/*
 * Copyright (C) 1987-2008 Sun Microsystems, Inc. All Rights Reserved.
 * Copyright (C) 2008-2011 Robert Ancell.
 * Copyright (C) 2024 MATE Desktop Team
 *
 * 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. See http://www.gnu.org/copyleft/gpl.html the full text of the
 * license.
 */

#include <config.h>

#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>

#include "math-window.h"
#include "math-history.h"
#include "mate-calc-settings.h"

/* GTK3 compatibility */
#ifndef GDK_KEY_F1
#define GDK_KEY_F1 GDK_F1
#endif

#ifndef GDK_KEY_W
#define GDK_KEY_W GDK_w
#endif

#ifndef GDK_KEY_Z
#define GDK_KEY_Z GDK_z
#endif

enum {
    PROP_0,
    PROP_EQUATION,
    PROP_SHOW_HISTORY
};

struct MathWindowPrivate
{
    GtkWidget *menu_bar;
    MathEquation *equation;
    MathDisplay *display;
    MathHistory *history;
    MathButtons *buttons;
    MathPreferencesDialog *preferences_dialog;
    GSettings *settings;
    gboolean right_aligned;
    gboolean show_history;
    GtkWidget *mode_basic_menu_item;
    GtkWidget *mode_advanced_menu_item;
    GtkWidget *mode_financial_menu_item;
    GtkWidget *mode_programming_menu_item;
    GtkWidget *view_history_menu_item;
};

G_DEFINE_TYPE_WITH_PRIVATE(MathWindow, math_window, GTK_TYPE_APPLICATION_WINDOW);

MathWindow *
math_window_new(MathEquation *equation)
{
    return g_object_new(math_window_get_type(),
                        "equation", equation, NULL);
}

GtkWidget *
math_window_get_menu_bar(MathWindow *window)
{
    return window->priv->menu_bar;
}

MathEquation *
math_window_get_equation(MathWindow *window)
{
    g_return_val_if_fail(window != NULL, NULL);
    return window->priv->equation;
}

MathDisplay *
math_window_get_display(MathWindow *window)
{
    g_return_val_if_fail(window != NULL, NULL);
    return window->priv->display;
}

MathButtons *
math_window_get_buttons(MathWindow *window)
{
    g_return_val_if_fail(window != NULL, NULL);
    return window->priv->buttons;
}

gboolean
math_window_get_show_history(MathWindow *window)
{
    g_return_val_if_fail(window != NULL, FALSE);
    return window->priv->show_history;
}

void
math_window_set_show_history(MathWindow *window, gboolean visible)
{
    g_return_if_fail(window != NULL);

    if (math_window_get_show_history(window) == visible)
        return;

    window->priv->show_history = visible;

    if (visible)
    {
        gtk_widget_show(GTK_WIDGET(window->priv->history));
        gtk_window_set_resizable(GTK_WINDOW(window), TRUE);
    }
    else
    {
        gtk_widget_hide(GTK_WIDGET(window->priv->history));
        gtk_window_resize(GTK_WINDOW(window), 1, 1);
        gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
    }
    g_object_notify(G_OBJECT(window), "show-history");
}

void
math_window_set_settings(MathWindow *window, GSettings *settings)
{
    g_return_if_fail(window != NULL);
    g_set_object(&window->priv->settings, settings);
}

GSettings *
math_window_get_settings(MathWindow *window)
{
    g_return_val_if_fail(window != NULL, NULL);
    return window->priv->settings;
}

void
math_window_show_preferences(MathWindow *window)
{
    g_return_if_fail(window != NULL);

    if (!window->priv->preferences_dialog)
    {
        window->priv->preferences_dialog = math_preferences_dialog_new(window->priv->equation);
        gtk_window_set_transient_for(GTK_WINDOW(window->priv->preferences_dialog), GTK_WINDOW(window));
    }

    gtk_window_present(GTK_WINDOW(window->priv->preferences_dialog));
}

void
math_window_clear_history(MathWindow *window)
{
    g_return_if_fail(window != NULL);
    math_history_clear(window->priv->history);
}

