1 // Copyright (c) 2012 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.
5 #include "ui/gfx/screen.h"
7 #import <ApplicationServices/ApplicationServices.h>
8 #import <Cocoa/Cocoa.h>
12 #include "base/logging.h"
13 #include "base/mac/sdk_forward_declarations.h"
14 #include "base/timer/timer.h"
15 #include "ui/gfx/display.h"
16 #include "ui/gfx/display_change_notifier.h"
20 // The delay to handle the display configuration changes.
21 // See comments in ScreenMac::HandleDisplayReconfiguration.
22 const int64 kConfigureDelayMs = 500;
24 gfx::Rect ConvertCoordinateSystem(NSRect ns_rect) {
25 // Primary monitor is defined as the monitor with the menubar,
26 // which is always at index 0.
27 NSScreen* primary_screen = [[NSScreen screens] objectAtIndex:0];
28 float primary_screen_height = [primary_screen frame].size.height;
29 gfx::Rect rect(NSRectToCGRect(ns_rect));
30 rect.set_y(primary_screen_height - rect.y() - rect.height());
34 NSScreen* GetMatchingScreen(const gfx::Rect& match_rect) {
35 // Default to the monitor with the current keyboard focus, in case
36 // |match_rect| is not on any screen at all.
37 NSScreen* max_screen = [NSScreen mainScreen];
40 for (NSScreen* screen in [NSScreen screens]) {
41 gfx::Rect monitor_area = ConvertCoordinateSystem([screen frame]);
42 gfx::Rect intersection = gfx::IntersectRects(monitor_area, match_rect);
43 int area = intersection.width() * intersection.height();
44 if (area > max_area) {
53 gfx::Display GetDisplayForScreen(NSScreen* screen) {
54 NSRect frame = [screen frame];
56 CGDirectDisplayID display_id = [[[screen deviceDescription]
57 objectForKey:@"NSScreenNumber"] unsignedIntValue];
59 gfx::Display display(display_id, gfx::Rect(NSRectToCGRect(frame)));
60 NSRect visible_frame = [screen visibleFrame];
61 NSScreen* primary = [[NSScreen screens] objectAtIndex:0];
63 // Convert work area's coordinate systems.
64 if ([screen isEqual:primary]) {
65 gfx::Rect work_area = gfx::Rect(NSRectToCGRect(visible_frame));
66 work_area.set_y(frame.size.height - visible_frame.origin.y -
67 visible_frame.size.height);
68 display.set_work_area(work_area);
70 display.set_bounds(ConvertCoordinateSystem(frame));
71 display.set_work_area(ConvertCoordinateSystem(visible_frame));
74 if ([screen respondsToSelector:@selector(backingScaleFactor)])
75 scale = [screen backingScaleFactor];
77 scale = [screen userSpaceScaleFactor];
78 display.set_device_scale_factor(scale);
79 // CGDisplayRotation returns a double. Display::SetRotationAsDegree will
80 // handle the unexpected situations were the angle is not a multiple of 90.
81 display.SetRotationAsDegree(static_cast<int>(CGDisplayRotation(display_id)));
85 class ScreenMac : public gfx::Screen {
88 displays_ = BuildDisplaysFromQuartz();
90 CGDisplayRegisterReconfigurationCallback(
91 ScreenMac::DisplayReconfigurationCallBack, this);
94 virtual bool IsDIPEnabled() OVERRIDE {
98 virtual gfx::Point GetCursorScreenPoint() OVERRIDE {
99 NSPoint mouseLocation = [NSEvent mouseLocation];
100 // Flip coordinates to gfx (0,0 in top-left corner) using primary screen.
101 NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
102 mouseLocation.y = NSMaxY([screen frame]) - mouseLocation.y;
103 return gfx::Point(mouseLocation.x, mouseLocation.y);
106 virtual gfx::NativeWindow GetWindowUnderCursor() OVERRIDE {
108 return gfx::NativeWindow();
111 virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
114 return gfx::NativeWindow();
117 virtual int GetNumDisplays() const OVERRIDE {
118 return GetAllDisplays().size();
122 virtual std::vector<gfx::Display> GetAllDisplays() const OVERRIDE {
126 virtual gfx::Display GetDisplayNearestWindow(
127 gfx::NativeView view) const OVERRIDE {
128 NSWindow* window = nil;
129 #if !defined(USE_AURA)
130 window = [view window];
133 return GetPrimaryDisplay();
134 NSScreen* match_screen = [window screen];
136 return GetPrimaryDisplay();
137 return GetDisplayForScreen(match_screen);
140 virtual gfx::Display GetDisplayNearestPoint(
141 const gfx::Point& point) const OVERRIDE {
142 NSPoint ns_point = NSPointFromCGPoint(point.ToCGPoint());
144 NSArray* screens = [NSScreen screens];
145 NSScreen* primary = [screens objectAtIndex:0];
146 ns_point.y = NSMaxY([primary frame]) - ns_point.y;
147 for (NSScreen* screen in screens) {
148 if (NSMouseInRect(ns_point, [screen frame], NO))
149 return GetDisplayForScreen(screen);
151 return GetPrimaryDisplay();
154 // Returns the display that most closely intersects the provided bounds.
