confirm start debug if there are no init breakpoints set and break at first line is unchecked

Author: robertbasic

pugdebug/pugdebug.py

@@ -12,7 +12,7 @@
 import os
 
 from PyQt5.QtCore import QObject
-from PyQt5.QtWidgets import QErrorMessage
+from PyQt5.QtWidgets import QErrorMessage, QMessageBox
 
 from pugdebug.debugger import PugdebugDebugger
 from pugdebug.syntaxer import PugdebugFormatter
@@ -357,13 +357,30 @@ def start_debug(self):
 
         Start a debugging session.
         """
-        self.variable_viewer.clear()
-        self.stacktrace_viewer.clear()
+        break_at_first_line = int(get_setting('debugger/break_at_first_line'))
+
+        start_debugging = True
+
+        if break_at_first_line == 0 and len(self.init_breakpoints) == 0:
+            messageBox = QMessageBox()
+            messageBox.setText("There are no breakpoints set and the break at"
+                               " first line setting is turned off.")
+            messageBox.setInformativeText("Are you sure you want to start"
+                                          " debugging?")
+            messageBox.setStandardButtons(QMessageBox.Yes | QMessageBox.No)
+            answer = messageBox.exec()
+
+            if answer == QMessageBox.No:
+                start_debugging = False
+
+        if start_debugging:
+            self.variable_viewer.clear()
+            self.stacktrace_viewer.clear()
 
-        self.document_viewer.remove_line_highlights()
+            self.document_viewer.remove_line_highlights()
 
-        self.debugger.start_debug()
-        self.main_window.set_statusbar_text("Waiting for connection...")
+            self.debugger.start_debug()
+            self.main_window.set_statusbar_text("Waiting for connection...")
 
     def handle_debugging_started(self):
         """Handle when debugging starts