action_dialog.c

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/***********************************************************************
 Freeciv - Copyright (C) 1996-2005 - Freeciv Development Team
   This program 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 2, or (at your option)
   any later version.
 
   This program 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.
***********************************************************************/
 
#ifdef HAVE_CONFIG_H
#include <fc_config.h>
#endif
 
#include <gtk/gtk.h>
 
/* utility */
#include "astring.h"
#include "support.h"
 
/* common */
#include "actions.h"
#include "game.h"
#include "traderoutes.h"
#include "movement.h"
#include "research.h"
#include "unit.h"
#include "unitlist.h"
 
/* client */
#include "dialogs_g.h"
#include "chatline.h"
#include "choice_dialog.h"
#include "client_main.h"
#include "climisc.h"
#include "connectdlg_common.h"
#include "control.h"
#include "gui_main.h"
#include "gui_stuff.h"
#include "mapview.h"
#include "packhand.h"
#include "text.h"
 
/* client/gui-gtk-3.22 */
#include "citydlg.h"
#include "dialogs.h"
#include "unitselextradlg.h"
#include "unitselunitdlg.h"
#include "wldlg.h"
 
/* Locations for non action enabler controlled buttons. */
#define BUTTON_NEW_UNIT_TGT (ACTION_COUNT + 1)
#define BUTTON_NEW_EXTRA_TGT (BUTTON_NEW_UNIT_TGT + 1)
#define BUTTON_LOCATION (BUTTON_NEW_EXTRA_TGT + 1)
#define BUTTON_WAIT (BUTTON_LOCATION + 1)
#define BUTTON_CANCEL (BUTTON_WAIT + 1)
#define BUTTON_COUNT (BUTTON_CANCEL + 1)
 
#define BUTTON_NOT_THERE -1
 
 
static GtkWidget *act_sel_dialog;
static int action_button_map[BUTTON_COUNT];
 
static int actor_unit_id;
static int target_ids[ATK_COUNT];
static int target_extra_id;
static bool is_more_user_input_needed = FALSE;
static bool did_not_decide = FALSE;
static bool action_selection_restart = FALSE;
 
static GtkWidget  *spy_tech_shell;
 
static GtkWidget  *spy_sabotage_shell;
 
/* A structure to hold parameters for actions inside the GUI instead of
 * storing the needed data in a global variable. */
struct action_data {
  action_id act_id;
  int actor_unit_id;
  int target_city_id;
  int target_unit_id;
  int target_tile_id;
  int target_building_id;
  int target_tech_id;
  int target_extra_id;
};
 
/* TODO: maybe this should be in the dialog itself? */
static struct action_data *act_sel_dialog_data;
 
/**********************************************************************/
static struct action_data *act_data(action_id act_id,
                                    int actor_id,
                                    int target_city_id,
                                    int target_unit_id,
                                    int target_tile_id,
                                    int target_building_id,
                                    int target_tech_id,
                                    int tgt_extra_id)
{
  struct action_data *data = fc_malloc(sizeof(*data));
 
  data->act_id = act_id;
  data->actor_unit_id = actor_id;
  data->target_city_id = target_city_id;
  data->target_unit_id = target_unit_id;
  data->target_tile_id = target_tile_id;
  data->target_building_id = target_building_id;
  data->target_tech_id = target_tech_id;
  data->target_extra_id = tgt_extra_id;
 
  return data;
}
 
/**********************************************************************/
static void diplomat_queue_handle_primary(void)
{
  if (!is_more_user_input_needed) {
    /* The client isn't waiting for information for any unanswered follow
     * up questions. */
 
    struct unit *actor_unit;
 
    if ((actor_unit = game_unit_by_number(actor_unit_id))) {
      /* The action selection dialog wasn't closed because the actor unit
       * was lost. */
 
      /* The probabilities didn't just disappear, right? */
      fc_assert_action(actor_unit->client.act_prob_cache,
                       client_unit_init_act_prob_cache(actor_unit));
 
      FC_FREE(actor_unit->client.act_prob_cache);
    }
 
    if (action_selection_restart) {
      /* The action selection dialog was closed but only so it can be
       * redrawn with fresh data. */
 
      action_selection_restart = FALSE;
    } else {
      /* The action selection process is over, at least for now. */
      action_selection_no_longer_in_progress(actor_unit_id);
    }
 
    if (did_not_decide) {
      /* The action selection dialog was closed but the player didn't
       * decide what the unit should do. */
 
      /* Reset so the next action selection dialog does the right thing. */
      did_not_decide = FALSE;
    } else {
      /* An action, or no action at all, was selected. */
      action_decision_clear_want(actor_unit_id);
      action_selection_next_in_focus(actor_unit_id);
    }
  }
}
 
/**********************************************************************/
static void diplomat_queue_handle_secondary(void)
{
  /* Stop waiting. Move on to the next queued unit. */
  is_more_user_input_needed = FALSE;
  diplomat_queue_handle_primary();
}
 
/**********************************************************************/
void action_selection_no_longer_in_progress_gui_specific(int actor_id)
{
  /* Stop assuming the answer to a follow up question will arrive. */
  is_more_user_input_needed = FALSE;
}
 
/**********************************************************************/
static action_id get_non_targeted_action_id(action_id tgt_action_id)
{
  /* Don't add an action mapping here unless the non targeted version is
   * selectable in the targeted version's target selection dialog. */
  switch ((enum gen_action)tgt_action_id) {
  case ACTION_SPY_TARGETED_SABOTAGE_CITY:
    return ACTION_SPY_SABOTAGE_CITY;
  case ACTION_SPY_TARGETED_SABOTAGE_CITY_ESC:
    return ACTION_SPY_SABOTAGE_CITY_ESC;
  case ACTION_SPY_TARGETED_STEAL_TECH:
    return ACTION_SPY_STEAL_TECH;
  case ACTION_SPY_TARGETED_STEAL_TECH_ESC:
    return ACTION_SPY_STEAL_TECH_ESC;
  default:
    /* No non targeted version found. */
    return ACTION_NONE;
  }
}
 
/**********************************************************************/
static action_id get_production_targeted_action_id(action_id tgt_action_id)
{
  /* Don't add an action mapping here unless the non targeted version is
   * selectable in the targeted version's target selection dialog. */
  switch ((enum gen_action)tgt_action_id) {
  case ACTION_SPY_TARGETED_SABOTAGE_CITY:
    return ACTION_SPY_SABOTAGE_CITY_PRODUCTION;
  case ACTION_SPY_TARGETED_SABOTAGE_CITY_ESC:
    return ACTION_SPY_SABOTAGE_CITY_PRODUCTION_ESC;
  case ACTION_STRIKE_BUILDING:
    return ACTION_STRIKE_PRODUCTION;
  default:
    /* No non targeted version found. */
    return ACTION_NONE;
  }
}
 
/**********************************************************************/
static void simple_action_callback(GtkWidget *w, gpointer data)
{
  int actor_id, target_id, sub_target;
  struct action *paction;
 
  struct action_data *args = act_sel_dialog_data;
 
  bool failed = FALSE;
 
  /* Data */
  args->act_id = GPOINTER_TO_INT(data);
  paction = action_by_number(args->act_id);
 
  /* Actor */
  fc_assert(action_get_actor_kind(paction) == AAK_UNIT);
  actor_id = args->actor_unit_id;
  if (NULL == game_unit_by_number(actor_id)) {
    /* Probably dead. */
    failed = TRUE;
  }
 
