/* $Id: news_gui.c 5210 2006-06-10 08:37:41Z tron $ */

#include "stdafx.h"
#include "openttd.h"
#include "functions.h"
#include "strings.h"
#include "table/sprites.h"
#include "table/strings.h"
#include "window.h"
#include "gui.h"
#include "viewport.h"
#include "gfx.h"
#include "news.h"
#include "vehicle.h"
#include "sound.h"
#include "variables.h"

/* News system
News system is realized as a FIFO queue (in an array)
The positions in the queue can't be rearranged, we only access
the array elements through pointers to the elements. Once the
array is full, the oldest entry (_oldest_news) is being overwritten
by the newest (_latest news).

oldest                   current   lastest
 |                          |         |
[O------------F-------------C---------L           ]
              |
           forced
*/

#define MAX_NEWS 30

#define INVALID_NEWS 255

static NewsItem _news_items[MAX_NEWS];
static byte _current_news = INVALID_NEWS; // points to news item that should be shown next
static byte _oldest_news = 0;    // points to first item in fifo queue
static byte _latest_news = INVALID_NEWS;  // points to last item in fifo queue
/* if the message being shown was forced by the user, its index is stored in
 * _forced_news. forced_news is INVALID_NEWS otherwise.
 * (Users can force messages through history or "last message") */
static byte _forced_news = INVALID_NEWS;

static byte _total_news = 0; // total news count

void DrawNewsNewTrainAvail(Window *w);
void DrawNewsNewRoadVehAvail(Window *w);
void DrawNewsNewShipAvail(Window *w);
void DrawNewsNewAircraftAvail(Window *w);
void DrawNewsBankrupcy(Window *w);
static void MoveToNexItem(void);

StringID GetNewsStringNewTrainAvail(const NewsItem *ni);
StringID GetNewsStringNewRoadVehAvail(const NewsItem *ni);
StringID GetNewsStringNewShipAvail(const NewsItem *ni);
StringID GetNewsStringNewAircraftAvail(const NewsItem *ni);
StringID GetNewsStringBankrupcy(const NewsItem *ni);

static DrawNewsCallbackProc * const _draw_news_callback[] = {
	DrawNewsNewTrainAvail,    /* DNC_TRAINAVAIL */
	DrawNewsNewRoadVehAvail,  /* DNC_ROADAVAIL */
	DrawNewsNewShipAvail,     /* DNC_SHIPAVAIL */
	DrawNewsNewAircraftAvail, /* DNC_AIRCRAFTAVAIL */
	DrawNewsBankrupcy,        /* DNC_BANKRUPCY */
};

GetNewsStringCallbackProc * const _get_news_string_callback[] = {
	GetNewsStringNewTrainAvail,    /* DNC_TRAINAVAIL */
	GetNewsStringNewRoadVehAvail,  /* DNC_ROADAVAIL */
	GetNewsStringNewShipAvail,     /* DNC_SHIPAVAIL */
	GetNewsStringNewAircraftAvail, /* DNC_AIRCRAFTAVAIL */
	GetNewsStringBankrupcy,        /* DNC_BANKRUPCY */
};

void InitNewsItemStructs(void)
{
	memset(_news_items, 0, sizeof(_news_items));
	_current_news = INVALID_NEWS;
	_oldest_news = 0;
	_latest_news = INVALID_NEWS;
	_forced_news = INVALID_NEWS;
	_total_news = 0;
}

void DrawNewsBorder(const Window *w)
{
	int left = 0;
	int right = w->width - 1;
	int top = 0;
	int bottom = w->height - 1;

	GfxFillRect(left, top, right, bottom, 0xF);

	GfxFillRect(left, top, left, bottom, 0xD7);
	GfxFillRect(right, top, right, bottom, 0xD7);
	GfxFillRect(left, top, right, top, 0xD7);
	GfxFillRect(left, bottom, right, bottom, 0xD7);

