/* Functions for handling font and other changes dynamically. Copyright (C) 2009-2011 Free Software Foundation, Inc. This file is part of GNU Emacs. GNU Emacs is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. GNU Emacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Emacs. If not, see . */ #include #include #include #include #include "lisp.h" #include "xterm.h" #include "xsettings.h" #include "frame.h" #include "keyboard.h" #include "blockinput.h" #include "termhooks.h" #include "termopts.h" #include #ifdef HAVE_GCONF #include #endif #ifdef HAVE_XFT #include #endif static char *current_mono_font; static char *current_font; static struct x_display_info *first_dpyinfo; static Lisp_Object Qmonospace_font_name, Qfont_name, Qfont_render, Qtool_bar_style; static Lisp_Object current_tool_bar_style; #ifdef HAVE_GCONF static GConfClient *gconf_client; #endif static void store_config_changed_event (Lisp_Object arg, Lisp_Object display_name) { struct input_event event; EVENT_INIT (event); event.kind = CONFIG_CHANGED_EVENT; event.frame_or_window = display_name; event.arg = arg; kbd_buffer_store_event (&event); } #define XSETTINGS_FONT_NAME "Gtk/FontName" #define XSETTINGS_TOOL_BAR_STYLE "Gtk/ToolbarStyle" enum { SEEN_AA = 0x01, SEEN_HINTING = 0x02, SEEN_RGBA = 0x04, SEEN_LCDFILTER = 0x08, SEEN_HINTSTYLE = 0x10, SEEN_DPI = 0x20, SEEN_FONT = 0x40, SEEN_TB_STYLE = 0x80, }; struct xsettings { #ifdef HAVE_XFT FcBool aa, hinting; int rgba, lcdfilter, hintstyle; double dpi; #endif char *font; char *tb_style; unsigned seen; }; #ifdef HAVE_GCONF #define SYSTEM_MONO_FONT "/desktop/gnome/interface/monospace_font_name" #define SYSTEM_FONT "/desktop/gnome/interface/font_name" /* Callback called when something changed in GConf that we care about, that is SYSTEM_MONO_FONT. */ static void something_changedCB (GConfClient *client, guint cnxn_id, GConfEntry *entry, gpointer user_data) { GConfValue *v = gconf_entry_get_value (entry); if (!v) return; if (v->type == GCONF_VALUE_STRING) { const char *value = gconf_value_get_string (v); if (current_mono_font != NULL && strcmp (value, current_mono_font) == 0) return; /* No change. */ xfree (current_mono_font); current_mono_font = xstrdup (value); } if (first_dpyinfo != NULL) { /* Check if display still open */ struct x_display_info *dpyinfo; int found = 0; for (dpyinfo = x_display_list; !found && dpyinfo; dpyinfo = dpyinfo->next) found = dpyinfo == first_dpyinfo; if (found && use_system_font) store_config_changed_event (Qmonospace_font_name, XCAR (first_dpyinfo->name_list_element)); } } #endif /* HAVE_GCONF */ #ifdef HAVE_XFT /* Older fontconfig versions don't have FC_LCD_*. */ #ifndef FC_LCD_NONE #define FC_LCD_NONE 0 #endif #ifndef FC_LCD_DEFAULT #define FC_LCD_DEFAULT 1 #endif #ifndef FC_LCD_FILTER #define FC_LCD_FILTER "lcdfilter" #endif #endif /* HAVE_XFT */ /* Find the window that contains the XSETTINGS property values. */ static void get_prop_window (struct x_display_info *dpyinfo) { Display *dpy = dpyinfo->display; XGrabServer (dpy); dpyinfo->xsettings_window = XGetSelectionOwner (dpy, dpyinfo->Xatom_xsettings_sel); if (dpyinfo->xsettings_window != None) /* Select events so we can detect if window is deleted or if settings are changed. */ XSelectInput (dpy, dpyinfo->xsettings_window, PropertyChangeMask|StructureNotifyMask); XUngrabServer (dpy); } #define SWAP32(nr) (((nr) << 24) | (((nr) << 8) & 0xff0000) \ | (((nr) >> 8) & 0xff00) | ((nr) >> 24)) #define SWAP16(nr) (((nr) << 8) | ((nr) >> 8)) #define PAD(nr) (((nr) + 3) & ~3) /* Parse xsettings and extract those that deal with Xft. See http://freedesktop.org/wiki/Specifications/XSettingsRegistry and http://standards.freedesktop.org/xsettings-spec/xsettings-spec-0.5.html. Layout of prop. First is a header: bytes type what ------------------------------------ 1 CARD8 byte-order 3 unused 4 CARD32 SERIAL 4 CARD32 N_SETTINGS Then N_SETTINGS records, with header: bytes type what ------------------------------------ 1 SETTING_TYPE type (0 = integer, 1 = string, 2 RGB color). 