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Adjust NEWS entry for recent change
[emacs.git] / src / xsettings.c
blob066c6e795e91396a86acb7446a0da30097f11282
1 /* Functions for handling font and other changes dynamically.
2
3 Copyright (C) 2009-2012 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 #endif
41
42 #ifdef HAVE_GCONF
43 #include <gconf/gconf-client.h>
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 /* Store an config changed event in to the event queue. */
58
59 static void
60 store_config_changed_event (Lisp_Object arg, Lisp_Object display_name)
61 {
62 struct input_event event;
63 EVENT_INIT (event);
64 event.kind = CONFIG_CHANGED_EVENT;
65 event.frame_or_window = display_name;
66 event.arg = arg;
67 kbd_buffer_store_event (&event);
68 }
69
70 /* Return non-zero if DPYINFO is still valid. */
71 static int
72 dpyinfo_valid (struct x_display_info *dpyinfo)
73 {
74 int found = 0;
75 if (dpyinfo != NULL)
76 {
77 struct x_display_info *d;
78 for (d = x_display_list; !found && d; d = d->next)
79 found = d == dpyinfo && d->display == dpyinfo->display;
80 }
81 return found;
82 }
83
84 /* Store a monospace font change event if the monospaced font changed. */
85
86 #if defined HAVE_XFT && (defined HAVE_GSETTINGS || defined HAVE_GCONF)
87 static void
88 store_monospaced_changed (const char *newfont)
89 {
90 if (current_mono_font != NULL && strcmp (newfont, current_mono_font) == 0)
91 return; /* No change. */
92
93 xfree (current_mono_font);
94 current_mono_font = xstrdup (newfont);
95
96 if (dpyinfo_valid (first_dpyinfo) && use_system_font)
97 {
98 store_config_changed_event (Qmonospace_font_name,
99 XCAR (first_dpyinfo->name_list_element));
100 }
101 }
102 #endif
103
104 /* Store a font name change event if the font name changed. */
105
106 #ifdef HAVE_XFT
107 static void
108 store_font_name_changed (const char *newfont)
109 {
110 if (current_font != NULL && strcmp (newfont, current_font) == 0)
111 return; /* No change. */
112
113 xfree (current_font);
114 current_font = xstrdup (newfont);
115
116 if (dpyinfo_valid (first_dpyinfo))
117 {
118 store_config_changed_event (Qfont_name,
119 XCAR (first_dpyinfo->name_list_element));
120 }
121 }
122 #endif /* HAVE_XFT */
123
124 /* Map TOOL_BAR_STYLE from a string to its corresponding Lisp value.
125 Return Qnil if TOOL_BAR_STYLE is not known. */
126
127 static Lisp_Object
128 map_tool_bar_style (const char *tool_bar_style)
129 {
130 Lisp_Object style = Qnil;
131 if (tool_bar_style)
132 {
133 if (strcmp (tool_bar_style, "both") == 0)
134 style = Qboth;
135 else if (strcmp (tool_bar_style, "both-horiz") == 0)
136 style = Qboth_horiz;
137 else if (strcmp (tool_bar_style, "icons") == 0)
138 style = Qimage;
139 else if (strcmp (tool_bar_style, "text") == 0)
140 style = Qtext;
141 }
142
143 return style;
144 }
145
146 /* Store a tool bar style change event if the tool bar style changed. */
147
148 static void
149 store_tool_bar_style_changed (const char *newstyle,
150 struct x_display_info *dpyinfo)
151 {
152 Lisp_Object style = map_tool_bar_style (newstyle);
153 if (EQ (current_tool_bar_style, style))
154 return; /* No change. */
155
156 current_tool_bar_style = style;
157 if (dpyinfo_valid (dpyinfo))
158 store_config_changed_event (Qtool_bar_style,
159 XCAR (dpyinfo->name_list_element));
160 }
161
162
163 #define XSETTINGS_FONT_NAME "Gtk/FontName"
164 #define XSETTINGS_TOOL_BAR_STYLE "Gtk/ToolbarStyle"
165
166 enum {
167 SEEN_AA = 0x01,
168 SEEN_HINTING = 0x02,
169 SEEN_RGBA = 0x04,
170 SEEN_LCDFILTER = 0x08,
171 SEEN_HINTSTYLE = 0x10,
172 SEEN_DPI = 0x20,
173 SEEN_FONT = 0x40,
174 SEEN_TB_STYLE = 0x80,
175 };
176 struct xsettings
177 {
178 #ifdef HAVE_XFT
179 FcBool aa, hinting;
180 int rgba, lcdfilter, hintstyle;
181 double dpi;
182
183 char *font;
184 #endif
185
186 char *tb_style;
187
188 unsigned seen;
189 };
190
191 #ifdef HAVE_GSETTINGS
192 #define GSETTINGS_SCHEMA "org.gnome.desktop.interface"
193 #define GSETTINGS_TOOL_BAR_STYLE "toolbar-style"
194
195 #ifdef HAVE_XFT
196 #define GSETTINGS_MONO_FONT "monospace-font-name"
197 #define GSETTINGS_FONT_NAME "font-name"
198 #endif
