(svn r17612) -Feature: possibility to choose (randomise or enter custom) town name before its creation (original patch by Terkhen)

9 files changed, 272 insertions, 132 deletions

diff --git a/src/lang/english.txt b/src/lang/english.txt
index 57288994d..7642db8c6 100644
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -2033,6 +2033,12 @@ STR_FOUND_TOWN_RANDOM_TOWN_TOOLTIP                              :{BLACK}Found to
 STR_FOUND_TOWN_MANY_RANDOM_TOWNS                                :{BLACK}Many random towns
 STR_FOUND_TOWN_RANDOM_TOWNS_TOOLTIP                             :{BLACK}Cover the map with randomly placed towns
 
+STR_FOUND_TOWN_NAME_TITLE                                       :{YELLOW}Town name:
+STR_FOUND_TOWN_NAME_EDITOR_TITLE                                :{BLACK}Enter town name
+STR_FOUND_TOWN_NAME_EDITOR_HELP                                 :{BLACK}Click to enter town name
+STR_FOUND_TOWN_NAME_RANDOM_BUTTON                               :{BLACK}Random name
+STR_FOUND_TOWN_NAME_RANDOM_TOOLTIP                              :{BLACK}Generate new random name
+
 STR_FOUND_TOWN_INITIAL_SIZE_TITLE                               :{YELLOW}Town size:
 STR_FOUND_TOWN_INITIAL_SIZE_SMALL_BUTTON                        :{BLACK}Small
 STR_FOUND_TOWN_INITIAL_SIZE_MEDIUM_BUTTON                       :{BLACK}Medium
diff --git a/src/strings.cpp b/src/strings.cpp
index 437619480..ecf3b6294 100644
--- a/src/strings.cpp
+++ b/src/strings.cpp
@@ -38,6 +38,7 @@
 #include "engine_base.h"
 #include "strgen/strgen.h"
 #include "gfx_func.h"
+#include "townname_func.h"
 
 #include "table/strings.h"
 #include "table/control_codes.h"
@@ -105,7 +106,7 @@ const char *GetStringPtr(StringID string)
  * @param last
  * @return a formatted string of char
  */
-static char *GetStringWithArgs(char *buffr, uint string, int64 *argv, const char *last)
+char *GetStringWithArgs(char *buffr, uint string, int64 *argv, const char *last)
 {
 	if (GB(string, 0, 16) == 0) return GetStringWithArgs(buffr, STR_UNDEFINED, argv, last);
 
@@ -913,27 +914,13 @@ static char *FormatString(char *buff, const char *str, int64 *argv, uint casei,
 
 			case SCC_TOWN_NAME: { // {TOWN}
 				const Town *t = Town::Get(GetInt32(&argv));
-				int64 temp[1];
 
 				assert(t != NULL);
 
-				temp[0] = t->townnameparts;
-				uint32 grfid = t->townnamegrfid;
-
 				if (t->name != NULL) {
 					buff = strecpy(buff, t->name, last);
-				} else if (grfid == 0) {
-					/* Original town name */
-					buff = GetStringWithArgs(buff, t->townnametype, temp, last);
 				} else {
-					/* Newgrf town name */
-					if (GetGRFTownName(grfid) != NULL) {
-						/* The grf is loaded */
-						buff = GRFTownNameGenerate(buff, t->townnamegrfid, t->townnametype, t->townnameparts, last);
-					} else {
-						/* Fallback to english original */
-						buff = GetStringWithArgs(buff, SPECSTR_TOWNNAME_ENGLISH, temp, last);
-					}
+					buff = GetTownName(buff, t, last);
 				}
 				break;
 			}
diff --git a/src/strings_func.h b/src/strings_func.h
index 1cc286f0d..e4b1cd3bd 100644
--- a/src/strings_func.h
+++ b/src/strings_func.h
@@ -16,6 +16,7 @@
 
 char *InlineString(char *buf, StringID string);
 char *GetString(char *buffr, StringID string, const char *last);
+char *GetStringWithArgs(char *buffr, uint string, int64 *argv, const char *last);
 const char *GetStringPtr(StringID string);
 
 void InjectDParam(uint amount);
diff --git a/src/town.h b/src/town.h
index c2a73f306..ac5b988ec 100644
--- a/src/town.h
+++ b/src/town.h
@@ -212,7 +212,6 @@ HouseZonesBits GetTownRadiusGroup(const Town *t, TileIndex tile);
 void SetTownRatingTestMode(bool mode);
 uint GetMaskOfTownActions(int *nump, CompanyID cid, const Town *t);
 bool GenerateTowns(TownLayout layout);
-bool GenerateTownName(uint32 *townnameparts);
 
