diff options
Diffstat (limited to 'libtopmenu-client/topmenu-monitor.c')
| -rw-r--r-- | libtopmenu-client/topmenu-monitor.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/libtopmenu-client/topmenu-monitor.c b/libtopmenu-client/topmenu-monitor.c new file mode 100644 index 0000000..abd7522 --- /dev/null +++ b/libtopmenu-client/topmenu-monitor.c @@ -0,0 +1,163 @@ +#include <X11/Xatom.h> +#include <gtk/gtk.h> +#include <gdk/gdkx.h> + +#include "../global.h" + +#include "topmenu-monitor.h" + +struct _TopMenuMonitorPrivate +{ + GdkAtom atom_selection; + GtkClipboard *selection; + GdkWindow *cur_server; +}; + +enum { + PROP_0, + PROP_AVAILABLE, + N_PROPERTIES +}; + +G_DEFINE_TYPE(TopMenuMonitor, topmenu_monitor, G_TYPE_OBJECT) + +#define TOPMENU_MONITOR_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), TOPMENU_TYPE_MONITOR, TopMenuMonitorPrivate)) + +static GParamSpec *properties[N_PROPERTIES] = { NULL }; + +static void topmenu_monitor_update(TopMenuMonitor *self); + +static void handle_clipboard_owner_change(GtkClipboard *clipboard, GdkEvent *event, TopMenuMonitor *self) +{ + topmenu_monitor_update(self); +} + +static GdkFilterReturn handle_cur_server_event(GdkXEvent *xevent, GdkEvent *event, gpointer data) +{ + XEvent *e = (XEvent*)xevent; + if (e->type == DestroyNotify) { + g_debug("Current server has been destroyed"); + TopMenuMonitor *self = TOPMENU_MONITOR(data); + if (self->priv->cur_server && + GDK_WINDOW_XWINDOW(self->priv->cur_server) == e->xdestroywindow.window) { + topmenu_monitor_update(self); + } + } + return GDK_FILTER_CONTINUE; +} + +static void topmenu_monitor_set_cur_server(TopMenuMonitor *self, GdkWindow *window) +{ + if (self->priv->cur_server == window) { + // Nothing to do + return; + } + g_debug("Setting current server to 0x%lx", GDK_WINDOW_XWINDOW(window)); + if (self->priv->cur_server) { + gdk_window_remove_filter(window, handle_cur_server_event, self); + gdk_window_unref(self->priv->cur_server); + self->priv->cur_server = 0; + } + if (window) { + gdk_window_set_events(window, gdk_window_get_events(window) | GDK_STRUCTURE_MASK); + gdk_window_add_filter(window, handle_cur_server_event, self); + self->priv->cur_server = window; + } + if (self->priv->cur_server && !self->available) { + // Signal availability + self->available = TRUE; + g_object_notify_by_pspec(G_OBJECT(self), properties[PROP_AVAILABLE]); + } else if (!self->priv->cur_server && self->available) { + // Signal no availability + self->available = FALSE; + g_object_notify_by_pspec(G_OBJECT(self), properties[PROP_AVAILABLE]); + } +} + +static void topmenu_monitor_update(TopMenuMonitor *self) +{ + GdkScreen *screen = gdk_screen_get_default(); + GdkDisplay *display = gdk_screen_get_display(screen); + + Display *xdpy = GDK_DISPLAY_XDISPLAY(display); + Atom atom = gdk_x11_atom_to_xatom_for_display(display, self->priv->atom_selection); + + Window xwin = XGetSelectionOwner(xdpy, atom); + + if (xwin) { + GdkWindow *window = gdk_x11_window_foreign_new_for_display(display, xwin); + topmenu_monitor_set_cur_server(self, window); + } else { + topmenu_monitor_set_cur_server(self, NULL); + } +} + +static void topmenu_monitor_get_property(GObject *obj, guint property_id, GValue *value, GParamSpec *pspec) +{ + TopMenuMonitor *self = TOPMENU_MONITOR(obj); + switch (property_id) { + case PROP_AVAILABLE: + g_value_set_boolean(value, self->available); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, property_id, pspec); + } +} + +static void topmenu_monitor_dispose(GObject *obj) +{ + TopMenuMonitor *self = TOPMENU_MONITOR(obj); + if (self->priv->cur_server) { + gdk_window_remove_filter(self->priv->cur_server, + handle_cur_server_event, self); + gdk_window_unref(self->priv->cur_server); + self->priv->cur_server = 0; + } + self->priv->selection = NULL; + G_OBJECT_CLASS(topmenu_monitor_parent_class)->dispose(obj); +} + +static void topmenu_monitor_class_init(TopMenuMonitorClass *klass) +{ + GObjectClass *obj_class = G_OBJECT_CLASS(klass); + obj_class->get_property = topmenu_monitor_get_property; + obj_class->dispose = topmenu_monitor_dispose; + + properties[PROP_AVAILABLE] = g_param_spec_boolean("available", + "TopMenu's availability", + "Set to TRUE whether a TopMenu server is currently available", + FALSE, + G_PARAM_STATIC_STRINGS | G_PARAM_READABLE); + g_object_class_install_properties(obj_class, N_PROPERTIES, properties); + + g_type_class_add_private(klass, sizeof(TopMenuMonitorPrivate)); +} + +static void topmenu_monitor_init(TopMenuMonitor *self) +{ + self->priv = TOPMENU_MONITOR_GET_PRIVATE(self); + self->available = FALSE; + + self->priv->atom_selection = gdk_atom_intern_static_string(ATOM_TOPMENU_SERVER_SELECTION); + self->priv->selection = gtk_clipboard_get(self->priv->atom_selection); + self->priv->cur_server = NULL; + + g_signal_connect_object(self->priv->selection, "owner-change", + G_CALLBACK(handle_clipboard_owner_change), self, 0); + + topmenu_monitor_update(self); +} + +TopMenuMonitor * topmenu_monitor_get_instance() +{ + static TopMenuMonitor *instance = NULL; + if (!instance) { + instance = TOPMENU_MONITOR(g_object_new(TOPMENU_TYPE_MONITOR, NULL)); + } + return instance; +} + +gboolean topmenu_monitor_is_topmenu_available(TopMenuMonitor * self) +{ + return self->available; +} |