| Methods Summary |
|---|
| public void | addDocumentListener(javax.swing.event.DocumentListener listener)Adds a document listener for notification of any changes.
synchronized(listeningStyles) {
int oldDLCount = listenerList.getListenerCount
(DocumentListener.class);
super.addDocumentListener(listener);
if (oldDLCount == 0) {
if (styleContextChangeListener == null) {
styleContextChangeListener =
createStyleContextChangeListener();
}
if (styleContextChangeListener != null) {
StyleContext styles = (StyleContext)getAttributeContext();
styles.addChangeListener(styleContextChangeListener);
}
updateStylesListeningTo();
}
}
|
| public javax.swing.text.Style | addStyle(java.lang.String nm, javax.swing.text.Style parent)Adds a new style into the logical style hierarchy. Style attributes
resolve from bottom up so an attribute specified in a child
will override an attribute specified in the parent.
StyleContext styles = (StyleContext) getAttributeContext();
return styles.addStyle(nm, parent);
|
| protected void | create(javax.swing.text.DefaultStyledDocument$ElementSpec[] data)Initialize the document to reflect the given element
structure (i.e. the structure reported by the
getDefaultRootElement method. If the
document contained any data it will first be removed.
try {
if (getLength() != 0) {
remove(0, getLength());
}
writeLock();
// install the content
Content c = getContent();
int n = data.length;
StringBuffer sb = new StringBuffer();
for (int i = 0; i < n; i++) {
ElementSpec es = data[i];
if (es.getLength() > 0) {
sb.append(es.getArray(), es.getOffset(), es.getLength());
}
}
UndoableEdit cEdit = c.insertString(0, sb.toString());
// build the event and element structure
int length = sb.length();
DefaultDocumentEvent evnt =
new DefaultDocumentEvent(0, length, DocumentEvent.EventType.INSERT);
evnt.addEdit(cEdit);
buffer.create(length, data, evnt);
// update bidi (possibly)
super.insertUpdate(evnt, null);
// notify the listeners
evnt.end();
fireInsertUpdate(evnt);
fireUndoableEditUpdate(new UndoableEditEvent(this, evnt));
} catch (BadLocationException ble) {
throw new StateInvariantError("problem initializing");
} finally {
writeUnlock();
}
|
| protected AbstractElement | createDefaultRoot()Creates the root element to be used to represent the
default document structure.
// grabs a write-lock for this initialization and
// abandon it during initialization so in normal
// operation we can detect an illegitimate attempt
// to mutate attributes.
writeLock();
BranchElement section = new SectionElement();
BranchElement paragraph = new BranchElement(section, null);
LeafElement brk = new LeafElement(paragraph, null, 0, 1);
Element[] buff = new Element[1];
buff[0] = brk;
paragraph.replace(0, 0, buff);
buff[0] = paragraph;
section.replace(0, 0, buff);
writeUnlock();
return section;
|
| short | createSpecsForInsertAfterNewline(javax.swing.text.Element paragraph, javax.swing.text.Element pParagraph, javax.swing.text.AttributeSet pattr, java.util.Vector parseBuffer, int offset, int endOffset)This is called by insertUpdate when inserting after a new line.
It generates, in parseBuffer, ElementSpecs that will
position the stack in paragraph.
It returns the direction the last StartSpec should have (this don't
necessarily create the last start spec).
// Need to find the common parent of pParagraph and paragraph.
if(paragraph.getParentElement() == pParagraph.getParentElement()) {
// The simple (and common) case that pParagraph and
// paragraph have the same parent.
ElementSpec spec = new ElementSpec(pattr, ElementSpec.EndTagType);
parseBuffer.addElement(spec);
spec = new ElementSpec(pattr, ElementSpec.StartTagType);
parseBuffer.addElement(spec);
if(pParagraph.getEndOffset() != endOffset)
return ElementSpec.JoinFractureDirection;
Element parent = pParagraph.getParentElement();
if((parent.getElementIndex(offset) + 1) < parent.getElementCount())
return ElementSpec.JoinNextDirection;
}
else {
// Will only happen for text with more than 2 levels.
// Find the common parent of a paragraph and pParagraph
Vector leftParents = new Vector();
Vector rightParents = new Vector();
Element e = pParagraph;
while(e != null) {
leftParents.addElement(e);
e = e.getParentElement();
}
e = paragraph;
int leftIndex = -1;
while(e != null && (leftIndex = leftParents.indexOf(e)) == -1) {
rightParents.addElement(e);
e = e.getParentElement();
}
if(e != null) {
// e identifies the common parent.
