src/xsettings.c

   1 /* Functions for handle font and other changes dynamically.
   2    Copyright (C) 2009, 2010
   3                  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include <config.h>
  21 #include <limits.h>
  22 #include <setjmp.h>
  23 #include <fcntl.h>
  24 #include "lisp.h"
  25 #include "xterm.h"
  26 #include "xsettings.h"
  27 #include "frame.h"
  28 #include "keyboard.h"
  29 #include "blockinput.h"
  30 #include "termhooks.h"
  31 #include "termopts.h"
  32
  33 #include <X11/Xproto.h>
  34
  35 #ifdef HAVE_GCONF
  36 #include <gconf/gconf-client.h>
  37 #endif
  38 #ifdef HAVE_XFT
  39 #include <X11/Xft/Xft.h>
  40 #endif
  41
  42 static char *current_mono_font;
  43 static char *current_font;
  44 static struct x_display_info *first_dpyinfo;
  45 static Lisp_Object Qmonospace_font_name, Qfont_name, Qfont_render,
  46   Qtool_bar_style;
  47 static int use_system_font;
  48 static Lisp_Object Vxft_settings;
  49 static Lisp_Object current_tool_bar_style;
  50
  51 #ifdef HAVE_GCONF
  52 static GConfClient *gconf_client;
  53 #endif
  54
  55
  56 static void
  57 store_config_changed_event (arg, display_name)
  58      Lisp_Object arg;
  59      Lisp_Object display_name;
  60 {
  61   struct input_event event;
  62   EVENT_INIT (event);
  63   event.kind = CONFIG_CHANGED_EVENT;
  64   event.frame_or_window = display_name;
  65   event.arg = arg;
  66   kbd_buffer_store_event (&event);
  67 }
  68
  69 #define XSETTINGS_FONT_NAME       "Gtk/FontName"
  70 #define XSETTINGS_TOOL_BAR_STYLE  "Gtk/ToolbarStyle"
  71
  72 enum {
  73   SEEN_AA         = 0x01,
  74   SEEN_HINTING    = 0x02,
  75   SEEN_RGBA       = 0x04,
  76   SEEN_LCDFILTER  = 0x08,
  77   SEEN_HINTSTYLE  = 0x10,
  78   SEEN_DPI        = 0x20,
  79   SEEN_FONT       = 0x40,
  80   SEEN_TB_STYLE   = 0x80,
  81 };
  82 struct xsettings
  83 {
  84 #ifdef HAVE_XFT
  85   FcBool aa, hinting;
  86   int rgba, lcdfilter, hintstyle;
  87   double dpi;
  88 #endif
  89
  90   char *font;
  91   char *tb_style;
  92
  93   unsigned seen;
  94 };
  95
  96 #ifdef HAVE_GCONF
  97
  98 #define SYSTEM_MONO_FONT     "/desktop/gnome/interface/monospace_font_name"
  99 #define SYSTEM_FONT          "/desktop/gnome/interface/font_name"
 100
 101 /* Callback called when something changed in GConf that we care about,
 102    that is SYSTEM_MONO_FONT.  */
 103
 104 static void
 105 something_changedCB (client, cnxn_id, entry, user_data)
 106      GConfClient *client;
 107      guint cnxn_id;
 108      GConfEntry *entry;
 109      gpointer user_data;
 110 {
 111   GConfValue *v = gconf_entry_get_value (entry);
 112
 113   if (!v) return;
 114   if (v->type == GCONF_VALUE_STRING)
 115     {
 116       const char *value = gconf_value_get_string (v);
 117       int i;
 118       if (current_mono_font != NULL && strcmp (value, current_mono_font) == 0)
 119         return; /* No change. */
 120
 121       xfree (current_mono_font);
 122       current_mono_font = xstrdup (value);
