using System;
using System.util;
using System.Collections;
using System.Text;
using System.IO;
using iTextSharp.text.pdf;
/*
* $Id: Utilities.cs,v 1.5 2007/06/28 23:03:33 psoares33 Exp $
* $Name: $
*
* Copyright 1999, 2000, 2001, 2002 by Bruno Lowagie.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
namespace iTextSharp.text {
/**
* A collection of convenience methods that were present in many different iText
* classes.
*/
public class Utilities {
/// <summary>
///
/// </summary>
/// <param name="table"></param>
/// <returns></returns>
public static ICollection GetKeySet(Properties table) {
return (table == null) ? new Properties().Keys : table.Keys;
}
/**
* Utility method to extend an array.
* @param original the original array or <CODE>null</CODE>
* @param item the item to be added to the array
* @return a new array with the item appended
*/
public static Object[][] AddToArray(Object[][] original, Object[] item) {
if (original == null) {
original = new Object[1][];
original[0] = item;
return original;
}
else {
Object[][] original2 = new Object[original.Length + 1][];
Array.Copy(original, 0, original2, 0, original.Length);
original2[original.Length] = item;
return original2;
}
}
/**
* Checks for a true/false value of a key in a Properties object.
* @param attributes
* @param key
* @return
*/
public static bool CheckTrueOrFalse(Properties attributes, String key) {
return Util.EqualsIgnoreCase("true", attributes[key]);
}
/// <summary>
/// This method makes a valid URL from a given filename.
/// </summary>
/// <remarks>
///
/// </remarks>
/// <param name="filename">a given filename</param>
/// <returns>a valid URL</returns>
public static Uri ToURL(string filename) {
try {
return new Uri(filename);
}
catch {
return new Uri("file:///" + filename);
}
}
/**
* Unescapes an URL. All the "%xx" are replaced by the 'xx' hex char value.
* @param src the url to unescape
* @return the eunescaped value
*/
public static String UnEscapeURL(String src) {
StringBuilder bf = new StringBuilder();
char[] s = src.ToCharArray();
for (int k = 0; k < s.Length; ++k) {
char c = s[k];
if (c == '%') {
if (k + 2 >= s.Length) {
bf.Append(c);
continue;
}
int a0 = PRTokeniser.GetHex((int)s[k + 1]);
int a1 = PRTokeniser.GetHex((int)s[k + 2]);
if (a0 < 0 || a1 < 0) {
bf.Append(c);
continue;
}
bf.Append((char)(a0 * 16 + a1));
k += 2;
}
else
bf.Append(c);
}
return bf.ToString();
}
private static byte[] skipBuffer = new byte[4096];
/// <summary>
/// This method is an alternative for the Stream.Skip()-method
/// that doesn't seem to work properly for big values of size.
/// </summary>
/// <param name="istr">the stream</param>
/// <param name="size">the number of bytes to skip</param>
public static void Skip(Stream istr, int size) {
while (size > 0) {
int r = istr.Read(skipBuffer, 0, Math.Min(skipBuffer.Length, size));
if (r <= 0)
return;
size -= r;
}
}
}
}