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#Copyright ReportLab Europe Ltd. 2000-2017 #see license.txt for license details #history https://hg.reportlab.com/hg-public/reportlab/log/tip/src/reportlab/lib/validators.py __version__='3.5.33' __doc__="""Standard verifying functions used by attrmap.""" import sys, codecs from reportlab.lib.utils import isSeq, isBytes, isStr, isPy3 from reportlab.lib import colors from reportlab import ascii class Percentage(float): pass class Validator: "base validator class" def __call__(self,x): return self.test(x) def __str__(self): return getattr(self,'_str',self.__class__.__name__) def normalize(self,x): return x def normalizeTest(self,x): try: self.normalize(x) return True except: return False class _isAnything(Validator): def test(self,x): return True class _isNothing(Validator): def test(self,x): return False class _isBoolean(Validator): def test(self,x): if isinstance(int,bool): return x in (0,1) return self.normalizeTest(x) def normalize(self,x): if x in (0,1): return x try: S = x.upper() except: raise ValueError('Must be boolean not %s' % ascii(s)) if S in ('YES','TRUE'): return True if S in ('NO','FALSE',None): return False raise ValueError('Must be boolean not %s' % ascii(s)) class _isString(Validator): def test(self,x): return isStr(x) class _isCodec(Validator): def test(self,x): if not isStr(x): return False try: a,b,c,d = codecs.lookup(x) return True except LookupError: return False class _isNumber(Validator): def test(self,x): if isinstance(x,(float,int)): return True return self.normalizeTest(x) def normalize(self,x): try: return float(x) except: return int(x) class _isInt(Validator): def test(self,x): if not isinstance(x,int) and not isStr(x): return False return self.normalizeTest(x) if not isPy3: def normalize(self,x): return int(x) else: def normalize(self,x): return int(x.decode('utf8') if isBytes(x) else x) class _isNumberOrNone(_isNumber): def test(self,x): return x is None or isNumber(x) def normalize(self,x): if x is None: return x return _isNumber.normalize(x) class _isListOfNumbersOrNone(Validator): "ListOfNumbersOrNone validator class." def test(self, x): if x is None: return True return isListOfNumbers(x) class isNumberInRange(_isNumber): def __init__(self, min, max): self.min = min self.max = max def test(self, x): try: n = self.normalize(x) if self.min <= n <= self.max: return True except ValueError: pass return False class _isListOfShapes(Validator): "ListOfShapes validator class." def test(self, x): from reportlab.graphics.shapes import Shape if isSeq(x): answer = 1 for e in x: if not isinstance(e, Shape): answer = 0 return answer else: return False class _isListOfStringsOrNone(Validator): "ListOfStringsOrNone validator class." def test(self, x): if x is None: return True return isListOfStrings(x) class _isTransform(Validator): "Transform validator class." def test(self, x): if isSeq(x): if len(x) == 6: for element in x: if not isNumber(element): return False return True else: return False else: return False class _isColor(Validator): "Color validator class." def test(self, x): return isinstance(x, colors.Color) class _isColorOrNone(Validator): "ColorOrNone validator class." def test(self, x): if x is None: return True return isColor(x) from reportlab.lib.normalDate import NormalDate class _isNormalDate(Validator): def test(self,x): if isinstance(x,NormalDate): return True return x is not None and self.normalizeTest(x) def normalize(self,x): return NormalDate(x) class _isValidChild(Validator): "ValidChild validator class." def test(self, x): """Is this child allowed in a drawing or group? I.e. does it descend from Shape or UserNode? """ from reportlab.graphics.shapes import UserNode, Shape return isinstance(x, UserNode) or isinstance(x, Shape) class _isValidChildOrNone(_isValidChild): def test(self,x): return _isValidChild.test(self,x) or x is None class _isCallable(Validator): def test(self, x): return hasattr(x,'__call__') class OneOf(Validator): """Make validator functions for list of choices. Usage: f = reportlab.lib.validators.OneOf('happy','sad') or f = reportlab.lib.validators.OneOf(('happy','sad')) f('sad'),f('happy'), f('grumpy') (1,1,0) """ def __init__(self, enum,*args): if isSeq(enum): if args!