TC
/
arozos-mirror
镜像自地址 https://github.com/tobychui/arozos


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <title>Text</title>
    <script src="../script/jquery.min.js"></script>
    <script src="../script/ao_module.js"></script>
    <script src="lib/marked.min.js"></script>
    <script src="lib/turndown.min.js"></script>
    <script src="lib/turndown-plugin-gfm.min.js"></script>
    <script src="lib/pdf-lib.min.js"></script>
    <style>
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        :root {
            --toolbar-h:    42px;
            --statusbar-h:  22px;
            --bg:           #e4e9f2;
            --toolbar-bg:   #f6f7fb;
            --toolbar-bdr:  #e2e4ec;
            --editor-bg:    #ffffff;
            --text:         #2b2f38;
            --text2:        #8a90a2;
            --accent:       #2f6bd8;
            --accent-soft:  rgba(47,107,216,.12);
            --sep:          #d7dbe6;
            --hover:        rgba(0,0,0,.06);
            --btn-active-bg:#2f6bd8;
            --btn-active-fg:#fff;
            --dirty-color:  #2f6bd8;
            --code-bg:      #f1f3f8;
            --quote-bdr:    #d2d8e6;
            --table-bdr:    #dfe3ec;
            --shadow:       0 10px 40px rgba(30,40,70,.18);
        }
        body.dark {
            --bg:           #0f131b;
            --toolbar-bg:   #161c27;
            --toolbar-bdr:  #232c3b;
            --editor-bg:    #121722;
            --text:         #d6def0;
            --text2:        #6b7793;
            --accent:       #5b9cf6;
            --accent-soft:  rgba(91,156,246,.16);
            --sep:          #2a3445;
            --hover:        rgba(255,255,255,.07);
            --btn-active-bg:#5b9cf6;
            --btn-active-fg:#0f131b;
            --dirty-color:  #5b9cf6;
            --code-bg:      #1b2230;
            --quote-bdr:    #313c50;
            --table-bdr:    #2a3445;
            --shadow:       0 10px 40px rgba(0,0,0,.55);
        }

        html, body {
            height: 100%;
            background: var(--bg);
            color: var(--text);
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            font-size: 13px;
        }

        #app { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }

        /* ── Toolbar ──────────────────────────────────────────────────────── */
        #toolbar {
            display: flex; align-items: center; gap: 1px; flex-shrink: 0;
            height: var(--toolbar-h); padding: 0 8px;
            background: var(--toolbar-bg);
            border-bottom: 1px solid var(--toolbar-bdr);
            box-shadow: 0 1px 4px rgba(0,0,0,.06);
            overflow-x: auto; overflow-y: hidden; position: relative; z-index: 5;
            scrollbar-width: thin;
        }
        #toolbar::-webkit-scrollbar { height: 4px; }
        #toolbar::-webkit-scrollbar-thumb { background: var(--sep); border-radius: 3px; }

        .tb-btn {
            display: inline-flex; align-items: center; gap: 4px; height: 28px;
            padding: 0 8px; border: none; border-radius: 6px; background: none;
            color: var(--text); font-size: 12px; font-family: inherit; cursor: pointer;
            white-space: nowrap; flex-shrink: 0; transition: background .1s; user-select: none;
        }
        .tb-btn:hover  { background: var(--hover); }
        .tb-btn.active { background: var(--btn-active-bg); color: var(--btn-active-fg); }
        .tb-btn svg { display: block; }
        .tb-btn .glyph { width: 15px; text-align: center; font-size: 13px; line-height: 1; }

        .tb-sep { width: 1px; height: 20px; background: var(--sep); flex-shrink: 0; margin: 0 4px; }
        .tb-spacer { flex: 1 1 auto; min-width: 6px; }
        .tb-label { font-size: 11px; color: var(--text2); flex-shrink: 0; white-space: nowrap; }

        .tb-select {
            height: 26px; padding: 0 6px; border: 1px solid var(--toolbar-bdr);
            border-radius: 6px; background: var(--editor-bg); color: var(--text);
            font-size: 12px; font-family: inherit; outline: none; cursor: pointer;
            flex-shrink: 0; transition: border-color .1s;
        }
        .tb-select:focus { border-color: var(--accent); }

        /* dropdown menu (export / image) */
        .menu-wrap { position: relative; flex-shrink: 0; }
        .menu {
            display: none; position: fixed; min-width: 180px;
            background: var(--editor-bg); border: 1px solid var(--toolbar-bdr);
            border-radius: 10px; box-shadow: var(--shadow); padding: 6px; z-index: 120;
        }
        .menu.show { display: block; }
        .menu-item {
            display: flex; align-items: center; gap: 9px; width: 100%; padding: 8px 10px;
            border: none; background: none; color: var(--text); font-size: 12.5px;
            font-family: inherit; border-radius: 7px; cursor: pointer; text-align: left;
        }
        .menu-item:hover { background: var(--accent-soft); }
        .menu-item svg { flex-shrink: 0; color: var(--text2); }

        /* hide markdown-only controls when editing plain text */
        body.mode-txt .md-only { display: none !important; }

        /* ── Editor surfaces ──────────────────────────────────────────────── */
        #editor-scroll {
            flex: 1; min-height: 0; overflow-y: auto; background: var(--editor-bg);
            transition: background .2s, color .2s; position: relative;
        }
        #rich, #plain {
            max-width: 820px; margin: 0 auto; min-height: 100%;
            padding: 40px clamp(18px, 6vw, 60px) 120px;
            outline: none; color: var(--text); line-height: 1.7;
            font-size: 16px; word-wrap: break-word;
        }
        #plain {
            display: none; width: 100%; border: none; resize: none; background: none;
            font-family: 'SF Mono', 'Consolas', 'Courier New', monospace;
            font-size: 14px; white-space: pre-wrap; tab-size: 4; -moz-tab-size: 4;
        }
        body.mode-txt #rich  { display: none; }
        body.mode-txt #plain { display: block; }

        #rich:empty::before, #rich.is-empty::before {
            content: attr(data-ph); color: var(--text2); pointer-events: none;
        }

        /* ── Markdown content typography (shared by editor + export) ──────── */
        .md-content h1, .md-content h2, .md-content h3,
        .md-content h4, .md-content h5, .md-content h6 {
            font-weight: 700; line-height: 1.3; margin: 1.4em 0 .6em;
        }
        .md-content h1 { font-size: 2em;   border-bottom: 1px solid var(--sep); padding-bottom: .25em; }
        .md-content h2 { font-size: 1.6em; border-bottom: 1px solid var(--sep); padding-bottom: .2em; }
        .md-content h3 { font-size: 1.3em; }
        .md-content h4 { font-size: 1.1em; }
        .md-content h5 { font-size: 1em; }
        .md-content h6 { font-size: .9em; color: var(--text2); }
        .md-content p  { margin: .55em 0; }
        .md-content a  { color: var(--accent); text-decoration: none; }
        .md-content a:hover { text-decoration: underline; }
        .md-content ul, .md-content ol { margin: .5em 0; padding-left: 1.7em; }
        .md-content li { margin: .25em 0; }
        .md-content blockquote {
            margin: .8em 0; padding: .2em 1em; color: var(--text2);
            border-left: 3px solid var(--quote-bdr); background: var(--accent-soft);
            border-radius: 0 6px 6px 0;
        }
        .md-content code {
            font-family: 'SF Mono', 'Consolas', 'Courier New', monospace; font-size: .88em;
            background: var(--code-bg); padding: .15em .4em; border-radius: 4px;
        }
        .md-content pre {
            margin: .8em 0; padding: 14px 16px; background: var(--code-bg);
            border-radius: 8px; overflow-x: auto;
        }
        .md-content pre code { background: none; padding: 0; font-size: .85em; line-height: 1.55; }
        .md-content hr { border: none; border-top: 1px solid var(--sep); margin: 1.6em 0; }
        .md-content img { max-width: 100%; border-radius: 6px; vertical-align: middle; }
        .md-content table { border-collapse: collapse; margin: .8em 0; width: auto; max-width: 100%; }
        .md-content th, .md-content td { border: 1px solid var(--table-bdr); padding: 6px 12px; }
        .md-content th { background: var(--code-bg); font-weight: 600; }
        .md-content ul.contains-task-list { list-style: none; padding-left: 1.2em; }
        .md-content li.task-list-item { list-style: none; }
        .md-content input[type=checkbox] { margin-right: .5em; }

        /* ── Status bar ───────────────────────────────────────────────────── */
        #statusbar {
            flex-shrink: 0; height: var(--statusbar-h); display: flex; align-items: center;
            justify-content: space-between; padding: 0 12px; background: var(--toolbar-bg);
            border-top: 1px solid var(--toolbar-bdr); font-size: 10.5px; color: var(--text2);
        }
        #status-msg.dirty { color: var(--dirty-color); }
        #status-msg.error { color: #d9534f; }
        #status-right { display: flex; gap: 12px; align-items: center; }

        /* ── Settings panel ───────────────────────────────────────────────── */
        .overlay {
            display: none; position: fixed; inset: 0; background: rgba(10,15,25,.45);
            backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
            z-index: 200; align-items: center; justify-content: center; padding: 20px;
        }
        .overlay.show { display: flex; }

        #settings-box {
            background: var(--editor-bg); border: 1px solid var(--toolbar-bdr);
            border-radius: 14px; box-shadow: var(--shadow); width: 760px; max-width: 100%;
            height: 520px; max-height: 90vh; display: flex; overflow: hidden;
        }
        #settings-nav {
            width: 180px; flex-shrink: 0; background: var(--toolbar-bg);
            border-right: 1px solid var(--toolbar-bdr); padding: 14px 10px; overflow-y: auto;
        }
        #settings-nav .nav-title { font-size: 13px; font-weight: 700; padding: 4px 10px 12px; }
        .nav-item {
            display: flex; align-items: center; gap: 9px; width: 100%; padding: 9px 10px;
            border: none; background: none; color: var(--text); font-size: 13px;
            font-family: inherit; border-radius: 8px; cursor: pointer; text-align: left; margin-bottom: 2px;
        }
        .nav-item:hover { background: var(--hover); }
        .nav-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
        .nav-item svg { flex-shrink: 0; }

        #settings-body { flex: 1; padding: 22px 26px; overflow-y: auto; }
        .settings-section { display: none; }
        .settings-section.active { display: block; }
        .settings-section h2 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
        .settings-section .sub { font-size: 12px; color: var(--text2); margin-bottom: 18px; }

        .set-row {
            display: flex; align-items: center; justify-content: space-between;
            gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--toolbar-bdr);
        }
        .set-row:last-child { border-bottom: none; }
        .set-label { font-size: 13px; font-weight: 600; }
        .set-desc  { font-size: 11.5px; color: var(--text2); margin-top: 2px; }
        .set-ctl { flex-shrink: 0; }
        .set-input, .set-select {
            height: 30px; padding: 0 8px; border: 1px solid var(--toolbar-bdr);
            border-radius: 7px; background: var(--editor-bg); color: var(--text);
            font-size: 12.5px; font-family: inherit; outline: none;
        }
        .set-input:focus, .set-select:focus { border-color: var(--accent); }
        .set-input.num { width: 76px; }

        /* toggle switch */
        .switch { position: relative; display: inline-block; width: 42px; height: 24px; flex-shrink: 0; }
        .switch input { opacity: 0; width: 0; height: 0; }
        .slider {
            position: absolute; cursor: pointer; inset: 0; background: var(--sep);
            border-radius: 24px; transition: .2s;
        }
        .slider::before {
            content: ""; position: absolute; height: 18px; width: 18px; left: 3px; bottom: 3px;
            background: #fff; border-radius: 50%; transition: .2s; box-shadow: 0 1px 3px rgba(0,0,0,.3);
        }
        .switch input:checked + .slider { background: var(--accent); }
        .switch input:checked + .slider::before { transform: translateX(18px); }

