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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
//! The flow content type.
//!
//! **Flow** represents the sections, such as headings and code, which are
//! parsed per line.
//! An example is HTML, which has a certain starting condition (such as
//! `<script>` on its own line), then continues for a while, until an end
//! condition is found (such as `</style>`).
//! If that line with an end condition is never found, that flow goes until
//! the end.
//!
//! The constructs found in flow are:
//!
//! * [Blank line][crate::construct::blank_line]
//! * [Code (fenced)][crate::construct::code_fenced]
//! * [Code (indented)][crate::construct::code_indented]
//! * [Definition][crate::construct::definition]
//! * [Heading (atx)][crate::construct::heading_atx]
//! * [Heading (setext)][crate::construct::heading_setext]
//! * [HTML (flow)][crate::construct::html_flow]
//! * [Thematic break][crate::construct::thematic_break]
use crate::token::Token;
use crate::tokenizer::{State, StateName, Tokenizer};
/// Before flow.
///
/// First we assume a blank line.
//
/// ```markdown
/// |
/// |## alpha
/// | bravo
/// |***
/// ```
pub fn start(tokenizer: &mut Tokenizer) -> State {
match tokenizer.current {
None => State::Ok,
_ => tokenizer.attempt(
StateName::BlankLineStart,
State::Fn(StateName::FlowBlankLineAfter),
State::Fn(StateName::FlowBefore),
),
}
}
/// Before flow (initial).
///
/// “Initial” flow means unprefixed flow, so right at the start of a line.
/// Interestingly, the only flow (initial) construct is indented code.
/// Move to `before` afterwards.
///
/// ```markdown
/// |qwe
/// | asd
/// |~~~js
/// |<div>
/// ```
pub fn before(tokenizer: &mut Tokenizer) -> State {
// match tokenizer.current {
// None => State::Ok,
// _ => {
tokenizer.attempt(
StateName::CodeIndentedStart,
State::Fn(StateName::FlowAfter),
State::Fn(StateName::FlowBeforeCodeFenced),
)
// }
// }
}
pub fn before_code_fenced(tokenizer: &mut Tokenizer) -> State {
tokenizer.attempt(
StateName::CodeFencedStart,
State::Fn(StateName::FlowAfter),
State::Fn(StateName::FlowBeforeHtml),
)
}
pub fn before_html(tokenizer: &mut Tokenizer) -> State {
tokenizer.attempt(
StateName::HtmlFlowStart,
State::Fn(StateName::FlowAfter),
State::Fn(StateName::FlowBeforeHeadingAtx),
)
}
pub fn before_heading_atx(tokenizer: &mut Tokenizer) -> State {
tokenizer.attempt(
StateName::HeadingAtxStart,
State::Fn(StateName::FlowAfter),
State::Fn(StateName::FlowBeforeHeadingSetext),
)
}
pub fn before_heading_setext(tokenizer: &mut Tokenizer) -> State {
tokenizer.attempt(
StateName::HeadingSetextStart,
State::Fn(StateName::FlowAfter),
State::Fn(StateName::FlowBeforeThematicBreak),
)
}
pub fn before_thematic_break(tokenizer: &mut Tokenizer) -> State {
tokenizer.attempt(
StateName::ThematicBreakStart,
State::Fn(StateName::FlowAfter),
State::Fn(StateName::FlowBeforeDefinition),
)
}
pub fn before_definition(tokenizer: &mut Tokenizer) -> State {
tokenizer.attempt(
StateName::DefinitionStart,
State::Fn(StateName::FlowAfter),
State::Fn(StateName::FlowBeforeParagraph),
)
}
/// After a blank line.
///
/// Move to `start` afterwards.
///
/// ```markdown
/// ␠␠|
/// ```
pub fn blank_line_after(tokenizer: &mut Tokenizer) -> State {
match tokenizer.current {
None => State::Ok,
Some(b'\n') => {
tokenizer.enter(Token::BlankLineEnding);
tokenizer.consume();
tokenizer.exit(Token::BlankLineEnding);
// Feel free to interrupt.
tokenizer.interrupt = false;
State::Fn(StateName::FlowStart)
}
_ => unreachable!("expected eol/eof"),
}
}
/// After something.
///
/// ```markdown
/// ## alpha|
/// |
/// ~~~js
/// asd
/// ~~~|
/// ```
pub fn after(tokenizer: &mut Tokenizer) -> State {
match tokenizer.current {
None => State::Ok,
Some(b'\n') => {
tokenizer.enter(Token::LineEnding);
tokenizer.consume();
tokenizer.exit(Token::LineEnding);
State::Fn(StateName::FlowStart)
}
_ => unreachable!("expected eol/eof"),
}
}
/// Before a paragraph.
///
/// ```markdown
/// |asd
/// ```
pub fn before_paragraph(tokenizer: &mut Tokenizer) -> State {
tokenizer.attempt(
StateName::ParagraphStart,
State::Fn(StateName::FlowAfter),
State::Nok,
)
}
|
