1 files changed, 424 insertions, 0 deletions
diff --git a/plugins/xsettings/xsettings-manager.c b/plugins/xsettings/xsettings-manager.c
new file mode 100644
index 0000000..6578ce1
--- /dev/null
+++ b/plugins/xsettings/xsettings-manager.c
@@ -0,0 +1,424 @@
+/*
+ * 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 <X11/Xmd.h> /* For CARD16 */
+
+#include "xsettings-manager.h"
+
+struct _XSettingsManager
+{
+ Display *display;
+ int screen;
+
+ Window window;
+ Atom manager_atom;
+ Atom selection_atom;
+ Atom xsettings_atom;
+
+ XSettingsTerminateFunc terminate;
+ void *cb_data;
+
+ XSettingsList *settings;
+ unsigned long serial;
+};
+
+static XSettingsList *settings;
+
+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 = malloc (sizeof *manager);
+ if (!manager)
+ return NULL;
+
+ 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 = NULL;
+ manager->serial = 0;
+
+ 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);
+ 
+ xsettings_list_free (manager->settings);
+ free (manager);
+}
+
+Window
+xsettings_manager_get_window (XSettingsManager *manager)
+{
+ return manager->window;
+}
+
+Bool
+xsettings_manager_process_event (XSettingsManager *manager,
+ XEvent *xev)
+{
+ if (xev->xany.window == manager->window &&
+ xev->xany.type == SelectionClear &&
+ xev->xselectionclear.selection == manager->selection_atom)
+ {
+ manager->terminate (manager->cb_data);
+ return True;
+ }
+
+ return False;
+}
+
+XSettingsResult
+xsettings_manager_delete_setting (XSettingsManager *manager,
+ const char *name)
+{
+ return xsettings_list_delete (&settings, name);
+}
+
+XSettingsResult
+xsettings_manager_set_setting (XSettingsManager *manager,
+ XSettingsSetting *setting)
+{
+ XSettingsSetting *old_setting = xsettings_list_lookup (settings, setting->name);
+ XSettingsSetting *new_setting;
+ XSettingsResult result;
+
+ if (old_setting)
+ {
+ if (xsettings_setting_equal (old_setting, setting))
+ return XSETTINGS_SUCCESS;
+
+ xsettings_list_delete (&settings, setting->name);
+ }
+
+ new_setting = xsettings_setting_copy (setting);
+ if (!new_setting)
+ return XSETTINGS_NO_MEM;
+ 
+ new_setting->last_change_serial = manager->serial;
+ 
+ result = xsettings_list_insert (&settings, new_setting);
+ 
+ if (result != XSETTINGS_SUCCESS)
+ xsettings_setting_free (new_setting);
+
+ return result;
+}
+
+XSettingsResult
+xsettings_manager_set_int (XSettingsManager *manager,
+ const char *name,
+ int value)
+{
+ XSettingsSetting setting;
+
+ setting.name = (char *)name;
+ setting.type = XSETTINGS_TYPE_INT;
+ setting.data.v_int = value;
+
+ return xsettings_manager_set_setting (manager, &setting);
+}
+
+XSettingsResult
+xsettings_manager_set_string (XSettingsManager *manager,
+ const char *name,
+ const char *value)
+{
+ XSettingsSetting setting;
+
+ setting.name = (char *)name;
+ setting.type = XSETTINGS_TYPE_STRING;
+ setting.data.v_string = (char *)value;
+
+ return xsettings_manager_set_setting (manager, &setting);
+}
+
+XSettingsResult
+xsettings_manager_set_color (XSettingsManager *manager,
+ const char *name,
