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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<title>FB2 Reader + Translate + TTS (OpenRouter + OpenAI)</title>
<link rel="icon"
href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='0.9em' font-size='88'>📚</text></svg>">
<style>
:root {
--bg: #0b0f14;
--panel: #121821;
--muted: #6b7a90;
--text: #e9eef7;
--accent: #7bd88f;
--accent-2: #5da9ff;
--danger: #ff6b6b;
--border: #1e2633;
--chip: #0f141d;
--shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
html, body { height: 100%; }
body {
margin: 0;
background: linear-gradient(180deg, var(--bg), #0e141d);
color: var(--text);
font: 15px/1.6 system-ui,-apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
}
header {
position: sticky; top: 0; z-index: 3;
backdrop-filter: saturate(1.2) blur(6px);
background: rgba(10,14,20,.7);
border-bottom: 1px solid var(--border);
}
.bar { display:flex; gap:.75rem; align-items:center; padding:.7rem 1rem; flex-wrap:wrap; }
.title { font-weight:700; letter-spacing:.2px; margin-right:.5rem; }
.spacer { flex:1; }
.chip { background:var(--chip); border:1px solid var(--border); color:var(--text); padding:.45rem .65rem; border-radius:10px; display:inline-flex; align-items:center; gap:.5rem; }
input[type="file"], select, input[type="text"]{
color:var(--text); background:var(--panel); border:1px solid var(--border); border-radius:10px; padding:.5rem .6rem; outline:none; box-shadow:none;
}
input[type="text"]::placeholder{ color:#8b97aa; }
button{ background:linear-gradient(180deg,#182235,#111827); color:var(--text); border:1px solid var(--border); border-radius:12px; padding:.55rem .8rem; cursor:pointer; box-shadow:var(--shadow); transition:transform .03s ease; }
button:hover{ transform: translateY(-1px); }
button.accent{ background:linear-gradient(180deg,#0f2b1b,#0b2015); border-color:#163b27; color:#c6f7d0; }
button.blue{ background:linear-gradient(180deg,#0e2240,#0a1a31); border-color:#143058; color:#cae1ff; }
button.danger{ background:linear-gradient(180deg,#3a1212,#2a0e0e); border-color:#6b1f1f; color:#ffdada; }
main{ max-width:980px; margin:1rem auto 4rem; padding:0 1rem; }
.file-meta{ color:var(--muted); margin:.35rem 0 1rem; display:flex; gap:1rem; flex-wrap:wrap; }
.para{ background:rgba(255,255,255,.02); border:1px solid var(--border); border-radius:16px; padding:1rem .9rem; margin:.6rem 0; box-shadow:var(--shadow); position:relative; }
.para[data-status="loading"]{ opacity:.7; }
.para-number{ position:absolute; left:-.6rem; top:-.6rem; background:#101724; border:1px solid var(--border); padding:.25rem .5rem; border-radius:11px; font-size:.8rem; color:#a8b7cc; }
.para .original{ cursor:pointer; }
.para .original:hover{ background: rgba(123,216,143,.08); transition: background .2s; }
.actions{ display:flex; gap:.5rem; align-items:center; margin-top:.6rem; flex-wrap:wrap; color:#9ab0c6; font-size:.9rem; }
.actions .hint{ opacity:.8; }
.translation{ margin-top:.75rem; padding:.75rem .75rem; border-left:3px solid var(--accent); background:rgba(123,216,143,.08); border-radius:10px; }
.translation em{ color:#d7ffe4; }
/* Prompt reveal */
.prompt{ margin-top:.6rem; padding:.6rem .7rem; border-left:3px solid var(--accent-2); background:rgba(93,169,255,.08); border-radius:10px; font-size:.85rem; white-space:pre-wrap; }
.prompt pre{ margin:.35rem 0; white-space:pre-wrap; }
.muted{ color:var(--muted); }
.badge{ background:#0f1520; border:1px solid var(--border); padding:.15rem .45rem; border-radius:8px; font-size:.78rem; }
