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/*
 *  Copyright © 2003 Marco Pesenti Gritti
 *  Copyright © 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"

#include "ephy-file-chooser.h"
#include "ephy-file-helpers.h"
#include "ephy-state.h"
#include "ephy-gui.h"
#include "ephy-debug.h"
#include "ephy-settings.h"
#include "ephy-string.h"

#include <gtk/gtk.h>
#include <glib/gi18n.h>

static void ephy_file_chooser_class_init    (EphyFileChooserClass *klass);
static void ephy_file_chooser_init      (EphyFileChooser *dialog);
static void ephy_file_chooser_image_preview (GtkFileChooser *file_chooser, 
                         gpointer user_data);

#define PREVIEW_WIDTH 150
#define PREVIEW_HEIGHT 150

G_DEFINE_TYPE (EphyFileChooser, ephy_file_chooser, GTK_TYPE_FILE_CHOOSER_DIALOG)

static void
ephy_file_chooser_init (EphyFileChooser *dialog)
{
}

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

{
    GObject *object;
    char *downloads_dir;

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

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

    return object;
}

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;
}

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_class_init (EphyFileChooserClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->constructor = ephy_file_chooser_constructor;
}

static void
ephy_file_chooser_image_preview (GtkFileChooser *file_chooser, 
                 gpointer user_data)
{
    char *filename;
    GtkWidget *preview;
    GdkPixbuf *pixbuf;
    gboolean have_preview;
    
    pixbuf = NULL;
    preview = GTK_WIDGET (user_data);
    filename = gtk_file_chooser_get_preview_filename (file_chooser);
    
    if (filename)
        pixbuf = gdk_pixbuf_new_from_file_at_size (filename, 
                    PREVIEW_WIDTH, PREVIEW_HEIGHT, NULL);
    g_free (filename);
    
    have_preview = (pixbuf != NULL);
    gtk_image_set_from_pixbuf (GTK_IMAGE (preview), pixbuf);
    
    if (pixbuf)
        g_object_unref (pixbuf);
        
    gtk_file_chooser_set_preview_widget_active (file_chooser, have_preview);
    
}

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

    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));

    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);
    }

    preview = gtk_image_new ();
    gtk_file_chooser_set_preview_widget (GTK_FILE_CHOOSER (dialog), preview);
    g_signal_connect (dialog, "update-preview", G_CALLBACK (ephy_file_chooser_image_preview), preview);
    
    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",
                                 "message/rfc822", /* MHTML */
                 "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",
                                 "message/rfc822", /* MHTML */
                 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_group_add_window (ephy_gui_ensure_window_group (GTK_WINDOW (parent)),
                         GTK_WINDOW (dialog));
        gtk_window_set_destroy_with_parent (GTK_WINDOW (dialog), TRUE);
    }

    return dialog;
}