Dogcows Code - chaz/tint2/blob - src/launcher/xsettings-client.c

   1 /*
   2  * Copyright © 2001 Red Hat, Inc.
   3  *
   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.
  13  *
  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.
  20  *
  21  * Author:  Owen Taylor, Red Hat, Inc.
  22  */
  23 #include <limits.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include <X11/Xlib.h>
  29 #include <X11/Xmd.h>            /* For CARD16 */
  30
  31 #include "xsettings-client.h"
  32 #include "server.h"
  33 #include "panel.h"
  34 #include "launcher.h"
  35
  36 struct _XSettingsClient
  37 {
  38         Display *display;
  39         int screen;
  40         XSettingsNotifyFunc notify;
  41         XSettingsWatchFunc watch;
  42         void *cb_data;
  43
  44         Window manager_window;
  45         XSettingsList *settings;
  46 };
  47
  48
  49 void xsettings_notify_cb (const char *name, XSettingsAction action, XSettingsSetting *setting, void *data)
  50 {
  51         //printf("xsettings_notify_cb\n");
  52         if ((action == XSETTINGS_ACTION_NEW || action == XSETTINGS_ACTION_CHANGED) && name != NULL && setting != NULL) {
  53                 if (!strcmp(name, "Net/IconThemeName") && setting->type == XSETTINGS_TYPE_STRING) {
  54                         printf("XSETTINGS_ACTION %s\n", setting->data.v_string);
  55                         if (icon_theme_name) {
  56                                 if (strcmp(icon_theme_name, setting->data.v_string) == 0)
  57                                         return;
  58                                 g_free(icon_theme_name);
  59                         }
  60                         icon_theme_name = strdup(setting->data.v_string);
  61                         /*
  62                         cleanup_launcher();
  63                         int i;
  64                         Panel *p;
  65                         for (i=0 ; i < nb_panel ; i++) {
  66                                 p = &panel1[i];
  67                                 init_launcher_panel(p);
  68                         }
  69                         /*
  70                         MBTrayApp *mb = (MBTrayApp *)data;
  71                         mb->theme_name = strdup(setting->data.v_string);
  72                         if (mb->theme_cb)
  73                                 mb->theme_cb(mb, mb->theme_name);
  74                         */
  75                 }
  76         }
  77 }
  78
  79
  80 static void notify_changes (XSettingsClient *client, XSettingsList *old_list)
  81 {
  82         XSettingsList *old_iter = old_list;
  83         XSettingsList *new_iter = client->settings;
  84
  85         if (!client->notify)
  86                 return;
  87
  88         while (old_iter || new_iter) {
  89                 int cmp;
  90
  91                 if (old_iter && new_iter)
  92                         cmp = strcmp (old_iter->setting->name, new_iter->setting->name);
  93                 else if (old_iter)
  94                         cmp = -1;
  95                 else
  96                         cmp = 1;
  97
  98                 if (cmp < 0) {
  99                         client->notify (old_iter->setting->name, XSETTINGS_ACTION_DELETED, NULL, client->cb_data);
 100                 }
 101                 else if (cmp == 0) {
 102                         if (!xsettings_setting_equal (old_iter->setting, new_iter->setting))
 103                                 client->notify (old_iter->setting->name, XSETTINGS_ACTION_CHANGED, new_iter->setting, client->cb_data);
 104                 }
 105                 else {
 106                         client->notify (new_iter->setting->name, XSETTINGS_ACTION_NEW, new_iter->setting, client->cb_data);
 107                 }
 108
 109                 if (old_iter)
 110                         old_iter = old_iter->next;
 111                 if (new_iter)
 112                         new_iter = new_iter->next;
 113         }
 114 }
 115
 116
 117 static int ignore_errors (Display *display, XErrorEvent *event)
 118 {
 119         return True;
 120 }
 121
 122 static char local_byte_order = '\0';
 123
 124 #define BYTES_LEFT(buffer) ((buffer)->data + (buffer)->len - (buffer)->pos)
 125
 126 static XSettingsResult fetch_card16 (XSettingsBuffer *buffer, CARD16 *result)
 127 {
 128         CARD16 x;
 129
 130         if (BYTES_LEFT (buffer) < 2)
 131                 return XSETTINGS_ACCESS;
 132
 133         x = *(CARD16 *)buffer->pos;
 134         buffer->pos += 2;
 135
 136         if (buffer->byte_order == local_byte_order)
 137                 *result = x;
 138         else
