Add a white plugin, black backgrounds matter!

plugins/white.py

@@ -0,0 +1,28 @@
+"""
+This plugin colors each character of a message in white.
+
+Usage
+-----
+
+.. glossary::
+
+    /load white
+
+        Say something in a Chat tab.
+
+.. note:: This plugin is best used when someone else is writing in black,
+assuming everyone is using a white background.  Black backgrounds matter too!
+"""
+
+from plugin import BasePlugin
+import xhtml
+
+class Plugin(BasePlugin):
+    def init(self):
+        self.api.add_event_handler('muc_say', self.whiteify)
+        self.api.add_event_handler('private_say', self.whiteify)
+        self.api.add_event_handler('conversation_say', self.whiteify)
+
+    @staticmethod
+    def whiteify(msg, _):
+        msg['body'] = '\x197}' + xhtml.clean_text(msg['body'])