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3804 decky 1
#
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# Copyright (c) 2009 Martin Decky
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# - Redistributions of source code must retain the above copyright
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#   notice, this list of conditions and the following disclaimer.
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# - Redistributions in binary form must reproduce the above copyright
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#   notice, this list of conditions and the following disclaimer in the
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#   documentation and/or other materials provided with the distribution.
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# - The name of the author may not be used to endorse or promote products
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#   derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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"""
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Text User Interface wrapper
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"""
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import sys
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import os
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def call_dlg(dlgcmd, *args, **kw):
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    "Wrapper for calling 'dialog' program"
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    indesc, outdesc = os.pipe()
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    pid = os.fork()
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    if (not pid):
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        os.close(2)
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        os.dup(outdesc)
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        os.close(indesc)
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        dlgargs = [dlgcmd]
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        for key, val in kw.items():
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            dlgargs.append('--' + key)
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            dlgargs.append(val)
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        dlgargs += args
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        os.execlp(dlgcmd, *dlgargs)
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    os.close(outdesc)
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    try:
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        errout = os.fdopen(indesc, 'r')
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        data = errout.read()
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        errout.close()
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        pid, status = os.wait()
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    except:
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        # Reset terminal
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        os.system('reset')
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        raise
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    if (not os.WIFEXITED(status)):
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        # Reset terminal
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        os.system('reset')
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        raise EOFError
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    status = os.WEXITSTATUS(status)
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    if (status == 255):
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        raise EOFError
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    return (status, data)
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try:
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    import snack
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    newt = True
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    dialog = False
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except ImportError:
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    newt = False
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    dlgcmd = os.environ.get('DIALOG', 'dialog')
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    if (call_dlg(dlgcmd, '--print-maxsize')[0] != 0):
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        dialog = False
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    else:
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        dialog = True
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width_extra = 13
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height_extra = 11
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def width_fix(screen, width):
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    "Correct width to screen size"
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    if (width + width_extra > screen.width):
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        width = screen.width - width_extra
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    if (width <= 0):
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        width = screen.width
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    return width
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def height_fix(screen, height):
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    "Correct height to screen size"
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    if (height + height_extra > screen.height):
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        height = screen.height - height_extra
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    if (height <= 0):
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        height = screen.height
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    return height
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def screen_init():
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    "Initialize the screen"
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    if (newt):
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        return snack.SnackScreen()
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    return None
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def screen_done(screen):
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    "Cleanup the screen"
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    if (newt):
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        screen.finish()
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def choice_window(screen, title, text, options, position):
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    "Create options menu"
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    maxopt = 0
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    for option in options:
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        length = len(option)
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        if (length > maxopt):
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            maxopt = length
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    width = maxopt
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    height = len(options)
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    if (newt):
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        width = width_fix(screen, width + width_extra)
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        height = height_fix(screen, height)
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        buttonbar = snack.ButtonBar(screen, ('Done', 'Cancel'))
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        textbox = snack.TextboxReflowed(width, text)
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        listbox = snack.Listbox(height, scroll = True, returnExit = 1)
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        cnt = 0
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        for option in options:
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            listbox.append(option, cnt)
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            cnt += 1
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        if (position != None):
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            listbox.setCurrent(position)
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        grid = snack.GridForm(screen, title, 1, 3)
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        grid.add(textbox, 0, 0)
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        grid.add(listbox, 0, 1, padding = (0, 1, 0, 1))
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        grid.add(buttonbar, 0, 2, growx = 1)
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        retval = grid.runOnce()
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        return (buttonbar.buttonPressed(retval), listbox.current())
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    elif (dialog):
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        args = []
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        cnt = 0
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        for option in options:
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            args.append(str(cnt + 1))
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            args.append(option)
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            cnt += 1
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        kw = {}
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        if (position != None):
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            kw['default-item'] = str(position + 1)
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        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)
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        if (status == 1):
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            return ('cancel', None)
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        try:
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            choice = int(data) - 1
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        except ValueError:
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            return ('cancel', None)
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        if (status == 0):
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            return (None, choice)
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        return ('done', choice)
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    sys.stdout.write("\n *** %s *** \n%s\n\n" % (title, text))
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    maxcnt = len(str(len(options)))
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    cnt = 0
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    for option in options:
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        sys.stdout.write("%*s. %s\n" % (maxcnt, cnt + 1, option))
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        cnt += 1
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    sys.stdout.write("\n%*s. Done\n" % (maxcnt, '0'))
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    sys.stdout.write("%*s. Quit\n\n" % (maxcnt, 'q'))
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    while True:
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        if (position != None):
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            sys.stdout.write("Selection[%s]: " % str(position + 1))
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        else:
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            sys.stdout.write("Selection: ")
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        inp = sys.stdin.readline()
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        if (not inp):
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            raise EOFError
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        if (not inp.strip()):
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            if (position != None):
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                return (None, position)
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            continue
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        if (inp.strip() == 'q'):
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            return ('cancel', None)
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        try:
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            choice = int(inp.strip())
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        except ValueError:
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            continue
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        if (choice == 0):
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            return ('done', 0)
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        if (choice < 1) or (choice > len(options)):
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            continue
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        return (None, choice - 1)
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def error_dialog(screen, title, msg):
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    "Print error dialog"
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    width = len(msg)
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239
    if (newt):
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        width = width_fix(screen, width)
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        buttonbar = snack.ButtonBar(screen, ['Ok'])
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        textbox = snack.TextboxReflowed(width, msg)
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        grid = snack.GridForm(screen, title, 1, 2)
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        grid.add(textbox, 0, 0, padding = (0, 0, 0, 1))
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        grid.add(buttonbar, 0, 1, growx = 1)
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        grid.runOnce()
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    elif (dialog):
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        call_dlg(dlgcmd, '--title', title, '--msgbox', msg, '6', str(width + width_extra))
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    sys.stdout.write("\n%s: %s\n" % (title, msg))