155 virtual gfx::Display GetDisplayMatching(
156 const gfx::Rect& match_rect) const OVERRIDE {
157 NSScreen* match_screen = GetMatchingScreen(match_rect);
158 return GetDisplayForScreen(match_screen);
161 // Returns the primary display.
162 virtual gfx::Display GetPrimaryDisplay() const OVERRIDE {
163 // Primary display is defined as the display with the menubar,
164 // which is always at index 0.
165 NSScreen* primary = [[NSScreen screens] objectAtIndex:0];
166 gfx::Display display = GetDisplayForScreen(primary);
170 virtual void AddObserver(gfx::DisplayObserver* observer) OVERRIDE {
171 change_notifier_.AddObserver(observer);
174 virtual void RemoveObserver(gfx::DisplayObserver* observer) OVERRIDE {
175 change_notifier_.RemoveObserver(observer);
178 static void DisplayReconfigurationCallBack(CGDirectDisplayID display,
179 CGDisplayChangeSummaryFlags flags,
181 if (flags & kCGDisplayBeginConfigurationFlag)
184 static_cast<ScreenMac*>(userInfo)->HandleDisplayReconfiguration();
187 void HandleDisplayReconfiguration() {
188 // Given that we need to rebuild the list of displays, we want to coalesce
189 // the events. For that, we use a timer that will be reset every time we get
190 // a new event and will be fulfilled kConfigureDelayMs after the latest.
191 if (configure_timer_.get() && configure_timer_->IsRunning()) {
192 configure_timer_->Reset();
196 configure_timer_.reset(new base::OneShotTimer<ScreenMac>());
197 configure_timer_->Start(
199 base::TimeDelta::FromMilliseconds(kConfigureDelayMs),
201 &ScreenMac::ConfigureTimerFired);
205 void ConfigureTimerFired() {
206 std::vector<gfx::Display> old_displays = displays_;
207 displays_ = BuildDisplaysFromQuartz();
209 change_notifier_.NotifyDisplaysChanged(old_displays, displays_);
212 std::vector<gfx::Display> BuildDisplaysFromQuartz() const {
213 // Don't just return all online displays. This would include displays
214 // that mirror other displays, which are not desired in this list. It's
215 // tempting to use the count returned by CGGetActiveDisplayList, but active
216 // displays exclude sleeping displays, and those are desired.
218 // It would be ridiculous to have this many displays connected, but
219 // CGDirectDisplayID is just an integer, so supporting up to this many
221 CGDirectDisplayID online_displays[128];
222 CGDisplayCount online_display_count = 0;
223 if (CGGetOnlineDisplayList(arraysize(online_displays),
225 &online_display_count) != kCGErrorSuccess) {
226 return std::vector<gfx::Display>(1, GetPrimaryDisplay());
229 typedef std::map<int64, NSScreen*> ScreenIdsToScreensMap;
230 ScreenIdsToScreensMap screen_ids_to_screens;
231 for (NSScreen* screen in [NSScreen screens]) {
232 NSDictionary* screen_device_description = [screen deviceDescription];
233 int64 screen_id = [[screen_device_description
234 objectForKey:@"NSScreenNumber"] unsignedIntValue];
235 screen_ids_to_screens[screen_id] = screen;
238 std::vector<gfx::Display> displays;
239 for (CGDisplayCount online_display_index = 0;
240 online_display_index < online_display_count;
241 ++online_display_index) {
242 CGDirectDisplayID online_display = online_displays[online_display_index];
243 if (CGDisplayMirrorsDisplay(online_display) == kCGNullDirectDisplay) {
244 // If this display doesn't mirror any other, include it in the list.
245 // The primary display in a mirrored set will be counted, but those that
246 // mirror it will not be.
247 ScreenIdsToScreensMap::iterator foundScreen =
248 screen_ids_to_screens.find(online_display);
249 if (foundScreen != screen_ids_to_screens.end()) {
250 displays.push_back(GetDisplayForScreen(foundScreen->second));
255 if (!displays.size())
256 return std::vector<gfx::Display>(1, GetPrimaryDisplay());
261 // The displays currently attached to the device.
262 std::vector<gfx::Display> displays_;
264 // The timer to delay configuring outputs. See also the comments in
265 // HandleDisplayReconfiguration().
266 scoped_ptr<base::OneShotTimer<ScreenMac> > configure_timer_;
268 gfx::DisplayChangeNotifier change_notifier_;
270 DISALLOW_COPY_AND_ASSIGN(ScreenMac);
277 #if !defined(USE_AURA)
278 Screen* CreateNativeScreen() {
279 return new ScreenMac;