 123     }
 124
 125
 126   if (first_dpyinfo != NULL)
 127     {
 128       /* Check if display still open */
 129       struct x_display_info *dpyinfo;
 130       int found = 0;
 131       for (dpyinfo = x_display_list; !found && dpyinfo; dpyinfo = dpyinfo->next)
 132         found = dpyinfo == first_dpyinfo;
 133
 134       if (found && use_system_font)
 135         store_config_changed_event (Qmonospace_font_name,
 136                                     XCAR (first_dpyinfo->name_list_element));
 137     }
 138 }
 139 #endif /* HAVE_GCONF */
 140
 141 #ifdef HAVE_XFT
 142
 143 /* Older fontconfig versions don't have FC_LCD_*.  */
 144 #ifndef FC_LCD_NONE
 145 #define FC_LCD_NONE 0
 146 #endif
 147 #ifndef FC_LCD_DEFAULT
 148 #define FC_LCD_DEFAULT 1
 149 #endif
 150 #ifndef FC_LCD_FILTER
 151 #define FC_LCD_FILTER "lcdfilter"
 152 #endif
 153
 154 #endif /* HAVE_XFT */
 155
 156 /* Find the window that contains the XSETTINGS property values.  */
 157
 158 static void
 159 get_prop_window (dpyinfo)
 160      struct x_display_info *dpyinfo;
 161 {
 162   Display *dpy = dpyinfo->display;
 163
 164   XGrabServer (dpy);
 165   dpyinfo->xsettings_window = XGetSelectionOwner (dpy,
 166                                                   dpyinfo->Xatom_xsettings_sel);
 167   if (dpyinfo->xsettings_window != None)
 168     /* Select events so we can detect if window is deleted or if settings
 169        are changed.  */
 170     XSelectInput (dpy, dpyinfo->xsettings_window,
 171                   PropertyChangeMask|StructureNotifyMask);
 172
 173   XUngrabServer (dpy);
 174 }
 175
 176 #define SWAP32(nr) (((nr) << 24) | (((nr) << 8) & 0xff0000)     \
 177                     | (((nr) >> 8) & 0xff00) | ((nr) >> 24))
 178 #define SWAP16(nr) (((nr) << 8) | ((nr) >> 8))
 179 #define PAD(nr)    (((nr) + 3) & ~3)
 180
 181 /* Parse xsettings and extract those that deal with Xft.
 182    See http://freedesktop.org/wiki/Specifications/XSettingsRegistry
 183    and http://standards.freedesktop.org/xsettings-spec/xsettings-spec-0.5.html.
 184
 185    Layout of prop.  First is a header:
 186
 187    bytes   type     what
 188    ------------------------------------
 189    1      CARD8    byte-order
 190    3               unused
 191    4      CARD32   SERIAL
 192    4      CARD32   N_SETTINGS
 193
 194    Then N_SETTINGS records, with header:
 195
 196    bytes   type          what
 197    ------------------------------------
 198    1      SETTING_TYPE  type (0 = integer, 1 = string, 2 RGB color).
 199    1                    unused
 200    2      CARD16        n == name-length
 201    n      STRING8       name
 202    p                    unused, p=pad_to_even_4(n)
 203    4      CARD32        last-change-serial
 204
 205    and then the value, For string:
 206
 207    bytes   type          what
 208    ------------------------------------
 209    4      CARD32        n = value-length
 210    n      STRING8       value
 211    p                    unused, p=pad_to_even_4(n)
