(svn r23005) -Fix (r23004): Of course there's still the 16-sprite version for shore...

[openttd/fttd.git] / src / news_gui.cpp

/* $Id$ */

/*
 * 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/>.
 */

/** @file news_gui.cpp GUI functions related to news messages. */

#include "stdafx.h"
#include "gui.h"
#include "viewport_func.h"
#include "news_type.h"
#include "strings_func.h"
#include "window_func.h"
#include "date_func.h"
#include "vehicle_base.h"
#include "vehicle_func.h"
#include "vehicle_gui.h"
#include "station_base.h"
#include "industry.h"
#include "town.h"
#include "sound_func.h"
#include "string_func.h"
#include "widgets/dropdown_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 "table/strings.h"

const NewsItem *_statusbar_news_item = NULL;
bool _news_ticker_sound; ///< Make a ticker sound when a news item is published.

static uint MIN_NEWS_AMOUNT = 30;           ///< prefered minimum amount of news messages
static uint _total_news = 0;                ///< current number of news items
static NewsItem *_oldest_news = NULL;       ///< head of news items queue
static NewsItem *_latest_news = NULL;       ///< tail of news items queue

/**
 * Forced news item.
 * Users can force an item by accessing the history or "last message".
 * If the message being shown was forced by the user, a pointer is stored
 * in _forced_news. Otherwise, \a _forced_news variable is NULL.
 */
static const NewsItem *_forced_news = NULL;       ///< item the user has asked for

/** Current news item (last item shown regularly). */
static const NewsItem *_current_news = NULL;


/**
 * Get the position a news-reference is referencing.
 * @param reftype The type of reference.
 * @param ref     The reference.
 * @return A tile for the referenced object, or INVALID_TILE if none.
 */
static TileIndex GetReferenceTile(NewsReferenceType reftype, uint32 ref)
{
        switch (reftype) {
                case NR_TILE:     return (TileIndex)ref;
                case NR_STATION:  return Station::Get((StationID)ref)->xy;
                case NR_INDUSTRY: return Industry::Get((IndustryID)ref)->location.tile + TileDiffXY(1, 1);
                case NR_TOWN:     return Town::Get((TownID)ref)->xy;
                default:          return INVALID_TILE;
        }
}

/** Widget numbers of the news display windows. */
enum NewsTypeWidgets {
        NTW_PANEL,       ///< The news item background panel.
        NTW_TITLE,       ///< Title of the company news.
        NTW_HEADLINE,    ///< The news headline.
        NTW_CLOSEBOX,    ///< Close the window.
        NTW_DATE,        ///< Date of the news item.
        NTW_CAPTION,     ///< Title bar of the window. Only used in small news items.
        NTW_INSET,       ///< Inset around the viewport in the window. Only used in small news items.
        NTW_VIEWPORT,    ///< Viewport in the window.
        NTW_COMPANY_MSG, ///< Message in company news items.
        NTW_MESSAGE,     ///< Space for displaying the message. Only used in small news items.
        NTW_MGR_FACE,    ///< Face of the manager.
        NTW_MGR_NAME,    ///< Name of the manager.
        NTW_VEH_TITLE,   ///< Vehicle new title.
        NTW_VEH_BKGND,   ///< Dark background of new vehicle news.
        NTW_VEH_NAME,    ///< Name of the new vehicle.
        NTW_VEH_SPR,     ///< Graphical display of the new vehicle.
        NTW_VEH_INFO,    ///< Some technical data of the new vehicle.
};

/* Normal news items. */
static const NWidgetPart _nested_normal_news_widgets[] = {
        NWidget(WWT_PANEL, COLOUR_WHITE, NTW_PANEL),
                NWidget(NWID_HORIZONTAL), SetPadding(1, 1, 0, 1),
                        NWidget(WWT_TEXT, COLOUR_WHITE, NTW_CLOSEBOX), SetDataTip(STR_SILVER_CROSS, STR_NULL), SetPadding(0, 0, 0, 1),
                        NWidget(NWID_SPACER), SetFill(1, 0),
                        NWidget(NWID_VERTICAL),
                                NWidget(WWT_LABEL, COLOUR_WHITE, NTW_DATE), SetDataTip(STR_DATE_LONG_SMALL, STR_NULL),
                                NWidget(NWID_SPACER), SetFill(0, 1),
                        EndContainer(),
                EndContainer(),
                NWidget(WWT_EMPTY, COLOUR_WHITE, NTW_MESSAGE), SetMinimalSize(428, 154), SetPadding(0, 1, 1, 1),
        EndContainer(),
};

static const WindowDesc _normal_news_desc(
        WDP_MANUAL, 0, 0,
        WC_NEWS_WINDOW, WC_NONE,
        0,
        _nested_normal_news_widgets, lengthof(_nested_normal_news_widgets)
);

/* New vehicles news items. */
static const NWidgetPart _nested_vehicle_news_widgets[] = {
        NWidget(WWT_PANEL, COLOUR_WHITE, NTW_PANEL),
                NWidget(NWID_HORIZONTAL), SetPadding(1, 1, 0, 1),
                        NWidget(NWID_VERTICAL),
                                NWidget(WWT_TEXT, COLOUR_WHITE, NTW_CLOSEBOX), SetDataTip(STR_SILVER_CROSS, STR_NULL), SetPadding(0, 0, 0, 1),
                                NWidget(NWID_SPACER), SetFill(0, 1),
                        EndContainer(),
                        NWidget(WWT_LABEL, COLOUR_WHITE, NTW_VEH_TITLE), SetFill(1, 1), SetMinimalSize(419, 55), SetDataTip(STR_EMPTY, STR_NULL),
                EndContainer(),
                NWidget(WWT_PANEL, COLOUR_WHITE, NTW_VEH_BKGND), SetPadding(0, 25, 1, 25),
                        NWidget(NWID_VERTICAL),
                                NWidget(WWT_EMPTY, INVALID_COLOUR, NTW_VEH_NAME), SetMinimalSize(369, 33), SetFill(1, 0),
                                NWidget(WWT_EMPTY, INVALID_COLOUR, NTW_VEH_SPR),  SetMinimalSize(369, 32), SetFill(1, 0),
                                NWidget(WWT_EMPTY, INVALID_COLOUR, NTW_VEH_INFO), SetMinimalSize(369, 46), SetFill(1, 0),
                        EndContainer(),
                EndContainer(),
        EndContainer(),
};

static const WindowDesc _vehicle_news_desc(
        WDP_MANUAL, 0, 0,
        WC_NEWS_WINDOW, WC_NONE,
        0,
        _nested_vehicle_news_widgets, lengthof(_nested_vehicle_news_widgets)
);

/* Company news items. */
static const NWidgetPart _nested_company_news_widgets[] = {
        NWidget(WWT_PANEL, COLOUR_WHITE, NTW_PANEL),
                NWidget(NWID_HORIZONTAL), SetPadding(1, 1, 0, 1),
                        NWidget(NWID_VERTICAL),
                                NWidget(WWT_TEXT, COLOUR_WHITE, NTW_CLOSEBOX), SetDataTip(STR_SILVER_CROSS, STR_NULL), SetPadding(0, 0, 0, 1),
                                NWidget(NWID_SPACER), SetFill(0, 1),
                        EndContainer(),
                        NWidget(WWT_LABEL, COLOUR_WHITE, NTW_TITLE), SetFill(1, 1), SetMinimalSize(410, 20), SetDataTip(STR_EMPTY, STR_NULL),
                EndContainer(),
                NWidget(NWID_HORIZONTAL), SetPadding(0, 1, 1, 1),
                        NWidget(NWID_VERTICAL),
                                NWidget(WWT_EMPTY, COLOUR_WHITE, NTW_MGR_FACE), SetMinimalSize(93, 119), SetPadding(2, 6, 2, 1),
                                NWidget(NWID_HORIZONTAL),
                                        NWidget(WWT_EMPTY, COLOUR_WHITE, NTW_MGR_NAME), SetMinimalSize(93, 24), SetPadding(0, 0, 0, 1),
                                        NWidget(NWID_SPACER), SetFill(1, 0),
                                EndContainer(),
                                NWidget(NWID_SPACER), SetFill(0, 1),
                        EndContainer(),
                        NWidget(WWT_EMPTY, COLOUR_WHITE, NTW_COMPANY_MSG), SetFill(1, 1), SetMinimalSize(328, 150),
                EndContainer(),
        EndContainer(),
};

static const WindowDesc _company_news_desc(
        WDP_MANUAL, 0, 0,
        WC_NEWS_WINDOW, WC_NONE,
        0,
        _nested_company_news_widgets, lengthof(_nested_company_news_widgets)
);