.hidden{ display:none !important; }
.spinner{ width:14px; height:14px; border:2px solid #2a3648; border-top-color:var(--accent); border-radius:50%; display:inline-block; animation:spin .8s linear infinite; vertical-align:-2px; }
@keyframes spin{ to{ transform:rotate(360deg);} }
.divider{ height:1px; background:var(--border); margin:1rem 0; opacity:.8; }
.jump{ display:flex; gap:.5rem; align-items:center; flex-wrap:wrap; }
.footer-info{ color:#8294ab; font-size:.88rem; margin-top:1.2rem; }
/* Modal */
.modal{ position:fixed; inset:0; display:flex; align-items:center; justify-content:center; background:rgba(0,0,0,.55); z-index:10; padding:1rem; }
.modal > .card{ width:min(680px,100%); background:#0f1520; border:1px solid var(--border); border-radius:16px; box-shadow:var(--shadow); padding:1rem; display:flex; flex-direction:column; gap:.6rem; }
.card h3{ margin:.2rem 0 .2rem; font-size:1.15rem; }
.card p{ margin:.2rem 0; color:#9db0c7; }
.row{ display:flex; gap:.5rem; flex-wrap:wrap; align-items:center; }
.grow{ flex:1; }
code.k{ background:#09111b; border:1px solid #102033; padding:.15rem .35rem; border-radius:8px; }
.linklike{ text-decoration:underline; cursor:pointer; color:#8ac8ff; }
.mini{ font-size:.82rem; }
.audio-holder{ display:flex; align-items:center; gap:.5rem; }
.audio-holder audio { height: 25px; }
</style>
</head>
<body>
<header>
<div class="bar">
<div class="title">📖 FB2 → Translator</div>
<label class="chip">
<input id="fileInput" type="file" accept=".fb2,.xml" />
<span>Upload FB2</span>
</label>
<label class="chip" title="Target translation language">
<span>Language:</span>
<select id="lang">
<option value="ru" selected>Russian (ru)</option>
<option value="en">English (en)</option>
<option value="uk">Ukrainian (uk)</option>
<option value="de">Deutsch (de)</option>
<option value="fr">Français (fr)</option>
<option value="es">Español (es)</option>
<option value="it">Italiano (it)</option>
<option value="pl">Polski (pl)</option>
<option value="tr">Türkçe (tr)</option>
<option value="zh">中文 (zh)</option>
<option value="ja">日本語 (ja)</option>
</select>
</label>
<label class="chip" title="Model on OpenRouter">
<span>Model:</span>
<input id="model" type="text" value="qwen/qwen3-235b-a22b-2507" size="18" />
</label>
<button id="setKeyBtn" class="blue">🔑 OpenRouter Key</button>
<button id="ttsSettingsBtn" class="blue">🎙️ TTS Settings</button>
<div class="jump">
<input id="gotoInput" type="text" placeholder="#para" size="6" />
<button id="gotoBtn">Go</button>
<button id="gotoLastBtn">↓ Last</button>
</div>
<div class="spacer"></div>
</div>
</header>
<main>
<div id="fileMeta" class="file-meta hidden"></div>
<div id="output"></div>
<div id="emptyState" class="footer-info">
Drop an .fb2 file — all paragraphs will be numbered. Click a paragraph to request a translation from OpenRouter and show the result <em>below</em> the original.<br />
On first run you'll be asked for an API key and it will be stored in <code class="k">localStorage</code>. Translations are cached locally (by file/language/paragraph).
</div>
</main>
<!-- Modal: OpenRouter API key -->
<div id="keyModal" class="modal hidden" role="dialog" aria-modal="true">
<div class="card">
<h3>🔑 OpenRouter API Key</h3>
<p>
Create a key at
<span class="linklike" onclick="window.open('https://openrouter.ai/keys','_blank')">openrouter.ai/keys</span>
and paste it here. The key will be saved locally and used for translations.
