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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "AppearanceOverride.h"
+#include "mozilla/widget/ThemeChangeKind.h"
+#include "nsLookAndFeel.h"
+#include "nsCocoaFeatures.h"
+#include "nsNativeThemeColors.h"
+#include "nsStyleConsts.h"
+#include "nsIContent.h"
+#include "gfxFont.h"
+#include "gfxFontConstants.h"
+#include "gfxPlatformMac.h"
+#include "nsCSSColorUtils.h"
+#include "mozilla/FontPropertyTypes.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/StaticPrefs_widget.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/widget/WidgetMessageUtils.h"
+
+#import <Cocoa/Cocoa.h>
+#import <AppKit/NSColor.h>
+
+// This must be included last:
+#include "nsObjCExceptions.h"
+
+using namespace mozilla;
+
+@interface MOZLookAndFeelDynamicChangeObserver : NSObject
++ (void)startObserving;
+@end
+
+nsLookAndFeel::nsLookAndFeel() = default;
+
+nsLookAndFeel::~nsLookAndFeel() = default;
+
+void nsLookAndFeel::NativeInit() {
+ NS_OBJC_BEGIN_TRY_ABORT_BLOCK
+
+ [MOZLookAndFeelDynamicChangeObserver startObserving];
+ RecordTelemetry();
+
+ NS_OBJC_END_TRY_ABORT_BLOCK
+}
+
+static nscolor GetColorFromNSColor(NSColor* aColor) {
+ NSColor* deviceColor =
+ [aColor colorUsingColorSpace:[NSColorSpace deviceRGBColorSpace]];
+ return NS_RGBA((unsigned int)(deviceColor.redComponent * 255.0),
+ (unsigned int)(deviceColor.greenComponent * 255.0),
+ (unsigned int)(deviceColor.blueComponent * 255.0),
+ (unsigned int)(deviceColor.alphaComponent * 255.0));
+}
+
+static nscolor GetColorFromNSColorWithCustomAlpha(NSColor* aColor,
+ float alpha) {
+ NSColor* deviceColor =
+ [aColor colorUsingColorSpace:[NSColorSpace deviceRGBColorSpace]];
+ return NS_RGBA((unsigned int)(deviceColor.redComponent * 255.0),
+ (unsigned int)(deviceColor.greenComponent * 255.0),
+ (unsigned int)(deviceColor.blueComponent * 255.0),
+ (unsigned int)(alpha * 255.0));
+}
+
+// Turns an opaque selection color into a partially transparent selection color,
+// which usually leads to better contrast with the text color and which should
+// look more visually appealing in most contexts.
+// The idea is that the text and its regular, non-selected background are
+// usually chosen in such a way that they contrast well. Making the selection
+// color partially transparent causes the selection color to mix with the text's
+// regular background, so the end result will often have better contrast with
+// the text than an arbitrary opaque selection color.
+// The motivating example for this is the light selection color on dark web
+// pages: White text on a light blue selection color has very bad contrast,
+// whereas white text on dark blue (which what you get if you mix
+// partially-transparent light blue with the black textbox background) has much
+// better contrast.
+nscolor nsLookAndFeel::ProcessSelectionBackground(nscolor aColor,
+ ColorScheme aScheme) {
+ if (aScheme == ColorScheme::Dark) {
+ // When we use a dark selection color, we do not change alpha because we do
+ // not use dark selection in content. The dark system color is appropriate
+ // for Firefox UI without needing to adjust its alpha.
+ return aColor;
+ }
+ uint16_t hue, sat, value;
+ uint8_t alpha;
+ nscolor resultColor = aColor;
+ NS_RGB2HSV(resultColor, hue, sat, value, alpha);
+ int factor = 2;
+ alpha = alpha / factor;
+ if (sat > 0) {
+ // The color is not a shade of grey, restore the saturation taken away by
+ // the transparency.
+ sat = mozilla::clamped(sat * factor, 0, 255);
+ } else {
+ // The color is a shade of grey, find the value that looks equivalent
+ // on a white background with the given opacity.
