@charset "utf-8";
@import "yo-modal";

// 定义picker的基础构造
@mixin _picker {
    @include align;
    position: relative;
    overflow: hidden;
    height: map-get($picker, item-height) * map-get($picker, item);
    background-color: white;
    > .list {
        position: relative;
        @include flex;
        @include align-self(flex-start);
        width: 100%;
        text-align: center;
        > .item {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: map-get($picker, item-height);
            line-height: map-get($picker, item-height);
            padding: 0 .1rem;
            &.disabled {
                opacity: .4;
            }
        }
    }
    > .unit {
        display: block;
        &:last-child {
            padding-right: .1rem;
        }
    }
    > .mask {
        position: absolute;
        z-index: 3;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        content: "\0020";
        pointer-events: none;
        background: -webkit-linear-gradient(top, white, rgba(255, 255, 255, .4) 40%, rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, 0) 60.5%, rgba(255, 255, 255, .4) 60.5%, white);
    }
    &::before {
        position: absolute;
        top: 50%;
        left: 0;
        content: ".";
        color: transparent;
        border: 1px solid map-get($picker, border-color);
        border-width: 1px 0;
        @include responsive(retina1x) {
            width: 100%;
            height: map-get($picker, item-height);
            @include transform(translatey(-50%));
        }
        @include responsive(retina2x) {
            width: 200%;
            height: map-get($picker, item-height) * 2;
            @include transform(scale(0.5) translatey(-50%));
        }
        @include responsive(retina3x) {
            width: 300%;
            height: map-get($picker, item-height) * 3;
            @include transform(scale(0.33333) translatey(-50%));
        }
        @include transform-origin(0 0);
    }
}

/**
 * @module fragment
 * @method yo-picker
 * @version 3.0.0
 * @description 构造yo-picker的自定义使用方法
 * @demo http://ued.qunar.com/hy2/yo/demo/src/html/fragment/yo-picker.html
 * @param {String} $name 定义扩展名称 <3.0.0>
 * @param {Integer} $item 显示的子项个数 <3.0.0>
 * @param {Length} $item-height 子项高度 <3.0.0>
 * @param {Color} $border-color 边框色 <3.0.0>
 */

@mixin yo-picker(
    $name: default,
    $item: default,
    $item-height: default,
    $border-color: default) {
    // 区别是否新增实例还是修改本身
    $name: if($name == default, "", "-#{$name}");
    // 如果值为default，则取config的定义
    @if $item == default {
        $item: map-get($picker, item);
    }
    @if $item-height == default {
        $item-height: map-get($picker, item-height);
    }
    @if $border-color == default {
        $border-color: map-get($picker, border-color);
    }
    .yo-picker#{$name} {
        @if $item-height != map-get($picker, item-height) or $item != map-get($picker, item) {
            height: $item-height * $item;
        }
        > .list {
            > .item {
                @if $item-height != map-get($picker, item-height) {
                    height: $item-height;
                    line-height: $item-height;
                }
            }
        }
        &::before {
            @if $item-height != map-get($picker, item-height) {
                @include responsive(retina1x) {
                    height: $item-height;
                }
                @include responsive(retina2x) {
                    height: $item-height * 2;
                }
                @include responsive(retina3x) {
                    height: $item-height * 3;
                }
            }
            @if $border-color != map-get($picker, border-color) {
                border-color: $border-color;
            }
        }

        // 增量扩展
        @content;
    }
}

// 调用本文件时载入picker基础构造
.yo-picker {
    @include _picker;
}