514 lines
13 KiB
C
514 lines
13 KiB
C
/* Deal with the X Resource Manager.
|
||
Copyright (C) 1990, 1993-1994, 2000-2024 Free Software Foundation,
|
||
Inc.
|
||
|
||
Author: Joseph Arceneaux
|
||
Created: 4/90
|
||
|
||
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 <unistd.h>
|
||
#include <errno.h>
|
||
#include <epaths.h>
|
||
#include <stdlib.h>
|
||
#include <stdio.h>
|
||
|
||
#include "lisp.h"
|
||
|
||
/* This may include sys/types.h, and that somehow loses
|
||
if this is not done before the other system files. */
|
||
#include "xterm.h"
|
||
|
||
#include <X11/Xlib.h>
|
||
#include <X11/Xatom.h>
|
||
#include <X11/X.h>
|
||
#include <X11/Xutil.h>
|
||
#include <X11/Xresource.h>
|
||
#ifdef HAVE_PWD_H
|
||
#include <pwd.h>
|
||
#endif
|
||
|
||
/* X file search path processing. */
|
||
|
||
|
||
/* The string which gets substituted for the %C escape in XFILESEARCHPATH
|
||
and friends, or zero if none was specified. */
|
||
static char *x_customization_string;
|
||
|
||
|
||
/* Return the value of the emacs.customization (Emacs.Customization)
|
||
resource, for later use in search path decoding. If we find no
|
||
such resource, return zero. */
|
||
static char *
|
||
x_get_customization_string (XrmDatabase db, const char *name,
|
||
const char *class)
|
||
{
|
||
char *full_name = alloca (strlen (name) + sizeof "customization" + 3);
|
||
char *full_class = alloca (strlen (class) + sizeof "Customization" + 3);
|
||
const char *result;
|
||
|
||
sprintf (full_name, "%s.%s", name, "customization");
|
||
sprintf (full_class, "%s.%s", class, "Customization");
|
||
|
||
result = x_get_string_resource (&db, full_name, full_class);
|
||
return result ? xstrdup (result) : NULL;
|
||
}
|
||
|
||
/* Expand all the Xt-style %-escapes in STRING, whose length is given
|
||
by STRING_LEN. Here are the escapes we're supposed to recognize:
|
||
|
||
%N The value of the application's class name
|
||
%T The value of the type parameter ("app-defaults" in this
|
||
context)
|
||
%S The value of the suffix parameter ("" in this context)
|
||
%L The language string associated with the specified display
|
||
(We use the "LANG" environment variable here, if it's set.)
|
||
%l The language part of the display's language string
|
||
(We treat this just like %L. If someone can tell us what
|
||
we're really supposed to do, dandy.)
|
||
%t The territory part of the display's language string
|
||
(This never gets used.)
|
||
%c The codeset part of the display's language string
|
||
(This never gets used either.)
|
||
%C The customization string retrieved from the resource
|
||
database associated with display.
|
||
(This is x_customization_string.)
|
||
|
||
Return the resource database if its file was read successfully, and
|
||
refers to %L only when the LANG environment variable is set, or
|
||
otherwise provided by X.
|
||
|
||
ESCAPED_SUFFIX is postpended to STRING if it is non-zero.
|
||
%-escapes in ESCAPED_SUFFIX are expanded.
