** If zLabel is not NULL and the graph is not empty, then output zLabel as
** a prefix to the graph.
*/
void render_backlink_graph(const char *zUuid, const char *zLabel){
  Blob sql;
  Stmt q;
  char *zGlob;
  int needEndPanel = 0;
  zGlob = mprintf("%.5s*", zUuid);
  db_multi_exec(
     "CREATE TEMP TABLE IF NOT EXISTS ok(rid INTEGER PRIMARY KEY);\n"
     "DELETE FROM ok;\n"
     "INSERT OR IGNORE INTO ok(rid)\n"
     " SELECT CASE srctype\n"
           "  WHEN 2 THEN (SELECT rid FROM tagxref WHERE tagid=backlink.srcid\n"
                          " ORDER BY mtime DESC LIMIT 1)\n"
           "  ELSE srcid END\n"
     "   FROM backlink\n"
     "  WHERE target GLOB %Q"
     "    AND %Q GLOB (target || '*');",
     zGlob, zUuid
  );
  if( !db_exists("SELECT 1 FROM ok") ) return;
  if( zLabel ){
    cgi_printf("%s", zLabel);
    if( strstr(zLabel, "accordion")!=0 ){
      cgi_printf("<div class=\"accordion_panel\">\n");
      needEndPanel = 1;
    }
  }
  blob_zero(&sql);
  blob_append(&sql, timeline_query_for_www(), -1);
  blob_append_sql(&sql, " AND event.objid IN ok ORDER BY mtime DESC");
  db_prepare(&q, "%s", blob_sql_text(&sql));
  www_print_timeline(&q,
      TIMELINE_DISJOINT|TIMELINE_GRAPH|TIMELINE_NOSCROLL|TIMELINE_REFS,
                     0, 0, 0, 0, 0, 0);
  db_finalize(&q);
  if( needEndPanel ){
    cgi_printf("</div>\n");
  }
}

/*
** WEBPAGE: test-backlink-timeline
**
** Show a timeline of all check-ins and other events that have entries
** in the backlink table.  This is used for testing the rendering

                   TAG_COMMENT, rid);
    zOrigUser = db_column_text(&q1, 2);
    zUser = zEUser ? zEUser : zOrigUser;
    zComment = db_column_text(&q1, 3);
    zDate = db_column_text(&q1,1);
    zOrigDate = db_column_text(&q1, 4);
    if( zOrigDate==0 ) zOrigDate = zDate;
    @ <div class="section accordion">Overview</div>
    @ <div class="accordion_panel">
    @ <table class="label-value">
    @ <tr><th>Comment:</th><td class="infoComment">\
    @ %!W(zEComment?zEComment:zComment)</td></tr>

    /* The Download: line */
    if( g.perm.Zip  ){
      char *zPJ = db_get("short-project-name", 0);

    blob_reset(&wiki_read_links);
    blob_reset(&wiki_add_links);
  }else{
    style_header("Check-in Information");
    login_anonymous_available();
  }
  db_finalize(&q1);
  @ </div>
  builtin_request_js("accordion.js");  
  if( !PB("nowiki") ){
    wiki_render_associated("checkin", zUuid, 0);
  }
  render_backlink_graph(zUuid, 
       "<div class=\"section accordion\">References</div>\n");
  @ <div class="section accordion">Context</div><div class="accordion_panel">
  render_checkin_context(rid, 0, 0, 0);
  @ </div><div class="section accordion">Changes</div>
  @ <div class="accordion_panel">
  @ <div class="sectionmenu">
  pCfg = construct_diff_flags(diffType, &DCfg);
  DCfg.pRe = pRe;  
  zW = (DCfg.diffFlags&DIFF_IGNORE_ALLWS)?"&w":"";
  if( diffType!=0 ){
    @ %z(chref("button","%R/%s/%T?diff=0",zPageHide,zName))\
    @ Hide&nbsp;Diffs</a>

  if( zParent ){
    @ %z(chref("button","%R/vpatch?from=%!S&to=%!S",zParent,zUuid))
    @ Patch</a>
  }
  if( g.perm.Admin ){
    @ %z(chref("button","%R/mlink?ci=%!S",zUuid))MLink Table</a>
  }
  @ </div>
  if( pRe ){
    @ <p><b>Only differences that match regular expression "%h(zRe)"
    @ are shown.</b></p>
  }
  db_prepare(&q3,
    "SELECT name,"
    "       mperm,"

    const char *zOld = db_column_text(&q3,2);
    const char *zNew = db_column_text(&q3,3);
    const char *zOldName = db_column_text(&q3, 4);
    append_file_change_line(zUuid, zName, zOld, zNew, zOldName, 
                            pCfg,mperm);
  }
  db_finalize(&q3);
  @ </div>
  append_diff_javascript(diffType);
  style_finish_page();
}

/*
** WEBPAGE: winfo
** URL:  /winfo?name=HASH