<?php
//
// FPDI - Version 1.1
//
// Copyright 2004,2005 Setasign - Jan Slabon
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
if (!defined ('PDF_TYPE_NULL'))
define ('PDF_TYPE_NULL', 0);
if (!defined ('PDF_TYPE_NUMERIC'))
define ('PDF_TYPE_NUMERIC', 1);
if (!defined ('PDF_TYPE_TOKEN'))
define ('PDF_TYPE_TOKEN', 2);
if (!defined ('PDF_TYPE_HEX'))
define ('PDF_TYPE_HEX', 3);
if (!defined ('PDF_TYPE_STRING'))
define ('PDF_TYPE_STRING', 4);
if (!defined ('PDF_TYPE_DICTIONARY'))
define ('PDF_TYPE_DICTIONARY', 5);
if (!defined ('PDF_TYPE_ARRAY'))
define ('PDF_TYPE_ARRAY', 6);
if (!defined ('PDF_TYPE_OBJDEC'))
define ('PDF_TYPE_OBJDEC', 7);
if (!defined ('PDF_TYPE_OBJREF'))
define ('PDF_TYPE_OBJREF', 8);
if (!defined ('PDF_TYPE_OBJECT'))
define ('PDF_TYPE_OBJECT', 9);
if (!defined ('PDF_TYPE_STREAM'))
define ('PDF_TYPE_STREAM', 10);
require_once("wrapper_functions.php");
require_once("pdf_parser.php");
class fpdi_pdf_parser extends pdf_parser {
/**
* Pages
* Index beginns at 0
*
* @var array
*/
var $pages;
/**
* Page count
* @var integer
*/
var $page_count;
/**
* actual page number
* @var integer
*/
var $pageno;
/**
* PDF Version of imported Document
* @var string
*/
var $pdfVersion;
/**
* FPDI Reference
* @var object
*/
var $fpdi;
/**
* Constructor
*
* @param string $filename Source-Filename
* @param object $fpdi Object of type fpdi
*/
function __construct($filename,&$fpdi) {
$this->fpdi =& $fpdi;
$this->filename = $filename;
parent::__construct($filename);
// Get Info
$this->getInfo();
// resolve Pages-Dictonary
$pages = $this->pdf_resolve_object($this->c, $this->root[1][1]['/Pages']);
// Read pages
$this->read_pages($this->c, $pages, $this->pages);
// count pages;
$this->page_count = count($this->pages);
}
/**
* Overwrite parent::error()
*
* @param string $msg Error-Message
*/
function error($msg) {
$this->fpdi->error($msg);
}
/**
* Get pagecount from sourcefile
*
* @return int
*/
function getPageCount() {
return $this->page_count;
}
/**
* Set pageno
*
* @param int $pageno Pagenumber to use
*/
function setPageno($pageno) {
$pageno-=1;
if ($pageno < 0 || $pageno >= $this->getPageCount()) {
$this->fpdi->error("Pagenumber is wrong!");
}
$this->pageno = $pageno;
}
/**
* Get page-resources from current page
*
* @return array
*/
function getPageResources() {
return $this->_getPageResources($this->pages[$this->pageno]);
}
/**
* Get page-resources from /Page
*
* @param array $obj Array of pdf-data
*/
function _getPageResources ($obj) { // $obj = /Page
$obj = $this->pdf_resolve_object($this->c, $obj);
// If the current object has a resources
// dictionary associated with it, we use
// it. Otherwise, we move back to its
// parent object.
