text: // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef CHROME_BROWSER_APP_MODAL_DIALOG_QUEUE_H__
  #define CHROME_BROWSER_APP_MODAL_DIALOG_QUEUE_H__
  
  #include <queue>
  
  #include "chrome/views/app_modal_dialog_delegate.h"
  
  // Keeps a queue of AppModalDialogDelegates, making sure only one app modal
  // dialog is shown at a time.
  class AppModalDialogQueue {
   public:
    // Adds a modal dialog to the queue, if there are no other dialogs in the
    // queue, the dialog will be shown immediately. Once it is shown, the
    // most recently active browser window (or whichever is currently active)
    // will be app modal, meaning it will be activated if the user tries to
    // activate any other browser windows. So the dialog being shown should
    // assure it is the child of BrowserList::GetLastActive() so that it is
    // activated as well. See browser_list.h for more notes about our somewhat
    // sloppy app modality.
    // Note: The AppModalDialogDelegate |dialog| must be window modal before it
    // can be added as app modal.
    static void AddDialog(views::AppModalDialogDelegate* dialog);
  
    // Removes the current dialog in the queue (the one that is being shown).
    // Shows the next dialog in the queue, if any is present. This does not
    // ensure that the currently showing dialog is closed, it just makes it no
    // longer app modal.
    static void ShowNextDialog();
  
    // Activates and shows the current dialog, if the user clicks on one of the
    // windows disabled by the presence of an app modal dialog. This forces
    // the window to be visible on the display even if desktop manager software
    // opened the dialog on another virtual desktop. Assumes there is currently a
    // dialog being shown. (Call BrowserList::IsShowingAppModalDialog to test
    // this condition).
    static void ActivateModalDialog();
  
   private:
    // Shows |dialog| and notifies the BrowserList that a modal dialog is showing.
    static void ShowModalDialog(views::AppModalDialogDelegate* dialog);
  
    // Contains all app modal dialogs which are waiting to be shown, with the
    // currently modal dialog at the front of the queue.
    static std::queue<views::AppModalDialogDelegate*>*
        app_modal_dialog_queue_;
  };
  
  #endif // CHROME_BROWSER_APP_MODAL_DIALOG_QUEUE_H__
  
  