199
200
201 /* The single GSettings instance, or NULL if not connected to GSettings. */
202
203 static GSettings *gsettings_client;
204
205 /* Callback called when something changed in GSettings. */
206
207 static void
208 something_changed_gsettingsCB (GSettings *settings,
209 gchar *key,
210 gpointer user_data)
211 {
212 GVariant *val;
213
214 if (strcmp (key, GSETTINGS_TOOL_BAR_STYLE) == 0)
215 {
216 val = g_settings_get_value (settings, GSETTINGS_TOOL_BAR_STYLE);
217 if (val)
218 {
219 g_variant_ref_sink (val);
220 if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
221 {
222 const gchar *newstyle = g_variant_get_string (val, NULL);
223 store_tool_bar_style_changed (newstyle, first_dpyinfo);
224 }
225 g_variant_unref (val);
226 }
227 }
228 #ifdef HAVE_XFT
229 else if (strcmp (key, GSETTINGS_MONO_FONT) == 0)
230 {
231 val = g_settings_get_value (settings, GSETTINGS_MONO_FONT);
232 if (val)
233 {
234 g_variant_ref_sink (val);
235 if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
236 {
237 const gchar *newfont = g_variant_get_string (val, NULL);
238 store_monospaced_changed (newfont);
239 }
240 g_variant_unref (val);
241 }
242 }
243 else if (strcmp (key, GSETTINGS_FONT_NAME) == 0)
244 {
245 val = g_settings_get_value (settings, GSETTINGS_FONT_NAME);
246 if (val)
247 {
248 g_variant_ref_sink (val);
249 if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
250 {
251 const gchar *newfont = g_variant_get_string (val, NULL);
252 store_font_name_changed (newfont);
253 }
254 g_variant_unref (val);
255 }
256 }
257 #endif /* HAVE_XFT */
258 }
259
260 #endif /* HAVE_GSETTINGS */
261
262 #ifdef HAVE_GCONF
263 #define GCONF_TOOL_BAR_STYLE "/desktop/gnome/interface/toolbar_style"
264 #ifdef HAVE_XFT
265 #define GCONF_MONO_FONT "/desktop/gnome/interface/monospace_font_name"
266 #define GCONF_FONT_NAME "/desktop/gnome/interface/font_name"
267 #endif
268
269 /* The single GConf instance, or NULL if not connected to GConf. */
270
271 static GConfClient *gconf_client;
272
273 /* Callback called when something changed in GConf that we care about. */
274
275 static void
276 something_changed_gconfCB (GConfClient *client,
277 guint cnxn_id,
278 GConfEntry *entry,
279 gpointer user_data)
280 {
281 GConfValue *v = gconf_entry_get_value (entry);
282 const char *key = gconf_entry_get_key (entry);
283
284 if (!v || v->type != GCONF_VALUE_STRING || ! key) return;
285 if (strcmp (key, GCONF_TOOL_BAR_STYLE) == 0)
286 {
287 const char *value = gconf_value_get_string (v);
288 store_tool_bar_style_changed (value, first_dpyinfo);
289 }
290 #ifdef HAVE_XFT
291 else if (strcmp (key, GCONF_MONO_FONT) == 0)
292 {
293 const char *value = gconf_value_get_string (v);
294 store_monospaced_changed (value);
295 }
296 else if (strcmp (key, GCONF_FONT_NAME) == 0)
297 {
298 const char *value = gconf_value_get_string (v);
299 store_font_name_changed (value);
300 }
301 #endif /* HAVE_XFT */
302 }
303
304 #endif /* HAVE_GCONF */
305
306 #ifdef HAVE_XFT
307
308 /* Older fontconfig versions don't have FC_LCD_*. */
309 #ifndef FC_LCD_NONE
310 #define FC_LCD_NONE 0
311 #endif
312 #ifndef FC_LCD_DEFAULT
313 #define FC_LCD_DEFAULT 1
314 #endif
315 #ifndef FC_LCD_FILTER
316 #define FC_LCD_FILTER "lcdfilter"
317 #endif
318
319 #endif /* HAVE_XFT */
320
321 /* Find the window that contains the XSETTINGS property values. */
322
323 static void
324 get_prop_window (struct x_display_info *dpyinfo)
325 {
326 Display *dpy = dpyinfo->display;
327
328 XGrabServer (dpy);
329 dpyinfo->xsettings_window = XGetSelectionOwner (dpy,
330 dpyinfo->Xatom_xsettings_sel);
331 if (dpyinfo->xsettings_window != None)
332 /* Select events so we can detect if window is deleted or if settings
333 are changed. */
334 XSelectInput (dpy, dpyinfo->xsettings_window,
335 PropertyChangeMask|StructureNotifyMask);
336
337 XUngrabServer (dpy);
338 }
339
340 #define SWAP32(nr) (((nr) << 24) | (((nr) << 8) & 0xff0000) \
341 | (((nr) >> 8) & 0xff00) | ((nr) >> 24))
342 #define SWAP16(nr) (((nr) << 8) | ((nr) >> 8))
343 #define PAD(nr) (((nr) + 3) & ~3)
344
345 /* Parse xsettings and extract those that deal with Xft.
