content/browser/accessibility/browser_accessibility_state_impl_mac.mm

// 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 "content/browser/accessibility/browser_accessibility_state_impl.h"

#import <Cocoa/Cocoa.h>

#include "base/metrics/histogram_macros.h"

@interface NSWorkspace (Partials)

@property(readonly) BOOL accessibilityDisplayShouldDifferentiateWithoutColor;
@property(readonly) BOOL accessibilityDisplayShouldIncreaseContrast;
@property(readonly) BOOL accessibilityDisplayShouldReduceTransparency;

@end

// Only available since 10.12.
@interface NSWorkspace (AvailableSinceSierra)
@property(readonly) BOOL accessibilityDisplayShouldReduceMotion;
@end

namespace content {

void BrowserAccessibilityStateImpl::PlatformInitialize() {}

void BrowserAccessibilityStateImpl::UpdatePlatformSpecificHistograms() {
  // NOTE: This function is running on the file thread.
  NSWorkspace* workspace = [NSWorkspace sharedWorkspace];

  SEL sel = @selector(accessibilityDisplayShouldIncreaseContrast);
  if ([workspace respondsToSelector:sel]) {
    UMA_HISTOGRAM_BOOLEAN(
        "Accessibility.Mac.DifferentiateWithoutColor",
        workspace.accessibilityDisplayShouldDifferentiateWithoutColor);
    UMA_HISTOGRAM_BOOLEAN("Accessibility.Mac.IncreaseContrast",
                          workspace.accessibilityDisplayShouldIncreaseContrast);
    UMA_HISTOGRAM_BOOLEAN(
        "Accessibility.Mac.ReduceTransparency",
        workspace.accessibilityDisplayShouldReduceTransparency);

    UMA_HISTOGRAM_BOOLEAN(
        "Accessibility.Mac.FullKeyboardAccessEnabled",
        static_cast<NSApplication*>(NSApp).fullKeyboardAccessEnabled);
  }

  sel = @selector(accessibilityDisplayShouldReduceMotion);
  if ([workspace respondsToSelector:sel]) {
    UMA_HISTOGRAM_BOOLEAN("Accessibility.Mac.ReduceMotion",
                          workspace.accessibilityDisplayShouldReduceMotion);
  }
}

}  // namespace content