Index: ios/chrome/browser/web/tab_id_tab_helper.mm |
diff --git a/ios/chrome/browser/web/tab_id_tab_helper.mm b/ios/chrome/browser/web/tab_id_tab_helper.mm |
new file mode 100644 |
index 0000000000000000000000000000000000000000..8c06375f9fa20533d771e07e16fd0ec2d3a83c2b |
--- /dev/null |
+++ b/ios/chrome/browser/web/tab_id_tab_helper.mm |
@@ -0,0 +1,35 @@ |
+// Copyright 2017 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/web/tab_id_tab_helper.h" |
+ |
+#include "base/mac/foundation_util.h" |
+#include "base/strings/sys_string_conversions.h" |
+#import "ios/web/public/serializable_user_data_manager.h" |
+ |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
+DEFINE_WEB_STATE_USER_DATA_KEY(TabIdTabHelper); |
+ |
+namespace { |
+// The key under which the tab ID is stored in the WebState's serializable user |
+// data. |
+NSString* const kTabIdKey = @"TabId"; |
+} |
+ |
+TabIdTabHelper::TabIdTabHelper(web::WebState* web_state) { |
+ web::SerializableUserDataManager* user_data_manager = |
+ web::SerializableUserDataManager::FromWebState(web_state); |
+ NSString* unique_id = base::mac::ObjCCast<NSString>( |
+ user_data_manager->GetValueForSerializationKey(kTabIdKey)); |
+ if (![unique_id length]) { |
+ unique_id = [[NSUUID UUID] UUIDString]; |
+ user_data_manager->AddSerializableData(unique_id, kTabIdKey); |
+ } |
+ tab_id_ = [unique_id copy]; |
+} |
+ |
+TabIdTabHelper::~TabIdTabHelper() = default; |