feat: add scaffolding for UI components, and initial component

eslint.config.mjs

@@ -6,7 +6,12 @@ import tsEslint from "typescript-eslint";
 
 export default [
 	{
-		ignores: [".github/", "dist/", "node_modules/", "types/", "*.mjs"],
+		ignores: [
+			".github/",
+			"dist/",
+			"node_modules/",
+			"types/",
+		],
 	},
 
 	/**
@@ -121,6 +126,17 @@ export default [
 		},
 	},
 
+	/**
+	 * JavaScript.
+	 */
+	{
+		files: ["**/*.{js,cjs,mjs}"],
+		rules: {
+			"@typescript-eslint/explicit-function-return-type": "off",
+			"jsdoc/no-types": "off",
+		},
+	},
+
 	/**
 	 * Tests and mocks.
 	 */

jest.config.js

@@ -12,6 +12,7 @@ const config = {
 	verbose: true,
 	roots: ["src"],
 	transform: {
+		// TypeScript.
 		"^.+\\.ts$": [
 			"@swc/jest",
 			{
@@ -27,7 +28,15 @@ const config = {
 				},
 			},
 		],
+		// Transform ESM.
+		"^.+\\.(js|jsx)$": "@swc/jest",
+		// Ignore CSS files.
+		"^.+\\.css$": "<rootDir>/tests/__setup__/empty-transform.cjs",
 	},
+	transformIgnorePatterns: [
+		// Selective ESM transformation enables working with Lit.
+		"node_modules/(?!(lit-html|lit-element|lit|@lit)/)",
+	],
 };
 
 export default config;

package.json

@@ -79,11 +79,13 @@
         "jest-websocket-mock": "^2.5.0",
         "prettier": "^3.0.3",
         "rollup": "^4.0.2",
+        "rollup-plugin-import-css": "^3.5.5",
         "typescript": "^5.2.2",
         "typescript-eslint": "^8.8.0"
     },
     "dependencies": {
         "@elgato/schemas": "^0.3.1",
+        "lit": "^3.2.1",
         "ws": "^8.17.1"
     }
 }

rollup.config.mjs

@@ -2,6 +2,7 @@ import nodeResolve from "@rollup/plugin-node-resolve";
 import typescript from "@rollup/plugin-typescript";
 import { dirname, join, parse, resolve } from "node:path";
 import url from "node:url";
+import css from "rollup-plugin-import-css";
 
 const isWatching = !!process.env.ROLLUP_WATCH;
 const banner = `/**!
@@ -51,6 +52,10 @@ export default streamDeck;
 					});
 				},
 			},
+			css({
+				inject: true,
+				modules: false,
+			}),
 		],
 	};
 }

src/ui/components/field.ts

@@ -0,0 +1,65 @@
+import { LitElement, css, html, type HTMLTemplateResult } from "lit";
+import { customElement, property } from "lit/decorators.js";
+
+/**
+ * Field that identifies an input, or group of inputs.
+ */
+@customElement("sd-field")
+export class SDFieldElement extends LitElement {
+	/**
+	 * @inheritdoc
+	 */
+	public static styles = [
+		css`
+			.sd-field {
+				align-items: baseline;
+				column-gap: 10px;
+				display: grid;
+				grid-template-columns: 93px 262px;
+			}
+		`,
+	];
+
+	/**
+	 * Label to show for the field.
+	 */
+	@property()
+	accessor label: string | undefined = undefined;
+
+	/**
+	 * @inheritdoc
+	 */
+	public render(): HTMLTemplateResult {
+		return html`
+			<div class="sd-field">
+				<div class="sd-field-label">
+					<label @click=${this.#focusFirstElement}>${this.label ? this.label + ":" : undefined}</label>
+				</div>
+				<div class="sd-field-input">
+					<slot></slot>
+				</div>
+			</div>
+		`;
+	}
+
+	/**
+	 * Focuses the first element, that can have focus, within the field.
+	 */
+	#focusFirstElement(): void {
+		for (const el of this.querySelectorAll("*")) {
+			if ("focus" in el && typeof el.focus === "function") {
+				el.focus();
+				return;
+			}
+		}
+	}
+}
+
+declare global {
+	interface HTMLElementTagNameMap {
+		/**
+		 * Field that identifies an input, or group of inputs.
+		 */
+		"sd-field": SDFieldElement;
+	}
+}

src/ui/components/index.ts

@@ -0,0 +1 @@
+import "./field";

src/ui/css/global.d.ts

@@ -0,0 +1 @@
+declare module "*.css";

src/ui/css/main.css

@@ -0,0 +1,37 @@
+:root {
+	--sd-background-color: #2d2d2d;
+	--sd-color-content-primary: #d8d8d8;
+	--sd-color-content-secondary: #969696;
+	--sd-font-size: 12px;
+	--sd-line-height: calc(var(--sd-font-size) * 1.333);
+	--sd-scrollbar-track-color: #262626;
+	--sd-scrollbar-thumb-color: #666666;
+}
+
+body {
+	background-color: var(--sd-background-color);
+	color: var(--sd-color-content-primary);
+	font-size: var(--sd-font-size);
+	font-family:
+		System,
+		"Segoe UI",
+		Arial,
+		Roboto,
+		Helvetica sans-serif;
+	line-height: var(--sd-line-height);
+	margin: 8px 8px 8px 0px;
+	text-rendering: optimizeLegibility;
+}
+
+::-webkit-scrollbar {
+	width: 4px;
+}
+
+::-webkit-scrollbar-track {
+	background-color: var(--sd-scrollbar-track-color);
+}
+
+::-webkit-scrollbar-thumb {
+	background-color: var(--sd-scrollbar-thumb-color);
+	border-radius: 2px;
+}

src/ui/index.ts

@@ -1,7 +1,9 @@
 import { type ActionInfo, type RegistrationInfo } from "../api";
 import type { IDisposable } from "../common/disposable";
 import type { JsonObject } from "../common/json";
+import "./components";
 import { connection } from "./connection";
+import "./css/main.css";
 import { i18n } from "./i18n";
 import { logger } from "./logging";
 import { plugin } from "./plugin";

src/ui/tsconfig.json

@@ -9,7 +9,7 @@
             "dom",
             "es2022"
         ],
-        "module": "es2022",
+        "module": "ESNext",
         "moduleResolution": "Bundler",
         "skipLibCheck": true,
         "strict": true,

tests/__setup__/empty-transform.cjs

@@ -0,0 +1,12 @@
+/**
+ * An empty Jest transform, allowing for specific files to be omitted, for example CSS files.
+ */
+module.exports = {
+	/**
+	 * Processes the file, transforming it to a readable state... of no code.
+	 * @returns An empty set of code, without a map, that mimics a transformed file.
+	 */
+	process: () => {
+		return { code: "" };
+	},
+};