moving from https://github.com/perberos/mate-desktop-environment

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;
+}
+