/* Thin news items. */
static const NWidgetPart _nested_thin_news_widgets[] = {
        NWidget(WWT_PANEL, COLOUR_WHITE, NTW_PANEL),
                NWidget(NWID_HORIZONTAL), SetPadding(1, 1, 0, 1),
                        NWidget(WWT_TEXT, COLOUR_WHITE, NTW_CLOSEBOX), SetDataTip(STR_SILVER_CROSS, STR_NULL), SetPadding(0, 0, 0, 1),
                        NWidget(NWID_SPACER), SetFill(1, 0),
                        NWidget(NWID_VERTICAL),
                                NWidget(WWT_LABEL, COLOUR_WHITE, NTW_DATE), SetDataTip(STR_DATE_LONG_SMALL, STR_NULL),
                                NWidget(NWID_SPACER), SetFill(0, 1),
                        EndContainer(),
                EndContainer(),
                NWidget(WWT_EMPTY, COLOUR_WHITE, NTW_MESSAGE), SetMinimalSize(428, 48), SetFill(1, 0), SetPadding(0, 1, 0, 1),
                NWidget(NWID_VIEWPORT, INVALID_COLOUR, NTW_VIEWPORT), SetMinimalSize(426, 70), SetPadding(1, 2, 2, 2),
        EndContainer(),
};

static const WindowDesc _thin_news_desc(
        WDP_MANUAL, 0, 0,
        WC_NEWS_WINDOW, WC_NONE,
        0,
        _nested_thin_news_widgets, lengthof(_nested_thin_news_widgets)
);

/* Small news items. */
static const NWidgetPart _nested_small_news_widgets[] = {
        /* Caption + close box. The caption is no WWT_CAPTION as the window shall not be moveable and so on. */
        NWidget(NWID_HORIZONTAL),
                NWidget(WWT_CLOSEBOX, COLOUR_LIGHT_BLUE, NTW_CLOSEBOX),
                NWidget(WWT_EMPTY, COLOUR_LIGHT_BLUE, NTW_CAPTION), SetFill(1, 0),
        EndContainer(),

        /* Main part */
        NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, NTW_HEADLINE),
                NWidget(WWT_INSET, COLOUR_LIGHT_BLUE, NTW_INSET), SetPadding(2, 2, 2, 2),
                        NWidget(NWID_VIEWPORT, INVALID_COLOUR, NTW_VIEWPORT), SetPadding(1, 1, 1, 1), SetMinimalSize(274, 47), SetFill(1, 0),
                EndContainer(),
                NWidget(WWT_EMPTY, COLOUR_WHITE, NTW_MESSAGE), SetMinimalSize(275, 20), SetFill(1, 0),
        EndContainer(),
};

static const WindowDesc _small_news_desc(
        WDP_MANUAL, 0, 0,
        WC_NEWS_WINDOW, WC_NONE,
        0,
        _nested_small_news_widgets, lengthof(_nested_small_news_widgets)
);

/**
 * Data common to all news items of a given subtype (structure)
 */
struct NewsSubtypeData {
        NewsType type;          ///< News category @see NewsType
        NewsFlag flags;         ///< Initial NewsFlags bits @see NewsFlag
        const WindowDesc *desc; ///< Window description for displaying this news.
};

/**
 * Data common to all news items of a given subtype (actual data)
 */
static const NewsSubtypeData _news_subtype_data[] = {
        /* type,               display_mode, flags,                         window description,            callback */
        { NT_ARRIVAL_COMPANY,  (NF_NO_TRANSPARENT | NF_SHADE), &_thin_news_desc    }, ///< NS_ARRIVAL_COMPANY
        { NT_ARRIVAL_OTHER,    (NF_NO_TRANSPARENT | NF_SHADE), &_thin_news_desc    }, ///< NS_ARRIVAL_OTHER
        { NT_ACCIDENT,         (NF_NO_TRANSPARENT | NF_SHADE), &_thin_news_desc    }, ///< NS_ACCIDENT
        { NT_COMPANY_INFO,     NF_NONE,                        &_company_news_desc }, ///< NS_COMPANY_TROUBLE
        { NT_COMPANY_INFO,     NF_NONE,                        &_company_news_desc }, ///< NS_COMPANY_MERGER
        { NT_COMPANY_INFO,     NF_NONE,                        &_company_news_desc }, ///< NS_COMPANY_BANKRUPT
        { NT_COMPANY_INFO,     NF_NONE,                        &_company_news_desc }, ///< NS_COMPANY_NEW
        { NT_INDUSTRY_OPEN,    (NF_NO_TRANSPARENT | NF_SHADE), &_thin_news_desc    }, ///< NS_INDUSTRY_OPEN
        { NT_INDUSTRY_CLOSE,   (NF_NO_TRANSPARENT | NF_SHADE), &_thin_news_desc    }, ///< NS_INDUSTRY_CLOSE
        { NT_ECONOMY,          NF_NONE,                        &_normal_news_desc  }, ///< NS_ECONOMY
        { NT_INDUSTRY_COMPANY, (NF_NO_TRANSPARENT | NF_SHADE), &_thin_news_desc    }, ///< NS_INDUSTRY_COMPANY
        { NT_INDUSTRY_OTHER,   (NF_NO_TRANSPARENT | NF_SHADE), &_thin_news_desc    }, ///< NS_INDUSTRY_OTHER
        { NT_INDUSTRY_NOBODY,  (NF_NO_TRANSPARENT | NF_SHADE), &_thin_news_desc    }, ///< NS_INDUSTRY_NOBODY
        { NT_ADVICE,           NF_INCOLOUR,                    &_small_news_desc   }, ///< NS_ADVICE
        { NT_NEW_VEHICLES,     NF_NONE,                        &_vehicle_news_desc }, ///< NS_NEW_VEHICLES
        { NT_ACCEPTANCE,       NF_INCOLOUR,                    &_small_news_desc   }, ///< NS_ACCEPTANCE
        { NT_SUBSIDIES,        NF_NONE,                        &_normal_news_desc  }, ///< NS_SUBSIDIES
        { NT_GENERAL,          NF_NONE,                        &_normal_news_desc  }, ///< NS_GENERAL
};

assert_compile(lengthof(_news_subtype_data) == NS_END);

