Edit book: Fix previously used locations for file open dialogs not being remembered when edit book is launched from within the main calibre program

src/calibre/gui2/__init__.py

@@ -763,6 +763,12 @@ def pixmap_to_data(pixmap, format='JPEG', quality=90):
     pixmap.save(buf, format, quality=quality)
     return bytes(ba.data())
 
+def decouple(prefix):
+    ' Ensure that config files used by utility code are not the same as those used by the main calibre GUI '
+    dynamic.decouple(prefix)
+    from calibre.gui2.widgets import history
+    history.decouple(prefix)
+
 class ResizableDialog(QDialog):
 
     def __init__(self, *args, **kwargs):

src/calibre/gui2/tweak_book/main.py

@@ -11,7 +11,7 @@ import sys, os, importlib
 from PyQt4.Qt import QIcon
 
 from calibre.constants import islinux, iswindows
-from calibre.gui2 import Application, ORG_NAME, APP_UID, setup_gui_option_parser, detach_gui
+from calibre.gui2 import Application, ORG_NAME, APP_UID, setup_gui_option_parser, detach_gui, decouple
 from calibre.ptempfile import reset_base_dir
 from calibre.utils.config import OptionParser
 
@@ -54,6 +54,7 @@ def _run(args, notify=None):
     opts, args = parser.parse_args(args)
     if getattr(opts, 'detach', False):
         detach_gui()
+    decouple('edit-book-')
     override = 'calibre-edit-book' if islinux else None
     app = Application(args, override_program_name=override)
     app.load_builtin_fonts()

src/calibre/utils/config.py

@@ -202,7 +202,11 @@ class DynamicConfig(dict):
         self.file_path = os.path.join(config_dir, name+'.pickle')
         self.refresh()
 
-    def refresh(self):
+    def decouple(self, prefix):
+        self.file_path = os.path.join(os.path.dirname(self.file_path), prefix + os.path.basename(self.file_path))
+        self.refresh(clear_current=False)
+
+    def refresh(self, clear_current=True):
         d = {}
         if os.path.exists(self.file_path):
             with ExclusiveFile(self.file_path) as f:
@@ -216,6 +220,7 @@ class DynamicConfig(dict):
                     print 'Failed to unpickle stored object:'
                     traceback.print_exc()
                     d = {}
+        if clear_current:
             self.clear()
         self.update(d)
 
@@ -280,7 +285,11 @@ class XMLConfig(dict):
     def to_raw(self):
         return plistlib.writePlistToString(self)
 
-    def refresh(self):
+    def decouple(self, prefix):
+        self.file_path = os.path.join(os.path.dirname(self.file_path), prefix + os.path.basename(self.file_path))
+        self.refresh(clear_current=False)
+
+    def refresh(self, clear_current=True):
         d = {}
         if os.path.exists(self.file_path):
             with ExclusiveFile(self.file_path) as f:
@@ -293,6 +302,7 @@ class XMLConfig(dict):
                     import traceback
                     traceback.print_exc()
                     d = {}
+        if clear_current:
             self.clear()
         self.update(d)