c3410649af2d12dcfdb396a403b25524eb3d4291
max
  Wed Oct 7 05:15:24 2020 -0700
fixing analytics link tracking breaking hgBlat, refs #21916

diff --git src/hg/lib/googleAnalytics.c src/hg/lib/googleAnalytics.c
index 4e1b436..7c0413f 100644
--- src/hg/lib/googleAnalytics.c
+++ src/hg/lib/googleAnalytics.c
@@ -24,54 +24,64 @@
     return;
 
 /* updated to Universal Analytics code 2014-06-19 */
 
 jsInlineF(
 "  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){\n"
 "  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),\n"
 "  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)\n"
 "  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');\n"
 "  ga('create', '%s', 'auto');\n"
 "  ga('require', 'displayfeatures');\n"
 "  ga('set', 'transport', 'beacon');\n"
 "  ga('send', 'pageview');\n"
 "\n"
 , analyticsKey);
+
+// to reduce the risk of breaking existing click handlers, only track links on hgc and hgTracks pages
+char* scriptName = getenv("SCRIPT_NAME");
+if (!scriptName)
+    return;
+
+char* cgiName = basename(scriptName);
+if (sameWord(cgiName, "hgc") || sameWord(cgiName, "hgTracks"))
+{
 // see https://support.google.com/analytics/answer/1136920?hl=en
 jsInlineF(
 "  function anchorClicked(ev) {\n"
 "  /* user clicked an anchor: if external link, send event to Google analytics and navigate to the link */\n"
 "      var isExternal = (ev.currentTarget.target.toLowerCase()==='_blank');\n"
 "      var url = ev.currentTarget.href;\n"
 "      var hostname = null;\n"
 "      if (typeof URL===undefined) {\n"
 "          hostname = url.split('//')[1].split('/')[0];\n" // for MSIE
 "      } else {\n"
 "          var urlObj = new URL(url);\n"
 "          hostname = urlObj.hostname;\n"
 "          if (hostname.indexOf('.ncbi.')!==-1)\n" // for NCBI, we keep the first part of the pathname
 "              hostname = hostname+'/'+urlObj.pathname.split('/')[1];\n"
 "      }\n"
 "      if (isExternal) {\n"
 "         ga('send', 'event', 'outbound', 'click', hostname, url,\n"
 "           { 'transport': 'beacon', 'hitCallback': function(){window.open(url);} });\n"
 "      } else {\n"
 "         document.location=url;\n"
 "      }\n"
 "      return false;\n"
 "  }"
 "  $(document).ready(function() {\n"
 "      if (!window.ga || ga.loaded)\n" // When using an Adblocker, the ga object does not exist
 "          return;\n"
 "      var anchors = document.getElementsByTagName('a');\n"
 "      for (var i = 0; i < anchors.length; i++) { \n"
 "           var a = anchors[i];\n"
 "           if (a.attributes.href && a.attributes.href.value!=='#')\n" // do not run on javascript links
-"               a.onclick = anchorClicked;"
+"               a.onclick = anchorClicked;" // addEventHandler would not work here, the default click stops propagation.
 "      };\n"
 "      // on hgTracks: send an event with the current db, so we can report popularity of assemblies to NIH\n"
 "      if (typeof hgTracks !== undefined)\n"
 "          ga('send', 'event', 'hgTracks', 'load', getDb());\n"
 "  });"
 );
+}
 
 }