-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathePubReader.html
More file actions
578 lines (536 loc) · 20.7 KB
/
ePubReader.html
File metadata and controls
578 lines (536 loc) · 20.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"/>
<meta name="viewport" content="width=device-width,initial-scale=1"/>
<title>EPUB Reader</title>
<script src="jquery-3.7.1.min.js"></script>
<script src="turn.min.js"></script>
<style>
:root{--bg:#e8e0d0;--page:#faf6ed;--text:#2a2520;--ui:#5a4e42;--ui-hover:#3a3228;--accent:#8b7355;--fs:18px}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden}
body{background:var(--bg);font-family:Georgia,"Times New Roman",serif;color:var(--text)}
/* Overlay */
#overlay{position:fixed;inset:0;background:var(--bg);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:100;transition:opacity .4s}
#overlay.hidden{opacity:0;pointer-events:none}
#overlay h1{font-size:28px;color:var(--ui);margin-bottom:12px;font-weight:400}
#overlay p{color:var(--accent);font-size:15px;margin-bottom:24px}
#overlay .pick-btn{display:inline-block;padding:14px 32px;background:var(--ui);color:#fff;border-radius:10px;font-size:16px;cursor:pointer;border:none;transition:background .15s}
#overlay .pick-btn:hover{background:var(--ui-hover)}
#fileInput{display:none}
#loadStatus{margin-top:16px;font-size:14px;color:var(--accent)}
/* Book container */
#book{position:fixed;inset:0;display:none;align-items:center;justify-content:center}
#book.show{display:flex}
/* Flipbook (turn.js) */
.flipbook{position:relative;background:var(--bg)}
.flipbook .page{background:var(--page);overflow:hidden}
.flipbook .shadow{box-shadow:0 0 20px rgba(0,0,0,.15)}
/* Page content inside turn.js pages */
.pg-wrap{width:100%;height:100%;padding:30px 32px;box-sizing:border-box}
.pg-clip{overflow:hidden;width:100%;height:100%}
.pg-inner{line-height:1.7;column-fill:auto;column-gap:0;width:100%;height:100%;user-select:text;-webkit-user-select:text}
.pg-inner .spine-item{break-before:column}
.pg-inner img{max-width:100%;height:auto}
.pg-inner h1,.pg-inner h2,.pg-inner h3{margin:0.5em 0 0.3em;line-height:1.3}
.pg-inner p{margin:0 0 0.6em;text-align:justify}
/* Controls */
#controls{position:fixed;bottom:0;left:0;right:0;z-index:200;display:flex;align-items:center;justify-content:center;gap:10px;padding:8px 16px;background:rgba(90,78,66,.85);backdrop-filter:blur(6px);transition:opacity .4s;opacity:0}
#controls.show{opacity:1}
#controls button{background:none;border:1px solid rgba(255,255,255,.25);color:#fff;padding:6px 14px;border-radius:8px;font-size:14px;cursor:pointer;transition:background .15s}
#controls button:hover{background:rgba(255,255,255,.12)}
#pageInfo{color:rgba(255,255,255,.7);font-size:13px;min-width:90px;text-align:center}
#controls .sep{width:1px;height:20px;background:rgba(255,255,255,.15);margin:0 4px}
#progressBar{width:120px;height:4px;accent-color:#fff;cursor:pointer;vertical-align:middle}
/* Dark mode */
body.dark{--bg:#1a1a1e;--page:#252528;--text:#d4cfc8;--ui:#888;--accent:#777}
/* Screen reader */
#sr-info{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
</style>
</head>
<body>
<div id="overlay">
<h1>EPUB Reader</h1>
<p>Open a local .epub file to start reading</p>
<label class="pick-btn" for="fileInput">Choose EPUB File</label>
<input type="file" id="fileInput" accept=".epub"/>
<div id="loadStatus"></div>
</div>
<div id="book">
<div class="flipbook" id="flipbook"></div>
</div>
<div id="controls">
<button id="btnPrev">◀ Prev</button>
<span id="pageInfo">–</span>
<button id="btnNext">Next ▶</button>
<input type="range" id="progressBar" min="1" max="1" value="1"/>
<div class="sep"></div>
<button id="btnFontDec">A−</button>
<button id="btnFontInc">A+</button>
<div class="sep"></div>
<button id="btnDark">☾</button>
</div>
<div id="sr-info" aria-live="polite"></div>
<script>
(function(){
'use strict';
/* ── State ── */
var $fb = null;
var totalPages = 0;
var pageW = 0, pageH = 0, colW = 0;
var pageEls = [];
var fontSize = 18;
