Example usage for java.text Bidi baseIsLeftToRight

Introduction

In this page you can find the example usage for java.text Bidi baseIsLeftToRight.

Prototype

public boolean baseIsLeftToRight() 

Source Link

Document

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

Usage

From source file:Main.java

/**
 * This method determines if the direction of a substring is right-to-left.
 * If the string is empty that determination is based on the default system language
 * Locale.getDefault()./*  w  ww  . j a va 2  s  .  c om*/
 * The method can handle invalid substring definitions (start > end etc.), in which case the
 * method returns False.
 *
 * @return True if the text direction is right-to-left, false otherwise.
 */
public static boolean isRTL(CharSequence s, int start, int end) {
    if (s == null || s.length() == 0) {
        // empty string --> determine the direction from the default language
        return isRTL(Locale.getDefault());
    }

    if (start == end) {
        // if no character is selected we need to expand the selection
        start = Math.max(0, --start);
        if (start == end) {
            end = Math.min(s.length(), ++end);
        }
    }

    try {
        Bidi bidi = new Bidi(s.subSequence(start, end).toString(), Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT);
        return !bidi.baseIsLeftToRight();
    } catch (IndexOutOfBoundsException e) {
        return false;
    }
}

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From source file:net.sf.jasperreports.engine.fill.SimpleTextLineWrapper.java

protected boolean isLeftToRight(char[] chars) {
    boolean leftToRight = true;
    if (Bidi.requiresBidi(chars, 0, chars.length)) {
        // determining the text direction
        // using default LTR as there's no way to have other default in the text
        Bidi bidi = new Bidi(chars, 0, null, 0, chars.length, Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT);
        leftToRight = bidi.baseIsLeftToRight();
    }//from   w w w. j  ava 2  s . com
    return leftToRight;
}

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