        /* segmented control (mode) */
        .seg { display: inline-flex; border: 1px solid var(--toolbar-bdr); border-radius: 8px; overflow: hidden; }
        .seg button {
            border: none; background: var(--editor-bg); color: var(--text); font-family: inherit;
            font-size: 12.5px; padding: 7px 14px; cursor: pointer;
        }
        .seg button.active { background: var(--accent); color: #fff; }

        /* shortcuts list */
        .key-row {
            display: flex; align-items: center; justify-content: space-between;
            padding: 9px 0; border-bottom: 1px solid var(--toolbar-bdr);
        }
        .key-row .key-name { font-size: 13px; }
        .key-cap {
            min-width: 120px; text-align: center; padding: 6px 10px; border-radius: 7px;
            border: 1px solid var(--toolbar-bdr); background: var(--code-bg); color: var(--text);
            font-size: 12px; font-family: 'SF Mono','Consolas',monospace; cursor: pointer;
        }
        .key-cap:hover { border-color: var(--accent); }
        .key-cap.recording { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

        .range-wrap { display: flex; align-items: center; gap: 10px; }
        input[type=range] { accent-color: var(--accent); }

        .btn-text {
            border: 1px solid var(--toolbar-bdr); background: var(--editor-bg); color: var(--text);
            font-family: inherit; font-size: 12.5px; padding: 7px 14px; border-radius: 8px; cursor: pointer;
        }
        .btn-text:hover { background: var(--hover); }
        .btn-text.primary { background: var(--accent); color: #fff; border-color: var(--accent); }

        #settings-foot {
            display: flex; justify-content: flex-end; gap: 8px; padding-top: 16px; margin-top: 8px;
        }

        /* ── Confirm dialog ───────────────────────────────────────────────── */
        #confirm-box {
            background: var(--editor-bg); border: 1px solid var(--toolbar-bdr);
            border-radius: 13px; padding: 24px 24px 18px; width: 320px; box-shadow: var(--shadow);
        }
        #confirm-box h3 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
        #confirm-box p  { font-size: 12.5px; color: var(--text2); line-height: 1.55; margin-bottom: 18px; }
        .confirm-row { display: flex; gap: 8px; justify-content: flex-end; }
        .cbtn {
            padding: 7px 14px; border-radius: 7px; font-size: 12.5px; font-weight: 600;
            font-family: inherit; cursor: pointer; border: none; transition: opacity .1s;
        }
        .cbtn:hover { opacity: .88; }
        .cbtn-cancel  { background: var(--hover); color: var(--text); border: 1px solid var(--toolbar-bdr); }
        .cbtn-discard { background: rgba(217,83,79,.14); color: #d9534f; border: 1px solid rgba(217,83,79,.32); }
        .cbtn-save    { background: var(--accent); color: #fff; }

        /* busy spinner for export */
        #busy {
            display: none; position: fixed; inset: 0; z-index: 400; align-items: center;
            justify-content: center; background: rgba(10,15,25,.4); color: #fff; font-size: 13px;
            flex-direction: column; gap: 14px;
        }
        #busy.show { display: flex; }
        .spin {
            width: 34px; height: 34px; border: 3px solid rgba(255,255,255,.25);
            border-top-color: #fff; border-radius: 50%; animation: spin .8s linear infinite;
        }
        @keyframes spin { to { transform: rotate(360deg); } }

        /* ── Responsive ───────────────────────────────────────────────────── */
        @media (max-width: 680px) {
            .tb-label, .tb-btn .tb-text { display: none; }
            .tb-btn { padding: 0 7px; }
            #settings-box { flex-direction: column; height: 92vh; }
            #settings-nav {
                width: 100%; display: flex; gap: 4px; overflow-x: auto; padding: 8px;
                border-right: none; border-bottom: 1px solid var(--toolbar-bdr);
            }
            #settings-nav .nav-title { display: none; }
            .nav-item { width: auto; white-space: nowrap; margin-bottom: 0; }
            #rich, #plain { padding: 24px 16px 100px; font-size: 15px; }
            .set-row { flex-direction: column; align-items: stretch; }
            .set-ctl { align-self: flex-start; }
        }

        @media print {
            #toolbar, #statusbar, .overlay, #busy { display: none !important; }
            #editor-scroll { overflow: visible; }
            #rich, #plain { max-width: 100%; padding: 0; }
        }
    </style>
</head>
<body>
<div id="app">

    <!-- ── Toolbar ──────────────────────────────────────────────────────── -->
    <div id="toolbar">
        <button class="tb-btn" onclick="openFile()" title="Open file">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z"/></svg>
            <!-- <span class="tb-text">Open</span> -->
        </button>
        <button class="tb-btn" onclick="saveFile()" title="Save (Ctrl+S)">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M19 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11l5 5v11a2 2 0 0 1-2 2z"/><polyline points="17 21 17 13 7 13 7 21"/><polyline points="7 3 7 8 15 8"/></svg>
            <!-- <span class="tb-text">Save</span> -->
        </button>

        <div class="tb-sep md-only"></div>

        <!-- Heading / block format -->
        <select id="sel-head" class="tb-select md-only" style="width:104px;" onchange="onHeadingSelect()" title="Paragraph style">
            <option value="p">Paragraph</option>
            <option value="h1">Heading 1</option>
            <option value="h2">Heading 2</option>
            <option value="h3">Heading 3</option>
            <option value="h4">Heading 4</option>
            <option value="h5">Heading 5</option>
            <option value="h6">Heading 6</option>
        </select>

        <div class="tb-sep md-only"></div>

        <button class="tb-btn md-only" id="btn-bold"   onclick="actBold()"   title="Bold"><span class="glyph"><strong>B</strong></span></button>
        <button class="tb-btn md-only" id="btn-italic" onclick="actItalic()" title="Italic"><span class="glyph"><em>I</em></span></button>
        <button class="tb-btn md-only" id="btn-strike" onclick="actStrike()" title="Strikethrough"><span class="glyph"><s>S</s></span></button>
        <button class="tb-btn md-only" id="btn-code"   onclick="actInlineCode()" title="Inline code"><span class="glyph" style="font-family:monospace;">&lt;&gt;</span></button>

        <div class="tb-sep md-only"></div>

        <button class="tb-btn md-only" onclick="actQuote()" title="Blockquote">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor"><path d="M7 7h4v4H8.5c0 1.4.6 2 2 2v2c-2.5 0-3.5-1.5-3.5-4V7zm7 0h4v4h-2.5c0 1.4.6 2 2 2v2c-2.5 0-3.5-1.5-3.5-4V7z"/></svg>
        </button>
        <button class="tb-btn md-only" onclick="actBullet()" title="Bullet list">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"><line x1="9" y1="6" x2="20" y2="6"/><line x1="9" y1="12" x2="20" y2="12"/><line x1="9" y1="18" x2="20" y2="18"/><circle cx="4" cy="6" r="1.3" fill="currentColor" stroke="none"/><circle cx="4" cy="12" r="1.3" fill="currentColor" stroke="none"/><circle cx="4" cy="18" r="1.3" fill="currentColor" stroke="none"/></svg>
        </button>
        <button class="tb-btn md-only" onclick="actNumber()" title="Numbered list">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"><line x1="10" y1="6" x2="20" y2="6"/><line x1="10" y1="12" x2="20" y2="12"/><line x1="10" y1="18" x2="20" y2="18"/><text x="2" y="8" font-size="7" fill="currentColor" stroke="none">1</text><text x="2" y="14" font-size="7" fill="currentColor" stroke="none">2</text><text x="2" y="20" font-size="7" fill="currentColor" stroke="none">3</text></svg>
        </button>
        <button class="tb-btn md-only" onclick="actCodeBlock()" title="Code block">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="16 18 22 12 16 6"/><polyline points="8 6 2 12 8 18"/></svg>
        </button>

        <div class="tb-sep md-only"></div>

        <button class="tb-btn md-only" onclick="actLink()" title="Insert link">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M10 13a5 5 0 0 0 7 0l3-3a5 5 0 0 0-7-7l-1.5 1.5"/><path d="M14 11a5 5 0 0 0-7 0l-3 3a5 5 0 0 0 7 7l1.5-1.5"/></svg>
        </button>
        <div class="menu-wrap md-only">
            <button class="tb-btn" id="btn-image" onclick="toggleMenu('img-menu')" title="Insert image">
                <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="3" width="18" height="18" rx="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg>
            </button>
            <div class="menu" id="img-menu">
                <button class="menu-item" onclick="hideMenus();pickDeviceImage()">
                    <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="17 8 12 3 7 8"/><line x1="12" y1="3" x2="12" y2="15"/></svg>
                    From this device
                </button>
                <button class="menu-item" onclick="hideMenus();pickServerImage()">
                    <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="3" width="20" height="14" rx="2"/><line x1="8" y1="21" x2="16" y2="21"/><line x1="12" y1="17" x2="12" y2="21"/></svg>
                    From server
                </button>
                <!-- <button class="menu-item" onclick="hideMenus();insertImageByUrl()">
                    <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M10 13a5 5 0 0 0 7 0l3-3a5 5 0 0 0-7-7l-1.5 1.5"/></svg>
                    By URL
                </button> -->
            </div>
        </div>

        <div class="tb-spacer"></div>

        <button class="tb-btn" id="theme-btn" onclick="toggleTheme()" title="Toggle theme">
            <svg id="icon-sun" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg>
            <svg id="icon-moon" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="display:none;"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/></svg>
        </button>

        <div class="menu-wrap">
            <button class="tb-btn" onclick="toggleMenu('export-menu')" title="Export">
                <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>
                <span class="tb-text">Export</span>
            </button>
            <div class="menu" id="export-menu">
                <button class="menu-item" id="mi-download" onclick="hideMenus();exportDocument()">
                    <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>
                    <span id="mi-download-lbl">Download document</span>
                </button>
                <button class="menu-item" onclick="hideMenus();exportHTML()">
                    <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="16 18 22 12 16 6"/><polyline points="8 6 2 12 8 18"/></svg>
                    Export as HTML
                </button>
                <button class="menu-item" onclick="hideMenus();exportPDF()">
                    <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/><polyline points="14 2 14 8 20 8"/></svg>
                    Export as PDF
                </button>
            </div>
        </div>

        <button class="tb-btn" onclick="openSettings()" title="Settings">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="3"/><path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 1 1-2.83 2.83l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-4 0v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 1 1-2.83-2.83l.06-.06a1.65 1.65 0 0 0 .33-1.82 1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1 0-4h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 1 1 2.83-2.83l.06.06a1.65 1.65 0 0 0 1.82.33H9a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 4 0v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 1 1 2.83 2.83l-.06.06a1.65 1.65 0 0 0-.33 1.82V9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 0 4h-.09a1.65 1.65 0 0 0-1.51 1z"/></svg>
        </button>
    </div>

    <!-- ── Editor ───────────────────────────────────────────────────────── -->
    <div id="editor-scroll">
        <div id="rich" class="md-content" contenteditable="true" spellcheck="false"
             data-ph="Start writing… type # for a heading, ** for bold"></div>
        <textarea id="plain" spellcheck="false" placeholder="Start typing…"></textarea>
    </div>

    <!-- ── Status bar ───────────────────────────────────────────────────── -->
    <div id="statusbar">
        <span id="status-msg">Ready</span>
        <div id="status-right">
            <span id="stat-mode">Markdown</span>
            <span id="stat-count">0 words</span>
        </div>
    </div>
</div>

<!-- hidden file input for device image picking -->
<input type="file" id="device-file" accept="image/*" style="display:none;">

