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gnome-control-center/libwindow-settings/gnome-wm-manager.c
Seth Nickell 7ae28ca59d Get rid of "get" calls, since we should just rely on the GConf settings 
2002-06-04  Seth Nickell  <snickell@stanford.edu>

	* gnome-window-manager.c: (gnome_window_manager_new),
	(gnome_window_manager_class_init):
	* gnome-window-manager.h:

	Get rid of "get" calls, since we should just rely on the GConf settings being right.
	Otherwise you get ambiguous problems with merging settings, figuring out which
	takes predecedence, etc.
2002-06-05 00:40:01 +00:00

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#include <config.h>
#include "gnome-wm-manager.h"
#include "wm-properties.h"
#include <gtk/gtk.h>
#include <libgnomeui/gnome-client.h>
#include <gnome.h>
/* prototypes */
static void restart (gboolean force);
static void revert_callback (void);
static void cancel_callback (void);
static void update_session (void);
static WindowManager *selected_wm = NULL;
/* Enumeration describing the current state of the capplet.
* in any other state than idle, all controls are !sensitive.
*/
typedef enum {
STATE_IDLE,
STATE_TRY,
STATE_REVERT,
STATE_OK,
STATE_CANCEL,
STATE_TRY_REVERT, /* Currently trying, revert afterwards */
STATE_TRY_CANCEL /* Currently trying, cancel afterwards */
} StateType;
/* Current state
*/
static StateType state = STATE_IDLE;
/* Set TRUE when we've exited the main loop, but restart_pending
*/
static gboolean quit_pending = FALSE;
/* Set TRUE when we're waiting for the WM to restart
*/
static gboolean restart_pending = FALSE;
static GtkWidget *capplet;
void
gnome_wm_manager_init (GtkWidget *some_window)
{
wm_list_init();
selected_wm = wm_list_get_current();
}
GList *
gnome_wm_manager_get_list (void)
{
GList *wm_ditem;
GList *wms = NULL;
GnomeDesktopItem *ditem;
for (wm_ditem = window_managers; wm_ditem != NULL; wm_ditem = wm_ditem->next) {
ditem = ((WindowManager *)wm_ditem->data)->dentry;
wms = g_list_prepend (wms, gnome_window_manager_new (ditem));
}
return wms;
}
void
gnome_wm_manager_set_current (GnomeWindowManager *wm)
{
/* this line is bogus */
/*selected_wm = gnome_window_manager_get_ditem (wm);*/
}
GnomeWindowManager *
gnome_wm_manager_get_current (void)
{
return GNOME_WINDOW_MANAGER (gnome_window_manager_new (wm_list_get_current()->dentry));
}
void gnome_wm_manager_change_wm_to_settings (void)
{
state = STATE_TRY;
restart(FALSE);
wm_list_set_current (selected_wm);
wm_list_save ();
update_session ();
}
gboolean
gnome_wm_manager_same_wm (GnomeWindowManager *wm1, GnomeWindowManager *wm2)
{
GnomeDesktopItem *item1, *item2;
const char *location1, *location2;
gboolean same;
item1 = gnome_window_manager_get_ditem (wm1);
item2 = gnome_window_manager_get_ditem (wm2);
location1 = gnome_desktop_item_get_location (item1);
location2 = gnome_desktop_item_get_location (item2);
same = (strcmp (location1, location2) == 0);
gnome_desktop_item_unref (item1);
gnome_desktop_item_unref (item2);
return same;
}
static GtkWidget *restart_dialog = NULL;
static GtkWidget *restart_label = NULL;
static guint restart_dialog_timeout;
static gchar *restart_name = NULL;
/* Time until dialog times out */
static gdouble restart_remaining_time;
static gint restart_displayed_time;
static GnomeClient *client = NULL;
/* The possible transitions between states are described below.
