from collections import defaultdict
from itertools import chain
from operator import itemgetter
from typing import Dict, Iterable, List, Optional, Tuple
from .align import Align, AlignMethod
from .console import Console, ConsoleOptions, RenderableType, RenderResult
from .constrain import Constrain
from .measure import Measurement
from .padding import Padding, PaddingDimensions
from .table import Table
from .text import TextType
from .jupyter import JupyterMixin
[docs]class Columns(JupyterMixin):
"""Display renderables in neat columns.
Args:
renderables (Iterable[RenderableType]): Any number of Rich renderables (including str).
width (int, optional): The desired width of the columns, or None to auto detect. Defaults to None.
padding (PaddingDimensions, optional): Optional padding around cells. Defaults to (0, 1).
expand (bool, optional): Expand columns to full width. Defaults to False.
equal (bool, optional): Arrange in to equal sized columns. Defaults to False.
column_first (bool, optional): Align items from top to bottom (rather than left to right). Defaults to False.
right_to_left (bool, optional): Start column from right hand side. Defaults to False.
align (str, optional): Align value ("left", "right", or "center") or None for default. Defaults to None.
title (TextType, optional): Optional title for Columns.
"""
def __init__(
self,
renderables: Optional[Iterable[RenderableType]] = None,
padding: PaddingDimensions = (0, 1),
*,
width: Optional[int] = None,
expand: bool = False,
equal: bool = False,
column_first: bool = False,
right_to_left: bool = False,
align: Optional[AlignMethod] = None,
title: Optional[TextType] = None,
) -> None:
self.renderables = list(renderables or [])
self.width = width
self.padding = padding
self.expand = expand
self.equal = equal
self.column_first = column_first
self.right_to_left = right_to_left
self.align: Optional[AlignMethod] = align
self.title = title
[docs] def add_renderable(self, renderable: RenderableType) -> None:
"""Add a renderable to the columns.
Args:
renderable (RenderableType): Any renderable object.
"""
self.renderables.append(renderable)
def __rich_console__(
self, console: Console, options: ConsoleOptions
) -> RenderResult:
render_str = console.render_str
renderables = [
render_str(renderable) if isinstance(renderable, str) else renderable
for renderable in self.renderables
]
if not renderables:
return
_top, right, _bottom, left = Padding.unpack(self.padding)
width_padding = max(left, right)
max_width = options.max_width
widths: Dict[int, int] = defaultdict(int)
column_count = len(renderables)
get_measurement = Measurement.get
renderable_widths = [
get_measurement(console, options, renderable).maximum
for renderable in renderables
]
if self.equal:
renderable_widths = [max(renderable_widths)] * len(renderable_widths)
def iter_renderables(
column_count: int,
) -> Iterable[Tuple[int, Optional[RenderableType]]]:
item_count = len(renderables)
if self.column_first:
width_renderables = list(zip(renderable_widths, renderables))
column_lengths: List[int] = [item_count // column_count] * column_count
for col_no in range(item_count % column_count):
column_lengths[col_no] += 1
row_count = (item_count + column_count - 1) // column_count
cells = [[-1] * column_count for _ in range(row_count)]
row = col = 0
for index in range(item_count):
cells[row][col] = index
column_lengths[col] -= 1
if column_lengths[col]:
row += 1
else:
col += 1
row = 0
for index in chain.from_iterable(cells):
if index == -1:
break
yield width_renderables[index]
else:
yield from zip(renderable_widths, renderables)
# Pad odd elements with spaces
if item_count % column_count:
for _ in range(column_count - (item_count % column_count)):
yield 0, None
table = Table.grid(padding=self.padding, collapse_padding=True, pad_edge=False)
table.expand = self.expand
table.title = self.title
if self.width is not None:
column_count = (max_width) // (self.width + width_padding)
for _ in range(column_count):
table.add_column(width=self.width)
else:
while column_count > 1:
widths.clear()
column_no = 0
for renderable_width, _ in iter_renderables(column_count):
widths[column_no] = max(widths[column_no], renderable_width)
total_width = sum(widths.values()) + width_padding * (
len(widths) - 1
)
if total_width > max_width:
column_count = len(widths) - 1
break
else:
column_no = (column_no + 1) % column_count
else:
break
get_renderable = itemgetter(1)
_renderables = [
get_renderable(_renderable)
for _renderable in iter_renderables(column_count)
]
if self.equal:
_renderables = [
None
if renderable is None
else Constrain(renderable, renderable_widths[0])
for renderable in _renderables
]
if self.align:
align = self.align
_Align = Align
_renderables = [
None if renderable is None else _Align(renderable, align)
for renderable in _renderables
]
right_to_left = self.right_to_left
add_row = table.add_row
for start in range(0, len(_renderables), column_count):
row = _renderables[start : start + column_count]
if right_to_left:
row = row[::-1]
add_row(*row)
yield table
if __name__ == "__main__": # pragma: no cover
import os
console = Console()
files = [f"{i} {s}" for i, s in enumerate(sorted(os.listdir()))]
columns = Columns(files, padding=(0, 1), expand=False, equal=False)
console.print(columns)
console.rule()
columns.column_first = True
console.print(columns)
columns.right_to_left = True
console.rule()
console.print(columns)