markdown_that/plugins/cmark/block/
paragraph.rs

1//! Paragraph
2//!
3//! This is the default rule if nothing else matches.
4//!
5//! <https://spec.commonmark.org/0.30/#paragraph>
6use crate::parser::block::{BlockRule, BlockState};
7use crate::parser::inline::InlineRoot;
8use crate::{MarkdownThat, Node, NodeValue, Renderer};
9
10pub fn add(md: &mut MarkdownThat) {
11    md.block.add_rule::<ParagraphScanner>().after_all();
12}
13
14#[derive(Debug)]
15pub struct Paragraph;
16
17impl NodeValue for Paragraph {
18    fn render(&self, node: &Node, fmt: &mut dyn Renderer) {
19        fmt.cr();
20        fmt.open("p", &node.attrs);
21        fmt.contents(&node.children);
22        fmt.close("p");
23        fmt.cr();
24    }
25}
26
27#[doc(hidden)]
28pub struct ParagraphScanner;
29impl BlockRule for ParagraphScanner {
30    fn check(_: &mut BlockState) -> Option<()> {
31        None // can't interrupt anything
32    }
33
34    fn run(state: &mut BlockState) -> Option<(Node, usize)> {
35        let start_line = state.line;
36        let mut next_line = start_line;
37
38        // jump line-by-line until empty one or EOF
39        'outer: loop {
40            next_line += 1;
41
42            if next_line >= state.line_max || state.is_empty(next_line) {
43                break;
44            }
45
46            // this may be a code block normally, but after paragraph
47            // it's considered a lazy continuation regardless of what's there
48            if state.line_indent(next_line) >= state.md.max_indent {
49                continue;
50            }
51
52            // quirk for blockquotes, this line should already be checked by that rule
53            if state.line_offsets[next_line].indent_nonspace < 0 {
54                continue;
55            }
56
57            // Some tags can terminate paragraph without empty line.
58            let old_state_line = state.line;
59            state.line = next_line;
60            if state.test_rules_at_line() {
61                state.line = old_state_line;
62                break 'outer;
63            }
64            state.line = old_state_line;
65        }
66
67        let (content, mapping) = state.get_lines(start_line, next_line, state.blk_indent, false);
68
69        let mut node = Node::new(Paragraph);
70        node.children
71            .push(Node::new(InlineRoot::new(content, mapping)));
72        Some((node, next_line - start_line))
73    }
74}
markdown_that/plugins/cmark/block/paragraph.rs

markdown_that/plugins/cmark/block/
paragraph.rs