 212
 213    For integer:
 214
 215    bytes   type          what
 216    ------------------------------------
 217    4      INT32         value
 218
 219    For RGB color:
 220
 221    bytes   type          what
 222    ------------------------------------
 223    2      CARD16        red
 224    2      CARD16        blue
 225    2      CARD16        green
 226    2      CARD16        alpha
 227
 228    Returns non-zero if some Xft settings was seen, zero otherwise.
 229 */
 230
 231 static int
 232 parse_settings (prop, bytes, settings)
 233      unsigned char *prop;
 234      unsigned long bytes;
 235      struct xsettings *settings;
 236 {
 237   Lisp_Object byteorder = Fbyteorder ();
 238   int my_bo = XFASTINT (byteorder) == 'B' ? MSBFirst : LSBFirst;
 239   int that_bo = prop[0];
 240   CARD32 n_settings;
 241   int bytes_parsed = 0;
 242   int settings_seen = 0;
 243   int i = 0;
 244
 245   /* First 4 bytes is a serial number, skip that.  */
 246
 247   if (bytes < 12) return BadLength;
 248   memcpy (&n_settings, prop+8, 4);
 249   if (my_bo != that_bo) n_settings = SWAP32 (n_settings);
 250   bytes_parsed = 12;
 251
 252   memset (settings, 0, sizeof (*settings));
 253
 254   while (bytes_parsed+4 < bytes && settings_seen < 7
 255          && i < n_settings)
 256     {
 257       int type = prop[bytes_parsed++];
 258       CARD16 nlen;
 259       CARD32 vlen, ival = 0;
 260       char name[128]; /* The names we are looking for are not this long.  */
 261       char sval[128]; /* The values we are looking for are not this long.  */
 262       int want_this;
 263       int to_cpy;
 264
 265       sval[0] = '\0';
 266       ++i;
 267       ++bytes_parsed; /* Padding */
 268
 269       memcpy (&nlen, prop+bytes_parsed, 2);
 270       bytes_parsed += 2;
 271       if (my_bo != that_bo) nlen = SWAP16 (nlen);
 272       if (bytes_parsed+nlen > bytes) return BadLength;
 273       to_cpy = nlen > 127 ? 127 : nlen;
 274       memcpy (name, prop+bytes_parsed, to_cpy);
 275       name[to_cpy] = '\0';
 276
 277       bytes_parsed += nlen;
 278       bytes_parsed = PAD (bytes_parsed);
 279
 280       bytes_parsed += 4; /* Skip serial for this value */
 281       if (bytes_parsed > bytes) return BadLength;
 282
 283       want_this =
 284 #ifdef HAVE_XFT
 285         (nlen > 6 && strncmp (name, "Xft/", 4) == 0)
 286         ||
 287 #endif
 288         (strcmp (XSETTINGS_FONT_NAME, name) == 0)
 289         || (strcmp (XSETTINGS_TOOL_BAR_STYLE, name) == 0);
 290
 291       switch (type)
 292         {
 293         case 0: /* Integer */
 294           if (bytes_parsed+4 > bytes) return BadLength;
 295           if (want_this)
 296             {
 297               memcpy (&ival, prop+bytes_parsed, 4);
 298               if (my_bo != that_bo) ival = SWAP32 (ival);
 299             }
 300           bytes_parsed += 4;
 301           break;
 302
 303         case 1: /* String */
 304           if (bytes_parsed+4 > bytes) return BadLength;
 305           memcpy (&vlen, prop+bytes_parsed, 4);
 306           bytes_parsed += 4;
 307           if (my_bo != that_bo) vlen = SWAP32 (vlen);
 308           if (want_this)
 309             {
 310               to_cpy = vlen > 127 ? 127 : vlen;
 311               memcpy (sval, prop+bytes_parsed, to_cpy);
 312               sval[to_cpy] = '\0';
 313             }
 314           bytes_parsed += vlen;