/**
 * Per-NewsType data
 */
NewsTypeData _news_type_data[] = {
        /*            name,              age, sound,           display,    description */
        NewsTypeData("arrival_player",    60, SND_1D_APPLAUSE, ND_FULL,    STR_NEWS_MESSAGE_TYPE_ARRIVAL_OF_FIRST_VEHICLE_OWN       ),  ///< NT_ARRIVAL_COMPANY
        NewsTypeData("arrival_other",     60, SND_1D_APPLAUSE, ND_SUMMARY, STR_NEWS_MESSAGE_TYPE_ARRIVAL_OF_FIRST_VEHICLE_OTHER     ),  ///< NT_ARRIVAL_OTHER
        NewsTypeData("accident",          90, SND_BEGIN,       ND_FULL,    STR_NEWS_MESSAGE_TYPE_ACCIDENTS_DISASTERS                ),  ///< NT_ACCIDENT
        NewsTypeData("company_info",      60, SND_BEGIN,       ND_FULL,    STR_NEWS_MESSAGE_TYPE_COMPANY_INFORMATION                ),  ///< NT_COMPANY_INFO
        NewsTypeData("open",              90, SND_BEGIN,       ND_SUMMARY, STR_NEWS_MESSAGE_TYPE_INDUSTRY_OPEN                      ),  ///< NT_INDUSTRY_OPEN
        NewsTypeData("close",             90, SND_BEGIN,       ND_SUMMARY, STR_NEWS_MESSAGE_TYPE_INDUSTRY_CLOSE                     ),  ///< NT_INDUSTRY_CLOSE
        NewsTypeData("economy",           30, SND_BEGIN,       ND_FULL,    STR_NEWS_MESSAGE_TYPE_ECONOMY_CHANGES                    ),  ///< NT_ECONOMY
        NewsTypeData("production_player", 30, SND_BEGIN,       ND_SUMMARY, STR_NEWS_MESSAGE_TYPE_INDUSTRY_CHANGES_SERVED_BY_COMPANY ),  ///< NT_INDUSTRY_COMPANY
        NewsTypeData("production_other",  30, SND_BEGIN,       ND_OFF,     STR_NEWS_MESSAGE_TYPE_INDUSTRY_CHANGES_SERVED_BY_OTHER   ),  ///< NT_INDUSTRY_OTHER
        NewsTypeData("production_nobody", 30, SND_BEGIN,       ND_OFF,     STR_NEWS_MESSAGE_TYPE_INDUSTRY_CHANGES_UNSERVED          ),  ///< NT_INDUSTRY_NOBODY
        NewsTypeData("advice",           150, SND_BEGIN,       ND_FULL,    STR_NEWS_MESSAGE_TYPE_ADVICE_INFORMATION_ON_COMPANY      ),  ///< NT_ADVICE
        NewsTypeData("new_vehicles",      30, SND_1E_OOOOH,    ND_FULL,    STR_NEWS_MESSAGE_TYPE_NEW_VEHICLES                       ),  ///< NT_NEW_VEHICLES
        NewsTypeData("acceptance",        90, SND_BEGIN,       ND_FULL,    STR_NEWS_MESSAGE_TYPE_CHANGES_OF_CARGO_ACCEPTANCE        ),  ///< NT_ACCEPTANCE
        NewsTypeData("subsidies",        180, SND_BEGIN,       ND_SUMMARY, STR_NEWS_MESSAGE_TYPE_SUBSIDIES                          ),  ///< NT_SUBSIDIES
        NewsTypeData("general",           60, SND_BEGIN,       ND_FULL,    STR_NEWS_MESSAGE_TYPE_GENERAL_INFORMATION                ),  ///< NT_GENERAL
};

assert_compile(lengthof(_news_type_data) == NT_END);

/** Window class displaying a news item. */
struct NewsWindow : Window {
        uint16 chat_height;   ///< Height of the chat window.
        uint16 status_height; ///< Height of the status bar window
        const NewsItem *ni;   ///< News item to display.
        static uint duration; ///< Remaining time for showing current news message (may only be accessed while a news item is displayed).

        NewsWindow(const WindowDesc *desc, const NewsItem *ni) : Window(), ni(ni)
        {
                NewsWindow::duration = 555;
                const Window *w = FindWindowByClass(WC_SEND_NETWORK_MSG);
                this->chat_height = (w != NULL) ? w->height : 0;
                this->status_height = FindWindowById(WC_STATUS_BAR, 0)->height;

                this->flags4 |= WF_DISABLE_VP_SCROLL;

                this->CreateNestedTree(desc);
                switch (this->ni->subtype) {
                        case NS_COMPANY_TROUBLE:
                                this->GetWidget<NWidgetCore>(NTW_TITLE)->widget_data = STR_NEWS_COMPANY_IN_TROUBLE_TITLE;
                                break;

                        case NS_COMPANY_MERGER:
                                this->GetWidget<NWidgetCore>(NTW_TITLE)->widget_data = STR_NEWS_COMPANY_MERGER_TITLE;
                                break;

                        case NS_COMPANY_BANKRUPT:
                                this->GetWidget<NWidgetCore>(NTW_TITLE)->widget_data = STR_NEWS_COMPANY_BANKRUPT_TITLE;
                                break;

                        case NS_COMPANY_NEW:
                                this->GetWidget<NWidgetCore>(NTW_TITLE)->widget_data = STR_NEWS_COMPANY_LAUNCH_TITLE;
                                break;

                        default:
                                break;
                }
                this->FinishInitNested(desc, 0);

                /* Initialize viewport if it exists. */
                NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(NTW_VIEWPORT);
                if (nvp != NULL) {
                        nvp->InitializeViewport(this, ni->reftype1 == NR_VEHICLE ? 0x80000000 | ni->ref1 : GetReferenceTile(ni->reftype1, ni->ref1), ZOOM_LVL_NEWS);
                        if (this->ni->flags & NF_NO_TRANSPARENT) nvp->disp_flags |= ND_NO_TRANSPARENCY;
                        if ((this->ni->flags & NF_INCOLOUR) == 0) {
                                nvp->disp_flags |= ND_SHADE_GREY;
                        } else if (this->ni->flags & NF_SHADE) {
                                nvp->disp_flags |= ND_SHADE_DIMMED;
                        }
                }

                PositionNewsMessage(this);
        }

        void DrawNewsBorder(const Rect &r) const
        {
                GfxFillRect(r.left,  r.top,    r.right, r.bottom, PC_WHITE);

                GfxFillRect(r.left,  r.top,    r.left,  r.bottom, PC_BLACK);
                GfxFillRect(r.right, r.top,    r.right, r.bottom, PC_BLACK);
                GfxFillRect(r.left,  r.top,    r.right, r.top,    PC_BLACK);
                GfxFillRect(r.left,  r.bottom, r.right, r.bottom, PC_BLACK);
        }

        virtual Point OnInitialPosition(const WindowDesc *desc, int16 sm_width, int16 sm_height, int window_number)
        {
                Point pt = { 0, _screen.height };
                return pt;
        }

        virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
        {
                StringID str = STR_NULL;
                switch (widget) {
                        case NTW_MESSAGE:
                                CopyInDParam(0, this->ni->params, lengthof(this->ni->params));
                                str = this->ni->string_id;
                                break;

                        case NTW_COMPANY_MSG:
                                str = this->GetCompanyMessageString();
                                break;

                        case NTW_VEH_NAME:
                        case NTW_VEH_TITLE:
                                str = this->GetNewVehicleMessageString(widget);
                                break;

                        case NTW_VEH_INFO: {
                                assert(this->ni->reftype1 == NR_ENGINE);
                                EngineID engine = this->ni->ref1;
                                str = GetEngineInfoString(engine);
                                break;
                        }
                        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);
                d.width += padding.width;
                d.height += padding.height;
                *size = maxdim(*size, d);
        }

        virtual void SetStringParameters(int widget) const
        {
                if (widget == NTW_DATE) SetDParam(0, this->ni->date);
        }

        virtual void DrawWidget(const Rect &r, int widget) const
        {
                switch (widget) {
                        case NTW_CAPTION:
                                DrawCaption(r, COLOUR_LIGHT_BLUE, this->owner, STR_NEWS_MESSAGE_CAPTION);
                                break;

                        case NTW_PANEL:
                                this->DrawNewsBorder(r);
                                break;

                        case NTW_MESSAGE:
                                CopyInDParam(0, this->ni->params, lengthof(this->ni->params));
                                DrawStringMultiLine(r.left + 2, r.right - 2, r.top, r.bottom, this->ni->string_id, TC_FROMSTRING, SA_CENTER);
                                break;

                        case NTW_MGR_FACE: {
                                const CompanyNewsInformation *cni = (const CompanyNewsInformation*)this->ni->free_data;
                                DrawCompanyManagerFace(cni->face, cni->colour, r.left, r.top);
                                GfxFillRect(r.left + 1, r.top, r.left + 1 + 91, r.top + 118, PALETTE_NEWSPAPER, FILLRECT_RECOLOUR);
                                break;
                        }
                        case NTW_MGR_NAME: {
                                const CompanyNewsInformation *cni = (const CompanyNewsInformation*)this->ni->free_data;
                                SetDParamStr(0, cni->president_name);
                                DrawStringMultiLine(r.left, r.right, r.top, r.bottom, STR_JUST_RAW_STRING, TC_FROMSTRING, SA_CENTER);
                                break;
                        }
                        case NTW_COMPANY_MSG:
                                DrawStringMultiLine(r.left, r.right, r.top, r.bottom, this->GetCompanyMessageString(), TC_FROMSTRING, SA_CENTER);
                                break;

