Function wrappedLineExtent

external/.scrollLibs.js:4099–4117

(cm, lineObj, preparedMeasure, y)

  }

  function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
    y -= widgetTopHeight(lineObj)
    var end = lineObj.text.length
    var begin = findFirst(
      function (ch) {
        return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y
      },
      end,
      0
    )
    end = findFirst(
      function (ch) {
        return measureCharPrepared(cm, preparedMeasure, ch).top > y
      },
      begin,
      end
    )
    return { begin: begin, end: end }
  }

  function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
    if (!preparedMeasure) {