wmchoose/wmchoose

#!/usr/bin/python

# Author:       Gabriele Bozzola (sbozzolo)
# Email:        sbozzolator@gmail.com
# Date:         11.05.2016
# Last Edit:    30.05.2016 (sbozzolo)

#~ This module is used to draw the interface
import npyscreen as nps

#~ To rename xinitrc and to get the HOME
from os import rename as rename
from os import getenv as getenv

#~ This dictionary is intended to contain every string of Userconf, 
#~ so it is easier to modify text and maintain the code compact

words = {'MainFormName'   : "wmchoose", 
         'ExitText'       : "Esci",
         'MenuButtonText' : "Seleziona WM",
         'MainFormText'   : "Questo script ti permette di selezionare il "
                            + "tuo gestore " 
                            + "di interfaccia grafica (Windows Manager)."
                            + " Per selezionare o deselezionare premi spazio.",
         'ConfirmExit'    : "Sicuro di voler uscire?",
         'ExitUserconf'   : "Esci da wmchoose",
         'SomethingWrong' : "Qualcosa e' andato storto! Accipigna!",
         'Success'        : "Successo!",
         'OpSuccess'      : "L'operazione e' stata portata a termine con "
                            + "successo!\nRicorda che per avviare "
                            + "l'interfaccia grafica devi utilizzare il "
                            + "comando startx.",
         'kde'            : "KDE e' un'interfaccia ricca che ricorda Windows, "
                            + "ma e' piu' pesante di LXDE.",
         'xm'             : "xmonad e' un'interfaccia per utenti molto esperti. "
                            + "Selezionalo solo se sai cosa stai facendo.",
         'x4'             : "XFCE e' un'interfaccia semplice e user friendly, ma completo. "
                            + "Se sei alle prime armi seleziona questo.",
         'flux'           : "Fluxbox e' un'interfaccia leggera con funzionalita' minime "
                            + "altamente personalizzabile.",
         'lxde'           : "LXDE e' un'interfaccia semplice e leggera che ricorda Windows, "
                            + "puoi selezionare questo se non sei esperto.",
         'aw'             : "Awesome e' un'interfaccia orientato all'utilizzo di shell multipli " 
                            + "senza finestre floating o tiling.",
         'i3'             : "I3 e' un'interfaccia orientata all'utilizzo di shell multiple "
                            + "con finestre floting, tiling e tabbing.",
         'Warning'        : "Attenzione!",
         'MoreThanOne'    : "Non puoi selezionare piu' di un manager!",
         'AtLeastOne'     : "Devi operare una scelta!",
         'Customization'  : "Il tuo file .xinitrc e' stato personalizzato."
                            + " Vuoi conservare le personalizzazioni?",
         'Backupped'      : "Il tuo file precedente e' salvato in .xinitOLD",
         'ForExperts'     : "Per utenti esperti: "
         }
                            
########################################################################
#                                                                      #
#            Box: Overloads nps.BoxBasic to contain only a             #
#            checkox widget, not a multiline                           #
#                                                                      #
########################################################################       
   
                   
class Box (nps.BoxTitle):
    _contained_widget = nps.CheckBox
                   
                  
########################################################################
#                                                                      #
#            MainForm: MAIN form, call menu and other forms            #
#            Contains menu and shortcut to every feature               #
#                                                                      #
########################################################################

class MainForm (nps.ActionFormV2):
    """Class that draws the main screen of wmchoose"""
        
    #~ Rename button using Italian language
    OK_BUTTON_TEXT      = words['ExitText']
    CANCEL_BUTTON_TEXT  = words['MenuButtonText']
        
    #~ Create form elements and menus
    def create(self):
        """Add to the form the widgets"""
        #~ Display the options
        self.add(nps.FixedText, value = words['MainFormText'], editable = False)
        self.nextrely += 1 #~ Shift down the options
        self.x4 = self.add(Box, name = "XFCE 4", min_width = 30, max_height = 5)
        self.x4.entry_widget.name = words['x4']
        self.lxde = self.add(Box, name = "LXDE", min_width = 30, max_height = 5)
        self.lxde.entry_widget.name = words['lxde']
        self.kde = self.add(Box, name = "KDE", min_width = 30, max_height = 5)
        self.kde.entry_widget.name = words['kde'] #~ Set description
        self.nextrely += 2 #~ Shift down the options
        self.add(nps.FixedText, value = words['ForExperts'], editable = False)
        self.nextrely += 2 #~ Shift down the options
        self.flux = self.add(Box, name = "Fluxbox", min_width = 30, max_height = 5)
        self.flux.entry_widget.name = words['flux']
        self.aw = self.add(Box, name = "Awesome", min_width = 30, max_height = 5)
        self.aw.entry_widget.name = words['aw']
        self.i3 = self.add(Box, name = "I3", min_width = 30, max_height = 5)
        self.i3.entry_widget.name = words['i3']
        self.xm = self.add(Box, name = "xmonad", min_width = 30, max_height = 5)
        self.xm.entry_widget.name = words['xm']
                    
    def on_cancel(self):
        """Performs checks and change .xinitrc"""
        
