// ==UserScript==
// @name E-Hentai Reader Assistant
// @name:en-US EX-Hentai Reader Assistant
// @name:zh-CN EX-Hentai 助手
// @name:ja-JP EX-Hentai リーダーアシスタント
// @namespace EX-Hentai Reader Assistant
// @match https://e-hentai.org/s/*
// @match https://exhentai.org/s/*
// @grant none
// @version 1.3
// @author Assistant
// @description 🌟Add preloading to e-hentai. 🌟Add click zones (left=prev/right=next) to image sections. 🌟Load images without page reload. 🌟Support keyboard shortcuts. 🌟Support i18n.
// @description:en-US 🌟Add preloading to e-hentai. 🌟Add click zones (left=prev/right=next) to image sections. 🌟Load images without page reload. 🌟Support keyboard shortcuts. 🌟Support i18n.
// @description:zh-CN 🌟为 e 站添加预加载。🌟添加图片分区点击左边上一页,右边下一页。🌟让e站可以在不刷新的情况下加载图片。🌟支持键盘操作。🌟支持i18n。
// @description:ja-JP 🌟e-hentai にプリロードを追加。🌟画像セクションのクリックゾーン（左=前/右=次）を追加。🌟ページ遷移なしで画像を読み込む。🌟キーボード操作をサポート。🌟多言語対応。
// @run-at document-start
// @license CC-BY-NC-SA-4.0
// @noframes true
// ==/UserScript==
(function() {
'use strict';
// 配置
const CONFIG = {
preloadCount: 3, // 预加载页面数量
maxRetries: 3, // 最大重试次数
retryDelay: 100, // 重试延迟(ms)
updateUrl: false, // 是否在不刷新情况下更新地址栏
// 统一时间/延迟参数
preloadStepDelay: 120, // 预加载步进小延迟(ms)
imageTransitionMs: 210, // 图片切换过渡时长(ms)
resizeThrottleMs: 100, // 窗口重排节流(ms)
hintAutoHideMs: 5000, // 操作提示自动隐藏(ms)
hintFadeMs: 1000, // 操作提示淡出时长(ms)
errorDurationMs: 3000, // 错误提示显示时长(ms)
messageDurationMs: 2000 // 普通消息显示时长(ms)
};
// 全局变量
let currentPage = 1;
let totalPages = 1;
let imageCache = new Map(); // 图片缓存
let pageDataCache = new Map(); // 页面数据缓存
let pageUrlCache = new Map(); // 页码 -> 真实 URL（含 token）
let isLoading = false;
let fitMode = localStorage.getItem('ehx_fit_mode') || 'width'; // width | height
// 新增：预加载状态跟踪
let preloadStatus = new Map(); // 页码 -> 状态 ('waiting', 'loading', 'completed', 'failed')
let pendingPreloadRender = false; // rAF 批处理标志
let scriptEnabled = localStorage.getItem('ehx_script_enabled') !== 'false'; // 脚本开关
let showPreloadStatus = localStorage.getItem('ehx_show_preload_status') !== 'false'; // 预加载状态显示开关
let langSetting = localStorage.getItem('ehx_lang') || 'auto'; // 语言设置: auto | en | zh-CN | ja
// 许可证
const LICENSE = 'CC-BY-NC-SA-4.0';
// 国际化字典
const I18N = {
'en': {
fitWidth: 'Fit width',
fitHeight: 'Fit height',
settings: 'Settings',
loading: 'Loading...',
navHintTitle: 'Keyboard:',
navHintLeft: '← / A: Prev page',
navHintRight: '→ / D / Space: Next page',
navHintClick: 'Click image: Left=Prev, Right=Next',
menuTitle: 'E-Hentai Reader Settings',
basicSettings: 'General',
enableScript: 'Enable script',
showPreloadStatus: 'Show preload status',
updateUrl: 'Update address bar',
preloadSettings: 'Preload',
preloadCount: 'Preload pages',
maxRetries: 'Max retries',
retryDelayMs: 'Retry delay (ms)',
cacheManagement: 'Cache',
clearImageCache: 'Clear image cache',
clearPageCache: 'Clear page cache',
clearAllCache: 'Clear all cache',
resetSettings: 'Reset settings',
statusInfo: 'Status',
cacheImageCount: 'Image cache',
cachePageCount: 'Page cache',
preloadStatus: 'Preload Status',
close: 'Close',
language: 'Language',
lang_auto: 'Follow browser',
lang_en: 'English',
lang_zhCN: '简体中文',
lang_ja: '日本語',
confirmReset: 'Reset all settings?',
msgScriptEnabled: 'Enabled. Please refresh the page.',
msgScriptDisabled: 'Disabled.',
msgSettingsSaved: 'Settings saved',
msgImgCacheCleared: 'Image cache cleared',
msgPageCacheCleared: 'Page cache cleared',
msgAllCleared: 'All caches cleared',
msgSettingsReset: 'Settings reset. Please refresh the page',
loadFailed: 'Load failed, please retry',
status_waiting: 'waiting',
status_loading: 'loading',
status_completed: 'completed',
status_failed: 'failed',
status_unknown: 'unknown',
},
'zh-CN': {
fitWidth: '适应宽度',
fitHeight: '适应高度',
settings: '脚本设置',
loading: '正在加载...',
navHintTitle: '键盘操作:',
navHintLeft: '← / A: 上一页',
navHintRight: '→ / D / 空格: 下一页',
navHintClick: '点击图片左半: 上一页，右半: 下一页',
menuTitle: 'E-Hentai 助手设置',
basicSettings: '基础设置',
enableScript: '启用脚本',
showPreloadStatus: '显示预加载状态',
updateUrl: '地址栏同步',
preloadSettings: '预加载设置',
preloadCount: '预加载页数',
maxRetries: '重试次数',
retryDelayMs: '重试延迟(ms)',
cacheManagement: '缓存管理',
clearImageCache: '清除图片缓存',
clearPageCache: '清除页面缓存',
clearAllCache: '清除所有缓存',
resetSettings: '重置设置',
statusInfo: '状态信息',
cacheImageCount: '图片缓存',
cachePageCount: '页面缓存',
preloadStatus: '预加载状态',
close: '关闭',
language: '语言',
lang_auto: '自动',
lang_en: 'English',
lang_zhCN: '简体中文',
lang_ja: '日本語',
confirmReset: '确定要重置所有设置吗？',
msgScriptEnabled: '脚本已启用，请刷新页面生效',
msgScriptDisabled: '脚本已禁用',
msgSettingsSaved: '设置已保存',
msgImgCacheCleared: '图片缓存已清除',
msgPageCacheCleared: '页面缓存已清除',
msgAllCleared: '所有缓存已清除',
msgSettingsReset: '设置已重置，请刷新页面',
loadFailed: '加载失败，请重试',
status_waiting: '等待',
status_loading: '加载中',
status_completed: '完成',
status_failed: '失败',
status_unknown: '未知',
},
'ja': {
fitWidth: '幅に合わせる',
fitHeight: '高さに合わせる',
settings: '設定',
loading: '読み込み中...',
navHintTitle: 'キーボード:',
navHintLeft: '← / A: 前のページ',
navHintRight: '→ / D / Space: 次のページ',
navHintClick: '画像クリック: 左=前, 右=次',
menuTitle: 'E-Hentai リーダー設定',
basicSettings: '基本設定',
enableScript: 'スクリプトを有効',
showPreloadStatus: 'プリロード状態を表示',
updateUrl: 'アドレスバーを更新',
preloadSettings: 'プリロード',
