@Override
public void visitJSBinaryExpression(@NotNull JSBinaryExpression expression) {
super.visitJSBinaryExpression(expression);
final IElementType sign = expression.getOperationSign();
if (!bitwiseTokens.contains(sign)) {
return;
}
final JSExpression rhs = expression.getROperand();
if (rhs == null) {
return;
}
final JSExpression lhs = expression.getLOperand();
final boolean isPointless;
if (JSTokenTypes.AND.equals(sign)) {
isPointless = andExpressionIsPointless(lhs, rhs);
} else if (JSTokenTypes.OR.equals(sign)) {
isPointless = orExpressionIsPointless(lhs, rhs);
} else if (JSTokenTypes.XOR.equals(sign)) {
isPointless = xorExpressionIsPointless(lhs, rhs);
} else if (JSTokenTypes.LTLT.equals(sign)
|| JSTokenTypes.GTGT.equals(sign)
|| JSTokenTypes.GTGTGT.equals(sign)) {
isPointless = shiftExpressionIsPointless(rhs);
} else {
isPointless = false;
}
if (isPointless) {
registerError(expression, expression);
}
}
@Override
public void invoke(
@NotNull Project project,
@NotNull PsiFile psiFile,
@Nullable("is null when called from inspection") Editor editor,
@NotNull PsiElement element,
@NotNull PsiElement end)
throws IncorrectOperationException {
// PsiElement element = descriptor.getPsiElement();
JSBinaryExpression binary = PsiTreeUtil.getParentOfType(element, JSBinaryExpression.class);
JSBinaryExpression binaryClone = (JSBinaryExpression) binary.copy();
binaryClone.getLOperand().replace(binary.getLOperand().getLastChild());
ASTNode negate = JSChangeUtil.createStatementFromText(project, "!(true)");
JSParenthesizedExpression paren =
PsiTreeUtil.getChildOfType(
negate.getPsi().getFirstChild(), JSParenthesizedExpression.class);
paren.getInnerExpression().replace(binaryClone);
binary.replace(negate.getPsi());
}
@Override
public void processIntention(@NotNull PsiElement element) throws IncorrectOperationException {
final JSBinaryExpression exp = (JSBinaryExpression) element;
final JSExpression lhs = exp.getLOperand();
final JSExpression rhs = exp.getROperand();
final IElementType sign = exp.getOperationSign();
final String negatedOperator = ComparisonUtils.getNegatedOperatorText(sign);
final String lhsText = lhs.getText();
assert (rhs != null);
JSElementFactory.replaceExpressionWithNegatedExpressionString(
exp, lhsText + negatedOperator + rhs.getText());
}
@Override
public boolean satisfiedBy(@NotNull PsiElement element) {
if (!(element instanceof JSAssignmentExpression)) {
return false;
}
if (ErrorUtil.containsError(element)) {
return false;
}
final JSAssignmentExpression assignment = (JSAssignmentExpression) element;
final IElementType tokenType = assignment.getOperationSign();
if (!JSTokenTypes.EQ.equals(tokenType)) {
return false;
}
JSExpression lhs = assignment.getLOperand();
final JSExpression rhs = assignment.getROperand();
if (lhs instanceof JSDefinitionExpression) {
lhs = ((JSDefinitionExpression) lhs).getExpression();
}
if (lhs == null || rhs == null) {
return false;
}
if (!(rhs instanceof JSBinaryExpression)) {
return false;
}
final JSBinaryExpression binaryRhs = (JSBinaryExpression) rhs;
final JSExpression rhsRhs = binaryRhs.getROperand();
final JSExpression rhsLhs = binaryRhs.getLOperand();
if (rhsRhs == null) {
return false;
}
final IElementType rhsTokenType = binaryRhs.getOperationSign();
if (JSTokenTypes.OROR.equals(rhsTokenType) || JSTokenTypes.ANDAND.equals(rhsTokenType)) {
return false;
}
if (SideEffectChecker.mayHaveSideEffects(lhs)) {
return false;
}
return EquivalenceChecker.expressionsAreEquivalent(lhs, rhsLhs);
}
String calculateReplacementExpression(JSExpression expression) {
final JSBinaryExpression exp = (JSBinaryExpression) expression;
final JSExpression lhs = exp.getLOperand();
final JSExpression rhs = exp.getROperand();
final IElementType tokenType = exp.getOperationSign();
assert rhs != null;
if (tokenType.equals(JSTokenTypes.AND)) {
if (isZero(lhs) || isAllOnes(rhs)) {
return lhs.getText();
} else {
return rhs.getText();
}
} else if (tokenType.equals(JSTokenTypes.OR)) {
if (isZero(lhs) || isAllOnes(rhs)) {
return rhs.getText();
} else {
return lhs.getText();
}
} else if (tokenType.equals(JSTokenTypes.XOR)) {
if (isAllOnes(lhs)) {
return '~' + rhs.getText();
} else if (isAllOnes(rhs)) {
return '~' + lhs.getText();
} else if (isZero(rhs)) {
return lhs.getText();
} else {
return rhs.getText();
}
} else if (tokenType.equals(JSTokenTypes.LTLT)
|| tokenType.equals(JSTokenTypes.GTGT)
|| tokenType.equals(JSTokenTypes.GTGTGT)) {
return lhs.getText();
} else {
return "";
}
}