/** \file panel.h
 *  \brief Header: defines WPanel structure
 */

#ifndef MC__PANEL_H
#define MC__PANEL_H

#include <inttypes.h>  // uintmax_t
#include <limits.h>    // MB_LEN_MAX

#include "lib/global.h"  // gboolean
#include "lib/fs.h"      // MC_MAXPATHLEN
#include "lib/strutil.h"
#include "lib/widget.h"  // Widget
#include "lib/filehighlight.h"
#include "lib/file-entry.h"

#include "dir.h"  // dir_list

/*** typedefs(not structures) and defined constants **********************************************/

#define PANEL(x)     ((WPanel *) (x))

#define LIST_FORMATS 4

#define UP_KEEPSEL   ((char *) -1)

/*** enums ***************************************************************************************/

typedef enum
{
    list_full,   // Name, size, perm/date
    list_brief,  // Name
    list_long,   // Like ls -l
    list_user    // User defined
} list_format_t;

typedef enum
{
    frame_full,  // full screen frame
    frame_half   // half screen frame
} panel_display_t;

typedef enum
{
    UP_OPTIMIZE = 0,
    UP_RELOAD = 1,
    UP_ONLY_CURRENT = 2
} panel_update_flags_t;

/* run mode and params */
enum cd_enum
{
    cd_parse_command,
    cd_exact
};

/*** structures declarations (and typedefs of structures)*****************************************/

typedef struct panel_field_struct
{
    const char *id;
    int min_size;
    gboolean expands;
    align_crt_t default_just;
    const char *hotkey;
    const char *title_hotkey;
    gboolean is_user_choice;
    gboolean use_in_user_format;
    const char *(*string_fn) (const file_entry_t *fe, int len);
    GCompareFunc sort_routine;  // used by mouse_sort_col()
} panel_field_t;

typedef struct
{
    dir_list list;
    vfs_path_t *root_vpath;
} panelized_descr_t;

typedef struct
{
    Widget widget;

    char *name;  // The panel name

    panel_display_t frame_size;  // half or full frame

    gboolean active;  // If panel is currently selected
    gboolean dirty;   // Should we redisplay the panel?

    gboolean is_panelized;               // Panelization: special mode, can't reload the file list
    panelized_descr_t *panelized_descr;  // Panelization descriptor

    int codepage;  // Panel codepage

    dir_list dir;          // Directory contents
    struct stat dir_stat;  // Stat of current dir: used by execute ()

    vfs_path_t *cwd_vpath;  // Current Working Directory
    vfs_path_t *lwd_vpath;  // Last Working Directory

    list_format_t list_format;  // Listing type
    GSList *format;             // Display format
    char *user_format;          // User format
    int list_cols;              // Number of file list columns
    int brief_cols;             // Number of columns in case of list_brief format
    // sort
    dir_sort_options_t sort_info;
    const panel_field_t *sort_field;

    int marked;       // Count of marked files
    int dirs_marked;  // Count of marked directories
    uintmax_t total;  // Bytes in marked files

    int top;      // The file shown on the top of the panel
    int current;  // Index to the currently selected file

    GSList *status_format;                   // Mini status format
    gboolean user_mini_status;               // Is user_status_format used
    char *user_status_format[LIST_FORMATS];  // User format for status line

    file_filter_t filter;  // File name filter

    struct
    {
        char *name;      // Directory history name for history file
        GList *list;     // Directory history
        GList *current;  // Pointer to the current history item
    } dir_history;

    struct
    {
        gboolean active;
        GString *buffer;
        GString *prev_buffer;
        char ch[MB_LEN_MAX];  // Buffer for multi-byte character
        int chpoint;          // Point after last characters in @ch
    } quick_search;

    unsigned int content_shift;  // Number of characters of filename need to skip from left side
    unsigned int max_shift;      // Max shift for visible part of current panel
} WPanel;

/*** global variables defined in .c file *********************************************************/

extern hook_t *select_file_hook;

extern mc_fhl_t *mc_filehighlight;

/*** declarations of public functions ************************************************************/

