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892 lines
43 KiB
HTML
892 lines
43 KiB
HTML
<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<script class="next-config" data-name="main" type="application/json">{"hostname":"toozhao.com","root":"/","images":"/images","scheme":"Muse","darkmode":false,"version":"8.28.0","exturl":false,"sidebar":{"position":"left","width_expanded":320,"width_dual_column":240,"display":"post","padding":18,"offset":12,"b2t":true,"scrollpercent":true},"hljswrap":true,"codeblock":{"theme":{"light":"default","dark":"stackoverflow-dark"},"prism":{"light":"prism","dark":"prism-dark"},"copy_button":{"enable":true,"style":"mac"},"fold":{"enable":false,"height":500},"language":false},"bookmark":{"enable":true,"color":"#222","save":"auto"},"mediumzoom":true,"lazyload":false,"pangu":false,"comments":{"style":"tabs","active":null,"storage":true,"lazyload":false,"nav":null},"stickytabs":false,"motion":{"enable":false,"async":false,"duration":200,"transition":{"menu_item":"fadeInDown","post_block":"fadeIn","post_header":"fadeInDown","post_body":"fadeInDown","coll_header":"fadeInLeft","sidebar":"fadeInUp"}},"prism":false,"i18n":{"placeholder":"搜索...","empty":"没有找到任何搜索结果：${query}","hits_time":"找到 ${hits} 个搜索结果（用时 ${time} 毫秒）","hits":"找到 ${hits} 个搜索结果"},"path":"/search.xml","localsearch":{"enable":true,"top_n_per_article":5,"unescape":false,"preload":false,"trigger":"auto"}}</script><script src="/js/config.js" defer></script>
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<meta name="description" content="原谅我使用如此晦涩的词语来表达我的意思，其实我想表达的意思的用java实现类似于当其他人登录你的QQ时，你会收到“你的账号已在其他地方登录，请重新登录。”这样的东西，简单的说就是同一时刻一账号只允许一个人登录在线状态。也许就是保证时间、空间上的唯一性。但是我想强调的是这种效果绝不是单点登录，真正的单点登录是类似于Google中，使用多个产品只需要登录一次，其实QQ也有这样的功能。好了，废话少说下面">
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<meta property="og:type" content="article">
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<meta property="og:title" content="Java实现单一账号某时刻单一登录">
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<meta property="og:url" content="https://toozhao.com/2011/12/20/java-single-sign-on/">
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<meta property="og:site_name" content="大染志">
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<meta property="og:description" content="原谅我使用如此晦涩的词语来表达我的意思，其实我想表达的意思的用java实现类似于当其他人登录你的QQ时，你会收到“你的账号已在其他地方登录，请重新登录。”这样的东西，简单的说就是同一时刻一账号只允许一个人登录在线状态。也许就是保证时间、空间上的唯一性。但是我想强调的是这种效果绝不是单点登录，真正的单点登录是类似于Google中，使用多个产品只需要登录一次，其实QQ也有这样的功能。好了，废话少说下面">
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<meta property="og:locale" content="zh_CN">
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<meta property="article:published_time" content="2011-12-20T13:00:00.000Z">
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<meta property="article:modified_time" content="2026-08-11T12:22:51.369Z">
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<meta property="article:author" content="Junv">
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<meta property="article:tag" content="java">
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<meta property="article:tag" content="Application">
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<meta property="article:tag" content="JAVA EE">
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<meta property="article:tag" content="Session">
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<meta name="twitter:card" content="summary">
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<link rel="canonical" href="https://toozhao.com/2011/12/20/java-single-sign-on/">
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<script class="next-config" data-name="page" type="application/json">{"sidebar":"","isHome":false,"isPost":true,"lang":"zh-CN","comments":true,"permalink":"https://toozhao.com/2011/12/20/java-single-sign-on/","path":"2011/12/20/java-single-sign-on/","title":"Java实现单一账号某时刻单一登录"}</script>
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<script class="next-config" data-name="calendar" type="application/json">""</script>
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<title>Java实现单一账号某时刻单一登录 | 大染志</title>
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/* =========================================================
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Toozhao blog custom styles (injected via head.njk)
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阅读体验优化 — 微信读书风格
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/* =========================================================
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阅读设置（Aa 悬浮按钮 + 面板）— 参考 Links Reading settings
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========================================================= */
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/* 设置面板 */
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position: fixed;
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left: 68px;
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bottom: 108px;
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z-index: 1001;
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width: 268px;
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background: #fff;
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border-radius: 14px;
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box-shadow: 0 14px 44px rgba(0, 0, 0, 0.2);
