1 files changed, 23 insertions, 0 deletions
diff --git a/lib/stitch_plan/trim.py b/lib/stitch_plan/trim.py
new file mode 100644
index 00000000..f692a179
--- /dev/null
+++ b/lib/stitch_plan/trim.py
@@ -0,0 +1,23 @@
+def process_trim(color_block, next_stitch):
+    """Handle the "trim after" checkbox.
+
+    DST (and maybe other formats?) has no actual TRIM instruction.
+    Instead, 3 sequential JUMPs cause the machine to trim the thread.
+
+    To support both DST and other formats, we'll add a TRIM and two
+    JUMPs.  The TRIM will be converted to a JUMP by libembroidery
+    if saving to DST, resulting in the 3-jump sequence.
+    """
+
+    delta = next_stitch - color_block.last_stitch
+    delta = delta * (1/4.0)
+
+    pos = color_block.last_stitch
+
+    for i in xrange(3):
+        pos += delta
+        color_block.add_stitch(pos.x, pos.y, jump=True)
+
+    # first one should be TRIM instead of JUMP
+    color_block.stitches[-3].jump = False
+    color_block.stitches[-3].trim = True