Add kicad 7 native dnp field support

Fixes #361

Author: qu1ck

InteractiveHtmlBom/ecad/kicad.py

@@ -37,11 +37,15 @@ def get_extra_field_data(self, file_name):
     @staticmethod
     def get_footprint_fields(f):
         # type: (pcbnew.FOOTPRINT) -> dict
+        props = {}
         if hasattr(f, "GetProperties"):
-            return f.GetProperties()
+            props = f.GetProperties()
         if hasattr(f, "GetFields"):
-            return f.GetFieldsShownText()
-        return {}
+            props = f.GetFieldsShownText()
+        if "dnp" in props and props["dnp"] == "":
+            del props["dnp"]
+            props["kicad_dnp"] = True
+        return props
 
     def parse_extra_data_from_pcb(self):
         field_set = set()

InteractiveHtmlBom/ecad/kicad_extra/netlistparser.py

@@ -21,6 +21,7 @@ def get_extra_field_data(self):
             fields = None
             datasheet = None
             libsource = None
+            dnp = False
             for f in c[1:]:
                 if f[0] == 'ref':
                     ref = f[1]
@@ -30,6 +31,9 @@ def get_extra_field_data(self):
                     datasheet = f[1]
                 if f[0] == 'libsource':
                     libsource = f[1:]
+                if f[0] == 'property' and isinstance(f[1], list) and \
+                        f[1][0] == 'name' and f[1][1] == 'dnp':
+                    dnp = True
             if ref is None:
                 return None
             ref_fields = comp_dict.setdefault(ref, {})
@@ -41,6 +45,9 @@ def get_extra_field_data(self):
                     if lib_field[0] == 'description':
                         field_set.add('Description')
                         ref_fields['Description'] = lib_field[1]
+            if dnp:
+                field_set.add('kicad_dnp')
+                ref_fields['kicad_dnp'] = True
             if fields is None:
                 continue
             for f in fields:

InteractiveHtmlBom/ecad/kicad_extra/xmlparser.py

@@ -34,5 +34,9 @@ def get_extra_field_data(self):
                 name = f.attributes['name'].value
                 field_set.add(name)
                 ref_fields[name] = self.get_text(f.childNodes)
+            for f in c.getElementsByTagName('property'):
+                if f.attributes['name'].value == 'dnp':
+                    field_set.add('kicad_dnp')
+                    ref_fields['kicad_dnp'] = True
 
         return list(field_set), comp_dict