 
 /** Town actions of a company. */
diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
index b078fe982..6d8a4c31e 100644
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -50,6 +50,8 @@
 #include "core/smallmap_type.hpp"
 #include "core/pool_func.hpp"
 #include "town.h"
+#include "townname_func.h"
+#include "townname_type.h"
 
 #include "table/strings.h"
 #include "table/town_land.h"
@@ -1392,90 +1394,6 @@ void UpdateTownRadius(Town *t)
 	}
 }
 
-extern int _nb_orig_names;
-
-/**
- * Struct holding a parameters used to generate town name.
- * Speeds things up a bit because these values are computed only once per name generation.
- */
-struct TownNameParams {
-	uint32 grfid;        ///< newgrf ID
-	uint16 townnametype; ///< town name style
-	bool grf;            ///< true iff a newgrf is used to generate town name
-
-	TownNameParams(byte town_name)
-	{
-		this->grf = town_name >= _nb_orig_names;
-		this->grfid = this->grf ? GetGRFTownNameId(town_name - _nb_orig_names) : 0;
-		this->townnametype = this->grf ? GetGRFTownNameType(town_name - _nb_orig_names) : SPECSTR_TOWNNAME_START + town_name;
-	}
-};
-
-/**
- * Verifies the town name is valid and unique.
- * @param r random bits
- * @param par town name parameters
- * @return true iff name is valid and unique
- */
-static bool VerifyTownName(uint32 r, const TownNameParams *par)
-{
-	/* Reserve space for extra unicode character. We need to do this to be able
-	 * to detect too long town name. */
-	char buf1[MAX_LENGTH_TOWN_NAME_BYTES + MAX_CHAR_LENGTH];
-	char buf2[MAX_LENGTH_TOWN_NAME_BYTES + MAX_CHAR_LENGTH];
-
-	SetDParam(0, r);
-	if (par->grf && par->grfid != 0) {
-		GRFTownNameGenerate(buf1, par->grfid, par->townnametype, r, lastof(buf1));
-	} else {
-		GetString(buf1, par->townnametype, lastof(buf1));
-	}
-
-	/* Check size and width */
-	if (strlen(buf1) >= MAX_LENGTH_TOWN_NAME_BYTES) return false;
-
-	const Town *t;
-	FOR_ALL_TOWNS(t) {
-		/* We can't just compare the numbers since
-		 * several numbers may map to a single name. */
-		SetDParam(0, t->index);
-		GetString(buf2, STR_TOWN_NAME, lastof(buf2));
-		if (strcmp(buf1, buf2) == 0) return false;
-	}
-
-	return true;
-}
-
-/**
- * Generates valid town name.
- * @param townnameparts if a name is generated, it's stored there
- * @return true iff a name was generated
- */
-bool GenerateTownName(uint32 *townnameparts)
-{
-	/* Do not set too low tries, since when we run out of names, we loop
-	 * for #tries only one time anyway - then we stop generating more
-	 * towns. Do not show it too high neither, since looping through all
-	 * the other towns may take considerable amount of time (10000 is
-	 * too much). */
-	int tries = 1000;
-	TownNameParams par(_settings_game.game_creation.town_name);
-
-	assert(townnameparts != NULL);
-
-	for (;;) {
-		uint32 r = InteractiveRandom();
-
-		if (!VerifyTownName(r, &par)) {
-			if (tries-- < 0) return false;
-			continue;
-		}
-
-		*townnameparts = r;
-		return true;
-	}
-}
-
 void UpdateTownMaxPass(Town *t)
 {
 	t->max_pass = t->population >> 3;
@@ -1526,6 +1444,7 @@ static void DoCreateTown(Town *t, TileIndex tile, uint32 townnameparts, TownSize
 	t->exclusive_counter = 0;
 	t->statues = 0;
 
+	extern int _nb_orig_names;
 	if (_settings_game.game_creation.town_name < _nb_orig_names) {
 		/* Original town name */
 		t->townnamegrfid = 0;
@@ -1587,6 +1506,22 @@ static CommandCost TownCanBePlacedHere(TileIndex tile)
 	return CommandCost(EXPENSES_OTHER);
 }
 
