'1 (normal)', 2 => '2', 4 => '4', 6 => '6', 9 => '9'] as $n => $label) {
$opts .= '';
}
return '';
}
function ext_lp_args(string $ext): array {
$n = (int)($_POST['nup'] ?? 1);
return (EXT_PAGES_PER_SHEET && in_array($n, [2, 4, 6, 9], true)) ? ['-o', 'number-up=' . $n] : [];
}
function ext_file_html(string $name): string {
if (!EXT_PREVIEW) { return ''; }
return 'Preview';
}
/**
* Called for every upload. Returns null to leave the file alone, ['error' => msg] on failure,
* or ['path' => converted pdf, 'name' => new filename] after converting an Office file.
*/
function ext_convert(string $tmp, string $orig): ?array {
$ext = strtolower(pathinfo($orig, PATHINFO_EXTENSION));
if (!EXT_OFFICE || !in_array($ext, EXT_OFFICE_TYPES, true)) { return null; }
if (!is_executable(EXT_SOFFICE)) { return ['error' => 'can’t be converted: LibreOffice isn’t installed on the server.']; }
@set_time_limit(EXT_TIMEOUT * 2);
$tmpdir = sys_get_temp_dir();
$profile = $tmpdir . '/print-lo-profile';
$work = $tmpdir . '/print-lo-' . bin2hex(random_bytes(6));
$lock = fopen($tmpdir . '/print-lo.lock', 'c');
if ($lock) { flock($lock, LOCK_EX); } // LibreOffice allows one run per profile at a time
$result = ['error' => 'could not be converted to PDF. Try saving it as a PDF first.'];
if (@mkdir($work, 0700, true) && copy($tmp, $work . '/document.' . $ext)) {
$cmd = ['/usr/bin/timeout', '-k', '5', (string)EXT_TIMEOUT, EXT_SOFFICE,
'-env:UserInstallation=file://' . $profile, '--headless', '--norestore',
'--convert-to', 'pdf', '--outdir', $work, $work . '/document.' . $ext];
$p = @proc_open($cmd, [1 => ['pipe', 'w'], 2 => ['pipe', 'w']], $pipes, $work,
['PATH' => '/usr/bin:/bin', 'HOME' => $work, 'LC_ALL' => 'C.UTF-8']);
if (is_resource($p)) {
stream_get_contents($pipes[1]); stream_get_contents($pipes[2]);
fclose($pipes[1]); fclose($pipes[2]); proc_close($p);
}
$pdf = $work . '/document.pdf';
$dest = tempnam($tmpdir, 'prt');
if (is_file($pdf) && filesize($pdf) > 0 && $dest !== false && copy($pdf, $dest)) {
$result = ['path' => $dest, 'name' => cut(pathinfo($orig, PATHINFO_FILENAME), 80) . '.pdf'];
} else {
ext_rmdir($profile); // a crashed run can leave a broken profile; start fresh next time
}
}
ext_rmdir($work);
if ($lock) { flock($lock, LOCK_UN); fclose($lock); }
return $result;
}
function ext_css(): string {
return '[hidden]{display:none!important}'
. '@media (max-width:480px){.file{flex-wrap:wrap}.fn{flex-basis:100%}}'
. '#pv{position:fixed;inset:0;z-index:50;display:flex;flex-direction:column;background:var(--bg)}'
. '.pvbar{display:flex;align-items:center;gap:8px;padding:max(10px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) 10px max(12px,env(safe-area-inset-left));background:var(--card);border-bottom:1px solid var(--line)}'
. '.pvbar b{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}'
. '.pvbar span{color:var(--mute);font-size:.88rem;white-space:nowrap}'
. '#pvbody{flex:1;overflow:auto;padding:12px;text-align:center;-webkit-overflow-scrolling:touch}'
. '#pvbody canvas,#pvbody img{display:block;height:auto;max-width:100%;margin:0 auto 12px;background:#fff;border:1px solid var(--line)}'
. '#pvbody pre{margin:0 auto;max-width:90ch;text-align:left;white-space:pre-wrap;overflow-wrap:anywhere;font:.9rem/1.45 ui-monospace,monospace;color:var(--ink)}';
}
/** Preview overlay + small scripts (remembers each device's option choices). */
function ext_page_html(): string {
$preview = !EXT_PREVIEW ? '' : <<<'HTML'
HTML;
$remember = <<<'HTML'
HTML;
return $preview . "\n" . $remember;
}
// ---------- Internals ----------
function ext_serve(string $name): void {
$path = stored_path($name);
$ext = $path === null ? '' : strtolower(pathinfo($path, PATHINFO_EXTENSION));
if ($path === null || !isset(ALLOWED[$ext])) { http_response_code(404); exit('Not found'); }
header_remove('Content-Security-Policy');
header('Content-Type: ' . ALLOWED[$ext][0] . ($ext === 'txt' ? '; charset=utf-8' : ''));
header('Content-Length: ' . (string)filesize($path));
header("Content-Disposition: inline; filename*=UTF-8''" . rawurlencode(basename($path)));
readfile($path);
exit;
}
function ext_asset(string $name): void {
$file = EXT_VENDOR . '/' . $name;
if (!in_array($name, ['pdf.min.mjs', 'pdf.worker.min.mjs'], true) || !is_file($file)) { http_response_code(404); exit('Not found'); }
header_remove('Content-Security-Policy');
header('Content-Type: text/javascript; charset=utf-8');
header('Cache-Control: public, max-age=86400');
header('Content-Length: ' . (string)filesize($file));
readfile($file);
exit;
}
function ext_rmdir(string $dir): void {
if (!is_dir($dir)) { return; }
$it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS), RecursiveIteratorIterator::CHILD_FIRST);
foreach ($it as $f) { ($f->isDir() && !$f->isLink()) ? @rmdir($f->getPathname()) : @unlink($f->getPathname()); }
@rmdir($dir);
}