/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: sw=4 ts=4 et :
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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 Plugin App.
 *
 * The Initial Developer of the Original Code is
 *   Ben Turner <bent.mozilla@gmail.com>.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Chris Jones <jones.chris.g@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifdef MOZ_WIDGET_QT
#include <QApplication>
#endif

#include "mozilla/plugins/PluginModuleChild.h"

#ifdef MOZ_WIDGET_GTK2
#include <gtk/gtk.h>
#endif

#include "nsILocalFile.h"

#include "pratom.h"
#include "nsDebug.h"
#include "nsCOMPtr.h"
#include "nsPluginsDir.h"
#include "nsXULAppAPI.h"

#include "mozilla/plugins/PluginInstanceChild.h"
#include "mozilla/plugins/StreamNotifyChild.h"
#include "mozilla/plugins/BrowserStreamChild.h"
#include "mozilla/plugins/PluginStreamChild.h"
#include "mozilla/plugins/PluginThreadChild.h"
#include "PluginIdentifierChild.h"

#include "nsNPAPIPlugin.h"

using namespace mozilla::plugins;

namespace {
PluginModuleChild* gInstance = nsnull;
#ifdef MOZ_WIDGET_QT
static QApplication *gQApp = nsnull;
#endif
}


PluginModuleChild::PluginModuleChild() :
    mLibrary(0),
    mInitializeFunc(0),
    mShutdownFunc(0)
#ifdef OS_WIN
  , mGetEntryPointsFunc(0)
#elif defined(MOZ_WIDGET_GTK2)
  , mNestedLoopTimerId(0)
#endif
{
    NS_ASSERTION(!gInstance, "Something terribly wrong here!");
    memset(&mFunctions, 0, sizeof(mFunctions));
    memset(&mSavedData, 0, sizeof(mSavedData));
    gInstance = this;
}

PluginModuleChild::~PluginModuleChild()
{
    NS_ASSERTION(gInstance == this, "Something terribly wrong here!");
    if (mLibrary) {
        PR_UnloadLibrary(mLibrary);
    }
#ifdef MOZ_WIDGET_QT
    if (gQApp)
        delete gQApp;
    gQApp = nsnull;
#endif
    gInstance = nsnull;
}

// static
PluginModuleChild*
PluginModuleChild::current()
{
    NS_ASSERTION(gInstance, "Null instance!");
    return gInstance;
}

bool
PluginModuleChild::Init(const std::string& aPluginFilename,
                        base::ProcessHandle aParentProcessHandle,
                        MessageLoop* aIOLoop,
                        IPC::Channel* aChannel)
{
    PLUGIN_LOG_DEBUG_METHOD;

    NS_ASSERTION(aChannel, "need a channel");

    if (!mObjectMap.Init()) {
       NS_WARNING("Failed to initialize object hashtable!");
       return false;
    }

    if (!mStringIdentifiers.Init()) {
       NS_ERROR("Failed to initialize string identifier hashtable!");
       return false;
    }

    if (!mIntIdentifiers.Init()) {
       NS_ERROR("Failed to initialize int identifier hashtable!");
       return false;
    }

    if (!InitGraphics())
        return false;

    nsCString filename;
    filename = aPluginFilename.c_str();
    nsCOMPtr<nsILocalFile> pluginFile;
    NS_NewNativeLocalFile(filename,
                          PR_TRUE,
                          getter_AddRefs(pluginFile));

    PRBool exists;
    pluginFile->Exists(&exists);
    NS_ASSERTION(exists, "plugin file ain't there");

    nsCOMPtr<nsIFile> pluginIfile;
    pluginIfile = do_QueryInterface(pluginFile);

    nsPluginFile lib(pluginIfile);

    nsresult rv = lib.LoadPlugin(mLibrary);
    NS_ASSERTION(NS_OK == rv, "trouble with mPluginFile");
    NS_ASSERTION(mLibrary, "couldn't open shared object");

    if (!Open(aChannel, aParentProcessHandle, aIOLoop))
        return false;

    memset((void*) &mFunctions, 0, sizeof(mFunctions));
    mFunctions.size = sizeof(mFunctions);

    // TODO: use PluginPRLibrary here

#if defined(OS_LINUX)
    mShutdownFunc =
        (NP_PLUGINSHUTDOWN) PR_FindFunctionSymbol(mLibrary, "NP_Shutdown");

    // create the new plugin handler

    mInitializeFunc =
        (NP_PLUGINUNIXINIT) PR_FindFunctionSymbol(mLibrary, "NP_Initialize");
    NS_ASSERTION(mInitializeFunc, "couldn't find NP_Initialize()");

#elif defined(OS_WIN)
    mShutdownFunc =
        (NP_PLUGINSHUTDOWN)PR_FindFunctionSymbol(mLibrary, "NP_Shutdown");

    mGetEntryPointsFunc =
        (NP_GETENTRYPOINTS)PR_FindSymbol(mLibrary, "NP_GetEntryPoints");
    NS_ENSURE_TRUE(mGetEntryPointsFunc, false);

    mInitializeFunc =
        (NP_PLUGININIT)PR_FindFunctionSymbol(mLibrary, "NP_Initialize");
    NS_ENSURE_TRUE(mInitializeFunc, false);
#elif defined(OS_MACOSX)
#  warning IMPLEMENT ME

#else

#  error Please copy the initialization code from nsNPAPIPlugin.cpp

#endif
    return true;
}

#if defined(MOZ_WIDGET_GTK2)
typedef void (*GObjectDisposeFn)(GObject*);
typedef gboolean (*GtkWidgetScrollEventFn)(GtkWidget*, GdkEventScroll*);
typedef void (*GtkPlugEmbeddedFn)(GtkPlug*);

static GObjectDisposeFn real_gtk_plug_dispose;
static GtkPlugEmbeddedFn real_gtk_plug_embedded;

static void
undo_bogus_unref(gpointer data, GObject* object, gboolean is_last_ref) {
    if (!is_last_ref) // recursion in g_object_ref
        return;

    g_object_ref(object);
}

static void
wrap_gtk_plug_dispose(GObject* object) {
    // Work around Flash Player bug described in bug 538914.
    //
    // This function is called during gtk_widget_destroy and/or before
    // the object's last reference is removed.  A reference to the
    // object is held during the call so the ref count should not drop
    // to zero.  However, Flash Player tries to destroy the GtkPlug
    // using g_object_unref instead of gtk_widget_destroy.  The
    // reference that Flash is removing actually belongs to the
    // GtkPlug.  During real_gtk_plug_dispose, the GtkPlug removes its
    // reference.
    //
    // A toggle ref is added to prevent premature deletion of the object
    // caused by Flash Player's extra unref, and to detect when there are
    // unexpectedly no other references.
    g_object_add_toggle_ref(object, undo_bogus_unref, NULL);
    (*real_gtk_plug_dispose)(object);
    g_object_remove_toggle_ref(object, undo_bogus_unref, NULL);
}

static gboolean
gtk_plug_scroll_event(GtkWidget *widget, GdkEventScroll *gdk_event)
{
    if (!GTK_WIDGET_TOPLEVEL(widget)) // in same process as its GtkSocket
        return FALSE; // event not handled; propagate to GtkSocket

