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64 lines
1.8 KiB
Python
64 lines
1.8 KiB
Python
# Copyright 2018 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import functools
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import operator as op
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from . import traceback_util
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traceback_util.register_exclusion(__file__)
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class PrettyPrint:
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"""Crude Hughes-inspired pretty printer."""
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def __init__(self, lines):
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self.lines = lines
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def indent(self, indent):
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return PrettyPrint([(indent + orig_indent, s)
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for orig_indent, s in self.lines])
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def annotate(self, length, msg):
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(i, s), *rest = self.lines
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return PrettyPrint([(i, s.ljust(length) + f" [{msg}]")] + list(rest))
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def __add__(self, rhs):
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return PrettyPrint(self.lines + rhs.lines)
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def __rshift__(self, rhs):
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if not rhs.lines:
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return self
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if not self.lines:
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return rhs
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indent, s = self.lines[-1]
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indented_block = rhs.indent(indent + len(s))
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common_line = s + ' ' * rhs.lines[0][0] + rhs.lines[0][1]
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return PrettyPrint(self.lines[:-1]
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+ [(indent, common_line)]
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+ indented_block.lines[1:])
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def __str__(self):
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return '\n'.join(' ' * indent + s for indent, s in self.lines)
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def pp(s):
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return PrettyPrint([(0, line) for line in str(s).splitlines()])
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def hcat(ps):
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return functools.reduce(op.rshift, ps)
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def vcat(ps):
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return sum(ps, pp(''))
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