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