From 9320c04c1c115e35d2ef0dd3bc6dcf88909b8b33 Mon Sep 17 00:00:00 2001
From: guozhigq <guozhigq@outlook.com>
Date: Fri, 27 Sep 2024 16:38:47 +0800
Subject: [PATCH] =?UTF-8?q?opt:=20=E4=B8=93=E6=A0=8F=E4=BB=A3=E7=A0=81?=
 =?UTF-8?q?=E5=9D=97=E6=B8=B2=E6=9F=93?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 lib/common/widgets/html_render.dart | 15 +++++++++++++++
 lib/utils/highlight.dart            | 14 ++++++++++++++
 pubspec.lock                        |  8 ++++++++
 3 files changed, 37 insertions(+)
 create mode 100644 lib/utils/highlight.dart

diff --git a/lib/common/widgets/html_render.dart b/lib/common/widgets/html_render.dart
index 0a728f86..c626978e 100644
--- a/lib/common/widgets/html_render.dart
+++ b/lib/common/widgets/html_render.dart
@@ -4,6 +4,7 @@ import 'package:flutter_html/flutter_html.dart';
 import 'package:get/get.dart';
 import 'package:pilipala/plugin/pl_gallery/hero_dialog_route.dart';
 import 'package:pilipala/plugin/pl_gallery/interactiveviewer_gallery.dart';
+import 'package:pilipala/utils/highlight.dart';
 import 'network_img_layer.dart';
 
 // ignore: must_be_immutable
@@ -25,6 +26,20 @@ class HtmlRender extends StatelessWidget {
       data: htmlContent,
       onLinkTap: (String? url, Map<String, String> buildContext, attributes) {},
       extensions: [
+        TagExtension(
+          tagsToExtend: <String>{'pre'},
+          builder: (ExtensionContext extensionContext) {
+            final Map<String, dynamic> attributes = extensionContext.attributes;
+            final String lang = attributes['data-lang'] as String;
+            final String code = attributes['codecontent'] as String;
+            List<String> selectedLanguages = [lang.split('@').first];
+            TextSpan? result = highlightExistingText(code, selectedLanguages);
+            if (result == null) {
+              return const Center(child: Text('代码块渲染失败'));
+            }
+            return SelectableText.rich(result);
+          },
+        ),
         TagExtension(
           tagsToExtend: <String>{'img'},
           builder: (ExtensionContext extensionContext) {
diff --git a/lib/utils/highlight.dart b/lib/utils/highlight.dart
new file mode 100644
index 00000000..c19b2f43
--- /dev/null
+++ b/lib/utils/highlight.dart
@@ -0,0 +1,14 @@
+import 'package:flutter/material.dart';
+import 'package:re_highlight/languages/all.dart';
+import 'package:re_highlight/re_highlight.dart';
+import 'package:re_highlight/styles/all.dart';
+
+TextSpan? highlightExistingText(String text, List<String> languages) {
+  final Highlight highlight = Highlight();
+  highlight.registerLanguages(builtinAllLanguages);
+  final HighlightResult result = highlight.highlightAuto(text, languages);
+  final TextSpanRenderer renderer =
+      TextSpanRenderer(const TextStyle(), builtinAllThemes['github']!);
+  result.render(renderer);
+  return renderer.span;
+}
diff --git a/pubspec.lock b/pubspec.lock
index 51d97f66..1eac70f7 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1226,6 +1226,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "4.1.0"
+  re_highlight:
+    dependency: "direct main"
+    description:
+      name: re_highlight
+      sha256: "6c4ac3f76f939fb7ca9df013df98526634e17d8f7460e028bd23a035870024f2"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.0.3"
   rxdart:
     dependency: transitive
     description: