Function updateScrollbars

static/editor.md/lib/codemirror/lib/codemirror.js:506–516

(cm, measure)

  }

  function updateScrollbars(cm, measure) {
    if (!measure) measure = measureForScrollbars(cm);
    var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
    updateScrollbarsInner(cm, measure);
    for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
      if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
        updateHeightsInViewport(cm);
      updateScrollbarsInner(cm, measureForScrollbars(cm));
      startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
    }
  }

  // Re-synchronize the fake scrollbars with the actual size of the
  // content.