsLayoutPending = true;
    }
    catch (RuntimeException&)
    {
        mpCurrentContainerPart.reset();
        maElementContainer.clear();
        throw;
    }
}

PresenterToolBar::~PresenterToolBar()
{
}

void SAL_CALL PresenterToolBar::disposing()
{
    if (mxWindow.is())
    {
        mxWindow->removeWindowListener(this);
        mxWindow->removePaintListener(this);
        mxWindow->removeMouseListener(this);
        mxWindow->removeMouseMotionListener(this);
        mxWindow = nullptr;
    }

    // Dispose tool bar elements.
    for (const auto& rxPart : maElementContainer)
    {
        OSL_ASSERT(rxPart != nullptr);
        for (const rtl::Reference<Element>& pElement : *rxPart)
        {
            if (pElement)
            {
                Reference<lang::XComponent> xComponent = pElement;
                if (xComponent.is())
                    xComponent->dispose();
            }
        }
    }

    mpCurrentContainerPart.reset();
    maElementContainer.clear();
}

void PresenterToolBar::InvalidateArea (
    const awt::Rectangle& rRepaintBox,
    const bool bSynchronous)
{
    std::shared_ptr<PresenterPaintManager> xManager(mpPresenterController->GetPaintManager());
    if (!xManager)
        return;
    xManager->Invalidate(
        mxWindow,
        rRepaintBox,
        bSynchronous);
}

void PresenterToolBar::RequestLayout()
{
    mbIsLayoutPending = true;

    std::shared_ptr<PresenterPaintManager> xManager(mpPresenterController->GetPaintManager());
    if (!xManager)
        return;

    xManager->Invalidate(mxWindow);
}

geometry::RealSize2D const & PresenterToolBar::GetMinimalSize()
{
    if (mbIsLayoutPending)
        Layout(mxCanvas);
    return maMinimalSize;
}

const ::rtl::Reference<PresenterController>& PresenterToolBar::GetPresenterController() const
{
    return mpPresenterController;
}

const Reference<XComponentContext>& PresenterToolBar::GetComponentContext() const
{
    return mxComponentContext;
}

//-----  lang::XEventListener -------------------------------------------------

void SAL_CALL PresenterToolBar::disposing (const lang::EventObject& rEventObject)
{
    if (rEventObject.Source == mxWindow)
        mxWindow = nullptr;
}

//----- XWindowListener -------------------------------------------------------

void SAL_CALL PresenterToolBar::windowResized (const awt::WindowEvent&)
{
    mbIsLayoutPending = true;
}

void SAL_CALL PresenterToolBar::windowMoved (const awt::WindowEvent&) {}

void SAL_CALL PresenterToolBar::windowShown (const lang::EventObject&)
{
    mbIsLayoutPending = true;
}

void SAL_CALL PresenterToolBar::windowHidden (const lang::EventObject&) {}

//----- XPaintListener --------------------------------------------------------
void SAL_CALL PresenterToolBar::windowPaint (const css::awt::PaintEvent& rEvent)
{
    if ( ! mxCanvas.is())
        return;

    if ( ! mbIsPresenterViewActive)
        return;

    const rendering::ViewState aViewState (
        geometry::AffineMatrix2D(1,0,0, 0,1,0),
        PresenterGeometryHelper::CreatePolygon(rEvent.UpdateRect, mxCanvas->getDevice()));

    if (mbIsLayoutPending)
        Layout(mxCanvas);

    Paint(rEvent.UpdateRect, aViewState);

    // Make the back buffer visible.
    Reference<rendering::XSpriteCanvas> xSpriteCanvas (mxCanvas, UNO_QUERY);
    if (xSpriteCanvas.is())
        xSpriteCanvas->updateScreen(false);
}

//----- XMouseListener --------------------------------------------------------
void SAL_CALL PresenterToolBar::mousePressed (const css::awt::MouseEvent& rEvent)
{
        ThrowIfDisposed();
        CheckMouseOver(rEvent, true, true);
}

void SAL_CALL PresenterToolBar::mouseReleased (const css::awt::MouseEvent& rEvent)
{
        ThrowIfDisposed();
        CheckMouseOver(rEvent, true);
}

void SAL_CALL PresenterToolBar::mouseEntered (const css::awt::MouseEvent& rEvent)
{
        ThrowIfDisposed();
        CheckMouseOver(rEvent, true);
}

void SAL_CALL PresenterToolBar::mouseExited (const css::awt::MouseEvent& rEvent)
{
        ThrowIfDisposed();
        CheckMouseOver(rEvent, false);
 }

//----- XMouseMotionListener --------------------------------------------------

void SAL_CALL PresenterToolBar::mouseMoved (const css::awt::MouseEvent& rEvent)
{
        ThrowIfDisposed();
        CheckMouseOver(rEvent, true);
 }

void SAL_CALL PresenterToolBar::mouseDragged (const css::awt::MouseEvent&)
{
    ThrowIfDisposed();
}

//----- XDrawView -------------------------------------------------------------

void SAL_CALL PresenterToolBar::setCurrentPage (const Reference<drawing::XDrawPage>& rxSlide)
{
    if (rxSlide != mxCurrentSlide)
    {
        mxCurrentSlide = rxSlide;
        UpdateSlideNumber();
    }
}

Reference<drawing::XDrawPage> SAL_CALL PresenterToolBar::getCurrentPage()
{
    return mxCurrentSlide;
}


void PresenterToolBar::CreateControls (
    const OUString& rsConfigurationPath)
{
    if ( ! mxWindow.is())
        return;

    // Expand the macro in the bitmap file names.
    PresenterConfigurationAccess aConfiguration (
        mxComponentContext,
        u"/org.openoffice.Office.PresenterScreen/"_ustr,
        PresenterConfigurationAccess::READ_ONLY);

    mpCurrentContainerPart = std::make_shared<ElementContainerPart>();
    maElementContainer.clear();
    maElementContainer.push_back(mpCurrentContainerPart);

    Reference<container::XHierarchicalNameAccess> xToolBarNode (
        aConfiguration.GetConfigurationNode(rsConfigurationPath),
        UNO_QUERY);
    if (!xToolBarNode.is())
        return;

    Reference<container::XNameAccess> xEntries (
        PresenterConfigurationAccess::GetConfigurationNode(xToolBarNode, u"Entries"_ustr),
        UNO_QUERY);
    Context aContext;
    aContext.mxPresenterHelper = mpPresenterController->GetPresenterHelper();
    aContext.mxCanvas = mxCanvas;
    if (xEntries.is()
        && aContext.mxPresenterHelper.is()
        && aContext.mxCanvas.is())
    {
        PresenterConfigurationAccess::ForAll(
            xEntries,
            [this, &aContext] (OUString const&, uno::Reference<beans::XPropertySet> const& xProps)
            {
                return this->ProcessEntry(xProps, aContext);
            });
    }
}

void PresenterToolBar::ProcessEntry (
    const Reference<beans::XPropertySet>& rxProperties,
    Context const & rContext)
{
    if ( ! rxProperties.is())
        return;

