source: products/quintagroup.themetemplate/trunk/quintagroup/themetemplate/README.txt @ 3048

qplone3 theme template
======================

quintagroup.themetemplate is an enhanced "Plone 3 Theme" template from Zopeskel, 
that includes addcontent local command, which allows you to extend base Plone theme
by additional elements, such as: skin layers, portlets, viewlets, css and js resources, 
and objects in zexp files. This package is an analogue of Archetype template in terms 
of its functionality.

quintagroup.themetemplate package is used for development of all Quintagroup themes 
for Plone 3 at http://skins.quintagroup.com.

Contents
--------
1. Overview
2. Creating theme package
3. Extending theme
4. Release notes

Overview
========

This theme template allows you to create initial theme package skeleton,
i.e. create plone3 theme python package with nested namespace (this is different from 
deafult plone3_theme template in Zopeskel) 

After that you can extend theme package by the following elements:

- skin-layer(s)
- portlet(s)
- viewlet(s)
- css, js resource(s)
- objects in zexp files

Creation of a package is performed with *paster create* PasteScript command.
Theme extending with other resources can be done with *paster addcontent*
local ZopeSkel command (extended in this product).

Creating theme package
======================

Let's create plone-3 theme python package.
Use `paster create` command for that::

    >>> paster('create -t qplone3_theme quintagroup.theme.example --overwrite')
    paster create -t qplone3_theme quintagroup.theme.example ...
    ...

You got standard python package content with

- *quintagroup* upper level namespace.
- *quintagroup.theme.example-configure.zcml* - zcml file for adding into package-includes directory

Check that::

    >>> package_dir = 'quintagroup.theme.example'
    >>> objects = ['setup.py', 'quintagroup', 'quintagroup.theme.example-configure.zcml']
    >>> objects.sort()
    >>> [o for o in objects if o in os.listdir(package_dir)]
    ['quintagroup', 'quintagroup.theme.example-configure.zcml', 'setup.py']


*qplone3_theme* template - creates theme with nested namespace.

By default - theme is placed in *quintagroup.theme.<3rd part of dotted package name> namespace*

in our case - quintagroup.theme.example

So check namespaces::

    >>> theme_namespace = os.path.join(package_dir,'quintagroup','theme','example')
    >>> os.path.isdir(theme_namespace)
    True

Theme holds 3 subdirectories (browser, profiles, skins)::

    >>> cd(theme_namespace)
    >>> dirs = ('skins', 'browser', 'profiles')
    >>> [True for d in dirs if d in os.listdir('.')]
    [True, True, True]

And initialization files (__init__.py, configure.zcml) ::

    >>> files = ('__init__.py', 'configure.zcml')
    >>> [True for d in files if d in os.listdir('.')]
    [True, True]
    

*browser* directory
-------------------

Browser directory contains:

- 'templates' resource directory
- interfaces.py module with IThemeSpecific marker interface
- configure.zcml, with registered theme marker interface::

    >>> ls('browser')
    __init__.py
    configure.zcml
    interfaces.py
    templates

    >>> cat('browser/interfaces.py')
    from plone.theme.interfaces import IDefaultPloneLayer
    <BLANKLINE>
    class IThemeSpecific(IDefaultPloneLayer):
    ...

    >>> cat('browser/configure.zcml')
    <configure
    ...
        <interface
            interface=".interfaces.IThemeSpecific"
            type="zope.publisher.interfaces.browser.IBrowserSkinType"
            name="Custom Theme"
            />
    ...

As we see, default theme name is 'Custom Theme', but on theme
creation you can point out your own name. Check this ...

First create configuration file with different skin name::

    >>> conf_data = """
    ... [pastescript]
    ... skinname=My Theme Name
    ... """
    >>> file('theme_config.conf','w').write(conf_data)

Create the same theme with your own skin name and check this::

    >>> paster('create -t qplone3_theme quintagroup.theme.example --overwrite --config=theme_config.conf')
    paster create ...
    >>> cd(package_dir)
    >>> cat('quintagroup/theme/example/browser/configure.zcml')
    <configure
    ...
        <interface
            interface=".interfaces.IThemeSpecific"
            type="zope.publisher.interfaces.browser.IBrowserSkinType"
            name="My Theme Name"
            />
    ...


