gecko-dev/widget/cocoa/nsLookAndFeel.mm

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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 "nsCocoaFeatures.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/widget/WidgetMessageUtils.h"
#include "SDKDeclarations.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 colorUsingColorSpaceName:NSDeviceRGBColorSpace];
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 colorUsingColorSpaceName:NSDeviceRGBColorSpace];
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
if (@available(macOS 10.14, *)) {
// No-op. macOS 10.14+ supports dark mode, so currentAppearance can be set
// to either Light or Dark.
} else {
// System colors before 10.14 are always Light.
aScheme = ColorScheme::Light;
}
NSAppearance.currentAppearance = NSAppearanceForColorScheme(aScheme);
nscolor color = 0;
switch (aID) {
case ColorID::Infobackground:
color = NS_RGB(0xdd, 0xdd, 0xdd);
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::MozMenuhover:
case ColorID::Selecteditem:
color = GetColorFromNSColor(NSColor.alternateSelectedControlColor);
break;
case ColorID::MozAccentColorForeground:
case ColorID::MozMenuhovertext:
case ColorID::Selecteditemtext:
color = GetColorFromNSColor(NSColor.alternateSelectedControlTextColor);
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;
case ColorID::SpellCheckerUnderline:
color = NS_RGB(0xff, 0, 0);
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::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::Captiontext:
case ColorID::Menutext:
case ColorID::Infotext:
case ColorID::MozMenubartext:
color = GetColorFromNSColor(NSColor.textColor);
break;
case ColorID::Windowtext:
color = GetColorFromNSColor(NSColor.windowFrameTextColor);
break;
case ColorID::Activecaption:
color = GetColorFromNSColor(NSColor.gridColor);
break;
case ColorID::Activeborder:
color = GetColorFromNSColor(NSColor.keyboardFocusIndicatorColor);
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:
color = GetColorFromNSColor(NSColor.controlColor);
if (!NS_GET_A(color)) {
color = GetColorFromNSColor(NSColor.controlBackgroundColor);
}
break;
case ColorID::Buttonhighlight:
color = GetColorFromNSColor(NSColor.selectedControlColor);
break;
case ColorID::Buttonshadow:
color = NS_RGB(0xDC, 0xDC, 0xDC);
break;
case ColorID::Inactivecaptiontext:
color = NS_RGB(0x45, 0x45, 0x45);
break;
case ColorID::Scrollbar:
color = GetColorFromNSColor(NSColor.scrollBarColor);
break;
case ColorID::Threeddarkshadow:
color = NS_RGB(0xDC, 0xDC, 0xDC);
break;
case ColorID::Threedshadow:
color = NS_RGB(0xE0, 0xE0, 0xE0);
break;
case ColorID::Threedface:
color = NS_RGB(0xF0, 0xF0, 0xF0);
break;
case ColorID::Threedhighlight:
color = GetColorFromNSColor(NSColor.highlightColor);
break;
case ColorID::Threedlightshadow:
case ColorID::MozDisabledfield:
color = NS_RGB(0xDA, 0xDA, 0xDA);
break;
case ColorID::Menu:
color = GetColorFromNSColor(NSColor.textBackgroundColor);
break;
case ColorID::Windowframe:
color = GetColorFromNSColor(NSColor.windowFrameColor);
break;
case ColorID::Window: {
if (@available(macOS 10.14, *)) {
color = GetColorFromNSColor(NSColor.windowBackgroundColor);
} else {
// On 10.13 and below, NSColor.windowBackgroundColor is transparent black.
// Use a light grey instead (taken from macOS 11.5).
color = NS_RGB(0xF6, 0xF6, 0xF6);
}
break;
}
case ColorID::Field:
case ColorID::MozCombobox:
case ColorID::Inactiveborder:
case ColorID::Inactivecaption:
case ColorID::MozDialog:
color = GetColorFromNSColor(NSColor.controlBackgroundColor);
break;
case ColorID::Fieldtext:
case ColorID::MozComboboxtext:
case ColorID::Buttontext:
case ColorID::MozButtonhovertext:
case ColorID::MozDialogtext:
case ColorID::MozCellhighlighttext:
case ColorID::MozColheadertext:
case ColorID::MozColheaderhovertext:
color = GetColorFromNSColor(NSColor.controlTextColor);
break;
case ColorID::MozDragtargetzone:
color = GetColorFromNSColor(NSColor.selectedControlColor);
break;
case ColorID::MozMacChromeActive: {
int grey = NativeGreyColorAsInt(toolbarFillGrey, true);
color = NS_RGB(grey, grey, grey);
break;
}
case ColorID::MozMacChromeInactive: {
int grey = NativeGreyColorAsInt(toolbarFillGrey, false);
color = NS_RGB(grey, grey, grey);
break;
}
case ColorID::MozMacFocusring:
color = GetColorFromNSColorWithCustomAlpha(NSColor.keyboardFocusIndicatorColor, 0.48);
break;
case ColorID::MozMacMenushadow:
color = NS_RGB(0xA3, 0xA3, 0xA3);
break;
case ColorID::MozMacMenutextdisable:
color = NS_RGB(0x98, 0x98, 0x98);
break;
case ColorID::MozMacMenutextselect:
color = GetColorFromNSColor(NSColor.selectedMenuItemTextColor);
break;
case ColorID::MozMacDisabledtoolbartext:
case ColorID::Graytext:
color = GetColorFromNSColor(NSColor.disabledControlTextColor);
break;
case ColorID::MozMacMenuselect:
color = GetColorFromNSColor(NSColor.alternateSelectedControlColor);
break;
case ColorID::MozButtondefault:
color = NS_RGB(0xDC, 0xDC, 0xDC);
break;
case ColorID::MozCellhighlight:
case ColorID::MozMacSecondaryhighlight:
// 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;
// The following colors are supposed to be used as font-smoothing background
// colors, in the chrome-only -moz-font-smoothing-background-color property.
