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/* Deal with the X Resource Manager.
Copyright (C) 1990, 1993-1994, 2000-2015 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 <http://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
#ifdef USE_MOTIF
/* For Vdouble_click_time. */
#include "keyboard.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);
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 = NULL;
ptrdiff_t next_len;
if (*p == '%')
{
p++;
if (p >= string + string_len)
next_len = 0;
else
switch (*p)
{
case '%':
next = "%";
next_len = 1;
break;
case 'C':
next = (x_customization_string
? x_customization_string
: "");
next_len = strlen (next);
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;
}
}
else
next = p, next_len = 1;
/* Do we have room for this component followed by a '\0'? */
if (path_size - path_len <= next_len)
{
if (min (PTRDIFF_MAX, SIZE_MAX) / 2 - 1 - path_len < next_len)
memory_full (SIZE_MAX);
path_size = (path_len + next_len + 1) * 2;
path = xrealloc (path, path_size);
}
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;
}
static char *
gethomedir (void)
{
struct passwd *pw;
char *ptr;
char *copy;
if ((ptr = getenv ("HOME")) == NULL)
{
if ((ptr = getenv ("LOGNAME")) != NULL
|| (ptr = getenv ("USER")) != NULL)
pw = getpwnam (ptr);
else
pw = getpwuid (getuid ());
if (pw)
ptr = pw->pw_dir;
}
if (ptr == NULL)
return xstrdup ("/");
copy = xmalloc (strlen (ptr) + 2);
strcpy (copy, ptr);
return strcat (copy, "/");
}
/* 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 any %-escapes. */
char *home = gethomedir ();
db = search_magic_path (home, class, "%L/%N");
if (! db)
db = search_magic_path (home, class, "%N");
xfree (home);
}
return db;
}
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
{
char *home;
char *xdefault;
home = gethomedir ();
xdefault = xmalloc (strlen (home) + sizeof ".Xdefaults");
strcpy (xdefault, home);
strcat (xdefault, ".Xdefaults");
db = XrmGetFileDatabase (xdefault);
xfree (home);
xfree (xdefault);
}
#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;
char *path = 0;
if ((p = getenv ("XENVIRONMENT")) == NULL)
{
static char const xdefaults[] = ".Xdefaults-";
char *home = gethomedir ();
char const *host = SSDATA (Vsystem_name);
ptrdiff_t pathsize = (strlen (home) + sizeof xdefaults
+ SBYTES (Vsystem_name));
path = xrealloc (home, pathsize);
strcat (strcat (path, xdefaults), host);
p = path;
}
db = XrmGetFileDatabase (p);
xfree (path);
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];
#if defined USE_MOTIF || !defined HAVE_XFT || !defined USE_LUCID
const char *helv = "-*-helvetica-medium-r-*--*-120-*-*-*-*-iso8859-1";
#endif
#ifdef USE_MOTIF
const char *courier = "-*-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-1";
#endif
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 ("");
/* Add some font defaults. If the font `helv' doesn't exist, widgets
will use some other default font. */
#ifdef USE_MOTIF
sprintf (line, "%s.pane.background: grey75", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fontList: %s", myclass, helv);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*menu*background: grey75", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*menubar*background: grey75", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*verticalScrollBar.background: grey75", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*verticalScrollBar.troughColor: grey75", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s.dialog*.background: grey75", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb.Text.background: white", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb.FilterText.background: white", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb*DirList.background: white", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb*ItemsList.background: white", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb*background: grey75", myclass);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb.Text.fontList: %s", myclass, courier);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb.FilterText.fontList: %s", myclass, courier);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb*ItemsList.fontList: %s", myclass, courier);
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb*DirList.fontList: %s", myclass, courier);
XrmPutLineResource (&rdb, line);
/* Set double click time of list boxes in the file selection
dialog from `double-click-time'. */
if (INTEGERP (Vdouble_click_time) && XINT (Vdouble_click_time) > 0)
{
sprintf (line, "%s*fsb*DirList.doubleClickInterval: %"pI"d",
myclass, XFASTINT (Vdouble_click_time));
XrmPutLineResource (&rdb, line);
sprintf (line, "%s*fsb*ItemsList.doubleClickInterval: %"pI"d",
myclass, XFASTINT (Vdouble_click_time));
XrmPutLineResource (&rdb, line);
}
#else /* not USE_MOTIF */
sprintf (line, "Emacs.dialog*.background: grey75");
XrmPutLineResource (&rdb, line);
#if !defined (HAVE_XFT) || !defined (USE_LUCID)
sprintf (line, "Emacs.dialog*.font: %s", helv);
XrmPutLineResource (&rdb, line);
sprintf (line, "*XlwMenu*font: %s", helv);
XrmPutLineResource (&rdb, line);
#endif
sprintf (line, "*XlwMenu*background: grey75");
XrmPutLineResource (&rdb, line);
sprintf (line, "Emacs*verticalScrollBar.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))
{
if (type == x_rm_string)
ret_value->addr = (char *) value.addr;
else
memcpy (ret_value->addr, value.addr, ret_value->size);
return value.size;
}
return 0;
}
/* Retrieve the string resource specified by NAME with CLASS from
database RDB. */
char *
x_get_string_resource (XrmDatabase rdb, const char *name, const char *class)
{
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 (char *) value.addr;
return 0;
}
/* Stand-alone test facilities. */
#ifdef TESTRM
typedef char **List;
#define arg_listify(len, list) (list)
#define car(list) (*(list))
#define cdr(list) (list + 1)
#define NIL(list) (! *(list))
#define free_arglist(list)
static List
member (char *elt, List list)
{
List p;
for (p = list; ! NIL (p); p = cdr (p))
if (! strcmp (elt, car (p)))
return p;
return p;
}
static void
fatal (char *msg, char *prog)
{
fprintf (stderr, msg, prog);
exit (1);
}
int
main (int argc, char **argv)
{
Display *display;
char *displayname, *resource_string, *class, *name;
XrmDatabase xdb;
List arg_list, lp;
arg_list = arg_listify (argc, argv);
lp = member ("-d", arg_list);
if (!NIL (lp))
displayname = car (cdr (lp));
else
displayname = "localhost:0.0";
lp = member ("-xrm", arg_list);
resource_string = NIL (lp) ? 0 : car (cdr (lp));
lp = member ("-c", arg_list);
if (! NIL (lp))
class = car (cdr (lp));
else
class = "Emacs";
lp = member ("-n", arg_list);
if (! NIL (lp))
name = car (cdr (lp));
else
name = "emacs";
free_arglist (arg_list);
if (!(display = XOpenDisplay (displayname)))
fatal ("Can't open display '%s'\n", XDisplayName (displayname));
xdb = x_load_resources (display, resource_string, name, class);
/* In a real program, you'd want to also do this: */
display->db = xdb;
while (1)
{
char query_name[90];
char query_class[90];
printf ("Name: ");
gets (query_name);
if (strlen (query_name))
{
char *value;
printf ("Class: ");
gets (query_class);
value = x_get_string_resource (xdb, query_name, query_class);
if (value != NULL)
printf ("\t%s(%s): %s\n\n", query_name, query_class, value);
else
printf ("\tNo Value.\n\n");
}
else
break;
}
printf ("\tExit.\n\n");
XCloseDisplay (display);
return 0;
}
#endif /* TESTRM */
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