Change keyboard shortcut context

closes #4247
- added scope to every shortcut, the scope of shortcut is default to
  'default'
- add shortcut `enter` to modal which confirm the modal
- shortcut `enter` and `esc` now have scope 'modal'
- when lunch a modal, scope is switching to 'modal', and set back to
  'default' when close
- shortcut `enter` now confirm the dialog without conflicting with route
  shortcuts

mixins/shortcuts-route.js

@@ -7,6 +7,7 @@ key.filter = function () {
     return true;
 };
 
+key.setScope('default');
 /**
  * Only routes can implement shortcuts.
  * If you need to trigger actions on the controller,
@@ -30,6 +31,15 @@ key.filter = function () {
  *      'ctrl+k': {action: 'markdownShortcut', options: 'createLink'}
  * }
  * ```
+ * You can set the scope of your shortcut by passing a scope property.
+ * ```javascript
+ * shortcuts : {
+ *   'enter': {action : 'confirmModal', scope: 'modal'}
+ * }
+ * ```
+ * If you don't specify a scope, we use a default scope called "default".
+ * To have all your shortcut work in all scopes, give it the scope "all".
+ * Find out more at the keymaster docs
  */
 var ShortcutsRoute = Ember.Mixin.create({
     registerShortcuts: function () {
@@ -37,14 +47,16 @@ var ShortcutsRoute = Ember.Mixin.create({
             shortcuts = this.get('shortcuts');
 
         Ember.keys(shortcuts).forEach(function (shortcut) {
-            key(shortcut, function (event) {
-                var action = shortcuts[shortcut],
-                    options;
-                if (Ember.typeOf(action) !== 'string') {
-                    options = action.options;
-                    action = action.action;
-                }
-                
+            var scope = shortcuts[shortcut].scope || 'default',
+                action = shortcuts[shortcut],
+                options;
+
+            if (Ember.typeOf(action) !== 'string') {
+                options = action.options;
+                action = action.action;
+            }
+
+            key(shortcut, scope, function (event) {
                 //stop things like ctrl+s from actually opening a save dialogue
                 event.preventDefault();
                 self.send(action, options);

routes/application.js

@@ -1,3 +1,4 @@
+/* global key */
 import ShortcutsRoute from 'ghost/mixins/shortcuts-route';
 
 var ApplicationRoute = Ember.Route.extend(SimpleAuth.ApplicationRouteMixin, ShortcutsRoute, {
@@ -9,7 +10,8 @@ var ApplicationRoute = Ember.Route.extend(SimpleAuth.ApplicationRouteMixin, Shor
     },
 
     shortcuts: {
-        'esc': 'closePopups'
+        'esc': {action: 'closePopups', scope: 'all'},
+        'enter': {action: 'confirmModal', scope: 'modal'}
     },
 
     actions: {
@@ -79,7 +81,9 @@ var ApplicationRoute = Ember.Route.extend(SimpleAuth.ApplicationRouteMixin, Shor
 
         openModal: function (modalName, model, type) {
             this.get('dropdown').closeDropdowns();
+            key.setScope('modal');
             modalName = 'modals/' + modalName;
+            this.set('modalName', modalName);
             // We don't always require a modal to have a controller
             // so we're skipping asserting if one exists
             if (this.controllerFor(modalName, true)) {
@@ -90,17 +94,27 @@ var ApplicationRoute = Ember.Route.extend(SimpleAuth.ApplicationRouteMixin, Shor
                     this.controllerFor(modalName).set('src', model.get(type));
                 }
             }
+
             return this.render(modalName, {
                 into: 'application',
                 outlet: 'modal'
             });
         },
 
+        confirmModal : function () {
+            var modalName = this.get('modalName');
+            this.send('closeModal');
+            if (this.controllerFor(modalName, true)) {
+                this.controllerFor(modalName).send('confirmAccept');
+            }
+        },
+
         closeModal: function () {
             this.disconnectOutlet({
                 outlet: 'modal',
                 parentView: 'application'
             });
+            key.setScope('default');
         },
 
         loadServerNotifications: function (isDelayed) {