path: root/gtk/filter_prefs.c

/* filter_prefs.c
 * Dialog boxes for filter editing
 * (This used to be a notebook page under "Preferences", hence the
 * "prefs" in the file name.)
 *
 * $Id: filter_prefs.c,v 1.15 2000/08/07 22:35:14 guy Exp $
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <gerald@zing.org>
 * Copyright 1998 Gerald Combs
 *
 * 
 * This program 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
 * of the License, or (at your option) any later version.
 * 
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <gtk/gtk.h>

#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <ctype.h>
#ifdef HAVE_DIRECT_H
#include <direct.h>
#endif

#include "gtk/main.h"
#include "filter_prefs.h"
#include "packet.h"
#include "file.h"
#include "util.h"
#include "dlg_utils.h"
#include "ui_util.h"
#include "prefs_dlg.h"

#define E_FILT_NAME_KEY "filter_name"
#define E_FILT_LBL_KEY  "filter_label"
#define E_FILT_CM_KEY   "in_cancel_mode"
#define E_FILTER_WIDGET_KEY "filter_widget"

typedef struct _filter_def {
  char *name;
  char *strval;
} filter_def;

typedef struct _filter_cb_data {
  GList     *fl;
  GtkWidget *win;
} filter_cb_data;


static GtkWidget   *filter_l, *chg_bt, *copy_bt, *del_bt, *name_te, *filter_te, *apply_bt;
static GList       *fl = NULL;

static void get_filter_list(void);
static GtkWidget *filter_dialog_new(GtkWidget *caller, GtkWidget *filter_te,
    gboolean wants_apply_button);
static void filter_dlg_ok(GtkWidget *ok_bt, gpointer parent_w);
static void filter_dlg_save(GtkWidget *save_bt, gpointer parent_w);
static void filter_dlg_cancel(GtkWidget *cancel_bt, gpointer parent_w);
static void filter_dlg_destroy(GtkWidget *win, gpointer data);
static void filter_sel_apply_cb(GtkWidget *cancel_bt, gpointer parent_w);

static GtkWidget *filter_prefs_show(GtkWidget *, gboolean);
static void       filter_sel_list_cb(GtkWidget *, gpointer);
static void       filter_sel_new_cb(GtkWidget *, gpointer);
static void       filter_sel_chg_cb(GtkWidget *, gpointer);
static void       filter_sel_copy_cb(GtkWidget *, gpointer);
static void       filter_sel_del_cb(GtkWidget *, gpointer);
static void       filter_prefs_ok(GtkWidget *);
static void       filter_prefs_save(GtkWidget *);
static void       filter_prefs_cancel(GtkWidget *);
static void       filter_prefs_delete(GtkWidget *);

#define	FILTER_LINE_SIZE	2048

static void
get_filter_list(void)
{
  filter_def *filt;
  FILE       *ff;
  gchar      *ff_path, *ff_name = PF_DIR "/filters", f_buf[FILTER_LINE_SIZE];
  gchar      *name_begin, *name_end, *filt_begin;
  int         len, line = 0;

  if (fl) return;
  
  /* To do: generalize this */
  ff_path = (gchar *) g_malloc(strlen(get_home_dir()) + strlen(ff_name) +  4);
  sprintf(ff_path, "%s/%s", get_home_dir(), ff_name);

  if ((ff = fopen(ff_path, "r")) == NULL) {
    g_free(ff_path);
    return;
  }

  while (fgets(f_buf, FILTER_LINE_SIZE, ff)) {
    line++;
    len = strlen(f_buf);
    if (f_buf[len - 1] == '\n') {
      len--;
      f_buf[len] = '\0';
    }
    name_begin = strchr(f_buf, '"');
    /* Empty line */
    if (name_begin == NULL)
      continue;
    name_end = strchr(name_begin + 1, '"');
    /* No terminating quote */
    if (name_end == NULL) {
      g_warning("Malformed filter in '%s' line %d.", ff_path, line);
      continue;
    }
    name_begin++;
    name_end[0] = '\0';
    filt_begin  = name_end + 1;
    while(isspace((guchar)filt_begin[0])) filt_begin++;
    /* No filter string */
    if (filt_begin[0] == '\0') {
      g_warning("Malformed filter in '%s' line %d.", ff_path, line);
      continue;
    }
    filt         = (filter_def *) g_malloc(sizeof(filter_def));
    filt->name   = g_strdup(name_begin);
    filt->strval = g_strdup(filt_begin);
    fl = g_list_append(fl, filt);
  }
  fclose(ff);
  g_free(ff_path);
}

