##############################################################################
#
# Copyright (c) 2006 Zope Corporation and Contributors.
# 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.
#
##############################################################################
"""Five baseclasses for zope.formlib.form

$Id$
"""
import os.path

import zope.formlib
from zope import interface
from zope.formlib import interfaces, form
from zope.i18nmessageid import MessageFactory
_ = MessageFactory("zope")

from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile
from Products.Five.browser.decode import processInputs, setPageEncoding

_FORMLIB_DIR = os.path.dirname(zope.formlib.__file__)
_PAGEFORM_PATH = os.path.join(_FORMLIB_DIR, 'pageform.pt')
_SUBPAGEFORM_PATH = os.path.join(_FORMLIB_DIR, 'subpageform.pt')


class FiveFormlibMixin(object):

    # Overrides the formlib.form.FormBase.template attributes implemented 
    # using NamedTemplates. NamedTemplates using ViewPageTemplateFile (like
    # formlib does by default) cannot work in Zope2.

    # XXX Maybe we need to have Five-compatible NamedTemplates?

    template = ViewPageTemplateFile(_PAGEFORM_PATH)

    # Overrides formlib.form.FormBase.update. Make sure user input is
    # decoded first and the page encoding is set before proceeding.

    def update(self):
        processInputs(self.request)
        setPageEncoding(self.request)
        super(FiveFormlibMixin, self).update()


class FormBase(FiveFormlibMixin, form.FormBase):
    pass


class EditFormBase(FiveFormlibMixin, form.EditFormBase):
    pass


class DisplayFormBase(FiveFormlibMixin, form.DisplayFormBase):
    pass


class AddFormBase(FiveFormlibMixin, form.AddFormBase):
    pass


class PageForm(FormBase):

    interface.implements(interfaces.IPageForm)

Form = PageForm


class PageEditForm(EditFormBase):

    interface.implements(interfaces.IPageForm)

EditForm = PageEditForm


class PageDisplayForm(DisplayFormBase):

    interface.implements(interfaces.IPageForm)

DisplayForm = PageDisplayForm


class PageAddForm(AddFormBase):

    interface.implements(interfaces.IPageForm)

AddForm = PageAddForm


class SubPageForm(FormBase):

    template = ViewPageTemplateFile(_SUBPAGEFORM_PATH)

    interface.implements(interfaces.ISubPageForm)


class SubPageEditForm(EditFormBase):

    template = ViewPageTemplateFile(_SUBPAGEFORM_PATH)

    interface.implements(interfaces.ISubPageForm)


class SubPageDisplayForm(DisplayFormBase):

    template = ViewPageTemplateFile(_SUBPAGEFORM_PATH)

    interface.implements(interfaces.ISubPageForm)