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Feat：历史堆栈列表由存储对象改为存储字符串，减少内存占用

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街角小林
2025-03-25 19:03:41 +08:00
parent e53e41dadc
commit 8414d39c4c
1 changed files with 18 additions and 14 deletions
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32
simple-mind-map/src/core/command/Command.js
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@@ -15,7 +15,7 @@ class Command {
this.opt = opt
this.mindMap = opt.mindMap
this.commands = {}
this.history = []
this.history = [] // 字符串形式存储
this.activeHistoryIndex = 0
// 注册快捷键
this.registerShortcutKeys()
@@ -107,18 +107,18 @@ class Command {
return
}
this.mindMap.emit('beforeAddHistory')
const lastData =
const lastDataStr =
this.history.length > 0 ? this.history[this.activeHistoryIndex] : null
const data = this.getCopyData()
const dataStr = JSON.stringify(data)
// 此次数据和上次一样则不重复添加
if (lastData === data) return
if (lastData && JSON.stringify(lastData) === JSON.stringify(data)) {
if (lastDataStr && lastDataStr === dataStr) {
return
}
this.emitDataUpdatesEvent(lastData, data)
this.emitDataUpdatesEvent(lastDataStr, dataStr)
// 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))
this.history.push(dataStr)
// 历史记录数超过最大数量
if (this.history.length > this.mindMap.opt.maxHistoryCount) {
this.history.shift()
@@ -138,15 +138,16 @@ class Command {
return
}
if (this.activeHistoryIndex - step >= 0) {
const lastData = this.history[this.activeHistoryIndex]
const lastDataStr = this.history[this.activeHistoryIndex]
this.activeHistoryIndex -= step
this.mindMap.emit(
'back_forward',
this.activeHistoryIndex,
this.history.length
)
const data = simpleDeepClone(this.history[this.activeHistoryIndex])
this.emitDataUpdatesEvent(lastData, data)
const dataStr = this.history[this.activeHistoryIndex]
const data = JSON.parse(dataStr)
this.emitDataUpdatesEvent(lastDataStr, dataStr)
return data
}
}
@@ -158,15 +159,16 @@ class Command {
}
let len = this.history.length
if (this.activeHistoryIndex + step <= len - 1) {
const lastData = this.history[this.activeHistoryIndex]
const lastDataStr = this.history[this.activeHistoryIndex]
this.activeHistoryIndex += step
this.mindMap.emit(
'back_forward',
this.activeHistoryIndex,
this.history.length
)
const data = simpleDeepClone(this.history[this.activeHistoryIndex])
this.emitDataUpdatesEvent(lastData, data)
const dataStr = this.history[this.activeHistoryIndex]
const data = JSON.parse(dataStr)
this.emitDataUpdatesEvent(lastDataStr, dataStr)
return data
}
}
@@ -195,12 +197,14 @@ class Command {
}
// 派发思维导图更新明细事件
emitDataUpdatesEvent(lastData, data) {
emitDataUpdatesEvent(lastDataStr, dataStr) {
try {
// 如果data_change_detail没有监听者，那么不进行计算，节省性能
const eventName = 'data_change_detail'
const count = this.mindMap.event.listenerCount(eventName)
if (count > 0 && lastData && data) {
if (count > 0 && lastDataStr && dataStr) {
const lastData = JSON.parse(lastDataStr)
const data = JSON.parse(dataStr)
const lastDataObj = simpleDeepClone(transformTreeDataToObject(lastData))
const dataObj = simpleDeepClone(transformTreeDataToObject(data))
const res = []