+ XSettingsColor *value)
+{
+ XSettingsSetting setting;
+
+ setting.name = (char *)name;
+ setting.type = XSETTINGS_TYPE_COLOR;
+ setting.data.v_color = *value;
+
+ return xsettings_manager_set_setting (manager, &setting);
+}
+
+static size_t
+setting_length (XSettingsSetting *setting)
+{
+ size_t length = 8; /* type + pad + name-len + last-change-serial */
+ length += XSETTINGS_PAD (strlen (setting->name), 4);
+
+ switch (setting->type)
+ {
+ case XSETTINGS_TYPE_INT:
+ length += 4;
+ break;
+ case XSETTINGS_TYPE_STRING:
+ length += 4 + XSETTINGS_PAD (strlen (setting->data.v_string), 4);
+ break;
+ case XSETTINGS_TYPE_COLOR:
+ length += 8;
+ break;
+ }
+
+ return length;
+}
+
+static void
+setting_store (XSettingsSetting *setting,
+ XSettingsBuffer *buffer)
+{
+ size_t string_len;
+ size_t length;
+
+ *(buffer->pos++) = setting->type;
+ *(buffer->pos++) = 0;
+
+ string_len = strlen (setting->name);
+ *(CARD16 *)(buffer->pos) = string_len;
+ buffer->pos += 2;
+
+ length = XSETTINGS_PAD (string_len, 4);
+ memcpy (buffer->pos, setting->name, string_len);
+ length -= string_len;
+ buffer->pos += string_len;
+ 
+ while (length > 0)
+ {
+ *(buffer->pos++) = 0;
+ length--;
+ }
+
+ *(CARD32 *)(buffer->pos) = setting->last_change_serial;
+ buffer->pos += 4;
+
+ switch (setting->type)
+ {
+ case XSETTINGS_TYPE_INT:
+ *(CARD32 *)(buffer->pos) = setting->data.v_int;
+ buffer->pos += 4;
+ break;
+ case XSETTINGS_TYPE_STRING:
+ string_len = strlen (setting->data.v_string);
+ *(CARD32 *)(buffer->pos) = string_len;
+ buffer->pos += 4;
+ 
+ length = XSETTINGS_PAD (string_len, 4);
+ memcpy (buffer->pos, setting->data.v_string, string_len);
+ length -= string_len;
+ buffer->pos += string_len;
+ 
+ while (length > 0)
+ {
+ *(buffer->pos++) = 0;
+ length--;
+ }
+ break;
+ case XSETTINGS_TYPE_COLOR:
+ *(CARD16 *)(buffer->pos) = setting->data.v_color.red;
+ *(CARD16 *)(buffer->pos + 2) = setting->data.v_color.green;
+ *(CARD16 *)(buffer->pos + 4) = setting->data.v_color.blue;
+ *(CARD16 *)(buffer->pos + 6) = setting->data.v_color.alpha;
+ buffer->pos += 8;
+ break;
+ }
+}
+
+XSettingsResult
+xsettings_manager_notify (XSettingsManager *manager)
+{
+ XSettingsBuffer buffer;
+ XSettingsList *iter;
+ int n_settings = 0;
+
+ buffer.len = 12; /* byte-order + pad + SERIAL + N_SETTINGS */
+
+ iter = settings;
+ while (iter)
+ {
+ buffer.len += setting_length (iter->setting);
+ n_settings++;
+ iter = iter->next;
+ }
+
+ buffer.data = buffer.pos = malloc (buffer.len);
+ if (!buffer.data)
+ return XSETTINGS_NO_MEM;
+
+ *buffer.pos = xsettings_byte_order ();
+
+ buffer.pos += 4;
+ *(CARD32 *)buffer.pos = manager->serial++;
+ buffer.pos += 4;
+ *(CARD32 *)buffer.pos = n_settings;
+ buffer.pos += 4;
+
+ iter = settings;
+ while (iter)
+ {
+ setting_store (iter->setting, &buffer);
+ iter = iter->next;
+ }
+
+ XChangeProperty (manager->display, manager->window,
+ manager->xsettings_atom, manager->xsettings_atom,
+ 8, PropModeReplace, buffer.data, buffer.len);
+
+ free (buffer.data);
+
+ return XSETTINGS_SUCCESS;
+}
+