mirror_window_controller.cc revision d0247b1b59f9c528cb6df88b4f2b9afaf80d181e 
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/display_controller.h"
15#include "ash/display/display_info.h"
16#include "ash/display/display_manager.h"
17#include "ash/display/root_window_transformers.h"
18#include "ash/host/root_window_host_factory.h"
19#include "ash/root_window_settings.h"
20#include "ash/shell.h"
21#include "base/strings/stringprintf.h"
22#include "ui/aura/client/capture_client.h"
23#include "ui/aura/env.h"
24#include "ui/aura/root_window.h"
25#include "ui/aura/root_window_transformer.h"
26#include "ui/aura/window_delegate.h"
27#include "ui/base/cursor/cursors_aura.h"
28#include "ui/base/hit_test.h"
29#include "ui/base/layout.h"
30#include "ui/base/resource/resource_bundle.h"
31#include "ui/compositor/reflector.h"
32#include "ui/gfx/canvas.h"
33#include "ui/gfx/image/image_skia.h"
34#include "ui/gfx/image/image_skia_operations.h"
35#include "ui/gfx/native_widget_types.h"
36
37#if defined(USE_X11)
38#include "ui/base/x/x11_util.h"
39#endif
40
41namespace ash {
42namespace internal {
43namespace {
44
45#if defined(USE_X11)
46// Mirror window shouldn't handle input events.
47void DisableInput(XID window) {
48  long event_mask = ExposureMask | VisibilityChangeMask |
49      StructureNotifyMask | PropertyChangeMask;
50  XSelectInput(ui::GetXDisplay(), window, event_mask);
51}
52#endif
53
54class NoneCaptureClient : public aura::client::CaptureClient {
55 public:
56  NoneCaptureClient() {}
57  virtual ~NoneCaptureClient() {}
58
59 private:
60  // Does a capture on the |window|.
61  virtual void SetCapture(aura::Window* window) OVERRIDE {}
62
63  // Releases a capture from the |window|.
64  virtual void ReleaseCapture(aura::Window* window) OVERRIDE {}
65
66  // Returns the current capture window.
67  virtual aura::Window* GetCaptureWindow() OVERRIDE {
68    return NULL;
69  }
70
71  DISALLOW_COPY_AND_ASSIGN(NoneCaptureClient);
72};
73
74}  // namespace
75
76class CursorWindowDelegate : public aura::WindowDelegate {
77 public:
78  CursorWindowDelegate() {}
79  virtual ~CursorWindowDelegate() {}
80
81  // aura::WindowDelegate overrides:
82  virtual gfx::Size GetMinimumSize() const OVERRIDE {
83    return size_;
84  }
85  virtual gfx::Size GetMaximumSize() const OVERRIDE {
86    return size_;
87  }
88  virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
89                               const gfx::Rect& new_bounds) OVERRIDE {
90  }
91  virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
92    return gfx::kNullCursor;
93  }
94  virtual int GetNonClientComponent(
95      const gfx::Point& point) const OVERRIDE {
96    return HTNOWHERE;
97  }
98  virtual bool ShouldDescendIntoChildForEventHandling(
99      aura::Window* child,
100      const gfx::Point& location) OVERRIDE {
101    return false;
102  }
103  virtual bool CanFocus() OVERRIDE {
104    return false;
105  }
106  virtual void OnCaptureLost() OVERRIDE {
107  }
108  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
109    canvas->DrawImageInt(cursor_image_, 0, 0);
110  }
111  virtual void OnDeviceScaleFactorChanged(
112      float device_scale_factor) OVERRIDE {
113  }
114  virtual void OnWindowDestroying() OVERRIDE {}
115  virtual void OnWindowDestroyed() OVERRIDE {}
116  virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {
117  }
118  virtual bool HasHitTestMask() const OVERRIDE {
119    return false;
120  }
121  virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}
122  virtual void DidRecreateLayer(ui::Layer* old_layer,
123                                ui::Layer* new_layer) OVERRIDE {}
124
125  // Set the cursor image for the |display|'s scale factor.  Note that
126  // mirror window's scale factor is always 1.0f, therefore we need to
127  // take 2x's image and paint as if it's 1x image.