+ value = mozilla::clamped(255 - (255 - value) * factor, 0, 255);
+ }
+ NS_HSV2RGB(resultColor, hue, sat, value, alpha);
+ return resultColor;
+}
+
+nsresult nsLookAndFeel::NativeGetColor(ColorID aID, ColorScheme aScheme,
+ nscolor& aColor) {
+ NS_OBJC_BEGIN_TRY_ABORT_BLOCK
+
+ NSAppearance.currentAppearance = NSAppearanceForColorScheme(aScheme);
+
+ nscolor color = 0;
+ switch (aID) {
+ case ColorID::Infobackground:
+ color = aScheme == ColorScheme::Light
+ ? NS_RGB(0xdd, 0xdd, 0xdd)
+ : GetColorFromNSColor(NSColor.windowBackgroundColor);
+ break;
+ case ColorID::Highlight:
+ color = ProcessSelectionBackground(
+ GetColorFromNSColor(NSColor.selectedTextBackgroundColor), aScheme);
+ break;
+ // This is used to gray out the selection when it's not focused. Used with
+ // nsISelectionController::SELECTION_DISABLED.
+ case ColorID::TextSelectDisabledBackground:
+ color = ProcessSelectionBackground(
+ GetColorFromNSColor(NSColor.secondarySelectedControlColor), aScheme);
+ break;
+ case ColorID::MozMenuhoverdisabled:
+ aColor = NS_TRANSPARENT;
+ break;
+ case ColorID::Accentcolor:
+ color = GetColorFromNSColor(NSColor.controlAccentColor);
+ break;
+ case ColorID::MozMenuhover:
+ case ColorID::Selecteditem:
+ color = GetColorFromNSColor(NSColor.selectedContentBackgroundColor);
+ break;
+ case ColorID::Accentcolortext:
+ case ColorID::MozMenuhovertext:
+ case ColorID::Selecteditemtext:
+ color = GetColorFromNSColor(NSColor.selectedMenuItemTextColor);
+ break;
+ case ColorID::IMESelectedRawTextBackground:
+ case ColorID::IMESelectedConvertedTextBackground:
+ case ColorID::IMERawInputBackground:
+ case ColorID::IMEConvertedTextBackground:
+ color = NS_TRANSPARENT;
+ break;
+ case ColorID::IMESelectedRawTextForeground:
+ case ColorID::IMESelectedConvertedTextForeground:
+ case ColorID::IMERawInputForeground:
+ case ColorID::IMEConvertedTextForeground:
+ case ColorID::Highlighttext:
+ color = NS_SAME_AS_FOREGROUND_COLOR;
+ break;
+ case ColorID::IMERawInputUnderline:
+ case ColorID::IMEConvertedTextUnderline:
+ color = NS_40PERCENT_FOREGROUND_COLOR;
+ break;
+ case ColorID::IMESelectedRawTextUnderline:
+ case ColorID::IMESelectedConvertedTextUnderline:
+ color = NS_SAME_AS_FOREGROUND_COLOR;
+ break;
+
+ //
+ // css2 system colors http://www.w3.org/TR/REC-CSS2/ui.html#system-colors
+ //
+ // It's really hard to effectively map these to the Appearance Manager
+ // properly, since they are modeled word for word after the win32 system
+ // colors and don't have any real counterparts in the Mac world. I'm sure
+ // we'll be tweaking these for years to come.