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padding: 16px 18px 14px;
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font-size: 13px;
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color: #333;
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display: none;
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transform-origin: bottom left;
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animation: rpIn 0.18s ease;
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}
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@keyframes rpIn {
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from { opacity: 0; transform: translateY(8px) scale(0.96); }
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to { opacity: 1; transform: none; }
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}
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margin: 0 0 8px;
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font-size: 11px;
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font-weight: 700;
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letter-spacing: 0.1em;
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color: #9aa0a8;
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text-transform: uppercase;
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}
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.reading-panel .rp-row { margin-bottom: 15px; }
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.reading-panel .rp-row:last-of-type { margin-bottom: 10px; }
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/* 主题色 swatch */
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.rp-themes { display: flex; gap: 8px; }
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.rp-themes .sw {
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flex: 1;
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border: 2px solid transparent;
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border-radius: 10px;
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padding: 6px 4px 5px;
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cursor: pointer;
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background: none;
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font-size: 12px;
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color: #666;
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display: flex;
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flex-direction: column;
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align-items: center;
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gap: 4px;
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transition: border-color 0.15s;
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}
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.rp-themes .sw span {
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display: block;
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width: 30px;
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height: 22px;
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border-radius: 6px;
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border: 1px solid rgba(0, 0, 0, 0.12);
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}
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.rp-themes .sw.active { border-color: #4a90d9; color: #4a90d9; font-weight: 600; }
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.sw-paper span { background: #f7f0e4; }
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.sw-green span { background: #e2efe4; }
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.sw-night span { background: #1b1f24; }
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/* 字体选项 */
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.rp-fonts { display: flex; flex-wrap: wrap; gap: 6px; }
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.rp-fonts button {
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flex: 1 1 40%;
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border: 1px solid #e2e5ea;
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background: #f8f9fb;
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border-radius: 8px;
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padding: 6px 4px;
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font-size: 12.5px;
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color: #444;
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cursor: pointer;
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transition: all 0.15s;
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}
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.rp-fonts button.active { background: #eaf2fd; border-color: #4a90d9; color: #2d6cdf; font-weight: 600; }
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.rp-fonts button:nth-child(n+5) { flex-basis: 100%; }
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/* 字号 */
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.rp-size button {
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width: 36px;
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height: 30px;
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border-radius: 8px;
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border: 1px solid #e2e5ea;
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background: #f8f9fb;
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font-size: 14px;
