Sharkey/packages/frontend/src/scripts/scroll.ts
tamaina d2204fd5c8
refactor: pagination/date-separated-list系処理を良い感じに? (#8209)
* pages/messaging/messaging-room.vue

* wip

* wip

* wip???

* wip?

* ✌️

* messaaging-room.form.vue rewrite to compositon api

* refactor

* 関心事でないのでとりあえず置いておく

* 🎨

* 🎨

* i18n.ts

* fix scroll container find function

* fix

* FIX

* ✌️

* Fix scroll bottom detect

* wip

* aaaaaaaaaaa

* rename

* fix

* fix?

* ✌️

* ✌️

* clean up

* clena up

* refactor

* scroll event once or not

* fix

* fix once

* add safe-area-inset-bottom to spacer

* fix

* ✌️

* 🎨

* fix

* fix

* wip

* ✌️

* clean up

* fix lint

* Update packages/client/src/components/global/sticky-container.vue

Co-authored-by: Johann150 <johann.galle@protonmail.com>

* Update packages/client/src/components/ui/pagination.vue

Co-authored-by: Johann150 <johann.galle@protonmail.com>

* Update packages/client/src/pages/messaging/messaging-room.form.vue

Co-authored-by: Johann150 <johann.galle@protonmail.com>

* clean up: single line comment

* https://github.com/misskey-dev/misskey/pull/8209#discussion_r867386077

* fix

* asobi → tolerance

* pick form

* pick message

* pick room

* fix lint

* fix scroll?

* fix scroll.ts

* fix directives/sticky-container

* update global/sticky-container.vue

* fix, 🎨

* revert merge

* ✌️

* fix lint errors

* 🎨

* Update packages/client/src/types/date-separated-list.ts

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

* https://github.com/misskey-dev/misskey/pull/8209#discussion_r917225080

* use '

* Update packages/client/src/scripts/scroll.ts

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

* use Number.EPSILON

Co-authored-by: acid-chicken <root@acid-chicken.com>

* revert

* fix

* fix

* Use % instead of vh

* 🎨

* 🎨

* 🎨

* wip

* wip

* css modules

Co-authored-by: Johann150 <johann.galle@protonmail.com>
Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>
2023-01-13 18:25:40 +09:00

129 lines
3.9 KiB
TypeScript

type ScrollBehavior = 'auto' | 'smooth' | 'instant';
export function getScrollContainer(el: HTMLElement | null): HTMLElement | null {
if (el == null || el.tagName === 'HTML') return null;
const overflow = window.getComputedStyle(el).getPropertyValue('overflow-y');
if (overflow === 'scroll' || overflow === 'auto') {
return el;
} else {
return getScrollContainer(el.parentElement);
}
}
export function getStickyTop(el: HTMLElement, container: HTMLElement | null = null, top: number = 0) {
if (!el.parentElement) return top;
const data = el.dataset.stickyContainerHeaderHeight;
const newTop = data ? Number(data) + top : top;
if (el === container) return newTop;
return getStickyTop(el.parentElement, container, newTop);
}
export function getScrollPosition(el: HTMLElement | null): number {
const container = getScrollContainer(el);
return container == null ? window.scrollY : container.scrollTop;
}
export function onScrollTop(el: HTMLElement, cb: () => unknown, tolerance: number = 1, once: boolean = false) {
// とりあえず評価してみる
if (isTopVisible(el)) {
cb();
if (once) return null;
}
const container = getScrollContainer(el) || window;
const onScroll = ev => {
if (!document.body.contains(el)) return;
if (isTopVisible(el, tolerance)) {
cb();
if (once) removeListener();
}
};
function removeListener() { container.removeEventListener('scroll', onScroll); }
container.addEventListener('scroll', onScroll, { passive: true });
return removeListener;
}
export function onScrollBottom(el: HTMLElement, cb: () => unknown, tolerance: number = 1, once: boolean = false) {
const container = getScrollContainer(el);
// とりあえず評価してみる
if (isBottomVisible(el, tolerance, container)) {
cb();
if (once) return null;
}
const containerOrWindow = container || window;
const onScroll = ev => {
if (!document.body.contains(el)) return;
if (isBottomVisible(el, 1, container)) {
cb();
if (once) removeListener();
}
};
function removeListener() {
containerOrWindow.removeEventListener('scroll', onScroll);
}
containerOrWindow.addEventListener('scroll', onScroll, { passive: true });
return removeListener;
}
export function scroll(el: HTMLElement, options: ScrollToOptions | undefined) {
const container = getScrollContainer(el);
if (container == null) {
window.scroll(options);
} else {
container.scroll(options);
}
}
/**
* Scroll to Top
* @param el Scroll container element
* @param options Scroll options
*/
export function scrollToTop(el: HTMLElement, options: { behavior?: ScrollBehavior; } = {}) {
scroll(el, { top: 0, ...options });
}
/**
* Scroll to Bottom
* @param el Content element
* @param options Scroll options
* @param container Scroll container element
*/
export function scrollToBottom(
el: HTMLElement,
options: ScrollToOptions = {},
container = getScrollContainer(el),
) {
if (container) {
container.scroll({ top: el.scrollHeight - container.clientHeight + getStickyTop(el, container) || 0, ...options });
} else {
window.scroll({
top: (el.scrollHeight - window.innerHeight + getStickyTop(el, container) + (window.innerWidth <= 500 ? 96 : 0)) || 0,
...options
});
}
}
export function isTopVisible(el: HTMLElement, tolerance: number = 1): boolean {
const scrollTop = getScrollPosition(el);
return scrollTop <= tolerance;
}
export function isBottomVisible(el: HTMLElement, tolerance = 1, container = getScrollContainer(el)) {
if (container) return el.scrollHeight <= container.clientHeight + Math.abs(container.scrollTop) + tolerance;
return el.scrollHeight <= window.innerHeight + window.scrollY + tolerance;
}
// https://ja.javascript.info/size-and-scroll-window#ref-932
export function getBodyScrollHeight() {
return Math.max(
document.body.scrollHeight, document.documentElement.scrollHeight,
document.body.offsetHeight, document.documentElement.offsetHeight,
document.body.clientHeight, document.documentElement.clientHeight
);
}