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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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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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 touch from '../mixins/touch';
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import { getRect, uniqueFactory } from '../common/utils';
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const { prefix } = config;
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const name = `${prefix}-tabs`;
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const getUniqueID = uniqueFactory('tabs');
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let Tabs = class Tabs extends SuperComponent {
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constructor() {
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super(...arguments);
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this.behaviors = [touch];
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this.externalClasses = [
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`${prefix}-class`,
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`${prefix}-class-item`,
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`${prefix}-class-active`,
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`${prefix}-class-track`,
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`${prefix}-class-content`,
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];
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this.relations = {
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'../tab-panel/tab-panel': {
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type: 'descendant',
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linked(target) {
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this.children.push(target);
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this.initChildId();
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target.index = this.children.length - 1;
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this.updateTabs();
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},
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unlinked(target) {
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this.children = this.children.filter((item) => item.index !== target.index);
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this.updateTabs(() => this.setTrack());
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this.initChildId();
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},
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},
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};
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this.properties = props;
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this.controlledProps = [
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{
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key: 'value',
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event: 'change',
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},
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];
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this.observers = {
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value(name) {
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if (name !== this.getCurrentName()) {
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this.setCurrentIndexByName(name);
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}
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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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tabs: [],
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currentIndex: -1,
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trackStyle: '',
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offset: 0,
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scrollLeft: 0,
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tabID: '',
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placement: 'top',
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};
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this.lifetimes = {
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created() {
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this.children = this.children || [];
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},
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attached() {
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wx.nextTick(() => {
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this.setTrack();
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});
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getRect(this, `.${name}`).then((rect) => {
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this.containerWidth = rect.width;
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});
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this.setData({
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tabID: getUniqueID(),
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});
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},
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};
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this.methods = {
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onScroll(e) {
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const { scrollLeft } = e.detail;
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this.setData({
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scrollLeft,
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});
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},
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updateTabs(cb) {
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const { children } = this;
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const tabs = children.map((child) => child.data);
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tabs.forEach((item) => {
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if (typeof item.icon === 'string') {
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item.icon = { name: item.icon };
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}
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});
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this.setData({ tabs }, cb);
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this.setCurrentIndexByName(this.properties.value);
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},
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setCurrentIndexByName(name) {
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const { children } = this;
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const index = children.findIndex((child) => child.getComputedName() === `${name}`);
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if (index > -1) {
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this.setCurrentIndex(index);
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}
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},
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setCurrentIndex(index) {
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if (index <= -1 || index >= this.children.length)
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return;
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this.children.forEach((child, idx) => {
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const isActive = index === idx;
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if (isActive !== child.data.active) {
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child.render(isActive, this);
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}
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});
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if (this.data.currentIndex === index)
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return;
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this.setData({
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currentIndex: index,
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});
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this.setTrack();
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},
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getCurrentName() {
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if (this.children) {
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const activeTab = this.children[this.data.currentIndex];
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if (activeTab) {
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return activeTab.getComputedName();
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}
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}
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},
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calcScrollOffset(containerWidth, targetLeft, targetWidth, offset) {
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return offset + targetLeft - (1 / 2) * containerWidth + targetWidth / 2;
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},
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getTrackSize() {
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return new Promise((resolve, reject) => {
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if (this.trackWidth) {
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resolve(this.trackWidth);
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return;
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}
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getRect(this, `.${prefix}-tabs__track`)
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.then((res) => {
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if (res) {
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this.trackWidth = res.width;
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resolve(this.trackWidth);
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}
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})
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.catch(reject);
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});
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},
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setTrack() {
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return __awaiter(this, void 0, void 0, function* () {
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const { children } = this;
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if (!children)
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return;
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const { currentIndex } = this.data;
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if (currentIndex <= -1)
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return;
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try {
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const res = yield getRect(this, `.${prefix}-tabs__item`, true);
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const rect = res[currentIndex];
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if (!rect)
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return;
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let count = 0;
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let distance = 0;
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let totalSize = 0;
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res.forEach((item) => {
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if (count < currentIndex) {
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distance += item.width;
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count += 1;
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}
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totalSize += item.width;
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});
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if (this.containerWidth) {
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const offset = this.calcScrollOffset(this.containerWidth, rect.left, rect.width, this.data.scrollLeft);
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const maxOffset = totalSize - this.containerWidth;
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this.setData({
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offset: Math.min(Math.max(offset, 0), maxOffset),
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});
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}
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if (this.data.theme === 'line') {
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const trackLineWidth = yield this.getTrackSize();
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distance += (rect.width - trackLineWidth) / 2;
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}
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this.setData({
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trackStyle: `-webkit-transform: translateX(${distance}px);
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transform: translateX(${distance}px);
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`,
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});
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}
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catch (err) {
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this.triggerEvent('error', err);
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}
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});
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},
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onTabTap(event) {
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const { index } = event.currentTarget.dataset;
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this.changeIndex(index);
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},
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onTouchStart(event) {
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if (!this.properties.swipeable)
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return;
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this.touchStart(event);
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},
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onTouchMove(event) {
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if (!this.properties.swipeable)
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return;
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this.touchMove(event);
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},
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onTouchEnd() {
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if (!this.properties.swipeable)
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return;
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const { direction, deltaX, offsetX } = this;
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const minSwipeDistance = 50;
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if (direction === 'horizontal' && offsetX >= minSwipeDistance) {
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const index = this.getAvailableTabIndex(deltaX);
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if (index !== -1) {
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this.changeIndex(index);
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}
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}
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},
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onTouchScroll(event) {
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this._trigger('scroll', event.detail);
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},
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changeIndex(index) {
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const currentTab = this.data.tabs[index];
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const { value, label } = currentTab;
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if (!(currentTab === null || currentTab === void 0 ? void 0 : currentTab.disabled) && index !== this.data.currentIndex) {
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this._trigger('change', { value, label });
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}
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this._trigger('click', { value, label });
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},
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getAvailableTabIndex(deltaX) {
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const step = deltaX > 0 ? -1 : 1;
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const { currentIndex, tabs } = this.data;
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const len = tabs.length;
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for (let i = step; currentIndex + step >= 0 && currentIndex + step < len; i += step) {
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const newIndex = currentIndex + i;
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if (newIndex >= 0 && newIndex < len && tabs[newIndex]) {
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if (!tabs[newIndex].disabled) {
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return newIndex;
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}
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}
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else {
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return currentIndex;
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}
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}
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return -1;
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},
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};
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}
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initChildId() {
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this.children.forEach((item, index) => {
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item.setId(`${this.data.tabID}_panel_${index}`);
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});
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}
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};
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Tabs = __decorate([
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wxComponent()
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], Tabs);
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export default Tabs;
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