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# encoding: utf-8
"""
Simple type classes, providing validation and format translation for values
stored in XML element attributes. Naming generally corresponds to the simple
type in the associated XML schema.
"""
from __future__ import absolute_import, print_function
from ..exceptions import InvalidXmlError
from ..shared import Emu, Twips
class BaseSimpleType(object):
@classmethod
def from_xml(cls, str_value):
return cls.convert_from_xml(str_value)
@classmethod
def to_xml(cls, value):
cls.validate(value)
str_value = cls.convert_to_xml(value)
return str_value
@classmethod
def validate_int(cls, value):
if not isinstance(value, int):
raise TypeError(
"value must be <type 'int'>, got %s" % type(value)
)
@classmethod
def validate_int_in_range(cls, value, min_inclusive, max_inclusive):
cls.validate_int(value)
if value < min_inclusive or value > max_inclusive:
raise ValueError(
"value must be in range %d to %d inclusive, got %d" %
(min_inclusive, max_inclusive, value)
)
@classmethod
def validate_string(cls, value):
if isinstance(value, str):
return value
try:
if isinstance(value, basestring):
return value
except NameError: # means we're on Python 3
pass
raise TypeError(
"value must be a string, got %s" % type(value)
)
class BaseIntType(BaseSimpleType):
@classmethod
def convert_from_xml(cls, str_value):
return int(str_value)
@classmethod
def convert_to_xml(cls, value):
return str(value)
@classmethod
def validate(cls, value):
cls.validate_int(value)
class BaseStringType(BaseSimpleType):
@classmethod
def convert_from_xml(cls, str_value):
return str_value
@classmethod
def convert_to_xml(cls, value):
return value
@classmethod
def validate(cls, value):
cls.validate_string(value)
class BaseStringEnumerationType(BaseStringType):
@classmethod
def validate(cls, value):
cls.validate_string(value)
if value not in cls._members:
raise ValueError(
"must be one of %s, got '%s'" % (cls._members, value)
)
class XsdAnyUri(BaseStringType):
"""
There's a regular expression this is supposed to meet but so far thinking
spending cycles on validating wouldn't be worth it for the number of
programming errors it would catch.
"""
class XsdBoolean(BaseSimpleType):
@classmethod
def convert_from_xml(cls, str_value):
if str_value not in ('1', '0', 'true', 'false'):
raise InvalidXmlError(
"value must be one of '1', '0', 'true' or 'false', got '%s'"
% str_value
)
return str_value in ('1', 'true')
@classmethod
def convert_to_xml(cls, value):
return {True: '1', False: '0'}[value]
@classmethod
def validate(cls, value):
if value not in (True, False):
raise TypeError(
"only True or False (and possibly None) may be assigned, got"
" '%s'" % value
)
class XsdId(BaseStringType):
"""
String that must begin with a letter or underscore and cannot contain any
colons. Not fully validated because not used in external API.
"""
pass
class XsdInt(BaseIntType):
@classmethod
def validate(cls, value):
cls.validate_int_in_range(value, -2147483648, 2147483647)
class XsdLong(BaseIntType):
@classmethod
def validate(cls, value):
cls.validate_int_in_range(
value, -9223372036854775808, 9223372036854775807
)
class XsdString(BaseStringType):
pass
class XsdStringEnumeration(BaseStringEnumerationType):
"""
Set of enumerated xsd:string values.
"""
class XsdToken(BaseStringType):
"""
xsd:string with whitespace collapsing, e.g. multiple spaces reduced to
one, leading and trailing space stripped.
