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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// A class that receives IPC messages from an NPObjectProxy and calls the real
// NPObject.
#ifndef CHROME_PLUGIN_NPOBJECT_STUB_H_
#define CHROME_PLUGIN_NPOBJECT_STUB_H_
#include <vector>
#include "base/ref_counted.h"
#include "ipc/ipc_channel.h"
namespace base {
class WaitableEvent;
}
class PluginChannelBase;
class WebPluginDelegateProxy;
struct NPIdentifier_Param;
struct NPObject;
struct NPVariant_Param;
// This wraps an NPObject and converts IPC messages from NPObjectProxy to calls
// to the object. The results are marshalled back. See npobject_proxy.h for
// more information.
class NPObjectStub : public IPC::Channel::Listener,
public IPC::Message::Sender {
public:
NPObjectStub(NPObject* npobject,
PluginChannelBase* channel,
int route_id,
base::WaitableEvent* modal_dialog_event);
~NPObjectStub();
// IPC::Message::Sender implementation:
bool Send(IPC::Message* msg);
// Called when the plugin widget that this NPObject came from is destroyed.
// This is needed because the renderer calls NPN_DeallocateObject on the
// window script object on destruction to avoid leaks.
void set_invalid() { valid_ = false; }
void set_proxy(WebPluginDelegateProxy* proxy) {
web_plugin_delegate_proxy_ = proxy;
}
private:
// IPC::Channel::Listener implementation:
void OnMessageReceived(const IPC::Message& message);
void OnChannelError();
// message handlers
void OnRelease(IPC::Message* reply_msg);
void OnHasMethod(const NPIdentifier_Param& name,
bool* result);
void OnInvoke(bool is_default,
const NPIdentifier_Param& method,
const std::vector<NPVariant_Param>& args,
IPC::Message* reply_msg);
void OnHasProperty(const NPIdentifier_Param& name,
bool* result);
void OnGetProperty(const NPIdentifier_Param& name,
NPVariant_Param* property,
bool* result);
void OnSetProperty(const NPIdentifier_Param& name,
const NPVariant_Param& property,
bool* result);
void OnRemoveProperty(const NPIdentifier_Param& name,
bool* result);
void OnInvalidate();
void OnEnumeration(std::vector<NPIdentifier_Param>* value,
bool* result);
void OnEvaluate(const std::string& script, bool popups_allowed,
IPC::Message* reply_msg);
void OnSetException(const std::string& message);
private:
NPObject* npobject_;
int route_id_;
scoped_refptr<PluginChannelBase> channel_;
base::WaitableEvent* modal_dialog_event_;
// These variables are used to ensure that the window script object is not
// called after the plugin widget has gone away, as the frame manually
// deallocates it and ignores the refcount to avoid leaks.
bool valid_;
WebPluginDelegateProxy* web_plugin_delegate_proxy_;
};
#endif // CHROME_PLUGIN_NPOBJECT_STUB_H_
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