/*
 * rofi
 *
 * MIT/X11 License
 * Copyright © 2013-2022 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.
 *
 */

/** The log domain of this dialog. */
#define G_LOG_DOMAIN "Dialogs.DMenu"

#include "dialogs/dmenu.h"
#include "helper.h"
#include "rofi-icon-fetcher.h"
#include "rofi.h"
#include "settings.h"
#include "view.h"
#include "widgets/textbox.h"
#include "xrmoptions.h"
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <gio/gio.h>
#include <gio/gunixinputstream.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include "dialogs/dmenuscriptshared.h"

static int dmenu_mode_init(Mode *sw);
static int dmenu_token_match(const Mode *sw, rofi_int_matcher **tokens,
                             unsigned int index);
static cairo_surface_t *dmenu_get_icon(const Mode *sw,
                                       unsigned int selected_line, int height);
static char *dmenu_get_message(const Mode *sw);

static inline unsigned int bitget(uint32_t *array, unsigned int index) {
  uint32_t bit = index % 32;
  uint32_t val = array[index / 32];
  return (val >> bit) & 1;
}

static inline void bittoggle(uint32_t *array, unsigned int index) {
  uint32_t bit = index % 32;
  uint32_t *v = &array[index / 32];
  *v ^= 1 << bit;
}

typedef struct {
  /** Settings */
  // Separator.
  char separator;

  unsigned int selected_line;
  char *message;
  char *format;
  struct rofi_range_pair *urgent_list;
  unsigned int num_urgent_list;
  struct rofi_range_pair *active_list;
  unsigned int num_active_list;
  uint32_t *selected_list;
  unsigned int num_selected_list;
  unsigned int do_markup;
  // List with entries.
  DmenuScriptEntry *cmd_list;
  unsigned int cmd_list_real_length;
  unsigned int cmd_list_length;
  unsigned int only_selected;
  unsigned int selected_count;

  gchar **columns;
  gchar *column_separator;
  gboolean multi_select;

  GCancellable *cancel;
  gulong cancel_source;
  GInputStream *input_stream;
  GDataInputStream *data_input_stream;
} DmenuModePrivateData;

static void async_close_callback(GObject *source_object, GAsyncResult *res,
                                 G_GNUC_UNUSED gpointer user_data) {
  g_input_stream_close_finish(G_INPUT_STREAM(source_object), res, NULL);
  g_debug("Closing data stream.");
}

static void read_add(DmenuModePrivateData *pd, char *data, gsize len) {
  gsize data_len = len;
  if ((pd->cmd_list_length + 2) > pd->cmd_list_real_length) {
    pd->cmd_list_real_length = MAX(pd->cmd_list_real_length * 2, 512);
    pd->cmd_list = g_realloc(pd->cmd_list, (pd->cmd_list_real_length) *
                                               sizeof(DmenuScriptEntry));
  }
  // Init.
  pd->cmd_list[pd->cmd_list_length].icon_fetch_uid = 0;
  pd->cmd_list[pd->cmd_list_length].icon_name = NULL;
  pd->cmd_list[pd->cmd_list_length].meta = NULL;
  pd->cmd_list[pd->cmd_list_length].info = NULL;
  pd->cmd_list[pd->cmd_list_length].nonselectable = FALSE;
  char *end = data;
  while (end < data + len && *end != '\0') {
    end++;
  }
  if (end != data + len) {
    data_len = end - data;
    dmenuscript_parse_entry_extras(NULL, &(pd->cmd_list[pd->cmd_list_length]),
                                   end + 1, len - data_len);
  }
  char *utfstr = rofi_force_utf8(data, data_len);
  pd->cmd_list[pd->cmd_list_length].entry = utfstr;
  pd->cmd_list[pd->cmd_list_length + 1].entry = NULL;

  pd->cmd_list_length++;
}
static void async_read_callback(GObject *source_object, GAsyncResult *res,
                                gpointer user_data) {
  GDataInputStream *stream = (GDataInputStream *)source_object;
  DmenuModePrivateData *pd = (DmenuModePrivateData *)user_data;
  gsize len;
  char *data = g_data_input_stream_read_upto_finish(stream, res, &len, NULL);
  if (data != NULL) {
    // Absorb separator, already in buffer so should not block.
    g_data_input_stream_read_byte(stream, NULL, NULL);
    read_add(pd, data, len);
    g_free(data);
    rofi_view_reload();

