36 lines
941 B
TypeScript
36 lines
941 B
TypeScript
/**
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* Converts a character position in text to line and column numbers.
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*
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* @param text The text content to analyze
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* @param position The character position to convert
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* @returns An object containing line and column numbers
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* @throws Will throw an error if the position is negative or exceeds the text length
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*/
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export function positionToLineAndColumn(
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text: string,
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position: number
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): { line: number; column: number } {
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if (position < 0) {
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throw new Error("Position cannot be negative");
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}
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text = text.replace("\r", "");
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if (
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position >
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text.length + 1
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// +1 to account for the cursor being after last character
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) {
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throw new Error(
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`Position ${position} exceeds text length ${text.length}`
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);
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}
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const textUpToPosition = text.substring(0, position);
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const lines = textUpToPosition.split("\n");
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const line = lines.length - 1;
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const column = lines[lines.length - 1].length;
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return { line, column };
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}
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