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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)