/*
   File highlight plugin.
   Interface functions. get color pair index for highlighted file.

   Copyright (C) 2009-2024
   Free Software Foundation, Inc.

   Written by:
   Slava Zanko <slavazanko@gmail.com>, 2009.

   This file is part of the Midnight Commander.

   The Midnight Commander 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 3 of the License,
   or (at your option) any later version.

   The Midnight Commander 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, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <string.h>

#include "lib/global.h"
#include "lib/skin.h"
#include "lib/util.h"           /* is_exe() */
#include "lib/filehighlight.h"
#include "internal.h"

/*** global variables ****************************************************************************/

/*** file scope macro definitions ****************************************************************/

/*** file scope type declarations ****************************************************************/

/*** forward declarations (file scope functions) *************************************************/

/*** file scope variables ************************************************************************/

/* --------------------------------------------------------------------------------------------- */
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */

/*inline functions */
inline static gboolean
mc_fhl_is_file (const file_entry_t *fe)
{
#if HAVE_S_ISREG == 0
    (void) fe;
#endif
    return S_ISREG (fe->st.st_mode);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_file_exec (const file_entry_t *fe)
{
    return is_exe (fe->st.st_mode);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_dir (const file_entry_t *fe)
{
#if HAVE_S_ISDIR == 0
    (void) fe;
#endif
    return S_ISDIR (fe->st.st_mode);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_link (const file_entry_t *fe)
{
#if HAVE_S_ISLNK == 0
    (void) fe;
#endif
    return S_ISLNK (fe->st.st_mode);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_hlink (const file_entry_t *fe)
{
    return (fe->st.st_nlink > 1);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_link_to_dir (const file_entry_t *fe)
{
    return mc_fhl_is_link (fe) && fe->f.link_to_dir != 0;
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_stale_link (const file_entry_t *fe)
{
    return mc_fhl_is_link (fe) ? (fe->f.stale_link != 0) : !mc_fhl_is_file (fe);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_device_char (const file_entry_t *fe)
{
#if HAVE_S_ISCHR == 0
    (void) fe;
#endif
    return S_ISCHR (fe->st.st_mode);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_device_block (const file_entry_t *fe)
{
#if HAVE_S_ISBLK == 0
    (void) fe;
#endif
    return S_ISBLK (fe->st.st_mode);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_special_socket (const file_entry_t *fe)
{
#if HAVE_S_ISSOCK == 0
    (void) fe;
#endif
    return S_ISSOCK (fe->st.st_mode);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_special_fifo (const file_entry_t *fe)
{
#if HAVE_S_ISFIFO == 0
    (void) fe;
#endif
    return S_ISFIFO (fe->st.st_mode);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_special_door (const file_entry_t *fe)
{
#if HAVE_S_ISDOOR == 0
    (void) fe;
#endif
    return S_ISDOOR (fe->st.st_mode);
}

/* --------------------------------------------------------------------------------------------- */

inline static gboolean
mc_fhl_is_special (const file_entry_t *fe)
{
    return
        (mc_fhl_is_special_socket (fe) || mc_fhl_is_special_fifo (fe)
         || mc_fhl_is_special_door (fe));
}

/* --------------------------------------------------------------------------------------------- */

static int
mc_fhl_get_color_filetype (const mc_fhl_filter_t *mc_filter, const mc_fhl_t *fhl,
                           const file_entry_t *fe)
{
    gboolean my_color = FALSE;

    (void) fhl;

    switch (mc_filter->file_type)
    {
    case MC_FLHGH_FTYPE_T_FILE:
        if (mc_fhl_is_file (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_FILE_EXE:
        if (mc_fhl_is_file (fe) && mc_fhl_is_file_exec (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_DIR:
        if (mc_fhl_is_dir (fe) || mc_fhl_is_link_to_dir (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_LINK_DIR:
        if (mc_fhl_is_link_to_dir (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_LINK:
        if (mc_fhl_is_link (fe) || mc_fhl_is_hlink (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_HARDLINK:
        if (mc_fhl_is_hlink (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_SYMLINK:
        if (mc_fhl_is_link (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_STALE_LINK:
        if (mc_fhl_is_stale_link (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_DEVICE:
        if (mc_fhl_is_device_char (fe) || mc_fhl_is_device_block (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_DEVICE_BLOCK:
        if (mc_fhl_is_device_block (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_DEVICE_CHAR:
        if (mc_fhl_is_device_char (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_SPECIAL:
        if (mc_fhl_is_special (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_SPECIAL_SOCKET:
        if (mc_fhl_is_special_socket (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_SPECIAL_FIFO:
        if (mc_fhl_is_special_fifo (fe))
            my_color = TRUE;
        break;
    case MC_FLHGH_FTYPE_T_SPECIAL_DOOR:
        if (mc_fhl_is_special_door (fe))
            my_color = TRUE;
        break;
    default:
        break;
    }

    return my_color ? mc_filter->color_pair_index : -1;
}

/* --------------------------------------------------------------------------------------------- */

static int
mc_fhl_get_color_regexp (const mc_fhl_filter_t *mc_filter, const mc_fhl_t *fhl,
                         const file_entry_t *fe)
{
    (void) fhl;

    if (mc_filter->search_condition == NULL)
        return -1;

    if (mc_search_run (mc_filter->search_condition, fe->fname->str, 0, fe->fname->len, NULL))
        return mc_filter->color_pair_index;

    return -1;
}

/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */

int
mc_fhl_get_color (const mc_fhl_t *fhl, const file_entry_t *fe)
{
    guint i;
    int ret;

    if (fhl == NULL)
        return NORMAL_COLOR;

    for (i = 0; i < fhl->filters->len; i++)
    {
        mc_fhl_filter_t *mc_filter;

        mc_filter = (mc_fhl_filter_t *) g_ptr_array_index (fhl->filters, i);
        switch (mc_filter->type)
        {
        case MC_FLHGH_T_FTYPE:
            ret = mc_fhl_get_color_filetype (mc_filter, fhl, fe);
            if (ret > 0)
                return -ret;
            break;
        case MC_FLHGH_T_EXT:
        case MC_FLHGH_T_FREGEXP:
            ret = mc_fhl_get_color_regexp (mc_filter, fhl, fe);
            if (ret > 0)
                return -ret;
            break;
        default:
            break;
        }
    }
    return NORMAL_COLOR;
}

/* --------------------------------------------------------------------------------------------- */