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(svn r11137) -Feature: [NewGRF] Add support for bit 17 of property 1A for Industries. This bit enables the protection of the last instance of an industry type once raise.

release/0.6
belugas 2007-09-22 00:59:27 +00:00
parent a6a8502ca3
commit 47dd4989a8
2 changed files with 27 additions and 4 deletions
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1
src/industry.h
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@ -81,6 +81,7 @@ enum IndustyBehaviour {
INDUSTRYBEH_AIRPLANE_ATTACKS = 1 << 11, ///< can be exploded by a military airplane (oil refinery)
INDUSTRYBEH_CHOPPER_ATTACKS = 1 << 12, ///< can be exploded by a military helicopter (factory)
INDUSTRYBEH_CAN_SUBSIDENCE = 1 << 13, ///< can cause a subsidence (coal mine, shaft that collapses)
INDUSTRYBEH_CANCLOSE_LASTINSTANCE = 1 << 17, ///< Allow closing down the last instance of this type
};

30
src/industry_cmd.cpp
View File

@ -1694,6 +1694,24 @@ void GenerateIndustries()
}
}
/**
* Protects an industry from closure if the appropriate flags and conditions are met
* INDUSTRYBEH_CANCLOSE_LASTINSTANCE must be set (which, by default, it is not) and the
* count of industries of this type must one (or lower) in order to be protected
* against closure.
* @param type IndustryType been queried
* @result true if protection is on, false otherwise (except for oil wells)
*/
static bool CheckIndustryCloseDownProtection(IndustryType type)
{
const IndustrySpec *indspec = GetIndustrySpec(type);
/* oil wells (or the industries with that flag set) are always allowed to closedown */
if (indspec->behaviour & INDUSTRYBEH_DONT_INCR_PROD && _opt.landscape == LT_TEMPERATE) return false;
return (indspec->behaviour & INDUSTRYBEH_CANCLOSE_LASTINSTANCE && GetIndustryTypeCount(type) <= 1);
}
/** Change industry production or do closure
* @param i Industry for which changes are performed
*/
@ -1752,7 +1770,7 @@ static void ExtChangeIndustryProduction(Industry *i)
}
/* If industry will be closed down, show this */
if (closeit) {
if (closeit && !CheckIndustryCloseDownProtection(i->type)) {
i->prod_level = 0;
SetDParam(0, i->index);
AddNewsItem(
@ -1895,8 +1913,12 @@ static void ChangeIndustryProduction(Industry *i)
} else {
/* Decrease production */
if (i->prod_level == 4) {
i->prod_level = 0;
str = indspec->closure_text;
/* Really set the production to 0 when the industrytype allows it,
* since it is equivalent to closing it. */
if (!CheckIndustryCloseDownProtection(i->type)) {
i->prod_level = 0;
str = indspec->closure_text;
}
} else {
i->prod_level >>= 1;
i->production_rate[0] = (i->production_rate[0] + 1) >> 1;
@ -1909,7 +1931,7 @@ static void ChangeIndustryProduction(Industry *i)
}
if (indspec->life_type & INDUSTRYLIFE_PROCESSING) {
/* maybe close */
if ( (byte)(_cur_year - i->last_prod_year) >= 5 && CHANCE16(1, 2)) {
if ( (byte)(_cur_year - i->last_prod_year) >= 5 && CHANCE16(1, 2) && !CheckIndustryCloseDownProtection(i->type)) {
i->prod_level = 0;
str = indspec->closure_text;
}