    // Type has to be present.
    OUString sType;
    if ( ! (PresenterConfigurationAccess::GetProperty(rxProperties, u"Type"_ustr) >>= sType))
        return;

    // Read mode specific values.
    SharedElementMode pNormalMode  = std::make_shared<ElementMode>();
    SharedElementMode pMouseOverMode = std::make_shared<ElementMode>();
    SharedElementMode pSelectedMode = std::make_shared<ElementMode>();
    SharedElementMode pDisabledMode = std::make_shared<ElementMode>();
    SharedElementMode pMouseOverSelectedMode = std::make_shared<ElementMode>();
    pNormalMode->ReadElementMode(rxProperties, u"Normal"_ustr, pNormalMode, rContext);
    pMouseOverMode->ReadElementMode(rxProperties, u"MouseOver"_ustr, pNormalMode, rContext);
    pSelectedMode->ReadElementMode(rxProperties, u"Selected"_ustr, pNormalMode, rContext);
    pDisabledMode->ReadElementMode(rxProperties, u"Disabled"_ustr, pNormalMode, rContext);
    pMouseOverSelectedMode->ReadElementMode(rxProperties, u"MouseOverSelected"_ustr, pSelectedMode, rContext);

    // Create new element.
    ::rtl::Reference<Element> pElement;
    if ( sType == "Button" )
        pElement = Button::Create(this);
    else if ( sType == "CurrentTimeLabel" )
        pElement = CurrentTimeLabel::Create(this);
    else if ( sType == "PresentationTimeLabel" )
        pElement = PresentationTimeLabel::Create(this);
    else if ( sType == "VerticalSeparator" )
        pElement.set(new VerticalSeparator(this));
    else if ( sType == "HorizontalSeparator" )
        pElement.set(new HorizontalSeparator(this));
    else if ( sType == "Label" )
        pElement.set(new Label(this));
    else if ( sType == "ChangeOrientation" )
    {
        mpCurrentContainerPart = std::make_shared<ElementContainerPart>();
        maElementContainer.push_back(mpCurrentContainerPart);
        return;
    }
    if (pElement.is())
    {
        pElement->SetModes( pNormalMode, pMouseOverMode, pSelectedMode, pDisabledMode, pMouseOverSelectedMode);
        pElement->UpdateState();
        if (mpCurrentContainerPart)
            mpCurrentContainerPart->push_back(pElement);
    }
}

void PresenterToolBar::Layout (
    const Reference<rendering::XCanvas>& rxCanvas)
{
    if (maElementContainer.empty())
        return;

    mbIsLayoutPending = false;

    const awt::Rectangle aWindowBox (mxWindow->getPosSize());
    ::std::vector<geometry::RealSize2D> aPartSizes (maElementContainer.size());
    geometry::RealSize2D aTotalSize (0,0);
    bool bIsHorizontal (true);
    sal_Int32 nIndex (0);
    double nTotalHorizontalGap (0);
    sal_Int32 nGapCount (0);
    for (const auto& rxPart : maElementContainer)
    {
        geometry::RealSize2D aSize (CalculatePartSize(rxCanvas, rxPart, bIsHorizontal));

        // Remember the size of each part for later.
        aPartSizes[nIndex] = aSize;

        // Add gaps between elements.
        if (rxPart->size()>1 && bIsHorizontal)
        {
            nTotalHorizontalGap += (rxPart->size() - 1) * gnGapSize;
            nGapCount += rxPart->size() - 1;
        }

        // Orientation changes for each part.
        bIsHorizontal = !bIsHorizontal;
        // Width is accumulated.
        aTotalSize.Width += aSize.Width;
        // Height is the maximum height of all parts.
        aTotalSize.Height = ::std::max(aTotalSize.Height, aSize.Height);
        ++nIndex;
    }
    // Add gaps between parts.
    if (maElementContainer.size() > 1)
    {
        nTotalHorizontalGap += (maElementContainer.size() - 1) * gnGapSize;
        nGapCount += maElementContainer.size()-1;
    }

    // Done to introduce gap between the end of the toolbar and the last button
    aTotalSize.Width += gnGapSize/2;

    // Calculate the minimal size so that the window size of the tool bar
    // can be adapted accordingly.
    maMinimalSize = aTotalSize;
    maMinimalSize.Width += nTotalHorizontalGap;

    // Calculate the gaps between elements.
    double nGapWidth (0);
    if (nGapCount > 0)
    {
        if (aTotalSize.Width + nTotalHorizontalGap > aWindowBox.Width)
            nTotalHorizontalGap = aWindowBox.Width - aTotalSize.Width;
        nGapWidth = nTotalHorizontalGap / nGapCount;
    }

    // Determine the location of the left edge.
    double nX (0);
    switch (meAnchor)
    {
        case Left : nX = 0; break;
        case Center: nX = (aWindowBox.Width - aTotalSize.Width - nTotalHorizontalGap) / 2; break;
    }

    // Place the parts.
    double nY ((aWindowBox.Height - aTotalSize.Height) / 2);
    bIsHorizontal = true;

    /* push front or back ? ... */
    /// check whether RTL interface or not
    if(!AllSettings::GetLayoutRTL()){
        nIndex = 0;
        for (const auto& rxPart : maElementContainer)
        {
            geometry::RealRectangle2D aBoundingBox(
                nX, nY,
                nX+aPartSizes[nIndex].Width, nY+aTotalSize.Height);

            // Add space for gaps between elements.
            if (rxPart->size() > 1 && bIsHorizontal)
                aBoundingBox.X2 += (rxPart->size() - 1) * nGapWidth;

            LayoutPart(rxCanvas, rxPart, aBoundingBox, aPartSizes[nIndex], bIsHorizontal);
            bIsHorizontal = !bIsHorizontal;
            nX += aBoundingBox.X2 - aBoundingBox.X1 + nGapWidth;
            ++nIndex;
        }
    }
    else {
        ElementContainer::iterator iPart;
        ElementContainer::iterator iBegin (maElementContainer.begin());
        for (iPart=maElementContainer.end()-1, nIndex=2; iPart!=iBegin-1; --iPart, --nIndex)
        {
            geometry::RealRectangle2D aBoundingBox(
                nX, nY,
                nX+aPartSizes[nIndex].Width, nY+aTotalSize.Height);

            // Add space for gaps between elements.
            if ((*iPart)->size() > 1)
                if (bIsHorizontal)
                    aBoundingBox.X2 += ((*iPart)->size()-1) * nGapWidth;

            LayoutPart(rxCanvas, *iPart, aBoundingBox, aPartSizes[nIndex], bIsHorizontal);
            bIsHorizontal = !bIsHorizontal;
            nX += aBoundingBox.X2 - aBoundingBox.X1 + nGapWidth;
        }
    }

