| 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 | } |