/* XXX - we can have one global dialog box for editing, and a bunch
   of dialog boxes associated with browse buttons; we want the dialog
   boxes associated with browse buttons to at least let you save the
   current filter, so they have to allow editing; however, how do we
   arrange that if a change is made to the filter list, other dialog
   boxes get updated appropriately? */

/* Create a filter dialog for browsing; this is to be used as a callback
   for a button next to a text entry box, which, when clicked, allows
   you to browse through the list of filters to select one to be put
   into the text entry box, and, if you select a filter with this
   dialog box, enters the text of the filter into a text entry box
   associated with the button.

   If "wants_apply_button" is non-null, hitting <Enter> in the text entry
   box causes the filter in that box to be applied to something, so
   the filter dialog should have an "Apply" button that causes the
   selected filter to be put into the text entry box and the text
   entry box activated; otherwise, no "Apply" button need apply. */
void
filter_browse_cb(GtkWidget *w, gpointer wants_apply_button)
{
	GtkWidget *caller = gtk_widget_get_toplevel(w);
	GtkWidget *filter_browse_w;
	GtkWidget *filter_te;

	/* Has a filter dialog box already been opened for that top-level
	   widget? */
	filter_browse_w = gtk_object_get_data(GTK_OBJECT(caller),
	    E_FILT_DIALOG_PTR_KEY);

	if (filter_browse_w != NULL) {
		/* Yes.  Just re-activate that dialog box. */
		reactivate_window(filter_browse_w);
		return;
	}

	/* No.  Get the text entry attached to the button. */
	filter_te = gtk_object_get_data(GTK_OBJECT(w), E_FILT_TE_PTR_KEY);

	/* Now create a new dialog. */
	filter_browse_w = filter_dialog_new(caller, filter_te,
	    (wants_apply_button != NULL));

	/* Set the E_FILT_CALLER_PTR_KEY for the new dialog to point to
	   our caller. */
	gtk_object_set_data(GTK_OBJECT(filter_browse_w), E_FILT_CALLER_PTR_KEY,
	    caller);

	/* Set the E_FILT_DIALOG_PTR_KEY for the caller to point to us */
	gtk_object_set_data(GTK_OBJECT(caller), E_FILT_DIALOG_PTR_KEY,
	    filter_browse_w);
}

static GtkWidget *global_filter_w;

/* Create a filter dialog for editing; this is to be used as a callback
   for menu items, toolbars, etc.. */
void
filter_dialog_cb(GtkWidget *w)
{
	GtkWidget *filter_te;

	/* Has a filter dialog box already been opened for editing? */
	if (global_filter_w != NULL) {
		/* Yes.  Just reactivate it. */
		reactivate_window(global_filter_w);
		return;
	}

	/* No.  Create one. */
	/* But first, get the text entry attached to the button. */
	filter_te = gtk_object_get_data(GTK_OBJECT(w), E_FILT_TE_PTR_KEY);
	global_filter_w = filter_dialog_new(NULL, filter_te, TRUE);
}

static GtkWidget *
filter_dialog_new(GtkWidget *caller, GtkWidget *filter_te,
    gboolean wants_apply_button)
{
	GtkWidget	*main_w,	/* main window */
			*main_vb,	/* main container */
			*bbox, 		/* button container */
			*ok_bt, 	/* ok button */
			*save_bt, 	/* save button */
			*cancel_bt;	/* cancel button */ 
	GtkWidget *filter_pg = NULL;	/* filter settings box */

	main_w = dlg_window_new();
	gtk_window_set_title(GTK_WINDOW(main_w), "Ethereal: Filters");

