From c428f166a60fb833f106bdee9a502cc0a4fd5bad Mon Sep 17 00:00:00 2001
From: esky-wh <esky@eseasky.cn>
Date: Thu, 14 Sep 2023 14:11:13 +0800
Subject: [PATCH] =?UTF-8?q?Feat:=201.=E6=B7=BB=E5=8A=A0=E5=BC=80=E5=90=AF?=
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---
 .../src/constants/defaultOptions.js           |  4 ++-
 simple-mind-map/src/core/render/Render.js     | 30 +++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/simple-mind-map/src/constants/defaultOptions.js b/simple-mind-map/src/constants/defaultOptions.js
index 1f1b5709..14db4e59 100644
--- a/simple-mind-map/src/constants/defaultOptions.js
+++ b/simple-mind-map/src/constants/defaultOptions.js
@@ -182,5 +182,7 @@ export const defaultOpt = {
   // 节点鼠标hover和激活时显示的矩形边框距节点内容的距离
   hoverRectPadding: 2,
   // 双击节点进入节点文本编辑时是否默认选中文本，默认只在创建新节点时会选中
-  selectTextOnEnterEditText: false
+  selectTextOnEnterEditText: false,
+  // 删除节点后激活相邻节点
+  deleteNodeActive: true,
 }
diff --git a/simple-mind-map/src/core/render/Render.js b/simple-mind-map/src/core/render/Render.js
index 230713cb..5886e490 100644
--- a/simple-mind-map/src/core/render/Render.js
+++ b/simple-mind-map/src/core/render/Render.js
@@ -824,6 +824,8 @@ class Render {
     if (this.activeNodeList.length <= 0 && appointNodes.length <= 0) {
       return
     }
+    // 删除节点后需要激活的节点
+    let needActiveNode = null
     let isAppointNodes = appointNodes.length > 0
     let list = isAppointNodes ? appointNodes : this.activeNodeList
     let root = list.find(node => {
@@ -837,6 +839,27 @@ class Render {
       root.children = []
       root.nodeData.children = []
     } else {
+      // 如果只选中了一个节点，删除后激活其兄弟节点或者父节点
+      if (
+          this.activeNodeList.length === 1 &&
+          !this.activeNodeList[0].isGeneralization&&this.mindMap.opt.deleteNodeActive
+      ) {
+        const node = this.activeNodeList[0]
+        const broList = node.parent.children
+        const nodeIndex = broList.findIndex(item => item.uid === node.uid)
+        // 如果后面有兄弟节点
+        if (nodeIndex < broList.length - 1) {
+          needActiveNode = broList[nodeIndex + 1]
+        } else {
+          // 如果前面有兄弟节点
+          if (nodeIndex > 0) {
+            needActiveNode = broList[nodeIndex - 1]
+          } else {
+            // 没有兄弟节点
+            needActiveNode = node.parent
+          }
+        }
+      }
       for (let i = 0; i < list.length; i++) {
         let node = list[i]
         if (isAppointNodes) list.splice(i, 1)
@@ -855,6 +878,13 @@ class Render {
         }
       }
     }
+    this.activeNodeList = []
+    // 激活被删除节点的兄弟节点或父节点
+    if (needActiveNode) {
+      this.activeNodeList.push(needActiveNode)
+      this.setNodeActive(needActiveNode, true)
+      needActiveNode = null
+    }
     this.mindMap.emit('node_active', null, [...this.activeNodeList])
     this.mindMap.render()
   }