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