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Fix the waveai scrolling so it tracks the bottom of the window better

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Evan Simkowitz 2024-12-20 14:26:10 -05:00
parent 254caffda8
commit c25302de7e
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1 changed files with 44 additions and 21 deletions
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43
frontend/app/view/waveai/waveai.tsx
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@ -16,6 +16,7 @@ import { atom, Atom, PrimitiveAtom, useAtomValue, WritableAtom } from "jotai";
import type { OverlayScrollbars } from "overlayscrollbars";
import { OverlayScrollbarsComponent, OverlayScrollbarsComponentRef } from "overlayscrollbars-react";
import { forwardRef, memo, useCallback, useEffect, useImperativeHandle, useMemo, useRef, useState } from "react";
import { debounce, throttle } from "throttle-debounce";
import "./waveai.scss";
interface ChatMessageType {
@ -433,8 +434,6 @@ function makeWaveAiViewModel(blockId: string): WaveAiModel {
const ChatItem = ({ chatItem, model }: ChatItemProps) => {
const { user, text } = chatItem;
const cssVar = "--panel-bg-color";
const panelBgColor = getComputedStyle(document.documentElement).getPropertyValue(cssVar).trim();
const fontSize = useOverrideConfigAtom(model.blockId, "ai:fontsize");
const fixedFontSize = useOverrideConfigAtom(model.blockId, "ai:fixedfontsize");
const renderContent = useMemo(() => {
@ -514,15 +513,17 @@ const ChatWindow = memo(
const osRef = useRef<OverlayScrollbarsComponentRef>(null);
const prevMessagesLenRef = useRef(messages.length);
const latestMessageRef = useRef<ChatMessageType>(null);
useImperativeHandle(ref, () => osRef.current as OverlayScrollbarsComponentRef);
useEffect(() => {
if (osRef.current && osRef.current.osInstance()) {
const handleNewMessage = useCallback(
throttle(100, (messages: ChatMessageType[]) => {
if (osRef.current?.osInstance()) {
const { viewport } = osRef.current.osInstance().elements();
const curMessagesLen = messages.length;
if (prevMessagesLenRef.current !== curMessagesLen || !isUserScrolling) {
setIsUserScrolling(false);
latestMessageRef.current = messages[curMessagesLen - 1];
viewport.scrollTo({
behavior: "auto",
top: chatWindowRef.current?.scrollHeight || 0,
@ -531,15 +532,37 @@ const ChatWindow = memo(
prevMessagesLenRef.current = curMessagesLen;
}
}, [messages, isUserScrolling]);
}),
[isUserScrolling]
);
useEffect(() => {
if (osRef.current && osRef.current.osInstance()) {
const { viewport } = osRef.current.osInstance().elements();
handleNewMessage(messages);
}, [messages]);
const handleUserScroll = () => {
// Wait 300 ms after the user stops scrolling to determine if the user is within 300px of the bottom of the chat window.
// If so, unset the user scrolling flag.
const determineUnsetScroll = useCallback(
debounce(300, () => {
const { viewport } = osRef.current.osInstance().elements();
if (viewport.scrollTop > chatWindowRef.current?.clientHeight - viewport.clientHeight - 30) {
setIsUserScrolling(false);
}
}),
[]
);
const handleUserScroll = useCallback(
throttle(100, () => {
setIsUserScrolling(true);
};
determineUnsetScroll();
}),
[]
);
useEffect(() => {
if (osRef.current?.osInstance()) {
const { viewport } = osRef.current.osInstance().elements();
viewport.addEventListener("wheel", handleUserScroll, { passive: true });
viewport.addEventListener("touchmove", handleUserScroll, { passive: true });