1 unused 2 CARD16 n == name-length n STRING8 name p unused, p=pad_to_even_4(n) 4 CARD32 last-change-serial and then the value, For string: bytes type what ------------------------------------ 4 CARD32 n = value-length n STRING8 value p unused, p=pad_to_even_4(n) For integer: bytes type what ------------------------------------ 4 INT32 value For RGB color: bytes type what ------------------------------------ 2 CARD16 red 2 CARD16 blue 2 CARD16 green 2 CARD16 alpha Returns non-zero if some Xft settings was seen, zero otherwise. */ static int parse_settings (unsigned char *prop, long unsigned int bytes, struct xsettings *settings) { Lisp_Object byteorder = Fbyteorder (); int my_bo = XFASTINT (byteorder) == 'B' ? MSBFirst : LSBFirst; int that_bo = prop[0]; CARD32 n_settings; int bytes_parsed = 0; int settings_seen = 0; int i = 0; /* First 4 bytes is a serial number, skip that. */ if (bytes < 12) return BadLength; memcpy (&n_settings, prop+8, 4); if (my_bo != that_bo) n_settings = SWAP32 (n_settings); bytes_parsed = 12; memset (settings, 0, sizeof (*settings)); while (bytes_parsed+4 < bytes && settings_seen < 7 && i < n_settings) { int type = prop[bytes_parsed++]; CARD16 nlen; CARD32 vlen, ival = 0; char name[128]; /* The names we are looking for are not this long. */ char sval[128]; /* The values we are looking for are not this long. */ int want_this; int to_cpy; sval[0] = '\0'; ++i; ++bytes_parsed; /* Padding */ memcpy (&nlen, prop+bytes_parsed, 2); bytes_parsed += 2; if (my_bo != that_bo) nlen = SWAP16 (nlen); if (bytes_parsed+nlen > bytes) return BadLength; to_cpy = nlen > 127 ? 127 : nlen; memcpy (name, prop+bytes_parsed, to_cpy); name[to_cpy] = '\0'; bytes_parsed += nlen; bytes_parsed = PAD (bytes_parsed); bytes_parsed += 4; /* Skip serial for this value */ if (bytes_parsed > bytes) return BadLength; want_this = #ifdef HAVE_XFT (nlen > 6 && strncmp (name, "Xft/", 4) == 0) || #endif (strcmp (XSETTINGS_FONT_NAME, name) == 0) || (strcmp (XSETTINGS_TOOL_BAR_STYLE, name) == 0); switch (type) { case 0: /* Integer */ if (bytes_parsed+4 > bytes) return BadLength; if (want_this) { memcpy (&ival, prop+bytes_parsed, 4); if (my_bo != that_bo) ival = SWAP32 (ival); } bytes_parsed += 4; break; case 1: /* String */ if (bytes_parsed+4 > bytes) return BadLength; memcpy (&vlen, prop+bytes_parsed, 4); bytes_parsed += 4; if (my_bo != that_bo) vlen = SWAP32 (vlen); if (want_this) { to_cpy = vlen > 127 ? 127 : vlen; memcpy (sval, prop+bytes_parsed, to_cpy); sval[to_cpy] = '\0'; } bytes_parsed += vlen; bytes_parsed = PAD (bytes_parsed); break; case 2: /* RGB value */ /* No need to parse this */ if (bytes_parsed+8 > bytes) return BadLength; bytes_parsed += 8; /* 4 values (r, b, g, alpha), 2 bytes each. */ break; default: /* Parse Error */ return BadValue; } if (want_this) { ++settings_seen; if (strcmp (name, XSETTINGS_FONT_NAME) == 0) { settings->font = xstrdup (sval); settings->seen |= SEEN_FONT; } else if (strcmp (name, XSETTINGS_TOOL_BAR_STYLE) == 0) { settings->tb_style = xstrdup (sval); settings->seen |= SEEN_TB_STYLE; } #ifdef HAVE_XFT else if (strcmp (name, "Xft/Antialias") == 0) { settings->seen |= SEEN_AA; settings->aa = ival != 0; } else if (strcmp (name, "Xft/Hinting") == 0) { settings->seen |= SEEN_HINTING; settings->hinting = ival != 0; } # ifdef FC_HINT_STYLE