    g_data_input_stream_read_upto_async(pd->data_input_stream, &(pd->separator),
                                        1, G_PRIORITY_LOW, pd->cancel,
                                        async_read_callback, pd);
    return;
  } else {
    GError *error = NULL;
    // Absorb separator, already in buffer so should not block.
    // If error == NULL end of stream..
    g_data_input_stream_read_byte(stream, NULL, &error);
    if (error == NULL) {
      // Add empty line.
      read_add(pd, "", 0);
      rofi_view_reload();

      g_data_input_stream_read_upto_async(pd->data_input_stream,
                                          &(pd->separator), 1, G_PRIORITY_LOW,
                                          pd->cancel, async_read_callback, pd);
      return;
    }
    g_error_free(error);
  }
  if (!g_cancellable_is_cancelled(pd->cancel)) {
    // Hack, don't use get active.
    g_debug("Clearing overlay");
    rofi_view_set_overlay(rofi_view_get_active(), NULL);
    g_input_stream_close_async(G_INPUT_STREAM(stream), G_PRIORITY_LOW,
                               pd->cancel, async_close_callback, pd);
  }
}

static void async_read_cancel(G_GNUC_UNUSED GCancellable *cancel,
                              G_GNUC_UNUSED gpointer data) {
  g_debug("Cancelled the async read.");
}

static int get_dmenu_async(DmenuModePrivateData *pd, int sync_pre_read) {
  while (sync_pre_read--) {
    gsize len = 0;
    char *data = g_data_input_stream_read_upto(
        pd->data_input_stream, &(pd->separator), 1, &len, NULL, NULL);
    if (data == NULL) {
      g_input_stream_close_async(G_INPUT_STREAM(pd->input_stream),
                                 G_PRIORITY_LOW, pd->cancel,
                                 async_close_callback, pd);
      return FALSE;
    }
    g_data_input_stream_read_byte(pd->data_input_stream, NULL, NULL);
    read_add(pd, data, len);
    g_free(data);
  }
  g_data_input_stream_read_upto_async(pd->data_input_stream, &(pd->separator),
                                      1, G_PRIORITY_LOW, pd->cancel,
                                      async_read_callback, pd);
  return TRUE;
}
static void get_dmenu_sync(DmenuModePrivateData *pd) {
  while (TRUE) {
    gsize len = 0;
    char *data = g_data_input_stream_read_upto(
        pd->data_input_stream, &(pd->separator), 1, &len, NULL, NULL);
    if (data == NULL) {
      break;
    }
    g_data_input_stream_read_byte(pd->data_input_stream, NULL, NULL);
    read_add(pd, data, len);
    g_free(data);
  }
  g_input_stream_close_async(G_INPUT_STREAM(pd->input_stream), G_PRIORITY_LOW,
                             pd->cancel, async_close_callback, pd);
}

static unsigned int dmenu_mode_get_num_entries(const Mode *sw) {
  const DmenuModePrivateData *rmpd =
      (const DmenuModePrivateData *)mode_get_private_data(sw);
  return rmpd->cmd_list_length;
}

static gchar *dmenu_format_output_string(const DmenuModePrivateData *pd,
                                         const char *input) {
  if (pd->columns == NULL) {
    return g_strdup(input);
  }
  char *retv = NULL;
  char **splitted =
      g_regex_split_simple(pd->column_separator, input, G_REGEX_CASELESS, 00);
  uint32_t ns = 0;
  for (; splitted && splitted[ns]; ns++) {
    ;
  }
  GString *str_retv = g_string_new("");
  for (uint32_t i = 0; pd->columns && pd->columns[i]; i++) {
    unsigned int index =
        (unsigned int)g_ascii_strtoull(pd->columns[i], NULL, 10);
    if (index <= ns && index > 0) {
      if (index == 1) {
        g_string_append(str_retv, splitted[index - 1]);
      } else {
        g_string_append_c(str_retv, '\t');
        g_string_append(str_retv, splitted[index - 1]);
      }
    }
  }
  g_strfreev(splitted);
  retv = str_retv->str;
  g_string_free(str_retv, FALSE);
  return retv;
}