=(): raise ValueError("Either all singleton args or a single sequence argument") self._enum = tuple(enum)+args else: self._enum = (enum,)+args def test(self, x): return x in self._enum class SequenceOf(Validator): def __init__(self,elemTest,name=None,emptyOK=1, NoneOK=0, lo=0,hi=0x7fffffff): self._elemTest = elemTest self._emptyOK = emptyOK self._NoneOK = NoneOK self._lo, self._hi = lo, hi if name: self._str = name def test(self, x): if not isSeq(x): if x is None: return self._NoneOK return False if x==[] or x==(): return self._emptyOK elif not self._lo<=len(x)<=self._hi: return False for e in x: if not self._elemTest(e): return False return True class EitherOr(Validator): def __init__(self,tests,name=None): if not isSeq(tests): tests = (tests,) self._tests = tests if name: self._str = name def test(self, x): for t in self._tests: if t(x): return True return False class NoneOr(Validator): def __init__(self,elemTest,name=None): self._elemTest = elemTest if name: self._str = name def test(self, x): if x is None: return True return self._elemTest(x) class NotSetOr(NoneOr): _not_set = object() def test(self, x): if x is NotSetOr._not_set: return True return self._elemTest(x) @staticmethod def conditionalValue(v,a): return a if v is NotSetOr._not_set else v class _isNotSet(Validator): def test(self,x): return x is NotSetOr._not_set class Auto(Validator): def __init__(self,**kw): self.__dict__.update(kw) def test(self,x): return x is self.__class__ or isinstance(x,self.__class__) class AutoOr(NoneOr): def test(self,x): return isAuto(x) or self._elemTest(x) class isInstanceOf(Validator): def __init__(self,klass=None): self._klass = klass def test(self,x): return isinstance(x,self._klass) class isSubclassOf(Validator): def __init__(self,klass=None): self._klass = klass def test(self,x): return issubclass(x,self._klass) class matchesPattern(Validator): """Matches value, or its string representation, against regex""" def __init__(self, pattern): self._pattern = re.compile(pattern) def test(self,x): x = str(x) print('testing %s against %s' % (x, self._pattern)) return (self._pattern.match(x) != None) class DerivedValue: """This is used for magic values which work themselves out. An example would be an "inherit" property, so that one can have drawing.chart.categoryAxis.labels.fontName = inherit and pick up the value from the top of the drawing. Validators will permit this provided that a value can be pulled in which satisfies it. And the renderer will have special knowledge of these so they can evaluate themselves. """ def getValue(self, renderer, attr): """Override this. The renderers will pass the renderer, and the attribute name. Algorithms can then backtrack up through all the stuff the renderer provides, including a correct stack of parent nodes.""" return None class Inherit(DerivedValue): def __repr__(self): return "inherit" def getValue(self, renderer, attr): return renderer.getStateValue(attr) inherit = Inherit() class NumericAlign(str): '''for creating the numeric string value for anchors etc etc dp is the character to align on (the last occurrence will be used) dpLen is the length of characters after the dp ''' def __new__(cls,dp='.',dpLen=0): self = str.__new__(cls,'numeric') self._dp=dp self._dpLen = dpLen return self isAuto = Auto() isBoolean = _isBoolean() isString = _isString() isCodec = _isCodec() isNumber = _isNumber() isInt = _isInt() isNoneOrInt = NoneOr(isInt,'isNoneOrInt') isNumberOrNone = _isNumberOrNone() isTextAnchor = OneOf('start','middle','end','boxauto') isListOfNumbers = SequenceOf(isNumber,'isListOfNumbers') isListOfNoneOrNumber = SequenceOf(isNumberOrNone,'isListOfNoneOrNumber') isListOfListOfNoneOrNumber = SequenceOf(isListOfNoneOrNumber,'isListOfListOfNoneOrNumber') isListOfNumbersOrNone = _isListOfNumbersOrNone() isListOfShapes = _isListOfShapes() isListOfStrings = SequenceOf(isString,'isListOfStrings') isListOfStringsOrNone = _isListOfStringsOrNone() isTransform = _isTransform() isColor = _isColor() isListOfColors = SequenceOf(isColor,'isListOfColors') isColorOrNone = _isColorOrNone() isShape = isValidChild = _isValidChild() isNoneOrShape = isValidChildOrNone = _isValidChildOrNone() isAnything = _isAnything() isNothing = _isNothing() isXYCoord = SequenceOf(isNumber,lo=2,hi=2,emptyOK=0) isBoxAnchor = OneOf('nw','n','ne','w','c','e','sw','s','se', 'autox', 'autoy') isNoneOrString = NoneOr(isString,'NoneOrString') isNoneOrListOfNoneOrStrings=SequenceOf(isNoneOrString,'isNoneOrListOfNoneOrStrings',NoneOK=1) isListOfNoneOrString=SequenceOf(isNoneOrString,'isListOfNoneOrString',NoneOK=0) isNoneOrListOfNoneOrNumbers=SequenceOf(isNumberOrNone,'isNoneOrListOfNoneOrNumbers',NoneOK=1) isCallable = _isCallable() isNoneOrCallable = NoneOr(isCallable) isStringOrCallable=EitherOr((isString,isCallable),'isStringOrCallable') isStringOrCallableOrNone=NoneOr(isStringOrCallable,'isStringOrCallableNone') isStringOrNone=NoneOr(isString,'isStringOrNone') isNormalDate=_isNormalDate() isNotSet=_isNotSet()