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- // 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/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(const URLDataManagerIOS&) = delete;
- URLDataManagerIOS& operator=(const URLDataManagerIOS&) = delete;
- ~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_;
- };
- } // namespace web
- #endif // IOS_WEB_WEBUI_URL_DATA_MANAGER_IOS_H_
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