DeDRM_tools/eReader_PDB_Tools/eReaderPDB2PMLZ.pyw

#!/usr/bin/env python
# vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab

import sys
sys.path.append('lib')

import os, os.path, urllib
import subprocess
from subprocess import Popen, PIPE, STDOUT
import Tkinter
import Tkconstants
import tkFileDialog
import tkMessageBox
import subasyncio
from subasyncio import Process
from scrolltextwidget import ScrolledText

class MainDialog(Tkinter.Frame):
    def __init__(self, root):
        Tkinter.Frame.__init__(self, root, border=5)
        self.root = root
        self.interval = 2000
        self.p2 = None
        self.status = Tkinter.Label(self, text='eReader eBook Conversion to PMLZ')
        self.status.pack(fill=Tkconstants.X, expand=1)
        body = Tkinter.Frame(self)
        body.pack(fill=Tkconstants.X, expand=1)
        sticky = Tkconstants.E + Tkconstants.W
        body.grid_columnconfigure(1, weight=2)

        Tkinter.Label(body, text='eBook PDB input file').grid(row=0, sticky=Tkconstants.E)
        self.pdbpath = Tkinter.Entry(body, width=50)
        self.pdbpath.grid(row=0, column=1, sticky=sticky)
        cwd = os.getcwdu()
        cwd = cwd.encode('utf-8')
        self.pdbpath.insert(0, cwd)
        button = Tkinter.Button(body, text="...", command=self.get_pdbpath)
        button.grid(row=0, column=2)

        Tkinter.Label(body, text='Name on CC').grid(row=1, sticky=Tkconstants.E)
        self.name = Tkinter.StringVar()
        self.nameinfo = Tkinter.Entry(body, width=40, textvariable=self.name)
        self.nameinfo.grid(row=1, column=1, sticky=sticky)

        Tkinter.Label(body, text='Last 8 digits of CC Number').grid(row=2, sticky=Tkconstants.E)
        self.ccnum = Tkinter.StringVar()
        self.ccinfo = Tkinter.Entry(body, width=10, textvariable=self.ccnum)
        self.ccinfo.grid(row=2, column=1, sticky=sticky)

        msg1 = 'Conversion Log \n\n'
        self.stext = ScrolledText(body, bd=5, relief=Tkconstants.RIDGE, height=15, width=60, wrap=Tkconstants.WORD)
        self.stext.grid(row=3, column=0, columnspan=2,sticky=sticky)
        self.stext.insert(Tkconstants.END,msg1)

        buttons = Tkinter.Frame(self)
        buttons.pack()
        self.sbotton = Tkinter.Button(
            buttons, text="Start", width=10, command=self.convertit)
        self.sbotton.pack(side=Tkconstants.LEFT)

        Tkinter.Frame(buttons, width=10).pack(side=Tkconstants.LEFT)
        self.qbutton = Tkinter.Button(
            buttons, text="Quit", width=10, command=self.quitting)
        self.qbutton.pack(side=Tkconstants.RIGHT)

    # read from subprocess pipe without blocking
    # invoked every interval via the widget "after"
    # option being used, so need to reset it for the next time
    def processPipe(self):
        poll = self.p2.wait('nowait')
        if poll != None: 
            text = self.p2.readerr()
            text += self.p2.read()
            msg = text + '\n\n' + 'File successfully converted\n'
            if poll != 0:
                msg = text + '\n\n' + 'Error: Conversion Failed\n'
            self.showCmdOutput(msg)
            self.p2 = None
            self.sbotton.configure(state='normal')
            return
        text = self.p2.readerr()
        text += self.p2.read()
        self.showCmdOutput(text)
        # make sure we get invoked again by event loop after interval 
        self.stext.after(self.interval,self.processPipe)
        return

    # post output from subprocess in scrolled text widget
    def showCmdOutput(self, msg):
        if msg and msg !='':
            msg = msg.encode('utf-8')
            self.stext.insert(Tkconstants.END,msg)
            self.stext.yview_pickplace(Tkconstants.END)
        return

    # run erdr2pml.py as a subprocess via pipes and collect stdout
    def erdr(self, infile, name, ccnum):
        # os.putenv('PYTHONUNBUFFERED', '1')
        cmdline = 'python ./lib/erdr2pml.py --make-pmlz "' + infile + '" "' + name + '" ' + ccnum 
        if sys.platform[0:3] == 'win':
            search_path = os.environ['PATH']
            search_path = search_path.lower()
            if search_path.find('python') >= 0: 
                cmdline = 'python lib\erdr2pml.py --make-pmlz "' + infile + '" "' + name + '" ' + ccnum
            else :
                cmdline = 'lib\erdr2pml.py --make-pmlz "' + infile + '" "' + name + '" ' + ccnum

        cmdline = cmdline.encode(sys.getfilesystemencoding())
        p2 = Process(cmdline, shell=True, bufsize=1, stdin=None, stdout=PIPE, stderr=PIPE, close_fds=False)
        return p2


    def get_pdbpath(self):
        pdbpath = tkFileDialog.askopenfilename(
            parent=None, title='Select eReader PDB File',
            defaultextension='.pdb', filetypes=[('eReader eBooks', '.pdb'),
                                                ('All Files', '.*')])
        if pdbpath:
            pdbpath = os.path.normpath(pdbpath)
            self.pdbpath.delete(0, Tkconstants.END)
            self.pdbpath.insert(0, pdbpath)
        return

    def quitting(self):
        # kill any still running subprocess
        if self.p2 != None:
            if (self.p2.wait('nowait') == None):
                self.p2.terminate()
        self.root.destroy()

    # actually ready to run the subprocess and get its output
    def convertit(self):
        # now disable the button to prevent multiple launches
        self.sbotton.configure(state='disabled')
        pdbpath = self.pdbpath.get()
        if not pdbpath or not os.path.exists(pdbpath):
            self.status['text'] = 'Specified eBook file does not exist'
            self.sbotton.configure(state='normal')
            return
        name = self.name.get()
        if not name or name == '':
            self.status['text'] = 'Your forgot to enter the Name on the CC'
            self.sbotton.configure(state='normal')
            return
        ccnum = self.ccnum.get()
        if not ccnum or ccnum == '':
            self.status['text'] = 'Your forgot to enter the last 8 digits on the CC'
            self.sbotton.configure(state='normal')
            return

        log = 'Command = "python erdr2pml.py --make-pmlz "\n'
        log += 'PDB Path = "'+ pdbpath + '"\n'
        log += 'Name = "' + name + '"\n'
        log += 'Last 8 of CC = "' + ccnum + '"\n'
        log += '\n\n'
        log += 'Please Wait ...\n'
        log = log.encode('utf-8')
        self.stext.insert(Tkconstants.END,log)
        self.p2 = self.erdr(pdbpath, name, ccnum)

        # python does not seem to allow you to create
        # your own eventloop which every other gui does - strange 
        # so need to use the widget "after" command to force
        # event loop to run non-gui events every interval
        self.stext.after(self.interval,self.processPipe)
        return


def main(argv=None):
    root = Tkinter.Tk()
    root.title('eReader PDB to PMLZ Conversion')
    root.resizable(True, False)
    root.minsize(300, 0)
    MainDialog(root).pack(fill=Tkconstants.X, expand=1)
    root.mainloop()
    return 0
    

if __name__ == "__main__":
    sys.exit(main())