Added support for libnotify-based desktop notifications...

...(patch #1179 by method).

changelog

@@ -25,6 +25,7 @@ Version 1.7.0+svn:
    * Removed the hidden option to disable the tips of the day
    * A click on a slider now properly sets the position
    * WML generated messages, labels and sounds are skiped during replay (bug #13519)
+   * Added support for desktop notifications (GTK/libnotify only for now, patch #1179)
  * WML Engine:
    * Made new turn, turn X, side turn and turn refresh events synchronous.
      (bug #10603)

configure.ac

@@ -278,6 +278,18 @@ AC_ARG_ENABLE([internal-data],
 		[internaldata=$enableval],
 		[internaldata=no])
 
+AC_ARG_ENABLE([notifications],
+		AS_HELP_STRING([--disable-notifications],
+			[disable OS-specific notifications]),
+		[notifications=$enableval],
+		[notifications=yes])
+
+AC_ARG_ENABLE([gtkmm],
+		AS_HELP_STRING([--disable-gtkmm],
+			[disable gtkmm support for notifications]),
+		[gtkmm=$enableval],
+		[gtkmm=yes])
+
 #if test "x$game" = "xno"
 #then
 #	python=no
@@ -845,6 +857,27 @@ PKG_CHECK_MODULES(LUA, [lua >= 5.1], , [PKG_CHECK_MODULES(LUA, [lua5.1 >= 5.1],
 CPPFLAGS="$CPPFLAGS $LUA_CFLAGS"
 LIBS="$LIBS $LUA_LIBS"
 
+#######################################################################
+# Check for different notifications systems                           #
+#######################################################################
+found_notifications=no
+if test "x$notifications" = "xyes"; then
+	if test "x$gtkmm" = "xyes"; then
+		PKG_CHECK_MODULES([GTKMM], [gtkmm-2.4 >= 2.8.0], [
+			PKG_CHECK_MODULES([LIBNOTIFY], [libnotifymm-1.0], [
+				CPPFLAGS="$CPPFLAGS $GTKMM_CFLAGS $LIBNOTIFY_CFLAGS"
+				LIBS="$LIBS $GTKMM_LIBS $LIBNOTIFY_LIBS"
+				found_notifications=yes
+				AC_DEFINE([HAVE_LIBNOTIFY],,[Define if you have Libnotify for GTK.])
+			], [AC_MSG_RESULT([no])])
+		], [AC_MSG_RESULT([no])])
+	fi
+	# tests for other notification systems
+fi
+AC_MSG_CHECKING([for notifications])
+AC_MSG_RESULT([$found_notifications])
+
+
 #######################################################################
 # Check for boost iostreams                                           #
 #######################################################################

src/game_display.cpp

@@ -21,6 +21,10 @@
 
 #include "game_display.hpp"
 
+#ifdef HAVE_LIBNOTIFY
+#include <libnotifymm-1.0/libnotifymm.h>
+#endif
+
 #include "actions.hpp"
 #include "foreach.hpp"
 #include "halo.hpp"
@@ -1025,6 +1029,32 @@ std::string game_display::current_team_name() const
 	return std::string();
 }
 
+void game_display::send_notification(const std::string& owner, const std::string& message)
+{
+#ifdef HAVE_LIBNOTIFY
+
+	// SDL_APPACTIVE, SDL_APPINPUTFOCUS, SDL_APPMOUSEFOCUS
+	Uint8 app_state = SDL_GetAppState();
+
+	// Only show notification if the window is not visible 
+	if((SDL_APPACTIVE & app_state) != 0)
+	{
+		// Or if window is in background
+		if((SDL_APPMOUSEFOCUS & app_state) != 0)
+		{
+			return;
+		}
+	}
+
+	Notify::init("Wesnoth");
+
+	// I tried to use the fancy Gtk::IconTheme stuff but it didn't seem worth it. -- method
+	Glib::ustring wesnoth_icon_info =  game_config::path + "images/wesnoth-icon-small.png";
+	Notify::Notification notification(owner, message, wesnoth_icon_info);
+	notification.show();
+#endif
+}
+
 void game_display::set_team(size_t teamindex, bool show_everything)
 {
 	assert(teamindex < teams_.size());
@@ -1162,6 +1192,9 @@ void game_display::add_chat_message(const time_t& time, const std::string& speak
 		rect.x + chat_message_x + font::get_floating_label_rect(speaker_handle).w,rect.y+ypos,
 		0,0,-1,rect,font::LEFT_ALIGN,&chat_message_bg,chat_message_border);
 
+	// Send system notification if appropriate.
+	send_notification(speaker, message);
+
 	chat_messages_.push_back(chat_message(speaker_handle,message_handle));
 
 	prune_chat_messages();

src/game_display.hpp

@@ -228,6 +228,8 @@ public:
 	//void draw_terrain_palette(int x, int y, terrain_type::TERRAIN selected);
 	t_translation::t_terrain get_terrain_on(int palx, int paly, int x, int y);
 
+	void send_notification(const std::string& owner, const std::string& message);
+
 	/**
 	 * Sets the team controlled by the player using the computer.
 	 *

src/playmp_controller.cpp

@@ -23,6 +23,7 @@
 #include "savegame.hpp"
 #include "sound.hpp"
 #include "upload_log.hpp"
+#include "formula_string_utils.hpp"
 
 static lg::log_domain log_engine("engine");
 #define LOG_NG LOG_STREAM(info, log_engine)
@@ -142,6 +143,14 @@ void playmp_controller::play_side(const unsigned int team_index, bool save){
 		}
 	} while (player_type_changed_);
 	//keep looping if the type of a team (human/ai/networked) has changed mid-turn
+
+	// Notify on turn change.
+	utils::string_map player;
+	player["name"] = current_team().current_player();
+	std::string turn_notification_msg = _("$name has taken control");
+	turn_notification_msg = utils::interpolate_variables_into_string(turn_notification_msg, &player);
+
+	gui_->send_notification(_("Turn changed"), turn_notification_msg);
 }
 
 void playmp_controller::before_human_turn(bool save){