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/*
 *  Copyright (C) 2003 Marco Pesenti Gritti
 *  Copyright (C) 2003, 2004 Christian Persch
 *
 *  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, 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.
 *
 *  $Id$
 */

#include "config.h"

#include "ephy-file-chooser.h"
#include "ephy-file-helpers.h"
#include "eel-gconf-extensions.h"
#include "ephy-state.h"
#include "ephy-debug.h"

#include <gtk/gtkstock.h>
#include <libgnomevfs/gnome-vfs-utils.h>
#include <glib/gi18n.h>

#define EPHY_FILE_CHOOSER_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_FILE_CHOOSER, EphyFileChooserPrivate))

struct EphyFileChooserPrivate
{
    char *persist_key;
};

static void ephy_file_chooser_class_init    (EphyFileChooserClass *klass);
static void ephy_file_chooser_init      (EphyFileChooser *dialog);

enum
{
    PROP_0,
    PROP_PERSIST_KEY
};

static GObjectClass *parent_class = NULL;

GType
ephy_file_chooser_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0))
    {
        static const GTypeInfo our_info =
        {
            sizeof (EphyFileChooserClass),
            NULL,
            NULL,
            (GClassInitFunc) ephy_file_chooser_class_init,
            NULL,
            NULL,
            sizeof (EphyFileChooser),
            0,
            (GInstanceInitFunc) ephy_file_chooser_init
        };

        type = g_type_register_static (GTK_TYPE_FILE_CHOOSER_DIALOG,
                           "EphyFileChooser",
                           &our_info, 0);
    }

    return type;
}

static void
current_folder_changed_cb (GtkFileChooser *chooser, EphyFileChooser *dialog)
{
    if (dialog->priv->persist_key != NULL)
    {
        char *dir;

        dir = gtk_file_chooser_get_current_folder (chooser);

        eel_gconf_set_path (dialog->priv->persist_key, dir);

        g_free (dir);
    }
}

static void
ephy_file_chooser_init (EphyFileChooser *dialog)
{
    dialog->priv = EPHY_FILE_CHOOSER_GET_PRIVATE (dialog);
}

static GObject *
ephy_file_chooser_constructor (GType type,
                   guint n_construct_properties,
                   GObjectConstructParam *construct_params)

{
    GObject *object;
    char *downloads_dir;

    object = parent_class->constructor (type, n_construct_properties,
                        construct_params);

    downloads_dir = ephy_file_downloads_dir ();
    gtk_file_chooser_add_shortcut_folder
        (GTK_FILE_CHOOSER (object), downloads_dir, NULL);
    g_free (downloads_dir);

    gtk_window_set_icon_name (GTK_WINDOW (object), "web-browser");

    return object;
}

static void
ephy_file_chooser_finalize (GObject *object)
{
    EphyFileChooser *dialog = EPHY_FILE_CHOOSER (object);

    g_free (dialog->priv->persist_key);

    LOG ("EphyFileChooser finalised")

    G_OBJECT_CLASS (parent_class)->finalize (object);
}

void
ephy_file_chooser_set_persist_key (EphyFileChooser *dialog, const char *key)
{
    char *dir, *expanded, *converted;

    g_return_if_fail (key != NULL && key[0] != '\0');

    dialog->priv->persist_key = g_strdup (key);

    dir = eel_gconf_get_string (key);
    if (dir != NULL)
    {
        converted = g_filename_from_utf8
            (dir, -1, NULL, NULL, NULL);

        if (converted != NULL)
        {
            expanded = gnome_vfs_expand_initial_tilde (converted);

            gtk_file_chooser_set_current_folder
                (GTK_FILE_CHOOSER (dialog), expanded);

            g_free (expanded);
            g_free (converted);
        }

        g_free (dir);
    }

    g_signal_connect (dialog, "current-folder-changed",
              G_CALLBACK (current_folder_changed_cb), dialog);
}

const char *
ephy_file_chooser_get_persist_key (EphyFileChooser *dialog)
{
    g_return_val_if_fail (EPHY_IS_FILE_CHOOSER (dialog), NULL);

    return dialog->priv->persist_key;
}

/* This function should really be in gtk+, see bug 142142 */

GtkFileFilter *
ephy_file_chooser_add_pattern_filter (EphyFileChooser *dialog,
                      const char *title,
                      const char *first_pattern,
                      ...)
{
    GtkFileFilter *filth;
    va_list args;
    const char *pattern;

    filth = gtk_file_filter_new ();

    va_start (args, first_pattern);

    pattern = first_pattern;
    while (pattern != NULL)
    {
        gtk_file_filter_add_pattern (filth, pattern);
        pattern = va_arg (args, const char *);
    }
    va_end (args);

    gtk_file_filter_set_name (filth, title);

    gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filth);

    return filth;
}

/* This function should really be in gtk+, see bug 142142 */

GtkFileFilter *
ephy_file_chooser_add_mime_filter (EphyFileChooser *dialog,
                   const char *title,
                   const char *first_mimetype,
                   ...)
{
    GtkFileFilter *filth;
    va_list args;
    const char *mimetype;