    GdkWindow* socket_window = GTK_PLUG(widget)->socket_window;
    if (!socket_window)
        return FALSE;

    // Propagate the event to the embedder.
    GdkScreen* screen = gdk_drawable_get_screen(socket_window);
    GdkWindow* plug_window = widget->window;
    GdkWindow* event_window = gdk_event->window;
    gint x = gdk_event->x;
    gint y = gdk_event->y;
    unsigned int button;
    unsigned int button_mask = 0;
    XEvent xevent;
    Display* dpy = GDK_WINDOW_XDISPLAY(socket_window);

    /* Translate the event coordinates to the plug window,
     * which should be aligned with the socket window.
     */
    while (event_window != plug_window)
    {
        gint dx, dy;

        gdk_window_get_position(event_window, &dx, &dy);
        x += dx;
        y += dy;

        event_window = gdk_window_get_parent(event_window);
        if (!event_window)
            return FALSE;
    }

    switch (gdk_event->direction) {
    case GDK_SCROLL_UP:
        button = 4;
        button_mask = Button4Mask;
        break;
    case GDK_SCROLL_DOWN:
        button = 5;
        button_mask = Button5Mask;
        break;
    case GDK_SCROLL_LEFT:
        button = 6;
        break;
    case GDK_SCROLL_RIGHT:
        button = 7;
        break;
    default:
        return FALSE; // unknown GdkScrollDirection
    }

    memset(&xevent, 0, sizeof(xevent));
    xevent.xbutton.type = ButtonPress;
    xevent.xbutton.window = GDK_WINDOW_XWINDOW(socket_window);
    xevent.xbutton.root = GDK_WINDOW_XWINDOW(gdk_screen_get_root_window(screen));
    xevent.xbutton.subwindow = GDK_WINDOW_XWINDOW(plug_window);
    xevent.xbutton.time = gdk_event->time;
    xevent.xbutton.x = x;
    xevent.xbutton.y = y;
    xevent.xbutton.x_root = gdk_event->x_root;
    xevent.xbutton.y_root = gdk_event->y_root;
    xevent.xbutton.state = gdk_event->state;
    xevent.xbutton.button = button;
    xevent.xbutton.same_screen = True;

    gdk_error_trap_push();

    XSendEvent(dpy, xevent.xbutton.window,
               True, ButtonPressMask, &xevent);

    xevent.xbutton.type = ButtonRelease;
    xevent.xbutton.state |= button_mask;
    XSendEvent(dpy, xevent.xbutton.window,
               True, ButtonReleaseMask, &xevent);

    gdk_display_sync(gdk_screen_get_display(screen));
    gdk_error_trap_pop();

    return TRUE; // event handled
}

static void
wrap_gtk_plug_embedded(GtkPlug* plug) {
    GdkWindow* socket_window = plug->socket_window;
    if (socket_window &&
        g_object_get_data(G_OBJECT(socket_window),
                          "moz-existed-before-set-window")) {
        // Add missing reference for
        // https://bugzilla.gnome.org/show_bug.cgi?id=607061
        g_object_ref(socket_window);
    }

    if (*real_gtk_plug_embedded) {
        (*real_gtk_plug_embedded)(plug);
    }
}

//
// The next four constants are knobs that can be tuned.  They trade
// off potential UI lag from delayed event processing with CPU time.
//
static const gint kNestedLoopDetectorPriority = G_PRIORITY_HIGH_IDLE;
// 90ms so that we can hopefully break livelocks before the user
// notices UI lag (100ms)
static const guint kNestedLoopDetectorIntervalMs = 90;

static const gint kBrowserEventPriority = G_PRIORITY_HIGH_IDLE;
static const guint kBrowserEventIntervalMs = 10;

// static
gboolean
PluginModuleChild::DetectNestedEventLoop(gpointer data)
{
    PluginModuleChild* pmc = static_cast<PluginModuleChild*>(data);

    NS_ABORT_IF_FALSE(0 != pmc->mNestedLoopTimerId,
                      "callback after descheduling");
    NS_ABORT_IF_FALSE(pmc->mTopLoopDepth < g_main_depth(),
                      "not canceled before returning to main event loop!");

    PLUGIN_LOG_DEBUG(("Detected nested glib event loop"));

    // just detected a nested loop; start a timer that will
    // periodically rpc-call back into the browser and process some
    // events
    pmc->mNestedLoopTimerId =
        g_timeout_add_full(kBrowserEventPriority,
                           kBrowserEventIntervalMs,
                           PluginModuleChild::ProcessBrowserEvents,
                           data,
                           NULL);
    // cancel the nested-loop detection timer
    return FALSE;
}

// static
gboolean
PluginModuleChild::ProcessBrowserEvents(gpointer data)
{
    PluginModuleChild* pmc = static_cast<PluginModuleChild*>(data);

    NS_ABORT_IF_FALSE(pmc->mTopLoopDepth < g_main_depth(),
                      "not canceled before returning to main event loop!");

    pmc->CallProcessSomeEvents();

    return TRUE;
}

void
PluginModuleChild::EnteredCxxStack()
{
    NS_ABORT_IF_FALSE(0 == mNestedLoopTimerId,
                      "previous timer not descheduled");

    mNestedLoopTimerId =
        g_timeout_add_full(kNestedLoopDetectorPriority,
                           kNestedLoopDetectorIntervalMs,
                           PluginModuleChild::DetectNestedEventLoop,
                           this,
                           NULL);

#ifdef DEBUG
    mTopLoopDepth = g_main_depth();
#endif
}

void
PluginModuleChild::ExitedCxxStack()
{
    NS_ABORT_IF_FALSE(0 < mNestedLoopTimerId,
                      "nested loop timeout not scheduled");

    g_source_remove(mNestedLoopTimerId);
    mNestedLoopTimerId = 0;
}

#endif

bool
PluginModuleChild::InitGraphics()
{
#if defined(MOZ_WIDGET_GTK2)
    // Work around plugins that don't interact well with GDK
    // client-side windows.
    PR_SetEnv("GDK_NATIVE_WINDOWS=1");

    gtk_init(0, 0);

    // GtkPlug is a static class so will leak anyway but this ref makes sure.
    gpointer gtk_plug_class = g_type_class_ref(GTK_TYPE_PLUG);

