code.delx.au - gnu-emacs/blob - src/xsettings.c

   1 /* Functions for handling font and other changes dynamically.
   2
   3 Copyright (C) 2009-2011  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
  22 #include <float.h>
  23 #include <limits.h>
  24 #include <setjmp.h>
  25 #include <fcntl.h>
  26 #include "lisp.h"
  27 #include "xterm.h"
  28 #include "xsettings.h"
  29 #include "frame.h"
  30 #include "keyboard.h"
  31 #include "blockinput.h"
  32 #include "termhooks.h"
  33 #include "termopts.h"
  34
  35 #include <X11/Xproto.h>
  36
  37 #ifdef HAVE_GSETTINGS
  38 #include <glib-object.h>
  39 #include <gio/gio.h>
  40 #else
  41 #ifdef HAVE_GCONF
  42 #include <gconf/gconf-client.h>
  43 #endif
  44 #endif
  45
  46 #ifdef HAVE_XFT
  47 #include <X11/Xft/Xft.h>
  48 #endif
  49
  50 static char *current_mono_font;
  51 static char *current_font;
  52 static struct x_display_info *first_dpyinfo;
  53 static Lisp_Object Qmonospace_font_name, Qfont_name, Qfont_render,
  54   Qtool_bar_style;
  55 static Lisp_Object current_tool_bar_style;
  56
  57 static void
  58 store_config_changed_event (Lisp_Object arg, Lisp_Object display_name)
  59 {
  60   struct input_event event;
  61   EVENT_INIT (event);
  62   event.kind = CONFIG_CHANGED_EVENT;
  63   event.frame_or_window = display_name;
  64   event.arg = arg;
  65   kbd_buffer_store_event (&event);
  66 }
  67
  68 static void
  69 store_monospaced_changed (const char *newfont)
  70 {
  71   if (current_mono_font != NULL && strcmp (newfont, current_mono_font) == 0)
  72     return; /* No change. */
  73
  74   xfree (current_mono_font);
  75   current_mono_font = xstrdup (newfont);
  76
  77   if (first_dpyinfo != NULL && use_system_font)
  78     {
  79       /* Check if display still open */
  80       struct x_display_info *dpyinfo;
  81       int found = 0;
  82       for (dpyinfo = x_display_list; !found && dpyinfo; dpyinfo = dpyinfo->next)
  83         found = dpyinfo == first_dpyinfo;
  84
  85       if (found)
  86         store_config_changed_event (Qmonospace_font_name,
  87                                     XCAR (first_dpyinfo->name_list_element));
  88     }
  89 }
  90
  91
  92 #ifdef HAVE_GSETTINGS
  93 static GSettings *gsettings_client;
  94 #else
  95 #ifdef HAVE_GCONF
  96 static GConfClient *gconf_client;
  97 #endif
  98 #endif
  99
 100
 101 #define XSETTINGS_FONT_NAME       "Gtk/FontName"
 102 #define XSETTINGS_TOOL_BAR_STYLE  "Gtk/ToolbarStyle"
 103
 104 enum {
 105   SEEN_AA         = 0x01,
 106   SEEN_HINTING    = 0x02,
 107   SEEN_RGBA       = 0x04,
 108   SEEN_LCDFILTER  = 0x08,
 109   SEEN_HINTSTYLE  = 0x10,
 110   SEEN_DPI        = 0x20,
 111   SEEN_FONT       = 0x40,
 112   SEEN_TB_STYLE   = 0x80,
 113 };
 114 struct xsettings
 115 {
 116 #ifdef HAVE_XFT
 117   FcBool aa, hinting;
 118   int rgba, lcdfilter, hintstyle;
 119   double dpi;
 120 #endif
 121
 122   char *font;
 123   char *tb_style;
 124
 125   unsigned seen;
 126 };
 127
 128 #ifdef HAVE_GSETTINGS
 129 #define GSETTINGS_SCHEMA  "org.gnome.desktop.interface"
 130 #define SYSTEM_MONO_FONT  "monospace-font-name"
 131
 132 static void
 133 something_changedCB (GSettings *settings,
 134                      gchar *key,
 135                      gpointer user_data)
 136 {
 137   GVariant *val;
