// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2013 Red Hat, Inc.
*/
/**
* SECTION:nmt-widget-list
* @short_description: A list of widgets, with Add and Remove buttons
*
* #NmtWidgetList presents a homogeneous list of widgets, with "Remove"
* buttons next to each one, and an "Add" button at the button to add
* new ones.
*
* It is the base class for #NmtAddressList, and is used internally by
* #NmtRouteTable.
*
* FIXME: The way this works is sort of weird.
*/
#include "nm-default.h"
#include "nmt-widget-list.h"
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdlib.h>
#include "nmt-newt.h"
G_DEFINE_TYPE (NmtWidgetList, nmt_widget_list, NMT_TYPE_NEWT_GRID)
#define NMT_WIDGET_LIST_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NMT_TYPE_WIDGET_LIST, NmtWidgetListPrivate))
typedef struct {
int length;
NmtWidgetListCallback create_callback;
gpointer user_data;
GDestroyNotify destroy_notify;
NmtNewtWidget *empty_widget;
GPtrArray *widgets;
GPtrArray *remove_buttons;
NmtNewtWidget *add_button;
GBinding *add_sensitivity;
} NmtWidgetListPrivate;
enum {
PROP_0,
PROP_CREATE_CALLBACK,
PROP_USER_DATA,
PROP_DESTROY_NOTIFY,
PROP_EMPTY_WIDGET,
PROP_LENGTH,
LAST_PROP
};
enum {
ADD_CLICKED,
REMOVE_CLICKED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static void add_clicked (NmtNewtButton *button, gpointer user_data);
static void remove_clicked (NmtNewtButton *button, gpointer user_data);
/**
* NmtWidgetListCallback:
* @list: the #NmtWidgetList
* @n: the number of the widget being added
* @user_data: the callback's user data
*
* Called by #NmtWidgetList to ask for a new widget to be created.
*
* Note that the widget is not created to go with any particular
* value, but rather is created to be at a certain spot in the list.
* When an element is deleted from the list, it is actually always
* the last widget in the list that is removed, but it is assumed
* that the widget list is bound to some array-valued property, and
* so when an element is deleted from that array, the widgets will
* all update themselves automatically when the array changes.
*
* Returns: a new widget for the list
*/
/**
* nmt_widget_list_new:
* @create_callback: callback to create new widgets
* @user_data: user data for @create_callback
* @destroy_notify: #GDestroyNotify for @user_data
* @empty_widget: (allow-none): a widget to display when there are
* no "real" widgets in the list.
*
* Creates a new #NmtWidgetList.
*
* Returns: a new #NmtWidgetList.
*/
NmtNewtWidget *
nmt_widget_list_new (NmtWidgetListCallback create_callback,
gpointer user_data,
GDestroyNotify destroy_notify,
NmtNewtWidget *empty_widget)
{
return g_object_new (NMT_TYPE_WIDGET_LIST,
"create-callback", create_callback,
"user-data", user_data,
"destroy-notify", destroy_notify,
"empty-widget", empty_widget,
NULL);
}
static void
nmt_widget_list_init (NmtWidgetList *list)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (list);
priv->widgets = g_ptr_array_new ();
priv->remove_buttons = g_ptr_array_new ();
priv->add_button = nmt_newt_button_new (_("Add..."));
g_signal_connect (priv->add_button, "clicked",
G_CALLBACK (add_clicked), list);
nmt_newt_grid_add (NMT_NEWT_GRID (list), priv->add_button, 0, 0);
}
static void
nmt_widget_list_constructed (GObject *object)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (object);
if (priv->length == 0 && priv->empty_widget) {
nmt_newt_widget_set_visible (priv->empty_widget, TRUE);
nmt_newt_grid_move (NMT_NEWT_GRID (object), priv->add_button, 0, 1);
}
G_OBJECT_CLASS (nmt_widget_list_parent_class)->constructed (object);
}
static void
nmt_widget_list_finalize (GObject *object)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (object);
g_ptr_array_unref (priv->widgets);
g_ptr_array_unref (priv->remove_buttons);
