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import string
MOVE_TO = 0
LINE_TO = 1
CURVE_TO = 2
# these are not actually saved
HLINE_TO = 3
VLINE_TO = 4
SMOOTHCURVE_TO = 5
CLOSE = 6
class Component:
def __init__(self, type, point1=None, point2=None, point3=None):
self.type = type
self.point1 = point1
self.point2 = point2
self.point3 = point3
def dump(self):
if self.type == MOVE_TO:
print "Move To", self.point1
elif self.type == LINE_TO:
print "Line To", self.point1
elif self.type == CURVE_TO:
print "Curve To", self.point1, self.point2, self.point3
elif self.type == CLOSE:
print "Close"
def chomp(bpath):
while bpath and bpath[0] in ' \t\n\r,':
bpath = bpath[1:]
return bpath
def read_num(str):
num = ''
while str and str[0] in '0123456789.+-':
num = num + str[0]
str = str[1:]
return string.atof(num), chomp(str)
def parse_bpath(bpath):
p = []
last_open = (0, 0)
last_point = (0, 0)
last_control = (0,0)
last_type = MOVE_TO
last_relative = 0
bpath = chomp(bpath)
while bpath:
# grok new commands
print bpath
if bpath[0] == 'M':
bpath = chomp(bpath[1:])
last_type = MOVE_TO
last_relative = 0
elif bpath[0] == 'm':
bpath = chomp(bpath[1:])
last_type = MOVE_TO
last_relative = 1
elif bpath[0] == 'L':
bpath = chomp(bpath[1:])
last_type = LINE_TO
last_relative = 0
elif bpath[0] == 'l':
bpath = chomp(bpath[1:])
last_type = LINE_TO
last_relative = 1
elif bpath[0] == 'H':
bpath = chomp(bpath[1:])
last_type = HLINE_TO
last_relative = 0
elif bpath[0] == 'h':
bpath = chomp(bpath[1:])
last_type = HLINE_TO
last_relative = 1
elif bpath[0] == 'V':
bpath = chomp(bpath[1:])
last_type = VLINE_TO
last_relative = 0
elif bpath[0] == 'v':
bpath = chomp(bpath[1:])
last_type = VLINE_TO
last_relative = 1
elif bpath[0] == 'C':
bpath = chomp(bpath[1:])
last_type = CURVE_TO
last_relative = 0
last_smooth = 0
elif bpath[0] == 'c':
bpath = chomp(bpath[1:])
last_type = CURVE_TO
last_relative = 1
last_smooth = 0
elif bpath[0] == 'S':
bpath = chomp(bpath[1:])
last_type = SMOOTHCURVE_TO
last_relative = 0
elif bpath[0] == 's':
bpath = chomp(bpath[1:])
last_type = SMOOTHCURVE_TO
last_relative = 1
elif bpath[0] in 'Zz':
bpath = chomp(bpath[1:])
last_type = CLOSE
last_relative = 0
elif bpath[0] not in '0123456789.+-':
raise TypeError, "unexpected input"
if last_type == MOVE_TO:
x, bpath = read_num(bpath)
y, bpath = read_num(bpath)
if last_relative:
x = x + last_point[0]
y = y + last_point[1]
last_point = (x, y)
last_control = last_point
last_open = last_point
p.append(Component(MOVE_TO, last_point))
elif last_type == LINE_TO:
x, bpath = read_num(bpath)
y, bpath = read_num(bpath)
if last_relative:
x = x + last_point[0]
y = y + last_point[1]
last_point = (x, y)
last_control = last_point
p.append(Component(LINE_TO, last_point))
elif last_type == HLINE_TO:
x, bpath = read_num(bpath)
if last_relative:
x = x + last_point[0]
last_point = (x, last_point[1])
last_control = last_point
p.append(Component(LINE_TO, last_point))
elif last_type == VLINE_TO:
y, bpath = read_num(bpath)
if last_relative:
y = y + last_point[1]
last_point = (last_point[0], y)
last_control = last_point
p.append(Component(LINE_TO, last_point))
elif last_type == CURVE_TO:
x1, bpath = read_num(bpath)
y1, bpath = read_num(bpath)
x2, bpath = read_num(bpath)
y2, bpath = read_num(bpath)
x3, bpath = read_num(bpath)
y3, bpath = read_num(bpath)
if last_relative:
x1 = x1 + last_point[0]
y1 = y1 + last_point[1]
x2 = x2 + last_point[0]
y2 = y2 + last_point[1]
x3 = x3 + last_point[0]
y3 = y3 + last_point[1]
last_point = (x3, y3)
last_control = (x2, y2)
p.append(Component(CURVE_TO, (x1,y1),(x2,y2),(x3,y3)))
elif last_type == SMOOTHCURVE_TO:
x2, bpath = read_num(bpath)
y2, bpath = read_num(bpath)
x3, bpath = read_num(bpath)
y3, bpath = read_num(bpath)
if last_relative:
x2 = x2 + last_point[0]
y2 = y2 + last_point[1]
x3 = x3 + last_point[0]
y3 = y3 + last_point[1]
x1 = 2 * last_point[0] - last_control[0]
y1 = 2 * last_point[1] - last_control[1]
last_point = (x3, y3)
last_control = (x2, y2)
p.append(Component(CURVE_TO, (x1,y1),(x2,y2),(x3,y3)))
elif last_type == CLOSE:
if last_point != last_open:
p.append(Component(LINE_TO, last_open))
last_point = last_open
last_control = last_point
p.append(Component(CLOSE))
bpath = chomp(bpath)
return p
def print_bpath(bpath):
p = parse_bpath(bpath)
map(Component.dump, p)
if __name__ == '__main__':
import sys
if len(sys.argv) > 1:
print_bpath(sys.argv[1])
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