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
12namespace 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.
17template <typename T>
18class 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    GuestViewBase* guest =
26        GuestViewBase::From(embedder_process_id, guest_instance_id);
27    if (!guest)
28      return NULL;
29    return guest->As<T>();
30  }
31
32  static T* FromWebContents(content::WebContents* contents) {
33    GuestViewBase* guest = GuestViewBase::FromWebContents(contents);
34    return guest ? guest->As<T>() : NULL;
35  }
36
37  static T* FromFrameID(int render_process_id, int render_frame_id) {
38    content::RenderFrameHost* render_frame_host =
39        content::RenderFrameHost::FromID(render_process_id, render_frame_id);
40    if (!render_frame_host) {
41      return NULL;
42    }
43    content::WebContents* web_contents =
44        content::WebContents::FromRenderFrameHost(render_frame_host);
45    return FromWebContents(web_contents);
46  }
47
48  T* GetOpener() const {
49    GuestViewBase* guest = GuestViewBase::GetOpener();
50    if (!guest)
51      return NULL;
52    return guest->As<T>();
53  }
54
55  void SetOpener(T* opener) {
56    GuestViewBase::SetOpener(opener);
57  }
58
59  // GuestViewBase implementation.
60  virtual const char* GetViewType() const OVERRIDE {
61    return T::Type;
62  }
63
64 protected:
65  GuestView(content::BrowserContext* browser_context,
66            int guest_instance_id)
67      : GuestViewBase(browser_context, guest_instance_id) {}
68  virtual ~GuestView() {}
69
70 private:
71  DISALLOW_COPY_AND_ASSIGN(GuestView);
72};
73
74}  // namespace extensions
75
76#endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_H_
77