                        case NTW_VEH_BKGND:
                                GfxFillRect(r.left, r.top, r.right, r.bottom, PC_GREY);
                                break;

                        case NTW_VEH_NAME:
                        case NTW_VEH_TITLE:
                                DrawStringMultiLine(r.left, r.right, r.top, r.bottom, this->GetNewVehicleMessageString(widget), TC_FROMSTRING, SA_CENTER);
                                break;

                        case NTW_VEH_SPR: {
                                assert(this->ni->reftype1 == NR_ENGINE);
                                EngineID engine = this->ni->ref1;
                                DrawVehicleEngine(r.left, r.right, (r.left + r.right) / 2, (r.top + r.bottom) / 2, engine, GetEnginePalette(engine, _local_company));
                                GfxFillRect(r.left, r.top, r.right, r.bottom, PALETTE_NEWSPAPER, FILLRECT_RECOLOUR);
                                break;
                        }
                        case NTW_VEH_INFO: {
                                assert(this->ni->reftype1 == NR_ENGINE);
                                EngineID engine = this->ni->ref1;
                                DrawStringMultiLine(r.left, r.right, r.top, r.bottom, GetEngineInfoString(engine), TC_FROMSTRING, SA_CENTER);
                                break;
                        }
                }
        }

        virtual void OnClick(Point pt, int widget, int click_count)
        {
                switch (widget) {
                        case NTW_CLOSEBOX:
                                NewsWindow::duration = 0;
                                delete this;
                                _forced_news = NULL;
                                break;

                        case NTW_CAPTION:
                                if (this->ni->reftype1 == NR_VEHICLE) {
                                        const Vehicle *v = Vehicle::Get(this->ni->ref1);
                                        ShowVehicleViewWindow(v);
                                }
                                break;

                        case NTW_VIEWPORT:
                                break; // Ignore clicks

                        default:
                                if (this->ni->reftype1 == NR_VEHICLE) {
                                        const Vehicle *v = Vehicle::Get(this->ni->ref1);
                                        ScrollMainWindowTo(v->x_pos, v->y_pos, v->z_pos);
                                } else {
                                        TileIndex tile1 = GetReferenceTile(this->ni->reftype1, this->ni->ref1);
                                        TileIndex tile2 = GetReferenceTile(this->ni->reftype2, 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;
                }
        }

        virtual EventState OnKeyPress(uint16 key, uint16 keycode)
        {
                if (keycode == WKC_SPACE) {
                        /* Don't continue. */
                        delete this;
                        return ES_HANDLED;
                }
                return ES_NOT_HANDLED;
        }

        /**
         * Some data on this window has become invalid.
         * @param data Information about the changed data.
         * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
         */
        virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
        {
                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);
        }

        virtual void OnTick()
        {
                /* Scroll up newsmessages from the bottom in steps of 4 pixels */
                int newtop = max(this->top - 4, _screen.height - this->height - this->status_height - this->chat_height);
                this->SetWindowTop(newtop);
        }

private:
        /**
         * Moves the window so #newtop is new 'top' coordinate. Makes screen dirty where needed.
         * @param newtop new top coordinate
         */
        void SetWindowTop(int newtop)
        {
                if (this->top == newtop) return;

                int mintop = min(newtop, this->top);
                int maxtop = max(newtop, this->top);
                if (this->viewport != NULL) this->viewport->top += newtop - this->top;
                this->top = newtop;

                SetDirtyBlocks(this->left, mintop, this->left + this->width, maxtop + this->height);
        }

        StringID GetCompanyMessageString() const
        {
                switch (this->ni->subtype) {
                        case NS_COMPANY_TROUBLE:
                                SetDParam(0, this->ni->params[2]);
                                return STR_NEWS_COMPANY_IN_TROUBLE_DESCRIPTION;

                        case NS_COMPANY_MERGER:
                                SetDParam(0, this->ni->params[2]);
                                SetDParam(1, this->ni->params[3]);
                                SetDParam(2, this->ni->params[4]);
                                return this->ni->params[4] == 0 ? STR_NEWS_MERGER_TAKEOVER_TITLE : STR_NEWS_COMPANY_MERGER_DESCRIPTION;

                        case NS_COMPANY_BANKRUPT:
                                SetDParam(0, this->ni->params[2]);
                                return STR_NEWS_COMPANY_BANKRUPT_DESCRIPTION;

                        case NS_COMPANY_NEW:
                                SetDParam(0, this->ni->params[2]);
                                SetDParam(1, this->ni->params[3]);
                                return STR_NEWS_COMPANY_LAUNCH_DESCRIPTION;

                        default:
                                NOT_REACHED();
                }
        }

        StringID GetNewVehicleMessageString(int widget) const
        {
                assert(this->ni->reftype1 == NR_ENGINE);
                EngineID engine = this->ni->ref1;

                switch (widget) {
                        case NTW_VEH_TITLE:
                                SetDParam(0, GetEngineCategoryName(engine));
                                return STR_NEWS_NEW_VEHICLE_NOW_AVAILABLE;

                        case NTW_VEH_NAME:
                                SetDParam(0, engine);
                                return STR_NEWS_NEW_VEHICLE_TYPE;

                        default:
                                NOT_REACHED();
                }
        }
};

/* static */ uint NewsWindow::duration = 0; // Instance creation.


/** Open up an own newspaper window for the news item */
static void ShowNewspaper(const NewsItem *ni)
{
        SoundFx sound = _news_type_data[_news_subtype_data[ni->subtype].type].sound;
        if (sound != 0) SndPlayFx(sound);

        new NewsWindow(_news_subtype_data[ni->subtype].desc, ni);
}

/** Show news item in the ticker */
static void ShowTicker(const NewsItem *ni)
{
        if (_news_ticker_sound) SndPlayFx(SND_16_MORSE);

        _statusbar_news_item = ni;
        InvalidateWindowData(WC_STATUS_BAR, 0, SBI_SHOW_TICKER);
}

/** Initialize the news-items data structures */
void InitNewsItemStructs()
{
        for (NewsItem *ni = _oldest_news; ni != NULL; ) {
                NewsItem *next = ni->next;
                delete ni;
                ni = next;
        }

        _total_news = 0;
        _oldest_news = NULL;
        _latest_news = NULL;
        _forced_news = NULL;
        _current_news = NULL;
        _statusbar_news_item = NULL;
        NewsWindow::duration = 0;
}

/**
 * Are we ready to show another news item?
 * Only if nothing is in the newsticker and no newspaper is displayed
 */
static bool ReadyForNextItem()
{
        const NewsItem *ni = _forced_news == NULL ? _current_news : _forced_news;
        if (ni == NULL) return true;

        /* Ticker message
         * Check if the status bar message is still being displayed? */
        if (IsNewsTickerShown()) return false;

        /* Newspaper message, decrement duration counter */
        if (NewsWindow::duration != 0) NewsWindow::duration--;

        /* neither newsticker nor newspaper are running */
        return (NewsWindow::duration == 0 || FindWindowById(WC_NEWS_WINDOW, 0) == NULL);
}

/** Move to the next news item */
static void MoveToNextItem()
{
        InvalidateWindowData(WC_STATUS_BAR, 0, SBI_NEWS_DELETED); // invalidate the statusbar
        DeleteWindowById(WC_NEWS_WINDOW, 0); // close the newspapers window if shown
        _forced_news = NULL;
        _statusbar_news_item = NULL;

        /* if we're not at the last item, then move on */
        if (_current_news != _latest_news) {
                _current_news = (_current_news == NULL) ? _oldest_news : _current_news->next;
                const NewsItem *ni = _current_news;
                const NewsType type = _news_subtype_data[ni->subtype].type;

