nu.validator.htmlparser.impl
Class NormalizationChecker

java.lang.Object
  nu.validator.htmlparser.impl.NormalizationChecker

All Implemented Interfaces:

CharacterHandler

public final class NormalizationChecker
extends Object
implements CharacterHandler

Version:

$Id: NormalizationChecker.java 155 2007-09-13 11:54:32Z hsivonen $

Author:

hsivonen

Field Summary

private boolean	alreadyComplainedAboutThisRun Indicates whether the current run has already caused an error.
private boolean	atStartOfRun Indicates whether the checker the next call to characters() is the first call in a run.
private char[]	buf A buffer for holding sequences overlap the SAX buffer boundary.
private char[]	bufHolder A holder for the original buffer (for the memory leak prevention mechanism).
private static com.ibm.icu.text.UnicodeSet	COMPOSING_CHARACTERS A thread-safe set of composing characters as per Charmod Norm.
private ErrorHandler	errorHandler
private Locator	locator
private int	pos The current used length of the buffer, i.e.

Constructor Summary

NormalizationChecker(Locator locator)
Constructor with mode selection.

Method Summary

private void	appendToBuf(char[] ch, int start, int end) Appends a slice of an UTF-16 code unit array to the internal buffer.
void	characters(char[] ch, int start, int length)
void	end()
void	err(String message) Emit an error.
private void	errAboutTextRun() Emits an error stating that the current text run or the source text is not in NFC.
private static boolean	isComposingChar(int c) Returns true if the argument is a composing character and false otherwise.
private static boolean	isComposingCharOrSurrogate(char c) Returns true if the argument is a composing BMP character or a surrogate and false otherwise.
void	setErrorHandler(ErrorHandler errorHandler)
void	start()

Methods inherited from class java.lang.Object

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

Field Detail

errorHandler

private ErrorHandler errorHandler

locator

private Locator locator

COMPOSING_CHARACTERS

private static final com.ibm.icu.text.UnicodeSet COMPOSING_CHARACTERS

A thread-safe set of composing characters as per Charmod Norm.

buf

private char[] buf

A buffer for holding sequences overlap the SAX buffer boundary.

bufHolder

private char[] bufHolder

A holder for the original buffer (for the memory leak prevention mechanism).

pos

private int pos

The current used length of the buffer, i.e. the index of the first slot that does not hold current data.

atStartOfRun

private boolean atStartOfRun

Indicates whether the checker the next call to characters() is the first call in a run.

alreadyComplainedAboutThisRun

private boolean alreadyComplainedAboutThisRun

Indicates whether the current run has already caused an error.

Constructor Detail

NormalizationChecker

public NormalizationChecker(Locator locator)

Constructor with mode selection.

Parameters:

sourceTextMode - whether the source text-related messages should be enabled.

Method Detail

err

public void err(String message)
         throws SAXException

Emit an error. The locator is used.

Parameters:

message - the error message

Throws:

SAXException - if something goes wrong

isComposingCharOrSurrogate

private static boolean isComposingCharOrSurrogate(char c)

Returns true if the argument is a composing BMP character or a surrogate and false otherwise.

Parameters:

c - a UTF-16 code unit

Returns:

true if the argument is a composing BMP character or a surrogate and false otherwise

isComposingChar

private static boolean isComposingChar(int c)

Returns true if the argument is a composing character and false otherwise.

Parameters:

c - a Unicode code point

Returns:

true if the argument is a composing character false otherwise

start

public void start()

Specified by:

start in interface CharacterHandler

See Also:

CharacterHandler.start()

characters

public void characters(char[] ch,
                       int start,
                       int length)
                throws SAXException

Specified by:

characters in interface CharacterHandler

Throws:

SAXException

See Also:

CharacterHandler.characters(char[], int, int)

errAboutTextRun

private void errAboutTextRun()
                      throws SAXException

Emits an error stating that the current text run or the source text is not in NFC.

Throws:

SAXException - if the ErrorHandler throws

appendToBuf

private void appendToBuf(char[] ch,
                         int start,
                         int end)

Appends a slice of an UTF-16 code unit array to the internal buffer.

Parameters:

ch - the array from which to copy

start - the index of the first element that is copied

end - the index of the first element that is not copied

end

public void end()
         throws SAXException

Specified by:

end in interface CharacterHandler

Throws:

SAXException

See Also:

CharacterHandler.end()

setErrorHandler

public void setErrorHandler(ErrorHandler errorHandler)