优化整理imageknifecomponent代码

Signed-off-by: Madixin <madixin@huawei.com>

library/src/main/ets/ImageKnifeDispatcher.ets

@@ -67,6 +67,7 @@ export class ImageKnifeDispatcher {
 
 
     if (memoryCache !== undefined) {
+      LogUtil.log("ImageKnife_DataTime_showFromMemomry.end_true:" + request.imageKnifeOption.loadSrc)
       // 画主图
       if (request.requestState === ImageKnifeRequestState.PROGRESS) {
         // 回调请求开始
@@ -89,7 +90,6 @@ export class ImageKnifeDispatcher {
           request.requestState = ImageKnifeRequestState.ERROR
         }
       }
-      LogUtil.log("ImageKnife_DataTime_showFromMemomry.end_true:" + request.imageKnifeOption.loadSrc)
       return true
     }
     LogUtil.log("ImageKnife_DataTime_showFromMemomry.end_false:" + request.imageKnifeOption.loadSrc)

library/src/main/ets/components/ImageKnifeComponent.ets

@@ -36,52 +36,62 @@ export struct ImageKnifeComponent {
   private componentVersion: number = 0
   private currentContext: common.UIAbilityContext | undefined = undefined
   @Param imageKnifeOption: ImageKnifeOption = new ImageKnifeOption();
+
   @Monitor('imageKnifeOption',
   "imageKnifeOption.loadSrc","imageKnifeOption.signature","imageKnifeOption.transformation","imageKnifeOption.border","imageKnifeOption.objectFit")
   watchImageKnifeOption() {
-    if (this.request !== undefined) {
+    this.clearLastRequest()
-      this.request.requestState = ImageKnifeRequestState.DESTROY
-    }
-    this.request = undefined
     this.componentVersion++
+    this.objectFit = this.imageKnifeOption.objectFit === undefined ? ImageFit.Contain : this.imageKnifeOption.objectFit
+    LogUtil.log("watchImageKnifeOption execute request:width=" + this.currentWidth + " height= " + this.currentHeight
+      + " loadSrc = " + this.request?.imageKnifeOption.loadSrc
+      + " placeholderSrc = " + this.request?.imageKnifeOption.placeholderSrc
+      + " errorholderSrc = " + this.request?.imageKnifeOption.errorholderSrc)
     ImageKnife.getInstance().execute(this.getRequest(this.currentWidth, this.currentHeight))
   }
+
   aboutToAppear(): void {
-    //闪动问题失效，注释相应代码后续修复
+    this.objectFit = this.imageKnifeOption.objectFit === undefined ? ImageFit.Contain : this.imageKnifeOption.objectFit
-    if(this.syncLoad) {
+
+    if(this.syncLoad) { //针对部分消息列表最新消息的图片闪动问题，建议使用同步方式在aboutToAppear时加载图片
       let engineKey: IEngineKey = new DefaultEngineKey();
       let memoryCacheSrc: ImageKnifeData | undefined = ImageKnife.getInstance()
         .loadFromMemoryCache(engineKey.generateMemoryKey(this.imageKnifeOption.loadSrc,ImageKnifeRequestSource.SRC,this.imageKnifeOption))
       if (memoryCacheSrc !== undefined){
-        LogUtil.log("aboutToAppear load from memory cache for key = "+ engineKey.generateMemoryKey(this.imageKnifeOption.loadSrc,ImageKnifeRequestSource.SRC,this.imageKnifeOption))
+        LogUtil.log("aboutToAppear success load loadSrc from memory cache for loadSrc = "+ this.imageKnifeOption.loadSrc)
-        //画主图
         this.pixelMap = memoryCacheSrc.source;
-      }else {
+      }else{
-        let memoryCachePlace: ImageKnifeData | undefined = ImageKnife.getInstance()
+        LogUtil.log("aboutToAppear fail load loadSrc from memory cache for loadSrc = "+ this.imageKnifeOption.loadSrc)
-          .loadFromMemoryCache(engineKey.generateMemoryKey(this.imageKnifeOption.placeholderSrc!,ImageKnifeRequestSource.PLACE_HOLDER,this.imageKnifeOption))
+        if (this.imageKnifeOption.placeholderSrc !== undefined){
-        if (memoryCachePlace !== undefined){
+          let memoryCachePlace: ImageKnifeData | undefined = ImageKnife.getInstance()
-          LogUtil.log("aboutToAppear load from memory cache for key = "+ engineKey.generateMemoryKey(this.imageKnifeOption.loadSrc,ImageKnifeRequestSource.SRC,this.imageKnifeOption))
+            .loadFromMemoryCache(engineKey.generateMemoryKey(this.imageKnifeOption.placeholderSrc!,ImageKnifeRequestSource.PLACE_HOLDER,this.imageKnifeOption))
-          //画主图
+          if (memoryCachePlace !== undefined){
-          this.pixelMap = memoryCachePlace.source;
+            LogUtil.log("aboutToAppear success load placeholderSrc from memory cache for placeholderSrc = " + this.imageKnifeOption.placeholderSrc)
+            this.pixelMap = memoryCachePlace.source;
+          }else{
+            LogUtil.log("aboutToAppear fail load placeholderSrc from memory cache for placeholderSrc = " + this.imageKnifeOption.placeholderSrc)
+          }
         }
       }
     }
-    this.objectFit = this.imageKnifeOption.objectFit === undefined ? ImageFit.Contain : this.imageKnifeOption.objectFit
   }
 
