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/* Functions for handling font and other changes dynamically.
Copyright (C) 2009-2024 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 <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <float.h>
#include <limits.h>
#include <fcntl.h>
#include <byteswap.h>
#include "lisp.h"
#ifndef HAVE_PGTK
#include "xterm.h"
#else
#include "gtkutil.h"
#endif
#include "xsettings.h"
#include "frame.h"
#include "keyboard.h"
#include "blockinput.h"
#include "termhooks.h"
#include "pdumper.h"
#ifndef HAVE_PGTK
#include <X11/Xproto.h>
#else
typedef unsigned short CARD16;
typedef unsigned int CARD32;
#endif
#ifdef HAVE_GSETTINGS
#include <glib-object.h>
#include <gio/gio.h>
#endif
#ifdef HAVE_GCONF
#include <gconf/gconf-client.h>
#endif
#ifdef USE_CAIRO
#include <fontconfig/fontconfig.h>
#include "ftfont.h"
#elif defined HAVE_XFT
#include <X11/Xft/Xft.h>
#endif
#if defined USE_CAIRO && defined CAIRO_HAS_FT_FONT
#include <cairo/cairo-ft.h>
#endif
static char *current_mono_font;
static char *current_font;
static Display_Info *first_dpyinfo;
static Lisp_Object current_tool_bar_style;
/* Store a config changed event in to the event queue. */
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);
}
/* Return true if DPYINFO is still valid. */
static bool
dpyinfo_valid (Display_Info *dpyinfo)
{
bool found = false;
if (dpyinfo != NULL)
{
Display_Info *d;
for (d = x_display_list; !found && d; d = d->next)
#ifndef HAVE_PGTK
found = d == dpyinfo && d->display == dpyinfo->display;
#else
found = d == dpyinfo && d->gdpy == dpyinfo->gdpy;
#endif
}
return found;
}
/* Store a monospace font change event if the monospaced font changed. */
#if (defined USE_CAIRO || defined HAVE_XFT) && (defined HAVE_GSETTINGS || defined HAVE_GCONF)
static void
store_monospaced_changed (const char *newfont)
{
if (current_mono_font != NULL && strcmp (newfont, current_mono_font) == 0)
return; /* No change. */
dupstring (&current_mono_font, newfont);
if (dpyinfo_valid (first_dpyinfo) && use_system_font)
{
store_config_changed_event (Qmonospace_font_name,
XCAR (first_dpyinfo->name_list_element));
}
}
#endif
/* Store a font name change event if the font name changed. */
#if defined USE_CAIRO || defined HAVE_XFT
static void
store_font_name_changed (const char *newfont)
{
if (current_font != NULL && strcmp (newfont, current_font) == 0)
return; /* No change. */
dupstring (&current_font, newfont);
if (dpyinfo_valid (first_dpyinfo))
{
store_config_changed_event (Qfont_name,
XCAR (first_dpyinfo->name_list_element));
}
}
#endif /* USE_CAIRO || HAVE_XFT */
/* Map TOOL_BAR_STYLE from a string to its corresponding Lisp value.
