/* poppler-layer.cc: glib interface to poppler

 *

 * Copyright (C) 2008 Carlos Garcia Campos <carlosgc@gnome.org>

 * Copyright (C) 2025 Albert Astals Cid <aacid@kde.org>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2, or (at your option)

 * any later version.

 *

 * 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.

 */

#include "poppler-layer.h"

#include "poppler-private.h"

/**

 * SECTION:poppler-layer

 * @short_description: Layers

 * @title: PopplerLayer

 */

struct _PopplerLayerClass

{

    GObjectClass parent_class;

};

using PopplerLayerClass = _PopplerLayerClass;

G_DEFINE_TYPE(PopplerLayer, poppler_layer, G_TYPE_OBJECT)

static void poppler_layer_finalize(GObject *object)

{

    PopplerLayer *poppler_layer = POPPLER_LAYER(object);

    if (poppler_layer->document) {

        g_object_unref(poppler_layer->document);

        poppler_layer->document = nullptr;

    }

    if (poppler_layer->title) {

        g_free(poppler_layer->title);

        poppler_layer->title = nullptr;

    }

    poppler_layer->layer = nullptr;

    poppler_layer->rbgroup = nullptr;

    G_OBJECT_CLASS(poppler_layer_parent_class)->finalize(object);

}

static void poppler_layer_init(PopplerLayer * /*layer*/) { }

static void poppler_layer_class_init(PopplerLayerClass *klass)

{

    GObjectClass *gobject_class = G_OBJECT_CLASS(klass);

    gobject_class->finalize = poppler_layer_finalize;

}

PopplerLayer *_poppler_layer_new(PopplerDocument *document, Layer *layer, GList *rbgroup)

{

    PopplerLayer *poppler_layer;

    const GooString *layer_name;

    g_return_val_if_fail(POPPLER_IS_DOCUMENT(document), NULL);

    g_return_val_if_fail(layer != nullptr, NULL);

    poppler_layer = POPPLER_LAYER(g_object_new(POPPLER_TYPE_LAYER, nullptr));

    poppler_layer->document = (PopplerDocument *)g_object_ref(document);

    poppler_layer->layer = layer;

    poppler_layer->rbgroup = rbgroup;

    layer_name = layer->oc->getName();

    poppler_layer->title = layer_name ? _poppler_goo_string_to_utf8(layer_name) : nullptr;

    return poppler_layer;

}

/**

 * poppler_layer_get_title:

 * @layer: a #PopplerLayer

 *

 * Returns the name of the layer suitable for

 * presentation as a title in a viewer's GUI

 *

 * Return value: a string containing the title of the layer

 *

 * Since: 0.12

 **/

const gchar *poppler_layer_get_title(PopplerLayer *poppler_layer)

{

    g_return_val_if_fail(POPPLER_IS_LAYER(poppler_layer), NULL);

    return poppler_layer->title;

}

/**

 * poppler_layer_is_visible:

 * @layer: a #PopplerLayer

 *

 * Returns whether @layer is visible

 *

 * Return value: %TRUE if @layer is visible

 *

 * Since: 0.12

 **/

gboolean poppler_layer_is_visible(PopplerLayer *poppler_layer)

{

    g_return_val_if_fail(POPPLER_IS_LAYER(poppler_layer), FALSE);

    return poppler_layer->layer->oc->getState() == OptionalContentGroup::On;

}

/**

 * poppler_layer_show:

 * @layer: a #PopplerLayer

 *

 * Shows @layer

 *

 * Since: 0.12

 **/

void poppler_layer_show(PopplerLayer *poppler_layer)

{

    GList *l;

    Layer *layer;

    g_return_if_fail(POPPLER_IS_LAYER(poppler_layer));

    layer = poppler_layer->layer;

    if (layer->oc->getState() == OptionalContentGroup::On) {

        return;

    }

    layer->oc->setState(OptionalContentGroup::On);

    for (l = poppler_layer->rbgroup; l && l->data; l = g_list_next(l)) {

        auto *oc = (OptionalContentGroup *)l->data;

        if (oc != layer->oc) {

            oc->setState(OptionalContentGroup::Off);

        }

    }

}

/**

 * poppler_layer_hide:

 * @layer: a #PopplerLayer

 *

 * Hides @layer. If @layer is the parent of other nested layers,

 * such layers will be also hidden and will be blocked until @layer

 * is shown again

 *

 * Since: 0.12

 **/

void poppler_layer_hide(PopplerLayer *poppler_layer)

{

    Layer *layer;

    g_return_if_fail(POPPLER_IS_LAYER(poppler_layer));

    layer = poppler_layer->layer;

    if (layer->oc->getState() == OptionalContentGroup::Off) {

        return;

    }

    layer->oc->setState(OptionalContentGroup::Off);

}

/**

 * poppler_layer_is_parent:

 * @layer: a #PopplerLayer

 *

 * Returns whether @layer is parent of other nested layers.

 *

 * Return value: %TRUE if @layer is a parent layer

 *

 * Since: 0.12

 **/

gboolean poppler_layer_is_parent(PopplerLayer *poppler_layer)

{

    g_return_val_if_fail(POPPLER_IS_LAYER(poppler_layer), FALSE);

    return poppler_layer->layer->kids != nullptr;

}

/**

 * poppler_layer_get_radio_button_group_id:

 * @layer: a #PopplerLayer

 *

 * Returns the numeric ID the radio button group associated with @layer.

 *

 * Return value: the ID of the radio button group associated with @layer,

 * or 0 if the layer is not associated to any radio button group

 *

 * Since: 0.12

 **/

gint poppler_layer_get_radio_button_group_id(PopplerLayer *poppler_layer)

{

    g_return_val_if_fail(POPPLER_IS_LAYER(poppler_layer), FALSE);

    return GPOINTER_TO_INT(poppler_layer->rbgroup);

}