static inline unsigned int get_index(unsigned int length, int index) {
  if (index >= 0) {
    return index;
  }
  if (((unsigned int)-index) <= length) {
    return length + index;
  }
  // Out of range.
  return UINT_MAX;
}

static char *get_display_data(const Mode *data, unsigned int index, int *state,
                              G_GNUC_UNUSED GList **list, int get_entry) {
  Mode *sw = (Mode *)data;
  DmenuModePrivateData *pd = (DmenuModePrivateData *)mode_get_private_data(sw);
  DmenuScriptEntry *retv = (DmenuScriptEntry *)pd->cmd_list;
  for (unsigned int i = 0; i < pd->num_active_list; i++) {
    unsigned int start =
        get_index(pd->cmd_list_length, pd->active_list[i].start);
    unsigned int stop = get_index(pd->cmd_list_length, pd->active_list[i].stop);
    if (index >= start && index <= stop) {
      *state |= ACTIVE;
    }
  }
  for (unsigned int i = 0; i < pd->num_urgent_list; i++) {
    unsigned int start =
        get_index(pd->cmd_list_length, pd->urgent_list[i].start);
    unsigned int stop = get_index(pd->cmd_list_length, pd->urgent_list[i].stop);
    if (index >= start && index <= stop) {
      *state |= URGENT;
    }
  }
  if (pd->selected_list && bitget(pd->selected_list, index) == TRUE) {
    *state |= SELECTED;
  }
  if (pd->do_markup) {
    *state |= MARKUP;
  }
  return get_entry ? dmenu_format_output_string(pd, retv[index].entry) : NULL;
}

static void dmenu_mode_free(Mode *sw) {
  if (mode_get_private_data(sw) == NULL) {
    return;
  }
  DmenuModePrivateData *pd = (DmenuModePrivateData *)mode_get_private_data(sw);
  if (pd != NULL) {
    if (pd->cancel) {
      // If open, cancel reads.
      if (pd->input_stream && !g_input_stream_is_closed(pd->input_stream)) {
        g_cancellable_cancel(pd->cancel);
      }
      // This blocks until cancel is done.
      g_cancellable_disconnect(pd->cancel, pd->cancel_source);
      if (pd->input_stream) {
        // Should close the stream if not yet done.
        g_object_unref(pd->data_input_stream);
        g_object_unref(pd->input_stream);
      }
      g_object_unref(pd->cancel);
    }

    for (size_t i = 0; i < pd->cmd_list_length; i++) {
      if (pd->cmd_list[i].entry) {
        g_free(pd->cmd_list[i].entry);
        g_free(pd->cmd_list[i].icon_name);
        g_free(pd->cmd_list[i].meta);
        g_free(pd->cmd_list[i].info);
      }
    }
    g_free(pd->cmd_list);
    g_free(pd->urgent_list);
    g_free(pd->active_list);
    g_free(pd->selected_list);

    g_free(pd);
    mode_set_private_data(sw, NULL);
  }
}

#include "mode-private.h"
/** dmenu Mode object. */
Mode dmenu_mode = {.name = "dmenu",
                   .cfg_name_key = "display-combi",
                   ._init = dmenu_mode_init,
                   ._get_num_entries = dmenu_mode_get_num_entries,
                   ._result = NULL,
                   ._destroy = dmenu_mode_free,
                   ._token_match = dmenu_token_match,
                   ._get_display_value = get_display_data,
                   ._get_icon = dmenu_get_icon,
                   ._get_completion = NULL,
                   ._preprocess_input = NULL,
                   ._get_message = dmenu_get_message,
                   .private_data = NULL,
                   .free = NULL,
                   .display_name = "dmenu"};

static int dmenu_mode_init(Mode *sw) {
  if (mode_get_private_data(sw) != NULL) {
    return TRUE;
  }
  mode_set_private_data(sw, g_malloc0(sizeof(DmenuModePrivateData)));
  DmenuModePrivateData *pd = (DmenuModePrivateData *)mode_get_private_data(sw);

  pd->separator = '\n';
  pd->selected_line = UINT32_MAX;

  find_arg_str("-mesg", &(pd->message));

  // Input data separator.
  find_arg_char("-sep", &(pd->separator));

  find_arg_uint("-selected-row", &(pd->selected_line));
  // By default we print the unescaped line back.
  pd->format = "s";

