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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *   Michael Zucchi <notzed@ximian.com>
 *   Jonathon Jongsma <jonathon.jongsma@collabora.co.uk>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 * Copyright (C) 2009 Intel Corporation
 */

#include "e-alert-dialog.h"
#include "e-util.h"

G_DEFINE_TYPE (EAlertDialog, e_alert_dialog, GTK_TYPE_DIALOG)

#define ALERT_DIALOG_PRIVATE(o) \
        (G_TYPE_INSTANCE_GET_PRIVATE ((o), E_TYPE_ALERT_DIALOG, EAlertDialogPrivate))

struct _EAlertDialogPrivate
{
    GtkWindow *parent;
    EAlert *alert;
};

enum
{
    PROP_0,
    PROP_PARENT,
    PROP_ALERT
};

static void
e_alert_dialog_set_property (GObject *object, guint property_id,
                 const GValue *value, GParamSpec *pspec)
{
    EAlertDialog *dialog = (EAlertDialog*) object;

    switch (property_id)
    {
        case PROP_PARENT:
            dialog->priv->parent = g_value_dup_object (value);
            break;
        case PROP_ALERT:
            dialog->priv->alert = g_value_dup_object (value);
            break;
        default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
    }
}

static void
e_alert_dialog_get_property (GObject *object, guint property_id,
                 GValue *value, GParamSpec *pspec)
{
    EAlertDialog *dialog = (EAlertDialog*) object;

    switch (property_id)
    {
        case PROP_PARENT:
            g_value_set_object (value, dialog->priv->parent);
            break;
        case PROP_ALERT:
            g_value_set_object (value, dialog->priv->alert);
            break;
        default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
    }
}

static void
e_alert_dialog_dispose (GObject *object)
{
    EAlertDialog *dialog = (EAlertDialog*) object;

    if (dialog->priv->parent) {
        g_object_unref (dialog->priv->parent);
        dialog->priv->parent = NULL;
    }

    if (dialog->priv->alert) {
        g_object_unref (dialog->priv->alert);
        dialog->priv->alert = NULL;
    }

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

static void
dialog_response_cb(GtkWidget *w, guint button, gpointer user_data)
{
    EAlertDialogPrivate *priv = ALERT_DIALOG_PRIVATE (w);

    if (button == GTK_RESPONSE_HELP) {
        g_signal_stop_emission_by_name(w, "response");
        e_display_help (GTK_WINDOW (w), e_alert_peek_help_uri (priv->alert));
    }
}

static void
e_alert_dialog_init (EAlertDialog *self)
{
    self->priv = ALERT_DIALOG_PRIVATE (self);
}

static void
e_alert_dialog_constructed (GObject *obj)
{
    EAlertDialog *self = (EAlertDialog*) obj;
    EAlert *alert;
    struct _e_alert_button *b;
    GtkWidget *hbox, *w, *scroll=NULL;
    GtkWidget *action_area;
    GtkWidget *content_area;
    GString *out;
    gchar *title, *primary, *secondary;

    g_return_if_fail (self != NULL);

    self->priv = ALERT_DIALOG_PRIVATE (self);
    alert = self->priv->alert;

    action_area = gtk_dialog_get_action_area ((GtkDialog*) self);
    content_area = gtk_dialog_get_content_area ((GtkDialog*) self);

    gtk_dialog_set_has_separator((GtkDialog*) self, FALSE);

    gtk_widget_ensure_style ((GtkWidget *)self);
    gtk_container_set_border_width (GTK_CONTAINER (action_area), 12);
    gtk_container_set_border_width (GTK_CONTAINER (content_area), 0);

    if (self->priv->parent)
        gtk_window_set_transient_for ((GtkWindow *)self, self->priv->parent);
    else
        g_warning (
            "Something called %s() with a NULL parent window.  "
            "This is no longer legal, please fix it.", G_STRFUNC);

