#
# Copyright (c) 2009 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
"""
Text User Interface wrapper
"""
import sys
import os
def call_dlg(dlgcmd, *args, **kw):
"Wrapper for calling 'dialog' program"
indesc, outdesc = os.pipe()
pid = os.fork()
if (not pid):
os.close(2)
os.dup(outdesc)
os.close(indesc)
dlgargs = [dlgcmd]
for key, val in kw.items():
dlgargs.append('--' + key)
dlgargs.append(val)
dlgargs += args
os.execlp(dlgcmd, *dlgargs)
os.close(outdesc)
try:
errout = os.fdopen(indesc, 'r')
data = errout.read()
errout.close()
pid, status = os.wait()
except:
# Reset terminal
os.system('reset')
raise
if (not os.WIFEXITED(status)):
# Reset terminal
os.system('reset')
raise EOFError
status = os.WEXITSTATUS(status)
if (status == 255):
raise EOFError
return (status, data)
try:
import snack
newt = True
dialog = False
except ImportError:
newt = False
dlgcmd = os.environ.get('DIALOG', 'dialog')
if (call_dlg(dlgcmd, '--print-maxsize')[0] != 0):
dialog = False
else:
dialog = True
width_extra = 13
height_extra = 11
def width_fix(screen, width):
"Correct width to screen size"
if (width + width_extra > screen.width):
width = screen.width - width_extra
if (width <= 0):
width = screen.width
return width
def height_fix(screen, height):
"Correct height to screen size"
if (height + height_extra > screen.height):
height = screen.height - height_extra
if (height <= 0):
height = screen.height
return height
def screen_init():
"Initialize the screen"
if (newt):
return snack.SnackScreen()
return None
def screen_done(screen):
"Cleanup the screen"
if (newt):
screen.finish()
def choice_window(screen, title, text, options, position):
"Create options menu"
maxopt = 0
for option in options:
length = len(option)
if (length > maxopt):
maxopt = length
width = maxopt
height = len(options)
if (newt):
width = width_fix(screen, width + width_extra)
height = height_fix(screen, height)
buttonbar = snack.ButtonBar(screen, ('Done', 'Cancel'))
textbox = snack.TextboxReflowed(width, text)
listbox = snack.Listbox(height, scroll = True, returnExit = 1)
cnt = 0
for option in options:
listbox.append(option, cnt)
cnt += 1
if (position != None):
listbox.setCurrent(position)
grid = snack.GridForm(screen, title, 1, 3)
grid.add(textbox, 0, 0)
grid.add(listbox, 0, 1, padding = (0, 1, 0, 1))
grid.add(buttonbar, 0, 2, growx = 1)
retval = grid.runOnce()
return (buttonbar.buttonPressed(retval), listbox.current())
elif (dialog):
args = []
cnt = 0
for option in options:
args.append(str(cnt + 1))
args.append(option)
cnt += 1
kw = {}
if (position != None):
kw['default-item'] = str(position + 1)
status, data = call_dlg(dlgcmd, '--title', title, '--extra-button', '--extra-label', 'Done', '--menu', text, str(height + height_extra), str(width + width_extra), str(cnt), *args, **kw)
if (status == 1):
return ('cancel', None)
try:
choice = int(data) - 1
except ValueError:
return ('cancel', None)
if (status == 0):
return (None, choice)
return ('done', choice)
sys.stdout.write("\n *** %s *** \n%s\n\n" % (title, text))
maxcnt = len(str(len(options)))
cnt = 0
for option in options:
sys.stdout.write("%*s. %s\n" % (maxcnt, cnt + 1, option))
cnt += 1
sys.stdout.write("\n%*s. Done\n" % (maxcnt, '0'))
sys.stdout.write("%*s. Quit\n\n" % (maxcnt, 'q'))
while True:
if (position != None):
sys.stdout.write("Selection[%s]: " % str(position + 1))
else:
sys.stdout.write("Selection: ")
inp = sys.stdin.readline()
if (not inp):
raise EOFError
if (not inp.strip()):
if (position != None):
return (None, position)
continue
if (inp.strip() == 'q'):
return ('cancel', None)
try:
choice = int(inp.strip())
except ValueError:
continue
if (choice == 0):
return ('done', 0)
if (choice < 1) or (choice > len(options)):
continue
return (None, choice - 1)
def error_dialog(screen, title, msg):
"Print error dialog"
width = len(msg)
if (newt):
width = width_fix(screen, width)
buttonbar = snack.ButtonBar(screen, ['Ok'])
textbox = snack.TextboxReflowed(width, msg)
grid = snack.GridForm(screen, title, 1, 2)
grid.add(textbox, 0, 0, padding = (0, 0, 0, 1))
grid.add(buttonbar, 0, 1, growx = 1)
grid.runOnce()
elif (dialog):
call_dlg(dlgcmd, '--title', title, '--msgbox', msg, '6', str(width + width_extra))
sys.stdout.write("\n%s: %s\n" % (title, msg))