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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
//! Space or tab occurs in tons of places.
//!
//! ## Grammar
//!
//! Space or tab forms with the following BNF
//! (<small>see [construct][crate::construct] for character groups</small>):
//!
//! ```bnf
//! space_or_tab ::= 1*('\t' | ' ')
//! ```
//!
//! ## References
//!
//! * [`micromark-factory-space/index.js` in `micromark`](https://github.com/micromark/micromark/blob/main/packages/micromark-factory-space/dev/index.js)
use crate::event::{Content, Link, Name};
use crate::state::{Name as StateName, State};
use crate::subtokenize::link;
use crate::tokenizer::Tokenizer;
/// Configuration.
#[derive(Debug)]
pub struct Options {
/// Minimum allowed bytes (inclusive).
pub min: usize,
/// Maximum allowed bytes (inclusive).
pub max: usize,
/// Name to use for events.
pub kind: Name,
/// Connect this event to the previous.
pub connect: bool,
/// Embedded content type to use.
pub content: Option<Content>,
}
/// One or more `space_or_tab`.
///
/// ```bnf
/// space_or_tab ::= 1*( ' ' '\t' )
/// ```
pub fn space_or_tab(tokenizer: &mut Tokenizer) -> StateName {
space_or_tab_min_max(tokenizer, 1, usize::MAX)
}
/// Between `x` and `y` `space_or_tab`.
///
/// ```bnf
/// space_or_tab_min_max ::= x*y( ' ' '\t' )
/// ```
pub fn space_or_tab_min_max(tokenizer: &mut Tokenizer, min: usize, max: usize) -> StateName {
space_or_tab_with_options(
tokenizer,
Options {
kind: Name::SpaceOrTab,
min,
max,
content: None,
connect: false,
},
)
}
/// `space_or_tab`, with the given options.
pub fn space_or_tab_with_options(tokenizer: &mut Tokenizer, options: Options) -> StateName {
tokenizer.tokenize_state.space_or_tab_connect = options.connect;
tokenizer.tokenize_state.space_or_tab_content = options.content;
tokenizer.tokenize_state.space_or_tab_min = options.min;
tokenizer.tokenize_state.space_or_tab_max = options.max;
tokenizer.tokenize_state.space_or_tab_token = options.kind;
StateName::SpaceOrTabStart
}
/// Start of `space_or_tab`.
///
/// ```markdown
/// > | a␠␠b
/// ^
/// ```
pub fn start(tokenizer: &mut Tokenizer) -> State {
if tokenizer.tokenize_state.space_or_tab_max > 0
&& matches!(tokenizer.current, Some(b'\t' | b' '))
{
if let Some(ref content) = tokenizer.tokenize_state.space_or_tab_content {
tokenizer.enter_link(
tokenizer.tokenize_state.space_or_tab_token.clone(),
Link {
previous: None,
next: None,
content: content.clone(),
},
);
} else {
tokenizer.enter(tokenizer.tokenize_state.space_or_tab_token.clone());
}
if tokenizer.tokenize_state.space_or_tab_connect {
let index = tokenizer.events.len() - 1;
link(&mut tokenizer.events, index);
} else if tokenizer.tokenize_state.space_or_tab_content.is_some() {
tokenizer.tokenize_state.space_or_tab_connect = true;
}
State::Retry(StateName::SpaceOrTabInside)
} else {
State::Retry(StateName::SpaceOrTabAfter)
}
}
/// In `space_or_tab`.
///
/// ```markdown
/// > | a␠␠b
/// ^
/// ```
pub fn inside(tokenizer: &mut Tokenizer) -> State {
match tokenizer.current {
Some(b'\t' | b' ')
if tokenizer.tokenize_state.space_or_tab_size
< tokenizer.tokenize_state.space_or_tab_max =>
{
tokenizer.consume();
tokenizer.tokenize_state.space_or_tab_size += 1;
State::Next(StateName::SpaceOrTabInside)
}
_ => {
tokenizer.exit(tokenizer.tokenize_state.space_or_tab_token.clone());
State::Retry(StateName::SpaceOrTabAfter)
}
}
}
/// After `space_or_tab`.
///
/// ```markdown
/// > | a␠␠b
/// ^
/// ```
pub fn after(tokenizer: &mut Tokenizer) -> State {
let state = if tokenizer.tokenize_state.space_or_tab_size
>= tokenizer.tokenize_state.space_or_tab_min
{
State::Ok
} else {
State::Nok
};
tokenizer.tokenize_state.space_or_tab_connect = false;
tokenizer.tokenize_state.space_or_tab_content = None;
tokenizer.tokenize_state.space_or_tab_size = 0;
tokenizer.tokenize_state.space_or_tab_max = 0;
tokenizer.tokenize_state.space_or_tab_min = 0;
tokenizer.tokenize_state.space_or_tab_token = Name::SpaceOrTab;
state
}
|
