1 files changed, 308 insertions, 0 deletions
diff --git a/src/daemon/engines.c b/src/daemon/engines.c
new file mode 100644
index 0000000..69efc39
--- /dev/null
+++ b/src/daemon/engines.c
@@ -0,0 +1,308 @@
+/* $Id: engines.c 2114 2006-10-22 14:44:42Z nick $
+ *
+ * Copyright (C) 2006 Christian Hammond <chipx86@chipx86.com>
+ * Copyright (C) 2005 John (J5) Palmieri <johnp@redhat.com>
+ * Copyright (C) 2006 Nick Schermer <nick@xfce.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include <libxfce4util/libxfce4util.h>
+#include "daemon.h"
+#include "engines.h"
+
+typedef struct
+{
+	GModule *module;
+	guint ref_count;
+
+	gboolean (*theme_check_init)(unsigned int major_ver,
+								 unsigned int minor_ver,
+								 unsigned int micro_ver);
+	void (*get_theme_info)(char **theme_name, char **theme_ver,
+						   char **author, char **homepage);
+	GtkWindow *(*create_notification)(UrlClickedCb url_clicked_cb);
+	void (*destroy_notification)(GtkWindow *nw);
+	void (*show_notification)(GtkWindow *nw);
+	void (*hide_notification)(GtkWindow *nw);
+	void (*set_notification_hints)(GtkWindow *nw, GHashTable *hints);
+	void (*set_notification_text)(GtkWindow *nw, const char *summary,
+								  const char *body);
+	void (*set_notification_icon)(GtkWindow *nw, GdkPixbuf *pixbuf);
+	void (*set_notification_arrow)(GtkWindow *nw, gboolean visible,
+								   int x, int y);
+	void (*add_notification_action)(GtkWindow *nw, const char *label,
+									const char *key, GCallback cb);
+	void (*clear_notification_actions)(GtkWindow *nw);
+	void (*move_notification)(GtkWindow *nw, int x, int y);
+	void (*set_notification_timeout)(GtkWindow *nw, glong timeout);
+	void (*notification_tick)(GtkWindow *nw, glong timeout);
+
+} ThemeEngine;
+
+static ThemeEngine *active_engine = NULL;
+
+static ThemeEngine *
+load_theme_engine(const char *name)
+{
+	ThemeEngine *engine;
+	char *filename;
+	char *path;
+
+	filename = g_strdup_printf("lib%s.so", name);
+	path = g_build_filename(ENGINES_DIR, filename, NULL);
+	g_free(filename);
+
+	engine = g_new0(ThemeEngine, 1);
+	engine->ref_count = 1;
+	engine->module = g_module_open(path, G_MODULE_BIND_LAZY);
+
+	g_free(path);
+
+	if (engine->module == NULL)
+		goto error;
+
+#define BIND_REQUIRED_FUNC(name) \
+	if (!g_module_symbol(engine->module, #name, (gpointer *)&engine->name)) \
+	{ \
+		/* Too harsh! Fall back to default. */ \
+		g_warning("Theme doesn't provide the required function '%s'", #name); \
+		goto error; \
+	}
+
+#define BIND_OPTIONAL_FUNC(name) \
+	g_module_symbol(engine->module, #name, (gpointer *)&engine->name);
+
+	BIND_REQUIRED_FUNC(theme_check_init);
+	BIND_REQUIRED_FUNC(get_theme_info);
+	BIND_REQUIRED_FUNC(create_notification);
+	BIND_REQUIRED_FUNC(set_notification_text);
+	BIND_REQUIRED_FUNC(set_notification_icon);
+	BIND_REQUIRED_FUNC(set_notification_arrow);
+	BIND_REQUIRED_FUNC(add_notification_action);
+	BIND_REQUIRED_FUNC(clear_notification_actions);
+	BIND_REQUIRED_FUNC(move_notification);
+
+	BIND_OPTIONAL_FUNC(destroy_notification);
+	BIND_OPTIONAL_FUNC(show_notification);
+	BIND_OPTIONAL_FUNC(hide_notification);
+	BIND_OPTIONAL_FUNC(set_notification_timeout);
+	BIND_OPTIONAL_FUNC(set_notification_hints);
+	BIND_OPTIONAL_FUNC(notification_tick);
+
+	if (!engine->theme_check_init(NOTIFICATION_DAEMON_MAJOR_VERSION,
+								  NOTIFICATION_DAEMON_MINOR_VERSION,
+								  NOTIFICATION_DAEMON_MICRO_VERSION))
+	{
+		g_error("Theme doesn't work with this version of notification-daemon");
+		goto error;
+	}
+
+	return engine;
+
+error:
+	if (engine->module != NULL && !g_module_close(engine->module))
+		g_warning("%s: %s", filename, g_module_error());
+
+	g_free(engine);
+	return NULL;
+}
+
+static void
+destroy_engine(ThemeEngine *engine)
+{
+	g_assert(engine->ref_count == 0);
+
+	if (active_engine == engine)
+		active_engine = NULL;
+
+	g_module_close(engine->module);
