<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->
<!-- Created by Tw93 on 17/10/31. -->
<!-- 处理android上面有点击时候事件不传递问题!-->
<!--需要是wxc-ep-slider组件中接受wxcPanItemPan，事件同时判断是android下调用bindExp-->

<template>
  <div>
    <div v-if="supportAndroid"
         ref="wxc-pan-item"
         @horizontalpan="dispatchPan"
         @appear="onItemAppear"
         @disappear="onItemDisAppear"
         @click="itemClicked">
      <slot></slot>
    </div>
    <div v-else
         ref="wxc-pan-item"
         @click="itemClicked">
      <slot></slot>
    </div>
  </div>
</template>

<script>
  import Binding from 'weex-bindingx/lib/index.weex.js';
  import Utils from '../utils';
  import BindEnv from '../utils/bind-env';

  export default {
    props: {
      url: {
        type: String,
        default: ''
      },
      needSlider: {
        type: Boolean,
        default: true
      },
    },
    data: () => ({
      isPanning: false,
      appearMap: [],
      supportAndroid: BindEnv.supportsEBForAndroid()
    }),
    mounted () {
      setTimeout(() => {
        if (this.supportAndroid && this.needSlider) {
          const element = this.$refs['wxc-pan-item'];
          Binding.prepare && Binding.prepare({
            anchor: element.ref,
            eventType: 'pan'
          });
        }
      }, 300)
    },
    methods: {
      itemClicked () {
        if (this.isPanning) {
          return;
        }
        this.url && Utils.goToH5Page(this.url, true);
        this.$emit('wxcPanItemClicked', { extId: this.extId });
      },

      dispatchPan (e) {
        if (this.supportAndroid && this.needSlider) {
          if (e.state === 'start') {
            this.isPanning = true;
            const element = this.$refs['wxc-pan-item'];
            element && this.$emit('wxcPanItemPan', { element, extId: this.extId });
          } else if (e.state === 'end') {
            setTimeout(() => {
              this.isPanning = false;
            }, 50);
          }
        }
      }
    }
  };
</script>