| 1 |
|
| 2 |
pub fn strip_code_spans(input: &str) -> String { |
| 3 |
let mut out = String::with_capacity(input.len()); |
| 4 |
let mut chars = input.chars().peekable(); |
| 5 |
|
| 6 |
while let Some(ch) = chars.next() { |
| 7 |
if ch == '`' { |
| 8 |
let mut tick_count = 1; |
| 9 |
while chars.peek() == Some(&'`') { |
| 10 |
tick_count += 1; |
| 11 |
chars.next(); |
| 12 |
} |
| 13 |
let mut skipped = 0; |
| 14 |
while let Some(c) = chars.next() { |
| 15 |
skipped += 1; |
| 16 |
if c == '`' { |
| 17 |
let mut close_count = 1; |
| 18 |
while chars.peek() == Some(&'`') { |
| 19 |
close_count += 1; |
| 20 |
chars.next(); |
| 21 |
} |
| 22 |
if close_count == tick_count { |
| 23 |
break; |
| 24 |
} |
| 25 |
} |
| 26 |
} |
| 27 |
let total = tick_count * 2 + skipped; |
| 28 |
for _ in 0..total { |
| 29 |
out.push(' '); |
| 30 |
} |
| 31 |
} else { |
| 32 |
out.push(ch); |
| 33 |
} |
| 34 |
} |
| 35 |
out |
| 36 |
} |
| 37 |
|
| 38 |
|
| 39 |
pub fn code_span_ranges(input: &str) -> Vec<(usize, usize)> { |
| 40 |
let mut ranges = Vec::new(); |
| 41 |
let bytes = input.as_bytes(); |
| 42 |
let len = bytes.len(); |
| 43 |
let mut i = 0; |
| 44 |
|
| 45 |
while i < len { |
| 46 |
if bytes[i] == b'`' { |
| 47 |
let start = i; |
| 48 |
let mut tick_count = 0; |
| 49 |
while i < len && bytes[i] == b'`' { |
| 50 |
tick_count += 1; |
| 51 |
i += 1; |
| 52 |
} |
| 53 |
let mut found = false; |
| 54 |
while i < len { |
| 55 |
if bytes[i] == b'`' { |
| 56 |
let mut close_count = 0; |
| 57 |
while i < len && bytes[i] == b'`' { |
| 58 |
close_count += 1; |
| 59 |
i += 1; |
| 60 |
} |
| 61 |
if close_count == tick_count { |
| 62 |
ranges.push((start, i)); |
| 63 |
found = true; |
| 64 |
break; |
| 65 |
} |
| 66 |
} else { |
| 67 |
i += 1; |
| 68 |
} |
| 69 |
} |
| 70 |
if !found { |
| 71 |
ranges.push((start, len)); |
| 72 |
} |
| 73 |
} else { |
| 74 |
i += 1; |
| 75 |
} |
| 76 |
} |
| 77 |
ranges |
| 78 |
} |
| 79 |
|
| 80 |
#[cfg(test)] |
| 81 |
mod tests { |
| 82 |
use super::*; |
| 83 |
|
| 84 |
#[test] |
| 85 |
fn strip_inline_code() { |
| 86 |
let result = strip_code_spans("hello `code` world"); |
| 87 |
assert!(!result.contains("code")); |
| 88 |
assert!(result.contains("hello")); |
| 89 |
assert!(result.contains("world")); |
| 90 |
} |
| 91 |
|
| 92 |
#[test] |
| 93 |
fn strip_fenced_code() { |
| 94 |
let result = strip_code_spans("text\n```\ncode block\n```\nmore"); |
| 95 |
assert!(!result.contains("code block")); |
| 96 |
assert!(result.contains("text")); |
| 97 |
assert!(result.contains("more")); |
| 98 |
} |
| 99 |
|
| 100 |
#[test] |
| 101 |
fn ranges_inline_code() { |
| 102 |
let input = "hello `code` world"; |
| 103 |
let ranges = code_span_ranges(input); |
| 104 |
assert_eq!(ranges.len(), 1); |
| 105 |
let (start, end) = ranges[0]; |
| 106 |
assert_eq!(&input[start..end], "`code`"); |
| 107 |
} |
| 108 |
|
| 109 |
#[test] |
| 110 |
fn ranges_fenced_code() { |
| 111 |
let input = "text\n```\ncode\n```\nmore"; |
| 112 |
let ranges = code_span_ranges(input); |
| 113 |
assert_eq!(ranges.len(), 1); |
| 114 |
let (start, end) = ranges[0]; |
| 115 |
assert!(input[start..end].starts_with("```")); |
| 116 |
assert!(input[start..end].ends_with("```")); |
| 117 |
} |
| 118 |
|
| 119 |
#[test] |
| 120 |
fn ranges_unclosed_backtick() { |
| 121 |
let input = "hello `unclosed"; |
| 122 |
let ranges = code_span_ranges(input); |
| 123 |
assert_eq!(ranges.len(), 1); |
| 124 |
assert_eq!(ranges[0], (6, input.len())); |
| 125 |
} |
| 126 |
|
| 127 |
#[test] |
| 128 |
fn no_code_spans() { |
| 129 |
assert!(code_span_ranges("no code here").is_empty()); |
| 130 |
assert_eq!(strip_code_spans("no code here"), "no code here"); |
| 131 |
} |
| 132 |
} |
| 133 |
|