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Custom indentation

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This commit is contained in:
John Doty 2024-09-14 07:28:18 -07:00
parent a1fa03615c
commit f3a4c4348a
2 changed files with 18 additions and 8 deletions
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22
parser/wadler.py
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@ -108,7 +108,7 @@ class DocumentLayout:
return result
def layout_document(doc: Document, width: int) -> DocumentLayout:
def layout_document(doc: Document, width: int, indent: str) -> DocumentLayout:
"""Lay out a document to fit within the given width.
The result of this function is a DocumentLayout which can trivially be
@ -213,13 +213,13 @@ def layout_document(doc: Document, width: int) -> DocumentLayout:
column += len(replace)
else:
# TODO: Custom newline expansion, custom indent segments.
output.append("\n" + (chunk.indent * " "))
column = chunk.indent
output.append("\n" + (chunk.indent * indent))
column = chunk.indent * len(indent)
case ForceBreak():
# TODO: Custom newline expansion, custom indent segments.
output.append("\n" + (chunk.indent * " "))
column = chunk.indent
output.append("\n" + (chunk.indent * indent))
column = chunk.indent * len(indent)
case Cons(left, right):
chunks.append(chunk.with_document(right))
@ -363,12 +363,20 @@ class Printer:
grammar: parser.Grammar
_matchers: dict[str, Matcher]
_nonterminals: dict[str, parser.NonTerminal]
_indent: str
def __init__(self, grammar: parser.Grammar):
def __init__(self, grammar: parser.Grammar, indent: str | None = None):
self.grammar = grammar
self._nonterminals = {nt.name: nt for nt in grammar.non_terminals()}
self._matchers = {}
if indent is None:
indent = getattr(self.grammar, "pretty_indent", " ")
self._indent = indent
def indent(self) -> str:
return self._indent
def lookup_nonterminal(self, name: str) -> parser.NonTerminal:
return self._nonterminals[name]
@ -552,4 +560,4 @@ class Printer:
def format_tree(self, tree: runtime.Tree, width: int) -> DocumentLayout:
doc = self.convert_tree_to_document(tree)
return layout_document(doc, width)
return layout_document(doc, width, self._indent)