/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:expandtab:shiftwidth=2:tabstop=8:

 */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsGTKRemoteService.h"

#include <gtk/gtk.h>

#include <gdk/gdk.h>

#include <gdk/gdkx.h>

#include "nsIBaseWindow.h"

#include "nsIDocShell.h"

#include "nsPIDOMWindow.h"

#include "mozilla/ModuleUtils.h"

#include "nsIServiceManager.h"

#include "nsIWeakReference.h"

#include "nsIWidget.h"

#include "nsIAppShellService.h"

#include "nsAppShellCID.h"

#include "nsCOMPtr.h"

#include "nsGTKToolkit.h"

NS_IMPL_ISUPPORTS(nsGTKRemoteService,

                  nsIRemoteService)

NS_IMETHODIMP

nsGTKRemoteService::Startup(const char* aAppName, const char* aProfileName)

{

  NS_ASSERTION(aAppName, "Don't pass a null appname!");

  if (mServerWindow) return NS_ERROR_ALREADY_INITIALIZED;

  XRemoteBaseStartup(aAppName, aProfileName);

  mServerWindow = gtk_invisible_new();

  gtk_widget_realize(mServerWindow);

  HandleCommandsFor(mServerWindow, nullptr);

  for (auto iter = mWindows.Iter(); !iter.Done(); iter.Next()) {

    HandleCommandsFor(iter.Key(), iter.UserData());

  }

  return NS_OK;

}

static nsIWidget* GetMainWidget(nsPIDOMWindowInner* aWindow)

{

  // get the native window for this instance

  nsCOMPtr<nsIBaseWindow> baseWindow

    (do_QueryInterface(aWindow->GetDocShell()));

  NS_ENSURE_TRUE(baseWindow, nullptr);

  nsCOMPtr<nsIWidget> mainWidget;

  baseWindow->GetMainWidget(getter_AddRefs(mainWidget));

  return mainWidget;

}

NS_IMETHODIMP

nsGTKRemoteService::RegisterWindow(mozIDOMWindow* aWindow)

{

  nsIWidget* mainWidget = GetMainWidget(nsPIDOMWindowInner::From(aWindow));

  NS_ENSURE_TRUE(mainWidget, NS_ERROR_FAILURE);

  GtkWidget* widget =

    (GtkWidget*) mainWidget->GetNativeData(NS_NATIVE_SHELLWIDGET);

  NS_ENSURE_TRUE(widget, NS_ERROR_FAILURE);

  nsCOMPtr<nsIWeakReference> weak = do_GetWeakReference(aWindow);

  NS_ENSURE_TRUE(weak, NS_ERROR_FAILURE);

  mWindows.Put(widget, weak);

  // If Startup() has already been called, immediately register this window.

  if (mServerWindow) {

    HandleCommandsFor(widget, weak);

  }

  return NS_OK;

}

NS_IMETHODIMP

nsGTKRemoteService::Shutdown()

{

  if (!mServerWindow)

    return NS_ERROR_NOT_INITIALIZED;

  gtk_widget_destroy(mServerWindow);

  mServerWindow = nullptr;

  return NS_OK;

}

void

nsGTKRemoteService::HandleCommandsFor(GtkWidget* widget,

                                      nsIWeakReference* aWindow)

{

  g_signal_connect(G_OBJECT(widget), "property_notify_event",

                   G_CALLBACK(HandlePropertyChange), aWindow);

  gtk_widget_add_events(widget, GDK_PROPERTY_CHANGE_MASK);

  Window window = gdk_x11_window_get_xid(gtk_widget_get_window(widget));

  nsXRemoteService::HandleCommandsFor(window);

}

gboolean

nsGTKRemoteService::HandlePropertyChange(GtkWidget *aWidget,

                                         GdkEventProperty *pevent,

                                         nsIWeakReference *aThis)

{

  if (pevent->state == GDK_PROPERTY_NEW_VALUE) {

    Atom changedAtom = gdk_x11_atom_to_xatom(pevent->atom);

    XID window = gdk_x11_window_get_xid(gtk_widget_get_window(aWidget));

    return HandleNewProperty(window,

                             GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),

                             pevent->time, changedAtom, aThis);

  }

  return FALSE;

}