void
math_window_critical_error(MathWindow *window, const gchar *title, const gchar *contents)
{
    GtkWidget *dialog;
    GtkApplication *app;

    g_return_if_fail(window != NULL);
    g_return_if_fail(title != NULL);
    g_return_if_fail(contents != NULL);

    dialog = gtk_message_dialog_new(GTK_WINDOW(window),
                                    GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
                                    GTK_MESSAGE_ERROR,
                                    GTK_BUTTONS_NONE,
                                    "%s", title);
    gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog),
                                             "%s", contents);
    gtk_dialog_add_buttons(GTK_DIALOG(dialog), _("_Quit"), GTK_RESPONSE_ACCEPT, NULL);

    gtk_dialog_run(GTK_DIALOG(dialog));
    gtk_widget_destroy(dialog);

    /* Critical error - quit the entire application */
    app = gtk_window_get_application(GTK_WINDOW(window));
    if (app)
        g_application_quit(G_APPLICATION(app));
}

static void
mode_changed_cb(GtkWidget *menu, MathWindow *window)
{
    int mode;

    if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(menu)))
        return;

    mode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(menu), "calcmode"));
    math_buttons_set_mode(window->priv->buttons, mode);
}

static void
history_check_toggled_cb(GtkWidget *menu, MathWindow *window)
{
    gboolean value;

    value = gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(menu));
    math_window_set_show_history(window, value);
}

static void
show_history_cb(MathWindow *window, GParamSpec *spec)
{
    GtkWidget *menu = window->priv->view_history_menu_item;
    gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(menu),
                                   math_window_get_show_history(window));

    /* Save to settings if available */
    if (window->priv->settings)
    {
        mate_calc_settings_set_show_history(window->priv->settings,
                                             math_window_get_show_history(window));
    }
}

static void
clear_history_cb(GtkMenuItem *menu, MathWindow *window)
{
    math_window_clear_history(window);
}

static void
show_preferences_cb(GtkMenuItem *menu, MathWindow *window)
{
    math_window_show_preferences(window);
}

static gboolean
key_press_cb(MathWindow *window, GdkEventKey *event)
{
    gboolean result;
    g_signal_emit_by_name(window->priv->display, "key-press-event", event, &result);

    /* Keyboard navigation for history */
    if ((event->state & GDK_MOD1_MASK) == GDK_MOD1_MASK && (event->keyval == GDK_KEY_Up || event->keyval == GDK_KEY_Down))
    {
        switch (event->keyval)
        {
            case GDK_KEY_Up:
                math_history_set_current(window->priv->history, -1);
                break;
            case GDK_KEY_Down:
                math_history_set_current(window->priv->history, 1);
                break;
        }

        MathHistoryEntry *entry = math_history_get_entry_at(window->priv->history, math_history_get_current(window->priv->history));
        if (entry)
        {
            gchar *equation_string = math_history_entry_get_equation(entry);
            math_equation_set(window->priv->equation, equation_string);
            g_free(equation_string);
        }
        return TRUE;
    }
    else if (math_buttons_get_mode(window->priv->buttons) == PROGRAMMING && (event->state & GDK_CONTROL_MASK) == GDK_CONTROL_MASK)
    {
        switch(event->keyval)
        {
        /* Binary */
        case GDK_KEY_b:
            math_equation_set_base(window->priv->equation, 2);
            return TRUE;
        /* Octal */
        case GDK_KEY_o:
            math_equation_set_base(window->priv->equation, 8);
            return TRUE;
        /* Decimal */
        case GDK_KEY_d:
            math_equation_set_base(window->priv->equation, 10);
            return TRUE;
        /* Hexdecimal */
        case GDK_KEY_h:
            math_equation_set_base(window->priv->equation, 16);
            return TRUE;
        }
    }

    return result;
}

static void
copy_cb(GtkWidget *widget, MathWindow *window)
{
    math_equation_copy(window->priv->equation);
}

static void
paste_cb(GtkWidget *widget, MathWindow *window)
{
    math_equation_paste(window->priv->equation);
}

static void
undo_cb(GtkWidget *widget, MathWindow *window)
{
    math_equation_undo(window->priv->equation);
}

