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-rwxr-xr-xlib/export-carriage.py90
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/export-carriage.py b/lib/export-carriage.py
new file mode 100755
index 0000000..69e5133
--- /dev/null
+++ b/lib/export-carriage.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+
+import numpy as np
+import subprocess
+import sys
+
+
+class SVGObject:
+ def __init__(self, attrlist):
+ self.id = attrlist[0]
+ self.x = float(attrlist[1])
+ self.y = float(attrlist[2])
+ self.w = float(attrlist[3])
+ self.h = float(attrlist[4])
+ self.x_ = self.x + self.w
+ self.y_ = self.y + self.h
+
+ def is_path(self):
+ return self.id.startswith("path")
+
+ def is_tspan(self):
+ return self.id.startswith("tspan")
+
+ def __repr__(self):
+ return "{}<x={}, y={}, w={}, h={}>".format(
+ self.id, self.x, self.y, self.w, self.h
+ )
+
+
+def main(infile, outfile):
+ ret = subprocess.run(
+ ["inkscape", "--query-all", infile], capture_output=True, check=True
+ )
+
+ objects = ret.stdout.decode("ascii").split("\n")
+
+ # remove last (empty) line
+ objects.pop()
+
+ # objects = [[ID, X, Y, W, H], ... ]
+ objects = list(map(lambda x: x.split(","), objects))
+ objects = list(map(lambda x: SVGObject(x), objects))
+
+ ys = list()
+ for o in objects:
+ if o.is_path() and o.h > 2 and o.h < 4 and o.w > 10:
+ ys.append(o.y)
+ bins = np.bincount(ys)
+
+ candidates = list(filter(lambda i: bins[i] > 2, range(len(bins))))
+
+ crop_y_min = np.min(candidates) - 1
+ crop_y_max = np.max(candidates) + 4
+
+ objects_to_delete = list()
+ x_positions = list()
+
+ for o in objects:
+ if (o.is_path or o.is_tspan) and (o.y < crop_y_min or o.y_ > crop_y_max):
+ objects_to_delete.append(o.id)
+ elif o.is_path and o.y >= crop_y_min and o.y_ <= crop_y_max:
+ x_positions.append(o.x)
+ x_positions.append(o.x_)
+
+ crop_x_min = int(np.min(x_positions))
+ crop_x_max = int(np.max(x_positions)) + 1
+
+ objects_to_delete = ",".join(objects_to_delete)
+
+ export_area = f"--export-area={crop_x_min}:{crop_y_min}:{crop_x_max}:{crop_y_max}"
+ select_objects = f"--select={objects_to_delete}"
+
+ subprocess.run(
+ [
+ "xvfb-run",
+ "inkscape",
+ export_area,
+ select_objects,
+ "--verb=EditDelete",
+ "--batch-process",
+ "--export-dpi=600",
+ "-o",
+ outfile,
+ infile,
+ ]
+ )
+
+
+if __name__ == "__main__":
+ main(*sys.argv[1:])