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<!--
SPDX-FileCopyrightText: syuilo and misskey-project
SPDX-License-Identifier: AGPL-3.0-only
-->
<template>
<span :class="$style.container">
<span ref="content" :class="$style.content">
<slot/>
</span>
</span>
</template>
<script lang="ts">
interface Props {
readonly minScale?: number;
}
const contentSymbol = Symbol();
const observer = new ResizeObserver((entries) => {
const results: {
container: HTMLSpanElement;
transform: string;
}[] = [];
for (const entry of entries) {
const content = (entry.target[contentSymbol] ? entry.target : entry.target.firstElementChild) as HTMLSpanElement;
const props: Required<Props> = content[contentSymbol];
const container = content.parentElement as HTMLSpanElement;
const contentWidth = content.getBoundingClientRect().width;
const containerWidth = container.getBoundingClientRect().width;
results.push({ container, transform: `scaleX(${Math.max(props.minScale, Math.min(1, containerWidth / contentWidth))})` });
}
for (const result of results) {
result.container.style.transform = result.transform;
}
});
</script>
<script setup lang="ts">
import { ref, watch } from 'vue';
const props = withDefaults(defineProps<Props>(), {
minScale: 0,
});
const content = ref<HTMLSpanElement>();
watch(content, (value, oldValue) => {
if (oldValue) {
delete oldValue[contentSymbol];
observer.unobserve(oldValue);
if (oldValue.parentElement) {
observer.unobserve(oldValue.parentElement);
}
}
if (value) {
value[contentSymbol] = props;
observer.observe(value);
if (value.parentElement) {
observer.observe(value.parentElement);
}
}
});
</script>
<style module lang="scss">
.container {
display: inline-block;
max-width: 100%;
transform-origin: 0;
}
.content {
display: inline-block;
white-space: nowrap;
}
</style>
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