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from __future__ import print_function
import argparse
import sys
import graphviz
from ._discover import findMachines
def _gvquote(s):
return '"{}"'.format(s.replace('"', r'\"'))
def _gvhtml(s):
return '<{}>'.format(s)
def elementMaker(name, *children, **attrs):
"""
Construct a string from the HTML element description.
"""
formattedAttrs = ' '.join('{}={}'.format(key, _gvquote(str(value)))
for key, value in sorted(attrs.items()))
formattedChildren = ''.join(children)
return u'<{name} {attrs}>{children}</{name}>'.format(
name=name,
attrs=formattedAttrs,
children=formattedChildren)
def tableMaker(inputLabel, outputLabels, port, _E=elementMaker):
"""
Construct an HTML table to label a state transition.
"""
colspan = {}
if outputLabels:
colspan['colspan'] = str(len(outputLabels))
inputLabelCell = _E("td",
_E("font",
inputLabel,
face="menlo-italic"),
color="purple",
port=port,
**colspan)
pointSize = {"point-size": "9"}
outputLabelCells = [_E("td",
_E("font",
outputLabel,
**pointSize),
color="pink")
for outputLabel in outputLabels]
rows = [_E("tr", inputLabelCell)]
if outputLabels:
rows.append(_E("tr", *outputLabelCells))
return _E("table", *rows)
def makeDigraph(automaton, inputAsString=repr,
outputAsString=repr,
stateAsString=repr):
"""
Produce a L{graphviz.Digraph} object from an automaton.
"""
digraph = graphviz.Digraph(graph_attr={'pack': 'true',
'dpi': '100'},
node_attr={'fontname': 'Menlo'},
edge_attr={'fontname': 'Menlo'})
for state in automaton.states():
if state is automaton.initialState:
stateShape = "bold"
fontName = "Menlo-Bold"
else:
stateShape = ""
fontName = "Menlo"
digraph.node(stateAsString(state),
fontame=fontName,
shape="ellipse",
style=stateShape,
color="blue")
for n, eachTransition in enumerate(automaton.allTransitions()):
inState, inputSymbol, outState, outputSymbols = eachTransition
thisTransition = "t{}".format(n)
inputLabel = inputAsString(inputSymbol)
port = "tableport"
table = tableMaker(inputLabel, [outputAsString(outputSymbol)
for outputSymbol in outputSymbols],
port=port)
digraph.node(thisTransition,
label=_gvhtml(table), margin="0.2", shape="none")
digraph.edge(stateAsString(inState),
'{}:{}:w'.format(thisTransition, port),
arrowhead="none")
digraph.edge('{}:{}:e'.format(thisTransition, port),
stateAsString(outState))
return digraph
def tool(_progname=sys.argv[0],
_argv=sys.argv[1:],
_syspath=sys.path,
_findMachines=findMachines,
_print=print):
"""
Entry point for command line utility.
"""
DESCRIPTION = """
Visualize automat.MethodicalMachines as graphviz graphs.
"""
EPILOG = """
You must have the graphviz tool suite installed. Please visit
http://www.graphviz.org for more information.
"""
if _syspath[0]:
_syspath.insert(0, '')
argumentParser = argparse.ArgumentParser(
prog=_progname,
description=DESCRIPTION,
epilog=EPILOG)
argumentParser.add_argument('fqpn',
help="A Fully Qualified Path name"
" representing where to find machines.")
argumentParser.add_argument('--quiet', '-q',
help="suppress output",
default=False,
action="store_true")
argumentParser.add_argument('--dot-directory', '-d',
help="Where to write out .dot files.",
default=".automat_visualize")
argumentParser.add_argument('--image-directory', '-i',
help="Where to write out image files.",
default=".automat_visualize")
argumentParser.add_argument('--image-type', '-t',
help="The image format.",
choices=graphviz.FORMATS,
default='png')
argumentParser.add_argument('--view', '-v',
help="View rendered graphs with"
" default image viewer",
default=False,
action="store_true")
args = argumentParser.parse_args(_argv)
explicitlySaveDot = (args.dot_directory
and (not args.image_directory
or args.image_directory != args.dot_directory))
if args.quiet:
def _print(*args):
pass
for fqpn, machine in _findMachines(args.fqpn):
_print(fqpn, '...discovered')
digraph = machine.asDigraph()
if explicitlySaveDot:
digraph.save(filename="{}.dot".format(fqpn),
directory=args.dot_directory)
_print(fqpn, "...wrote dot into", args.dot_directory)
if args.image_directory:
deleteDot = not args.dot_directory or explicitlySaveDot
digraph.format = args.image_type
digraph.render(filename="{}.dot".format(fqpn),
directory=args.image_directory,
view=args.view,
cleanup=deleteDot)
if deleteDot:
msg = "...wrote image into"
else:
msg = "...wrote image and dot into"
_print(fqpn, msg, args.image_directory)
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