Add button to automatically fill in Author sort field from Author field

setup.py

@@ -256,7 +256,6 @@ if __name__ == '__main__':
                     with open('images.qrc', 'wb') as f:
                         f.write(manifest)
                     subprocess.check_call(['pyrcc4', '-o', images, 'images.qrc'])
-                    os.remove('images.qrc')
                 else:
                     print 'Images are up to date'
             finally:

src/calibre/ebooks/metadata/opf.py

@@ -241,7 +241,7 @@ class OPF(MetaInformation):
     
     def get_title(self):
         title = self.soup.package.metadata.find('dc:title')
-        if title:
+        if title and title.string:
             return self.ENTITY_PATTERN.sub(entity_to_unicode, title.string).strip()
         return self.default_title.strip()
     

src/calibre/gui2/dialogs/metadata_single.py

@@ -145,6 +145,8 @@ class MetadataSingleDialog(QDialog, Ui_MetadataSingleDialog):
                         self.edit_tags)
         QObject.connect(self.remove_series_button, SIGNAL('clicked()'),
                         self.remove_unused_series)
+        QObject.connect(self.auto_author_sort, SIGNAL('clicked()'),
+                        self.deduce_author_sort)
         self.connect(self.swap_button, SIGNAL('clicked()'), self.swap_title_author)
         self.timeout = float(prefs['network_timeout'])
         self.title.setText(db.title(row))
@@ -195,6 +197,16 @@ class MetadataSingleDialog(QDialog, Ui_MetadataSingleDialog):
             if not pm.isNull(): 
                 self.cover.setPixmap(pm)
     
+    def deduce_author_sort(self):
+        au = unicode(self.authors.text())
+        tokens = au.split()
+        for x in (',', ';'):
+            if x in tokens:
+                tokens.remove(x)
+        if tokens:
+            tokens = [tokens[-1]+';'] + tokens[:-1]
+        self.author_sort.setText(u' '.join(tokens))
+    
     def swap_title_author(self):
         title = self.title.text()
         self.title.setText(self.authors.text())

src/calibre/gui2/dialogs/metadata_single.ui

@@ -5,7 +5,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>796</width>
+    <width>923</width>
     <height>715</height>
    </rect>
   </property>
@@ -116,11 +116,29 @@
            </widget>
           </item>
           <item row="2" column="1" colspan="2" >
-           <widget class="QLineEdit" name="author_sort" >
-            <property name="toolTip" >
-             <string>Specify how the author(s) of this book should be sorted. For example Charles Dickens should be sorted as Dickens, Charles.</string>
-            </property>
-           </widget>
+           <layout class="QHBoxLayout" name="horizontalLayout" >
+            <item>
+             <widget class="QLineEdit" name="author_sort" >
+              <property name="toolTip" >
+               <string>Specify how the author(s) of this book should be sorted. For example Charles Dickens should be sorted as Dickens, Charles.</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QToolButton" name="auto_author_sort" >
+              <property name="toolTip" >
+               <string>Automatically create the author sort entry based on the current author entry</string>
+              </property>
+              <property name="text" >
+               <string>...</string>
+              </property>
+              <property name="icon" >
+               <iconset resource="../images.qrc" >
+                <normaloff>:/images/auto_author_sort.svg</normaloff>:/images/auto_author_sort.svg</iconset>
+              </property>
+             </widget>
+            </item>
+           </layout>
           </item>
           <item row="3" column="0" >
            <widget class="QLabel" name="label_6" >