diff options
| author | Markus Unterwaditzer <markus-honeypot@unterwaditzer.net> | 2021-11-24 20:44:08 +0100 |
|---|---|---|
| committer | Markus Unterwaditzer <markus-honeypot@unterwaditzer.net> | 2021-11-24 20:51:21 +0100 |
| commit | 9909fc4580855a58a10eb84f0d143d1b3b3f464a (patch) | |
| tree | 36941a6a714a10b9ce554ba249975108e6a17274 /src/lib.rs | |
hello world
Diffstat (limited to 'src/lib.rs')
| -rw-r--r-- | src/lib.rs | 2112 |
1 files changed, 2112 insertions, 0 deletions
diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..ef6c9a2 --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,2112 @@ +#![deny(missing_docs)] +// This is an HTML parser. HTML can be untrusted input from the internet. +#![forbid(unsafe_code)] +#![doc = include_str!("../README.md")] + +mod emitter; +mod entities; +mod error; +mod machine; +mod reader; + +#[cfg(feature = "integration-tests")] +pub use machine::State; +#[cfg(not(feature = "integration-tests"))] +use machine::State; + +use machine::{ + ascii_digit_pat, control_pat, noncharacter_pat, surrogate_pat, whitespace_pat, ControlToken, +}; + +pub use emitter::{DefaultEmitter, Doctype, Emitter, EndTag, StartTag, Token}; +pub use reader::{Readable, Reader, StringReader}; + +pub use error::Error; + +macro_rules! ctostr { + ($c:expr) => { + &*$c.encode_utf8(&mut [0; 4]) + }; +} + +/// A HTML tokenizer. See crate-level docs for basic usage. +pub struct Tokenizer<R: Reader, E: Emitter = DefaultEmitter> { + eof: bool, + state: State, + emitter: E, + temporary_buffer: String, + reader: R, + to_reconsume: Option<Option<char>>, + character_reference_code: u32, + return_state: Option<State>, +} + +impl<R: Reader> Tokenizer<R> { + /// Create a new tokenizer from some input. + /// + /// `input` can be `&String` or `&str` at the moment, as those are the types for which + /// [`crate::Readable`] is implemented, but you can implement that trait on your own types. + /// + /// Patches are welcome for providing an efficient implementation over async streams, + /// iterators, files, etc, as long as any dependencies come behind featureflags. + pub fn new<'a, S: Readable<'a, Reader = R>>(input: S) -> Self { + Tokenizer::<S::Reader>::new_with_emitter(input, DefaultEmitter::default()) + } +} + +impl<R: Reader, E: Emitter> Tokenizer<R, E> { + /// Construct a new tokenizer from some input and a custom emitter. + /// + /// Use this method over [`Tokenizer::new`] when you want to have more control over string allocation for + /// tokens. + pub fn new_with_emitter<'a, S: Readable<'a, Reader = R>>(input: S, emitter: E) -> Self { + Tokenizer { + eof: false, + state: State::Data, + emitter, + temporary_buffer: String::new(), + to_reconsume: None, + reader: input.to_reader(), + character_reference_code: 0, + return_state: None, + } + } + + #[cfg(feature = "integration-tests")] + /// Test-internal function to override internal state. + /// + /// Only available with the `integration-tests` feature which is not public API. + pub fn set_state(&mut self, state: State) { + self.state = state; + } + + /// Set the statemachine to start/continue in [plaintext + /// state](https://html.spec.whatwg.org/#plaintext-state). + /// + /// This tokenizer never gets into that state naturally. + pub fn set_plaintext_state(&mut self) { + self.state = State::PlainText; + } + + #[cfg(feature = "integration-tests")] + /// Test-internal function to override internal state. + /// + /// Only available with the `integration-tests` feature which is not public API. + pub fn set_last_start_tag(&mut self, last_start_tag: Option<&str>) { + self.emitter.set_last_start_tag(last_start_tag); + } + + #[inline] + fn unread_char(&mut self, c: Option<char>) { + self.to_reconsume = Some(c); + } + + #[inline] + fn validate_char(&mut self, c: char) { + match c as u32 { + surrogate_pat!() => { + self.emitter.emit_error(Error::SurrogateInInputStream); + } + noncharacter_pat!() => { + self.emitter.emit_error(Error::NoncharacterInInputStream); + } + // control without whitespace or nul + x @ control_pat!() + if !matches!(x, 0x0000 | 0x0009 | 0x000a | 0x000c | 0x000d | 0x0020) => + { + self.emitter + .emit_error(Error::ControlCharacterInInputStream); + } + _ => (), + } + } + + fn read_char(&mut self) -> Option<char> { + if let Some(c) = self.to_reconsume.take() { + return c; + } + + let c = self.reader.read_char()?; + self.validate_char(c); + Some(c) + } + + #[inline] + fn try_read_string(&mut self, s: &str, case_sensitive: bool) -> bool { + debug_assert!(!s.is_empty()); + debug_assert!(self.to_reconsume.is_none()); + self.reader.try_read_string(s, case_sensitive) + } + + fn is_consumed_as_part_of_an_attribute(&self) -> bool { + matches!( + self.return_state, + Some( + State::AttributeValueDoubleQuoted + | State::AttributeValueSingleQuoted + | State::AttributeValueUnquoted + ) + ) + } + + fn flush_code_points_consumed_as_character_reference(&mut self) { + if self.is_consumed_as_part_of_an_attribute() { + self.emitter.push_attribute_value(&self.temporary_buffer); + self.temporary_buffer.clear(); + } else { + self.flush_buffer_characters(); + } + } + + fn next_input_character(&mut self) -> Option<char> { + let rv = self.read_char(); + self.unread_char(rv); + rv + } + + fn flush_buffer_characters(&mut self) { + self.emitter.emit_string(&self.temporary_buffer); + self.temporary_buffer.clear(); + } + + fn consume(&mut self) -> ControlToken { + macro_rules! mutate_character_reference { + (* $mul:literal + $x:ident - $sub:literal) => { + match self + .character_reference_code + .checked_mul($mul) + .and_then(|cr| cr.checked_add($x as u32 - $sub)) + { + Some(cr) => self.character_reference_code = cr, + None => { + // provoke err + self.character_reference_code = 0x110000; + } + }; + }; + } + + match self.state { + State::Data => match self.read_char() { + Some('&') => { + self.return_state = Some(self.state); + self.state = State::CharacterReference; + ControlToken::Continue + } + Some('<') => { + self.state = State::TagOpen; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.emit_string("\0"); + ControlToken::Continue + } + Some(x) => { + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + None => ControlToken::Eof, + }, + State::RcData => match self.read_char() { + Some('&') => { + self.return_state = Some(State::RcData); + self.state = State::CharacterReference; + ControlToken::Continue + } + Some('<') => { + self.state = State::RcDataLessThanSign; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + Some(x) => { + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + None => ControlToken::Eof, + }, + State::RawText => match self.read_char() { + Some('<') => { + self.state = State::RawTextLessThanSign; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + Some(x) => { + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + None => ControlToken::Eof, + }, + State::ScriptData => match self.read_char() { + Some('<') => { + self.state = State::ScriptDataLessThanSign; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + Some(x) => { + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + None => ControlToken::Eof, + }, + State::PlainText => match self.read_char() { + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + Some(x) => { + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + None => ControlToken::Eof, + }, + State::TagOpen => match self.read_char() { + Some('!') => { + self.state = State::MarkupDeclarationOpen; + ControlToken::Continue + } + Some('/') => { + self.state = State::EndTagOpen; + ControlToken::Continue + } + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.init_start_tag(); + self.state = State::TagName; + self.unread_char(Some(x)); + ControlToken::Continue + } + c @ Some('?') => { + self.emitter + .emit_error(Error::UnexpectedQuestionMarkInsteadOfTagName); + self.emitter.init_comment(); + self.state = State::BogusComment; + self.unread_char(c); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofBeforeTagName); + self.emitter.emit_string("<"); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter + .emit_error(Error::InvalidFirstCharacterOfTagName); + self.state = State::Data; + self.emitter.emit_string("<"); + self.unread_char(c); + ControlToken::Continue + } + }, + State::EndTagOpen => match self.read_char() { + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.init_end_tag(); + self.state = State::TagName; + self.unread_char(Some(x)); + ControlToken::Continue + } + Some('>') => { + self.emitter.emit_error(Error::MissingEndTagName); + self.state = State::Data; + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofBeforeTagName); + self.emitter.emit_string("</"); + ControlToken::Eof + } + Some(x) => { + self.emitter + .emit_error(Error::InvalidFirstCharacterOfTagName); + self.emitter.init_comment(); + self.state = State::BogusComment; + self.unread_char(Some(x)); + ControlToken::Continue + } + }, + State::TagName => match self.read_char() { + Some(whitespace_pat!()) => { + self.state = State::BeforeAttributeName; + ControlToken::Continue + } + Some('/') => { + self.state = State::SelfClosingStartTag; + ControlToken::Continue + } + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_tag_name("\u{fffd}"); + ControlToken::Continue + } + Some(x) => { + self.emitter.push_tag_name(ctostr!(x.to_ascii_lowercase())); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInTag); + ControlToken::Eof + } + }, + State::RcDataLessThanSign => match self.read_char() { + Some('/') => { + self.temporary_buffer.clear(); + self.state = State::RcDataEndTagOpen; + ControlToken::Continue + } + c => { + self.emitter.emit_string("<"); + self.state = State::RcData; + self.unread_char(c); + ControlToken::Continue + } + }, + State::RcDataEndTagOpen => match self.read_char() { + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.init_end_tag(); + self.state = State::RcDataEndTagName; + self.unread_char(Some(x)); + ControlToken::Continue + } + c => { + self.emitter.emit_string("</"); + self.state = State::RcData; + self.unread_char(c); + ControlToken::Continue + } + }, + State::RcDataEndTagName => match self.read_char() { + Some(whitespace_pat!()) if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::BeforeAttributeName; + ControlToken::Continue + } + Some('/') if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::SelfClosingStartTag; + ControlToken::Continue + } + Some('>') if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.push_tag_name(ctostr!(x.to_ascii_lowercase())); + self.temporary_buffer.push(x); + ControlToken::Continue + } + c => { + self.emitter.emit_string("</"); + self.flush_buffer_characters(); + + self.state = State::RcData; + self.unread_char(c); + ControlToken::Continue + } + }, + State::RawTextLessThanSign => match self.read_char() { + Some('/') => { + self.temporary_buffer.clear(); + self.state = State::RawTextEndTagOpen; + ControlToken::Continue + } + c => { + self.emitter.emit_string("<"); + self.state = State::RawText; + self.unread_char(c); + ControlToken::Continue + } + }, + State::RawTextEndTagOpen => match self.read_char() { + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.init_end_tag(); + self.state = State::RawTextEndTagName; + self.unread_char(Some(x)); + ControlToken::Continue + } + c => { + self.emitter.emit_string("</"); + self.state = State::RawText; + self.unread_char(c); + ControlToken::Continue + } + }, + State::RawTextEndTagName => match self.read_char() { + Some(whitespace_pat!()) if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::BeforeAttributeName; + ControlToken::Continue + } + Some('/') if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::SelfClosingStartTag; + ControlToken::Continue + } + Some('>') if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.push_tag_name(ctostr!(x.to_ascii_lowercase())); + self.temporary_buffer.push(x); + ControlToken::Continue + } + c => { + self.emitter.emit_string("</"); + self.flush_buffer_characters(); + + self.state = State::RawText; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataLessThanSign => match self.read_char() { + Some('/') => { + self.temporary_buffer.clear(); + self.state = State::ScriptDataEndTagOpen; + ControlToken::Continue + } + Some('!') => { + self.state = State::ScriptDataEscapeStart; + self.emitter.emit_string("<!"); + ControlToken::Continue + } + c => { + self.emitter.emit_string("<"); + self.state = State::Data; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataEndTagOpen => match self.read_char() { + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.init_end_tag(); + self.state = State::ScriptDataEndTagName; + self.unread_char(Some(x)); + ControlToken::Continue + } + c => { + self.emitter.emit_string("</"); + self.state = State::ScriptData; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataEndTagName => match self.read_char() { + Some(whitespace_pat!