From 552086cc1f5627043cef65e732377121b7920295 Mon Sep 17 00:00:00 2001
From: TimeBather <open-source@timebather.cn>
Date: Wed, 13 Nov 2024 22:32:07 +0800
Subject: [PATCH] fix(frontend): support addChildBefore method

---
 .../client/frontend/dom/nodes/DomNode.java    |  7 ++++++
 .../client/frontend/gui/nodes/GuiDomNode.java | 24 +++++++++++++++----
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/src/main/java/kasuga/lib/core/client/frontend/dom/nodes/DomNode.java b/src/main/java/kasuga/lib/core/client/frontend/dom/nodes/DomNode.java
index 9f27f269..954987bf 100644
--- a/src/main/java/kasuga/lib/core/client/frontend/dom/nodes/DomNode.java
+++ b/src/main/java/kasuga/lib/core/client/frontend/dom/nodes/DomNode.java
@@ -28,6 +28,13 @@ public DomNode(T context) {
         this.domContext = context;
     }
 
+    public boolean addChildBefore(DomNode<T> child, DomNode<T> before){
+        int index = children.indexOf(before);
+        if(index == -1)
+            return false;
+        return addChildAt(index,child);
+    }
+
     public boolean addChildAt(int i, DomNode<T> child){
         if(child.parent != null)
             return false;
diff --git a/src/main/java/kasuga/lib/core/client/frontend/gui/nodes/GuiDomNode.java b/src/main/java/kasuga/lib/core/client/frontend/gui/nodes/GuiDomNode.java
index c898b764..0aa6f130 100644
--- a/src/main/java/kasuga/lib/core/client/frontend/gui/nodes/GuiDomNode.java
+++ b/src/main/java/kasuga/lib/core/client/frontend/gui/nodes/GuiDomNode.java
@@ -69,18 +69,34 @@ public LayoutContext<?,GuiDomNode> getLayoutManager() {
 
     protected BackgroundRenderer background = new BackgroundRenderer();
 
+    @HostAccess.Export
+    @Override
+    public boolean addChildBefore(DomNode<GuiContext> child, DomNode<GuiContext> before) {
+        this.domContext.queueDuringRender(()->{
+            int index = children.indexOf(before);
+            if(index == -1)
+                return;
+            addChildInstant(index, child);
+        });
+        return true;
+    }
+
     @HostAccess.Export
     @Override
     public boolean addChildAt(int i, DomNode<GuiContext> child) {
         this.domContext.queueDuringRender(()->{
-            if(child instanceof GuiDomNode domNode)
-                getLayoutManager().addChild(i,domNode.getLayoutManager());
-            styles.notifyUpdate();
-            super.addChildAt(i,child);
+            addChildInstant(i, child);
         });
         return true;
     }
 
+    protected void addChildInstant(int i, DomNode<GuiContext> child){
+        if(child instanceof GuiDomNode domNode)
+            getLayoutManager().addChild(i,domNode.getLayoutManager());
+        styles.notifyUpdate();
+        super.addChildAt(i,child);
+    }
+
     @HostAccess.Export
     @Override
     public boolean removeChild(DomNode<GuiContext> child) {