static void
redo_cb(GtkWidget *widget, MathWindow *window)
{
    math_equation_redo(window->priv->equation);
}

static void
help_cb(GtkWidget *widget, MathWindow *window)
{
    GtkApplication *app = gtk_window_get_application(GTK_WINDOW(window));
    if (app)
        g_action_group_activate_action(G_ACTION_GROUP(app), "help", NULL);
}

static void
about_cb(GtkWidget *widget, MathWindow *window)
{
    GtkApplication *app = gtk_window_get_application(GTK_WINDOW(window));
    if (app)
        g_action_group_activate_action(G_ACTION_GROUP(app), "about", NULL);
}

static void
quit_cb(GtkWidget *widget, MathWindow *window)
{
    GtkApplication *app = gtk_window_get_application(GTK_WINDOW(window));
    if (app)
        g_action_group_activate_action(G_ACTION_GROUP(app), "quit", NULL);
}

static void
scroll_changed_cb(GtkAdjustment *adjustment, MathWindow *window)
{
    if (window->priv->right_aligned)
        gtk_adjustment_set_value(adjustment, gtk_adjustment_get_upper(adjustment) - gtk_adjustment_get_page_size(adjustment));
}

static void
scroll_value_changed_cb(GtkAdjustment *adjustment, MathWindow *window)
{
    if (gtk_adjustment_get_value(adjustment) == gtk_adjustment_get_upper(adjustment) - gtk_adjustment_get_page_size(adjustment))
        window->priv->right_aligned = TRUE;
    else
        window->priv->right_aligned = FALSE;
}

static void
button_mode_changed_cb(MathButtons *buttons, GParamSpec *spec, MathWindow *window)
{
    GtkWidget *menu;

    switch (math_buttons_get_mode(buttons))
    {
        default:
        case BASIC:
            menu = window->priv->mode_basic_menu_item;
            break;
        case ADVANCED:
            menu = window->priv->mode_advanced_menu_item;
            break;
        case FINANCIAL:
            menu = window->priv->mode_financial_menu_item;
            break;
        case PROGRAMMING:
            menu = window->priv->mode_programming_menu_item;
            break;
    }

    gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(menu), TRUE);

    /* Save to settings if available */
    if (window->priv->settings)
    {
        mate_calc_settings_set_button_mode(window->priv->settings, math_buttons_get_mode(buttons));
    }
}

static GtkWidget *
add_menu(GtkWidget *menu_bar, const gchar *name)
{
    GtkWidget *menu_item;
    GtkWidget *menu;

    menu_item = gtk_menu_item_new_with_mnemonic(name);
    gtk_menu_shell_append(GTK_MENU_SHELL(menu_bar), menu_item);
    gtk_widget_show(menu_item);
    menu = gtk_menu_new();
    gtk_menu_set_reserve_toggle_size(GTK_MENU(menu), FALSE);
    gtk_menu_item_set_submenu(GTK_MENU_ITEM(menu_item), menu);

    return menu;
}

static void
update_history_cb(MathEquation *equation, char *equation_string, MPNumber *answer, MathWindow *window)
{
    math_history_insert_entry(window->priv->history, equation_string, answer);
}

static void
history_set_serializer_cb(MathEquation *equation, MathWindow *window)
{
    MpSerializer *serializer = math_equation_get_serializer(equation);
    math_history_set_serializer(window->priv->history, serializer);
}

static GtkWidget *
add_menu_item(GtkWidget *menu, GtkWidget *menu_item, GCallback callback, gpointer callback_data)
{
    gtk_menu_shell_append(GTK_MENU_SHELL(menu), menu_item);
    gtk_widget_show(menu_item);

    if (callback)
        g_signal_connect(G_OBJECT(menu_item), "activate", callback, callback_data);

    return menu_item;
}

static GtkWidget *
radio_menu_item_new(GSList **group, const gchar *name)
{
    GtkWidget *menu_item = gtk_radio_menu_item_new_with_mnemonic(*group, name);
    *group = gtk_radio_menu_item_get_group(GTK_RADIO_MENU_ITEM(menu_item));
    return menu_item;
}

