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venv/lib/python3.8/site-packages/pylint/pyreverse/vcgutils.py
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venv/lib/python3.8/site-packages/pylint/pyreverse/vcgutils.py
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# Copyright (c) 2015-2018 Claudiu Popa <pcmanticore@gmail.com>
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# Copyright (c) 2015 Florian Bruhin <me@the-compiler.org>
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# Copyright (c) 2018 ssolanki <sushobhitsolanki@gmail.com>
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# Copyright (c) 2020 Anthony Sottile <asottile@umich.edu>
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# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
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"""Functions to generate files readable with Georg Sander's vcg
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(Visualization of Compiler Graphs).
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You can download vcg at http://rw4.cs.uni-sb.de/~sander/html/gshome.html
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Note that vcg exists as a debian package.
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See vcg's documentation for explanation about the different values that
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maybe used for the functions parameters.
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"""
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ATTRS_VAL = {
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"algos": (
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"dfs",
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"tree",
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"minbackward",
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"left_to_right",
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"right_to_left",
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"top_to_bottom",
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"bottom_to_top",
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"maxdepth",
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"maxdepthslow",
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"mindepth",
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"mindepthslow",
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"mindegree",
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"minindegree",
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"minoutdegree",
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"maxdegree",
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"maxindegree",
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"maxoutdegree",
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),
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"booleans": ("yes", "no"),
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"colors": (
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"black",
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"white",
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"blue",
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"red",
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"green",
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"yellow",
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"magenta",
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"lightgrey",
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"cyan",
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"darkgrey",
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"darkblue",
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"darkred",
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"darkgreen",
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"darkyellow",
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"darkmagenta",
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"darkcyan",
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"gold",
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"lightblue",
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"lightred",
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"lightgreen",
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"lightyellow",
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"lightmagenta",
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"lightcyan",
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"lilac",
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"turquoise",
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"aquamarine",
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"khaki",
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"purple",
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"yellowgreen",
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"pink",
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"orange",
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"orchid",
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),
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"shapes": ("box", "ellipse", "rhomb", "triangle"),
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"textmodes": ("center", "left_justify", "right_justify"),
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"arrowstyles": ("solid", "line", "none"),
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"linestyles": ("continuous", "dashed", "dotted", "invisible"),
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}
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# meaning of possible values:
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# O -> string
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# 1 -> int
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# list -> value in list
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GRAPH_ATTRS = {
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"title": 0,
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"label": 0,
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"color": ATTRS_VAL["colors"],
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"textcolor": ATTRS_VAL["colors"],
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"bordercolor": ATTRS_VAL["colors"],
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"width": 1,
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"height": 1,
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"borderwidth": 1,
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"textmode": ATTRS_VAL["textmodes"],
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"shape": ATTRS_VAL["shapes"],
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"shrink": 1,
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"stretch": 1,
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"orientation": ATTRS_VAL["algos"],
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"vertical_order": 1,
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"horizontal_order": 1,
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"xspace": 1,
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"yspace": 1,
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"layoutalgorithm": ATTRS_VAL["algos"],
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"late_edge_labels": ATTRS_VAL["booleans"],
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"display_edge_labels": ATTRS_VAL["booleans"],
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"dirty_edge_labels": ATTRS_VAL["booleans"],
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"finetuning": ATTRS_VAL["booleans"],
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"manhattan_edges": ATTRS_VAL["booleans"],
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"smanhattan_edges": ATTRS_VAL["booleans"],
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"port_sharing": ATTRS_VAL["booleans"],
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"edges": ATTRS_VAL["booleans"],
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"nodes": ATTRS_VAL["booleans"],
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"splines": ATTRS_VAL["booleans"],
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}
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NODE_ATTRS = {
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"title": 0,
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"label": 0,
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"color": ATTRS_VAL["colors"],
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"textcolor": ATTRS_VAL["colors"],
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"bordercolor": ATTRS_VAL["colors"],
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"width": 1,
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"height": 1,
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"borderwidth": 1,
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"textmode": ATTRS_VAL["textmodes"],
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"shape": ATTRS_VAL["shapes"],
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"shrink": 1,
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"stretch": 1,
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"vertical_order": 1,
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"horizontal_order": 1,
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}
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EDGE_ATTRS = {
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"sourcename": 0,
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"targetname": 0,
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"label": 0,
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"linestyle": ATTRS_VAL["linestyles"],
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"class": 1,
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"thickness": 0,
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"color": ATTRS_VAL["colors"],
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"textcolor": ATTRS_VAL["colors"],
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"arrowcolor": ATTRS_VAL["colors"],
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"backarrowcolor": ATTRS_VAL["colors"],
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"arrowsize": 1,
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"backarrowsize": 1,
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"arrowstyle": ATTRS_VAL["arrowstyles"],
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"backarrowstyle": ATTRS_VAL["arrowstyles"],
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"textmode": ATTRS_VAL["textmodes"],
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"priority": 1,
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"anchor": 1,
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"horizontal_order": 1,
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}
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# Misc utilities ###############################################################
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class VCGPrinter:
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"""A vcg graph writer.
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"""
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def __init__(self, output_stream):
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self._stream = output_stream
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self._indent = ""
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def open_graph(self, **args):
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"""open a vcg graph
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"""
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self._stream.write("%sgraph:{\n" % self._indent)
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self._inc_indent()
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self._write_attributes(GRAPH_ATTRS, **args)
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def close_graph(self):
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"""close a vcg graph
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"""
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self._dec_indent()
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self._stream.write("%s}\n" % self._indent)
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def node(self, title, **args):
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"""draw a node
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"""
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self._stream.write('%snode: {title:"%s"' % (self._indent, title))
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self._write_attributes(NODE_ATTRS, **args)
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self._stream.write("}\n")
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def edge(self, from_node, to_node, edge_type="", **args):
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"""draw an edge from a node to another.
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"""
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self._stream.write(
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'%s%sedge: {sourcename:"%s" targetname:"%s"'
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% (self._indent, edge_type, from_node, to_node)
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)
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self._write_attributes(EDGE_ATTRS, **args)
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self._stream.write("}\n")
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# private ##################################################################
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def _write_attributes(self, attributes_dict, **args):
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"""write graph, node or edge attributes
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"""
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for key, value in args.items():
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try:
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_type = attributes_dict[key]
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except KeyError:
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raise Exception(
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"""no such attribute %s
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possible attributes are %s"""
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% (key, attributes_dict.keys())
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)
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if not _type:
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self._stream.write('%s%s:"%s"\n' % (self._indent, key, value))
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elif _type == 1:
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self._stream.write("%s%s:%s\n" % (self._indent, key, int(value)))
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elif value in _type:
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self._stream.write("%s%s:%s\n" % (self._indent, key, value))
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else:
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raise Exception(
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"""value %s isn\'t correct for attribute %s
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correct values are %s"""
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% (value, key, _type)
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)
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def _inc_indent(self):
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"""increment indentation
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"""
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self._indent = " %s" % self._indent
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def _dec_indent(self):
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"""decrement indentation
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"""
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self._indent = self._indent[:-2]
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