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 "../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 "network_survey.h"
#include "../gui.h"
#include "network_udp.h"
#include "../window_func.h"
#include "../gfx_func.h"
#include "../dropdown_type.h"
#include "../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 "../zoom_func.h"
#include "../sprite.h"
#include "../settings_internal.h"
#include "../company_cmd.h"
#include "../timer/timer.h"
#include "../timer/timer_window.h"
#include "../timer/timer_game_calendar.h"
#include "../textfile_gui.h"
#include "../stringfilter_type.h"
#include "../core/string_consumer.hpp"
 
#include "../widgets/network_widget.h"
 
#include "table/strings.h"
#include "../table/sprites.h"
 
#ifdef __EMSCRIPTEN__
# include <emscripten.h>
#endif
 
#include "../safeguards.h"
 
static void ShowNetworkStartServerWindow();
 
static ClientID _admin_client_id = INVALID_CLIENT_ID; 
static CompanyID _admin_company_id = CompanyID::Invalid(); 
 
void UpdateNetworkGameWindow()
{
  InvalidateWindowData(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME, 0);
}
void UpdateNetworkGameWindow() {…}
 
static DropDownList BuildVisibilityDropDownList()
{
  DropDownList list;
 
  list.push_back(MakeDropDownListStringItem(STR_NETWORK_SERVER_VISIBILITY_LOCAL, SERVER_GAME_TYPE_LOCAL));
  list.push_back(MakeDropDownListStringItem(STR_NETWORK_SERVER_VISIBILITY_INVITE_ONLY, SERVER_GAME_TYPE_INVITE_ONLY));
  list.push_back(MakeDropDownListStringItem(STR_NETWORK_SERVER_VISIBILITY_PUBLIC, SERVER_GAME_TYPE_PUBLIC));
 
  return list;
}
 
typedef GUIList<NetworkGame*, std::nullptr_t, 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; 
public:
  NWidgetServerListHeader() : NWidgetContainer(NWID_HORIZONTAL)
  {
    auto leaf = std::make_unique<NWidgetLeaf>(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_NAME, WidgetData{.string = STR_NETWORK_SERVER_LIST_GAME_NAME}, STR_NETWORK_SERVER_LIST_GAME_NAME_TOOLTIP);
    leaf->SetResize(1, 0);
    leaf->SetFill(1, 0);
    this->Add(std::move(leaf));
 
    this->Add(std::make_unique<NWidgetLeaf>(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_CLIENTS, WidgetData{.string = STR_NETWORK_SERVER_LIST_CLIENTS_CAPTION}, STR_NETWORK_SERVER_LIST_CLIENTS_CAPTION_TOOLTIP));
    this->Add(std::make_unique<NWidgetLeaf>(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_MAPSIZE, WidgetData{.string = STR_NETWORK_SERVER_LIST_MAP_SIZE_CAPTION}, STR_NETWORK_SERVER_LIST_MAP_SIZE_CAPTION_TOOLTIP));
    this->Add(std::make_unique<NWidgetLeaf>(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_DATE, WidgetData{.string = STR_NETWORK_SERVER_LIST_DATE_CAPTION}, STR_NETWORK_SERVER_LIST_DATE_CAPTION_TOOLTIP));
    this->Add(std::make_unique<NWidgetLeaf>(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_YEARS, WidgetData{.string = STR_NETWORK_SERVER_LIST_PLAY_TIME_CAPTION}, STR_NETWORK_SERVER_LIST_PLAY_TIME_CAPTION_TOOLTIP));
 
    leaf = std::make_unique<NWidgetLeaf>(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_INFO, WidgetData{.string = STR_EMPTY}, STR_NETWORK_SERVER_LIST_INFO_ICONS_TOOLTIP);
    leaf->SetFill(0, 1);
    this->Add(std::move(leaf));
  }
 
  void SetupSmallestSize(Window *w) override
  {
    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 (const auto &child_wid : this->children) {
      child_wid->SetupSmallestSize(w);
      this->smallest_y = std::max(this->smallest_y, child_wid->smallest_y + child_wid->padding.Vertical());
    }
 
    /* ... then in a second pass make sure the 'current' sizes are set. Won't change for most widgets. */
    for (const auto &child_wid : this->children) {
      child_wid->current_x = child_wid->smallest_x;
      child_wid->current_y = this->smallest_y;
    }
 
    this->smallest_x = this->children.front()->smallest_x + this->children.back()->smallest_x; // First and last are always shown, rest not
    this->ApplyAspectRatio();
  }
  void SetupSmallestSize(Window *w) override {…}
 
  void AssignSizePosition(SizingType sizing, int x, int 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->children.back()->smallest_x;
    /* The first and last widget are always visible, determine which other should be visible */
    if (this->children.size() > 2) {
      auto first = std::next(std::begin(this->children));
      auto last = std::prev(std::end(this->children));
      for (auto it = first; it != last; ++it) {
        auto &child_wid = *it;
        if (given_width > ScaleGUITrad(MINIMUM_NAME_WIDTH_BEFORE_NEW_HEADER) + child_wid->smallest_x && (*std::prev(it))->current_x != 0) {
          given_width -= child_wid->smallest_x;
          child_wid->current_x = child_wid->smallest_x; /* Make visible. */
        } else {
          child_wid->current_x = 0; /* Make invisible. */
        }
      }
    }
 
    /* All remaining space goes to the first (name) widget */
    this->children.front()->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.
    auto assign_position = [&](const std::unique_ptr<NWidgetBase> &child_wid) {
      if (child_wid->current_x != 0) {
        child_wid->AssignSizePosition(sizing, x + position, y, child_wid->current_x, this->current_y, rtl);
        position += child_wid->current_x;
      }
    };
 
    if (rtl) {
      std::for_each(std::rbegin(this->children), std::rend(this->children), assign_position);
    } else {
      std::for_each(std::begin(this->children), std::end(this->children), assign_position);
    }
  }
  void AssignSizePosition(SizingType sizing, int x, int y, uint given_width, uint given_height, bool rtl) override {…}
};
class NWidgetServerListHeader : public NWidgetContainer {…};
 
class NetworkGameWindow : public Window {
protected:
  /* Runtime saved values */
  static Listing last_sorting;
 
  /* Constants for sorting servers */
  static const std::initializer_list<GUIGameServerList::SortFunction * const> sorter_funcs;
  static const std::initializer_list<GUIGameServerList::FilterFunction * const> filter_funcs;
 
  NetworkGame *server = nullptr; 
  NetworkGame *last_joined = nullptr; 
  GUIGameServerList servers{}; 
  ServerListPosition list_pos = SLP_INVALID; 
  Scrollbar *vscroll = nullptr; 
  QueryString name_editbox; 
  QueryString filter_editbox; 
  bool searched_internet = false; 
 
  Dimension lock{}; 
  Dimension blot{}; 
 
  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 (const auto &ngl : _network_game_list) {
      this->servers.push_back(ngl.get());
      if (ngl.get() == this->server) {
        found_current_server = true;
      }
      if (ngl.get() == 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.GetText());
 
    if (!sf.IsEmpty()) {
      this->servers.SetFilterState(true);
      this->servers.Filter(sf);
    } else {
      this->servers.SetFilterState(false);
    }
 
    this->servers.RebuildDone();
    this->vscroll->SetCount(this->servers.size());
 
    /* Sort the list of network games as requested. */
    this->servers.Sort();
    this->UpdateListPos();
  }
  void BuildGUINetworkGameList() {…}
 
  static bool NGameNameSorter(NetworkGame * const &a, NetworkGame * const &b)
  {
    int r = StrNaturalCompare(a->info.server_name, b->info.server_name, true); // Sort by name (natural sorting).
    if (r == 0) r = a->connection_string.compare(b->connection_string);
 
    return r < 0;
  }
  static bool NGameNameSorter(NetworkGame * const &a, NetworkGame * const &b) {…}
 
  static bool NGameClientSorter(NetworkGame * const &a, NetworkGame * 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 NGameClientSorter(NetworkGame * const &a, NetworkGame * const &b) {…}
 
  static bool NGameMapSizeSorter(NetworkGame * const &a, NetworkGame * 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 NGameMapSizeSorter(NetworkGame * const &a, NetworkGame * const &b) {…}
 
  static bool NGameCalendarDateSorter(NetworkGame * const &a, NetworkGame * const &b)
  {
    auto r = a->info.calendar_date - b->info.calendar_date;
    return (r != 0) ? r < 0 : NGameClientSorter(a, b);
  }
  static bool NGameCalendarDateSorter(NetworkGame * const &a, NetworkGame * const &b) {…}
 
  static bool NGameTicksPlayingSorter(NetworkGame * const &a, NetworkGame * const &b)
  {
    if (a->info.ticks_playing == b->info.ticks_playing) {
      return NGameClientSorter(a, b);
    }
    return a->info.ticks_playing < b->info.ticks_playing;
  }
  static bool NGameTicksPlayingSorter(NetworkGame * const &a, NetworkGame * const &b) {…}
 
  static bool NGameAllowedSorter(NetworkGame * const &a, NetworkGame * 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);
  }
  static bool NGameAllowedSorter(NetworkGame * const &a, NetworkGame * const &b) {…}
 
  void SortNetworkGameList()
  {
    if (this->servers.Sort()) this->UpdateListPos();
  }
  void SortNetworkGameList() {…}
 
  void UpdateListPos()
  {
    auto it = std::ranges::find(this->servers, this->server);
    if (it == std::end(this->servers)) {
      this->list_pos = SLP_INVALID;
    } else {
      this->list_pos = static_cast<ServerListPosition>(std::distance(std::begin(this->servers), it));
    }
  }
  void UpdateListPos() {…}
 
  static bool NGameSearchFilter(NetworkGame * const *item, StringFilter &sf)
  {
    assert(item != nullptr);
    assert((*item) != nullptr);
 
    sf.ResetState();
    sf.AddLine((*item)->info.server_name);
    return sf.GetState();
  }
 
  void DrawServerLine(const NetworkGame *cur_item, int y, bool highlight) const
  {
    Rect name = this->GetWidget<NWidgetBase>(WID_NG_NAME)->GetCurrentRect();
    Rect info = this->GetWidget<NWidgetBase>(WID_NG_INFO)->GetCurrentRect();
 
