public void postVisit(ASTNode node) {
if (!(node instanceof ParenthesizedExpression)) {
return;
}
ParenthesizedExpression parenthesizedExpression = (ParenthesizedExpression) node;
Expression expression = parenthesizedExpression.getExpression();
while (expression instanceof ParenthesizedExpression) {
expression = ((ParenthesizedExpression) expression).getExpression();
}
// if this is part of another expression, check for this and parent precedences
if (parenthesizedExpression.getParent() instanceof Expression) {
Expression parentExpression = (Expression) parenthesizedExpression.getParent();
int expressionPrecedence = getExpressionPrecedence(expression);
int parentPrecedence = getExpressionPrecedence(parentExpression);
if ((expressionPrecedence > parentPrecedence)
&& !(parenthesizedExpression.getParent() instanceof ParenthesizedExpression)) {
return;
}
// check for case when precedences for expression and parent are same
if ((expressionPrecedence == parentPrecedence)
&& (parentExpression instanceof InfixExpression)) {
// we have expr infix (expr infix expr) removing the parenthesis is equal to (expr infix
// expr) infix expr
InfixExpression parentInfix = (InfixExpression) parentExpression;
Operator parentOperator = parentInfix.getOperator();
if (parentInfix.getLeftOperand() == parenthesizedExpression) {
fNodes.add(node);
} else if (isAssoziative(parentOperator)) {
if (parentOperator == InfixExpression.Operator.PLUS) {
if (isStringExpression(parentInfix.getLeftOperand())
|| isStringExpression(parentInfix.getRightOperand())) {
return;
}
for (Iterator J = parentInfix.extendedOperands().iterator(); J.hasNext(); ) {
Expression operand = (Expression) J.next();
if (isStringExpression(operand)) {
return;
}
}
}
fNodes.add(node);
}
return;
} else if (expressionPrecedence == parentPrecedence
&& parentExpression instanceof ConditionalExpression) {
if (((ConditionalExpression) parentExpression).getElseExpression()
!= parenthesizedExpression) return;
}
}
fNodes.add(node);
}
/*
* @see ASTVisitor#visit(InfixExpression)
*/
public boolean visit(InfixExpression node) {
node.getLeftOperand().accept(this);
this.fBuffer.append(' '); // for cases like x= i - -1; or x= i++ + ++i;
this.fBuffer.append(node.getOperator().toString());
this.fBuffer.append(' ');
node.getRightOperand().accept(this);
final List extendedOperands = node.extendedOperands();
if (extendedOperands.size() != 0) {
this.fBuffer.append(' ');
for (Iterator it = extendedOperands.iterator(); it.hasNext(); ) {
this.fBuffer.append(node.getOperator().toString()).append(' ');
Expression e = (Expression) it.next();
e.accept(this);
}
}
return false;
}
/** @deprecated using deprecated code */
public void testInfixExpression() throws Exception {
IPackageFragment pack1 = this.sourceFolder.createPackageFragment("test1", false, null);
StringBuffer buf = new StringBuffer();
buf.append(" function foo() {\n");
buf.append(" i= 1 + 2;\n");
buf.append(" j= 1 + 2 + 3 + 4 + 5;\n");
buf.append(" k= 1 + 2 + 3 + 4 + 5;\n");
buf.append(" }\n");
IJavaScriptUnit cu = pack1.createCompilationUnit("E.js", buf.toString(), false, null);
JavaScriptUnit astRoot = createAST(cu);
ASTRewrite rewrite = ASTRewrite.create(astRoot.getAST());
AST ast = astRoot.getAST();
assertTrue("Parse errors", (astRoot.getFlags() & ASTNode.MALFORMED) == 0);
// TypeDeclaration type= findTypeDeclaration(astRoot, "E");
FunctionDeclaration methodDecl = findMethodDeclaration(astRoot, "foo");
Block block = methodDecl.getBody();
List statements = block.statements();
assertTrue("Number of statements not 3", statements.size() == 3);
{ // change left side & right side & operand
ExpressionStatement stmt = (ExpressionStatement) statements.get(0);
Assignment assignment = (Assignment) stmt.getExpression();
InfixExpression expr = (InfixExpression) assignment.getRightHandSide();
SimpleName leftOp = ast.newSimpleName("k");
rewrite.replace(expr.getLeftOperand(), leftOp, null);
SimpleName rightOp = ast.newSimpleName("j");
rewrite.replace(expr.getRightOperand(), rightOp, null);
// change operand
rewrite.set(expr, InfixExpression.OPERATOR_PROPERTY, InfixExpression.Operator.MINUS, null);
}
{ // remove an ext. operand, add one and replace one
ExpressionStatement stmt = (ExpressionStatement) statements.get(1);
Assignment assignment = (Assignment) stmt.getExpression();
InfixExpression expr = (InfixExpression) assignment.getRightHandSide();
List extendedOperands = expr.extendedOperands();
assertTrue("Number of extendedOperands not 3", extendedOperands.size() == 3);
rewrite.remove((ASTNode) extendedOperands.get(0), null);
SimpleName newOp1 = ast.newSimpleName("k");
rewrite.replace((ASTNode) extendedOperands.get(1), newOp1, null);
SimpleName newOp2 = ast.newSimpleName("n");
rewrite
.getListRewrite(expr, InfixExpression.EXTENDED_OPERANDS_PROPERTY)
.insertLast(newOp2, null);
}
{ // change operand
ExpressionStatement stmt = (ExpressionStatement) statements.get(2);
Assignment assignment = (Assignment) stmt.getExpression();
InfixExpression expr = (InfixExpression) assignment.getRightHandSide();
rewrite.set(expr, InfixExpression.OPERATOR_PROPERTY, InfixExpression.Operator.TIMES, null);
}
String preview = evaluateRewrite(cu, rewrite);
buf = new StringBuffer();
buf.append(" function foo() {\n");
buf.append(" i= k - j;\n");
buf.append(" j= 1 + 2 + k + 5 + n;\n");
buf.append(" k= 1 * 2 * 3 * 4 * 5;\n");
buf.append(" }\n");
assertEqualString(preview, buf.toString());
}