<!-- ── Settings overlay ─────────────────────────────────────────────────── -->
<div class="overlay" id="settings-overlay">
    <div id="settings-box">
        <div id="settings-nav">
            <div class="nav-title">Preferences</div>
            <button class="nav-item active" data-sec="general" onclick="showSection('general')">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/><polyline points="14 2 14 8 20 8"/></svg>
                General
            </button>
            <button class="nav-item" data-sec="keys" onclick="showSection('keys')">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="6" width="20" height="12" rx="2"/><line x1="6" y1="10" x2="6" y2="10"/><line x1="10" y1="10" x2="10" y2="10"/><line x1="14" y1="10" x2="14" y2="10"/><line x1="8" y1="14" x2="16" y2="14"/></svg>
                Shortcuts
            </button>
            <button class="nav-item" data-sec="images" onclick="showSection('images')">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="3" width="18" height="18" rx="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg>
                Images
            </button>
        </div>
        <div id="settings-body">
            <!-- General -->
            <div class="settings-section active" id="sec-general">
                <h2>General</h2>
                <div class="sub">Editor behaviour and appearance.</div>

                <div class="set-row">
                    <div><div class="set-label">Document mode</div><div class="set-desc">Markdown enables live formatting; Plain text edits raw characters.</div></div>
                    <div class="set-ctl"><div class="seg" id="seg-mode">
                        <button data-mode="md"  onclick="setMode('md')">Markdown</button>
                        <button data-mode="txt" onclick="setMode('txt')">Plain text</button>
                    </div></div>
                </div>
                <div class="set-row">
                    <div><div class="set-label">Dark theme</div><div class="set-desc">Match a dark workspace.</div></div>
                    <div class="set-ctl"><label class="switch"><input type="checkbox" id="set-dark" onchange="setTheme(this.checked)"><span class="slider"></span></label></div>
                </div>
                <div class="set-row">
                    <div><div class="set-label">Editor font</div></div>
                    <div class="set-ctl"><select class="set-select" id="set-font" onchange="applyTypography()">
                        <option value="system">System Default</option>
                        <option value="serif">Serif</option>
                        <option value="mono">Monospace</option>
                        <option value="georgia">Georgia</option>
                        <option value="times">Times New Roman</option>
                    </select></div>
                </div>
                <div class="set-row">
                    <div><div class="set-label">Font size</div></div>
                    <div class="set-ctl"><input type="number" min="11" max="32" class="set-input num" id="set-fontsize" onchange="applyTypography()"> px</div>
                </div>
                <div class="set-row">
                    <div><div class="set-label">Line spacing</div></div>
                    <div class="set-ctl"><select class="set-select" id="set-lh" onchange="applyTypography()">
                        <option value="1.4">Compact</option>
                        <option value="1.7">Relaxed</option>
                        <option value="2.0">Double</option>
                    </select></div>
                </div>
            </div>

            <!-- Shortcuts -->
            <div class="settings-section" id="sec-keys">
                <h2>Keyboard Shortcuts</h2>
                <div class="sub">Click a shortcut, then press the new key combination. Press Esc to cancel.</div>
                <div id="keys-list"></div>
                <div id="settings-foot">
                    <button class="btn-text" onclick="resetKeys()">Reset to defaults</button>
                </div>
            </div>

            <!-- Images -->
            <div class="settings-section" id="sec-images">
                <h2>Images</h2>
                <div class="sub">How imported images are stored next to your document.</div>

                <div class="set-row">
                    <div><div class="set-label">Store directory</div><div class="set-desc">Relative to the document. Use {name} for the document name.</div></div>
                    <div class="set-ctl"><input type="text" class="set-input" id="set-imgdir" style="width:150px;" onchange="saveImgPrefs()"></div>
                </div>
                <div class="set-row">
                    <div><div class="set-label">Compress images</div><div class="set-desc">Re-encode large images before storing to save space.</div></div>
                    <div class="set-ctl"><label class="switch"><input type="checkbox" id="set-compress" onchange="onCompressToggle()"><span class="slider"></span></label></div>
                </div>
                <div class="set-row" id="row-quality">
                    <div><div class="set-label">Quality</div><div class="set-desc">Lower = smaller file.</div></div>
                    <div class="set-ctl"><div class="range-wrap">
                        <input type="range" min="30" max="100" id="set-quality" oninput="onQualityInput()" onchange="saveImgPrefs()">
                        <span id="quality-val" style="width:38px;">80%</span>
                    </div></div>
                </div>
                <div class="set-row" id="row-maxw">
                    <div><div class="set-label">Max width</div><div class="set-desc">Larger images are scaled down to this width (px). 0 = keep.</div></div>
                    <div class="set-ctl"><input type="number" min="0" max="8000" class="set-input num" id="set-maxw" onchange="saveImgPrefs()"> px</div>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- ── Unsaved-changes dialog ────────────────────────────────────────────── -->
<div class="overlay" id="confirm-overlay">
    <div id="confirm-box">
        <h3>Unsaved Changes</h3>
        <p id="confirm-msg">Your changes haven't been saved. Save before closing?</p>
        <div class="confirm-row">
            <button class="cbtn cbtn-cancel"  onclick="dlgCancel()">Cancel</button>
            <button class="cbtn cbtn-discard" onclick="dlgDiscard()">Discard</button>
            <button class="cbtn cbtn-save"    onclick="dlgSave()">Save</button>
        </div>
    </div>
</div>

<div id="busy"><div class="spin"></div><span id="busy-msg">Working…</span></div>

<script>
"use strict";
/* ════════════════════════════════════════════════════════════════════════
   Text — Typora-style editor for ArozOS
   ════════════════════════════════════════════════════════════════════════ */

// ── State ───────────────────────────────────────────────────────────────
var filepath        = "";
var filename        = "";
var isTxtMode       = false;      // false = markdown WYSIWYG, true = plain text
var isDark          = false;
var dirtyFlag       = false;
var dlgCallback     = null;
var pendingClose    = null;
var recordingAction = null;       // shortcut currently being re-bound

var rich  = document.getElementById("rich");
var plain = document.getElementById("plain");

// ── Settings (defaults) ─────────────────────────────────────────────────
var settings = {
    font: "system", fontSize: 16, lineHeight: "1.7",
    imgDir: "img/{name}", compress: false, quality: 80, maxWidth: 1600
};

var FONT_MAP = {
    system:  "-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif",
    serif:   "Georgia, 'Times New Roman', serif",
    mono:    "'SF Mono', 'Consolas', 'Courier New', monospace",
    georgia: "Georgia, serif",
    times:   "'Times New Roman', Times, serif"
};

// ── Shortcuts ───────────────────────────────────────────────────────────
var DEFAULT_KEYS = {
    save:"ctrl+s", bold:"ctrl+b", italic:"ctrl+i", strike:"ctrl+shift+x", inlineCode:"ctrl+e",
    h1:"ctrl+1", h2:"ctrl+2", h3:"ctrl+3", h4:"ctrl+4", h5:"ctrl+5", h6:"ctrl+6", paragraph:"ctrl+0",
    blockquote:"ctrl+shift+q", bulletList:"ctrl+shift+u", orderedList:"ctrl+shift+o",
    codeBlock:"ctrl+shift+k", link:"ctrl+k", image:"ctrl+shift+i", hr:"ctrl+shift+h"
};
var ACTIONS = {
    save:      { label:"Save",            fn:saveFile,                  md:false },
    bold:      { label:"Bold",            fn:actBold,                   md:true  },
    italic:    { label:"Italic",          fn:actItalic,                 md:true  },
    strike:    { label:"Strikethrough",   fn:actStrike,                 md:true  },
    inlineCode:{ label:"Inline code",     fn:actInlineCode,             md:true  },
    h1:        { label:"Heading 1",       fn:function(){setBlock("h1");}, md:true },
    h2:        { label:"Heading 2",       fn:function(){setBlock("h2");}, md:true },
    h3:        { label:"Heading 3",       fn:function(){setBlock("h3");}, md:true },
    h4:        { label:"Heading 4",       fn:function(){setBlock("h4");}, md:true },
    h5:        { label:"Heading 5",       fn:function(){setBlock("h5");}, md:true },
    h6:        { label:"Heading 6",       fn:function(){setBlock("h6");}, md:true },
    paragraph: { label:"Paragraph",       fn:function(){setBlock("p");},  md:true },
    blockquote:{ label:"Blockquote",      fn:actQuote,                  md:true  },
    bulletList:{ label:"Bullet list",     fn:actBullet,                 md:true  },
    orderedList:{label:"Numbered list",   fn:actNumber,                 md:true  },
    codeBlock: { label:"Code block",      fn:actCodeBlock,              md:true  },
    link:      { label:"Insert link",     fn:actLink,                   md:true  },
    image:     { label:"Insert image",    fn:function(){pickDeviceImage();}, md:true },
    hr:        { label:"Horizontal rule", fn:actHr,                     md:true  }
};
var keymap = JSON.parse(JSON.stringify(DEFAULT_KEYS));

// ── Turndown (HTML → Markdown) ──────────────────────────────────────────
var td = new TurndownService({
    headingStyle:"atx", codeBlockStyle:"fenced", bulletListMarker:"-",
    emDelimiter:"*", strongDelimiter:"**", hr:"---"
});
if (window.turndownPluginGfm) td.use(turndownPluginGfm.gfm);
// GFM plugin emits single-tilde strikethrough; marked only renders double-tilde
td.addRule("strike2", {
    filter:["del","s","strike"],
    replacement:function(content){ return "~~" + content + "~~"; }
});
td.addRule("relimg", {
    filter:"img",
    replacement:function(content, node){
        var alt = node.getAttribute("alt") || "";
        var src = node.getAttribute("data-rel") || node.getAttribute("src") || "";
        var ttl = node.getAttribute("title");
        return "![" + alt + "](" + mdLinkDest(src) + (ttl ? ' "'+ttl+'"' : "") + ")";
    }
});

// A markdown link/image destination containing spaces or parentheses must be
// wrapped in angle brackets, otherwise parsers (marked) treat it as plain text
// and the image never becomes an <img> — which is why such images appeared as
// literal "![](path)" markdown when exported. The raw path is kept inside the
// brackets so mediaURLFor() can still percent-encode it for the media endpoint.
function mdLinkDest(src){
    return /[\s()]/.test(src) ? "<" + src + ">" : src;
}

// ════════════════════════════════════════════════════════════════════════
// Init
// ════════════════════════════════════════════════════════════════════════
$(function(){
    if (document.execCommand) {
        try { document.execCommand("defaultParagraphSeparator", false, "p"); } catch(e){}
        try { document.execCommand("styleWithCSS", false, false); } catch(e){}
    }

    loadPrefs();

    var files = ao_module_loadInputFiles();
    if (files && files.length > 0){
        filepath = files[0].filepath;
        filename = files[0].filename;
        isTxtMode = !isMarkdownExt(filename);
        applyMode();
        loadFile();
    } else {
        isTxtMode = false;
        applyMode();
        updateTitle();
    }

    // editor events
    $("#rich").on("input",  onRichInput);
    $("#rich").on("keydown", onRichKeydown);
    $("#rich").on("paste",  onRichPaste);
    $("#rich").on("drop",   onRichDrop);
    $("#rich").on("dragover", function(e){ e.preventDefault(); });
    $(document).on("selectionchange", debounce(updateToolbarState, 80));

    $("#plain").on("input", function(){ markDirty(); updateStatBar(); });

    // global keydown for shortcuts
    $(document).on("keydown", globalKeydown);

    // device file input
    document.getElementById("device-file").addEventListener("change", onDeviceFileChosen);

    // close menus when clicking elsewhere
    document.addEventListener("click", function(e){
        if (!e.target.closest(".menu-wrap")) hideMenus();
    });
    // keep selection alive when clicking toolbar buttons
    document.getElementById("toolbar").addEventListener("mousedown", function(e){
        if (e.target.closest(".tb-btn") && !e.target.closest("select")) e.preventDefault();
    });

    buildKeyList();
    syncSettingsUI();
    applyTypography();
    updateStatBar();
});

function isMarkdownExt(name){
    var ext = (name.split(".").pop() || "").toLowerCase();
    return ext === "md" || ext === "markdown" || ext === "mdown" || ext === "mkd";
}

