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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 #include "components/view_manager/event_dispatcher.h" | |
| 6 | |
| 7 #include "components/view_manager/server_view.h" | |
| 8 #include "components/view_manager/view_coordinate_conversions.h" | |
| 9 #include "components/view_manager/view_locator.h" | |
| 10 #include "components/view_manager/view_tree_host_impl.h" | |
| 11 #include "ui/gfx/geometry/point.h" | |
| 12 #include "ui/gfx/geometry/point_f.h" | |
| 13 | |
| 14 namespace view_manager { | |
| 15 | |
| 16 EventDispatcher::EventDispatcher(ViewTreeHostImpl* view_tree_host) | |
| 17 : view_tree_host_(view_tree_host) { | |
| 18 } | |
| 19 | |
| 20 EventDispatcher::~EventDispatcher() { | |
| 21 } | |
| 22 | |
| 23 void EventDispatcher::AddAccelerator(uint32_t id, | |
| 24 mojo::KeyboardCode keyboard_code, | |
| 25 mojo::EventFlags flags) { | |
| 26 #if !defined(NDEBUG) | |
| 27 for (const auto& pair : accelerators_) { | |
| 28 DCHECK(pair.first != id); | |
| 29 DCHECK(pair.second.keyboard_code != keyboard_code || | |
| 30 pair.second.flags != flags); | |
| 31 } | |
| 32 #endif | |
| 33 accelerators_.insert(Entry(id, Accelerator(keyboard_code, flags))); | |
| 34 } | |
| 35 | |
| 36 void EventDispatcher::RemoveAccelerator(uint32_t id) { | |
| 37 auto it = accelerators_.find(id); | |
| 38 DCHECK(it != accelerators_.end()); | |
| 39 accelerators_.erase(it); | |
| 40 } | |
| 41 | |
| 42 void EventDispatcher::OnEvent(mojo::EventPtr event) { | |
| 43 if (event->action == mojo::EVENT_TYPE_KEY_PRESSED && | |
| 44 !event->key_data->is_char) { | |
| 45 uint32_t accelerator = 0u; | |
| 46 if (FindAccelerator(*event, &accelerator)) { | |
| 47 view_tree_host_->OnAccelerator(accelerator, event.Pass()); | |
| 48 return; | |
| 49 } | |
| 50 } | |
| 51 | |
| 52 ServerView* target = FindEventTarget(event.get()); | |
| 53 if (target) { | |
| 54 // Update focus on pointer-down. | |
| 55 if (event->action == mojo::EVENT_TYPE_POINTER_DOWN) | |
| 56 view_tree_host_->SetFocusedView(target); | |
| 57 view_tree_host_->DispatchInputEventToView(target, event.Pass()); | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 bool EventDispatcher::FindAccelerator(const mojo::Event& event, | |
| 62 uint32_t* accelerator_id) { | |
| 63 DCHECK(event.key_data); | |
| 64 for (const auto& pair : accelerators_) { | |
| 65 if (pair.second.keyboard_code == event.key_data->windows_key_code && | |
| 66 pair.second.flags == event.flags) { | |
| 67 *accelerator_id = pair.first; | |
| 68 return true; | |
| 69 } | |
| 70 } | |
| 71 return false; | |
| 72 } | |
| 73 | |
| 74 ServerView* EventDispatcher::FindEventTarget(mojo::Event* event) { | |
| 75 ServerView* focused_view = view_tree_host_->GetFocusedView(); | |
| 76 if (event->pointer_data) { | |
| 77 ServerView* root = view_tree_host_->root_view(); | |
| 78 const gfx::Point root_point(static_cast<int>(event->pointer_data->x), | |
| 79 static_cast<int>(event->pointer_data->y)); | |
| 80 ServerView* target = focused_view; | |
| 81 if (event->action == mojo::EVENT_TYPE_POINTER_DOWN || !target || | |
| 82 !root->Contains(target)) { | |
| 83 target = FindDeepestVisibleView(root, root_point); | |
| 84 CHECK(target); | |
| 85 } | |
| 86 const gfx::PointF local_point(ConvertPointFBetweenViews( | |
| 87 root, target, | |
| 88 gfx::PointF(event->pointer_data->x, event->pointer_data->y))); | |
| 89 event->pointer_data->x = local_point.x(); | |
| 90 event->pointer_data->y = local_point.y(); | |
| 91 return target; | |
| 92 } | |
| 93 | |
| 94 return focused_view; | |
| 95 } | |
| 96 | |
| 97 } // namespace view_manager | |
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