feat(tabs): Change directive name, add features

* Rename 'tabs' directive to 'tabset', and 'pane' directive to 'tab'.
 The new syntax is more intuitive; The word pane does not obviously
 represent a subset of a tab group. (Closes #186)
* Add 'tab-heading' directive, which is a child of a 'tab'. Allows
HTML in tab headings. (Closes #124)
* Add option for a 'select' attribute callback when a tab is selected.
 (Closes #141)
* Tabs transclude to title elements instead of content elements. Now the
 ordering of tab titles is always correct. (Closes #153)

BREAKING CHANGE: The 'tabs' directive has been renamed to 'tabset', and
 the 'pane' directive has been renamed to 'tab'.

    To migrate your code, follow the example below.

    Before:

    <tabs>
      <pane heading="one">
        First Content
      </pane>
      <pane ng-repeat="apple in basket" heading="{{apple.heading}}">
        {{apple.content}}
      </pane>
    </tabs>

    After:

    <tabset>
      <tab heading="one">
        First Content
      </tab>
      <tab ng-repeat="apple in basket" heading="{{apple.heading}}">
        {{apple.content}}
      </tab>
    </tabset>

misc/demo/index.html

@@ -182,10 +182,14 @@ <h1><%= module.displayName %><small>
                 <div class="pull-right">
                     <button class="btn btn-info" id="plunk-btn" ng-click="edit('<%= ngversion%>', '<%= bsversion %>', '<%= pkg.version%>', '<%= module.name %>')"><i class="icon-edit icon-white"></i> Edit in plunker</button>
                 </div>
-                <tabs>
-                    <pane heading="Markup" plunker-content="markup"><pre ng-non-bindable><code data-language="html"><%- module.docs.html %></code></pre></pane>
-                    <pane heading="JavaScript" plunker-content="javascript"><pre ng-non-bindable><code data-language="javascript"><%- module.docs.js %></code></pre></pane>
-                </tabs>
+                <tabset>
+                    <tab heading="Markup" plunker-content="markup">
+                      <pre ng-non-bindable><code data-language="html"><%- module.docs.html %></code></pre>
+                    </tab>
+                    <tab heading="JavaScript" plunker-content="javascript">
+                      <pre ng-non-bindable><code data-language="javascript"><%- module.docs.js %></code></pre>
+                    </tab>
+                </tabset>
             </div>
         </div>
       </section>

src/tabs/docs/demo.html

@@ -1,10 +1,23 @@
 <div ng-controller="TabsDemoCtrl">
-    <tabs>
-        <pane heading="Static title">Static content</pane>
-        <pane ng-repeat="pane in panes" heading="{{pane.title}}" active="pane.active">{{pane.content}}</pane>
-    </tabs>
-    <div class="row-fluid">
-        <button class="btn" ng-click="panes[0].active = true">Select second tab</button>
-        <button class="btn" ng-click="panes[1].active = true">Select third tab</button>
-    </div>
-</div>
+  Select a tab by setting active binding to true:
+  <br />
+  <button class="btn" ng-click="tabs[0].active = true">
+    Select second tab
+  </button>
+  <button class="btn" ng-click="tabs[1].active = true">
+    Select third tab
+  </button>
+  <br /><br />
+  <tabset>
+    <tab heading="Static title">Static content</tab>
+    <tab ng-repeat="tab in tabs" heading="{{tab.title}}" active="tab.active">
+      {{tab.content}}
+    </tab>
+    <tab select="alertMe()">
+      <tab-heading>
+        <i class="icon-bell"></i> Select me for alert!
+      </tab-heading>
+      I've got an HTML heading, and a select callback. Pretty cool!
+    </tab>
+  </tabset>
+</div>

src/tabs/docs/demo.js

@@ -1,6 +1,12 @@
 var TabsDemoCtrl = function ($scope) {
-  $scope.panes = [
+  $scope.tabs = [
     { title:"Dynamic Title 1", content:"Dynamic content 1" },
     { title:"Dynamic Title 2", content:"Dynamic content 2" }
   ];
-};
+
+  $scope.alertMe = function() {
+    setTimeout(function() {
+      alert("You've selected the alert tab!");
+    });
+  };
+};

src/tabs/docs/readme.md

@@ -1 +1,5 @@
-AngularJS version of the tabs directive.
+AngularJS version of the tabs directive.
+
+Allows a `select` callback attribute, and `active` binding attribute.
+
+Allows either `heading` text-heading as an attribute, or a `<tab-heading>` element inside as the heading.

