# color.py color output for Mercurial commands

#

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

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

'''colorize output from some commands

The color extension colorizes output from several Mercurial commands.

For example, the diff command shows additions in green and deletions

in red, while the status command shows modified files in magenta. Many

other commands have analogous colors. It is possible to customize

these colors.

Effects

-------

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

also available. By default, the terminfo database is used to find the

terminal codes used to change color and effect.  If terminfo is not

available, then effects are rendered with the ECMA-48 SGR control

function (aka ANSI escape codes).

The available effects in terminfo mode are 'blink', 'bold', 'dim',

'inverse', 'invisible', 'italic', 'standout', and 'underline'; in

ECMA-48 mode, the options are 'bold', 'inverse', 'italic', and

'underline'.  How each is rendered depends on the terminal emulator.

Some may not be available for a given terminal type, and will be

silently ignored.

If the terminfo entry for your terminal is missing codes for an effect

or has the wrong codes, you can add or override those codes in your

configuration::

  [color]

  terminfo.dim = \E[2m

where '\E' is substituted with an escape character.

Labels

------

Text receives color effects depending on the labels that it has. Many

default Mercurial commands emit labelled text. You can also define

your own labels in templates using the label function, see :hg:`help

templates`. A single portion of text may have more than one label. In

that case, effects given to the last label will override any other

effects. This includes the special "none" effect, which nullifies

other effects.

Labels are normally invisible. In order to see these labels and their

position in the text, use the global --color=debug option. The same

anchor text may be associated to multiple labels, e.g.

  [log.changeset changeset.secret|changeset:   22611:6f0a53c8f587]

The following are the default effects for some default labels. Default

effects may be overridden from your configuration 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.tab =

  diff.trailingwhitespace = bold red_background

  # Blank so it inherits the style of the surrounding label

  changeset.public =

  changeset.draft =

  changeset.secret =

  resolve.unresolved = red bold

  resolve.resolved = green bold

  bookmarks.active = green

  branches.active = none

  branches.closed = black bold

  branches.current = green

  branches.inactive = none

  tags.normal = green

  tags.local = black bold

  rebase.rebased = blue

  rebase.remaining = red bold

  shelve.age = cyan

  shelve.newest = green bold

  shelve.name = blue bold

  histedit.remaining = red bold

Custom colors

-------------

Because there are only eight standard colors, this module allows you

to define color names for other color slots which might be available

for your terminal type, assuming terminfo mode.  For instance::

  color.brightblue = 12

  color.pink = 207

  color.orange = 202

to set 'brightblue' to color slot 12 (useful for 16 color terminals

that have brighter colors defined in the upper eight) and, 'pink' and

'orange' to colors in 256-color xterm's default color cube.  These

defined colors may then be used as any of the pre-defined eight,

including appending '_background' to set the background to that color.

Modes

-----

By default, the color extension will use ANSI mode (or win32 mode on

Windows) if it detects a terminal. To override auto mode (to enable

terminfo mode, for example), set the following configuration option::

  [color]

  mode = terminfo

Any value other than 'ansi', 'win32', 'terminfo', or 'auto' will

disable color.

Note that on some systems, terminfo mode may cause problems when using

color with the pager extension and less -R. less with the -R option

will only display ECMA-48 color codes, and terminfo mode may sometimes

emit codes that less doesn't understand. You can work around this by

either using ansi mode (or auto mode), or by using less -r (which will

pass through all terminal control codes, not just color control

codes).

On some systems (such as MSYS in Windows), the terminal may support

a different color mode than the pager (activated via the "pager"

extension). It is possible to define separate modes depending on whether

the pager is active::

  [color]

  mode = auto

  pagermode = ansi

If ``pagermode`` is not defined, the ``mode`` will be used.

'''

from __future__ import absolute_import

try:

    import curses

    curses.COLOR_BLACK # force import

except ImportError:

    curses = None

from mercurial.i18n import _

from mercurial import (

    cmdutil,

    color,

    commands,

    dispatch,

    encoding,

    extensions,

    pycompat,

    subrepo,

    ui as uimod,

    util,

)

cmdtable = {}

command = cmdutil.command(cmdtable)

# 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 = 'ships-with-hg-core'

def _terminfosetup(ui, mode):

    '''Initialize terminfo data and the terminal if we're in terminfo mode.'''

    # If we failed to load curses, we go ahead and return.

    if not color._terminfo_params:

        return

    # Otherwise, see what the config file says.

    if mode not in ('auto', 'terminfo'):

        return

    color._terminfo_params.update((key[6:], (False, int(val), ''))

        for key, val in ui.configitems('color')

        if key.startswith('color.'))

    color._terminfo_params.update((key[9:],

                                   (True, '', val.replace('\\E', '\x1b')))

        for key, val in ui.configitems('color')

        if key.startswith('terminfo.'))

    try:

        curses.setupterm()

    except curses.error as e:

        color._terminfo_params.clear()

        return

    for key, (b, e, c) in color._terminfo_params.items():

        if not b:

            continue

        if not c and not curses.tigetstr(e):

