public static void foldIfExpressionWithReturns(JetIfExpression ifExpression) {
Project project = ifExpression.getProject();
JetReturnExpression newReturnExpression = JetPsiFactory.createReturn(project, ifExpression);
JetIfExpression newIfExpression = (JetIfExpression) newReturnExpression.getReturnedExpression();
assertNotNull(newIfExpression);
//noinspection ConstantConditions
JetReturnExpression thenReturn = getFoldableBranchedReturn(newIfExpression.getThen());
JetReturnExpression elseReturn = getFoldableBranchedReturn(newIfExpression.getElse());
assertNotNull(thenReturn);
assertNotNull(elseReturn);
JetExpression thenExpr = thenReturn.getReturnedExpression();
JetExpression elseExpr = elseReturn.getReturnedExpression();
assertNotNull(thenExpr);
assertNotNull(elseExpr);
//noinspection ConstantConditions
thenReturn.replace(thenExpr);
//noinspection ConstantConditions
elseReturn.replace(elseExpr);
ifExpression.replace(newReturnExpression);
}
// Returns null if standalone closing brace is not found
private static BraceStatus checkForMovableClosingBrace(
@NotNull Editor editor, @NotNull PsiFile file, @NotNull MoveInfo info, boolean down) {
PsiElement closingBrace = getStandaloneClosingBrace(file, editor);
if (closingBrace == null) return BraceStatus.NOT_FOUND;
PsiElement blockLikeElement = closingBrace.getParent();
if (!(blockLikeElement instanceof JetBlockExpression)) return BraceStatus.NOT_MOVABLE;
PsiElement blockParent = blockLikeElement.getParent();
if (blockParent instanceof JetWhenEntry) return BraceStatus.NOT_FOUND;
if (PsiTreeUtil.instanceOf(blockParent, FUNCTIONLIKE_ELEMENT_CLASSES))
return BraceStatus.NOT_FOUND;
PsiElement enclosingExpression =
PsiTreeUtil.getParentOfType(blockLikeElement, JetExpression.class);
if (enclosingExpression instanceof JetDoWhileExpression) return BraceStatus.NOT_MOVABLE;
if (enclosingExpression instanceof JetIfExpression) {
JetIfExpression ifExpression = (JetIfExpression) enclosingExpression;
if (blockLikeElement == ifExpression.getThen() && ifExpression.getElse() != null)
return BraceStatus.NOT_MOVABLE;
}
return down
? checkForMovableDownClosingBrace(closingBrace, blockLikeElement, editor, info)
: checkForMovableUpClosingBrace(closingBrace, blockLikeElement, editor, info);
}
public static void foldIfExpressionWithAsymmetricReturns(JetIfExpression ifExpression) {
Project project = ifExpression.getProject();
JetExpression condition = ifExpression.getCondition();
JetExpression thenRoot = ifExpression.getThen();
JetExpression elseRoot =
(JetExpression) JetPsiUtil.skipTrailingWhitespacesAndComments(ifExpression);
assertNotNull(condition);
assertNotNull(thenRoot);
assertNotNull(elseRoot);
//noinspection ConstantConditions
JetIfExpression newIfExpression =
JetPsiFactory.createIf(project, condition, thenRoot, elseRoot);
JetReturnExpression newReturnExpression = JetPsiFactory.createReturn(project, newIfExpression);
newIfExpression = (JetIfExpression) newReturnExpression.getReturnedExpression();
assertNotNull(newIfExpression);
//noinspection ConstantConditions
JetReturnExpression thenReturn = getFoldableBranchedReturn(newIfExpression.getThen());
JetReturnExpression elseReturn = getFoldableBranchedReturn(newIfExpression.getElse());
assertNotNull(thenReturn);
assertNotNull(elseReturn);
JetExpression thenExpr = thenReturn.getReturnedExpression();
JetExpression elseExpr = elseReturn.getReturnedExpression();
assertNotNull(thenExpr);
assertNotNull(elseExpr);
//noinspection ConstantConditions
thenReturn.replace(thenExpr);
//noinspection ConstantConditions
elseReturn.replace(elseExpr);
elseRoot.delete();
ifExpression.replace(newReturnExpression);
}
private static boolean checkFoldableIfExpressionWithAssignments(JetIfExpression ifExpression) {
JetExpression thenBranch = ifExpression.getThen();
JetExpression elseBranch = ifExpression.getElse();
JetBinaryExpression thenAssignment = getFoldableBranchedAssignment(thenBranch);
JetBinaryExpression elseAssignment = getFoldableBranchedAssignment(elseBranch);
if (thenAssignment == null || elseAssignment == null) return false;
return checkAssignmentsMatch(thenAssignment, elseAssignment);
}
private static boolean checkFoldableIfExpressionWithAsymmetricReturns(
JetIfExpression ifExpression) {
if (getFoldableBranchedReturn(ifExpression.getThen()) == null
|| ifExpression.getElse() != null) {
return false;
}
PsiElement nextElement = JetPsiUtil.skipTrailingWhitespacesAndComments(ifExpression);
return (nextElement instanceof JetExpression)
&& getFoldableBranchedReturn((JetExpression) nextElement) != null;
}
public static void foldIfExpressionWithAssignments(JetIfExpression ifExpression) {
Project project = ifExpression.getProject();
JetBinaryExpression thenAssignment = getFoldableBranchedAssignment(ifExpression.getThen());
assertNotNull(thenAssignment);
String op = thenAssignment.getOperationReference().getText();
JetSimpleNameExpression lhs = (JetSimpleNameExpression) thenAssignment.getLeft();
JetBinaryExpression assignment =
JetPsiFactory.createBinaryExpression(project, lhs, op, ifExpression);
JetIfExpression newIfExpression = (JetIfExpression) assignment.getRight();
assertNotNull(newIfExpression);
//noinspection ConstantConditions
thenAssignment = getFoldableBranchedAssignment(newIfExpression.getThen());
JetBinaryExpression elseAssignment = getFoldableBranchedAssignment(newIfExpression.getElse());
assertNotNull(thenAssignment);
assertNotNull(elseAssignment);
JetExpression thenRhs = thenAssignment.getRight();
JetExpression elseRhs = elseAssignment.getRight();
assertNotNull(thenRhs);
assertNotNull(elseRhs);
//noinspection ConstantConditions
thenAssignment.replace(thenRhs);
//noinspection ConstantConditions
elseAssignment.replace(elseRhs);
ifExpression.replace(assignment);
}
private static boolean checkFoldableIfExpressionWithReturns(JetIfExpression ifExpression) {
return getFoldableBranchedReturn(ifExpression.getThen()) != null
&& getFoldableBranchedReturn(ifExpression.getElse()) != null;
}