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

/* eel-alert-dialog.c: An HIG compliant alert dialog.

   The Mate Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The Mate Library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the Mate Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.

*/
#include <config.h>

#include "eel-alert-dialog.h"
#include "eel-i18n.h"
#include "eel-gtk-macros.h"
#include <gtk/gtk.h>
#include <string.h>

enum
{
    PROP_0,
    PROP_ALERT_TYPE,
    PROP_BUTTONS
};

struct _EelAlertDialogDetails
{
    GtkWidget *image;
    GtkWidget *primary_label;
    GtkWidget *secondary_label;
    GtkWidget *details_expander;
    GtkWidget *details_label;
    GtkMessageType type;
};


static gpointer parent_class;

static void eel_alert_dialog_finalize     (GObject             *object);
static void eel_alert_dialog_class_init   (EelAlertDialogClass *klass);
static void eel_alert_dialog_init         (EelAlertDialog      *dialog);
static void eel_alert_dialog_style_set    (GtkWidget           *widget,
        GtkStyle            *prev_style);
static void eel_alert_dialog_set_property (GObject             *object,
        guint                prop_id,
        const GValue        *value,
        GParamSpec          *pspec);
static void eel_alert_dialog_get_property (GObject             *object,
        guint                prop_id,
        GValue              *value,
        GParamSpec          *pspec);
static void eel_alert_dialog_add_buttons  (EelAlertDialog      *alert_dialog,
        GtkButtonsType       buttons);

GType
eel_alert_dialog_get_type (void)
{
    static GType dialog_type = 0;

    if (!dialog_type)
    {

        const GTypeInfo dialog_info =
        {
            sizeof (EelAlertDialogClass),
            NULL,
            NULL,
            (GClassInitFunc) eel_alert_dialog_class_init,
            NULL,
            NULL,
            sizeof (EelAlertDialog),
            0,
            (GInstanceInitFunc) eel_alert_dialog_init,
        };

        dialog_type = g_type_register_static (GTK_TYPE_DIALOG, "EelAlertDialog",
                                              &dialog_info, 0);
    }
    return dialog_type;
}

static void
eel_alert_dialog_class_init (EelAlertDialogClass *class)
{
    GtkWidgetClass *widget_class;
    GObjectClass   *gobject_class;

    widget_class = GTK_WIDGET_CLASS (class);
    gobject_class = G_OBJECT_CLASS (class);

    parent_class = g_type_class_peek_parent (class);

    G_OBJECT_CLASS (class)->finalize = eel_alert_dialog_finalize;

    widget_class->style_set = eel_alert_dialog_style_set;

    gobject_class->set_property = eel_alert_dialog_set_property;
    gobject_class->get_property = eel_alert_dialog_get_property;

    gtk_widget_class_install_style_property (widget_class,
            g_param_spec_int ("alert_border",
                              _("Image/label border"),
                              _("Width of border around the label and image in the alert dialog"),
                              0,
                              G_MAXINT,
                              5,
                              G_PARAM_READABLE));

    g_object_class_install_property (gobject_class,
                                     PROP_ALERT_TYPE,
                                     g_param_spec_enum ("alert_type",
                                             _("Alert Type"),
                                             _("The type of alert"),
                                             GTK_TYPE_MESSAGE_TYPE,
                                             GTK_MESSAGE_INFO,
                                             G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT));

    g_object_class_install_property (gobject_class,
                                     PROP_BUTTONS,
                                     g_param_spec_enum ("buttons",
                                             _("Alert Buttons"),
                                             _("The buttons shown in the alert dialog"),
                                             GTK_TYPE_BUTTONS_TYPE,
                                             GTK_BUTTONS_NONE,
                                             G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
}

static void
eel_alert_dialog_finalize (GObject *object)
{
    EelAlertDialog *dialog;

    dialog = EEL_ALERT_DIALOG (object);

    g_free (dialog->details);

    EEL_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
}


static void
eel_alert_dialog_init (EelAlertDialog *dialog)
{
    GtkWidget *hbox;
    GtkWidget *vbox;
    GtkWidget *expander;

    dialog->details = g_new0 (EelAlertDialogDetails, 1);

    dialog->details->primary_label = gtk_label_new (NULL);
    dialog->details->secondary_label = gtk_label_new (NULL);
    dialog->details->details_label = gtk_label_new (NULL);
    dialog->details->image = gtk_image_new_from_stock (NULL, GTK_ICON_SIZE_DIALOG);
    gtk_misc_set_alignment (GTK_MISC (dialog->details->image), 0.5, 0.0);

    gtk_label_set_line_wrap (GTK_LABEL (dialog->details->primary_label), TRUE);
    gtk_label_set_selectable (GTK_LABEL (dialog->details->primary_label), TRUE);
    gtk_label_set_use_markup (GTK_LABEL (dialog->details->primary_label), TRUE);
    gtk_misc_set_alignment (GTK_MISC (dialog->details->primary_label), 0.0, 0.5);

