/*
* (non-Javadoc)
*
* @see org.eclipse.jface.bindings.keys.AbstractKeyFormatter#sortModifierKeys(int)
*/
protected int[] sortModifierKeys(final int modifierKeys) {
final IKeyLookup lookup = KeyLookupFactory.getDefault();
final int[] sortedKeys = new int[4];
int index = 0;
if (Util.isWindows()) {
if ((modifierKeys & lookup.getCtrl()) != 0) {
sortedKeys[index++] = lookup.getCtrl();
}
if ((modifierKeys & lookup.getAlt()) != 0) {
sortedKeys[index++] = lookup.getAlt();
}
if ((modifierKeys & lookup.getShift()) != 0) {
sortedKeys[index++] = lookup.getShift();
}
} else if (Util.isGtk() || Util.isMotif()) {
if ((modifierKeys & lookup.getShift()) != 0) {
sortedKeys[index++] = lookup.getShift();
}
if ((modifierKeys & lookup.getCtrl()) != 0) {
sortedKeys[index++] = lookup.getCtrl();
}
if ((modifierKeys & lookup.getAlt()) != 0) {
sortedKeys[index++] = lookup.getAlt();
}
} else if (Util.isMac()) {
if ((modifierKeys & lookup.getShift()) != 0) {
sortedKeys[index++] = lookup.getShift();
}
if ((modifierKeys & lookup.getCtrl()) != 0) {
sortedKeys[index++] = lookup.getCtrl();
}
if ((modifierKeys & lookup.getAlt()) != 0) {
sortedKeys[index++] = lookup.getAlt();
}
if ((modifierKeys & lookup.getCommand()) != 0) {
sortedKeys[index++] = lookup.getCommand();
}
}
return sortedKeys;
}
/**
* Returns the change that will be executed when the proposal is applied. This method calls {@link
* #createChange()} to compute the change.
*
* @return the change for this proposal, can be <code>null</code> in rare cases if creation of the
* change failed
* @throws CoreException when the change could not be created
*/
public final Change getChange() throws CoreException {
if (Util.isGtk()) {
// workaround for https://bugs.eclipse.org/bugs/show_bug.cgi?id=293995 :
// [Widgets] Deadlock while UI thread displaying/computing a change proposal and non-UI thread
// creating image
// Solution is to create the change outside a 'synchronized' block.
// Synchronization is achieved by polling fChange, using "fChange == COMPUTING_CHANGE" as
// barrier.
// Timeout of 10s for safety reasons (should not be reached).
long end = System.currentTimeMillis() + 10000;
do {
boolean computing;
synchronized (this) {
computing = fChange == COMPUTING_CHANGE;
}
if (computing) {
try {
Display display = Display.getCurrent();
if (display != null) {
while (!display.isDisposed() && display.readAndDispatch()) {
// empty the display loop
}
display.sleep();
} else {
Thread.sleep(100);
}
} catch (InterruptedException e) {
// continue
}
} else {
synchronized (this) {
if (fChange == COMPUTING_CHANGE) {
continue;
} else if (fChange != null) {
return fChange;
} else {
fChange = COMPUTING_CHANGE;
}
}
Change change = createChange();
synchronized (this) {
fChange = change;
}
return change;
}
} while (System.currentTimeMillis() < end);
synchronized (this) {
if (fChange == COMPUTING_CHANGE) {
return null; // failed
}
}
} else {
synchronized (this) {
if (fChange == null) {
fChange = createChange();
}
}
}
return fChange;
}