+/**
+ * Verifies this custom name is unique. Only custom names are checked.
+ * @param name name to check
+ * @return is this name unique?
+ */
+static bool IsUniqueTownName(const char *name)
+{
+	const Town *t;
+
+	FOR_ALL_TOWNS(t) {
+		if (t->name != NULL && strcmp(t->name, name) == 0) return false;
+	}
+
+	return true;
+}
+
 /** Create a new town.
  * This obviously only works in the scenario editor. Function not removed
  * as it might be possible in the future to fund your own town :)
@@ -1615,7 +1550,14 @@ CommandCost CmdFoundTown(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
 	if (size > TS_RANDOM) return CMD_ERROR;
 	if (layout > TL_RANDOM) return CMD_ERROR;
 
-	if (!VerifyTownName(townnameparts, &par)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
+	if (StrEmpty(text)) {
+		/* If supplied name is empty, townnameparts has to generate unique automatic name */
+		if (!VerifyTownName(townnameparts, &par)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
+	} else {
+		/* If name is not empty, it has to be unique custom name */
+		if (strlen(text) >= MAX_LENGTH_TOWN_NAME_BYTES) return CMD_ERROR;
+		if (!IsUniqueTownName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
+	}
 
 	/* Allocate town struct */
 	if (!Town::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_TOWNS);
@@ -1630,19 +1572,21 @@ CommandCost CmdFoundTown(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
 	if (flags & DC_EXEC) {
 		_generating_world = true;
 		UpdateNearestTownForRoadTiles(true);
+		Town *t;
 		if (random) {
-			const Town *t = CreateRandomTown(20, townnameparts, size, city, layout);
+			t = CreateRandomTown(20, townnameparts, size, city, layout);
 			if (t == NULL) {
 				cost = CommandCost(STR_ERROR_NO_SPACE_FOR_TOWN);
 			} else {
 				_new_town_id = t->index;
 			}
 		} else {
-			Town *t = new Town(tile);
+			t = new Town(tile);
 			DoCreateTown(t, tile, townnameparts, size, city, layout);
 		}
 		UpdateNearestTownForRoadTiles(false);
 		_generating_world = false;
+		if (t != NULL && !StrEmpty(text)) t->name = strdup(text);
 	}
 	return cost;
 }
@@ -2312,17 +2256,6 @@ void ClearTownHouse(Town *t, TileIndex tile)
 	if (eflags & BUILDING_HAS_4_TILES) DoClearTownHouseHelper(tile + TileDiffXY(1, 1), t, ++house);
 }
 
-static bool IsUniqueTownName(const char *name)
-{
-	const Town *t;
-
-	FOR_ALL_TOWNS(t) {
-		if (t->name != NULL && strcmp(t->name, name) == 0) return false;
-	}
-
-	return true;
-}
-
 /** Rename a town (server-only).
  * @param tile unused
  * @param flags type of operation
diff --git a/src/town_gui.cpp b/src/town_gui.cpp
index f5bce66a4..4a001f1dc 100644
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -34,6 +34,11 @@
 #include "landscape.h"
 #include "cargotype.h"
 #include "tile_map.h"
+#include "querystring_gui.h"
+#include "window_func.h"
+#include "string_func.h"
+#include "townname_func.h"
+#include "townname_type.h"
 
 #include "table/sprites.h"
 #include "table/strings.h"
@@ -850,11 +855,7 @@ void CcFoundTown(bool success, TileIndex tile, uint32 p1, uint32 p2)
 
 void CcFoundRandomTown(bool success, TileIndex tile, uint32 p1, uint32 p2)
 {
-	if (success) {
-		tile = Town::Get(_new_town_id)->xy;
-		SndPlayTileFx(SND_1F_SPLAT, tile);
-		ScrollMainWindowToTile(tile);
-	}
+	if (success) ScrollMainWindowToTile(Town::Get(_new_town_id)->xy);
 }
 
