This commit is contained in:
truewhile
2026-10-08 20:13:46 +08:00
parent d7665e4ef0
commit 48a1c36a7a
2 changed files with 158 additions and 75 deletions
+157 -74
View File
@@ -1,4 +1,4 @@
import { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
import { memo, useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
import { useParams } from 'react-router-dom'
import toast from 'react-hot-toast'
import {
@@ -85,6 +85,84 @@ interface ReaderParagraphBlock {
comments: ReaderContentComment[]
}
/**
* 翻页模式正文列:与页码 state 解耦。
*
* 长章(几百页 CSS 多栏)里,若每次 setPage 都把整棵段落树再调和一遍,
* 手机主线程会卡数百毫秒,表现为「松手停一下才翻到下一页」。
* 分页位移改走 contentRef 命令式写入;这里用 memo,页码变时跳过段落重渲染。
*/
const ReaderTextPageBody = memo(function ReaderTextPageBody({
blocks,
paragraphSpacing,
fontSize,
accent,
onOpenComment,
}: {
blocks: ReaderParagraphBlock[]
paragraphSpacing: number
fontSize: number
accent: string
onOpenComment: (comment: ReaderContentComment) => void
}) {
return (
<>
{blocks.map((block, key) => {
const { text, comments } = block
if (text.startsWith(IMG_MARK)) {
return (
<p key={key} style={{ marginBottom: paragraphSpacing, textAlign: 'center' }}>
<img
src={text.slice(IMG_MARK.length)}
alt=""
referrerPolicy="no-referrer"
style={{ maxWidth: '100%', maxHeight: '70vh', margin: '0 auto', objectFit: 'contain' }}
/>
</p>
)
}
const standalone = text === '' && comments.length > 0
return (
<p
key={key}
style={{
textIndent: text ? '2em' : undefined,
marginBottom: paragraphSpacing,
textAlign: standalone && comments.every((c) => c.block) ? 'center' : undefined,
}}
>
{text}
{comments.map((c, ci) => (
<button
key={`${c.line}-${ci}`}
type="button"
onClick={(e) => {
e.stopPropagation()
onOpenComment(c)
}}
title={c.label || '段评'}
className="relative z-10 mx-1 inline-flex items-center gap-0.5 rounded-full border align-middle"
style={{
borderColor: accent,
color: accent,
fontSize: Math.max(10, fontSize - 4),
lineHeight: 1,
padding: '2px 6px',
verticalAlign: 'middle',
pointerEvents: 'auto',
}}
>
<MessageSquare size={11} />
{c.count > 0 && <span>{c.count}</span>}
</button>
))}
</p>
)
})}
</>
)
})
function firstReadableIndex(chapters: ReaderChapter[]): number {
const i = chapters.findIndex((c) => !c.is_volume && c.url)
if (i !== -1) return i
@@ -157,6 +235,13 @@ export default function ReaderViewPage() {
const [page, setPage] = useState(0)
const [pageCount, setPageCount] = useState(1)
const [vw, setVw] = useState(0)
// 文本翻页位移走命令式 transform(见 applyTextPageTransform):先改 DOM 再 setPage,
// 避免长章重渲染把翻页动画堵在主线程后面。下面几个 ref 用来去重 / 换章时关掉过渡。
const vwRef = useRef(0)
const appliedTextPageRef = useRef(-1)
const appliedTextVwRef = useRef(-1)
const snapTextPageRef = useRef(false)
vwRef.current = vw
// 音频/漫画媒体状态
const [media, setMedia] = useState<ReaderChapterContent | null>(null)
const [restorePos, setRestorePos] = useState(0) // 音频秒数 / 漫画图片序号
@@ -322,6 +407,9 @@ export default function ReaderViewPage() {
setContentType(ct.type)
setMedia(ct)
setContent(ct.content ?? '')
// 换章瞬移到目标页,不要带着上一章的翻页过渡滑过去。
snapTextPageRef.current = true
appliedTextPageRef.current = -1
setPage(0)
setComicPage(0)
setCurrentImage(0)
@@ -380,6 +468,18 @@ export default function ReaderViewPage() {
}, [chapterIndex, book, chapters, contentCacheKey, contentReloadKey])
// ── 分页排版(CSS 多栏 + 平移) ──
/** 把正文列平移到指定页。animate=true 时走 220ms 过渡;换章/重排传 false。 */
const applyTextPageTransform = useCallback((nextPage: number, animate: boolean) => {
const el = contentRef.current