static GtkWidget *
gtk_image_menu_item_new_from_icon(const gchar   *icon_name,
                                  const gchar   *label_name,
                                  GtkAccelGroup *accel_group)
{
    gchar *concat = g_strconcat(label_name, "     ", NULL);
    GtkWidget *box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 6);
    GtkWidget *icon = gtk_image_new_from_icon_name(icon_name, GTK_ICON_SIZE_MENU);
    GtkWidget *label = gtk_accel_label_new(concat);
    GtkWidget *menu_item = gtk_menu_item_new();

    g_free(concat);

    gtk_container_add(GTK_CONTAINER(box), icon);

    gtk_label_set_use_underline(GTK_LABEL(label), TRUE);
    gtk_label_set_xalign(GTK_LABEL(label), 0.0);

    gtk_accel_label_set_accel_widget(GTK_ACCEL_LABEL(label), menu_item);

    gtk_box_pack_end(GTK_BOX(box), label, TRUE, TRUE, 0);

    gtk_container_add(GTK_CONTAINER(menu_item), box);

    gtk_widget_show_all(menu_item);

    return menu_item;
}

static void
create_menu(MathWindow *window)
{
    GtkAccelGroup *accel_group;
    GtkWidget *menu;
    GtkWidget *menu_item;
    GSList *group = NULL;

    accel_group = gtk_accel_group_new();
    gtk_window_add_accel_group(GTK_WINDOW(window), accel_group);

    /* Calculator menu */
    #define CALCULATOR_MENU_LABEL _("_Calculator")
    /* Mode menu */
    #define MODE_MENU_LABEL _("_Mode")
    /* View menu */
    #define VIEW_MENU_LABEL _("_View")
    /* Help menu label */
    #define HELP_MENU_LABEL _("_Help")
    /* Basic menu label */
    #define MODE_BASIC_LABEL _("_Basic")
    /* Advanced menu label */
    #define MODE_ADVANCED_LABEL _("_Advanced")
    /* Financial menu label */
    #define MODE_FINANCIAL_LABEL _("_Financial")
    /* Programming menu label */
    #define MODE_PROGRAMMING_LABEL _("_Programming")
    /* History menu label */
    #define VIEW_HISTORY_LABEL _("_History")
    /* Help>Contents menu label */
    #define HELP_CONTENTS_LABEL _("_Contents")

    menu = add_menu(window->priv->menu_bar, CALCULATOR_MENU_LABEL);
    menu_item = add_menu_item(menu, gtk_image_menu_item_new_from_icon("edit-copy", _("_Copy"), accel_group), G_CALLBACK(copy_cb), window);
    gtk_widget_add_accelerator(menu_item, "activate", accel_group, GDK_KEY_C, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
    menu_item = add_menu_item(menu, gtk_image_menu_item_new_from_icon("edit-paste", _("_Paste"), accel_group), G_CALLBACK(paste_cb), window);
    gtk_widget_add_accelerator(menu_item, "activate", accel_group, GDK_KEY_V, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
    menu_item = add_menu_item(menu, gtk_image_menu_item_new_from_icon("edit-undo", _("_Undo"), accel_group), G_CALLBACK(undo_cb), window);
    gtk_widget_add_accelerator(menu_item, "activate", accel_group, GDK_KEY_Z, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
    menu_item = add_menu_item(menu, gtk_image_menu_item_new_from_icon("edit-redo", _("_Redo"), accel_group), G_CALLBACK(redo_cb), window);
    gtk_widget_add_accelerator(menu_item, "activate", accel_group, GDK_KEY_Z, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_ACCEL_VISIBLE);
    menu_item = add_menu_item(menu, gtk_image_menu_item_new_from_icon("edit-clear", _("_Clear History"), accel_group), G_CALLBACK(clear_history_cb), window);
    gtk_widget_add_accelerator(menu_item, "activate", accel_group, GDK_KEY_Delete, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_ACCEL_VISIBLE);
    add_menu_item(menu, gtk_separator_menu_item_new(), NULL, NULL);
    add_menu_item(menu, gtk_image_menu_item_new_from_icon("preferences-desktop", _("_Preferences"), accel_group), G_CALLBACK(show_preferences_cb), window);
    add_menu_item(menu, gtk_separator_menu_item_new(), NULL, NULL);
    menu_item = add_menu_item(menu, gtk_image_menu_item_new_from_icon("application-exit", _("_Quit"), accel_group), G_CALLBACK(quit_cb), window);
    gtk_widget_add_accelerator(menu_item, "activate", accel_group, GDK_KEY_Q, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
    gtk_widget_add_accelerator(menu_item, "activate", accel_group, GDK_KEY_W, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);

