proxy: Add a "proxy" theme that selects other themes based on the path.

diff --git a/plugin/theme/proxy.py b/plugin/theme/proxy.py
new file mode 100644 (file)
index 0000000..58e4ab2
--- /dev/null
+++ b/plugin/theme/proxy.py
@@ -0,0 +1,42 @@
+# -*- coding: iso-8859-1 -*-
+"""
+    MoinMoin - Generic website theme.
+
+    @copyright: 2009+ Matthijs Kooijman
+    @license: GNU GPL, see COPYING for details.
+
+    This theme simply loads other themes, depending on the url requested.
+
+    To use this theme, set the default theme to 'proxy' and set the
+    configuration value 'proxy_theme_mapping' to a list of (prefix, themename)
+    tuples (which will be tested in order, so be sure to include a theme with
+    an empty prefix at the end). For example:
+
+        proxy_theme_mapping = [
+            ('/Site/', 'deadfoxjunction'),
+            ('', 'modernized'),
+        ]
+
+    The prefixes are matched against the page requested, so urls within
+    MoinMoin (and a trailing slash is included).
+
+    This theme does not currently play well with user-selectable themes, since
+    that would completely bypass the proxy plugin. For now it is probably best
+    to set the theme_force configuration variable.
+"""
+
+from MoinMoin.theme import load_theme, ThemeNotFound
+
+def Theme(context):
+    """
+    Usually, a theme plugin defines a Theme class, whose constructor is
+    called.  Instead, we define a Theme function that calls the proper
+    constructor.
+    """
+    for (prefix, theme) in context.cfg.proxy_theme_mapping:
+        if context.request.path.startswith(prefix):
+            return load_theme(context, theme)
+
+    raise ThemeNotFound("proxy_theme_mapping defines no theme for url: %s" % (context.request.path))
+
+# vim: set sw=4 sts=4 expandtab: