remoting/host/plugin/host_plugin_utils.h

   1 // Copyright (c) 2012 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 REMOTING_HOST_PLUGIN_HOST_PLUGIN_UTILS_H_
   6 #define REMOTING_HOST_PLUGIN_HOST_PLUGIN_UTILS_H_
   7
   8 #include <string>
   9
  10 #include "third_party/npapi/bindings/npapi.h"
  11 #include "third_party/npapi/bindings/npfunctions.h"
  12 #include "third_party/npapi/bindings/npruntime.h"
  13
  14 namespace remoting {
  15
  16 // Global netscape functions initialized in NP_Initialize.
  17 extern NPNetscapeFuncs* g_npnetscape_funcs;
  18
  19 // Convert an NPIdentifier into a std::string.
  20 std::string StringFromNPIdentifier(NPIdentifier identifier);
  21
  22 // Convert an NPVariant into a std::string.
  23 std::string StringFromNPVariant(const NPVariant& variant);
  24
  25 // Convert a std::string into an NPVariant.
  26 // Caller is responsible for making sure that NPN_ReleaseVariantValue is
  27 // called on returned value.
  28 NPVariant NPVariantFromString(const std::string& val);
  29
  30 // Convert an NPVariant into an NSPObject.
  31 NPObject* ObjectFromNPVariant(const NPVariant& variant);
  32
  33 // Scoped reference pointer for NPObjects. All objects using this class
  34 // must be owned by g_npnetscape_funcs.
  35 class ScopedRefNPObject {
  36  public:
  37   ScopedRefNPObject();
  38   explicit ScopedRefNPObject(NPObject* object);
  39   explicit ScopedRefNPObject(const ScopedRefNPObject& object);
  40   ~ScopedRefNPObject();
  41
  42   // Release the held reference and replace it with |object|, incrementing
  43   // its reference count.
  44   ScopedRefNPObject& operator=(NPObject* object);
  45   ScopedRefNPObject& operator=(const ScopedRefNPObject& object);
  46
  47   NPObject* get() const { return object_; }
  48
  49  private:
  50   NPObject* object_;
  51 };
  52
  53 }  // namespace remoting
  54
  55 #endif  // REMOTING_HOST_PLUGIN_HOST_PLUGIN_UTILS_H_