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/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 8 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "BrowserStreamParent.h"
#include "PluginAsyncSurrogate.h"
#include "PluginInstanceParent.h"
#include "nsNPAPIPlugin.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/Unused.h"
// How much data are we willing to send across the wire
// in one chunk?
static const int32_t kSendDataChunk = 0xffff;
namespace mozilla {
namespace plugins {
BrowserStreamParent::BrowserStreamParent(PluginInstanceParent* npp,
NPStream* stream)
: mNPP(npp)
, mStream(stream)
, mDeferredDestroyReason(NPRES_DONE)
, mState(INITIALIZING)
{
mStream->pdata = static_cast<AStream*>(this);
nsNPAPIStreamWrapper* wrapper =
reinterpret_cast<nsNPAPIStreamWrapper*>(mStream->ndata);
if (wrapper) {
mStreamListener = wrapper->GetStreamListener();
}
}
BrowserStreamParent::~BrowserStreamParent()
{
mStream->pdata = nullptr;
}
void
BrowserStreamParent::ActorDestroy(ActorDestroyReason aWhy)
{
// Implement me! Bug 1005159
}
bool
BrowserStreamParent::RecvAsyncNPP_NewStreamResult(const NPError& rv,
const uint16_t& stype)
{
PLUGIN_LOG_DEBUG_FUNCTION;
PluginAsyncSurrogate* surrogate = mNPP->GetAsyncSurrogate();
MOZ_ASSERT(surrogate);
surrogate->AsyncCallArriving();
if (mState == DEFERRING_DESTROY) {
// We've been asked to destroy ourselves before init was complete.
mState = DYING;
Unused << SendNPP_DestroyStream(mDeferredDestroyReason);
return true;
}
NPError error = rv;
if (error == NPERR_NO_ERROR) {
if (!mStreamListener) {
return false;
}
if (mStreamListener->SetStreamType(stype)) {
mState = ALIVE;
} else {
error = NPERR_GENERIC_ERROR;
}
}
if (error != NPERR_NO_ERROR) {
surrogate->DestroyAsyncStream(mStream);
Unused << PBrowserStreamParent::Send__delete__(this);
}
return true;
}
bool
BrowserStreamParent::AnswerNPN_RequestRead(const IPCByteRanges& ranges,
NPError* result)
{
PLUGIN_LOG_DEBUG_FUNCTION;
switch (mState) {
case INITIALIZING:
NS_ERROR("Requesting a read before initialization has completed");
*result = NPERR_GENERIC_ERROR;
return false;
case ALIVE:
break;
case DYING:
*result = NPERR_GENERIC_ERROR;
return true;
default:
NS_ERROR("Unexpected state");
return false;
}
if (!mStream)
return false;
if (ranges.Length() > INT32_MAX)
return false;
UniquePtr<NPByteRange[]> rp(new NPByteRange[ranges.Length()]);
for (uint32_t i = 0; i < ranges.Length(); ++i) {
rp[i].offset = ranges[i].offset;
rp[i].length = ranges[i].length;
rp[i].next = &rp[i + 1];
}
rp[ranges.Length() - 1].next = nullptr;
*result = mNPP->mNPNIface->requestread(mStream, rp.get());
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 || INITIALIZING == mState,
"NPP_DestroyStream called twice?");
bool stillInitializing = INITIALIZING == mState;
if (stillInitializing) {
mState = DEFERRING_DESTROY;
mDeferredDestroyReason = reason;
} else {
mState = DYING;
Unused << SendNPP_DestroyStream(reason);
}
}
bool
BrowserStreamParent::RecvStreamDestroyed()
{
if (DYING != mState) {
NS_ERROR("Unexpected state");
return false;
}
mStreamPeer = nullptr;
mState = DELETING;
return Send__delete__(this);
}
int32_t
BrowserStreamParent::WriteReady()
{
if (mState == INITIALIZING) {
return 0;
}
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,
mStream->end,
nsCString(static_cast<char*>(buffer), len)) ?
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
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