Make first-letter parition nodes in the tag browser click-searchable. Make regexp searching use unicode character classes.

src/calibre/gui2/tag_view.py

@@ -727,6 +727,15 @@ class TagTreeItem(object): # {{{
         else:
             self.tag.state = set_to
 
+    def all_children(self):
+        res = []
+        def recurse(nodes, res):
+            for t in nodes:
+                res.append(t)
+                recurse(t.children, res)
+        recurse(self.children, res)
+        return res
+
     def child_tags(self):
         res = []
         def recurse(nodes, res):
@@ -1269,6 +1278,7 @@ class TagsModel(QAbstractItemModel): # {{{
                                      category_icon = category_node.icon,
                                      category_key=category_node.category_key,
                                      icon_map=self.icon_state_map)
+                            sub_cat.tag.is_searchable = False
                             self.endInsertRows()
                     else: # by 'first letter'
                         cl = cl_list[idx]
@@ -1651,7 +1661,16 @@ class TagsModel(QAbstractItemModel): # {{{
                     ans.append('%s:%s'%(node.category_key, node_searches[node.tag.state]))
 
             key = node.category_key
-            for tag_item in node.child_tags():
+            for tag_item in node.all_children():
+                if tag_item.type == TagTreeItem.CATEGORY:
+                    if self.collapse_model == 'first letter' and \
+                            tag_item.temporary and not key.startswith('@') \
+                            and tag_item.tag.state:
+                        if node_searches[tag_item.tag.state] == 'true':
+                            ans.append('%s:~^%s'%(key, tag_item.py_name))
+                        else:
+                            ans.append('(not %s:~^%s )'%(key, tag_item.py_name))
+                    continue
                 tag = tag_item.tag
                 if tag.state != TAG_SEARCH_STATES['clear']:
                     if tag.state == TAG_SEARCH_STATES['mark_minus'] or \

src/calibre/library/caches.py

@@ -145,7 +145,7 @@ def _match(query, value, matchkind):
                             return True
                 elif query == t:
                     return True
-            elif ((matchkind == REGEXP_MATCH and re.search(query, t, re.I)) or ### search unanchored
+            elif ((matchkind == REGEXP_MATCH and re.search(query, t, re.I|re.UNICODE)) or ### search unanchored
                   (matchkind == CONTAINS_MATCH and query in t)):
                     return True
         except re.error:

src/calibre/manual/faq.rst

@@ -131,7 +131,7 @@ Follow these steps to find the problem:
     * Make sure that you are connecting only a single device to your computer at a time. Do not have another |app| supported device like an iPhone/iPad etc. at the same time.
     * If you are connecting an Apple iDevice (iPad, iPod Touch, iPhone), use the 'Connect to iTunes' method in the 'Getting started' instructions in `Calibre + Apple iDevices: Start here <http://www.mobileread.com/forums/showthread.php?t=118559>`_.
     * Make sure you are running the latest version of |app|. The latest version can always be downloaded from `the calibre website <http://calibre-ebook.com/download>`_.
-    * Ensure your operating system is seeing the device. That is, the device should be mounted as a disk that you can access using Windows explorer or whatever the file management program on your computer is.
+    * Ensure your operating system is seeing the device. That is, the device should be mounted as a disk, that you can access using Windows explorer or whatever the file management program on your computer is. On Windows your device **must have been assigned a drive letter**, like K:.
     * In calibre, go to Preferences->Plugins->Device Interface plugin and make sure the plugin for your device is enabled, the plugin icon next to it should be green when it is enabled.
     * If all the above steps fail, go to Preferences->Miscellaneous and click debug device detection with your device attached and post the output as a ticket on `the calibre bug tracker <http://bugs.calibre-ebook.com>`_.