chrome/browser/plugins/plugin_installer_observer.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_PLUGINS_PLUGIN_INSTALLER_OBSERVER_H_
   6 #define CHROME_BROWSER_PLUGINS_PLUGIN_INSTALLER_OBSERVER_H_
   7
   8 #include <string>
   9
  10 class PluginInstaller;
  11
  12 class PluginInstallerObserver {
  13  public:
  14   explicit PluginInstallerObserver(PluginInstaller* installer);
  15   virtual ~PluginInstallerObserver();
  16
  17  protected:
  18   PluginInstaller* installer() const { return installer_; }
  19
  20  private:
  21   friend class PluginInstaller;
  22
  23   virtual void DownloadStarted();
  24   virtual void DownloadFinished();
  25   virtual void DownloadError(const std::string& message);
  26   virtual void DownloadCancelled();
  27
  28   // Weak pointer; Owned by PluginFinder, which is a singleton.
  29   PluginInstaller* installer_;
  30 };
  31
  32 // A WeakPluginInstallerObserver is like a weak pointer to the installer, in the
  33 // sense that if only weak observers are left, we don't need to show
  34 // installation UI anymore.
  35 class WeakPluginInstallerObserver : public PluginInstallerObserver {
  36  public:
  37   explicit WeakPluginInstallerObserver(PluginInstaller* installer);
  38   virtual ~WeakPluginInstallerObserver();
  39
  40  private:
  41   friend class PluginInstaller;
  42
  43   virtual void OnlyWeakObserversLeft();
  44 };
  45
  46 #endif  // CHROME_BROWSER_PLUGINS_PLUGIN_INSTALLER_OBSERVER_H_