news_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 <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#include "stdafx.h"
#include "gui.h"
#include "viewport_func.h"
#include "strings_func.h"
#include "window_func.h"
#include "vehicle_base.h"
#include "vehicle_func.h"
#include "vehicle_gui.h"
#include "roadveh.h"
#include "station_base.h"
#include "industry.h"
#include "town.h"
#include "sound_func.h"
#include "string_func.h"
#include "statusbar_gui.h"
#include "company_manager_face.h"
#include "company_func.h"
#include "engine_base.h"
#include "engine_gui.h"
#include "core/geometry_func.hpp"
#include "command_func.h"
#include "company_base.h"
#include "settings_internal.h"
#include "group_gui.h"
#include "zoom_func.h"
#include "news_cmd.h"
#include "news_func.h"
#include "timer/timer.h"
#include "timer/timer_window.h"
#include "timer/timer_game_calendar.h"
 
#include "widgets/news_widget.h"
 
#include "table/strings.h"
 
#include "safeguards.h"
 
static const uint MIN_NEWS_AMOUNT = 30; 
static const uint MAX_NEWS_AMOUNT = 1U << 10; 
 
static NewsContainer _news; 

static NewsIterator _forced_news = std::end(_news);

static NewsIterator _current_news = std::end(_news);

static NewsIterator _statusbar_news = std::end(_news);

const NewsItem *GetStatusbarNews()
{
  return (_statusbar_news == std::end(_news)) ? nullptr : &*_statusbar_news;
}

const NewsContainer &GetNews()
{
  return _news;
}

static TileIndex GetReferenceTile(const NewsReference &reference)
{
  struct visitor {
    TileIndex operator()(const std::monostate &) { return INVALID_TILE; }
    TileIndex operator()(const TileIndex &t) { return t; }
    TileIndex operator()(const VehicleID) { return INVALID_TILE; }
    TileIndex operator()(const StationID s) { return Station::Get(s)->xy; }
    TileIndex operator()(const IndustryID i) { return Industry::Get(i)->location.tile + TileDiffXY(1, 1); }
    TileIndex operator()(const TownID t) { return Town::Get(t)->xy; }
    TileIndex operator()(const EngineID) { return INVALID_TILE; }
  };
 
  return std::visit(visitor{}, reference);
}

static constexpr std::initializer_list<NWidgetPart> _nested_normal_news_widgets = {
  NWidget(WWT_PANEL, Colours::White, WID_N_PANEL),
    NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.fullbevel),
      NWidget(NWID_LAYER, Colours::Invalid),
        /* Layer 1 */
        NWidget(NWID_VERTICAL), SetPIPRatio(0, 0, 1),
          NWidget(NWID_HORIZONTAL), SetPIPRatio(0, 1, 0),
            NWidget(WWT_CLOSEBOX, Colours::White, WID_N_CLOSEBOX),
            NWidget(WWT_LABEL, Colours::Invalid, WID_N_DATE),
                SetTextStyle(TC_BLACK, FontSize::Small),
                SetAlignment(SA_RIGHT | SA_TOP),
          EndContainer(),
        EndContainer(),
        /* Layer 2 */
        NWidget(WWT_EMPTY, Colours::Invalid, WID_N_MESSAGE),
            SetMinimalTextLines(8, 0, FontSize::Large),
            SetMinimalSize(400, 0),
            SetPadding(WidgetDimensions::unscaled.hsep_indent, WidgetDimensions::unscaled.vsep_wide),
            SetTextStyle(TC_BLACK, FontSize::Large),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};

static WindowDesc _normal_news_desc(
  WindowPosition::Manual, {}, 0, 0,
  WC_NEWS_WINDOW, WC_NONE,
  {},
  _nested_normal_news_widgets
);

static constexpr std::initializer_list<NWidgetPart> _nested_vehicle_news_widgets = {
  NWidget(WWT_PANEL, Colours::White, WID_N_PANEL),
    NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.fullbevel),
      NWidget(NWID_LAYER, Colours::Invalid),
        /* Layer 1 */
        NWidget(NWID_VERTICAL), SetPIPRatio(0, 0, 1),
          NWidget(NWID_HORIZONTAL), SetPIPRatio(0, 1, 0),
            NWidget(WWT_CLOSEBOX, Colours::White, WID_N_CLOSEBOX),
          EndContainer(),
        EndContainer(),
        /* Layer 2 */
        NWidget(WWT_LABEL, Colours::Invalid, WID_N_VEH_TITLE),
            SetFill(1, 1),
            SetMinimalTextLines(2, 0, FontSize::Large),
            SetMinimalSize(400, 0),
            SetPadding(WidgetDimensions::unscaled.hsep_indent, WidgetDimensions::unscaled.vsep_wide),
            SetStringTip(STR_EMPTY),
            SetTextStyle(TC_BLACK, FontSize::Large),
      EndContainer(),
      NWidget(WWT_PANEL, Colours::White, WID_N_VEH_BKGND), SetPadding(WidgetDimensions::unscaled.fullbevel),
        NWidget(NWID_VERTICAL),
          NWidget(WWT_EMPTY, Colours::Invalid, WID_N_VEH_NAME),
              SetMinimalTextLines(1, 0, FontSize::Large),
              SetMinimalSize(350, 0),
              SetPadding(WidgetDimensions::unscaled.hsep_indent, WidgetDimensions::unscaled.vsep_wide),
              SetFill(1, 0),
          NWidget(WWT_EMPTY, Colours::Invalid, WID_N_VEH_SPR),
              SetMinimalSize(350, 32),
              SetFill(1, 0),
          NWidget(WWT_EMPTY, Colours::Invalid, WID_N_VEH_INFO),
              SetMinimalTextLines(3, 0, FontSize::Normal),
              SetMinimalSize(350, 0),
              SetPadding(WidgetDimensions::unscaled.hsep_indent, WidgetDimensions::unscaled.vsep_wide),
              SetFill(1, 0),
        EndContainer(),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};

