private ITypeBinding[] computeTypeVariables(ITypeBinding[] bindings) {
Selection selection = getSelection();
Set<ITypeBinding> result = new HashSet<>();
// first remove all type variables that come from outside of the method
// or are covered by the selection
CompilationUnit compilationUnit = (CompilationUnit) fEnclosingBodyDeclaration.getRoot();
for (int i = 0; i < bindings.length; i++) {
ASTNode decl = compilationUnit.findDeclaringNode(bindings[i]);
if (decl == null
|| (!selection.covers(decl) && decl.getParent() instanceof MethodDeclaration))
result.add(bindings[i]);
}
// all all type variables which are needed since a local variable uses it
for (int i = 0; i < fArguments.length; i++) {
IVariableBinding arg = fArguments[i];
ITypeBinding type = arg.getType();
if (type != null && type.isTypeVariable()) {
ASTNode decl = compilationUnit.findDeclaringNode(type);
if (decl == null
|| (!selection.covers(decl) && decl.getParent() instanceof MethodDeclaration))
result.add(type);
}
}
return result.toArray(new ITypeBinding[result.size()]);
}
private IVariableBinding[] removeSelectedDeclarations(IVariableBinding[] bindings) {
List<IVariableBinding> result = new ArrayList<>(bindings.length);
Selection selection = getSelection();
for (int i = 0; i < bindings.length; i++) {
ASTNode decl =
((CompilationUnit) fEnclosingBodyDeclaration.getRoot()).findDeclaringNode(bindings[i]);
if (!selection.covers(decl)) result.add(bindings[i]);
}
return result.toArray(new IVariableBinding[result.size()]);
}