/* file_dlg.c
 * Utilities to use when constructing file selection dialogs
 *
 * $Id: file_dlg.c 32076 2010-03-02 00:06:20Z guy $
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <errno.h>

#include <gtk/gtk.h>

#include <epan/filesystem.h>

#include "gtk/gtkglobals.h"
#include "gtk/gui_utils.h"
#include "gtk/file_dlg.h"
#include "gtk/keys.h"


static gchar *last_open_dir = NULL;
static gboolean updated_last_open_dir = FALSE;

static void file_selection_browse_destroy_cb(GtkWidget *win, GtkWidget* file_te);

/* Keys ... */
#define E_FS_CALLER_PTR_KEY       "fs_caller_ptr"

/* Create a file selection dialog box window that belongs to Wireshark's
   main window. */
GtkWidget *
file_selection_new(const gchar *title, file_selection_action_t action)
{
    GtkWidget *win;
    GtkFileChooserAction gtk_action;
#ifdef _WIN32
    char *u3devicedocumentpath;
#endif 
    const gchar *ok_button_text;

    switch (action) {

    case FILE_SELECTION_OPEN:
        gtk_action = GTK_FILE_CHOOSER_ACTION_OPEN;
        ok_button_text = GTK_STOCK_OPEN;
        break;

    case FILE_SELECTION_READ_BROWSE:
        gtk_action = GTK_FILE_CHOOSER_ACTION_OPEN;
        ok_button_text = GTK_STOCK_OK;
        break;

    case FILE_SELECTION_SAVE:
        gtk_action = GTK_FILE_CHOOSER_ACTION_SAVE;
        ok_button_text = GTK_STOCK_SAVE;
        break;

    case FILE_SELECTION_WRITE_BROWSE:
        gtk_action = GTK_FILE_CHOOSER_ACTION_SAVE;
        ok_button_text = GTK_STOCK_OK;
        break;

    case FILE_SELECTION_CREATE_FOLDER:
        gtk_action = GTK_FILE_CHOOSER_ACTION_CREATE_FOLDER;
        ok_button_text = GTK_STOCK_OK;
        break;

    default:
        g_assert_not_reached();
        gtk_action = -1;
        ok_button_text = NULL;
        break;
    }
    win = gtk_file_chooser_dialog_new(title, GTK_WINDOW(top_level), gtk_action,
#ifndef _WIN32
                                      GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                                      ok_button_text, GTK_RESPONSE_ACCEPT,
#else
                                      ok_button_text, GTK_RESPONSE_ACCEPT,
                                      GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
#endif
                                      NULL);

    /* If we've opened a file before, start out by showing the files in the directory
       in which that file resided. */
    if (last_open_dir)
        file_selection_set_current_folder(win, last_open_dir);
#ifdef _WIN32
    else {
        u3devicedocumentpath = getenv_utf8("U3_DEVICE_DOCUMENT_PATH");
        if(u3devicedocumentpath != NULL)
            file_selection_set_current_folder(win, u3devicedocumentpath);

    }
#endif
    return win;
}

/* Set the current folder for a file selection dialog. */
gboolean
file_selection_set_current_folder(GtkWidget *fs, const gchar *filename)
{
    gboolean ret;
    size_t filename_len = strlen(filename);
    gchar *new_filename;

    /* trim filename, so gtk_file_chooser_set_current_folder() likes it, see below */
    if (filename[filename_len -1] == G_DIR_SEPARATOR 
#ifdef _WIN32
        && filename_len > 3)    /* e.g. "D:\" */
#else
        && filename_len > 1)    /* e.g. "/" */
#endif
    {
        new_filename = g_strdup(filename);
        new_filename[filename_len-1] = '\0';
    } else {
        new_filename = g_strdup(filename);
    }

    /* this function is very pedantic about it's filename parameter */
    /* no trailing '\' allowed, unless a win32 root dir "D:\" */
    ret = gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(fs), new_filename);
    g_free(new_filename);
    return ret;
}

/* Set the "extra" widget for a file selection dialog, with user-supplied
   options. */
void
file_selection_set_extra_widget(GtkWidget *fs, GtkWidget *extra)
{
  gtk_file_chooser_set_extra_widget(GTK_FILE_CHOOSER(fs), extra);
}


/*
 * A generic select_file routine that is intended to be connected to
 * a Browse button on other dialog boxes. This allows the user to browse
 * for a file and select it. We fill in the text_entry that is given to us. 
 *
 * We display the window label specified in our args.
 */
void
file_selection_browse(GtkWidget *file_bt, GtkWidget *file_te, const char *label, file_selection_action_t action)
{
    GtkWidget *caller = gtk_widget_get_toplevel(file_bt);
    GtkWidget *fs;
    gchar     *f_name;

    /* Has a file selection dialog box already been opened for that top-level
       widget? */
    fs = g_object_get_data(G_OBJECT(caller), E_FILE_SEL_DIALOG_PTR_KEY);
    if (fs != NULL) {
        /* Yes.  Just re-activate that dialog box. */
        reactivate_window(fs);
        return;
    }

    fs = file_selection_new(label, action);

    g_object_set_data(G_OBJECT(fs), PRINT_FILE_TE_KEY, file_te);

    /* Set the E_FS_CALLER_PTR_KEY for the new dialog to point to our caller. */
    g_object_set_data(G_OBJECT(fs), E_FS_CALLER_PTR_KEY, caller);

    /* Set the E_FILE_SEL_DIALOG_PTR_KEY for the caller to point to us */
    g_object_set_data(G_OBJECT(caller), E_FILE_SEL_DIALOG_PTR_KEY, fs);

    /* Call a handler when the file selection box is destroyed, so we can inform
       our caller, if any, that it's been destroyed. */
    g_signal_connect(fs, "destroy", G_CALLBACK(file_selection_browse_destroy_cb), 
                     file_te);

    if (gtk_dialog_run(GTK_DIALOG(fs)) == GTK_RESPONSE_ACCEPT)
    {
        f_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(fs));
        gtk_entry_set_text(GTK_ENTRY(file_te), f_name);
        g_free(f_name);
    }
    window_destroy(fs);
}


static void
file_selection_browse_destroy_cb(GtkWidget *win, GtkWidget* parent_te)
{
    GtkWidget *caller;

    /* Get the widget that requested that we be popped up.
       (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 = g_object_get_data(G_OBJECT(win), E_FS_CALLER_PTR_KEY);

    /* Tell it we no longer exist. */
    g_object_set_data(G_OBJECT(caller), E_FILE_SEL_DIALOG_PTR_KEY, NULL);

    /* Give the focus to the file text entry widget so the user can just press
       Return to print to the file. */
    gtk_widget_grab_focus(parent_te);
}


void
set_last_open_dir(const char *dirname)
{
    size_t len;
    gchar *new_last_open_dir;

    if (dirname) {
        len = strlen(dirname);
        if (dirname[len-1] == G_DIR_SEPARATOR) {
            new_last_open_dir = g_strconcat(dirname, NULL);
        }
        else {
            new_last_open_dir = g_strconcat(dirname,
                                            G_DIR_SEPARATOR_S, NULL);
        }

        if (last_open_dir == NULL ||
            strcmp(last_open_dir, new_last_open_dir) != 0)
            updated_last_open_dir = TRUE;
    }
    else {
        new_last_open_dir = NULL;
        if (last_open_dir != NULL)
            updated_last_open_dir = TRUE;
    }

    g_free(last_open_dir);
    last_open_dir = new_last_open_dir;
}

char *
get_last_open_dir(void)
{
    return last_open_dir;
}
