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from typing import Iterator, List, Optional, Tuple
from ._loop import loop_first, loop_last
from .console import Console, ConsoleOptions, RenderableType, RenderResult
from .jupyter import JupyterMixin
from .measure import Measurement
from .segment import Segment
from .style import Style, StyleStack, StyleType
from .styled import Styled
GuideType = Tuple[str, str, str, str]
class Tree(JupyterMixin):
"""A renderable for a tree structure.
Attributes:
ASCII_GUIDES (GuideType): Guide lines used when Console.ascii_only is True.
TREE_GUIDES (List[GuideType, GuideType, GuideType]): Default guide lines.
Args:
label (RenderableType): The renderable or str for the tree label.
style (StyleType, optional): Style of this tree. Defaults to "tree".
guide_style (StyleType, optional): Style of the guide lines. Defaults to "tree.line".
expanded (bool, optional): Also display children. Defaults to True.
highlight (bool, optional): Highlight renderable (if str). Defaults to False.
hide_root (bool, optional): Hide the root node. Defaults to False.
"""
ASCII_GUIDES = (" ", "| ", "+-- ", "`-- ")
TREE_GUIDES = [
(" ", "│ ", "├── ", "└── "),
(" ", "┃ ", "┣━━ ", "┗━━ "),
(" ", "║ ", "╠══ ", "╚══ "),
]
def __init__(
self,
label: RenderableType,
*,
style: StyleType = "tree",
guide_style: StyleType = "tree.line",
expanded: bool = True,
highlight: bool = False,
hide_root: bool = False,
) -> None:
self.label = label
self.style = style
self.guide_style = guide_style
self.children: List[Tree] = []
self.expanded = expanded
self.highlight = highlight
self.hide_root = hide_root
def add(
self,
label: RenderableType,
*,
style: Optional[StyleType] = None,
guide_style: Optional[StyleType] = None,
expanded: bool = True,
highlight: Optional[bool] = False,
) -> "Tree":
"""Add a child tree.
Args:
label (RenderableType): The renderable or str for the tree label.
style (StyleType, optional): Style of this tree. Defaults to "tree".
guide_style (StyleType, optional): Style of the guide lines. Defaults to "tree.line".
expanded (bool, optional): Also display children. Defaults to True.
highlight (Optional[bool], optional): Highlight renderable (if str). Defaults to False.
Returns:
Tree: A new child Tree, which may be further modified.
"""
node = Tree(
label,
style=self.style if style is None else style,
guide_style=self.guide_style if guide_style is None else guide_style,
expanded=expanded,
highlight=self.highlight if highlight is None else highlight,
)
self.children.append(node)
return node
def __rich_console__(
self, console: "Console", options: "ConsoleOptions"
) -> "RenderResult":
stack: List[Iterator[Tuple[bool, Tree]]] = []
pop = stack.pop
push = stack.append
new_line = Segment.line()
get_style = console.get_style
null_style = Style.null()
guide_style = get_style(self.guide_style, default="") or null_style
SPACE, CONTINUE, FORK, END = range(4)
_Segment = Segment
def make_guide(index: int, style: Style) -> Segment:
"""Make a Segment for a level of the guide lines."""
