Saving implemented

src/calibre/ebooks/oeb/polish/container.py

@@ -745,6 +745,10 @@ class EpubContainer(Container):
             f.write(guess_type('a.epub'))
         zip_rebuilder(self.root, outpath)
 
+    @property
+    def path_to_ebook(self):
+        return self.pathtoepub
+
 # }}}
 
 # AZW3 {{{
@@ -839,6 +843,11 @@ class AZW3Container(Container):
         oeb = create_oebbook(default_log, opf, plumber.opts)
         set_cover(oeb)
         outp.convert(oeb, outpath, inp, plumber.opts, default_log)
+
+    @property
+    def path_to_ebook(self):
+        return self.pathtoepub
+
 # }}}
 
 def get_container(path, log=None, tdir=None):

src/calibre/gui2/tweak_book/boss.py

@@ -10,7 +10,7 @@ import tempfile, shutil
 
 from PyQt4.Qt import QObject, QApplication
 
-from calibre.gui2 import error_dialog, choose_files
+from calibre.gui2 import error_dialog, choose_files, question_dialog, info_dialog
 from calibre.ptempfile import PersistentTemporaryDirectory
 from calibre.ebooks.oeb.polish.main import SUPPORTED
 from calibre.ebooks.oeb.polish.container import get_container, clone_container
@@ -26,6 +26,7 @@ class Boss(QObject):
         self.container_count = 0
         self.tdir = None
         self.save_manager = SaveManager(parent)
+        self.save_manager.report_error.connect(self.report_save_error)
 
     def __call__(self, gui):
         self.gui = gui
@@ -42,7 +43,10 @@ class Boss(QObject):
     def open_book(self, path=None):
         if not self.check_dirtied():
             return
-        # TODO: Check if a save is in progress and abort if it is
+        if self.save_manager.has_tasks:
+            return info_dialog(self.gui, _('Cannot open'),
+                        _('The current book is being saved, you cannot open a new book until'
+                          ' the saving is completed'), show=True)
 
         if not hasattr(path, 'rpartition'):
             path = choose_files(self.gui, 'open-book-for-tweaking', _('Choose book'),
@@ -95,6 +99,7 @@ class Boss(QObject):
         container = current_container()
         self.gui.file_list.build(container)
         self.update_global_history_actions()
+        self.gui.action_save.setEnabled(True)
         # TODO: Apply to other GUI elements
 
     def do_global_undo(self):
@@ -127,6 +132,11 @@ class Boss(QObject):
         container = clone_container(current_container(), tdir)
         self.save_manager.schedule(tdir, container)
 
+    def report_save_error(self, tb):
+        error_dialog(self.gui, _('Could not save'),
+                     _('Saving of the book failed. Click "Show Details"'
+                       ' for more information.'), det_msg=tb, show=True)
+
     def quit(self):
         if not self.confirm_quit():
             return
@@ -134,10 +144,19 @@ class Boss(QObject):
         QApplication.instance().quit()
 
     def confirm_quit(self):
+        if self.save_manager.has_tasks:
+            if not question_dialog(
+                self.gui, _('Are you sure?'), _(
+                    'The current book is being saved in the background, quitting will abort'
+                    ' the save process, are you sure?'), default_yes=False):
+                return False
+
         return True
 
     def shutdown(self):
         self.save_state()
+        self.save_manager.shutdown()
+        self.save_manager.wait(0.1)
 
     def save_state(self):
         with tprefs:

src/calibre/gui2/tweak_book/save.py

@@ -6,14 +6,17 @@ from __future__ import (unicode_literals, division, absolute_import,
 __license__ = 'GPL v3'
 __copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
 
-import shutil
+import shutil, os
 from threading import Thread
 from Queue import LifoQueue, Empty
 
 from PyQt4.Qt import (QObject, pyqtSignal, QLabel, QWidget, QHBoxLayout, Qt)
 
-from calibre.utils import join_with_timeout
+from calibre.constants import iswindows
+from calibre.ptempfile import PersistentTemporaryFile
 from calibre.gui2.progress_indicator import ProgressIndicator
+from calibre.utils import join_with_timeout
+from calibre.utils.filenames import atomic_rename
 
 class SaveWidget(QWidget):
 
@@ -101,10 +104,18 @@ class SaveManager(QObject):
         self.save_done.emit()
 
     def do_save(self, tdir, container):
+        temp = None
         try:
-            import time
+            path = container.path_to_ebook
-            time.sleep(10)
+            temp = PersistentTemporaryFile(
+                prefix=('_' if iswindows else '.'), suffix=os.path.splitext(path)[1], dir=os.path.dirname(path))
+            temp.close()
+            temp = temp.name
+            container.commit(temp)
+            atomic_rename(temp, path)
         finally:
+            if temp and os.path.exists(temp):
+                os.remove(temp)
             shutil.rmtree(tdir, ignore_errors=True)
 
     @property