143 lines
4.1 KiB
Vue
143 lines
4.1 KiB
Vue
<template>
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<div class="video-scroll" ref="root">
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<img class="visible displayed loaded"
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:src="definition.files[0]"
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:style="{
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top: `${Math.round(definition.top)}px`,
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left: `${Math.round(definition.left)}px`,
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width: isHorizontal ? `${Math.round(definition.width)}px` : 'auto',
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height: isVertical ? `${Math.round(definition.height)}px` : 'auto',
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rotate: `${definition.angle}deg`
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}"
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/>
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<!--suppress RequiredAttributes -->
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<img v-for="file in dynamicFiles"
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:data-src="file.src"
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:style="{
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top: `${Math.round(file.top)}px`,
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left: `${Math.round(file.left)}px`,
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width: `${Math.round(definition.width)}px`,
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height: `${Math.round(definition.height)}px`,
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rotate: `${definition.angle}deg`
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}"
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/>
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</div>
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</template>
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<script lang="ts">
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import {defineComponent, PropType} from "vue";
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import {rotate} from "@/utils";
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export default defineComponent({
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name: "VideoScroll",
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props: {
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definition: {
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type: Object as PropType<VideoScrollDef>,
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required: true
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}
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},
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computed: {
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dynamicFiles(): { top: number, left: number, src: string }[] {
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return this.definition.files.slice(1).map((src: string, idx: number) => {
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const cy = this.definition.top +
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(this.isVertical ? (this.definition.height * (idx + 1) * this.verticalDirection) : 0);
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const cx = this.definition.left +
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(this.isHorizontal ? (this.definition.width * (idx + 1) * this.horizontalDirection) : 0);
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const [left, top] = rotate(cx, cy, this.definition.left, this.definition.top, this.definition.angle);
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return {top, left, src};
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});
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},
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isHorizontal(): boolean {
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return this.definition.directions.some(
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(dir: VideoScrollDirection) => dir === VideoScrollDirection.LEFT || dir === VideoScrollDirection.RIGHT
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);
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},
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isVertical(): boolean {
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return this.definition.directions.some(
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(dir: VideoScrollDirection) => dir === VideoScrollDirection.UP || dir === VideoScrollDirection.DOWN
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);
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},
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horizontalDirection(): number {
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return this.definition.directions.includes(VideoScrollDirection.RIGHT) ? 1 : -1;
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},
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verticalDirection(): number {
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return this.definition.directions.includes(VideoScrollDirection.DOWN) ? 1 : -1;
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}
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},
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mounted() {
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const observer = new IntersectionObserver((entries, _) => {
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entries.forEach((entry) => {
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const element = entry.target as HTMLImageElement;
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if (entry.isIntersecting) {
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element.classList.add("visible");
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if (!element.src) {
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console.debug(`[VIDEOSCROLL] Intersected, loading ${element.dataset.src}`);
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element.src = element.dataset.src!;
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setTimeout(() => {
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element.classList.add("displayed");
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}, 3000);
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element.onload = () => {
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element.classList.add("displayed");
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element.classList.add("loaded");
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if (this.isHorizontal) {
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element.style.height = "auto";
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} else {
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element.style.width = "auto";
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}
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};
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}
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} else {
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element.classList.remove("visible");
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}
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});
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});
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Array.from((this.$refs.root as Element).children).forEach((el) => {
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observer.observe(el);
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});
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}
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});
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export enum VideoScrollDirection {
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RIGHT = "right",
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LEFT = "left",
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UP = "up",
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DOWN = "down"
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}
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export interface VideoScrollDef {
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top: number,
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left: number,
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angle: number,
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width: number,
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height: number,
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directions: VideoScrollDirection[],
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files: string[]
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}
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</script>
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<!-- Add "scoped" attribute to limit CSS to this component only -->
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<style>
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.video-scroll img {
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position: absolute;
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image-rendering: optimizeSpeed;
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background: grey;
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visibility: hidden;
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opacity: 0;
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transition: opacity .5s;
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}
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.video-scroll img.visible {
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visibility: visible !important;
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}
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.video-scroll img.displayed {
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opacity: 1 !important;
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}
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.video-scroll img.loaded {
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background: transparent !important;
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}
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</style>
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