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color: #444;
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cursor: pointer;
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transition: all 0.15s;
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}
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.rp-size button:hover { background: #eaf2fd; border-color: #4a90d9; color: #2d6cdf; }
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.rp-size-val {
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flex: 1;
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text-align: center;
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font-size: 13.5px;
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font-weight: 600;
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color: #555;
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||
background: #f8f9fb;
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border-radius: 8px;
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||
padding: 5px 0;
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||
}
|
||
|
||
/* 行距 */
|
||
.rp-spacing { display: flex; gap: 6px; }
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||
.rp-spacing button {
|
||
flex: 1;
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||
border: 1px solid #e2e5ea;
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||
background: #f8f9fb;
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||
border-radius: 8px;
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||
padding: 6px 0;
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||
font-size: 12.5px;
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||
color: #444;
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||
cursor: pointer;
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||
transition: all 0.15s;
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||
}
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.rp-spacing button.active { background: #eaf2fd; border-color: #4a90d9; color: #2d6cdf; font-weight: 600; }
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||
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/* 重置 */
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.rp-reset {
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width: 100%;
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||
border: none;
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||
background: none;
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||
color: #9aa0a8;
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||
font-size: 12.5px;
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||
padding: 8px 0 2px;
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cursor: pointer;
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||
border-top: 1px solid #eef0f3;
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||
margin-top: 2px;
|
||
transition: color 0.15s;
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||
}
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||
.rp-reset:hover { color: #4a90d9; }
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||
|
||
/* ---- 阅读主题应用 ---- */
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||
body[data-rtheme="paper"] { background: #f7f0e4 !important; }
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||
body[data-rtheme="paper"] .post-body { color: #4a4238; }
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body[data-rtheme="paper"] .post-body h1, body[data-rtheme="paper"] .post-body h2,
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||
body[data-rtheme="paper"] .post-body h3, body[data-rtheme="paper"] .post-body h4,
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||
body[data-rtheme="paper"] .post-body h5, body[data-rtheme="paper"] .post-body h6 { color: #3a332b; }
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body[data-rtheme="paper"] .post-body a { color: #8a5a2b; border-bottom-color: rgba(138, 90, 43, 0.3); }
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body[data-rtheme="paper"] .post-body a:hover { color: #6b4420; }
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body[data-rtheme="paper"] .post-body blockquote { background: rgba(138, 90, 43, 0.07); color: #6b5d4a; }
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body[data-rtheme="paper"] .post-body code { background: rgba(0, 0, 0, 0.06); color: #8a4a3a; }
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body[data-rtheme="paper"] .post-body table th { background: #efe7d5; }
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||
body[data-rtheme="paper"] .post-body table tr:nth-child(even) { background: #f4ede0; }
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||
body[data-rtheme="paper"] .reading-panel { background: #fdfaf3; color: #4a4238; }
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body[data-rtheme="green"] { background: #e2efe4 !important; }
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||
body[data-rtheme="green"] .post-body { color: #2f4a36; }
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||
body[data-rtheme="green"] .post-body h1, body[data-rtheme="green"] .post-body h2,
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body[data-rtheme="green"] .post-body h3, body[data-rtheme="green"] .post-body h4,
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||
body[data-rtheme="green"] .post-body h5, body[data-rtheme="green"] .post-body h6 { color: #23402c; }