Return Qnil if TOOL_BAR_STYLE is not known. */
static Lisp_Object
map_tool_bar_style (const char *tool_bar_style)
{
Lisp_Object style = Qnil;
if (tool_bar_style)
{
if (strcmp (tool_bar_style, "both") == 0)
style = Qboth;
else if (strcmp (tool_bar_style, "both-horiz") == 0)
style = Qboth_horiz;
else if (strcmp (tool_bar_style, "icons") == 0)
style = Qimage;
else if (strcmp (tool_bar_style, "text") == 0)
style = Qtext;
}
return style;
}
/* Store a tool bar style change event if the tool bar style changed. */
static void
store_tool_bar_style_changed (const char *newstyle,
Display_Info *dpyinfo)
{
Lisp_Object style = map_tool_bar_style (newstyle);
if (EQ (current_tool_bar_style, style))
return; /* No change. */
current_tool_bar_style = style;
if (dpyinfo_valid (dpyinfo))
store_config_changed_event (Qtool_bar_style,
XCAR (dpyinfo->name_list_element));
}
#ifndef HAVE_PGTK
#if defined USE_CAIRO || defined HAVE_XFT
#define XSETTINGS_FONT_NAME "Gtk/FontName"
#endif
#define XSETTINGS_TOOL_BAR_STYLE "Gtk/ToolbarStyle"
#endif
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
{
#if defined USE_CAIRO || defined HAVE_XFT
FcBool aa, hinting;
int rgba, lcdfilter, hintstyle;
double dpi;
char *font;
#endif
char *tb_style;
unsigned seen;
};
#ifdef HAVE_PGTK
/* The cairo font_options as obtained using gsettings. */
static cairo_font_options_t *font_options;
#endif
#ifdef HAVE_GSETTINGS
#define GSETTINGS_SCHEMA "org.gnome.desktop.interface"
#define GSETTINGS_TOOL_BAR_STYLE "toolbar-style"
#if defined USE_CAIRO || defined HAVE_XFT
#define GSETTINGS_MONO_FONT "monospace-font-name"
#define GSETTINGS_FONT_NAME "font-name"
#endif
#ifdef HAVE_PGTK
#define GSETTINGS_FONT_ANTIALIASING "font-antialiasing"
#define GSETTINGS_FONT_RGBA_ORDER "font-rgba-order"
#define GSETTINGS_FONT_HINTING "font-hinting"
#endif
/* The single GSettings instance, or NULL if not connected to GSettings. */
static GSettings *gsettings_client;
#if defined HAVE_PGTK && defined HAVE_GSETTINGS
static bool
xg_settings_key_valid_p (GSettings *settings, const char *key)
{
#ifdef GLIB_VERSION_2_32
GSettingsSchema *schema;
bool rc;
g_object_get (G_OBJECT (settings),
"settings-schema", &schema,
NULL);
if (!schema)
return false;
rc = g_settings_schema_has_key (schema, key);
g_settings_schema_unref (schema);
return rc;
#else
return false;
#endif
}
#endif
#ifdef HAVE_PGTK
/* Store an event for re-rendering of the fonts. */
static void
store_font_options_changed (void)
{
if (dpyinfo_valid (first_dpyinfo))
store_config_changed_event (Qfont_render,
XCAR (first_dpyinfo->name_list_element));
}
/* Apply changes in the hinting system setting. */
static void
apply_gsettings_font_hinting (GSettings *settings)
{
GVariant *val;
const char *hinting;
if (!xg_settings_key_valid_p (settings, GSETTINGS_FONT_HINTING))
return;
val = g_settings_get_value (settings, GSETTINGS_FONT_HINTING);
if (val)
{
g_variant_ref_sink (val);
if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
{
hinting = g_variant_get_string (val, NULL);
if (!strcmp (hinting, "full"))
cairo_font_options_set_hint_style (font_options,
CAIRO_HINT_STYLE_FULL);
else if (!strcmp (hinting, "medium"))
cairo_font_options_set_hint_style (font_options,
CAIRO_HINT_STYLE_MEDIUM);
else if (!strcmp (hinting, "slight"))
cairo_font_options_set_hint_style (font_options,
CAIRO_HINT_STYLE_SLIGHT);
else if (!strcmp (hinting, "none"))
cairo_font_options_set_hint_style (font_options,
CAIRO_HINT_STYLE_NONE);
}
g_variant_unref (val);
}
}
/* Apply changes in the antialiasing system setting. */
static void
apply_gsettings_font_antialias (GSettings *settings)
{
GVariant *val;
const char *antialias;
if (!xg_settings_key_valid_p (settings, GSETTINGS_FONT_ANTIALIASING))
return;
val = g_settings_get_value (settings, GSETTINGS_FONT_ANTIALIASING);
if (val)
{
g_variant_ref_sink (val);
if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
{
antialias = g_variant_get_string (val, NULL);
if (!strcmp (antialias, "none"))
cairo_font_options_set_antialias (font_options,
CAIRO_ANTIALIAS_NONE);
else if (!strcmp (antialias, "grayscale"))
cairo_font_options_set_antialias (font_options,
CAIRO_ANTIALIAS_GRAY);
else if (!strcmp (antialias, "rgba"))
cairo_font_options_set_antialias (font_options,
CAIRO_ANTIALIAS_SUBPIXEL);
}
g_variant_unref (val);
}
}
