Fix zip import/export and bounds for empty boards

gerbonara/cam.py

@@ -267,6 +267,8 @@ class CamFile:
 
         # setup viewport transform flipping y axis
         (content_min_x, content_min_y), (content_max_x, content_max_y) = bounds
+        content_min_x, content_min_y = float(content_min_x), float(content_min_y)
+        content_max_x, content_max_y = float(content_max_x), float(content_max_y)
         content_w, content_h = content_max_x - content_min_x, content_max_y - content_min_y
         xform = f'translate({content_min_x:.6} {content_min_y+content_h:.6}) scale(1 -1) translate({-content_min_x:.6} {-content_min_y:.6})'
         tags = [tag('g', tags, transform=xform)]

gerbonara/layers.py

@@ -27,6 +27,7 @@ import itertools
 from collections import namedtuple
 from pathlib import Path
 from zipfile import ZipFile, is_zipfile
+import tempfile
 
 from .excellon import ExcellonFile, parse_allegro_ncparam, parse_allegro_logfile
 from .rs274x import GerberFile
@@ -249,13 +250,13 @@ class LayerStack:
     @classmethod
     def open_zip(kls, file, original_path=None, board_name=None, lazy=False):
         tmpdir = tempfile.TemporaryDirectory()
-        tmp_indir = Path(tmpdir) / 'input'
+        tmp_indir = Path(tmpdir.name) / 'input'
         tmp_indir.mkdir()
 
         with ZipFile(file) as f:
             f.extractall(path=tmp_indir)
 
-        inst = kls.from_directory(tmp_indir, board_name=board_name, lazy=lazy)
+        inst = kls.open_dir(tmp_indir, board_name=board_name, lazy=lazy)
         inst.tmpdir = tmpdir
         inst.original_path = Path(original_path or file)
         inst.was_zipped = True
@@ -486,7 +487,7 @@ class LayerStack:
         if force_bounds:
             bounds = svg_unit.convert_bounds_from(arg_unit, force_bounds)
         else:
-            bounds = selfboard_bounds(unit=svg_unit, default=((0, 0), (0, 0)))
+            bounds = self.board_bounds(unit=svg_unit, default=((0, 0), (0, 0)))
         
         tags = []
         inkscape_attrs = lambda label: dict(inkscape__groupmode='layer', inkscape__label=label) if inkscape else {}

gerbonara/utils.py

@@ -269,7 +269,7 @@ def sum_bounds(bounds, *, default=None):
     :rtype: tuple
     """
 
-    bounds = iter(bounds)
+    bounds = iter([ b for b in bounds if b is not None ])
 
     for (min_x, min_y), (max_x, max_y) in bounds:
         break