static WindowDesc _vehicle_news_desc(
  WindowPosition::Manual, {}, 0, 0,
  WC_NEWS_WINDOW, WC_NONE,
  {},
  _nested_vehicle_news_widgets
);

static constexpr std::initializer_list<NWidgetPart> _nested_company_news_widgets = {
  NWidget(WWT_PANEL, Colours::White, WID_N_PANEL),
    NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.fullbevel),
      NWidget(NWID_LAYER, Colours::Invalid),
        /* Layer 1 */
        NWidget(NWID_VERTICAL), SetPIPRatio(0, 0, 1),
          NWidget(NWID_HORIZONTAL), SetPIPRatio(0, 1, 0),
            NWidget(WWT_CLOSEBOX, Colours::White, WID_N_CLOSEBOX),
          EndContainer(),
        EndContainer(),
        /* Layer 2 */
        NWidget(WWT_LABEL, Colours::Invalid, WID_N_TITLE),
            SetFill(1, 1),
            SetMinimalTextLines(1, 0, FontSize::Large),
            SetMinimalSize(400, 0),
            SetPadding(WidgetDimensions::unscaled.hsep_indent, WidgetDimensions::unscaled.vsep_normal),
            SetTextStyle(TC_BLACK, FontSize::Large),
      EndContainer(),
      NWidget(NWID_HORIZONTAL),
        NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0), SetPadding(2),
          NWidget(WWT_EMPTY, Colours::Invalid, WID_N_MGR_FACE),
              SetFill(0, 0),
              SetMinimalSize(93, 119),
          NWidget(WWT_EMPTY, Colours::Invalid, WID_N_MGR_NAME),
              SetFill(0, 1),
              SetMinimalTextLines(2, 0),
        EndContainer(),
        NWidget(WWT_EMPTY, Colours::Invalid, WID_N_COMPANY_MSG),
            SetFill(1, 1),
            SetPadding(WidgetDimensions::unscaled.hsep_indent, WidgetDimensions::unscaled.vsep_wide),
            SetMinimalSize(300, 0),
            SetTextStyle(TC_BLACK, FontSize::Large),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};

static WindowDesc _company_news_desc(
  WindowPosition::Manual, {}, 0, 0,
  WC_NEWS_WINDOW, WC_NONE,
  {},
  _nested_company_news_widgets
);

static constexpr std::initializer_list<NWidgetPart> _nested_thin_news_widgets = {
  NWidget(WWT_PANEL, Colours::White, WID_N_PANEL),
    NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.fullbevel),
      NWidget(NWID_LAYER, Colours::Invalid),
        /* Layer 1 */
        NWidget(NWID_VERTICAL), SetPIPRatio(0, 0, 1),
          NWidget(NWID_HORIZONTAL), SetPIPRatio(0, 1, 0),
            NWidget(WWT_CLOSEBOX, Colours::White, WID_N_CLOSEBOX),
            NWidget(WWT_LABEL, Colours::Invalid, WID_N_DATE),
                SetTextStyle(TC_BLACK, FontSize::Small),
                SetAlignment(SA_RIGHT | SA_TOP),
          EndContainer(),
        EndContainer(),
        /* Layer 2 */
        NWidget(WWT_EMPTY, Colours::Invalid, WID_N_MESSAGE),
            SetMinimalTextLines(3, 0, FontSize::Large),
            SetMinimalSize(400, 0),
            SetPadding(WidgetDimensions::unscaled.hsep_indent, WidgetDimensions::unscaled.vsep_normal),
            SetTextStyle(TC_BLACK, FontSize::Large),
      EndContainer(),
      NWidget(NWID_VIEWPORT, Colours::Invalid, WID_N_VIEWPORT), SetMinimalSize(426, 70),
          SetPadding(WidgetDimensions::unscaled.fullbevel),
    EndContainer(),
  EndContainer(),
};

static WindowDesc _thin_news_desc(
  WindowPosition::Manual, {}, 0, 0,
  WC_NEWS_WINDOW, WC_NONE,
  {},
  _nested_thin_news_widgets
);

static constexpr std::initializer_list<NWidgetPart> _nested_small_news_widgets = {
  /* Caption + close box. The caption is not WWT_CAPTION as the window shall not be moveable and so on. */
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, Colours::LightBlue, WID_N_CLOSEBOX),
    NWidget(WWT_EMPTY, Colours::Invalid, WID_N_CAPTION),
    NWidget(NWID_SELECTION, Colours::Invalid, WID_N_SHOW_GROUP_SEL),
      NWidget(WWT_TEXTBTN, Colours::LightBlue, WID_N_SHOW_GROUP),
          SetAspect(WidgetDimensions::ASPECT_VEHICLE_ICON),
          SetResize(1, 0),
          SetToolTip(STR_NEWS_SHOW_VEHICLE_GROUP_TOOLTIP),
    EndContainer(),
  EndContainer(),
 
