2 * Copyright © 2001, 2007 Red Hat, Inc.
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation, and that the name of Red Hat not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. Red Hat makes no representations about the
11 * suitability of this software for any purpose. It is provided "as is"
12 * without express or implied warranty.
14 * RED HAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL RED HAT
16 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
18 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
19 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 * Author: Owen Taylor, Red Hat, Inc.
26 #include "xsettings-client.h"
28 #include <gdk/x11/gdkx11display.h>
29 #include <gdk/x11/gdkx11property.h>
30 #include <gdk/x11/gdkx11screen.h>
31 #include <gdk/x11/gdkx11window.h>
32 #include <gdk/x11/gdkprivate-x11.h>
33 #include <gdk/x11/gdkscreen-x11.h>
35 #include <gdkinternals.h>
40 #include <X11/Xmd.h> /* For CARD16 */
42 #include "gdksettings.c"
44 /* Types of settings possible. Enum values correspond to
49 XSETTINGS_TYPE_INT = 0,
50 XSETTINGS_TYPE_STRING = 1,
51 XSETTINGS_TYPE_COLOR = 2
54 typedef struct _XSettingsBuffer XSettingsBuffer;
56 struct _XSettingsBuffer
64 struct _XSettingsClient
68 GdkWindow *manager_window;
70 GHashTable *settings; /* string of GDK settings name => XSettingsSetting */
74 gdk_xsettings_notify (const char *name,
75 GdkSettingAction action,
80 new_event.type = GDK_SETTING;
81 new_event.setting.window = gdk_screen_get_root_window (screen);
82 new_event.setting.send_event = FALSE;
83 new_event.setting.action = action;
84 new_event.setting.name = (char*) name;
86 gdk_event_put (&new_event);
90 value_equal (const GValue *value_a,
91 const GValue *value_b)
93 if (G_VALUE_TYPE (value_a) != G_VALUE_TYPE (value_b))
96 switch (G_VALUE_TYPE (value_a))
99 return g_value_get_int (value_a) == g_value_get_int (value_b);
100 case XSETTINGS_TYPE_COLOR:
101 return gdk_rgba_equal (g_value_get_boxed (value_a), g_value_get_boxed (value_b));
103 return g_str_equal (g_value_get_string (value_a), g_value_get_string (value_b));
105 g_warning ("unable to compare values of type %s", g_type_name (G_VALUE_TYPE (value_a)));
111 notify_changes (XSettingsClient *client,
112 GHashTable *old_list)
115 GValue *setting, *old_setting;
118 if (client->settings != NULL)
120 g_hash_table_iter_init (&iter, client->settings);
121 while (g_hash_table_iter_next (&iter, (gpointer *) &name, (gpointer*) &setting))
123 old_setting = old_list ? g_hash_table_lookup (old_list, name) : NULL;
125 if (old_setting == NULL)
126 gdk_xsettings_notify (name, GDK_SETTING_ACTION_NEW, client->screen);
127 else if (!value_equal (setting, old_setting))
128 gdk_xsettings_notify (name, GDK_SETTING_ACTION_CHANGED, client->screen);
130 /* remove setting from old_list */
131 if (old_setting != NULL)
132 g_hash_table_remove (old_list, name);
136 if (old_list != NULL)
138 /* old_list now contains only deleted settings */
139 g_hash_table_iter_init (&iter, old_list);
140 while (g_hash_table_iter_next (&iter, (gpointer *) &name, (gpointer*) &old_setting))
141 gdk_xsettings_notify (name, GDK_SETTING_ACTION_DELETED, client->screen);
145 #define BYTES_LEFT(buffer) ((buffer)->data + (buffer)->len - (buffer)->pos)
147 #define return_if_fail_bytes(buffer, n_bytes) G_STMT_START{ \
148 if (BYTES_LEFT (buffer) < (n_bytes)) \
150 g_warning ("Invalid XSETTINGS property (read off end: Expected %u bytes, only %ld left", \
151 (n_bytes), BYTES_LEFT (buffer)); \
157 fetch_card16 (XSettingsBuffer *buffer,
162 return_if_fail_bytes (buffer, 2);
164 x = *(CARD16 *)buffer->pos;
167 if (buffer->byte_order == MSBFirst)
168 *result = GUINT16_FROM_BE (x);
170 *result = GUINT16_FROM_LE (x);
176 fetch_ushort (XSettingsBuffer *buffer,
177 unsigned short *result)
182 r = fetch_card16 (buffer, &x);
190 fetch_card32 (XSettingsBuffer *buffer,
195 return_if_fail_bytes (buffer, 4);
197 x = *(CARD32 *)buffer->pos;
200 if (buffer->byte_order == MSBFirst)
201 *result = GUINT32_FROM_BE (x);