    gtk_label_set_line_wrap (GTK_LABEL (dialog->details->secondary_label), TRUE);
    gtk_label_set_selectable (GTK_LABEL (dialog->details->secondary_label), TRUE);
    gtk_misc_set_alignment (GTK_MISC (dialog->details->secondary_label), 0.0, 0.5);

    gtk_label_set_line_wrap (GTK_LABEL (dialog->details->details_label), TRUE);
    gtk_label_set_selectable (GTK_LABEL (dialog->details->details_label), TRUE);
    gtk_misc_set_alignment (GTK_MISC (dialog->details->details_label), 0.0, 0.5);

    hbox = gtk_hbox_new (FALSE, 12);
    gtk_container_set_border_width (GTK_CONTAINER (hbox), 5);

    gtk_box_pack_start (GTK_BOX (hbox), dialog->details->image,
                        FALSE, FALSE, 0);

    vbox = gtk_vbox_new (FALSE, 12);

    gtk_box_pack_start (GTK_BOX (hbox), vbox,
                        FALSE, FALSE, 0);

    gtk_box_pack_start (GTK_BOX (vbox), dialog->details->primary_label,
                        FALSE, FALSE, 0);

    gtk_box_pack_start (GTK_BOX (vbox), dialog->details->secondary_label,
                        FALSE, FALSE, 0);

    expander = gtk_expander_new_with_mnemonic (_("Show more _details"));
    dialog->details->details_expander = expander;
    gtk_expander_set_spacing (GTK_EXPANDER (expander), 6);
    gtk_container_add (GTK_CONTAINER (expander), dialog->details->details_label);

    gtk_box_pack_start (GTK_BOX (vbox), expander,
                        FALSE, FALSE, 0);


    gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), hbox,
                        FALSE, FALSE, 0);

    gtk_widget_show_all (hbox);
    gtk_widget_hide (expander);

}

static void
setup_type (EelAlertDialog *dialog,
            GtkMessageType  type)
{
    const gchar *stock_id = NULL;
    GtkStockItem item;

    switch (type)
    {
    case GTK_MESSAGE_INFO:
        stock_id = GTK_STOCK_DIALOG_INFO;
        break;
    case GTK_MESSAGE_QUESTION:
        stock_id = GTK_STOCK_DIALOG_QUESTION;
        break;
    case GTK_MESSAGE_WARNING:
        stock_id = GTK_STOCK_DIALOG_WARNING;
        break;
    case GTK_MESSAGE_ERROR:
        stock_id = GTK_STOCK_DIALOG_ERROR;
        break;
    default:
        g_warning ("Unknown GtkMessageType %d", type);
        break;
    }

    if (stock_id == NULL)
    {
        stock_id = GTK_STOCK_DIALOG_INFO;
    }

    if (gtk_stock_lookup (stock_id, &item))
    {
        gtk_image_set_from_stock (GTK_IMAGE (dialog->details->image), stock_id,
                                  GTK_ICON_SIZE_DIALOG);
    }
    else
    {
        g_warning ("Stock dialog ID doesn't exist?");
    }
}

static void
eel_alert_dialog_set_property (GObject      *object,
                               guint         prop_id,
                               const GValue *value,
                               GParamSpec   *pspec)
{
    EelAlertDialog *dialog;

    dialog = EEL_ALERT_DIALOG (object);

    switch (prop_id)
    {
    case PROP_ALERT_TYPE:
        dialog->details->type = g_value_get_enum (value);
        setup_type (dialog, dialog->details->type);
        break;
    case PROP_BUTTONS:
        eel_alert_dialog_add_buttons (dialog, g_value_get_enum (value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
        break;
    }
}

static void
eel_alert_dialog_get_property (GObject     *object,
                               guint        prop_id,
                               GValue      *value,
                               GParamSpec  *pspec)
{
    EelAlertDialog *dialog;

    dialog = EEL_ALERT_DIALOG (object);

    switch (prop_id)
    {
    case PROP_ALERT_TYPE:
        g_value_set_enum (value, dialog->details->type);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
        break;
    }
}

void
eel_alert_dialog_set_primary_label (EelAlertDialog *dialog,
                                    const gchar *message)
{
    gchar *markup_str;
    char *escaped_message;

    if (message != NULL)
    {
        escaped_message = g_markup_escape_text (message, -1);
        markup_str = g_strconcat ("<span weight=\"bold\" size=\"larger\">", escaped_message, "</span>", NULL);
        gtk_label_set_markup (GTK_LABEL (EEL_ALERT_DIALOG (dialog)->details->primary_label),
                              markup_str);
        g_free (markup_str);
        g_free (escaped_message);
    }
}

void
eel_alert_dialog_set_secondary_label (EelAlertDialog *dialog,
                                      const gchar *message)
{
    if (message != NULL)
    {
        gtk_label_set_text (GTK_LABEL (EEL_ALERT_DIALOG (dialog)->details->secondary_label),
                            message);
    }
    else
    {
        gtk_widget_hide (EEL_ALERT_DIALOG (dialog)->details->secondary_label);
    }
}

void
eel_alert_dialog_set_details_label (EelAlertDialog *dialog,
                                    const gchar    *message)
{
    if (message != NULL)
    {
        gtk_widget_show (dialog->details->details_expander);
        gtk_label_set_text (GTK_LABEL (dialog->details->details_label), message);
    }
    else
    {
        gtk_widget_hide (dialog->details->details_expander);
    }
}


