[VizHitTesting] Propagate pointer-events:none to RemoteFrame

When a remote frame has an local ancestor with pointer-events: none, the
frame and all its descendants should be excluded in hit testing.

See https://docs.google.com/document/d/1xN1bRigzahOgUM4cEuyHGhe069TRc5-0rXz1JZsgCP8/edit?usp=sharing

Bug: 1002245
Change-Id: I9e2f86b1d1e6727a66499639994d269d301f1a34
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1836954Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Robert Flack <flackr@chromium.org>
Commit-Queue: Yi Gu <yigu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705125}

content/browser/site_per_process_hit_test_browsertest.cc

@@ -2810,6 +2810,73 @@ IN_PROC_BROWSER_TEST_P(SitePerProcessHitTestBrowserTest,
               kHitTestTolerance);
 }
 
+IN_PROC_BROWSER_TEST_P(SitePerProcessHitTestBrowserTest,
+                       PointerEventsNoneWithNestedSameOriginIFrame) {
+  GURL main_url(embedded_test_server()->GetURL(
+      "/frame_tree/page_with_same_origin_nested_frames.html"));
+  EXPECT_TRUE(NavigateToURL(shell(), main_url));
+
+  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
+                            ->GetFrameTree()
+                            ->root();
+  ASSERT_EQ(1U, root->child_count());
+  RenderWidgetHostViewBase* root_view = static_cast<RenderWidgetHostViewBase*>(
+      root->current_frame_host()->GetRenderWidgetHost()->GetView());
+
+  EXPECT_EQ(
+      " Site A ------------ proxies for B\n"
+      "   +--Site A ------- proxies for B\n"
+      "        +--Site B -- proxies for A\n"
+      "Where A = http://127.0.0.1/\n"
+      "      B = http://baz.com/",
+      DepictFrameTree(root));
+
+  FrameTreeNode* child_node = root->child_at(0);
+  FrameTreeNode* grandchild_node = child_node->child_at(0);
+
+  // This is to make sure that the hit_test_data is clean before running the
+  // hit_test_data_change_observer.
+  WaitForHitTestData(child_node->current_frame_host());
+  WaitForHitTestData(grandchild_node->current_frame_host());
+
+  HitTestRegionObserver hit_test_data_change_observer(
+      root_view->GetRootFrameSinkId());
+  hit_test_data_change_observer.WaitForHitTestData();
+
+  EXPECT_TRUE(ExecuteScript(web_contents(),
+                            "document.getElementById('wrapper').style."
+                            "pointerEvents = 'none';"));
+
+  hit_test_data_change_observer.WaitForHitTestDataChange();
+
+  MainThreadFrameObserver observer(
+      root->current_frame_host()->GetRenderWidgetHost());
+  observer.Wait();
+
+  // ------------------------
+  // root    50px
+  //     ---------------------
+  //     |child  50px        |
+  // 50px|    -------------- |
+  //     |50px| grand_child ||
+  //     |    |             ||
+  //     |    |-------------||
+  //     ---------------------
+
+  // DispatchMouseEventAndWaitUntilDispatch will make sure the mouse event goes
+  // to the right frame. Create a listener for the grandchild to verify that it
+  // does not receive the event. No need to create one for the child because
+  // root and child are on the same process.
+  RenderWidgetHostMouseEventMonitor grandchild_frame_monitor(
+      grandchild_node->current_frame_host()->GetRenderWidgetHost());
+
+  // Since child has pointer-events: none, (125, 125) should be claimed by root.
+  DispatchMouseEventAndWaitUntilDispatch(web_contents(), root_view,
+                                         gfx::PointF(125, 125), root_view,
+                                         gfx::PointF(125, 125));
+  EXPECT_FALSE(grandchild_frame_monitor.EventWasReceived());
+}
+
 IN_PROC_BROWSER_TEST_P(SitePerProcessHitTestBrowserTest,
                        PointerEventsNoneWithNestedOOPIF) {
   GURL main_url(embedded_test_server()->GetURL(
@@ -2854,12 +2921,6 @@ IN_PROC_BROWSER_TEST_P(SitePerProcessHitTestBrowserTest,
       root->current_frame_host()->GetRenderWidgetHost());
   observer.Wait();
 
