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 config from '../common/config';
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import props from './props';
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import { getRect, throttle } from '../common/utils';
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import pageScrollMixin from '../mixins/page-scroll';
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const { prefix } = config;
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const name = `${prefix}-indexes`;
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let Indexes = class Indexes extends SuperComponent {
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constructor() {
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super(...arguments);
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this.externalClasses = [`${prefix}-class`, `${prefix}-class-sidebar`, `${prefix}-class-sidebar-item`];
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this.properties = props;
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this.data = {
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prefix,
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classPrefix: name,
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_height: 0,
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_indexList: [],
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scrollTop: 0,
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activeAnchor: null,
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showTips: false,
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};
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this.relations = {
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'../indexes-anchor/indexes-anchor': {
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type: 'child',
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},
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};
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this.behaviors = [pageScrollMixin()];
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this.timer = null;
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this.groupTop = [];
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this.sidebar = null;
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this.observers = {
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indexList(v) {
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this.setIndexList(v);
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this.setHeight(this.data._height);
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},
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height(v) {
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this.setHeight(v);
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},
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};
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this.lifetimes = {
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ready() {
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if (this.data._height === 0) {
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this.setHeight();
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}
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if (this.data.indexList === null) {
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this.setIndexList();
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}
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},
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};
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this.methods = {
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setHeight(height) {
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if (!height) {
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const { windowHeight } = wx.getSystemInfoSync();
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height = windowHeight;
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}
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this.setData({
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_height: height,
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}, () => {
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this.getAllRect();
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});
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},
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setIndexList(list) {
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if (!list) {
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const start = 'A'.charCodeAt(0);
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const alphabet = [];
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for (let i = start, end = start + 26; i < end; i += 1) {
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alphabet.push(String.fromCharCode(i));
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}
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this.setData({ _indexList: alphabet });
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}
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else {
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this.setData({ _indexList: list });
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}
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},
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getAllRect() {
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this.getAnchorsRect().then(() => {
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this.groupTop.forEach((item, index) => {
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const next = this.groupTop[index + 1];
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item.totalHeight = ((next === null || next === void 0 ? void 0 : next.top) || Infinity) - item.top;
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});
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this.setAnchorOnScroll(0);
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});
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this.getSidebarRect();
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},
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getAnchorsRect() {
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return Promise.all(this.$children.map((child) => getRect(child, `.${name}-anchor`).then((rect) => {
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this.groupTop.push({
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height: rect.height,
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top: rect.top,
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anchor: child.data.index,
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});
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})));
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},
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getSidebarRect() {
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getRect(this, `#id-${name}__bar`).then((rect) => {
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const { top, height } = rect;
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const { length } = this.data._indexList;
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this.sidebar = {
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top,
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height,
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itemHeight: (height - (length - 1) * 2) / length,
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};
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});
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},
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toggleTips(flag) {
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if (!flag) {
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clearInterval(this.timer);
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this.timer = setTimeout(() => {
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this.setData({
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showTips: false,
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});
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}, 300);
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}
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else {
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this.setData({
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showTips: true,
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});
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}
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},
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setAnchorByIndex(index) {
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if (this.preIndex != null && this.preIndex === index)
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return;
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const { _indexList } = this.data;
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const activeAnchor = _indexList[index];
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const target = this.groupTop.find((item) => item.anchor === activeAnchor);
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if (target) {
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wx.pageScrollTo({
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scrollTop: target.top,
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duration: 0,
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});
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}
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this.preIndex = index;
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this.toggleTips(true);
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this.triggerEvent('select', { index: activeAnchor });
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if (activeAnchor !== this.data.activeAnchor) {
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this.triggerEvent('change', { index: activeAnchor });
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}
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},
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onClick(e) {
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const { index } = e.currentTarget.dataset;
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this.setAnchorByIndex(index);
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},
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onTouchMove(e) {
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this.onAnchorTouch(e);
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},
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onTouchCancel() {
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this.toggleTips(false);
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},
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onTouchEnd(e) {
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this.toggleTips(false);
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this.onAnchorTouch(e);
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},
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onAnchorTouch: throttle(function (e) {
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const getAnchorIndex = (clientY) => {
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const offsetY = clientY - this.sidebar.top;
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if (offsetY <= 0) {
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return 0;
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}
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if (offsetY > this.sidebar.height) {
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return this.data._indexList.length - 1;
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}
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return Math.floor(offsetY / this.sidebar.itemHeight);
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};
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const index = getAnchorIndex(e.changedTouches[0].clientY);
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this.setAnchorByIndex(index);
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}, 1000 / 30),
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setAnchorOnScroll(scrollTop) {
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if (!this.groupTop) {
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return;
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}
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const { sticky, stickyOffset } = this.data;
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scrollTop += stickyOffset;
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const curIndex = this.groupTop.findIndex((group) => scrollTop >= group.top - group.height && scrollTop <= group.top + group.totalHeight - group.height);
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if (curIndex === -1)
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return;
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const curGroup = this.groupTop[curIndex];
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if (this.data.activeAnchor !== curGroup.anchor) {
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this.triggerEvent('change', { index: curGroup.anchor });
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}
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this.setData({
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activeAnchor: curGroup.anchor,
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});
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if (sticky) {
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const offset = curGroup.top - scrollTop;
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const betwixt = offset < curGroup.height && offset > 0 && scrollTop > stickyOffset;
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this.$children.forEach((child, index) => {
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if (index === curIndex) {
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child.setData({
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sticky: scrollTop > stickyOffset,
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active: true,
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style: `height: ${curGroup.height}px`,
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anchorStyle: `transform: translate3d(0, ${betwixt ? offset : 0}px, 0); top: ${stickyOffset}px`,
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});
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}
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else if (index + 1 === curIndex) {
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child.setData({
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sticky: true,
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active: true,
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style: `height: ${curGroup.height}px`,
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anchorStyle: `transform: translate3d(0, ${betwixt ? offset - curGroup.height : 0}px, 0); top: ${stickyOffset}px`,
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});
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}
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else {
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child.setData({ active: false, sticky: false, anchorStyle: '' });
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}
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});
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}
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},
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onScroll({ scrollTop }) {
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this.setAnchorOnScroll(scrollTop);
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},
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};
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}
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};
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Indexes = __decorate([
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wxComponent()
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], Indexes);
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export default Indexes;
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