/* Apply the settings for the rgb element ordering. */
static void
apply_gsettings_font_rgba_order (GSettings *settings)
{
GVariant *val;
const char *rgba_order;
if (!xg_settings_key_valid_p (settings, GSETTINGS_FONT_RGBA_ORDER))
return;
val = g_settings_get_value (settings,
GSETTINGS_FONT_RGBA_ORDER);
if (val)
{
g_variant_ref_sink (val);
if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
{
rgba_order = g_variant_get_string (val, NULL);
if (!strcmp (rgba_order, "rgb"))
cairo_font_options_set_subpixel_order (font_options,
CAIRO_SUBPIXEL_ORDER_RGB);
else if (!strcmp (rgba_order, "bgr"))
cairo_font_options_set_subpixel_order (font_options,
CAIRO_SUBPIXEL_ORDER_BGR);
else if (!strcmp (rgba_order, "vrgb"))
cairo_font_options_set_subpixel_order (font_options,
CAIRO_SUBPIXEL_ORDER_VRGB);
else if (!strcmp (rgba_order, "vbgr"))
cairo_font_options_set_subpixel_order (font_options,
CAIRO_SUBPIXEL_ORDER_VBGR);
}
g_variant_unref (val);
}
}
#endif /* HAVE_PGTK */
/* Callback called when something changed in GSettings. */
static void
something_changed_gsettingsCB (GSettings *settings,
gchar *key,
gpointer user_data)
{
GVariant *val;
if (strcmp (key, GSETTINGS_TOOL_BAR_STYLE) == 0)
{
val = g_settings_get_value (settings, GSETTINGS_TOOL_BAR_STYLE);
if (val)
{
g_variant_ref_sink (val);
if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
{
const gchar *newstyle = g_variant_get_string (val, NULL);
store_tool_bar_style_changed (newstyle, first_dpyinfo);
}
g_variant_unref (val);
}
}
#if defined USE_CAIRO || defined HAVE_XFT
else if (strcmp (key, GSETTINGS_MONO_FONT) == 0)
{
val = g_settings_get_value (settings, GSETTINGS_MONO_FONT);
if (val)
{
g_variant_ref_sink (val);
if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
{
const gchar *newfont = g_variant_get_string (val, NULL);
store_monospaced_changed (newfont);
}
g_variant_unref (val);
}
}
else if (strcmp (key, GSETTINGS_FONT_NAME) == 0)
{
val = g_settings_get_value (settings, GSETTINGS_FONT_NAME);
if (val)
{
g_variant_ref_sink (val);
if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
{
const gchar *newfont = g_variant_get_string (val, NULL);
store_font_name_changed (newfont);
}
g_variant_unref (val);
}
}
#endif /* USE_CAIRO || HAVE_XFT */
#ifdef HAVE_PGTK
else if (!strcmp (key, GSETTINGS_FONT_ANTIALIASING))
{
apply_gsettings_font_antialias (settings);
store_font_options_changed ();
}
else if (!strcmp (key, GSETTINGS_FONT_HINTING))
{
apply_gsettings_font_hinting (settings);
store_font_options_changed ();
}
else if (!strcmp (key, GSETTINGS_FONT_RGBA_ORDER))
{
apply_gsettings_font_rgba_order (settings);
store_font_options_changed ();
}
#endif /* HAVE_PGTK */
}
#endif /* HAVE_GSETTINGS */
#ifdef HAVE_GCONF
#define GCONF_TOOL_BAR_STYLE "/desktop/gnome/interface/toolbar_style"
#if defined USE_CAIRO || defined HAVE_XFT
#define GCONF_MONO_FONT "/desktop/gnome/interface/monospace_font_name"
#define GCONF_FONT_NAME "/desktop/gnome/interface/font_name"
#endif
/* The single GConf instance, or NULL if not connected to GConf. */
static GConfClient *gconf_client;
/* Callback called when something changed in GConf that we care about. */
static void
something_changed_gconfCB (GConfClient *client,
guint cnxn_id,
GConfEntry *entry,
gpointer user_data)
{
GConfValue *v = gconf_entry_get_value (entry);
const char *key = gconf_entry_get_key (entry);
if (!v || v->type != GCONF_VALUE_STRING || ! key) return;
if (strcmp (key, GCONF_TOOL_BAR_STYLE) == 0)
{
const char *value = gconf_value_get_string (v);
store_tool_bar_style_changed (value, first_dpyinfo);
}
#if defined USE_CAIRO || defined HAVE_XFT
else if (strcmp (key, GCONF_MONO_FONT) == 0)
{
const char *value = gconf_value_get_string (v);
store_monospaced_changed (value);
}
else if (strcmp (key, GCONF_FONT_NAME) == 0)
{
const char *value = gconf_value_get_string (v);
store_font_name_changed (value);
}
#endif /* USE_CAIRO || HAVE_XFT */
}
#endif /* HAVE_GCONF */
#if defined USE_CAIRO || defined 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 /* USE_CAIRO || HAVE_XFT */
#ifndef HAVE_PGTK
/* Find the window that contains the XSETTINGS property values. */
static void
get_prop_window (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);
}
#endif
#ifndef HAVE_PGTK
#define PAD(nr) (((nr) + 3) & ~3)
/* Parse xsettings and extract those that deal with Xft.