if (!el) return
const width = vwRef.current > 0 ? vwRef.current : (viewportRef.current?.clientWidth ?? 0)
const stride = Math.max(width, 1) + COLUMN_GAP
el.style.transition = animate ? PAGE_TRANSITION : 'none'
el.style.transform = `translateX(-${nextPage * stride}px)`
appliedTextPageRef.current = nextPage
appliedTextVwRef.current = width
}, [])
const relayout = useCallback(() => {
const vp = viewportRef.current
if (!vp) return
@@ -388,6 +488,8 @@ export default function ReaderViewPage() {
const total = vp.scrollWidth
const count = Math.max(1, Math.ceil((total + COLUMN_GAP) / (width + COLUMN_GAP)))
setPageCount(count)
// 恢复进度 / 夹紧页码属于排版结果,不是用户翻页——关掉过渡,免得整章闪滑。
snapTextPageRef.current = true
setPage((p) => {
if (pendingEndRef.current && count > 0) {
pendingEndRef.current = false
@@ -406,6 +508,15 @@ export default function ReaderViewPage() {
relayout()
}, [relayout, content, settings.fontSize, settings.lineHeight, settings.paragraphSpacing, settings.pageMode, vw])
// 页码或列宽变了:若翻页回调里已经写过 transform 则跳过,避免把正在播的过渡重开一遍。
useLayoutEffect(() => {
if (contentType !== 'text' || settings.pageMode !== 'page') return
if (appliedTextPageRef.current === page && appliedTextVwRef.current === vw) return
const animate = !snapTextPageRef.current && appliedTextPageRef.current !== page
snapTextPageRef.current = false
applyTextPageTransform(page, animate)
}, [page, vw, contentType, settings.pageMode, applyTextPageTransform])
useEffect(() => {
const vp = viewportRef.current
if (!vp) return
@@ -631,9 +742,14 @@ export default function ReaderViewPage() {
scrollRef.current?.scrollBy({ top: -window.innerHeight * 0.9, behavior: 'auto' })
return
}
if (page > 0) setPage((p) => p - 1)
else goChapter(-1, true)
}, [contentType, settings.pageMode, comicDoublePage, comicSpreads, comicSpreadIndex, comicPage, page, goChapter])
// 文本翻页:先命令式挪正文列,再 setPage 更新页脚。顺序不能反——
// 否则长章重渲染会把过渡堵到卡顿结束才开始。
if (page > 0) {
const next = page - 1
applyTextPageTransform(next, true)
setPage(next)
} else goChapter(-1, true)
}, [contentType, settings.pageMode, comicDoublePage, comicSpreads, comicSpreadIndex, comicPage, page, goChapter, applyTextPageTransform])
const goNext = useCallback(() => {
if (contentType === 'audio') {
@@ -657,9 +773,12 @@ export default function ReaderViewPage() {
else el?.scrollBy({ top: window.innerHeight * 0.9, behavior: 'auto' })
return
}
if (page < pageCount - 1) setPage((p) => p + 1)
else goChapter(1)
}, [contentType, settings.pageMode, comicDoublePage, comicSpreads, comicSpreadIndex, media, comicPage, page, pageCount, goChapter])
if (page < pageCount - 1) {
const next = page + 1
applyTextPageTransform(next, true)
setPage(next)
} else goChapter(1)
}, [contentType, settings.pageMode, comicDoublePage, comicSpreads, comicSpreadIndex, media, comicPage, page, pageCount, goChapter, applyTextPageTransform])
// ── 点击分区(左 30% 上一页 / 中间呼出菜单 / 右 30% 下一页) ──
// 翻页模式用覆盖层上的三个按钮驱动;滚动模式不能再用覆盖层——
@@ -672,10 +791,10 @@ export default function ReaderViewPage() {
// 「滑动后浏览器补发的 click」的去重都在 useHorizontalSwipe 里)。
//
// 跟手拖拽平移的是两个不同的元素:
// - 文本:正文列外面单独挂一层「跟手层」(pageDragRef)。分页平移仍旧由 React 写在
// 里层,跟手层只管手指位移;松手时两层同时动——跟手位移归零 + 页码变化——
// 合起来就是一次连续滑动。分两层而不是直接改里层,是为了避免「跟手位移把 DOM
// 改成了 React 不知道的值、React 又认为 transform 没变而不去写」把页面留在拖动位置。
// - 文本:正文列外面单独挂一层「跟手层」(pageDragRef)。分页平移由 applyTextPageTransform
// 写在里层(contentRef),跟手层只管手指位移;松手时两层同时动——跟手位移归零 +
// 页码变化——合起来就是一次连续滑动。分两层是为了避免跟手位移和 React/命令式页码
// 位移互相覆盖;页码不再经 React style 下发,长章翻页才不会先卡主线程再开动画。
