PDFPage

1//
2// Copyright (c) 2001-2021 by PDFTron Systems Inc. All Rights Reserved.
3//
4
5using System;
6using System.IO;
7using System.Collections;
8using pdftron;
9using pdftron.Common;
10using pdftron.Filters;
11using pdftron.SDF;
12using pdftron.PDF;
13
14using NUnit.Framework;
15
16namespace MiscellaneousSamples
17{
18	/// <summary>
19	/// Summary description for Class1.
20	/// </summary>
21	[TestFixture]
22	public class PDFPageTest
23	{
24		
25		/// <summary>
26		/// The main entry point for the application.
27		/// </summary>
28		[Test]
29		public static void Sample()
30		{
31
32			// Relative path to the folder containing test files.
33			const string input_path =  "TestFiles/";
34			
35			// Sample 1 - Split a PDF document into multiple pages
36			try
37			{
38				Console.WriteLine("_______________________________________________");
39				Console.WriteLine("Sample 1 - Split a PDF document into multiple pages...");
40				Console.WriteLine("Opening the input pdf...");
41
42				using (PDFDoc in_doc = new PDFDoc(Utils.GetAssetTempFile(input_path + "newsletter.pdf")))
43				{
44					in_doc.InitSecurityHandler();
45
46					int page_num = in_doc.GetPageCount();
47					for (int i = 1; i <= page_num; ++i) 
48					{
49						using (PDFDoc new_doc = new PDFDoc()) 
50						{
51							new_doc.InsertPages(0, in_doc, i, i, PDFDoc.InsertFlag.e_none);
52							new_doc.Save(Utils.CreateExternalFile("newsletter_split_page_") + i + ".pdf", SDFDoc.SaveOptions.e_remove_unused);
53							Console.WriteLine("Done. Result saved in newsletter_split_page_" + i + ".pdf");
54						}
55					}
56				}
57			}
58			catch (Exception e)
59			{
60				Console.WriteLine("Exception caught:\n{0}", e);
61				Assert.True(false);
62			}
63
64			// Sample 2 - Merge several PDF documents into one
65			try
66			{
67				Console.WriteLine("_______________________________________________");
68				Console.WriteLine("Sample 2 - Merge several PDF documents into one...");
69
70				using (PDFDoc new_doc = new PDFDoc()) 
71				{
72					new_doc.InitSecurityHandler();
73					int page_num = 15;
74					for (int i = 1; i <= page_num; ++i) 
75					{
76						Console.WriteLine("Opening newsletter_split_page_" + i + ".pdf");
77						using (PDFDoc in_doc = new PDFDoc(Utils.CreateExternalFile("newsletter_split_page_") + i + ".pdf")) 
78						{
79							new_doc.InsertPages(i, in_doc, 1, in_doc.GetPageCount(), PDFDoc.InsertFlag.e_none);
80						}
81					}
82					new_doc.Save(Utils.CreateExternalFile("newsletter_merge_pages.pdf"), SDFDoc.SaveOptions.e_remove_unused);
83				}
84				Console.WriteLine("Done. Result saved in newsletter_merge_pages.pdf");
85			}
86			catch (Exception e)
87			{
88				Console.WriteLine("Exception caught:\n{0}", e);
89				Assert.True(false);
90			}
91
92
93			// Sample 3 - Delete every second page
94			try	
95			{
96				Console.WriteLine("_______________________________________________");
97				Console.WriteLine("Sample 3 - Delete every second page...");
98				Console.WriteLine("Opening the input pdf...");
99
100				using (PDFDoc in_doc = new PDFDoc(Utils.GetAssetTempFile(input_path + "newsletter.pdf")))
101				{
102					in_doc.InitSecurityHandler();
103
104					int page_num = in_doc.GetPageCount();
105					PageIterator itr;
106					while (page_num>=1)
107					{
108						itr = in_doc.GetPageIterator(page_num);
109						in_doc.PageRemove(itr);
110						page_num -= 2;
111					}		
112
113					in_doc.Save(Utils.CreateExternalFile("newsletter_page_remove.pdf"), 0);
114				}
115				Console.WriteLine("Done. Result saved in newsletter_page_remove.pdf...");
116			}
117			catch(Exception e)
118			{
119				Console.WriteLine("Exception caught:\n{0}", e);
120				Assert.True(false);
121			}
122
123			// Sample 4 - Inserts a page from one document at different
124			// locations within another document                       
125			try   
126			{	 
127				Console.WriteLine("_______________________________________________");
128				Console.WriteLine("Sample 4 - Insert a page at different locations...");
