Files
Moku/_old/features/reader/components/PageView.svelte
T
2026-05-22 04:04:59 -05:00

710 lines
27 KiB
Svelte
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
<script lang="ts">
import { store } from "@store/state.svelte";
import { readerState } from "../store/readerState.svelte";
import type { StripChapter } from "../lib/scrollHandler";
import { createPinchTracker } from "../lib/pinchZoom";
import type { PinchTracker } from "../lib/pinchZoom";
interface Props {
style: string;
imgCls: string;
effectiveWidth: number | undefined;
loading: boolean;
error: string | null;
pageReady: boolean;
pageGroups: number[][];
currentGroup: number[];
stripToRender: StripChapter[];
fadingOut: boolean;
tapToToggleBar: boolean;
pinchZoomEnabled: boolean;
chapterEpoch: number;
barPosition: "top" | "left" | "right";
onGetZoom: () => number;
onSetZoom: (z: number) => void;
resolveUrl: (url: string, priority?: number) => Promise<string>;
onTap: (e: MouseEvent) => void;
onWheel: (e: WheelEvent) => void;
onToggleUi: () => void;
bindContainer: (el: HTMLDivElement) => void;
}
const {
style, imgCls, effectiveWidth, loading, error, pageReady,
pageGroups, currentGroup, stripToRender, fadingOut,
tapToToggleBar, pinchZoomEnabled, chapterEpoch, barPosition, onGetZoom, onSetZoom,
resolveUrl, onTap, onWheel, onToggleUi, bindContainer,
}: Props = $props();
const LOAD_RADIUS = 5;
const UNLOAD_RADIUS = 10;
type FlatPage = { chapterId: number; chapterName: string; localIndex: number; url: string; total: number };
const flatPages = $derived.by<FlatPage[]>(() => {
const out: FlatPage[] = [];
for (const chunk of stripToRender) {
for (let i = 0; i < chunk.urls.length; i++) {
out.push({ chapterId: chunk.chapterId, chapterName: chunk.chapterName, localIndex: i, url: chunk.urls[i], total: chunk.urls.length });
}
}
return out;
});
let loadedSet = $state(new Set<number>());
let resolvedSrc = $state<Record<number, string>>({});
let revokeQueue: string[] = [];
let observer: IntersectionObserver | null = null;
const elementIndex = new Map<Element, number>();
let viewportCenter = $state(0);
function scheduleRevoke(src: string) {
if (!src || !src.startsWith("blob:")) return;
revokeQueue.push(src);
requestAnimationFrame(() => {
const url = revokeQueue.shift();
if (url) {
try { URL.revokeObjectURL(url); } catch { }
}
});
}
function loadPage(idx: number) {
if (loadedSet.has(idx)) return;
const page = flatPages[idx];
if (!page) return;
const newSet = new Set(loadedSet);
newSet.add(idx);
loadedSet = newSet;
const priority = (page.localIndex < 8 && page.chapterId === flatPages[0]?.chapterId) ? 8 - page.localIndex : 0;
resolveUrl(page.url, priority).then(src => {
if (loadedSet.has(idx)) {
resolvedSrc = { ...resolvedSrc, [idx]: src };
} else {
scheduleRevoke(src);
}
});
}
function unloadPage(idx: number) {
if (!loadedSet.has(idx)) return;
const newSet = new Set(loadedSet);
newSet.delete(idx);
loadedSet = newSet;
const oldSrc = resolvedSrc[idx];
if (oldSrc) {
const next = { ...resolvedSrc };
delete next[idx];
resolvedSrc = next;
scheduleRevoke(oldSrc);
}
}
function recalcWindow() {
const center = viewportCenter;
const lo = center - LOAD_RADIUS;
const hi = center + LOAD_RADIUS;
const evictLo = center - UNLOAD_RADIUS;
const evictHi = center + UNLOAD_RADIUS;
for (let i = 0; i < flatPages.length; i++) {
if (i >= lo && i <= hi) {
loadPage(i);
} else if (i < evictLo || i > evictHi) {
unloadPage(i);
}
}
}
$effect(() => {
void viewportCenter;
recalcWindow();