src/tabs/tabs.js

@@ -1,75 +1,168 @@
 angular.module('ui.bootstrap.tabs', [])
-.controller('TabsController', ['$scope', '$element', function($scope, $element) {
-  var panes = $scope.panes = [];
 
-  this.select = $scope.select = function selectPane(pane) {
-    angular.forEach(panes, function(pane) {
-      pane.selected = false;
-    });
-    pane.selected = true;
+.directive('tabs', function() {
+  return function() {
+    throw new Error("The `tabs` directive is deprecated, please migrate to `tabset`. Instructions can be found at http://github.com/angular-ui/bootstrap/tree/master/CHANGELOG.md");
   };
+})
 
-  this.addPane = function addPane(pane) {
-    if (!panes.length) {
-      $scope.select(pane);
+.controller('TabsetController', ['$scope', '$element', 
+function TabsetCtrl($scope, $element) {
+  var ctrl = this,
+    tabs = ctrl.tabs = $scope.tabs = [];
+
+  ctrl.select = function(tab) {
+    angular.forEach(tabs, function(tab) {
+      tab.active = false;
+    });  
+    tab.active = true;
+  };
+
+  ctrl.addTab = function addTab(tab) {
+    tabs.push(tab);
+    if (tabs.length == 1) {
+      ctrl.select(tab);
     }
-    panes.push(pane);
   };
 
