/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (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.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is Netscape Communications
 * Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */
#include "nsCOMPtr.h"
#include "nscore.h"
#include "nsCRT.h"
#include "nsIContentViewer.h"
#include "nsIPluginHost.h"
#include "nsIPluginInstance.h"
#include "nsIStreamListener.h"
#include "nsIURL.h"
#include "nsIChannel.h"
#include "nsNetUtil.h"
#include "nsIComponentManager.h"
#include "nsWidgetsCID.h"
#include "nsILinkHandler.h"
#include "nsIWebShell.h"
#include "nsIContentViewerEdit.h"
#include "nsIContentViewerFile.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIInterfaceRequestor.h"
#include "nsIDocShellTreeItem.h"
#include "nsIDocShellTreeOwner.h"
#include "nsIWebBrowserChrome.h"
#include "nsIDOMDocument.h"
#include "nsPluginViewer.h"

// Class IDs
static NS_DEFINE_IID(kChildWindowCID, NS_CHILD_CID);
static NS_DEFINE_IID(kIWidgetIID, NS_IWIDGET_IID);

// Interface IDs
static NS_DEFINE_IID(kIContentViewerIID, NS_ICONTENT_VIEWER_IID);
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kIPluginHostIID, NS_IPLUGINHOST_IID);
static NS_DEFINE_IID(kIPluginInstanceOwnerIID, NS_IPLUGININSTANCEOWNER_IID);
static NS_DEFINE_IID(kCPluginManagerCID, NS_PLUGINMANAGER_CID);
static NS_DEFINE_IID(kILinkHandlerIID, NS_ILINKHANDLER_IID);
static NS_DEFINE_IID(kIStreamListenerIID, NS_ISTREAMLISTENER_IID);
static NS_DEFINE_IID(kIWebShellIID, NS_IWEB_SHELL_IID);
static NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID);


class PluginViewerImpl;

class PluginListener : public nsIStreamListener {
public:
  PluginListener(PluginViewerImpl* aViewer);
  virtual ~PluginListener();

  // nsISupports
  NS_DECL_ISUPPORTS

  // nsIStreamObserver methods:
  NS_DECL_NSISTREAMOBSERVER

  // nsIStreamListener methods:
  NS_DECL_NSISTREAMLISTENER

  PluginViewerImpl* mViewer;
  nsIStreamListener* mNextStream;
};

class pluginInstanceOwner : public nsIPluginInstanceOwner
{
public:
  pluginInstanceOwner();
  virtual ~pluginInstanceOwner();

  NS_DECL_ISUPPORTS

  //nsIPluginInstanceOwner interface

  NS_IMETHOD SetInstance(nsIPluginInstance *aInstance);

  NS_IMETHOD GetInstance(nsIPluginInstance *&aInstance);

  NS_IMETHOD GetWindow(nsPluginWindow *&aWindow);

  NS_IMETHOD GetMode(nsPluginMode *aMode);

  NS_IMETHOD CreateWidget(void);

  NS_IMETHOD GetURL(const char *aURL, const char *aTarget, void *aPostData,
                    PRUint32 aPostDataLen);

  NS_IMETHOD ShowStatus(const char *aStatusMsg);

  NS_IMETHOD GetDocument(nsIDocument* *aDocument);

  //locals

  NS_IMETHOD Init(PluginViewerImpl *aViewer, nsIWidget *aWindow);

private:
  nsPluginWindow    mPluginWindow;
  nsIPluginInstance *mInstance;
  nsIWidget         *mWindow;       //we do not addref this...
  PluginViewerImpl  *mViewer;       //we do not addref this...
};

class PluginViewerImpl : public nsIContentViewer,
                         public nsIContentViewerEdit,
                         public nsIContentViewerFile
{
public:
  PluginViewerImpl(const char* aCommand);
  nsresult Init(nsIStreamListener** aDocListener);
    
  NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW

  // nsISupports
  NS_DECL_ISUPPORTS

  // nsIContentViewer
  NS_IMETHOD Init(nsIWidget* aParentWidget,
                  nsIDeviceContext* aDeviceContext,
                  const nsRect& aBounds);
  NS_IMETHOD BindToDocument(nsISupports* aDoc, const char* aCommand);
  NS_IMETHOD SetContainer(nsISupports* aContainer);
  NS_IMETHOD GetContainer(nsISupports** aContainerResult);
  NS_IMETHOD LoadComplete(nsresult aStatus);
  NS_IMETHOD Destroy(void);
  NS_IMETHOD Stop(void);
  NS_IMETHOD GetDOMDocument(nsIDOMDocument **aResult);
  NS_IMETHOD SetDOMDocument(nsIDOMDocument *aDocument);
  NS_IMETHOD GetBounds(nsRect& aResult);
  NS_IMETHOD SetBounds(const nsRect& aBounds);
  NS_IMETHOD Move(PRInt32 aX, PRInt32 aY);
  NS_IMETHOD Show();
  NS_IMETHOD Hide();
  NS_IMETHOD SetEnableRendering(PRBool aOn);
  NS_IMETHOD GetEnableRendering(PRBool* aResult);

  // nsIContentViewerEdit
  NS_DECL_NSICONTENTVIEWEREDIT

  // nsIContentViewerFile
  NS_DECL_NSICONTENTVIEWERFILE

  virtual ~PluginViewerImpl();

  nsresult CreatePlugin(nsIPluginHost* aHost, const nsRect& aBounds,
                        nsIStreamListener*& aResult);

  nsresult MakeWindow(nsNativeWidget aParent,
                      nsIDeviceContext* aDeviceContext,
                      const nsRect& aBounds);

  nsresult StartLoad(nsIChannel* channel, nsIStreamListener*& aResult);

  void ForceRefresh(void);

  nsresult GetURI(nsIURI* *aURI);

  nsresult GetDocument(nsIDocument* *aDocument);

  nsIWidget* mWindow;
  nsIDocument* mDocument;
  nsCOMPtr<nsISupports> mContainer;
  nsIChannel* mChannel;
  pluginInstanceOwner *mOwner;
  PRBool mEnableRendering;
};

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

nsresult
NS_NewPluginContentViewer(const char* aCommand,
                          nsIStreamListener** aDocListener,
                          nsIContentViewer** aDocViewer)
{
  PluginViewerImpl* it = new PluginViewerImpl(aCommand);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  nsresult rv = it->Init(aDocListener);
  if (NS_FAILED(rv)) {
    delete it;
    return rv;
  }
  return it->QueryInterface(kIContentViewerIID, (void**) aDocViewer);
}

// Note: operator new zeros our memory
PluginViewerImpl::PluginViewerImpl(const char* aCommand)
{
  NS_INIT_REFCNT();
  mEnableRendering = PR_TRUE;
}

nsresult
PluginViewerImpl::Init(nsIStreamListener** aDocListener)
{
  nsIStreamListener* it = new PluginListener(this);
  if (it == nsnull)
    return NS_ERROR_OUT_OF_MEMORY;
  NS_ADDREF(it);
  *aDocListener = it;
  return NS_OK;
}

// ISupports implementation...
NS_IMPL_ADDREF(PluginViewerImpl)
NS_IMPL_RELEASE(PluginViewerImpl)

nsresult
PluginViewerImpl::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
  if (NULL == aInstancePtr) {
    return NS_ERROR_NULL_POINTER;
  }

  if (aIID.Equals(kIContentViewerIID)) {
    nsIContentViewer* tmp = this;
    *aInstancePtr = (void*)tmp;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  if (aIID.Equals(kISupportsIID)) {
    nsIContentViewer* tmp1 = this;
    nsISupports* tmp2 = tmp1;
    *aInstancePtr = (void*) tmp2;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  return NS_NOINTERFACE;
}

PluginViewerImpl::~PluginViewerImpl()
{
  NS_IF_RELEASE(mOwner);
  if (nsnull != mWindow) {
    mWindow->Destroy();
    NS_RELEASE(mWindow);
  }
  NS_IF_RELEASE(mDocument);
  NS_IF_RELEASE(mChannel);
}

/*
 * This method is called by the Document Loader once a document has
 * been created for a particular data stream...  The content viewer
 * must cache this document for later use when Init(...) is called.
 */
NS_IMETHODIMP
PluginViewerImpl::BindToDocument(nsISupports *aDoc, const char *aCommand)
{
#ifdef NS_DEBUG
  printf("PluginViewerImpl::BindToDocument\n");
#endif
  return aDoc->QueryInterface(kIDocumentIID, (void**)&mDocument);
  return NS_OK;
}

NS_IMETHODIMP
PluginViewerImpl::SetContainer(nsISupports* aContainer)
{
  mContainer = aContainer;
  return NS_OK;
}

