/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "GtkCompositorWidget.h"

#include "gfxPlatformGtk.h"
#include "mozilla/layers/CompositorThread.h"
#include "mozilla/widget/InProcessCompositorWidget.h"
#include "mozilla/widget/PlatformWidgetTypes.h"
#include "nsWindow.h"

namespace mozilla {
namespace widget {

GtkCompositorWidget::GtkCompositorWidget(const GtkCompositorWidgetInitData& aInitData,
                                         const layers::CompositorOptions& aOptions,
                                         nsWindow* aWindow)
      : CompositorWidget(aOptions)
      , mWidget(aWindow)
{
  // If we have a nsWindow, then grab the already existing display connection
  // If we don't, then use the init data to connect to the display
  if (aWindow) {
    mXDisplay = aWindow->XDisplay();
  } else {
    mXDisplay = XOpenDisplay(aInitData.XDisplayString().get());
  }

#ifdef MOZ_WAYLAND
  if (!mXDisplay) {
    MOZ_RELEASE_ASSERT(aWindow,
      "We're running on Wayland and but without valid nsWindow.");
    mProvider.Initialize(aWindow);
  } else
#endif
  {
    mXWindow = (Window)aInitData.XWindow();

    // Grab the window's visual and depth
    XWindowAttributes windowAttrs;
    if (!XGetWindowAttributes(mXDisplay, mXWindow, &windowAttrs)) {
      NS_WARNING("GtkCompositorWidget(): XGetWindowAttributes() failed!");
    }

    Visual*   visual = windowAttrs.visual;
    int       depth = windowAttrs.depth;

    // Initialize the window surface provider
    mProvider.Initialize(
      mXDisplay,
      mXWindow,
      visual,
      depth,
      aInitData.Shaped());
  }
  mClientSize = aInitData.InitialClientSize();
}

GtkCompositorWidget::~GtkCompositorWidget()
{
  mProvider.CleanupResources();

  // If we created our own display connection, we need to destroy it
  if (!mWidget && mXDisplay) {
    XCloseDisplay(mXDisplay);
    mXDisplay = nullptr;
  }
}

already_AddRefed<gfx::DrawTarget>
GtkCompositorWidget::StartRemoteDrawing()
{
  return nullptr;
}
void
GtkCompositorWidget::EndRemoteDrawing()
{
}

already_AddRefed<gfx::DrawTarget>
GtkCompositorWidget::StartRemoteDrawingInRegion(LayoutDeviceIntRegion& aInvalidRegion,
                                                layers::BufferMode* aBufferMode)
{
  return mProvider.StartRemoteDrawingInRegion(aInvalidRegion,
                                              aBufferMode);
}

void GtkCompositorWidget::EndRemoteDrawingInRegion(gfx::DrawTarget* aDrawTarget,
                              LayoutDeviceIntRegion& aInvalidRegion)
{
  mProvider.EndRemoteDrawingInRegion(aDrawTarget,
                                     aInvalidRegion);
}

nsIWidget* GtkCompositorWidget::RealWidget()
{
  return mWidget;
}

void
GtkCompositorWidget::NotifyClientSizeChanged(const LayoutDeviceIntSize& aClientSize)
{
  mClientSize = aClientSize;
}

LayoutDeviceIntSize
GtkCompositorWidget::GetClientSize()
{
  return mClientSize;
}

uintptr_t
GtkCompositorWidget::GetWidgetKey()
{
  return reinterpret_cast<uintptr_t>(mWidget);
}

} // namespace widget
} // namespace mozilla