preloadCount: 'プリロード枚数',
maxRetries: '再試行回数',
retryDelayMs: '再試行遅延(ms)',
cacheManagement: 'キャッシュ',
clearImageCache: '画像キャッシュを削除',
clearPageCache: 'ページキャッシュを削除',
clearAllCache: 'すべてのキャッシュを削除',
resetSettings: '設定をリセット',
statusInfo: 'ステータス',
cacheImageCount: '画像キャッシュ',
cachePageCount: 'ページキャッシュ',
preloadStatus: 'プリロード状態',
close: '閉じる',
language: '言語',
lang_auto: 'ブラウザに従う',
lang_en: 'English',
lang_zhCN: '简体中文',
lang_ja: '日本語',
confirmReset: 'すべての設定をリセットしますか？',
msgScriptEnabled: '有効にしました。ページを更新してください。',
msgScriptDisabled: '無効にしました。',
msgSettingsSaved: '設定を保存しました',
msgImgCacheCleared: '画像キャッシュを削除しました',
msgPageCacheCleared: 'ページキャッシュを削除しました',
msgAllCleared: 'すべてのキャッシュを削除しました',
msgSettingsReset: '設定をリセットしました。ページを更新してください',
loadFailed: '読み込みに失敗しました。再試行してください',
status_waiting: '待機',
status_loading: '読み込み中',
status_completed: '完了',
status_failed: '失敗',
status_unknown: '不明',
}
};
function resolveDefaultLang() {
const n = (navigator.language || navigator.userLanguage || 'en').toLowerCase();
if (n.startsWith('zh')) return 'zh-CN';
if (n.startsWith('ja')) return 'ja';
return 'en';
}
function getCurrentLang() {
return langSetting === 'auto' ? resolveDefaultLang() : langSetting;
}
function t(key) {
const lang = getCurrentLang();
const dict = I18N[lang] || I18N['en'];
return (dict && dict[key]) || I18N['en'][key] || key;
}
// 保持 document-start，但不在此阶段阻断事件，避免干扰后续绑定
// 初始化
function init() {
// 添加样式（总是需要，包括菜单样式）
addStyles();
// 添加管理菜单
addControlMenu();
// 如果脚本被禁用，只显示菜单，不执行主要功能
if (!scriptEnabled) {
console.log('脚本已禁用，仅显示控制菜单');
return;
}
// 解析当前页面信息
parseCurrentPage();
// 用当前 DOM 为当前页建立初始化数据（含 next/prev 实时 URL）
seedCurrentPageData();
// 绑定事件
bindEvents();
// 开始预加载
startPreloading();
// 添加加载指示器
addLoadingIndicator();
// 添加预加载状态显示
if (showPreloadStatus) {
addPreloadStatusDisplay();
}
}
// 解析当前页面信息
function parseCurrentPage() {
const url = window.location.href;
const match = url.match(/\/s\/([^\/]+)\/(\d+)-(\d+)/);
if (match) {
currentPage = parseInt(match[3]);
}
// 从 DOM 解析当前/总页
const spans = document.querySelectorAll('.sn span');
if (spans && spans.length >= 2) {
const cur = parseInt(spans[0].textContent.trim());
const tot = parseInt(spans[1].textContent.trim());
if (!Number.isNaN(cur)) currentPage = cur;
if (!Number.isNaN(tot)) totalPages = tot;
}
// 建立 URL 映射
pageUrlCache.set(currentPage, window.location.href);
const nextA = document.getElementById('next');
const prevA = document.getElementById('prev');
if (nextA && nextA.href) pageUrlCache.set(currentPage + 1, nextA.href);
if (prevA && prevA.href) pageUrlCache.set(currentPage - 1, prevA.href);
console.log(`当前页: ${currentPage}/${totalPages}`);
}
// 用当前 DOM 初始化当前页数据，确保实时 next/prev
function seedCurrentPageData() {
const img = document.getElementById('img');
if (!img) return;
const nextA = document.getElementById('next');
const prevA = document.getElementById('prev');
const imageData = {
src: img.src,
width: img.style.width,
height: img.style.height,
pageNum: currentPage,
nextUrl: nextA && nextA.href ? nextA.href : undefined,
prevUrl: prevA && prevA.href ? prevA.href : undefined,
};
pageDataCache.set(currentPage, imageData);
if (imageData.nextUrl) pageUrlCache.set(currentPage + 1, imageData.nextUrl);
if (imageData.prevUrl) pageUrlCache.set(currentPage - 1, imageData.prevUrl);
}
// 绑定事件
function bindEvents() {
const img = document.getElementById('img');
const imgContainer = document.getElementById('i3');
if (img && imgContainer) {
// 用中性容器替换外层 <a>，彻底打断默认跳转与站内 onclick
const link = imgContainer.querySelector('a');
if (link && link.contains(img)) {
const holder = document.createElement('div');
holder.id = 'img-holder';
holder.style.cursor = 'pointer';
holder.style.display = 'inline-block';
link.parentNode.replaceChild(holder, link);
holder.appendChild(img);
// 添加局部加载层
const loader = document.createElement('div');
loader.className = 'eh-img-loader';
loader.innerHTML = '<div class="eh-spinner"></div>';
holder.appendChild(loader);
holder.addEventListener('click', function(e) {
e.preventDefault();
e.stopPropagation();
const rect = holder.getBoundingClientRect();
const x = e.clientX - rect.left;
if (x < rect.width / 2) {
goToPrevPage();
} else {
goToNextPage();
}
}, { capture: true });
}
}
// 在冒泡阶段拦截，并作为后备触发我们的逻辑
document.addEventListener('click', function(e) {
const target = e.target;
if (!target) return;
const inNext = target.closest('a#next');
const inPrev = target.closest('a#prev');
const inImgArea = target.closest('#i3');
if (inNext) {
e.preventDefault();
e.stopPropagation();
goToNextPage();
return;
}
if (inPrev) {
e.preventDefault();
e.stopPropagation();
goToPrevPage();
return;
}
if (inImgArea) {
e.preventDefault();
e.stopPropagation();
const rect = inImgArea.getBoundingClientRect();
const x = e.clientX - rect.left;
if (x < rect.width / 2) {
goToPrevPage();
} else {
goToNextPage();
}
return;
}
}, false);
// 绑定导航按钮
bindNavigationButtons();
// 绑定键盘事件（捕获阶段，阻止站点快捷键）
document.addEventListener('keydown', handleKeyboard, true);
}
// 绑定导航按钮
function bindNavigationButtons() {
const prevBtn = document.getElementById('prev');
const nextBtn = document.getElementById('next');
if (prevBtn) {
// 不再覆盖 href，保留真实链接，仅拦截点击
prevBtn.addEventListener('click', function(e) {