  // Allow user to override the output format.
  find_arg_str("-format", &(pd->format));
  // Urgent.
  char *str = NULL;
  find_arg_str("-u", &str);
  if (str != NULL) {
    parse_ranges(str, &(pd->urgent_list), &(pd->num_urgent_list));
  }
  // Active
  str = NULL;
  find_arg_str("-a", &str);
  if (str != NULL) {
    parse_ranges(str, &(pd->active_list), &(pd->num_active_list));
  }

  // DMENU COMPATIBILITY
  unsigned int lines = DEFAULT_MENU_LINES;
  find_arg_uint("-l", &(lines));
  if (lines != DEFAULT_MENU_LINES) {
    Property *p = rofi_theme_property_create(P_INTEGER);
    p->name = g_strdup("lines");
    p->value.i = lines;
    ThemeWidget *widget =
        rofi_theme_find_or_create_name(rofi_theme, "listview");
    GHashTable *table =
        g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
                              (GDestroyNotify)rofi_theme_property_free);

    g_hash_table_replace(table, p->name, p);
    rofi_theme_widget_add_properties(widget, table);
    g_hash_table_destroy(table);
  }

  str = NULL;
  find_arg_str("-window-title", &str);
  if (str) {
    dmenu_mode.display_name = str;
  }

  /**
   * Dmenu compatibility.
   * `-b` put on bottom.
   */
  if (find_arg("-b") >= 0) {
    config.location = 6;
  }
  /* -i case insensitive */
  config.case_sensitive = TRUE;
  if (find_arg("-i") >= 0) {
    config.case_sensitive = FALSE;
  }
  int fd = STDIN_FILENO;
  str = NULL;
  if (find_arg_str("-input", &str)) {
    char *estr = rofi_expand_path(str);
    fd = open(str, O_RDONLY);
    if (fd < 0) {
      char *msg = g_markup_printf_escaped(
          "Failed to open file: <b>%s</b>:\n\t<i>%s</i>", estr,
          g_strerror(errno));
      rofi_view_error_dialog(msg, TRUE);
      g_free(msg);
      g_free(estr);
      return TRUE;
    }
    g_free(estr);
  }
  // If input is stdin, and a tty, do not read as rofi grabs input and therefore
  // blocks.
  if (!(fd == STDIN_FILENO && isatty(fd) == 1)) {
    pd->cancel = g_cancellable_new();
    pd->cancel_source = g_cancellable_connect(
        pd->cancel, G_CALLBACK(async_read_cancel), pd, NULL);
    pd->input_stream = g_unix_input_stream_new(fd, fd != STDIN_FILENO);
    pd->data_input_stream = g_data_input_stream_new(pd->input_stream);
  }
  gchar *columns = NULL;
  if (find_arg_str("-display-columns", &columns)) {
    pd->columns = g_strsplit(columns, ",", 0);
    pd->column_separator = "\t";
    find_arg_str("-display-column-separator", &pd->column_separator);
  }
  return TRUE;
}

static int dmenu_token_match(const Mode *sw, rofi_int_matcher **tokens,
                             unsigned int index) {
  DmenuModePrivateData *rmpd =
      (DmenuModePrivateData *)mode_get_private_data(sw);
  /** Strip out the markup when matching. */
  char *esc = NULL;
  if (rmpd->do_markup) {
    pango_parse_markup(rmpd->cmd_list[index].entry, -1, 0, NULL, &esc, NULL,
                       NULL);
  } else {
    esc = rmpd->cmd_list[index].entry;
  }
  if (esc) {
    //        int retv = helper_token_match ( tokens, esc );
    int match = 1;
    if (tokens) {
      for (int j = 0; match && tokens != NULL && tokens[j] != NULL; j++) {
        rofi_int_matcher *ftokens[2] = {tokens[j], NULL};
        int test = 0;
        test = helper_token_match(ftokens, esc);
        if (test == tokens[j]->invert && rmpd->cmd_list[index].meta) {
          test = helper_token_match(ftokens, rmpd->cmd_list[index].meta);
        }

