From 23abee88ca1a234d0ed549489a505cd2a07a9a5c Mon Sep 17 00:00:00 2001
From: fujiwarat <takao.fujiwara1@gmail.com>
Date: Mon, 21 Nov 2011 11:06:21 +0900
Subject: [PATCH] Use ibus_input_context_process_key_event_async in ibus-x11

ibus-hangul calls ibus_commit_text() in process_key_event with
returing FALSE. ibus_commit_text() is async API and there is a
time issue in ibus_commit_text() and returning process_key_event.
This fix adds async in ibus-x11 process_key_event too.

BUG=RH#753781
TEST=Linux desktop

Review URL: http://codereview.appspot.com/5417044
---
 client/x11/main.c | 113 +++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 94 insertions(+), 19 deletions(-)

diff --git a/client/x11/main.c b/client/x11/main.c
index 0ba826c..58069fc 100644
--- a/client/x11/main.c
+++ b/client/x11/main.c
@@ -116,6 +116,8 @@ static gint     g_debug_level = 0;
 
 static IBusBus *_bus = NULL;
 
+static gboolean _use_sync_mode = FALSE;
+
 static void
 _xim_preedit_start (XIMS xims, const X11IC *x11ic)
 {
@@ -443,6 +445,31 @@ xim_unset_ic_focus (XIMS xims, IMChangeFocusStruct *call_data)
 
 }
 
+static void
+_process_key_event_done (GObject      *object,
+                         GAsyncResult *res,
+                         gpointer      user_data)
+{
+    IBusInputContext *context = (IBusInputContext *)object;
+    IMForwardEventStruct *pfe = (IMForwardEventStruct*) user_data;
+
+    GError *error = NULL;
+    gboolean retval = ibus_input_context_process_key_event_async_finish (
+            context,
+            res,
+            &error);
+
+    if (error != NULL) {
+        g_warning ("Process Key Event failed: %s.", error->message);
+        g_error_free (error);
+    }
+
+    if (retval == FALSE) {
+        IMForwardEvent (_xims, (XPointer) pfe);
+    }
+    g_slice_free (IMForwardEventStruct, pfe);
+}
+
 static int
 xim_forward_event (XIMS xims, IMForwardEventStruct *call_data)
 {
@@ -469,30 +496,57 @@ xim_forward_event (XIMS xims, IMForwardEventStruct *call_data)
     if (event.type == GDK_KEY_RELEASE) {
         event.state |= IBUS_RELEASE_MASK;
     }
-    retval = ibus_input_context_process_key_event (x11ic->context,
-                                                   event.keyval,
-                                                   event.hardware_keycode - 8,
-                                                   event.state);
-    if (retval) {
-        if (! x11ic->has_preedit_area) {
-            _xim_set_cursor_location (x11ic);
+
+    if (_use_sync_mode) {
+        retval = ibus_input_context_process_key_event (
+                                      x11ic->context,
+                                      event.keyval,
+                                      event.hardware_keycode - 8,
+                                      event.state);
+        if (retval) {
+            if (! x11ic->has_preedit_area) {
+                _xim_set_cursor_location (x11ic);
+            }
+            return 1;
         }
-        return 1;
-    }
 
-    IMForwardEventStruct fe;
-    memset (&fe, 0, sizeof (fe));
+        IMForwardEventStruct fe;
+        memset (&fe, 0, sizeof (fe));
 
-    fe.major_code = XIM_FORWARD_EVENT;
-    fe.icid = x11ic->icid;
-    fe.connect_id = x11ic->connect_id;
-    fe.sync_bit = 0;
-    fe.serial_number = 0L;
-    fe.event = call_data->event;
+        fe.major_code = XIM_FORWARD_EVENT;
+        fe.icid = x11ic->icid;
+        fe.connect_id = x11ic->connect_id;
+        fe.sync_bit = 0;
+        fe.serial_number = 0L;
+        fe.event = call_data->event;
 
-    IMForwardEvent (_xims, (XPointer) &fe);
+        IMForwardEvent (_xims, (XPointer) &fe);
 
-    return 1;
+        retval = 1;
+    }
+    else {
+        IMForwardEventStruct *pfe;
+
+        pfe = g_slice_new0 (IMForwardEventStruct);
+        pfe->major_code = XIM_FORWARD_EVENT;
+        pfe->icid = x11ic->icid;
+        pfe->connect_id = x11ic->connect_id;
+        pfe->sync_bit = 0;
+        pfe->serial_number = 0L;
+        pfe->event = call_data->event;
+
+        ibus_input_context_process_key_event_async (
+                                      x11ic->context,
+                                      event.keyval,
+                                      event.hardware_keycode - 8,
+                                      event.state,
+                                      -1,
+                                      NULL,
+                                      _process_key_event_done,
+                                      pfe);
+        retval = 1;
+    }
+    return retval;
 }
 
 
@@ -897,6 +951,25 @@ _context_disabled_cb (IBusInputContext *context,
     _xim_preedit_end (_xims, x11ic);
 }
 
+static gboolean
+_get_boolean_env(const gchar *name,
+                 gboolean     defval)
+{
+    const gchar *value = g_getenv (name);
+
+    if (value == NULL)
+      return defval;
+
+    if (g_strcmp0 (value, "") == 0 ||
+        g_strcmp0 (value, "0") == 0 ||
+        g_strcmp0 (value, "false") == 0 ||
+        g_strcmp0 (value, "False") == 0 ||
+        g_strcmp0 (value, "FALSE") == 0)
+      return FALSE;
+
+    return TRUE;
+}
+
 static void
 _init_ibus (void)
 {
@@ -909,6 +982,8 @@ _init_ibus (void)
 
     g_signal_connect (_bus, "disconnected",
                         G_CALLBACK (_bus_disconnected_cb), NULL);
+
+    _use_sync_mode = _get_boolean_env ("IBUS_ENABLE_SYNC_MODE", FALSE);
 }
 
 static void
-- 
2.7.4