WPanel *panel_sized_empty_new (const char *panel_name, const WRect *r);
WPanel *panel_sized_with_dir_new (const char *panel_name, const WRect *r, const vfs_path_t *vpath);

void panel_clean_dir (WPanel *panel);

void panel_reload (WPanel *panel);
void panel_set_sort_order (WPanel *panel, const panel_field_t *sort_order);
void panel_re_sort (WPanel *panel);

void panel_change_encoding (WPanel *panel);
vfs_path_t *remove_encoding_from_path (const vfs_path_t *vpath);

void update_panels (panel_update_flags_t flags, const char *current_file);
int set_panel_formats (WPanel *p);

void panel_set_filter (WPanel *panel, const file_filter_t *filter);

file_entry_t *panel_current_entry (const WPanel *panel);
void panel_set_current_by_name (WPanel *panel, const char *name);

void unmark_files (WPanel *panel);
void select_item (WPanel *panel);

void recalculate_panel_summary (WPanel *panel);
void file_mark (WPanel *panel, int idx, int val);
void do_file_mark (WPanel *panel, int idx, int val);
const GString *panel_find_marked_file (const WPanel *panel, int *current_file);
const GString *panel_get_marked_file (const WPanel *panel, int *current_file);

gboolean panel_do_cd (WPanel *panel, const vfs_path_t *new_dir_vpath, enum cd_enum cd_type);
MC_MOCKABLE gboolean panel_cd (WPanel *panel, const vfs_path_t *new_dir_vpath,
                               enum cd_enum cd_type);

gsize panel_get_num_of_sortable_fields (void);
char **panel_get_sortable_fields (gsize *array_size);
const panel_field_t *panel_get_field_by_id (const char *name);
const panel_field_t *panel_get_field_by_title (const char *name);
const panel_field_t *panel_get_field_by_title_hotkey (const char *name);
gsize panel_get_num_of_user_possible_fields (void);
char **panel_get_user_possible_fields (gsize *array_size);
void panel_set_cwd (WPanel *panel, const vfs_path_t *vpath);
void panel_set_lwd (WPanel *panel, const vfs_path_t *vpath);

void panel_panelize_cd (void);
void panel_panelize_change_root (WPanel *panel, const vfs_path_t *new_root);
void panel_panelize_absolutize_if_needed (WPanel *panel);
void panel_panelize_save (WPanel *panel);

void panel_init (void);
void panel_deinit (void);

/* --------------------------------------------------------------------------------------------- */
/*** inline functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
/**
 * Empty panel creation.
 *
 * @param panel_name name of panel for setup retrieving
 *
 * @return new instance of WPanel
 */

static inline WPanel *
panel_empty_new (const char *panel_name)
{
    // Unknown sizes of the panel at startup
    WRect r = { 0, 0, 1, 1 };

    return panel_sized_empty_new (panel_name, &r);
}

/* --------------------------------------------------------------------------------------------- */
/**
 * Panel creation for specified directory.
 *
 * @param panel_name name of panel for setup retrieving
 * @param vpath working panel directory. If NULL then current directory is used
 *
 * @return new instance of WPanel
 */

static inline WPanel *
panel_with_dir_new (const char *panel_name, const vfs_path_t *vpath)
{
    // Unknown sizes of the panel at startup
    WRect r = { 0, 0, 1, 1 };

    return panel_sized_with_dir_new (panel_name, &r, vpath);
}

/* --------------------------------------------------------------------------------------------- */
/**
 * Panel creation.
 *
 * @param panel_name name of panel for setup retrieving
 *
 * @return new instance of WPanel
 */

static inline WPanel *
panel_new (const char *panel_name)
{
    return panel_with_dir_new (panel_name, NULL);
}

/* --------------------------------------------------------------------------------------------- */
/**
 * Panel creation with specified size.
 *
 * @param panel_name name of panel for setup retrieving
 * @param r panel area
 *
 * @return new instance of WPanel
 */

static inline WPanel *
panel_sized_new (const char *panel_name, const WRect *r)
{
    return panel_sized_with_dir_new (panel_name, r, NULL);
}

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

#endif