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<template>
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<view class="u-line" :style="[lineStyle]">
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</view>
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</template>
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<script>
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/**
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* line 线条
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* @description 此组件一般用于显示一根线条，用于分隔内容块，有横向和竖向两种模式，且能设置0.5px线条，使用也很简单
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* @tutorial https://www.uviewui.com/components/line.html
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* @property {String} color 线条的颜色(默认#e4e7ed)
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* @property {String} length 长度，竖向时表现为高度，横向时表现为长度，可以为百分比，带rpx单位的值等
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* @property {String} direction 线条的方向，row-横向，col-竖向(默认row)
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* @property {String} border-style 线条的类型，solid-实线，dashed-方形虚线，dotted-圆点虚线(默认solid)
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* @property {Boolean} hair-line 是否显示细线条(默认true)
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* @property {String} margin 线条与上下左右元素的间距，字符串形式，如"30rpx"
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* @example <u-line color="red"></u-line>
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*/
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export default {
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name: 'u-line',
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props: {
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color: {
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type: String,
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default: '#e4e7ed'
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},
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// 长度，竖向时表现为高度，横向时表现为长度，可以为百分比，带rpx单位的值等
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length: {
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type: String,
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default: '100%'
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},
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// 线条方向，col-竖向，row-横向
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direction: {
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type: String,
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default: 'row'
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},
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// 是否显示细边框
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hairLine: {
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type: Boolean,
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default: true
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},
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// 线条与上下左右元素的间距，字符串形式，如"30rpx"、"20rpx 30rpx"
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margin: {
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type: String,
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default: '0'
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},
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// 线条的类型，solid-实线，dashed-方形虚线，dotted-圆点虚线
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borderStyle: {
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type: String,
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default: 'solid'
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}
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},
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computed: {
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lineStyle() {
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let style = {};
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style.margin = this.margin;
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// 如果是水平线条，边框高度为1px，再通过transform缩小一半，就是0.5px了
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if(this.direction == 'row') {
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// 此处采用兼容分开写，兼容nvue的写法
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style.borderBottomWidth = '1px';
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style.borderBottomStyle = this.borderStyle;
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style.width = this.$u.addUnit(this.length);
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if(this.hairLine) style.transform = 'scaleY(0.5)';
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} else {
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// 如果是竖向线条，边框宽度为1px，再通过transform缩小一半，就是0.5px了
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style.borderLeftWidth = '1px';
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style.borderLeftStyle = this.borderStyle;
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style.height = this.$u.addUnit(this.length);
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if(this.hairLine) style.transform = 'scaleX(0.5)';
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}
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style.borderColor = this.color;
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return style;
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}
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}
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}
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</script>
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<style scoped lang="scss">
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@import "../../libs/css/style.components.scss";
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.u-line {
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vertical-align: middle;
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}
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</style>
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