@Override
public MPlaceholder createSharedPart(String id, boolean force) {
MWindow sharedWindow = getWindow();
// Do we already have the part to share?
MPart sharedPart = null;
// check for existing parts if necessary
if (!force) {
for (MUIElement element : sharedWindow.getSharedElements()) {
if (element.getElementId().equals(id)) {
sharedPart = (MPart) element;
break;
}
}
}
if (sharedPart == null) {
MPartDescriptor descriptor = modelService.getPartDescriptor(id);
sharedPart = createPart(descriptor);
if (sharedPart == null) {
return null;
}
// Replace the id to ensure that multi-instance parts work correctly
sharedPart.setElementId(id);
sharedWindow.getSharedElements().add(sharedPart);
}
return createSharedPart(sharedPart);
}
@Override
public void hostElement(
MUIElement element, MWindow hostWindow, Object uiContainer, IEclipseContext hostContext) {
// This is subtle; unless the element is hooked into the model it won't fire events
hostWindow.getSharedElements().add(element);
element.getTags().add(HOSTED_ELEMENT);
IPresentationEngine renderer = hostWindow.getContext().get(IPresentationEngine.class);
renderer.createGui(element, uiContainer, hostContext);
}
@Override
public boolean isHostedElement(MUIElement element, MWindow hostWindow) {
MUIElement curElement = element;
while (curElement != null && !curElement.getTags().contains(HOSTED_ELEMENT)) {
if (curElement.getCurSharedRef() != null) {
curElement = curElement.getCurSharedRef();
} else {
curElement = curElement.getParent();
}
}
if (curElement == null) {
return false;
}
return hostWindow.getSharedElements().contains(curElement);
}
@Override
public void handleEvent(Event event) {
final MUIElement changedElement = (MUIElement) event.getProperty(EventTags.ELEMENT);
if (!changedElement.getTags().contains(HOSTED_ELEMENT)) {
return;
}
if (changedElement.getWidget() != null) {
return;
}
EObject eObj = (EObject) changedElement;
if (!(eObj.eContainer() instanceof MWindow)) {
return;
}
MWindow hostingWindow = (MWindow) eObj.eContainer();
hostingWindow.getSharedElements().remove(changedElement);
changedElement.getTags().remove(HOSTED_ELEMENT);
}
@Override
public boolean isPartOrPlaceholderInPerspective(String elementId, MPerspective perspective) {
List<MPart> findElements = modelService.findElements(perspective, elementId, MPart.class, null);
if (!findElements.isEmpty()) {
MPart part = findElements.get(0);
// if that is a shared part, check the placeholders
if (workbenchWindow.getSharedElements().contains(part)) {
List<MPlaceholder> placeholders =
modelService.findElements(perspective, elementId, MPlaceholder.class, null);
for (MPlaceholder mPlaceholder : placeholders) {
if (mPlaceholder.isVisible() && mPlaceholder.isToBeRendered()) {
return true;
}
}
return false;
}
// not a shared part
return part.isVisible() && part.isToBeRendered();
}
return false;
}