/**
* Returns a collection of all the parents of this element up to (but not including) the root of
* this tree in bottom-up order. If the given element is not a descendant of the root of this
* tree, <code>null</code> is returned.
*/
private ArrayList getAncestors(IJavaScriptElement element) {
IJavaScriptElement parent = element.getParent();
if (parent == null) {
return null;
}
ArrayList parents = new ArrayList();
while (!parent.equals(this.changedElement)) {
parents.add(parent);
parent = parent.getParent();
if (parent == null) {
return null;
}
}
parents.trimToSize();
return parents;
}
/**
* Processes a delta recursively. When more than two children are affected the tree is fully
* refreshed starting at this node. The delta is processed in the current thread but the viewer
* updates are posted to the UI thread.
*/
protected void processDelta(IJavaScriptElementDelta delta) throws JavaScriptModelException {
int kind = delta.getKind();
int flags = delta.getFlags();
final IJavaScriptElement element = delta.getElement();
final boolean isElementValidForView = fBrowsingPart.isValidElement(element);
if (!getProvideWorkingCopy()
&& element instanceof IJavaScriptUnit
&& ((IJavaScriptUnit) element).isWorkingCopy()) return;
if (element != null
&& element.getElementType() == IJavaScriptElement.JAVASCRIPT_UNIT
&& !isOnClassPath((IJavaScriptUnit) element)) return;
// handle open and closing of a solution or project
if (((flags & IJavaScriptElementDelta.F_CLOSED) != 0)
|| ((flags & IJavaScriptElementDelta.F_OPENED) != 0)) {
postRefresh(null);
return;
}
if (kind == IJavaScriptElementDelta.REMOVED) {
Object parent = internalGetParent(element);
if (isElementValidForView) {
if (element instanceof IClassFile) {
postRemove(((IClassFile) element).getType());
} else if (element instanceof IJavaScriptUnit
&& !((IJavaScriptUnit) element).isWorkingCopy()) {
postRefresh(null);
} else if (element instanceof IJavaScriptUnit
&& ((IJavaScriptUnit) element).isWorkingCopy()) {
if (getProvideWorkingCopy()) postRefresh(null);
} else if (parent instanceof IJavaScriptUnit
&& getProvideWorkingCopy()
&& !((IJavaScriptUnit) parent).isWorkingCopy()) {
if (element instanceof IJavaScriptUnit && ((IJavaScriptUnit) element).isWorkingCopy()) {
// working copy removed from system - refresh
postRefresh(null);
}
} else if (element instanceof IJavaScriptUnit
&& ((IJavaScriptUnit) element).isWorkingCopy()
&& parent != null
&& parent.equals(fInput))
// closed editor - removing working copy
postRefresh(null);
else postRemove(element);
}
if (fBrowsingPart.isAncestorOf(element, fInput)) {
if (element instanceof IJavaScriptUnit && ((IJavaScriptUnit) element).isWorkingCopy()) {
postAdjustInputAndSetSelection(((IJavaScriptElement) fInput).getPrimaryElement());
} else postAdjustInputAndSetSelection(null);
}
if (fInput != null && fInput.equals(element)) postRefresh(null);
if (parent instanceof IPackageFragment && fBrowsingPart.isValidElement(parent)) {
// refresh if package gets empty (might be filtered)
if (isPackageFragmentEmpty((IPackageFragment) parent)
&& fViewer.testFindItem(parent) != null) postRefresh(null);
}
return;
}
if (kind == IJavaScriptElementDelta.ADDED
&& delta.getMovedFromElement() != null
&& element instanceof IJavaScriptUnit) return;
if (kind == IJavaScriptElementDelta.ADDED) {
if (isElementValidForView) {
Object parent = internalGetParent(element);
if (element instanceof IClassFile) {
postAdd(parent, ((IClassFile) element).getType());
} else if (element instanceof IJavaScriptUnit
&& !((IJavaScriptUnit) element).isWorkingCopy()) {
postAdd(parent, ((IJavaScriptUnit) element).getTypes());
} else if (parent instanceof IJavaScriptUnit
&& getProvideWorkingCopy()
&& !((IJavaScriptUnit) parent).isWorkingCopy()) {
// do nothing
} else if (element instanceof IJavaScriptUnit
&& ((IJavaScriptUnit) element).isWorkingCopy()) {
// new working copy comes to live
postRefresh(null);
} else postAdd(parent, element);
} else if (fInput == null) {
IJavaScriptElement newInput = fBrowsingPart.findInputForJavaElement(element);
if (newInput != null) postAdjustInputAndSetSelection(element);
} else if (element instanceof IType && fBrowsingPart.isValidInput(element)) {
IJavaScriptElement cu1 = element.getAncestor(IJavaScriptElement.JAVASCRIPT_UNIT);
IJavaScriptElement cu2 =
((IJavaScriptElement) fInput).getAncestor(IJavaScriptElement.JAVASCRIPT_UNIT);
if (cu1 != null && cu2 != null && cu1.equals(cu2)) postAdjustInputAndSetSelection(element);
}
return;
}
if (kind == IJavaScriptElementDelta.CHANGED) {
if (fInput != null
&& fInput.equals(element)
&& (flags & IJavaScriptElementDelta.F_CHILDREN) != 0
&& (flags & IJavaScriptElementDelta.F_FINE_GRAINED) != 0) {
postRefresh(null, true);
return;
}
if (isElementValidForView && (flags & IJavaScriptElementDelta.F_MODIFIERS) != 0) {
postUpdateIcon(element);
}
}
if (isClassPathChange(delta))
// throw the towel and do a full refresh
postRefresh(null);
if ((flags & IJavaScriptElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0
&& fInput instanceof IJavaScriptElement) {
IPackageFragmentRoot pkgRoot = (IPackageFragmentRoot) element;
IJavaScriptElement inputsParent =
((IJavaScriptElement) fInput).getAncestor(IJavaScriptElement.PACKAGE_FRAGMENT_ROOT);
if (pkgRoot.equals(inputsParent)) postRefresh(null);
}
// the source attachment of a JAR has changed
if (element instanceof IPackageFragmentRoot
&& (((flags & IJavaScriptElementDelta.F_SOURCEATTACHED) != 0
|| ((flags & IJavaScriptElementDelta.F_SOURCEDETACHED)) != 0))) postUpdateIcon(element);
IJavaScriptElementDelta[] affectedChildren = delta.getAffectedChildren();
if (affectedChildren.length > 1) {
// a package fragment might become non empty refresh from the parent
if (element instanceof IPackageFragment) {
IJavaScriptElement parent = (IJavaScriptElement) internalGetParent(element);
// avoid posting a refresh to an invisible parent
if (element.equals(fInput)) {
postRefresh(element);
} else {
postRefresh(parent);
}
}
// more than one child changed, refresh from here downwards
if (element instanceof IPackageFragmentRoot && isElementValidForView) {
postRefresh(skipProjectPackageFragmentRoot((IPackageFragmentRoot) element));
return;
}
}
for (int i = 0; i < affectedChildren.length; i++) {
processDelta(affectedChildren[i]);
}
}
/** Returns whether the two java elements are equals and have the same parent. */
protected boolean equalsAndSameParent(IJavaScriptElement e1, IJavaScriptElement e2) {
IJavaScriptElement parent1;
return e1.equals(e2) && ((parent1 = e1.getParent()) != null) && parent1.equals(e2.getParent());
}