    // The whole window has to be repainted.
    std::shared_ptr<PresenterPaintManager> xManager(mpPresenterController->GetPaintManager());
    if (!xManager)
        return;
    xManager->Invalidate(mxWindow);
}

geometry::RealSize2D PresenterToolBar::CalculatePartSize (
    const Reference<rendering::XCanvas>& rxCanvas,
    const SharedElementContainerPart& rpPart,
    const bool bIsHorizontal)
{
    geometry::RealSize2D aTotalSize (0,0);

    if (mxWindow.is())
    {
        // Calculate the summed width of all elements.
        for (const auto& rxElement : *rpPart)
        {
            if (!rxElement)
                continue;

            const awt::Size aBSize (rxElement->GetBoundingSize(rxCanvas));
            if (bIsHorizontal)
            {
                aTotalSize.Width += aBSize.Width;
                if (aBSize.Height > aTotalSize.Height)
                    aTotalSize.Height = aBSize.Height;
            }
            else
            {
                aTotalSize.Height += aBSize.Height;
                if (aBSize.Width > aTotalSize.Width)
                    aTotalSize.Width = aBSize.Width;
            }
        }
    }
    return aTotalSize;
}

void PresenterToolBar::LayoutPart (
    const Reference<rendering::XCanvas>& rxCanvas,
    const SharedElementContainerPart& rpPart,
    const geometry::RealRectangle2D& rBoundingBox,
    const geometry::RealSize2D& rPartSize,
    const bool bIsHorizontal)
{
    double nGap (0);
    if (rpPart->size() > 1)
    {
        if (bIsHorizontal)
            nGap = (rBoundingBox.X2 - rBoundingBox.X1 - rPartSize.Width) / (rpPart->size()-1);
        else
            nGap = (rBoundingBox.Y2 - rBoundingBox.Y1 - rPartSize.Height) / (rpPart->size()-1);
    }

    // Place the elements.
    double nX (rBoundingBox.X1);
    double nY (rBoundingBox.Y1);

    /// check whether RTL interface or not
    if(!AllSettings::GetLayoutRTL()){
        for (auto& rxElement : *rpPart)
        {
            if (!rxElement)
                continue;

            const awt::Size aElementSize (rxElement->GetBoundingSize(rxCanvas));
            if (bIsHorizontal)
            {
                if (rxElement->IsFilling())
                {
                    nY = rBoundingBox.Y1;
                    rxElement->SetSize(geometry::RealSize2D(aElementSize.Width, rBoundingBox.Y2 - rBoundingBox.Y1));
                }
                else
                    nY = rBoundingBox.Y1 + (rBoundingBox.Y2-rBoundingBox.Y1 - aElementSize.Height) / 2;
                rxElement->SetLocation(awt::Point(sal_Int32(0.5 + nX), sal_Int32(0.5 + nY)));
                nX += aElementSize.Width + nGap;
            }
            else
            {
                if (rxElement->IsFilling())
                {
                    nX = rBoundingBox.X1;
                    rxElement->SetSize(geometry::RealSize2D(rBoundingBox.X2 - rBoundingBox.X1, aElementSize.Height));
                }
                else
                    nX = rBoundingBox.X1 + (rBoundingBox.X2-rBoundingBox.X1 - aElementSize.Width) / 2;
                rxElement->SetLocation(awt::Point(sal_Int32(0.5 + nX), sal_Int32(0.5 + nY)));
                nY += aElementSize.Height + nGap;
            }
        }
    }
    else {
        ElementContainerPart::const_iterator iElement;
        ElementContainerPart::const_iterator iBegin (rpPart->begin());

        for (iElement=rpPart->end()-1; iElement!=iBegin-1; --iElement)
        {
            if (iElement->get() == nullptr)
                continue;

            const awt::Size aElementSize ((*iElement)->GetBoundingSize(rxCanvas));
            if (bIsHorizontal)
            {
                if ((*iElement)->IsFilling())
                {
                    nY = rBoundingBox.Y1;
                    (*iElement)->SetSize(geometry::RealSize2D(aElementSize.Width, rBoundingBox.Y2 - rBoundingBox.Y1));
                }
                else
                    nY = rBoundingBox.Y1 + (rBoundingBox.Y2-rBoundingBox.Y1 - aElementSize.Height) / 2;
                (*iElement)->SetLocation(awt::Point(sal_Int32(0.5 + nX), sal_Int32(0.5 + nY)));
                nX += aElementSize.Width + nGap;
            }
            else
            {
                // reverse presentation time with current time
                if (iElement==iBegin){
                    iElement=iBegin+2;
                }
                else if (iElement==iBegin+2){
                    iElement=iBegin;
                }
                const awt::Size aNewElementSize ((*iElement)->GetBoundingSize(rxCanvas));
                if ((*iElement)->IsFilling())
                {
                    nX = rBoundingBox.X1;
                    (*iElement)->SetSize(geometry::RealSize2D(rBoundingBox.X2 - rBoundingBox.X1, aNewElementSize.Height));
                }
                else
                    nX = rBoundingBox.X1 + (rBoundingBox.X2-rBoundingBox.X1 - aNewElementSize.Width) / 2;
                (*iElement)->SetLocation(awt::Point(sal_Int32(0.5 + nX), sal_Int32(0.5 + nY)));
                nY += aNewElementSize.Height + nGap;

                // return the index as it was before the reversing
                if (iElement==iBegin)
                    iElement=iBegin+2;
                else if (iElement==iBegin+2)
                    iElement=iBegin;
            }
        }
    }
}

void PresenterToolBar::Paint (
    const awt::Rectangle& rUpdateBox,
    const rendering::ViewState& rViewState)
{
    OSL_ASSERT(mxCanvas.is());

    for (const auto& rxPart : maElementContainer)
    {
        for (auto& rxElement : *rxPart)
        {
            if (rxElement)
            {
                if ( ! rxElement->IsOutside(rUpdateBox))
                    rxElement->Paint(mxCanvas, rViewState);
            }
        }
    }
}

void PresenterToolBar::UpdateSlideNumber()
{
    if( mxSlideShowController.is() )
    {
        for (const auto& rxPart : maElementContainer)
        {
            for (auto& rxElement : *rxPart)
            {
                if (rxElement)
                    rxElement->CurrentSlideHasChanged();
            }
        }
    }
}

void PresenterToolBar::CheckMouseOver (
    const css::awt::MouseEvent& rEvent,
    const bool bOverWindow,
    const bool bMouseDown)
{
    css::awt::MouseEvent rTemp =rEvent;
    if(AllSettings::GetLayoutRTL()){
        awt::Rectangle aWindowBox = mxWindow->getPosSize();
        rTemp.X=aWindowBox.Width-rTemp.X;
    }
    for (const auto& rxPart : maElementContainer)
    {
        for (auto& rxElement : *rxPart)
        {
            if (!rxElement)
                continue;

            awt::Rectangle aBox (rxElement->GetBoundingBox());
            const bool bIsOver = bOverWindow
                && aBox.X <= rTemp.X
                && aBox.Width+aBox.X-1 >= rTemp.X
                && aBox.Y <= rTemp.Y
                && aBox.Height+aBox.Y-1 >= rTemp.Y;
            rxElement->SetState(
                bIsOver,
                bIsOver && rTemp.Buttons!=0 && bMouseDown && rTemp.ClickCount>0);
        }
    }
}

void PresenterToolBar::ThrowIfDisposed() const
{
    if (rBHelper.bDisposed || rBHelper.bInDispose)
    {
        throw lang::DisposedException (
            u"PresenterToolBar has already been disposed"_ustr,
            const_cast<uno::XWeak*>(static_cast<const uno::XWeak*>(this)));
    }
}