    // The dispose method is a good place to hook into the destruction process
    // because the reference count should be 1 the last time dispose is
    // called.  (Toggle references wouldn't detect if the reference count
    // might be higher.)
    GObjectDisposeFn* dispose = &G_OBJECT_CLASS(gtk_plug_class)->dispose;
    NS_ABORT_IF_FALSE(*dispose != wrap_gtk_plug_dispose,
                      "InitGraphics called twice");
    real_gtk_plug_dispose = *dispose;
    *dispose = wrap_gtk_plug_dispose;

    // If we ever stop setting GDK_NATIVE_WINDOWS, we'll also need to
    // gtk_widget_add_events GDK_SCROLL_MASK or GDK client-side windows will
    // not tell us about the scroll events that it intercepts.  With native
    // windows, this is called when GDK intercepts the events; if GDK doesn't
    // intercept the events, then the X server will instead send them directly
    // to an ancestor (embedder) window.
    GtkWidgetScrollEventFn* scroll_event =
        &GTK_WIDGET_CLASS(gtk_plug_class)->scroll_event;
    if (!*scroll_event) {
        *scroll_event = gtk_plug_scroll_event;
    }

    if (gtk_check_version(2,18,7) != NULL) { // older
        GtkPlugEmbeddedFn* embedded = &GTK_PLUG_CLASS(gtk_plug_class)->embedded;
        real_gtk_plug_embedded = *embedded;
        *embedded = wrap_gtk_plug_embedded;
    }

#elif defined(MOZ_WIDGET_QT)
    if (!qApp)
        gQApp = new QApplication(0, NULL);
#else
    // may not be necessary on all platforms
#endif
#ifdef MOZ_X11
    // Do this after initializing GDK, or GDK will install its own handler.
    XRE_InstallX11ErrorHandler();
#endif

    return true;
}

bool
PluginModuleChild::AnswerNP_Shutdown(NPError *rv)
{
    AssertPluginThread();

    // the PluginModuleParent shuts down this process after this RPC
    // call pops off its stack

    *rv = mShutdownFunc ? mShutdownFunc() : NPERR_NO_ERROR;

    // weakly guard against re-entry after NP_Shutdown
    memset(&mFunctions, 0, sizeof(mFunctions));

    return true;
}

void
PluginModuleChild::ActorDestroy(ActorDestroyReason why)
{
    // doesn't matter why we're being destroyed; it's up to us to
    // initiate (clean) shutdown
    XRE_ShutdownChildProcess();
}

void
PluginModuleChild::CleanUp()
{
}

const char*
PluginModuleChild::GetUserAgent()
{
    if (!CallNPN_UserAgent(&mUserAgent))
        return NULL;

    return NullableStringGet(mUserAgent);
}

bool
PluginModuleChild::RegisterActorForNPObject(NPObject* aObject,
                                            PluginScriptableObjectChild* aActor)
{
    AssertPluginThread();
    NS_ASSERTION(mObjectMap.IsInitialized(), "Not initialized!");
    NS_ASSERTION(aObject && aActor, "Null pointer!");

    NPObjectData* d = mObjectMap.GetEntry(aObject);
    if (!d) {
        NS_ERROR("NPObject not in object table");
        return false;
    }

    d->actor = aActor;
    return true;
}

void
PluginModuleChild::UnregisterActorForNPObject(NPObject* aObject)
{
    AssertPluginThread();
    NS_ASSERTION(mObjectMap.IsInitialized(), "Not initialized!");
    NS_ASSERTION(aObject, "Null pointer!");

    mObjectMap.GetEntry(aObject)->actor = NULL;
}

PluginScriptableObjectChild*
PluginModuleChild::GetActorForNPObject(NPObject* aObject)
{
    AssertPluginThread();
    NS_ASSERTION(mObjectMap.IsInitialized(), "Not initialized!");
    NS_ASSERTION(aObject, "Null pointer!");

    NPObjectData* d = mObjectMap.GetEntry(aObject);
    if (!d) {
        NS_ERROR("Plugin using object not created with NPN_CreateObject?");
        return NULL;
    }

    return d->actor;
}

#ifdef DEBUG
bool
PluginModuleChild::NPObjectIsRegistered(NPObject* aObject)
{
    return !!mObjectMap.GetEntry(aObject);
}
#endif

//-----------------------------------------------------------------------------
// FIXME/cjones: just getting this out of the way for the moment ...

namespace mozilla {
namespace plugins {
namespace child {

static NPError NP_CALLBACK
_requestread(NPStream *pstream, NPByteRange *rangeList);

static NPError NP_CALLBACK
_geturlnotify(NPP aNPP, const char* relativeURL, const char* target,
              void* notifyData);

static NPError NP_CALLBACK
_getvalue(NPP aNPP, NPNVariable variable, void *r_value);

static NPError NP_CALLBACK
_setvalue(NPP aNPP, NPPVariable variable, void *r_value);

static NPError NP_CALLBACK
_geturl(NPP aNPP, const char* relativeURL, const char* target);

static NPError NP_CALLBACK
_posturlnotify(NPP aNPP, const char* relativeURL, const char *target,
               uint32_t len, const char *buf, NPBool file, void* notifyData);

static NPError NP_CALLBACK
_posturl(NPP aNPP, const char* relativeURL, const char *target, uint32_t len,
         const char *buf, NPBool file);

static NPError NP_CALLBACK
_newstream(NPP aNPP, NPMIMEType type, const char* window, NPStream** pstream);

static int32_t NP_CALLBACK
_write(NPP aNPP, NPStream *pstream, int32_t len, void *buffer);

static NPError NP_CALLBACK
_destroystream(NPP aNPP, NPStream *pstream, NPError reason);

static void NP_CALLBACK
_status(NPP aNPP, const char *message);

static void NP_CALLBACK
_memfree (void *ptr);

static uint32_t NP_CALLBACK
_memflush(uint32_t size);

static void NP_CALLBACK
_reloadplugins(NPBool reloadPages);

static void NP_CALLBACK
_invalidaterect(NPP aNPP, NPRect *invalidRect);

static void NP_CALLBACK
_invalidateregion(NPP aNPP, NPRegion invalidRegion);

static void NP_CALLBACK
_forceredraw(NPP aNPP);

static const char* NP_CALLBACK
_useragent(NPP aNPP);

static void* NP_CALLBACK
_memalloc (uint32_t size);

// Deprecated entry points for the old Java plugin.
static void* NP_CALLBACK /* OJI type: JRIEnv* */
_getjavaenv(void);