	/* Call a handler when we're destroyed, so we can inform
	   our caller, if any, that we've been destroyed. */
	gtk_signal_connect(GTK_OBJECT(main_w), "destroy",
	    GTK_SIGNAL_FUNC(filter_dlg_destroy), NULL);

	main_vb = gtk_vbox_new(FALSE, 5);
	gtk_container_border_width(GTK_CONTAINER(main_vb), 5);
	gtk_container_add(GTK_CONTAINER(main_w), main_vb);
	gtk_widget_show(main_vb);

	filter_pg = filter_prefs_show(filter_te, wants_apply_button);
	gtk_box_pack_start(GTK_BOX(main_vb), filter_pg, TRUE, TRUE, 0);
	gtk_object_set_data(GTK_OBJECT(filter_pg), E_FILT_TE_PTR_KEY, filter_te);
	gtk_object_set_data(GTK_OBJECT(main_w), E_FILTER_WIDGET_KEY, filter_pg);

	bbox = gtk_hbutton_box_new();
	gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), GTK_BUTTONBOX_END);
	gtk_button_box_set_spacing(GTK_BUTTON_BOX(bbox), 5);
	gtk_container_add(GTK_CONTAINER(main_vb), bbox);
	gtk_widget_show(bbox);

	ok_bt = gtk_button_new_with_label ("OK");
	gtk_signal_connect(GTK_OBJECT(ok_bt), "clicked",
		GTK_SIGNAL_FUNC(filter_dlg_ok), GTK_OBJECT(main_w));
	GTK_WIDGET_SET_FLAGS(ok_bt, GTK_CAN_DEFAULT);
	gtk_box_pack_start(GTK_BOX(bbox), ok_bt, TRUE, TRUE, 0);
	gtk_widget_grab_default(ok_bt);
	gtk_widget_show(ok_bt);

	save_bt = gtk_button_new_with_label ("Save");
	gtk_signal_connect(GTK_OBJECT(save_bt), "clicked",
		GTK_SIGNAL_FUNC(filter_dlg_save), GTK_OBJECT(main_w));
	GTK_WIDGET_SET_FLAGS(save_bt, GTK_CAN_DEFAULT);
	gtk_box_pack_start(GTK_BOX(bbox), save_bt, TRUE, TRUE, 0);
	gtk_widget_show(save_bt);

	cancel_bt = gtk_button_new_with_label ("Cancel");
	gtk_signal_connect(GTK_OBJECT(cancel_bt), "clicked",
		GTK_SIGNAL_FUNC(filter_dlg_cancel), GTK_OBJECT(main_w));
	GTK_WIDGET_SET_FLAGS(cancel_bt, GTK_CAN_DEFAULT);
	gtk_box_pack_start(GTK_BOX(bbox), cancel_bt, TRUE, TRUE, 0);
	gtk_widget_show(cancel_bt);

	gtk_widget_show(main_w);

	return main_w;
}

static void
filter_dlg_ok(GtkWidget *ok_bt, gpointer parent_w)
{
	filter_prefs_ok(gtk_object_get_data(GTK_OBJECT(parent_w), E_FILTER_WIDGET_KEY));
	gtk_widget_destroy(GTK_WIDGET(parent_w));
}

static void
filter_dlg_save(GtkWidget *save_bt, gpointer parent_w)
{
	filter_prefs_save(gtk_object_get_data(GTK_OBJECT(parent_w), E_FILTER_WIDGET_KEY));
}

static void
filter_dlg_cancel(GtkWidget *cancel_bt, gpointer parent_w)
{
	filter_prefs_cancel(gtk_object_get_data(GTK_OBJECT(parent_w),  E_FILTER_WIDGET_KEY));
	gtk_widget_destroy(GTK_WIDGET(parent_w));
}

static void
filter_dlg_destroy(GtkWidget *win, gpointer data)
{
	GtkWidget *caller;

	/* Get the widget that requested that we be popped up, if any.
	   (It should arrange to destroy us if it's destroyed, so
	   that we don't get a pointer to a non-existent window here.) */
	caller = gtk_object_get_data(GTK_OBJECT(win), E_FILT_CALLER_PTR_KEY);

	if (caller != NULL) {
		/* Tell it we no longer exist. */
		gtk_object_set_data(GTK_OBJECT(caller), E_FILT_DIALOG_PTR_KEY,
		    NULL);
	} else {
		/* This is an editing dialog popped up from, for example,
		   a menu item; note that we no longer have one. */
		g_assert(win == global_filter_w);
		global_filter_w = NULL;
	}

