[gtk+] GtkToolShell: Move vfunc default results to default implementations.

[Murray Cumming <murrayc src gnome org>]

commit 342c64c2f2066275ce525b3d8a22b6fa61e9e70e
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Aug 9 16:55:01 2011 +0200

    GtkToolShell: Move vfunc default results to default implementations.
    
    Otherwise the default values are only used if no vfunc is set,
    making that default unavailable to vfunc implementations as a fallback,
    and unavailable to language bindings (such as gtkmm) that always
    have a vfunc implementation, even if that often only tries to call
    the base vfunc implemntation.
    
    This was making gtkmm's ToolPalette's (and probably ToolBar's)
    items look like buttons instead of being flat.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=656223

 gtk/gtktoolshell.c |   52 ++++++++++++++++++++++++++++++++++++----------------
 1 files changed, 36 insertions(+), 16 deletions(-)
---
diff --git a/gtk/gtktoolshell.c b/gtk/gtktoolshell.c
index 7dc4bf5..82233a5 100644
--- a/gtk/gtktoolshell.c
+++ b/gtk/gtktoolshell.c
@@ -47,10 +47,42 @@
 typedef GtkToolShellIface GtkToolShellInterface;
 G_DEFINE_INTERFACE (GtkToolShell, gtk_tool_shell, GTK_TYPE_WIDGET);
 
+static GtkReliefStyle gtk_tool_shell_real_get_relief_style (GtkToolShell *shell);
+static GtkOrientation gtk_tool_shell_real_get_text_orientation (GtkToolShell *shell);
+static gfloat gtk_tool_shell_real_get_text_alignment (GtkToolShell *shell);
+static PangoEllipsizeMode gtk_tool_shell_real_get_ellipsize_mode (GtkToolShell *shell);
 
 static void
 gtk_tool_shell_default_init (GtkToolShellInterface *iface)
 {
+  iface->get_relief_style = gtk_tool_shell_real_get_relief_style;
+  iface->get_text_orientation = gtk_tool_shell_real_get_text_orientation;
+  iface->get_text_alignment = gtk_tool_shell_real_get_text_alignment;
+  iface->get_ellipsize_mode = gtk_tool_shell_real_get_ellipsize_mode;
+}
+
+static GtkReliefStyle
+gtk_tool_shell_real_get_relief_style (GtkToolShell *shell)
+{
+  return GTK_RELIEF_NONE;
+}
+
+static GtkOrientation
+gtk_tool_shell_real_get_text_orientation (GtkToolShell *shell)
+{
+  return GTK_ORIENTATION_HORIZONTAL;
+}
+
+static gfloat
+gtk_tool_shell_real_get_text_alignment (GtkToolShell *shell)
+{
+  return 0.5f;
+}
+
+static PangoEllipsizeMode
+gtk_tool_shell_real_get_ellipsize_mode (GtkToolShell *shell)
+{
+  return PANGO_ELLIPSIZE_NONE;
 }
 
 
@@ -123,10 +155,7 @@ gtk_tool_shell_get_relief_style (GtkToolShell *shell)
 {
   GtkToolShellIface *iface = GTK_TOOL_SHELL_GET_IFACE (shell);
 
-  if (iface->get_relief_style)
-    return iface->get_relief_style (shell);
-
-  return GTK_RELIEF_NONE;
+  return iface->get_relief_style (shell);
 }
 
 /**
@@ -168,10 +197,7 @@ gtk_tool_shell_get_text_orientation (GtkToolShell *shell)
 {
   GtkToolShellIface *iface = GTK_TOOL_SHELL_GET_IFACE (shell);
 
-  if (iface->get_text_orientation)
-    return GTK_TOOL_SHELL_GET_IFACE (shell)->get_text_orientation (shell);
-
-  return GTK_ORIENTATION_HORIZONTAL;
+  return iface->get_text_orientation (shell);
 }
 
 /**
@@ -191,10 +217,7 @@ gtk_tool_shell_get_text_alignment (GtkToolShell *shell)
 {
   GtkToolShellIface *iface = GTK_TOOL_SHELL_GET_IFACE (shell);
 
-  if (iface->get_text_alignment)
-    return GTK_TOOL_SHELL_GET_IFACE (shell)->get_text_alignment (shell);
-
-  return 0.5f;
+  return iface->get_text_alignment (shell);
 }
 
 /**
@@ -214,10 +237,7 @@ gtk_tool_shell_get_ellipsize_mode (GtkToolShell *shell)
 {
   GtkToolShellIface *iface = GTK_TOOL_SHELL_GET_IFACE (shell);
 
-  if (iface->get_ellipsize_mode)
-    return GTK_TOOL_SHELL_GET_IFACE (shell)->get_ellipsize_mode (shell);
-
-  return PANGO_ELLIPSIZE_NONE;
+  return iface->get_ellipsize_mode (shell);
 }
 
 /**