65 lines
1.4 KiB
JavaScript
65 lines
1.4 KiB
JavaScript
import { createNamespace } from '../utils';
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import { ChildrenMixin } from '../mixins/relation';
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const [createComponent, bem] = createNamespace('swipe-item');
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export default createComponent({
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mixins: [ChildrenMixin('vanSwipe')],
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data() {
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return {
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offset: 0,
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mounted: false,
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};
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},
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mounted() {
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this.$nextTick(() => {
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this.mounted = true;
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});
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},
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computed: {
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style() {
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const style = {};
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const { size, vertical } = this.parent;
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style[vertical ? 'height' : 'width'] = `${size}px`;
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if (this.offset) {
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style.transform = `translate${vertical ? 'Y' : 'X'}(${this.offset}px)`;
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}
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return style;
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},
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shouldRender() {
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const { index, parent, mounted } = this;
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if (!parent.lazyRender) {
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return true;
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}
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// wait for all item to mount, so we can get the exact count
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if (!mounted) {
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return false;
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}
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const active = parent.activeIndicator;
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const maxActive = parent.count - 1;
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const prevActive = active === 0 ? maxActive : active - 1;
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const nextActive = active === maxActive ? 0 : active + 1;
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return index === active || index === prevActive || index === nextActive;
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},
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},
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render() {
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return (
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<div class={bem()} style={this.style} {...{ on: this.$listeners }}>
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{this.shouldRender && this.slots()}
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</div>
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);
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},
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});
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