Added in API level 34

TextBoundsInfo

class TextBoundsInfo : Parcelable
kotlin.Any
   ↳ android.view.inputmethod.TextBoundsInfo

The text bounds information of a slice of text in the editor.

This class provides IME the layout information of the text within the range from getStartIndex() to getEndIndex(). It's intended to be used by IME as a supplementary API to support handwriting gestures.

Summary

Nested classes

The builder class to create a TextBoundsInfo object.
Constants
static Int

The flag indicating that the character is a linefeed character.
static Int

The flag indicating that the character is a punctuation.
static Int

The flag indicating that the character is a whitespace.
static Int

The flag indicating that the line this character belongs to has RTL line direction.
Inherited constants
Public methods
Int

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
Int

The BiDi level of the character at the given index.
Unit
getCharacterBounds(index: Int, bounds: RectF)

Set the bounds of the character at the given index to the given RectF, in the coordinates of the editor.
Int

Return the flags associated with the character at the given index.
Int

Returns the index of the last character whose bounds information is available in this TextBoundsInfo, exclusive.
SegmentFinder

Returns the SegmentFinder that locates the grapheme boundaries.
SegmentFinder

Returns the SegmentFinder that locates the line boundaries.
Unit
getMatrix(matrix: Matrix)

Set the given android.graphics.Matrix to be the transformation matrix that is to be applied other positional data in this class.
Int

Return the index of the closest character to the given position.
IntArray?
getRangeForRect(area: RectF, segmentFinder: SegmentFinder, inclusionStrategy: Layout.TextInclusionStrategy)

Finds the range of text which is inside the specified rectangle area.
Int

Returns the index of the first character whose bounds information is available in this TextBoundsInfo, inclusive.
SegmentFinder

Returns the SegmentFinder that locates the word boundaries.
Unit
writeToParcel(dest: Parcel, flags: Int)

Flatten this object in to a Parcel.
Properties
static Parcelable.Creator<TextBoundsInfo!>

The CREATOR to make this class Parcelable.

Constants

FLAG_CHARACTER_LINEFEED

Added in API level 34
static val FLAG_CHARACTER_LINEFEED: Int

The flag indicating that the character is a linefeed character.

Value: 2

FLAG_CHARACTER_PUNCTUATION

Added in API level 34
static val FLAG_CHARACTER_PUNCTUATION: Int

The flag indicating that the character is a punctuation.

Value: 4

FLAG_CHARACTER_WHITESPACE

Added in API level 34
static val FLAG_CHARACTER_WHITESPACE: Int

The flag indicating that the character is a whitespace.

Value: 1

FLAG_LINE_IS_RTL

Added in API level 34
static val FLAG_LINE_IS_RTL: Int

The flag indicating that the line this character belongs to has RTL line direction. It's required that all characters in the same line must have the same direction.

Value: 8

Public methods

describeContents

Added in API level 34
fun describeContents(): Int

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel,int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Return
Int a bitmask indicating the set of special object types marshaled by this Parcelable object instance.

getCharacterBidiLevel

Added in API level 34
fun getCharacterBidiLevel(index: Int): Int

The BiDi level of the character at the given index.
BiDi level is defined by the unicode bidirectional algorithm . One can determine whether a character's direction is right-to-left (RTL) or left-to-right (LTR) by checking the last bit of the BiDi level. If it's 1, the character is RTL, otherwise the character is LTR. The BiDi level of a character must be in the range of [0, 125].

Parameters
index Int: the index of the queried character.
Return
Int the BiDi level of the character, which is an integer in the range of [0, 125]. Value is between 0 and 125 inclusive
Exceptions
java.lang.IndexOutOfBoundsException if the given index is out of the range from the start to the end.

getCharacterBounds

Added in API level 34
fun getCharacterBounds(
    index: Int, 
    bounds: RectF
): Unit

Set the bounds of the character at the given index to the given RectF, in the coordinates of the editor.

