120 lines
3.1 KiB
Vue
120 lines
3.1 KiB
Vue
<template>
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<div class="video-scroll" ref="root">
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<img class="visible 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(definition) ? `${Math.round(definition.width)}px` : 'auto',
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height: isHorizontal(definition) ? 'auto' : `${Math.round(definition.height)}px`,
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}"
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/>
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<!--suppress RequiredAttributes -->
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<img v-for="(file, idx) in definition.files.slice(1)"
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:data-src="file"
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:data-direction="definition.direction"
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:style="{
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top: `${Math.round(definition.top) +
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(isHorizontal(definition) ? 0 : (definition.height * (idx + 1) * directionSign))}px`,
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left: `${Math.round(definition.left) +
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(isHorizontal(definition) ? (definition.width * (idx + 1) * directionSign) : 0)}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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}"
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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, onMounted, ref} from "vue";
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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,
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required: true
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}
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},
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computed: {
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directionSign() {
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if (this.definition.direction == VideoScrollDirection.RIGHT ||
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this.definition.direction == VideoScrollDirection.DOWN) {
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return 1;
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} else {
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return -1;
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}
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}
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},
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methods: {
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isHorizontal(definition: VideoScrollDef): boolean {
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return definition.direction === "left" || definition.direction === "right";
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}
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},
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setup(props) {
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const root = ref<Element | null>(null);
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onMounted(() => {
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const observer = new IntersectionObserver((entries, observer) => {
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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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if (!element.src) {
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element.src = element.dataset.src!;
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if (element.dataset.direction == "left" || element.dataset.direction == "right") {
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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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element.onload = () => {
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element.classList.add("loaded");
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};
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}
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}
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});
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});
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Array.from((root.value as Element).children).forEach((el) => {
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observer.observe(el);
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});
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});
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return {
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root
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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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width: number,
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height: number,
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direction: 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 scoped>
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.video-scroll img {
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position: absolute;
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image-rendering: optimizeSpeed;
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opacity: 0;
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transition: opacity .5s;
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}
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.loaded {
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opacity: 1 !important;
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}
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</style>
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