ftml 1.41.0

Foundation Text Markup Language - a library to render Wikidot text as HTML
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

/*
 * parsing/rule/impls/block/blocks/lines.rs
 *
 * ftml - Library to parse Wikidot text
 * Copyright (C) 2019-2026 Wikijump Team
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

use super::prelude::*;
use std::num::NonZeroU32;

pub const BLOCK_LINES: BlockRule = BlockRule {
    name: "block-lines",
    accepts_names: &["lines", "newlines"],
    accepts_star: false,
    accepts_score: false,
    accepts_newlines: true,
    parse_fn,
};

fn parse_fn<'r, 't>(
    parser: &mut Parser<'r, 't>,
    name: &'t str,
    flag_star: bool,
    flag_score: bool,
    in_head: bool,
) -> ParseResult<'r, 't, Elements<'t>> {
    debug!("Parsing newlines block (in-head {in_head})");
    assert!(!flag_star, "Lines doesn't allow star flag");
    assert!(!flag_score, "Lines doesn't allow score flag");
    assert_block_name(&BLOCK_LINES, name);

    let count = parser.get_head_value(&BLOCK_LINES, in_head, parse_count)?;
    ok!(Element::LineBreaks(count))
}

fn parse_count<'t>(
    parser: &Parser<'_, 't>,
    argument: Option<&'t str>,
) -> Result<NonZeroU32, ParseError> {
    let argument = match argument {
        Some(arg) => arg.trim(),
        None => return Err(parser.make_err(ParseErrorKind::BlockMissingArguments)),
    };

    match argument.parse::<NonZeroU32>() {
        Ok(value) if value.get() > 100 => {
            warn!("Number of lines ({}) is too great (max 100)", value.get());
            Err(parser.make_err(ParseErrorKind::BlockMalformedArguments))
        }
        Ok(value) => Ok(value),
        Err(error) => {
            warn!("Invalid numeric expression: {error}");
            Err(parser.make_err(ParseErrorKind::BlockMalformedArguments))
        }
    }
}