</p>
<div class="row">
<input id="apiKeyInput" type="text" class="grow" placeholder="sk-or-v1-..." />
<button id="saveKeyBtn" class="accent">Save</button>
<button id="closeKeyBtn">Cancel</button>
</div>
<p class="muted mini">Your key lives only in your browser. You can remove it anytime via the “OpenRouter Key” button.</p>
</div>
</div>
<!-- Modal: TTS settings (OpenAI) -->
<div id="ttsModal" class="modal hidden" role="dialog" aria-modal="true">
<div class="card">
<h3>🎙️ OpenAI TTS Settings</h3>
<p>Provide your OpenAI API key and choose a TTS model & voice. The key is stored in <code class="k">localStorage</code> and never leaves your browser except for direct calls to OpenAI.</p>
<div class="row">
<input id="ttsKeyInput" type="text" class="grow" placeholder="sk-... (OpenAI API Key)" />
<button id="ttsSaveBtn" class="accent">Save</button>
<button id="ttsCloseBtn">Close</button>
</div>
<div class="row">
<label class="chip"><span>Model:</span>
<select id="ttsModel">
<option value="gpt-4o-mini-tts" selected>gpt-4o-mini-tts</option>
<option value="tts-1">tts-1</option>
<option value="tts-1-hd">tts-1-hd</option>
</select>
</label>
<label class="chip"><span>Voice:</span>
<select id="ttsVoice">
<option value="nova">nova</option>
<option value="shimmer">shimmer</option>
<option value="echo">echo</option>
<option value="onyx">onyx</option>
<option value="fable">fable</option>
<option value="alloy">alloy</option>
<option value="ash">ash</option>
<option value="sage">sage</option>
<option value="coral">coral</option>
</select>
</label>
<button id="ttsTestBtn">▶ Test</button>
</div>
<div class="row">
<label class="chip"><span>TTS cache Proxy:</span>
<select id="ttsCacheProxy">
<option value="none">none</option>
<option value="localhost:22999">localhost:22999</option>
</select>
</label>
</div>
<p class="muted mini">Tip: TTS proxy allows to cache mp3 files to reuse them with no cost.</p>
</div>
</div>
<script>
(()=>{
const DEBUG = true;
const log = (...a)=>{ if(DEBUG) console.log(...a); };
const els = {
file: document.getElementById('fileInput'),
lang: document.getElementById('lang'),
model: document.getElementById('model'),
out: document.getElementById('output'),
meta: document.getElementById('fileMeta'),
empty: document.getElementById('emptyState'),
setKeyBtn: document.getElementById('setKeyBtn'),
keyModal: document.getElementById('keyModal'),
apiKeyInput: document.getElementById('apiKeyInput'),
saveKeyBtn: document.getElementById('saveKeyBtn'),
closeKeyBtn: document.getElementById('closeKeyBtn'),
gotoInput: document.getElementById('gotoInput'),
gotoBtn: document.getElementById('gotoBtn'),
gotoLastBtn: document.getElementById('gotoLastBtn'),
// TTS
ttsBtn: document.getElementById('ttsSettingsBtn'),
ttsModal: document.getElementById('ttsModal'),
ttsKeyInput: document.getElementById('ttsKeyInput'),
ttsSaveBtn: document.getElementById('ttsSaveBtn'),
ttsCloseBtn: document.getElementById('ttsCloseBtn'),
ttsModel: document.getElementById('ttsModel'),
ttsVoice: document.getElementById('ttsVoice'),
ttsTestBtn: document.getElementById('ttsTestBtn'),
ttsCacheProxy: document.getElementById('ttsCacheProxy'),
};
const state = {
apiKey: null, // OpenRouter
fileHash: null,
fileName: null,
bookTitle: null,
bookAuthor: null,
totalParas: 0,
// TTS
ttsKey: null,
};
// ==== Local Storage keys ====
const LS_KEY = 'openrouter_api_key';
const LS_MODEL = 'fb2_model';
const LS_TTS_KEY = 'openai_tts_key';
const LS_TTS_MODEL = 'openai_tts_model';
const LS_TTS_VOICE = 'openai_tts_voice';
const LS_TTS_PROXY = 'tts_proxy';
const getTransKey = (hash, lang, idx)=>`t_${hash}_${lang}_${idx}`;
const getLastPosKey = (hash)=>`lastpos_${hash}`;
function loadPersisted(){
const k = localStorage.getItem(LS_KEY); if(k) state.apiKey = k;
const m = localStorage.getItem(LS_MODEL); if(m) els.model.value = m;
const tk = localStorage.getItem(LS_TTS_KEY); if(tk) state.ttsKey = tk;
