first check if there is a connection before acting on some events

The events 'step over', 'step in', 'step out', 'run to cursor' can only
ben done when there is an active debug session. So first check if we are
actually connected before allowing the rest of the code to run

Signed-off-by: BlackEagle <ike.devolder@gmail.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/python3/vdebug/event.py b/python3/vdebug/event.py
index 975bf13..a5b2ac7 100644
--- a/python3/vdebug/event.py
+++ b/python3/vdebug/event.py
@@ -316,6 +316,11 @@ class ListenEvent(Event):
 class StepOverEvent(Event):
 
     def run(self):
+        if not self.session or not self.session.is_connected():
+            self.ui.say("Step over is only possible when "
+                          "Vdebug is running")
+            return False
+
         log.Log("Stepping over")
         self.ui.set_status("running")
         res = self.api.step_over()
@@ -325,6 +330,11 @@ class StepOverEvent(Event):
 class StepIntoEvent(Event):
 
     def run(self):
+        if not self.session or not self.session.is_connected():
+            self.ui.say("Step in is only possible when "
+                          "Vdebug is running")
+            return False
+
         log.Log("Stepping into statement")
         self.ui.set_status("running")
         res = self.api.step_into()
@@ -334,6 +344,11 @@ class StepIntoEvent(Event):
 class StepOutEvent(Event):
 
     def run(self):
+        if not self.session or not self.session.is_connected():
+            self.ui.say("Step out is only possible when "
+                          "Vdebug is running")
+            return False
+
         log.Log("Stepping out of statement")
         self.ui.set_status("running")
         res = self.api.step_out()
@@ -343,6 +358,11 @@ class StepOutEvent(Event):
 class RunToCursorEvent(Event):
 
     def run(self):
+        if not self.session or not self.session.is_connected():
+            self.ui.say("Run to cursor is only possible when "
+                          "Vdebug is running")
+            return False
+
         row = self.ui.get_current_row()
         file = self.ui.get_current_file()
         if file != self.ui.sourcewin.get_file():