youxi-app/uni_modules/cool-ui/components/cl-loading/cl-loading.uvue

<template>
	<view
		ref="loadingRef"
		class="cl-loading"
		:class="[
			{
				'cl-loading--dark': isDark && color == '',
				'!border-r-transparent': true
			},
			pt.className
		]"
		:style="loadingStyle"
		v-if="loading"
	>
	</view>
</template>

<script setup lang="ts">
import { computed, onMounted, shallowRef, watch } from "vue";
import { createAnimation, ctx, isAppAndroid, isDark, parsePt } from "@/.cool";
import type { ClIconProps } from "../cl-icon/props";
import { useSize } from "../../hooks";

defineOptions({
	name: "cl-loading"
});

// 定义组件属性
const props = defineProps({
	// 透传样式
	pt: {
		type: Object,
		default: () => ({})
	},
	// 是否加载中
	loading: {
		type: Boolean,
		default: true
	},
	// 图标大小
	size: {
		type: Number,
		default: 14
	},
	// 图标颜色
	color: {
		type: String,
		default: ""
	}
});

const { toScale } = useSize();

// 透传样式类型定义
type PassThrough = {
	className?: string;
	icon?: ClIconProps;
};

// 解析透传样式
const pt = computed(() => parsePt<PassThrough>(props.pt));

// 组件引用
const loadingRef = shallowRef<UniElement | null>(null);

// 颜色值
const color = computed<string>(() => {
	if (props.color == "") {
		return isDark.value ? "#ffffff" : (ctx.color["surface-700"] as string);
	}

	switch (props.color) {
		case "primary":
			return ctx.color["primary-500"] as string;
		case "success":
			return "#22c55e";
		case "warn":
			return "#eab308";
		case "error":
			return "#ef4444";
		case "info":
			return "#71717a";
		case "dark":
			return "#3f3f46";
		case "light":
			return "#ffffff";
		case "disabled":
			return "#d4d4d8";
		default:
			return props.color;
	}
});

// 大小
const size = computed(() => toScale(props.size) + "px");

// 加载样式
const loadingStyle = computed(() => {
	const style = {
		height: size.value,
		width: size.value,
		borderWidth: "1px",
		borderTopColor: color.value,
		borderRightColor: "transparent",
		borderBottomColor: color.value,
		borderLeftColor: color.value
	};

	// 手动校准偏移量
	if (isAppAndroid()) {
		if (props.size <= 16) {
			style["position"] = "relative";
			style["top"] = "-0.5px";
		}
	}

	return style;
});

// 开始旋转动画
async function start() {
	createAnimation(loadingRef.value, {
		duration: 2500,
		loop: -1,
		timingFunction: "linear"
	})
		.rotate("0deg", "360deg")
		.play();
}

// 组件挂载后监听loading状态
onMounted(() => {
	watch(
		computed(() => props.loading),
		(val: boolean) => {
			// 当loading为true时开始旋转
			if (val) {
				start();
			}
		},
		{
			immediate: true
		}
	);
});
</script>

<style lang="scss" scoped>
.cl-loading {
	@apply flex flex-row items-center justify-center rounded-full;
	@apply border-surface-700 border-solid;

	&--dark {
		border-color: white !important;
		border-right-color: transparent !important;
	}
}
</style>