  /* Target */
  target_id = IDENTITY_NUMBER_ZERO;
  switch (action_get_target_kind(paction)) {
  case ATK_CITY:
    target_id = args->target_city_id;
    if (NULL == game_city_by_number(target_id)) {
      /* Probably destroyed. */
      failed = TRUE;
    }
    break;
  case ATK_UNIT:
    target_id = args->target_unit_id;
    if (NULL == game_unit_by_number(target_id)) {
      /* Probably dead. */
      failed = TRUE;
    }
    break;
  case ATK_STACK:
  case ATK_TILE:
  case ATK_EXTRAS:
    target_id = args->target_tile_id;
    if (NULL == index_to_tile(&(wld.map), target_id)) {
      /* TODO: Should this be possible at all? If not: add assertion. */
      failed = TRUE;
    }
    break;
  case ATK_SELF:
    target_id = IDENTITY_NUMBER_ZERO;
    break;
  case ATK_COUNT:
    fc_assert(action_get_target_kind(paction) != ATK_COUNT);
    failed = TRUE;
  }
 
  /* Sub target. */
  sub_target = NO_TARGET;
  if (paction->target_complexity != ACT_TGT_COMPL_SIMPLE) {
    switch (action_get_sub_target_kind(paction)) {
    case ASTK_BUILDING:
      sub_target = args->target_building_id;
      if (NULL == improvement_by_number(sub_target)) {
        /* Did the ruleset change? */
        failed = TRUE;
      }
      break;
    case ASTK_TECH:
      sub_target = args->target_tech_id;
      if (NULL == valid_advance_by_number(sub_target)) {
        /* Did the ruleset change? */
        failed = TRUE;
      }
      break;
    case ASTK_EXTRA:
    case ASTK_EXTRA_NOT_THERE:
      /* TODO: validate if the extra is there? */
      sub_target = args->target_extra_id;
      if (NULL == extra_by_number(sub_target)) {
        /* Did the ruleset change? */
        failed = TRUE;
      }
      break;
    case ASTK_NONE:
    case ASTK_COUNT:
      /* Shouldn't happen. */
      fc_assert(action_get_sub_target_kind(paction) != ASTK_NONE);
      failed = TRUE;
      break;
    }
  }
 
  /* Send request. */
  if (!failed) {
    request_do_action(paction->id, actor_id, target_id, sub_target, "");
  }
 
  /* Clean up. */
  gtk_widget_destroy(act_sel_dialog);
  /* No follow up questions. */
  act_sel_dialog_data = NULL;
  FC_FREE(args);
}
 
/**********************************************************************/
static void request_action_details_callback(GtkWidget *w, gpointer data)
{
  int actor_id, target_id;
  struct action *paction;
 
  struct action_data *args = act_sel_dialog_data;
 
  bool failed = FALSE;
 
  /* Data */
  args->act_id = GPOINTER_TO_INT(data);
  paction = action_by_number(args->act_id);
 
  /* Actor */
  fc_assert(action_get_actor_kind(paction) == AAK_UNIT);
  actor_id = args->actor_unit_id;
  if (NULL == game_unit_by_number(actor_id)) {
    /* Probably dead. */
    failed = TRUE;
  }
 
  /* Target */
  target_id = IDENTITY_NUMBER_ZERO;
  switch (action_get_target_kind(paction)) {
  case ATK_CITY:
    target_id = args->target_city_id;
    if (NULL == game_city_by_number(target_id)) {
      /* Probably destroyed. */
      failed = TRUE;
    }
    break;
  case ATK_UNIT:
    target_id = args->target_unit_id;
    if (NULL == game_unit_by_number(target_id)) {
      /* Probably dead. */
      failed = TRUE;
    }
    break;
  case ATK_STACK:
  case ATK_TILE:
  case ATK_EXTRAS:
    target_id = args->target_tile_id;
    if (NULL == index_to_tile(&(wld.map), target_id)) {
      /* TODO: Should this be possible at all? If not: add assertion. */
      failed = TRUE;
    }
    break;
  case ATK_SELF:
    target_id = IDENTITY_NUMBER_ZERO;
    break;
  case ATK_COUNT:
    fc_assert(action_get_target_kind(paction) != ATK_COUNT);
    failed = TRUE;
  }
 
  /* Send request. */
  if (!failed) {
    request_action_details(paction->id, actor_id, target_id);
  }
 
  /* Wait for the server's reply before moving on to the next unit that
   * needs to know what action to take. */
  is_more_user_input_needed = TRUE;
 
  /* Clean up. */
  gtk_widget_destroy(act_sel_dialog);
  /* No client side follow up questions. */
  act_sel_dialog_data = NULL;
  FC_FREE(args);
}
 
/**********************************************************************/
static void found_city_callback(GtkWidget *w, gpointer data)
{
  struct action_data *args = act_sel_dialog_data;
 
  dsend_packet_city_name_suggestion_req(&client.conn,
                                        args->actor_unit_id);
 
  gtk_widget_destroy(act_sel_dialog);
  free(args);
}
 
/**********************************************************************/
static void upgrade_callback(GtkWidget *w, gpointer data)
{
  struct unit *punit;
 
  struct action_data *args = act_sel_dialog_data;
 
  if ((punit = game_unit_by_number(args->actor_unit_id))
      && NULL != game_city_by_number(args->target_city_id)) {
    struct unit_list *as_list;
 
    as_list = unit_list_new();
    unit_list_append(as_list, punit);
    popup_upgrade_dialog(as_list);
    unit_list_destroy(as_list);
  }
 
  gtk_widget_destroy(act_sel_dialog);
  free(args);
}
 
/**********************************************************************/
static void bribe_unit_response(GtkWidget *w, gint response, gpointer data)
{
  struct action_data *args = (struct action_data *)data;
 
  if (response == GTK_RESPONSE_YES) {
    request_do_action(args->act_id, args->actor_unit_id,
                      args->target_unit_id, 0, "");
  }
 
  gtk_widget_destroy(w);
  free(args);
 
  /* The user have answered the follow up question. Move on. */
  diplomat_queue_handle_secondary();
}
 
/**********************************************************************/
static void bribe_stack_response(GtkWidget *w, gint response, gpointer data)
{
  struct action_data *args = (struct action_data *)data;
 
  if (response == GTK_RESPONSE_YES) {
    request_do_action(args->act_id, args->actor_unit_id,
                      args->target_tile_id, 0, "");
  }
 
  gtk_widget_destroy(w);
  free(args);
 
  /* The user have answered the follow up question. Move on. */
  diplomat_queue_handle_secondary();
}
 