 139                 *result = (x << 8) | (x >> 8);
 140
 141         return XSETTINGS_SUCCESS;
 142 }
 143
 144
 145 static XSettingsResult fetch_ushort (XSettingsBuffer *buffer, unsigned short  *result)
 146 {
 147         CARD16 x;
 148         XSettingsResult r;
 149
 150         r = fetch_card16 (buffer, &x);
 151         if (r == XSETTINGS_SUCCESS)
 152                 *result = x;
 153
 154         return r;
 155 }
 156
 157
 158 static XSettingsResult fetch_card32 (XSettingsBuffer *buffer, CARD32 *result)
 159 {
 160         CARD32 x;
 161
 162         if (BYTES_LEFT (buffer) < 4)
 163                 return XSETTINGS_ACCESS;
 164
 165         x = *(CARD32 *)buffer->pos;
 166         buffer->pos += 4;
 167
 168         if (buffer->byte_order == local_byte_order)
 169                 *result = x;
 170         else
 171                 *result = (x << 24) | ((x & 0xff00) << 8) | ((x & 0xff0000) >> 8) | (x >> 24);
 172
 173         return XSETTINGS_SUCCESS;
 174 }
 175
 176 static XSettingsResult fetch_card8 (XSettingsBuffer *buffer, CARD8 *result)
 177 {
 178   if (BYTES_LEFT (buffer) < 1)
 179     return XSETTINGS_ACCESS;
 180
 181   *result = *(CARD8 *)buffer->pos;
 182   buffer->pos += 1;
 183
 184   return XSETTINGS_SUCCESS;
 185 }
 186
 187 #define XSETTINGS_PAD(n,m) ((n + m - 1) & (~(m-1)))
 188
 189 static XSettingsList *parse_settings (unsigned char *data, size_t len)
 190 {
 191         XSettingsBuffer buffer;
 192         XSettingsResult result = XSETTINGS_SUCCESS;
 193         XSettingsList *settings = NULL;
 194         CARD32 serial;
 195         CARD32 n_entries;
 196         CARD32 i;
 197         XSettingsSetting *setting = NULL;
 198
 199         local_byte_order = xsettings_byte_order ();
 200
 201         buffer.pos = buffer.data = data;
 202         buffer.len = len;
 203
 204         result = fetch_card8 (&buffer, (CARD8*)&buffer.byte_order);
 205         if (buffer.byte_order != MSBFirst && buffer.byte_order != LSBFirst) {
 206                 fprintf (stderr, "Invalid byte order %x in XSETTINGS property\n", buffer.byte_order);
 207                 result = XSETTINGS_FAILED;
 208                 goto out;
 209         }
 210
 211         buffer.pos += 3;
 212
 213         result = fetch_card32 (&buffer, &serial);
 214         if (result != XSETTINGS_SUCCESS)
 215                 goto out;
 216
 217         result = fetch_card32 (&buffer, &n_entries);
 218         if (result != XSETTINGS_SUCCESS)
 219                 goto out;
 220
 221         for (i = 0; i < n_entries; i++) {
 222                 CARD8 type;
 223                 CARD16 name_len;
 224                 CARD32 v_int;
 225                 size_t pad_len;
 226
 227                 result = fetch_card8 (&buffer, &type);
 228                 if (result != XSETTINGS_SUCCESS)
 229                         goto out;
 230
 231                 buffer.pos += 1;
 232
 233                 result = fetch_card16 (&buffer, &name_len);
 234                 if (result != XSETTINGS_SUCCESS)
 235                         goto out;
 236
 237                 pad_len = XSETTINGS_PAD(name_len, 4);
 238                 if (BYTES_LEFT (&buffer) < pad_len) {
 239                         result = XSETTINGS_ACCESS;
 240                         goto out;
 241                 }
 242
 243                 setting = malloc (sizeof *setting);
 244                 if (!setting) {
 245                         result = XSETTINGS_NO_MEM;
 246                         goto out;
 247                 }
 248                 setting->type = XSETTINGS_TYPE_INT; /* No allocated memory */
 249
 250                 setting->name = malloc (name_len + 1);
 251                 if (!setting->name) {
 252                         result = XSETTINGS_NO_MEM;
 253                         goto out;
 254                 }
 255
 256                 memcpy (setting->name, buffer.pos, name_len);
 257                 setting->name[name_len] = '\0';
 258                 buffer.pos += pad_len;
 259
 260                 result = fetch_card32 (&buffer, &v_int);
 261                 if (result != XSETTINGS_SUCCESS)
 262                         goto out;
 263                 setting->last_change_serial = v_int;
 264
 265                 switch (type) {
 266                         case XSETTINGS_TYPE_INT:
 267                         result = fetch_card32 (&buffer, &v_int);
 268                         if (result != XSETTINGS_SUCCESS)
 269                                 goto out;
 270                         setting->data.v_int = (INT32)v_int;
 271                         break;
 272                         case XSETTINGS_TYPE_STRING:
