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Classic UI

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syuilo
2021-07-19 11:36:35 +09:00
parent 04e27e160e
commit 42d293ee60
19 changed files with 391 additions and 67 deletions
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16
src/client/scripts/sticky-sidebar.ts
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@ -7,8 +7,9 @@ export class StickySidebar {
private isTop = false;
private isBottom = false;
private offsetTop: number;
private globalHeaderHeight: number = 59;
constructor(container: StickySidebar['container'], marginTop = 0) {
constructor(container: StickySidebar['container'], marginTop = 0, globalHeaderHeight = 0) {
this.container = container;
this.el = this.container.children[0] as HTMLElement;
this.el.style.position = 'sticky';
@ -16,30 +17,31 @@ export class StickySidebar {
this.container.prepend(this.spacer);
this.marginTop = marginTop;
this.offsetTop = this.container.getBoundingClientRect().top;
this.globalHeaderHeight = globalHeaderHeight;
}
public calc(scrollTop: number) {
if (scrollTop > this.lastScrollTop) { // downscroll
const overflow = Math.max(0, (this.el.clientHeight + this.marginTop) - window.innerHeight);
const overflow = Math.max(0, this.globalHeaderHeight + (this.el.clientHeight + this.marginTop) - window.innerHeight);
this.el.style.bottom = null;
this.el.style.top = `${-overflow + this.marginTop}px`;
this.el.style.top = `${-overflow + this.marginTop + this.globalHeaderHeight}px`;
this.isBottom = (scrollTop + window.innerHeight) >= (this.el.offsetTop + this.el.clientHeight);
if (this.isTop) {
this.isTop = false;
this.spacer.style.marginTop = `${Math.max(0, this.lastScrollTop + this.marginTop - this.offsetTop)}px`;
this.spacer.style.marginTop = `${Math.max(0, this.globalHeaderHeight + this.lastScrollTop + this.marginTop - this.offsetTop)}px`;
}
} else { // upscroll
const overflow = (this.el.clientHeight + this.marginTop) - window.innerHeight;
const overflow = this.globalHeaderHeight + (this.el.clientHeight + this.marginTop) - window.innerHeight;
this.el.style.top = null;
this.el.style.bottom = `${-overflow}px`;
this.isTop = scrollTop <= this.el.offsetTop;
this.isTop = scrollTop + this.marginTop + this.globalHeaderHeight <= this.el.offsetTop;
if (this.isBottom) {
this.isBottom = false;
this.spacer.style.marginTop = `${this.lastScrollTop + this.marginTop - this.offsetTop - overflow}px`;
this.spacer.style.marginTop = `${this.globalHeaderHeight + this.lastScrollTop + this.marginTop - this.offsetTop - overflow}px`;
}
}