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      1 // Copyright (c) 2011 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_EXTENSIONS_EXTENSION_UNINSTALL_DIALOG_H_
      6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_UNINSTALL_DIALOG_H_
      7 #pragma once
      8 
      9 #include "base/basictypes.h"
     10 #include "base/compiler_specific.h"
     11 #include "chrome/browser/extensions/image_loading_tracker.h"
     12 #include "third_party/skia/include/core/SkBitmap.h"
     13 
     14 class MessageLoop;
     15 class Profile;
     16 
     17 class ExtensionUninstallDialog : public ImageLoadingTracker::Observer {
     18  public:
     19   class Delegate {
     20    public:
     21     // We call this method to signal that the uninstallation should continue.
     22     virtual void ExtensionDialogAccepted() = 0;
     23 
     24     // We call this method to signal that the uninstallation should stop.
     25     virtual void ExtensionDialogCanceled() = 0;
     26 
     27    protected:
     28     virtual ~Delegate() {}
     29   };
     30 
     31   explicit ExtensionUninstallDialog(Profile* profile);
     32   virtual ~ExtensionUninstallDialog();
     33 
     34   // This is called by the extensions management page to verify whether the
     35   // uninstallation should proceed.
     36   // Starts the process of showing a confirmation UI, which is split into two.
     37   // 1) Set off a 'load icon' task.
     38   // 2) Handle the load icon response and show the UI (OnImageLoaded).
     39   void ConfirmUninstall(Delegate* delegate, const Extension* extension);
     40 
     41  private:
     42   // Creates an appropriate ExtensionUninstallDialog for the platform.
     43   static void Show(Profile* profile,
     44                    Delegate* delegate,
     45                    const Extension* extension,
     46                    SkBitmap* icon);
     47 
     48   // Sets the icon that will be used in any UI. If |icon| is NULL, or contains
     49   // an empty bitmap, then a default icon will be used instead.
     50   void SetIcon(SkBitmap* icon);
     51 
     52   // ImageLoadingTracker::Observer:
     53   virtual void OnImageLoaded(SkBitmap* image,
     54                              const ExtensionResource& resource,
     55                              int index) OVERRIDE;
     56 
     57   Profile* profile_;
     58   MessageLoop* ui_loop_;
     59 
     60   // The delegate we will call Accepted/Canceled on after confirmation UI.
     61   Delegate* delegate_;
     62 
     63   // The extension we are showing the UI for.
     64   const Extension* extension_;
     65 
     66   // Keeps track of extension images being loaded on the File thread for the
     67   // purpose of showing the install UI.
     68   ImageLoadingTracker tracker_;
     69 
     70   // The extensions icon.
     71   SkBitmap icon_;
     72 
     73   DISALLOW_COPY_AND_ASSIGN(ExtensionUninstallDialog);
     74 };
     75 
     76 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_UNINSTALL_DIALOG_H_
     77