/**
* Render the completed PDF to a string.
* If $newSegmentOnly is true and it's not a new document,
* then only appended part of PDF is returned.
*
* @param boolean $newSegmentOnly
* @param resource $outputStream
* @return string
* @throws Zend_Pdf_Exception
*/
public function render($newSegmentOnly = false, $outputStream = null)
{
if ($this->_isNewDocument) {
// Drop full document first time even $newSegmentOnly is set to true
$newSegmentOnly = false;
$this->_isNewDocument = false;
}
// Save document properties if necessary
if ($this->properties != $this->_originalProperties) {
$docInfo = $this->_objFactory->newObject(new Zend_Pdf_Element_Dictionary());
foreach ($this->properties as $key => $value) {
switch ($key) {
case 'Trapped':
switch ($value) {
case true:
$docInfo->$key = new Zend_Pdf_Element_Name('True');
break;
case false:
$docInfo->$key = new Zend_Pdf_Element_Name('False');
break;
case null:
$docInfo->$key = new Zend_Pdf_Element_Name('Unknown');
break;
default:
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Wrong Trapped document property vale: \'' . $value . '\'. Only true, false and null values are allowed.');
break;
}
case 'CreationDate':
// break intentionally omitted
case 'ModDate':
$docInfo->$key = new Zend_Pdf_Element_String((string)$value);
break;
case 'Title':
// break intentionally omitted
case 'Author':
// break intentionally omitted
case 'Subject':
// break intentionally omitted
case 'Keywords':
// break intentionally omitted
case 'Creator':
// break intentionally omitted
case 'Producer':
if (extension_loaded('mbstring') === true) {
$detected = mb_detect_encoding($value);
if ($detected !== 'ASCII') {
$value = "\xfe\xff" . mb_convert_encoding($value, 'UTF-16', $detected);
}
}
$docInfo->$key = new Zend_Pdf_Element_String((string)$value);
break;
default:
// Set property using PDF type based on PHP type
$docInfo->$key = Zend_Pdf_Element::phpToPdf($value);
break;
}
}
$this->_trailer->Info = $docInfo;
}
$this->_dumpPages();
$this->_dumpNamedDestinations();
$this->_dumpOutlines();
// Check, that PDF file was modified
// File is always modified by _dumpPages() now, but future implementations may eliminate this.
if (!$this->_objFactory->isModified()) {
if ($newSegmentOnly) {
// Do nothing, return
return '';
}
if ($outputStream === null) {
return $this->_trailer->getPDFString();
} else {
$pdfData = $this->_trailer->getPDFString();
while ( strlen($pdfData) > 0 && ($byteCount = fwrite($outputStream, $pdfData)) != false ) {
$pdfData = substr($pdfData, $byteCount);
}
return '';
}
}
// offset (from a start of PDF file) of new PDF file segment
$offset = $this->_trailer->getPDFLength();
// Last Object number in a list of free objects
$lastFreeObject = $this->_trailer->getLastFreeObject();
// Array of cross-reference table subsections
$xrefTable = array();
// Object numbers of first objects in each subsection
$xrefSectionStartNums = array();
// Last cross-reference table subsection
$xrefSection = array();
// Dummy initialization of the first element (specail case - header of linked list of free objects).
$xrefSection[] = 0;
$xrefSectionStartNums[] = 0;
// Object number of last processed PDF object.
// Used to manage cross-reference subsections.
// Initialized by zero (specail case - header of linked list of free objects).
