Create new ZopeUndo package.

src/ZopeUndo/Prefix.py

+##############################################################################
+#
+# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE
+#
+##############################################################################
+"""ZODB undo support for Zope.
+
+This package is used to support the Prefix object that Zope uses for
+undo.  It is a separate package only to aid configuration management.
+This package is included in Zope and ZODB3, so that ZODB3 is suitable
+for running a ZEO server that handles Zope undo.
+"""
+
+class Prefix:
+    """A Prefix() is equal to any string it as a prefix of.
+
+    This class can be compared to a string (or arbitrary sequence).
+    The comparison will return True if the prefix value is a prefix of
+    the string being compared.
+
+    Two prefixes can not be compared.
+    """
+
+    __no_side_effects__ = 1
+
+    def __init__(self, path):
+        self.value = len(path), path
+
+    def __cmp__(self, o):
+        l, v = self.value
+        rval = cmp(o[:l], v)
+        return rval

src/ZopeUndo/__init__.py

+##############################################################################
+#
+# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE
+#
+##############################################################################

src/ZopeUndo/tests/__init__.py

+##############################################################################
+#
+# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE
+#
+##############################################################################

src/ZopeUndo/tests/testPrefix.py

+##############################################################################
+#
+# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE
+#
+##############################################################################
+from ZopeUndo.Prefix import Prefix
+
+import unittest
+
+class PrefixTest(unittest.TestCase):
+
+    def test(self):
+        p1 = (Prefix("/a/b"),
+              ("/a/b", "/a/b/c", "/a/b/c/d"),
+              ("", "/a/c"))
+
+        p2 = (Prefix(""),
+              ("", "/def", "/a/b", "/a/b/c", "/a/b/c/d"),
+              ())
+
+        for prefix, equal, notequal in p1, p2:
+            for s in equal:
+                self.assertEqual(prefix, s)
+            for s in notequal:
+                self.assertNotEqual(prefix, s)
+
+def test_suite():
+    return unittest.makeSuite(PrefixTest)