feat(cache): implement LRUCache and AsyncLRUCache for efficient data management

2026-04-05 16:31:45 +08:00 · 2025-02-04 04:13:36 +08:00
parent b5be93fa56
commit 5154db3269
5 changed files with 112 additions and 92 deletions
--- a/lib/components/base/text.dart
+++ b/lib/components/base/text.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:moodiary/components/base/marquee.dart';
+import 'package:moodiary/utils/lru.dart';

 class AdaptiveText extends StatelessWidget {
  final String text;
@@ -82,6 +83,8 @@ class EllipsisText extends StatelessWidget {
  final String ellipsis;
  final int? maxLines;

+  static final _cache = LRUCache<String, String>(maxSize: 1000);
+
  const EllipsisText(
    this.text, {
    super.key,
@@ -90,10 +93,7 @@ class EllipsisText extends StatelessWidget {
    this.maxLines,
  });

-  double _calculateTextWidth(
-    String text,
-    TextScaler textScaler,
-  ) {
+  double _calculateTextWidth(String text, TextScaler textScaler) {
    final span = TextSpan(text: text.fixAutoLines(), style: style);
    final tp = TextPainter(
      text: span,
@@ -120,15 +120,31 @@ class EllipsisText extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final textScaler = MediaQuery.textScalerOf(context);
+
    return LayoutBuilder(builder: (context, constraints) {
      if (text.isEmpty) {
        return const SizedBox.shrink();
      }
+
+      final cacheKey =
+          '${text.hashCode}_${ellipsis}_${constraints.maxWidth}_$maxLines';
+      final cachedResult = _cache.get(cacheKey);
+      if (cachedResult != null) {
+        return Text(
+          cachedResult,
+          maxLines: maxLines,
+          overflow: TextOverflow.ellipsis,
+          style: style,
+          textScaler: textScaler,
+        );
+      }
+
      if (!_createTextPainter(
        text,
        constraints.maxWidth,
        textScaler,
      ).didExceedMaxLines) {
+        _cache.put(cacheKey, text.fixAutoLines());
        return Text(
          text.fixAutoLines(),
          maxLines: maxLines,
@@ -143,8 +159,6 @@ class EllipsisText extends StatelessWidget {
      double leftWidth = 0;
      double rightWidth = 0;

-      String truncatedText = text;
-
      int lastValidLeftIndex = 0;
      int lastValidRightIndex = text.characters.length;

@@ -157,6 +171,7 @@ class EllipsisText extends StatelessWidget {
            rightWidth;
        final currentText =
            '${text.runeSubstring(0, leftIndex)}$ellipsis${text.runeSubstring(rightIndex)}';
+
        if (_createTextPainter(
          currentText,
          constraints.maxWidth,
@@ -176,10 +191,10 @@ class EllipsisText extends StatelessWidget {
        }
      }

-      final leftText = text.runeSubstring(0, lastValidLeftIndex);
-      final rightText = text.runeSubstring(lastValidRightIndex);
+      final truncatedText =
+          '${text.runeSubstring(0, lastValidLeftIndex)}$ellipsis${text.runeSubstring(lastValidRightIndex)}';

-      truncatedText = '$leftText$ellipsis$rightText';
+      _cache.put(cacheKey, truncatedText.fixAutoLines());

