# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1350837802 -7200
# Node ID 02276ff148642159332610f10a28bdf918439162
# Parent  3bd63c166dd56ebd829fb4001a1d58b44bd200dc
Added HTML option list output originally used in EventAggregator.
Added handling of non-existent pages when obtaining page metadata.

diff -r 3bd63c166dd5 -r 02276ff14864 MoinSupport.py
--- a/MoinSupport.py	Sat Sep 29 16:58:57 2012 +0200
+++ b/MoinSupport.py	Sun Oct 21 18:43:22 2012 +0200
@@ -412,6 +412,21 @@
 
         return value in input_values and 'selected="selected"' or ''
 
+    def get_option_list(self, value, values):
+
+        """
+        Return a list of HTML element definitions for options describing the
+        given 'values', selecting the option with the specified 'value' if
+        present.
+        """
+
+        options = []
+        for available_value in values:
+            selected = self._get_selected(available_value, value)
+            options.append('<option value="%s" %s>%s</option>' % (
+                escattr(available_value), selected, wikiutil.escape(available_value)))
+        return options
+
     def _get_input(self, form, name, default=None):
 
         """
@@ -817,6 +832,10 @@
     # Get the initial revision of the page.
 
     revisions = page.getRevList()
+
+    if not revisions:
+        return {}
+
     event_page_initial = Page(request, page.page_name, rev=revisions[-1])
 
     # Get the created and last modified times.