From 535b3c0b029be1cf14da624e8ae111db4489de93 Mon Sep 17 00:00:00 2001
From: Whiterzi <catwhiter@gmail.com>
Date: Fri, 17 Oct 2025 10:16:13 +0800
Subject: [PATCH] #20591: add `shrinkWrapHorizontal` for markdown body layout

---
 packages/flutter_markdown/lib/src/builder.dart |  7 +++++--
 packages/flutter_markdown/lib/src/widget.dart  | 10 ++++++++--
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/packages/flutter_markdown/lib/src/builder.dart b/packages/flutter_markdown/lib/src/builder.dart
index d67da1dc06e7..bc58504af1f8 100644
--- a/packages/flutter_markdown/lib/src/builder.dart
+++ b/packages/flutter_markdown/lib/src/builder.dart
@@ -158,12 +158,15 @@ class MarkdownBuilder implements md.NodeVisitor {
     this.onTapText,
     this.softLineBreak = false,
     this.customizedMarkdownHandler,
+    this.shrinkWrapHorizontal = false,
   }) : assert(imageBuilder == null || sizedImageBuilder == null,
             'Only one of imageBuilder or sizedImageBuilder may be specified.');
 
   /// A delegate that controls how link and `pre` elements behave.
   final MarkdownBuilderDelegate delegate;
 
+  final bool shrinkWrapHorizontal;
+
   /// If true, the text is selectable.
   ///
   /// Defaults to false.
@@ -493,9 +496,9 @@ class MarkdownBuilder implements md.NodeVisitor {
 
       final Wrap wrap = Wrap(children: mergedTexts.map((w) {
         return w is SelectableText ? Row(
-          mainAxisSize: MainAxisSize.max,
+          mainAxisSize: shrinkWrapHorizontal ? MainAxisSize.min : MainAxisSize.max,
           children: [
-            Expanded(child: w)
+            Flexible(child: w)
           ]
         ) : w;
       }).toList());
diff --git a/packages/flutter_markdown/lib/src/widget.dart b/packages/flutter_markdown/lib/src/widget.dart
index f20b549bfa56..d341ee526f8c 100644
--- a/packages/flutter_markdown/lib/src/widget.dart
+++ b/packages/flutter_markdown/lib/src/widget.dart
@@ -301,9 +301,13 @@ abstract class MarkdownWidget extends StatefulWidget {
     this.listItemCrossAxisAlignment =
         MarkdownListItemCrossAxisAlignment.baseline,
     this.softLineBreak = false,
-    this.customizedMarkdownHandler
+    this.customizedMarkdownHandler,
+    this.shrinkWrapHorizontal = false,
   });
 
+  /// Shrink wrap in vertical axis if true.
+  final bool shrinkWrapHorizontal;
+
   /// The Markdown to display.
   final String data;
 
@@ -486,7 +490,8 @@ class _MarkdownWidgetState extends State<MarkdownWidget>
       onSelectionChanged: widget.onSelectionChanged,
       onTapText: widget.onTapText,
       softLineBreak: widget.softLineBreak,
-      customizedMarkdownHandler: widget.customizedMarkdownHandler
+      customizedMarkdownHandler: widget.customizedMarkdownHandler,
+      shrinkWrapHorizontal: widget.shrinkWrapHorizontal,
     );
 
     _children = builder.build(astNodes);
@@ -562,6 +567,7 @@ class MarkdownBody extends MarkdownWidget {
     super.paddingBuilders,
     super.listItemCrossAxisAlignment,
     this.shrinkWrap = true,
+    super.shrinkWrapHorizontal,
     super.fitContent = true,
     super.softLineBreak,
     super.customizedMarkdownHandler,