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