mirror_window_controller.cc revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
1// Copyright (c) 2013 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/display/mirror_window_controller.h"
6
7#if defined(USE_X11)
8#include <X11/Xlib.h>
9
10// Xlib.h defines RootWindow.
11#undef RootWindow
12#endif
13
14#include "ash/display/cursor_window_controller.h"
15#include "ash/display/display_controller.h"
16#include "ash/display/display_info.h"
17#include "ash/display/display_manager.h"
18#include "ash/display/root_window_transformers.h"
19#include "ash/host/window_tree_host_factory.h"
20#include "ash/root_window_settings.h"
21#include "ash/shell.h"
22#include "base/strings/stringprintf.h"
23#include "ui/aura/client/capture_client.h"
24#include "ui/aura/root_window_transformer.h"
25#include "ui/aura/window_delegate.h"
26#include "ui/aura/window_event_dispatcher.h"
27#include "ui/base/layout.h"
28#include "ui/compositor/reflector.h"
29#include "ui/gfx/canvas.h"
30#include "ui/gfx/native_widget_types.h"
31
32#if defined(USE_X11)
33#include "ui/gfx/x/x11_types.h"
34#endif
35
36namespace ash {
37namespace internal {
38namespace {
39
40#if defined(USE_X11)
41// Mirror window shouldn't handle input events.
42void DisableInput(XID window) {
43  long event_mask = ExposureMask | VisibilityChangeMask |
44      StructureNotifyMask | PropertyChangeMask;
45  XSelectInput(gfx::GetXDisplay(), window, event_mask);
46}
47#endif
48
49class NoneCaptureClient : public aura::client::CaptureClient {
50 public:
51  NoneCaptureClient() {}
52  virtual ~NoneCaptureClient() {}
53
54 private:
55  // Does a capture on the |window|.
56  virtual void SetCapture(aura::Window* window) OVERRIDE {}
57
58  // Releases a capture from the |window|.
59  virtual void ReleaseCapture(aura::Window* window) OVERRIDE {}
60
61  // Returns the current capture window.
62  virtual aura::Window* GetCaptureWindow() OVERRIDE {
63    return NULL;
64  }
65  virtual aura::Window* GetGlobalCaptureWindow() OVERRIDE {
66    return NULL;
67  }
68
69  DISALLOW_COPY_AND_ASSIGN(NoneCaptureClient);
70};
71
72}  // namespace
73
74MirrorWindowController::MirrorWindowController() {}
75
76MirrorWindowController::~MirrorWindowController() {
77  // Make sure the root window gets deleted before cursor_window_delegate.
78  Close();
79}
80
81void MirrorWindowController::UpdateWindow(const DisplayInfo& display_info) {
82  static int mirror_host_count = 0;
83
84  if (!host_.get()) {
85    const gfx::Rect& bounds_in_native = display_info.bounds_in_native();
86    host_.reset(Shell::GetInstance()->window_tree_host_factory()->
87        CreateWindowTreeHost(bounds_in_native));
88    host_->window()->SetName(
89        base::StringPrintf("MirrorRootWindow-%d", mirror_host_count++));
90    host_->compositor()->SetBackgroundColor(SK_ColorBLACK);
91    // No need to remove the observer because the DisplayController outlives the
92    // host.
93    host_->AddObserver(Shell::GetInstance()->display_controller());
94    host_->AddObserver(this);
95    // TODO(oshima): TouchHUD is using idkey.
96    InitRootWindowSettings(host_->window())->display_id = display_info.id();
97    host_->InitHost();
98#if defined(USE_X11)
99    DisableInput(host_->GetAcceleratedWidget());
100#endif
101
102    aura::client::SetCaptureClient(host_->window(), new NoneCaptureClient());
103    host_->Show();
104
105    // TODO(oshima): Start mirroring.
106    aura::Window* mirror_window = new aura::Window(NULL);
107    mirror_window->Init(aura::WINDOW_LAYER_TEXTURED);
108    host_->window()->AddChild(mirror_window);
109    mirror_window->SetBounds(host_->window()->bounds());
110    mirror_window->Show();
111    reflector_ = ui::ContextFactory::GetInstance()->CreateReflector(
112        Shell::GetPrimaryRootWindow()->GetHost()->compositor(),
113        mirror_window->layer());
114  } else {
115    GetRootWindowSettings(host_->window())->display_id = display_info.id();
116    host_->SetBounds(display_info.bounds_in_native());
117  }
118
119  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
120  const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
121      Shell::GetScreen()->GetPrimaryDisplay().id());
122  DCHECK(display_manager->IsMirrored());
123  scoped_ptr<aura::RootWindowTransformer> transformer(
124      internal::CreateRootWindowTransformerForMirroredDisplay(
125          source_display_info,
126          display_info));
127  host_->SetRootWindowTransformer(transformer.Pass());
128}
129
130void MirrorWindowController::UpdateWindow() {
131  if (host_.get()) {
132    DisplayManager* display_manager = Shell::GetInstance()->display_manager();
133    const DisplayInfo& mirror_display_info = display_manager->GetDisplayInfo(
134        display_manager->mirrored_display_id());
135    UpdateWindow(mirror_display_info);
136  }
137}
138
139void MirrorWindowController::Close() {
140  if (host_.get()) {
141    ui::ContextFactory::GetInstance()->RemoveReflector(reflector_);
142    reflector_ = NULL;
143    NoneCaptureClient* capture_client = static_cast<NoneCaptureClient*>(
144        aura::client::GetCaptureClient(host_->window()));
145    aura::client::SetCaptureClient(host_->window(), NULL);
146    delete capture_client;
147
148    host_->RemoveObserver(Shell::GetInstance()->display_controller());
149    host_->RemoveObserver(this);
150    host_.reset();
151  }
152}
153
154void MirrorWindowController::OnHostResized(const aura::WindowTreeHost* host) {
155  if (mirror_window_host_size_ == host->GetBounds().size())
156    return;
157  mirror_window_host_size_ = host->GetBounds().size();
158  reflector_->OnMirroringCompositorResized();
159  host_->SetRootWindowTransformer(CreateRootWindowTransformer().Pass());
160  Shell::GetInstance()->display_controller()->cursor_window_controller()->
161      UpdateLocation();
162}
163
164
165scoped_ptr<aura::RootWindowTransformer>
166MirrorWindowController::CreateRootWindowTransformer() const {
167  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
168  const DisplayInfo& mirror_display_info = display_manager->GetDisplayInfo(
169      display_manager->mirrored_display_id());
170  const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
171      Shell::GetScreen()->GetPrimaryDisplay().id());
172  DCHECK(display_manager->IsMirrored());
173  return scoped_ptr<aura::RootWindowTransformer>(
174      internal::CreateRootWindowTransformerForMirroredDisplay(
175          source_display_info,
176          mirror_display_info));
177}
178
179}  // namespace internal
180}  // namespace ash
181