Package icyllis.modernui.text

Class Directions

java.lang.Object

icyllis.modernui.text.Directions

public class Directions
extends Object

Stores information about bidirectional (left-to-right or right-to-left) text within the layout of a line in rendering order.

Field Summary

Fields

Modifier and Type	Field	Description
static final Directions	ALL_LEFT_TO_RIGHT
static final Directions	ALL_RIGHT_TO_LEFT
int[]	mDirections	Directions represents directional runs within a line of text.

Constructor Summary

Constructors

Constructor	Description
Directions(int[] dirs)

Method Summary

Modifier and Type	Method	Description
int	getRunCount()	Returns number of BiDi runs.
int	getRunLength(int runIndex)	Returns the length of the BiDi run.
int	getRunStart(int runIndex)	Returns the start offset of the BiDi run.
boolean	isRunRtl(int runIndex)	Returns true if the BiDi run is RTL.

Methods inherited from class java.lang.Object

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

Field Details

ALL_LEFT_TO_RIGHT

public static final Directions ALL_LEFT_TO_RIGHT

ALL_RIGHT_TO_LEFT

public static final Directions ALL_RIGHT_TO_LEFT

mDirections

public int[] mDirections

Directions represents directional runs within a line of text. Runs are pairs of ints listed in visual order, starting from the leading margin. The first int of each pair is the offset from the first character of the line to the start of the run. The second int represents both the length and level of the run. The length is in the lower bits, accessed by masking with RUN_LENGTH_MASK. The level is in the higher bits, accessed by shifting by RUN_LEVEL_SHIFT and masking by RUN_LEVEL_MASK. To simply test for an RTL direction, test the bit using RUN_RTL_FLAG, if set then the direction is rtl.

Constructor Details

Directions

public Directions(int[] dirs)

See Also:

• MeasuredParagraph.getDirections(int, int)

Method Details

getRunCount

public int getRunCount()

Returns number of BiDi runs.

getRunStart

public int getRunStart(int runIndex)

Returns the start offset of the BiDi run.

Parameters:

runIndex - the index of the BiDi run

Returns:

the start offset of the BiDi run.

getRunLength

public int getRunLength(int runIndex)

Returns the length of the BiDi run.

Note that this method may return too large number due to reducing the number of object allocations. The too large number means the remaining part is assigned to this run. The caller must clamp the returned value.

Parameters:

runIndex - the index of the BiDi run

Returns:

the length of the BiDi run.

isRunRtl

public boolean isRunRtl(int runIndex)

Returns true if the BiDi run is RTL.

Parameters:

runIndex - the index of the BiDi run

Returns:

true if the BiDi run is RTL.