@Override
public void visit(Function obj) {
preVisitVisitor(obj);
Expression[] args = obj.getArgs();
if (args != null) {
for (int i = 0; i < args.length; i++) {
visitNode(args[i]);
}
}
postVisitVisitor(obj);
}
private void modifyLanguageObject(
Object theObject, LanguageObject theNewValue, boolean retainSelection) {
CoreArgCheck.isNotNull(theNewValue); // should not be null when modifying
//
// set the parent object to reflect the change in it's child. parent's can't be undefined
//
Object newSelection = StructuredSelection.EMPTY;
LanguageObject parent = (LanguageObject) contentProvider.getParent(theObject);
Object newValue = theNewValue;
if (parent == null) {
// root language object
setLanguageObject((LanguageObject) newValue);
refresh(true);
newSelection = contentProvider.getRoot();
expandToLevel(newSelection, ALL_LEVELS);
if (newSelection instanceof Function) {
Function function = (Function) newSelection;
if (function.getArgs().length > 0) {
newSelection = contentProvider.getChildAt(0, function);
}
}
} else if (parent instanceof Function) {
// set the arg to new value in parent
int index = contentProvider.getChildIndex(theObject);
Expression[] args = ((Function) parent).getArgs();
args[index] = (Expression) newValue;
refresh(true);
expandToLevel(parent, ALL_LEVELS);
newSelection = contentProvider.getChildAt(index, parent);
if (!retainSelection) {
if (newSelection instanceof Function) {
// if function arg change to be a function, select first function arg
if (contentProvider.getChildCount(newSelection) > 0) {
newSelection = contentProvider.getChildAt(0, newSelection);
}
} else {
// select next sibling function arg if exists
if ((args.length - 1) > index) {
newSelection = contentProvider.getChildAt(index + 1, parent);
} else if (index > 0) {
newSelection = contentProvider.getChildAt(0, parent);
} else {
newSelection = contentProvider.getChildAt(index, parent);
}
}
}
} else if (parent instanceof Criteria) {
// theLangObj must also be a Criteria
// since NotCriteria aren't really edited in the editor (their contained criteria is). Need to
// save the state in order to restore it when modifying
Criteria newCriteria = (Criteria) newValue;
int index = contentProvider.getChildIndex(theObject);
if ((parent instanceof CompoundCriteria) || (parent instanceof NotCriteria)) {
CompoundCriteria compoundCriteria = null;
if (parent instanceof CompoundCriteria) {
compoundCriteria = (CompoundCriteria) parent;
} else {
compoundCriteria = (CompoundCriteria) ((NotCriteria) parent).getCriteria();
}
List criteriaCollection = compoundCriteria.getCriteria();
criteriaCollection.set(index, newCriteria);
refresh(true);
if (retainSelection) {
newSelection = criteriaCollection.get(index);
} else {
// set selection to next sibling criteria or to the first sibling
if ((criteriaCollection.size() - 1) > index) {
newSelection = criteriaCollection.get(index + 1);
} else if (index > 0) {
newSelection = criteriaCollection.get(0);
} else {
newSelection = contentProvider.getChildAt(index + 1, parent);
}
}
} else {
CoreArgCheck.isTrue(
false,
Util.getString(
PREFIX + "unexpectedType", // $NON-NLS-1$
new Object[] {
"modifyLanguageObject", //$NON-NLS-1$
parent.getClass().getName()
}));
}
expandToLevel(parent, ALL_LEVELS);
}
// select next node
setSelection(
(newSelection == null) ? StructuredSelection.EMPTY : new StructuredSelection(newSelection));
}
