From a50bbc788b1d21aaae036b51b190039d54afa072 Mon Sep 17 00:00:00 2001
From: James Cherry <cherry@parallaxsw.com>
Date: Wed, 6 May 2020 14:12:55 -0700
Subject: [PATCH] Sta::networkChanged

---
 include/sta/Sta.hh |  2 ++
 search/Sta.cc      | 22 ++++++++++++++++++++++
 tcl/NetworkEdit.i  |  7 +++++++
 3 files changed, 31 insertions(+)

diff --git a/include/sta/Sta.hh b/include/sta/Sta.hh
index 35248c20..4f7d4e18 100644
--- a/include/sta/Sta.hh
+++ b/include/sta/Sta.hh
@@ -1116,6 +1116,8 @@ public:
 			  Net *net);
   // disconnect_net
   virtual void disconnectPin(Pin *pin);
+  // Notify STA of network change.
+  void networkChanged();
 
   // Network edit before/after methods.
   void makeInstanceAfter(Instance *inst);
diff --git a/search/Sta.cc b/search/Sta.cc
index da1384da..f0851495 100644
--- a/search/Sta.cc
+++ b/search/Sta.cc
@@ -534,6 +534,28 @@ Sta::clear()
   updateComponentsState();
 }
 
+void
+Sta::networkChanged()
+{
+  // Remove sdc graph annotations.
+  sdc_->annotateGraph(false);
+  // Everything else from clear().
+  search_->clear();
+  levelize_->clear();
+  if (parasitics_)
+    parasitics_->clear();
+  graph_delay_calc_->clear();
+  sim_->clear();
+  if (check_min_pulse_widths_)
+    check_min_pulse_widths_->clear();
+  if (check_min_periods_)
+    check_min_periods_->clear();
+  delete graph_;
+  graph_ = nullptr;
+  current_instance_ = nullptr;
+  updateComponentsState();
+}
+
 void
 Sta::setTclInterp(Tcl_Interp *interp)
 {
diff --git a/tcl/NetworkEdit.i b/tcl/NetworkEdit.i
index 388b95c4..f85ea674 100644
--- a/tcl/NetworkEdit.i
+++ b/tcl/NetworkEdit.i
@@ -93,4 +93,11 @@ disconnect_pin_cmd(Pin *pin)
   Sta::sta()->disconnectPin(pin);
 }
 
+// Notify STA of network change.
+void
+network_changed()
+{
+  Sta::sta()->networkChanged();
+}
+
 %} // inline