346 See http://freedesktop.org/wiki/Specifications/XSettingsRegistry
347 and http://standards.freedesktop.org/xsettings-spec/xsettings-spec-0.5.html.
348
349 Layout of prop. First is a header:
350
351 bytes type what
352 ------------------------------------
353 1 CARD8 byte-order
354 3 unused
355 4 CARD32 SERIAL
356 4 CARD32 N_SETTINGS
357
358 Then N_SETTINGS records, with header:
359
360 bytes type what
361 ------------------------------------
362 1 SETTING_TYPE type (0 = integer, 1 = string, 2 RGB color).
363 1 unused
364 2 CARD16 n == name-length
365 n STRING8 name
366 p unused, p=pad_to_even_4(n)
367 4 CARD32 last-change-serial
368
369 and then the value, For string:
370
371 bytes type what
372 ------------------------------------
373 4 CARD32 n = value-length
374 n STRING8 value
375 p unused, p=pad_to_even_4(n)
376
377 For integer:
378
379 bytes type what
380 ------------------------------------
381 4 INT32 value
382
383 For RGB color:
384
385 bytes type what
386 ------------------------------------
387 2 CARD16 red
388 2 CARD16 blue
389 2 CARD16 green
390 2 CARD16 alpha
391
392 Returns non-zero if some Xft settings was seen, zero otherwise.
393 */
394
395 static int
396 parse_settings (unsigned char *prop,
397 long unsigned int bytes,
398 struct xsettings *settings)
399 {
400 Lisp_Object byteorder = Fbyteorder ();
401 int my_bo = XFASTINT (byteorder) == 'B' ? MSBFirst : LSBFirst;
402 int that_bo = prop[0];
403 CARD32 n_settings;
404 int bytes_parsed = 0;
405 int settings_seen = 0;
406 int i = 0;
407
408 /* First 4 bytes is a serial number, skip that. */
409
410 if (bytes < 12) return BadLength;
411 memcpy (&n_settings, prop+8, 4);
412 if (my_bo != that_bo) n_settings = SWAP32 (n_settings);
413 bytes_parsed = 12;
414
415 memset (settings, 0, sizeof (*settings));
416
417 while (bytes_parsed+4 < bytes && settings_seen < 7
418 && i < n_settings)
419 {
420 int type = prop[bytes_parsed++];
421 CARD16 nlen;
422 CARD32 vlen, ival = 0;
423 char name[128]; /* The names we are looking for are not this long. */
424 char sval[128]; /* The values we are looking for are not this long. */
425 int want_this;
426 int to_cpy;
427
428 sval[0] = '\0';
429 ++i;
430 ++bytes_parsed; /* Padding */
431
432 memcpy (&nlen, prop+bytes_parsed, 2);
433 bytes_parsed += 2;
434 if (my_bo != that_bo) nlen = SWAP16 (nlen);
435 if (bytes_parsed+nlen > bytes) return BadLength;
436 to_cpy = nlen > 127 ? 127 : nlen;
437 memcpy (name, prop+bytes_parsed, to_cpy);
438 name[to_cpy] = '\0';
439
440 bytes_parsed += nlen;
441 bytes_parsed = PAD (bytes_parsed);
442
443 bytes_parsed += 4; /* Skip serial for this value */
444 if (bytes_parsed > bytes) return BadLength;
445
446 want_this =
447 #ifdef HAVE_XFT
448 (nlen > 6 && strncmp (name, "Xft/", 4) == 0)
449 || strcmp (XSETTINGS_FONT_NAME, name) == 0
450 ||
451 #endif
452 strcmp (XSETTINGS_TOOL_BAR_STYLE, name) == 0;
453
454 switch (type)
455 {
456 case 0: /* Integer */
457 if (bytes_parsed+4 > bytes) return BadLength;
458 if (want_this)
459 {
