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import re
from ..info import KIND, ParsedItem, FileInfo
class TextInfo:
def __init__(self, text, start=None, end=None):
# immutable:
if not start:
start = 1
self.start = start
# mutable:
lines = text.splitlines() or ['']
self.text = text.strip()
if not end:
end = start + len(lines) - 1
self.end = end
self.line = lines[-1]
def __repr__(self):
args = (f'{a}={getattr(self, a)!r}'
for a in ['text', 'start', 'end'])
return f'{type(self).__name__}({", ".join(args)})'
def add_line(self, line, lno=None):
if lno is None:
lno = self.end + 1
else:
if isinstance(lno, FileInfo):
fileinfo = lno
if fileinfo.filename != self.filename:
raise NotImplementedError((fileinfo, self.filename))
lno = fileinfo.lno
# XXX
#if lno < self.end:
# raise NotImplementedError((lno, self.end))
line = line.lstrip()
self.text += ' ' + line
self.line = line
self.end = lno
class SourceInfo:
_ready = False
def __init__(self, filename, _current=None):
# immutable:
self.filename = filename
# mutable:
if isinstance(_current, str):
_current = TextInfo(_current)
self._current = _current
start = -1
self._start = _current.start if _current else -1
self._nested = []
self._set_ready()
def __repr__(self):
args = (f'{a}={getattr(self, a)!r}'
for a in ['filename', '_current'])
return f'{type(self).__name__}({", ".join(args)})'
@property
def start(self):
if self._current is None:
return self._start
return self._current.start
@property
def end(self):
if self._current is None:
return self._start
return self._current.end
@property
def text(self):
if self._current is None:
return ''
return self._current.text
def nest(self, text, before, start=None):
if self._current is None:
raise Exception('nesting requires active source text')
current = self._current
current.text = before
self._nested.append(current)
self._replace(text, start)
def resume(self, remainder=None):
if not self._nested:
raise Exception('no nested text to resume')
if self._current is None:
raise Exception('un-nesting requires active source text')
if remainder is None:
remainder = self._current.text
self._clear()
self._current = self._nested.pop()
self._current.text += ' ' + remainder
self._set_ready()
def advance(self, remainder, start=None):
if self._current is None:
raise Exception('advancing requires active source text')
if remainder.strip():
self._replace(remainder, start, fixnested=True)
else:
if self._nested:
self._replace('', start, fixnested=True)
#raise Exception('cannot advance while nesting')
else:
self._clear(start)
def resolve(self, kind, data, name, parent=None):
# "field" isn't a top-level kind, so we leave it as-is.
if kind and kind != 'field':
kind = KIND._from_raw(kind)
fileinfo = FileInfo(self.filename, self._start)
return ParsedItem(fileinfo, kind, parent, name, data)
def done(self):
self._set_ready()
def too_much(self, maxtext, maxlines):
if maxtext and len(self.text) > maxtext:
pass
elif maxlines and self.end - self.start > maxlines:
pass
else:
return False
#if re.fullmatch(r'[^;]+\[\][ ]*=[ ]*[{]([ ]*\d+,)*([ ]*\d+,?)\s*',
# self._current.text):
# return False
return True
def _set_ready(self):
if self._current is None:
self._ready = False
else:
self._ready = self._current.text.strip() != ''
def _used(self):
ready = self._ready
self._ready = False
return ready
def _clear(self, start=None):
old = self._current
if self._current is not None:
# XXX Fail if self._current wasn't used up?
if start is None:
start = self._current.end
self._current = None
if start is not None:
self._start = start
self._set_ready()
return old
def _replace(self, text, start=None, *, fixnested=False):
end = self._current.end
old = self._clear(start)
self._current = TextInfo(text, self._start, end)
if fixnested and self._nested and self._nested[-1] is old:
self._nested[-1] = self._current
self._set_ready()
def _add_line(self, line, lno=None):
if not line.strip():
# We don't worry about multi-line string literals.
return
if self._current is None:
self._start = lno
self._current = TextInfo(line, lno)
else:
# XXX
#if lno < self._current.end:
# # A circular include?
# raise NotImplementedError((lno, self))
self._current.add_line(line, lno)
self._ready = True
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