    menu = add_menu(window->priv->menu_bar, MODE_MENU_LABEL);
    window->priv->mode_basic_menu_item = add_menu_item(menu, radio_menu_item_new(&group, MODE_BASIC_LABEL), G_CALLBACK(mode_changed_cb), window);
    g_object_set_data(G_OBJECT(window->priv->mode_basic_menu_item), "calcmode", GINT_TO_POINTER(BASIC));
    window->priv->mode_advanced_menu_item = add_menu_item(menu, radio_menu_item_new(&group, MODE_ADVANCED_LABEL), G_CALLBACK(mode_changed_cb), window);
    g_object_set_data(G_OBJECT(window->priv->mode_advanced_menu_item), "calcmode", GINT_TO_POINTER(ADVANCED));
    window->priv->mode_financial_menu_item = add_menu_item(menu, radio_menu_item_new(&group, MODE_FINANCIAL_LABEL), G_CALLBACK(mode_changed_cb), window);
    g_object_set_data(G_OBJECT(window->priv->mode_financial_menu_item), "calcmode", GINT_TO_POINTER(FINANCIAL));
    window->priv->mode_programming_menu_item = add_menu_item(menu, radio_menu_item_new(&group, MODE_PROGRAMMING_LABEL), G_CALLBACK(mode_changed_cb), window);
    g_object_set_data(G_OBJECT(window->priv->mode_programming_menu_item), "calcmode", GINT_TO_POINTER(PROGRAMMING));

    menu = add_menu(window->priv->menu_bar, VIEW_MENU_LABEL);
    window->priv->view_history_menu_item = add_menu_item(menu, gtk_check_menu_item_new_with_mnemonic(VIEW_HISTORY_LABEL), G_CALLBACK(history_check_toggled_cb), window);
    gtk_widget_add_accelerator(window->priv->view_history_menu_item, "activate", accel_group, GDK_KEY_H, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_ACCEL_VISIBLE);

    menu = add_menu(window->priv->menu_bar, HELP_MENU_LABEL);
    menu_item = add_menu_item(menu, gtk_image_menu_item_new_from_icon("help-browser", HELP_CONTENTS_LABEL, accel_group), G_CALLBACK(help_cb), window);
    gtk_widget_add_accelerator(menu_item, "activate", accel_group, GDK_KEY_F1, 0, GTK_ACCEL_VISIBLE);
    add_menu_item(menu, gtk_image_menu_item_new_from_icon("help-about", _("_About"), accel_group), G_CALLBACK(about_cb), window);
}

static void
create_gui(MathWindow *window)
{
    GtkWidget *main_vbox, *vbox;
    GtkWidget *scrolled_window;

    main_vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
    gtk_container_add(GTK_CONTAINER(window), main_vbox);
    gtk_widget_show(main_vbox);

    window->priv->menu_bar = gtk_menu_bar_new();
    gtk_box_pack_start(GTK_BOX(main_vbox), window->priv->menu_bar, FALSE, FALSE, 0);
    gtk_widget_show(window->priv->menu_bar);

    create_menu(window);

    vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 6);
    gtk_container_set_border_width(GTK_CONTAINER(vbox), 6);
    gtk_box_pack_start(GTK_BOX(main_vbox), vbox, TRUE, TRUE, 0);
    gtk_widget_show(vbox);

