1 files changed, 139 insertions, 0 deletions
diff --git a/share/extensions/PathData.py b/share/extensions/PathData.py
new file mode 100644
index 000000000..762f97173
--- /dev/null
+++ b/share/extensions/PathData.py
@@ -0,0 +1,139 @@
+'''
+Copyright (C) 2011 Felipe Correa da Silva Sanches <juca@members.fsf.org>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+'''
+
+class PathData():
+	def __init__ (self, d):
+		self.data = self.parse(d)
+
+	def transform_coordinate_values(self, callback, units_per_em, baseline):
+
+		for d in range(len(self.data)):
+			cmd = self.data[d][0]
+			relative = (cmd.lower()==cmd)
+
+			if cmd.lower() in "mtlsqc":
+				for params in range(len(self.data[d][1])):
+					for values in range(len(self.data[d][1][params])):
+
+						if d==0 and params==0 and values==0:
+							self.data[d][1][params][values] = callback(self.data[d][1][params][values], units_per_em, baseline, False)
+						else:
+							self.data[d][1][params][values] = callback(self.data[d][1][params][values], units_per_em, baseline, relative)
+
+		return self.encode()
+		
+	def get_coord_pairs(self, num_pairs, tokens, i, multiple=True):
+		pairs = []
+		for _ in range(num_pairs):
+			x,y = tokens[i].split(",")
+			pairs.append((float(x), float(y)))
+			i+=1
+		coords = [pairs]
+
+		while multiple:
+			try:
+				pairs = []
+				for _ in range(num_pairs):
+					x,y = tokens[i].split(",")
+					pairs.append((float(x), float(y)))
+					i+=1
+				coords.append(pairs)
+			except:
+				return coords, i
+		return coords, i
+
+	def get_coords(self, num_values, tokens, i, multiple=True):
+		values = []
+		for _ in range(num_values):
+			values.append(float(tokens[i]))
+			i+=1
+		coords = [values]
+
+		while multiple:
+			try:
+				values = []
+				for _ in range(num_values):
+					values.append(float(tokens[i]))
+					i+=1
+				coords.append(values)
+			except:
+				return coords, i
+		return coords, i
+
+	def get_arc_coords(tokens, i):
+		return [] #TODO
+
+	def get_tokens(self, d):
+		tokens = []
+		for t in d.split(" "):
+			if len(t):
+				if len(t)>1 and t[0].lower() in "hvmtlsqcaz":
+					tokens.append(t[0])
+					tokens.append(t[1:])
+				else:
+					tokens.append(t)
+		return tokens
+
+	def parse(self, d):
+		data = []
+		tokens = self.get_tokens(d)
+		i=0
+		while i < len(tokens):
+			command = tokens[i]
+			i+=1
+			if command in ["z","Z"]:
+				data.append((command, None))
+				i+=1
+			elif command in ["h","H", "v", "V"]:
+				coords, i = self.get_coords(1, tokens, i)
+				data.append((command, coords))
+			elif command in ["a","A"]:
+				coords, i = self.get_arc_coords(tokens, i)
+				data.append((command, coords))
+			elif command in ["m","M", "t", "T", "l", "L"]:
+				coords, i = self.get_coord_pairs(1, tokens, i)
+				data.append((command, coords))
+			elif command in ["s","S", "q", "Q"]:
+				coords, i = self.get_coord_pairs(2, tokens, i)
+				data.append((command, coords))
+			elif command in ["c","C"]:
+				coords, i = self.get_coord_pairs(3, tokens, i)
+				data.append((command, coords))
+		return data
+
+	def encode(self, data=None):
+		if data is None:
+			data = self.data
+
+		d = ""
+		for cmd, coords in data:
+			d += cmd + " "
+			if cmd.lower() in "mtlsqc":
+				for c in coords:
+					for x,y in c:
+						d += str(x) + "," + str(y) + " "
+			elif cmd.lower() == "z":
+				d += cmd
+			elif cmd.lower() in "hv":
+				for values in coords:
+					for v in values:
+						d += str(v) + " "
+			elif cmd.lower() == "a":
+				pass #TODO
+		return d
+