| // 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. |
| |
| #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_SELECTION_CONTROLLER_CLIENT_MANAGER_H_ |
| #define CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_SELECTION_CONTROLLER_CLIENT_MANAGER_H_ |
| |
| #include "base/observer_list_types.h" |
| #include "content/common/content_export.h" |
| |
| namespace gfx { |
| class SelectionBound; |
| } |
| |
| namespace ui { |
| class TouchSelectionController; |
| class TouchSelectionControllerClient; |
| class TouchSelectionMenuClient; |
| } // namespace ui |
| |
| namespace content { |
| |
| // This class defines an interface for a manager class that allows multiple |
| // TouchSelectionControllerClients to work together with a single |
| // TouchSelectionController. |
| class CONTENT_EXPORT TouchSelectionControllerClientManager { |
| public: |
| virtual ~TouchSelectionControllerClientManager() {} |
| |
| virtual void DidStopFlinging() = 0; |
| |
| // The manager uses this class' methods to notify observers about important |
| // events. |
| class CONTENT_EXPORT Observer : public base::CheckedObserver { |
| public: |
| // Warns observers the manager is shutting down. The manager's view may not |
| // be rigidly defined with respect to the lifetime of the client's views. |
| virtual void OnManagerWillDestroy( |
| TouchSelectionControllerClientManager* manager) = 0; |
| }; |
| |
| // Clients call this method when their selection bounds change, so that the |
| // manager can determine which client should be considered the active client, |
| // i.e. receive the selection handles and (possibly) a quickmenu. |
| virtual void UpdateClientSelectionBounds( |
| const gfx::SelectionBound& start, |
| const gfx::SelectionBound& end, |
| ui::TouchSelectionControllerClient* client, |
| ui::TouchSelectionMenuClient* menu_client) = 0; |
| |
| // Used by clients to inform the manager that the client no longer wants to |
| // participate in touch selection editing, usually because the client's view |
| // is being destroyed or detached. |
| virtual void InvalidateClient(ui::TouchSelectionControllerClient* client) = 0; |
| |
| // Provides direct access to the TouchSelectionController that will be used |
| // with all clients accessing this manager. May return null values on Android. |
| virtual ui::TouchSelectionController* GetTouchSelectionController() = 0; |
| |
| // The following two functions allow clients (or their owners, etc.) to |
| // monitor the manager's lifetime. |
| virtual void AddObserver(Observer* observer) = 0; |
| virtual void RemoveObserver(Observer* observer) = 0; |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_SELECTION_CONTROLLER_CLIENT_MANAGER_H_ |