<?php
#---------------------------------------------------------------------------------------
# Copyright (c) 2001-2012 by PDFTron Systems Inc. All Rights Reserved.
# Consult legal.txt regarding legal and license information.
#---------------------------------------------------------------------------------------
include("../../../Lib/PDFNetPHP.php");

# This sample illustrates how to edit existing text strings.

# Relative path to the folder containing the test files.
$input_path = getcwd()."/../../TestFiles/";
$output_path = $input_path."Output/";

	PDFNet::Initialize();
	echo nl2br("-------------------------------------------------\n");
	
	$doc = new PDFDoc($input_path."newsletter.pdf");
	$doc->InitSecurityHandler();

	$writer = new ElementWriter();
	$reader = new ElementReader();

	$num_pages = $doc->GetPageCount();
	for($i = 1; $i <= $num_pages; ++$i)
	{
		$itr = $doc->GetPageIterator($i);
		$page = $itr->Current();			
		$reader->Begin($page);

		$new_page = $doc->PageCreate();
		$next_page = $itr;
		$next_page->Next(); 
		$doc->PageInsert($next_page, $new_page );

		$writer->Begin($new_page);
		while (($element = $reader->Next()) != null)     // Read page contents
		{
			if ($element->GetType() == Element::e_text) 
			{
				// Set all text to blue color.
				$gs = $element->GetGState();

				$gs->SetFillColorSpace(ColorSpace::CreateDeviceRGB());
				$gs->SetFillColor(new ColorPt(0.0, 0.0, 1.0));

				$text_arr = $element->GetTextData();				
				$size = $element->GetTextDataSize();

				$text_arr_new = "";

				$bUnicode = False;
				if ($size > 2) {
                   			if (ord($text_arr[0]) == 254 and ord($text_arr[1]) == 255) {
                        			$bUnicode = True;
                        			for ($n = 0; $n < $size; $n++)
						{
							//copy Unicode string as is
							$text_arr_new .= $text_arr[$n];
						}
					}
				}
				if (!$bUnicode) {
					for ($n = 0; $n < $size; $n++)
					{
						//replace 'c' with 'k' and 'k' with 'c'
						switch (ord($text_arr[$n]))
						{
						case 99:
							$text_arr_new .= chr(107);
							break;
						case 107:
							$text_arr_new .= chr(99);
							break;
						default:
							$text_arr_new .= $text_arr[$n];
						}
					}
				}
				$element->SetTextData($text_arr_new, $size);
				$writer->WriteElement($element);
			}
			else if ($element->GetType() == Element::e_image) 
			{
				// remove all images
				continue;
			}
			else
			{	
				$writer->WriteElement($element);
			}
		}
		$writer->End();
		$reader->End();
			
		$new_page->SetMediaBox($page->GetCropBox());
		$doc->PageRemove($doc->GetPageIterator($i));
	}
	$doc->Save($output_path."newsletter_ed.pdf", SDFDoc::e_remove_unused);
	echo nl2br("Done. Result saved in newsletter_ed.pdf...\n");
?>