460 memcpy (&ival, prop+bytes_parsed, 4);
461 if (my_bo != that_bo) ival = SWAP32 (ival);
462 }
463 bytes_parsed += 4;
464 break;
465
466 case 1: /* String */
467 if (bytes_parsed+4 > bytes) return BadLength;
468 memcpy (&vlen, prop+bytes_parsed, 4);
469 bytes_parsed += 4;
470 if (my_bo != that_bo) vlen = SWAP32 (vlen);
471 if (want_this)
472 {
473 to_cpy = vlen > 127 ? 127 : vlen;
474 memcpy (sval, prop+bytes_parsed, to_cpy);
475 sval[to_cpy] = '\0';
476 }
477 bytes_parsed += vlen;
478 bytes_parsed = PAD (bytes_parsed);
479 break;
480
481 case 2: /* RGB value */
482 /* No need to parse this */
483 if (bytes_parsed+8 > bytes) return BadLength;
484 bytes_parsed += 8; /* 4 values (r, b, g, alpha), 2 bytes each. */
485 break;
486
487 default: /* Parse Error */
488 return BadValue;
489 }
490
491 if (want_this)
492 {
493 ++settings_seen;
494 if (strcmp (name, XSETTINGS_TOOL_BAR_STYLE) == 0)
495 {
496 settings->tb_style = xstrdup (sval);
497 settings->seen |= SEEN_TB_STYLE;
498 }
499 #ifdef HAVE_XFT
500 else if (strcmp (name, XSETTINGS_FONT_NAME) == 0)
501 {
502 settings->font = xstrdup (sval);
503 settings->seen |= SEEN_FONT;
504 }
505 else if (strcmp (name, "Xft/Antialias") == 0)
506 {
507 settings->seen |= SEEN_AA;
508 settings->aa = ival != 0;
509 }
510 else if (strcmp (name, "Xft/Hinting") == 0)
511 {
512 settings->seen |= SEEN_HINTING;
513 settings->hinting = ival != 0;
514 }
515 # ifdef FC_HINT_STYLE
516 else if (strcmp (name, "Xft/HintStyle") == 0)
517 {
518 settings->seen |= SEEN_HINTSTYLE;
519 if (strcmp (sval, "hintnone") == 0)
520 settings->hintstyle = FC_HINT_NONE;
521 else if (strcmp (sval, "hintslight") == 0)
522 settings->hintstyle = FC_HINT_SLIGHT;
523 else if (strcmp (sval, "hintmedium") == 0)
524 settings->hintstyle = FC_HINT_MEDIUM;
525 else if (strcmp (sval, "hintfull") == 0)
526 settings->hintstyle = FC_HINT_FULL;
527 else
528 settings->seen &= ~SEEN_HINTSTYLE;
529 }
530 # endif
531 else if (strcmp (name, "Xft/RGBA") == 0)
532 {
533 settings->seen |= SEEN_RGBA;
534 if (strcmp (sval, "none") == 0)
535 settings->rgba = FC_RGBA_NONE;
536 else if (strcmp (sval, "rgb") == 0)
537 settings->rgba = FC_RGBA_RGB;
538 else if (strcmp (sval, "bgr") == 0)
539 settings->rgba = FC_RGBA_BGR;
540 else if (strcmp (sval, "vrgb") == 0)
541 settings->rgba = FC_RGBA_VRGB;
542 else if (strcmp (sval, "vbgr") == 0)
543 settings->rgba = FC_RGBA_VBGR;
544 else
545 settings->seen &= ~SEEN_RGBA;
546 }
547 else if (strcmp (name, "Xft/DPI") == 0)
548 {
549 settings->seen |= SEEN_DPI;
550 settings->dpi = (double)ival/1024.0;
551 }
552 else if (strcmp (name, "Xft/lcdfilter") == 0)
553 {
554 settings->seen |= SEEN_LCDFILTER;
555 if (strcmp (sval, "none") == 0)
556 settings->lcdfilter = FC_LCD_NONE;
557 else if (strcmp (sval, "lcddefault") == 0)
558 settings->lcdfilter = FC_LCD_DEFAULT;
559 else
560 settings->seen &= ~SEEN_LCDFILTER;
561 }
562 #endif /* HAVE_XFT */
563 }
564 }
565
566 return settings_seen;
567 }
568
569 /* Read settings from the XSettings property window on display for DPYINFO.