var isSingle = false;
var isDark = false;
var allContent = '';
var epubData = null;
var controlsTimer = null;
/* ================================================================
ZIP PARSER
================================================================ */
async function readZip(arrayBuffer){
var bytes = new Uint8Array(arrayBuffer);
var files = {};
var eocdOffset = -1;
for(var i = bytes.length - 22; i >= 0 && i >= bytes.length - 65557; i--){
if(bytes[i]===0x50 && bytes[i+1]===0x4b && bytes[i+2]===0x05 && bytes[i+3]===0x06){
eocdOffset = i; break;
}
}
if(eocdOffset < 0) throw new Error('Not a valid ZIP/EPUB file');
var view = new DataView(arrayBuffer);
var cdOffset = view.getUint32(eocdOffset + 16, true);
var cdEntries = view.getUint16(eocdOffset + 10, true);
var pos = cdOffset;
for(var e = 0; e < cdEntries; e++){
if(view.getUint32(pos, true) !== 0x02014b50) break;
var method = view.getUint16(pos + 10, true);
var compSize = view.getUint32(pos + 20, true);
var nameLen = view.getUint16(pos + 28, true);
var extraLen = view.getUint16(pos + 30, true);
var commentLen = view.getUint16(pos + 32, true);
var localOff = view.getUint32(pos + 42, true);
var name = new TextDecoder().decode(bytes.subarray(pos + 46, pos + 46 + nameLen));
pos += 46 + nameLen + extraLen + commentLen;
if(name.endsWith('/')) continue;
var lNameLen = view.getUint16(localOff + 26, true);
var lExtraLen = view.getUint16(localOff + 28, true);
var dataStart = localOff + 30 + lNameLen + lExtraLen;
var rawData = bytes.subarray(dataStart, dataStart + compSize);
if(method === 0){
files[name] = rawData.slice();
} else if(method === 8){
try { files[name] = await inflateData(rawData); }
catch(err){ console.warn('Decompress fail:', name, err); }
}
}
return files;
}
async function inflateData(compressedBytes){
var ds = new DecompressionStream('deflate-raw');
var writer = ds.writable.getWriter();
writer.write(compressedBytes); writer.close();
var reader = ds.readable.getReader();
var chunks = [], result;
while(true){ result = await reader.read(); if(result.done) break; chunks.push(result.value); }
var totalLen = 0;
for(var c = 0; c < chunks.length; c++) totalLen += chunks[c].length;
var out = new Uint8Array(totalLen), off = 0;
for(var c = 0; c < chunks.length; c++){ out.set(chunks[c], off); off += chunks[c].length; }
return out;
}
function fileAsText(files, path){
if(!files[path]) return '';
return new TextDecoder().decode(files[path]);
}
function fileAsDataURL(files, path){
if(!files[path]) return '';
var ext = path.split('.').pop().toLowerCase();
var mime = {jpg:'image/jpeg',jpeg:'image/jpeg',png:'image/png',gif:'image/gif',svg:'image/svg+xml',webp:'image/webp'}[ext] || 'application/octet-stream';
return 'data:' + mime + ';base64,' + uint8ToBase64(files[path]);
}
function uint8ToBase64(u8){
var str = '';
for(var i = 0; i < u8.length; i++) str += String.fromCharCode(u8[i]);
return btoa(str);
}
/* ================================================================
EPUB PARSER
================================================================ */
async function parseEpub(arrayBuffer){
loadStatus.textContent = 'Extracting files...';
var files = await readZip(arrayBuffer);
loadStatus.textContent = 'Parsing structure...';
var containerXml = fileAsText(files, 'META-INF/container.xml');
if(!containerXml) throw new Error('Missing container.xml');
var opfMatch = containerXml.match(/full-path="([^"]+)"/);
if(!opfMatch) throw new Error('Cannot find OPF path');
var opfPath = opfMatch[1];
var opfDir = opfPath.substring(0, opfPath.lastIndexOf('/') + 1);
var opfXml = fileAsText(files, opfPath);
if(!opfXml) throw new Error('Cannot read OPF file');
var parser = new DOMParser();
var opfDoc = parser.parseFromString(opfXml, 'application/xml');
var manifest = {};
var items = opfDoc.querySelectorAll('manifest > item');
for(var i = 0; i < items.length; i++){
var id = items[i].getAttribute('id');
var href = items[i].getAttribute('href');
var media = items[i].getAttribute('media-type') || '';
