network_gui.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "../stdafx.h"
#include "../strings_func.h"
#include "../date_func.h"
#include "../fios.h"
#include "network_client.h"
#include "network_gui.h"
#include "network_gamelist.h"
#include "network.h"
#include "network_base.h"
#include "network_content.h"
#include "network_server.h"
#include "network_coordinator.h"
#include "../gui.h"
#include "network_udp.h"
#include "../window_func.h"
#include "../gfx_func.h"
#include "../widgets/dropdown_type.h"
#include "../widgets/dropdown_func.h"
#include "../querystring_gui.h"
#include "../sortlist_type.h"
#include "../company_func.h"
#include "../command_func.h"
#include "../core/geometry_func.hpp"
#include "../genworld.h"
#include "../map_type.h"
#include "../guitimer_func.h"
#include "../zoom_func.h"
#include "../sprite.h"
#include "../settings_internal.h"
 
#include "../widgets/network_widget.h"
 
#include "table/strings.h"
#include "../table/sprites.h"
 
#include "../stringfilter_type.h"
 
#ifdef __EMSCRIPTEN__
# include <emscripten.h>
#endif
 
#include <map>
 
#include "../safeguards.h"
 
static void ShowNetworkStartServerWindow();
 
static const int NETWORK_LIST_REFRESH_DELAY = 30; 
 
static ClientID _admin_client_id = INVALID_CLIENT_ID; 
static CompanyID _admin_company_id = INVALID_COMPANY; 
 
void UpdateNetworkGameWindow()
{
  InvalidateWindowData(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME, 0);
}
 
static DropDownList BuildVisibilityDropDownList()
{
  DropDownList list;
 
  list.emplace_back(new DropDownListStringItem(STR_NETWORK_SERVER_VISIBILITY_LOCAL, SERVER_GAME_TYPE_LOCAL, false));
  list.emplace_back(new DropDownListStringItem(STR_NETWORK_SERVER_VISIBILITY_INVITE_ONLY, SERVER_GAME_TYPE_INVITE_ONLY, false));
  list.emplace_back(new DropDownListStringItem(STR_NETWORK_SERVER_VISIBILITY_PUBLIC, SERVER_GAME_TYPE_PUBLIC, false));
 
  return list;
}
 
typedef GUIList<NetworkGameList*, StringFilter&> GUIGameServerList;
typedef int ServerListPosition;
static const ServerListPosition SLP_INVALID = -1;
 
class NWidgetServerListHeader : public NWidgetContainer {
  static const uint MINIMUM_NAME_WIDTH_BEFORE_NEW_HEADER = 150; 
  bool visible[6]; 
public:
  NWidgetServerListHeader() : NWidgetContainer(NWID_HORIZONTAL)
  {
    NWidgetLeaf *leaf = new NWidgetLeaf(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_NAME, STR_NETWORK_SERVER_LIST_GAME_NAME, STR_NETWORK_SERVER_LIST_GAME_NAME_TOOLTIP);
    leaf->SetResize(1, 0);
    leaf->SetFill(1, 0);
    this->Add(leaf);
 
    this->Add(new NWidgetLeaf(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_CLIENTS, STR_NETWORK_SERVER_LIST_CLIENTS_CAPTION, STR_NETWORK_SERVER_LIST_CLIENTS_CAPTION_TOOLTIP));
    this->Add(new NWidgetLeaf(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_MAPSIZE, STR_NETWORK_SERVER_LIST_MAP_SIZE_CAPTION, STR_NETWORK_SERVER_LIST_MAP_SIZE_CAPTION_TOOLTIP));
    this->Add(new NWidgetLeaf(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_DATE, STR_NETWORK_SERVER_LIST_DATE_CAPTION, STR_NETWORK_SERVER_LIST_DATE_CAPTION_TOOLTIP));
    this->Add(new NWidgetLeaf(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_YEARS, STR_NETWORK_SERVER_LIST_YEARS_CAPTION, STR_NETWORK_SERVER_LIST_YEARS_CAPTION_TOOLTIP));
 
    leaf = new NWidgetLeaf(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_INFO, STR_EMPTY, STR_NETWORK_SERVER_LIST_INFO_ICONS_TOOLTIP);
    leaf->SetMinimalSize(14 + GetSpriteSize(SPR_LOCK, nullptr, ZOOM_LVL_OUT_4X).width
                            + GetSpriteSize(SPR_BLOT, nullptr, ZOOM_LVL_OUT_4X).width
                            + GetSpriteSize(SPR_FLAGS_BASE, nullptr, ZOOM_LVL_OUT_4X).width, 12);
    leaf->SetFill(0, 1);
    this->Add(leaf);
 
    /* First and last are always visible, the rest is implicitly zeroed */
    this->visible[0] = true;
    *lastof(this->visible) = true;
  }
 
  void SetupSmallestSize(Window *w, bool init_array) override
  {
    /* Oh yeah, we ought to be findable! */
    w->nested_array[WID_NG_HEADER] = this;
 
    this->smallest_y = 0; // Biggest child.
    this->fill_x = 1;
    this->fill_y = 0;
    this->resize_x = 1; // We only resize in this direction
    this->resize_y = 0; // We never resize in this direction
 
    /* First initialise some variables... */
    for (NWidgetBase *child_wid = this->head; child_wid != nullptr; child_wid = child_wid->next) {
      child_wid->SetupSmallestSize(w, init_array);
      this->smallest_y = std::max(this->smallest_y, child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom);
    }
 
    /* ... then in a second pass make sure the 'current' sizes are set. Won't change for most widgets. */
    for (NWidgetBase *child_wid = this->head; child_wid != nullptr; child_wid = child_wid->next) {
      child_wid->current_x = child_wid->smallest_x;
      child_wid->current_y = this->smallest_y;
    }
 
    this->smallest_x = this->head->smallest_x + this->tail->smallest_x; // First and last are always shown, rest not
  }
 
  void AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl) override
  {
    assert(given_width >= this->smallest_x && given_height >= this->smallest_y);
 
    this->pos_x = x;
    this->pos_y = y;
    this->current_x = given_width;
    this->current_y = given_height;
 
    given_width -= this->tail->smallest_x;
    NWidgetBase *child_wid = this->head->next;
    /* The first and last widget are always visible, determine which other should be visible */
    for (uint i = 1; i < lengthof(this->visible) - 1; i++) {
      if (given_width > MINIMUM_NAME_WIDTH_BEFORE_NEW_HEADER + child_wid->smallest_x && this->visible[i - 1]) {
        this->visible[i] = true;
        given_width -= child_wid->smallest_x;
      } else {
        this->visible[i] = false;
      }
      child_wid = child_wid->next;
    }
 
    /* All remaining space goes to the first (name) widget */
    this->head->current_x = given_width;
 
    /* Now assign the widgets to their rightful place */
    uint position = 0; // Place to put next child relative to origin of the container.
    uint i = rtl ? lengthof(this->visible) - 1 : 0;
    child_wid = rtl ? this->tail : this->head;
    while (child_wid != nullptr) {
      if (this->visible[i]) {
        child_wid->AssignSizePosition(sizing, x + position, y, child_wid->current_x, this->current_y, rtl);
        position += child_wid->current_x;
      }
 
      child_wid = rtl ? child_wid->prev : child_wid->next;
      i += rtl ? -1 : 1;
    }
  }
 
  void Draw(const Window *w) override
  {
    int i = 0;
    for (NWidgetBase *child_wid = this->head; child_wid != nullptr; child_wid = child_wid->next) {
      if (!this->visible[i++]) continue;
 
      child_wid->Draw(w);
    }
  }
 
  NWidgetCore *GetWidgetFromPos(int x, int y) override
  {
    if (!IsInsideBS(x, this->pos_x, this->current_x) || !IsInsideBS(y, this->pos_y, this->current_y)) return nullptr;
 
    int i = 0;
    for (NWidgetBase *child_wid = this->head; child_wid != nullptr; child_wid = child_wid->next) {
      if (!this->visible[i++]) continue;
      NWidgetCore *nwid = child_wid->GetWidgetFromPos(x, y);
      if (nwid != nullptr) return nwid;
    }
    return nullptr;
  }
 
  bool IsWidgetVisible(NetworkGameWidgets widget) const
  {
    assert((uint)(widget - WID_NG_NAME) < lengthof(this->visible));
    return this->visible[widget - WID_NG_NAME];
  }
};
 
class NetworkGameWindow : public Window {
protected:
  /* Runtime saved values */
  static Listing last_sorting;
 
  /* Constants for sorting servers */
  static GUIGameServerList::SortFunction * const sorter_funcs[];
  static GUIGameServerList::FilterFunction * const filter_funcs[];
 
  NetworkGameList *server;        
  NetworkGameList *last_joined;   
  GUIGameServerList servers;      
  ServerListPosition list_pos;    
  Scrollbar *vscroll;             
  QueryString name_editbox;       
  QueryString filter_editbox;     
  GUITimer requery_timer;         
  bool searched_internet = false; 
 
  int lock_offset; 
  int blot_offset; 
  int flag_offset; 
 
  void BuildGUINetworkGameList()
  {
    if (!this->servers.NeedRebuild()) return;
 
    /* Create temporary array of games to use for listing */
    this->servers.clear();
 
    bool found_current_server = false;
    bool found_last_joined = false;
    for (NetworkGameList *ngl = _network_game_list; ngl != nullptr; ngl = ngl->next) {
      this->servers.push_back(ngl);
      if (ngl == this->server) {
        found_current_server = true;
      }
      if (ngl == this->last_joined) {
        found_last_joined = true;
      }
    }
    /* A refresh can cause the current server to be delete; so unselect. */
    if (!found_last_joined) {
      this->last_joined = nullptr;
    }
    if (!found_current_server) {
      this->server = nullptr;
      this->list_pos = SLP_INVALID;
    }
 
    /* Apply the filter condition immediately, if a search string has been provided. */
    StringFilter sf;
    sf.SetFilterTerm(this->filter_editbox.text.buf);
 
    if (!sf.IsEmpty()) {
      this->servers.SetFilterState(true);
      this->servers.Filter(sf);
    } else {
      this->servers.SetFilterState(false);
    }
 
    this->servers.shrink_to_fit();
    this->servers.RebuildDone();
    this->vscroll->SetCount((int)this->servers.size());
 
    /* Sort the list of network games as requested. */
    this->servers.Sort();
    this->UpdateListPos();
  }
 
  static bool NGameNameSorter(NetworkGameList * const &a, NetworkGameList * const &b)
  {
    int r = strnatcmp(a->info.server_name.c_str(), b->info.server_name.c_str(), true); // Sort by name (natural sorting).
    if (r == 0) r = a->connection_string.compare(b->connection_string);
 
    return r < 0;
  }
 
  static bool NGameClientSorter(NetworkGameList * const &a, NetworkGameList * const &b)
  {
    /* Reverse as per default we are interested in most-clients first */
    int r = a->info.clients_on - b->info.clients_on;
 
    if (r == 0) r = a->info.clients_max - b->info.clients_max;
    if (r == 0) return NGameNameSorter(a, b);
 
    return r < 0;
  }
 
  static bool NGameMapSizeSorter(NetworkGameList * const &a, NetworkGameList * const &b)
  {
    /* Sort by the area of the map. */
    int r = (a->info.map_height) * (a->info.map_width) - (b->info.map_height) * (b->info.map_width);
 
    if (r == 0) r = a->info.map_width - b->info.map_width;
    return (r != 0) ? r < 0 : NGameClientSorter(a, b);
  }
 
  static bool NGameDateSorter(NetworkGameList * const &a, NetworkGameList * const &b)
  {
    int r = a->info.game_date - b->info.game_date;
    return (r != 0) ? r < 0 : NGameClientSorter(a, b);
  }
 
  static bool NGameYearsSorter(NetworkGameList * const &a, NetworkGameList * const &b)
  {
    int r = a->info.game_date - a->info.start_date - b->info.game_date + b->info.start_date;
    return (r != 0) ? r < 0: NGameDateSorter(a, b);
  }
 
  static bool NGameAllowedSorter(NetworkGameList * const &a, NetworkGameList * const &b)
  {
    /* The servers we do not know anything about (the ones that did not reply) should be at the bottom) */
    int r = a->info.server_revision.empty() - b->info.server_revision.empty();
 
    /* Reverse default as we are interested in version-compatible clients first */
    if (r == 0) r = b->info.version_compatible - a->info.version_compatible;
    /* The version-compatible ones are then sorted with NewGRF compatible first, incompatible last */
    if (r == 0) r = b->info.compatible - a->info.compatible;
    /* Passworded servers should be below unpassworded servers */
    if (r == 0) r = a->info.use_password - b->info.use_password;
 
    /* Finally sort on the number of clients of the server in reverse order. */
    return (r != 0) ? r < 0 : NGameClientSorter(b, a);
  }
 
  void SortNetworkGameList()
  {
    if (this->servers.Sort()) this->UpdateListPos();
  }
 
  void UpdateListPos()
  {
    this->list_pos = SLP_INVALID;
    for (uint i = 0; i != this->servers.size(); i++) {
      if (this->servers[i] == this->server) {
        this->list_pos = i;
        break;
      }
    }
  }
 
  static bool CDECL NGameSearchFilter(NetworkGameList * const *item, StringFilter &sf)
  {
    assert(item != nullptr);
    assert((*item) != nullptr);
 
    sf.ResetState();
    sf.AddLine((*item)->info.server_name.c_str());
    return sf.GetState();
  }
 
  void DrawServerLine(const NetworkGameList *cur_item, uint y, bool highlight) const
  {
    const NWidgetBase *nwi_name = this->GetWidget<NWidgetBase>(WID_NG_NAME);
    const NWidgetBase *nwi_info = this->GetWidget<NWidgetBase>(WID_NG_INFO);
 
