/* main_filter_toolbar.c
 * The filter toolbar
 *
 * $Id: main_filter_toolbar.c 42439 2012-05-05 15:09:19Z morriss $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.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.
 */

/*
 * This file implements the "filter" toolbar for Wireshark.
 */

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

#include <stdio.h>
#include <string.h>

#include <gtk/gtk.h>

#include "ui/recent.h"

#include "ui/gtk/old-gtk-compat.h"

#include "filter_dlg.h"
#include "filter_autocomplete.h"

#include "epan/prefs.h"

#include "keys.h"
#include "gtkglobals.h"
#include "stock_icons.h"

#include "main.h"
#include "menus.h"
#include "main_toolbar.h"
#include "main_filter_toolbar.h"
#include "filter_expression_save_dlg.h"

#define MENU_BAR_PATH_FILE_OPEN                         "/Menubar/FileMenu/Open"
#define MENU_BAR_PATH_EDIT_COPY_AS_FLT                  "/Menubar/EditMenu/Copy/AsFilter"
#define MENU_BAR_PATH_ANALYZE_DISPLAY_FLT               "/Menubar/AnalyzeMenu/DisplayFilters"
#define MENU_BAR_PATH_ANALYZE_FOLLOW_TCP_STREAM         "/Menubar/AnalyzeMenu/FollowTCPStream"
#define MENU_BAR_PATH_ANALYZE_FOLLOW_UDP_STREAM         "/Menubar/AnalyzeMenu/FollowUDPStream"
#define MENU_BAR_PATH_ANALYZE_FOLLOW_SSL_STREAM         "/Menubar/AnalyzeMenu/FollowSSLStream"
#define MENU_BAR_PATH_ANALYZE_APL_AS_FLT_SEL            "/Menubar/AnalyzeMenu/ApplyAsFilter/Selected"
#define MENU_BAR_PATH_ANALYZE_APL_AS_FLT_NOT_SEL        "/Menubar/AnalyzeMenu/ApplyAsFilter/NotSelected"
#define MENU_BAR_PATH_ANALYZE_APL_AS_FLT_AND_SEL        "/Menubar/AnalyzeMenu/ApplyAsFilter/AndSelected"
#define MENU_BAR_PATH_ANALYZE_APL_AS_FLT_OR_SEL         "/Menubar/AnalyzeMenu/ApplyAsFilter/OrSelected"
#define MENU_BAR_PATH_ANALYZE_APL_AS_FLT_AND_NOT_SEL    "/Menubar/AnalyzeMenu/ApplyAsFilter/AndNotSelected"
#define MENU_BAR_PATH_ANALYZE_APL_AS_FLT_OR_NOT_SEL     "/Menubar/AnalyzeMenu/ApplyAsFilter/OrNotSelected"
#define MENU_BAR_PATH_ANALYZE_PREP_A_FLT_SEL            "/Menubar/AnalyzeMenu/PrepareaFilter/Selected"
#define MENU_BAR_PATH_ANALYZE_PREP_A_FLT_NOT_SEL        "/Menubar/AnalyzeMenu/PrepareaFilter/NotSelected"
#define MENU_BAR_PATH_ANALYZE_PREP_A_FLT_AND_SEL        "/Menubar/AnalyzeMenu/PrepareaFilter/AndSelected"
#define MENU_BAR_PATH_ANALYZE_PREP_A_FLT_OR_SEL         "/Menubar/AnalyzeMenu/PrepareaFilter/OrSelected"
#define MENU_BAR_PATH_ANALYZE_PREP_A_FLT_AND_NOT_SEL    "/Menubar/AnalyzeMenu/PrepareaFilter/AndNotSelected"
#define MENU_BAR_PATH_ANALYZE_PREP_A_FLT_OR_NOT_SEL     "/Menubar/AnalyzeMenu/PrepareaFilter/OrNotSelected"

GtkWidget   *main_display_filter_widget=NULL;

/* Run the current display filter on the current packet set, and
   redisplay. */
static void
filter_activate_cb(GtkWidget *w _U_, gpointer data)
{
    const char *s;

    s = gtk_entry_get_text(GTK_ENTRY(data));
    main_filter_packets(&cfile, s, FALSE);
}

/* Enable both Clear and Apply button when filter is changed */
static void
filter_changed_cb(GtkWidget *w _U_, gpointer data)
{
    gtk_widget_set_sensitive (g_object_get_data (G_OBJECT(data), E_DFILTER_APPLY_KEY), TRUE);
    gtk_widget_set_sensitive (g_object_get_data (G_OBJECT(data), E_DFILTER_CLEAR_KEY), TRUE);
    gtk_widget_set_sensitive (g_object_get_data (G_OBJECT(data), E_DFILTER_SAVE_KEY), TRUE);
}