manifest[id] = { href: opfDir + href, media: media };
}
var spine = [];
var spineItems = opfDoc.querySelectorAll('spine > itemref');
for(var j = 0; j < spineItems.length; j++){
var idref = spineItems[j].getAttribute('idref');
if(manifest[idref]) spine.push(manifest[idref].href);
}
var titleEl = opfDoc.querySelector('metadata > *|title');
var title = titleEl ? titleEl.textContent : 'Untitled';
return { spine: spine, manifest: manifest, files: files, opfDir: opfDir, title: title };
}
/* ================================================================
CONTENT RENDERING
================================================================ */
function renderSpineItem(epub, href){
var html = fileAsText(epub.files, href);
if(!html) return '';
var itemDir = href.substring(0, href.lastIndexOf('/') + 1);
var parser = new DOMParser();
var doc = parser.parseFromString(html, 'application/xhtml+xml');
if(doc.querySelector('parsererror')) doc = parser.parseFromString(html, 'text/html');
var scripts = doc.querySelectorAll('script');
for(var i = 0; i < scripts.length; i++) scripts[i].remove();
var imgs = doc.querySelectorAll('img, image');
for(var j = 0; j < imgs.length; j++){
var src = imgs[j].getAttribute('src') || imgs[j].getAttributeNS('http://www.w3.org/1999/xlink', 'href') || '';
if(src && !src.startsWith('data:')){
var resolved = resolvePath(itemDir, src);
var dataUrl = fileAsDataURL(epub.files, resolved);
if(imgs[j].tagName === 'image') imgs[j].setAttributeNS('http://www.w3.org/1999/xlink', 'href', dataUrl);
else imgs[j].setAttribute('src', dataUrl);
}
}
var body = doc.querySelector('body');
return body ? body.innerHTML : doc.documentElement.innerHTML;
}
function resolvePath(base, rel){
if(rel.startsWith('/')) return rel.substring(1);
var parts = base.split('/'); parts.pop();
var relParts = rel.split('/');
for(var i = 0; i < relParts.length; i++){
if(relParts[i] === '..') parts.pop();
else if(relParts[i] !== '.') parts.push(relParts[i]);
}
return parts.join('/');
}
/* ================================================================
PAGINATION — measure pages via CSS columns
================================================================ */
function getPageWidth(){
return isSingle ? window.innerWidth : Math.floor(window.innerWidth / 2);
}
function measurePages(){
pageW = getPageWidth();
pageH = window.innerHeight;
colW = Math.max(50, pageW - 64);
var ch = Math.max(50, pageH - 60);
var m = document.createElement('div');
m.style.cssText = 'position:absolute;left:-9999px;top:0;width:'+colW+'px;height:'+ch+'px;overflow:hidden;font-size:'+fontSize+'px;line-height:1.7;column-fill:auto;column-width:'+colW+'px;column-gap:0';
m.innerHTML = allContent;
document.body.appendChild(m);
m.offsetHeight;
totalPages = Math.max(1, Math.round(m.scrollWidth / colW));
m.parentNode.removeChild(m);
if(!isSingle && totalPages % 2 !== 0) totalPages++;
}
/* ================================================================
TURN.JS INTEGRATION
================================================================ */
function fillPage(el, idx){
if(!el || idx < 0 || idx >= totalPages) return;
if(el._pgIdx === idx && el._pgFS === fontSize) return;
el._pgIdx = idx;
el._pgFS = fontSize;
el.innerHTML = '<div class="pg-wrap"><div class="pg-clip"><div class="pg-inner" style="font-size:'+fontSize+'px;column-width:'+colW+'px;transform:translateX(-'+(idx*colW)+'px)">'+allContent+'</div></div></div>';
}
function clearPage(el){
if(!el) return;
el._pgIdx = -1;
el._pgFS = -1;
el.innerHTML = '';
}
function populateAround(page){
var r = 4;
for(var i = 0; i < totalPages; i++){
var tp = i + 1;
if(tp >= page - r && tp <= page + r) fillPage(pageEls[i], i);
}
}
function clearFar(page){
var r = 6;
for(var i = 0; i < totalPages; i++){
var tp = i + 1;
if(tp < page - r || tp > page + r) clearPage(pageEls[i]);
}
}
function buildFlipbook(){
$fb = $('#flipbook').empty();
pageEls = [];
var frag = document.createDocumentFragment();
for(var i = 0; i < totalPages; i++){
var d = document.createElement('div');
pageEls.push(d);