*skins* directory
-----------------

It contains only README.txt file and NO SKIN LAYERS YET.
This is a job for localcommand ;)

But check whether I am right ...::

    >>> cd('quintagroup/theme/example')
    >>> ls('skins')
    README.txt


*profiles* directory
--------------------

There is 'default' and uninstall profiles inside::

    >>> 'default' in os.listdir('profiles')
    True
    >>> 'uninstall' in os.listdir('profiles')
    True

There are the following items in default profile:

- import_steps.xml - for any reason.
- skins.xml - for registering skins directory::

    >>> cd('profiles/default')
    >>> 'import_steps.xml' in os.listdir('.')
    True
    >>> 'skins.xml' in os.listdir('.')
    True

*skins.xml* profile makes your theme default on installation
and uses layers list from 'Plone Default' for our theme,
without any new layers (yet)::

    >>> cat('skins.xml')
    <?xml version="1.0"?>
    ...
    <object name="portal_skins" ...
            default_skin="My Theme Name" request_varname="plone_skin">
    ...
    <skin-path name="My Theme Name" based-on="Plone Default">
      <!-- -*- extra layer stuff goes here -*- -->
    <BLANKLINE>
    </skin-path>
    ...

*import_steps.xml* - call _setupVarious_ function from
_setuphandlers.py_ module for additional installation steps::

    >>> cat('import_steps.xml')
    <?xml version="1.0"?>
    ...
    <import-step id="quintagroup.theme.example.various"
    ...
                 handler="quintagroup.theme.example.setuphandlers.setupVarious"
    ...
    </import-step>
    ...

Look at setuphandlers.py module::

    >>> cd('../..')
    >>> cat('setuphandlers.py')
        def setupVarious(context):
    ...


Extending theme
===============

One of the best features, which ZopeSkel package brings, is *localcommand*.

This part shows how you can extend a theme (generated with qplone3_theme
ZopeSkel template) with additional useful stuff:

- skin layers
- views
- viewlets
- portlets
- css
- javascripts
- objects in zexp files

So, in qplone3_theme generated package you can use *addcontent* ZopeSkel
local command.

IMPORTANT TO NOTE: localcommand (addcontent in our case) should be
called in any subdirectory of the generated theme package. And it won't
work outside this package::

    >>> paster('addcontent -a')
    paster addcontent -a
      ...
        css_dtml_skin:   A DTML file in skin layer with CSS registration
        css_resource:    A Plone 3 CSS resource template
      ...
        import_zexps:    A template for importing zexp-objects into portal on installation
        js_resource:     A Plone 3 JS resource template
      N portlet:         A Plone 3 portlet
      ...
        skin_layer:      A Plone 3 Skin Layer
      ...
      N view:            A browser view skeleton
        viewlet_hidden:  A Plone 3 Hidden Viewlet template
        viewlet_order:   A Plone 3 Order Viewlet template
      ...


We can see a list of extention subtemplates, which can be used for our theme.
'N' character tells us that these subtemplates are registered for other (archetype)
template, but it does not matter - they can correctly extend our theme.


Adding SKIN LAYER
=================

For that case use *skin_layer* subtemplate with *addcontent* local command::

    >>> paster('addcontent skin_layer')
    paster addcontent skin_layer ...
    Recursing into profiles
    ...

This command adds NEW 'skin_layer' (default name) directory to _skins_ directory,
with only CONTENT.txt file inside::

    >>> 'skin_layer' in os.listdir('skins')
    True
    >>> ls('skins/skin_layer')
    CONTENT.txt

*skins.xml* profile is also updated::

    >>> cat('profiles/default/skins.xml')
    <?xml version="1.0"?>
    ...
    <object name="portal_skins" allow_any="False" cookie_persistence="False"
       default_skin="My Theme Name" request_varname="plone_skin">
    ...
     <object name="skin_layer"
        meta_type="Filesystem Directory View"
        directory="quintagroup.theme.example:skins/skin_layer"/>
    ...
     <skin-path name="My Theme Name" based-on="Plone Default">
    ...
      <layer name="skin_layer"
         insert-after="custom"/>
    <BLANKLINE>
     </skin-path>
    ...