$lastObjNum = 0;
if ($outputStream !== null) {
if (!$newSegmentOnly) {
$pdfData = $this->_trailer->getPDFString();
while ( strlen($pdfData) > 0 && ($byteCount = fwrite($outputStream, $pdfData)) != false ) {
$pdfData = substr($pdfData, $byteCount);
}
}
} else {
$pdfSegmentBlocks = ($newSegmentOnly) ? array() : array($this->_trailer->getPDFString());
}
// Iterate objects to create new reference table
foreach ($this->_objFactory->listModifiedObjects() as $updateInfo) {
$objNum = $updateInfo->getObjNum();
if ($objNum - $lastObjNum != 1) {
// Save cross-reference table subsection and start new one
$xrefTable[] = $xrefSection;
$xrefSection = array();
$xrefSectionStartNums[] = $objNum;
}
if ($updateInfo->isFree()) {
// Free object cross-reference table entry
$xrefSection[] = sprintf("%010d %05d f \n", $lastFreeObject, $updateInfo->getGenNum());
$lastFreeObject = $objNum;
} else {
// In-use object cross-reference table entry
$xrefSection[] = sprintf("%010d %05d n \n", $offset, $updateInfo->getGenNum());
$pdfBlock = $updateInfo->getObjectDump();
$offset += strlen($pdfBlock);
if ($outputStream === null) {
$pdfSegmentBlocks[] = $pdfBlock;
} else {
while ( strlen($pdfBlock) > 0 && ($byteCount = fwrite($outputStream, $pdfBlock)) != false ) {
$pdfBlock = substr($pdfBlock, $byteCount);
}
}
}
$lastObjNum = $objNum;
}
// Save last cross-reference table subsection
$xrefTable[] = $xrefSection;
// Modify first entry (specail case - header of linked list of free objects).
$xrefTable[0][0] = sprintf("%010d 65535 f \n", $lastFreeObject);
$xrefTableStr = "xref\n";
foreach ($xrefTable as $sectId => $xrefSection) {
$xrefTableStr .= sprintf("%d %d \n", $xrefSectionStartNums[$sectId], count($xrefSection));
foreach ($xrefSection as $xrefTableEntry) {
$xrefTableStr .= $xrefTableEntry;
}
}
$this->_trailer->Size->value = $this->_objFactory->getObjectCount();
$pdfBlock = $xrefTableStr
. $this->_trailer->toString()
. "startxref\n" . $offset . "\n"
. "%%EOF\n";
$this->_objFactory->cleanEnumerationShiftCache();
if ($outputStream === null) {
$pdfSegmentBlocks[] = $pdfBlock;
return implode('', $pdfSegmentBlocks);
} else {
while ( strlen($pdfBlock) > 0 && ($byteCount = fwrite($outputStream, $pdfBlock)) != false ) {
$pdfBlock = substr($pdfBlock, $byteCount);
}
return '';
}
}
/**
* Convert PHP value into PDF element.
*
* @param mixed $input
* @return Zend_Pdf_Element
*/
public static function phpToPdf($input)
{
if (is_numeric($input)) {
//require_once 'Zend/Pdf/Element/Numeric.php';
return new Zend_Pdf_Element_Numeric($input);
} else {
if (is_bool($input)) {
//require_once 'Zend/Pdf/Element/Boolean.php';
return new Zend_Pdf_Element_Boolean($input);
} else {
if (is_array($input)) {
$pdfElementsArray = array();
$isDictionary = false;
foreach ($input as $key => $value) {
if (is_string($key)) {
$isDictionary = true;
}
$pdfElementsArray[$key] = Zend_Pdf_Element::phpToPdf($value);
}
if ($isDictionary) {
//require_once 'Zend/Pdf/Element/Dictionary.php';
return new Zend_Pdf_Element_Dictionary($pdfElementsArray);
} else {
//require_once 'Zend/Pdf/Element/Array.php';
return new Zend_Pdf_Element_Array($pdfElementsArray);
}
} else {
//require_once 'Zend/Pdf/Element/String.php';
return new Zend_Pdf_Element_String((string) $input);
}
}
}
}
public function render($newSegmentOnly = false, $outputStream = null)
{
if ($this->_isNewDocument) {
$newSegmentOnly = false;
$this->_isNewDocument = false;
}
if ($this->properties != $this->_originalProperties) {
$docInfo = $this->_objFactory->newObject(new Zend_Pdf_Element_Dictionary());
foreach ($this->properties as $key => $value) {
