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Minimal test - lines (79, 109)

Code

static already_AddRefed MakeScreen(NSScreen* aScreen) {
  NS_OBJC_BEGIN_TRY_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 = new Screen(rect, availRect, pixelDepth, pixelDepth, contentsScaleFactor,
                                     defaultCssScaleFactor, dpi);
  return screen.forget();

  NS_OBJC_END_TRY_BLOCK_RETURN(nullptr);
}

Minimal test - lines (59, 69)

Code

ScreenHelperCocoa::ScreenHelperCocoa() {
  NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;

  MOZ_LOG(sScreenLog, LogLevel::Debug, ("ScreenHelperCocoa created"));

  mDelegate = [[ScreenHelperDelegate alloc] initWithScreenHelper:this];

  RefreshScreens();

  NS_OBJC_END_TRY_IGNORE_BLOCK;
}

Minimal test - lines (71, 77)

Code

ScreenHelperCocoa::~ScreenHelperCocoa() {
  NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;

  [mDelegate release];

  NS_OBJC_END_TRY_IGNORE_BLOCK;
}