After numerous attempts I think I’m finally getting the hang of this.
For example, to get the start/end positions of the previous node in the document:
// first get the index of the current node at the root level
const parentIndex = $cursor.index(0);
// iterate the doc to find the offset of the previous index
let startPos, endPos;
doc.forEach((node, offset, index) => {
if (index === parentIndex - 1) {
startPos = offset;
endPos = offset + node.nodeSize;
}
});
Or to get the positions of the last child of the previous block:
doc.forEach((node, offset, index) => {
if (index === parentIndex - 1) {
node.forEach((childNode, childOffset, childIndex) => {
if (childIndex === node.childCount - 1) {
startPos = offset + childOffset;
endPos = startPos + node.nodeSize;
}
})
}
});
I tried many attempts which all ended up using node.eq(anotherNode) to determine if I had “found” the node I was interested in, but as @marijn has stated this is a bad idea. When iterating it’s possible you could get a different node if these are identical.
I also tried resolving positions inside a node (other than the document) but this was useless. All transforms require absolute global positions and I couldn’t find a way to “translate” a local position to a global one.