/*
 * rofi
 *
 * MIT/X11 License
 * Copyright © 2013-2023 Qball Cow <qball@gmpclient.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#ifndef ROFI_MODE_PRIVATE_H
#define ROFI_MODE_PRIVATE_H
#include "mode.h"
#include <gmodule.h>
G_BEGIN_DECLS

/**
 * Indicator what type of mode this is.
 * For now it can be the classic switcher, or also implement a completer.
 */
typedef enum {
  /** Mode type is not set */
  MODE_TYPE_UNSET = 0x0,
  /** A normal mode. */
  MODE_TYPE_SWITCHER = 0x1,
  /** A mode that can be used to completer */
  MODE_TYPE_COMPLETER = 0x2,
  /** DMenu mode. */
  MODE_TYPE_DMENU = 0x4,
} ModeType;

/**
 * @param data Pointer to #Mode object.
 *
 * Mode free function.
 */
typedef void (*_mode_free)(Mode *data);

/**
 * @param sw The #Mode pointer
 * @param selected_line The selected line
 * @param state The state to display [out]
 * @param attribute_list List of extra (pango) attribute to apply when
 * displaying. [out][null]
 * @param get_entry if it should only return the state
 *
 * Get the value for displaying.
 *
 * @return the string and state for displaying.
 */
typedef char *(*_mode_get_display_value)(const Mode *sw,
                                         unsigned int selected_line, int *state,
                                         GList **attribute_list, int get_entry);

/**
 * @param sw The #Mode pointer
 * @param selected_line The selected line
 * @param height The height of the icon
 *
 * Obtains the icon if available
 *
 * @return Get the icon
 */
typedef cairo_surface_t *(*_mode_get_icon)(const Mode *sw,
                                           unsigned int selected_line,
                                           unsigned int height);

/**
 * @param sw The #Mode pointer
 * @param selected_line The selected line
 *
 * Obtains the string to complete.
 *
 * @return Get the completion string
 */
typedef char *(*_mode_get_completion)(const Mode *sw,
                                      unsigned int selected_line);

/**
 * @param data The #Mode pointer
 * @param tokens  List of (input) tokens to match.
 * @param index   The current selected index.
 *
 * Function prototype for the matching algorithm.
 *
 * @returns 1 when it matches, 0 if not.
 */
typedef int (*_mode_token_match)(const Mode *data, rofi_int_matcher **tokens,
                                 unsigned int index);

/**
 * @param sw The #Mode pointer
 *
 * Initialize the mode.
 *
 * @returns TRUE is successful
 */
typedef int (*__mode_init)(Mode *sw);

/**
 * @param sw The #Mode pointer
 *
 * Get the number of entries.
 *
 * @returns the number of entries
 */
typedef unsigned int (*__mode_get_num_entries)(const Mode *sw);

/**
 * @param sw The #Mode pointer
 *
 * Destroy the current mode. Still ready to restart.
 *
 */
typedef void (*__mode_destroy)(Mode *sw);

/**
 * @param sw The #Mode pointer
 * @param menu_retv The return value
 * @param input The input string
 * @param selected_line The selected line
 *
 * Handle the user accepting an entry.
 *
 * @returns the next action to take
 */
typedef ModeMode (*_mode_result)(Mode *sw, int menu_retv, char **input,
                                 unsigned int selected_line);

/**
 * @param sw The #Mode pointer
 * @param input The input string
 *
 * Preprocess the input for sorting.
 *
 * @returns Entry stripped from markup for sorting
 */
typedef char *(*_mode_preprocess_input)(Mode *sw, const char *input);

/**
 * @param sw The #Mode pointer
 *
 * Message to show in the message bar.
 *
 * @returns the (valid pango markup) message to display.
 */
typedef char *(*_mode_get_message)(const Mode *sw);

/**
 * Create a new instance of this mode.
 * Free (free) result after use, after using mode_destroy.
 *
 * @returns Instantiate a new instance of this mode.
 */
typedef Mode *(*_mode_create)(void);

/**
 * @param sw The #Mode pointer
 * @param menu_retv The return value
 * @param input The input string
 * @param selected_line The selected line
 * @param path the path that was completed
 *
 * Handle the user accepting an entry in completion mode.
 *
 * @returns the next action to take
 */
typedef ModeMode (*_mode_completer_result)(Mode *sw, int menu_retv,
                                           char **input,
                                           unsigned int selected_line,
                                           char **path);
/**
 * Structure defining a switcher.
 * It consists of a name, callback and if enabled
 * a textbox for the sidebar-mode.
 */
struct rofi_mode {
  /** Used for external plugins. */
  unsigned int abi_version;
  /** Name (max 31 char long) */
  char *name;
  char cfg_name_key[128];
  char *display_name;

  /**
   * A switcher normally consists of the following parts:
   */
  /** Initialize the Mode */
  __mode_init _init;
  /** Destroy the switcher, e.g. free all its memory. */
  __mode_destroy _destroy;
  /** Get number of entries to display. (unfiltered). */
  __mode_get_num_entries _get_num_entries;
  /** Process the result of the user selection. */
  _mode_result _result;
  /** Token match. */
  _mode_token_match _token_match;
  /** Get the string to display for the entry. */
  _mode_get_display_value _get_display_value;
  /** Get the icon for the entry. */
  _mode_get_icon _get_icon;
  /** Get the 'completed' entry. */
  _mode_get_completion _get_completion;

  _mode_preprocess_input _preprocess_input;

  _mode_get_message _get_message;

  /** Pointer to private data. */
  void *private_data;

  /**
   * Free SWitcher
   * Only to be used when the switcher object itself is dynamic.
   * And has data in `ed`
   */
  _mode_free free;

  /**
   * Create mode.
   */
  _mode_create _create;

  /**
   * If this mode is used as completer.
   */
  _mode_completer_result _completer_result;

  /** Extra fields for script */
  void *ed;

  /** Module */
  GModule *module;

  /** Fallack icon.*/
  uint32_t fallback_icon_fetch_uid;
  uint32_t fallback_icon_not_found;

  /** type */
  ModeType type;
};
G_END_DECLS
#endif // ROFI_MODE_PRIVATE_H