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body[data-rtheme="green"] .post-body a { color: #1d6b3c; border-bottom-color: rgba(29, 107, 60, 0.3); }
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body[data-rtheme="green"] .post-body a:hover { color: #14522d; }
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body[data-rtheme="green"] .post-body blockquote { background: rgba(29, 107, 60, 0.08); color: #41604c; }
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body[data-rtheme="green"] .post-body code { background: rgba(0, 0, 0, 0.05); color: #1d6b3c; }
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body[data-rtheme="green"] .post-body table th { background: #d4e8d8; }
|
||
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Java实现单一账号某时刻单一登录
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<div class="post-body" itemprop="articleBody"><p>原谅我使用如此晦涩的词语来表达我的意思，其实我想表达的意思的用java实现类似于当其他人登录你的QQ时，你会收到“你的账号已在其他地方登录，请重新登录。”这样的东西，简单的说就是同一时刻一账号只允许一个人登录在线状态。也许就是保证时间、空间上的唯一性。但是我想强调的是这种效果绝不是单点登录，真正的单点登录是类似于Google中，使用多个产品只需要登录一次，其实QQ也有这样的功能。好了，废话少说下面说正经的。</p>
|
||
<p>我们最常用的用来验证用户使用登录的东西是Session，但是session并不能达到我们想要的效果，因为每个客户端访问网站的时候都会获得一个session，因此虽然是同一个账号登录系统，只要用户使用的浏览器，服务器都会产生两个session。但是每个客户端访问服务器的服务器的时候都会产生一个SessionId,而这个ID这是唯一的，我们会在后面用到。这里我们使用使用Application 域，在Java EE里面是ServletContext。这个东西是一个全局变量，当Web 程序运行的时候便会一直存在。而且整个程序只有一个Application.</p>
|
||
<p>于是我们可以这样。我们将数据存入Application中。而存入的内容则是：键（key）为当前用户使用用户名或者其他一个可以识别用户身份信息的ID，而值（value）则是用户得到的sessionID。这样便保证了一个账号同时至于一个用户对应。在用户登录的时候想Application中写入 key:value信息，在以后用户每次请求数据的时候，进行验证。看Application中的SessionID与用户本身的SessionID是否一致，不一致则说明多人登录。</p>
|
||
<p>下面是代码了：（我感觉说了好多废话）</p>
|
||
<p>首先获取Application:</p>
|
||
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="type">HttpSession</span> <span class="variable">session</span> <span class="operator">=</span> request.getSession(); <span class="comment">//request为HttpServletRequest对象</span></span><br><span class="line"> <span class="type">ServletContext</span> <span class="variable">application</span> <span class="operator">=</span> session.getServletContext();</span><br></pre></td></tr></table></figure>
|
||
|
||
<p>向其中存入我们的验证数据，这里键为用户ID，值为该用户实例获得的sessionID</p>
|
||
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">application.setAttribute(userId, session.getId());<span class="comment">//userID为用户ID，</span></span><br></pre></td></tr></table></figure>
|
||
|
||
<p>在每次验证的时候，在java里面我们可以采用至少两种方法，一种是Filter(Servlet 过滤器)、另外一种则是Spring AOC 面向切面编程，这里由于我对Spring AOC还不太熟悉，所以就用Filter，Filter具体设置，编写都不说了，只说一些怎么处理。拿到一个客户端来的请求，就进行sessionID比较，如果相同就让请求继续，如果不相同，就将该请求所对于的session清空（如果采用session验证用户是否登录，就可以达到让该用户退出登录）,并给出提示信息，跳转到登录页面。</p>
|
||
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//获取application对象</span></span><br><span class="line"> <span class="type">ServletContext</span> <span class="variable">application</span> <span class="operator">=</span> session.getServletContext();</span><br><span class="line"> <span class="type">String</span> <span class="variable">sessionId</span> <span class="operator">=</span> (String) application.getAttribute(userid);</span><br><span class="line"> <span class="type">String</span> <span class="variable">trueSessionId</span> <span class="operator">=</span> session.getId();</span><br><span class="line"> System.out.println(<span class="string">"sessionID====="</span>+sessionId+<span class="string">"现在的sessionID"</span>+trueSessionId);</span><br><span class="line"> <span class="keyword">if</span>(sessionId.equals(trueSessionId)){</span><br><span class="line"> <span class="comment">//do nothing</span></span><br><span class="line"> }<span class="keyword">else</span>{</span><br><span class="line"> <span class="comment">//说明有多个用户登录,去掉其session</span></span><br><span class="line"> session.removeAttribute(sessionKey);</span><br><span class="line"> <span class="comment">//response.sendRedirect(request.getContextPath() + redirectURL);</span></span><br><span class="line"> response.setContentType(<span class="string">"text/html;charset=utf-8"</span>);</span><br><span class="line"> <span class="type">PrintWriter</span> <span class="variable">out</span> <span class="operator">=</span> response.getWriter();</span><br><span class="line"> out.println(MyTools.getAlertMessage(request.getContextPath(), <span class="string">"您的账户已在别处登录，请重新登录"</span>, <span class="number">3</span>));</span><br><span class="line"> <span class="keyword">return</span>;</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
|
||
|
||
<p>这里可以使用sendRedirect,将用户直接跳转到某个页面，但是这样不太友好，因为没有提示信息，我选择另外一个使用response给用户一些提示信息，然后设置一段时间后跳转到另外的页面。这就是我写的一个静态方法 getAlertMessage,下面贴出具体代码吧。</p>
|
||
