/* Rules governing diff layout and colors */
table.diff {
  width: 100%;
  border-spacing: 0;
  border: 1px solid black;
}
table.diff td.diffln{
  padding: 0;
}
table.diff td.diffln > pre{
  padding: 0 0.25em 0 0.5em;
  margin: 0;
}
table.diff td {
  vertical-align: top;
  padding: 0;
  overflow: hidden /*work around inner PRE slight overflow/overlap*/;
}
table.diff pre {
  margin: 0 0 0 0;
  padding: 0 0.5em;
}
table.diff td.diffln > pre {
  padding: 0 0.35em 0 0.5em;
}
table.diff td.difftxt > pre {
  min-width: 100%;
  max-width: 100%;
}
tr.diffskip.jchunk {
  /* jchunk gets added from JS to diffskip rows when they are
     plugged into the /jchunk route. */
  background-color: aliceblue;
  padding: 0;
}

    if(force || !f.colsR){
      f.colsR = document.querySelectorAll('td.difftxtr pre');
    }
    f.colsR.forEach(function(e){
      e.style.width = w + "px";
      e.style.maxWidth = w + "px";
    });
    if(0){ // seems to be unnecessary
      if(!f.allDiffs){
        f.allDiffs = document.querySelectorAll('table.diff');
      }
      w = lastWidth;
      f.allDiffs.forEach(function f(e){
        if(0 && !f.$){
          f.$ = e.getClientRects()[0];
          console.debug("diff table w =",w," f.$x",f.$);
          w - 2*f.$.x /* left margin (assume right==left, for simplicity) */;
        }
        e.style.maxWidth = w + "px";
      });
      //console.debug("checkTableWidth(",force,") lastWidth =",lastWidth);
    }
    return this;
  };

  const scrollLeft = function(event){
    //console.debug("scrollLeft",this,event);
    const table = this.parentElement/*TD*/.parentElement/*TR*/.
      parentElement/*TBODY*/.parentElement/*TABLE*/;

    if(!diff.classList.contains('scroller')){
      D.addClass(diff, 'scroller');
      diff.addEventListener('keydown', function(e){
        e = e || event;
        const len = {37: -SCROLL_LEN, 39: SCROLL_LEN}[e.keyCode];
        if( !len ) return;
        this.$txtPres[0].scrollLeft += len;
        /* ^^^ bug: if there is a 2nd column and it has a scrollbar
           but txtPres[0] does not, no scrolling happens here. We need
           to find the widest of txtPres and scroll that one. Example:
           Checkin a7fbefee38a1c522 file diff.c */
        return false;
      }, false);
    }
    return this;
  }
  window.fossil.page.tweakSbsDiffs = function(){
    document.querySelectorAll('table.splitdiff').forEach((e)=>Diff.initTableDiff);
  };
  Diff.initTableDiff().checkTableWidth();
  window.addEventListener('resize', ()=>Diff.checkTableWidth());
}, false);