/**
* We can use this method to determine if we should redispatch insert event to the corresponding
* child collection below the cell returned from cell.getPrevLeaf() or we should go on and insert
* prev. child into a collection containing cell itself
*
* @return true if we should redispatch insert event to the prev. leaft cell
*/
private static boolean hasSingleRolesAtLeftBoundary(EditorCell cell) {
if (!(hasSingleRole(cell))) {
return false;
}
if (isOnLeftBoundary(cell)) {
final EditorCell_Collection parentCell = cell.getParent();
if (parentCell != null) {
final EditorCell prevLeaf = APICellAdapter.getPrevLeaf(cell);
if (prevLeaf != null) {
final Wrappers._boolean ancestor = new Wrappers._boolean(false);
ModelAccess.instance()
.runReadAction(
new Runnable() {
public void run() {
ancestor.value =
SNodeOperations.isAncestor(parentCell.getSNode(), prevLeaf.getSNode());
}
});
if (ancestor.value) {
return true;
}
}
return hasSingleRolesAtLeftBoundary((jetbrains.mps.nodeEditor.cells.EditorCell) parentCell);
}
}
return true;
}
public static EditorCell getSiblingCollectionForInsert(
@NotNull EditorCell cell, boolean forward) {
// TODO FIXME rewrite without hasSingleRolesAtLeftBoundary, cleanup ChildrenCollectionFinder
EditorCell nextLeaf =
(forward ? APICellAdapter.getNextLeaf(cell) : APICellAdapter.getPrevLeaf(cell));
if ((APICellAdapter.isBigCell(cell) || APICellAdapter.isLastPositionInBigCell(cell))
&& ((forward ? hasSingleRolesAtRightBoundary(cell) : hasSingleRolesAtLeftBoundary(cell)))
&& nextLeaf != null) {
// Looking for the next child collection in parents
return new ChildrenCollectionFinder(nextLeaf, cell, forward, true).find();
}
return null;
}
public static boolean isOnLeftBoundary(EditorCell cell) {
EditorCell prevLeaf = APICellAdapter.getPrevLeaf(cell);
return prevLeaf == null || prevLeaf.getSNode() != cell.getSNode();
}