      return Text(
        truncatedText.fixAutoLines(),
--- a/lib/utils/lru.dart
+++ b/lib/utils/lru.dart
@@ -0,0 +1,72 @@
+import 'dart:collection';
+
+import 'package:synchronized/synchronized.dart';
+
+class LRUCache<K, V> {
+  final int maxSize;
+  final LinkedHashMap<K, V> _map;
+
+  LRUCache({this.maxSize = 1000}) : _map = LinkedHashMap<K, V>();
+
+  V? get(K key) {
+    if (!_map.containsKey(key)) return null;
+    final value = _map.remove(key) as V;
+    _map[key] = value;
+    return value;
+  }
+
+  void put(K key, V value) {
+    if (_map.containsKey(key)) {
+      _map.remove(key);
+    } else if (_map.length >= maxSize) {
+      _map.remove(_map.keys.first);
+    }
+    _map[key] = value;
+  }
+
+  void clear() => _map.clear();
+
+  int size() => _map.length;
+
+  @override
+  String toString() => _map.toString();
+}
+
+class AsyncLRUCache<K, V> {
+  final int maxSize;
+  final LinkedHashMap<K, V> _map = LinkedHashMap<K, V>();
+  final Lock _lock = Lock();
+
+  AsyncLRUCache({this.maxSize = 1000});
+
+  Future<V?> get(K key) async {
+    return await _lock.synchronized(() async {
+      if (!_map.containsKey(key)) return null;
+      final value = _map.remove(key) as V;
+      _map[key] = value;
+      return value;
+    });
+  }
+
+  Future<void> put(K key, V value) async {
+    await _lock.synchronized(() async {
+      if (_map.containsKey(key)) {
+        _map.remove(key);
+      } else if (_map.length >= maxSize) {
+        _map.remove(_map.keys.first);
+      }
+      _map[key] = value;
+    });
+  }
+
+  Future<void> clear() async {
+    await _lock.synchronized(() => _map.clear());
+  }
+
+  Future<int> size() async {
+    return await _lock.synchronized(() => _map.length);
+  }
+
+  @override
+  String toString() => _map.toString();
+}
--- a/lib/utils/media_util.dart
+++ b/lib/utils/media_util.dart
@@ -1,5 +1,4 @@
 import 'dart:async';
-import 'dart:collection';
 import 'dart:io';

 import 'package:fc_native_video_thumbnail/fc_native_video_thumbnail.dart';
@@ -16,6 +15,7 @@ import 'package:moodiary/src/rust/api/compress.dart';
 import 'package:moodiary/src/rust/api/constants.dart' as r_type;
 import 'package:moodiary/utils/file_util.dart';
 import 'package:moodiary/utils/log_util.dart';
+import 'package:moodiary/utils/lru.dart';
 import 'package:moodiary/utils/notice_util.dart';
 import 'package:path/path.dart';
 import 'package:uuid/uuid.dart';
@@ -25,6 +25,9 @@ class MediaUtil {

  static final _thumbnail = FcNativeVideoThumbnail();

+  static final _imageAspectRatioCache =
+      AsyncLRUCache<String, double>(maxSize: 1000);
+
  static void useAndroidImagePicker() {
    final ImagePickerPlatform imagePickerImplementation =
        ImagePickerPlatform.instance;
@@ -186,36 +189,25 @@ class MediaUtil {
    return completer.future;
  }

-  static const int _maxCacheSize = 1000;
-  static final LinkedHashMap<String, double> _cache = LinkedHashMap();
-
  static Future<double> getImageAspectRatio(ImageProvider imageProvider) async {
    final key = _getImageKey(imageProvider);
-
-    if (_cache.containsKey(key)) {
-      return _cache[key]!;
+    final cachedAspectRatio = await _imageAspectRatioCache.get(key);
+    if (cachedAspectRatio != null) {
+      return cachedAspectRatio;
    }

    final completer = Completer<double>();
    final imageStream = imageProvider.resolve(const ImageConfiguration());
    imageStream.addListener(
-      ImageStreamListener((ImageInfo info, bool _) {
+      ImageStreamListener((ImageInfo info, bool _) async {
        final aspectRatio = info.image.width / info.image.height;
-        _addToCache(key, aspectRatio);
+        await _imageAspectRatioCache.put(key, aspectRatio);
        completer.complete(aspectRatio);
      }),
    );
-
    return completer.future;
  }

