From 39a55cf951c1943e220b11e662fbbae98cb4ca75 Mon Sep 17 00:00:00 2001
From: Yorik van Havre <yorik@uncreated.net>
Date: Wed, 30 Dec 2015 12:30:40 -0200
Subject: [PATCH] Draft: small fix in patterns

---
 src/Mod/Draft/Draft.py                 |  2 +
 src/Mod/Path/PathScripts/slic3r_pre.py | 97 ++++++++++++++++++++++++++
 2 files changed, 99 insertions(+)
 create mode 100644 src/Mod/Path/PathScripts/slic3r_pre.py

diff --git a/src/Mod/Draft/Draft.py b/src/Mod/Draft/Draft.py
index da5605385..6eb677628 100644
--- a/src/Mod/Draft/Draft.py
+++ b/src/Mod/Draft/Draft.py
@@ -3229,6 +3229,8 @@ class _ViewProviderDraft:
                         if hasattr(vobj,"Pattern"):
                             if str(vobj.Pattern) in list(svgpatterns().keys()):
                                 path = svgpatterns()[vobj.Pattern][1]
+                            else:
+                                path = "None"
                     if path and vobj.RootNode:
                         if vobj.RootNode.getChildren().getLength() > 2:
                             if vobj.RootNode.getChild(2).getChildren().getLength() > 0:
diff --git a/src/Mod/Path/PathScripts/slic3r_pre.py b/src/Mod/Path/PathScripts/slic3r_pre.py
new file mode 100644
index 000000000..2e25659fb
--- /dev/null
+++ b/src/Mod/Path/PathScripts/slic3r_pre.py
@@ -0,0 +1,97 @@
+#***************************************************************************
+#*   (c) Yorik van Havre (yorik@uncreated.net) 2015                        *
+#*                                                                         *
+#*   This file is part of the FreeCAD CAx development system.              *
+#*                                                                         *
+#*   This program is free software; you can redistribute it and/or modify  *
+#*   it under the terms of the GNU Lesser General Public License (LGPL)    *
+#*   as published by the Free Software Foundation; either version 2 of     *
+#*   the License, or (at your option) any later version.                   *
+#*   for detail see the LICENCE text file.                                 *
+#*                                                                         *
+#*   FreeCAD is distributed in the hope that it will be useful,            *
+#*   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+#*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+#*   GNU Lesser General Public License for more details.                   *
+#*                                                                         *
+#*   You should have received a copy of the GNU Library General Public     *
+#*   License along with FreeCAD; if not, write to the Free Software        *
+#*   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+#*   USA                                                                   *
+#*                                                                         *
+#***************************************************************************/
+
+
+'''
+This is an preprocessor to read gcode files produced from slic3r.
+'''
+
+import os, Path
+import FreeCAD
+
+# to distinguish python built-in open function from the one declared below
+if open.__module__ == '__builtin__':
+    pythonopen = open
+
+
+def open(filename):
+    "called when freecad opens a file."
+    docname = os.path.splitext(os.path.basename(filename))[0]
+    doc = FreeCAD.newDocument(docname)
+    insert(filename,doc.Name)
+
+
+def insert(filename,docname):
+    "called when freecad imports a file"
+    gfile = pythonopen(filename)
+    gcode = gfile.read()
+    gfile.close()
+    gcode = parse(gcode)
+    doc = FreeCAD.getDocument(docname)
+    obj = doc.addObject("Path::Feature","Path")
+    path = Path.Path(gcode)
+    obj.Path = path
+
+            
+def parse(inputstring):
+    "parse(inputstring): returns a parsed output string"
+    print "preprocessing..."
+    
+    # split the input by line
+    lines = inputstring.split("\n")
+    output = ""
+    lastcommand = None
+    
+    for l in lines:
+        # remove any leftover trailing and preceding spaces
+        l = l.strip()
+        if not l:
+            # discard empty lines
+            continue
+        if l[0].upper() in ["N"]:
+            # remove line numbers
+            l = l.split(" ",1)[1]
+        if ";" in l:
+            # replace ; comments with ()
+            l = l.replace(";","(")
+            l = l+")"
+        if l[0].upper() in ["G","M","("]:
+            # found a G or M command: we store it
+            output += l + "\n"
+            last = l[0].upper()
+            for c in l[1:]:
+                if not c.isdigit():
+                    break
+                else:
+                    last += c
+            lastcommand = last
+        elif lastcommand:
+            # no G or M command: we repeat the last one
+            output += lastcommand + " " + l + "\n"
+            
+    print "done preprocessing."
+    return output
+
+
+print __name__ + " gcode preprocessor loaded."
+