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// Copyright 2016 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/animation/animation.h"
#import <Cocoa/Cocoa.h>
#include "base/mac/mac_util.h"
#include "base/message_loop/message_loop_current.h"
// Only available since 10.12.
@interface NSWorkspace (AvailableSinceSierra)
@property(readonly) BOOL accessibilityDisplayShouldReduceMotion;
@end
namespace gfx {
// static
bool Animation::ShouldRenderRichAnimationImpl() {
return !PrefersReducedMotion();
}
// static
bool Animation::ScrollAnimationsEnabledBySystem() {
// Because of sandboxing, OS settings should only be queried from the browser
// process.
DCHECK(base::MessageLoopCurrentForUI::IsSet() ||
base::MessageLoopCurrentForIO::IsSet());
bool enabled = false;
id value = nil;
value = [[NSUserDefaults standardUserDefaults]
objectForKey:@"NSScrollAnimationEnabled"];
if (value)
enabled = [value boolValue];
return enabled;
}
// static
void Animation::UpdatePrefersReducedMotion() {
// prefers_reduced_motion_ should only be modified on the UI thread.
// TODO(crbug.com/927163): DCHECK this assertion once tests are well-behaved.
// We default to assuming that animations are enabled, to avoid impacting the
// experience for users on pre-10.12 systems.
prefers_reduced_motion_ = false;
SEL sel = @selector(accessibilityDisplayShouldReduceMotion);
if ([[NSWorkspace sharedWorkspace] respondsToSelector:sel]) {
prefers_reduced_motion_ =
[[NSWorkspace sharedWorkspace] accessibilityDisplayShouldReduceMotion];
}
}
} // namespace gfx
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