cursor_window_controller.cc revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
1// Copyright 2014 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/cursor_window_controller.h"
6
7#include "ash/display/display_controller.h"
8#include "ash/display/mirror_window_controller.h"
9#include "ash/root_window_controller.h"
10#include "ash/shell.h"
11#include "ash/shell_window_ids.h"
12#include "ui/aura/env.h"
13#include "ui/aura/window_delegate.h"
14#include "ui/aura/window_event_dispatcher.h"
15#include "ui/base/cursor/cursors_aura.h"
16#include "ui/base/hit_test.h"
17#include "ui/base/resource/resource_bundle.h"
18#include "ui/compositor/dip_util.h"
19#include "ui/gfx/canvas.h"
20#include "ui/gfx/display.h"
21#include "ui/gfx/image/image_skia.h"
22#include "ui/gfx/image/image_skia_operations.h"
23
24namespace ash {
25namespace internal {
26
27class CursorWindowDelegate : public aura::WindowDelegate {
28 public:
29  CursorWindowDelegate() : is_cursor_compositing_enabled_(false) {}
30  virtual ~CursorWindowDelegate() {}
31
32  // aura::WindowDelegate overrides:
33  virtual gfx::Size GetMinimumSize() const OVERRIDE { return size_; }
34  virtual gfx::Size GetMaximumSize() const OVERRIDE { return size_; }
35  virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
36                               const gfx::Rect& new_bounds) OVERRIDE {}
37  virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
38    return gfx::kNullCursor;
39  }
40  virtual int GetNonClientComponent(
41      const gfx::Point& point) const OVERRIDE {
42    return HTNOWHERE;
43  }
44  virtual bool ShouldDescendIntoChildForEventHandling(
45      aura::Window* child,
46      const gfx::Point& location) OVERRIDE {
47    return false;
48  }
49  virtual bool CanFocus() OVERRIDE { return false; }
50  virtual void OnCaptureLost() OVERRIDE {}
51  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
52    canvas->DrawImageInt(cursor_image_, 0, 0);
53  }
54  virtual void OnDeviceScaleFactorChanged(
55      float device_scale_factor) OVERRIDE {}
56  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {}
57  virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE {}
58  virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {}
59  virtual bool HasHitTestMask() const OVERRIDE { return false; }
60  virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}
61  virtual void DidRecreateLayer(ui::Layer* old_layer,
62                                ui::Layer* new_layer) OVERRIDE {}
63
64  // Sets cursor compositing mode on/off.
65  void SetCursorCompositingEnabled(bool enabled) {
66    is_cursor_compositing_enabled_ = enabled;
67  }
68
69  // Sets the cursor image for the |display|'s scale factor.
70  void SetCursorImage(const gfx::ImageSkia& image,
71                      const gfx::Display& display) {
72    float scale_factor = display.device_scale_factor();
73    const gfx::ImageSkiaRep& image_rep = image.GetRepresentation(scale_factor);
74    if (!is_cursor_compositing_enabled_) {
75      // Note that mirror window's scale factor is always 1.0f, therefore we
76      // need to take 2x's image and paint as if it's 1x image.
77      size_ = image_rep.pixel_size();
78      cursor_image_ = gfx::ImageSkia::CreateFrom1xBitmap(image_rep.sk_bitmap());
79    } else {
80      size_ = image.size();
81      cursor_image_ = gfx::ImageSkia(
82          gfx::ImageSkiaRep(image_rep.sk_bitmap(), scale_factor));
83    }
84  }
85
86  const gfx::Size size() const { return size_; }
87
88 private:
89  bool is_cursor_compositing_enabled_;
90  gfx::ImageSkia cursor_image_;
91  gfx::Size size_;
92
93  DISALLOW_COPY_AND_ASSIGN(CursorWindowDelegate);
94};
95
96CursorWindowController::CursorWindowController()
97    : is_cursor_compositing_enabled_(false),
98      container_(NULL),
99      cursor_type_(ui::kCursorNone),
100      cursor_set_(ui::CURSOR_SET_NORMAL),
101      cursor_rotation_(gfx::Display::ROTATE_0),
102      delegate_(new CursorWindowDelegate()) {
103}
104
105CursorWindowController::~CursorWindowController() {
106  SetContainer(NULL);
107}
108
109void CursorWindowController::SetCursorCompositingEnabled(bool enabled) {
110  if (is_cursor_compositing_enabled_ != enabled) {
111    is_cursor_compositing_enabled_ = enabled;
112    delegate_->SetCursorCompositingEnabled(enabled);
113    UpdateCursorImage();
114    UpdateContainer();
115  }
116}
117
118void CursorWindowController::UpdateContainer() {
119  display_ = Shell::GetScreen()->GetPrimaryDisplay();
120  if (is_cursor_compositing_enabled_) {
121    SetDisplay(display_);
122  } else {
123    aura::WindowTreeHost* mirror_host = Shell::GetInstance()->
124        display_controller()->mirror_window_controller()->host();
