syncSelectionManager function

void syncSelectionManager(FluentDocument document)

Synchronizes SelectionManager with the current cursor state.

Implementation

void syncSelectionManager(FluentDocument document) {
  final cursor = document.cursor;

  if (cursor.isCollapsed) {
    document.selectionManager.collapse();
    return;
  }

  final anchorNodeId = document.findLogicalContainerId(cursor.anchorId);
  final focusNodeId  = document.findLogicalContainerId(cursor.focusId);

  if (anchorNodeId == null || focusNodeId == null) {
    document.selectionManager.clear();
    return;
  }

  document.selectionManager.startSelection(
    anchorNodeId,
    cursor.anchorId,
    cursor.anchorOffset,
  );
  document.selectionManager.updateFocus(
    focusNodeId,
    cursor.focusId,
    cursor.focusOffset,
  );
}