[gnome-shell/wip/carlosg/osk-cldr: 41/45] misc: Make IBus a mandatory dependency

[Carlos Garnacho <carlosg src gnome org>]

commit c0fb36d2f1fc08d6e43a1cf5e995f09173e9f8bf
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Jan 17 17:01:24 2018 +0100

    misc: Make IBus a mandatory dependency
    
    IBus was initially made optional as gnome-shell depended on too
    recent API. This API is now old enough and gnome-shell is committing
    further to IBus by implementing a ClutterInputMethod through it.
    Let's just make IBus a mandatory dependency, instead of making code
    paths trickier to cater for situations where it's missing.

 js/misc/ibusManager.js | 23 ++++++++---------------
 meson.build            |  2 ++
 2 files changed, 10 insertions(+), 15 deletions(-)
---
diff --git a/js/misc/ibusManager.js b/js/misc/ibusManager.js
index bbe2c7e1d..d2f171037 100644
--- a/js/misc/ibusManager.js
+++ b/js/misc/ibusManager.js
@@ -6,15 +6,11 @@ const Lang = imports.lang;
 const Mainloop = imports.mainloop;
 const Signals = imports.signals;
 
-let IBusCandidatePopup;
-try {
-    var IBus = imports.gi.IBus;
-    _checkIBusVersion(1, 5, 2);
-    IBusCandidatePopup = imports.ui.ibusCandidatePopup;
-} catch (e) {
-    var IBus = null;
-    log(e);
-}
+const IBus = imports.gi.IBus;
+const IBusCandidatePopup = imports.ui.ibusCandidatePopup;
+
+// Ensure runtime version matches
+_checkIBusVersion(1, 5, 2);
 
 let _ibusManager = null;
 
@@ -45,9 +41,6 @@ var IBusManager = new Lang.Class({
     _PRELOAD_ENGINES_DELAY_TIME: 30, // sec
 
     _init: function() {
-        if (!IBus)
-            return;
-
         IBus.init();
 
         this._candidatePopup = new IBusCandidatePopup.CandidatePopup();
@@ -190,7 +183,7 @@ var IBusManager = new Lang.Class({
     },
 
     getEngineDesc: function(id) {
-        if (!IBus || !this._ready || !this._engines.hasOwnProperty(id))
+        if (!this._ready || !this._engines.hasOwnProperty(id))
             return null;
 
         return this._engines[id];
@@ -200,7 +193,7 @@ var IBusManager = new Lang.Class({
         // Send id even if id == this._currentEngineName
         // because 'properties-registered' signal can be emitted
         // while this._ibusSources == null on a lock screen.
-        if (!IBus || !this._ready) {
+        if (!this._ready) {
             if (callback)
                 callback();
             return;
@@ -211,7 +204,7 @@ var IBusManager = new Lang.Class({
     },
 
     preloadEngines: function(ids) {
-        if (!IBus || !this._ibus || ids.length == 0)
+        if (!this._ibus || ids.length == 0)
             return;
 
         if (this._preloadEnginesId != 0) {
diff --git a/meson.build b/meson.build
index a0aafa205..5e46d65c8 100644
--- a/meson.build
+++ b/meson.build
@@ -27,6 +27,7 @@ mutter_req = '>= 3.26.0'
 polkit_req = '>= 0.100'
 schemas_req = '>= 3.21.3'
 startup_req = '>= 0.11'
+ibus_req = '>= 1.5.2'
 
 bt_req = '>= 3.9.0'
 gst_req = '>= 0.11.92'
@@ -87,6 +88,7 @@ mutter_dep = dependency(libmutter_pc, version: mutter_req)
 polkit_dep = dependency('polkit-agent-1', version: polkit_req)
 soup_dep = dependency('libsoup-2.4')
 startup_dep = dependency('libstartup-notification-1.0', version: startup_req)
+ibus_dep = dependency('ibus-1.0', version: ibus_req)
 x11_dep = dependency('x11')
 schemas_dep = dependency('gsettings-desktop-schemas', version: schemas_req)