tex-fmt 0.4.4

LaTeX formatter written in Rust
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

//! Utilities for performing text substitutions

use crate::comments::*;
use crate::format::*;
use crate::logging::*;
use crate::regexes::*;
use crate::Cli;
use crate::LINE_END;
use log::Level::Trace;

/// Remove multiple line breaks
pub fn remove_extra_newlines(text: &str) -> String {
    let double_line_end = format!("{LINE_END}{LINE_END}");
    RE_NEWLINES.replace_all(text, double_line_end).to_string()
}

/// Replace tabs with spaces
pub fn remove_tabs(text: &str, args: &Cli) -> String {
    let replace = (0..args.tab).map(|_| " ").collect::<String>();
    text.replace('\t', &replace)
}

/// Remove trailing spaces from line endings
pub fn remove_trailing_spaces(text: &str) -> String {
    RE_TRAIL.replace_all(text, LINE_END).to_string()
}

/// Check if environment should be split onto a new line
pub fn needs_env_new_line(line: &str, state: &State) -> bool {
    !state.verbatim.visual
        && !state.ignore.visual
        && (line.contains(ENV_BEGIN)
            || line.contains(ENV_END)
            || line.contains(ITEM))
        && (RE_ENV_BEGIN_SHARED_LINE.is_match(line)
            || RE_ENV_END_SHARED_LINE.is_match(line)
            || RE_ITEM_SHARED_LINE.is_match(line))
}

/// Ensure LaTeX environments begin on new lines
pub fn put_env_new_line(
    line: &str,
    state: &State,
    file: &str,
    args: &Cli,
    logs: &mut Vec<Log>,
) -> Option<(String, String)> {
    if args.trace {
        record_line_log(
            logs,
            Trace,
            file,
            state.linum_new,
            state.linum_old,
            line,
            "Placing environment on new line.",
        );
    }
    let comment_index = find_comment_index(line);
    let comment = &get_comment(line, comment_index);
    let mut text = &remove_comment(line, comment_index);
    let mut temp = RE_ENV_BEGIN_SHARED_LINE
        .replace(text, format!("$prev{LINE_END}$env"))
        .to_string();
    text = &temp;
    if !text.contains(LINE_END) {
        temp = RE_ENV_END_SHARED_LINE
            .replace(text, format!("$prev{LINE_END}$env"))
            .to_string();
        text = &temp;
    }
    if !text.contains(LINE_END) {
        temp = RE_ITEM_SHARED_LINE
            .replace(text, format!("$prev{LINE_END}$env"))
            .to_string();
        text = &temp;
    }
    if text.contains(LINE_END) {
        let split = text.split_once(LINE_END).unwrap();
        let split_0 = split.0.to_string();
        let mut split_1 = split.1.to_string();
        split_1.push_str(comment);
        return Some((split_0, split_1));
    }
    None
}