128  void SetCursorImage(const gfx::ImageSkia& image,
129                      const gfx::Display& display) {
130    device_scale_factor_ =
131        ui::GetScaleFactorFromScale(display.device_scale_factor());
132    const gfx::ImageSkiaRep& image_rep =
133        image.GetRepresentation(device_scale_factor_);
134    size_ = image_rep.pixel_size();
135    cursor_image_ = gfx::ImageSkia::CreateFrom1xBitmap(image_rep.sk_bitmap());
136  }
137
138  const gfx::Size size() const { return size_; }
139
140 private:
141  gfx::ImageSkia cursor_image_;
142  ui::ScaleFactor device_scale_factor_;
143  gfx::Size size_;
144
145  DISALLOW_COPY_AND_ASSIGN(CursorWindowDelegate);
146};
147
148MirrorWindowController::MirrorWindowController()
149    : current_cursor_type_(ui::kCursorNone),
150      current_cursor_rotation_(gfx::Display::ROTATE_0),
151      cursor_window_(NULL),
152      cursor_window_delegate_(new CursorWindowDelegate) {
153}
154
155MirrorWindowController::~MirrorWindowController() {
156  // Make sure the root window gets deleted before cursor_window_delegate.
157  Close();
158}
159
160void MirrorWindowController::UpdateWindow(const DisplayInfo& display_info) {
161  static int mirror_root_window_count = 0;
162
163  if (!root_window_.get()) {
164    const gfx::Rect& bounds_in_pixel = display_info.bounds_in_pixel();
165    aura::RootWindow::CreateParams params(bounds_in_pixel);
166    params.host = Shell::GetInstance()->root_window_host_factory()->
167        CreateRootWindowHost(bounds_in_pixel);
168    root_window_.reset(new aura::RootWindow(params));
169    root_window_->SetName(
170        base::StringPrintf("MirrorRootWindow-%d", mirror_root_window_count++));
171    root_window_->compositor()->SetBackgroundColor(SK_ColorBLACK);
172    // No need to remove RootWindowObserver because
173    // the DisplayController object outlives RootWindow objects.
174    root_window_->AddRootWindowObserver(
175        Shell::GetInstance()->display_controller());
176    root_window_->AddRootWindowObserver(this);
177    // TODO(oshima): TouchHUD is using idkey.
178    InitRootWindowSettings(root_window_.get())->display_id = display_info.id();
179    root_window_->Init();
180#if defined(USE_X11)
181    DisableInput(root_window_->GetAcceleratedWidget());
182#endif
183
184    aura::client::SetCaptureClient(root_window_.get(), new NoneCaptureClient());
185    root_window_->ShowRootWindow();
186
187    // TODO(oshima): Start mirroring.
188    aura::Window* mirror_window = new aura::Window(NULL);
189    mirror_window->Init(ui::LAYER_TEXTURED);
190    root_window_->AddChild(mirror_window);
191    mirror_window->SetBounds(root_window_->bounds());
192    mirror_window->Show();
193    reflector_ = ui::ContextFactory::GetInstance()->
194        CreateReflector(Shell::GetPrimaryRootWindow()->compositor(),
195                        mirror_window->layer());
196
197    cursor_window_ = new aura::Window(cursor_window_delegate_.get());
198    cursor_window_->SetTransparent(true);
199    cursor_window_->Init(ui::LAYER_TEXTURED);
200    root_window_->AddChild(cursor_window_);
201    cursor_window_->Show();
202  } else {
203    GetRootWindowSettings(root_window_.get())->display_id = display_info.id();
204    root_window_->SetHostBounds(display_info.bounds_in_pixel());
205  }
206
207  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
208  const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
209      Shell::GetScreen()->GetPrimaryDisplay().id());
210  DCHECK(display_manager->mirrored_display().is_valid());
211  scoped_ptr<aura::RootWindowTransformer> transformer(
212      internal::CreateRootWindowTransformerForMirroredDisplay(
213          source_display_info,
214          display_info));
215  root_window_->SetRootWindowTransformer(transformer.Pass());
216
217  UpdateCursorLocation();
218}
219
220void MirrorWindowController::UpdateWindow() {
221  if (root_window_.get()) {
222    DisplayManager* display_manager = Shell::GetInstance()->display_manager();
223    const DisplayInfo& mirror_display_info = display_manager->GetDisplayInfo(
224        display_manager->mirrored_display().id());
225    UpdateWindow(mirror_display_info);
226  }
227}
228
229void MirrorWindowController::Close() {
230  if (root_window_.get()) {
231    ui::ContextFactory::GetInstance()->RemoveReflector(reflector_);
232    reflector_ = NULL;
233    NoneCaptureClient* capture_client = static_cast<NoneCaptureClient*>(
234        aura::client::GetCaptureClient(root_window_.get()));
235    delete capture_client;
236
237    root_window_->RemoveRootWindowObserver(
238        Shell::GetInstance()->display_controller());
239    root_window_->RemoveRootWindowObserver(this);
240    root_window_.reset();
241    cursor_window_ = NULL;
242  }
243}
244
245void MirrorWindowController::UpdateCursorLocation() {
246  if (cursor_window_) {
247    // TODO(oshima): Rotate cursor image (including hotpoint).
