/usr/lib/python2.7/dist-packages/zope/html/browser.py is in python-zope.html 2.2.0-0ubuntu11.
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#
# Copyright (c) 2007 Zope Foundation 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.
#
##############################################################################
"""Browser views that implement editing and preview.
"""
__docformat__ = "reStructuredText"
import datetime
import zope.lifecycleevent
import zope.event
import zope.file.contenttype
import zope.file.interfaces
import zope.formlib.form
import zope.html.field
import zope.html.interfaces
import zope.mimetype.interfaces
from zope import mimetype
from zope.interface.common import idatetime
from i18n import _
UNIVERSAL_CHARSETS = ("utf-8", "utf-16", "utf-16be", "utf-16le")
def get_rendered_text(form):
f = form.context.open("r")
data = f.read()
f.close()
ci = mimetype.interfaces.IContentInfo(form.context)
return ci.decode(data)
class BaseEditingView(zope.formlib.form.Form):
# initial value helpers:
def get_rendered_isFragment(self):
info = zope.html.interfaces.IEditableHtmlInformation(self.context)
return info.isFragment
def get_rendered_encoding(self):
charset = self.context.parameters.get("charset")
if charset:
return zope.component.queryUtility(
mimetype.interfaces.ICharsetCodec, charset)
else:
return None
# field definitions:
view_fields = zope.formlib.form.Fields(
zope.html.interfaces.IEditableHtmlInformation,
)
view_fields["isFragment"].get_rendered = get_rendered_isFragment
encoding_field = zope.formlib.form.Field(
zope.schema.Choice(
__name__=_("encoding"),
title=_("Encoding"),
description=_("Character data encoding"),
source=mimetype.source.codecSource,
required=False,
))
encoding_field.get_rendered = get_rendered_encoding
reencode_field = zope.formlib.form.Field(
zope.schema.Bool(
__name__="reencode",
title=_("Re-encode"),
description=_("Enable encoding the text using UTF-8"
" instead of the original encoding."),
default=False,
)
)
msgCannotDecodeText = _("Can't decode text for editing; please specify"
" the document encoding.")
def setUpWidgets(self, ignore_request=False):
ci = mimetype.interfaces.IContentInfo(self.context)
self.have_text = "charset" in ci.effectiveParameters
fields = [self.view_fields]
if self.have_text:
if self.get_rendered_isFragment():
text_field = self.fragment_field
else:
text_field = self.document_field
fields.append(text_field)
if ci.effectiveParameters.get("charset") not in UNIVERSAL_CHARSETS:
fields.append(self.reencode_field)
else:
if not self.status:
self.status = self.msgCannotDecodeText
fields.append(self.encoding_field)
self.form_fields = zope.formlib.form.Fields(*fields)
super(BaseEditingView, self).setUpWidgets(
ignore_request=ignore_request)
def save_validator(self, action, data):
errs = self.validate(None, data)
if not self.have_text:
ifaces = zope.interface.providedBy(
zope.security.proxy.removeSecurityProxy(self.context))
for iface in ifaces:
if mimetype.interfaces.IContentTypeInterface.providedBy(iface):
break
else:
# Should never happen!
assert False, "this view has been mis-registered!"
errs += zope.file.contenttype.validateCodecUse(
self.context, iface, data.get("encoding"),
self.encoding_field)
return errs
@zope.formlib.form.action(_("Save"), validator=save_validator)
def save(self, action, data):
changed = False
context = self.context
if self.have_text:
changed = self.handle_text_update(data)
else:
# maybe we have a new encoding?
codec = data["encoding"]
if codec is None:
self.status = self.msgCannotDecodeText
else:
if "charset" in context.parameters:
old_codec = zope.component.queryUtility(
mimetype.interfaces.ICharsetCodec,
context.parameters["charset"])
else:
old_codec = None
if getattr(old_codec, "name", None) != codec.name:
# use the preferred charset for the new codec
new_charset = zope.component.getUtility(
mimetype.interfaces.ICodecPreferredCharset,
codec.name)
parameters = dict(context.parameters)
parameters["charset"] = new_charset.name
context.parameters = parameters
changed = True
# Deal with the isFragment flag:
info = zope.html.interfaces.IEditableHtmlInformation(context)
isFragment = data["isFragment"]
if isFragment != info.isFragment:
info.isFragment = data["isFragment"]
changed = True
# Set the status message:
if changed:
# Should this get done if only the isFragment changed?
zope.event.notify(
zope.lifecycleevent.ObjectModifiedEvent(context))
formatter = self.request.locale.dates.getFormatter(
'dateTime', 'medium')
now = datetime.datetime.now(idatetime.ITZInfo(self.request))
self.status = _("Updated on ${date_time}",
mapping={'date_time': formatter.format(now)})
elif not self.status:
self.status = _('No changes')
def handle_text_update(self, data):
text = data["text"]
if text != get_rendered_text(self):
ci = mimetype.interfaces.IContentInfo(self.context)
codec = ci.getCodec()
try:
textdata, consumed = codec.encode(text)
if consumed != len(text):
# XXX borked!
pass
except:
# The old encoding will no longer support the data, so
# switch to UTF-8:
if data.get("reencode"):
textdata = text.encode("utf-8")
parameters = dict(self.context.parameters)
parameters["charset"] = "utf-8"
self.context.parameters = parameters
else:
encoding = ci.effectiveParameters["charset"]
self.status = _(
"Can't encode text in current encoding (${encoding})"
"; check 'Re-encode' to enable conversion to UTF-8.",
mapping={"encoding": encoding})
self.form_reset = False
return False
# need to discard re-encode checkbox
f = self.context.open("w")
f.write(textdata)
f.close()
return True
class HtmlEditingView(BaseEditingView):
"""Editing view for HTML content."""
document_field = zope.formlib.form.Field(
zope.html.field.HtmlDocument(
__name__="text",
title=_("Text"),
description=_("Text of the document being edited."),
)
)
document_field.get_rendered = get_rendered_text
fragment_field = zope.formlib.form.Field(
zope.html.field.HtmlFragment(
__name__="text",
title=_("Text"),
description=_("Text of the fragment being edited."),
)
)
fragment_field.get_rendered = get_rendered_text
class XhtmlEditingView(BaseEditingView):
"""Editing view for XHTML content."""
document_field = zope.formlib.form.Field(
zope.html.field.XhtmlDocument(
__name__="text",
title=_("Text"),
description=_("Text of the document being edited."),
)
)
document_field.get_rendered = get_rendered_text
fragment_field = zope.formlib.form.Field(
zope.html.field.XhtmlFragment(
__name__="text",
title=_("Text"),
description=_("Text of the fragment being edited."),
)
)
fragment_field.get_rendered = get_rendered_text
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