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