markdown_it/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::{MarkdownIt, Node, NodeValue, Renderer};
9
10pub fn add(md: &mut MarkdownIt) {
11    md.block.add_rule::<ParagraphScanner>()
12        .after_all();
13}
14
15#[derive(Debug)]
16pub struct Paragraph;
17
18impl NodeValue for Paragraph {
19    fn render(&self, node: &Node, fmt: &mut dyn Renderer) {
20        fmt.cr();
21        fmt.open("p", &node.attrs);
22        fmt.contents(&node.children);
23        fmt.close("p");
24        fmt.cr();
25    }
26}
27
28#[doc(hidden)]
29pub struct ParagraphScanner;
30impl BlockRule for ParagraphScanner {
31    fn check(_: &mut BlockState) -> Option<()> {
32        None // can't interrupt anything
33    }
34
35    fn run(state: &mut BlockState) -> Option<(Node, usize)> {
36        let start_line = state.line;
37        let mut next_line = start_line;
38
39        // jump line-by-line until empty one or EOF
40        'outer: loop {
41            next_line += 1;
42
43            if next_line >= state.line_max || state.is_empty(next_line) { break; }
44
45            // this may be a code block normally, but after paragraph
46            // it's considered a lazy continuation regardless of what's there
47            if state.line_indent(next_line) >= state.md.max_indent { continue; }
48
49            // quirk for blockquotes, this line should already be checked by that rule
50            if state.line_offsets[next_line].indent_nonspace < 0 { continue; }
51
52            // Some tags can terminate paragraph without empty line.
53            let old_state_line = state.line;
54            state.line = next_line;
55            if state.test_rules_at_line() {
56                state.line = old_state_line;
57                break 'outer;
58            }
59            state.line = old_state_line;
60        }
61
62        let (content, mapping) = state.get_lines(start_line, next_line, state.blk_indent, false);
63
64        let mut node = Node::new(Paragraph);
65        node.children.push(Node::new(InlineRoot::new(content, mapping)));
66        Some((node, next_line - start_line))
67    }
68}
markdown_it/plugins/cmark/block/paragraph.rs

markdown_it/plugins/cmark/block/
paragraph.rs