const tm = localStorage.getItem(LS_TTS_MODEL); if(tm) els.ttsModel.value = tm;
const tv = localStorage.getItem(LS_TTS_VOICE); if(tv) els.ttsVoice.value = tv;
const pr = localStorage.getItem(LS_TTS_PROXY); if(pr) els.ttsCacheProxy.value = pr;
}
function ensureApiKey(force=false){
if (force || !state.apiKey){
els.apiKeyInput.value = state.apiKey || '';
els.keyModal.classList.remove('hidden');
els.apiKeyInput.focus({preventScroll:true});
return false;
}
return true;
}
function saveApiKey(){
const v = (els.apiKeyInput.value||'').trim(); if(!v) return;
state.apiKey = v; localStorage.setItem(LS_KEY, v);
els.keyModal.classList.add('hidden');
}
function removeApiKey(){ state.apiKey = null; localStorage.removeItem(LS_KEY); }
// TTS helpers
function ensureTtsKey(force=false){
if (force || !state.ttsKey){
els.ttsKeyInput.value = state.ttsKey || '';
els.ttsModal.classList.remove('hidden');
els.ttsKeyInput.focus({preventScroll:true});
return false;
}
return true;
}
function saveTts(){
const key = (els.ttsKeyInput.value||'').trim(); if(key){ state.ttsKey = key; localStorage.setItem(LS_TTS_KEY,key); }
const model = els.ttsModel.value; localStorage.setItem(LS_TTS_MODEL, model);
const voice = els.ttsVoice.value.trim(); localStorage.setItem(LS_TTS_VOICE, voice);
const proxy = els.ttsCacheProxy.value; localStorage.setItem(LS_TTS_PROXY, proxy);
els.ttsModal.classList.add('hidden');
}
// ==== FB2 parsing ====
async function computeHash(arrayBuffer){
const hash = await crypto.subtle.digest('SHA-256', arrayBuffer);
return [...new Uint8Array(hash)].map(b=>b.toString(16).padStart(2,'0')).join('');
}
function fb2ToParagraphNodes(xmlDoc){
const bodies = Array.from(xmlDoc.getElementsByTagName('body'));
const paras = [];
bodies.forEach((body)=>{
const pNodes = body.querySelectorAll('section p, p');
pNodes.forEach(p=>paras.push(p));
});
return paras;
}
function fb2ExtractTitle(doc){
const bt = doc.getElementsByTagName('book-title')[0];
if(bt && bt.textContent) return bt.textContent.trim();
const titleP = doc.querySelector('title p');
return titleP ? titleP.textContent.trim() : 'Untitled';
}
function fb2ExtractAuthor(doc){
const author = doc.getElementsByTagName('author')[0];
if (author && author.textContent) return author.textContent.trim();
return 'Unknown';
}
function sanitizeInline(node){
const ALLOWED = { emphasis:'em', strong:'strong', sub:'sub', sup:'sup', strikethrough:'s', code:'code', a:'a', i:'i', b:'b' };
if (node.nodeType === Node.TEXT_NODE){
return node.nodeValue.replace(/</g,'<').replace(/>/g,'>');
}
if (node.nodeType === Node.ELEMENT_NODE){
const tag = node.tagName.toLowerCase();
if (tag in ALLOWED){
const htmlTag = ALLOWED[tag];
let attrs = '';
if (htmlTag === 'a'){
const href = node.getAttribute('href') || node.getAttribute('l:href') || '#';
attrs = ` href="${href.replace(/"/g,'"')}" target="_blank" rel="noopener" `;
}
const inner = Array.from(node.childNodes).map(sanitizeInline).join('');
return `<${htmlTag}${attrs}>${inner}</${htmlTag}>`;
}
return Array.from(node.childNodes).map(sanitizeInline).join('');
}
return '';
}
function paragraphToHTML(pNode){
return (Array.from(pNode.childNodes).map(sanitizeInline).join('').trim() || pNode.textContent.trim());
}
function buildFilename(idx) {
return `tts_${state.bookTitle.replaceAll(' ', '_')}_p${idx}`;
}
// ==== Rendering ====
async function renderParagraphs(paras){
const startTime = performance.now();
state.totalParas = paras.length;
els.out.innerHTML = '';
els.empty.innerHTML = `<span class="spinner"></span> Rendering ${paras.length} paragraphs…`;
await new Promise(r => setTimeout(r, 10)); // Yield to UI
els.meta.classList.remove('hidden');
const lastPos = parseInt(localStorage.getItem(getLastPosKey(state.fileHash))||'0',10);
els.meta.innerHTML = `
<span class="badge">File: ${escapeHtml(state.fileName)}</span>
<span class="badge">Title: ${escapeHtml(state.bookTitle)}</span>