 138   if (strcmp (key, SYSTEM_MONO_FONT) != 0) return;
 139   val = g_settings_get_value (settings, SYSTEM_MONO_FONT);
 140   if (val)
 141     {
 142       g_variant_ref_sink (val);
 143       if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
 144         {
 145           const gchar *newfont = g_variant_get_string (val, NULL);
 146           store_monospaced_changed (newfont);
 147         }
 148       g_variant_unref (val);
 149     }
 150 }
 151
 152 #else
 153 #ifdef HAVE_GCONF
 154 #define SYSTEM_MONO_FONT  "/desktop/gnome/interface/monospace_font_name"
 155
 156 #ifdef HAVE_XFT
 157 # define SYSTEM_FONT       "/desktop/gnome/interface/font_name"
 158 #endif
 159
 160 /* Callback called when something changed in GConf that we care about,
 161    that is SYSTEM_MONO_FONT.  */
 162
 163 static void
 164 something_changedCB (GConfClient *client,
 165                      guint cnxn_id,
 166                      GConfEntry *entry,
 167                      gpointer user_data)
 168 {
 169   GConfValue *v = gconf_entry_get_value (entry);
 170
 171   if (!v) return;
 172   if (v->type == GCONF_VALUE_STRING)
 173     {
 174       const char *value = gconf_value_get_string (v);
 175       store_monospaced_changed (value);
 176     }
 177 }
 178
 179 #endif /* HAVE_GCONF */
 180 #endif /* ! HAVE_GSETTINGS */
 181
 182 #ifdef HAVE_XFT
 183
 184 /* Older fontconfig versions don't have FC_LCD_*.  */
 185 #ifndef FC_LCD_NONE
 186 #define FC_LCD_NONE 0
 187 #endif
 188 #ifndef FC_LCD_DEFAULT
 189 #define FC_LCD_DEFAULT 1
 190 #endif
 191 #ifndef FC_LCD_FILTER
 192 #define FC_LCD_FILTER "lcdfilter"
 193 #endif
 194
 195 #endif /* HAVE_XFT */
 196
 197 /* Find the window that contains the XSETTINGS property values.  */
 198
 199 static void
 200 get_prop_window (struct x_display_info *dpyinfo)
 201 {
 202   Display *dpy = dpyinfo->display;
 203
 204   XGrabServer (dpy);
 205   dpyinfo->xsettings_window = XGetSelectionOwner (dpy,
 206                                                   dpyinfo->Xatom_xsettings_sel);
 207   if (dpyinfo->xsettings_window != None)
 208     /* Select events so we can detect if window is deleted or if settings
 209        are changed.  */
 210     XSelectInput (dpy, dpyinfo->xsettings_window,
 211                   PropertyChangeMask|StructureNotifyMask);
 212
 213   XUngrabServer (dpy);
 214 }
 215
 216 #define SWAP32(nr) (((nr) << 24) | (((nr) << 8) & 0xff0000)     \
 217                     | (((nr) >> 8) & 0xff00) | ((nr) >> 24))
 218 #define SWAP16(nr) (((nr) << 8) | ((nr) >> 8))
 219 #define PAD(nr)    (((nr) + 3) & ~3)
 220
 221 /* Parse xsettings and extract those that deal with Xft.
 222    See http://freedesktop.org/wiki/Specifications/XSettingsRegistry
 223    and http://standards.freedesktop.org/xsettings-spec/xsettings-spec-0.5.html.
 224
 225    Layout of prop.  First is a header:
 226
 227    bytes   type     what
 228    ------------------------------------
 229    1      CARD8    byte-order
 230    3               unused
 231    4      CARD32   SERIAL
 232    4      CARD32   N_SETTINGS
 233
 234    Then N_SETTINGS records, with header:
 235
 236    bytes   type          what
 237    ------------------------------------
 238    1      SETTING_TYPE  type (0 = integer, 1 = string, 2 RGB color).