});
$effect(() => {
void flatPages.length;
recalcWindow();
});
function setupObserver(containerEl: HTMLElement) {
observer?.disconnect();
elementIndex.clear();
observer = new IntersectionObserver(
(entries) => {
let best = -1;
let bestRatio = -1;
for (const entry of entries) {
const idx = elementIndex.get(entry.target);
if (idx === undefined) continue;
if (entry.isIntersecting && entry.intersectionRatio > bestRatio) {
bestRatio = entry.intersectionRatio;
best = idx;
}
}
if (best >= 0 && best !== viewportCenter) {
viewportCenter = best;
}
},
{
root: containerEl,
rootMargin: "0px",
threshold: [0, 0.1, 0.5, 1.0],
}
);
}
function observePage(el: HTMLDivElement, idx: number) {
elementIndex.set(el, idx);
observer?.observe(el);
return {
update(newIdx: number) {
elementIndex.set(el, newIdx);
},
destroy() {
observer?.unobserve(el);
elementIndex.delete(el);
}
};
}
$effect(() => {
void chapterEpoch;
loadedSet = new Set<number>();
resolvedSrc = {};
const resume = readerState.resumePage;
viewportCenter = resume > 1 ? resume - 1 : 0;
});
const INSPECT_ZOOM_STEP = 0.15;
const INSPECT_ZOOM_MAX = 8;
let containerEl: HTMLDivElement;
function getInspectImageEl(): HTMLElement | null {
if (!containerEl) return null;
return (
containerEl.querySelector<HTMLElement>(".inspect-wrap .double-wrap") ??
containerEl.querySelector<HTMLElement>(".inspect-wrap img")
);
}
function clampInspectPan(scale: number, px: number, py: number): [number, number] {
const img = getInspectImageEl();
if (!img) return [px, py];
const maxX = Math.max(0, (img.offsetWidth * (scale - 1)) / 2);
const maxY = Math.max(0, (img.offsetHeight * (scale - 1)) / 2);
return [Math.max(-maxX, Math.min(maxX, px)), Math.max(-maxY, Math.min(maxY, py))];
}
let inspectDragging = false;
let inspectDragMoved = false;
let inspectDragStartX = 0;
let inspectDragStartY = 0;
let inspectPanStartX = 0;
let inspectPanStartY = 0;
let stripDragging = $state(false);
let stripDragMoved = false;
let stripDragStartY = 0;
let stripScrollStart = 0;
let autoScrollPaused = false;
let autoScrollPauseTimer: ReturnType<typeof setTimeout> | null = null;
let midScrollActive = $state(false);
let midScrollOriginY = $state(0);
let midScrollOriginX = $state(0);
let midScrollCurrentY = 0;
let midScrollRaf: number | null = null;
// Speed level 0-5 for the indicator bar
const midScrollSpeedLevel = $derived.by(() => {
if (!midScrollActive) return 0;
// recomputes when midScrollOriginY changes; actual dy read in RAF so this is just for display
return 0; // will be updated imperatively
});
let midScrollDisplayLevel = $state(0);
function startMidScroll(originY: number, originX: number) {
midScrollActive = true;
midScrollOriginY = originY;
midScrollOriginX = originX;
midScrollDisplayLevel = 0;
if (midScrollRaf) cancelAnimationFrame(midScrollRaf);
const tick = () => {
if (!midScrollActive || !containerEl) return;
const dy = midScrollCurrentY - midScrollOriginY;
const deadZone = 24;
const excess = Math.max(0, Math.abs(dy) - deadZone);
const speed = Math.sign(dy) * excess * 0.12;
containerEl.scrollTop += speed;
midScrollDisplayLevel = Math.sign(dy) * Math.min(5, Math.floor(excess / 30));
midScrollRaf = requestAnimationFrame(tick);
};
midScrollRaf = requestAnimationFrame(tick);
}
function stopMidScroll() {
midScrollActive = false;
midScrollDisplayLevel = 0;
if (midScrollRaf) { cancelAnimationFrame(midScrollRaf); midScrollRaf = null; }
}
function pauseAutoScroll() {
autoScrollPaused = true;
