[gnome-shell] inputMethod: Do not change IBus.Capabilite by focus events

[Carlos Garnacho <carlosg src gnome org>]

commit 60cad018807fed82c507d78b9e560b116d2abe40
Author: Takao Fujiwara <tfujiwar redhat com>
Date:   Tue Oct 1 19:53:20 2019 +0900

    inputMethod: Do not change IBus.Capabilite by focus events
    
    gnome-shell calls ibus_input_context_focus_in() in InputMethod.focus_in()
    but the event is not actually forwarded to panels and engines in GNOME
    Wayland because gnome-shell changes IBus.Capabilite by focus events and
    disables IBus.Capabilite.FOCUS when ibus_input_context_focus_in() is called.
    
    IBus.Capabilite is assumed a fixed value per input context in the
    first place and it should not be changed by focus events.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/573

 js/misc/inputMethod.js | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)
---
diff --git a/js/misc/inputMethod.js b/js/misc/inputMethod.js
index 811ba55fd2..1ca70c3df5 100644
--- a/js/misc/inputMethod.js
+++ b/js/misc/inputMethod.js
@@ -36,15 +36,7 @@ class InputMethod extends Clutter.InputMethod {
     }
 
     _updateCapabilities() {
-        let caps = 0;
-
-        if (this.can_show_preedit)
-            caps |= IBus.Capabilite.PREEDIT_TEXT;
-
-        if (this._currentFocus)
-            caps |= IBus.Capabilite.FOCUS | IBus.Capabilite.SURROUNDING_TEXT;
-        else
-            caps |= IBus.Capabilite.PREEDIT_TEXT | IBus.Capabilite.AUXILIARY_TEXT | 
IBus.Capabilite.LOOKUP_TABLE | IBus.Capabilite.PROPERTY;
+        let caps = IBus.Capabilite.PREEDIT_TEXT | IBus.Capabilite.FOCUS | IBus.Capabilite.SURROUNDING_TEXT;
 
         if (this._context)
             this._context.set_capabilities(caps);
@@ -137,7 +129,6 @@ class InputMethod extends Clutter.InputMethod {
         this._currentFocus = focus;
         if (this._context) {
             this._context.focus_in();
-            this._updateCapabilities();
             this._emitRequestSurrounding();
         }
 
@@ -149,10 +140,8 @@ class InputMethod extends Clutter.InputMethod {
 
     vfunc_focus_out() {
         this._currentFocus = null;
-        if (this._context) {
+        if (this._context)
             this._context.focus_out();
-            this._updateCapabilities();
-        }
 
         if (this._preeditStr) {
             // Unset any preedit text