下面列出了java.text.AttributedCharacterIterator#getAttribute ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
private List<StyleAttributeInterval> getVisibilityIntervals(int from, int to) {
StyleAttribute visibilityAttr = StyleAttribute.VISIBILITY;
List<StyleAttributeInterval> visibilities = new java.util.ArrayList<StyleAttributeInterval>();
int[] intervals = getAttributeIntervals(from, to, visibilityAttr);
AttributedCharacterIterator aci = iterator;
int savedIndex = aci.getIndex();
for (int i = 0, n = intervals.length / 2; i < n; ++i) {
int s = start + intervals[i*2 + 0];
int e = start + intervals[i*2 + 1];
aci.setIndex(s);
Object v = aci.getAttribute(visibilityAttr);
if (v != null)
visibilities.add(new StyleAttributeInterval(visibilityAttr, v, s, e));
}
aci.setIndex(savedIndex);
if (visibilities.isEmpty() && (visibility != null) && !visibility.equals(defaults.getVisibility()))
visibilities.add(new StyleAttributeInterval(visibilityAttr, visibility, start + from, start + to));
return visibilities;
}
static Font getFontAtCurrentPos(AttributedCharacterIterator aci) {
Object value = aci.getAttribute(TextAttribute.FONT);
if (value != null) {
return (Font) value;
}
if (aci.getAttribute(TextAttribute.FAMILY) != null) {
return Font.getFont(aci.getAttributes());
}
int ch = CodePointIterator.create(aci).next();
if (ch != CodePointIterator.DONE) {
FontResolver resolver = FontResolver.getInstance();
return resolver.getFont(resolver.getFontIndex(ch), aci.getAttributes());
}
return null;
}
static Font getFontAtCurrentPos(AttributedCharacterIterator aci) {
Object value = aci.getAttribute(TextAttribute.FONT);
if (value != null) {
return (Font) value;
}
if (aci.getAttribute(TextAttribute.FAMILY) != null) {
return Font.getFont(aci.getAttributes());
}
int ch = CodePointIterator.create(aci).next();
if (ch != CodePointIterator.DONE) {
FontResolver resolver = FontResolver.getInstance();
return resolver.getFont(resolver.getFontIndex(ch), aci.getAttributes());
}
return null;
}
static Font getFontAtCurrentPos(AttributedCharacterIterator aci) {
Object value = aci.getAttribute(TextAttribute.FONT);
if (value != null) {
return (Font) value;
}
if (aci.getAttribute(TextAttribute.FAMILY) != null) {
return Font.getFont(aci.getAttributes());
}
int ch = CodePointIterator.create(aci).next();
if (ch != CodePointIterator.DONE) {
FontResolver resolver = FontResolver.getInstance();
return resolver.getFont(resolver.getFontIndex(ch), aci.getAttributes());
}
return null;
}
static Font getFontAtCurrentPos(AttributedCharacterIterator aci) {
Object value = aci.getAttribute(TextAttribute.FONT);
if (value != null) {
return (Font) value;
}
if (aci.getAttribute(TextAttribute.FAMILY) != null) {
return Font.getFont(aci.getAttributes());
}
int ch = CodePointIterator.create(aci).next();
if (ch != CodePointIterator.DONE) {
FontResolver resolver = FontResolver.getInstance();
return resolver.getFont(resolver.getFontIndex(ch), aci.getAttributes());
}
return null;
}
static Font getFontAtCurrentPos(AttributedCharacterIterator aci) {
Object value = aci.getAttribute(TextAttribute.FONT);
if (value != null) {
return (Font) value;
}
if (aci.getAttribute(TextAttribute.FAMILY) != null) {
return Font.getFont(aci.getAttributes());
}
int ch = CodePointIterator.create(aci).next();
if (ch != CodePointIterator.DONE) {
FontResolver resolver = FontResolver.getInstance();
return resolver.getFont(resolver.getFontIndex(ch), aci.getAttributes());
}
return null;
}
static Font getFontAtCurrentPos(AttributedCharacterIterator aci) {
Object value = aci.getAttribute(TextAttribute.FONT);
if (value != null) {
