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+<template>
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+ <div class="mark-body-container tw-flex-auto tw-p-2" ref="dragContainer">
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+ <a-spin
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+ :spinning="rendering"
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+ size="large"
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+ tip="Loading..."
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+ style="margin-top: 50px"
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+ >
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+ <div v-if="!store.currentTask" class="tw-text-center">
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+ {{ store.message }}
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+ </div>
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+ <div v-else :style="{ width: answerPaperScale }">
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+ <div
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+ v-for="(item, index) in sliceImagesWithTrackList"
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+ :key="index"
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+ class="single-image-container"
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+ >
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+ <img :src="item.url" draggable="false" />
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+ <MarkDrawTrack
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+ :track-list="item.trackList"
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+ :special-tag-list="item.tagList"
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+ :original-image="item.originalImage"
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+ />
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+ <hr class="image-seperator" />
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+ </div>
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+ </div>
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+ </a-spin>
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+ </div>
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+</template>
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+
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+<script lang="ts">
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+import { computed, defineComponent, reactive, ref, watchEffect } from "vue";
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+import { store } from "./store";
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+import MarkDrawTrack from "./MarkDrawTrack.vue";
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+import { SpecialTag, Track } from "@/types";
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+import { useTimers } from "@/setups/useTimers";
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+import { loadImage } from "@/utils/utils";
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+import { dragImage } from "@/features/mark/use/draggable";
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+
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+interface SliceImage {
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+ url: string;
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+ indexInSliceUrls: number;
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+ trackList: Array<Track>;
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+ tagList: Array<SpecialTag>;
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+ originalImage: HTMLImageElement;
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+}
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+// should not render twice at the same time
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+let __lock = false;
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+let __currentStudentId = -1; // save __currentStudentIdof lock
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+export default defineComponent({
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+ name: "MarkBody",
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+ components: { MarkDrawTrack },
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+ emits: ["error"],
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+ setup(props, { emit }) {
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+ const { dragContainer } = dragImage();
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+
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+ const { addTimeout } = useTimers();
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+
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+ let rendering = ref(false);
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+ let sliceImagesWithTrackList: Array<SliceImage> = reactive([]);
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+
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+ async function processImage() {
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+ if (!store.currentTask) return;
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+
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+ const images = [];
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+ for (const url of store.currentTask.sliceUrls) {
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+ const image = await loadImage(url);
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+ images.push(image);
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+ }
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+
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+ for (const url of store.currentTask.sliceUrls) {
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+ const completeUrl = url;
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+
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+ const indexInSliceUrls = store.currentTask.sliceUrls.indexOf(url) + 1;
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+ const image = images[indexInSliceUrls - 1];
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+
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+ const trackLists = store.currentTask.questionList
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+ .map((q) => q.trackList)
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+ .reduce((acc, t) => {
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+ acc = acc.concat(t);
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+ return acc;
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+ }, [] as Array<Track>);
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+ const thisImageTrackList = trackLists.filter(
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+ (t) => t.offsetIndex === indexInSliceUrls
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+ );
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+ const thisImageTagList = store.currentTask.specialTagList.filter(
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+ (t) => t.offsetIndex === indexInSliceUrls
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+ );
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+
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+ sliceImagesWithTrackList.push({
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+ url: completeUrl,
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+ indexInSliceUrls,
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+ trackList: thisImageTrackList,
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+ tagList: thisImageTagList,
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+ originalImage: image,
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+ });
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+ }
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+ }
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+ const renderPaperAndMark = async () => {
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+ if (__lock) {
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+ if (store.currentTask?.studentId === __currentStudentId) {
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+ console.log("重复渲染,返回");
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+ return;
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+ }
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+ console.log("上个任务还未渲染完毕,稍等一秒再尝试渲染");
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+ await new Promise((res) => setTimeout(res, 1000));
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+ await renderPaperAndMark();
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+ return;
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+ }
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+ __lock = true;
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+ __currentStudentId = store.currentTask?.studentId ?? -1;
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+ sliceImagesWithTrackList.splice(0);
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+
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+ if (!store.currentTask) {
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+ __lock = false;
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+ return;
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+ }
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+
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+ try {
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+ rendering.value = true;
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+ await processImage();
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+ } catch (error) {
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+ sliceImagesWithTrackList.splice(0);
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+ console.log("render error ", error);
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+ // 图片加载出错,自动加载下一个任务
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+ emit("error");
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+ } finally {
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+ __lock = false;
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+ rendering.value = false;
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+ }
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+ };
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+
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+ watchEffect(renderPaperAndMark);
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+
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+ const answerPaperScale = computed(() => {
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+ // 放大、缩小不影响页面之前的滚动条定位
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+ let percentWidth = 0;
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+ let percentTop = 0;
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+ const container = document.querySelector(
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+ ".mark-body-container"
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+ ) as HTMLDivElement;
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+ if (container) {
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+ const { scrollLeft, scrollTop, scrollWidth, scrollHeight } = container;
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+ percentWidth = scrollLeft / scrollWidth;
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+ percentTop = scrollTop / scrollHeight;
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+ }
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+
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+ addTimeout(() => {
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+ if (container) {
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+ const { scrollWidth, scrollHeight } = container;
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+ container.scrollTo({
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+ left: scrollWidth * percentWidth,
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+ top: scrollHeight * percentTop,
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+ });
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+ }
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+ }, 10);
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+ const scale = store.setting.uiSetting["answer.paper.scale"];
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+ return scale * 100 + "%";
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+ });
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+
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+ return {
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+ dragContainer,
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+ store,
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+ rendering,
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+ sliceImagesWithTrackList,
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+ answerPaperScale,
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+ };
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+ },
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+});
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+</script>
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+
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+<style scoped>
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+.mark-body-container {
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+ height: calc(100vh - 41px);
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+ overflow: scroll;
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+ background-size: 8px 8px;
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+ background-image: linear-gradient(to right, #e7e7e7 4px, transparent 4px),
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+ linear-gradient(to bottom, transparent 4px, #e7e7e7 4px);
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+
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+ cursor: grab;
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+ user-select: none;
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+}
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+.grabbing {
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+ cursor: grabbing;
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+}
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+.mark-body-container img {
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+ width: 100%;
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+}
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+.single-image-container {
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+ position: relative;
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+}
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+.image-seperator {
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+ border: 2px solid rgba(120, 120, 120, 0.1);
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+}
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+</style>
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