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use std::borrow::Cow;
use crate::{
errors::parse_lexing_error, ASTNode, Expression, ParseResult, ParseSettings, Span, TSXToken,
Token, TokenReader,
};
use visitable_derive::Visitable;
#[derive(Debug, Clone, PartialEq, Eq, Visitable)]
#[cfg_attr(feature = "self-rust-tokenize", derive(self_rust_tokenize::SelfRustTokenize))]
pub struct TemplateLiteral {
pub tag: Option<Box<Expression>>,
pub parts: Vec<TemplateLiteralPart<Expression>>,
pub position: Span,
pub expression_id: super::ExpressionId,
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum TemplateLiteralPart<T: ASTNode> {
Static(String),
Dynamic(Box<T>),
}
#[cfg(feature = "self-rust-tokenize")]
impl<T: ASTNode + self_rust_tokenize::SelfRustTokenize> self_rust_tokenize::SelfRustTokenize
for TemplateLiteralPart<T>
{
fn append_to_token_stream(
&self,
token_stream: &mut self_rust_tokenize::proc_macro2::TokenStream,
) {
match self {
TemplateLiteralPart::Static(inner) => {
let inner = self_rust_tokenize::SelfRustTokenize::to_tokens(inner);
token_stream
.extend(self_rust_tokenize::quote!(TemplateLiteralPart::Static(#inner)));
}
TemplateLiteralPart::Dynamic(inner) => {
let inner = self_rust_tokenize::SelfRustTokenize::to_tokens(inner);
token_stream
.extend(self_rust_tokenize::quote!(TemplateLiteralPart::Dynamic(#inner)));
}
}
}
}
impl<T: ASTNode + crate::Visitable> crate::Visitable for TemplateLiteralPart<T> {
fn visit<TData>(
&self,
visitors: &mut (impl crate::VisitorReceiver<TData> + ?Sized),
data: &mut TData,
settings: &crate::VisitSettings,
functions: &mut crate::extractor::ExtractedFunctions,
chain: &mut temporary_annex::Annex<crate::Chain>,
) {
if let Self::Dynamic(dynamic) = self {
dynamic.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 crate::extractor::ExtractedFunctions,
chain: &mut temporary_annex::Annex<crate::Chain>,
) {
if let Self::Dynamic(dynamic) = self {
dynamic.visit_mut(visitors, data, settings, functions, chain)
}
}
}
impl ASTNode for TemplateLiteral {
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 start_pos = reader.expect_next(TSXToken::TemplateLiteralStart)?;
Self::from_reader_sub_start_with_tag(reader, state, settings, None, start_pos)
}
fn to_string_from_buffer<T: source_map::ToString>(
&self,
buf: &mut T,
settings: &crate::ToStringSettingsAndData,
depth: u8,
) {
if let Some(tag) = &self.tag {
tag.to_string_from_buffer(buf, settings, depth);
}
buf.push('`');
for part in self.parts.iter() {
match part {
TemplateLiteralPart::Static(content) => {
buf.push_str_contains_new_line(content.as_str())
}
TemplateLiteralPart::Dynamic(expression) => {
buf.push_str("${");
expression.to_string_from_buffer(buf, settings, depth);
buf.push('}');
}
}
}
buf.push('`');
}
}
impl TemplateLiteral {
pub(crate) fn from_reader_sub_start_with_tag(
reader: &mut impl TokenReader<TSXToken, Span>,
state: &mut crate::ParsingState,
settings: &ParseSettings,
tag: Option<Box<Expression>>,
start_position: Span,
) -> ParseResult<Self> {
let mut parts = Vec::<TemplateLiteralPart<_>>::new();
loop {
match reader.next().ok_or_else(parse_lexing_error)? {
Token(TSXToken::TemplateLiteralChunk(chunk), _) => {
parts.push(TemplateLiteralPart::Static(chunk));
}
Token(TSXToken::TemplateLiteralExpressionStart, _) => {
let expression = Expression::from_reader(reader, state, settings)?;
reader.expect_next(TSXToken::TemplateLiteralExpressionEnd)?;
parts.push(TemplateLiteralPart::Dynamic(Box::new(expression)));
}
Token(TSXToken::TemplateLiteralEnd, end_position) => {
return Ok(Self {
parts,
tag,
position: start_position.union(&end_position),
expression_id: super::ExpressionId::new(),
});
}
_ => unreachable!(),
}
}
}
}