def call(name, args, R, library, is_function=True):
C, O = R.context, R.options
# Function call:
_name = normalize_var(name)
s = args and args.value.items() or []
_args = [v for n, v in s if isinstance(n, int)]
_kwargs = dict((str(n[1:]).replace('-', '_'), v) for n, v in s if not isinstance(n, int) and n != '_')
_fn_a = '%s:%d' % (_name, len(_args))
try:
fn = O and O.get('@function ' + _fn_a)
if fn:
node = fn(R, *_args, **_kwargs)
else:
fn = library.lookup(_name, len(_args))
node = fn(*_args, **_kwargs)
except KeyError:
sp = args and args.value.get('_') or ''
if is_function:
if not _css_functions_re.match(_name):
log.error("Required function not found: %s (%s)", _fn_a, R.file_and_line, extra={'stack': True})
_args = (sp + ' ').join(to_str(v) for n, v in s if isinstance(n, int))
_kwargs = (sp + ' ').join('%s: %s' % (n, to_str(v)) for n, v in s if not isinstance(n, int) and n != '_')
if _args and _kwargs:
_args += (sp + ' ')
# Function not found, simply write it as a string:
node = StringValue(name + '(' + _args + _kwargs + ')')
else:
node = StringValue((sp + ' ').join(str(v) for n, v in s if n != '_'))
return node
def interpolate(var, rule, library):
value = rule.context.get(normalize_var(var), var)
if var != value and isinstance(value, basestring):
_vi = eval_expr(value, rule, library, True)
if _vi is not None:
value = _vi
return value
def evaluate(self, calculator, divide=False):
# TODO bake this into the context and options "dicts", plus library
func_name = normalize_var(self.func_name)
argspec_node = self.argspec
# Turn the pairs of arg tuples into *args and **kwargs
# TODO unclear whether this is correct -- how does arg, kwarg, arg
# work?
args, kwargs = argspec_node.evaluate_call_args(calculator)
argspec_len = len(args) + len(kwargs)
# Translate variable names to Python identifiers
# TODO what about duplicate kw names? should this happen in argspec?
# how does that affect mixins?
kwargs = dict((key.lstrip('$').replace('-', '_'), value)
for key, value in kwargs.items())
# TODO merge this with the library
funct = None
try:
funct = calculator.namespace.function(func_name, argspec_len)
# @functions take a ns as first arg. TODO: Python functions possibly
# should too
if getattr(funct, '__name__', None) == '__call':
funct = partial(funct, calculator.namespace)
except KeyError:
try:
# DEVIATION: Fall back to single parameter
funct = calculator.namespace.function(func_name, 1)
args = [List(args, use_comma=True)]
except KeyError:
if not is_builtin_css_function(func_name):
log.error("Function not found: %s:%s",
func_name,
argspec_len,
extra={'stack': True})
if funct:
ret = funct(*args, **kwargs)
if not isinstance(ret, Value):
raise TypeError("Expected Sass type as return value, got %r" %
(ret, ))
return ret
# No matching function found, so render the computed values as a CSS
# function call. Slurpy arguments are expanded and named arguments are
# unsupported.
if kwargs:
raise TypeError(
"The CSS function %s doesn't support keyword arguments." %
(func_name, ))
# TODO another candidate for a "function call" sass type
rendered_args = [arg.render() for arg in args]
return String(u"%s(%s)" % (func_name, u", ".join(rendered_args)),
quotes=None)
def evaluate(self, calculator, divide=False):
# TODO bake this into the context and options "dicts", plus library
func_name = normalize_var(self.func_name)
argspec_node = self.argspec
# Turn the pairs of arg tuples into *args and **kwargs
# TODO unclear whether this is correct -- how does arg, kwarg, arg
# work?
args, kwargs = argspec_node.evaluate_call_args(calculator)
argspec_len = len(args) + len(kwargs)
