NS_IMETHODIMP
DeleteCommand::IsCommandEnabled(const char* aCommandName,
nsISupports* aCommandRefCon, bool* aIsEnabled) {
if (NS_WARN_IF(!aIsEnabled)) {
return NS_ERROR_INVALID_ARG;
}
*aIsEnabled = false;
nsCOMPtr<nsIEditor> editor = do_QueryInterface(aCommandRefCon);
if (!editor) {
return NS_OK;
}
TextEditor* textEditor = editor->AsTextEditor();
MOZ_ASSERT(textEditor);
// We can generally delete whenever the selection is editable. However,
// cmd_delete doesn't make sense if the selection is collapsed because it's
// directionless, which is the same condition under which we can't cut.
*aIsEnabled = textEditor->IsSelectionEditable();
if (!nsCRT::strcmp("cmd_delete", aCommandName) && *aIsEnabled) {
nsresult rv = textEditor->CanDelete(aIsEnabled);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
return NS_OK;
}
