/**
* Searches for element.
*
* @param unit Unit to search in.
* @param delta Delta.
* @return Found element.
*/
protected ICElementDelta findElement(ICElement unit, ICElementDelta delta) {
if (delta == null || unit == null) {
return null;
}
final ICElement element = delta.getElement();
if (unit.equals(element)) {
if (isPossibleStructuralChange(delta)) {
return delta;
}
return null;
}
if (element.getElementType() > ICElement.C_UNIT) {
return null;
}
final ICElementDelta[] children = delta.getAffectedChildren();
if (children == null || children.length == 0) {
return null;
}
for (ICElementDelta element2 : children) {
final ICElementDelta d = findElement(unit, element2);
if (d != null) {
return d;
}
}
return null;
}
/**
* Determines is structural change.
*
* @param cuDelta Delta to check.
* @return <b>true</b> if structural change.
*/
private boolean isPossibleStructuralChange(ICElementDelta cuDelta) {
boolean ret;
if (cuDelta.getKind() != ICElementDelta.CHANGED) {
ret = true; // add or remove
} else {
final int flags = cuDelta.getFlags();
if ((flags & ICElementDelta.F_CHILDREN) != 0) {
ret = true;
} else {
ret =
(flags & (ICElementDelta.F_CONTENT | ICElementDelta.F_FINE_GRAINED))
== ICElementDelta.F_CONTENT;
}
}
return ret;
}
private void processDelta(ICElementDelta delta, Set<IResource> handled) throws CoreException {
final int flags = delta.getFlags();
final boolean hasChildren = (flags & ICElementDelta.F_CHILDREN) != 0;
if (hasChildren) {
for (ICElementDelta child : delta.getAffectedChildren()) {
processDelta(child, handled);
}
}
final ICElement element = delta.getElement();
switch (element.getElementType()) {
case ICElement.C_UNIT:
ITranslationUnit tu = (ITranslationUnit) element;
if (!tu.isWorkingCopy()) {
handled.add(element.getResource());
switch (delta.getKind()) {
case ICElementDelta.CHANGED:
if ((flags & ICElementDelta.F_CONTENT) != 0) {
fChanged.add(tu);
}
break;
case ICElementDelta.ADDED:
fChanged.add(tu);
break;
case ICElementDelta.REMOVED:
fRemoved.add(tu);
break;
}
}
break;
case ICElement.C_CCONTAINER:
ICContainer folder = (ICContainer) element;
if (delta.getKind() == ICElementDelta.ADDED) {
handled.add(element.getResource());
collectSources(folder, fChanged);
}
break;
}
if (!sSuppressPotentialTUs) {
// Always look at the children of the resource delta (bug 343538)
final IResourceDelta[] rDeltas = delta.getResourceDeltas();
processResourceDelta(rDeltas, element, handled);
}
}