//===== PresenterToolBarView ==================================================

PresenterToolBarView::PresenterToolBarView (
    const Reference<XComponentContext>& rxContext,
    const Reference<XResourceId>& rxViewId,
    const rtl::Reference<::sd::DrawController>& rxController,
    const ::rtl::Reference<PresenterController>& rpPresenterController)
    : PresenterToolBarViewInterfaceBase(m_aMutex),
      mxViewId(rxViewId),
      mpPresenterController(rpPresenterController)
{
    try
    {
        Reference<XConfigurationController> xCC(rxController->getConfigurationController(),UNO_SET_THROW);
        mxPane.set(xCC->getResource(rxViewId->getAnchor()), UNO_QUERY_THROW);

        mxWindow = mxPane->getWindow();
        mxCanvas = mxPane->getCanvas();

        mpToolBar = new PresenterToolBar(
            rxContext,
            mxWindow,
            mxCanvas,
            rpPresenterController,
            PresenterToolBar::Center);
        mpToolBar->Initialize(u"PresenterScreenSettings/ToolBars/ToolBar"_ustr);

        if (mxWindow.is())
        {
            mxWindow->addPaintListener(this);

            Reference<awt::XWindowPeer> xPeer (mxWindow, UNO_QUERY);
            if (xPeer.is())
                xPeer->setBackground(util::Color(0xff000000));

            mxWindow->setVisible(true);
        }
    }
    catch (RuntimeException&)
    {
        mxViewId = nullptr;
        throw;
    }
}

PresenterToolBarView::~PresenterToolBarView()
{
}

void SAL_CALL PresenterToolBarView::disposing()
{
    Reference<lang::XComponent> xComponent = mpToolBar;
    mpToolBar = nullptr;
    if (xComponent.is())
        xComponent->dispose();

    if (mxWindow.is())
    {
        mxWindow->removePaintListener(this);
        mxWindow = nullptr;
    }
    mxCanvas = nullptr;
    mxViewId = nullptr;
    mxPane = nullptr;
    mpPresenterController = nullptr;
}

const ::rtl::Reference<PresenterToolBar>& PresenterToolBarView::GetPresenterToolBar() const
{
    return mpToolBar;
}

//----- XPaintListener --------------------------------------------------------

void SAL_CALL PresenterToolBarView::windowPaint (const css::awt::PaintEvent& rEvent)
{
    awt::Rectangle aWindowBox (mxWindow->getPosSize());
    mpPresenterController->GetCanvasHelper()->Paint(
        mpPresenterController->GetViewBackground(mxViewId->getResourceURL()),
        mxCanvas,
        rEvent.UpdateRect,
        awt::Rectangle(0,0,aWindowBox.Width, aWindowBox.Height),
        awt::Rectangle());
}

//-----  lang::XEventListener -------------------------------------------------

void SAL_CALL PresenterToolBarView::disposing (const lang::EventObject& rEventObject)
{
    if (rEventObject.Source == mxWindow)
        mxWindow = nullptr;
}

//----- XResourceId -----------------------------------------------------------

Reference<XResourceId> SAL_CALL PresenterToolBarView::getResourceId()
{
    return mxViewId;
}

sal_Bool SAL_CALL PresenterToolBarView::isAnchorOnly()
{
    return false;
}

//----- XDrawView -------------------------------------------------------------

void SAL_CALL PresenterToolBarView::setCurrentPage (const Reference<drawing::XDrawPage>& rxSlide)
{
    Reference<drawing::XDrawView> xToolBar = mpToolBar;
    if (xToolBar.is())
        xToolBar->setCurrentPage(rxSlide);
}

Reference<drawing::XDrawPage> SAL_CALL PresenterToolBarView::getCurrentPage()
{
    return nullptr;
}

//===== PresenterToolBar::Element =============================================

namespace {

Element::Element (
    ::rtl::Reference<PresenterToolBar> pToolBar)
    : ElementInterfaceBase(m_aMutex),
      mpToolBar(std::move(pToolBar)),
      mbIsOver(false),
      mbIsPressed(false),
      mbIsSelected(false),
      mbIsEnabled(true)
{
    if (mpToolBar)
    {
        OSL_ASSERT(mpToolBar->GetPresenterController().is());
        OSL_ASSERT(mpToolBar->GetPresenterController()->GetWindowManager().is());
    }
}

void Element::SetModes (
    const SharedElementMode& rpNormalMode,
    const SharedElementMode& rpMouseOverMode,
    const SharedElementMode& rpSelectedMode,
    const SharedElementMode& rpDisabledMode,
    const SharedElementMode& rpMouseOverSelectedMode)
{
    mpNormal = rpNormalMode;
    mpMouseOver = rpMouseOverMode;
    mpSelected = rpSelectedMode;
    mpDisabled = rpDisabledMode;
    mpMouseOverSelected = rpMouseOverSelectedMode;
    mpMode = rpNormalMode;
}

void Element::disposing()
{
}

awt::Size const & Element::GetBoundingSize (
    const Reference<rendering::XCanvas>& rxCanvas)
{
    maSize = CreateBoundingSize(rxCanvas);
    return maSize;
}

awt::Rectangle Element::GetBoundingBox() const
{
    return awt::Rectangle(maLocation.X,maLocation.Y, maSize.Width, maSize.Height);
}

void Element::CurrentSlideHasChanged()
{
    UpdateState();
}

void Element::SetLocation (const awt::Point& rLocation)
{
    maLocation = rLocation;
}

void Element::SetSize (const geometry::RealSize2D& rSize)
{
    maSize = awt::Size(sal_Int32(0.5+rSize.Width), sal_Int32(0.5+rSize.Height));
}

bool Element::SetState (
    const bool bIsOver,
    const bool bIsPressed)
{
    bool bModified (mbIsOver != bIsOver || mbIsPressed != bIsPressed);
    bool bClicked (mbIsPressed && bIsOver && ! bIsPressed);

    mbIsOver = bIsOver;
    mbIsPressed = bIsPressed;