if (autoScrollPauseTimer) clearTimeout(autoScrollPauseTimer);
autoScrollPauseTimer = setTimeout(() => { autoScrollPaused = false; }, 2500);
}
$effect(() => {
if (style !== "longstrip" || !store.settings.autoScroll) return;
let rafId: number;
const tick = () => {
if (!autoScrollPaused && containerEl) containerEl.scrollTop += (store.settings.autoScrollSpeed ?? 5) * 0.5;
rafId = requestAnimationFrame(tick);
};
rafId = requestAnimationFrame(tick);
return () => cancelAnimationFrame(rafId);
});
let pinch: PinchTracker | null = null;
$effect(() => {
if (pinchZoomEnabled) {
pinch = createPinchTracker({
getZoom: onGetZoom,
setZoom: onSetZoom,
getInspectScale: () => readerState.inspectScale,
setInspectScale: (s) => { readerState.inspectScale = s; },
resetInspectPan: () => { readerState.inspectPanX = 0; readerState.inspectPanY = 0; },
isLongstrip: () => style === "longstrip",
});
} else {
pinch = null;
}
});
export function onInspectMouseDown(e: MouseEvent) {
if ((e.target as Element).closest(".bar")) return;
if (e.button === 1 && style === "longstrip") {
e.preventDefault();
if (midScrollActive) { stopMidScroll(); } else {
// pause regular auto-scroll while mid-scroll is active
store.settings.autoScroll = false;
startMidScroll(e.clientY, e.clientX);
}
return;
}
if (style === "longstrip") {
stripDragging = true;
stripDragMoved = false;
stripDragStartY = e.clientY;
stripScrollStart = containerEl?.scrollTop ?? 0;
pauseAutoScroll();
e.preventDefault();
return;
}
if (readerState.inspectScale <= 1) return;
inspectDragging = true;
inspectDragMoved = false;
inspectDragStartX = e.clientX;
inspectDragStartY = e.clientY;
inspectPanStartX = readerState.inspectPanX;
inspectPanStartY = readerState.inspectPanY;
e.preventDefault();
}
export function onInspectMouseMove(e: MouseEvent) {
midScrollCurrentY = e.clientY;
if (stripDragging) {
const dy = e.clientY - stripDragStartY;
if (!stripDragMoved && Math.abs(dy) > 4) stripDragMoved = true;
if (containerEl) containerEl.scrollTop = stripScrollStart - dy;
return;
}
if (!inspectDragging) return;
if (!inspectDragMoved && Math.abs(e.clientX - inspectDragStartX) + Math.abs(e.clientY - inspectDragStartY) > 4) inspectDragMoved = true;
const rawX = inspectPanStartX + (e.clientX - inspectDragStartX);
const rawY = inspectPanStartY + (e.clientY - inspectDragStartY);
const [cx, cy] = clampInspectPan(readerState.inspectScale, rawX, rawY);
readerState.inspectPanX = cx;
readerState.inspectPanY = cy;
}
export function onInspectMouseUp() {
stripDragging = false;
inspectDragging = false;
}
export function onPointerDown(e: PointerEvent) {
if ((e.target as Element).closest(".bar")) return;
pinch?.onPointerDown(e);
}
export function onPointerMove(e: PointerEvent) {
if (pinch?.isPinching()) {
pinch.onPointerMove(e);
return;
}
if (stripDragging) {
const dy = e.clientY - stripDragStartY;
if (!stripDragMoved && Math.abs(dy) > 4) stripDragMoved = true;
if (containerEl) containerEl.scrollTop = stripScrollStart - dy;
}
if (inspectDragging) {
if (!inspectDragMoved && Math.abs(e.clientX - inspectDragStartX) + Math.abs(e.clientY - inspectDragStartY) > 4) inspectDragMoved = true;
const rawX = inspectPanStartX + (e.clientX - inspectDragStartX);
const rawY = inspectPanStartY + (e.clientY - inspectDragStartY);
const [cx, cy] = clampInspectPan(readerState.inspectScale, rawX, rawY);
readerState.inspectPanX = cx;
readerState.inspectPanY = cy;
}
}
export function onPointerUp(e: PointerEvent) {
pinch?.onPointerUp(e);