See https://freedesktop.org/wiki/Specifications/XSettingsRegistry/
and https://specifications.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,
unsigned long bytes,
struct xsettings *settings)
{
int int1 = 1;
int my_bo = *(char *) &int1 == 1 ? LSBFirst : MSBFirst;
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 settings_seen;
memcpy (&n_settings, prop+8, 4);
if (my_bo != that_bo) n_settings = bswap_32 (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. */
bool 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 = bswap_16 (nlen);
if (bytes_parsed + nlen > bytes) return settings_seen;
to_cpy = min (nlen, sizeof name - 1);
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 settings_seen;
want_this = strcmp (XSETTINGS_TOOL_BAR_STYLE, name) == 0;
#if defined USE_CAIRO || defined HAVE_XFT
if ((nlen > 6 && memcmp (name, "Xft/", 4) == 0)
|| strcmp (XSETTINGS_FONT_NAME, name) == 0)
want_this = true;
#endif
switch (type)
{
case 0: /* Integer */
if (bytes_parsed + 4 > bytes) return settings_seen;
if (want_this)
{
memcpy (&ival, prop+bytes_parsed, 4);
if (my_bo != that_bo) ival = bswap_32 (ival);
}
bytes_parsed += 4;
break;
case 1: /* String */
if (bytes_parsed + 4 > bytes) return settings_seen;
memcpy (&vlen, prop+bytes_parsed, 4);
bytes_parsed += 4;
if (my_bo != that_bo) vlen = bswap_32 (vlen);
if (want_this)
{
to_cpy = min (vlen, sizeof sval - 1);
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 settings_seen;
bytes_parsed += 8; /* 4 values (r, b, g, alpha), 2 bytes each. */
break;
default: /* Parse Error */
return settings_seen;
}
if (want_this)
{
if (strcmp (name, XSETTINGS_TOOL_BAR_STYLE) == 0)
{
dupstring (&settings->tb_style, sval);
settings->seen |= SEEN_TB_STYLE;
}
#if defined USE_CAIRO || defined HAVE_XFT
else if (strcmp (name, XSETTINGS_FONT_NAME) == 0)
{
dupstring (&settings->font, sval);
settings->seen |= SEEN_FONT;
}
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 && ival != (CARD32) -1)
{
settings->seen |= SEEN_DPI;
settings->dpi = 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 /* USE_CAIRO || HAVE_XFT */
else
want_this = false;
settings_seen += want_this;
}
}
return settings_seen;
}
#endif
#ifndef HAVE_PGTK
/* Read settings from the XSettings property window on display for DPYINFO.
Store settings read in SETTINGS.
Return true if successful. */
static bool
read_settings (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;
bool got_settings = false;
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)
got_settings = parse_settings (prop, nitems, settings) != 0;
XFree (prop);
x_uncatch_errors ();
return got_settings;
}
#endif
#ifndef HAVE_PGTK
/* Apply Xft settings in SETTINGS to the Xft library.
