/**
* Return a StyledParagraph reflecting the insertion of a single character into the text. This
* method will attempt to reuse the given paragraph, but may create a new paragraph.
*
* @param aci an iterator over the text. The text should be the same as the text used to create
* (or most recently update) oldParagraph, with the exception of deleting a single character
* at deletePos.
* @param chars the characters in aci
* @param deletePos the index where a character was removed
* @param oldParagraph a StyledParagraph for the text in aci before the insertion
*/
public static StyledParagraph deleteChar(
AttributedCharacterIterator aci, char[] chars, int deletePos, StyledParagraph oldParagraph) {
// We will reuse oldParagraph unless there was a length-1 run
// at deletePos. We could do more work and check the individual
// Font and Decoration runs, but we don't right now...
deletePos -= aci.getBeginIndex();
if (oldParagraph.decorations == null && oldParagraph.fonts == null) {
oldParagraph.length -= 1;
return oldParagraph;
}
if (oldParagraph.getRunLimit(deletePos) == deletePos + 1) {
if (deletePos == 0 || oldParagraph.getRunLimit(deletePos - 1) == deletePos) {
return new StyledParagraph(aci, chars);
}
}
oldParagraph.length -= 1;
if (oldParagraph.decorations != null) {
deleteFrom(deletePos, oldParagraph.decorationStarts, oldParagraph.decorations.size());
}
if (oldParagraph.fonts != null) {
deleteFrom(deletePos, oldParagraph.fontStarts, oldParagraph.fonts.size());
}
return oldParagraph;
}
/**
* Return a StyledParagraph reflecting the insertion of a single character into the text. This
* method will attempt to reuse the given paragraph, but may create a new paragraph.
*
* @param aci an iterator over the text. The text should be the same as the text used to create
* (or most recently update) oldParagraph, with the exception of inserting a single character
* at insertPos.
* @param chars the characters in aci
* @param insertPos the index of the new character in aci
* @param oldParagraph a StyledParagraph for the text in aci before the insertion
*/
public static StyledParagraph insertChar(
AttributedCharacterIterator aci, char[] chars, int insertPos, StyledParagraph oldParagraph) {
// If the styles at insertPos match those at insertPos-1,
// oldParagraph will be reused. Otherwise we create a new
// paragraph.
char ch = aci.setIndex(insertPos);
int relativePos = Math.max(insertPos - aci.getBeginIndex() - 1, 0);
Map attributes = addInputMethodAttrs(aci.getAttributes());
Decoration d = Decoration.getDecoration(attributes);
if (!oldParagraph.getDecorationAt(relativePos).equals(d)) {
return new StyledParagraph(aci, chars);
}
Object f = getGraphicOrFont(attributes);
if (f == null) {
FontResolver resolver = FontResolver.getInstance();
int fontIndex = resolver.getFontIndex(ch);
f = resolver.getFont(fontIndex, attributes);
}
if (!oldParagraph.getFontOrGraphicAt(relativePos).equals(f)) {
return new StyledParagraph(aci, chars);
}
// insert into existing paragraph
oldParagraph.length += 1;
if (oldParagraph.decorations != null) {
insertInto(relativePos, oldParagraph.decorationStarts, oldParagraph.decorations.size());
}
if (oldParagraph.fonts != null) {
insertInto(relativePos, oldParagraph.fontStarts, oldParagraph.fonts.size());
}
return oldParagraph;
}
/**
* Updates the <code>TextMeasurer</code> after a single character has been deleted from the
* paragraph currently represented by this <code>TextMeasurer</code>. After this call, this <code>
* TextMeasurer</code> is equivalent to a new <code>TextMeasurer</code> created from the text;
* however, it will usually be more efficient to update an existing <code>TextMeasurer</code> than
* to create a new one from scratch.
*
* @param newParagraph the text of the paragraph after performing the deletion. Cannot be null.
* @param deletePos the position in the text where the character was removed. Must not be less
* than the start of <code>newParagraph</code>, and must not be greater than the end of <code>
* newParagraph</code>.
* @throws IndexOutOfBoundsException if <code>deletePos</code> is less than the start of <code>
* newParagraph</code> or greater than the end of <code>newParagraph</code>
* @throws NullPointerException if <code>newParagraph</code> is <code>null</code>
*/
public void deleteChar(AttributedCharacterIterator newParagraph, int deletePos) {
fStart = newParagraph.getBeginIndex();
int end = newParagraph.getEndIndex();
if (end - fStart != fChars.length - 1) {
initAll(newParagraph);
}
char[] newChars = new char[end - fStart];
int changedIndex = deletePos - fStart;
System.arraycopy(fChars, 0, newChars, 0, deletePos - fStart);
System.arraycopy(fChars, changedIndex + 1, newChars, changedIndex, end - deletePos);
fChars = newChars;
if (fBidi != null) {
fBidi = new Bidi(newParagraph);
if (fBidi.isLeftToRight()) {
fBidi = null;
}
}
fParagraph = StyledParagraph.deleteChar(newParagraph, fChars, deletePos, fParagraph);
invalidateComponents();
}
/**
* Updates the <code>TextMeasurer</code> after a single character has been inserted into the
* paragraph currently represented by this <code>TextMeasurer</code>. After this call, this <code>
* TextMeasurer</code> is equivalent to a new <code>TextMeasurer</code> created from the text;
* however, it will usually be more efficient to update an existing <code>TextMeasurer</code> than
* to create a new one from scratch.
*
* @param newParagraph the text of the paragraph after performing the insertion. Cannot be null.
* @param insertPos the position in the text where the character was inserted. Must not be less
* than the start of <code>newParagraph</code>, and must be less than the end of <code>
* newParagraph</code>.
* @throws IndexOutOfBoundsException if <code>insertPos</code> is less than the start of <code>
* newParagraph</code> or greater than or equal to the end of <code>newParagraph</code>
* @throws NullPointerException if <code>newParagraph</code> is <code>null</code>
*/
public void insertChar(AttributedCharacterIterator newParagraph, int insertPos) {
if (collectStats) {
printStats();
}
if (wantStats) {
collectStats = true;
}
fStart = newParagraph.getBeginIndex();
int end = newParagraph.getEndIndex();
if (end - fStart != fChars.length + 1) {
initAll(newParagraph);
}
char[] newChars = new char[end - fStart];
int newCharIndex = insertPos - fStart;
System.arraycopy(fChars, 0, newChars, 0, newCharIndex);
char newChar = newParagraph.setIndex(insertPos);
newChars[newCharIndex] = newChar;
System.arraycopy(fChars, newCharIndex, newChars, newCharIndex + 1, end - insertPos - 1);
fChars = newChars;
if (fBidi != null
|| Bidi.requiresBidi(newChars, newCharIndex, newCharIndex + 1)
|| newParagraph.getAttribute(TextAttribute.BIDI_EMBEDDING) != null) {
fBidi = new Bidi(newParagraph);
if (fBidi.isLeftToRight()) {
fBidi = null;
}
}
fParagraph = StyledParagraph.insertChar(newParagraph, fChars, insertPos, fParagraph);
invalidateComponents();
}