path: root/widgets/misc/e-popup-action.c

/*
 * e-popup-action.c
 *
 * 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/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "e-popup-action.h"

#include <glib/gi18n.h>

enum {
    PROP_0,
    PROP_RELATED_ACTION,
    PROP_USE_ACTION_APPEARANCE
};

struct _EPopupActionPrivate {
    GtkAction *related_action;
    gboolean use_action_appearance;
    gulong activate_handler_id;
    gulong notify_handler_id;
};

/* Forward Declarations */
static void e_popup_action_activatable_init (GtkActivatableIface *interface);

G_DEFINE_TYPE_WITH_CODE (
    EPopupAction,
    e_popup_action,
    GTK_TYPE_ACTION,
    G_IMPLEMENT_INTERFACE (
        GTK_TYPE_ACTIVATABLE,
        e_popup_action_activatable_init))

static void
popup_action_notify_cb (GtkAction *action,
                        GParamSpec *pspec,
                        GtkActivatable *activatable)
{
    GtkActivatableIface *iface;

    iface = GTK_ACTIVATABLE_GET_IFACE (activatable);
    g_return_if_fail (iface->update != NULL);

    iface->update (activatable, action, pspec->name);
}

static GtkAction *
popup_action_get_related_action (EPopupAction *popup_action)
{
    return popup_action->priv->related_action;
}

static void
popup_action_set_related_action (EPopupAction *popup_action,
                                 GtkAction *related_action)
{
    GtkActivatable *activatable;

    /* Do not call gtk_activatable_do_set_related_action() because
     * it assumes the activatable object is a widget and tries to add
     * it to the related actions's proxy list.  Instead we'll just do
     * the relevant steps manually. */

    activatable = GTK_ACTIVATABLE (popup_action);

    if (related_action == popup_action->priv->related_action)
        return;

    if (related_action != NULL)
        g_object_ref (related_action);

    if (popup_action->priv->related_action != NULL) {
        g_signal_handler_disconnect (
            popup_action,
            popup_action->priv->activate_handler_id);
        g_signal_handler_disconnect (
            popup_action->priv->related_action,
            popup_action->priv->notify_handler_id);
        popup_action->priv->activate_handler_id = 0;
        popup_action->priv->notify_handler_id = 0;
        g_object_unref (popup_action->priv->related_action);
    }

    popup_action->priv->related_action = related_action;

    if (related_action != NULL) {
        popup_action->priv->activate_handler_id =
            g_signal_connect_swapped (
                popup_action, "activate",
                G_CALLBACK (gtk_action_activate),
                related_action);
        popup_action->priv->notify_handler_id =
            g_signal_connect (
                related_action, "notify",
                G_CALLBACK (popup_action_notify_cb),
                popup_action);
        gtk_activatable_sync_action_properties (
            activatable, related_action);
    } else
        gtk_action_set_visible (GTK_ACTION (popup_action), FALSE);

    g_object_notify (G_OBJECT (popup_action), "related-action");
}

static gboolean
popup_action_get_use_action_appearance (EPopupAction *popup_action)
{
    return popup_action->priv->use_action_appearance;
}

static void
popup_action_set_use_action_appearance (EPopupAction *popup_action,
                                        gboolean use_action_appearance)
{
    GtkActivatable *activatable;
    GtkAction *related_action;

    popup_action->priv->use_action_appearance = use_action_appearance;

    g_object_notify (G_OBJECT (popup_action), "use-action-appearance");

    activatable = GTK_ACTIVATABLE (popup_action);
    related_action = popup_action_get_related_action (popup_action);
    gtk_activatable_sync_action_properties (activatable, related_action);
}

static void
popup_action_set_property (GObject *object,
                           guint property_id,
                           const GValue *value,
                           GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_RELATED_ACTION:
            popup_action_set_related_action (
                E_POPUP_ACTION (object),
                g_value_get_object (value));
            return;

        case PROP_USE_ACTION_APPEARANCE:
            popup_action_set_use_action_appearance (
                E_POPUP_ACTION (object),
                g_value_get_boolean (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
popup_action_get_property (GObject *object,
                           guint property_id,
                           GValue *value,
                           GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_RELATED_ACTION:
            g_value_set_object (
                value,
                popup_action_get_related_action (
                E_POPUP_ACTION (object)));
            return;

        case PROP_USE_ACTION_APPEARANCE:
            g_value_set_boolean (
                value,
                popup_action_get_use_action_appearance (
                E_POPUP_ACTION (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
popup_action_dispose (GObject *object)
{
    EPopupActionPrivate *priv;

    priv = E_POPUP_ACTION (object)->priv;

    if (priv->related_action != NULL) {
        g_signal_handler_disconnect (
            object,
            priv->activate_handler_id);
        g_signal_handler_disconnect (
            priv->related_action,
            priv->notify_handler_id);
        g_object_unref (priv->related_action);
        priv->related_action = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (e_popup_action_parent_class)->dispose (object);
}

static void
popup_action_update (GtkActivatable *activatable,
                     GtkAction *action,
                     const gchar *property_name)
{
    GObjectClass *class;
    GParamSpec *pspec;
    GValue *value;

