snapshot of https://github.com/flutter/samples.git (main, 2026-09-16; blobs > 131072B omitted)

platform_design/lib/utils.dart

@@ -0,0 +1,76 @@
+// Copyright 2020 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:math';
+
+import 'package:english_words/english_words.dart';
+// ignore: implementation_imports
+import 'package:flutter/material.dart';
+
+// This file has a number of platform-agnostic non-Widget utility functions.
+
+const _myListOfRandomColors = [
+  Colors.red,
+  Colors.blue,
+  Colors.teal,
+  Colors.yellow,
+  Colors.amber,
+  Colors.deepOrange,
+  Colors.green,
+  Colors.indigo,
+  Colors.lime,
+  Colors.pink,
+  Colors.orange,
+];
+
+final _random = Random();
+
+// Avoid customizing the word generator, which can be slow.
+// https://github.com/filiph/english_words/issues/9
+final wordPairIterator = generateWordPairs();
+
+String generateRandomHeadline() {
+  final artist = capitalizePair(wordPairIterator.first);
+
+  return switch (_random.nextInt(10)) {
+    0 => '$artist says ${nouns[_random.nextInt(nouns.length)]}',
+    1 => '$artist arrested due to ${wordPairIterator.first.join(' ')}',
+    2 => '$artist releases ${capitalizePair(wordPairIterator.first)}',
+    3 => '$artist talks about his ${nouns[_random.nextInt(nouns.length)]}',
+    4 => '$artist talks about her ${nouns[_random.nextInt(nouns.length)]}',
+    5 => '$artist talks about their ${nouns[_random.nextInt(nouns.length)]}',
+    6 =>
+      '$artist says their music is inspired by ${wordPairIterator.first.join(' ')}',
+    7 =>
+      '$artist says the world needs more ${nouns[_random.nextInt(nouns.length)]}',
+    8 =>
+      '$artist calls their band ${adjectives[_random.nextInt(adjectives.length)]}',
+    9 =>
+      '$artist finally ready to talk about ${nouns[_random.nextInt(nouns.length)]}',
+    _ => 'Failed to generate news headline',
+  };
+}
+
+List<MaterialColor> getRandomColors(int amount) {
+  return List<MaterialColor>.generate(amount, (index) {
+    return _myListOfRandomColors[_random.nextInt(
+      _myListOfRandomColors.length,
+    )];
+  });
+}
+
+List<String> getRandomNames(int amount) {
+  return wordPairIterator
+      .take(amount)
+      .map((pair) => capitalizePair(pair))
+      .toList();
+}
+
+String capitalize(String word) {
+  return '${word[0].toUpperCase()}${word.substring(1).toLowerCase()}';
+}
+
+String capitalizePair(WordPair pair) {
+  return '${capitalize(pair.first)} ${capitalize(pair.second)}';
+}