BidiHelper class

A utility class that provides methods for detecting and estimating text directionality.

This class contains methods to analyze text content and determine whether it should be displayed in right-to-left (RTL) or left-to-right (LTR) direction based on the characters it contains.

Constructors

BidiHelper.new()

Properties

hashCode → int: The hash code for this object.
no setterinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toString() → String: A string representation of this object.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited

Static Methods

detectRtlDirectionality(String str, {bool isHtml = false}) → bool: Check the estimated directionality of str, return true if the piece of text should be laid out in RTL direction. If isHtml is true, the string is HTML or HTML-escaped.
estimateDirectionOfText(String text, {bool isHtml = false}) → TextDirection?: Estimates the directionality of text using the best known general-purpose method (using relative word counts). A null return value indicates completely neutral input. isHtml is true if text HTML or HTML-escaped.
hasAnyLtr(String text, [bool isHtml = false]) → bool: Determines if the given text has any LTR characters in it. If isHtml is true, the text is HTML or HTML-escaped.
startsWithRtl(String text, [bool isHtml = false]) → bool: Determines if the first character in text with strong directionality is RTL. If isHtml is true, the text is HTML or HTML-escaped.
stripHtmlIfNeeded(String text) → String: Returns the input text with spaces instead of HTML tags or HTML escapes, which is helpful for text directionality estimation.