	DrawString(left + 2, top + 1, STR_00C6, 0);
}

static void NewsWindowProc(Window *w, WindowEvent *e)
{
	switch (e->event) {
	case WE_CREATE: { /* If chatbar is open at creation time, we need to go above it */
		const Window *w1 = FindWindowById(WC_SEND_NETWORK_MSG, 0);
		w->message.msg = (w1 != NULL) ? w1->height : 0;
	} break;

	case WE_PAINT: {
		const NewsItem *ni = WP(w, news_d).ni;
		ViewPort *vp;

		switch (ni->display_mode) {
			case NM_NORMAL:
			case NM_THIN: {
				DrawNewsBorder(w);

				DrawString(2, 1, STR_00C6, 0);

				SetDParam(0, ni->date);
				DrawStringRightAligned(428, 1, STR_01FF, 0);

				if (!(ni->flags & NF_VIEWPORT)) {
					COPY_IN_DPARAM(0, ni->params, lengthof(ni->params));
					DrawStringMultiCenter(215, ni->display_mode == NM_NORMAL ? 76 : 56,
						ni->string_id, 426);
				} else {
					byte bk = _display_opt;
					_display_opt &= ~DO_TRANS_BUILDINGS;
					DrawWindowViewport(w);
					_display_opt = bk;

					/* Shade the viewport into gray, or color*/
					vp = w->viewport;
					GfxFillRect(vp->left - w->left, vp->top - w->top,
						vp->left - w->left + vp->width - 1, vp->top - w->top + vp->height - 1,
						(ni->flags & NF_INCOLOR ? 0x322 : 0x323) | USE_COLORTABLE
					);

					COPY_IN_DPARAM(0, ni->params, lengthof(ni->params));
					DrawStringMultiCenter(w->width / 2, 20, ni->string_id, 428);
				}
				break;
			}

			case NM_CALLBACK: {
				_draw_news_callback[ni->callback](w);
				break;
			}

			default: {
				DrawWindowWidgets(w);
				if (!(ni->flags & NF_VIEWPORT)) {
					COPY_IN_DPARAM(0, ni->params, lengthof(ni->params));
					DrawStringMultiCenter(140, 38, ni->string_id, 276);
				} else {
					DrawWindowViewport(w);
					COPY_IN_DPARAM(0, ni->params, lengthof(ni->params));
					DrawStringMultiCenter(w->width / 2, w->height - 16, ni->string_id, 276);
				}
				break;
			}
		}
	} break;

	case WE_CLICK: {
		switch (e->click.widget) {
		case 1: {
			NewsItem *ni = WP(w, news_d).ni;
			DeleteWindow(w);
			ni->duration = 0;
			_forced_news = INVALID_NEWS;
		} break;
		case 0: {
			NewsItem *ni = WP(w, news_d).ni;
			if (ni->flags & NF_VEHICLE) {
				Vehicle *v = GetVehicle(ni->data_a);
				ScrollMainWindowTo(v->x_pos, v->y_pos);
			} else if (ni->flags & NF_TILE) {
				if (!ScrollMainWindowToTile(ni->data_a) && ni->data_b != 0)
					ScrollMainWindowToTile(ni->data_b);
			}
		} break;
		}
	} break;

	case WE_KEYPRESS:
		if (e->keypress.keycode == WKC_SPACE) {
			// Don't continue.
			e->keypress.cont = false;
			DeleteWindow(w);
		}
		break;

	case WE_MESSAGE: /* The chatbar has notified us that is was either created or closed */
		switch (e->message.msg) {
			case WE_CREATE: w->message.msg = e->message.wparam; break;
			case WE_DESTROY: w->message.msg = 0; break;
		}
		break;

	case WE_TICK: { /* Scroll up newsmessages from the bottom in steps of 4 pixels */
		int diff;
		int y = max(w->top - 4, _screen.height - w->height - 12 - w->message.msg);
		if (y == w->top) return;

		if (w->viewport != NULL)
			w->viewport->top += y - w->top;

		diff = abs(w->top - y);
		w->top = y;

		SetDirtyBlocks(w->left, w->top - diff, w->left + w->width, w->top + w->height);
	} break;
	}
}