e.preventDefault();
e.stopPropagation();
goToPrevPage();
}, { capture: true });
}
if (nextBtn) {
// 不再覆盖 href，保留真实链接，仅拦截点击
nextBtn.addEventListener('click', function(e) {
e.preventDefault();
e.stopPropagation();
goToNextPage();
}, { capture: true });
}
}
// 键盘事件处理
function handleKeyboard(e) {
// 阻断站点注册的快捷键
const code = e.code || e.key;
if (!code) return;
// 忽略按住不放产生的重复事件，避免一次按键翻多页
if (e.repeat) {
e.preventDefault();
e.stopPropagation();
return;
}
if (isLoading) {
e.preventDefault();
e.stopPropagation();
return;
}
if (code === 'ArrowLeft' || code === 'KeyA') {
e.preventDefault();
e.stopPropagation();
goToPrevPage();
} else if (code === 'ArrowRight' || code === 'KeyD' || code === 'Space') {
e.preventDefault();
e.stopPropagation();
goToNextPage();
}
}
// 跳转到下一页（优先使用当前页解析得到的 next 实时链接）
async function goToNextPage() {
if (isLoading || currentPage >= totalPages) return;
setLoading(true);
try {
let nextPage = currentPage + 1;
const curData = pageDataCache.get(currentPage);
if (curData && curData.nextUrl) {
const p = extractPageNum(curData.nextUrl);
if (Number.isFinite(p)) nextPage = p;
pageUrlCache.set(nextPage, curData.nextUrl);
}
const imageData = await getPageImage(nextPage);
if (imageData) {
updateImage(imageData);
currentPage = nextPage;
updatePageInfo();
updateNavigationButtons();
// 继续预加载
preloadPages();
// 更新状态显示
updatePreloadStatusDisplay();
}
} catch (error) {
console.error('加载下一页失败:', error);
showError(t('loadFailed'));
} finally {
setLoading(false);
}
}
// 跳转到上一页（优先使用当前页解析得到的 prev 实时链接）
async function goToPrevPage() {
if (isLoading || currentPage <= 1) return;
setLoading(true);
try {
let prevPage = currentPage - 1;
const curData = pageDataCache.get(currentPage);
if (curData && curData.prevUrl) {
const p = extractPageNum(curData.prevUrl);
if (Number.isFinite(p)) prevPage = p;
pageUrlCache.set(prevPage, curData.prevUrl);
}
const imageData = await getPageImage(prevPage);
if (imageData) {
updateImage(imageData);
currentPage = prevPage;
updatePageInfo();
updateNavigationButtons();
// 继续预加载（向前翻页后同样触发）
preloadPages();
// 更新状态显示
updatePreloadStatusDisplay();
}
} catch (error) {
console.error('加载上一页失败:', error);
showError(t('loadFailed'));
} finally {
setLoading(false);
}
}
// 获取指定页面的图片信息
async function getPageImage(pageNum, retryCount = 0) {
if (pageDataCache.has(pageNum)) {
// 如果已缓存，更新状态为完成
updatePreloadStatus(pageNum, 'completed');
return pageDataCache.get(pageNum);
}
// 设置状态为加载中
updatePreloadStatus(pageNum, 'loading');
try {
const url = getPageUrl(pageNum);
const response = await fetch(url);
if (!response.ok) {
throw new Error(`HTTP ${response.status}`);
}
const html = await response.text();
const parser = new DOMParser();
const doc = parser.parseFromString(html, 'text/html');
const img = doc.getElementById('img');
if (!img) {
throw new Error('未找到图片元素');
}
let imageData = {
src: img.src,
width: img.style.width,
height: img.style.height,
pageNum: pageNum
};
// 完善 URL 映射与总页数，并记录当前页的 prev/next 实时链接
try {
const nextA2 = doc.getElementById('next');
const prevA2 = doc.getElementById('prev');
if (nextA2 && nextA2.href) {
pageUrlCache.set(pageNum + 1, nextA2.href);
imageData.nextUrl = nextA2.href;
}
if (prevA2 && prevA2.href) {
pageUrlCache.set(pageNum - 1, prevA2.href);
imageData.prevUrl = prevA2.href;
}
const spans2 = doc.querySelectorAll('.sn span');
if (spans2.length >= 2) {
const tot2 = parseInt(spans2[1].textContent.trim());
if (!Number.isNaN(tot2) && tot2 > totalPages) {
totalPages = tot2;
// 实时更新页面显示
setTimeout(updatePageInfo, 0);
}
}
} catch (_) {}
// 缓存数据
pageDataCache.set(pageNum, imageData);
// 预加载图片
preloadImage(imageData.src);
// 更新状态为完成
updatePreloadStatus(pageNum, 'completed');
return imageData;
} catch (error) {
console.error(`获取页面 ${pageNum} 失败:`, error);
if (retryCount < CONFIG.maxRetries) {
console.log(`重试获取页面 ${pageNum} (${retryCount + 1}/${CONFIG.maxRetries})`);
await new Promise(resolve => setTimeout(resolve, CONFIG.retryDelay));
return getPageImage(pageNum, retryCount + 1);
}
// 更新状态为失败
updatePreloadStatus(pageNum, 'failed');
throw error;
}
}
// 预加载图片
function preloadImage(src) {
if (imageCache.has(src)) return;
const img = new Image();
img.onload = () => {
imageCache.set(src, img);
console.log('图片预加载完成:', src);
};
img.onerror = () => {
console.error('图片预加载失败:', src);
};
img.src = src;
}
// 获取页面URL
function getPageUrl(pageNum) {
if (pageUrlCache.has(pageNum)) return pageUrlCache.get(pageNum);
// 临近页尝试使用 DOM 中的真实链接
if (pageNum === currentPage + 1) {
const nextA = document.getElementById('next');
if (nextA && nextA.href) {
pageUrlCache.set(pageNum, nextA.href);
return nextA.href;
}
}
if (pageNum === currentPage - 1) {
const prevA = document.getElementById('prev');
if (prevA && prevA.href) {
pageUrlCache.set(pageNum, prevA.href);
return prevA.href;
}
}
// 回退：基于当前 URL 猜测（可能无效）
const m = window.location.href.match(/^(.*-)(\d+)([^\d]*)$/);
if (m) {
const guess = `${m[1]}${pageNum}${m[3] || ''}`;
return guess;
}
return window.location.href;
}
// 辅助：从链接中提取页码
function extractPageNum(url) {
const m = url && url.match(/\/s\/[^\/]+\/(\d+)-(\d+)/);
if (m) return parseInt(m[2]);
const m2 = url && url.match(/-(\d+)(?:[^\d]*)$/);
return m2 ? parseInt(m2[1]) : NaN;
}
// 更新图片
