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<!--
SPDX-FileCopyrightText: syuilo and misskey-project
SPDX-License-Identifier: AGPL-3.0-only
-->
<template>
<div ref="rootEl">
<div ref="headerEl" :class="$style.header">
<slot name="header"></slot>
</div>
<div
:class="$style.body"
:data-sticky-container-header-height="headerHeight"
:data-sticky-container-footer-height="footerHeight"
>
<slot></slot>
</div>
<div ref="footerEl" :class="$style.footer">
<slot name="footer"></slot>
</div>
</div>
</template>
<script lang="ts" setup>
import { onMounted, onUnmounted, provide, inject, ref, watch, useTemplateRef } from 'vue';
import { DI } from '@/di.js';
const rootEl = useTemplateRef('rootEl');
const headerEl = useTemplateRef('headerEl');
const footerEl = useTemplateRef('footerEl');
const headerHeight = ref<string | undefined>();
const childStickyTop = ref(0);
const parentStickyTop = inject(DI.currentStickyTop, ref(0));
provide(DI.currentStickyTop, childStickyTop);
const footerHeight = ref<string | undefined>();
const childStickyBottom = ref(0);
const parentStickyBottom = inject(DI.currentStickyBottom, ref(0));
provide(DI.currentStickyBottom, childStickyBottom);
const calc = () => {
// コンポーネントが表示されてないけどKeepAliveで残ってる場合などは null になる
if (headerEl.value != null) {
childStickyTop.value = parentStickyTop.value + headerEl.value.offsetHeight;
headerHeight.value = headerEl.value.offsetHeight.toString();
}
// コンポーネントが表示されてないけどKeepAliveで残ってる場合などは null になる
if (footerEl.value != null) {
childStickyBottom.value = parentStickyBottom.value + footerEl.value.offsetHeight;
footerHeight.value = footerEl.value.offsetHeight.toString();
}
};
const observer = new ResizeObserver(() => {
window.setTimeout(() => {
calc();
}, 100);
});
onMounted(() => {
calc();
watch([parentStickyTop, parentStickyBottom], calc);
if (headerEl.value != null) {
observer.observe(headerEl.value);
}
if (footerEl.value != null) {
observer.observe(footerEl.value);
}
});
onUnmounted(() => {
observer.disconnect();
});
defineExpose({
rootEl,
});
</script>
<style lang='scss' module>
.body {
position: relative;
z-index: 0;
--MI-stickyTop: v-bind("childStickyTop + 'px'");
--MI-stickyBottom: v-bind("childStickyBottom + 'px'");
}
.header {
position: sticky;
top: var(--MI-stickyTop, 0);
z-index: 1;
}
.footer {
position: sticky;
bottom: var(--MI-stickyBottom, 0);
z-index: 1;
}
</style>
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