    if (e_alert_get_flags (alert) & GTK_DIALOG_MODAL)
        gtk_window_set_modal((GtkWindow *)self, TRUE);
    gtk_window_set_destroy_with_parent((GtkWindow *)self, TRUE);

    if (e_alert_peek_help_uri (alert)) {
        w = gtk_dialog_add_button((GtkDialog*) self, GTK_STOCK_HELP, GTK_RESPONSE_HELP);
        g_signal_connect(self, "response", G_CALLBACK(dialog_response_cb), NULL);
    }

    b = e_alert_peek_buttons (alert);
    if (b == NULL) {
        gtk_dialog_add_button((GtkDialog*) self, GTK_STOCK_OK, GTK_RESPONSE_OK);
    } else {
        for (; b; b=b->next) {
            if (b->stock) {
                if (b->label) {
#if 0
                    /* FIXME: So although this looks like it will work, it wont.
                       Need to do it the hard way ... it also breaks the
                       default_response stuff */
                    w = gtk_button_new_from_stock(b->stock);
                    gtk_button_set_label((GtkButton *)w, b->label);
                    gtk_widget_show(w);
                    gtk_dialog_add_action_widget(self, w, b->response);
#endif
                    gtk_dialog_add_button((GtkDialog*) self, b->label, b->response);
                } else
                    gtk_dialog_add_button((GtkDialog*) self, b->stock, b->response);
            } else
                gtk_dialog_add_button((GtkDialog*) self, b->label, b->response);
        }
    }

    if (e_alert_get_default_response (alert))
        gtk_dialog_set_default_response((GtkDialog*) self,
                        e_alert_get_default_response (alert));

    hbox = gtk_hbox_new(FALSE, 0);
    gtk_container_set_border_width((GtkContainer *)hbox, 12);

    w = gtk_image_new_from_stock
        (e_alert_peek_stock_image (alert), GTK_ICON_SIZE_DIALOG);
    gtk_misc_set_alignment((GtkMisc *)w, 0.0, 0.0);
    gtk_box_pack_start((GtkBox *)hbox, w, FALSE, FALSE, 12);

    title = e_alert_get_title (alert);
    gtk_window_set_title((GtkWindow *)self, title);

    out = g_string_new ("");
    primary = e_alert_get_primary_text (alert);
    if (primary) {
        g_string_append_printf (out,
                    "<span weight=\"bold\" size=\"larger\">%s</span>\n\n",
                    primary);
    }

    secondary = e_alert_get_secondary_text (alert);
    if (secondary) {
        g_string_append (out, secondary);
    }

    g_free (secondary);
    g_free (title);
    g_free (primary);

    if (e_alert_get_scroll (alert)) {
        scroll = gtk_scrolled_window_new (NULL, NULL);
        gtk_scrolled_window_set_policy ((GtkScrolledWindow *)scroll, GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
    }
    w = gtk_label_new(NULL);
    gtk_label_set_selectable((GtkLabel *)w, TRUE);
    gtk_label_set_line_wrap((GtkLabel *)w, TRUE);
    gtk_label_set_markup((GtkLabel *)w, out->str);
    GTK_WIDGET_UNSET_FLAGS (w, GTK_CAN_FOCUS);
    g_string_free(out, TRUE);
    if (e_alert_get_scroll (alert)) {
        gtk_scrolled_window_add_with_viewport ((GtkScrolledWindow *)scroll, w);
        gtk_box_pack_start((GtkBox *)hbox, scroll, FALSE, FALSE, 0);
        gtk_window_set_default_size ((GtkWindow *)self, 360, 180);
    } else
        gtk_box_pack_start((GtkBox *)hbox, w, TRUE, TRUE, 0);

    gtk_widget_show_all(hbox);

    gtk_box_pack_start (GTK_BOX (content_area), hbox, TRUE, TRUE, 0);
}

static void
e_alert_dialog_class_init (EAlertDialogClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    g_type_class_add_private (klass, sizeof (EAlertDialogPrivate));

