124 lines
3.6 KiB
Python
124 lines
3.6 KiB
Python
from typing import List, TextIO, Optional, Tuple, Dict
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from pathlib import Path
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from .pytex_formatter import PyTeXFormatter
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from .macros import Macro
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class LineStream:
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def __init__(self, filename: Path):
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self._file = filename
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self._handle = open(filename, 'r')
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self._cached_lines: List[str] = []
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self._file_exhausted: bool = False
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def current_line(self):
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return self.future_line(0)
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def set_line(self, line):
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self.set_future_line(0, line)
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def pop_line(self) -> str:
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self.reserve_lines(1)
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line = self._cached_lines[0]
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self._cached_lines = self._cached_lines[1:]
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return line
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def push_line(self, line):
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self.push_lines([line])
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def push_lines(self, lines: List[str]):
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self._cached_lines = lines + self._cached_lines
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def future_line(self, pos: int):
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self.reserve_lines(pos + 1)
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return self._cached_lines[pos]
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def set_future_line(self, line, pos):
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self.reserve_lines(pos + 1)
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self._cached_lines[pos] = line
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def reserve_lines(self, num_lines):
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for i in range(0, num_lines - len(self._cached_lines) -1):
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self._cached_lines.append(
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self._handle.readline()
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)
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if self._cached_lines[-1] == '':
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self._handle.close()
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self._file_exhausted = True
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@property
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def exhausted(self) -> bool:
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return self._file_exhausted & len(self._cached_lines) == 0
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class TexFormatter(PyTeXFormatter):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self._macros: List[Macro] = []
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self._line_stream: LineStream = None
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self._output_file: TextIO = None
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@property
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def line_stream(self) -> LineStream:
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if self._line_stream is None:
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self._line_stream = LineStream(self.input_file)
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return self._line_stream
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@property
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def macros(self) -> List[Macro]:
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return self._macros
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def _handle_macro(self, macro: Macro):
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res = macro.apply(
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self.line_stream.current_line(),
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self
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)
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if isinstance(res, str):
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self.line_stream.set_line(res)
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else:
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self.line_stream.pop_line()
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self.line_stream.push_lines(res)
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def _shipout_line(self):
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line = self.line_stream.pop_line().rstrip()
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self.write_line(line)
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def write_line(self, line: str):
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self._output_file.write(line)
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def open_output_stream(self):
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raise NotImplementedError
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@property
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def future_config(self) -> Optional[List[Tuple[str, Dict]]]:
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raise NotImplementedError
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def format_pre_header(self) -> None:
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pass
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def format_header(self):
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self._output_file.write(self.make_header())
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def format_post_header(self) -> None:
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pass
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def format_document(self) -> None:
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while not self.line_stream.exhausted:
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recent_replacement = True
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while recent_replacement:
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recent_replacement = False
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for macro in self.macros:
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if macro.matches(self.line_stream.current_line()):
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self._handle_macro(macro)
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recent_replacement = True
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break
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self._shipout_line()
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def format(self, build_dir: Path, overwrite: bool = False) -> Optional[List[Tuple[str, Dict]]]:
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self.open_output_stream()
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self.format_pre_header()
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self.format_header()
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self.format_post_header()
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self.format_document()
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self._output_file.close()
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return self.future_config
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