50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
# -*- coding: utf8 -*-
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"""
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.. module:: lesscpy.plib.deferred
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:synopsis: Deferred mixin call.
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Copyright (c)
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See LICENSE for details.
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.. moduleauthor:: Jóhann T. Maríusson <jtm@robot.is>
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"""
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from .node import Node
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class Deferred(Node):
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def __init__(self, mixin, args, lineno=0):
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"""This node represents mixin calls
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within the body of other mixins. The calls
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to these mixins are deferred until the parent
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mixin is called.
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args:
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mixin (Mixin): Mixin object
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args (list): Call arguments
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"""
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self.tokens = [mixin, args]
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self.lineno = lineno
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def parse(self, scope, error=False):
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""" Parse function.
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args:
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scope (Scope): Current scope
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returns:
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mixed
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"""
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mixin, args = self.tokens
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if hasattr(mixin, 'call'):
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return mixin.call(scope, args)
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res = False
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mixins = scope.mixins(mixin.raw())
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if mixins:
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for mixin in mixins:
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res = mixin.call(scope, args)
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if res: break
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if res:
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res = [p.parse(scope) for p in res]
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while(any(t for t in res if type(t) is Deferred)):
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res = [p.parse(scope) for p in res]
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if error and not res:
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raise SyntaxError('NameError `%s`' % mixin.raw(True))
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return res
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