  /* Main part */
  NWidget(WWT_PANEL, Colours::LightBlue, WID_N_HEADLINE),
    NWidget(NWID_VERTICAL),
        SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
        SetPadding(2),
      NWidget(WWT_INSET, Colours::LightBlue, WID_N_INSET),
        NWidget(NWID_VIEWPORT, Colours::Invalid, WID_N_VIEWPORT),
            SetMinimalSize(274, 47),
      EndContainer(),
      NWidget(WWT_EMPTY, Colours::Invalid, WID_N_MESSAGE),
          SetMinimalTextLines(2, 0),
          SetMinimalSize(275, 0),
          SetTextStyle(TC_WHITE, FontSize::Normal),
    EndContainer(),
  EndContainer(),
};

static WindowDesc _small_news_desc(
  WindowPosition::Manual, {}, 0, 0,
  WC_NEWS_WINDOW, WC_NONE,
  {},
  _nested_small_news_widgets
);

static WindowDesc *_news_window_layout[] = {
  &_thin_news_desc,    // NewsStyle::Thin
  &_small_news_desc,   // NewsStyle::Small
  &_normal_news_desc,  // NewsStyle::Normal
  &_vehicle_news_desc, // NewsStyle::Vehicle
  &_company_news_desc, // NewsStyle::Company
};
 
static WindowDesc &GetNewsWindowLayout(NewsStyle style)
{
  uint layout = to_underlying(style);
  assert(layout < lengthof(_news_window_layout));
  return *_news_window_layout[layout];
}

static const NewsTypeData _news_type_data[] = {
  /*            name,                           age, sound,          */
  NewsTypeData("news_display.arrival_player",    60, SND_1D_APPLAUSE ),  
  NewsTypeData("news_display.arrival_other",     60, SND_1D_APPLAUSE ),  
  NewsTypeData("news_display.accident",          90, SND_BEGIN       ),  
  NewsTypeData("news_display.accident_other",    90, SND_BEGIN       ),  
  NewsTypeData("news_display.company_info",      60, SND_BEGIN       ),  
  NewsTypeData("news_display.open",              90, SND_BEGIN       ),  
  NewsTypeData("news_display.close",             90, SND_BEGIN       ),  
  NewsTypeData("news_display.economy",           30, SND_BEGIN       ),  
  NewsTypeData("news_display.production_player", 30, SND_BEGIN       ),  
  NewsTypeData("news_display.production_other",  30, SND_BEGIN       ),  
  NewsTypeData("news_display.production_nobody", 30, SND_BEGIN       ),  
  NewsTypeData("news_display.advice",           150, SND_BEGIN       ),  
  NewsTypeData("news_display.new_vehicles",      30, SND_1E_NEW_ENGINE), 
  NewsTypeData("news_display.acceptance",        90, SND_BEGIN       ),  
  NewsTypeData("news_display.subsidies",        180, SND_BEGIN       ),  
  NewsTypeData("news_display.general",           60, SND_BEGIN       ),  
};
 
static_assert(std::size(_news_type_data) == to_underlying(NewsType::End));

NewsDisplay NewsTypeData::GetDisplay() const
{
  const SettingDesc *sd = GetSettingFromName(this->name);
  assert(sd != nullptr && sd->IsIntSetting());
  return static_cast<NewsDisplay>(sd->AsIntSetting()->Read(nullptr));
}

struct NewsWindow : Window {
  uint16_t chat_height = 0; 
  uint16_t status_height = 0; 
  const NewsItem *ni = nullptr; 
  static int duration; 
 
  NewsWindow(WindowDesc &desc, const NewsItem *ni) : Window(desc), ni(ni)
  {
    NewsWindow::duration = 16650;
    const Window *w = FindWindowByClass(WC_SEND_NETWORK_MSG);
    this->chat_height = (w != nullptr) ? w->height : 0;
    this->status_height = FindWindowById(WC_STATUS_BAR, 0)->height;
 
    this->flags.Set(WindowFlag::DisableVpScroll);
 
    this->CreateNestedTree();
 
    bool has_vehicle_id = std::holds_alternative<VehicleID>(ni->ref1);
    NWidgetStacked *nwid_sel = this->GetWidget<NWidgetStacked>(WID_N_SHOW_GROUP_SEL);
    if (nwid_sel != nullptr) nwid_sel->SetDisplayedPlane(has_vehicle_id ? 0 : SZSP_NONE);
 
    NWidgetCore *nwid = this->GetWidget<NWidgetCore>(WID_N_SHOW_GROUP);
    if (has_vehicle_id && nwid != nullptr) {
      const Vehicle *v = Vehicle::Get(std::get<VehicleID>(ni->ref1));
      switch (v->type) {
        case VehicleType::Train:
          nwid->SetString(STR_TRAIN);
          break;
        case VehicleType::Road:
          nwid->SetString(RoadVehicle::From(v)->IsBus() ? STR_BUS : STR_LORRY);
          break;
        case VehicleType::Ship:
          nwid->SetString(STR_SHIP);
          break;
        case VehicleType::Aircraft:
          nwid->SetString(STR_PLANE);
          break;
        default:
          break; // Do nothing
      }
    }
 
    this->FinishInitNested(0);
 
    /* Initialize viewport if it exists. */
    NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(WID_N_VIEWPORT);
    if (nvp != nullptr) {
      if (std::holds_alternative<VehicleID>(ni->ref1)) {
        nvp->InitializeViewport(this, std::get<VehicleID>(ni->ref1), ScaleZoomGUI(ZoomLevel::News));
      } else {
        nvp->InitializeViewport(this, GetReferenceTile(ni->ref1), ScaleZoomGUI(ZoomLevel::News));
      }
      if (this->ni->flags.Test(NewsFlag::NoTransparency)) nvp->disp_flags.Set(NWidgetDisplayFlag::NoTransparency);
      if (!this->ni->flags.Test(NewsFlag::InColour)) {
        nvp->disp_flags.Set(NWidgetDisplayFlag::ShadeGrey);
      } else if (this->ni->flags.Test(NewsFlag::Shaded)) {
        nvp->disp_flags.Set(NWidgetDisplayFlag::ShadeDimmed);
      }
    }
 
    PositionNewsMessage(this);
  }
 
  void DrawNewsBorder(const Rect &r) const
  {
    Rect ir = r.Shrink(WidgetDimensions::scaled.bevel);
    GfxFillRect(ir, PC_WHITE);
 
    ir = ir.Expand(1);
    GfxFillRect( r.left,   r.top,    ir.left,   r.bottom, PC_BLACK);
    GfxFillRect(ir.right,  r.top,     r.right,  r.bottom, PC_BLACK);
    GfxFillRect( r.left,   r.top,     r.right, ir.top,    PC_BLACK);
    GfxFillRect( r.left,  ir.bottom,  r.right,  r.bottom, PC_BLACK);
  }
 