// Build the ends.
for(int counter = 0; counter < leftIndex;
counter++) {
parseBuffer.addElement(new ElementSpec
(null, ElementSpec.EndTagType));
}
// And the starts.
ElementSpec spec = null;
for(int counter = rightParents.size() - 1;
counter >= 0; counter--) {
spec = new ElementSpec(((Element)rightParents.
elementAt(counter)).getAttributes(),
ElementSpec.StartTagType);
if(counter > 0)
spec.setDirection(ElementSpec.JoinNextDirection);
parseBuffer.addElement(spec);
}
// If there are right parents, then we generated starts
// down the right subtree and there will be an element to
// join to.
if(rightParents.size() > 0)
return ElementSpec.JoinNextDirection;
// No right subtree, e.getElement(endOffset) is a
// leaf. There will be a facture.
return ElementSpec.JoinFractureDirection;
}
// else: Could throw an exception here, but should never get here!
}
return ElementSpec.OriginateDirection;
|
| javax.swing.event.ChangeListener | createStyleChangeListener()Returns a new instance of StyleChangeHandler.
return new StyleChangeHandler();
|
| javax.swing.event.ChangeListener | createStyleContextChangeListener()Returns a new instance of StyleContextChangeHandler.
return new StyleContextChangeHandler();
|
| public java.awt.Color | getBackground(javax.swing.text.AttributeSet attr)Gets the background color from an attribute set.
StyleContext styles = (StyleContext) getAttributeContext();
return styles.getBackground(attr);
|
| public javax.swing.text.Element | getCharacterElement(int pos)Gets a character element based on a position.
Element e = null;
for (e = getDefaultRootElement(); ! e.isLeaf(); ) {
int index = e.getElementIndex(pos);
e = e.getElement(index);
}
return e;
|
| public javax.swing.text.Element | getDefaultRootElement()Gets the default root element.
return buffer.getRootElement();
|
| public java.awt.Font | getFont(javax.swing.text.AttributeSet attr)Gets the font from an attribute set.
StyleContext styles = (StyleContext) getAttributeContext();
return styles.getFont(attr);
|
| public java.awt.Color | getForeground(javax.swing.text.AttributeSet attr)Gets the foreground color from an attribute set.
StyleContext styles = (StyleContext) getAttributeContext();
return styles.getForeground(attr);
|
| public javax.swing.text.Style | getLogicalStyle(int p)Fetches the logical style assigned to the paragraph
represented by the given position.
Style s = null;
Element paragraph = getParagraphElement(p);
if (paragraph != null) {
AttributeSet a = paragraph.getAttributes();
AttributeSet parent = a.getResolveParent();
if (parent instanceof Style) {
s = (Style) parent;
}
}
return s;
|
| public javax.swing.text.Element | getParagraphElement(int pos)Gets the paragraph element at the offset pos.
A paragraph consists of at least one child Element, which is usually
a leaf.
Element e = null;
for (e = getDefaultRootElement(); ! e.isLeaf(); ) {
int index = e.getElementIndex(pos);
e = e.getElement(index);
}
if(e != null)
return e.getParentElement();
return e;
|
| public javax.swing.text.Style | getStyle(java.lang.String nm)Fetches a named style previously added.
StyleContext styles = (StyleContext) getAttributeContext();
return styles.getStyle(nm);
|
| public java.util.Enumeration | getStyleNames()Fetches the list of of style names.
return ((StyleContext) getAttributeContext()).getStyleNames();
|
| protected void | insert(int offset, javax.swing.text.DefaultStyledDocument$ElementSpec[] data)Inserts new elements in bulk. This is useful to allow
parsing with the document in an unlocked state and
prepare an element structure modification. This method
takes an array of tokens that describe how to update an
element structure so the time within a write lock can
be greatly reduced in an asynchronous update situation.
This method is thread safe, although most Swing methods
are not. Please see
Threads
and Swing for more information.
if (data == null || data.length == 0) {
return;
}
try {
writeLock();
// install the content
Content c = getContent();
int n = data.length;
StringBuffer sb = new StringBuffer();
for (int i = 0; i < n; i++) {
ElementSpec es = data[i];
if (es.getLength() > 0) {
sb.append(es.getArray(), es.getOffset(), es.getLength());
}
}
if (sb.length() == 0) {
// Nothing to insert, bail.