We can see, that: 

- skin_layer directory was registered as Filesystem Directory View
- skin_layer Filesystem Directory View was added to our theme layers list


Adding PORTLET
==============

Only initialization files are available in portlets directory before adding new portlet::

    >>> ls('portlets')
    __init__.py
    configure.zcml

Add portlet with *portlet* subtemplate::

    >>> paster('addcontent portlet')
    paster addcontent portlet ...
    ...
    Recursing into portlets
    ...

After executing this local command ...

configure.zcml file in the theme root directory - includes portlets registry::

    >>> cat('configure.zcml')
    <configure
    ...
    <include package=".portlets" />
    ...

exampleportlet.pt template and exampleportlet.py script added to portlets directory::
  
  >>> files = ('exampleportlet.pt', 'exampleportlet.py')
    >>> [True for d in files if d in os.listdir('portlets')]
    [True, True]

And portlets/configure.zcml - register new portlet::

    >>> cat('portlets/configure.zcml')
    <configure
    ...
         <plone:portlet
             name="quintagroup.theme.example.portlets.ExamplePortlet"
             interface=".exampleportlet.IExamplePortlet"
             assignment=".exampleportlet.Assignment"
             view_permission="zope2.View"
             edit_permission="cmf.ManagePortal"
             renderer=".exampleportlet.Renderer"
             addview=".exampleportlet.AddForm"
             editview=".exampleportlet.EditForm"
             />
    ...

Finally, new portlet type is registered in portlets.xml profile::

    >>> cat('profiles/default/portlets.xml')
    <?xml version="1.0"?>
    ...
       <portlet
         addview="quintagroup.theme.example.portlets.ExamplePortlet"
         title="Example portlet"
         description=""
         i18n:attributes="title; description"
         />
    ...

Thanks to ZopeSkel developers for this subtempalte ;)


Adding CSS resource
===================

Use *css_resource* subtemplate::

    >>> paster("addcontent css_resource")
    paster addcontent css_resource ...
    Recursing into browser
    ...
    Recursing into profiles
    ...

This template adds (if does not exist yet) _stylesheets_ directory in _browser_
directory::

    >>> 'stylesheets' in os.listdir('browser')
    True

In _stylesheets_ resource directory empty main.css stylesheet
resource added::

    >>> 'main.css' in os.listdir('browser/stylesheets')
    True
    >>> cat('browser/stylesheets/main.css')
    <BLANKLINE>


New resource directory was registered in configure.zcml::

    >>> cat('browser/configure.zcml')
    <configure
    ...
        <browser:resourceDirectory
            name="quintagroup.theme.example.stylesheets"
            directory="stylesheets"
            layer=".interfaces.IThemeSpecific"
            />
    ...
    

And cssregistry.xml profile was added into profiles/default directory with
registered main.css stylesheet::

    >>> 'cssregistry.xml' in os.listdir('profiles/default')
    True
    >>> cat('profiles/default/cssregistry.xml')
    <?xml version="1.0"?>
    <object name="portal_css">
    <BLANKLINE>
     <stylesheet title=""
        id="++resource++quintagroup.theme.example.stylesheets/main.css"
        media="screen" rel="stylesheet" rendering="inline"
        cacheable="True" compression="safe" cookable="True"
        enabled="1" expression=""/>
    ...



Adding CSS resource as dtml-file into skins layer
=================================================

This template actually absolutely same to the previouse one, but layer_name
variable added to point in which skin layer css dtml-file should be added to.
And, of course, css resource added into pointing *skins/<layer_name>/<css_reseource_name>.dtml* file.

This subtemplate has several benefits before registering css as resource layer:

- in dtml file you can use power of dtml language
- this resource can be overriden by customer if he needs that

IMPORTANT:
For add css resource in registered skin layer - you should use this subtemplate
in conjunction with *skin_layer* one.


Use *css_dtml_skin* subtemplate::

    >>> paster("addcontent css_dtml_skin")
    paster addcontent css_dtml_skin ...
    Recursing into profiles
    ...
    Recursing into skins
    ...