// Deprecated entry points for the old Java plugin.
static void* NP_CALLBACK /* OJI type: jref */
_getjavapeer(NPP aNPP);

static bool NP_CALLBACK
_invoke(NPP aNPP, NPObject* npobj, NPIdentifier method, const NPVariant *args,
        uint32_t argCount, NPVariant *result);

static bool NP_CALLBACK
_invokedefault(NPP aNPP, NPObject* npobj, const NPVariant *args,
               uint32_t argCount, NPVariant *result);

static bool NP_CALLBACK
_evaluate(NPP aNPP, NPObject* npobj, NPString *script, NPVariant *result);

static bool NP_CALLBACK
_getproperty(NPP aNPP, NPObject* npobj, NPIdentifier property,
             NPVariant *result);

static bool NP_CALLBACK
_setproperty(NPP aNPP, NPObject* npobj, NPIdentifier property,
             const NPVariant *value);

static bool NP_CALLBACK
_removeproperty(NPP aNPP, NPObject* npobj, NPIdentifier property);

static bool NP_CALLBACK
_hasproperty(NPP aNPP, NPObject* npobj, NPIdentifier propertyName);

static bool NP_CALLBACK
_hasmethod(NPP aNPP, NPObject* npobj, NPIdentifier methodName);

static bool NP_CALLBACK
_enumerate(NPP aNPP, NPObject *npobj, NPIdentifier **identifier,
           uint32_t *count);

static bool NP_CALLBACK
_construct(NPP aNPP, NPObject* npobj, const NPVariant *args,
           uint32_t argCount, NPVariant *result);

static void NP_CALLBACK
_releasevariantvalue(NPVariant *variant);

static void NP_CALLBACK
_setexception(NPObject* npobj, const NPUTF8 *message);

static bool NP_CALLBACK
_pushpopupsenabledstate(NPP aNPP, NPBool enabled);

static bool NP_CALLBACK
_poppopupsenabledstate(NPP aNPP);

static void NP_CALLBACK
_pluginthreadasynccall(NPP instance, PluginThreadCallback func,
                       void *userData);

static NPError NP_CALLBACK
_getvalueforurl(NPP npp, NPNURLVariable variable, const char *url,
                char **value, uint32_t *len);

static NPError NP_CALLBACK
_setvalueforurl(NPP npp, NPNURLVariable variable, const char *url,
                const char *value, uint32_t len);

static NPError NP_CALLBACK
_getauthenticationinfo(NPP npp, const char *protocol,
                       const char *host, int32_t port,
                       const char *scheme, const char *realm,
                       char **username, uint32_t *ulen,
                       char **password, uint32_t *plen);

} /* namespace child */
} /* namespace plugins */
} /* namespace mozilla */

const NPNetscapeFuncs PluginModuleChild::sBrowserFuncs = {
    sizeof(sBrowserFuncs),
    (NP_VERSION_MAJOR << 8) + NP_VERSION_MINOR,
    mozilla::plugins::child::_geturl,
    mozilla::plugins::child::_posturl,
    mozilla::plugins::child::_requestread,
    mozilla::plugins::child::_newstream,
    mozilla::plugins::child::_write,
    mozilla::plugins::child::_destroystream,
    mozilla::plugins::child::_status,
    mozilla::plugins::child::_useragent,
    mozilla::plugins::child::_memalloc,
    mozilla::plugins::child::_memfree,
    mozilla::plugins::child::_memflush,
    mozilla::plugins::child::_reloadplugins,
    mozilla::plugins::child::_getjavaenv,
    mozilla::plugins::child::_getjavapeer,
    mozilla::plugins::child::_geturlnotify,
    mozilla::plugins::child::_posturlnotify,
    mozilla::plugins::child::_getvalue,
    mozilla::plugins::child::_setvalue,
    mozilla::plugins::child::_invalidaterect,
    mozilla::plugins::child::_invalidateregion,
    mozilla::plugins::child::_forceredraw,
    PluginModuleChild::NPN_GetStringIdentifier,
    PluginModuleChild::NPN_GetStringIdentifiers,
    PluginModuleChild::NPN_GetIntIdentifier,
    PluginModuleChild::NPN_IdentifierIsString,
    PluginModuleChild::NPN_UTF8FromIdentifier,
    PluginModuleChild::NPN_IntFromIdentifier,
    PluginModuleChild::NPN_CreateObject,
    PluginModuleChild::NPN_RetainObject,
    PluginModuleChild::NPN_ReleaseObject,
    mozilla::plugins::child::_invoke,
    mozilla::plugins::child::_invokedefault,
    mozilla::plugins::child::_evaluate,
    mozilla::plugins::child::_getproperty,
    mozilla::plugins::child::_setproperty,
    mozilla::plugins::child::_removeproperty,
    mozilla::plugins::child::_hasproperty,
    mozilla::plugins::child::_hasmethod,
    mozilla::plugins::child::_releasevariantvalue,
    mozilla::plugins::child::_setexception,
    mozilla::plugins::child::_pushpopupsenabledstate,
    mozilla::plugins::child::_poppopupsenabledstate,
    mozilla::plugins::child::_enumerate,
    mozilla::plugins::child::_pluginthreadasynccall,
    mozilla::plugins::child::_construct,
    mozilla::plugins::child::_getvalueforurl,
    mozilla::plugins::child::_setvalueforurl,
    mozilla::plugins::child::_getauthenticationinfo
};

PluginInstanceChild*
InstCast(NPP aNPP)
{
    NS_ABORT_IF_FALSE(!!(aNPP->ndata), "nil instance");
    return static_cast<PluginInstanceChild*>(aNPP->ndata);
}

namespace mozilla {
namespace plugins {
namespace child {

NPError NP_CALLBACK
_requestread(NPStream* aStream,
             NPByteRange* aRangeList)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(NPERR_INVALID_PARAM);

    BrowserStreamChild* bs =
        static_cast<BrowserStreamChild*>(static_cast<AStream*>(aStream->ndata));
    bs->EnsureCorrectStream(aStream);
    return bs->NPN_RequestRead(aRangeList);
}

NPError NP_CALLBACK
_geturlnotify(NPP aNPP,
              const char* aRelativeURL,
              const char* aTarget,
              void* aNotifyData)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(NPERR_INVALID_PARAM);

    nsCString url = NullableString(aRelativeURL);
    StreamNotifyChild* sn = new StreamNotifyChild(url);