if (!pinch?.isPinching()) {
stripDragging = false;
inspectDragging = false;
}
}
export function handleWheel(e: WheelEvent) {
if (style === "longstrip") {
if (e.ctrlKey) { onWheel(e); }
else pauseAutoScroll();
return;
}
if (!e.ctrlKey) { onWheel(e); return; }
e.preventDefault();
const delta = e.deltaY < 0 ? INSPECT_ZOOM_STEP : -INSPECT_ZOOM_STEP;
const next = Math.max(1, Math.min(INSPECT_ZOOM_MAX, readerState.inspectScale + delta));
if (next === readerState.inspectScale) return;
if (next === 1) { readerState.inspectScale = 1; readerState.inspectPanX = 0; readerState.inspectPanY = 0; return; }
const img = getInspectImageEl();
const anchor = img ?? containerEl;
const rect = anchor?.getBoundingClientRect();
const cx = rect ? e.clientX - rect.left - rect.width / 2 : 0;
const cy = rect ? e.clientY - rect.top - rect.height / 2 : 0;
const ratio = next / readerState.inspectScale;
const rawPanX = cx + (readerState.inspectPanX - cx) * ratio;
const rawPanY = cy + (readerState.inspectPanY - cy) * ratio;
const [clampedX, clampedY] = clampInspectPan(next, rawPanX, rawPanY);
readerState.inspectScale = next;
readerState.inspectPanX = clampedX;
readerState.inspectPanY = clampedY;
}
function handleTap(e: MouseEvent) {
if (style === "longstrip") {
if (stripDragMoved) { stripDragMoved = false; return; }
return;
}
if (inspectDragMoved) { inspectDragMoved = false; return; }
if (stripDragMoved) { stripDragMoved = false; return; }
onTap(e);
}
function setContainer(el: HTMLDivElement) {
containerEl = el;
bindContainer(el);
if (style === "longstrip") setupObserver(el);
}
$effect(() => {
if (style === "longstrip" && containerEl) {
setupObserver(containerEl);
} else if (style !== "longstrip") {
observer?.disconnect();
observer = null;
stopMidScroll();
}
});
</script>
<div
use:setContainer
class="viewer"
class:strip={style === "longstrip"}
class:inspect-active={readerState.inspectScale > 1}
class:midscroll-active={midScrollActive}
style={effectiveWidth != null ? `--effective-width:${effectiveWidth}px` : ""}
role="presentation"
tabindex="-1"
onclick={handleTap}
onauxclick={(e) => { if (e.button === 1 && style === "longstrip") e.preventDefault(); }}
ondblclick={() => { if (tapToToggleBar) onToggleUi(); }}
onmousedown={onInspectMouseDown}
onpointerdown={pinchZoomEnabled ? onPointerDown : undefined}
onwheel={(e) => { if (e.ctrlKey || style !== "longstrip") e.preventDefault(); }}
style:cursor={style === "longstrip" ? (stripDragging ? "grabbing" : "grab") : undefined}
onkeydown={(e) => {
if (e.key === " " && style === "longstrip") { e.preventDefault(); store.settings.autoScroll = !store.settings.autoScroll; return; }
if ((e.key === "ArrowLeft" || e.key === "ArrowRight" || e.key === "ArrowUp" || e.key === "ArrowDown") && style !== "longstrip") e.preventDefault();
}}
>
{#if midScrollActive}
<div class="midscroll-bar" class:midscroll-bar-right={barPosition !== "right"} class:midscroll-bar-left={barPosition === "right"}>
<div class="midscroll-segments">
{#each [5,4,3,2,1] as n}
<div class="midscroll-seg" class:midscroll-seg-lit={midScrollDisplayLevel < 0 && -midScrollDisplayLevel >= n}></div>
{/each}
<div class="midscroll-origin-dot"></div>
{#each [1,2,3,4,5] as n}
<div class="midscroll-seg" class:midscroll-seg-lit={midScrollDisplayLevel > 0 && midScrollDisplayLevel >= n}></div>
{/each}
</div>
<button class="midscroll-stop" onclick={stopMidScroll} title="Stop (middle click)">
<svg width="8" height="8" viewBox="0 0 8 8"><rect x="0" y="0" width="8" height="8" rx="1" fill="currentColor"/></svg>