NS_IMETHODIMP
PluginViewerImpl::GetContainer(nsISupports** aResult)
{
   NS_ENSURE_ARG_POINTER(aResult);

   *aResult = mContainer;
   NS_IF_ADDREF(*aResult);

   return NS_OK;
}


NS_IMETHODIMP
PluginViewerImpl::Init(nsIWidget* aParentWidget,
                       nsIDeviceContext* aDeviceContext,
                       const nsRect& aBounds)
{
  nsresult rv = MakeWindow(aParentWidget->GetNativeData(NS_NATIVE_WIDGET),
   aDeviceContext, aBounds);
  if (NS_OK == rv) {
    mOwner = new pluginInstanceOwner();
    if (nsnull != mOwner) {
      NS_ADDREF(mOwner);
      rv = mOwner->Init(this, mWindow);
    }
  }
  return rv;
}

nsresult
PluginViewerImpl::StartLoad(nsIChannel* channel, nsIStreamListener*& aResult)
{
  NS_IF_RELEASE(mChannel);
  mChannel = channel;
  NS_ADDREF(mChannel);

#ifdef DEBUG
  char* contentType;
  mChannel->GetContentType(&contentType);
  printf("PluginViewerImpl::StartLoad: content-type=%s\n", contentType);
  nsCRT::free(contentType);
#endif

  aResult = nsnull;

  // Only instantiate the plugin if our container can host it
  nsCOMPtr<nsIPluginHost> host;

  host = do_GetService(kCPluginManagerCID);
  nsresult rv = NS_ERROR_FAILURE;
  if(host) 
  {
    nsRect r;
    mWindow->GetClientBounds(r);
    rv = CreatePlugin(host, nsRect(0, 0, r.width, r.height), aResult);
  }

  return rv;
}

nsresult
PluginViewerImpl::CreatePlugin(nsIPluginHost* aHost, const nsRect& aBounds,
                               nsIStreamListener*& aResult)
{
  nsresult rv = NS_OK;

  if (nsnull != mOwner) {
    nsPluginWindow  *win;

    mOwner->GetWindow(win);

    win->x = aBounds.x;
    win->y = aBounds.y;
    win->width = aBounds.width;
    win->height = aBounds.height;
    win->clipRect.top = aBounds.y;
    win->clipRect.left = aBounds.x;
    win->clipRect.bottom = aBounds.YMost();
    win->clipRect.right = aBounds.XMost();
  #ifdef XP_UNIX
    win->ws_info = nsnull;   //XXX need to figure out what this is. MMP
  #endif

    nsIURI* uri;
    rv = mChannel->GetURI(&uri);
    if (NS_FAILED(rv)) return rv;

    char* spec;
    rv = uri->GetSpec(&spec);
    NS_RELEASE(uri);
    if (NS_FAILED(rv)) return rv;
    nsAutoString str; str.AssignWithConversion(spec);
    nsCRT::free(spec);

    char* ct;
    rv = mChannel->GetContentType(&ct);
    if (NS_FAILED(rv)) return rv;
    rv = aHost->InstantiateFullPagePlugin(ct, str, aResult, mOwner);
    delete[] ct;
  }

  return rv;
}

NS_IMETHODIMP
PluginViewerImpl::Stop(void)
{
  // XXX write this
  return NS_OK;
}

NS_IMETHODIMP
PluginViewerImpl::LoadComplete(nsresult aStatus)
{
  return NS_ERROR_FAILURE;
}

NS_IMETHODIMP
PluginViewerImpl::Destroy(void)
{
  return NS_ERROR_FAILURE;
}

NS_IMETHODIMP
PluginViewerImpl::GetDOMDocument(nsIDOMDocument **aResult)
{
  return CallQueryInterface(mDocument, aResult);
}

NS_IMETHODIMP
PluginViewerImpl::SetDOMDocument(nsIDOMDocument *aDocument)
{
  return NS_ERROR_FAILURE;
}

static nsEventStatus PR_CALLBACK
HandlePluginEvent(nsGUIEvent *aEvent)
{
  if( (*aEvent).message == NS_PLUGIN_ACTIVATE) {
    (nsIWidget*)((*aEvent).widget)->SetFocus();
  }
  return nsEventStatus_eIgnore;
}
nsresult
PluginViewerImpl::MakeWindow(nsNativeWidget aParent,
                             nsIDeviceContext* aDeviceContext,
                             const nsRect& aBounds)
{
  nsresult rv =
    nsComponentManager::CreateInstance(kChildWindowCID, nsnull, kIWidgetIID,
                                 (void**)&mWindow);
  if (NS_OK != rv) {
    return rv;
  }
  mWindow->Create(aParent, aBounds, HandlePluginEvent, aDeviceContext);
  return rv;
}

