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/* $Id$ */

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/** @file signs_gui.cpp */

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#include "stdafx.h"

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#include "openttd.h"

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#include "table/strings.h"

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#include "table/sprites.h"

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#include "functions.h"

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#include "window.h"

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#include "gui.h"

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#include "gfx.h"

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#include "player.h"

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#include "signs.h"

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#include "strings.h"

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#include "debug.h"

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#include "variables.h"

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#include "helpers.hpp"

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static const Sign **_sign_sort;

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static uint _num_sign_sort;

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static char _bufcache[64];

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static const Sign *_last_sign;

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static int CDECL SignNameSorter(const void *a, const void *b)

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{

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	const Sign *sign0 = *(const Sign**)a;

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	const Sign *sign1 = *(const Sign**)b;

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	char buf1[64];

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	GetString(buf1, sign0->str, lastof(buf1));

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	if (sign1 != _last_sign) {

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		_last_sign = sign1;

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		GetString(_bufcache, sign1->str, lastof(_bufcache));

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	}

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	return strcmp(buf1, _bufcache); // sort by name

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}

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static void GlobalSortSignList()

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{

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	const Sign *si;

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	uint n = 0;

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	/* Create array for sorting */

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	_sign_sort = ReallocT(_sign_sort, GetMaxSignIndex() + 1);

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	if (_sign_sort == NULL) error("Could not allocate memory for the sign-sorting-list");

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	FOR_ALL_SIGNS(si) _sign_sort[n++] = si;

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	_num_sign_sort = n;

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	qsort((void*)_sign_sort, n, sizeof(_sign_sort[0]), SignNameSorter);

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	_sign_sort_dirty = false;

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	DEBUG(misc, 3, "Resorting global signs list");

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}

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static void SignListWndProc(Window *w, WindowEvent *e)

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{

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	switch (e->event) {

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	case WE_PAINT: {

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		int y = 16; // offset from top of widget

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		if (_sign_sort_dirty)

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			GlobalSortSignList();

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		SetVScrollCount(w, _num_sign_sort);

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		SetDParam(0, w->vscroll.count);

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		DrawWindowWidgets(w);

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		/* No signs? */

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		if (w->vscroll.count == 0) {

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			DrawString(2, y, STR_304A_NONE, 0);

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			return;

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		}

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		{

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			uint16 i;

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			/* Start drawing the signs */

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			for (i = w->vscroll.pos; i < w->vscroll.cap + w->vscroll.pos && i < w->vscroll.count; i++) {

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				const Sign *si = _sign_sort[i];

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				if (si->owner != OWNER_NONE)

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					DrawPlayerIcon(si->owner, 4, y + 1);

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				DrawString(22, y, si->str, 8);

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				y += 10;

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			}

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		}

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	} break;

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	case WE_CLICK: {

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		switch (e->we.click.widget) {

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		case 3: {

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			uint32 id_v = (e->we.click.pt.y - 15) / 10;

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			const Sign *si;

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			if (id_v >= w->vscroll.cap)

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				return;

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			id_v += w->vscroll.pos;

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			if (id_v >= w->vscroll.count)

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				return;

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			si = _sign_sort[id_v];

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			ScrollMainWindowToTile(TileVirtXY(si->x, si->y));

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		} break;

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		}

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	} break;

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	case WE_RESIZE:

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		w->vscroll.cap += e->we.sizing.diff.y / 10;

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		break;

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	}

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}

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static const Widget _sign_list_widget[] = {

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{   WWT_CLOSEBOX,   RESIZE_NONE,    14,     0,    10,     0,    13, STR_00C5,              STR_018B_CLOSE_WINDOW},

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{    WWT_CAPTION,  RESIZE_RIGHT,    14,    11,   345,     0,    13, STR_SIGN_LIST_CAPTION, STR_018C_WINDOW_TITLE_DRAG_THIS},

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{  WWT_STICKYBOX,     RESIZE_LR,    14,   346,   357,     0,    13, 0x0,                   STR_STICKY_BUTTON},

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{      WWT_PANEL,     RESIZE_RB,    14,     0,   345,    14,   137, 0x0,                   STR_NULL},

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{  WWT_SCROLLBAR,    RESIZE_LRB,    14,   346,   357,    14,   125, 0x0,                   STR_0190_SCROLL_BAR_SCROLLS_LIST},

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{  WWT_RESIZEBOX,   RESIZE_LRTB,    14,   346,   357,   126,   137, 0x0,                   STR_RESIZE_BUTTON},

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{   WIDGETS_END},

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};

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static const WindowDesc _sign_list_desc = {

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	WDP_AUTO, WDP_AUTO, 358, 138,

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	WC_SIGN_LIST, WC_NONE,

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	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_STICKY_BUTTON | WDF_RESIZABLE,

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	_sign_list_widget,

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	SignListWndProc

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};

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void ShowSignList()

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{

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	Window *w;

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	w = AllocateWindowDescFront(&_sign_list_desc, 0);

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	if (w != NULL) {

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		w->vscroll.cap = 12;

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		w->resize.step_height = 10;

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		w->resize.height = w->height - 10 * 7; // minimum if 5 in the list

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	}

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}