[orca] Handle authoring which causes parent extents to not include children

[Joanmarie Diggs <joanied src gnome org>]

commit 130ee506b1448ae1cb6a017fe5388e675191d58c
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Nov 20 11:07:11 2019 -0500

    Handle authoring which causes parent extents to not include children

 src/orca/script_utilities.py             |  3 +++
 src/orca/scripts/web/script_utilities.py | 17 +++++++++++++++++
 2 files changed, 20 insertions(+)
---
diff --git a/src/orca/script_utilities.py b/src/orca/script_utilities.py
index 9d39bb96b..4fbc6e5bb 100644
--- a/src/orca/script_utilities.py
+++ b/src/orca/script_utilities.py
@@ -4096,6 +4096,9 @@ class Utilities:
         except:
             return False
 
+        if coordType is None:
+            coordType = pyatspi.DESKTOP_COORDS
+
         if component.contains(x, y, coordType):
             return True
 
diff --git a/src/orca/scripts/web/script_utilities.py b/src/orca/scripts/web/script_utilities.py
index 46ba0597e..d293f048b 100644
--- a/src/orca/scripts/web/script_utilities.py
+++ b/src/orca/scripts/web/script_utilities.py
@@ -4553,3 +4553,20 @@ class Utilities(script_utilities.Utilities):
             return True
 
         return False
+
+    def descendantAtPoint(self, root, x, y, coordType=None):
+        if not (root and self.inDocumentContent(root)):
+            return super().descendantAtPoint(root, x, y, coordType)
+
+        if self.containsPoint(root, x, y, coordType):
+            return super().descendantAtPoint(root, x, y, coordType)
+
+        # Authoring can cause user agents to expose containers with a bounding
+        # box that doesn't contain the child container at the specified point.
+        obj = root
+        for child in root:
+            if self.containsPoint(child, x, y, coordType):
+                obj = child
+                break
+
+        return super().descendantAtPoint(obj, x, y, coordType)