z3ext.skintool 1.1.0

Tool for merging skin layers at runtime

Latest Version: 1.2.0

Detailed Documentation
======================


=========
Skin tool
=========

Skin tool allow configure skin at runtime for each ISite object.

  >>> from z3ext.skintool import interfaces, zcml
  >>> from z3ext.skintool.tool import skinToolModified

  >>> from zope import interface, component, schema

We need site object and request

  >>> from zope.app.component.hooks import getSite
  >>> site = getSite()

  >>> from zope.publisher.browser import TestRequest
  >>> request = TestRequest()

Now let's define layer and skin

  >>> from zope import interface
  >>> class IMySkin(interface.Interface):
  ...     pass
  >>> class IMyLayer(interface.Interface):
  ...     pass

Before we can use IMySkin and IMyLayer we should register it in local registry

  >>> zcml.skinDirective(IMySkin, u'myskin', u'My skin', '', ())
  >>> zcml.layerDirective(IMyLayer, u'mylayer', u'My layer', '')

Now skin and layer should be listed in vocabulary.

  >>> from z3ext.skintool.vocabulary import SkinsVocabulary
  >>> voc = SkinsVocabulary()(site)
  >>> term = voc.getTerm(IMySkin)
  >>> term.value == u'myskin'
  True
  >>> term.title == 'My skin'
  True
  >>> term.token == u'myskin'
  True

  >>> from z3ext.skintool.vocabulary import LayersVocabulary
  >>> voc = LayersVocabulary()(site)
  >>> term = voc.getTerm(IMyLayer)
  >>> term.value == u'mylayer'
  True
  >>> term.title == 'My layer'
  True
  >>> term.token == u'mylayer'
  True

All layers applied in IBeforeTraverseEvent event for ISite object. We will
use handler directly.

  >>> from z3ext.skintool.subscribers import threadServiceSubscriber
  >>> from zope.app.publication.interfaces import BeforeTraverseEvent

Let's check layer for our request.

  >>> threadServiceSubscriber(site, BeforeTraverseEvent(site, request))

  >>> IMySkin.providedBy(request)
  False

  >>> IMyLayer.providedBy(request)
  False

This is because we should configure skin tool to use our layer and
site object should implement ISkinable interface.

  >>> interface.directlyProvides(site, interfaces.ISkinable)

Let's configure skin tool

  >>> tool = component.getUtility(interfaces.ISkinTool)
  >>> tool.skin = u'myskin'
  >>> tool.layers = [u'mylayer']
  >>> skinToolModified()

Let's try again

  >>> threadServiceSubscriber(site, BeforeTraverseEvent(site, request))
  >>> IMySkin.providedBy(request)
  True
  >>> IMyLayer.providedBy(request)
  True

Change layers config

  >>> tool.layers = []
  >>> skinToolModified()

  >>> threadServiceSubscriber(site, BeforeTraverseEvent(site, request))
  >>> IMyLayer.providedBy(request)
  False


Skin can depends on other layers

  >>> class IMySkin2(interface.Interface):
  ...     pass

  >>> zcml.skinDirective(IMySkin2, u'myskin2', u'My skin2', '', (IMyLayer,))
  >>> tool.skin = u'myskin2'
  >>> skinToolModified()

  >>> threadServiceSubscriber(site, BeforeTraverseEvent(site, request))
  >>> IMySkin2.providedBy(request)
  True
  >>> IMyLayer.providedBy(request)
  True

We can define default layer, that will added automaticly

  >>> class IDefaultLayer(interface.Interface):
  ...     pass

We have to register utility IDefaultLayer

  >>> component.provideUtility(IDefaultLayer, interfaces.IDefaultLayer, 'default')
  >>> tool.layers = [u'mylayer']
  >>> skinToolModified()

  >>> threadServiceSubscriber(site, BeforeTraverseEvent(site, request))
  >>> IMyLayer.providedBy(request)
  True
  >>> IDefaultLayer.providedBy(request)
  True


z3ext:layer directive
---------------------

We can do same with z3ext:layer directive. We need load zcml file:

  >>> import z3ext.skintool
  >>> from zope.configuration import xmlconfig
  >>> context = xmlconfig.file('meta.zcml', z3ext.skintool)

  >>> context = xmlconfig.string("""
  ... 
  ...  
  ... """, context)

  >>> voc = LayersVocabulary()(site)
  >>> term = voc.getTerm(IMyLayer)
  >>> term.value == u'mylayer3'
  True
  >>> term.title == 'My zcml layer'
  True
  >>> term.token == u'mylayer3'
  True

  >>> tool.user_layers = ['mylayer3']
  >>> skinToolModified()

  >>> threadServiceSubscriber(site, BeforeTraverseEvent(site, request))
  >>> IMyLayer.providedBy(request)
  True

  >>> context = xmlconfig.string("""
  ... 
  ...  
  ... """, context)

  >>> tool.skin = u'myskin4'
  >>> skinToolModified()

  >>> threadServiceSubscriber(site, BeforeTraverseEvent(site, request))
  >>> IMySkin2.providedBy(request)
  True
  >>> IMyLayer.providedBy(request)
  True


=======
CHANGES
=======

1.1.0 (2008-11-21)
------------------

- Added z3ext:skin directive

- API refactored

- Added translations: nl, ru


1.0.2 (2008-08-07)
------------------

- Added INoSkinSwitching for skin that does not allow skin switching


1.0.1 (2008-05-16)
------------------

- Replace 'autoinclude' with 'includeDependendcies'


1.0.0 (2008-03-28)
------------------

- Code cleanup

- Added tests

- Code moved to svn.zope.org


0.13 (2008-02-28)
----------------

- Use z3c.autoinclude

- Do not generate InterfaceClass object, just apply list of layers


0.12 (2008-02-08)
-----------------

- Code cleanup


0.11 (2008-02-06)
------------------

- Added ISkinable marker interface.
  Now object should implement ISkinable implicitly to support skintool


0.10 (2008-02-01)
------------------

- Initial release.

• Author: Nikolay Kim <fafhrd91 at gmail com>
• Home Page: http://z3ext.net/
• License: ZPL 2.1
• Categories
  • Development Status :: 5 - Production/Stable
  • Environment :: Web Environment
  • Framework :: Zope3
  • Intended Audience :: Developers
  • License :: OSI Approved :: Zope Public License
  • Natural Language :: English
  • Operating System :: OS Independent
  • Programming Language :: Python
  • Topic :: Internet :: WWW/HTTP
• Package Index Owner: fafhrd
• DOAP record: z3ext.skintool-1.1.0.xml