        if (test == 0) {
          match = 0;
        }
      }
    }
    if (rmpd->do_markup) {
      g_free(esc);
    }
    return match;
  }
  return FALSE;
}
static char *dmenu_get_message(const Mode *sw) {
  DmenuModePrivateData *pd = (DmenuModePrivateData *)mode_get_private_data(sw);
  if (pd->message) {
    return g_strdup(pd->message);
  }
  return NULL;
}
static cairo_surface_t *dmenu_get_icon(const Mode *sw,
                                       unsigned int selected_line, int height) {
  DmenuModePrivateData *pd = (DmenuModePrivateData *)mode_get_private_data(sw);
  g_return_val_if_fail(pd->cmd_list != NULL, NULL);
  DmenuScriptEntry *dr = &(pd->cmd_list[selected_line]);
  if (dr->icon_name == NULL) {
    return NULL;
  }
  if (dr->icon_fetch_uid > 0) {
    return rofi_icon_fetcher_get(dr->icon_fetch_uid);
  }
  dr->icon_fetch_uid = rofi_icon_fetcher_query(dr->icon_name, height);
  return rofi_icon_fetcher_get(dr->icon_fetch_uid);
}

static void dmenu_finish(RofiViewState *state, int retv) {
  if (retv == FALSE) {
    rofi_set_return_code(EXIT_FAILURE);
  } else if (retv >= 10) {
    rofi_set_return_code(retv);
  } else {
    rofi_set_return_code(EXIT_SUCCESS);
  }
  rofi_view_set_active(NULL);
  rofi_view_free(state);
  mode_destroy(&dmenu_mode);
}

static void dmenu_print_results(DmenuModePrivateData *pd, const char *input) {
  DmenuScriptEntry *cmd_list = pd->cmd_list;
  int seen = FALSE;
  if (pd->selected_list != NULL) {
    for (unsigned int st = 0; st < pd->cmd_list_length; st++) {
      if (bitget(pd->selected_list, st)) {
        seen = TRUE;
        rofi_output_formatted_line(pd->format, cmd_list[st].entry, st, input);
      }
    }
  }
  if (!seen) {
    const char *cmd = input;
    if (pd->selected_line != UINT32_MAX) {
      cmd = cmd_list[pd->selected_line].entry;
    }
    if (cmd) {
      rofi_output_formatted_line(pd->format, cmd, pd->selected_line, input);
    }
  }
}

static void dmenu_finalize(RofiViewState *state) {
  int retv = FALSE;
  DmenuModePrivateData *pd =
      (DmenuModePrivateData *)rofi_view_get_mode(state)->private_data;
  unsigned int cmd_list_length = pd->cmd_list_length;
  DmenuScriptEntry *cmd_list = pd->cmd_list;

