# HG changeset patch
# User paulb
# Date 1133196286 0
# Node ID 4b1a998aa4d10e9164fe6a266c4ab64a6a1ba7d2
# Parent  9062d0ca60ca99243fc2b60418d1c24848d987d5
[project @ 2005-11-28 16:44:45 by paulb]
Added choice extension function.

diff -r 9062d0ca60ca -r 4b1a998aa4d1 README.txt
--- a/README.txt	Mon Nov 28 01:28:31 2005 +0000
+++ b/README.txt	Mon Nov 28 16:44:46 2005 +0000
@@ -64,7 +64,7 @@
   * Added set_document to XSLForms.Fields.Form.
   * Added prepare_parameters to the XSLFormsResource class in the
     XSLForms.Resources.WebResources module.
-  * Added element-path and url-encode XSLForms extension functions.
+  * Added element-path, url-encode and choice XSLForms extension functions.
   * Improved Unicode support in the XSLForms extension functions.
   * Changed in-page requests to contain proper POST data.
   * Updated the code to work with WebStack 1.0 changes and adopted the
diff -r 9062d0ca60ca -r 4b1a998aa4d1 XSLForms/Output.py
--- a/XSLForms/Output.py	Mon Nov 28 01:28:31 2005 +0000
+++ b/XSLForms/Output.py	Mon Nov 28 16:44:46 2005 +0000
@@ -316,6 +316,22 @@
 
 # Utility functions.
 
+def choice(context, value, true_string, false_string=None):
+
+    """
+    Exposed as {template:choice(value, true_string, false_string)}.
+
+    Using the given boolean 'value', which may itself be an expression evaluated
+    by the XSLT processor, return the 'true_string' if 'value' is true or the
+    'false_string' if 'value' is false. If 'false_string' is omitted and if
+    'value' evaluates to a false value, an empty string is returned.
+    """
+
+    if value:
+        return true_string
+    else:
+        return false_string or ""
+
 def url_encode(context, nodes, charset="utf-8"):
 
     """
@@ -410,6 +426,7 @@
 
 # Utility functions.
 
+libxsltmod.xsltRegisterExtModuleFunction("choice", "http://www.boddie.org.uk/ns/xmltools/template", choice)
 libxsltmod.xsltRegisterExtModuleFunction("url-encode", "http://www.boddie.org.uk/ns/xmltools/template", url_encode)
 libxsltmod.xsltRegisterExtModuleFunction("element-path", "http://www.boddie.org.uk/ns/xmltools/template", element_path)