libreoffice/sdext/source/presenter/PresenterPaneBorderManager.cxx

/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: PresenterPaneBorderManager.cxx,v $
 *
 *  $Revision: 1.2 $
 *
 *  last change: $Author: kz $ $Date: 2008-04-03 16:01:20 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/

#include "PresenterPaneBorderManager.hxx"
#include <com/sun/star/awt/InvalidateStyle.hpp>
#include <com/sun/star/awt/PosSize.hpp>
#include <com/sun/star/awt/SystemPointer.hpp>
#include <com/sun/star/awt/WindowAttribute.hpp>
#include <com/sun/star/awt/WindowDescriptor.hpp>
#include <com/sun/star/awt/WindowClass.hpp>
#include <com/sun/star/awt/XWindow2.hpp>
#include <com/sun/star/awt/XWindowPeer.hpp>
#include <com/sun/star/lang/XMultiComponentFactory.hpp>
#include <cppuhelper/compbase1.hxx>
#include <osl/mutex.hxx>
#include <boost/weak_ptr.hpp>

using namespace ::com::sun::star;
using namespace ::com::sun::star::uno;
using ::rtl::OUString;

namespace sdext { namespace presenter {

//===== Service ===============================================================


OUString PresenterPaneBorderManager::getImplementationName_static (void)
{
    return OUString::createFromAscii("com.sun.star.comp.Draw.PresenterPaneBorderManager");
}




Sequence<OUString> PresenterPaneBorderManager::getSupportedServiceNames_static (void)
{
    static const ::rtl::OUString sServiceName(
        ::rtl::OUString::createFromAscii("com.sun.star.drawing.PresenterPaneBorderManager"));
    return Sequence<rtl::OUString>(&sServiceName, 1);
}




Reference<XInterface> PresenterPaneBorderManager::Create (const Reference<uno::XComponentContext>& rxContext)
    SAL_THROW((css::uno::Exception))
{
    return Reference<XInterface>(static_cast<XWeak*>(new PresenterPaneBorderManager(rxContext)));
}




//===== PresenterPaneBorderManager ============================================

PresenterPaneBorderManager::PresenterPaneBorderManager (
    const Reference<XComponentContext>& rxContext)
    : PresenterPaneBorderManagerInterfaceBase(m_aMutex),
      mxComponentContext(rxContext),
      mxPresenterHelper(),
      maWindowList(),
      mnPointerType(),
      maDragAnchor(),
      meDragType(Outside),
      mxOuterDragWindow(),
      mxInnerDragWindow(),
      mxPointer()
{
    Reference<lang::XMultiComponentFactory> xFactory (rxContext->getServiceManager());
    if (xFactory.is())
    {
        mxPointer = Reference<awt::XPointer>(
            xFactory->createInstanceWithContext(
                OUString::createFromAscii("com.sun.star.awt.Pointer"),
                rxContext),
            UNO_QUERY_THROW);

        mxPresenterHelper = Reference<drawing::XPresenterHelper>(
            xFactory->createInstanceWithContext(
                OUString::createFromAscii("com.sun.star.comp.Draw.PresenterHelper"),
                rxContext),
            UNO_QUERY_THROW);
    }
}




PresenterPaneBorderManager::~PresenterPaneBorderManager (void)
{
}




void PresenterPaneBorderManager::disposing (void)
{
    WindowList::const_iterator iDescriptor;
    for (iDescriptor=maWindowList.begin(); iDescriptor!=maWindowList.end(); ++iDescriptor)
    {
        iDescriptor->first->removeMouseListener(this);
        iDescriptor->first->removeMouseMotionListener(this);
    }
    maWindowList.clear();
}




namespace {
const static sal_Int32 mnOutside = 0;
const static sal_Int32 mnLeft = 0x01;
const static sal_Int32 mnHorizontalCenter = 0x02;
const static sal_Int32 mnRight = 0x04;
const static sal_Int32 mnTop = 0x10;
const static sal_Int32 mnVerticalCenter = 0x20;
const static sal_Int32 mnBottom = 0x40;
}

PresenterPaneBorderManager::BorderElement
    PresenterPaneBorderManager::ClassifyBorderElementUnderMouse (
        const Reference<awt::XWindow>& rxOuterWindow,
        const Reference<awt::XWindow>& rxInnerWindow,
        const awt::Point aPosition) const
{
    OSL_ASSERT(rxOuterWindow.is());
    OSL_ASSERT(rxInnerWindow.is());

    awt::Rectangle aOuterBox (rxOuterWindow->getPosSize());
    const awt::Rectangle aInnerBox (rxInnerWindow->getPosSize());

