forked from STI/Astroport.ONE
78 lines
2.7 KiB
Python
78 lines
2.7 KiB
Python
import re
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from typing import Optional, Tuple, cast
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from .ast import Location
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from .location import SourceLocation, get_location
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from .source import Source
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__all__ = ["print_location", "print_source_location"]
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def print_location(location: Location) -> str:
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"""Render a helpful description of the location in the GraphQL Source document."""
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return print_source_location(
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location.source, get_location(location.source, location.start)
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)
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_re_newline = re.compile(r"\r\n|[\n\r]")
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def print_source_location(source: Source, source_location: SourceLocation) -> str:
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"""Render a helpful description of the location in the GraphQL Source document."""
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first_line_column_offset = source.location_offset.column - 1
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body = "".rjust(first_line_column_offset) + source.body
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line_index = source_location.line - 1
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line_offset = source.location_offset.line - 1
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line_num = source_location.line + line_offset
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column_offset = first_line_column_offset if source_location.line == 1 else 0
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column_num = source_location.column + column_offset
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location_str = f"{source.name}:{line_num}:{column_num}\n"
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lines = _re_newline.split(body) # works a bit different from splitlines()
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location_line = lines[line_index]
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# Special case for minified documents
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if len(location_line) > 120:
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sub_line_index, sub_line_column_num = divmod(column_num, 80)
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sub_lines = [
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location_line[i : i + 80] for i in range(0, len(location_line), 80)
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]
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return location_str + print_prefixed_lines(
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(f"{line_num} |", sub_lines[0]),
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*[("|", sub_line) for sub_line in sub_lines[1 : sub_line_index + 1]],
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("|", "^".rjust(sub_line_column_num)),
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(
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"|",
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sub_lines[sub_line_index + 1]
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if sub_line_index < len(sub_lines) - 1
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else None,
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),
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)
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return location_str + print_prefixed_lines(
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(f"{line_num - 1} |", lines[line_index - 1] if line_index > 0 else None),
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(f"{line_num} |", location_line),
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("|", "^".rjust(column_num)),
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(
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f"{line_num + 1} |",
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lines[line_index + 1] if line_index < len(lines) - 1 else None,
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),
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)
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def print_prefixed_lines(*lines: Tuple[str, Optional[str]]) -> str:
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"""Print lines specified like this: ("prefix", "string")"""
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existing_lines = [
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cast(Tuple[str, str], line) for line in lines if line[1] is not None
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]
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pad_len = max(len(line[0]) for line in existing_lines)
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return "\n".join(
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prefix.rjust(pad_len) + (" " + line if line else "")
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for prefix, line in existing_lines
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)
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