// returns the correct index in the array
// (to deal with overflows)
static byte increaseIndex(byte i)
{
	if (i == INVALID_NEWS) return 0;
	i++;
	if (i >= MAX_NEWS) i = i % MAX_NEWS;
	return i;
}

void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b)
{
	NewsItem *ni;
	Window *w;

	if (_game_mode == GM_MENU) return;

	// check the rare case that the oldest (to be overwritten) news item is open
	if (_total_news==MAX_NEWS && (_oldest_news == _current_news || _oldest_news == _forced_news))
		MoveToNexItem();

	_forced_news = INVALID_NEWS;
	if (_total_news < MAX_NEWS) _total_news++;

	// make sure our pointer isn't overflowing
	_latest_news = increaseIndex(_latest_news);

	// overwrite oldest news entry
	if (_oldest_news == _latest_news && _news_items[_oldest_news].string_id != 0)
		_oldest_news = increaseIndex(_oldest_news); // but make sure we're not overflowing here

	// add news to _latest_news
	ni = &_news_items[_latest_news];
	memset(ni, 0, sizeof(*ni));

	ni->string_id = string;
	ni->display_mode = (byte)flags;
	ni->flags = (byte)(flags >> 8) | NF_NOEXPIRE;

	// show this news message in color?
	if (_date >= ConvertIntDate(_patches.colored_news_date))
		ni->flags |= NF_INCOLOR;

	ni->type = (byte)(flags >> 16);
	ni->callback = (byte)(flags >> 24);
	ni->data_a = data_a;
	ni->data_b = data_b;
	ni->date = _date;
	COPY_OUT_DPARAM(ni->params, 0, lengthof(ni->params));

	w = FindWindowById(WC_MESSAGE_HISTORY, 0);
	if (w == NULL) return;
	SetWindowDirty(w);
	w->vscroll.count = _total_news;
}


// don't show item if it's older than x days
static const byte _news_items_age[] = {60, 60, 90, 60, 90, 30, 150, 30, 90, 180};

static const Widget _news_type13_widgets[] = {
{      WWT_PANEL,   RESIZE_NONE,    15,     0,   429,     0,   169, 0x0, STR_NULL},
{      WWT_PANEL,   RESIZE_NONE,    15,     0,    10,     0,    11, 0x0, STR_NULL},
{   WIDGETS_END},
};

static WindowDesc _news_type13_desc = {
	WDP_CENTER, 476, 430, 170,
	WC_NEWS_WINDOW, 0,
	WDF_DEF_WIDGET,
	_news_type13_widgets,
	NewsWindowProc
};

static const Widget _news_type2_widgets[] = {
{      WWT_PANEL,   RESIZE_NONE,    15,     0,   429,     0,   129, 0x0, STR_NULL},
{      WWT_PANEL,   RESIZE_NONE,    15,     0,    10,     0,    11, 0x0, STR_NULL},
{   WIDGETS_END},
};

static WindowDesc _news_type2_desc = {
	WDP_CENTER, 476, 430, 130,
	WC_NEWS_WINDOW, 0,
	WDF_DEF_WIDGET,
	_news_type2_widgets,
	NewsWindowProc
};

static const Widget _news_type0_widgets[] = {
{      WWT_PANEL,   RESIZE_NONE,     5,     0,   279,    14,    86, 0x0,								STR_NULL},
{   WWT_CLOSEBOX,   RESIZE_NONE,     5,     0,    10,     0,    13, STR_00C5,					STR_018B_CLOSE_WINDOW},
{    WWT_CAPTION,   RESIZE_NONE,     5,    11,   279,     0,    13, STR_012C_MESSAGE,	STR_NULL},
{          WWT_6,   RESIZE_NONE,     5,     2,   277,    16,    64, 0x0,								STR_NULL},
{   WIDGETS_END},
};

static WindowDesc _news_type0_desc = {
	WDP_CENTER, 476, 280, 87,
	WC_NEWS_WINDOW, 0,
	WDF_DEF_WIDGET,
	_news_type0_widgets,
	NewsWindowProc
};

static const SoundFx _news_sounds[] = {
	SND_1D_APPLAUSE,
	SND_1D_APPLAUSE,
	0,
	0,
	0,
	0,
	SND_1E_OOOOH,
	0,
	0,
	0
};