if options.ascii_only:
line = self.ASCII_GUIDES[index]
else:
guide = 1 if style.bold else (2 if style.underline2 else 0)
line = self.TREE_GUIDES[0 if options.legacy_windows else guide][index]
return _Segment(line, style)
levels: List[Segment] = [make_guide(CONTINUE, guide_style)]
push(iter(loop_last([self])))
guide_style_stack = StyleStack(get_style(self.guide_style))
style_stack = StyleStack(get_style(self.style))
remove_guide_styles = Style(bold=False, underline2=False)
depth = 0
while stack:
stack_node = pop()
try:
last, node = next(stack_node)
except StopIteration:
levels.pop()
if levels:
guide_style = levels[-1].style or null_style
levels[-1] = make_guide(FORK, guide_style)
guide_style_stack.pop()
style_stack.pop()
continue
push(stack_node)
if last:
levels[-1] = make_guide(END, levels[-1].style or null_style)
guide_style = guide_style_stack.current + get_style(node.guide_style)
style = style_stack.current + get_style(node.style)
prefix = levels[(2 if self.hide_root else 1) :]
renderable_lines = console.render_lines(
Styled(node.label, style),
options.update(
width=options.max_width
- sum(level.cell_length for level in prefix),
highlight=self.highlight,
height=None,
),
pad=options.justify is not None,
)
if not (depth == 0 and self.hide_root):
for first, line in loop_first(renderable_lines):
if prefix:
yield from _Segment.apply_style(
prefix,
style.background_style,
post_style=remove_guide_styles,
)
yield from line
yield new_line
if first and prefix:
prefix[-1] = make_guide(
SPACE if last else CONTINUE, prefix[-1].style or null_style
)
if node.expanded and node.children:
levels[-1] = make_guide(
SPACE if last else CONTINUE, levels[-1].style or null_style
)
levels.append(
make_guide(END if len(node.children) == 1 else FORK, guide_style)
)
style_stack.push(get_style(node.style))
guide_style_stack.push(get_style(node.guide_style))
push(iter(loop_last(node.children)))
depth += 1
def __rich_measure__(
self, console: "Console", options: "ConsoleOptions"
) -> "Measurement":
stack: List[Iterator[Tree]] = [iter([self])]
pop = stack.pop
push = stack.append
minimum = 0
maximum = 0
measure = Measurement.get
level = 0
while stack:
iter_tree = pop()
try:
tree = next(iter_tree)
except StopIteration:
level -= 1
continue
push(iter_tree)
min_measure, max_measure = measure(console, options, tree.label)
indent = level * 4
minimum = max(min_measure + indent, minimum)
maximum = max(max_measure + indent, maximum)
if tree.expanded and tree.children:
push(iter(tree.children))
level += 1
return Measurement(minimum, maximum)
if __name__ == "__main__": # pragma: no cover
from rich.console import Group
from rich.markdown import Markdown
from rich.panel import Panel
from rich.syntax import Syntax
from rich.table import Table
table = Table(row_styles=["", "dim"])
table.add_column("Released", style="cyan", no_wrap=True)
table.add_column("Title", style="magenta")
table.add_column("Box Office", justify="right", style="green")
table.add_row("Dec 20, 2019", "Star Wars: The Rise of Skywalker", "$952,110,690")
table.add_row("May 25, 2018", "Solo: A Star Wars Story", "$393,151,347")
table.add_row("Dec 15, 2017", "Star Wars Ep. V111: The Last Jedi", "$1,332,539,889")
table.add_row("Dec 16, 2016", "Rogue One: A Star Wars Story", "$1,332,439,889")
code = """\
class Segment(NamedTuple):
text: str = ""
style: Optional[Style] = None
is_control: bool = False
"""
syntax = Syntax(code, "python", theme="monokai", line_numbers=True)
markdown = Markdown(
"""\
### example.md
> Hello, World!
>
> Markdown _all_ the things
"""
)
root = Tree("🌲 [b green]Rich Tree", highlight=True, hide_root=True)
node = root.add(":file_folder: Renderables", guide_style="red")
simple_node = node.add(":file_folder: [bold yellow]Atomic", guide_style="uu green")
simple_node.add(Group("📄 Syntax", syntax))
simple_node.add(Group("📄 Markdown", Panel(markdown, border_style="green")))
containers_node = node.add(
":file_folder: [bold magenta]Containers", guide_style="bold magenta"
)
containers_node.expanded = True
panel = Panel.fit("Just a panel", border_style="red")
containers_node.add(Group("📄 Panels", panel))
containers_node.add(Group("📄 [b magenta]Table", table))
console = Console()
console.print(root)
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