1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/wm/solo_window_tracker.h"
#include <algorithm>
#include "ash/ash_constants.h"
#include "ash/root_window_controller.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "ash/wm/window_state.h"
#include "ash/wm/window_state_observer.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
namespace ash {
namespace {
// A flag to enable/disable the solo window header across all root windows.
bool g_solo_header_enabled = true;
// Returns the containers from which a solo window is chosen.
std::vector<aura::Window*> GetContainers(aura::RootWindow* root_window) {
int kContainerIds[] = {
internal::kShellWindowId_DefaultContainer,
internal::kShellWindowId_AlwaysOnTopContainer,
// Docked windows never use the solo header, but regular windows move to the
// docked container when dragged.
internal::kShellWindowId_DockedContainer,
};
std::vector<aura::Window*> containers;
for (size_t i = 0; i < arraysize(kContainerIds); ++i) {
containers.push_back(
Shell::GetContainer(root_window->window(), kContainerIds[i]));
}
return containers;
}
// Returns true if |child| and all of its ancestors are visible and neither
// |child| nor any its ancestors is animating hidden.
bool GetTargetVisibility(aura::Window* child) {
for (aura::Window* window = child; window; window = window->parent()) {
if (!window->TargetVisibility())
return false;
}
return true;
}
// Returns true if |window| can use the solo window header. Returns false for
// windows that are:
// * Not drawn (for example, DragDropTracker uses one for mouse capture)
// * Modal alerts (it looks odd for headers to change when an alert opens)
// * Constrained windows (ditto)
bool IsValidCandidate(aura::Window* window) {
return window->type() == aura::client::WINDOW_TYPE_NORMAL &&
window->layer() &&
window->layer()->type() != ui::LAYER_NOT_DRAWN &&
window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_NONE &&
!window->GetProperty(aura::client::kConstrainedWindowKey);
}
// Schedule's a paint of the window's entire bounds.
void SchedulePaint(aura::Window* window) {
window->SchedulePaintInRect(gfx::Rect(window->bounds().size()));
}
} // namespace
// Class which triggers a repaint of the window which is passed to the
// constructor whenever the window's show type changes. The window's non client
// view is responsible for updating whether it uses the solo header as part of
// the repaint by querying GetWindowWithSoloHeader().
class SoloWindowTracker::SoloWindowObserver
: public ash::wm::WindowStateObserver {
public:
explicit SoloWindowObserver(aura::Window* window) : window_(window) {
wm::GetWindowState(window_)->AddObserver(this);
}
virtual ~SoloWindowObserver() {
wm::GetWindowState(window_)->RemoveObserver(this);
}
private:
// ash::wm::WindowStateObserver override.
virtual void OnWindowShowTypeChanged(
ash::wm::WindowState* window_state,
ash::wm::WindowShowType old_type) OVERRIDE {
SchedulePaint(window_);
}
aura::Window* window_;
DISALLOW_COPY_AND_ASSIGN(SoloWindowObserver);
};
SoloWindowTracker::SoloWindowTracker(aura::RootWindow* root_window)
: containers_(GetContainers(root_window)),
solo_window_(NULL) {
for (size_t i = 0; i < containers_.size(); ++i)
containers_[i]->AddObserver(this);
}
SoloWindowTracker::~SoloWindowTracker() {
for (size_t i = 0; i < containers_.size(); ++i)
containers_[i]->RemoveObserver(this);
}
// static
void SoloWindowTracker::SetSoloHeaderEnabled(bool enabled) {
g_solo_header_enabled = enabled;
std::vector<aura::Window*> root_windows =
Shell::GetInstance()->GetAllRootWindows();
for (size_t i = 0; i < root_windows.size(); ++i) {
SoloWindowTracker* tracker =
internal::GetRootWindowController(root_windows[i])->
solo_window_tracker();
if (tracker)
tracker->UpdateSoloWindow(NULL);
}
}
aura::Window* SoloWindowTracker::GetWindowWithSoloHeader() {
bool use_solo_header = solo_window_ &&
!wm::GetWindowState(solo_window_)->IsMaximizedOrFullscreen();
return use_solo_header ? solo_window_ : NULL;
}
void SoloWindowTracker::UpdateSoloWindow(aura::Window* ignore_window) {
std::vector<aura::Window*> candidates;
// Avoid memory allocations for typical window counts.
candidates.reserve(16);
for (size_t i = 0; i < containers_.size(); ++i) {
candidates.insert(candidates.end(),
containers_[i]->children().begin(),
containers_[i]->children().end());
}
aura::Window* old_solo_window = solo_window_;
solo_window_ = NULL;
if (g_solo_header_enabled && !AnyVisibleWindowDocked()) {
for (size_t i = 0; i < candidates.size(); ++i) {
aura::Window* candidate = candidates[i];
// Various sorts of windows "don't count" for this computation.
if (candidate == ignore_window ||
!IsValidCandidate(candidate) ||
!GetTargetVisibility(candidate)) {
continue;
}
if (solo_window_) {
// A window can only use the solo header if it is the only visible valid
// candidate (and there are no visible docked windows).
solo_window_ = NULL;
break;
} else {
solo_window_ = candidate;
}
}
}
if (solo_window_ == old_solo_window)
return;
solo_window_observer_.reset(solo_window_ ?
new SoloWindowObserver(solo_window_) : NULL);
if (old_solo_window)
SchedulePaint(old_solo_window);
if (solo_window_)
SchedulePaint(solo_window_);
}
bool SoloWindowTracker::AnyVisibleWindowDocked() const {
// For the purpose of SoloWindowTracker, there is a visible docked window if
// it causes the dock to have non-empty bounds. This is intentionally
// different from:
// DockedWindowLayoutManager::IsAnyWindowDocked() and
// DockedWindowLayoutManager::is_dragged_window_docked().
return !dock_bounds_.IsEmpty();
}
void SoloWindowTracker::OnWindowAdded(aura::Window* new_window) {
UpdateSoloWindow(NULL);
}
void SoloWindowTracker::OnWillRemoveWindow(aura::Window* window) {
UpdateSoloWindow(window);
}
void SoloWindowTracker::OnWindowVisibilityChanged(aura::Window* window,
bool visible) {
// |window| may be a grandchild of |containers_|.
std::vector<aura::Window*>::const_iterator it = std::find(
containers_.begin(), containers_.end(), window->parent());
if (it != containers_.end())
UpdateSoloWindow(NULL);
}
void SoloWindowTracker::OnDockBoundsChanging(const gfx::Rect& new_bounds,
Reason reason) {
dock_bounds_ = new_bounds;
UpdateSoloWindow(NULL);
}
} // namespace ash
|