<span class="badge">Author: ${escapeHtml(state.bookAuthor)}</span>
<span class="badge">Paragraphs: ${paras.length}</span>
${lastPos ? `<span class="badge">Last #${lastPos}</span>` : ''}
`;
paras.forEach((pNode,i)=>{
const idx = i+1;
const html = paragraphToHTML(pNode); if(!html) return;
const wrap = document.createElement('section');
wrap.className = 'para'; wrap.id = `p-${idx}`; wrap.dataset.idx = String(idx);
const num = document.createElement('div');
num.className = 'para-number'; num.textContent = `#${idx}`;
const original = document.createElement('div');
original.className = 'original'; original.innerHTML = html;
const actions = document.createElement('div');
actions.className = 'actions';
actions.innerHTML = `
<span class="hint">Click the paragraph → translation ↓</span>
<span class="muted">•</span>
<span class="muted">Locally cached</span>
<span class="muted">•</span>
<a href="javascript:" class="force-translate muted">Translate</a>
<span class="muted">•</span>
<a href="javascript:" class="show-prompt muted">Prompt</a>
<span class="muted">•</span>
<a href="javascript:" class="speak-loud muted">🔊 TTS</a>
<span class="audio-holder"></span>
`;
const promptBox = document.createElement('div');
promptBox.className = 'prompt hidden';
promptBox.innerHTML = `<span class="muted">Prompt will appear here…</span>`;
const translation = document.createElement('div');
translation.className = 'translation hidden';
translation.innerHTML = `<span class="muted">Translation will appear here…</span>`;
wrap.appendChild(num);
wrap.appendChild(original);
wrap.appendChild(actions);
wrap.appendChild(promptBox);
wrap.appendChild(translation);
els.out.appendChild(wrap);
const cached = localStorage.getItem(getTransKey(state.fileHash, els.lang.value, idx));
if (cached){ translation.innerHTML = `${escapeHtml(cached)}`; translation.classList.remove('hidden'); }
wrap.addEventListener('click', async (ev)=>{
if (ev.target.closest('a.force-translate')){ await onTranslateClick(wrap, html, idx); return; }
if (ev.target.closest('a.show-prompt')){ onPromptClick(wrap, html, idx); return; }
if (ev.target.closest('a.speak-loud')){ await onSpeakClick(wrap, html, idx); return; }
if (ev.target.closest('.original') && translation.classList.contains('hidden')){ await onTranslateClick(wrap, html, idx); }
}, false);
});
if (lastPos && document.getElementById(`p-${lastPos}`)){
document.getElementById(`p-${lastPos}`).scrollIntoView({behavior:'smooth', block:'start'});
}
els.empty.classList.add('hidden');
console.log(`Rendered ${paras.length} paragraphs in ${(performance.now()-startTime).toFixed(2)}ms`);
// After rendering all paragraphs, run a pass to attach audio if present in the cache
// not implemented yet
}
// ==== Translation ====
async function onTranslateClick(wrap, originalHtml, idx){
const lang = els.lang.value;
const modelRaw = els.model.value.trim();
if (!ensureApiKey(false)) return;
const transEl = wrap.querySelector('.translation');
const cached = localStorage.getItem(getTransKey(state.fileHash, lang, idx));
if (cached){
transEl.classList.toggle('hidden');
localStorage.setItem(getLastPosKey(state.fileHash), String(idx));
}
const tmp = document.createElement('div'); tmp.innerHTML = originalHtml; const originalText = tmp.textContent.trim();
if (!originalText) return;
wrap.dataset.status = 'loading';
transEl.classList.remove('hidden');
transEl.innerHTML = `<span class="spinner"></span> <span class="muted">Translating via OpenRouter…</span>`;
try{
const model = (modelRaw || 'qwen/qwen3-235b-a22b-2507').replace(/\/+$/, '');
localStorage.setItem(LS_MODEL, model);
const { system, user } = buildPrompt(idx, state.bookTitle, state.bookAuthor, lang, originalText);
const messages = [
{ role: 'system', content: system },
{ role: 'user', content: user }
];
let version = 'v0.0.0';
if (location.pathname.match(/v[\d.]+\.html$/)){