            # Most terminals don't support dim, invis, etc, so don't be

            # noisy and use ui.debug().

            ui.debug("no terminfo entry for %s\n" % e)

            del color._terminfo_params[key]

    if not curses.tigetstr('setaf') or not curses.tigetstr('setab'):

        # Only warn about missing terminfo entries if we explicitly asked for

        # terminfo mode.

        if mode == "terminfo":

            ui.warn(_("no terminfo entry for setab/setaf: reverting to "

              "ECMA-48 color\n"))

        color._terminfo_params.clear()

def _modesetup(ui, coloropt):

    if coloropt == 'debug':

        return 'debug'

    auto = (coloropt == 'auto')

    always = not auto and util.parsebool(coloropt)

    if not always and not auto:

        return None

    formatted = (always or (encoding.environ.get('TERM') != 'dumb'

                 and ui.formatted()))

    mode = ui.config('color', 'mode', 'auto')

    # If pager is active, color.pagermode overrides color.mode.

    if getattr(ui, 'pageractive', False):

        mode = ui.config('color', 'pagermode', mode)

    realmode = mode

    if mode == 'auto':

        if pycompat.osname == 'nt':

            term = encoding.environ.get('TERM')

            # TERM won't be defined in a vanilla cmd.exe environment.

            # UNIX-like environments on Windows such as Cygwin and MSYS will

            # set TERM. They appear to make a best effort attempt at setting it

            # to something appropriate. However, not all environments with TERM

            # defined support ANSI. Since "ansi" could result in terminal

            # gibberish, we error on the side of selecting "win32". However, if

            # w32effects is not defined, we almost certainly don't support

            # "win32", so don't even try.

            if (term and 'xterm' in term) or not w32effects:

                realmode = 'ansi'

            else:

                realmode = 'win32'

        else:

            realmode = 'ansi'

    def modewarn():

        # only warn if color.mode was explicitly set and we're in

        # a formatted terminal

        if mode == realmode and ui.formatted():

            ui.warn(_('warning: failed to set color mode to %s\n') % mode)

    if realmode == 'win32':

        color._terminfo_params.clear()

        if not w32effects:

            modewarn()

            return None

        color._effects.update(w32effects)

    elif realmode == 'ansi':

        color._terminfo_params.clear()

    elif realmode == 'terminfo':

        _terminfosetup(ui, mode)

        if not color._terminfo_params:

            ## FIXME Shouldn't we return None in this case too?

            modewarn()

            realmode = 'ansi'

    else:

        return None

    if always or (auto and formatted):

        return realmode

    return None

def render_effects(text, effects):

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

    if not text:

        return text

    if not color._terminfo_params:

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

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

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

    else:

                        for effect in ['none'] + effects.split())

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

class colorui(uimod.ui):

    _colormode = 'ansi'

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

        if self._colormode is None:

            return super(colorui, self).write(*args, **opts)

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

        if self._buffers and not opts.get('prompt', False):

            if self._bufferapplylabels:

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

            else:

                self._buffers[-1].extend(args)

        elif self._colormode == 'win32':

            for a in args:

                win32print(a, super(colorui, self).write, **opts)

        else:

            return super(colorui, self).write(

                *[self.label(a, label) for a in args], **opts)

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

        if self._colormode is None:

            return super(colorui, self).write_err(*args, **opts)

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

        if self._bufferstates and self._bufferstates[-1][0]:

            return self.write(*args, **opts)

        if self._colormode == 'win32':

            for a in args:

                win32print(a, super(colorui, self).write_err, **opts)

        else:

            return super(colorui, self).write_err(

                *[self.label(a, label) for a in args], **opts)

    def showlabel(self, msg, label):

        if label and msg:

            if msg[-1] == '\n':

                return "[%s|%s]\n" % (label, msg[:-1])

            else:

                return "[%s|%s]" % (label, msg)

        else:

            return msg

    def label(self, msg, label):

        if self._colormode is None:

            return super(colorui, self).label(msg, label)

        if self._colormode == 'debug':

            return self.showlabel(msg, label)

        effects = []

        for l in label.split():

            s = color._styles.get(l, '')

            if s:

                effects.append(s)

            elif color.valideffect(l):

                effects.append(l)

        effects = ' '.join(effects)

        if effects:

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

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

        return msg

def uisetup(ui):

    if ui.plain():

        return

    if not isinstance(ui, colorui):

        colorui.__bases__ = (ui.__class__,)

        ui.__class__ = colorui

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

        mode = _modesetup(ui_, opts['color'])

        colorui._colormode = mode

        if mode and mode != 'debug':

            color.configstyles(ui_)

        return orig(ui_, opts, cmd, cmdfunc)

    def colorgit(orig, gitsub, commands, env=None, stream=False, cwd=None):

        if gitsub.ui._colormode and len(commands) and commands[0] == "diff":

                # insert the argument in the front,

                # the end of git diff arguments is used for paths

                commands.insert(1, '--color')

        return orig(gitsub, commands, env, stream, cwd)

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

    extensions.wrapfunction(subrepo.gitsubrepo, '_gitnodir', colorgit)