add Emacs snippets (#684)

thanks!

Author: aaron-em

a1/README.md

@@ -3125,6 +3125,27 @@ Use file templates or snippets to help follow consistent styles and patterns. He
     ngservice    // creates an Angular service
     ```
 
+### Emacs
+###### [Style [Y257](#style-y257)]
+
+  - [Emacs](https://www.gnu.org/software/emacs/) snippets that follow these styles and guidelines.
+
+    - Download the [Emacs Angular snippets](assets/emacs-angular-snippets?raw=true)
+
+      Note that yasnippet categorizes snippets by major mode, and there are several Emacs major modes for editing Javascript code. The snippets are in `js2-mode`, and the other directories contain only a dotfile to reference them there.
+
+    - install [yasnippet](https://github.com/capitaomorte/yasnippet) (`M-x package-install RET yasnippet RET`)
+    - copy snippets to snippet directory, or modify your Emacs init to add snippet directory to `yas-snippet-dirs`
+
+    ```javascript
+    ngcontroller // creates an Angular controller
+    ngdirective  // creates an Angular directive
+    ngfactory    // creates an Angular factory
+    ngmodule     // creates an Angular module
+    ngservice    // creates an Angular service
+    ngfilter     // creates an Angular filter
+    ```
+    
 **[Back to top](#table-of-contents)**
 
 ## Yeoman Generator

a1/assets/emacs-angular-snippets/javascript-mode/.yas-parents

@@ -0,0 +1 @@
+js2-mode

a1/assets/emacs-angular-snippets/js-mode/.yas-parents

@@ -0,0 +1 @@
+js2-mode

a1/assets/emacs-angular-snippets/js2-mode/angular.controller.snip

@@ -0,0 +1,26 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: ngcontroller
+# key: ngcontroller
+# binding: direct-keybinding
+# --
+
+(function() {
+    'use strict';
+
+    angular
+        .module('${1:module}')
+        .controller('${2:Controller}Controller', $2Controller);
+
+    /* @ngInject */
+    function $2Controller(${3:dependencies}) {
+        var vm = this;
+        vm.title = '$2Controller';
+
+        activate();
+
+        ////////////////
+
+        function activate() {
+        }
+    }
+})();

a1/assets/emacs-angular-snippets/js2-mode/angular.directive.snip

@@ -0,0 +1,39 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: ngdirective
+# key: ngdirective
+# binding: direct-keybinding
+# --
+
+(function() {
+    'use strict';
+
+    angular
+        .module('${1:module}')
+        .directive('${2:directive}', $2);
+
+    /* @ngInject */
+    function $2(${3:dependencies}) {
+        // Usage:
+        //
+        // Creates:
+        //
+        var directive = {
+            bindToController: true,
+            controller: ${4:Controller},
+            controllerAs: '${5:vm}',
+            link: link,
+            restrict: 'A',
+            scope: {
+            }
+        };
+        return directive;
+
+        function link(scope, element, attrs) {
+        }
+    }
+
+    /* @ngInject */
+    function $4() {
+
+    }
+})();

a1/assets/emacs-angular-snippets/js2-mode/angular.factory.snip

@@ -0,0 +1,26 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: ngfactory
+# key: ngfactory
+# binding: direct-keybinding
+# --
+
+(function() {
+    'use strict';
+
+    angular
+        .module('${1:module}')
+        .factory('${2:factory}', $2);
+
+    /* @ngInject */
+    function $2(${3:dependencies}) {
+        var service = {
+            ${4:func}: $4
+        };
+        return service;
+
+        ////////////////
+
+        function $4() {
+        }
+    }
+})();

a1/assets/emacs-angular-snippets/js2-mode/angular.filter.snip

@@ -0,0 +1,23 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: ngfilter
+# key: ngfilter
+# binding: direct-keybinding
+# --
+
+(function() {
+    'use strict';
+
+    angular
+        .module('${1:module}')
+        .filter('${2:filter}', $2);
+
+    function $2() {
+        return $2Filter;
+
+        ////////////////
+        function $2Filter(${3:params}) {
+            return $3;
+        };
+    }
+
+})();

a1/assets/emacs-angular-snippets/js2-mode/angular.module.snip

@@ -0,0 +1,14 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: ngmodule
+# key: ngmodule
+# binding: direct-keybinding
+# --
+
+(function() {
+    'use strict';
+
+    angular
+        .module('${1:module}', [
+            '${2:dependencies}'
+        ]);
+})();

a1/assets/emacs-angular-snippets/js2-mode/angular.service.snip

@@ -0,0 +1,23 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: ngservice
+# key: ngservice
+# binding: direct-keybinding
+# --
+
+(function() {
+    'use strict';
+
+    angular
+        .module('${1:module}')
+        .service('${2:Service}', $2);
+
+    /* @ngInject */
+    function $2(${3:dependencies}) {
+        this.${4:func} = $4;
+
+        ////////////////
+
+        function $4() {
+        }
+    }
+})();

a1/assets/emacs-angular-snippets/js3-mode/.yas-parents

@@ -0,0 +1 @@
+js2-mode