frag.appendChild(d);
}
$fb.append(frag);
var bw = isSingle ? pageW : pageW * 2;
$fb.turn({
width: bw,
height: pageH,
display: isSingle ? 'single' : 'double',
acceleration: true,
gradients: true,
elevation: 50,
duration: 600,
when: {
turning: function(e, page){ populateAround(page); },
turned: function(e, page){
updateToolbar(page);
populateAround(page);
clearFar(page);
try{ localStorage.setItem('epub_page', page); }catch(x){}
}
}
});
populateAround(1);
updateToolbar(1);
}
function destroyFlipbook(){
if($fb){
try{ $fb.turn('destroy'); }catch(x){}
$fb.empty().removeAttr('style');
$fb = null;
}
pageEls = [];
}
/* ================================================================
TOOLBAR
================================================================ */
function updateToolbar(page){
if(isSingle){
$('#pageInfo').text(page + ' / ' + totalPages);
} else {
var view = $fb ? $fb.turn('view') : [0,0];
var l = view[0] || 0, r = view[1] || 0;
var txt = '';
if(l && r) txt = l + '\u2013' + r;
else if(l) txt = '' + l;
else if(r) txt = '' + r;
$('#pageInfo').text(txt + ' / ' + totalPages);
}
$('#progressBar').prop({max: totalPages, value: page});
$('#sr-info').text('Page ' + page + ' of ' + totalPages);
}
/* ================================================================
NAVIGATION
================================================================ */
$('#btnPrev').on('click', function(){ if($fb) $fb.turn('previous'); });
$('#btnNext').on('click', function(){ if($fb) $fb.turn('next'); });
$('#progressBar').on('input', function(){
var v = parseInt(this.value) || 1;
if($fb) $fb.turn('page', Math.max(1, Math.min(totalPages, v)));
});
$(document).on('keydown', function(e){
if(!$fb) return;
if(e.key === 'ArrowRight' || e.key === 'PageDown'){ $fb.turn('next'); showControls(); }
else if(e.key === 'ArrowLeft' || e.key === 'PageUp'){ $fb.turn('previous'); showControls(); }
else if(e.key === '+' || e.key === '=') changeFontSize(2);
else if(e.key === '-') changeFontSize(-2);
});
/* ================================================================
FONT SIZE
================================================================ */
function changeFontSize(delta){
fontSize = Math.max(10, Math.min(40, fontSize + delta));
document.documentElement.style.setProperty('--fs', fontSize + 'px');
repaginate();
}
$('#btnFontDec').on('click', function(){ changeFontSize(-2); });
$('#btnFontInc').on('click', function(){ changeFontSize(2); });
function repaginate(){
if(!allContent) return;
var curPage = 1, ratio = 0;
if($fb){
try{
curPage = $fb.turn('page');
ratio = curPage / Math.max(1, totalPages);
}catch(x){}
}
destroyFlipbook();
measurePages();
buildFlipbook();
if(ratio > 0){
var np = Math.max(1, Math.min(totalPages, Math.round(ratio * totalPages)));
try{ $fb.turn('page', np); }catch(x){}
}
try{ localStorage.setItem('epub_fs', fontSize); }catch(x){}
}
/* ================================================================
DARK MODE
================================================================ */
$('#btnDark').on('click', function(){
isDark = !isDark;
$('body').toggleClass('dark', isDark);
$(this).text(isDark ? '\u2600' : '\u263E');
try{ localStorage.setItem('epub_dark', isDark ? '1' : '0'); }catch(x){}
});
/* ================================================================
CONTROLS VISIBILITY
================================================================ */
var $controls = $('#controls');
function showControls(){
$controls.addClass('show');
clearTimeout(controlsTimer);
controlsTimer = setTimeout(function(){ $controls.removeClass('show'); }, 3500);
}
$(document).on('mousemove', showControls);
document.addEventListener('touchstart', showControls, {passive:true});
/* ================================================================
TOUCH SUPPORT — bridge touch→mouse & swipe/tap fallback
================================================================ */
var touchX = 0, touchY = 0, touchT = 0, touchDragging = false;
function _handleTapSwipe(t){
if(!t || !$fb) return;
