User:Kaldari/ReferenceTooltips.js

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Documentation for this user script can be added at User:Kaldari/ReferenceTooltips. This user script seems to have an accompanying .css page at User:Kaldari/ReferenceTooltips.css.

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// See [[mw:Reference Tooltips]]

window.pg || $(document).ready( function($) {

  // Make sure we are in article, project, or help namespace
  if ( wgCanonicalNamespace === '' || wgCanonicalNamespace === 'Project' || wgCanonicalNamespace === 'Help' ) {
    
    $(".reference").each( function() {
      var tooltipNode, hideTimer, showTimer;
      function findRef( h ){
        h = h.firstChild.getAttribute("href"); h = h && h.split("#"); h = h && h[1];
        h = h && document.getElementById( h );
        return h;
      }
      function hide(){
        if( tooltipNode && tooltipNode.parentNode == document.body ) {
          hideTimer = setTimeout( function() {
            $(tooltipNode).animate({opacity: 0}, 100, function(){ document.body.removeChild( tooltipNode ) })
          }, 100)
        } else {
          var h = findRef( this );
          h && (h.style.border = "");
        }
      }
      function show(){
        if( !tooltipNode.parentNode || tooltipNode.parentNode.nodeType === 11 ){
          document.body.appendChild( tooltipNode );
        }
        $(tooltipNode).stop().animate({opacity: 1}, 100)
        clearTimeout( hideTimer );
      }
      $(this).hover(function(){
        var _this = this;
        if( showTimer ) {
          clearTimeout( showTimer );
        }
        showTimer = setTimeout(function() {
          var h = findRef( _this );
          if( !h ){return};
          if( ( window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0 ) + $(window).height() > $( h ).offset().top ) {
            h.style.border = "#080086 2px solid";
            return;
          }
          if(!tooltipNode){
            tooltipNode = document.createElement("ul");
            tooltipNode.className = "referencetooltip";
            var c = tooltipNode.appendChild( h.cloneNode( true ) );
            try {
              if( c.firstChild.nodeName != "A" ) {
                while( c.childNodes[1].nodeName == "A" && c.childNodes[1].getAttribute( "href" ).indexOf("#cite_ref-") !== -1 ) {
                  do { c.removeChild( c.childNodes[1] ) } while ( c.childNodes[1].nodeValue == " " );
                }
              }
            } catch (e) { mw.log(e) }
            c.removeChild( c.firstChild );
            tooltipNode.appendChild( document.createElement( "li" ) );
            $(tooltipNode).hover(show, hide);
          }
          show();
          var o = $(_this).offset(), oH = tooltipNode.offsetHeight;
          $(tooltipNode).css({top: o.top - oH, left: o.left - 7 });
          if( tooltipNode.offsetHeight > oH ) { // is it squished against the right side of the page?
            $(tooltipNode).css({left:'auto',right:0});
            tooltipNode.lastChild.style.marginLeft = (o.left - tooltipNode.offsetLeft) + "px";
          }
        }, 300);
      },
      function(){
        clearTimeout( showTimer );
        hide();
      } );
    } );
        
  }

} );