    /* show highlighted item with a different colour */
    if (highlight) GfxFillRect(nwi_name->pos_x + 1, y + 1, nwi_info->pos_x + nwi_info->current_x - 2, y + this->resize.step_height - 2, PC_GREY);
 
    /* offsets to vertically centre text and icons */
    int text_y_offset = (this->resize.step_height - FONT_HEIGHT_NORMAL) / 2 + 1;
    int icon_y_offset = (this->resize.step_height - GetSpriteSize(SPR_BLOT).height) / 2;
    int lock_y_offset = (this->resize.step_height - GetSpriteSize(SPR_LOCK).height) / 2;
 
    DrawString(nwi_name->pos_x + WD_FRAMERECT_LEFT, nwi_name->pos_x + nwi_name->current_x - WD_FRAMERECT_RIGHT, y + text_y_offset, cur_item->info.server_name, TC_BLACK);
 
    /* only draw details if the server is online */
    if (cur_item->status == NGLS_ONLINE) {
      const NWidgetServerListHeader *nwi_header = this->GetWidget<NWidgetServerListHeader>(WID_NG_HEADER);
 
      if (nwi_header->IsWidgetVisible(WID_NG_CLIENTS)) {
        const NWidgetBase *nwi_clients = this->GetWidget<NWidgetBase>(WID_NG_CLIENTS);
        SetDParam(0, cur_item->info.clients_on);
        SetDParam(1, cur_item->info.clients_max);
        SetDParam(2, cur_item->info.companies_on);
        SetDParam(3, cur_item->info.companies_max);
        DrawString(nwi_clients->pos_x, nwi_clients->pos_x + nwi_clients->current_x - 1, y + text_y_offset, STR_NETWORK_SERVER_LIST_GENERAL_ONLINE, TC_FROMSTRING, SA_HOR_CENTER);
      }
 
      if (nwi_header->IsWidgetVisible(WID_NG_MAPSIZE)) {
        /* map size */
        const NWidgetBase *nwi_mapsize = this->GetWidget<NWidgetBase>(WID_NG_MAPSIZE);
        SetDParam(0, cur_item->info.map_width);
        SetDParam(1, cur_item->info.map_height);
        DrawString(nwi_mapsize->pos_x, nwi_mapsize->pos_x + nwi_mapsize->current_x - 1, y + text_y_offset, STR_NETWORK_SERVER_LIST_MAP_SIZE_SHORT, TC_FROMSTRING, SA_HOR_CENTER);
      }
 
      if (nwi_header->IsWidgetVisible(WID_NG_DATE)) {
        /* current date */
        const NWidgetBase *nwi_date = this->GetWidget<NWidgetBase>(WID_NG_DATE);
        YearMonthDay ymd;
        ConvertDateToYMD(cur_item->info.game_date, &ymd);
        SetDParam(0, ymd.year);
        DrawString(nwi_date->pos_x, nwi_date->pos_x + nwi_date->current_x - 1, y + text_y_offset, STR_JUST_INT, TC_BLACK, SA_HOR_CENTER);
      }
 
      if (nwi_header->IsWidgetVisible(WID_NG_YEARS)) {
        /* number of years the game is running */
        const NWidgetBase *nwi_years = this->GetWidget<NWidgetBase>(WID_NG_YEARS);
        YearMonthDay ymd_cur, ymd_start;
        ConvertDateToYMD(cur_item->info.game_date, &ymd_cur);
        ConvertDateToYMD(cur_item->info.start_date, &ymd_start);
        SetDParam(0, ymd_cur.year - ymd_start.year);
        DrawString(nwi_years->pos_x, nwi_years->pos_x + nwi_years->current_x - 1, y + text_y_offset, STR_JUST_INT, TC_BLACK, SA_HOR_CENTER);
      }
 
      /* draw a lock if the server is password protected */
      if (cur_item->info.use_password) DrawSprite(SPR_LOCK, PAL_NONE, nwi_info->pos_x + this->lock_offset, y + lock_y_offset);
 
      /* draw red or green icon, depending on compatibility with server */
      DrawSprite(SPR_BLOT, (cur_item->info.compatible ? PALETTE_TO_GREEN : (cur_item->info.version_compatible ? PALETTE_TO_YELLOW : PALETTE_TO_RED)), nwi_info->pos_x + this->blot_offset, y + icon_y_offset + 1);
    }
  }
 
  void ScrollToSelectedServer()
  {
    if (this->list_pos == SLP_INVALID) return; // no server selected
    this->vscroll->ScrollTowards(this->list_pos);
  }
 
public:
  NetworkGameWindow(WindowDesc *desc) : Window(desc), name_editbox(NETWORK_CLIENT_NAME_LENGTH), filter_editbox(120)
  {
    this->list_pos = SLP_INVALID;
    this->server = nullptr;
 
    this->lock_offset = 5;
    this->blot_offset = this->lock_offset + 3 + GetSpriteSize(SPR_LOCK).width;
    this->flag_offset = this->blot_offset + 2 + GetSpriteSize(SPR_BLOT).width;
 
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_NG_SCROLLBAR);
    this->FinishInitNested(WN_NETWORK_WINDOW_GAME);
 
    this->querystrings[WID_NG_CLIENT] = &this->name_editbox;
    this->name_editbox.text.Assign(_settings_client.network.client_name.c_str());
 
    this->querystrings[WID_NG_FILTER] = &this->filter_editbox;
    this->filter_editbox.cancel_button = QueryString::ACTION_CLEAR;
    this->SetFocusedWidget(WID_NG_FILTER);
 
    /* As the Game Coordinator doesn't support "websocket" servers yet, we
     * let "os/emscripten/pre.js" hardcode a list of servers people can
     * join. This means the serverlist is curated for now, but it is the
     * best we can offer. */
#ifdef __EMSCRIPTEN__
    EM_ASM(if (window["openttd_server_list"]) openttd_server_list());
#endif
 
    this->last_joined = NetworkAddServer(_settings_client.network.last_joined, false);
    this->server = this->last_joined;
 
    this->requery_timer.SetInterval(NETWORK_LIST_REFRESH_DELAY * 1000);
 
    this->servers.SetListing(this->last_sorting);
    this->servers.SetSortFuncs(this->sorter_funcs);
    this->servers.SetFilterFuncs(this->filter_funcs);
    this->servers.ForceRebuild();
  }
 
  ~NetworkGameWindow()
  {
    this->last_sorting = this->servers.GetListing();
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_NG_MATRIX:
        resize->height = WD_MATRIX_TOP + std::max(GetSpriteSize(SPR_BLOT).height, (uint)FONT_HEIGHT_NORMAL) + WD_MATRIX_BOTTOM;
        fill->height = resize->height;
        size->height = 12 * resize->height;
        break;
 
      case WID_NG_LASTJOINED:
        size->height = WD_MATRIX_TOP + std::max(GetSpriteSize(SPR_BLOT).height, (uint)FONT_HEIGHT_NORMAL) + WD_MATRIX_BOTTOM;
        break;
 
      case WID_NG_LASTJOINED_SPACER:
        size->width = NWidgetScrollbar::GetVerticalDimension().width;
        break;
 
      case WID_NG_NAME:
        size->width += 2 * Window::SortButtonWidth(); // Make space for the arrow
        break;
 
      case WID_NG_CLIENTS:
        size->width += 2 * Window::SortButtonWidth(); // Make space for the arrow
        SetDParamMaxValue(0, MAX_CLIENTS);
        SetDParamMaxValue(1, MAX_CLIENTS);
        SetDParamMaxValue(2, MAX_COMPANIES);
        SetDParamMaxValue(3, MAX_COMPANIES);
        *size = maxdim(*size, GetStringBoundingBox(STR_NETWORK_SERVER_LIST_GENERAL_ONLINE));
        break;
 
      case WID_NG_MAPSIZE:
        size->width += 2 * Window::SortButtonWidth(); // Make space for the arrow
        SetDParamMaxValue(0, MAX_MAP_SIZE);
        SetDParamMaxValue(1, MAX_MAP_SIZE);
        *size = maxdim(*size, GetStringBoundingBox(STR_NETWORK_SERVER_LIST_MAP_SIZE_SHORT));
        break;
 
      case WID_NG_DATE:
      case WID_NG_YEARS:
        size->width += 2 * Window::SortButtonWidth(); // Make space for the arrow
        SetDParamMaxValue(0, 5);
        *size = maxdim(*size, GetStringBoundingBox(STR_JUST_INT));
        break;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    switch (widget) {
      case WID_NG_MATRIX: {
        uint16 y = r.top;
 
        const int max = std::min(this->vscroll->GetPosition() + this->vscroll->GetCapacity(), (int)this->servers.size());
 
        for (int i = this->vscroll->GetPosition(); i < max; ++i) {
          const NetworkGameList *ngl = this->servers[i];
          this->DrawServerLine(ngl, y, ngl == this->server);
          y += this->resize.step_height;
        }
        break;
      }
 
      case WID_NG_LASTJOINED:
        /* Draw the last joined server, if any */
        if (this->last_joined != nullptr) this->DrawServerLine(this->last_joined, r.top, this->last_joined == this->server);
        break;
 
      case WID_NG_DETAILS:
        this->DrawDetails(r);
        break;
 
      case WID_NG_NAME:
      case WID_NG_CLIENTS:
      case WID_NG_MAPSIZE:
      case WID_NG_DATE:
      case WID_NG_YEARS:
      case WID_NG_INFO:
        if (widget - WID_NG_NAME == this->servers.SortType()) this->DrawSortButtonState(widget, this->servers.IsDescSortOrder() ? SBS_DOWN : SBS_UP);
        break;
    }
  }
 
 
  void OnPaint() override
  {
    if (this->servers.NeedRebuild()) {
      this->BuildGUINetworkGameList();
    }
    if (this->servers.NeedResort()) {
      this->SortNetworkGameList();
    }
 
    NetworkGameList *sel = this->server;
    /* 'Refresh' button invisible if no server selected */
    this->SetWidgetDisabledState(WID_NG_REFRESH, sel == nullptr);
    /* 'Join' button disabling conditions */
    this->SetWidgetDisabledState(WID_NG_JOIN, sel == nullptr || // no Selected Server
        sel->status != NGLS_ONLINE || // Server offline
        sel->info.clients_on >= sel->info.clients_max || // Server full
        !sel->info.compatible); // Revision mismatch
 
    this->SetWidgetLoweredState(WID_NG_REFRESH, sel != nullptr && sel->refreshing);
 
    /* 'NewGRF Settings' button invisible if no NewGRF is used */
    this->GetWidget<NWidgetStacked>(WID_NG_NEWGRF_SEL)->SetDisplayedPlane(sel == nullptr || sel->status != NGLS_ONLINE || sel->info.grfconfig == nullptr);
    this->GetWidget<NWidgetStacked>(WID_NG_NEWGRF_MISSING_SEL)->SetDisplayedPlane(sel == nullptr || sel->status != NGLS_ONLINE || sel->info.grfconfig == nullptr || !sel->info.version_compatible || sel->info.compatible);
 
#ifdef __EMSCRIPTEN__
    this->SetWidgetDisabledState(WID_NG_SEARCH_INTERNET, true);
    this->SetWidgetDisabledState(WID_NG_SEARCH_LAN, true);
    this->SetWidgetDisabledState(WID_NG_ADD, true);
    this->SetWidgetDisabledState(WID_NG_START, true);
#endif
 
    this->DrawWidgets();
  }
 
  void DrawDetails(const Rect &r) const
  {
    NetworkGameList *sel = this->server;
 
    const int detail_height = 6 + 8 + 6 + 3 * FONT_HEIGHT_NORMAL;
 
    /* Draw the right menu */
    GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.top + detail_height - 1, PC_DARK_BLUE);
    if (sel == nullptr) {
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, r.top + 6 + 4 + FONT_HEIGHT_NORMAL, STR_NETWORK_SERVER_LIST_GAME_INFO, TC_FROMSTRING, SA_HOR_CENTER);
    } else if (sel->status != NGLS_ONLINE) {
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, r.top + 6 + 4 + FONT_HEIGHT_NORMAL, sel->info.server_name, TC_ORANGE, SA_HOR_CENTER); // game name
 
      StringID message = INVALID_STRING_ID;
      switch (sel->status) {
        case NGLS_OFFLINE: message = STR_NETWORK_SERVER_LIST_SERVER_OFFLINE; break;
        case NGLS_FULL: message = STR_NETWORK_SERVER_LIST_SERVER_FULL; break;
        case NGLS_BANNED: message = STR_NETWORK_SERVER_LIST_SERVER_BANNED; break;
        case NGLS_TOO_OLD: message = STR_NETWORK_SERVER_LIST_SERVER_TOO_OLD; break;
 
        /* Handled by the if-case above. */
        case NGLS_ONLINE: NOT_REACHED();
      }
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, r.top + detail_height + 4, message, TC_FROMSTRING, SA_HOR_CENTER); // server offline
    } else { // show game info
 
