Method IsVisibleByRestrictionMode

src/settingentry_gui.cpp:176–209

* Checks whether an entry shall be made visible based on the restriction mode. * @param mode The current status of the restriction drop down box. * @return true if the entry shall be visible. */

 * @return true if the entry shall be visible.
 */
bool SettingEntry::IsVisibleByRestrictionMode(RestrictionMode mode) const
{
	/* There shall not be any restriction, i.e. all settings shall be visible. */
	if (mode == RM_ALL) return true;

	const IntSettingDesc *sd = this->setting;

	if (mode == RM_BASIC) return (this->setting->cat & SC_BASIC_LIST) != 0;
	if (mode == RM_ADVANCED) return (this->setting->cat & SC_ADVANCED_LIST) != 0;

	/* Read the current value. */
	const void *object = ResolveObject(&GetGameSettings(), sd);
	int64_t current_value = sd->Read(object);
	int64_t filter_value;

	if (mode == RM_CHANGED_AGAINST_DEFAULT) {
		/* This entry shall only be visible, if the value deviates from its default value. */

		/* Read the default value. */
		filter_value = sd->GetDefaultValue();
	} else {
		assert(mode == RM_CHANGED_AGAINST_NEW);
		/* This entry shall only be visible, if the value deviates from
		 * its value is used when starting a new game. */

		/* Make sure we're not comparing the new game settings against itself. */
		assert(&GetGameSettings() != &_settings_newgame);

		/* Read the new game's value. */
		filter_value = sd->Read(ResolveObject(&_settings_newgame, sd));
	}

	return current_value != filter_value;
}

/**
 * Update the filter state.