From 52dbab56a47f2242df08d95de8e0a58c5eb8ab9c Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Mon, 30 Oct 2023 15:16:59 +0900
Subject: [PATCH] tweak MkPullToRefresh

---
 .../src/components/MkPullToRefresh.vue        | 32 ++++++++++---------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/packages/frontend/src/components/MkPullToRefresh.vue b/packages/frontend/src/components/MkPullToRefresh.vue
index 0b5ae8e826..c38d0ff6a1 100644
--- a/packages/frontend/src/components/MkPullToRefresh.vue
+++ b/packages/frontend/src/components/MkPullToRefresh.vue
@@ -5,7 +5,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <div ref="rootEl">
-	<div v-if="isPullStart" :class="$style.frame" :style="`--frame-min-height: ${currentHeight / 3}px;`">
+	<div v-if="isPullStart" :class="$style.frame" :style="`--frame-min-height: ${pullDistance / (PULL_BRAKE_BASE + (pullDistance / PULL_BRAKE_FACTOR))}px;`">
 		<div :class="$style.frameContent">
 			<MkLoading v-if="isRefreshing" :class="$style.loader" :em="true"/>
 			<i v-else class="ti ti-arrow-bar-to-down" :class="[$style.icon, { [$style.refresh]: isPullEnd }]"></i>
@@ -29,13 +29,15 @@ import { i18n } from '@/i18n.js';
 
 const SCROLL_STOP = 10;
 const MAX_PULL_DISTANCE = Infinity;
-const FIRE_THRESHOLD = 200;
+const FIRE_THRESHOLD = 230;
 const RELEASE_TRANSITION_DURATION = 200;
+const PULL_BRAKE_BASE = 2;
+const PULL_BRAKE_FACTOR = 200;
 
 let isPullStart = $ref(false);
 let isPullEnd = $ref(false);
 let isRefreshing = $ref(false);
-let currentHeight = $ref(0);
+let pullDistance = $ref(0);
 
 let supportPointerDesktop = false;
 let startScreenY: number | null = null;
@@ -72,14 +74,14 @@ function moveStart(event) {
 	if (!isPullStart && !isRefreshing && !disabled) {
 		isPullStart = true;
 		startScreenY = getScreenY(event);
-		currentHeight = 0;
+		pullDistance = 0;
 	}
 }
 
 function moveBySystem(to: number): Promise<void> {
 	return new Promise(r => {
-		const startHeight = currentHeight;
-		const overHeight = currentHeight - to;
+		const startHeight = pullDistance;
+		const overHeight = pullDistance - to;
 		if (overHeight < 1) {
 			r();
 			return;
@@ -88,26 +90,26 @@ function moveBySystem(to: number): Promise<void> {
 		let intervalId = setInterval(() => {
 			const time = Date.now() - startTime;
 			if (time > RELEASE_TRANSITION_DURATION) {
-				currentHeight = to;
+				pullDistance = to;
 				clearInterval(intervalId);
 				r();
 				return;
 			}
 			const nextHeight = startHeight - (overHeight / RELEASE_TRANSITION_DURATION) * time;
-			if (currentHeight < nextHeight) return;
-			currentHeight = nextHeight;
+			if (pullDistance < nextHeight) return;
+			pullDistance = nextHeight;
 		}, 1);
 	});
 }
 
 async function fixOverContent() {
-	if (currentHeight > FIRE_THRESHOLD) {
+	if (pullDistance > FIRE_THRESHOLD) {
 		await moveBySystem(FIRE_THRESHOLD);
 	}
 }
 
 async function closeContent() {
-	if (currentHeight > 0) {
+	if (pullDistance > 0) {
 		await moveBySystem(0);
 	}
 }
@@ -131,8 +133,8 @@ function moving(event) {
 	if (!scrollEl) {
 		scrollEl = getScrollableParentElement(rootEl);
 	}
-	if ((scrollEl?.scrollTop ?? 0) > (supportPointerDesktop ? SCROLL_STOP : SCROLL_STOP + currentHeight)) {
-		currentHeight = 0;
+	if ((scrollEl?.scrollTop ?? 0) > (supportPointerDesktop ? SCROLL_STOP : SCROLL_STOP + pullDistance)) {
+		pullDistance = 0;
 		isPullEnd = false;
 		moveEnd();
 		return;
@@ -144,9 +146,9 @@ function moving(event) {
 	const moveScreenY = getScreenY(event);
 
 	const moveHeight = moveScreenY - startScreenY!;
-	currentHeight = Math.min(Math.max(moveHeight, 0), MAX_PULL_DISTANCE);
+	pullDistance = Math.min(Math.max(moveHeight, 0), MAX_PULL_DISTANCE);
 
-	isPullEnd = currentHeight >= FIRE_THRESHOLD;
+	isPullEnd = pullDistance >= FIRE_THRESHOLD;
 }
 
 /**