if (priv->user_data && priv->destroy_notify)
priv->destroy_notify (priv->user_data);
g_clear_object (&priv->empty_widget);
G_OBJECT_CLASS (nmt_widget_list_parent_class)->finalize (object);
}
static void
ensure_widgets (NmtWidgetList *list)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (list);
NmtNewtWidget *widget, *button, *focus;
gboolean was_empty;
NmtNewtForm *form;
int i;
was_empty = priv->widgets->len == 0;
if (priv->length < priv->widgets->len) {
/* remove excess widgets */
for (i = priv->length; i < priv->widgets->len; i++) {
nmt_newt_container_remove (NMT_NEWT_CONTAINER (list), priv->widgets->pdata[i]);
nmt_newt_container_remove (NMT_NEWT_CONTAINER (list), priv->remove_buttons->pdata[i]);
}
g_ptr_array_set_size (priv->widgets, priv->length);
g_ptr_array_set_size (priv->remove_buttons, priv->length);
} else if (priv->length > priv->widgets->len) {
/* add new widgets */
for (i = priv->widgets->len; i < priv->length; i++) {
widget = NMT_WIDGET_LIST_GET_CLASS (list)->create_widget (list, i);
nmt_newt_grid_add (NMT_NEWT_GRID (list), widget, 0, i);
g_ptr_array_add (priv->widgets, widget);
button = nmt_newt_button_new (_("Remove"));
g_signal_connect (button, "clicked",
G_CALLBACK (remove_clicked), list);
nmt_newt_grid_add (NMT_NEWT_GRID (list), button, 1, i);
nmt_newt_widget_set_padding (button, 1, 0, 0, 0);
g_ptr_array_add (priv->remove_buttons, button);
}
} else
return;
if (priv->widgets->len == 0 && priv->empty_widget) {
nmt_newt_widget_set_visible (priv->empty_widget, TRUE);
nmt_newt_grid_move (NMT_NEWT_GRID (list), priv->add_button, 0, 1);
} else {
if (was_empty && priv->empty_widget)
nmt_newt_widget_set_visible (priv->empty_widget, FALSE);
nmt_newt_grid_move (NMT_NEWT_GRID (list), priv->add_button, 0, priv->length);
}
form = nmt_newt_widget_get_form (NMT_NEWT_WIDGET (list));
if (form) {
if (priv->widgets->len) {
if (was_empty)
focus = priv->widgets->pdata[0];
else
focus = priv->widgets->pdata[priv->widgets->len - 1];
} else
focus = priv->add_button;
nmt_newt_form_set_focus (form, focus);
}
g_clear_object (&priv->add_sensitivity);
if (priv->widgets->len) {
widget = priv->widgets->pdata[priv->widgets->len - 1];
priv->add_sensitivity = g_object_bind_property (widget, "valid",
priv->add_button, "sensitive",
G_BINDING_SYNC_CREATE);
g_object_add_weak_pointer (G_OBJECT (priv->add_sensitivity),
(gpointer *)&priv->add_sensitivity);
} else
nmt_newt_component_set_sensitive (NMT_NEWT_COMPONENT (priv->add_button), TRUE);
}
static void
add_clicked (NmtNewtButton *button, gpointer list)
{
g_signal_emit (G_OBJECT (list), signals[ADD_CLICKED], 0, NULL);
}
static void
remove_clicked (NmtNewtButton *button, gpointer list)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (list);
int i;
for (i = 0; i < priv->remove_buttons->len; i++) {
if (priv->remove_buttons->pdata[i] == (gpointer)button)
break;
}
g_return_if_fail (i < priv->remove_buttons->len);
g_signal_emit (G_OBJECT (list), signals[REMOVE_CLICKED], 0, i, NULL);
}
static NmtNewtWidget *
nmt_widget_list_real_create_widget (NmtWidgetList *list,
int n)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (list);
g_return_val_if_fail (priv->create_callback != NULL, NULL);
return priv->create_callback (list, n, priv->user_data);
}
/**
* nmt_widget_list_get_length:
* @list: the #NmtNewtWidgetList
*
* Gets the number of widgets in the list.
*
* Returns: the number of widgets in the list.
*/
int
nmt_widget_list_get_length (NmtWidgetList *list)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (list);
return priv->length;
}
/**
* nmt_widget_list_set_length:
* @list: the #NmtNewtWidgetList
* @length: the new length
*
* Changes the number of widgets in the list. Widgets will be added or
* deleted as necessary.
