91 lines
2.4 KiB
Vue
91 lines
2.4 KiB
Vue
<template>
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<div ref="rootEl">
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<div ref="headerEl">
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<slot name="header"></slot>
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</div>
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<div ref="bodyEl" :data-sticky-container-header-height="headerHeight">
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<slot></slot>
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</div>
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<div ref="footerEl">
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<slot name="footer"></slot>
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</div>
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</div>
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</template>
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<script lang="ts" setup>
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import { onMounted, onUnmounted, provide, inject, Ref, ref, watch } from 'vue';
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import { CURRENT_STICKY_BOTTOM, CURRENT_STICKY_TOP } from '@/const';
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const rootEl = $shallowRef<HTMLElement>();
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const headerEl = $shallowRef<HTMLElement>();
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const footerEl = $shallowRef<HTMLElement>();
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const bodyEl = $shallowRef<HTMLElement>();
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let headerHeight = $ref<string | undefined>();
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let childStickyTop = $ref(0);
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const parentStickyTop = inject<Ref<number>>(CURRENT_STICKY_TOP, ref(0));
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provide(CURRENT_STICKY_TOP, $$(childStickyTop));
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let footerHeight = $ref<string | undefined>();
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let childStickyBottom = $ref(0);
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const parentStickyBottom = inject<Ref<number>>(CURRENT_STICKY_BOTTOM, ref(0));
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provide(CURRENT_STICKY_BOTTOM, $$(childStickyBottom));
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const calc = () => {
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// 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
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if (headerEl != null) {
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childStickyTop = parentStickyTop.value + headerEl.offsetHeight;
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headerHeight = headerEl.offsetHeight.toString();
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}
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// 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
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if (footerEl != null) {
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childStickyBottom = parentStickyBottom.value + footerEl.offsetHeight;
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footerHeight = footerEl.offsetHeight.toString();
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}
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};
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const observer = new ResizeObserver(() => {
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window.setTimeout(() => {
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calc();
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}, 100);
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});
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onMounted(() => {
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calc();
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watch([parentStickyTop, parentStickyBottom], calc);
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watch($$(childStickyTop), () => {
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bodyEl.style.setProperty('--stickyTop', `${childStickyTop}px`);
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}, {
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immediate: true,
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});
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watch($$(childStickyBottom), () => {
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bodyEl.style.setProperty('--stickyBottom', `${childStickyBottom}px`);
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}, {
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immediate: true,
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});
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headerEl.style.position = 'sticky';
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headerEl.style.top = 'var(--stickyTop, 0)';
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headerEl.style.zIndex = '1000';
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footerEl.style.position = 'sticky';
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footerEl.style.bottom = 'var(--stickyBottom, 0)';
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footerEl.style.zIndex = '1000';
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observer.observe(headerEl);
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observer.observe(footerEl);
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});
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onUnmounted(() => {
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observer.disconnect();
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});
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</script>
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<style lang="scss" module>
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</style>
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