content/renderer/browser_plugin/browser_plugin_bindings.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 CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_BINDINGS_H__
   6 #define CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_BINDINGS_H__
   7
   8 #include "base/memory/scoped_vector.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "ppapi/shared_impl/resource.h"
  11 #include "third_party/npapi/bindings/npruntime.h"
  12
  13 namespace content {
  14
  15 class BrowserPlugin;
  16 class BrowserPluginMethodBinding;
  17 class BrowserPluginPropertyBinding;
  18
  19 class BrowserPluginBindings {
  20  public:
  21   // BrowserPluginNPObject is a simple struct that adds a pointer back to a
  22   // BrowserPluginBindings instance.  This way, we can use an NPObject to allow
  23   // JavaScript interactions without forcing BrowserPluginBindings to inherit
  24   // from NPObject.
  25   struct BrowserPluginNPObject : public NPObject {
  26     BrowserPluginNPObject();
  27     ~BrowserPluginNPObject();
  28
  29     base::WeakPtr<BrowserPluginBindings> message_channel;
  30   };
  31
  32   explicit BrowserPluginBindings(BrowserPlugin* instance);
  33   ~BrowserPluginBindings();
  34
  35   NPObject* np_object() const { return np_object_; }
  36
  37   BrowserPlugin* instance() const { return instance_; }
  38
  39   bool HasMethod(NPIdentifier name) const;
  40
  41   bool InvokeMethod(NPIdentifier name,
  42                     const NPVariant* args,
  43                     uint32 arg_count,
  44                     NPVariant* result);
  45
  46   bool HasProperty(NPIdentifier name) const;
  47   bool SetProperty(NPObject* np_obj,
  48                    NPIdentifier name,
  49                    const NPVariant* variant);
  50   bool GetProperty(NPIdentifier name, NPVariant* result);
  51   bool RemoveProperty(NPObject *np_obj, NPIdentifier name);
  52  private:
  53   BrowserPlugin* instance_;
  54   // The NPObject we use to expose postMessage to JavaScript.
  55   BrowserPluginNPObject* np_object_;
  56
  57   typedef ScopedVector<BrowserPluginMethodBinding> BindingList;
  58   BindingList method_bindings_;
  59   typedef ScopedVector<BrowserPluginPropertyBinding> PropertyBindingList;
  60   PropertyBindingList property_bindings_;
  61
  62   // This is used to ensure pending tasks will not fire after this object is
  63   // destroyed.
  64   base::WeakPtrFactory<BrowserPluginBindings> weak_ptr_factory_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(BrowserPluginBindings);
  67 };
  68
  69 }  // namespace content
  70
  71 #endif  //  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_BINDINGS_H__