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/*
 * nautilus-debug: debug loggers for nautilus
 *
 * Copyright (C) 2007 Collabora Ltd.
 * Copyright (C) 2007 Nokia Corporation
 * Copyright (C) 2010 Red Hat, Inc.
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, see <http://www.gnu.org/licenses/>.
 *
 * Based on Empathy's empathy-debug.
 */

#include "config.h"

#include <stdarg.h>
#include <glib.h>

#include "nautilus-debug.h"

#include "nautilus-file.h"

static DebugFlags flags = 0;
static gboolean initialized = FALSE;

static GDebugKey keys[] =
{
    { "Application", NAUTILUS_DEBUG_APPLICATION },
    { "AsyncJobs", NAUTILUS_DEBUG_ASYNC_JOBS },
    { "Bookmarks", NAUTILUS_DEBUG_BOOKMARKS },
    { "DBus", NAUTILUS_DEBUG_DBUS },
    { "DirectoryView", NAUTILUS_DEBUG_DIRECTORY_VIEW },
    { "File", NAUTILUS_DEBUG_FILE },
    { "IconView", NAUTILUS_DEBUG_GRID_VIEW },
    { "ListView", NAUTILUS_DEBUG_LIST_VIEW },
    { "Mime", NAUTILUS_DEBUG_MIME },
    { "Places", NAUTILUS_DEBUG_PLACES },
    { "Previewer", NAUTILUS_DEBUG_PREVIEWER },
    { "Search", NAUTILUS_DEBUG_SEARCH },
    { "SearchHit", NAUTILUS_DEBUG_SEARCH_HIT },
    { "Smclient", NAUTILUS_DEBUG_SMCLIENT },
    { "Window", NAUTILUS_DEBUG_WINDOW },
    { "Undo", NAUTILUS_DEBUG_UNDO },
    { "Thumbnails", NAUTILUS_DEBUG_THUMBNAILS },
    { "TagManager", NAUTILUS_DEBUG_TAG_MANAGER },
    { 0, }
};

static void
nautilus_debug_set_flags_from_env (void)
{
    guint nkeys;
    const gchar *flags_string;

    for (nkeys = 0; keys[nkeys].value; nkeys++)
    {
    }

    flags_string = g_getenv ("NAUTILUS_DEBUG");

    if (flags_string)
    {
        nautilus_debug_set_flags (g_parse_debug_string (flags_string, keys, nkeys));
    }

    initialized = TRUE;
}

void
nautilus_debug_set_flags (DebugFlags new_flags)
{
    flags |= new_flags;
    initialized = TRUE;
}

gboolean
nautilus_debug_flag_is_set (DebugFlags flag)
{
    return flag & flags;
}

void
nautilus_debug (DebugFlags   flag,
                const gchar *format,
                ...)
{
    va_list args;
    va_start (args, format);
    nautilus_debug_valist (flag, format, args);
    va_end (args);
}

__attribute__((__format__ (__printf__, 2, 0)))
void
nautilus_debug_valist (DebugFlags   flag,
                       const gchar *format,
                       va_list      args)
{
    if (G_UNLIKELY (!initialized))
    {
        nautilus_debug_set_flags_from_env ();
    }

    if (flag & flags)
    {
        g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format, args);
    }
}

__attribute__((__format__ (__printf__, 3, 0)))
static void
nautilus_debug_files_valist (DebugFlags   flag,
                             GList       *files,
                             const gchar *format,
                             va_list      args)
{
    NautilusFile *file;
    GList *l;
    gchar *uri, *msg;

    if (G_UNLIKELY (!initialized))
    {
        nautilus_debug_set_flags_from_env ();
    }

    if (!(flag & flags))
    {
        return;
    }

    msg = g_strdup_vprintf (format, args);

    g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "%s:", msg);

    for (l = files; l != NULL; l = l->next)
    {
        file = l->data;
        uri = nautilus_file_get_uri (file);

        if (nautilus_file_is_gone (file))
        {
            gchar *new_uri;

            /* Hack: this will create an invalid URI, but it's for
             * display purposes only.
             */
            new_uri = g_strconcat (uri ? uri : "", " (gone)", NULL);
            g_free (uri);
            uri = new_uri;
        }

        g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "   %s", uri);
        g_free (uri);
    }

    g_free (msg);
}

void
nautilus_debug_files (DebugFlags   flag,
                      GList       *files,
                      const gchar *format,
                      ...)
{
    va_list args;

    va_start (args, format);
    nautilus_debug_files_valist (flag, files, format, args);
    va_end (args);
}