()) if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::BeforeAttributeName; + ControlToken::Continue + } + Some('/') if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::SelfClosingStartTag; + ControlToken::Continue + } + Some('>') if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.push_tag_name(ctostr!(x.to_ascii_lowercase())); + self.temporary_buffer.push(x.to_ascii_lowercase()); + ControlToken::Continue + } + c => { + self.emitter.emit_string("</"); + self.flush_buffer_characters(); + self.state = State::Data; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataEscapeStart => match self.read_char() { + Some('-') => { + self.state = State::ScriptDataEscapeStartDash; + self.emitter.emit_string("-"); + ControlToken::Continue + } + c => { + self.state = State::ScriptData; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataEscapeStartDash => match self.read_char() { + Some('-') => { + self.state = State::ScriptDataEscapedDashDash; + self.emitter.emit_string("-"); + ControlToken::Continue + } + c => { + self.state = State::ScriptData; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataEscaped => match self.read_char() { + Some('-') => { + self.state = State::ScriptDataEscapedDash; + self.emitter.emit_string("-"); + ControlToken::Continue + } + Some('<') => { + self.state = State::ScriptDataEscapedLessThanSign; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter + .emit_error(Error::EofInScriptHtmlCommentLikeText); + ControlToken::Eof + } + Some(x) => { + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + }, + State::ScriptDataEscapedDash => match self.read_char() { + Some('-') => { + self.state = State::ScriptDataEscapedDashDash; + self.emitter.emit_string("-"); + ControlToken::Continue + } + Some('<') => { + self.state = State::ScriptDataEscapedLessThanSign; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.state = State::ScriptDataEscaped; + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter + .emit_error(Error::EofInScriptHtmlCommentLikeText); + ControlToken::Eof + } + Some(x) => { + self.state = State::ScriptDataEscaped; + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + }, + State::ScriptDataEscapedDashDash => match self.read_char() { + Some('-') => { + self.emitter.emit_string("-"); + ControlToken::Continue + } + Some('<') => { + self.state = State::ScriptDataEscapedLessThanSign; + ControlToken::Continue + } + Some('>') => { + self.state = State::ScriptData; + self.emitter.emit_string(">"); + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.state = State::ScriptDataEscaped; + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter + .emit_error(Error::EofInScriptHtmlCommentLikeText); + ControlToken::Eof + } + Some(x) => { + self.state = State::ScriptDataEscaped; + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + }, + State::ScriptDataEscapedLessThanSign => match self.read_char() { + Some('/') => { + self.temporary_buffer.clear(); + self.state = State::ScriptDataEscapedEndTagOpen; + ControlToken::Continue + } + Some(x) if x.is_ascii_alphabetic() => { + self.temporary_buffer.clear(); + self.emitter.emit_string("<"); + self.state = State::ScriptDataDoubleEscapeStart; + self.unread_char(Some(x)); + ControlToken::Continue + } + c => { + self.emitter.emit_string("<"); + self.state = State::ScriptDataEscaped; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataEscapedEndTagOpen => match self.read_char() { + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.init_end_tag(); + self.state = State::ScriptDataEscapedEndTagName; + self.unread_char(Some(x)); + ControlToken::Continue + } + c => { + self.emitter.emit_string("</"); + self.unread_char(c); + self.state = State::ScriptDataEscaped; + ControlToken::Continue + } + }, + State::ScriptDataEscapedEndTagName => match self.read_char() { + Some(whitespace_pat!()) if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::BeforeAttributeName; + ControlToken::Continue + } + Some('/') if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::SelfClosingStartTag; + ControlToken::Continue + } + Some('>') if self.emitter.current_is_appropriate_end_tag_token() => { + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + Some(x) if x.is_ascii_alphabetic() => { + self.emitter.push_tag_name(ctostr!(x.to_ascii_lowercase())); + self.temporary_buffer.push(x); + ControlToken::Continue + } + c => { + self.emitter.emit_string("</"); + self.flush_buffer_characters(); + self.state = State::ScriptDataEscaped; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataDoubleEscapeStart => match self.read_char() { + Some(x @ whitespace_pat!() | x @ '/' | x @ '>') => { + if self.temporary_buffer == "script" { + self.state = State::ScriptDataDoubleEscaped; + } else { + self.state = State::ScriptDataEscaped; + } + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + Some(x) if x.is_ascii_alphabetic() => { + self.temporary_buffer.push(x.to_ascii_lowercase()); + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + c => { + self.state = State::ScriptDataEscaped; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataDoubleEscaped => match self.read_char() { + Some('-') => { + self.state = State::ScriptDataDoubleEscapedDash; + self.emitter.emit_string("-"); + ControlToken::Continue + } + Some('<') => { + self.state = State::ScriptDataDoubleEscapedLessThanSign; + self.emitter.emit_string("<"); + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter + .emit_error(Error::EofInScriptHtmlCommentLikeText); + ControlToken::Eof + } + Some(x) => { + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + }, + State::ScriptDataDoubleEscapedDash => match self.read_char() { + Some('-') => { + self.state = State::ScriptDataDoubleEscapedDashDash; + self.emitter.emit_string("-"); + ControlToken::Continue + } + Some('<') => { + self.state = State::ScriptDataDoubleEscapedLessThanSign; + self.emitter.emit_string("<"); + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.state = State::ScriptDataDoubleEscaped; + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter + .emit_error(Error::EofInScriptHtmlCommentLikeText); + ControlToken::Eof + } + Some(x) => { + self.state = State::ScriptDataDoubleEscaped; + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + }, + State::ScriptDataDoubleEscapedDashDash => match self.read_char() { + Some('-') => { + self.emitter.emit_string("-"); + ControlToken::Continue + } + Some('<') => { + self.emitter.emit_string("<"); + self.state = State::ScriptDataDoubleEscapedLessThanSign; + ControlToken::Continue + } + Some('>') => { + self.emitter.emit_string(">"); + self.state = State::ScriptData; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.state = State::ScriptDataDoubleEscaped; + self.emitter.emit_string("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter + .emit_error(Error::EofInScriptHtmlCommentLikeText); + ControlToken::Eof + } + Some(x) => { + self.state = State::ScriptDataDoubleEscaped; + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + }, + State::ScriptDataDoubleEscapedLessThanSign => match self.read_char() { + Some('/') => { + self.temporary_buffer.clear(); + self.state = State::ScriptDataDoubleEscapeEnd; + self.emitter.emit_string("/"); + ControlToken::Continue + } + c => { + self.state = State::ScriptDataDoubleEscaped; + self.unread_char(c); + ControlToken::Continue + } + }, + State::ScriptDataDoubleEscapeEnd => match self.read_char() { + Some(x @ whitespace_pat!() | x @ '/' | x @ '>') => { + if self.temporary_buffer == "script" { + self.state = State::ScriptDataEscaped; + } else { + self.state = State::ScriptDataDoubleEscaped; + } + + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + Some(x) if x.is_ascii_alphabetic() => { + self.temporary_buffer.push(x.to_ascii_lowercase()); + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + c => { + self.state = State::ScriptDataDoubleEscaped; + self.unread_char(c); + ControlToken::Continue + } + }, + State::BeforeAttributeName => match self.read_char() { + Some(whitespace_pat!()) => ControlToken::Continue, + c @ Some('/' | '>') | c @ None => { + self.state = State::AfterAttributeName; + self.unread_char(c); + ControlToken::Continue + } + Some('=') => { + self.emitter + .emit_error(Error::UnexpectedEqualsSignBeforeAttributeName); + self.emitter.init_attribute(); + self.emitter.push_attribute_name("="); + self.state = State::AttributeName; + ControlToken::Continue + } + Some(x) => { + self.emitter.init_attribute(); + self.state = State::AttributeName; + self.unread_char(Some(x)); + ControlToken::Continue + } + }, + State::AttributeName => match self.read_char() { + c @ Some(whitespace_pat!() | '/' | '>') | c @ None => { + self.state = State::AfterAttributeName; + self.unread_char(c); + ControlToken::Continue + } + Some('=') => { + self.state = State::BeforeAttributeValue; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_attribute_name("\u{fffd}"); + ControlToken::Continue + } + Some(x @ '"' | x @ '\'' | x @ '<') => { + self.emitter + .emit_error(Error::UnexpectedCharacterInAttributeName); + self.emitter + .push_attribute_name(ctostr!(x.to_ascii_lowercase())); + ControlToken::Continue + } + Some(x) => { + self.emitter + .push_attribute_name(ctostr!(x.to_ascii_lowercase())); + ControlToken::Continue + } + }, + State::AfterAttributeName => match self.read_char() { + Some(whitespace_pat!()) => ControlToken::Continue, + Some('/') => { + self.state = State::SelfClosingStartTag; + ControlToken::Continue + } + Some('=') => { + self.state = State::BeforeAttributeValue; + ControlToken::Continue + } + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInTag); + ControlToken::Eof + } + Some(x) => { + self.emitter.init_attribute(); + self.state = State::AttributeName; + self.unread_char(Some(x)); + ControlToken::Continue + } + }, + State::BeforeAttributeValue => match self.read_char() { + Some(whitespace_pat!()) => ControlToken::Continue, + Some('"') => { + self.state = State::AttributeValueDoubleQuoted; + ControlToken::Continue + } + Some('\'') => { + self.state = State::AttributeValueSingleQuoted; + ControlToken::Continue + } + Some('>') => { + self.emitter.emit_error(Error::MissingAttributeValue); + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + c => { + self.state = State::AttributeValueUnquoted; + self.unread_char(c); + ControlToken::Continue + } + }, + State::AttributeValueDoubleQuoted => match self.read_char() { + Some('"') => { + self.state = State::AfterAttributeValueQuoted; + ControlToken::Continue + } + Some('&') => { + self.return_state = Some(State::AttributeValueDoubleQuoted); + self.state = State::CharacterReference; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_attribute_value("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInTag); + ControlToken::Eof + } + Some(x) => { + self.emitter.push_attribute_value(ctostr!(x)); + ControlToken::Continue + } + }, + State::AttributeValueSingleQuoted => match self.read_char() { + Some('\'') => { + self.state = State::AfterAttributeValueQuoted; + ControlToken::Continue + } + Some('&') => { + self.return_state = Some(State::AttributeValueSingleQuoted); + self.state = State::CharacterReference; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_attribute_value("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInTag); + ControlToken::Eof + } + Some(x) => { + self.emitter.push_attribute_value(ctostr!(x)); + ControlToken::Continue + } + }, + State::AttributeValueUnquoted => match self.read_char() { + Some(whitespace_pat!()) => { + self.state = State::BeforeAttributeName; + ControlToken::Continue + } + Some('&') => { + self.return_state = Some(State::AttributeValueUnquoted); + self.state = State::CharacterReference; + ControlToken::Continue + } + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_attribute_value("\u{fffd}"); + ControlToken::Continue + } + Some(x @ '"' | x @ '\'' | x @ '<' | x @ '=' | x @ '\u{60}') => { + self.emitter + .emit_error(Error::UnexpectedCharacterInUnquotedAttributeValue); + self.emitter.push_attribute_value(ctostr!(x)); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInTag); + ControlToken::Eof + } + Some(x) => { + self.emitter.push_attribute_value(ctostr!(x)); + ControlToken::Continue + } + }, + State::AfterAttributeValueQuoted => match self.read_char() { + Some(whitespace_pat!