var dx = t.clientX - touchX, dy = t.clientY - touchY, dt = Date.now() - touchT;
/* Swipe: fast horizontal > 50px */
if(dt < 400 && Math.abs(dx) > 50 && Math.abs(dx) > Math.abs(dy) * 1.5){
setTimeout(function(){
if($fb && !$fb.turn('animating')){
if(dx < 0) $fb.turn('next'); else $fb.turn('previous');
}
showControls();
}, 60);
return;
}
/* Tap: quick, minimal movement — left/right edge turns page, middle shows controls */
if(dt < 300 && Math.abs(dx) < 15 && Math.abs(dy) < 15){
setTimeout(function(){
if(!$fb) return;
var w = window.innerWidth;
if(!$fb.turn('animating')){
if(t.clientX < w * 0.3){ $fb.turn('previous'); showControls(); }
else if(t.clientX > w * 0.7){ $fb.turn('next'); showControls(); }
else showControls();
} else {
showControls();
}
}, 150);
}
}
if(!$.isTouch){
/* Desktop: turn.js uses mouse events — bridge touch→mouse for drag-to-flip */
function _dispatchMouse(t, type){
t.target.dispatchEvent(new MouseEvent(type, {
bubbles:true, cancelable:true, view:window,
screenX:t.screenX, screenY:t.screenY,
clientX:t.clientX, clientY:t.clientY
}));
}
$(document).on('touchstart', '#flipbook', function(e){
if(e.originalEvent.touches.length !== 1) return;
var t = e.originalEvent.touches[0];
touchX = t.clientX; touchY = t.clientY; touchT = Date.now();
touchDragging = true;
_dispatchMouse(t, 'mouseover');
_dispatchMouse(t, 'mousedown');
});
document.addEventListener('touchmove', function(e){
if(!touchDragging) return;
e.preventDefault();
var t = e.changedTouches[0];
if(t) _dispatchMouse(t, 'mousemove');
}, {passive:false});
$(document).on('touchend touchcancel', function(e){
if(!touchDragging) return;
touchDragging = false;
var t = e.originalEvent.changedTouches[0];
if(t){
_dispatchMouse(t, 'mouseup');
_dispatchMouse(t, 'mouseout');
}
_handleTapSwipe(t);
});
} else {
/* Touch device: turn.js handles corner-drag natively — add swipe/tap */
$(document).on('touchstart', '#flipbook', function(e){
if(e.originalEvent.touches.length !== 1) return;
var t = e.originalEvent.touches[0];
touchX = t.clientX; touchY = t.clientY; touchT = Date.now();
});
$(document).on('touchend', '#flipbook', function(e){
_handleTapSwipe(e.originalEvent.changedTouches[0]);
});
}
/* ================================================================
RESIZE
================================================================ */
var resizeTimer;
window.addEventListener('resize', function(){
clearTimeout(resizeTimer);
resizeTimer = setTimeout(function(){
isSingle = window.innerWidth < 700;
if(allContent) repaginate();
}, 250);
});
/* ================================================================
LOAD EPUB
================================================================ */
var $loadStatus = $('#loadStatus');
var loadStatus = $loadStatus[0];
$('#fileInput').on('change', async function(){
var file = this.files[0];
if(!file) return;
$loadStatus.text('Reading file...');
try {
var ab = await file.arrayBuffer();
epubData = await parseEpub(ab);
$loadStatus.text('Rendering content...');
allContent = '';
for(var i = 0; i < epubData.spine.length; i++){
var html = renderSpineItem(epubData, epubData.spine[i]);
allContent += '<div class="spine-item">' + html + '</div>';
}
document.title = epubData.title + ' \u2014 EPUB Reader';
isSingle = window.innerWidth < 700;
$('#overlay').addClass('hidden');
$('#book').addClass('show');
/* Restore settings */
try{
var sfs = parseInt(localStorage.getItem('epub_fs')) || 18;
if(sfs >= 10 && sfs <= 40) fontSize = sfs;
document.documentElement.style.setProperty('--fs', fontSize + 'px');
if(localStorage.getItem('epub_dark') === '1'){
isDark = true;
$('body').addClass('dark');
$('#btnDark').text('\u2600');
}
}catch(x){}
measurePages();
buildFlipbook();
/* Restore page position */
try{
var sp = parseInt(localStorage.getItem('epub_page')) || 1;
if(sp > 1 && sp <= totalPages) $fb.turn('page', sp);
}catch(x){}
showControls();
} catch(err){
console.error(err);
$loadStatus.text('Error: ' + (err.message || 'Failed to load'));
}
});
})();
</script>
</body>
</html>