File size: 1,438 Bytes
2517be1 | 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 | /**
* Matches common Markdown code blocks to exclude them from further processing (e.g. LaTeX).
* - Fenced: ```...```
* - Inline: `...` (does NOT support nested backticks or multi-backtick syntax)
*
* Note: This pattern does not handle advanced cases like:
* `` `code with `backticks` `` or \\``...\\``
*/
export const CODE_BLOCK_REGEXP = /(```[\s\S]*?```|`[^`\n]+`)/g;
/**
* Matches LaTeX math delimiters \(...\) and \[...\] only when not preceded by a backslash (i.e., not escaped),
* while also capturing code blocks (```, `...`) so they can be skipped during processing.
*
* Uses negative lookbehind `(?<!\\)` to avoid matching \\( or \\[.
* Using the look‑behind pattern `(?<!\\)` we skip matches
* that are preceded by a backslash, e.g.
* `Definitions\\(also called macros)` (title of chapter 20 in The TeXbook)
* or `\\[4pt]` (LaTeX line-break).
*
* group 1: code-block
* group 2: square-bracket
* group 3: round-bracket
*/
export const LATEX_MATH_AND_CODE_PATTERN =
/(```[\S\s]*?```|`.*?`)|(?<!\\)\\\[([\S\s]*?[^\\])\\]|(?<!\\)\\\((.*?)\\\)/g;
/** Regex to capture the content of a $$...\\\\...$$ block (display-formula with line-break) */
export const LATEX_LINEBREAK_REGEXP = /\$\$([\s\S]*?\\\\[\s\S]*?)\$\$/;
/** map from mchem-regexp to replacement */
export const MHCHEM_PATTERN_MAP: readonly [RegExp, string][] = [
[/(\s)\$\\ce{/g, '$1$\\\\ce{'],
[/(\s)\$\\pu{/g, '$1$\\\\pu{']
] as const;
|