 /** Widget numbers of town scenario editor window. */
@@ -866,6 +867,9 @@ enum TownScenarioEditorWidgets {
 	TSEW_NEWTOWN,
 	TSEW_RANDOMTOWN,
 	TSEW_MANYRANDOMTOWNS,
+	TSEW_TOWNNAME_TEXT,
+	TSEW_TOWNNAME_EDITBOX,
+	TSEW_TOWNNAME_RANDOM,
 	TSEW_TOWNSIZE,
 	TSEW_SIZE_SMALL,
 	TSEW_SIZE_MEDIUM,
@@ -895,6 +899,14 @@ static const NWidgetPart _nested_found_town_widgets[] = {
 										SetDataTip(STR_FOUND_TOWN_RANDOM_TOWN_BUTTON, STR_FOUND_TOWN_RANDOM_TOWN_TOOLTIP), SetPadding(0, 2, 1, 2),
 		NWidget(WWT_TEXTBTN, COLOUR_GREY, TSEW_MANYRANDOMTOWNS), SetMinimalSize(156, 12), SetFill(true, false),
 										SetDataTip(STR_FOUND_TOWN_MANY_RANDOM_TOWNS, STR_FOUND_TOWN_RANDOM_TOWNS_TOOLTIP), SetPadding(0, 2, 0, 2),
+		/* Town name selection. */
+		NWidget(NWID_VERTICAL),
+			NWidget(WWT_LABEL, COLOUR_DARK_GREEN, TSEW_TOWNSIZE), SetMinimalSize(156, 14), SetDataTip(STR_FOUND_TOWN_NAME_TITLE, STR_NULL),
+			NWidget(WWT_EDITBOX, COLOUR_WHITE, TSEW_TOWNNAME_EDITBOX), SetMinimalSize(156, 12), SetDataTip(STR_FOUND_TOWN_NAME_EDITOR_TITLE, STR_FOUND_TOWN_NAME_EDITOR_HELP),
+			NWidget(NWID_SPACER), SetMinimalSize(0, 3),
+			NWidget(WWT_TEXTBTN, COLOUR_GREY, TSEW_TOWNNAME_RANDOM), SetMinimalSize(78, 12), SetFill(true, false),
+										SetDataTip(STR_FOUND_TOWN_NAME_RANDOM_BUTTON, STR_FOUND_TOWN_NAME_RANDOM_TOOLTIP),
+		EndContainer(),
 		/* Town size selection. */
 		NWidget(NWID_HORIZONTAL),
 			NWidget(NWID_SPACER), SetFill(true, false),
@@ -940,23 +952,41 @@ static const NWidgetPart _nested_found_town_widgets[] = {
 };
 
 /** Found a town window class. */
-struct FoundTownWindow : Window {
+struct FoundTownWindow : QueryStringBaseWindow {
 private:
 	TownSize town_size;     ///< Selected town size
 	TownLayout town_layout; ///< Selected town layout
 	bool city;              ///< Are we building a city?
+	bool townnamevalid;     ///< Is generated town name valid?
+	uint32 townnameparts;   ///< Generated town name
+	TownNameParams params;  ///< Town name parameters
 
 public:
 	FoundTownWindow(const WindowDesc *desc, WindowNumber window_number) :
-			Window(),
+			QueryStringBaseWindow(MAX_LENGTH_TOWN_NAME_BYTES),
 			town_size(TS_MEDIUM),
 			town_layout(_settings_game.economy.town_layout),
-			city(false)
+			params(_settings_game.game_creation.town_name)
 	{
 		this->InitNested(desc, window_number);
+		this->RandomTownName();
 		this->UpdateButtons();
 	}
 
+	void RandomTownName()
+	{
+		this->townnamevalid = GenerateTownName(&this->townnameparts);
+
+		if (!this->townnamevalid) {
+			this->edit_str_buf[0] = '\0';
+		} else {
+			GetTownName(this->edit_str_buf, &this->params, this->townnameparts, &this->edit_str_buf[this->edit_str_size - 1]);
+		}
+		InitializeTextBuffer(&this->text, this->edit_str_buf, this->edit_str_size, MAX_LENGTH_TOWN_NAME_PIXELS);
+
+		this->SetFocusedWidget(TSEW_TOWNNAME_EDITBOX);
+	}
+
 	void UpdateButtons()
 	{
 		for (int i = TSEW_SIZE_SMALL; i <= TSEW_SIZE_RANDOM; i++) {
@@ -974,19 +1004,27 @@ public:
 
 	void ExecuteFoundTownCommand(TileIndex tile, bool random, StringID errstr, CommandCallback cc)
 	{
-		uint32 townnameparts;
-		if (!GenerateTownName(&townnameparts)) {
-			ShowErrorMessage(STR_ERROR_TOO_MANY_TOWNS, errstr, 0, 0);
-			return;
+		const char *name = NULL;
+
+		if (!this->townnamevalid) {
+			name = this->edit_str_buf;
+		} else {
+			/* If user changed the name, send it */
+			char buf[MAX_LENGTH_TOWN_NAME_BYTES];
+			GetTownName(buf, &this->params, this->townnameparts, lastof(buf));
+			if (strcmp(buf, this->edit_str_buf) != 0) name = this->edit_str_buf;
 		}
 
