[orca] Work around Thunderbird not exposing STATE_EDITABLE on all editable objects

[Joanmarie Diggs <joanied src gnome org>]

commit 428b9a5ea2720acc1073a70706a72a965ca6196d
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Sat Dec 2 13:30:05 2017 -0500

    Work around Thunderbird not exposing STATE_EDITABLE on all editable objects

 src/orca/scripts/web/script.py           |    3 +--
 src/orca/scripts/web/script_utilities.py |    9 ++++++++-
 2 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/src/orca/scripts/web/script.py b/src/orca/scripts/web/script.py
index 3f032ff..df536aa 100644
--- a/src/orca/scripts/web/script.py
+++ b/src/orca/scripts/web/script.py
@@ -1879,8 +1879,7 @@ class Script(default.Script):
             debug.println(debug.LEVEL_INFO, msg, True)
             self.structuralNavigation.clearCache(document)
 
-        state = event.source.getState()
-        if not state.contains(pyatspi.STATE_EDITABLE):
+        if not self.utilities.isContentEditableWithEmbeddedObjects(event.source):
             if self._inMouseOverObject \
                and self.utilities.isZombie(self._lastMouseOverObject):
                 msg = "WEB: Restoring pre-mouseover context"
diff --git a/src/orca/scripts/web/script_utilities.py b/src/orca/scripts/web/script_utilities.py
index 81123e7..516977c 100644
--- a/src/orca/scripts/web/script_utilities.py
+++ b/src/orca/scripts/web/script_utilities.py
@@ -1615,6 +1615,9 @@ class Utilities(script_utilities.Utilities):
            or self.isToolBarDescendant(obj):
             return True
 
+        if self.isContentEditableWithEmbeddedObjects(obj):
+            return True
+
         return False
 
     def _textBlockElementRoles(self):
@@ -3141,8 +3144,12 @@ class Utilities(script_utilities.Utilities):
             debug.println(debug.LEVEL_INFO, msg, True)
             return rv
 
+        isTextBlockRole = role in self._textBlockElementRoles() or self.isLink(obj)
         if state.contains(pyatspi.STATE_EDITABLE):
-            rv = role in self._textBlockElementRoles() or self.isLink(obj)
+            rv = isTextBlockRole
+        elif not self.isDocument(obj):
+            document = self.getDocumentForObject(obj)
+            rv = self.isContentEditableWithEmbeddedObjects(document)
 
         self._isContentEditableWithEmbeddedObjects[hash(obj)] = rv
         return rv