[gspell/wip/entry] Entry: recheck all when GspellChecker:language changes

[Sébastien Wilmet <swilmet src gnome org>]

commit 79c4b01e355d9cb6dd23aacc858b5b157ece83fd
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Oct 30 17:53:42 2016 +0100

    Entry: recheck all when GspellChecker:language changes
    
    One level deeper.
    
    A unit test will be written later, when it'll be possible to force a
    NULL language.

 gspell/gspell-entry.c |   56 +++++++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 52 insertions(+), 4 deletions(-)
---
diff --git a/gspell/gspell-entry.c b/gspell/gspell-entry.c
index 1e31747..c7e1e96 100644
--- a/gspell/gspell-entry.c
+++ b/gspell/gspell-entry.c
@@ -44,6 +44,7 @@ struct _GspellEntry
 
        GtkEntry *entry;
        GtkEntryBuffer *buffer;
+       GspellChecker *checker;
 
        /* List elements: GspellEntryWord*.
         * Used for unit tests.
@@ -70,16 +71,14 @@ G_DEFINE_TYPE (GspellEntry, gspell_entry, G_TYPE_OBJECT)
 static GspellChecker *
 get_checker (GspellEntry *gspell_entry)
 {
-       GtkEntryBuffer *gtk_buffer;
        GspellEntryBuffer *gspell_buffer;
 
-       gtk_buffer = gtk_entry_get_buffer (gspell_entry->entry);
-       if (gtk_buffer == NULL)
+       if (gspell_entry->buffer == NULL)
        {
                return NULL;
        }
 
-       gspell_buffer = gspell_entry_buffer_get_from_gtk_entry_buffer (gtk_buffer);
+       gspell_buffer = gspell_entry_buffer_get_from_gtk_entry_buffer (gspell_entry->buffer);
 
        return gspell_entry_buffer_get_spell_checker (gspell_buffer);
 }
@@ -313,10 +312,56 @@ notify_attributes_cb (GtkEntry    *gtk_entry,
 }
 
 static void
+notify_language_cb (GspellChecker *checker,
+                   GParamSpec    *pspec,
+                   GspellEntry   *gspell_entry)
+{
+       emit_changed_signal (gspell_entry);
+}
+
+static void
+set_checker (GspellEntry   *gspell_entry,
+            GspellChecker *checker)
+{
+       if (gspell_entry->checker == checker)
+       {
+               return;
+       }
+
+       if (gspell_entry->checker != NULL)
+       {
+               g_signal_handlers_disconnect_by_func (gspell_entry->checker,
+                                                     notify_language_cb,
+                                                     gspell_entry);
+
+               g_object_unref (gspell_entry->checker);
+       }
+
+       gspell_entry->checker = checker;
+
+       if (gspell_entry->checker != NULL)
+       {
+               g_signal_connect (gspell_entry->checker,
+                                 "notify::language",
+                                 G_CALLBACK (notify_language_cb),
+                                 gspell_entry);
+
+               g_object_ref (gspell_entry->checker);
+       }
+}
+
+static void
+update_checker (GspellEntry *gspell_entry)
+{
+       set_checker (gspell_entry, get_checker (gspell_entry));
+}
+
+static void
 notify_spell_checker_cb (GspellEntryBuffer *gspell_buffer,
                         GParamSpec        *pspec,
                         GspellEntry       *gspell_entry)
 {
+       update_checker (gspell_entry);
        emit_changed_signal (gspell_entry);
 }
 
@@ -355,6 +400,8 @@ set_buffer (GspellEntry    *gspell_entry,
 
                g_object_ref (gspell_entry->buffer);
        }
+
+       update_checker (gspell_entry);
 }
 
 static void
@@ -463,6 +510,7 @@ gspell_entry_dispose (GObject *object)
 
        gspell_entry->entry = NULL;
        set_buffer (gspell_entry, NULL);
+       set_checker (gspell_entry, NULL);
 
        if (gspell_entry->notify_attributes_idle_id != 0)
        {