/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2013 Red Hat, Inc.
 */

/**
 * SECTION:nmt-newt-container
 * @short_description: Base class for containers
 *
 * #NmtNewtContainer is the base class for #NmtNewtWidgets that
 * contain other widgets.
 *
 * #NmtNewtGrid is the most generic container type.
 */

#include "libnm/nm-default-client.h"

#include "nmt-newt-container.h"

#include "nmt-newt-component.h"

G_DEFINE_ABSTRACT_TYPE(NmtNewtContainer, nmt_newt_container, NMT_TYPE_NEWT_WIDGET)

#define NMT_NEWT_CONTAINER_GET_PRIVATE(o) \
    (G_TYPE_INSTANCE_GET_PRIVATE((o), NMT_TYPE_NEWT_CONTAINER, NmtNewtContainerPrivate))

typedef struct {
    GPtrArray *children;

} NmtNewtContainerPrivate;

static void child_needs_rebuild(NmtNewtWidget *widget, gpointer user_data);

static void
nmt_newt_container_init(NmtNewtContainer *container)
{
    NmtNewtContainerPrivate *priv = NMT_NEWT_CONTAINER_GET_PRIVATE(container);

    priv->children = g_ptr_array_new();
}

static void
nmt_newt_container_finalize(GObject *object)
{
    NmtNewtContainer *       container = NMT_NEWT_CONTAINER(object);
    NmtNewtContainerPrivate *priv      = NMT_NEWT_CONTAINER_GET_PRIVATE(object);

    while (priv->children->len)
        nmt_newt_container_remove(container, priv->children->pdata[0]);

    G_OBJECT_CLASS(nmt_newt_container_parent_class)->finalize(object);
}

static void
nmt_newt_container_realize(NmtNewtWidget *widget)
{
    NmtNewtContainerPrivate *priv = NMT_NEWT_CONTAINER_GET_PRIVATE(widget);
    int                      i;

    for (i = 0; i < priv->children->len; i++)
        nmt_newt_widget_realize(priv->children->pdata[i]);
}

static void
nmt_newt_container_unrealize(NmtNewtWidget *widget)
{
    NmtNewtContainerPrivate *priv = NMT_NEWT_CONTAINER_GET_PRIVATE(widget);
    int                      i;

    for (i = 0; i < priv->children->len; i++)
        nmt_newt_widget_unrealize(priv->children->pdata[i]);
}

static void
child_needs_rebuild(NmtNewtWidget *widget, gpointer user_data)
{
    NmtNewtWidget *container = user_data;

    nmt_newt_widget_needs_rebuild(container);
}

static void
nmt_newt_container_real_child_validity_changed(NmtNewtContainer *container, NmtNewtWidget *widget)
{
    NmtNewtContainerPrivate *priv;
    int                      i;

    if (widget) {
        if (!nmt_newt_widget_get_visible(widget))
            return;
        if (!nmt_newt_widget_get_valid(widget)) {
            nmt_newt_widget_set_valid(NMT_NEWT_WIDGET(container), FALSE);
            return;
        }
    }

    priv = NMT_NEWT_CONTAINER_GET_PRIVATE(container);
    for (i = 0; i < priv->children->len; i++) {
        widget = priv->children->pdata[i];
        if (nmt_newt_widget_get_visible(widget) && !nmt_newt_widget_get_valid(widget)) {
            nmt_newt_widget_set_valid(NMT_NEWT_WIDGET(container), FALSE);
            return;
        }
    }

    nmt_newt_widget_set_valid(NMT_NEWT_WIDGET(container), TRUE);
}

static void
nmt_newt_container_child_validity_changed(NmtNewtContainer *container, NmtNewtWidget *widget)
{
    NMT_NEWT_CONTAINER_GET_CLASS(container)->child_validity_changed(container, widget);
}

static void
child_validity_notify(GObject *object, GParamSpec *pspec, gpointer container)
{
    nmt_newt_container_child_validity_changed(container, NMT_NEWT_WIDGET(object));
}

static void
nmt_newt_container_real_add(NmtNewtContainer *container, NmtNewtWidget *widget)
{
    NmtNewtContainerPrivate *priv = NMT_NEWT_CONTAINER_GET_PRIVATE(container);

