[orca] Try to avoid crashing Nautilus

[Joanmarie Diggs <joanied src gnome org>]

commit ef42f11779484883151a8fc8ac75d170fe0db273
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Apr 22 13:28:48 2020 -0400

    Try to avoid crashing Nautilus
    
    The docs for atk_text_get_text() says callers can use -1 as the value
    for end_offset. Turns out this causes Nautilus's icon view to segfault.
    So for now, don't do what we should be able to do.

 src/orca/script_utilities.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/src/orca/script_utilities.py b/src/orca/script_utilities.py
index e15a772bc..9eea10f7e 100644
--- a/src/orca/script_utilities.py
+++ b/src/orca/script_utilities.py
@@ -547,7 +547,9 @@ class Utilities:
             return name
 
         if 'Text' in pyatspi.listInterfaces(obj):
-            displayedText = obj.queryText().getText(0, -1)
+            # We should be able to use -1 for the final offset, but that crashes Nautilus.
+            text = obj.queryText()
+            displayedText = text.getText(0, text.characterCount)
             if self.EMBEDDED_OBJECT_CHARACTER in displayedText:
                 displayedText = None