feat(interaction): added service to detect last interaction

Sidenav want's to restore focus after the pane gets closed, this should only happen for keyboard interactions.
The service got created to use that feature for other components too

Fixes angular#5563 Fixes angular#5434 Closes angular#5583 Closes angular#5589

feat(interaction): add test for interaction which fakes a keyboard input and validates it

test(interaction): add interaction spec for mousedown event + formats 4 spaces to 2

style(interaction): fix styling of the previous commits

test(sidenav): add sidenav focus restore test triggered by keyboard

test(sidenav): add focus restore test for mouse and patch other one

fix(sidenav): test

fix(sidenav): replace deprecated methods, and remove aria label

test(sidenav): revert deprecated methods.

src/components/sidenav/sidenav.js

@@ -208,7 +208,7 @@ function SidenavFocusDirective() {
  *   - `<md-sidenav md-is-locked-open="$mdMedia('min-width: 1000px')"></md-sidenav>`
  *   - `<md-sidenav md-is-locked-open="$mdMedia('sm')"></md-sidenav>` (locks open on small screens)
  */
-function SidenavDirective($mdMedia, $mdUtil, $mdConstant, $mdTheming, $animate, $compile, $parse, $log, $q, $document) {
+function SidenavDirective($mdMedia, $mdUtil, $mdConstant, $mdTheming, $mdInteraction, $animate, $compile, $parse, $log, $q, $document) {
   return {
     restrict: 'E',
     scope: {
@@ -227,6 +227,7 @@ function SidenavDirective($mdMedia, $mdUtil, $mdConstant, $mdTheming, $animate,
    */
   function postLink(scope, element, attr, sidenavCtrl) {
     var lastParentOverFlow;
+    var triggeringInteractionType;
     var triggeringElement = null;
     var promise = $q.when(true);
 
@@ -289,6 +290,7 @@ function SidenavDirective($mdMedia, $mdUtil, $mdConstant, $mdTheming, $animate,
       if ( isOpen ) {
         // Capture upon opening..
         triggeringElement = $document[0].activeElement;
+        triggeringInteractionType = $mdInteraction.getLastInteractionType();
       }
 
       disableParentScroll(isOpen);
@@ -344,9 +346,9 @@ function SidenavDirective($mdMedia, $mdUtil, $mdConstant, $mdTheming, $animate,
             // When the current `updateIsOpen()` animation finishes
             promise.then(function(result) {
 
-              if ( !scope.isOpen ) {
+              if ( !scope.isOpen && triggeringElement && triggeringInteractionType && triggeringInteractionType === 'keyboard') {
                 // reset focus to originating element (if available) upon close
-                triggeringElement && triggeringElement.focus();
+                triggeringElement.focus();
                 triggeringElement = null;
               }
 

src/components/sidenav/sidenav.spec.js

@@ -173,6 +173,85 @@ describe('mdSidenav', function() {
 
   });
 
+  describe("focus", function() {
+
+    var $material, $mdInteraction;
+
+    beforeEach( inject(function(_$material_, _$mdInteraction_) {
+      $material = _$material_;
+      $mdInteraction = _$mdInteraction_;
+    }));
+
+    function flush() {
+      $material.flushInterimElement();
+    }
+
+    function setupTrigger() {
+      var el;
+      inject(function($compile, $rootScope) {
+        var parent = angular.element(document.body);
+        el = angular.element('<button>Toggle</button>');
+        parent.append(el);
+        $compile(parent)($rootScope);
+        $rootScope.$apply();
+      });
+      return el;
+    }
+
+    it("should restore after sidenav triggered by keyboard", function(done) {
+      var sidenavElement = setup('');
+      var triggerElement = setupTrigger();
+      var controller = sidenavElement.controller('mdSidenav');
+
+      triggerElement.focus();
+
+      var evt = document.createEvent("KeyboardEvent");
+      evt.initEvent("keydown", true, true, window, 0, 0, 0, 0, 13, 13);
+      triggerElement[0].dispatchEvent(evt);
+
+      controller.$toggleOpen(true);
+      flush();
+
+      triggerElement.blur();
+
+      expect(document.activeElement).not.toBe(triggerElement[0]);
+
+      controller.$toggleOpen(false);
+      flush();
+
+      expect($mdInteraction.getLastInteractionType()).toBe("keyboard");
+      expect(document.activeElement).toBe(triggerElement[0]);
+      done();
+    });
+
+    it("should not restore after sidenav triggered by mouse", function(done) {
+      var sidenavElement = setup('');
+      var triggerElement = setupTrigger();
+      var controller = sidenavElement.controller('mdSidenav');
+
+      triggerElement.focus();
+
+      var event = document.createEvent("MouseEvent");
+      event.initMouseEvent("mousedown", true, true, window, null, 0, 0, 0, 0, false, false, false, false, 0, null);
+      triggerElement[0].dispatchEvent(event);
+
+      controller.$toggleOpen(true);
+      flush();
+
+      expect(document.activeElement).toBe(triggerElement[0]);
+
+      triggerElement.blur();
+
+      controller.$toggleOpen(false);
+      flush();
+
+      expect($mdInteraction.getLastInteractionType()).toBe("mouse");
+      expect(document.activeElement).not.toBe(triggerElement[0]);
+      done();
+    });
+
+  });
+
   describe("controller Promise API", function() {
     var $material, $rootScope;
 
