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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/base/layout.h"
#include <Cocoa/Cocoa.h>
#if !defined(MAC_OS_X_VERSION_10_7) || \
MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
@interface NSScreen (LionAPI)
- (CGFloat)backingScaleFactor;
@end
@interface NSWindow (LionAPI)
- (CGFloat)backingScaleFactor;
@end
#endif // 10.7
namespace {
float GetScaleFactorScaleForNativeView(gfx::NativeView view) {
if (NSWindow* window = [view window]) {
if ([window respondsToSelector:@selector(backingScaleFactor)])
return [window backingScaleFactor];
return [window userSpaceScaleFactor];
}
NSArray* screens = [NSScreen screens];
if (![screens count])
return 1.0f;
NSScreen* screen = [screens objectAtIndex:0];
if ([screen respondsToSelector:@selector(backingScaleFactor)])
return [screen backingScaleFactor];
return [screen userSpaceScaleFactor];
}
} // namespace
namespace ui {
ScaleFactor GetScaleFactorForNativeView(gfx::NativeView view) {
return GetScaleFactorFromScale(GetScaleFactorScaleForNativeView(view));
}
} // namespace ui
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