aiot-app/uni_modules/uni-data-select/components/uni-data-select/uni-data-select.vue

<template>
  <view class="uni-stat__select">
    <span v-if="label" class="uni-label-text hide-on-phone">{{
      label + '：'
    }}</span>
    <view class="uni-stat-box" :class="{ 'uni-stat__actived': current }">
      <view class="uni-select" :class="{ 'uni-select--disabled': disabled }">
        <view class="uni-select__input-box" @click="toggleSelector">
          <view v-if="current" class="uni-select__input-text">{{
            current
          }}</view>
          <view
            v-else
            class="uni-select__input-text uni-select__input-placeholder"
            >{{ typePlaceholder }}</view
          >
          <uni-icons
            v-if="current && clear && !disabled"
            type="clear"
            color="#c0c4cc"
            size="24"
            @click="clearVal"
          />
          <uni-icons
            v-else
            :type="showSelector ? 'top' : 'bottom'"
            size="14"
            color="#999"
          />
        </view>
        <view
          class="uni-select--mask"
          v-if="showSelector"
          @click="toggleSelector"
        />
        <view class="uni-select__selector" v-if="showSelector">
          <view class="uni-popper__arrow"></view>
          <scroll-view scroll-y="true" class="uni-select__selector-scroll">
            <view
              class="uni-select__selector-empty"
              v-if="mixinDatacomResData.length === 0"
            >
              <text>{{ emptyTips }}</text>
            </view>
            <view
              v-else
              class="uni-select__selector-item"
              v-for="(item, index) in mixinDatacomResData"
              :key="index"
              @click="change(item)"
            >
              <text
                :class="{ 'uni-select__selector__disabled': item.disable }"
                >{{ formatItemName(item) }}</text
              >
            </view>
          </scroll-view>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
/**
 * DataChecklist 数据选择器
 * @description 通过数据渲染的下拉框组件
 * @tutorial https://uniapp.dcloud.io/component/uniui/uni-data-select
 * @property {String} value 默认值
 * @property {Array} localdata 本地数据 ，格式 [{text:'',value:''}]
 * @property {Boolean} clear 是否可以清空已选项
 * @property {Boolean} emptyText 没有数据时显示的文字 ，本地数据无效
 * @property {String} label 左侧标题
 * @property {String} placeholder 输入框的提示文字
 * @property {Boolean} disabled 是否禁用
 * @event {Function} change  选中发生变化触发
 */

export default {
  name: 'uni-stat-select',
  mixins: [uniCloud.mixinDatacom || {}],
  props: {
    localdata: {
      type: Array,
      default () {
        return []
      }
    },
    value: {
      type: [String, Number],
      default: ''
    },
    modelValue: {
      type: [String, Number],
      default: ''
    },
    label: {
      type: String,
      default: ''
    },
    placeholder: {
      type: String,
      default: '请选择'
    },
    emptyTips: {
      type: String,
      default: '无选项'
    },
    clear: {
      type: Boolean,
      default: true
    },
    defItem: {
      type: Number,
      default: 0
    },
    disabled: {
      type: Boolean,
      default: false
    },
    // 格式化输出 用法 field="_id as value, version as text, uni_platform as label" format="{label} - {text}"
    format: {
      type: String,
      default: ''
    }
  },
  data () {
    return {
      showSelector: false,
      current: '',
      mixinDatacomResData: [],
      apps: [],
      channels: [],
      cacheKey: 'uni-data-select-lastSelectedValue'
    }
  },
  created () {
    this.debounceGet = this.debounce(() => {
      this.query()
    }, 300)
    if (this.collection && !this.localdata.length) {
      this.debounceGet()
    }
  },
  computed: {
    typePlaceholder () {
      const text = {
        'opendb-stat-app-versions': '版本',
        'opendb-app-channels': '渠道',
        'opendb-app-list': '应用'
      }
      const common = this.placeholder
      const placeholder = text[this.collection]
      return placeholder ? common + placeholder : common
    },
    valueCom () {
      // #ifdef VUE3
      return this.modelValue
      // #endif
      // #ifndef VUE3
      return this.value
      // #endif
    }
  },
  watch: {
    localdata: {
      immediate: true,
      handler (val, old) {
        if (Array.isArray(val) && old !== val) {
          this.mixinDatacomResData = val
        }
      }
    },
    valueCom (val, old) {
      this.initDefVal()
    },
    mixinDatacomResData: {
      immediate: true,
      handler (val) {
        if (val.length) {
          this.initDefVal()
        }
      }
    }
  },
  methods: {
    debounce (fn, time = 100) {
      let timer = null
      return function (...args) {
        if (timer) clearTimeout(timer)
        timer = setTimeout(() => {
          fn.apply(this, args)
        }, time)
      }
    },
    // 执行数据库查询
    query () {
      this.mixinDatacomEasyGet()
    },
    // 监听查询条件变更事件
    onMixinDatacomPropsChange () {
      if (this.collection) {
        this.debounceGet()
      }
    },
    initDefVal () {
      let defValue = ''
      if (
        (this.valueCom || this.valueCom === 0) &&
        !this.isDisabled(this.valueCom)
      ) {
        defValue = this.valueCom
      } else {
        let strogeValue
        if (this.collection) {
          strogeValue = this.getCache()
        }
        if (strogeValue || strogeValue === 0) {
          defValue = strogeValue
        } else {
          let defItem = ''
          if (
            this.defItem > 0 &&
            this.defItem <= this.mixinDatacomResData.length
          ) {
            defItem = this.mixinDatacomResData[this.defItem - 1].value
          }
          defValue = defItem
        }
        if (defValue || defValue === 0) {
          this.emit(defValue)
        }
      }
      const def = this.mixinDatacomResData.find(item => item.value === defValue)
      this.current = def ? this.formatItemName(def) : ''
    },