  Point OnInitialPosition([[maybe_unused]] int16_t sm_width, [[maybe_unused]] int16_t sm_height, [[maybe_unused]] int window_number) override
  {
    Point pt = { 0, _screen.height };
    return pt;
  }
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    FontSize fontsize = FontSize::Normal;
    std::string str;
    switch (widget) {
      case WID_N_CAPTION: {
        /* Caption is not a real caption (so that the window cannot be moved)
         * thus it doesn't get the default sizing of a caption. */
        Dimension d2 = GetStringBoundingBox(STR_NEWS_MESSAGE_CAPTION);
        d2.height += WidgetDimensions::scaled.captiontext.Vertical();
        size = maxdim(size, d2);
        return;
      }
 
      case WID_N_MGR_FACE:
        size = maxdim(size, GetScaledSpriteSize(SPR_GRADIENT));
        break;
 
      case WID_N_MESSAGE:
      case WID_N_COMPANY_MSG:
        fontsize = this->GetWidget<NWidgetLeaf>(widget)->GetFontSize();
        str = this->ni->headline.GetDecodedString();
        break;
 
      case WID_N_VEH_NAME:
      case WID_N_VEH_TITLE:
        str = this->GetNewVehicleMessageString(widget);
        break;
 
      case WID_N_VEH_INFO: {
        assert(std::holds_alternative<EngineID>(ni->ref1));
        EngineID engine = std::get<EngineID>(this->ni->ref1);
        str = GetEngineInfoString(engine);
        break;
      }
 
      case WID_N_SHOW_GROUP:
        if (std::holds_alternative<VehicleID>(ni->ref1)) {
          Dimension d2 = GetStringBoundingBox(this->GetWidget<NWidgetCore>(WID_N_SHOW_GROUP)->GetString());
          d2.height += WidgetDimensions::scaled.captiontext.Vertical();
          d2.width += WidgetDimensions::scaled.captiontext.Horizontal();
          size = d2;
        }
        return;
 
      default:
        return; // Do nothing
    }
 
    /* Update minimal size with length of the multi-line string. */
    Dimension d = size;
    d.width = (d.width >= padding.width) ? d.width - padding.width : 0;
    d.height = (d.height >= padding.height) ? d.height - padding.height : 0;
    d = GetStringMultiLineBoundingBox(str, d, fontsize);
    d.width += padding.width;
    d.height += padding.height;
    size = maxdim(size, d);
  }
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    if (widget == WID_N_DATE) {
      return GetString(STR_JUST_DATE_LONG, this->ni->date);
    } else if (widget == WID_N_TITLE) {
      const CompanyNewsInformation *cni = static_cast<const CompanyNewsInformation*>(this->ni->data.get());
      return GetString(cni->title);
    }
 
    return this->Window::GetWidgetString(widget, stringid);
 
  }
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    switch (widget) {
      case WID_N_CAPTION:
        DrawCaption(r, Colours::LightBlue, this->owner, TC_FROMSTRING, GetString(STR_NEWS_MESSAGE_CAPTION), SA_CENTER, FontSize::Normal);
        break;
 
      case WID_N_PANEL:
        this->DrawNewsBorder(r);
        break;
 
      case WID_N_MESSAGE:
      case WID_N_COMPANY_MSG: {
        const NWidgetLeaf &nwid = *this->GetWidget<NWidgetLeaf>(widget);
        DrawStringMultiLine(r, this->ni->headline.GetDecodedString(), nwid.GetTextColour(), SA_CENTER, false, nwid.GetFontSize());
        break;
      }
 
      case WID_N_MGR_FACE: {
        const CompanyNewsInformation *cni = static_cast<const CompanyNewsInformation*>(this->ni->data.get());
        DrawCompanyManagerFace(cni->face, cni->colour, r);
        GfxFillRect(r, PALETTE_NEWSPAPER, FillRectMode::Recolour);
        break;
      }
      case WID_N_MGR_NAME: {
        const CompanyNewsInformation *cni = static_cast<const CompanyNewsInformation*>(this->ni->data.get());
        DrawStringMultiLine(r, GetString(STR_JUST_RAW_STRING, cni->president_name), TC_FROMSTRING, SA_CENTER);
        break;
      }
 
      case WID_N_VEH_BKGND:
        GfxFillRect(r, PC_GREY);
        break;
 
      case WID_N_VEH_NAME:
      case WID_N_VEH_TITLE:
        DrawStringMultiLine(r, this->GetNewVehicleMessageString(widget), TC_FROMSTRING, SA_CENTER);
        break;
 
      case WID_N_VEH_SPR: {
        assert(std::holds_alternative<EngineID>(ni->ref1));
        EngineID engine = std::get<EngineID>(this->ni->ref1);
        DrawVehicleEngine(r.left, r.right, CentreBounds(r.left, r.right, 0), CentreBounds(r.top, r.bottom, 0), engine, GetEnginePalette(engine, _local_company), EIT_PREVIEW);
        GfxFillRect(r, PALETTE_NEWSPAPER, FillRectMode::Recolour);
        break;
      }
      case WID_N_VEH_INFO: {
        assert(std::holds_alternative<EngineID>(ni->ref1));
        EngineID engine = std::get<EngineID>(this->ni->ref1);
        DrawStringMultiLine(r, GetEngineInfoString(engine), TC_BLACK, SA_CENTER);
        break;
      }
    }
  }
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      case WID_N_CLOSEBOX:
        NewsWindow::duration = 0;
        this->Close();
        _forced_news = std::end(_news);
        break;
 