    // Coordinates of the pointer position are given in the window
    // coordinate system.  Therefore the upper left corner of the outer box
    // is the origin.
    aOuterBox.X = 0;
    aOuterBox.Y = 0;

    sal_Int32 nCode = 0;

    // Add horizontal classification to nCode.
    if (aPosition.X < aInnerBox.X)
        if (aPosition.X < aOuterBox.X)
            nCode = mnOutside;
        else
            nCode = mnLeft;
    else if (aPosition.X >= aInnerBox.X+aInnerBox.Width)
        if (aPosition.X >= aOuterBox.X+aOuterBox.Width)
            nCode = mnOutside;
        else
            nCode = mnRight;
    else
        nCode = mnHorizontalCenter;

    // Add vertical classification to nCode.
    if (aPosition.Y < aInnerBox.Y)
        if (aPosition.Y < aOuterBox.Y)
            nCode |= mnOutside;
        else
            nCode |= mnTop;
    else if (aPosition.Y >= aInnerBox.Y+aInnerBox.Height)
        if (aPosition.Y >= aOuterBox.Y+aOuterBox.Height)
            nCode |= mnOutside;
        else
            nCode |= mnBottom;
    else
        nCode |= mnVerticalCenter;

    // Translate bits in nCode into BorderElement value.
    switch (nCode)
    {
        case mnOutside | mnOutside:
        case mnOutside | mnLeft:
        case mnOutside | mnRight:
        case mnOutside | mnHorizontalCenter:
        case mnTop | mnOutside:
        case mnBottom | mnOutside:
        case mnVerticalCenter | mnOutside:
        default:
            return Outside;

        case mnVerticalCenter | mnHorizontalCenter:
            return Content;

        case mnTop | mnLeft:
            return TopLeft;

        case mnTop | mnRight:
            return TopRight;

        case mnTop | mnHorizontalCenter:
            return Top;

        case mnBottom | mnLeft:
            return BottomLeft;

        case mnBottom | mnRight:
            return BottomRight;

        case mnBottom | mnHorizontalCenter:
            return Bottom;

        case mnVerticalCenter | mnLeft:
            return Left;

        case mnVerticalCenter | mnRight:
            return Right;
    }
}




//----- XInitialization -------------------------------------------------------

void SAL_CALL PresenterPaneBorderManager::initialize (const Sequence<Any>& rArguments)
    throw (Exception, RuntimeException)
{
    ThrowIfDisposed();

    if (rArguments.getLength()%2 == 1 && mxComponentContext.is())
    {
        try
        {
            mxParentWindow = Reference<awt::XWindow>(rArguments[0], UNO_QUERY_THROW);

            // Get the outer and inner windows from the argument list and
            // build a window list of it.
            for (sal_Int32 nIndex=1; nIndex<rArguments.getLength(); nIndex+=2)
            {
                Reference<awt::XWindow> xOuterWindow (rArguments[nIndex], UNO_QUERY_THROW);
                Reference<awt::XWindow> xInnerWindow (rArguments[nIndex+1], UNO_QUERY_THROW);

                maWindowList.push_back(WindowDescriptor(xOuterWindow,xInnerWindow));

                xOuterWindow->addMouseListener(this);
                xOuterWindow->addMouseMotionListener(this);
            }
        }
        catch (RuntimeException&)
        {
            PresenterPaneBorderManager::disposing();
            throw;
        }
    }
    else
    {
        throw RuntimeException(
            OUString::createFromAscii("PresenterPane: invalid number of arguments"),
                static_cast<XWeak*>(this));
    }
}




//----- XMouseListener --------------------------------------------------------

void SAL_CALL PresenterPaneBorderManager::mousePressed (const css::awt::MouseEvent& rEvent)
    throw (css::uno::RuntimeException)
{
    ThrowIfDisposed();
    ::osl::MutexGuard aGuard (::osl::Mutex::getGlobalMutex());

    // Find window descriptor of the window that has been clicked.
    WindowList::const_iterator iDescriptor;
    for (iDescriptor=maWindowList.begin(); iDescriptor!=maWindowList.end(); ++iDescriptor)
        if (iDescriptor->first == rEvent.Source)
            break;

    if (iDescriptor != maWindowList.end())
    {
        // Prepare dragging.
        mxOuterDragWindow = iDescriptor->first;
        mxInnerDragWindow = iDescriptor->second;
        OSL_ASSERT(mxOuterDragWindow.is() && mxInnerDragWindow.is());
        const awt::Rectangle aOuterBox (mxOuterDragWindow->getPosSize());
        maDragAnchor.X = rEvent.X + aOuterBox.X;
        maDragAnchor.Y = rEvent.Y + aOuterBox.Y;
        meDragType = ClassifyBorderElementUnderMouse(
            mxOuterDragWindow,
            mxInnerDragWindow,
            awt::Point(rEvent.X, rEvent.Y));
    }
}




void SAL_CALL PresenterPaneBorderManager::mouseReleased (const css::awt::MouseEvent& rEvent)
    throw (css::uno::RuntimeException)
{
    (void)rEvent;
    ThrowIfDisposed();
    ::osl::MutexGuard aGuard (::osl::Mutex::getGlobalMutex());