    /* show highlighted item with a different colour */
    if (highlight) {
      Rect r = {std::min(name.left, info.left), y, std::max(name.right, info.right), y + (int)this->resize.step_height - 1};
      GfxFillRect(r.Shrink(WidgetDimensions::scaled.bevel), PC_GREY);
    }
 
    /* Offset to vertically position text. */
    int text_y_offset = WidgetDimensions::scaled.matrix.top + (this->resize.step_height - WidgetDimensions::scaled.matrix.Vertical() - GetCharacterHeight(FS_NORMAL)) / 2;
 
    info = info.Shrink(WidgetDimensions::scaled.framerect);
    name = name.Shrink(WidgetDimensions::scaled.framerect);
    DrawString(name.left, name.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) {
      if (const NWidgetBase *nwid = this->GetWidget<NWidgetBase>(WID_NG_CLIENTS); nwid->current_x != 0) {
        Rect clients = nwid->GetCurrentRect();
        DrawString(clients.left, clients.right, y + text_y_offset,
          GetString(STR_NETWORK_SERVER_LIST_GENERAL_ONLINE, cur_item->info.clients_on, cur_item->info.clients_max, cur_item->info.companies_on, cur_item->info.companies_max),
          TC_FROMSTRING, SA_HOR_CENTER);
      }
 
      if (const NWidgetBase *nwid = this->GetWidget<NWidgetBase>(WID_NG_MAPSIZE); nwid->current_x != 0) {
        /* map size */
        Rect mapsize = nwid->GetCurrentRect();
        DrawString(mapsize.left, mapsize.right, y + text_y_offset,
          GetString(STR_NETWORK_SERVER_LIST_MAP_SIZE_SHORT, cur_item->info.map_width, cur_item->info.map_height),
          TC_FROMSTRING, SA_HOR_CENTER);
      }
 
      if (const NWidgetBase *nwid = this->GetWidget<NWidgetBase>(WID_NG_DATE); nwid->current_x != 0) {
        /* current date */
        Rect date = nwid->GetCurrentRect();
        TimerGameCalendar::YearMonthDay ymd = TimerGameCalendar::ConvertDateToYMD(cur_item->info.calendar_date);
        DrawString(date.left, date.right, y + text_y_offset,
          GetString(STR_JUST_INT, ymd.year),
          TC_BLACK, SA_HOR_CENTER);
      }
 
      if (const NWidgetBase *nwid = this->GetWidget<NWidgetBase>(WID_NG_YEARS); nwid->current_x != 0) {
        /* play time */
        Rect years = nwid->GetCurrentRect();
        const auto play_time = cur_item->info.ticks_playing / Ticks::TICKS_PER_SECOND;
        DrawString(years.left, years.right, y + text_y_offset,
          GetString(STR_NETWORK_SERVER_LIST_PLAY_TIME_SHORT, play_time / 60 / 60, (play_time / 60) % 60),
          TC_BLACK, SA_HOR_CENTER);
      }
 
      /* Set top and bottom of info rect to current row. */
      info.top = y;
      info.bottom = y + this->resize.step_height - 1;
 
      bool rtl = _current_text_dir == TD_RTL;
 
      /* draw a lock if the server is password protected */
      if (cur_item->info.use_password) DrawSpriteIgnorePadding(SPR_LOCK, PAL_NONE, info.WithWidth(this->lock.width, rtl), SA_CENTER);
 
      /* draw red or green icon, depending on compatibility with server */
      PaletteID pal = cur_item->info.compatible ? PALETTE_TO_GREEN : (cur_item->info.version_compatible ? PALETTE_TO_YELLOW : PALETTE_TO_RED);
      DrawSpriteIgnorePadding(SPR_BLOT, pal, info.WithWidth(this->blot.width, !rtl), SA_CENTER);
    }
  }
  void DrawServerLine(const NetworkGame *cur_item, int y, bool highlight) const {…}
 
  void ScrollToSelectedServer()
  {
    if (this->list_pos == SLP_INVALID) return; // no server selected
    this->vscroll->ScrollTowards(this->list_pos);
  }
  void ScrollToSelectedServer() {…}
 
public:
  NetworkGameWindow(WindowDesc &desc) : Window(desc), name_editbox(NETWORK_CLIENT_NAME_LENGTH), filter_editbox(120)
  {
    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);
 
    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->servers.SetListing(this->last_sorting);
    this->servers.SetSortFuncs(NetworkGameWindow::sorter_funcs);
    this->servers.SetFilterFuncs(NetworkGameWindow::filter_funcs);
    this->servers.ForceRebuild();
  }
 
  ~NetworkGameWindow()
  {
    this->last_sorting = this->servers.GetListing();
  }
 
  void OnInit() override
  {
    this->lock = GetScaledSpriteSize(SPR_LOCK);
    this->blot = GetScaledSpriteSize(SPR_BLOT);
  }
  void OnInit() override {…}
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    switch (widget) {
      case WID_NG_MATRIX:
        fill.height = resize.height = std::max(GetSpriteSize(SPR_BLOT).height, (uint)GetCharacterHeight(FS_NORMAL)) + padding.height;
        size.height = 12 * resize.height;
        break;
 
      case WID_NG_LASTJOINED:
        size.height = std::max(GetSpriteSize(SPR_BLOT).height, (uint)GetCharacterHeight(FS_NORMAL)) + WidgetDimensions::scaled.matrix.Vertical();
        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
        auto max_clients = GetParamMaxValue(MAX_CLIENTS);
        auto max_companies = GetParamMaxValue(MAX_COMPANIES);
        size = maxdim(size, GetStringBoundingBox(GetString(STR_NETWORK_SERVER_LIST_GENERAL_ONLINE, max_clients, max_clients, max_companies, max_companies)));
        break;
      }
 
      case WID_NG_MAPSIZE: {
        size.width += 2 * Window::SortButtonWidth(); // Make space for the arrow
        auto max_map_size = GetParamMaxValue(MAX_MAP_SIZE);
        size = maxdim(size, GetStringBoundingBox(GetString(STR_NETWORK_SERVER_LIST_MAP_SIZE_SHORT, max_map_size, max_map_size)));
        break;
      }
 
      case WID_NG_DATE:
      case WID_NG_YEARS:
        size.width += 2 * Window::SortButtonWidth(); // Make space for the arrow
        size = maxdim(size, GetStringBoundingBox(GetString(STR_JUST_INT, GetParamMaxValue(5))));
        break;
 
      case WID_NG_INFO:
        size.width = this->lock.width + WidgetDimensions::scaled.hsep_normal + this->blot.width + padding.width;
        size.height = std::max(this->lock.height, this->blot.height) + padding.height;
        break;
    }
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    switch (widget) {
      case WID_NG_MATRIX: {
        uint16_t y = r.top;
 
        auto [first, last] = this->vscroll->GetVisibleRangeIterators(this->servers);
        for (auto it = first; it != last; ++it) {
          const NetworkGame *ngl = *it;
          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 DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
 
  void OnPaint() override
  {
    if (this->servers.NeedRebuild()) {
      this->BuildGUINetworkGameList();
    }
    if (this->servers.NeedResort()) {
      this->SortNetworkGameList();
    }
 
    NetworkGame *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 */
    bool changed = false;
    changed |= this->GetWidget<NWidgetStacked>(WID_NG_NEWGRF_SEL)->SetDisplayedPlane(sel == nullptr || sel->status != NGLS_ONLINE || sel->info.grfconfig.empty() ? SZSP_NONE : 0);
    changed |= this->GetWidget<NWidgetStacked>(WID_NG_NEWGRF_MISSING_SEL)->SetDisplayedPlane(sel == nullptr || sel->status != NGLS_ONLINE || sel->info.grfconfig.empty() || !sel->info.version_compatible || sel->info.compatible ? SZSP_NONE : 0);
    if (changed) {
      this->ReInit();
      return;
    }
 
#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 OnPaint() override {…}
 
  StringID GetHeaderString() const
  {
    if (this->server == nullptr) return STR_NETWORK_SERVER_LIST_GAME_INFO;
    switch (this->server->status) {
      case NGLS_OFFLINE: return STR_NETWORK_SERVER_LIST_SERVER_OFFLINE;
      case NGLS_ONLINE: return STR_NETWORK_SERVER_LIST_GAME_INFO;
      case NGLS_FULL: return STR_NETWORK_SERVER_LIST_SERVER_FULL;
      case NGLS_BANNED: return STR_NETWORK_SERVER_LIST_SERVER_BANNED;
      case NGLS_TOO_OLD: return STR_NETWORK_SERVER_LIST_SERVER_TOO_OLD;
      default: NOT_REACHED();
    }
  }
 
  void DrawDetails(const Rect &r) const
  {
    NetworkGame *sel = this->server;
 
