| // Copyright 2018 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. |
| |
| #include "content/browser/web_contents/web_contents_getter_registry.h" |
| |
| #include "base/no_destructor.h" |
| |
| namespace content { |
| |
| using WebContentsGetter = WebContentsGetterRegistry::WebContentsGetter; |
| |
| // static |
| WebContentsGetterRegistry* WebContentsGetterRegistry::GetInstance() { |
| static base::NoDestructor<WebContentsGetterRegistry> instance; |
| return instance.get(); |
| } |
| |
| void WebContentsGetterRegistry::Add( |
| const base::UnguessableToken& id, |
| const WebContentsGetter& web_contents_getter) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| bool inserted = (map_.emplace(id, web_contents_getter)).second; |
| CHECK(inserted); |
| } |
| |
| void WebContentsGetterRegistry::Remove(const base::UnguessableToken& id) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| map_.erase(id); |
| } |
| |
| const WebContentsGetter& WebContentsGetterRegistry::Get( |
| const base::UnguessableToken& id) const { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| auto iter = map_.find(id); |
| if (iter == map_.end()) |
| return GetNullGetter(); |
| return iter->second; |
| } |
| |
| WebContentsGetterRegistry::WebContentsGetterRegistry() = default; |
| |
| WebContentsGetterRegistry::~WebContentsGetterRegistry() = default; |
| |
| // static |
| const WebContentsGetter& WebContentsGetterRegistry::GetNullGetter() { |
| static const base::NoDestructor<WebContentsGetter> null_getter; |
| return *null_getter; |
| } |
| |
| } // namespace content |