return (Font) value;
}
if (aci.getAttribute(TextAttribute.FAMILY) != null) {
return Font.getFont(aci.getAttributes());
}
int ch = CodePointIterator.create(aci).next();
if (ch != CodePointIterator.DONE) {
FontResolver resolver = FontResolver.getInstance();
return resolver.getFont(resolver.getFontIndex(ch), aci.getAttributes());
}
return null;
}
@Override
public float findMaxFontSize(AttributedCharacterIterator line, float defaultFontSize)
{
line.setIndex(0);
Float maxFontSize = ZERO;
int runLimit = 0;
while(runLimit < line.getEndIndex() && (runLimit = line.getRunLimit(TextAttribute.SIZE)) <= line.getEndIndex())
{
Float size = (Float)line.getAttribute(TextAttribute.SIZE);
if (maxFontSize.compareTo(size) < 0)
{
maxFontSize = size;
}
line.setIndex(runLimit);
}
return maxFontSize;
}
static Font getFontAtCurrentPos(AttributedCharacterIterator aci) {
Object value = aci.getAttribute(TextAttribute.FONT);
if (value != null) {
return (Font) value;
}
if (aci.getAttribute(TextAttribute.FAMILY) != null) {
return Font.getFont(aci.getAttributes());
}
int ch = CodePointIterator.create(aci).next();
if (ch != CodePointIterator.DONE) {
FontResolver resolver = FontResolver.getInstance();
return resolver.getFont(resolver.getFontIndex(ch), aci.getAttributes());
}
return null;
}
/**
* finds attributes with regards to char index in this
* AttributedCharacterIterator, and puts them in a vector
*
* @param iterator
* @return a vector, each entry in this vector are of type FieldContainer,
* which stores start and end indexes and an attribute this range has
*/
protected static Vector<FieldContainer> findFields(AttributedCharacterIterator iterator) {
Vector<FieldContainer> result = new Vector<FieldContainer>();
while (iterator.getIndex() != iterator.getEndIndex()) {
int start = iterator.getRunStart();
int end = iterator.getRunLimit();
Iterator<Attribute> it = iterator.getAttributes().keySet().iterator();
while (it.hasNext()) {
AttributedCharacterIterator.Attribute attribute = it.next();
Object value = iterator.getAttribute(attribute);
result.add(new FieldContainer(start, end, attribute, value));
// System.out.println(start + " " + end + ": " + attribute + ",
// " + value );
// System.out.println("v.add(new FieldContainer(" + start +"," +
// end +"," + attribute+ "," + value+ "));");
}
iterator.setIndex(end);
}
return result;
}
/**
* When this returns, the ACI's current position will be at the start of the
* first run which does NOT contain a GraphicAttribute. If no such run exists
* the ACI's position will be at the end, and this method will return false.
*/
static boolean advanceToFirstFont(AttributedCharacterIterator aci) {
for (char ch = aci.first();
ch != CharacterIterator.DONE;
ch = aci.setIndex(aci.getRunLimit()))
{
if (aci.getAttribute(TextAttribute.CHAR_REPLACEMENT) == null) {
return true;
}
}
return false;
}
/**
* When this returns, the ACI's current position will be at the start of the
* first run which does NOT contain a GraphicAttribute. If no such run exists
* the ACI's position will be at the end, and this method will return false.
*/
static boolean advanceToFirstFont(AttributedCharacterIterator aci) {
for (char ch = aci.first();
ch != CharacterIterator.DONE;
ch = aci.setIndex(aci.getRunLimit()))
{
if (aci.getAttribute(TextAttribute.CHAR_REPLACEMENT) == null) {
return true;
}
}
return false;
}
/**
* When this returns, the ACI's current position will be at the start of the
* first run which does NOT contain a GraphicAttribute. If no such run exists
* the ACI's position will be at the end, and this method will return false.
