| // 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. |
| |
| #ifndef IOS_CHROME_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_TAB_HELPER_H_ |
| #define IOS_CHROME_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_TAB_HELPER_H_ |
| |
| #include <memory> |
| |
| #import <Foundation/Foundation.h> |
| |
| #include "base/macros.h" |
| #include "ios/web/public/download/download_task_observer.h" |
| #import "ios/web/public/web_state/web_state_observer.h" |
| #import "ios/web/public/web_state/web_state_user_data.h" |
| |
| @protocol DownloadManagerTabHelperDelegate; |
| namespace web { |
| class DownloadTask; |
| class WebState; |
| } // namespace web |
| |
| // TabHelper which manages a single file download. |
| class DownloadManagerTabHelper |
| : public web::WebStateUserData<DownloadManagerTabHelper>, |
| public web::WebStateObserver, |
| public web::DownloadTaskObserver { |
| public: |
| ~DownloadManagerTabHelper() override; |
| |
| // Creates TabHelper. |delegate| is not retained by TabHelper. |web_state| |
| // must not be null. |
| static void CreateForWebState(web::WebState* web_state, |
| id<DownloadManagerTabHelperDelegate> delegate); |
| |
| // Asynchronously downloads a file using the given |task|. |
| virtual void Download(std::unique_ptr<web::DownloadTask> task); |
| |
| // Returns |true| after Download() was called, |false| after the task was |
| // cancelled. |
| bool has_download_task() const { return task_.get(); } |
| |
| protected: |
| // Allow subclassing from DownloadManagerTabHelper for testing purposes. |
| DownloadManagerTabHelper(web::WebState* web_state, |
| id<DownloadManagerTabHelperDelegate> delegate); |
| |
| private: |
| // web::WebStateObserver overrides: |
| void WasShown(web::WebState* web_state) override; |
| void WasHidden(web::WebState* web_state) override; |
| void WebStateDestroyed(web::WebState* web_state) override; |
| |
| // web::DownloadTaskObserver overrides: |
| void OnDownloadUpdated(web::DownloadTask* task) override; |
| |
| // Returns key for using with NetworkActivityIndicatorManager. |
| NSString* GetNetworkActivityKey() const; |
| |
| // Assigns |task| to |task_|; replaces the current download if exists; |
| // instructs the delegate that download has started. |
| void DidCreateDownload(std::unique_ptr<web::DownloadTask> task); |
| |
| web::WebState* web_state_ = nullptr; |
| __weak id<DownloadManagerTabHelperDelegate> delegate_ = nil; |
| std::unique_ptr<web::DownloadTask> task_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DownloadManagerTabHelper); |
| }; |
| |
| #endif // IOS_CHROME_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_TAB_HELPER_H_ |