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 生成用户返回的警告页面信息</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@param</span> path</span></span><br><span class="line"><span class="comment"> * 系统根目录</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@param</span> content</span></span><br><span class="line"><span class="comment"> * 需要显示的内容</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@param</span> second</span></span><br><span class="line"><span class="comment"> * 需要停留消息的秒数</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@return</span> String</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">public</span> <span class="keyword">static</span> String <span class="title function_">getAlertMessage</span><span class="params">(String path, String content, <span class="type">int</span> second)</span> {</span><br><span class="line"> <span class="type">StringBuilder</span> <span class="variable">sb</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="title class_">StringBuilder</span>();</span><br><span class="line"> sb.append(<span class="string">""</span>);</span><br><span class="line"> sb.append(<span class="string">""</span>);</span><br><span class="line"> sb.append(<span class="string">""</span>);</span><br><span class="line"> sb.append(<span class="string">""</span>);</span><br><span class="line"> sb.append(<span class="string">""</span>);</span><br><span class="line"> sb.append(<span class="string">""</span></span><br><span class="line"> + content</span><br><span class="line"> + <span class="string">","</span></span><br><span class="line"> + second</span><br><span class="line"> + <span class="string">"秒后你将跳转到登录页面"</span>);</span><br><span class="line"> sb.append(<span class="string">""</span>);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> sb.toString();</span><br><span class="line"></span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
|
||
|
||
<p>好了，现在差不多实现这个功能的主要代码都有了。原谅我的表达能力不够好，如果各位有什么问题，留言吧。我们可以讨论一下。</p>
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<strong>本文作者： </strong>Junv
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<strong>本文链接：</strong>
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<strong>版权声明： </strong>本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" rel="noopener" target="_blank"><i class="fab fa-fw fa-creative-commons"></i>BY-NC-SA</a> 许可协议。转载请注明出处！
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<span class="author" itemprop="copyrightHolder">Junv</span>
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<div class="powered-by">由 <a href="https://hexo.io/" rel="noopener" target="_blank">Hexo</a> & <a href="https://theme-next.js.org/muse/" rel="noopener" target="_blank">NexT.Muse</a> 强力驱动
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<script src="/js/tag-cloud.js"></script>
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<script>
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/* =========================================================
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阅读设置面板（Aa 按钮）— 参考 Links Reading settings
|
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支持：背景主题 / 字体类型 / 字号 / 行距 / 重置，localStorage 记忆
|
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========================================================= */
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(function () {
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'use strict';
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var LS_KEY = 'toozhao-reading';
|
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var state = { theme: 'light', font: 'system', size: 1.05, spacing: 'cozy' };
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var FONTS = {
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system: '', /* 默认（Linux 系统字体） */
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serif: 'Georgia, "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif',
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sans: '"Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", "WenQuanYi Micro Hei", sans-serif',
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kai: '"KaiTi", "STKaiti", "Kaiti SC", "AR PL UKai CN", serif',
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mono: 'SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace'
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};
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var THEMES = { light: '明亮', paper: '纸感', green: '护眼', night: '夜间' };
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var SPACING = {
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||
compact: { label: '紧凑', lh: 1.6 },
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cozy: { label: '舒适', lh: 1.9 },
|
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relaxed: { label: '宽松', lh: 2.3 }
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};
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function loadState() {
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try {
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var raw = localStorage.getItem(LS_KEY);
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if (!raw) return;
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var s = JSON.parse(raw);
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if (THEMES[s.theme]) state.theme = s.theme;
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if (FONTS.hasOwnProperty(s.font)) state.font = s.font;
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if (typeof s.size === 'number' && s.size >= 0.8 && s.size <= 1.5) state.size = s.size;
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if (SPACING[s.spacing]) state.spacing = s.spacing;
|
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} catch (e) { /* ignore */ }
|
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}
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function saveState() {
|
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try { localStorage.setItem(LS_KEY, JSON.stringify(state)); } catch (e) { /* ignore */ }
|
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}
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function buildUI() {
