| // Copyright 2014 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_WEB_WEBUI_URL_DATA_MANAGER_IOS_H_ |
| #define IOS_WEB_WEBUI_URL_DATA_MANAGER_IOS_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/supports_user_data.h" |
| |
| namespace web { |
| class BrowserState; |
| class URLDataSourceIOS; |
| class URLDataSourceIOSImpl; |
| class WebUIIOSDataSource; |
| |
| // To serve dynamic data off of chrome: URLs, implement the |
| // URLDataManagerIOS::DataSource interface and register your handler |
| // with AddDataSource. DataSources must be added on the UI thread (they are also |
| // deleted on the UI thread). Internally the DataSources are maintained by |
| // URLDataManagerIOSBackend, see it for details. |
| class URLDataManagerIOS : public base::SupportsUserData::Data { |
| public: |
| explicit URLDataManagerIOS(BrowserState* browser_state); |
| ~URLDataManagerIOS() override; |
| |
| // Adds a DataSource to the collection of data sources. This *must* be invoked |
| // on the UI thread. |
| // |
| // If |AddDataSource| is called more than once for a particular name it will |
| // release the old |DataSource|, most likely resulting in it getting deleted |
| // as there are no other references to it. |DataSource| uses the |
| // |DeleteOnUIThread| trait to insure that the destructor is called on the UI |
| // thread. This is necessary as some |DataSource|s notably |FileIconSource| |
| // and |FaviconSource|, have members that will DCHECK if they are not |
| // destructed in the same thread as they are constructed (the UI thread). |
| void AddDataSource(URLDataSourceIOSImpl* source); |
| |
| // Deletes any data sources no longer referenced. This is normally invoked |
| // for you, but can be invoked to force deletion (such as during shutdown). |
| static void DeleteDataSources(); |
| |
| // Convenience wrapper function to add |source| to |browser_context|'s |
| // |URLDataManagerIOS|. Creates a URLDataSourceIOSImpl to wrap the given |
| // source. |
| static void AddDataSource(BrowserState* browser_context, |
| URLDataSourceIOS* source); |
| |
| // Adds a WebUI data source to |browser_context|'s |URLDataManagerIOS|. |
| static void AddWebUIIOSDataSource(BrowserState* browser_state, |
| WebUIIOSDataSource* source); |
| |
| private: |
| friend class URLDataSourceIOSImpl; |
| friend struct DeleteURLDataSourceIOS; |
| typedef std::vector<const URLDataSourceIOSImpl*> URLDataSources; |
| |
| // Invoked on the IO thread to do the actual adding of the DataSource. |
| static void AddDataSourceOnIOThread( |
| BrowserState* browser_state, |
| scoped_refptr<URLDataSourceIOSImpl> data_source); |
| |
| // If invoked on the UI thread the DataSource is deleted immediatlye, |
| // otherwise it is added to |data_sources_| and a task is scheduled to handle |
| // deletion on the UI thread. See note abouve DeleteDataSource for more info. |
| static void DeleteDataSource(const URLDataSourceIOSImpl* data_source); |
| |
| // Returns true if |data_source| is scheduled for deletion (|DeleteDataSource| |
| // was invoked). |
| static bool IsScheduledForDeletion(const URLDataSourceIOSImpl* data_source); |
| |
| BrowserState* browser_state_; |
| |
| // |data_sources_| that are no longer referenced and scheduled for deletion. |
| // Protected by g_delete_lock in the .cc file. |
| static URLDataSources* data_sources_; |
| |
| DISALLOW_COPY_AND_ASSIGN(URLDataManagerIOS); |
| }; |
| |
| } // namespace web |
| |
| #endif // IOS_WEB_WEBUI_URL_DATA_MANAGER_IOS_H_ |