<template>
<uni-shadow-root class="vant-slider-index"><view :class="'custom-class '+(utils.bem('slider', { disabled }))" :style="style({ background: inactiveColor, height: utils.addUnit(barHeight) })" @click="onClick">
  <view :class="utils.bem('slider__bar')" :style="(barStyle)+'; '+(style({ backgroundColor: activeColor }))">
    <view :class="utils.bem('slider__button-wrapper')" @touchstart="onTouchStart" @touchmove.stop.prevent="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd">
      <slot v-if="useButtonSlot" name="button"></slot>
      <view v-else :class="utils.bem('slider__button')"></view>
    </view>
  </view>
</view></uni-shadow-root>
</template>
<wxs src="../wxs/utils.wxs" module="utils"></wxs><wxs src="../wxs/style.wxs" module="style"></wxs>
<script>

global['__wxRoute'] = 'vant/slider/index'
import { VantComponent } from '../common/component';
import { touch } from '../mixins/touch';
import { canIUseModel } from '../common/version';
import { getRect } from '../common/utils';
VantComponent({
  mixins: [touch],
  props: {
    disabled: Boolean,
    useButtonSlot: Boolean,
    activeColor: String,
    inactiveColor: String,
    max: {
      type: Number,
      value: 100,
    },
    min: {
      type: Number,
      value: 0,
    },
    step: {
      type: Number,
      value: 1,
    },
    value: {
      type: Number,
      value: 0,
      observer(val) {
        if (val !== this.value) {
          this.updateValue(val);
        }
      },
    },
    barHeight: null,
  },
  created() {
    this.updateValue(this.data.value);
  },
  methods: {
    onTouchStart(event) {
      if (this.data.disabled) return;
      this.touchStart(event);
      this.startValue = this.format(this.value);
      this.dragStatus = 'start';
    },
    onTouchMove(event) {
      if (this.data.disabled) return;
      if (this.dragStatus === 'start') {
        this.$emit('drag-start');
      }
      this.touchMove(event);
      this.dragStatus = 'draging';
      getRect(this, '.van-slider').then((rect) => {
        const diff = (this.deltaX / rect.width) * this.getRange();
        this.newValue = this.startValue + diff;
        this.updateValue(this.newValue, false, true);
      });
    },
    onTouchEnd() {
      if (this.data.disabled) return;
      if (this.dragStatus === 'draging') {
        this.updateValue(this.newValue, true);
        this.$emit('drag-end');
      }
    },
    onClick(event) {
      if (this.data.disabled) return;
      const { min } = this.data;
      getRect(this, '.van-slider').then((rect) => {
        const value =
          ((event.detail.x - rect.left) / rect.width) * this.getRange() + min;
        this.updateValue(value, true);
      });
    },
    updateValue(value, end, drag) {
      value = this.format(value);
      const { min } = this.data;
      const width = `${((value - min) * 100) / this.getRange()}%`;
      this.value = value;
      this.setData({
        barStyle: `
          width: ${width};
          ${drag ? 'transition: none;' : ''}
        `,
      });
      if (drag) {
        this.$emit('drag', { value });
      }
      if (end) {
        this.$emit('change', value);
      }
      if ((drag || end) && canIUseModel()) {
        this.setData({ value });
      }
    },
    getRange() {
      const { max, min } = this.data;
      return max - min;
    },
    format(value) {
      const { max, min, step } = this.data;
      return Math.round(Math.max(min, Math.min(value, max)) / step) * step;
    },
  },
});
export default global['__wxComponents']['vant/slider/index']
</script>
<style platform="mp-weixin">
@import '../common/index.css';

.van-slider {
  position: relative;
  height: 4rpx;
  height: var(--slider-bar-height,4rpx);
  border-radius: 1998rpx;
  border-radius: var(--border-radius-max,1998rpx);
  background-color: #ebedf0;
  background-color: var(--slider-inactive-background-color,#ebedf0);
}

.van-slider:before {
  position: absolute;
  right: 0;
  left: 0;
  content: "";
  top: -16rpx;
  top: -var(--padding-xs,16rpx);
  bottom: -16rpx;
  bottom: -var(--padding-xs,16rpx);
}

.van-slider__bar {
  position: relative;
  width: 100%;
  height: 100%;
  background-color: #1989fa;
  background-color: var(--slider-active-background-color,#1989fa);
  border-radius: inherit;
  transition: all .2s;
  transition: all var(--animation-duration-fast,.2s);
}

.van-slider__button {
  width: 48rpx;
  width: var(--slider-button-width,48rpx);
  height: 48rpx;
  height: var(--slider-button-height,48rpx);
  border-radius: 50%;
  border-radius: var(--slider-button-border-radius,50%);
  box-shadow: 0 2rpx 4rpx rgba(0,0,0,.5);
  box-shadow: var(--slider-button-box-shadow,0 2rpx 4rpx rgba(0,0,0,.5));
  background-color: #fff;
  background-color: var(--slider-button-background-color,#fff);
}

.van-slider__button-wrapper {
  position: absolute;
  top: 50%;
  right: 0;
  -webkit-transform: translate3d(50%,-50%,0);
  transform: translate3d(50%,-50%,0);
}

.van-slider--disabled {
  opacity: .5;
  opacity: var(--slider-disabled-opacity,.5);
}
</style>