( textarea: HTMLTextAreaElement, selectionStart: number, selectionEnd: number, )
| 16 | * Returns true if the selection is inside a pattern like [text](url) or [](url) |
| 17 | */ |
| 18 | export const isSelectionInMarkdownLink = ( |
| 19 | textarea: HTMLTextAreaElement, |
| 20 | selectionStart: number, |
| 21 | selectionEnd: number, |
| 22 | ): boolean => { |
| 23 | const text = textarea.value; |
| 24 | |
| 25 | // Look backwards from selection start to find the structure |
| 26 | let openBracketIndex = -1; |
| 27 | let closeBracketIndex = -1; |
| 28 | let openParenIndex = -1; |
| 29 | |
| 30 | for (let i = selectionStart - 1; i >= 0; i -= 1) { |
| 31 | if (text[i] === '(' && openParenIndex === -1) { |
| 32 | openParenIndex = i; |
| 33 | } else if (text[i] === ']' && closeBracketIndex === -1) { |
| 34 | closeBracketIndex = i; |
| 35 | } else if (text[i] === '[' && openBracketIndex === -1) { |
| 36 | openBracketIndex = i; |
| 37 | break; |
| 38 | } |
| 39 | // If we hit a newline, stop looking |
| 40 | if (text[i] === '\n') { |
| 41 | return false; |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | // Look forward from selection end to find closing parenthesis |
| 46 | let closeParenIndex = -1; |
| 47 | let forwardCloseBracketIndex = -1; |
| 48 | let forwardOpenParenIndex = -1; |
| 49 | |
| 50 | for (let i = selectionEnd; i < text.length; i += 1) { |
| 51 | if (text[i] === ']' && forwardCloseBracketIndex === -1) { |
| 52 | forwardCloseBracketIndex = i; |
| 53 | } else if ( |
| 54 | text[i] === '(' && |
| 55 | forwardCloseBracketIndex !== -1 && |
| 56 | forwardOpenParenIndex === -1 |
| 57 | ) { |
| 58 | forwardOpenParenIndex = i; |
| 59 | } else if (text[i] === ')') { |
| 60 | closeParenIndex = i; |
| 61 | break; |
| 62 | } |
| 63 | // If we hit a newline, stop looking |
| 64 | if (text[i] === '\n') { |
| 65 | return false; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | // Case 1: Selection is in the text part [text](url) |
| 70 | if ( |
| 71 | openBracketIndex !== -1 && |
| 72 | forwardCloseBracketIndex !== -1 && |
| 73 | forwardOpenParenIndex !== -1 && |
| 74 | closeParenIndex !== -1 |
| 75 | ) { |
no outgoing calls
no test coverage detected