    NPError err;
    InstCast(aNPP)->CallPStreamNotifyConstructor(
        sn, url, NullableString(aTarget), false, nsCString(), false, &err);

    if (NPERR_NO_ERROR == err) {
        // If NPN_PostURLNotify fails, the parent will immediately send us
        // a PStreamNotifyDestructor, which should not call NPP_URLNotify.
        sn->SetValid(aNotifyData);
    }

    return err;
}

NPError NP_CALLBACK
_getvalue(NPP aNPP,
          NPNVariable aVariable,
          void* aValue)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(NPERR_INVALID_PARAM);

    switch (aVariable) {
        // Copied from nsNPAPIPlugin.cpp
        case NPNVToolkit:
#ifdef MOZ_WIDGET_GTK2
            *static_cast<NPNToolkitType*>(aValue) = NPNVGtk2;
            return NPERR_NO_ERROR;
#endif
            return NPERR_GENERIC_ERROR;

        case NPNVjavascriptEnabledBool: // Intentional fall-through
        case NPNVasdEnabledBool: // Intentional fall-through
        case NPNVisOfflineBool: // Intentional fall-through
        case NPNVSupportsXEmbedBool: // Intentional fall-through
        case NPNVSupportsWindowless: // Intentional fall-through
        case NPNVprivateModeBool: {
            NPError result;
            bool value;
            PluginModuleChild::current()->
                CallNPN_GetValue_WithBoolReturn(aVariable, &result, &value);
            *(NPBool*)aValue = value ? true : false;
            return result;
        }

        default: {
            if (aNPP) {
                return InstCast(aNPP)->NPN_GetValue(aVariable, aValue);
            }

            NS_WARNING("Null NPP!");
            return NPERR_INVALID_INSTANCE_ERROR;
        }
    }

    NS_NOTREACHED("Shouldn't get here!");
    return NPERR_GENERIC_ERROR;
}

NPError NP_CALLBACK
_setvalue(NPP aNPP,
          NPPVariable aVariable,
          void* aValue)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(NPERR_INVALID_PARAM);
    return InstCast(aNPP)->NPN_SetValue(aVariable, aValue);
}

NPError NP_CALLBACK
_geturl(NPP aNPP,
        const char* aRelativeURL,
        const char* aTarget)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(NPERR_INVALID_PARAM);

    NPError err;
    InstCast(aNPP)->CallNPN_GetURL(NullableString(aRelativeURL),
                                   NullableString(aTarget), &err);
    return err;
}

NPError NP_CALLBACK
_posturlnotify(NPP aNPP,
               const char* aRelativeURL,
               const char* aTarget,
               uint32_t aLength,
               const char* aBuffer,
               NPBool aIsFile,
               void* aNotifyData)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(NPERR_INVALID_PARAM);

    if (!aBuffer)
        return NPERR_INVALID_PARAM;

    nsCString url = NullableString(aRelativeURL);
    StreamNotifyChild* sn = new StreamNotifyChild(url);

    NPError err;
    InstCast(aNPP)->CallPStreamNotifyConstructor(
        sn, url, NullableString(aTarget), true,
        nsCString(aBuffer, aLength), aIsFile, &err);

    if (NPERR_NO_ERROR == err) {
        // If NPN_PostURLNotify fails, the parent will immediately send us
        // a PStreamNotifyDestructor, which should not call NPP_URLNotify.
        sn->SetValid(aNotifyData);
    }

    return err;
}

NPError NP_CALLBACK
_posturl(NPP aNPP,
         const char* aRelativeURL,
         const char* aTarget,
         uint32_t aLength,
         const char* aBuffer,
         NPBool aIsFile)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(NPERR_INVALID_PARAM);

    NPError err;
    // FIXME what should happen when |aBuffer| is null?
    InstCast(aNPP)->CallNPN_PostURL(NullableString(aRelativeURL),
                                    NullableString(aTarget),
                                    nsDependentCString(aBuffer, aLength),
                                    aIsFile, &err);
    return err;
}

NPError NP_CALLBACK
_newstream(NPP aNPP,
           NPMIMEType aMIMEType,
           const char* aWindow,
           NPStream** aStream)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(NPERR_INVALID_PARAM);
    return InstCast(aNPP)->NPN_NewStream(aMIMEType, aWindow, aStream);
}

int32_t NP_CALLBACK
_write(NPP aNPP,
       NPStream* aStream,
       int32_t aLength,
       void* aBuffer)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(0);

    PluginStreamChild* ps =
        static_cast<PluginStreamChild*>(static_cast<AStream*>(aStream->ndata));
    ps->EnsureCorrectInstance(InstCast(aNPP));
    ps->EnsureCorrectStream(aStream);
    return ps->NPN_Write(aLength, aBuffer);
}

NPError NP_CALLBACK
_destroystream(NPP aNPP,
               NPStream* aStream,
               NPError aReason)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(NPERR_INVALID_PARAM);

    PluginInstanceChild* p = InstCast(aNPP);
    AStream* s = static_cast<AStream*>(aStream->ndata);
    if (s->IsBrowserStream()) {
        BrowserStreamChild* bs = static_cast<BrowserStreamChild*>(s);
        bs->EnsureCorrectInstance(p);
        bs->NPN_DestroyStream(aReason);
    }
    else {
        PluginStreamChild* ps = static_cast<PluginStreamChild*>(s);
        ps->EnsureCorrectInstance(p);
        PPluginStreamChild::Call__delete__(ps, aReason, false);
    }
    return NPERR_NO_ERROR;
}

void NP_CALLBACK
_status(NPP aNPP,
        const char* aMessage)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD_VOID();
    NS_WARNING("Not yet implemented!");
}

void NP_CALLBACK
_memfree(void* aPtr)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    // Only assert plugin thread here for consistency with in-process plugins.
    AssertPluginThread();
    NS_Free(aPtr);
}

uint32_t NP_CALLBACK
_memflush(uint32_t aSize)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    // Only assert plugin thread here for consistency with in-process plugins.
    AssertPluginThread();
    return 0;
}

void NP_CALLBACK
_reloadplugins(NPBool aReloadPages)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD_VOID();
    NS_WARNING("Not yet implemented!");
}

void NP_CALLBACK
_invalidaterect(NPP aNPP,
                NPRect* aInvalidRect)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD_VOID();
    // NULL check for nspluginwrapper (bug 548434)
    if (aNPP) {
        InstCast(aNPP)->InvalidateRect(aInvalidRect);
    }
}

void NP_CALLBACK
_invalidateregion(NPP aNPP,
                  NPRegion aInvalidRegion)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD_VOID();
    NS_WARNING("Not yet implemented!");
}

void NP_CALLBACK
_forceredraw(NPP aNPP)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD_VOID();
    NS_WARNING("Not yet implemented!");
}

const char* NP_CALLBACK
_useragent(NPP aNPP)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(nsnull);
    return PluginModuleChild::current()->GetUserAgent();
}

void* NP_CALLBACK
_memalloc(uint32_t aSize)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    // Only assert plugin thread here for consistency with in-process plugins.
    AssertPluginThread();
    return NS_Alloc(aSize);
}

