/**
* Check if descendant is child of parent or same as parent.
*
* @param descendant
* @param root
* @return
*/
public static boolean isSelfOrParent(VFSContainer descendant, VFSContainer parent) {
if (parent.isSame(descendant)) return true;
VFSContainer parentContainer = descendant.getParentContainer();
if (parentContainer != null && parentContainer.isSame(parent)) return true;
return false;
}
/**
* Check if descendant is indeed a descendant of root..
*
* @param parent
* @param child
* @return
*/
public static boolean isContainerDescendantOrSelf(VFSContainer descendant, VFSContainer root) {
if (root.isSame(descendant)) return true;
VFSContainer parentContainer = descendant.getParentContainer();
while (parentContainer != null) {
if (parentContainer.isSame(root)) return true;
parentContainer = parentContainer.getParentContainer();
}
return false;
}
/**
* Get the path as string of the given item relative to the root container and the relative base
* path
*
* @param item the item for which the relative path should be returned
* @param rootContainer The root container for which the relative path should be calculated
* @param relativeBasePath when NULL, the path will be calculated relative to the rootContainer;
* when NOT NULL, the relativeBasePath must represent a relative path within the root
* container that serves as the base. In this case, the calculated relative item path will
* start from this relativeBasePath
* @return
*/
public static String getRelativeItemPath(
VFSItem item, VFSContainer rootContainer, String relativeBasePath) {
// 1) Create path absolute to the root container
if (item == null) return null;
String absPath = "";
VFSItem tmpItem = item;
// Check for merged containers to fix problems with named containers, see OLAT-3848
List<NamedContainerImpl> namedRootChilds = new ArrayList<NamedContainerImpl>();
for (VFSItem rootItem : rootContainer.getItems()) {
if (rootItem instanceof NamedContainerImpl) {
namedRootChilds.add((NamedContainerImpl) rootItem);
}
}
// Check if root container is the same as the item and vice versa. It is
// necessary to perform the check on both containers to catch all potential
// cases with MergedSource and NamedContainer where the check in one
// direction is not necessarily the same as the opposite check
while (tmpItem != null && !rootContainer.isSame(tmpItem) && !tmpItem.isSame(rootContainer)) {
String itemFileName = tmpItem.getName();
// fxdiff FXOLAT-125: virtual file system for CP
if (tmpItem instanceof NamedLeaf) {
itemFileName = ((NamedLeaf) tmpItem).getDelegate().getName();
}
// Special case: check if this is a named container, see OLAT-3848
for (NamedContainerImpl namedRootChild : namedRootChilds) {
if (namedRootChild.isSame(tmpItem)) {
itemFileName = namedRootChild.getName();
}
}
absPath = "/" + itemFileName + absPath;
tmpItem = tmpItem.getParentContainer();
if (tmpItem != null) {
// test if this this is a merge source child container, see OLAT-5726
VFSContainer grandParent = tmpItem.getParentContainer();
if (grandParent instanceof MergeSource) {
MergeSource mergeGrandParent = (MergeSource) grandParent;
if (mergeGrandParent.isContainersChild((VFSContainer) tmpItem)) {
// skip this parent container and use the merge grand-parent
// instead, otherwise path contains the container twice
tmpItem = mergeGrandParent;
}
}
}
}
if (relativeBasePath == null) {
return absPath;
}
// 2) Compute rel path to base dir of the current file
// selpath = /a/irwas/subsub/nochsub/note.html 5
// filenam = /a/irwas/index.html 3
// --> subsub/nochsub/note.gif
// or /a/irwas/bla/index.html
// to /a/other/b/gugus.gif
// --> ../../ other/b/gugus.gif
// or /a/other/b/main.html
// to /a/irwas/bla/goto.html
// --> ../../ other/b/gugus.gif
String base = relativeBasePath; // assume "/" is here
if (!(base.indexOf("/") == 0)) {
base = "/" + base;
}
String[] baseA = base.split("/");
String[] targetA = absPath.split("/");
int sp = 1;
for (; sp < Math.min(baseA.length, targetA.length); sp++) {
if (!baseA[sp].equals(targetA[sp])) {
break;
}
}
// special case: self-reference
if (absPath.equals(base)) {
sp = 1;
}
StringBuilder buffer = new StringBuilder();
for (int i = sp; i < baseA.length - 1; i++) {
buffer.append("../");
}
for (int i = sp; i < targetA.length; i++) {
buffer.append(targetA[i] + "/");
}
buffer.deleteCharAt(buffer.length() - 1);
String path = buffer.toString();
String trimmed = path; // selectedPath.substring(1);
return trimmed;
}