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import getOppositePlacement from "../utils/getOppositePlacement.js";
import getBasePlacement from "../utils/getBasePlacement.js";
import getOppositeVariationPlacement from "../utils/getOppositeVariationPlacement.js";
import detectOverflow from "../utils/detectOverflow.js";
import computeAutoPlacement from "../utils/computeAutoPlacement.js";
import { bottom, top, start, right, left, auto } from "../enums.js";
import getVariation from "../utils/getVariation.js"; // eslint-disable-next-line import/no-unused-modules
function getExpandedFallbackPlacements(placement) {
if (getBasePlacement(placement) === auto) {
return [];
}
var oppositePlacement = getOppositePlacement(placement);
return [getOppositeVariationPlacement(placement), oppositePlacement, getOppositeVariationPlacement(oppositePlacement)];
}
function flip(_ref) {
var state = _ref.state,
options = _ref.options,
name = _ref.name;
if (state.modifiersData[name]._skip) {
return;
}
var _options$mainAxis = options.mainAxis,
checkMainAxis = _options$mainAxis === void 0 ? true : _options$mainAxis,
_options$altAxis = options.altAxis,
checkAltAxis = _options$altAxis === void 0 ? true : _options$altAxis,
specifiedFallbackPlacements = options.fallbackPlacements,
padding = options.padding,
boundary = options.boundary,
rootBoundary = options.rootBoundary,
altBoundary = options.altBoundary,
_options$flipVariatio = options.flipVariations,
flipVariations = _options$flipVariatio === void 0 ? true : _options$flipVariatio,
allowedAutoPlacements = options.allowedAutoPlacements;
var preferredPlacement = state.options.placement;
var basePlacement = getBasePlacement(preferredPlacement);
var isBasePlacement = basePlacement === preferredPlacement;
var fallbackPlacements = specifiedFallbackPlacements || (isBasePlacement || !flipVariations ? [getOppositePlacement(preferredPlacement)] : getExpandedFallbackPlacements(preferredPlacement));
var placements = [preferredPlacement].concat(fallbackPlacements).reduce(function (acc, placement) {
return acc.concat(getBasePlacement(placement) === auto ? computeAutoPlacement(state, {
placement: placement,
boundary: boundary,
rootBoundary: rootBoundary,
padding: padding,
flipVariations: flipVariations,
allowedAutoPlacements: allowedAutoPlacements
}) : placement);
}, []);
var referenceRect = state.rects.reference;
var popperRect = state.rects.popper;
var checksMap = new Map();
var makeFallbackChecks = true;
var firstFittingPlacement = placements[0];
for (var i = 0; i < placements.length; i++) {
var placement = placements[i];
var _basePlacement = getBasePlacement(placement);
var isStartVariation = getVariation(placement) === start;
var isVertical = [top, bottom].indexOf(_basePlacement) >= 0;
var len = isVertical ? 'width' : 'height';
var overflow = detectOverflow(state, {
placement: placement,
boundary: boundary,
rootBoundary: rootBoundary,
altBoundary: altBoundary,
padding: padding
});
var mainVariationSide = isVertical ? isStartVariation ? right : left : isStartVariation ? bottom : top;
if (referenceRect[len] > popperRect[len]) {
mainVariationSide = getOppositePlacement(mainVariationSide);
}
var altVariationSide = getOppositePlacement(mainVariationSide);
var checks = [];
if (checkMainAxis) {
checks.push(overflow[_basePlacement] <= 0);
}
if (checkAltAxis) {
checks.push(overflow[mainVariationSide] <= 0, overflow[altVariationSide] <= 0);
}
if (checks.every(function (check) {
return check;
})) {
firstFittingPlacement = placement;
makeFallbackChecks = false;
break;
}
checksMap.set(placement, checks);
}
if (makeFallbackChecks) {
// `2` may be desired in some cases – research later
var numberOfChecks = flipVariations ? 3 : 1;
var _loop = function _loop(_i) {
var fittingPlacement = placements.find(function (placement) {
var checks = checksMap.get(placement);
if (checks) {
return checks.slice(0, _i).every(function (check) {
return check;
});
}
});
if (fittingPlacement) {
firstFittingPlacement = fittingPlacement;
return "break";
}
};
for (var _i = numberOfChecks; _i > 0; _i--) {
var _ret = _loop(_i);
if (_ret === "break") break;
}
}
if (state.placement !== firstFittingPlacement) {
state.modifiersData[name]._skip = true;
state.placement = firstFittingPlacement;
state.reset = true;
}
} // eslint-disable-next-line import/no-unused-modules
export default {
name: 'flip',
enabled: true,
phase: 'main',
fn: flip,
requiresIfExists: ['offset'],
data: {
_skip: false
}
};
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