-  this.removePane = function removePane(pane) { 
-    var index = panes.indexOf(pane);
-    panes.splice(index, 1);
-    //Select a new pane if removed pane was selected 
-    if (pane.selected && panes.length > 0) {
-      $scope.select(panes[index < panes.length ? index : index-1]);
+  ctrl.removeTab = function removeTab(tab) { 
+    var index = tabs.indexOf(tab);
+    //Select a new tab if the tab to be removed is selected
+    if (tab.active && tabs.length > 1) {
+      //If this is the last tab, select the previous tab. else, the next tab.
+      var newActiveIndex = index == tabs.length - 1 ? index - 1 : index + 1;
+      ctrl.select(tabs[newActiveIndex]);
     }
+    tabs.splice(index, 1);
   };
 }])
-.directive('tabs', function() {
+
+.directive('tabset', function() {
   return {
     restrict: 'EA',
     transclude: true,
     scope: {},
-    controller: 'TabsController',
-    templateUrl: 'template/tabs/tabs.html',
-    replace: true
+    controller: 'TabsetController',
+    templateUrl: 'template/tabs/tabset.html'
   };
 })
-.directive('pane', ['$parse', function($parse) {
+
+.directive('tab', ['$parse', '$http', '$templateCache', '$compile',
+function($parse, $http, $templateCache, $compile) {
   return {
-    require: '^tabs',
+    require: '^tabset',
     restrict: 'EA',
+    replace: true,
+    templateUrl: 'template/tabs/tab.html',
     transclude: true,
-    scope:{
-      heading:'@'
+    scope: {
+      heading: '@',
+      onSelect: '&select' //This callback is called in contentHeadingTransclude
+                          //once it inserts the tab's content into the dom
+    },
+    controller: function() {
+      //Empty controller so other directives can require being 'under' a tab
     },
-    link: function(scope, element, attrs, tabsCtrl) {
-      var getSelected, setSelected;
-      scope.selected = false;
-      if (attrs.active) {
-        getSelected = $parse(attrs.active);
-        setSelected = getSelected.assign;
-        scope.$watch(
-          function watchSelected() {return getSelected(scope.$parent);},
-          function updateSelected(value) {scope.selected = value;}
-        );
-        scope.selected = getSelected ? getSelected(scope.$parent) : false;
-      }
-      scope.$watch('selected', function(selected) {
-        if(selected) {
-          tabsCtrl.select(scope);
+    compile: function(elm, attrs, transclude) {
+      return function postLink(scope, elm, attrs, tabsetCtrl) {
+        var getActive, setActive;
+        scope.active = false; // default value
+        if (attrs.active) {
+          getActive = $parse(attrs.active);
+          setActive = getActive.assign;
+          scope.$parent.$watch(getActive, function updateActive(value) {
+            scope.active = !!value;
+          });
+        } else {
+          setActive = getActive = angular.noop;
         }
-        if(setSelected) {
-          setSelected(scope.$parent, selected);
+
+        scope.$watch('active', function(active) {
+          setActive(scope.$parent, active);
+          if (active) {
+            tabsetCtrl.select(scope);
+            scope.onSelect();
+          }
+        });
+
+        scope.select = function() {
+          scope.active = true;
+        };
+
+        tabsetCtrl.addTab(scope);
+        scope.$on('$destroy', function() {
+          tabsetCtrl.removeTab(scope);
+        });
+        //If the tabset sets this tab to active, set the parent scope's active
+        //binding too.  We do this so the watch for the parent's initial active
+        //value won't overwrite what is initially set by the tabset
+        if (scope.active) {
+          setActive(scope.$parent, true);
+        } 
+
+        //Transclude the collection of sibling elements. Use forEach to find
+        //the heading if it exists. We don't use a directive for tab-heading
+        //because it is problematic. Discussion @ http://git.io/MSNPwQ
+        transclude(scope.$parent, function(clone) {
+          //Look at every element in the clone collection. If it's tab-heading,
+          //mark it as that.  If it's not tab-heading, mark it as tab contents
+          var contents = [], heading;
+          angular.forEach(clone, function(el) {
+            //See if it's a tab-heading attr or element directive
+            //First make sure it's a normal element, one that has a tagName
+            if (el.tagName &&
+                (el.hasAttribute("tab-heading") || 
+                 el.hasAttribute("data-tab-heading") ||
+                 el.tagName.toLowerCase() == "tab-heading" ||
+                 el.tagName.toLowerCase() == "data-tab-heading"
+                )) {
+              heading = el;
+            } else {
+              contents.push(el);
+            }
+          });
+          //Share what we found on the scope, so our tabHeadingTransclude and
+          //tabContentTransclude directives can find out what the heading and
+          //contents are.
+          if (heading) { 
+            scope.headingElement = angular.element(heading);
+          }
+          scope.contentElement = angular.element(contents);
+        });
+      };
+    }
+  };
+}])
+
+.directive('tabHeadingTransclude', [function() {
+  return {
+    restrict: 'A',
+    require: '^tab', 
+    link: function(scope, elm, attrs, tabCtrl) {
+      scope.$watch('headingElement', function updateHeadingElement(heading) {
+        if (heading) {
+          elm.html('');
+          elm.append(heading);
         }
       });
+    }
+  };
+}])
 
-      tabsCtrl.addPane(scope);
-      scope.$on('$destroy', function() {
-        tabsCtrl.removePane(scope);
+.directive('tabContentTransclude', ['$parse', function($parse) {
+  return {
+    restrict: 'A',
+    require: '^tabset',
+    link: function(scope, elm, attrs, tabsetCtrl) {
+      scope.$watch($parse(attrs.tabContentTransclude), function(tab) {
+        elm.html('');
+        if (tab) {
+          elm.append(tab.contentElement);
+        }
       });
-    },
-    templateUrl: 'template/tabs/pane.html',
-    replace: true
+    }
   };
-}]);
+}])
+
+;
+