Add tweak to control which custom fields are displayed in books info

resources/default_tweaks.py

@@ -181,19 +181,25 @@ max_content_server_tags_shown=5
 # content_server_will_display is a list of custom fields to be displayed.
 # content_server_wont_display is a list of custom fields not to be displayed.
 # wont_display has priority over will_display.
-# The special value '*' means all custom fields.
+# The special value '*' means all custom fields. The value [] means no entries.
 # Defaults:
 #    content_server_will_display = ['*']
-#    content_server_wont_display = ['']
+#    content_server_wont_display = []
 # Examples:
 # To display only the custom fields #mytags and #genre:
 #   content_server_will_display = ['#mytags', '#genre']
-#   content_server_wont_display = ['']
+#   content_server_wont_display = []
 # To display all fields except #mycomments:
 #   content_server_will_display = ['*']
 #   content_server_wont_display['#mycomments']
 content_server_will_display = ['*']
-content_server_wont_display = ['']
+content_server_wont_display = []
+
+# Same as above (content server) but for the book details pane. Same syntax.
+# As above, this tweak affects only display of custom fields. The standard
+# fields are not affected
+book_details_will_display = ['*']
+book_details_wont_display = []
 
 
 # Set the maximum number of sort 'levels' that calibre will use to resort the

src/calibre/gui2/book_details.py

@@ -20,6 +20,7 @@ from calibre.constants import preferred_encoding
 from calibre.library.comments import comments_to_html
 from calibre.gui2 import config, open_local_file
 from calibre.utils.icu import sort_key
+from calibre.utils.config import tweaks
 
 # render_rows(data) {{{
 WEIGHTS = collections.defaultdict(lambda : 100)
@@ -29,8 +30,25 @@ WEIGHTS[_('Collections')] = 2
 WEIGHTS[_('Series')] = 3
 WEIGHTS[_('Tags')] = 4
 
+def keys_to_display(data):
+    kt = data.get('__cf_kt__', None)
+    if kt is None:
+        return data.keys()
+    cfkeys = frozenset([k for k in kt.values()])
+    yes_fields = set(tweaks['book_details_will_display'])
+    no_fields = set(tweaks['book_details_wont_display'])
+    if '*' in yes_fields:
+        yes_fields = cfkeys
+    if '*' in no_fields:
+        no_fields = cfkeys
+    todisplay = frozenset(yes_fields - no_fields)
+    res = [k for k in data.keys()
+              if k not in kt or (kt[k] not in cfkeys or kt[k] in todisplay)]
+    res.remove('__cf_kt__')
+    return res
+
 def render_rows(data):
-    keys = data.keys()
+    keys = keys_to_display(data)
     # First sort by name. The WEIGHTS sort will preserve this sub-order
     keys.sort(key=sort_key)
     keys.sort(key=lambda x: WEIGHTS[x])

src/calibre/gui2/library/models.py

@@ -337,6 +337,11 @@ class BooksModel(QAbstractTableModel): # {{{
             name, val = mi.format_field(key)
             if val:
                 data[name] = val
+        cf_kt = {}
+        for key,mi in self.db.all_metadata().items():
+            if mi['is_custom']:
+                cf_kt[mi['name']] = key
+        data['__cf_kt__'] = cf_kt
         return data
 
     def set_cache(self, idx):