1 files changed, 79 insertions, 0 deletions
diff --git a/llama.cpp/tools/server/webui/src/lib/components/ui/sidebar/context.svelte.ts b/llama.cpp/tools/server/webui/src/lib/components/ui/sidebar/context.svelte.ts
new file mode 100644
index 0000000..6fa2aa3
--- /dev/null
+++ b/llama.cpp/tools/server/webui/src/lib/components/ui/sidebar/context.svelte.ts
@@ -0,0 +1,79 @@
+import { IsMobile } from '$lib/hooks/is-mobile.svelte.js';
+import { getContext, setContext } from 'svelte';
+import { SIDEBAR_KEYBOARD_SHORTCUT } from './constants.js';
+
+type Getter<T> = () => T;
+
+export type SidebarStateProps = {
+	/**
+	 * A getter function that returns the current open state of the sidebar.
+	 * We use a getter function here to support `bind:open` on the `Sidebar.Provider`
+	 * component.
+	 */
+	open: Getter<boolean>;
+
+	/**
+	 * A function that sets the open state of the sidebar. To support `bind:open`, we need
+	 * a source of truth for changing the open state to ensure it will be synced throughout
+	 * the sub-components and any `bind:` references.
+	 */
+	setOpen: (open: boolean) => void;
+};
+
+class SidebarState {
+	readonly props: SidebarStateProps;
+	open = $derived.by(() => this.props.open());
+	openMobile = $state(false);
+	setOpen: SidebarStateProps['setOpen'];
+	#isMobile: IsMobile;
+	state = $derived.by(() => (this.open ? 'expanded' : 'collapsed'));
+
+	constructor(props: SidebarStateProps) {
+		this.setOpen = props.setOpen;
+		this.#isMobile = new IsMobile();
+		this.props = props;
+	}
+
+	// Convenience getter for checking if the sidebar is mobile
+	// without this, we would need to use `sidebar.isMobile.current` everywhere
+	get isMobile() {
+		return this.#isMobile.current;
+	}
+
+	// Event handler to apply to the `<svelte:window>`
+	handleShortcutKeydown = (e: KeyboardEvent) => {
+		if (e.key === SIDEBAR_KEYBOARD_SHORTCUT && (e.metaKey || e.ctrlKey)) {
+			e.preventDefault();
+			this.toggle();
+		}
+	};
+
+	setOpenMobile = (value: boolean) => {
+		this.openMobile = value;
+	};
+
+	toggle = () => {
+		return this.#isMobile.current ? (this.openMobile = !this.openMobile) : this.setOpen(!this.open);
+	};
+}
+
+const SYMBOL_KEY = 'scn-sidebar';
+
+/**
+ * Instantiates a new `SidebarState` instance and sets it in the context.
+ *
+ * @param props The constructor props for the `SidebarState` class.
+ * @returns  The `SidebarState` instance.
+ */
+export function setSidebar(props: SidebarStateProps): SidebarState {
+	return setContext(Symbol.for(SYMBOL_KEY), new SidebarState(props));
+}
+
+/**
+ * Retrieves the `SidebarState` instance from the context. This is a class instance,
+ * so you cannot destructure it.
+ * @returns The `SidebarState` instance.
+ */
+export function useSidebar(): SidebarState {
+	return getContext(Symbol.for(SYMBOL_KEY));
+}