*
* operation | try revert ok cancel finish
* ===========+=================================================
* IDLE | TRY REVERT OK CANCEL
* TRY | TRY_REVERT OK TRY_CANCEL IDLE
* REVERT | CANCEL CANCEL IDLE
* OK | (quit)
* CANCEL | (quit)
* TRY_REVERT | TRY_CANCEL TRY_CANCEL REVERT
* TRY_CANCEL | CANCEL
*
* When a restart fails, there are three cases
*
* (1) The failure was because the current window manager didn't
* die. We inform the user of the situation, and then
* abort the operation.
*
* (2) The window manager didn't start, and we don't have a
* a fallback. We pop up a error dialog, tell the user
* to start a new window manager, and abort the operation.
*
* (3) The window manager didn't start, and we previously had a
* window manager runnning. We pop up a warning dialog,
* then try to go back to the old window manager.
*
* operation | (1) (2) (3)
* ===========+=================================================
* IDLE |
* TRY | IDLE IDLE TRY
* REVERT | IDLE IDLE REVERT
* OK | (quit) (quit) OK
* CANCEL | (quit) (quit) CANCEL
* TRY_REVERT | REVERT REVERT REVERT
* TRY_CANCEL | CANCEL CANCEL CANCEL
*/
static void
restart_label_update (void)
{
gchar *tmp;
if ((gint)restart_remaining_time != restart_displayed_time) {
restart_displayed_time = restart_remaining_time;
tmp = g_strdup_printf (_("Starting %s\n"
"(%d seconds left before operation times out)"),
restart_name,
restart_displayed_time);
gtk_label_set_text (GTK_LABEL (restart_label), tmp);
g_free (tmp);
}
}
static gboolean
restart_dialog_raise (gpointer data)
{
if (restart_dialog && GTK_WIDGET_REALIZED (restart_dialog)) {
restart_remaining_time -= 0.25;
restart_label_update();
gdk_window_raise (restart_dialog->window);
}
return TRUE;
}
static void
restart_dialog_destroyed (GtkWidget *widget)
{
if (restart_dialog_timeout) {
gtk_timeout_remove (restart_dialog_timeout);
restart_dialog_timeout = 0;
}
restart_dialog = NULL;
}
static void
show_restart_dialog (gchar *name)
{
GtkWidget *hbox;
GtkWidget *frame;
GtkWidget *pixmap;
gchar *tmp;
if (!restart_dialog) {
restart_dialog = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_position (GTK_WINDOW (restart_dialog),
GTK_WIN_POS_CENTER);
gtk_signal_connect (GTK_OBJECT (restart_dialog), "destroy",
GTK_SIGNAL_FUNC (restart_dialog_destroyed),
&restart_dialog);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (restart_dialog), frame);
hbox = gtk_hbox_new (FALSE, GNOME_PAD);
gtk_container_set_border_width (GTK_CONTAINER (hbox), GNOME_PAD);
gtk_container_add (GTK_CONTAINER (frame), hbox);
tmp = gnome_unconditional_pixmap_file("gnome-info.png");
if (tmp) {
pixmap = gnome_pixmap_new_from_file(tmp);
g_free(tmp);
gtk_box_pack_start (GTK_BOX (hbox), pixmap, FALSE, FALSE, 0);
}
restart_label = gtk_label_new ("");
gtk_box_pack_start (GTK_BOX (hbox), restart_label, FALSE, FALSE, GNOME_PAD);
}
if (!restart_dialog_timeout) {
restart_dialog_timeout = gtk_timeout_add (250, restart_dialog_raise, NULL);
}
restart_remaining_time = 10.0;
restart_displayed_time = -1;
if (restart_name)
g_free (restart_name);
restart_name = g_strdup (name);
restart_label_update ();
gtk_widget_show_all (restart_dialog);
}
static void
hide_restart_dialog (void)
{
if (restart_dialog)
gtk_widget_destroy (restart_dialog);
}
static void
init_session (void)
{
GnomeClientFlags flags;
gint token;
return;
client = gnome_master_client ();
flags = gnome_client_get_flags (client);
if (flags & GNOME_CLIENT_IS_CONNECTED) {
/*token = gnome_startup_acquire_token("GNOME_WM_PROPERTIES",
gnome_client_get_id(client));*/
if (token)
printf ("broken\n");
/*update_session();*/
else {
gnome_client_set_restart_style (client,
GNOME_RESTART_NEVER);
gnome_client_flush (client);
}
}
}
static void
update_session (void)
{
WindowManager *current_wm = wm_list_get_current();
//gchar *session_args[3];
if (!current_wm)
return;
if (current_wm->session_managed) {
gnome_client_set_restart_style (client,
GNOME_RESTART_NEVER);
} else {
g_warning ("We don't properly handle non-session managed Window Managers right now");
}
//else {
// session_args[0] = argv0;
// session_args[1] = "--init-session-settings";
// session_args[2] = NULL;
// /* We use a priority of 15 so that we start after
// * session-managed WM's (priority 10), for safety.