*/
static boolean advanceToFirstFont(AttributedCharacterIterator aci) {
for (char ch = aci.first();
ch != CharacterIterator.DONE;
ch = aci.setIndex(aci.getRunLimit()))
{
if (aci.getAttribute(TextAttribute.CHAR_REPLACEMENT) == null) {
return true;
}
}
return false;
}
private static final void checkIteratorAttribute(AttributedCharacterIterator iterator, int index, Attribute key, Object expectedValue) throws Exception {
iterator.setIndex(index);
Object value = iterator.getAttribute(key);
if (!((expectedValue == null && value == null) || (expectedValue != null && expectedValue.equals(value)))) {
throwException(iterator, "iterator returns wrong attribute value - " + value + " instead of " + expectedValue);
}
value = iterator.getAttributes().get(key);
if (!((expectedValue == null && value == null) || (expectedValue != null && expectedValue.equals(value)))) {
throwException(iterator, "iterator's map returns wrong attribute value - " + value + " instead of " + expectedValue);
}
}
/**
* When this returns, the ACI's current position will be at the start of the
* first run which does NOT contain a GraphicAttribute. If no such run exists
* the ACI's position will be at the end, and this method will return false.
*/
static boolean advanceToFirstFont(AttributedCharacterIterator aci) {
for (char ch = aci.first(); ch != aci.DONE; ch = aci.setIndex(aci.getRunLimit())) {
if (aci.getAttribute(TextAttribute.CHAR_REPLACEMENT) == null) {
return true;
}
}
return false;
}
public static void main(String[] args) throws Exception {
String text = "Hello world";
AttributedString as = new AttributedString(text);
// add non-Annotation attributes
as.addAttribute(TextAttribute.WEIGHT,
TextAttribute.WEIGHT_LIGHT,
0,
3);
as.addAttribute(TextAttribute.WEIGHT,
TextAttribute.WEIGHT_BOLD,
3,
5);
as.addAttribute(TextAttribute.WEIGHT,
TextAttribute.WEIGHT_EXTRABOLD,
5,
text.length());
// add Annotation attributes
as.addAttribute(TextAttribute.WIDTH,
new Annotation(TextAttribute.WIDTH_EXTENDED),
0,
3);
as.addAttribute(TextAttribute.WIDTH,
new Annotation(TextAttribute.WIDTH_CONDENSED),
3,
4);
AttributedCharacterIterator aci = as.getIterator(null, 2, 4);
aci.first();
int runStart = aci.getRunStart();
if (runStart != 2) {
throw new Exception("1st run start is wrong. ("+runStart+" should be 2.)");
}
int runLimit = aci.getRunLimit();
if (runLimit != 3) {
throw new Exception("1st run limit is wrong. ("+runLimit+" should be 3.)");
}
Object value = aci.getAttribute(TextAttribute.WEIGHT);
if (value != TextAttribute.WEIGHT_LIGHT) {
throw new Exception("1st run attribute is wrong. ("
+value+" should be "+TextAttribute.WEIGHT_LIGHT+".)");
}
value = aci.getAttribute(TextAttribute.WIDTH);
if (value != null) {
throw new Exception("1st run annotation is wrong. ("
+value+" should be null.)");
}
aci.setIndex(runLimit);
runStart = aci.getRunStart();
if (runStart != 3) {
throw new Exception("2nd run start is wrong. ("+runStart+" should be 3.)");
}
runLimit = aci.getRunLimit();
if (runLimit != 4) {
throw new Exception("2nd run limit is wrong. ("+runLimit+" should be 4.)");
}
value = aci.getAttribute(TextAttribute.WEIGHT);
if (value != TextAttribute.WEIGHT_BOLD) {
throw new Exception("2nd run attribute is wrong. ("
+value+" should be "+TextAttribute.WEIGHT_BOLD+".)");
}
value = aci.getAttribute(TextAttribute.WIDTH);
if (!(value instanceof Annotation)
|| (((Annotation)value).getValue() != TextAttribute.WIDTH_CONDENSED)) {
throw new Exception("2nd run annotation is wrong. (" + value + " should be "
+ new Annotation(TextAttribute.WIDTH_CONDENSED)+".)");
}
}
public static void main(String[] args) throws Exception {
