= None;
// let mut slurp_all_line_endings = false;
while index < events.len() {
let event = &events[index];
if event.event_type == EventType::Exit
&& (event.token_type == TokenType::BlankLineEnding
|| event.token_type == TokenType::CodeTextLineEnding
|| event.token_type == TokenType::LineEnding)
{
let codes = codes_from_span(codes, &from_exit_event(events, index));
line_ending_inferred = Some(LineEnding::from_code(*codes.first().unwrap()));
break;
}
index += 1;
}
let line_ending_default = if let Some(value) = line_ending_inferred {
value
} else if let Some(value) = &options.default_line_ending {
value.clone()
} else {
LineEnding::LineFeed
};
index = 0;
while index < events.len() {
let event = &events[index];
let token_type = &event.token_type;
match event.event_type {
EventType::Enter => match token_type {
TokenType::Autolink
| TokenType::AutolinkEmail
| TokenType::AutolinkMarker
| TokenType::AutolinkProtocol
| TokenType::BlankLineEnding
| TokenType::CharacterEscape
| TokenType::CharacterEscapeMarker
| TokenType::CharacterEscapeValue
| TokenType::CharacterReference
| TokenType::CharacterReferenceMarker
| TokenType::CharacterReferenceMarkerHexadecimal
| TokenType::CharacterReferenceMarkerNumeric
| TokenType::CharacterReferenceMarkerSemi
| TokenType::CharacterReferenceValue
| TokenType::CodeFencedFence
| TokenType::CodeFencedFenceSequence
| TokenType::CodeFlowChunk
| TokenType::CodeTextData
| TokenType::CodeTextLineEnding
| TokenType::CodeTextSequence
| TokenType::Data
| TokenType::DefinitionLabel
| TokenType::DefinitionLabelMarker
| TokenType::DefinitionLabelString
| TokenType::DefinitionMarker
| TokenType::DefinitionDestination
| TokenType::DefinitionDestinationLiteral
| TokenType::DefinitionDestinationLiteralMarker
| TokenType::DefinitionDestinationRaw
| TokenType::DefinitionDestinationString
| TokenType::DefinitionTitle
| TokenType::DefinitionTitleMarker
| TokenType::DefinitionTitleString
| TokenType::HardBreakEscape
| TokenType::HardBreakEscapeMarker
| TokenType::HardBreakTrailing
| TokenType::HardBreakTrailingSpace
| TokenType::HeadingAtx
| TokenType::HeadingAtxSequence
| TokenType::HeadingAtxSpaceOrTab
| TokenType::HeadingSetext
| TokenType::HeadingSetextUnderline
| TokenType::HtmlFlowData
| TokenType::HtmlTextData
| TokenType::LineEnding
| TokenType::ThematicBreak
| TokenType::ThematicBreakSequence
| TokenType::SpaceOrTab => {
// Ignore.
}
TokenType::CodeFencedFenceInfo
| TokenType::CodeFencedFenceMeta
| TokenType::Definition
| TokenType::HeadingAtxText
| TokenType::HeadingSetextText => {
buffer(buffers);
}
TokenType::CodeIndented => {
code_flow_seen_data = Some(false);
line_ending_if_needed(buffers, &line_ending_default);
buf_tail_mut(buffers).push("".to_string());
}
TokenType::CodeFenced => {
code_flow_seen_data = Some(false);
line_ending_if_needed(buffers, &line_ending_default);
// Note that no `>` is used, which is added later.
buf_tail_mut(buffers).push(" {
buf_tail_mut(buffers).push("".to_string());
buffer(buffers);
}
TokenType::HtmlFlow => {
line_ending_if_needed(buffers, &line_ending_default);
if options.allow_dangerous_html {
ignore_encode = true;
}
}
TokenType::HtmlText => {
if options.allow_dangerous_html {
ignore_encode = true;
}
}
TokenType::Paragraph => {
buf_tail_mut(buffers).push("".to_string());
}
#[allow(unreachable_patterns)]
_ => {
unreachable!("unhandled `enter` of TokenType {:?}", token_type)
}
},
EventType::Exit => match token_type {
TokenType::Autolink
| TokenType::AutolinkMarker
| TokenType::BlankLineEnding
| TokenType::CharacterEscape
| TokenType::CharacterEscapeMarker
| TokenType::CharacterReference
| TokenType::CharacterReferenceMarkerSemi
| TokenType::CodeFencedFenceSequence
| TokenType::CodeTextSequence
| TokenType::DefinitionLabel
| TokenType::DefinitionLabelMarker
| TokenType::DefinitionLabelString
| TokenType::DefinitionMarker
| TokenType::DefinitionDestination
| TokenType::DefinitionDestinationLiteral
| TokenType::DefinitionDestinationLiteralMarker
| TokenType::DefinitionDestinationRaw
| TokenType::DefinitionDestinationString
| TokenType::DefinitionTitle
| TokenType::DefinitionTitleMarker
| TokenType::DefinitionTitleString
| TokenType::HardBreakEscapeMarker
| TokenType::HardBreakTrailingSpace
| TokenType::HeadingSetext
| TokenType::ThematicBreakSequence
| TokenType::SpaceOrTab => {
// Ignore.