/** Get the value of an item of the news-display settings. This is
 * a little tricky since on/off/summary must use 2 bits to store the value
 * @param item the item whose value is requested
 * @return return the found value which is between 0-2
 */
static inline byte GetNewsDisplayValue(byte item)
{
	assert(item < 10 && GB(_news_display_opt, item * 2, 2) <= 2);
	return GB(_news_display_opt, item * 2, 2);
}

/** Set the value of an item in the news-display settings. This is
 * a little tricky since on/off/summary must use 2 bits to store the value
 * @param item the item whose value is being set
 * @param val new value
 */
static inline void SetNewsDisplayValue(byte item, byte val)
{
	assert(item < 10 && val <= 2);
	SB(_news_display_opt, item * 2, 2, val);
}

// open up an own newspaper window for the news item
static void ShowNewspaper(NewsItem *ni)
{
	Window *w;
	SoundFx sound;
	int top;
	ni->flags &= ~(NF_NOEXPIRE | NF_FORCE_BIG);
	ni->duration = 555;

	sound = _news_sounds[ni->type];
	if (sound != 0) SndPlayFx(sound);

	top = _screen.height;
	switch (ni->display_mode) {
		case NM_NORMAL:
		case NM_CALLBACK: {
			_news_type13_desc.top = top;
			w = AllocateWindowDesc(&_news_type13_desc);
			if (ni->flags & NF_VIEWPORT)
				AssignWindowViewport(w, 2, 58, 0x1AA, 0x6E,
					ni->data_a | (ni->flags & NF_VEHICLE ? 0x80000000 : 0), 0);
			break;
		}

		case NM_THIN: {
			_news_type2_desc.top = top;
			w = AllocateWindowDesc(&_news_type2_desc);
			if (ni->flags & NF_VIEWPORT)
				AssignWindowViewport(w, 2, 58, 0x1AA, 0x46,
					ni->data_a | (ni->flags & NF_VEHICLE ? 0x80000000 : 0), 0);
			break;
		}

		default: {
			_news_type0_desc.top = top;
			w = AllocateWindowDesc(&_news_type0_desc);
			if (ni->flags & NF_VIEWPORT)
				AssignWindowViewport(w, 3, 17, 0x112, 0x2F,
					ni->data_a | (ni->flags & NF_VEHICLE ? 0x80000000 : 0), 0);
			break;
		}
	}
	WP(w, news_d).ni = &_news_items[_forced_news == INVALID_NEWS ? _current_news : _forced_news];
	w->flags4 |= WF_DISABLE_VP_SCROLL;
}

// show news item in the ticker
static void ShowTicker(const NewsItem *ni)
{
	Window *w;

	if (_news_ticker_sound) SndPlayFx(SND_16_MORSE);

	_statusbar_news_item = *ni;
	w = FindWindowById(WC_STATUS_BAR, 0);
	if (w != NULL) WP(w, def_d).data_1 = 360;
}


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

	if (item >= MAX_NEWS) return true;
	ni = &_news_items[item];

	// Ticker message
	// Check if the status bar message is still being displayed?
	w = FindWindowById(WC_STATUS_BAR, 0);
	if (w != NULL && WP(w, const def_d).data_1 > -1280) return false;

	// Newspaper message
	// Wait until duration reaches 0
	if (ni->duration != 0) {
		ni->duration--;
		return false;
	}

	// neither newsticker nor newspaper are running
	return true;
}

static void MoveToNexItem(void)
{
	DeleteWindowById(WC_NEWS_WINDOW, 0);
	_forced_news = INVALID_NEWS;

	// if we're not at the last item, than move on
	if (_current_news != _latest_news) {
		NewsItem *ni;

