From e266a4e69028010784c5c3a555f9f465465868b5 Mon Sep 17 00:00:00 2001
From: fengge <844143714@qq.com>
Date: Wed, 3 Jun 2026 14:48:58 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96(UI):=20=E4=BF=AE=E5=A4=8D=20?=
 =?UTF-8?q?Markdown=20=E6=B8=B2=E6=9F=93=E5=AF=BC=E8=87=B4=E7=9A=84?=
 =?UTF-8?q?=E5=86=85=E5=AD=98=E6=8A=96=E5=8A=A8?=
MIME-Version: 1.0
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将 Markwon 解析引擎的 builder 创建逻辑提取到 LazyColumn 的外部并记忆化（remember），将其作为参数传入每一条消息的渲染组件中。
这避免了在聊天列表滚动时，每条消息都会高频实例化一个极度消耗资源的全新的 Markwon 引擎，从而极大减少了短命对象的创建和 GC 压力。
---
 .../standapp/ui/chat/components/ChatArea.kt   | 27 ++++++++++---------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/app/src/main/java/com/stand/standapp/ui/chat/components/ChatArea.kt b/app/src/main/java/com/stand/standapp/ui/chat/components/ChatArea.kt
index 3e2a1df..2580c4a 100644
--- a/app/src/main/java/com/stand/standapp/ui/chat/components/ChatArea.kt
+++ b/app/src/main/java/com/stand/standapp/ui/chat/components/ChatArea.kt
@@ -40,6 +40,18 @@ fun ChatArea(
         }
     }
 
+    val context = androidx.compose.ui.platform.LocalContext.current
+    val markwon = remember(context) {
+        io.noties.markwon.Markwon.builder(context)
+            .usePlugin(io.noties.markwon.core.CorePlugin.create())
+            .usePlugin(io.noties.markwon.ext.tables.TablePlugin.create(context))
+            .usePlugin(io.noties.markwon.html.HtmlPlugin.create())
+            .usePlugin(io.noties.markwon.linkify.LinkifyPlugin.create())
+            .usePlugin(io.noties.markwon.ext.strikethrough.StrikethroughPlugin.create())
+            .usePlugin(io.noties.markwon.ext.tasklist.TaskListPlugin.create(context))
+            .build()
+    }
+    
     val isAnyStreaming = remember(messages) { messages.any { it.isStreaming } }
     if (isAnyStreaming) {
         val totalLength = messages.map { it.content.length }.sum()
@@ -111,6 +123,7 @@ fun ChatArea(
                             val contentWithCursor = msg.content + if (msg.isStreaming) " █" else ""
                             MarkwonRenderer(
                                 markdown = contentWithCursor,
+                                markwon = markwon,
                                 modifier = Modifier.padding(12.dp)
                             )
                         }
@@ -161,19 +174,7 @@ fun ChatArea(
 }
 
 @Composable
-fun MarkwonRenderer(markdown: String, modifier: Modifier) {
-    val context = androidx.compose.ui.platform.LocalContext.current
-    val markwon = remember(context) {
-        io.noties.markwon.Markwon.builder(context)
-            .usePlugin(io.noties.markwon.core.CorePlugin.create())
-            .usePlugin(io.noties.markwon.ext.tables.TablePlugin.create(context))
-            .usePlugin(io.noties.markwon.html.HtmlPlugin.create())
-            .usePlugin(io.noties.markwon.linkify.LinkifyPlugin.create())
-            .usePlugin(io.noties.markwon.ext.strikethrough.StrikethroughPlugin.create())
-            .usePlugin(io.noties.markwon.ext.tasklist.TaskListPlugin.create(context))
-            .build()
-    }
-
+fun MarkwonRenderer(markdown: String, markwon: io.noties.markwon.Markwon, modifier: Modifier) {
     androidx.compose.ui.viewinterop.AndroidView(
         factory = { ctx ->
             val textView = SafeSelectableTextView(ctx).apply {