/**********************************************************************/
void popup_bribe_unit_dialog(struct unit *actor, struct unit *punit, int cost,
                             const struct action *paction)
{
  GtkWidget *shell;
  char buf[1024];
 
  fc_snprintf(buf, ARRAY_SIZE(buf), PL_("Treasury contains %d gold.",
                                        "Treasury contains %d gold.",
                                        client_player()->economic.gold),
              client_player()->economic.gold);
 
  if (cost <= client_player()->economic.gold) {
    shell = gtk_message_dialog_new(NULL, 0,
      GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO,
      /* TRANS: %s is pre-pluralised "Treasury contains %d gold." */
      PL_("Bribe unit for %d gold?\n%s",
          "Bribe unit for %d gold?\n%s", cost), cost, buf);
    gtk_window_set_title(GTK_WINDOW(shell), _("Bribe Enemy Unit"));
    setup_dialog(shell, toplevel);
  } else {
    shell = gtk_message_dialog_new(NULL, 0,
      GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE,
      /* TRANS: %s is pre-pluralised "Treasury contains %d gold." */
      PL_("Bribing the unit costs %d gold.\n%s",
          "Bribing the unit costs %d gold.\n%s", cost), cost, buf);
    gtk_window_set_title(GTK_WINDOW(shell), _("Traitors Demand Too Much!"));
    setup_dialog(shell, toplevel);
  }
  gtk_window_present(GTK_WINDOW(shell));
 
  g_signal_connect(shell, "response", G_CALLBACK(bribe_unit_response),
                   act_data(paction->id, actor->id,
                            0, punit->id, 0,
                            0, 0, 0));
}
 
/**********************************************************************/
void popup_bribe_stack_dialog(struct unit *actor, struct tile *ptile, int cost,
                              const struct action *paction)
{
  GtkWidget *shell;
  char buf[1024];
 
  fc_snprintf(buf, ARRAY_SIZE(buf), PL_("Treasury contains %d gold.",
                                        "Treasury contains %d gold.",
                                        client_player()->economic.gold),
              client_player()->economic.gold);
 
  if (cost <= client_player()->economic.gold) {
    shell = gtk_message_dialog_new(NULL, 0,
      GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO,
      /* TRANS: %s is pre-pluralised "Treasury contains %d gold." */
      PL_("Bribe unit stack for %d gold?\n%s",
          "Bribe unit stack for %d gold?\n%s", cost), cost, buf);
    gtk_window_set_title(GTK_WINDOW(shell), _("Bribe Enemy Unit"));
    setup_dialog(shell, toplevel);
  } else {
    shell = gtk_message_dialog_new(NULL, 0,
      GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE,
      /* TRANS: %s is pre-pluralised "Treasury contains %d gold." */
      PL_("Bribing units costs %d gold.\n%s",
          "Bribing units costs %d gold.\n%s", cost), cost, buf);
    gtk_window_set_title(GTK_WINDOW(shell), _("Traitors Demand Too Much!"));
    setup_dialog(shell, toplevel);
  }
  gtk_window_present(GTK_WINDOW(shell));
 
  g_signal_connect(shell, "response", G_CALLBACK(bribe_stack_response),
                   act_data(paction->id, actor->id,
                            0, 0, ptile->index,
                            0, 0, 0));
}
 
/**********************************************************************/
static void spy_advances_response(GtkWidget *w, gint response,
                                  gpointer data)
{
  struct action_data *args = (struct action_data *)data;
 
  if (response == GTK_RESPONSE_ACCEPT && args->target_tech_id > 0) {
    if (NULL != game_unit_by_number(args->actor_unit_id)
        && NULL != game_city_by_number(args->target_city_id)) {
      if (args->target_tech_id == A_UNSET) {
        /* This is the untargeted version. */
        request_do_action(get_non_targeted_action_id(args->act_id),
                          args->actor_unit_id, args->target_city_id,
                          args->target_tech_id, "");
      } else {
        /* This is the targeted version. */
        request_do_action(args->act_id,
                          args->actor_unit_id, args->target_city_id,
                          args->target_tech_id, "");
      }
    }
  }
 
  gtk_widget_destroy(spy_tech_shell);
  spy_tech_shell = NULL;
  free(data);
 
  /* The user have answered the follow up question. Move on. */
  diplomat_queue_handle_secondary();
}
 
/**********************************************************************/
static void spy_advances_callback(GtkTreeSelection *select,
                                  gpointer data)
{
  struct action_data *args = (struct action_data *)data;
 
  GtkTreeModel *model;
  GtkTreeIter it;
 
  if (gtk_tree_selection_get_selected(select, &model, &it)) {
    gtk_tree_model_get(model, &it, 1, &(args->target_tech_id), -1);
    
    gtk_dialog_set_response_sensitive(GTK_DIALOG(spy_tech_shell),
      GTK_RESPONSE_ACCEPT, TRUE);
  } else {
    args->target_tech_id = 0;
          
    gtk_dialog_set_response_sensitive(GTK_DIALOG(spy_tech_shell),
      GTK_RESPONSE_ACCEPT, FALSE);
  }
}
 
/**********************************************************************/
static void create_advances_list(struct player *pplayer,
                                 struct player *pvictim,
                                 struct action_data *args)
{  
  GtkWidget *sw, *label, *vbox, *view;
  GtkListStore *store;
  GtkCellRenderer *rend;
  GtkTreeViewColumn *col;
 
  struct unit *actor_unit = game_unit_by_number(args->actor_unit_id);
 
  spy_tech_shell = gtk_dialog_new_with_buttons(_("Steal Technology"),
                                               NULL, 0,
                                               _("_Cancel"), GTK_RESPONSE_CANCEL,
                                               _("_Steal"), GTK_RESPONSE_ACCEPT,
                                               NULL);
  setup_dialog(spy_tech_shell, toplevel);
  gtk_window_set_position(GTK_WINDOW(spy_tech_shell), GTK_WIN_POS_MOUSE);
 
  gtk_dialog_set_default_response(GTK_DIALOG(spy_tech_shell),
                                  GTK_RESPONSE_ACCEPT);
 
  label = gtk_frame_new(_("Select Advance to Steal"));
  gtk_container_add(GTK_CONTAINER(gtk_dialog_get_content_area(GTK_DIALOG(spy_tech_shell))), label);
 
  vbox = gtk_grid_new();
  gtk_orientable_set_orientation(GTK_ORIENTABLE(vbox),
                                 GTK_ORIENTATION_VERTICAL);
  gtk_grid_set_row_spacing(GTK_GRID(vbox), 6);
  gtk_container_add(GTK_CONTAINER(label), vbox);
      
  store = gtk_list_store_new(2, G_TYPE_STRING, G_TYPE_INT);
 
  view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(store));
  gtk_widget_set_hexpand(view, TRUE);
  gtk_widget_set_vexpand(view, TRUE);
  g_object_unref(store);
  gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(view), FALSE);
 
  rend = gtk_cell_renderer_text_new();
  col = gtk_tree_view_column_new_with_attributes(NULL, rend,
                                                 "text", 0, NULL);
  gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
 
  label = g_object_new(GTK_TYPE_LABEL,
    "use-underline", TRUE,
    "mnemonic-widget", view,
    "label", _("_Advances:"),
    "xalign", 0.0,
    "yalign", 0.5,
    NULL);
  gtk_container_add(GTK_CONTAINER(vbox), label);
  
  sw = gtk_scrolled_window_new(NULL, NULL);
  gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(sw),
                                      GTK_SHADOW_ETCHED_IN);
  gtk_container_add(GTK_CONTAINER(sw), view);
 
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw),
    GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);
  gtk_widget_set_size_request(sw, -1, 200);
  
  gtk_container_add(GTK_CONTAINER(vbox), sw);
 
  /* Now populate the list */
  if (pvictim) { /* you don't want to know what lag can do -- Syela */
    const struct research *presearch = research_get(pplayer);
    const struct research *vresearch = research_get(pvictim);
    GtkTreeIter it;
    GValue value = { 0, };
 
    advance_index_iterate(A_FIRST, i) {
      if (research_invention_gettable(presearch, i,
                                      game.info.tech_steal_allow_holes)
          && research_invention_state(vresearch, i) == TECH_KNOWN
          && research_invention_state(presearch, i) != TECH_KNOWN) {
        gtk_list_store_append(store, &it);
 
        g_value_init(&value, G_TYPE_STRING);
        g_value_set_static_string(&value, research_advance_name_translation
                                              (presearch, i));
        gtk_list_store_set_value(store, &it, 0, &value);
        g_value_unset(&value);
        gtk_list_store_set(store, &it, 1, i, -1);
      }
    } advance_index_iterate_end;
 
    if (action_prob_possible(actor_unit->client.act_prob_cache[
                             get_non_targeted_action_id(args->act_id)])) {
      gtk_list_store_append(store, &it);
 
      g_value_init(&value, G_TYPE_STRING);
      {
        struct astring str = ASTRING_INIT;
        /* TRANS: %s is a unit name, e.g., Spy */
        astr_set(&str, _("At %s's Discretion"),
                 unit_name_translation(actor_unit));
        g_value_set_string(&value, astr_str(&str));
        astr_free(&str);
      }
      gtk_list_store_set_value(store, &it, 0, &value);
      g_value_unset(&value);
      gtk_list_store_set(store, &it, 1, A_UNSET, -1);
    }
  }
 
  gtk_dialog_set_response_sensitive(GTK_DIALOG(spy_tech_shell),
    GTK_RESPONSE_ACCEPT, FALSE);
  
  gtk_widget_show_all(gtk_dialog_get_content_area(GTK_DIALOG(spy_tech_shell)));
 
  g_signal_connect(gtk_tree_view_get_selection(GTK_TREE_VIEW(view)), "changed",
                   G_CALLBACK(spy_advances_callback), args);
  g_signal_connect(spy_tech_shell, "response",
                   G_CALLBACK(spy_advances_response), args);
  
  args->target_tech_id = 0;
 
  gtk_tree_view_focus(GTK_TREE_VIEW(view));
}
 
/**********************************************************************/
static void spy_improvements_response(GtkWidget *w, gint response, gpointer data)
{
  struct action_data *args = (struct action_data *)data;
 
  if (response == GTK_RESPONSE_ACCEPT && args->target_building_id > -2) {
    if (NULL != game_unit_by_number(args->actor_unit_id)
        && NULL != game_city_by_number(args->target_city_id)) {
      if (args->target_building_id == B_LAST) {
        /* This is the untargeted version. */
        request_do_action(get_non_targeted_action_id(args->act_id),
                          args->actor_unit_id,
                          args->target_city_id,
                          args->target_building_id, "");
      } else if (args->target_building_id == -1) {
        /* This is the city production version. */
        request_do_action(get_production_targeted_action_id(args->act_id),
                          args->actor_unit_id,
                          args->target_city_id,
                          args->target_building_id, "");
      } else {
        /* This is the targeted version. */
        request_do_action(args->act_id,
                          args->actor_unit_id,
                          args->target_city_id,
                          args->target_building_id, "");
      }
    }
  }
 
  gtk_widget_destroy(spy_sabotage_shell);
  spy_sabotage_shell = NULL;
  free(args);
 
  /* The user have answered the follow up question. Move on. */
  diplomat_queue_handle_secondary();
}
 
/**********************************************************************/
static void spy_improvements_callback(GtkTreeSelection *select, gpointer data)
{
  struct action_data *args = (struct action_data *)data;
 
  GtkTreeModel *model;
  GtkTreeIter it;
 
  if (gtk_tree_selection_get_selected(select, &model, &it)) {
    gtk_tree_model_get(model, &it, 1, &(args->target_building_id), -1);
    
    gtk_dialog_set_response_sensitive(GTK_DIALOG(spy_sabotage_shell),
      GTK_RESPONSE_ACCEPT, TRUE);
  } else {
    args->target_building_id = -2;
          
    gtk_dialog_set_response_sensitive(GTK_DIALOG(spy_sabotage_shell),
      GTK_RESPONSE_ACCEPT, FALSE);
  }
}
 
/**********************************************************************/
static void create_improvements_list(struct player *pplayer,
                                     struct city *pcity,
                                     struct action_data *args)
{  
  GtkWidget *sw, *label, *vbox, *view;
  GtkListStore *store;
  GtkCellRenderer *rend;
  GtkTreeViewColumn *col;
  GtkTreeIter it;
 
  struct unit *actor_unit = game_unit_by_number(args->actor_unit_id);
  
  spy_sabotage_shell = gtk_dialog_new_with_buttons(_("Sabotage Improvements"),
                                                   NULL, 0,
                                                   _("_Cancel"), GTK_RESPONSE_CANCEL,
                                                   _("_Sabotage"), GTK_RESPONSE_ACCEPT,
                                                   NULL);
  setup_dialog(spy_sabotage_shell, toplevel);
  gtk_window_set_position(GTK_WINDOW(spy_sabotage_shell), GTK_WIN_POS_MOUSE);
 
  gtk_dialog_set_default_response(GTK_DIALOG(spy_sabotage_shell),
                                  GTK_RESPONSE_ACCEPT);
 
  label = gtk_frame_new(_("Select Improvement to Sabotage"));
  gtk_container_add(GTK_CONTAINER(gtk_dialog_get_content_area(GTK_DIALOG(spy_sabotage_shell))), label);
 
  vbox = gtk_grid_new();
  gtk_orientable_set_orientation(GTK_ORIENTABLE(vbox),
                                 GTK_ORIENTATION_VERTICAL);
  gtk_grid_set_row_spacing(GTK_GRID(vbox), 6);
  gtk_container_add(GTK_CONTAINER(label), vbox);
      
  store = gtk_list_store_new(2, G_TYPE_STRING, G_TYPE_INT);
 
  view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(store));
  gtk_widget_set_hexpand(view, TRUE);
  gtk_widget_set_vexpand(view, TRUE);
  g_object_unref(store);
  gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(view), FALSE);
 
  rend = gtk_cell_renderer_text_new();
  col = gtk_tree_view_column_new_with_attributes(NULL, rend,
                                                 "text", 0, NULL);
  gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
 
  label = g_object_new(GTK_TYPE_LABEL,
    "use-underline", TRUE,
    "mnemonic-widget", view,
    "label", _("_Improvements:"),
    "xalign", 0.0,
    "yalign", 0.5,
    NULL);
  gtk_container_add(GTK_CONTAINER(vbox), label);
  
  sw = gtk_scrolled_window_new(NULL, NULL);
  gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(sw),
                                      GTK_SHADOW_ETCHED_IN);
  gtk_container_add(GTK_CONTAINER(sw), view);
 
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw),
    GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);
  gtk_scrolled_window_set_min_content_height(GTK_SCROLLED_WINDOW(sw), 200);
  
  gtk_container_add(GTK_CONTAINER(vbox), sw);
 