-		DoCommandP(tile, this->town_size | this->city << 2 | this->town_layout << 3 | random << 6,
-				townnameparts, CMD_FOUND_TOWN | CMD_MSG(errstr), cc);
+		bool success = DoCommandP(tile, this->town_size | this->city << 2 | this->town_layout << 3 | random << 6,
+				townnameparts, CMD_FOUND_TOWN | CMD_MSG(errstr), cc, name);
+
+		if (success) this->RandomTownName();
 	}
 
 	virtual void OnPaint()
 	{
 		this->DrawWidgets();
+		this->DrawEditBox(TSEW_TOWNNAME_EDITBOX);
 	}
 
 	virtual void OnClick(Point pt, int widget)
@@ -1001,6 +1039,10 @@ public:
 				this->ExecuteFoundTownCommand(0, true, STR_ERROR_CAN_T_GENERATE_TOWN, CcFoundRandomTown);
 				break;
 
+			case TSEW_TOWNNAME_RANDOM:
+				this->RandomTownName();
+				break;
+
 			case TSEW_MANYRANDOMTOWNS:
 				this->HandleButtonClick(TSEW_MANYRANDOMTOWNS);
 
@@ -1039,6 +1081,18 @@ public:
 		this->SetDirty();
 	}
 
+	virtual void OnMouseLoop()
+	{
+		this->HandleEditBox(TSEW_TOWNNAME_EDITBOX);
+	}
+
+	virtual EventState OnKeyPress(uint16 key, uint16 keycode)
+	{
+		EventState state;
+		this->HandleEditBoxKey(TSEW_TOWNNAME_EDITBOX, key, keycode, state);
+		return state;
+	}
+
 	virtual void OnPlaceObject(Point pt, TileIndex tile)
 	{
 		this->ExecuteFoundTownCommand(tile, false, STR_ERROR_CAN_T_FOUND_TOWN_HERE, CcFoundTown);
diff --git a/src/townname.cpp b/src/townname.cpp
index ec63267b8..e444f2dc6 100644
--- a/src/townname.cpp
+++ b/src/townname.cpp
@@ -12,12 +12,126 @@
 #include "stdafx.h"
 #include "townname_func.h"
 #include "string_func.h"
+#include "townname_func.h"
+#include "townname_type.h"
+#include "town.h"
 #include "core/alloc_func.hpp"
+#include "strings_func.h"
 
 #include "table/townname.h"
 
