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      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_EXTENSIONS_EXTENSION_UNINSTALL_DIALOG_H_
      6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_UNINSTALL_DIALOG_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/compiler_specific.h"
     10 #include "base/memory/weak_ptr.h"
     11 #include "ui/gfx/image/image_skia.h"
     12 #include "ui/gfx/native_widget_types.h"
     13 
     14 class Profile;
     15 
     16 namespace base {
     17 class MessageLoop;
     18 }
     19 
     20 namespace gfx {
     21 class Image;
     22 }
     23 
     24 namespace extensions {
     25 class Extension;
     26 
     27 class ExtensionUninstallDialog
     28     : public base::SupportsWeakPtr<ExtensionUninstallDialog> {
     29  public:
     30   class Delegate {
     31    public:
     32     // We call this method to signal that the uninstallation should continue.
     33     virtual void ExtensionUninstallAccepted() = 0;
     34 
     35     // We call this method to signal that the uninstallation should stop.
     36     virtual void ExtensionUninstallCanceled() = 0;
     37 
     38    protected:
     39     virtual ~Delegate() {}
     40   };
     41 
     42   // Creates a platform specific implementation of ExtensionUninstallDialog. The
     43   // dialog will be modal to |parent|, or a non-modal dialog if |parent| is
     44   // NULL.
     45   static ExtensionUninstallDialog* Create(Profile* profile,
     46                                           gfx::NativeWindow parent,
     47                                           Delegate* delegate);
     48 
     49   virtual ~ExtensionUninstallDialog();
     50 
     51   // This is called to verify whether the uninstallation should proceed.
     52   // Starts the process of showing a confirmation UI, which is split into two.
     53   // 1) Set off a 'load icon' task.
     54   // 2) Handle the load icon response and show the UI (OnImageLoaded).
     55   void ConfirmUninstall(const Extension* extension);
     56 
     57   // This shows the same dialog as above, except it also shows which extension
     58   // triggered the dialog by calling chrome.management.uninstall API.
     59   void ConfirmProgrammaticUninstall(const Extension* extension,
     60                                     const Extension* triggering_extension);
     61 
     62   std::string GetHeadingText();
     63 
     64  protected:
     65   // Constructor used by the derived classes.
     66   ExtensionUninstallDialog(Profile* profile, Delegate* delegate);
     67 
     68   // TODO(sashab): Remove protected members: crbug.com/397395
     69   Profile* const profile_;
     70 
     71   // The delegate we will call Accepted/Canceled on after confirmation dialog.
     72   Delegate* delegate_;
     73 
     74   // The extension we are showing the dialog for.
     75   const Extension* extension_;
     76 
     77   // The extension triggering the dialog if the dialog was shown by
     78   // chrome.management.uninstall.
     79   const Extension* triggering_extension_;
     80 
     81   // The extensions icon.
     82   gfx::ImageSkia icon_;
     83 
     84  private:
     85   // Sets the icon that will be used in the dialog. If |icon| contains an empty
     86   // image, then we use a default icon instead.
     87   void SetIcon(const gfx::Image& image);
     88 
     89   void OnImageLoaded(const std::string& extension_id, const gfx::Image& image);
     90 
     91   // Displays the prompt. This should only be called after loading the icon.
     92   // The implementations of this method are platform-specific.
     93   virtual void Show() = 0;
     94 
     95   base::MessageLoop* ui_loop_;
     96 
     97   DISALLOW_COPY_AND_ASSIGN(ExtensionUninstallDialog);
     98 };
     99 
    100 }  // namespace extensions
    101 
    102 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_UNINSTALL_DIALOG_H_
    103