  /* Now populate the list */
  if (action_prob_possible(actor_unit->client.act_prob_cache[
                           get_production_targeted_action_id(
                               args->act_id)])) {
    gtk_list_store_append(store, &it);
    gtk_list_store_set(store, &it, 0, _("City Production"), 1, -1, -1);
  }
 
  city_built_iterate(pcity, pimprove) {
    if (pimprove->sabotage > 0) {
      gtk_list_store_append(store, &it);
      gtk_list_store_set(store, &it,
                         0, city_improvement_name_translation(pcity, pimprove),
                         1, improvement_number(pimprove),
                         -1);
    }  
  } city_built_iterate_end;
 
  if (action_prob_possible(actor_unit->client.act_prob_cache[
                           get_non_targeted_action_id(args->act_id)])) {
    struct astring str = ASTRING_INIT;
 
    gtk_list_store_append(store, &it);
 
    /* TRANS: %s is a unit name, e.g., Spy */
    astr_set(&str, _("At %s's Discretion"),
             unit_name_translation(actor_unit));
    gtk_list_store_set(store, &it, 0, astr_str(&str), 1, B_LAST, -1);
 
    astr_free(&str);
  }
 
  gtk_dialog_set_response_sensitive(GTK_DIALOG(spy_sabotage_shell),
    GTK_RESPONSE_ACCEPT, FALSE);
  
  gtk_widget_show_all(gtk_dialog_get_content_area(GTK_DIALOG(spy_sabotage_shell)));
 
  g_signal_connect(gtk_tree_view_get_selection(GTK_TREE_VIEW(view)), "changed",
                   G_CALLBACK(spy_improvements_callback), args);
  g_signal_connect(spy_sabotage_shell, "response",
                   G_CALLBACK(spy_improvements_response), args);
 
  args->target_building_id = -2;
          
  gtk_tree_view_focus(GTK_TREE_VIEW(view));
}
 
/**********************************************************************/
static void spy_steal_popup_shared(GtkWidget *w, gpointer data)
{
  struct action_data *args = (struct action_data *)data;
 
  args->act_id = args->act_id;
 
  struct city *pvcity = game_city_by_number(args->target_city_id);
  struct player *pvictim = NULL;
 
  if (pvcity) {
    pvictim = city_owner(pvcity);
  }
 
/* it is concievable that pvcity will not be found, because something
has happened to the city during latency.  Therefore we must initialize
pvictim to NULL and account for !pvictim in create_advances_list. -- Syela */
 
  /* FIXME: Don't discard the second tech choice dialog. */
  if (!spy_tech_shell) {
    create_advances_list(client.conn.playing, pvictim, args);
    gtk_window_present(GTK_WINDOW(spy_tech_shell));
  } else {
    free(args);
  }
 
  /* Wait for the player's reply before moving on to the next unit that
   * needs to know what action to take. */
  is_more_user_input_needed = TRUE;
 
  gtk_widget_destroy(act_sel_dialog);
}
 
/**********************************************************************/
static void spy_steal_popup(GtkWidget *w, gpointer data)
{
  act_sel_dialog_data->act_id = ACTION_SPY_TARGETED_STEAL_TECH;
  spy_steal_popup_shared(w, act_sel_dialog_data);
}
 
/**********************************************************************/
static void spy_steal_esc_popup(GtkWidget *w, gpointer data)
{
  act_sel_dialog_data->act_id = ACTION_SPY_TARGETED_STEAL_TECH_ESC;
  spy_steal_popup_shared(w, act_sel_dialog_data);
}
 
/**********************************************************************/
void popup_sabotage_dialog(struct unit *actor, struct city *pcity,
                           const struct action *paction)
{
  /* FIXME: Don't discard the second target choice dialog. */
  if (!spy_sabotage_shell) {
    create_improvements_list(client.conn.playing, pcity,
                             act_data(paction->id,
                                      actor->id, pcity->id, 0, 0,
                                      0, 0, 0));
    gtk_window_present(GTK_WINDOW(spy_sabotage_shell));
  }
}
 
/**********************************************************************/
static void incite_response(GtkWidget *w, gint response, gpointer data)
{
  struct action_data *args = (struct action_data *)data;
 
  if (response == GTK_RESPONSE_YES) {
    request_do_action(args->act_id, args->actor_unit_id,
                      args->target_city_id, 0, "");
  }
 
  gtk_widget_destroy(w);
  free(args);
 
  /* The user have answered the follow up question. Move on. */
  diplomat_queue_handle_secondary();
}
 
/**********************************************************************/
void popup_incite_dialog(struct unit *actor, struct city *pcity, int cost,
                         const struct action *paction)
{
  GtkWidget *shell;
  char buf[1024];
 
  fc_snprintf(buf, ARRAY_SIZE(buf), PL_("Treasury contains %d gold.",
                                        "Treasury contains %d gold.",
                                        client_player()->economic.gold),
              client_player()->economic.gold);
 
  if (INCITE_IMPOSSIBLE_COST == cost) {
    shell = gtk_message_dialog_new(NULL, 0,
                                   GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE,
                                   _("You can't incite a revolt in %s."),
                                   city_name_get(pcity));
    gtk_window_set_title(GTK_WINDOW(shell), _("City can't be incited!"));
  setup_dialog(shell, toplevel);
  } else if (cost <= client_player()->economic.gold) {
    shell = gtk_message_dialog_new(NULL, 0,
      GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO,
      /* TRANS: %s is pre-pluralised "Treasury contains %d gold." */
      PL_("Incite a revolt for %d gold?\n%s",
          "Incite a revolt for %d gold?\n%s", cost), cost, buf);
    gtk_window_set_title(GTK_WINDOW(shell), _("Incite a Revolt!"));
    setup_dialog(shell, toplevel);
  } else {
    shell = gtk_message_dialog_new(NULL,
      0,
      GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE,
      /* TRANS: %s is pre-pluralised "Treasury contains %d gold." */
      PL_("Inciting a revolt costs %d gold.\n%s",
          "Inciting a revolt costs %d gold.\n%s", cost), cost, buf);
    gtk_window_set_title(GTK_WINDOW(shell), _("Traitors Demand Too Much!"));
    setup_dialog(shell, toplevel);
  }
  gtk_window_present(GTK_WINDOW(shell));
  
  g_signal_connect(shell, "response", G_CALLBACK(incite_response),
                   act_data(paction->id, actor->id,
                            pcity->id, 0, 0,
                            0, 0, 0));
}
 
/**********************************************************************/
static void tgt_unit_change_callback(GtkWidget *dlg, gint arg)
{
  int au_id = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(dlg), "actor"));
 
  if (arg == GTK_RESPONSE_YES) {
    struct unit *actor = game_unit_by_number(au_id);
 
    if (actor != NULL) {
      int tgt_id = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(dlg),
                                                     "target"));
      struct unit *tgt_unit = game_unit_by_number(tgt_id);
      struct tile *tgt_tile = g_object_get_data(G_OBJECT(dlg), "tile");
 
      if (tgt_unit == NULL) {
        /* Make the action dialog pop up again. */
        dsend_packet_unit_get_actions(&client.conn,
                                      actor->id,
                                      /* Let the server choose the target
                                       * unit. */
                                      IDENTITY_NUMBER_ZERO,
                                      tgt_tile->index,
                                      action_selection_target_extra(),
                                      REQEST_PLAYER_INITIATED);
      } else {
        dsend_packet_unit_get_actions(&client.conn,
                                      actor->id,
                                      tgt_id,
                                      tgt_tile->index,
                                      action_selection_target_extra(),
                                      REQEST_PLAYER_INITIATED);
      }
    }
  } else {
    /* Dialog canceled. This ends the action selection process. */
    action_selection_no_longer_in_progress(au_id);
  }
 
