basic lettering (#344)

Can handle multiple lines of text and routes the stitching in alternating directions on each line.

2 files changed, 51 insertions, 3 deletions

diff --git a/lib/elements/__init__.py b/lib/elements/__init__.py
index 22603217..5413ba04 100644
--- a/lib/elements/__init__.py
+++ b/lib/elements/__init__.py
@@ -1,6 +1,7 @@
+from auto_fill import AutoFill
 from element import EmbroideryElement
+from fill import Fill
+from polyline import Polyline
 from satin_column import SatinColumn
 from stroke import Stroke
-from polyline import Polyline
-from fill import Fill
-from auto_fill import AutoFill
+from utils import node_to_elements, nodes_to_elements
diff --git a/lib/elements/utils.py b/lib/elements/utils.py
new file mode 100644
index 00000000..87dfa877
--- /dev/null
+++ b/lib/elements/utils.py
@@ -0,0 +1,47 @@
+
+from ..commands import is_command
+from ..svg.tags import SVG_POLYLINE_TAG, SVG_PATH_TAG
+
+from .auto_fill import AutoFill
+from .element import EmbroideryElement
+from .fill import Fill
+from .polyline import Polyline
+from .satin_column import SatinColumn
+from .stroke import Stroke
+
+
+def node_to_elements(node):
+    if node.tag == SVG_POLYLINE_TAG:
+        return [Polyline(node)]
+    elif node.tag == SVG_PATH_TAG:
+        element = EmbroideryElement(node)
+
+        if element.get_boolean_param("satin_column"):
+            return [SatinColumn(node)]
+        else:
+            elements = []
+
+            if element.get_style("fill", "black"):
+                if element.get_boolean_param("auto_fill", True):
+                    elements.append(AutoFill(node))
+                else:
+                    elements.append(Fill(node))
+
+            if element.get_style("stroke"):
+                if not is_command(element.node):
+                    elements.append(Stroke(node))
+
+            if element.get_boolean_param("stroke_first", False):
+                elements.reverse()
+
+            return elements
+    else:
+        return []
+
+
+def nodes_to_elements(nodes):
+    elements = []
+    for node in nodes:
+        elements.extend(node_to_elements(node))
+
+    return elements