+	g_free(engine);
+}
+
+void
+theme_changed_cb(void)
+{
+	if (active_engine == NULL)
+		return;
+
+	active_engine->ref_count--;
+
+	if (active_engine->ref_count == 0)
+		destroy_engine(active_engine);
+
+	/* This is no longer the true active engine, so reset this. */
+	active_engine = NULL;
+}
+
+static ThemeEngine *
+get_theme_engine(void)
+{
+	if (active_engine == NULL)
+	{
+		gchar *enginename;
+
+		enginename = xfce_load_setting ("engine_name", "standard");
+
+		if (enginename == NULL)
+		{
+			active_engine = load_theme_engine("standard");
+			g_assert(active_engine != NULL);
+		}
+		else
+		{
+			active_engine = load_theme_engine(enginename);
+
+			if (active_engine == NULL)
+			{
+				g_warning("Unable to load theme engine '%s'", enginename);
+				active_engine = load_theme_engine("standard");
+			}
+
+			g_free(enginename);
+
+			g_assert(active_engine != NULL);
+		}
+	}
+
+	return active_engine;
+}
+
+static void
+theme_engine_unref(ThemeEngine *engine)
+{
+	engine->ref_count--;
+
+	if (engine->ref_count == 0)
+		destroy_engine(engine);
+}
+
+GtkWindow *
+theme_create_notification(UrlClickedCb url_clicked_cb)
+{
+	ThemeEngine *engine = get_theme_engine();
+	GtkWindow *nw = engine->create_notification(url_clicked_cb);
+	g_object_set_data_full(G_OBJECT(nw), "_theme_engine", engine,
+						   (GDestroyNotify)theme_engine_unref);
+	engine->ref_count++;
+	return nw;
+}
+
+void
+theme_destroy_notification(GtkWindow *nw)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+
+	if (engine->destroy_notification != NULL)
+		engine->destroy_notification(nw);
+	else
+		gtk_widget_destroy(GTK_WIDGET(nw));
+}
+
+void
+theme_show_notification(GtkWindow *nw)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+
+	if (engine->show_notification != NULL)
+		engine->show_notification(nw);
+	else
+		gtk_widget_show(GTK_WIDGET(nw));
+}
+
+void
+theme_hide_notification(GtkWindow *nw)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+
+	if (engine->hide_notification != NULL)
+		engine->hide_notification(nw);
+	else
+		gtk_widget_hide(GTK_WIDGET(nw));
+}
+
+void
+theme_set_notification_hints(GtkWindow *nw, GHashTable *hints)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+
+	if (engine->set_notification_hints != NULL)
+		engine->set_notification_hints(nw, hints);
+}
+
+void
+theme_set_notification_timeout(GtkWindow *nw, glong timeout)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+
+	if (engine->set_notification_timeout != NULL)
+		engine->set_notification_timeout(nw, timeout);
+}
+
+void
+theme_notification_tick(GtkWindow *nw, glong remaining)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+
+	if (engine->notification_tick != NULL)
+		engine->notification_tick(nw, remaining);
+}
+
+void
+theme_set_notification_text(GtkWindow *nw, const char *summary,
+							const char *body)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+	engine->set_notification_text(nw, summary, body);
+}
+
+void
+theme_set_notification_icon(GtkWindow *nw, GdkPixbuf *pixbuf)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+	engine->set_notification_icon(nw, pixbuf);
+}
+
+void
+theme_set_notification_arrow(GtkWindow *nw, gboolean visible, int x, int y)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+	engine->set_notification_arrow(nw, visible, x, y);
+}
+
+void
+theme_add_notification_action(GtkWindow *nw, const char *label,
+							  const char *key, GCallback cb)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+	engine->add_notification_action(nw, label, key, cb);
+}
+
+void
+theme_clear_notification_actions(GtkWindow *nw)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+	engine->clear_notification_actions(nw);
+}
+
+void
+theme_move_notification(GtkWindow *nw, int x, int y)
+{
+	ThemeEngine *engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+	engine->move_notification(nw, x, y);
+}