def base_convert(num, base, width=None, evaluator=None):
if isinstance(num, Expression):
num = unwrap(num).nodes[0]
if isinstance(base, Expression):
base = unwrap(base).nodes[0]
if width and isinstance(width, Expression):
width = unwrap(width).nodes[0]
assert_type(num, "unit")
assert_type(base, "unit")
if width:
assert_type(width, "unit")
if width:
width = width.value
else:
width = 2
num = int(num.value)
base = int(base.value)
result = _convert(num, base)
while len(result) < width:
result = "0" + result
return Literal(result)
def p(*args, evaluator=None):
for arg in args:
expr = unwrap(arg)
if not expr:
return None
e = str(expr)
if e.startswith("("):
e = e[1:]
if e.endswith(")"):
e = e[:-1]
print(f"inspect: {e}")
return null
def lookup(self, name):
"""
Lookup `name`, with support for JavaScript functions, and BIFs.
:param name:
:return:
"""
if self.ignore_colors and name in colors:
return
val = self.stack.lookup(name)
if val is not None: # fixme: implement __len__()
return utils.unwrap(val)
else:
return self.lookup_function(name)
def add_property(name, expr, evaluator=None):
assert_type(name, "expression", "name")
name = unwrap(name).first()
assert_string(name, "name")
assert_type(expr, "expression", "expr")
prop = Property([name], expr)
block = evaluator.closest_block()
head = block.nodes[0:block.index]
tail = block.nodes[block.index:len(block.nodes)]
block.index += 1
block.mixin = True # this is a dirty hack
head.append(prop)
head.extend(tail)
block.nodes = head
return prop
def s(fmt, *args, evaluator=None):
options = evaluator.options if evaluator else {}
fmt = unwrap(fmt).nodes[0]
assert_string(fmt, "string")
result = fmt.string
results = []
for arg in args:
from stilus.visitor.evaluator import Evaluator
if not isinstance(arg, Evaluator):
results.append(Compiler(arg, options).compile())
for r in results:
result = result.replace("%s", r, 1)
# add nulls for missed %s elements
c = Compiler(null, options).compile()
result = result.replace("%s", c)
return Literal(result)
def opposite_position(positions, evaluator=None):
expr = []
nodes = utils.unwrap(positions)
for i, node in enumerate(nodes):
utils.assert_string(node, f"position {i}")
if node.string == "top":
expr.append(Literal("bottom"))
elif node.string == "bottom":
expr.append(Literal("top"))
elif node.string == "left":
expr.append(Literal("right"))
elif node.string == "right":
expr.append(Literal("left"))
elif node.string == "center":
expr.append(Literal("center"))
else:
raise StilusError(f"invalid position {i}")
return expr
def visit_each(self, each):
self.result += 1
expr = utils.unwrap(self.visit(each.expr))
length = len(expr.nodes)
val = Ident(each.value)
key = Ident("__index__")
if each.key:
key = Ident(each.key)
scope = self.get_current_scope()
block = self.get_current_block()
vals = []
self.result -= 1
each.block.scope = False
def visit_body(key, value):
scope.add(value)
scope.add(key)
body = self.visit(each.block.clone())
vals.extend(body.nodes)
# for prop in obj
if length == 1 and "objectnode" == expr.nodes[0].node_name:
obj = expr.nodes[0]
for prop in obj.values:
val.value = String(prop,
lineno=self.parser.lineno,
column=self.parser.column)
key.value = obj.get(prop) # checkme: works?
