Package org.freedesktop.harfbuzz

Enum Class BufferClusterLevel

java.lang.Object

java.lang.Enum<BufferClusterLevel>

org.freedesktop.harfbuzz.BufferClusterLevel

All Implemented Interfaces:

Serializable, Comparable<BufferClusterLevel>, Constable, Enumeration

@Generated("io.github.jwharm.JavaGI")
public enum BufferClusterLevel
extends Enum<BufferClusterLevel>
implements Enumeration

Data type for holding HarfBuzz's clustering behavior options. The cluster level dictates one aspect of how HarfBuzz will treat non-base characters during shaping.

In HBBUFFERCLUSTERLEVELMONOTONEGRAPHEMES, non-base characters are merged into the cluster of the base character that precedes them. There is also cluster merging every time the clusters will otherwise become non-monotone.

In HBBUFFERCLUSTERLEVELMONOTONECHARACTERS, non-base characters are initially assigned their own cluster values, which are not merged into preceding base clusters. This allows HarfBuzz to perform additional operations like reorder sequences of adjacent marks. The output is still monotone, but the cluster values are more granular.

In HBBUFFERCLUSTERLEVELCHARACTERS, non-base characters are assigned their own cluster values, which are not merged into preceding base clusters. Moreover, the cluster values are not merged into monotone order. This is the most granular cluster level, and it is useful for clients that need to know the exact cluster values of each character, but is harder to use for clients, since clusters might appear in any order.

In HBBUFFERCLUSTERLEVELGRAPHEMES, non-base characters are merged into the cluster of the base character that precedes them. This is similar to the Unicode Grapheme Cluster algorithm, but it is not exactly the same. The output is not forced to be monotone. This is useful for clients that want to use HarfBuzz as a cheap implementation of the Unicode Grapheme Cluster algorithm.

HBBUFFERCLUSTERLEVELMONOTONEGRAPHEMES is the default, because it maintains backward compatibility with older versions of HarfBuzz. New client programs that do not need to maintain such backward compatibility are recommended to use HBBUFFERCLUSTERLEVELMONOTONECHARACTERS instead of the default.

Since:

0.9.42

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
CHARACTERS	Don't group cluster values.
GRAPHEMES	Only group clusters, but don't enforce monotone order.
MONOTONE_CHARACTERS	Return cluster values grouped into monotone order.
MONOTONE_GRAPHEMES	Return cluster values grouped by graphemes into monotone order.

Field Summary

Fields

Modifier and Type	Field	Description
static final BufferClusterLevel	DEFAULT	Default cluster level, equal to HBBUFFERCLUSTERLEVELMONOTONEGRAPHEMES.

Method Summary

Modifier and Type	Method	Description
static @Nullable Type	getType()	Get the GType of the BufferClusterLevel class
int	getValue()	Get the numeric value of this enum
static BufferClusterLevel	of(int value)	Create a new BufferClusterLevel for the provided value
static BufferClusterLevel	of(MemorySegment address)	Create a new BufferClusterLevel for the value in the provided memory address.
static BufferClusterLevel	valueOf(String name)	Returns the enum constant of this class with the specified name.
static BufferClusterLevel[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

MONOTONE_GRAPHEMES

public static final BufferClusterLevel MONOTONE_GRAPHEMES

Return cluster values grouped by graphemes into monotone order.

MONOTONE_CHARACTERS

public static final BufferClusterLevel MONOTONE_CHARACTERS

Return cluster values grouped into monotone order.

CHARACTERS

public static final BufferClusterLevel CHARACTERS

Don't group cluster values.

GRAPHEMES

public static final BufferClusterLevel GRAPHEMES

Only group clusters, but don't enforce monotone order.

Field Details

DEFAULT

public static final BufferClusterLevel DEFAULT

Default cluster level, equal to HBBUFFERCLUSTERLEVELMONOTONEGRAPHEMES.

Method Details

values

public static BufferClusterLevel[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static BufferClusterLevel valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

of

public static BufferClusterLevel of(int value)

Create a new BufferClusterLevel for the provided value

Parameters:

value - the enum value

Returns:

the enum for the provided value

getValue

public int getValue()

Get the numeric value of this enum

Specified by:

getValue in interface Enumeration

Returns:

the enum value

of

public static BufferClusterLevel of(MemorySegment address)

Create a new BufferClusterLevel for the value in the provided memory address.

Parameters:

address - the memory address holding a enum value

Returns:

the enum for the value in the provided memory address

getType

public static @Nullable Type getType()

Get the GType of the BufferClusterLevel class

Returns:

the GType