-  // Create listeners for mouse events.
-  RenderWidgetHostMouseEventMonitor main_frame_monitor(
-      root->current_frame_host()->GetRenderWidgetHost());
-  RenderWidgetHostMouseEventMonitor child_frame_monitor(
-      child_node->current_frame_host()->GetRenderWidgetHost());
-
   // ------------------------
   // root    50px
   //     ---------------------
@@ -2869,30 +2930,17 @@ IN_PROC_BROWSER_TEST_P(SitePerProcessHitTestBrowserTest,
   //     |    |             ||
   //     |    |-------------||
   //     ---------------------
-  //
-  // Since child has pointer-events: none, (125, 125) should be claimed by root.
-  blink::WebMouseEvent mouse_event(
-      blink::WebInputEvent::kMouseDown, blink::WebInputEvent::kNoModifiers,
-      blink::WebInputEvent::GetStaticTimeStampForTests());
-  mouse_event.button = blink::WebPointerProperties::Button::kLeft;
-  SetWebEventPositions(&mouse_event, gfx::Point(125, 125), root_view);
-  mouse_event.click_count = 1;
 
-  main_frame_monitor.ResetEventReceived();
-  child_frame_monitor.ResetEventReceived();
-
-  InputEventAckWaiter waiter(root->current_frame_host()->GetRenderWidgetHost(),
-                             blink::WebInputEvent::kMouseDown);
-  RenderWidgetHostInputEventRouter* router =
-      web_contents()->GetInputEventRouter();
-  router->RouteMouseEvent(root_view, &mouse_event, ui::LatencyInfo());
-  waiter.Wait();
+  // DispatchMouseEventAndWaitUntilDispatch will make sure the mouse event goes
+  // to the right frame. Create a listener for the child to verify that it does
+  // not receive the event.
+  RenderWidgetHostMouseEventMonitor child_frame_monitor(
+      child_node->current_frame_host()->GetRenderWidgetHost());
 
-  EXPECT_TRUE(main_frame_monitor.EventWasReceived());
-  EXPECT_NEAR(125, main_frame_monitor.event().PositionInWidget().x,
-              kHitTestTolerance);
-  EXPECT_NEAR(125, main_frame_monitor.event().PositionInWidget().y,
-              kHitTestTolerance);
+  // Since child has pointer-events: none, (125, 125) should be claimed by root.
+  DispatchMouseEventAndWaitUntilDispatch(web_contents(), root_view,
+                                         gfx::PointF(125, 125), root_view,
+                                         gfx::PointF(125, 125));
   EXPECT_FALSE(child_frame_monitor.EventWasReceived());
 }
 

content/test/data/frame_tree/page_with_same_origin_nested_frames.html

+<!DOCTYPE html>
+<style>
+iframe {
+  top: 50px;
+  left: 50px;
+  width: 200px;
+  height: 200px;
+}
+</style>
+<html>
+<body>
+<div id="wrapper">
+  <iframe src="page_with_positioned_frame.html"></iframe>
+</div>
+</body>
+</html>

third_party/blink/renderer/core/frame/frame.cc

@@ -261,6 +261,27 @@ void Frame::UpdateInheritedEffectiveTouchActionIfPossible() {
   }
 }
 
+void Frame::UpdateVisibleToHitTesting() {
+  bool parent_visible_to_hit_testing = true;
+  if (auto* parent = Tree().Parent())
+    parent_visible_to_hit_testing = parent->GetVisibleToHitTesting();
+
+  bool self_visible_to_hit_testing = true;
+  if (auto* local_owner = DynamicTo<HTMLFrameOwnerElement>(owner_.Get())) {
+    self_visible_to_hit_testing =
+        local_owner->GetLayoutObject()
+            ? local_owner->GetLayoutObject()->Style()->VisibleToHitTesting()
+            : true;
+  }
+
+  bool visible_to_hit_testing =
+      parent_visible_to_hit_testing && self_visible_to_hit_testing;
+  bool changed = visible_to_hit_testing_ != visible_to_hit_testing;
+  visible_to_hit_testing_ = visible_to_hit_testing;
+  if (changed)
+    DidChangeVisibleToHitTesting();
+}
+
 const std::string& Frame::ToTraceValue() {
   // token's ToString() is latin1.
   if (!trace_value_)

third_party/blink/renderer/core/frame/frame.h

@@ -234,6 +234,9 @@ class CORE_EXPORT Frame : public GarbageCollected<Frame> {
     return *window_agent_factory_;
   }
 
