优化

闫增涛

2024-05-27 e260bcc1eac42ca8eb7f519148a42c945607d2a2

 src/books/childHealth/view/content/index.vue

@@ -1,19 +1,58 @@
<template>
  <div class="page-main" @scroll="throttledScrollHandler">
    <div class="page-content">
      <pageHeader v-if="showCatalogList.indexOf(0) > -1"></pageHeader>
      <chapterOne v-if="showCatalogList.indexOf(1) > -1"></chapterOne>
      <chapterTwo v-if="showCatalogList.indexOf(2) > -1"></chapterTwo>
      <chapterThree v-if="showCatalogList.indexOf(3) > -1"></chapterThree>
      <chapterFour v-if="showCatalogList.indexOf(4) > -1"></chapterFour>
      <chapterFive v-if="showCatalogList.indexOf(5) > -1"></chapterFive>
      <chapterSix v-if="showCatalogList.indexOf(6) > -1"></chapterSix>
      <chapterSeven v-if="showCatalogList.indexOf(7) > -1"></chapterSeven>
      <chapterEight v-if="showCatalogList.indexOf(8) > -1"></chapterEight>
      <chapterNine v-if="showCatalogList.indexOf(9) > -1"></chapterNine>
      <chapterTen v-if="showCatalogList.indexOf(10) > -1"></chapterTen>
      <chapterEleven v-if="showCatalogList.indexOf(11) > -1"></chapterEleven>
      <chapterTwelve v-if="showCatalogList.indexOf(12) > -1"></chapterTwelve>
      <pageHeader
        v-if="showCatalogList.indexOf(0) > -1"
        :showPageList="loadPageList"
      ></pageHeader>
      <chapterOne
        v-if="showCatalogList.indexOf(1) > -1"
        :showPageList="loadPageList"
      ></chapterOne>
      <chapterTwo
        v-if="showCatalogList.indexOf(2) > -1"
        :showPageList="loadPageList"
      ></chapterTwo>
      <chapterThree
        v-if="showCatalogList.indexOf(3) > -1"
        :showPageList="loadPageList"
      ></chapterThree>
      <chapterFour
        v-if="showCatalogList.indexOf(4) > -1"
        :showPageList="loadPageList"
      ></chapterFour>
      <chapterFive
        v-if="showCatalogList.indexOf(5) > -1"
        :showPageList="loadPageList"
      ></chapterFive>
      <chapterSix
        v-if="showCatalogList.indexOf(6) > -1"
        :showPageList="loadPageList"
      ></chapterSix>
      <chapterSeven
        v-if="showCatalogList.indexOf(7) > -1"
        :showPageList="loadPageList"
      ></chapterSeven>
      <chapterEight
        v-if="showCatalogList.indexOf(8) > -1"
        :showPageList="loadPageList"
      ></chapterEight>
      <chapterNine
        v-if="showCatalogList.indexOf(9) > -1"
        :showPageList="loadPageList"
      ></chapterNine>
      <chapterTen
        v-if="showCatalogList.indexOf(10) > -1"
        :showPageList="loadPageList"
      ></chapterTen>
      <chapterEleven
        v-if="showCatalogList.indexOf(11) > -1"
        :showPageList="loadPageList"
      ></chapterEleven>
      <chapterTwelve
        v-if="showCatalogList.indexOf(12) > -1"
        :showPageList="loadPageList"
      ></chapterTwelve>
      <chapterThirteen
        v-if="showCatalogList.indexOf(13) > -1"
      ></chapterThirteen>
@@ -46,12 +85,15 @@
      loadThreshold: 300, // 触发加载阈值
      throttleThreshold: 100, // 节流阈值
      previousScrollTop: 0,
      throttledScrollHandler: null
      throttledScrollHandler: null,
      observer: null,
      loadPageObserver: null,
      loadPageList: []
    };
  },
  watch: {
    showCatalogList: {
      handler(newVal) {
      handler(newVal, oldVal) {
        if (
          this.$store.state.qiankun &&
          this.$store.state.qiankun.catalogChange
@@ -61,6 +103,11 @@
            showCatalogList: newVal
          });
        }
        // 启动页码观察
        setTimeout(() => {
          this.initObservation();
          this.initThemeColor();
        }, 500);
      }
    }
  },
@@ -87,23 +134,51 @@
        // 删除笔记、高亮、划线
        delSign: (data) => {
          this.delSign(data);
        },
        }
      });
    }

