117 lines
4.9 KiB
JavaScript
117 lines
4.9 KiB
JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
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var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
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else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
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return c > 3 && r && Object.defineProperty(target, key, r), r;
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};
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import { SuperComponent, wxComponent } from '../common/src/index';
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import props from './props';
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import config from '../common/config';
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import pageScrollMixin from '../mixins/page-scroll';
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import { getRect } from '../common/utils';
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const { prefix } = config;
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const name = `${prefix}-sticky`;
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const ContainerClass = `.${name}`;
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let Sticky = class Sticky extends SuperComponent {
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constructor() {
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super(...arguments);
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this.externalClasses = [`${prefix}-class`, `${prefix}-class-content`];
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this.properties = props;
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this.behaviors = [pageScrollMixin()];
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this.observers = {
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'offsetTop, disabled, container'() {
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this.onScroll();
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},
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};
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this.data = {
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prefix,
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classPrefix: name,
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containerStyle: '',
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contentStyle: '',
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};
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this.methods = {
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onScroll(event) {
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const { scrollTop } = event || {};
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const { container, offsetTop, disabled } = this.properties;
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if (disabled) {
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this.setDataAfterDiff({
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isFixed: false,
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transform: 0,
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});
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return;
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}
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this.scrollTop = scrollTop || this.scrollTop;
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if (typeof container === 'function') {
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Promise.all([getRect(this, ContainerClass), this.getContainerRect()]).then(([root, container]) => {
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if (!root || !container)
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return;
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if (offsetTop + root.height > container.height + container.top) {
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this.setDataAfterDiff({
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isFixed: false,
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transform: container.height - root.height,
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});
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}
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else if (offsetTop >= root.top) {
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this.setDataAfterDiff({
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isFixed: true,
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height: root.height,
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transform: 0,
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});
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}
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else {
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this.setDataAfterDiff({ isFixed: false, transform: 0 });
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}
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});
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return;
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}
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getRect(this, ContainerClass).then((root) => {
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if (!root)
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return;
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if (offsetTop >= root.top) {
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this.setDataAfterDiff({ isFixed: true, height: root.height });
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this.transform = 0;
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}
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else {
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this.setDataAfterDiff({ isFixed: false });
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}
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});
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},
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setDataAfterDiff(data) {
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const { offsetTop } = this.properties;
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const { containerStyle: prevContainerStyle, contentStyle: prevContentStyle } = this.data;
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const { isFixed, height, transform } = data;
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wx.nextTick(() => {
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let containerStyle = '';
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let contentStyle = '';
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if (isFixed) {
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containerStyle += `height:${height}px;`;
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contentStyle += `position:fixed;top:${offsetTop}px;left:0;right:0;`;
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}
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if (transform) {
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const translate = `translate3d(0, ${transform}px, 0)`;
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contentStyle += `-webkit-transform:${translate};transform:${translate};`;
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}
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if (prevContainerStyle !== containerStyle || prevContentStyle !== contentStyle) {
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this.setData({ containerStyle, contentStyle });
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}
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this.triggerEvent('scroll', {
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scrollTop: this.scrollTop,
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isFixed,
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});
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});
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},
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getContainerRect() {
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const nodesRef = this.properties.container();
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return new Promise((resolve) => nodesRef.boundingClientRect(resolve).exec());
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},
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};
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}
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ready() {
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this.onScroll();
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}
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};
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Sticky = __decorate([
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wxComponent()
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], Sticky);
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export default Sticky;
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