 315           bytes_parsed = PAD (bytes_parsed);
 316           break;
 317
 318         case 2: /* RGB value */
 319           /* No need to parse this */
 320           if (bytes_parsed+8 > bytes) return BadLength;
 321           bytes_parsed += 8; /* 4 values (r, b, g, alpha), 2 bytes each.  */
 322           break;
 323
 324         default: /* Parse Error */
 325           return BadValue;
 326         }
 327
 328       if (want_this)
 329         {
 330           ++settings_seen;
 331           if (strcmp (name, XSETTINGS_FONT_NAME) == 0)
 332             {
 333               settings->font = xstrdup (sval);
 334               settings->seen |= SEEN_FONT;
 335             }
 336           else if (strcmp (name, XSETTINGS_TOOL_BAR_STYLE) == 0)
 337             {
 338               settings->tb_style = xstrdup (sval);
 339               settings->seen |= SEEN_TB_STYLE;
 340             }
 341 #ifdef HAVE_XFT
 342           else if (strcmp (name, "Xft/Antialias") == 0)
 343             {
 344               settings->seen |= SEEN_AA;
 345               settings->aa = ival != 0;
 346             }
 347           else if (strcmp (name, "Xft/Hinting") == 0)
 348             {
 349               settings->seen |= SEEN_HINTING;
 350               settings->hinting = ival != 0;
 351             }
 352           else if (strcmp (name, "Xft/HintStyle") == 0)
 353             {
 354               settings->seen |= SEEN_HINTSTYLE;
 355               if (strcmp (sval, "hintnone") == 0)
 356                 settings->hintstyle = FC_HINT_NONE;
 357               else if (strcmp (sval, "hintslight") == 0)
 358                 settings->hintstyle = FC_HINT_SLIGHT;
 359               else if (strcmp (sval, "hintmedium") == 0)
 360                 settings->hintstyle = FC_HINT_MEDIUM;
 361               else if (strcmp (sval, "hintfull") == 0)
 362                 settings->hintstyle = FC_HINT_FULL;
 363               else
 364                 settings->seen &= ~SEEN_HINTSTYLE;
 365             }
 366           else if (strcmp (name, "Xft/RGBA") == 0)
 367             {
 368               settings->seen |= SEEN_RGBA;
 369               if (strcmp (sval, "none") == 0)
 370                 settings->rgba = FC_RGBA_NONE;
 371               else if (strcmp (sval, "rgb") == 0)
 372                 settings->rgba = FC_RGBA_RGB;
 373               else if (strcmp (sval, "bgr") == 0)
 374                 settings->rgba = FC_RGBA_BGR;
 375               else if (strcmp (sval, "vrgb") == 0)
 376                 settings->rgba = FC_RGBA_VRGB;
 377               else if (strcmp (sval, "vbgr") == 0)
 378                 settings->rgba = FC_RGBA_VBGR;
 379               else
 380                 settings->seen &= ~SEEN_RGBA;
 381             }
 382           else if (strcmp (name, "Xft/DPI") == 0)
 383             {
 384               settings->seen |= SEEN_DPI;
 385               settings->dpi = (double)ival/1024.0;
 386             }
 387           else if (strcmp (name, "Xft/lcdfilter") == 0)
 388             {
 389               settings->seen |= SEEN_LCDFILTER;
 390               if (strcmp (sval, "none") == 0)
 391                 settings->lcdfilter = FC_LCD_NONE;
 392               else if (strcmp (sval, "lcddefault") == 0)
 393                 settings->lcdfilter = FC_LCD_DEFAULT;
 394               else
 395                 settings->seen &= ~SEEN_LCDFILTER;