129				Console.WriteLine("Opening the input pdf...");
130
131				using (PDFDoc in1_doc = new PDFDoc(Utils.GetAssetTempFile(input_path + "newsletter.pdf")))
132				using (PDFDoc in2_doc = new PDFDoc(Utils.GetAssetTempFile(input_path + "fish.pdf")))
133				{
134					in1_doc.InitSecurityHandler();
135					in2_doc.InitSecurityHandler();
136
137					Page src_page = in2_doc.GetPage(1);
138					PageIterator dst_page = in1_doc.GetPageIterator(1);
139					int page_num = 1;
140					while (dst_page.HasNext()) {
141						if (page_num++ % 3 == 0) {
142							in1_doc.PageInsert(dst_page, src_page);
143						}
144						dst_page.Next();
145					}
146
147					in1_doc.Save(Utils.CreateExternalFile("newsletter_page_insert.pdf"), 0);
148					Console.WriteLine("Done. Result saved in newsletter_page_insert.pdf...");
149				}
150			}
151			catch(Exception e)
152			{
153				Console.WriteLine("Exception caught:\n{0}", e);
154				Assert.True(false);
155			}
156
157			// Sample 5 - Replicate pages within a single document
158			try	
159			{
160				Console.WriteLine("_______________________________________________");
161				Console.WriteLine("Sample 5 - Replicate pages within a single document...");
162				Console.WriteLine("Opening the input pdf...");
163				using (PDFDoc doc = new PDFDoc(Utils.GetAssetTempFile(input_path + "newsletter.pdf"))) 
164				{
165					doc.InitSecurityHandler();
166
167					// Replicate the cover page three times (copy page #1 and place it before the 
168					// seventh page in the document page sequence)
169					Page cover = doc.GetPage(1);
170                    PageIterator p7 = doc.GetPageIterator(7);
171                    doc.PageInsert(p7, cover);
172					doc.PageInsert(p7, cover);
173					doc.PageInsert(p7, cover);
174
175					// Replicate the cover page two more times by placing it before and after
176					// existing pages.
177					doc.PagePushFront(cover);
178					doc.PagePushBack(cover);
179
180					doc.Save(Utils.CreateExternalFile("newsletter_page_clone.pdf"), 0);
181					Console.WriteLine("Done. Result saved in newsletter_page_clone.pdf...");
182				}
183			}
184			catch(Exception e)
185			{
186				Console.WriteLine("Exception caught:\n{0}", e);
187				Assert.True(false);
188			}
189
190			// Sample 6 - Use ImportPages() in order to copy multiple pages at once    
191			// in order to preserve shared resources between pages (e.g. images, fonts,
192			// colorspaces, etc.)
193			try	
194			{    
195				Console.WriteLine("_______________________________________________");
196				Console.WriteLine("Sample 6 - Preserving shared resources using ImportPages...");
197				Console.WriteLine("Opening the input pdf...");
198				using (PDFDoc in_doc = new PDFDoc(Utils.GetAssetTempFile(input_path + "newsletter.pdf"))) 
199				{
200					in_doc.InitSecurityHandler();
201					using (PDFDoc new_doc = new PDFDoc()) 
202					{
203						ArrayList copy_pages = new ArrayList(); 
204						for (PageIterator itr = in_doc.GetPageIterator(); itr.HasNext(); itr.Next()) {
205							copy_pages.Add(itr.Current());
206						}
207
208						ArrayList imported_pages = new_doc.ImportPages(copy_pages);
209						for (int i=0; i!=imported_pages.Count; ++i) {
210							new_doc.PagePushFront((Page)imported_pages[i]); // Order pages in reverse order. 
211							// Use PagePushBack() if you would like to preserve the same order.
212						}
213					
214						new_doc.Save(Utils.CreateExternalFile("newsletter_import_pages.pdf"), 0);
215						Console.WriteLine("Done. Result saved in newsletter_import_pages.pdf...");
216						Console.WriteLine();
217						Console.WriteLine("Note that the output file size is less than half the size"); 
218						Console.WriteLine("of the file produced using individual page copy operations");
219						Console.WriteLine("between two documents");
220					}
221				}
222			}
223			catch(Exception e)
224			{
225				Console.WriteLine("Exception caught:\n{0}", e);
226				Assert.True(false);
227			}
228		}
229	}
230}