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// Copyright 2013-2015, The Gtk-rs Project Developers.
// See the COPYRIGHT file at the top-level directory of this distribution.
// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>

use gio::AppInfo;
use glib::object::IsA;
use glib::translate::*;
use gtk_sys;
use Widget;

glib_wrapper! {
    /// `AppChooser` is an interface that can be implemented by widgets which
    /// allow the user to choose an application (typically for the purpose of
    /// opening a file). The main objects that implement this interface are
    /// `AppChooserWidget`, `AppChooserDialog` and `AppChooserButton`.
    ///
    /// Applications are represented by GIO `gio::AppInfo` objects here.
    /// GIO has a concept of recommended and fallback applications for a
    /// given content type. Recommended applications are those that claim
    /// to handle the content type itself, while fallback also includes
    /// applications that handle a more generic content type. GIO also
    /// knows the default and last-used application for a given content
    /// type. The `AppChooserWidget` provides detailed control over
    /// whether the shown list of applications should include default,
    /// recommended or fallback applications.
    ///
    /// To obtain the application that has been selected in a `AppChooser`,
    /// use `AppChooser::get_app_info`.
    ///
    /// # Implements
    ///
    /// [`AppChooserExt`](trait.AppChooserExt.html), [`WidgetExt`](trait.WidgetExt.html), [`glib::object::ObjectExt`](../glib/object/trait.ObjectExt.html), [`BuildableExt`](trait.BuildableExt.html), [`WidgetExtManual`](prelude/trait.WidgetExtManual.html), [`BuildableExtManual`](prelude/trait.BuildableExtManual.html)
    pub struct AppChooser(Interface<gtk_sys::GtkAppChooser>) @requires Widget;

    match fn {
        get_type => || gtk_sys::gtk_app_chooser_get_type(),
    }
}

/// Trait containing all `AppChooser` methods.
///
/// # Implementors
///
/// [`AppChooserButton`](struct.AppChooserButton.html), [`AppChooserDialog`](struct.AppChooserDialog.html), [`AppChooserWidget`](struct.AppChooserWidget.html), [`AppChooser`](struct.AppChooser.html)
pub trait AppChooserExt: 'static {
    /// Returns the currently selected application.
    ///
    /// # Returns
    ///
    /// a `gio::AppInfo` for the currently selected
    ///  application, or `None` if none is selected. Free with `gobject::ObjectExt::unref`
    fn get_app_info(&self) -> Option<AppInfo>;
    /// Returns the current value of the `AppChooser:content-type` property.
    ///
    /// # Returns
    ///
    /// the content type of `self`. Free with `g_free`
    fn get_content_type(&self) -> Option<String>;
    /// Reloads the list of applications.
    fn refresh(&self);
}

impl<O: IsA<AppChooser>> AppChooserExt for O {
    fn get_app_info(&self) -> Option<AppInfo> {
        unsafe {
            from_glib_full(gtk_sys::gtk_app_chooser_get_app_info(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn get_content_type(&self) -> Option<String> {
        unsafe {
            from_glib_full(gtk_sys::gtk_app_chooser_get_content_type(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn refresh(&self) {
        unsafe { gtk_sys::gtk_app_chooser_refresh(self.as_ref().to_glib_none().0) }
    }
}