 396             }
 397 #endif /* HAVE_XFT */
 398         }
 399     }
 400
 401   return settings_seen;
 402 }
 403
 404 static int
 405 read_settings (dpyinfo, settings)
 406      struct x_display_info *dpyinfo;
 407      struct xsettings *settings;
 408 {
 409   long long_len;
 410   Atom act_type;
 411   int act_form;
 412   unsigned long nitems, bytes_after;
 413   unsigned char *prop = NULL;
 414   Display *dpy = dpyinfo->display;
 415   int rc;
 416
 417   x_catch_errors (dpy);
 418   rc = XGetWindowProperty (dpy,
 419                            dpyinfo->xsettings_window,
 420                            dpyinfo->Xatom_xsettings_prop,
 421                            0, LONG_MAX, False, AnyPropertyType,
 422                            &act_type, &act_form, &nitems, &bytes_after,
 423                            &prop);
 424
 425   if (rc == Success && prop != NULL && act_form == 8 && nitems > 0
 426       && act_type == dpyinfo->Xatom_xsettings_prop)
 427     rc = parse_settings (prop, nitems, settings);
 428
 429   XFree (prop);
 430
 431   x_uncatch_errors ();
 432
 433   return rc != 0;
 434 }
 435
 436
 437 static void
 438 apply_xft_settings (dpyinfo, send_event_p, settings)
 439      struct x_display_info *dpyinfo;
 440      int send_event_p;
 441      struct xsettings *settings;
 442 {
 443 #ifdef HAVE_XFT
 444   FcPattern *pat;
 445   struct xsettings oldsettings;
 446   int changed = 0;
 447   char buf[256];
 448
 449   memset (&oldsettings, 0, sizeof (oldsettings));
 450   buf[0] = '\0';
 451   pat = FcPatternCreate ();
 452   XftDefaultSubstitute (dpyinfo->display,
 453                         XScreenNumberOfScreen (dpyinfo->screen),
 454                         pat);
 455   FcPatternGetBool (pat, FC_ANTIALIAS, 0, &oldsettings.aa);
 456   FcPatternGetBool (pat, FC_HINTING, 0, &oldsettings.hinting);
 457   FcPatternGetInteger (pat, FC_HINT_STYLE, 0, &oldsettings.hintstyle);
 458   FcPatternGetInteger (pat, FC_LCD_FILTER, 0, &oldsettings.lcdfilter);
 459   FcPatternGetInteger (pat, FC_RGBA, 0, &oldsettings.rgba);
 460   FcPatternGetDouble (pat, FC_DPI, 0, &oldsettings.dpi);
 461
 462   if ((settings->seen & SEEN_AA) != 0 && oldsettings.aa != settings->aa)
 463     {
 464       FcPatternDel (pat, FC_ANTIALIAS);
 465       FcPatternAddBool (pat, FC_ANTIALIAS, settings->aa);
 466       ++changed;
 467       oldsettings.aa = settings->aa;
 468     }
 469   sprintf (buf, "Antialias: %d", oldsettings.aa);
 470
 471   if ((settings->seen & SEEN_HINTING) != 0
 472       && oldsettings.hinting != settings->hinting)
 473     {
 474       FcPatternDel (pat, FC_HINTING);
 475       FcPatternAddBool (pat, FC_HINTING, settings->hinting);
 476       ++changed;
 477       oldsettings.hinting = settings->hinting;
 478     }
 479   if (strlen (buf) > 0) strcat (buf, ", ");
 480   sprintf (buf+strlen (buf), "Hinting: %d", oldsettings.hinting);
 481   if ((settings->seen & SEEN_RGBA) != 0 && oldsettings.rgba != settings->rgba)
 482     {
 483       FcPatternDel (pat, FC_RGBA);
 484       FcPatternAddInteger (pat, FC_RGBA, settings->rgba);
 485       oldsettings.rgba = settings->rgba;
 486       ++changed;
 487     }
 488   if (strlen (buf) > 0) strcat (buf, ", ");
 489   sprintf (buf+strlen (buf), "RGBA: %d", oldsettings.rgba);
 490
 491   /* Older fontconfig versions don't have FC_LCD_FILTER. */
 492   if ((settings->seen & SEEN_LCDFILTER) != 0