|
||
|
||
Return NULL otherwise. */
|
||
|
||
static XrmDatabase
|
||
magic_db (const char *string, ptrdiff_t string_len, const char *class,
|
||
const char *escaped_suffix)
|
||
{
|
||
XrmDatabase db;
|
||
char *lang = getenv ("LANG");
|
||
|
||
ptrdiff_t path_size = 100;
|
||
char *path = xmalloc (path_size);
|
||
ptrdiff_t path_len = 0;
|
||
|
||
const char *p = string;
|
||
|
||
while (p < string + string_len)
|
||
{
|
||
/* The chunk we're about to stick on the end of result. */
|
||
const char *next = p;
|
||
ptrdiff_t next_len = 1;
|
||
|
||
if (*p == '%')
|
||
{
|
||
p++;
|
||
|
||
if (p >= string + string_len)
|
||
next_len = 0;
|
||
else
|
||
switch (*p)
|
||
{
|
||
case '%':
|
||
next = "%";
|
||
next_len = 1;
|
||
break;
|
||
|
||
case 'C':
|
||
if (x_customization_string)
|
||
{
|
||
next = x_customization_string;
|
||
next_len = strlen (next);
|
||
}
|
||
else
|
||
next_len = 0;
|
||
break;
|
||
|
||
case 'N':
|
||
next = class;
|
||
next_len = strlen (class);
|
||
break;
|
||
|
||
case 'T':
|
||
next = "app-defaults";
|
||
next_len = strlen (next);
|
||
break;
|
||
|
||
default:
|
||
case 'S':
|
||
next_len = 0;
|
||
break;
|
||
|
||
case 'L':
|
||
case 'l':
|
||
if (! lang)
|
||
{
|
||
xfree (path);
|
||
return NULL;
|
||
}
|
||
|
||
next = lang;
|
||
next_len = strlen (next);
|
||
break;
|
||
|
||
case 't':
|
||
case 'c':
|
||
xfree (path);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
/* Do we have room for this component followed by a '\0'? */
|
||
if (path_size - path_len <= next_len)
|
||
path = xpalloc (path, &path_size, path_len - path_size + next_len + 1,
|
||
-1, sizeof *path);
|
||
|
||
memcpy (path + path_len, next, next_len);
|
||
path_len += next_len;
|
||
|
||
p++;
|
||
|
||
/* If we've reached the end of the string, append ESCAPED_SUFFIX. */
|
||
if (p >= string + string_len && escaped_suffix)
|
||
{
|
||
string = escaped_suffix;
|
||
string_len = strlen (string);
|
||
p = string;
|
||
escaped_suffix = NULL;
|
||
}
|
||
}
|
||
|
||
path[path_len] = '\0';
|
||
db = XrmGetFileDatabase (path);
|
||
xfree (path);
|
||
return db;
|
||
}
|
||
|
||
|
||
/* Find the first element of SEARCH_PATH which exists and is readable,
|
||
after expanding the %-escapes. Return 0 if we didn't find any, and
|
||
the path name of the one we found otherwise. */
|
||
|
||
static XrmDatabase
|
||
search_magic_path (const char *search_path, const char *class,
|
||
const char *escaped_suffix)
|
||
{
|
||
const char *s, *p;
|
||
|
||
for (s = search_path; *s; s = p)
|
||
{
|
||
for (p = s; *p && *p != ':'; p++)
|
||
;
|
||
|
||
if (p > s)
|
||
{
|
||
XrmDatabase db = magic_db (s, p - s, class, escaped_suffix);
|
||
if (db)
|
||
return db;
|
||
}
|
||
else if (*p == ':')
|
||
{
|
||
static char const ns[] = "%N%S";
|
||
XrmDatabase db = magic_db (ns, strlen (ns), class, escaped_suffix);
|
||
if (db)
|
||
return db;
|
||
}
|
||
|
||
if (*p == ':')
|
||
p++;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Producing databases for individual sources. */
|
||
|
||
static XrmDatabase
|
||
get_system_app (const char *class)
|
||
{
|
||
const char *path;
|
||
|
||
path = getenv ("XFILESEARCHPATH");
|
||
if (! path) path = PATH_X_DEFAULTS;
|
||
|
||
return search_magic_path (path, class, 0);
|
||
}
|
||
|
||
|
||
static XrmDatabase
|
||
get_fallback (Display *display)
|
||
{
|
||
return NULL;
|
||
}
|
||
|
||
|
||