	/* Now nuke this window. */
	gtk_grab_remove(GTK_WIDGET(win));
	gtk_widget_destroy(GTK_WIDGET(win));
}

/* Create and display the filter selection widgets. */
static GtkWidget *
filter_prefs_show(GtkWidget *w, gboolean wants_apply_button) {
  GtkWidget  *main_vb, *top_hb, *list_bb, *new_bt, *filter_sc,
             *nl_item, *nl_lb, *middle_hb, *name_lb, *bottom_hb,
             *filter_lb;
  GtkWidget  *l_select = NULL;
  GList      *flp = NULL;
  filter_def *filt;
  gchar      *filter_te_str = NULL;

  /* Make sure everything is set up */  
  get_filter_list();
  if (w)
    filter_te_str = gtk_entry_get_text(GTK_ENTRY(w));

  /* Container for each row of widgets */
  main_vb = gtk_vbox_new(FALSE, 5);
  gtk_container_border_width(GTK_CONTAINER(main_vb), 5);
  gtk_widget_show(main_vb);
  gtk_object_set_data(GTK_OBJECT(main_vb), E_FILT_CM_KEY, (gpointer)FALSE);
  
  /* Top row: Filter list and buttons */
  top_hb = gtk_hbox_new(FALSE, 5);
  gtk_container_add(GTK_CONTAINER(main_vb), top_hb);
  gtk_widget_show(top_hb);
  
  list_bb = gtk_vbutton_box_new();
  gtk_button_box_set_layout (GTK_BUTTON_BOX (list_bb), GTK_BUTTONBOX_START);
  gtk_container_add(GTK_CONTAINER(top_hb), list_bb);
  gtk_widget_show(list_bb);

  new_bt = gtk_button_new_with_label ("New");
  gtk_signal_connect(GTK_OBJECT(new_bt), "clicked",
    GTK_SIGNAL_FUNC(filter_sel_new_cb), NULL);
  gtk_container_add(GTK_CONTAINER(list_bb), new_bt);
  gtk_widget_show(new_bt);
  
  chg_bt = gtk_button_new_with_label ("Change");
  gtk_widget_set_sensitive(chg_bt, FALSE);
  gtk_signal_connect(GTK_OBJECT(chg_bt), "clicked",
    GTK_SIGNAL_FUNC(filter_sel_chg_cb), NULL);
  gtk_container_add(GTK_CONTAINER(list_bb), chg_bt);
  gtk_widget_show(chg_bt);
  
  copy_bt = gtk_button_new_with_label ("Copy");
  gtk_widget_set_sensitive(copy_bt, FALSE);
  gtk_signal_connect(GTK_OBJECT(copy_bt), "clicked",
    GTK_SIGNAL_FUNC(filter_sel_copy_cb), NULL);
  gtk_container_add(GTK_CONTAINER(list_bb), copy_bt);
  gtk_widget_show(copy_bt);
  
  del_bt = gtk_button_new_with_label ("Delete");
  gtk_widget_set_sensitive(del_bt, FALSE);
  gtk_signal_connect(GTK_OBJECT(del_bt), "clicked",
    GTK_SIGNAL_FUNC(filter_sel_del_cb), NULL);
  gtk_container_add(GTK_CONTAINER(list_bb), del_bt);
  gtk_widget_show(del_bt);

  if (wants_apply_button) {
    apply_bt = gtk_button_new_with_label("Apply");
    gtk_widget_set_sensitive(apply_bt, FALSE);
    gtk_signal_connect(GTK_OBJECT(apply_bt), "clicked",
      GTK_SIGNAL_FUNC(filter_sel_apply_cb), w);
    gtk_container_add(GTK_CONTAINER(list_bb), apply_bt);
    gtk_widget_show(apply_bt);
  } else
    apply_bt = NULL;

  filter_sc = gtk_scrolled_window_new(NULL, NULL);
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(filter_sc),
    GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
  gtk_widget_set_usize(filter_sc, 250, 150);
  gtk_container_add(GTK_CONTAINER(top_hb), filter_sc);
  gtk_widget_show(filter_sc);

