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Added Tree.__rich__() method to make Tree a Rich renderable #1117

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Merged
merged 4 commits into from
Feb 21, 2022
Merged

Added Tree.__rich__() method to make Tree a Rich renderable #1117

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45dc2cd
Added Tree.rich() method
erezsh Feb 21, 2022
6c00cc0
Added to docs
erezsh Feb 21, 2022
68162d8
Tree: Use __rich__ method to make Tree itself a rich renderable.
erezsh Feb 21, 2022
d036e90
Update docs
erezsh Feb 21, 2022
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2 changes: 1 addition & 1 deletion docs/classes.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@ Tree

.. autoclass:: lark.Tree
:members: pretty, find_pred, find_data, iter_subtrees, scan_values,
iter_subtrees_topdown
iter_subtrees_topdown, __rich__

Token
-----
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28 changes: 28 additions & 0 deletions lark/tree.py
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Expand Up @@ -86,6 +86,34 @@ def pretty(self, indent_str: str=' ') -> str:
"""
return ''.join(self._pretty(0, indent_str))

def __rich__(self, parent:'rich.tree.Tree'=None) -> 'rich.tree.Tree':
"""Returns a tree widget for the 'rich' library.

Example:
::
from rich import print
from lark import Tree

tree = Tree('root', ['node1', 'node2'])
print(tree)
"""
return self._rich(parent)

def _rich(self, parent):
if parent:
tree = parent.add(f'[bold]{self.data}[/bold]')
else:
import rich.tree
tree = rich.tree.Tree(self.data)

for c in self.children:
if isinstance(c, Tree):
c._rich(tree)
else:
tree.add(f'[green]{c}[/green]')

return tree

def __eq__(self, other):
try:
return self.data == other.data and self.children == other.children
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