+ //
+ // Thanks to mpt26@student.canterbury.ac.nz for the hardcoded values that
+ // form the defaults
+ // if querying the Appearance Manager fails ;)
+ //
+ case ColorID::MozMacDefaultbuttontext:
+ color = NS_RGB(0xFF, 0xFF, 0xFF);
+ break;
+ case ColorID::MozSidebar:
+ color = aScheme == ColorScheme::Light ? NS_RGB(0xf6, 0xf6, 0xf6)
+ : NS_RGB(0x2d, 0x2d, 0x2d);
+ break;
+ case ColorID::MozSidebarborder:
+ // hsla(240, 5%, 5%, .1)
+ color = NS_RGBA(12, 12, 13, 26);
+ break;
+ case ColorID::MozButtonactivetext:
+ // Pre-macOS 12, pressed buttons were filled with the highlight color and
+ // the text was white. Starting with macOS 12, pressed (non-default)
+ // buttons are filled with medium gray and the text color is the same as
+ // in the non-pressed state.
+ color = nsCocoaFeatures::OnMontereyOrLater()
+ ? GetColorFromNSColor(NSColor.controlTextColor)
+ : NS_RGB(0xFF, 0xFF, 0xFF);
+ break;
+ case ColorID::Windowtext:
+ color = GetColorFromNSColor(NSColor.windowFrameTextColor);
+ break;
+ case ColorID::Appworkspace:
+ color = NS_RGB(0xFF, 0xFF, 0xFF);
+ break;
+ case ColorID::Background:
+ color = NS_RGB(0x63, 0x63, 0xCE);
+ break;
+ case ColorID::Buttonface:
+ case ColorID::MozButtonhoverface:
+ case ColorID::MozButtonactiveface:
+ case ColorID::MozButtondisabledface:
+ case ColorID::MozColheader:
+ case ColorID::MozColheaderhover:
+ case ColorID::MozColheaderactive:
+ color = GetColorFromNSColor(NSColor.controlColor);
+ if (!NS_GET_A(color)) {
+ color = GetColorFromNSColor(NSColor.controlBackgroundColor);
+ }
+ break;
+ case ColorID::Buttonhighlight:
+ color = GetColorFromNSColor(NSColor.selectedControlColor);
+ break;
+ case ColorID::Scrollbar:
+ color = GetColorFromNSColor(NSColor.scrollBarColor);
+ break;
+ case ColorID::Threedhighlight:
+ color = GetColorFromNSColor(NSColor.highlightColor);
+ break;
+ case ColorID::Buttonshadow:
+ case ColorID::Threeddarkshadow:
+ color = aScheme == ColorScheme::Dark ? *GenericDarkColor(aID)
+ : NS_RGB(0xDC, 0xDC, 0xDC);
+ break;
+ case ColorID::Threedshadow:
+ color = aScheme == ColorScheme::Dark ? *GenericDarkColor(aID)
+ : NS_RGB(0xE0, 0xE0, 0xE0);
+ break;
+ case ColorID::Threedface:
+ color = aScheme == ColorScheme::Dark ? *GenericDarkColor(aID)
+ : NS_RGB(0xF0, 0xF0, 0xF0);
+ break;
+ case ColorID::Threedlightshadow:
+ case ColorID::Buttonborder:
+ case ColorID::MozDisabledfield:
+ color = aScheme == ColorScheme::Dark ? *GenericDarkColor(aID)
+ : NS_RGB(0xDA, 0xDA, 0xDA);
+ break;
+ case ColorID::Menu:
+ // Hand-picked from Sonoma because there doesn't seem to be any
+ // appropriate menu system color.
