[orca] Sanity check to prevent hang in WebKitGtk content.

[Joanmarie Diggs <joanied src gnome org>]

commit f1996e8f0ef0bd921e9adec27b6df769039169bc
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Dec 11 17:10:55 2013 +0100

    Sanity check to prevent hang in WebKitGtk content.

 src/orca/scripts/toolkits/WebKitGtk/script.py |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/scripts/toolkits/WebKitGtk/script.py b/src/orca/scripts/toolkits/WebKitGtk/script.py
index e3aac70..801c242 100644
--- a/src/orca/scripts/toolkits/WebKitGtk/script.py
+++ b/src/orca/scripts/toolkits/WebKitGtk/script.py
@@ -549,10 +549,16 @@ class Script(default.Script):
             string = self.utilities.adjustForRepeats(string)
             voice = self.speechGenerator.getVoiceForString(obj, string)
             string = self.utilities.adjustForLinks(obj, string, start)
+            # Incrementing the offset should cause us to eventually reach
+            # the end of the text as indicated by a 0-length string and
+            # start and end offsets of 0. Sometimes WebKitGtk returns the
+            # final text segment instead.
+            if segments and [string, start, end, voice] == segments[-1]:
+                break
+
             segments.append([string, start, end, voice])
             offset = end + 1
             string, start, end = text.getTextAtOffset(offset, boundary)
-
         return segments
 
     def textLines(self, obj):