51 lines
1.6 KiB
JavaScript
51 lines
1.6 KiB
JavaScript
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const getCurrentPage = function () {
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const pages = getCurrentPages();
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return pages[pages.length - 1];
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};
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const onPageScroll = function (event) {
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const page = getCurrentPage();
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if (!page)
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return;
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const { pageScroller } = page;
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pageScroller.forEach((scroller) => {
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if (typeof scroller === 'function') {
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scroller(event);
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}
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});
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};
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export const pageScrollMixin = (scroller) => {
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let bindScroller = scroller;
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return Behavior({
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attached() {
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const page = getCurrentPage();
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if (!page)
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return;
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bindScroller = scroller.bind(this);
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if (Array.isArray(page.pageScroller)) {
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page.pageScroller.push(bindScroller);
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}
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else {
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page.pageScroller =
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typeof page.onPageScroll === 'function' ? [page.onPageScroll.bind(page), bindScroller] : [bindScroller];
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}
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page.onPageScroll = onPageScroll;
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},
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detached() {
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var _a;
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const page = getCurrentPage();
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if (!page)
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return;
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page.pageScroller = ((_a = page.pageScroller) === null || _a === void 0 ? void 0 : _a.filter((item) => item !== scroller)) || [];
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},
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});
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};
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export const getRect = function (context, selector) {
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return new Promise((resolve) => {
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wx.createSelectorQuery()
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.in(context)
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.select(selector)
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.boundingClientRect()
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.exec((rect = []) => resolve(rect[0]));
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});
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};
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