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# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
# Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
"""Universal report objects and some formatting drivers.
A way to create simple reports using python objects, primarily designed to be
formatted as text and html.
"""
from __future__ import annotations
import sys
from collections.abc import Iterator
from io import StringIO
from typing import TYPE_CHECKING, TextIO
if TYPE_CHECKING:
from pylint.reporters.ureports.nodes import (
BaseLayout,
EvaluationSection,
Paragraph,
Section,
Table,
)
class BaseWriter:
"""Base class for ureport writers."""
def format(
self,
layout: BaseLayout,
stream: TextIO = sys.stdout,
encoding: str | None = None,
) -> None:
"""Format and write the given layout into the stream object.
unicode policy: unicode strings may be found in the layout;
try to call 'stream.write' with it, but give it back encoded using
the given encoding if it fails
"""
if not encoding:
encoding = getattr(stream, "encoding", "UTF-8")
self.encoding = encoding or "UTF-8"
self.out = stream
self.begin_format()
layout.accept(self)
self.end_format()
def format_children(self, layout: EvaluationSection | Paragraph | Section) -> None:
"""Recurse on the layout children and call their accept method
(see the Visitor pattern).
"""
for child in getattr(layout, "children", ()):
child.accept(self)
def writeln(self, string: str = "") -> None:
"""Write a line in the output buffer."""
self.write(string + "\n")
def write(self, string: str) -> None:
"""Write a string in the output buffer."""
self.out.write(string)
def begin_format(self) -> None:
"""Begin to format a layout."""
self.section = 0
def end_format(self) -> None:
"""Finished formatting a layout."""
def get_table_content(self, table: Table) -> list[list[str]]:
"""Trick to get table content without actually writing it.
return an aligned list of lists containing table cells values as string
"""
result: list[list[str]] = [[]]
cols = table.cols
for cell in self.compute_content(table):
if cols == 0:
result.append([])
cols = table.cols
cols -= 1
result[-1].append(cell)
# fill missing cells
result[-1] += [""] * (cols - len(result[-1]))
return result
def compute_content(self, layout: BaseLayout) -> Iterator[str]:
"""Trick to compute the formatting of children layout before actually
writing it.
return an iterator on strings (one for each child element)
"""
# Patch the underlying output stream with a fresh-generated stream,
# which is used to store a temporary representation of a child
# node.
out = self.out
try:
for child in layout.children:
stream = StringIO()
self.out = stream
child.accept(self)
yield stream.getvalue()
finally:
self.out = out
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