def parse_postscript(fullString):
'''
Takes the usable part of the ps file (without newlines) and chops it up.
intput: takes full string from get_postscript function
output: generates a list of discrete commands for every object found.
if additional primitives are foudn, it outputs those too.
'''
commandList = []
# because the last possible parsable character is an f, warning bad naming convention!
commandListString = fullString.split(" f")[:-1]
for item in commandListString:
commandList.append(regex_this_string(item))
# plotList takes the last chunk, this seems to be the primitive path drawing (ie not shapes)
# should send extra regex here.
plotListString = fullString.split(" f")[-1]
plotListString = fix_plotListString(plotListString)
plotList = plotListString.split("Q")[:-1]
finalPlotList = []
for item in plotList:
finalPlotList.append(regex_plotListString(item))
return commandList, finalPlotList
def regex_plotListString(plotListString):
'''this function takes the second half of the instructions extracted from the ps
The function exists only because supporting more commands was a bit of an afterthought,
it requires some fixing by fix_plotListString due to zealous string chopping at the start.
It feels a little wonky, and it is, but this gives me some idea of what to do next.
Ultimately the initial parse pass should take care of both Paths and Shapes.
intput: unformated primitive plot instructions like lines/dashes/circles
output: after applying regular expressions the instructions are stored in a list and
can be used similarly to c;eanStringList
'''
plotListString = fix_plotListString(plotListString)
primitive_commands = re.compile(r"""
[0-9.]+\s[w] # value w = line width, and accepts int and floats
| [-0-9.]+\s[JjmM] # value J = set line cap
# value j = set line join
# value M = set miter limit
| [-0-9.]+\s[-0-9.]+\s[ml] # value value m = move to
# value value l = line to
| [[][-0-9. ]*[]][-0-9. ]+[d]\s\b # [optional value] value d =
| [q][-0-9. ]+\s[c][m] # q value value value value cm =
| [-0-9. ]+\s[c] # value*6 c = curve to
| [S] # S = set stroke
| [Q] # Q = seems to be a delimter.
| [h] # h = closePath();
""", re.VERBOSE)
m = primitive_commands.findall(plotListString)
mclean = []
for i in m:
mclean.append( i.lstrip())
return mclean