cdoc 0.5.1

A markdown-based document parser and processor
Documentation 
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

use crate::ast::{AstVisitor, CodeAttributes, Inline, Shortcode};
use crate::document::split_shortcodes;
use crate::notebook::CellOutput;
use crate::parsers::shortcodes::{parse_shortcode, ShortCodeDef};
use regex::Regex;
use std::collections::HashMap;
use std::str::FromStr;

pub struct MathInserter {
    math_blocks: Vec<Inline>,
}

impl MathInserter {
    pub fn new(math_blocks: Vec<Inline>) -> Self {
        MathInserter { math_blocks }
    }
}

impl AstVisitor for MathInserter {
    fn visit_inline(&mut self, inline: &mut Inline) -> anyhow::Result<()> {
        if let Inline::Strong(inner) = inline {
            let s: String = inner.iter_mut().map(|i| i.to_string()).collect();

            if let Ok(idx) = usize::from_str(&s) {
                *inline = self.math_blocks[idx].clone()
            }
        }

        self.walk_inline(inline)
    }
}

pub struct ShortcodeInserter<'a> {
    shortcodes: Vec<(&'a str, &'a str)>,
    counters: &'a mut HashMap<String, (usize, Vec<ShortCodeDef>)>,
}

impl<'a> ShortcodeInserter<'a> {
    pub fn new(
        shortcodes: Vec<(&'a str, &'a str)>,
        counters: &'a mut HashMap<String, (usize, Vec<ShortCodeDef>)>,
    ) -> Self {
        ShortcodeInserter {
            shortcodes,
            counters,
        }
    }
}

impl AstVisitor for ShortcodeInserter<'_> {
    fn visit_inline(&mut self, inline: &mut Inline) -> anyhow::Result<()> {
        if let Inline::Emphasis(inner) = inline {
            let s: String = inner.iter_mut().map(|i| i.to_string()).collect();

            if let Ok(idx) = usize::from_str(&s) {
                let (def, body) = self.shortcodes[idx];
                let code = parse_shortcode(def)?;

                self.counters
                    .get_mut(&code.name)
                    .map(|v| {
                        v.0 += 1;
                        v.1.push(code.clone());
                    })
                    .unwrap_or_else(|| {
                        self.counters
                            .insert(code.name.clone(), (1, vec![code.clone()]));
                    });

                let base = code.into_base(self.counters)?;
                let code = if body.is_empty() {
                    Shortcode::Inline(base)
                } else {
                    let body_blocks = split_shortcodes(body, self.counters)?;
                    Shortcode::Block(base, body_blocks)
                };
                *inline = Inline::Shortcode(code);
            }
        }

        self.walk_inline(inline)
    }

    fn visit_code_block(
        &mut self,
        source: &mut String,
        _reference: &mut Option<String>,
        _attr: &mut CodeAttributes,
        _tags: &mut Option<Vec<String>>,
        _outputs: &mut Vec<CellOutput>,
    ) -> anyhow::Result<()> {
        self.replace_with_original(source)
    }

    fn visit_code(&mut self, source: &mut String) -> anyhow::Result<()> {
        self.replace_with_original(source)
    }
}

impl ShortcodeInserter<'_> {
    fn replace_with_original(&mut self, source: &mut String) -> anyhow::Result<()> {
        let r = Regex::new(r"_([0-9]+)_")?;

        let mut out = String::new();
        let mut start_idx = 0;

        r.captures_iter(source).try_for_each(|m| {
            if let Some(ms) = m.get(1) {
                let idx = usize::from_str(ms.as_str())?;
                out.push_str(&source[start_idx..ms.range().start - 1]);

                let (def, body) = self.shortcodes[idx];

                if body.is_empty() {
                    out.push_str(&format!("{{{{ {} }}}}", def));
                } else {
                    out.push_str(&format!("{{% {} %}}", def));
                    let code = parse_shortcode(def)?;
                    out.push_str(body);
                    out.push_str(&format!("{{% end_{} %}}", code.name))
                }
                start_idx = ms.range().end + 1;
            }

            Ok::<(), anyhow::Error>(())
        })?;
        out.push_str(&source[start_idx..]);
        *source = out;
        Ok(())
    }
}