[libpeas] Add a sample vala plugin.

[Steve Frécinaux <sfre src gnome org>]

commit 0a6d215f42c82be9cb69c81165abbc1b7e5cc418
Author: Steve Frécinaux <code istique net>
Date:   Sun Mar 6 17:10:14 2011 +0100

    Add a sample vala plugin.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=622664

 .gitignore                                         |    1 +
 configure.ac                                       |   32 ++++++++++++-
 peas-demo/plugins/Makefile.am                      |    4 ++
 peas-demo/plugins/valahello/Makefile.am            |   22 +++++++++
 .../valahello/peasdemo-vala-hello-plugin.vala      |   49 ++++++++++++++++++++
 peas-demo/plugins/valahello/valahello.plugin       |    7 +++
 6 files changed, 114 insertions(+), 1 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index 768a5c3..70d75ad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,6 +51,7 @@ Makefile.in
 /missing
 /mkinstalldirs
 /omf.make
+/peas-demo/plugins/valahello/peasdemo-vala-hello-plugin.c
 /po/*.header
 /po/*.gmo
 /po/*.mo
diff --git a/configure.ac b/configure.ac
index 66c5003..1efe241 100644
--- a/configure.ac
+++ b/configure.ac
@@ -317,7 +317,7 @@ else
 	dnl it's not required for building libpeas, merely to use it properly.
 fi
 
-if test "$enable_python" = "yes" -a "$found_python" = "no"; then
+if test "$enable_python" = "yes" -a "$found_python" != "yes"; then
 	AC_MSG_ERROR([$found_python])
 fi
 
@@ -336,6 +336,34 @@ fi
 AM_CONDITIONAL([ENABLE_PYTHON],[test "$found_python" = "yes"])
 
 dnl ================================================================
+dnl Vala
+dnl ================================================================
+
+VALA_REQUIRED=0.11.1
+
+AC_ARG_ENABLE([vala],
+	      AS_HELP_STRING([--enable-vala],[Enable Vala support]),
+	      [enable_vala=$enableval],
+	      [enable_vala=auto])
+
+if test "$enable_vala" = "no"; then
+	found_vala="no (disabled, use --enable-vala to enable)"
+else
+	AM_PROG_VALAC($VALA_REQUIRED)
+	if test "$VALAC" = ""; then
+		found_vala="no (valac >= $VALA_REQUIRED not found)"
+	else
+		found_vala="yes"
+	fi
+fi
+
+if test "$enable_vala" = "yes" -a "$found_vala" != "yes"; then
+	AC_MSG_ERROR([$found_vala])
+fi
+
+AM_CONDITIONAL([ENABLE_VALA],[test "$found_vala" = "yes"])
+
+dnl ================================================================
 dnl Documentation
 dnl ================================================================
 
@@ -398,6 +426,7 @@ peas-demo/plugins/helloworld/Makefile
 peas-demo/plugins/pythonhello/Makefile
 peas-demo/plugins/secondtime/Makefile
 peas-demo/plugins/seedhello/Makefile
+peas-demo/plugins/valahello/Makefile
 po/Makefile.in
 tests/Makefile
 tests/libpeas/Makefile
@@ -435,4 +464,5 @@ Configuration:
         Glade Catalog                 : ${found_glade_catalog}
         Seed JS support               : ${found_seed}
         Python support                : ${found_python}
+        Vala support                  : ${found_vala}
 "
diff --git a/peas-demo/plugins/Makefile.am b/peas-demo/plugins/Makefile.am
index d2824e1..37ca9db 100644
--- a/peas-demo/plugins/Makefile.am
+++ b/peas-demo/plugins/Makefile.am
@@ -7,3 +7,7 @@ endif
 if ENABLE_SEED
 SUBDIRS += seedhello
 endif
+
+if ENABLE_VALA
+SUBDIRS += valahello
+endif
diff --git a/peas-demo/plugins/valahello/Makefile.am b/peas-demo/plugins/valahello/Makefile.am
new file mode 100644
index 0000000..e381653
--- /dev/null
+++ b/peas-demo/plugins/valahello/Makefile.am
@@ -0,0 +1,22 @@
+plugindir = $(libdir)/peas-demo/plugins/valahello
+
+INCLUDES = \
+	-I$(top_srcdir) 	\
+	$(PEAS_CFLAGS)		\
+	$(PEAS_GTK_CFLAGS)
+
+VALAFLAGS = \
+	--girdir $(top_builddir)/libpeas \
+	--girdir $(top_builddir)/libpeas-gtk \
+	--pkg PeasGtk-1.0 --pkg gtk+-3.0
+
+plugin_LTLIBRARIES = libvalahello.la
+
+libvalahello_la_SOURCES = peasdemo-vala-hello-plugin.vala
+
+libvalahello_la_LDFLAGS = $(PLUGIN_LIBTOOL_FLAGS)
+libvalahello_la_LIBADD  = $(PEAS_LIBS) $(PEAS_GTK_LIBS)
+
+plugin_DATA = valahello.plugin
+
+EXTRA_DIST = $(plugin_DATA)
diff --git a/peas-demo/plugins/valahello/peasdemo-vala-hello-plugin.vala b/peas-demo/plugins/valahello/peasdemo-vala-hello-plugin.vala
new file mode 100644
index 0000000..7b1906a
--- /dev/null
+++ b/peas-demo/plugins/valahello/peasdemo-vala-hello-plugin.vala
@@ -0,0 +1,49 @@
+namespace PeasDemo {
+  public class ValaHelloPlugin : Peas.ExtensionBase, Peas.Activatable {
+    private Gtk.Widget label;
+    public Object object { get; construct; }
+
+    public ValaHelloPlugin () {
+      Object ();
+    }
+
+    public void activate () {
+      var window = object as Gtk.Window;
+
+      label = new Gtk.Label ("Hello World from Vala!");
+      var box = window.get_child () as Gtk.Box;
+      box.pack_start (label);
+      label.show ();
+    }
+
+    public void deactivate () {
+      var window = object as Gtk.Window;
+
+      var box = window.get_child () as Gtk.Box;
+      box.remove (label);
+    }
+
+    public void update_state () {
+    }
+  }
+
+  public class ValaPluginConfig : Peas.ExtensionBase, PeasGtk.Configurable {
+    public ValaPluginConfig () {
+      Object ();
+    }
+
+    public Gtk.Widget create_configure_widget () {
+      string text = "This is a configuration dialog for the ValaHello plugin.";
+      return new Gtk.Label (text);
+    }
+  }
+}
+
+[ModuleInit]
+public void peas_register_types (GLib.TypeModule module) {
+  var objmodule = module as Peas.ObjectModule;
+  objmodule.register_extension_type (typeof (Peas.Activatable),
+                                     typeof (PeasDemo.ValaHelloPlugin));
+  objmodule.register_extension_type (typeof (PeasGtk.Configurable),
+                                     typeof (PeasDemo.ValaPluginConfig));
+}
diff --git a/peas-demo/plugins/valahello/valahello.plugin b/peas-demo/plugins/valahello/valahello.plugin
new file mode 100644
index 0000000..281b9c7
--- /dev/null
+++ b/peas-demo/plugins/valahello/valahello.plugin
@@ -0,0 +1,7 @@
+[Plugin]
+Module=valahello
+IAge=2
+Name=Vala also says Hello
+Description=Inserts a box containing "Hello World" in every window.
+Authors=Abderrahim Kitouni <a kitouni gmail com>
+Copyright=Copyright © 2010 Abderrahim Kitouni