Java Code Examples for android.icu.lang.UCharacter#hasBinaryProperty()

/**
 * Returns true if the given code point is emoji modifier base.
 * @param c codepoint to check
 * @return true if is emoji modifier base
 */
public static boolean isEmojiModifierBase(int c) {
    // These two characters were removed from Emoji_Modifier_Base in Emoji 4.0, but we need to
    // keep them as emoji modifier bases since there are fonts and user-generated text out there
    // that treats these as potential emoji bases.
    if (c == 0x1F91D || c == 0x1F93C) {
        return true;
    }
    // Emoji Modifier Base characters new in Unicode emoji 11
    // From https://www.unicode.org/Public/emoji/11.0/emoji-data.txt
    // TODO: Remove once emoji-data.text 11 is in ICU or update to 11.
    if ((0x1F9B5 <= c && c <= 0x1F9B6) || (0x1F9B8 <= c && c <= 0x1F9B9)) {
        return true;
    }
    return UCharacter.hasBinaryProperty(c, UProperty.EMOJI_MODIFIER_BASE);
}
 

@NonNull
private static String stripBidiControls(@NonNull String sign) {
    // For the sake of simplicity, we operate on code units, since all bidi controls are
    // in the BMP. We also expect the string to be very short (almost always 1 character), so we
    // don't need to use StringBuilder.
    String result = "";
    for (int i = 0; i < sign.length(); i++) {
        final char c = sign.charAt(i);
        if (!UCharacter.hasBinaryProperty(c, UProperty.BIDI_CONTROL)) {
            if (result.isEmpty()) {
                result = String.valueOf(c);
            } else {
                // This should happen very rarely, only if we have a multi-character sign,
                // or a sign outside BMP.
                result += c;
            }
        }
    }
    return result;
}
 

public boolean is(String sourceString) {
    if (sourceString.length() == 0) return true;
    char ch = sourceString.charAt(sourceString.length() - 1); // don't worry about surrogates.
    if (UCharacter.hasBinaryProperty(ch, UProperty.LOGICAL_ORDER_EXCEPTION)) return false;


    // disallow anything with a wordbreak between
    /*
    if (UTF16.countCodePoint(sourceString) <= 1) return true;
    thaiBreak.setText(sourceString);
    for (int pos = thaiBreak.first(); pos != BreakIterator.DONE; pos = thaiBreak.next()) {
        if (pos > 0 && pos < sourceString.length()) {
            System.out.println("Skipping " + Utility.escape(sourceString));
            return false;
        }
    }
     */
    return true;
}
 

@Test
public void TestRoundTrip() {
    int options = Normalizer.IGNORE_HANGUL;
    boolean compat = false;

    ComposedCharIter iter = new ComposedCharIter(false, options);
    while (iter.hasNext()) {
        final char ch = iter.next();

        String chStr = String.valueOf(ch);
        String decomp = iter.decomposition();
        String comp = Normalizer.compose(decomp, compat);

        if (UCharacter.hasBinaryProperty(ch, UProperty.FULL_COMPOSITION_EXCLUSION)) {
            logln("Skipped excluded char " + hex(ch) + " (" + UCharacter.getName(ch) + ")" );
            continue;
        }

        // Avoid disparaged characters
        if (decomp.length() == 4) continue;

        if (!comp.equals(chStr)) {
            errln("ERROR: Round trip invalid: " + hex(chStr) + " --> " + hex(decomp)
                + " --> " + hex(comp));

            errln("  char decomp is '" + decomp + "'");
        }
    }
}
 

@Test
public void TestTitleRegression() throws java.io.IOException {
    boolean isIgnorable = UCharacter.hasBinaryProperty('\'', UProperty.CASE_IGNORABLE);
    assertTrue("Case Ignorable check of ASCII apostrophe", isIgnorable);
    assertEquals("Titlecase check",
            "The Quick Brown Fox Can't Jump Over The Lazy Dogs.",
            UCharacter.toTitleCase(ULocale.ENGLISH, "THE QUICK BROWN FOX CAN'T JUMP OVER THE LAZY DOGS.", null));
}
 

/**
 * Returns true if the given code point is emoji modifier.
 */
public static boolean isEmojiModifier(int codePoint) {
    return UCharacter.hasBinaryProperty(codePoint, UProperty.EMOJI_MODIFIER);
}
 

/**
 * Returns true if the character has Emoji property.
 */
public static boolean isEmoji(int codePoint) {
    return isNewEmoji(codePoint) || UCharacter.hasBinaryProperty(codePoint, UProperty.EMOJI);
}
 

private static boolean isVariationSelector(int codepoint) {
    return UCharacter.hasBinaryProperty(codepoint, UProperty.VARIATION_SELECTOR);
}