 239    1                    unused
 240    2      CARD16        n == name-length
 241    n      STRING8       name
 242    p                    unused, p=pad_to_even_4(n)
 243    4      CARD32        last-change-serial
 244
 245    and then the value, For string:
 246
 247    bytes   type          what
 248    ------------------------------------
 249    4      CARD32        n = value-length
 250    n      STRING8       value
 251    p                    unused, p=pad_to_even_4(n)
 252
 253    For integer:
 254
 255    bytes   type          what
 256    ------------------------------------
 257    4      INT32         value
 258
 259    For RGB color:
 260
 261    bytes   type          what
 262    ------------------------------------
 263    2      CARD16        red
 264    2      CARD16        blue
 265    2      CARD16        green
 266    2      CARD16        alpha
 267
 268    Returns non-zero if some Xft settings was seen, zero otherwise.
 269 */
 270
 271 static int
 272 parse_settings (unsigned char *prop,
 273                 long unsigned int bytes,
 274                 struct xsettings *settings)
 275 {
 276   Lisp_Object byteorder = Fbyteorder ();
 277   int my_bo = XFASTINT (byteorder) == 'B' ? MSBFirst : LSBFirst;
 278   int that_bo = prop[0];
 279   CARD32 n_settings;
 280   int bytes_parsed = 0;
 281   int settings_seen = 0;
 282   int i = 0;
 283
 284   /* First 4 bytes is a serial number, skip that.  */
 285
 286   if (bytes < 12) return BadLength;
 287   memcpy (&n_settings, prop+8, 4);
 288   if (my_bo != that_bo) n_settings = SWAP32 (n_settings);
 289   bytes_parsed = 12;
 290
 291   memset (settings, 0, sizeof (*settings));
 292
 293   while (bytes_parsed+4 < bytes && settings_seen < 7
 294          && i < n_settings)
 295     {
 296       int type = prop[bytes_parsed++];
 297       CARD16 nlen;
 298       CARD32 vlen, ival = 0;
 299       char name[128]; /* The names we are looking for are not this long.  */
 300       char sval[128]; /* The values we are looking for are not this long.  */
 301       int want_this;
 302       int to_cpy;
 303
 304       sval[0] = '\0';
 305       ++i;
 306       ++bytes_parsed; /* Padding */
 307
 308       memcpy (&nlen, prop+bytes_parsed, 2);
 309       bytes_parsed += 2;
 310       if (my_bo != that_bo) nlen = SWAP16 (nlen);
 311       if (bytes_parsed+nlen > bytes) return BadLength;
 312       to_cpy = nlen > 127 ? 127 : nlen;
 313       memcpy (name, prop+bytes_parsed, to_cpy);
 314       name[to_cpy] = '\0';
 315
 316       bytes_parsed += nlen;
 317       bytes_parsed = PAD (bytes_parsed);
 318
 319       bytes_parsed += 4; /* Skip serial for this value */
 320       if (bytes_parsed > bytes) return BadLength;
 321
 322       want_this =
 323 #ifdef HAVE_XFT
 324         (nlen > 6 && strncmp (name, "Xft/", 4) == 0)
 325         ||
 326 #endif
 327         (strcmp (XSETTINGS_FONT_NAME, name) == 0)
 328         || (strcmp (XSETTINGS_TOOL_BAR_STYLE, name) == 0);
 329
 330       switch (type)
 331         {
 332         case 0: /* Integer */
 333           if (bytes_parsed+4 > bytes) return BadLength;
 334           if (want_this)
 335             {
 336               memcpy (&ival, prop+bytes_parsed, 4);
 337               if (my_bo != that_bo) ival = SWAP32 (ival);
 338             }
 339           bytes_parsed += 4;
 340           break;
 341
 342         case 1: /* String */
 343           if (bytes_parsed+4 > bytes) return BadLength;
 344           memcpy (&vlen, prop+bytes_parsed, 4);
 345           bytes_parsed += 4;
 346           if (my_bo != that_bo) vlen = SWAP32 (vlen);
