path: root/modules/mailto-handler/evolution-mailto-handler.c

/*
 * evolution-mailto-handler.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/>
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <glib/gi18n-lib.h>
#include <libebackend/libebackend.h>

#include <shell/e-shell.h>

/* Standard GObject macros */
#define E_TYPE_MAILTO_HANDLER \
    (e_mailto_handler_get_type ())
#define E_MAILTO_HANDLER(obj) \
    (G_TYPE_CHECK_INSTANCE_CAST \
    ((obj), E_TYPE_MAILTO_HANDLER, EMailtoHandler))

#define MAILTO_COMMAND \
    "evolution --component=mail"

#define MAILTO_HANDLER "x-scheme-handler/mailto"

typedef struct _EMailtoHandler EMailtoHandler;
typedef struct _EMailtoHandlerClass EMailtoHandlerClass;

struct _EMailtoHandler {
    EExtension parent;
};

struct _EMailtoHandlerClass {
    EExtensionClass parent_class;
};

/* Module Entry Points */
void e_module_load (GTypeModule *type_module);
void e_module_unload (GTypeModule *type_module);

/* Forward Declarations */
GType e_mailto_handler_get_type (void);

G_DEFINE_DYNAMIC_TYPE (EMailtoHandler, e_mailto_handler, E_TYPE_EXTENSION)

static EShell *
mailto_handler_get_shell (EMailtoHandler *extension)
{
    EExtensible *extensible;

    extensible = e_extension_get_extensible (E_EXTENSION (extension));

    return E_SHELL (extensible);
}

static gboolean
mailto_handler_is_evolution (GAppInfo *app_info)
{
    gint argc;
    gchar **argv;
    gchar *basename;
    gboolean is_evolution;
    const gchar *mailto_command;

    if (app_info == NULL)
        return FALSE;

    mailto_command = g_app_info_get_commandline (app_info);
    if (mailto_command == NULL)
        return FALSE;

    /* Tokenize the mailto command. */
    if (!g_shell_parse_argv (mailto_command, &argc, &argv, NULL))
        return FALSE;

    g_return_val_if_fail (argc > 0, FALSE);

    /* Check the basename of the first token. */
    basename = g_path_get_basename (argv[0]);
    is_evolution = g_str_has_prefix (basename, "evolution");
    g_free (basename);

    g_strfreev (argv);

    return is_evolution;
}

static gboolean
mailto_handler_prompt (EMailtoHandler *extension)
{
    GSettings *settings;
    GtkWidget *container;
    GtkWidget *dialog;
    GtkWidget *widget;
    const gchar *text;
    gchar *markup;
    gint response;

    dialog = gtk_dialog_new_with_buttons (
        "", NULL, 0,
        GTK_STOCK_NO, GTK_RESPONSE_NO,
        GTK_STOCK_YES, GTK_RESPONSE_YES,
        NULL);

    gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_YES);
    gtk_container_set_border_width (GTK_CONTAINER (dialog), 5);

    container = gtk_dialog_get_content_area (GTK_DIALOG (dialog));

    widget = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
    gtk_container_set_border_width (GTK_CONTAINER (widget), 5);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    gtk_widget_show (widget);

    container = widget;

    widget = gtk_image_new_from_stock (
        GTK_STOCK_DIALOG_QUESTION, GTK_ICON_SIZE_DIALOG);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);

    widget = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    gtk_widget_show (widget);

    container = widget;

    text = _("Do you want to make Evolution your default email client?");
    markup = g_markup_printf_escaped ("<b>%s</b>", text);
    widget = gtk_label_new (NULL);
    gtk_label_set_markup (GTK_LABEL (widget), markup);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);
    g_free (markup);

    text = _("_Do not show this message again");
    widget = gtk_check_button_new_with_mnemonic (text);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 12);
    gtk_widget_show (widget);

    settings = g_settings_new ("org.gnome.evolution.mail");

    g_settings_bind (
        settings, "prompt-check-if-default-mailer",
        widget, "active",
        G_SETTINGS_BIND_GET |
        G_SETTINGS_BIND_SET |
        G_SETTINGS_BIND_INVERT_BOOLEAN);

    g_object_unref (settings);

    /* Direct input focus away from the checkbox. */
    widget = gtk_dialog_get_widget_for_response (
        GTK_DIALOG (dialog), GTK_RESPONSE_YES);
    gtk_widget_grab_focus (widget);

    response = gtk_dialog_run (GTK_DIALOG (dialog));

    gtk_widget_destroy (dialog);

    return (response == GTK_RESPONSE_YES);
}

static void
mailto_handler_check (EMailtoHandler *extension)
{
    GSettings *settings;
    gboolean check_mailto_handler = TRUE;
    GAppInfo *app_info = NULL;
    GError *error = NULL;

    settings = g_settings_new ("org.gnome.evolution.mail");

    check_mailto_handler = g_settings_get_boolean (
        settings, "prompt-check-if-default-mailer");

    g_object_unref (settings);

    /* Should we check the "mailto" URI handler? */
    if (!check_mailto_handler)
        goto exit;

    app_info = g_app_info_get_default_for_type (MAILTO_HANDLER, FALSE);

    /* Is Evolution already handling "mailto" URIs? */
    if (mailto_handler_is_evolution (app_info))
        goto exit;

    /* Does the user want Evolution to handle them? */
    if (!mailto_handler_prompt (extension))
        goto exit;

    g_clear_object (&app_info);

    /* Configure Evolution to be the "mailto" URI handler. */
    app_info = g_app_info_create_from_commandline (
        MAILTO_COMMAND,
        _("Evolution"),
        G_APP_INFO_CREATE_SUPPORTS_URIS,
        &error);

    /* Sanity check. */
    g_return_if_fail (
        ((app_info != NULL) && (error == NULL)) ||
        ((app_info == NULL) && (error != NULL)));

    if (app_info != NULL)
        g_app_info_set_as_default_for_type (
            app_info, MAILTO_HANDLER, &error);

exit:
    g_clear_object (&app_info);

    if (error != NULL) {
        g_warning (
            "Failed to register as default handler: %s",
            error->message);
        g_error_free (error);
    }
}

static void
mailto_handler_constructed (GObject *object)
{
    EShell *shell;
    EMailtoHandler *extension;

    extension = E_MAILTO_HANDLER (object);

    shell = mailto_handler_get_shell (extension);

    g_signal_connect_swapped (
        shell, "event::ready-to-start",
        G_CALLBACK (mailto_handler_check), extension);

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

static void
e_mailto_handler_class_init (EMailtoHandlerClass *class)
{
    GObjectClass *object_class;
    EExtensionClass *extension_class;

    object_class = G_OBJECT_CLASS (class);
    object_class->constructed = mailto_handler_constructed;

    extension_class = E_EXTENSION_CLASS (class);
    extension_class->extensible_type = E_TYPE_SHELL;
}

static void
e_mailto_handler_class_finalize (EMailtoHandlerClass *class)
{
}

static void
e_mailto_handler_init (EMailtoHandler *extension)
{
}

G_MODULE_EXPORT void
e_module_load (GTypeModule *type_module)
{
    e_mailto_handler_register_type (type_module);
}

G_MODULE_EXPORT void
e_module_unload (GTypeModule *type_module)
{
}