    // When the element is disabled then ignore mouse over or selection.
    // When the element is selected then ignore mouse over.
    if ( ! mbIsEnabled)
        mpMode = mpDisabled;
    else if (mbIsSelected && mbIsOver)
        mpMode = mpMouseOverSelected;
    else if (mbIsSelected)
        mpMode = mpSelected;
    else if (mbIsOver)
        mpMode = mpMouseOver;
    else
        mpMode = mpNormal;

    if (bClicked && mbIsEnabled)
    {
        if (mpMode)
        {
            do
            {
                if (mpMode->msAction.isEmpty())
                    break;

                if (!mpToolBar)
                    break;

                if (!mpToolBar->GetPresenterController())
                    break;

                mpToolBar->GetPresenterController()->DispatchUnoCommand(mpMode->msAction);
                mpToolBar->RequestLayout();
            }
            while (false);
        }

    }
    else if (bModified)
    {
        Invalidate(true);
    }

    return bModified;
}

void Element::Invalidate (const bool bSynchronous)
{
    OSL_ASSERT(mpToolBar.is());
    mpToolBar->InvalidateArea(GetBoundingBox(), bSynchronous);
}

bool Element::IsOutside (const awt::Rectangle& rBox)
{
    if (rBox.X >= maLocation.X+maSize.Width)
        return true;
    else if (rBox.Y >= maLocation.Y+maSize.Height)
        return true;
    else if (maLocation.X >= rBox.X+rBox.Width)
        return true;
    else if (maLocation.Y >= rBox.Y+rBox.Height)
        return true;
    else
        return false;
}


bool Element::IsFilling() const
{
    return false;
}

void Element::UpdateState()
{
    OSL_ASSERT(mpToolBar);
    OSL_ASSERT(mpToolBar->GetPresenterController());

    if (!mpMode)
        return;

    util::URL aURL (mpToolBar->GetPresenterController()->CreateURLFromString(mpMode->msAction));
    Reference<frame::XDispatch> xDispatch (mpToolBar->GetPresenterController()->GetDispatch(aURL));
    if (xDispatch.is())
    {
        xDispatch->addStatusListener(this, aURL);
        xDispatch->removeStatusListener(this, aURL);
    }
}

//----- lang::XEventListener --------------------------------------------------

void SAL_CALL Element::disposing (const css::lang::EventObject&) {}

//----- document::XEventListener ----------------------------------------------

void SAL_CALL Element::notifyEvent (const css::document::EventObject&)
{
    UpdateState();
}

//----- frame::XStatusListener ------------------------------------------------

void SAL_CALL Element::statusChanged (const css::frame::FeatureStateEvent& rEvent)
{
    bool bIsSelected (mbIsSelected);
    bool bIsEnabled (rEvent.IsEnabled);
    rEvent.State >>= bIsSelected;

    if (bIsSelected != mbIsSelected || bIsEnabled != mbIsEnabled)
    {
        mbIsEnabled = bIsEnabled;
        mbIsSelected = bIsSelected;
        SetState(mbIsOver, mbIsPressed);
        mpToolBar->RequestLayout();
    }
}

} // end of anonymous namespace

//===== ElementMode ===========================================================

namespace {

ElementMode::ElementMode()
{
}

void ElementMode::ReadElementMode (
    const Reference<beans::XPropertySet>& rxElementProperties,
    const OUString& rsModeName,
    std::shared_ptr<ElementMode> const & rpDefaultMode,
    ::sdext::presenter::PresenterToolBar::Context const & rContext)
{
    try
    {
    Reference<container::XHierarchicalNameAccess> xNode (
        PresenterConfigurationAccess::GetProperty(rxElementProperties, rsModeName),
        UNO_QUERY);
    Reference<beans::XPropertySet> xProperties (
        PresenterConfigurationAccess::GetNodeProperties(xNode, OUString()));
    if (!xProperties.is() && rpDefaultMode != nullptr)
    {
        // The mode is not specified.  Use the given, possibly empty,
        // default mode instead.
        mpIcon = rpDefaultMode->mpIcon;
        msAction = rpDefaultMode->msAction;
        maText = rpDefaultMode->maText;
    }

    // Read action.
    if ( ! (PresenterConfigurationAccess::GetProperty(xProperties, u"Action"_ustr) >>= msAction))
        if (rpDefaultMode != nullptr)
            msAction = rpDefaultMode->msAction;

    // Read text and font
    {
        OUString sText(rpDefaultMode != nullptr ? rpDefaultMode->maText.GetText() : OUString());
        PresenterConfigurationAccess::GetProperty(xProperties, u"Text"_ustr) >>= sText;
        Reference<container::XHierarchicalNameAccess> xFontNode (
            PresenterConfigurationAccess::GetProperty(xProperties, u"Font"_ustr), UNO_QUERY);
        PresenterTheme::SharedFontDescriptor pFont(PresenterTheme::ReadFont(
            xFontNode, rpDefaultMode != nullptr ? rpDefaultMode->maText.GetFont()
                                                : PresenterTheme::SharedFontDescriptor()));
        maText = Text(std::move(sText), std::move(pFont));
    }

    // Read bitmaps to display as icons.
    Reference<container::XHierarchicalNameAccess> xIconNode (
        PresenterConfigurationAccess::GetProperty(xProperties, u"Icon"_ustr), UNO_QUERY);
    mpIcon = PresenterBitmapContainer::LoadBitmap(
        xIconNode, u""_ustr, rContext.mxPresenterHelper, rContext.mxCanvas,
        rpDefaultMode != nullptr ? rpDefaultMode->mpIcon : SharedBitmapDescriptor());
    }
    catch(Exception&)
    {
        OSL_ASSERT(false);
    }
}

} // end of anonymous namespace

//===== Button ================================================================

namespace {

::rtl::Reference<Element> Button::Create (
    const ::rtl::Reference<PresenterToolBar>& rpToolBar)
{
    ::rtl::Reference<Button> pElement (new Button(rpToolBar));
    pElement->Initialize();
    return pElement;
}

Button::Button (
    const ::rtl::Reference<PresenterToolBar>& rpToolBar)
    : Element(rpToolBar),
      mbIsListenerRegistered(false)
{
    OSL_ASSERT(mpToolBar);
    OSL_ASSERT(mpToolBar->GetPresenterController().is());
    OSL_ASSERT(mpToolBar->GetPresenterController()->GetWindowManager().is());
}

void Button::Initialize()
{
    mpToolBar->GetPresenterController()->GetWindowManager()->AddLayoutListener(this);
    mbIsListenerRegistered = true;
}

void Button::disposing()
{
    OSL_ASSERT(mpToolBar);
    if (mpToolBar && mbIsListenerRegistered)
    {
        OSL_ASSERT(mpToolBar->GetPresenterController().is());
        OSL_ASSERT(mpToolBar->GetPresenterController()->GetWindowManager().is());

        mbIsListenerRegistered = false;
        mpToolBar->GetPresenterController()->GetWindowManager()->RemoveLayoutListener(this);
    }
    Element::disposing();
}

void Button::Paint (
    const Reference<rendering::XCanvas>& rxCanvas,
    const rendering::ViewState& rViewState)
{
    OSL_ASSERT(rxCanvas.is());

    if (!mpMode)
        return;

    if (!mpMode->mpIcon)
        return;

    geometry::RealRectangle2D aTextBBox (mpMode->maText.GetBoundingBox(rxCanvas));
    sal_Int32 nTextHeight (sal::static_int_cast<sal_Int32>(0.5 + aTextBBox.Y2 - aTextBBox.Y1));