return;
}
UndoableEdit cEdit = c.insertString(offset, sb.toString());
// create event and build the element structure
int length = sb.length();
DefaultDocumentEvent evnt =
new DefaultDocumentEvent(offset, length, DocumentEvent.EventType.INSERT);
evnt.addEdit(cEdit);
buffer.insert(offset, length, data, evnt);
// update bidi (possibly)
super.insertUpdate(evnt, null);
// notify the listeners
evnt.end();
fireInsertUpdate(evnt);
fireUndoableEditUpdate(new UndoableEditEvent(this, evnt));
} finally {
writeUnlock();
}
|
| protected void | insertUpdate(DefaultDocumentEvent chng, javax.swing.text.AttributeSet attr)Updates document structure as a result of text insertion. This
will happen within a write lock. This implementation simply
parses the inserted content for line breaks and builds up a set
of instructions for the element buffer.
int offset = chng.getOffset();
int length = chng.getLength();
if (attr == null) {
attr = SimpleAttributeSet.EMPTY;
}
// Paragraph attributes should come from point after insertion.
// You really only notice this when inserting at a paragraph
// boundary.
Element paragraph = getParagraphElement(offset + length);
AttributeSet pattr = paragraph.getAttributes();
// Character attributes should come from actual insertion point.
Element pParagraph = getParagraphElement(offset);
Element run = pParagraph.getElement(pParagraph.getElementIndex
(offset));
int endOffset = offset + length;
boolean insertingAtBoundry = (run.getEndOffset() == endOffset);
AttributeSet cattr = run.getAttributes();
try {
Segment s = new Segment();
Vector parseBuffer = new Vector();
ElementSpec lastStartSpec = null;
boolean insertingAfterNewline = false;
short lastStartDirection = ElementSpec.OriginateDirection;
// Check if the previous character was a newline.
if (offset > 0) {
getText(offset - 1, 1, s);
if (s.array[s.offset] == '\n") {
// Inserting after a newline.
insertingAfterNewline = true;
lastStartDirection = createSpecsForInsertAfterNewline
(paragraph, pParagraph, pattr, parseBuffer,
offset, endOffset);
for(int counter = parseBuffer.size() - 1; counter >= 0;
counter--) {
ElementSpec spec = (ElementSpec)parseBuffer.
elementAt(counter);
if(spec.getType() == ElementSpec.StartTagType) {
lastStartSpec = spec;
break;
}
}
}
}
// If not inserting after a new line, pull the attributes for
// new paragraphs from the paragraph under the insertion point.
if(!insertingAfterNewline)
pattr = pParagraph.getAttributes();
getText(offset, length, s);
char[] txt = s.array;
int n = s.offset + s.count;
int lastOffset = s.offset;
for (int i = s.offset; i < n; i++) {
if (txt[i] == '\n") {
int breakOffset = i + 1;
parseBuffer.addElement(
new ElementSpec(attr, ElementSpec.ContentType,
breakOffset - lastOffset));
parseBuffer.addElement(
new ElementSpec(null, ElementSpec.EndTagType));
lastStartSpec = new ElementSpec(pattr, ElementSpec.
StartTagType);
parseBuffer.addElement(lastStartSpec);
lastOffset = breakOffset;
}
}
if (lastOffset < n) {
parseBuffer.addElement(
new ElementSpec(attr, ElementSpec.ContentType,
n - lastOffset));
}
ElementSpec first = (ElementSpec) parseBuffer.firstElement();
int docLength = getLength();
// Check for join previous of first content.
if(first.getType() == ElementSpec.ContentType &&
cattr.isEqual(attr)) {
first.setDirection(ElementSpec.JoinPreviousDirection);
}
// Do a join fracture/next for last start spec if necessary.
if(lastStartSpec != null) {
if(insertingAfterNewline) {
lastStartSpec.setDirection(lastStartDirection);
}
// Join to the fracture if NOT inserting at the end
// (fracture only happens when not inserting at end of
// paragraph).
else if(pParagraph.getEndOffset() != endOffset) {
lastStartSpec.setDirection(ElementSpec.
JoinFractureDirection);
}
// Join to next if parent of pParagraph has another
// element after pParagraph, and it isn't a leaf.
else {
Element parent = pParagraph.getParentElement();
int pParagraphIndex = parent.getElementIndex(offset);
if((pParagraphIndex + 1) < parent.getElementCount() &&
!parent.getElement(pParagraphIndex + 1).isLeaf()) {
lastStartSpec.setDirection(ElementSpec.
