Function applyEdit

packages/core/src/editing/edit-ops.ts:1165–1267

(
  source: string,
  line: number,
  column: number,
  ops: EditOp[],
)

}

export function applyEdit(
  source: string,
  line: number,
  column: number,
  ops: EditOp[],
): ApplyEditResult {
  if (ops.length === 0) return { ok: true, source };

  const ast = parseSource(source);
  if (!ast) return { ok: false, status: 422, error: 'could not parse source' };
  const element = findElementForEdit(ast, line, column, ops);
  if (!element) return { ok: false, status: 422, error: 'no JSX element at location' };

  const splices: Splice[] = [];

  const styleOps = ops.flatMap((op) =>
    op.kind === 'set-style' ? [{ key: op.key, value: op.value }] : [],
  );
  if (styleOps.length > 0) {
    const result = buildStyleSplice(source, element, styleOps);
    if (result && 'error' in result) {
      return { ok: false, status: 422, error: result.error };
    }
    if (result) splices.push(result);
  }

  for (const op of ops) {
    if (op.kind !== 'set-text-range-style') continue;
    const result = buildTextRangeStyleSplices(
      ast,
      source,
      element,
      op.start,
      op.end,
      { key: op.key, value: op.value },
      op.prevText,
    );
    if (result && 'error' in result) return { ok: false, status: 422, error: result.error };
    if (result) splices.push(...result);
  }

  for (const op of ops) {
    if (op.kind !== 'set-text') continue;
    if (op.prevText !== undefined && (op.value.includes('\n') || op.prevText.includes('\n'))) {
      const richResult = buildTextContentSplices(element, op.value, op.prevText);
      if (!('error' in richResult)) {
        splices.push(...richResult);
        continue;
      }
    }
    const result = buildTextSplice(ast, element, op.value, op.prevText);
    if ('error' in result) {
      if (op.prevText === undefined) return { ok: false, status: 422, error: result.error };
      const richResult = buildTextContentSplices(element, op.value, op.prevText);
      if ('error' in richResult) return { ok: false, status: 422, error: result.error };
      splices.push(...richResult);
    } else {
      splices.push(result);