diff options
Diffstat (limited to '')
| -rw-r--r-- | plugins/xsettings/xsettings-manager.c | 393 |
1 files changed, 393 insertions, 0 deletions
diff --git a/plugins/xsettings/xsettings-manager.c b/plugins/xsettings/xsettings-manager.c new file mode 100644 index 0000000..947cc9e --- /dev/null +++ b/plugins/xsettings/xsettings-manager.c @@ -0,0 +1,393 @@ +/* + * Copyright © 2001 Red Hat, Inc. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of Red Hat not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. Red Hat makes no representations about the + * suitability of this software for any purpose. It is provided "as is" + * without express or implied warranty. + * + * RED HAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL RED HAT + * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Author: Owen Taylor, Red Hat, Inc. + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <glib.h> +#include <X11/Xmd.h> /* For CARD16 */ + +#include "xsettings-manager.h" + +#define XSETTINGS_VARIANT_TYPE_COLOR (G_VARIANT_TYPE ("(qqqq)")) + +struct _XSettingsManager +{ + Display *display; + int screen; + + Window window; + Atom manager_atom; + Atom selection_atom; + Atom xsettings_atom; + + XSettingsTerminateFunc terminate; + void *cb_data; + + GHashTable *settings; + unsigned long serial; + + GVariant *overrides; +}; + +typedef struct +{ + Window window; + Atom timestamp_prop_atom; +} TimeStampInfo; + +static Bool +timestamp_predicate (Display *display, + XEvent *xevent, + XPointer arg) +{ + TimeStampInfo *info = (TimeStampInfo *)arg; + + if (xevent->type == PropertyNotify && + xevent->xproperty.window == info->window && + xevent->xproperty.atom == info->timestamp_prop_atom) + return True; + + return False; +} + +/** + * get_server_time: + * @display: display from which to get the time + * @window: a #Window, used for communication with the server. + * The window must have PropertyChangeMask in its + * events mask or a hang will result. + * + * Routine to get the current X server time stamp. + * + * Return value: the time stamp. + **/ +static Time +get_server_time (Display *display, + Window window) +{ + unsigned char c = 'a'; + XEvent xevent; + TimeStampInfo info; + + info.timestamp_prop_atom = XInternAtom (display, "_TIMESTAMP_PROP", False); + info.window = window; + + XChangeProperty (display, window, + info.timestamp_prop_atom, info.timestamp_prop_atom, + 8, PropModeReplace, &c, 1); + + XIfEvent (display, &xevent, + timestamp_predicate, (XPointer)&info); + + return xevent.xproperty.time; +} + +Bool +xsettings_manager_check_running (Display *display, + int screen) +{ + char buffer[256]; + Atom selection_atom; + + sprintf(buffer, "_XSETTINGS_S%d", screen); + selection_atom = XInternAtom (display, buffer, False); + + if (XGetSelectionOwner (display, selection_atom)) + return True; + else + return False; +} + +XSettingsManager * +xsettings_manager_new (Display *display, + int screen, + XSettingsTerminateFunc terminate, + void *cb_data) +{ + XSettingsManager *manager; + Time timestamp; + XClientMessageEvent xev; + + char buffer[256]; + + manager = g_slice_new (XSettingsManager); + + manager->display = display; + manager->screen = screen; + + sprintf(buffer, "_XSETTINGS_S%d", screen); + manager->selection_atom = XInternAtom (display, buffer, False); + manager->xsettings_atom = XInternAtom (display, "_XSETTINGS_SETTINGS", False); + manager->manager_atom = XInternAtom (display, "MANAGER", False); + + manager->terminate = terminate; + manager->cb_data = cb_data; + + manager->settings = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, (GDestroyNotify) xsettings_setting_free); + manager->serial = 0; + manager->overrides = NULL; + + manager->window = XCreateSimpleWindow (display, + RootWindow (display, screen), + 0, 0, 10, 10, 0, + WhitePixel (display, screen), + WhitePixel (display, screen)); + + XSelectInput (display, manager->window, PropertyChangeMask); + timestamp = get_server_time (display, manager->window); + + XSetSelectionOwner (display, manager->selection_atom, + manager->window, timestamp); + + /* Check to see if we managed to claim the selection. If not, + * we treat it as if we got it then immediately lost it + */ + + if (XGetSelectionOwner (display, manager->selection_atom) == + manager->window) + { + xev.type = ClientMessage; + xev.window = RootWindow (display, screen); + xev.message_type = manager->manager_atom; + xev.format = 32; + xev.data.l[0] = timestamp; + xev.data.l[1] = manager->selection_atom; + xev.data.l[2] = manager->window; + xev.data.l[3] = 0; /* manager specific data */ + xev.data.l[4] = 0; /* manager specific data */ + + XSendEvent (display, RootWindow (display, screen), + False, StructureNotifyMask, (XEvent *)&xev); + } + else + { + manager->terminate (manager->cb_data); + } + + return manager; +} + +void +xsettings_manager_destroy (XSettingsManager *manager) +{ + XDestroyWindow (manager->display, manager->window); + + g_hash_table_unref (manager->settings); + + g_slice_free (XSettingsManager, manager); +} + +static void +xsettings_manager_set_setting (XSettingsManager *manager, + const