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92 lines
2.3 KiB
Python
92 lines
2.3 KiB
Python
"""Migrate signals from old style to new style
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"""
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# Author: Juergen E. Fischer
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# .connect( sender, signal, receiver, slot )
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import re
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# Local imports
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from lib2to3 import fixer_base, pytree
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from lib2to3.fixer_util import ArgList, Attr, Call, Name, Node, syms
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class FixSignals(fixer_base.BaseFix):
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PATTERN = """
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(
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power<
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any trailer< '.' method=('connect'|'disconnect') >
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trailer<
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'('
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arglist<
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sender=any ','
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power< 'SIGNAL' trailer< '(' signal=any ')' > > ','
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slot=any
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>
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')'
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>
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>
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power<
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emitter=any trailer< '.' 'emit' >
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trailer<
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'('
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args=arglist<
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power< 'SIGNAL' trailer< '(' signal=any ')' > >
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( ',' any )*
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>
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')'
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>
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>
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power<
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emitter=any trailer< '.' 'emit' >
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trailer<
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'('
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args=power< 'SIGNAL' trailer< '(' signal=any ')' > >
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')'
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>
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>
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)
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"""
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# def match(self, node):
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# res = super(FixSignals, self).match( node )
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# r = repr(node)
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# if "emit" in r:
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# print "yes" if res else "no", ": ", r
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# return res
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def transform(self, node, results):
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signal = results.get("signal").value
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signal = re.sub("^[\"']([^(]+)(?:\\(.*\\))?[\"']$", "\\1", signal)
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if "emitter" in results:
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emitter = results.get("emitter").clone()
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emitter.prefix = node.prefix
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args = results.get("args").clone()
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args.children = args.children[2:]
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if args.children:
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args.children[0].prefix = ""
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res = Node(
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syms.power,
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[emitter, Name("."), Name(signal), Name("."), Name("emit")]
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+ [ArgList([args])],
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)
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else:
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sender = results.get("sender").clone()
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method = results.get("method")
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if isinstance(method, list):
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method = method[0]
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method = method.clone()
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sender.prefix = node.prefix
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slot = results.get("slot").clone()
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slot.prefix = ""
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res = Node(
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syms.power,
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[sender, Name("."), Name(signal), Name("."), method]
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+ [ArgList([slot])],
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)
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return res
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