    /**
     * @param {[String, Number]} value
     * 判断用户给的 value 是否同时为禁用状态
     */
    isDisabled (value) {
      let isDisabled = false

      this.mixinDatacomResData.forEach(item => {
        if (item.value === value) {
          isDisabled = item.disable
        }
      })

      return isDisabled
    },

    clearVal () {
      this.emit('')
      if (this.collection) {
        this.removeCache()
      }
    },
    change (item) {
      if (!item.disable) {
        this.showSelector = false
        this.current = this.formatItemName(item)
        this.emit(item.value)
      }
    },
    emit (val) {
      this.$emit('change', val)
      this.$emit('input', val)
      this.$emit('update:modelValue', val)
      if (this.collection) {
        this.setCache(val)
      }
    },
    toggleSelector () {
      if (this.disabled) {
        return
      }

      this.showSelector = !this.showSelector
    },
    formatItemName (item) {
      let { text, value, channel_code } = item
      channel_code = channel_code ? `(${channel_code})` : ''

      if (this.format) {
        // 格式化输出
        let str = ''
        str = this.format
        for (let key in item) {
          str = str.replace(new RegExp(`{${key}}`, 'g'), item[key])
        }
        return str
      } else {
        return this.collection.indexOf('app-list') > 0
          ? `${text}(${value})`
          : text
          ? text
          : `未命名${channel_code}`
      }
    },
    // 获取当前加载的数据
    getLoadData () {
      return this.mixinDatacomResData
    },
    // 获取当前缓存key
    getCurrentCacheKey () {
      return this.collection
    },
    // 获取缓存
    getCache (name = this.getCurrentCacheKey()) {
      let cacheData = uni.getStorageSync(this.cacheKey) || {}
      return cacheData[name]
    },
    // 设置缓存
    setCache (value, name = this.getCurrentCacheKey()) {
      let cacheData = uni.getStorageSync(this.cacheKey) || {}
      cacheData[name] = value
      uni.setStorageSync(this.cacheKey, cacheData)
    },
    // 删除缓存
    removeCache (name = this.getCurrentCacheKey()) {
      let cacheData = uni.getStorageSync(this.cacheKey) || {}
      delete cacheData[name]
      uni.setStorageSync(this.cacheKey, cacheData)
    }
  }
}
</script>

<style lang="scss">
$uni-base-color: #6a6a6a !default;
$uni-main-color: #333 !default;
$uni-secondary-color: #909399 !default;
$uni-border-3: #e5e5e5;