        #~ Check if there are more than oselection
        entries = (self.kde.entry_widget.value,
                   self.xm.entry_widget.value,
                   self.x4.entry_widget.value,
                   self.flux.entry_widget.value,
                   self.lxde.entry_widget.value,
                   self.aw.entry_widget.value,
                   self.i3.entry_widget.value)
                   
        count =  sum([1 for ct in entries if ct])
        
        if (count > 1):
            nps.notify_confirm(words['MoreThanOne'], words['Warning'])
            return #~ If there are more than 1 checked retry
            
        if (count == 0):
            nps.notify_confirm(words['AtLeastOne'], words['Warning'])
            return   #~ If there are less than 1 checked retry
        
        #~ Set the xinit string
        if (self.kde.entry_widget.value == True):
            text = "exec startkde\n"
        elif (self.xm.entry_widget.value == True):
            text = "exec xmonad\n"
        elif (self.x4.entry_widget.value == True):
            text = "exec startxfce4\n"
        elif (self.flux.entry_widget.value == True):
            text = "exec fluxbox\n"
        elif (self.lxde.entry_widget.value == True):
            text = "exec startlxde\n"
        elif (self.aw.entry_widget.value == True):
            text = "exec awesome\n"
        elif (self.i3.entry_widget.value == True):
            text = "exec i3\n"
   
        #~ Get the configuration file path
        try:
            xfile = getenv('HOME') + "/.xinitrc"
        except:
            nps.notify_confirm(words['SomethingWrong'], words['Warning'], editw = 1)               #~ If something went wrong
            self.exit_application()
            return
        
        #~ Search for user's customizations by counting the number of lines
        #~ in the file. A vanilla file should have one line
        try:
            num = sum(1 for line in open(xfile))
        except:
            nps.notify_confirm(words['SomethingWrong'], words['Warning'])               #~ If something went wrong
            self.exit_application()
            return
                   
        if (num <= 1):
            try:
                xinit = open(xfile, 'w')   #~ Open the file in write mode
                xinit.truncate()                #~ Erase the configuration file
                xinit.write(text)               #~ Write configuration
                xinit.close()                   #~ Closes file
                nps.notify_confirm(words['OpSuccess'], words['Success'], editw = 1)
                self.exit_application()  
                return
            except:
                nps.notify_confirm(words['SomethingWrong'], words['Warning'], editw = 1)               #~ If something went wrong
                self.exit_application()
                return
        else:
            #~ Ask if user want to presever customizations
            cust = nps.notify_yes_no(words['Customization'], words['Warning'], editw = 2)
            if (cust): #~ If he wants delete the last line and rewrite with the new command
                try:
                    xinit = open(xfile, 'r')   #~ Open the file in rw mode
                    lines = xinit.readlines()
                    lines = lines[:-1]
                    xinit.close()
                    xinit = open(xfile, 'w')
                    xinit.truncate()
                    xinit.writelines(lines)
                    xinit.write(text)
                    xinit.close()
                    nps.notify_confirm(words['OpSuccess'], words['Success'], editw = 1)
                    self.exit_application()  
                    return
                except:
                    nps.notify_confirm(words['SomethingWrong'], words['Warning'], editw = 1)
                    self.exit_application()
                    return
            else: #~ If he doesn't want make a backup and write a new conf file
                try:
                    rename(xfile, xfile + "OLD")
                    xinit = open(xfile, 'w')   #~ Open the file in append mode
                    xinit.write("exec startxfce4\n")
                    xinit.close()
                    notify_confirm(words['OpSuccess'] + "\n" + words['Bakupped'], 
                                        words['Success'], editw = 1)
                    self.exit_application()
                    return
                except:
                    nps.notify_confirm(words['SomethingWrong'], words['Warning'], editw = 1)
                    self.exit_application()      
                    return          
                
    def on_ok(self):
        """Ask a confirmation for exiting"""
        exiting = nps.notify_yes_no(words['ConfirmExit'], words['ExitText'], editw = 2)
        if (exiting):
            self.exit_application()
        else:
            pass #~ Do nothing
        
    def exit_application(self):
        """Closes the GUI"""
        self.parentApp.setNextForm(None)
        self.editing = False
        self.parentApp.switchFormNow()
                
########################################################################
#                                                                      #
#             GUI: Provides every form of the interface and            #
#             defines their ID and size                                #
#                                                                      #
########################################################################

class GUI (nps.NPSAppManaged):
    """Defines the whole application GUI"""
    
    def onStart( self ):
        """Adds the forms"""
        #~ Main form
        self.addForm('MAIN', MainForm, name = words['MainFormName'])

if ( __name__ == "__main__" ):
	#~ Run the application
	gui = GUI().run();