/***************************************************************************/
/***************************************************************************/
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/*   (c) 1995-1999.  The Regents of the University of California.  All     */
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/***************************************************************************/
/***************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <Xm/Xm.h>
#include "xdir.h"

#define PREFSFILE  ".xdirrc"

int need_to_save_prefs = False;

static char *prefs_file;


/*
 * construct_prefs_filename - Form preferences file name by concatenating
 *                            .xdirrc to $HOME.
 */
void
construct_prefs_filename()
{
	char *homedir = getenv("HOME");

	prefs_file = XtMalloc(strlen(homedir)+strlen(PREFSFILE)+2);
	strcpy(prefs_file, homedir);
	strcat(prefs_file, "/");
	strcat(prefs_file, PREFSFILE);
}


/*
 * read_prefs_from_file - Initialize preferences with values from a disk file.
 */
void
read_prefs_from_file()
{
	static FILE *fp;
	int new_prefs;

	/* Try to open preferences file */
	fp = fopen(prefs_file, "r");     /* Note: fp might be null */

	/* Read general preferences */
	new_prefs = read_gprefs_from_file(fp);

	/* Read viewer preferences */
	if (fp)
		rewind(fp);
	read_vprefs_from_file(fp);

	/* Read launcher preferences */
	if (fp)
		rewind(fp);
	read_lprefs_from_file(fp);

	/* Read firewall preferences */
	if (fp)
		rewind(fp);
	read_fprefs_from_file(fp);

	/* Close file */
	if (fp)
		fclose(fp);

	/* If new user prefs added by programmer, save prefs */
	if (new_prefs && save_prefs())
		fatal_error("Unable to save user preferences.");
}


/*
 * save_prefs - Write user, viewer and launcher preferences to .xdirrc.
 *              Returns 0 if successful, else -1.
 */
save_prefs()
{
	FILE *fp;

	/* Try to create preferences file */
	if ((fp = fopen(prefs_file, "w")) == NULL)
		return -1;

	/* Now save the preferences */
	save_gprefs(fp);
	save_vprefs(fp);
	save_lprefs(fp);
	save_fprefs(fp);

	/* Clean up */
	fclose(fp);
	need_to_save_prefs = False;
	return 0;
}


/*
 * cb_save_prefs - Callback that saves current preferences to a disk file.
 */
void
cb_save_prefs(widget, client_data, call_data)
Widget widget;
XtPointer client_data;
XtPointer call_data;
{
	struct dirwin_st *dirwin = (struct dirwin_st *)client_data;

	/* Clear error flag */
	raise_okflag();

	if (save_prefs())
		warn("Unable to save preferences.", dirwin->w_shell);
}