97 lines
2.3 KiB
Vue
97 lines
2.3 KiB
Vue
<template>
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<div
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ref="selfDomRef"
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class="fetch-more-block"
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>
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<template v-if="props.isFetching">
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<slot name="fetching">
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<div>{{ TUITranslateService.t("TUIChat.正在加载") }}</div>
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</slot>
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</template>
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<template v-else>
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<slot name="fetchEnd">
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<div>{{ TUITranslateService.t("TUIChat.加载结束") }}</div>
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</slot>
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</template>
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</div>
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</template>
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<script setup lang="ts">
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import { onMounted, onUnmounted, ref, watch, getCurrentInstance, withDefaults } from '../../../adapter-vue';
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import { TUITranslateService } from '@tencentcloud/chat-uikit-engine';
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import { isUniFrameWork } from '../../../utils/env';
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interface IProps {
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isFetching: boolean;
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isTerminateObserve?: boolean;
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}
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interface IEmits {
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(e: 'onExposed'): void;
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}
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const emits = defineEmits<IEmits>();
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const props = withDefaults(defineProps<IProps>(), {
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isFetching: false,
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isTerminateObserve: false,
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});
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let observer: unknown = null;
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const selfDomRef = ref();
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const thisInstance = getCurrentInstance()?.proxy || getCurrentInstance();
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onMounted(() => {
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if (props.isTerminateObserve) {
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return;
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}
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if (!isUniFrameWork) {
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observer = new IntersectionObserver(([entry]) => {
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if (entry.isIntersecting) {
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emits('onExposed');
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}
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}, {
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threshold: 1.0,
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});
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if (selfDomRef.value) {
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(observer as IntersectionObserver).observe(selfDomRef.value);
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}
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} else {
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observer = uni.createIntersectionObserver(thisInstance).relativeToViewport();
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(observer as any).observe('.fetch-more-block', () => {
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emits('onExposed');
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});
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}
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});
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onUnmounted(() => {
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if (observer) {
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(observer as IntersectionObserver).disconnect();
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observer = null;
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}
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});
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watch(() => props.isTerminateObserve, (isTerminateObserve: boolean) => {
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if (!observer) {
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return;
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}
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if (isTerminateObserve) {
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(observer as IntersectionObserver).disconnect();
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} else if (selfDomRef.value) {
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(observer as IntersectionObserver).disconnect();
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if (!isUniFrameWork) {
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(observer as IntersectionObserver).observe(selfDomRef.value);
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} else {
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(observer as any).observe('.fetch-more-block', () => {
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emits('onExposed');
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});
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}
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}
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});
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</script>
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<style scoped lang="scss">
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.fetch-more-block {
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color: #999;
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}
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</style>
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