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/* A general interface to the widgets of different toolkits.
Copyright (C) 1992, 1993 Lucid, Inc.
This file is part of the Lucid Widget Library.
The Lucid Widget Library 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 2, or (at your option)
any later version.
The Lucid Widget Library 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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* This code reads a resource database file and filters it through cpp
with the same set of preprocessor defines that `xrdb' uses.
Call lwlib_xrdb_initialize(dpy) once, and then call the function
lwlib_GetFileDatabase() instead of XrmGetFileDatabase(),
and lwlib_CombineFileDatabase() instead of XrmCombineFileDatabase().
*/
#ifndef __STDC_EXTENDED__
#define __STDC_EXTENDED__
#endif
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <ctype.h>
#include <X11/Xlib.h>
#include <X11/Xos.h>
#include <X11/Intrinsic.h>
#include <X11/Xmu/SysUtil.h>
#include <sys/stat.h>
extern char *index ();
static int
file_p (path)
char *path;
{
struct stat status;
return (access (path, R_OK) == 0 /* exists and is readable */
&& stat (path, &status) == 0 /* get the status */
&& (status.st_mode & S_IFDIR) == 0); /* not a directory */
}
#ifndef CPP_PROGRAM
#define CPP_PROGRAM "/lib/cpp"
#endif
static char cpp_string [BUFSIZ];
static char *cpp_file = 0;
#define Resolution(pixels, mm) ((((pixels) * 100000 / (mm)) + 50) / 100)
void
lwlib_xrdb_initialize (display)
Display *display;
{
Screen *screen;
Visual *visual;
char server [255];
char *colon, *s;
#define Push(str) \
(strncpy (s, str, sizeof(str)), s += (sizeof(str)-1))
#define Print(str, thing) \
(sprintf (s, str, thing), s = index (s, 0))
s = cpp_string;
Push (CPP_PROGRAM);
Push (" -DCLIENTHOST=");
XmuGetHostname (s, sizeof (cpp_string) - (s - cpp_string));
s = index (s, 0);
Push (" -DSERVERHOST=");
strcpy (s, XDisplayName (DisplayString (display)));
colon = index (s, ':');
if (colon == s)
{
XmuGetHostname (s, sizeof (cpp_string) - (s - cpp_string));
s = index (s, 0);
}
else if (colon)
s = colon;
else
s = index (s, 0);
Print (" -DVERSION=%d", ProtocolVersion(display));
Print (" -DREVISION=%d", ProtocolRevision(display));
Print (" -DVENDOR=\"%s\"", ServerVendor(display));
Print (" -DRELEASE=%d", VendorRelease(display));
screen = DefaultScreenOfDisplay(display);
visual = DefaultVisualOfScreen(screen);
Print (" -DWIDTH=%d", screen->width);
Print (" -DHEIGHT=%d", screen->height);
Print (" -DX_RESOLUTION=%d", Resolution(screen->width,screen->mwidth));
Print (" -DY_RESOLUTION=%d", Resolution(screen->height,screen->mheight));
Print (" -DPLANES=%d", DisplayPlanes(display, DefaultScreen(display)));
Print (" -DBITS_PER_RGB=%d", visual->bits_per_rgb);
switch(visual->class) {
case StaticGray: Print (" -DCLASS=%s", "StaticGray"); break;
case GrayScale: Print (" -DCLASS=%s", "GrayScale"); break;
case StaticColor: Print (" -DCLASS=%s", "StaticColor");
Print (" -DCOLOR", 0); break;
case PseudoColor: Print (" -DCLASS=%s", "PseudoColor");
Print (" -DCOLOR", 0); break;
case TrueColor: Print (" -DCLASS=%s", "TrueColor");
Print (" -DCOLOR", 0); break;
case DirectColor: Print (" -DCLASS=%s", "DirectColor");
Print (" -DCOLOR", 0); break;
default:
fprintf (stderr, "unexpected visual class=%d\n", visual->class);
exit (-1);
}
*s++ = ' ';
*s = 0;
cpp_file = s;
}
XrmDatabase
lwlib_GetFileDatabase (path)
char *path;
{
XrmDatabase db = 0;
char line [BUFSIZ];
char *s;
FILE *file;
if (! file_p (path))
return 0;
strcpy (cpp_file, path);
if (! (file = popen (cpp_string, "r")))
{
fprintf (stderr,
"couldn't execute %s; resource file %s file not munged.\n",
CPP_PROGRAM, path);
return XrmGetFileDatabase (path);
}
while (s = fgets (line, sizeof (line), file))
{
char ch, *tail;
if (*s == '!') continue;
for (; ((ch = *s) != '\n') && isspace(ch); s++);
if ((ch == '\0') || (ch == '\n') || (ch == '#')) continue;
tail = s + strlen (s);
if (tail - s < 3) continue; /* this would be syntactically incorrect */
while (*(tail-1) == '\n' && /* handle \ at end of line */
*(tail-2) == '\\')
{
if (! fgets (tail, sizeof (line) - (tail - line), file))
continue;
tail += strlen (tail);
}
XrmPutLineResource (&db, s);
}
pclose (file);
return db;
}
#ifdef THIS_IS_X11R5
int
lwlib_CombineFileDatabase (path, target_db, override)
char *path;
XrmDatabase *target_db;
Bool override;
{
XrmDatabase source_db = lwlib_GetFileDatabase (path);
if (! source_db)
return (! file_p (path));
XrmCombineDatabase (source_db, target_db, override);
return 1;
}
#endif /* r5 */
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