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, r.top + 6, STR_NETWORK_SERVER_LIST_GAME_INFO, TC_FROMSTRING, SA_HOR_CENTER);
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, r.top + 6 + 4 + FONT_HEIGHT_NORMAL, sel->info.server_name, TC_ORANGE, SA_HOR_CENTER); // game name
 
      uint16 y = r.top + detail_height + 4;
 
      SetDParam(0, sel->info.clients_on);
      SetDParam(1, sel->info.clients_max);
      SetDParam(2, sel->info.companies_on);
      SetDParam(3, sel->info.companies_max);
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_NETWORK_SERVER_LIST_CLIENTS);
      y += FONT_HEIGHT_NORMAL;
 
      SetDParam(0, STR_CHEAT_SWITCH_CLIMATE_TEMPERATE_LANDSCAPE + sel->info.landscape);
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_NETWORK_SERVER_LIST_LANDSCAPE); // landscape
      y += FONT_HEIGHT_NORMAL;
 
      SetDParam(0, sel->info.map_width);
      SetDParam(1, sel->info.map_height);
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_NETWORK_SERVER_LIST_MAP_SIZE); // map size
      y += FONT_HEIGHT_NORMAL;
 
      SetDParamStr(0, sel->info.server_revision);
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_NETWORK_SERVER_LIST_SERVER_VERSION); // server version
      y += FONT_HEIGHT_NORMAL;
 
      SetDParamStr(0, sel->connection_string);
      StringID invite_or_address = StrStartsWith(sel->connection_string, "+") ? STR_NETWORK_SERVER_LIST_INVITE_CODE : STR_NETWORK_SERVER_LIST_SERVER_ADDRESS;
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, invite_or_address); // server address / invite code
      y += FONT_HEIGHT_NORMAL;
 
      SetDParam(0, sel->info.start_date);
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_NETWORK_SERVER_LIST_START_DATE); // start date
      y += FONT_HEIGHT_NORMAL;
 
      SetDParam(0, sel->info.game_date);
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_NETWORK_SERVER_LIST_CURRENT_DATE); // current date
      y += FONT_HEIGHT_NORMAL;
 
      if (sel->info.gamescript_version != -1) {
        SetDParamStr(0, sel->info.gamescript_name);
        SetDParam(1, sel->info.gamescript_version);
        DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_NETWORK_SERVER_LIST_GAMESCRIPT); // gamescript name and version
        y += FONT_HEIGHT_NORMAL;
      }
 
      y += WD_PAR_VSEP_NORMAL;
 
      if (!sel->info.compatible) {
        DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, sel->info.version_compatible ? STR_NETWORK_SERVER_LIST_GRF_MISMATCH : STR_NETWORK_SERVER_LIST_VERSION_MISMATCH, TC_FROMSTRING, SA_HOR_CENTER); // server mismatch
      } else if (sel->info.clients_on == sel->info.clients_max) {
        /* Show: server full, when clients_on == max_clients */
        DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_NETWORK_SERVER_LIST_SERVER_FULL, TC_FROMSTRING, SA_HOR_CENTER); // server full
      } else if (sel->info.use_password) {
        DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_NETWORK_SERVER_LIST_PASSWORD, TC_FROMSTRING, SA_HOR_CENTER); // password warning
      }
    }
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_NG_CANCEL: // Cancel button
        CloseWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME);
        break;
 
      case WID_NG_NAME:    // Sort by name
      case WID_NG_CLIENTS: // Sort by connected clients
      case WID_NG_MAPSIZE: // Sort by map size
      case WID_NG_DATE:    // Sort by date
      case WID_NG_YEARS:   // Sort by years
      case WID_NG_INFO:    // Connectivity (green dot)
        if (this->servers.SortType() == widget - WID_NG_NAME) {
          this->servers.ToggleSortOrder();
          if (this->list_pos != SLP_INVALID) this->list_pos = (ServerListPosition)this->servers.size() - this->list_pos - 1;
        } else {
          this->servers.SetSortType(widget - WID_NG_NAME);
          this->servers.ForceResort();
          this->SortNetworkGameList();
        }
        this->ScrollToSelectedServer();
        this->SetDirty();
        break;
 
      case WID_NG_MATRIX: { // Show available network games
        uint id_v = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_NG_MATRIX);
        this->server = (id_v < this->servers.size()) ? this->servers[id_v] : nullptr;
        this->list_pos = (server == nullptr) ? SLP_INVALID : id_v;
        this->SetDirty();
 
        /* FIXME the disabling should go into some InvalidateData, which is called instead of the SetDirty */
        if (click_count > 1 && !this->IsWidgetDisabled(WID_NG_JOIN)) this->OnClick(pt, WID_NG_JOIN, 1);
        break;
      }
 
      case WID_NG_LASTJOINED: {
        if (this->last_joined != nullptr) {
          this->server = this->last_joined;
 
          /* search the position of the newly selected server */
          this->UpdateListPos();
          this->ScrollToSelectedServer();
          this->SetDirty();
 
          /* FIXME the disabling should go into some InvalidateData, which is called instead of the SetDirty */
          if (click_count > 1 && !this->IsWidgetDisabled(WID_NG_JOIN)) this->OnClick(pt, WID_NG_JOIN, 1);
        }
        break;
      }
 
      case WID_NG_SEARCH_INTERNET:
        _network_coordinator_client.GetListing();
        this->searched_internet = true;
        break;
 
      case WID_NG_SEARCH_LAN:
        NetworkUDPSearchGame();
        break;
 
      case WID_NG_ADD: // Add a server
        SetDParamStr(0, _settings_client.network.connect_to_ip);
        ShowQueryString(
          STR_JUST_RAW_STRING,
          STR_NETWORK_SERVER_LIST_ENTER_SERVER_ADDRESS,
          NETWORK_HOSTNAME_PORT_LENGTH,  // maximum number of characters including '\0'
          this, CS_ALPHANUMERAL, QSF_ACCEPT_UNCHANGED);
        break;
 
      case WID_NG_START: // Start server
        ShowNetworkStartServerWindow();
        break;
 
      case WID_NG_JOIN: // Join Game
        if (this->server != nullptr) {
          NetworkClientConnectGame(this->server->connection_string, COMPANY_SPECTATOR);
        }
        break;
 
      case WID_NG_REFRESH: // Refresh
        if (this->server != nullptr && !this->server->refreshing) NetworkQueryServer(this->server->connection_string);
        break;
 
      case WID_NG_NEWGRF: // NewGRF Settings
        if (this->server != nullptr) ShowNewGRFSettings(false, false, false, &this->server->info.grfconfig);
        break;
 
      case WID_NG_NEWGRF_MISSING: // Find missing content online
        if (this->server != nullptr) ShowMissingContentWindow(this->server->info.grfconfig);
        break;
    }
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    this->servers.ForceRebuild();
    this->SetDirty();
  }
 
  EventState OnKeyPress(WChar key, uint16 keycode) override
  {
    EventState state = ES_NOT_HANDLED;
 
    /* handle up, down, pageup, pagedown, home and end */
    if (this->vscroll->UpdateListPositionOnKeyPress(this->list_pos, keycode) == ES_HANDLED) {
      if (this->list_pos == SLP_INVALID) return ES_HANDLED;
 
      this->server = this->servers[this->list_pos];
 
      /* Scroll to the new server if it is outside the current range. */
      this->ScrollToSelectedServer();
 
      /* redraw window */
      this->SetDirty();
      return ES_HANDLED;
    }
 
    if (this->server != nullptr) {
      if (keycode == WKC_DELETE) { // Press 'delete' to remove servers
        NetworkGameListRemoveItem(this->server);
        if (this->server == this->last_joined) this->last_joined = nullptr;
        this->server = nullptr;
        this->list_pos = SLP_INVALID;
      }
    }
 
    return state;
  }
 
  void OnEditboxChanged(int wid) override
  {
    switch (wid) {
      case WID_NG_FILTER: {
        this->servers.ForceRebuild();
        this->BuildGUINetworkGameList();
        this->ScrollToSelectedServer();
        this->SetDirty();
        break;
      }
 
      case WID_NG_CLIENT:
        /* Validation of the name will happen once the user tries to join or start a game, as getting
         * error messages while typing (e.g. when you clear the name) defeats the purpose of the check. */
        _settings_client.network.client_name = this->name_editbox.text.buf;
        break;
    }
  }
 
  void OnQueryTextFinished(char *str) override
  {
    if (!StrEmpty(str)) {
      _settings_client.network.connect_to_ip = str;
      NetworkAddServer(str);
      NetworkRebuildHostList();
    }
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_NG_MATRIX);
  }
 
  void OnRealtimeTick(uint delta_ms) override
  {
    if (!this->searched_internet) return;
    if (!this->requery_timer.Elapsed(delta_ms)) return;
    this->requery_timer.SetInterval(NETWORK_LIST_REFRESH_DELAY * 1000);
 
    _network_coordinator_client.GetListing();
  }
};
 
Listing NetworkGameWindow::last_sorting = {false, 5};
GUIGameServerList::SortFunction * const NetworkGameWindow::sorter_funcs[] = {
  &NGameNameSorter,
  &NGameClientSorter,
  &NGameMapSizeSorter,
  &NGameDateSorter,
  &NGameYearsSorter,
  &NGameAllowedSorter
};
 
GUIGameServerList::FilterFunction * const NetworkGameWindow::filter_funcs[] = {
  &NGameSearchFilter
};
 
static NWidgetBase *MakeResizableHeader(int *biggest_index)
{
  *biggest_index = std::max<int>(*biggest_index, WID_NG_INFO);
  return new NWidgetServerListHeader();
}
 
static const NWidgetPart _nested_network_game_widgets[] = {
  /* TOP */
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_LIGHT_BLUE),
    NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetDataTip(STR_NETWORK_SERVER_LIST_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_DEFSIZEBOX, COLOUR_LIGHT_BLUE),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, WID_NG_MAIN),
    NWidget(NWID_VERTICAL), SetPIP(10, 7, 0),
      NWidget(NWID_HORIZONTAL), SetPIP(10, 7, 10),
        /* LEFT SIDE */
        NWidget(NWID_VERTICAL), SetPIP(0, 7, 0),
          NWidget(NWID_HORIZONTAL), SetPIP(0, 7, 0),
            NWidget(WWT_TEXT, COLOUR_LIGHT_BLUE, WID_NG_FILTER_LABEL), SetDataTip(STR_LIST_FILTER_TITLE, STR_NULL),
            NWidget(WWT_EDITBOX, COLOUR_LIGHT_BLUE, WID_NG_FILTER), SetMinimalSize(251, 12), SetFill(1, 0), SetResize(1, 0),
                      SetDataTip(STR_LIST_FILTER_OSKTITLE, STR_LIST_FILTER_TOOLTIP),
          EndContainer(),
          NWidget(NWID_HORIZONTAL),
            NWidget(NWID_VERTICAL),
              NWidgetFunction(MakeResizableHeader),
              NWidget(WWT_MATRIX, COLOUR_LIGHT_BLUE, WID_NG_MATRIX), SetResize(1, 1), SetFill(1, 0),
                        SetMatrixDataTip(1, 0, STR_NETWORK_SERVER_LIST_CLICK_GAME_TO_SELECT), SetScrollbar(WID_NG_SCROLLBAR),
            EndContainer(),
            NWidget(NWID_VSCROLLBAR, COLOUR_LIGHT_BLUE, WID_NG_SCROLLBAR),
          EndContainer(),
          NWidget(NWID_VERTICAL),
            NWidget(WWT_TEXT, COLOUR_LIGHT_BLUE, WID_NG_LASTJOINED_LABEL), SetFill(1, 0),
                      SetDataTip(STR_NETWORK_SERVER_LIST_LAST_JOINED_SERVER, STR_NULL), SetResize(1, 0),
            NWidget(NWID_HORIZONTAL),
              NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, WID_NG_LASTJOINED), SetFill(1, 0), SetResize(1, 0),
                        SetDataTip(0x0, STR_NETWORK_SERVER_LIST_CLICK_TO_SELECT_LAST),
              EndContainer(),
              NWidget(WWT_EMPTY, INVALID_COLOUR, WID_NG_LASTJOINED_SPACER), SetFill(0, 0),
            EndContainer(),
          EndContainer(),
        EndContainer(),
        /* RIGHT SIDE */
        NWidget(NWID_VERTICAL), SetPIP(0, 7, 0),
          NWidget(NWID_HORIZONTAL), SetPIP(0, 7, 0),
            NWidget(WWT_TEXT, COLOUR_LIGHT_BLUE, WID_NG_CLIENT_LABEL), SetDataTip(STR_NETWORK_SERVER_LIST_PLAYER_NAME, STR_NULL),
            NWidget(WWT_EDITBOX, COLOUR_LIGHT_BLUE, WID_NG_CLIENT), SetMinimalSize(151, 12), SetFill(1, 0), SetResize(1, 0),
                      SetDataTip(STR_NETWORK_SERVER_LIST_PLAYER_NAME_OSKTITLE, STR_NETWORK_SERVER_LIST_ENTER_NAME_TOOLTIP),
          EndContainer(),
          NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, WID_NG_DETAILS),
            NWidget(NWID_VERTICAL, NC_EQUALSIZE), SetPIP(5, 5, 5),
              NWidget(WWT_EMPTY, INVALID_COLOUR, WID_NG_DETAILS_SPACER), SetMinimalSize(140, 0), SetMinimalTextLines(15, 24 + WD_PAR_VSEP_NORMAL), SetResize(0, 1), SetFill(1, 1), // Make sure it's at least this wide
              NWidget(NWID_HORIZONTAL, NC_NONE), SetPIP(5, 5, 5),
                NWidget(NWID_SELECTION, INVALID_COLOUR, WID_NG_NEWGRF_MISSING_SEL),
                  NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_NEWGRF_MISSING), SetFill(1, 0), SetDataTip(STR_NEWGRF_SETTINGS_FIND_MISSING_CONTENT_BUTTON, STR_NEWGRF_SETTINGS_FIND_MISSING_CONTENT_TOOLTIP),
                  NWidget(NWID_SPACER), SetFill(1, 0),
                EndContainer(),
              EndContainer(),
              NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(5, 5, 5),
                NWidget(NWID_SPACER), SetFill(1, 0),
                NWidget(NWID_SELECTION, INVALID_COLOUR, WID_NG_NEWGRF_SEL),
                  NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_NEWGRF), SetFill(1, 0), SetDataTip(STR_INTRO_NEWGRF_SETTINGS, STR_NULL),
                  NWidget(NWID_SPACER), SetFill(1, 0),
                EndContainer(),
              EndContainer(),
              NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(5, 5, 5),
                NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_JOIN), SetFill(1, 0), SetDataTip(STR_NETWORK_SERVER_LIST_JOIN_GAME, STR_NULL),
                NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_REFRESH), SetFill(1, 0), SetDataTip(STR_NETWORK_SERVER_LIST_REFRESH, STR_NETWORK_SERVER_LIST_REFRESH_TOOLTIP),
              EndContainer(),
            EndContainer(),
          EndContainer(),
        EndContainer(),
      EndContainer(),
      /* BOTTOM */
      NWidget(NWID_HORIZONTAL),
        NWidget(NWID_VERTICAL),
          NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(10, 7, 4),
            NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_SEARCH_INTERNET), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_NETWORK_SERVER_LIST_SEARCH_SERVER_INTERNET, STR_NETWORK_SERVER_LIST_SEARCH_SERVER_INTERNET_TOOLTIP),
            NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_SEARCH_LAN), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_NETWORK_SERVER_LIST_SEARCH_SERVER_LAN, STR_NETWORK_SERVER_LIST_SEARCH_SERVER_LAN_TOOLTIP),
            NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_ADD), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_NETWORK_SERVER_LIST_ADD_SERVER, STR_NETWORK_SERVER_LIST_ADD_SERVER_TOOLTIP),
            NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_START), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_NETWORK_SERVER_LIST_START_SERVER, STR_NETWORK_SERVER_LIST_START_SERVER_TOOLTIP),
            NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_CANCEL), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_BUTTON_CANCEL, STR_NULL),
          EndContainer(),
          NWidget(NWID_SPACER), SetMinimalSize(0, 6), SetResize(1, 0), SetFill(1, 0),
        EndContainer(),
        NWidget(NWID_VERTICAL),
          NWidget(NWID_SPACER), SetFill(0, 1),
          NWidget(WWT_RESIZEBOX, COLOUR_LIGHT_BLUE),
        EndContainer(),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _network_game_window_desc(
  WDP_CENTER, "list_servers", 1000, 730,
  WC_NETWORK_WINDOW, WC_NONE,
  0,
  _nested_network_game_widgets, lengthof(_nested_network_game_widgets)
);
 