Store a Lisp event that Xft settings changed. */
static void
apply_xft_settings (Display_Info *dpyinfo,
struct xsettings *settings)
{
#if defined HAVE_XFT \
|| (defined USE_CAIRO && defined CAIRO_HAS_FC_FONT \
&& defined CAIRO_HAS_FT_FONT)
FcPattern *pat;
struct xsettings oldsettings;
bool changed = false;
#ifndef HAVE_XFT
cairo_font_options_t *options;
#endif
memset (&oldsettings, 0, sizeof (oldsettings));
pat = FcPatternCreate ();
#ifdef HAVE_XFT
XftDefaultSubstitute (dpyinfo->display,
XScreenNumberOfScreen (dpyinfo->screen),
pat);
#else
FcConfigSubstitute (NULL, pat, FcMatchPattern);
options = cairo_font_options_create ();
ftcrfont_get_default_font_options (dpyinfo, options);
cairo_ft_font_options_substitute (options, pat);
cairo_font_options_destroy (options);
FcDefaultSubstitute (pat);
#endif
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 = true;
oldsettings.aa = settings->aa;
}
if ((settings->seen & SEEN_HINTING) != 0
&& oldsettings.hinting != settings->hinting)
{
FcPatternDel (pat, FC_HINTING);
FcPatternAddBool (pat, FC_HINTING, settings->hinting);
changed = true;
oldsettings.hinting = settings->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 = true;
}
/* 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 = true;
oldsettings.lcdfilter = settings->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 = true;
oldsettings.hintstyle = settings->hintstyle;
}
#endif
#ifdef USE_CAIRO
/* When Cairo is being used, set oldsettings.dpi to dpyinfo->resx.
This is a gross hack, but seeing as Cairo fails to report
anything reasonable, just use it to avoid config-changed events
being sent at startup. */
oldsettings.dpi = dpyinfo->resx;
#endif
if ((settings->seen & SEEN_DPI) != 0
&& settings->dpi > 0
/* The following conjunct avoids setting `changed' to true when
old and new dpi settings do not differ "substantially".
Otherwise, the dynamic-setting Elisp code may process all sorts
of unrelated settings that override users' font customizations,
among others. Compare:
https://lists.gnu.org/r/emacs-devel/2016-05/msg00557.html
https://lists.gnu.org/r/bug-gnu-emacs/2016-12/msg00820.html
As soon as the dynamic-settings code has been tested and
verified, this Emacs 25.2 workaround should be removed. */
&& ((oldsettings.dpi >= settings->dpi
&& (oldsettings.dpi - settings->dpi) > 2)
|| ((settings->dpi > oldsettings.dpi)
&& (settings->dpi - oldsettings.dpi) > 2)))
{
FcPatternDel (pat, FC_DPI);
FcPatternAddDouble (pat, FC_DPI, settings->dpi);
changed = true;
oldsettings.dpi = settings->dpi;
/* Changing the DPI on this display affects all frames on it.
Check FRAME_RES_X and FRAME_RES_Y in frame.h to see how. */
dpyinfo->resy = dpyinfo->resx = settings->dpi;
}
if (changed)
{
static char const format[] =
"Antialias: %d, Hinting: %d, RGBA: %d, LCDFilter: %d, "
"Hintstyle: %d, DPI: %f";
enum
{
d_formats = 5,
d_growth = INT_BUFSIZE_BOUND (int) - sizeof "%d",
lf_formats = 1,
max_f_integer_digits = DBL_MAX_10_EXP + 1,
f_precision = 6,
lf_growth = (sizeof "-." + max_f_integer_digits + f_precision
- sizeof "%f")
};
char buf[sizeof format + d_formats * d_growth + lf_formats * lf_growth];
#ifdef HAVE_XFT
XftDefaultSet (dpyinfo->display, pat);
#else
FcPatternDestroy (pat);
#endif
store_config_changed_event (Qfont_render,
XCAR (dpyinfo->name_list_element));
Vxft_settings
= make_formatted_string (buf, format,
oldsettings.aa, oldsettings.hinting,
oldsettings.rgba, oldsettings.lcdfilter,
oldsettings.hintstyle, oldsettings.dpi);
}
else
FcPatternDestroy (pat);
#endif /* HAVE_XFT || (USE_CAIRO && CAIRO_HAS_FC_FONT && CAIRO_HAS_FT_FONT) */
}
#endif
#ifndef HAVE_PGTK
/* Read XSettings from the display for DPYINFO.
If SEND_EVENT_P store a Lisp event settings that changed. */
static void
read_and_apply_settings (Display_Info *dpyinfo, bool send_event_p)
{
struct xsettings settings;
if (!read_settings (dpyinfo, &settings))
return;
apply_xft_settings (dpyinfo, &settings);
if (settings.seen & SEEN_TB_STYLE)
{
if (send_event_p)
store_tool_bar_style_changed (settings.tb_style, dpyinfo);
else
current_tool_bar_style = map_tool_bar_style (settings.tb_style);
xfree (settings.tb_style);
}
#if defined USE_CAIRO || defined HAVE_XFT
if (settings.seen & SEEN_FONT)
{
if (send_event_p)
store_font_name_changed (settings.font);
else
dupstring (&current_font, settings.font);
xfree (settings.font);
}
#endif
}
#endif
#ifndef HAVE_PGTK
/* Check if EVENT for the display in DPYINFO is XSettings related.
