# color.py color output for the status and qseries 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

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. 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).

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.trailingwhitespace = bold red_background

  resolve.unresolved = red bold

  resolve.resolved = green bold

  bookmarks.current = 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

  histedit.remaining = red bold

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.

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).

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.

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.

'''

import os

from mercurial import commands, dispatch, extensions, ui as uimod, util

from mercurial import templater, error

from mercurial.i18n import _

testedwith = 'internal'

# 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}

def _terminfosetup(ui, mode):

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

    global _terminfo_params

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

    if not _terminfo_params:

        return

    # Otherwise, see what the config file says.

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

        return

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

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

        if key.startswith('color.'))

    try:

        curses.setupterm()

    except curses.error, e:

        _terminfo_params = {}

        return

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

        if not b:

            continue

        if 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 _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"))

        _terminfo_params = {}

def _modesetup(ui, coloropt):

    global _terminfo_params

    auto = coloropt == 'auto'

    always = not auto and util.parsebool(coloropt)

    if not always and not auto:

        return None

    formatted = always or (os.environ.get('TERM') != 'dumb' and ui.formatted())

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

    realmode = mode

    if mode == 'auto':

        if os.name == 'nt' and 'TERM' not in os.environ:

            # looks line a cmd.exe console, use win32 API or nothing

            realmode = 'win32'

        else:

            realmode = 'ansi'

    if realmode == 'win32':

        _terminfo_params = {}

        if not w32effects:

            if mode == 'win32':

                # only warn if color.mode is explicitly set to win32

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

            return None

        _effects.update(w32effects)

    elif realmode == 'ansi':

        _terminfo_params = {}

    elif realmode == 'terminfo':

        _terminfosetup(ui, mode)

        if not _terminfo_params:

            if mode == 'terminfo':

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

                # only warn if color.mode is explicitly set to win32

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

            realmode = 'ansi'

    else:

        return None

    if always or (auto and formatted):

        return realmode

    return None

try:

    import curses

    # Mapping from effect name to terminfo attribute name or color number.

    # This will also force-load the curses module.

    _terminfo_params = {'none': (True, 'sgr0'),

                        'standout': (True, 'smso'),

                        'underline': (True, 'smul'),

                        'reverse': (True, 'rev'),

                        'inverse': (True, 'rev'),

                        'blink': (True, 'blink'),

                        'dim': (True, 'dim'),

                        'bold': (True, 'bold'),

                        'invisible': (True, 'invis'),

                        'italic': (True, 'sitm'),

                        'black': (False, curses.COLOR_BLACK),

                        'red': (False, curses.COLOR_RED),

                        'green': (False, curses.COLOR_GREEN),

                        'yellow': (False, curses.COLOR_YELLOW),

                        'blue': (False, curses.COLOR_BLUE),

                        'magenta': (False, curses.COLOR_MAGENTA),

                        'cyan': (False, curses.COLOR_CYAN),

                        'white': (False, curses.COLOR_WHITE)}

except ImportError:

    _terminfo_params = False

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

           'grep.linenumber': 'green',

           'grep.rev': 'green',

           'grep.change': 'green',

           'grep.sep': 'cyan',

           'grep.filename': 'magenta',

           'grep.user': 'magenta',

           'grep.date': 'magenta',

           'bookmarks.current': 'green',

           'branches.active': 'none',

           'branches.closed': 'black bold',

           'branches.current': 'green',

           'branches.inactive': 'none',

           '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',

           'histedit.remaining': 'red bold',

           'ui.prompt': 'yellow',

           'log.changeset': 'yellow',

           'rebase.rebased': 'blue',

           'rebase.remaining': 'red bold',

           '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',

           'tags.normal': 'green',

           'tags.local': 'black bold'}

def _effect_str(effect):

    '''Helper function for render_effects().'''

    bg = False

    if effect.endswith('_background'):

        bg = True

        effect = effect[:-11]

    attr, val = _terminfo_params[effect]

    if attr:

        return curses.tigetstr(val)

    elif bg:

        return curses.tparm(curses.tigetstr('setab'), val)

    else:

        return curses.tparm(curses.tigetstr('setaf'), val)

def render_effects(text, effects):

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

    if not text:

        return text

    if not _terminfo_params:

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

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

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

    else:

        start = ''.join(_effect_str(effect)

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

        stop = _effect_str('none')

    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 or status.startswith('color.'):

            continue

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

        if cfgeffects:

            good = []

            for e in cfgeffects:

                if not _terminfo_params and e in _effects:

                    good.append(e)

                elif e in _terminfo_params or e[:-11] in _terminfo_params:

                    good.append(e)

                else:

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

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

                            % (e, status))

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

class colorui(uimod.ui):

    def popbuffer(self, labeled=False):

        if self._colormode is None:

            return super(colorui, self).popbuffer(labeled)

        if labeled:

            return ''.join(self.label(a, label) for a, label

                           in self._buffers.pop())

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

    _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:

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

        elif self._colormode == 'win32':

            for a in args:

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

        else:

            return super(colorui, self).write(

                *[self.label(str(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._colormode == 'win32':

            for a in args:

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

        else:

            return super(colorui, self).write_err(

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

    def label(self, msg, label):

        if self._colormode is None:

            return super(colorui, self).label(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 templatelabel(context, mapping, args):

    if len(args) != 2:

        # i18n: "label" is a keyword

        raise error.ParseError(_("label expects two arguments"))

    thing = templater.stringify(args[1][0](context, mapping, args[1][1]))

    thing = templater.runtemplate(context, mapping,

                                  templater.compiletemplate(thing, context))