JoinNextDirection);
}
}
}
// Do a JoinNext for last spec if it is content, it doesn't
// already have a direction set, no new paragraphs have been
// inserted or a new paragraph has been inserted and its join
// direction isn't originate, and the element at endOffset
// is a leaf.
if(insertingAtBoundry && endOffset < docLength) {
ElementSpec last = (ElementSpec) parseBuffer.lastElement();
if(last.getType() == ElementSpec.ContentType &&
last.getDirection() != ElementSpec.JoinPreviousDirection &&
((lastStartSpec == null && (paragraph == pParagraph ||
insertingAfterNewline)) ||
(lastStartSpec != null && lastStartSpec.getDirection() !=
ElementSpec.OriginateDirection))) {
Element nextRun = paragraph.getElement(paragraph.
getElementIndex(endOffset));
// Don't try joining to a branch!
if(nextRun.isLeaf() &&
attr.isEqual(nextRun.getAttributes())) {
last.setDirection(ElementSpec.JoinNextDirection);
}
}
}
// If not inserting at boundary and there is going to be a
// fracture, then can join next on last content if cattr
// matches the new attributes.
else if(!insertingAtBoundry && lastStartSpec != null &&
lastStartSpec.getDirection() ==
ElementSpec.JoinFractureDirection) {
ElementSpec last = (ElementSpec) parseBuffer.lastElement();
if(last.getType() == ElementSpec.ContentType &&
last.getDirection() != ElementSpec.JoinPreviousDirection &&
attr.isEqual(cattr)) {
last.setDirection(ElementSpec.JoinNextDirection);
}
}
// Check for the composed text element. If it is, merge the character attributes
// into this element as well.
if (Utilities.isComposedTextAttributeDefined(attr)) {
((MutableAttributeSet)attr).addAttributes(cattr);
((MutableAttributeSet)attr).addAttribute(AbstractDocument.ElementNameAttribute,
AbstractDocument.ContentElementName);
}
ElementSpec[] spec = new ElementSpec[parseBuffer.size()];
parseBuffer.copyInto(spec);
buffer.insert(offset, length, spec, chng);
} catch (BadLocationException bl) {
}
super.insertUpdate( chng, attr );
|
| private void | readObject(java.io.ObjectInputStream s)
listeningStyles = new Vector();
s.defaultReadObject();
// Reinstall style listeners.
if (styleContextChangeListener == null &&
listenerList.getListenerCount(DocumentListener.class) > 0) {
styleContextChangeListener = createStyleContextChangeListener();
if (styleContextChangeListener != null) {
StyleContext styles = (StyleContext)getAttributeContext();
styles.addChangeListener(styleContextChangeListener);
}
updateStylesListeningTo();
}
|
| public void | removeDocumentListener(javax.swing.event.DocumentListener listener)Removes a document listener.
synchronized(listeningStyles) {
super.removeDocumentListener(listener);
if (listenerList.getListenerCount(DocumentListener.class) == 0) {
for (int counter = listeningStyles.size() - 1; counter >= 0;
counter--) {
((Style)listeningStyles.elementAt(counter)).
removeChangeListener(styleChangeListener);
}
listeningStyles.removeAllElements();
if (styleContextChangeListener != null) {
StyleContext styles = (StyleContext)getAttributeContext();
styles.removeChangeListener(styleContextChangeListener);
}
}
}
|
| public void | removeStyle(java.lang.String nm)Removes a named style previously added to the document.
StyleContext styles = (StyleContext) getAttributeContext();
styles.removeStyle(nm);
|
| protected void | removeUpdate(DefaultDocumentEvent chng)Updates document structure as a result of text removal.
super.removeUpdate(chng);
buffer.remove(chng.getOffset(), chng.getLength(), chng);
|
| public void | setCharacterAttributes(int offset, int length, javax.swing.text.AttributeSet s, boolean replace)Sets attributes for some part of the document.
A write lock is held by this operation while changes
are being made, and a DocumentEvent is sent to the listeners
after the change has been successfully completed.
This method is thread safe, although most Swing methods
are not. Please see
Threads
and Swing for more information.
if (length == 0) {
return;
}
try {
writeLock();
DefaultDocumentEvent changes =
new DefaultDocumentEvent(offset, length, DocumentEvent.EventType.CHANGE);
// split elements that need it
buffer.change(offset, length, changes);
AttributeSet sCopy = s.copyAttributes();
// PENDING(prinz) - this isn't a very efficient way to iterate
int lastEnd = Integer.MAX_VALUE;
for (int pos = offset; pos < (offset + length); pos = lastEnd) {
Element run = getCharacterElement(pos);
lastEnd = run.getEndOffset();
if (pos == lastEnd) {
// offset + length beyond length of document, bail.
break;
}
MutableAttributeSet attr = (MutableAttributeSet) run.getAttributes();
changes.addEdit(new AttributeUndoableEdit(run, sCopy, replace));
if (replace) {
attr.removeAttributes(attr);
}
attr.addAttributes(s);
}
changes.end();
fireChangedUpdate(changes);
fireUndoableEditUpdate(new UndoableEditEvent(this, changes));
} finally {
writeUnlock();
}
|
| public void | setLogicalStyle(int pos, javax.swing.text.Style s)Sets the logical style to use for the paragraph at the
given position. If attributes aren't explicitly set
for character and paragraph attributes they will resolve
through the logical style assigned to the paragraph, which
in turn may resolve through some hierarchy completely
independent of the element hierarchy in the document.
