4 files changed, 61 insertions, 1 deletions
diff --git a/lib/svg/__init__.py b/lib/svg/__init__.py
index 74a409b6..df76c0d2 100644
--- a/lib/svg/__init__.py
+++ b/lib/svg/__init__.py
@@ -1,3 +1,4 @@
 from .svg import color_block_to_point_lists, render_stitch_plan
 from .units import *
 from .path import apply_transforms, get_node_transform, get_correction_transform, line_strings_to_csp, point_lists_to_csp
+from .guides import get_guides
diff --git a/lib/svg/guides.py b/lib/svg/guides.py
new file mode 100644
index 00000000..3e26a90d
--- /dev/null
+++ b/lib/svg/guides.py
@@ -0,0 +1,43 @@
+import simpletransform
+
+from ..utils import string_to_floats, Point, cache
+from .tags import SODIPODI_NAMEDVIEW, SODIPODI_GUIDE, INKSCAPE_LABEL
+from .units import get_doc_size, get_viewbox_transform
+
+
+class InkscapeGuide(object):
+    def __init__(self, node):
+        self.node = node
+        self.svg = node.getroottree().getroot()
+
+        self._parse()
+
+    def _parse(self):
+        self.label = self.node.get(INKSCAPE_LABEL, "")
+
+        doc_size = list(get_doc_size(self.svg))
+
+        # convert the size from viewbox-relative to real-world pixels
+        viewbox_transform = get_viewbox_transform(self.svg)
+        simpletransform.applyTransformToPoint(simpletransform.invertTransform(viewbox_transform), doc_size)
+
+        self.position = Point(*string_to_floats(self.node.get('position')))
+
+        # inkscape's Y axis is reversed from SVG's, and the guide is in inkscape coordinates
+        self.position.y = doc_size[1] - self.position.y
+
+        # This one baffles me.  I think inkscape might have gotten the order of
+        # their vector wrong?
+        parts = string_to_floats(self.node.get('orientation'))
+        self.direction = Point(parts[1], parts[0])
+
+
+@cache
+def get_guides(svg):
+    """Find all Inkscape guides and return as InkscapeGuide instances."""
+
+    namedview = svg.find(SODIPODI_NAMEDVIEW)
+    if namedview is None:
+        return []
+
+    return [InkscapeGuide(node) for node in namedview.findall(SODIPODI_GUIDE)]
diff --git a/lib/svg/path.py b/lib/svg/path.py
index 6212211f..d2b4aee1 100644
--- a/lib/svg/path.py
+++ b/lib/svg/path.py
@@ -1,3 +1,4 @@
+import inkex
 import simpletransform
 
 from .units import get_viewbox_transform
@@ -12,6 +13,19 @@ def apply_transforms(path, node):
     return path
 
 
+def compose_parent_transforms(node, mat):
+    # This is adapted from Inkscape's simpletransform.py's composeParents()
+    # function.  That one can't handle nodes that are detached from a DOM.
+
+    trans = node.get('transform')
+    if trans:
+        mat = simpletransform.composeTransform(simpletransform.parseTransform(trans), mat)
+    if node.getparent() is not None:
+        if node.getparent().tag == inkex.addNS('g', 'svg'):
+            mat = compose_parent_transforms(node.getparent(), mat)
+    return mat
+
+
 def get_node_transform(node):
     # start with the identity transform
     transform = [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]
@@ -19,7 +33,7 @@ def get_node_transform(node):
     # this if is because sometimes inkscape likes to create paths outside of a layer?!
     if node.getparent() is not None:
         # combine this node's transform with all parent groups' transforms
-        transform = simpletransform.composeParents(node, transform)
+        transform = compose_parent_transforms(node, transform)
 
     # add in the transform implied by the viewBox
     viewbox_transform = get_viewbox_transform(node.getroottree().getroot())
diff --git a/lib/svg/tags.py b/lib/svg/tags.py
index 7eb87540..55352be2 100644
--- a/lib/svg/tags.py
+++ b/lib/svg/tags.py
@@ -14,5 +14,7 @@ CONNECTION_START = inkex.addNS('connection-start', 'inkscape')
 CONNECTION_END = inkex.addNS('connection-end', 'inkscape')
 CONNECTOR_TYPE = inkex.addNS('connector-type', 'inkscape')
 XLINK_HREF = inkex.addNS('href', 'xlink')
+SODIPODI_NAMEDVIEW = inkex.addNS('namedview', 'sodipodi')
+SODIPODI_GUIDE = inkex.addNS('guide', 'sodipodi')
 
 EMBROIDERABLE_TAGS = (SVG_PATH_TAG, SVG_POLYLINE_TAG)