242 lines
8.1 KiB
JavaScript
242 lines
8.1 KiB
JavaScript
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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 dom from '../behaviors/dom';
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import touch from '../behaviors/touch';
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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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const { prefix } = config;
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const name = `${prefix}-tabs`;
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var Position;
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(function (Position) {
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Position["top"] = "top";
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Position["right"] = "right";
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Position["bottom"] = "bottom";
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Position["left"] = "left";
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})(Position || (Position = {}));
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const trackLineWidth = 30;
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let Tabs = class Tabs extends SuperComponent {
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constructor() {
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super(...arguments);
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this.behaviors = [dom, touch];
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this.externalClasses = [`${prefix}-class`, `${prefix}-class-item`, `${prefix}-class-active`, `${prefix}-class-track`];
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this.relations = {
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'./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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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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},
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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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animation(v) {
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this.setData({ animate: v });
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},
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placement() {
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this.adjustPlacement();
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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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isScrollX: true,
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isScrollY: false,
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direction: 'X',
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animate: { duration: 0 },
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offset: 0,
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};
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this.methods = {
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adjustPlacement() {
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const { placement } = this.properties;
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let isScrollX = false;
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let isScrollY = false;
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if (placement === Position.top || placement === Position.bottom) {
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isScrollX = true;
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}
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else {
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isScrollY = true;
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}
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this.setData({
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isScrollX,
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isScrollY,
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direction: isScrollX ? 'X' : 'Y',
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});
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},
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};
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}
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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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this.adjustPlacement();
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this.gettingBoundingClientRect(`.${name}`, true).then((res) => {
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this.containerWidth = res[0].width;
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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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this.setData({
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tabs: children.map((child) => child.data),
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}, 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, currentIndex) {
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return currentIndex * targetWidth - (1 / 2) * containerWidth + targetWidth / 2;
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}
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setTrack() {
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if (!this.properties.showBottomLine)
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return;
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const { children } = this;
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if (!children)
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return;
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const { currentIndex, isScrollX, direction } = this.data;
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if (currentIndex <= -1)
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return;
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this.gettingBoundingClientRect(`.${prefix}-tabs__item`, true)
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.then((res) => {
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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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for (const item of res) {
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if (count < currentIndex) {
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distance += isScrollX ? item.width : item.height;
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count += 1;
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}
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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.offset, currentIndex);
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this.setData({
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offset,
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});
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}
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if (isScrollX) {
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distance += (rect.width - trackLineWidth) / 2;
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}
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let trackStyle = `-webkit-transform: translate${direction}(${distance}px);
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transform: translate${direction}(${distance}px);
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`;
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trackStyle += isScrollX ? `width: ${trackLineWidth}px;` : `height: ${rect.height}px;`;
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this.setData({
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trackStyle,
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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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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] && !tabs[newIndex].disabled) {
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return newIndex;
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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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Tabs = __decorate([
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wxComponent()
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], Tabs);
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export default Tabs;
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