Fix #2126 (per-server configuration sections)

(also move replace_key_with_bound() to core.py, to prevent having
common.py depending of config.py)

doc/en/configure.txt

@@ -483,6 +483,13 @@ after a JID. These option will apply only for the given JID. For example
 if an option appears in a section named [user@example.com], it will
 apply only for the conversations with user@example.com.
 
+If an option appears in a section named [@example.com], it will apply
+for all the conversations with people @example.com, except when the option
+is already defined in a [user@example.com] section.
+
+The priority of settings is thus like this:
+user@example.com > @example.com > Poezio (more specific to less specific)
+
 Note that some of these options can also appear in the global section,
 they will be used as a fallback value when no JID-specific option is
 found.
@@ -495,6 +502,8 @@ found.
 foo = false
 [user@example.com]
 foo = true
+[@example.com]
+bar = false
 -------------
 ============================================
 

src/common.py

@@ -20,8 +20,6 @@ import time
 import string
 import shlex
 
-from config import config
-
 ROOM_STATE_NONE = 11
 ROOM_STATE_CURRENT = 10
 ROOM_STATE_PRIVATE = 15
@@ -188,12 +186,6 @@ def shell_split(st):
     except ValueError:
         return st.split(" ")
 
-def replace_key_with_bound(key):
-    bind = config.get(key, key, 'bindings')
-    if not bind:
-        bind = key
-    return bind
-
 def parse_str_to_secs(duration=''):
     """
     Parse a string of with a number of d, h, m, s

src/config.py

@@ -16,6 +16,7 @@ from configparser import RawConfigParser, NoOptionError, NoSectionError
 from os import environ, makedirs, path
 from shutil import copy2
 from args import parse_args
+from common import safeJID
 
 
 class Config(RawConfigParser):
@@ -62,7 +63,7 @@ class Config(RawConfigParser):
         """
         return self.get(option, default, section).lower()
 
-    def get_by_tabname(self, option, default, tabname, fallback=True):
+    def get_by_tabname(self, option, default, tabname, fallback=True, fallback_server=True):
         """
         Try to get the value for the option. First we look in
         a section named `tabname`, if the option is not present
@@ -73,11 +74,27 @@ class Config(RawConfigParser):
             if option in self.options(tabname):
                 # We go the tab-specific option
                 return self.get(option, default, tabname)
+        if fallback_server:
+            return self.get_by_servname(tabname, option, default, fallback)
         if fallback:
             # We fallback to the global option
             return self.get(option, default)
         return default
 
+    def get_by_servname(self, jid, option, default, fallback=True):
+        """
+        Try to get the value of an option for a server
+        """
+        server = safeJID(jid).server
+        if server:
+            server = '@' + server
+            if server in self.sections() and option in self.options(server):
+                return self.get(option, default, server)
+        if fallback:
+            return self.get(option, default)
+        return default
+
+
     def __get(self, option, section=DEFSECTION):
         """
         facility for RawConfigParser.get

src/core.py

@@ -381,7 +381,7 @@ class Core(object):
                 res.append(current)
             return res
         while self.running:
-            big_char_list = [common.replace_key_with_bound(key)\
+            big_char_list = [replace_key_with_bound(key)\
                              for key in self.read_keyboard()]
             # whether to refresh after ALL keys have been handled
             for char_list in separate_chars_from_bindings(big_char_list):
@@ -3175,4 +3175,10 @@ class KeyDict(dict):
             return lambda: dict.get(self, '_exc_')(k[5:])
         return dict.get(self, k, d)
 
+def replace_key_with_bound(key):
+    bind = config.get(key, key, 'bindings')
+    if not bind:
+        bind = key
+    return bind
+