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-rw-r--r--src/daemon/engines.c338
1 files changed, 338 insertions, 0 deletions
diff --git a/src/daemon/engines.c b/src/daemon/engines.c
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+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * Copyright (C) 2006 Christian Hammond <[email protected]>
+ * Copyright (C) 2005 John (J5) Palmieri <[email protected]>
+ * Copyright (C) 2010 Red Hat, Inc.
+ * Copyright (C) 2011 Perberos <[email protected]>
+ *
+ * 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 <mateconf/mateconf-client.h>
+#include "daemon.h"
+#include "engines.h"
+
+typedef struct {
+ GModule* module;
+ guint ref_count;
+
+ /* callbacks */
+ 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);
+ gboolean (*get_always_stack) (GtkWindow* nw);
+
+} ThemeEngine;
+
+static guint theme_prop_notify_id = 0;
+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);
+ BIND_OPTIONAL_FUNC(get_always_stack);
+
+ if (!engine->theme_check_init(NOTIFICATION_DAEMON_MAJOR_VERSION, NOTIFICATION_DAEMON_MINOR_VERSION, NOTIFICATION_DAEMON_MICRO_VERSION))
+ {
+ g_warning ("Theme doesn't work with this version of mate-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);
+}
+
+static gboolean theme_engine_destroy(ThemeEngine* engine)
+{
+ destroy_engine(engine);
+ return FALSE;
+}
+
+static void theme_engine_unref(ThemeEngine* engine)
+{
+ engine->ref_count--;
+
+ if (engine->ref_count == 0)
+ {
+ /*
+ * Destroy the engine in an idle loop since the last reference
+ * might have been the one of a notification which is being
+ * destroyed and that still has references to the engine
+ * module. This way, we're sure the notification is completely
+ * destroyed before the engine is.
+ */
+ g_idle_add((GSourceFunc) theme_engine_destroy, engine);
+ }
+}
+
+static void theme_changed_cb(MateConfClient* client, guint cnxn_id, MateConfEntry* entry, gpointer user_data)
+{
+ if (active_engine == NULL)
+ {
+ return;
+ }
+
+ theme_engine_unref(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)
+ {
+ MateConfClient* client = mateconf_client_get_default();
+ char* enginename = mateconf_client_get_string(client, MATECONF_KEY_THEME, NULL);
+
+ if (theme_prop_notify_id == 0)
+ {
+ theme_prop_notify_id = mateconf_client_notify_add(client, MATECONF_KEY_THEME, theme_changed_cb, NULL, NULL, NULL);
+ }
+
+ g_object_unref(client);
+
+ 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;
+}
+
+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);
+}
+
+gboolean theme_get_always_stack(GtkWindow* nw)
+{
+ ThemeEngine* engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
+
+ if (engine->get_always_stack != NULL)
+ {
+ return engine->get_always_stack(nw);
+ }
+ else
+ {
+ return FALSE;
+ }
+}
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