This template adds main.css.dtml file into skins/skin_layer folder::

    >>> 'main.css.dtml' in os.listdir('skins/skin_layer')
    True

The main.css.dtml file already prepared to use as dtml-document::

    >>> cat('skins/skin_layer/main.css.dtml')
    /*
    ...
    /* <dtml-with base_properties> (do not remove this :) */
    ...
    /* </dtml-with> */
    <BLANKLINE>
  

And cssregistry.xml profile was added into profiles/default directory with
registered main.css stylesheet::

    >>> 'cssregistry.xml' in os.listdir('profiles/default')
    True
    >>> cat('profiles/default/cssregistry.xml')
    <?xml version="1.0"?>
    <object name="portal_css">
    <BLANKLINE>
     <stylesheet title=""
        id="++resource++quintagroup.theme.example.stylesheets/main.css"
        media="screen" rel="stylesheet" rendering="inline"
        cacheable="True" compression="safe" cookable="True"
        enabled="1" expression=""/>
    ...


Adding JAVASCRIPT resource
--------------------------

Use *js_resource* subtemplate::

    >>> paster('addcontent js_resource')
    paster addcontent js_resource ...
    Recursing into browser
    ...
    Recursing into profiles
    ...

This template adds (if does not exist yet) _scripts_ directory in _browser_
directory::

    >>> 'scripts' in os.listdir('browser')
    True


Empty foo.js javascript file was added to _scripts_ directory::

    >>> 'foo.js' in os.listdir('browser/scripts')
    True
    >>> cat('browser/scripts/foo.js')
    <BLANKLINE>


New resource directory was registered in configure.zcml, if has not been registered yet::

    >>> cat('browser/configure.zcml')
    <configure
    ...
        <browser:resourceDirectory
            name="quintagroup.theme.example.scripts"
            directory="scripts"
            layer=".interfaces.IThemeSpecific"
            />
    ...
    

cssregistry.xml profile was added into profiles/default directory (if does not exist yet),
and register new foo.js javascript resource::

    >>> 'jsregistry.xml' in os.listdir('profiles/default')
    True
    >>> cat('profiles/default/jsregistry.xml')
    <?xml version="1.0"?>
    <object name="portal_javascripts">
    ...
     <javascript
        id="++resource++quintagroup.theme.example.scripts/foo.js"
        inline="False" cacheable="True" compression="safe"
        cookable="True" enabled="1"
        expression=""
        />
    ...



Test viewlets subtemplates
==========================

There are 2 types of viewlet subtemplates:

- viewlet_order
- viewlet_hidden

The first one is used for adding new viewlets and setting 
viewlets order for the ViewletManager, the second one only hides
viewlet in pointed ViewletManager.

Ordered NEW viewlet
-------------------

Use *viewlet_order* subtemplate::

    >>> paster('addcontent viewlet_order')
    paster addcontent viewlet_order ...
    Recursing into browser
    ...
    Recursing into templates
    ...
    Recursing into profiles
    ...

This template adds (if not exist ;)) _viewlets.py_ module in browser directory.
With added Example ViewletBase class, which is bound to templates/example_viewlet.pt
template::

    >>> 'viewlets.py' in os.listdir('browser')
    True
    
    >>> cat('browser/viewlets.py')
    from Products.CMFCore.utils import getToolByName
    from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile
    from plone.app.layout.viewlets import common
    ...
    class Example(common.ViewletBase):
        render = ViewPageTemplateFile('templates/example_viewlet.pt')
    <BLANKLINE>

Check template file in templates directory::

    >>> 'example_viewlet.pt' in os.listdir('browser/templates')
    True
    >>> cat('browser/templates/example_viewlet.pt')
    <BLANKLINE>

New viewlet is registered in configure.zcml::

    >>> cat('browser/configure.zcml')
    <configure
    ...
       <browser:viewlet
            name="quintagroup.theme.example.example"
            manager="plone.app.layout.viewlets.interfaces.IPortalHeader"
            class=".viewlets.Example"
            layer=".interfaces.IThemeSpecific"
            permission="zope2.View"
            />
    ...
    

viewlets.xml profile is added to profiles/default directory with new viewlet 
registration, ordered for specified viewlet manager::