    // 创建一个新的 Intersection Observer 实例，用于观察目标元素和执行相应的回调函数。
    // new IntersectionObserver(callback, options)：使用之前定义的 callback 回调函数和 options 配置选项来初始化 Intersection Observer 实例。
    this.observer = new IntersectionObserver(this.pageChangeCallback, {
      root: null, // 指定根元素，这里设为 null，表示选取整个视窗作为根元素。
      rootMargin: "0px", // 指定根元素的边界，这里设为 "0px"，表示根元素的边界和视窗的边界重合
      threshold: 0.5 // 指定交叉比例，这里设为 0.5，表示当目标元素一半或更多显示在视窗中时触发回调函数。
    });

    this.loadPageObserver = new IntersectionObserver(this.loadPageCallback, {
      root: null, // 指定根元素，这里设为 null，表示选取整个视窗作为根元素。
      rootMargin: "0px", // 指定根元素的边界，这里设为 "0px"，表示根元素的边界和视窗的边界重合
      threshold: 0 // 指定交叉比例，这里设为 0.5，表示当目标元素一半或更多显示在视窗中时触发回调函数。
    });

    // 启动页码观察
    setTimeout(() => {
      this.initObservation();
      this.initThemeColor();
    }, 500);

    // 测试页面跳转
    // setTimeout(() => {
    //   this.gotoPage(5, 100);
    //   setTimeout(() => {
    //     this.renderSign("Note", {
    //       page: 100,
    //       txt: "前儿童生长发育的影响是一个渐",
    //       id: "2ACA9359",
    //       txt: "营养素和热量，才能",
    //       page: "100",
    //       type: "Highlight",
    //       color: "#F5E12A"
    //     });
    //     setTimeout(() => {
    //       this.delSign({
    //         ids: ["2ACA9359"]
    //       });
    //     }, 2000);
    //   }, 1000);
    // }, 3000);
  },
  methods: {
    // 滚动监听
    scrollFun(event) {
      // 判断向上滚动还是向下滚动
      if (event.target.scrollTop > this.previousScrollTop) {
@@ -145,19 +220,10 @@
        }
      }
      // showCatalogList 当前显示的三个章节，watch监听传递给主应用
      console.log(this.showCatalogList);
      // 更新上一次滚动的位置
      this.previousScrollTop = event.target.scrollTop;

      // 返回页码和章节信息
      if (this.$store.state.qiankun && this.$store.state.qiankun.pageChange)
        this.$store.state.qiankun.pageChange({
          page: 100,
          catalog: 5,
          catalogId: "",
          catalogName: ""
        });
    },
    // 章节、页面跳转
    gotoPage(catalog, page) {
      if (catalog >= 0 && catalog <= this.catalogLength) {
        // 处理渲染章节
@@ -187,6 +253,8 @@
        console.log("章节错误！");
      }
    },

