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use std::borrow::Cow;
use iterator_endiate::EndiateIteratorExt;
use source_map::Span;
use tokenizer_lib::{Token, TokenReader};
use visitable_derive::Visitable;
use crate::{
extractor::ExtractedFunctions, tokens::token_as_identifier, ASTNode, Expression, ParseResult,
ParseSettings, TSXToken, Visitable,
};
#[derive(Debug, PartialEq, Eq, Clone, Visitable)]
#[cfg_attr(feature = "self-rust-tokenize", derive(self_rust_tokenize::SelfRustTokenize))]
pub struct Decorator {
pub name: String,
pub arguments: Option<Vec<Expression>>,
pub position: Span,
}
impl ASTNode for Decorator {
fn get_position(&self) -> Cow<Span> {
Cow::Borrowed(&self.position)
}
fn from_reader(
reader: &mut impl TokenReader<TSXToken, Span>,
state: &mut crate::ParsingState,
settings: &ParseSettings,
) -> ParseResult<Self> {
let at_pos = reader.expect_next(TSXToken::At)?;
Self::from_reader_sub_at_symbol(reader, state, settings, at_pos)
}
fn to_string_from_buffer<T: source_map::ToString>(
&self,
buf: &mut T,
settings: &crate::ToStringSettingsAndData,
depth: u8,
) {
if settings.0.include_decorators {
buf.push('@');
buf.push_str(self.name.as_str());
if let Some(arguments) = &self.arguments {
buf.push('(');
for (at_end, argument) in arguments.iter().endiate() {
argument.to_string_from_buffer(buf, settings, depth);
if !at_end {
buf.push(',');
settings.0.add_gap(buf);
}
}
buf.push(')');
}
}
}
}
impl Decorator {
pub(crate) fn from_reader_sub_at_symbol(
reader: &mut impl TokenReader<TSXToken, Span>,
state: &mut crate::ParsingState,
settings: &ParseSettings,
at_pos: Span,
) -> ParseResult<Self> {
let (name, name_position) = token_as_identifier(reader.next().unwrap(), "Decorator name")?;
let (arguments, position) = if matches!(reader.peek().unwrap().0, TSXToken::OpenParentheses)
{
reader.next();
let mut arguments = Vec::<_>::new();
loop {
if matches!(reader.peek().unwrap().0, TSXToken::CloseParentheses) {
break;
}
arguments.push(Expression::from_reader(reader, state, settings)?);
match reader.peek() {
Some(Token(TSXToken::Comma, _)) => {
reader.next();
}
_ => break,
}
}
let end_position = reader.expect_next(TSXToken::CloseParentheses)?;
(Some(arguments), at_pos.union(&end_position))
} else {
(None, at_pos.union(&name_position))
};
Ok(Self { name, arguments, position })
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
#[cfg_attr(feature = "self-rust-tokenize", derive(self_rust_tokenize::SelfRustTokenize))]
pub struct Decorated<T> {
pub decorators: Vec<Decorator>,
pub on: T,
}
impl<N: ASTNode> ASTNode for Decorated<N> {
fn get_position(&self) -> Cow<Span> {
self.on.get_position()
}
fn from_reader(
reader: &mut impl TokenReader<TSXToken, Span>,
state: &mut crate::ParsingState,
settings: &ParseSettings,
) -> ParseResult<Self> {
let decorators = decorators_from_reader(reader, state, settings)?;
N::from_reader(reader, state, settings).map(|on| Self { on, decorators })
}
fn to_string_from_buffer<T: source_map::ToString>(
&self,
buf: &mut T,
settings: &crate::ToStringSettingsAndData,
depth: u8,
) {
self.to_string_from_buffer_just_decorators(buf, settings, depth);
self.on.to_string_from_buffer(buf, settings, depth);
}
}
impl<U> Decorated<U> {
pub fn new(on: U) -> Self {
Self { decorators: Default::default(), on }
}
pub(crate) fn to_string_from_buffer_just_decorators<T: source_map::ToString>(
&self,
buf: &mut T,
settings: &crate::ToStringSettingsAndData,
depth: u8,
) {
if settings.0.include_decorators {
for decorator in self.decorators.iter() {
decorator.to_string_from_buffer(buf, settings, depth);
if settings.0.pretty {
buf.push_new_line();
} else {
buf.push(' ');
}
}
}
}
}
pub(crate) fn decorators_from_reader(
reader: &mut impl TokenReader<TSXToken, Span>,
state: &mut crate::ParsingState,
settings: &ParseSettings,
) -> ParseResult<Vec<Decorator>> {
let mut decorators = Vec::new();
while let Some(Token(TSXToken::At, _)) = reader.peek() {
decorators.push(Decorator::from_reader(reader, state, settings)?);
}
Ok(decorators)
}
impl<T: Visitable> Visitable for Decorated<T> {
fn visit<TData>(
&self,
visitors: &mut (impl crate::VisitorReceiver<TData> + ?Sized),
data: &mut TData,
settings: &crate::VisitSettings,
functions: &mut ExtractedFunctions,
chain: &mut temporary_annex::Annex<crate::Chain>,
) {
self.on.visit(visitors, data, settings, functions, chain);
}
fn visit_mut<TData>(
&mut self,
visitors: &mut (impl crate::VisitorMutReceiver<TData> + ?Sized),
data: &mut TData,
settings: &crate::VisitSettings,
functions: &mut ExtractedFunctions,
chain: &mut temporary_annex::Annex<crate::Chain>,
) {
self.on.visit_mut(visitors, data, settings, functions, chain);
}
}