 
 /**
+ * Initializes this struct from town data
+ * @param t town for which we will be printing name later
+ */
+TownNameParams::TownNameParams(const Town *t) :
+		grfid(t->townnamegrfid), // by default, use supplied data
+		type(t->townnametype)
+{
+	if (t->townnamegrfid != 0 && GetGRFTownName(t->townnamegrfid) == NULL) {
+		/* Fallback to english original */
+		this->grfid = 0;
+		this->type = SPECSTR_TOWNNAME_ENGLISH;
+		return;
+	}
+}
+
+
+/**
+ * Fills buffer with specified town name
+ * @param buff buffer start
+ * @param par town name parameters
+ * @param townnameparts 'encoded' town name
+ * @param last end of buffer
+ * @return pointer to terminating '\0'
+ */
+char *GetTownName(char *buff, const TownNameParams *par, uint32 townnameparts, const char *last)
+{
+	if (par->grfid == 0) {
+		int64 temp[1] = { townnameparts };
+		return GetStringWithArgs(buff, par->type, temp, last);
+	}
+
+	return GRFTownNameGenerate(buff, par->grfid, par->type, townnameparts, last);
+}
+
+
+/**
+ * Fills buffer with town's name
+ * @param buff buffer start
+ * @param t we want to get name of this town
+ * @param last end of buffer
+ * @return pointer to terminating '\0'
+ */
+char *GetTownName(char *buff, const Town *t, const char *last)
+{
+	TownNameParams par(t);
+	return GetTownName(buff, &par, t->townnameparts, last);
+}
+
+
+/**
+ * Verifies the town name is valid and unique.
+ * @param r random bits
+ * @param par town name parameters
+ * @return true iff name is valid and unique
+ */
+bool VerifyTownName(uint32 r, const TownNameParams *par)
+{
+	/* reserve space for extra unicode character and terminating '\0' */
+	char buf1[MAX_LENGTH_TOWN_NAME_BYTES + MAX_CHAR_LENGTH];
+	char buf2[MAX_LENGTH_TOWN_NAME_BYTES + MAX_CHAR_LENGTH];
+
+	GetTownName(buf1, par, r, lastof(buf1));
+
+	/* Check size and width */
+	if (strlen(buf1) >= MAX_LENGTH_TOWN_NAME_BYTES) return false;
+
+	const Town *t;
+	FOR_ALL_TOWNS(t) {
+		/* We can't just compare the numbers since
+		 * several numbers may map to a single name. */
+		const char *buf = t->name;
+		if (buf == NULL) {
+			GetTownName(buf2, t, lastof(buf2));
+			buf = buf2;
+		}
+		if (strcmp(buf1, buf2) == 0) return false;
+	}
+
+	return true;
+}
+
+
+/**
+ * Generates valid town name.
+ * @param townnameparts if a name is generated, it's stored there
+ * @return true iff a name was generated
+ */
+bool GenerateTownName(uint32 *townnameparts)
+{
+	/* Do not set too low tries, since when we run out of names, we loop
+	 * for #tries only one time anyway - then we stop generating more
+	 * towns. Do not show it too high neither, since looping through all
+	 * the other towns may take considerable amount of time (10000 is
+	 * too much). */
+	TownNameParams par(_settings_game.game_creation.town_name);
+
+	for (int i = 1000; i != 0; i--) {
+		uint32 r = InteractiveRandom();
+		if (!VerifyTownName(r, &par)) continue;
+
+		*townnameparts = r;
+		return true;
+	}
+
+	return false;
+}
+
+
+
+/**
  * Generates a number from given seed.
  * @param shift_by number of bits seed is shifted to the right
  * @param max generated number is in interval 0...max-1
diff --git a/src/townname_func.h b/src/townname_func.h
index d0e2da77c..39db34b29 100644
--- a/src/townname_func.h
+++ b/src/townname_func.h
@@ -9,9 +9,13 @@
 
 /** @file townname_func.h Town name generator stuff. */
 
-#ifndef NAMEGEN_FUNC_H
-#define NAMEGEN_FUNC_H
+#ifndef TOWNNAME_FUNC_H
+#define TOWNNAME_FUNC_H
 
 char *GenerateTownNameString(char *buf, const char *last, size_t lang, uint32 seed);
+char *GetTownName(char *buff, const struct TownNameParams *par, uint32 townnameparts, const char *last);
+char *GetTownName(char *buff, const struct Town *t, const char *last);
+bool VerifyTownName(uint32 r, const struct TownNameParams *par);
+bool GenerateTownName(uint32 *townnameparts);
 
-#endif /* NAMEGEN_FUNC_H */
+#endif /* TOWNNAME_FUNC_H */
diff --git a/src/townname_type.h b/src/townname_type.h
new file mode 100644
index 000000000..a9b59cd7d
--- /dev/null
+++ b/src/townname_type.h
@@ -0,0 +1,42 @@
+/* $Id$ */
+
+/*
+ * 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 townname_type.h
+ * Definition of structures used for generating town names.
+ */
+
+#ifndef TOWNNAME_TYPE_H
+#define TOWNNAME_TYPE_H
+
+#include "newgrf_townname.h"
+
+/**
+ * Struct holding a parameters used to generate town name.
+ * Speeds things up a bit because these values are computed only once per name generation.
+ */
+struct TownNameParams {
+	uint32 grfid; ///< newgrf ID (0 if not used)
+	uint16 type;  ///< town name style
+
+	/**
+	 * Initializes this struct from language ID
+	 * @param town_name town name 'language' ID
+	 */
+	TownNameParams(byte town_name)
+	{
+		extern int _nb_orig_names;
+		bool grf = town_name >= _nb_orig_names;
+		this->grfid = grf ? GetGRFTownNameId(town_name - _nb_orig_names) : 0;
+		this->type = grf ? GetGRFTownNameType(town_name - _nb_orig_names) : SPECSTR_TOWNNAME_START + town_name;
+	}
+
+	TownNameParams(const struct Town *t);
+};
+
+#endif /* TOWNNAME_TYPE_H */