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<template>
	<view class="msg-item">
		<view class="create_time-box">
			<uni-dateformat class="create_time" :date="msg.create_time" format="MM/dd hh:mm:ss"></uni-dateformat>
		</view>
		<view :class="{reverse:!msg.isAi}">
			<view class="userInfo">
				<image class="avatar" :src="msg.isAi?'../../static/uni-ai.png':'../../static/avatar.png'" mode="widthFix"></image>
			</view>
			<view class="content">
				<view class="rich-text-box" :class="{'show-cursor':showCursor}" ref="rich-text-box">
					<rich-text v-if="nodes&&nodes.length" space="nbsp" :nodes="nodes" @itemclick="trOnclick"></rich-text>

					<!-- #ifdef H5 -->
					<view class="copy-box" :style="{left,top}">
						<text class="copy" @click="copy">复制</text>
					</view>
					<!-- #endif -->
				</view>
				<view v-if="isLastMsg && adpid && msg.insufficientScore">
					<text style="color: red;">
						默认不启用广告组件(被注释),如需使用,请"去掉注释"(“重新运行”后生效)
						位置:/components/uni-ai-msg/uni-ai-msg.vue 第28行,或全局搜索 uni-ad-rewarded-video
					</text>
					<!-- <uni-ad-rewarded-video :adpid="adpid" @onAdClose="onAdClose"></uni-ad-rewarded-video> -->
				</view>
			</view>
			<uni-icons v-if="isLastMsg && !msg.isAi && msg.state != 100 && msgStateIcon(msg)"
				@click="msg.state == -100 ? retriesSendMsg() : ''" :color="msg.state===0?'#999':'#d22'"
				:type="msgStateIcon(msg)" class="msgStateIcon">
			</uni-icons>
		</view>
	</view>
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</template>

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<script>
	// 引入配置文件
	import config from '@/config.js';

	// 获取广告id
	const {
		adpid
	} = config

	import {
		msgList
	} from '@/pages/chat/msgList.js';

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	// 引入markdown-it库
	import MarkdownIt from '@/lib/markdown-it.min.js';

	// hljs是由 Highlight.js 经兼容性修改后的文件,请勿直接升级。否则会造成uni-app-vue3-Android下有兼容问题
	import hljs from "@/lib/highlight/highlight-uni.min.js";

	// 引入html-parser.js库
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	import parseHtml from '@/lib/html-parser.js';
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	// console.log('hljs--',hljs);
	// console.log('hljs--',hljs.getLanguage('js'));
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	// 为复制代码功能保留代码内容
	let codeDataList = []
	
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	// 初始化 MarkdownIt库
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	const markdownIt = MarkdownIt({
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		// 在源码中启用 HTML 标签
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		html: true,
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		// 如果结果以 <pre ... 开头内部包装器则会跳过
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		highlight: function(str, lang) {
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			// if (lang && hljs.getLanguage(lang)) {
			// 	console.error('lang', lang)
			// 	try {
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			// 		return '<pre class="hljs" style="padding: 5px 8px;margin: 5px 0;overflow: auto;display: block;"><code>' +
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			// 			hljs.highlight('lang', str, true).value +
			// 			'</code></pre>';
			// 	} catch (__) {}
			// }
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			// 经过highlight.js处理后的html
			let preCode = ""
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			try {
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				preCode = hljs.highlightAuto(str).value
			} catch (err) {
				// console.log('err',err);
				preCode = markdownIt.utils.escapeHtml(str);
			}
			
			// 以换行进行分割
			const lines = preCode.split(/\n/).slice(0, -1)
			// 添加自定义行号
			let html = lines.map((item, index) => {
				// 去掉空行
				if( item == ''){
					return ''
				}
				return '<li><span class="line-num" data-line="' + (index + 1) + '"></span>' + item +'</li>'
			}).join('')
			html = '<ol>' + html + '</ol>'
			
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			// 代码复制功能
			codeDataList.push(str)
			html = `<a class="copy-btn" code-data-index="${codeDataList.length - 1}" style="float:right;cursor: pointer;">复制</a>` + html
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			return `<pre class="hljs" style="padding: 5px 8px;margin: 5px 0;overflow: auto;display: block;"><code>${html}</code></pre>`;
		}
	})
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	export default {
		name: "msg",
		data() {
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			return {
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				// 悬浮的复制按钮的左边距
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				left: "-100px",
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				// 悬浮的复制按钮的上边距
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				top: "-100px",
				msg: {
					content: ""
				},
				msgIndexList: 0,
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				adpid
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			};
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		},
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		mounted() {
			// #ifdef H5
			// web端限制不选中文字时出现系统右键菜单
			let richTextBox = this.$refs['rich-text-box']
			if (richTextBox) {
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				// 监听鼠标右键事件
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				richTextBox.$el.addEventListener('contextmenu', (e) => {
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					// 判断是否选中了文字内容,如果没有则限制系统默认行为(禁止弹出右键菜单)
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					if (!document.getSelection().toString()) {
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						// console.log(e);
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						// 设置悬浮的复制按钮的坐标值
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						this.top = e.y + 'px'
						this.left = e.x + 'px'

