<template>
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<div ref="messageContainer" class="h-100% overflow-y-auto relative">
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<div class="chat-list" v-for="(item, index) in list" :key="index">
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<!-- 靠左 message：system、assistant 类型 -->
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<div class="left-message message-item" v-if="item.type !== 'user'">
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<div class="message">
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<div class="left-text-container" ref="markdownViewRef">
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<MarkdownView class="left-text" :content="item.content" />
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</div>
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</div>
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</div>
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</div>
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</div>
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<!-- 回到底部 -->
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<div v-if="isScrolling" class="to-bottom" @click="handleGoBottom">
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<el-button :icon="ArrowDownBold" circle />
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</div>
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</template>
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<script setup lang="ts">
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import { PropType } from 'vue'
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import MarkdownView from '@/components/MarkdownView/index.vue'
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import { useClipboard } from '@vueuse/core'
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import { ArrowDownBold} from '@element-plus/icons-vue'
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import { ChatMessageApi, ChatMessageVO } from '@/api/ai/chat/message'
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import { ChatConversationVO } from '@/api/ai/chat/conversation'
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import { useUserStore } from '@/store/modules/user'
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const message = useMessage() // 消息弹窗
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const { copy } = useClipboard() // 初始化 copy 到粘贴板
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const userStore = useUserStore()
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// 判断“消息列表”滚动的位置(用于判断是否需要滚动到消息最下方)
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const messageContainer: any = ref(null)
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const isScrolling = ref(false) //用于判断用户是否在滚动
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// 定义 props
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const props = defineProps({
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conversation: {
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type: Object as PropType<ChatConversationVO>,
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required: true
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},
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list: {
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type: Array as PropType<ChatMessageVO[]>,
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required: true
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}
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})
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const { list } = toRefs(props) // 消息列表
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const emits = defineEmits(['onDeleteSuccess', 'onRefresh', 'onEdit']) // 定义 emits
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// ============ 处理对话滚动 ==============
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/** 滚动到底部 */
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const scrollToBottom = async (isIgnore?: boolean) => {
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// 注意要使用 nextTick 以免获取不到 dom
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await nextTick()
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if (isIgnore || !isScrolling.value) {
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messageContainer.value.scrollTop =
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messageContainer.value.scrollHeight - messageContainer.value.offsetHeight
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}
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}
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function handleScroll() {
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const scrollContainer = messageContainer.value
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const scrollTop = scrollContainer.scrollTop
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const scrollHeight = scrollContainer.scrollHeight
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const offsetHeight = scrollContainer.offsetHeight
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if (scrollTop + offsetHeight < scrollHeight - 100) {
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// 用户开始滚动并在最底部之上，取消保持在最底部的效果
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isScrolling.value = true
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} else {
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// 用户停止滚动并滚动到最底部，开启保持到最底部的效果
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isScrolling.value = false
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}
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}
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/** 回到底部 */
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const handleGoBottom = async () => {
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const scrollContainer = messageContainer.value
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scrollContainer.scrollTop = scrollContainer.scrollHeight
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}
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/** 回到顶部 */
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const handlerGoTop = async () => {
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const scrollContainer = messageContainer.value
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scrollContainer.scrollTop = 0
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}
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defineExpose({ scrollToBottom, handlerGoTop }) // 提供方法给 parent 调用
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// ============ 处理消息操作 ==============
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/** 复制 */
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const copyContent = async (content) => {
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await copy(content)
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message.success('复制成功！')
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}
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/** 删除 */
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const onDelete = async (id) => {
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// 删除 message
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await ChatMessageApi.deleteEnergyChatMessage(id)
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message.success('删除成功！')
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// 回调
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emits('onDeleteSuccess')
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}
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/** 刷新 */
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const onRefresh = async (message: ChatMessageVO) => {
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emits('onRefresh', message)
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}
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/** 编辑 */
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const onEdit = async (message: ChatMessageVO) => {
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emits('onEdit', message)
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}
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/** 初始化 */
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onMounted(async () => {
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messageContainer.value.addEventListener('scroll', handleScroll)
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})
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</script>
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<style scoped lang="scss">
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.message-container {
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position: relative;
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overflow-y: scroll;
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}
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// 中间
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.chat-list {
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display: flex;
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flex-direction: column;
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overflow-y: hidden;
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padding: 0 20px;
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.message-item {
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margin-top: 50px;
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}
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.left-message {
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display: flex;
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flex-direction: row;
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}
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.message {
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display: flex;
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flex-direction: column;
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text-align: left;
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height: 462px;
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.left-text-container {
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width: 855px;
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height: 462px;
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position: relative;
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display: flex;
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flex-direction: column;
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overflow-wrap: break-word;
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background: rgba(115,196,255,0.05);
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border-radius: 4px 4px 4px 4px;
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border-left: 1px solid #73C4FF;
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padding: 10px 10px 5px 10px;
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.left-text {
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font-weight: 400;
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font-size: 14px;
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color: rgba(219,238,255,0.6);
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}
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}
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}
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// 复制、删除按钮
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.btn-cus {
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display: flex;
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background-color: transparent;
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align-items: center;
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.btn-image {
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height: 20px;
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}
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}
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.btn-cus:hover {
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cursor: pointer;
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background-color: #f6f6f6;
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}
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}
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// 回到底部
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.to-bottom {
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position: absolute;
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z-index: 1000;
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bottom: 0;
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right: 50%;
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}
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</style>
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