    object_class->dispose = e_alert_dialog_dispose;
    object_class->get_property = e_alert_dialog_get_property;
    object_class->set_property = e_alert_dialog_set_property;
    object_class->constructed = e_alert_dialog_constructed;

    g_object_class_install_property (object_class,
                     PROP_PARENT,
                     g_param_spec_object ("parent",
                                  "parent window",
                                  "A parent window to be transient for",
                                  GTK_TYPE_WINDOW,
                                  G_PARAM_READWRITE |
                                  G_PARAM_CONSTRUCT_ONLY |
                                  G_PARAM_STATIC_STRINGS));
    g_object_class_install_property (object_class,
                     PROP_ALERT,
                     g_param_spec_object ("alert",
                                 "alert",
                                 "EAlert to be displayed",
                                 E_TYPE_ALERT,
                                  G_PARAM_READWRITE |
                                 G_PARAM_CONSTRUCT_ONLY |
                                 G_PARAM_STATIC_STRINGS));
}


GtkWidget*
e_alert_dialog_new (GtkWindow *parent, EAlert *alert)
{
    return (GtkWidget*) g_object_new (E_TYPE_ALERT_DIALOG, "parent", parent, "alert", alert, NULL);
}

GtkWidget*
e_alert_dialog_new_for_args (GtkWindow *parent, const gchar *tag, const gchar *arg0, ...)
{
    GtkWidget *d;
    EAlert *e;
    va_list ap;

    va_start(ap, arg0);
    e = e_alert_new_valist(tag, arg0, ap);
    va_end(ap);

    d = e_alert_dialog_new (parent, e);
    g_object_unref (e);

    return d;
}


gint
e_alert_run_dialog(GtkWindow *parent, EAlert *alert)
{
    GtkWidget *dialog;
    gint res;

    dialog = e_alert_dialog_new (parent, alert);

    res = gtk_dialog_run((GtkDialog *)dialog);
    gtk_widget_destroy(dialog);

    return res;
}

gint
e_alert_run_dialog_for_args (GtkWindow *parent, const gchar *tag, const gchar *arg0, ...)
{
    EAlert *e;
    va_list ap;
    gint response;

    va_start(ap, arg0);
    e = e_alert_new_valist(tag, arg0, ap);
    va_end(ap);

    response = e_alert_run_dialog (parent, e);
    g_object_unref (e);

    return response;
}

/**
 * e_alert_dialog_count_buttons:
 * @dialog: a #EAlertDialog
 *
 * Counts the number of buttons in @dialog's action area.
 *
 * Returns: number of action area buttons
 **/
guint
e_alert_dialog_count_buttons (EAlertDialog *dialog)
{
    GtkWidget *container;
    GList *children, *iter;
    guint n_buttons = 0;

    g_return_val_if_fail (E_IS_ALERT_DIALOG (dialog), 0);

    container = gtk_dialog_get_action_area ((GtkDialog*) dialog);
    children = gtk_container_get_children (GTK_CONTAINER (container));

    /* Iterate over the children looking for buttons. */
    for (iter = children; iter != NULL; iter = iter->next)
        if (GTK_IS_BUTTON (iter->data))
            n_buttons++;

    g_list_free (children);

    return n_buttons;
}

/**
 * e_alert_dialog_get_alert:
 * @dialog: a #EAlertDialog
 *
 * Convenience API for getting the #EAlert associated with @dialog
 *
 * Return value: the #EAlert associated with @dialog.  The alert should be
 * unreffed when no longer needed.
 */
EAlert *
e_alert_dialog_get_alert (EAlertDialog *dialog)
{
    EAlert *alert = NULL;

    g_return_val_if_fail (dialog != NULL, NULL);

    g_object_get (dialog, "alert", &alert,
              NULL);
    return alert;
}