    Rect tr = r.Shrink(WidgetDimensions::scaled.frametext);
    StringID header_msg = this->GetHeaderString();
    int header_height = GetStringHeight(header_msg, tr.Width()) +
        (sel == nullptr ? 0 : GetStringHeight(sel->info.server_name, tr.Width())) +
        WidgetDimensions::scaled.frametext.Vertical();
 
    /* Height for the title banner */
    Rect hr = r.WithHeight(header_height).Shrink(WidgetDimensions::scaled.frametext);
    tr.top += header_height;
 
    /* Draw the right menu */
    /* Create the nice darker rectangle at the details top */
    GfxFillRect(r.WithHeight(header_height).Shrink(WidgetDimensions::scaled.bevel), GetColourGradient(COLOUR_LIGHT_BLUE, SHADE_NORMAL));
    hr.top = DrawStringMultiLine(hr, header_msg, TC_FROMSTRING, SA_HOR_CENTER);
    if (sel == nullptr) return;
 
    hr.top = DrawStringMultiLine(hr, sel->info.server_name, TC_ORANGE, SA_HOR_CENTER); // game name
    if (sel->status != NGLS_ONLINE) {
      tr.top = DrawStringMultiLine(tr, header_msg, TC_FROMSTRING, SA_HOR_CENTER);
    } else { // show game info
      tr.top = DrawStringMultiLine(tr, GetString(STR_NETWORK_SERVER_LIST_CLIENTS, sel->info.clients_on, sel->info.clients_max, sel->info.companies_on, sel->info.companies_max));
 
      tr.top = DrawStringMultiLine(tr, GetString(STR_NETWORK_SERVER_LIST_LANDSCAPE, STR_CLIMATE_TEMPERATE_LANDSCAPE + to_underlying(sel->info.landscape))); // landscape
 
      tr.top = DrawStringMultiLine(tr, GetString(STR_NETWORK_SERVER_LIST_MAP_SIZE, sel->info.map_width, sel->info.map_height)); // map size
 
      tr.top = DrawStringMultiLine(tr, GetString(STR_NETWORK_SERVER_LIST_SERVER_VERSION, sel->info.server_revision)); // server version
 
      StringID invite_or_address = sel->connection_string.starts_with("+") ? STR_NETWORK_SERVER_LIST_INVITE_CODE : STR_NETWORK_SERVER_LIST_SERVER_ADDRESS;
      tr.top = DrawStringMultiLine(tr, GetString(invite_or_address, sel->connection_string)); // server address / invite code
 
      tr.top = DrawStringMultiLine(tr, GetString(STR_NETWORK_SERVER_LIST_START_DATE, sel->info.calendar_start)); // start date
 
      tr.top = DrawStringMultiLine(tr, GetString(STR_NETWORK_SERVER_LIST_CURRENT_DATE, sel->info.calendar_date)); // current date
 
      const auto play_time = sel->info.ticks_playing / Ticks::TICKS_PER_SECOND;
      tr.top = DrawStringMultiLine(tr, GetString(STR_NETWORK_SERVER_LIST_PLAY_TIME, play_time / 60 / 60, (play_time / 60) % 60)); // play time
 
      if (sel->info.gamescript_version != -1) {
        tr.top = DrawStringMultiLine(tr, GetString(STR_NETWORK_SERVER_LIST_GAMESCRIPT, sel->info.gamescript_name, sel->info.gamescript_version)); // gamescript name and version
      }
 
      tr.top += WidgetDimensions::scaled.vsep_wide;
 
      if (!sel->info.compatible) {
        DrawStringMultiLine(tr, 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 */
        DrawStringMultiLine(tr, STR_NETWORK_SERVER_LIST_SERVER_FULL, TC_FROMSTRING, SA_HOR_CENTER); // server full
      } else if (sel->info.use_password) {
        DrawStringMultiLine(tr, STR_NETWORK_SERVER_LIST_PASSWORD, TC_FROMSTRING, SA_HOR_CENTER); // password warning
      }
    }
  }
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      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
        auto it = this->vscroll->GetScrolledItemFromWidget(this->servers, pt.y, this, WID_NG_MATRIX);
        this->server = (it != this->servers.end()) ? *it : nullptr;
        this->list_pos = (server == nullptr) ? SLP_INVALID : it - this->servers.begin();
        this->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();
 
          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
        ShowQueryString(
          _settings_client.network.connect_to_ip,
          STR_NETWORK_SERVER_LIST_ENTER_SERVER_ADDRESS,
          NETWORK_HOSTNAME_PORT_LENGTH,  // maximum number of characters including '\0'
          this, CS_ALPHANUMERAL, QueryStringFlag::AcceptUnchanged);
        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 OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
 
  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
  {
    this->servers.ForceRebuild();
    this->SetDirty();
  }
  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override {…}
 
  EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t 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;
  }
  EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override {…}
 
  void OnEditboxChanged(WidgetID 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.GetText();
        break;
    }
  }
  void OnEditboxChanged(WidgetID wid) override {…}
 
  void OnQueryTextFinished(std::optional<std::string> str) override
  {
    if (!str.has_value() || str->empty()) return;
 
    _settings_client.network.connect_to_ip = std::move(*str);
    NetworkAddServer(_settings_client.network.connect_to_ip);
    NetworkRebuildHostList();
  }
  void OnQueryTextFinished(std::optional<std::string> str) override {…}
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_NG_MATRIX);
  }
  void OnResize() override {…}
 
  const IntervalTimer<TimerWindow> refresh_interval = {std::chrono::seconds(30), [this](uint) {
    if (!this->searched_internet) return;
 
    _network_coordinator_client.GetListing();
  }};
  const IntervalTimer<TimerWindow> refresh_interval = {std::chrono::seconds(30), [this](uint) {…};
};
class NetworkGameWindow : public Window {…};
 
Listing NetworkGameWindow::last_sorting = {false, 5};
const std::initializer_list<GUIGameServerList::SortFunction * const> NetworkGameWindow::sorter_funcs = {
  &NGameNameSorter,
  &NGameClientSorter,
  &NGameMapSizeSorter,
  &NGameCalendarDateSorter,
  &NGameTicksPlayingSorter,
  &NGameAllowedSorter
};
 
const std::initializer_list<GUIGameServerList::FilterFunction * const> NetworkGameWindow::filter_funcs = {
  &NGameSearchFilter
};
 
static std::unique_ptr<NWidgetBase> MakeResizableHeader()
{
  return std::make_unique<NWidgetServerListHeader>();
}
 
static constexpr NWidgetPart _nested_network_game_widgets[] = {
  /* TOP */
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_LIGHT_BLUE),
    NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetStringTip(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(0, WidgetDimensions::unscaled.vsep_wide, 0), SetPadding(WidgetDimensions::unscaled.sparse_resize),
      NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
        /* LEFT SIDE */
        NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
            NWidget(WWT_TEXT, INVALID_COLOUR, WID_NG_FILTER_LABEL), SetStringTip(STR_LIST_FILTER_TITLE),
            NWidget(WWT_EDITBOX, COLOUR_LIGHT_BLUE, WID_NG_FILTER), SetMinimalSize(251, 0), SetFill(1, 0), SetResize(1, 0),
                      SetStringTip(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, INVALID_COLOUR, WID_NG_LASTJOINED_LABEL), SetFill(1, 0),
                      SetStringTip(STR_NETWORK_SERVER_LIST_LAST_JOINED_SERVER), SetResize(1, 0),
            NWidget(NWID_HORIZONTAL),
              NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, WID_NG_LASTJOINED), SetFill(1, 0), SetResize(1, 0),
                        SetToolTip(STR_NETWORK_SERVER_LIST_CLICK_TO_SELECT_LAST_TOOLTIP),
              EndContainer(),
              NWidget(WWT_EMPTY, INVALID_COLOUR, WID_NG_LASTJOINED_SPACER), SetFill(0, 0),
            EndContainer(),
          EndContainer(),
        EndContainer(),
        /* RIGHT SIDE */
        NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
            NWidget(WWT_TEXT, INVALID_COLOUR, WID_NG_CLIENT_LABEL), SetStringTip(STR_NETWORK_SERVER_LIST_PLAYER_NAME),
            NWidget(WWT_EDITBOX, COLOUR_LIGHT_BLUE, WID_NG_CLIENT), SetMinimalSize(151, 0), SetFill(1, 0), SetResize(1, 0),
                      SetStringTip(STR_NETWORK_SERVER_LIST_PLAYER_NAME_OSKTITLE, STR_NETWORK_SERVER_LIST_ENTER_NAME_TOOLTIP),
          EndContainer(),
          NWidget(NWID_VERTICAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
            NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, WID_NG_DETAILS), SetMinimalSize(140, 0), SetMinimalTextLines(15, 0), SetResize(0, 1),
            EndContainer(),
            NWidget(NWID_VERTICAL, NWidContainerFlag::EqualSize),
              NWidget(NWID_SELECTION, INVALID_COLOUR, WID_NG_NEWGRF_MISSING_SEL),
                NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_NEWGRF_MISSING), SetFill(1, 0), SetStringTip(STR_NEWGRF_SETTINGS_FIND_MISSING_CONTENT_BUTTON, STR_NEWGRF_SETTINGS_FIND_MISSING_CONTENT_TOOLTIP),
              EndContainer(),
              NWidget(NWID_SELECTION, INVALID_COLOUR, WID_NG_NEWGRF_SEL),
                NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_NEWGRF), SetFill(1, 0), SetStringTip(STR_MAPGEN_NEWGRF_SETTINGS, STR_MAPGEN_NEWGRF_SETTINGS_TOOLTIP),
              EndContainer(),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
                NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_JOIN), SetFill(1, 0), SetStringTip(STR_NETWORK_SERVER_LIST_JOIN_GAME),
                NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_REFRESH), SetFill(1, 0), SetStringTip(STR_NETWORK_SERVER_LIST_REFRESH, STR_NETWORK_SERVER_LIST_REFRESH_TOOLTIP),
              EndContainer(),
            EndContainer(),
          EndContainer(),
        EndContainer(),
      EndContainer(),
      /* BOTTOM */
      NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
        NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NG_SEARCH_INTERNET), SetResize(1, 0), SetFill(1, 0), SetStringTip(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), SetStringTip(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), SetStringTip(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), SetStringTip(STR_NETWORK_SERVER_LIST_START_SERVER, STR_NETWORK_SERVER_LIST_START_SERVER_TOOLTIP),
      EndContainer(),
    EndContainer(),
    /* Resize button. */
    NWidget(NWID_HORIZONTAL),
      NWidget(NWID_SPACER), SetFill(1, 0), SetResize(1, 0),
      NWidget(WWT_RESIZEBOX, COLOUR_LIGHT_BLUE), SetResizeWidgetTypeTip(RWV_HIDE_BEVEL, STR_TOOLTIP_RESIZE),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _network_game_window_desc(
  WDP_CENTER, "list_servers", 1000, 730,
  WC_NETWORK_WINDOW, WC_NONE,
  {},
  _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 {
  WidgetID 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);
 
