Add lightweight multi-language snippet system

.gitattributes

@@ -1 +1,33 @@
+# Normalize all text files to LF in the repository
+* text=auto eol=lf
+
+# Common text/code files
+*.js text eol=lf
+*.ts text eol=lf
+*.json text eol=lf
+*.yml text eol=lf
+*.yaml text eol=lf
+*.md text eol=lf
+*.css text eol=lf
+*.html text eol=lf
+*.xml text eol=lf
+*.sh text eol=lf
+
+# Windows scripts keep CRLF
+*.bat text eol=crlf
+*.cmd text eol=crlf
+
+# Binary files
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.webp binary
+*.ico binary
+*.keystore binary
+*.jks binary
+*.jar binary
+*.apk binary
+
+# Change
 *.sh text eol=lf

.github/workflows/valid_pr.yml

@@ -0,0 +1,41 @@
+name: CI
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main, work]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  quality:
+    name: Linting and formatting
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run Biome CI
+        run: npx biome ci .
+
+      - name: Typecheck
+        run: npm run typecheck

src/lib/editorManager.js

@@ -68,6 +68,10 @@ import quickTools from "components/quickTools";
 import ScrollBar from "components/scrollbar";
 import SideButton, { sideButtonContainer } from "components/sideButton";
 import keyboardHandler, { keydownState } from "handlers/keyboard";
+import {
+	createSnippetCompletionSource,
+	expandSnippetShortcut,
+} from "lib/snippets";
 import EditorFile from "./editorFile";
 import openFile from "./openFile";
 import { addedFolder } from "./openFolder";
@@ -1155,6 +1159,24 @@ async function EditorManager($header, $body) {
 		});
 		const exts = [...baseExtensions];
 		maybeAttachEmmetCompletions(exts, syntax);
+		const snippetLanguageId = getFileLanguageId(file);
+		exts.push(
+			EditorState.languageData.of(() => [
+				{
+					autocomplete: createSnippetCompletionSource(snippetLanguageId),
+				},
+			]),
+		);
+		exts.push(
+			Prec.high(
+				keymap.of([
+					{
+						key: "Tab",
+						run: (view) => expandSnippetShortcut(view, snippetLanguageId),
+					},
+				]),
+			),
+		);
 		try {
 			const langExtFn = file.currentLanguageExtension;
 			let initialLang = [];

src/lib/settings.js

@@ -191,6 +191,10 @@ class Settings {
 				servers: {},
 			},
 			developerMode: false,
+			snippets: {
+				enabled: true,
+				user: {},
+			},
 			shiftClickSelection: false,
 		};
 		this.value = structuredClone(this.#defaultSettings);