/**
* Build the Table of Contents. This is not strictly necessary, as most eReaders will build it from the navigation structure in the .ncx file.
*
* @param string $cssFileName Include a link to this css file in the TOC html.
* @param string $tocCSSClass The TOC is a <div>, if you need special formatting, you can add a css class for that div. Default is "toc".
* @param string $title Title of the Table of contents. Default is "Table of Contents". Use this for ie. languages other than English.
* @param bool $addReferences include reference pages in the TOC, using the $referencesOrder array to determine the order of the pages in the TOC. Default is TRUE.
* @param bool $addToIndex Add the TOC to the NCX index at the current leve/position. Default is FALSE
* @param string $tocFileName Change the default name of the TOC file. The default is "TOC.xhtml"
*
* @return bool
*/
function buildTOC($cssFileName = null, $tocCSSClass = "toc", $title = "Table of Contents", $addReferences = true, $addToIndex = false, $tocFileName = "TOC.xhtml")
{
if ($this->isFinalized) {
return false;
}
$this->buildTOC = true;
$this->tocTitle = $title;
$this->tocFileName = FileHelper::normalizeFileName($tocFileName);
if (!empty($cssFileName)) {
$this->tocCssFileName = FileHelper::normalizeFileName($cssFileName);
}
$this->tocCSSClass = $tocCSSClass;
$this->tocAddReferences = $addReferences;
$this->opf->addReference(Reference::TABLE_OF_CONTENTS, $title, $this->tocFileName);
if (!($this->tocNavAdded = true)) {
$this->opf->addItemRef("ref_" . Reference::TABLE_OF_CONTENTS, false);
if ($addToIndex) {
$navPoint = new NavPoint(StringHelper::decodeHtmlEntities($title), $this->tocFileName, "ref_" . Reference::TABLE_OF_CONTENTS);
$this->ncx->addNavPoint($navPoint);
} else {
$this->ncx->referencesList[Reference::TABLE_OF_CONTENTS] = $this->tocFileName;
$this->ncx->referencesName[Reference::TABLE_OF_CONTENTS] = $title;
}
}
return true;
}
/**
* Get an image from a file or url, return it resized if the image exceeds the $maxImageWidth or $maxImageHeight directives.
*
* The return value is an array.
* ['width'] is the width of the image.
* ['height'] is the height of the image.
* ['mime'] is the mime type of the image. Resized images are always in jpeg format.
* ['image'] is the image data.
* ['ext'] is the extension of the image file.
*
* @param EPub $book
* @param string $imageSource path or url to file.
*
* @return array|bool
* @throws \Exception
*/
public static function getImage($book, $imageSource)
{
$width = -1;
$height = -1;
$mime = "application/octet-stream";
$ext = "";
$image = FileHelper::getFileContents($imageSource);
$ratio = 1;
if ($image !== false && strlen($image) > 0) {
if (BinStringStatic::startsWith(trim($image), '<svg') || (BinStringStatic::startsWith(trim($image), '<?xml') || strpos($image, '<svg') > 0)) {
// SVG image.