    this->SetFocusedWidget(WID_NSS_GAMENAME);
  }
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    switch (widget) {
      case WID_NSS_CONNTYPE_BTN:
        return GetString(STR_NETWORK_SERVER_VISIBILITY_LOCAL + _settings_client.network.server_game_type);
 
      case WID_NSS_CLIENTS_TXT:
        return GetString(STR_NETWORK_START_SERVER_CLIENTS_SELECT, _settings_client.network.max_clients);
 
      case WID_NSS_COMPANIES_TXT:
        return GetString(STR_NETWORK_START_SERVER_COMPANIES_SELECT, _settings_client.network.max_companies);
 
      default:
        return this->Window::GetWidgetString(widget, stringid);
    }
  }
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override {…}
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] 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 UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void DrawWidget(const Rect &r, WidgetID 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 + WidgetDimensions::scaled.framerect.left, this->width - WidgetDimensions::scaled.framerect.right, r.top, "*", TC_RED);
    }
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] 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;
        ShowQueryString(_settings_client.network.server_password, STR_NETWORK_START_SERVER_SET_PASSWORD, NETWORK_PASSWORD_LENGTH, this, CS_ALPHANUMERAL, {});
        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.Test(WindowFlag::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;
        ShowQueryString(GetString(STR_JUST_INT, _settings_client.network.max_clients), STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS,    4, this, CS_NUMERAL, {});
        break;
 
      case WID_NSS_COMPANIES_TXT:  // Click on number of companies
        this->widget_id = WID_NSS_COMPANIES_TXT;
        ShowQueryString(GetString(STR_JUST_INT, _settings_client.network.max_companies), STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES,  3, this, CS_NUMERAL, {});
        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 OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
 
  void OnDropdownSelect(WidgetID widget, int index, int) override
  {
    switch (widget) {
      case WID_NSS_CONNTYPE_BTN:
        _settings_client.network.server_game_type = (ServerGameType)index;
        break;
      default:
        NOT_REACHED();
    }
 
    this->SetDirty();
  }
  void OnDropdownSelect(WidgetID widget, int index, int) override {…}
 
  bool CheckServerName()
  {
    std::string str{this->name_editbox.text.GetText()};
    if (!NetworkValidateServerName(str)) return false;
 
    SetSettingValue(GetSettingFromName("network.server_name")->AsStringSetting(), std::move(str));
    return true;
  }
 
  void OnTimeout() override
  {
    this->RaiseWidgetsWhenLowered(WID_NSS_CLIENTS_BTND, WID_NSS_CLIENTS_BTNU, WID_NSS_COMPANIES_BTND, WID_NSS_COMPANIES_BTNU);
  }
  void OnTimeout() override {…}
 
  void OnQueryTextFinished(std::optional<std::string> str) override
  {
    if (!str.has_value()) return;
 
    if (this->widget_id == WID_NSS_SETPWD) {
      _settings_client.network.server_password = std::move(*str);
    } else {
      auto value = ParseInteger<int32_t>(*str, 10, true);
      if (!value.has_value()) return;
      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();
  }
  void OnQueryTextFinished(std::optional<std::string> str) override {…}
};
struct NetworkStartServerWindow : public Window {…};
 
static constexpr NWidgetPart _nested_network_start_server_window_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_LIGHT_BLUE),
    NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetStringTip(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(0, WidgetDimensions::unscaled.vsep_wide, 0), SetPadding(WidgetDimensions::unscaled.sparse),
      NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
        NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
          /* Game name widgets */
          NWidget(WWT_TEXT, INVALID_COLOUR, WID_NSS_GAMENAME_LABEL), SetFill(1, 0), SetStringTip(STR_NETWORK_START_SERVER_NEW_GAME_NAME),
          NWidget(WWT_EDITBOX, COLOUR_LIGHT_BLUE, WID_NSS_GAMENAME), SetFill(1, 0), SetStringTip(STR_NETWORK_START_SERVER_NEW_GAME_NAME_OSKTITLE, STR_NETWORK_START_SERVER_NEW_GAME_NAME_TOOLTIP),
        EndContainer(),
 
        NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
            NWidget(WWT_TEXT, INVALID_COLOUR, WID_NSS_CONNTYPE_LABEL), SetFill(1, 0), SetStringTip(STR_NETWORK_START_SERVER_VISIBILITY_LABEL),
            NWidget(WWT_DROPDOWN, COLOUR_LIGHT_BLUE, WID_NSS_CONNTYPE_BTN), SetFill(1, 0), SetToolTip(STR_NETWORK_START_SERVER_VISIBILITY_TOOLTIP),
          EndContainer(),
          NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
            NWidget(NWID_SPACER), SetFill(1, 1),
            NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_SETPWD), SetFill(1, 0), SetStringTip(STR_NETWORK_START_SERVER_SET_PASSWORD, STR_NETWORK_START_SERVER_PASSWORD_TOOLTIP),
          EndContainer(),
        EndContainer(),
 
        NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
            NWidget(WWT_TEXT, INVALID_COLOUR, WID_NSS_CLIENTS_LABEL), SetFill(1, 0), SetStringTip(STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS),
            NWidget(NWID_HORIZONTAL),
              NWidget(WWT_IMGBTN, COLOUR_LIGHT_BLUE, WID_NSS_CLIENTS_BTND), SetAspect(WidgetDimensions::ASPECT_UP_DOWN_BUTTON), SetFill(0, 1), SetSpriteTip(SPR_ARROW_DOWN, STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS_TOOLTIP),
              NWidget(WWT_PUSHTXTBTN, COLOUR_LIGHT_BLUE, WID_NSS_CLIENTS_TXT), SetFill(1, 0), SetToolTip(STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS_TOOLTIP),
              NWidget(WWT_IMGBTN, COLOUR_LIGHT_BLUE, WID_NSS_CLIENTS_BTNU), SetAspect(WidgetDimensions::ASPECT_UP_DOWN_BUTTON), SetFill(0, 1), SetSpriteTip(SPR_ARROW_UP, STR_NETWORK_START_SERVER_NUMBER_OF_CLIENTS_TOOLTIP),
            EndContainer(),
          EndContainer(),
 
          NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
            NWidget(WWT_TEXT, INVALID_COLOUR, WID_NSS_COMPANIES_LABEL), SetFill(1, 0), SetStringTip(STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES),
            NWidget(NWID_HORIZONTAL),
              NWidget(WWT_IMGBTN, COLOUR_LIGHT_BLUE, WID_NSS_COMPANIES_BTND), SetAspect(WidgetDimensions::ASPECT_UP_DOWN_BUTTON), SetFill(0, 1), SetSpriteTip(SPR_ARROW_DOWN, STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES_TOOLTIP),
              NWidget(WWT_PUSHTXTBTN, COLOUR_LIGHT_BLUE, WID_NSS_COMPANIES_TXT), SetFill(1, 0), SetToolTip(STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES_TOOLTIP),
              NWidget(WWT_IMGBTN, COLOUR_LIGHT_BLUE, WID_NSS_COMPANIES_BTNU), SetAspect(WidgetDimensions::ASPECT_UP_DOWN_BUTTON), SetFill(0, 1), SetSpriteTip(SPR_ARROW_UP, STR_NETWORK_START_SERVER_NUMBER_OF_COMPANIES_TOOLTIP),
            EndContainer(),
          EndContainer(),
        EndContainer(),
      EndContainer(),
 
      NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
        /* 'generate game' and 'load game' buttons */
        NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_GENERATE_GAME), SetStringTip(STR_INTRO_NEW_GAME, STR_INTRO_TOOLTIP_NEW_GAME), SetFill(1, 0),
          NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_LOAD_GAME), SetStringTip(STR_INTRO_LOAD_GAME, STR_INTRO_TOOLTIP_LOAD_GAME), SetFill(1, 0),
        EndContainer(),
 
        /* 'play scenario' and 'play heightmap' buttons */
        NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_PLAY_SCENARIO), SetStringTip(STR_INTRO_PLAY_SCENARIO, STR_INTRO_TOOLTIP_PLAY_SCENARIO), SetFill(1, 0),
          NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_PLAY_HEIGHTMAP), SetStringTip(STR_INTRO_PLAY_HEIGHTMAP, STR_INTRO_TOOLTIP_PLAY_HEIGHTMAP), SetFill(1, 0),
        EndContainer(),
      EndContainer(),
 