 347           if (want_this)
 348             {
 349               to_cpy = vlen > 127 ? 127 : vlen;
 350               memcpy (sval, prop+bytes_parsed, to_cpy);
 351               sval[to_cpy] = '\0';
 352             }
 353           bytes_parsed += vlen;
 354           bytes_parsed = PAD (bytes_parsed);
 355           break;
 356
 357         case 2: /* RGB value */
 358           /* No need to parse this */
 359           if (bytes_parsed+8 > bytes) return BadLength;
 360           bytes_parsed += 8; /* 4 values (r, b, g, alpha), 2 bytes each.  */
 361           break;
 362
 363         default: /* Parse Error */
 364           return BadValue;
 365         }
 366
 367       if (want_this)
 368         {
 369           ++settings_seen;
 370           if (strcmp (name, XSETTINGS_FONT_NAME) == 0)
 371             {
 372               settings->font = xstrdup (sval);
 373               settings->seen |= SEEN_FONT;
 374             }
 375           else if (strcmp (name, XSETTINGS_TOOL_BAR_STYLE) == 0)
 376             {
 377               settings->tb_style = xstrdup (sval);
 378               settings->seen |= SEEN_TB_STYLE;
 379             }
 380 #ifdef HAVE_XFT
 381           else if (strcmp (name, "Xft/Antialias") == 0)
 382             {
 383               settings->seen |= SEEN_AA;
 384               settings->aa = ival != 0;
 385             }
 386           else if (strcmp (name, "Xft/Hinting") == 0)
 387             {
 388               settings->seen |= SEEN_HINTING;
 389               settings->hinting = ival != 0;
 390             }
 391 # ifdef FC_HINT_STYLE
 392           else if (strcmp (name, "Xft/HintStyle") == 0)
 393             {
 394               settings->seen |= SEEN_HINTSTYLE;
 395               if (strcmp (sval, "hintnone") == 0)
 396                 settings->hintstyle = FC_HINT_NONE;
 397               else if (strcmp (sval, "hintslight") == 0)
 398                 settings->hintstyle = FC_HINT_SLIGHT;
 399               else if (strcmp (sval, "hintmedium") == 0)
 400                 settings->hintstyle = FC_HINT_MEDIUM;
 401               else if (strcmp (sval, "hintfull") == 0)
 402                 settings->hintstyle = FC_HINT_FULL;
 403               else
 404                 settings->seen &= ~SEEN_HINTSTYLE;
 405             }
 406 # endif
 407           else if (strcmp (name, "Xft/RGBA") == 0)
 408             {
 409               settings->seen |= SEEN_RGBA;
 410               if (strcmp (sval, "none") == 0)
 411                 settings->rgba = FC_RGBA_NONE;
 412               else if (strcmp (sval, "rgb") == 0)
 413                 settings->rgba = FC_RGBA_RGB;
 414               else if (strcmp (sval, "bgr") == 0)
 415                 settings->rgba = FC_RGBA_BGR;
 416               else if (strcmp (sval, "vrgb") == 0)
 417                 settings->rgba = FC_RGBA_VRGB;
 418               else if (strcmp (sval, "vbgr") == 0)
 419                 settings->rgba = FC_RGBA_VBGR;
 420               else
 421                 settings->seen &= ~SEEN_RGBA;
 422             }
 423           else if (strcmp (name, "Xft/DPI") == 0)
 424             {
 425               settings->seen |= SEEN_DPI;
 426               settings->dpi = (double)ival/1024.0;
 427             }
 428           else if (strcmp (name, "Xft/lcdfilter") == 0)
 429             {
 430               settings->seen |= SEEN_LCDFILTER;
 431               if (strcmp (sval, "none") == 0)
 432                 settings->lcdfilter = FC_LCD_NONE;
 433               else if (strcmp (sval, "lcddefault") == 0)
 434                 settings->lcdfilter = FC_LCD_DEFAULT;
