1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
//! Block quotes occur in the [document][] content type.
//!
//! ## Grammar
//!
//! Block quotes form with the following BNF
//! (<small>see [construct][crate::construct] for character groups</small>):
//!
//! ```bnf
//! block_quote_start ::= '>' [ space_or_tab ]
//! block_quote_cont ::= '>' [ space_or_tab ]
//! ```
//!
//! Further lines that are not prefixed with `block_quote_cont` cause the block
//! quote to be exited, except when those lines are lazy continuation.
//! Like so many things in markdown, block quotes too, are complex.
//! See [*§ Phase 1: block structure* in `CommonMark`][commonmark-block] for
//! more on parsing details.
//!
//! As block quote is a container, it takes several bytes from the start of the
//! line, while the rest of the line includes more containers or flow.
//!
//! ## HTML
//!
//! Block quote relates to the `<blockquote>` element in HTML.
//! See [*§ 4.4.4 The `blockquote` element*][html-blockquote] in the HTML spec
//! for more info.
//!
//! ## Recommendation
//!
//! Always use a single space after a block quote marker (`>`).
//! Never use lazy continuation.
//!
//! ## Tokens
//!
//! * [`BlockQuote`][Name::BlockQuote]
//! * [`BlockQuoteMarker`][Name::BlockQuoteMarker]
//! * [`BlockQuotePrefix`][Name::BlockQuotePrefix]
//! * [`SpaceOrTab`][Name::SpaceOrTab]
//!
//! ## References
//!
//! * [`block-quote.js` in `micromark`](https://github.com/micromark/micromark/blob/main/packages/micromark-core-commonmark/dev/lib/block-quote.js)
//! * [*§ 5.1 Block quotes* in `CommonMark`](https://spec.commonmark.org/0.30/#block-quotes)
//!
//! [document]: crate::construct::document
//! [html-blockquote]: https://html.spec.whatwg.org/multipage/grouping-content.html#the-blockquote-element
//! [commonmark-block]: https://spec.commonmark.org/0.30/#phase-1-block-structure
use crate::constant::TAB_SIZE;
use crate::construct::partial_space_or_tab::space_or_tab_min_max;
use crate::event::Name;
use crate::state::{Name as StateName, State};
use crate::tokenizer::Tokenizer;
/// Start of block quote.
///
/// ```markdown
/// > | > a
/// ^
/// ```
pub fn start(tokenizer: &mut Tokenizer) -> State {
if tokenizer.parse_state.constructs.block_quote {
tokenizer.enter(Name::BlockQuote);
State::Retry(StateName::BlockQuoteContStart)
} else {
State::Nok
}
}
/// Start of block quote continuation.
///
/// Also used to parse the first block quote opening.
///
/// ```markdown
/// | > a
/// > | > b
/// ^
/// ```
pub fn cont_start(tokenizer: &mut Tokenizer) -> State {
if matches!(tokenizer.current, Some(b'\t' | b' ')) {
tokenizer.attempt(State::Next(StateName::BlockQuoteContBefore), State::Nok);
State::Retry(space_or_tab_min_max(
tokenizer,
1,
if tokenizer.parse_state.constructs.code_indented {
TAB_SIZE - 1
} else {
usize::MAX
},
))
} else {
State::Retry(StateName::BlockQuoteContBefore)
}
}
/// At `>`, after optional whitespace.
///
/// Also used to parse the first block quote opening.
///
/// ```markdown
/// | > a
/// > | > b
/// ^
/// ```
pub fn cont_before(tokenizer: &mut Tokenizer) -> State {
match tokenizer.current {
Some(b'>') => {
tokenizer.enter(Name::BlockQuotePrefix);
tokenizer.enter(Name::BlockQuoteMarker);
tokenizer.consume();
tokenizer.exit(Name::BlockQuoteMarker);
State::Next(StateName::BlockQuoteContAfter)
}
_ => State::Nok,
}
}
/// After `>`, before optional whitespace.
///
/// ```markdown
/// > | > a
/// ^
/// > | >b
/// ^
/// ```
pub fn cont_after(tokenizer: &mut Tokenizer) -> State {
if let Some(b'\t' | b' ') = tokenizer.current {
tokenizer.enter(Name::SpaceOrTab);
tokenizer.consume();
tokenizer.exit(Name::SpaceOrTab);
}
tokenizer.exit(Name::BlockQuotePrefix);
State::Ok
}
|
