content/child/npapi/npobject_stub.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 // A class that receives IPC messages from an NPObjectProxy and calls the real
   6 // NPObject.
   7
   8 #ifndef CONTENT_CHILD_NPAPI_NPOBJECT_STUB_H_
   9 #define CONTENT_CHILD_NPAPI_NPOBJECT_STUB_H_
  10
  11 #include <vector>
  12
  13 #include "base/memory/ref_counted.h"
  14 #include "base/memory/weak_ptr.h"
  15 #include "content/child/npapi/npobject_base.h"
  16 #include "ipc/ipc_listener.h"
  17 #include "ipc/ipc_sender.h"
  18 #include "url/gurl.h"
  19
  20 struct NPObject;
  21
  22 namespace content {
  23 class NPChannelBase;
  24 struct NPIdentifier_Param;
  25 struct NPVariant_Param;
  26
  27 // This wraps an NPObject and converts IPC messages from NPObjectProxy to calls
  28 // to the object.  The results are marshalled back.  See npobject_proxy.h for
  29 // more information.
  30 class NPObjectStub : public IPC::Listener,
  31                      public IPC::Sender,
  32                      public base::SupportsWeakPtr<NPObjectStub>,
  33                      public NPObjectBase {
  34  public:
  35   NPObjectStub(NPObject* npobject,
  36                NPChannelBase* channel,
  37                int route_id,
  38                int render_view_id,
  39                const GURL& page_url);
  40   ~NPObjectStub() override;
  41
  42   // Schedules tear-down of this stub.  The underlying NPObject reference is
  43   // released, and further invokations from the IPC channel will fail once this
  44   // call has returned.  Deletion of the stub is deferred to the main loop, in
  45   // case it is touched as the stack unwinds.  DeleteSoon() is safe to call
  46   // more than once, until control returns to the main loop.
  47   void DeleteSoon();
  48
  49   // IPC::Sender implementation:
  50   bool Send(IPC::Message* msg) override;
  51
  52   // NPObjectBase implementation.
  53   NPObject* GetUnderlyingNPObject() override;
  54   IPC::Listener* GetChannelListener() override;
  55
  56  private:
  57   // IPC::Listener implementation:
  58   bool OnMessageReceived(const IPC::Message& message) override;
  59   void OnChannelError() override;
  60
  61   // message handlers
  62   void OnRelease(IPC::Message* reply_msg);
  63   void OnHasMethod(const NPIdentifier_Param& name,
  64                    bool* result);
  65   void OnInvoke(bool is_default,
  66                 const NPIdentifier_Param& method,
  67                 const std::vector<NPVariant_Param>& args,
  68                 IPC::Message* reply_msg);
  69   void OnHasProperty(const NPIdentifier_Param& name,
  70                      bool* result);
  71   void OnGetProperty(const NPIdentifier_Param& name,
  72                      NPVariant_Param* property,
  73                      bool* result);
  74   void OnSetProperty(const NPIdentifier_Param& name,
  75                      const NPVariant_Param& property,
  76                      IPC::Message* reply_msg);
  77   void OnRemoveProperty(const NPIdentifier_Param& name,
  78                         bool* result);
  79   void OnInvalidate();
  80   void OnEnumeration(std::vector<NPIdentifier_Param>* value,
  81                      bool* result);
  82   void OnConstruct(const std::vector<NPVariant_Param>& args,
  83                    IPC::Message* reply_msg);
  84   void OnEvaluate(const std::string& script, bool popups_allowed,
  85                   IPC::Message* reply_msg);
  86
  87  private:
  88   NPObject* npobject_;
  89   scoped_refptr<NPChannelBase> channel_;
  90   int route_id_;
  91   int render_view_id_;
  92
  93   // The url of the main frame hosting the plugin.
  94   GURL page_url_;
  95 };
  96
  97 }  // namespace content
  98
  99 #endif  // CONTENT_CHILD_NPAPI_NPOBJECT_STUB_H_