      NWidget(NWID_HORIZONTAL), SetPIPRatio(1, 0, 1),
        NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NSS_CANCEL), SetStringTip(STR_BUTTON_CANCEL), SetMinimalSize(128, 12),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _network_start_server_window_desc(
  WDP_CENTER, {}, 0, 0,
  WC_NETWORK_WINDOW, WC_NONE,
  {},
  _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 constexpr NWidgetPart _nested_client_list_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY), SetStringTip(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(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0), SetPadding(4),
      NWidget(WWT_FRAME, COLOUR_GREY), SetStringTip(STR_NETWORK_CLIENT_LIST_SERVER), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
        NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
          NWidget(WWT_TEXT, INVALID_COLOUR), SetStringTip(STR_NETWORK_CLIENT_LIST_SERVER_NAME),
          NWidget(WWT_TEXT, INVALID_COLOUR, WID_CL_SERVER_NAME), SetFill(1, 0), SetResize(1, 0), SetToolTip(STR_NETWORK_CLIENT_LIST_SERVER_NAME_TOOLTIP), SetAlignment(SA_VERT_CENTER | SA_RIGHT),
          NWidget(WWT_PUSHIMGBTN, COLOUR_GREY, WID_CL_SERVER_NAME_EDIT), SetAspect(WidgetDimensions::ASPECT_RENAME), SetSpriteTip(SPR_RENAME, STR_NETWORK_CLIENT_LIST_SERVER_NAME_EDIT_TOOLTIP),
        EndContainer(),
        NWidget(NWID_SELECTION, INVALID_COLOUR, WID_CL_SERVER_SELECTOR),
          NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, INVALID_COLOUR), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_NETWORK_CLIENT_LIST_SERVER_VISIBILITY),
              NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_CL_SERVER_VISIBILITY), SetToolTip(STR_NETWORK_CLIENT_LIST_SERVER_VISIBILITY_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, INVALID_COLOUR), SetStringTip(STR_NETWORK_CLIENT_LIST_SERVER_INVITE_CODE),
              NWidget(WWT_TEXT, INVALID_COLOUR, WID_CL_SERVER_INVITE_CODE), SetFill(1, 0), SetResize(1, 0), SetToolTip(STR_NETWORK_CLIENT_LIST_SERVER_INVITE_CODE_TOOLTIP), SetAlignment(SA_VERT_CENTER | SA_RIGHT),
            EndContainer(),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, INVALID_COLOUR), SetStringTip(STR_NETWORK_CLIENT_LIST_SERVER_CONNECTION_TYPE),
              NWidget(WWT_TEXT, INVALID_COLOUR, WID_CL_SERVER_CONNECTION_TYPE), SetFill(1, 0), SetResize(1, 0), SetToolTip(STR_NETWORK_CLIENT_LIST_SERVER_CONNECTION_TYPE_TOOLTIP), SetAlignment(SA_VERT_CENTER | SA_RIGHT),
            EndContainer(),
          EndContainer(),
        EndContainer(),
      EndContainer(),
      NWidget(WWT_FRAME, COLOUR_GREY), SetStringTip(STR_NETWORK_CLIENT_LIST_PLAYER),
        NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
          NWidget(WWT_TEXT, INVALID_COLOUR), SetStringTip(STR_NETWORK_CLIENT_LIST_PLAYER_NAME),
          NWidget(WWT_TEXT, INVALID_COLOUR, WID_CL_CLIENT_NAME), SetFill(1, 0), SetResize(1, 0), SetToolTip(STR_NETWORK_CLIENT_LIST_PLAYER_NAME_TOOLTIP), SetAlignment(SA_VERT_CENTER | SA_RIGHT),
          NWidget(WWT_PUSHIMGBTN, COLOUR_GREY, WID_CL_CLIENT_NAME_EDIT), SetAspect(WidgetDimensions::ASPECT_RENAME), SetSpriteTip(SPR_RENAME, STR_NETWORK_CLIENT_LIST_PLAYER_NAME_EDIT_TOOLTIP),
        EndContainer(),
      EndContainer(),
    EndContainer(),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_MATRIX, COLOUR_GREY, WID_CL_MATRIX), SetMinimalSize(180, 0), SetResize(1, 1), SetFill(1, 1), SetMatrixDataTip(1, 0), SetScrollbar(WID_CL_SCROLLBAR),
    NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_CL_SCROLLBAR),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_PANEL, COLOUR_GREY),
      NWidget(WWT_TEXT, INVALID_COLOUR, WID_CL_CLIENT_COMPANY_COUNT), SetFill(1, 0), SetResize(1, 0), SetPadding(WidgetDimensions::unscaled.framerect), SetAlignment(SA_CENTER), SetToolTip(STR_NETWORK_CLIENT_LIST_CLIENT_COMPANY_COUNT_TOOLTIP),
    EndContainer(),
    NWidget(WWT_RESIZEBOX, COLOUR_GREY),
  EndContainer(),
};
 
static WindowDesc _client_list_desc(
  WDP_AUTO, "list_clients", 220, 300,
  WC_CLIENT_LIST, WC_NONE,
  {},
  _nested_client_list_widgets
);
 
enum DropDownAdmin : uint8_t {
  DD_CLIENT_ADMIN_KICK,
  DD_CLIENT_ADMIN_BAN,
  DD_COMPANY_ADMIN_RESET,
};
enum DropDownAdmin : uint8_t {…};
 
static void AdminClientKickCallback(Window *, bool confirmed)
{
  if (confirmed) NetworkServerKickClient(_admin_client_id, {});
}
static void AdminClientKickCallback(Window *, bool confirmed) {…}
 
static void AdminClientBanCallback(Window *, bool confirmed)
{
  if (confirmed) NetworkServerKickOrBanIP(_admin_client_id, true, {});
}
static void AdminClientBanCallback(Window *, bool confirmed) {…}
 
static void AdminCompanyResetCallback(Window *, bool confirmed)
{
  if (confirmed) {
    if (NetworkCompanyHasClients(_admin_company_id)) return;
    Command<CMD_COMPANY_CTRL>::Post(CCA_DELETE, _admin_company_id, CRR_MANUAL, INVALID_CLIENT_ID);
  }
}
static void AdminCompanyResetCallback(Window *, bool confirmed) {…}
 
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 + WidgetDimensions::scaled.framerect.Vertical();
    this->width = d.width + WidgetDimensions::scaled.framerect.Horizontal();
  }
  virtual ~ButtonCommon() = default;
 
  virtual void OnClick(struct NetworkClientListWindow *w, Point pt) = 0;
};
class ButtonCommon {…};
 
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);
  }
  void OnClick(struct NetworkClientListWindow *w, Point pt) override {…}
};
class Button : public ButtonCommon {…};
 
using CompanyButton = Button<CompanyID>;
using ClientButton = Button<ClientID>;
 
struct NetworkClientListWindow : Window {
private:
  ClientListWidgets query_widget{}; 
 
  ClientID dd_client_id{}; 
  CompanyID dd_company_id = CompanyID::Invalid(); 
 
  Scrollbar *vscroll = nullptr; 
  uint line_height = 0; 
  uint line_count = 0; 
  int hover_index = -1; 
  int player_self_index = -1; 
  int player_host_index = -1; 
 
  std::map<uint, std::vector<std::unique_ptr<ButtonCommon>>> buttons{}; 
 
  static void OnClickCompanyChat([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID company_id)
  {
    ShowNetworkChatQueryWindow(DESTTYPE_TEAM, company_id.base());
  }
  static void OnClickCompanyChat([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID company_id) {…}
 
  static void OnClickCompanyJoin([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID company_id)
  {
    if (_network_server) {
      NetworkServerDoMove(CLIENT_ID_SERVER, company_id);
      MarkWholeScreenDirty();
    } else {
      NetworkClientRequestMove(company_id);
    }
  }
  static void OnClickCompanyJoin([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID company_id) {…}
 
  static void OnClickCompanyNew([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID)
  {
    Command<CMD_COMPANY_CTRL>::Post(CCA_NEW, CompanyID::Invalid(), CRR_NONE, _network_own_client_id);
  }
  static void OnClickCompanyNew([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID) {…}
 
  static void OnClickClientAdmin([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, ClientID client_id)
  {
    DropDownList list;
    list.push_back(MakeDropDownListStringItem(STR_NETWORK_CLIENT_LIST_ADMIN_CLIENT_KICK, DD_CLIENT_ADMIN_KICK));
    list.push_back(MakeDropDownListStringItem(STR_NETWORK_CLIENT_LIST_ADMIN_CLIENT_BAN, DD_CLIENT_ADMIN_BAN));
 