   aboutToDisappear(): void {
-    if (this.request !== undefined) {
+    this.clearLastRequest()
-      this.request.requestState = ImageKnifeRequestState.DESTROY
-      this.request = undefined
-    }
   }
 
   aboutToRecycle() {
+    this.clearLastRequest()
+  }
+
+  /**
+   * 对已DESTROY的组件不再发起请求
+   */
+  private clearLastRequest(){
     if (this.request !== undefined) {
       this.request.requestState = ImageKnifeRequestState.DESTROY
       this.request = undefined
     }
-    this.objectFit = this.imageKnifeOption.objectFit === undefined ? ImageFit.Contain : this.imageKnifeOption.objectFit
   }
 
   build() {
@@ -99,14 +109,15 @@ export struct ImageKnifeComponent {
         this.currentHeight = newValue.height as number
         this.lastWidth = oldValue.width as number
         this.lastHeight = oldValue.height as number
-        if (this.currentWidth <= 0 || this.currentHeight <= 0) {
+
-          // 存在宽或者高为0,此次重回无意义,无需进行request请求
+        // 条件1: 宽高值均有效,值>0. 条件2：当前宽高与上一次宽高不同
-        } else {
+        if (this.currentWidth > 0 && this.currentHeight > 0 &&
-          // 前提：宽高值均有效,值>0. 条件1：当前宽高与上一次宽高不同  条件2:当前是第一次绘制
+          (this.currentHeight != this.lastHeight || this.currentWidth != this.lastWidth)) {
-          if (this.currentHeight != this.lastHeight || this.currentWidth != this.lastWidth) {
+          LogUtil.log("onSizeChange execute request:width=" + this.currentWidth + " height= " + this.currentHeight
-            LogUtil.log("execute request:width=" + this.currentWidth + " height= " + this.currentHeight)
+            + " loadSrc = " + this.request?.imageKnifeOption.loadSrc
-            ImageKnife.getInstance().execute(this.getRequest(this.currentWidth, this.currentHeight))
+            + " placeholderSrc = " + this.request?.imageKnifeOption.placeholderSrc
-          }
+            + " errorholderSrc = " + this.request?.imageKnifeOption.errorholderSrc)
+          ImageKnife.getInstance().execute(this.getRequest(this.currentWidth, this.currentHeight))
         }
       })
   }
@@ -132,24 +143,10 @@ export struct ImageKnifeComponent {
               return //针对reuse场景，不显示历史图片
             }
             this.pixelMap = pixelMap
-            if (typeof this.pixelMap !== 'string') {
+            if (typeof this.pixelMap !== 'string' && this.imageKnifeOption.objectFit === ImageFit.Auto) { //针对静态图高度自适应
-              if (this.imageKnifeOption.objectFit === ImageFit.Auto) {
+              let info = await this.pixelMap.getImageInfo()
-                let info = await this.pixelMap.getImageInfo()
+              this.adaptiveWidth = this.currentWidth
-
+              this.adaptiveHeight = info.size.height * this.currentWidth / info.size.width
-                this.adaptiveWidth = this.currentWidth
-                this.adaptiveHeight = info.size.height * this.currentWidth / info.size.width
-
-                // if (this.currentWidth / this.currentHeight > info.size.width / info.size.height) {
-                //   this.adaptiveWidth = this.currentWidth
-                //   this.adaptiveHeight = info.size.height * this.currentWidth / this.currentHeight
-                // }
-                // else {
-                //   this.adaptiveWidth = info.size.width * this.currentWidth / this.currentHeight
-                //   this.adaptiveHeight = this.currentHeight
-                // }
-              }
-            } else {
-              //console.info("KKKKKKKKKKK:" + pixelMap)
             }
 
             if (requestSource == ImageKnifeRequestSource.SRC) {
@@ -169,7 +166,3 @@ export struct ImageKnifeComponent {
     return this.request
   }
 }
-
-interface KeyCanvas {
-  keyId: string
-}