  gtk_widget_destroy(dlg);
}
 
/**********************************************************************/
static void act_sel_new_unit_tgt_callback(GtkWidget *w, gpointer data)
{
  struct action_data *args = act_sel_dialog_data;
 
  struct unit *punit;
  struct unit *tunit;
  struct tile *ptile;
 
  if ((punit = game_unit_by_number(args->actor_unit_id))
      && (ptile = index_to_tile(&(wld.map), args->target_tile_id))
      && (tunit = game_unit_by_number(args->target_unit_id))) {
    select_tgt_unit(punit, ptile, ptile->units, tunit,
                    _("Target unit selection"),
                    _("Looking for target unit:"),
                    _("Units at tile:"),
                    _("Select"),
                    G_CALLBACK(tgt_unit_change_callback));
  }
 
  did_not_decide = TRUE;
  action_selection_restart = TRUE;
  gtk_widget_destroy(act_sel_dialog);
  free(args);
}
 
/**********************************************************************/
static void tgt_extra_change_callback(GtkWidget *dlg, gint arg)
{
  int au_id = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(dlg), "actor"));
 
  if (arg == GTK_RESPONSE_YES) {
    struct unit *actor = game_unit_by_number(au_id);
 
    if (actor != NULL) {
      int tgt_id = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(dlg),
                                                     "target"));
      struct extra_type *tgt_extra = extra_by_number(tgt_id);
      struct tile *tgt_tile = g_object_get_data(G_OBJECT(dlg), "tile");
 
      if (tgt_extra == NULL) {
        /* Make the action dialog pop up again. */
        dsend_packet_unit_get_actions(&client.conn,
                                      actor->id,
                                      action_selection_target_unit(),
                                      tgt_tile->index,
                                      /* Let the server choose the target
                                       * extra. */
                                      action_selection_target_extra(),
                                      REQEST_PLAYER_INITIATED);
      } else {
        dsend_packet_unit_get_actions(&client.conn,
                                      actor->id,
                                      action_selection_target_unit(),
                                      tgt_tile->index,
                                      tgt_id,
                                      REQEST_PLAYER_INITIATED);
      }
    }
  } else {
    /* Dialog canceled. This ends the action selection process. */
    action_selection_no_longer_in_progress(au_id);
  }
 
  gtk_widget_destroy(dlg);
}
 
/**********************************************************************/
static void act_sel_new_extra_tgt_callback(GtkWidget *w, gpointer data)
{
  struct action_data *args = act_sel_dialog_data;
 
  struct unit *act_unit;
  struct extra_type *tgt_extra;
  struct tile *tgt_tile;
 
  if ((act_unit = game_unit_by_number(args->actor_unit_id))
      && (tgt_tile = index_to_tile(&(wld.map), args->target_tile_id))
      && (tgt_extra = extra_by_number(args->target_extra_id))) {
    bv_extras potential_targets;
 
    /* Start with the extras at the tile */
    potential_targets = *tile_extras(tgt_tile);
 
    extra_type_re_active_iterate(pextra) {
      if (BV_ISSET(potential_targets, extra_number(pextra))) {
        /* This extra is at the tile. Can anything be done to it? */
        if (!utype_can_remove_extra(unit_type_get(act_unit),
                                    pextra)) {
          BV_CLR(potential_targets, extra_number(pextra));
        }
      } else {
        /* This extra isn't at the tile yet. Can it be created? */
        if (utype_can_create_extra(unit_type_get(act_unit),
                                   pextra)) {
          BV_SET(potential_targets, extra_number(pextra));
        }
      }
    } extra_type_re_active_iterate_end;
 
    select_tgt_extra(act_unit, tgt_tile, potential_targets, tgt_extra,
                     /* TRANS: GTK action selection dialog extra target
                      * selection dialog title. */
                     _("Target extra selection"),
                     /* TRANS: GTK action selection dialog extra target
                      * selection dialog actor unit label. */
                     _("Looking for target extra:"),
                     /* TRANS: GTK action selection dialog extra target
                      * selection dialog extra list label. */
                     _("Extra targets:"),
                     _("Select"),
                     G_CALLBACK(tgt_extra_change_callback));
  }
 
  did_not_decide = TRUE;
  action_selection_restart = TRUE;
  gtk_widget_destroy(act_sel_dialog);
  free(args);
}
 
/**********************************************************************/
static void act_sel_location_callback(GtkWidget *w, gpointer data)
{
  struct action_data *args = act_sel_dialog_data;
 
  struct unit *punit;
 
  if ((punit = game_unit_by_number(args->actor_unit_id))) {
    center_tile_mapcanvas(unit_tile(punit));
  }
}
 
/**********************************************************************/
static void act_sel_wait_callback(GtkWidget *w, gpointer data)
{
  struct action_data *args = act_sel_dialog_data;
 
  key_unit_wait();
 
  /* the dialog was destroyed when key_unit_wait() resulted in
   * action_selection_close() being called. */
 
  free(args);
}
 
/**********************************************************************/
static void act_sel_destroy_callback(GtkWidget *w, gpointer data)
{
  act_sel_dialog = NULL;
  diplomat_queue_handle_primary();
}
 
/**********************************************************************/
static void act_sel_cancel_callback(GtkWidget *w, gpointer data)
{
  gtk_widget_destroy(act_sel_dialog);
  free(act_sel_dialog_data);
}
 
/**********************************************************************/
static void act_sel_close_callback(GtkWidget *w,
                                   gint response_id,
                                   gpointer data)
{
  gtk_widget_destroy(act_sel_dialog);
  free(act_sel_dialog_data);
}
 
/* Mapping from an action to the function to call when its button is
 * pushed. */
static const GCallback af_map[ACTION_COUNT] = {
  /* Unit acting against a city target. */
  [ACTION_SPY_TARGETED_SABOTAGE_CITY] =
      (GCallback)request_action_details_callback,
  [ACTION_SPY_TARGETED_SABOTAGE_CITY_ESC] =
      (GCallback)request_action_details_callback,
  [ACTION_SPY_TARGETED_STEAL_TECH] = (GCallback)spy_steal_popup,
  [ACTION_SPY_TARGETED_STEAL_TECH_ESC] = (GCallback)spy_steal_esc_popup,
  [ACTION_SPY_INCITE_CITY] = (GCallback)request_action_details_callback,
  [ACTION_SPY_INCITE_CITY_ESC] = (GCallback)request_action_details_callback,
  [ACTION_UPGRADE_UNIT] = (GCallback)upgrade_callback,
  [ACTION_STRIKE_BUILDING] = (GCallback)request_action_details_callback,
 
  /* Unit acting against a unit target. */
  [ACTION_SPY_BRIBE_UNIT] = (GCallback)request_action_details_callback,
 
  /* Unit acting against all units at a tile. */
  [ACTION_SPY_BRIBE_STACK] = (GCallback)request_action_details_callback,
 
  /* Unit acting against a tile. */
  [ACTION_FOUND_CITY] = (GCallback)found_city_callback,
 
  /* Unit acting with no target except itself. */
  /* No special callback functions needed for any self targeted actions. */
};
 