 493       && oldsettings.lcdfilter != settings->lcdfilter)
 494     {
 495       FcPatternDel (pat, FC_LCD_FILTER);
 496       FcPatternAddInteger (pat, FC_LCD_FILTER, settings->lcdfilter);
 497       ++changed;
 498       oldsettings.lcdfilter = settings->lcdfilter;
 499     }
 500   if (strlen (buf) > 0) strcat (buf, ", ");
 501   sprintf (buf+strlen (buf), "LCDFilter: %d", oldsettings.lcdfilter);
 502
 503   if ((settings->seen & SEEN_HINTSTYLE) != 0
 504       && oldsettings.hintstyle != settings->hintstyle)
 505     {
 506       FcPatternDel (pat, FC_HINT_STYLE);
 507       FcPatternAddInteger (pat, FC_HINT_STYLE, settings->hintstyle);
 508       ++changed;
 509       oldsettings.hintstyle = settings->hintstyle;
 510     }
 511   if (strlen (buf) > 0) strcat (buf, ", ");
 512   sprintf (buf+strlen (buf), "Hintstyle: %d", oldsettings.hintstyle);
 513
 514   if ((settings->seen & SEEN_DPI) != 0 && oldsettings.dpi != settings->dpi
 515       && settings->dpi > 0)
 516     {
 517       Lisp_Object frame, tail;
 518
 519       FcPatternDel (pat, FC_DPI);
 520       FcPatternAddDouble (pat, FC_DPI, settings->dpi);
 521       ++changed;
 522       oldsettings.dpi = settings->dpi;
 523
 524       /* Change the DPI on this display and all frames on the display.  */
 525       dpyinfo->resy = dpyinfo->resx = settings->dpi;
 526       FOR_EACH_FRAME (tail, frame)
 527         if (FRAME_X_P (XFRAME (frame))
 528             && FRAME_X_DISPLAY_INFO (XFRAME (frame)) == dpyinfo)
 529           XFRAME (frame)->resy = XFRAME (frame)->resx = settings->dpi;
 530     }
 531
 532   if (strlen (buf) > 0) strcat (buf, ", ");
 533   sprintf (buf+strlen (buf), "DPI: %lf", oldsettings.dpi);
 534
 535   if (changed)
 536     {
 537       XftDefaultSet (dpyinfo->display, pat);
 538       if (send_event_p)
 539         store_config_changed_event (Qfont_render,
 540                                     XCAR (dpyinfo->name_list_element));
 541       Vxft_settings = make_string (buf, strlen (buf));
 542     }
 543   else
 544     FcPatternDestroy (pat);
 545 #endif /* HAVE_XFT */
 546 }
 547
 548 static void
 549 read_and_apply_settings (dpyinfo, send_event_p)
 550      struct x_display_info *dpyinfo;
 551      int send_event_p;
 552 {
 553   struct xsettings settings;
 554   Lisp_Object dpyname = XCAR (dpyinfo->name_list_element);
 555
 556   if (!read_settings (dpyinfo, &settings))
 557     return;
 558
 559   apply_xft_settings (dpyinfo, True, &settings);
 560   if (settings.seen & SEEN_TB_STYLE)
 561     {
 562       Lisp_Object style = Qnil;
 563       if (strcmp (settings.tb_style, "both") == 0)
 564         style = Qboth;
 565       else if (strcmp (settings.tb_style, "both-horiz") == 0)
 566         style = Qboth_horiz;
 567       else if (strcmp (settings.tb_style, "icons") == 0)
 568         style = Qimage;
 569       else if (strcmp (settings.tb_style, "text") == 0)
 570         style = Qtext;
 571       if (!NILP (style) && !EQ (style, current_tool_bar_style))
 572         {
 573           current_tool_bar_style = style;
 574           if (send_event_p)
 575             store_config_changed_event (Qtool_bar_style, dpyname);
 576         }
 577       free (settings.tb_style);
 578     }
 579
 580   if (settings.seen & SEEN_FONT)
 581     {
 582       if (!current_font || strcmp (current_font, settings.font) != 0)
 583         {