    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);
  }
  static void OnClickClientAdmin([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, ClientID client_id) {…}
 
  static void OnClickCompanyAdmin([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID company_id)
  {
    DropDownList list;
    list.push_back(MakeDropDownListStringItem(STR_NETWORK_CLIENT_LIST_ADMIN_COMPANY_RESET, DD_COMPANY_ADMIN_RESET, NetworkCompanyHasClients(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);
  }
  static void OnClickCompanyAdmin([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID company_id) {…}
  static void OnClickClientChat([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, ClientID client_id)
  {
    ShowNetworkChatQueryWindow(DESTTYPE_CLIENT, client_id);
  }
  static void OnClickClientChat([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, ClientID client_id) {…}
 
  static void OnClickClientAuthorize([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, ClientID client_id)
  {
    AutoRestoreBackup<CompanyID> cur_company(_current_company, NetworkClientInfo::GetByClientID(_network_own_client_id)->client_playas);
    Command<CMD_COMPANY_ALLOW_LIST_CTRL>::Post(CALCA_ADD, NetworkClientInfo::GetByClientID(client_id)->public_key);
  }
 
  void RebuildListCompany(CompanyID company_id, CompanyID client_playas, bool can_join_company)
  {
    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].push_back(std::make_unique<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 (can_join_company) this->buttons[line_count].push_back(std::make_unique<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].push_back(std::make_unique<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].push_back(std::make_unique<ClientButton>(SPR_CHAT, STR_NETWORK_CLIENT_LIST_CHAT_CLIENT_TOOLTIP, COLOUR_ORANGE, ci->client_id, &NetworkClientListWindow::OnClickClientChat));
      if (_network_own_client_id != ci->client_id && client_playas != COMPANY_SPECTATOR && !ci->CanJoinCompany(client_playas)) this->buttons[line_count].push_back(std::make_unique<ClientButton>(SPR_JOIN, STR_NETWORK_CLIENT_LIST_COMPANY_AUTHORIZE_TOOLTIP, COLOUR_GREEN, ci->client_id, &NetworkClientListWindow::OnClickClientAuthorize));
 
      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 RebuildListCompany(CompanyID company_id, CompanyID client_playas, bool can_join_company) {…}
 
  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].push_back(std::make_unique<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, false);
    }
 
    /* Companies */
    for (const Company *c : Company::Iterate()) {
      if (c->index == client_playas) continue;
 
      this->RebuildListCompany(c->index, client_playas, (own_ci != nullptr && c->allow_list.Contains(own_ci->public_key)) || _network_server);
    }
 
    /* Spectators */
    this->RebuildListCompany(COMPANY_SPECTATOR, client_playas, client_playas != COMPANY_SPECTATOR);
 
    this->vscroll->SetCount(this->line_count);
  }
  void RebuildList() {…}
 
  ButtonCommon *GetButtonAtPoint(Point pt)
  {
    uint index = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_CL_MATRIX);
    Rect matrix = this->GetWidget<NWidgetBase>(WID_CL_MATRIX)->GetCurrentRect().Shrink(WidgetDimensions::scaled.framerect);
 
    bool rtl = _current_text_dir == TD_RTL;
    uint x = rtl ? matrix.left : matrix.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 + WidgetDimensions::scaled.framerect.Horizontal();
      x += rtl ? width : -width;
    }
 
    return nullptr;
  }
  ButtonCommon *GetButtonAtPoint(Point pt) {…}
 
public:
  NetworkClientListWindow(WindowDesc &desc, WindowNumber window_number) : Window(desc)
  {
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_CL_SCROLLBAR);
    this->OnInvalidateData();
    this->FinishInitNested(window_number);
  }
 
  void OnInit() override
  {
    RebuildList();
  }
  void OnInit() override {…}
 
  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] 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 OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override {…}
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    switch (widget) {
      case WID_CL_SERVER_NAME:
      case WID_CL_CLIENT_NAME: {
        std::string str;
        if (widget == WID_CL_SERVER_NAME) {
          str = GetString(STR_JUST_RAW_STRING, _network_server ? _settings_client.network.server_name : _network_server_name);
        } else {
          const NetworkClientInfo *own_ci = NetworkClientInfo::GetByClientID(_network_own_client_id);
          str = GetString(STR_JUST_RAW_STRING, own_ci != nullptr ? own_ci->client_name : _settings_client.network.client_name);
        }
        size = GetStringBoundingBox(str);
        size.width = std::min(size.width, static_cast<uint>(ScaleGUITrad(200))); // By default, don't open the window too wide.
        break;
      }
 
      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 += WidgetDimensions::scaled.framerect.Vertical();
        this->line_height = std::max(height, (uint)GetCharacterHeight(FS_NORMAL)) + padding.height;
 
        resize.width = 1;
        fill.height = resize.height = this->line_height;
        size.height = std::max(size.height, 5 * this->line_height);
        break;
      }
    }
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_CL_MATRIX);
  }
  void OnResize() override {…}
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    switch (widget) {
      case WID_CL_SERVER_NAME:
        return _network_server ? _settings_client.network.server_name : _network_server_name;
 
      case WID_CL_SERVER_VISIBILITY:
        return GetString(STR_NETWORK_SERVER_VISIBILITY_LOCAL + _settings_client.network.server_game_type);
 
      case WID_CL_SERVER_INVITE_CODE:
        return _network_server_connection_type == CONNECTION_TYPE_UNKNOWN ? std::string{} : _network_server_invite_code;
 
      case WID_CL_SERVER_CONNECTION_TYPE:
        return GetString(STR_NETWORK_CLIENT_LIST_SERVER_CONNECTION_TYPE_UNKNOWN + _network_server_connection_type);
 
      case WID_CL_CLIENT_NAME: {
        const NetworkClientInfo *own_ci = NetworkClientInfo::GetByClientID(_network_own_client_id);
        return own_ci != nullptr ? own_ci->client_name : _settings_client.network.client_name;
      }
 
      case WID_CL_CLIENT_COMPANY_COUNT:
        return GetString(STR_NETWORK_CLIENT_LIST_CLIENT_COMPANY_COUNT, NetworkClientInfo::GetNumItems(), Company::GetNumItems(), NetworkMaxCompaniesAllowed());
 
      default:
        return this->Window::GetWidgetString(widget, stringid);
    }
  }
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override {…}
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      case WID_CL_SERVER_NAME_EDIT:
        if (!_network_server) break;
 
        this->query_widget = WID_CL_SERVER_NAME_EDIT;
        ShowQueryString(_settings_client.network.server_name, STR_NETWORK_CLIENT_LIST_SERVER_NAME_QUERY_CAPTION, NETWORK_NAME_LENGTH, this, CS_ALPHANUMERAL, QueryStringFlag::LengthIsInChars);
        break;
 
      case WID_CL_CLIENT_NAME_EDIT: {
        const NetworkClientInfo *own_ci = NetworkClientInfo::GetByClientID(_network_own_client_id);
        this->query_widget = WID_CL_CLIENT_NAME_EDIT;
        ShowQueryString(own_ci != nullptr ? own_ci->client_name : _settings_client.network.client_name, STR_NETWORK_CLIENT_LIST_PLAYER_NAME_QUERY_CAPTION, NETWORK_CLIENT_NAME_LENGTH, this, CS_ALPHANUMERAL, QueryStringFlag::LengthIsInChars);
        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;
      }
    }
  }
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
 
  bool OnTooltip([[maybe_unused]] Point pt, WidgetID 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;
        Rect matrix = this->GetWidget<NWidgetBase>(WID_CL_MATRIX)->GetCurrentRect().Shrink(WidgetDimensions::scaled.framerect);
 
        Dimension d = GetSpriteSize(SPR_COMPANY_ICON);
        uint text_left  = matrix.left  + (rtl ? 0 : d.width + WidgetDimensions::scaled.hsep_wide);
        uint text_right = matrix.right - (rtl ? d.width + WidgetDimensions::scaled.hsep_wide : 0);
 
        Dimension d2 = GetSpriteSize(SPR_PLAYER_SELF);
        uint offset_x = WidgetDimensions::scaled.hsep_indent - d2.width - ScaleGUITrad(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, GetEncodedString(STR_NETWORK_CLIENT_LIST_PLAYER_ICON_SELF_TOOLTIP), close_cond);
            return true;
          } else if (index == this->player_host_index) {
            GuiShowTooltips(this, GetEncodedString(STR_NETWORK_CLIENT_LIST_PLAYER_ICON_HOST_TOOLTIP), close_cond);
            return true;
          }
        }
 
        ButtonCommon *button = this->GetButtonAtPoint(pt);
        if (button == nullptr) return false;
 
        GuiShowTooltips(this, GetEncodedString(button->tooltip), close_cond);
        return true;
      };
    }
 
    return false;
  }
  bool OnTooltip([[maybe_unused]] Point pt, WidgetID widget, TooltipCloseCondition close_cond) override {…}
 
  void OnDropdownClose(Point pt, WidgetID widget, int index, int click_result, 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, click_result, instant_close);
  }
  void OnDropdownClose(Point pt, WidgetID widget, int index, int click_result, bool instant_close) override {…}
 
  void OnDropdownSelect(WidgetID widget, int index, int) 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: {
        QueryCallbackProc *callback = nullptr;
 
        EncodedString text;
        switch (index) {
          case DD_CLIENT_ADMIN_KICK:
            _admin_client_id = this->dd_client_id;
            callback = AdminClientKickCallback;
            text = GetEncodedString(STR_NETWORK_CLIENT_LIST_ASK_CLIENT_KICK, NetworkClientInfo::GetByClientID(_admin_client_id)->client_name);
            break;
 
          case DD_CLIENT_ADMIN_BAN:
            _admin_client_id = this->dd_client_id;
            callback = AdminClientBanCallback;
            text = GetEncodedString(STR_NETWORK_CLIENT_LIST_ASK_CLIENT_BAN, NetworkClientInfo::GetByClientID(_admin_client_id)->client_name);
            break;
 
          case DD_COMPANY_ADMIN_RESET:
            _admin_company_id = this->dd_company_id;
            callback = AdminCompanyResetCallback;
            text = GetEncodedString(STR_NETWORK_CLIENT_LIST_ASK_COMPANY_RESET, _admin_company_id);
            break;
 
          default:
            NOT_REACHED();
        }
 
        assert(callback != nullptr);
 