</button>
</div>
{/if}
{#if loading}
<div class="center-overlay">
<div class="page-loader page-loader-single" aria-hidden="true"><svg class="panel-skeleton" viewBox="0 0 100 150" fill="none" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid meet"><rect class="ps-r ps-r1" x="2" y="2" width="62" height="88" rx="1"/><rect class="ps-r ps-r2" x="68" y="2" width="30" height="42" rx="1"/><rect class="ps-r ps-r3" x="68" y="48" width="30" height="42" rx="1"/><rect class="ps-r ps-r4" x="2" y="94" width="44" height="54" rx="1"/><rect class="ps-r ps-r5" x="50" y="94" width="48" height="54" rx="1"/></svg></div>
</div>
{/if}
{#if error}
<div class="center-overlay"><p class="error-msg">{error}</p></div>
{/if}
{#key chapterEpoch}
{#if style === "longstrip"}
{#each flatPages as page, gi (page.chapterId + ":" + page.localIndex)}
{@const src = resolvedSrc[gi]}
{@const isLoaded = loadedSet.has(gi)}
<div
class="strip-slot"
use:observePage={gi}
data-gi={gi}
>
{#if isLoaded && src}
<img
src={src}
alt="{page.chapterName} Page {page.localIndex + 1}"
data-local-page={page.localIndex + 1}
data-chapter={page.chapterId}
data-total={page.total}
class="{imgCls}{store.settings.pageGap ? ' strip-gap' : ''}"
loading="eager"
decoding="async"
draggable="false"
onload={(e) => {
const img = e.currentTarget as HTMLImageElement;
const slot = img.closest<HTMLElement>(".strip-slot");
if (slot && img.naturalWidth > 0) {
slot.style.setProperty("--aspect", String(img.naturalWidth / img.naturalHeight));
}
}}
/>
{:else}
<div class="strip-placeholder" aria-hidden="true">
<svg class="panel-skeleton" viewBox="0 0 100 150" fill="none" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid meet"><rect class="ps-r ps-r1" x="2" y="2" width="62" height="88" rx="1"/><rect class="ps-r ps-r2" x="68" y="2" width="30" height="42" rx="1"/><rect class="ps-r ps-r3" x="68" y="48" width="30" height="42" rx="1"/><rect class="ps-r ps-r4" x="2" y="94" width="44" height="54" rx="1"/><rect class="ps-r ps-r5" x="50" y="94" width="48" height="54" rx="1"/></svg>
</div>
{/if}
</div>
{/each}
<div style="height:1px;flex-shrink:0"></div>
{:else if style === "fade" && pageReady}
<div class="inspect-wrap" style="transform:scale({readerState.inspectScale}) translate({readerState.inspectPanX / readerState.inspectScale}px,{readerState.inspectPanY / readerState.inspectScale}px)">
{#await resolveUrl(store.pageUrls[store.pageNumber - 1], 999)}
<div class="page-loader page-loader-single" aria-hidden="true">
<svg class="panel-skeleton" viewBox="0 0 100 150" fill="none" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid meet"><rect class="ps-r ps-r1" x="2" y="2" width="62" height="88" rx="1"/><rect class="ps-r ps-r2" x="68" y="2" width="30" height="42" rx="1"/><rect class="ps-r ps-r3" x="68" y="48" width="30" height="42" rx="1"/><rect class="ps-r ps-r4" x="2" y="94" width="44" height="54" rx="1"/><rect class="ps-r ps-r5" x="50" y="94" width="48" height="54" rx="1"/></svg>
</div>
{:then src}
<img {src} alt="Page {store.pageNumber}" class={imgCls} decoding="async" style="opacity: {fadingOut ? 0 : 1}; transition: opacity 0.1s ease;" draggable="false" />
{/await}
</div>
{:else if style === "double" && pageReady}
<div class="inspect-wrap" style="transform:scale({readerState.inspectScale}) translate({readerState.inspectPanX / readerState.inspectScale}px,{readerState.inspectPanY / readerState.inspectScale}px)">