Return true if it is, after performing associated side effects. */
bool
xft_settings_event (Display_Info *dpyinfo, const XEvent *event)
{
bool check_window_p = false, apply_settings_p = false;
switch (event->type)
{
case DestroyNotify:
if (dpyinfo->xsettings_window == event->xany.window)
check_window_p = true;
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 = true;
break;
case PropertyNotify:
if (event->xproperty.window == dpyinfo->xsettings_window
&& event->xproperty.state == PropertyNewValue
&& event->xproperty.atom == dpyinfo->Xatom_xsettings_prop)
apply_settings_p = true;
break;
}
if (check_window_p)
{
dpyinfo->xsettings_window = None;
get_prop_window (dpyinfo);
if (dpyinfo->xsettings_window != None)
apply_settings_p = true;
}
if (apply_settings_p)
read_and_apply_settings (dpyinfo, true);
return check_window_p || apply_settings_p;
}
#endif
/* Initialize GSettings and read startup values. */
static void
init_gsettings (void)
{
#ifdef HAVE_GSETTINGS
GVariant *val;
bool schema_found = false;
#if ! GLIB_CHECK_VERSION (2, 36, 0)
g_type_init ();
#endif
#if GLIB_CHECK_VERSION (2, 32, 0)
{
GSettingsSchema *sc = g_settings_schema_source_lookup
(g_settings_schema_source_get_default (),
GSETTINGS_SCHEMA,
true);
schema_found = sc != NULL;
if (sc) g_settings_schema_unref (sc);
}
#else
{
const gchar *const *schemas = g_settings_list_schemas ();
if (schemas == NULL) return;
while (! schema_found && *schemas != NULL)
schema_found = strcmp (*schemas++, GSETTINGS_SCHEMA) == 0;
}
#endif
if (!schema_found) return;
gsettings_client = g_settings_new (GSETTINGS_SCHEMA);
if (!gsettings_client) return;
g_object_ref_sink (G_OBJECT (gsettings_client));
g_signal_connect (G_OBJECT (gsettings_client), "changed",
G_CALLBACK (something_changed_gsettingsCB), NULL);
val = g_settings_get_value (gsettings_client, GSETTINGS_TOOL_BAR_STYLE);
if (val)
{
g_variant_ref_sink (val);
if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
current_tool_bar_style
= map_tool_bar_style (g_variant_get_string (val, NULL));
g_variant_unref (val);
}
#if defined USE_CAIRO || defined HAVE_XFT
val = g_settings_get_value (gsettings_client, GSETTINGS_MONO_FONT);
if (val)
{
g_variant_ref_sink (val);
if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
dupstring (&current_mono_font, g_variant_get_string (val, NULL));
g_variant_unref (val);
}
val = g_settings_get_value (gsettings_client, GSETTINGS_FONT_NAME);
if (val)
{
g_variant_ref_sink (val);
if (g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
dupstring (&current_font, g_variant_get_string (val, NULL));
g_variant_unref (val);
}
/* Only use the gsettings font entries for the Cairo backend
running on PGTK. */
#ifdef HAVE_PGTK
font_options = cairo_font_options_create ();
apply_gsettings_font_antialias (gsettings_client);
apply_gsettings_font_hinting (gsettings_client);
apply_gsettings_font_rgba_order (gsettings_client);
#endif /* HAVE_PGTK */
#endif /* USE_CAIRO || HAVE_XFT */
#endif /* HAVE_GSETTINGS */
}
/* Init GConf and read startup values. */
static void
init_gconf (void)
{
#if defined (HAVE_GCONF)
char *s;
#if ! GLIB_CHECK_VERSION (2, 36, 0)
g_type_init ();
#endif
gconf_client = gconf_client_get_default ();
gconf_client_set_error_handling (gconf_client, GCONF_CLIENT_HANDLE_NONE);
gconf_client_add_dir (gconf_client,
GCONF_TOOL_BAR_STYLE,
GCONF_CLIENT_PRELOAD_ONELEVEL,
NULL);
gconf_client_notify_add (gconf_client,
GCONF_TOOL_BAR_STYLE,
something_changed_gconfCB,
NULL, NULL, NULL);
s = gconf_client_get_string (gconf_client, GCONF_TOOL_BAR_STYLE, NULL);
