blob: 940017149b94f22503111e32ba7c4bf60040157f [file] [log] [blame]
#
# The goal is to finally have a form filler where you pass data for
# each form, using the algorithm for "Seeding a form with initial values"
# See http://www.whatwg.org/specs/web-forms/current-work/#seeding
#
import _base
from html5lib.constants import spaceCharacters
spaceCharacters = u"".join(spaceCharacters)
class SimpleFilter(_base.Filter):
def __init__(self, source, fieldStorage):
_base.Filter.__init__(self, source)
self.fieldStorage = fieldStorage
def __iter__(self):
field_indices = {}
state = None
field_name = None
for token in _base.Filter.__iter__(self):
type = token["type"]
if type in ("StartTag", "EmptyTag"):
name = token["name"].lower()
if name == "input":
field_name = None
field_type = None
input_value_index = -1
input_checked_index = -1
for i,(n,v) in enumerate(token["data"]):
n = n.lower()
if n == u"name":
field_name = v.strip(spaceCharacters)
elif n == u"type":
field_type = v.strip(spaceCharacters)
elif n == u"checked":
input_checked_index = i
elif n == u"value":
input_value_index = i
value_list = self.fieldStorage.getlist(field_name)
field_index = field_indices.setdefault(field_name, 0)
if field_index < len(value_list):
value = value_list[field_index]
else:
value = ""
if field_type in (u"checkbox", u"radio"):
if value_list:
if token["data"][input_value_index][1] == value:
if input_checked_index < 0:
token["data"].append((u"checked", u""))
field_indices[field_name] = field_index + 1
elif input_checked_index >= 0:
del token["data"][input_checked_index]
elif field_type not in (u"button", u"submit", u"reset"):
if input_value_index >= 0:
token["data"][input_value_index] = (u"value", value)
else:
token["data"].append((u"value", value))
field_indices[field_name] = field_index + 1
field_type = None
field_name = None
elif name == "textarea":
field_type = "textarea"
field_name = dict((token["data"])[::-1])["name"]
elif name == "select":
field_type = "select"
attributes = dict(token["data"][::-1])
field_name = attributes.get("name")
is_select_multiple = "multiple" in attributes
is_selected_option_found = False
elif field_type == "select" and field_name and name == "option":
option_selected_index = -1
option_value = None
for i,(n,v) in enumerate(token["data"]):
n = n.lower()
if n == "selected":
option_selected_index = i
elif n == "value":
option_value = v.strip(spaceCharacters)
if option_value is None:
raise NotImplementedError("<option>s without a value= attribute")
else:
value_list = self.fieldStorage.getlist(field_name)
if value_list:
field_index = field_indices.setdefault(field_name, 0)
if field_index < len(value_list):
value = value_list[field_index]
else:
value = ""
if (is_select_multiple or not is_selected_option_found) and option_value == value:
if option_selected_index < 0:
token["data"].append((u"selected", u""))
field_indices[field_name] = field_index + 1
is_selected_option_found = True
elif option_selected_index >= 0:
del token["data"][option_selected_index]
elif field_type is not None and field_name and type == "EndTag":
name = token["name"].lower()
if name == field_type:
if name == "textarea":
value_list = self.fieldStorage.getlist(field_name)
if value_list:
field_index = field_indices.setdefault(field_name, 0)
if field_index < len(value_list):
value = value_list[field_index]
else:
value = ""
yield {"type": "Characters", "data": value}
field_indices[field_name] = field_index + 1
field_name = None
elif name == "option" and field_type == "select":
pass # TODO: part of "option without value= attribute" processing
elif field_type == "textarea":
continue # ignore token
yield token