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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 "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() {
[MOZLookAndFeelDynamicChangeObserver startObserving];
}
nsLookAndFeel::~nsLookAndFeel() = default;
void nsLookAndFeel::EnsureInit() {
if (mInitialized) {
return;
}
NS_OBJC_BEGIN_TRY_ABORT_BLOCK
mInitialized = true;
NSWindow* window =
[[NSWindow alloc] initWithContentRect:NSZeroRect
styleMask:NSWindowStyleMaskTitled
backing:NSBackingStoreBuffered
defer:NO];
auto release = MakeScopeExit([&] { [window release]; });
mRtl = window.windowTitlebarLayoutDirection ==
NSUserInterfaceLayoutDirectionRightToLeft;
mTitlebarHeight = std::ceil(window.frame.size.height);
RecordTelemetry();
NS_OBJC_END_TRY_ABORT_BLOCK
}
void nsLookAndFeel::RefreshImpl() {
mInitialized = false;
nsXPLookAndFeel::RefreshImpl();
}
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.
static nscolor 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);
if (aID == ColorID::MozMenuhover &&
!LookAndFeel::GetInt(IntID::PrefersReducedTransparency)) {
// Wash the color a little bit with semi-transparent white to match a
// bit closer the native NSVisualEffectSelection on menus.
color = NS_ComposeColors(
color,
NS_RGBA(255, 255, 255, aScheme == ColorScheme::Light ? 51 : 25));
}
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;
//
//
// 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:
case ColorID::MozDialogtext:
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:
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::MozDialog:
case ColorID::Window:
color = GetColorFromNSColor(aScheme == ColorScheme::Light
? NSColor.windowBackgroundColor
: NSColor.underPageBackgroundColor);
break;
case ColorID::Field:
case ColorID::MozCombobox:
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::MozCellhighlighttext:
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::MozColheadertext:
case ColorID::MozColheaderhovertext:
case ColorID::MozColheaderactivetext:
color = GetColorFromNSColor(NSColor.headerTextColor);
break;
case ColorID::MozColheaderactive:
color = GetColorFromNSColor(
NSColor.unemphasizedSelectedContentBackgroundColor);
break;
case ColorID::MozColheader:
case ColorID::MozColheaderhover:
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:
case ColorID::MozAutofillBackground:
case ColorID::TargetTextBackground:
case ColorID::TargetTextForeground:
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
}
static bool 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];
}
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::SelectTextfieldsOnKeyFocus:
// Select textfield content when focused by kbd
// used by EventStateManager::sTextfieldSelectModel
aResult = 1;
break;
case IntID::SubmenuDelay:
aResult = 200;
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:
EnsureInit();
aResult = mRtl;
break;
case IntID::MacTitlebarHeight:
EnsureInit();
aResult = mTitlebarHeight;
break;
case IntID::AlertNotificationOrigin:
aResult = NS_ALERT_TOP;
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::PanelAnimations:
aResult = 1;
break;
case IntID::FullKeyboardAccess:
aResult = NSApp.isFullKeyboardAccessEnabled;
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::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];
[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