Migrate IBusConfig to GSettings

IBus plans to deprecate IBusConfig and suggests to migrate to GSettings.
https://groups.google.com/forum/#!topic/ibus-devel/Mu1IoFX-bKE

The old settings are unfortunately lost, so one has to open the setup
tool and recreate ones favourite settings.

Fix some minor bugs while doing the migration:

- Use 4 as the default Chinese mode, not -1. 4 means no special
  filtering and sorting at all, which is appropriate for non-Chinese
  tables as well.

Makefile.am

@@ -44,11 +44,28 @@ pkgconfigdir = $(libdir)/pkgconfig
 # To register as an AppStream component to be visible in the software center
 # (See http://www.freedesktop.org/software/appstream/docs/ for more details):
 appdata_DATA = \
-       ibus-table.appdata.xml \
-       $(NULL)
+	ibus-table.appdata.xml \
+	$(NULL)
 
 appdatadir = $(datadir)/metainfo
 
+schemas_DATA = \
+	org.freedesktop.ibus.engine.table.gschema.xml
+	$(NULL)
+
+schemasdir = $(datadir)/glib-2.0/schemas/
+
+install-data-hook:
+	if test -z "$(DESTDIR)"; then \
+	    glib-compile-schemas $(schemasdir); \
+	fi
+
+uninstall-hook:
+	SCHEMAS_FILES=`ls $(schemasdir)/*.gschema.xml` || true;         \
+	if test -z "$$SCHEMAS_FILES" &&                                 \
+	    test -f $(schemasdir)/gschemas.compiled; then               \
+	    rm $(schemasdir)/gschemas.compiled;                         \
+	fi
 
 AUX_DIST = \
 	config.guess \
@@ -70,6 +87,7 @@ EXTRA_DIST = \
 	config.rpath \
 	autogen.sh \
 	ibus-table.appdata.xml \
+	$(schemas_DATA) \
 	@PACKAGE_NAME@.spec \
 	$(NULL)
 

engine/it_util.py

@@ -26,33 +26,35 @@
 '''
 
 import sys
-import re
-import string
+from gi import require_version
+require_version('GLib', '2.0')
+from gi.repository import GLib
 
-def config_section_normalize(section):
-    '''Replaces “_:” with “-” in the dconf section and converts to lower case
-
-    :param section: The name of the dconf section
-    :type section: string
-    :rtype: string
-
-    To make the comparison of the dconf sections work correctly.
-
-    I avoid using .lower() here because it is locale dependent, when
-    using .lower() this would not achieve the desired effect of
-    comparing the dconf sections case insentively in some locales, it
-    would fail for example if Turkish locale (tr_TR.UTF-8) is set.
-
-    Examples:
-
-    >>> config_section_normalize('Foo_bAr:Baz')
-    'foo-bar-baz'
+def variant_to_value(variant):
     '''
-    return re.sub(r'[_:]', r'-', section).translate(
-        bytes.maketrans(
-            bytes(string.ascii_uppercase.encode('ascii')),
-            bytes(string.ascii_lowercase.encode('ascii'))))
-
+    Convert a GLib variant to a value
+    '''
+    # pylint: disable=unidiomatic-typecheck
+    if type(variant) != GLib.Variant:
+        return variant
+    type_string = variant.get_type_string()
+    if type_string == 's':
+        return variant.get_string()
+    elif type_string == 'i':
+        return variant.get_int32()
+    elif type_string == 'b':
+        return variant.get_boolean()
+    elif type_string == 'as':
+        # In the latest pygobject3 3.3.4 or later, g_variant_dup_strv
+        # returns the allocated strv but in the previous release,
+        # it returned the tuple of (strv, length)
+        if type(GLib.Variant.new_strv([]).dup_strv()) == tuple:
+            return variant.dup_strv()[0]
+        else:
+            return variant.dup_strv()
+    else:
+        print('error: unknown variant type: %s' %type_string)
+    return variant
 
 if __name__ == "__main__":
     import doctest