Centralize APP_UID definitions

src/calibre/constants.py

@@ -1,8 +1,10 @@
-from future_builtins import map
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
+
+from future_builtins import map
+import sys, locale, codecs, os, importlib, collections
 
-__license__   = 'GPL v3'
-__copyright__ = '2008, Kovid Goyal kovid@kovidgoyal.net'
-__docformat__ = 'restructuredtext en'
 __appname__   = u'calibre'
 numeric_version = (2, 78, 0)
 __version__   = u'.'.join(map(unicode, numeric_version))
@@ -12,7 +14,6 @@ __author__    = u"Kovid Goyal <kovid@kovidgoyal.net>"
 Various run time constants.
 '''
 
-import sys, locale, codecs, os, importlib, collections
 
 _plat = sys.platform.lower()
 iswindows = 'win32' in _plat or 'win64' in _plat
@@ -34,7 +35,9 @@ isworker = 'CALIBRE_WORKER' in os.environ or 'CALIBRE_SIMPLE_WORKER' in os.envir
 if isworker:
     os.environ.pop('CALIBRE_FORCE_ANSI', None)
 FAKE_PROTOCOL, FAKE_HOST = 'https', 'calibre-internal.invalid'
-
+VIEWER_APP_UID = 'com.calibre-ebook.viewer'
+EDITOR_APP_UID = 'com.calibre-ebook.edit-book'
+MAIN_APP_UID = 'com.calibre-ebook.main-gui'
 try:
     preferred_encoding = locale.getpreferredencoding()
     codecs.lookup(preferred_encoding)

src/calibre/gui2/main.py

@@ -1,5 +1,6 @@
-__license__   = 'GPL v3'
-__copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
 
 import os
 import re
@@ -15,7 +16,7 @@ from PyQt5.Qt import QCoreApplication, QIcon, QObject, QTimer
 from calibre import force_unicode, plugins, prints
 from calibre.constants import (
     DEBUG, __appname__, filesystem_encoding, get_portable_base, islinux, isosx,
-    iswindows
+    iswindows, MAIN_APP_UID
 )
 from calibre.gui2 import (
     Application, choose_dir, error_dialog, gprefs, initialize_file_icon_provider,
@@ -532,7 +533,7 @@ def main(args=sys.argv):
         # launched from within calibre, as both use calibre-parallel.exe
         import ctypes
         try:
-            ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID('com.calibre-ebook.main-gui')
+            ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID(MAIN_APP_UID)
         except Exception:
             pass  # Only available on windows 7 and newer
 

src/calibre/gui2/tweak_book/main.py

@@ -1,28 +1,36 @@
 #!/usr/bin/env python2
 # vim:fileencoding=utf-8
-from __future__ import (unicode_literals, division, absolute_import,
-                        print_function)
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+import importlib
+import os
+import sys
+import time
+
+from PyQt5.Qt import QIcon
+
+from calibre.constants import EDITOR_APP_UID, islinux, iswindows
+from calibre.gui2 import (
+    Application, decouple, set_gui_prefs, setup_gui_option_parser
+)
+from calibre.ptempfile import reset_base_dir
+from calibre.utils.config import OptionParser
 
 __license__ = 'GPL v3'
 __copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
 
-import sys, os, importlib, time
-
-from PyQt5.Qt import QIcon
-
-from calibre.constants import islinux, iswindows
-from calibre.gui2 import Application, setup_gui_option_parser, decouple, set_gui_prefs
-from calibre.ptempfile import reset_base_dir
-from calibre.utils.config import OptionParser
-
 
 def option_parser():
-    parser =  OptionParser(_('''\
+    parser = OptionParser(
+        _(
+            '''\
 %prog [opts] [path_to_ebook] [name_of_file_inside_book ...]
 
 Launch the calibre edit book tool. You can optionally also specify the names of
 files inside the book which will be opened for editing automatically.
-'''))
+'''
+        )
+    )
     setup_gui_option_parser(parser)
     return parser
 
@@ -51,7 +59,9 @@ def _run(args, notify=None):
         # launched from within calibre, as both use calibre-parallel.exe
         import ctypes
         try:
-            ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID('com.calibre-ebook.edit-book')
+            ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID(
+                EDITOR_APP_UID
+            )
         except Exception:
             pass  # Only available on windows 7 and newer
 
@@ -93,6 +103,6 @@ def _run(args, notify=None):
 def main(args=sys.argv):
     _run(args)
 
+
 if __name__ == '__main__':
     main()
-

src/calibre/gui2/viewer/main.py

@@ -1,29 +1,38 @@
-__license__   = 'GPL v3'
-__copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
 
-import traceback, os, sys, functools
+import functools
+import os
+import sys
+import traceback
 from functools import partial
 from threading import Thread
 
 from PyQt5.Qt import (
-    QApplication, Qt, QIcon, QTimer, QByteArray, QSize, QTime, QObject,
-    QPropertyAnimation, QInputDialog, QAction, QModelIndex, pyqtSignal)
+    QAction, QApplication, QByteArray, QIcon, QInputDialog, QModelIndex, QObject,
+    QPropertyAnimation, QSize, Qt, QTime, QTimer, pyqtSignal
+)
 
-from calibre.gui2.viewer.ui import Main as MainWindow
-from calibre.gui2.viewer.toc import TOC
-from calibre.gui2.widgets import ProgressIndicator
-from calibre.gui2 import (
-    Application, choose_files, info_dialog, error_dialog,
-    open_url, setup_gui_option_parser)
-from calibre.ebooks.oeb.iterator.book import EbookIterator
-from calibre.constants import islinux, filesystem_encoding, DEBUG, iswindows
-from calibre.utils.config import Config, StringConfig, JSONConfig
-from calibre.customize.ui import available_input_formats
 from calibre import as_unicode, force_unicode, isbytestring, prints
+from calibre.constants import (
+    DEBUG, VIEWER_APP_UID, filesystem_encoding, islinux, iswindows
+)
+from calibre.customize.ui import available_input_formats
+from calibre.ebooks.oeb.iterator.book import EbookIterator
+from calibre.gui2 import (
+    Application, choose_files, error_dialog, info_dialog, open_url,
+    setup_gui_option_parser
+)
+from calibre.gui2.viewer.toc import TOC
+from calibre.gui2.viewer.ui import Main as MainWindow
+from calibre.gui2.widgets import ProgressIndicator
 from calibre.ptempfile import reset_base_dir
-from calibre.utils.ipc import viewer_socket_address, RC
+from calibre.utils.config import Config, JSONConfig, StringConfig
+from calibre.utils.ipc import RC, viewer_socket_address
+from calibre.utils.localization import canonicalize_lang, get_lang, lang_as_iso639_1
 from calibre.utils.zipfile import BadZipfile
-from calibre.utils.localization import canonicalize_lang, lang_as_iso639_1, get_lang
+
 try:
     from calibre.utils.monotonic import monotonic
 except RuntimeError:
@@ -1240,7 +1249,7 @@ def main(args=sys.argv):
         # launched from within calibre, as both use calibre-parallel.exe
         import ctypes
         try:
-            ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID('com.calibre-ebook.viewer')
+            ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID(VIEWER_APP_UID)
         except Exception:
             pass  # Only available on windows 7 and newer