/**
* Place a sign at the given coordinates. Ownership of sign has
* no effect whatsoever except for the colour the sign gets for easy recognition,
* but everybody is able to rename/remove it.
* @param tile tile to place sign at
* @param flags type of operation
* @param p1 unused
* @param p2 unused
* @param text unused
* @return the cost of this operation or an error
*/
CommandCost CmdPlaceSign(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
/* Try to locate a new sign */
if (!Sign::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_SIGNS);
/* Check sign text length if any */
if (!StrEmpty(text) && Utf8StringLength(text) >= MAX_LENGTH_SIGN_NAME_CHARS) return CMD_ERROR;
/* When we execute, really make the sign */
if (flags & DC_EXEC) {
Sign *si = new Sign(_current_company);
int x = TileX(tile) * TILE_SIZE;
int y = TileY(tile) * TILE_SIZE;
si->x = x;
si->y = y;
si->z = GetSlopeZ(x, y);
if (!StrEmpty(text)) {
si->name = strdup(text);
}
si->UpdateVirtCoord();
InvalidateWindowData(WC_SIGN_LIST, 0, 0);
_new_sign_id = si->index;
}
return CommandCost();
}
/**
* Rename a sign. If the new name of the sign is empty, we assume
* the user wanted to delete it. So delete it. Ownership of signs
* has no meaning/effect whatsoever except for eyecandy
* @param tile unused
* @param flags type of operation
* @param p1 index of the sign to be renamed/removed
* @param p2 unused
* @param text the new name or an empty string when resetting to the default
* @return the cost of this operation or an error
*/
CommandCost CmdRenameSign(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
Sign *si = Sign::GetIfValid(p1);
if (si == NULL) return CMD_ERROR;
/* Rename the signs when empty, otherwise remove it */
if (!StrEmpty(text)) {
if (Utf8StringLength(text) >= MAX_LENGTH_SIGN_NAME_CHARS) return CMD_ERROR;
if (flags & DC_EXEC) {
/* Delete the old name */
free(si->name);
/* Assign the new one */
si->name = strdup(text);
si->owner = _current_company;
si->UpdateVirtCoord();
InvalidateWindowData(WC_SIGN_LIST, 0, 1);
}
} else { // Delete sign
if (flags & DC_EXEC) {
si->sign.MarkDirty();
delete si;
InvalidateWindowData(WC_SIGN_LIST, 0, 0);
}
}
return CommandCost();
}
/** Update the coordinates of all signs */
void UpdateAllSignVirtCoords()
{
Sign *si;
FOR_ALL_SIGNS(si) {
si->UpdateVirtCoord();
}
}