()) => { + self.state = State::BeforeAttributeName; + ControlToken::Continue + } + Some('/') => { + self.state = State::SelfClosingStartTag; + ControlToken::Continue + } + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInTag); + ControlToken::Eof + } + Some(x) => { + self.emitter + .emit_error(Error::MissingWhitespaceBetweenAttributes); + self.state = State::BeforeAttributeName; + self.unread_char(Some(x)); + ControlToken::Continue + } + }, + State::SelfClosingStartTag => match self.read_char() { + Some('>') => { + self.emitter.set_self_closing(); + self.state = State::Data; + self.emitter.emit_current_tag(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInTag); + ControlToken::Eof + } + Some(x) => { + self.emitter.emit_error(Error::UnexpectedSolidusInTag); + self.state = State::BeforeAttributeName; + self.unread_char(Some(x)); + ControlToken::Continue + } + }, + State::BogusComment => match self.read_char() { + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_comment(); + ControlToken::Continue + } + None => { + self.emitter.emit_current_comment(); + ControlToken::Eof + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_comment("\u{fffd}"); + ControlToken::Continue + } + Some(x) => { + self.emitter.push_comment(ctostr!(x)); + ControlToken::Continue + } + }, + State::MarkupDeclarationOpen => match self.read_char() { + Some('-') if self.try_read_string("-", true) => { + self.emitter.init_comment(); + self.state = State::CommentStart; + ControlToken::Continue + } + Some('d' | 'D') if self.try_read_string("octype", false) => { + self.state = State::Doctype; + ControlToken::Continue + } + Some('[') if self.try_read_string("CDATA[", true) => { + // missing: check for adjusted current element: we don't have an element stack + // at all + // + // missing: cdata transition + // + // let's hope that bogus comment can just sort of skip over cdata + self.emitter.emit_error(Error::CdataInHtmlContent); + + self.emitter.init_comment(); + self.emitter.push_comment("[CDATA["); + self.state = State::BogusComment; + ControlToken::Continue + } + c => { + self.emitter.emit_error(Error::IncorrectlyOpenedComment); + self.emitter.init_comment(); + self.state = State::BogusComment; + self.unread_char(c); + ControlToken::Continue + } + }, + State::CommentStart => match self.read_char() { + Some('-') => { + self.state = State::CommentStartDash; + ControlToken::Continue + } + Some('>') => { + self.emitter.emit_error(Error::AbruptClosingOfEmptyComment); + self.state = State::Data; + self.emitter.emit_current_comment(); + ControlToken::Continue + } + c => { + self.unread_char(c); + self.state = State::Comment; + ControlToken::Continue + } + }, + State::CommentStartDash => match self.read_char() { + Some('-') => { + self.state = State::CommentEnd; + ControlToken::Continue + } + Some('>') => { + self.emitter.emit_error(Error::AbruptClosingOfEmptyComment); + self.state = State::Data; + self.emitter.emit_current_comment(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInComment); + self.emitter.emit_current_comment(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter.push_comment("-"); + self.unread_char(c); + self.state = State::Comment; + ControlToken::Continue + } + }, + State::Comment => match self.read_char() { + Some('<') => { + self.emitter.push_comment("<"); + self.state = State::CommentLessThanSign; + ControlToken::Continue + } + Some('-') => { + self.state = State::CommentEndDash; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_comment("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInComment); + self.emitter.emit_current_comment(); + ControlToken::Eof + } + Some(x) => { + self.emitter.push_comment(ctostr!(x)); + ControlToken::Continue + } + }, + State::CommentLessThanSign => match self.read_char() { + Some('!') => { + self.emitter.push_comment("!"); + self.state = State::CommentLessThanSignBang; + ControlToken::Continue + } + Some('<') => { + self.emitter.push_comment("<"); + ControlToken::Continue + } + c => { + self.unread_char(c); + self.state = State::Comment; + ControlToken::Continue + } + }, + State::CommentLessThanSignBang => match self.read_char() { + Some('-') => { + self.state = State::CommentLessThanSignBangDash; + ControlToken::Continue + } + c => { + self.unread_char(c); + self.state = State::Comment; + ControlToken::Continue + } + }, + State::CommentLessThanSignBangDash => match self.read_char() { + Some('-') => { + self.state = State::CommentLessThanSignBangDashDash; + ControlToken::Continue + } + c => { + self.unread_char(c); + self.state = State::CommentEndDash; + ControlToken::Continue + } + }, + State::CommentLessThanSignBangDashDash => match self.read_char() { + c @ Some('>') | c @ None => { + self.unread_char(c); + self.state = State::CommentEnd; + ControlToken::Continue + } + c => { + self.emitter.emit_error(Error::NestedComment); + self.unread_char(c); + self.state = State::CommentEnd; + ControlToken::Continue + } + }, + State::CommentEndDash => match self.read_char() { + Some('-') => { + self.state = State::CommentEnd; + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInComment); + self.emitter.emit_current_comment(); + ControlToken::Eof + } + c => { + self.emitter.push_comment("-"); + self.unread_char(c); + self.state = State::Comment; + ControlToken::Continue + } + }, + State::CommentEnd => match self.read_char() { + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_comment(); + ControlToken::Continue + } + Some('!') => { + self.state = State::CommentEndBang; + ControlToken::Continue + } + Some('-') => { + self.emitter.push_comment("-"); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInComment); + self.emitter.emit_current_comment(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter.push_comment("-"); + self.emitter.push_comment("-"); + self.unread_char(c); + self.state = State::Comment; + ControlToken::Continue + } + }, + State::CommentEndBang => match self.read_char() { + Some('-') => { + self.emitter.push_comment("-"); + self.emitter.push_comment("-"); + self.emitter.push_comment("!"); + self.state = State::CommentEndDash; + ControlToken::Continue + } + Some('>') => { + self.emitter.emit_error(Error::IncorrectlyClosedComment); + self.state = State::Data; + self.emitter.emit_current_comment(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInComment); + self.emitter.emit_current_comment(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter.push_comment("-"); + self.emitter.push_comment("-"); + self.emitter.push_comment("!"); + self.state = State::Comment; + self.unread_char(c); + ControlToken::Continue + } + }, + State::Doctype => match self.read_char() { + Some(whitespace_pat!()) => { + self.state = State::BeforeDoctypeName; + ControlToken::Continue + } + c @ Some('>') => { + self.unread_char(c); + self.state = State::BeforeDoctypeName; + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.init_doctype(); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter + .emit_error(Error::MissingWhitespaceBeforeDoctypeName); + self.unread_char(c); + self.state = State::BeforeDoctypeName; + ControlToken::Continue + } + }, + State::BeforeDoctypeName => match self.read_char() { + Some(whitespace_pat!