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1 // Copyright (c) 2011 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 "ui/aura_shell/root_window_event_filter.h" | |
6 | |
7 #include "ash/wm/activation_controller.h" | |
8 #include "ui/aura/event.h" | |
9 #include "ui/aura/focus_manager.h" | |
10 #include "ui/aura/root_window.h" | |
11 #include "ui/aura/window_delegate.h" | |
12 #include "ui/aura_shell/shell.h" | |
13 #include "ui/aura_shell/window_util.h" | |
14 #include "ui/base/hit_test.h" | |
15 | |
16 namespace aura_shell { | |
17 namespace internal { | |
18 | |
19 // Returns the default cursor for a window component. | |
20 gfx::NativeCursor CursorForWindowComponent(int window_component) { | |
21 switch (window_component) { | |
22 case HTBOTTOM: | |
23 return aura::kCursorSouthResize; | |
24 case HTBOTTOMLEFT: | |
25 return aura::kCursorSouthWestResize; | |
26 case HTBOTTOMRIGHT: | |
27 return aura::kCursorSouthEastResize; | |
28 case HTLEFT: | |
29 return aura::kCursorWestResize; | |
30 case HTRIGHT: | |
31 return aura::kCursorEastResize; | |
32 case HTTOP: | |
33 return aura::kCursorNorthResize; | |
34 case HTTOPLEFT: | |
35 return aura::kCursorNorthWestResize; | |
36 case HTTOPRIGHT: | |
37 return aura::kCursorNorthEastResize; | |
38 default: | |
39 return aura::kCursorNull; | |
40 } | |
41 } | |
42 | |
43 //////////////////////////////////////////////////////////////////////////////// | |
44 // RootWindowEventFilter, public: | |
45 | |
46 RootWindowEventFilter::RootWindowEventFilter() | |
47 : EventFilter(aura::RootWindow::GetInstance()) { | |
48 } | |
49 | |
50 RootWindowEventFilter::~RootWindowEventFilter() { | |
51 // Additional filters are not owned by RootWindowEventFilter and they | |
52 // should all be removed when running here. |filters_| has | |
53 // check_empty == true and will DCHECK failure if it is not empty. | |
54 } | |
55 | |
56 void RootWindowEventFilter::AddFilter(aura::EventFilter* filter) { | |
57 filters_.AddObserver(filter); | |
58 } | |
59 | |
60 void RootWindowEventFilter::RemoveFilter(aura::EventFilter* filter) { | |
61 filters_.RemoveObserver(filter); | |
62 } | |
63 | |
64 //////////////////////////////////////////////////////////////////////////////// | |
65 // RootWindowEventFilter, EventFilter implementation: | |
66 | |
67 bool RootWindowEventFilter::PreHandleKeyEvent(aura::Window* target, | |
68 aura::KeyEvent* event) { | |
69 return FilterKeyEvent(target, event); | |
70 } | |
71 | |
72 bool RootWindowEventFilter::PreHandleMouseEvent(aura::Window* target, | |
73 aura::MouseEvent* event) { | |
74 // We must always update the cursor, otherwise the cursor can get stuck if an | |
75 // event filter registered with us consumes the event. | |
76 if (event->type() == ui::ET_MOUSE_MOVED) { | |
77 // Shows the cursor when mouse moved. | |
78 SetCursorVisible(target, event, true); | |
79 | |
80 UpdateCursor(target, event); | |
81 } | |
82 | |
83 if (FilterMouseEvent(target, event)) | |
84 return true; | |
85 | |
86 if (event->type() == ui::ET_MOUSE_PRESSED) | |
87 target->GetFocusManager()->SetFocusedWindow(target); | |
88 | |
89 return false; | |
90 } | |
91 | |
92 ui::TouchStatus RootWindowEventFilter::PreHandleTouchEvent( | |
93 aura::Window* target, | |
94 aura::TouchEvent* event) { | |
95 ui::TouchStatus status = FilterTouchEvent(target, event); | |
96 if (status != ui::TOUCH_STATUS_UNKNOWN) | |
97 return status; | |
98 | |
99 if (event->type() == ui::ET_TOUCH_PRESSED) { | |
100 // Hides the cursor when touch pressed. | |
101 SetCursorVisible(target, event, false); | |
102 | |
103 target->GetFocusManager()->SetFocusedWindow(target); | |
104 } | |
105 return ui::TOUCH_STATUS_UNKNOWN; | |
106 } | |
107 | |
108 //////////////////////////////////////////////////////////////////////////////// | |
109 // RootWindowEventFilter, private: | |
110 | |
111 void RootWindowEventFilter::UpdateCursor(aura::Window* target, | |
112 aura::MouseEvent* event) { | |
113 gfx::NativeCursor cursor = target->GetCursor(event->location()); | |
114 if (event->flags() & ui::EF_IS_NON_CLIENT) { | |
115 int window_component = | |
116 target->delegate()->GetNonClientComponent(event->location()); | |
117 cursor = CursorForWindowComponent(window_component); | |
118 } | |
119 aura::RootWindow::GetInstance()->SetCursor(cursor); | |
120 } | |
121 | |
122 void RootWindowEventFilter::SetCursorVisible(aura::Window* target, | |
123 aura::LocatedEvent* event, | |
124 bool show) { | |
125 aura::RootWindow::GetInstance()->ShowCursor(show); | |
126 } | |
127 | |
128 bool RootWindowEventFilter::FilterKeyEvent(aura::Window* target, | |
129 aura::KeyEvent* event) { | |
130 bool handled = false; | |
131 if (filters_.might_have_observers()) { | |
132 ObserverListBase<aura::EventFilter>::Iterator it(filters_); | |
133 aura::EventFilter* filter; | |
134 while (!handled && (filter = it.GetNext()) != NULL) | |
135 handled = filter->PreHandleKeyEvent(target, event); | |
136 } | |
137 return handled; | |
138 } | |
139 | |
140 bool RootWindowEventFilter::FilterMouseEvent(aura::Window* target, | |
141 aura::MouseEvent* event) { | |
142 bool handled = false; | |
143 if (filters_.might_have_observers()) { | |
144 ObserverListBase<aura::EventFilter>::Iterator it(filters_); | |
145 aura::EventFilter* filter; | |
146 while (!handled && (filter = it.GetNext()) != NULL) | |
147 handled = filter->PreHandleMouseEvent(target, event); | |
148 } | |
149 return handled; | |
150 } | |
151 | |
152 ui::TouchStatus RootWindowEventFilter::FilterTouchEvent( | |
153 aura::Window* target, | |
154 aura::TouchEvent* event) { | |
155 ui::TouchStatus status = ui::TOUCH_STATUS_UNKNOWN; | |
156 if (filters_.might_have_observers()) { | |
157 ObserverListBase<aura::EventFilter>::Iterator it(filters_); | |
158 aura::EventFilter* filter; | |
159 while (status == ui::TOUCH_STATUS_UNKNOWN && | |
160 (filter = it.GetNext()) != NULL) { | |
161 status = filter->PreHandleTouchEvent(target, event); | |
162 } | |
163 } | |
164 return status; | |
165 } | |
166 | |
167 } // namespace internal | |
168 } // namespace aura_shell | |
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