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if (document.getElementById('reading-toggle')) return;
|
||
|
||
var toggle = document.createElement('button');
|
||
toggle.id = 'reading-toggle';
|
||
toggle.className = 'reading-toggle';
|
||
toggle.title = '阅读设置';
|
||
toggle.textContent = 'Aa';
|
||
document.body.appendChild(toggle);
|
||
|
||
var panel = document.createElement('div');
|
||
panel.id = 'reading-panel';
|
||
panel.className = 'reading-panel';
|
||
|
||
// 主题（swatch 全部为硬编码静态 HTML，无用户输入，安全）
|
||
var rowT = document.createElement('div');
|
||
rowT.className = 'rp-row';
|
||
rowT.innerHTML = '<h4>主题</h4><div class="rp-themes">' +
|
||
['light', 'paper', 'green', 'night'].map(function (t) {
|
||
return '<button class="sw sw-' + t + '" data-theme="' + t + '" title="' + THEMES[t] + '"><span></span>' + THEMES[t] + '</button>';
|
||
}).join('') + '</div>';
|
||
|
||
var rowF = document.createElement('div');
|
||
rowF.className = 'rp-row';
|
||
rowF.innerHTML = '<h4>字体</h4><div class="rp-fonts">' +
|
||
['system', 'serif', 'sans', 'kai', 'mono'].map(function (f) {
|
||
var label = { system: '系统', serif: '宋体', sans: '黑体', kai: '楷体', mono: '等宽' }[f];
|
||
return '<button data-font="' + f + '">' + label + '</button>';
|
||
}).join('') + '</div>';
|
||
|
||
var rowS = document.createElement('div');
|
||
rowS.className = 'rp-row';
|
||
rowS.innerHTML = '<h4>字号</h4><div class="rp-size">' +
|
||
'<button class="rp-minus" title="减小">A−</button><span class="rp-size-val">17px</span><button class="rp-plus" title="增大">A+</button></div>';
|
||
|
||
var rowSp = document.createElement('div');
|
||
rowSp.className = 'rp-row';
|
||
rowSp.innerHTML = '<h4>行距</h4><div class="rp-spacing">' +
|
||
['compact', 'cozy', 'relaxed'].map(function (s) {
|
||
return '<button data-spacing="' + s + '">' + SPACING[s].label + '</button>';
|
||
}).join('') + '</div>';
|
||
|
||
var reset = document.createElement('button');
|
||
reset.className = 'rp-reset';
|
||
reset.textContent = '↺ 恢复默认';
|
||
reset.addEventListener('click', function () {
|
||
state = { theme: 'light', font: 'system', size: 1.05, spacing: 'cozy' };
|
||
saveState();
|
||
apply();
|
||
render();
|
||
});
|
||
|
||
panel.appendChild(rowT);
|
||
panel.appendChild(rowF);
|
||
panel.appendChild(rowS);
|
||
panel.appendChild(rowSp);
|
||
panel.appendChild(reset);
|
||
document.body.appendChild(panel);
|
||
|
||
toggle.addEventListener('click', function (e) {
|
||
e.stopPropagation();
|
||
panel.classList.toggle('open');
|
||
toggle.classList.toggle('active', panel.classList.contains('open'));
|
||
});
|
||
panel.addEventListener('click', function (e) { e.stopPropagation(); });
|
||
|
||
panel.querySelectorAll('.sw').forEach(function (b) {
|
||
b.addEventListener('click', function () { state.theme = b.dataset.theme; saveState(); apply(); render(); });
|
||
});
|
||
panel.querySelectorAll('.rp-fonts button').forEach(function (b) {
|
||
b.addEventListener('click', function () { state.font = b.dataset.font; saveState(); apply(); render(); });
|
||
});
|
||
panel.querySelectorAll('.rp-spacing button').forEach(function (b) {
|
||
b.addEventListener('click', function () { state.spacing = b.dataset.spacing; saveState(); apply(); render(); });
|
||
});
|
||
panel.querySelector('.rp-minus').addEventListener('click', function () {
|
||
state.size = Math.max(0.8, +(state.size - 0.05).toFixed(2)); saveState(); apply(); render();
|
||
});
|
||
panel.querySelector('.rp-plus').addEventListener('click', function () {
|
||
state.size = Math.min(1.5, +(state.size + 0.05).toFixed(2)); saveState(); apply(); render();
|
||
});
|
||
|
||
document.addEventListener('click', function (e) {
|
||
if (panel.classList.contains('open') && !panel.contains(e.target) && e.target !== toggle) {
|
||
panel.classList.remove('open');
|
||
toggle.classList.remove('active');
|
||
}
|
||
});
|
||
document.addEventListener('keydown', function (e) {
|
||
if (e.key === 'Escape' && panel.classList.contains('open')) {
|
||
panel.classList.remove('open');
|
||
toggle.classList.remove('active');
|
||
}
|
||
});
|
||
}
|
||
|
||
function apply() {
|
||
var body = document.body;
|
||
var pb = document.querySelector('.post-body');
|
||
|
||
body.setAttribute('data-rtheme', state.theme);
|
||
if (pb) {
|
||
pb.style.fontFamily = FONTS[state.font] || '';
|
||
pb.style.fontSize = state.size + 'em';
|
||
pb.style.lineHeight = SPACING[state.spacing].lh;
|
||
}
|
||
}
|
||
|
||
function render() {
|
||
var panel = document.getElementById('reading-panel');
|
||
if (!panel) return;
|
||
|
||
panel.querySelectorAll('.sw').forEach(function (b) {
|
||
b.classList.toggle('active', b.dataset.theme === state.theme);
|
||
});
|
||
panel.querySelectorAll('.rp-fonts button').forEach(function (b) {
|
||
b.classList.toggle('active', b.dataset.font === state.font);
|
||
});
|
||
panel.querySelectorAll('.rp-spacing button').forEach(function (b) {
|
||
b.classList.toggle('active', b.dataset.spacing === state.spacing);
|
||
});
|
||
var val = panel.querySelector('.rp-size-val');
|
||
if (val) val.textContent = Math.round(16 * state.size) + 'px';
|
||
}
|
||
|
||
function init() {
|
||
loadState();
|
||
buildUI();
|
||
apply();
|
||
render();
|
||
}
|
||
|
||
if (document.readyState === 'loading') {
|
||
document.addEventListener('DOMContentLoaded', init);
|
||
} else {
|
||
init();
|
||
}
|
||
})();
|
||
</script>
|
||
|
||
</body>
|
||
</html>
|