 584           free (current_font);
 585           current_font = settings.font;
 586           if (send_event_p)
 587             store_config_changed_event (Qfont_name, dpyname);
 588         }
 589       else
 590         free (settings.font);
 591     }
 592 }
 593
 594 void
 595 xft_settings_event (dpyinfo, event)
 596      struct x_display_info *dpyinfo;
 597      XEvent *event;
 598 {
 599   int check_window_p = 0;
 600   int apply_settings = 0;
 601
 602   switch (event->type)
 603     {
 604     case DestroyNotify:
 605       if (dpyinfo->xsettings_window == event->xany.window)
 606         check_window_p = 1;
 607       break;
 608
 609     case ClientMessage:
 610       if (event->xclient.message_type == dpyinfo->Xatom_xsettings_mgr
 611           && event->xclient.data.l[1] == dpyinfo->Xatom_xsettings_sel
 612           && event->xclient.window == dpyinfo->root_window)
 613         check_window_p = 1;
 614       break;
 615
 616     case PropertyNotify:
 617       if (event->xproperty.window == dpyinfo->xsettings_window
 618           && event->xproperty.state == PropertyNewValue
 619           && event->xproperty.atom == dpyinfo->Xatom_xsettings_prop)
 620         apply_settings = 1;
 621       break;
 622     }
 623
 624
 625   if (check_window_p)
 626     {
 627       dpyinfo->xsettings_window = None;
 628       get_prop_window (dpyinfo);
 629       if (dpyinfo->xsettings_window != None)
 630         apply_settings = 1;
 631     }
 632
 633   if (apply_settings)
 634     read_and_apply_settings (dpyinfo, True);
 635 }
 636
 637
 638 static void
 639 init_gconf ()
 640 {
 641 #if defined (HAVE_GCONF) && defined (HAVE_XFT)
 642   int i;
 643   char *s;
 644
 645   g_type_init ();
 646   gconf_client = gconf_client_get_default ();
 647   s = gconf_client_get_string (gconf_client, SYSTEM_MONO_FONT, NULL);
 648   if (s)
 649     {
 650       current_mono_font = xstrdup (s);
 651       g_free (s);
 652     }
 653   s = gconf_client_get_string (gconf_client, SYSTEM_FONT, NULL);
 654   if (s)
 655     {
 656       current_font = xstrdup (s);
 657       g_free (s);
 658     }
 659   gconf_client_set_error_handling (gconf_client, GCONF_CLIENT_HANDLE_NONE);
 660   gconf_client_add_dir (gconf_client,
 661                         SYSTEM_MONO_FONT,
 662                         GCONF_CLIENT_PRELOAD_ONELEVEL,
 663                         NULL);
 664   gconf_client_notify_add (gconf_client,
 665                            SYSTEM_MONO_FONT,
 666                            something_changedCB,
 667                            NULL, NULL, NULL);
 668 #endif /* HAVE_GCONF && HAVE_XFT */
 669 }
 670
 671 static void
 672 init_xsettings (dpyinfo)
 673      struct x_display_info *dpyinfo;
 674 {
 675   char sel[64];
 676   Display *dpy = dpyinfo->display;
 677
 678   BLOCK_INPUT;
 679
 680   sprintf (sel, "_XSETTINGS_S%d", XScreenNumberOfScreen (dpyinfo->screen));
 681   dpyinfo->Xatom_xsettings_sel = XInternAtom (dpy, sel, False);
 682   dpyinfo->Xatom_xsettings_prop = XInternAtom (dpy,
 683                                                "_XSETTINGS_SETTINGS",
 684                                                False);
 685   dpyinfo->Xatom_xsettings_mgr = XInternAtom (dpy, "MANAGER", False);
 686
 687   /* Select events so we can detect client messages sent when selection
 688      owner changes.  */
 689   XSelectInput (dpy, dpyinfo->root_window, StructureNotifyMask);