{#if pageGroups.length}
<div class="double-wrap">
{#each currentGroup as pg, i (pg)}
{#await resolveUrl(store.pageUrls[pg - 1], 999)}
<div class="page-loader page-half {i === 0 ? 'gap-left' : 'gap-right'}" aria-hidden="true">
<svg class="panel-skeleton" viewBox="0 0 100 150" fill="none" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid meet"><rect class="ps-r ps-r1" x="2" y="2" width="62" height="88" rx="1"/><rect class="ps-r ps-r2" x="68" y="2" width="30" height="42" rx="1"/><rect class="ps-r ps-r3" x="68" y="48" width="30" height="42" rx="1"/><rect class="ps-r ps-r4" x="2" y="94" width="44" height="54" rx="1"/><rect class="ps-r ps-r5" x="50" y="94" width="48" height="54" rx="1"/></svg>
</div>
{:then src}
<img {src} alt="Page {pg}" class="{imgCls} page-half {i === 0 ? 'gap-left' : 'gap-right'}" decoding="async" draggable="false" />
{/await}
{/each}
</div>
{:else}
<div class="center-overlay">
<div class="page-loader page-loader-single" aria-hidden="true">
<svg class="panel-skeleton" viewBox="0 0 100 150" fill="none" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid meet"><rect class="ps-r ps-r1" x="2" y="2" width="62" height="88" rx="1"/><rect class="ps-r ps-r2" x="68" y="2" width="30" height="42" rx="1"/><rect class="ps-r ps-r3" x="68" y="48" width="30" height="42" rx="1"/><rect class="ps-r ps-r4" x="2" y="94" width="44" height="54" rx="1"/><rect class="ps-r ps-r5" x="50" y="94" width="48" height="54" rx="1"/></svg>
</div>
</div>
{/if}
</div>
{:else if pageReady}
<div class="inspect-wrap" style="transform:scale({readerState.inspectScale}) translate({readerState.inspectPanX / readerState.inspectScale}px,{readerState.inspectPanY / readerState.inspectScale}px)">
{#await resolveUrl(store.pageUrls[store.pageNumber - 1], 999)}
<div class="page-loader page-loader-single" aria-hidden="true">
<svg class="panel-skeleton" viewBox="0 0 100 150" fill="none" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid meet"><rect class="ps-r ps-r1" x="2" y="2" width="62" height="88" rx="1"/><rect class="ps-r ps-r2" x="68" y="2" width="30" height="42" rx="1"/><rect class="ps-r ps-r3" x="68" y="48" width="30" height="42" rx="1"/><rect class="ps-r ps-r4" x="2" y="94" width="44" height="54" rx="1"/><rect class="ps-r ps-r5" x="50" y="94" width="48" height="54" rx="1"/></svg>
</div>
{:then src}
<img {src} alt="Page {store.pageNumber}" class={imgCls} decoding="async" draggable="false" />
{/await}
</div>
{/if}
{/key}
</div>
<style>
.viewer { flex: 1; overflow-y: auto; overflow-x: hidden; display: flex; flex-direction: column; align-items: center; justify-content: center; -webkit-overflow-scrolling: touch; position: relative; touch-action: pan-x pan-y; zoom: calc(1 / var(--ui-zoom, 1)); }
.viewer.strip { justify-content: flex-start; padding: var(--sp-4) 0; }
.viewer:focus { outline: none; }
.viewer.inspect-active { cursor: grab; overflow: hidden; }
.viewer.inspect-active:active { cursor: grabbing; }
:global(.pinch-active) .viewer { touch-action: none; }
.inspect-wrap { display: flex; align-items: center; justify-content: center; transform-origin: center center; will-change: transform; }
.strip-slot {
width: 100%;
display: flex;
flex-direction: column;
align-items: center;
}
.strip-placeholder {
width: var(--effective-width, 100%);
max-width: var(--effective-width, 100%);
aspect-ratio: var(--aspect, 0.667);
border-radius: var(--radius-sm);
display: flex;
align-items: stretch;
}
.page-loader {
border-radius: var(--radius-sm);
