# HG changeset patch
# User mbayer
# Date 1446911835 -3600
# Node ID ff679c15cb0e69b0ae539a2a311da78cee143ba9
# Parent  b41cdab37aab6599738d66895140d8bcab056222
infill only on Polygon or Path which have fill style attribute

diff -r b41cdab37aab -r ff679c15cb0e svg2gcode/svg2gcode.py
--- a/svg2gcode/svg2gcode.py	Sat Nov 07 15:51:29 2015 +0100
+++ b/svg2gcode/svg2gcode.py	Sat Nov 07 16:57:15 2015 +0100
@@ -4,6 +4,7 @@
 import svg, sys
 from gcode import Gcode
 from optparse import OptionParser
+from tinycss import CSS21Parser
 
 from shapely.geometry import box, MultiLineString, Point, Polygon
 from shapely.affinity import rotate
@@ -61,12 +62,7 @@
     # return clipped array
     return rect.intersection(lines)
 
-def infill(bbox, polygon, angle=0, spacing=10):
-    b1, b2 = bbox
-    x1, y1 = b1.coord()
-    x2, y2 = b2.coord()
-    page = box(x1, y1, x2, y2)
-    hatching = hatchbox(page, angle, spacing)
+def get_infill(polygon):
     # create shape from polygon:
     segments = []
     for pnt in polygon:
@@ -74,7 +70,10 @@
         segments.append((x, y))
 
     shape = Polygon(segments)
-    return shape.intersection(hatching)
+    if shape.is_valid:
+        return shape.intersection(INFILL)
+    else:
+        return []
 
 parser = OptionParser()
 parser.add_option("-f", "--file", dest="filename", default=None,
@@ -110,6 +109,21 @@
 height *= gcode.mm_pixel * options.scale
 print "Print dimension: %.2fmm x %.2fmm" % (width, height)
 
+x1, y1 = b1.coord()
+x2, y2 = b2.coord()
+page = box(x1, y1, x2, y2)
+INFILL = hatchbox(page, 0, 2)
+
+def parse_style(stylestr):
+    if stylestr.strip() == '':
+        return None
+    parser = CSS21Parser()
+    style = parser.parse_style_attr(stylestr)
+    kv = {}
+    for obj in style[0]:
+        kv[obj.name] = obj.value[0].value
+    return kv
+
 def normalize(coord):
     x = coord[0]
     y = coord[1]
@@ -128,9 +142,21 @@
                 x, y = normalize(pt.coord())
                 gcode.engrave(x, y)
 
-            if not options.outline:
+            if options.outline:
+                continue
+
+            if (isinstance(d, svg.Polygon) or isinstance(d, svg.Path)):
+                #check if we shoild infill?
+                style = parse_style(d.style)
+                if not style:
+                    continue
+                if not 'fill' in style.keys():
+                    continue
+                if style['fill'] == 'none':
+                    continue
+
                 # THE INFILL
-                for line in infill(im.bbox(), l, spacing=2):
+                for line in get_infill(l):
                     start = normalize((line.coords[0][0], line.coords[0][1]))
                     end = normalize((line.coords[1][0], line.coords[1][1]))
                     gcode.move(start[0], start[1])