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#Copyright (c) 2011 Walter Bender
#Copyright (c) 2012 Ignacio Rodriguez
# 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 3 of the License, or
# (at your option) any later version.
#
# You should have received a copy of the GNU General Public License
# along with this library; if not, write to the Free Software
# Foundation, 51 Franklin Street, Suite 500 Boston, MA 02110-1335 USA
import os
from gi.repository import GdkPixbuf
import subprocess
from StringIO import StringIO
import json
json.dumps
from json import load as jload
from json import dump as jdump
XO1 = 'xo1'
XO15 = 'xo1.5'
XO175 = 'xo1.75'
UNKNOWN = 'unknown'
def get_hardware():
''' Determine whether we are using XO 1.0, 1.5, or "unknown" hardware '''
product = _get_dmi('product_name')
if product is None:
if os.path.exists('/sys/devices/platform/lis3lv02d/position'):
return XO175 # FIXME: temporary check for XO 1.75
elif os.path.exists('/etc/olpc-release') or \
os.path.exists('/sys/power/olpc-pm'):
return XO1
else:
return UNKNOWN
if product != 'XO':
return UNKNOWN
version = _get_dmi('product_version')
if version == '1':
return XO1
elif version == '1.5':
return XO15
else:
return XO175
def _get_dmi(node):
''' The desktop management interface should be a reliable source
for product and version information. '''
path = os.path.join('/sys/class/dmi/id', node)
try:
return open(path).readline().strip()
except:
return None
def json_load(text):
''' Load JSON data using what ever resources are available. '''
io = StringIO(text)
try:
listdata = jload(io)
except ValueError:
# assume that text is ascii list
listdata = text.split()
for i, value in enumerate(listdata):
listdata[i] = int(value)
return listdata
def json_dump(data):
''' Save data using available JSON tools. '''
_io = StringIO()
jdump(data, _io)
return _io.getvalue()
def get_path(activity, path):
''' Find a Rainbow-approved place for temporary files. '''
return(os.path.join(activity.get_activity_root(), path))
def file_to_base64(activity, path):
''' Given a file, convert its contents to base64 '''
base64 = os.path.join(get_path(activity, 'instance'), 'base64tmp')
cmd = 'base64 <' + path + ' >' + base64
subprocess.check_call(cmd, shell=True)
file_handle = open(base64, 'r')
data = file_handle.read()
file_handle.close()
os.remove(base64)
return data
def pixbuf_to_base64(activity, pixbuf):
''' Convert pixbuf to base64-encoded data '''
png_file = os.path.join(get_path(activity, 'instance'), 'imagetmp.png')
if pixbuf != None:
pixbuf.save(png_file, "png")
data = file_to_base64(activity, png_file)
os.remove(png_file)
return data
def base64_to_file(activity, data, path):
''' Given a file, convert its contents from base64 '''
base64 = os.path.join(get_path(activity, 'instance'), 'base64tmp')
file_handle = open(base64, 'w')
file_handle.write(data)
file_handle.close()
cmd = 'base64 -d <' + base64 + '>' + path
subprocess.check_call(cmd, shell=True)
os.remove(base64)
def base64_to_pixbuf(activity, data, width=55, height=55):
''' Convert base64-encoded data to a pixbuf '''
png_file = os.path.join(get_path(activity, 'instance'), 'imagetmp.png')
base64_to_file(activity, data, png_file)
pixbuf = GdkPixbuf.Pixbuf.new_from_file_at_size(png_file, width, height)
os.remove(png_file)
return pixbuf
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