void ShowNetworkGameWindow()
{
  static bool first = true;
  CloseWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_START);
 
  /* Only show once */
  if (first) {
    first = false;
    /* Add all servers from the config file to our list. */
    for (const auto &iter : _network_host_list) {
      NetworkAddServer(iter);
    }
  }
 
  new NetworkGameWindow(&_network_game_window_desc);
}
 
struct NetworkStartServerWindow : public Window {
  byte widget_id;              
  QueryString name_editbox;    
 
  NetworkStartServerWindow(WindowDesc *desc) : Window(desc), name_editbox(NETWORK_NAME_LENGTH)
  {
    this->InitNested(WN_NETWORK_WINDOW_START);
 
    this->querystrings[WID_NSS_GAMENAME] = &this->name_editbox;
    this->name_editbox.text.Assign(_settings_client.network.server_name.c_str());
 
    this->SetFocusedWidget(WID_NSS_GAMENAME);
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_NSS_CONNTYPE_BTN:
        SetDParam(0, STR_NETWORK_SERVER_VISIBILITY_LOCAL + _settings_client.network.server_game_type);
        break;
 
      case WID_NSS_CLIENTS_TXT:
        SetDParam(0, _settings_client.network.max_clients);
        break;
 
      case WID_NSS_COMPANIES_TXT:
        SetDParam(0, _settings_client.network.max_companies);
        break;
    }
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_NSS_CONNTYPE_BTN:
        *size = maxdim(maxdim(GetStringBoundingBox(STR_NETWORK_SERVER_VISIBILITY_LOCAL), GetStringBoundingBox(STR_NETWORK_SERVER_VISIBILITY_PUBLIC)), GetStringBoundingBox(STR_NETWORK_SERVER_VISIBILITY_INVITE_ONLY));
        size->width += padding.width;
        size->height += padding.height;
        break;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    switch (widget) {
      case WID_NSS_SETPWD:
        /* If password is set, draw red '*' next to 'Set password' button. */
        if (!_settings_client.network.server_password.empty()) DrawString(r.right + WD_FRAMERECT_LEFT, this->width - WD_FRAMERECT_RIGHT, r.top, "*", TC_RED);
    }
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_NSS_CANCEL: // Cancel button
        ShowNetworkGameWindow();
        break;
 
      case WID_NSS_SETPWD: // Set password button
        this->widget_id = WID_NSS_SETPWD;
        SetDParamStr(0, _settings_client.network.server_password);
        ShowQueryString(STR_JUST_RAW_STRING, STR_NETWORK_START_SERVER_SET_PASSWORD, 20, this, CS_ALPHANUMERAL, QSF_NONE);
        break;
 
      case WID_NSS_CONNTYPE_BTN: // Connection type
        ShowDropDownList(this, BuildVisibilityDropDownList(), _settings_client.network.server_game_type, WID_NSS_CONNTYPE_BTN);
        break;
 
      case WID_NSS_CLIENTS_BTND:    case WID_NSS_CLIENTS_BTNU:    // Click on up/down button for number of clients
      case WID_NSS_COMPANIES_BTND:  case WID_NSS_COMPANIES_BTNU:  // Click on up/down button for number of companies
        /* Don't allow too fast scrolling. */
        if (!(this->flags & WF_TIMEOUT) || this->timeout_timer <= 1) {
          this->HandleButtonClick(widget);
          this->SetDirty();
          switch (widget) {
            default: NOT_REACHED();
            case WID_NSS_CLIENTS_BTND: case WID_NSS_CLIENTS_BTNU:
              _settings_client.network.max_clients    = Clamp(_settings_client.network.max_clients    + widget - WID_NSS_CLIENTS_TXT,    2, MAX_CLIENTS);
              break;
            case WID_NSS_COMPANIES_BTND: case WID_NSS_COMPANIES_BTNU:
              _settings_client.network.max_companies  = Clamp(_settings_client.network.max_companies  + widget - WID_NSS_COMPANIES_TXT,  1, MAX_COMPANIES);
              break;
          }
        }
        _left_button_clicked = false;
        break;
 
      case WID_NSS_CLIENTS_TXT:    // Click on number of clients
        this->widget_id = WID_NSS_CLIENTS_TXT;
        SetDParam(0, _settings_client.network.max_clients);
        ShowQueryString(STR_JUST_INT, STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS,    4, this, CS_NUMERAL, QSF_NONE);
        break;
 
      case WID_NSS_COMPANIES_TXT:  // Click on number of companies
        this->widget_id = WID_NSS_COMPANIES_TXT;
        SetDParam(0, _settings_client.network.max_companies);
        ShowQueryString(STR_JUST_INT, STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES,  3, this, CS_NUMERAL, QSF_NONE);
        break;
 
      case WID_NSS_GENERATE_GAME: // Start game
        if (!CheckServerName()) return;
        _is_network_server = true;
        if (_ctrl_pressed) {
          StartNewGameWithoutGUI(GENERATE_NEW_SEED);
        } else {
          ShowGenerateLandscape();
        }
        break;
 
      case WID_NSS_LOAD_GAME:
        if (!CheckServerName()) return;
        _is_network_server = true;
        ShowSaveLoadDialog(FT_SAVEGAME, SLO_LOAD);
        break;
 
      case WID_NSS_PLAY_SCENARIO:
        if (!CheckServerName()) return;
        _is_network_server = true;
        ShowSaveLoadDialog(FT_SCENARIO, SLO_LOAD);
        break;
 
      case WID_NSS_PLAY_HEIGHTMAP:
        if (!CheckServerName()) return;
        _is_network_server = true;
        ShowSaveLoadDialog(FT_HEIGHTMAP,SLO_LOAD);
        break;
    }
  }
 
  void OnDropdownSelect(int widget, int index) override
  {
    switch (widget) {
      case WID_NSS_CONNTYPE_BTN:
        _settings_client.network.server_game_type = (ServerGameType)index;
        break;
      default:
        NOT_REACHED();
    }
 
    this->SetDirty();
  }
 
  bool CheckServerName()
  {
    std::string str = this->name_editbox.text.buf;
    if (!NetworkValidateServerName(str)) return false;
 
    SetSettingValue(GetSettingFromName("network.server_name")->AsStringSetting(), str);
    return true;
  }
 
  void OnTimeout() override
  {
    static const int raise_widgets[] = {WID_NSS_CLIENTS_BTND, WID_NSS_CLIENTS_BTNU, WID_NSS_COMPANIES_BTND, WID_NSS_COMPANIES_BTNU, WIDGET_LIST_END};
    for (const int *widget = raise_widgets; *widget != WIDGET_LIST_END; widget++) {
      if (this->IsWidgetLowered(*widget)) {
        this->RaiseWidget(*widget);
        this->SetWidgetDirty(*widget);
      }
    }
  }
 
  void OnQueryTextFinished(char *str) override
  {
    if (str == nullptr) return;
 
    if (this->widget_id == WID_NSS_SETPWD) {
      _settings_client.network.server_password = str;
    } else {
      int32 value = atoi(str);
      this->SetWidgetDirty(this->widget_id);
      switch (this->widget_id) {
        default: NOT_REACHED();
        case WID_NSS_CLIENTS_TXT:    _settings_client.network.max_clients    = Clamp(value, 2, MAX_CLIENTS); break;
        case WID_NSS_COMPANIES_TXT:  _settings_client.network.max_companies  = Clamp(value, 1, MAX_COMPANIES); break;
      }
    }
 
    this->SetDirty();
  }
};
 
static const NWidgetPart _nested_network_start_server_window_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_LIGHT_BLUE),
    NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetDataTip(STR_NETWORK_START_SERVER_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, WID_NSS_BACKGROUND),
    NWidget(NWID_VERTICAL), SetPIP(10, 6, 10),
      NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(10, 6, 10),
        NWidget(NWID_VERTICAL), SetPIP(0, 1, 0),
          /* Game name widgets */
          NWidget(WWT_TEXT, COLOUR_LIGHT_BLUE, WID_NSS_GAMENAME_LABEL), SetFill(1, 0), SetDataTip(STR_NETWORK_START_SERVER_NEW_GAME_NAME, STR_NULL),
          NWidget(WWT_EDITBOX, COLOUR_LIGHT_BLUE, WID_NSS_GAMENAME), SetMinimalSize(10, 12), SetFill(1, 0), SetDataTip(STR_NETWORK_START_SERVER_NEW_GAME_NAME_OSKTITLE, STR_NETWORK_START_SERVER_NEW_GAME_NAME_TOOLTIP),
        EndContainer(),
      EndContainer(),
 
      NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(10, 6, 10),
        NWidget(NWID_VERTICAL), SetPIP(0, 1, 0),
          NWidget(WWT_TEXT, COLOUR_LIGHT_BLUE, WID_NSS_CONNTYPE_LABEL), SetFill(1, 0), SetDataTip(STR_NETWORK_START_SERVER_VISIBILITY_LABEL, STR_NULL),
          NWidget(WWT_DROPDOWN, COLOUR_LIGHT_BLUE, WID_NSS_CONNTYPE_BTN), SetFill(1, 0), SetDataTip(STR_BLACK_STRING, STR_NETWORK_START_SERVER_VISIBILITY_TOOLTIP),
        EndContainer(),
        NWidget(NWID_VERTICAL), SetPIP(0, 1, 0),
          NWidget(NWID_SPACER), SetFill(1, 1),
          NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_SETPWD), SetFill(1, 0), SetDataTip(STR_NETWORK_START_SERVER_SET_PASSWORD, STR_NETWORK_START_SERVER_PASSWORD_TOOLTIP),
        EndContainer(),
      EndContainer(),
 
      NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(10, 6, 10),
        NWidget(NWID_VERTICAL), SetPIP(0, 1, 0),
          NWidget(WWT_TEXT, COLOUR_LIGHT_BLUE, WID_NSS_CLIENTS_LABEL), SetFill(1, 0), SetDataTip(STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS, STR_NULL),
          NWidget(NWID_HORIZONTAL),
            NWidget(WWT_IMGBTN, COLOUR_LIGHT_BLUE, WID_NSS_CLIENTS_BTND), SetMinimalSize(12, 12), SetFill(0, 1), SetDataTip(SPR_ARROW_DOWN, STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS_TOOLTIP),
            NWidget(WWT_PUSHTXTBTN, COLOUR_LIGHT_BLUE, WID_NSS_CLIENTS_TXT), SetFill(1, 0), SetDataTip(STR_NETWORK_START_SERVER_CLIENTS_SELECT, STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS_TOOLTIP),
            NWidget(WWT_IMGBTN, COLOUR_LIGHT_BLUE, WID_NSS_CLIENTS_BTNU), SetMinimalSize(12, 12), SetFill(0, 1), SetDataTip(SPR_ARROW_UP, STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS_TOOLTIP),
          EndContainer(),
        EndContainer(),
 
        NWidget(NWID_VERTICAL), SetPIP(0, 1, 0),
          NWidget(WWT_TEXT, COLOUR_LIGHT_BLUE, WID_NSS_COMPANIES_LABEL), SetFill(1, 0), SetDataTip(STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES, STR_NULL),
          NWidget(NWID_HORIZONTAL),
            NWidget(WWT_IMGBTN, COLOUR_LIGHT_BLUE, WID_NSS_COMPANIES_BTND), SetMinimalSize(12, 12), SetFill(0, 1), SetDataTip(SPR_ARROW_DOWN, STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES_TOOLTIP),
            NWidget(WWT_PUSHTXTBTN, COLOUR_LIGHT_BLUE, WID_NSS_COMPANIES_TXT), SetFill(1, 0), SetDataTip(STR_NETWORK_START_SERVER_COMPANIES_SELECT, STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES_TOOLTIP),
            NWidget(WWT_IMGBTN, COLOUR_LIGHT_BLUE, WID_NSS_COMPANIES_BTNU), SetMinimalSize(12, 12), SetFill(0, 1), SetDataTip(SPR_ARROW_UP, STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES_TOOLTIP),
          EndContainer(),
        EndContainer(),
      EndContainer(),
 
      /* 'generate game' and 'load game' buttons */
      NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(10, 6, 10),
        NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_GENERATE_GAME), SetDataTip(STR_INTRO_NEW_GAME, STR_INTRO_TOOLTIP_NEW_GAME), SetFill(1, 0),
        NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_LOAD_GAME), SetDataTip(STR_INTRO_LOAD_GAME, STR_INTRO_TOOLTIP_LOAD_GAME), SetFill(1, 0),
      EndContainer(),
 
      /* 'play scenario' and 'play heightmap' buttons */
      NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(10, 6, 10),
        NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_PLAY_SCENARIO), SetDataTip(STR_INTRO_PLAY_SCENARIO, STR_INTRO_TOOLTIP_PLAY_SCENARIO), SetFill(1, 0),
        NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_PLAY_HEIGHTMAP), SetDataTip(STR_INTRO_PLAY_HEIGHTMAP, STR_INTRO_TOOLTIP_PLAY_HEIGHTMAP), SetFill(1, 0),
      EndContainer(),
 
      NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(10, 0, 10),
        NWidget(NWID_SPACER), SetFill(1, 0),
        NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_CANCEL), SetDataTip(STR_BUTTON_CANCEL, STR_NULL), SetMinimalSize(128, 12),
        NWidget(NWID_SPACER), SetFill(1, 0),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _network_start_server_window_desc(
  WDP_CENTER, nullptr, 0, 0,
  WC_NETWORK_WINDOW, WC_NONE,
  0,
  _nested_network_start_server_window_widgets, lengthof(_nested_network_start_server_window_widgets)
);
 
static void ShowNetworkStartServerWindow()
{
  if (!NetworkValidateOurClientName()) return;
 
  CloseWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME);
 
  new NetworkStartServerWindow(&_network_start_server_window_desc);
}
 
/* The window below gives information about the connected clients
 * and also makes able to kick them (if server) and stuff like that. */
 
extern void DrawCompanyIcon(CompanyID cid, int x, int y);
 
static const NWidgetPart _nested_client_list_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_NETWORK_CLIENT_LIST_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_DEFSIZEBOX, COLOUR_GREY),
    NWidget(WWT_STICKYBOX, COLOUR_GREY),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY),
    NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_NETWORK_CLIENT_LIST_SERVER, STR_NULL), SetPadding(4, 4, 0, 4), SetPIP(0, 2, 0),
      NWidget(NWID_HORIZONTAL), SetPIP(0, 3, 0),
        NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalTextLines(1, 0), SetDataTip(STR_NETWORK_CLIENT_LIST_SERVER_NAME, STR_NULL),
        NWidget(NWID_SPACER), SetMinimalSize(10, 0),
        NWidget(WWT_TEXT, COLOUR_GREY, WID_CL_SERVER_NAME), SetFill(1, 0), SetMinimalTextLines(1, 0), SetResize(1, 0), SetDataTip(STR_BLACK_RAW_STRING, STR_NETWORK_CLIENT_LIST_SERVER_NAME_TOOLTIP), SetAlignment(SA_VERT_CENTER | SA_RIGHT),
        NWidget(WWT_PUSHIMGBTN, COLOUR_GREY, WID_CL_SERVER_NAME_EDIT), SetMinimalSize(12, 14), SetDataTip(SPR_RENAME, STR_NETWORK_CLIENT_LIST_SERVER_NAME_EDIT_TOOLTIP),
      EndContainer(),
      NWidget(NWID_SELECTION, INVALID_COLOUR, WID_CL_SERVER_SELECTOR),
        NWidget(NWID_VERTICAL),
          NWidget(NWID_HORIZONTAL), SetPIP(0, 3, 0),
            NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalTextLines(1, 0), SetDataTip(STR_NETWORK_CLIENT_LIST_SERVER_VISIBILITY, STR_NULL),
            NWidget(NWID_SPACER), SetMinimalSize(10, 0), SetFill(1, 0), SetResize(1, 0),
            NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_CL_SERVER_VISIBILITY), SetDataTip(STR_BLACK_STRING, STR_NETWORK_CLIENT_LIST_SERVER_VISIBILITY_TOOLTIP),
          EndContainer(),
          NWidget(NWID_HORIZONTAL), SetPIP(0, 3, 0),
            NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalTextLines(1, 0), SetDataTip(STR_NETWORK_CLIENT_LIST_SERVER_INVITE_CODE, STR_NULL),
            NWidget(NWID_SPACER), SetMinimalSize(10, 0),
            NWidget(WWT_TEXT, COLOUR_GREY, WID_CL_SERVER_INVITE_CODE), SetFill(1, 0), SetMinimalTextLines(1, 0), SetResize(1, 0), SetDataTip(STR_BLACK_RAW_STRING, STR_NETWORK_CLIENT_LIST_SERVER_INVITE_CODE_TOOLTIP), SetAlignment(SA_VERT_CENTER | SA_RIGHT),
          EndContainer(),
          NWidget(NWID_HORIZONTAL), SetPIP(0, 3, 0),
            NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalTextLines(1, 0), SetDataTip(STR_NETWORK_CLIENT_LIST_SERVER_CONNECTION_TYPE, STR_NULL),
            NWidget(NWID_SPACER), SetMinimalSize(10, 0),
            NWidget(WWT_TEXT, COLOUR_GREY, WID_CL_SERVER_CONNECTION_TYPE), SetFill(1, 0), SetMinimalTextLines(1, 0), SetResize(1, 0), SetDataTip(STR_BLACK_STRING, STR_NETWORK_CLIENT_LIST_SERVER_CONNECTION_TYPE_TOOLTIP), SetAlignment(SA_VERT_CENTER | SA_RIGHT),
          EndContainer(),
        EndContainer(),
      EndContainer(),
    EndContainer(),
    NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_NETWORK_CLIENT_LIST_PLAYER, STR_NULL), SetPadding(4, 4, 4, 4), SetPIP(0, 2, 0),
      NWidget(NWID_HORIZONTAL), SetPIP(0, 3, 0),
        NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalTextLines(1, 0), SetDataTip(STR_NETWORK_CLIENT_LIST_PLAYER_NAME, STR_NULL),
        NWidget(NWID_SPACER), SetMinimalSize(10, 0),
        NWidget(WWT_TEXT, COLOUR_GREY, WID_CL_CLIENT_NAME), SetFill(1, 0), SetMinimalTextLines(1, 0), SetResize(1, 0), SetDataTip(STR_BLACK_RAW_STRING, STR_NETWORK_CLIENT_LIST_PLAYER_NAME_TOOLTIP), SetAlignment(SA_VERT_CENTER | SA_RIGHT),
        NWidget(WWT_PUSHIMGBTN, COLOUR_GREY, WID_CL_CLIENT_NAME_EDIT), SetMinimalSize(12, 14), SetDataTip(SPR_RENAME, STR_NETWORK_CLIENT_LIST_PLAYER_NAME_EDIT_TOOLTIP),
      EndContainer(),
    EndContainer(),
    NWidget(NWID_HORIZONTAL),
      NWidget(NWID_VERTICAL),
        NWidget(WWT_MATRIX, COLOUR_GREY, WID_CL_MATRIX), SetMinimalSize(180, 0), SetResize(1, 1), SetFill(1, 1), SetMatrixDataTip(1, 0, STR_NULL), SetScrollbar(WID_CL_SCROLLBAR),
        NWidget(WWT_TEXT, COLOUR_GREY, WID_CL_CLIENT_COMPANY_COUNT), SetFill(1, 0), SetMinimalTextLines(1, 0), SetResize(1, 0), SetPadding(2, 1, 2, 1), SetAlignment(SA_CENTER), SetDataTip(STR_NETWORK_CLIENT_LIST_CLIENT_COMPANY_COUNT, STR_NULL),
      EndContainer(),
      NWidget(NWID_VERTICAL),
        NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_CL_SCROLLBAR),
        NWidget(WWT_RESIZEBOX, COLOUR_GREY),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _client_list_desc(
  WDP_AUTO, "list_clients", 220, 300,
  WC_CLIENT_LIST, WC_NONE,
  0,
  _nested_client_list_widgets, lengthof(_nested_client_list_widgets)
);
 
enum DropDownAdmin {
  DD_CLIENT_ADMIN_KICK,
  DD_CLIENT_ADMIN_BAN,
  DD_COMPANY_ADMIN_RESET,
  DD_COMPANY_ADMIN_UNLOCK,
};
 
static void AdminClientKickCallback(Window *w, bool confirmed)
{
  if (confirmed) NetworkServerKickClient(_admin_client_id, {});
}
 
static void AdminClientBanCallback(Window *w, bool confirmed)
{
  if (confirmed) NetworkServerKickOrBanIP(_admin_client_id, true, {});
}
 
static void AdminCompanyResetCallback(Window *w, bool confirmed)
{
  if (confirmed) {
    if (NetworkCompanyHasClients(_admin_company_id)) return;
    DoCommandP(0, CCA_DELETE | _admin_company_id << 16 | CRR_MANUAL << 24, 0, CMD_COMPANY_CTRL);
  }
}
 
static void AdminCompanyUnlockCallback(Window *w, bool confirmed)
{
  if (confirmed) NetworkServerSetCompanyPassword(_admin_company_id, "", false);
}
 
class ButtonCommon {
public:
  SpriteID sprite;   
  StringID tooltip;  
  Colours colour;    
  bool disabled;     
  uint height;       
  uint width;        
 
  ButtonCommon(SpriteID sprite, StringID tooltip, Colours colour, bool disabled = false) :
    sprite(sprite),
    tooltip(tooltip),
    colour(colour),
    disabled(disabled)
  {
    Dimension d = GetSpriteSize(sprite);
    this->height = d.height + ScaleGUITrad(WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM);
    this->width = d.width + ScaleGUITrad(WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT);
  }
  virtual ~ButtonCommon() {}
 
  virtual void OnClick(struct NetworkClientListWindow *w, Point pt) = 0;
};
 
template<typename T>
class Button : public ButtonCommon {
private:
  typedef void (*ButtonCallback)(struct NetworkClientListWindow *w, Point pt, T id); 
  T id;                 
  ButtonCallback proc;  
 
public:
  Button(SpriteID sprite, StringID tooltip, Colours colour, T id, ButtonCallback proc, bool disabled = false) :
    ButtonCommon(sprite, tooltip, colour, disabled),
    id(id),
    proc(proc)
  {
    assert(proc != nullptr);
  }
 
  void OnClick(struct NetworkClientListWindow *w, Point pt) override
  {
    if (this->disabled) return;
 
    this->proc(w, pt, this->id);
  }
};
 
using CompanyButton = Button<CompanyID>;
using ClientButton = Button<ClientID>;
 
struct NetworkClientListWindow : Window {
private:
  ClientListWidgets query_widget; 
  CompanyID join_company; 
 
  ClientID dd_client_id; 
  CompanyID dd_company_id; 
 