/// */
// gnome_client_set_priority (client, 15);
// gnome_client_set_restart_style (client,
// GNOME_RESTART_ANYWAY);
// gnome_client_set_restart_command (client, 2,
// session_args);
//}
gnome_client_flush (client);
}
static void
init_callback (WMResult result, gpointer data)
{
switch (result) {
case WM_SUCCESS:
break;
case WM_ALREADY_RUNNING:
g_warning (_("wm-properties-capplet: Unable to initialize window manager.\n"
"\tAnother window manager is already running and could not be killed\n"));
break;
case WM_CANT_START:
g_warning (_("wm-properties-capplet: Unable to initialize window manager.\n"
"\t'%s' didn't start\n"), (gchar *)data);
break;
}
g_free (data);
gtk_main_quit ();
}
static void
restart_finalize ()
{
wm_list_set_current (selected_wm);
hide_restart_dialog();
switch (state) {
case STATE_TRY:
case STATE_REVERT:
gtk_widget_set_sensitive (capplet, TRUE);
//update_gui();
state = STATE_IDLE;
break;
case STATE_OK:
case STATE_CANCEL:
if (quit_pending)
gtk_main_quit();
break;
default:
g_warning ("Finalize in state %d!!!\n", state);
return;
}
restart_pending = FALSE;
}
static void
restart_failure (WMResult reason)
{
GtkWidget *msgbox;
WindowManager *current_wm;
gchar *msg = NULL;
gboolean modal = FALSE;
current_wm = wm_list_get_current ();
/* Did the previous window manager not die?
*/
if (reason == WM_ALREADY_RUNNING) {
msg = g_strdup (_("Previous window manager did not die\n"));
switch (state) {
case STATE_TRY:
case STATE_REVERT:
case STATE_OK:
case STATE_CANCEL:
selected_wm = current_wm;
restart_finalize ();
break;
case STATE_TRY_REVERT:
revert_callback ();
break;
case STATE_TRY_CANCEL:
cancel_callback ();
break;
default:
g_warning ("Failure in state %d!!!\n", state);
return;
}
}
/* Is there something reasonable to try to fall back to?
*/
else if (current_wm != selected_wm) {
switch (state) {
case STATE_TRY:
case STATE_REVERT:
case STATE_OK:
case STATE_CANCEL:
msg = g_strdup_printf (_("Could not start '%s'.\n"
"Falling back to previous window manager '%s'\n"),
selected_wm?gnome_desktop_item_get_string (selected_wm->dentry, GNOME_DESKTOP_ITEM_NAME):"Unknown",
current_wm?gnome_desktop_item_get_string (current_wm->dentry, GNOME_DESKTOP_ITEM_NAME):"Unknown");
selected_wm = current_wm;
restart(TRUE);
break;
case STATE_TRY_REVERT:
revert_callback ();
break;
case STATE_TRY_CANCEL:
cancel_callback ();
break;
default:
g_warning ("Failure in state %d!!!\n", state);
return;
}
/* Give up */
} else {
switch (state) {
case STATE_OK:
case STATE_CANCEL:
modal = TRUE; /* prevent an immediate exit */
/* Fall through */
case STATE_TRY:
case STATE_REVERT:
msg = g_strdup (_("Could not start fallback window manager.\n"
"Please run a window manager manually. You can\n"
"do this by selecting \"Run Program\" in the\n"
"foot menu\n"));
restart_finalize();
break;
case STATE_TRY_REVERT:
revert_callback ();
break;
case STATE_TRY_CANCEL:
cancel_callback ();
break;
default:
g_warning ("Failure in state %d!!!\n", state);
return;
}
}
if (msg) {