 435               else
 436                 settings->seen &= ~SEEN_LCDFILTER;
 437             }
 438 #endif /* HAVE_XFT */
 439         }
 440     }
 441
 442   return settings_seen;
 443 }
 444
 445 static int
 446 read_settings (struct x_display_info *dpyinfo, struct xsettings *settings)
 447 {
 448   Atom act_type;
 449   int act_form;
 450   unsigned long nitems, bytes_after;
 451   unsigned char *prop = NULL;
 452   Display *dpy = dpyinfo->display;
 453   int rc;
 454
 455   x_catch_errors (dpy);
 456   rc = XGetWindowProperty (dpy,
 457                            dpyinfo->xsettings_window,
 458                            dpyinfo->Xatom_xsettings_prop,
 459                            0, LONG_MAX, False, AnyPropertyType,
 460                            &act_type, &act_form, &nitems, &bytes_after,
 461                            &prop);
 462
 463   if (rc == Success && prop != NULL && act_form == 8 && nitems > 0
 464       && act_type == dpyinfo->Xatom_xsettings_prop)
 465     rc = parse_settings (prop, nitems, settings);
 466
 467   XFree (prop);
 468
 469   x_uncatch_errors ();
 470
 471   return rc != 0;
 472 }
 473
 474
 475 static void
 476 apply_xft_settings (struct x_display_info *dpyinfo,
 477                     int send_event_p,
 478                     struct xsettings *settings)
 479 {
 480 #ifdef HAVE_XFT
 481   FcPattern *pat;
 482   struct xsettings oldsettings;
 483   int changed = 0;
 484
 485   memset (&oldsettings, 0, sizeof (oldsettings));
 486   pat = FcPatternCreate ();
 487   XftDefaultSubstitute (dpyinfo->display,
 488                         XScreenNumberOfScreen (dpyinfo->screen),
 489                         pat);
 490   FcPatternGetBool (pat, FC_ANTIALIAS, 0, &oldsettings.aa);
 491   FcPatternGetBool (pat, FC_HINTING, 0, &oldsettings.hinting);
 492 # ifdef FC_HINT_STYLE
 493   FcPatternGetInteger (pat, FC_HINT_STYLE, 0, &oldsettings.hintstyle);
 494 # endif
 495   FcPatternGetInteger (pat, FC_LCD_FILTER, 0, &oldsettings.lcdfilter);
 496   FcPatternGetInteger (pat, FC_RGBA, 0, &oldsettings.rgba);
 497   FcPatternGetDouble (pat, FC_DPI, 0, &oldsettings.dpi);
 498
 499   if ((settings->seen & SEEN_AA) != 0 && oldsettings.aa != settings->aa)
 500     {
 501       FcPatternDel (pat, FC_ANTIALIAS);
 502       FcPatternAddBool (pat, FC_ANTIALIAS, settings->aa);
 503       ++changed;
 504       oldsettings.aa = settings->aa;
 505     }
 506
 507   if ((settings->seen & SEEN_HINTING) != 0
 508       && oldsettings.hinting != settings->hinting)
 509     {
 510       FcPatternDel (pat, FC_HINTING);
 511       FcPatternAddBool (pat, FC_HINTING, settings->hinting);
 512       ++changed;
 513       oldsettings.hinting = settings->hinting;
 514     }
 515   if ((settings->seen & SEEN_RGBA) != 0 && oldsettings.rgba != settings->rgba)
 516     {
 517       FcPatternDel (pat, FC_RGBA);
 518       FcPatternAddInteger (pat, FC_RGBA, settings->rgba);
 519       oldsettings.rgba = settings->rgba;
 520       ++changed;
 521     }
 522
 523   /* Older fontconfig versions don't have FC_LCD_FILTER. */
 524   if ((settings->seen & SEEN_LCDFILTER) != 0
 525       && oldsettings.lcdfilter != settings->lcdfilter)
 526     {
 527       FcPatternDel (pat, FC_LCD_FILTER);
 528       FcPatternAddInteger (pat, FC_LCD_FILTER, settings->lcdfilter);
 529       ++changed;
 530       oldsettings.lcdfilter = settings->lcdfilter;
 531     }
 532
 533 # ifdef FC_HINT_STYLE
 534   if ((settings->seen & SEEN_HINTSTYLE) != 0
 535       && oldsettings.hintstyle != settings->hintstyle)
 536     {
 537       FcPatternDel (pat, FC_HINT_STYLE);
