Function moveCharLogically

external/.scrollLibs.js:9327–9330

(line, ch, dir)

  }

  function moveCharLogically(line, ch, dir) {
    var target = skipExtendingChars(line.text, ch + dir, dir)
    return target < 0 || target > line.text.length ? null : target
  }

  function moveLogically(line, start, dir) {
    var ch = moveCharLogically(line, start.ch, dir)