private PsiElement performReplace(
@NotNull final PsiElement declaration, final IntroduceOperation operation) {
final PyExpression expression = operation.getInitializer();
final Project project = operation.getProject();
return new WriteCommandAction<PsiElement>(project, expression.getContainingFile()) {
protected void run(final Result<PsiElement> result) throws Throwable {
result.setResult(addDeclaration(operation, declaration));
PyExpression newExpression = createExpression(project, operation.getName(), declaration);
if (operation.isReplaceAll()) {
List<PsiElement> newOccurrences = new ArrayList<PsiElement>();
for (PsiElement occurrence : operation.getOccurrences()) {
final PsiElement replaced = replaceExpression(occurrence, newExpression, operation);
if (replaced != null) {
newOccurrences.add(replaced);
}
}
operation.setOccurrences(newOccurrences);
} else {
final PsiElement replaced = replaceExpression(expression, newExpression, operation);
operation.setOccurrences(Collections.singletonList(replaced));
}
postRefactoring(operation.getElement());
}
}.execute().getResultObject();
}
@Nullable
public PsiElement addDeclaration(IntroduceOperation operation, PsiElement declaration) {
final PsiElement expression = operation.getInitializer();
final Pair<PsiElement, TextRange> data =
expression.getUserData(PyReplaceExpressionUtil.SELECTION_BREAKS_AST_NODE);
if (data == null) {
return addDeclaration(expression, declaration, operation);
} else {
return addDeclaration(data.first, declaration, operation);
}
}
public PyAssignmentStatement createDeclaration(IntroduceOperation operation) {
final Project project = operation.getProject();
final PyExpression initializer = operation.getInitializer();
InitializerTextBuilder builder = new InitializerTextBuilder();
initializer.accept(builder);
String assignmentText = operation.getName() + " = " + builder.result();
PsiElement anchor =
operation.isReplaceAll()
? findAnchor(operation.getOccurrences())
: PsiTreeUtil.getParentOfType(initializer, PyStatement.class);
return createDeclaration(project, assignmentText, anchor);
}