 538       FcPatternAddInteger (pat, FC_HINT_STYLE, settings->hintstyle);
 539       ++changed;
 540       oldsettings.hintstyle = settings->hintstyle;
 541     }
 542 # endif
 543
 544   if ((settings->seen & SEEN_DPI) != 0 && oldsettings.dpi != settings->dpi
 545       && settings->dpi > 0)
 546     {
 547       Lisp_Object frame, tail;
 548
 549       FcPatternDel (pat, FC_DPI);
 550       FcPatternAddDouble (pat, FC_DPI, settings->dpi);
 551       ++changed;
 552       oldsettings.dpi = settings->dpi;
 553
 554       /* Change the DPI on this display and all frames on the display.  */
 555       dpyinfo->resy = dpyinfo->resx = settings->dpi;
 556       FOR_EACH_FRAME (tail, frame)
 557         if (FRAME_X_P (XFRAME (frame))
 558             && FRAME_X_DISPLAY_INFO (XFRAME (frame)) == dpyinfo)
 559           XFRAME (frame)->resy = XFRAME (frame)->resx = settings->dpi;
 560     }
 561
 562   if (changed)
 563     {
 564       static char const format[] =
 565         "Antialias: %d, Hinting: %d, RGBA: %d, LCDFilter: %d, "
 566         "Hintstyle: %d, DPI: %lf";
 567       enum
 568       {
 569         d_formats = 5,
 570         d_growth = INT_BUFSIZE_BOUND (int) - sizeof "%d",
 571         lf_formats = 1,
 572         max_f_integer_digits = DBL_MAX_10_EXP + 1,
 573         f_precision = 6,
 574         lf_growth = (sizeof "-." + max_f_integer_digits + f_precision
 575                      - sizeof "%lf")
 576       };
 577       char buf[sizeof format + d_formats * d_growth + lf_formats * lf_growth];
 578
 579       XftDefaultSet (dpyinfo->display, pat);
 580       if (send_event_p)
 581         store_config_changed_event (Qfont_render,
 582                                     XCAR (dpyinfo->name_list_element));
 583       sprintf (buf, format, oldsettings.aa, oldsettings.hinting,
 584                oldsettings.rgba, oldsettings.lcdfilter,
 585                oldsettings.hintstyle, oldsettings.dpi);
 586       Vxft_settings = build_string (buf);
 587     }
 588   else
 589     FcPatternDestroy (pat);
 590 #endif /* HAVE_XFT */
 591 }
 592
 593 static void
 594 read_and_apply_settings (struct x_display_info *dpyinfo, int send_event_p)
 595 {
 596   struct xsettings settings;
 597   Lisp_Object dpyname = XCAR (dpyinfo->name_list_element);
 598
 599   if (!read_settings (dpyinfo, &settings))
 600     return;
 601
 602   apply_xft_settings (dpyinfo, True, &settings);
 603   if (settings.seen & SEEN_TB_STYLE)
 604     {
 605       Lisp_Object style = Qnil;
 606       if (strcmp (settings.tb_style, "both") == 0)
 607         style = Qboth;
 608       else if (strcmp (settings.tb_style, "both-horiz") == 0)
 609         style = Qboth_horiz;
 610       else if (strcmp (settings.tb_style, "icons") == 0)
 611         style = Qimage;
 612       else if (strcmp (settings.tb_style, "text") == 0)
 613         style = Qtext;
 614       if (!NILP (style) && !EQ (style, current_tool_bar_style))
 615         {
 616           current_tool_bar_style = style;
 617           if (send_event_p)
 618             store_config_changed_event (Qtool_bar_style, dpyname);
 619         }
 620       xfree (settings.tb_style);
 621     }
 622
 623   if (settings.seen & SEEN_FONT)
 624     {
 625       if (!current_font || strcmp (current_font, settings.font) != 0)
 626         {
 627           xfree (current_font);
 628           current_font = settings.font;
 629           if (send_event_p)
 630             store_config_changed_event (Qfont_name, dpyname);
 631         }
 632       else
 633         xfree (settings.font);
 634     }
 635 }
 636
 637 void
 638 xft_settings_event (struct x_display_info *dpyinfo, XEvent *event)
