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Switch to using WebRender hit testing
This trades quite a bit of complicated code in Servo for few more messages and a significant performance improvement. In particular, WebRender can search the entire display list at once instead of ping-ponging down the pipeline tree. This allows us to send mouse events to the correct pipeline immediately.
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20 changed files with 381 additions and 555 deletions
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@ -1149,28 +1149,15 @@ impl Window {
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x: f32,
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y: f32,
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scroll_root_id: ClipId,
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behavior: ScrollBehavior,
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element: Option<&Element>) {
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//TODO Step 1
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let point = Point2D::new(x, y);
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let smooth = match behavior {
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ScrollBehavior::Auto => {
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element.map_or(false, |_element| {
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// TODO check computed scroll-behaviour CSS property
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true
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})
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}
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ScrollBehavior::Instant => false,
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ScrollBehavior::Smooth => true
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};
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_behavior: ScrollBehavior,
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_element: Option<&Element>) {
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// TODO Step 1
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// TODO(mrobinson, #18709): Add smooth scrolling support to WebRender so that we can
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// properly process ScrollBehavior here.
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self.layout_chan.send(Msg::UpdateScrollStateFromScript(ScrollState {
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scroll_root_id: scroll_root_id,
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scroll_offset: Vector2D::new(-x, -y),
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})).unwrap();
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let message = ScriptMsg::ScrollFragmentPoint(scroll_root_id, point, smooth);
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self.send_to_constellation(message);
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}
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pub fn update_viewport_for_scroll(&self, x: f32, y: f32) {
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@ -1406,18 +1393,6 @@ impl Window {
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self.layout_rpc.node_geometry().client_rect
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}
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pub fn hit_test_query(&self,
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client_point: Point2D<f32>,
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update_cursor: bool)
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-> Option<UntrustedNodeAddress> {
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if !self.reflow(ReflowGoal::HitTestQuery(client_point, update_cursor),
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ReflowReason::Query) {
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return None
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}
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self.layout_rpc.hit_test().node_address
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}
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pub fn scroll_area_query(&self, node: TrustedNodeAddress) -> Rect<i32> {
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if !self.reflow(ReflowGoal::NodeScrollGeometryQuery(node), ReflowReason::Query) {
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return Rect::zero();
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@ -1910,8 +1885,7 @@ fn debug_reflow_events(id: PipelineId, reflow_goal: &ReflowGoal, reason: &Reflow
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ReflowGoal::Full => "\tFull",
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ReflowGoal::ContentBoxQuery(_n) => "\tContentBoxQuery",
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ReflowGoal::ContentBoxesQuery(_n) => "\tContentBoxesQuery",
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ReflowGoal::HitTestQuery(..) => "\tHitTestQuery",
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ReflowGoal::NodesFromPoint(..) => "\tNodesFromPoint",
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ReflowGoal::NodesFromPointQuery(..) => "\tNodesFromPointQuery",
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ReflowGoal::NodeGeometryQuery(_n) => "\tNodeGeometryQuery",
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ReflowGoal::NodeOverflowQuery(_n) => "\tNodeOverFlowQuery",
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ReflowGoal::NodeScrollGeometryQuery(_n) => "\tNodeScrollGeometryQuery",
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