static XrmDatabase
|
||
get_user_app (const char *class)
|
||
{
|
||
XrmDatabase db = 0;
|
||
const char *path;
|
||
|
||
/* Check for XUSERFILESEARCHPATH. It is a path of complete file
|
||
names, not directories. */
|
||
path = getenv ("XUSERFILESEARCHPATH");
|
||
if (path)
|
||
db = search_magic_path (path, class, 0);
|
||
|
||
if (! db)
|
||
{
|
||
/* Check for APPLRESDIR; it is a path of directories. In each,
|
||
we have to search for LANG/CLASS and then CLASS. */
|
||
path = getenv ("XAPPLRESDIR");
|
||
if (path)
|
||
{
|
||
db = search_magic_path (path, class, "/%L/%N");
|
||
if (!db)
|
||
db = search_magic_path (path, class, "/%N");
|
||
}
|
||
}
|
||
|
||
if (! db)
|
||
{
|
||
/* Check in the home directory. This is a bit of a hack; let's
|
||
hope one's home directory doesn't contain ':' or '%'. */
|
||
char const *home = get_homedir ();
|
||
db = search_magic_path (home, class, "/%L/%N");
|
||
if (! db)
|
||
db = search_magic_path (home, class, "/%N");
|
||
}
|
||
|
||
return db;
|
||
}
|
||
|
||
static char const xdefaults[] = ".Xdefaults";
|
||
|
||
static XrmDatabase
|
||
get_user_db (Display *display)
|
||
{
|
||
XrmDatabase db;
|
||
char *xdefs;
|
||
|
||
#ifdef PBaseSize /* Cheap way to test for X11R4 or later. */
|
||
xdefs = XResourceManagerString (display);
|
||
#else
|
||
xdefs = display->xdefaults;
|
||
#endif
|
||
|
||
if (xdefs != NULL)
|
||
db = XrmGetStringDatabase (xdefs);
|
||
else
|
||
{
|
||
/* Use ~/.Xdefaults. */
|
||
char const *home = get_homedir ();
|
||
char *filename = xmalloc (strlen (home) + 1 + sizeof xdefaults);
|
||
splice_dir_file (filename, home, xdefaults);
|
||
db = XrmGetFileDatabase (filename);
|
||
xfree (filename);
|
||
}
|
||
|
||
#ifdef HAVE_XSCREENRESOURCESTRING
|
||
/* Get the screen-specific resources too. */
|
||
xdefs = XScreenResourceString (DefaultScreenOfDisplay (display));
|
||
if (xdefs != NULL)
|
||
{
|
||
XrmMergeDatabases (XrmGetStringDatabase (xdefs), &db);
|
||
XFree (xdefs);
|
||
}
|
||
#endif
|
||
|
||
return db;
|
||
}
|
||
|
||
static XrmDatabase
|
||
get_environ_db (void)
|
||
{
|
||
XrmDatabase db;
|
||
char *p = getenv ("XENVIRONMENT");
|
||
char *filename = 0;
|
||
|
||
if (!p)
|
||
{
|
||
Lisp_Object system_name = Fsystem_name ();
|
||
if (STRINGP (system_name))
|
||
{
|
||
/* Use ~/.Xdefaults-HOSTNAME. */
|
||
char const *home = get_homedir ();
|
||
p = filename = xmalloc (strlen (home) + 1 + sizeof xdefaults
|
||
+ 1 + SBYTES (system_name));
|
||
char *e = splice_dir_file (p, home, xdefaults);
|
||
*e++ = '-';
|
||
lispstpcpy (e, system_name);
|
||
}
|
||
}
|
||
|
||
db = XrmGetFileDatabase (p);
|
||
|
||
xfree (filename);
|
||
|
||
return db;
|
||
}
|
||
|
||
/* External interface. */
|
||
|
||
/* Types of values that we can find in a database */
|
||
|
||
#define XrmStringType "String" /* String representation */
|
||
static XrmRepresentation x_rm_string; /* Quark representation */
|
||
|
||
/* Load X resources based on the display and a possible -xrm option. */
|
||
|
||
XrmDatabase
|
||
x_load_resources (Display *display, const char *xrm_string,
|
||
const char *myname, const char *myclass)
|
||
{
|
||
XrmDatabase user_database;
|
||
XrmDatabase rdb;
|
||
XrmDatabase db;
|
||
char line[256];
|
||
|
||
x_rm_string = XrmStringToQuark (XrmStringType);
|
||
#ifndef USE_X_TOOLKIT
|
||
/* pmr@osf.org says this shouldn't be done if USE_X_TOOLKIT.