}
// Just output it.
TokenType::CodeTextData | TokenType::Data | TokenType::CharacterEscapeValue => {
// last_was_tag = false;
buf_tail_mut(buffers).push(encode(&serialize(
codes,
&from_exit_event(events, index),
false,
)));
}
TokenType::AutolinkEmail => {
let slice = serialize(codes, &from_exit_event(events, index), false);
let buf = buf_tail_mut(buffers);
buf.push(format!(
"",
sanitize_uri(slice.as_str(), &protocol_href)
));
buf.push(encode(&slice));
buf.push("".to_string());
}
TokenType::AutolinkProtocol => {
let slice = serialize(codes, &from_exit_event(events, index), false);
let buf = buf_tail_mut(buffers);
buf.push(format!(
"",
sanitize_uri(slice.as_str(), &protocol_href)
));
buf.push(encode(&slice));
buf.push("".to_string());
}
TokenType::CharacterReferenceMarker => {
character_reference_kind = Some(CharacterReferenceKind::Named);
}
TokenType::CharacterReferenceMarkerNumeric => {
character_reference_kind = Some(CharacterReferenceKind::Decimal);
}
TokenType::CharacterReferenceMarkerHexadecimal => {
character_reference_kind = Some(CharacterReferenceKind::Hexadecimal);
}
TokenType::CharacterReferenceValue => {
let kind = character_reference_kind
.expect("expected `character_reference_kind` to be set");
let reference = serialize(codes, &from_exit_event(events, index), false);
let ref_string = reference.as_str();
let value = match kind {
CharacterReferenceKind::Decimal => {
decode_numeric(ref_string, 10).to_string()
}
CharacterReferenceKind::Hexadecimal => {
decode_numeric(ref_string, 16).to_string()
}
CharacterReferenceKind::Named => decode_named(ref_string),
};
buf_tail_mut(buffers).push(encode(&value));
character_reference_kind = None;
}
TokenType::CodeFenced | TokenType::CodeIndented => {
let seen_data =
code_flow_seen_data.expect("`code_flow_seen_data` must be defined");
// To do: containers.
// One special case is if we are inside a container, and the fenced code was
// not closed (meaning it runs to the end).
// In that case, the following line ending, is considered *outside* the
// fenced code and block quote by micromark, but CM wants to treat that
// ending as part of the code.
// if fenced_count != None && fenced_count < 2 && tightStack.length > 0 && !last_was_tag {
// line_ending();
// }
// But in most cases, it’s simpler: when we’ve seen some data, emit an extra
// line ending when needed.
if seen_data {
line_ending_if_needed(buffers, &line_ending_default);
}
buf_tail_mut(buffers).push("
".to_string());
if let Some(count) = code_fenced_fences_count {
if count < 2 {
line_ending_if_needed(buffers, &line_ending_default);
}
}
code_flow_seen_data = None;
code_fenced_fences_count = None;
slurp_one_line_ending = false;
}
TokenType::CodeFencedFence => {
let count = if let Some(count) = code_fenced_fences_count {
count
} else {
0
};
if count == 0 {
buf_tail_mut(buffers).push(">".to_string());
// tag = true;
slurp_one_line_ending = true;
}
code_fenced_fences_count = Some(count + 1);
}
TokenType::CodeFencedFenceInfo => {
let value = resume(buffers);
buf_tail_mut(buffers).push(format!(" class=\"language-{}\"", value));
// tag = true;
}
TokenType::CodeFencedFenceMeta => {
resume(buffers);
}
TokenType::CodeFlowChunk => {
code_flow_seen_data = Some(true);
buf_tail_mut(buffers).push(encode(&serialize(
codes,
&from_exit_event(events, index),
false,
)));
}
TokenType::CodeText => {
let result = resume(buffers);
let mut chars = result.chars();
let mut trim = false;
if Some(' ') == chars.next() && Some(' ') == chars.next_back() {
let mut next = chars.next();
while next != None && !trim {
if Some(' ') != next {
trim = true;
}
next = chars.next();
}
}
buf_tail_mut(buffers).push(if trim {
result[1..(result.len() - 1)].to_string()
} else {
result
});
buf_tail_mut(buffers).push("".to_string());
}
TokenType::CodeTextLineEnding => {
buf_tail_mut(buffers).push(" ".to_string());
}
TokenType::Definition => {
resume(buffers);
slurp_one_line_ending = true;
}
TokenType::HardBreakEscape | TokenType::HardBreakTrailing => {
buf_tail_mut(buffers).push("
".to_string());
}
TokenType::HeadingAtx => {
let rank = atx_opening_sequence_size
.expect("`atx_opening_sequence_size` must be set in headings");
buf_tail_mut(buffers).push(format!("", rank));
atx_opening_sequence_size = None;
atx_heading_buffer = None;
}
// `HeadingAtxSpaceOrTab` is ignored after the opening sequence,
// before the closing sequence, and after the closing sequence.
