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1 // Copyright 2017 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 "ash/wm/overview/overview_window_drag_controller.h" | |
6 | |
7 #include "ash/screen_util.h" | |
8 #include "ash/shell.h" | |
9 #include "ash/wm/overview/scoped_transform_overview_window.h" | |
10 #include "ash/wm/overview/window_selector.h" | |
11 #include "ash/wm/overview/window_selector_item.h" | |
12 #include "ash/wm/splitview/split_view_controller.h" | |
13 #include "ash/wm/window_positioning_utils.h" | |
14 #include "ash/wm/window_state.h" | |
15 #include "ash/wm/wm_event.h" | |
16 #include "ash/wm/workspace/phantom_window_controller.h" | |
17 #include "ui/aura/window.h" | |
18 #include "ui/wm/core/coordinate_conversion.h" | |
19 | |
20 namespace ash { | |
21 | |
22 namespace { | |
23 | |
24 // The minimum offset that will be considered as a drag event. | |
25 const int kMinimiumDragOffset = 5; | |
26 | |
27 // Snapping distance between the dragged window with the screen edge. It's | |
28 // useful especially for touch events. | |
29 const int kScreenEdgeInsetForDrag = 200; | |
30 | |
31 } // namespace | |
32 | |
33 OverviewWindowDragController::OverviewWindowDragController( | |
34 WindowSelector* window_selector) | |
35 : window_selector_(window_selector), | |
36 split_view_controller_(Shell::Get()->split_view_controller()) {} | |
37 | |
38 OverviewWindowDragController::~OverviewWindowDragController() {} | |
39 | |
40 void OverviewWindowDragController::InitiateDrag( | |
41 WindowSelectorItem* item, | |
42 const gfx::Point& location_in_screen) { | |
43 initial_event_location_ = location_in_screen; | |
44 previous_event_location_ = location_in_screen; | |
45 item_ = item; | |
46 } | |
47 | |
48 void OverviewWindowDragController::Drag(WindowSelectorItem* item, | |
49 const gfx::Point& location_in_screen) { | |
50 DCHECK_EQ(item_, item); | |
51 | |
52 if (!did_move_ && | |
53 (std::abs(location_in_screen.x() - initial_event_location_.x()) < | |
54 kMinimiumDragOffset || | |
55 std::abs(location_in_screen.y() - initial_event_location_.y()) < | |
56 kMinimiumDragOffset)) { | |
57 return; | |
58 } | |
59 did_move_ = true; | |
60 | |
61 // Updates the dragged |item_|'s board accordingly. | |
62 gfx::Rect bounds(item_->target_bounds()); | |
63 bounds.Offset(location_in_screen.x() - previous_event_location_.x(), | |
64 location_in_screen.y() - previous_event_location_.y()); | |
65 item_->SetBounds(bounds, OverviewAnimationType::OVERVIEW_ANIMATION_NONE); | |
66 previous_event_location_ = location_in_screen; | |
67 | |
68 // Then updates the phantom window if applicable. | |
69 UpdatePhantomWindow(location_in_screen); | |
70 } | |
71 | |
72 void OverviewWindowDragController::CompleteDrag(WindowSelectorItem* item) { | |
73 DCHECK_EQ(item_, item); | |
74 | |
75 phantom_window_controller_.reset(); | |
76 | |
77 if (!did_move_) { | |
78 // If no drag was initiated (e.g., a click/tap on the overview window), | |
79 // activate the window. If the split view is active and has a left window, | |
80 // snap the current window to right. If the split view is active and has a | |
81 // right window, snap the current window to left. | |
82 SplitViewController::State split_state = split_view_controller_->state(); | |
83 if (split_state == SplitViewController::NOSNAP) | |
84 window_selector_->SelectWindow(item); | |
85 else if (split_state == SplitViewController::LEFT_SNAPPED) | |
86 SnapToRight(); | |