function updateImage(imageData) {
const img = document.getElementById('img');
if (img) {
// 过渡开始：隐藏旧图，显示局部加载动画
beginImageTransition();
const applyNewSrc = () => {
img.src = imageData.src;
// 让 CSS 接管尺寸控制，避免因不同页的 inline 宽高导致布局跳变
img.style.width = '';
img.style.height = '';
// 新图加载完成后淡入
if (img.complete) {
endImageTransition();
} else {
img.onload = () => endImageTransition();
img.onerror = () => endImageTransition(true);
}
// 更新图片信息
updateImageInfo(imageData);
};
// 若已预加载，直接应用
if (imageCache.has(imageData.src)) {
const preImg = imageCache.get(imageData.src);
if (preImg && preImg.complete) {
applyNewSrc();
} else {
// 保险：等待预加载完成再应用
preImg.onload = () => applyNewSrc();
preImg.onerror = () => applyNewSrc();
}
} else {
applyNewSrc();
}
}
}
// 更新图片信息
function updateImageInfo(imageData) {
const infoElements = document.querySelectorAll('#i2 > div:last-child, #i4 > div:first-child');
// 从图片URL提取文件名和尺寸信息
const urlParts = imageData.src.split('/');
const filename = urlParts[urlParts.length - 1].split('?')[0];
infoElements.forEach(element => {
if (element.textContent.includes('::')) {
// 保持原有格式，只更新文件名
const parts = element.textContent.split('::');
if (parts.length >= 2) {
element.textContent = `${filename} :: ${parts[1].trim()} :: ${parts[2] ? parts[2].trim() : ''}`;
}
}
});
}
// 更新页面信息
function updatePageInfo() {
// 更新原页面的所有页码显示（顶部和底部）
const pageSpans = document.querySelectorAll('.sn span');
for (let i = 0; i < pageSpans.length; i += 2) {
if (pageSpans[i]) {
pageSpans[i].textContent = currentPage;
}
if (pageSpans[i + 1] && totalPages) {
pageSpans[i + 1].textContent = totalPages;
}
}
// 更新自定义工具条的页码显示
const cur = document.getElementById('ehx-cur');
const tot = document.getElementById('ehx-total');
if (cur) cur.textContent = currentPage;
if (tot && totalPages) tot.textContent = totalPages;
// 是否更新浏览器地址栏（不刷新页面）
if (CONFIG.updateUrl) {
const newUrl = pageUrlCache.get(currentPage) || getPageUrl(currentPage);
window.history.replaceState(null, '', newUrl);
}
}
// 更新导航按钮状态
function updateNavigationButtons() {
// 更新原页面的导航按钮
const prevBtn = document.getElementById('prev');
const nextBtn = document.getElementById('next');
if (prevBtn) {
if (currentPage <= 1) {
prevBtn.style.opacity = '0.5';
prevBtn.style.cursor = 'not-allowed';
} else {
prevBtn.style.opacity = '1';
prevBtn.style.cursor = 'pointer';
}
}
if (nextBtn) {
if (currentPage >= totalPages) {
nextBtn.style.opacity = '0.5';
nextBtn.style.cursor = 'not-allowed';
} else {
nextBtn.style.opacity = '1';
nextBtn.style.cursor = 'pointer';
}
}
}
// 开始预加载
function startPreloading() {
preloadPages();
}
// 预加载页面
async function preloadPages() {
// 顺序向前预加载，以确保 token 链正确
for (let step = 1; step <= CONFIG.preloadCount; step++) {
const p = currentPage + step;
if (p > totalPages) break;
if (pageDataCache.has(p)) continue;
// 设置等待状态
updatePreloadStatus(p, 'waiting');
try {
// 小延迟避免阻塞
// eslint-disable-next-line no-await-in-loop
await new Promise(r => setTimeout(r, CONFIG.preloadStepDelay));
// eslint-disable-next-line no-await-in-loop
await getPageImage(p);
} catch (e) {
console.log(`预加载页面 ${p} 失败:`, e && e.message ? e.message : e);
updatePreloadStatus(p, 'failed');
break;
}
}
// 回看一页
const back = currentPage - 1;
if (back >= 1 && !pageDataCache.has(back)) {
updatePreloadStatus(back, 'waiting');
getPageImage(back).catch(() => {
updatePreloadStatus(back, 'failed');
});
}
}
// 设置加载状态
function setLoading(loading) {
isLoading = loading;
const indicator = document.getElementById('loading-indicator');
if (indicator) {
indicator.style.display = loading ? 'block' : 'none';
}
// 禁用/启用导航按钮
const buttons = document.querySelectorAll('#prev, #next');
buttons.forEach(btn => {
if (loading) {
btn.style.pointerEvents = 'none';
btn.style.opacity = '0.5';
} else {
btn.style.pointerEvents = 'auto';
updateNavigationButtons();
}
});
}
// 开始图片切换的过渡，显示局部 loading
function beginImageTransition() {
const img = document.getElementById('img');
if (!img) return;
const holder = document.getElementById('img-holder');
const isHeightMode = document.body.classList.contains('ehx-fit-height');
if (holder && !isHeightMode) {
// 只在宽度模式下固定高度，避免切换瞬间塌陷/跳变
const rect = holder.getBoundingClientRect();
holder.style.height = rect.height + 'px';
}
img.style.opacity = '0';
if (holder) holder.classList.add('loading');
// 预留图片信息区域高度，避免下方元素跳动
reserveInfoAreas();
}
// 结束图片切换的过渡，隐藏局部 loading
function endImageTransition(isError = false) {
const img = document.getElementById('img');
if (!img) return;
const holder = document.getElementById('img-holder');
const isHeightMode = document.body.classList.contains('ehx-fit-height');
// 根据新图自然高度更新容器高度，再释放
if (holder) {
const release = () => {
requestAnimationFrame(() => {
if (!isHeightMode) {
holder.style.height = '';
}
holder.classList.remove('loading');
// 延后释放信息区域的 min-height，避免移动端闪烁
setTimeout(releaseInfoAreas, 0);
});
};
if (!isHeightMode) {
// 只在宽度模式下做高度过渡
const tmpImg = imageCache.get(img.src) || img;
const naturalH = tmpImg.naturalHeight && tmpImg.naturalWidth ? (holder.clientWidth * tmpImg.naturalHeight / tmpImg.naturalWidth) : holder.clientHeight;
if (naturalH && Number.isFinite(naturalH)) {
holder.style.height = Math.round(naturalH) + 'px';
setTimeout(release, CONFIG.imageTransitionMs);