 690
 691   get_prop_window (dpyinfo);
 692   if (dpyinfo->xsettings_window != None)
 693     read_and_apply_settings (dpyinfo, False);
 694
 695   UNBLOCK_INPUT;
 696 }
 697
 698 void
 699 xsettings_initialize (dpyinfo)
 700      struct x_display_info *dpyinfo;
 701 {
 702   if (first_dpyinfo == NULL) first_dpyinfo = dpyinfo;
 703   init_gconf ();
 704   init_xsettings (dpyinfo);
 705 }
 706
 707 const char *
 708 xsettings_get_system_font ()
 709 {
 710   return current_mono_font;
 711 }
 712
 713 const char *
 714 xsettings_get_system_normal_font ()
 715 {
 716   return current_font;
 717 }
 718
 719 DEFUN ("font-get-system-normal-font", Ffont_get_system_normal_font,
 720        Sfont_get_system_normal_font,
 721        0, 0, 0,
 722        doc: /* Get the system default font. */)
 723   ()
 724 {
 725   return current_font && use_system_font
 726     ? make_string (current_font, strlen (current_font))
 727     : Qnil;
 728 }
 729
 730 DEFUN ("font-get-system-font", Ffont_get_system_font, Sfont_get_system_font,
 731        0, 0, 0,
 732        doc: /* Get the system default monospaced font. */)
 733   ()
 734 {
 735   return current_mono_font && use_system_font
 736     ? make_string (current_mono_font, strlen (current_mono_font))
 737     : Qnil;
 738 }
 739
 740 DEFUN ("tool-bar-get-system-style", Ftool_bar_get_system_style, Stool_bar_get_system_style,
 741        0, 0, 0,
 742        doc: /* Get the system tool bar style.
 743 If no system tool bar style is known, return `tool-bar-style' if set to a
 744 known style.  Otherwise return image.  */)
 745   ()
 746 {
 747   if (EQ (Vtool_bar_style, Qimage)
 748       || EQ (Vtool_bar_style, Qtext)
 749       || EQ (Vtool_bar_style, Qboth)
 750       || EQ (Vtool_bar_style, Qboth_horiz))
 751     return Vtool_bar_style;
 752   if (!NILP (current_tool_bar_style))
 753     return current_tool_bar_style;
 754   return Qimage;
 755 }
 756
 757 void
 758 syms_of_xsettings ()
 759 {
 760   current_mono_font = NULL;
 761   current_font = NULL;
 762   first_dpyinfo = NULL;
 763 #ifdef HAVE_GCONF
 764   gconf_client = NULL;
 765 #endif
 766
 767   Qmonospace_font_name = intern_c_string ("monospace-font-name");
 768   staticpro (&Qmonospace_font_name);
 769   Qfont_name = intern_c_string ("font-name");
 770   staticpro (&Qfont_name);
 771   Qfont_render = intern_c_string ("font-render");
 772   staticpro (&Qfont_render);
 773   defsubr (&Sfont_get_system_font);
 774   defsubr (&Sfont_get_system_normal_font);
 775
 776   DEFVAR_BOOL ("font-use-system-font", &use_system_font,
 777     doc: /* *Non-nil means to use the system defined font.  */);
 778   use_system_font = 0;
 779
 780   DEFVAR_LISP ("xft-settings", &Vxft_settings,
 781                doc: /* Font settings applied to Xft.  */);
 782   Vxft_settings = make_string ("", 0);
 783
 784 #ifdef HAVE_XFT
 785   Fprovide (intern_c_string ("font-render-setting"), Qnil);
 786 #ifdef HAVE_GCONF
 787   Fprovide (intern_c_string ("system-font-setting"), Qnil);
 788 #endif
 789 #endif
 790
 791   current_tool_bar_style = Qnil;
 792   Qtool_bar_style = intern_c_string ("tool-bar-style");
 793   staticpro (&Qtool_bar_style);
 794   defsubr (&Stool_bar_get_system_style);
 795
 796   Fprovide (intern_c_string ("dynamic-setting"), Qnil);
 797 }
 798
 799 /* arch-tag: 541716ed-2e6b-42e1-8212-3197e01ea61d
 800    (do not change this comment) */