        /* Always ask confirmation for all admin actions. */
        ShowQuery(
          GetEncodedString(STR_NETWORK_CLIENT_LIST_ASK_CAPTION),
          std::move(text),
          this, callback);
 
        break;
      }
 
      default:
        NOT_REACHED();
    }
 
    this->SetDirty();
  }
  void OnDropdownSelect(WidgetID widget, int index, int) override {…}
 
  void OnQueryTextFinished(std::optional<std::string> str) override
  {
    if (!str.has_value()) 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;
      }
    }
  }
  void OnQueryTextFinished(std::optional<std::string> str) override {…}
 
  void DrawButtons(int &x, uint y, const std::vector<std::unique_ptr<ButtonCommon>> &buttons) const
  {
    Rect r;
 
    for (auto &button : buttons) {
      bool rtl = _current_text_dir == TD_RTL;
 
      int offset = (this->line_height - button->height) / 2;
      r.left = rtl ? x : x - button->width + 1;
      r.right = rtl ? x + button->width - 1 : x;
      r.top = y + offset;
      r.bottom = r.top + button->height - 1;
 
      DrawFrameRect(r, button->colour, {});
      DrawSprite(button->sprite, PAL_NONE, r.left + WidgetDimensions::scaled.framerect.left, r.top + WidgetDimensions::scaled.framerect.top);
      if (button->disabled) {
        GfxFillRect(r.Shrink(WidgetDimensions::scaled.bevel), GetColourGradient(button->colour, SHADE_DARKER), FILLRECT_CHECKER);
      }
 
      int width = button->width + WidgetDimensions::scaled.hsep_normal;
      x += rtl ? width : -width;
    }
  }
  void DrawButtons(int &x, uint y, const std::vector<std::unique_ptr<ButtonCommon>> &buttons) const {…}
 
  void DrawCompany(CompanyID company_id, const Rect &r, uint &line) const
  {
    bool rtl = _current_text_dir == TD_RTL;
    int text_y_offset = CentreBounds(0, this->line_height, GetCharacterHeight(FS_NORMAL));
 
    Dimension d = GetSpriteSize(SPR_COMPANY_ICON);
    int offset = CentreBounds(0, this->line_height, d.height);
 
    uint line_start = this->vscroll->GetPosition();
    uint line_end = line_start + this->vscroll->GetCapacity();
 
    uint y = r.top + (this->line_height * (line - line_start));
 
    /* Draw the company line (if in range of scrollbar). */
    if (IsInsideMM(line, line_start, line_end)) {
      int icon_left = r.WithWidth(d.width, rtl).left;
      Rect tr = r.Indent(d.width + WidgetDimensions::scaled.hsep_normal, rtl);
      int &x = rtl ? tr.left : tr.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, icon_left, y + offset);
        DrawString(tr.left, tr.right, 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, icon_left, y + offset);
        DrawString(tr.left, tr.right, y + text_y_offset, STR_NETWORK_CLIENT_LIST_NEW_COMPANY, TC_WHITE);
      } else {
        DrawCompanyIcon(company_id, icon_left, y + offset);
 
        DrawString(tr.left, tr.right, y + text_y_offset, GetString(STR_COMPANY_NAME, company_id, company_id), 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)) {
        Rect tr = r.Indent(WidgetDimensions::scaled.hsep_indent, rtl);
 
        /* If there are buttons for this client, draw them. */
        auto button_find = this->buttons.find(line);
        if (button_find != this->buttons.end()) {
          int &x = rtl ? tr.left : tr.right;
          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);
          int offset_y = CentreBounds(0, this->line_height, d2.height);
          DrawSprite(player_icon, PALETTE_TO_GREY, rtl ? tr.right - d2.width : tr.left, y + offset_y);
          tr = tr.Indent(d2.width + WidgetDimensions::scaled.hsep_normal, rtl);
        }
 
        DrawString(tr.left, tr.right, y + text_y_offset, GetString(STR_JUST_RAW_STRING, ci->client_name), TC_BLACK);
      }
 
      y += this->line_height;
      line++;
    }
  }
  void DrawCompany(CompanyID company_id, const Rect &r, uint &line) const {…}
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    switch (widget) {
      case WID_CL_MATRIX: {
        Rect ir = r.Shrink(WidgetDimensions::scaled.framerect, RectPadding::zero);
        uint line = 0;
 
        if (this->hover_index >= 0) {
          Rect br = r.WithHeight(this->line_height).Translate(0, this->hover_index * this->line_height);
          GfxFillRect(br.Shrink(WidgetDimensions::scaled.bevel), 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, ir, line);
        }
 
        if (client_playas != COMPANY_SPECTATOR) {
          this->DrawCompany(client_playas, ir, line);
        }
 
        for (const Company *c : Company::Iterate()) {
          if (client_playas == c->index) continue;
          this->DrawCompany(c->index, ir, line);
        }
 
        /* Spectators */
        this->DrawCompany(COMPANY_SPECTATOR, ir, line);
 
        break;
      }
    }
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  void OnMouseOver([[maybe_unused]] Point pt, WidgetID widget) override
  {
    if (widget != WID_CL_MATRIX) {
      if (this->hover_index != -1) {
        this->hover_index = -1;
        this->SetWidgetDirty(WID_CL_MATRIX);
      }
    } else {
      int index = this->GetRowFromWidget(pt.y, widget, 0, -1);
      if (index != this->hover_index) {
        this->hover_index = index;
        this->SetWidgetDirty(WID_CL_MATRIX);
      }
    }
  }
  void OnMouseOver([[maybe_unused]] Point pt, WidgetID widget) override {…}
};
struct NetworkClientListWindow : Window {…};
 
void ShowClientList()
{
  AllocateWindowDescFront<NetworkClientListWindow>(_client_list_desc, 0);
}
 
NetworkJoinStatus _network_join_status; 
uint8_t _network_join_waiting;            
uint32_t _network_join_bytes;             
uint32_t _network_join_bytes_total;       
 
struct NetworkJoinStatusWindow : Window {
  std::shared_ptr<NetworkAuthenticationPasswordRequest> request{};
 
  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, WidgetID widget) const override
  {
    switch (widget) {
      case WID_NJS_PROGRESS_BAR: {
        /* Draw the % complete with a bar and a text */
        DrawFrameRect(r, COLOUR_GREY, {FrameFlag::BorderOnly, FrameFlag::Lowered});
        Rect ir = r.Shrink(WidgetDimensions::scaled.bevel);
        uint8_t progress; // used for progress bar
        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:
            progress = 15; // third stage is 15%
            break;
          case NETWORK_JOIN_STATUS_DOWNLOADING:
            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;
            break;
        }
        DrawFrameRect(ir.WithWidth(ir.Width() * progress / 100, _current_text_dir == TD_RTL), COLOUR_MAUVE, {});
        DrawString(ir.left, ir.right, CentreBounds(ir.top, ir.bottom, GetCharacterHeight(FS_NORMAL)), STR_NETWORK_CONNECTING_1 + _network_join_status, TC_FROMSTRING, SA_HOR_CENTER);
        break;
      }
 
      case WID_NJS_PROGRESS_TEXT:
        switch (_network_join_status) {
          case NETWORK_JOIN_STATUS_WAITING:
            DrawStringMultiLine(r, GetString(STR_NETWORK_CONNECTING_WAITING, _network_join_waiting), TC_FROMSTRING, SA_CENTER);
            break;
 
          case NETWORK_JOIN_STATUS_DOWNLOADING:
            if (_network_join_bytes_total == 0) {
              DrawStringMultiLine(r, GetString(STR_NETWORK_CONNECTING_DOWNLOADING_1, _network_join_bytes), TC_FROMSTRING, SA_CENTER);
            } else {
              DrawStringMultiLine(r, GetString(STR_NETWORK_CONNECTING_DOWNLOADING_2, _network_join_bytes, _network_join_bytes_total), TC_FROMSTRING, SA_CENTER);
            }
            break;
 
          default:
            break;
        }
        break;
    }
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    switch (widget) {
      case WID_NJS_PROGRESS_BAR:
        /* Account for the statuses */
        for (uint i = 0; i < NETWORK_JOIN_STATUS_END; i++) {
          size = maxdim(size, GetStringBoundingBox(STR_NETWORK_CONNECTING_1 + i));
        }
        /* For the number of waiting (other) players */
        size = maxdim(size, GetStringBoundingBox(GetString(STR_NETWORK_CONNECTING_WAITING, GetParamMaxValue(MAX_CLIENTS))));
        /* We need some spacing for the 'border' */
        size.height += WidgetDimensions::scaled.frametext.Horizontal();
        size.width  += WidgetDimensions::scaled.frametext.Vertical();
        break;
 
      case WID_NJS_PROGRESS_TEXT: {
        /* Account for downloading ~ 10 MiB */
        uint64_t max_digits = GetParamMaxDigits(8);
        size = maxdim(size, GetStringBoundingBox(GetString(STR_NETWORK_CONNECTING_DOWNLOADING_1, max_digits, max_digits)));
        size = maxdim(size, GetStringBoundingBox(GetString(STR_NETWORK_CONNECTING_DOWNLOADING_1, max_digits, max_digits)));
        break;
      }
    }
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    if (widget == WID_NJS_CANCELOK) { // Disconnect button
      NetworkDisconnect();
      SwitchToMode(SM_MENU);
      ShowNetworkGameWindow();
    }
  }
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
 
  void OnQueryTextFinished(std::optional<std::string> str) override
  {
    if (!str.has_value() || str->empty() || this->request == nullptr) {
      NetworkDisconnect();
      return;
    }
 
