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Easier z3c.pagelet handling

Project description

gocept.pagelet

Easier z3c.pagelet handling

Copyright (c) 2007-2016 gocept gmbh & co. kg All Rights Reserved.

This software is subject to the provisions of the Zope Public License, Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution. THIS SOFTWARE IS PROVIDED “AS IS” AND ANY AND ALL EXPRESS OR IMPLIED WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE.

Changes

1.0 (2016-04-06)

  • Update bootstrap.py to a zc.buildout 2.3.
  • Use py.test as test runner.
  • Declare the explicit support of Python 2.7. No other Python versions are currently supported.

0.4 (2013-03-28)

  • When registering a pagelet using ZCML which only has template, the name of the template is rendered in the repr the generated class to have a clue what is the purpose of this class when debugging.
  • Updated tests to use Python’s doctest instead of deprecated zope.testing.doctest.

0.3 (2009-12-27)

  • Using zope.browserpage and zope.browsermenu instead of zope.app.publisher.

0.2 (2009-12-27)

  • Allow arbitrary number of context elements for adaptation.

0.1 (2008-09-20)

  • First public release.

Contributors

  • Michael Howitz <mh at gocept dot com>
  • Christian Theune <ct at gocept dot com>

Easy z3c.pagelet registration

The <gocept:pagelet> directive allows easier registration of z3c.pagelets. It behaves quite like <browser:page>.

Setup

We need some zcml setup:

>>> import sys
>>> from zope.configuration import xmlconfig
>>> import gocept.pagelet
>>> context = xmlconfig.file('meta.zcml', gocept.pagelet)

Template only

It is possible to just use a template as pagelet. A class is not required:

>>> context = xmlconfig.string("""
... <configure
...     xmlns:gocept="http://namespaces.gocept.com/zcml">
...   <gocept:pagelet
...       name="index.html"
...       for="*"
...       permission="zope.Public"
...       template="test-template.pt"
...       />
... </configure>
... """, context)

We should now have a page:

>>> import zope.component
>>> from zope.publisher.browser import TestRequest
>>> pagelet = zope.component.getMultiAdapter(
...     (object, TestRequest()), name='index.html')
>>> pagelet
<gocept.pagelet.zcml.SimplePagelet from .../gocept/pagelet/test-template.pt object at 0x...>
>>> pagelet.__name__
u'index.html'

When we render the pagelet the test-template is used:

>>> pagelet.render()
u'Hello from the test template.\n'

Class only

Of course it’s also possible to register a class without a template. Create a class and make it available in a module:

>>> from z3c.pagelet.browser import BrowserPagelet
>>> class MyPagelet(BrowserPagelet):
...     """Custom pagelet"""
...     def render(self):
...         return u"Hello from the custom pagelet."""

Make it available under the fake package custom:

>>> sys.modules['custom'] = type(
...     'Module', (),
...     {'MyPagelet': MyPagelet})()

Make it available via ZCML:

>>> context = xmlconfig.string("""
... <configure
...     xmlns:gocept="http://namespaces.gocept.com/zcml">
...   <gocept:pagelet
...       name="class.html"
...       for="*"
...       permission="zope.Public"
...       class="custom.MyPagelet"
...       />
... </configure>
... """, context)

Get the pagelet:

>>> pagelet = zope.component.getMultiAdapter(
...     (object, TestRequest()), name='class.html')
>>> pagelet
<gocept.pagelet.zcml.MyPagelet object at 0x...>
>>> pagelet.render()
u'Hello from the custom pagelet.'

Class and template

It’s for course also possible to specify both class and template. So create another pagelet class and register it:

>>> class MyPagelet2(BrowserPagelet):
...     """Custom pagelet"""
...     i_am_very_custom = True
>>> sys.modules['custom'] = type(
...     'Module', (),
...     {'MyPagelet': MyPagelet2})()

Make it available via zcml:

>>> context = xmlconfig.string("""
... <configure
...     xmlns:gocept="http://namespaces.gocept.com/zcml">
...   <gocept:pagelet
...       name="class-template.html"
...       for="*"
...       permission="zope.Public"
...       class="custom.MyPagelet"
...       template="test-template.pt"
...       />
... </configure>
... """, context)
>>> pagelet = zope.component.getMultiAdapter(
...     (object, TestRequest()), name='class-template.html')
>>> pagelet
<gocept.pagelet.zcml.MyPagelet2 object at 0x...>
>>> pagelet.render()
u'Hello from the test template.\n'
>>> pagelet.i_am_very_custom
True

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