// ════════════════════════════════════════════════════════════════════════
// File load / save
// ════════════════════════════════════════════════════════════════════════
function loadFile(){
    $.get(ao_root + "media?file=" + encodeURIComponent(filepath) + "&t=" + Date.now(), function(data){
        if (typeof data !== "string") data = JSON.stringify(data, null, 2);
        setContent(data);
        dirtyFlag = false;
        updateTitle(); updateStatBar();
    }, "text").fail(function(){
        setStatus("Failed to load file", "error");
    });
}

function setContent(text){
    if (isTxtMode){
        plain.value = text;
    } else {
        rich.innerHTML = marked.parse(text || "");
        rewriteImageSrcs(rich);
        refreshEmptyState();
    }
}

function getContent(){
    if (isTxtMode) return plain.value;
    var html = rich.innerHTML.replace(//g, "");
    var md = td.turndown(html);
    return md.replace(/\n{3,}/g, "\n\n").replace(/^\s+|\s+$/g, "") + "\n";
}

function saveFile(){
    if (!filepath){
        var def = isTxtMode ? "Untitled.txt" : "Untitled.md";
        ao_module_openFileSelector(handleSaveAs, "user:/Desktop", "new", false, { defaultName: def });
        return;
    }
    doSave();
}
function handleSaveAs(fd){
    if (!fd || !fd.length) return;
    filepath = fd[0].filepath; filename = fd[0].filename;
    doSave();
}
function doSave(callback){
    var content = getContent();
    ao_module_agirun("Text/filesaver.js", { filepath: filepath, content: content }, function(data){
        if (data && data.error){
            setStatus("Save failed: " + data.error, "error");
        } else {
            dirtyFlag = false; updateTitle(); setStatus("Saved");
            if (callback) callback();
        }
    }, function(){ setStatus("Save failed", "error"); });
}

function openFile(){
    ao_module_openFileSelector(handleOpenFile, "user:/", "file", false, {
        filter: ["txt","md","markdown","csv","log","ini","conf","json","xml","html","css","js","py","sh","yaml","yml"]
    });
}
function handleOpenFile(fd){
    if (!fd || !fd.length) return;
    filepath = fd[0].filepath; filename = fd[0].filename;
    isTxtMode = !isMarkdownExt(filename);
    applyMode();
    dirtyFlag = false;
    loadFile();
}

// ════════════════════════════════════════════════════════════════════════
// Mode (markdown / plain text)
// ════════════════════════════════════════════════════════════════════════
function applyMode(){
    document.body.classList.toggle("mode-txt", isTxtMode);
    $("#stat-mode").text(isTxtMode ? "Plain text" : "Markdown");
    $("#mi-download-lbl").text(isTxtMode ? "Download .txt" : "Download .md");
    $("#seg-mode button").removeClass("active");
    $('#seg-mode button[data-mode="' + (isTxtMode ? "txt" : "md") + '"]').addClass("active");
    applyTypography();
}

// invoked from the settings segmented control — converts current content
function setMode(mode){
    var wantTxt = (mode === "txt");
    if (wantTxt === isTxtMode) return;
    var current = getContent();           // serialise from the current surface
    isTxtMode = wantTxt;
    applyMode();
    setContent(current);                  // re-hydrate into the new surface
    markDirty(); updateStatBar();
}

// ════════════════════════════════════════════════════════════════════════
// WYSIWYG editing
// ════════════════════════════════════════════════════════════════════════
function onRichInput(){
    markDirty();
    inlineAutoformat();
    refreshEmptyState();
    updateStatBar();
}

function refreshEmptyState(){
    var t = rich.textContent.replace(//g, "").trim();
    rich.classList.toggle("is-empty", t === "" && rich.children.length <= 1 && rich.querySelector("img,hr,table") === null);
}

function onRichKeydown(e){
    // block-level transforms triggered by Space / Enter (no modifier)
    if (e.ctrlKey || e.metaKey || e.altKey) return;
    if (e.key === " "){
        if (blockTransformOnSpace()) e.preventDefault();
    } else if (e.key === "Enter"){
        if (blockTransformOnEnter()) e.preventDefault();
    }
}

function getSel(){ return window.getSelection(); }

function currentBlock(){
    var sel = getSel();
    if (!sel.rangeCount) return null;
    var n = sel.getRangeAt(0).startContainer;
    if (n.nodeType === 3) n = n.parentNode;
    while (n && n !== rich){
        if (/^(P|H[1-6]|LI|BLOCKQUOTE|PRE|DIV)$/.test(n.tagName)) return n;
        n = n.parentNode;
    }
    return null;
}

// text in the current block, from its start to the caret
function textBeforeCaret(block){
    var sel = getSel();
    if (!sel.rangeCount) return "";
    var r = sel.getRangeAt(0);
    var pre = document.createRange();
    pre.selectNodeContents(block);
    try { pre.setEnd(r.startContainer, r.startOffset); } catch(err){ return ""; }
    return pre.toString();
}

function blockTransformOnSpace(){
    var block = currentBlock();
    if (!block || block.tagName === "PRE") return false;
    var pre = textBeforeCaret(block);
    var li = (block.tagName === "LI");

    if (/^#{1,6}$/.test(pre) && !li){
        clearMarkers(block, pre.length); changeBlockTag(block, "h" + pre.length); return true;
    }
    if (pre === ">" && !li){
        clearMarkers(block, 1); wrapBlockquote(block); return true;
    }
    if ((pre === "-" || pre === "*" || pre === "+") && !li){
        clearMarkers(block, 1); makeList(block, false); return true;
    }
    if (/^\d+\.$/.test(pre) && !li){
        clearMarkers(block, pre.length); makeList(block, true); return true;
    }
    return false;
}

// turn a block into a single-item list, merging with an adjacent list of the same kind
function makeList(block, ordered){
    var tag = ordered ? "ol" : "ul";
    var li = document.createElement("li");
    while (block.firstChild) li.appendChild(block.firstChild);
    if (!li.firstChild) li.appendChild(document.createElement("br"));
    var prev = block.previousElementSibling;
    if (prev && prev.tagName.toLowerCase() === tag){
        prev.appendChild(li);
        block.parentNode.removeChild(block);
    } else {
        var list = document.createElement(tag);
        list.appendChild(li);
        block.parentNode.replaceChild(list, block);
    }
    placeCaretAtStart(li); markDirty();
}

function blockTransformOnEnter(){
    var block = currentBlock();
    if (!block) return false;
    var pre = textBeforeCaret(block).trim();
    var whole = block.textContent.trim();

    if (block.tagName !== "PRE" && whole === "```"){
        block.textContent = ""; insertCodeBlockAt(block); return true;
    }
    if (block.tagName !== "PRE" && (whole === "---" || whole === "***" || whole === "___")){
        var hr = document.createElement("hr");
        var p  = document.createElement("p"); p.appendChild(document.createElement("br"));
        block.parentNode.replaceChild(p, block);
        p.parentNode.insertBefore(hr, p);
        placeCaretAtStart(p); markDirty(); return true;
    }
    // pressing Enter at the end of a heading starts a normal paragraph
    if (/^H[1-6]$/.test(block.tagName) && pre === whole){
        var np = document.createElement("p"); np.appendChild(document.createElement("br"));
        if (block.nextSibling) block.parentNode.insertBefore(np, block.nextSibling);
        else block.parentNode.appendChild(np);
        placeCaretAtStart(np); markDirty(); return true;
    }
    return false;
}

// remove the first `count` characters (markdown markers) from a block
function clearMarkers(block, count){
    var r = document.createRange();
    r.selectNodeContents(block);
    var walker = document.createTreeWalker(block, NodeFilter.SHOW_TEXT, null);
    var first = walker.nextNode();
    if (first){
        r.setStart(first, 0);
        r.setEnd(first, Math.min(count, first.data.length));
        r.deleteContents();
    } else {
        block.textContent = "";
    }
}

function changeBlockTag(block, tag){
    var nb = document.createElement(tag);
    while (block.firstChild) nb.appendChild(block.firstChild);
    if (!nb.firstChild) nb.appendChild(document.createElement("br"));
    block.parentNode.replaceChild(nb, block);
    placeCaretAtStart(nb); markDirty();
}

function wrapBlockquote(block){
    var bq = document.createElement("blockquote");
    var p  = document.createElement("p");
    while (block.firstChild) p.appendChild(block.firstChild);
    if (!p.firstChild) p.appendChild(document.createElement("br"));
    bq.appendChild(p);
    block.parentNode.replaceChild(bq, block);
    placeCaretAtStart(p); markDirty();
}

function insertCodeBlockAt(block){
    var pre = document.createElement("pre");
    var code = document.createElement("code");
    code.appendChild(document.createTextNode(""));
    pre.appendChild(code);
    block.parentNode.replaceChild(pre, block);
    var r = document.createRange();
    r.setStart(code.firstChild, 1); r.collapse(true);
    var s = getSel(); s.removeAllRanges(); s.addRange(r);
    markDirty();
}

function placeCaretAtStart(el){
    var r = document.createRange();
    r.setStart(el, 0); r.collapse(true);
    var s = getSel(); s.removeAllRanges(); s.addRange(r);
    rich.focus();
}

// inline autoformat: **bold** *italic* `code` ~~strike~~
function inlineAutoformat(){
    var sel = getSel();
    if (!sel.rangeCount || !sel.isCollapsed) return;
    var node = sel.getRangeAt(0).startContainer;
    if (node.nodeType !== 3) return;
    var offset = sel.getRangeAt(0).startOffset;
    var text = node.data.substring(0, offset);

    var patterns = [
        { re:/\*\*([^*\s][^*]*?)\*\*$/,                tag:"strong" },
        { re:/__([^_\s][^_]*?)__$/,                    tag:"strong" },
        { re:/`([^`]+?)`$/,                            tag:"code"   },
        { re:/~~([^~\s][^~]*?)~~$/,                    tag:"del"    },
        { re:/(?<![*\w])\*([^*\s][^*]*?)\*$/,          tag:"em"     },
        { re:/(?<![_\w])_([^_\s][^_]*?)_$/,            tag:"em"     }
    ];
    for (var i = 0; i < patterns.length; i++){
        var m = patterns[i].re.exec(text);
        if (m){
            applyInline(node, offset - m[0].length, offset, m[1], patterns[i].tag);
            return;
        }
    }
}

function applyInline(node, start, end, inner, tag){
    var r = document.createRange();
    r.setStart(node, start); r.setEnd(node, end);
    r.deleteContents();
    var el = document.createElement(tag);
    el.textContent = inner;
    r.insertNode(el);
    // exit the formatted span with a zero-width spacer so typing continues plain
    var after = document.createTextNode("");
    el.parentNode.insertBefore(after, el.nextSibling);
    var nr = document.createRange();
    nr.setStart(after, 1); nr.collapse(true);
    var s = getSel(); s.removeAllRanges(); s.addRange(nr);
    markDirty();
}

