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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef COMPONENTS_VIEW_MANAGER_EVENT_DISPATCHER_H_ | |
| 6 #define COMPONENTS_VIEW_MANAGER_EVENT_DISPATCHER_H_ | |
| 7 | |
| 8 #include <map> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "ui/mojo/events/input_event_constants.mojom.h" | |
| 12 #include "ui/mojo/events/input_events.mojom.h" | |
| 13 #include "ui/mojo/events/input_key_codes.mojom.h" | |
| 14 | |
| 15 namespace view_manager { | |
| 16 | |
| 17 class ServerView; | |
| 18 class ViewTreeHostImpl; | |
| 19 | |
| 20 // Handles dispatching events to the right location as well as updating focus. | |
| 21 class EventDispatcher { | |
| 22 public: | |
| 23 explicit EventDispatcher(ViewTreeHostImpl* view_tree_host); | |
| 24 ~EventDispatcher(); | |
| 25 | |
| 26 void AddAccelerator(uint32_t id, | |
| 27 mojo::KeyboardCode keyboard_code, | |
| 28 mojo::EventFlags flags); | |
| 29 void RemoveAccelerator(uint32_t id); | |
| 30 | |
| 31 void OnEvent(mojo::EventPtr event); | |
| 32 | |
| 33 private: | |
| 34 struct Accelerator { | |
| 35 Accelerator(mojo::KeyboardCode keyboard_code, mojo::EventFlags flags) | |
| 36 : keyboard_code(keyboard_code), flags(flags) {} | |
| 37 | |
| 38 // So we can use this in a set. | |
| 39 bool operator<(const Accelerator& other) const { | |
| 40 if (keyboard_code == other.keyboard_code) | |
| 41 return flags < other.flags; | |
| 42 return keyboard_code < other.keyboard_code; | |
| 43 } | |
| 44 | |
| 45 mojo::KeyboardCode keyboard_code; | |
| 46 mojo::EventFlags flags; | |
| 47 }; | |
| 48 | |
| 49 // Looks to see if there is an accelerator bound to the specified code/flags. | |
| 50 // If there is one, sets |accelerator_id| to the id of the accelerator invoked | |
| 51 // and returns true. If there is none, returns false so normal key event | |
| 52 // processing can continue. | |
| 53 bool FindAccelerator(const mojo::Event& event, uint32_t* accelerator_id); | |
| 54 | |
| 55 // Returns the ServerView that should receive |event|. If |event| is a | |
| 56 // pointer-type event, then this function also updates the event location to | |
| 57 // make sure it is in the returned target's coordinate space. | |
| 58 ServerView* FindEventTarget(mojo::Event* event); | |
| 59 | |
| 60 ViewTreeHostImpl* view_tree_host_; | |
| 61 | |
| 62 using Entry = std::pair<uint32_t, Accelerator>; | |
| 63 std::map<uint32_t, Accelerator> accelerators_; | |
| 64 | |
| 65 DISALLOW_COPY_AND_ASSIGN(EventDispatcher); | |
| 66 }; | |
| 67 | |
| 68 } // namespace view_manager | |
| 69 | |
| 70 #endif // COMPONENTS_VIEW_MANAGER_EVENT_DISPATCHER_H_ | |
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