  char *input = g_strdup(rofi_view_get_user_input(state));
  pd->selected_line = rofi_view_get_selected_line(state);
  ;
  MenuReturn mretv = rofi_view_get_return_value(state);
  unsigned int next_pos = rofi_view_get_next_position(state);
  int restart = 0;
  // Special behavior.
  if (pd->only_selected) {
    /**
     * Select item mode.
     */
    restart = 1;
    // Skip if no valid item is selected.
    if ((mretv & MENU_CANCEL) == MENU_CANCEL) {
      // In no custom mode we allow canceling.
      restart = (find_arg("-only-match") >= 0);
    } else if (pd->selected_line != UINT32_MAX) {
      if ((mretv & MENU_CUSTOM_ACTION) && pd->multi_select) {
        restart = TRUE;
        if (pd->selected_list == NULL) {
          pd->selected_list =
              g_malloc0(sizeof(uint32_t) * (pd->cmd_list_length / 32 + 1));
        }
        pd->selected_count +=
            (bitget(pd->selected_list, pd->selected_line) ? (-1) : (1));
        bittoggle(pd->selected_list, pd->selected_line);
        // Move to next line.
        pd->selected_line = MIN(next_pos, cmd_list_length - 1);
        if (pd->selected_count > 0) {
          char *str =
              g_strdup_printf("%u/%u", pd->selected_count, pd->cmd_list_length);
          rofi_view_set_overlay(state, str);
          g_free(str);
        } else {
          rofi_view_set_overlay(state, NULL);
        }
      } else if ((mretv & (MENU_OK | MENU_CUSTOM_COMMAND)) &&
                 cmd_list[pd->selected_line].entry != NULL) {
        if (cmd_list[pd->selected_line].nonselectable == TRUE) {
          g_free(input);
          return;
        }
        dmenu_print_results(pd, input);
        retv = TRUE;
        if ((mretv & MENU_CUSTOM_COMMAND)) {
          retv = 10 + (mretv & MENU_LOWER_MASK);
        }
        g_free(input);
        dmenu_finish(state, retv);
        return;
      } else {
        pd->selected_line = next_pos - 1;
      }
    }
    // Restart
    rofi_view_restart(state);
    rofi_view_set_selected_line(state, pd->selected_line);
    if (!restart) {
      dmenu_finish(state, retv);
    }
    return;
  }
  // We normally do not want to restart the loop.
  restart = FALSE;
  // Normal mode
  if ((mretv & MENU_OK) && pd->selected_line != UINT32_MAX &&
      cmd_list[pd->selected_line].entry != NULL) {
    // Check if entry is non-selectable.
    if (cmd_list[pd->selected_line].nonselectable == TRUE) {
      g_free(input);
      return;
    }
    if ((mretv & MENU_CUSTOM_ACTION) && pd->multi_select) {
      restart = TRUE;
      if (pd->selected_list == NULL) {
        pd->selected_list =
            g_malloc0(sizeof(uint32_t) * (pd->cmd_list_length / 32 + 1));
      }
      pd->selected_count +=
          (bitget(pd->selected_list, pd->selected_line) ? (-1) : (1));
      bittoggle(pd->selected_list, pd->selected_line);
      // Move to next line.
      pd->selected_line = MIN(next_pos, cmd_list_length - 1);
      if (pd->selected_count > 0) {
        char *str =
            g_strdup_printf("%u/%u", pd->selected_count, pd->cmd_list_length);
        rofi_view_set_overlay(state, str);
        g_free(str);
      } else {
        rofi_view_set_overlay(state, NULL);
      }
    } else {
      dmenu_print_results(pd, input);
    }
    retv = TRUE;
  }
  // Custom input
  else if ((mretv & (MENU_CUSTOM_INPUT))) {
    dmenu_print_results(pd, input);

    retv = TRUE;
  }
  // Quick switch with entry selected.
  else if ((mretv & MENU_CUSTOM_COMMAND)) {
    dmenu_print_results(pd, input);

    restart = FALSE;
    retv = 10 + (mretv & MENU_LOWER_MASK);
  }
  g_free(input);
  if (restart) {
    rofi_view_restart(state);
    rofi_view_set_selected_line(state, pd->selected_line);
  } else {
    dmenu_finish(state, retv);
  }
}

int dmenu_mode_dialog(void) {
  mode_init(&dmenu_mode);
  MenuFlags menu_flags = MENU_NORMAL;
  DmenuModePrivateData *pd = (DmenuModePrivateData *)dmenu_mode.private_data;
  int async = TRUE;

  // For now these only work in sync mode.
  if (find_arg("-sync") >= 0 || find_arg("-dump") >= 0 ||
      find_arg("-select") >= 0 || find_arg("-no-custom") >= 0 ||
      find_arg("-only-match") >= 0 || config.auto_select ||
      find_arg("-selected-row") >= 0) {
    async = FALSE;
  }

  // Check if the subsystem is setup for reading, otherwise do not read.
  if (pd->cancel != NULL) {
    if (async) {
      unsigned int pre_read = 25;
      find_arg_uint("-async-pre-read", &pre_read);
      async = get_dmenu_async(pd, pre_read);
    } else {
      get_dmenu_sync(pd);
    }
  }
  char *input = NULL;
  unsigned int cmd_list_length = pd->cmd_list_length;
  DmenuScriptEntry *cmd_list = pd->cmd_list;

  pd->only_selected = FALSE;
  pd->multi_select = FALSE;
  if (find_arg("-multi-select") >= 0) {
    menu_flags = MENU_INDICATOR;
    pd->multi_select = TRUE;
  }
  if (find_arg("-markup-rows") >= 0) {
    pd->do_markup = TRUE;
  }
  if (find_arg("-only-match") >= 0 || find_arg("-no-custom") >= 0) {
    pd->only_selected = TRUE;
    if (cmd_list_length == 0) {
      return TRUE;
    }
  }
  if (config.auto_select && cmd_list_length == 1) {
    rofi_output_formatted_line(pd->format, cmd_list[0].entry, 0, config.filter);
    return TRUE;
  }
  if (find_arg("-password") >= 0) {
    menu_flags |= MENU_PASSWORD;
  }
  /* copy filter string */
  input = g_strdup(config.filter);

