@NotNull
private static PyExpression invertExpression(@NotNull final PsiElement expression) {
final PyElementGenerator elementGenerator =
PyElementGenerator.getInstance(expression.getProject());
if (expression instanceof PyBoolLiteralExpression) {
final String value =
((PyBoolLiteralExpression) expression).getValue() ? PyNames.FALSE : PyNames.TRUE;
return elementGenerator.createExpressionFromText(LanguageLevel.forElement(expression), value);
}
if (expression instanceof PyReferenceExpression
&& (PyNames.FALSE.equals(expression.getText())
|| PyNames.TRUE.equals(expression.getText()))) {
final String value = PyNames.TRUE.equals(expression.getText()) ? PyNames.FALSE : PyNames.TRUE;
return elementGenerator.createExpressionFromText(LanguageLevel.forElement(expression), value);
} else if (expression instanceof PyPrefixExpression) {
if (((PyPrefixExpression) expression).getOperator() == PyTokenTypes.NOT_KEYWORD) {
final PyExpression operand = ((PyPrefixExpression) expression).getOperand();
if (operand != null)
return elementGenerator.createExpressionFromText(
LanguageLevel.forElement(expression), operand.getText());
}
}
return elementGenerator.createExpressionFromText(
LanguageLevel.forElement(expression), "not " + expression.getText());
}
@Override
public boolean isAvailableOnElement(@NotNull PsiElement element) {
final VirtualFile virtualFile = PsiUtilCore.getVirtualFile(element);
if (virtualFile != null
&& ProjectRootManager.getInstance(element.getProject())
.getFileIndex()
.isInLibraryClasses(virtualFile)) return false;
if (element instanceof PyTargetExpression) {
final PyAssignmentStatement assignmentStatement =
PsiTreeUtil.getParentOfType(element, PyAssignmentStatement.class);
if (assignmentStatement != null) {
final PyExpression assignedValue = assignmentStatement.getAssignedValue();
if (assignedValue == null) return false;
final String name = assignedValue.getText();
return name != null && (PyNames.TRUE.equals(name) || PyNames.FALSE.equals(name));
}
}
if (element instanceof PyNamedParameter) {
final PyExpression defaultValue = ((PyNamedParameter) element).getDefaultValue();
if (defaultValue instanceof PyBoolLiteralExpression) return true;
}
return element.getParent() instanceof PyBoolLiteralExpression;
}
@Nullable
public static PyType getTypeFromTarget(
@NotNull final PsiElement target,
final TypeEvalContext context,
PyReferenceExpression anchor) {
if (!(target
instanceof PyTargetExpression)) { // PyTargetExpression will ask about its type itself
final PyType pyType = getReferenceTypeFromProviders(target, context, anchor);
if (pyType != null) {
return pyType;
}
}
if (target instanceof PyTargetExpression) {
final String name = ((PyTargetExpression) target).getName();
if (PyNames.NONE.equals(name)) {
return PyNoneType.INSTANCE;
}
if (PyNames.TRUE.equals(name) || PyNames.FALSE.equals(name)) {
return PyBuiltinCache.getInstance(target).getBoolType();
}
}
if (target instanceof PyFile) {
return new PyModuleType((PyFile) target);
}
if (target instanceof PyImportedModule) {
return new PyImportedModuleType((PyImportedModule) target);
}
if ((target instanceof PyTargetExpression || target instanceof PyNamedParameter)
&& anchor != null
&& context.allowDataFlow(anchor)) {
final ScopeOwner scopeOwner = PsiTreeUtil.getStubOrPsiParentOfType(anchor, ScopeOwner.class);
if (scopeOwner != null
&& scopeOwner == PsiTreeUtil.getStubOrPsiParentOfType(target, ScopeOwner.class)) {
final String name = ((PyElement) target).getName();
if (name != null) {
final PyType type = getTypeByControlFlow(name, context, anchor, scopeOwner);
if (type != null) {
return type;
}
}
}
}
if (target instanceof PyFunction) {
final PyDecoratorList decoratorList = ((PyFunction) target).getDecoratorList();
if (decoratorList != null) {
final PyDecorator propertyDecorator = decoratorList.findDecorator(PyNames.PROPERTY);
if (propertyDecorator != null) {
return PyBuiltinCache.getInstance(target).getObjectType(PyNames.PROPERTY);
}
for (PyDecorator decorator : decoratorList.getDecorators()) {
final QualifiedName qName = decorator.getQualifiedName();
if (qName != null
&& (qName.endsWith(PyNames.SETTER)
|| qName.endsWith(PyNames.DELETER)
|| qName.endsWith(PyNames.GETTER))) {
return PyBuiltinCache.getInstance(target).getObjectType(PyNames.PROPERTY);
}
}
}
}
if (target instanceof PyTypedElement) {
return context.getType((PyTypedElement) target);
}
if (target instanceof PsiDirectory) {
final PsiDirectory dir = (PsiDirectory) target;
PsiFile file = dir.findFile(PyNames.INIT_DOT_PY);
if (file != null) {
return getTypeFromTarget(file, context, anchor);
}
if (PyUtil.isPackage(dir, anchor)) {
final PsiFile containingFile = anchor.getContainingFile();
if (containingFile instanceof PyFile) {
final QualifiedName qualifiedName = QualifiedNameFinder.findShortestImportableQName(dir);
if (qualifiedName != null) {
final PyImportedModule module =
new PyImportedModule(null, (PyFile) containingFile, qualifiedName);
return new PyImportedModuleType(module);
}
}
}
}
return null;
}