C++ (Cpp) FrameMetrics::GetPaintRequestTime Examples

Example #1

File: APZCCallbackHelper.cpp Project: Natim/gecko-dev

void
APZCCallbackHelper::UpdateRootFrame(FrameMetrics& aMetrics)
{
  if (aMetrics.GetScrollId() == FrameMetrics::NULL_SCROLL_ID) {
    return;
  }
  nsIContent* content = nsLayoutUtils::FindContentFor(aMetrics.GetScrollId());
  if (!content) {
    return;
  }

  nsCOMPtr<nsIPresShell> shell = GetPresShell(content);
  if (!shell || aMetrics.GetPresShellId() != shell->GetPresShellId()) {
    return;
  }

  MOZ_ASSERT(aMetrics.GetUseDisplayPortMargins());

  if (gfxPrefs::APZAllowZooming()) {
    // If zooming is disabled then we don't really want to let APZ fiddle
    // with these things. In theory setting the resolution here should be a
    // no-op, but setting the SPCSPS is bad because it can cause a stale value
    // to be returned by window.innerWidth/innerHeight (see bug 1187792).

    float presShellResolution = shell->GetResolution();

    // If the pres shell resolution has changed on the content side side
    // the time this repaint request was fired, consider this request out of date
    // and drop it; setting a zoom based on the out-of-date resolution can have
    // the effect of getting us stuck with the stale resolution.
    if (presShellResolution != aMetrics.GetPresShellResolution()) {
      return;
    }

    // The pres shell resolution is updated by the the async zoom since the
    // last paint.
    presShellResolution = aMetrics.GetPresShellResolution()
                        * aMetrics.GetAsyncZoom().scale;
    shell->SetResolutionAndScaleTo(presShellResolution);
  }

  // Do this as late as possible since scrolling can flush layout. It also
  // adjusts the display port margins, so do it before we set those.
  ScrollFrame(content, aMetrics);

  MOZ_ASSERT(nsLayoutUtils::HasDisplayPort(content));
  SetDisplayPortMargins(shell, content, aMetrics);
  SetPaintRequestTime(content, aMetrics.GetPaintRequestTime());
}

Example #2

File: APZCCallbackHelper.cpp Project: Natim/gecko-dev

void
APZCCallbackHelper::UpdateSubFrame(FrameMetrics& aMetrics)
{
  if (aMetrics.GetScrollId() == FrameMetrics::NULL_SCROLL_ID) {
    return;
  }
  nsIContent* content = nsLayoutUtils::FindContentFor(aMetrics.GetScrollId());
  if (!content) {
    return;
  }

  MOZ_ASSERT(aMetrics.GetUseDisplayPortMargins());

  // We don't currently support zooming for subframes, so nothing extra
  // needs to be done beyond the tasks common to this and UpdateRootFrame.
  ScrollFrame(content, aMetrics);
  if (nsCOMPtr<nsIPresShell> shell = GetPresShell(content)) {
    SetDisplayPortMargins(shell, content, aMetrics);
  }
  SetPaintRequestTime(content, aMetrics.GetPaintRequestTime());
}