org.apache.fop.util
Class CharUtilities

java.lang.Object
  org.apache.fop.util.CharUtilities

public class CharUtilities

extends java.lang.Object

This class provides utilities to distinguish various kinds of Unicode whitespace and to get character widths in a given FontState.

Field Summary

static char	CODE_EOT Character code used to signal a character boundary in inline content, such as an inline with borders and padding or a nested block object.
static int	EOT Character class: Boundary between text runs
static int	LINEFEED Character class: Line feed
static char	NBSPACE non-breaking space
static int	NONWHITESPACE Character class: non-whitespace
static char	SOFT_HYPHEN soft hyphen
static char	SPACE normal space
static int	UCWHITESPACE Character class: Unicode white space
static int	XMLWHITESPACE Character class: XML whitespace
static char	ZERO_WIDTH_NOBREAK_SPACE zero-width no-break space (= byte order mark)
static char	ZERO_WIDTH_SPACE zero-width space

Constructor Summary

protected

CharUtilities() Utility class: Constructor prevents instantiating when subclassed.

Method Summary

static int	classOf(char c) Return the appropriate CharClass constant for the type of the passed character.
static boolean	isAdjustableSpace(char c) Method to determine if the character is an adjustable space.
static boolean	isAlphabetic(char ch) Indicates whether a character is classified as "Alphabetic" by the Unicode standard.
static boolean	isAnySpace(char c) Determines if the character represents any kind of space.
static boolean	isBreakableSpace(char c) Helper method to determine if the character is a space with normal behavior.
static boolean	isFixedWidthSpace(char c) Method to determine if the character is a (breakable) fixed-width space.
static boolean	isNonBreakableSpace(char c) Method to determine if the character is a nonbreaking space.

Methods inherited from class java.lang.Object

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

Field Detail

CODE_EOT

public static final char CODE_EOT

Character code used to signal a character boundary in inline content, such as an inline with borders and padding or a nested block object.

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Constant Field Values

UCWHITESPACE

public static final int UCWHITESPACE

Character class: Unicode white space

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Constant Field Values

LINEFEED

public static final int LINEFEED

Character class: Line feed

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Constant Field Values

EOT

public static final int EOT

Character class: Boundary between text runs

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Constant Field Values

NONWHITESPACE

public static final int NONWHITESPACE

Character class: non-whitespace

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Constant Field Values

XMLWHITESPACE

public static final int XMLWHITESPACE

Character class: XML whitespace

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Constant Field Values

SPACE

public static final char SPACE

normal space

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Constant Field Values

NBSPACE

public static final char NBSPACE

non-breaking space

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Constant Field Values

ZERO_WIDTH_SPACE

public static final char ZERO_WIDTH_SPACE

zero-width space

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Constant Field Values

ZERO_WIDTH_NOBREAK_SPACE

public static final char ZERO_WIDTH_NOBREAK_SPACE

zero-width no-break space (= byte order mark)

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Constant Field Values

SOFT_HYPHEN

public static final char SOFT_HYPHEN

soft hyphen

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Constant Field Values

Constructor Detail

CharUtilities

protected CharUtilities()

Utility class: Constructor prevents instantiating when subclassed.

Method Detail

classOf

public static int classOf(char c)

Return the appropriate CharClass constant for the type of the passed character.

Parameters:

c - character to inspect

Returns:

the determined character class

isBreakableSpace

public static boolean isBreakableSpace(char c)

Helper method to determine if the character is a space with normal behavior. Normal behavior means that it's not non-breaking.

Parameters:

c - character to inspect

Returns:

True if the character is a normal space

isFixedWidthSpace

public static boolean isFixedWidthSpace(char c)

Method to determine if the character is a (breakable) fixed-width space.

Parameters:

c - the character to check

Returns:

true if the character has a fixed-width

isNonBreakableSpace

public static boolean isNonBreakableSpace(char c)

Method to determine if the character is a nonbreaking space.

Parameters:

c - character to check

Returns:

True if the character is a nbsp

isAdjustableSpace

public static boolean isAdjustableSpace(char c)

Method to determine if the character is an adjustable space.

Parameters:

c - character to check

Returns:

True if the character is adjustable

isAnySpace

public static boolean isAnySpace(char c)

Determines if the character represents any kind of space.

Parameters:

c - character to check

Returns:

True if the character represents any kind of space

isAlphabetic

public static boolean isAlphabetic(char ch)

Indicates whether a character is classified as "Alphabetic" by the Unicode standard.

Parameters:

ch - the character

Returns:

true if the character is "Alphabetic"