else if (strcmp (name, "Xft/HintStyle") == 0) { settings->seen |= SEEN_HINTSTYLE; if (strcmp (sval, "hintnone") == 0) settings->hintstyle = FC_HINT_NONE; else if (strcmp (sval, "hintslight") == 0) settings->hintstyle = FC_HINT_SLIGHT; else if (strcmp (sval, "hintmedium") == 0) settings->hintstyle = FC_HINT_MEDIUM; else if (strcmp (sval, "hintfull") == 0) settings->hintstyle = FC_HINT_FULL; else settings->seen &= ~SEEN_HINTSTYLE; } # endif else if (strcmp (name, "Xft/RGBA") == 0) { settings->seen |= SEEN_RGBA; if (strcmp (sval, "none") == 0) settings->rgba = FC_RGBA_NONE; else if (strcmp (sval, "rgb") == 0) settings->rgba = FC_RGBA_RGB; else if (strcmp (sval, "bgr") == 0) settings->rgba = FC_RGBA_BGR; else if (strcmp (sval, "vrgb") == 0) settings->rgba = FC_RGBA_VRGB; else if (strcmp (sval, "vbgr") == 0) settings->rgba = FC_RGBA_VBGR; else settings->seen &= ~SEEN_RGBA; } else if (strcmp (name, "Xft/DPI") == 0) { settings->seen |= SEEN_DPI; settings->dpi = (double)ival/1024.0; } else if (strcmp (name, "Xft/lcdfilter") == 0) { settings->seen |= SEEN_LCDFILTER; if (strcmp (sval, "none") == 0) settings->lcdfilter = FC_LCD_NONE; else if (strcmp (sval, "lcddefault") == 0) settings->lcdfilter = FC_LCD_DEFAULT; else settings->seen &= ~SEEN_LCDFILTER; } #endif /* HAVE_XFT */ } } return settings_seen; } static int read_settings (struct x_display_info *dpyinfo, struct xsettings *settings) { Atom act_type; int act_form; unsigned long nitems, bytes_after; unsigned char *prop = NULL; Display *dpy = dpyinfo->display; int rc; x_catch_errors (dpy); rc = XGetWindowProperty (dpy, dpyinfo->xsettings_window, dpyinfo->Xatom_xsettings_prop, 0, LONG_MAX, False, AnyPropertyType, &act_type, &act_form, &nitems, &bytes_after, &prop); if (rc == Success && prop != NULL && act_form == 8 && nitems > 0 && act_type == dpyinfo->Xatom_xsettings_prop) rc = parse_settings (prop, nitems, settings); XFree (prop); x_uncatch_errors (); return rc != 0; } static void apply_xft_settings (struct x_display_info *dpyinfo, int send_event_p, struct xsettings *settings) { #ifdef HAVE_XFT FcPattern *pat; struct xsettings oldsettings; int changed = 0; char buf[256]; memset (&oldsettings, 0, sizeof (oldsettings)); buf[0] = '\0'; pat = FcPatternCreate (); XftDefaultSubstitute (dpyinfo->display, XScreenNumberOfScreen (dpyinfo->screen), pat); FcPatternGetBool (pat, FC_ANTIALIAS, 0, &oldsettings.aa); FcPatternGetBool (pat, FC_HINTING, 0, &oldsettings.hinting); # ifdef FC_HINT_STYLE FcPatternGetInteger (pat, FC_HINT_STYLE, 0, &oldsettings.hintstyle); # endif FcPatternGetInteger (pat, FC_LCD_FILTER, 0, &oldsettings.lcdfilter); FcPatternGetInteger (pat, FC_RGBA, 0, &oldsettings.rgba); FcPatternGetDouble (pat, FC_DPI, 0, &oldsettings.dpi); if ((settings->seen & SEEN_AA) != 0 && oldsettings.aa != settings->aa) { FcPatternDel (pat, FC_ANTIALIAS); FcPatternAddBool (pat, FC_ANTIALIAS, settings->aa); ++changed; oldsettings.aa = settings->aa; } sprintf (buf, "Antialias: %d", oldsettings.aa); if ((settings->seen & SEEN_HINTING) != 0 && oldsettings.hinting != settings->hinting) { FcPatternDel (pat, FC_HINTING); FcPatternAddBool (pat, FC_HINTING, settings->hinting); ++changed; oldsettings.hinting = settings->hinting; } if (strlen (buf) > 0) strcat (buf, ", "); sprintf (buf+strlen (buf), "Hinting: %d", oldsettings.hinting); if ((settings->seen & SEEN_RGBA) != 0 && oldsettings.rgba != settings->rgba) { FcPatternDel (pat, FC_RGBA); FcPatternAddInteger (pat, FC_RGBA, settings->rgba); oldsettings.rgba = settings->rgba; ++changed; } if (strlen (buf) > 0) strcat (buf, ", "); sprintf (buf+strlen (buf), "RGBA: %d", oldsettings.rgba); /* Older fontconfig versions don't have