// ── Toolbar actions ─────────────────────────────────────────────────────
function exec(cmd, val){
    rich.focus();
    document.execCommand(cmd, false, val || null);
    markDirty(); updateStatBar(); updateToolbarState();
}
function actBold(){   if(isTxtMode) return; exec("bold"); }
function actItalic(){ if(isTxtMode) return; exec("italic"); }
function actStrike(){ if(isTxtMode) return; exec("strikeThrough"); }
function actBullet(){ if(isTxtMode) return; exec("insertUnorderedList"); }
function actNumber(){ if(isTxtMode) return; exec("insertOrderedList"); }
function actInlineCode(){ if(isTxtMode) return; wrapSelection("code"); }
function actQuote(){
    if(isTxtMode) return;
    var b = currentBlock();
    if (b && b.closest("blockquote")){ exec("formatBlock", "p"); }
    else { exec("formatBlock", "blockquote"); }
}
function actCodeBlock(){
    if(isTxtMode) return;
    var b = currentBlock(); if (!b) { rich.focus(); b = currentBlock(); }
    if (b) insertCodeBlockAt(b);
}
function actHr(){
    if(isTxtMode) return;
    rich.focus();
    document.execCommand("insertHTML", false, "<hr><p><br></p>");
    markDirty();
}
function actLink(){
    if(isTxtMode) return;
    var url = prompt("Link URL:", "https://");
    if (!url) return;
    rich.focus();
    var sel = getSel();
    if (sel.rangeCount && !sel.isCollapsed){
        exec("createLink", url);
    } else {
        document.execCommand("insertHTML", false, '<a href="'+escapeAttr(url)+'">'+escapeHtml(url)+'</a>');
        markDirty();
    }
}
function setBlock(tag){
    if(isTxtMode) return;
    exec("formatBlock", tag);
}
function onHeadingSelect(){
    setBlock($("#sel-head").val());
}

function wrapSelection(tag){
    rich.focus();
    var sel = getSel();
    if (!sel.rangeCount) return;
    var r = sel.getRangeAt(0);
    var el = document.createElement(tag);
    if (r.collapsed){
        el.appendChild(document.createTextNode(""));
        r.insertNode(el);
        var nr = document.createRange(); nr.setStart(el.firstChild, 1); nr.collapse(true);
        sel.removeAllRanges(); sel.addRange(nr);
    } else {
        el.appendChild(r.extractContents());
        r.insertNode(el);
    }
    markDirty();
}

function updateToolbarState(){
    if (isTxtMode) return;
    if (!rich.contains(getSel().anchorNode)) return;
    try {
        $("#btn-bold").toggleClass("active", document.queryCommandState("bold"));
        $("#btn-italic").toggleClass("active", document.queryCommandState("italic"));
        $("#btn-strike").toggleClass("active", document.queryCommandState("strikeThrough"));
    } catch(e){}
    var b = currentBlock();
    var tag = b ? b.tagName.toLowerCase() : "p";
    if (!/^h[1-6]$/.test(tag)) tag = "p";
    $("#sel-head").val(tag);
    $("#btn-code").toggleClass("active", !!(getSel().anchorNode && getSel().anchorNode.parentNode && getSel().anchorNode.parentNode.closest("code")));
}

// ════════════════════════════════════════════════════════════════════════
// Shortcuts
// ════════════════════════════════════════════════════════════════════════
function comboFromEvent(e){
    var parts = [];
    if (e.ctrlKey || e.metaKey) parts.push("ctrl");
    if (e.shiftKey) parts.push("shift");
    if (e.altKey)   parts.push("alt");
    var k = e.key;
    if (k === " ") k = "space";
    else if (k.length === 1) k = k.toLowerCase();
    else k = k.toLowerCase();
    if (["control","shift","alt","meta"].indexOf(k) >= 0) return null;
    parts.push(k);
    return parts.join("+");
}

function globalKeydown(e){
    if (recordingAction){ recordKey(e); return; }
    if ($("#settings-overlay").hasClass("show")) {
        if (e.key === "Escape") closeSettings();
        return;
    }
    var combo = comboFromEvent(e);
    if (!combo) return;
    for (var action in keymap){
        if (keymap[action] === combo){
            var def = ACTIONS[action];
            if (!def) continue;
            if (def.md && isTxtMode) continue;    // markdown-only action in txt mode
            e.preventDefault();
            def.fn();
            return;
        }
    }
}

function prettyCombo(c){
    return c.split("+").map(function(p){
        if (p === "ctrl")  return "Ctrl";
        if (p === "shift") return "Shift";
        if (p === "alt")   return "Alt";
        if (p === "space") return "Space";
        return p.length === 1 ? p.toUpperCase() : p.charAt(0).toUpperCase() + p.slice(1);
    }).join(" + ");
}

function buildKeyList(){
    var html = "";
    for (var action in ACTIONS){
        html += '<div class="key-row"><span class="key-name">' + escapeHtml(ACTIONS[action].label) +
                '</span><button class="key-cap" data-action="' + action + '" onclick="startRecord(\'' + action + '\')">' +
                escapeHtml(prettyCombo(keymap[action] || "")) + '</button></div>';
    }
    document.getElementById("keys-list").innerHTML = html;
}

function startRecord(action){
    if (recordingAction){
        $('.key-cap[data-action="'+recordingAction+'"]').removeClass("recording")
            .text(prettyCombo(keymap[recordingAction]));
    }
    recordingAction = action;
    $('.key-cap[data-action="'+action+'"]').addClass("recording").text("Press keys…");
}

function recordKey(e){
    e.preventDefault();
    if (e.key === "Escape"){
        $('.key-cap[data-action="'+recordingAction+'"]').removeClass("recording")
            .text(prettyCombo(keymap[recordingAction]));
        recordingAction = null;
        return;
    }
    var combo = comboFromEvent(e);
    if (!combo || ["ctrl","shift","alt"].indexOf(combo) >= 0) return; // wait for a real key
    // free the combo from any other action
    for (var a in keymap){ if (keymap[a] === combo && a !== recordingAction) keymap[a] = ""; }
    keymap[recordingAction] = combo;
    recordingAction = null;
    savePrefs();
    buildKeyList();
}

function resetKeys(){
    keymap = JSON.parse(JSON.stringify(DEFAULT_KEYS));
    savePrefs(); buildKeyList();
}

// ════════════════════════════════════════════════════════════════════════
// Images
// ════════════════════════════════════════════════════════════════════════
function docDir(){
    var i = filepath.lastIndexOf("/");
    return i < 0 ? "" : filepath.substring(0, i);
}
function docName(){
    var n = filename.replace(/\.[^.]+$/, "");
    return n || "document";
}
function relDir(){
    return settings.imgDir.replace(/\{name\}/g, docName()).replace(/^\.?\/+/, "");
}
function mediaURLFor(rel){
    rel = rel.replace(/^\.?\/+/, "");
    return ao_root + "media?file=" + encodeURIComponent(docDir() + "/" + rel);
}
function rewriteImageSrcs(root){
    if (!filepath) return;
    $(root).find("img").each(function(){
        var src = this.getAttribute("src") || "";
        if (/^(https?:|data:|blob:)/i.test(src) || src.indexOf("media?file=") >= 0) return;
        var rel = src.replace(/^\.?\/+/, "");
        this.setAttribute("data-rel", rel);
        this.setAttribute("src", mediaURLFor(rel));
    });
}
function makeImgName(orig, forceExt){
    var base = (orig || "image").replace(/\.[^.]+$/, "").replace(/[^a-zA-Z0-9_\-]+/g, "_").substr(0, 40) || "image";
    var ext  = forceExt || ((orig || "").split(".").pop() || "png").toLowerCase();
    var ts   = Date.now().toString(36);
    return base + "-" + ts + "." + ext;
}

// ensure the image folder exists on the server, then run cb(reldir)
function ensureImgDir(cb){
    if (!filepath){
        alert("Please save the document first — images are stored in a folder next to it.");
        return;
    }
    var rel = relDir();
    ao_module_agirun("Text/imgtool.agi", { action:"mkdir", docpath:filepath, reldir:rel }, function(data){
        if (data && data.error){ setStatus("Image folder error: " + data.error, "error"); return; }
        cb(rel);
    }, function(){ setStatus("Could not prepare image folder", "error"); });
}

function pickDeviceImage(){
    if (isTxtMode) return;
    if (!filepath){ alert("Please save the document first."); return; }
    document.getElementById("device-file").click();
}
function onDeviceFileChosen(e){
    var file = e.target.files[0];
    e.target.value = "";
    if (!file) return;
    ensureImgDir(function(rel){
        prepareBlob(file, function(blob, ext){
            var fname = makeImgName(file.name, ext);
            setStatus("Uploading image…");
            ao_module_uploadFile(new File([blob], fname), docDir() + "/" + rel, function(){
                insertImage(rel + "/" + fname, docName());
                setStatus("Image inserted");
            }, undefined, function(){ setStatus("Image upload failed", "error"); });
        });
    });
}

// client-side compression via canvas (only when enabled)
function prepareBlob(file, cb){
    if (!settings.compress || !/^image\//.test(file.type) || file.type === "image/gif"){
        cb(file, (file.name.split(".").pop() || "png").toLowerCase());
        return;
    }
    var img = new Image();
    img.onload = function(){
        var w = img.naturalWidth, h = img.naturalHeight;
        var maxW = settings.maxWidth;
        if (maxW > 0 && w > maxW){ h = Math.round(h * (maxW / w)); w = maxW; }
        var c = document.createElement("canvas");
        c.width = w; c.height = h;
        c.getContext("2d").drawImage(img, 0, 0, w, h);
        c.toBlob(function(blob){
            URL.revokeObjectURL(img.src);
            if (blob) cb(blob, "jpg");
            else cb(file, (file.name.split(".").pop() || "png").toLowerCase());
        }, "image/jpeg", settings.quality / 100);
    };
    img.onerror = function(){ cb(file, (file.name.split(".").pop() || "png").toLowerCase()); };
    img.src = URL.createObjectURL(file);
}

function pickServerImage(){
    if (isTxtMode) return;
    if (!filepath){ alert("Please save the document first."); return; }
    ao_module_openFileSelector(handleServerImage, "user:/", "file", false, {
        filter: ["jpg","jpeg","png","gif","webp","bmp","svg"]
    });
}
function handleServerImage(fd){
    if (!fd || !fd.length) return;
    var src = fd[0].filepath, name = fd[0].filename;
    var rel = relDir();
    var dest = makeImgName(name, settings.compress ? "jpg" : null);
    setStatus("Importing image…");
    ao_module_agirun("Text/imgtool.agi", {
        action:"import", docpath:filepath, reldir:rel, src:src, destname:dest,
        compress: settings.compress ? "true" : "false", maxwidth: settings.maxWidth
    }, function(data){
        if (data && data.error){ setStatus("Import failed: " + data.error, "error"); return; }
        insertImage(data.rel || (rel + "/" + dest), docName());
        setStatus("Image inserted");
    }, function(){ setStatus("Image import failed", "error"); });
}

function insertImageByUrl(){
    if (isTxtMode) return;
    var url = prompt("Image URL:", "https://");
    if (!url) return;
    rich.focus();
    document.execCommand("insertHTML", false, '<img src="'+escapeAttr(url)+'" alt="">');
    markDirty();
}

// insert an image referencing a path relative to the document
function insertImage(rel, alt){
    if (isTxtMode){
        insertAtTextarea(plain, "![" + (alt||"") + "](" + mdLinkDest(rel) + ")");
        markDirty(); return;
    }
    rich.focus();
    var html = '<img src="'+escapeAttr(mediaURLFor(rel))+'" data-rel="'+escapeAttr(rel)+'" alt="'+escapeAttr(alt||"")+'">';
    document.execCommand("insertHTML", false, html);
    refreshEmptyState(); markDirty();
}

function insertAtTextarea(ta, text){
    var s = ta.selectionStart, e = ta.selectionEnd;
    ta.value = ta.value.substring(0, s) + text + ta.value.substring(e);
    ta.selectionStart = ta.selectionEnd = s + text.length;
    ta.focus();
}

// paste / drop images straight into the editor
function onRichPaste(e){
    var items = (e.originalEvent || e).clipboardData && (e.originalEvent || e).clipboardData.items;
    if (!items) return;
    for (var i = 0; i < items.length; i++){
        if (items[i].type && items[i].type.indexOf("image") === 0){
            var file = items[i].getAsFile();
            if (file){ e.preventDefault(); handleDroppedImage(file); return; }
        }
    }
}
function onRichDrop(e){
    var dt = (e.originalEvent || e).dataTransfer;
    if (dt && dt.files && dt.files.length && /^image\//.test(dt.files[0].type)){
        e.preventDefault(); handleDroppedImage(dt.files[0]);
    }
}
function handleDroppedImage(file){
    if (!filepath){ alert("Please save the document first to store pasted images."); return; }
    ensureImgDir(function(rel){
        prepareBlob(file, function(blob, ext){
            var fname = makeImgName(file.name || "pasted.png", ext);
            setStatus("Uploading image…");
            ao_module_uploadFile(new File([blob], fname), docDir() + "/" + rel, function(){
                insertImage(rel + "/" + fname, docName());
                setStatus("Image inserted");
            }, undefined, function(){ setStatus("Image upload failed", "error"); });
        });
    });
}