 639 {
 640   int check_window_p = 0;
 641   int apply_settings = 0;
 642
 643   switch (event->type)
 644     {
 645     case DestroyNotify:
 646       if (dpyinfo->xsettings_window == event->xany.window)
 647         check_window_p = 1;
 648       break;
 649
 650     case ClientMessage:
 651       if (event->xclient.message_type == dpyinfo->Xatom_xsettings_mgr
 652           && event->xclient.data.l[1] == dpyinfo->Xatom_xsettings_sel
 653           && event->xclient.window == dpyinfo->root_window)
 654         check_window_p = 1;
 655       break;
 656
 657     case PropertyNotify:
 658       if (event->xproperty.window == dpyinfo->xsettings_window
 659           && event->xproperty.state == PropertyNewValue
 660           && event->xproperty.atom == dpyinfo->Xatom_xsettings_prop)
 661         apply_settings = 1;
 662       break;
 663     }
 664
 665
 666   if (check_window_p)
 667     {
 668       dpyinfo->xsettings_window = None;
 669       get_prop_window (dpyinfo);
 670       if (dpyinfo->xsettings_window != None)
 671         apply_settings = 1;
 672     }
 673
 674   if (apply_settings)
 675     read_and_apply_settings (dpyinfo, True);
 676 }
 677
 678
 679 static void
 680 init_gsettings (void)
 681 {
 682 #ifdef HAVE_GSETTINGS
 683   GVariant *val;
 684   const gchar *const *schemas;
 685   int schema_found = 0;
 686
 687 #ifdef HAVE_G_TYPE_INIT
 688   g_type_init ();
 689 #endif
 690
 691   schemas = g_settings_list_schemas();
 692   if (schemas == NULL) return;
 693   while (! schema_found && *schemas != NULL)
 694     schema_found = strcmp (*schemas++, GSETTINGS_SCHEMA) == 0;
 695   if (!schema_found) return;
 696
 697   gsettings_client = g_settings_new (GSETTINGS_SCHEMA);
 698   if (!gsettings_client) return;
 699   g_object_ref_sink (G_OBJECT (gsettings_client));
 700
 701   val = g_settings_get_value (gsettings_client, SYSTEM_MONO_FONT);
 702   if (val)
 703     {
 704       g_variant_ref_sink (val);
 705       if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
 706         current_mono_font = xstrdup (g_variant_get_string (val, NULL));
 707       g_variant_unref (val);
 708     }
 709
 710   g_signal_connect (G_OBJECT (gsettings_client), "changed",
 711                     G_CALLBACK (something_changedCB), NULL);
 712 #endif /* HAVE_GSETTINGS */
 713 }
 714
 715
 716 static void
 717 init_gconf (void)
 718 {
 719 #if defined (HAVE_GCONF) && defined (HAVE_XFT) && ! defined (HAVE_GSETTINGS)
 720   char *s;
 721
 722 #ifdef HAVE_G_TYPE_INIT
 723   g_type_init ();
 724 #endif
 725   gconf_client = gconf_client_get_default ();
 726   s = gconf_client_get_string (gconf_client, SYSTEM_MONO_FONT, NULL);
 727   if (s)
 728     {
 729       current_mono_font = xstrdup (s);
 730       g_free (s);
 731     }
 732   s = gconf_client_get_string (gconf_client, SYSTEM_FONT, NULL);
 733   if (s)
 734     {
 735       current_font = xstrdup (s);
 736       g_free (s);
 737     }
 738   gconf_client_set_error_handling (gconf_client, GCONF_CLIENT_HANDLE_NONE);
 739   gconf_client_add_dir (gconf_client,
 740                         SYSTEM_MONO_FONT,
 741                         GCONF_CLIENT_PRELOAD_ONELEVEL,
 742                         NULL);
 743   gconf_client_notify_add (gconf_client,
 744                            SYSTEM_MONO_FONT,
 745                            something_changedCB,
 746                            NULL, NULL, NULL);
 747 #endif /* HAVE_GCONF && HAVE_XFT && ! HAVE_GSETTINGS */
 748 }
 749
 750 static void
 751 init_xsettings (struct x_display_info *dpyinfo)
 752 {
 753   Display *dpy = dpyinfo->display;
 754