"""
pass
class XsdUnsignedInt(BaseIntType):
@classmethod
def validate(cls, value):
cls.validate_int_in_range(value, 0, 4294967295)
class XsdUnsignedLong(BaseIntType):
@classmethod
def validate(cls, value):
cls.validate_int_in_range(value, 0, 18446744073709551615)
class ST_BrClear(XsdString):
@classmethod
def validate(cls, value):
cls.validate_string(value)
valid_values = ('none', 'left', 'right', 'all')
if value not in valid_values:
raise ValueError(
"must be one of %s, got '%s'" % (valid_values, value)
)
class ST_BrType(XsdString):
@classmethod
def validate(cls, value):
cls.validate_string(value)
valid_values = ('page', 'column', 'textWrapping')
if value not in valid_values:
raise ValueError(
"must be one of %s, got '%s'" % (valid_values, value)
)
class ST_Coordinate(BaseIntType):
@classmethod
def convert_from_xml(cls, str_value):
if 'i' in str_value or 'm' in str_value or 'p' in str_value:
return ST_UniversalMeasure.convert_from_xml(str_value)
return Emu(int(str_value))
@classmethod
def validate(cls, value):
ST_CoordinateUnqualified.validate(value)
class ST_CoordinateUnqualified(XsdLong):
@classmethod
def validate(cls, value):
cls.validate_int_in_range(value, -27273042329600, 27273042316900)
class ST_DecimalNumber(XsdInt):
pass
class ST_DrawingElementId(XsdUnsignedInt):
pass
class ST_Merge(XsdStringEnumeration):
"""
Valid values for <w:xMerge val=""> attribute
"""
CONTINUE = 'continue'
RESTART = 'restart'
_members = (CONTINUE, RESTART)
class ST_OnOff(XsdBoolean):
@classmethod
def convert_from_xml(cls, str_value):
if str_value not in ('1', '0', 'true', 'false', 'on', 'off'):
raise InvalidXmlError(
"value must be one of '1', '0', 'true', 'false', 'on', or 'o"
"ff', got '%s'" % str_value
)
return str_value in ('1', 'true', 'on')
class ST_PositiveCoordinate(XsdLong):
@classmethod
def convert_from_xml(cls, str_value):
return Emu(int(str_value))
@classmethod
def validate(cls, value):
cls.validate_int_in_range(value, 0, 27273042316900)
class ST_RelationshipId(XsdString):
pass
class ST_SignedTwipsMeasure(XsdInt):
@classmethod
def convert_from_xml(cls, str_value):
if 'i' in str_value or 'm' in str_value or 'p' in str_value:
return ST_UniversalMeasure.convert_from_xml(str_value)
return Twips(int(str_value))
@classmethod
def convert_to_xml(cls, value):
emu = Emu(value)
twips = emu.twips
return str(twips)
class ST_String(XsdString):
pass
class ST_TblLayoutType(XsdString):
@classmethod
def validate(cls, value):
cls.validate_string(value)
valid_values = ('fixed', 'autofit')
if value not in valid_values:
raise ValueError(
"must be one of %s, got '%s'" % (valid_values, value)
)
class ST_TblWidth(XsdString):
@classmethod
def validate(cls, value):
cls.validate_string(value)
valid_values = ('auto', 'dxa', 'nil', 'pct')
if value not in valid_values:
raise ValueError(
"must be one of %s, got '%s'" % (valid_values, value)
)
class ST_TwipsMeasure(XsdUnsignedLong):
@classmethod
def convert_from_xml(cls, str_value):
if 'i' in str_value or 'm' in str_value or 'p' in str_value:
return ST_UniversalMeasure.convert_from_xml(str_value)
return Twips(int(str_value))
@classmethod
def convert_to_xml(cls, value):
emu = Emu(value)
twips = emu.twips
return str(twips)
class ST_UniversalMeasure(BaseSimpleType):
@classmethod
def convert_from_xml(cls, str_value):
float_part, units_part = str_value[:-2], str_value[-2:]
quantity = float(float_part)
multiplier = {
'mm': 36000, 'cm': 360000, 'in': 914400, 'pt': 12700,
'pc': 152400, 'pi': 152400
}[units_part]
emu_value = Emu(int(round(quantity * multiplier)))
return emu_value