87 else if (split_state == SplitViewController::RIGHT_SNAPPED) | |
88 SnapToLeft(); | |
89 } else { | |
90 // If the window was dragged around but should not be snapped, move it back | |
91 // to overview window grid. | |
92 if (snap_type_ == SNAP_NONE) | |
93 window_selector_->PositionWindows(true /* animate */); | |
94 else if (snap_type_ == SNAP_LEFT) | |
95 SnapToLeft(); | |
96 else | |
97 SnapToRight(); | |
98 did_move_ = false; | |
99 } | |
100 } | |
101 | |
102 void OverviewWindowDragController::UpdatePhantomWindow( | |
103 const gfx::Point& location_in_screen) { | |
104 SnapType last_snap_type = snap_type_; | |
105 snap_type_ = GetSnapType(location_in_screen); | |
106 if (snap_type_ == SNAP_NONE || snap_type_ != last_snap_type) { | |
107 phantom_window_controller_.reset(); | |
108 if (snap_type_ == SNAP_NONE) | |
109 return; | |
110 } | |
111 | |
112 const bool can_snap = snap_type_ != SNAP_NONE && | |
113 wm::GetWindowState(item_->GetWindow())->CanSnap(); | |
114 if (!can_snap) { | |
115 snap_type_ = SNAP_NONE; | |
116 phantom_window_controller_.reset(); | |
117 return; | |
118 } | |
119 | |
120 aura::Window* target_window = item_->GetWindow(); | |
121 gfx::Rect phantom_bounds_in_screen = | |
122 (snap_type_ == SNAP_LEFT) | |
123 ? Shell::Get() | |
124 ->split_view_controller() | |
125 ->GetSnappedWindowBoundsInScreen( | |
126 target_window, SplitViewController::LEFT_SNAPPED) | |
127 : Shell::Get() | |
128 ->split_view_controller() | |
129 ->GetSnappedWindowBoundsInScreen( | |
130 target_window, SplitViewController::RIGHT_SNAPPED); | |
oshima
2017/06/16 01:20:57
snap_type == LEFT ? SplitViewController::LEFT_SNAP
xdai1
2017/06/16 18:49:52
Done. I think use two enum might be better here si
| |
131 | |
132 if (!phantom_window_controller_) { | |
133 phantom_window_controller_ = | |
134 base::MakeUnique<PhantomWindowController>(target_window); | |
135 } | |
136 phantom_window_controller_->Show(phantom_bounds_in_screen); | |
137 } | |
138 | |
139 OverviewWindowDragController::SnapType | |
140 OverviewWindowDragController::GetSnapType( | |
141 const gfx::Point& location_in_screen) { | |
142 gfx::Rect area( | |
143 ScreenUtil::GetDisplayWorkAreaBoundsInParent(item_->GetWindow())); | |
144 ::wm::ConvertRectToScreen(item_->GetWindow()->GetRootWindow(), &area); | |
145 area.Inset(kScreenEdgeInsetForDrag, 0, kScreenEdgeInsetForDrag, 0); | |
146 | |
147 if (location_in_screen.x() <= area.x()) | |
148 return SNAP_LEFT; | |
149 if (location_in_screen.x() >= area.right() - 1) | |
150 return SNAP_RIGHT; | |
151 return SNAP_NONE; | |
152 } | |
153 | |
154 void OverviewWindowDragController::SnapToLeft() { | |
155 item_->EnsureVisible(); | |
156 item_->RestoreWindow(); | |
157 | |
158 // |item_| will be deleted after RemoveWindowSelectorItem(). | |
159 aura::Window* left_window = item_->GetWindow(); | |
160 window_selector_->RemoveWindowSelectorItem(item_); | |
161 split_view_controller_->SetLeftWindow(left_window); | |
162 item_ = nullptr; | |
163 } | |
164 | |
165 void OverviewWindowDragController::SnapToRight() { | |
166 item_->EnsureVisible(); | |
167 item_->RestoreWindow(); | |
168 | |
169 // |item_| will be deleted after RemoveWindowSelectorItem(). | |
170 aura::Window* right_window = item_->GetWindow(); | |
171 window_selector_->RemoveWindowSelectorItem(item_); | |
172 split_view_controller_->SetRightWindow(right_window); | |
173 item_ = nullptr; | |
174 } | |
175 | |
176 } // namespace ash | |
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