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 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)