  filter_l = gtk_list_new();
  gtk_list_set_selection_mode(GTK_LIST(filter_l), GTK_SELECTION_SINGLE);
  gtk_signal_connect(GTK_OBJECT(filter_l), "selection_changed",
    GTK_SIGNAL_FUNC(filter_sel_list_cb), main_vb);
  gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(filter_sc),
    filter_l);
  gtk_widget_show(filter_l);

  flp = g_list_first(fl);
  while (flp) {
    filt    = (filter_def *) flp->data;
    nl_lb   = gtk_label_new(filt->name);
    nl_item = gtk_list_item_new();
    gtk_misc_set_alignment (GTK_MISC (nl_lb), 0.0, 0.5);
    gtk_container_add(GTK_CONTAINER(nl_item), nl_lb);
    gtk_widget_show(nl_lb);
    gtk_container_add(GTK_CONTAINER(filter_l), nl_item);
    gtk_widget_show(nl_item);
    gtk_object_set_data(GTK_OBJECT(nl_item), E_FILT_LBL_KEY, nl_lb);
    gtk_object_set_data(GTK_OBJECT(nl_item), E_FILT_NAME_KEY, flp);
 
    if (filter_te_str && filt->strval)
      if (strcmp(filter_te_str, filt->strval) == 0)
        l_select = nl_item;

    flp = flp->next;
  }
  
  /* Middle row: Filter name entry */
  middle_hb = gtk_hbox_new(FALSE, 5);
  gtk_container_add(GTK_CONTAINER(main_vb), middle_hb);
  gtk_widget_show(middle_hb);
  
  name_lb = gtk_label_new("Filter name:");
  gtk_box_pack_start(GTK_BOX(middle_hb), name_lb, FALSE, FALSE, 3);
  gtk_widget_show(name_lb);
  
  name_te = gtk_entry_new();
  gtk_box_pack_start(GTK_BOX(middle_hb), name_te, TRUE, TRUE, 3);
  gtk_widget_show(name_te);

  /* Bottom row: Filter text entry */
  bottom_hb = gtk_hbox_new(FALSE, 5);
  gtk_container_add(GTK_CONTAINER(main_vb), bottom_hb);
  gtk_widget_show(bottom_hb);
  
  filter_lb = gtk_label_new("Filter string:");
  gtk_box_pack_start(GTK_BOX(bottom_hb), filter_lb, FALSE, FALSE, 3);
  gtk_widget_show(filter_lb);
  
  filter_te = gtk_entry_new();
  gtk_box_pack_start(GTK_BOX(bottom_hb), filter_te, TRUE, TRUE, 3);
  gtk_widget_show(filter_te);

  if (l_select)
  {
    gtk_list_select_child(GTK_LIST(filter_l), l_select);
  } else if (filter_te_str && filter_te_str[0]) {
    gtk_entry_set_text(GTK_ENTRY(name_te), "New filter");
    gtk_entry_set_text(GTK_ENTRY(filter_te), filter_te_str);
  }
    
  return(main_vb);
}

static void
filter_sel_list_cb(GtkWidget *l, gpointer data) {
  filter_def *filt;
  gchar      *name = "", *strval = "";
  GList      *sl, *flp;
  GtkObject  *l_item;
  gint        sensitivity = FALSE;

  if (l)
	  sl = GTK_LIST(l)->selection;
  else
	  sl = NULL;
          
  if (sl) {  /* Something was selected */
    l_item = GTK_OBJECT(sl->data);
    flp    = (GList *) gtk_object_get_data(l_item, E_FILT_NAME_KEY);
    if (flp) {
      filt   = (filter_def *) flp->data;
      name   = filt->name;
      strval = filt->strval;
      sensitivity = TRUE;
    }
  }

  /* Did you know that this function is called when the window is destroyed? */
  /* Funny, that. */
  if (!gtk_object_get_data(GTK_OBJECT(data), E_FILT_CM_KEY)) {
    gtk_entry_set_text(GTK_ENTRY(name_te), name);
    gtk_entry_set_text(GTK_ENTRY(filter_te), strval);
    gtk_widget_set_sensitive(chg_bt, sensitivity);
    gtk_widget_set_sensitive(copy_bt, sensitivity);
    gtk_widget_set_sensitive(del_bt, sensitivity);
    if (apply_bt != NULL)
      gtk_widget_set_sensitive(apply_bt, sensitivity);
  }
}

