import functools

import tempfile

import cppyy

import itertools

import sys

SVGConf = None

def wrap_GraphIO(func):

@functools.wraps(func)

def wrapper(*args, **kwargs):

logger = cppyy.gbl.ogdf.GraphIO.logger

levels = {

l: getattr(logger, l)()

for l in [

"globalLogLevel",

"globalInternalLibraryLogLevel",

"globalMinimumLogLevel",

"localLogLevel",

]

}

logMode = logger.localLogMode()

statMode = logger.globalStatisticMode()

ret = stdout = stderr = None

try:

logger.localLogMode(type(logger).LogMode.Global)

logger.globalStatisticMode(False)

for l in levels:

getattr(logger, l)(type(logger).Level.Minor)

cppyy.gbl.ogdf_pythonization.BeginCaptureStdout()

cppyy.gbl.ogdf_pythonization.BeginCaptureStderr()

try:

ret = func(*args, **kwargs)

finally:

stdout = cppyy.gbl.ogdf_pythonization.EndCaptureStdout().decode("utf8", "replace").strip()

stderr = cppyy.gbl.ogdf_pythonization.EndCaptureStderr().decode("utf8", "replace").strip()

finally:

logger.localLogMode(logMode)

logger.globalStatisticMode(statMode)

for l, v in levels.items():

getattr(logger, l)(v)

if stdout and logger.is_lout(logger.Level.Medium):

print(stdout)

if stderr:

print(stderr, file=sys.stderr)

if not ret:

args = ', '.join(itertools.chain(map(repr, args), (f"{k}={v!r}" for k, v in kwargs.items())))

msg = f"GraphIO.{func.__name__}({args}) failed"

if stdout or stderr:

msg += ":"

if stdout:

msg += "\n" + stdout

if stderr:

msg += "\n" + stderr

else:

msg += " for unknown reason. Does the file exist?"

raise IOError(msg)

else:

return ret

wrapper.__overload__ = func.__overload__

return wrapper

def renderGraph(G):

cppyy.include("ogdf/planarity/PlanarizationGridLayout.h")

ogdf = cppyy.gbl.ogdf

GA = ogdf.GraphAttributes(G, ogdf.GraphAttributes.all)

ogdf.PlanarizationGridLayout().call(GA)

for n in G.nodes:

GA.label[n] = str(n.index())

return GA

def renderClusterGraph(CG):

cppyy.include("ogdf/cluster/ClusterPlanarizationLayout.h")

ogdf = cppyy.gbl.ogdf

CGA = ogdf.ClusterGraphAttributes(CG, ogdf.ClusterGraphAttributes.all)

cppyy.gbl.ogdf_pythonization.BeginCaptureStdout()

try:

ogdf.ClusterPlanarizationLayout().call(CG.getGraph(), CGA, CG)

finally:

stdout = cppyy.gbl.ogdf_pythonization.EndCaptureStdout().decode("utf8", "replace").strip()

for n in CG.getGraph().nodes:

CGA.label[n] = str(n.index())

return CGA

def GraphAttributes_to_svg(self):

global SVGConf

if SVGConf is None:

SVGConf = cppyy.gbl.ogdf.GraphIO.SVGSettings()

SVGConf.margin(50)

SVGConf.bezierInterpolation(False)

# SVGConf.curviness(0.1)

with tempfile.NamedTemporaryFile("w+t", suffix=".svg", prefix="ogdf-python-") as f:

os = cppyy.gbl.std.ofstream(f.name)

cppyy.gbl.ogdf.GraphIO.drawSVG(self, os, SVGConf)

os.close()

return f.read()

def Graph_to_svg(self):

return GraphAttributes_to_svg(renderGraph(self))

def ClusterGraph_to_svg(self):

return GraphAttributes_to_svg(renderClusterGraph(self))