FC_LCD_FILTER. */ if ((settings->seen & SEEN_LCDFILTER) != 0 && oldsettings.lcdfilter != settings->lcdfilter) { FcPatternDel (pat, FC_LCD_FILTER); FcPatternAddInteger (pat, FC_LCD_FILTER, settings->lcdfilter); ++changed; oldsettings.lcdfilter = settings->lcdfilter; } if (strlen (buf) > 0) strcat (buf, ", "); sprintf (buf+strlen (buf), "LCDFilter: %d", oldsettings.lcdfilter); # ifdef FC_HINT_STYLE if ((settings->seen & SEEN_HINTSTYLE) != 0 && oldsettings.hintstyle != settings->hintstyle) { FcPatternDel (pat, FC_HINT_STYLE); FcPatternAddInteger (pat, FC_HINT_STYLE, settings->hintstyle); ++changed; oldsettings.hintstyle = settings->hintstyle; } # endif if (strlen (buf) > 0) strcat (buf, ", "); sprintf (buf+strlen (buf), "Hintstyle: %d", oldsettings.hintstyle); if ((settings->seen & SEEN_DPI) != 0 && oldsettings.dpi != settings->dpi && settings->dpi > 0) { Lisp_Object frame, tail; FcPatternDel (pat, FC_DPI); FcPatternAddDouble (pat, FC_DPI, settings->dpi); ++changed; oldsettings.dpi = settings->dpi; /* Change the DPI on this display and all frames on the display. */ dpyinfo->resy = dpyinfo->resx = settings->dpi; FOR_EACH_FRAME (tail, frame) if (FRAME_X_P (XFRAME (frame)) && FRAME_X_DISPLAY_INFO (XFRAME (frame)) == dpyinfo) XFRAME (frame)->resy = XFRAME (frame)->resx = settings->dpi; } if (strlen (buf) > 0) strcat (buf, ", "); sprintf (buf+strlen (buf), "DPI: %lf", oldsettings.dpi); if (changed) { XftDefaultSet (dpyinfo->display, pat); if (send_event_p) store_config_changed_event (Qfont_render, XCAR (dpyinfo->name_list_element)); Vxft_settings = make_string (buf, strlen (buf)); } else FcPatternDestroy (pat); #endif /* HAVE_XFT */ } static void read_and_apply_settings (struct x_display_info *dpyinfo, int send_event_p) { struct xsettings settings; Lisp_Object dpyname = XCAR (dpyinfo->name_list_element); if (!read_settings (dpyinfo, &settings)) return; apply_xft_settings (dpyinfo, True, &settings); if (settings.seen & SEEN_TB_STYLE) { Lisp_Object style = Qnil; if (strcmp (settings.tb_style, "both") == 0) style = Qboth; else if (strcmp (settings.tb_style, "both-horiz") == 0) style = Qboth_horiz; else if (strcmp (settings.tb_style, "icons") == 0) style = Qimage; else if (strcmp (settings.tb_style, "text") == 0) style = Qtext; if (!NILP (style) && !EQ (style, current_tool_bar_style)) { current_tool_bar_style = style; if (send_event_p) store_config_changed_event (Qtool_bar_style, dpyname); } xfree (settings.tb_style); } if (settings.seen & SEEN_FONT) { if (!current_font || strcmp (current_font, settings.font) != 0) { xfree (current_font); current_font = settings.font; if (send_event_p) store_config_changed_event (Qfont_name, dpyname); } else xfree (settings.font); } } void xft_settings_event (struct x_display_info *dpyinfo, XEvent *event) { int check_window_p = 0; int apply_settings = 0; switch (event->type) { case DestroyNotify: if (dpyinfo->xsettings_window == event->xany.window) check_window_p = 1; break; case ClientMessage: if (event->xclient.message_type == dpyinfo->Xatom_xsettings_mgr && event->xclient.data.l[1] == dpyinfo->Xatom_xsettings_sel && event->xclient.window == dpyinfo->root_window) check_window_p = 1; break; case PropertyNotify: if (event->xproperty.window == dpyinfo->xsettings_window && event->xproperty.state == PropertyNewValue && event->xproperty.atom == dpyinfo->Xatom_xsettings_prop) apply_settings = 1; break; } if (check_window_p) { dpyinfo->xsettings_window = None; get_prop_window (dpyinfo); if (dpyinfo->xsettings_window != None) apply_settings = 1; } if (apply_settings) read_and_apply_settings (dpyinfo, True); } static void init_gconf (void) { #if defined (HAVE_GCONF) && defined (HAVE_XFT) char *s; #ifdef HAVE_G_TYPE_INIT g_type_init (); #endif gconf_client = gconf_client_get_default (); s = gconf_client_get_string (gconf_client, SYSTEM_MONO_FONT, NULL); if (s) { current_mono_font = xstrdup (s); g_free (s); } s = gconf_client_get_string (gconf_client, SYSTEM_FONT, NULL); if (s) { current_font = xstrdup (s); g_free (s); } gconf_client_set_error_handling (gconf_client, GCONF_CLIENT_HANDLE_NONE); gconf_client_add_dir (gconf_client, SYSTEM_MONO_FONT, GCONF_CLIENT_PRELOAD_ONELEVEL, NULL); gconf_client_notify_add (gconf_client, SYSTEM_MONO_FONT, something_changedCB, NULL, NULL, NULL); #endif /* HAVE_GCONF && HAVE_XFT */ } static void init_xsettings (struct x_display_info *dpyinfo) { Display *dpy = dpyinfo->display; BLOCK_INPUT; /* Select events so we can detect client messages sent when selection owner changes. */ XSelectInput (dpy, dpyinfo->root_window, StructureNotifyMask); get_prop_window (dpyinfo); if (dpyinfo->xsettings_window != None) read_and_apply_settings (dpyinfo, False); UNBLOCK_INPUT; } void xsettings_initialize (struct x_display_info *dpyinfo) { if (first_dpyinfo == NULL) first_dpyinfo = dpyinfo; init_gconf (); init_xsettings (dpyinfo); } const char * xsettings_get_system_font (void) { return current_mono_font; } #ifdef USE_LUCID const char * xsettings_get_system_normal_font (void) { return current_font; } #endif DEFUN ("font-get-system-normal-font", Ffont_get_system_normal_font, Sfont_get_system_normal_font, 0, 0, 0, doc: /* Get the system default application font. */) (void) { return current_font ? make_string (current_font, strlen (current_font)) : Qnil; } DEFUN ("font-get-system-font", Ffont_get_system_font, Sfont_get_system_font, 0, 0, 0, doc: /* Get the system default fixed width font. */) (void) { return current_mono_font ? make_string (current_mono_font, strlen (current_mono_font)) : Qnil; } DEFUN ("tool-bar-get-system-style", Ftool_bar_get_system_style, Stool_bar_get_system_style, 0, 0, 0, doc: /* Get the system tool bar style. If no system tool bar style is known, return `tool-bar-style' if set to a known style. Otherwise return image. */) (void) { if (EQ (Vtool_bar_style, Qimage) || EQ (Vtool_bar_style, Qtext) || EQ (Vtool_bar_style, Qboth) || EQ (Vtool_bar_style, Qboth_horiz) || EQ (Vtool_bar_style, Qtext_image_horiz)) return Vtool_bar_style; if (!NILP (current_tool_bar_style)) return current_tool_bar_style; return Qimage; } void syms_of_xsettings (void) { current_mono_font = NULL; current_font = NULL; first_dpyinfo = NULL; #ifdef HAVE_GCONF gconf_client = NULL; #endif Qmonospace_font_name = intern_c_string ("monospace-font-name"); staticpro (&Qmonospace_font_name); Qfont_name = intern_c_string ("font-name"); staticpro (&Qfont_name); Qfont_render = intern_c_string ("font-render"); staticpro (&Qfont_render); defsubr (&Sfont_get_system_font); defsubr (&Sfont_get_system_normal_font); DEFVAR_BOOL ("font-use-system-font", use_system_font, doc: /* *Non-nil means to apply the system defined font dynamically. When this is non-nil and the system defined fixed width font changes, we update frames dynamically. If this variable is nil, Emacs ignores system font changes. */); use_system_font = 0; DEFVAR_LISP ("xft-settings", Vxft_settings, doc: /* Font settings applied to Xft. */); Vxft_settings = make_string ("", 0); #ifdef HAVE_XFT Fprovide (intern_c_string ("font-render-setting"), Qnil); #ifdef HAVE_GCONF Fprovide (intern_c_string ("system-font-setting"), Qnil); #endif #endif current_tool_bar_style = Qnil; Qtool_bar_style = intern_c_string ("tool-bar-style"); staticpro (&Qtool_bar_style); defsubr (&Stool_bar_get_system_style); Fprovide (intern_c_string ("dynamic-setting"), Qnil); }