qs_xinchun2026_h5/components/CoupletDisplay.vue

<template>
  <div class="couplet-display-modal" v-if="visible">
    <div class="modal-overlay"></div>
    <div class="modal-content couplet-content">
      <div class="modal-body">
        <div class="couplet-display">
          <!-- 显示海报图片（后端直接返回） -->
          <div class="poster-image" v-if="couplet?.image_url">
            <!-- 加载提示 -->
            <div class="image-loading" v-if="isLoading">
              <div class="loading-spinner"></div>
              <div class="loading-text">海报加载中...</div>
            </div>
            <img 
              :src="base64Image" 
              alt="春联海报" 
              style="width: 100%; max-width: 300px; height: auto;" 
              @load="isLoading = false"
              @error="isLoading = false"
            />
          </div>
        </div>

      </div>
    </div>
    <div class="close-button-area">
      <div class="share-hint">长按海报分享</div>

      <img 
        src="/static/images/btn_close.png" 
        class="close-button-image" 
        @click="$emit('close')"
      />
    </div>
  </div>
</template>

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

const props = defineProps({
  visible: {
    type: Boolean,
    default: false
  },
  couplet: {
    type: Object,
    default: () => ({
      share_url: '',
      image_url: ''
    })
  }
})

const emit = defineEmits(['close'])

// 图片加载状态
const isLoading = ref(true)
// base64格式的图片
const base64Image = ref('')

// 将图片URL转换为base64
const convertImageToBase64 = (imageUrl) => {
  if (!imageUrl) {
    base64Image.value = ''
    isLoading.value = false
    return
  }
  
  isLoading.value = true
  
  const img = new Image()
  img.crossOrigin = 'Anonymous' // 解决跨域问题
  
  img.onload = () => {
    const canvas = document.createElement('canvas')
    canvas.width = img.width
    canvas.height = img.height
    
    const ctx = canvas.getContext('2d')
    ctx.drawImage(img, 0, 0)
    
    // 将canvas转换为base64
    base64Image.value = canvas.toDataURL('image/jpeg', 0.9)
    isLoading.value = false
  }
  
  img.onerror = () => {
    console.error('图片加载失败:', imageUrl)
    base64Image.value = ''
    isLoading.value = false
  }
  
  img.src = imageUrl
}

// 监听couplet变化，重新开始加载
watch(() => props.couplet?.image_url, (newImageUrl) => {
  if (newImageUrl) {
    convertImageToBase64(newImageUrl)
  }
})

// 监听visible变化，当显示时重置加载状态
watch(() => props.visible, (newVisible) => {
  if (newVisible && props.couplet?.image_url) {
    convertImageToBase64(props.couplet.image_url)
  }
})

// 组件挂载时初始化
if (props.couplet?.image_url) {
  convertImageToBase64(props.couplet.image_url)
}
</script>

<style scoped>
.couplet-display-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
}

.modal-content {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
}

.couplet-content {
  overflow-y: auto;
}

.couplet-display {
  text-align: center;
}

.poster-image {
  position: relative;
  display: inline-block;
}

/* 图片加载提示 */
.image-loading {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 1;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #f3f3f3;
  border-top: 4px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 10px;
}

.loading-text {
  font-size: 14px;
  color: #333;
  text-align: center;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.share-hint {
  margin-bottom: 10rpx;
  font-size: 18px;
  color: #fff;
  text-align: center;

}

.close-button-area {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding-top: 20rpx;
  z-index: 99;
}

.close-button-image {
  width: 61rpx;
  height: 60rpx;
  cursor: pointer;
  transition: all 0.3s;
}

.close-button-image:hover {
  transform: scale(1.1);
}
</style>