Function updateViewOffset

static/js/codemirror/codemirror.js:525–529

(cm)

  }

  function updateViewOffset(cm) {
    var off = cm.display.viewOffset = heightAtLine(cm, getLine(cm.doc, cm.display.showingFrom));
    // Position the mover div to align with the current virtual scroll position
    cm.display.mover.style.top = off + "px";
  }

  function computeIntact(intact, changes) {
    for (var i = 0, l = changes.length || 0; i < l; ++i) {