if (isset ($obj[1][1]['/Resources'])) {
$res = $this->pdf_resolve_object($this->c, $obj[1][1]['/Resources']);
if ($res[0] == PDF_TYPE_OBJECT)
return $res[1];
return $res;
} else {
if (!isset ($obj[1][1]['/Parent'])) {
return false;
} else {
$res = $this->_getPageResources($obj[1][1]['/Parent']);
if ($res[0] == PDF_TYPE_OBJECT)
return $res[1];
return $res;
}
}
}
function getInfo() {
$avail_infos = array("Title", "Author", "Subject", "Keywords", "Creator", "Producer", "CreationDate", "ModDate", "Trapped");
$_infos = $this->pdf_resolve_object($this->c,$this->xref['trailer'][1]['/Info']);
$infos = array();
foreach ($avail_infos AS $info) {
if (isset($_infos[1][1]["/".$info])) {
if ($_infos[1][1]["/".$info][0] == PDF_TYPE_STRING) {
$infos[$info] = $this->deescapeString($_infos[1][1]["/".$info][1]);
} else if ($_infos[1][1]["/".$info][0] == PDF_TYPE_HEX) {
$infos[$info] = $this->hex2String($_infos[1][1]["/".$info][1]);
}
}
}
$this->infos = $infos;
}
/**
* Rebuilds a hexstring to string
*
* @param string $hex hexstring
* @return string
*/
function hex2String($hex) {
$endian = false;
if (preg_match("/^FEFF/",$hex)) { // is utf-16 aka big endian
$i = 4;
$endian = "big";
} else if (preg_match("/^FFFE/",$hex)) { // is utf-16 aka little endian
$i = 4;
$endian = "little";
} else {
$i = 0;
}
$s = "";
$l = strlen($hex);
for (; $i < $l; $i+=2) {
if (!$endian) {
$s .= chr(hexdec($hex[$i].(isset($hex[$i+1]) ? $hex[$i+1] : '0')));
} else {
if ($endian == "big") {
$_c = $hex[$i].$hex[$i+1];
$i+=2;
$c = $hex[$i].$hex[$i+1];
if ($_c != "00") {
$s .= "?";
continue;
} else {
$s .= chr(hexdec($c));
continue;
}
} else if ($endian == "little") {
$c = $hex[$i].$hex[$i+1];
$i+=2;
$_c = $hex[$i].$hex[$i+1];
if ($_c != "00") {
$s .= "?";
continue;
} else {
$s .= chr(hexdec($c));
continue;
}
}
}
}
return $s;
}
function deescapeString($s) {
$ret = preg_replace_callback(
'/\\\(\d{1,3})/',
function ($treffer) {
return chr(octdec($treffer[0]));
},
$s
);
$torepl = array(
"/\\\\\(/" => "(",
"/\\\\\)/" => ")");
return preg_replace(array_keys($torepl),$torepl,$ret);
/*
$torepl = array("/\\\(\d{1,3})/e" => "chr(octdec(\\1))",
"/\\\\\(/" => "(",
"/\\\\\)/" => ")");
return preg_replace(array_keys($torepl),$torepl,$s);*/
}
/**
* Get content of current page
*
* If more /Contents is an array, the streams are concated
*
* @return string
*/
function getContent() {
$buffer = "";
$contents = $this->getPageContent($this->pages[$this->pageno][1][1]['/Contents']);
foreach($contents AS $tmp_content) {
$buffer .= $this->rebuildContentStream($tmp_content);
}
return $buffer;
}
/**
* Resolve all content-objects
*
* @param array $content_ref
* @return array
*/
function getPageContent($content_ref) {
$contents = array();
if ($content_ref[0] == PDF_TYPE_OBJREF) {
$content = $this->pdf_resolve_object($this->c, $content_ref);
if ($content[1][0] == PDF_TYPE_ARRAY) {
$contents = $this->getPageContent($content[1]);
} else {
$contents[] = $content;
}
} else if ($content_ref[0] == PDF_TYPE_ARRAY) {
foreach ($content_ref[1] AS $tmp_content_ref) {
$contents = array_merge($contents,$this->getPageContent($tmp_content_ref));
}
}
return $contents;
}
/**
* Rebuild content-streams
* only non-compressed streams and /FlateDecode are ready!