@@ -186,7 +265,6 @@ describe('mdSidenav', function() {
         $timeout = _$timeout_;
     }));
 
-
     it('should open(), close(), and toggle() with promises', function () {
       var el = setup('');
       var scope = el.isolateScope();

src/core/core.js

@@ -7,6 +7,7 @@ angular
     'ngAnimate',
     'material.core.animate',
     'material.core.layout',
+    'material.core.interaction',
     'material.core.gestures',
     'material.core.theming'
   ])

src/core/services/interaction/interaction.js

@@ -0,0 +1,58 @@
+angular
+  .module('material.core.interaction', [])
+  .service('$mdInteraction', MdInteractionService);
+
+function MdInteractionService($timeout) {
+  var body = angular.element(document.body);
+  var _mouseEvent = window.MSPointerEvent ? 'MSPointerDown' : window.PointerEvent ? 'pointerdown' : 'mousedown';
+  var buffer = false;
+  var timer;
+  var lastInteractionType;
+  var inputMap = {
+    'keydown': 'keyboard',
+    'mousedown': 'mouse',
+    'mouseenter': 'mouse',
+    'touchstart': 'touch',
+    'pointerdown': 'pointer',
+    'MSPointerDown': 'pointer'
+  };
+  var pointerMap = {
+    2: 'touch',
+    3: 'touch',
+    4: 'mouse'
+  };
+
+  function onInput(event) {
+    if (buffer) return;
+    var type = inputMap[event.type];
+    if (type === 'pointer') {
+      type = (typeof event.pointerType === 'number') ? pointerMap[event.pointerType] : event.pointerType;
+    }
+    lastInteractionType = type;
+  }
+
+  function onBufferInput(event) {
+    $timeout.cancel(timer);
+
+    onInput(event);
+    buffer = true;
+
+    timer = $timeout(function() {
+      buffer = false;
+    }, 1000);
+  }
+
+  body.on('keydown', onInput);
+  body.on(_mouseEvent, onInput);
+  body.on('mouseenter', onInput);
+  if ('ontouchstart' in document.documentElement) body.on('touchstart', onBufferInput);
+
+  /**
+   * Gets the last interaction type triggered by body.
+   * Possible values for return are `mouse`, `keyboard` and `touch`
+   * @returns {string}
+   */
+  this.getLastInteractionType = function() {
+    return lastInteractionType;
+  }
+}

src/core/services/interaction/interaction.spec.js

@@ -0,0 +1,26 @@
+describe("$mdInteraction", function() {
+  beforeEach(module('material.core'));
+
+  describe("last interaction type", function() {
+
+    it("imitates a basic keyboard interaction and checks it", inject(function($mdInteraction) {
+
+      var event = document.createEvent('Event');
+      event.keyCode = 37;
+      event.initEvent('keydown', false, true);
+      document.body.dispatchEvent(event);
+
+      expect($mdInteraction.getLastInteractionType()).toBe('keyboard');
+    }));
+
+    it("dispatches a mousedown event on the document body and checks it", inject(function($mdInteraction) {
+
+      var event = document.createEvent("MouseEvent");
+      event.initMouseEvent("mousedown", true, true, window, null, 0, 0, 0, 0, false, false, false, false, 0, null);
+      document.body.dispatchEvent(event);
+
+      expect($mdInteraction.getLastInteractionType()).toBe("mouse");
+    }));
+
+  });
+});