// Deprecated entry points for the old Java plugin.
void* NP_CALLBACK /* OJI type: JRIEnv* */
_getjavaenv(void)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    return 0;
}

void* NP_CALLBACK /* OJI type: jref */
_getjavapeer(NPP aNPP)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    return 0;
}

bool NP_CALLBACK
_invoke(NPP aNPP,
        NPObject* aNPObj,
        NPIdentifier aMethod,
        const NPVariant* aArgs,
        uint32_t aArgCount,
        NPVariant* aResult)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!aNPP || !aNPObj || !aNPObj->_class || !aNPObj->_class->invoke)
        return false;

    return aNPObj->_class->invoke(aNPObj, aMethod, aArgs, aArgCount, aResult);
}

bool NP_CALLBACK
_invokedefault(NPP aNPP,
               NPObject* aNPObj,
               const NPVariant* aArgs,
               uint32_t aArgCount,
               NPVariant* aResult)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!aNPP || !aNPObj || !aNPObj->_class || !aNPObj->_class->invokeDefault)
        return false;

    return aNPObj->_class->invokeDefault(aNPObj, aArgs, aArgCount, aResult);
}

bool NP_CALLBACK
_evaluate(NPP aNPP,
          NPObject* aObject,
          NPString* aScript,
          NPVariant* aResult)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!(aNPP && aObject && aScript && aResult)) {
        NS_ERROR("Bad arguments!");
        return false;
    }

    PluginScriptableObjectChild* actor =
      InstCast(aNPP)->GetActorForNPObject(aObject);
    if (!actor) {
        NS_ERROR("Failed to create actor?!");
        return false;
    }

    return actor->Evaluate(aScript, aResult);
}

bool NP_CALLBACK
_getproperty(NPP aNPP,
             NPObject* aNPObj,
             NPIdentifier aPropertyName,
             NPVariant* aResult)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!aNPP || !aNPObj || !aNPObj->_class || !aNPObj->_class->getProperty)
        return false;

    return aNPObj->_class->getProperty(aNPObj, aPropertyName, aResult);
}

bool NP_CALLBACK
_setproperty(NPP aNPP,
             NPObject* aNPObj,
             NPIdentifier aPropertyName,
             const NPVariant* aValue)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!aNPP || !aNPObj || !aNPObj->_class || !aNPObj->_class->setProperty)
        return false;

    return aNPObj->_class->setProperty(aNPObj, aPropertyName, aValue);
}

bool NP_CALLBACK
_removeproperty(NPP aNPP,
                NPObject* aNPObj,
                NPIdentifier aPropertyName)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!aNPP || !aNPObj || !aNPObj->_class || !aNPObj->_class->removeProperty)
        return false;

    return aNPObj->_class->removeProperty(aNPObj, aPropertyName);
}

bool NP_CALLBACK
_hasproperty(NPP aNPP,
             NPObject* aNPObj,
             NPIdentifier aPropertyName)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!aNPP || !aNPObj || !aNPObj->_class || !aNPObj->_class->hasProperty)
        return false;

    return aNPObj->_class->hasProperty(aNPObj, aPropertyName);
}

bool NP_CALLBACK
_hasmethod(NPP aNPP,
           NPObject* aNPObj,
           NPIdentifier aMethodName)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!aNPP || !aNPObj || !aNPObj->_class || !aNPObj->_class->hasMethod)
        return false;

    return aNPObj->_class->hasMethod(aNPObj, aMethodName);
}

bool NP_CALLBACK
_enumerate(NPP aNPP,
           NPObject* aNPObj,
           NPIdentifier** aIdentifiers,
           uint32_t* aCount)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!aNPP || !aNPObj || !aNPObj->_class)
        return false;

    if (!NP_CLASS_STRUCT_VERSION_HAS_ENUM(aNPObj->_class) ||
        !aNPObj->_class->enumerate) {
        *aIdentifiers = 0;
        *aCount = 0;
        return true;
    }

    return aNPObj->_class->enumerate(aNPObj, aIdentifiers, aCount);
}

bool NP_CALLBACK
_construct(NPP aNPP,
           NPObject* aNPObj,
           const NPVariant* aArgs,
           uint32_t aArgCount,
           NPVariant* aResult)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(false);

    if (!aNPP || !aNPObj || !aNPObj->_class ||
        !NP_CLASS_STRUCT_VERSION_HAS_CTOR(aNPObj->_class) ||
        !aNPObj->_class->construct) {
        return false;
    }

    return aNPObj->_class->construct(aNPObj, aArgs, aArgCount, aResult);
}

void NP_CALLBACK
_releasevariantvalue(NPVariant* aVariant)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    // Only assert plugin thread here for consistency with in-process plugins.
    AssertPluginThread();

    if (NPVARIANT_IS_STRING(*aVariant)) {
        NPString str = NPVARIANT_TO_STRING(*aVariant);
        free(const_cast<NPUTF8*>(str.UTF8Characters));
    }
    else if (NPVARIANT_IS_OBJECT(*aVariant)) {
        NPObject* object = NPVARIANT_TO_OBJECT(*aVariant);
        if (object) {
            PluginModuleChild::NPN_ReleaseObject(object);
        }
    }
    VOID_TO_NPVARIANT(*aVariant);
}

void NP_CALLBACK
_setexception(NPObject* aNPObj,
              const NPUTF8* aMessage)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD_VOID();
    NS_WARNING("Not yet implemented!");
}

bool NP_CALLBACK
_pushpopupsenabledstate(NPP aNPP,
                        NPBool aEnabled)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    // XXXbent This is incorrect, followup to make this return void!
    ENSURE_PLUGIN_THREAD(false);

    bool retval;
    if (InstCast(aNPP)->CallNPN_PushPopupsEnabledState(aEnabled ? true : false,
                                                       &retval)) {
        return retval;
    }
    return false;
}

bool NP_CALLBACK
_poppopupsenabledstate(NPP aNPP)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    // XXXbent This is incorrect, followup to make this return void!
    ENSURE_PLUGIN_THREAD(false);

    bool retval;
    if (InstCast(aNPP)->CallNPN_PopPopupsEnabledState(&retval)) {
        return retval;
    }
    return false;
}

void NP_CALLBACK
_pluginthreadasynccall(NPP aNPP,
                       PluginThreadCallback aFunc,
                       void* aUserData)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    if (!aFunc)
        return;

    PluginThreadChild::current()->message_loop()
        ->PostTask(FROM_HERE, new ChildAsyncCall(InstCast(aNPP), aFunc,
                                                 aUserData));
}

