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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// A proxy for NPObject that sends all calls to the object to an NPObjectStub
// running in a different process.
#ifndef CHROME_PLUGIN_NPOBJECT_PROXY_H__
#define CHROME_PLUGIN_NPOBJECT_PROXY_H__
#include "base/ref_counted.h"
#include "bindings/npruntime.h"
#include "chrome/common/ipc_channel.h"
class PluginChannelBase;
struct NPObject;
struct NPVariant_Param;
// When running a plugin in a different process from the renderer, we need to
// proxy calls to NPObjects across process boundaries. This happens both ways,
// as a plugin can get an NPObject for the window, and a page can get an
// NPObject for the plugin. In the process that interacts with the NPobject we
// give it an NPObjectProxy instead. All calls to it are sent across an IPC
// channel (specifically, a PluginChannelBase). The NPObjectStub on the other
// side translates the IPC messages into calls to the actual NPObject, and
// returns the marshalled result.
class NPObjectProxy : public IPC::Channel::Listener,
public IPC::Message::Sender {
public:
~NPObjectProxy();
static NPObject* Create(PluginChannelBase* channel,
int route_id,
void* npobject_ptr,
HANDLE modal_dialog_event);
// IPC::Message::Sender implementation:
bool Send(IPC::Message* msg);
int route_id() { return route_id_; }
PluginChannelBase* channel() { return channel_; }
// Returns the real NPObject's pointer (obviously only valid in the other
// process).
void* npobject_ptr() { return npobject_ptr_; }
// The next 8 functions are called on NPObjects from the plugin and browser.
static bool NPHasMethod(NPObject *obj,
NPIdentifier name);
static bool NPInvoke(NPObject *obj,
NPIdentifier name,
const NPVariant *args,
uint32_t arg_count,
NPVariant *result);
static bool NPInvokeDefault(NPObject *npobj,
const NPVariant *args,
uint32_t arg_count,
NPVariant *result);
static bool NPHasProperty(NPObject *obj,
NPIdentifier name);
static bool NPGetProperty(NPObject *obj,
NPIdentifier name,
NPVariant *result);
static bool NPSetProperty(NPObject *obj,
NPIdentifier name,
const NPVariant *value);
static bool NPRemoveProperty(NPObject *obj,
NPIdentifier name);
static bool NPNEnumerate(NPObject *obj,
NPIdentifier **value,
uint32_t *count);
// The next two functions are only called on NPObjects from the browser.
static bool NPNEvaluate(NPP npp,
NPObject *obj,
NPString *script,
NPVariant *result);
static void NPNSetException(NPObject *obj,
const NPUTF8 *message);
static bool NPInvokePrivate(NPP npp,
NPObject *obj,
bool is_default,
NPIdentifier name,
const NPVariant *args,
uint32_t arg_count,
NPVariant *result);
static NPObjectProxy* GetProxy(NPObject* object);
static const NPClass* npclass() { return &npclass_proxy_; }
private:
NPObjectProxy(PluginChannelBase* channel,
int route_id,
void* npobject_ptr,
HANDLE modal_dialog_event);
// IPC::Channel::Listener implementation:
void OnMessageReceived(const IPC::Message& msg);
void OnChannelError();
static NPObject* NPAllocate(NPP, NPClass*);
static void NPDeallocate(NPObject* npObj);
// This function is only caled on NPObjects from the plugin.
static void NPPInvalidate(NPObject *obj);
static NPClass npclass_proxy_;
int route_id_;
void* npobject_ptr_;
scoped_refptr<PluginChannelBase> channel_;
HANDLE modal_dialog_event_;
};
#endif // CHROME_PLUGIN_NPOBJECT_PROXY_H__
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