[devhelp] Use directly DhBook type in DhBookManager signals callbacks

[Sébastien Wilmet <swilmet src gnome org>]

commit 6e2eb2a34a165b546de422389b2999a6360ef97e
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri May 5 12:52:25 2017 +0200

    Use directly DhBook type in DhBookManager signals callbacks

 src/dh-book-tree.c   |    7 ++-----
 src/dh-preferences.c |   12 ++++++------
 2 files changed, 8 insertions(+), 11 deletions(-)
---
diff --git a/src/dh-book-tree.c b/src/dh-book-tree.c
index c705d4f..9af6971 100644
--- a/src/dh-book-tree.c
+++ b/src/dh-book-tree.c
@@ -419,11 +419,9 @@ book_tree_add_book_to_store (DhBookTree *tree,
 
 static void
 book_tree_book_created_or_enabled_cb (DhBookManager *book_manager,
-                                      GObject       *book_object,
+                                      DhBook        *book,
                                       DhBookTree    *tree)
 {
-        DhBook *book = DH_BOOK (book_object);
-
         if (!dh_book_get_enabled (book))
                 return;
 
@@ -432,11 +430,10 @@ book_tree_book_created_or_enabled_cb (DhBookManager *book_manager,
 
 static void
 book_tree_book_deleted_or_disabled_cb (DhBookManager *book_manager,
-                                       GObject       *book_object,
+                                       DhBook        *book,
                                        DhBookTree    *tree)
 {
         DhBookTreePrivate *priv = dh_book_tree_get_instance_private (tree);
-        DhBook         *book = DH_BOOK (book_object);
         GtkTreeIter     exact_iter;
         gboolean        exact_iter_found = FALSE;
         GtkTreeIter     language_iter;
diff --git a/src/dh-preferences.c b/src/dh-preferences.c
index 083315a..91646fd 100644
--- a/src/dh-preferences.c
+++ b/src/dh-preferences.c
@@ -482,11 +482,10 @@ preferences_bookshelf_set_language_inconsistent (DhPreferences *prefs,
 
 static void
 preferences_bookshelf_book_deleted_cb (DhBookManager *book_manager,
-                                       GObject       *book_object,
+                                       DhBook        *book,
                                        DhPreferences *prefs)
 {
         DhPreferencesPrivate *priv = dh_preferences_get_instance_private (prefs);
-        DhBook      *book = DH_BOOK (book_object);
         GtkTreeIter  exact_iter;
         gboolean     exact_iter_found;
 
@@ -505,12 +504,13 @@ preferences_bookshelf_book_deleted_cb (DhBookManager *book_manager,
 
 static void
 preferences_bookshelf_book_created_cb (DhBookManager *book_manager,
-                                       GObject       *book_object,
+                                       DhBook        *book,
                                        DhPreferences *prefs)
 {
-        preferences_bookshelf_add_book_to_store (prefs,
-                                                 DH_BOOK (book_object),
-                                                 dh_book_manager_get_group_by_language (book_manager));
+        gboolean group_by_language;
+
+        group_by_language = dh_book_manager_get_group_by_language (book_manager);
+        preferences_bookshelf_add_book_to_store (prefs, book, group_by_language);
 }
 
 static void