msgbox = gnome_message_box_new (msg,
GNOME_MESSAGE_BOX_ERROR,
_("OK"), NULL);
if (modal)
gnome_dialog_run (GNOME_DIALOG (msgbox));
else
gtk_widget_show (msgbox);
g_free (msg);
}
}
static void
show_restart_info (void)
{
gchar *save_session;
save_session = gnome_is_program_in_path ("save-session");
if (save_session != NULL) {
system (save_session);
}
g_free (save_session);
}
static void
restart_finish (void)
{
switch (state) {
case STATE_TRY:
case STATE_REVERT:
case STATE_OK:
case STATE_CANCEL:
hide_restart_dialog();
show_restart_info ();
restart_finalize();
break;
case STATE_TRY_REVERT:
revert_callback ();
break;
case STATE_TRY_CANCEL:
cancel_callback ();
break;
default:
g_warning ("Finished in state %d!!!\n", state);
return;
}
}
static void
restart_callback (WMResult result, gpointer data)
{
if (result == WM_SUCCESS)
restart_finish ();
else
restart_failure (result);
}
static void
restart (gboolean force)
{
WindowManager *current_wm = wm_list_get_current(), *mywm;
static gboolean last_try_was_twm = FALSE;
GnomeDesktopItem *twm_dentry = gnome_desktop_item_new ();
WindowManager twm_fallback = {twm_dentry, "twm", "twm", 0, 0, 1, 0};
gnome_desktop_item_set_entry_type (twm_dentry, GNOME_DESKTOP_ITEM_TYPE_APPLICATION);
gnome_desktop_item_set_string (twm_dentry,
GNOME_DESKTOP_ITEM_NAME, "twm");
gnome_desktop_item_set_string (twm_dentry,
GNOME_DESKTOP_ITEM_COMMENT, "twm");
gnome_desktop_item_set_string (twm_dentry,
GNOME_DESKTOP_ITEM_EXEC, "twm");
if(selected_wm) {
last_try_was_twm = FALSE;
mywm = selected_wm;
} else if(!last_try_was_twm) {
last_try_was_twm = TRUE;
mywm = (WindowManager*)&twm_fallback;
} else {
restart_finalize();
gnome_desktop_item_unref (twm_dentry);
return;
}
if (force || current_wm != mywm) {
show_restart_dialog (g_strdup (gnome_desktop_item_get_string (mywm->dentry, GNOME_DESKTOP_ITEM_NAME)));
if (state != STATE_OK && state != STATE_CANCEL)
gtk_widget_set_sensitive (capplet, FALSE);
restart_pending = TRUE;
wm_restart (mywm,
capplet->window,
restart_callback,
NULL);
} else {
restart_finalize ();
}
gnome_desktop_item_unref (twm_dentry);
}
static void
revert_callback (void)
{
StateType old_state = state;
switch (state) {
case STATE_IDLE:
case STATE_TRY_REVERT:
wm_list_revert();
selected_wm = wm_list_get_revert();
state = STATE_REVERT;
restart (old_state == STATE_TRY_REVERT);
/*update_gui();*/
break;
case STATE_TRY:
state = STATE_TRY_REVERT;
break;
default:
g_warning ("revert callback in state %d!!!\n", state);
return;
}
}
static void
cancel_callback (void)
{
StateType old_state = state;
switch (state) {
case STATE_IDLE:
case STATE_TRY_CANCEL:
wm_list_revert();
selected_wm = wm_list_get_revert();
state = STATE_CANCEL;
restart (old_state == STATE_TRY_CANCEL);
break;
case STATE_TRY:
state = STATE_TRY_CANCEL;
break;
case STATE_REVERT:
state = STATE_CANCEL;
break;
case STATE_TRY_REVERT:
state = STATE_TRY_CANCEL;
break;
default:
g_warning ("ok callback in state %d!!!\n", state);
return;
}
}
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