} else {
release();
}
} else {
// 高度模式下直接释放
release();
}
}
img.style.opacity = '1';
}
// 预留信息区域高度
function reserveInfoAreas() {
const infoTop = document.querySelector('#i2 > div:last-child');
const infoBottom = document.querySelector('#i4 > div:first-child');
freezeElementHeight(infoTop);
freezeElementHeight(infoBottom);
}
// 释放信息区域高度
function releaseInfoAreas() {
const infoTop = document.querySelector('#i2 > div:last-child');
const infoBottom = document.querySelector('#i4 > div:first-child');
releaseElementHeight(infoTop);
releaseElementHeight(infoBottom);
}
// 冻结元素高度
function freezeElementHeight(el) {
if (!el) return;
const rect = el.getBoundingClientRect();
const h = Math.round(rect.height);
if (h > 0) {
// 仅设置最小高度，避免强制 height/overflow 造成移动端重绘闪烁
el.style.minHeight = h + 'px';
}
}
// 释放元素高度
function releaseElementHeight(el) {
if (!el) return;
el.style.minHeight = '';
}
// 显示错误信息
function showError(message) {
const errorDiv = document.createElement('div');
errorDiv.id = 'error-message';
errorDiv.textContent = message;
errorDiv.className = 'stuffbox';
errorDiv.style.cssText = `
position: fixed;
top: 20px;
right: 20px;
padding: 10px 15px;
z-index: 10000;
font-size: 14px;
`;
document.body.appendChild(errorDiv);
setTimeout(() => {
if (errorDiv.parentNode) {
errorDiv.parentNode.removeChild(errorDiv);
}
}, CONFIG.errorDurationMs);
}
// 添加样式（移除自定义配色与文字色，改为继承站点样式）
function addStyles() {
const style = document.createElement('style');
style.textContent = `
/* 页面框架：仅结构与布局，颜色继承站点 */
.ehx-reader-bar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 6px 8px; backdrop-filter: saturate(120%) blur(3px); }
.ehx-reader-bar .group { display: inline-flex; align-items: center; gap: 6px; }
.ehx-btn { appearance: none; border: 1px solid currentColor; background: transparent; color: inherit; padding: 6px 10px; border-radius: 6px; cursor: pointer; }
.ehx-btn:disabled { opacity: .5; cursor: not-allowed; }
.ehx-btn:hover { filter: brightness(1.02); }
.ehx-btn.active { outline: 2px solid currentColor; }
.ehx-sep { width: 1px; height: 24px; background: currentColor; opacity: .2; }
.ehx-counter { user-select: none; min-width: 84px; text-align: center; }
/* 主容器：跟随窗口宽度居中 */
.ehx-container { margin: 0 auto; padding: 6px 10px; max-width: min(96vw, 1200px); }
.ehx-image-wrap { display: flex; justify-content: center; align-items: flex-start; }
/* 适应高度模式：整个显示区域适应浏览器视口 */
body.ehx-fit-height .ehx-container { height: var(--ehx-available-height, 400px); display: flex; flex-direction: column; }
body.ehx-fit-height .ehx-image-wrap { flex: 1; align-items: center; min-height: 0; }
body.ehx-fit-height #img-holder { height: 100%; max-height: 100%; width: auto; display: flex; align-items: center; justify-content: center; }
body.ehx-fit-height #img { max-height: 100%; max-width: 100%; width: auto; height: auto; object-fit: contain; }
#loading-indicator {
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
padding: 15px 25px;
z-index: 10000;
font-size: 16px;
display: none;
}
.eh-nav-hint {
position: fixed;
bottom: 20px;
right: 20px;
padding: 10px;
font-size: 12px;
z-index: 9999;
}
#img { transition: opacity 0.18s ease; max-width: 100%; height: auto; display: block; }
.loading #img { opacity: 0.7; }
/* 局部加载遮罩 */
#img-holder { position: relative; display: inline-block; max-width: 100%; }
#img-holder .eh-img-loader { position: absolute; inset: 0; display: none; align-items: center; justify-content: center; }
#img-holder.loading .eh-img-loader { display: flex; }
.eh-spinner { width: 32px; height: 32px; border-radius: 50%; border: 3px solid currentColor; border-top-color: transparent; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
/* 容器自适应与高度平滑过渡，减少抖动 */
#i3 { display: flex; justify-content: center; }
#img-holder { transition: height 0.2s ease; }
body.ehx-fit-height #img-holder { transition: none; }
/* 控制菜单样式（定位 + 结构，外观由站点类接管） */
.ehx-control-menu { position: fixed; top: 10px; right: 10px; padding: 12px; z-index: 10001; font-size: 12px; min-width: 280px; display: none; }
.ehx-control-menu.show { display: block; }
.ehx-menu-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid currentColor; font-weight: bold; }
.ehx-menu-close { background: none; border: none; font-size: 16px; cursor: pointer; padding: 0; width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; }
.ehx-menu-section { margin-bottom: 12px; }
.ehx-menu-section h4 { margin: 0 0 6px 0; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
.ehx-menu-item { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; padding: 4px 0; }
.ehx-menu-item label { font-size: 11px; cursor: pointer; }
.ehx-toggle { position: relative; width: 40px; height: 20px; border: 1px solid currentColor; border-radius: 10px; cursor: pointer; }
.ehx-toggle::after { content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; background: currentColor; border-radius: 50%; transition: transform 0.3s; }
.ehx-toggle.active::after { transform: translateX(20px); }
.ehx-menu-input { padding: 4px 6px; border: 1px solid currentColor; border-radius: 4px; font-size: 11px; width: 120px; min-height: 26px; text-align: center; text-align-last: center; background: transparent; color: inherit; }
