The Safe Delete refactoring also builds on the same Find Usages framework as Rename Refactoring.
In addition to that, to support Safe Delete, a plugin needs to implement two things:
The RefactoringSupportProvider interface, registered in the com.intellij.lang.refactoringSupport extension point, and the isSafeDeleteAvailable() method, which checks if the Safe Delete refactoring is available for a specific PSI element
The PsiElement.delete() method for the PsiElement subclasses for which Safe Delete is available. Deleting PSI elements is implemented by deleting the underlying AST nodes from the AST tree (which, in turn, causes the text ranges corresponding to the AST nodes to be deleted from the document).
Example: delete() implementation for a Property in Properties language plugin
If needed, it's possible to further customize how Safe Delete is performed for a particular type of element (e.g., how references are searched) via SafeDeleteProcessorDelegate.
Example: SafeDeleteProcessorDelegate implementation for Properties language plugin
05 August 2025
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