570 Store settings read in SETTINGS.
571 Return non-zero if successful, zero if not. */
572
573 static int
574 read_settings (struct x_display_info *dpyinfo, struct xsettings *settings)
575 {
576 Atom act_type;
577 int act_form;
578 unsigned long nitems, bytes_after;
579 unsigned char *prop = NULL;
580 Display *dpy = dpyinfo->display;
581 int rc;
582
583 x_catch_errors (dpy);
584 rc = XGetWindowProperty (dpy,
585 dpyinfo->xsettings_window,
586 dpyinfo->Xatom_xsettings_prop,
587 0, LONG_MAX, False, AnyPropertyType,
588 &act_type, &act_form, &nitems, &bytes_after,
589 &prop);
590
591 if (rc == Success && prop != NULL && act_form == 8 && nitems > 0
592 && act_type == dpyinfo->Xatom_xsettings_prop)
593 rc = parse_settings (prop, nitems, settings);
594
595 XFree (prop);
596
597 x_uncatch_errors ();
598
599 return rc != 0;
600 }
601
602 /* Apply Xft settings in SETTINGS to the Xft library.
603 If SEND_EVENT_P is non-zero store a Lisp event that Xft settings changed. */
604
605 static void
606 apply_xft_settings (struct x_display_info *dpyinfo,
607 int send_event_p,
608 struct xsettings *settings)
609 {
610 #ifdef HAVE_XFT
611 FcPattern *pat;
612 struct xsettings oldsettings;
613 int changed = 0;
614
615 memset (&oldsettings, 0, sizeof (oldsettings));
616 pat = FcPatternCreate ();
617 XftDefaultSubstitute (dpyinfo->display,
618 XScreenNumberOfScreen (dpyinfo->screen),
619 pat);
620 FcPatternGetBool (pat, FC_ANTIALIAS, 0, &oldsettings.aa);
621 FcPatternGetBool (pat, FC_HINTING, 0, &oldsettings.hinting);
622 #ifdef FC_HINT_STYLE
623 FcPatternGetInteger (pat, FC_HINT_STYLE, 0, &oldsettings.hintstyle);
624 #endif
625 FcPatternGetInteger (pat, FC_LCD_FILTER, 0, &oldsettings.lcdfilter);
626 FcPatternGetInteger (pat, FC_RGBA, 0, &oldsettings.rgba);
627 FcPatternGetDouble (pat, FC_DPI, 0, &oldsettings.dpi);
628
629 if ((settings->seen & SEEN_AA) != 0 && oldsettings.aa != settings->aa)
630 {
631 FcPatternDel (pat, FC_ANTIALIAS);
632 FcPatternAddBool (pat, FC_ANTIALIAS, settings->aa);
633 ++changed;
634 oldsettings.aa = settings->aa;
635 }
636
637 if ((settings->seen & SEEN_HINTING) != 0
638 && oldsettings.hinting != settings->hinting)
639 {
640 FcPatternDel (pat, FC_HINTING);
641 FcPatternAddBool (pat, FC_HINTING, settings->hinting);
642 ++changed;
643 oldsettings.hinting = settings->hinting;
644 }
645 if ((settings->seen & SEEN_RGBA) != 0 && oldsettings.rgba != settings->rgba)
646 {
647 FcPatternDel (pat, FC_RGBA);
648 FcPatternAddInteger (pat, FC_RGBA, settings->rgba);
649 oldsettings.rgba = settings->rgba;
650 ++changed;
651 }
652
653 /* Older fontconfig versions don't have FC_LCD_FILTER. */
654 if ((settings->seen & SEEN_LCDFILTER) != 0
655 && oldsettings.lcdfilter != settings->lcdfilter)
656 {
657 FcPatternDel (pat, FC_LCD_FILTER);
658 FcPatternAddInteger (pat, FC_LCD_FILTER, settings->lcdfilter);
659 ++changed;
660 oldsettings.lcdfilter = settings->lcdfilter;
661 }
662
663 #ifdef FC_HINT_STYLE
664 if ((settings->seen & SEEN_HINTSTYLE) != 0
665 && oldsettings.hintstyle != settings->hintstyle)
666 {
667 FcPatternDel (pat, FC_HINT_STYLE);
668 FcPatternAddInteger (pat, FC_HINT_STYLE, settings->hintstyle);
669 ++changed;
670 oldsettings.hintstyle = settings->hintstyle;
671 }
672 #endif
673
674 if ((settings->seen & SEEN_DPI) != 0 && oldsettings.dpi != settings->dpi
675 && settings->dpi > 0)
676 {
677 Lisp_Object frame, tail;
678
679 FcPatternDel (pat, FC_DPI);
680 FcPatternAddDouble (pat, FC_DPI, settings->dpi);
681 ++changed;
682 oldsettings.dpi = settings->dpi;
683
684 /* Change the DPI on this display and all frames on the display. */
685 dpyinfo->resy = dpyinfo->resx = settings->dpi;