    this->request->Reply(*str);
  }
  void OnQueryTextFinished(std::optional<std::string> str) override {…}
};
struct NetworkJoinStatusWindow : Window {…};
 
static constexpr NWidgetPart _nested_network_join_status_window_widgets[] = {
  NWidget(WWT_CAPTION, COLOUR_GREY), SetStringTip(STR_NETWORK_CONNECTING_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
  NWidget(WWT_PANEL, COLOUR_GREY),
    NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0), SetPadding(WidgetDimensions::unscaled.modalpopup),
      NWidget(WWT_EMPTY, INVALID_COLOUR, WID_NJS_PROGRESS_BAR), SetFill(1, 0),
      NWidget(WWT_EMPTY, INVALID_COLOUR, WID_NJS_PROGRESS_TEXT), SetFill(1, 0), SetMinimalSize(350, 0),
      NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NJS_CANCELOK), SetMinimalSize(101, 12), SetStringTip(STR_NETWORK_CONNECTION_DISCONNECT), SetFill(1, 0),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _network_join_status_window_desc(
  WDP_CENTER, {}, 0, 0,
  WC_NETWORK_STATUS_WINDOW, WC_NONE,
  WindowDefaultFlag::Modal,
  _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(std::shared_ptr<NetworkAuthenticationPasswordRequest> request)
{
  NetworkJoinStatusWindow *w = dynamic_cast<NetworkJoinStatusWindow *>(FindWindowById(WC_NETWORK_STATUS_WINDOW, WN_NETWORK_STATUS_WINDOW_JOIN));
  if (w == nullptr) return;
  w->request = std::move(request);
 
  ShowQueryString({}, STR_NETWORK_NEED_GAME_PASSWORD_CAPTION, NETWORK_PASSWORD_LENGTH, w, CS_ALPHANUMERAL, {});
}
 
struct NetworkAskRelayWindow : public Window {
  std::string server_connection_string{}; 
  std::string relay_connection_string{}; 
  std::string token{}; 
 
  NetworkAskRelayWindow(WindowDesc &desc, Window *parent, std::string_view server_connection_string, std::string &&relay_connection_string, std::string &&token) :
    Window(desc),
    server_connection_string(server_connection_string),
    relay_connection_string(std::move(relay_connection_string)),
    token(std::move(token))
  {
    this->parent = parent;
    this->InitNested(0);
  }
 
  void Close(int data = 0) override
  {
    if (data == NRWCD_UNHANDLED) _network_coordinator_client.ConnectFailure(this->token, 0);
    this->Window::Close();
  }
  void Close(int data = 0) override {…}
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    if (widget == WID_NAR_TEXT) {
      size = GetStringBoundingBox(GetString(STR_NETWORK_ASK_RELAY_TEXT, this->server_connection_string, this->relay_connection_string));
    }
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    if (widget == WID_NAR_TEXT) {
      DrawStringMultiLine(r, GetString(STR_NETWORK_ASK_RELAY_TEXT, this->server_connection_string, this->relay_connection_string), TC_FROMSTRING, SA_CENTER);
    }
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  void FindWindowPlacementAndResize(int, int, bool) 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 FindWindowPlacementAndResize(int, int, bool) override {…}
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      case WID_NAR_NO:
        _network_coordinator_client.ConnectFailure(this->token, 0);
        this->Close(NRWCD_HANDLED);
        break;
 
      case WID_NAR_YES_ONCE:
        _network_coordinator_client.StartTurnConnection(this->token);
        this->Close(NRWCD_HANDLED);
        break;
 
      case WID_NAR_YES_ALWAYS:
        _settings_client.network.use_relay_service = URS_ALLOW;
        _network_coordinator_client.StartTurnConnection(this->token);
        this->Close(NRWCD_HANDLED);
        break;
    }
  }
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
};
struct NetworkAskRelayWindow : public Window {…};
 
static constexpr NWidgetPart _nested_network_ask_relay_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_RED),
    NWidget(WWT_CAPTION, COLOUR_RED, WID_NAR_CAPTION), SetStringTip(STR_NETWORK_ASK_RELAY_CAPTION),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_RED),
    NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0), SetPadding(WidgetDimensions::unscaled.modalpopup),
      NWidget(WWT_TEXT, INVALID_COLOUR, WID_NAR_TEXT), SetAlignment(SA_HOR_CENTER), SetFill(1, 1),
      NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
        NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_NAR_NO), SetMinimalSize(71, 12), SetFill(1, 1), SetStringTip(STR_NETWORK_ASK_RELAY_NO),
        NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_NAR_YES_ONCE), SetMinimalSize(71, 12), SetFill(1, 1), SetStringTip(STR_NETWORK_ASK_RELAY_YES_ONCE),
        NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_NAR_YES_ALWAYS), SetMinimalSize(71, 12), SetFill(1, 1), SetStringTip(STR_NETWORK_ASK_RELAY_YES_ALWAYS),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _network_ask_relay_desc(
  WDP_CENTER, {}, 0, 0,
  WC_NETWORK_ASK_RELAY, WC_NONE,
  WindowDefaultFlag::Modal,
  _nested_network_ask_relay_widgets
);
 
void ShowNetworkAskRelay(std::string_view server_connection_string, std::string &&relay_connection_string, std::string &&token)
{
  CloseWindowByClass(WC_NETWORK_ASK_RELAY, NRWCD_HANDLED);
 
  Window *parent = GetMainWindow();
  new NetworkAskRelayWindow(_network_ask_relay_desc, parent, server_connection_string, std::move(relay_connection_string), std::move(token));
}
void ShowNetworkAskRelay(std::string_view server_connection_string, std::string &&relay_connection_string, std::string &&token) {…}
 
struct NetworkAskSurveyWindow : public Window {
  NetworkAskSurveyWindow(WindowDesc &desc, Window *parent) :
    Window(desc)
  {
    this->parent = parent;
    this->InitNested(0);
  }
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    if (widget == WID_NAS_TEXT) {
      size = GetStringBoundingBox(STR_NETWORK_ASK_SURVEY_TEXT);
    }
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    if (widget == WID_NAS_TEXT) {
      DrawStringMultiLine(r, STR_NETWORK_ASK_SURVEY_TEXT, TC_BLACK, SA_CENTER);
    }
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  void FindWindowPlacementAndResize(int, int, bool) 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 FindWindowPlacementAndResize(int, int, bool) override {…}
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      case WID_NAS_PREVIEW:
        ShowSurveyResultTextfileWindow(this);
        break;
 
      case WID_NAS_LINK:
        OpenBrowser(NETWORK_SURVEY_DETAILS_LINK);
        break;
 
      case WID_NAS_NO:
        _settings_client.network.participate_survey = PS_NO;
        this->Close();
        break;
 
      case WID_NAS_YES:
        _settings_client.network.participate_survey = PS_YES;
        this->Close();
        break;
    }
  }
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
};
struct NetworkAskSurveyWindow : public Window {…};
 
static constexpr NWidgetPart _nested_network_ask_survey_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY, WID_NAS_CAPTION), SetStringTip(STR_NETWORK_ASK_SURVEY_CAPTION),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY),
    NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0), SetPadding(WidgetDimensions::unscaled.modalpopup),
      NWidget(WWT_TEXT, INVALID_COLOUR, WID_NAS_TEXT), SetAlignment(SA_HOR_CENTER), SetFill(1, 1),
      NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
        NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NAS_PREVIEW), SetMinimalSize(71, 12), SetFill(1, 1), SetStringTip(STR_NETWORK_ASK_SURVEY_PREVIEW),
        NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NAS_LINK), SetMinimalSize(71, 12), SetFill(1, 1), SetStringTip(STR_NETWORK_ASK_SURVEY_LINK),
      EndContainer(),
      NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
        NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_NAS_NO), SetMinimalSize(71, 12), SetFill(1, 1), SetStringTip(STR_NETWORK_ASK_SURVEY_NO),
        NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_NAS_YES), SetMinimalSize(71, 12), SetFill(1, 1), SetStringTip(STR_NETWORK_ASK_SURVEY_YES),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _network_ask_survey_desc(
  WDP_CENTER, {}, 0, 0,
  WC_NETWORK_ASK_SURVEY, WC_NONE,
  WindowDefaultFlag::Modal,
  _nested_network_ask_survey_widgets
);
 
void ShowNetworkAskSurvey()
{
  /* If we can't send a survey, don't ask the question. */
  if constexpr (!NetworkSurveyHandler::IsSurveyPossible()) return;
 
  CloseWindowByClass(WC_NETWORK_ASK_SURVEY);
 
  Window *parent = GetMainWindow();
  new NetworkAskSurveyWindow(_network_ask_survey_desc, parent);
}
void ShowNetworkAskSurvey() {…}
 
struct SurveyResultTextfileWindow : public TextfileWindow {
  const GRFConfig *grf_config; 
 
  SurveyResultTextfileWindow(Window *parent, TextfileType file_type) : TextfileWindow(parent, file_type)
  {
    this->ConstructWindow();
 
    auto result = _survey.CreatePayload(NetworkSurveyHandler::Reason::PREVIEW, true);
    this->LoadText(result);
    this->InvalidateData();
  }
};
struct SurveyResultTextfileWindow : public TextfileWindow {…};
 
void ShowSurveyResultTextfileWindow(Window *parent)
{
  parent->CloseChildWindowById(WC_TEXTFILE, TFT_SURVEY_RESULT);
  new SurveyResultTextfileWindow(parent, TFT_SURVEY_RESULT);
}