    g_signal_connect(widget, "needs-rebuild", G_CALLBACK(child_needs_rebuild), container);
    g_signal_connect(widget, "notify::valid", G_CALLBACK(child_validity_notify), container);
    g_ptr_array_add(priv->children, g_object_ref_sink(widget));
    nmt_newt_widget_set_parent(widget, NMT_NEWT_WIDGET(container));

    nmt_newt_container_child_validity_changed(container, widget);
    nmt_newt_widget_needs_rebuild(NMT_NEWT_WIDGET(container));
}

static void
nmt_newt_container_real_remove(NmtNewtContainer *container, NmtNewtWidget *widget)
{
    NmtNewtContainerPrivate *priv = NMT_NEWT_CONTAINER_GET_PRIVATE(container);
    int                      i;

    for (i = 0; i < priv->children->len; i++) {
        if (widget == priv->children->pdata[i]) {
            g_ptr_array_remove_index(priv->children, i);
            g_signal_handlers_disconnect_by_func(widget,
                                                 G_CALLBACK(child_needs_rebuild),
                                                 container);
            g_signal_handlers_disconnect_by_func(widget,
                                                 G_CALLBACK(child_validity_notify),
                                                 container);
            nmt_newt_widget_set_parent(widget, NULL);
            g_object_unref(widget);

            nmt_newt_container_child_validity_changed(container, NULL);
            nmt_newt_widget_needs_rebuild(NMT_NEWT_WIDGET(container));
            return;
        }
    }
}

/**
 * nmt_newt_container_remove:
 * @container: the #NmtNewtContainer
 * @widget: the child to remove
 *
 * Removes @widget from @container.
 *
 * Note that there is not a corresponding
 * <literal>nmt_newt_container_add ()</literal>; you must use
 * container-type-specific methods to add widgets to containers.
 */
void
nmt_newt_container_remove(NmtNewtContainer *container, NmtNewtWidget *widget)
{
    NMT_NEWT_CONTAINER_GET_CLASS(container)->remove(container, widget);
}

static NmtNewtWidget *
nmt_newt_container_find_component(NmtNewtWidget *widget, newtComponent co)
{
    NmtNewtContainerPrivate *priv = NMT_NEWT_CONTAINER_GET_PRIVATE(widget);
    NmtNewtWidget *          found, *child;
    int                      i;

    for (i = 0; i < priv->children->len; i++) {
        child = priv->children->pdata[i];

        found = nmt_newt_widget_find_component(child, co);
        if (found)
            return found;
    }

    return NULL;
}

/**
 * nmt_newt_container_get_children:
 * @container: an #NmtNewtContainer
 *
 * Gets a list of @container's children.
 *
 * Returns: (transfer full): a list of @container's children.
 */
GSList *
nmt_newt_container_get_children(NmtNewtContainer *container)
{
    NmtNewtContainerPrivate *priv = NMT_NEWT_CONTAINER_GET_PRIVATE(container);
    GSList *                 ret;
    int                      i;

    for (i = 0, ret = NULL; i < priv->children->len; i++)
        ret = g_slist_prepend(ret, g_object_ref(priv->children->pdata[i]));
    return g_slist_reverse(ret);
}

static void
nmt_newt_container_class_init(NmtNewtContainerClass *container_class)
{
    GObjectClass *      object_class = G_OBJECT_CLASS(container_class);
    NmtNewtWidgetClass *widget_class = NMT_NEWT_WIDGET_CLASS(container_class);

    g_type_class_add_private(container_class, sizeof(NmtNewtContainerPrivate));

    /* virtual methods */
    object_class->finalize = nmt_newt_container_finalize;

    widget_class->realize        = nmt_newt_container_realize;
    widget_class->unrealize      = nmt_newt_container_unrealize;
    widget_class->find_component = nmt_newt_container_find_component;

    container_class->add                    = nmt_newt_container_real_add;
    container_class->remove                 = nmt_newt_container_real_remove;
    container_class->child_validity_changed = nmt_newt_container_real_child_validity_changed;
}
