HarmonyOS 如何在Text中做搜索词高亮?

class formatS { //定义为解析后的标签内容数组，str是要显示的内容，isAim为是否高亮标志  
  char: string = "";  
  isAim: boolean = false;  
}  
  
@Entry  
@Component  
struct Index {  
  @State sourceStr: string = '几点睡啊你好吗几点睡啊你好吗你好吗几点睡啊你好吗你好吗几几点睡啊点';  
  @State formatStr: formatS[] = []  
  
  processSource(str: string): formatS[] {  
    let result: formatS[] = []  
  
    const regex1 = RegExp('几点睡啊', 'g');  
    let indexList: number[] = []  
    let array: RegExpExecArray | null = null  
    while ((array = regex1.exec(str)) !== null) {  
      console.log(`start: ${array.index},Found ${array[0]}.end ${regex1.lastIndex - 1}.`);  
      indexList.push(array.index, regex1.lastIndex - 1)  
    }  
  
    let cache = ""  
    for (let index = 0; index < str.length; index++) {  
      if (!indexList.includes(index)) {  
        cache = cache + str[index]  
        if (index > indexList[indexList.length-1] && index === str.length - 1) {  
          result.push({  
            char: cache,  
            isAim: false  
          })  
        }  
      } else {  
        result.push({  
          char: cache,  
          isAim: false  
        })  
        result.push({  
          char: "几点睡啊",  
          isAim: true  
        })  
        index = index + "几点睡啊".length - 1  
        cache = ""  
      }  
    }  
  
    return result  
  }  
  
  build() {  
    Column() {  
      ForEach(this.processSource(this.sourceStr), (item: formatS) => {  
        if (item.isAim) {  
          Text(item.char).fontSize(20).fontColor(Color.Red); //对目标内容进行高亮处理  
        } else {  
          Text(item.char).fontSize(20);  
        }  
      })  
    }.width('100%').height('100%')  
  }  
}