267 lines
9.6 KiB
C#
267 lines
9.6 KiB
C#
using System;
|
|
using System.util;
|
|
using System.Collections;
|
|
using System.Text;
|
|
using System.IO;
|
|
using iTextSharp.text.pdf;
|
|
/*
|
|
* $Id: Utilities.cs,v 1.9 2008/05/13 11:25:13 psoares33 Exp $
|
|
*
|
|
*
|
|
* 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;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Measurement conversion from millimeters to points.
|
|
* @param value a value in millimeters
|
|
* @return a value in points
|
|
* @since 2.1.2
|
|
*/
|
|
public static float MillimetersToPoints(float value) {
|
|
return InchesToPoints(MillimetersToInches(value));
|
|
}
|
|
|
|
/**
|
|
* Measurement conversion from millimeters to inches.
|
|
* @param value a value in millimeters
|
|
* @return a value in inches
|
|
* @since 2.1.2
|
|
*/
|
|
public static float MillimetersToInches(float value) {
|
|
return value / 25.4f;
|
|
}
|
|
|
|
/**
|
|
* Measurement conversion from points to millimeters.
|
|
* @param value a value in points
|
|
* @return a value in millimeters
|
|
* @since 2.1.2
|
|
*/
|
|
public static float PointsToMillimeters(float value) {
|
|
return InchesToMillimeters(PointsToInches(value));
|
|
}
|
|
|
|
/**
|
|
* Measurement conversion from points to inches.
|
|
* @param value a value in points
|
|
* @return a value in inches
|
|
* @since 2.1.2
|
|
*/
|
|
public static float PointsToInches(float value) {
|
|
return value / 72f;
|
|
}
|
|
|
|
/**
|
|
* Measurement conversion from inches to millimeters.
|
|
* @param value a value in inches
|
|
* @return a value in millimeters
|
|
* @since 2.1.2
|
|
*/
|
|
public static float InchesToMillimeters(float value) {
|
|
return value * 25.4f;
|
|
}
|
|
|
|
/**
|
|
* Measurement conversion from inches to points.
|
|
* @param value a value in inches
|
|
* @return a value in points
|
|
* @since 2.1.2
|
|
*/
|
|
public static float InchesToPoints(float value) {
|
|
return value * 72f;
|
|
}
|
|
|
|
public static bool IsSurrogateHigh(char c) {
|
|
return c >= '\ud800' && c <= '\udbff';
|
|
}
|
|
|
|
public static bool IsSurrogateLow(char c) {
|
|
return c >= '\udc00' && c <= '\udfff';
|
|
}
|
|
|
|
public static bool IsSurrogatePair(string text, int idx) {
|
|
if (idx < 0 || idx > text.Length - 2)
|
|
return false;
|
|
return IsSurrogateHigh(text[idx]) && IsSurrogateLow(text[idx + 1]);
|
|
}
|
|
|
|
public static bool IsSurrogatePair(char[] text, int idx) {
|
|
if (idx < 0 || idx > text.Length - 2)
|
|
return false;
|
|
return IsSurrogateHigh(text[idx]) && IsSurrogateLow(text[idx + 1]);
|
|
}
|
|
|
|
public static int ConvertToUtf32(char highSurrogate, char lowSurrogate) {
|
|
return (((highSurrogate - 0xd800) * 0x400) + (lowSurrogate - 0xdc00)) + 0x10000;
|
|
}
|
|
|
|
public static int ConvertToUtf32(char[] text, int idx) {
|
|
return (((text[idx] - 0xd800) * 0x400) + (text[idx + 1] - 0xdc00)) + 0x10000;
|
|
}
|
|
|
|
public static int ConvertToUtf32(string text, int idx) {
|
|
return (((text[idx] - 0xd800) * 0x400) + (text[idx + 1] - 0xdc00)) + 0x10000;
|
|
}
|
|
|
|
public static string ConvertFromUtf32(int codePoint) {
|
|
if (codePoint < 0x10000)
|
|
return Char.ToString((char)codePoint);
|
|
codePoint -= 0x10000;
|
|
return new string(new char[]{(char)((codePoint / 0x400) + 0xd800), (char)((codePoint % 0x400) + 0xdc00)});
|
|
}
|
|
}
|
|
} |