opt.

lib/core/extension/context/common.dart

@@ -0,0 +1,11 @@
+import 'package:flutter/material.dart';
+
+extension ContextX on BuildContext {
+  void pop<T extends Object?>([T? result]) {
+    Navigator.of(this).pop<T>(result);
+  }
+
+  bool get canPop => Navigator.of(this).canPop();
+
+  bool get isDark => Theme.of(this).brightness == Brightness.dark;
+}

lib/core/extension/context/dialog.dart

@@ -0,0 +1,101 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_gen/gen_l10n/l10n.dart';
+import 'package:toolbox/core/extension/context/common.dart';
+
+import '../../../data/model/server/snippet.dart';
+import '../../../data/provider/snippet.dart';
+import '../../../data/res/ui.dart';
+import '../../../locator.dart';
+import '../../../view/widget/input_field.dart';
+import '../../../view/widget/picker.dart';
+import '../../route.dart';
+
+extension DialogX on BuildContext {
+  Future<T?> showRoundDialog<T>({
+    Widget? child,
+    List<Widget>? actions,
+    Widget? title,
+    bool barrierDismiss = true,
+  }) async {
+    return await showDialog<T>(
+      context: this,
+      barrierDismissible: barrierDismiss,
+      builder: (_) {
+        return AlertDialog(
+          title: title,
+          content: child,
+          actions: actions,
+          actionsPadding: const EdgeInsets.all(17),
+        );
+      },
+    );
+  }
+
+  void showLoadingDialog({bool barrierDismiss = false}) {
+    showRoundDialog(
+      child: UIs.centerSizedLoading,
+      barrierDismiss: barrierDismiss,
+    );
+  }
+
+  Future<String?> showPwdDialog(
+    String? user,
+  ) async {
+    if (!mounted) return null;
+    final s = S.of(this)!;
+    return await showRoundDialog<String>(
+      title: Text(user ?? s.pwd),
+      child: Input(
+        autoFocus: true,
+        type: TextInputType.visiblePassword,
+        obscureText: true,
+        onSubmitted: (val) => pop(val.trim()),
+        label: s.pwd,
+      ),
+    );
+  }
+
+  void showSnippetDialog(
+    S s,
+    void Function(Snippet s) onSelected,
+  ) {
+    final provider = locator<SnippetProvider>();
+    if (provider.snippets.isEmpty) {
+      showRoundDialog(
+        child: Text(s.noSavedSnippet),
+        actions: [
+          TextButton(
+            onPressed: () => pop(),
+            child: Text(s.ok),
+          ),
+          TextButton(
+            onPressed: () {
+              pop();
+              AppRoute.snippetEdit().go(this);
+            },
+            child: Text(s.add),
+          )
+        ],
+      );
+      return;
+    }
+
+    var snippet = provider.snippets.first;
+    showRoundDialog(
+      title: Text(s.choose),
+      child: Picker(
+        items: provider.snippets.map((e) => Text(e.name)).toList(),
+        onSelected: (idx) => snippet = provider.snippets[idx],
+      ),
+      actions: [
+        TextButton(
+          onPressed: () async {
+            pop();
+            onSelected(snippet);
+          },
+          child: Text(s.ok),
+        )
+      ],
+    );
+  }
+}

lib/core/extension/context/snackbar.dart

@@ -0,0 +1,33 @@
+import 'package:flutter/material.dart';
+import 'package:toolbox/view/widget/rebuild.dart';
+
+extension SnackBarX on BuildContext {
+  void showSnackBar(String text) =>
+      ScaffoldMessenger.of(this).showSnackBar(SnackBar(
+        content: Text(text),
+        behavior: SnackBarBehavior.floating,
+      ));
+
+  void showSnackBarWithAction(
+    String content,
+    String action,
+    GestureTapCallback onTap,
+  ) {
+    ScaffoldMessenger.of(this).showSnackBar(SnackBar(
+      content: Text(content),
+      behavior: SnackBarBehavior.floating,
+      action: SnackBarAction(
+        label: action,
+        onPressed: onTap,
+      ),
+    ));
+  }
+
+  void showRestartSnackbar({String? btn, String? msg}) {
+    showSnackBarWithAction(
+      msg ?? 'Need restart to take effect',
+      btn ?? 'Restart',
+      () => RebuildWidget.restartApp(this),
+    );
+  }
+}