protected static String getConcernNameWithMnemonic(
Concern concern, Set<Character> mnemonicsAlreadyUsed) {
String concernName = concern.getDisplayName();
assert concernName != null && !concernName.isEmpty();
if (concernName.indexOf('&') >= 0) return concernName;
char[] buf = concernName.toCharArray();
char[] newBuf = new char[buf.length + 1]; // Add one for the ampersand
for (int i = 0, newIndex = 0; i < buf.length; ++i, ++newIndex) {
char c = buf[i];
if ((newIndex == i)
&& Character.isLetter(c)
&& mnemonicsAlreadyUsed.add(c)) // Returns true if mnemonic doesn't exist
{
newBuf[newIndex++] = '&';
}
newBuf[newIndex] = c;
}
return new String(newBuf);
}
protected static boolean isLinked(
Concern concern, List<IJavaElement> javaElements, EdgeKind concernComponentRelation) {
// See if any of the selected elements are already
// linked to the concern
for (IJavaElement javaElement : javaElements) {
if (concern.isLinked(javaElement, concernComponentRelation)) {
return true;
}
}
return false;
}
/** Builds the cascading 'Link' menu */
private void fillMenuRecursive(
Menu parent,
List<Concern> concerns,
List<IJavaElement> selectedJavaElements,
EdgeKind concernComponentRelation) {
Set<Character> mnemonicsUsed = new HashSet<Character>();
for (Concern concern : concerns) {
// See if any of the selected elements are already
// linked to the concern
getSelectedJavaElements(
aJavaEditor, FLATTT.tableView.getViewer().getSelection(), selectedJavaElements);
boolean isLinked = isLinked(concern, selectedJavaElements, concernComponentRelation);
// For the 'Unlink' menu, only show linked concerns
if (isLinked) {
MenuItem lMenuItem = new MenuItem(parent, SWT.PUSH);
lMenuItem.setData(concern);
lMenuItem.setText(getConcernNameWithMnemonic(concern, mnemonicsUsed));
lMenuItem.addSelectionListener(clickListener);
}
List<Concern> children = concern.getChildren();
if (!children.isEmpty()) {
// The 'Unlink' menu is flat, so we pass in the same
// parent menu
fillMenuRecursive(parent, children, selectedJavaElements, concernComponentRelation);
}
children = null; // Helps GC
/*
List<Concern> children = concern.getChildren();
MenuItem lMenuItem = null;
Menu childMenu = null;
// For the 'Link' menu, create menu items for all concerns,
// regardless of whether they are linked.
// See if we already created the item
for(MenuItem menuItem : parent.getItems())
{
Object data = menuItem.getData();
if (data != null &&
data.equals(concern))
{
lMenuItem = menuItem;
childMenu = lMenuItem.getMenu();
break;
}
}
// Lazily create the concern menu item
if (lMenuItem == null)
{
if (!children.isEmpty())
{
lMenuItem = new MenuItem(parent, SWT.CASCADE);
}
else
{
lMenuItem = new MenuItem(parent, SWT.PUSH);
// Can't click on cascading menu
lMenuItem.addSelectionListener(clickListener);
}
lMenuItem.setData(concern);
lMenuItem.setText(getConcernNameWithMnemonic(concern, mnemonicsUsed));
}
lMenuItem.setEnabled(!children.isEmpty() || isLinked);
if (!children.isEmpty())
{
// The 'Link' menu is hierarchical, so we create
// a cascading menu for the children
assert lMenuItem != null;
if (childMenu == null)
{
childMenu = new Menu(lMenuItem);
}
fillMenuRecursive(childMenu, children, selectedJavaElements,
concernComponentRelation);
lMenuItem.setMenu(childMenu);
}
children = null; // Helps GC*/
}
mnemonicsUsed = null; // Helps GC
}