diff options
Diffstat (limited to 'capplets/common/wm-common.c')
| -rw-r--r-- | capplets/common/wm-common.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/capplets/common/wm-common.c b/capplets/common/wm-common.c new file mode 100644 index 00000000..31cd503d --- /dev/null +++ b/capplets/common/wm-common.c @@ -0,0 +1,184 @@ +#include <X11/Xatom.h> +#include <gdk/gdkx.h> +#include <gdk/gdk.h> +#include <string.h> +#include <glib.h> +#include <glib-object.h> +#include "wm-common.h" + +typedef struct _WMCallbackData +{ + GFunc func; + gpointer data; +} WMCallbackData; + +/* Our WM Window */ +static Window wm_window = None; + +static char * +wm_common_get_window_manager_property (Atom atom) +{ + Atom utf8_string, type; + int result; + char *retval; + int format; + gulong nitems; + gulong bytes_after; + gchar *val; + + if (wm_window == None) + return NULL; + + utf8_string = XInternAtom (GDK_DISPLAY (), "UTF8_STRING", False); + + gdk_error_trap_push (); + + val = NULL; + result = XGetWindowProperty (GDK_DISPLAY (), + wm_window, + atom, + 0, G_MAXLONG, + False, utf8_string, + &type, &format, &nitems, + &bytes_after, (guchar **) &val); + + if (gdk_error_trap_pop () || result != Success || + type != utf8_string || format != 8 || nitems == 0 || + !g_utf8_validate (val, nitems, NULL)) + { + retval = NULL; + } + else + { + retval = g_strndup (val, nitems); + } + + if (val) + XFree (val); + + return retval; +} + +char* +wm_common_get_current_window_manager (void) +{ + Atom atom = XInternAtom (GDK_DISPLAY (), "_NET_WM_NAME", False); + char *result; + + result = wm_common_get_window_manager_property (atom); + if (result) + return result; + else + return g_strdup (WM_COMMON_UNKNOWN); +} + +char** +wm_common_get_current_keybindings (void) +{ + Atom keybindings_atom = XInternAtom (GDK_DISPLAY (), "_MATE_WM_KEYBINDINGS", False); + char *keybindings = wm_common_get_window_manager_property (keybindings_atom); + char **results; + + if (keybindings) + { + char **p; + results = g_strsplit(keybindings, ",", -1); + for (p = results; *p; p++) + g_strstrip (*p); + g_free (keybindings); + } + else + { + Atom wm_atom = XInternAtom (GDK_DISPLAY (), "_NET_WM_NAME", False); + char *wm_name = wm_common_get_window_manager_property (wm_atom); + char *to_copy[] = { NULL, NULL }; + + to_copy[0] = wm_name ? wm_name : WM_COMMON_UNKNOWN; + + results = g_strdupv (to_copy); + g_free (wm_name); + } + + return results; +} + +static void +update_wm_window (void) +{ + Window *xwindow; + Atom type; + gint format; + gulong nitems; + gulong bytes_after; + + XGetWindowProperty (GDK_DISPLAY (), GDK_ROOT_WINDOW (), + XInternAtom (GDK_DISPLAY (), "_NET_SUPPORTING_WM_CHECK", False), + 0, G_MAXLONG, False, XA_WINDOW, &type, &format, + &nitems, &bytes_after, (guchar **) &xwindow); + + if (type != XA_WINDOW) + { + wm_window = None; + return; + } + + gdk_error_trap_push (); + XSelectInput (GDK_DISPLAY (), *xwindow, StructureNotifyMask | PropertyChangeMask); + XSync (GDK_DISPLAY (), False); + + if (gdk_error_trap_pop ()) + { + XFree (xwindow); + wm_window = None; + return; + } + + wm_window = *xwindow; + XFree (xwindow); +} + +static GdkFilterReturn +wm_window_event_filter (GdkXEvent *xev, + GdkEvent *event, + gpointer data) +{ + WMCallbackData *ncb_data = (WMCallbackData*) data; + XEvent *xevent = (XEvent *)xev; + + if ((xevent->type == DestroyNotify && + wm_window != None && xevent->xany.window == wm_window) || + (xevent->type == PropertyNotify && + xevent->xany.window == GDK_ROOT_WINDOW () && + xevent->xproperty.atom == (XInternAtom (GDK_DISPLAY (), "_NET_SUPPORTING_WM_CHECK", False))) || + (xevent->type == PropertyNotify && + wm_window != None && xevent->xany.window == wm_window && + xevent->xproperty.atom == (XInternAtom (GDK_DISPLAY (), "_NET_WM_NAME", False)))) + { + update_wm_window (); + (* ncb_data->func) ((gpointer)wm_common_get_current_window_manager(), + ncb_data->data); + } + + return GDK_FILTER_CONTINUE; +} + +void +wm_common_register_window_manager_change (GFunc func, + gpointer data) +{ + WMCallbackData *ncb_data; + + ncb_data = g_new0 (WMCallbackData, 1); + + ncb_data->func = func; + ncb_data->data = data; + + gdk_window_add_filter (NULL, wm_window_event_filter, ncb_data); + + update_wm_window (); + + XSelectInput (GDK_DISPLAY (), GDK_ROOT_WINDOW (), PropertyChangeMask); + XSync (GDK_DISPLAY (), False); +} + + |