.ehx-menu-btn { padding: 6px 12px; border: 1px solid currentColor; border-radius: 4px; cursor: pointer; font-size: 11px; margin: 2px; background: transparent; color: inherit; }
/* 预加载状态显示（外观交给站点类） */
.ehx-preload-status { position: fixed; bottom: 10px; left: 10px; padding: 10px; z-index: 10001; font-size: 11px; max-width: 300px; max-height: 200px; overflow: hidden; display: none; }
.ehx-preload-status.show { display: block; }
.ehx-status-header { font-weight: bold; margin-bottom: 8px; text-align: center; padding-bottom: 4px; border-bottom: 1px solid currentColor; }
.ehx-status-list { max-height: 160px; overflow-y: auto; padding-right: 4px; scrollbar-width: thin; }
.ehx-status-item { display: flex; justify-content: space-between; align-items: center; padding: 2px 0; border-bottom: 1px solid currentColor; opacity: .6; }
.ehx-status-item:last-child { border-bottom: none; }
.ehx-status-page { font-weight: bold; }
.ehx-status-state { font-size: 10px; font-weight: bold; text-transform: uppercase; }
`;
document.head.appendChild(style);
}
// 添加加载指示器
function addLoadingIndicator() {
// 顶部工具条（简洁，参考结构但不抄配色）
const topBar = document.createElement('div');
topBar.className = 'ehx-reader-bar stuffbox';
topBar.innerHTML = `
<div class="group">
<span class="ehx-counter"><span id="ehx-cur">${currentPage}</span> / <span id="ehx-total">${totalPages}</span></span>
</div>
<div class="group">
<button class="ehx-btn" id="ehx-fit-width">${t('fitWidth')}</button>
<button class="ehx-btn" id="ehx-fit-height">${t('fitHeight')}</button>
<button class="ehx-btn" id="ehx-menu-open" title="${t('settings')}">⚙️</button>
</div>
`;
document.body.insertBefore(topBar, document.body.firstChild);
// 容器包裹（居中与内边距）
const container = document.createElement('div');
container.className = 'ehx-container';
const i3 = document.getElementById('i3');
if (i3 && i3.parentNode) {
i3.parentNode.insertBefore(container, i3);
container.appendChild(i3);
i3.classList.add('ehx-image-wrap');
}
// 全局加载指示器
const indicator = document.createElement('div');
indicator.id = 'loading-indicator';
indicator.className = 'stuffbox';
indicator.textContent = t('loading');
document.body.appendChild(indicator);
// 图像局部加载容器
const img = document.getElementById('img');
const imgContainer = document.getElementById('i3');
if (img && imgContainer) {
// 若尚未包裹，建立 holder
let holder = document.getElementById('img-holder');
if (!holder) {
holder = document.createElement('div');
holder.id = 'img-holder';
holder.style.display = 'inline-block';
img.parentNode.insertBefore(holder, img);
holder.appendChild(img);
const loader = document.createElement('div');
loader.className = 'eh-img-loader';
loader.innerHTML = '<div class="eh-spinner"></div>';
holder.appendChild(loader);
}
}
// 添加操作提示
const hint = document.createElement('div');
hint.className = 'eh-nav-hint stuffbox';
hint.innerHTML = `
<div>${t('navHintTitle')}</div>
<div>${t('navHintLeft')}</div>
<div>${t('navHintRight')}</div>
<div>${t('navHintClick')}</div>
`;
document.body.appendChild(hint);
// N 秒后隐藏提示
setTimeout(() => {
hint.style.transition = 'opacity 1s ease';
hint.style.opacity = '0';
setTimeout(() => {
if (hint.parentNode) {
hint.parentNode.removeChild(hint);
}
}, CONFIG.hintFadeMs);
}, CONFIG.hintAutoHideMs);
// 工具条事件
const btnFitW = document.getElementById('ehx-fit-width');
const btnFitH = document.getElementById('ehx-fit-height');
const btnMenu = document.getElementById('ehx-menu-open');
if (btnFitW) btnFitW.onclick = () => setFitMode('width');
if (btnFitH) btnFitH.onclick = () => setFitMode('height');
if (btnMenu) btnMenu.onclick = (e) => {
e.preventDefault();
e.stopPropagation();
const menu = document.querySelector('.ehx-control-menu');
if (menu) {
const willShow = !menu.classList.contains('show');
menu.classList.toggle('show');
if (willShow) updateMenuInfo();
}
};
// 初始应用适配模式
applyFitMode();
updateFitModeButtons();
}
// 页面加载完成后初始化
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', init);
} else {
init();
}
// 适应模式
function setFitMode(mode) {
fitMode = mode === 'height' ? 'height' : 'width';
localStorage.setItem('ehx_fit_mode', fitMode);
applyFitMode();
updateFitModeButtons();
}
function updateFitModeButtons() {
const btnFitW = document.getElementById('ehx-fit-width');
const btnFitH = document.getElementById('ehx-fit-height');
if (btnFitW && btnFitH) {
btnFitW.classList.toggle('active', fitMode === 'width');
btnFitH.classList.toggle('active', fitMode === 'height');
}
}
function applyFitMode() {
const holder = document.getElementById('img-holder');
const img = document.getElementById('img');
if (!holder || !img) return;
if (fitMode === 'height') {
// 高度适应模式：让整个容器适应浏览器高度
document.body.classList.add('ehx-fit-height');
const topBar = document.querySelector('.ehx-reader-bar');
const topH = topBar ? topBar.getBoundingClientRect().height : 0;
const avail = Math.max(300, window.innerHeight - topH - 12);
document.documentElement.style.setProperty('--ehx-available-height', avail + 'px');
// 清除宽度模式的内联样式
holder.style.maxHeight = '';
holder.style.width = '';
holder.style.height = '';
img.style.maxWidth = '';
img.style.maxHeight = '';
} else {
// 宽度适应模式：图片宽度撑满容器
document.body.classList.remove('ehx-fit-height');