// ════════════════════════════════════════════════════════════════════════
// Export
// ════════════════════════════════════════════════════════════════════════
function renderedHTML(){
    if (isTxtMode) return "<pre>" + escapeHtml(plain.value) + "</pre>";
    return marked.parse(getContent());
}

// collect the CSS that styles .md-content so exports match the editor
function exportCSS(){
    var bg   = getCss("--editor-bg"), text = getCss("--text"), accent = getCss("--accent");
    var code = getCss("--code-bg"),   sep = getCss("--sep"), quote = getCss("--quote-bdr");
    var tbl  = getCss("--table-bdr"), text2 = getCss("--text2");
    return [
        "body{margin:0;background:"+bg+";color:"+text+";font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;line-height:"+settings.lineHeight+";}",
        ".md-content{max-width:820px;margin:0 auto;padding:48px 40px;font-size:"+settings.fontSize+"px;word-wrap:break-word;}",
        ".md-content h1,.md-content h2,.md-content h3,.md-content h4,.md-content h5,.md-content h6{font-weight:700;line-height:1.3;margin:1.4em 0 .6em;}",
        ".md-content h1{font-size:2em;border-bottom:1px solid "+sep+";padding-bottom:.25em;}",
        ".md-content h2{font-size:1.6em;border-bottom:1px solid "+sep+";padding-bottom:.2em;}",
        ".md-content h3{font-size:1.3em;} .md-content h4{font-size:1.1em;} .md-content h6{color:"+text2+";}",
        ".md-content p{margin:.55em 0;} .md-content a{color:"+accent+";text-decoration:none;}",
        ".md-content ul,.md-content ol{margin:.5em 0;padding-left:1.7em;} .md-content li{margin:.25em 0;}",
        ".md-content blockquote{margin:.8em 0;padding:.2em 1em;color:"+text2+";border-left:3px solid "+quote+";border-radius:0 6px 6px 0;}",
        ".md-content code{font-family:'SF Mono',Consolas,monospace;font-size:.88em;background:"+code+";padding:.15em .4em;border-radius:4px;}",
        ".md-content pre{margin:.8em 0;padding:14px 16px;background:"+code+";border-radius:8px;overflow-x:auto;}",
        ".md-content pre code{background:none;padding:0;} .md-content hr{border:none;border-top:1px solid "+sep+";margin:1.6em 0;}",
        ".md-content img{max-width:100%;border-radius:6px;}",
        ".md-content table{border-collapse:collapse;margin:.8em 0;} .md-content th,.md-content td{border:1px solid "+tbl+";padding:6px 12px;} .md-content th{background:"+code+";}"
    ].join("\n");
}
function getCss(v){ return getComputedStyle(document.body).getPropertyValue(v).trim(); }

// fetch a same-origin image and return a data URL (for self-contained export)
function inlineImage(url){
    return new Promise(function(resolve){
        var xhr = new XMLHttpRequest();
        xhr.open("GET", url, true); xhr.responseType = "blob";
        xhr.onload = function(){
            if (xhr.status === 200){
                var fr = new FileReader();
                fr.onloadend = function(){ resolve(fr.result); };
                fr.onerror = function(){ resolve(url); };
                fr.readAsDataURL(xhr.response);
            } else resolve(url);
        };
        xhr.onerror = function(){ resolve(url); };
        xhr.send();
    });
}

// build an offscreen DOM with all images inlined as data URLs
function buildExportContainer(){
    var div = document.createElement("div");
    div.className = "md-content";
    div.innerHTML = renderedHTML();
    // resolve relative srcs to media URLs first
    $(div).find("img").each(function(){
        var rel = this.getAttribute("data-rel");
        var src = this.getAttribute("src") || "";
        if (rel) this.setAttribute("src", mediaURLFor(rel));
        else if (!/^(https?:|data:)/i.test(src) && filepath) this.setAttribute("src", mediaURLFor(src));
    });
    var imgs = Array.prototype.slice.call(div.querySelectorAll("img"));
    return Promise.all(imgs.map(function(im){
        return inlineImage(im.getAttribute("src")).then(function(d){ im.setAttribute("src", d); });
    })).then(function(){ return div; });
}

function downloadBlob(blob, name){
    var a = document.createElement("a");
    a.href = URL.createObjectURL(blob);
    a.download = name;
    document.body.appendChild(a); a.click();
    setTimeout(function(){ URL.revokeObjectURL(a.href); a.remove(); }, 1000);
}

function exportHTML(){
    showBusy("Building HTML…");
    buildExportContainer().then(function(div){
        var title = escapeHtml(docName());
        var doc = "<!DOCTYPE html>\n<html><head><meta charset=\"utf-8\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n<title>" +
                  title + "</title>\n<style>\n" + exportCSS() + "\n</style></head>\n<body>\n" +
                  div.outerHTML + "\n</body></html>";
        downloadBlob(new Blob([doc], { type:"text/html" }), docName() + ".html");
        hideBusy(); setStatus("Exported HTML");
    }).catch(function(err){ hideBusy(); setStatus("HTML export failed", "error"); console.error(err); });
}

// ── Download the raw document (.md / .txt), zipping it with its images ─────
function collectDocImages(){
    var seen = {}, out = [];
    function add(p){
        if (!p) return;
        p = p.replace(/^\.?\/+/, "");
        if (/^(https?:|data:)/i.test(p) || p.indexOf("media?file=") >= 0) return;
        if (!seen[p]){ seen[p] = 1; out.push(p); }
    }
    if (isTxtMode){
        // capture both bare and angle-bracket-wrapped destinations (the latter
        // is used when a path contains spaces)
        var re = /!\[[^\]]*\]\(\s*(?:<([^>]+)>|([^)\s]+))/g, m;
        while ((m = re.exec(plain.value))) add(m[1] || m[2]);
    } else {
        $(rich).find("img").each(function(){
            add(this.getAttribute("data-rel") || this.getAttribute("src"));
        });
    }
    return out;
}

function exportDocument(){
    var content = getContent();
    var ext  = isTxtMode ? "txt" : "md";
    var name = docName() + "." + ext;
    var imgs = collectDocImages();

    if (imgs.length === 0){
        downloadBlob(new Blob([content], { type: isTxtMode ? "text/plain" : "text/markdown" }), name);
        setStatus("Downloaded " + name);
        return;
    }
    if (!filepath){ alert("Please save the document first so its images can be bundled."); return; }

    showBusy("Bundling document…");
    ao_module_agirun("Text/export.agi", {
        action:"zip", docpath:filepath, name:name, content:content, images:JSON.stringify(imgs)
    }, function(data){
        if (!data || data.error){ hideBusy(); setStatus("Export failed: " + ((data && data.error) || "unknown"), "error"); return; }
        var url = ao_root + "media/download/?file=" + encodeURIComponent(data.zip);
        fetch(url).then(function(r){ return r.blob(); }).then(function(blob){
            downloadBlob(blob, docName() + ".zip");
            hideBusy(); setStatus("Downloaded " + docName() + ".zip");
            // best-effort temp cleanup
            ao_module_agirun("Text/export.agi", { action:"cleanup", zip:data.zip, workdir:data.workdir }, function(){}, function(){});
        }).catch(function(){ hideBusy(); setStatus("Export download failed", "error"); });
    }, function(){ hideBusy(); setStatus("Export failed", "error"); });
}

// ════════════════════════════════════════════════════════════════════════
// Text-based PDF export (pdf-lib): real selectable text + embedded images.
// Mirrors the Productivity PDF Editor — standard fonts for encodable text,
// rasterise fallback for glyphs the standard fonts can't encode (e.g. CJK).
// ════════════════════════════════════════════════════════════════════════
function exportPDF(){
    showBusy("Rendering PDF…");
    pdfBuild().then(function(bytes){
        downloadBlob(new Blob([bytes], { type:"application/pdf" }), docName() + ".pdf");
        hideBusy(); setStatus("Exported PDF");
    }).catch(function(err){ hideBusy(); setStatus("PDF export failed", "error"); console.error(err); });
}

var _measureCtx = null;
function measureCtx(){ if (!_measureCtx) _measureCtx = document.createElement("canvas").getContext("2d"); return _measureCtx; }

function PDF_COLORS(){
    var rgb = PDFLib.rgb;
    return {
        text:   rgb(0.16, 0.18, 0.22),
        head:   rgb(0.10, 0.12, 0.16),
        accent: rgb(0.16, 0.40, 0.82),
        muted:  rgb(0.45, 0.49, 0.57),
        code:   rgb(0.20, 0.22, 0.30),
        codebg: rgb(0.96, 0.97, 0.99),
        rule:   rgb(0.85, 0.87, 0.91),
        quote:  rgb(0.74, 0.78, 0.85),
        tline:  rgb(0.80, 0.83, 0.88),
        thead:  rgb(0.95, 0.96, 0.98)
    };
}

function assignStyle(a, b){ var o = {}; for (var k in a) o[k] = a[k]; for (var k in b) o[k] = b[k]; return o; }
function mkRun(text, s){ s = s || {}; return { text: text, bold:!!s.bold, italic:!!s.italic, mono:!!s.mono, code:!!s.code, link:!!s.link, strike:!!s.strike }; }
function decodeEntities(s){ var ta = document.createElement("textarea"); ta.innerHTML = s || ""; return ta.value; }
function stripTags(s){ return (s || "").replace(/<[^>]*>/g, ""); }

// flatten marked inline tokens into styled runs
function inlineRuns(tokens, style){
    style = style || {};
    var out = [];
    (tokens || []).forEach(function(t){
        switch (t.type){
            case "text":
                if (t.tokens && t.tokens.length) out = out.concat(inlineRuns(t.tokens, style));
                else out.push(mkRun(decodeEntities(t.text), style));
                break;
            case "strong":   out = out.concat(inlineRuns(t.tokens, assignStyle(style, { bold:true }))); break;
            case "em":       out = out.concat(inlineRuns(t.tokens, assignStyle(style, { italic:true }))); break;
            case "del":      out = out.concat(inlineRuns(t.tokens, assignStyle(style, { strike:true }))); break;
            case "codespan": out.push(mkRun(decodeEntities(t.text), assignStyle(style, { mono:true, code:true }))); break;
            case "link":     out = out.concat(inlineRuns(t.tokens, assignStyle(style, { link:true }))); break;
            case "image":    out.push({ image:true, href:t.href, alt:t.text || "" }); break;
            case "br":       out.push({ brk:true }); break;
            case "escape":   out.push(mkRun(t.text, style)); break;
            case "html":     out.push(mkRun(stripTags(t.text), style)); break;
            default:         if (t.text) out.push(mkRun(decodeEntities(t.text), style)); break;
        }
    });
    return out;
}

function pdfPickFont(P, run){
    if (run.mono) return run.bold ? P.fonts.monoBold : P.fonts.mono;
    if (run.bold && run.italic) return P.fonts.bi;
    if (run.bold)   return P.fonts.bold;
    if (run.italic) return P.fonts.ital;
    return P.fonts.reg;
}

function pdfNewCursor(P){
    var c = { pageW:595.28, pageH:841.89, margin:56, y:0, page:null };
    c.page = P.pdf.addPage([c.pageW, c.pageH]);
    c.y = c.pageH - c.margin;
    return c;
}
function pdfEnsure(P, h){
    var c = P.cur;
    if (c.y - h < c.margin){ c.page = P.pdf.addPage([c.pageW, c.pageH]); c.y = c.pageH - c.margin; }
}
function pdfRule(P){
    var c = P.cur;
    c.page.drawLine({ start:{x:c.margin, y:c.y}, end:{x:c.pageW - c.margin, y:c.y}, thickness:0.7, color:P.col.rule });
}
function pdfColToCss(col){
    if (!col) return "#2a2e38";
    return "rgb(" + Math.round((col.red||0)*255) + "," + Math.round((col.green||0)*255) + "," + Math.round((col.blue||0)*255) + ")";
}

