widget/PluginWidgetProxy.cpp
author Valentin Gosu <valentin.gosu@gmail.com>
Fri, 02 Nov 2018 17:38:37 -0400
changeset 501038 8016d0d1a391f1327a0375fb6d4f20228b2784aa
parent 393801 6a7996fa2e1b842d363ceb68aba80e9ee94ef28e
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1503725 - Do not deallocate nsThreadShutdownContext when leaking thread. r=erahm, a=RyanVM Sometimes when we call ShutdownWithTimeout on a thread pool, the unresponsive thread that we leak will actually complete before the main thread is done. In that case, the thread will dereference the thread shutdown context, so we must intentionally leak it too. Differential Revision: https://phabricator.services.mozilla.com/D10645

/* 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 "PluginWidgetProxy.h"
#include "mozilla/dom/TabChild.h"
#include "mozilla/plugins/PluginWidgetChild.h"
#include "mozilla/plugins/PluginInstanceParent.h"
#include "nsDebug.h"

#define PWLOG(...)
// #define PWLOG(...) printf_stderr(__VA_ARGS__)

/* static */
already_AddRefed<nsIWidget>
nsIWidget::CreatePluginProxyWidget(TabChild* aTabChild,
                                   mozilla::plugins::PluginWidgetChild* aActor)
{
  nsCOMPtr<nsIWidget> widget =
    new mozilla::widget::PluginWidgetProxy(aTabChild, aActor);
  return widget.forget();
}

namespace mozilla {
namespace widget {

using mozilla::plugins::PluginInstanceParent;

NS_IMPL_ISUPPORTS_INHERITED(PluginWidgetProxy, PuppetWidget, nsIWidget)

#define ENSURE_CHANNEL do {                                   \
  if (!mActor) {                                              \
    NS_WARNING("called on an invalid channel.");              \
    return NS_ERROR_FAILURE;                                  \
  }                                                           \
} while (0)

PluginWidgetProxy::PluginWidgetProxy(dom::TabChild* aTabChild,
                                     mozilla::plugins::PluginWidgetChild* aActor) :
  PuppetWidget(aTabChild),
  mActor(aActor),
  mCachedPluginPort(0)
{
  // See ChannelDestroyed() in the header
  mActor->SetWidget(this);
}

PluginWidgetProxy::~PluginWidgetProxy()
{
  PWLOG("PluginWidgetProxy::~PluginWidgetProxy()\n");
}

nsresult
PluginWidgetProxy::Create(nsIWidget* aParent,
                          nsNativeWidget aNativeParent,
                          const LayoutDeviceIntRect& aRect,
                          nsWidgetInitData* aInitData)
{
  ENSURE_CHANNEL;
  PWLOG("PluginWidgetProxy::Create()\n");

  nsresult rv = NS_ERROR_UNEXPECTED;
  uint64_t scrollCaptureId;
  uintptr_t pluginInstanceId;
  mActor->SendCreate(&rv, &scrollCaptureId, &pluginInstanceId);
  if (NS_FAILED(rv)) {
    NS_WARNING("failed to create chrome widget, plugins won't paint.");
    return rv;
  }

  BaseCreate(aParent, aInitData);
  mParent = aParent;

  mBounds = aRect;
  mEnabled = true;
  mVisible = true;

  PluginInstanceParent* instance =
    PluginInstanceParent::LookupPluginInstanceByID(pluginInstanceId);
  if (instance) {
    Unused << NS_WARN_IF(NS_FAILED(instance->SetScrollCaptureId(scrollCaptureId)));
  }

  return NS_OK;
}

void
PluginWidgetProxy::SetParent(nsIWidget* aNewParent)
{
  nsCOMPtr<nsIWidget> kungFuDeathGrip(this);
  nsIWidget* parent = GetParent();
  if (parent) {
    parent->RemoveChild(this);
  }
  if (aNewParent) {
    aNewParent->AddChild(this);
  }
  mParent = aNewParent;
}

nsIWidget*
PluginWidgetProxy::GetParent(void)
{
  return mParent.get();
}

void
PluginWidgetProxy::Destroy()
{
  PWLOG("PluginWidgetProxy::Destroy()\n");

  if (mActor) {
    // Communicate that the layout widget has been torn down before the sub
    // protocol.
    mActor->ProxyShutdown();
    mActor = nullptr;
  }

  PuppetWidget::Destroy();
}

void
PluginWidgetProxy::GetWindowClipRegion(nsTArray<LayoutDeviceIntRect>* aRects)
{
  if (mClipRects && mClipRectCount) {
    aRects->AppendElements(mClipRects.get(), mClipRectCount);
  }
}

void*
PluginWidgetProxy::GetNativeData(uint32_t aDataType)
{
  if (!mActor) {
    return nullptr;
  }
  auto tab = static_cast<mozilla::dom::TabChild*>(mActor->Manager());
  if (tab && tab->IsDestroyed()) {
    return nullptr;
  }
  switch (aDataType) {
    case NS_NATIVE_PLUGIN_PORT:
    case NS_NATIVE_WINDOW:
    case NS_NATIVE_SHAREABLE_WINDOW:
      break;
    default:
      NS_WARNING("PluginWidgetProxy::GetNativeData received request for unsupported data type.");
      return nullptr;
  }
  // The parent side window handle or xid never changes so we can
  // cache this for our lifetime.
  if (mCachedPluginPort) {
    return (void*)mCachedPluginPort;
  }
  mActor->SendGetNativePluginPort(&mCachedPluginPort);
  PWLOG("PluginWidgetProxy::GetNativeData %p\n", (void*)mCachedPluginPort);
  return (void*)mCachedPluginPort;
}

void
PluginWidgetProxy::SetNativeData(uint32_t aDataType, uintptr_t aVal)
{
  if (!mActor) {
    return;
  }

  auto tab = static_cast<mozilla::dom::TabChild*>(mActor->Manager());
  if (tab && tab->IsDestroyed()) {
    return;
  }

  switch (aDataType) {
    case NS_NATIVE_CHILD_WINDOW:
      mActor->SendSetNativeChildWindow(aVal);
      break;
    default:
      NS_ERROR("SetNativeData called with unsupported data type.");
  }
}

nsresult
PluginWidgetProxy::SetFocus(bool aRaise)
{
  ENSURE_CHANNEL;
  PWLOG("PluginWidgetProxy::SetFocus(%d)\n", aRaise);
  mActor->SendSetFocus(aRaise);
  return NS_OK;
}

} // namespace widget
} // namespace mozilla