NS_IMETHODIMP
PluginViewerImpl::GetBounds(nsRect& aResult)
{
  NS_PRECONDITION(nsnull != mWindow, "null window");
  if (nsnull != mWindow) {
    mWindow->GetBounds(aResult);
  }
  else {
    aResult.SetRect(0, 0, 0, 0);
  }
  return NS_OK;
}

NS_IMETHODIMP
PluginViewerImpl::SetBounds(const nsRect& aBounds)
{
  NS_PRECONDITION(nsnull != mWindow, "null window");
  if (nsnull != mWindow) {
    // Don't have the widget repaint. Layout will generate repaint requests
    // during reflow
    nsIPluginInstance *inst;
    mWindow->Resize(aBounds.x, aBounds.y, aBounds.width, aBounds.height, PR_FALSE);
    if ((nsnull != mOwner) && (NS_OK == mOwner->GetInstance(inst)) && (nsnull != inst)) {
      nsPluginWindow  *win;
      if (NS_OK == mOwner->GetWindow(win)) {
        win->x = aBounds.x;
        win->y = aBounds.y;
        win->width = aBounds.width;
        win->height = aBounds.height;
        win->clipRect.top = aBounds.y;
        win->clipRect.left = aBounds.x;
        win->clipRect.bottom = aBounds.YMost();
        win->clipRect.right = aBounds.XMost();

        inst->SetWindow(win);
      }
      NS_RELEASE(inst);
    }
  }
  return NS_OK;
}

NS_IMETHODIMP
PluginViewerImpl::Move(PRInt32 aX, PRInt32 aY)
{
  NS_PRECONDITION(nsnull != mWindow, "null window");
  if (nsnull != mWindow) {
    nsIPluginInstance *inst;
    mWindow->Move(aX, aY);
    if ((nsnull != mOwner) && (NS_OK == mOwner->GetInstance(inst)) && (nsnull != inst)) {
      nsPluginWindow  *win;
      if (NS_OK == mOwner->GetWindow(win)) {
        win->x = aX;
        win->y = aY;
        win->clipRect.bottom = (win->clipRect.bottom - win->clipRect.top) + aY;
        win->clipRect.right = (win->clipRect.right - win->clipRect.left) + aX;
        win->clipRect.top = aY;
        win->clipRect.left = aX;

        inst->SetWindow(win);
      }
      NS_RELEASE(inst);
    }
  }
  return NS_OK;
}

NS_IMETHODIMP
PluginViewerImpl::Show()
{
  NS_PRECONDITION(nsnull != mWindow, "null window");
  if (nsnull != mWindow) {
    mWindow->Show(PR_TRUE);
  }

  // XXX should we call SetWindow here?

  return NS_OK;
}

NS_IMETHODIMP
PluginViewerImpl::Hide()
{
  NS_PRECONDITION(nsnull != mWindow, "null window");
  if (nsnull != mWindow) {
    mWindow->Show(PR_FALSE);
  }

  // should we call SetWindow(nsnull) here?

  return NS_OK;
}

NS_IMETHODIMP
PluginViewerImpl::SetEnableRendering(PRBool aOn)
{
  mEnableRendering = aOn;
  return NS_OK;
}

NS_IMETHODIMP
PluginViewerImpl::GetEnableRendering(PRBool* aResult)
{
  NS_PRECONDITION(nsnull != aResult, "null OUT ptr");
  if (aResult) {
    *aResult = mEnableRendering;
  }
  return NS_OK;
}

void
PluginViewerImpl::ForceRefresh()
{
  mWindow->Invalidate(PR_TRUE);
}

nsresult PluginViewerImpl::GetURI(nsIURI* *aURI)
{
  return mChannel->GetURI(aURI);
}

nsresult PluginViewerImpl::GetDocument(nsIDocument* *aDocument)
{
  NS_IF_ADDREF(mDocument);
  *aDocument = mDocument;
  return NS_OK;
}

/* ========================================================================================
 * nsIContentViewerFile
 * ======================================================================================== */

