From 077478d654cefe7b5044b5e85efa551d5e7262c2 Mon Sep 17 00:00:00 2001
From: wanglin2 <1013335014@qq.com>
Date: Thu, 20 Apr 2023 16:10:25 +0800
Subject: [PATCH] =?UTF-8?q?Feature=EF=BC=9A=E6=B7=BB=E5=8A=A0=E6=9C=80?=
 =?UTF-8?q?=E5=A4=A7=E5=8E=86=E5=8F=B2=E8=AE=B0=E5=BD=95=E6=95=B0=E9=99=90?=
 =?UTF-8?q?=E5=88=B6?=
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 simple-mind-map/index.js       | 4 +++-
 simple-mind-map/src/Command.js | 4 ++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/simple-mind-map/index.js b/simple-mind-map/index.js
index fb5f002c..da5beaaa 100644
--- a/simple-mind-map/index.js
+++ b/simple-mind-map/index.js
@@ -101,7 +101,9 @@ const defaultOpt = {
   // 节点备注浮层的z-index
   nodeNoteTooltipZIndex: 3000,
   // 是否在点击了画布外的区域时结束节点文本的编辑状态
-  isEndNodeTextEditOnClickOuter: true
+  isEndNodeTextEditOnClickOuter: true,
+  // 最大历史记录数
+  maxHistoryCount: 1000
 }
 
 //  思维导图
diff --git a/simple-mind-map/src/Command.js b/simple-mind-map/src/Command.js
index 7b49ef0d..b1c35c57 100644
--- a/simple-mind-map/src/Command.js
+++ b/simple-mind-map/src/Command.js
@@ -84,6 +84,10 @@ class Command {
     // 删除当前历史指针后面的数据
     this.history = this.history.slice(0, this.activeHistoryIndex + 1)
     this.history.push(simpleDeepClone(data))
+    // 历史记录数超过最大数量
+    if (this.history.length > this.mindMap.opt.maxHistoryCount) {
+      this.history.shift()
+    }
     this.activeHistoryIndex = this.history.length - 1
     this.mindMap.emit('data_change', this.removeDataUid(data))
     this.mindMap.emit(