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      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 // Helper functions that are used by the NPObject proxy and stub.
      6 
      7 #ifndef CONTENT_NPAPI_CHILD_NPOBJECT_UTIL_H_
      8 #define CONTENT_NPAPI_CHILD_NPOBJECT_UTIL_H_
      9 
     10 #include "build/build_config.h"
     11 
     12 #if defined(OS_WIN)
     13 #include <windows.h>
     14 #endif
     15 
     16 #include "content/child/npapi/npobject_stub.h"
     17 
     18 class GURL;
     19 
     20 struct _NPVariant;
     21 
     22 typedef _NPVariant NPVariant;
     23 typedef void *NPIdentifier;
     24 
     25 namespace content {
     26 class NPChannelBase;
     27 struct NPIdentifier_Param;
     28 struct NPVariant_Param;
     29 
     30 // Needs to be called early in the plugin process lifetime, before any
     31 // plugin instances are initialized.
     32 void PatchNPNFunctions();
     33 
     34 // Returns true if the current process is a plugin process, or false otherwise.
     35 bool IsPluginProcess();
     36 
     37 // Creates an object similar to NPIdentifier that can be marshalled.
     38 void CreateNPIdentifierParam(NPIdentifier id, NPIdentifier_Param* param);
     39 
     40 // Creates an NPIdentifier from the marshalled object.
     41 NPIdentifier CreateNPIdentifier(const  NPIdentifier_Param& param);
     42 
     43 // Creates an object similar to NPVariant that can be marshalled.
     44 // If the containing NPObject happens to be an NPObject, then a stub
     45 // is created around it and param holds the routing id for it.
     46 // If release is true, the NPVariant object is released (except if
     47 // it contains an NPObject, since the stub will manage its lifetime).
     48 void CreateNPVariantParam(const NPVariant& variant,
     49                           NPChannelBase* channel,
     50                           NPVariant_Param* param,
     51                           bool release,
     52                           int render_view_id,
     53                           const GURL& page_url);
     54 
     55 // Creates an NPVariant from the marshalled object.
     56 // Returns true on success.
     57 bool CreateNPVariant(const NPVariant_Param& param,
     58                      NPChannelBase* channel,
     59                      NPVariant* result,
     60                      int render_view_id,
     61                      const GURL& page_url);
     62 
     63 #if defined(OS_WIN)
     64 // Given a plugin's HWND, returns an event associated with the WebContentsImpl
     65 // that's set when inside a messagebox.  This tells the plugin process that
     66 // the message queue should be pumped (as what would happen if everything was
     67 // in-process).  This avoids deadlocks when a plugin invokes javascript that
     68 // causes a message box to come up.
     69 HANDLE GetMessageBoxEvent(HWND hwnd);
     70 #endif  // defined(OS_WIN)
     71 
     72 }  // namespace content
     73 
     74 #endif  // CONTENT_NPAPI_CHILD_NPOBJECT_UTIL_H_
     75