version = location.pathname.match(/(v[\d.]+)\.html$/)[1];
}
const response = await fetch('https://openrouter.ai/api/v1/chat/completions', {
method:'POST',
headers:{
'Content-Type':'application/json',
'Authorization':`Bearer ${state.apiKey}`,
'HTTP-Referer': `https://phplego.github.io/fb2reader/fbReader_${version}.html`,
'X-Title':'FB2 Reader ' + version,
},
body: JSON.stringify({ model, messages, temperature: 0.7 })
});
if(!response.ok){ const text = await response.text(); throw new Error(`API error (${response.status}): ${text.slice(0,300)}`); }
const data = await response.json();
const output = data.choices?.[0]?.message?.content?.trim();
if(!output) throw new Error('Empty model response');
localStorage.setItem(getTransKey(state.fileHash, lang, idx), output);
transEl.innerHTML = `${escapeHtml(output)}`;
localStorage.setItem(getLastPosKey(state.fileHash), String(idx));
} catch(err){
transEl.innerHTML = `<span style="color:var(--danger)">❗ ${escapeHtml(err.message || String(err))}</span>`;
} finally { delete wrap.dataset.status; }
}
// ==== Reveal Prompt button ====
function onPromptClick(wrap, originalHtml, idx){
const tmp = document.createElement('div'); tmp.innerHTML = originalHtml; const originalText = (tmp.textContent||'').trim();
const lang = els.lang.value;
const { system, user } = buildPrompt(idx, state.bookTitle, state.bookAuthor, lang, originalText);
const promptBox = wrap.querySelector('.prompt');
promptBox.innerHTML = `
<div><span class="badge">system</span><pre>${escapeHtml(system)}</pre></div>
<div><span class="badge">user</span><pre>${escapeHtml(user)}</pre></div>
`;
promptBox.classList.toggle('hidden');
}
// ==== Text-to-Speech (OpenAI) ====
async function onSpeakClick(wrap, originalHtml, idx){
if (!ensureTtsKey(false)) return;
const text = (()=>{ const d=document.createElement('div'); d.innerHTML=originalHtml; return (d.textContent||'').trim(); })();
if(!text) return;
// UI target for audio
const holder = wrap.querySelector('.audio-holder');
holder.innerHTML = `<span class="spinner"></span><span class="muted"> Trying to load the local file…</span>`;
// try local file, if any
const localAudioFile = buildFilename(idx) + `.mp3`;
holder.innerHTML = `<span class="spinner"></span><span class="muted"> Generating speech…</span>`;
try{
const model = els.ttsModel.value || 'gpt-4o-mini-tts';
const voice = els.ttsVoice.value.trim() || 'alloy';
// Persist choices
localStorage.setItem(LS_TTS_MODEL, model);
localStorage.setItem(LS_TTS_VOICE, voice);
let domain = 'https://api.openai.com';
if (els.ttsCacheProxy.value && els.ttsCacheProxy.value !== 'none') {
domain = `http://${els.ttsCacheProxy.value}`;
}
const proxy = els.ttsCacheProxy.value;
const resp = await fetch(`${domain}/v1/audio/speech`, {
method: 'POST',
headers: {
'Authorization': `Bearer ${state.ttsKey}`,
'Content-Type': 'application/json',
'X-Preferred-Cache-Key': buildFilename(idx)
},
body: JSON.stringify({ model, voice, input: text, response_format: 'mp3' })
});
if(!resp.ok){ const t = await resp.text(); throw new Error(`OpenAI TTS error (${resp.status}): ${t.slice(0,300)}`); }
const ab = await resp.arrayBuffer();
const blob = new Blob([ab], { type: 'audio/mpeg' });
const url = URL.createObjectURL(blob);
const existing = holder.querySelector('audio');
if (existing) existing.remove();
const audio = document.createElement('audio');
audio.controls = true; audio.src = url;
audio.title = buildFilename(idx);
holder.innerHTML = '';
holder.appendChild(audio);
audio.play().catch(()=>{});
} catch(err){
holder.innerHTML = `<span style="color:var(--danger)">❗ ${escapeHtml(err.message || String(err))}</span>`;
}
}
// ==== UI actions ====
els.setKeyBtn.addEventListener('click', ()=>{
ensureApiKey(true);
});
els.saveKeyBtn.addEventListener('click', saveApiKey);
els.closeKeyBtn.addEventListener('click', ()=> els.keyModal.classList.add('hidden'));
// TTS settings