    PaintIcon(rxCanvas, nTextHeight, rViewState);
    mpMode->maText.Paint(rxCanvas, rViewState, GetBoundingBox());
}

awt::Size Button::CreateBoundingSize (
    const Reference<rendering::XCanvas>& rxCanvas)
{
    if (!mpMode)
        return awt::Size();

    geometry::RealRectangle2D aTextBBox (mpMode->maText.GetBoundingBox(rxCanvas));

    // tdf#128964 This ensures that if the text of a button changes due to a change in
    // the state of the button the other buttons of the toolbar do not move. The button is
    // allotted the maximum size so that it doesn't resize during a change of state.
    geometry::RealRectangle2D aTextBBoxNormal (mpNormal->maText.GetBoundingBox(rxCanvas));
    geometry::RealRectangle2D aTextBBoxMouseOver (mpMouseOver->maText.GetBoundingBox(rxCanvas));
    geometry::RealRectangle2D aTextBBoxSelected (mpSelected->maText.GetBoundingBox(rxCanvas));
    geometry::RealRectangle2D aTextBBoxDisabled (mpDisabled->maText.GetBoundingBox(rxCanvas));
    geometry::RealRectangle2D aTextBBoxMouseOverSelected (mpMouseOverSelected->maText.GetBoundingBox(rxCanvas));
    std::vector<sal_Int32> widths
    {
        sal::static_int_cast<sal_Int32>(0.5 + aTextBBoxNormal.X2 - aTextBBoxNormal.X1),
        sal::static_int_cast<sal_Int32>(0.5 + aTextBBoxMouseOver.X2 - aTextBBoxMouseOver.X1),
        sal::static_int_cast<sal_Int32>(0.5 + aTextBBoxSelected.X2 - aTextBBoxSelected.X1),
        sal::static_int_cast<sal_Int32>(0.5 + aTextBBoxDisabled.X2 - aTextBBoxDisabled.X1),
        sal::static_int_cast<sal_Int32>(0.5 + aTextBBoxMouseOverSelected.X2 - aTextBBoxMouseOverSelected.X1)
    };

    sal_Int32 nTextHeight (sal::static_int_cast<sal_Int32>(0.5 + aTextBBox.Y2 - aTextBBox.Y1));
    Reference<rendering::XBitmap> xBitmap;
    if (mpMode->mpIcon)
        xBitmap = mpMode->mpIcon->GetNormalBitmap();
    if (xBitmap.is())
    {
        const sal_Int32 nGap (5);
        geometry::IntegerSize2D aSize (xBitmap->getSize());
        return awt::Size(
            ::std::max(aSize.Width, *std::max_element(widths.begin(), widths.end())),
            aSize.Height + nGap + nTextHeight);
    }
    else
    {
        return awt::Size(*std::max_element(widths.begin(), widths.end()), nTextHeight);
    }
}

void Button::PaintIcon (
    const Reference<rendering::XCanvas>& rxCanvas,
    const sal_Int32 nTextHeight,
    const rendering::ViewState& rViewState)
{
    if (!mpMode)
        return;

    Reference<rendering::XBitmap> xBitmap (mpMode->mpIcon->GetBitmap(GetMode()));
    if (!xBitmap.is())
        return;

    /// check whether RTL interface or not
    if(!AllSettings::GetLayoutRTL()){
        const sal_Int32 nX (maLocation.X
            + (maSize.Width-xBitmap->getSize().Width) / 2);
        const sal_Int32 nY (maLocation.Y
            + (maSize.Height - nTextHeight - xBitmap->getSize().Height) / 2);
        const rendering::RenderState aRenderState(
            geometry::AffineMatrix2D(1,0,nX, 0,1,nY),
            nullptr,
            Sequence<double>(4),
            rendering::CompositeOperation::OVER);
        rxCanvas->drawBitmap(xBitmap, rViewState, aRenderState);
    }
    else {
        const sal_Int32 nX (maLocation.X
            + (maSize.Width+xBitmap->getSize().Width) / 2);
        const sal_Int32 nY (maLocation.Y
            + (maSize.Height - nTextHeight - xBitmap->getSize().Height) / 2);
        const rendering::RenderState aRenderState(
            geometry::AffineMatrix2D(-1,0,nX, 0,1,nY),
            nullptr,
            Sequence<double>(4),
            rendering::CompositeOperation::OVER);
        rxCanvas->drawBitmap(xBitmap, rViewState, aRenderState);
    }
}

PresenterBitmapDescriptor::Mode Button::GetMode() const
{
    if ( ! IsEnabled())
        return PresenterBitmapDescriptor::Disabled;
    else if (mbIsPressed)
        return PresenterBitmapDescriptor::ButtonDown;
    else if (mbIsOver)
        return PresenterBitmapDescriptor::MouseOver;
    else
        return PresenterBitmapDescriptor::Normal;
}

//----- lang::XEventListener --------------------------------------------------

void SAL_CALL Button::disposing (const css::lang::EventObject& rEvent)
{
    mbIsListenerRegistered = false;
    Element::disposing(rEvent);
}

} // end of anonymous namespace

//===== PresenterToolBar::Label ===============================================

namespace {

Label::Label (const ::rtl::Reference<PresenterToolBar>& rpToolBar)
    : Element(rpToolBar)
{
}

awt::Size Label::CreateBoundingSize (
    const Reference<rendering::XCanvas>& rxCanvas)
{
    if (!mpMode)
        return awt::Size(0,0);

    geometry::RealRectangle2D aTextBBox (mpMode->maText.GetBoundingBox(rxCanvas));
    return awt::Size(
        sal::static_int_cast<sal_Int32>(0.5 + aTextBBox.X2 - aTextBBox.X1),
        sal::static_int_cast<sal_Int32>(0.5 + aTextBBox.Y2 - aTextBBox.Y1));
}

void Label::SetText (const OUString& rsText)
{
    OSL_ASSERT(mpToolBar);
    if (!mpMode)
        return;

    const bool bRequestLayout (mpMode->maText.GetText().getLength() != rsText.getLength());

    mpMode->maText.SetText(rsText);
    // Just use the character count for determining whether a layout is
    // necessary.  This is an optimization to avoid layouts every time a new
    // time value is set on some labels.
    if (bRequestLayout)
        mpToolBar->RequestLayout();
    else
        Invalidate(false);
}

void Label::Paint (
    const Reference<rendering::XCanvas>& rxCanvas,
    const rendering::ViewState& rViewState)
{
    OSL_ASSERT(rxCanvas.is());
    if (!mpMode)
        return;

    mpMode->maText.Paint(rxCanvas, rViewState, GetBoundingBox());
}

bool Label::SetState (const bool, const bool)
{
    // For labels there is no mouse over effect.
    return Element::SetState(false, false);
}

