<template>
    <view v-if="show" class="u-loading" :class="mode == 'circle' ? 'u-loading-circle' : 'u-loading-flower'" :style="[cricleStyle]">
    </view>
</template>

<script>
    /**
     * loading 加载动画
     * @description 警此组件为一个小动画，目前用在uView的loadmore加载更多和switch开关等组件的正在加载状态场景。
     * @tutorial https://www.uviewui.com/components/loading.html
     * @property {String} mode 模式选择，见官网说明（默认circle）
     * @property {String} color 动画活动区域的颜色，只对 mode = flower 模式有效（默认#c7c7c7）
     * @property {String Number} size 加载图标的大小，单位rpx（默认34）
     * @property {Boolean} show 是否显示动画（默认true）
     * @example <u-loading mode="circle"></u-loading>
     */
    export default {
        name: "u-loading",
        props: {
            // 动画的类型
            mode: {
                type: String,
                default: 'circle'
            },
            // 动画的颜色
            color: {
                type: String,
                default: '#c7c7c7'
            },
            // 加载图标的大小，单位rpx
            size: {
                type: [String, Number],
                default: '34'
            },
            // 是否显示动画
            show: {
                type: Boolean,
                default: true
            }
        },
        computed: {
            // 加载中圆圈动画的样式
            cricleStyle() {
                let style = {};
                style.width = this.size + 'rpx';
                style.height = this.size + 'rpx';
                if (this.mode == 'circle') style.borderColor = `#e4e4e4 #e4e4e4 #e4e4e4 ${this.color ? this.color : '#c7c7c7'}`;
                return style;
            },
        }
    }
</script>

<style lang="scss" scoped>
    @import "../../libs/css/style.components.scss";
    
    .u-loading-circle {
        /* #ifndef APP-NVUE */
        display: inline-flex;
        /* #endif */
        vertical-align: middle;
        width: 28rpx;
        height: 28rpx;
        background: 0 0;
        border-radius: 50%;
        border: 2px solid;
        border-color: #e5e5e5 #e5e5e5 #e5e5e5 #8f8d8e;
        animation: u-circle 1s linear infinite;
    }

    .u-loading-flower {
        width: 20px;
        height: 20px;
        display: inline-block;
        vertical-align: middle;
        -webkit-animation: a 1s steps(12) infinite;
        animation: u-flower 1s steps(12) infinite;
        background: transparent url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMjAiIGhlaWdodD0iMTIwIiB2aWV3Qm94PSIwIDAgMTAwIDEwMCI+PHBhdGggZmlsbD0ibm9uZSIgZD0iTTAgMGgxMDB2MTAwSDB6Ii8+PHJlY3Qgd2lkdGg9IjciIGhlaWdodD0iMjAiIHg9IjQ2LjUiIHk9IjQwIiBmaWxsPSIjRTlFOUU5IiByeD0iNSIgcnk9IjUiIHRyYW5zZm9ybT0idHJhbnNsYXRlKDAgLTMwKSIvPjxyZWN0IHdpZHRoPSI3IiBoZWlnaHQ9IjIwIiB4PSI0Ni41IiB5PSI0MCIgZmlsbD0iIzk4OTY5NyIgcng9IjUiIHJ5PSI1IiB0cmFuc2Zvcm09InJvdGF0ZSgzMCAxMDUuOTggNjUpIi8+PHJlY3Qgd2lkdGg9IjciIGhlaWdodD0iMjAiIHg9IjQ2LjUiIHk9IjQwIiBmaWxsPSIjOUI5OTlBIiByeD0iNSIgcnk9IjUiIHRyYW5zZm9ybT0icm90YXRlKDYwIDc1Ljk4IDY1KSIvPjxyZWN0IHdpZHRoPSI3IiBoZWlnaHQ9IjIwIiB4PSI0Ni41IiB5PSI0MCIgZmlsbD0iI0EzQTFBMiIgcng9IjUiIHJ5PSI1IiB0cmFuc2Zvcm09InJvdGF0ZSg5MCA2NSA2NSkiLz48cmVjdCB3aWR0aD0iNyIgaGVpZ2h0PSIyMCIgeD0iNDYuNSIgeT0iNDAiIGZpbGw9IiNBQkE5QUEiIHJ4PSI1IiByeT0iNSIgdHJhbnNmb3JtPSJyb3RhdGUoMTIwIDU4LjY2IDY1KSIvPjxyZWN0IHdpZHRoPSI3IiBoZWlnaHQ9IjIwIiB4PSI0Ni41IiB5PSI0MCIgZmlsbD0iI0IyQjJCMiIgcng9IjUiIHJ5PSI1IiB0cmFuc2Zvcm09InJvdGF0ZSgxNTAgNTQuMDIgNjUpIi8+PHJlY3Qgd2lkdGg9IjciIGhlaWdodD0iMjAiIHg9IjQ2LjUiIHk9IjQwIiBmaWxsPSIjQkFCOEI5IiByeD0iNSIgcnk9IjUiIHRyYW5zZm9ybT0icm90YXRlKDE4MCA1MCA2NSkiLz48cmVjdCB3aWR0aD0iNyIgaGVpZ2h0PSIyMCIgeD0iNDYuNSIgeT0iNDAiIGZpbGw9IiNDMkMwQzEiIHJ4PSI1IiByeT0iNSIgdHJhbnNmb3JtPSJyb3RhdGUoLTE1MCA0NS45OCA2NSkiLz48cmVjdCB3aWR0aD0iNyIgaGVpZ2h0PSIyMCIgeD0iNDYuNSIgeT0iNDAiIGZpbGw9IiNDQkNCQ0IiIHJ4PSI1IiByeT0iNSIgdHJhbnNmb3JtPSJyb3RhdGUoLTEyMCA0MS4zNCA2NSkiLz48cmVjdCB3aWR0aD0iNyIgaGVpZ2h0PSIyMCIgeD0iNDYuNSIgeT0iNDAiIGZpbGw9IiNEMkQyRDIiIHJ4PSI1IiByeT0iNSIgdHJhbnNmb3JtPSJyb3RhdGUoLTkwIDM1IDY1KSIvPjxyZWN0IHdpZHRoPSI3IiBoZWlnaHQ9IjIwIiB4PSI0Ni41IiB5PSI0MCIgZmlsbD0iI0RBREFEQSIgcng9IjUiIHJ5PSI1IiB0cmFuc2Zvcm09InJvdGF0ZSgtNjAgMjQuMDIgNjUpIi8+PHJlY3Qgd2lkdGg9IjciIGhlaWdodD0iMjAiIHg9IjQ2LjUiIHk9IjQwIiBmaWxsPSIjRTJFMkUyIiByeD0iNSIgcnk9IjUiIHRyYW5zZm9ybT0icm90YXRlKC0zMCAtNS45OCA2NSkiLz48L3N2Zz4=) no-repeat;
        background-size: 100%;
    }

    @keyframes u-flower {
        0% {
            -webkit-transform: rotate(0deg);
            transform: rotate(0deg);
        }

        to {
            -webkit-transform: rotate(1turn);
            transform: rotate(1turn);
        }
    }

    @-webkit-keyframes u-circle {
        0% {
            transform: rotate(0);
        }

        100% {
            transform: rotate(360deg);
        }
    }
</style>