 273                         result = fetch_card32 (&buffer, &v_int);
 274                         if (result != XSETTINGS_SUCCESS)
 275                                 goto out;
 276
 277                         pad_len = XSETTINGS_PAD (v_int, 4);
 278                         if (v_int + 1 == 0 || /* Guard against wrap-around */
 279                         BYTES_LEFT (&buffer) < pad_len) {
 280                                 result = XSETTINGS_ACCESS;
 281                                 goto out;
 282                         }
 283
 284                         setting->data.v_string = malloc (v_int + 1);
 285                         if (!setting->data.v_string) {
 286                                 result = XSETTINGS_NO_MEM;
 287                                 goto out;
 288                         }
 289
 290                         memcpy (setting->data.v_string, buffer.pos, v_int);
 291                         setting->data.v_string[v_int] = '\0';
 292                         buffer.pos += pad_len;
 293                         break;
 294                         case XSETTINGS_TYPE_COLOR:
 295                         result = fetch_ushort (&buffer, &setting->data.v_color.red);
 296                         if (result != XSETTINGS_SUCCESS)
 297                                 goto out;
 298                         result = fetch_ushort (&buffer, &setting->data.v_color.green);
 299                         if (result != XSETTINGS_SUCCESS)
 300                                 goto out;
 301                         result = fetch_ushort (&buffer, &setting->data.v_color.blue);
 302                         if (result != XSETTINGS_SUCCESS)
 303                                 goto out;
 304                         result = fetch_ushort (&buffer, &setting->data.v_color.alpha);
 305                         if (result != XSETTINGS_SUCCESS)
 306                                 goto out;
 307                         break;
 308                         default:
 309                         /* Quietly ignore unknown types */
 310                         break;
 311                 }
 312
 313                 setting->type = type;
 314
 315                 result = xsettings_list_insert (&settings, setting);
 316                 if (result != XSETTINGS_SUCCESS)
 317                 goto out;
 318
 319                 setting = NULL;
 320         }
 321
 322         out:
 323
 324         if (result != XSETTINGS_SUCCESS) {
 325                 switch (result) {
 326                         case XSETTINGS_NO_MEM:
 327                         fprintf(stderr, "Out of memory reading XSETTINGS property\n");
 328                         break;
 329                         case XSETTINGS_ACCESS:
 330                         fprintf(stderr, "Invalid XSETTINGS property (read off end)\n");
 331                         break;
 332                         case XSETTINGS_DUPLICATE_ENTRY:
 333                         fprintf (stderr, "Duplicate XSETTINGS entry for '%s'\n", setting->name);
 334                         case XSETTINGS_FAILED:
 335                         case XSETTINGS_SUCCESS:
 336                         case XSETTINGS_NO_ENTRY:
 337                         break;
 338                 }
 339
 340                 if (setting)
 341                         xsettings_setting_free (setting);
 342
 343                 xsettings_list_free (settings);
 344                 settings = NULL;
 345         }
 346
 347         return settings;
 348 }
 349
 350
 351 static void read_settings (XSettingsClient *client)
 352 {
 353         Atom type;
 354         int format;
 355         unsigned long n_items;
 356         unsigned long bytes_after;
 357         unsigned char *data;
 358         int result;
 359
 360         int (*old_handler) (Display *, XErrorEvent *);
 361
 362         XSettingsList *old_list = client->settings;
 363         client->settings = NULL;
 364         printf("read_settings 1\n");
 365
 366         old_handler = XSetErrorHandler (ignore_errors);
 367         result = XGetWindowProperty (client->display, client->manager_window, server.atom._XSETTINGS_SETTINGS, 0, LONG_MAX, False, server.atom._XSETTINGS_SETTINGS, &type, &format, &n_items, &bytes_after, &data);
 368         XSetErrorHandler (old_handler);
 369
 370         if (result == Success && type == server.atom._XSETTINGS_SETTINGS) {
 371                 if (format != 8) {
 372                         fprintf (stderr, "Invalid format for XSETTINGS property %d", format);
 373                 }
 374                 else
 375                         client->settings = parse_settings (data, n_items);
