/*
 *  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, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include "ephy-file-chooser.h"
#include "ephy-file-helpers.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_image_preview (GtkFileChooser *file_chooser,
                                             gpointer        user_data);

#define PREVIEW_WIDTH 150
#define PREVIEW_HEIGHT 150

struct _EphyFileChooser {
  GtkFileChooserDialog parent_instance;
};

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),
                            _("_Cancel"), GTK_RESPONSE_CANCEL,
                            _("_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),
                            _("_Cancel"), GTK_RESPONSE_CANCEL,
                            _("_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);
  gtk_file_chooser_set_preview_widget_active (GTK_FILE_CHOOSER (dialog), FALSE);
  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 */
        "multipart/related",                                  /* MHTML */
        "application/x-mimearchive",                          /* MHTML */
        "image/png",
        "image/jpeg",
        "image/gif",
        "image/webp",
        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 */
        "multipart/related",                                  /* MHTML */
        "application/x-mimearchive",                          /* MHTML */
        NULL);

    filter[EPHY_FILE_FILTER_IMAGES] =
      ephy_file_chooser_add_mime_filter
        (dialog, _("Images"),
        "image/png",
        "image/jpeg",
        "image/gif",
        "image/webp",
        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_modal (GTK_WINDOW (dialog), TRUE);
    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;
}
