/* 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/. */

function closeWindow(aClose, aPromptFunction) {
  let { AppConstants } = ChromeUtils.import("resource://gre/modules/AppConstants.jsm", {});

  // Closing the last window doesn't quit the application on OS X.
  if (AppConstants.platform != "macosx") {
    var windowCount = 0;
    for (let w of Services.wm.getEnumerator(null)) {
      if (w.closed) {
        continue;
      }
      if (++windowCount == 2)
        break;
    }

    // If we're down to the last window and someone tries to shut down, check to make sure we can!
    if (windowCount == 1 && !canQuitApplication("lastwindow"))
      return false;
    if (windowCount != 1 && typeof(aPromptFunction) == "function" && !aPromptFunction())
      return false;
  } else if (typeof(aPromptFunction) == "function" && !aPromptFunction()) {
    return false;
  }

  if (aClose) {
    window.close();
    return window.closed;
  }

  return true;
}

function canQuitApplication(aData) {
  try {
    var cancelQuit = Cc["@mozilla.org/supports-PRBool;1"]
                              .createInstance(Ci.nsISupportsPRBool);
    Services.obs.notifyObservers(cancelQuit, "quit-application-requested", aData || null);

    // Something aborted the quit process.
    if (cancelQuit.data)
      return false;
  } catch (ex) { }
  return true;
}

function goQuitApplication() {
  if (!canQuitApplication())
    return false;

  Services.startup.quit(Ci.nsIAppStartup.eAttemptQuit);
  return true;
}

//
// Command Updater functions
//
function goUpdateCommand(aCommand) {
  try {
    var controller = top.document.commandDispatcher
                        .getControllerForCommand(aCommand);

    var enabled = false;
    if (controller)
      enabled = controller.isCommandEnabled(aCommand);

    goSetCommandEnabled(aCommand, enabled);
  } catch (e) {
    Cu.reportError("An error occurred updating the " +
                   aCommand + " command: " + e);
  }
}

function goDoCommand(aCommand) {
  try {
    var controller = top.document.commandDispatcher
                        .getControllerForCommand(aCommand);
    if (controller && controller.isCommandEnabled(aCommand))
      controller.doCommand(aCommand);
  } catch (e) {
    Cu.reportError("An error occurred executing the " +
                   aCommand + " command: " + e);
  }
}


function goSetCommandEnabled(aID, aEnabled) {
  var node = document.getElementById(aID);

  if (node) {
    if (aEnabled)
      node.removeAttribute("disabled");
    else
      node.setAttribute("disabled", "true");
  }
}