|
||
I suspect it's because the toolkit version does this elsewhere. */
|
||
XrmInitialize ();
|
||
#endif
|
||
rdb = XrmGetStringDatabase ("");
|
||
|
||
#ifdef USE_MOTIF
|
||
/* Set double click time of list boxes in the file selection
|
||
dialog from `double-click-time'. */
|
||
if (FIXNUMP (Vdouble_click_time) && XFIXNUM (Vdouble_click_time) > 0)
|
||
{
|
||
sprintf (line, "%s*fsb*DirList.doubleClickInterval: %"pI"d",
|
||
myclass, XFIXNAT (Vdouble_click_time));
|
||
XrmPutLineResource (&rdb, line);
|
||
sprintf (line, "%s*fsb*ItemsList.doubleClickInterval: %"pI"d",
|
||
myclass, XFIXNAT (Vdouble_click_time));
|
||
XrmPutLineResource (&rdb, line);
|
||
}
|
||
#else /* not USE_MOTIF */
|
||
/* Add some font defaults. If the font `helv' doesn't exist,
|
||
widgets will use some other default font. */
|
||
sprintf (line, "Emacs.dialog*.background: grey75");
|
||
XrmPutLineResource (&rdb, line);
|
||
#if !(defined USE_CAIRO || defined HAVE_XFT) || !defined (USE_LUCID)
|
||
sprintf (line, "Emacs.dialog*.font: %s",
|
||
"-*-helvetica-medium-r-*--*-120-*-*-*-*-iso8859-1");
|
||
XrmPutLineResource (&rdb, line);
|
||
sprintf (line, "*XlwMenu*font: %s",
|
||
"-*-helvetica-medium-r-*--*-120-*-*-*-*-iso8859-1");
|
||
XrmPutLineResource (&rdb, line);
|
||
#endif
|
||
sprintf (line, "*XlwMenu*background: grey75");
|
||
XrmPutLineResource (&rdb, line);
|
||
sprintf (line, "Emacs*verticalScrollBar.background: grey75");
|
||
XrmPutLineResource (&rdb, line);
|
||
sprintf (line, "Emacs*horizontalScrollBar.background: grey75");
|
||
XrmPutLineResource (&rdb, line);
|
||
#endif /* not USE_MOTIF */
|
||
|
||
user_database = get_user_db (display);
|
||
|
||
/* Figure out what the "customization string" is, so we can use it
|
||
to decode paths. */
|
||
xfree (x_customization_string);
|
||
x_customization_string
|
||
= x_get_customization_string (user_database, myname, myclass);
|
||
|
||
/* Get application system defaults */
|
||
db = get_system_app (myclass);
|
||
if (db != NULL)
|
||
XrmMergeDatabases (db, &rdb);
|
||
|
||
/* Get Fallback resources */
|
||
db = get_fallback (display);
|
||
if (db != NULL)
|
||
XrmMergeDatabases (db, &rdb);
|
||
|
||
/* Get application user defaults */
|
||
db = get_user_app (myclass);
|
||
if (db != NULL)
|
||
XrmMergeDatabases (db, &rdb);
|
||
|
||
/* get User defaults */
|
||
if (user_database != NULL)
|
||
XrmMergeDatabases (user_database, &rdb);
|
||
|
||
/* Get Environment defaults. */
|
||
db = get_environ_db ();
|
||
if (db != NULL)
|
||
XrmMergeDatabases (db, &rdb);
|
||
|
||
/* Last, merge in any specification from the command line. */
|
||
if (xrm_string != NULL)
|
||
{
|
||
db = XrmGetStringDatabase (xrm_string);
|
||
if (db != NULL)
|
||
XrmMergeDatabases (db, &rdb);
|
||
}
|
||
|
||
return rdb;
|
||
}
|
||
|
||
|
||
/* Retrieve the value of the resource specified by NAME with class CLASS
|
||
and of type TYPE from database RDB. The value is returned in RET_VALUE. */
|
||
|
||
static int
|
||
x_get_resource (XrmDatabase rdb, const char *name, const char *class,
|
||
XrmRepresentation expected_type, XrmValue *ret_value)
|
||
{
|
||
XrmValue value;
|
||
XrmName namelist[100];
|
||
XrmClass classlist[100];
|
||
XrmRepresentation type;
|
||
|
||
XrmStringToNameList (name, namelist);
|
||
XrmStringToClassList (class, classlist);
|
||
|
||
if (XrmQGetResource (rdb, namelist, classlist, &type, &value) == True
|
||
&& (type == expected_type))
|
||
{
|
||
*ret_value = value;
|
||
return value.size;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Retrieve the string resource specified by NAME with CLASS from
|
||
database RDB. */
|
||
|
||
const char *
|
||
x_get_string_resource (void *v_rdb, const char *name, const char *class)
|
||
{
|
||
XrmDatabase *rdb = v_rdb;
|
||
XrmValue value;
|
||
|
||
if (inhibit_x_resources)
|
||
/* --quick was passed, so this is a no-op. */
|
||
return NULL;
|
||
|
||
if (x_get_resource (*rdb, name, class, x_rm_string, &value))
|
||
return (const char *) value.addr;
|
||
|
||
return NULL;
|
||
}
|