248    gfx::Point point = aura::Env::GetInstance()->last_mouse_location();
249    Shell::GetPrimaryRootWindow()->ConvertPointToHost(&point);
250    point.Offset(-hot_point_.x(), -hot_point_.y());
251    gfx::Rect bounds = cursor_window_->bounds();
252    bounds.set_origin(point);
253    cursor_window_->SetBounds(bounds);
254  }
255}
256
257void MirrorWindowController::SetMirroredCursor(gfx::NativeCursor cursor) {
258  const gfx::Display& display = Shell::GetScreen()->GetPrimaryDisplay();
259  if (current_cursor_type_ == cursor.native_type() &&
260      current_cursor_rotation_ == display.rotation())
261    return;
262  current_cursor_type_ = cursor.native_type();
263  current_cursor_rotation_ = display.rotation();
264  int resource_id;
265  bool success = ui::GetCursorDataFor(
266      ui::CURSOR_SET_NORMAL,  // Not support custom cursor set.
267      current_cursor_type_,
268      display.device_scale_factor(),
269      &resource_id,
270      &hot_point_);
271  if (!success)
272    return;
273  const gfx::ImageSkia* image =
274      ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id);
275  gfx::ImageSkia rotated = *image;
276  switch (current_cursor_rotation_) {
277    case gfx::Display::ROTATE_0:
278      break;
279    case gfx::Display::ROTATE_90:
280      rotated = gfx::ImageSkiaOperations::CreateRotatedImage(
281          *image, SkBitmapOperations::ROTATION_90_CW);
282      hot_point_.SetPoint(
283          rotated.width() - hot_point_.y(),
284          hot_point_.x());
285      break;
286    case gfx::Display::ROTATE_180:
287      rotated = gfx::ImageSkiaOperations::CreateRotatedImage(
288          *image, SkBitmapOperations::ROTATION_180_CW);
289      hot_point_.SetPoint(
290          rotated.height() - hot_point_.x(),
291          rotated.width() - hot_point_.y());
292      break;
293    case gfx::Display::ROTATE_270:
294      rotated = gfx::ImageSkiaOperations::CreateRotatedImage(
295          *image, SkBitmapOperations::ROTATION_270_CW);
296      hot_point_.SetPoint(
297          hot_point_.y(),
298          rotated.height() - hot_point_.x());
299      break;
300  }
301  cursor_window_delegate_->SetCursorImage(rotated, display);
302
303  if (cursor_window_) {
304    cursor_window_->SetBounds(gfx::Rect(cursor_window_delegate_->size()));
305    cursor_window_->SchedulePaintInRect(
306        gfx::Rect(cursor_window_->bounds().size()));
307    UpdateCursorLocation();
308  }
309}
310
311void MirrorWindowController::SetMirroredCursorVisibility(bool visible) {
312  if (cursor_window_)
313    visible ? cursor_window_->Show() : cursor_window_->Hide();
314}
315
316void MirrorWindowController::OnRootWindowHostResized(
317    const aura::RootWindow* root) {
318  // Do not use |old_size| as it contains RootWindow's (but not host's) size,
319  // and this parameter wil be removed soon.
320  if (mirror_window_host_size_ == root->GetHostSize())
321    return;
322  mirror_window_host_size_ = root->GetHostSize();
323  reflector_->OnMirroringCompositorResized();
324  root_window_->SetRootWindowTransformer(
325      CreateRootWindowTransformer().Pass());
326  UpdateCursorLocation();
327}
328
329
330scoped_ptr<aura::RootWindowTransformer>
331MirrorWindowController::CreateRootWindowTransformer() const {
332  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
333  const DisplayInfo& mirror_display_info = display_manager->GetDisplayInfo(
334      display_manager->mirrored_display().id());
335  const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
336      Shell::GetScreen()->GetPrimaryDisplay().id());
337  DCHECK(display_manager->mirrored_display().is_valid());
338  return scoped_ptr<aura::RootWindowTransformer>(
339      internal::CreateRootWindowTransformerForMirroredDisplay(
340          source_display_info,
341          mirror_display_info));
342}
343
344}  // namespace internal
345}  // namespace ash
346