@Override
public void switchPerspective(MPerspective perspective) {
Assert.isNotNull(perspective);
MWindow window = getWindow();
if (window != null && isInContainer(window, perspective)) {
perspective.getParent().setSelectedElement(perspective);
List<MPart> newPerspectiveParts =
modelService.findElements(perspective, null, MPart.class, null);
// if possible, keep the same active part across perspective switches
if (newPerspectiveParts.contains(activePart)
&& partActivationHistory.isValid(perspective, activePart)) {
MPart target = activePart;
IEclipseContext activeChild = activePart.getContext().getParent().getActiveChild();
if (activeChild != null) {
activeChild.deactivate();
}
if (target.getContext() != null
&& target.getContext().get(MPerspective.class) != null
&& target.getContext().get(MPerspective.class).getContext()
== perspective.getContext()) {
target.getContext().activateBranch();
} else {
perspective.getContext().activate();
}
modelService.bringToTop(target);
activate(target, true, false);
return;
}
MPart newActivePart = perspective.getContext().getActiveLeaf().get(MPart.class);
if (newActivePart == null) {
// whatever part was previously active can no longer be found, find another one
MPart candidate = partActivationHistory.getActivationCandidate(perspective);
if (candidate != null) {
modelService.bringToTop(candidate);
activate(candidate, true, false);
return;
}
}
// there seems to be no parts in this perspective, just activate it as is then
if (newActivePart == null) {
modelService.bringToTop(perspective);
perspective.getContext().activate();
} else {
if ((modelService.getElementLocation(newActivePart) & EModelService.IN_SHARED_AREA) != 0) {
if (newActivePart.getParent().getSelectedElement() != newActivePart) {
newActivePart = (MPart) newActivePart.getParent().getSelectedElement();
}
}
activate(newActivePart, true, false);
}
}
}
private void clearContext(MContext contextME) {
MContext ctxt = (MContext) contextME;
IEclipseContext lclContext = ctxt.getContext();
if (lclContext != null) {
IEclipseContext parentContext = lclContext.getParent();
IEclipseContext child = parentContext.getActiveChild();
if (child == lclContext) {
child.deactivate();
}
ctxt.setContext(null);
lclContext.dispose();
}
}
private void internalFixContext(MPart part, MUIElement oldSelectedElement) {
if (oldSelectedElement == null) {
return;
}
MContext parentPart = getParentWithContext(oldSelectedElement);
if (parentPart == null) {
// technically this shouldn't happen as there should be an MWindow somewhere
return;
}
IEclipseContext parentContext = parentPart.getContext();
IEclipseContext oldContext = getSubContext(oldSelectedElement);
Object child = parentContext.getActiveChild();
if (child == null || oldContext == null || child == oldContext) {
if (part == null) {
// TBD this should not be necessary; deactivation is missing somewhere
IEclipseContext currentActive = parentContext.getActiveChild();
if (currentActive != null) currentActive.deactivate();
} else part.getContext().activate();
}
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer#disposeWidget
* (org.eclipse.e4.ui.model.application.ui.MUIElement)
*/
@Override
public void disposeWidget(MUIElement element) {
MPlaceholder ph = (MPlaceholder) element;
MUIElement refElement = ph.getRef();
Control refCtrl = (Control) refElement.getWidget();
// Remove the element ref from the rendered list
List<MPlaceholder> refs = renderedMap.get(refElement);
refs.remove(ph);
IEclipseContext curContext = modelService.getContainingContext(ph);
if (refs.size() == 0) {
// Ensure that the image is the 'original' image for this
// part. See bug 347471 for details
if (refElement instanceof MPart) {
MPart thePart = (MPart) refElement;
String imageURI = thePart.getIconURI();
thePart.setIconURI(null);
thePart.setIconURI(imageURI);
}
renderingEngine.removeGui(refElement);
} else {
// Ensure that the dispose of the element reference doesn't cascade
// to dispose the 'real' part
if (refCtrl != null && !refCtrl.isDisposed()) {
MPlaceholder currentRef = refElement.getCurSharedRef();
if (currentRef == ph) {
// Find another *rendered* ref to pass the part on to
for (MPlaceholder aPH : refs) {
Composite phComp = (Composite) aPH.getWidget();
if (phComp == null || phComp.isDisposed()) continue;
// Reparent the context(s) (if any)
IEclipseContext newParentContext = modelService.getContainingContext(aPH);
List<MContext> allContexts =
modelService.findElements(refElement, null, MContext.class, null);
for (MContext ctxtElement : allContexts) {
IEclipseContext theContext = ctxtElement.getContext();
// this may be null if it hasn't been rendered yet
if (theContext != null) {
if (theContext.getParent() == curContext) {
// about to reparent the context, if we're
// the active child of the current parent,
// deactivate ourselves first
if (curContext.getActiveChild() == theContext) {
theContext.deactivate();
}
theContext.setParent(newParentContext);
}
}
}
// reset the 'cur' ref
refElement.setCurSharedRef(aPH);
// Reparent the widget
refCtrl.setParent(phComp);
break;
}
} else if (currentRef != null) {
Composite phComp = (Composite) currentRef.getWidget();
if (phComp == null || phComp.isDisposed()) {
super.disposeWidget(element);
return;
}
// Reparent the context(s) (if any)
IEclipseContext newParentContext = modelService.getContainingContext(currentRef);
List<MContext> allContexts =
modelService.findElements(refElement, null, MContext.class, null);
for (MContext ctxtElement : allContexts) {
IEclipseContext theContext = ctxtElement.getContext();
// this may be null if it hasn't been rendered yet
if (theContext != null && theContext.getParent() == curContext) {
// about to reparent the context, if we're the
// active child of the current parent, deactivate
// ourselves first
if (curContext.getActiveChild() == theContext) {
theContext.deactivate();
}
theContext.setParent(newParentContext);
}
}
}
}
}
super.disposeWidget(element);
}