/**
* Alerts all listeners to this document of an insertion. This is overridden so we can update our
* syntax highlighting stuff.
*
* <p>The syntax highlighting stuff has to be here instead of in <code>insertUpdate</code> because
* <code>insertUpdate</code> is not called by the undo/redo actions, but this method is.
*
* @param e The change.
*/
protected void fireInsertUpdate(DocumentEvent e) {
/*
* Now that the text is actually inserted into the content and
* element structure, we can update our token elements and "last
* tokens on lines" structure.
*/
Element lineMap = getDefaultRootElement();
DocumentEvent.ElementChange change = e.getChange(lineMap);
Element[] added = change == null ? null : change.getChildrenAdded();
int numLines = lineMap.getElementCount();
int line = lineMap.getElementIndex(e.getOffset());
int previousLine = line - 1;
int previousTokenType = (previousLine > -1 ? lastTokensOnLines.get(previousLine) : Token.NULL);
// If entire lines were added...
if (added != null && added.length > 0) {
Element[] removed = change.getChildrenRemoved();
int numRemoved = removed != null ? removed.length : 0;
int endBefore = line + added.length - numRemoved;
// System.err.println("... adding lines: " + line + " - " + (endBefore-1));
// System.err.println("... ... added: " + added.length + ", removed:" + numRemoved);
for (int i = line; i < endBefore; i++) {
setSharedSegment(i); // Loads line i's text into s.
int tokenType = tokenMaker.getLastTokenTypeOnLine(s, previousTokenType);
lastTokensOnLines.add(i, tokenType);
// System.err.println("--------- lastTokensOnLines.size() == " +
// lastTokensOnLines.getSize());
previousTokenType = tokenType;
} // End of for (int i=line; i<endBefore; i++).
// Update last tokens for lines below until they stop changing.
updateLastTokensBelow(endBefore, numLines, previousTokenType);
} // End of if (added!=null && added.length>0).
// Otherwise, text was inserted on a single line...
else {
// Update last tokens for lines below until they stop changing.
updateLastTokensBelow(line, numLines, previousTokenType);
} // End of else.
// Let all listeners know about the insertion.
super.fireInsertUpdate(e);
}
/**
* This method is called AFTER the content has been inserted into the document and the element
* structure has been updated.
*
* <p>The syntax-highlighting updates need to be done here (as opposed to an override of <code>
* postRemoveUpdate</code>) as this method is called in response to undo/redo events, whereas
* <code>postRemoveUpdate</code> is not.
*
* <p>Now that the text is actually inserted into the content and element structure, we can update
* our token elements and "last tokens on lines" structure.
*
* @param chng The change that occurred.
* @see #removeUpdate
*/
protected void fireRemoveUpdate(DocumentEvent chng) {
Element lineMap = getDefaultRootElement();
int numLines = lineMap.getElementCount();
DocumentEvent.ElementChange change = chng.getChange(lineMap);
Element[] removed = change == null ? null : change.getChildrenRemoved();
// If entire lines were removed...
if (removed != null && removed.length > 0) {
int line = change.getIndex(); // First line entirely removed.
int previousLine = line - 1; // Line before that.
int previousTokenType =
(previousLine > -1 ? lastTokensOnLines.get(previousLine) : Token.NULL);
Element[] added = change.getChildrenAdded();
int numAdded = added == null ? 0 : added.length;
// Remove the cached last-token values for the removed lines.
int endBefore = line + removed.length - numAdded;
// System.err.println("... removing lines: " + line + " - " + (endBefore-1));
// System.err.println("... added: " + numAdded + ", removed: " + removed.length);
lastTokensOnLines.removeRange(
line, endBefore); // Removing values for lines [line-(endBefore-1)].
// System.err.println("--------- lastTokensOnLines.size() == " + lastTokensOnLines.getSize());
// Update last tokens for lines below until they've stopped changing.
updateLastTokensBelow(line, numLines, previousTokenType);
} // End of if (removed!=null && removed.size()>0).
// Otherwise, text was removed from just one line...
else {
int line = lineMap.getElementIndex(chng.getOffset());
if (line >= lastTokensOnLines.getSize())
return; // If we're editing the last line in a document...
int previousLine = line - 1;
int previousTokenType =
(previousLine > -1 ? lastTokensOnLines.get(previousLine) : Token.NULL);
// System.err.println("previousTokenType for line : " + previousLine + " is " +
// previousTokenType);
// Update last tokens for lines below until they've stopped changing.
updateLastTokensBelow(line, numLines, previousTokenType);
}
// Let all of our listeners know about the removal.
super.fireRemoveUpdate(chng);
}