コード例 #1
0
void
AndroidGeckoLayerClient::SyncFrameMetrics(const ScreenPoint& aScrollOffset, float aZoom, const CSSRect& aCssPageRect,
                                          bool aLayersUpdated, const CSSRect& aDisplayPort, const CSSToLayerScale& aDisplayResolution,
                                          bool aIsFirstPaint, LayerMargin& aFixedLayerMargins, ScreenPoint& aOffset)
{
    NS_ASSERTION(!isNull(), "SyncFrameMetrics called on null layer client!");
    JNIEnv *env = GetJNIForThread();    // this is called on the compositor thread
    if (!env)
        return;

    AutoLocalJNIFrame jniFrame(env);

    // convert the displayport rect from scroll-relative CSS pixels to document-relative device pixels
    LayerRect dpUnrounded = aDisplayPort * aDisplayResolution;
    dpUnrounded += LayerPoint::FromUnknownPoint(aScrollOffset.ToUnknownPoint());
    LayerIntRect dp = gfx::RoundedToInt(dpUnrounded);

    jobject viewTransformJObj = env->CallObjectMethod(wrapped_obj, jSyncFrameMetricsMethod,
            aScrollOffset.x, aScrollOffset.y, aZoom,
            aCssPageRect.x, aCssPageRect.y, aCssPageRect.XMost(), aCssPageRect.YMost(),
            aLayersUpdated, dp.x, dp.y, dp.width, dp.height, aDisplayResolution.scale,
            aIsFirstPaint);

    if (jniFrame.CheckForException())
        return;

    NS_ABORT_IF_FALSE(viewTransformJObj, "No view transform object!");

    AndroidViewTransform viewTransform;
    viewTransform.Init(viewTransformJObj);
    viewTransform.GetFixedLayerMargins(env, aFixedLayerMargins);
    aOffset.x = viewTransform.GetOffsetX(env);
    aOffset.y = viewTransform.GetOffsetY(env);
}
コード例 #2
0
void
AndroidCompositorWidget::SyncFrameMetrics(const ParentLayerPoint& aScrollOffset,
                                          const CSSToParentLayerScale& aZoom,
                                          const CSSRect& aCssPageRect,
                                          const CSSRect& aDisplayPort,
                                          const CSSToLayerScale& aPaintedResolution,
                                          bool aLayersUpdated,
                                          int32_t aPaintSyncId,
                                          ScreenMargin& aFixedLayerMargins)
{
    auto layerClient = static_cast<nsWindow*>(RealWidget())->GetLayerClient();
    if (!layerClient) {
        return;
    }

    // convert the displayport rect from document-relative CSS pixels to
    // document-relative device pixels
    LayerIntRect dp = gfx::RoundedToInt(aDisplayPort * aPaintedResolution);

    java::ViewTransform::LocalRef viewTransform = layerClient->SyncFrameMetrics(
            aScrollOffset.x, aScrollOffset.y, aZoom.scale,
            aCssPageRect.x, aCssPageRect.y,
            aCssPageRect.XMost(), aCssPageRect.YMost(),
            dp.x, dp.y, dp.width, dp.height,
            aPaintedResolution.scale, aLayersUpdated, aPaintSyncId);

    MOZ_ASSERT(viewTransform, "No view transform object!");

    aFixedLayerMargins.top = viewTransform->FixedLayerMarginTop();
    aFixedLayerMargins.right = viewTransform->FixedLayerMarginRight();
    aFixedLayerMargins.bottom = viewTransform->FixedLayerMarginBottom();
    aFixedLayerMargins.left = viewTransform->FixedLayerMarginLeft();
}
コード例 #3
0
void
AndroidGeckoLayerClient::SetPageRect(const CSSRect& aCssPageRect)
{
    NS_ASSERTION(!isNull(), "SetPageRect called on null layer client!");
    JNIEnv *env = GetJNIForThread();    // this is called on the compositor thread
    if (!env)
        return;

    AutoLocalJNIFrame jniFrame(env, 0);
    return env->CallVoidMethod(wrapped_obj, jSetPageRect,
                               aCssPageRect.x, aCssPageRect.y, aCssPageRect.XMost(), aCssPageRect.YMost());
}
コード例 #4
0
void
AndroidGeckoLayerClient::SetFirstPaintViewport(const LayerIntPoint& aOffset, const CSSToLayerScale& aZoom, const CSSRect& aCssPageRect)
{
    NS_ASSERTION(!isNull(), "SetFirstPaintViewport called on null layer client!");
    JNIEnv *env = GetJNIForThread();    // this is called on the compositor thread
    if (!env)
        return;

