~abentley/bzrtools/bzrtools.dev

#!/usr/bin/env python2.4

from subprocess import Popen, PIPE

from urllib import urlencode

from xml.sax.saxutils import escape

import os.path

import errno

import tempfile

import shutil

mail_map = {}

class NoDot(Exception):

    def __init__(self):

        Exception.__init__(self, "Can't find dot!")

class NoRsvg(Exception):

    def __init__(self):

        Exception.__init__(self, "Can't find rsvg!")

class Node(object):

    def __init__(self, name, color=None, label=None, rev_id=None,

                 cluster=None):

        self.name = name

        self.color = color

        self.label = label

        self.committer = None

        self.rev_id = rev_id

        self.node_style = []

        self.cluster = cluster

    def get_committer(self):

        if self.committer is not None:

            if '@' in self.committer:

                try:

                    return mail_map[self.committer]

                except KeyError:

                    pass

            return self.committer

        elif self.rev_id is not None:

            try:

                first_segment = '-'.join(self.rev_id.split('-')[:-2])\

                    .strip(' ')

            except ValueError:

                first_segment = []

            if '@' in first_segment:

                try:

                    return mail_map[first_segment]

                except KeyError:

                    return first_segment

    def get_label(self):

        label = None

        committer = self.get_committer()

        if committer is not None:

            label = "%s\\n%s" % (self.name, committer)

        return label

    def define(self):

        attributes = []

        style = []

        if self.color is not None:

            attributes.append('fillcolor="%s"' % self.color)

            style.append('filled')

        style.extend(self.node_style)

        if len(style) > 0:

            attributes.append('style="%s"' % ",".join(style))

        label = self.get_label()

        if label is not None:

            attributes.append('label="%s"' % label)

        attributes.append('shape="box"')

        if len(attributes) > 0:

            return '%s[%s]' % (self.name, " ".join(attributes))

    def __str__(self):

        return self.name

def dot_output(relations):

    defined = set()

    yield "digraph G\n"

    yield "{\n"

    clusters = set()

    def rel_appropriate(start, end, cluster):

        if cluster is None:

            return start.cluster is None or end.cluster is None

        else:

            return start.cluster==cluster and end.cluster==cluster

    for (start, end) in relations:

        if start.cluster is not None:

            clusters.add(start.cluster)

        if end.cluster is not None:

            clusters.add(end.cluster)

    clusters = list(clusters)

    clusters.append(None)

    for index, cluster in enumerate(clusters):

        if cluster is not None:

            yield "subgraph cluster_%s\n" % index

            yield "{\n"

            yield '    label="%s"\n' % cluster

        for (start, end) in relations:

            if start.name not in defined and start.cluster == cluster:

                defined.add(start.name)

                my_def = start.define()

                if my_def is not None:

                    yield "    %s;\n" % my_def

            if end.name not in defined and end.cluster == cluster:

                defined.add(end.name)

                my_def = end.define()

                if my_def is not None:

                    yield "    %s;\n" % my_def

            if rel_appropriate(start, end, cluster):

                yield "    %s->%s;\n" % (start.name, end.name)

        if cluster is not None:

            yield "}\n"

    yield "}\n"

def invoke_dot_aa(input, out_file, file_type='png'):

    """\

    Produce antialiased Dot output, invoking rsvg on an intermediate file.

    rsvg only supports png, jpeg and .ico files."""

    tempdir = tempfile.mkdtemp()

    try:

        temp_file = os.path.join(tempdir, 'temp.svg')

        invoke_dot(input, temp_file, 'svg')

        cmdline = ['rsvg', temp_file, out_file]

        try:

            rsvg_proc = Popen(cmdline)

        except OSError, e:

            if e.errno == errno.ENOENT:

                raise NoRsvg()

        status = rsvg_proc.wait()

    finally:

        shutil.rmtree(tempdir)

    return status

def invoke_dot(input, out_file=None, file_type='svg', antialias=None):

    cmdline = ['dot', '-T%s' % file_type]

    if out_file is not None:

        cmdline.extend(('-o', out_file))

    try:

        dot_proc = Popen(cmdline, stdin=PIPE)

    except OSError, e:

        if e.errno == errno.ENOENT:

            raise NoDot()

        else:

            raise

    for line in input:

        dot_proc.stdin.write(line)

    dot_proc.stdin.close()

    return dot_proc.wait()