1 files changed, 116 insertions, 0 deletions
diff --git a/src/vs/workbench/contrib/snippets/browser/commands/emptyFileSnippets.ts b/src/vs/workbench/contrib/snippets/browser/commands/emptyFileSnippets.ts
new file mode 100644
index 00000000000..963c92e60cb
--- /dev/null
+++ b/src/vs/workbench/contrib/snippets/browser/commands/emptyFileSnippets.ts
@@ -0,0 +1,116 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { groupBy, isFalsyOrEmpty } from 'vs/base/common/arrays';
+import { compare } from 'vs/base/common/strings';
+import { getCodeEditor } from 'vs/editor/browser/editorBrowser';
+import { ILanguageService } from 'vs/editor/common/languages/language';
+import { SnippetController2 } from 'vs/editor/contrib/snippet/browser/snippetController2';
+import { localize } from 'vs/nls';
+import { ServicesAccessor } from 'vs/platform/instantiation/common/instantiation';
+import { IQuickInputService, IQuickPickItem, IQuickPickSeparator } from 'vs/platform/quickinput/common/quickInput';
+import { SnippetsAction } from 'vs/workbench/contrib/snippets/browser/commands/abstractSnippetsActions';
+import { ISnippetsService } from 'vs/workbench/contrib/snippets/browser/snippets';
+import { Snippet } from 'vs/workbench/contrib/snippets/browser/snippetsFile';
+import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
+
+export class SelectSnippetForEmptyFile extends SnippetsAction {
+
+	static readonly Id = 'workbench.action.populateFromSnippet';
+
+	constructor() {
+		super({
+			id: SelectSnippetForEmptyFile.Id,
+			title: {
+				value: localize('label', 'Populate from Snippet'),
+				original: 'Populate from Snippet'
+			},
+			f1: true,
+		});
+	}
+
+	async run(accessor: ServicesAccessor): Promise<void> {
+		const snippetService = accessor.get(ISnippetsService);
+		const quickInputService = accessor.get(IQuickInputService);
+		const editorService = accessor.get(IEditorService);
+		const langService = accessor.get(ILanguageService);
+
+		const editor = getCodeEditor(editorService.activeTextEditorControl);
+		if (!editor || !editor.hasModel()) {
+			return;
+		}
+
+		const snippets = await snippetService.getSnippets(undefined, { topLevelSnippets: true, noRecencySort: true, includeNoPrefixSnippets: true });
+		if (snippets.length === 0) {
+			return;
+		}
+
+		const selection = await this._pick(quickInputService, langService, snippets);
+		if (!selection) {
+			return;
+		}
+
+		if (editor.hasModel()) {
+			// apply snippet edit -> replaces everything
+			SnippetController2.get(editor)?.apply([{
+				range: editor.getModel().getFullModelRange(),
+				template: selection.snippet.body
+			}]);
+
+			// set language if possible
+			if (langService.isRegisteredLanguageId(selection.langId)) {
+				editor.getModel().setMode(selection.langId);
+			}
+		}
+	}
+
+	private async _pick(quickInputService: IQuickInputService, langService: ILanguageService, snippets: Snippet[]) {
+
+		// spread snippet onto each language it supports
+		type SnippetAndLanguage = { langId: string; snippet: Snippet };
+		const all: SnippetAndLanguage[] = [];
+		for (const snippet of snippets) {
+			if (isFalsyOrEmpty(snippet.scopes)) {
+				all.push({ langId: '', snippet });
+			} else {
+				for (const langId of snippet.scopes) {
+					all.push({ langId, snippet });
+				}
+			}
+		}
+
+		type SnippetAndLanguagePick = IQuickPickItem & { snippet: SnippetAndLanguage };
+		const picks: (SnippetAndLanguagePick | IQuickPickSeparator)[] = [];
+
+		const groups = groupBy(all, (a, b) => compare(a.langId, b.langId));
+
+		for (const group of groups) {
+			let first = true;
+			for (const item of group) {
+
+				if (first) {
+					picks.push({
+						type: 'separator',
+						label: langService.getLanguageName(item.langId) ?? item.langId
+					});
+					first = false;
+				}
+
+				picks.push({
+					snippet: item,
+					label: item.snippet.prefix || item.snippet.name,
+					detail: item.snippet.description
+				});
+			}
+		}
+
+		const pick = await quickInputService.pick(picks, {
+			placeHolder: localize('placeholder', 'Select a snippet'),
+			matchOnDetail: true,
+		});
+
+		return pick?.snippet;
+	}
+}