686 FOR_EACH_FRAME (tail, frame)
687 if (FRAME_X_P (XFRAME (frame))
688 && FRAME_X_DISPLAY_INFO (XFRAME (frame)) == dpyinfo)
689 XFRAME (frame)->resy = XFRAME (frame)->resx = settings->dpi;
690 }
691
692 if (changed)
693 {
694 static char const format[] =
695 "Antialias: %d, Hinting: %d, RGBA: %d, LCDFilter: %d, "
696 "Hintstyle: %d, DPI: %lf";
697 enum
698 {
699 d_formats = 5,
700 d_growth = INT_BUFSIZE_BOUND (int) - sizeof "%d",
701 lf_formats = 1,
702 max_f_integer_digits = DBL_MAX_10_EXP + 1,
703 f_precision = 6,
704 lf_growth = (sizeof "-." + max_f_integer_digits + f_precision
705 - sizeof "%lf")
706 };
707 char buf[sizeof format + d_formats * d_growth + lf_formats * lf_growth];
708
709 XftDefaultSet (dpyinfo->display, pat);
710 if (send_event_p)
711 store_config_changed_event (Qfont_render,
712 XCAR (dpyinfo->name_list_element));
713 sprintf (buf, format, oldsettings.aa, oldsettings.hinting,
714 oldsettings.rgba, oldsettings.lcdfilter,
715 oldsettings.hintstyle, oldsettings.dpi);
716 Vxft_settings = build_string (buf);
717 }
718 else
719 FcPatternDestroy (pat);
720 #endif /* HAVE_XFT */
721 }
722
723 /* Read XSettings from the display for DPYINFO.
724 If SEND_EVENT_P is non-zero store a Lisp event settings that changed. */
725
726 static void
727 read_and_apply_settings (struct x_display_info *dpyinfo, int send_event_p)
728 {
729 struct xsettings settings;
730
731 if (!read_settings (dpyinfo, &settings))
732 return;
733
734 apply_xft_settings (dpyinfo, True, &settings);
735 if (settings.seen & SEEN_TB_STYLE)
736 {
737 if (send_event_p)
738 store_tool_bar_style_changed (settings.tb_style, dpyinfo);
739 else
740 current_tool_bar_style = map_tool_bar_style (settings.tb_style);
741 xfree (settings.tb_style);
742 }
743 #ifdef HAVE_XFT
744 if (settings.seen & SEEN_FONT)
745 {
746 if (send_event_p)
747 store_font_name_changed (settings.font);
748 else
749 {
750 xfree (current_font);
751 current_font = xstrdup (settings.font);
752 }
753 xfree (settings.font);
754 }
755 #endif
756 }
757
758 /* Check if EVENT for the display in DPYINFO is XSettings related. */
759
760 void
761 xft_settings_event (struct x_display_info *dpyinfo, XEvent *event)
762 {
763 int check_window_p = 0;
764 int apply_settings = 0;
765
766 switch (event->type)
767 {
768 case DestroyNotify:
769 if (dpyinfo->xsettings_window == event->xany.window)
770 check_window_p = 1;
771 break;
772
773 case ClientMessage:
774 if (event->xclient.message_type == dpyinfo->Xatom_xsettings_mgr
775 && event->xclient.data.l[1] == dpyinfo->Xatom_xsettings_sel
776 && event->xclient.window == dpyinfo->root_window)
777 check_window_p = 1;
778 break;
779
780 case PropertyNotify:
781 if (event->xproperty.window == dpyinfo->xsettings_window
782 && event->xproperty.state == PropertyNewValue
783 && event->xproperty.atom == dpyinfo->Xatom_xsettings_prop)
784 apply_settings = 1;
785 break;
786 }
787
788
789 if (check_window_p)
790 {
791 dpyinfo->xsettings_window = None;
792 get_prop_window (dpyinfo);
793 if (dpyinfo->xsettings_window != None)
794 apply_settings = 1;
795 }
796
797 if (apply_settings)
798 read_and_apply_settings (dpyinfo, True);
799 }
800
801 /* Initialize GSettings and read startup values. */
802
803 static void
804 init_gsettings (void)
805 {
806 #ifdef HAVE_GSETTINGS
807 GVariant *val;
808 const gchar *const *schemas;
809 int schema_found = 0;
810
811 #ifdef HAVE_G_TYPE_INIT
812 g_type_init ();
813 #endif
814
815 schemas = g_settings_list_schemas ();
816 if (schemas == NULL) return;
817 while (! schema_found && *schemas != NULL)
818 schema_found = strcmp (*schemas++, GSETTINGS_SCHEMA) == 0;
