[devhelp: 3/36] book: notify signal if updated or deleted

[Aleksander Morgado <aleksm src gnome org>]

commit be07b08cd3ea3075e7da87706d6a55b563166c08
Author: Aleksander Morgado <aleksander lanedo com>
Date:   Thu Dec 2 16:05:40 2010 +0100

    book: notify signal if updated or deleted

 src/dh-book-manager.c |   29 ++++++++++++++++++++++++++++-
 src/dh-book.c         |   44 ++++++++++++++++++++++++++++++++++++++------
 2 files changed, 66 insertions(+), 7 deletions(-)
---
diff --git a/src/dh-book-manager.c b/src/dh-book-manager.c
index f0af2b0..cc375da 100644
--- a/src/dh-book-manager.c
+++ b/src/dh-book-manager.c
@@ -390,11 +390,32 @@ book_manager_add_from_xcode_docset (DhBookManager *book_manager,
 #endif
 
 static void
+book_manager_book_deleted_cb (DhBook   *book,
+                              gpointer  user_data)
+{
+        DhBookManager *book_manager = user_data;
+        DhBookManagerPriv *priv;
+        GList *li;
+
+        priv = GET_PRIVATE (book_manager);
+
+        /* Look for the item we want to remove */
+        li = g_list_find (priv->books, book);
+        if (li) {
+                g_debug ("Deleting book '%s' from the book manager list",
+                         dh_book_get_title (book));
+                /* Remove the item and unref our reference */
+                priv->books = g_list_delete_link (priv->books, li);
+                g_object_unref (book);
+        }
+}
+
+static void
 book_manager_add_from_filepath (DhBookManager *book_manager,
                                 const gchar   *book_path)
 {
         DhBookManagerPriv *priv;
-        DhBook            *book;
+        DhBook *book;
 
         g_return_if_fail (book_manager);
         g_return_if_fail (book_path);
@@ -425,6 +446,12 @@ book_manager_add_from_filepath (DhBookManager *book_manager,
         priv->books = g_list_insert_sorted (priv->books,
                                             book,
                                             (GCompareFunc)dh_book_cmp_by_title);
+
+        /* Get notifications of book being REMOVED */
+        g_signal_connect (book,
+                          "book-deleted",
+                          G_CALLBACK (book_manager_book_deleted_cb),
+                          book_manager);
 }
 
 GList *
diff --git a/src/dh-book.c b/src/dh-book.c
index 5c54366..4d44916 100644
--- a/src/dh-book.c
+++ b/src/dh-book.c
@@ -27,11 +27,19 @@
 #include "dh-link.h"
 #include "dh-parser.h"
 #include "dh-book.h"
+#include "dh-marshal.h"
 
 /* Timeout to wait for new events in the book so that
  * they are merged and we don't spam unneeded signals */
 #define EVENT_MERGE_TIMEOUT_SECS 2
 
+/* Signals managed by the DhBook */
+enum {
+	BOOK_UPDATED,
+        BOOK_DELETED,
+	BOOK_LAST_SIGNAL
+};
+
 /* Structure defining basic contents to store about every book */
 typedef struct {
         /* File path of the book */
@@ -54,7 +62,6 @@ typedef struct {
         gboolean      is_updated;
         /* ID of the event source */
         guint         monitor_event_timeout_id;
-
 } DhBookPriv;
 
 G_DEFINE_TYPE (DhBook, dh_book, G_TYPE_OBJECT);
@@ -69,10 +76,11 @@ static void    book_monitor_event_cb (GFileMonitor      *file_monitor,
                                       GFile             *other_file,
                                       GFileMonitorEvent  event_type,
                                       gpointer	         user_data);
-
 static void    unref_node_link       (GNode             *node,
                                       gpointer           data);
 
+static guint signals[BOOK_LAST_SIGNAL] = { 0 };
+
 static void
 book_finalize (GObject *object)
 {
@@ -113,6 +121,26 @@ dh_book_class_init (DhBookClass *klass)
 
         object_class->finalize = book_finalize;
 
+	signals[BOOK_UPDATED] =
+		g_signal_new ("book-updated",
+		              G_TYPE_FROM_CLASS (klass),
+		              G_SIGNAL_RUN_LAST,
+		              0,
+		              NULL, NULL,
+                              _dh_marshal_VOID__VOID,
+		              G_TYPE_NONE,
+                              0);
+
+	signals[BOOK_DELETED] =
+		g_signal_new ("book-deleted",
+		              G_TYPE_FROM_CLASS (klass),
+		              G_SIGNAL_RUN_LAST,
+		              0,
+		              NULL, NULL,
+                              _dh_marshal_VOID__VOID,
+		              G_TYPE_NONE,
+		              0);
+
 	g_type_class_add_private (klass, sizeof (DhBookPriv));
 }
 
@@ -209,11 +237,15 @@ book_monitor_event_timeout_cb  (gpointer data)
         /* We'll get either is_deleted OR is_updated,
          * not possible to have both or none */
         if (priv->is_deleted) {
-                g_debug ("Book '%s' was deleted",
-                         dh_book_get_title (book));
+                g_debug ("Book '%s' was deleted", dh_book_get_title (book));
+                /* Emit the signal, but make sure we hold a reference
+                 * while doing it */
+                g_object_ref (book);
+		g_signal_emit (book, signals[BOOK_DELETED], 0);
+                g_object_unref (book);
         } else if (priv->is_updated) {
-                g_debug ("Book '%s' was updated",
-                         dh_book_get_title (book));
+                g_debug ("Book '%s' was updated", dh_book_get_title (book));
+		g_signal_emit (book, signals[BOOK_UPDATED], 0);
         } else {
                 g_warn_if_reached ();
         }