NPError NP_CALLBACK
_getvalueforurl(NPP npp, NPNURLVariable variable, const char *url,
                char **value, uint32_t *len)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    AssertPluginThread();

    if (!url)
        return NPERR_INVALID_URL;

    if (!npp || !value || !len)
        return NPERR_INVALID_PARAM;

    switch (variable) {
    case NPNURLVCookie:
    case NPNURLVProxy:
        nsCString v;
        NPError result;
        InstCast(npp)->
            CallNPN_GetValueForURL(variable, nsCString(url), &v, &result);
        if (NPERR_NO_ERROR == result) {
            *value = ToNewCString(v);
            *len = v.Length();
        }
        return result;
    }

    return NPERR_INVALID_PARAM;
}

NPError NP_CALLBACK
_setvalueforurl(NPP npp, NPNURLVariable variable, const char *url,
                const char *value, uint32_t len)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    AssertPluginThread();

    if (!value)
        return NPERR_INVALID_PARAM;

    if (!url)
        return NPERR_INVALID_URL;

    switch (variable) {
    case NPNURLVCookie:
    case NPNURLVProxy:
        NPError result;
        InstCast(npp)->CallNPN_SetValueForURL(variable, nsCString(url),
                                              nsDependentCString(value, len),
                                              &result);
        return result;
    }

    return NPERR_INVALID_PARAM;
}

NPError NP_CALLBACK
_getauthenticationinfo(NPP npp, const char *protocol,
                       const char *host, int32_t port,
                       const char *scheme, const char *realm,
                       char **username, uint32_t *ulen,
                       char **password, uint32_t *plen)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    AssertPluginThread();

    if (!protocol || !host || !scheme || !realm || !username || !ulen ||
        !password || !plen)
        return NPERR_INVALID_PARAM;

    nsCString u;
    nsCString p;
    NPError result;
    InstCast(npp)->
        CallNPN_GetAuthenticationInfo(nsDependentCString(protocol),
                                      nsDependentCString(host),
                                      port,
                                      nsDependentCString(scheme),
                                      nsDependentCString(realm),
                                      &u, &p, &result);
    if (NPERR_NO_ERROR == result) {
        *username = ToNewCString(u);
        *ulen = u.Length();
        *password = ToNewCString(p);
        *plen = p.Length();
    }
    return result;
}

} /* namespace child */
} /* namespace plugins */
} /* namespace mozilla */

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

bool
PluginModuleChild::AnswerNP_Initialize(NativeThreadId* tid, NPError* _retval)
{
    PLUGIN_LOG_DEBUG_METHOD;
    AssertPluginThread();

#ifdef MOZ_CRASHREPORTER
    *tid = CrashReporter::CurrentThreadId();
#else
    *tid = 0;
#endif

#if defined(OS_LINUX)
    *_retval = mInitializeFunc(&sBrowserFuncs, &mFunctions);
    return true;

#elif defined(OS_WIN)
    nsresult rv = mGetEntryPointsFunc(&mFunctions);
    if (NS_FAILED(rv)) {
        return false;
    }

    NS_ASSERTION(HIBYTE(mFunctions.version) >= NP_VERSION_MAJOR,
                 "callback version is less than NP version");

    *_retval = mInitializeFunc(&sBrowserFuncs);
    return true;
#elif defined(OS_MACOSX)
#  warning IMPLEMENT ME
    return false;

#else
#  error Please implement me for your platform
#endif
}

PPluginIdentifierChild*
PluginModuleChild::AllocPPluginIdentifier(const nsCString& aString,
                                          const int32_t& aInt)
{
    // There's a possibility that we already have an actor that wraps the same
    // string or int because we do all this identifier construction
    // asynchronously. Check to see if we've already wrapped here, and then set
    // canonical actor of the new one to the actor already in our hash.
    PluginIdentifierChild* newActor;
    PluginIdentifierChild* existingActor;

    if (aString.IsVoid()) {
        newActor = new PluginIdentifierChildInt(aInt);
        if (mIntIdentifiers.Get(aInt, &existingActor)) {
            newActor->SetCanonicalIdentifier(existingActor);
        }
    }
    else {
        newActor = new PluginIdentifierChildString(aString);
        if (mStringIdentifiers.Get(aString, &existingActor)) {
            newActor->SetCanonicalIdentifier(existingActor);
        }
    }
    return newActor;
}

bool
PluginModuleChild::DeallocPPluginIdentifier(PPluginIdentifierChild* aActor)
{
    delete aActor;
    return true;
}

PPluginInstanceChild*
PluginModuleChild::AllocPPluginInstance(const nsCString& aMimeType,
                                        const uint16_t& aMode,
                                        const nsTArray<nsCString>& aNames,
                                        const nsTArray<nsCString>& aValues,
                                        NPError* rv)
{
    PLUGIN_LOG_DEBUG_METHOD;
    AssertPluginThread();

    nsAutoPtr<PluginInstanceChild> childInstance(
        new PluginInstanceChild(&mFunctions, aMimeType));
    if (!childInstance->Initialize()) {
        *rv = NPERR_GENERIC_ERROR;
        return 0;
    }
    return childInstance.forget();
}

bool
PluginModuleChild::AnswerPPluginInstanceConstructor(PPluginInstanceChild* aActor,
                                                    const nsCString& aMimeType,
                                                    const uint16_t& aMode,
                                                    const nsTArray<nsCString>& aNames,
                                                    const nsTArray<nsCString>& aValues,
                                                    NPError* rv)
{
    PLUGIN_LOG_DEBUG_METHOD;
    AssertPluginThread();

    PluginInstanceChild* childInstance =
        reinterpret_cast<PluginInstanceChild*>(aActor);
    NS_ASSERTION(childInstance, "Null actor!");

    // unpack the arguments into a C format
    int argc = aNames.Length();
    NS_ASSERTION(argc == (int) aValues.Length(),
                 "argn.length != argv.length");

    nsAutoArrayPtr<char*> argn(new char*[1 + argc]);
    nsAutoArrayPtr<char*> argv(new char*[1 + argc]);
    argn[argc] = 0;
    argv[argc] = 0;

    for (int i = 0; i < argc; ++i) {
        argn[i] = const_cast<char*>(NullableStringGet(aNames[i]));
        argv[i] = const_cast<char*>(NullableStringGet(aValues[i]));
    }

    NPP npp = childInstance->GetNPP();

    // FIXME/cjones: use SAFE_CALL stuff
    *rv = mFunctions.newp((char*)NullableStringGet(aMimeType),
                          npp,
                          aMode,
                          argc,
                          argn,
                          argv,
                          0);
    if (NPERR_NO_ERROR != *rv) {
        return false;
    }

    return true;
}

bool
PluginModuleChild::DeallocPPluginInstance(PPluginInstanceChild* aActor)
{
    PLUGIN_LOG_DEBUG_METHOD;
    AssertPluginThread();

    delete aActor;

    return true;
}

NPObject* NP_CALLBACK
PluginModuleChild::NPN_CreateObject(NPP aNPP, NPClass* aClass)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    ENSURE_PLUGIN_THREAD(nsnull);

    PluginInstanceChild* i = InstCast(aNPP);
    if (i->mDeletingHash) {
        NS_ERROR("Plugin used NPP after NPP_Destroy");
        return NULL;
    }