  Scrollbar *vscroll; 
  uint line_height; 
  uint line_count; 
  int hover_index; 
  int player_self_index; 
  int player_host_index; 
 
  std::map<uint, std::vector<std::unique_ptr<ButtonCommon>>> buttons; 
 
  static const int CLIENT_OFFSET_LEFT = 12; 
 
  static void OnClickCompanyChat(NetworkClientListWindow *w, Point pt, CompanyID company_id)
  {
    ShowNetworkChatQueryWindow(DESTTYPE_TEAM, company_id);
  }
 
  static void OnClickCompanyJoin(NetworkClientListWindow *w, Point pt, CompanyID company_id)
  {
    if (_network_server) {
      NetworkServerDoMove(CLIENT_ID_SERVER, company_id);
      MarkWholeScreenDirty();
    } else if (NetworkCompanyIsPassworded(company_id)) {
      w->query_widget = WID_CL_COMPANY_JOIN;
      w->join_company = company_id;
      ShowQueryString(STR_EMPTY, STR_NETWORK_NEED_COMPANY_PASSWORD_CAPTION, NETWORK_PASSWORD_LENGTH, w, CS_ALPHANUMERAL, QSF_PASSWORD);
    } else {
      NetworkClientRequestMove(company_id);
    }
  }
 
  static void OnClickCompanyNew(NetworkClientListWindow *w, Point pt, CompanyID company_id)
  {
    if (_network_server) {
      DoCommandP(0, CCA_NEW, _network_own_client_id, CMD_COMPANY_CTRL);
    } else {
      NetworkSendCommand(0, CCA_NEW, 0, CMD_COMPANY_CTRL, nullptr, {}, _local_company);
    }
  }
 
  static void OnClickClientAdmin(NetworkClientListWindow *w, Point pt, ClientID client_id)
  {
    DropDownList list;
    list.emplace_back(new DropDownListStringItem(STR_NETWORK_CLIENT_LIST_ADMIN_CLIENT_KICK, DD_CLIENT_ADMIN_KICK, false));
    list.emplace_back(new DropDownListStringItem(STR_NETWORK_CLIENT_LIST_ADMIN_CLIENT_BAN, DD_CLIENT_ADMIN_BAN, false));
 
    Rect wi_rect;
    wi_rect.left   = pt.x;
    wi_rect.right  = pt.x;
    wi_rect.top    = pt.y;
    wi_rect.bottom = pt.y;
 
    w->dd_client_id = client_id;
    ShowDropDownListAt(w, std::move(list), -1, WID_CL_MATRIX, wi_rect, COLOUR_GREY, true, true);
  }
 
  static void OnClickCompanyAdmin(NetworkClientListWindow *w, Point pt, CompanyID company_id)
  {
    DropDownList list;
    list.emplace_back(new DropDownListStringItem(STR_NETWORK_CLIENT_LIST_ADMIN_COMPANY_RESET, DD_COMPANY_ADMIN_RESET, NetworkCompanyHasClients(company_id)));
    list.emplace_back(new DropDownListStringItem(STR_NETWORK_CLIENT_LIST_ADMIN_COMPANY_UNLOCK, DD_COMPANY_ADMIN_UNLOCK, !NetworkCompanyIsPassworded(company_id)));
 
    Rect wi_rect;
    wi_rect.left   = pt.x;
    wi_rect.right  = pt.x;
    wi_rect.top    = pt.y;
    wi_rect.bottom = pt.y;
 
    w->dd_company_id = company_id;
    ShowDropDownListAt(w, std::move(list), -1, WID_CL_MATRIX, wi_rect, COLOUR_GREY, true, true);
  }
  static void OnClickClientChat(NetworkClientListWindow *w, Point pt, ClientID client_id)
  {
    ShowNetworkChatQueryWindow(DESTTYPE_CLIENT, client_id);
  }
 
  void RebuildListCompany(CompanyID company_id, CompanyID client_playas)
  {
    ButtonCommon *chat_button = new CompanyButton(SPR_CHAT, company_id == COMPANY_SPECTATOR ? STR_NETWORK_CLIENT_LIST_CHAT_SPECTATOR_TOOLTIP : STR_NETWORK_CLIENT_LIST_CHAT_COMPANY_TOOLTIP, COLOUR_ORANGE, company_id, &NetworkClientListWindow::OnClickCompanyChat);
 
    if (_network_server) this->buttons[line_count].emplace_back(new CompanyButton(SPR_ADMIN, STR_NETWORK_CLIENT_LIST_ADMIN_COMPANY_TOOLTIP, COLOUR_RED, company_id, &NetworkClientListWindow::OnClickCompanyAdmin, company_id == COMPANY_SPECTATOR));
    this->buttons[line_count].emplace_back(chat_button);
    if (client_playas != company_id) this->buttons[line_count].emplace_back(new CompanyButton(SPR_JOIN, STR_NETWORK_CLIENT_LIST_JOIN_TOOLTIP, COLOUR_ORANGE, company_id, &NetworkClientListWindow::OnClickCompanyJoin, company_id != COMPANY_SPECTATOR && Company::Get(company_id)->is_ai));
 
    this->line_count += 1;
 
    bool has_players = false;
    for (const NetworkClientInfo *ci : NetworkClientInfo::Iterate()) {
      if (ci->client_playas != company_id) continue;
      has_players = true;
 
      if (_network_server) this->buttons[line_count].emplace_back(new ClientButton(SPR_ADMIN, STR_NETWORK_CLIENT_LIST_ADMIN_CLIENT_TOOLTIP, COLOUR_RED, ci->client_id, &NetworkClientListWindow::OnClickClientAdmin, _network_own_client_id == ci->client_id));
      if (_network_own_client_id != ci->client_id) this->buttons[line_count].emplace_back(new ClientButton(SPR_CHAT, STR_NETWORK_CLIENT_LIST_CHAT_CLIENT_TOOLTIP, COLOUR_ORANGE, ci->client_id, &NetworkClientListWindow::OnClickClientChat));
 
      if (ci->client_id == _network_own_client_id) {
        this->player_self_index = this->line_count;
      } else if (ci->client_id == CLIENT_ID_SERVER) {
        this->player_host_index = this->line_count;
      }
 
      this->line_count += 1;
    }
 
    /* Disable the chat button when there are players in this company. */
    chat_button->disabled = !has_players;
  }
 
  void RebuildList()
  {
    const NetworkClientInfo *own_ci = NetworkClientInfo::GetByClientID(_network_own_client_id);
    CompanyID client_playas = own_ci == nullptr ? COMPANY_SPECTATOR : own_ci->client_playas;
 
    this->buttons.clear();
    this->line_count = 0;
    this->player_host_index = -1;
    this->player_self_index = -1;
 
    /* As spectator, show a line to create a new company. */
    if (client_playas == COMPANY_SPECTATOR && !NetworkMaxCompaniesReached()) {
      this->buttons[line_count].emplace_back(new CompanyButton(SPR_JOIN, STR_NETWORK_CLIENT_LIST_NEW_COMPANY_TOOLTIP, COLOUR_ORANGE, COMPANY_SPECTATOR, &NetworkClientListWindow::OnClickCompanyNew));
      this->line_count += 1;
    }
 
    if (client_playas != COMPANY_SPECTATOR) {
      this->RebuildListCompany(client_playas, client_playas);
    }
 
    /* Companies */
    for (const Company *c : Company::Iterate()) {
      if (c->index == client_playas) continue;
 
      this->RebuildListCompany(c->index, client_playas);
    }
 
    /* Spectators */
    this->RebuildListCompany(COMPANY_SPECTATOR, client_playas);
 
    this->vscroll->SetCount(this->line_count);
  }
 
  ButtonCommon *GetButtonAtPoint(Point pt)
  {
    uint index = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_CL_MATRIX);
    NWidgetBase *widget_matrix = this->GetWidget<NWidgetBase>(WID_CL_MATRIX);
 
    bool rtl = _current_text_dir == TD_RTL;
    uint x = rtl ? (uint)widget_matrix->pos_x + WD_FRAMERECT_LEFT : widget_matrix->current_x - WD_FRAMERECT_RIGHT;
 
    /* Find the buttons for this row. */
    auto button_find = this->buttons.find(index);
    if (button_find == this->buttons.end()) return nullptr;
 
    /* Check if we want to display a tooltip for any of the buttons. */
    for (auto &button : button_find->second) {
      uint left = rtl ? x : x - button->width;
      uint right = rtl ? x + button->width : x;
 
      if (IsInsideMM(pt.x, left, right)) {
        return button.get();
      }
 
      int width = button->width + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
      x += rtl ? width : -width;
    }
 
    return nullptr;
  }
 
public:
  NetworkClientListWindow(WindowDesc *desc, WindowNumber window_number) :
      Window(desc),
      hover_index(-1),
      player_self_index(-1),
      player_host_index(-1)
  {
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_CL_SCROLLBAR);
    this->OnInvalidateData();
    this->FinishInitNested(window_number);
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    this->RebuildList();
 
    /* Currently server information is not sync'd to clients, so we cannot show it on clients. */
    this->GetWidget<NWidgetStacked>(WID_CL_SERVER_SELECTOR)->SetDisplayedPlane(_network_server ? 0 : SZSP_HORIZONTAL);
    this->SetWidgetDisabledState(WID_CL_SERVER_NAME_EDIT, !_network_server);
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_CL_SERVER_VISIBILITY:
        *size = maxdim(maxdim(GetStringBoundingBox(STR_NETWORK_SERVER_VISIBILITY_LOCAL), GetStringBoundingBox(STR_NETWORK_SERVER_VISIBILITY_PUBLIC)), GetStringBoundingBox(STR_NETWORK_SERVER_VISIBILITY_INVITE_ONLY));
        size->width += padding.width;
        size->height += padding.height;
        break;
 
      case WID_CL_MATRIX: {
        uint height = std::max({GetSpriteSize(SPR_COMPANY_ICON).height, GetSpriteSize(SPR_JOIN).height, GetSpriteSize(SPR_ADMIN).height, GetSpriteSize(SPR_CHAT).height});
        height += ScaleGUITrad(WD_FRAMERECT_TOP) + ScaleGUITrad(WD_FRAMERECT_BOTTOM);
        this->line_height = std::max(height, (uint)FONT_HEIGHT_NORMAL) + ScaleGUITrad(WD_MATRIX_TOP + WD_MATRIX_BOTTOM);
 
        resize->width = 1;
        resize->height = this->line_height;
        fill->height = this->line_height;
        size->height = std::max(size->height, 5 * this->line_height);
        break;
      }
    }
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_CL_MATRIX);
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_CL_SERVER_NAME:
        SetDParamStr(0, _network_server ? _settings_client.network.server_name : _network_server_name);
        break;
 
      case WID_CL_SERVER_VISIBILITY:
        SetDParam(0, STR_NETWORK_SERVER_VISIBILITY_LOCAL + _settings_client.network.server_game_type);
        break;
 
      case WID_CL_SERVER_INVITE_CODE: {
        static std::string empty = {};
        SetDParamStr(0, _network_server_connection_type == CONNECTION_TYPE_UNKNOWN ? empty : _network_server_invite_code);
        break;
      }
 
      case WID_CL_SERVER_CONNECTION_TYPE:
        SetDParam(0, STR_NETWORK_CLIENT_LIST_SERVER_CONNECTION_TYPE_UNKNOWN + _network_server_connection_type);
        break;
 
      case WID_CL_CLIENT_NAME:
        SetDParamStr(0, _settings_client.network.client_name);
        break;
 
      case WID_CL_CLIENT_COMPANY_COUNT:
        SetDParam(0, NetworkClientInfo::GetNumItems());
        SetDParam(1, Company::GetNumItems());
        break;
    }
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_CL_SERVER_NAME_EDIT:
        if (!_network_server) break;
 
        this->query_widget = WID_CL_SERVER_NAME_EDIT;
        SetDParamStr(0, _settings_client.network.server_name);
        ShowQueryString(STR_JUST_RAW_STRING, STR_NETWORK_CLIENT_LIST_SERVER_NAME_QUERY_CAPTION, NETWORK_NAME_LENGTH, this, CS_ALPHANUMERAL, QSF_LEN_IN_CHARS);
        break;
 
      case WID_CL_CLIENT_NAME_EDIT:
        this->query_widget = WID_CL_CLIENT_NAME_EDIT;
        SetDParamStr(0, _settings_client.network.client_name);
        ShowQueryString(STR_JUST_RAW_STRING, STR_NETWORK_CLIENT_LIST_PLAYER_NAME_QUERY_CAPTION, NETWORK_CLIENT_NAME_LENGTH, this, CS_ALPHANUMERAL, QSF_LEN_IN_CHARS);
        break;
 
      case WID_CL_SERVER_VISIBILITY:
        if (!_network_server) break;
 
        ShowDropDownList(this, BuildVisibilityDropDownList(), _settings_client.network.server_game_type, WID_CL_SERVER_VISIBILITY);
        break;
 
      case WID_CL_MATRIX: {
        ButtonCommon *button = this->GetButtonAtPoint(pt);
        if (button == nullptr) break;
 
        button->OnClick(this, pt);
        break;
      }
    }
  }
 
  bool OnTooltip(Point pt, int widget, TooltipCloseCondition close_cond) override
  {
    switch (widget) {
      case WID_CL_MATRIX: {
        int index = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_CL_MATRIX);
 
        bool rtl = _current_text_dir == TD_RTL;
        NWidgetBase *widget_matrix = this->GetWidget<NWidgetBase>(WID_CL_MATRIX);
 