                /* check the date, don't show too old items */
                if (_date - _news_type_data[type].age > ni->date) return;

                switch (_news_type_data[type].display) {
                        default: NOT_REACHED();
                        case ND_OFF: // Off - show nothing only a small reminder in the status bar
                                InvalidateWindowData(WC_STATUS_BAR, 0, SBI_SHOW_REMINDER);
                                break;

                        case ND_SUMMARY: // Summary - show ticker
                                ShowTicker(ni);
                                break;

                        case ND_FULL: // Full - show newspaper
                                ShowNewspaper(ni);
                                break;
                }
        }
}

/**
 * Add a new newsitem to be shown.
 * @param string String to display
 * @param subtype news category, any of the NewsSubtype enums (NS_)
 * @param reftype1 Type of ref1
 * @param ref1     Reference 1 to some object: Used for a possible viewport, scrolling after clicking on the news, and for deleteing the news when the object is deleted.
 * @param reftype2 Type of ref2
 * @param ref2     Reference 2 to some object: Used for scrolling after clicking on the news, and for deleteing the news when the object is deleted.
 * @param free_data Pointer to data that must be freed once the news message is cleared
 *
 * @see NewsSubtype
 */
void AddNewsItem(StringID string, NewsSubtype subtype, NewsReferenceType reftype1, uint32 ref1, NewsReferenceType reftype2, uint32 ref2, void *free_data)
{
        if (_game_mode == GM_MENU) return;

        /* Create new news item node */
        NewsItem *ni = new NewsItem;

        ni->string_id = string;
        ni->subtype = subtype;
        ni->flags = _news_subtype_data[subtype].flags;

        /* show this news message in colour? */
        if (_cur_year >= _settings_client.gui.coloured_news_year) ni->flags |= NF_INCOLOUR;

        ni->reftype1 = reftype1;
        ni->reftype2 = reftype2;
        ni->ref1 = ref1;
        ni->ref2 = ref2;
        ni->free_data = free_data;
        ni->date = _date;
        CopyOutDParam(ni->params, 0, lengthof(ni->params));

        if (_total_news++ == 0) {
                assert(_oldest_news == NULL);
                _oldest_news = ni;
                ni->prev = NULL;
        } else {
                assert(_latest_news->next == NULL);
                _latest_news->next = ni;
                ni->prev = _latest_news;
        }

        ni->next = NULL;
        _latest_news = ni;

        SetWindowDirty(WC_MESSAGE_HISTORY, 0);
}

/** Delete a news item from the queue */
static void DeleteNewsItem(NewsItem *ni)
{
        /* Delete the news from the news queue. */
        if (ni->prev != NULL) {
                ni->prev->next = ni->next;
        } else {
                assert(_oldest_news == ni);
                _oldest_news = ni->next;
        }

        if (ni->next != NULL) {
                ni->next->prev = ni->prev;
        } else {
                assert(_latest_news == ni);
                _latest_news = ni->prev;
        }

        _total_news--;

        if (_forced_news == ni || _current_news == ni || _statusbar_news_item == ni) {
                /* When we're the current news, go to the previous item first;
                 * we just possibly made that the last news item. */
                if (_current_news == ni) _current_news = ni->prev;

                /* About to remove the currently forced item (shown as newspapers) ||
                 * about to remove the currently displayed item (newspapers, ticker, or just a reminder) */
                MoveToNextItem();
        }

        delete ni;

        SetWindowDirty(WC_MESSAGE_HISTORY, 0);
}

/**
 * Delete a news item type about a vehicle.
 * When the news item type is INVALID_STRING_ID all news about the vehicle gets deleted.
 * @param vid  The vehicle to remove the news for.
 * @param news The news type to remove.
 */
void DeleteVehicleNews(VehicleID vid, StringID news)
{
        NewsItem *ni = _oldest_news;

        while (ni != NULL) {
                NewsItem *next = ni->next;
                if (((ni->reftype1 == NR_VEHICLE && ni->ref1 == vid) || (ni->reftype2 == NR_VEHICLE && ni->ref2 == vid)) &&
                                (news == INVALID_STRING_ID || ni->string_id == news)) {
                        DeleteNewsItem(ni);
                }
                ni = next;
        }
}

/**
 * Remove news regarding given station so there are no 'unknown station now accepts Mail'
 * or 'First train arrived at unknown station' news items.
 * @param sid station to remove news about
 */
void DeleteStationNews(StationID sid)
{
        NewsItem *ni = _oldest_news;

        while (ni != NULL) {
                NewsItem *next = ni->next;
                if ((ni->reftype1 == NR_STATION && ni->ref1 == sid) || (ni->reftype2 == NR_STATION && ni->ref2 == sid)) {
                        DeleteNewsItem(ni);
                }
                ni = next;
        }
}

/**
 * Remove news regarding given industry
 * @param iid industry to remove news about
 */
void DeleteIndustryNews(IndustryID iid)
{
        NewsItem *ni = _oldest_news;

        while (ni != NULL) {
                NewsItem *next = ni->next;
                if ((ni->reftype1 == NR_INDUSTRY && ni->ref1 == iid) || (ni->reftype2 == NR_INDUSTRY && ni->ref2 == iid)) {
                        DeleteNewsItem(ni);
                }
                ni = next;
        }
}

/**
 * Remove engine announcements for invalid engines.
 */
void DeleteInvalidEngineNews()
{
        NewsItem *ni = _oldest_news;

        while (ni != NULL) {
                NewsItem *next = ni->next;
                if ((ni->reftype1 == NR_ENGINE && (!Engine::IsValidID(ni->ref1) || !Engine::Get(ni->ref1)->IsEnabled())) ||
                                (ni->reftype2 == NR_ENGINE && (!Engine::IsValidID(ni->ref2) || !Engine::Get(ni->ref2)->IsEnabled()))) {
                        DeleteNewsItem(ni);
                }
                ni = next;
        }
}

static void RemoveOldNewsItems()
{
        NewsItem *next;
        for (NewsItem *cur = _oldest_news; _total_news > MIN_NEWS_AMOUNT && cur != NULL; cur = next) {
                next = cur->next;
                if (_date - _news_type_data[_news_subtype_data[cur->subtype].type].age * _settings_client.gui.news_message_timeout > cur->date) DeleteNewsItem(cur);
        }
}

/**
 * Report a change in vehicle IDs (due to autoreplace) to affected vehicle news.
 * @note Viewports of currently displayed news is changed via #ChangeVehicleViewports
 * @param from_index the old vehicle ID
 * @param to_index the new vehicle ID
 */
void ChangeVehicleNews(VehicleID from_index, VehicleID to_index)
{
        for (NewsItem *ni = _oldest_news; ni != NULL; ni = ni->next) {
                if (ni->reftype1 == NR_VEHICLE && ni->ref1 == from_index) ni->ref1 = to_index;
                if (ni->reftype2 == NR_VEHICLE && ni->ref2 == from_index) ni->ref2 = to_index;

                /* Oh noes :(
                 * Autoreplace is breaking the whole news-reference concept here, as we want to keep the news,
                 * but do not know which DParams to change.
                 *
                 * Currently only NS_ADVICE news have vehicle IDs in their DParams.
                 * And all NS_ADVICE news have the ID in param 0.
                 */
                if (ni->subtype == NS_ADVICE && ni->params[0] == from_index) ni->params[0] = to_index;
        }
}

void NewsLoop()
{
        /* no news item yet */
        if (_total_news == 0) return;

        /* 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) == NULL) return;

        static byte _last_clean_month = 0;

        if (_last_clean_month != _cur_month) {
                RemoveOldNewsItems();
                _last_clean_month = _cur_month;
        }

        if (ReadyForNextItem()) MoveToNextItem();
}

/** Do a forced show of a specific message */
static void ShowNewsMessage(const NewsItem *ni)
{
        assert(_total_news != 0);

        /* Delete the news window */
        DeleteWindowById(WC_NEWS_WINDOW, 0);