    window->priv->history = math_history_new(window->priv->equation);
    g_signal_connect(window->priv->equation, "history", G_CALLBACK(update_history_cb), window);
    g_signal_connect(window, "notify::show-history", G_CALLBACK(show_history_cb), NULL);
    show_history_cb(window, NULL);
    g_signal_connect(window->priv->equation, "display-changed", G_CALLBACK(history_set_serializer_cb), window);
    history_set_serializer_cb(window->priv->equation, window);
    gtk_box_pack_start(GTK_BOX(vbox), GTK_WIDGET(window->priv->history), TRUE, TRUE, 0);

    scrolled_window = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window), GTK_POLICY_AUTOMATIC, GTK_POLICY_NEVER);
    gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolled_window), GTK_SHADOW_IN);
    gtk_box_pack_start(GTK_BOX(vbox), GTK_WIDGET(scrolled_window), FALSE, FALSE, 0);
    g_signal_connect(gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW(scrolled_window)), "changed", G_CALLBACK(scroll_changed_cb), window);
    g_signal_connect(gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW(scrolled_window)), "value-changed", G_CALLBACK(scroll_value_changed_cb), window);
    window->priv->right_aligned = TRUE;
    gtk_widget_show(scrolled_window);

    window->priv->display = math_display_new_with_equation(window->priv->equation);
    gtk_container_add(GTK_CONTAINER(scrolled_window), GTK_WIDGET(window->priv->display));
    gtk_widget_show(GTK_WIDGET(window->priv->display));

    window->priv->buttons = math_buttons_new(window->priv->equation);
    g_signal_connect(window->priv->buttons, "notify::mode", G_CALLBACK(button_mode_changed_cb), window);
    button_mode_changed_cb(window->priv->buttons, NULL, window);
    gtk_box_pack_start(GTK_BOX(vbox), GTK_WIDGET(window->priv->buttons), FALSE, FALSE, 0);
    gtk_widget_show(GTK_WIDGET(window->priv->buttons));
}

static void
math_window_set_property(GObject      *object,
                         guint         prop_id,
                         const GValue *value,
                         GParamSpec   *pspec)
{
    MathWindow *self;

    self = MATH_WINDOW(object);

    switch (prop_id) {
    case PROP_EQUATION:
        self->priv->equation = g_value_get_object(value);
        create_gui(self);
        break;
    case PROP_SHOW_HISTORY:
        math_window_set_show_history(self, g_value_get_boolean(value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

static void
math_window_get_property(GObject    *object,
                         guint       prop_id,
                         GValue     *value,
                         GParamSpec *pspec)
{
    MathWindow *self;

    self = MATH_WINDOW(object);

    switch (prop_id) {
    case PROP_EQUATION:
        g_value_set_object(value, self->priv->equation);
        break;
    case PROP_SHOW_HISTORY:
        g_value_set_boolean(value, math_window_get_show_history(self));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

static void
math_window_dispose(GObject *object)
{
    MathWindow *window = MATH_WINDOW(object);

    g_clear_object(&window->priv->settings);

    G_OBJECT_CLASS(math_window_parent_class)->dispose(object);
}

static void
math_window_class_init(MathWindowClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS(klass);

    object_class->get_property = math_window_get_property;
    object_class->set_property = math_window_set_property;
    object_class->dispose = math_window_dispose;

    g_object_class_install_property(object_class,
                                    PROP_EQUATION,
                                    g_param_spec_object("equation",
                                                        "equation",
                                                        "Equation being calculated",
                                                        math_equation_get_type(),
                                                        G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));

    g_object_class_install_property(object_class,
                                    PROP_SHOW_HISTORY,
                                    g_param_spec_boolean("show-history",
                                                         "show-history",
                                                         "Show-history",
                                                         FALSE,
                                                         G_PARAM_READWRITE));
}

static void
math_window_init(MathWindow *window)
{
    window->priv = math_window_get_instance_private(window);
    gtk_window_set_title(GTK_WINDOW(window),
                         /* Title of main window */
                         _("Calculator"));
    gtk_window_set_icon_name(GTK_WINDOW(window), "accessories-calculator");
    gtk_window_set_role(GTK_WINDOW(window), "mate-calc");
    gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
    g_signal_connect_after(G_OBJECT(window), "key-press-event", G_CALLBACK(key_press_cb), NULL);
}