// - 漫画:平移 ReaderComic 的舞台(comicStageRef)。舞台两侧摆着上一页/下一页
// (见那边的 carousel 分支),翻页时单元格的 left 偏移与舞台位移在同一次提交里
// 相抵,画面看不出切换。
@@ -852,8 +971,11 @@ export default function ReaderViewPage() {
1000,
),
onChange: (v: number) => {
if (settings.pageMode === 'page') setPage(v - 1)
else {
if (settings.pageMode === 'page') {
const next = v - 1
applyTextPageTransform(next, true)
setPage(next)
} else {
const el = scrollRef.current
if (el) el.scrollTop = (v / 1000) * (el.scrollHeight - el.clientHeight)
}
@@ -905,62 +1027,13 @@ export default function ReaderViewPage() {
[book],
)
// 正文段落块:普通段落按缩进排版,[img] 行渲染成居中图片,段评在段末挂气泡
const renderParagraph = (block: ReaderParagraphBlock, key: number) => {
const { text, comments } = block
if (text.startsWith(IMG_MARK)) {
return (
<p key={key} style={{ marginBottom: settings.paragraphSpacing, textAlign: 'center' }}>
<img
src={text.slice(IMG_MARK.length)}
alt=""
referrerPolicy="no-referrer"
style={{ maxWidth: '100%', maxHeight: '70vh', margin: '0 auto', objectFit: 'contain' }}
/>
</p>
)
}
const standalone = text === '' && comments.length > 0
return (
<p
key={key}
style={{
textIndent: text ? '2em' : undefined,
marginBottom: settings.paragraphSpacing,
textAlign: standalone && comments.every((c) => c.block) ? 'center' : undefined,
}}
>
{text}
{comments.map((c, ci) => (
<button
key={`${c.line}-${ci}`}
type="button"
onClick={(e) => {
// 滚动容器的分区点击与翻页覆盖层都在上层,不拦住冒泡,
// 点气泡会顺带翻页或呼出菜单。
e.stopPropagation()
void openComment(c)
}}
title={c.label || '段评'}
// 外层正文档关掉了指针事件(见上面的层叠说明),气泡自己开关。
className="relative z-10 mx-1 inline-flex items-center gap-0.5 rounded-full border align-middle"
style={{
borderColor: theme.accent,
color: theme.accent,
fontSize: Math.max(10, settings.fontSize - 4),
lineHeight: 1,
padding: '2px 6px',
verticalAlign: 'middle',
pointerEvents: 'auto',
}}
>
<MessageSquare size={11} />
{c.count > 0 && <span>{c.count}</span>}
</button>
))}
</p>
)
}
// 段评点击:ReaderTextPageBody 要稳定回调,否则 memo 每次都失效。
const handleOpenComment = useCallback(
(comment: ReaderContentComment) => {
void openComment(comment)
},
[openComment],
)
// ── 渲染 ──
if (error && !book) {
@@ -1022,7 +1095,7 @@ export default function ReaderViewPage() {
style={menuShiftStyle}
>
<div ref={viewportRef} className="relative h-full overflow-hidden">
{/* 跟手层:跟手拖拽的位移写在这一层,分页平移仍旧写在里层(React 管)。 */}
{/* 跟手层:跟手位移写这里;分页平移由 applyTextPageTransform 写在 contentRef 上。 */}
<div ref={pageDragRef} className="h-full">
<div
ref={contentRef}
@@ -1031,13 +1104,17 @@ export default function ReaderViewPage() {
columnWidth: `${Math.max(vw, 1)}px`,
columnGap: `${COLUMN_GAP}px`,
columnFill: 'auto',
transform: `translateX(-${page * (vw + COLUMN_GAP)}px)`,
transition: PAGE_TRANSITION,
fontSize: settings.fontSize,
lineHeight: settings.lineHeight,
}}
>
{blocks.map((b, i) => renderParagraph(b, i))}
<ReaderTextPageBody
blocks={blocks}
paragraphSpacing={settings.paragraphSpacing}
fontSize={settings.fontSize}
accent={theme.accent}
onOpenComment={handleOpenComment}
/>
</div>
</div>
</div>
@@ -1062,7 +1139,13 @@ export default function ReaderViewPage() {
style={{ fontSize: settings.fontSize, lineHeight: settings.lineHeight, ...menuShiftStyle }}
>
<div className="py-4">
{blocks.map((b, i) => renderParagraph(b, i))}
<ReaderTextPageBody
blocks={blocks}
paragraphSpacing={settings.paragraphSpacing}
fontSize={settings.fontSize}
accent={theme.accent}
onOpenComment={handleOpenComment}
/>
</div>
</div>
)}