private ASTNode parseCondition(IfContext context) throws IfStatementError {
if (context.isEOF()) {
throw new IfStatementError(
Messages.TclIfProcessor_missingCondition, context.start(), context.end());
}
ASTNode node = context.get();
if (node instanceof TclBlockExpression) {
TclBlockExpression bl = (TclBlockExpression) node;
List parseBlock = bl.parseBlockSimple(false);
ASTListNode list = new ASTListNode(bl.sourceStart() + 1, bl.sourceEnd() - 1);
for (int j = 0; j < parseBlock.size(); j++) {
Object st = parseBlock.get(j);
if (st instanceof TclStatement) {
List expressions = ((TclStatement) st).getExpressions();
for (int k = 0; k < expressions.size(); k++) {
ASTNode expr = (ASTNode) expressions.get(k);
list.addNode(expr);
}
}
}
return list;
} else if (node instanceof SimpleReference) {
return node;
} else if (node instanceof TclAdvancedExecuteExpression) {
TclAdvancedExecuteExpression ex = (TclAdvancedExecuteExpression) node;
List childs = ex.getChilds();
return new ASTListNode(node.sourceStart(), node.sourceEnd(), childs);
} else if (node instanceof TclExecuteExpression) {
return node;
} else if (node instanceof Block) {
return node;
}
throw new IfStatementError(Messages.TclIfProcessor_incorrectCondition, node);
}
private Statement parseBranch(IfContext context, boolean wrapAsBlock, String message)
throws IfStatementError {
final ASTNode node = context.get();
if (node instanceof TclBlockExpression) {
final Block block = new Block(node.sourceStart(), node.sourceEnd());
parseBlock(context.parser, block, (TclBlockExpression) node);
return block;
} else if (node instanceof SimpleReference) {
final Block block = new Block(node.sourceStart(), node.sourceEnd());
block.addStatement(node);
return block;
} else if (node instanceof TclStatement) {
if (wrapAsBlock) {
final Block block = new Block(node.sourceStart(), node.sourceEnd());
block.addStatement(node);
return block;
} else {
return (TclStatement) node;
}
} else if (node instanceof TclExecuteExpression) {
if (wrapAsBlock) {
final Block block = new Block(node.sourceStart(), node.sourceEnd());
block.addStatement(node);
return block;
} else {
return (TclExecuteExpression) node;
}
} else if (node instanceof Block) {
return (Block) node;
} else {
throw new IfStatementError(message, context.start(), context.end());
}
}
private void parseIf(IfContext context, IfStatement ifStatement) throws IfStatementError {
ifStatement.acceptCondition(parseCondition(context));
if (context.isEOF()) {
throw new IfStatementError(
Messages.TclIfProcessor_missingThenBlock, context.start(), context.end());
}
if (checkKeyword(context, THEN)) {
if (context.isEOF()) {
throw new IfStatementError(
Messages.TclIfProcessor_missingThenBlock, context.start(), context.end());
}
}
ifStatement.acceptThen(parseBranch(context, true, Messages.TclIfProcessor_incorrectThenBlock));
if (!context.isEOF()) {
if (checkKeyword(context, ELSEIF)) {
final ASTNode elseIfKeyword = context.get(context.index - 1);
final IfStatement nestedIf = new IfStatement(elseIfKeyword.sourceStart(), context.end());
parseIf(context, nestedIf);
ifStatement.acceptElse(nestedIf);
} else {
if (checkKeyword(context, ELSE)) {
if (context.isEOF()) {
throw new IfStatementError(
Messages.TclIfProcessor_incorrectElse, context.start(), context.end());
}
}
ifStatement.acceptElse(
parseBranch(context, false, Messages.TclIfProcessor_incorrectElseBlock));
}
}
}
/**
* @param exprs
* @param index
* @param keyword
* @return
*/
private boolean checkKeyword(IfContext context, String keyword) {
final ASTNode node = context.get(context.index);
if (node instanceof SimpleReference) {
final SimpleReference ref = (SimpleReference) node;
if (keyword.equals(ref.getName())) {
++context.index;
return true;
}
}
return false;
}
public ASTNode process(TclStatement statement, ITclParser parser, ASTNode parent) {
final IfContext context = new IfContext(parser, statement);
IfStatement ifStatement = new IfStatement(context.start(), context.end());
addToParent(parent, ifStatement);
try {
parseIf(context, ifStatement);
if (!context.isEOF()) {
final ASTNode extraBegin = context.get(context.index);
final ASTNode extraEnd = context.get(context.size() - 1);
report(
parser,
Messages.TclIfProcessor_unexpectedStatements,
extraBegin.sourceStart(),
extraEnd.sourceEnd(),
ProblemSeverities.Error);
}
} catch (IfStatementError e) {
// if (DLTKCore.DEBUG) {
// e.printStackTrace();
// }
report(parser, e.getMessage(), e.start, e.end, ProblemSeverities.Error);
}
return ifStatement;
}