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127 lines
3.8 KiB
127 lines
3.8 KiB
import { VantComponent } from '../common/component';
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import { getRect, requestAnimationFrame } from '../common/utils';
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VantComponent({
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props: {
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text: {
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type: String,
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value: '',
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observer: 'init',
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},
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mode: {
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type: String,
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value: '',
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},
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url: {
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type: String,
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value: '',
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},
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openType: {
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type: String,
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value: 'navigate',
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},
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delay: {
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type: Number,
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value: 1,
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},
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speed: {
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type: Number,
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value: 60,
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observer: 'init',
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},
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scrollable: null,
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leftIcon: {
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type: String,
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value: '',
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},
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color: String,
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backgroundColor: String,
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background: String,
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wrapable: Boolean,
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},
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data: {
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show: true,
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},
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created() {
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this.resetAnimation = wx.createAnimation({
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duration: 0,
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timingFunction: 'linear',
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});
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},
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destroyed() {
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this.timer && clearTimeout(this.timer);
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},
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mounted() {
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this.init();
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},
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methods: {
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init() {
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requestAnimationFrame(() => {
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Promise.all([
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getRect(this, '.van-notice-bar__content'),
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getRect(this, '.van-notice-bar__wrap'),
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]).then((rects) => {
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const [contentRect, wrapRect] = rects;
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const { scrollable } = this.data;
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if (contentRect == null ||
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wrapRect == null ||
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!contentRect.width ||
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!wrapRect.width ||
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scrollable === false) {
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return;
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}
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if (scrollable || wrapRect.width < contentRect.width) {
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this.initAnimation(wrapRect.width, contentRect.width);
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this.scroll(true);
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}
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});
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});
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},
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initAnimation(warpWidth, contentWidth) {
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const { speed, delay } = this.data;
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this.wrapWidth = warpWidth;
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this.contentWidth = contentWidth;
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// begin 0
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this.contentDuration = (contentWidth / speed) * 1000;
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// begin -wrapWidth
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this.duration = ((warpWidth + contentWidth) / speed) * 1000;
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this.animation = wx.createAnimation({
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duration: this.contentDuration,
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timingFunction: 'linear',
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delay,
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});
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},
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scroll(isInit = false) {
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this.timer && clearTimeout(this.timer);
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this.timer = null;
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this.setData({
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animationData: this.resetAnimation
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.translateX(isInit ? 0 : this.wrapWidth)
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.step()
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.export(),
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});
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const duration = isInit ? this.contentDuration : this.duration;
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requestAnimationFrame(() => {
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this.setData({
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animationData: this.animation
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.translateX(-this.contentWidth)
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.step({ duration })
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.export(),
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});
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});
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this.timer = setTimeout(() => {
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this.scroll();
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}, duration + this.data.delay);
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},
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onClickIcon(event) {
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if (this.data.mode === 'closeable') {
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this.timer && clearTimeout(this.timer);
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this.timer = null;
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this.setData({ show: false });
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this.$emit('close', event.detail);
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}
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},
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onClick(event) {
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this.$emit('click', event);
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},
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},
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});
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