819 if (!schema_found) return;
820
821 gsettings_client = g_settings_new (GSETTINGS_SCHEMA);
822 if (!gsettings_client) return;
823 g_object_ref_sink (G_OBJECT (gsettings_client));
824 g_signal_connect (G_OBJECT (gsettings_client), "changed",
825 G_CALLBACK (something_changed_gsettingsCB), NULL);
826
827 val = g_settings_get_value (gsettings_client, GSETTINGS_TOOL_BAR_STYLE);
828 if (val)
829 {
830 g_variant_ref_sink (val);
831 if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
832 current_tool_bar_style
833 = map_tool_bar_style (g_variant_get_string (val, NULL));
834 g_variant_unref (val);
835 }
836
837 #ifdef HAVE_XFT
838 val = g_settings_get_value (gsettings_client, GSETTINGS_MONO_FONT);
839 if (val)
840 {
841 g_variant_ref_sink (val);
842 if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
843 current_mono_font = xstrdup (g_variant_get_string (val, NULL));
844 g_variant_unref (val);
845 }
846
847 val = g_settings_get_value (gsettings_client, GSETTINGS_FONT_NAME);
848 if (val)
849 {
850 g_variant_ref_sink (val);
851 if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
852 current_font = xstrdup (g_variant_get_string (val, NULL));
853 g_variant_unref (val);
854 }
855 #endif /* HAVE_XFT */
856
857 #endif /* HAVE_GSETTINGS */
858 }
859
860 /* Init GConf and read startup values. */
861
862 static void
863 init_gconf (void)
864 {
865 #if defined (HAVE_GCONF)
866 char *s;
867
868 #ifdef HAVE_G_TYPE_INIT
869 g_type_init ();
870 #endif
871
872 gconf_client = gconf_client_get_default ();
873 gconf_client_set_error_handling (gconf_client, GCONF_CLIENT_HANDLE_NONE);
874 gconf_client_add_dir (gconf_client,
875 GCONF_TOOL_BAR_STYLE,
876 GCONF_CLIENT_PRELOAD_ONELEVEL,
877 NULL);
878 gconf_client_notify_add (gconf_client,
879 GCONF_TOOL_BAR_STYLE,
880 something_changed_gconfCB,
881 NULL, NULL, NULL);
882
883 s = gconf_client_get_string (gconf_client, GCONF_TOOL_BAR_STYLE, NULL);
884 if (s)
885 {
886 current_tool_bar_style = map_tool_bar_style (s);
887 g_free (s);
888 }
889
890 #ifdef HAVE_XFT
891 s = gconf_client_get_string (gconf_client, GCONF_MONO_FONT, NULL);
892 if (s)
893 {
894 current_mono_font = xstrdup (s);
895 g_free (s);
896 }
897 s = gconf_client_get_string (gconf_client, GCONF_FONT_NAME, NULL);
898 if (s)
899 {
900 current_font = xstrdup (s);
901 g_free (s);
902 }
903 gconf_client_add_dir (gconf_client,
904 GCONF_MONO_FONT,
905 GCONF_CLIENT_PRELOAD_ONELEVEL,
906 NULL);
907 gconf_client_notify_add (gconf_client,
908 GCONF_MONO_FONT,
909 something_changed_gconfCB,
910 NULL, NULL, NULL);
911 gconf_client_add_dir (gconf_client,
912 GCONF_FONT_NAME,
913 GCONF_CLIENT_PRELOAD_ONELEVEL,
914 NULL);
915 gconf_client_notify_add (gconf_client,
916 GCONF_FONT_NAME,
917 something_changed_gconfCB,
918 NULL, NULL, NULL);
919 #endif /* HAVE_XFT */
920 #endif /* HAVE_GCONF */
921 }
922
923 /* Init Xsettings and read startup values. */
924
925 static void
926 init_xsettings (struct x_display_info *dpyinfo)
927 {
928 Display *dpy = dpyinfo->display;
929
930 BLOCK_INPUT;
931
932 /* Select events so we can detect client messages sent when selection
933 owner changes. */
934 XSelectInput (dpy, dpyinfo->root_window, StructureNotifyMask);
935
936 get_prop_window (dpyinfo);
937 if (dpyinfo->xsettings_window != None)
938 read_and_apply_settings (dpyinfo, False);
939
940 UNBLOCK_INPUT;
941 }
942
943 void
944 xsettings_initialize (struct x_display_info *dpyinfo)
945 {
946 if (first_dpyinfo == NULL) first_dpyinfo = dpyinfo;
947 init_gconf ();
948 init_xsettings (dpyinfo);
949 init_gsettings ();
950 }
951
952 /* Return the system monospaced font.