document.documentElement.style.removeProperty('--ehx-available-height');
// 设置宽度模式样式
holder.style.maxHeight = '';
holder.style.width = '100%';
holder.style.height = '';
img.style.maxWidth = '100%';
img.style.maxHeight = 'none';
}
}
// 窗口尺寸变化节流，减少高频调用导致的抖动
let resizeThrottleId = null;
window.addEventListener('resize', () => {
if (resizeThrottleId) clearTimeout(resizeThrottleId);
resizeThrottleId = setTimeout(() => {
resizeThrottleId = null;
applyFitMode();
}, CONFIG.resizeThrottleMs);
});
// ==================== 新增功能：控制菜单和预加载状态 ====================
// 添加控制菜单
function addControlMenu() {
// 控制菜单（移除悬浮触发按钮，改由工具条按钮控制）
const menu = document.createElement('div');
menu.className = 'ehx-control-menu stuffbox';
menu.innerHTML = `
<div class="ehx-menu-header">
<span>${t('menuTitle')}</span>
<button class="ehx-menu-close" title="${t('close')}">×</button>
</div>
<div class="ehx-menu-section">
<h4>${t('basicSettings')}</h4>
<div class="ehx-menu-item">
<label>${t('enableScript')}</label>
<div class="ehx-toggle ${scriptEnabled ? 'active' : ''}" data-setting="script-enabled"></div>
</div>
<div class="ehx-menu-item">
<label>${t('showPreloadStatus')}</label>
<div class="ehx-toggle ${showPreloadStatus ? 'active' : ''}" data-setting="show-preload-status"></div>
</div>
<div class="ehx-menu-item">
<label>${t('updateUrl')}</label>
<div class="ehx-toggle ${CONFIG.updateUrl ? 'active' : ''}" data-setting="update-url"></div>
</div>
<div class="ehx-menu-item">
<label>${t('language')}</label>
<select class="ehx-menu-input" data-setting="lang">
<option value="auto" ${langSetting==='auto' ? 'selected' : ''}>${t('lang_auto')}</option>
<option value="en" ${getCurrentLang()==='en' && langSetting!=='auto' ? 'selected' : ''}>${t('lang_en')}</option>
<option value="zh-CN" ${getCurrentLang()==='zh-CN' && langSetting!=='auto' ? 'selected' : ''}>${t('lang_zhCN')}</option>
<option value="ja" ${getCurrentLang()==='ja' && langSetting!=='auto' ? 'selected' : ''}>${t('lang_ja')}</option>
</select>
</div>
</div>
<div class="ehx-menu-section">
<h4>${t('preloadSettings')}</h4>
<div class="ehx-menu-item">
<label>${t('preloadCount')}</label>
<input type="number" class="ehx-menu-input" min="1" max="10" value="${CONFIG.preloadCount}" data-setting="preload-count">
</div>
<div class="ehx-menu-item">
<label>${t('maxRetries')}</label>
<input type="number" class="ehx-menu-input" min="1" max="10" value="${CONFIG.maxRetries}" data-setting="max-retries">
</div>
<div class="ehx-menu-item">
<label>${t('retryDelayMs')}</label>
<input type="number" class="ehx-menu-input" min="500" max="5000" step="500" value="${CONFIG.retryDelay}" data-setting="retry-delay">
</div>
</div>
<div class="ehx-menu-section">
<h4>${t('cacheManagement')}</h4>
<div style="display: flex; flex-wrap: wrap; gap: 4px;">
<button class="ehx-menu-btn" data-action="clear-cache">${t('clearImageCache')}</button>
<button class="ehx-menu-btn" data-action="clear-page-cache">${t('clearPageCache')}</button>
<button class="ehx-menu-btn" data-action="clear-all-cache">${t('clearAllCache')}</button>
<button class="ehx-menu-btn" data-action="reset-settings">${t('resetSettings')}</button>
</div>
</div>
<div class="ehx-menu-section">
<h4>${t('statusInfo')}</h4>
<div style="font-size: 10px; line-height: 1.4;">
<div>${t('cacheImageCount')}: <span id="ehx-cache-count">${imageCache.size}</span></div>
<div>${t('cachePageCount')}: <span id="ehx-page-cache-count">${pageDataCache.size}</span></div>
<div>${t('preloadStatus')}: <span id="ehx-preload-count">${preloadStatus.size}</span></div>
</div>
</div>
`;
document.body.appendChild(menu);
menu.querySelector('.ehx-menu-close').addEventListener('click', () => {
menu.classList.remove('show');
});
// 点击菜单外部关闭
document.addEventListener('click', (e) => {
if (!menu.contains(e.target)) {
menu.classList.remove('show');
}
});
// 绑定设置控制事件
bindMenuControls(menu);
}
// 绑定菜单控制事件
function bindMenuControls(menu) {
// 开关控制
menu.querySelectorAll('.ehx-toggle').forEach(toggle => {
toggle.addEventListener('click', () => {
const setting = toggle.dataset.setting;
const isActive = toggle.classList.contains('active');
toggle.classList.toggle('active');
switch(setting) {
case 'script-enabled':
scriptEnabled = !isActive;
localStorage.setItem('ehx_script_enabled', scriptEnabled);
showMessage(scriptEnabled ? t('msgScriptEnabled') : t('msgScriptDisabled'));
break;
case 'show-preload-status':
showPreloadStatus = !isActive;
localStorage.setItem('ehx_show_preload_status', showPreloadStatus);
if (showPreloadStatus) {
addPreloadStatusDisplay();
} else {
const statusDisplay = document.querySelector('.ehx-preload-status');
if (statusDisplay) statusDisplay.remove();
}
break;
case 'update-url':
CONFIG.updateUrl = !isActive;
localStorage.setItem('ehx_update_url', CONFIG.updateUrl);
break;
}
});
});
// 输入框控制
menu.querySelectorAll('.ehx-menu-input').forEach(input => {
input.addEventListener('change', () => {
const setting = input.dataset.setting;
const value = setting === 'lang' ? String(input.value) : (parseInt(input.value) || 1);
switch(setting) {
case 'preload-count':
CONFIG.preloadCount = Math.max(1, Math.min(10, value));
localStorage.setItem('ehx_preload_count', CONFIG.preloadCount);
input.value = CONFIG.preloadCount;