        Dimension d = GetSpriteSize(SPR_COMPANY_ICON);
        uint text_left = widget_matrix->pos_x + (rtl ? (uint)WD_FRAMERECT_LEFT : d.width + 8);
        uint text_right = widget_matrix->pos_x + widget_matrix->current_x - (rtl ? d.width + 8 : (uint)WD_FRAMERECT_RIGHT);
 
        Dimension d2 = GetSpriteSize(SPR_PLAYER_SELF);
        uint offset_x = CLIENT_OFFSET_LEFT - d2.width - 3;
 
        uint player_icon_x = rtl ? text_right - offset_x - d2.width : text_left + offset_x;
 
        if (IsInsideMM(pt.x, player_icon_x, player_icon_x + d2.width)) {
          if (index == this->player_self_index) {
            GuiShowTooltips(this, STR_NETWORK_CLIENT_LIST_PLAYER_ICON_SELF_TOOLTIP, 0, nullptr, close_cond);
            return true;
          } else if (index == this->player_host_index) {
            GuiShowTooltips(this, STR_NETWORK_CLIENT_LIST_PLAYER_ICON_HOST_TOOLTIP, 0, nullptr, close_cond);
            return true;
          }
        }
 
        ButtonCommon *button = this->GetButtonAtPoint(pt);
        if (button == nullptr) return false;
 
        GuiShowTooltips(this, button->tooltip, 0, nullptr, close_cond);
        return true;
      };
    }
 
    return false;
  }
 
  void OnDropdownClose(Point pt, int widget, int index, bool instant_close) override
  {
    /* If you close the dropdown outside the list, don't take any action. */
    if (widget == WID_CL_MATRIX) return;
 
    Window::OnDropdownClose(pt, widget, index, instant_close);
  }
 
  void OnDropdownSelect(int widget, int index) override
  {
    switch (widget) {
      case WID_CL_SERVER_VISIBILITY:
        if (!_network_server) break;
 
        _settings_client.network.server_game_type = (ServerGameType)index;
        NetworkUpdateServerGameType();
        break;
 
      case WID_CL_MATRIX: {
        StringID text = STR_NULL;
        QueryCallbackProc *callback = nullptr;
 
        switch (index) {
          case DD_CLIENT_ADMIN_KICK:
            _admin_client_id = this->dd_client_id;
            text = STR_NETWORK_CLIENT_LIST_ASK_CLIENT_KICK;
            callback = AdminClientKickCallback;
            SetDParamStr(0, NetworkClientInfo::GetByClientID(_admin_client_id)->client_name);
            break;
 
          case DD_CLIENT_ADMIN_BAN:
            _admin_client_id = this->dd_client_id;
            text = STR_NETWORK_CLIENT_LIST_ASK_CLIENT_BAN;
            callback = AdminClientBanCallback;
            SetDParamStr(0, NetworkClientInfo::GetByClientID(_admin_client_id)->client_name);
            break;
 
          case DD_COMPANY_ADMIN_RESET:
            _admin_company_id = this->dd_company_id;
            text = STR_NETWORK_CLIENT_LIST_ASK_COMPANY_RESET;
            callback = AdminCompanyResetCallback;
            SetDParam(0, _admin_company_id);
            break;
 
          case DD_COMPANY_ADMIN_UNLOCK:
            _admin_company_id = this->dd_company_id;
            text = STR_NETWORK_CLIENT_LIST_ASK_COMPANY_UNLOCK;
            callback = AdminCompanyUnlockCallback;
            SetDParam(0, _admin_company_id);
            break;
 
          default:
            NOT_REACHED();
        }
 
        assert(text != STR_NULL);
        assert(callback != nullptr);
 
        /* Always ask confirmation for all admin actions. */
        ShowQuery(STR_NETWORK_CLIENT_LIST_ASK_CAPTION, text, this, callback);
 
        break;
      }
 
      default:
        NOT_REACHED();
    }
 
    this->SetDirty();
  }
 
  void OnQueryTextFinished(char *str) override
  {
    if (str == nullptr) return;
 
    switch (this->query_widget) {
      default: NOT_REACHED();
 
      case WID_CL_SERVER_NAME_EDIT: {
        if (!_network_server) break;
 
        SetSettingValue(GetSettingFromName("network.server_name")->AsStringSetting(), str);
        this->InvalidateData();
        break;
      }
 
      case WID_CL_CLIENT_NAME_EDIT: {
        SetSettingValue(GetSettingFromName("network.client_name")->AsStringSetting(), str);
        this->InvalidateData();
        break;
      }
 
      case WID_CL_COMPANY_JOIN:
        NetworkClientRequestMove(this->join_company, str);
        break;
    }
  }
 
  void DrawButtons(uint &x, uint y, const std::vector<std::unique_ptr<ButtonCommon>> &buttons) const
  {
    for (auto &button : buttons) {
      bool rtl = _current_text_dir == TD_RTL;
 
      uint left = rtl ? x : x - button->width;
      uint right = rtl ? x + button->width : x;
 
      int offset = std::max(0, ((int)(this->line_height + 1) - (int)button->height) / 2);
 
      DrawFrameRect(left, y + offset, right, y + offset + button->height, button->colour, FR_NONE);
      DrawSprite(button->sprite, PAL_NONE, left + ScaleGUITrad(WD_FRAMERECT_LEFT), y + offset + ScaleGUITrad(WD_FRAMERECT_TOP));
      if (button->disabled) {
        GfxFillRect(left + 1, y + offset + 1, right - 1, y + offset + button->height - 1, _colour_gradient[button->colour & 0xF][2], FILLRECT_CHECKER);
      }
 
      int width = button->width + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
      x += rtl ? width : -width;
    }
  }
 
  void DrawCompany(CompanyID company_id, uint left, uint right, uint top, uint &line) const
  {
    bool rtl = _current_text_dir == TD_RTL;
    int text_y_offset = std::max(0, ((int)(this->line_height + 1) - (int)FONT_HEIGHT_NORMAL) / 2) + WD_MATRIX_BOTTOM;
 
    Dimension d = GetSpriteSize(SPR_COMPANY_ICON);
    int offset = std::max(0, ((int)(this->line_height + 1) - (int)d.height) / 2);
 
    uint text_left = left + (rtl ? (uint)WD_FRAMERECT_LEFT : d.width + 8);
    uint text_right = right - (rtl ? d.width + 8 : (uint)WD_FRAMERECT_RIGHT);
 
    uint line_start = this->vscroll->GetPosition();
    uint line_end = line_start + this->vscroll->GetCapacity();
 
    uint y = top + (this->line_height * (line - line_start));
 
    /* Draw the company line (if in range of scrollbar). */
    if (IsInsideMM(line, line_start, line_end)) {
      uint x = rtl ? text_left : text_right;
 
      /* If there are buttons for this company, draw them. */
      auto button_find = this->buttons.find(line);
      if (button_find != this->buttons.end()) {
        this->DrawButtons(x, y, button_find->second);
      }
 
      if (company_id == COMPANY_SPECTATOR) {
        DrawSprite(SPR_COMPANY_ICON, PALETTE_TO_GREY, rtl ? right - d.width - 4 : left + 4, y + offset);
        DrawString(rtl ? x : text_left, rtl ? text_right : x, y + text_y_offset, STR_NETWORK_CLIENT_LIST_SPECTATORS, TC_SILVER);
      } else if (company_id == COMPANY_NEW_COMPANY) {
        DrawSprite(SPR_COMPANY_ICON, PALETTE_TO_GREY, rtl ? right - d.width - 4 : left + 4, y + offset);
        DrawString(rtl ? x : text_left, rtl ? text_right : x, y + text_y_offset, STR_NETWORK_CLIENT_LIST_NEW_COMPANY, TC_WHITE);
      } else {
        DrawCompanyIcon(company_id, rtl ? right - d.width - 4 : left + 4, y + offset);
 
        SetDParam(0, company_id);
        SetDParam(1, company_id);
        DrawString(rtl ? x : text_left, rtl ? text_right : x, y + text_y_offset, STR_COMPANY_NAME, TC_SILVER);
      }
    }
 
    y += this->line_height;
    line++;
 
    for (const NetworkClientInfo *ci : NetworkClientInfo::Iterate()) {
      if (ci->client_playas != company_id) continue;
 
      /* Draw the player line (if in range of scrollbar). */
      if (IsInsideMM(line, line_start, line_end)) {
        uint x = rtl ? text_left : text_right;
 
        /* If there are buttons for this client, draw them. */
        auto button_find = this->buttons.find(line);
        if (button_find != this->buttons.end()) {
          this->DrawButtons(x, y, button_find->second);
        }
 
        SpriteID player_icon = 0;
        if (ci->client_id == _network_own_client_id) {
          player_icon = SPR_PLAYER_SELF;
        } else if (ci->client_id == CLIENT_ID_SERVER) {
          player_icon = SPR_PLAYER_HOST;
        }
 
        if (player_icon != 0) {
          Dimension d2 = GetSpriteSize(player_icon);
          uint offset_x = CLIENT_OFFSET_LEFT - 3;
          int offset_y = std::max(0, ((int)(this->line_height + 1) - (int)d2.height) / 2);
          DrawSprite(player_icon, PALETTE_TO_GREY, rtl ? text_right - offset_x : text_left + offset_x - d2.width, y + offset_y);
        }
 
        SetDParamStr(0, ci->client_name);
        DrawString(rtl ? x : text_left + CLIENT_OFFSET_LEFT, rtl ? text_right - CLIENT_OFFSET_LEFT : x, y + text_y_offset, STR_JUST_RAW_STRING, TC_BLACK);
      }
 
      y += this->line_height;
      line++;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    switch (widget) {
      case WID_CL_MATRIX: {
        uint line = 0;
 
        if (this->hover_index >= 0) {
          uint offset = this->hover_index * this->line_height;
          GfxFillRect(r.left + 2, r.top + offset, r.right - 1, r.top + offset + this->line_height - 2, GREY_SCALE(9));
        }
 
        NetworkClientInfo *own_ci = NetworkClientInfo::GetByClientID(_network_own_client_id);
        CompanyID client_playas = own_ci == nullptr ? COMPANY_SPECTATOR : own_ci->client_playas;
 
        if (client_playas == COMPANY_SPECTATOR && !NetworkMaxCompaniesReached()) {
          this->DrawCompany(COMPANY_NEW_COMPANY, r.left, r.right, r.top, line);
        }
 
        if (client_playas != COMPANY_SPECTATOR) {
          this->DrawCompany(client_playas, r.left, r.right, r.top, line);
        }
 
        for (const Company *c : Company::Iterate()) {
          if (client_playas == c->index) continue;
          this->DrawCompany(c->index, r.left, r.right, r.top, line);
        }
 
        /* Spectators */
        this->DrawCompany(COMPANY_SPECTATOR, r.left, r.right, r.top, line);
 
        break;
      }
    }
  }
 
  virtual void OnMouseLoop() override
  {
    if (GetWidgetFromPos(this, _cursor.pos.x - this->left, _cursor.pos.y - this->top) != WID_CL_MATRIX) {
      this->hover_index = -1;
      this->SetDirty();
      return;
    }
 
    NWidgetBase *nwi = this->GetWidget<NWidgetBase>(WID_CL_MATRIX);
    int y = _cursor.pos.y - this->top - nwi->pos_y - 2;
    int index = y / this->line_height;
 
    if (index != this->hover_index) {
      this->hover_index = index;
      this->SetDirty();
    }
  }
};
 
void ShowClientList()
{
  AllocateWindowDescFront<NetworkClientListWindow>(&_client_list_desc, 0);
}
 
NetworkJoinStatus _network_join_status; 
uint8 _network_join_waiting;            
uint32 _network_join_bytes;             
uint32 _network_join_bytes_total;       
 
struct NetworkJoinStatusWindow : Window {
  NetworkPasswordType password_type;
 
  NetworkJoinStatusWindow(WindowDesc *desc) : Window(desc)
  {
    this->parent = FindWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME);
    this->InitNested(WN_NETWORK_STATUS_WINDOW_JOIN);
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    if (widget != WID_NJS_BACKGROUND) return;
 
    uint8 progress; // used for progress bar
    DrawString(r.left + 2, r.right - 2, r.top + 20, STR_NETWORK_CONNECTING_1 + _network_join_status, TC_FROMSTRING, SA_HOR_CENTER);
    switch (_network_join_status) {
      case NETWORK_JOIN_STATUS_CONNECTING: case NETWORK_JOIN_STATUS_AUTHORIZING:
      case NETWORK_JOIN_STATUS_GETTING_COMPANY_INFO:
        progress = 10; // first two stages 10%
        break;
      case NETWORK_JOIN_STATUS_WAITING:
        SetDParam(0, _network_join_waiting);
        DrawString(r.left + 2, r.right - 2, r.top + 20 + FONT_HEIGHT_NORMAL, STR_NETWORK_CONNECTING_WAITING, TC_FROMSTRING, SA_HOR_CENTER);
        progress = 15; // third stage is 15%
        break;
      case NETWORK_JOIN_STATUS_DOWNLOADING:
        SetDParam(0, _network_join_bytes);
        SetDParam(1, _network_join_bytes_total);
        DrawString(r.left + 2, r.right - 2, r.top + 20 + FONT_HEIGHT_NORMAL, _network_join_bytes_total == 0 ? STR_NETWORK_CONNECTING_DOWNLOADING_1 : STR_NETWORK_CONNECTING_DOWNLOADING_2, TC_FROMSTRING, SA_HOR_CENTER);
        if (_network_join_bytes_total == 0) {
          progress = 15; // We don't have the final size yet; the server is still compressing!
          break;
        }
        FALLTHROUGH;
 
      default: // Waiting is 15%, so the resting receivement of map is maximum 70%
        progress = 15 + _network_join_bytes * (100 - 15) / _network_join_bytes_total;
    }
 