switch ($key) {
case 'Trapped':
switch ($value) {
case true:
$docInfo->{$key} = new Zend_Pdf_Element_Name('True');
break;
case false:
$docInfo->{$key} = new Zend_Pdf_Element_Name('False');
break;
case null:
$docInfo->{$key} = new Zend_Pdf_Element_Name('Unknown');
break;
default:
throw new Zend_Pdf_Exception('Wrong Trapped document property vale: \'' . $value . '\'. Only true, false and null values are allowed.');
break;
}
case 'CreationDate':
case 'ModDate':
$docInfo->{$key} = new Zend_Pdf_Element_String((string) $value);
break;
case 'Title':
case 'Author':
case 'Subject':
case 'Keywords':
case 'Creator':
case 'Producer':
if (extension_loaded('mbstring') === true) {
$detected = mb_detect_encoding($value);
if ($detected !== 'ASCII') {
$value = "■ " . mb_convert_encoding($value, 'UTF-16', $detected);
}
}
$docInfo->{$key} = new Zend_Pdf_Element_String((string) $value);
break;
default:
$docInfo->{$key} = Zend_Pdf_Element::phpToPdf($value);
break;
}
}
$this->_trailer->Info = $docInfo;
}
$this->_dumpPages();
$this->_dumpNamedDestinations();
$this->_dumpOutlines();
if (!$this->_objFactory->isModified()) {
if ($newSegmentOnly) {
return '';
}
if ($outputStream === null) {
return $this->_trailer->getPDFString();
} else {
$pdfData = $this->_trailer->getPDFString();
while (strlen($pdfData) > 0 && ($byteCount = fwrite($outputStream, $pdfData)) != false) {
$pdfData = substr($pdfData, $byteCount);
}
return '';
}
}
$offset = $this->_trailer->getPDFLength();
$lastFreeObject = $this->_trailer->getLastFreeObject();
$xrefTable = array();
$xrefSectionStartNums = array();
$xrefSection = array();
$xrefSection[] = 0;
$xrefSectionStartNums[] = 0;
$lastObjNum = 0;
if ($outputStream !== null) {
if (!$newSegmentOnly) {
$pdfData = $this->_trailer->getPDFString();
while (strlen($pdfData) > 0 && ($byteCount = fwrite($outputStream, $pdfData)) != false) {
$pdfData = substr($pdfData, $byteCount);
}
}
} else {
$pdfSegmentBlocks = $newSegmentOnly ? array() : array($this->_trailer->getPDFString());
}
foreach ($this->_objFactory->listModifiedObjects() as $updateInfo) {
$objNum = $updateInfo->getObjNum();
if ($objNum - $lastObjNum != 1) {
$xrefTable[] = $xrefSection;
$xrefSection = array();
$xrefSectionStartNums[] = $objNum;
}
if ($updateInfo->isFree()) {
$xrefSection[] = sprintf("%010d %05d f \n", $lastFreeObject, $updateInfo->getGenNum());
$lastFreeObject = $objNum;
} else {
$xrefSection[] = sprintf("%010d %05d n \n", $offset, $updateInfo->getGenNum());
$pdfBlock = $updateInfo->getObjectDump();
$offset += strlen($pdfBlock);
if ($outputStream === null) {
$pdfSegmentBlocks[] = $pdfBlock;
} else {
while (strlen($pdfBlock) > 0 && ($byteCount = fwrite($outputStream, $pdfBlock)) != false) {
$pdfBlock = substr($pdfBlock, $byteCount);
}
}
}
$lastObjNum = $objNum;
}
$xrefTable[] = $xrefSection;
$xrefTable[0][0] = sprintf("%010d 65535 f \n", $lastFreeObject);
$xrefTableStr = "xref\n";
foreach ($xrefTable as $sectId => $xrefSection) {
$xrefTableStr .= sprintf("%d %d \n", $xrefSectionStartNums[$sectId], count($xrefSection));
foreach ($xrefSection as $xrefTableEntry) {
$xrefTableStr .= $xrefTableEntry;
}
}
$this->_trailer->Size->value = $this->_objFactory->getObjectCount();
$pdfBlock = $xrefTableStr . $this->_trailer->toString() . "startxref\n" . $offset . "\n" . "%%EOF\n";
$this->_objFactory->cleanEnumerationShiftCache();
if ($outputStream === null) {
$pdfSegmentBlocks[] = $pdfBlock;
return implode('', $pdfSegmentBlocks);
} else {
while (strlen($pdfBlock) > 0 && ($byteCount = fwrite($outputStream, $pdfBlock)) != false) {
$pdfBlock = substr($pdfBlock, $byteCount);
}
return '';
}
}