/* redisplay with no display filter */
static void
filter_reset_cb(GtkWidget *w, gpointer data _U_)
{
    GtkWidget *filter_te = NULL;

    if ((filter_te = g_object_get_data(G_OBJECT(w), E_DFILTER_TE_KEY))) {
        gtk_entry_set_text(GTK_ENTRY(filter_te), "");
    }
    main_filter_packets(&cfile, NULL, FALSE);
}

static void
filter_save_cb(GtkWidget *w _U_, GtkWindow *parent_w)
{
    filter_expression_save_dlg(parent_w);
}


GtkWidget *
filter_toolbar_new(void)
{
    GtkWidget     *filter_cm;
    GtkWidget     *filter_te;
    GtkWidget     *filter_tb;
    GtkToolItem   *filter_bt, *filter_add_expr_bt, *filter_reset;
    GtkToolItem   *filter_apply, *filter_save, *item;


    /* Display filter construct dialog has an Apply button, and "OK" not
       only sets our text widget, it activates it (i.e., it causes us to
       filter the capture). */
    static construct_args_t args = {
        "Wireshark: Display Filter",
        TRUE,
        TRUE,
        FALSE
    };

    /* filter toolbar */
    filter_tb = gtk_toolbar_new();
    gtk_orientable_set_orientation(GTK_ORIENTABLE(filter_tb),
                                   GTK_ORIENTATION_HORIZONTAL);

    g_object_set_data(G_OBJECT(top_level), E_TB_FILTER_KEY, filter_tb);
    gtk_widget_show(filter_tb);

    /* Create the "Filter:" button */
    filter_bt = gtk_tool_button_new_from_stock (WIRESHARK_STOCK_DISPLAY_FILTER_ENTRY);
    g_signal_connect(filter_bt, "clicked", G_CALLBACK(display_filter_construct_cb), &args);
    gtk_widget_show(GTK_WIDGET (filter_bt));
    g_object_set_data(G_OBJECT(top_level), E_FILT_BT_PTR_KEY, filter_bt);

    gtk_toolbar_insert(GTK_TOOLBAR(filter_tb),
                       filter_bt,
                       -1);
    gtk_widget_set_tooltip_text(GTK_WIDGET(filter_bt), "Open the \"Display Filter\" dialog, to edit/apply filters");

    /* Create the filter combobox */
    filter_cm = gtk_combo_box_text_new_with_entry ();
    filter_te = gtk_bin_get_child(GTK_BIN(filter_cm));
    main_display_filter_widget=filter_te;
    g_object_set_data(G_OBJECT(filter_bt), E_FILT_TE_PTR_KEY, filter_te);
    g_object_set_data(G_OBJECT(filter_te), E_DFILTER_CM_KEY, filter_cm);
    g_object_set_data(G_OBJECT(top_level), E_DFILTER_CM_KEY, filter_cm);
    g_signal_connect(filter_te, "activate", G_CALLBACK(filter_activate_cb), filter_te);
    g_signal_connect(filter_te, "changed", G_CALLBACK(filter_changed_cb), filter_cm);
    g_signal_connect(filter_te, "changed", G_CALLBACK(filter_te_syntax_check_cb), NULL);
    g_object_set_data(G_OBJECT(filter_tb), E_FILT_AUTOCOMP_PTR_KEY, NULL);
    g_object_set_data(G_OBJECT(filter_te), E_FILT_FIELD_USE_STATUSBAR_KEY, "");
    g_signal_connect(filter_te, "key-press-event", G_CALLBACK (filter_string_te_key_pressed_cb), NULL);
    g_signal_connect(filter_tb, "key-press-event", G_CALLBACK (filter_parent_dlg_key_pressed_cb), NULL);

    gtk_widget_set_size_request(filter_cm, 400, -1);
    gtk_widget_show(filter_cm);
    item = gtk_tool_item_new ();
    gtk_container_add (GTK_CONTAINER (item), filter_cm);
    gtk_widget_show (GTK_WIDGET (item));

    gtk_toolbar_insert(GTK_TOOLBAR(filter_tb), item, -1);

    /* setting a tooltip for a combobox will do nothing, so add it to the corresponding text entry */
    gtk_widget_set_tooltip_text(filter_cm,
        "Enter a display filter, or choose one of your recently used filters. "
        "The background color of this field is changed by a continuous syntax check "
        "(green is valid, red is invalid, yellow may have unexpected results).");

