Function coordsBidiPartWrapped

external/.scrollLibs.js:4240–4282

(cm, lineObj, _lineNo, preparedMeasure, order, x, y)

  }

  function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
    // In a wrapped line, rtl text on wrapping boundaries can do things
    // that don't correspond to the ordering in our `order` array at
    // all, so a binary search doesn't work, and we want to return a
    // part that only spans one line so that the binary search in
    // coordsCharInner is safe. As such, we first find the extent of the
    // wrapped line, and then do a flat search in which we discard any
    // spans that aren't on the line.
    var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y)
    var begin = ref.begin
    var end = ref.end
    if (/\s/.test(lineObj.text.charAt(end - 1))) {
      end--
    }
    var part = null,
      closestDist = null
    for (var i = 0; i < order.length; i++) {
      var p = order[i]
      if (p.from >= end || p.to <= begin) {
        continue
      }
      var ltr = p.level != 1
      var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right
      // Weigh against spans ending before this, so that they are only
      // picked if nothing ends after
      var dist = endX < x ? x - endX + 1e9 : endX - x
      if (!part || closestDist > dist) {
        part = p
        closestDist = dist
      }
    }
    if (!part) {
      part = order[order.length - 1]
    }
    // Clip the part to the wrapped line.
    if (part.from < begin) {
      part = { from: begin, to: part.to, level: part.level }
    }
    if (part.to > end) {
      part = { from: part.from, to: end, level: part.level }
    }
    return part
  }

  var measureText
  // Compute the default text height.