# 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.

'''add color output to status, qseries, and diff-related commands

This extension modifies the status command to add color to its 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.

To enable this extension, add this to your .hgrc file:

[extensions]

color =

Default effects my be overriden 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

'''

import os, re, sys

from mercurial import cmdutil, commands, extensions

from mercurial.i18n import _

# start and stop parameters for effects

_effect_params = {'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}

def render_effects(text, *effects):

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

    start = [str(_effect_params[e]) for e in ('none',) + effects]

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

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

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

def colorstatus(orig, ui, repo, *pats, **opts):

    '''run the status command with colored output'''

    delimiter = opts['print0'] and '\0' or '\n'

    nostatus = opts.get('no_status')

    opts['no_status'] = False

    # run status and capture its output

    ui.pushbuffer()

    retval = orig(ui, repo, *pats, **opts)

    # filter out empty strings

    lines_with_status = [ line for line in ui.popbuffer().split(delimiter) if line ]

    if nostatus:

        lines = [l[2:] for l in lines_with_status]

    else:

        lines = lines_with_status

    # apply color to output and display it

    for i in xrange(0, len(lines)):

        status = _status_abbreviations[lines_with_status[i][0]]

        effects = _status_effects[status]

        if effects:

            lines[i] = render_effects(lines[i], *effects)

        ui.write(lines[i] + delimiter)

    return retval

_status_abbreviations = { 'M': 'modified',

                          'A': 'added',

                          'R': 'removed',

                          '!': 'deleted',

                          '?': 'unknown',

                          'I': 'ignored',

                          'C': 'clean',

                          ' ': 'copied', }

_status_effects = { 'modified': ('blue', 'bold'),

                    'added': ('green', 'bold'),

                    'removed': ('red', 'bold'),

                    'deleted': ('cyan', 'bold', 'underline'),

                    'unknown': ('magenta', 'bold', 'underline'),

                    'ignored': ('black', 'bold'),

                    'clean': ('none', ),

                    'copied': ('none', ), }

def colorqseries(orig, ui, repo, *dummy, **opts):

    '''run the qseries command with colored output'''

    ui.pushbuffer()

    retval = orig(ui, repo, **opts)

    patches = ui.popbuffer().splitlines()

    for patch in patches:

        patchname = patch

        if opts['summary']:

            patchname = patchname.split(': ')[0]

        if ui.verbose:

            patchname = patchname.split(' ', 2)[-1]

        if opts['missing']:

            effects = _patch_effects['missing']

        # Determine if patch is applied.

        elif [ applied for applied in repo.mq.applied

               if patchname == applied.name ]:

            effects = _patch_effects['applied']

        else:

            effects = _patch_effects['unapplied']

        ui.write(render_effects(patch, *effects) + '\n')

    return retval

_patch_effects = { 'applied': ('blue', 'bold', 'underline'),

                   'missing': ('red', 'bold'),

                   'unapplied': ('black', 'bold'), }

def colorwrap(orig, s):

    '''wrap ui.write for colored diff output'''

    lines = s.split('\n')

    for i, line in enumerate(lines):

        stripline = line

        if line and line[0] in '+-':

            # highlight trailing whitespace, but only in changed lines

            stripline = line.rstrip()

        for prefix, style in _diff_prefixes:

            if stripline.startswith(prefix):

                lines[i] = render_effects(stripline, *_diff_effects[style])

                break

        if line != stripline:

            lines[i] += render_effects(

                line[len(stripline):], *_diff_effects['trailingwhitespace'])

    orig('\n'.join(lines))

def colorshowpatch(orig, self, node):

    '''wrap cmdutil.changeset_printer.showpatch with colored output'''

    oldwrite = extensions.wrapfunction(self.ui, 'write', colorwrap)

    try:

        orig(self, node)

    finally:

        self.ui.write = oldwrite

def colordiff(orig, ui, repo, *pats, **opts):

    '''run the diff command with colored output'''

    oldwrite = extensions.wrapfunction(ui, 'write', colorwrap)

    try:

        orig(ui, repo, *pats, **opts)

    finally:

        ui.write = oldwrite

_diff_prefixes = [('diff', 'diffline'),

                  ('copy', 'extended'),

                  ('rename', 'extended'),

                  ('old', 'extended'),

                  ('new', 'extended'),

                  ('deleted', 'extended'),

                  ('---', 'file_a'),

                  ('+++', 'file_b'),

                  ('@', 'hunk'),

                  ('-', 'deleted'),

                  ('+', 'inserted')]

_diff_effects = {'diffline': ('bold',),

                 'extended': ('cyan', 'bold'),

                 'file_a': ('red', 'bold'),

                 'file_b': ('green', 'bold'),

                 'hunk': ('magenta',),

                 'deleted': ('red',),

                 'inserted': ('green',),

                 'changed': ('white',),

                 'trailingwhitespace': ('bold', 'red_background'),}

def uisetup(ui):

    '''Initialize the extension.'''

    _setupcmd(ui, 'diff', commands.table, colordiff, _diff_effects)

    _setupcmd(ui, 'incoming', commands.table, None, _diff_effects)

    _setupcmd(ui, 'log', commands.table, None, _diff_effects)

    _setupcmd(ui, 'outgoing', commands.table, None, _diff_effects)

    _setupcmd(ui, 'tip', commands.table, None, _diff_effects)

    _setupcmd(ui, 'status', commands.table, colorstatus, _status_effects)

    try:

        mq = extensions.find('mq')

        _setupcmd(ui, 'qdiff', mq.cmdtable, colordiff, _diff_effects)

        _setupcmd(ui, 'qseries', mq.cmdtable, colorqseries, _patch_effects)

    except KeyError:

        # The mq extension is not enabled

        pass

def _setupcmd(ui, cmd, table, func, effectsmap):

    '''patch in command to command table and load effect map'''

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

        if (opts['no_color'] or opts['color'] == 'never' or

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

                                          or not sys.__stdout__.isatty()))):

            return orig(*args, **opts)

        oldshowpatch = extensions.wrapfunction(cmdutil.changeset_printer,

                                               'showpatch', colorshowpatch)

        try:

            if func is not None:

                return func(orig, *args, **opts)

            return orig(*args, **opts)

        finally:

            cmdutil.changeset_printer.showpatch = oldshowpatch

    entry = extensions.wrapcommand(table, cmd, nocolor)

    entry[1].extend([

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

        ('', 'no-color', None, _("don't colorize output")),

    ])

    for status in effectsmap:

        effects = ui.config('color', cmd + '.' + status)

        if effects:

            effectsmap[status] = re.split('\W+', effects)