+  bool GetVisibleToHitTesting() const { return visible_to_hit_testing_; }
+  void UpdateVisibleToHitTesting();
+
  protected:
   // |inheriting_agent_factory| should basically be set to the parent frame or
   // opener's WindowAgentFactory. Pass nullptr if the frame is isolated from
@@ -260,6 +263,8 @@ class CORE_EXPORT Frame : public GarbageCollected<Frame> {
     return lifecycle_.GetState() == FrameLifecycle::kDetached;
   }
 
+  virtual void DidChangeVisibleToHitTesting() = 0;
+
   mutable FrameTree tree_node_;
 
   Member<Page> page_;
@@ -279,6 +284,8 @@ class CORE_EXPORT Frame : public GarbageCollected<Frame> {
 
   TouchAction inherited_effective_touch_action_ = TouchAction::kTouchActionAuto;
 
+  bool visible_to_hit_testing_ = true;
+
  private:
   Member<FrameClient> client_;
   const Member<WindowProxyManager> window_proxy_manager_;

third_party/blink/renderer/core/frame/local_frame.cc

@@ -1787,4 +1787,13 @@ void LocalFrame::EvictFromBackForwardCache() {
   Client()->EvictFromBackForwardCache();
 }
 
+void LocalFrame::DidChangeVisibleToHitTesting() {
+  // LayoutEmbeddedContent does not propagate style updates to descendants.
+  // Need to update the field manually.
+  for (Frame* child = Tree().FirstChild(); child;
+       child = child->Tree().NextSibling()) {
+    child->UpdateVisibleToHitTesting();
+  }
+}
+
 }  // namespace blink

third_party/blink/renderer/core/frame/local_frame.h

@@ -447,6 +447,8 @@ class CORE_EXPORT LocalFrame final : public Frame,
   void SetIsCapturingMediaCallback(IsCapturingMediaCallback callback);
   bool IsCapturingMedia() const;
 
+  void DidChangeVisibleToHitTesting() override;
+
  private:
   friend class FrameNavigationDisabler;
 

third_party/blink/renderer/core/frame/remote_frame.cc

@@ -46,6 +46,7 @@ RemoteFrame::RemoteFrame(RemoteFrameClient* client,
   dom_window_ = MakeGarbageCollected<RemoteDOMWindow>(*this);
   UpdateInertIfPossible();
   UpdateInheritedEffectiveTouchActionIfPossible();
+  UpdateVisibleToHitTesting();
 
   Initialize();
 }
@@ -214,7 +215,7 @@ RemoteFrameClient* RemoteFrame::Client() const {
   return static_cast<RemoteFrameClient*>(Frame::Client());
 }
 
-void RemoteFrame::PointerEventsChanged() {
+void RemoteFrame::DidChangeVisibleToHitTesting() {
   if (!cc_layer_ || !is_surface_layer_)
     return;
 
@@ -226,9 +227,9 @@ bool RemoteFrame::IsIgnoredForHitTest() const {
   HTMLFrameOwnerElement* owner = DeprecatedLocalOwner();
   if (!owner || !owner->GetLayoutObject())
     return false;
+
   return owner->OwnerType() == FrameOwnerElementType::kPortal ||
-         (owner->GetLayoutObject()->Style()->PointerEvents() ==
-          EPointerEvents::kNone);
+         !visible_to_hit_testing_;
 }
 
 void RemoteFrame::SetCcLayer(cc::Layer* cc_layer,
@@ -243,7 +244,10 @@ void RemoteFrame::SetCcLayer(cc::Layer* cc_layer,
   is_surface_layer_ = is_surface_layer;
   if (cc_layer_) {
     GraphicsLayer::RegisterContentsLayer(cc_layer_);
-    PointerEventsChanged();
+    if (is_surface_layer) {
+      static_cast<cc::SurfaceLayer*>(cc_layer_)->SetHasPointerEventsNone(
+          IsIgnoredForHitTest());
+    }
   }
 
