content/renderer/pepper/host_resource_var.h

   1 // Copyright 2013 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 CONTENT_RENDERER_PEPPER_HOST_RESOURCE_VAR_H_
   6 #define CONTENT_RENDERER_PEPPER_HOST_RESOURCE_VAR_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "ipc/ipc_message.h"
  10 #include "ppapi/c/pp_resource.h"
  11 #include "ppapi/shared_impl/resource_var.h"
  12 #include "ppapi/shared_impl/var.h"
  13
  14 namespace content {
  15
  16 // Represents a resource var, usable on the host side. Can either have a
  17 // plugin-side resource or a pending resource host.
  18 class HostResourceVar : public ppapi::ResourceVar {
  19  public:
  20   // Makes a null resource var.
  21   HostResourceVar();
  22
  23   // Makes a resource var with an existing plugin-side resource.
  24   explicit HostResourceVar(PP_Resource pp_resource);
  25
  26   // Makes a resource var with a pending resource host.
  27   // The |pending_renderer_host_id| is a pending resource host ID in the
  28   // renderer to attach from the plugin. Depending on the type of resource, this
  29   // may be 0. The |creation_message| contains additional data needed to create
  30   // the plugin-side resource. Its type depends on the type of resource.
  31   HostResourceVar(int pending_renderer_host_id,
  32                   const IPC::Message& creation_message);
  33
  34   // ResourceVar override.
  35   PP_Resource GetPPResource() const override;
  36   int GetPendingRendererHostId() const override;
  37   int GetPendingBrowserHostId() const override;
  38   const IPC::Message* GetCreationMessage() const override;
  39   bool IsPending() const override;
  40
  41   void set_pending_browser_host_id(int id) { pending_browser_host_id_ = id; }
  42
  43  protected:
  44   ~HostResourceVar() override;
  45
  46  private:
  47   // Real resource ID in the plugin. 0 if one has not yet been created
  48   // (indicating that there is a pending resource host).
  49   PP_Resource pp_resource_;
  50
  51   // Pending resource host ID in the renderer.
  52   int pending_renderer_host_id_;
  53
  54   // Pending resource host ID in the browser.
  55   int pending_browser_host_id_;
  56
  57   // If the plugin-side resource has not yet been created, carries a message to
  58   // create a resource of the specific type on the plugin side. Otherwise, NULL.
  59   scoped_ptr<IPC::Message> creation_message_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(HostResourceVar);
  62 };
  63
  64 }  // namespace content
  65
  66 #endif  // CONTENT_RENDERER_PEPPER_HOST_RESOURCE_VAR_H_