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// Copyright (c) 2011 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_UI_COCOA_THEME_INSTALL_BUBBLE_VIEW_H_
#define CHROME_BROWSER_UI_COCOA_THEME_INSTALL_BUBBLE_VIEW_H_
#pragma once
#include "content/common/notification_observer.h"
#include "content/common/notification_registrar.h"
@class NSWindow;
@class ThemeInstallBubbleViewCocoa;
// ThemeInstallBubbleView is a view that provides a "Loading..." bubble in the
// center of a browser window for use when an extension or theme is loaded.
// (The Browser class only calls it to install itself into the currently active
// browser window.) If an extension is being applied, the bubble goes away
// immediately. If a theme is being applied, it disappears when the theme has
// been loaded. The purpose of this bubble is to warn the user that the browser
// may be unresponsive while the theme is being installed.
//
// Edge case: note that if one installs a theme in one window and then switches
// rapidly to another window to install a theme there as well (in the short time
// between install begin and theme caching seizing the UI thread), the loading
// bubble will only appear over the first window, as there is only ever one
// instance of the bubble.
class ThemeInstallBubbleView : public NotificationObserver {
public:
~ThemeInstallBubbleView();
// NotificationObserver
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
// Show the loading bubble.
static void Show(NSWindow* window);
private:
explicit ThemeInstallBubbleView(NSWindow* window);
// The one copy of the loading bubble.
static ThemeInstallBubbleView* view_;
// A scoped container for notification registries.
NotificationRegistrar registrar_;
// Shut down the popup and remove our notifications.
void Close();
// The actual Cocoa view implementing the bubble.
ThemeInstallBubbleViewCocoa* cocoa_view_;
// Multiple loads can be started at once. Only show one bubble, and keep
// track of number of loads happening. Close bubble when num_loads < 1.
int num_loads_extant_;
DISALLOW_COPY_AND_ASSIGN(ThemeInstallBubbleView);
};
#endif // CHROME_BROWSER_UI_COCOA_THEME_INSTALL_BUBBLE_VIEW_H_
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