    NPObject* newObject;
    if (aClass && aClass->allocate) {
        newObject = aClass->allocate(aNPP, aClass);
    }
    else {
        newObject = reinterpret_cast<NPObject*>(child::_memalloc(sizeof(NPObject)));
    }

    if (newObject) {
        newObject->_class = aClass;
        newObject->referenceCount = 1;
        NS_LOG_ADDREF(newObject, 1, "NPObject", sizeof(NPObject));
    }

    NPObjectData* d = static_cast<PluginModuleChild*>(i->Manager())
        ->mObjectMap.PutEntry(newObject);
    NS_ASSERTION(!d->instance, "New NPObject already mapped?");
    d->instance = i;

    return newObject;
}

NPObject* NP_CALLBACK
PluginModuleChild::NPN_RetainObject(NPObject* aNPObj)
{
    AssertPluginThread();

    int32_t refCnt = PR_AtomicIncrement((PRInt32*)&aNPObj->referenceCount);
    NS_LOG_ADDREF(aNPObj, refCnt, "NPObject", sizeof(NPObject));

    return aNPObj;
}

void NP_CALLBACK
PluginModuleChild::NPN_ReleaseObject(NPObject* aNPObj)
{
    AssertPluginThread();

    NPObjectData* d = current()->mObjectMap.GetEntry(aNPObj);
    if (!d) {
        NS_ERROR("Releasing object not in mObjectMap?");
        return;
    }

    DeletingObjectEntry* doe = NULL;
    if (d->instance->mDeletingHash) {
        doe = d->instance->mDeletingHash->GetEntry(aNPObj);
        if (!doe) {
            NS_ERROR("An object for a destroyed instance isn't in the instance deletion hash");
            return;
        }
        if (doe->mDeleted)
            return;
    }

    int32_t refCnt = PR_AtomicDecrement((PRInt32*)&aNPObj->referenceCount);
    NS_LOG_RELEASE(aNPObj, refCnt, "NPObject");

    if (refCnt == 0) {
        DeallocNPObject(aNPObj);
        if (doe)
            doe->mDeleted = true;
    }
    return;
}

void
PluginModuleChild::DeallocNPObject(NPObject* aNPObj)
{
    if (aNPObj->_class && aNPObj->_class->deallocate) {
        aNPObj->_class->deallocate(aNPObj);
    } else {
        child::_memfree(aNPObj);
    }

    NPObjectData* d = current()->mObjectMap.GetEntry(aNPObj);
    if (d->actor)
        d->actor->NPObjectDestroyed();

    current()->mObjectMap.RemoveEntry(aNPObj);
}

void
PluginModuleChild::FindNPObjectsForInstance(PluginInstanceChild* instance)
{
    NS_ASSERTION(instance->mDeletingHash, "filling null mDeletingHash?");
    mObjectMap.EnumerateEntries(CollectForInstance, instance);
}

PLDHashOperator
PluginModuleChild::CollectForInstance(NPObjectData* d, void* userArg)
{
    PluginInstanceChild* instance = static_cast<PluginInstanceChild*>(userArg);
    if (d->instance == instance) {
        NPObject* o = d->GetKey();
        instance->mDeletingHash->PutEntry(o);
    }
    return PL_DHASH_NEXT;
}

NPIdentifier NP_CALLBACK
PluginModuleChild::NPN_GetStringIdentifier(const NPUTF8* aName)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    AssertPluginThread();

    if (!aName)
        return 0;

    PluginModuleChild* self = PluginModuleChild::current();
    nsDependentCString name(aName);

    PluginIdentifierChild* ident;
    if (!self->mStringIdentifiers.Get(name, &ident)) {
        nsCString nameCopy(name);

        ident = new PluginIdentifierChildString(nameCopy);
        self->SendPPluginIdentifierConstructor(ident, nameCopy, -1);
        self->mStringIdentifiers.Put(nameCopy, ident);
    }

    return ident;
}

void NP_CALLBACK
PluginModuleChild::NPN_GetStringIdentifiers(const NPUTF8** aNames,
                                            int32_t aNameCount,
                                            NPIdentifier* aIdentifiers)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    AssertPluginThread();

    if (!(aNames && aNameCount > 0 && aIdentifiers)) {
        NS_RUNTIMEABORT("Bad input! Headed for a crash!");
    }

    PluginModuleChild* self = PluginModuleChild::current();

    for (int32_t index = 0; index < aNameCount; ++index) {
        if (!aNames[index]) {
            aIdentifiers[index] = 0;
            continue;
        }
        nsDependentCString name(aNames[index]);
        PluginIdentifierChild* ident;
        if (!self->mStringIdentifiers.Get(name, &ident)) {
            nsCString nameCopy(name);

            ident = new PluginIdentifierChildString(nameCopy);
            self->SendPPluginIdentifierConstructor(ident, nameCopy, -1);
            self->mStringIdentifiers.Put(nameCopy, ident);
        }
        aIdentifiers[index] = ident;
    }
}

bool NP_CALLBACK
PluginModuleChild::NPN_IdentifierIsString(NPIdentifier aIdentifier)
{
    PLUGIN_LOG_DEBUG_FUNCTION;

    PluginIdentifierChild* ident =
        static_cast<PluginIdentifierChild*>(aIdentifier);
    return ident->IsString();
}

NPIdentifier NP_CALLBACK
PluginModuleChild::NPN_GetIntIdentifier(int32_t aIntId)
{
    PLUGIN_LOG_DEBUG_FUNCTION;
    AssertPluginThread();

    PluginModuleChild* self = PluginModuleChild::current();

    PluginIdentifierChild* ident;
    if (!self->mIntIdentifiers.Get(aIntId, &ident)) {
        nsCString voidString;
        voidString.SetIsVoid(PR_TRUE);

        ident = new PluginIdentifierChildInt(aIntId);
        self->SendPPluginIdentifierConstructor(ident, voidString, aIntId);
        self->mIntIdentifiers.Put(aIntId, ident);
    }
    return ident;
}

NPUTF8* NP_CALLBACK
PluginModuleChild::NPN_UTF8FromIdentifier(NPIdentifier aIdentifier)
{
    PLUGIN_LOG_DEBUG_FUNCTION;

    if (static_cast<PluginIdentifierChild*>(aIdentifier)->IsString()) {
      return static_cast<PluginIdentifierChildString*>(aIdentifier)->ToString();
    }
    return nsnull;
}

int32_t NP_CALLBACK
PluginModuleChild::NPN_IntFromIdentifier(NPIdentifier aIdentifier)
{
    PLUGIN_LOG_DEBUG_FUNCTION;

    if (static_cast<PluginIdentifierChild*>(aIdentifier)->IsString()) {
      return static_cast<PluginIdentifierChildInt*>(aIdentifier)->ToInt();
    }
    return PR_INT32_MIN;
}
