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 ~ScreenMac() override {
95 CGDisplayRemoveReconfigurationCallback(
96 ScreenMac::DisplayReconfigurationCallBack, this);
99 gfx::Point GetCursorScreenPoint() override {
100 NSPoint mouseLocation = [NSEvent mouseLocation];
101 // Flip coordinates to gfx (0,0 in top-left corner) using primary screen.
102 NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
103 mouseLocation.y = NSMaxY([screen frame]) - mouseLocation.y;
104 return gfx::Point(mouseLocation.x, mouseLocation.y);
107 gfx::NativeWindow GetWindowUnderCursor() override {
109 return gfx::NativeWindow();
112 gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override {
114 return gfx::NativeWindow();
117 int GetNumDisplays() const override { return GetAllDisplays().size(); }
119 std::vector<gfx::Display> GetAllDisplays() const override {
123 gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const override {
124 NSWindow* window = nil;
125 #if !defined(USE_AURA)
127 window = [view window];
130 return GetPrimaryDisplay();
131 NSScreen* match_screen = [window screen];
133 return GetPrimaryDisplay();
134 return GetDisplayForScreen(match_screen);
137 gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const override {
138 NSPoint ns_point = NSPointFromCGPoint(point.ToCGPoint());
140 NSArray* screens = [NSScreen screens];
141 NSScreen* primary = [screens objectAtIndex:0];
142 ns_point.y = NSMaxY([primary frame]) - ns_point.y;
143 for (NSScreen* screen in screens) {
144 if (NSMouseInRect(ns_point, [screen frame], NO))
145 return GetDisplayForScreen(screen);
147 return GetPrimaryDisplay();
150 // Returns the display that most closely intersects the provided bounds.
151 gfx::Display GetDisplayMatching(const gfx::Rect& match_rect) const override {
152 NSScreen* match_screen = GetMatchingScreen(match_rect);
153 return GetDisplayForScreen(match_screen);
156 // Returns the primary display.
157 gfx::Display GetPrimaryDisplay() const override {
158 // Primary display is defined as the display with the menubar,
159 // which is always at index 0.
160 NSScreen* primary = [[NSScreen screens] objectAtIndex:0];
161 gfx::Display display = GetDisplayForScreen(primary);
165 void AddObserver(gfx::DisplayObserver* observer) override {
166 change_notifier_.AddObserver(observer);
169 void RemoveObserver(gfx::DisplayObserver* observer) override {
170 change_notifier_.RemoveObserver(observer);
173 static void DisplayReconfigurationCallBack(CGDirectDisplayID display,
174 CGDisplayChangeSummaryFlags flags,
176 if (flags & kCGDisplayBeginConfigurationFlag)
179 static_cast<ScreenMac*>(userInfo)->HandleDisplayReconfiguration();
182 void HandleDisplayReconfiguration() {
183 // Given that we need to rebuild the list of displays, we want to coalesce
184 // the events. For that, we use a timer that will be reset every time we get
185 // a new event and will be fulfilled kConfigureDelayMs after the latest.
186 if (configure_timer_.get() && configure_timer_->IsRunning()) {
187 configure_timer_->Reset();
191 configure_timer_.reset(new base::OneShotTimer<ScreenMac>());
192 configure_timer_->Start(
194 base::TimeDelta::FromMilliseconds(kConfigureDelayMs),
196 &ScreenMac::ConfigureTimerFired);
200 void ConfigureTimerFired() {
201 std::vector<gfx::Display> old_displays = displays_;
202 displays_ = BuildDisplaysFromQuartz();
204 change_notifier_.NotifyDisplaysChanged(old_displays, displays_);
207 std::vector<gfx::Display> BuildDisplaysFromQuartz() const {
208 // Don't just return all online displays. This would include displays
209 // that mirror other displays, which are not desired in this list. It's
210 // tempting to use the count returned by CGGetActiveDisplayList, but active
211 // displays exclude sleeping displays, and those are desired.
213 // It would be ridiculous to have this many displays connected, but
214 // CGDirectDisplayID is just an integer, so supporting up to this many
216 CGDirectDisplayID online_displays[128];
217 CGDisplayCount online_display_count = 0;
218 if (CGGetOnlineDisplayList(arraysize(online_displays),
220 &online_display_count) != kCGErrorSuccess) {
221 return std::vector<gfx::Display>(1, GetPrimaryDisplay());
224 typedef std::map<int64, NSScreen*> ScreenIdsToScreensMap;
225 ScreenIdsToScreensMap screen_ids_to_screens;
226 for (NSScreen* screen in [NSScreen screens]) {
227 NSDictionary* screen_device_description = [screen deviceDescription];
228 int64 screen_id = [[screen_device_description
229 objectForKey:@"NSScreenNumber"] unsignedIntValue];
230 screen_ids_to_screens[screen_id] = screen;
233 std::vector<gfx::Display> displays;
234 for (CGDisplayCount online_display_index = 0;
235 online_display_index < online_display_count;
236 ++online_display_index) {
237 CGDirectDisplayID online_display = online_displays[online_display_index];
238 if (CGDisplayMirrorsDisplay(online_display) == kCGNullDirectDisplay) {
239 // If this display doesn't mirror any other, include it in the list.
240 // The primary display in a mirrored set will be counted, but those that
241 // mirror it will not be.
242 ScreenIdsToScreensMap::iterator foundScreen =
243 screen_ids_to_screens.find(online_display);
244 if (foundScreen != screen_ids_to_screens.end()) {
245 displays.push_back(GetDisplayForScreen(foundScreen->second));
250 if (!displays.size())
251 return std::vector<gfx::Display>(1, GetPrimaryDisplay());
256 // The displays currently attached to the device.
257 std::vector<gfx::Display> displays_;
259 // The timer to delay configuring outputs. See also the comments in
260 // HandleDisplayReconfiguration().
261 scoped_ptr<base::OneShotTimer<ScreenMac> > configure_timer_;
263 gfx::DisplayChangeNotifier change_notifier_;
265 DISALLOW_COPY_AND_ASSIGN(ScreenMac);
272 #if !defined(USE_AURA)
273 Screen* CreateNativeScreen() {
274 return new ScreenMac;