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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/screen.h"
#import <ApplicationServices/ApplicationServices.h>
#import <Cocoa/Cocoa.h>
#include "base/logging.h"
#include "base/mac/sdk_forward_declarations.h"
#include "ui/gfx/display.h"
namespace {
gfx::Rect ConvertCoordinateSystem(NSRect ns_rect) {
// Primary monitor is defined as the monitor with the menubar,
// which is always at index 0.
NSScreen* primary_screen = [[NSScreen screens] objectAtIndex:0];
float primary_screen_height = [primary_screen frame].size.height;
gfx::Rect rect(NSRectToCGRect(ns_rect));
rect.set_y(primary_screen_height - rect.y() - rect.height());
return rect;
}
NSScreen* GetMatchingScreen(const gfx::Rect& match_rect) {
// Default to the monitor with the current keyboard focus, in case
// |match_rect| is not on any screen at all.
NSScreen* max_screen = [NSScreen mainScreen];
int max_area = 0;
for (NSScreen* screen in [NSScreen screens]) {
gfx::Rect monitor_area = ConvertCoordinateSystem([screen frame]);
gfx::Rect intersection = gfx::IntersectRects(monitor_area, match_rect);
int area = intersection.width() * intersection.height();
if (area > max_area) {
max_area = area;
max_screen = screen;
}
}
return max_screen;
}
gfx::Display GetDisplayForScreen(NSScreen* screen, bool is_primary) {
NSRect frame = [screen frame];
// TODO(oshima): Implement ID and Observer.
gfx::Display display(0, gfx::Rect(NSRectToCGRect(frame)));
NSRect visible_frame = [screen visibleFrame];
// Convert work area's coordinate systems.
if (is_primary) {
gfx::Rect work_area = gfx::Rect(NSRectToCGRect(visible_frame));
work_area.set_y(frame.size.height - visible_frame.origin.y -
visible_frame.size.height);
display.set_work_area(work_area);
} else {
display.set_bounds(ConvertCoordinateSystem(frame));
display.set_work_area(ConvertCoordinateSystem(visible_frame));
}
CGFloat scale;
if ([screen respondsToSelector:@selector(backingScaleFactor)])
scale = [screen backingScaleFactor];
else
scale = [screen userSpaceScaleFactor];
display.set_device_scale_factor(scale);
return display;
}
class ScreenMac : public gfx::Screen {
public:
ScreenMac() {}
virtual bool IsDIPEnabled() OVERRIDE {
return true;
}
virtual gfx::Point GetCursorScreenPoint() OVERRIDE {
NSPoint mouseLocation = [NSEvent mouseLocation];
// Flip coordinates to gfx (0,0 in top-left corner) using primary screen.
NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
mouseLocation.y = NSMaxY([screen frame]) - mouseLocation.y;
return gfx::Point(mouseLocation.x, mouseLocation.y);
}
virtual gfx::NativeWindow GetWindowAtCursorScreenPoint() OVERRIDE {
NOTIMPLEMENTED();
return gfx::NativeWindow();
}
virtual int GetNumDisplays() OVERRIDE {
// Don't just return the number of online displays. It includes displays
// that mirror other displays, which are not desired in the count. It's
// tempting to use the count returned by CGGetActiveDisplayList, but active
// displays exclude sleeping displays, and those are desired in the count.
// It would be ridiculous to have this many displays connected, but
// CGDirectDisplayID is just an integer, so supporting up to this many
// doesn't hurt.
CGDirectDisplayID online_displays[128];
CGDisplayCount online_display_count = 0;
if (CGGetOnlineDisplayList(arraysize(online_displays),
online_displays,
&online_display_count) != kCGErrorSuccess) {
// 1 is a reasonable assumption.
return 1;
}
int display_count = 0;
for (CGDisplayCount online_display_index = 0;
online_display_index < online_display_count;
++online_display_index) {
CGDirectDisplayID online_display = online_displays[online_display_index];
if (CGDisplayMirrorsDisplay(online_display) == kCGNullDirectDisplay) {
// If this display doesn't mirror any other, include it in the count.
// The primary display in a mirrored set will be counted, but those that
// mirror it will not be.
++display_count;
}
}
return display_count;
}
virtual gfx::Display GetDisplayNearestWindow(
gfx::NativeView view) const OVERRIDE {
NSWindow* window = [view window];
if (!window)
return GetPrimaryDisplay();
NSScreen* match_screen = [window screen];
return GetDisplayForScreen(match_screen, false /* may not be primary */);
}
virtual gfx::Display GetDisplayNearestPoint(
const gfx::Point& point) const OVERRIDE {
NSPoint ns_point = NSPointFromCGPoint(point.ToCGPoint());
NSArray* screens = [NSScreen screens];
NSScreen* primary = [screens objectAtIndex:0];
ns_point.y = NSMaxY([primary frame]) - ns_point.y;
for (NSScreen* screen in screens) {
if (NSMouseInRect(ns_point, [screen frame], NO))
return GetDisplayForScreen(screen, screen == primary);
}
return GetPrimaryDisplay();
}
// Returns the display that most closely intersects the provided bounds.
virtual gfx::Display GetDisplayMatching(
const gfx::Rect& match_rect) const OVERRIDE {
NSScreen* match_screen = GetMatchingScreen(match_rect);
return GetDisplayForScreen(match_screen, false /* may not be primary */);
}
// Returns the primary display.
virtual gfx::Display GetPrimaryDisplay() const OVERRIDE {
// Primary display is defined as the display with the menubar,
// which is always at index 0.
NSScreen* primary = [[NSScreen screens] objectAtIndex:0];
gfx::Display display = GetDisplayForScreen(primary, true /* primary */);
return display;
}
virtual void AddObserver(gfx::DisplayObserver* observer) OVERRIDE {
// TODO(oshima): crbug.com/122863.
}
virtual void RemoveObserver(gfx::DisplayObserver* observer) OVERRIDE {
// TODO(oshima): crbug.com/122863.
}
private:
DISALLOW_COPY_AND_ASSIGN(ScreenMac);
};
} // namespace
namespace gfx {
Screen* CreateNativeScreen() {
return new ScreenMac;
}
}
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