		_current_news = increaseIndex(_current_news);
		ni = &_news_items[_current_news];

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

		switch (GetNewsDisplayValue(ni->type)) {
		case 0: { /* Off - show nothing only a small reminder in the status bar */
			Window* w = FindWindowById(WC_STATUS_BAR, 0);

			if (w != NULL) {
				WP(w, def_d).data_2 = 91;
				SetWindowDirty(w);
			}
			break;
		}

		case 1: /* Summary - show ticker, but if forced big, cascade to full */
			if (!(ni->flags & NF_FORCE_BIG)) {
				ShowTicker(ni);
				break;
			}
			/* Fallthrough */

		case 2: /* Full - show newspaper*/
			ShowNewspaper(ni);
			break;
		}
	}
}

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

	if (ReadyForNextItem()) MoveToNexItem();
}

/* Do a forced show of a specific message */
static void ShowNewsMessage(byte i)
{
	if (_total_news == 0) return;

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

	// setup forced news item
	_forced_news = i;

	if (_forced_news != INVALID_NEWS) {
		NewsItem *ni = &_news_items[_forced_news];
		ni->duration = 555;
		ni->flags |= NF_NOEXPIRE | NF_FORCE_BIG;
		DeleteWindowById(WC_NEWS_WINDOW, 0);
		ShowNewspaper(ni);
	}
}

void ShowLastNewsMessage(void)
{
	if (_forced_news == INVALID_NEWS) {
		ShowNewsMessage(_current_news);
	} else if (_forced_news != 0) {
		ShowNewsMessage(_forced_news - 1);
	} else {
		ShowNewsMessage(_total_news != MAX_NEWS ? _latest_news : MAX_NEWS - 1);
	}
}


/* return news by number, with 0 being the most
recent news. Returns INVALID_NEWS if end of queue reached. */
static byte getNews(byte i)
{
	if (i >= _total_news) return INVALID_NEWS;

	if (_latest_news < i) {
		i = _latest_news + MAX_NEWS - i;
	} else {
		i = _latest_news - i;
	}

	i %= MAX_NEWS;
	return i;
}

/** Draw an unformatted news message truncated to a maximum length. If
 * length exceeds maximum length it will be postfixed by '...'
 * @param x,y position of the string
 * @param color the color the string will be shown in
 * @param *ni NewsItem being printed
 * @param maxw maximum width of string in pixels
 */
static void DrawNewsString(int x, int y, uint16 color, const NewsItem *ni, uint maxw)
{
	char buffer[512], buffer2[512];
	char *ptr, *dest;
	StringID str;

	if (ni->display_mode == 3) {
		str = _get_news_string_callback[ni->callback](ni);
	} else {
		COPY_IN_DPARAM(0, ni->params, lengthof(ni->params));
		str = ni->string_id;
	}

	GetString(buffer, str);
	/* Copy the just gotten string to another buffer to remove any formatting
	 * from it such as big fonts, etc. */
	for (ptr = buffer, dest = buffer2; *ptr != '\0'; ptr++) {
		if (*ptr == '\r') {
			dest[0] = dest[1] = dest[2] = dest[3] = ' ';
			dest += 4;
		} else if ((byte)*ptr >= ' ' && ((byte)*ptr < 0x88 || (byte)*ptr >= 0x99)) {
			*dest++ = *ptr;
		}
	}

	*dest = '\0';
	/* Truncate and show string; postfixed by '...' if neccessary */
	DoDrawStringTruncated(buffer2, x, y, color, maxw);
}


static void MessageHistoryWndProc(Window *w, WindowEvent *e)
{
	switch (e->event) {
	case WE_PAINT: {
		int y = 19;
		byte p, show;

		SetVScrollCount(w, _total_news);
		DrawWindowWidgets(w);

		if (_total_news == 0) break;
		show = min(_total_news, w->vscroll.cap);

		for (p = w->vscroll.pos; p < w->vscroll.pos + show; p++) {
			// get news in correct order
			const NewsItem *ni = &_news_items[getNews(p)];

