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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
- class Tree(JupyterMixin):
- """A renderable for a tree structure.
- 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.
- """
- 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: 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)
- ASCII_GUIDES = (" ", "| ", "+-- ", "`-- ")
- TREE_GUIDES = [
- (" ", "│ ", "├── ", "└── "),
- (" ", "┃ ", "┣━━ ", "┗━━ "),
- (" ", "║ ", "╠══ ", "╚══ "),
- ]
- _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 = ASCII_GUIDES[index]
- else:
- guide = 1 if style.bold else (2 if style.underline2 else 0)
- line = 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,
- ),
- )
- 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 pip._vendor.rich.console import Group
- from pip._vendor.rich.markdown import Markdown
- from pip._vendor.rich.panel import Panel
- from pip._vendor.rich.syntax import Syntax
- from pip._vendor.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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