// split text for wrapping: whole words, runs of spaces, and individual CJK chars
function tokenizeWrap(text){
    return (text || "").match(/[　-〿぀-ヿ㐀-䶿一-鿿豈-﫿＀-￯가-힯]|\s+|[^\s　-〿぀-ヿ㐀-䶿一-鿿豈-﫿＀-￯가-힯]+/g) || [];
}

function canvasToEmbeddedPng(pdf, canvas){
    return new Promise(function(res, rej){
        canvas.toBlob(function(b){
            if (!b){ rej(new Error("canvas")); return; }
            var fr = new FileReader();
            fr.onload = function(){ pdf.embedPng(new Uint8Array(fr.result)).then(res, rej); };
            fr.onerror = rej;
            fr.readAsArrayBuffer(b);
        }, "image/png");
    });
}

// draw one word as real text; on encoding failure, rasterise it and place as image
function pdfDrawWord(P, font, word, size, x, color, strike){
    var c = P.cur;
    try {
        var w = font.widthOfTextAtSize(word, size);
        c.page.drawText(word, { x:x, y:c.y - size*0.80, size:size, font:font, color:color });
        if (strike) c.page.drawLine({ start:{x:x, y:c.y - size*0.45}, end:{x:x + w, y:c.y - size*0.45}, thickness:0.6, color:color });
        return Promise.resolve(w);
    } catch (e){
        return pdfDrawRasterWord(P, word, size, x, color);
    }
}
function pdfDrawRasterWord(P, word, size, x, color){
    var c = P.cur, k = 3;
    var ctx = measureCtx(); ctx.font = size + "px sans-serif";
    var wPt = Math.max(1, ctx.measureText(word).width), hPt = size * 1.2;
    var cv = document.createElement("canvas");
    cv.width = Math.ceil(wPt * k); cv.height = Math.ceil(hPt * k);
    var cx = cv.getContext("2d");
    cx.scale(k, k); cx.fillStyle = pdfColToCss(color); cx.textBaseline = "alphabetic"; cx.font = size + "px sans-serif";
    cx.fillText(word, 0, size * 0.92);
    return canvasToEmbeddedPng(P.pdf, cv).then(function(png){
        c.page.drawImage(png, { x:x, y:c.y - size, width:wPt, height:hPt });
        return wPt;
    });
}

// flow styled runs with word wrapping; returns a promise (images/raster are async)
function pdfFlow(P, runs, startX, fontSize, lineH, baseColor){
    var c = P.cur, maxX = c.pageW - c.margin, x = startX;
    pdfEnsure(P, lineH);
    function nl(){ c.y -= lineH; x = startX; pdfEnsure(P, lineH); }
    var i = 0, words = [], wi = 0, run = null, font = null, size = 0, color = null;

    function nextRun(){
        if (i >= runs.length) return null;
        return runs[i++];
    }
    function step(){
        // advance through words of the current run
        while (run && wi < words.length){
            var word = words[wi++];
            if (/^\s+$/.test(word)){ if (x === startX) continue; word = " "; }
            var ww;
            try { ww = font.widthOfTextAtSize(word, size); }
            catch (e){ var ctx = measureCtx(); ctx.font = size + "px sans-serif"; ww = ctx.measureText(word).width; }
            if (word !== " " && x + ww > maxX && x > startX) nl();
            var px = x;
            x += ww;
            return pdfDrawWord(P, font, word, size, px, color, run.strike).then(function(realW){
                x = px + realW; return step();
            });
        }
        // current run done — get next
        run = nextRun();
        if (!run){ c.y -= lineH; return Promise.resolve(); }   // consume final line
        if (run.brk){ nl(); return step(); }
        if (run.image){
            if (x > startX){ c.y -= lineH; x = startX; }
            return pdfDrawImage(P, run.href, startX).then(step);
        }
        font  = pdfPickFont(P, run);
        size  = run.mono ? fontSize * 0.94 : fontSize;
        color = run.link ? P.col.accent : (run.code ? P.col.code : baseColor);
        words = tokenizeWrap(run.text); wi = 0;
        return step();
    }
    return step();
}

function fetchBytes(url){
    return fetch(url).then(function(r){ if (!r.ok) throw new Error("HTTP " + r.status); return r.arrayBuffer(); })
                     .then(function(b){ return new Uint8Array(b); });
}
function pdfResolveSrc(href){
    if (/^(https?:|data:)/i.test(href)) return href;
    return filepath ? mediaURLFor(href) : href;
}
function pdfEmbedBytes(pdf, bytes){
    if (bytes[0] === 0x89 && bytes[1] === 0x50) return pdf.embedPng(bytes);
    if (bytes[0] === 0xFF && bytes[1] === 0xD8) return pdf.embedJpg(bytes);
    return new Promise(function(res, rej){       // gif/webp/svg/bmp → rasterise
        var im = new Image();
        im.onload = function(){
            var cv = document.createElement("canvas");
            cv.width = im.naturalWidth || 300; cv.height = im.naturalHeight || 150;
            cv.getContext("2d").drawImage(im, 0, 0);
            canvasToEmbeddedPng(pdf, cv).then(res, rej);
        };
        im.onerror = function(){ rej(new Error("image decode")); };
        im.src = URL.createObjectURL(new Blob([bytes]));
    });
}
function pdfDrawImage(P, href, startX){
    var c = P.cur;
    return fetchBytes(pdfResolveSrc(href)).then(function(bytes){ return pdfEmbedBytes(P.pdf, bytes); }).then(function(img){
        var natW = img.width, natH = img.height;
        var dispW = Math.min(natW, c.pageW - c.margin - startX), dispH = natH * (dispW / natW);
        var maxH = c.pageH - 2 * c.margin;
        if (dispH > maxH){ dispH = maxH; dispW = natW * (dispH / natH); }
        pdfEnsure(P, dispH + 8);
        c.page.drawImage(img, { x:startX, y:c.y - dispH, width:dispW, height:dispH });
        c.y -= dispH + 8;
    }).catch(function(){
        c.page.drawText("[image]", { x:startX, y:c.y - 11, size:11, font:P.fonts.ital, color:P.col.muted });
        c.y -= 18;
    });
}

function pdfHeading(P, token){
    var c = P.cur;
    var sizes = [23, 19, 16, 14, 12.5, 11.5], fs = sizes[(token.depth || 1) - 1] || 12;
    c.y -= fs * 0.8;
    return pdfFlow(P, inlineRuns(token.tokens || [{ type:"text", text:token.text }], { bold:true }), c.margin, fs, fs * 1.32, P.col.head)
        .then(function(){
            if ((token.depth || 1) <= 2){ c.y += 4; pdfEnsure(P, 6); pdfRule(P); c.y -= 8; }
            c.y -= fs * 0.25;
        });
}
function pdfParagraph(P, token){
    var c = P.cur; c.y -= 3;
    return pdfFlow(P, inlineRuns(token.tokens || [{ type:"text", text:token.text }], {}), c.margin, 11, 16.5, P.col.text)
        .then(function(){ c.y -= 4; });
}
function pdfHr(P){ var c = P.cur; c.y -= 8; pdfEnsure(P, 8); pdfRule(P); c.y -= 10; }

function pdfList(P, token, depth){
    var c = P.cur, indent = c.margin + depth * 18, idx = token.start || 1;
    var chain = Promise.resolve();
    token.items.forEach(function(item){
        var n = idx++;
        chain = chain.then(function(){
            pdfEnsure(P, 11 * 1.5);
            if (item.task){
                c.page.drawRectangle({ x:indent, y:c.y - 10, width:9, height:9, borderWidth:0.9, borderColor:P.col.muted, color: item.checked ? P.col.accent : undefined });
            } else if (token.ordered){
                try { c.page.drawText(n + ".", { x:indent, y:c.y - 11*0.80, size:11, font:P.fonts.reg, color:P.col.text }); } catch(e){}
            } else {
                c.page.drawCircle({ x:indent + 3, y:c.y - 7, size:1.7, color:P.col.text });
            }
            return pdfListItem(P, item, indent + 16, depth);
        });
    });
    return chain.then(function(){ c.y -= 3; });
}
function pdfListItem(P, item, startX, depth){
    var toks = item.tokens || [];
    if (toks.length === 0) return pdfFlow(P, inlineRuns([{ type:"text", text:item.text || "" }], {}), startX, 11, 16.5, P.col.text);
    var chain = Promise.resolve();
    toks.forEach(function(t){
        chain = chain.then(function(){
            if (t.type === "list")               return pdfList(P, t, depth + 1);
            if (t.type === "code")               return pdfCode(P, t, startX);
            if (t.type === "blockquote")         return pdfBlockquote(P, t);
            var rr = inlineRuns(t.tokens || [{ type:"text", text:t.text || "" }], {});
            return pdfFlow(P, rr, startX, 11, 16.5, P.col.text);
        });
    });
    return chain;
}
function pdfBlockquote(P, token){
    var c = P.cur; c.y -= 3;
    var startY = c.y, startPage = c.page, x = c.margin + 16;
    var chain = Promise.resolve();
    (token.tokens || []).forEach(function(t){
        chain = chain.then(function(){
            if (t.type === "list") return pdfList(P, t, 1);
            if (t.type === "code") return pdfCode(P, t, x);
            var rr = inlineRuns(t.tokens || [{ type:"text", text:t.text || "" }], {});
            return pdfFlow(P, rr, x, 11, 16.5, P.col.muted);
        });
    });
    return chain.then(function(){
        if (c.page === startPage) c.page.drawRectangle({ x:c.margin + 4, y:c.y + 6, width:2.5, height:Math.max(2, startY - c.y), color:P.col.quote });
        c.y -= 4;
    });
}
function pdfCode(P, token, startX){
    var c = P.cur; startX = startX || c.margin;
    var size = 9.5, lh = 12.5, pad = 8, font = P.fonts.mono;
    var charW = font.widthOfTextAtSize("m", size);
    var maxChars = Math.max(8, Math.floor((c.pageW - c.margin - startX - 2 * pad) / charW));
    var lines = [];
    (token.text || "").replace(/\n$/, "").split("\n").forEach(function(ln){
        if (ln.length <= maxChars) lines.push(ln);
        else for (var i = 0; i < ln.length; i += maxChars) lines.push(ln.substr(i, maxChars));
    });
    if (lines.length === 0) lines = [""];
    c.y -= 4;
    var chain = Promise.resolve();
    lines.forEach(function(txt){
        chain = chain.then(function(){
            pdfEnsure(P, lh);
            c.page.drawRectangle({ x:startX, y:c.y - lh + 2, width:c.pageW - c.margin - startX, height:lh, color:P.col.codebg });
            try { c.page.drawText(txt, { x:startX + pad, y:c.y - lh + 3.5, size:size, font:font, color:P.col.code }); return; }
            catch (e){ return pdfDrawRasterWord(P, txt, size, startX + pad, P.col.code).then(function(){}); }
        }).then(function(){ c.y -= lh; });
    });
    return chain.then(function(){ c.y -= 6; });
}
function pdfTable(P, token){
    var c = P.cur; c.y -= 4;
    var cols = (token.header && token.header.length) || 1;
    var colW = (c.pageW - 2 * c.margin) / cols, size = 10, pad = 5, rowH = 18;
    function fit(font, txt, maxW){
        try { if (font.widthOfTextAtSize(txt, size) <= maxW) return txt; } catch (e){ return txt; }
        var s = txt;
        while (s.length > 1){ s = s.slice(0, -1); try { if (font.widthOfTextAtSize(s + "…", size) <= maxW) return s + "…"; } catch (e){ break; } }
        return s;
    }
    function row(cells, header){
        pdfEnsure(P, rowH);
        var x = c.margin;
        for (var i = 0; i < cols; i++){
            var cell = cells[i] || { text:"" };
            if (header) c.page.drawRectangle({ x:x, y:c.y - rowH, width:colW, height:rowH, color:P.col.thead });
            c.page.drawRectangle({ x:x, y:c.y - rowH, width:colW, height:rowH, borderWidth:0.6, borderColor:P.col.tline });
            var f = header ? P.fonts.bold : P.fonts.reg;
            var txt = fit(f, decodeEntities(cell.text || ""), colW - 2 * pad);
            try { c.page.drawText(txt, { x:x + pad, y:c.y - rowH + 6, size:size, font:f, color:P.col.text }); } catch (e){}
            x += colW;
        }
        c.y -= rowH;
    }
    row(token.header, true);
    (token.rows || []).forEach(function(r){ row(r, false); });
    c.y -= 6;
}

