/*
 * Copyright 2015 Javier S. Pedro <dev.git@javispedro.com>
 *
 * This file is part of MDock.
 *
 * MDock 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 3 of the License, or
 * (at your option) any later version.
 *
 * MDock 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 General Public License
 * along with MDock.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <glib/gi18n.h>

#include "mdock-item-menu.h"

#define MDOCK_ITEM_MENU_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE((object), MDOCK_TYPE_ITEM_MENU, MDockItemMenuPrivate))

struct _MDockItemMenuPrivate
{
	GtkSeparatorMenuItem *menu_sep1;
	GtkImageMenuItem *menu_close_all;
	GtkImageMenuItem *menu_pin;
	GtkImageMenuItem *menu_launch;
};

G_DEFINE_TYPE (MDockItemMenu, mdock_item_menu, GTK_TYPE_MENU)

enum {
	PROP_0,
	PROP_ITEM,
	N_PROPERTIES
};

static GParamSpec *obj_properties[N_PROPERTIES] = { NULL };

static void handle_item_pinned(MDockItemMenu *self, GParamSpec *spec, MDockItem *item)
{
	const gboolean pinned = mdock_item_get_pinned(item);
	gtk_menu_item_set_label(GTK_MENU_ITEM(self->priv->menu_pin),
		                    pinned ? _("Un_pin") : _("_Pin"));
}

static void handle_item_desktop_app_info(MDockItemMenu *self, GParamSpec *spec, MDockItem *item)
{
	GDesktopAppInfo *appinfo = mdock_item_get_desktop_app_info(item);

	gtk_widget_set_visible(GTK_WIDGET(self->priv->menu_pin), appinfo != NULL);
	gtk_widget_set_visible(GTK_WIDGET(self->priv->menu_launch), appinfo != NULL);

	if (!gtk_image_menu_item_get_image(self->priv->menu_launch) && appinfo) {
		gint width, height;
		if (gtk_icon_size_lookup(GTK_ICON_SIZE_MENU, &width, &height)) {
			GtkIconTheme *theme = gtk_icon_theme_get_default();
			gint icon_size = MAX(width, height);
			GIcon *icon = g_app_info_get_icon(G_APP_INFO(appinfo));
			GtkIconInfo *info = gtk_icon_theme_lookup_by_gicon(theme, icon, icon_size,
			                                                   GTK_ICON_LOOKUP_GENERIC_FALLBACK | GTK_ICON_LOOKUP_FORCE_SIZE);
			if (info) {
				GdkPixbuf *pixbuf = gtk_icon_info_load_icon(info, NULL);
				if (pixbuf) {
					GtkWidget *image = gtk_image_new_from_pixbuf(pixbuf);
					gtk_image_menu_item_set_image(self->priv->menu_launch, image);
					g_object_unref(pixbuf);
				}
				gtk_icon_info_free(info);
			}
		}
	}
}

static void handle_item_n_windows(MDockItemMenu *self, GParamSpec *spec, MDockItem *item)
{
	gtk_widget_set_visible(GTK_WIDGET(self->priv->menu_close_all),
	                       mdock_item_has_windows(item));
}

static void mdock_item_menu_set_property(GObject        *object,
                                         guint           property_id,
                                         const GValue   *value,
                                         GParamSpec     *pspec)
{
	MDockItemMenu *self = MDOCK_ITEM_MENU(object);
	switch (property_id) {
	case PROP_ITEM:
		g_clear_object(&self->item);
		self->item = g_value_dup_object(value);
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
		break;
	}
}

static void mdock_item_menu_get_property(GObject        *object,
                                         guint           property_id,
                                         GValue         *value,
                                         GParamSpec     *pspec)
{
	MDockItemMenu *self = MDOCK_ITEM_MENU(object);
	switch (property_id) {
	case PROP_ITEM:
		g_value_set_object(value, self->item);
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
		break;
	}
}

static void
mdock_item_menu_constructed(GObject *object)
{
	MDockItemMenu *self = MDOCK_ITEM_MENU(object);