String text = "Hello world";
AttributedString as = new AttributedString(text);
// add non-Annotation attributes
as.addAttribute(TextAttribute.WEIGHT,
TextAttribute.WEIGHT_LIGHT,
0,
3);
as.addAttribute(TextAttribute.WEIGHT,
TextAttribute.WEIGHT_BOLD,
3,
5);
as.addAttribute(TextAttribute.WEIGHT,
TextAttribute.WEIGHT_EXTRABOLD,
5,
text.length());
// add Annotation attributes
as.addAttribute(TextAttribute.WIDTH,
new Annotation(TextAttribute.WIDTH_EXTENDED),
0,
3);
as.addAttribute(TextAttribute.WIDTH,
new Annotation(TextAttribute.WIDTH_CONDENSED),
3,
4);
AttributedCharacterIterator aci = as.getIterator(null, 2, 4);
aci.first();
int runStart = aci.getRunStart();
if (runStart != 2) {
throw new Exception("1st run start is wrong. ("+runStart+" should be 2.)");
}
int runLimit = aci.getRunLimit();
if (runLimit != 3) {
throw new Exception("1st run limit is wrong. ("+runLimit+" should be 3.)");
}
Object value = aci.getAttribute(TextAttribute.WEIGHT);
if (value != TextAttribute.WEIGHT_LIGHT) {
throw new Exception("1st run attribute is wrong. ("
+value+" should be "+TextAttribute.WEIGHT_LIGHT+".)");
}
value = aci.getAttribute(TextAttribute.WIDTH);
if (value != null) {
throw new Exception("1st run annotation is wrong. ("
+value+" should be null.)");
}
aci.setIndex(runLimit);
runStart = aci.getRunStart();
if (runStart != 3) {
throw new Exception("2nd run start is wrong. ("+runStart+" should be 3.)");
}
runLimit = aci.getRunLimit();
if (runLimit != 4) {
throw new Exception("2nd run limit is wrong. ("+runLimit+" should be 4.)");
}
value = aci.getAttribute(TextAttribute.WEIGHT);
if (value != TextAttribute.WEIGHT_BOLD) {
throw new Exception("2nd run attribute is wrong. ("
+value+" should be "+TextAttribute.WEIGHT_BOLD+".)");
}
value = aci.getAttribute(TextAttribute.WIDTH);
if (!(value instanceof Annotation)
|| (((Annotation)value).getValue() != TextAttribute.WIDTH_CONDENSED)) {
throw new Exception("2nd run annotation is wrong. (" + value + " should be "
+ new Annotation(TextAttribute.WIDTH_CONDENSED)+".)");
}
}
/**
* Perform the Unicode Bidi algorithm on a given paragraph, as defined in the
* <a href="http://www.unicode.org/unicode/reports/tr9/">Unicode Standard Annex #9</a>,
* version 13,
* also described in The Unicode Standard, Version 4.0 .<p>
*
* This method takes a paragraph of text and computes the
* left-right-directionality of each character. The text should not
* contain any Unicode block separators.<p>
*
* The RUN_DIRECTION attribute in the text, if present, determines the base
* direction (left-to-right or right-to-left). If not present, the base
* direction is computed using the Unicode Bidirectional Algorithm,
* defaulting to left-to-right if there are no strong directional characters
* in the text. This attribute, if present, must be applied to all the text
* in the paragraph.<p>
*
* The BIDI_EMBEDDING attribute in the text, if present, represents
* embedding level information. Negative values from -1 to -62 indicate
* overrides at the absolute value of the level. Positive values from 1 to
* 62 indicate embeddings. Where values are zero or not defined, the base
* embedding level as determined by the base direction is assumed.<p>
*
* The NUMERIC_SHAPING attribute in the text, if present, converts European
* digits to other decimal digits before running the bidi algorithm. This
* attribute, if present, must be applied to all the text in the paragraph.
*
* If the entire text is all of the same directionality, then
* the method may not perform all the steps described by the algorithm,
* i.e., some levels may not be the same as if all steps were performed.
