[iOS][Alert] Create files for AlertAction

Tests to follow in another CL.

Bug: 951300
Change-Id: I1e622285758b22c84986242bd39e5f4c99b0496c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1590135
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: edchin <edchin@chromium.org>
Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658496}

ios/chrome/browser/ui/alert_view_controller/BUILD.gn

@@ -4,6 +4,8 @@
 
 source_set("alert_view_controller") {
   sources = [
+    "alert_action.h",
+    "alert_action.mm",
     "alert_consumer.h",
     "alert_view_controller.h",
     "alert_view_controller.mm",

ios/chrome/browser/ui/alert_view_controller/alert_action.h

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_UI_ALERT_VIEW_CONTROLLER_ALERT_ACTION_H_
+#define IOS_CHROME_BROWSER_UI_ALERT_VIEW_CONTROLLER_ALERT_ACTION_H_
+
+#import <UIKit/UIKit.h>
+
+// This class is a replacement for UIAlertAction. UIAlertAction doesn't expose
+// its handler, rendering it unreusable.
+@interface AlertAction : NSObject
+
+// The title for this action.
+@property(nonatomic, readonly) NSString* title;
+
+// The style for this action. Matches UIAlertAction style.
+@property(nonatomic, readonly) UIAlertActionStyle style;
+
+// The unique identifier for the actions created.
+@property(nonatomic, readonly) NSInteger uniqueIdentifier;
+
+// Block to be called when this action is triggered.
+@property(nonatomic, readonly) void (^handler)(AlertAction* action);
+
+// Initializes an action with |title| and |handler|.
++ (instancetype)actionWithTitle:(NSString*)title
+                          style:(UIAlertActionStyle)style
+                        handler:(void (^)(AlertAction* action))handler;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_ALERT_VIEW_CONTROLLER_ALERT_ACTION_H_

ios/chrome/browser/ui/alert_view_controller/alert_action.mm

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "ios/chrome/browser/ui/alert_view_controller/alert_action.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@implementation AlertAction
+
+- (instancetype)initWithTitle:(NSString*)title
+                        style:(UIAlertActionStyle)style
+                      handler:(void (^)(AlertAction* action))handler {
+  self = [super init];
+  if (self) {
+    static NSInteger actionIdentifier = 0;
+    _uniqueIdentifier = ++actionIdentifier;
+    _title = [title copy];
+    _handler = handler;
+    _style = style;
+  }
+  return self;
+}
+
++ (instancetype)actionWithTitle:(NSString*)title
+                          style:(UIAlertActionStyle)style
+                        handler:(void (^)(AlertAction* action))handler {
+  return [[AlertAction alloc] initWithTitle:title style:style handler:handler];
+}
+
+@end

ios/chrome/browser/ui/alert_view_controller/alert_view_controller.h

@@ -9,26 +9,6 @@
 
 #import "ios/chrome/browser/ui/alert_view_controller/alert_consumer.h"
 
-// This class is a replacement for UIAlertAction.
-// Current limitations:
-//     Actions Styles are not supported.
-@interface AlertAction : NSObject
-
-// The title for this action.
-@property(nonatomic, readonly) NSString* title;
-
-// The style for this action. Matches UIAlertAction style.
-@property(nonatomic, readonly) UIAlertActionStyle style;
-
-// Initializes an action with |title| and |handler|.
-+ (instancetype)actionWithTitle:(NSString*)title
-                          style:(UIAlertActionStyle)style
-                        handler:(void (^)(AlertAction* action))handler;
-
-- (instancetype)init NS_UNAVAILABLE;
-
-@end
-
 // This class is a replacement for UIAlertController that supports custom
 // presentation styles, i.e. change modalPresentationStyle,
 // modalTransitionStyle, or transitioningDelegate. The style is more similar to

ios/chrome/browser/ui/alert_view_controller/alert_view_controller.mm

@@ -5,6 +5,7 @@
 #import "ios/chrome/browser/ui/alert_view_controller/alert_view_controller.h"
 
 #include "base/logging.h"
+#import "ios/chrome/browser/ui/alert_view_controller/alert_action.h"
 #import "ios/chrome/browser/ui/elements/gray_highlight_button.h"
 #import "ios/chrome/browser/ui/elements/text_field_configuration.h"
 #import "ios/chrome/browser/ui/util/uikit_ui_util.h"
@@ -65,43 +66,6 @@ constexpr int kTextfieldBackgroundColor = 0xf7f7f7;
 
 }  // namespace
 
-@interface AlertAction ()
-
-@property(nonatomic, readwrite) NSString* title;
-@property(nonatomic, readwrite) UIAlertActionStyle style;
-
-// The unique identifier for the actions created.
-@property(nonatomic) NSInteger uniqueIdentifier;
-
-// Block to be called when this action is triggered.
-@property(nonatomic, copy) void (^handler)(AlertAction* action);
-
-@end
-
-@implementation AlertAction
-
-- (instancetype)initWithTitle:(NSString*)title
-                        style:(UIAlertActionStyle)style
-                      handler:(void (^)(AlertAction* action))handler {
-  self = [super init];
-  if (self) {
-    static NSInteger actionIdentifier = 0;
-    _uniqueIdentifier = ++actionIdentifier;
-    _title = title;
-    _handler = handler;
-    _style = style;
-  }
-  return self;
-}
-
-+ (instancetype)actionWithTitle:(NSString*)title
-                          style:(UIAlertActionStyle)style
-                        handler:(void (^)(AlertAction* action))handler {
-  return [[AlertAction alloc] initWithTitle:title style:style handler:handler];
-}
-
-@end
-
 @interface AlertViewController ()
 
 // The actions for to this alert. |copy| for safety against mutable objects.

ios/showcase/alert/sc_alert_coordinator.mm

@@ -4,6 +4,7 @@
 
 #import "ios/showcase/alert/sc_alert_coordinator.h"
 
+#import "ios/chrome/browser/ui/alert_view_controller/alert_action.h"
 #import "ios/chrome/browser/ui/alert_view_controller/alert_view_controller.h"
 #import "ios/chrome/browser/ui/elements/text_field_configuration.h"