From cf344bcd4b701d3d000d218c658c50cc70776f71 Mon Sep 17 00:00:00 2001
From: yutent <yutent.io@gmail.com>
Date: Tue, 19 Sep 2023 11:53:10 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E5=A4=8D=E6=9D=82=E7=B1=BB?=
 =?UTF-8?q?=E5=9E=8B=E5=B1=9E=E6=80=A7=E7=9A=84=E7=9B=91=E5=90=AC;?=
 =?UTF-8?q?=E8=B0=83=E6=95=B4keepAlive=E8=AE=BE=E5=AE=9A?=
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Content-Transfer-Encoding: 8bit

---
 src/constants.js |  2 ++
 src/index.js     | 59 +++++++++++++++++++++++++++++++-----------------
 2 files changed, 40 insertions(+), 21 deletions(-)

diff --git a/src/constants.js b/src/constants.js
index d33d830..29a2aee 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -35,6 +35,8 @@ const boolMap = Object.create(null)
 
 export { boolMap }
 
+export const KEEP_ALIVE = 'keep-alive' // hyphen
+export const KEEP_ALIVE_C = 'keepAlive' // camelize
 export const WC_PART = Symbol('wc_path')
 export const NOTHING = Symbol('wc-nothing')
 export const __finalized__ = Symbol('finalized')
diff --git a/src/index.js b/src/index.js
index 6931504..ae8c6f4 100644
--- a/src/index.js
+++ b/src/index.js
@@ -7,6 +7,8 @@ import {
   fixedValue,
   parsePropsDeclaration,
   boolMap,
+  KEEP_ALIVE,
+  KEEP_ALIVE_C,
   __finalized__,
   __props__,
   __changed_props__,
@@ -57,7 +59,7 @@ export class Component extends HTMLElement {
     this[__props__].forEach((options, prop) => {
       list.push(options.attrName)
     })
-    return list.concat(this.watches || [])
+    return list.concat(this.watches || [], KEEP_ALIVE)
   }
 
   static parseAnim() {
@@ -96,6 +98,10 @@ export class Component extends HTMLElement {
 
     if (this.hasOwnProperty('props')) {
       for (let k in this.props) {
+        // 保留关键字, 直接跳过
+        if (k === KEEP_ALIVE || k === KEEP_ALIVE_C) {
+          continue
+        }
         let options = parsePropsDeclaration(this.props[k])
         let attrName = k.toLowerCase()
 
@@ -121,6 +127,8 @@ export class Component extends HTMLElement {
     }
   }
 
+  keepAlive = false
+
   constructor() {
     super()
     this[__pending__] = false
@@ -159,16 +167,16 @@ export class Component extends HTMLElement {
     let descriptor
 
     if (options.type === Array || options.type === Object) {
-      let proxyValue = this.#createProxy(name, options)
+      let proxyValue = this.#createProxy(null, options, name)
       descriptor = {
         get() {
           return proxyValue
         },
         set(value) {
           proxyValue = this.#createProxy(
-            name,
+            fixedValue(value, options),
             options,
-            fixedValue(value, options)
+            name
           )
           this.$requestUpdate(name)
         },
@@ -199,13 +207,13 @@ export class Component extends HTMLElement {
     Object.defineProperty(this, name, descriptor)
   }
 
-  #createProxy(name, options, newValue) {
-    return new Proxy(newValue || options.default, {
+  #createProxy(obj, options = {}, key) {
+    return new Proxy(obj || options.default, {
       get: (target, prop, receiver) => {
         let value = Reflect.get(target, prop, receiver)
         // 当访问的值是对象时，需要对这个对象也进行代理
         if (typeof value === 'object') {
-          return this.#createProxy(value)
+          return this.#createProxy(value, {}, key)
         }
         return value
       },
@@ -214,9 +222,10 @@ export class Component extends HTMLElement {
           return true
         }
         let oldValue = target[prop]
-        Reflect.set(target, key, value, receiver)
+        Reflect.set(target, prop, value, receiver)
+
+        this.$requestUpdate(key)
 
-        this.$requestUpdate(name)
         if (options.observer) {
           options.observer.call(this, value, oldValue)
         }
@@ -249,28 +258,36 @@ export class Component extends HTMLElement {
   }
 
   disconnectedCallback() {
-    this[__children__]?.setConnected(false)
+    if (this.keepAlive) {
+      this.deactivated()
+    } else {
+      this[__children__]?.setConnected(false)
 
-    if (!document.body?.contains(this)) {
-      let $events = this.$events
-      if ($events) {
-        for (let name in $events) {
-          for (let it of $events[name]) {
-            unbind(it.el, name, it.listener, it.options)
+      if (!document.body?.contains(this)) {
+        let $events = this.$events
+        if ($events) {
+          for (let name in $events) {
+            for (let it of $events[name]) {
+              unbind(it.el, name, it.listener, it.options)
+            }
           }
         }
+        if (window.wkitd && this.$store) {
+          window.wkitd.deassign(this)
+        }
       }
-      if (window.wkitd && this.$store) {
-        window.wkitd.deassign(this)
-      }
+      this.unmounted()
     }
-    this.unmounted()
   }
   // 监听属性变化
   attributeChangedCallback(name, old, val) {
     if (old === val) {
       return
     }
+    if (name === KEEP_ALIVE) {
+      this.keepAlive = val !== null
+      return
+    }
     this.#attr2prop(name, val, old)
   }
 
@@ -368,7 +385,7 @@ export class Component extends HTMLElement {
       if (this.$animate?.immediate) {
         this.$animate()
       }
-      if (this.__keep_alive__) {
+      if (this.keepAlive) {
         nextTick(_ => this.activated())
       }
       nextTick(_ => this.mounted())