hanger when importing certain SVGs

backend/filereaders/svg_path_reader.py

@@ -310,6 +310,13 @@ def addCubicBezier(self, subpath, x1, y1, x2, y2, x3, y3, x4, y4, level):
             # protect from deep recursion cases
             # max 2**18 = 262144 segments
             return
+        elif level == 0:
+            if (x1 == x2 and y1 == y2 and x2 == x3 and y2 == y3) or \
+               (x2 == x3 and y2 == y3 and x3 == x4 and y3 == y4):
+                # the tolerance would never reached, but it's a straight line
+                #subpath.append([x1, y1]) # probably not needed
+                subpath.append([x4, y4])
+                return
 
         # Calculate all the mid-points of the line segments
         x12   = (x1 + x2) / 2.0

frontend/app.html

@@ -13,7 +13,6 @@
 <script src="/js/jquery.toastmessage.js"></script>
 <script src="/js/jquery.hotkeys.js"></script>
 <script src="/js/settings.js"></script>
-<script src="/js/app_svgreader.js"></script>
 <script src="/js/app_datahandler.js"></script>
 <script src="/js/app_canvas.js"></script>
 <script src="/js/app.js"></script>

frontend/js/app.js

@@ -419,7 +419,7 @@ $(document).ready(function(){
     // $().uxmessage('notice', gcode.replace(/\n/g, '<br>'));
     send_gcode(gcode, "Stopping ...", false); 
     var delayedresume = setTimeout(function() {
-      var gcode = '~\nG90\nM81\nG0X0Y0F'+app_settings.max_seek_speed+'\n'  // ~ is resume char
+      var gcode = '~\nG90\nG0X0Y0F'+app_settings.max_seek_speed+'\nM81\n'  // ~ is resume char
       // $().uxmessage('notice', gcode.replace(/\n/g, '<br>'));
       send_gcode(gcode, "Resetting ...", false);
     }, 1000);

frontend/js/app_datahandler.js

@@ -130,7 +130,7 @@ DataHandler = {
       }
     }
     // footer
-    glist.push("M81\nS0\nG0X0Y0F"+app_settings.max_seek_speed+"\n");
+    glist.push("S0\nG0X0Y0F"+app_settings.max_seek_speed+"\nM81\n");
     // alert(JSON.stringify(glist.join('')))
     return glist.join('');
   },