86 lines
2.5 KiB
TypeScript
86 lines
2.5 KiB
TypeScript
import { Ref, ref, watch, onUnmounted } from 'vue';
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export function useTooltip(
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elRef: Ref<HTMLElement | { $el: HTMLElement } | null | undefined>,
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onShow: (showing: Ref<boolean>) => void,
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delay = 300,
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): void {
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let isHovering = false;
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// iOS(Androidも？)では、要素をタップした直後に(おせっかいで)mouseoverイベントを発火させたりするため、それを無視するためのフラグ
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// 無視しないと、画面に触れてないのにツールチップが出たりし、ユーザビリティが損なわれる
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// TODO: 一度でもタップすると二度とマウスでツールチップ出せなくなるのをどうにかする 定期的にfalseに戻すとか...？
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let shouldIgnoreMouseover = false;
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let timeoutId: number;
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let changeShowingState: (() => void) | null;
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const open = () => {
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close();
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if (!isHovering) return;
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if (elRef.value == null) return;
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const el = elRef.value instanceof Element ? elRef.value : elRef.value.$el;
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if (!document.body.contains(el)) return; // openしようとしたときに既に元要素がDOMから消えている場合があるため
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const showing = ref(true);
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onShow(showing);
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changeShowingState = () => {
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showing.value = false;
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};
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};
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const close = () => {
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if (changeShowingState != null) {
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changeShowingState();
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changeShowingState = null;
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}
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};
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const onMouseover = () => {
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if (isHovering) return;
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if (shouldIgnoreMouseover) return;
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isHovering = true;
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timeoutId = window.setTimeout(open, delay);
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};
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const onMouseleave = () => {
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if (!isHovering) return;
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isHovering = false;
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window.clearTimeout(timeoutId);
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close();
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};
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const onTouchstart = () => {
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shouldIgnoreMouseover = true;
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if (isHovering) return;
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isHovering = true;
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timeoutId = window.setTimeout(open, delay);
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};
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const onTouchend = () => {
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if (!isHovering) return;
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isHovering = false;
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window.clearTimeout(timeoutId);
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close();
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};
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const stop = watch(elRef, () => {
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if (elRef.value) {
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stop();
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const el = elRef.value instanceof Element ? elRef.value : elRef.value.$el;
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el.addEventListener('mouseover', onMouseover, { passive: true });
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el.addEventListener('mouseleave', onMouseleave, { passive: true });
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el.addEventListener('touchstart', onTouchstart, { passive: true });
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el.addEventListener('touchend', onTouchend, { passive: true });
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el.addEventListener('click', close, { passive: true });
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}
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}, {
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immediate: true,
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flush: 'post',
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});
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onUnmounted(() => {
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close();
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});
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}
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