			SetDParam(0, ni->date);
			DrawString(4, y, STR_SHORT_DATE, 12);

			DrawNewsString(82, y, 12, ni, w->width - 95);
			y += 12;
		}
		break;
	}

	case WE_CLICK:
		switch (e->click.widget) {
		case 3: {
			int y = (e->click.pt.y - 19) / 12;
			byte p, q;

			#if 0 // === DEBUG code only
			for (p = 0; p < _total_news; p++) {
				NewsItem *ni;
				byte buffer[256];
				ni = &_news_items[p];
				GetNewsString(ni, buffer);
				printf("%i\t%i\t%s\n", p, ni->date, buffer);
			}
			printf("=========================\n");
			#endif

			p = y + w->vscroll.pos;
			if (p > _total_news - 1) break;

			if (_latest_news >= p) {
				q = _latest_news - p;
			} else {
				q = _latest_news + MAX_NEWS - p;
			}
			ShowNewsMessage(q);

			break;
		}
		}
		break;

	case WE_RESIZE:
		w->vscroll.cap += e->sizing.diff.y / 12;
		break;
	}
}

static const Widget _message_history_widgets[] = {
{   WWT_CLOSEBOX,   RESIZE_NONE,    13,     0,    10,     0,    13, STR_00C5,			STR_018B_CLOSE_WINDOW},
{    WWT_CAPTION,  RESIZE_RIGHT,    13,    11,   387,     0,    13, STR_MESSAGE_HISTORY,	STR_018C_WINDOW_TITLE_DRAG_THIS},
{  WWT_STICKYBOX,     RESIZE_LR,    13,   388,   399,     0,    13, 0x0,										STR_STICKY_BUTTON},
{     WWT_IMGBTN,     RESIZE_RB,    13,     0,   387,    14,   139, 0x0, STR_MESSAGE_HISTORY_TIP},
{  WWT_SCROLLBAR,    RESIZE_LRB,    13,   388,   399,    14,   127, 0x0, STR_0190_SCROLL_BAR_SCROLLS_LIST},
{  WWT_RESIZEBOX,   RESIZE_LRTB,    13,   388,   399,   128,   139, 0x0, STR_RESIZE_BUTTON},
{   WIDGETS_END},
};

static const WindowDesc _message_history_desc = {
	240, 22, 400, 140,
	WC_MESSAGE_HISTORY, 0,
	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS | WDF_STICKY_BUTTON | WDF_RESIZABLE,
	_message_history_widgets,
	MessageHistoryWndProc
};

void ShowMessageHistory(void)
{
	Window *w;

	DeleteWindowById(WC_MESSAGE_HISTORY, 0);
	w = AllocateWindowDesc(&_message_history_desc);

	if (w != NULL) {
		w->vscroll.cap = 10;
		w->vscroll.count = _total_news;
		w->resize.step_height = 12;
		w->resize.height = w->height - 12 * 6; // minimum of 4 items in the list, each item 12 high
		w->resize.step_width = 1;
		w->resize.width = 200; // can't make window any smaller than 200 pixel
		SetWindowDirty(w);
	}
}

/** 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 3 is the first widget
 * group. These are grouped as [<][>] .. [<][>], etc.
 */
static void SetMessageButtonStates(Window *w, byte value, int element)
{
	element *= 2;
	switch (value) {
	case 0: /* Off */
		SETBIT(w->disabled_state, element + 3);
		CLRBIT(w->disabled_state, element + 3 + 1);
		break;
	case 1: /* Summary */
		CLRBIT(w->disabled_state, element + 3);
		CLRBIT(w->disabled_state, element + 3 + 1);
		break;
	case 2: /* Full */
		SETBIT(w->disabled_state, element + 3 + 1);
		CLRBIT(w->disabled_state, element + 3);
		break;
	default: NOT_REACHED();
	}
}

