gecko-dev/widget/cocoa/ScreenHelperCocoa.mm
Samael Wang e6f4039653 Bug 1350643 - Part 4.1: Get per-monitor dpi in ScreenHelperCocoa. r=mstange
MozReview-Commit-ID: OHa8h2sh26

--HG--
extra : rebase_source : 67d7be6a51ad81d0d2cfe48ad4c92d0a6ef3c666
2017-06-06 18:18:52 +08:00

171 lines
4.8 KiB
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ScreenHelperCocoa.h"
#import <Cocoa/Cocoa.h>
#include "mozilla/Logging.h"
#include "nsCocoaUtils.h"
#include "nsObjCExceptions.h"
static LazyLogModule sScreenLog("WidgetScreen");
@interface ScreenHelperDelegate : NSObject
{
@private
mozilla::widget::ScreenHelperCocoa* mHelper;
}
- (id)initWithScreenHelper:(mozilla::widget::ScreenHelperCocoa*)aScreenHelper;
- (void)didChangeScreenParameters:(NSNotification*)aNotification;
@end
@implementation ScreenHelperDelegate
- (id)initWithScreenHelper:(mozilla::widget::ScreenHelperCocoa*)aScreenHelper
{
if ((self = [self init])) {
mHelper = aScreenHelper;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(didChangeScreenParameters:)
name:NSApplicationDidChangeScreenParametersNotification
object:nil];
}
return self;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[super dealloc];
}
- (void)didChangeScreenParameters:(NSNotification*)aNotification
{
MOZ_LOG(sScreenLog, LogLevel::Debug,
("Received NSApplicationDidChangeScreenParametersNotification"));
mHelper->RefreshScreens();
}
@end
namespace mozilla {
namespace widget {
ScreenHelperCocoa::ScreenHelperCocoa()
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
MOZ_LOG(sScreenLog, LogLevel::Debug, ("ScreenHelperCocoa created"));
mDelegate = [[ScreenHelperDelegate alloc] initWithScreenHelper:this];
RefreshScreens();
NS_OBJC_END_TRY_ABORT_BLOCK;
}
ScreenHelperCocoa::~ScreenHelperCocoa()
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
[mDelegate release];
NS_OBJC_END_TRY_ABORT_BLOCK;
}
static already_AddRefed<Screen>
MakeScreen(NSScreen* aScreen)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
DesktopToLayoutDeviceScale contentsScaleFactor(nsCocoaUtils::GetBackingScaleFactor(aScreen));
CSSToLayoutDeviceScale defaultCssScaleFactor(contentsScaleFactor.scale);
NSRect frame = [aScreen frame];
LayoutDeviceIntRect rect =
nsCocoaUtils::CocoaRectToGeckoRectDevPix(frame, contentsScaleFactor.scale);
frame = [aScreen visibleFrame];
LayoutDeviceIntRect availRect =
nsCocoaUtils::CocoaRectToGeckoRectDevPix(frame, contentsScaleFactor.scale);
NSWindowDepth depth = [aScreen depth];
uint32_t pixelDepth = NSBitsPerPixelFromDepth(depth);
float dpi = 96.0f;
CGDirectDisplayID displayID =
[[[aScreen deviceDescription] objectForKey:@"NSScreenNumber"] intValue];
CGFloat heightMM = ::CGDisplayScreenSize(displayID).height;
if (heightMM > 0) {
dpi = rect.height / (heightMM / MM_PER_INCH_FLOAT);
}
MOZ_LOG(sScreenLog, LogLevel::Debug,
("New screen [%d %d %d %d (%d %d %d %d) %d %f %f %f]",
rect.x, rect.y, rect.width, rect.height,
availRect.x, availRect.y, availRect.width, availRect.height,
pixelDepth, contentsScaleFactor.scale, defaultCssScaleFactor.scale,
dpi));
RefPtr<Screen> screen = new Screen(rect, availRect,
pixelDepth, pixelDepth,
contentsScaleFactor, defaultCssScaleFactor,
dpi);
return screen.forget();
NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(nullptr);
}
void
ScreenHelperCocoa::RefreshScreens()
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
MOZ_LOG(sScreenLog, LogLevel::Debug, ("Refreshing screens"));
AutoTArray<RefPtr<Screen>, 4> screens;
for (NSScreen* screen in [NSScreen screens]) {
NSDictionary *desc = [screen deviceDescription];
if ([desc objectForKey:NSDeviceIsScreen] == nil) {
continue;
}
screens.AppendElement(MakeScreen(screen));
}
ScreenManager& screenManager = ScreenManager::GetSingleton();
screenManager.Refresh(Move(screens));
NS_OBJC_END_TRY_ABORT_BLOCK;
}
NSScreen*
ScreenHelperCocoa::CocoaScreenForScreen(nsIScreen* aScreen)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
for (NSScreen* screen in [NSScreen screens]) {
NSDictionary *desc = [screen deviceDescription];
if ([desc objectForKey:NSDeviceIsScreen] == nil) {
continue;
}
LayoutDeviceIntRect rect;
double scale;
aScreen->GetRect(&rect.x, &rect.y, &rect.width, &rect.height);
aScreen->GetContentsScaleFactor(&scale);
NSRect frame = [screen frame];
LayoutDeviceIntRect frameRect =
nsCocoaUtils::CocoaRectToGeckoRectDevPix(frame, scale);
if (rect == frameRect) {
return screen;
}
}
return [NSScreen mainScreen];
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
} // namespace widget
} // namespace mozilla