 755   BLOCK_INPUT;
 756
 757   /* Select events so we can detect client messages sent when selection
 758      owner changes.  */
 759   XSelectInput (dpy, dpyinfo->root_window, StructureNotifyMask);
 760
 761   get_prop_window (dpyinfo);
 762   if (dpyinfo->xsettings_window != None)
 763     read_and_apply_settings (dpyinfo, False);
 764
 765   UNBLOCK_INPUT;
 766 }
 767
 768 void
 769 xsettings_initialize (struct x_display_info *dpyinfo)
 770 {
 771   if (first_dpyinfo == NULL) first_dpyinfo = dpyinfo;
 772   init_gsettings ();
 773   init_gconf ();
 774   init_xsettings (dpyinfo);
 775 }
 776
 777 const char *
 778 xsettings_get_system_font (void)
 779 {
 780   return current_mono_font;
 781 }
 782
 783 #ifdef USE_LUCID
 784 const char *
 785 xsettings_get_system_normal_font (void)
 786 {
 787   return current_font;
 788 }
 789 #endif
 790
 791 DEFUN ("font-get-system-normal-font", Ffont_get_system_normal_font,
 792        Sfont_get_system_normal_font,
 793        0, 0, 0,
 794        doc: /* Get the system default application font. */)
 795   (void)
 796 {
 797   return current_font ? build_string (current_font) : Qnil;
 798 }
 799
 800 DEFUN ("font-get-system-font", Ffont_get_system_font, Sfont_get_system_font,
 801        0, 0, 0,
 802        doc: /* Get the system default fixed width font. */)
 803   (void)
 804 {
 805   return current_mono_font ? build_string (current_mono_font) : Qnil;
 806 }
 807
 808 DEFUN ("tool-bar-get-system-style", Ftool_bar_get_system_style,
 809        Stool_bar_get_system_style, 0, 0, 0,
 810        doc: /* Get the system tool bar style.
 811 If no system tool bar style is known, return `tool-bar-style' if set to a
 812 known style.  Otherwise return image.  */)
 813   (void)
 814 {
 815   if (EQ (Vtool_bar_style, Qimage)
 816       || EQ (Vtool_bar_style, Qtext)
 817       || EQ (Vtool_bar_style, Qboth)
 818       || EQ (Vtool_bar_style, Qboth_horiz)
 819       || EQ (Vtool_bar_style, Qtext_image_horiz))
 820     return Vtool_bar_style;
 821   if (!NILP (current_tool_bar_style))
 822     return current_tool_bar_style;
 823   return Qimage;
 824 }
 825
 826 void
 827 syms_of_xsettings (void)
 828 {
 829   current_mono_font = NULL;
 830   current_font = NULL;
 831   first_dpyinfo = NULL;
 832 #ifdef HAVE_GSETTINGS
 833   gsettings_client = NULL;
 834 #else
 835 #ifdef HAVE_GCONF
 836   gconf_client = NULL;
 837 #endif
 838 #endif
 839
 840   DEFSYM (Qmonospace_font_name, "monospace-font-name");
 841   DEFSYM (Qfont_name, "font-name");
 842   DEFSYM (Qfont_render, "font-render");
 843   defsubr (&Sfont_get_system_font);
 844   defsubr (&Sfont_get_system_normal_font);
 845
 846   DEFVAR_BOOL ("font-use-system-font", use_system_font,
 847     doc: /* *Non-nil means to apply the system defined font dynamically.
 848 When this is non-nil and the system defined fixed width font changes, we
 849 update frames dynamically.
 850 If this variable is nil, Emacs ignores system font changes.  */);
 851   use_system_font = 0;
 852
 853   DEFVAR_LISP ("xft-settings", Vxft_settings,
 854                doc: /* Font settings applied to Xft.  */);
 855   Vxft_settings = make_string ("", 0);
 856
 857 #ifdef HAVE_XFT
 858   Fprovide (intern_c_string ("font-render-setting"), Qnil);
 859 #if defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
 860   Fprovide (intern_c_string ("system-font-setting"), Qnil);
 861 #endif
 862 #endif
 863
 864   current_tool_bar_style = Qnil;
 865   DEFSYM (Qtool_bar_style, "tool-bar-style");
 866   defsubr (&Stool_bar_get_system_style);
 867
 868   Fprovide (intern_c_string ("dynamic-setting"), Qnil);
 869 }