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<template>
	<view class="fui-swiper__wrap">
		<slot></slot>
		<view v-if="type==1" class="fui-swiper__dot"
			:style="{left:dots.left+'rpx',right:dots.right+'rpx',bottom:dots.bottom+'rpx'}">
			<view @tap.stop="itemClick(index)" class="fui-swiper__dot-item"
				:class="{'fui-swiper__dot-bg':!dots.activeBackground && index==current}"
				:style="{width:index==current?activeWidth:width,height:height,borderRadius:radius,background:index==current?dots.activeBackground:dots.background,marginLeft:dots.margin+'rpx',marginRight:dots.margin+'rpx'}"
				v-for="(item,index) in items" :key="index"></view>
		</view>
		<view v-if="type==2" class="fui-swiper__dot"
			:style="{left:dots.left+'rpx',right:dots.right+'rpx',bottom:dots.bottom+'rpx'}">
			<text @tap.stop="itemClick(index)" class="fui-swiper__dot-item fui-swiper__flex-center"
				:class="{'fui-swiper__dot-bg':!dots.activeBackground && index==current}"
				:style="{width:width,height:height,borderRadius:radius,background:index==current?dots.activeBackground:dots.background,marginLeft:dots.margin+'rpx',marginRight:dots.margin+'rpx',color:index==current?dots.activeColor:dots.color,fontSize:dots.size+'rpx'}"
				v-for="(item,index) in items" :key="index">{{index+1}}</text>
		</view>
		<view v-if="type==3" class="fui-swiper__dot"
			:style="{left:dots.left+'rpx',right:dots.right+'rpx',bottom:dots.bottom+'rpx',height:(dots.height<64?64:dots.height)+'rpx',background:dots.background,paddingLeft:dots.padding+'rpx',paddingRight:dots.padding+'rpx'}">
			<text @tap.stop="itemClick(current)" class="fui-swiper__dot-item fui-swiper__nav-ellipsis"
				:style="{fontSize:dots.size+'rpx',color:dots.color}">{{items[current][field]}}</text>
		</view>
		<view v-if="type==4" class="fui-swiper__dot" :style="{right:dots.right+'rpx',bottom:dots.bottom+'rpx'}">
			<text @tap.stop="itemClick(current)" class="fui-swiper__dot-item fui-swiper__flex-center"
				:style="{width:width,height:height,borderTopLeftRadius:radius,borderBottomLeftRadius:radius,background:dots.background,color:dots.color,fontSize:dots.size+'rpx'}">{{current+1}}/{{items.length}}</text>
		</view>
	</view>
</template>

<script>
	export default {
		name: "fui-swiper-dot",
		emits: ['click'],
		props: {
			items: {
				type: Array,
				default () {
					return []
				}
			},
			type: {
				type: [Number, String],
				default: 1
			},
			current: {
				type: [Number, String],
				default: 0
			},
			styles: {
				type: Object,
				default () {
					return {}
				}
			},
			field: {
				type: String,
				default: ''
			}
		},
		data() {
			let primaryColor = '';
			// #ifdef APP-NVUE
			const app = uni && uni.$fui && uni.$fui.color;
			primaryColor = (app && app.primary) || '#465CFF';
			// #endif
			return {
				dots: {
					left: 0,
					right: 0,
					bottom: 32,
					width: 16,
					activeWidth: 16,
					height: 16,
					radius: true,
					background: 'rgba(0,0,0,.6)',
					// #ifdef APP-NVUE
					activeBackground: primaryColor,
					// #endif
					// #ifndef APP-NVUE
					activeBackground: '',
					// #endif
					color: '#fff',
					activeColor: '#fff',
					size: 28,
					margin: 8,
					padding: 32
				},
				width: 0,
				activeWidth: 0,
				height: 0,
				radius: 0
			};
		},
		watch: {
			styles(newVal) {
				this.dots = Object.assign(this.dots, this.styles)
				this.initStyles()
			}
		},
		created() {
			this.dots = Object.assign(this.dots, this.styles)
			this.initStyles()
		},
		methods: {
			getPx(val, radius) {
				let res = 0;
				if (val && radius) {
					res = Math.floor(uni.upx2px(val))
					res = res % 2 === 0 ? res : res + 1
				}
				return res + 'px'
			},
			initStyles() {
				//处理圆角变形
				this.width = this.getPx(this.dots.width, true)
				this.activeWidth = this.getPx(this.dots.activeWidth, true)
				this.height = this.getPx(this.dots.height, true)
				this.radius = this.getPx(this.dots.width, this.dots.radius)
			},
			itemClick(index) {
				this.$emit('click', {
					index: index
				})
			}
		}
	}
</script>

<style scoped>
	.fui-swiper__wrap {
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex: 1;
		flex-direction: column;
		position: relative;
		overflow: hidden;
	}

	.fui-swiper__dot {
		position: absolute;
		/* #ifndef APP-NVUE */
		display: flex;
		box-sizing: border-box;
		/* #endif */
		flex-direction: row;
		align-items: center;
		justify-content: center;
		z-index: 2;
		overflow: hidden;
	}

	.fui-swiper__dot-item {
		/* #ifndef APP-NVUE */
		flex-shrink: 0;
		display: flex;
		box-sizing: border-box;
		/* #endif */
		flex-direction: row;
		align-items: center;
	}

	.fui-swiper__nav-ellipsis {
		flex: 1;
		/* #ifdef APP-NVUE */
		lines: 1;
		/* #endif */
		/* #ifndef APP-NVUE */
		display: block;
		white-space: nowrap;
		/* #endif */
		overflow: hidden;
		text-overflow: ellipsis;
	}

	.fui-swiper__flex-center {
		justify-content: center;
		text-align: center;
	}

	/* #ifndef APP-NVUE */
	.fui-swiper__dot-bg {
		background: var(--fui-color-primary, #465CFF) !important;
	}

	/* #endif */
</style>