        /* setup forced news item */
        _forced_news = ni;

        if (_forced_news != NULL) {
                DeleteWindowById(WC_NEWS_WINDOW, 0);
                ShowNewspaper(ni);
        }
}

/** Show previous news item */
void ShowLastNewsMessage()
{
        if (_total_news == 0) {
                return;
        } else if (_forced_news == NULL) {
                /* 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 */
                const Window *w = FindWindowById(WC_NEWS_WINDOW, 0);
                ShowNewsMessage((w == NULL || (_current_news == _oldest_news)) ? _current_news : _current_news->prev);
        } else if (_forced_news == _oldest_news) {
                /* We have reached the oldest news, start anew with the latest */
                ShowNewsMessage(_latest_news);
        } else {
                /* 'Scrolling' through news history show each one in turn */
                ShowNewsMessage(_forced_news->prev);
        }
}


/**
 * Draw an unformatted news message truncated to a maximum length. If
 * length exceeds maximum length it will be postfixed by '...'
 * @param left  the left most location for the string
 * @param right the right most location for the string
 * @param y position of the string
 * @param colour the colour the string will be shown in
 * @param *ni NewsItem being printed
 * @param maxw maximum width of string in pixels
 */
static void DrawNewsString(uint left, uint right, int y, TextColour colour, const NewsItem *ni)
{
        char buffer[512], buffer2[512];
        StringID str;

        CopyInDParam(0, ni->params, lengthof(ni->params));
        str = ni->string_id;

        GetString(buffer, str, lastof(buffer));
        /* Copy the just gotten string to another buffer to remove any formatting
         * from it such as big fonts, etc. */
        const char *ptr = buffer;
        char *dest = buffer2;
        WChar c_last = '\0';
        for (;;) {
                WChar c = Utf8Consume(&ptr);
                if (c == 0) break;
                /* Make a space from a newline, but ignore multiple newlines */
                if (c == '\n' && c_last != '\n') {
                        dest[0] = ' ';
                        dest++;
                } else if (c == '\r') {
                        dest[0] = dest[1] = dest[2] = dest[3] = ' ';
                        dest += 4;
                } else if (IsPrintable(c)) {
                        dest += Utf8Encode(dest, c);
                }
                c_last = c;
        }

        *dest = '\0';
        /* Truncate and show string; postfixed by '...' if neccessary */
        DrawString(left, right, y, buffer2, colour);
}

/** Widget numbers of the message history window. */
enum MessageHistoryWidgets {
        MHW_STICKYBOX,
        MHW_BACKGROUND,
        MHW_SCROLLBAR,
};

struct MessageHistoryWindow : Window {
        static const int top_spacing;    ///< Additional spacing at the top of the #MHW_BACKGROUND widget.
        static const int bottom_spacing; ///< Additional spacing at the bottom of the #MHW_BACKGROUND widget.

        int line_height; /// < Height of a single line in the news histoy window including spacing.
        int date_width;  /// < Width needed for the date part.

        Scrollbar *vscroll;

        MessageHistoryWindow(const WindowDesc *desc) : Window()
        {
                this->CreateNestedTree(desc);
                this->vscroll = this->GetScrollbar(MHW_SCROLLBAR);
                this->FinishInitNested(desc); // Initializes 'this->line_height' and 'this->date_width'.
                this->OnInvalidateData(0);
        }

        virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
        {
                if (widget == MHW_BACKGROUND) {
                        this->line_height = FONT_HEIGHT_NORMAL + 2;
                        resize->height = this->line_height;

                        SetDParam(0, ConvertYMDToDate(ORIGINAL_MAX_YEAR, 12, 30));
                        this->date_width = GetStringBoundingBox(STR_SHORT_DATE).width;

                        size->height = 4 * resize->height + this->top_spacing + this->bottom_spacing; // At least 4 lines are visible.
                        size->width = max(200u, size->width); // At least 200 pixels wide.
                }
        }

        virtual void OnPaint()
        {
                this->OnInvalidateData(0);
                this->DrawWidgets();
        }

        virtual void DrawWidget(const Rect &r, int widget) const
        {
                if (widget != MHW_BACKGROUND || _total_news == 0) return;

                /* Find the first news item to display. */
                NewsItem *ni = _latest_news;
                for (int n = this->vscroll->GetPosition(); n > 0; n--) {
                        ni = ni->prev;
                        if (ni == NULL) return;
                }

                /* Fill the widget with news items. */
                int y = r.top + this->top_spacing;
                bool rtl = _current_text_dir == TD_RTL;
                uint date_left  = rtl ? r.right - WD_FRAMERECT_RIGHT - this->date_width : r.left + WD_FRAMERECT_LEFT;
                uint date_right = rtl ? r.right - WD_FRAMERECT_RIGHT : r.left + WD_FRAMERECT_LEFT + this->date_width;
                uint news_left  = rtl ? r.left + WD_FRAMERECT_LEFT : r.left + WD_FRAMERECT_LEFT + this->date_width + WD_FRAMERECT_RIGHT;
                uint news_right = rtl ? r.right - WD_FRAMERECT_RIGHT - this->date_width - WD_FRAMERECT_RIGHT : r.right - WD_FRAMERECT_RIGHT;
                for (int n = this->vscroll->GetCapacity(); n > 0; n--) {
                        SetDParam(0, ni->date);
                        DrawString(date_left, date_right, y, STR_SHORT_DATE);

                        DrawNewsString(news_left, news_right, y, TC_WHITE, ni);
                        y += this->line_height;

                        ni = ni->prev;
                        if (ni == NULL) return;
                }
        }

        /**
         * Some data on this window has become invalid.
         * @param data Information about the changed data.
         * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
         */
        virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
        {
                if (!gui_scope) return;
                this->vscroll->SetCount(_total_news);
        }

        virtual void OnClick(Point pt, int widget, int click_count)
        {
                if (widget == MHW_BACKGROUND) {
                        NewsItem *ni = _latest_news;
                        if (ni == NULL) return;

                        for (int n = this->vscroll->GetScrolledRowFromWidget(pt.y, this, MHW_BACKGROUND, WD_FRAMERECT_TOP, this->line_height); n > 0; n--) {
                                ni = ni->prev;
                                if (ni == NULL) return;
                        }

                        ShowNewsMessage(ni);
                }
        }

        virtual void OnResize()
        {
                this->vscroll->SetCapacity(this->GetWidget<NWidgetBase>(MHW_BACKGROUND)->current_y / this->line_height);
        }
};

const int MessageHistoryWindow::top_spacing = WD_FRAMERECT_TOP + 4;
const int MessageHistoryWindow::bottom_spacing = WD_FRAMERECT_BOTTOM;

static const NWidgetPart _nested_message_history[] = {
        NWidget(NWID_HORIZONTAL),
                NWidget(WWT_CLOSEBOX, COLOUR_BROWN),
                NWidget(WWT_CAPTION, COLOUR_BROWN), SetDataTip(STR_MESSAGE_HISTORY, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
                NWidget(WWT_SHADEBOX, COLOUR_BROWN),
                NWidget(WWT_STICKYBOX, COLOUR_BROWN),
        EndContainer(),

        NWidget(NWID_HORIZONTAL),
                NWidget(WWT_PANEL, COLOUR_BROWN, MHW_BACKGROUND), SetMinimalSize(200, 125), SetDataTip(0x0, STR_MESSAGE_HISTORY_TOOLTIP), SetResize(1, 12), SetScrollbar(MHW_SCROLLBAR),
                EndContainer(),
                NWidget(NWID_VERTICAL),
                        NWidget(NWID_VSCROLLBAR, COLOUR_BROWN, MHW_SCROLLBAR),
                        NWidget(WWT_RESIZEBOX, COLOUR_BROWN),
                EndContainer(),
        EndContainer(),
};

static const WindowDesc _message_history_desc(
        WDP_AUTO, 400, 140,
        WC_MESSAGE_HISTORY, WC_NONE,
        WDF_UNCLICK_BUTTONS,
        _nested_message_history, lengthof(_nested_message_history)
);

/** Display window with news messages history */
void ShowMessageHistory()
{
        DeleteWindowById(WC_MESSAGE_HISTORY, 0);
        new MessageHistoryWindow(&_message_history_desc);
}

/** Constants in the message options window. */
enum MessageOptionsSpace {
        MOS_WIDG_PER_SETTING      = 4,  ///< Number of widgets needed for each news category, starting at widget #WIDGET_NEWSOPT_START_OPTION.

