From d200718f045beba8180af84f56b9d85ec3d3db5c Mon Sep 17 00:00:00 2001
From: Marius Gedminas <marius@gedmin.as>
Date: Thu, 21 Oct 2004 11:45:01 +0000
Subject: Indicate dynamic message IDs by replacing dynamic parts with XXX
 instead of removing them.  See the newly-added unit test for examples.  See
 also <http://zope.org/Collectors/Zope3-dev/300>.

---
 talgettext.py            |  7 +++++--
 tests/test_talgettext.py | 30 ++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/talgettext.py b/talgettext.py
index 036bc19..3e6d2b6 100644
--- a/talgettext.py
+++ b/talgettext.py
@@ -94,10 +94,13 @@ class POEngine(DummyEngine):
         DummyEngine.__init__(self, macros)
 
     def evaluate(*args):
-        return '' # who cares
+        # If the result of evaluate ever gets into a message ID, we want
+        # to notice the fact in the .pot file.
+        return 'XXX'
 
     def evaluatePathOrVar(*args):
-        return '' # who cares
+        # Actually this method is never called.
+        return 'XXX'
 
     def evaluateSequence(self, expr):
         return (0,) # dummy
diff --git a/tests/test_talgettext.py b/tests/test_talgettext.py
index 56d6858..1d31435 100644
--- a/tests/test_talgettext.py
+++ b/tests/test_talgettext.py
@@ -18,7 +18,11 @@ $Id$
 """
 import sys
 import unittest
+import operator
+from StringIO import StringIO
 
+from zope.tal.htmltalparser import HTMLTALParser
+from zope.tal.talgettext import POTALInterpreter
 from zope.tal.talgettext import POEngine
 from zope.tal.tests import utils
 
@@ -40,6 +44,32 @@ class test_POEngine(unittest.TestCase):
                         "POEngine catalog does not properly store message ids"
                         )
 
+    def test_dynamic_msgids(self):
+        sample_source = """
+            <p i18n:translate="">
+              Some
+              <span tal:replace="string:strange">dynamic</span>
+              text.
+            </p>
+            <p i18n:translate="">
+              A <a tal:attributes="href path:dynamic">link</a>.
+            </p>
+        """
+        p = HTMLTALParser()
+        p.parseString(sample_source)
+        program, macros = p.getCode()
+        engine = POEngine()
+        engine.file = 'sample_source'
+        POTALInterpreter(program, macros, engine, stream=StringIO(),
+                         metal=False)()
+        msgids = []
+        for domain in engine.catalog.values():
+            msgids += domain.keys()
+        msgids.sort()
+        self.assertEquals(msgids,
+                          ['A <a href="XXX">link</a>.', 'Some XXX text.'])
+
+
 def test_suite():
     suite = unittest.makeSuite(test_POEngine)
     return suite
-- 
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