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
|
use failure::{Error,bail};
use pest::iterators::Pair;
use crate::document_tree::{
Element,HasChildren,ExtraAttributes,
elements as e,
element_categories as c,
extra_attributes as a,
attribute_types as at
};
use crate::parser::{
pest_rst::Rule,
pair_ext_parse::PairExt,
};
use super::{whitespace_normalize_name, inline::convert_inline};
#[derive(PartialEq)]
pub(super) enum TitleKind { Double(char), Single(char) }
pub(super) enum TitleOrSsubel {
Title(e::Title, TitleKind),
Ssubel(c::StructuralSubElement),
}
pub(super) fn convert_ssubel(pair: Pair<Rule>) -> Result<Option<TitleOrSsubel>, Error> {
use self::TitleOrSsubel::*;
Ok(Some(match pair.as_rule() {
Rule::title => { let (t, k) = convert_title(pair)?; Title(t, k) },
Rule::paragraph => Ssubel(convert_paragraph(pair)?.into()),
Rule::target => Ssubel(convert_target(pair)?.into()),
Rule::substitution_def => Ssubel(convert_substitution_def(pair)?.into()),
Rule::admonition_gen => Ssubel(convert_admonition_gen(pair)?.into()),
Rule::image => Ssubel(convert_image::<e::Image>(pair)?.into()),
Rule::EOI => return Ok(None),
rule => panic!("unknown rule {:?}", rule),
}))
}
fn convert_title(pair: Pair<Rule>) -> Result<(e::Title, TitleKind), Error> {
let mut title: Option<Vec<c::TextOrInlineElement>> = None;
let mut adornment_char: Option<char> = None;
// title_double or title_single. Extract kind before consuming
let inner_pair = pair.into_inner().next().unwrap();
let kind = inner_pair.as_rule();
for p in inner_pair.into_inner() {
match p.as_rule() {
Rule::line => title = Some(p.into_inner().map(convert_inline).collect::<Result<_,_>>()?),
Rule::adornments => adornment_char = Some(p.as_str().chars().next().expect("Empty adornment?")),
rule => unimplemented!("Unexpected rule in title: {:?}", rule),
};
}
// now we encountered one line of text and one of adornments
// TODO: emit error if the adornment line is too short (has to match title length)
let elem = e::Title::with_children(title.expect("No text in title"));
let title_kind = match kind {
Rule::title_double => TitleKind::Double(adornment_char.unwrap()),
Rule::title_single => TitleKind::Single(adornment_char.unwrap()),
_ => unreachable!(),
};
Ok((elem, title_kind))
}
fn convert_paragraph(pair: Pair<Rule>) -> Result<e::Paragraph, Error> {
let children = pair.into_inner().map(convert_inline).collect::<Result<_,_>>()?;
Ok(e::Paragraph::with_children(children))
}
fn convert_target(pair: Pair<Rule>) -> Result<e::Target, Error> {
let mut elem: e::Target = Default::default();
elem.extra_mut().anonymous = false;
for p in pair.into_inner() {
match p.as_rule() {
Rule::target_name_uq | Rule::target_name_qu => {
elem.ids_mut().push(p.as_str().into());
elem.names_mut().push(p.as_str().into());
},
// TODO: also handle non-urls
Rule::link_target => elem.extra_mut().refuri = Some(p.parse()?),
rule => panic!("Unexpected rule in target: {:?}", rule),
}
}
Ok(elem)
}
fn convert_substitution_def(pair: Pair<Rule>) -> Result<e::SubstitutionDefinition, Error> {
let mut pairs = pair.into_inner();
let name = whitespace_normalize_name(pairs.next().unwrap().as_str()); // Rule::substitution_name
let inner_pair = pairs.next().unwrap();
let inner: Vec<c::TextOrInlineElement> = match inner_pair.as_rule() {
Rule::replace => convert_replace(inner_pair)?,
Rule::image => vec![convert_image::<e::ImageInline>(inner_pair)?.into()],
rule => panic!("Unknown substitution rule {:?}", rule),
};
let mut subst_def = e::SubstitutionDefinition::with_children(inner);
subst_def.names_mut().push(at::NameToken(name));
Ok(subst_def)
}
fn convert_replace(pair: Pair<Rule>) -> Result<Vec<c::TextOrInlineElement>, Error> {
let mut pairs = pair.into_inner();
let line = pairs.next().unwrap();
line.into_inner().map(convert_inline).collect()
}
fn convert_image<I>(pair: Pair<Rule>) -> Result<I, Error> where I: Element + ExtraAttributes<a::Image> {
let mut pairs = pair.into_inner();
let mut image = I::with_extra(a::Image::new(
pairs.next().unwrap().parse()?, // line
));
if let Some(opt_block) = pairs.next() { // image_opt_block
let options = opt_block.into_inner();
for opt in options {
let mut opt_iter = opt.into_inner();
let opt_name = opt_iter.next().unwrap();
let opt_val = opt_iter.next().unwrap();
match opt_name.as_str() {
"class" => image.classes_mut().push(opt_val.as_str().to_owned()),
"name" => image.names_mut().push(opt_val.as_str().into()),
"alt" => image.extra_mut().alt = Some(opt_val.as_str().to_owned()),
"height" => image.extra_mut().height = Some(opt_val.parse()?),
"width" => image.extra_mut().width = Some(opt_val.parse()?),
"scale" => image.extra_mut().scale = Some(parse_scale(&opt_val)?),
"align" => image.extra_mut().align = Some(opt_val.parse()?),
"target" => image.extra_mut().target = Some(opt_val.parse()?),
name => bail!("Unknown Image option {}", name),
}
}
}
Ok(image)
}
fn parse_scale(pair: &Pair<Rule>) -> Result<u8, Error> {
let input = if pair.as_str().chars().rev().next() == Some('%') { &pair.as_str()[..pair.as_str().len()-1] } else { pair.as_str() };
use pest::error::{Error,ErrorVariant};
Ok(input.parse().map_err(|e: std::num::ParseIntError| {
let var: ErrorVariant<Rule> = ErrorVariant::CustomError { message: e.to_string() };
Error::new_from_span(var, pair.as_span())
})?)
}
fn convert_admonition_gen(pair: Pair<Rule>) -> Result<c::BodyElement, Error> {
let mut iter = pair.into_inner();
let typ = iter.next().unwrap().as_str();
// TODO: in reality it contains body elements.
let children: Vec<c::BodyElement> = iter.map(|p| e::Paragraph::with_children(vec![p.as_str().into()]).into()).collect();
Ok(match typ {
"attention" => e::Attention::with_children(children).into(),
"hint" => e::Hint::with_children(children).into(),
"note" => e::Note::with_children(children).into(),
"caution" => e::Caution::with_children(children).into(),
"danger" => e::Danger::with_children(children).into(),
"error" => e::Error::with_children(children).into(),
"important" => e::Important::with_children(children).into(),
"tip" => e::Tip::with_children(children).into(),
"warning" => e::Warning::with_children(children).into(),
typ => panic!("Unknown admontion type {}!", typ),
})
}
|