953 May be NULL if not known. */
954
955 const char *
956 xsettings_get_system_font (void)
957 {
958 return current_mono_font;
959 }
960
961 #ifdef USE_LUCID
962 /* Return the system font.
963 May be NULL if not known. */
964
965 const char *
966 xsettings_get_system_normal_font (void)
967 {
968 return current_font;
969 }
970 #endif
971
972 DEFUN ("font-get-system-normal-font", Ffont_get_system_normal_font,
973 Sfont_get_system_normal_font,
974 0, 0, 0,
975 doc: /* Get the system default application font. */)
976 (void)
977 {
978 return current_font ? build_string (current_font) : Qnil;
979 }
980
981 DEFUN ("font-get-system-font", Ffont_get_system_font, Sfont_get_system_font,
982 0, 0, 0,
983 doc: /* Get the system default fixed width font. */)
984 (void)
985 {
986 return current_mono_font ? build_string (current_mono_font) : Qnil;
987 }
988
989 DEFUN ("tool-bar-get-system-style", Ftool_bar_get_system_style,
990 Stool_bar_get_system_style, 0, 0, 0,
991 doc: /* Get the system tool bar style.
992 If no system tool bar style is known, return `tool-bar-style' if set to a
993 known style. Otherwise return image. */)
994 (void)
995 {
996 if (EQ (Vtool_bar_style, Qimage)
997 || EQ (Vtool_bar_style, Qtext)
998 || EQ (Vtool_bar_style, Qboth)
999 || EQ (Vtool_bar_style, Qboth_horiz)
1000 || EQ (Vtool_bar_style, Qtext_image_horiz))
1001 return Vtool_bar_style;
1002 if (!NILP (current_tool_bar_style))
1003 return current_tool_bar_style;
1004 return Qimage;
1005 }
1006
1007 void
1008 syms_of_xsettings (void)
1009 {
1010 current_mono_font = NULL;
1011 current_font = NULL;
1012 first_dpyinfo = NULL;
1013 #ifdef HAVE_GSETTINGS
1014 gsettings_client = NULL;
1015 #endif
1016 #ifdef HAVE_GCONF
1017 gconf_client = NULL;
1018 #endif
1019
1020 DEFSYM (Qmonospace_font_name, "monospace-font-name");
1021 DEFSYM (Qfont_name, "font-name");
1022 DEFSYM (Qfont_render, "font-render");
1023 defsubr (&Sfont_get_system_font);
1024 defsubr (&Sfont_get_system_normal_font);
1025
1026 DEFVAR_BOOL ("font-use-system-font", use_system_font,
1027 doc: /* *Non-nil means to apply the system defined font dynamically.
1028 When this is non-nil and the system defined fixed width font changes, we
1029 update frames dynamically.
1030 If this variable is nil, Emacs ignores system font changes. */);
1031 use_system_font = 0;
1032
1033 DEFVAR_LISP ("xft-settings", Vxft_settings,
1034 doc: /* Font settings applied to Xft. */);
1035 Vxft_settings = make_string ("", 0);
1036
1037 #ifdef HAVE_XFT
1038 Fprovide (intern_c_string ("font-render-setting"), Qnil);
1039 #if defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
1040 Fprovide (intern_c_string ("system-font-setting"), Qnil);
1041 #endif
1042 #endif
1043
1044 current_tool_bar_style = Qnil;
1045 DEFSYM (Qtool_bar_style, "tool-bar-style");
1046 defsubr (&Stool_bar_get_system_style);
1047
1048 Fprovide (intern_c_string ("dynamic-setting"), Qnil);
1049 }
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