gecko-dev/dom/plugins/ipc/BrowserStreamParent.cpp

154 lines
3.3 KiB
C++

/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 8 -*- */
#include "BrowserStreamParent.h"
#include "PluginInstanceParent.h"
#include "nsNPAPIPlugin.h"
#include "mozilla/unused.h"
// How much data are we willing to send across the wire
// in one chunk?
static const int32_t kSendDataChunk = 0x4000;
namespace mozilla {
namespace plugins {
BrowserStreamParent::BrowserStreamParent(PluginInstanceParent* npp,
NPStream* stream)
: mNPP(npp)
, mStream(stream)
, mState(ALIVE)
{
mStream->pdata = static_cast<AStream*>(this);
}
BrowserStreamParent::~BrowserStreamParent()
{
}
bool
BrowserStreamParent::AnswerNPN_RequestRead(const IPCByteRanges& ranges,
NPError* result)
{
PLUGIN_LOG_DEBUG_FUNCTION;
switch (mState) {
case ALIVE:
break;
case DYING:
*result = NPERR_GENERIC_ERROR;
return true;
default:
NS_ERROR("Unexpected state");
return false;
}
if (!mStream)
return false;
if (ranges.size() > PR_INT32_MAX)
return false;
nsAutoArrayPtr<NPByteRange> rp(new NPByteRange[ranges.size()]);
for (PRUint32 i = 0; i < ranges.size(); ++i) {
rp[i].offset = ranges[i].offset;
rp[i].length = ranges[i].length;
rp[i].next = &rp[i + 1];
}
rp[ranges.size() - 1].next = NULL;
*result = mNPP->mNPNIface->requestread(mStream, rp);
return true;
}
bool
BrowserStreamParent::RecvNPN_DestroyStream(const NPReason& reason)
{
switch (mState) {
case ALIVE:
break;
case DYING:
return true;
default:
NS_ERROR("Unexpected state");
return false;
};
mNPP->mNPNIface->destroystream(mNPP->mNPP, mStream, reason);
return true;
}
void
BrowserStreamParent::NPP_DestroyStream(NPReason reason)
{
NS_ASSERTION(ALIVE == mState, "NPP_DestroyStream called twice?");
mState = DYING;
unused << SendNPP_DestroyStream(reason);
}
bool
BrowserStreamParent::RecvStreamDestroyed()
{
if (DYING != mState) {
NS_ERROR("Unexpected state");
return false;
}
mStreamPeer = NULL;
mState = DELETING;
return Send__delete__(this);
}
int32_t
BrowserStreamParent::WriteReady()
{
return kSendDataChunk;
}
int32_t
BrowserStreamParent::Write(int32_t offset,
int32_t len,
void* buffer)
{
PLUGIN_LOG_DEBUG_FUNCTION;
NS_ASSERTION(ALIVE == mState, "Sending data after NPP_DestroyStream?");
NS_ASSERTION(len > 0, "Non-positive length to NPP_Write");
if (len > kSendDataChunk)
len = kSendDataChunk;
return SendWrite(offset,
nsCString(static_cast<char*>(buffer), len),
mStream->end) ?
len : -1;
}
void
BrowserStreamParent::StreamAsFile(const char* fname)
{
PLUGIN_LOG_DEBUG_FUNCTION;
NS_ASSERTION(ALIVE == mState,
"Calling streamasfile after NPP_DestroyStream?");
// Make sure our stream survives until the plugin process tells us we've
// been destroyed (until RecvStreamDestroyed() is called). Since we retain
// mStreamPeer at most once, we won't get in trouble if StreamAsFile() is
// called more than once.
if (!mStreamPeer) {
nsNPAPIPlugin::RetainStream(mStream, getter_AddRefs(mStreamPeer));
}
unused << SendNPP_StreamAsFile(nsCString(fname));
return;
}
} // namespace plugins
} // namespace mozilla