Add fuzzy search to settings list

packages/coding-agent/src/modes/interactive/components/settings-selector.ts

@@ -309,6 +309,7 @@ export class SettingsSelectorComponent extends Container {
 				}
 			},
 			callbacks.onCancel,
+			{ enableSearch: true },
 		);
 
 		this.addChild(this.settingsList);

packages/tui/src/components/settings-list.ts

@@ -1,6 +1,8 @@
+import { fuzzyFilter } from "../fuzzy.js";
 import { getEditorKeybindings } from "../keybindings.js";
 import type { Component } from "../tui.js";
 import { truncateToWidth, visibleWidth, wrapTextWithAnsi } from "../utils.js";
+import { Input } from "./input.js";
 
 export interface SettingItem {
 	/** Unique identifier for this setting */
@@ -25,13 +27,20 @@ export interface SettingsListTheme {
 	hint: (text: string) => string;
 }
 
+export interface SettingsListOptions {
+	enableSearch?: boolean;
+}
+
 export class SettingsList implements Component {
 	private items: SettingItem[];
+	private filteredItems: SettingItem[];
 	private theme: SettingsListTheme;
 	private selectedIndex = 0;
 	private maxVisible: number;
 	private onChange: (id: string, newValue: string) => void;
 	private onCancel: () => void;
+	private searchInput?: Input;
+	private searchEnabled: boolean;
 
 	// Submenu state
 	private submenuComponent: Component | null = null;
@@ -43,12 +52,18 @@ export class SettingsList implements Component {
 		theme: SettingsListTheme,
 		onChange: (id: string, newValue: string) => void,
 		onCancel: () => void,
+		options: SettingsListOptions = {},
 	) {
 		this.items = items;
+		this.filteredItems = items;
 		this.maxVisible = maxVisible;
 		this.theme = theme;
 		this.onChange = onChange;
 		this.onCancel = onCancel;
+		this.searchEnabled = options.enableSearch ?? false;
+		if (this.searchEnabled) {
+			this.searchInput = new Input();
+		}
 	}
 
 	/** Update an item's currentValue */
@@ -75,24 +90,39 @@ export class SettingsList implements Component {
 	private renderMainList(width: number): string[] {
 		const lines: string[] = [];
 
+		if (this.searchEnabled && this.searchInput) {
+			lines.push(...this.searchInput.render(width));
+			lines.push("");
+		}
+
 		if (this.items.length === 0) {
 			lines.push(this.theme.hint("  No settings available"));
+			if (this.searchEnabled) {
+				this.addHintLine(lines);
+			}
+			return lines;
+		}
+
+		const displayItems = this.searchEnabled ? this.filteredItems : this.items;
+		if (displayItems.length === 0) {
+			lines.push(this.theme.hint("  No matching settings"));
+			this.addHintLine(lines);
 			return lines;
 		}
 
 		// Calculate visible range with scrolling
 		const startIndex = Math.max(
 			0,
-			Math.min(this.selectedIndex - Math.floor(this.maxVisible / 2), this.items.length - this.maxVisible),
+			Math.min(this.selectedIndex - Math.floor(this.maxVisible / 2), displayItems.length - this.maxVisible),
 		);
-		const endIndex = Math.min(startIndex + this.maxVisible, this.items.length);
+		const endIndex = Math.min(startIndex + this.maxVisible, displayItems.length);
 
 		// Calculate max label width for alignment
 		const maxLabelWidth = Math.min(30, Math.max(...this.items.map((item) => visibleWidth(item.label))));
 
 		// Render visible items
 		for (let i = startIndex; i < endIndex; i++) {
-			const item = this.items[i];
+			const item = displayItems[i];
 			if (!item) continue;
 
 			const isSelected = i === this.selectedIndex;
@@ -114,13 +144,13 @@ export class SettingsList implements Component {
 		}
 
 		// Add scroll indicator if needed
-		if (startIndex > 0 || endIndex < this.items.length) {
-			const scrollText = `  (${this.selectedIndex + 1}/${this.items.length})`;
+		if (startIndex > 0 || endIndex < displayItems.length) {
+			const scrollText = `  (${this.selectedIndex + 1}/${displayItems.length})`;
 			lines.push(this.theme.hint(truncateToWidth(scrollText, width - 2, "")));
 		}
 
 		// Add description for selected item
-		const selectedItem = this.items[this.selectedIndex];
+		const selectedItem = displayItems[this.selectedIndex];
 		if (selectedItem?.description) {
 			lines.push("");
 			const wrappedDesc = wrapTextWithAnsi(selectedItem.description, width - 4);
@@ -130,8 +160,7 @@ export class SettingsList implements Component {
 		}
 
 		// Add hint
-		lines.push("");
-		lines.push(this.theme.hint("  Enter/Space to change · Esc to cancel"));
+		this.addHintLine(lines);
 
 		return lines;
 	}
@@ -146,19 +175,29 @@ export class SettingsList implements Component {
 
 		// Main list input handling
 		const kb = getEditorKeybindings();
+		const displayItems = this.searchEnabled ? this.filteredItems : this.items;
 		if (kb.matches(data, "selectUp")) {
-			this.selectedIndex = this.selectedIndex === 0 ? this.items.length - 1 : this.selectedIndex - 1;
+			if (displayItems.length === 0) return;
+			this.selectedIndex = this.selectedIndex === 0 ? displayItems.length - 1 : this.selectedIndex - 1;
 		} else if (kb.matches(data, "selectDown")) {
-			this.selectedIndex = this.selectedIndex === this.items.length - 1 ? 0 : this.selectedIndex + 1;
+			if (displayItems.length === 0) return;
+			this.selectedIndex = this.selectedIndex === displayItems.length - 1 ? 0 : this.selectedIndex + 1;
 		} else if (kb.matches(data, "selectConfirm") || data === " ") {
 			this.activateItem();
 		} else if (kb.matches(data, "selectCancel")) {
 			this.onCancel();
+		} else if (this.searchEnabled && this.searchInput) {
+			const sanitized = data.replace(/ /g, "");
+			if (!sanitized) {
+				return;
+			}
+			this.searchInput.handleInput(sanitized);
+			this.applyFilter(this.searchInput.getValue());
 		}
 	}
 
 	private activateItem(): void {
-		const item = this.items[this.selectedIndex];
+		const item = this.searchEnabled ? this.filteredItems[this.selectedIndex] : this.items[this.selectedIndex];
 		if (!item) return;
 
 		if (item.submenu) {
@@ -189,4 +228,20 @@ export class SettingsList implements Component {
 			this.submenuItemIndex = null;
 		}
 	}
+
+	private applyFilter(query: string): void {
+		this.filteredItems = fuzzyFilter(this.items, query, (item) => item.label);
+		this.selectedIndex = 0;
+	}
+
+	private addHintLine(lines: string[]): void {
+		lines.push("");
+		lines.push(
+			this.theme.hint(
+				this.searchEnabled
+					? "  Type to search · Enter/Space to change · Esc to cancel"
+					: "  Enter/Space to change · Esc to cancel",
+			),
+		);
+	}
 }