()) => ControlToken::Continue, + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.init_doctype(); + self.emitter.push_doctype_name("\u{fffd}"); + self.state = State::DoctypeName; + ControlToken::Continue + } + Some('>') => { + self.emitter.emit_error(Error::MissingDoctypeName); + self.emitter.init_doctype(); + self.emitter.set_force_quirks(); + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.init_doctype(); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + Some(x) => { + self.emitter.init_doctype(); + self.emitter + .push_doctype_name(ctostr!(x.to_ascii_lowercase())); + self.state = State::DoctypeName; + ControlToken::Continue + } + }, + State::DoctypeName => match self.read_char() { + Some(whitespace_pat!()) => { + self.state = State::AfterDoctypeName; + ControlToken::Continue + } + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_doctype_name("\u{fffd}"); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + Some(x) => { + self.emitter + .push_doctype_name(ctostr!(x.to_ascii_lowercase())); + ControlToken::Continue + } + }, + State::AfterDoctypeName => match self.read_char() { + Some(whitespace_pat!()) => ControlToken::Continue, + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + Some('p' | 'P') if self.try_read_string("ublic", false) => { + self.state = State::AfterDoctypePublicKeyword; + ControlToken::Continue + } + Some('s' | 'S') if self.try_read_string("ystem", false) => { + self.state = State::AfterDoctypeSystemKeyword; + ControlToken::Continue + } + c @ Some(_) => { + self.emitter + .emit_error(Error::InvalidCharacterSequenceAfterDoctypeName); + self.emitter.set_force_quirks(); + self.unread_char(c); + self.state = State::BogusDoctype; + ControlToken::Continue + } + }, + State::AfterDoctypePublicKeyword => match self.read_char() { + Some(whitespace_pat!()) => { + self.state = State::BeforeDoctypePublicIdentifier; + ControlToken::Continue + } + Some('"') => { + self.emitter + .emit_error(Error::MissingWhitespaceAfterDoctypePublicKeyword); + self.emitter.set_doctype_public_identifier(""); + self.state = State::DoctypePublicIdentifierDoubleQuoted; + ControlToken::Continue + } + Some('\'') => { + self.emitter + .emit_error(Error::MissingWhitespaceAfterDoctypePublicKeyword); + self.emitter.set_doctype_public_identifier(""); + self.state = State::DoctypePublicIdentifierSingleQuoted; + ControlToken::Continue + } + Some('>') => { + self.emitter + .emit_error(Error::MissingDoctypePublicIdentifier); + self.emitter.set_force_quirks(); + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter + .emit_error(Error::MissingQuoteBeforeDoctypePublicIdentifier); + self.emitter.set_force_quirks(); + self.unread_char(c); + self.state = State::BogusDoctype; + ControlToken::Continue + } + }, + State::BeforeDoctypePublicIdentifier => match self.read_char() { + Some(whitespace_pat!()) => ControlToken::Continue, + Some('"') => { + self.emitter.set_doctype_public_identifier(""); + self.state = State::DoctypePublicIdentifierDoubleQuoted; + ControlToken::Continue + } + Some('\'') => { + self.emitter.set_doctype_public_identifier(""); + self.state = State::DoctypePublicIdentifierSingleQuoted; + ControlToken::Continue + } + Some('>') => { + self.emitter + .emit_error(Error::MissingDoctypePublicIdentifier); + self.emitter.set_force_quirks(); + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter + .emit_error(Error::MissingQuoteBeforeDoctypePublicIdentifier); + self.emitter.set_force_quirks(); + self.unread_char(c); + self.state = State::BogusDoctype; + ControlToken::Continue + } + }, + State::DoctypePublicIdentifierDoubleQuoted => match self.read_char() { + Some('"') => { + self.state = State::AfterDoctypePublicIdentifier; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_doctype_public_identifier("\u{fffd}"); + ControlToken::Continue + } + Some('>') => { + self.emitter + .emit_error(Error::AbruptDoctypePublicIdentifier); + self.emitter.set_force_quirks(); + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + Some(x) => { + self.emitter.push_doctype_public_identifier(ctostr!(x)); + ControlToken::Continue + } + }, + State::DoctypePublicIdentifierSingleQuoted => match self.read_char() { + Some('\'') => { + self.state = State::AfterDoctypePublicIdentifier; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_doctype_public_identifier("\u{fffd}"); + ControlToken::Continue + } + Some('>') => { + self.emitter + .emit_error(Error::AbruptDoctypePublicIdentifier); + self.emitter.set_force_quirks(); + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + Some(x) => { + self.emitter.push_doctype_public_identifier(ctostr!(x)); + ControlToken::Continue + } + }, + State::AfterDoctypePublicIdentifier => match self.read_char() { + Some(whitespace_pat!()) => { + self.state = State::BetweenDoctypePublicAndSystemIdentifiers; + ControlToken::Continue + } + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + Some('"') => { + self.emitter.emit_error( + Error::MissingWhitespaceBetweenDoctypePublicAndSystemIdentifiers, + ); + self.emitter.set_doctype_system_identifier(""); + self.state = State::DoctypeSystemIdentifierDoubleQuoted; + ControlToken::Continue + } + Some('\'') => { + self.emitter.emit_error( + Error::MissingWhitespaceBetweenDoctypePublicAndSystemIdentifiers, + ); + self.emitter.set_doctype_system_identifier(""); + self.state = State::DoctypeSystemIdentifierSingleQuoted; + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter + .emit_error(Error::MissingQuoteBeforeDoctypeSystemIdentifier); + self.emitter.set_force_quirks(); + self.unread_char(c); + self.state = State::BogusDoctype; + ControlToken::Continue + } + }, + State::BetweenDoctypePublicAndSystemIdentifiers => match self.read_char() { + Some(whitespace_pat!()) => ControlToken::Continue, + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + Some('"') => { + self.emitter.set_doctype_system_identifier(""); + self.state = State::DoctypeSystemIdentifierDoubleQuoted; + ControlToken::Continue + } + Some('\'') => { + self.emitter.set_doctype_system_identifier(""); + self.state = State::DoctypeSystemIdentifierSingleQuoted; + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter + .emit_error(Error::MissingQuoteBeforeDoctypeSystemIdentifier); + self.emitter.set_force_quirks(); + self.state = State::BogusDoctype; + self.unread_char(c); + ControlToken::Continue + } + }, + State::AfterDoctypeSystemKeyword => match self.read_char() { + Some(whitespace_pat!