# color.py color output for the status and qseries commands

#

# Copyright (C) 2007 Kevin Christen <kevin.christen@gmail.com>

#

# This program is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License as published by the

# Free Software Foundation; either version 2 of the License, or (at your

# option) any later version.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General

# Public License for more details.

#

# You should have received a copy of the GNU General Public License along

# with this program; if not, write to the Free Software Foundation, Inc.,

# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

'''colorize output from some commands

This extension modifies the status and resolve commands to add color to their

output to reflect file status, the qseries command to add color to reflect

patch status (applied, unapplied, missing), and to diff-related

commands to highlight additions, removals, diff headers, and trailing

whitespace.

Other effects in addition to color, like bold and underlined text, are

also available. Effects are rendered with the ECMA-48 SGR control

function (aka ANSI escape codes). This module also provides the

render_text function, which can be used to add effects to any text.

Default effects may be overridden from the .hgrc file::

  [color]

  status.modified = blue bold underline red_background

  status.added = green bold

  status.removed = red bold blue_background

  status.deleted = cyan bold underline

  status.unknown = magenta bold underline

  status.ignored = black bold

  # 'none' turns off all effects

  status.clean = none

  status.copied = none

  qseries.applied = blue bold underline

  qseries.unapplied = black bold

  qseries.missing = red bold

  diff.diffline = bold

  diff.extended = cyan bold

  diff.file_a = red bold

  diff.file_b = green bold

  diff.hunk = magenta

  diff.deleted = red

  diff.inserted = green

  diff.changed = white

  diff.trailingwhitespace = bold red_background

  resolve.unresolved = red bold

  resolve.resolved = green bold

  bookmarks.current = green

'''

import os, sys

from mercurial import commands, dispatch, extensions

from mercurial.i18n import _

# start and stop parameters for effects

_effects = {'none': 0, 'black': 30, 'red': 31, 'green': 32, 'yellow': 33,

            'blue': 34, 'magenta': 35, 'cyan': 36, 'white': 37, 'bold': 1,

            'italic': 3, 'underline': 4, 'inverse': 7,

            'black_background': 40, 'red_background': 41,

            'green_background': 42, 'yellow_background': 43,

            'blue_background': 44, 'purple_background': 45,

            'cyan_background': 46, 'white_background': 47}

_styles = {'grep.match': 'red bold',

           'diff.changed': 'white',

           'diff.deleted': 'red',

           'diff.diffline': 'bold',

           'diff.extended': 'cyan bold',

           'diff.file_a': 'red bold',

           'diff.file_b': 'green bold',

           'diff.hunk': 'magenta',

           'diff.inserted': 'green',

           'diff.trailingwhitespace': 'bold red_background',

           'diffstat.deleted': 'red',

           'diffstat.inserted': 'green',

           'log.changeset': 'yellow',

           'resolve.resolved': 'green bold',

           'resolve.unresolved': 'red bold',

           'status.added': 'green bold',

           'status.clean': 'none',

           'status.copied': 'none',

           'status.deleted': 'cyan bold underline',

           'status.ignored': 'black bold',

           'status.modified': 'blue bold',

           'status.removed': 'red bold',

           'status.unknown': 'magenta bold underline'}

def render_effects(text, effects):

    'Wrap text in commands to turn on each effect.'

    if not text:

        return text

    start = [str(_effects[e]) for e in ['none'] + effects.split()]

    start = '\033[' + ';'.join(start) + 'm'

    stop = '\033[' + str(_effects['none']) + 'm'

    return ''.join([start, text, stop])

def extstyles():

    for name, ext in extensions.extensions():

        _styles.update(getattr(ext, 'colortable', {}))

def configstyles(ui):

    for status, cfgeffects in ui.configitems('color'):

        if '.' not in status:

            continue

        cfgeffects = ui.configlist('color', status)

        if cfgeffects:

            good = []

            for e in cfgeffects:

                if e in _effects:

                    good.append(e)

                else:

                    ui.warn(_("ignoring unknown color/effect %r "

                              "(configured in color.%s)\n")

                            % (e, status))

            _styles[status] = ' '.join(good)

_buffers = None

def style(msg, label):

    effects = []

    for l in label.split():

        s = _styles.get(l, '')

        if s:

            effects.append(s)

    effects = ''.join(effects)

    if effects:

        return '\n'.join([render_effects(s, effects)

                          for s in msg.split('\n')])

    return msg

def popbuffer(orig, labeled=False):

    global _buffers

    if labeled:

        return ''.join(style(a, label) for a, label in _buffers.pop())

    return ''.join(a for a, label in _buffers.pop())

def write(orig, *args, **opts):

    label = opts.get('label', '')

    global _buffers

    if _buffers:

        _buffers[-1].extend([(str(a), label) for a in args])

    else:

        return orig(*[style(str(a), label) for a in args], **opts)

def write_err(orig, *args, **opts):

    label = opts.get('label', '')

def uisetup(ui):

    def colorcmd(orig, ui_, opts, cmd, cmdfunc):

        if (opts['color'] == 'always' or

            (opts['color'] == 'auto' and (os.environ.get('TERM') != 'dumb'

                                          and sys.__stdout__.isatty()))):

            global _buffers

            _buffers = ui_._buffers

            extensions.wrapfunction(ui_, 'popbuffer', popbuffer)

            extensions.wrapfunction(ui_, 'write', write)

            extensions.wrapfunction(ui_, 'write_err', write_err)

            ui_.label = style

            extstyles()

            configstyles(ui)

        return orig(ui_, opts, cmd, cmdfunc)

    extensions.wrapfunction(dispatch, '_runcommand', colorcmd)

commands.globalopts.append(('', 'color', 'auto',

                            _("when to colorize (always, auto, or never)")))