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

/* 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 "mozilla/Types.h"

#include <gtk/gtk.h>

#include "nsApplicationChooser.h"

#include "WidgetUtils.h"

#include "nsIMIMEInfo.h"

#include "nsIWidget.h"

#include "nsCExternalHandlerService.h"

#include "nsComponentManagerUtils.h"

#include "nsGtkUtils.h"

#include "nsPIDOMWindow.h"

using namespace mozilla;

NS_IMPL_ISUPPORTS(nsApplicationChooser, nsIApplicationChooser)

nsApplicationChooser::nsApplicationChooser()

{

}

nsApplicationChooser::~nsApplicationChooser()

{

}

NS_IMETHODIMP

nsApplicationChooser::Init(mozIDOMWindowProxy* aParent,

                           const nsACString& aTitle)

{

  NS_ENSURE_TRUE(aParent, NS_ERROR_FAILURE);

  auto* parent = nsPIDOMWindowOuter::From(aParent);

  mParentWidget = widget::WidgetUtils::DOMWindowToWidget(parent);

  mWindowTitle.Assign(aTitle);

  return NS_OK;

}

NS_IMETHODIMP

nsApplicationChooser::Open(const nsACString& aContentType, nsIApplicationChooserFinishedCallback *aCallback)

{

  MOZ_ASSERT(aCallback);

  if (mCallback) {

    NS_WARNING("Chooser is already in progress.");

    return NS_ERROR_ALREADY_INITIALIZED;

  }

  mCallback = aCallback;

  NS_ENSURE_TRUE(mParentWidget, NS_ERROR_FAILURE);

  GtkWindow *parent_widget =

    GTK_WINDOW(mParentWidget->GetNativeData(NS_NATIVE_SHELLWIDGET));

  GtkWidget* chooser =

    gtk_app_chooser_dialog_new_for_content_type(parent_widget,

        (GtkDialogFlags) (GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT),

        PromiseFlatCString(aContentType).get());

  gtk_app_chooser_dialog_set_heading(GTK_APP_CHOOSER_DIALOG(chooser), mWindowTitle.BeginReading());

  NS_ADDREF_THIS();

  g_signal_connect(chooser, "response", G_CALLBACK(OnResponse), this);

  g_signal_connect(chooser, "destroy", G_CALLBACK(OnDestroy), this);

  gtk_widget_show(chooser);

  return NS_OK;

}

/* static */ void

nsApplicationChooser::OnResponse(GtkWidget* chooser, gint response_id, gpointer user_data)

{

  static_cast<nsApplicationChooser*>(user_data)->Done(chooser, response_id);

}

/* static */ void

nsApplicationChooser::OnDestroy(GtkWidget *chooser, gpointer user_data)

{

  static_cast<nsApplicationChooser*>(user_data)->Done(chooser, GTK_RESPONSE_CANCEL);

}

void nsApplicationChooser::Done(GtkWidget* chooser, gint response)

{

  nsCOMPtr<nsILocalHandlerApp> localHandler;

  nsresult rv;

  switch (response) {

    case GTK_RESPONSE_OK:

    case GTK_RESPONSE_ACCEPT:

        {

          localHandler = do_CreateInstance(NS_LOCALHANDLERAPP_CONTRACTID, &rv);

          if (NS_FAILED(rv)) {

            NS_WARNING("Out of memory.");

            break;

          }

          GAppInfo *app_info = gtk_app_chooser_get_app_info(GTK_APP_CHOOSER(chooser));

          nsCOMPtr<nsIFile> localExecutable;

          gchar *fileWithFullPath = g_find_program_in_path(g_app_info_get_executable(app_info));

          rv = NS_NewNativeLocalFile(nsDependentCString(fileWithFullPath), false, getter_AddRefs(localExecutable));

          g_free(fileWithFullPath);

          if (NS_FAILED(rv)) {

            NS_WARNING("Cannot create local filename.");

            localHandler = nullptr;

          } else {

            localHandler->SetExecutable(localExecutable);

            localHandler->SetName(NS_ConvertUTF8toUTF16(g_app_info_get_display_name(app_info)));

          }

          g_object_unref(app_info);

        }

        break;

    case GTK_RESPONSE_CANCEL:

    case GTK_RESPONSE_CLOSE:

    case GTK_RESPONSE_DELETE_EVENT:

        break;

    default:

        NS_WARNING("Unexpected response");

        break;

  }

  // A "response" signal won't be sent again but "destroy" will be.

  g_signal_handlers_disconnect_by_func(chooser, FuncToGpointer(OnDestroy), this);

  gtk_widget_destroy(chooser);

  if (mCallback) {

    mCallback->Done(localHandler);

    mCallback = nullptr;

  }

  NS_RELEASE_THIS();

}