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from itertools import zip_longest
from typing import (
Iterator,
Iterable,
List,
Optional,
Union,
overload,
TypeVar,
TYPE_CHECKING,
)
if TYPE_CHECKING:
from .console import (
Console,
ConsoleOptions,
JustifyMethod,
OverflowMethod,
RenderResult,
RenderableType,
)
from .text import Text
from .cells import cell_len
from .measure import Measurement
T = TypeVar("T")
class Renderables:
"""A list subclass which renders its contents to the console."""
def __init__(
self, renderables: Optional[Iterable["RenderableType"]] = None
) -> None:
self._renderables: List["RenderableType"] = (
list(renderables) if renderables is not None else []
)
def __rich_console__(
self, console: "Console", options: "ConsoleOptions"
) -> "RenderResult":
"""Console render method to insert line-breaks."""
yield from self._renderables
def __rich_measure__(
self, console: "Console", options: "ConsoleOptions"
) -> "Measurement":
dimensions = [
Measurement.get(console, options, renderable)
for renderable in self._renderables
]
if not dimensions:
return Measurement(1, 1)
_min = max(dimension.minimum for dimension in dimensions)
_max = max(dimension.maximum for dimension in dimensions)
return Measurement(_min, _max)
def append(self, renderable: "RenderableType") -> None:
self._renderables.append(renderable)
def __iter__(self) -> Iterable["RenderableType"]:
return iter(self._renderables)
class Lines:
"""A list subclass which can render to the console."""
def __init__(self, lines: Iterable["Text"] = ()) -> None:
self._lines: List["Text"] = list(lines)
def __repr__(self) -> str:
return f"Lines({self._lines!r})"
def __iter__(self) -> Iterator["Text"]:
return iter(self._lines)
@overload
def __getitem__(self, index: int) -> "Text":
...
@overload
def __getitem__(self, index: slice) -> List["Text"]:
...
def __getitem__(self, index: Union[slice, int]) -> Union["Text", List["Text"]]:
return self._lines[index]
def __setitem__(self, index: int, value: "Text") -> "Lines":
self._lines[index] = value
return self
def __len__(self) -> int:
return self._lines.__len__()
def __rich_console__(
self, console: "Console", options: "ConsoleOptions"
) -> "RenderResult":
"""Console render method to insert line-breaks."""
yield from self._lines
def append(self, line: "Text") -> None:
self._lines.append(line)
def extend(self, lines: Iterable["Text"]) -> None:
self._lines.extend(lines)
def pop(self, index: int = -1) -> "Text":
return self._lines.pop(index)
def justify(
self,
console: "Console",
width: int,
justify: "JustifyMethod" = "left",
overflow: "OverflowMethod" = "fold",
) -> None:
"""Justify and overflow text to a given width.
Args:
console (Console): Console instance.
width (int): Number of characters per line.
justify (str, optional): Default justify method for text: "left", "center", "full" or "right". Defaults to "left".
overflow (str, optional): Default overflow for text: "crop", "fold", or "ellipsis". Defaults to "fold".
"""
from .text import Text
if justify == "left":
for line in self._lines:
line.truncate(width, overflow=overflow, pad=True)
elif justify == "center":
for line in self._lines:
line.rstrip()
line.truncate(width, overflow=overflow)
line.pad_left((width - cell_len(line.plain)) // 2)
line.pad_right(width - cell_len(line.plain))
elif justify == "right":
for line in self._lines:
line.rstrip()
line.truncate(width, overflow=overflow)
line.pad_left(width - cell_len(line.plain))
elif justify == "full":
for line_index, line in enumerate(self._lines):
if line_index == len(self._lines) - 1:
break
words = line.split(" ")
words_size = sum(cell_len(word.plain) for word in words)
num_spaces = len(words) - 1
spaces = [1 for _ in range(num_spaces)]
index = 0
if spaces:
while words_size + num_spaces < width:
spaces[len(spaces) - index - 1] += 1
num_spaces += 1
index = (index + 1) % len(spaces)
tokens: List[Text] = []
for index, (word, next_word) in enumerate(
zip_longest(words, words[1:])
):
tokens.append(word)
if index < len(spaces):
style = word.get_style_at_offset(console, -1)
next_style = next_word.get_style_at_offset(console, 0)
space_style = style if style == next_style else line.style
tokens.append(Text(" " * spaces[index], style=space_style))
self[line_index] = Text("").join(tokens)