feat($interpolate): MessageFormat extensions

Extend interpolation with MessageFormat like syntax.

Ref: <https://docs.google.com/a/google.com/document/d/1pbtW2yvtmFBikfRrJd8VAsabiFkKezmYZ_PbgdjQOVU/edit>

Example:

```html

{{recipients.length, plural, offset:1
    =0 {You gave no gifts}
    =1 { {{ recipients[0].gender, select,
              male {You gave him a gift.}
              female {You gave her a gift.}
              other {You gave them a gift.}
          }}
       }
    one { {{ recipients[0].gender, select,
              male {You gave him and one other person a gift.}
              female {You gave her and one other person a gift.}
              other {You gave them and one other person a gift.}
          }}
       }
    other {You gave {{recipients[0].gender}} and # other people gifts. }
}}
```

This is a SEPARATE module so you MUST include
angular-messageformat.min.js.  In addition, your application module
should depend on the "ngMessageFormat".
(e.g. angular.module('myApp', ['ngMessageFormat']);)

$interpolate automatically gets the new behavior.

Quick note on syntax differences from MessageFormat:
- MessageFormat directives are always inside {{ }} instead of
  single { }.  This ensures a consistent interpolation syntax (else you
  could interpolate in more than one way and have to pick one based on
  feature availability for that syntax.)
- The first word inside such syntax can be an arbitrary Angular
  expression instead of a single identifier.
- You can nest them as deep as you want.  As mentioned earlier, you
  would use {{ }} to start the nested interpolation that may optionally
  include select/plural extensions.
- Only "select" and "plural" keywords are currently recognized.
- Quoting support is coming in a future commit.
- Positional arguments/placeholders are not supported. They don't make
  sense in Angular templates anyway (they are only helpful when using
  API calls from a programming language.)
- Redefining of the startSymbol and endSymbol used for interpolation is
  not currently supported yet.

Author: chirayuk

Gruntfile.js

@@ -126,6 +126,9 @@ module.exports = function(grunt) {
       ngLocale: {
         files: { src: 'src/ngLocale/**/*.js' },
       },
+      ngMessageFormat: {
+        files: { src: 'src/ngMessageFormat/**/*.js' },
+      },
       ngMessages: {
         files: { src: 'src/ngMessages/**/*.js' },
       },
@@ -200,6 +203,10 @@ module.exports = function(grunt) {
         dest: 'build/angular-resource.js',
         src: util.wrap(files['angularModules']['ngResource'], 'module')
       },
+      messageformat: {
+        dest: 'build/angular-messageformat.js',
+        src: util.wrap(files['angularModules']['ngMessageFormat'], 'module_closure')
+      },
       messages: {
         dest: 'build/angular-messages.js',
         src: util.wrap(files['angularModules']['ngMessages'], 'module')
@@ -232,6 +239,7 @@ module.exports = function(grunt) {
       animate: 'build/angular-animate.js',
       cookies: 'build/angular-cookies.js',
       loader: 'build/angular-loader.js',
+      messageformat: 'build/angular-messageformat.js',
       messages: 'build/angular-messages.js',
       touch: 'build/angular-touch.js',
       resource: 'build/angular-resource.js',

angularFiles.js

@@ -91,6 +91,9 @@ var angularFiles = {
     'ngCookies': [
       'src/ngCookies/cookies.js'
     ],
+    'ngMessageFormat': [
+      'src/ngMessageFormat/messageformat.js'
+    ],
     'ngMessages': [
       'src/ngMessages/messages.js'
     ],
@@ -181,6 +184,7 @@ var angularFiles = {
     '@angularSrcModules',
     'src/ngScenario/browserTrigger.js',
     'test/helpers/*.js',
+    'test/ngMessageFormat/*.js',
     'test/ngMock/*.js',
     'test/ngCookies/*.js',
     'test/ngRoute/**/*.js',
@@ -209,6 +213,7 @@ var angularFiles = {
 
 angularFiles['angularSrcModules'] = [].concat(
   angularFiles['angularModules']['ngAnimate'],
+  angularFiles['angularModules']['ngMessageFormat'],
   angularFiles['angularModules']['ngMessages'],
   angularFiles['angularModules']['ngCookies'],
   angularFiles['angularModules']['ngResource'],

lib/grunt/utils.js

@@ -185,15 +185,22 @@ module.exports = {
     var mapFileName = mapFile.match(/[^\/]+$/)[0];
     var errorFileName = file.replace(/\.js$/, '-errors.json');
     var versionNumber = grunt.config('NG_VERSION').full;
+    var compilationLevel = 'SIMPLE_OPTIMIZATIONS';
+    var googDEBUG = '';
+    if (file === 'build/angular-messageformat.js') {
+      var compilationLevel = 'ADVANCED_OPTIMIZATIONS';
+      var googDEBUG = '--define goog.DEBUG=false ';
+    }
     shell.exec(
         'java ' +
             this.java32flags() + ' ' +
             '-Xmx2g ' +
             '-cp bower_components/closure-compiler/compiler.jar' + classPathSep +
             'bower_components/ng-closure-runner/ngcompiler.jar ' +
             'org.angularjs.closurerunner.NgClosureRunner ' +
-            '--compilation_level SIMPLE_OPTIMIZATIONS ' +
+            '--compilation_level ' + compilationLevel + ' ' +
             '--language_in ECMASCRIPT5_STRICT ' +
+            googDEBUG +
             '--minerr_pass ' +
             '--minerr_errors ' + errorFileName + ' ' +
             '--minerr_url http://errors.angularjs.org/' + versionNumber + '/ ' +

src/module_closure.prefix

@@ -0,0 +1,10 @@
+/**
+ * @license AngularJS v"NG_VERSION_FULL"
+ * (c) 2010-2015 Google, Inc. http://angularjs.org
+ * License: MIT
+ */
+/** @const */
+var goog = goog || {};
+/** @define {boolean} */
+goog.DEBUG = true;
+(function(window, angular, undefined) {

src/module_closure.suffix

@@ -0,0 +1,2 @@
+
+})(window, window.angular);

src/ng/interpolate.js

@@ -347,3 +347,4 @@ function $InterpolateProvider() {
   }];
 }
 
+