/**********************************************************************/
static void action_entry(GtkWidget *shl,
                         action_id act_id,
                         const struct act_prob *act_probs,
                         const char *custom,
                         action_id act_num)
{
  const gchar *label;
  const gchar *tooltip;
  GCallback cb;
 
  if (af_map[act_id] == NULL) {
    /* No special call back function needed for this action. */
    cb = (GCallback)simple_action_callback;
  } else {
    /* Special action specific callback function specified. */
    cb = af_map[act_id];
  }
 
  /* Don't show disabled actions. */
  if (!action_prob_possible(act_probs[act_id])) {
    return;
  }
 
  label = action_prepare_ui_name(act_id, "_",
                                 act_probs[act_id],
                                 custom);
 
  tooltip = act_sel_action_tool_tip(action_by_number(act_id),
                                    act_probs[act_id]);
 
  action_button_map[act_id] = choice_dialog_get_number_of_buttons(shl);
  choice_dialog_add(shl, label, cb, GINT_TO_POINTER(act_num),
                    FALSE, tooltip);
}
 
/**********************************************************************/
static void action_entry_update(GtkWidget *shl,
                                action_id act_id,
                                const struct act_prob *act_probs,
                                const char *custom,
                                action_id act_num)
{
  const gchar *label;
  const gchar *tooltip;
 
  /* An action that just became impossible has its button disabled.
   * An action that became possible again must be re-enabled. */
  choice_dialog_button_set_sensitive(act_sel_dialog,
      action_button_map[act_id],
      action_prob_possible(act_probs[act_id]));
 
  /* The probability may have changed. */
  label = action_prepare_ui_name(act_id, "_",
                                 act_probs[act_id], custom);
 
  tooltip = act_sel_action_tool_tip(action_by_number(act_id),
                                    act_probs[act_id]);
 
  choice_dialog_button_set_label(act_sel_dialog,
                                 action_button_map[act_id],
                                 label);
  choice_dialog_button_set_tooltip(act_sel_dialog,
                                   action_button_map[act_id],
                                   tooltip);
}
 
/**********************************************************************/
void popup_action_selection(struct unit *actor_unit,
                            struct city *target_city,
                            struct unit *target_unit,
                            struct tile *target_tile,
                            struct extra_type *target_extra,
                            const struct act_prob *act_probs)
{
  GtkWidget *shl;
  struct astring title = ASTRING_INIT, text = ASTRING_INIT;
  struct city *actor_homecity;
 
  int button_id;
 
  act_sel_dialog_data =
      act_data(ACTION_ANY, /* Not decided yet */
               actor_unit->id,
               (target_city) ? target_city->id : IDENTITY_NUMBER_ZERO,
               (target_unit) ? target_unit->id : IDENTITY_NUMBER_ZERO,
               (target_tile) ? target_tile->index : TILE_INDEX_NONE,
               /* No target_building or target_tech supplied. (Dec 2019) */
               B_LAST, A_UNSET,
               target_extra ? target_extra->id : EXTRA_NONE);
 
  /* Could be caused by the server failing to reply to a request for more
   * information or a bug in the client code. */
  fc_assert_msg(!is_more_user_input_needed,
                "Diplomat queue problem. Is another diplomat window open?");
 
  /* No extra input is required as no action has been chosen yet. */
  is_more_user_input_needed = FALSE;
 
  /* No buttons are added yet. */
  for (button_id = 0; button_id < BUTTON_COUNT; button_id++) {
    action_button_map[button_id] = BUTTON_NOT_THERE;
  }
 
  actor_homecity = game_city_by_number(actor_unit->homecity);
 
  actor_unit_id = actor_unit->id;
  target_ids[ATK_SELF] = actor_unit_id;
  target_ids[ATK_CITY] = target_city ?
                         target_city->id :
                         IDENTITY_NUMBER_ZERO;
  target_ids[ATK_UNIT] = target_unit ?
                         target_unit->id :
                         IDENTITY_NUMBER_ZERO;
  target_ids[ATK_STACK] = target_tile ?
                          tile_index(target_tile) :
                          TILE_INDEX_NONE;
  target_ids[ATK_TILE] = target_tile ?
                         tile_index(target_tile) :
                         TILE_INDEX_NONE;
  target_ids[ATK_EXTRAS] = target_tile ?
                           tile_index(target_tile) :
                           TILE_INDEX_NONE;
  target_extra_id      = target_extra ?
                         extra_number(target_extra) :
                         EXTRA_NONE;
 
  astr_set(&title,
           /* TRANS: %s is a unit name, e.g., Spy */
           _("Choose Your %s's Strategy"),
           unit_name_translation(actor_unit));
 
  if (target_city && actor_homecity) {
    astr_set(&text,
             _("Your %s from %s reaches the city of %s.\nWhat now?"),
             unit_name_translation(actor_unit),
             city_name_get(actor_homecity),
             city_name_get(target_city));
  } else if (target_city) {
    astr_set(&text,
             _("Your %s has arrived at %s.\nWhat is your command?"),
             unit_name_translation(actor_unit),
             city_name_get(target_city));
  } else if (target_unit) {
    astr_set(&text,
             /* TRANS: Your Spy is ready to act against Roman Freight. */
             _("Your %s is ready to act against %s %s."),
             unit_name_translation(actor_unit),
             nation_adjective_for_player(unit_owner(target_unit)),
             unit_name_translation(target_unit));
  } else {
    fc_assert_msg(target_unit || target_city || target_tile,
                  "No target specified.");
    astr_set(&text,
             /* TRANS: %s is a unit name, e.g., Diplomat, Spy */
             _("Your %s is waiting for your command."),
             unit_name_translation(actor_unit));
  }
 
  shl = choice_dialog_start(GTK_WINDOW(toplevel), astr_str(&title),
                            astr_str(&text));
 
  /* Unit acting against a city */
 
  action_iterate(act) {
    if (action_id_get_actor_kind(act) == AAK_UNIT
        && action_id_get_target_kind(act) == ATK_CITY) {
      action_entry(shl, act, act_probs,
                   get_act_sel_action_custom_text(action_by_number(act),
                                                  act_probs[act],
                                                  actor_unit,
                                                  target_city),
                   act);
    }
  } action_iterate_end;
 
  /* Unit acting against another unit */
 
  action_iterate(act) {
    if (action_id_get_actor_kind(act) == AAK_UNIT
        && action_id_get_target_kind(act) == ATK_UNIT) {
      action_entry(shl, act, act_probs,
                   get_act_sel_action_custom_text(action_by_number(act),
                                                  act_probs[act],
                                                  actor_unit,
                                                  target_city),
                   act);
    }
  } action_iterate_end;
 
  /* Unit acting against all units at a tile */
 
  action_iterate(act) {
    if (action_id_get_actor_kind(act) == AAK_UNIT
        && action_id_get_target_kind(act) == ATK_STACK) {
      action_entry(shl, act, act_probs,
                   get_act_sel_action_custom_text(action_by_number(act),
                                                  act_probs[act],
                                                  actor_unit,
                                                  target_city),
                   act);
    }
  } action_iterate_end;
 
  /* Unit acting against a tile */
 
  action_iterate(act) {
    if (action_id_get_actor_kind(act) == AAK_UNIT
        && action_id_get_target_kind(act) == ATK_TILE) {
      action_entry(shl, act, act_probs,
                   get_act_sel_action_custom_text(action_by_number(act),
                                                  act_probs[act],
                                                  actor_unit,
                                                  target_city),
                   act);
    }
  } action_iterate_end;
 
