From b34b948f0ae88fa632b196d5fb0682b552555764 Mon Sep 17 00:00:00 2001
From: Michael Schwarz <michi.schwarz@gmail.com>
Date: Thu, 6 Aug 2015 16:19:06 +0200
Subject: Reworked Inkscape command line generation.

The old version was brittle and made conditional operations hard.
---
 support/inkscape/inkscape.py | 120 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 support/inkscape/inkscape.py

(limited to 'support/inkscape/inkscape.py')

diff --git a/support/inkscape/inkscape.py b/support/inkscape/inkscape.py
new file mode 100644
index 0000000..09e7a7b
--- /dev/null
+++ b/support/inkscape/inkscape.py
@@ -0,0 +1,120 @@
+import os
+import xml.etree.ElementTree as etree
+from lib import util
+
+
+def get_inkscape_layers(svg_path):
+	document = etree.parse(svg_path)
+	
+	def iter_layers():
+		nodes = document.findall(
+			'{http://www.w3.org/2000/svg}g[@{http://www.inkscape.org/namespaces/inkscape}groupmode="layer"]')
+		
+		for i in nodes:
+			inkscape_name = i.get('{http://www.inkscape.org/namespaces/inkscape}label').strip()
+			
+			if inkscape_name.endswith(']'):
+				dxf_name, args = inkscape_name[:-1].rsplit('[', 1)
+				
+				dxf_name = dxf_name.strip()
+				args = args.strip()
+				
+				use_paths = 'p' in args
+			else:
+				use_paths = False
+				dxf_name = inkscape_name
+			
+			yield Layer(inkscape_name, dxf_name, use_paths = use_paths)
+	
+	return list(iter_layers())
+
+
+def _inkscape(svg_path, verbs):
+	def iter_args():
+		yield os.environ['INKSCAPE']
+		
+		for i in verbs:
+			yield '--verb'
+			yield i
+		
+		yield svg_path
+	
+	util.command(list(iter_args()))
+
+
+class Layer(object):
+	def __init__(self, inkscape_name, export_name, use_paths):
+		self.inkscape_name = inkscape_name
+		self.export_name = export_name
+		self.use_paths = use_paths
+
+
+class InkscapeCommandLine(object):
+	def __init__(self, path):
+		self._path = path
+		self._layers = get_inkscape_layers(path)
+		self._current_layer_index = None
+		self._verbs = []
+	
+	def apply_to_document(self, *verb):
+		self._verbs.extend(verb)
+	
+	def apply_to_layer(self, layer, *verb):
+		self._go_to_layer(layer)
+		self.apply_to_document(*verb)
+	
+	def select_all_in_layer(self, layer):
+		self.apply_to_layer(layer, 'EditSelectAll')
+	
+	def apply_to_layer_content(self, layer, *verbs):
+		self.select_all_in_layer(layer)
+		self.apply_to_document(*verbs)
+	
+	def _go_to_layer(self, layer, with_selection = False):
+		if self._current_layer_index is None:
+			# Initialize to a known state.
+			self._current_layer_index = len(self._layers) - 1
+			self._go_to_layer(self._layers[0])
+		
+		target_index = self._layers.index(layer)
+		
+		while True:
+			if self._current_layer_index < target_index:
+				self.apply_to_document('LayerMoveToNext' if with_selection else 'LayerNext')
+				self._current_layer_index += 1
+			elif self._current_layer_index > target_index:
+				self.apply_to_document('LayerMoveToPrev' if with_selection else 'LayerPrev')
+				self._current_layer_index -= 1
+			else:
+				break
+	
+	def duplicate_layer(self, layer):
+		self.apply_to_layer(layer, 'LayerDuplicate')
+		
+		# Inkscape 0.91 places a duplicated layer above (after) the selected one and selects the new layer.
+		new_layer = Layer(layer.inkscape_name + ' copy', layer.export_name, layer.use_paths)
+		self._current_layer_index += 1
+		self._layers.insert(self._current_layer_index, new_layer)
+		
+		return new_layer
+	
+	def delete_layer(self, layer):
+		self.apply_to_layer(layer, 'LayerDelete')
+		
+		# Inkscape 0.91 selects the layer above (after) the deleted layer.
+		del self._layers[self._current_layer_index]
+	
+	def clear_layer(self, layer):
+		self.select_all_in_layer(layer)
+		self.apply_to_document('EditDelete')
+	
+	def move_content(self, source_layer, target_layer):
+		self.select_all_in_layer(source_layer)
+		self._go_to_layer(target_layer, True)
+	
+	def run(self):
+		_inkscape(self._path, self._verbs)
+	
+	@property
+	def layers(self):
+		return list(self._layers)
-- 
cgit