Zope3 Change Dimension information

Now, of course, when we look at the message content view, it displays the number of entries in the message, including reply messages and attachments (files and images). It is a good idea to display the size field with "X-reply, y-attachment." A very simple adapter to handle the size output, the adapter isized will be modified by imessage.

Step I: Implementation of the adapter

An adapter is usually a simple class that treats an object as a constructor parameter. This class must provide a "from" interface, which is also often listed in the ' Used_for ' attribute of the class. Add the following code to your message.py file:

#!python
From zope.app.size.interfaces import isized

Class Messagesized (object):

Implements (isized)
<u>used_for</u> = IMessage

def <u>init</u> (self, message):
Self._message = Message

def sizeforsorting (self):
"" "Isized" ""
Return (' Item ', Len (self._message))
def sizeforhttp://www.aliyun.com/zixun/aggregation/16502.html ">display (self):
"" "Isized" ""
Messages = 0
For obj in Self._message.values ():
If Imessage.providedby (obj):
Messages + 1

Attachments = Len (self._message)-messages

If messages = = 1:size = = U ' 1 reply '
else:size = U '%i replies '%messages

If attachments = = 1:size + u ', 1 attachment '
else:size = U ',%i attachments '%attachments

return size

The Isized interface specifies two methods:

10–12 line: sizeforstring () must return a tuple with the first element being unit and the second value (value). Select a format that provides a common size representation comparison.
第14-19 line: Sizefordisplay () returns a Unicode string representing any kind of object size. The output should not be too long (my already very long). As we promised to display the replies and attachments separately.