diff options
Diffstat (limited to 'src/basic_emitter.rs')
| -rw-r--r-- | src/basic_emitter.rs | 178 |
1 files changed, 153 insertions, 25 deletions
diff --git a/src/basic_emitter.rs b/src/basic_emitter.rs index bcb3f41..e67447b 100644 --- a/src/basic_emitter.rs +++ b/src/basic_emitter.rs @@ -1,20 +1,36 @@ +use std::collections::btree_map::Entry; +use std::collections::BTreeSet; use std::collections::VecDeque; use std::ops::Range; +use crate::let_else::assume; +use crate::offset::NoopOffset; use crate::offset::Offset; +use crate::token::{Doctype, EndTag, StartTag, Token}; use crate::Emitter; use crate::Error; -use crate::Token; /// An [`Emitter`] implementation that yields [`Token`]. -pub struct BasicEmitter<O> { +pub struct BasicEmitter<O = NoopOffset> { + current_token: Option<Token>, + current_attribute_name: String, + current_attr_internal: crate::token::AttrInternal, + seen_attributes: BTreeSet<String>, + emitted_tokens: VecDeque<Token>, errors: VecDeque<(Error, Range<O>)>, + attr_name_span: Range<O>, } impl<O: Default> Default for BasicEmitter<O> { fn default() -> Self { BasicEmitter { + current_token: None, + current_attribute_name: String::new(), + current_attr_internal: Default::default(), + seen_attributes: BTreeSet::new(), + emitted_tokens: VecDeque::new(), errors: VecDeque::new(), + attr_name_span: Default::default(), } } } @@ -30,97 +46,209 @@ impl<O> Iterator for BasicEmitter<O> { type Item = Token; fn next(&mut self) -> Option<Self::Item> { - todo!() + self.emitted_tokens.pop_back() } } #[allow(unused_variables)] impl<O: Offset> Emitter<O> for BasicEmitter<O> { fn report_error(&mut self, error: Error, span: Range<O>) { - todo!() + self.errors.push_back((error, span)); } fn emit_char(&mut self, c: char) { - todo!() + self.emit_token(Token::Char(c)); } fn emit_eof(&mut self) { - todo!() + self.emit_token(Token::EndOfFile); } fn init_start_tag(&mut self, tag_offset: O, name_offset: O) { - todo!() + self.current_token = Some(Token::StartTag(StartTag { + self_closing: false, + name: String::new(), + attributes: Default::default(), + })); } fn init_end_tag(&mut self, tag_offset: O, name_offset: O) { - todo!() + self.current_token = Some(Token::EndTag(EndTag { + name: String::new(), + })); + self.seen_attributes.clear(); } fn push_tag_name(&mut self, s: &str) { - todo!() + assume!( + Some(Token::StartTag(StartTag { name, .. }) | Token::EndTag(EndTag { name, .. })), + &mut self.current_token + ); + name.push_str(s); } fn init_attribute_name(&mut self, offset: O) { - todo!() + self.flush_current_attribute(); + self.attr_name_span.start = offset; } fn push_attribute_name(&mut self, s: &str) { - todo!() + self.current_attribute_name.push_str(s); + } + + fn terminate_attribute_name(&mut self, offset: O) { + self.attr_name_span.end = offset; } fn push_attribute_value(&mut self, s: &str) { - todo!() + self.current_attr_internal.value.push_str(s); } fn set_self_closing(&mut self, slash_span: Range<O>) { - todo!() + let token = self.current_token.as_mut().unwrap(); + + match token { + Token::StartTag(tag) => { + tag.self_closing = true; + } + Token::EndTag(_) => { + self.report_error(Error::EndTagWithTrailingSolidus, slash_span); + } + other => debug_assert!(false, "unexpected current_token: {other:?}"), + } } fn emit_current_tag(&mut self, offset: O) { - todo!() + self.flush_current_attribute(); + let mut token = self.current_token.take().unwrap(); + match &mut token { + Token::EndTag(_) => { + if !self.seen_attributes.is_empty() { + self.report_error(Error::EndTagWithAttributes, self.attr_name_span.clone()); + } + self.seen_attributes.clear(); + } + Token::StartTag(_) => {} + other => { + debug_assert!(false, "unexpected current_token: {other:?}"); + return; + } + } + self.emit_token(token); } fn init_comment(&mut self, data_start_offset: O) { - todo!() + self.current_token = Some(Token::Comment(String::new())); } fn push_comment(&mut self, s: &str) { - todo!() + assume!(Some(Token::Comment(data)), &mut self.current_token); + data.push_str(s); } fn emit_current_comment(&mut self, data_end_offset: O) { - todo!() + let token = self.current_token.take().unwrap(); + self.emit_token(token); } fn init_doctype(&mut self, offset: O) { - todo!() + self.current_token = Some(Token::Doctype(Doctype { + name: None, + force_quirks: false, + public_id: None, + system_id: None, + })); + } + + fn init_doctype_name(&mut self, offset: O) { + assume!(Some(Token::Doctype(doctype)), &mut self.current_token); + doctype.name = Some("".into()); } fn push_doctype_name(&mut self, s: &str) { - todo!() + assume!( + Some(Token::Doctype(Doctype { + name: Some(name), + .. + })), + &mut self.current_token + ); + name.push_str(s); } fn init_doctype_public_id(&mut self, offset: O) { - todo!() + assume!(Some(Token::Doctype(doctype)), &mut self.current_token); + doctype.public_id = Some("".to_owned()); } fn push_doctype_public_id(&mut self, s: &str) { - todo!() + assume!( + Some(Token::Doctype(Doctype { + public_id: Some(public_id), + .. + })), + &mut self.current_token + ); + public_id.push_str(s); } fn init_doctype_system_id(&mut self, offset: O) { - todo!() + assume!(Some(Token::Doctype(doctype)), &mut self.current_token); + doctype.system_id = Some("".to_owned()); } fn push_doctype_system_id(&mut self, s: &str) { - todo!() + assume!( + Some(Token::Doctype(Doctype { + system_id: Some(id), + .. + })), + &mut self.current_token + ); + id.push_str(s); } fn set_force_quirks(&mut self) { - todo!() + assume!(Some(Token::Doctype(doctype)), &mut self.current_token); + doctype.force_quirks = true; } fn emit_current_doctype(&mut self, offset: O) { - todo!() + let token = self.current_token.take().unwrap(); + self.emit_token(token); + } +} + +impl<O> BasicEmitter<O> { + fn emit_token(&mut self, token: Token) { + self.emitted_tokens.push_front(token); + } + + fn flush_current_attribute(&mut self) + where + O: Offset, + { + if self.current_attribute_name.is_empty() { + return; + } + let name = std::mem::take(&mut self.current_attribute_name); + let attr_internal = std::mem::take(&mut self.current_attr_internal); + + match &mut self.current_token { + Some(Token::StartTag(tag)) => match tag.attributes.inner.entry(name) { + Entry::Vacant(vacant) => { + vacant.insert(attr_internal); + } + Entry::Occupied(_) => { + self.report_error(Error::DuplicateAttribute, self.attr_name_span.clone()); + } + }, + Some(Token::EndTag(_)) => { + if !self.seen_attributes.insert(name) { + self.report_error(Error::DuplicateAttribute, self.attr_name_span.clone()); + } + } + other => debug_assert!(false, "unexpected current_token: {other:?}"), + } } } |