    filth = gtk_file_filter_new ();

    va_start (args, first_mimetype);

    mimetype = first_mimetype;
    while (mimetype != NULL)
    {
        gtk_file_filter_add_mime_type (filth, mimetype);
        mimetype = va_arg (args, const char *);
    }
    va_end (args);

    gtk_file_filter_set_name (filth, title);

    gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filth);

    return filth;
}

static void
ephy_file_chooser_set_property (GObject *object,
                guint prop_id,
                const GValue *value,
                GParamSpec *pspec)
{
    EphyFileChooser *dialog = EPHY_FILE_CHOOSER (object);
    
    switch (prop_id)
    {
        case PROP_PERSIST_KEY:
            ephy_file_chooser_set_persist_key (dialog, g_value_get_string (value));
            break;
    }
}

static void
ephy_file_chooser_get_property (GObject *object,
                guint prop_id,
                GValue *value,
                GParamSpec *pspec)
{
    EphyFileChooser *dialog = EPHY_FILE_CHOOSER (object);

    switch (prop_id)
    {
        case PROP_PERSIST_KEY:
            g_value_set_string (value, ephy_file_chooser_get_persist_key (dialog));
            break;
    }
}

static void
ephy_file_chooser_class_init (EphyFileChooserClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    object_class->constructor = ephy_file_chooser_constructor;
    object_class->finalize = ephy_file_chooser_finalize;
    object_class->get_property = ephy_file_chooser_get_property;
    object_class->set_property = ephy_file_chooser_set_property;

    g_object_class_install_property (object_class,
                     PROP_PERSIST_KEY,
                     g_param_spec_string ("persist-key",
                                  "Persist Key",
                                  "The gconf key to which to persist the selected directory",
                                  NULL,
                                  G_PARAM_READWRITE));

    g_type_class_add_private (object_class, sizeof (EphyFileChooserPrivate));
}

EphyFileChooser *
ephy_file_chooser_new (const char *title,
               GtkWidget *parent,
               GtkFileChooserAction action,
               const char *persist_key,
               EphyFileFilterDefault default_filter)
{
    EphyFileChooser *dialog;
    GtkFileFilter *filter[EPHY_FILE_FILTER_LAST];

    g_return_val_if_fail (default_filter >= 0 && default_filter <= EPHY_FILE_FILTER_LAST, NULL);

    dialog = EPHY_FILE_CHOOSER (g_object_new (EPHY_TYPE_FILE_CHOOSER,
                          "title", title,
                          "action", action,
                          NULL));

    /* NOTE: We cannot set this property on object construction time.
     * This is because GtkFileChooserDialog overrides the gobject
     * constructor; the GtkFileChooser delegate will only be set
     * _after_ our instance_init and construct-param setters will have
     * run.
     */
    if (persist_key != NULL)
    {
        ephy_file_chooser_set_persist_key (dialog, persist_key);
    }

    if (action == GTK_FILE_CHOOSER_ACTION_OPEN      ||
        action == GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER ||
        action == GTK_FILE_CHOOSER_ACTION_CREATE_FOLDER)
    {
        gtk_dialog_add_buttons (GTK_DIALOG (dialog),
                    GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                    GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
                    NULL);
        gtk_dialog_set_default_response (GTK_DIALOG (dialog),
                         GTK_RESPONSE_ACCEPT);
    }
    else if (action == GTK_FILE_CHOOSER_ACTION_SAVE)
    {
        gtk_dialog_add_buttons (GTK_DIALOG (dialog),
                    GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                    GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT,
                    NULL);
        gtk_dialog_set_default_response (GTK_DIALOG (dialog),
                         GTK_RESPONSE_ACCEPT);
    }

    if (default_filter != EPHY_FILE_FILTER_NONE)
    {
        filter[EPHY_FILE_FILTER_ALL_SUPPORTED] =
            ephy_file_chooser_add_mime_filter
                (dialog,
                 _("All supported types"),
                 "text/html",
                 "application/xhtml+xml",
                 "text/xml",
                 "image/png",
                 "image/jpeg",
                 "image/gif",
                 NULL);

        filter[EPHY_FILE_FILTER_WEBPAGES] =
            ephy_file_chooser_add_mime_filter
                (dialog, _("Web pages"),
                 "text/html",
                 "application/xhtml+xml",
                 "text/xml",
                 NULL);

        filter[EPHY_FILE_FILTER_IMAGES] =
            ephy_file_chooser_add_mime_filter
                (dialog, _("Images"),
                 "image/png",
                 "image/jpeg",
                 "image/gif",
                 NULL);

        filter[EPHY_FILE_FILTER_ALL] =
            ephy_file_chooser_add_pattern_filter
                (dialog, _("All files"), "*", NULL);

        gtk_file_chooser_set_filter (GTK_FILE_CHOOSER (dialog),
                         filter[default_filter]);
    }

    if (parent != NULL)
    {
        gtk_window_set_transient_for (GTK_WINDOW (dialog),
                          GTK_WINDOW (parent));

        gtk_window_set_destroy_with_parent (GTK_WINDOW (dialog), TRUE);
    }

    return dialog;
}