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53 lines
1.9 KiB
53 lines
1.9 KiB
'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true
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});
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exports.pageScrollMixin = void 0;
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var validator_1 = require('../common/validator');
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var utils_1 = require('../common/utils');
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function onPageScroll(event) {
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var _a = (0, utils_1.getCurrentPage)().vanPageScroller;
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var vanPageScroller = _a === void 0 ? [] : _a;
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vanPageScroller.forEach(function (scroller) {
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if (typeof scroller === 'function') {
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// @ts-ignore
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scroller(event);
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}
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});
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}
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function pageScrollMixin(scroller) {
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return {
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beforeMount: function () {
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var page = (0, utils_1.getCurrentPage)();
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if (!(0, utils_1.isDef)(page)) {
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return;
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}
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var _scroller = scroller.bind(this);
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var _a = page.vanPageScroller;
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var vanPageScroller = _a === void 0 ? [] : _a;
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if ((0, validator_1.isFunction)(page.onPageScroll) && page.onPageScroll !== onPageScroll) {
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vanPageScroller.push(page.onPageScroll.bind(page));
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}
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vanPageScroller.push(_scroller);
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page.vanPageScroller = vanPageScroller;
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page.onPageScroll = onPageScroll;
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this._scroller = _scroller;
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},
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destroyed: function () {
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var that = this;
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var page = (0, utils_1.getCurrentPage)();
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if (!(0, utils_1.isDef)(page) || !(0, utils_1.isDef)(page.vanPageScroller)) {
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return;
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}
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var vanPageScroller = page.vanPageScroller;
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var index = vanPageScroller.findIndex(function (v) {
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return v === that._scroller;
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});
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if (index > -1) {
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page.vanPageScroller.splice(index, 1);
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}
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this._scroller = undefined;
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}
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};
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}
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exports.pageScrollMixin = pageScrollMixin;
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