display: flex;
align-items: stretch;
}
.page-loader-single {
width: min(100%, var(--effective-width, 100%));
max-width: var(--effective-width, 100%);
max-height: calc(var(--visual-vh, 100vh) - 80px);
aspect-ratio: 2 / 3;
}
.panel-skeleton { width: 100%; height: 100%; }
.panel-skeleton :global(.ps-r) {
stroke: var(--border-strong);
stroke-width: 0.8;
fill: none;
stroke-dasharray: 400;
stroke-dashoffset: 400;
animation: ps-shimmer 2s ease-in-out infinite;
}
.panel-skeleton :global(.ps-r1) { animation-delay: 0s; }
.panel-skeleton :global(.ps-r2) { animation-delay: 0.15s; }
.panel-skeleton :global(.ps-r3) { animation-delay: 0.3s; }
.panel-skeleton :global(.ps-r4) { animation-delay: 0.1s; }
.panel-skeleton :global(.ps-r5) { animation-delay: 0.25s; }
@keyframes ps-shimmer {
0% { stroke-dashoffset: 400; opacity: 0.25; }
40% { stroke-dashoffset: 0; opacity: 0.55; }
70% { stroke-dashoffset: 0; opacity: 0.55; }
100% { stroke-dashoffset: -400; opacity: 0.25; }
}
.img { display: block; user-select: none; image-rendering: auto; }
.img:global(.optimize-contrast) { image-rendering: -webkit-optimize-contrast; }
:global(.fit-width) { max-width: var(--effective-width, 100%); width: 100%; height: auto; }
:global(.fit-height) { max-height: calc(var(--visual-vh, 100vh) - 80px); width: auto; max-width: var(--effective-width, 100%); height: auto; }
:global(.fit-screen) { max-width: var(--effective-width, 100%); max-height: calc(var(--visual-vh, 100vh) - 80px); object-fit: contain; height: auto; }
:global(.fit-original) { max-width: 100%; width: auto; height: auto; }
:global(.strip-gap) { margin-bottom: 8px; }
.double-wrap { display: flex; align-items: flex-start; justify-content: center; max-width: calc(var(--effective-width, 100%) * 2); width: 100%; }
.page-half { flex: 1; min-width: 0; object-fit: contain; }
.gap-left { margin-right: 2px; }
.gap-right { margin-left: 2px; }
.center-overlay { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.error-msg { color: var(--color-error); font-size: var(--text-base); }
.midscroll-bar {
position: fixed;
top: 50%;
transform: translateY(-50%);
z-index: 200;
display: flex;
flex-direction: column;
align-items: center;
gap: 8px;
padding: 10px 6px;
background: color-mix(in srgb, var(--bg-raised) 92%, transparent);
border: 1px solid var(--border-base);
border-radius: 10px;
box-shadow: 0 4px 16px rgba(0,0,0,0.45);
pointer-events: auto;
backdrop-filter: blur(6px);
-webkit-backdrop-filter: blur(6px);
}
.midscroll-bar-right { right: 8px; }
.midscroll-bar-left { left: 8px; }
.midscroll-segments {
display: flex;
flex-direction: column;
align-items: center;
gap: 3px;
}
.midscroll-origin-dot {
width: 6px;
height: 6px;
border-radius: 50%;
border: 1.5px solid var(--accent-fg);
opacity: 0.6;
flex-shrink: 0;
margin: 2px 0;
}
.midscroll-seg {
width: 4px;
height: 14px;
border-radius: 2px;
background: var(--border-strong);
transition: background 0.06s ease;
flex-shrink: 0;
}
.midscroll-seg-lit {
background: var(--accent-fg);
}
.midscroll-stop {
width: 20px;
height: 20px;
display: flex;
align-items: center;
justify-content: center;
border-radius: var(--radius-sm);
border: 1px solid var(--border-dim);
background: none;
color: var(--text-faint);
cursor: pointer;
transition: color var(--t-fast), background var(--t-fast), border-color var(--t-fast);
flex-shrink: 0;
}
.midscroll-stop:hover {
color: var(--text-primary);
background: var(--bg-overlay);
border-color: var(--border-strong);
}
</style>