public static int findFieldAssignmentAnchor(
final PsiStatement[] statements,
final @Nullable Ref<Pair<PsiField, Boolean>> anchorRef,
final PsiClass targetClass,
final PsiParameter myParameter) {
int i = 0;
for (; i < statements.length; i++) {
PsiStatement psiStatement = statements[i];
if (psiStatement instanceof PsiExpressionStatement) {
PsiExpressionStatement expressionStatement = (PsiExpressionStatement) psiStatement;
PsiExpression expression = expressionStatement.getExpression();
if (expression instanceof PsiMethodCallExpression) {
PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression) expression;
String text = methodCallExpression.getMethodExpression().getText();
if (text.equals("super") || text.equals("this")) {
continue;
}
} else if (expression instanceof PsiAssignmentExpression) {
PsiAssignmentExpression assignmentExpression = (PsiAssignmentExpression) expression;
PsiExpression lExpression = assignmentExpression.getLExpression();
PsiExpression rExpression = assignmentExpression.getRExpression();
if (!(lExpression instanceof PsiReferenceExpression)) break;
if (!(rExpression instanceof PsiReferenceExpression)) break;
PsiReferenceExpression lReference = (PsiReferenceExpression) lExpression;
PsiReferenceExpression rReference = (PsiReferenceExpression) rExpression;
PsiElement lElement = lReference.resolve();
PsiElement rElement = rReference.resolve();
if (!(lElement instanceof PsiField)
|| ((PsiField) lElement).getContainingClass() != targetClass) break;
if (!(rElement instanceof PsiParameter)) break;
if (myParameter.getTextRange().getStartOffset()
< rElement.getTextRange().getStartOffset()) {
if (anchorRef != null) {
anchorRef.set(Pair.create((PsiField) lElement, Boolean.TRUE));
}
break;
}
if (anchorRef != null) {
anchorRef.set(Pair.create((PsiField) lElement, Boolean.FALSE));
}
continue;
}
}
break;
}
return i;
}
@Nullable
public static PsiParameter findParameterAtCursor(@NotNull PsiFile file, @NotNull Editor editor) {
final int offset = editor.getCaretModel().getOffset();
final PsiParameterList parameterList =
PsiTreeUtil.findElementOfClassAtOffset(file, offset, PsiParameterList.class, false);
if (parameterList == null) return null;
final PsiParameter[] parameters = parameterList.getParameters();
for (PsiParameter parameter : parameters) {
final TextRange range = parameter.getTextRange();
if (range.getStartOffset() <= offset && offset <= range.getEndOffset()) return parameter;
}
return null;
}