static void MessageOptionsWndProc(Window *w, WindowEvent *e)
{
	static const StringID message_opt[] = {STR_OFF, STR_SUMMARY, STR_FULL, INVALID_STRING_ID};
	static const uint32 message_val[] = {0x0, 0x55555555, 0xAAAAAAAA}; // 0x555.. = 01010101010101010101 (all summary), 286.. 1010... (full)
	static const uint32 message_dis[] = {
		(1 << 3) | (1 << 5) | (1 << 7) | (1 << 9)  | (1 << 11) | (1 << 13) | (1 << 15) | (1 << 17) | (1 << 19) | (1 << 21),
		0,
		(1 << 4) | (1 << 6) | (1 << 8) | (1 << 10) | (1 << 12) | (1 << 14) | (1 << 16) | (1 << 18) | (1 << 20) | (1 << 22),
	};

	/* WP(w, def_d).data_1 are stores the clicked state of the fake widgets
	 * WP(w, def_d).data_2 stores state of the ALL on/off/summary button */
	switch (e->event) {
	case WE_CREATE: {
		uint32 val = _news_display_opt;
		int i;
		WP(w, def_d).data_1 = WP(w, def_d).data_2 = 0;

		// Set up the initial disabled buttons in the case of 'off' or 'full'
		for (i = 0; i != 10; i++, val >>= 2) SetMessageButtonStates(w, val & 0x3, i);
	} break;

	case WE_PAINT: {
		uint32 val = _news_display_opt;
		int click_state = WP(w, def_d).data_1;
		int i, y;

		if (_news_ticker_sound) SETBIT(w->click_state, 25);
		DrawWindowWidgets(w);
		DrawStringCentered(185, 15, STR_0205_MESSAGE_TYPES, 0);

		/* XXX - Draw the fake widgets-buttons. Can't add these to the widget-desc since
		 * openttd currently can only handle 32 widgets. So hack it *g* */
		for (i = 0, y = 26; i != 10; i++, y += 12, click_state >>= 1, val >>= 2) {
			bool clicked = !!(click_state & 1);

			DrawFrameRect(13, y, 89, 11 + y, 3, (clicked) ? FR_LOWERED : 0);
			DrawStringCentered(((13 + 89 + 1) >> 1) + clicked, ((y + 11 + y + 1) >> 1) - 5 + clicked, message_opt[val & 0x3], 0x10);
			DrawString(103, y + 1, i + STR_0206_ARRIVAL_OF_FIRST_VEHICLE, 0);
		}

		DrawString(  8, y + 9, message_opt[WP(w, def_d).data_2], 0x10);
		DrawString(103, y + 9, STR_MESSAGES_ALL, 0);
		DrawString(103, y + 9 + 12, STR_MESSAGE_SOUND, 0);

	} break;

	case WE_CLICK:
		switch (e->click.widget) {
		case 2: /* Clicked on any of the fake widgets */
			if (e->click.pt.x > 13 && e->click.pt.x < 89 && e->click.pt.y > 26 && e->click.pt.y < 146) {
				int element = (e->click.pt.y - 26) / 12;
				byte val = (GetNewsDisplayValue(element) + 1) % 3;

				SetMessageButtonStates(w, val, element);
				SetNewsDisplayValue(element, val);

				WP(w, def_d).data_1 |= (1 << element);
				w->flags4 |= 5 << WF_TIMEOUT_SHL; // XXX - setup unclick (fake widget)
				SetWindowDirty(w);
			}
			break;
		case 23: case 24: /* Dropdown menu for all settings */
			ShowDropDownMenu(w, message_opt, WP(w, def_d).data_2, 24, 0, 0);
			break;
		case 25: /* Change ticker sound on/off */
			_news_ticker_sound ^= 1;
			TOGGLEBIT(w->click_state, e->click.widget);
			InvalidateWidget(w, e->click.widget);
			break;
		default: { /* Clicked on the [<] .. [>] widgets */
			int wid = e->click.widget;
			if (wid > 2 && wid < 23) {
				int element = (wid - 3) / 2;
				byte val = (GetNewsDisplayValue(element) + ((wid & 1) ? -1 : 1)) % 3;

