[glibmm] Move Gio::DBusError to Gio::Dbus::DBusError.

[Murray Cumming <murrayc src gnome org>]

commit 055b060e47d262bc52cc64a7a9cb539b6243859a
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Feb 24 11:33:21 2011 +0100

    Move Gio::DBusError to Gio::Dbus::DBusError.
    
    * tools/m4/base.m4: Added a SECTION_H_GERROR_PRIVATE section.
    * tools/m4/gerror.m4: Import the SECTION_H_GERROR_PRIVATE section.
    * gio/src/dbuserror.hg: Put this back into the DBus namespace.
    Push a custom friend declaration into the SECTION_H_GERROR_PRIVATE section,
    because the standard generated friend declaration would not specify the
    correct one.
    This still does not rename DBusError to DBus::Error, but this is a step on
    the way.
    * examples/dbus/busserver.cc: Adapated.

 ChangeLog                  |   14 ++++++++++++++
 examples/dbus/busserver.cc |    6 +++---
 gio/src/dbuserror.hg       |   23 ++++++++++++++---------
 tools/m4/base.m4           |    3 +++
 tools/m4/gerror.m4         |    2 ++
 5 files changed, 36 insertions(+), 12 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 2de970e..13ed818 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+2011-02-24  Murray Cumming  <murrayc murrayc com>
+
+	Move Gio::DBusError to Gio::Dbus::DBusError.
+
+	* tools/m4/base.m4: Added a SECTION_H_GERROR_PRIVATE section.
+	* tools/m4/gerror.m4: Import the SECTION_H_GERROR_PRIVATE section.
+	* gio/src/dbuserror.hg: Put this back into the DBus namespace.
+	Push a custom friend declaration into the SECTION_H_GERROR_PRIVATE section, 
+	because the standard generated friend declaration would not specify the 
+	correct one.
+	This still does not rename DBusError to DBus::Error, but this is a step on 
+	the way.
+	* examples/dbus/busserver.cc: Adapated.
+
 2011-02-23  Murray Cumming  <murrayc murrayc com>
 
 	Bring back Gio::Error registration.
diff --git a/examples/dbus/busserver.cc b/examples/dbus/busserver.cc
index 534a70b..8d87e4f 100644
--- a/examples/dbus/busserver.cc
+++ b/examples/dbus/busserver.cc
@@ -100,7 +100,7 @@ static void on_method_call(const Glib::RefPtr<Gio::DBus::Connection>& connection
     if(!curr_alarm.assign_from_iso8601(time_str))
     {
       // If setting alarm was not successful, return an error.
-      Gio::DBusError error(Gio::DBusError::INVALID_ARGS,
+      Gio::DBus::DBusError error(Gio::DBus::DBusError::INVALID_ARGS,
           "Alarm string is not in ISO8601 format.");
       invocation->return_gerror(error);
     }
@@ -144,7 +144,7 @@ static void on_method_call(const Glib::RefPtr<Gio::DBus::Connection>& connection
   else
   {
     // Non-existent method on the interface.
-    Gio::DBusError error(Gio::DBusError::UNKNOWN_METHOD,
+    Gio::DBus::DBusError error(Gio::DBus::DBusError::UNKNOWN_METHOD,
       "Method does not exist.");
     invocation->return_gerror(error);
   }
@@ -174,7 +174,7 @@ void on_get_property(Glib::VariantBase& property,
   }
   else
   {
-    throw Gio::DBusError(Gio::DBusError::FAILED, "Unknown property name.");
+    throw Gio::DBus::DBusError(Gio::DBus::DBusError::FAILED, "Unknown property name.");
   }
 }
 
diff --git a/gio/src/dbuserror.hg b/gio/src/dbuserror.hg
index 95f1aa6..15fb8ef 100644
--- a/gio/src/dbuserror.hg
+++ b/gio/src/dbuserror.hg
@@ -24,21 +24,26 @@ namespace Gio
 {
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
-//Let the generated friend declaration know what wrap_init() it should refer to.
-//TODO: But the generated friend declaration needs to specify the full namespace too.
+//Our custom friend declaration (see below) needs this pre-declaration.
 void wrap_init();
 #endif // DOXYGEN_SHOULD_SKIP_THIS
 
-//TODO: Put this in the DBus namespace and remove the DBus prefix,
-//when we can get the generate friend declaration to be generated correctly.
-//namespace DBus
-//{
+namespace DBus
+{
+
+//The GMMPROC_EXTRA_NAMESPACE() macro is a hint to generate_wrap_init.pl to put it in the DBus sub-namespace
+_GMMPROC_EXTRA_NAMESPACE(DBus)
+
+
+#m4 _PUSH(SECTION_H_GERROR_PRIVATE)
+  //This extra line is only necessary because this class is in a sub-namespace, but we want 
+  //it to be used in the wrap_init() of the main namespace. It's an awkward hack.
+  friend void Gio::wrap_init(); // uses throw_func()
+#m4 _POP()
 
-//This will be necessary when putting it in the DBus namespace:
-//Add the underscore so this is recognized: GMMPROC_EXTRA_NAMESPACE(DBus)
 _WRAP_GERROR(DBusError, GDBusError, G_DBUS_ERROR, NO_GTYPE)
 
-//} //namespace DBus
+} //namespace DBus
 
 } // namespace Gio
 
diff --git a/tools/m4/base.m4 b/tools/m4/base.m4
index b09e39f..b230dee 100644
--- a/tools/m4/base.m4
+++ b/tools/m4/base.m4
@@ -201,6 +201,9 @@ dnl Property Proxies:
 dnl _NEW_SECTION(SECTION_H_PROPERTYPROXIES) 
 _NEW_SECTION(SECTION_CC_PROPERTYPROXIES)
 
+dnl Just a hack for some GError wrappers:
+_NEW_SECTION(SECTION_H_GERROR_PRIVATE) dnl  In the private part of the declaration.
+
 _NEW_SECTION(SECTION_CC_INITIALIZE_CLASS_EXTRA) dnl For instance, to initialize special member data from all constructors. Not commonly used.
 
 dnl _NEW_SECTION(PROXY)
diff --git a/tools/m4/gerror.m4 b/tools/m4/gerror.m4
index 630f03b..f18109f 100644
--- a/tools/m4/gerror.m4
+++ b/tools/m4/gerror.m4
@@ -31,6 +31,8 @@ private:
   static void throw_func(GError* gobject);
 
   friend void wrap_init(); // uses throw_func()
+
+  _IMPORT(SECTION_H_GERROR_PRIVATE)
 #endif //DOXYGEN_SHOULD_SKIP_THIS
 };