    /* Ignore "action-group" changes" */
    if (strcmp (property_name, "action-group") == 0)
        return;

    /* Ignore "visible" changes. */
    if (strcmp (property_name, "visible") == 0)
        return;

    value = g_slice_new0 (GValue);
    class = G_OBJECT_GET_CLASS (action);
    pspec = g_object_class_find_property (class, property_name);
    g_value_init (value, pspec->value_type);

    g_object_get_property (G_OBJECT (action), property_name, value);

    if (strcmp (property_name, "sensitive") == 0)
        property_name = "visible";
    else if (!gtk_activatable_get_use_action_appearance (activatable))
        goto exit;

    g_object_set_property (G_OBJECT (activatable), property_name, value);

exit:
    g_value_unset (value);
    g_slice_free (GValue, value);
}

static void
popup_action_sync_action_properties (GtkActivatable *activatable,
                                     GtkAction *action)
{
    if (action == NULL)
        return;

    /* XXX GTK+ 2.18 is still missing accessor functions for
     *     "hide-if-empty" and "visible-overflown" properties.
     *     These are rarely used so we'll skip them for now. */

    /* A popup action is never shown as insensitive. */
    gtk_action_set_sensitive (GTK_ACTION (activatable), TRUE);

    gtk_action_set_visible (
        GTK_ACTION (activatable),
        gtk_action_get_sensitive (action));

    gtk_action_set_visible_horizontal (
        GTK_ACTION (activatable),
        gtk_action_get_visible_horizontal (action));

    gtk_action_set_visible_vertical (
        GTK_ACTION (activatable),
        gtk_action_get_visible_vertical (action));

    gtk_action_set_is_important (
        GTK_ACTION (activatable),
        gtk_action_get_is_important (action));

    if (!gtk_activatable_get_use_action_appearance (activatable))
        return;

    gtk_action_set_label (
        GTK_ACTION (activatable),
        gtk_action_get_label (action));

    gtk_action_set_short_label (
        GTK_ACTION (activatable),
        gtk_action_get_short_label (action));

    gtk_action_set_tooltip (
        GTK_ACTION (activatable),
        gtk_action_get_tooltip (action));

    gtk_action_set_stock_id (
        GTK_ACTION (activatable),
        gtk_action_get_stock_id (action));

    gtk_action_set_gicon (
        GTK_ACTION (activatable),
        gtk_action_get_gicon (action));

    gtk_action_set_icon_name (
        GTK_ACTION (activatable),
        gtk_action_get_icon_name (action));
}

static void
e_popup_action_class_init (EPopupActionClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (EPopupActionPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = popup_action_set_property;
    object_class->get_property = popup_action_get_property;
    object_class->dispose = popup_action_dispose;

    g_object_class_override_property (
        object_class,
        PROP_RELATED_ACTION,
        "related-action");

    g_object_class_override_property (
        object_class,
        PROP_USE_ACTION_APPEARANCE,
        "use-action-appearance");
}

static void
e_popup_action_init (EPopupAction *popup_action)
{
    popup_action->priv = G_TYPE_INSTANCE_GET_PRIVATE (
        popup_action, E_TYPE_POPUP_ACTION, EPopupActionPrivate);
    popup_action->priv->use_action_appearance = TRUE;

    /* Remain invisible until we have a related action. */
    gtk_action_set_visible (GTK_ACTION (popup_action), FALSE);
}

static void
e_popup_action_activatable_init (GtkActivatableIface *interface)
{
    interface->update = popup_action_update;
    interface->sync_action_properties = popup_action_sync_action_properties;
}

EPopupAction *
e_popup_action_new (const gchar *name)
{
    g_return_val_if_fail (name != NULL, NULL);

    return g_object_new (E_TYPE_POPUP_ACTION, "name", name, NULL);
}

void
e_action_group_add_popup_actions (GtkActionGroup *action_group,
                                  const EPopupActionEntry *entries,
                                  guint n_entries)
{
    guint ii;

    g_return_if_fail (GTK_IS_ACTION_GROUP (action_group));

    for (ii = 0; ii < n_entries; ii++) {
        EPopupAction *popup_action;
        GtkAction *related_action;
        const gchar *label;

        label = gtk_action_group_translate_string (
            action_group, entries[ii].label);

        related_action = gtk_action_group_get_action (
            action_group, entries[ii].related);

        if (related_action == NULL) {
            g_warning (
                "Related action '%s' not found in "
                "action group '%s'", entries[ii].related,
                gtk_action_group_get_name (action_group));
            continue;
        }

        popup_action = e_popup_action_new (entries[ii].name);

        gtk_activatable_set_related_action (
            GTK_ACTIVATABLE (popup_action), related_action);

        if (label != NULL && *label != '\0')
            gtk_action_set_label (
                GTK_ACTION (popup_action), label);

        gtk_action_group_add_action (
            action_group, GTK_ACTION (popup_action));

        g_object_unref (popup_action);
    }
}