components/guest_view/browser/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 COMPONENTS_GUEST_VIEW_BROWSER_GUEST_VIEW_H_
   6 #define COMPONENTS_GUEST_VIEW_BROWSER_GUEST_VIEW_H_
   7
   8 #include "components/guest_view/browser/guest_view_base.h"
   9 #include "components/guest_view/browser/guest_view_manager.h"
  10 #include "content/public/browser/render_frame_host.h"
  11
  12 namespace guest_view {
  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 T* From(int embedder_process_id, int guest_instance_id) {
  21     auto guest = GuestViewBase::From(embedder_process_id, guest_instance_id);
  22     if (!guest)
  23       return nullptr;
  24     return guest->As<T>();
  25   }
  26
  27   static T* FromWebContents(const content::WebContents* contents) {
  28     auto guest = GuestViewBase::FromWebContents(contents);
  29     return guest ? guest->As<T>() : nullptr;
  30   }
  31
  32   static T* FromFrameID(int render_process_id, int render_frame_id) {
  33     auto render_frame_host =
  34         content::RenderFrameHost::FromID(render_process_id, render_frame_id);
  35     if (!render_frame_host)
  36       return nullptr;
  37
  38     auto web_contents =
  39         content::WebContents::FromRenderFrameHost(render_frame_host);
  40     return FromWebContents(web_contents);
  41   }
  42
  43   T* GetOpener() const {
  44     GuestViewBase* guest = GuestViewBase::GetOpener();
  45     if (!guest)
  46       return nullptr;
  47     return guest->As<T>();
  48   }
  49
  50   void SetOpener(T* opener) {
  51     GuestViewBase::SetOpener(opener);
  52   }
  53
  54   // GuestViewBase implementation.
  55   const char* GetViewType() const final {
  56     return T::Type;
  57   }
  58
  59  protected:
  60   explicit GuestView(content::WebContents* owner_web_contents)
  61       : GuestViewBase(owner_web_contents) {}
  62   ~GuestView() override {}
  63
  64  private:
  65   DISALLOW_COPY_AND_ASSIGN(GuestView);
  66 };
  67
  68 }  // namespace guest_view
  69
  70 #endif  // COMPONENTS_GUEST_VIEW_BROWSER_GUEST_VIEW_H_