DeDRM_tools/ePub_Fixer/ePub_Fixer.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 subasyncio
from subasyncio import Process
import Tkinter
import Tkconstants
import tkFileDialog
import tkMessageBox
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='Fix Improper ePubs')
        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='ePub input file').grid(row=0, sticky=Tkconstants.E)
        self.epubpath = Tkinter.Entry(body, width=50)
        self.epubpath.grid(row=0, column=1, sticky=sticky)
        cwd = os.getcwdu()
        cwd = cwd.encode('utf-8')
        self.epubpath.insert(0, cwd)
        button = Tkinter.Button(body, text="...", command=self.get_epubpath)
        button.grid(row=0, column=2)

        Tkinter.Label(body, text='Directory to store fixed ePub in').grid(row=1, sticky=Tkconstants.E)
        self.outpath = Tkinter.Entry(body, width=50)
        self.outpath.grid(row=1, column=1, sticky=sticky)
        cwd = os.getcwdu()
        cwd = cwd.encode('utf-8')
        outname = cwd
        self.outpath.insert(0, outname)
        button = Tkinter.Button(body, text="...", command=self.get_outpath)
        button.grid(row=1, column=2)

        msg1 = 'Log \n\n'
        self.stext = ScrolledText(body, bd=5, relief=Tkconstants.RIDGE, height=15, width=60, wrap=Tkconstants.WORD)
        self.stext.grid(row=2, 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.fixit)
        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' + 'ePub successfully fixed\n'
            if poll != 0:
                msg = text + '\n\n' + 'Error: ePub Fixing 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 as a subprocess via pipes and collect stdout
    def zipfixrdr(self, infile, outfile):
        # os.putenv('PYTHONUNBUFFERED', '1')
        cmdline = 'python ./lib/zipfix.py "' + infile + '" "' + outfile + '"'
        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\zipfix.py "' + infile + '" "' + outfile + '"'
            else :
                cmdline = 'lib\zipfix.py "' + infile + '" "' + outfile + '"'

        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_epubpath(self):
        epubpath = tkFileDialog.askopenfilename(
            parent=None, title='Select ePub to be Fixed',
            defaultextension='.epub', filetypes=[('ePub eBook File', '.epub'), ('Zip File', '.zip'),('All Files', '.*')])
        if epubpath:
            epubpath = os.path.normpath(epubpath)
            self.epubpath.delete(0, Tkconstants.END)
            self.epubpath.insert(0, epubpath)
        return

    def get_outpath(self):
        cwd = os.getcwdu()
        cwd = cwd.encode('utf-8')
        outpath = tkFileDialog.askdirectory(
            parent=None, title='Directory to Store Fixed ePub into',
            initialdir=cwd, initialfile=None)
        if outpath:
            outpath = os.path.normpath(outpath)
            self.outpath.delete(0, Tkconstants.END)
            self.outpath.insert(0, outpath)
        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 fixit(self):
        # now disable the button to prevent multiple launches
        self.sbotton.configure(state='disabled')
        epubpath = self.epubpath.get()
        outpath = self.outpath.get()
        if not epubpath or not os.path.exists(epubpath):
            self.status['text'] = 'Specified ePub eBook file does not exist'
            self.sbotton.configure(state='normal')
            return
        if not outpath:
            self.status['text'] = 'Error specified output directory does not exist'
            self.sbotton.configure(state='normal')
            return

        # default output file name to be input file name + '_fixed.epub'
        initname = os.path.splitext(os.path.basename(epubpath))[0]
        initname += '_fixed.epub' 
        outpath += os.sep + initname

        log = 'Command = "python zipfix.py"\n'
        log += 'ePub Path = "'+ epubpath + '"\n'
        log += 'Output File = "' + outpath + '"\n'
        log += '\n\n'
        log += 'Please Wait ...\n\n'
        log = log.encode('utf-8')
        self.stext.insert(Tkconstants.END,log)
        self.p2 = self.zipfixrdr(epubpath, outpath)

        # 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('Fix Incorrect ePubs')
    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())