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						// console.log(e.x);
						// console.log(e.y);
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						// 禁止系统默认行为(禁止弹出右键菜单)
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						e.preventDefault()
					}
				})
			}
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			// 监听全局点击事件,隐藏悬浮的复制按钮的坐标
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			document.addEventListener('click', () => {
				this.left = "-100px"
			})
			// #endif
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		},
		created() {
			this.msg = msgList[this.msgIndex]
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		},
		props: {
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			// 是否显示鼠标闪烁的效果
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			showCursor: {
				type: [Boolean, Number],
				default () {
					return false
				}
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			},
			msgIndex: {
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				type: Number,
				default () {
					return false
				}
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			},
			isLastMsg: {
				type: Boolean,
				default () {
					return false
				}
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			}
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		},
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		computed: {
			md() {
				return this.msg.content
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			},
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			nodes() {
				let htmlString = ''
				// 修改转换结果的htmlString值 用于正确给界面增加鼠标闪烁的效果
				// 判断markdown中代码块标识符的数量是否为偶数
				if (this.md.split("```").length % 2) {
					htmlString = markdownIt.render(this.md + ' \n <span class="cursor">|</span>');
				} else {
					htmlString = markdownIt.render(this.md) + ' \n <span class="cursor">|</span>';
				}

				// #ifndef APP-NVUE
				return htmlString
				// #endif

				// nvue模式下将htmlString转成htmlArray,其他情况rich-text内部转
				// 注:本示例项目还没使用nvue编译

				// #ifdef APP-NVUE
				return parseHtml(htmlString)
				// #endif
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			}
		},
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		methods: {
			// 根据消息状态返回对应的图标
			msgStateIcon(msg) {
				switch (msg.state) {
					case 0:
						//	发送中
						return 'spinner-cycle'
						break;
					case -100:
						//	发送失败
						return 'refresh-filled'
						break;
					case -200:
						//	禁止发送(内容不合法)
						return 'info-filled'
						break;
					default:
						// 默认不返回任何图标
						return false
						break;
				}
			},
			trOnclick(e){
				// console.log(e);
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				let {attrs} = e.detail.node
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				// console.log({attrs});
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				let {"code-data-index":codeDataIndex,"class":className} = attrs
				if(className == 'copy-btn'){
					// console.log('codeDataList[codeDataIndex]',codeDataList[codeDataIndex]);
					uni.setClipboardData({
						data:codeDataList[codeDataIndex],
						showToast:false,
						success() {
							uni.showToast({
								title: '复制成功',
								icon: 'none'
							});
						}
					})
				}
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			},
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			// #ifdef H5
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			// 复制文本内容到系统剪切板
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			copy() {
				uni.setClipboardData({
					data: this.md,
					showToast: false,
				})
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				// 设置悬浮的复制按钮的坐标值,使其隐藏
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				this.left = "-100px"
			}
			// #endif
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		}
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	}
</script>

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<style lang="scss">
	/* #ifndef APP-NVUE */
	view,
	textarea,
	button,
	.page {
		display: flex;
		box-sizing: border-box;
	}

	/* #endif */

	.userInfo {
		flex-direction: column;
	}

	.msg-item {
		position: relative;
		width: 750rpx;
		flex-direction: column;
		padding: 0 15px;
		padding-bottom: 15px;
	}

	.msgStateIcon {
		position: relative;
		top: 5px;
		right: 5px;
		align-self: center;
	}

	.avatar {
		width: 40px;
		height: 40px;
		border-radius: 2px;
	}

	.create_time {
		font-size: 12px;
		padding: 5px 0;
		padding-top: 0;
		color: #aaa;
		text-align: center;
		width: 750rpx;
		/* #ifdef MP */
		display: flex;
		/* #endif */
		justify-content: center;
	}

	.content {
		/* #ifndef APP-NVUE */
		max-width: 85%;
		/* #endif */
		background-color: #FFF;
		border-radius: 5px;
		padding: 12px 10px;
		margin-left: 10px;
		/* #ifndef APP-NVUE */
		word-break: break-all;
		user-select: text;
		cursor: text;
		/* #endif */
	}

	/* #ifndef APP-NVUE */
	.content ::v-deep rich-text {
		max-width: 100%;
		overflow: auto;
	}
	code .l:before {
		color: #516363;
		position: absolute;
		left: 15px;
		content: counter(step);
		counter-increment: step;
	}
	/* #endif */


	.reverse {
		flex-direction: row-reverse;
	}

	.reverse .content {
		margin-left: 0;
		margin-right: 10px;
	}

	.reverse-align {
		align-items: flex-end;
	}

	.create_time-box {
		margin-top: 15px;
		justify-content: center;
	}


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	/* #ifndef VUE3 && APP-PLUS */
	@import "@/components/uni-ai-msg/uni-ai-msg.scss";
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	/* #endif */
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</style>