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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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