/**
* Skips the scope opened by <code>token</code>.
*
* @param scanner the scanner
* @param start the start position
* @param token the token
* @return the position after the scope or <code>JavaHeuristicScanner.NOT_FOUND</code>
*/
private static int skipScope(JavaHeuristicScanner scanner, int start, int token) {
int openToken = token;
int closeToken;
switch (token) {
case Symbols.TokenLPAREN:
closeToken = Symbols.TokenRPAREN;
break;
case Symbols.TokenLBRACKET:
closeToken = Symbols.TokenRBRACKET;
break;
case Symbols.TokenLBRACE:
closeToken = Symbols.TokenRBRACE;
break;
default:
Assert.isTrue(false);
return -1; // dummy
}
int depth = 1;
int p = start;
while (true) {
int tok = scanner.nextToken(p, JavaHeuristicScanner.UNBOUND);
p = scanner.getPosition();
if (tok == openToken) {
depth++;
} else if (tok == closeToken) {
depth--;
if (depth == 0) return p + 1;
} else if (tok == Symbols.TokenEOF) {
return JavaHeuristicScanner.NOT_FOUND;
}
}
}
private int getPeerPosition(IDocument document, DocumentCommand command) {
if (document.getLength() == 0) return 0;
/*
* Search for scope closers in the pasted text and find their opening peers
* in the document.
*/
Document pasted = new Document(command.text);
installJavaStuff(pasted);
int firstPeer = command.offset;
JavaHeuristicScanner pScanner = new JavaHeuristicScanner(pasted);
JavaHeuristicScanner dScanner = new JavaHeuristicScanner(document);
// add scope relevant after context to peer search
int afterToken =
dScanner.nextToken(command.offset + command.length, JavaHeuristicScanner.UNBOUND);
try {
switch (afterToken) {
case Symbols.TokenRBRACE:
pasted.replace(pasted.getLength(), 0, "}"); // $NON-NLS-1$
break;
case Symbols.TokenRPAREN:
pasted.replace(pasted.getLength(), 0, ")"); // $NON-NLS-1$
break;
case Symbols.TokenRBRACKET:
pasted.replace(pasted.getLength(), 0, "]"); // $NON-NLS-1$
break;
}
} catch (BadLocationException e) {
// cannot happen
Assert.isTrue(false);
}
int pPos = 0; // paste text position (increasing from 0)
int dPos = Math.max(0, command.offset - 1); // document position (decreasing from paste offset)
while (true) {
int token = pScanner.nextToken(pPos, JavaHeuristicScanner.UNBOUND);
pPos = pScanner.getPosition();
switch (token) {
case Symbols.TokenLBRACE:
case Symbols.TokenLBRACKET:
case Symbols.TokenLPAREN:
pPos = skipScope(pScanner, pPos, token);
if (pPos == JavaHeuristicScanner.NOT_FOUND) return firstPeer;
break; // closed scope -> keep searching
case Symbols.TokenRBRACE:
int peer = dScanner.findOpeningPeer(dPos, '{', '}');
dPos = peer - 1;
if (peer == JavaHeuristicScanner.NOT_FOUND) return firstPeer;
firstPeer = peer;
break; // keep searching
case Symbols.TokenRBRACKET:
peer = dScanner.findOpeningPeer(dPos, '[', ']');
dPos = peer - 1;
if (peer == JavaHeuristicScanner.NOT_FOUND) return firstPeer;
firstPeer = peer;
break; // keep searching
case Symbols.TokenRPAREN:
peer = dScanner.findOpeningPeer(dPos, '(', ')');
dPos = peer - 1;
if (peer == JavaHeuristicScanner.NOT_FOUND) return firstPeer;
firstPeer = peer;
break; // keep searching
case Symbols.TokenCASE:
case Symbols.TokenDEFAULT:
JavaIndenter indenter = new JavaIndenter(document, dScanner, fProject);
peer = indenter.findReferencePosition(dPos, false, false, false, true);
if (peer == JavaHeuristicScanner.NOT_FOUND) return firstPeer;
firstPeer = peer;
break; // keep searching
case Symbols.TokenEOF:
return firstPeer;
default:
// keep searching
}
}
}
private void smartIndentUponE(IDocument d, DocumentCommand c) {
if (c.offset < 4 || d.getLength() == 0) return;
try {
String content = d.get(c.offset - 3, 3);
if (content.equals("els")) { // $NON-NLS-1$
JavaHeuristicScanner scanner = new JavaHeuristicScanner(d);
int p = c.offset - 3;
// current line
int line = d.getLineOfOffset(p);
int lineOffset = d.getLineOffset(line);
// make sure we don't have any leading comments etc.
if (d.get(lineOffset, p - lineOffset).trim().length() != 0) return;
// line of last Java code
int pos = scanner.findNonWhitespaceBackward(p - 1, JavaHeuristicScanner.UNBOUND);
if (pos == -1) return;
int lastLine = d.getLineOfOffset(pos);
// only shift if the last java line is further up and is a braceless block candidate
if (lastLine < line) {
JavaIndenter indenter = new JavaIndenter(d, scanner, fProject);
int ref = indenter.findReferencePosition(p, true, false, false, false);
if (ref == JavaHeuristicScanner.NOT_FOUND) return;
int refLine = d.getLineOfOffset(ref);
String indent = getIndentOfLine(d, refLine);
if (indent != null) {
c.text = indent.toString() + "else"; // $NON-NLS-1$
c.length += c.offset - lineOffset;
c.offset = lineOffset;
}
}
return;
}
if (content.equals("cas")) { // $NON-NLS-1$
JavaHeuristicScanner scanner = new JavaHeuristicScanner(d);
int p = c.offset - 3;
// current line
int line = d.getLineOfOffset(p);
int lineOffset = d.getLineOffset(line);
// make sure we don't have any leading comments etc.
if (d.get(lineOffset, p - lineOffset).trim().length() != 0) return;
// line of last Java code
int pos = scanner.findNonWhitespaceBackward(p - 1, JavaHeuristicScanner.UNBOUND);
if (pos == -1) return;
int lastLine = d.getLineOfOffset(pos);
// only shift if the last java line is further up and is a braceless block candidate
if (lastLine < line) {
JavaIndenter indenter = new JavaIndenter(d, scanner, fProject);
int ref = indenter.findReferencePosition(p, false, false, false, true);
if (ref == JavaHeuristicScanner.NOT_FOUND) return;
int refLine = d.getLineOfOffset(ref);
int nextToken = scanner.nextToken(ref, JavaHeuristicScanner.UNBOUND);
String indent;
if (nextToken == Symbols.TokenCASE || nextToken == Symbols.TokenDEFAULT)
indent = getIndentOfLine(d, refLine);
else // at the brace of the switch
indent = indenter.computeIndentation(p).toString();
if (indent != null) {
c.text = indent.toString() + "case"; // $NON-NLS-1$
c.length += c.offset - lineOffset;
c.offset = lineOffset;
}
}
return;
}
} catch (BadLocationException e) {
JavaPlugin.log(e);
}
}