    AutoLocalJNIFrame jniFrame(env, 0);
    return env->CallVoidMethod(wrapped_obj, jSetFirstPaintViewport, (float)aOffset.x, (float)aOffset.y, aZoom.scale,
                               aCssPageRect.x, aCssPageRect.y, aCssPageRect.XMost(), aCssPageRect.YMost());
}
コード例 #5
0
void
AndroidCompositorWidget::SetFirstPaintViewport(const LayerIntPoint& aOffset,
                                               const CSSToLayerScale& aZoom,
                                               const CSSRect& aCssPageRect)
{
    auto layerClient = static_cast<nsWindow*>(RealWidget())->GetLayerClient();
    if (!layerClient) {
        return;
    }

    layerClient->SetFirstPaintViewport(
            float(aOffset.x), float(aOffset.y), aZoom.scale, aCssPageRect.x,
            aCssPageRect.y, aCssPageRect.XMost(), aCssPageRect.YMost());
}
コード例 #6
0
CSSRect CalculateRectToZoomTo(const RefPtr<dom::Document>& aRootContentDocument,
                              const CSSPoint& aPoint) {
  // Ensure the layout information we get is up-to-date.
  aRootContentDocument->FlushPendingNotifications(FlushType::Layout);

  // An empty rect as return value is interpreted as "zoom out".
  const CSSRect zoomOut;

  nsCOMPtr<nsIPresShell> shell = aRootContentDocument->GetShell();
  if (!shell) {
    return zoomOut;
  }

  nsIScrollableFrame* rootScrollFrame = shell->GetRootScrollFrameAsScrollable();
  if (!rootScrollFrame) {
    return zoomOut;
  }

  nsCOMPtr<dom::Element> element = ElementFromPoint(shell, aPoint);
  if (!element) {
    return zoomOut;
  }

  while (element && !ShouldZoomToElement(element)) {
    element = element->GetParentElement();
  }

  if (!element) {
    return zoomOut;
  }

  FrameMetrics metrics =
      nsLayoutUtils::CalculateBasicFrameMetrics(rootScrollFrame);
  CSSRect compositedArea(
      CSSPoint::FromAppUnits(shell->GetVisualViewportOffset()),
      metrics.CalculateCompositedSizeInCssPixels());
  const CSSCoord margin = 15;
  CSSRect rect =
      nsLayoutUtils::GetBoundingContentRect(element, rootScrollFrame);

  // If the element is taller than the visible area of the page scale
  // the height of the |rect| so that it has the same aspect ratio as
  // the root frame.  The clipped |rect| is centered on the y value of
  // the touch point. This allows tall narrow elements to be zoomed.
  if (!rect.IsEmpty() && compositedArea.Width() > 0.0f) {
    const float widthRatio = rect.Width() / compositedArea.Width();
    float targetHeight = compositedArea.Height() * widthRatio;
    if (widthRatio < 0.9 && targetHeight < rect.Height()) {
      const CSSPoint scrollPoint =
          CSSPoint::FromAppUnits(rootScrollFrame->GetScrollPosition());
      float newY = aPoint.y + scrollPoint.y - (targetHeight * 0.5f);
      if ((newY + targetHeight) > rect.YMost()) {
        rect.MoveByY(rect.Height() - targetHeight);
      } else if (newY > rect.Y()) {
        rect.MoveToY(newY);
      }
      rect.SetHeight(targetHeight);
    }
  }

  rect = CSSRect(std::max(metrics.GetScrollableRect().X(), rect.X() - margin),
                 rect.Y(), rect.Width() + 2 * margin, rect.Height());
  // Constrict the rect to the screen's right edge
  rect.SetWidth(
      std::min(rect.Width(), metrics.GetScrollableRect().XMost() - rect.X()));

  // If the rect is already taking up most of the visible area and is
  // stretching the width of the page, then we want to zoom out instead.
  if (IsRectZoomedIn(rect, compositedArea)) {
    return zoomOut;
  }

  CSSRect rounded(rect);
  rounded.Round();

  // If the block we're zooming to is really tall, and the user double-tapped
  // more than a screenful of height from the top of it, then adjust the
  // y-coordinate so that we center the actual point the user double-tapped
  // upon. This prevents flying to the top of the page when double-tapping
  // to zoom in (bug 761721). The 1.2 multiplier is just a little fuzz to
  // compensate for 'rect' including horizontal margins but not vertical ones.
  CSSCoord cssTapY = metrics.GetScrollOffset().y + aPoint.y;
  if ((rect.Height() > rounded.Height()) &&
      (cssTapY > rounded.Y() + (rounded.Height() * 1.2))) {
    rounded.MoveToY(cssTapY - (rounded.Height() / 2));
  }

  return rounded;
}