This method is thread safe, although most Swing methods
are not. Please see
Threads
and Swing for more information.
Element paragraph = getParagraphElement(pos);
if ((paragraph != null) && (paragraph instanceof AbstractElement)) {
try {
writeLock();
StyleChangeUndoableEdit edit = new StyleChangeUndoableEdit((AbstractElement)paragraph, s);
((AbstractElement)paragraph).setResolveParent(s);
int p0 = paragraph.getStartOffset();
int p1 = paragraph.getEndOffset();
DefaultDocumentEvent e =
new DefaultDocumentEvent(p0, p1 - p0, DocumentEvent.EventType.CHANGE);
e.addEdit(edit);
e.end();
fireChangedUpdate(e);
fireUndoableEditUpdate(new UndoableEditEvent(this, e));
} finally {
writeUnlock();
}
}
|
| public void | setParagraphAttributes(int offset, int length, javax.swing.text.AttributeSet s, boolean replace)Sets attributes for a paragraph.
This method is thread safe, although most Swing methods
are not. Please see
Threads
and Swing for more information.
try {
writeLock();
DefaultDocumentEvent changes =
new DefaultDocumentEvent(offset, length, DocumentEvent.EventType.CHANGE);
AttributeSet sCopy = s.copyAttributes();
// PENDING(prinz) - this assumes a particular element structure
Element section = getDefaultRootElement();
int index0 = section.getElementIndex(offset);
int index1 = section.getElementIndex(offset + ((length > 0) ? length - 1 : 0));
boolean isI18N = Boolean.TRUE.equals(getProperty(I18NProperty));
boolean hasRuns = false;
for (int i = index0; i <= index1; i++) {
Element paragraph = section.getElement(i);
MutableAttributeSet attr = (MutableAttributeSet) paragraph.getAttributes();
changes.addEdit(new AttributeUndoableEdit(paragraph, sCopy, replace));
if (replace) {
attr.removeAttributes(attr);
}
attr.addAttributes(s);
if (isI18N && !hasRuns) {
hasRuns = (attr.getAttribute(TextAttribute.RUN_DIRECTION) != null);
}
}
if (hasRuns) {
updateBidi( changes );
}
changes.end();
fireChangedUpdate(changes);
fireUndoableEditUpdate(new UndoableEditEvent(this, changes));
} finally {
writeUnlock();
}
|
| protected void | styleChanged(javax.swing.text.Style style)Called when any of this document's styles have changed.
Subclasses may wish to be intelligent about what gets damaged.
// Only propagate change updated if have content
if (getLength() != 0) {
// lazily create a ChangeUpdateRunnable
if (updateRunnable == null) {
updateRunnable = new ChangeUpdateRunnable();
}
// We may get a whole batch of these at once, so only
// queue the runnable if it is not already pending
synchronized(updateRunnable) {
if (!updateRunnable.isPending) {
SwingUtilities.invokeLater(updateRunnable);
updateRunnable.isPending = true;
}
}
}
|
| void | updateStylesListeningTo()Adds a ChangeListener to new styles, and removes ChangeListener from
old styles.
synchronized(listeningStyles) {
StyleContext styles = (StyleContext)getAttributeContext();
if (styleChangeListener == null) {
styleChangeListener = createStyleChangeListener();
}
if (styleChangeListener != null && styles != null) {
Enumeration styleNames = styles.getStyleNames();
Vector v = (Vector)listeningStyles.clone();
listeningStyles.removeAllElements();
while (styleNames.hasMoreElements()) {
String name = (String)styleNames.nextElement();
Style aStyle = styles.getStyle(name);
int index = v.indexOf(aStyle);
listeningStyles.addElement(aStyle);
if (index == -1) {
aStyle.addChangeListener(styleChangeListener);
}
else {
v.removeElementAt(index);
}
}
for (int counter = v.size() - 1; counter >= 0; counter--) {
Style aStyle = (Style)v.elementAt(counter);
aStyle.removeChangeListener(styleChangeListener);
}
if (listeningStyles.size() == 0) {
styleChangeListener = null;
}
}
}
|
