116 lines
2.5 KiB
Vue
116 lines
2.5 KiB
Vue
<template>
|
|
<div class="video-scroll" ref="root">
|
|
<img class="visible loaded"
|
|
:src="definition.files[0]"
|
|
:style="{
|
|
top: `${Math.round(definition.top)}px`,
|
|
left:`${Math.round(definition.left)}px`,
|
|
}"
|
|
/>
|
|
|
|
<img v-for="(file, idx) in definition.files.slice(1)"
|
|
:data-src="file"
|
|
:style="{
|
|
top: `${Math.round(definition.top)}px`,
|
|
left: `${Math.round(definition.left) + width * (idx + 1)}px`,
|
|
}"
|
|
/>
|
|
|
|
</div>
|
|
</template>
|
|
|
|
<script lang="ts">
|
|
import {defineComponent, onMounted, ref} from "vue";
|
|
|
|
export default defineComponent({
|
|
name: "VideoScroll",
|
|
props: {
|
|
definition: {
|
|
type: Object,
|
|
required: true
|
|
}
|
|
},
|
|
setup(props) {
|
|
const width = ref(0);
|
|
const height = ref(0);
|
|
const root = ref<Element | null>(null);
|
|
|
|
const definition = props.definition as VideoScrollDef;
|
|
getMeta(definition.files[0]).then((img) => {
|
|
width.value = img.width;
|
|
height.value = img.height;
|
|
});
|
|
|
|
onMounted(() => {
|
|
const observer = new IntersectionObserver((entries, observer) => {
|
|
entries.forEach((entry) => {
|
|
const element = entry.target as HTMLImageElement;
|
|
if (entry.isIntersecting) {
|
|
element.classList.add("visible");
|
|
if (!element.src) {
|
|
element.src = element.dataset.src!;
|
|
element.onload = () => {
|
|
element.classList.add("loaded");
|
|
};
|
|
}
|
|
} else {
|
|
element.classList.remove("visible");
|
|
}
|
|
});
|
|
}, {rootMargin: "100px"});
|
|
Array.from((root.value as Element).children).forEach((el) => {
|
|
observer.observe(el);
|
|
});
|
|
});
|
|
|
|
return {
|
|
root,
|
|
width,
|
|
height
|
|
};
|
|
|
|
}
|
|
});
|
|
|
|
export enum VideoScrollDirection {
|
|
RIGHT
|
|
}
|
|
|
|
export interface VideoScrollDef {
|
|
top: number,
|
|
left: number,
|
|
direction: VideoScrollDirection,
|
|
files: string[],
|
|
style?: { [key: string]: string }
|
|
}
|
|
|
|
function getMeta(url: string): Promise<HTMLImageElement> {
|
|
return new Promise((resolve, reject) => {
|
|
let img = new Image();
|
|
img.onload = () => resolve(img);
|
|
img.onerror = () => reject();
|
|
img.src = url;
|
|
});
|
|
}
|
|
|
|
|
|
</script>
|
|
|
|
<!-- Add "scoped" attribute to limit CSS to this component only -->
|
|
<style scoped>
|
|
.video-scroll img {
|
|
position: absolute;
|
|
image-rendering: optimizeSpeed;
|
|
opacity: 0;
|
|
transition: opacity .5s;
|
|
visibility: hidden;
|
|
}
|
|
|
|
.loaded {
|
|
opacity: 1 !important;
|
|
}
|
|
|
|
.visible {
|
|
visibility: visible !important;
|
|
}
|
|
</style>
|