      case WID_N_CAPTION:
        if (std::holds_alternative<VehicleID>(ni->ref1)) {
          const Vehicle *v = Vehicle::Get(std::get<VehicleID>(this->ni->ref1));
          ShowVehicleViewWindow(v);
        }
        break;
 
      case WID_N_VIEWPORT:
        break; // Ignore clicks
 
      case WID_N_SHOW_GROUP:
        if (std::holds_alternative<VehicleID>(ni->ref1)) {
          const Vehicle *v = Vehicle::Get(std::get<VehicleID>(this->ni->ref1));
          ShowCompanyGroupForVehicle(v);
        }
        break;
      default:
        if (std::holds_alternative<VehicleID>(ni->ref1)) {
          const Vehicle *v = Vehicle::Get(std::get<VehicleID>(this->ni->ref1))->GetMovingFront();
          ScrollMainWindowTo(v->x_pos, v->y_pos, v->z_pos);
        } else {
          TileIndex tile1 = GetReferenceTile(this->ni->ref1);
          TileIndex tile2 = GetReferenceTile(this->ni->ref2);
          if (_ctrl_pressed) {
            if (tile1 != INVALID_TILE) ShowExtraViewportWindow(tile1);
            if (tile2 != INVALID_TILE) ShowExtraViewportWindow(tile2);
          } else {
            if ((tile1 == INVALID_TILE || !ScrollMainWindowToTile(tile1)) && tile2 != INVALID_TILE) {
              ScrollMainWindowToTile(tile2);
            }
          }
        }
        break;
    }
  }
 
  void OnResize() override
  {
    if (this->viewport != nullptr) {
      NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(WID_N_VIEWPORT);
      nvp->UpdateViewportCoordinates(this);
 
      if (!std::holds_alternative<VehicleID>(ni->ref1)) {
        ScrollWindowToTile(GetReferenceTile(ni->ref1), this, true); // Re-center viewport.
      }
    }
 
    NWidgetResizeBase *wid = this->GetWidget<NWidgetResizeBase>(WID_N_MGR_NAME);
    if (wid != nullptr) {
      int y = GetStringHeight(GetString(STR_JUST_RAW_STRING, static_cast<const CompanyNewsInformation *>(this->ni->data.get())->president_name), wid->current_x);
      if (wid->UpdateVerticalSize(y)) this->ReInit(0, 0);
    }
  }

  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
  {
    if (!gui_scope) return;
    /* The chatbar has notified us that is was either created or closed */
    int newtop = this->top + this->chat_height - data;
    this->chat_height = data;
    this->SetWindowTop(newtop);
  }
 
  void OnRealtimeTick([[maybe_unused]] uint delta_ms) override
  {
    /* Decrement the news timer. We don't need to action an elapsed event here,
     * so no need to use TimerElapsed(). */
    if (NewsWindow::duration > 0) NewsWindow::duration -= delta_ms;
  }

  const IntervalTimer<TimerWindow> scroll_interval = {std::chrono::milliseconds(210) / GetCharacterHeight(FontSize::Normal), [this](uint count) {
    int newtop = std::max(this->top - 2 * static_cast<int>(count), _screen.height - this->height - this->status_height - this->chat_height);
    this->SetWindowTop(newtop);
  }};
 
private:
  void SetWindowTop(int newtop)
  {
    if (this->top == newtop) return;
 
    int mintop = std::min(newtop, this->top);
    int maxtop = std::max(newtop, this->top);
    if (this->viewport != nullptr) this->viewport->top += newtop - this->top;
    this->top = newtop;
 
    AddDirtyBlock(this->left, mintop, this->left + this->width, maxtop + this->height);
  }
 
  std::string GetNewVehicleMessageString(WidgetID widget) const
  {
    assert(std::holds_alternative<EngineID>(ni->ref1));
    EngineID engine = std::get<EngineID>(this->ni->ref1);
 
    switch (widget) {
      case WID_N_VEH_TITLE:
        return GetString(STR_NEWS_NEW_VEHICLE_NOW_AVAILABLE, GetEngineCategoryName(engine));
 
      case WID_N_VEH_NAME:
        return GetString(STR_NEWS_NEW_VEHICLE_TYPE, PackEngineNameDParam(engine, EngineNameContext::PreviewNews));
 
      default:
        NOT_REACHED();
    }
  }
};
 
/* static */ int NewsWindow::duration = 0; // Instance creation.

static void ShowNewspaper(const NewsItem *ni)
{
  SoundFx sound = _news_type_data[to_underlying(ni->type)].sound;
  if (sound != 0 && _settings_client.sound.news_full) SndPlayFx(sound);
 
  new NewsWindow(GetNewsWindowLayout(ni->style), ni);
}

static void ShowTicker(NewsIterator ni)
{
  if (_settings_client.sound.news_ticker) SndPlayFx(SND_16_NEWS_TICKER);
 
  _statusbar_news = ni;
  InvalidateWindowData(WC_STATUS_BAR, 0, SBI_SHOW_TICKER);
}

void InitNewsItemStructs()
{
  _news.clear();
  _forced_news = std::end(_news);
  _current_news = std::end(_news);
  _statusbar_news = std::end(_news);
  NewsWindow::duration = 0;
}

static bool ReadyForNextTickerItem()
{
  const NewsItem *ni = GetStatusbarNews();
  if (ni == nullptr) return true;
 
  /* Ticker message
   * Check if the status bar message is still being displayed? */
  return !IsNewsTickerShown();
}

static bool ReadyForNextNewsItem()
{
  if (_forced_news == std::end(_news) && _current_news == std::end(_news)) return true;
 
  /* neither newsticker nor newspaper are running */
  return (NewsWindow::duration <= 0 || FindWindowById(WC_NEWS_WINDOW, 0) == nullptr);
}

static void MoveToNextTickerItem()
{
  /* There is no status bar, so no reason to show news;
   * especially important with the end game screen when
   * there is no status bar but possible news. */
  if (FindWindowById(WC_STATUS_BAR, 0) == nullptr) return;
 
