~azzar1/unity/add-show-desktop-key

1079 by William Grant
Merge setup-refactor branch. This completely breaks existing installations;
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# IVLE
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# Copyright (C) 2008 The University of Melbourne
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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# Module: Date utilities
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# Author: William Grant
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# Date: 16/07/2008
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import time
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seconds_per_day = 86400 # 60 * 60 * 24
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if time.daylight:
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    timezone_offset = time.altzone
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else:
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    timezone_offset = time.timezone
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def make_date_nice(seconds_since_epoch):
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    """Given a number of seconds elapsed since the epoch,
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    generates a string representing the date/time in human-readable form.
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    "ddd mmm dd, yyyy h:m a"
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    """
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    #return time.ctime(seconds_since_epoch)
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    return time.strftime("%a %b %d %Y, %I:%M %p",
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        time.localtime(seconds_since_epoch))
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def make_date_nice_short(seconds_since_epoch):
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    """Given a number of seconds elapsed since the epoch,
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    generates a string representing the date in human-readable form.
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    Does not include the time.
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    This function generates a very compact representation."""
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    # Use a "naturalisation" algorithm.
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    days_ago = (int(time.time() - timezone_offset) / seconds_per_day
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        - int(seconds_since_epoch - timezone_offset) / seconds_per_day)
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    if days_ago <= 5:
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        # Dates today or yesterday, return "today" or "yesterday".
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        if days_ago == 0:
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            return "Today"
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        elif days_ago == 1:
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            return "Yesterday"
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        else:
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            return str(days_ago) + " days ago"
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        # Dates in the last 5 days, return "n days ago".
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    # Other dates, return a short date format.
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    # If within the same year, omit the year (mmm dd)
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    if time.localtime(seconds_since_epoch).tm_year==time.localtime().tm_year:
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        return time.strftime("%b %d", time.localtime(seconds_since_epoch))
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    # Else, include the year (mmm dd, yyyy)
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    else:
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        return time.strftime("%b %d, %Y", time.localtime(seconds_since_epoch))