  /* Unit acting against a tile's extras */
 
  action_iterate(act) {
    if (action_id_get_actor_kind(act) == AAK_UNIT
        && action_id_get_target_kind(act) == ATK_EXTRAS) {
      action_entry(shl, act, act_probs,
                   get_act_sel_action_custom_text(action_by_number(act),
                                                  act_probs[act],
                                                  actor_unit,
                                                  target_city),
                   act);
    }
  } action_iterate_end;
 
  /* Unit acting against itself. */
 
  action_iterate(act) {
    if (action_id_get_actor_kind(act) == AAK_UNIT
        && action_id_get_target_kind(act) == ATK_SELF) {
      action_entry(shl, act, act_probs,
                   get_act_sel_action_custom_text(action_by_number(act),
                                                  act_probs[act],
                                                  actor_unit,
                                                  target_city),
                   act);
    }
  } action_iterate_end;
 
  if (target_unit != NULL
      && unit_list_size(target_tile->units) > 1) {
    action_button_map[BUTTON_NEW_UNIT_TGT] =
        choice_dialog_get_number_of_buttons(shl);
    choice_dialog_add(shl, _("Change unit target"),
                      (GCallback)act_sel_new_unit_tgt_callback,
                      GINT_TO_POINTER(ACTION_NONE), TRUE, NULL);
  }
 
  if (target_extra != NULL) {
    action_button_map[BUTTON_NEW_EXTRA_TGT] =
        choice_dialog_get_number_of_buttons(shl);
    choice_dialog_add(shl, _("Change extra target"),
                      (GCallback)act_sel_new_extra_tgt_callback,
                      GINT_TO_POINTER(ACTION_NONE), TRUE, NULL);
  }
 
  action_button_map[BUTTON_LOCATION] =
      choice_dialog_get_number_of_buttons(shl);
  choice_dialog_add(shl, _("Show Location"),
                    (GCallback)act_sel_location_callback,
                    GINT_TO_POINTER(ACTION_NONE),
                    TRUE, NULL);
 
  action_button_map[BUTTON_WAIT] =
      choice_dialog_get_number_of_buttons(shl);
  choice_dialog_add(shl, _("_Wait"),
                    (GCallback)act_sel_wait_callback,
                    GINT_TO_POINTER(ACTION_NONE),
                    TRUE, NULL);
 
  action_button_map[BUTTON_CANCEL] =
      choice_dialog_get_number_of_buttons(shl);
  choice_dialog_add(shl, _("_Cancel"),
                    (GCallback)act_sel_cancel_callback,
                    GINT_TO_POINTER(ACTION_NONE),
                    FALSE, NULL);
 
  choice_dialog_end(shl);
 
  act_sel_dialog = shl;
 
  choice_dialog_set_hide(shl, TRUE);
  g_signal_connect(shl, "destroy",
                   G_CALLBACK(act_sel_destroy_callback), NULL);
  g_signal_connect(shl, "delete_event",
                   G_CALLBACK(act_sel_close_callback),
                   GINT_TO_POINTER(ACTION_NONE));
 
  /* Give follow up questions access to action probabilities. */
  client_unit_init_act_prob_cache(actor_unit);
  action_iterate(act) {
    actor_unit->client.act_prob_cache[act] = act_probs[act];
  } action_iterate_end;
 
  astr_free(&title);
  astr_free(&text);
}
 
/**********************************************************************/
int action_selection_actor_unit(void)
{
  if (act_sel_dialog == NULL) {
    return IDENTITY_NUMBER_ZERO;
  }
  return actor_unit_id;
}
 
/**********************************************************************/
int action_selection_target_city(void)
{
  if (act_sel_dialog == NULL) {
    return IDENTITY_NUMBER_ZERO;
  }
  return target_ids[ATK_CITY];
}
 
/**********************************************************************/
int action_selection_target_unit(void)
{
  if (act_sel_dialog == NULL) {
    return IDENTITY_NUMBER_ZERO;
  }
 
  return target_ids[ATK_UNIT];
}
 
/**********************************************************************/
int action_selection_target_tile(void)
{
  if (act_sel_dialog == NULL) {
    return TILE_INDEX_NONE;
  }
 
  return target_ids[ATK_TILE];
}
 
/**********************************************************************/
int action_selection_target_extra(void)
{
  if (act_sel_dialog == NULL) {
    return EXTRA_NONE;
  }
 
  return target_extra_id;
}
 
/**********************************************************************/
void action_selection_refresh(struct unit *actor_unit,
                              struct city *target_city,
                              struct unit *target_unit,
                              struct tile *target_tile,
                              struct extra_type *target_extra,
                              const struct act_prob *act_probs)
{
  if (act_sel_dialog == NULL) {
    fc_assert_msg(act_sel_dialog != NULL,
                  "The action selection dialog should have been open");
    return;
  }
 
  if (actor_unit->id != action_selection_actor_unit()) {
    fc_assert_msg(actor_unit->id == action_selection_actor_unit(),
                  "The action selection dialog is for another actor unit.");
    return;
  }
 
  /* A new target may have appeared. */
  if (target_city) {
    act_sel_dialog_data->target_city_id = target_city->id;
  }
  if (target_unit) {
    act_sel_dialog_data->target_unit_id = target_unit->id;
  }
  if (target_tile) {
    act_sel_dialog_data->target_tile_id = target_tile->index;
  }
  /* No target_building or target_tech supplied. (Dec 2019) */
  if (target_extra) {
    act_sel_dialog_data->target_extra_id = target_extra->id;
  }
 
  action_iterate(act) {
    const char *custom;
 
    if (action_id_get_actor_kind(act) != AAK_UNIT) {
      /* Not relevant. */
      continue;
    }
 
    custom = get_act_sel_action_custom_text(action_by_number(act),
                                            act_probs[act],
                                            actor_unit,
                                            target_city);
 
    if (BUTTON_NOT_THERE == action_button_map[act]) {
      /* Add the button (unless its probability is 0). */
      action_entry(act_sel_dialog, act, act_probs, custom, act);
    } else {
      /* Update the existing button. */
      action_entry_update(act_sel_dialog, act, act_probs, custom, act);
    }
  } action_iterate_end;
 
  /* DO NOT change the action_button_map[] for any button to reflect its
   * new position. A button keeps its choice dialog internal name when its
   * position changes. A button's id number is therefore based on when
   * it was added, not on its current position. */
 
  if (BUTTON_NOT_THERE != action_button_map[BUTTON_WAIT]) {
    /* Move the wait button below the recently added button. */
    choice_dialog_button_move_to_the_end(act_sel_dialog,
        action_button_map[BUTTON_WAIT]);
  }
 
  if (BUTTON_NOT_THERE != action_button_map[BUTTON_CANCEL]) {
    /* Move the cancel button below the recently added button. */
    choice_dialog_button_move_to_the_end(act_sel_dialog,
        action_button_map[BUTTON_CANCEL]);
  }
 
  choice_dialog_end(act_sel_dialog);
}
 
/**********************************************************************/
void action_selection_close(void)
{
  if (act_sel_dialog != NULL) {
    did_not_decide = TRUE;
    gtk_widget_destroy(act_sel_dialog);
  }
}