125    SetContainer(mirror_host ? mirror_host->window() : NULL);
126  }
127}
128
129void CursorWindowController::SetDisplay(const gfx::Display& display) {
130  if (!is_cursor_compositing_enabled_)
131    return;
132
133  display_ = display;
134  aura::Window* root_window = Shell::GetInstance()->display_controller()->
135      GetRootWindowForDisplayId(display.id());
136  if (!root_window)
137    return;
138
139  SetContainer(GetRootWindowController(root_window)->GetContainer(
140      kShellWindowId_MouseCursorContainer));
141  SetBoundsInScreen(display.bounds());
142}
143
144void CursorWindowController::UpdateLocation() {
145  if (!cursor_window_)
146    return;
147
148  gfx::Point point = aura::Env::GetInstance()->last_mouse_location();
149  if (!is_cursor_compositing_enabled_) {
150    Shell::GetPrimaryRootWindow()->GetHost()->ConvertPointToHost(&point);
151  } else {
152    point.Offset(-bounds_in_screen_.x(), -bounds_in_screen_.y());
153  }
154  point.Offset(-hot_point_.x(), -hot_point_.y());
155  gfx::Rect bounds = cursor_window_->bounds();
156  bounds.set_origin(point);
157  cursor_window_->SetBounds(bounds);
158}
159
160void CursorWindowController::SetCursor(gfx::NativeCursor cursor) {
161  if (cursor_type_ == cursor.native_type() &&
162      cursor_rotation_ == display_.rotation())
163    return;
164  cursor_type_ = cursor.native_type();
165  cursor_rotation_ = display_.rotation();
166  UpdateCursorImage();
167}
168
169void CursorWindowController::SetCursorSet(ui::CursorSetType cursor_set) {
170  cursor_set_ = cursor_set;
171  UpdateCursorImage();
172}
173
174void CursorWindowController::SetVisibility(bool visible) {
175  if (!cursor_window_)
176    return;
177  if (visible)
178    cursor_window_->Show();
179  else
180    cursor_window_->Hide();
181}
182
183void CursorWindowController::SetContainer(aura::Window* container) {
184  if (container_ == container)
185    return;
186
187  container_ = container;
188  if (!container) {
189    cursor_window_.reset();
190    return;
191  }
192
193  if (!cursor_window_) {
194    cursor_window_.reset(new aura::Window(delegate_.get()));
195    cursor_window_->SetTransparent(true);
196    cursor_window_->Init(aura::WINDOW_LAYER_TEXTURED);
197    cursor_window_->set_ignore_events(true);
198    cursor_window_->set_owned_by_parent(false);
199  }
200
201  container->AddChild(cursor_window_.get());
202  cursor_window_->Show();
203  SetBoundsInScreen(container->bounds());
204}
205
206void CursorWindowController::SetBoundsInScreen(const gfx::Rect& bounds) {
207  bounds_in_screen_ = bounds;
208  UpdateLocation();
209}
210
211void CursorWindowController::UpdateCursorImage() {
212  int resource_id;
213  // TODO(hshi): support custom cursor set.
214  if (!ui::GetCursorDataFor(cursor_set_,
215                            cursor_type_,
216                            display_.device_scale_factor(),
217                            &resource_id,
218                            &hot_point_)) {
219    return;
220  }
221  const gfx::ImageSkia* image =
222      ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id);
223  gfx::ImageSkia rotated = *image;
224  if (!is_cursor_compositing_enabled_) {
225    switch (cursor_rotation_) {
226      case gfx::Display::ROTATE_0:
227        break;
228      case gfx::Display::ROTATE_90:
229        rotated = gfx::ImageSkiaOperations::CreateRotatedImage(
230            *image, SkBitmapOperations::ROTATION_90_CW);
231        hot_point_.SetPoint(
232            rotated.width() - hot_point_.y(),
233            hot_point_.x());
234        break;
235      case gfx::Display::ROTATE_180:
236        rotated = gfx::ImageSkiaOperations::CreateRotatedImage(
237            *image, SkBitmapOperations::ROTATION_180_CW);
238        hot_point_.SetPoint(
239            rotated.height() - hot_point_.x(),
240            rotated.width() - hot_point_.y());
241        break;
242      case gfx::Display::ROTATE_270:
243        rotated = gfx::ImageSkiaOperations::CreateRotatedImage(
244            *image, SkBitmapOperations::ROTATION_270_CW);
245        hot_point_.SetPoint(
246            hot_point_.y(),
247            rotated.height() - hot_point_.x());
248        break;
249    }
250  } else {
251    hot_point_ = ui::ConvertPointToDIP(Shell::GetPrimaryRootWindow()->layer(),
252                                       hot_point_);
253  }
254  delegate_->SetCursorImage(rotated, display_);
255  if (cursor_window_) {
256    cursor_window_->SetBounds(gfx::Rect(delegate_->size()));
257    cursor_window_->SchedulePaintInRect(
258        gfx::Rect(cursor_window_->bounds().size()));
259    UpdateLocation();
260  }
261}
262
263}  // namespace internal
264}  // namespace ash
265