| /** | |
| * 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; | |