[orca] Detect and attempt to work around yet another Gecko text bug

[Joanmarie Diggs <joanied src gnome org>]

commit e70d5b6cde6f1e88339e266fb4e4f705c27220b5
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Jan 9 10:10:42 2017 -0500

    Detect and attempt to work around yet another Gecko text bug

 src/orca/scripts/web/script_utilities.py |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/src/orca/scripts/web/script_utilities.py b/src/orca/scripts/web/script_utilities.py
index eab223d..1b8db13 100644
--- a/src/orca/scripts/web/script_utilities.py
+++ b/src/orca/scripts/web/script_utilities.py
@@ -951,6 +951,15 @@ class Utilities(script_utilities.Utilities):
                   % (offset, obj, boundary, s1, start, end)
             debug.println(debug.LEVEL_INFO, msg, True)
             needSadHack = True
+        elif len(string) < end - start:
+            s1 = string.replace(self.EMBEDDED_OBJECT_CHARACTER, "[OBJ]").replace("\n", "\\n")
+            msg = "FAIL: Bad results for text at offset %i for %s using %s:\n" \
+                  "      String: '%s', Start: %i, End: %i.\n" \
+                  "      The bug is that the length of string is less than the text range.\n" \
+                  "      This very likely needs to be fixed by the toolkit." \
+                  % (offset, obj, boundary, s1, start, end)
+            debug.println(debug.LEVEL_INFO, msg, True)
+            needSadHack = True
 
         if needSadHack:
             sadString, sadStart, sadEnd = self.__findRange(text, offset, start, end, boundary)