203 *result = GUINT32_FROM_LE (x);
209 fetch_card8 (XSettingsBuffer *buffer,
212 return_if_fail_bytes (buffer, 1);
214 *result = *(CARD8 *)buffer->pos;
220 #define XSETTINGS_PAD(n,m) ((n + m - 1) & (~(m-1)))
223 fetch_string (XSettingsBuffer *buffer,
229 pad_len = XSETTINGS_PAD (length, 4);
230 if (pad_len < length) /* guard against overflow */
232 g_warning ("Invalid XSETTINGS property (overflow in string length)");
236 return_if_fail_bytes (buffer, pad_len);
238 *result = g_strndup ((char *) buffer->pos, length);
239 buffer->pos += pad_len;
245 free_value (gpointer data)
247 GValue *value = data;
249 g_value_unset (value);
254 parse_settings (unsigned char *data,
257 XSettingsBuffer buffer;
258 GHashTable *settings = NULL;
262 GValue *value = NULL;
264 const char *gdk_name;
266 buffer.pos = buffer.data = data;
269 if (!fetch_card8 (&buffer, (unsigned char *)&buffer.byte_order))
272 if (buffer.byte_order != MSBFirst &&
273 buffer.byte_order != LSBFirst)
275 g_warning ("Invalid XSETTINGS property (unknown byte order %u)", buffer.byte_order);
281 if (!fetch_card32 (&buffer, &serial) ||
282 !fetch_card32 (&buffer, &n_entries))
285 GDK_NOTE(SETTINGS, g_print("reading %u settings (serial %u byte order %u)\n", n_entries, serial, buffer.byte_order));
287 for (i = 0; i < n_entries; i++)
293 if (!fetch_card8 (&buffer, &type))
298 if (!fetch_card16 (&buffer, &name_len))
301 if (!fetch_string (&buffer, name_len, &x_name) ||
302 /* last change serial (we ignore it) */
303 !fetch_card32 (&buffer, &v_int))
308 case XSETTINGS_TYPE_INT:
309 if (!fetch_card32 (&buffer, &v_int))
312 value = g_new0 (GValue, 1);
313 g_value_init (value, G_TYPE_INT);
314 g_value_set_int (value, (gint32) v_int);
316 GDK_NOTE(SETTINGS, g_print(" %s = %d\n", x_name, (gint32) v_int));
318 case XSETTINGS_TYPE_STRING:
322 if (!fetch_card32 (&buffer, &v_int) ||
323 !fetch_string (&buffer, v_int, &s))
326 value = g_new0 (GValue, 1);
327 g_value_init (value, G_TYPE_STRING);
328 g_value_take_string (value, s);
330 GDK_NOTE(SETTINGS, g_print(" %s = \"%s\"\n", x_name, s));
333 case XSETTINGS_TYPE_COLOR:
335 unsigned short red, green, blue, alpha;
338 if (!fetch_ushort (&buffer, &red) ||
339 !fetch_ushort (&buffer, &green) ||
340 !fetch_ushort (&buffer, &blue) ||
341 !fetch_ushort (&buffer, &alpha))
344 rgba.red = red / 65535.0;
345 rgba.green = green / 65535.0;
346 rgba.blue = blue / 65535.0;
347 rgba.alpha = alpha / 65535.0;
349 value = g_new0 (GValue, 1);
350 g_value_init (value, G_TYPE_STRING);
351 g_value_set_boxed (value, &rgba);
353 GDK_NOTE(SETTINGS, g_print(" %s = #%02X%02X%02X%02X\n", x_name, alpha,red, green, blue));
357 /* Quietly ignore unknown types */
358 GDK_NOTE(SETTINGS, g_print(" %s = ignored (unknown type %u)\n", x_name, type));
362 gdk_name = gdk_from_xsettings_name (x_name);
366 if (gdk_name == NULL)
368 GDK_NOTE(SETTINGS, g_print(" ==> unknown to GTK\n"));
372 GDK_NOTE(SETTINGS, g_print(" ==> storing as '%s'\n", gdk_name));
374 if (settings == NULL)
375 settings = g_hash_table_new_full (g_str_hash, g_str_equal,
379 if (g_hash_table_lookup (settings, gdk_name) != NULL)
381 g_warning ("Invalid XSETTINGS property (Duplicate entry for '%s')", gdk_name);
385 g_hash_table_insert (settings, (gpointer) gdk_name, value);
399 g_hash_table_unref (settings);
407 read_settings (XSettingsClient *client,
412 unsigned long n_items;
413 unsigned long bytes_after;
417 GHashTable *old_list = client->settings;
419 client->settings = NULL;
421 if (client->manager_window)
423 GdkDisplay *display = gdk_screen_get_display (client->screen);
424 Atom xsettings_atom = gdk_x11_get_xatom_by_name_for_display (display, "_XSETTINGS_SETTINGS");
426 gdk_x11_display_error_trap_push (display);
427 result = XGetWindowProperty (gdk_x11_display_get_xdisplay (display),
428 gdk_x11_window_get_xid (client->manager_window),
429 xsettings_atom, 0, LONG_MAX,
430 False, xsettings_atom,
431 &type, &format, &n_items, &bytes_after, &data);
432 gdk_x11_display_error_trap_pop_ignored (display);
434 if (result == Success && type != None)