   To<HTMLFrameOwnerElement>(Owner())->SetNeedsCompositingUpdate();

third_party/blink/renderer/core/frame/remote_frame.h

@@ -64,9 +64,10 @@ class CORE_EXPORT RemoteFrame final : public Frame {
 
   RemoteFrameClient* Client() const;
 
-  void PointerEventsChanged();
   bool IsIgnoredForHitTest() const;
 
+  void DidChangeVisibleToHitTesting() override;
+
  private:
   // Frame protected overrides:
   void DetachImpl(FrameDetachType) override;

third_party/blink/renderer/core/html/html_frame_owner_element.cc

@@ -308,11 +308,6 @@ void HTMLFrameOwnerElement::UpdateContainerPolicy(Vector<String>* messages) {
   }
 }
 
-void HTMLFrameOwnerElement::PointerEventsChanged() {
-  if (auto* remote_frame = DynamicTo<RemoteFrame>(ContentFrame()))
-    remote_frame->PointerEventsChanged();
-}
-
 void HTMLFrameOwnerElement::FrameOwnerPropertiesChanged() {
   // Don't notify about updates if ContentFrame() is null, for example when
   // the subframe hasn't been created yet; or if we are in the middle of

third_party/blink/renderer/core/html/html_frame_owner_element.h

@@ -119,10 +119,6 @@ class CORE_EXPORT HTMLFrameOwnerElement : public HTMLElement,
   // For unit tests, manually trigger the UpdateContainerPolicy method.
   void UpdateContainerPolicyForTests() { UpdateContainerPolicy(); }
 
-  // This function is to notify ChildFrameCompositor of pointer-events changes
-  // of an OOPIF.
-  void PointerEventsChanged();
-
   void CancelPendingLazyLoad();
 
   void ParseAttribute(const AttributeModificationParams&) override;

third_party/blink/renderer/core/layout/layout_embedded_content.cc

@@ -29,6 +29,7 @@
 #include "third_party/blink/renderer/core/frame/embedded_content_view.h"
 #include "third_party/blink/renderer/core/frame/local_frame.h"
 #include "third_party/blink/renderer/core/frame/local_frame_view.h"
+#include "third_party/blink/renderer/core/frame/remote_frame.h"
 #include "third_party/blink/renderer/core/frame/remote_frame_view.h"
 #include "third_party/blink/renderer/core/html/html_frame_element_base.h"
 #include "third_party/blink/renderer/core/html/html_plugin_element.h"
@@ -254,20 +255,28 @@ void LayoutEmbeddedContent::StyleDidChange(StyleDifference diff,
                                            const ComputedStyle* old_style) {
   LayoutReplaced::StyleDidChange(diff, old_style);
 
-  if (!old_style || Style()->PointerEvents() != old_style->PointerEvents()) {
-    if (auto* frame_owner = DynamicTo<HTMLFrameOwnerElement>(GetNode()))
-      frame_owner->PointerEventsChanged();
-  }
-
-  EmbeddedContentView* embedded_content_view = GetEmbeddedContentView();
-  if (!embedded_content_view)
-    return;
-
+  if (EmbeddedContentView* embedded_content_view = GetEmbeddedContentView()) {
     if (StyleRef().Visibility() != EVisibility::kVisible) {
       embedded_content_view->Hide();
     } else {
       embedded_content_view->Show();
     }
+  }
+
+  if (old_style &&
+      StyleRef().VisibleToHitTesting() == old_style->VisibleToHitTesting()) {
+    return;
+  }
+
+  auto* frame_owner = DynamicTo<HTMLFrameOwnerElement>(GetNode());
+  if (!frame_owner)
+    return;
+
+  auto* frame = frame_owner->ContentFrame();
+  if (!frame)
+    return;
+
+  frame->UpdateVisibleToHitTesting();
 }
 
 void LayoutEmbeddedContent::UpdateLayout() {

third_party/blink/tools/blinkpy/presubmit/audit_non_blink_usage.py

@@ -250,6 +250,7 @@ _CONFIG = [
             # cc::Layers.
             'cc::Layer',
             'cc::PictureLayer',
+            'cc::SurfaceLayer',
 
             # cc::Layer helper data structs.
             'cc::ElementId',