    // 渲染标记
    renderSign(type, data) {
      const existence = (
        this.container ? this.container : document
@@ -202,26 +270,27 @@
            // 高亮
            pageDom.innerHTML = pageDom.innerHTML.replace(
              reg,
              `<span datatype="Highlight" dataid="${data.id}" style="background: ${data.color};" class="highLight">${data.txt}</span>`
              `<span datatype="Highlight" dataid="${data.id}" style="background: ${data.color};" class="highLight" onclick="signClick('Highlight','${data.id}','${data.chapterNum}')">${data.txt}</span>`
            );
            break;
          case "Dashing":
            // 划线
            pageDom.innerHTML = pageDom.innerHTML.replace(
              reg,
              `<span datatype="Dashing" dataid="${data.id}" style="text-decoration-color:${data.color};" class="underline">${data.txt}</span>`
              `<span datatype="Dashing" dataid="${data.id}" style="text-decoration-color:${data.color};" class="underline" onclick="signClick('Dashing','${data.id}','${data.chapterNum}')">${data.txt}</span>`
            );
            break;
          case "Note":
            // 笔记
            pageDom.innerHTML = pageDom.innerHTML.replace(
              reg,
              `<span datatype="Note" dataid="${data.id}" style="border-bottom-color:${data.color}" class="notesline">${data.txt}</span><img src="${NoteIcon}" style="cursor: pointer" />`
              `<span datatype="Note" dataid="${data.id}" style="border-bottom-color:${data.color}" class="notesline" onclick="signClick('Note','${data.id}','${data.chapterNum}')" onmouseover="noteHover('Note','${data.id}','${data.chapterNum}')">${data.txt}<img src="${NoteIcon}"/></span>`
            );
            break;
        }
      }
    },
    // 删除标记渲染
    delSign({ ids, type }) {
      if (ids && ids.length) {
        for (let i = 0; i < ids.length; i++) {
@@ -247,6 +316,150 @@
          );
        }
      }
    },
    initObservation() {
      const sections = (
        this.container ? this.container : document
      ).querySelectorAll(".page-box");
      sections.forEach((section) => {
        //observer 观察每个元素，以便在它们进入或离开视窗时触发回调函数。
        const isObserver = section.getAttribute("observer");
        const isLoadObserver = section.getAttribute("loadObserver");
        if (!isObserver) {
          this.observer.observe(section);
          section.setAttribute("observer", "1");
        }
        if (!isLoadObserver) {
          this.loadPageObserver.observe(section);
          section.setAttribute("loadObserver", "1");
        }
      });
    },
    initThemeColor() {
      // 获取各种需要主题色的节点
      const colorDom = (
        this.container ? this.container : document
      ).querySelectorAll(".theme-color");
      const backgroundColorDom = (
        this.container ? this.container : document
      ).querySelectorAll(".theme-back");
      const borderColorDom = (
        this.container ? this.container : document
      ).querySelectorAll(".theme-border");
      // 获取配置的主题色
      const bookThemeColor =
        this.config.activeBook && this.config.activeBook.bookThemeColor
          ? this.config.activeBook.bookThemeColor
          : null;
      const chapterThemeColor =
        this.config.activeBook && this.config.activeBook.chapterThemeColor
          ? this.config.activeBook.chapterThemeColor
          : null;
      const pageThemeColor =
        this.config.activeBook && this.config.activeBook.pageThemeColor
          ? this.config.activeBook.pageThemeColor
          : null;
      colorDom.forEach((domItem) => {
        // 获取章节、页码
        let pageDom = this.getParentWithClass(domItem, "page-box");
        let chapterDom = this.getParentWithClass(domItem, "chapter");
        let page, chapterNum;
        if (pageDom) page = pageDom.getAttribute("page");
        if (chapterDom) chapterNum = chapterDom.getAttribute("num");
        // 向上匹配主题色
        const themeColor =
          page && pageThemeColor && pageThemeColor[page]
            ? pageThemeColor[page]
            : chapterNum && chapterThemeColor && chapterThemeColor[chapterNum]
            ? chapterThemeColor[chapterNum]
            : bookThemeColor;
        if (themeColor) {
          domItem.style.color = themeColor;
        }
      });
      backgroundColorDom.forEach((domItem) => {
        // 获取章节、页码
        let pageDom = this.getParentWithClass(domItem, "page-box");
        let chapterDom = this.getParentWithClass(domItem, "chapter");
        let page, chapterNum;
        if (pageDom) page = pageDom.getAttribute("page");
        if (chapterDom) chapterNum = chapterDom.getAttribute("num");
        // 向上匹配主题色
        const themeColor =
          page && pageThemeColor && pageThemeColor[page]
            ? pageThemeColor[page]
            : chapterNum && chapterThemeColor && chapterThemeColor[chapterNum]
            ? chapterThemeColor[chapterNum]
            : bookThemeColor;
        if (themeColor) {
          domItem.style.backgroundColor = themeColor;
        }
      });
      borderColorDom.forEach((domItem) => {
        // 获取章节、页码
        let pageDom = this.getParentWithClass(domItem, "page-box");
        let chapterDom = this.getParentWithClass(domItem, "chapter");
        let page, chapterNum;
        if (pageDom) page = pageDom.getAttribute("page");
        if (chapterDom) chapterNum = chapterDom.getAttribute("num");
        // 向上匹配主题色
        const themeColor =
          page && pageThemeColor && pageThemeColor[page]
            ? pageThemeColor[page]
            : chapterNum && chapterThemeColor && chapterThemeColor[chapterNum]
            ? chapterThemeColor[chapterNum]
            : bookThemeColor;
        if (themeColor) {
          domItem.style.borderColor = themeColor;
        }
      });
    },
    getParentWithClass(element, className) {
      while (element.parentElement) {
        element = element.parentElement;
        if (element.classList.contains(className)) {
          return element;
        }
      }
    },
    pageChangeCallback(entries, observer) {
      //entries：代表观察到的目标元素的集合。 observer：代表观察者对象。
      entries.forEach((entry) => {
        //entry.isIntersecting：检查当前目标元素是否与根元素相交。
        if (entry.isIntersecting) {
          const target = entry.target;
          //entry.target：获取当前目标元素
          const page = target.getAttribute("page");
          const catalogDom = this.tool.getParentNodeByClassName(
            target,
            "chapter"
          );
          const catalog = catalogDom.getAttribute("num");
          console.log("page", page, catalog);
          // 返回页码和章节信息
          if (this.$store.state.qiankun && this.$store.state.qiankun.pageChange)
            this.$store.state.qiankun.pageChange({
              page: page,
              catalog: catalog
            });
          // const sections = Array.from(document.querySelectorAll(".section"));
          //sections：获取所有具有 .section 类名的元素，并转换为数组。
          // let index = sections.findIndex((section) => section === target) + 1;
          //index：查找当前目标元素在 sections 数组中的索引，并加 1，用于确定当前页码。
        }
      });
    },
    loadPageCallback(entries, observer) {
      entries.forEach((entry) => {
        if (entry.isIntersecting) {
          const target = entry.target;
          const page = target.getAttribute("page");
          if (this.loadPageList.indexOf(page) == -1) {
            this.loadPageList.push(page);
            console.log(this.loadPageList,"this.loadPageList");
          }
        }
      });
    }
  },
  components: {