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>
10 #include "base/logging.h"
11 #include "ui/gfx/display.h"
13 #if !defined(MAC_OS_X_VERSION_10_7) || \
14 MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
16 @interface NSScreen (LionAPI)
17 - (CGFloat)backingScaleFactor;
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, bool is_primary) {
54 NSRect frame = [screen frame];
55 // TODO(oshima): Implement ID and Observer.
56 gfx::Display display(0, gfx::Rect(NSRectToCGRect(frame)));
58 NSRect visible_frame = [screen visibleFrame];
60 // Convert work area's coordinate systems.
62 gfx::Rect work_area = gfx::Rect(NSRectToCGRect(visible_frame));
63 work_area.set_y(frame.size.height - visible_frame.origin.y -
64 visible_frame.size.height);
65 display.set_work_area(work_area);
67 display.set_work_area(ConvertCoordinateSystem(visible_frame));
70 if ([screen respondsToSelector:@selector(backingScaleFactor)])
71 scale = [screen backingScaleFactor];
73 scale = [screen userSpaceScaleFactor];
74 display.set_device_scale_factor(scale);
78 class ScreenMac : public gfx::Screen {
82 virtual bool IsDIPEnabled() OVERRIDE {
86 virtual gfx::Point GetCursorScreenPoint() OVERRIDE {
87 NSPoint mouseLocation = [NSEvent mouseLocation];
88 // Flip coordinates to gfx (0,0 in top-left corner) using primary screen.
89 NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
90 mouseLocation.y = NSMaxY([screen frame]) - mouseLocation.y;
91 return gfx::Point(mouseLocation.x, mouseLocation.y);
94 virtual gfx::NativeWindow GetWindowAtCursorScreenPoint() OVERRIDE {
96 return gfx::NativeWindow();
99 virtual int GetNumDisplays() OVERRIDE {
100 // Don't just return the number of online displays. It includes displays
101 // that mirror other displays, which are not desired in the count. It's
102 // tempting to use the count returned by CGGetActiveDisplayList, but active
103 // displays exclude sleeping displays, and those are desired in the count.
105 // It would be ridiculous to have this many displays connected, but
106 // CGDirectDisplayID is just an integer, so supporting up to this many
108 CGDirectDisplayID online_displays[128];
109 CGDisplayCount online_display_count = 0;
110 if (CGGetOnlineDisplayList(arraysize(online_displays),
112 &online_display_count) != kCGErrorSuccess) {
113 // 1 is a reasonable assumption.
117 int display_count = 0;
118 for (CGDisplayCount online_display_index = 0;
119 online_display_index < online_display_count;
120 ++online_display_index) {
121 CGDirectDisplayID online_display = online_displays[online_display_index];
122 if (CGDisplayMirrorsDisplay(online_display) == kCGNullDirectDisplay) {
123 // If this display doesn't mirror any other, include it in the count.
124 // The primary display in a mirrored set will be counted, but those that
125 // mirror it will not be.
130 return display_count;
133 virtual gfx::Display GetDisplayNearestWindow(
134 gfx::NativeView view) const OVERRIDE {
135 NSWindow* window = [view window];
137 return GetPrimaryDisplay();
138 NSScreen* match_screen = [window screen];
139 return GetDisplayForScreen(match_screen, false /* may not be primary */);
142 virtual gfx::Display GetDisplayNearestPoint(
143 const gfx::Point& point) const OVERRIDE {
144 NSPoint ns_point = NSPointFromCGPoint(point.ToCGPoint());
146 NSArray* screens = [NSScreen screens];
147 NSScreen* primary = [screens objectAtIndex:0];
148 for (NSScreen* screen in screens) {
149 if (NSMouseInRect(ns_point, [screen frame], NO))
150 return GetDisplayForScreen(screen, screen == primary);
152 return GetPrimaryDisplay();
155 // Returns the display that most closely intersects the provided bounds.
156 virtual gfx::Display GetDisplayMatching(
157 const gfx::Rect& match_rect) const OVERRIDE {
158 NSScreen* match_screen = GetMatchingScreen(match_rect);
159 return GetDisplayForScreen(match_screen, false /* may not be primary */);
162 // Returns the primary display.
163 virtual gfx::Display GetPrimaryDisplay() const OVERRIDE {
164 // Primary display is defined as the display with the menubar,
165 // which is always at index 0.
166 NSScreen* primary = [[NSScreen screens] objectAtIndex:0];
167 gfx::Display display = GetDisplayForScreen(primary, true /* primary */);
171 virtual void AddObserver(gfx::DisplayObserver* observer) OVERRIDE {
172 // TODO(oshima): crbug.com/122863.
175 virtual void RemoveObserver(gfx::DisplayObserver* observer) OVERRIDE {
176 // TODO(oshima): crbug.com/122863.
180 DISALLOW_COPY_AND_ASSIGN(ScreenMac);
187 Screen* CreateNativeScreen() {
188 return new ScreenMac;