elm_parser/
helpers.rs

1use crate::{
2    emitter::{Emitter, TagInfo},
3    parser::ParserError,
4};
5
6pub fn concat_ignore_spaces(start: &str, content: &str, end: &str) -> String {
7    let trimmed_content = content.trim_start(); // Remove leading spaces from content
8    format!("{}{}{}", start, trimmed_content, end)
9}
10
11pub fn get_tag_from_string(string: &str) -> String {
12    let mut i = 3;
13    let mut tag = "".to_string();
14    while i < string.len()
15        && string.chars().nth(i).unwrap() != ' '
16        && string.chars().nth(i).unwrap() != '>'
17    {
18        tag.push(string.chars().nth(i).unwrap());
19        i += 1
20    }
21    tag
22}
23
24pub fn tag_loop(tag_stack: &mut Vec<TagInfo>, output: &mut String, indent: &usize) {
25    while let Some(last_tag_info) = tag_stack.last() {
26        if *indent <= last_tag_info.indent {
27            if last_tag_info.is_self_closing {
28                output.push_str("/>\n");
29            } else {
30                output.push_str(&format!("</{}>\n", last_tag_info.name));
31            }
32            tag_stack.pop();
33        } else {
34            break;
35        }
36    }
37}
38
39pub fn get_line_indent(line: &str) -> usize {
40    if line.is_empty() || line.chars().all(char::is_whitespace) {
41        return 0;
42    };
43    line.len() - line.trim_start().len()
44}
45
46pub fn check_indent_size(size: isize, line: usize) -> Result<(), ParserError> {
47    if size % 4 != 0 {
48        // panic!(
49        //     "Syntax error: \\n
50        //     There must be 4*x spaces before line {}",
51        //     line
52        // )
53        return Err(ParserError::None4xSpacesError(line));
54    }
55    Ok(())
56}
57
58pub fn check_extra_spaces(
59    indent: usize,
60    parent_indent: usize,
61    line: usize,
62) -> Result<(), ParserError> {
63    if indent > parent_indent + 4 {
64        // panic!(
65        //     "Syntax error: \\n
66        //     There are extra spaces at line {}",
67        //     line
68        // )
69        return Err(ParserError::ExtraSpacesError(line));
70    }
71    Ok(())
72}
73
74pub fn get_slice(text: &str, start: usize, end: usize) -> Option<&str> {
75    assert!(end >= start);
76
77    let mut iter = text
78        .char_indices()
79        .map(|(pos, _)| pos)
80        .chain(Some(text.len()))
81        .skip(start)
82        .peekable();
83    let start_pos = *iter.peek()?;
84    for _ in start..end {
85        iter.next();
86    }
87
88    Some(&text[start_pos..*iter.peek()?])
89}
90
91//pub fn track_emitter_line_diff(parser: &mut Emitter, tag_name: &String) {
92//    if tag_name == "Exercises" {
93//        parser.track_line_delta += 1
94//    }
95//
96//if tag_name         == "Example" {
97//        parser.track_line_delta += 1
98//    }
99//
100//    if tag_name == "Exercise" {
101//        parser.track_line_delta += 3
102//    }
103//
104//    if tag_name == "Solution" {
105//        parser.track_line_delta += 1
106//    }
107//}
elm_parser/helpers.rs

elm_parser/
helpers.rs