Parameters
index Int: the index of the queried character.
bounds RectF: the RectF used to receive the result. This value cannot be null.
Return
Unit This value cannot be null.
Exceptions
java.lang.IndexOutOfBoundsException if the given index is out of the range from the start to the end.

getCharacterFlags

Added in API level 34
fun getCharacterFlags(index: Int): Int

Return the flags associated with the character at the given index. The flags contain the following information:

Parameters
index Int: the index of the queried character.
Return
Int the flags associated with the queried character. Value is either 0 or a combination of android.view.inputmethod.TextBoundsInfo#FLAG_CHARACTER_WHITESPACE, android.view.inputmethod.TextBoundsInfo#FLAG_CHARACTER_LINEFEED, android.view.inputmethod.TextBoundsInfo#FLAG_CHARACTER_PUNCTUATION, and android.view.inputmethod.TextBoundsInfo#FLAG_LINE_IS_RTL
Exceptions
java.lang.IndexOutOfBoundsException if the given index is out of the range from the start to the end.

getEndIndex

Added in API level 34
fun getEndIndex(): Int

Returns the index of the last character whose bounds information is available in this TextBoundsInfo, exclusive.

getGraphemeSegmentFinder

Added in API level 34
fun getGraphemeSegmentFinder(): SegmentFinder

Returns the SegmentFinder that locates the grapheme boundaries.

Return
SegmentFinder This value cannot be null.

getLineSegmentFinder

Added in API level 34
fun getLineSegmentFinder(): SegmentFinder

Returns the SegmentFinder that locates the line boundaries.

Return
SegmentFinder This value cannot be null.

getMatrix

Added in API level 34
fun getMatrix(matrix: Matrix): Unit

Set the given android.graphics.Matrix to be the transformation matrix that is to be applied other positional data in this class.

Parameters
matrix Matrix: This value cannot be null.
Return
Unit This value cannot be null.

getOffsetForPosition

Added in API level 34
fun getOffsetForPosition(
    x: Float, 
    y: Float
): Int

Return the index of the closest character to the given position. It's similar to the text layout API Layout.getOffsetForHorizontal(int, float). And it's mainly used to find the cursor index (the index of the character before which the cursor should be placed) for the given position. It's guaranteed that the returned index is a grapheme break. Check getGraphemeSegmentFinder() for more information.

It's assumed that the editor lays out text in horizontal lines from top to bottom and each line is laid out according to the display algorithm specified in unicode bidirectional algorithm.

This method won't check the text ranges whose line information is missing. For example, the TextBoundsInfo's range is from index 5 to 15. If the associated SegmentFinder only identifies one line range from 7 to 12. Then this method won't check the text in the ranges of [5, 7) and [12, 15).

Under the following conditions, this method will return -1 indicating that no valid character is found:

Parameters
x Float: the x coordinates of the interested location, in the editor's coordinates.
y Float: the y coordinates of the interested location, in the editor's coordinates.
Return
Int the index of the character whose position is closest to the given location. It will return -1 if it can't find a character.

getRangeForRect

Added in API level 34
fun getRangeForRect(
    area: RectF, 
    segmentFinder: SegmentFinder, 
    inclusionStrategy: Layout.TextInclusionStrategy
): IntArray?

Finds the range of text which is inside the specified rectangle area. This method is a counterpart of the Layout.getRangeForRect(RectF, SegmentFinder, Layout.TextInclusionStrategy).

It's assumed that the editor lays out text in horizontal lines from top to bottom and each line is laid out according to the display algorithm specified in unicode bidirectional algorithm.

This method won't check the text ranges whose line information is missing. For example, the TextBoundsInfo's range is from index 5 to 15. If the associated line SegmentFinder only identifies one line range from 7 to 12. Then this method won't check the text in the ranges of [5, 7) and [12, 15).

Parameters
area RectF: area for which the text range will be found This value cannot be null.
segmentFinder SegmentFinder: SegmentFinder for determining the ranges of text to be considered as a text segment This value cannot be null.
inclusionStrategy Layout.TextInclusionStrategy: strategy for determining whether a text segment is inside the specified area This value cannot be null.
Return
IntArray? the text range stored in a two element int array. The first element is the start (inclusive) of the text range, and the second element is the end (exclusive) character offsets of the text range, or null if there are no text segments inside the area.

getStartIndex

Added in API level 34
fun getStartIndex(): Int

Returns the index of the first character whose bounds information is available in this TextBoundsInfo, inclusive.

getWordSegmentFinder

Added in API level 34
fun getWordSegmentFinder(): SegmentFinder

Returns the SegmentFinder that locates the word boundaries.

Return
SegmentFinder This value cannot be null.

writeToParcel

Added in API level 34
fun writeToParcel(
    dest: Parcel, 
    flags: Int
): Unit

Flatten this object in to a Parcel.

Parameters
dest Parcel: The Parcel in which the object should be written. This value cannot be null.
flags Int: Additional flags about how the object should be written. May be 0 or PARCELABLE_WRITE_RETURN_VALUE.

Properties

CREATOR

Added in API level 34
static val CREATOR: Parcelable.Creator<TextBoundsInfo!>

The CREATOR to make this class Parcelable.