triniwiz · Nov 6, 2026 · Nov 7, 2026 · Nov 7, 2026 · Nov 7, 2026 · Nov 7, 2026
diff --git a/packages/core/animation-frame/animation-native.linux.ts b/packages/core/animation-frame/animation-native.linux.ts
@@ -0,0 +1,4 @@
+// GDK frame times are g_get_monotonic_time() microseconds
+export function getTimeInFrameBase(): number {
+	return Number(g_get_monotonic_time()) / 1000;
+}
diff --git a/packages/core/application-settings/index.linux.ts b/packages/core/application-settings/index.linux.ts
@@ -0,0 +1,124 @@
+import { outPointer } from '../utils/gtk.linux';
+import * as Common from './application-settings-common';
+
+// JSON file in $XDG_CONFIG_HOME/<application name>/settings.json
+let cache: Record<string, any> | null = null;
+
+function path(): string {
+	const app = g_get_prgname() || 'nativescript-app';
+	return `${g_get_user_config_dir()}/${app}/settings.json`;
+}
+
+function load(): Record<string, any> {
+	if (cache) {
+		return cache;
+	}
+	const contents = outPointer();
+	cache = {};
+	if (g_file_get_contents(path(), contents, null, null)) {
+		try {
+			cache = JSON.parse(interop.stringFromCString(contents.value)) ?? {};
+		} catch {}
+		g_free(contents.value);
+	}
+	return cache;
+}
+
+function save(): boolean {
+	const file = path();
+	g_mkdir_with_parents(file.substring(0, file.lastIndexOf('/')), 0o700);
+	return !!g_file_set_contents(file, JSON.stringify(load()), -1, null);
+}
+
+function values() {
+	const data = load();
+	return {
+		HasKey: (key: string) => Object.prototype.hasOwnProperty.call(data, key),
+		Lookup: (key: string) => data[key],
+		Insert: (key: string, value: any) => {
+			data[key] = value;
+			save();
+		},
+		Remove: (key: string) => {
+			delete data[key];
+			save();
+		},
+		Clear: () => {
+			for (const key of Object.keys(data)) delete data[key];
+			save();
+		},
+		Keys: () => Object.keys(data),
+	};
+}
+
+export function hasKey(key: string): boolean | undefined {
+	if (!Common.checkKey(key)) {
+		return;
+	}
+
+	return values().HasKey(key);
+}
+
+function getValue(key: string, defaultValue: any): any {
+	if (!Common.checkKey(key)) {
+		return undefined;
+	}
+	const settings = values();
+	return settings.HasKey(key) ? settings.Lookup(key) : defaultValue;
+}
+
+export function getBoolean(key: string, defaultValue?: boolean): boolean | undefined {
+	return getValue(key, defaultValue);
+}
+
+export function getString(key: string, defaultValue?: string): string | undefined {
+	return getValue(key, defaultValue);
+}
+
+export function getNumber(key: string, defaultValue?: number): number | undefined {
+	return getValue(key, defaultValue);
+}
+
+function setValue(key: string, value: any, valueType: string): void {
+	if (!Common.checkKey(key)) {
+		return;
+	}
+	if (!Common.ensureValidValue(value, valueType)) {
+		return;
+	}
+	values().Insert(key, value);
+}
+
+export function setBoolean(key: string, value: boolean): void {
+	setValue(key, value, 'boolean');
+}
+
+export function setString(key: string, value: string): void {
+	setValue(key, value, 'string');
+}
+
+export function setNumber(key: string, value: number): void {
+	setValue(key, value, 'number');
+}
+
+export function remove(key: string): void {
+	if (!Common.checkKey(key)) {
+		return;
+	}
+	const settings = values();
+	if (settings.HasKey(key)) {
+		settings.Remove(key);
+	}
+}
+
+export function clear(): void {
+	values().Clear();
+}
+
+export function flush(): boolean {
+	return save();
+}
+
+export function getAllKeys(): Array<string> {
+	return values().Keys();
+}
diff --git a/packages/core/application/application-common.ts b/packages/core/application/application-common.ts
@@ -10,7 +10,7 @@ import type { View } from '../ui/core/view';
 import type { Frame } from '../ui/frame';
 import type { NavigationEntry } from '../ui/frame/frame-interfaces';
 import type { StyleScope } from '../ui/styling/style-scope';
-import type { AndroidApplication as AndroidApplicationType, iOSApplication as iOSApplicationType, WindowsApplication as WindowsApplicationType } from '.';
+import type { AndroidApplication as AndroidApplicationType, iOSApplication as iOSApplicationType, WindowsApplication as WindowsApplicationType, LinuxApplication as LinuxApplicationType } from '.';
 import type { ApplicationEventData, CssChangedEventData, DiscardedErrorEventData, FontScaleChangedEventData, InitRootViewEventData, LaunchEventData, LoadAppCSSEventData, NativeScriptError, OrientationChangedEventData, SystemAppearanceChangedEventData, LayoutDirectionChangedEventData, UnhandledErrorEventData, SceneOpenURLContextsEventData, SceneContinueUserActivityEventData, ScenePerformActionForShortcutItemEventData } from './application-interfaces';
 import { applyAccessibilityCssToRoot, readyInitAccessibilityCssHelper, readyInitFontScale } from '../accessibility/accessibility-common';
 import { getActiveWindow, getAppMainEntry, getAutoSystemAppearanceChanged, isAppInBackground, setActiveWindow, setAppInBackground, setAppMainEntry, setAutoSystemAppearanceChanged } from './helpers-common';
@@ -831,6 +831,7 @@ export class ApplicationCommon {
 			ios: this.ios,
 			android: this.android,
 			windows: this.windows,
+			linux: this.linux,
 			...additionalLanchEventData,
 		};
 		this.notify(launchArgs);
@@ -1177,6 +1178,10 @@ export class ApplicationCommon {
 		return undefined;
 	}
 
+	get linux(): LinuxApplicationType {
+		return undefined;
+	}
+
 	get AndroidApplication() {
 		return this.android;
 	}

diff --git a/packages/core/application/application.d.ts b/packages/core/application/application.d.ts
@@ -376,13 +376,25 @@ export class iOSApplication extends ApplicationCommon {
 	shouldDelayLaunchEvent: boolean;
 }
 export class WindowsApplication extends ApplicationCommon {
-
 	getRootView(): View;
 
 	run(entry?: string | NavigationEntry): void;
 
 	getNativeApplication(): Microsoft.UI.Xaml.Application;
+}
+
+/**
+ * The Linux (GTK 4) application.
+ */
+export class LinuxApplication extends ApplicationCommon {
+	getRootView(): View;
+
+	run(entry?: string | NavigationEntry): void;
 
+	/**
+	 * The `GtkApplication*`.
+	 */
+	getNativeApplication(): interop.Pointer;
 }
 
 export const VALID_FONT_SCALES: number[];