Add apply palette extension (#2738)

* add apply palette extension
* thread catalog: apply palette: do not overwrite cutwork settings

1 files changed, 39 insertions, 0 deletions

diff --git a/lib/extensions/apply_palette.py b/lib/extensions/apply_palette.py
new file mode 100644
index 00000000..ce6c8f5c
--- /dev/null
+++ b/lib/extensions/apply_palette.py
@@ -0,0 +1,39 @@
+# Authors: see git history
+#
+# Copyright (c) 2024 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
+from ..elements import FillStitch
+from ..threads import ThreadCatalog, ThreadColor
+from .base import InkstitchExtension
+
+
+class ApplyPalette(InkstitchExtension):
+    '''
+    Applies colors of a color palette to elements
+    '''
+    def __init__(self, *args, **kwargs):
+        InkstitchExtension.__init__(self, *args, **kwargs)
+        self.arg_parser.add_argument("-o", "--tabs")
+        self.arg_parser.add_argument("-t", "--palette", type=str, default=None, dest="palette")
+
+    def effect(self):
+        # Remove selection, we want all the elements in the document
+        self.svg.selection.clear()
+
+        if not self.get_elements():
+            return
+
+        palette_name = self.options.palette
+        palette = ThreadCatalog().get_palette_by_name(palette_name)
+
+        # Iterate through the color blocks to apply colors
+        for element in self.elements:
+            nearest_color = palette.nearest_color(ThreadColor(element.color))
+            if isinstance(element, FillStitch):
+                element.node.style['fill'] = nearest_color.to_hex_str()
+            else:
+                element.node.style['stroke'] = nearest_color.to_hex_str()
+
+        metadata = self.get_inkstitch_metadata()
+        metadata['thread-palette'] = palette_name