  /* No news to move to. */
  if (std::empty(_news)) return;
 
  /* if we're not at the latest item, then move on */
  while (_statusbar_news != std::begin(_news)) {
    --_statusbar_news;
    const NewsType type = _statusbar_news->type;
 
    /* check the date, don't show too old items */
    if (TimerGameEconomy::date - _news_type_data[to_underlying(type)].age > _statusbar_news->economy_date) continue;
 
    switch (_news_type_data[to_underlying(type)].GetDisplay()) {
      default: NOT_REACHED();
      case NewsDisplay::Off: // Show nothing only a small reminder in the status bar.
        InvalidateWindowData(WC_STATUS_BAR, 0, SBI_SHOW_REMINDER);
        return;
 
      case NewsDisplay::Summary: // Show ticker.
        ShowTicker(_statusbar_news);
        return;
 
      case NewsDisplay::Full: // Show newspaper, skipped here.
        break;;
    }
  }
}

static void MoveToNextNewsItem()
{
  /* There is no status bar, so no reason to show news;
   * especially important with the end game screen when
   * there is no status bar but possible news. */
  if (FindWindowById(WC_STATUS_BAR, 0) == nullptr) return;
 
  CloseWindowById(WC_NEWS_WINDOW, 0); // close the newspapers window if shown
  _forced_news = std::end(_news);
 
  /* No news to move to. */
  if (std::empty(_news)) return;
 
  /* if we're not at the latest item, then move on */
  while (_current_news != std::begin(_news)) {
    --_current_news;
    const NewsType type = _current_news->type;
 
    /* check the date, don't show too old items */
    if (TimerGameEconomy::date - _news_type_data[to_underlying(type)].age > _current_news->economy_date) continue;
 
    switch (_news_type_data[to_underlying(type)].GetDisplay()) {
      default: NOT_REACHED();
      case NewsDisplay::Off: // Show nothing only a small reminder in the status bar, skipped here.
        break;
 
      case NewsDisplay::Summary: // Show ticker, skipped here.
        break;
 
      case NewsDisplay::Full: // Sshow newspaper.
        ShowNewspaper(&*_current_news);
        return;
    }
  }
}

static std::list<NewsItem>::iterator DeleteNewsItem(std::list<NewsItem>::iterator ni)
{
  bool update_current_news = (_forced_news == ni || _current_news == ni);
  bool update_statusbar_news = (_statusbar_news == ni);
 
  if (update_current_news) {
    /* When we're the current news, go to the next older item first;
     * we just possibly made that the last news item. */
    if (_current_news == ni) ++_current_news;
    if (_forced_news == ni) _forced_news = std::end(_news);
  }
 
  if (update_statusbar_news) {
    /* When we're the current news, go to the next older item first;
     * we just possibly made that the last news item. */
    ++_statusbar_news;
  }
 
  /* Delete the news from the news queue. */
  ni = _news.erase(ni);
 
  if (update_current_news) {
    /* About to remove the currently forced item (shown as newspapers) ||
     * about to remove the currently displayed item (newspapers) */
    MoveToNextNewsItem();
  }
 
  if (update_statusbar_news) {
    /* About to remove the currently displayed item (ticker, or just a reminder) */
    InvalidateWindowData(WC_STATUS_BAR, 0, SBI_NEWS_DELETED); // invalidate the statusbar
    MoveToNextTickerItem();
  }
 
  return ni;
}

NewsItem::NewsItem(EncodedString &&headline, NewsType type, NewsStyle style, NewsFlags flags, NewsReference ref1, NewsReference ref2, std::unique_ptr<NewsAllocatedData> &&data, AdviceType advice_type) :
  headline(std::move(headline)), date(TimerGameCalendar::date), economy_date(TimerGameEconomy::date), type(type), advice_type(advice_type), style(style), flags(flags), ref1(ref1), ref2(ref2), data(std::move(data))
{
  /* show this news message in colour? */
  if (TimerGameCalendar::year >= _settings_client.gui.coloured_news_year) this->flags.Set(NewsFlag::InColour);
}
 
std::string NewsItem::GetStatusText() const
{
  if (this->data != nullptr) {
    /* CompanyNewsInformation is the only type of additional data used. */
    const CompanyNewsInformation &cni = *static_cast<const CompanyNewsInformation*>(this->data.get());
    return GetString(STR_MESSAGE_NEWS_FORMAT, cni.title, this->headline.GetDecodedString());
  }
 
  return this->headline.GetDecodedString();
}

void AddNewsItem(EncodedString &&headline, NewsType type, NewsStyle style, NewsFlags flags, NewsReference ref1, NewsReference ref2, std::unique_ptr<NewsAllocatedData> &&data, AdviceType advice_type)
{
  if (_game_mode == GM_MENU) return;
 
  /* Create new news item node */
  _news.emplace_front(std::move(headline), type, style, flags, ref1, ref2, std::move(data), advice_type);
 
  /* Keep the number of stored news items to a manageable number */
  if (std::size(_news) > MAX_NEWS_AMOUNT) {
    DeleteNewsItem(std::prev(std::end(_news)));
  }
 