				SetMessageButtonStates(w, val, element);
				SetNewsDisplayValue(element, val);
				SetWindowDirty(w);
			}
		} break;
		} break;

	case WE_DROPDOWN_SELECT: /* Select all settings for newsmessages */
		WP(w, def_d).data_2 = e->dropdown.index;
		_news_display_opt = message_val[WP(w, def_d).data_2];
		w->disabled_state = message_dis[WP(w, def_d).data_2];
		SetWindowDirty(w);
		break;

	case WE_TIMEOUT: /* XXX - Hack to animate 'fake' buttons */
		WP(w, def_d).data_1 = 0;
		SetWindowDirty(w);
		break;

	}
}

static const Widget _message_options_widgets[] = {
{   WWT_CLOSEBOX,   RESIZE_NONE,    13,     0,   10,     0,    13, STR_00C5,             STR_018B_CLOSE_WINDOW},
{    WWT_CAPTION,   RESIZE_NONE,    13,    11,  409,     0,    13, STR_0204_MESSAGE_OPTIONS, STR_018C_WINDOW_TITLE_DRAG_THIS},
{      WWT_PANEL,   RESIZE_NONE,    13,     0,  409,    14,   184, STR_NULL,             STR_NULL},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,    26,    37, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,    26,    37, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,    38,    49, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,    38,    49, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,    50,    61, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,    50,    61, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,    62,    73, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,    62,    73, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,    74,    85, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,    74,    85, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,    86,    97, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,    86,    97, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,    98,   109, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,    98,   109, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,   110,   121, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,   110,   121, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,   122,   133, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,   122,   133, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,     4,   12,   134,   145, SPR_ARROW_LEFT,       STR_HSCROLL_BAR_SCROLLS_LIST},
{ WWT_PUSHIMGBTN,   RESIZE_NONE,     3,    90,   98,   134,   145, SPR_ARROW_RIGHT,      STR_HSCROLL_BAR_SCROLLS_LIST},

{      WWT_PANEL,   RESIZE_NONE,     3,     4,   86,   154,   165, STR_NULL,             STR_NULL},
{    WWT_TEXTBTN,   RESIZE_NONE,     3,    87,   98,   154,   165, STR_0225,             STR_NULL},
{          WWT_4,   RESIZE_NONE,     3,     4,   98,   166,   177, STR_02DB_OFF,         STR_NULL},

{   WIDGETS_END},
};

static const WindowDesc _message_options_desc = {
	270, 22, 410, 185,
	WC_GAME_OPTIONS, 0,
	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS,
	_message_options_widgets,
	MessageOptionsWndProc
};

void ShowMessageOptions(void)
{
	DeleteWindowById(WC_GAME_OPTIONS, 0);
	AllocateWindowDesc(&_message_options_desc);
}


void DeleteVehicleNews(VehicleID vid, StringID news)
{
	byte n;

	for (n = _oldest_news; _latest_news != INVALID_NEWS && n != (_latest_news + 1) % MAX_NEWS; n = (n + 1) % MAX_NEWS) {
		const NewsItem* ni = &_news_items[n];

		if (ni->flags & NF_VEHICLE &&
				ni->data_a == vid &&
				(news == INVALID_STRING_ID || ni->string_id == news)) {
			Window* w;
			byte i;

			if (_forced_news  == n) MoveToNexItem();
			if (_current_news == n) MoveToNexItem();

			// If this is the last news item, invalidate _latest_news
			if (_latest_news == _oldest_news) _latest_news = INVALID_NEWS;

			for (i = n; i != _oldest_news; i = (i + MAX_NEWS - 1) % MAX_NEWS) {
				_news_items[i] = _news_items[(i + MAX_NEWS - 1) % MAX_NEWS];
			}
			_oldest_news = (_oldest_news + 1) % MAX_NEWS;
			_total_news--;

			w = FindWindowById(WC_MESSAGE_HISTORY, 0);
			if (w != NULL) {
				SetWindowDirty(w);
				w->vscroll.count = _total_news;
			}
		}
	}
}