} // end of anonymous namespace

//===== Text ==================================================================

namespace {

Text::Text()
{
}

Text::Text (
    OUString sText,
    PresenterTheme::SharedFontDescriptor pFont)
    : msText(std::move(sText)),
      mpFont(std::move(pFont))
{
}

void Text::SetText (const OUString& rsText)
{
    msText = rsText;
}

const OUString& Text::GetText() const
{
    return msText;
}

const PresenterTheme::SharedFontDescriptor& Text::GetFont() const
{
    return mpFont;
}

void Text::Paint (
    const Reference<rendering::XCanvas>& rxCanvas,
    const rendering::ViewState& rViewState,
    const awt::Rectangle& rBoundingBox)
{
    OSL_ASSERT(rxCanvas.is());

    if (msText.isEmpty())
        return;
    if (!mpFont)
        return;

    if ( ! mpFont->mxFont.is())
        mpFont->PrepareFont(rxCanvas);
    if ( ! mpFont->mxFont.is())
        return;

    rendering::StringContext aContext (msText, 0, msText.getLength());

    Reference<rendering::XTextLayout> xLayout (
        mpFont->mxFont->createTextLayout(
            aContext,
            rendering::TextDirection::WEAK_LEFT_TO_RIGHT,
            0));
    geometry::RealRectangle2D aBox (xLayout->queryTextBounds());
    const double nTextWidth = aBox.X2 - aBox.X1;
    const double nY = rBoundingBox.Y + rBoundingBox.Height - aBox.Y2;
    const double nX = rBoundingBox.X + (rBoundingBox.Width - nTextWidth)/2;

    rendering::RenderState aRenderState(
        geometry::AffineMatrix2D(1,0,nX, 0,1,nY),
        nullptr,
        Sequence<double>(4),
        rendering::CompositeOperation::SOURCE);
    PresenterCanvasHelper::SetDeviceColor(aRenderState, mpFont->mnColor);
    rxCanvas->drawTextLayout(
        xLayout,
        rViewState,
        aRenderState);
}

geometry::RealRectangle2D Text::GetBoundingBox (const Reference<rendering::XCanvas>& rxCanvas)
{
    if (mpFont && !msText.isEmpty())
    {
        if ( ! mpFont->mxFont.is())
            mpFont->PrepareFont(rxCanvas);
        if (mpFont->mxFont.is())
        {
            rendering::StringContext aContext (msText, 0, msText.getLength());
            Reference<rendering::XTextLayout> xLayout (
                mpFont->mxFont->createTextLayout(
                    aContext,
                    rendering::TextDirection::WEAK_LEFT_TO_RIGHT,
                    0));
            return xLayout->queryTextBounds();
        }
    }
    return geometry::RealRectangle2D(0,0,0,0);
}

//===== TimeFormatter =========================================================

OUString TimeFormatter::FormatTime (const oslDateTime& rTime)
{
    OUStringBuffer sText;

    const sal_Int32 nHours (sal::static_int_cast<sal_Int32>(rTime.Hours));
    const sal_Int32 nMinutes (sal::static_int_cast<sal_Int32>(rTime.Minutes));
    const sal_Int32 nSeconds(sal::static_int_cast<sal_Int32>(rTime.Seconds));
    // Hours
    sText.append(OUString::number(nHours) + ":");

    // Minutes
    const OUString sMinutes (OUString::number(nMinutes));
    if (sMinutes.getLength() == 1)
        sText.append("0");
    sText.append(sMinutes);

    // Seconds
    sText.append(":");
    const OUString sSeconds (OUString::number(nSeconds));
    if (sSeconds.getLength() == 1)
        sText.append("0");
    sText.append(sSeconds);
    return sText.makeStringAndClear();
}

//===== TimeLabel =============================================================

TimeLabel::TimeLabel (const ::rtl::Reference<PresenterToolBar>& rpToolBar)
    : Label(rpToolBar)
{
}

void SAL_CALL TimeLabel::disposing()
{
    PresenterClockTimer::Instance(mpToolBar->GetComponentContext())->RemoveListener(mpListener);
    mpListener.reset();
}

void TimeLabel::ConnectToTimer()
{
    mpListener = std::make_shared<Listener>(this);
    PresenterClockTimer::Instance(mpToolBar->GetComponentContext())->AddListener(mpListener);
}

//===== CurrentTimeLabel ======================================================

::rtl::Reference<Element> CurrentTimeLabel::Create (
    const ::rtl::Reference<PresenterToolBar>& rpToolBar)
{
    ::rtl::Reference<TimeLabel> pElement(new CurrentTimeLabel(rpToolBar));
    pElement->ConnectToTimer();
    return pElement;
}

CurrentTimeLabel::~CurrentTimeLabel()
{
}

CurrentTimeLabel::CurrentTimeLabel (
    const ::rtl::Reference<PresenterToolBar>& rpToolBar)
    : TimeLabel(rpToolBar)
{
}

void CurrentTimeLabel::TimeHasChanged (const oslDateTime& rCurrentTime)
{
    SetText(TimeFormatter::FormatTime(rCurrentTime));
    Invalidate(false);
}

void CurrentTimeLabel::SetModes (
    const SharedElementMode& rpNormalMode,
    const SharedElementMode& rpMouseOverMode,
    const SharedElementMode& rpSelectedMode,
    const SharedElementMode& rpDisabledMode,
    const SharedElementMode& rpMouseOverSelectedMode)
{
    TimeLabel::SetModes(rpNormalMode, rpMouseOverMode, rpSelectedMode, rpDisabledMode, rpMouseOverSelectedMode);
    SetText(TimeFormatter::FormatTime(PresenterClockTimer::GetCurrentTime()));
}

//===== PresentationTimeLabel =================================================

::rtl::Reference<Element> PresentationTimeLabel::Create (
    const ::rtl::Reference<PresenterToolBar>& rpToolBar)
{
    ::rtl::Reference<TimeLabel> pElement(new PresentationTimeLabel(rpToolBar));
    pElement->ConnectToTimer();
    return pElement;
}

PresentationTimeLabel::~PresentationTimeLabel()
{
    mpToolBar->GetPresenterController()->SetPresentationTime(nullptr);
}

