extensions/browser/guest_view/guest_view.h

   1 // Copyright 2014 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 EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_H_
   6 #define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_H_
   7
   8 #include "base/bind.h"
   9 #include "content/public/browser/render_frame_host.h"
  10 #include "extensions/browser/guest_view/guest_view_base.h"
  11
  12 namespace extensions {
  13
  14 // A GuestView is the templated base class for out-of-process frames in the
  15 // chrome layer. GuestView is templated on its derived type to allow for type-
  16 // safe access. See GuestViewBase for more information.
  17 template <typename T>
  18 class GuestView : public GuestViewBase {
  19  public:
  20   static void Register() {
  21     GuestViewBase::RegisterGuestViewType(T::Type, base::Bind(&T::Create));
  22   }
  23
  24   static T* From(int embedder_process_id, int guest_instance_id) {
  25     auto guest = GuestViewBase::From(embedder_process_id, guest_instance_id);
  26     if (!guest)
  27       return nullptr;
  28     return guest->As<T>();
  29   }
  30
  31   static T* FromWebContents(const content::WebContents* contents) {
  32     auto guest = GuestViewBase::FromWebContents(contents);
  33     return guest ? guest->As<T>() : nullptr;
  34   }
  35
  36   static T* FromFrameID(int render_process_id, int render_frame_id) {
  37     auto render_frame_host =
  38         content::RenderFrameHost::FromID(render_process_id, render_frame_id);
  39     if (!render_frame_host)
  40       return nullptr;
  41
  42     auto web_contents =
  43         content::WebContents::FromRenderFrameHost(render_frame_host);
  44     return FromWebContents(web_contents);
  45   }
  46
  47   T* GetOpener() const {
  48     GuestViewBase* guest = GuestViewBase::GetOpener();
  49     if (!guest)
  50       return nullptr;
  51     return guest->As<T>();
  52   }
  53
  54   void SetOpener(T* opener) {
  55     GuestViewBase::SetOpener(opener);
  56   }
  57
  58   // GuestViewBase implementation.
  59   const char* GetViewType() const final {
  60     return T::Type;
  61   }
  62
  63  protected:
  64   explicit GuestView(content::WebContents* owner_web_contents)
  65       : GuestViewBase(owner_web_contents) {}
  66   ~GuestView() override {}
  67
  68  private:
  69   DISALLOW_COPY_AND_ASSIGN(GuestView);
  70 };
  71
  72 }  // namespace extensions
  73
  74 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_H_