// This property is used for text on "vibrant" -moz-appearances.
// The colors have been obtained from the system on 10.14 using the
// program at https://bugzilla.mozilla.org/attachment.cgi?id=9208594 .
// We could obtain them at runtime, but doing so may be expensive and
// requires the use of the private API
// -[NSVisualEffectView fontSmoothingBackgroundColor].
case ColorID::MozMacVibrantTitlebarLight:
color = NS_RGB(0xe6, 0xe6, 0xe6);
break;
case ColorID::MozMacVibrantTitlebarDark:
color = NS_RGB(0x28, 0x28, 0x28);
break;
case ColorID::MozMacTooltip:
case ColorID::MozMacMenupopup:
case ColorID::MozMacMenuitem:
color = aScheme == ColorScheme::Light ? NS_RGB(0xf6, 0xf6, 0xf6) : NS_RGB(0x28, 0x28, 0x28);
break;
case ColorID::MozMacSourceList:
color = aScheme == ColorScheme::Light ? NS_RGB(0xf6, 0xf6, 0xf6) : NS_RGB(0x2d, 0x2d, 0x2d);
break;
case ColorID::MozMacSourceListSelection:
color = aScheme == ColorScheme::Light ? NS_RGB(0xd3, 0xd3, 0xd3) : NS_RGB(0x2d, 0x2d, 0x2d);
break;
case ColorID::MozMacActiveMenuitem:
case ColorID::MozMacActiveSourceListSelection:
case ColorID::MozAccentColor:
color = GetColorFromNSColor(ControlAccentColor());
break;
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::ScrollSliderStyle:
aResult = eScrollThumbStyle_Proportional;
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::DWMCompositor:
case IntID::WindowsClassic:
case IntID::WindowsDefaultTheme:
case IntID::OperatingSystemVersionIdentifier:
aResult = 0;
res = NS_ERROR_NOT_IMPLEMENTED;
break;
case IntID::MacGraphiteTheme:
aResult = NSColor.currentControlTint == NSGraphiteControlTint;
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 = NS_STYLE_TEXT_DECORATION_STYLE_SOLID;
break;
case IntID::SpellCheckerUnderlineStyle:
aResult = NS_STYLE_TEXT_DECORATION_STYLE_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::UseAccessibilityTheme:
aResult = NSWorkspace.sharedWorkspace.accessibilityDisplayShouldIncreaseContrast;
break;
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 on
// 10.14+, false otherwise.
if (@available(macOS 10.14, *)) {
NSAppearanceName aquaOrDarkAqua = [NSApp.effectiveAppearance
bestMatchFromAppearancesWithNames:@[ NSAppearanceNameAqua, NSAppearanceNameDarkAqua ]];
return [aquaOrDarkAqua isEqualToString:NSAppearanceNameDarkAqua];
}
return false;
}
/*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;
// hack for now
if (aID == FontID::MozWindow || aID == FontID::MozDocument) {
aFontStyle.style = mozilla::FontSlantStyle::Normal();
aFontStyle.weight = mozilla::FontWeight::Normal();
aFontStyle.stretch = mozilla::FontStretch::Normal();
aFontStyle.size = 14;
aFontStyle.systemFont = true;
aFontName.AssignLiteral("sans-serif");
return true;
}
// TODO: Add caching? Note that it needs to be thread-safe for stylo use.
nsAutoCString name;
gfxPlatformMac::LookupSystemFont(aID, name, aFontStyle);
aFontName.Append(NS_ConvertUTF8toUTF16(name));
return true;
NS_OBJC_END_TRY_BLOCK_RETURN(false);
}
@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];
if (@available(macOS 10.14, *)) {
[NSWorkspace.sharedWorkspace.notificationCenter
addObserver:self
selector:@selector(mediaQueriesChanged)
name:NSWorkspaceAccessibilityDisplayOptionsDidChangeNotification
object:nil];
} else {
[NSNotificationCenter.defaultCenter
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 {
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