Bidi JDK 1.6)

Description

publicfinal class Bidi

This class implements the Unicode Bidirectional Algorithm.

See also:

Constructors

public Bidi (AttributedCharacterIterator paragraph)

Create Bidi from the given paragraph of text.

public Bidi (char[] text, int textStart, byte[] embeddings, int embStart, int paragraphLength, int flags)

Create Bidi from the given text, embedding, and direction information.

private Bidi (int dir, int baseLevel, int length, int[] data, int[] cws)

Private constructor used by line bidi.

public Bidi (String paragraph, int flags)

Create Bidi from the given paragraph of text and base direction.

Methods

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public boolean baseIsLeftToRight ()

Return true if the base direction is left-to-right.

public Bidi createLineBidi (int lineStart, int lineLimit)

Create a Bidi object representing the bidi information on a line of text within the paragraph represented by the current Bidi.

public int getBaseLevel ()

Return the base level (0 if left-to-right, 1 if right-to-left).

public int getLength ()

Return the length of text in the line.

public int getLevelAt (int offset)

Return the resolved level of the character at offset.

public int getRunCount ()

Return the number of level runs.

public int getRunLevel (int run)

Return the level of the nth logical run in this line.

Return the level of the nth logical run in this line.
Returns: the level of the run
Parameters:
- run - the index of the run, between 0 and getRunCount()

public int getRunLimit (int run)

Return the index of the character past the end of the nth logical run in this line, as an offset from the start of the line.

Return the index of the character past the end of the nth logical run in this line, as
an offset from the start of the line. For example, this will return the length
of the line for the last run on the line.
Returns: limit the limit of the run
Parameters:
- run - the index of the run, between 0 and getRunCount()

public int getRunStart (int run)

Return the index of the character at the start of the nth logical run in this line, as an offset from the start of the line.

Return the index of the character at the start of the nth logical run in this line, as
an offset from the start of the line.
Returns: the start of the run
Parameters:
- run - the index of the run, between 0 and getRunCount()

public boolean isLeftToRight ()

Return true if the line is all left-to-right text and the base direction is left-to-right.

public boolean isMixed ()

Return true if the line is not left-to-right or right-to-left.

public boolean isRightToLeft ()

Return true if the line is all right-to-left text, and the base direction is right-to-left.

publicstatic void reorderVisually (byte[] levels, int levelStart, Object objects, int objectStart, int count)

Reorder the objects in the array into visual order based on their levels.

Reorder the objects in the array into visual order based on their levels.
This is a utility function to use when you have a collection of objects
representing runs of text in logical order, each run containing text
at a single level. The elements at index from
objectStart up to objectStart + count
in the objects array will be reordered into visual order assuming
each run of text has the level indicated by the corresponding element
in the levels array (at index - objectStart + levelStart).
Parameters:
- levels - an array representing the bidi level of each object
- levelStart - the start position in the levels array
- objects - the array of objects to be reordered into visual order
- objectStart - the start position in the objects array
- count - the number of objects to reorder

publicstatic boolean requiresBidi (char[] text, int start, int limit)

Return true if the specified text requires bidi analysis.

public String toString ()

Display the bidi internal state, used in debugging.

Fields

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pack-private byte baselevel

pack-private int cws

pack-private byte dir

publicfinalstatic int DIRECTION_DEFAULT_LEFT_TO_RIGHT = "-2"

Constant indicating that the base direction depends on the first strong directional character in the text according to the Unicode Bidirectional Algorithm.

publicfinalstatic int DIRECTION_DEFAULT_RIGHT_TO_LEFT = "-1"

Constant indicating that the base direction depends on the first strong directional character in the text according to the Unicode Bidirectional Algorithm.

publicfinalstatic int DIRECTION_LEFT_TO_RIGHT = "0"

Constant indicating base direction is left-to-right.

publicfinalstatic int DIRECTION_RIGHT_TO_LEFT = "1"

Constant indicating base direction is right-to-left.

pack-private int length

pack-private int runs