+ color = aScheme == ColorScheme::Dark ? NS_RGB(0x36, 0x36, 0x39)
+ : NS_RGB(0xeb, 0xeb, 0xeb);
+ break;
+ case ColorID::Windowframe:
+ color = GetColorFromNSColor(NSColor.windowFrameColor);
+ break;
+ case ColorID::Window: {
+ color = GetColorFromNSColor(NSColor.windowBackgroundColor);
+ break;
+ }
+ case ColorID::Field:
+ case ColorID::MozCombobox:
+ case ColorID::MozDialog:
+ color = GetColorFromNSColor(NSColor.controlBackgroundColor);
+ break;
+ case ColorID::Fieldtext:
+ case ColorID::MozComboboxtext:
+ case ColorID::Buttontext:
+ case ColorID::MozButtonhovertext:
+ case ColorID::Menutext:
+ case ColorID::Infotext:
+ case ColorID::MozDialogtext:
+ case ColorID::MozCellhighlighttext:
+ case ColorID::MozColheadertext:
+ case ColorID::MozColheaderhovertext:
+ case ColorID::MozColheaderactivetext:
+ case ColorID::MozSidebartext:
+ color = GetColorFromNSColor(NSColor.controlTextColor);
+ break;
+ case ColorID::MozMacFocusring:
+ color = GetColorFromNSColorWithCustomAlpha(
+ NSColor.keyboardFocusIndicatorColor, 0.48);
+ break;
+ case ColorID::MozMacDisabledtoolbartext:
+ case ColorID::Graytext:
+ color = GetColorFromNSColor(NSColor.disabledControlTextColor);
+ break;
+ case ColorID::MozCellhighlight:
+ // For inactive list selection
+ color = GetColorFromNSColor(NSColor.secondarySelectedControlColor);
+ break;
+ case ColorID::MozEventreerow:
+ // Background color of even list rows.
+ color =
+ GetColorFromNSColor(NSColor.controlAlternatingRowBackgroundColors[0]);
+ break;
+ case ColorID::MozOddtreerow:
+ // Background color of odd list rows.
+ color =
+ GetColorFromNSColor(NSColor.controlAlternatingRowBackgroundColors[1]);
+ break;
+ case ColorID::MozNativehyperlinktext:
+ color = GetColorFromNSColor(NSColor.linkColor);
+ break;
+ case ColorID::MozNativevisitedhyperlinktext:
+ color = GetColorFromNSColor(NSColor.systemPurpleColor);
+ break;
+ case ColorID::MozHeaderbartext:
+ case ColorID::MozHeaderbarinactivetext:
+ case ColorID::Inactivecaptiontext:
+ case ColorID::Captiontext:
+ aColor = GetColorFromNSColor(NSColor.textColor);
+ return NS_OK;
+ case ColorID::MozHeaderbar:
+ case ColorID::MozHeaderbarinactive:
+ case ColorID::Inactivecaption:
+ case ColorID::Activecaption:
+ // This has better contrast than the stand-in colors.
+ aColor = GetColorFromNSColor(NSColor.windowBackgroundColor);
+ return NS_OK;
+ case ColorID::Marktext:
+ case ColorID::Mark:
+ case ColorID::SpellCheckerUnderline:
+ case ColorID::Activeborder:
+ case ColorID::Inactiveborder:
+ aColor = GetStandinForNativeColor(aID, aScheme);
+ return NS_OK;
+ default:
+ aColor = NS_RGB(0xff, 0xff, 0xff);
+ return NS_ERROR_FAILURE;
+ }
+
+ aColor = color;
+ return NS_OK;
+
+ NS_OBJC_END_TRY_ABORT_BLOCK
+}
+
+nsresult nsLookAndFeel::NativeGetInt(IntID aID, int32_t& aResult) {
+ NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
+
+ nsresult res = NS_OK;
+
+ switch (aID) {
+ case IntID::ScrollButtonLeftMouseButtonAction:
+ aResult = 0;
+ break;
+ case IntID::ScrollButtonMiddleMouseButtonAction:
+ case IntID::ScrollButtonRightMouseButtonAction:
+ aResult = 3;
+ break;
+ case IntID::CaretBlinkTime:
+ aResult = 567;
+ break;
+ case IntID::CaretWidth:
+ aResult = 1;
+ break;
+ case IntID::ShowCaretDuringSelection:
+ aResult = 0;
+ break;
+ case IntID::SelectTextfieldsOnKeyFocus:
+ // Select textfield content when focused by kbd
+ // used by EventStateManager::sTextfieldSelectModel
+ aResult = 1;
+ break;
+ case IntID::SubmenuDelay:
+ aResult = 200;
+ break;
+ case IntID::TooltipDelay:
+ aResult = 500;
+ break;
+ case IntID::MenusCanOverlapOSBar:
+ // xul popups are not allowed to overlap the menubar.