GtkWidget*
eel_alert_dialog_new (GtkWindow     *parent,
                      GtkDialogFlags flags,
                      GtkMessageType type,
                      GtkButtonsType buttons,
                      const gchar   *primary_message,
                      const gchar   *secondary_message)
{
    GtkWidget *widget;
    GtkDialog *dialog;

    g_return_val_if_fail (parent == NULL || GTK_IS_WINDOW (parent), NULL);

    widget = g_object_new (EEL_TYPE_ALERT_DIALOG,
                           "alert_type", type,
                           "buttons", buttons,
                           NULL);
    atk_object_set_role (gtk_widget_get_accessible (widget), ATK_ROLE_ALERT);

    dialog = GTK_DIALOG (widget);

    gtk_container_set_border_width (GTK_CONTAINER (dialog), 5);
    gtk_box_set_spacing (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), 14);
    gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
    gtk_dialog_set_has_separator (dialog, FALSE);

    /* Make sure we don't get a window title.
         * HIG says that alert dialogs should not have window title
         */
    gtk_window_set_title (GTK_WINDOW (dialog), "");
    gtk_window_set_skip_taskbar_hint (GTK_WINDOW (dialog), TRUE);

    eel_alert_dialog_set_primary_label (EEL_ALERT_DIALOG (dialog),
                                        primary_message);

    eel_alert_dialog_set_secondary_label (EEL_ALERT_DIALOG (dialog),
                                          secondary_message);

    if (parent != NULL)
    {
        gtk_window_set_transient_for (GTK_WINDOW (widget),
                                      GTK_WINDOW (parent));
    }

    if (flags & GTK_DIALOG_MODAL)
    {
        gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
    }

    if (flags & GTK_DIALOG_DESTROY_WITH_PARENT)
    {
        gtk_window_set_destroy_with_parent (GTK_WINDOW (dialog), TRUE);
    }
    return widget;
}

static void
eel_alert_dialog_add_buttons (EelAlertDialog* alert_dialog,
                              GtkButtonsType  buttons)
{
    GtkDialog* dialog;

    dialog = GTK_DIALOG (alert_dialog);

    switch (buttons)
    {
    case GTK_BUTTONS_NONE:
        break;
    case GTK_BUTTONS_OK:
        gtk_dialog_add_button (dialog,
                               GTK_STOCK_OK,
                               GTK_RESPONSE_OK);
        gtk_dialog_set_default_response (dialog,
                                         GTK_RESPONSE_OK);
        break;
    case GTK_BUTTONS_CLOSE:
        gtk_dialog_add_button (dialog,
                               GTK_STOCK_CLOSE,
                               GTK_RESPONSE_CLOSE);
        gtk_dialog_set_default_response (dialog,
                                         GTK_RESPONSE_CLOSE);
        break;
    case GTK_BUTTONS_CANCEL:
        gtk_dialog_add_button (dialog,
                               GTK_STOCK_CANCEL,
                               GTK_RESPONSE_CANCEL);
        gtk_dialog_set_default_response (dialog,
                                         GTK_RESPONSE_CANCEL);
        break;
    case GTK_BUTTONS_YES_NO:
        gtk_dialog_add_button (dialog,
                               GTK_STOCK_NO,
                               GTK_RESPONSE_NO);
        gtk_dialog_add_button (dialog,
                               GTK_STOCK_YES,
                               GTK_RESPONSE_YES);
        gtk_dialog_set_default_response (dialog,
                                         GTK_RESPONSE_YES);
        break;
    case GTK_BUTTONS_OK_CANCEL:
        gtk_dialog_add_button (dialog,
                               GTK_STOCK_CANCEL,
                               GTK_RESPONSE_CANCEL);
        gtk_dialog_add_button (dialog,
                               GTK_STOCK_OK,
                               GTK_RESPONSE_OK);
        gtk_dialog_set_default_response (dialog,
                                         GTK_RESPONSE_OK);
        break;
    default:
        g_warning ("Unknown GtkButtonsType");
        break;
    }
    g_object_notify (G_OBJECT (alert_dialog), "buttons");
}

static void
eel_alert_dialog_style_set (GtkWidget *widget,
                            GtkStyle  *prev_style)
{
    GtkWidget *parent;
    gint border_width;

    border_width = 0;

    parent = GTK_WIDGET (gtk_widget_get_parent (EEL_ALERT_DIALOG (widget)->details->image));

    if (parent != NULL)
    {
        gtk_widget_style_get (widget, "alert_border",
                              &border_width, NULL);

        gtk_container_set_border_width (GTK_CONTAINER (parent),
                                        border_width);
    }

    if (GTK_WIDGET_CLASS (parent_class)->style_set)
    {
        (GTK_WIDGET_CLASS (parent_class)->style_set) (widget, prev_style);
    }
}