$xml = simplexml_load_string($image);
$attr = $xml->attributes();
$meta = ImageHelper::handleSVGAttribs($xml);
$mime = "image/svg+xml";
$ext = "svg";
$width = $meta['width'];
$height = $meta['height'];
$ratio = ImageHelper::getImageScale($width, $height, $book->maxImageWidth, $book->maxImageHeight);
if ($ratio < 1) {
$attr->width = $width * $ratio;
$attr->height = $height * $ratio;
}
$image = $xml->asXML();
} else {
$imageFile = imagecreatefromstring($image);
if ($imageFile !== false) {
$width = ImageSX($imageFile);
$height = ImageSY($imageFile);
}
if (self::isGdInstalled()) {
@($type = exif_imagetype($imageSource));
$mime = image_type_to_mime_type($type);
}
if ($mime === "application/octet-stream") {
$mime = ImageHelper::getImageFileTypeFromBinary($image);
}
if ($mime === "application/octet-stream") {
$mime = MimeHelper::getMimeTypeFromUrl($imageSource);
}
}
} else {
return false;
}
if ($width <= 0 || $height <= 0) {
return false;
}
if ($mime !== "image/svg+xml" && self::isGdInstalled()) {
$ratio = ImageHelper::getImageScale($width, $height, $book->maxImageWidth, $book->maxImageHeight);
if ($ratio < 1 || empty($mime)) {
if ($mime == "image/png" || $book->isGifImagesEnabled === false && $mime == "image/gif") {
$image_o = imagecreatefromstring($image);
$image_p = imagecreatetruecolor($width * $ratio, $height * $ratio);
imagealphablending($image_p, false);
imagesavealpha($image_p, true);
imagealphablending($image_o, true);
imagecopyresampled($image_p, $image_o, 0, 0, 0, 0, $width * $ratio, $height * $ratio, $width, $height);
ob_start();
imagepng($image_p, null, 9);
$image = ob_get_contents();
ob_end_clean();
imagedestroy($image_o);
imagedestroy($image_p);
$ext = "png";
} else {
if ($book->isGifImagesEnabled !== false && $mime == "image/gif") {
$tFileD = tempnam("BewareOfGeeksBearingGifs", "grD");
ResizeGif::ResizeByRatio($imageSource, $tFileD, $ratio);
$image = file_get_contents($tFileD);
unlink($tFileD);
} else {
$image_o = imagecreatefromstring($image);
$image_p = imagecreatetruecolor($width * $ratio, $height * $ratio);
imagecopyresampled($image_p, $image_o, 0, 0, 0, 0, $width * $ratio, $height * $ratio, $width, $height);
ob_start();
imagejpeg($image_p, null, 80);
$image = ob_get_contents();
ob_end_clean();
imagedestroy($image_o);
imagedestroy($image_p);
$mime = "image/jpeg";
$ext = "jpg";
}
}
}
}
if ($ext === "") {
static $mimeToExt = array('image/jpeg' => 'jpg', 'image/gif' => 'gif', 'image/png' => 'png', 'image/svg+xml' => "svg");
if (isset($mimeToExt[$mime])) {
$ext = $mimeToExt[$mime];
}
}
$rv = array();
$rv['width'] = $width * $ratio;
$rv['height'] = $height * $ratio;
$rv['mime'] = $mime;
$rv['image'] = $image;
$rv['ext'] = $ext;
return $rv;
}
/**
* Get file contents, using curl if available, else file_get_contents
*
* @param string $source
* @param bool $toTempFile
*
* @return bool|mixed|null|string
*/
public static function getFileContents($source, $toTempFile = false)
{
$isExternal = preg_match('#^(http|ftp)s?://#i', $source) == 1;
if ($isExternal && FileHelper::getIsCurlInstalled()) {
$ch = curl_init();
$outFile = null;
$fp = null;
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_URL, str_replace(" ", "%20", $source));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_BUFFERSIZE, 4096);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
// follow redirects
curl_setopt($ch, CURLOPT_ENCODING, "");
// handle all encodings
curl_setopt($ch, CURLOPT_USERAGENT, "EPub (Version " . EPub::VERSION . ") by A. Grandt");
// who am i
curl_setopt($ch, CURLOPT_AUTOREFERER, true);
// set referer on redirect
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 120);
// timeout on connect
curl_setopt($ch, CURLOPT_TIMEOUT, 120);
// timeout on response
curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
// stop after 10 redirects
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
// Disabled SSL Cert checks
if ($toTempFile) {
$outFile = tempnam(sys_get_temp_dir(), "EPub_v" . EPub::VERSION . "_");
$fp = fopen($outFile, "w+b");
curl_setopt($ch, CURLOPT_FILE, $fp);
$res = curl_exec($ch);
$info = curl_getinfo($ch);
curl_close($ch);
fclose($fp);
} else {
$res = curl_exec($ch);
$info = curl_getinfo($ch);
curl_close($ch);
}
if ($info['http_code'] == 200 && $res != false) {
if ($toTempFile) {
return $outFile;
}
return $res;
}
return false;
}
if (FileHelper::getIsFileGetContentsInstalled() && (!$isExternal || FileHelper::getIsFileGetContentsExtInstalled())) {
@($data = file_get_contents($source));
return $data;
}
return false;
}