+ aResult = 0;
+ break;
+ case IntID::SkipNavigatingDisabledMenuItem:
+ aResult = 1;
+ break;
+ case IntID::DragThresholdX:
+ case IntID::DragThresholdY:
+ aResult = 4;
+ break;
+ case IntID::ScrollArrowStyle:
+ aResult = eScrollArrow_None;
+ break;
+ case IntID::UseOverlayScrollbars:
+ case IntID::AllowOverlayScrollbarsOverlap:
+ aResult = NSScroller.preferredScrollerStyle == NSScrollerStyleOverlay;
+ break;
+ case IntID::ScrollbarDisplayOnMouseMove:
+ aResult = 0;
+ break;
+ case IntID::ScrollbarFadeBeginDelay:
+ aResult = 450;
+ break;
+ case IntID::ScrollbarFadeDuration:
+ aResult = 200;
+ break;
+ case IntID::TreeOpenDelay:
+ aResult = 1000;
+ break;
+ case IntID::TreeCloseDelay:
+ aResult = 1000;
+ break;
+ case IntID::TreeLazyScrollDelay:
+ aResult = 150;
+ break;
+ case IntID::TreeScrollDelay:
+ aResult = 100;
+ break;
+ case IntID::TreeScrollLinesMax:
+ aResult = 3;
+ break;
+ case IntID::MacBigSurTheme:
+ aResult = nsCocoaFeatures::OnBigSurOrLater();
+ break;
+ case IntID::MacRTL:
+ aResult = IsSystemOrientationRTL();
+ break;
+ case IntID::AlertNotificationOrigin:
+ aResult = NS_ALERT_TOP;
+ break;
+ case IntID::TabFocusModel:
+ aResult = [NSApp isFullKeyboardAccessEnabled]
+ ? nsIContent::eTabFocus_any
+ : nsIContent::eTabFocus_textControlsMask;
+ break;
+ case IntID::ScrollToClick: {
+ aResult = [[NSUserDefaults standardUserDefaults]
+ boolForKey:@"AppleScrollerPagingBehavior"];
+ } break;
+ case IntID::ChosenMenuItemsShouldBlink:
+ aResult = 1;
+ break;
+ case IntID::IMERawInputUnderlineStyle:
+ case IntID::IMEConvertedTextUnderlineStyle:
+ case IntID::IMESelectedRawTextUnderlineStyle:
+ case IntID::IMESelectedConvertedTextUnderline:
+ aResult = static_cast<int32_t>(StyleTextDecorationStyle::Solid);
+ break;
+ case IntID::SpellCheckerUnderlineStyle:
+ aResult = static_cast<int32_t>(StyleTextDecorationStyle::Dotted);
+ break;
+ case IntID::ScrollbarButtonAutoRepeatBehavior:
+ aResult = 0;
+ break;
+ case IntID::SwipeAnimationEnabled:
+ aResult = NSEvent.isSwipeTrackingFromScrollEventsEnabled;
+ break;
+ case IntID::ContextMenuOffsetVertical:
+ aResult = -6;
+ break;
+ case IntID::ContextMenuOffsetHorizontal:
+ aResult = 1;
+ break;
+ case IntID::SystemUsesDarkTheme:
+ aResult = SystemWantsDarkTheme();
+ break;
+ case IntID::PrefersReducedMotion:
+ aResult =
+ NSWorkspace.sharedWorkspace.accessibilityDisplayShouldReduceMotion;
+ break;
+ case IntID::PrefersReducedTransparency:
+ aResult = NSWorkspace.sharedWorkspace
+ .accessibilityDisplayShouldReduceTransparency;
+ break;
+ case IntID::InvertedColors:
+ aResult =
+ NSWorkspace.sharedWorkspace.accessibilityDisplayShouldInvertColors;
+ break;
+ case IntID::UseAccessibilityTheme:
+ aResult = NSWorkspace.sharedWorkspace
+ .accessibilityDisplayShouldIncreaseContrast;
+ break;
+ case IntID::VideoDynamicRange: {
+ // If the platform says it supports HDR, then we claim to support
+ // video-dynamic-range.
