Function slash

external/.d3.js:13813–13820

(path, i)

// count the number of preceding backslashes escaping the forward slash: an odd
// number indicates an escaped forward slash.
function slash(path, i) {
  if (path[i] === "/") {
    let k = 0;
    while (i > 0 && path[--i] === "\\") ++k;
    if ((k & 1) === 0) return true;
  }
  return false;
}

function defaultSeparation(a, b) {
  return a.parent === b.parent ? 1 : 2;