Fossil

(function(){
  window.addEventListener('load',function(){
    function focusDefaultId(){
      var tn = document.querySelector('.timelineSelected .tl-nodemark') ||
                document.querySelector('.timelineCurrent .tl-nodemark');
      return tn ? tn.id : 'm1';
    }
    function focusSelectedId(){
      var tn = document.querySelector('.timelineSelected .tl-nodemark');
      return tn ? tn.id : null;
    }
    function focusCurrentId(){
      var tn = document.querySelector('.timelineCurrent .tl-nodemark');
      return tn ? tn.id : null;
    }
    function focusTickedId(){
      var nd = document.querySelector('.tl-node.sel');
      return nd ? 'm' + nd.id.slice(3) : null;
    }
    function focusFirstId(id){
      return 'm1';
    }
    function focusLastId(id){
      var el = document.getElementsByClassName('tl-nodemark');
      var tn = el ? el[el.length-1] : null;
      return tn ? tn.id : id;

      if( evt.target.tagName=='INPUT' ) return;
      var
        mSHIFT = 1<<13,
        kFRST = mSHIFT | 78 /* SHIFT+N */,
        kNEXT = 78 /* N */,
        kPREV = 77 /* M */,
        kLAST = mSHIFT | 77 /* SHIFT+M */,
        kCYCL = 72 /* H */,
        kTICK = 188 /* , */,
        kCPYH = 66 /* B */,
        kCPYB = mSHIFT | 66 /* SHIFT+B */,
        kTMLN = 74 /* J */,
        kVIEW = 75 /* K */,
        kDONE = 76 /* L */,
        mod = evt.altKey<<15 | evt.ctrlKey<<14 | evt.shiftKey<<13,
        key = ( evt.which || evt.keyCode ) | mod;
      var dx = 0;
      switch( key ){
        case kFRST: dx = -2; break;
        case kNEXT: dx = -1; break;
        case kPREV: dx = +1; break;
        case kLAST: dx = +2; break;
        case kCYCL: break;
        case kTICK: break;
        case kCPYH: break;
        case kCPYB: break;
        case kTMLN: break;
        case kVIEW: break;
        case kDONE: break;
        default: return;
      }
      if( key==kDONE ){
        focusCacheSet(null);
        focusVisualize(null,false);
        document.cookie =
          'fossil_timeline_kbnav=;expires=Thu, 01 Jan 1970 00:00:01 GMT;path=/';
        return;
      }
      document.cookie = 'fossil_timeline_kbnav=1;path=/';
      var id = focusCacheGet();
      if( id && dx==0 ){
        if( key==kCYCL ){
          var sel = focusSelectedId();
          var cur = focusCurrentId();
          var tik = focusTickedId();
          if( id==sel ) id = cur || tik || sel;
          else if( id==cur ) id = tik || sel || cur;
          else if( id==tik ) id = sel || cur || tik;
          else id = sel || cur || tik || id;
        }
        else if( key==kTICK ){
          var gn = document.getElementById('tln'+id.slice(1));
          if( gn ) gn.click();
        }
        else if( key==kCPYH || key==kCPYB ){
          var ri = timelineGetRowInfo(id);
          if( ri ){
            copyTextToClipboard(