NS_IMETHODIMP PluginViewerImpl::Search()
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP PluginViewerImpl::GetSearchable(PRBool *aSearchable)
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP PluginViewerImpl::ClearSelection()
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP PluginViewerImpl::SelectAll()
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP PluginViewerImpl::CopySelection()
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP PluginViewerImpl::GetCopyable(PRBool *aCopyable)
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP PluginViewerImpl::CutSelection()
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP PluginViewerImpl::GetCutable(PRBool *aCutable)
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP PluginViewerImpl::Paste()
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP PluginViewerImpl::GetPasteable(PRBool *aPasteable)
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

/* ========================================================================================
 * nsIContentViewerEdit
 * ======================================================================================== */
NS_IMETHODIMP
PluginViewerImpl::Save()
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
PluginViewerImpl::GetSaveable(PRBool *aSaveable)
{
  NS_ASSERTION(0, "NOT IMPLEMENTED");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
PluginViewerImpl::Print(PRBool aSilent,FILE *aFile, nsIPrintListener *aPrintListener)
{
  return NS_OK;      // XXX: hey, plug in guys!  implement me!
}


NS_IMETHODIMP
PluginViewerImpl::GetPrintable(PRBool *aPrintable) 
{
  NS_ENSURE_ARG_POINTER(aPrintable);

  *aPrintable = PR_FALSE;   // XXX: hey, plug in guys!  implement me!
  return NS_OK;
}


NS_IMETHODIMP
PluginViewerImpl::PrintContent(nsIWebShell *aParent, nsIDeviceContext *aDContext)
{
  NS_ENSURE_ARG_POINTER(aParent);
  NS_ENSURE_ARG_POINTER(aDContext);

  return NS_OK;
}


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

PluginListener::PluginListener(PluginViewerImpl* aViewer)
{
  NS_INIT_REFCNT();
  mViewer = aViewer;
  NS_ADDREF(aViewer);
}

PluginListener::~PluginListener()
{
  NS_RELEASE(mViewer);
  NS_IF_RELEASE(mNextStream);
}

NS_IMPL_ISUPPORTS(PluginListener, kIStreamListenerIID)

NS_IMETHODIMP
PluginListener::OnStartRequest(nsIChannel* channel, nsISupports *ctxt)
{
  nsresult rv;
  char* contentType = nsnull;

  rv = channel->GetContentType(&contentType);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = mViewer->StartLoad(channel, mNextStream);

  if (NS_FAILED(rv)) {
    return rv;
  }
  if (nsnull == mNextStream) 
    return NS_ERROR_FAILURE;
  return mNextStream->OnStartRequest(channel, ctxt);
}

NS_IMETHODIMP
PluginListener::OnStopRequest(nsIChannel* channel, nsISupports *ctxt,
                              nsresult status, const PRUnichar *errorMsg)
{
  if (nsnull == mNextStream) {
    return NS_ERROR_FAILURE;
  }
  return mNextStream->OnStopRequest(channel, ctxt, status, errorMsg);
}

NS_IMETHODIMP
PluginListener::OnDataAvailable(nsIChannel* channel, nsISupports *ctxt,
                                nsIInputStream *inStr, PRUint32 sourceOffset, PRUint32 count)
{
  if (nsnull == mNextStream) {
    return NS_ERROR_FAILURE;
  }
  return mNextStream->OnDataAvailable(channel, ctxt, inStr, sourceOffset, count);
}

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

pluginInstanceOwner :: pluginInstanceOwner()
{
  NS_INIT_REFCNT();

  memset(&mPluginWindow, 0, sizeof(mPluginWindow));
  mInstance = nsnull;
  mWindow = nsnull;
  mViewer = nsnull;
}

pluginInstanceOwner :: ~pluginInstanceOwner()
{
  if (nsnull != mInstance)
  {
    mInstance->Stop();
    nsCOMPtr<nsIPluginHost> host;
    host = do_GetService(kCPluginManagerCID);
    if(host)
      host->StopPluginInstance(mInstance);
    NS_RELEASE(mInstance);
  }

  mWindow = nsnull;
  mViewer = nsnull;
}

NS_IMPL_ISUPPORTS(pluginInstanceOwner, kIPluginInstanceOwnerIID);