# Translate variable names to Python identifiers
# TODO what about duplicate kw names? should this happen in argspec?
# how does that affect mixins?
kwargs = dict(
(key.lstrip('$').replace('-', '_'), value)
for key, value in kwargs.items())
# TODO merge this with the library
funct = None
try:
funct = calculator.namespace.function(func_name, argspec_len)
except KeyError:
try:
# DEVIATION: Fall back to single parameter
funct = calculator.namespace.function(func_name, 1)
args = [List(args, use_comma=True)]
except KeyError:
if not is_builtin_css_function(func_name):
log.error("Function not found: %s:%s", func_name, argspec_len, extra={'stack': True})
if funct:
if getattr(funct, '_pyscss_needs_namespace', False):
# @functions and some Python functions take the namespace as an
# extra first argument
ret = funct(calculator.namespace, *args, **kwargs)
else:
ret = funct(*args, **kwargs)
if not isinstance(ret, Value):
raise TypeError("Expected Sass type as return value, got %r" % (ret,))
return ret
# No matching function found, so render the computed values as a CSS
# function call. Slurpy arguments are expanded and named arguments are
# unsupported.
if kwargs:
raise TypeError("The CSS function %s doesn't support keyword arguments." % (func_name,))
# TODO another candidate for a "function call" sass type
rendered_args = [arg.render() for arg in args]
return String(
"%s(%s)" % (func_name, ", ".join(rendered_args)),
quotes=None)
def evaluate(self, calculator, divide=False):
# TODO bake this into the context and options "dicts", plus library
func_name = normalize_var(self.func_name)
# Turn the pairs of arg tuples into *args and **kwargs
# TODO unclear whether this is correct -- how does arg, kwarg, arg
# work?
args = []
kwargs = {}
evald_argpairs = []
for var, expr in self.argspec.argpairs:
value = expr.evaluate(calculator, divide=True)
evald_argpairs.append((var, value))
if var is None:
args.append(value)
else:
kwargs[var.lstrip('$').replace('-', '_')] = value
num_args = len(self.argspec.argpairs)
# TODO merge this with the library
try:
func = calculator.namespace.function(func_name, num_args)
# @functions take a ns as first arg. TODO: Python functions possibly
# should too
if getattr(func, '__name__', None) == '__call':
func = partial(func, calculator.namespace)
except KeyError:
if not is_builtin_css_function(func_name):
log.error("Function not found: %s:%s",
func_name,
num_args,
extra={'stack': True})
rendered_args = []
for var, value in evald_argpairs:
rendered_value = value.render()
if var is None:
rendered_args.append(rendered_value)
else:
rendered_args.append("%s: %s" % (var, rendered_value))
return String(u"%s(%s)" % (func_name, u", ".join(rendered_args)),
quotes=None)
else:
return func(*args, **kwargs)
def evaluate(self, calculator, divide=False):
# TODO bake this into the context and options "dicts", plus library
name = normalize_var(self.func_name)
# Turn the pairs of arg tuples into *args and **kwargs
# TODO unclear whether this is correct -- how does arg, kwarg, arg
# work?
args = []
kwargs = {}
evald_argpairs = []
for var, expr in self.argspec.argpairs:
value = expr.evaluate(calculator, divide=True)
evald_argpairs.append((var, value))
if var is None:
args.append(value)
else:
kwargs[ var.lstrip('$').replace('-', '_') ] = value
num_args = len(self.argspec.argpairs)
# TODO merge this with the library
try:
func = calculator.namespace.function(self.func_name, num_args)
# @functions take a ns as first arg. TODO: Python functions possibly
# should too
if getattr(func, '__name__', None) == '__call':
func = partial(func, calculator.namespace)
except KeyError:
if not is_builtin_css_function(self.func_name):
# TODO log.warn, log.error, warning, exception?
log.warn("no such function")
rendered_args = []
for var, value in evald_argpairs:
rendered_value = value.render()
if var is None:
rendered_args.append(rendered_value)
else:
rendered_args.append("%s: %s" % (var, rendered_value))
return String(
u"%s(%s)" % (self.func_name, u", ".join(rendered_args)),
quotes=None)
else:
return func(*args, **kwargs)
def eval_expr(expr, rule, library, raw=False):
# print >>sys.stderr, '>>',expr,'<<'
results = None
if not isinstance(expr, basestring):
results = expr
if results is None:
if _variable_re.match(expr):
expr = normalize_var(expr)
if expr in rule.context:
chkd = {}
while expr in rule.context and expr not in chkd:
chkd[expr] = 1
_expr = rule.context[expr]
if _expr == expr:
break
expr = _expr
if not isinstance(expr, basestring):
results = expr
if results is None:
if expr in expr_cache:
results = expr_cache[expr]
else:
try:
P = Calculator(CalculatorScanner(), library)
P.reset(expr)
results = P.goal(rule)
except SyntaxError:
if config.DEBUG:
raise
except Exception, e:
log.exception("Exception raised: %s in `%s' (%s)", e, expr, rule.file_and_line)
if config.DEBUG:
raise
# TODO this is a clumsy hack for nondeterministic functions;
# something better (and per-compiler rather than global) would be
# nice
if '$' not in expr and '(' not in expr:
expr_cache[expr] = results
