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'''
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
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