NS_IMETHODIMP pluginInstanceOwner :: SetInstance(nsIPluginInstance *aInstance)
{
  NS_IF_RELEASE(mInstance);
  mInstance = aInstance;
  NS_IF_ADDREF(mInstance);

  return NS_OK;
}

NS_IMETHODIMP pluginInstanceOwner :: GetInstance(nsIPluginInstance *&aInstance)
{
  NS_IF_ADDREF(mInstance);
  aInstance = mInstance;

  return NS_OK;
}

NS_IMETHODIMP pluginInstanceOwner :: GetWindow(nsPluginWindow *&aWindow)
{
  aWindow = &mPluginWindow;
  return NS_OK;
}

NS_IMETHODIMP pluginInstanceOwner :: GetMode(nsPluginMode *aMode)
{
  *aMode = nsPluginMode_Full;
  return NS_OK;
}

NS_IMETHODIMP pluginInstanceOwner :: CreateWidget(void)
{
  PRBool    windowless;

  if (nsnull != mInstance)
  {
    mInstance->GetValue(nsPluginInstanceVariable_WindowlessBool, (void *)&windowless);

    if (PR_TRUE == windowless)
    {
      mPluginWindow.window = nsnull;    //XXX this needs to be a HDC
      mPluginWindow.type = nsPluginWindowType_Drawable;
    }
    else if (nsnull != mWindow)
    {
      mPluginWindow.window = (nsPluginPort *)mWindow->GetNativeData(NS_NATIVE_PLUGIN_PORT);
      mPluginWindow.type = nsPluginWindowType_Window;
    }
    else
      return NS_ERROR_FAILURE;
  }
  else
    return NS_ERROR_FAILURE;

  return NS_OK;
}

NS_IMETHODIMP pluginInstanceOwner :: GetURL(const char *aURL, const char *aTarget, void *aPostData, PRUint32 aPostDataLen)
{
  nsresult  rv;

  if (nsnull != mViewer)
  {
    nsCOMPtr<nsISupports> cont;

    rv = mViewer->GetContainer(getter_AddRefs(cont));

    if (NS_OK == rv)
    {
      nsCOMPtr<nsILinkHandler> lh(do_QueryInterface(cont));

      if (lh)
      {
        nsCOMPtr<nsIURI> uri;
        rv = mViewer->GetURI(getter_AddRefs(uri));

        if (NS_OK == rv)
        {
          // Create an absolute URL
          char* absURIStr;
          rv = NS_MakeAbsoluteURI(&absURIStr, aURL, uri);
          nsAutoString fullurl; fullurl.AssignWithConversion(absURIStr);
          nsCRT::free(absURIStr);

          if (NS_OK == rv) {
            nsAutoString  unitarget; unitarget.AssignWithConversion(aTarget);
            rv = lh->OnLinkClick(nsnull, eLinkVerb_Replace, fullurl.GetUnicode(), unitarget.GetUnicode(), nsnull);
          }
        }
      }
    }
  }
  else
    rv = NS_ERROR_FAILURE;

  return rv;
}

NS_IMETHODIMP pluginInstanceOwner :: ShowStatus(const char *aStatusMsg)
{
  nsresult  rv = NS_ERROR_FAILURE;

  if (nsnull != mViewer)
  {
    nsCOMPtr<nsISupports> cont;

    rv = mViewer->GetContainer(getter_AddRefs(cont));

    if ((NS_OK == rv) && (nsnull != cont))
    {
      nsCOMPtr<nsIDocShellTreeItem> docShellItem(do_QueryInterface(cont));

      if (docShellItem)
      {
        nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
        docShellItem->GetTreeOwner(getter_AddRefs(treeOwner));

        if(treeOwner)
        {
        nsCOMPtr<nsIWebBrowserChrome> browserChrome(do_GetInterface(treeOwner));

        if(browserChrome)
          {
          nsAutoString  msg; msg.AssignWithConversion(aStatusMsg);
          browserChrome->SetStatus(nsIWebBrowserChrome::STATUS_SCRIPT, msg.GetUnicode());
          }
        }
      }
    }
  }

  return rv;
}

NS_IMETHODIMP pluginInstanceOwner :: GetDocument(nsIDocument* *aDocument)
{
	return mViewer->GetDocument(aDocument);
}

NS_IMETHODIMP pluginInstanceOwner :: Init(PluginViewerImpl *aViewer, nsIWidget *aWindow)
{
  //do not addref
  mWindow = aWindow;
  mViewer = aViewer;

  return NS_OK;
}