/* To do: add input checking to each of these callbacks */
 
static void
filter_sel_new_cb(GtkWidget *w, gpointer data) {
  filter_def *filt;
  gchar      *name, *strval;
  GtkWidget  *nl_item, *nl_lb;
  
  name   = gtk_entry_get_text(GTK_ENTRY(name_te));
  strval = gtk_entry_get_text(GTK_ENTRY(filter_te));
  
  if (strlen(name) > 0 && strlen(strval) > 0) {
    filt         = (filter_def *) g_malloc(sizeof(filter_def));
    filt->name   = g_strdup(name);
    filt->strval = g_strdup(strval);
    fl           = g_list_append(fl, filt);
    nl_lb        = gtk_label_new(filt->name);
    nl_item      = gtk_list_item_new();
    gtk_misc_set_alignment (GTK_MISC (nl_lb), 0.0, 0.5);
    gtk_container_add(GTK_CONTAINER(nl_item), nl_lb);
    gtk_widget_show(nl_lb);
    gtk_container_add(GTK_CONTAINER(filter_l), nl_item);
    gtk_widget_show(nl_item);
    gtk_object_set_data(GTK_OBJECT(nl_item), E_FILT_LBL_KEY, nl_lb);
    gtk_object_set_data(GTK_OBJECT(nl_item), E_FILT_NAME_KEY, g_list_last(fl));
    gtk_list_select_child(GTK_LIST(filter_l), nl_item);
  }
}

static void
filter_sel_chg_cb(GtkWidget *w, gpointer data) {
  filter_def *filt;
  gchar      *name = "", *strval = "";
  GList      *sl, *flp;
  GtkObject  *l_item;
  GtkLabel   *nl_lb;

  sl     = GTK_LIST(filter_l)->selection;
  name   = gtk_entry_get_text(GTK_ENTRY(name_te));
  strval = gtk_entry_get_text(GTK_ENTRY(filter_te));

  if (sl) {  /* Something was selected */
    l_item = GTK_OBJECT(sl->data);
    flp    = (GList *) gtk_object_get_data(l_item, E_FILT_NAME_KEY);
    nl_lb  = (GtkLabel *) gtk_object_get_data(l_item, E_FILT_LBL_KEY);
    if (flp && nl_lb) {
      filt = (filter_def *) flp->data;
      
      if (strlen(name) > 0 && strlen(strval) > 0 && filt) {
        g_free(filt->name);
        g_free(filt->strval);
        filt->name   = g_strdup(name);
        filt->strval = g_strdup(strval);
        gtk_label_set(nl_lb, filt->name);
      }
    }
  }
}

static void
filter_sel_copy_cb(GtkWidget *w, gpointer data) {
  GList      *sl, *flp;
  filter_def *filt, *nfilt;
  gchar      *prefix = "Copy of ";
  GtkObject  *l_item;
  GtkWidget  *nl_item, *nl_lb;
  
  sl     = GTK_LIST(filter_l)->selection;
  if (sl) {  /* Something was selected */
    l_item = GTK_OBJECT(sl->data);
    flp    = (GList *) gtk_object_get_data(l_item, E_FILT_NAME_KEY);
    if (flp) {
      filt          = (filter_def *) flp->data;
      nfilt         = (filter_def *) g_malloc(sizeof(filter_def));
      nfilt->name   = g_malloc(strlen(prefix) + strlen(filt->name) + 1);
      sprintf(nfilt->name, "%s%s", prefix, filt->name);
      nfilt->strval = g_strdup(filt->strval);
      fl            = g_list_append(fl, nfilt);
      nl_lb         = gtk_label_new(nfilt->name);
      nl_item       = gtk_list_item_new();
      gtk_misc_set_alignment (GTK_MISC (nl_lb), 0.0, 0.5);
      gtk_container_add(GTK_CONTAINER(nl_item), nl_lb);
      gtk_widget_show(nl_lb);
      gtk_container_add(GTK_CONTAINER(filter_l), nl_item);
      gtk_widget_show(nl_item);
      gtk_object_set_data(GTK_OBJECT(nl_item), E_FILT_LBL_KEY, nl_lb);
      gtk_object_set_data(GTK_OBJECT(nl_item), E_FILT_NAME_KEY, g_list_last(fl));
      gtk_list_select_child(GTK_LIST(filter_l), nl_item);
    }
  }
}