        MOS_LEFT_EDGE             = 6,  ///< Number of pixels between left edge of the window and the options buttons column.
        MOS_COLUMN_SPACING        = 4,  ///< Number of pixels between the buttons and the description columns.
        MOS_RIGHT_EDGE            = 6,  ///< Number of pixels between right edge of the window and the options descriptions column.
        MOS_BUTTON_SPACE          = 10, ///< Additional space in the button with the option value (for better looks).

        MOS_ABOVE_GLOBAL_SETTINGS = 6,  ///< Number of vertical pixels between the categories and the global options.
        MOS_BOTTOM_EDGE           = 6,  ///< Number of pixels between bottom edge of the window and bottom of the global options.
};

/** Message options widget numbers. */
enum MessageOptionWidgets {
        WIDGET_NEWSOPT_BACKGROUND,        ///< Background widget.
        WIDGET_NEWSOPT_LABEL,             ///< Top label.
        WIDGET_NEWSOPT_DROP_SUMMARY,      ///< Dropdown that adjusts at once the level for all settings.
        WIDGET_NEWSOPT_LABEL_SUMMARY,     ///< Label of the summary drop down.
        WIDGET_NEWSOPT_SOUNDTICKER,       ///< Button for (de)activating sound on events.
        WIDGET_NEWSOPT_SOUNDTICKER_LABEL, ///< Label of the soundticker button,

        WIDGET_NEWSOPT_START_OPTION,      ///< First widget that is part of a group [<][label][>] [description]
        WIDGET_NEWSOPT_END_OPTION = WIDGET_NEWSOPT_START_OPTION + NT_END * MOS_WIDG_PER_SETTING, ///< First widget after the groups.
};

struct MessageOptionsWindow : Window {
        static const StringID message_opt[]; ///< Message report options, 'off', 'summary', or 'full'.
        int state;                           ///< Option value for setting all categories at once.
        Dimension dim_message_opt;           ///< Amount of space needed for a label such that all labels will fit.

        MessageOptionsWindow(const WindowDesc *desc) : Window()
        {
                this->InitNested(desc);
                /* Set up the initial disabled buttons in the case of 'off' or 'full' */
                NewsDisplay all_val = _news_type_data[0].display;
                for (int i = 0; i < NT_END; i++) {
                        this->SetMessageButtonStates(_news_type_data[i].display, i);
                        /* If the value doesn't match the ALL-button value, set the ALL-button value to 'off' */
                        if (_news_type_data[i].display != all_val) all_val = ND_OFF;
                }
                /* If all values are the same value, the ALL-button will take over this value */
                this->state = all_val;
                this->OnInvalidateData(0);
        }

        /**
         * Setup the disabled/enabled buttons in the message window
         * If the value is 'off' disable the [<] widget, and enable the [>] one
         * Same-wise for all the others. Starting value of 4 is the first widget
         * group. These are grouped as [<][>] .. [<][>], etc.
         * @param value to set in the widget
         * @param element index of the group of widget to set
         */
        void SetMessageButtonStates(byte value, int element)
        {
                element *= MOS_WIDG_PER_SETTING;

                this->SetWidgetDisabledState(element + WIDGET_NEWSOPT_START_OPTION, value == 0);
                this->SetWidgetDisabledState(element + WIDGET_NEWSOPT_START_OPTION + 2, value == 2);
        }

        virtual void DrawWidget(const Rect &r, int widget) const
        {
                if (widget >= WIDGET_NEWSOPT_START_OPTION && widget < WIDGET_NEWSOPT_END_OPTION && (widget -  WIDGET_NEWSOPT_START_OPTION) % MOS_WIDG_PER_SETTING == 1) {
                        /* Draw the string of each setting on each button. */
                        int i = (widget -  WIDGET_NEWSOPT_START_OPTION) / MOS_WIDG_PER_SETTING;
                        DrawString(r.left, r.right, r.top + 2, this->message_opt[_news_type_data[i].display], TC_BLACK, SA_HOR_CENTER);
                }
        }

        virtual void OnInit()
        {
                this->dim_message_opt.width  = 0;
                this->dim_message_opt.height = 0;
                for (const StringID *str = message_opt; *str != INVALID_STRING_ID; str++) this->dim_message_opt = maxdim(this->dim_message_opt, GetStringBoundingBox(*str));
        }

        virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
        {
                if (widget >= WIDGET_NEWSOPT_START_OPTION && widget < WIDGET_NEWSOPT_END_OPTION) {
                        /* Height is the biggest widget height in a row. */
                        size->height = FONT_HEIGHT_NORMAL + max(WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM, WD_IMGBTN_TOP + WD_IMGBTN_BOTTOM);

                        /* Compute width for the label widget only. */
                        if ((widget - WIDGET_NEWSOPT_START_OPTION) % MOS_WIDG_PER_SETTING == 1) {
                                size->width = this->dim_message_opt.width + padding.width + MOS_BUTTON_SPACE; // A bit extra for better looks.
                        }
                        return;
                }

                /* Size computations for global message options. */
                if (widget == WIDGET_NEWSOPT_DROP_SUMMARY || widget == WIDGET_NEWSOPT_LABEL_SUMMARY || widget == WIDGET_NEWSOPT_SOUNDTICKER || widget == WIDGET_NEWSOPT_SOUNDTICKER_LABEL) {
                        /* Height is the biggest widget height in a row. */
                        size->height = FONT_HEIGHT_NORMAL + max(WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM, WD_DROPDOWNTEXT_TOP + WD_DROPDOWNTEXT_BOTTOM);

                        if (widget == WIDGET_NEWSOPT_DROP_SUMMARY) {
                                size->width = this->dim_message_opt.width + padding.width + MOS_BUTTON_SPACE; // A bit extra for better looks.
                        } else if (widget == WIDGET_NEWSOPT_SOUNDTICKER) {
                                size->width += MOS_BUTTON_SPACE; // A bit extra for better looks.
                        }
                        return;
                }
        }

        /**
         * Some data on this window has become invalid.
         * @param data Information about the changed data.
         * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
         */
        virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
        {
                if (!gui_scope) return;
                /* Update the dropdown value for 'set all categories'. */
                this->GetWidget<NWidgetCore>(WIDGET_NEWSOPT_DROP_SUMMARY)->widget_data = this->message_opt[this->state];

                /* Update widget to reflect the value of the #_news_ticker_sound variable. */
                this->SetWidgetLoweredState(WIDGET_NEWSOPT_SOUNDTICKER, _news_ticker_sound);
        }

        virtual void OnClick(Point pt, int widget, int click_count)
        {
                switch (widget) {
                        case WIDGET_NEWSOPT_DROP_SUMMARY: // Dropdown menu for all settings
                                ShowDropDownMenu(this, this->message_opt, this->state, WIDGET_NEWSOPT_DROP_SUMMARY, 0, 0);
                                break;

                        case WIDGET_NEWSOPT_SOUNDTICKER: // Change ticker sound on/off
                                _news_ticker_sound ^= 1;
                                this->InvalidateData();
                                break;

                        default: { // Clicked on the [<] .. [>] widgets
                                if (widget >= WIDGET_NEWSOPT_START_OPTION && widget < WIDGET_NEWSOPT_END_OPTION) {
                                        int wid = widget - WIDGET_NEWSOPT_START_OPTION;
                                        int element = wid / MOS_WIDG_PER_SETTING;
                                        byte val = (_news_type_data[element].display + ((wid % MOS_WIDG_PER_SETTING) ? 1 : -1)) % 3;

