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
18class GURL;
19
20struct _NPVariant;
21
22typedef _NPVariant NPVariant;
23typedef void *NPIdentifier;
24
25namespace content {
26class NPChannelBase;
27struct NPIdentifier_Param;
28struct NPVariant_Param;
29
30// Needs to be called early in the plugin process lifetime, before any
31// plugin instances are initialized.
32void PatchNPNFunctions();
33
34// Returns true if the current process is a plugin process, or false otherwise.
35bool IsPluginProcess();
36
37// Creates an object similar to NPIdentifier that can be marshalled.
38void CreateNPIdentifierParam(NPIdentifier id, NPIdentifier_Param* param);
39
40// Creates an NPIdentifier from the marshalled object.
41NPIdentifier 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).
48void 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.
57bool 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.
69HANDLE GetMessageBoxEvent(HWND hwnd);
70#endif  // defined(OS_WIN)
71
72}  // namespace content
73
74#endif  // CONTENT_NPAPI_CHILD_NPOBJECT_UTIL_H_
75