()) => { + self.state = State::BeforeDoctypeSystemIdentifier; + ControlToken::Continue + } + Some('"') => { + self.emitter + .emit_error(Error::MissingWhitespaceAfterDoctypeSystemKeyword); + self.emitter.set_doctype_system_identifier(""); + self.state = State::DoctypeSystemIdentifierDoubleQuoted; + ControlToken::Continue + } + Some('\'') => { + self.emitter + .emit_error(Error::MissingWhitespaceAfterDoctypeSystemKeyword); + self.emitter.set_doctype_system_identifier(""); + self.state = State::DoctypeSystemIdentifierSingleQuoted; + ControlToken::Continue + } + Some('>') => { + self.emitter + .emit_error(Error::MissingDoctypeSystemIdentifier); + self.emitter.set_force_quirks(); + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter + .emit_error(Error::MissingQuoteBeforeDoctypeSystemIdentifier); + self.emitter.set_force_quirks(); + self.state = State::BogusDoctype; + self.unread_char(c); + ControlToken::Continue + } + }, + State::BeforeDoctypeSystemIdentifier => match self.read_char() { + Some(whitespace_pat!()) => ControlToken::Continue, + Some('"') => { + self.emitter.set_doctype_system_identifier(""); + self.state = State::DoctypeSystemIdentifierDoubleQuoted; + ControlToken::Continue + } + Some('\'') => { + self.emitter.set_doctype_system_identifier(""); + self.state = State::DoctypeSystemIdentifierSingleQuoted; + ControlToken::Continue + } + Some('>') => { + self.emitter + .emit_error(Error::MissingDoctypeSystemIdentifier); + self.emitter.set_force_quirks(); + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter + .emit_error(Error::MissingQuoteBeforeDoctypeSystemIdentifier); + self.emitter.set_force_quirks(); + self.state = State::BogusDoctype; + self.unread_char(c); + ControlToken::Continue + } + }, + State::DoctypeSystemIdentifierDoubleQuoted => match self.read_char() { + Some('"') => { + self.state = State::AfterDoctypeSystemIdentifier; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_doctype_system_identifier("\u{fffd}"); + ControlToken::Continue + } + Some('>') => { + self.emitter + .emit_error(Error::AbruptDoctypeSystemIdentifier); + self.emitter.set_force_quirks(); + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + Some(x) => { + self.emitter.push_doctype_system_identifier(ctostr!(x)); + ControlToken::Continue + } + }, + State::DoctypeSystemIdentifierSingleQuoted => match self.read_char() { + Some('\'') => { + self.state = State::AfterDoctypeSystemIdentifier; + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + self.emitter.push_doctype_system_identifier("\u{fffd}"); + ControlToken::Continue + } + Some('>') => { + self.emitter + .emit_error(Error::AbruptDoctypeSystemIdentifier); + self.emitter.set_force_quirks(); + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + Some(x) => { + self.emitter.push_doctype_system_identifier(ctostr!(x)); + ControlToken::Continue + } + }, + State::AfterDoctypeSystemIdentifier => match self.read_char() { + Some(whitespace_pat!()) => ControlToken::Continue, + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInDoctype); + self.emitter.set_force_quirks(); + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + c @ Some(_) => { + self.emitter + .emit_error(Error::UnexpectedCharacterAfterDoctypeSystemIdentifier); + self.unread_char(c); + self.state = State::BogusDoctype; + ControlToken::Continue + } + }, + State::BogusDoctype => match self.read_char() { + Some('>') => { + self.state = State::Data; + self.emitter.emit_current_doctype(); + ControlToken::Continue + } + Some('\0') => { + self.emitter.emit_error(Error::UnexpectedNullCharacter); + ControlToken::Continue + } + None => { + self.emitter.emit_current_doctype(); + ControlToken::Eof + } + Some(_) => ControlToken::Continue, + }, + State::CdataSection => match self.read_char() { + Some(']') => { + self.state = State::CdataSectionBracket; + ControlToken::Continue + } + None => { + self.emitter.emit_error(Error::EofInCdata); + ControlToken::Eof + } + Some(x) => { + self.emitter.emit_string(ctostr!(x)); + ControlToken::Continue + } + }, + State::CdataSectionBracket => match self.read_char() { + Some(']') => { + self.state = State::CdataSectionEnd; + ControlToken::Continue + } + c => { + self.emitter.emit_string("]"); + self.state = State::CdataSection; + self.unread_char(c); + ControlToken::Continue + } + }, + State::CdataSectionEnd => match self.read_char() { + Some(']') => { + self.emitter.emit_string("]"); + ControlToken::Continue + } + Some('>') => { + self.state = State::Data; + ControlToken::Continue + } + c => { + self.emitter.emit_string("]]"); + self.unread_char(c); + self.state = State::CdataSection; + ControlToken::Continue + } + }, + State::CharacterReference => { + self.temporary_buffer.clear(); + self.temporary_buffer.push('&'); + match self.read_char() { + Some(x) if x.is_ascii_alphanumeric() => { + self.unread_char(Some(x)); + self.state = State::NamedCharacterReference; + ControlToken::Continue + } + Some('#') => { + self.temporary_buffer.push('#'); + self.state = State::NumericCharacterReference; + ControlToken::Continue + } + c => { + self.flush_code_points_consumed_as_character_reference(); + self.state = self.return_state.take().unwrap(); + self.unread_char(c); + ControlToken::Continue + } + } + } + State::NamedCharacterReference => { + let c = self.read_char(); + + let char_ref = c.and_then(|x| { + Some(( + x, + entities::try_read_character_reference(x, |x| { + self.try_read_string(x, true) + })?, + )) + }); + + if let Some((x, char_ref)) = char_ref { + self.temporary_buffer.push(x); + self.temporary_buffer.push_str(char_ref.name); + let char_ref_name_last_character = char_ref.name.chars().last(); + let next_character = self.next_input_character(); + if self.is_consumed_as_part_of_an_attribute() + && char_ref_name_last_character != Some(';') + && matches!