/**
* Returns {@code true} if the specified object is an instance of <code>NumericShaper</code> and
* shapes identically to this one, regardless of the range representations, the bit mask or the
* enum. For example, the following code produces {@code "true"}.
*
* <blockquote>
*
* <pre>
* NumericShaper ns1 = NumericShaper.getShaper(NumericShaper.ARABIC);
* NumericShaper ns2 = NumericShaper.getShaper(NumericShaper.Range.ARABIC);
* System.out.println(ns1.equals(ns2));
* </pre>
*
* </blockquote>
*
* @param o the specified object to compare to this <code>NumericShaper</code>
* @return <code>true</code> if <code>o</code> is an instance of <code>NumericShaper</code> and
* shapes in the same way; <code>false</code> otherwise.
* @see java.lang.Object#equals(java.lang.Object)
*/
public boolean equals(Object o) {
if (o != null) {
try {
NumericShaper rhs = (NumericShaper) o;
if (rangeSet != null) {
if (rhs.rangeSet != null) {
return isContextual() == rhs.isContextual()
&& rangeSet.equals(rhs.rangeSet)
&& shapingRange == rhs.shapingRange;
}
return isContextual() == rhs.isContextual()
&& rangeSet.equals(Range.maskToRangeSet(rhs.mask))
&& shapingRange == Range.indexToRange(rhs.key);
} else if (rhs.rangeSet != null) {
Set<Range> rset = Range.maskToRangeSet(mask);
Range srange = Range.indexToRange(key);
return isContextual() == rhs.isContextual()
&& rset.equals(rhs.rangeSet)
&& srange == rhs.shapingRange;
}
return rhs.mask == mask && rhs.key == key;
} catch (ClassCastException e) {
}
}
return false;
}
/**
* Returns a contextual shaper for the provided Unicode range(s). The Latin-1 (EUROPEAN) digits
* will be converted to the decimal digits corresponding to the range of the preceding text, if
* the range is one of the provided ranges. The shaper uses {@code defaultContext} as the starting
* context.
*
* @param ranges the specified Unicode ranges
* @param defaultContext the starting context, such as {@code NumericShaper.Range.EUROPEAN}
* @return a contextual shaper for the specified Unicode ranges.
* @throws NullPointerException if {@code ranges} or {@code defaultContext} is {@code null}
* @since 1.7
*/
public static NumericShaper getContextualShaper(Set<Range> ranges, Range defaultContext) {
if (defaultContext == null) {
throw new NullPointerException();
}
NumericShaper shaper = new NumericShaper(defaultContext, ranges);
shaper.mask = CONTEXTUAL_MASK;
return shaper;
}
/**
* Returns a contextual shaper for the provided Unicode range(s). The Latin-1 (EUROPEAN) digits
* are converted to the decimal digits corresponding to the range of the preceding text, if the
* range is one of the provided ranges.
*
* <p>The shaper assumes EUROPEAN as the starting context, that is, if EUROPEAN digits are
* encountered before any strong directional text in the string, the context is presumed to be
* EUROPEAN, and so the digits will not shape.
*
* @param ranges the specified Unicode ranges
* @return a contextual shaper for the specified ranges
* @throws NullPointerException if {@code ranges} is {@code null}.
* @since 1.7
*/
public static NumericShaper getContextualShaper(Set<Range> ranges) {
NumericShaper shaper = new NumericShaper(Range.EUROPEAN, ranges);
shaper.mask = CONTEXTUAL_MASK;
return shaper;
}
/** Initialize state, including fChars array, direction, and fBidi. */
private void initAll(AttributedCharacterIterator text) {
fStart = text.getBeginIndex();
// extract chars
fChars = new char[text.getEndIndex() - fStart];
int n = 0;
for (char c = text.first(); c != CharacterIterator.DONE; c = text.next()) {
fChars[n++] = c;
}
text.first();
fBidi = new Bidi(text);
if (fBidi.isLeftToRight()) {
fBidi = null;
}
text.first();
Map<? extends Attribute, ?> paragraphAttrs = text.getAttributes();
NumericShaper shaper = AttributeValues.getNumericShaping(paragraphAttrs);
if (shaper != null) {
shaper.shape(fChars, 0, fChars.length);
}
fParagraph = new StyledParagraph(text, fChars);
// set paragraph attributes
{
// If there's an embedded graphic at the start of the
// paragraph, look for the first non-graphic character
// and use it and its font to initialize the paragraph.
// If not, use the first graphic to initialize.
fJustifyRatio = AttributeValues.getJustification(paragraphAttrs);
boolean haveFont = TextLine.advanceToFirstFont(text);
if (haveFont) {
Font defaultFont = TextLine.getFontAtCurrentPos(text);
int charsStart = text.getIndex() - text.getBeginIndex();
LineMetrics lm = defaultFont.getLineMetrics(fChars, charsStart, charsStart + 1, fFrc);
fBaseline = (byte) lm.getBaselineIndex();
fBaselineOffsets = lm.getBaselineOffsets();
} else {
// hmmm what to do here? Just try to supply reasonable
// values I guess.
GraphicAttribute graphic =
(GraphicAttribute) paragraphAttrs.get(TextAttribute.CHAR_REPLACEMENT);
fBaseline = TextLayout.getBaselineFromGraphic(graphic);
Hashtable<Attribute, ?> fmap = new Hashtable<>(5, (float) 0.9);
Font dummyFont = new Font(fmap);
LineMetrics lm = dummyFont.getLineMetrics(" ", 0, 1, fFrc);
fBaselineOffsets = lm.getBaselineOffsets();
}
fBaselineOffsets = TextLine.getNormalizedOffsets(fBaselineOffsets, fBaseline);
}
invalidateComponents();
}