3 files changed, 39 insertions, 3 deletions
diff --git a/lib/stitch_plan/color_block.py b/lib/stitch_plan/color_block.py
index 9d474f80..fdef5eb8 100644
--- a/lib/stitch_plan/color_block.py
+++ b/lib/stitch_plan/color_block.py
@@ -3,10 +3,12 @@
 # Copyright (c) 2010 Authors
 # Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
 
-from .stitch import Stitch
+from typing import List
+
+from ..svg import PIXELS_PER_MM
 from ..threads import ThreadColor
 from ..utils.geometry import Point
-from ..svg import PIXELS_PER_MM
+from .stitch import Stitch
 
 
 class ColorBlock(object):
@@ -155,3 +157,20 @@ class ColorBlock(object):
         maxy = max(stitch.y for stitch in self)
 
         return minx, miny, maxx, maxy
+
+    def make_offsets(self, offsets: List[Point]):
+        first_final_stitch = len(self.stitches)
+        while (first_final_stitch > 0 and self.stitches[first_final_stitch-1].is_terminator):
+            first_final_stitch -= 1
+        if first_final_stitch == 0:
+            return self
+        final_stitches = self.stitches[first_final_stitch:]
+        block_stitches = self.stitches[:first_final_stitch]
+
+        out = ColorBlock(self.color)
+        for i, offset in enumerate(offsets):
+            out.add_stitches([s.offset(offset) for s in block_stitches])
+            if i != len(offsets) - 1:
+                out.add_stitch(trim=True)
+        out.add_stitches(final_stitches)
+        return out
diff --git a/lib/stitch_plan/stitch.py b/lib/stitch_plan/stitch.py
index 90af58c0..8ad699c7 100644
--- a/lib/stitch_plan/stitch.py
+++ b/lib/stitch_plan/stitch.py
@@ -68,6 +68,10 @@ class Stitch(Point):
         if value or base_stitch is None:
             setattr(self, attribute, value)
 
+    @property
+    def is_terminator(self) -> bool:
+        return self.trim or self.stop or self.color_change
+
     def add_tags(self, tags):
         for tag in tags:
             self.add_tag(tag)
@@ -93,6 +97,12 @@ class Stitch(Point):
     def copy(self):
         return Stitch(self.x, self.y, self.color, self.jump, self.stop, self.trim, self.color_change, self.tags)
 
+    def offset(self, offset: Point):
+        out = self.copy()
+        out.x += offset.x
+        out.y += offset.y
+        return out
+
     def __json__(self):
         attributes = dict(vars(self))
         attributes['tags'] = list(attributes['tags'])
diff --git a/lib/stitch_plan/stitch_plan.py b/lib/stitch_plan/stitch_plan.py
index 25571578..caea9c09 100644
--- a/lib/stitch_plan/stitch_plan.py
+++ b/lib/stitch_plan/stitch_plan.py
@@ -4,13 +4,15 @@
 # Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
 
 from sys import exit
+from typing import List
 
 from inkex import errormsg
 
 from ..i18n import _
 from ..svg import PIXELS_PER_MM
-from .color_block import ColorBlock
+from ..utils.geometry import Point
 from ..utils.threading import check_stop_flag
+from .color_block import ColorBlock
 
 
 def stitch_groups_to_stitch_plan(stitch_groups, collapse_len=None, min_stitch_len=0.1, disable_ties=False):  # noqa: C901
@@ -207,3 +209,8 @@ class StitchPlan(object):
             return self.color_blocks[-1]
         else:
             return None
+
+    def make_offsets(self, offsets: List[Point]):
+        out = StitchPlan()
+        out.color_blocks = [block.make_offsets(offsets) for block in self]
+        return out