static void
filter_sel_del_cb(GtkWidget *w, gpointer data) {
  GList      *sl, *flp;
  filter_def *filt;
  GtkObject  *l_item;
  gint        pos;
  
  sl = GTK_LIST(filter_l)->selection;
  if (sl) {  /* Something was selected */
    l_item = GTK_OBJECT(sl->data);
    pos    = gtk_list_child_position(GTK_LIST(filter_l),
      GTK_WIDGET(l_item));
    flp    = (GList *) gtk_object_get_data(l_item, E_FILT_NAME_KEY);
    if (flp) {
      filt = (filter_def *) flp->data;
      g_free(filt->name);
      g_free(filt->strval);
      g_free(filt);
      fl = g_list_remove_link(fl, flp);
      gtk_list_clear_items(GTK_LIST(filter_l), pos, pos + 1);
    } 
  }
}

void
filter_sel_apply_cb(GtkWidget *w, gpointer data)
{
	GList      *flp, *sl;
	GtkObject  *l_item;
	filter_def *filt;
	GtkWidget  *mw_filt = data;
	
	sl = GTK_LIST(filter_l)->selection;
	if (sl != NULL && mw_filt != NULL) {  /* Place something in the filter box. */
		l_item = GTK_OBJECT(sl->data);
		flp    = (GList *) gtk_object_get_data(l_item, E_FILT_NAME_KEY);
		if (flp) {
			filt = (filter_def *) flp->data;
			gtk_entry_set_text(GTK_ENTRY(mw_filt), filt->strval);
			gtk_signal_emit_by_name(GTK_OBJECT(mw_filt), "activate");
		}
	}
}

static void
filter_prefs_ok(GtkWidget *w) {
  GList      *flp, *sl;
  GtkObject  *l_item;
  filter_def *filt;
  GtkWidget  *mw_filt = gtk_object_get_data(GTK_OBJECT(w), E_FILT_TE_PTR_KEY);

  sl = GTK_LIST(filter_l)->selection;
  if (sl && mw_filt) {  /* Place something in the filter box. */
    l_item = GTK_OBJECT(sl->data);
    flp    = (GList *) gtk_object_get_data(l_item, E_FILT_NAME_KEY);
    if (flp) {
      filt = (filter_def *) flp->data;
      gtk_entry_set_text(GTK_ENTRY(mw_filt), filt->strval);
    }
  }

  filter_prefs_delete(w);
}

static void
filter_prefs_save(GtkWidget *w) {
  GList       *flp;
  filter_def  *filt;
  gchar       *ff_path, *ff_dir = PF_DIR, *ff_name = "filters";
  FILE        *ff;
  struct stat  s_buf;
  
  ff_path = (gchar *) g_malloc(strlen(get_home_dir()) + strlen(ff_dir) +  
    strlen(ff_name) + 4);
  sprintf(ff_path, "%s/%s", get_home_dir(), ff_dir);

  if (stat(ff_path, &s_buf) != 0)
#ifdef WIN32
    mkdir(ff_path);
#else
    mkdir(ff_path, 0755);
#endif
    
  sprintf(ff_path, "%s/%s/%s", get_home_dir(), ff_dir, ff_name);

  if ((ff = fopen(ff_path, "w")) != NULL) {
    flp = g_list_first(fl);
    while (flp) {
      filt = (filter_def *) flp->data;
      fprintf(ff, "\"%s\" %s\n", filt->name, filt->strval);
      flp = flp->next;
    }
    fclose(ff);
  }

  g_free(ff_path);
}

static void
filter_prefs_cancel(GtkWidget *w) {

  filter_prefs_delete(w);
}

static void
filter_prefs_delete(GtkWidget *w) {
 
  /* Let the list cb know we're about to destroy the widget tree, so it */
  /* doesn't operate on widgets that don't exist. */  
  gtk_object_set_data(GTK_OBJECT(w), E_FILT_CM_KEY, (gpointer)TRUE);
  gtk_widget_destroy(GTK_WIDGET(w));
}