def diff(source, target, *interfaces):
"""Get a list of (field, changed, result) 3-tuples, for "diff-able" fields.
"""
if not len(interfaces):
interfaces = interface.providedBy(source)
results = []
for iface in interfaces:
# the order is locked on the order returned by of interface.names()
for name in iface.names():
#!+VERSIONS(miano, 2 may 2012) something changed in the last couple
# of weeks that makes removeSecurityPolicy below required yet
# it wasn't before.
field = removeSecurityProxy(iface[name])
# only consider for diffing fields of this type
#!+VERSIONS(miano, 2 May 2012) This was an isinstance check before.
# switched it to check on interfaces.
if set((schema.interfaces.IText, schema.interfaces.ITextLine,
schema.interfaces.ISet)).isdisjoint(
set(interface.providedBy(field))):
continue
bound = field.bind(source)
source_value = bound.query(source, field.default)
target_value = bound.query(target, field.default)
if source_value is None or target_value is None:
continue
hresult = htmldiff(source_value, target_value)
results.append((field, bool(hresult!=source_value), hresult))
return results
def update(self):
""" Checks if we have Modified errors and renders split view
with display widgets for db values and normal for input
"""
super(DiffEditForm, self).update()
for error in self.errors:
if error.__class__ == Modified:
# Set flag that form is in diff mode
if not self.diff:
self.diff=True
if self.diff:
# Set last timestamp which we store in hidden field because
# document may be modified during diff and from.timestamp field
# contains old value
self.last_timestamp = self.context.timestamp
for widget in self.widgets:
try:
value = widget.getInputValue()
except:
value = ""
# Get widget's field
form_field = self.form_fields.get(widget.context.__name__)
field = form_field.field.bind(self.context)
# Form display widget for our field
if form_field.custom_widget is not None:
display_widget = form_field.custom_widget(
field, self.request)
else:
display_widget = component.getMultiAdapter(
(field, self.request), IDisplayWidget)
# If field is Text or TextLine we display HTML diff
if IText.providedBy(field) or ITextLine.providedBy(field):
if value:
diff_val = htmldiff(field.get(self.context), value)
else:
diff_val = ""
display_widget = component.getMultiAdapter(
(field, self.request), IDiffDisplayWidget)
display_widget.setRenderedValue(diff_val)
else:
display_widget.setRenderedValue(field.get(self.context))
display_widget.name = widget.name + ".diff.display"
# Add display - input widgets pair to list of diff widgets
self.diff_widgets.append((widget, display_widget))
def update(self):
""" Checks if we have Modified errors and renders split view
with display widgets for db values and normal for input
"""
super(DiffEditForm, self).update()
for error in self.errors:
if error.__class__ == Modified:
# Set flag that form is in diff mode
if not self.diff:
self.diff = True
if self.diff:
# Set last timestamp which we store in hidden field because
# document may be modified during diff and from.timestamp field
# contains old value
self.last_timestamp = self.context.timestamp
for widget in self.widgets:
try:
value = widget.getInputValue()
except:
value = ""
# Get widget's field
form_field = self.form_fields.get(widget.context.__name__)
field = form_field.field.bind(self.context)
# Form display widget for our field
if form_field.custom_widget is not None:
display_widget = form_field.custom_widget(
field, self.request)
else:
display_widget = component.getMultiAdapter(
(field, self.request), IDisplayWidget)
# If field is Text or TextLine we display HTML diff
if IText.providedBy(field) or ITextLine.providedBy(field):
if value:
diff_val = htmldiff(field.get(self.context), value)
else:
diff_val = ""
display_widget = component.getMultiAdapter(
(field, self.request), IDiffDisplayWidget)
display_widget.setRenderedValue(diff_val)
else:
display_widget.setRenderedValue(field.get(self.context))
display_widget.name = widget.name + ".diff.display"
# Add display - input widgets pair to list of diff widgets
self.diff_widgets.append((widget, display_widget))