[orca] Ignore text deletions from unrelated objects in web content

[Joanmarie Diggs <joanied src gnome org>]

commit efc1826719f4540e018c4a70c4c62453d98d68e1
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Jun 5 14:08:08 2019 -0400

    Ignore text deletions from unrelated objects in web content

 src/orca/scripts/web/script.py | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/orca/scripts/web/script.py b/src/orca/scripts/web/script.py
index 2eb23f3b9..47c71539f 100644
--- a/src/orca/scripts/web/script.py
+++ b/src/orca/scripts/web/script.py
@@ -1970,6 +1970,12 @@ class Script(default.Script):
             return True
 
         obj, offset = self.utilities.getCaretContext(getZombieReplicant=False)
+        if obj and obj != event.source \
+           and not pyatspi.findAncestor(obj, lambda x: x == event.source):
+            msg = "WEB: Ignoring event because it isn't %s or its ancestor" % obj
+            debug.println(debug.LEVEL_INFO, msg, True)
+            return True
+
         if self.utilities.isZombie(obj):
             if self.utilities.isLink(obj):
                 msg = "WEB: Focused link deleted. Taking no further action."