break;
case 'max-retries':
CONFIG.maxRetries = Math.max(1, Math.min(10, value));
localStorage.setItem('ehx_max_retries', CONFIG.maxRetries);
input.value = CONFIG.maxRetries;
break;
case 'retry-delay':
CONFIG.retryDelay = Math.max(500, Math.min(5000, value));
localStorage.setItem('ehx_retry_delay', CONFIG.retryDelay);
input.value = CONFIG.retryDelay;
break;
case 'lang':
langSetting = value;
localStorage.setItem('ehx_lang', langSetting);
showMessage(t('msgSettingsSaved'));
applyLanguage();
return;
}
showMessage(t('msgSettingsSaved'));
});
});
// 按钮控制
menu.querySelectorAll('.ehx-menu-btn').forEach(btn => {
btn.addEventListener('click', () => {
const action = btn.dataset.action;
switch(action) {
case 'clear-cache':
imageCache.clear();
showMessage(t('msgImgCacheCleared'));
break;
case 'clear-page-cache':
pageDataCache.clear();
showMessage(t('msgPageCacheCleared'));
break;
case 'clear-all-cache':
imageCache.clear();
pageDataCache.clear();
pageUrlCache.clear();
preloadStatus.clear();
showMessage(t('msgAllCleared'));
updatePreloadStatusDisplay();
break;
case 'reset-settings':
if (confirm(t('confirmReset'))) {
localStorage.removeItem('ehx_script_enabled');
localStorage.removeItem('ehx_show_preload_status');
localStorage.removeItem('ehx_fit_mode');
localStorage.removeItem('ehx_update_url');
localStorage.removeItem('ehx_preload_count');
localStorage.removeItem('ehx_max_retries');
localStorage.removeItem('ehx_retry_delay');
localStorage.removeItem('ehx_lang');
showMessage(t('msgSettingsReset'));
}
break;
}
updateMenuInfo();
});
});
}
// 更新菜单信息
function updateMenuInfo() {
const cacheCount = document.getElementById('ehx-cache-count');
const pageCacheCount = document.getElementById('ehx-page-cache-count');
const preloadCount = document.getElementById('ehx-preload-count');
if (cacheCount) cacheCount.textContent = imageCache.size;
if (pageCacheCount) pageCacheCount.textContent = pageDataCache.size;
if (preloadCount) preloadCount.textContent = preloadStatus.size;
}
// 添加预加载状态显示
function addPreloadStatusDisplay() {
// 移除已存在的显示
const existing = document.querySelector('.ehx-preload-status');
if (existing) existing.remove();
const statusDisplay = document.createElement('div');
statusDisplay.className = 'ehx-preload-status show stuffbox';
statusDisplay.innerHTML = `
<div class="ehx-status-header">${t('preloadStatus')}</div>
<div class="ehx-status-list"></div>
`;
document.body.appendChild(statusDisplay);
// 添加点击头部切换显示/隐藏功能
statusDisplay.querySelector('.ehx-status-header').addEventListener('click', () => {
const list = statusDisplay.querySelector('.ehx-status-list');
list.style.display = list.style.display === 'none' ? 'block' : 'none';
});
updatePreloadStatusDisplay();
}
// 更新预加载状态
function updatePreloadStatus(pageNum, status) {
preloadStatus.set(pageNum, status);
updatePreloadStatusDisplay();
}
// 更新预加载状态显示
function updatePreloadStatusDisplay() {
if (pendingPreloadRender) return;
pendingPreloadRender = true;
requestAnimationFrame(() => {
pendingPreloadRender = false;
const statusDisplay = document.querySelector('.ehx-preload-status');
if (!statusDisplay) return;
const statusList = statusDisplay.querySelector('.ehx-status-list');
if (!statusList) return;
// 获取当前页面附近的状态
const relevantPages = [];
for (let i = Math.max(1, currentPage - 2); i <= Math.min(totalPages, currentPage + CONFIG.preloadCount + 2); i++) {
relevantPages.push(i);
}
statusList.innerHTML = relevantPages.map(pageNum => {
const status = preloadStatus.get(pageNum) || (pageDataCache.has(pageNum) ? 'completed' : 'unknown');
const isCurrent = pageNum === currentPage;
const statusText = getStatusText(status);
const statusClass = `ehx-status-${status}`;
return `
<div class="ehx-status-item ${isCurrent ? 'current' : ''}">
<span class="ehx-status-page">${isCurrent ? `► ${pageNum}` : pageNum}</span>
<span class="ehx-status-state ${statusClass}">${statusText}</span>
</div>
`;
}).join('');
});
}
// 获取状态文本
function getStatusText(status) {
switch(status) {
case 'waiting': return t('status_waiting');
case 'loading': return t('status_loading');
case 'completed': return t('status_completed');
case 'failed': return t('status_failed');
default: return t('status_unknown');
}
}
// 应用当前语言到 UI
function applyLanguage() {
// 顶部按钮与标题
const btnW = document.getElementById('ehx-fit-width');
const btnH = document.getElementById('ehx-fit-height');
const btnMenu = document.getElementById('ehx-menu-open');
const indicator = document.getElementById('loading-indicator');
if (btnW) btnW.textContent = t('fitWidth');
if (btnH) btnH.textContent = t('fitHeight');
if (btnMenu) btnMenu.title = t('settings');
if (indicator) indicator.textContent = t('loading');
// 预加载状态标题
const statusHeader = document.querySelector('.ehx-preload-status .ehx-status-header');
if (statusHeader) statusHeader.textContent = t('preloadStatus');
// 重新渲染菜单（保留显示状态）
const oldMenu = document.querySelector('.ehx-control-menu');
const wasShown = oldMenu && oldMenu.classList.contains('show');
if (oldMenu) oldMenu.remove();
addControlMenu();
const newMenu = document.querySelector('.ehx-control-menu');
if (newMenu && wasShown) newMenu.classList.add('show');
// 刷新预加载状态里的文本
updatePreloadStatusDisplay();
}
})();