*/
void
nmt_widget_list_set_length (NmtWidgetList *list,
int length)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (list);
if (priv->length != length) {
priv->length = length;
g_object_notify (G_OBJECT (list), "length");
}
ensure_widgets (list);
}
static void
nmt_widget_list_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (object);
switch (prop_id) {
case PROP_CREATE_CALLBACK:
priv->create_callback = g_value_get_pointer (value);
break;
case PROP_USER_DATA:
priv->user_data = g_value_get_pointer (value);
break;
case PROP_DESTROY_NOTIFY:
priv->destroy_notify = g_value_get_pointer (value);
break;
case PROP_LENGTH:
priv->length = g_value_get_int (value);
ensure_widgets (NMT_WIDGET_LIST (object));
break;
case PROP_EMPTY_WIDGET:
priv->empty_widget = g_value_get_object (value);
if (priv->empty_widget) {
g_object_ref_sink (priv->empty_widget);
nmt_newt_grid_add (NMT_NEWT_GRID (object), priv->empty_widget, 0, 0);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
nmt_widget_list_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
NmtWidgetListPrivate *priv = NMT_WIDGET_LIST_GET_PRIVATE (object);
switch (prop_id) {
case PROP_CREATE_CALLBACK:
g_value_set_pointer (value, priv->create_callback);
break;
case PROP_USER_DATA:
g_value_set_pointer (value, priv->user_data);
break;
case PROP_DESTROY_NOTIFY:
g_value_set_pointer (value, priv->destroy_notify);
break;
case PROP_LENGTH:
g_value_set_int (value, priv->length);
break;
case PROP_EMPTY_WIDGET:
g_value_set_object (value, priv->empty_widget);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
nmt_widget_list_class_init (NmtWidgetListClass *list_class)
{
GObjectClass *object_class = G_OBJECT_CLASS (list_class);
g_type_class_add_private (list_class, sizeof (NmtWidgetListPrivate));
/* virtual methods */
object_class->constructed = nmt_widget_list_constructed;
object_class->set_property = nmt_widget_list_set_property;
object_class->get_property = nmt_widget_list_get_property;
object_class->finalize = nmt_widget_list_finalize;
list_class->create_widget = nmt_widget_list_real_create_widget;
/* signals */
/**
* NmtNewtWidget::add-clicked:
* @list: the #NmtNewtWidgetList
*
* Emitted when the user clicks the "Add" button. The caller can
* decide whether or not to add a new widget, and call
* nmt_widget_list_set_length() with the new length if so.
*
* FIXME: the "Add" button should be insensitive if it's
* not going to work.
*/
signals[ADD_CLICKED] =
g_signal_new ("add-clicked",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (NmtWidgetListClass, add_clicked),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
/**
* NmtNewtWidget::remove-clicked:
* @list: the #NmtNewtWidgetList
* @n: the widget being removed
*
* Emitted when the user clicks one of the "Remove" buttons. The
* caller can decide whether or not to remove the widget, and
* call nmt_widget_list_set_length() with the new length if so.
*
* FIXME: the "Remove" button should be insensitive if it's not
* going to work.
*/
signals[REMOVE_CLICKED] =
g_signal_new ("remove-clicked",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (NmtWidgetListClass, remove_clicked),
NULL, NULL, NULL,
G_TYPE_NONE, 1, G_TYPE_INT);
/* properties */
/**
* NmtWidgetList:create-callback:
*
* Callback called to create a new widget.
*/
g_object_class_install_property
(object_class, PROP_CREATE_CALLBACK,
g_param_spec_pointer ("create-callback", "", "",
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* NmtWidgetList:user-data:
*
* User data for #NmtWidgetList:create-callback
*/
g_object_class_install_property
(object_class, PROP_USER_DATA,
g_param_spec_pointer ("user-data", "", "",
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* NmtWidgetList:destroy-notify:
*
* #GDestroyNotify for #NmtWidgetList:user-data
*/
g_object_class_install_property
(object_class, PROP_DESTROY_NOTIFY,
g_param_spec_pointer ("destroy-notify", "", "",
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* NmtWidgetList:length:
*
* The length of the widget list; changing this value will add or
* remove widgets from the list.
*/
g_object_class_install_property
(object_class, PROP_LENGTH,
g_param_spec_int ("length", "", "",
0, G_MAXINT, 0,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* NmtWidgetList:empty-widget:
*
* If non-%NULL, this widget will be displayed when there are
* no "real" widgets in the list.
*/
g_object_class_install_property
(object_class, PROP_EMPTY_WIDGET,
g_param_spec_object ("empty-widget", "", "",
NMT_TYPE_NEWT_WIDGET,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
}