+ gfxPlatform* platform = gfxPlatform::GetPlatform();
+ MOZ_ASSERT(platform);
+ aResult = platform->SupportsHDR();
+ break;
+ }
+ case IntID::PanelAnimations:
+ aResult = 1;
+ break;
+ default:
+ aResult = 0;
+ res = NS_ERROR_FAILURE;
+ }
+ return res;
+
+ NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE);
+}
+
+nsresult nsLookAndFeel::NativeGetFloat(FloatID aID, float& aResult) {
+ NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
+
+ nsresult res = NS_OK;
+
+ switch (aID) {
+ case FloatID::IMEUnderlineRelativeSize:
+ aResult = 2.0f;
+ break;
+ case FloatID::SpellCheckerUnderlineRelativeSize:
+ aResult = 2.0f;
+ break;
+ case FloatID::CursorScale: {
+ id uaDefaults = [[NSUserDefaults alloc]
+ initWithSuiteName:@"com.apple.universalaccess"];
+ float f = [uaDefaults floatForKey:@"mouseDriverCursorSize"];
+ [uaDefaults release];
+ aResult = f > 0.0 ? f : 1.0; // default to 1.0 if value not available
+ break;
+ }
+ default:
+ aResult = -1.0;
+ res = NS_ERROR_FAILURE;
+ }
+
+ return res;
+
+ NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE);
+}
+
+bool nsLookAndFeel::SystemWantsDarkTheme() {
+ // This returns true if the macOS system appearance is set to dark mode, false
+ // otherwise.
+ NSAppearanceName aquaOrDarkAqua =
+ [NSApp.effectiveAppearance bestMatchFromAppearancesWithNames:@[
+ NSAppearanceNameAqua, NSAppearanceNameDarkAqua
+ ]];
+ return [aquaOrDarkAqua isEqualToString:NSAppearanceNameDarkAqua];
+}
+
+/*static*/
+bool nsLookAndFeel::IsSystemOrientationRTL() {
+ NSWindow* window =
+ [[NSWindow alloc] initWithContentRect:NSZeroRect
+ styleMask:NSWindowStyleMaskBorderless
+ backing:NSBackingStoreBuffered
+ defer:NO];
+ auto direction = window.windowTitlebarLayoutDirection;
+ [window release];
+ return direction == NSUserInterfaceLayoutDirectionRightToLeft;
+}
+
+bool nsLookAndFeel::NativeGetFont(FontID aID, nsString& aFontName,
+ gfxFontStyle& aFontStyle) {
+ NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
+
+ nsAutoCString name;
+ gfxPlatformMac::LookupSystemFont(aID, name, aFontStyle);
+ aFontName.Append(NS_ConvertUTF8toUTF16(name));
+
+ return true;
+
+ NS_OBJC_END_TRY_BLOCK_RETURN(false);
+}
+
+void nsLookAndFeel::RecordAccessibilityTelemetry() {
+ if ([[NSWorkspace sharedWorkspace]
+ respondsToSelector:@selector
+ (accessibilityDisplayShouldInvertColors)]) {
+ bool val =
+ [[NSWorkspace sharedWorkspace] accessibilityDisplayShouldInvertColors];
+ Telemetry::ScalarSet(Telemetry::ScalarID::A11Y_INVERT_COLORS, val);
+ }
+}
+
+@implementation MOZLookAndFeelDynamicChangeObserver
+
++ (void)startObserving {
+ static MOZLookAndFeelDynamicChangeObserver* gInstance = nil;
+ if (!gInstance) {
+ gInstance = [[MOZLookAndFeelDynamicChangeObserver alloc] init]; // leaked
+ }
+}
+
+- (instancetype)init {
+ self = [super init];
+
+ [NSNotificationCenter.defaultCenter
+ addObserver:self
+ selector:@selector(colorsChanged)
+ name:NSControlTintDidChangeNotification
