path: root/widgets/misc/e-attachment-handler-image.c

/*
 * e-attachment-handler-image.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-attachment-handler-image.h"

#include <glib/gi18n.h>
#include <gconf/gconf-client.h>

#define E_ATTACHMENT_HANDLER_IMAGE_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_ATTACHMENT_HANDLER_IMAGE, EAttachmentHandlerImagePrivate))

struct _EAttachmentHandlerImagePrivate {
    gint placeholder;
};

static gpointer parent_class;

static const gchar *ui =
"<ui>"
"  <popup name='context'>"
"    <placeholder name='custom-actions'>"
"      <menuitem action='image-set-as-background'/>"
"    </placeholder>"
"  </popup>"
"</ui>";

static void
action_image_set_as_background_saved_cb (EAttachment *attachment,
                                         GAsyncResult *result,
                                         EAttachmentHandler *handler)
{
    EAttachmentView *view;
    GConfClient *client;
    GtkWidget *dialog;
    GFile *file;
    const gchar *key;
    gpointer parent;
    gchar *value;
    GError *error = NULL;

    client = gconf_client_get_default ();
    view = e_attachment_handler_get_view (handler);

    file = e_attachment_save_finish (attachment, result, &error);

    if (error != NULL)
        goto error;

    value = g_file_get_path (file);
    g_object_unref (file);

    key = "/desktop/gnome/background/picture_filename";
    gconf_client_set_string (client, key, value, &error);
    g_free (value);

    if (error != NULL)
        goto error;

    /* Ignore errors for this part. */
    key = "/desktop/gnome/background/picture_options";
    value = gconf_client_get_string (client, key, NULL);
    if (g_strcmp0 (value, "none") == 0)
        gconf_client_set_string (client, key, "wallpaper", NULL);
    g_free (value);

    goto exit;

error:
    parent = gtk_widget_get_toplevel (GTK_WIDGET (view));
    parent = GTK_WIDGET_TOPLEVEL (parent) ? parent : NULL;

    dialog = gtk_message_dialog_new_with_markup (
        parent, GTK_DIALOG_DESTROY_WITH_PARENT,
        GTK_MESSAGE_ERROR, GTK_BUTTONS_OK,
        "<big><b>%s</b></big>",
        _("Could not set as background"));

    gtk_message_dialog_format_secondary_text (
        GTK_MESSAGE_DIALOG (dialog), "%s", error->message);

    gtk_dialog_run (GTK_DIALOG (dialog));

    gtk_widget_destroy (dialog);
    g_error_free (error);

exit:
    g_object_unref (client);
    g_object_unref (handler);
}

static void
action_image_set_as_background_cb (GtkAction *action,
                                   EAttachmentHandler *handler)
{
    EAttachmentView *view;
    EAttachment *attachment;
    GFile *destination;
    GList *selected;
    gchar *path;

    view = e_attachment_handler_get_view (handler);
    selected = e_attachment_view_get_selected_attachments (view);
    g_return_if_fail (g_list_length (selected) == 1);
    attachment = E_ATTACHMENT (selected->data);

    /* Save the image under ~/.gnome2/wallpapers/. */
    path = g_build_filename (
        g_get_home_dir (), ".gnome2", "wallpapers", NULL);
    destination = g_file_new_for_path (path);
    g_mkdir_with_parents (path, 0755);
    g_free (path);

    e_attachment_save_async (
        attachment, destination, (GAsyncReadyCallback)
        action_image_set_as_background_saved_cb,
        g_object_ref (handler));

    g_object_unref (destination);

    g_list_foreach (selected, (GFunc) g_object_unref, NULL);
    g_list_free (selected);
}

static GtkActionEntry standard_entries[] = {

    { "image-set-as-background",
      NULL,
      N_("Set as _Background"),
      NULL,
      NULL,  /* XXX Add a tooltip! */
      G_CALLBACK (action_image_set_as_background_cb) }
};

static void
attachment_handler_image_update_actions_cb (EAttachmentView *view,
                                            EAttachmentHandler *handler)
{
    EAttachmentHandlerImagePrivate *priv;
    EAttachment *attachment;
    GFileInfo *file_info;
    GtkActionGroup *action_group;
    const gchar *content_type;
    gchar *mime_type;
    GList *selected;
    gboolean visible = FALSE;

    priv = E_ATTACHMENT_HANDLER_IMAGE_GET_PRIVATE (handler);

    selected = e_attachment_view_get_selected_attachments (view);

    if (g_list_length (selected) != 1)
        goto exit;

    attachment = E_ATTACHMENT (selected->data);
    file_info = e_attachment_get_file_info (attachment);

    if (file_info == NULL)
        goto exit;

    if (e_attachment_get_loading (attachment))
        goto exit;

    if (e_attachment_get_saving (attachment))
        goto exit;

    content_type = g_file_info_get_content_type (file_info);

    mime_type = g_content_type_get_mime_type (content_type);
    visible = (g_ascii_strncasecmp (mime_type, "image/", 6) == 0);
    g_free (mime_type);

exit:
    action_group = e_attachment_view_get_action_group (view, "image");
    gtk_action_group_set_visible (action_group, visible);

    g_list_foreach (selected, (GFunc) g_object_unref, NULL);
    g_list_free (selected);
}

static void
attachment_handler_image_constructed (GObject *object)
{
    EAttachmentHandlerImagePrivate *priv;
    EAttachmentHandler *handler;
    EAttachmentView *view;
    GtkActionGroup *action_group;
    GtkUIManager *ui_manager;
    GError *error = NULL;

    handler = E_ATTACHMENT_HANDLER (object);
    priv = E_ATTACHMENT_HANDLER_IMAGE_GET_PRIVATE (object);

    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (parent_class)->constructed (object);

    view = e_attachment_handler_get_view (handler);

    action_group = e_attachment_view_add_action_group (view, "image");
    gtk_action_group_add_actions (
        action_group, standard_entries,
        G_N_ELEMENTS (standard_entries), object);

    ui_manager = e_attachment_view_get_ui_manager (view);
    gtk_ui_manager_add_ui_from_string (ui_manager, ui, -1, &error);

    if (error != NULL) {
        g_warning ("%s", error->message);
        g_error_free (error);
    }

    g_signal_connect (
        view, "update-actions",
        G_CALLBACK (attachment_handler_image_update_actions_cb),
        object);
}

static void
attachment_handler_image_class_init (EAttachmentHandlerImageClass *class)
{
    GObjectClass *object_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (EAttachmentHandlerImagePrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->constructed = attachment_handler_image_constructed;
}

static void
attachment_handler_image_init (EAttachmentHandlerImage *handler)
{
    handler->priv = E_ATTACHMENT_HANDLER_IMAGE_GET_PRIVATE (handler);
}

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

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (EAttachmentHandlerImageClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) attachment_handler_image_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (EAttachmentHandlerImage),
            0,     /* n_preallocs */
            (GInstanceInitFunc) attachment_handler_image_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            E_TYPE_ATTACHMENT_HANDLER,
            "EAttachmentHandlerImage",
            &type_info, 0);
    }

    return type;
}