Java Code Examples for org.eclipse.e4.ui.model.application.ui.MElementContainer#getParent()

/**
 * The parent of the apart is typically a PartStack, but it could be something under an MCompositePart, so look up
 * @param apart the original selection
 * @return the MPart and PartStack
 */
protected PartAndStack getParentStack(MPart apart) {
	MPartSashContainerElement part = apart;
	MElementContainer<MUIElement> stack = apart.getParent();
	try {
		while (!((MPartSashContainerElement)stack instanceof MPartStack)) {
			if ((MPartSashContainerElement)stack instanceof MArea) {
				// some unexpected structure
				stack = null;
				part = apart;
				break;
			} else {
				part = (MPartSashContainerElement)stack;
				stack = stack.getParent();
			}
		}
	} catch (Exception e) {
		// Bail on anything unexpected - will just make the command a noop
		stack = null;
		part = apart;
	}
	return new PartAndStack((MPart)part, stack);
}
 

/**
 * Find the first element with which we should join
 * 
 * @param dragStack the stack to join
 * @return the target stack 
 */
@SuppressWarnings("unchecked")  // for safe cast to MElementContainer<MUIElement>
protected MElementContainer<MUIElement> getAdjacentElement(MElementContainer<MUIElement> dragStack, MPart part, boolean stackp) {
	MElementContainer<MUIElement> result = null;
	if (dragStack != null) {
		MElementContainer<MUIElement> psash = dragStack.getParent();
		if ((Object)psash instanceof MPartSashContainer) {
			List<MUIElement> children = psash.getChildren();
			int size = children.size(); 
			if (size > 1) {
				int index = children.indexOf(dragStack)+1;
				// use the next element, or previous if we're the last one
				result = (MElementContainer<MUIElement>)children.get((index == size) ? index - 2 : index);
				if (stackp) {
					result =  findTheStack(result);
				}
			}
		}
	}
	return result;
}
 

/**
 * @see com.mulgasoft.emacsplus.e4.commands.E4WindowCmd#getAdjacentElement(org.eclipse.e4.ui.model.application.ui.MElementContainer, boolean, org.eclipse.e4.ui.model.application.ui.basic.MPart)
 */
protected MElementContainer<MUIElement> getAdjacentElement(MElementContainer<MUIElement> dragStack, MPart part, boolean stackp) {
	MElementContainer<MUIElement> result = null;
	if (dragStack != null) {
		MElementContainer<MUIElement> psash = dragStack.getParent();
		MElementContainer<MUIElement> top = getTopElement(psash);
		if ((Object)top instanceof MTrimmedWindow) {
			// if we contain splits, remove them first
			if (top != psash) {
				super.joinAll(part);
			}
			Collection<MPart> parts = getParts(application.getChildren().get(0), EModelService.IN_SHARED_AREA);
			for (MPart p : parts) {
				List<MElementContainer<MUIElement>> all = getOrderedStacks(p);
				// if it has a PartStack, it sh/c/ould be an editor stack
				if (!all.isEmpty()) {
					result = all.get(0);
					break;
				};
			};
		}
	}
	return result;
}
 

/**
 * @param ele start from here
 * @return the most distant parent for the editor area
 */
protected MElementContainer<MUIElement> getTopElement(MElementContainer<MUIElement> ele) {
	MElementContainer<MUIElement> parent = ele;
	// get the outer container
	if (parent != null) {
		while (!((Object)parent instanceof MArea) && parent.getParent() != null) {
				parent = parent.getParent();
		}
	}
	return parent;
}