visit_body(key, val)
else:
for i, n in enumerate(expr.nodes):
val.value = n
key.value = Unit(i)
visit_body(key, val)
self.mixin(vals, block)
if vals and len(vals) > 0:
return vals[len(vals) - 1]
else:
return null
def slice(values, start, end=None, evaluator=None):
start = int(start.nodes[0].value)
if end and len(end.nodes) > 0:
end = int(end.nodes[0].value)
values = utils.unwrap(values).nodes
if len(values) > 1:
if end:
return utils.coerce(values[start:end], raw=True)
else:
return utils.coerce(values[start:], raw=True)
if end:
result = values[0].string[start:end]
else:
result = values[0].string[start:]
if isinstance(values[0], Ident):
return Ident(result)
else:
return String(result)
def selector(*args, evaluator=None):
stack = evaluator.selector_stack()
if len(args) == 1:
expr = unwrap(args[0])
length = len(expr.nodes)
# selector .a
if length == 1:
assert_string(expr.first(), "selector")
value = expr.first().string
parsed = SelectorParser(value).parse()["value"]
if parsed == value:
return value
stack.append(parse(value))
elif length > 1:
# selector-list = '.a', '.b', '.c'
# selector(selector-list)
if expr.is_list:
push_to_stack(expr.nodes, stack)
# selector('.a' '.b' '.c')
else:
joined = " ".join([node.string for node in expr.nodes])
stack.append(parse(joined))
# selector('.a', '.b', '.c')
elif len(args) > 1:
push_to_stack(args, stack)
if stack:
return ",".join(compile_selectors(stack))
else:
return "&"
def visit_property(self, prop):
name = self.interpolate(prop)
fn = self.lookup(name)
call = fn and "function" == fn.first().node_name
literal = name in self.calling
_prop = self.property
prop_lit = True if hasattr(prop, "literal") and prop.literal else False
if call and not literal and not prop_lit:
# function of the same node_name
clone = prop.expr.clone(None, None)
args = Arguments.from_expression(utils.unwrap(clone))
prop.name = name
self.property = prop
self.result += 1
self.property.expr = self.visit(prop.expr)
self.result -= 1
ret = self.visit(
Call(
name,
args,
lineno=self.parser.lineno,
column=self.parser.column,
))
self.property = _prop
return ret
else:
# regular property
self.result += 1
prop.name = name
prop.literal = True
self.property = prop
prop.expr = self.visit(prop.expr)
self.property = _prop
self.result -= 1
return prop
def list_separator(list, evaluator=None):
list = unwrap(list)
return String("," if list.is_list else " ")
def unshift(expr, *args, evaluator=None):
expr = unwrap(expr)
for arg in args:
a = unwrap(arg)
expr.nodes.insert(0, a)
return len(expr.nodes)
def test_unwrap_no_expression():
assert utils.unwrap(true) == true
assert utils.unwrap(Unit(50, "mm")) == Unit(50, "mm")
def operate( # noqa: C901
self, op: str, right: Type["Node"], value=None
) -> "Node":
"""Operate on ``right`` with the given ``op``."""
from .boolean import Boolean
if op == "is a":
if "string" == right.first().node_name:
return Boolean(self.node_name == right.value)
else:
raise Exception(
f'"is a" expects a string, ' f"got {right.toString}"
)
elif op == "==":
from stilus import utils
if utils.is_number(self) and utils.is_number(right):
return Boolean(utils.get_value(self) == utils.get_value(right))
return Boolean(self.hash() == right.hash())
elif op == "!=":
return Boolean(self.hash() != right.hash())
elif op == ">=":
return Boolean(self.hash() >= right.hash())
elif op == "<=":
return Boolean(self.hash() <= right.hash())
elif op == ">":
if self.one_is_unit(right):
return Boolean(float(self.hash()) > float(right.hash()))
return Boolean(self.hash() > right.hash())
elif op == "<":
return Boolean(self.hash() < right.hash())
elif op == "||":
return self if self.to_boolean().value is True else right
elif op == "in":
from stilus import utils
values = utils.unwrap(right).nodes
if not values:
raise StilusError(
'"in" given invalid right-hand operand, '
"expecting an expression"
)
# 'prop' in object
if len(values) == 1 and values[0].node_name == "objectnode":
return Boolean(values[0].has(self.hash()))
for value in values:
if str(value.hash()) == str(self.hash()):
return Boolean(True)
return Boolean(False)
elif op == "&&":
a = self.to_boolean()
b = right.to_boolean()
if a.value is True and b.value is True:
return right
elif a.value is False:
return self
return right
elif op == "[]":
raise StilusError(f"cannot perform {self}[{right}]")
else:
raise StilusError(f"cannot perform {self} {op} {right}")
def push(expr, *args, evaluator=None):
expr = unwrap(expr)
if evaluator:
for arg in args:
expr.nodes.append(unwrap(arg).clone())
return len(expr.nodes)
