fix(modal): skipping ESC handling for form inputs

BREAKING CHANGE: Allow the user to hit `esc` inside an element in a modal and not exit the modal if the event has been `defaultPrevented`

Closes #3551
Fixes #2544

package.json

@@ -4,6 +4,9 @@
   "version": "0.13.3-SNAPSHOT",
   "homepage": "http://angular-ui.github.io/bootstrap/",
   "dependencies": {},
+  "scripts":{
+    "test": "grunt"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/angular-ui/bootstrap.git"

src/modal/modal.js

@@ -339,6 +339,10 @@ angular.module('ui.bootstrap.modal', [])
       }
 
       $document.bind('keydown', function (evt) {
+        if (evt.isDefaultPrevented()) {
+          return evt;
+        }
+
         var modal = openedWindows.top();
         if (modal && modal.value.keyboard) {
           switch (evt.which){

src/modal/test/modal.spec.js

@@ -243,6 +243,30 @@ describe('$modal', function () {
       expect($document).toHaveModalsOpen(0);
     });
 
+    it('should not close on ESC if event.preventDefault() was issued', function () {
+      var modal = open({template: '<div><button>x</button></div>' });
+      expect($document).toHaveModalsOpen(1);
+
+      var button = angular.element('button').on('keydown', preventKeyDown);
+
+      triggerKeyDown(button, 27);
+      $rootScope.$digest();
+
+      expect($document).toHaveModalsOpen(1);
+
+      button.off('keydown', preventKeyDown);
+
+      triggerKeyDown(button, 27);
+      $animate.triggerCallbacks();
+      $rootScope.$digest();
+
+      expect($document).toHaveModalsOpen(0);
+
+      function preventKeyDown(evt) {
+        evt.preventDefault();
+      }
+    });
+
     it('should support closing on backdrop click', function () {
 
       var modal = open({template: '<div>Content</div>'});