# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1362874788 -3600
# Node ID e09466179fcba618df5461f21805316d935cd74e
# Parent  959d119cf5f428888417f381a67483e460993719
Added a macro to show messages in a message store.

diff -r 959d119cf5f4 -r e09466179fcb macros/ShowMessages.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/macros/ShowMessages.py	Sun Mar 10 01:19:48 2013 +0100
@@ -0,0 +1,106 @@
+# -*- coding: iso-8859-1 -*-
+"""
+    MoinMoin - ShowMessages Macro
+
+    @copyright: 2012, 2013 by Paul Boddie <paul@boddie.org.uk>
+    @license: GNU GPL (v2 or later), see COPYING.txt for details.
+"""
+
+from MoinSupport import \
+    ItemStore, get_form, parseMacroArguments, getParsersForContentType, formatText
+from email.parser import Parser
+
+try:
+    from cStringIO import StringIO
+except ImportError:
+    from StringIO import StringIO
+
+Dependencies = ['pages']
+
+# Macro functions.
+
+def execute(macro, args):
+
+    """
+    Execute the 'macro' with the given 'args' to produce a list of messages from
+    a message store associated with the current page.
+    """
+
+    request = macro.request
+    fmt = macro.formatter
+    page = fmt.page
+    _ = request.getText
+
+    # Interpret the arguments.
+
+    parsed_args = dict(parseMacroArguments(args))
+    fragment = parsed_args.get("fragment")
+
+    # Obtain any request parameters corresponding to the field.
+    # NOTE: Get selection of representations for display.
+
+    form = get_form(request)
+
+    # Show the messages.
+    # NOTE: Support additional access control.
+
+    store = ItemStore(page, ("messages",), ("message-locks",))
+
+    output = []
+    output.append(fmt.div(on=1, css_class="showmessages-messages"))
+
+    for message_text in iter(store).reversed():
+        message = Parser().parse(StringIO(message_text))
+
+        # Determine whether the message has several representations.
+
+        if not message.is_multipart():
+            parts = [message]
+        else:
+            parts = message.get_payload()
+
+        # Show the parts.
+
+        output.append(fmt.div(on=1, css_class="showmessages-message"))
+        first = True
+
+        for part in parts:
+
+            # Set the appearance of the part.
+
+            extra_flags = first and " showmessages-shown-part" or ""
+            css_class = "showmessages-message-part%s" % extra_flags
+
+            output.append(fmt.div(on=1, css_class=css_class))
+
+            # Find a parser for the content type.
+
+            mimetype = part.get_content_type()
+            parsers = getParsersForContentType(request.cfg, mimetype)
+
+            if parsers:
+                for parser_cls in parsers:
+
+                    # NOTE: Could check for output_mimetypes and use formatForOutputType.
+                    # Emit the parsed content.
+
+                    output.append(formatText(part.get_payload(), request, fmt, parser_cls=parser_cls))
+                    break
+            else:
+                output.append(fmt.text(_("Update cannot be shown for content of type %s.") % mimetype))
+
+            # End message part.
+
+            output.append(fmt.div(on=0))
+            first = False
+
+        # End message.
+
+        output.append(fmt.div(on=0))
+
+    # End message list.
+
+    output.append(fmt.div(on=0))
+    return u"".join(output)
+
+# vim: tabstop=4 expandtab shiftwidth=4