  InvalidateWindowData(WC_MESSAGE_HISTORY, 0);
}

uint32_t SerialiseNewsReference(const NewsReference &reference)
{
  struct visitor {
    uint32_t operator()(const std::monostate &) { return 0; }
    uint32_t operator()(const TileIndex &t) { return t.base(); }
    uint32_t operator()(const VehicleID v) { return v.base(); }
    uint32_t operator()(const StationID s) { return s.base(); }
    uint32_t operator()(const IndustryID i) { return i.base(); }
    uint32_t operator()(const TownID t) { return t.base(); }
    uint32_t operator()(const EngineID e) { return e.base(); }
  };
 
  return std::visit(visitor{}, reference);
}

CommandCost CmdCustomNewsItem(DoCommandFlags flags, NewsType type, CompanyID company, NewsReference reference, const EncodedString &text)
{
  if (_current_company != OWNER_DEITY) return CMD_ERROR;
 
  if (company != INVALID_OWNER && !Company::IsValidID(company)) return CMD_ERROR;
  if (type >= NewsType::End) return CMD_ERROR;
  if (text.empty()) return CMD_ERROR;
 
  struct visitor {
    bool operator()(const std::monostate &) { return true; }
    bool operator()(const TileIndex t) { return IsValidTile(t); }
    bool operator()(const VehicleID v) { return Vehicle::IsValidID(v); }
    bool operator()(const StationID s) { return Station::IsValidID(s); }
    bool operator()(const IndustryID i) { return Industry::IsValidID(i); }
    bool operator()(const TownID t) { return Town::IsValidID(t); }
    bool operator()(const EngineID e) { return Engine::IsValidID(e); }
  };
 
  if (!std::visit(visitor{}, reference)) return CMD_ERROR;
 
  if (company != INVALID_OWNER && company != _local_company) return CommandCost();
 
  if (flags.Test(DoCommandFlag::Execute)) {
    AddNewsItem(EncodedString{text}, type, NewsStyle::Normal, {}, reference, {});
  }
 
  return CommandCost();
}

template <size_t Tmin = 0, class Tpredicate>
void DeleteNews(Tpredicate predicate)
{
  bool dirty = false;
  for (auto it = std::rbegin(_news); it != std::rend(_news); /* nothing */) {
    if constexpr (Tmin > 0) {
      if (std::size(_news) <= Tmin) break;
    }
    if (predicate(*it)) {
      it = std::make_reverse_iterator(DeleteNewsItem(std::prev(it.base())));
      dirty = true;
    } else {
      ++it;
    }
  }
  if (dirty) InvalidateWindowData(WC_MESSAGE_HISTORY, 0);
}
 
template <typename T>
static bool IsReferenceObject(const NewsReference &reference, T id)
{
  return std::holds_alternative<T>(reference) && std::get<T>(reference) == id;
}
 
template <typename T>
static bool HasReferenceObject(const NewsItem &ni, T id)
{
  return IsReferenceObject(ni.ref1, id) || IsReferenceObject(ni.ref2, id);
}

void DeleteVehicleNews(VehicleID vid, AdviceType advice_type)
{
  DeleteNews([&](const auto &ni) {
    return HasReferenceObject(ni, vid) && (advice_type == AdviceType::Invalid || ni.advice_type == advice_type);
  });
}

void DeleteStationNews(StationID sid)
{
  DeleteNews([&](const auto &ni) {
    return HasReferenceObject(ni, sid);
  });
}

void DeleteIndustryNews(IndustryID iid)
{
  DeleteNews([&](const auto &ni) {
    return HasReferenceObject(ni, iid);
  });
}
 
bool IsInvalidEngineNews(const NewsReference &reference)
{
  if (!std::holds_alternative<EngineID>(reference)) return false;
 
  EngineID eid = std::get<EngineID>(reference);
  return !Engine::IsValidID(eid) || !Engine::Get(eid)->IsEnabled();
}

void DeleteInvalidEngineNews()
{
  DeleteNews([](const auto &ni) {
    return IsInvalidEngineNews(ni.ref1) || IsInvalidEngineNews(ni.ref2);
  });
}
 
static void RemoveOldNewsItems()
{
  DeleteNews<MIN_NEWS_AMOUNT>([](const auto &ni) {
    return TimerGameEconomy::date - _news_type_data[to_underlying(ni.type)].age * _settings_client.gui.news_message_timeout > ni.economy_date;
  });
}
 
template <typename T>
static void ChangeObject(NewsReference reference, T from, T to)
{
  if (!std::holds_alternative<T>(reference)) return;
  if (std::get<T>(reference) == from) reference = to;
}

void ChangeVehicleNews(VehicleID from_index, VehicleID to_index)
{
  for (auto &ni : _news) {
    ChangeObject(ni.ref1, from_index, to_index);
    ChangeObject(ni.ref2, from_index, to_index);
    if (ni.flags.Test(NewsFlag::VehicleParam0) && IsReferenceObject(ni.ref1, to_index)) ni.headline = ni.headline.ReplaceParam(0, to_index.base());
  }
}
 
void NewsLoop()
{
  /* no news item yet */
  if (std::empty(_news)) return;
 
  static TimerGameEconomy::Month _last_clean_month = 0;
 
  if (_last_clean_month != TimerGameEconomy::month) {
    RemoveOldNewsItems();
    _last_clean_month = TimerGameEconomy::month;
  }
 
  if (ReadyForNextTickerItem()) MoveToNextTickerItem();
  if (ReadyForNextNewsItem()) MoveToNextNewsItem();
}

static void ShowNewsMessage(NewsIterator ni)
{
  assert(!std::empty(_news));
 
  /* Delete the news window */
  CloseWindowById(WC_NEWS_WINDOW, 0);
 
  /* setup forced news item */
  _forced_news = ni;
 
  if (_forced_news != std::end(_news)) {
    CloseWindowById(WC_NEWS_WINDOW, 0);
    ShowNewspaper(&*ni);
  }
}

bool HideActiveNewsMessage()
{
  NewsWindow *w = dynamic_cast<NewsWindow *>(FindWindowById(WC_NEWS_WINDOW, 0));
  if (w == nullptr) return false;
  w->Close();
  return true;
}

void ShowLastNewsMessage()
{
  if (std::empty(_news)) return;
 
  NewsIterator ni;
  if (_forced_news == std::end(_news)) {
    /* Not forced any news yet, show the current one, unless a news window is
     * open (which can only be the current one), then show the previous item */
    if (_current_news == std::end(_news)) {
      /* No news were shown yet resp. the last shown one was already deleted.
       * Treat this as if _forced_news reached the oldest news; so, wrap around and start anew with the latest. */
      ni = std::begin(_news);
    } else {
      const Window *w = FindWindowById(WC_NEWS_WINDOW, 0);
      ni = (w == nullptr || (std::next(_current_news) == std::end(_news))) ? _current_news : std::next(_current_news);
    }
  } else if (std::next(_forced_news) == std::end(_news)) {
    /* We have reached the oldest news, start anew with the latest */
    ni = std::begin(_news);
  } else {
    /* 'Scrolling' through news history show each one in turn */
    ni = std::next(_forced_news);
  }
  bool wrap = false;
  for (;;) {
    if (_news_type_data[to_underlying(ni->type)].GetDisplay() != NewsDisplay::Off) {
      ShowNewsMessage(ni);
      break;
    }
 
    ++ni;
    if (ni == std::end(_news)) {
      if (wrap) break;
      /* We have reached the oldest news, start anew with the latest */
      ni = std::begin(_news);
      wrap = true;
    }
  }
}
 

static void DrawNewsString(uint left, uint right, int y, TextColour colour, const NewsItem &ni)
{
  /* Get the string, replaces newlines with spaces and remove control codes from the string. */
  std::string message = StrMakeValid(ni.GetStatusText(), StringValidationSetting::ReplaceTabCrNlWithSpace);
 
  /* Truncate and show string; postfixed by '...' if necessary */
  DrawString(left, right, y, message, colour);
}
 
struct MessageHistoryWindow : Window {
  int line_height = 0; 
  int date_width = 0; 
 
  Scrollbar *vscroll = nullptr; 
 
  MessageHistoryWindow(WindowDesc &desc) : Window(desc)
  {
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_MH_SCROLLBAR);
    this->FinishInitNested(); // Initializes 'this->line_height' and 'this->date_width'.
    this->OnInvalidateData(0);
  }
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    if (widget == WID_MH_BACKGROUND) {
      this->line_height = GetCharacterHeight(FontSize::Normal) + WidgetDimensions::scaled.vsep_normal;
      fill.height = resize.height = this->line_height;
 
      /* Months are off-by-one, so it's actually 8. Not using
       * month 12 because the 1 is usually less wide. */
      this->date_width = GetStringBoundingBox(GetString(STR_JUST_DATE_TINY, TimerGameCalendar::ConvertYMDToDate(CalendarTime::ORIGINAL_MAX_YEAR, 7, 30))).width + WidgetDimensions::scaled.hsep_wide;
 
      size.height = 4 * resize.height + WidgetDimensions::scaled.framerect.Vertical(); // At least 4 lines are visible.
      size.width = std::max(200u, size.width); // At least 200 pixels wide.
    }
  }
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    if (widget != WID_MH_BACKGROUND || std::empty(_news)) return;
 
    /* Fill the widget with news items. */
    bool rtl = _current_text_dir == TD_RTL;
    Rect news = r.Shrink(WidgetDimensions::scaled.framerect).Indent(this->date_width + WidgetDimensions::scaled.hsep_wide, rtl);
    Rect date = r.Shrink(WidgetDimensions::scaled.framerect).WithWidth(this->date_width, rtl);
    int y = news.top;
 
    auto [first, last] = this->vscroll->GetVisibleRangeIterators(_news);
    for (auto ni = first; ni != last; ++ni) {
      DrawString(date.left, date.right, y, GetString(STR_JUST_DATE_TINY, ni->date), TC_WHITE);
 
      DrawNewsString(news.left, news.right, y, TC_WHITE, *ni);
      y += this->line_height;
    }
  }

  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
  {
    if (!gui_scope) return;
    this->vscroll->SetCount(std::size(_news));
  }
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    if (widget == WID_MH_BACKGROUND) {
      /* Scheduled window invalidations currently occur after the input loop, which means the scrollbar count
       * could be invalid, so ensure it's correct now. Potentially this means that item clicked on might be
       * different as well. */
      this->vscroll->SetCount(std::size(_news));
      auto ni = this->vscroll->GetScrolledItemFromWidget(_news, pt.y, this, widget, WidgetDimensions::scaled.framerect.top);
      if (ni == std::end(_news)) return;
 
      ShowNewsMessage(ni);
    }
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_MH_BACKGROUND, WidgetDimensions::scaled.framerect.Vertical());
  }
};
 
static constexpr std::initializer_list<NWidgetPart> _nested_message_history = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, Colours::Brown),
    NWidget(WWT_CAPTION, Colours::Brown), SetStringTip(STR_MESSAGE_HISTORY, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_SHADEBOX, Colours::Brown),
    NWidget(WWT_DEFSIZEBOX, Colours::Brown),
    NWidget(WWT_STICKYBOX, Colours::Brown),
  EndContainer(),
 
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_PANEL, Colours::Brown, WID_MH_BACKGROUND), SetMinimalSize(200, 125), SetToolTip(STR_MESSAGE_HISTORY_TOOLTIP), SetResize(1, 12), SetScrollbar(WID_MH_SCROLLBAR),
    EndContainer(),
    NWidget(NWID_VERTICAL),
      NWidget(NWID_VSCROLLBAR, Colours::Brown, WID_MH_SCROLLBAR),
      NWidget(WWT_RESIZEBOX, Colours::Brown),
    EndContainer(),
  EndContainer(),
};

static WindowDesc _message_history_desc(
  WindowPosition::Automatic, "list_news", 400, 140,
  WC_MESSAGE_HISTORY, WC_NONE,
  {},
  _nested_message_history
);

void ShowMessageHistory()
{
  CloseWindowById(WC_MESSAGE_HISTORY, 0);
  new MessageHistoryWindow(_message_history_desc);
}