	g_signal_connect_object(self->priv->menu_close_all, "activate",
	                        G_CALLBACK(mdock_item_close_all_windows), self->item,
	                        G_CONNECT_SWAPPED);

	g_signal_connect_object(self->priv->menu_pin, "activate",
	                        G_CALLBACK(mdock_item_toggle_pinned), self->item,
	                        G_CONNECT_SWAPPED);

	g_signal_connect_object(self->priv->menu_launch, "activate",
	                        G_CALLBACK(mdock_item_launch), self->item,
	                        G_CONNECT_SWAPPED);

	g_signal_connect_object(self->item, "notify::pinned",
	                        G_CALLBACK(handle_item_pinned), self,
	                        G_CONNECT_SWAPPED);

	g_signal_connect_object(self->item, "notify::desktop-app-info",
	                        G_CALLBACK(handle_item_desktop_app_info), self,
	                        G_CONNECT_SWAPPED);

	g_signal_connect_object(self->item, "notify::n-windows",
	                        G_CALLBACK(handle_item_n_windows), self,
	                        G_CONNECT_SWAPPED);

	handle_item_desktop_app_info(self, NULL, self->item);
	handle_item_pinned(self, NULL, self->item);
}


static void
mdock_item_menu_dispose(GObject *object)
{
	MDockItemMenu *self = MDOCK_ITEM_MENU(object);
	g_clear_object(&self->item);
	G_OBJECT_CLASS (mdock_item_menu_parent_class)->dispose(object);
}

static void
mdock_item_menu_finalize (GObject *object)
{
	G_OBJECT_CLASS (mdock_item_menu_parent_class)->finalize (object);
}

static void
mdock_item_menu_init (MDockItemMenu *self)
{
	self->priv = MDOCK_ITEM_MENU_GET_PRIVATE (self);

	self->priv->menu_sep1 = GTK_SEPARATOR_MENU_ITEM(gtk_separator_menu_item_new());
	gtk_menu_shell_append(GTK_MENU_SHELL(self), GTK_WIDGET(self->priv->menu_sep1));

	self->priv->menu_close_all = GTK_IMAGE_MENU_ITEM(gtk_image_menu_item_new_from_stock(GTK_STOCK_CLOSE, NULL));
	gtk_menu_shell_append(GTK_MENU_SHELL(self), GTK_WIDGET(self->priv->menu_close_all));

	self->priv->menu_pin = GTK_IMAGE_MENU_ITEM(gtk_image_menu_item_new_with_mnemonic(_("_Pin")));
	gtk_menu_shell_append(GTK_MENU_SHELL(self), GTK_WIDGET(self->priv->menu_pin));

	self->priv->menu_launch = GTK_IMAGE_MENU_ITEM(gtk_image_menu_item_new_with_mnemonic(_("_New instance")));
	gtk_menu_shell_append(GTK_MENU_SHELL(self), GTK_WIDGET(self->priv->menu_launch));
}

static void
mdock_item_menu_class_init (MDockItemMenuClass *klass)
{
	GObjectClass *obj_class = G_OBJECT_CLASS (klass);
	obj_class->set_property = mdock_item_menu_set_property;
	obj_class->get_property = mdock_item_menu_get_property;
	obj_class->constructed = mdock_item_menu_constructed;
	obj_class->dispose = mdock_item_menu_dispose;
	obj_class->finalize = mdock_item_menu_finalize;

	g_type_class_add_private(obj_class, sizeof(MDockItemMenuPrivate));

	obj_properties[PROP_ITEM] = g_param_spec_object("item",
	                                                "The MDockItem the options in this menu apply to",
	                                                "Set the MDockItem the options in this menu apply to",
	                                                MDOCK_TYPE_ITEM,
	                                                G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

	g_object_class_install_properties(obj_class, N_PROPERTIES, obj_properties);
}

MDockItemMenu *
mdock_item_menu_new(MDockItem *item)
{
	return g_object_new(MDOCK_TYPE_ITEM_MENU, "item", item, NULL);
}