/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.0 (the "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 *
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */

#include "ns4xPluginInstance.h"
#include "ns4xPluginStream.h"
#include "prlog.h"

////////////////////////////////////////////////////////////////////////


ns4xPluginInstance :: ns4xPluginInstance(NPPluginFuncs* callbacks)
    : fCallbacks(callbacks)
{
    NS_INIT_REFCNT();

    NS_ASSERTION(fCallbacks != NULL, "null callbacks");

    // Initialize the NPP structure.

    fNPP.pdata = NULL;
    fNPP.ndata = this;

    fPeer = nsnull;

    mWindowless = PR_FALSE;
    mTransparent = PR_FALSE;
}


ns4xPluginInstance :: ~ns4xPluginInstance(void)
{
    NS_RELEASE(fPeer);
}

////////////////////////////////////////////////////////////////////////

NS_IMPL_ADDREF(ns4xPluginInstance);
NS_IMPL_RELEASE(ns4xPluginInstance);

static NS_DEFINE_IID(kIPluginInstanceIID, NS_IPLUGININSTANCE_IID); 
static NS_DEFINE_IID(kIEventHandlerIID, NS_IEVENTHANDLER_IID); 
static NS_DEFINE_IID(kIPluginTagInfoIID, NS_IPLUGINTAGINFO_IID); 
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);

NS_IMETHODIMP ns4xPluginInstance :: QueryInterface(const nsIID& iid, void** instance)
{
    if (instance == NULL)
        return NS_ERROR_NULL_POINTER;

    if (iid.Equals(kIPluginInstanceIID))
    {
        *instance = (void *)(nsIPluginInstance *)this;
        AddRef();
        return NS_OK;
    }

    if (iid.Equals(kIEventHandlerIID))
    {
        *instance = (void *)(nsIEventHandler *)this;
        AddRef();
        return NS_OK;
    }

    if (iid.Equals(kISupportsIID))
    {
        *instance = (void *)(nsISupports *)this;
        AddRef();
        return NS_OK;
    }

    return NS_NOINTERFACE;
}


////////////////////////////////////////////////////////////////////////

NS_IMETHODIMP ns4xPluginInstance :: Initialize(nsIPluginInstancePeer* peer)
{
    PRUint16 count;
    const char* const* names;
    const char* const* values;

    NS_ASSERTION(peer != NULL, "null peer");

    fPeer = peer;

    NS_ADDREF(fPeer);

    nsresult error;
    nsIPluginTagInfo  *taginfo;

    error = fPeer->QueryInterface(kIPluginTagInfoIID, (void **)&taginfo);

    if (NS_OK == error)
    {
      if ((error = taginfo->GetAttributes(count, names, values)) != NS_OK)
          return error;

      if (fCallbacks->newp == NULL)
          return NS_ERROR_FAILURE; // XXX right error?
        
      // XXX Note that the NPPluginType_* enums were crafted to be
      // backward compatible...

      nsPluginMode  mode;
      nsMIMEType    mimetype;

      fPeer->GetMode(&mode);
      fPeer->GetMIMEType(&mimetype);

      error = (nsresult)
          CallNPP_NewProc(fCallbacks->newp,
                          (char *)mimetype,
                          &fNPP,
                          (PRUint16)mode,
                          count,
                          (char**)names,
                          (char**)values,
                          NULL); // saved data

      NS_RELEASE(taginfo);
    }

    return error;
}

NS_IMETHODIMP ns4xPluginInstance :: GetPeer(nsIPluginInstancePeer* *resultingPeer)
{
  NS_ADDREF(fPeer);
  *resultingPeer = fPeer;

  return NS_OK;
}

NS_IMETHODIMP ns4xPluginInstance::Start(void)
{
    // XXX At some point, we maybe should implement start and stop to
    // load/unload the 4.x plugin, just in case there are some plugins
    // that rely on that behavior...
printf("instance start called\n");
    return NS_OK;
}

NS_IMETHODIMP ns4xPluginInstance::Stop(void)
{
printf("instance stop called\n");
    return NS_OK;
}

NS_IMETHODIMP ns4xPluginInstance::Destroy(void)
{
    nsresult error;

printf("instance destroy called\n");
    if (fCallbacks->destroy == NULL)
        return NS_ERROR_FAILURE; // XXX right error?

    NPSavedData *sdata;

    error = (nsresult)CallNPP_DestroyProc(fCallbacks->destroy,
                                          &fNPP, &sdata); // saved data

    return error;
}

NS_IMETHODIMP ns4xPluginInstance::SetWindow(nsPluginWindow* window)
{
    // XXX 4.x plugins don't want a SetWindow(NULL).

    if (window == NULL)
        return NS_OK;

    nsresult error = NS_OK;

    if (fCallbacks->setwindow)
    {
        // XXX Turns out that NPPluginWindow and NPWindow are structurally
        // identical (on purpose!), so there's no need to make a copy.

        error = (nsresult) CallNPP_SetWindowProc(fCallbacks->setwindow,
                                                 &fNPP,
                                                 (NPWindow*) window);

        // XXX In the old code, we'd just ignore any errors coming
        // back from the plugin's SetWindow(). Is this the correct
        // behavior?!?

        if (error != NS_OK)
          printf("error in setwindow %d\n", error);
    }

    return error;
}

NS_IMETHODIMP ns4xPluginInstance::NewStream(nsIPluginStreamPeer* peer, nsIPluginStream* *result)
{
    (*result) = NULL;

    ns4xPluginStream* stream = new ns4xPluginStream(); 

    if (stream == NULL)
        return NS_ERROR_OUT_OF_MEMORY;

    NS_ADDREF(stream);

    nsresult error;

    // does it need the peer?

    if ((error = stream->Initialize(this, peer)) != NS_OK)
    {
        NS_RELEASE(stream);
        return error;
    }

    (*result) = stream;
    return NS_OK;
}

NS_IMETHODIMP ns4xPluginInstance::Print(nsPluginPrint* platformPrint)
{
printf("instance print called\n");
  return NS_OK;
}

NS_IMETHODIMP ns4xPluginInstance::HandleEvent(nsPluginEvent* event, PRBool* handled)
{
printf("instance handleevent called\n");
    *handled = PR_FALSE;

    return NS_OK;
}

NS_IMETHODIMP ns4xPluginInstance::URLNotify(const char* url, const char* target,
                                           nsPluginReason reason, void* notifyData)
{
    if (fCallbacks->urlnotify != NULL)
    {
        CallNPP_URLNotifyProc(fCallbacks->urlnotify,
                              &fNPP,
                              url,
                              reason,
                              notifyData);
    }

    return NS_OK; //XXX this seems bad...
}

NS_IMETHODIMP ns4xPluginInstance :: GetValue(nsPluginInstanceVariable variable, void *value)
{
  nsresult  rv = NS_OK;

  switch (variable)
  {
    case nsPluginInstanceVariable_WindowlessBool:
      *(PRBool *)value = mWindowless;
      break;

    case nsPluginInstanceVariable_TransparentBool:
      *(PRBool *)value = mTransparent;
      break;

    default:
      rv = NS_ERROR_FAILURE;    //XXX this is bad
  }

  return rv;
}

NS_IMETHODIMP ns4xPluginInstance :: SetWindowless(PRBool aWindowless)
{
  mWindowless = aWindowless;
  return NS_OK;
}

NS_IMETHODIMP ns4xPluginInstance :: SetTransparent(PRBool aTransparent)
{
  mTransparent = aTransparent;
  return NS_OK;
}