* This is not relevant for unidirectional text.<br>
* For example, in pure LTR text with numbers the numbers would get
* a resolved level of 2 higher than the surrounding text according to
* the algorithm. This implementation may set all resolved levels to
* the same value in such a case.<p>
*
* @param paragraph a paragraph of text with optional character and
* paragraph attribute information
* @stable ICU 3.8
*/
public void setPara(AttributedCharacterIterator paragraph)
{
byte paraLvl;
char ch = paragraph.first();
Boolean runDirection =
(Boolean) paragraph.getAttribute(TextAttributeConstants.RUN_DIRECTION);
Object shaper = paragraph.getAttribute(TextAttributeConstants.NUMERIC_SHAPING);
if (runDirection == null) {
paraLvl = INTERNAL_LEVEL_DEFAULT_LTR;
} else {
paraLvl = (runDirection.equals(TextAttributeConstants.RUN_DIRECTION_LTR)) ?
(byte)Bidi.DIRECTION_LEFT_TO_RIGHT : (byte)Bidi.DIRECTION_RIGHT_TO_LEFT;
}
byte[] lvls = null;
int len = paragraph.getEndIndex() - paragraph.getBeginIndex();
byte[] embeddingLevels = new byte[len];
char[] txt = new char[len];
int i = 0;
while (ch != AttributedCharacterIterator.DONE) {
txt[i] = ch;
Integer embedding =
(Integer) paragraph.getAttribute(TextAttributeConstants.BIDI_EMBEDDING);
if (embedding != null) {
byte level = embedding.byteValue();
if (level == 0) {
/* no-op */
} else if (level < 0) {
lvls = embeddingLevels;
embeddingLevels[i] = (byte)((0 - level) | INTERNAL_LEVEL_OVERRIDE);
} else {
lvls = embeddingLevels;
embeddingLevels[i] = level;
}
}
ch = paragraph.next();
++i;
}
if (shaper != null) {
NumericShapings.shape(shaper, txt, 0, len);
}
setPara(txt, paraLvl, lvls);
}
public static void main(String[] args) throws Exception {
String text = "Hello world";
AttributedString as = new AttributedString(text);
// add non-Annotation attributes
as.addAttribute(TextAttribute.WEIGHT,
TextAttribute.WEIGHT_LIGHT,
0,
3);
as.addAttribute(TextAttribute.WEIGHT,
TextAttribute.WEIGHT_BOLD,
3,
5);
as.addAttribute(TextAttribute.WEIGHT,
TextAttribute.WEIGHT_EXTRABOLD,
5,
text.length());
// add Annotation attributes
as.addAttribute(TextAttribute.WIDTH,
new Annotation(TextAttribute.WIDTH_EXTENDED),
0,
3);
as.addAttribute(TextAttribute.WIDTH,
new Annotation(TextAttribute.WIDTH_CONDENSED),
3,
4);
AttributedCharacterIterator aci = as.getIterator(null, 2, 4);
aci.first();
int runStart = aci.getRunStart();
if (runStart != 2) {
throw new Exception("1st run start is wrong. ("+runStart+" should be 2.)");
}
int runLimit = aci.getRunLimit();
if (runLimit != 3) {
throw new Exception("1st run limit is wrong. ("+runLimit+" should be 3.)");
}
Object value = aci.getAttribute(TextAttribute.WEIGHT);
if (value != TextAttribute.WEIGHT_LIGHT) {
throw new Exception("1st run attribute is wrong. ("
+value+" should be "+TextAttribute.WEIGHT_LIGHT+".)");
}
value = aci.getAttribute(TextAttribute.WIDTH);
if (value != null) {
throw new Exception("1st run annotation is wrong. ("
+value+" should be null.)");
}
aci.setIndex(runLimit);
runStart = aci.getRunStart();
if (runStart != 3) {
throw new Exception("2nd run start is wrong. ("+runStart+" should be 3.)");
}
runLimit = aci.getRunLimit();
if (runLimit != 4) {
throw new Exception("2nd run limit is wrong. ("+runLimit+" should be 4.)");
}
value = aci.getAttribute(TextAttribute.WEIGHT);
if (value != TextAttribute.WEIGHT_BOLD) {
throw new Exception("2nd run attribute is wrong. ("
+value+" should be "+TextAttribute.WEIGHT_BOLD+".)");
}
value = aci.getAttribute(TextAttribute.WIDTH);