function pdfRenderTokens(P, tokens){
    var chain = Promise.resolve();
    tokens.forEach(function(t){
        chain = chain.then(function(){
            switch (t.type){
                case "heading":    return pdfHeading(P, t);
                case "paragraph":  return pdfParagraph(P, t);
                case "list":       return pdfList(P, t, 0);
                case "blockquote": return pdfBlockquote(P, t);
                case "code":       return pdfCode(P, t, P.cur.margin);
                case "hr":         pdfHr(P); return;
                case "table":      return pdfTable(P, t);
                case "space":      P.cur.y -= 6; return;
                case "html":       return;
                default:           if (t.tokens) return pdfParagraph(P, t); if (t.text) return pdfParagraph(P, { text:t.text }); return;
            }
        });
    });
    return chain;
}

function pdfBuild(){
    var L = PDFLib, SF = L.StandardFonts, pdf;
    return L.PDFDocument.create().then(function(d){
        pdf = d;
        return Promise.all([
            pdf.embedFont(SF.Helvetica), pdf.embedFont(SF.HelveticaBold),
            pdf.embedFont(SF.HelveticaOblique), pdf.embedFont(SF.HelveticaBoldOblique),
            pdf.embedFont(SF.Courier), pdf.embedFont(SF.CourierBold)
        ]);
    }).then(function(f){
        var P = { pdf:pdf, col:PDF_COLORS(), fonts:{
            reg:f[0], bold:f[1], ital:f[2], bi:f[3], mono:f[4], monoBold:f[5]
        }, cur:null };
        P.cur = pdfNewCursor(P);
        if (isTxtMode){
            var chain = Promise.resolve();
            plain.value.split("\n").forEach(function(ln){
                chain = chain.then(function(){ return pdfFlow(P, [mkRun(ln || " ", { mono:true })], P.cur.margin, 10, 13.5, P.col.text); });
            });
            return chain.then(function(){ return pdf.save(); });
        }
        return pdfRenderTokens(P, marked.lexer(getContent())).then(function(){ return pdf.save(); });
    });
}

// ════════════════════════════════════════════════════════════════════════
// Settings panel
// ════════════════════════════════════════════════════════════════════════
function openSettings(){ syncSettingsUI(); $("#settings-overlay").addClass("show"); }
function closeSettings(){ $("#settings-overlay").removeClass("show"); }
$(function(){
    $("#settings-overlay").on("click", function(e){ if (e.target === this) closeSettings(); });
});
function showSection(sec){
    $(".nav-item").removeClass("active");
    $('.nav-item[data-sec="'+sec+'"]').addClass("active");
    $(".settings-section").removeClass("active");
    $("#sec-" + sec).addClass("active");
}

function syncSettingsUI(){
    $("#set-dark").prop("checked", isDark);
    $("#set-font").val(settings.font);
    $("#set-fontsize").val(settings.fontSize);
    $("#set-lh").val(settings.lineHeight);
    $("#set-imgdir").val(settings.imgDir);
    $("#set-compress").prop("checked", settings.compress);
    $("#set-quality").val(settings.quality);
    $("#quality-val").text(settings.quality + "%");
    $("#set-maxw").val(settings.maxWidth);
    $("#seg-mode button").removeClass("active");
    $('#seg-mode button[data-mode="'+(isTxtMode?"txt":"md")+'"]').addClass("active");
    onCompressToggle(true);
}

function applyTypography(){
    settings.font     = $("#set-font").val()    || settings.font;
    settings.fontSize = parseInt($("#set-fontsize").val()) || settings.fontSize;
    settings.lineHeight = $("#set-lh").val()     || settings.lineHeight;
    var fam = FONT_MAP[settings.font] || FONT_MAP.system;
    [rich, plain].forEach(function(el){
        el.style.fontFamily = (el === plain ? FONT_MAP.mono : fam);
        el.style.fontSize   = (el === plain ? (settings.fontSize - 1) : settings.fontSize) + "px";
        el.style.lineHeight = settings.lineHeight;
    });
    savePrefs();
}
function saveImgPrefs(){
    settings.imgDir   = $("#set-imgdir").val().trim() || "img/{name}";
    settings.quality  = parseInt($("#set-quality").val()) || 80;
    settings.maxWidth = parseInt($("#set-maxw").val()); if (isNaN(settings.maxWidth)) settings.maxWidth = 0;
    settings.compress = $("#set-compress").prop("checked");
    savePrefs();
}
function onCompressToggle(silent){
    settings.compress = $("#set-compress").prop("checked");
    var on = settings.compress;
    $("#row-quality").css("display", on ? "" : "none");
    $("#row-maxw").css("display", on ? "" : "none");
    if (!silent) saveImgPrefs();
}
function onQualityInput(){
    $("#quality-val").text($("#set-quality").val() + "%");
}

// ════════════════════════════════════════════════════════════════════════
// Theme
// ════════════════════════════════════════════════════════════════════════
function setTheme(dark){
    isDark = dark;
    document.body.classList.toggle("dark", isDark);
    $("#icon-sun").toggle(!isDark); $("#icon-moon").toggle(isDark);
    $("#set-dark").prop("checked", isDark);
    try { ao_module_setWindowTheme(isDark ? "dark" : "light"); } catch(e){}
    savePrefs();
}
function toggleTheme(){ setTheme(!isDark); }

// ════════════════════════════════════════════════════════════════════════
// Preferences persistence (localStorage + ao_module_storage)
// ════════════════════════════════════════════════════════════════════════
function prefsObject(){
    return { settings: settings, keymap: keymap, isDark: isDark };
}
function savePrefs(){
    var json = JSON.stringify(prefsObject());
    try { localStorage.setItem("text_prefs", json); } catch(e){}
    try { ao_module_storage.setStorage("Text", "prefs", json); } catch(e){}
}
function applyPrefs(obj){
    if (!obj) return;
    if (obj.settings) for (var k in obj.settings) settings[k] = obj.settings[k];
    if (obj.keymap){
        keymap = JSON.parse(JSON.stringify(DEFAULT_KEYS));
        for (var a in obj.keymap) if (a in keymap) keymap[a] = obj.keymap[a];
    }
    if (typeof obj.isDark === "boolean") setTheme(obj.isDark);
}
function loadPrefs(){
    var local = null;
    try { local = JSON.parse(localStorage.getItem("text_prefs")); } catch(e){}
    if (local) applyPrefs(local);
    // async server copy (per-user) overrides local if present
    try {
        ao_module_storage.loadStorage("Text", "prefs", function(val){
            if (val && typeof val === "string" && val.charAt(0) === "{"){
                try {
                    var obj = JSON.parse(val);
                    applyPrefs(obj);
                    buildKeyList(); syncSettingsUI(); applyTypography();
                } catch(e){}
            }
        });
    } catch(e){}
}

// ════════════════════════════════════════════════════════════════════════
// Status bar, title, dirty tracking
// ════════════════════════════════════════════════════════════════════════
function markDirty(){ if (!dirtyFlag){ dirtyFlag = true; updateTitle(); } }
function isDirty(){ return dirtyFlag; }

function updateTitle(){
    var title = !filepath ? "Untitled" : (isDirty() ? filename + " — Edited" : filename);
    try { ao_module_setWindowTitle(title); } catch(e){}
    document.title = title;
    if (isDirty()) setStatus("Unsaved changes", "dirty");
    else if (filepath) setStatus("Saved");
    else setStatus("Ready");
}

function setStatus(msg, cls){
    var el = $("#status-msg");
    el.text(msg).attr("class", cls || "");
    if (cls === "error") setTimeout(updateTitle, 3500);
}

function updateStatBar(){
    var txt = isTxtMode ? plain.value : rich.textContent.replace(//g, "");
    var words = txt.trim() ? txt.trim().split(/\s+/).length : 0;
    var chars = txt.length;
    $("#stat-count").text(words + " word" + (words !== 1 ? "s" : "") + " · " + chars + " chars");
}

// ════════════════════════════════════════════════════════════════════════
// Menus / busy / dialog
// ════════════════════════════════════════════════════════════════════════
function toggleMenu(id){
    var m = document.getElementById(id);
    var show = !m.classList.contains("show");
    hideMenus();
    if (show){ m.classList.add("show"); positionMenu(m); }
}
// position a fixed dropdown just below its trigger, right-aligned, so it is not
// clipped by the toolbar's horizontal-scroll overflow
function positionMenu(m){
    var btn = m.parentElement.querySelector(".tb-btn");
    if (!btn) return;
    var r = btn.getBoundingClientRect();
    m.style.top   = (r.bottom + 4) + "px";
    m.style.left  = "auto";
    m.style.right = Math.max(6, window.innerWidth - r.right) + "px";
}
function hideMenus(){ $(".menu").removeClass("show"); }
function showBusy(msg){ $("#busy-msg").text(msg || "Working…"); $("#busy").addClass("show"); }
function hideBusy(){ $("#busy").removeClass("show"); }

// ── helpers ─────────────────────────────────────────────────────────────
function escapeHtml(s){ return String(s).replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;"); }
function escapeAttr(s){ return escapeHtml(s).replace(/"/g,"&quot;"); }
function debounce(fn, ms){ var t; return function(){ clearTimeout(t); var a=arguments,c=this; t=setTimeout(function(){ fn.apply(c,a); }, ms); }; }

// ════════════════════════════════════════════════════════════════════════
// Close handling (unsaved changes)
// ════════════════════════════════════════════════════════════════════════
function showDialog(cb){ dlgCallback = cb; $("#confirm-overlay").addClass("show"); }
function hideDialog(){ $("#confirm-overlay").removeClass("show"); }
function dlgCancel(){ var cb=dlgCallback; hideDialog(); dlgCallback=null; if(cb) cb("cancel"); }
function dlgDiscard(){ var cb=dlgCallback; hideDialog(); dlgCallback=null; if(cb) cb("discard"); }
function dlgSave(){
    pendingClose = dlgCallback; dlgCallback = null; hideDialog();
    if (!filepath){
        var def = isTxtMode ? "Untitled.txt" : "Untitled.md";
        ao_module_openFileSelector(handleDlgSaveAs, "user:/Desktop", "new", false, { defaultName: def });
    } else {
        doSave(function(){ if (pendingClose){ pendingClose("saved"); pendingClose=null; } });
    }
}
function handleDlgSaveAs(fd){
    if (!fd || !fd.length){ pendingClose = null; return; }
    filepath = fd[0].filepath; filename = fd[0].filename;
    doSave(function(){ if (pendingClose){ pendingClose("saved"); pendingClose=null; } });
}

function ao_module_close(){
    if (!isDirty()){ ao_module_closeHandler(); return; }
    showDialog(function(result){
        if (result === "saved" || result === "discard") ao_module_closeHandler();
    });
}
if (!ao_module_virtualDesktop){
    window.onbeforeunload = function(){ if (isDirty()) return "You have unsaved changes. Leave anyway?"; };
}
</script>
</body>
</html>