# progress.py show progress bars for some actions

#

# Copyright (C) 2010 Augie Fackler <durin42@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.

"""show progress bars for some actions

This extension uses the progress information logged by hg commands

to draw progress bars that are as informative as possible. Some progress

bars only offer indeterminate information, while others have a definite

end point.

The following settings are available::

  [progress]

  delay = 3 # number of seconds (float) before showing the progress bar

  changedelay = 1 # changedelay: minimum delay before showing a new topic.

                  # If set to less than 3 * refresh, that value will

                  # be used instead.

  refresh = 0.1 # time in seconds between refreshes of the progress bar

  format = topic bar number estimate # format of the progress bar

  width = <none> # if set, the maximum width of the progress information

                 # (that is, min(width, term width) will be used)

  clear-complete = True # clear the progress bar after it's done

  disable = False # if true, don't show a progress bar

  assume-tty = False # if true, ALWAYS show a progress bar, unless

                     # disable is given

Valid entries for the format field are topic, bar, number, unit,

estimate, speed, and item. item defaults to the last 20 characters of

the item, but this can be changed by adding either ``-<num>`` which

would take the last num characters, or ``+<num>`` for the first num

characters.

"""

import sys

import time

from mercurial import util

from mercurial.i18n import _

def spacejoin(*args):

    return ' '.join(s for s in args if s)

def shouldprint(ui):

    return util.isatty(sys.stderr) or ui.configbool('progress', 'assume-tty')

def fmtremaining(seconds):

    if seconds < 60:

        # i18n: format XX seconds as "XXs"

        return _("%02ds") % (seconds)

    minutes = seconds // 60

    if minutes < 60:

        seconds -= minutes * 60

        # i18n: format X minutes and YY seconds as "XmYYs"

        return _("%dm%02ds") % (minutes, seconds)

    # we're going to ignore seconds in this case

    minutes += 1

    hours = minutes // 60

    minutes -= hours * 60

    if hours < 30:

        # i18n: format X hours and YY minutes as "XhYYm"

        return _("%dh%02dm") % (hours, minutes)

    # we're going to ignore minutes in this case

    hours += 1

    days = hours // 24

    hours -= days * 24

    if days < 15:

        # i18n: format X days and YY hours as "XdYYh"

        return _("%dd%02dh") % (days, hours)

    # we're going to ignore hours in this case

    days += 1

    weeks = days // 7

    days -= weeks * 7

    if weeks < 55:

        # i18n: format X weeks and YY days as "XwYYd"

        return _("%dw%02dd") % (weeks, days)

    # we're going to ignore days and treat a year as 52 weeks

    weeks += 1

    years = weeks // 52

    weeks -= years * 52

    # i18n: format X years and YY weeks as "XyYYw"

    return _("%dy%02dw") % (years, weeks)

class progbar(object):

    def __init__(self, ui):

        self.ui = ui

        self.resetstate()

    def resetstate(self):

        self.topics = []

        self.topicstates = {}

        self.starttimes = {}

        self.startvals = {}

        self.printed = False

        self.lastprint = time.time() + float(self.ui.config(

            'progress', 'delay', default=3))

        self.lasttopic = None

        self.indetcount = 0

        self.refresh = float(self.ui.config(

            'progress', 'refresh', default=0.1))

        self.changedelay = max(3 * self.refresh,

                               float(self.ui.config(

                                   'progress', 'changedelay', default=1)))

        self.order = self.ui.configlist(

            'progress', 'format',

            default=['topic', 'bar', 'number', 'estimate'])

    def show(self, now, topic, pos, item, unit, total):

        if not shouldprint(self.ui):

            return

        termwidth = self.width()

        self.printed = True

        head = ''

        needprogress = False

        tail = ''

        for indicator in self.order:

            add = ''

            if indicator == 'topic':

                add = topic

            elif indicator == 'number':

                if total:

                    add = ('% ' + str(len(str(total))) +

                           's/%s') % (pos, total)

                else:

                    add = str(pos)

            elif indicator.startswith('item') and item:

                slice = 'end'

                if '-' in indicator:

                    wid = int(indicator.split('-')[1])

                elif '+' in indicator:

                    slice = 'beginning'

                    wid = int(indicator.split('+')[1])

                else:

                    wid = 20

                if slice == 'end':

                    add = item[-wid:]

                else:

                    add = item[:wid]

                add += (wid - len(add)) * ' '

            elif indicator == 'bar':

                add = ''

                needprogress = True

            elif indicator == 'unit' and unit:

                add = unit

            elif indicator == 'estimate':

                add = self.estimate(topic, pos, total, now)

            elif indicator == 'speed':

                add = self.speed(topic, pos, unit, now)

            if not needprogress:

                head = spacejoin(head, add)

            else:

                tail = spacejoin(tail, add)

        if needprogress:

            used = 0

            if head:

                used += len(head) + 1

            if tail:

                used += len(tail) + 1

            progwidth = termwidth - used - 3

            if total and pos <= total:

                amt = pos * progwidth // total

                bar = '=' * (amt - 1)

                if amt > 0:

                    bar += '>'

                bar += ' ' * (progwidth - amt)

            else:

                progwidth -= 3

                self.indetcount += 1

                # mod the count by twice the width so we can make the

                # cursor bounce between the right and left sides

                amt = self.indetcount % (2 * progwidth)

                amt -= progwidth

                bar = (' ' * int(progwidth - abs(amt)) + '<=>' +

                       ' ' * int(abs(amt)))

            prog = ''.join(('[', bar , ']'))

            out = spacejoin(head, prog, tail)

        else:

            out = spacejoin(head, tail)

        sys.stderr.write('\r' + out[:termwidth])

        self.lasttopic = topic

        sys.stderr.flush()

    def clear(self):

        if not shouldprint(self.ui):

            return

        sys.stderr.write('\r%s\r' % (' ' * self.width()))

    def complete(self):

        if not shouldprint(self.ui):

            return

        if self.ui.configbool('progress', 'clear-complete', default=True):

            self.clear()

        else:

            sys.stderr.write('\n')

        sys.stderr.flush()

    def width(self):

        tw = self.ui.termwidth()

        return min(int(self.ui.config('progress', 'width', default=tw)), tw)

    def estimate(self, topic, pos, total, now):

        if total is None:

            return ''

        initialpos = self.startvals[topic]

        target = total - initialpos

        delta = pos - initialpos

        if delta > 0:

            elapsed = now - self.starttimes[topic]

            if elapsed > float(

                self.ui.config('progress', 'estimate', default=2)):

                seconds = (elapsed * (target - delta)) // delta + 1

                return fmtremaining(seconds)

        return ''

    def speed(self, topic, pos, unit, now):

        initialpos = self.startvals[topic]

        delta = pos - initialpos

        elapsed = now - self.starttimes[topic]

        if elapsed > float(

            self.ui.config('progress', 'estimate', default=2)):

            return _('%d %s/sec') % (delta / elapsed, unit)

        return ''

    def progress(self, topic, pos, item='', unit='', total=None):

        now = time.time()

        if pos is None:

            self.starttimes.pop(topic, None)

            self.startvals.pop(topic, None)

            self.topicstates.pop(topic, None)

            # reset the progress bar if this is the outermost topic

            if self.topics and self.topics[0] == topic and self.printed:

                self.complete()

                self.resetstate()

            # truncate the list of topics assuming all topics within

            # this one are also closed

            if topic in self.topics:

              self.topics = self.topics[:self.topics.index(topic)]

        else:

            if topic not in self.topics:

                self.starttimes[topic] = now

                self.startvals[topic] = pos

                self.topics.append(topic)

            self.topicstates[topic] = pos, item, unit, total

            if now - self.lastprint >= self.refresh and self.topics:

                if (self.lasttopic is None # first time we printed

                    # not a topic change

                    or topic == self.lasttopic

                    # it's been long enough we should print anyway

                    or now - self.lastprint >= self.changedelay):

                    self.lastprint = now

                    self.show(now, topic, *self.topicstates[topic])

_singleton = None

def uisetup(ui):

    global _singleton

    class progressui(ui.__class__):

        _progbar = None

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

            self._progbar.progress(*args, **opts)

            return super(progressui, self).progress(*args, **opts)

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

            if self._progbar.printed:

                self._progbar.clear()

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

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

            if self._progbar.printed:

                self._progbar.clear()

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

    # Apps that derive a class from ui.ui() can use

    # setconfig('progress', 'disable', 'True') to disable this extension

    if ui.configbool('progress', 'disable'):

        return

    if shouldprint(ui) and not ui.debugflag and not ui.quiet:

        ui.__class__ = progressui

        # we instantiate one globally shared progress bar to avoid

        # competing progress bars when multiple UI objects get created

        if not progressui._progbar:

            if _singleton is None:

                _singleton = progbar(ui)

            progressui._progbar = _singleton

def reposetup(ui, repo):

    uisetup(repo.ui)