[orca/gnome-2-26] Fix for bgo#586890 - Orca 2.27.3 and earlier will crash if liblouis 1.6.2 python bindings are instal

[William Walker <wwalker src gnome org>]

commit 9765fd9ea77daaf785b15f2f57ed2497fe79975a
Author: Willie Walker <william walker sun com>
Date:   Wed Jun 24 20:02:39 2009 -0400

    Fix for bgo#586890 - Orca 2.27.3 and earlier will crash if liblouis 1.6.2 python bindings are installed

 src/orca/braille.py |   27 +++++++++++++++++++--------
 1 files changed, 19 insertions(+), 8 deletions(-)
---
diff --git a/src/orca/braille.py b/src/orca/braille.py
index 122cf9b..b518da8 100644
--- a/src/orca/braille.py
+++ b/src/orca/braille.py
@@ -36,14 +36,6 @@ log = logging.getLogger("braille")
 
 import signal
 
-try:
-    import louis
-except ImportError:
-    louis = None
-    _defaultContractionTable = None
-else:
-    _defaultContractionTable = louis.getDefaultTable()
-
 # We'll use the official BrlAPI pythons (as of BrlTTY 3.8) if they
 # are available.  Otherwise, we'll fall back to our own bindings.
 #
@@ -74,6 +66,25 @@ import eventsynthesizer
 import orca_state
 import settings
 
+try:
+    import louis
+    _defaultContractionTable = louis.getDefaultTable()
+except:
+    louis = None
+    _defaultContractionTable = None
+
+if louis:
+    version = louis.version()
+    [major, minor, point] = louis.version().split(".", 2)
+    major = int(major)
+    minor = int(minor)
+    if (major > 1) or (major == 1 and minor > 5):
+        debug.println(debug.LEVEL_SEVERE,
+            "You have liblouis %s installed.  "\
+            "liblouis 1.5.2 or earlier is needed." % version)
+        louis = None
+        _defaultContractionTable = None
+
 from orca_i18n import _                          # for gettext support
 
 # If True, this module has been initialized.