// But it is used around intermediate sequences.
// `atx_heading_buffer` is set to `Some` by the first `HeadingAtxText`.
// `HeadingAtxSequence` is ignored as the opening and closing sequence,
// but not when intermediate.
TokenType::HeadingAtxSequence | TokenType::HeadingAtxSpaceOrTab => {
if let Some(buf) = atx_heading_buffer {
atx_heading_buffer = Some(
buf.to_string()
+ &encode(&serialize(
codes,
&from_exit_event(events, index),
false,
)),
);
}
// First fence we see.
if None == atx_opening_sequence_size {
let rank = serialize(codes, &from_exit_event(events, index), false).len();
atx_opening_sequence_size = Some(rank);
buf_tail_mut(buffers).push(format!("", rank));
}
}
TokenType::HeadingAtxText => {
let result = resume(buffers);
if let Some(ref buf) = atx_heading_buffer {
if !buf.is_empty() {
buf_tail_mut(buffers).push(encode(buf));
atx_heading_buffer = Some("".to_string());
}
} else {
atx_heading_buffer = Some("".to_string());
}
buf_tail_mut(buffers).push(encode(&result));
}
TokenType::HeadingSetextText => {
heading_setext_buffer = Some(resume(buffers));
slurp_one_line_ending = true;
}
TokenType::HeadingSetextUnderline => {
let text = heading_setext_buffer
.expect("`atx_opening_sequence_size` must be set in headings");
let head = codes_from_span(codes, &from_exit_event(events, index))[0];
let level: usize = if head == Code::Char('-') { 2 } else { 1 };
heading_setext_buffer = None;
buf_tail_mut(buffers).push(format!("{}", level, text, level));
}
TokenType::HtmlFlow | TokenType::HtmlText => {
ignore_encode = false;
}
TokenType::HtmlFlowData | TokenType::HtmlTextData => {
let slice = serialize(codes, &from_exit_event(events, index), false);
// last_was_tag = false;
buf_tail_mut(buffers).push(if ignore_encode { slice } else { encode(&slice) });
}
TokenType::LineEnding => {
// if slurp_all_line_endings {
// // Empty.
// } else
if slurp_one_line_ending {
slurp_one_line_ending = false;
} else {
buf_tail_mut(buffers).push(encode(&serialize(
codes,
&from_exit_event(events, index),
false,
)));
}
}
TokenType::Paragraph => {
buf_tail_mut(buffers).push("".to_string());
}
TokenType::ThematicBreak => {
buf_tail_mut(buffers).push("
".to_string());
}
#[allow(unreachable_patterns)]
_ => {
unreachable!("unhandled `exit` of TokenType {:?}", token_type)
}
},
}
index += 1;
}
assert!(buffers.len() == 1, "expected 1 final buffer");
buffers.get(0).expect("expected 1 final buffer").concat()
}
/// Push a buffer.
fn buffer(buffers: &mut Vec>) {
buffers.push(vec![]);
}
/// Pop a buffer, returning its value.
fn resume(buffers: &mut Vec>) -> String {
let buf = buffers.pop().expect("Cannot resume w/o buffer");
buf.concat()
}
/// Get the last chunk of current buffer.
fn buf_tail_slice(buffers: &mut [Vec]) -> Option<&String> {
let tail = buf_tail(buffers);
tail.last()
}
/// Get the mutable last chunk of current buffer.
fn buf_tail_mut(buffers: &mut [Vec]) -> &mut Vec {
buffers
.last_mut()
.expect("at least one buffer should exist")
}
/// Get the current buffer.
fn buf_tail(buffers: &mut [Vec]) -> &Vec {
buffers.last().expect("at least one buffer should exist")
}
/// Add a line ending.
fn line_ending(buffers: &mut [Vec], default: &LineEnding) {
let tail = buf_tail_mut(buffers);
// lastWasTag = false
tail.push(default.as_str().to_string());
}
/// Add a line ending if needed (as in, there’s no eol/eof already).
fn line_ending_if_needed(buffers: &mut [Vec], default: &LineEnding) {
let slice = buf_tail_slice(buffers);
let last_char = if let Some(x) = slice {
x.chars().last()
} else {
None
};
let mut add = true;
if let Some(x) = last_char {
if x == '\n' || x == '\r' {
add = false;
}
} else {
add = false;
}
if add {
line_ending(buffers, default);
}
}