    /* Create the "Add Expression..." button, to pop up a dialog
       for constructing filter comparison expressions. */
    filter_add_expr_bt = gtk_tool_button_new_from_stock(WIRESHARK_STOCK_ADD_EXPRESSION);
    g_object_set_data(G_OBJECT(filter_tb), E_FILT_FILTER_TE_KEY, filter_te);
    g_signal_connect(filter_add_expr_bt, "clicked", G_CALLBACK(filter_add_expr_bt_cb), filter_tb);
    gtk_widget_show(GTK_WIDGET(filter_add_expr_bt));

    gtk_toolbar_insert(GTK_TOOLBAR(filter_tb),
                       filter_add_expr_bt,
                       -1);

    gtk_widget_set_tooltip_text(GTK_WIDGET(filter_add_expr_bt), "Add an expression to this filter string");

    /* Create the "Clear" button */
    filter_reset = gtk_tool_button_new_from_stock(WIRESHARK_STOCK_CLEAR_EXPRESSION);
    g_object_set_data(G_OBJECT(filter_reset), E_DFILTER_TE_KEY, filter_te);
    g_object_set_data (G_OBJECT(filter_cm), E_DFILTER_CLEAR_KEY, filter_reset);
    g_signal_connect(filter_reset, "clicked", G_CALLBACK(filter_reset_cb), NULL);
    gtk_widget_set_sensitive (GTK_WIDGET(filter_reset), FALSE);
    gtk_widget_show(GTK_WIDGET(filter_reset));
    gtk_toolbar_insert(GTK_TOOLBAR(filter_tb),
                       filter_reset,
                       -1);

    gtk_widget_set_tooltip_text(GTK_WIDGET(filter_reset), "Clear this filter string and update the display");

    /* Create the "Apply" button */
    filter_apply = gtk_tool_button_new_from_stock(WIRESHARK_STOCK_APPLY_EXPRESSION);
    g_object_set_data(G_OBJECT(filter_apply), E_DFILTER_CM_KEY, filter_cm);
    g_object_set_data (G_OBJECT(filter_cm), E_DFILTER_APPLY_KEY, filter_apply);
    g_signal_connect(filter_apply, "clicked", G_CALLBACK(filter_activate_cb), filter_te);
    gtk_widget_set_sensitive (GTK_WIDGET(filter_apply), FALSE);
    gtk_widget_show(GTK_WIDGET(filter_apply));

    gtk_toolbar_insert(GTK_TOOLBAR(filter_tb),
                       filter_apply,
                       -1);

    gtk_widget_set_tooltip_text(GTK_WIDGET(filter_apply), "Apply this filter string to the display");

    /* Create the "Save" button */
    filter_save = gtk_tool_button_new_from_stock(GTK_STOCK_SAVE);
    g_object_set_data(G_OBJECT(filter_save), E_DFILTER_CM_KEY, filter_cm);
    g_object_set_data(G_OBJECT(filter_cm), E_DFILTER_SAVE_KEY, filter_save);
    g_signal_connect(filter_save, "clicked", G_CALLBACK(filter_save_cb), filter_te);
    gtk_widget_set_sensitive (GTK_WIDGET(filter_save), FALSE);
    gtk_widget_show(GTK_WIDGET(filter_save));

    gtk_toolbar_insert(GTK_TOOLBAR(filter_tb),
                       filter_save,
                       -1);

    gtk_widget_set_tooltip_text(GTK_WIDGET(filter_save), "Save this filter string");

    /* Sets the text entry widget pointer as the E_DILTER_TE_KEY data
     * of any widget that ends up calling a callback which needs
     * that text entry pointer */
    set_menu_object_data(MENU_BAR_PATH_FILE_OPEN, E_DFILTER_TE_KEY, filter_te);
    set_menu_object_data(MENU_BAR_PATH_EDIT_COPY_AS_FLT, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_DISPLAY_FLT, E_FILT_TE_PTR_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_FOLLOW_TCP_STREAM, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_FOLLOW_UDP_STREAM, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_FOLLOW_SSL_STREAM, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_APL_AS_FLT_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_APL_AS_FLT_NOT_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_APL_AS_FLT_AND_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_APL_AS_FLT_OR_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_APL_AS_FLT_AND_NOT_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_APL_AS_FLT_OR_NOT_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_PREP_A_FLT_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_PREP_A_FLT_NOT_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_PREP_A_FLT_AND_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_PREP_A_FLT_OR_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_PREP_A_FLT_AND_NOT_SEL, E_DFILTER_TE_KEY,
                         filter_te);
    set_menu_object_data(MENU_BAR_PATH_ANALYZE_PREP_A_FLT_OR_NOT_SEL, E_DFILTER_TE_KEY,
                         filter_te);

    set_toolbar_object_data(E_DFILTER_TE_KEY, filter_te);
    g_object_set_data(G_OBJECT(popup_menu_object), E_DFILTER_TE_KEY, filter_te);

    filter_expression_save_dlg_init(filter_tb, filter_te);

