mirror of
https://github.com/misskey-dev/misskey
synced 2024-06-26 04:17:54 +02:00
143 lines
3.3 KiB
Vue
143 lines
3.3 KiB
Vue
<template>
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<div :class="[$style.root, { [$style.cover]: cover }]" :title="title ?? ''">
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<img v-if="!loaded && src && !forceBlurhash" :class="$style.loader" :src="src" @load="onLoad"/>
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<Transition
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mode="in-out"
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:enter-active-class="defaultStore.state.animation && (props.transition?.enterActiveClass ?? $style['transition_toggle_enterActive']) || undefined"
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:leave-active-class="defaultStore.state.animation && (props.transition?.leaveActiveClass ?? $style['transition_toggle_leaveActive']) || undefined"
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:enter-from-class="defaultStore.state.animation && props.transition?.enterFromClass || undefined"
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:leave-to-class="defaultStore.state.animation && props.transition?.leaveToClass || undefined"
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:enter-to-class="defaultStore.state.animation && (props.transition?.enterToClass ?? $style['transition_toggle_enterTo']) || undefined"
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:leave-from-class="defaultStore.state.animation && (props.transition?.leaveFromClass ?? $style['transition_toggle_leaveFrom']) || undefined"
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>
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<canvas v-if="!loaded || forceBlurhash" ref="canvas" :class="$style.canvas" :width="width" :height="height" :title="title ?? undefined"/>
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<img v-else :class="$style.img" :src="src ?? undefined" :title="title ?? undefined" :alt="alt ?? undefined"/>
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</Transition>
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</div>
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</template>
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<script lang="ts" setup>
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import { onMounted, shallowRef, useCssModule, watch } from 'vue';
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import { decode } from 'blurhash';
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import { defaultStore } from '@/store';
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const $style = useCssModule();
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const props = withDefaults(defineProps<{
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transition?: {
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enterActiveClass?: string;
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leaveActiveClass?: string;
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enterFromClass?: string;
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leaveToClass?: string;
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enterToClass?: string;
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leaveFromClass?: string;
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} | null;
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src?: string | null;
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hash?: string;
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alt?: string | null;
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title?: string | null;
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height?: number;
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width?: number;
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cover?: boolean;
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forceBlurhash?: boolean;
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}>(), {
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transition: null,
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src: null,
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alt: '',
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title: null,
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height: 64,
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width: 64,
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cover: true,
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forceBlurhash: false,
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});
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const canvas = shallowRef<HTMLCanvasElement>();
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let loaded = $ref(false);
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let width = $ref(props.width);
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let height = $ref(props.height);
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function onLoad() {
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loaded = true;
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}
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watch([() => props.width, () => props.height], () => {
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const ratio = props.width / props.height;
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if (ratio > 1) {
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width = Math.round(64 * ratio);
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height = 64;
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} else {
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width = 64;
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height = Math.round(64 / ratio);
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}
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}, {
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immediate: true,
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});
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function draw() {
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if (props.hash == null || !canvas.value) return;
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const pixels = decode(props.hash, width, height);
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const ctx = canvas.value.getContext('2d');
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const imageData = ctx!.createImageData(width, height);
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imageData.data.set(pixels);
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ctx!.putImageData(imageData, 0, 0);
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}
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watch([() => props.hash, canvas], () => {
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draw();
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});
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onMounted(() => {
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draw();
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});
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</script>
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<style lang="scss" module>
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.transition_toggle_enterActive,
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.transition_toggle_leaveActive {
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position: absolute;
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top: 0;
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left: 0;
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}
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.transition_toggle_enterTo,
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.transition_toggle_leaveFrom {
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opacity: 0;
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}
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.loader {
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position: absolute;
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top: 0;
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left: 0;
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width: 0;
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height: 0;
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}
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.root {
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position: relative;
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width: 100%;
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height: 100%;
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&.cover {
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> .canvas,
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> .img {
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object-fit: cover;
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}
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}
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}
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.canvas,
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.img {
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display: block;
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width: 100%;
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height: 100%;
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}
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.canvas {
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object-fit: contain;
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}
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.img {
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object-fit: contain;
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}
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</style>
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