first implementation of the packet history function

svn path=/trunk/; revision=12460

1 files changed, 182 insertions, 0 deletions

diff --git a/gtk/packet_history.c b/gtk/packet_history.c
new file mode 100644
index 0000000000..77adc36533
--- /dev/null
+++ b/gtk/packet_history.c
@@ -0,0 +1,182 @@
+/* packet_history.c
+ * packet history related functions   2004 Ulf Lamping
+ *
+ * $Id$
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * 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 <stdio.h>
+
+#include "file.h"
+#include "globals.h"
+
+#include "menu.h"
+#include "packet_history.h"
+
+
+GList *history_current = NULL;
+GList *history_list = NULL;
+gboolean ignore_jump = FALSE;
+
+
+#if 0
+/* print the complete packet history to console */
+static void history_print(void) {
+    GList *current = g_list_first(history_list);
+
+    printf(" List:\n");
+
+    while(current) {
+        if(current == history_current) {
+            printf(" Row: %u *\n", GPOINTER_TO_INT(current->data));
+        } else {
+            printf(" Row: %u\n", GPOINTER_TO_INT(current->data));
+        }
+        current = g_list_next(current);
+    }
+}
+#endif
+
+
+/* adjust menu and toolbar sensitivity depending on the history entries */
+static void adjust_menus(void) {
+
+    if(history_current) {
+        set_menus_for_packet_history(
+            (gboolean) g_list_previous(history_current), 
+            (gboolean) g_list_next(history_current));
+    } else {
+        /* we don't have any history */
+        set_menus_for_packet_history(FALSE, FALSE);
+    }
+
+    /* history_print(); */
+}
+
+
+/* clear the history list from the given entry to the end of the list */
+static void clear_list(GList *current) {
+    GList *next_packet;
+
+
+    while(current) {
+        next_packet = g_list_next(current);
+        history_list = g_list_remove(history_list, current->data);
+        current = next_packet;
+    }    
+}
+
+
+/* add an entry to the history list */
+void packet_history_add(gint row) {
+
+    if(ignore_jump) {
+        /* we jumping back and forward in history, so don't change list */
+        return;
+    }
+
+    if (history_current) {
+        /* clear list behind current position */
+        clear_list(g_list_next(history_current));
+
+        /* ignore duplicates */
+        if(GPOINTER_TO_INT(history_current->data) == row) {
+            adjust_menus();
+            return;
+        }
+    }
+
+    /* add row */
+    history_list = g_list_append(history_list, GINT_TO_POINTER(row));
+    history_current = g_list_last(history_list);
+
+    adjust_menus();
+}
+
+
+void packet_history_clear(void) {
+    
+    /* clear "old" list */
+    clear_list(g_list_first(history_current));
+
+    /* add the currently selected first row */
+    packet_history_add(0);
+
+    adjust_menus();
+}
+
+
+void packet_history_back(void) {
+    GList *previous;
+
+    if(history_current) {
+        previous = g_list_previous(history_current);
+
+        /* do we have a previous entry */
+        if(previous) {
+            history_current = previous;
+
+            /* goto that packet but don't change history */
+            ignore_jump = TRUE;
+            goto_frame(&cfile, GPOINTER_TO_INT(previous->data) +1);
+            ignore_jump = FALSE;
+        }
+    }
+
+    adjust_menus();
+}
+
+
+void packet_history_forward(void) {
+    GList *next;
+
+    if(history_current) {
+        next = g_list_next(history_current);
+
+        /* do we have a forward entry? */
+        if(next) {
+            history_current = next;
+
+            /* goto that packet but don't change history */
+            ignore_jump = TRUE;
+            goto_frame(&cfile, GPOINTER_TO_INT(next->data) +1);
+            ignore_jump = FALSE;
+        }
+    }
+
+    adjust_menus();
+}
+
+
+void history_forward_cb(GtkWidget *widget _U_, gpointer data _U_) {
+    packet_history_forward();
+}
+
+
+void history_back_cb(GtkWidget *widget _U_, gpointer data _U_) {
+    packet_history_back();
+}
+