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tamaina 2023-07-13 05:27:53 +00:00
parent 877a7a81bb
commit fae912a754
1 changed files with 18 additions and 25 deletions
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43
packages/frontend/src/components/MkPagination.vue
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@ -161,6 +161,12 @@ let timerForSetPause: number | null = null;
const BACKGROUND_PAUSE_WAIT_SEC = 10;
//#region scrolling
const checkFn = props.pagination.reversed ? isBottomVisible : isTopVisible;
const checkTop = () => {
if (!contentEl) return;
if (!document.body.contains(contentEl)) return;
return checkFn(contentEl, TOLERANCE, scrollableElement);
};
/**
* IntersectionObserverで大まかに検出
* https://qiita.com/mkataigi/items/0154aefd2223ce23398e
@ -172,15 +178,14 @@ watch([() => props.pagination.reversed, $$(scrollableElement)], () => {
scrollObserver = new IntersectionObserver(entries => {
weakBacked = entries[0].isIntersecting;
if (weakBacked) backed = true;
}, {
root: scrollableElementOrHtml,
root: scrollableElement,
rootMargin: props.pagination.reversed ? '-100% 0px 100% 0px' : '100% 0px -100% 0px',
threshold: 0.1, // 10%ぐらいになったらqueueを読む
});
}, { immediate: true });
watch($$(rootEl), () => {
watch([$$(rootEl), $$(scrollObserver)], () => {
scrollObserver?.disconnect();
nextTick(() => {
if (rootEl) scrollObserver?.observe(rootEl);
@ -197,33 +202,26 @@ watch($$(backed), () => {
});
watch([$$(weakBacked), $$(contentEl)], () => {
if (scrollRemove) scrollRemove();
scrollRemove = null;
if (weakBacked || !contentEl) {
if (scrollRemove) scrollRemove();
scrollRemove = null;
if (weakBacked) backed = true;
return;
}
scrollRemove = (() => {
const checkFn = props.pagination.reversed ? isBottomVisible : isTopVisible;
const el = contentEl;
const tolerance = TOLERANCE;
const onScroll = () => {
if (!document.body.contains(el)) return;
if (checkFn(el, tolerance)) {
backed = false;
} else {
backed = true;
}
const checkBacked = () => {
backed = !checkTop();
};
// とりあえず評価してみる
onScroll();
checkBacked();
const container = scrollableElementOrHtml;
function removeListener() { container.removeEventListener('scroll', onScroll); }
container.addEventListener('scroll', onScroll, { passive: true });
container.addEventListener('scroll', checkBacked, { passive: true });
return removeListener;
})();
});
@ -240,10 +238,6 @@ function adjustScroll(fn: () => void): Promise<void> {
return nextTick(() => {
const top = oldScroll + ((scrollableElement ? scrollableElement.scrollHeight : getBodyScrollHeight()) - oldHeight);
scroll(scrollableElement, { top, behavior: 'instant' });
if (top > TOLERANCE) {
weakBacked = true;
backed = true;
}
return nextTick();
});
}
@ -295,12 +289,11 @@ async function init(): Promise<void> {
function scrollAfterInit() {
if (props.pagination.reversed) {
nextTick(() => {
setTimeout(() => {
setTimeout(async () => {
if (contentEl) {
scrollToBottom(contentEl);
// scrollToしてもbacked周りがうまく動かないので手動で戻す必要がある
weakBacked = false;
backed = false;
}
}, 200);
@ -316,7 +309,6 @@ function scrollAfterInit() {
scrollToTop(scrollableElement);
// scrollToしてもbacked周りがうまく動かないので手動で戻す必要がある
weakBacked = false;
backed = false;
moreFetching.value = false;
}, 200);
@ -523,6 +515,7 @@ async function executeQueue() {
Infinity,
);
});
weakBacked = !checkTop();
items.value = new Map([...items.value].slice(0, displayLimit.value));
await nextTick();
isPausingUpdate = false;