PresentationTimeLabel::PresentationTimeLabel (
    const ::rtl::Reference<PresenterToolBar>& rpToolBar)
    : TimeLabel(rpToolBar),
      maStartTimeValue()
{
    restart();
    setPauseStatus(false);
    TimeValue pauseTime(0,0);
    setPauseTimeValue(pauseTime);
    mpToolBar->GetPresenterController()->SetPresentationTime(this);
}

void PresentationTimeLabel::restart()
{
    TimeValue pauseTime(0, 0);
    setPauseTimeValue(pauseTime);
    maStartTimeValue.Seconds = 0;
    maStartTimeValue.Nanosec = 0;
}

bool PresentationTimeLabel::isPaused()
{
	return paused;
}

void PresentationTimeLabel::setPauseStatus(const bool pauseStatus)
{
	paused = pauseStatus;
}

const TimeValue& PresentationTimeLabel::getPauseTimeValue() const
{
	return pauseTimeValue;
}

void PresentationTimeLabel::setPauseTimeValue(const TimeValue pauseTime)
{
    //store the time at which the presentation was paused
	pauseTimeValue = pauseTime;
}

void PresentationTimeLabel::TimeHasChanged (const oslDateTime& rCurrentTime)
{
    TimeValue aCurrentTimeValue;
    if (!osl_getTimeValueFromDateTime(&rCurrentTime, &aCurrentTimeValue))
        return;

    if (maStartTimeValue.Seconds==0 && maStartTimeValue.Nanosec==0)
    {
        // This method is called for the first time.  Initialize the
        // start time.  The start time is rounded to nearest second to
        // keep the time updates synchronized with the current time label.
        maStartTimeValue = aCurrentTimeValue;
        if (maStartTimeValue.Nanosec >= 500000000)
            maStartTimeValue.Seconds += 1;
        maStartTimeValue.Nanosec = 0;
    }

    //The start time value is incremented by the amount of time
    //the presentation was paused for in order to continue the
    //timer from the same position
    if(!isPaused())
    {
        TimeValue pauseTime = getPauseTimeValue();
        if(pauseTime.Seconds != 0 || pauseTime.Nanosec != 0)
        {
            TimeValue incrementValue(0, 0);
            incrementValue.Seconds = aCurrentTimeValue.Seconds - pauseTime.Seconds;
            if(pauseTime.Nanosec > aCurrentTimeValue.Nanosec)
            {
                incrementValue.Nanosec = 1000000000 + aCurrentTimeValue.Nanosec - pauseTime.Nanosec;
            }
            else
            {
                incrementValue.Nanosec = aCurrentTimeValue.Nanosec - pauseTime.Nanosec;
            }

            maStartTimeValue.Seconds += incrementValue.Seconds;
            maStartTimeValue.Nanosec += incrementValue.Nanosec;
            if(maStartTimeValue.Nanosec >= 1000000000)
            {
                maStartTimeValue.Seconds += 1;
                maStartTimeValue.Nanosec -= 1000000000;
            }

            TimeValue pauseTime_(0, 0);
            setPauseTimeValue(pauseTime_);
        }
    }
    else
    {
        TimeValue pauseTime = getPauseTimeValue();
        if(pauseTime.Seconds == 0 && pauseTime.Nanosec == 0)
        {
            setPauseTimeValue(aCurrentTimeValue);
        }
    }

    TimeValue aElapsedTimeValue;
    aElapsedTimeValue.Seconds = aCurrentTimeValue.Seconds - maStartTimeValue.Seconds;
    aElapsedTimeValue.Nanosec = aCurrentTimeValue.Nanosec - maStartTimeValue.Nanosec;

    oslDateTime aElapsedDateTime;
    if (osl_getDateTimeFromTimeValue(&aElapsedTimeValue, &aElapsedDateTime) && !isPaused())
    {
        SetText(TimeFormatter::FormatTime(aElapsedDateTime));
        Invalidate(false);
    }
}

void PresentationTimeLabel::SetModes (
    const SharedElementMode& rpNormalMode,
    const SharedElementMode& rpMouseOverMode,
    const SharedElementMode& rpSelectedMode,
    const SharedElementMode& rpDisabledMode,
    const SharedElementMode& rpMouseOverSelectedMode)
{
    TimeLabel::SetModes(rpNormalMode, rpMouseOverMode, rpSelectedMode, rpDisabledMode, rpMouseOverSelectedMode);

    oslDateTime aStartDateTime;
    if (osl_getDateTimeFromTimeValue(&maStartTimeValue, &aStartDateTime))
    {
        SetText(TimeFormatter::FormatTime(aStartDateTime));
    }
}

//===== VerticalSeparator =====================================================

VerticalSeparator::VerticalSeparator (
    const ::rtl::Reference<PresenterToolBar>& rpToolBar)
    : Element(rpToolBar)
{
}

void VerticalSeparator::Paint (
    const Reference<rendering::XCanvas>& rxCanvas,
    const rendering::ViewState& rViewState)
{
    OSL_ASSERT(rxCanvas.is());

    awt::Rectangle aBBox (GetBoundingBox());

    rendering::RenderState aRenderState(
        geometry::AffineMatrix2D(1,0,aBBox.X, 0,1,aBBox.Y),
        nullptr,
        Sequence<double>(4),
        rendering::CompositeOperation::OVER);
    if (mpMode)
    {
        PresenterTheme::SharedFontDescriptor pFont (mpMode->maText.GetFont());
        if (pFont)
            PresenterCanvasHelper::SetDeviceColor(aRenderState, pFont->mnColor);
    }

    Reference<rendering::XBitmap> xBitmap(mpToolBar->GetPresenterController()->GetPresenterHelper()->loadBitmap(u"bitmaps/Separator.png"_ustr, rxCanvas));
    if (!xBitmap.is())
        return;

    rxCanvas->drawBitmap(
        xBitmap,
        rViewState,
        aRenderState);
}

awt::Size VerticalSeparator::CreateBoundingSize (
    const Reference<rendering::XCanvas>&)
{
    return awt::Size(1,20);
}

bool VerticalSeparator::IsFilling() const
{
    return true;
}

//===== HorizontalSeparator ===================================================

HorizontalSeparator::HorizontalSeparator (
    const ::rtl::Reference<PresenterToolBar>& rpToolBar)
    : Element(rpToolBar)
{
}

void HorizontalSeparator::Paint (
    const Reference<rendering::XCanvas>& rxCanvas,
    const rendering::ViewState& rViewState)
{
    OSL_ASSERT(rxCanvas.is());

    awt::Rectangle aBBox (GetBoundingBox());

    rendering::RenderState aRenderState(
        geometry::AffineMatrix2D(1,0,0, 0,1,0),
        nullptr,
        Sequence<double>(4),
        rendering::CompositeOperation::OVER);
    if (mpMode)
    {
        PresenterTheme::SharedFontDescriptor pFont (mpMode->maText.GetFont());
        if (pFont)
            PresenterCanvasHelper::SetDeviceColor(aRenderState, pFont->mnColor);
    }

    rxCanvas->fillPolyPolygon(
        PresenterGeometryHelper::CreatePolygon(aBBox, rxCanvas->getDevice()),
        rViewState,
        aRenderState);
}

awt::Size HorizontalSeparator::CreateBoundingSize (
    const Reference<rendering::XCanvas>&)
{
    return awt::Size(20,1);
}

bool HorizontalSeparator::IsFilling() const
{
    return true;
}

} // end of anonymous namespace

} // end of namespace ::sdext::presenter

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