*
* @param array $obj
* @return string
*/
function rebuildContentStream($obj) {
$filters = array();
if (isset($obj[1][1]['/Filter'])) {
$_filter = $obj[1][1]['/Filter'];
if ($_filter[0] == PDF_TYPE_TOKEN) {
$filters[] = $_filter;
} else if ($_filter[0] == PDF_TYPE_ARRAY) {
$filters = $_filter[1];
}
}
$stream = $obj[2][1];
foreach ($filters AS $_filter) {
switch ($_filter[1]) {
case "/FlateDecode":
if (function_exists('gzuncompress')) {
$stream = @gzuncompress($stream);
} else {
$this->fpdi->error(sprintf("To handle %s filter, please compile php with zlib support.",$_filter[1]));
}
if ($stream === false) {
$this->fpdi->error("Error while decompressing string.");
}
break;
case "/LZWDecode":
@include_once("decoders/lzw.php");
if (class_exists("LZWDecode")) {
$lzwdec = new LZWDecode($this->fpdi);
$stream = $lzwdec->decode($stream);
} else {
$this->fpdi->error(sprintf("Unsupported Filter: %s",$_filter[1]));
}
break;
case "/ASCII85Decode":
@include_once("decoders/ascii85.php");
if (class_exists("ASCII85Decode")) {
$ascii85 = new ASCII85Decode($this->fpdi);
$stream = $ascii85->decode(trim($stream));
} else {
$this->fpdi->error(sprintf("Unsupported Filter: %s",$_filter[1]));
}
break;
case null:
$stream = $stream;
break;
default:
$this->fpdi->error(sprintf("Unsupported Filter: %s",$_filter[1]));
}
}
return $stream;
}
/**
* Get MediaBox
*
* gets an array that describes the size of a page.
*
* @param integer $pageno
* @return array @see getPageBox()
*/
function getPageMediaBox($pageno) {
return $this->getPageBox($this->pages[$pageno-1],"/MediaBox");
}
/**
* Get a Box from a page
* Arrayformat is same as used by fpdf_tpl
*
* @param array $page a /Page
* @param string $box_index Type of Box @see getPageBoxes()
* @return array
*/
function getPageBox($page, $box_index) {
$page = $this->pdf_resolve_object($this->c,$page);
$box = null;
if (isset($page[1][1][$box_index]))
$box =& $page[1][1][$box_index];
if (!is_null($box) && $box[0] == PDF_TYPE_OBJREF) {
$tmp_box = $this->pdf_resolve_object($this->c,$box);
$box = $tmp_box[1];
}
if (!is_null($box) && $box[0] == PDF_TYPE_ARRAY) {
$b =& $box[1];
return array("x" => $b[0][1]/$this->fpdi->k,
"y" => $b[1][1]/$this->fpdi->k,
"w" => $b[2][1]/$this->fpdi->k,
"h" => $b[3][1]/$this->fpdi->k);
} else if (!isset ($page[1][1]['/Parent'])) {
return false;
} else {
return $this->getPageBox($this->pdf_resolve_object($this->c, $page[1][1]['/Parent']), $box_index);
}
}
/**
* Get all Boxes from /Page
*
* @param array a /Page
* @return array
*/
function getPageBoxes($page) {
$_boxes = array("/MediaBox","/CropBox","/BleedBox","/TrimBox","/ArtBox");
$boxes = array();
foreach($_boxes AS $box) {
if ($_box = $this->getPageBox($page,$box)) {
$boxes[$box] = $_box;
}
}
return $boxes;
}
/**
* Read all /Page(es)
*
* @param object pdf_context
* @param array /Pages
* @param array the result-array
*/
function read_pages (&$c, &$pages, &$result) {
// Get the kids dictionary
$kids = $this->pdf_resolve_object ($c, $pages[1][1]['/Kids']);
if (!is_array($kids))
$this->fpdi->Error("Cannot find /Kids in current /Page-Dictionary");
foreach ($kids[1] as $v) {
$pg = $this->pdf_resolve_object ($c, $v);
#print_r($pg);
if ($pg[1][1]['/Type'][1] === '/Pages') {
// If one of the kids is an embedded
// /Pages array, resolve it as well.
$this->read_pages ($c, $pg, $result);
} else {
$result[] = $pg;
}
}
}
/**
* Get PDF-Version
*
* And reset the PDF Version used in FPDI if needed
*/
function getPDFVersion() {
parent::getPDFVersion();
if (isset($this->fpdi->importVersion) && $this->pdfVersion > $this->fpdi->importVersion) {
$this->fpdi->importVersion = $this->pdfVersion;
}
}
}
?>