Improve logic for automatic selection names

[alexxy/gromacs.git] / src / gromacs / selection / sm_position.cpp

diff --git a/src/gromacs/selection/sm_position.cpp b/src/gromacs/selection/sm_position.cpp
index fe85404536f1c6e8bf3355c3cbd7f7da6c270ec4..ad174aa1591118fbec7f170d7de7348663886637 100644 (file)
--- a/src/gromacs/selection/sm_position.cpp
+++ b/src/gromacs/selection/sm_position.cpp
@@ -225,6 +225,19 @@ set_poscoll_pos(gmx::PositionCalculationCollection *pcc, void *data)
     ((t_methoddata_pos *)data)->pcc = pcc;
 }
 
+bool
+_gmx_selelem_is_default_kwpos(const gmx::SelectionTreeElement &sel)
+{
+    if (sel.type != SEL_EXPRESSION || !sel.u.expr.method
+        || sel.u.expr.method->name != sm_keyword_pos.name)
+    {
+        return false;
+    }
+
+    t_methoddata_pos *d = static_cast<t_methoddata_pos *>(sel.u.expr.mdata);
+    return d->type == NULL;
+}
+
 /*!
  * \param[in,out] sel   Selection element to initialize.
  * \param[in]     type  One of the enum values acceptable for