Function visibleLines

mini-code-editor/cm/lib/codemirror.js:919–925

()

    }

    function visibleLines() {
      var lh = textHeight(), top = scroller.scrollTop - paddingTop();
      var fromHeight = Math.max(0, Math.floor(top / lh));
      var toHeight = Math.ceil((top + scroller.clientHeight) / lh);
      return {from: lineAtHeight(doc, fromHeight),
              to: lineAtHeight(doc, toHeight)};
    }
    // Uses a set of changes plus the current scroll position to
    // determine which DOM updates have to be made, and makes the
    // updates.