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