436 if (type != xsettings_atom)
438 g_warning ("Invalid type for XSETTINGS property: %s", gdk_x11_get_xatom_name_for_display (display, type));
440 else if (format != 8)
442 g_warning ("Invalid format for XSETTINGS property: %d", format);
445 client->settings = parse_settings (data, n_items);
452 notify_changes (client, old_list);
454 g_hash_table_unref (old_list);
458 get_selection_atom (GdkScreen *screen)
460 return _gdk_x11_get_xatom_for_display_printf (gdk_screen_get_display (screen), "_XSETTINGS_S%d", gdk_x11_screen_get_screen_number (screen));
463 static GdkFilterReturn
464 gdk_xsettings_manager_window_filter (GdkXEvent *xevent,
469 check_manager_window (XSettingsClient *client,
470 gboolean notify_changes)
474 Window manager_window_xid;
476 display = gdk_screen_get_display (client->screen);
477 xdisplay = gdk_x11_display_get_xdisplay (display);
479 if (client->manager_window)
481 gdk_window_remove_filter (client->manager_window, gdk_xsettings_manager_window_filter, client->screen);
482 g_object_unref (client->manager_window);
485 gdk_x11_display_grab (display);
487 manager_window_xid = XGetSelectionOwner (xdisplay, get_selection_atom (client->screen));
488 client->manager_window = gdk_x11_window_foreign_new_for_display (display,
490 /* XXX: Can't use gdk_window_set_events() here because the first call to this
491 * function happens too early in gdk_init() */
492 if (client->manager_window)
493 XSelectInput (xdisplay,
494 gdk_x11_window_get_xid (client->manager_window),
495 PropertyChangeMask | StructureNotifyMask);
497 gdk_x11_display_ungrab (display);
499 gdk_display_flush (display);
501 if (client->manager_window)
503 gdk_window_add_filter (client->manager_window, gdk_xsettings_manager_window_filter, client->screen);
506 read_settings (client, notify_changes);
509 static GdkFilterReturn
510 gdk_xsettings_root_window_filter (GdkXEvent *xevent,
514 GdkScreen *screen = data;
515 XSettingsClient *client = GDK_X11_SCREEN (screen)->xsettings_client;
516 GdkDisplay *display = gdk_screen_get_display (screen);
517 XEvent *xev = xevent;
519 /* The checks here will not unlikely cause us to reread
520 * the properties from the manager window a number of
521 * times when the manager changes from A->B. But manager changes
522 * are going to be pretty rare.
524 if (xev->xany.type == ClientMessage &&
525 xev->xclient.message_type == gdk_x11_get_xatom_by_name_for_display (display, "MANAGER") &&
526 xev->xclient.data.l[1] == get_selection_atom (client->screen))
528 check_manager_window (client, TRUE);
529 return GDK_FILTER_REMOVE;
532 return GDK_FILTER_CONTINUE;
535 static GdkFilterReturn
536 gdk_xsettings_manager_window_filter (GdkXEvent *xevent,
540 GdkScreen *screen = data;
541 XSettingsClient *client = GDK_X11_SCREEN (screen)->xsettings_client;
542 XEvent *xev = xevent;
544 if (xev->xany.type == DestroyNotify)
546 check_manager_window (client, TRUE);
547 /* let GDK do its cleanup */
548 return GDK_FILTER_CONTINUE;
550 else if (xev->xany.type == PropertyNotify)
552 read_settings (client, TRUE);
553 return GDK_FILTER_REMOVE;
556 return GDK_FILTER_CONTINUE;;
560 _gdk_x11_xsettings_client_new (GdkScreen *screen)
562 XSettingsClient *client;
564 client = g_new (XSettingsClient, 1);
568 client->screen = screen;
569 client->manager_window = None;
570 client->settings = NULL;
572 gdk_window_add_filter (gdk_screen_get_root_window (screen), gdk_xsettings_root_window_filter, screen);
574 check_manager_window (client, FALSE);
580 _gdk_x11_xsettings_client_destroy (XSettingsClient *client)
582 gdk_window_remove_filter (gdk_screen_get_root_window (client->screen), gdk_xsettings_root_window_filter, client->screen);
583 if (client->manager_window)
585 gdk_window_remove_filter (client->manager_window, gdk_xsettings_manager_window_filter, client->screen);
586 g_object_unref (client->manager_window);
589 if (client->settings)
590 g_hash_table_unref (client->settings);
595 _gdk_x11_xsettings_client_get_setting (XSettingsClient *client,
598 return g_hash_table_lookup (client->settings, name);