<template>
<uni-shadow-root class="vant-dist-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 v-if="range" :class="utils.bem('slider__button-wrapper-left')" :data-index="0" @touchstart="onTouchStart" @touchmove.stop.prevent="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd">
      <slot v-if="useButtonSlot" name="left-button"></slot>
      <view v-else :class="utils.bem('slider__button')"></view>
    </view>
    <view v-if="range" :class="utils.bem('slider__button-wrapper-right')" :data-index="1" @touchstart="onTouchStart" @touchmove.stop.prevent="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd">
      <slot v-if="useButtonSlot" name="right-button"></slot>
      <view v-else :class="utils.bem('slider__button')"></view>
    </view>

    <view v-if="(!range)" :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/dist/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: {
        range: Boolean,
        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: null,
            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;
            const { index } = event.currentTarget.dataset;
            if (typeof index === 'number') {
                this.buttonIndex = index;
            }
            this.touchStart(event);
            this.startValue = this.format(this.value);
            this.newValue = this.value;
            if (this.isRange(this.newValue)) {
                this.startValue = this.newValue.map((val) => this.format(val));
            }
            else {
                this.startValue = this.format(this.newValue);
            }
            this.dragStatus = 'start';
        },
        onTouchMove(event) {
            if (this.data.disabled)
                return;
            if (this.dragStatus === 'start') {
                this.$emit('drag-start');
            }
            this.touchMove(event);
            this.dragStatus = 'draging';
            getRect(this, '.van-slider').then((rect) => {
                const diff = (this.deltaX / rect.width) * this.getRange();
                if (this.isRange(this.startValue)) {
                    this.newValue[this.buttonIndex] =
                        this.startValue[this.buttonIndex] + diff;
                }
                else {
                    this.newValue = this.startValue + diff;
                }
                this.updateValue(this.newValue, false, true);
            });
        },
        onTouchEnd() {
            if (this.data.disabled)
                return;
            if (this.dragStatus === 'draging') {
                this.updateValue(this.newValue, true);
                this.$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;
                if (this.isRange(this.value)) {
                    const [left, right] = this.value;
                    const middle = (left + right) / 2;
                    if (value <= middle) {
                        this.updateValue([value, right], true);
                    }
                    else {
                        this.updateValue([left, value], true);
                    }
                }
                else {
                    this.updateValue(value, true);
                }
            });
        },
        isRange(val) {
            const { range } = this.data;
            return range && Array.isArray(val);
        },
        handleOverlap(value) {
            if (value[0] > value[1]) {
                return value.slice(0).reverse();
            }
            return value;
        },
        updateValue(value, end, drag) {
            if (this.isRange(value)) {
                value = this.handleOverlap(value).map((val) => this.format(val));
            }
            else {
                value = this.format(value);
            }
            this.value = value;
            this.setData({
                barStyle: `
          width: ${this.calcMainAxis()};
          left: ${this.isRange(value) ? `${value[0]}%` : 0};
          ${drag ? 'transition: none;' : ''}
        `,
            });
            if (drag) {
                this.$emit('drag', { value });
            }
            if (end) {
                this.$emit('change', value);
            }
            if ((drag || end) && canIUseModel()) {
                this.setData({ value });
            }
        },
        getScope() {
            return Number(this.data.max) - Number(this.data.min);
        },
        getRange() {
            const { max, min } = this.data;
            return max - min;
        },
        // 计算选中条的长度百分比
        calcMainAxis() {
            const { value } = this;
            const { min } = this.data;
            const scope = this.getScope();
            if (this.isRange(value)) {
                return `${((value[1] - value[0]) * 100) / scope}%`;
            }
            return `${((value - Number(min)) * 100) / scope}%`;
        },
        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/dist/slider/index']
</script>
<style platform="mp-weixin">
@import '../common/index.css';.van-slider{position:relative;height:2px;height:var(--slider-bar-height,2px);border-radius:999px;border-radius:var(--border-radius-max,999px);background-color:#ebedf0;background-color:var(--slider-inactive-background-color,#ebedf0)}.van-slider:before{position:absolute;right:0;left:0;content:"";top:-8px;top:-var(--padding-xs,8px);bottom:-8px;bottom:-var(--padding-xs,8px)}.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:24px;width:var(--slider-button-width,24px);height:24px;height:var(--slider-button-height,24px);border-radius:50%;border-radius:var(--slider-button-border-radius,50%);box-shadow:0 1px 2px rgba(0,0,0,.5);box-shadow:var(--slider-button-box-shadow,0 1px 2px rgba(0,0,0,.5));background-color:#fff;background-color:var(--slider-button-background-color,#fff)}.van-slider__button-wrapper,.van-slider__button-wrapper-right{position:absolute;top:50%;right:0;transform:translate3d(50%,-50%,0)}.van-slider__button-wrapper-left{position:absolute;top:50%;left:0;transform:translate3d(-50%,-50%,0)}.van-slider--disabled{opacity:.5;opacity:var(--slider-disabled-opacity,.5)}
</style>