                                        this->SetMessageButtonStates(val, element);
                                        _news_type_data[element].display = (NewsDisplay)val;
                                        this->SetDirty();
                                }
                                break;
                        }
                }
        }

        virtual void OnDropdownSelect(int widget, int index)
        {
                this->state = index;

                for (int i = 0; i < NT_END; i++) {
                        this->SetMessageButtonStates(index, i);
                        _news_type_data[i].display = (NewsDisplay)index;
                }
                this->InvalidateData();
        }
};

const StringID MessageOptionsWindow::message_opt[] = {STR_NEWS_MESSAGES_OFF, STR_NEWS_MESSAGES_SUMMARY, STR_NEWS_MESSAGES_FULL, INVALID_STRING_ID};

/** Make a column with the buttons for changing each news category setting, and the global settings. */
static NWidgetBase *MakeButtonsColumn(int *biggest_index)
{
        NWidgetVertical *vert_buttons = new NWidgetVertical;

        /* Top-part of the column, one row for each new category. */
        int widnum = WIDGET_NEWSOPT_START_OPTION;
        for (int i = 0; i < NT_END; i++) {
                NWidgetHorizontal *hor = new NWidgetHorizontal;
                /* [<] button. */
                NWidgetLeaf *leaf = new NWidgetLeaf(WWT_PUSHARROWBTN, COLOUR_YELLOW, widnum, AWV_DECREASE, STR_TOOLTIP_HSCROLL_BAR_SCROLLS_LIST);
                leaf->SetFill(1, 1);
                hor->Add(leaf);
                /* Label. */
                leaf = new NWidgetLeaf(WWT_PUSHTXTBTN, COLOUR_YELLOW, widnum + 1, STR_EMPTY, STR_NULL);
                leaf->SetFill(1, 1);
                hor->Add(leaf);
                /* [>] button. */
                leaf = new NWidgetLeaf(WWT_PUSHARROWBTN, COLOUR_YELLOW, widnum + 2, AWV_INCREASE, STR_TOOLTIP_HSCROLL_BAR_SCROLLS_LIST);
                leaf->SetFill(1, 1);
                hor->Add(leaf);
                vert_buttons->Add(hor);

                widnum += MOS_WIDG_PER_SETTING;
        }
        *biggest_index = widnum - MOS_WIDG_PER_SETTING + 2;

        /* Space between the category buttons and the global settings buttons. */
        NWidgetSpacer *spacer = new NWidgetSpacer(0, MOS_ABOVE_GLOBAL_SETTINGS);
        vert_buttons->Add(spacer);

        /* Bottom part of the column with buttons for global changes. */
        NWidgetLeaf *leaf = new NWidgetLeaf(WWT_DROPDOWN, COLOUR_YELLOW, WIDGET_NEWSOPT_DROP_SUMMARY, STR_EMPTY, STR_NULL);
        leaf->SetFill(1, 1);
        vert_buttons->Add(leaf);

        leaf = new NWidgetLeaf(WWT_TEXTBTN_2, COLOUR_YELLOW, WIDGET_NEWSOPT_SOUNDTICKER, STR_STATION_BUILD_COVERAGE_OFF, STR_NULL);
        leaf->SetFill(1, 1);
        vert_buttons->Add(leaf);

        *biggest_index = max(*biggest_index, max<int>(WIDGET_NEWSOPT_DROP_SUMMARY, WIDGET_NEWSOPT_SOUNDTICKER));
        return vert_buttons;
}

/** Make a column with descriptions for each news category and the global settings. */
static NWidgetBase *MakeDescriptionColumn(int *biggest_index)
{
        NWidgetVertical *vert_desc = new NWidgetVertical;

        /* Top-part of the column, one row for each new category. */
        int widnum = WIDGET_NEWSOPT_START_OPTION;
        for (int i = 0; i < NT_END; i++) {
                NWidgetHorizontal *hor = new NWidgetHorizontal;

                /* Descriptive text. */
                NWidgetLeaf *leaf = new NWidgetLeaf(WWT_TEXT, COLOUR_YELLOW, widnum + 3, _news_type_data[i].description, STR_NULL);
                hor->Add(leaf);
                /* Filling empty space to push text to the left. */
                NWidgetSpacer *spacer = new NWidgetSpacer(0, 0);
                spacer->SetFill(1, 0);
                hor->Add(spacer);
                vert_desc->Add(hor);

                widnum += MOS_WIDG_PER_SETTING;
        }
        *biggest_index = widnum - MOS_WIDG_PER_SETTING + 3;

        /* Space between the category descriptions and the global settings descriptions. */
        NWidgetSpacer *spacer = new NWidgetSpacer(0, MOS_ABOVE_GLOBAL_SETTINGS);
        vert_desc->Add(spacer);

        /* Bottom part of the column with descriptions of global changes. */
        NWidgetHorizontal *hor = new NWidgetHorizontal;
        NWidgetLeaf *leaf = new NWidgetLeaf(WWT_TEXT, COLOUR_YELLOW, WIDGET_NEWSOPT_LABEL_SUMMARY, STR_NEWS_MESSAGES_ALL, STR_NULL);
        hor->Add(leaf);
        /* Filling empty space to push text to the left. */
        spacer = new NWidgetSpacer(0, 0);
        spacer->SetFill(1, 0);
        hor->Add(spacer);
        vert_desc->Add(hor);

        hor = new NWidgetHorizontal;
        leaf = new NWidgetLeaf(WWT_TEXT, COLOUR_YELLOW, WIDGET_NEWSOPT_SOUNDTICKER_LABEL, STR_NEWS_MESSAGES_SOUND, STR_NULL);
        hor->Add(leaf);
        /* Filling empty space to push text to the left. */
        spacer = new NWidgetSpacer(0, 0);
        leaf->SetFill(1, 0);
        hor->Add(spacer);
        vert_desc->Add(hor);

        *biggest_index = max(*biggest_index, max<int>(WIDGET_NEWSOPT_LABEL_SUMMARY, WIDGET_NEWSOPT_SOUNDTICKER_LABEL));
        return vert_desc;
}

static const NWidgetPart _nested_message_options_widgets[] = {
        NWidget(NWID_HORIZONTAL),
                NWidget(WWT_CLOSEBOX, COLOUR_BROWN),
                NWidget(WWT_CAPTION, COLOUR_BROWN), SetDataTip(STR_NEWS_MESSAGE_OPTIONS_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
        EndContainer(),
        NWidget(WWT_PANEL, COLOUR_BROWN, WIDGET_NEWSOPT_BACKGROUND),
                NWidget(NWID_HORIZONTAL),
                        NWidget(NWID_SPACER), SetFill(1, 0),
                        NWidget(WWT_LABEL, COLOUR_BROWN, WIDGET_NEWSOPT_LABEL), SetMinimalSize(0, 14), SetDataTip(STR_NEWS_MESSAGE_TYPES, STR_NULL),
                        NWidget(NWID_SPACER), SetFill(1, 0),
                EndContainer(),
                NWidget(NWID_HORIZONTAL),
                        NWidget(NWID_SPACER), SetMinimalSize(MOS_LEFT_EDGE, 0),
                        NWidgetFunction(MakeButtonsColumn),
                        NWidget(NWID_SPACER), SetMinimalSize(MOS_COLUMN_SPACING, 0),
                        NWidgetFunction(MakeDescriptionColumn),
                        NWidget(NWID_SPACER), SetMinimalSize(MOS_RIGHT_EDGE, 0),
                EndContainer(),
                NWidget(NWID_SPACER), SetMinimalSize(0, MOS_BOTTOM_EDGE),
        EndContainer(),
};

static const WindowDesc _message_options_desc(
        WDP_AUTO, 0, 0,
        WC_GAME_OPTIONS, WC_NONE,
        WDF_UNCLICK_BUTTONS,
        _nested_message_options_widgets, lengthof(_nested_message_options_widgets)
);

/**
 * Show the settings window for news messages.
 */
void ShowMessageOptions()
{
        DeleteWindowById(WC_GAME_OPTIONS, 0);
        new MessageOptionsWindow(&_message_options_desc);
}