    /* Draw nice progress bar :) */
    DrawFrameRect(r.left + 20, r.top + 5, (int)((this->width - 20) * progress / 100), r.top + 15, COLOUR_MAUVE, FR_NONE);
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    if (widget != WID_NJS_BACKGROUND) return;
 
    size->height = 25 + 2 * FONT_HEIGHT_NORMAL;
 
    /* Account for the statuses */
    uint width = 0;
    for (uint i = 0; i < NETWORK_JOIN_STATUS_END; i++) {
      width = std::max(width, GetStringBoundingBox(STR_NETWORK_CONNECTING_1 + i).width);
    }
 
    /* For the number of waiting (other) players */
    SetDParamMaxValue(0, MAX_CLIENTS);
    width = std::max(width, GetStringBoundingBox(STR_NETWORK_CONNECTING_WAITING).width);
 
    /* Account for downloading ~ 10 MiB */
    SetDParamMaxDigits(0, 8);
    SetDParamMaxDigits(1, 8);
    width = std::max(width, GetStringBoundingBox(STR_NETWORK_CONNECTING_DOWNLOADING_1).width);
    width = std::max(width, GetStringBoundingBox(STR_NETWORK_CONNECTING_DOWNLOADING_2).width);
 
    /* Give a bit more clearing for the widest strings than strictly needed */
    size->width = width + WD_FRAMERECT_LEFT + WD_FRAMERECT_BOTTOM + 10;
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    if (widget == WID_NJS_CANCELOK) { // Disconnect button
      NetworkDisconnect();
      SwitchToMode(SM_MENU);
      ShowNetworkGameWindow();
    }
  }
 
  void OnQueryTextFinished(char *str) override
  {
    if (StrEmpty(str)) {
      NetworkDisconnect();
      return;
    }
 
    switch (this->password_type) {
      case NETWORK_GAME_PASSWORD:    MyClient::SendGamePassword   (str); break;
      case NETWORK_COMPANY_PASSWORD: MyClient::SendCompanyPassword(str); break;
      default: NOT_REACHED();
    }
  }
};
 
static const NWidgetPart _nested_network_join_status_window_widgets[] = {
  NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_NETWORK_CONNECTING_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
  NWidget(WWT_PANEL, COLOUR_GREY),
    NWidget(WWT_EMPTY, COLOUR_GREY, WID_NJS_BACKGROUND),
    NWidget(NWID_HORIZONTAL),
      NWidget(NWID_SPACER), SetMinimalSize(75, 0), SetFill(1, 0),
      NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NJS_CANCELOK), SetMinimalSize(101, 12), SetDataTip(STR_NETWORK_CONNECTION_DISCONNECT, STR_NULL),
      NWidget(NWID_SPACER), SetMinimalSize(75, 0), SetFill(1, 0),
    EndContainer(),
    NWidget(NWID_SPACER), SetMinimalSize(0, 4),
  EndContainer(),
};
 
static WindowDesc _network_join_status_window_desc(
  WDP_CENTER, nullptr, 0, 0,
  WC_NETWORK_STATUS_WINDOW, WC_NONE,
  WDF_MODAL,
  _nested_network_join_status_window_widgets, lengthof(_nested_network_join_status_window_widgets)
);
 
void ShowJoinStatusWindow()
{
  CloseWindowById(WC_NETWORK_STATUS_WINDOW, WN_NETWORK_STATUS_WINDOW_JOIN);
  new NetworkJoinStatusWindow(&_network_join_status_window_desc);
}
 
void ShowNetworkNeedPassword(NetworkPasswordType npt)
{
  NetworkJoinStatusWindow *w = (NetworkJoinStatusWindow *)FindWindowById(WC_NETWORK_STATUS_WINDOW, WN_NETWORK_STATUS_WINDOW_JOIN);
  if (w == nullptr) return;
  w->password_type = npt;
 
  StringID caption;
  switch (npt) {
    default: NOT_REACHED();
    case NETWORK_GAME_PASSWORD:    caption = STR_NETWORK_NEED_GAME_PASSWORD_CAPTION; break;
    case NETWORK_COMPANY_PASSWORD: caption = STR_NETWORK_NEED_COMPANY_PASSWORD_CAPTION; break;
  }
  ShowQueryString(STR_EMPTY, caption, NETWORK_PASSWORD_LENGTH, w, CS_ALPHANUMERAL, QSF_PASSWORD);
}
 
struct NetworkCompanyPasswordWindow : public Window {
  QueryString password_editbox; 
  Dimension warning_size;       
 
  NetworkCompanyPasswordWindow(WindowDesc *desc, Window *parent) : Window(desc), password_editbox(lengthof(_settings_client.network.default_company_pass))
  {
    this->InitNested(0);
    this->UpdateWarningStringSize();
 
    this->parent = parent;
    this->querystrings[WID_NCP_PASSWORD] = &this->password_editbox;
    this->password_editbox.cancel_button = WID_NCP_CANCEL;
    this->password_editbox.ok_button = WID_NCP_OK;
    this->SetFocusedWidget(WID_NCP_PASSWORD);
  }
 
  void UpdateWarningStringSize()
  {
    assert(this->nested_root->smallest_x > 0);
    this->warning_size.width = this->nested_root->current_x - (WD_FRAMETEXT_LEFT + WD_FRAMETEXT_RIGHT + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT);
    this->warning_size.height = GetStringHeight(STR_WARNING_PASSWORD_SECURITY, this->warning_size.width);
    this->warning_size.height += WD_FRAMETEXT_TOP + WD_FRAMETEXT_BOTTOM + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
 
    this->ReInit();
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    if (widget == WID_NCP_WARNING) {
      *size = this->warning_size;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    if (widget != WID_NCP_WARNING) return;
 
    DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT,
      r.top + WD_FRAMERECT_TOP, r.bottom - WD_FRAMERECT_BOTTOM,
      STR_WARNING_PASSWORD_SECURITY, TC_FROMSTRING, SA_CENTER);
  }
 
  void OnOk()
  {
    if (this->IsWidgetLowered(WID_NCP_SAVE_AS_DEFAULT_PASSWORD)) {
      _settings_client.network.default_company_pass = this->password_editbox.text.buf;
    }
 
    NetworkChangeCompanyPassword(_local_company, this->password_editbox.text.buf);
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_NCP_OK:
        this->OnOk();
        FALLTHROUGH;
 
      case WID_NCP_CANCEL:
        this->Close();
        break;
 
      case WID_NCP_SAVE_AS_DEFAULT_PASSWORD:
        this->ToggleWidgetLoweredState(WID_NCP_SAVE_AS_DEFAULT_PASSWORD);
        this->SetDirty();
        break;
    }
  }
};
 
static const NWidgetPart _nested_network_company_password_window_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_COMPANY_PASSWORD_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY, WID_NCP_BACKGROUND),
    NWidget(NWID_VERTICAL), SetPIP(5, 5, 5),
      NWidget(NWID_HORIZONTAL), SetPIP(5, 5, 5),
        NWidget(WWT_TEXT, COLOUR_GREY, WID_NCP_LABEL), SetDataTip(STR_COMPANY_VIEW_PASSWORD, STR_NULL),
        NWidget(WWT_EDITBOX, COLOUR_GREY, WID_NCP_PASSWORD), SetFill(1, 0), SetMinimalSize(194, 12), SetDataTip(STR_COMPANY_VIEW_SET_PASSWORD, STR_NULL),
      EndContainer(),
      NWidget(NWID_HORIZONTAL), SetPIP(5, 0, 5),
        NWidget(NWID_SPACER), SetFill(1, 0),
        NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_NCP_SAVE_AS_DEFAULT_PASSWORD), SetMinimalSize(194, 12),
                      SetDataTip(STR_COMPANY_PASSWORD_MAKE_DEFAULT, STR_COMPANY_PASSWORD_MAKE_DEFAULT_TOOLTIP),
      EndContainer(),
    EndContainer(),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY, WID_NCP_WARNING), EndContainer(),
  NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
    NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_NCP_CANCEL), SetFill(1, 0), SetDataTip(STR_BUTTON_CANCEL, STR_COMPANY_PASSWORD_CANCEL),
    NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_NCP_OK), SetFill(1, 0), SetDataTip(STR_BUTTON_OK, STR_COMPANY_PASSWORD_OK),
  EndContainer(),
};
 
static WindowDesc _network_company_password_window_desc(
  WDP_AUTO, nullptr, 0, 0,
  WC_COMPANY_PASSWORD_WINDOW, WC_NONE,
  0,
  _nested_network_company_password_window_widgets, lengthof(_nested_network_company_password_window_widgets)
);
 
void ShowNetworkCompanyPasswordWindow(Window *parent)
{
  CloseWindowById(WC_COMPANY_PASSWORD_WINDOW, 0);
 
  new NetworkCompanyPasswordWindow(&_network_company_password_window_desc, parent);
}
 
struct NetworkAskRelayWindow : public Window {
  std::string server_connection_string; 
  std::string relay_connection_string;  
  std::string token;                    
 
  NetworkAskRelayWindow(WindowDesc *desc, Window *parent, const std::string &server_connection_string, const std::string &relay_connection_string, const std::string &token) :
    Window(desc),
    server_connection_string(server_connection_string),
    relay_connection_string(relay_connection_string),
    token(token)
  {
    this->parent = parent;
    this->InitNested(0);
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    if (widget == WID_NAR_TEXT) {
      *size = GetStringBoundingBox(STR_NETWORK_ASK_RELAY_TEXT);
      size->height = GetStringHeight(STR_NETWORK_ASK_RELAY_TEXT, size->width - WD_FRAMETEXT_LEFT - WD_FRAMETEXT_RIGHT) + WD_FRAMETEXT_BOTTOM + WD_FRAMETEXT_TOP;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    if (widget == WID_NAR_TEXT) {
      DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, r.top + WD_FRAMETEXT_TOP, r.bottom - WD_FRAMETEXT_BOTTOM, STR_NETWORK_ASK_RELAY_TEXT, TC_FROMSTRING, SA_CENTER);
    }
  }
 
  void FindWindowPlacementAndResize(int def_width, int def_height) override
  {
    /* Position query window over the calling window, ensuring it's within screen bounds. */
    this->left = Clamp(parent->left + (parent->width / 2) - (this->width / 2), 0, _screen.width - this->width);
    this->top = Clamp(parent->top + (parent->height / 2) - (this->height / 2), 0, _screen.height - this->height);
    this->SetDirty();
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_NAR_TEXT:
        SetDParamStr(0, this->server_connection_string);
        SetDParamStr(1, this->relay_connection_string);
        break;
    }
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_NAR_NO:
        _network_coordinator_client.ConnectFailure(this->token, 0);
        this->Close();
        break;
 
      case WID_NAR_YES_ONCE:
        _network_coordinator_client.StartTurnConnection(this->token);
        this->Close();
        break;
 
      case WID_NAR_YES_ALWAYS:
        _settings_client.network.use_relay_service = URS_ALLOW;
        _network_coordinator_client.StartTurnConnection(this->token);
        this->Close();
        break;
    }
  }
};
 
static const NWidgetPart _nested_network_ask_relay_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_RED),
    NWidget(WWT_CAPTION, COLOUR_RED, WID_NAR_CAPTION), SetDataTip(STR_NETWORK_ASK_RELAY_CAPTION, STR_NULL),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_RED), SetPIP(0, 0, 8),
    NWidget(WWT_TEXT, COLOUR_RED, WID_NAR_TEXT), SetAlignment(SA_HOR_CENTER), SetFill(1, 1),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(10, 15, 10),
      NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_NAR_NO), SetMinimalSize(71, 12), SetFill(1, 1), SetDataTip(STR_NETWORK_ASK_RELAY_NO, STR_NULL),
      NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_NAR_YES_ONCE), SetMinimalSize(71, 12), SetFill(1, 1), SetDataTip(STR_NETWORK_ASK_RELAY_YES_ONCE, STR_NULL),
      NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_NAR_YES_ALWAYS), SetMinimalSize(71, 12), SetFill(1, 1), SetDataTip(STR_NETWORK_ASK_RELAY_YES_ALWAYS, STR_NULL),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _network_ask_relay_desc(
  WDP_CENTER, nullptr, 0, 0,
  WC_NETWORK_ASK_RELAY, WC_NONE,
  WDF_MODAL,
  _nested_network_ask_relay_widgets, lengthof(_nested_network_ask_relay_widgets)
);
 
void ShowNetworkAskRelay(const std::string &server_connection_string, const std::string &relay_connection_string, const std::string &token)
{
  CloseWindowByClass(WC_NETWORK_ASK_RELAY);
 
  Window *parent = FindWindowById(WC_MAIN_WINDOW, 0);
  new NetworkAskRelayWindow(&_network_ask_relay_desc, parent, server_connection_string, relay_connection_string, token);
}