topfans/frontend/pages/components/NftCard.vue

<template>
	<view 
		class="nft-card" 
		:class="{ 'clickable': coverImage && !locked }"
		:style="cardStyle"
		@click="handleCardClick"
	>
		<view class="nft-border-wrapper">
			<image 
				class="nft-border" 
				:class="{ 'nft-border-empty': !coverImage }"
				src="/static/nft/border.png" 
				mode="aspectFit"
			></image>
			<view class="nft-cover-wrapper" v-if="coverImage">
				<image class="nft-cover" :src="currentImage" mode="aspectFill" @error="onImageError"></image>
			</view>
			<!-- 展馆页面中，没有封面且可添加时显示添加按钮 -->
			<view class="add-button-wrapper" v-if="!coverImage && showAddButton && !locked && operation === 'place'" @click="handleAddClick">
				<image class="add-button-icon" src="/static/icon/add.png" mode="aspectFit"></image>
			</view>
			<!-- 锁定状态蒙层 -->
			<view class="locked-overlay" v-if="locked">
				<image class="lock-icon" src="/static/icon/lock.png" mode="aspectFit"></image>
			</view>
		</view>
	</view>
</template>

<script setup>
import { ref, computed, watch } from 'vue';

// 定义 props
const props = defineProps({
	// 藏品封面图片路径
	coverImage: {
		type: String,
		default: '/static/nft/collection.png'
	},
	// 藏品卡片宽度（单位：px）
	width: {
		type: [Number, String],
		default: 100
	},
	// 藏品卡片高度（单位：px）
	height: {
		type: [Number, String],
		default: 100
	},
	// 自定义样式对象
	customStyle: {
		type: Object,
		default: () => ({})
	},
	// 是否显示添加按钮（用于展馆页面）
	showAddButton: {
		type: Boolean,
		default: false
	},
	// 槽位可见性：public-公开 | private-私有
	visibility: {
		type: String,
		default: 'public'
	},
	// 操作类型：place-可添加 | remove-可移除 | none-不可操作
	operation: {
		type: String,
		default: 'none'
	},
	// 是否锁定（用于星册页面）
	locked: {
		type: Boolean,
		default: false
	}
});

// 定义 emit
const emit = defineEmits(['click', 'imageError', 'add']);

// 默认图片路径
const DEFAULT_IMAGE = '/static/nft/collection.png';

// 当前显示的图片路径
const currentImage = ref(props.coverImage || DEFAULT_IMAGE);

// 监听 coverImage 变化
watch(() => props.coverImage, (newValue) => {
	currentImage.value = newValue || DEFAULT_IMAGE;
});

// 计算卡片样式
const cardStyle = computed(() => {
	const baseStyle = {
		width: typeof props.width === 'number' ? `${props.width}px` : props.width,
		height: typeof props.height === 'number' ? `${props.height}px` : props.height
	};
	
	return {
		...baseStyle,
		...props.customStyle
	};
});

// 图片加载失败处理
const onImageError = (e) => {
	console.error('藏品图片加载失败，使用默认图片');
	// 如果不是默认图片加载失败，则fallback到默认图片
	if (currentImage.value !== DEFAULT_IMAGE) {
		currentImage.value = DEFAULT_IMAGE;
	}
	emit('imageError', e);
};

// 卡片点击处理
const handleCardClick = () => {
	if (props.coverImage && !props.locked) {
		emit('click');
	}
};

// 添加按钮点击处理
const handleAddClick = () => {
	emit('add');
};
</script>

<style scoped>
.nft-card {
	position: absolute;
	display: block;
	pointer-events: none;
	transition: transform 0.2s ease;
}

.nft-card.clickable {
	pointer-events: auto;
	cursor: pointer;
}

.nft-card.clickable:active {
	transform: scale(0.95);
}

.nft-border-wrapper {
	position: relative;
	width: 100%;
	height: 100%;
}

.nft-border {
	width: 100%;
	height: 100%;
	display: block;
	z-index: 5;
	position: relative;
}

/* 封面为空时边框的阴影效果 */
.nft-border-empty {
	filter: drop-shadow(0 8rpx 8rpx rgba(0, 0, 0, 0.85));
}

.nft-cover-wrapper {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	/* 根据边框的3:4比例，计算封面区域的实际尺寸 */
	/* 使用 65% 让显示区域比边框空白区域略小，确保图片不会超出边框 */
	width: 70%;
	/* 高度根据3:4比例计算：宽度的 4/3 倍 */
	height: 100%; /* 65% * 4/3 = 86.67% */
	overflow: hidden;
	/* 容器圆角处理 */
	border-radius: 16rpx;
	z-index: 1;
	/* 确保容器本身不会超出 */
	box-sizing: border-box;
}

.nft-cover {
	/* 确保图片完全填满容器，无论原始比例如何 */
	width: 100%;
	height: 100%;
	display: block;
	/* 图片圆角处理，与容器保持一致 */
	border-radius: 16rpx;
	z-index: 2;
}

/* 添加按钮容器 */
.add-button-wrapper {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	width: 40%;
	height: 40%;
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 3;
	pointer-events: auto;
}

/* 添加按钮图标 */
.add-button-icon {
	width: 100%;
	height: 100%;
	display: block;
	object-fit: contain;
	filter: drop-shadow(0 8rpx 8rpx rgba(0, 0, 0, 0.85));
}

/* 锁定状态蒙层 */
.locked-overlay {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	width: 70%;
	height: 100%;
	background: rgba(0, 0, 0, 0.6);
	border-radius: 16rpx;
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 4;
}

/* 锁图标 */
.lock-icon {
	width: 40%;
	height: 40%;
	display: block;
	object-fit: contain;
}
</style>