els.ttsBtn.addEventListener('click', ()=>{ ensureTtsKey(true); });
els.ttsSaveBtn.addEventListener('click', saveTts);
els.ttsCloseBtn.addEventListener('click', ()=> els.ttsModal.classList.add('hidden'));
els.ttsTestBtn.addEventListener('click', async()=>{
if (!ensureTtsKey(false)) return;
const sample = 'This is a short test of the text-to-speech settings.';
try{
const resp = await fetch('https://api.openai.com/v1/audio/speech', {
method:'POST', headers:{ 'Authorization':`Bearer ${state.ttsKey}`, 'Content-Type':'application/json' },
body: JSON.stringify({ model: els.ttsModel.value || 'gpt-4o-mini-tts', voice: (els.ttsVoice.value||'alloy').trim(), input: sample, response_format:'mp3' })
});
if(!resp.ok){ const t = await resp.text(); throw new Error(`OpenAI TTS error (${resp.status}): ${t.slice(0,240)}`); }
const ab = await resp.arrayBuffer(); const blob = new Blob([ab], {type:'audio/mpeg'}); const url = URL.createObjectURL(blob);
const audio = new Audio(url); audio.play();
} catch(err){ alert(err.message || String(err)); }
});
// File load
els.file.addEventListener('change', async (e)=>{
const file = e.target.files?.[0]; if(!file) return;
state.fileName = file.name;
const buf = await file.arrayBuffer();
state.fileHash = await computeHash(buf);
const text = new TextDecoder('utf-8').decode(buf);
let xml;
try{
xml = new DOMParser().parseFromString(text, 'text/xml');
if (xml.querySelector('parsererror')) throw new Error('Cannot parse XML. Make sure it\'s FB2.');
} catch(err){ alert('FB2 parse error: ' + (err.message || String(err))); return; }
state.bookTitle = fb2ExtractTitle(xml);
state.bookAuthor = fb2ExtractAuthor(xml);
const paras = fb2ToParagraphNodes(xml);
if(!paras.length){ alert('No <p> paragraphs found in the file.'); return; }
await renderParagraphs(paras);
});
// Jump to paragraph
els.gotoBtn.addEventListener('click', ()=> gotoPara());
els.gotoInput.addEventListener('keydown', (ev)=>{ if(ev.key==='Enter') gotoPara(); });
els.gotoLastBtn.addEventListener('click', ()=>{
const lastPos = parseInt(localStorage.getItem(getLastPosKey(state.fileHash))||'0',10);
gotoPara(lastPos);
});
function gotoPara(num=null){
let v = 0; if(num!=null){ v=num; } else { v = parseInt(els.gotoInput.value.trim(),10); }
if(!v || v<1 || v>state.totalParas) return;
const el = document.getElementById(`p-${v}`);
if(el){ el.scrollIntoView({behavior:'smooth', block:'start'}); el.classList.add('focus'); setTimeout(()=>el.classList.remove('focus'), 900); }
}
// Helpers
function buildPrompt(idx, bookTitle, bookAuthor, lang, origText){
const system = `You are a precise translation engine. Translate the user's paragraph into ${lang}.
- It is the paragraph #${idx} from the book "${bookTitle}" written by "${bookAuthor}".
- Preserve meaning, tone and simple inline emphasis when obvious.
- Do NOT add commentary. Return ONLY the translation text.`;
const user = (origText || '').trim();
return { system, user };
}
function escapeHtml(s){ return String(s).replace(/[&<>"']/g, m=>({'&':'&','<':'<','>':'>','"':'"','\'':'''}[m])); }
// Init
loadPersisted();
setTimeout(()=>{ if(!state.apiKey) ensureApiKey(false); }, 500);
})();
</script>
<script>
/* ===== Parallel Dialog (drop-in) v0.1 — self-contained ===== */
(function ParallelDialogInstaller(){
const CSS = `
.pd-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;z-index:9999;padding:16px}
.pd-backdrop.pd-open{display:flex}
.pd-card{width:min(1100px,96vw);max-height:90vh;overflow:auto;background:#0f1520;border:1px solid #222733;border-radius:16px;box-shadow:0 10px 40px rgba(0,0,0,.35)}
.pd-top{display:flex;align-items:center;gap:8px;position:sticky;top:0;background:#0f1220;border-bottom:1px solid #222733;padding:10px 12px}
.pd-title{color:#9aa3b2;text-transform:uppercase;font-size:12px;letter-spacing:.08em}
.pd-x{margin-left:auto;border:0;background:#0f1220;color:#e6eaf0;font-size:22px;line-height:1;padding:6px 10px;cursor:pointer;border-radius:10px}
