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<!--
SPDX-FileCopyrightText: syuilo and misskey-project
SPDX-License-Identifier: AGPL-3.0-only
-->
<template>
<svg :viewBox="`0 0 ${ viewBoxX } ${ viewBoxY }`" style="overflow:visible">
<defs>
<linearGradient :id="gradientId" x1="0" x2="0" y1="1" y2="0">
<stop offset="0%" :stop-color="color" stop-opacity="0"></stop>
<stop offset="100%" :stop-color="color" stop-opacity="0.65"></stop>
</linearGradient>
</defs>
<polygon
:points="polygonPoints"
:style="`stroke: none; fill: url(#${ gradientId });`"
/>
<polyline
:points="polylinePoints"
fill="none"
:stroke="color"
stroke-width="2"
/>
<circle
:cx="headX ?? undefined"
:cy="headY ?? undefined"
r="3"
:fill="color"
/>
</svg>
</template>
<script lang="ts" setup>
import { watch, ref } from 'vue';
import { v4 as uuid } from 'uuid';
import tinycolor from 'tinycolor2';
import { useInterval } from '@/scripts/use-interval.js';
const props = defineProps<{
src: number[];
}>();
const viewBoxX = 50;
const viewBoxY = 50;
const gradientId = uuid();
const polylinePoints = ref('');
const polygonPoints = ref('');
const headX = ref<number | null>(null);
const headY = ref<number | null>(null);
const clock = ref<number | null>(null);
const accent = tinycolor(getComputedStyle(document.documentElement).getPropertyValue('--accent'));
const color = accent.toRgbString();
function draw(): void {
const stats = props.src.slice().reverse();
const peak = Math.max.apply(null, stats) || 1;
const _polylinePoints = stats.map((n, i) => [
i * (viewBoxX / (stats.length - 1)),
(1 - (n / peak)) * viewBoxY,
]);
polylinePoints.value = _polylinePoints.map(xy => `${xy[0]},${xy[1]}`).join(' ');
polygonPoints.value = `0,${ viewBoxY } ${ polylinePoints.value } ${ viewBoxX },${ viewBoxY }`;
headX.value = _polylinePoints.at(-1)![0];
headY.value = _polylinePoints.at(-1)![1];
}
watch(() => props.src, draw, { immediate: true });
// Vueが何故かWatchを発動させない場合があるので
useInterval(draw, 1000, {
immediate: false,
afterMounted: true,
});
</script>
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