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);
}
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();
}
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());
}
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());
}
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());
}
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;
}
