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✏️ Editing: Permission.cs

/*
 * << Haru Free PDF Library 2.0.5 >> -- Permission.cs
 *
 * Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.
 * It is provided "as is" without express or implied warranty.
 *
 */

using System;
using System.IO;
using HPdf;

public class Permission {

public static void Main() {
        string owner_passwd = "owner";
        string user_passwd = "";
        string text = "User cannot print and copy this document.";
        Console.WriteLine("libhpdf-" + HPdfDoc.HPdfGetVersion());

try {
            HPdfDoc pdf = new HPdfDoc();

/* create default-font */
            HPdfFont font = pdf.GetFont("Helvetica", null);

/* add a new page object. */
            HPdfPage page = pdf.AddPage();

page.SetSize(HPdfPageSizes.HPDF_PAGE_SIZE_B5, 
                    HPdfPageDirection.HPDF_PAGE_LANDSCAPE);

page.BeginText();
            page.SetFontAndSize(font, 20);
            float tw = page.TextWidth(text);
            page.MoveTextPos((page.GetWidth() - tw) / 2,
                (page.GetHeight()  - 20) / 2);
            page.ShowText(text);
            page.EndText();

pdf.SetPassword(owner_passwd, user_passwd);
            pdf.SetPermission(HPdfDoc.HPDF_ENABLE_READ);

/* use 128 bit revision 3 encryption */
            pdf.SetEncryptionMode(HPdfEncryptMode.HPDF_ENCRYPT_R3, 16);

/* save the document to a file */
            pdf.SaveToFile("Permission.pdf");

} catch (Exception e) {
            Console.Error.WriteLine(e.Message);
        }
    }
}

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