+ object:nil];
+ [NSNotificationCenter.defaultCenter
+ addObserver:self
+ selector:@selector(colorsChanged)
+ name:NSSystemColorsDidChangeNotification
+ object:nil];
+
+ [NSWorkspace.sharedWorkspace.notificationCenter
+ addObserver:self
+ selector:@selector(mediaQueriesChanged)
+ name:NSWorkspaceAccessibilityDisplayOptionsDidChangeNotification
+ object:nil];
+
+ [NSNotificationCenter.defaultCenter
+ addObserver:self
+ selector:@selector(scrollbarsChanged)
+ name:NSPreferredScrollerStyleDidChangeNotification
+ object:nil];
+ [NSDistributedNotificationCenter.defaultCenter
+ addObserver:self
+ selector:@selector(scrollbarsChanged)
+ name:@"AppleAquaScrollBarVariantChanged"
+ object:nil
+ suspensionBehavior:NSNotificationSuspensionBehaviorDeliverImmediately];
+ [NSDistributedNotificationCenter.defaultCenter
+ addObserver:self
+ selector:@selector(cachedValuesChanged)
+ name:@"AppleNoRedisplayAppearancePreferenceChanged"
+ object:nil
+ suspensionBehavior:NSNotificationSuspensionBehaviorCoalesce];
+ [NSDistributedNotificationCenter.defaultCenter
+ addObserver:self
+ selector:@selector(cachedValuesChanged)
+ name:@"com.apple.KeyboardUIModeDidChange"
+ object:nil
+ suspensionBehavior:NSNotificationSuspensionBehaviorDeliverImmediately];
+
+ [MOZGlobalAppearance.sharedInstance addObserver:self
+ forKeyPath:@"effectiveAppearance"
+ options:0
+ context:nil];
+ [NSApp addObserver:self
+ forKeyPath:@"effectiveAppearance"
+ options:0
+ context:nil];
+
+ return self;
+}
+
+- (void)observeValueForKeyPath:(NSString*)keyPath
+ ofObject:(id)object
+ change:(NSDictionary<NSKeyValueChangeKey, id>*)change
+ context:(void*)context {
+ if ([keyPath isEqualToString:@"effectiveAppearance"]) {
+ [self entireThemeChanged];
+ } else {
+ [super observeValueForKeyPath:keyPath
+ ofObject:object
+ change:change
+ context:context];
+ }
+}
+
+- (void)entireThemeChanged {
+ LookAndFeel::NotifyChangedAllWindows(widget::ThemeChangeKind::StyleAndLayout);
+}
+
+- (void)scrollbarsChanged {
+ LookAndFeel::NotifyChangedAllWindows(widget::ThemeChangeKind::StyleAndLayout);
+}
+
+- (void)mediaQueriesChanged {
+ // Changing`Invert Colors` sends
+ // AccessibilityDisplayOptionsDidChangeNotifications. We monitor that setting
+ // via telemetry, so call into that recording method here.
+ nsLookAndFeel::RecordAccessibilityTelemetry();
+ LookAndFeel::NotifyChangedAllWindows(
+ widget::ThemeChangeKind::MediaQueriesOnly);
+}
+
+- (void)colorsChanged {
+ LookAndFeel::NotifyChangedAllWindows(widget::ThemeChangeKind::Style);
+}
+
+- (void)cachedValuesChanged {
+ // We only need to re-cache (and broadcast) updated LookAndFeel values, so
+ // that they're up-to-date the next time they're queried. No further change
+ // handling is needed.
+ // TODO: Add a change hint for this which avoids the unnecessary media query
+ // invalidation.
+ LookAndFeel::NotifyChangedAllWindows(
+ widget::ThemeChangeKind::MediaQueriesOnly);
+}
+@end