    ReleaseMouse(mxOuterDragWindow);
    meDragType = PresenterPaneBorderManager::Outside;
    mxOuterDragWindow = NULL;
    mxInnerDragWindow = NULL;
}




void SAL_CALL PresenterPaneBorderManager::mouseEntered (const css::awt::MouseEvent& rEvent)
    throw (css::uno::RuntimeException)
{
    (void)rEvent;
}




void SAL_CALL PresenterPaneBorderManager::mouseExited (const css::awt::MouseEvent& rEvent)
    throw (css::uno::RuntimeException)
{
    (void)rEvent;
    ThrowIfDisposed();
    ::osl::MutexGuard aGuard (::osl::Mutex::getGlobalMutex());

    ReleaseMouse(mxOuterDragWindow);
    meDragType = PresenterPaneBorderManager::Outside;
    mxOuterDragWindow = NULL;
    mxInnerDragWindow = NULL;
}




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

void SAL_CALL PresenterPaneBorderManager::mouseMoved (const css::awt::MouseEvent& rEvent)
    throw (css::uno::RuntimeException)
{
    ThrowIfDisposed();
    ::osl::MutexGuard aGuard (::osl::Mutex::getGlobalMutex());

    WindowList::const_iterator iDescriptor;
    for (iDescriptor=maWindowList.begin(); iDescriptor!=maWindowList.end(); ++iDescriptor)
        if (iDescriptor->first == rEvent.Source)
            break;
    if (iDescriptor != maWindowList.end())
    {
        // Choose pointer shape according to position in the window border.
        switch (ClassifyBorderElementUnderMouse(
            iDescriptor->first,
            iDescriptor->second,
            awt::Point(rEvent.X,rEvent.Y)))
        {
            case PresenterPaneBorderManager::Top:
                mnPointerType = awt::SystemPointer::MOVE;
                break;
            case PresenterPaneBorderManager::TopLeft:
                mnPointerType = awt::SystemPointer::WINDOW_NWSIZE;
                break;
            case PresenterPaneBorderManager::TopRight:
                mnPointerType = awt::SystemPointer::WINDOW_NESIZE;
                break;
            case PresenterPaneBorderManager::Left:
                mnPointerType = awt::SystemPointer::WINDOW_WSIZE;
                break;
            case PresenterPaneBorderManager::Right:
                mnPointerType = awt::SystemPointer::WINDOW_ESIZE;
                break;
            case PresenterPaneBorderManager::BottomLeft:
                mnPointerType = awt::SystemPointer::WINDOW_SWSIZE;
                break;
            case PresenterPaneBorderManager::BottomRight:
                mnPointerType = awt::SystemPointer::WINDOW_SESIZE;
                break;
            case PresenterPaneBorderManager::Bottom:
                mnPointerType = awt::SystemPointer::WINDOW_SSIZE;
                break;

            case PresenterPaneBorderManager::Content:
            case PresenterPaneBorderManager::Outside:
            default:
                mnPointerType = awt::SystemPointer::ARROW;
                break;
        }

        // Make the pointer shape visible.
        Reference<awt::XWindowPeer> xPeer (iDescriptor->first, UNO_QUERY);
        if (xPeer.is())
        {
            if (mxPointer.is())
                mxPointer->setType(mnPointerType);
            xPeer->setPointer(mxPointer);
        }
    }
}




void SAL_CALL PresenterPaneBorderManager::mouseDragged (const css::awt::MouseEvent& rEvent)
    throw (css::uno::RuntimeException)
{
    ThrowIfDisposed();
    ::osl::MutexGuard aGuard (::osl::Mutex::getGlobalMutex());

    if ( ! mxOuterDragWindow.is())
        return;

