docs: switch templates to dynamic tab highlighting; prep for devsite template migration

Change-Id: I5785c63603d8da5dfa1118fe28a3106aa20835a6
diff --git a/tools/droiddoc/templates-sdk/assets/js/docs.js b/tools/droiddoc/templates-sdk/assets/js/docs.js
index 394dbe4..ded3eaf 100644
--- a/tools/droiddoc/templates-sdk/assets/js/docs.js
+++ b/tools/droiddoc/templates-sdk/assets/js/docs.js
@@ -112,7 +112,7 @@
   if (pagePath.indexOf("/intl/") == 0) {
     pagePath = pagePath.substr(pagePath.indexOf("/",6)); // start after intl/ to get last /
   }
-  
+
   if (pagePath.indexOf(SITE_ROOT) == 0) {
     if (pagePath == '' || pagePath.charAt(pagePath.length - 1) == '/') {
       pagePath += 'index.html';
@@ -138,12 +138,47 @@
     // Otherwise the page path is already an absolute URL
   }
 
-  // select current page in sidenav and set up prev/next links if they exist
+  // Highlight the header tabs...
+  // highlight Design tab
+  if ($("body").hasClass("design")) {
+    $("#header li.design a").addClass("selected");
+
+  // highlight Develop tab
+  } else if ($("body").hasClass("develop") || $("body").hasClass("google")) {
+    $("#header li.develop a").addClass("selected");
+
+    // In Develop docs, also highlight appropriate sub-tab
+    var rootDir = pagePath.substring(1,pagePath.indexOf('/', 1));
+    if (rootDir == "training") {
+      $("#nav-x li.training a").addClass("selected");
+    } else if (rootDir == "guide") {
+      $("#nav-x li.guide a").addClass("selected");
+    } else if (rootDir == "reference") {
+      // If the root is reference, but page is also part of Google Services, select Google
+      if ($("body").hasClass("google")) {
+        $("#nav-x li.google a").addClass("selected");
+      } else {
+        $("#nav-x li.reference a").addClass("selected");
+      }
+    } else if ((rootDir == "tools") || (rootDir == "sdk")) {
+      $("#nav-x li.tools a").addClass("selected");
+    } else if ($("body").hasClass("google")) {
+      $("#nav-x li.google a").addClass("selected");
+    }
+
+  // highlight Distribute tab
+  } else if ($("body").hasClass("distribute")) {
+    $("#header li.distribute a").addClass("selected");
+  }
+
+
+  // select current page in sidenav and header, and set up prev/next links if they exist
   var $selNavLink = $('#nav').find('a[href="' + pagePath + '"]');
   var $selListItem;
   if ($selNavLink.length) {
-    $selListItem = $selNavLink.closest('li');
 
+    // Find this page's <li> in sidenav and set selected
+    $selListItem = $selNavLink.closest('li');
     $selListItem.addClass('selected');
     
     // Traverse up the tree and expand all parent nav-sections
@@ -151,7 +186,6 @@
       $(this).addClass('expanded');
       $(this).children('ul').show();
     });
-    
 
     // set up prev links
     var $prevLink = [];
diff --git a/tools/droiddoc/templates-sdk/components/masthead.cs b/tools/droiddoc/templates-sdk/components/masthead.cs
index fc16161..9f19906 100644
--- a/tools/droiddoc/templates-sdk/components/masthead.cs
+++ b/tools/droiddoc/templates-sdk/components/masthead.cs
@@ -13,8 +13,7 @@
           </div>
             <ul class="nav-x col-9">
                 <li class="design">
-                  <a href="<?cs var:toroot ?>design/index.html" <?cs
-                  if:design ?>class="selected"<?cs /if ?>
+                  <a href="<?cs var:toroot ?>design/index.html"
                   zh-TW-lang="設計"
                   zh-CN-lang="设计"
                   ru-lang="Проектирование"
@@ -22,8 +21,7 @@
                   ja-lang="設計"
                   es-lang="Diseñar"               
                   >Design</a></li>
-                <li class="develop"><a href="<?cs var:toroot ?>develop/index.html" <?cs
-                  if:training || guide || reference || tools || develop || google ?>class="selected"<?cs /if ?>
+                <li class="develop"><a href="<?cs var:toroot ?>develop/index.html"
                   zh-TW-lang="開發"
                   zh-CN-lang="开发"
                   ru-lang="Разработка"
@@ -31,8 +29,7 @@
                   ja-lang="開発"
                   es-lang="Desarrollar"               
                   >Develop</a></li>
-                <li class="distribute last"><a href="<?cs var:toroot ?>distribute/index.html" <?cs
-                  if:distribute ?>class="selected"<?cs /if ?>
+                <li class="distribute last"><a href="<?cs var:toroot ?>distribute/index.html"
                   zh-TW-lang="發佈"
                   zh-CN-lang="分发"
                   ru-lang="Распространение"
@@ -203,8 +200,7 @@
     <div id="nav-x">
         <div class="wrap">
             <ul class="nav-x col-9 develop" style="width:100%">
-                <li><a href="<?cs var:toroot ?>training/index.html" <?cs
-                  if:training ?>class="selected"<?cs /if ?>
+                <li class="training"><a href="<?cs var:toroot ?>training/index.html"
                   zh-TW-lang="訓練課程"
                   zh-CN-lang="培训"
                   ru-lang="Курсы"
@@ -212,8 +208,7 @@
                   ja-lang="トレーニング"
                   es-lang="Capacitación"               
                   >Training</a></li>
-                <li><a href="<?cs var:toroot ?>guide/components/index.html" <?cs
-                  if:guide ?>class="selected"<?cs /if ?>
+                <li class="guide"><a href="<?cs var:toroot ?>guide/components/index.html"
                   zh-TW-lang="API 指南"
                   zh-CN-lang="API 指南"
                   ru-lang="Руководства по API"
@@ -221,8 +216,7 @@
                   ja-lang="API ガイド"
                   es-lang="Guías de la API"               
                   >API Guides</a></li>
-                <li><a href="<?cs var:toroot ?>reference/packages.html" <?cs
-                  if:reference && !(reference.gcm || reference.gms) ?>class="selected"<?cs /if ?>
+                <li class="reference"><a href="<?cs var:toroot ?>reference/packages.html"
                   zh-TW-lang="參考資源"
                   zh-CN-lang="参考"
                   ru-lang="Справочник"
@@ -230,8 +224,7 @@
                   ja-lang="リファレンス"
                   es-lang="Referencia"               
                   >Reference</a></li>
-                <li><a href="<?cs var:toroot ?>tools/index.html" <?cs
-                  if:tools ?>class="selected"<?cs /if ?>
+                <li class="tools"><a href="<?cs var:toroot ?>tools/index.html"
                   zh-TW-lang="相關工具"
                   zh-CN-lang="工具"
                   ru-lang="Инструменты"
@@ -239,8 +232,7 @@
                   ja-lang="ツール"
                   es-lang="Herramientas"
                   >Tools</a></li>
-                <li><a href="<?cs var:toroot ?>google/index.html" <?cs
-                  if:google || reference.gcm || reference.gms?>class="selected"<?cs /if ?>
+                <li class="google"><a href="<?cs var:toroot ?>google/index.html"
                   >Google Services</a>
                 </li>
             </ul>