org.w3c.tidy
Class TidyUtils

java.lang.Object
  org.w3c.tidy.TidyUtils

public final class TidyUtils
extends java.lang.Object

Utility class with handy methods, mainly for String handling or for reproducing c behaviours.

Version:

$Revision $ ($Author $)

Author:

Fabrizio Giustina

Method Summary

static boolean	findBadSubString(java.lang.String s, java.lang.String p, int len) Return true if substring s is in p and isn't all in upper case.
static char	foldCase(char c, boolean tocaps, boolean xmlTags) Fold case of a char.
static byte[]	getBytes(java.lang.String str) Should always be able convert to/from UTF-8, so encoding exceptions are converted to an Error to avoid adding throws declarations in lots of methods.
static java.lang.String	getString(byte[] bytes, int offset, int length) Should always be able convert to/from UTF-8, so encoding exceptions are converted to an Error to avoid adding throws declarations in lots of methods.
static boolean	isCharEncodingSupported(java.lang.String name) Is the given character encoding supported?
static boolean	isDigit(char c) Is the given char a digit?
static boolean	isLetter(char c) Is the given char a letter?
static boolean	isLower(char c) Determines if the specified character is a lowercase character.
static boolean	isNamechar(char c) Is the given char valid in name?
static boolean	isUpper(char c) Determines if the specified character is a uppercase character.
static boolean	isWhite(char c) Determines if the specified character is whitespace.
static int	lastChar(java.lang.String str) Return the last char in string.
static char	toLower(char c) Maps the given character to its lowercase equivalent.
static char	toUpper(char c) Maps the given character to its uppercase equivalent.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

findBadSubString

public static boolean findBadSubString(java.lang.String s,
                                       java.lang.String p,
                                       int len)

Return true if substring s is in p and isn't all in upper case. This is used to check the case of SYSTEM, PUBLIC, DTD and EN.

Parameters:

s - substring

p - full string

len - how many chars to check in p

Returns:

true if substring s is in p and isn't all in upper case

getBytes

public static byte[] getBytes(java.lang.String str)

Should always be able convert to/from UTF-8, so encoding exceptions are converted to an Error to avoid adding throws declarations in lots of methods.

Parameters:

str - String

Returns:

utf8 bytes

See Also:

String.getBytes()

getString

public static java.lang.String getString(byte[] bytes,
                                         int offset,
                                         int length)

Should always be able convert to/from UTF-8, so encoding exceptions are converted to an Error to avoid adding throws declarations in lots of methods.

Parameters:

bytes - byte array

offset - starting offset in byte array

length - length in byte array starting from offset

Returns:

same as new String(bytes, offset, length, "UTF8")

lastChar

public static int lastChar(java.lang.String str)

Return the last char in string. This is useful when trailing quotemark is missing on an attribute

Parameters:

str - String

Returns:

last char in String

isWhite

public static boolean isWhite(char c)

Determines if the specified character is whitespace.

Parameters:

c - char

Returns:

true if char is whitespace.

isDigit

public static boolean isDigit(char c)

Is the given char a digit?

Parameters:

c - char

Returns:

true if the given char is a digit

isLetter

public static boolean isLetter(char c)

Is the given char a letter?

Parameters:

c - char

Returns:

true if the given char is a letter

isNamechar

public static boolean isNamechar(char c)

Is the given char valid in name? (letter, digit or "-", ".", ":", "_")

Parameters:

c - char

Returns:

true if char is a name char.

isLower

public static boolean isLower(char c)

Determines if the specified character is a lowercase character.

Parameters:

c - char

Returns:

true if char is lower case.

isUpper

public static boolean isUpper(char c)

Determines if the specified character is a uppercase character.

Parameters:

c - char

Returns:

true if char is upper case.

toLower

public static char toLower(char c)

Maps the given character to its lowercase equivalent.

Parameters:

c - char

Returns:

lowercase char.

toUpper

public static char toUpper(char c)

Maps the given character to its uppercase equivalent.

Parameters:

c - char

Returns:

uppercase char.

foldCase

public static char foldCase(char c,
                            boolean tocaps,
                            boolean xmlTags)

Fold case of a char.

Parameters:

c - char

tocaps - convert to caps

xmlTags - use xml tags? If true no change will be performed

Returns:

folded char

isCharEncodingSupported

public static boolean isCharEncodingSupported(java.lang.String name)

Is the given character encoding supported?

Parameters:

name - character encoding name

Returns:

true if encoding is supported, false otherwhise.