view hgext/beautifygraph.py @ 43105:649d3ac37a12

py3: define and use pycompat.iteritems() for hgext/

.iteritems() -> .items() is the last source transform being performed.
But it is also the most widely used.

This commit adds a pycompat.iteritems symbol and imports it in place
of .iteritems() for usage in hgext/. I chose to stop at just hgext/
because the patch will be large and it is an easy boundary to stop at
since we can disable source transformation on a per-package basis.

There are places where the type does implement items() and we could
call items() directly. However, this would require critical thought
and I thought it would be easier to just blindly change the code. We
know which call sites need to be audited in the future because they
have "pycompat.iteritems."

With this change, we no longer perform source transformation on
hgext!

Differential Revision: https://phab.mercurial-scm.org/D7014

# -*- coding: UTF-8 -*-
# beautifygraph.py - improve graph output by using Unicode characters
#
# Copyright 2018 John Stiles <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''beautify log -G output by using Unicode characters (EXPERIMENTAL)

   A terminal with UTF-8 support and monospace narrow text are required.
'''

from __future__ import absolute_import

from mercurial.i18n import _
from mercurial import (
    encoding,
    extensions,
    graphmod,
    pycompat,
    templatekw,
)

# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = b'ships-with-hg-core'


def prettyedge(before, edge, after):
    if edge == b'~':
        return b'\xE2\x95\xA7'  # U+2567 ╧
    if edge == b'/':
        return b'\xE2\x95\xB1'  # U+2571 ╱
    if edge == b'-':
        return b'\xE2\x94\x80'  # U+2500 ─
    if edge == b'|':
        return b'\xE2\x94\x82'  # U+2502 │
    if edge == b':':
        return b'\xE2\x94\x86'  # U+2506 ┆
    if edge == b'\\':
        return b'\xE2\x95\xB2'  # U+2572 ╲
    if edge == b'+':
        if before == b' ' and not after == b' ':
            return b'\xE2\x94\x9C'  # U+251C ├
        if after == b' ' and not before == b' ':
            return b'\xE2\x94\xA4'  # U+2524 ┤
        return b'\xE2\x94\xBC'  # U+253C ┼
    return edge


def convertedges(line):
    line = b' %s ' % line
    pretty = []
    for idx in pycompat.xrange(len(line) - 2):
        pretty.append(
            prettyedge(
                line[idx : idx + 1],
                line[idx + 1 : idx + 2],
                line[idx + 2 : idx + 3],
            )
        )
    return b''.join(pretty)


def getprettygraphnode(orig, *args, **kwargs):
    node = orig(*args, **kwargs)
    if node == b'o':
        return b'\xE2\x97\x8B'  # U+25CB ○
    if node == b'@':
        return b'\xE2\x97\x8D'  # U+25CD ◍
    if node == b'*':
        return b'\xE2\x88\x97'  # U+2217 ∗
    if node == b'x':
        return b'\xE2\x97\x8C'  # U+25CC ◌
    if node == b'_':
        return b'\xE2\x95\xA4'  # U+2564 ╤
    return node


def outputprettygraph(orig, ui, graph, *args, **kwargs):
    (edges, text) = zip(*graph)
    graph = zip([convertedges(e) for e in edges], text)
    return orig(ui, graph, *args, **kwargs)


def extsetup(ui):
    if ui.plain(b'graph'):
        return

    if encoding.encoding != b'UTF-8':
        ui.warn(_(b'beautifygraph: unsupported encoding, UTF-8 required\n'))
        return

    if r'A' in encoding._wide:
        ui.warn(
            _(
                b'beautifygraph: unsupported terminal settings, '
                b'monospace narrow text required\n'
            )
        )
        return

    extensions.wrapfunction(graphmod, b'outputgraph', outputprettygraph)
    extensions.wrapfunction(templatekw, b'getgraphnode', getprettygraphnode)