Function nodeAndOffsetInLineMap

static/libs/codemirror.js:2499–2535

(map$$1, ch, bias)

var nullRect = {left: 0, right: 0, top: 0, bottom: 0};

function nodeAndOffsetInLineMap(map$$1, ch, bias) {
  var node, start, end, collapse, mStart, mEnd;
  // First, search the line map for the text node corresponding to,
  // or closest to, the target character.
  for (var i = 0; i < map$$1.length; i += 3) {
    mStart = map$$1[i];
    mEnd = map$$1[i + 1];
    if (ch < mStart) {
      start = 0; end = 1;
      collapse = "left";
    } else if (ch < mEnd) {
      start = ch - mStart;
      end = start + 1;
    } else if (i == map$$1.length - 3 || ch == mEnd && map$$1[i + 3] > ch) {
      end = mEnd - mStart;
      start = end - 1;
      if (ch >= mEnd) { collapse = "right"; }
    }
    if (start != null) {
      node = map$$1[i + 2];
      if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
        { collapse = bias; }
      if (bias == "left" && start == 0)
        { while (i && map$$1[i - 2] == map$$1[i - 3] && map$$1[i - 1].insertLeft) {
          node = map$$1[(i -= 3) + 2];
          collapse = "left";
        } }
      if (bias == "right" && start == mEnd - mStart)
        { while (i < map$$1.length - 3 && map$$1[i + 3] == map$$1[i + 4] && !map$$1[i + 5].insertLeft) {
          node = map$$1[(i += 3) + 2];
          collapse = "right";
        } }
      break
    }
  }
  return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
}

function getUsefulRect(rects, bias) {
  var rect = nullRect;