/** Replaces a node with another, preserving attributes */
public static SNode replaceWithAnother(@NotNull SNode node, SNode replacer) {
SNode nodeParent = node.getParent();
if (nodeParent == null) {
SModel model = node.getModel();
if (model != null) {
node.delete();
model.addRootNode(replacer);
}
return replacer;
}
SContainmentLink role = node.getContainmentLink();
assert role != null;
if (replacer != null) {
// old and new child can have the same node Id
// thus it is important to remove old child first
SNode anchor = node.getNextSibling();
nodeParent.removeChild(node);
SNode replacerParent = replacer.getParent();
if (replacerParent != null) {
replacerParent.removeChild(replacer);
}
nodeParent.insertChildBefore(role, replacer, anchor);
} else {
nodeParent.removeChild(node);
}
return replacer;
}
private boolean canPasteBefore(EditorCell selectedCell, List<SNode> pasteNodes) {
if (!selectedCell.isFirstPositionInBigCell()) return false;
SNode anchor = selectedCell.getSNode();
if (anchor.getParent() == null) return false;
NodeAndRole nodeAndRole =
new NodePaster(pasteNodes).getActualAnchorNode(anchor, anchor.getRoleInParent());
if (nodeAndRole == null) return false;
EditorCell targetCell = selectedCell.getEditor().findNodeCell(nodeAndRole.myNode);
return targetCell != null
&& targetCell.getFirstLeaf(CellConditions.SELECTABLE) == selectedCell
&& new NodePaster(pasteNodes).canPasteRelative(nodeAndRole.myNode);
}