crashkeys.dev
Markdown parser fork with extended syntax for personal use.
1//! Resolve events.
2
3use crate::construct;
4use crate::message;
5use crate::subtokenize::Subresult;
6use crate::tokenizer::Tokenizer;
7
8/// Names of resolvers.
9#[derive(Clone, Copy, Debug, Eq, PartialEq)]
10pub enum Name {
11 /// Resolve labels.
12 ///
13 /// Labels are parsed as starts and ends, and when they match, merged
14 /// together to form media (links and images), and otherwise turned into
15 /// data.
16 Label,
17 /// Resolve attention.
18 ///
19 /// Attention sequences are parsed and finally matched together to form
20 /// attention (emphasis and strong) based on which characters they contain,
21 /// and what occurs before and after each sequence.
22 /// Otherwise they are turned into data.
23 Attention,
24 /// Resolve GFM tables.
25 ///
26 /// The table head, and later each row, are all parsed separately.
27 /// Resolving groups everything together, and groups cells.
28 GfmTable,
29 /// Resolve heading (atx).
30 ///
31 /// Heading (atx) contains further sequences and data.
32 /// At the end, a final sequence is kept that way, while the rest is merged
33 /// with the data.
34 HeadingAtx,
35 /// Resolve heading (setext).
36 ///
37 /// Heading (setext) is parsed as an underline that is preceded by content,
38 /// both will form the whole construct.
39 HeadingSetext,
40 /// Resolve list item.
41 ///
42 /// List items are parsed on their own.
43 /// They are wrapped into ordered or unordered lists based on whether items
44 /// with the same marker occur next to each other.
45 ListItem,
46 /// Resolve content.
47 ///
48 /// Content is parsed as single lines, as what remains if other flow
49 /// constructs don’t match.
50 /// But, when they occur next to each other, they need to be merged.
51 Content,
52 /// Resolve data.
53 ///
54 /// Data is parsed as many small bits, due to many punctuation characters
55 /// potentially starting something in particularly text content.
56 /// It helps performance to merge them together if those markers did not
57 /// match anything and hence they occur next to each other.
58 Data,
59 /// Resolve whitespace in `string`.
60 String,
61 /// Resolve whitespace in `text`.
62 Text,
63}
64
65/// Call the corresponding resolver.
66pub fn call(tokenizer: &mut Tokenizer, name: Name) -> Result<Option<Subresult>, message::Message> {
67 let result = match name {
68 Name::Label => construct::label_end::resolve(tokenizer),
69 Name::Attention => construct::attention::resolve(tokenizer),
70 Name::GfmTable => construct::gfm_table::resolve(tokenizer),
71 Name::HeadingAtx => construct::heading_atx::resolve(tokenizer),
72 Name::HeadingSetext => construct::heading_setext::resolve(tokenizer),
73 Name::ListItem => construct::list_item::resolve(tokenizer),
74 Name::Content => construct::content::resolve(tokenizer)?,
75 Name::Data => construct::partial_data::resolve(tokenizer),
76 Name::String => construct::string::resolve(tokenizer),
77 Name::Text => construct::text::resolve(tokenizer),
78 };
79
80 Ok(result)
81}