if (s)
{
current_tool_bar_style = map_tool_bar_style (s);
g_free (s);
}
#if defined USE_CAIRO || defined HAVE_XFT
s = gconf_client_get_string (gconf_client, GCONF_MONO_FONT, NULL);
if (s)
{
dupstring (&current_mono_font, s);
g_free (s);
}
s = gconf_client_get_string (gconf_client, GCONF_FONT_NAME, NULL);
if (s)
{
dupstring (&current_font, s);
g_free (s);
}
gconf_client_add_dir (gconf_client,
GCONF_MONO_FONT,
GCONF_CLIENT_PRELOAD_ONELEVEL,
NULL);
gconf_client_notify_add (gconf_client,
GCONF_MONO_FONT,
something_changed_gconfCB,
NULL, NULL, NULL);
gconf_client_add_dir (gconf_client,
GCONF_FONT_NAME,
GCONF_CLIENT_PRELOAD_ONELEVEL,
NULL);
gconf_client_notify_add (gconf_client,
GCONF_FONT_NAME,
something_changed_gconfCB,
NULL, NULL, NULL);
#endif /* USE_CAIRO || HAVE_XFT */
#endif /* HAVE_GCONF */
}
#ifndef HAVE_PGTK
/* Init Xsettings and read startup values. */
static void
init_xsettings (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 ();
}
#endif
void
xsettings_initialize (Display_Info *dpyinfo)
{
if (first_dpyinfo == NULL) first_dpyinfo = dpyinfo;
init_gconf ();
#ifndef HAVE_PGTK
init_xsettings (dpyinfo);
#endif
init_gsettings ();
}
/* Return the system monospaced font.
May be NULL if not known. */
const char *
xsettings_get_system_font (void)
{
return current_mono_font;
}
#ifdef USE_LUCID
/* Return the system font.
May be NULL if not known. */
const char *
xsettings_get_system_normal_font (void)
{
return current_font;
}
#endif
#ifdef HAVE_PGTK
/* Return the cairo font options, updated from the gsettings font
config entries. The caller should call cairo_font_options_destroy
on the result. */
cairo_font_options_t *
xsettings_get_font_options (void)
{
if (font_options != NULL)
return cairo_font_options_copy (font_options);
else
/* GSettings is not configured. */
return cairo_font_options_create ();
}
#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.
The font is returned as either a font-spec or font name. */)
(void)
{
return current_font ? build_string (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.
The font is returned as either a font-spec or font name. */)
(void)
{
return current_mono_font ? build_string (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;
PDUMPER_IGNORE (current_mono_font);
current_font = NULL;
PDUMPER_IGNORE (current_font);
first_dpyinfo = NULL;
PDUMPER_IGNORE (first_dpyinfo);
#ifdef HAVE_GSETTINGS
gsettings_client = NULL;
PDUMPER_IGNORE (gsettings_client);
#endif
#ifdef HAVE_GCONF
gconf_client = NULL;
PDUMPER_IGNORE (gconf_client);
#endif
#ifdef HAVE_PGTK
font_options = NULL;
PDUMPER_IGNORE (font_options);
#endif
DEFSYM (Qmonospace_font_name, "monospace-font-name");
DEFSYM (Qfont_name, "font-name");
DEFSYM (Qfont_render, "font-render");
DEFSYM (Qdynamic_setting, "dynamic-setting");
DEFSYM (Qfont_render_setting, "font-render-setting");
DEFSYM (Qsystem_font_setting, "system-font-setting");
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 = false;
DEFVAR_LISP ("xft-settings", Vxft_settings,
doc: /* Font settings applied to Xft. */);
Vxft_settings = empty_unibyte_string;
#if defined USE_CAIRO || defined HAVE_XFT
Fprovide (Qfont_render_setting, Qnil);
#if defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
Fprovide (Qsystem_font_setting, Qnil);
#endif
#endif
current_tool_bar_style = Qnil;
DEFSYM (Qtool_bar_style, "tool-bar-style");
defsubr (&Stool_bar_get_system_style);
Fprovide (Qdynamic_setting, Qnil);
}
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