    >>> 'viewlets.xml' in os.listdir('profiles/default')
    True
    >>> cat('profiles/default/viewlets.xml')
    <?xml version="1.0"?>
    <object>
    ...
     <order manager="plone.portalheader"
             based-on="Plone Default"
             skinname="My Theme Name" >
    ...
        <viewlet name="quintagroup.theme.example.example" insert-after="*" />
    <BLANKLINE>
      </order>
    <BLANKLINE>
    </object>



Hide EXISTING viewlet
---------------------

For that case you can use *viewlet_hidden* subtemplate::

    >>> paster('addcontent viewlet_hidden')
    paster addcontent viewlet_hidden ...
    Recursing into profiles
    ...

As we see from upper log - there is stuff for adding/updating profiles only.
    

There is viewlet.xml profile in profiles/default directory
which hides viewlet for specified viewlet manager::

    >>> 'viewlets.xml' in os.listdir('profiles/default')
    True
    >>> cat('profiles/default/viewlets.xml')
    <?xml version="1.0"?>
    <object>
    ...
      <hidden manager="plone.portalheader" skinname="My Theme Name">
    ...
        <viewlet name="example" />
    <BLANKLINE>
      </hidden>
    ...
    </object>


Adding ZEXPs importing
======================

Imagine situation, when you develop a theme, which uses some 
extra portal objects (documents with text for some potlets)
Then customer of your theme can edit these objects according
to his need.

For this situation *import_zexps* subtemplate exists.

*import_zexps* subtemplate extends your theme with
mechanism for importing list of zexp formated files
into portal root on theme instllation::

    >>> paster('addcontent import_zexps')
    paster addcontent import_zexps ...
    ...
    Recursing into import
    ...
    Recursing into profiles
    ...
    Inserting from profiles.zcml_insert ...
    ...
    Inserting from setuphandlers.py_insert into ...
    ...

As we see from the upper log

- 'import' directory was added into root of the theme
- profiles stuff was updated
- profiles.zcml file is updated
- some stuff into setuphandlers.py module was inserted
    
1. There was empty 'import' directory added, where you
   will put zexp objects for install into portal root.::

    >>> ls('import')
    CONTENT.txt


2. import_steps.xml was added in profiles/import_zexps directory,
   which contains additional *quintagroup.theme.example.import_zexps* step::

    >>> 'import_zexps' in os.listdir('profiles')
    True
    >>> 'import_steps.xml' in os.listdir('profiles/import_zexps')
    True

    >>> cat('profiles/import_zexps/import_steps.xml')
    <?xml version="1.0"?>
    ...
      <import-step id="quintagroup.theme.example.import_zexps"
                   version="..."
                   handler="quintagroup.theme.example.setuphandlers.importZEXPs"
                   title="My Theme Name: Import zexps objects">
        Import zexp objects into portal on My Theme Name theme installation
      </import-step>
    <BLANKLINE>
    ...

3. profiles.zcml configuration updated with new genericsetup profile for zexps
   importing::

    >>> cat('profiles.zcml')
    <configure
    ...
      <genericsetup:registerProfile
        name="import_zexps"
        title="My Theme Name: Import ZEXPs"
        directory="profiles/import_zexps"
        description='Extension profile for importing objects of the "My Theme Name" Plone theme.'
        provides="Products.GenericSetup.interfaces.EXTENSION"
        />
    <BLANKLINE>
    ...
    
4. Check setuphandlers.py module - there must be importZEXPs function defined::

    >>> cat('setuphandlers.py')
    def setupVarious(context):
    ...
    def importZEXPs(context):
    ...

Then simply prepare zexp objects and copy them to *import* directory.


RELEASE NOTES !
===============

Before releasing theme - I suggest to clean up setup.py script:

- remove *theme_vars* argument (its value is useful only for theme development)

- remove *entry_points* argument (same reason). It's useless in plone for now.

- And remove *paster_plugins* argument too (it has sence in conjunction with entry_points during theme developing)

Steps mentioned above prevent possible problems with
theme distribution/deployment.

Notes:
------

* quintagroup.themetemplate v0.25 compatible with ZopeSkel >= 2.15