    CaptureMouse(mxOuterDragWindow);

    const awt::Rectangle aOldBox (mxOuterDragWindow->getPosSize());
    const sal_Int32 nX = rEvent.X + aOldBox.X;
    const sal_Int32 nY = rEvent.Y + aOldBox.Y;
    const sal_Int32 nDiffX = nX - maDragAnchor.X;
    const sal_Int32 nDiffY = nY - maDragAnchor.Y;
    maDragAnchor.X = nX;
    maDragAnchor.Y = nY;

    const sal_Int32 nOldRight = aOldBox.X + aOldBox.Width;
    const sal_Int32 nOldBottom = aOldBox.Y + aOldBox.Height;

    awt::Rectangle aBox (aOldBox);
    sal_Int32 nRight = aBox.X + aBox.Width;
    sal_Int32 nBottom = aBox.Y + aBox.Height;

    // Update position and/or size according to initial pointer position
    // inside the window border.
    switch (meDragType)
    {
        case PresenterPaneBorderManager::Top:
            aBox.X += nDiffX; aBox.Y += nDiffY;
            nRight += nDiffX; nBottom += nDiffY;
            break;
        case PresenterPaneBorderManager::TopLeft:
            aBox.X += nDiffX; aBox.Y += nDiffY;
            break;
        case PresenterPaneBorderManager::TopRight:
            nRight += nDiffX; aBox.Y += nDiffY;
            break;
        case PresenterPaneBorderManager::Left:
            aBox.X += nDiffX;
            break;
        case PresenterPaneBorderManager::Right:
            nRight += nDiffX;
            break;
        case PresenterPaneBorderManager::BottomLeft:
            aBox.X += nDiffX; nBottom += nDiffY;
            break;
        case PresenterPaneBorderManager::BottomRight:
            nRight += nDiffX; nBottom += nDiffY;
            break;
        case PresenterPaneBorderManager::Bottom:
            nBottom += nDiffY;
            break;
        default: break;
    }

    aBox.Width = nRight - aBox.X;
    aBox.Height = nBottom - aBox.Y;
    if (aBox.Width > 20
        && aBox.Height > 20)
    {
        // Set position and/or size of the border window to the new values.
        sal_Int16 nFlags (0);
        if (aBox.X != aOldBox.X)
            nFlags |= awt::PosSize::X;
        if (aBox.Y != aOldBox.Y)
            nFlags |= awt::PosSize::Y;
        if (aBox.Width != aOldBox.Width)
            nFlags |= awt::PosSize::WIDTH;
        if (aBox.Height != aOldBox.Height)
            nFlags |= awt::PosSize::HEIGHT;
        mxOuterDragWindow->setPosSize(aBox.X, aBox.Y, aBox.Width, aBox.Height, nFlags);

        // Invalidate that is or was covered by the border window before and
        // after the move/resize.
        Reference<awt::XWindowPeer> xPeer (mxParentWindow, UNO_QUERY);
        if (xPeer.is())
        {
            const sal_Int32 nLeft = ::std::min(aOldBox.X,aBox.X);
            const sal_Int32 nTop = ::std::min(aOldBox.Y,aBox.Y);
            const sal_Int32 nWidth = ::std::max(nOldRight,nRight) - nLeft;
            const sal_Int32 nHeight = ::std::max(nOldBottom,nBottom) - nTop;
            xPeer->invalidateRect(
                ::awt::Rectangle(nLeft,nTop,nWidth-1,nHeight-1),
                awt::InvalidateStyle::TRANSPARENT);
        }
    }
}




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

void SAL_CALL PresenterPaneBorderManager::disposing (const lang::EventObject& rEvent)
    throw (RuntimeException)
{
    WindowList::iterator iDescriptor;
    for (iDescriptor=maWindowList.begin(); iDescriptor!=maWindowList.end(); ++iDescriptor)
        if (iDescriptor->first == rEvent.Source)
        {
            maWindowList.erase(iDescriptor);
            break;
        }
}




//-----------------------------------------------------------------------------


void PresenterPaneBorderManager::CaptureMouse (const Reference<awt::XWindow>& rxWindow)
{
    if (mxPresenterHelper.is())
        mxPresenterHelper->captureMouse(rxWindow);
}




void PresenterPaneBorderManager::ReleaseMouse (const Reference<awt::XWindow>& rxWindow)
{
    if (mxPresenterHelper.is())
        mxPresenterHelper->releaseMouse(rxWindow);
}




void PresenterPaneBorderManager::ThrowIfDisposed (void)
    throw (::com::sun::star::lang::DisposedException)
{
    if (rBHelper.bDisposed || rBHelper.bInDispose)
    {
        throw lang::DisposedException (
            ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM(
                "PresenterPaneBorderManager object has already been disposed")),
            static_cast<uno::XWeak*>(this));
    }
}




} } // end of namespace ::sd::presenter