gchar *name, + gint tier, + GVariant *value) +{ + XSettingsSetting *setting; + + setting = g_hash_table_lookup (manager->settings, name); + + if (setting == NULL) + { + setting = xsettings_setting_new (name); + setting->last_change_serial = manager->serial; + g_hash_table_insert (manager->settings, setting->name, setting); + } + + xsettings_setting_set (setting, tier, value, manager->serial); + + if (xsettings_setting_get (setting) == NULL) + g_hash_table_remove (manager->settings, name); +} + +void +xsettings_manager_set_int (XSettingsManager *manager, + const char *name, + int value) +{ + xsettings_manager_set_setting (manager, name, 0, g_variant_new_int32 (value)); +} + +void +xsettings_manager_set_string (XSettingsManager *manager, + const char *name, + const char *value) +{ + xsettings_manager_set_setting (manager, name, 0, g_variant_new_string (value)); +} + +void +xsettings_manager_set_color (XSettingsManager *manager, + const char *name, + XSettingsColor *value) +{ + GVariant *tmp; + + tmp = g_variant_new ("(qqqq)", value->red, value->green, value->blue, value->alpha); + g_assert (g_variant_is_of_type (tmp, XSETTINGS_VARIANT_TYPE_COLOR)); /* paranoia... */ + xsettings_manager_set_setting (manager, name, 0, tmp); +} + +void +xsettings_manager_delete_setting (XSettingsManager *manager, + const char *name) +{ + xsettings_manager_set_setting (manager, name, 0, NULL); +} + +static gchar +xsettings_get_typecode (GVariant *value) +{ + switch (g_variant_classify (value)) + { + case G_VARIANT_CLASS_INT32: + return XSETTINGS_TYPE_INT; + case G_VARIANT_CLASS_STRING: + return XSETTINGS_TYPE_STRING; + case G_VARIANT_CLASS_TUPLE: + return XSETTINGS_TYPE_COLOR; + default: + g_assert_not_reached (); + } +} + +static void +align_string (GString *string, + gint alignment) +{ + /* Adds nul-bytes to the string until its length is an even multiple + * of the specified alignment requirement. + */ + while ((string->len % alignment) != 0) + g_string_append_c (string, '\0'); +} + +static void +setting_store (XSettingsSetting *setting, + GString *buffer) +{ + XSettingsType type; + GVariant *value; + guint16 len16; + + value = xsettings_setting_get (setting); + + type = xsettings_get_typecode (value); + + g_string_append_c (buffer, type); + g_string_append_c (buffer, 0); + + len16 = strlen (setting->name); + g_string_append_len (buffer, (gchar *) &len16, 2); + g_string_append (buffer, setting->name); + align_string (buffer, 4); + + g_string_append_len (buffer, (gchar *) &setting->last_change_serial, 4); + + if (type == XSETTINGS_TYPE_STRING) + { + const gchar *string; + gsize stringlen; + guint32 len32; + + string = g_variant_get_string (value, &stringlen); + len32 = stringlen; + g_string_append_len (buffer, (gchar *) &len32, 4); + g_string_append (buffer, string); + align_string (buffer, 4); + } + else + /* GVariant format is the same as XSETTINGS format for the non-string types */ + g_string_append_len (buffer, g_variant_get_data (value), g_variant_get_size (value)); +} + +void +xsettings_manager_notify (XSettingsManager *manager) +{ + GString *buffer; + GHashTableIter iter; + int n_settings; + gpointer value; + + n_settings = g_hash_table_size (manager->settings); + + buffer = g_string_new (NULL); + g_string_append_c (buffer, xsettings_byte_order ()); + g_string_append_c (buffer, '\0'); + g_string_append_c (buffer, '\0'); + g_string_append_c (buffer, '\0'); + + g_string_append_len (buffer, (gchar *) &manager->serial, 4); + g_string_append_len (buffer, (gchar *) &n_settings, 4); + + g_hash_table_iter_init (&iter, manager->settings); + while (g_hash_table_iter_next (&iter, NULL, &value)) + setting_store (value, buffer); + + XChangeProperty (manager->display, manager->window, + manager->xsettings_atom, manager->xsettings_atom, + 8, PropModeReplace, (guchar *) buffer->str, buffer->len); + + g_string_free (buffer, TRUE); + manager->serial++; +} + +void +xsettings_manager_set_overrides (XSettingsManager *manager, + GVariant *overrides) +{ + GVariantIter iter; + const gchar *key; + GVariant *value; + + g_return_if_fail (overrides != NULL && g_variant_is_of_type (overrides, G_VARIANT_TYPE_VARDICT)); + + if (manager->overrides) + { + /* unset the existing overrides */ + + g_variant_iter_init (&iter, manager->overrides); + while (g_variant_iter_next (&iter, "{&sv}", &key, NULL)) + /* only unset it at this point if it's not in the new list */ + if (!g_variant_lookup (overrides, key, "*", NULL)) + xsettings_manager_set_setting (manager, key, 1, NULL); + g_variant_unref (manager->overrides); + } + + /* save this so we can do the unsets next time */ + manager->overrides = g_variant_ref_sink (overrides); + + /* set the new values */ + g_variant_iter_init (&iter, overrides); + while (g_variant_iter_loop (&iter, "{&sv}", &key, &value)) + { + /* only accept recognised types... */ + if (!g_variant_is_of_type (value, G_VARIANT_TYPE_STRING) && + !g_variant_is_of_type (value, G_VARIANT_TYPE_INT32) && + !g_variant_is_of_type (value, XSETTINGS_VARIANT_TYPE_COLOR)) + continue; + + xsettings_manager_set_setting (manager, key, 1, value); + } +} |