if (!(value instanceof Annotation)
|| (((Annotation)value).getValue() != TextAttribute.WIDTH_CONDENSED)) {
throw new Exception("2nd run annotation is wrong. (" + value + " should be "
+ new Annotation(TextAttribute.WIDTH_CONDENSED)+".)");
}
}
/**
* Perform the Unicode Bidi algorithm on a given paragraph, as defined in the
* <a href="http://www.unicode.org/unicode/reports/tr9/">Unicode Standard Annex #9</a>,
* version 13,
* also described in The Unicode Standard, Version 4.0 .<p>
*
* This method takes a paragraph of text and computes the
* left-right-directionality of each character. The text should not
* contain any Unicode block separators.<p>
*
* The RUN_DIRECTION attribute in the text, if present, determines the base
* direction (left-to-right or right-to-left). If not present, the base
* direction is computed using the Unicode Bidirectional Algorithm,
* defaulting to left-to-right if there are no strong directional characters
* in the text. This attribute, if present, must be applied to all the text
* in the paragraph.<p>
*
* The BIDI_EMBEDDING attribute in the text, if present, represents
* embedding level information. Negative values from -1 to -62 indicate
* overrides at the absolute value of the level. Positive values from 1 to
* 62 indicate embeddings. Where values are zero or not defined, the base
* embedding level as determined by the base direction is assumed.<p>
*
* The NUMERIC_SHAPING attribute in the text, if present, converts European
* digits to other decimal digits before running the bidi algorithm. This
* attribute, if present, must be applied to all the text in the paragraph.
*
* If the entire text is all of the same directionality, then
* the method may not perform all the steps described by the algorithm,
* i.e., some levels may not be the same as if all steps were performed.
* This is not relevant for unidirectional text.<br>
* For example, in pure LTR text with numbers the numbers would get
* a resolved level of 2 higher than the surrounding text according to
* the algorithm. This implementation may set all resolved levels to
* the same value in such a case.<p>
*
* @param paragraph a paragraph of text with optional character and
* paragraph attribute information
* @stable ICU 3.8
*/
public void setPara(AttributedCharacterIterator paragraph)
{
byte paraLvl;
char ch = paragraph.first();
Boolean runDirection =
(Boolean) paragraph.getAttribute(TextAttributeConstants.RUN_DIRECTION);
Object shaper = paragraph.getAttribute(TextAttributeConstants.NUMERIC_SHAPING);
if (runDirection == null) {
paraLvl = INTERNAL_LEVEL_DEFAULT_LTR;
} else {
paraLvl = (runDirection.equals(TextAttributeConstants.RUN_DIRECTION_LTR)) ?
(byte)Bidi.DIRECTION_LEFT_TO_RIGHT : (byte)Bidi.DIRECTION_RIGHT_TO_LEFT;
}
byte[] lvls = null;
int len = paragraph.getEndIndex() - paragraph.getBeginIndex();
byte[] embeddingLevels = new byte[len];
char[] txt = new char[len];
int i = 0;
while (ch != AttributedCharacterIterator.DONE) {
txt[i] = ch;
Integer embedding =
(Integer) paragraph.getAttribute(TextAttributeConstants.BIDI_EMBEDDING);
if (embedding != null) {
byte level = embedding.byteValue();
if (level == 0) {
/* no-op */
} else if (level < 0) {
lvls = embeddingLevels;
embeddingLevels[i] = (byte)((0 - level) | INTERNAL_LEVEL_OVERRIDE);
} else {
lvls = embeddingLevels;
embeddingLevels[i] = level;
}
}
ch = paragraph.next();
++i;
}
if (shaper != null) {
NumericShapings.shape(shaper, txt, 0, len);
}
setPara(txt, paraLvl, lvls);
}