/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */

/*

 * Copyright (C) 2018 Sébastien Wilmet <swilmet@gnome.org>

 *

 * 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 of the

 * License, 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 "dh-tab-label.h"

#include "dh-web-view.h"

struct _DhTabLabelPrivate {

        /* Weak ref */

        DhTab *tab;

        GtkLabel *label;

};

enum {

        PROP_0,

        PROP_TAB,

        N_PROPERTIES

};

static GParamSpec *properties[N_PROPERTIES];

G_DEFINE_TYPE_WITH_PRIVATE (DhTabLabel, dh_tab_label, GTK_TYPE_GRID)

static void

update_label (DhTabLabel *tab_label)

{

        DhWebView *web_view;

        const gchar *title;

        if (tab_label->priv->tab == NULL)

                return;

        web_view = dh_tab_get_web_view (tab_label->priv->tab);

        title = dh_web_view_get_devhelp_title (web_view);

        gtk_label_set_text (tab_label->priv->label, title);

}

static void

web_view_title_notify_cb (DhWebView  *web_view,

                          GParamSpec *pspec,

                          DhTabLabel *tab_label)

{

        update_label (tab_label);

}

static void

set_tab (DhTabLabel *tab_label,

         DhTab      *tab)

{

        DhWebView *web_view;

        if (tab == NULL)

                return;

        g_return_if_fail (DH_IS_TAB (tab));

        g_assert (tab_label->priv->tab == NULL);

        tab_label->priv->tab = tab;

        g_object_add_weak_pointer (G_OBJECT (tab_label->priv->tab),

                                   (gpointer *) &tab_label->priv->tab);

        web_view = dh_tab_get_web_view (tab);

        g_signal_connect_object (web_view,

                                 "notify::title",

                                 G_CALLBACK (web_view_title_notify_cb),

                                 tab_label,

                                 0);

        update_label (tab_label);

}

static void

dh_tab_label_get_property (GObject    *object,

                           guint       prop_id,

                           GValue     *value,

                           GParamSpec *pspec)

{

        DhTabLabel *tab_label = DH_TAB_LABEL (object);

        switch (prop_id) {

                case PROP_TAB:

                        g_value_set_object (value, dh_tab_label_get_tab (tab_label));

                        break;

                default:

                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

                        break;

        }

}

static void

dh_tab_label_set_property (GObject      *object,

                           guint         prop_id,

                           const GValue *value,

                           GParamSpec   *pspec)

{

        DhTabLabel *tab_label = DH_TAB_LABEL (object);

        switch (prop_id) {

                case PROP_TAB:

                        set_tab (tab_label, g_value_get_object (value));

                        break;

                default:

                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

                        break;

        }

}

static void

dh_tab_label_dispose (GObject *object)

{

        DhTabLabel *tab_label = DH_TAB_LABEL (object);

        if (tab_label->priv->tab != NULL) {

                g_object_remove_weak_pointer (G_OBJECT (tab_label->priv->tab),

                                              (gpointer *) &tab_label->priv->tab);

                tab_label->priv->tab = NULL;

        }

        G_OBJECT_CLASS (dh_tab_label_parent_class)->dispose (object);

}

static void

dh_tab_label_class_init (DhTabLabelClass *klass)

{

        GObjectClass *object_class = G_OBJECT_CLASS (klass);

        object_class->get_property = dh_tab_label_get_property;

        object_class->set_property = dh_tab_label_set_property;

        object_class->dispose = dh_tab_label_dispose;

        properties[PROP_TAB] =

                g_param_spec_object ("tab",

                                     "tab",

                                     "",

                                     DH_TYPE_TAB,

                                     G_PARAM_READWRITE |

                                     G_PARAM_CONSTRUCT_ONLY |

                                     G_PARAM_STATIC_STRINGS);

        g_object_class_install_properties (object_class, N_PROPERTIES, properties);

}

static GtkWidget *

create_close_button (void)

{

        GtkWidget *close_button;

        GtkStyleContext *style_context;

        close_button = gtk_button_new_from_icon_name ("window-close-symbolic",

                                                      GTK_ICON_SIZE_BUTTON);

        gtk_button_set_relief (GTK_BUTTON (close_button), GTK_RELIEF_NONE);

        gtk_widget_set_focus_on_click (close_button, FALSE);

        style_context = gtk_widget_get_style_context (close_button);

        gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_FLAT);

        return close_button;

}

static void

close_button_clicked_cb (GtkButton  *close_button,

			 DhTabLabel *tab_label)

{

        if (tab_label->priv->tab != NULL)

                gtk_widget_destroy (GTK_WIDGET (tab_label->priv->tab));

}

static void

dh_tab_label_init (DhTabLabel *tab_label)

{

        GtkWidget *close_button;

        tab_label->priv = dh_tab_label_get_instance_private (tab_label);

        gtk_grid_set_column_spacing (GTK_GRID (tab_label), 4);

        /* Label */

        tab_label->priv->label = GTK_LABEL (gtk_label_new (NULL));

        gtk_widget_set_hexpand (GTK_WIDGET (tab_label->priv->label), TRUE);

        gtk_widget_set_vexpand (GTK_WIDGET (tab_label->priv->label), TRUE);

        gtk_widget_set_halign (GTK_WIDGET (tab_label->priv->label), GTK_ALIGN_CENTER);

        gtk_label_set_ellipsize (tab_label->priv->label, PANGO_ELLIPSIZE_END);

        gtk_widget_show (GTK_WIDGET (tab_label->priv->label));

        gtk_container_add (GTK_CONTAINER (tab_label),

                           GTK_WIDGET (tab_label->priv->label));

        /* Close button */

        close_button = create_close_button ();

        g_signal_connect (close_button,

                          "clicked",

                          G_CALLBACK (close_button_clicked_cb),

                          tab_label);

        gtk_widget_show (close_button);

        gtk_container_add (GTK_CONTAINER (tab_label), close_button);

}

GtkWidget *

dh_tab_label_new (DhTab *tab)

{

        g_return_val_if_fail (DH_IS_TAB (tab), NULL);

        return g_object_new (DH_TYPE_TAB_LABEL,

                             "tab", tab,

                             NULL);

}

/* Returns: (transfer none) (nullable): the #DhTabLabel:tab. */

DhTab *

dh_tab_label_get_tab (DhTabLabel *tab_label)

{

        g_return_val_if_fail (DH_IS_TAB_LABEL (tab_label), NULL);

        return tab_label->priv->tab;

}