ev-mapping-list.c

Go to the documentation of this file.

/* ev-mapping.c
 *  this file is part of evince, a gnome document viewer
 *
 * Copyright (C) 2009 Carlos Garcia Campos <carlosgc@gnome.org>
 *
 * Evince 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 of the License, or
 * (at your option) any later version.
 *
 * Evince 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 "ev-mapping-list.h"

struct _EvMappingList {
    guint          page;
    GList         *list;
    GDestroyNotify data_destroy_func;
    volatile gint  ref_count;
};

G_DEFINE_BOXED_TYPE (EvMappingList, ev_mapping_list, ev_mapping_list_ref, ev_mapping_list_unref)


EvMapping *
ev_mapping_list_find (EvMappingList *mapping_list,
              gconstpointer  data)
{
    GList *list;

    for (list = mapping_list->list; list; list = list->next) {
        EvMapping *mapping = list->data;

        if (mapping->data == data)
            return mapping;
    }

    return NULL;
}

EvMapping *
ev_mapping_list_find_custom (EvMappingList *mapping_list,
                 gconstpointer  data,
                 GCompareFunc   func)
{
    GList *list;

    for (list = mapping_list->list; list; list = list->next) {
        EvMapping *mapping = list->data;

        if (!func (mapping->data, data))
            return mapping;
    }

    return NULL;
}

EvMapping *
ev_mapping_list_nth (EvMappingList *mapping_list,
                     guint          n)
{
        g_return_val_if_fail (mapping_list != NULL, NULL);

        return (EvMapping *)g_list_nth_data (mapping_list->list, n);
}

EvMapping *
ev_mapping_list_get (EvMappingList *mapping_list,
             gdouble        x,
             gdouble        y)
{
    GList *list;

        g_return_val_if_fail (mapping_list != NULL, NULL);

    for (list = mapping_list->list; list; list = list->next) {
        EvMapping *mapping = list->data;

        if ((x >= mapping->area.x1) &&
            (y >= mapping->area.y1) &&
            (x <= mapping->area.x2) &&
            (y <= mapping->area.y2)) {
            return mapping;
        }
    }

    return NULL;
}

gpointer
ev_mapping_list_get_data (EvMappingList *mapping_list,
              gdouble        x,
              gdouble        y)
{
    EvMapping *mapping;

    mapping = ev_mapping_list_get (mapping_list, x, y);
    if (mapping)
        return mapping->data;

    return NULL;
}

GList *
ev_mapping_list_get_list (EvMappingList *mapping_list)
{
    return mapping_list ? mapping_list->list : NULL;
}

void
ev_mapping_list_remove (EvMappingList *mapping_list,
            EvMapping     *mapping)
{
    mapping_list->list = g_list_remove (mapping_list->list, mapping);
        mapping_list->data_destroy_func (mapping->data);
        g_free (mapping);
}

guint
ev_mapping_list_get_page (EvMappingList *mapping_list)
{
    return mapping_list->page;
}

guint
ev_mapping_list_length (EvMappingList *mapping_list)
{
        g_return_val_if_fail (mapping_list != NULL, 0);

        return g_list_length (mapping_list->list);
}

EvMappingList *
ev_mapping_list_new (guint          page,
             GList         *list,
             GDestroyNotify data_destroy_func)
{
    EvMappingList *mapping_list;

    g_return_val_if_fail (data_destroy_func != NULL, NULL);

    mapping_list = g_slice_new (EvMappingList);
    mapping_list->page = page;
    mapping_list->list = list;
    mapping_list->data_destroy_func = data_destroy_func;
    mapping_list->ref_count = 1;

    return mapping_list;
}

EvMappingList *
ev_mapping_list_ref (EvMappingList *mapping_list)
{
    g_return_val_if_fail (mapping_list != NULL, NULL);
    g_return_val_if_fail (mapping_list->ref_count > 0, mapping_list);

    g_atomic_int_add (&mapping_list->ref_count, 1);

    return mapping_list;
}

static void
mapping_list_free_foreach (EvMapping     *mapping,
               GDestroyNotify destroy_func)
{
    destroy_func (mapping->data);
    g_free (mapping);
}

void
ev_mapping_list_unref (EvMappingList *mapping_list)
{
    g_return_if_fail (mapping_list != NULL);
    g_return_if_fail (mapping_list->ref_count > 0);

    if (g_atomic_int_add (&mapping_list->ref_count, -1) - 1 == 0) {
        g_list_foreach (mapping_list->list,
                (GFunc)mapping_list_free_foreach,
                mapping_list->data_destroy_func);
        g_list_free (mapping_list->list);
        g_slice_free (EvMappingList, mapping_list);
    }
}