Adds an interface to SurfaceHittestDelegate in order to override

the hittesting decision to accept a surface.

This will be used to override hittesting on transparent backgrounds.

BUG=491334
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1663433002

Cr-Commit-Position: refs/heads/master@{#374433}

2 files changed, 39 insertions, 11 deletions

diff --git a/cc/test/surface_hittest_test_helpers.cc b/cc/test/surface_hittest_test_helpers.cc
index b83d6d4..5766273 100644
--- a/cc/test/surface_hittest_test_helpers.cc
+++ b/cc/test/surface_hittest_test_helpers.cc
@@ -93,27 +93,48 @@ scoped_ptr<CompositorFrame> CreateCompositorFrame(const gfx::Rect& root_rect,
 }
 
 TestSurfaceHittestDelegate::TestSurfaceHittestDelegate()
-    : target_overrides_(0) {}
+    : reject_target_overrides_(0), accept_target_overrides_(0) {}
 
 TestSurfaceHittestDelegate::~TestSurfaceHittestDelegate() {}
 
-void TestSurfaceHittestDelegate::AddInsetsForSurface(
+void TestSurfaceHittestDelegate::AddInsetsForRejectSurface(
     const SurfaceId& surface_id,
     const gfx::Insets& inset) {
-  insets_for_surface_.insert(std::make_pair(surface_id, inset));
+  insets_for_reject_.insert(std::make_pair(surface_id, inset));
+}
+
+void TestSurfaceHittestDelegate::AddInsetsForAcceptSurface(
+    const SurfaceId& surface_id,
+    const gfx::Insets& inset) {
+  insets_for_accept_.insert(std::make_pair(surface_id, inset));
 }
 
 bool TestSurfaceHittestDelegate::RejectHitTarget(
     const SurfaceDrawQuad* surface_quad,
     const gfx::Point& point_in_quad_space) {
-  if (!insets_for_surface_.count(surface_quad->surface_id))
+  if (!insets_for_reject_.count(surface_quad->surface_id))
     return false;
   gfx::Rect bounds(surface_quad->rect);
-  bounds.Inset(insets_for_surface_[surface_quad->surface_id]);
+  bounds.Inset(insets_for_reject_[surface_quad->surface_id]);
   // If the point provided falls outside the inset, then we skip this surface.
   if (!bounds.Contains(point_in_quad_space)) {
     if (surface_quad->rect.Contains(point_in_quad_space))
-      ++target_overrides_;
+      ++reject_target_overrides_;
+    return true;
+  }
+  return false;
+}
+
+bool TestSurfaceHittestDelegate::AcceptHitTarget(
+    const SurfaceDrawQuad* surface_quad,
+    const gfx::Point& point_in_quad_space) {
+  if (!insets_for_accept_.count(surface_quad->surface_id))
+    return false;
+  gfx::Rect bounds(surface_quad->rect);
+  bounds.Inset(insets_for_accept_[surface_quad->surface_id]);
+  // If the point provided falls outside the inset, then we accept this surface.
+  if (!bounds.Contains(point_in_quad_space)) {
+    ++accept_target_overrides_;
     return true;
   }
   return false;
diff --git a/cc/test/surface_hittest_test_helpers.h b/cc/test/surface_hittest_test_helpers.h
index 4a27659..e3f8ff9 100644
--- a/cc/test/surface_hittest_test_helpers.h
+++ b/cc/test/surface_hittest_test_helpers.h
@@ -70,18 +70,25 @@ class TestSurfaceHittestDelegate : public SurfaceHittestDelegate {
   TestSurfaceHittestDelegate();
   ~TestSurfaceHittestDelegate();
 
-  int target_overrides() const { return target_overrides_; }
+  int reject_target_overrides() const { return reject_target_overrides_; }
+  int accept_target_overrides() const { return accept_target_overrides_; }
 
-  void AddInsetsForSurface(const SurfaceId& surface_id,
-                           const gfx::Insets& inset);
+  void AddInsetsForRejectSurface(const SurfaceId& surface_id,
+                                 const gfx::Insets& inset);
+  void AddInsetsForAcceptSurface(const SurfaceId& surface_id,
+                                 const gfx::Insets& inset);
 
   // SurfaceHittestDelegate implementation.
   bool RejectHitTarget(const SurfaceDrawQuad* surface_quad,
                        const gfx::Point& point_in_quad_space) override;
+  bool AcceptHitTarget(const SurfaceDrawQuad* surface_quad,
+                       const gfx::Point& point_in_quad_space) override;
 
  private:
-  int target_overrides_;
-  std::map<SurfaceId, gfx::Insets> insets_for_surface_;
+  int reject_target_overrides_;
+  int accept_target_overrides_;
+  std::map<SurfaceId, gfx::Insets> insets_for_reject_;
+  std::map<SurfaceId, gfx::Insets> insets_for_accept_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSurfaceHittestDelegate);
 };