 376                 XFree (data);
 377         }
 378
 379         notify_changes (client, old_list);
 380         xsettings_list_free (old_list);
 381 }
 382
 383
 384 static void check_manager_window (XSettingsClient *client)
 385 {
 386         if (client->manager_window && client->watch)
 387                 client->watch (client->manager_window, False, 0, client->cb_data);
 388
 389         XGrabServer (client->display);
 390
 391         client->manager_window = XGetSelectionOwner (server.dsp, server.atom._XSETTINGS_SCREEN);
 392         if (client->manager_window)
 393                 XSelectInput (server.dsp, client->manager_window, PropertyChangeMask | StructureNotifyMask);
 394
 395         XUngrabServer (client->display);
 396         XFlush (client->display);
 397
 398         if (client->manager_window && client->watch)
 399                 client->watch (client->manager_window, True, PropertyChangeMask | StructureNotifyMask, client->cb_data);
 400
 401         read_settings (client);
 402 }
 403
 404
 405 XSettingsClient *xsettings_client_new (Display *display, int screen, XSettingsNotifyFunc notify, XSettingsWatchFunc watch, void *cb_data)
 406 {
 407         XSettingsClient *client;
 408
 409         client = malloc (sizeof *client);
 410         if (!client)
 411                 return NULL;
 412
 413         client->display = display;
 414         client->screen = screen;
 415         client->notify = notify;
 416         client->watch = watch;
 417         client->cb_data = cb_data;
 418
 419         client->manager_window = None;
 420         client->settings = NULL;
 421
 422         XGrabServer (server.dsp);
 423         client->manager_window = XGetSelectionOwner (server.dsp, server.atom._XSETTINGS_SCREEN);
 424         if (client->manager_window != None)
 425                 XSelectInput (server.dsp, client->manager_window, PropertyChangeMask | StructureNotifyMask);
 426         XUngrabServer (client->display);
 427         XFlush (client->display);
 428
 429         if (client->manager_window == None) {
 430                 printf("NO XSETTINGS manager, tint2 use config 'launcher_icon_theme'.\n");
 431                 free (client);
 432                 return NULL;
 433         }
 434
 435         if (client->watch)
 436                 client->watch (RootWindow (display, screen), True, StructureNotifyMask, client->cb_data);
 437
 438         check_manager_window (client);
 439
 440         return client;
 441 }
 442
 443
 444 void xsettings_client_destroy (XSettingsClient *client)
 445 {
 446         if (client->watch)
 447                 client->watch (RootWindow (client->display, client->screen), False, 0, client->cb_data);
 448         if (client->manager_window && client->watch)
 449                 client->watch (client->manager_window, False, 0, client->cb_data);
 450
 451         xsettings_list_free (client->settings);
 452         free (client);
 453 }
 454
 455
 456 XSettingsResult xsettings_client_get_setting (XSettingsClient *client, const char *name, XSettingsSetting **setting)
 457 {
 458         XSettingsSetting *search = xsettings_list_lookup (client->settings, name);
 459         if (search) {
 460                 *setting = xsettings_setting_copy (search);
 461                 return *setting ? XSETTINGS_SUCCESS : XSETTINGS_NO_MEM;
 462         }
 463         else
 464                 return XSETTINGS_NO_ENTRY;
 465 }
 466
 467
 468 Bool xsettings_client_process_event (XSettingsClient *client, XEvent *xev)
 469 {
 470         /* The checks here will not unlikely cause us to reread
 471         * the properties from the manager window a number of
 472         * times when the manager changes from A->B. But manager changes
 473         * are going to be pretty rare.
 474         */
 475         if (xev->xany.window == RootWindow (server.dsp, server.screen)) {
 476                 if (xev->xany.type == ClientMessage && xev->xclient.message_type == server.atom.MANAGER) {
 477                         check_manager_window (client);
 478                         return True;
 479                 }
 480         }
 481         else if (xev->xany.window == client->manager_window) {
 482                 if (xev->xany.type == DestroyNotify) {
 483                         check_manager_window (client);
 484                         return True;
 485                 }
 486                 else if (xev->xany.type == PropertyNotify) {
 487                         read_settings (client);
 488                         return True;
 489                 }
 490         }
 491
 492         return False;
 493 }
 494