/* #ifndef APP-NVUE */
@media screen and (max-width: 500px) {
  .hide-on-phone {
    display: none;
  }
}

/* #endif */
.uni-stat__select {
  display: flex;
  align-items: center;
  // padding: 15px;
  cursor: pointer;
  width: 100%;
  flex: 1;
  box-sizing: border-box;
}

.uni-stat-box {
  width: 100%;
  flex: 1;
}

.uni-stat__actived {
  width: 100%;
  flex: 1;
  // outline: 1px solid #2979ff;
}

.uni-label-text {
  font-size: 32rpx;
  font-weight: bold;
  color: $uni-base-color;
  margin: auto 0;
  margin-right: 5px;
}

.uni-select {
  font-size: 32rpx;
  border: 1px solid $uni-border-3;
  box-sizing: border-box;
  border-radius: 4px;
  padding: 0 5px;
  padding-left: 10px;
  position: relative;
  /* #ifndef APP-NVUE */
  display: flex;
  user-select: none;
  /* #endif */
  flex-direction: row;
  align-items: center;
  border-bottom: solid 1px $uni-border-3;
  width: 100%;
  flex: 1;
  height: 35px;

  &--disabled {
    background-color: #f5f7fa;
    cursor: not-allowed;
  }
}

.uni-select__label {
  font-size: 16px;
  // line-height: 22px;
  height: 35px;
  padding-right: 10px;
  color: $uni-secondary-color;
}

.uni-select__input-box {
  height: 35px;
  position: relative;
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex: 1;
  flex-direction: row;
  align-items: center;
}

.uni-select__input {
  flex: 1;
  font-size: 32rpx;
  height: 22px;
  line-height: 22px;
}

.uni-select__input-plac {
  font-size: 32rpx;
  color: $uni-secondary-color;
}

.uni-select__selector {
  /* #ifndef APP-NVUE */
  box-sizing: border-box;
  /* #endif */
  position: absolute;
  top: calc(100% + 12px);
  left: 0;
  width: 100%;
  background-color: #ffffff;
  border: 1px solid #ebeef5;
  border-radius: 6px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  z-index: 3;
  padding: 4px 0;
}

.uni-select__selector-scroll {
  /* #ifndef APP-NVUE */
  max-height: 200px;
  box-sizing: border-box;
  /* #endif */
}

.uni-select__selector-empty,
.uni-select__selector-item {
  /* #ifndef APP-NVUE */
  display: flex;
  cursor: pointer;
  /* #endif */
  line-height: 35px;
  font-size: 32rpx;
  text-align: center;
  /* border-bottom: solid 1px $uni-border-3; */
  padding: 0px 10px;
}

.uni-select__selector-item:hover {
  background-color: #f9f9f9;
}

.uni-select__selector-empty:last-child,
.uni-select__selector-item:last-child {
  /* #ifndef APP-NVUE */
  border-bottom: none;
  /* #endif */
}

.uni-select__selector__disabled {
  opacity: 0.4;
  cursor: default;
}

/* picker 弹出层通用的指示小三角 */
.uni-popper__arrow,
.uni-popper__arrow::after {
  position: absolute;
  display: block;
  width: 0;
  height: 0;
  border-color: transparent;
  border-style: solid;
  border-width: 6px;
}

.uni-popper__arrow {
  filter: drop-shadow(0 2px 12px rgba(0, 0, 0, 0.03));
  top: -6px;
  left: 10%;
  margin-right: 3px;
  border-top-width: 0;
  border-bottom-color: #ebeef5;
}

.uni-popper__arrow::after {
  content: ' ';
  top: 1px;
  margin-left: -6px;
  border-top-width: 0;
  border-bottom-color: #fff;
}

.uni-select__input-text {
  // width: 280px;
  width: 100%;
  color: $uni-main-color;
  white-space: nowrap;
  text-overflow: ellipsis;
  -o-text-overflow: ellipsis;
  overflow: hidden;
}

.uni-select__input-placeholder {
  color: $uni-base-color;
  font-size: 12px;
}

.uni-select--mask {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
}
</style>