.pd-grid{display:grid;grid-template-columns:1fr 1fr}
.pd-head{display:grid;grid-template-columns:1fr 1fr;background:#0f1220;border-bottom:1px solid #222733}
.pd-head div{padding:10px 14px;color:#9aa3b2;text-transform:uppercase;font-size:12px;letter-spacing:.08em}
.pd-row{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid #222733;background:#101420}
.pd-row:nth-child(even){background:#0f1320}
.pd-cell{padding:12px 14px;overflow-wrap:anywhere}
.pd-idx{color:#9aa3b2;font-size:12px;margin-right:.5ch}
.pd-row{scroll-margin:84px}
@media (max-width:820px){.pd-head{grid-template-columns:1fr}.pd-row{grid-template-columns:1fr}}
.pd-mini-btn{margin-left:8px;background:linear-gradient(180deg,#0e2240,#0a1a31);color:#cae1ff;border:1px solid #143058;border-radius:9px;padding:2px 8px;font-size:12px;cursor:pointer}
`;
const styleTag = document.createElement('style'); styleTag.textContent = CSS; document.head.appendChild(styleTag);
const backdrop = document.createElement('div');
backdrop.className = 'pd-backdrop';
backdrop.innerHTML = `
<div class="pd-card" role="dialog" aria-modal="true" aria-labelledby="pd-title">
<div class="pd-top">
<div id="pd-title" class="pd-title">Original ↔ Translation</div>
<button class="pd-x" aria-label="Close">×</button>
</div>
<div class="pd-body"></div>
</div>`;
document.body.appendChild(backdrop);
const body = backdrop.querySelector('.pd-body');
const closeBtn = backdrop.querySelector('.pd-x');
function openModal(html){ body.innerHTML = html; backdrop.classList.add('pd-open'); closeBtn.focus(); }
function closeModal(){ backdrop.classList.remove('pd-open'); document.body.style.overflow=''; }
closeBtn.addEventListener('click', closeModal);
backdrop.addEventListener('click', (e)=>{ if(e.target===backdrop) closeModal(); });
document.addEventListener('keydown', (e)=>{ if(backdrop.classList.contains('pd-open') && e.key==='Escape') closeModal(); });
const esc = s => String(s||'').replace(/[&<>"']/g, m=>({'&':'&','<':'<','>':'>','"':'"','\'':'''}[m]));
const split = txt => (txt||'').replace(/\s+/g,' ').trim().split(/(?<=[.!?…]+)\s+(?=\S)/g)
function buildDialogHTML(originalText, translatedHTML){
const tmp = document.createElement('div'); tmp.innerHTML = translatedHTML;
const transText = tmp.textContent || '';
const A = split(originalText).map(s=>s.trim()).filter(Boolean);
const B = split(transText).map(s=>s.trim()).filter(Boolean);
const n = Math.max(A.length, B.length);
let rows = '';
for(let i=0;i<n;i++){
rows += `
<section class="pd-row" data-idx="${i+1}">
<div class="pd-cell"><span class="pd-idx">${i+1}.</span><span>${esc(A[i]||'')}</span></div>
<div class="pd-cell"><span class="pd-idx">${i+1}.</span><span>${esc(B[i]||'')}</span></div>
</section>`;
}
return `
<div class="pd-head"><div>Original</div><div>Translation</div></div>
${rows}`;
}
function ensureMiniButton(transEl){
if (!transEl || transEl.querySelector('.pd-mini-btn')) return;
const btn = document.createElement('button');
btn.className = 'pd-mini-btn'; btn.type = 'button'; btn.textContent = 'compare';
transEl.append(btn);
btn.addEventListener('click', (e)=>{
e.stopPropagation();
const wrap = transEl.closest('.para'); if(!wrap) return;
const origDiv = wrap.querySelector('.original');
const tmp = document.createElement('div'); tmp.innerHTML = origDiv ? origDiv.innerHTML : '';
const originalText = (tmp.textContent || '').trim();
const translatedHTML = transEl.innerHTML.replace(/<button[^>]*class="pd-mini-btn"[^>]*>.*?<\/button>/,'');
const html = buildDialogHTML(originalText, translatedHTML);
openModal(html);
});
}
const host = document.getElementById('output');
if(host){
const scan = ()=> host.querySelectorAll('.translation').forEach(ensureMiniButton);
scan();
const mo = new MutationObserver(()=> scan());
mo.observe(host, {childList:true, subtree:true});
}
})();
</script>
</body>
</html>