Implement GenCAD import

Fixes openscopeproject#392

InteractiveHtmlBom/ecad/__init__.py

@@ -17,6 +17,8 @@ def get_parser_by_extension(file_name, config, logger):
             return get_easyeda_parser(file_name, config, logger)
     elif ext in ['.fbrd', '.brd']:
         return get_fusion_eagle_parser(file_name, config, logger)
+    elif ext in ['.cad']:
+        return get_gencad_parser(file_name, config, logger)
     else:
         return None
 
@@ -39,3 +41,8 @@ def get_generic_json_parser(file_name, config, logger):
 def get_fusion_eagle_parser(file_name, config, logger):
     from .fusion_eagle import FusionEagleParser
     return FusionEagleParser(file_name, config, logger)
+
+
+def get_gencad_parser(file_name, config, logger):
+    from .gencad import GenCadParser
+    return GenCadParser(file_name, config, logger)

InteractiveHtmlBom/ecad/common.py

@@ -131,7 +131,7 @@ def add_arc():
                 la = 1 if da > 180 else 0
                 svgpath = 'M %s %s A %s %s 0 %s 1 %s %s' % \
                           (x1, y1, r, r, la, x2, y2)
-                bbox.add_svgpath(svgpath, width, self.logger)
+                bbox.add_svgpath(svgpath, width, 0, 0, self.logger)
 
         {
             'segment': add_segment,
@@ -232,12 +232,12 @@ def add_circle(self, x, y, r):
         self.add_point(x, y + r)
         return self
 
-    def add_svgpath(self, svgpath, width, logger):
+    def add_svgpath(self, svgpath, width, x, y, logger):
         w = width / 2
         for segment in parse_path(svgpath, logger):
             x0, x1, y0, y1 = segment.bbox()
-            self.add_point(x0 - w, y0 - w)
-            self.add_point(x1 + w, y1 + w)
+            self.add_point(x0 - w + x, y0 - w + y)
+            self.add_point(x1 + w + x, y1 + w + y)
 
     def pad(self, amount):
         """Add small padding to the box."""