  char *select = NULL;
  find_arg_str("-select", &select);
  if (select != NULL) {
    rofi_int_matcher **tokens = helper_tokenize(select, config.case_sensitive);
    unsigned int i = 0;
    for (i = 0; i < cmd_list_length; i++) {
      if (helper_token_match(tokens, cmd_list[i].entry)) {
        pd->selected_line = i;
        break;
      }
    }
    helper_tokenize_free(tokens);
  }
  if (find_arg("-dump") >= 0) {
    rofi_int_matcher **tokens = helper_tokenize(
        config.filter ? config.filter : "", config.case_sensitive);
    unsigned int i = 0;
    for (i = 0; i < cmd_list_length; i++) {
      if (tokens == NULL || helper_token_match(tokens, cmd_list[i].entry)) {
        rofi_output_formatted_line(pd->format, cmd_list[i].entry, i,
                                   config.filter);
      }
    }
    helper_tokenize_free(tokens);
    dmenu_mode_free(&dmenu_mode);
    g_free(input);
    return TRUE;
  }
  find_arg_str("-p", &(dmenu_mode.display_name));
  RofiViewState *state =
      rofi_view_create(&dmenu_mode, input, menu_flags, dmenu_finalize);

  if (find_arg("-keep-right") >= 0) {
    rofi_view_ellipsize_start(state);
  }
  // @TODO we should do this better.
  if (async && (pd->cancel != NULL)) {
    rofi_view_set_overlay(state, "Loading.. ");
  }
  rofi_view_set_selected_line(state, pd->selected_line);
  rofi_view_set_active(state);

  return FALSE;
}

void print_dmenu_options(void) {
  int is_term = isatty(fileno(stdout));
  print_help_msg(
      "-mesg", "[string]",
      "Print a small user message under the prompt (uses pango markup)", NULL,
      is_term);
  print_help_msg("-p", "[string]", "Prompt to display left of entry field",
                 NULL, is_term);
  print_help_msg("-selected-row", "[integer]", "Select row", NULL, is_term);
  print_help_msg("-format", "[string]", "Output format string", "s", is_term);
  print_help_msg("-u", "[list]", "List of row indexes to mark urgent", NULL,
                 is_term);
  print_help_msg("-a", "[list]", "List of row indexes to mark active", NULL,
                 is_term);
  print_help_msg("-l", "[integer] ", "Number of rows to display", NULL,
                 is_term);
  print_help_msg("-window-title", "[string] ", "Set the dmenu window title",
                 NULL, is_term);
  print_help_msg("-i", "", "Set filter to be case insensitive", NULL, is_term);
  print_help_msg("-only-match", "",
                 "Force selection to be given entry, disallow no match", NULL,
                 is_term);
  print_help_msg("-no-custom", "", "Don't accept custom entry, allow no match",
                 NULL, is_term);
  print_help_msg("-select", "[string]", "Select the first row that matches",
                 NULL, is_term);
  print_help_msg("-password", "",
                 "Do not show what the user inputs. Show '*' instead.", NULL,
                 is_term);
  print_help_msg("-markup-rows", "",
                 "Allow and render pango markup as input data.", NULL, is_term);
  print_help_msg("-sep", "[char]", "Element separator.", "'\\n'", is_term);
  print_help_msg("-input", "[filename]",
                 "Read input from file instead from standard input.", NULL,
                 is_term);
  print_help_msg("-sync", "",
                 "Force dmenu to first read all input data, then show dialog.",
                 NULL, is_term);
  print_help_msg("-async-pre-read", "[number]",
                 "Read several entries blocking before switching to async mode",
                 "25", is_term);
  print_help_msg("-w", "windowid", "Position over window with X11 windowid.",
                 NULL, is_term);
  print_help_msg("-keep-right", "", "Set ellipsize to end.", NULL, is_term);
  print_help_msg("--display-columns", "", "Only show the selected columns",
                 NULL, is_term);
  print_help_msg("--display-column-separator", "\t",
                 "Separator to use to split columns (regex)", NULL, is_term);
}