[easytag/wip/et_core-refactor] Simplify ET_Core from 2 functions to 4

[David King <davidk src gnome org>]

commit 9e748f07d21133d665191e3858a5421616c26d01
Author: David King <amigadave amigadave com>
Date:   Wed Dec 31 11:08:57 2014 +0000

    Simplify ET_Core from 2 functions to 4
    
    Remove the duplication of create/initialize and free/destroy to just a
    single ET_Core_Create() and ET_Core_Free().

 src/application.c        |    2 +-
 src/application_window.c |    5 ++++-
 src/easytag.c            |    4 ++--
 src/et_core.c            |   31 ++++---------------------------
 src/et_core.h            |    6 ++----
 5 files changed, 13 insertions(+), 35 deletions(-)
---
diff --git a/src/application.c b/src/application.c
index 72a8212..a970cc4 100644
--- a/src/application.c
+++ b/src/application.c
@@ -111,7 +111,7 @@ on_idle_init (EtApplication *self)
     priv = et_application_get_instance_private (self);
 
     ET_Core_Free ();
-    ET_Core_Initialize ();
+    ET_Core_Create ();
 
     if (g_settings_get_boolean (MainSettings, "scan-startup"))
     {
diff --git a/src/application_window.c b/src/application_window.c
index e400b0c..db1318f 100644
--- a/src/application_window.c
+++ b/src/application_window.c
@@ -1592,7 +1592,10 @@ et_application_window_dispose (GObject *object)
 
     save_state (self);
 
-    ET_Core_Destroy ();
+    if (ETCore)
+    {
+        ET_Core_Free ();
+    }
 
     if (priv->cddb_dialog)
     {
diff --git a/src/easytag.c b/src/easytag.c
index 13b91d9..d48810e 100644
--- a/src/easytag.c
+++ b/src/easytag.c
@@ -920,8 +920,8 @@ Read_Directory (const gchar *path_real)
     ReadingDirectory = TRUE;    /* A flag to avoid to start another reading */
 
     /* Initialize file list */
-    ET_Core_Free();
-    ET_Core_Initialize();
+    ET_Core_Free ();
+    ET_Core_Create ();
     et_application_window_update_actions (ET_APPLICATION_WINDOW (MainWindow));
 
     window = ET_APPLICATION_WINDOW (MainWindow);
diff --git a/src/et_core.c b/src/et_core.c
index e08bc46..ebe33c0 100644
--- a/src/et_core.c
+++ b/src/et_core.c
@@ -36,31 +36,16 @@ ET_Core_Create (void)
     /* Allocate. */
     if (ETCore == NULL)
     {
-        ETCore = g_slice_new (ET_Core);
+        ETCore = g_slice_new0 (ET_Core);
     }
-
-    /* Initialize. */
-    ET_Core_Initialize ();
-}
-
-void
-ET_Core_Initialize (void)
-{
-    ETCore->ETFileList                        = NULL;
-    ETCore->ETFileDisplayedList               = NULL;
-    ETCore->ETFileDisplayedListPtr            = NULL;
-    ETCore->ETFileDisplayedList_Length        = 0;
-    ETCore->ETFileDisplayedList_TotalSize     = 0;
-    ETCore->ETFileDisplayedList_TotalDuration = 0;
-    ETCore->ETFileDisplayed                   = NULL;
-    ETCore->ETHistoryFileList                 = NULL;
-    ETCore->ETArtistAlbumFileList             = NULL;
 }
 
 void
 ET_Core_Free (void)
 {
-    // Frees first lists, then initialize
+    g_return_if_fail (ETCore != NULL);
+
+    /* First frees lists. */
     if (ETCore->ETFileList)
         ET_Free_File_List();
 
@@ -73,16 +58,8 @@ ET_Core_Free (void)
     if (ETCore->ETArtistAlbumFileList)
         ET_Free_Artist_Album_File_List();
 
-    // Initialize by security
-    ET_Core_Initialize();
-}
-
-void
-ET_Core_Destroy (void)
-{
     if (ETCore)
     {
-        ET_Core_Free ();
         g_slice_free (ET_Core, ETCore);
         ETCore = NULL;
     }
diff --git a/src/et_core.h b/src/et_core.h
index 1afb9a3..1fb6bfe 100644
--- a/src/et_core.h
+++ b/src/et_core.h
@@ -61,10 +61,8 @@ typedef struct
 
 extern ET_Core *ETCore; /* Main pointer to structure needed by EasyTAG. */
 
-void ET_Core_Create     (void);
-void ET_Core_Initialize (void);
-void ET_Core_Free       (void);
-void ET_Core_Destroy    (void);
+void ET_Core_Create (void);
+void ET_Core_Free (void);
 
 G_END_DECLS