(next_character, Some(x) if x == '=' || x.is_ascii_alphanumeric()) + { + self.flush_code_points_consumed_as_character_reference(); + self.state = self.return_state.take().unwrap(); + ControlToken::Continue + } else { + if char_ref_name_last_character != Some(';') { + self.emitter + .emit_error(Error::MissingSemicolonAfterCharacterReference); + } + + self.temporary_buffer.clear(); + self.temporary_buffer.push_str(char_ref.characters); + self.flush_code_points_consumed_as_character_reference(); + self.state = self.return_state.take().unwrap(); + ControlToken::Continue + } + } else { + self.unread_char(c); + self.flush_code_points_consumed_as_character_reference(); + self.state = State::AmbiguousAmpersand; + ControlToken::Continue + } + } + State::AmbiguousAmpersand => match self.read_char() { + Some(x) if x.is_ascii_alphanumeric() => { + if self.is_consumed_as_part_of_an_attribute() { + self.emitter.push_attribute_value(ctostr!(x)); + } else { + self.emitter.emit_string(ctostr!(x)); + } + + ControlToken::Continue + } + c @ Some(';') => { + self.emitter + .emit_error(Error::UnknownNamedCharacterReference); + self.unread_char(c); + self.state = self.return_state.take().unwrap(); + ControlToken::Continue + } + c => { + self.unread_char(c); + self.state = self.return_state.take().unwrap(); + ControlToken::Continue + } + }, + State::NumericCharacterReference => { + self.character_reference_code = 0; + match self.read_char() { + Some(x @ 'x' | x @ 'X') => { + self.temporary_buffer.push(x); + self.state = State::HexadecimalCharacterReferenceStart; + ControlToken::Continue + } + c => { + self.unread_char(c); + self.state = State::DecimalCharacterReferenceStart; + ControlToken::Continue + } + } + } + State::HexadecimalCharacterReferenceStart => match self.read_char() { + c @ Some('0'..='9' | 'A'..='F' | 'a'..='f') => { + self.unread_char(c); + self.state = State::HexadecimalCharacterReference; + ControlToken::Continue + } + c => { + self.emitter + .emit_error(Error::AbsenceOfDigitsInNumericCharacterReference); + self.flush_code_points_consumed_as_character_reference(); + self.unread_char(c); + self.state = self.return_state.take().unwrap(); + ControlToken::Continue + } + }, + State::DecimalCharacterReferenceStart => match self.read_char() { + Some(x @ ascii_digit_pat!()) => { + self.unread_char(Some(x)); + self.state = State::DecimalCharacterReference; + ControlToken::Continue + } + c => { + self.emitter + .emit_error(Error::AbsenceOfDigitsInNumericCharacterReference); + self.flush_code_points_consumed_as_character_reference(); + self.unread_char(c); + self.state = self.return_state.take().unwrap(); + ControlToken::Continue + } + }, + State::HexadecimalCharacterReference => match self.read_char() { + Some(x @ ascii_digit_pat!()) => { + mutate_character_reference!(*16 + x - 0x0030); + ControlToken::Continue + } + Some(x @ 'A'..='F') => { + mutate_character_reference!(*16 + x - 0x0037); + ControlToken::Continue + } + Some(x @ 'a'..='f') => { + mutate_character_reference!(*16 + x - 0x0057); + ControlToken::Continue + } + Some(';') => { + self.state = State::NumericCharacterReferenceEnd; + ControlToken::Continue + } + c => { + self.emitter + .emit_error(Error::MissingSemicolonAfterCharacterReference); + self.unread_char(c); + self.state = State::NumericCharacterReferenceEnd; + ControlToken::Continue + } + }, + State::DecimalCharacterReference => match self.read_char() { + Some(x @ ascii_digit_pat!()) => { + mutate_character_reference!(*10 + x - 0x0030); + ControlToken::Continue + } + Some(';') => { + self.state = State::NumericCharacterReferenceEnd; + ControlToken::Continue + } + c => { + self.emitter + .emit_error(Error::MissingSemicolonAfterCharacterReference); + self.unread_char(c); + self.state = State::NumericCharacterReferenceEnd; + ControlToken::Continue + } + }, + State::NumericCharacterReferenceEnd => { + match self.character_reference_code { + 0x00 => { + self.emitter.emit_error(Error::NullCharacterReference); + self.character_reference_code = 0xfffd; + } + 0x110000.. => { + self.emitter + .emit_error(Error::CharacterReferenceOutsideUnicodeRange); + self.character_reference_code = 0xfffd; + } + surrogate_pat!() => { + self.emitter.emit_error(Error::SurrogateCharacterReference); + self.character_reference_code = 0xfffd; + } + // noncharacter + noncharacter_pat!() => { + self.emitter + .emit_error(Error::NoncharacterCharacterReference); + } + // 0x000d, or a control that is not whitespace + x @ 0x000d | x @ control_pat!() + if !matches!(x, 0x0009 | 0x000a | 0x000c | 0x0020) => + { + self.emitter.emit_error(Error::ControlCharacterReference); + self.character_reference_code = match x { + 0x80 => 0x20AC, // EURO SIGN (€) + 0x82 => 0x201A, // SINGLE LOW-9 QUOTATION MARK (‚) + 0x83 => 0x0192, // LATIN SMALL LETTER F WITH HOOK (ƒ) + 0x84 => 0x201E, // DOUBLE LOW-9 QUOTATION MARK („) + 0x85 => 0x2026, // HORIZONTAL ELLIPSIS (…) + 0x86 => 0x2020, // DAGGER (†) + 0x87 => 0x2021, // DOUBLE DAGGER (‡) + 0x88 => 0x02C6, // MODIFIER LETTER CIRCUMFLEX ACCENT (ˆ) + 0x89 => 0x2030, // PER MILLE SIGN (‰) + 0x8A => 0x0160, // LATIN CAPITAL LETTER S WITH CARON (Š) + 0x8B => 0x2039, // SINGLE LEFT-POINTING ANGLE QUOTATION MARK (‹) + 0x8C => 0x0152, // LATIN CAPITAL LIGATURE OE (Œ) + 0x8E => 0x017D, // LATIN CAPITAL LETTER Z WITH CARON (Ž) + 0x91 => 0x2018, // LEFT SINGLE QUOTATION MARK (‘) + 0x92 => 0x2019, // RIGHT SINGLE QUOTATION MARK (’) + 0x93 => 0x201C, // LEFT DOUBLE QUOTATION MARK (“) + 0x94 => 0x201D, // RIGHT DOUBLE QUOTATION MARK (”) + 0x95 => 0x2022, // BULLET (•) + 0x96 => 0x2013, // EN DASH (–) + 0x97 => 0x2014, // EM DASH (—) + 0x98 => 0x02DC, // SMALL TILDE (˜) + 0x99 => 0x2122, // TRADE MARK SIGN (™) + 0x9A => 0x0161, // LATIN SMALL LETTER S WITH CARON (š) + 0x9B => 0x203A, // SINGLE RIGHT-POINTING ANGLE QUOTATION MARK (›) + 0x9C => 0x0153, // LATIN SMALL LIGATURE OE (œ) + 0x9E => 0x017E, // LATIN SMALL LETTER Z WITH CARON (ž) + 0x9F => 0x0178, // LATIN CAPITAL LETTER Y WITH DIAERESIS (Ÿ) + _ => self.character_reference_code, + }; + } + _ => (), + } + + self.temporary_buffer.clear(); + self.temporary_buffer + .push(std::char::from_u32(self.character_reference_code).unwrap()); + self.flush_code_points_consumed_as_character_reference(); + self.state = self.return_state.take().unwrap(); + ControlToken::Continue + } + } + } +} + +impl<R: Reader, E: Emitter> Iterator for Tokenizer<R, E> { + type Item = E::Token; + + fn next(&mut self) -> Option<Self::Item> { + loop { + if let Some(token) = self.emitter.pop_token() { + break Some(token); + } else if !self.eof { + match self.consume() { + ControlToken::Continue => (), + ControlToken::Eof => { + self.eof = true; + self.emitter.emit_eof(); + } + } + } else { + break None; + } + } + } +} |