    /* make current preferences effective */
    toolbar_redraw_all();

    return filter_tb;
}

static gboolean
dfilter_entry_match(GtkWidget *filter_cm, char *s, int *index)
{
    GtkTreeModel *model = gtk_combo_box_get_model (GTK_COMBO_BOX(filter_cm));
    GtkTreeIter   iter;
    GValue value = { 0, {{0}}};
    const char *filter_str;
    int i;

    i = -1;
    if (!gtk_tree_model_get_iter_first (model, &iter)) {
        *index = i;
        return FALSE;
    }
    do {
        i++;
        gtk_tree_model_get_value (model, &iter, 0, &value);
        filter_str = g_value_get_string (&value);
        if(filter_str) {
            if(strcmp(s, filter_str) == 0) {
                g_value_unset (&value);
                *index = i;
                return TRUE;
            }
        }
        g_value_unset (&value);
    } while (gtk_tree_model_iter_next (model, &iter));

    *index = i;
    return FALSE;
}

/* add a display filter to the combo box */
/* Note: a new filter string will not replace an old identical one */
static gboolean
dfilter_combo_add(GtkWidget *filter_cm, char *s) {
    int index;

    if(!dfilter_entry_match(filter_cm,s, &index))
         gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT(filter_cm), s);
    g_free(s);

    return TRUE;
}


/* write all non empty display filters (until maximum count)
 * of the combo box GList to the user's recent file */
void
dfilter_recent_combo_write_all(FILE *rf) {
    GtkWidget *filter_cm = g_object_get_data(G_OBJECT(top_level), E_DFILTER_CM_KEY);
    GtkTreeModel *model = gtk_combo_box_get_model (GTK_COMBO_BOX(filter_cm));
    GtkTreeIter   iter;
    GValue value = { 0, {{0}}};
    const char *filter_str;
    guint      max_count = 0;

    if (!gtk_tree_model_get_iter_first (model, &iter))
        return;
    do {
        gtk_tree_model_get_value (model, &iter, 0, &value);
        filter_str = g_value_get_string (&value);
        if(filter_str)
            fprintf (rf, RECENT_KEY_DISPLAY_FILTER ": %s\n", filter_str);
        g_value_unset (&value);

    } while (gtk_tree_model_iter_next (model, &iter)&& (max_count++ < prefs.gui_recent_df_entries_max));

}

/* add a display filter coming from the user's recent file to the dfilter combo box */
gboolean
dfilter_combo_add_recent(gchar *s) {
    GtkWidget *filter_cm = g_object_get_data(G_OBJECT(top_level), E_DFILTER_CM_KEY);
    char      *dup;

    dup = g_strdup(s);

    return dfilter_combo_add(filter_cm, dup);
}

/* call cf_filter_packets() and add this filter string to the recent filter list */
gboolean
main_filter_packets(capture_file *cf, const gchar *dftext, gboolean force)
{
    GtkWidget *filter_cm = g_object_get_data(G_OBJECT(top_level), E_DFILTER_CM_KEY);
    gboolean   free_filter = TRUE;
    char      *s;
    cf_status_t cf_status;

    s = g_strdup(dftext);

    cf_status = cf_filter_packets(cf, s, force);

    if (cf_status == CF_OK) {
        gtk_widget_set_sensitive (g_object_get_data (G_OBJECT(filter_cm), E_DFILTER_APPLY_KEY), FALSE);
        if (!s || strlen (s) == 0) {
            gtk_widget_set_sensitive (g_object_get_data (G_OBJECT(filter_cm), E_DFILTER_CLEAR_KEY), FALSE);
            gtk_widget_set_sensitive (g_object_get_data (G_OBJECT(filter_cm), E_DFILTER_SAVE_KEY), FALSE);
        }
    }

    if (!s)
        return (cf_status == CF_OK);

    /* GtkCombos don't let us get at their list contents easily, so we maintain
       our own filter list, and feed it to gtk_combo_set_popdown_strings when
       a new filter is added. */
    if (cf_status == CF_OK && strlen(s) > 0) {
        int index;

        if(!dfilter_entry_match(filter_cm,s, &index) || index != 0) {

            /* If the filter is already there but not the first entry, remove it */
            if (index > 0) {
                gtk_combo_box_text_remove(GTK_COMBO_BOX_TEXT(filter_cm), index);
                index--;
            }

            /* Add the filter (at the head of the list) */
            gtk_combo_box_text_prepend_text(GTK_COMBO_BOX_TEXT(filter_cm), s);
            index++;
        }

        /* If we have too many entries, remove some */
        while ((guint)index >= prefs.gui_recent_df_entries_max) {
            gtk_combo_box_text_remove(GTK_COMBO_BOX_TEXT(filter_cm), index);
            index--;
        }
    }
    if (free_filter)
        g_free(s);

    return (cf_status == CF_OK);
}