-  static void _addToCache(String key, double ratio) {
-    if (_cache.length >= _maxCacheSize) {
-      _cache.remove(_cache.keys.first);
-    }
-    _cache[key] = ratio;
-  }
-
  static String _getImageKey(ImageProvider imageProvider) {
    if (imageProvider is AssetImage) {
      return 'asset_${imageProvider.assetName}';
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -478,14 +478,6 @@ packages:
      url: "https://pub.dev"
    source: hosted
    version: "1.0.2"
-  csv:
-    dependency: transitive
-    description:
-      name: csv
-      sha256: c6aa2679b2a18cb57652920f674488d89712efaf4d3fdf2e537215b35fc19d6c
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.0.0"
  cupertino_icons:
    dependency: "direct main"
    description:
@@ -1330,14 +1322,6 @@ packages:
      url: "https://pub.dev"
    source: hosted
    version: "0.6.7"
-  json2yaml:
-    dependency: transitive
-    description:
-      name: json2yaml
-      sha256: da94630fbc56079426fdd167ae58373286f603371075b69bf46d848d63ba3e51
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.0.1"
  json_annotation:
    dependency: transitive
    description:
@@ -1709,18 +1693,18 @@ packages:
    dependency: "direct main"
    description:
      name: package_info_plus
-      sha256: b15fad91c4d3d1f2b48c053dd41cb82da007c27407dc9ab5f9aa59881d0e39d4
+      sha256: c447a3c3e7be4addf129b8f9ab6a4bd5d166b78918223e223b61fddf4d07e254
      url: "https://pub.dev"
    source: hosted
-    version: "8.1.4"
+    version: "8.2.0"
  package_info_plus_platform_interface:
    dependency: transitive
    description:
      name: package_info_plus_platform_interface
-      sha256: a5ef9986efc7bf772f2696183a3992615baa76c1ffb1189318dd8803778fb05b
+      sha256: "205ec83335c2ab9107bbba3f8997f9356d72ca3c715d2f038fc773d0366b4c76"
      url: "https://pub.dev"
    source: hosted
-    version: "3.0.2"
+    version: "3.1.0"
  path:
    dependency: "direct main"
    description:
@@ -2186,22 +2170,6 @@ packages:
      url: "https://pub.dev"
    source: hosted
    version: "0.3.8"
-  sensors_plus:
-    dependency: "direct main"
-    description:
-      name: sensors_plus
-      sha256: "905282c917c6bb731c242f928665c2ea15445aa491249dea9d98d7c79dc8fd39"
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.1.1"
-  sensors_plus_platform_interface:
-    dependency: transitive
-    description:
-      name: sensors_plus_platform_interface
-      sha256: "58815d2f5e46c0c41c40fb39375d3f127306f7742efe3b891c0b1c87e2b5cd5d"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.0.1"
  share_plus:
    dependency: "direct main"
    description:
@@ -2311,30 +2279,6 @@ packages:
    description: flutter
    source: sdk
    version: "0.0.0"
-  slang:
-    dependency: "direct main"
-    description:
-      name: slang
-      sha256: "2778b88f05ffc23fd0a37436f607bf2a541d0b6b922e69a8ea5bbd50c2427d18"
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.4.1"
-  slang_build_runner:
-    dependency: "direct dev"
-    description:
-      name: slang_build_runner
-      sha256: "15b251e8aa591d96a16da3678abdca814a5d21486d14f98602c52b169f794d7b"
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.4.2"
-  slang_flutter:
-    dependency: "direct main"
-    description:
-      name: slang_flutter
-      sha256: "819637a23348adbc4f4e8faee3f274d8908f9af31d57bf1e277cd730b14bacde"
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.4.0"
  sliver_tools:
    dependency: "direct main"
    description:
@@ -2488,7 +2432,7 @@ packages:
    source: hosted
    version: "28.2.3"
  synchronized:
-    dependency: transitive
+    dependency: "direct main"
    description:
      name: synchronized
      sha256: "69fe30f3a8b04a0be0c15ae6490fc859a78ef4c43ae2dd5e8a623d45bfcf9225"
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -27,7 +27,7 @@ dependencies:
  image_picker: 1.1.2
  device_info_plus: 11.2.2
  photo_view: 0.15.0
-  package_info_plus: 8.1.4
+  package_info_plus: 8.2.0
  uuid: 4.5.1
  flutter_quill: 11.0.0-dev.21
  share_plus: 10.1.4
@@ -101,16 +101,14 @@ dependencies:
    sdk: flutter
  moodiary_rust:
    path: rust_builder
-  slang: 4.4.1
-  slang_flutter: 4.4.0
  modal_bottom_sheet: 3.0.0
  sheet: 1.0.0
  tutorial_coach_mark: 1.2.12
  adaptive_dialog: 2.4.0
  flutter_inappwebview: 6.1.5
-  sensors_plus: 6.1.1
  markdown: 7.3.0
  flutter_highlight: 0.7.0
+  synchronized: 3.3.0+3
 #  //llama_cpp_dart: 0.0.8


@@ -119,7 +117,6 @@ dev_dependencies:
  #    sdk: flutter
  build_runner: 2.4.14
  flutter_launcher_icons: 0.14.3
-  slang_build_runner: 4.4.2
  msix: 3.16.8
  flutter_lints: 5.0.0